Code Coverage |
||||||||||
Lines |
Functions and Methods |
Classes and Traits |
||||||||
| Total | |
68.46% |
3651 / 5333 |
|
22.62% |
57 / 252 |
CRAP | |
0.00% |
0 / 1 |
| Painter | |
68.46% |
3651 / 5333 |
|
22.62% |
57 / 252 |
116363.73 | |
0.00% |
0 / 1 |
| __construct | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| __destruct | |
100.00% |
3 / 3 |
|
100.00% |
1 / 1 |
3 | |||
| paint | |
100.00% |
8 / 8 |
|
100.00% |
1 / 1 |
1 | |||
| resolveOverflowPropagation | |
100.00% |
10 / 10 |
|
100.00% |
1 / 1 |
6 | |||
| boxOverflowIsVisible | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
2 | |||
| paintCanvasBackgroundFromRoot | |
65.96% |
31 / 47 |
|
0.00% |
0 / 1 |
19.67 | |||
| propagatedOriginRect | |
100.00% |
7 / 7 |
|
100.00% |
1 / 1 |
1 | |||
| boxHasPaintableBackground | |
100.00% |
8 / 8 |
|
100.00% |
1 / 1 |
3 | |||
| resolveColorWithCurrentColor | |
69.23% |
9 / 13 |
|
0.00% |
0 / 1 |
11.36 | |||
| preferredLightDarkArm | |
0.00% |
0 / 16 |
|
0.00% |
0 / 1 |
90 | |||
| resolveRelativeColor | |
0.00% |
0 / 23 |
|
0.00% |
0 / 1 |
156 | |||
| resolveSlotPermutation | |
0.00% |
0 / 43 |
|
0.00% |
0 / 1 |
156 | |||
| srgbToHsl | |
0.00% |
0 / 13 |
|
0.00% |
0 / 1 |
42 | |||
| srgbToHwb | |
0.00% |
0 / 4 |
|
0.00% |
0 / 1 |
2 | |||
| hslToRgb | |
0.00% |
0 / 22 |
|
0.00% |
0 / 1 |
72 | |||
| hwbToRgb | |
0.00% |
0 / 9 |
|
0.00% |
0 / 1 |
6 | |||
| relativeColorSlotIdents | |
0.00% |
0 / 25 |
|
0.00% |
0 / 1 |
110 | |||
| isIdentMatching | |
0.00% |
0 / 2 |
|
0.00% |
0 / 1 |
6 | |||
| isAlphaSlotOrOne | |
0.00% |
0 / 3 |
|
0.00% |
0 / 1 |
6 | |||
| findBodyChild | |
71.43% |
5 / 7 |
|
0.00% |
0 / 1 |
6.84 | |||
| boxIsPaintContained | |
33.33% |
3 / 9 |
|
0.00% |
0 / 1 |
16.67 | |||
| containKeywordImpliesPaint | |
100.00% |
6 / 6 |
|
100.00% |
1 / 1 |
6 | |||
| containImpliesPaintClip | |
33.33% |
3 / 9 |
|
0.00% |
0 / 1 |
16.67 | |||
| containKeywordClips | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
3 | |||
| paintOrderChildren | |
100.00% |
39 / 39 |
|
100.00% |
1 / 1 |
24 | |||
| isPositioned | |
83.33% |
5 / 6 |
|
0.00% |
0 / 1 |
4.07 | |||
| isFloat | |
83.33% |
5 / 6 |
|
0.00% |
0 / 1 |
4.07 | |||
| orderOf | |
50.00% |
3 / 6 |
|
0.00% |
0 / 1 |
4.12 | |||
| zIndexOf | |
63.64% |
7 / 11 |
|
0.00% |
0 / 1 |
6.20 | |||
| paintBox | |
96.30% |
78 / 81 |
|
0.00% |
0 / 1 |
30 | |||
| paintMaskedGroup | |
84.38% |
27 / 32 |
|
0.00% |
0 / 1 |
6.14 | |||
| boxEntirelyOffPage | |
100.00% |
9 / 9 |
|
100.00% |
1 / 1 |
5 | |||
| applyBoxTransform | |
94.44% |
17 / 18 |
|
0.00% |
0 / 1 |
8.01 | |||
| hasMotionPath | |
100.00% |
3 / 3 |
|
100.00% |
1 / 1 |
3 | |||
| motionShape | |
50.00% |
4 / 8 |
|
0.00% |
0 / 1 |
8.12 | |||
| motionRay | |
62.50% |
5 / 8 |
|
0.00% |
0 / 1 |
6.32 | |||
| motionPathFunctions | |
92.31% |
12 / 13 |
|
0.00% |
0 / 1 |
5.01 | |||
| motionPlacement | |
46.34% |
19 / 41 |
|
0.00% |
0 / 1 |
17.89 | |||
| pointAlongPolyline | |
0.00% |
0 / 29 |
|
0.00% |
0 / 1 |
90 | |||
| motionShapePolyline | |
0.00% |
0 / 50 |
|
0.00% |
0 / 1 |
56 | |||
| shapeCentre | |
0.00% |
0 / 6 |
|
0.00% |
0 / 1 |
12 | |||
| offsetPositionPoint | |
0.00% |
0 / 14 |
|
0.00% |
0 / 1 |
30 | |||
| shapeRadius | |
0.00% |
0 / 35 |
|
0.00% |
0 / 1 |
240 | |||
| motionShapeRect | |
0.00% |
0 / 36 |
|
0.00% |
0 / 1 |
20 | |||
| motionRectEdge | |
0.00% |
0 / 3 |
|
0.00% |
0 / 1 |
12 | |||
| expandBoxSides | |
0.00% |
0 / 5 |
|
0.00% |
0 / 1 |
30 | |||
| shapeCornerRadii | |
0.00% |
0 / 35 |
|
0.00% |
0 / 1 |
210 | |||
| expandCornerList | |
0.00% |
0 / 5 |
|
0.00% |
0 / 1 |
30 | |||
| ellipsePolyline | |
0.00% |
0 / 8 |
|
0.00% |
0 / 1 |
20 | |||
| roundedRectPolyline | |
0.00% |
0 / 36 |
|
0.00% |
0 / 1 |
132 | |||
| svgPathPolyline | |
0.00% |
0 / 109 |
|
0.00% |
0 / 1 |
506 | |||
| cubicSamples | |
0.00% |
0 / 14 |
|
0.00% |
0 / 1 |
6 | |||
| quadraticSamples | |
0.00% |
0 / 10 |
|
0.00% |
0 / 1 |
6 | |||
| arcSamples | |
0.00% |
0 / 45 |
|
0.00% |
0 / 1 |
182 | |||
| pixelTranslate | |
100.00% |
4 / 4 |
|
100.00% |
1 / 1 |
1 | |||
| rayAngleDegrees | |
75.00% |
3 / 4 |
|
0.00% |
0 / 1 |
3.14 | |||
| motionReferenceRect | |
53.57% |
15 / 28 |
|
0.00% |
0 / 1 |
7.50 | |||
| referenceBoxRadii | |
0.00% |
0 / 19 |
|
0.00% |
0 / 1 |
20 | |||
| motionCoordBox | |
89.47% |
17 / 19 |
|
0.00% |
0 / 1 |
6.04 | |||
| rayOrigin | |
42.11% |
8 / 19 |
|
0.00% |
0 / 1 |
16.51 | |||
| rayLength | |
48.15% |
13 / 27 |
|
0.00% |
0 / 1 |
20.29 | |||
| borderBoxExtent | |
0.00% |
0 / 5 |
|
0.00% |
0 / 1 |
2 | |||
| raySidesLength | |
0.00% |
0 / 17 |
|
0.00% |
0 / 1 |
182 | |||
| resolveMotionDistance | |
33.33% |
4 / 12 |
|
0.00% |
0 / 1 |
12.41 | |||
| resolveMotionRotation | |
85.71% |
24 / 28 |
|
0.00% |
0 / 1 |
13.49 | |||
| transformOriginCss | |
90.91% |
10 / 11 |
|
0.00% |
0 / 1 |
3.01 | |||
| motionAnchorCss | |
25.00% |
3 / 12 |
|
0.00% |
0 / 1 |
6.80 | |||
| resolvePositionComponent | |
0.00% |
0 / 16 |
|
0.00% |
0 / 1 |
90 | |||
| composeTransformMatrix | |
88.89% |
8 / 9 |
|
0.00% |
0 / 1 |
4.02 | |||
| individualTransformFunctions | |
90.91% |
10 / 11 |
|
0.00% |
0 / 1 |
4.01 | |||
| transformPropertyComponents | |
85.71% |
6 / 7 |
|
0.00% |
0 / 1 |
5.07 | |||
| individualTranslate | |
81.82% |
9 / 11 |
|
0.00% |
0 / 1 |
8.38 | |||
| individualScale | |
81.82% |
9 / 11 |
|
0.00% |
0 / 1 |
7.29 | |||
| individualRotate | |
8.33% |
3 / 36 |
|
0.00% |
0 / 1 |
188.31 | |||
| transformNumber | |
40.00% |
2 / 5 |
|
0.00% |
0 / 1 |
4.94 | |||
| transformFunctionToPdfMatrix | |
82.76% |
24 / 29 |
|
0.00% |
0 / 1 |
9.42 | |||
| multiplyMatrices | |
100.00% |
10 / 10 |
|
100.00% |
1 / 1 |
1 | |||
| resolveTransformOrigin | |
91.67% |
11 / 12 |
|
0.00% |
0 / 1 |
3.01 | |||
| resolveTransformOriginOffsets | |
90.48% |
19 / 21 |
|
0.00% |
0 / 1 |
10.09 | |||
| resolveOriginComponent | |
78.57% |
11 / 14 |
|
0.00% |
0 / 1 |
10.98 | |||
| lengthOrPercentageToFloat | |
66.67% |
2 / 3 |
|
0.00% |
0 / 1 |
2.15 | |||
| shouldClampDecorationsToPage | |
100.00% |
8 / 8 |
|
100.00% |
1 / 1 |
5 | |||
| isCloneDecorationBreak | |
75.00% |
3 / 4 |
|
0.00% |
0 / 1 |
2.06 | |||
| clampGeometryToPage | |
92.31% |
12 / 13 |
|
0.00% |
0 / 1 |
5.01 | |||
| paintImage | |
92.00% |
69 / 75 |
|
0.00% |
0 / 1 |
28.40 | |||
| objectFitKeyword | |
83.33% |
5 / 6 |
|
0.00% |
0 / 1 |
3.04 | |||
| resolveObjectFit | |
92.86% |
26 / 28 |
|
0.00% |
0 / 1 |
6.01 | |||
| resolveImageSrc | |
100.00% |
6 / 6 |
|
100.00% |
1 / 1 |
4 | |||
| fetchHttpSrc | |
64.29% |
9 / 14 |
|
0.00% |
0 / 1 |
6.14 | |||
| materializeDataUrl | |
76.92% |
10 / 13 |
|
0.00% |
0 / 1 |
7.60 | |||
| resolveBackgroundClip | |
85.71% |
6 / 7 |
|
0.00% |
0 / 1 |
3.03 | |||
| resolveBackgroundOrigin | |
85.71% |
6 / 7 |
|
0.00% |
0 / 1 |
3.03 | |||
| backgroundOriginRect | |
100.00% |
23 / 23 |
|
100.00% |
1 / 1 |
4 | |||
| shouldOverflowClip | |
100.00% |
3 / 3 |
|
100.00% |
1 / 1 |
3 | |||
| axisClips | |
100.00% |
4 / 4 |
|
100.00% |
1 / 1 |
4 | |||
| hasOverflowClip | |
100.00% |
5 / 5 |
|
100.00% |
1 / 1 |
4 | |||
| overflowClipMargin | |
57.14% |
16 / 28 |
|
0.00% |
0 / 1 |
20.52 | |||
| originalAxisClips | |
91.67% |
11 / 12 |
|
0.00% |
0 / 1 |
9.05 | |||
| paintTableColumnBackgrounds | |
3.70% |
2 / 54 |
|
0.00% |
0 / 1 |
495.37 | |||
| cellBorderBoxRect | |
0.00% |
0 / 9 |
|
0.00% |
0 / 1 |
2 | |||
| collectTableCellsByColumn | |
0.00% |
0 / 9 |
|
0.00% |
0 / 1 |
42 | |||
| emitOverflowClipPath | |
100.00% |
29 / 29 |
|
100.00% |
1 / 1 |
14 | |||
| resolveClipRect | |
97.30% |
36 / 37 |
|
0.00% |
0 / 1 |
10 | |||
| maskHidesElement | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| buildBoxImageMaskGsName | |
82.98% |
78 / 94 |
|
0.00% |
0 / 1 |
23.17 | |||
| buildBoxSvgMaskGsName | |
85.37% |
35 / 41 |
|
0.00% |
0 / 1 |
16.80 | |||
| resolveMaskOrigin | |
83.33% |
5 / 6 |
|
0.00% |
0 / 1 |
3.04 | |||
| resolveMaskClip | |
75.00% |
6 / 8 |
|
0.00% |
0 / 1 |
4.25 | |||
| buildBoxGradientMaskGsName | |
91.30% |
42 / 46 |
|
0.00% |
0 / 1 |
14.13 | |||
| linearGradientLine | |
93.75% |
15 / 16 |
|
0.00% |
0 / 1 |
2.00 | |||
| applyClipPath | |
97.22% |
70 / 72 |
|
0.00% |
0 / 1 |
19 | |||
| applyReferencedClipPath | |
78.79% |
26 / 33 |
|
0.00% |
0 / 1 |
9.77 | |||
| hostSvgDocumentFor | |
75.00% |
12 / 16 |
|
0.00% |
0 / 1 |
9.00 | |||
| clipTranslator | |
100.00% |
3 / 3 |
|
100.00% |
1 / 1 |
2 | |||
| clipReferenceBox | |
100.00% |
27 / 27 |
|
100.00% |
1 / 1 |
5 | |||
| clipEdgePx | |
75.00% |
6 / 8 |
|
0.00% |
0 / 1 |
6.56 | |||
| isBackfaceHidden | |
85.00% |
17 / 20 |
|
0.00% |
0 / 1 |
8.22 | |||
| isVisibilityHidden | |
100.00% |
3 / 3 |
|
100.00% |
1 / 1 |
2 | |||
| paintBoxShadow | |
92.59% |
25 / 27 |
|
0.00% |
0 / 1 |
10.04 | |||
| paintInsetShadow | |
100.00% |
24 / 24 |
|
100.00% |
1 / 1 |
5 | |||
| paintFilterDropShadow | |
95.24% |
20 / 21 |
|
0.00% |
0 / 1 |
9 | |||
| collectDropShadowFilters | |
40.00% |
8 / 20 |
|
0.00% |
0 / 1 |
31.60 | |||
| parseDropShadowArgs | |
80.77% |
21 / 26 |
|
0.00% |
0 / 1 |
10.71 | |||
| collectShadowLayers | |
40.00% |
4 / 10 |
|
0.00% |
0 / 1 |
13.78 | |||
| parseShadowLayer | |
93.10% |
27 / 29 |
|
0.00% |
0 / 1 |
10.03 | |||
| resolveOpacityGsName | |
80.00% |
8 / 10 |
|
0.00% |
0 / 1 |
6.29 | |||
| paintListMarker | |
96.77% |
30 / 31 |
|
0.00% |
0 / 1 |
14 | |||
| formatCounterMarker | |
100.00% |
11 / 11 |
|
100.00% |
1 / 1 |
3 | |||
| listItemIndex | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| paintCounterMarker | |
90.00% |
27 / 30 |
|
0.00% |
0 / 1 |
5.03 | |||
| paintMarkerSquare | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
1 | |||
| paintMarkerCircle | |
100.00% |
14 / 14 |
|
100.00% |
1 / 1 |
2 | |||
| dominantFontSize | |
75.00% |
3 / 4 |
|
0.00% |
0 / 1 |
2.06 | |||
| paintLineBoxes | |
100.00% |
19 / 19 |
|
100.00% |
1 / 1 |
7 | |||
| paintInlineBackgrounds | |
94.74% |
36 / 38 |
|
0.00% |
0 / 1 |
15.03 | |||
| collectTextShadowLayers | |
92.31% |
24 / 26 |
|
0.00% |
0 / 1 |
12.07 | |||
| paintLine | |
93.33% |
14 / 15 |
|
0.00% |
0 / 1 |
4.00 | |||
| decorationSkipSpaces | |
42.86% |
3 / 7 |
|
0.00% |
0 / 1 |
9.66 | |||
| paintTextDecorations | |
89.29% |
50 / 56 |
|
0.00% |
0 / 1 |
25.77 | |||
| emitDecorationStyled | |
53.33% |
16 / 30 |
|
0.00% |
0 / 1 |
14.50 | |||
| emitWavyDecoration | |
96.77% |
30 / 31 |
|
0.00% |
0 / 1 |
5 | |||
| resolveDecorationThickness | |
100.00% |
6 / 6 |
|
100.00% |
1 / 1 |
3 | |||
| resolveUnderlineOffset | |
83.33% |
5 / 6 |
|
0.00% |
0 / 1 |
3.04 | |||
| textDecorationStyle | |
83.33% |
5 / 6 |
|
0.00% |
0 / 1 |
3.04 | |||
| textDecorationLines | |
85.71% |
12 / 14 |
|
0.00% |
0 / 1 |
8.19 | |||
| textDecorationColor | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
2 | |||
| paintFragment | |
97.33% |
73 / 75 |
|
0.00% |
0 / 1 |
17 | |||
| collectBlockLinkRect | |
36.00% |
9 / 25 |
|
0.00% |
0 / 1 |
36.21 | |||
| snapKern | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
2 | |||
| paintBackground | |
100.00% |
129 / 129 |
|
100.00% |
1 / 1 |
32 | |||
| extractBackgroundLayers | |
40.00% |
4 / 10 |
|
0.00% |
0 / 1 |
13.78 | |||
| resolveBackgroundLayer | |
100.00% |
12 / 12 |
|
100.00% |
1 / 1 |
9 | |||
| selectImageSetOption | |
84.62% |
11 / 13 |
|
0.00% |
0 / 1 |
8.23 | |||
| isSupportedImageSetMimeType | |
0.00% |
0 / 5 |
|
0.00% |
0 / 1 |
2 | |||
| imageFunctionColorArg | |
63.64% |
7 / 11 |
|
0.00% |
0 / 1 |
11.08 | |||
| paintColorImage | |
84.62% |
22 / 26 |
|
0.00% |
0 / 1 |
9.29 | |||
| extractCommaList | |
66.67% |
4 / 6 |
|
0.00% |
0 / 1 |
4.59 | |||
| paintConicGradient | |
77.14% |
27 / 35 |
|
0.00% |
0 / 1 |
9.97 | |||
| paintRadialGradient | |
83.93% |
47 / 56 |
|
0.00% |
0 / 1 |
17.06 | |||
| fillGradientSolidStop | |
87.50% |
7 / 8 |
|
0.00% |
0 / 1 |
3.02 | |||
| resolveGradientStops | |
97.67% |
42 / 43 |
|
0.00% |
0 / 1 |
18 | |||
| flattenGradientStops | |
100.00% |
24 / 24 |
|
100.00% |
1 / 1 |
8 | |||
| interpolationSpaceNeedsResample | |
100.00% |
5 / 5 |
|
100.00% |
1 / 1 |
3 | |||
| gradientSampleSteps | |
75.00% |
6 / 8 |
|
0.00% |
0 / 1 |
7.77 | |||
| gradientHasAlpha | |
100.00% |
4 / 4 |
|
100.00% |
1 / 1 |
3 | |||
| alphaStopsFrom | |
100.00% |
4 / 4 |
|
100.00% |
1 / 1 |
2 | |||
| buildGradientAlphaMaskState | |
85.00% |
17 / 20 |
|
0.00% |
0 / 1 |
5.08 | |||
| resolveRepeatingLinearCycle | |
65.91% |
29 / 44 |
|
0.00% |
0 / 1 |
26.14 | |||
| buildRepeatingLinearAxis | |
91.89% |
34 / 37 |
|
0.00% |
0 / 1 |
8.03 | |||
| paintLinearGradient | |
94.57% |
87 / 92 |
|
0.00% |
0 / 1 |
14.03 | |||
| paintBackgroundImage | |
87.76% |
43 / 49 |
|
0.00% |
0 / 1 |
9.15 | |||
| drawImageTilesInto | |
93.75% |
60 / 64 |
|
0.00% |
0 / 1 |
12.04 | |||
| repeatAxes | |
100.00% |
5 / 5 |
|
100.00% |
1 / 1 |
1 | |||
| repeatModes | |
59.09% |
13 / 22 |
|
0.00% |
0 / 1 |
27.42 | |||
| roundTileDim | |
50.00% |
2 / 4 |
|
0.00% |
0 / 1 |
6.00 | |||
| tileOffsets | |
88.24% |
15 / 17 |
|
0.00% |
0 / 1 |
9.13 | |||
| resolveBackgroundPosition | |
90.20% |
46 / 51 |
|
0.00% |
0 / 1 |
19.34 | |||
| resolveEdgeOffsetPosition | |
62.22% |
28 / 45 |
|
0.00% |
0 / 1 |
62.45 | |||
| isHorizontalPositionKeyword | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
2 | |||
| isVerticalPositionKeyword | |
100.00% |
2 / 2 |
|
100.00% |
1 / 1 |
2 | |||
| axisOffsetFromValue | |
89.47% |
17 / 19 |
|
0.00% |
0 / 1 |
12.17 | |||
| resolveBackgroundSize | |
69.62% |
55 / 79 |
|
0.00% |
0 / 1 |
35.57 | |||
| backgroundSizeAxisLength | |
40.00% |
2 / 5 |
|
0.00% |
0 / 1 |
4.94 | |||
| isDefaultGradientSize | |
86.67% |
13 / 15 |
|
0.00% |
0 / 1 |
9.19 | |||
| paintTiledLinearGradient | |
100.00% |
7 / 7 |
|
100.00% |
1 / 1 |
3 | |||
| gradientTileCells | |
88.57% |
31 / 35 |
|
0.00% |
0 / 1 |
11.18 | |||
| resolveGradientTileSize | |
73.68% |
14 / 19 |
|
0.00% |
0 / 1 |
11.82 | |||
| resolveAutoSizePair | |
45.45% |
10 / 22 |
|
0.00% |
0 / 1 |
35.37 | |||
| intrinsicSizePartial | |
22.22% |
4 / 18 |
|
0.00% |
0 / 1 |
57.05 | |||
| intrinsicSize | |
71.43% |
15 / 21 |
|
0.00% |
0 / 1 |
12.33 | |||
| isSvgSrc | |
100.00% |
6 / 6 |
|
100.00% |
1 / 1 |
4 | |||
| loadSvgDocument | |
72.22% |
13 / 18 |
|
0.00% |
0 / 1 |
9.37 | |||
| decodeSvgDataUri | |
57.14% |
4 / 7 |
|
0.00% |
0 / 1 |
5.26 | |||
| intrinsicSvgSize | |
52.94% |
9 / 17 |
|
0.00% |
0 / 1 |
51.77 | |||
| parseSvgLengthAttribute | |
62.50% |
5 / 8 |
|
0.00% |
0 / 1 |
4.84 | |||
| paintBorderImage | |
93.75% |
150 / 160 |
|
0.00% |
0 / 1 |
40.39 | |||
| emitImageMiddleFill | |
92.86% |
26 / 28 |
|
0.00% |
0 / 1 |
11.04 | |||
| borderImageFillAxis | |
8.33% |
2 / 24 |
|
0.00% |
0 / 1 |
104.20 | |||
| borderImageSliceHasFill | |
87.50% |
7 / 8 |
|
0.00% |
0 / 1 |
6.07 | |||
| emitImageSlice | |
100.00% |
15 / 15 |
|
100.00% |
1 / 1 |
5 | |||
| emitImageEdge | |
70.59% |
24 / 34 |
|
0.00% |
0 / 1 |
22.51 | |||
| parseBorderImageSliceNumber | |
37.50% |
3 / 8 |
|
0.00% |
0 / 1 |
14.79 | |||
| resolveBorderImageSliceComponent | |
66.67% |
2 / 3 |
|
0.00% |
0 / 1 |
2.15 | |||
| resolveBorderImageSliceSides | |
82.14% |
23 / 28 |
|
0.00% |
0 / 1 |
13.96 | |||
| resolveBorderImageWidth | |
82.50% |
33 / 40 |
|
0.00% |
0 / 1 |
13.91 | |||
| resolveBorderImageOutset | |
84.62% |
22 / 26 |
|
0.00% |
0 / 1 |
7.18 | |||
| parseBorderImageRepeatModes | |
64.29% |
9 / 14 |
|
0.00% |
0 / 1 |
10.92 | |||
| svgRenderer | |
90.00% |
9 / 10 |
|
0.00% |
0 / 1 |
3.01 | |||
| documentFontBridge | |
33.33% |
2 / 6 |
|
0.00% |
0 / 1 |
5.67 | |||
| inlineSvgAdapter | |
100.00% |
3 / 3 |
|
100.00% |
1 / 1 |
2 | |||
| inlineMathmlAdapter | |
100.00% |
3 / 3 |
|
100.00% |
1 / 1 |
2 | |||
| mathmlRenderer | |
75.00% |
3 / 4 |
|
0.00% |
0 / 1 |
3.14 | |||
| mathFontDataFor | |
63.64% |
14 / 22 |
|
0.00% |
0 / 1 |
18.92 | |||
| mathmlRendererFor | |
88.89% |
8 / 9 |
|
0.00% |
0 / 1 |
3.01 | |||
| paintInlineMath | |
79.55% |
35 / 44 |
|
0.00% |
0 / 1 |
18.19 | |||
| resolveInlineAbsoluteOrigin | |
33.33% |
5 / 15 |
|
0.00% |
0 / 1 |
16.67 | |||
| paintImgSvg | |
65.79% |
25 / 38 |
|
0.00% |
0 / 1 |
14.00 | |||
| paintInlineSvg | |
86.96% |
40 / 46 |
|
0.00% |
0 / 1 |
21.98 | |||
| parseViewBox | |
84.62% |
11 / 13 |
|
0.00% |
0 / 1 |
8.23 | |||
| parseSvgLength | |
0.00% |
0 / 10 |
|
0.00% |
0 / 1 |
42 | |||
| paintBorders | |
80.88% |
55 / 68 |
|
0.00% |
0 / 1 |
14.18 | |||
| paintBorderSide | |
100.00% |
28 / 28 |
|
100.00% |
1 / 1 |
11 | |||
| paintDashedDottedSide | |
95.12% |
39 / 41 |
|
0.00% |
0 / 1 |
6 | |||
| dashedSideEndpoints | |
100.00% |
7 / 7 |
|
100.00% |
1 / 1 |
2 | |||
| resolve3dBorderColor | |
100.00% |
19 / 19 |
|
100.00% |
1 / 1 |
11 | |||
| borderStyleName | |
75.00% |
3 / 4 |
|
0.00% |
0 / 1 |
2.06 | |||
| bordersAreUniform | |
61.54% |
8 / 13 |
|
0.00% |
0 / 1 |
13.61 | |||
| emitRoundedStroke | |
0.00% |
0 / 52 |
|
0.00% |
0 / 1 |
30 | |||
| paintOutline | |
86.81% |
79 / 91 |
|
0.00% |
0 / 1 |
28.67 | |||
| paintColumnRules | |
81.82% |
27 / 33 |
|
0.00% |
0 / 1 |
11.73 | |||
| paintFragmentedColumns | |
0.00% |
0 / 45 |
|
0.00% |
0 / 1 |
132 | |||
| paintColumnRuns | |
0.00% |
0 / 19 |
|
0.00% |
0 / 1 |
72 | |||
| paintSlicedColumnRun | |
0.00% |
0 / 21 |
|
0.00% |
0 / 1 |
56 | |||
| paintGridGapRules | |
70.37% |
19 / 27 |
|
0.00% |
0 / 1 |
5.65 | |||
| paintFlexGapRules | |
70.37% |
19 / 27 |
|
0.00% |
0 / 1 |
5.65 | |||
| strokeGapRule | |
90.00% |
27 / 30 |
|
0.00% |
0 / 1 |
11.12 | |||
| ruleColor | |
42.86% |
3 / 7 |
|
0.00% |
0 / 1 |
4.68 | |||
| borderIsVisible | |
85.71% |
6 / 7 |
|
0.00% |
0 / 1 |
4.05 | |||
| borderColor | |
85.71% |
6 / 7 |
|
0.00% |
0 / 1 |
3.03 | |||
| emitRect | |
77.78% |
7 / 9 |
|
0.00% |
0 / 1 |
3.10 | |||
| borderRadii | |
100.00% |
10 / 10 |
|
100.00% |
1 / 1 |
2 | |||
| borderRadiiXY | |
70.00% |
14 / 20 |
|
0.00% |
0 / 1 |
3.24 | |||
| resolveRadiusComponent | |
80.00% |
4 / 5 |
|
0.00% |
0 / 1 |
3.07 | |||
| radiiAnyPositive | |
100.00% |
4 / 4 |
|
100.00% |
1 / 1 |
4 | |||
| emitRoundedFill | |
100.00% |
5 / 5 |
|
100.00% |
1 / 1 |
1 | |||
| buildRoundedRectPath | |
100.00% |
57 / 57 |
|
100.00% |
1 / 1 |
1 | |||
| emitCornerSegment | |
62.16% |
23 / 37 |
|
0.00% |
0 / 1 |
15.42 | |||
| cornerShapes | |
69.23% |
9 / 13 |
|
0.00% |
0 / 1 |
11.36 | |||
| cornerShapeName | |
60.00% |
9 / 15 |
|
0.00% |
0 / 1 |
18.74 | |||
| superellipseExponent | |
27.27% |
3 / 11 |
|
0.00% |
0 / 1 |
25.85 | |||
| reduceRadiiToBox | |
100.00% |
18 / 18 |
|
100.00% |
1 / 1 |
4 | |||
| isCollapsedBorderCell | |
100.00% |
5 / 5 |
|
100.00% |
1 / 1 |
3 | |||
| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\HtmlToPdf\Painter; |
| 6 | |
| 7 | use Phpdftk\Css\Cascade\WritingMode; |
| 8 | use Phpdftk\Css\Value\Color; |
| 9 | use Phpdftk\Css\Value\ColorConverter; |
| 10 | use Phpdftk\Css\Value\ColorSpace; |
| 11 | use Phpdftk\Css\Value\HueInterpolation; |
| 12 | use Phpdftk\Css\Value\Keyword; |
| 13 | use Phpdftk\HtmlToPdf\Box\Box; |
| 14 | use Phpdftk\HtmlToPdf\Layout\BoxGeometry; |
| 15 | use Phpdftk\HtmlToPdf\Layout\InlineFragment; |
| 16 | use Phpdftk\HtmlToPdf\Layout\LineBox; |
| 17 | use Phpdftk\HtmlToPdf\Layout\MultiColumnLayout; |
| 18 | use Phpdftk\Pdf\Core\Content\ContentStream; |
| 19 | use Phpdftk\Pdf\Core\Font\RegisteredFont; |
| 20 | use Phpdftk\Pdf\Writer\Font as WriterFont; |
| 21 | use Phpdftk\Pdf\Writer\Page as WriterPage; |
| 22 | use Phpdftk\Pdf\Writer\PdfWriter; |
| 23 | use Phpdftk\ResourceLoader\Exception\FetchFailedException; |
| 24 | use Phpdftk\ResourceLoader\Exception\SsrfBlockedException; |
| 25 | use Phpdftk\ResourceLoader\ResourceLoader as HttpResourceLoader; |
| 26 | |
| 27 | /** |
| 28 | * Phase 1G — paints a laid-out box tree onto a {@see ContentStream}. |
| 29 | * |
| 30 | * The painter walks the box tree depth-first and emits PDF operators for |
| 31 | * each box's visual contributions: background colour (rect + fill), then |
| 32 | * border edges (four straight strokes one per side, honouring per-side |
| 33 | * widths and colours), then recurses into children. Text rendering uses |
| 34 | * the line-box / shaped-glyph data deposited by {@see InlineLayout}; |
| 35 | * Phase 1G.1 ships background + border painting and leaves text as a |
| 36 | * follow-up that depends on `@font-face` integration (1M) — for now line |
| 37 | * boxes are walked but text painting is a no-op, so the painter exercises |
| 38 | * end-to-end without requiring a font registration. |
| 39 | * |
| 40 | * **Coordinate-system flip**: the layout uses PDF user-space units but |
| 41 | * with Y growing downward from the top of the page (the convention of CSS |
| 42 | * and every other layout engine). PDF's native content-stream coordinates |
| 43 | * grow upward from the bottom. The painter flips Y when emitting |
| 44 | * rectangles so consumers see PDF-correct output; the underlying box |
| 45 | * geometry stays in top-down space for layout sanity. |
| 46 | */ |
| 47 | final class Painter |
| 48 | { |
| 49 | public function __construct( |
| 50 | private readonly float $pageHeight, |
| 51 | private readonly ?RegisteredFont $defaultFont = null, |
| 52 | private readonly ?WriterPage $page = null, |
| 53 | /** |
| 54 | * Layout-Y range this page covers. When set, the painter skips |
| 55 | * any box whose geometry sits entirely above or entirely below |
| 56 | * this range — a multi-page document no longer re-paints every |
| 57 | * box on every page, just the ones intersecting the current |
| 58 | * page slot. |
| 59 | */ |
| 60 | private readonly ?float $pageRangeStart = null, |
| 61 | private readonly ?float $pageRangeEnd = null, |
| 62 | /** |
| 63 | * When set, the painter can register Image XObjects via the |
| 64 | * writer's `addImage` and emit `Do` for `<img>` elements whose |
| 65 | * `src` is a `data:image/{png,jpeg}` URL. When null, image |
| 66 | * painting is a no-op (the alt-text fallback still flows). |
| 67 | */ |
| 68 | private readonly ?PdfWriter $writer = null, |
| 69 | /** |
| 70 | * Base directory for resolving relative `<img src>` paths against |
| 71 | * the filesystem. When null, only `data:` URLs paint. |
| 72 | */ |
| 73 | private readonly ?string $baseDir = null, |
| 74 | /** |
| 75 | * Optional broader sandbox the resolved path must remain |
| 76 | * under. Defaults to `baseDir`. Set wider when relative |
| 77 | * URLs are expected to escape `baseDir` via `..` walks — |
| 78 | * e.g. WPT refs in `reference/` loading `../support/img.png`. |
| 79 | */ |
| 80 | private readonly ?string $sandboxRoot = null, |
| 81 | /** |
| 82 | * Map of `postScriptName → RegisteredFont` keyed by the font's |
| 83 | * raw PS name. Used to switch `Tf` per fragment when an inline |
| 84 | * subtree shaped against an alternate font from the `FontResolver`. |
| 85 | * Defaults to `[$defaultFont->postScriptName => $defaultFont]` |
| 86 | * when only the default is registered. |
| 87 | * |
| 88 | * @var array<string, RegisteredFont> |
| 89 | */ |
| 90 | private readonly array $registeredFonts = [], |
| 91 | /** |
| 92 | * Map of `lowercase font-family → OpenTypeData`. Parallel to |
| 93 | * `$registeredFonts` (which carries PDF-side handles); this |
| 94 | * carries the parsed-font side so inline foreign-content |
| 95 | * painters can hand the full font data to embedded |
| 96 | * renderers (e.g. paintInlineMath threads the math element's |
| 97 | * resolved font into MathmlRenderer so it picks up the |
| 98 | * font's MATH-table constants like FractionRuleThickness). |
| 99 | * |
| 100 | * Keyed by lowercase family name to match how Renderer |
| 101 | * builds its `$fontMap` from @font-face and |
| 102 | * RendererOptions::fontMap. |
| 103 | * |
| 104 | * @var array<string, \Phpdftk\FontParser\FontFaceData> |
| 105 | */ |
| 106 | private readonly array $fontDataByFamily = [], |
| 107 | /** |
| 108 | * Page width in PDF user-space units. Used by per-axis |
| 109 | * `overflow-x` / `overflow-y` clipping to extend the clip |
| 110 | * rect across the unconstrained axis. Defaults to a value |
| 111 | * large enough that any reasonable page-width effectively |
| 112 | * disables horizontal clipping when only the Y axis clips. |
| 113 | */ |
| 114 | private readonly float $pageWidth = 100000.0, |
| 115 | /** |
| 116 | * Optional `phpdftk/resource-loader` for `http(s)://` |
| 117 | * `<img src>`, `<picture><source>`, `<iframe src>` etc. |
| 118 | * hrefs. When null (the default — preserves existing |
| 119 | * behaviour byte-for-byte), network hrefs drop silently per |
| 120 | * the same SVG 2 §12.6 / image-loading no-image outcome |
| 121 | * pattern. When supplied, the loader runs (with its SSRF |
| 122 | * guard, redirect handling, body cap, and MIME sniffing) |
| 123 | * and the embedded bytes get materialised to a temp file |
| 124 | * the same way `data:` URLs do. |
| 125 | */ |
| 126 | private readonly ?HttpResourceLoader $resourceLoader = null, |
| 127 | /** |
| 128 | * The document's CSS Fonts 4 matcher. Threaded in so embedded |
| 129 | * foreign content that does its own text painting - inline |
| 130 | * `<svg><text>`, SVG `background-image` - selects from the same |
| 131 | * face set as HTML text instead of falling back to its own |
| 132 | * standalone font mapping. Null leaves those painters on their |
| 133 | * built-in fallbacks. |
| 134 | */ |
| 135 | private readonly ?\Phpdftk\HtmlToPdf\Layout\FontResolver $fontResolver = null, |
| 136 | ) {} |
| 137 | |
| 138 | /** |
| 139 | * Track tempfile paths created for `data:` URL images so we can |
| 140 | * delete them when the Painter is destroyed. |
| 141 | * |
| 142 | * @var list<string> |
| 143 | */ |
| 144 | private array $tempImagePaths = []; |
| 145 | |
| 146 | /** |
| 147 | * Cache `data:` URL → registered XObject resource name for the |
| 148 | * current page, so the same image used multiple times only spills |
| 149 | * + registers once. |
| 150 | * |
| 151 | * @var array<string, string> |
| 152 | */ |
| 153 | private array $imageNameCache = []; |
| 154 | |
| 155 | /** |
| 156 | * Cache `src` → parsed SvgDocument (or `false` when parsing failed) |
| 157 | * so each unique SVG background-image is only read + parsed once. |
| 158 | * |
| 159 | * @var array<string, \Phpdftk\Svg\SvgDocument|false> |
| 160 | */ |
| 161 | private array $svgDocumentCache = []; |
| 162 | |
| 163 | /** |
| 164 | * Lazy-built SvgRenderer for SVG background-image painting. SVG |
| 165 | * resources (gradients, fonts) register on the page on first draw. |
| 166 | */ |
| 167 | private ?\Phpdftk\SvgToPdf\SvgRenderer $svgRenderer = null; |
| 168 | |
| 169 | /** |
| 170 | * Translator used to emit `clip-path: url(#id)` regions. Separate |
| 171 | * from {@see svgRenderer}'s translator — see {@see clipTranslator}. |
| 172 | */ |
| 173 | private ?\Phpdftk\SvgToPdf\Translator $clipTranslator = null; |
| 174 | |
| 175 | /** |
| 176 | * Lazy-built adapter that converts an inline-SVG HTML DOM subtree |
| 177 | * into a typed SvgDocument the renderer can paint. Caches its |
| 178 | * results by element identity so a multi-page document only pays |
| 179 | * the parse cost once per inline SVG. |
| 180 | */ |
| 181 | private ?\Phpdftk\HtmlToPdf\Svg\InlineSvgAdapter $inlineSvgAdapter = null; |
| 182 | |
| 183 | /** |
| 184 | * Sibling of $inlineSvgAdapter for MathML. Both adapters share |
| 185 | * {@see \Phpdftk\HtmlToPdf\ForeignContent\DomXmlSerializer} but |
| 186 | * keep their own caches so a fixture with both inline SVG and |
| 187 | * inline MathML doesn't conflate them. |
| 188 | */ |
| 189 | private ?\Phpdftk\HtmlToPdf\Mathml\InlineMathmlAdapter $inlineMathmlAdapter = null; |
| 190 | |
| 191 | /** |
| 192 | * Lazy-built MathML renderer. Same lifecycle as $svgRenderer — |
| 193 | * holds a reference to the writer + page once, registers the |
| 194 | * standard fonts on first draw. |
| 195 | */ |
| 196 | private ?\Phpdftk\MathmlToPdf\MathmlRenderer $mathmlRenderer = null; |
| 197 | |
| 198 | public function __destruct() |
| 199 | { |
| 200 | foreach ($this->tempImagePaths as $path) { |
| 201 | if (is_file($path)) { |
| 202 | @unlink($path); |
| 203 | } |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * Link rects in PDF coordinates collected during the most recent |
| 209 | * {@see paint()} call. Each entry is `{href, llx, lly, urx, ury, |
| 210 | * title}` with the Y-flip already applied. The Renderer reads this |
| 211 | * list to register `/Link` annotations on the current page. |
| 212 | * |
| 213 | * @var list<array{href: string, llx: float, lly: float, urx: float, ury: float, title: ?string}> |
| 214 | */ |
| 215 | public array $collectedLinks = []; |
| 216 | |
| 217 | /** |
| 218 | * Box whose background was propagated to the canvas this paint |
| 219 | * pass (CSS Backgrounds 3 §3.11.2) — either the root or, when the |
| 220 | * root's background is transparent and the root is an HTML |
| 221 | * document, the first body child. `paintBackground` skips this box |
| 222 | * to avoid double-painting at the box's geometry. |
| 223 | */ |
| 224 | private ?Box $propagatedBgBox = null; |
| 225 | |
| 226 | /** |
| 227 | * Body box whose `overflow` propagated to the root canvas this |
| 228 | * paint pass (CSS Overflow 3 §3.3). When the root's overflow is |
| 229 | * `visible` and the body's isn't, the body's value propagates to |
| 230 | * the root and the body's OWN overflow is treated as `visible` |
| 231 | * for paint purposes. `shouldOverflowClip` suppresses the body's |
| 232 | * descendant clip so the test/ref pair (which sets the |
| 233 | * post-propagation state on `html` directly) renders identically. |
| 234 | */ |
| 235 | private ?Box $propagatedOverflowBox = null; |
| 236 | |
| 237 | /** |
| 238 | * Root box that received the propagated overflow this paint pass. |
| 239 | * `axisClips` consults this to apply the body's overflow keyword |
| 240 | * to the root (instead of the root's own visible default) so the |
| 241 | * canvas gets the spec-mandated post-propagation behaviour. |
| 242 | */ |
| 243 | private ?Box $propagatedOverflowRoot = null; |
| 244 | |
| 245 | public function paint(Box $root, ContentStream $stream): void |
| 246 | { |
| 247 | $this->collectedLinks = []; |
| 248 | $this->imageNameCache = []; |
| 249 | // CSS Backgrounds 3 §3.11.2 — if the root has a non-transparent |
| 250 | // background, paint the entire canvas with it BEFORE walking the |
| 251 | // tree (so descendants paint on top). When the root is |
| 252 | // transparent but its body child carries a background, the body |
| 253 | // propagates to the canvas instead. The propagated box's own |
| 254 | // paint-background pass is suppressed by the propagatedBgBox check. |
| 255 | $this->paintCanvasBackgroundFromRoot($root, $stream); |
| 256 | // CSS Overflow 3 §3.3 — overflow propagation. When the root's |
| 257 | // overflow is `visible` and the body's isn't, the body's |
| 258 | // overflow value propagates to the root and the body's own |
| 259 | // overflow becomes `visible`. Both sides matter: we suppress |
| 260 | // the body's descendant clip AND apply the body's overflow |
| 261 | // keyword to the root so the root clips at its content area |
| 262 | // (which in our auto-height renderer wraps the body's outer |
| 263 | // box). `shouldOverflowClip` / `axisClips` consult the |
| 264 | // propagated-* tracking to redirect the per-axis clip. |
| 265 | $this->resolveOverflowPropagation($root); |
| 266 | $this->paintBox($root, $stream); |
| 267 | $this->propagatedBgBox = null; |
| 268 | $this->propagatedOverflowBox = null; |
| 269 | $this->propagatedOverflowRoot = null; |
| 270 | } |
| 271 | |
| 272 | private function resolveOverflowPropagation(Box $root): void |
| 273 | { |
| 274 | if ($this->boxIsPaintContained($root)) { |
| 275 | return; |
| 276 | } |
| 277 | if (!$this->boxOverflowIsVisible($root)) { |
| 278 | // Root itself constrains — no propagation per spec; the |
| 279 | // root's overflow applies at the root and the body's |
| 280 | // overflow applies at the body normally. |
| 281 | return; |
| 282 | } |
| 283 | $body = $this->findBodyChild($root); |
| 284 | if ($body === null || $this->boxIsPaintContained($body)) { |
| 285 | return; |
| 286 | } |
| 287 | if (!$this->boxOverflowIsVisible($body)) { |
| 288 | $this->propagatedOverflowBox = $body; |
| 289 | $this->propagatedOverflowRoot = $root; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | private function boxOverflowIsVisible(Box $box): bool |
| 294 | { |
| 295 | return !$this->axisClips($box, 'x') && !$this->axisClips($box, 'y'); |
| 296 | } |
| 297 | |
| 298 | private function paintCanvasBackgroundFromRoot(Box $root, ContentStream $stream): void |
| 299 | { |
| 300 | $source = $root; |
| 301 | // CSS Containment 3 §4.4 — `contain: paint` (or `contain: |
| 302 | // layout`, which implies paint containment in the propagation |
| 303 | // sense) on the root element creates a stacking + paint |
| 304 | // boundary, so neither the root's nor the body's background |
| 305 | // propagates to the canvas. Bail out before doing any canvas |
| 306 | // paint when the root is paint-contained. |
| 307 | if ($this->boxIsPaintContained($source)) { |
| 308 | return; |
| 309 | } |
| 310 | if (!$this->boxHasPaintableBackground($source)) { |
| 311 | // CSS Backgrounds 3 §3.11.2 second paragraph — when the root |
| 312 | // element of an HTML/XHTML document has a transparent |
| 313 | // background, the canvas uses the *first body child's* |
| 314 | // background instead, and the body itself paints |
| 315 | // transparent. Skipping the body lookup for non-HTML root |
| 316 | // elements is harmless: only HTML structure has a `<body>`. |
| 317 | $body = $this->findBodyChild($root); |
| 318 | if ($body === null |
| 319 | || !$this->boxHasPaintableBackground($body) |
| 320 | // CSS Containment 3 §4.4 — a paint-contained body does |
| 321 | // not propagate either. The body's bg paints at the |
| 322 | // body's own geometry, and the canvas stays at the |
| 323 | // initial value (transparent). |
| 324 | || $this->boxIsPaintContained($body) |
| 325 | ) { |
| 326 | return; |
| 327 | } |
| 328 | $source = $body; |
| 329 | } |
| 330 | $this->propagatedBgBox = $source; |
| 331 | // CSS Masking 1 §6 / Compositing 1 §5.2 — a `clip-path` on the |
| 332 | // ROOT element clips the root group, and the background the root |
| 333 | // propagates to the canvas is painted inside that group. Without |
| 334 | // this the element's own paint is clipped while the propagated |
| 335 | // background floods the whole page unclipped. The clip comes from |
| 336 | // the ROOT box even when the background itself was propagated up |
| 337 | // from the body: it is the root's group that carries it. |
| 338 | $canvasClipped = $this->applyClipPath($root, $stream); |
| 339 | $color = $this->resolveColorWithCurrentColor( |
| 340 | $source->style->get('background-color'), |
| 341 | $source, |
| 342 | ); |
| 343 | $bgImage = $source->style->get('background-image'); |
| 344 | $hasColor = $color instanceof Color && $color->a > 0.0; |
| 345 | $hasImage = $bgImage instanceof \Phpdftk\Css\Value\Url; |
| 346 | $hasGradient = $bgImage instanceof \Phpdftk\Css\Value\LinearGradient; |
| 347 | $hasRadial = $bgImage instanceof \Phpdftk\Css\Value\RadialGradient; |
| 348 | // The canvas rect is the entire page in PDF user-space — the |
| 349 | // painter's `pageHeight` is the top, `pageWidth` the right edge. |
| 350 | // Layout-Y 0 corresponds to the page top; emitRect handles the |
| 351 | // CSS-to-PDF Y flip internally. |
| 352 | if ($hasColor) { |
| 353 | $this->emitRect($stream, 0.0, 0.0, $this->pageWidth, $this->pageHeight, fill: $color); |
| 354 | } |
| 355 | if ($hasImage) { |
| 356 | $sizeValue = $source->style->get('background-size'); |
| 357 | $positionValue = $source->style->get('background-position'); |
| 358 | $repeatValue = $source->style->get('background-repeat'); |
| 359 | // CSS 2.1 §14.2 / Backgrounds 3 §3.11.2 — a propagated root |
| 360 | // background PAINTS over the whole canvas but is POSITIONED / |
| 361 | // tiled as if painted for the source element's own box (its |
| 362 | // padding box, the default `background-origin`). So the image |
| 363 | // anchors at the element's margin offset, not the page corner |
| 364 | // (e.g. `repeat-x top left` on an `html` with `margin: 1in` |
| 365 | // puts the stripe 1in down, not at y=0). |
| 366 | $this->paintBackgroundImage( |
| 367 | $bgImage, |
| 368 | $stream, |
| 369 | 0.0, |
| 370 | 0.0, |
| 371 | $this->pageWidth, |
| 372 | $this->pageHeight, |
| 373 | $sizeValue, |
| 374 | $positionValue, |
| 375 | $repeatValue, |
| 376 | $this->propagatedOriginRect($source), |
| 377 | ); |
| 378 | } |
| 379 | if ($hasGradient) { |
| 380 | $this->paintLinearGradient($bgImage, $stream, 0.0, 0.0, $this->pageWidth, $this->pageHeight); |
| 381 | } |
| 382 | if ($hasRadial) { |
| 383 | $this->paintRadialGradient($bgImage, $stream, 0.0, 0.0, $this->pageWidth, $this->pageHeight); |
| 384 | } |
| 385 | if ($bgImage instanceof \Phpdftk\Css\Value\ConicGradient) { |
| 386 | $this->paintConicGradient($bgImage, $stream, 0.0, 0.0, $this->pageWidth, $this->pageHeight); |
| 387 | } |
| 388 | if ($canvasClipped) { |
| 389 | $stream->restoreGraphicsState(); |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | /** |
| 394 | * The background positioning area for a propagated root/body |
| 395 | * background: the source element's padding box (the default |
| 396 | * `background-origin`), in layout-Y coordinates. `paintBackgroundImage` |
| 397 | * anchors `background-position` / tiling to this rect while painting |
| 398 | * over the whole canvas. |
| 399 | * |
| 400 | * @return array{x: float, top: float, width: float, height: float} |
| 401 | */ |
| 402 | private function propagatedOriginRect(Box $source): array |
| 403 | { |
| 404 | $g = $source->geometry; |
| 405 | return [ |
| 406 | 'x' => $g->x - $g->paddingLeft, |
| 407 | 'top' => $g->y - $g->paddingTop, |
| 408 | 'width' => $g->paddingLeft + $g->width + $g->paddingRight, |
| 409 | 'height' => $g->paddingTop + $g->height + $g->paddingBottom, |
| 410 | ]; |
| 411 | } |
| 412 | |
| 413 | private function boxHasPaintableBackground(Box $box): bool |
| 414 | { |
| 415 | $color = $this->resolveColorWithCurrentColor( |
| 416 | $box->style->get('background-color'), |
| 417 | $box, |
| 418 | ); |
| 419 | $bgImage = $box->style->get('background-image'); |
| 420 | if ($color instanceof Color && $color->a > 0.0) { |
| 421 | return true; |
| 422 | } |
| 423 | // Any recognised background-image layer (url, gradient, image(), |
| 424 | // or an image-set() wrapping one) makes the background paintable. |
| 425 | // Delegating to extractBackgroundLayers keeps this in lockstep with |
| 426 | // what the paint loop will actually draw. |
| 427 | return $this->extractBackgroundLayers($bgImage) !== []; |
| 428 | } |
| 429 | |
| 430 | /** |
| 431 | * If `$value` is the `currentcolor` keyword, resolve it against |
| 432 | * the box's `color` property per CSS Color 3 §3.2 / CSS Color 4 |
| 433 | * §3.6. Other values (already-typed `Color`, `null`, other |
| 434 | * keywords) pass through unchanged. The painter calls this at |
| 435 | * any property that documents `currentcolor` as a valid value |
| 436 | * (`background-color`, `border-*-color` initials, etc.). |
| 437 | */ |
| 438 | private function resolveColorWithCurrentColor(?\Phpdftk\Css\Value\Value $value, Box $box): ?\Phpdftk\Css\Value\Value |
| 439 | { |
| 440 | // CSS Color 5 §5 — `light-dark(<light>, <dark>)` picks the |
| 441 | // arm matching the using element's `color-scheme`. Inspect the |
| 442 | // box's resolved `color-scheme` to decide: when the cascaded |
| 443 | // value lists `dark` (e.g. `color-scheme: dark` or `color- |
| 444 | // scheme: light dark` with dark first), pick the dark arm. |
| 445 | // Anything else (including the `normal` initial or |
| 446 | // `color-scheme: light`) falls back to the light arm — the |
| 447 | // spec's default. |
| 448 | if ($value instanceof \Phpdftk\Css\Value\LightDark) { |
| 449 | $value = $this->preferredLightDarkArm($box, $value); |
| 450 | } |
| 451 | if ($value instanceof \Phpdftk\Css\Value\Keyword |
| 452 | && strtolower($value->name) === 'currentcolor' |
| 453 | ) { |
| 454 | $current = $box->style->get('color'); |
| 455 | if ($current instanceof \Phpdftk\Css\Value\LightDark) { |
| 456 | $current = $this->preferredLightDarkArm($box, $current); |
| 457 | } |
| 458 | $value = $current instanceof Color ? $current : null; |
| 459 | } |
| 460 | if ($value instanceof \Phpdftk\Css\Value\RelativeColor) { |
| 461 | $value = $this->resolveRelativeColor($value, $box); |
| 462 | } |
| 463 | if ($value instanceof Color && $value->space !== \Phpdftk\Css\Value\ColorSpace::sRGB) { |
| 464 | // CSS Color 4 §17 — every wide-gamut / polar / Lab-family |
| 465 | // value stores its native components on the Color struct |
| 466 | // (`color(display-p3 …)` etc.). Convert to sRGB before the |
| 467 | // painter emits `rg` so PDF's DeviceRGB sees in-gamut |
| 468 | // values; out-of-gamut components clip at the boundary. |
| 469 | return \Phpdftk\Css\Value\ColorConverter::toSrgb($value); |
| 470 | } |
| 471 | return $value; |
| 472 | } |
| 473 | |
| 474 | /** |
| 475 | * Pick the appropriate arm of a `light-dark()` expression based on |
| 476 | * the box's resolved `color-scheme`. CSS Color 5 §5 — the spec |
| 477 | * default is the light arm; `color-scheme: dark` (or a list whose |
| 478 | * first preferred scheme is dark) selects the dark arm. |
| 479 | */ |
| 480 | private function preferredLightDarkArm(Box $box, \Phpdftk\Css\Value\LightDark $value): \Phpdftk\Css\Value\Value |
| 481 | { |
| 482 | $scheme = $box->style->get('color-scheme'); |
| 483 | $isDark = false; |
| 484 | if ($scheme instanceof \Phpdftk\Css\Value\Keyword |
| 485 | && strtolower($scheme->name) === 'dark' |
| 486 | ) { |
| 487 | $isDark = true; |
| 488 | } elseif ($scheme instanceof \Phpdftk\Css\Value\ValueList) { |
| 489 | foreach ($scheme->values as $entry) { |
| 490 | if (!$entry instanceof \Phpdftk\Css\Value\Keyword) { |
| 491 | continue; |
| 492 | } |
| 493 | $name = strtolower($entry->name); |
| 494 | if ($name === 'dark') { |
| 495 | $isDark = true; |
| 496 | break; |
| 497 | } |
| 498 | if ($name === 'light') { |
| 499 | break; |
| 500 | } |
| 501 | } |
| 502 | } |
| 503 | return $isDark ? $value->dark : $value->light; |
| 504 | } |
| 505 | |
| 506 | /** |
| 507 | * CSS Color 5 §4 relative-color resolution. Returns the resolved |
| 508 | * Color or null when the relative-color expression can't be |
| 509 | * statically evaluated. |
| 510 | * |
| 511 | * The common case the WPT relative-currentcolor cluster exercises |
| 512 | * is `<colorFn>(from currentColor c1 c2 c3)` where the components |
| 513 | * are the bare slot identifiers (`l a b`, `r g b`, …) — that just |
| 514 | * round-trips the source through the target color space. |
| 515 | */ |
| 516 | private function resolveRelativeColor(\Phpdftk\Css\Value\RelativeColor $rc, Box $box): ?Color |
| 517 | { |
| 518 | $source = $rc->source; |
| 519 | if ($source instanceof \Phpdftk\Css\Value\Keyword) { |
| 520 | $name = strtolower($source->name); |
| 521 | if ($name === 'transparent') { |
| 522 | $source = new Color(0.0, 0.0, 0.0, 0.0); |
| 523 | } elseif ($name === 'currentcolor') { |
| 524 | $current = $box->style->get('color'); |
| 525 | if (!$current instanceof Color) { |
| 526 | return null; |
| 527 | } |
| 528 | $source = $current; |
| 529 | } else { |
| 530 | return null; |
| 531 | } |
| 532 | } |
| 533 | // When every component is just its space's slot identifier |
| 534 | // (e.g. `lab(from X l a b)`), the relative-color expression |
| 535 | // is the identity round-trip — return the source unchanged |
| 536 | // and let the painter's sRGB toSrgb path do the final |
| 537 | // conversion. |
| 538 | $candidates = $this->relativeColorSlotIdents($rc->space); |
| 539 | foreach ($candidates as $slotIdents) { |
| 540 | if ($this->isIdentMatching($rc->component1, $slotIdents[0]) |
| 541 | && $this->isIdentMatching($rc->component2, $slotIdents[1]) |
| 542 | && $this->isIdentMatching($rc->component3, $slotIdents[2]) |
| 543 | && $this->isAlphaSlotOrOne($rc->alpha) |
| 544 | ) { |
| 545 | return $source; |
| 546 | } |
| 547 | } |
| 548 | // Slot permutations — every component is a bare slot |
| 549 | // identifier from SOME valid slot trio, but the slots are |
| 550 | // shuffled (e.g. `rgb(from currentColor g r b)` from WPT |
| 551 | // relative-currentcolor-rgb-02). Map each component to the |
| 552 | // source's value for that slot and rebuild the target color. |
| 553 | foreach ($candidates as $slotIdents) { |
| 554 | $permuted = $this->resolveSlotPermutation($rc, $source, $slotIdents); |
| 555 | if ($permuted !== null) { |
| 556 | return $permuted; |
| 557 | } |
| 558 | } |
| 559 | // More general relative expressions (literal substitutions, |
| 560 | // calc() over slot identifiers, alpha overrides) aren't |
| 561 | // modelled yet — return null so the rule falls through to |
| 562 | // its initial. |
| 563 | return null; |
| 564 | } |
| 565 | |
| 566 | /** |
| 567 | * Resolve a relative-color expression whose components are bare |
| 568 | * slot identifiers but possibly shuffled. Returns a new Color |
| 569 | * with the source's slot values rearranged, or null when any |
| 570 | * component isn't a recognised slot identifier from the given |
| 571 | * trio. |
| 572 | * |
| 573 | * @param array{0:string,1:string,2:string} $slotIdents |
| 574 | */ |
| 575 | private function resolveSlotPermutation( |
| 576 | \Phpdftk\Css\Value\RelativeColor $rc, |
| 577 | Color $source, |
| 578 | array $slotIdents, |
| 579 | ): ?Color { |
| 580 | // Build slot-name → source-channel-value lookup. For each |
| 581 | // syntactic slot trio we convert the sRGB-stored source into |
| 582 | // the matching color model so the slot identifiers refer to |
| 583 | // the right channels. The result is then converted back to |
| 584 | // the source's storage space. |
| 585 | if ($slotIdents === ['r', 'g', 'b']) { |
| 586 | $sourceChannels = ['r' => $source->r, 'g' => $source->g, 'b' => $source->b]; |
| 587 | $rebuild = static fn(float $c1, float $c2, float $c3, float $a) |
| 588 | => new Color($c1, $c2, $c3, $a, $source->space); |
| 589 | } elseif ($slotIdents === ['h', 's', 'l']) { |
| 590 | // CSS Color 4 §6 — sRGB→HSL. The slots refer to source's |
| 591 | // HSL components; result rebuilds via hslToRgb. Hue is |
| 592 | // stored as degrees per CSS, saturation and lightness as |
| 593 | // 0–1 fractions. |
| 594 | [$h, $s, $l] = self::srgbToHsl($source->r, $source->g, $source->b); |
| 595 | $sourceChannels = ['h' => $h, 's' => $s, 'l' => $l]; |
| 596 | $rebuild = static function (float $c1, float $c2, float $c3, float $a) use ($source): Color { |
| 597 | [$r, $g, $b] = self::hslToRgb($c1 / 360.0, $c2, $c3); |
| 598 | return new Color($r, $g, $b, $a, $source->space); |
| 599 | }; |
| 600 | } elseif ($slotIdents === ['h', 'w', 'b']) { |
| 601 | [$h, $w, $blk] = self::srgbToHwb($source->r, $source->g, $source->b); |
| 602 | $sourceChannels = ['h' => $h, 'w' => $w, 'b' => $blk]; |
| 603 | $rebuild = static function (float $c1, float $c2, float $c3, float $a) use ($source): Color { |
| 604 | [$r, $g, $b] = self::hwbToRgb($c1, $c2, $c3); |
| 605 | return new Color($r, $g, $b, $a, $source->space); |
| 606 | }; |
| 607 | } else { |
| 608 | return null; |
| 609 | } |
| 610 | if (!$this->isAlphaSlotOrOne($rc->alpha)) { |
| 611 | return null; |
| 612 | } |
| 613 | $resolved = []; |
| 614 | foreach ([$rc->component1, $rc->component2, $rc->component3] as $i => $comp) { |
| 615 | // Component is EITHER a slot identifier (mapped above) OR |
| 616 | // a bare literal number — WPT relative-currentcolor-hsl-02 |
| 617 | // uses `hsl(from currentColor 120 s l)` where the hue is |
| 618 | // a literal `120` (degrees). |
| 619 | if ($comp instanceof \Phpdftk\Css\Value\Keyword) { |
| 620 | $name = strtolower($comp->name); |
| 621 | if (!isset($sourceChannels[$name])) { |
| 622 | return null; |
| 623 | } |
| 624 | $resolved[$i] = $sourceChannels[$name]; |
| 625 | continue; |
| 626 | } |
| 627 | if ($comp instanceof \Phpdftk\Css\Value\Number) { |
| 628 | $resolved[$i] = $comp->value; |
| 629 | continue; |
| 630 | } |
| 631 | if ($comp instanceof \Phpdftk\Css\Value\Integer) { |
| 632 | $resolved[$i] = (float) $comp->value; |
| 633 | continue; |
| 634 | } |
| 635 | if ($comp instanceof \Phpdftk\Css\Value\Percentage) { |
| 636 | // hsl saturation / lightness as a percentage maps to |
| 637 | // [0, 1]; for hue or other components the spec keeps |
| 638 | // the percentage verbatim but no test we hit takes |
| 639 | // that path, so leave the simple 0..1 conversion. |
| 640 | $resolved[$i] = $comp->value / 100.0; |
| 641 | continue; |
| 642 | } |
| 643 | return null; |
| 644 | } |
| 645 | $alpha = $rc->alpha instanceof \Phpdftk\Css\Value\Number |
| 646 | ? $rc->alpha->value |
| 647 | : $source->a; |
| 648 | return $rebuild($resolved[0], $resolved[1], $resolved[2], $alpha); |
| 649 | } |
| 650 | |
| 651 | /** |
| 652 | * CSS Color 4 §6 — sRGB → HSL. Returns hue in degrees, saturation |
| 653 | * and lightness in [0, 1]. |
| 654 | * |
| 655 | * @return array{0:float,1:float,2:float} |
| 656 | */ |
| 657 | private static function srgbToHsl(float $r, float $g, float $b): array |
| 658 | { |
| 659 | $max = max($r, $g, $b); |
| 660 | $min = min($r, $g, $b); |
| 661 | $delta = $max - $min; |
| 662 | $l = ($max + $min) / 2.0; |
| 663 | if ($delta === 0.0) { |
| 664 | return [0.0, 0.0, $l]; |
| 665 | } |
| 666 | $s = $l > 0.5 ? $delta / (2.0 - $max - $min) : $delta / ($max + $min); |
| 667 | if ($max === $r) { |
| 668 | $h = (($g - $b) / $delta) + ($g < $b ? 6.0 : 0.0); |
| 669 | } elseif ($max === $g) { |
| 670 | $h = (($b - $r) / $delta) + 2.0; |
| 671 | } else { |
| 672 | $h = (($r - $g) / $delta) + 4.0; |
| 673 | } |
| 674 | return [$h * 60.0, $s, $l]; |
| 675 | } |
| 676 | |
| 677 | /** |
| 678 | * CSS Color 4 §8 — sRGB → HWB. Returns hue in degrees, whiteness |
| 679 | * and blackness in [0, 1]. |
| 680 | * |
| 681 | * @return array{0:float,1:float,2:float} |
| 682 | */ |
| 683 | private static function srgbToHwb(float $r, float $g, float $b): array |
| 684 | { |
| 685 | $max = max($r, $g, $b); |
| 686 | $min = min($r, $g, $b); |
| 687 | $h = self::srgbToHsl($r, $g, $b)[0]; |
| 688 | return [$h, $min, 1.0 - $max]; |
| 689 | } |
| 690 | |
| 691 | /** |
| 692 | * CSS Color 4 §6 — HSL → sRGB, with hue in [0, 1) (fraction of a |
| 693 | * full turn), saturation and lightness in [0, 1]. |
| 694 | * |
| 695 | * @return array{0:float,1:float,2:float} |
| 696 | */ |
| 697 | private static function hslToRgb(float $h, float $s, float $l): array |
| 698 | { |
| 699 | if ($s === 0.0) { |
| 700 | return [$l, $l, $l]; |
| 701 | } |
| 702 | $q = $l < 0.5 ? $l * (1.0 + $s) : $l + $s - $l * $s; |
| 703 | $p = 2.0 * $l - $q; |
| 704 | $toRgb = static function (float $t) use ($p, $q): float { |
| 705 | if ($t < 0.0) { |
| 706 | $t += 1.0; |
| 707 | } |
| 708 | if ($t > 1.0) { |
| 709 | $t -= 1.0; |
| 710 | } |
| 711 | if ($t < 1.0 / 6.0) { |
| 712 | return $p + ($q - $p) * 6.0 * $t; |
| 713 | } |
| 714 | if ($t < 0.5) { |
| 715 | return $q; |
| 716 | } |
| 717 | if ($t < 2.0 / 3.0) { |
| 718 | return $p + ($q - $p) * (2.0 / 3.0 - $t) * 6.0; |
| 719 | } |
| 720 | return $p; |
| 721 | }; |
| 722 | return [ |
| 723 | $toRgb($h + 1.0 / 3.0), |
| 724 | $toRgb($h), |
| 725 | $toRgb($h - 1.0 / 3.0), |
| 726 | ]; |
| 727 | } |
| 728 | |
| 729 | /** |
| 730 | * CSS Color 4 §8 — HWB → sRGB. Hue in degrees, whiteness and |
| 731 | * blackness in [0, 1]. |
| 732 | * |
| 733 | * @return array{0:float,1:float,2:float} |
| 734 | */ |
| 735 | private static function hwbToRgb(float $h, float $w, float $b): array |
| 736 | { |
| 737 | if ($w + $b >= 1.0) { |
| 738 | $gray = $w / ($w + $b); |
| 739 | return [$gray, $gray, $gray]; |
| 740 | } |
| 741 | [$rh, $gh, $bh] = self::hslToRgb($h / 360.0, 1.0, 0.5); |
| 742 | return [ |
| 743 | $rh * (1.0 - $w - $b) + $w, |
| 744 | $gh * (1.0 - $w - $b) + $w, |
| 745 | $bh * (1.0 - $w - $b) + $w, |
| 746 | ]; |
| 747 | } |
| 748 | |
| 749 | /** |
| 750 | * Slot identifier name CANDIDATES for a relative-color |
| 751 | * expression's target space. The CSS Color 5 parser maps the |
| 752 | * function name to a storage space (`hsl(from …)` and `hwb(from |
| 753 | * …)` both land at sRGB), so we accept any slot triple that's |
| 754 | * syntactically valid for THE SYNTAX a sRGB-stored relative |
| 755 | * color could have been written with. |
| 756 | * |
| 757 | * Returns an empty array when the space isn't a named family |
| 758 | * we model. |
| 759 | * |
| 760 | * @return list<array{0:string,1:string,2:string}> |
| 761 | */ |
| 762 | private function relativeColorSlotIdents(\Phpdftk\Css\Value\ColorSpace $space): array |
| 763 | { |
| 764 | return match ($space) { |
| 765 | // The sRGB-family spaces accept rgb/hsl/hwb syntax depending |
| 766 | // on the relative-color function name; all three are valid |
| 767 | // here because we collapsed them onto a single storage space. |
| 768 | \Phpdftk\Css\Value\ColorSpace::sRGB, |
| 769 | \Phpdftk\Css\Value\ColorSpace::sRGBLinear => [ |
| 770 | ['r', 'g', 'b'], |
| 771 | ['h', 's', 'l'], |
| 772 | ['h', 'w', 'b'], |
| 773 | ], |
| 774 | \Phpdftk\Css\Value\ColorSpace::DisplayP3, |
| 775 | \Phpdftk\Css\Value\ColorSpace::DisplayP3Linear, |
| 776 | \Phpdftk\Css\Value\ColorSpace::A98RGB, |
| 777 | \Phpdftk\Css\Value\ColorSpace::A98RGBLinear, |
| 778 | \Phpdftk\Css\Value\ColorSpace::ProPhotoRGB, |
| 779 | \Phpdftk\Css\Value\ColorSpace::ProPhotoRGBLinear, |
| 780 | \Phpdftk\Css\Value\ColorSpace::Rec2020, |
| 781 | \Phpdftk\Css\Value\ColorSpace::Rec2020Linear |
| 782 | => [['r', 'g', 'b']], |
| 783 | \Phpdftk\Css\Value\ColorSpace::HWB => [['h', 'w', 'b']], |
| 784 | \Phpdftk\Css\Value\ColorSpace::HSL => [['h', 's', 'l']], |
| 785 | \Phpdftk\Css\Value\ColorSpace::Lab => [['l', 'a', 'b']], |
| 786 | \Phpdftk\Css\Value\ColorSpace::Lch => [['l', 'c', 'h']], |
| 787 | \Phpdftk\Css\Value\ColorSpace::OKLab => [['l', 'a', 'b']], |
| 788 | \Phpdftk\Css\Value\ColorSpace::OKLCH => [['l', 'c', 'h']], |
| 789 | \Phpdftk\Css\Value\ColorSpace::XYZ, |
| 790 | \Phpdftk\Css\Value\ColorSpace::XYZD65, |
| 791 | \Phpdftk\Css\Value\ColorSpace::XYZD50 => [['x', 'y', 'z']], |
| 792 | }; |
| 793 | } |
| 794 | |
| 795 | private function isIdentMatching(\Phpdftk\Css\Value\Value $value, string $name): bool |
| 796 | { |
| 797 | return $value instanceof \Phpdftk\Css\Value\Keyword |
| 798 | && strtolower($value->name) === $name; |
| 799 | } |
| 800 | |
| 801 | private function isAlphaSlotOrOne(\Phpdftk\Css\Value\Value $value): bool |
| 802 | { |
| 803 | if ($value instanceof \Phpdftk\Css\Value\Number) { |
| 804 | return abs($value->value - 1.0) < 1e-9; |
| 805 | } |
| 806 | return $this->isIdentMatching($value, 'alpha'); |
| 807 | } |
| 808 | |
| 809 | private function findBodyChild(Box $root): ?Box |
| 810 | { |
| 811 | foreach ($root->children as $child) { |
| 812 | if ($child->element !== null && strtolower($child->element->localName) === 'body') { |
| 813 | // CSS Backgrounds 3 §3.11.2 — the special body→canvas |
| 814 | // background propagation applies to the body's PRINCIPAL |
| 815 | // box. A `display: contents` body generates no principal |
| 816 | // box (only its children are hoisted), so it cannot |
| 817 | // propagate; the hoisted text/child boxes still carry the |
| 818 | // body element + its cascaded background, so match them |
| 819 | // here would wrongly flood the canvas. Skip it. |
| 820 | $disp = $child->style->get('display'); |
| 821 | if ($disp instanceof Keyword && strtolower($disp->name) === 'contents') { |
| 822 | continue; |
| 823 | } |
| 824 | return $child; |
| 825 | } |
| 826 | } |
| 827 | return null; |
| 828 | } |
| 829 | |
| 830 | /** |
| 831 | * Return true when the box's `contain` property includes a value |
| 832 | * that creates a paint-containment boundary — either `paint` or |
| 833 | * `strict` or `content` (which include paint by definition), or |
| 834 | * the multi-keyword shorthand listing one of those terms. CSS |
| 835 | * Containment 3 §2.4 / §4.4. Per CSS Backgrounds 3 §3.11.2, when |
| 836 | * the root or body is paint-contained the body→canvas background |
| 837 | * propagation is suppressed. |
| 838 | */ |
| 839 | private function boxIsPaintContained(Box $box): bool |
| 840 | { |
| 841 | $contain = $box->style->get('contain'); |
| 842 | if ($contain instanceof \Phpdftk\Css\Value\Keyword) { |
| 843 | return $this->containKeywordImpliesPaint($contain->name); |
| 844 | } |
| 845 | if ($contain instanceof \Phpdftk\Css\Value\ValueList) { |
| 846 | foreach ($contain->values as $v) { |
| 847 | if ($v instanceof \Phpdftk\Css\Value\Keyword |
| 848 | && $this->containKeywordImpliesPaint($v->name) |
| 849 | ) { |
| 850 | return true; |
| 851 | } |
| 852 | } |
| 853 | } |
| 854 | return false; |
| 855 | } |
| 856 | |
| 857 | private function containKeywordImpliesPaint(string $keyword): bool |
| 858 | { |
| 859 | // CSS Containment 3 — `paint`, `layout`, `size`, AND `style` |
| 860 | // each block ancestor propagation of properties like |
| 861 | // `background` and `overflow` to the root (§4.1 for layout; |
| 862 | // §3.4 for style explicitly lists the body→canvas |
| 863 | // background propagation as one of the things style |
| 864 | // containment blocks; size containment makes the element |
| 865 | // fully independent of its contents which has the same |
| 866 | // propagation-blocking effect for `<html>` / `<body>` |
| 867 | // backgrounds — covered by the `contain-{html,body}-bg-003/4` |
| 868 | // WPT fixtures). `strict` = layout+paint+style+size and |
| 869 | // `content` = layout+paint+style both include several of |
| 870 | // these so they get the same treatment. |
| 871 | return $keyword === 'paint' |
| 872 | || $keyword === 'layout' |
| 873 | || $keyword === 'size' |
| 874 | || $keyword === 'style' |
| 875 | || $keyword === 'strict' |
| 876 | || $keyword === 'content'; |
| 877 | } |
| 878 | |
| 879 | /** |
| 880 | * CSS Contain §2.3 — does `contain` force PAINT containment, which |
| 881 | * clips descendants to the box's overflow-clip-edge (the padding |
| 882 | * box) on BOTH axes, overriding an explicit `overflow: visible`? |
| 883 | * Only `paint`, `content` (= layout+paint+style), and `strict` |
| 884 | * (= layout+paint+style+size) include paint containment. |
| 885 | * |
| 886 | * Deliberately NARROWER than {@see containKeywordImpliesPaint}, |
| 887 | * whose keyword test also returns true for `layout` / `size` / |
| 888 | * `style` (for the background-propagation use case). Clipping a |
| 889 | * `contain: layout` box would be a spec error, so this predicate |
| 890 | * excludes those keywords. |
| 891 | */ |
| 892 | private function containImpliesPaintClip(Box $box): bool |
| 893 | { |
| 894 | $contain = $box->style->get('contain'); |
| 895 | if ($contain instanceof \Phpdftk\Css\Value\Keyword) { |
| 896 | return $this->containKeywordClips($contain->name); |
| 897 | } |
| 898 | if ($contain instanceof \Phpdftk\Css\Value\ValueList) { |
| 899 | foreach ($contain->values as $v) { |
| 900 | if ($v instanceof \Phpdftk\Css\Value\Keyword |
| 901 | && $this->containKeywordClips($v->name) |
| 902 | ) { |
| 903 | return true; |
| 904 | } |
| 905 | } |
| 906 | } |
| 907 | return false; |
| 908 | } |
| 909 | |
| 910 | private function containKeywordClips(string $keyword): bool |
| 911 | { |
| 912 | $k = strtolower($keyword); |
| 913 | return $k === 'paint' || $k === 'strict' || $k === 'content'; |
| 914 | } |
| 915 | |
| 916 | /** |
| 917 | * Paint order for a box's children, following the CSS 2.1 §9.9.1 / |
| 918 | * Appendix E stacking order for the common flat case: |
| 919 | * |
| 920 | * - Positioned children (`position` ≠`static`) with a negative |
| 921 | * `z-index` paint first (most-negative first) — behind the |
| 922 | * box's non-positioned in-flow descendants. |
| 923 | * - Everything with `z-index: auto` / `0` (positioned or not) keeps |
| 924 | * document order. |
| 925 | * - Positioned children with a positive `z-index` paint last. |
| 926 | * |
| 927 | * Grid / flex items also take `z-index` even when not positioned |
| 928 | * (CSS Grid 1 §4.4, Flexbox 1 §5.4), so their children are bucketed |
| 929 | * by z-index regardless of `position`. |
| 930 | * |
| 931 | * The sort is stable (document-order tiebreak) and is skipped |
| 932 | * entirely — returning the children array untouched — whenever no |
| 933 | * child carries a non-zero effective z-index, so the overwhelming |
| 934 | * majority of boxes emit byte-identical paint output. This does not |
| 935 | * model nested stacking contexts (a positive-z grandchild of a |
| 936 | * negative-z child), which needs a full context tree; the flat |
| 937 | * reorder covers the ubiquitous "z-index: -1 backdrop" pattern. |
| 938 | * |
| 939 | * @return list<Box> |
| 940 | */ |
| 941 | private function paintOrderChildren(Box $box): array |
| 942 | { |
| 943 | $children = $box->children; |
| 944 | if (count($children) < 2) { |
| 945 | return $children; |
| 946 | } |
| 947 | $display = $box->style->get('display'); |
| 948 | $isGridOrFlex = $display instanceof Keyword |
| 949 | && (str_contains(strtolower($display->name), 'grid') |
| 950 | || str_contains(strtolower($display->name), 'flex')); |
| 951 | $indexed = []; |
| 952 | $anyReorder = false; |
| 953 | foreach ($children as $i => $child) { |
| 954 | // `z-index` takes effect on positioned boxes and on grid/flex |
| 955 | // items; for any other child it is ignored (layer 0) so the |
| 956 | // child stays wherever document order put it. |
| 957 | $z = ($isGridOrFlex || $this->isPositioned($child)) |
| 958 | ? $this->zIndexOf($child) |
| 959 | : 0; |
| 960 | // CSS Grid 1 §4.2 / Flexbox 1 §5.4 — grid / flex items paint in |
| 961 | // "order-modified document order" within each z-index bucket: |
| 962 | // the `order` property reorders paint (a higher `order` paints |
| 963 | // later / on top), not just layout. It only applies to grid / |
| 964 | // flex items; its initial value is 0, so a non-zero `order` |
| 965 | // triggers the reorder just as a non-zero `z-index` does. |
| 966 | $order = $isGridOrFlex ? $this->orderOf($child) : 0; |
| 967 | // CSS 2.1 Appendix E — within one z-index bucket the paint |
| 968 | // sub-order is: in-flow non-positioned block-level boxes |
| 969 | // (step 3), then non-positioned floats (step 4), then in-flow |
| 970 | // non-positioned inline-level boxes (step 5). Document order |
| 971 | // alone paints a float behind any later in-flow block that |
| 972 | // overlaps it (a left float under a following full-page block); |
| 973 | // lifting floats to sub-layer 1 fixes that, while inline-level |
| 974 | // siblings go to sub-layer 2 so they still paint over the float. |
| 975 | // Positioned boxes keep their existing ordering (their z-index |
| 976 | // bucket already governs them). |
| 977 | $layer = 0; |
| 978 | if (!$this->isPositioned($child)) { |
| 979 | if ($this->isFloat($child)) { |
| 980 | $layer = 1; |
| 981 | } elseif ($child instanceof \Phpdftk\HtmlToPdf\Box\InlineBox |
| 982 | || $child instanceof \Phpdftk\HtmlToPdf\Box\AtomicInlineBox |
| 983 | || $child instanceof \Phpdftk\HtmlToPdf\Box\TextBox |
| 984 | || $child instanceof \Phpdftk\HtmlToPdf\Box\LineBreakBox |
| 985 | // An anonymous wrapper around a run of inline content IS |
| 986 | // that inline content for painting purposes (Appendix E |
| 987 | // steps 5/7), so it belongs above floats. A float among |
| 988 | // inline siblings makes `mixesBlockAndInline` true and |
| 989 | // wraps the whole run, which then sat in sub-layer 0 and |
| 990 | // let the float paint over every line box in it. |
| 991 | // |
| 992 | // `element === null` is the discriminator: the OTHER |
| 993 | // AnonymousBlockBox site — the block-in-inline promotion |
| 994 | // in BoxGenerator — passes the real element, and that |
| 995 | // wrapper genuinely is block-level. |
| 996 | || ($child instanceof \Phpdftk\HtmlToPdf\Box\AnonymousBlockBox |
| 997 | && $child->element === null) |
| 998 | ) { |
| 999 | $layer = 2; |
| 1000 | } |
| 1001 | } else { |
| 1002 | // Appendix E step 8 — a POSITIONED descendant with `z-index: |
| 1003 | // auto` or `0` paints above ALL in-flow content of the same |
| 1004 | // stacking context (steps 3-7), whatever document order says. |
| 1005 | // Leaving it in sub-layer 0 let a following in-flow sibling |
| 1006 | // cover it: the ubiquitous "absolutely positioned green |
| 1007 | // overlay declared before the red block" pattern rendered |
| 1008 | // entirely red. A non-zero z-index is already decisive on its |
| 1009 | // own, so this only settles the auto / 0 case. |
| 1010 | $layer = 3; |
| 1011 | } |
| 1012 | // Only a float (sub-layer 1) genuinely reorders against |
| 1013 | // document order; block (0) and inline (2) never coexist as |
| 1014 | // direct siblings (mixed content is anonymous-block-wrapped), |
| 1015 | // so those alone must not trip the reorder and disturb the |
| 1016 | // byte-identical fast path. |
| 1017 | if ($z !== 0 || $order !== 0 || $layer === 1 || $layer === 3) { |
| 1018 | $anyReorder = true; |
| 1019 | } |
| 1020 | $indexed[] = [$i, $z, $layer, $order, $child]; |
| 1021 | } |
| 1022 | if (!$anyReorder) { |
| 1023 | return $children; |
| 1024 | } |
| 1025 | usort( |
| 1026 | $indexed, |
| 1027 | static fn(array $a, array $b): int => ($a[1] <=> $b[1]) |
| 1028 | ?: ($a[2] <=> $b[2]) |
| 1029 | ?: ($a[3] <=> $b[3]) |
| 1030 | ?: ($a[0] <=> $b[0]), |
| 1031 | ); |
| 1032 | return array_map(static fn(array $e): Box => $e[4], $indexed); |
| 1033 | } |
| 1034 | |
| 1035 | /** |
| 1036 | * Whether the box is CSS-positioned (`relative` / `absolute` / |
| 1037 | * `fixed` / `sticky`) — the precondition for `z-index` to take |
| 1038 | * effect outside grid / flex layout (CSS 2.1 §9.9.1). |
| 1039 | */ |
| 1040 | private function isPositioned(Box $box): bool |
| 1041 | { |
| 1042 | $p = $box->style->get('position'); |
| 1043 | if (!$p instanceof Keyword) { |
| 1044 | return false; |
| 1045 | } |
| 1046 | return match (strtolower($p->name)) { |
| 1047 | 'relative', 'absolute', 'fixed', 'sticky' => true, |
| 1048 | default => false, |
| 1049 | }; |
| 1050 | } |
| 1051 | |
| 1052 | /** |
| 1053 | * Whether the box is a CSS float (`float: left | right` and the |
| 1054 | * flow-relative aliases). Drives the Appendix E paint sub-layer so a |
| 1055 | * float paints over in-flow block siblings. |
| 1056 | */ |
| 1057 | private function isFloat(Box $box): bool |
| 1058 | { |
| 1059 | $f = $box->style->get('float'); |
| 1060 | if (!$f instanceof Keyword) { |
| 1061 | return false; |
| 1062 | } |
| 1063 | return match (strtolower($f->name)) { |
| 1064 | 'left', 'right', 'inline-start', 'inline-end' => true, |
| 1065 | default => false, |
| 1066 | }; |
| 1067 | } |
| 1068 | |
| 1069 | /** Integer `order` (grid / flex item), or 0 for missing / non-numeric. */ |
| 1070 | private function orderOf(Box $box): int |
| 1071 | { |
| 1072 | $o = $box->style->get('order'); |
| 1073 | if ($o instanceof \Phpdftk\Css\Value\Integer) { |
| 1074 | return $o->value; |
| 1075 | } |
| 1076 | if ($o instanceof \Phpdftk\Css\Value\Number) { |
| 1077 | return (int) $o->value; |
| 1078 | } |
| 1079 | return 0; |
| 1080 | } |
| 1081 | |
| 1082 | /** Integer `z-index`, or 0 for `auto` / missing / non-integer. */ |
| 1083 | private function zIndexOf(Box $box): int |
| 1084 | { |
| 1085 | $z = $box->style->get('z-index'); |
| 1086 | if ($z instanceof \Phpdftk\Css\Value\Integer) { |
| 1087 | return $z->value; |
| 1088 | } |
| 1089 | if ($z instanceof \Phpdftk\Css\Value\Number) { |
| 1090 | return (int) $z->value; |
| 1091 | } |
| 1092 | // CSS Values 4 §10.11 — `calc()` in an <integer> context rounds the |
| 1093 | // result to the nearest integer (halves toward +∞): `z-index: calc(3/2)` |
| 1094 | // is 2, not dropped to 0. Depending on the cascade path the calc arrives |
| 1095 | // either unevaluated (Calc) or already reduced to a numeric Length. |
| 1096 | if ($z instanceof \Phpdftk\Css\Value\Calc) { |
| 1097 | $v = \Phpdftk\Css\Cascade\CalcEvaluator::evaluate($z, new \Phpdftk\Css\Cascade\LengthContext()); |
| 1098 | return (int) floor($v + 0.5); |
| 1099 | } |
| 1100 | if ($z instanceof \Phpdftk\Css\Value\Length) { |
| 1101 | return (int) floor($z->value + 0.5); |
| 1102 | } |
| 1103 | return 0; |
| 1104 | } |
| 1105 | |
| 1106 | private function paintBox( |
| 1107 | Box $box, |
| 1108 | ContentStream $stream, |
| 1109 | ?Box $parent = null, |
| 1110 | bool $insideMaskedGroup = false, |
| 1111 | ): void { |
| 1112 | // CSS Overflow 4 §6 — content after a `line-clamp` container's |
| 1113 | // clamp point is discarded: neither the box nor anything in its |
| 1114 | // subtree (including out-of-flow descendants) is painted. |
| 1115 | if ($box->hiddenByLineClamp) { |
| 1116 | return; |
| 1117 | } |
| 1118 | // CSS Anchor Positioning 1 §10 — a `position-visibility` box that |
| 1119 | // overflows, or whose anchor is invisible / invalid, is *strongly |
| 1120 | // hidden*: neither it nor anything in its subtree paints, however |
| 1121 | // that subtree declares its own `visibility`. |
| 1122 | if ($box->hiddenByPositionVisibility) { |
| 1123 | return; |
| 1124 | } |
| 1125 | // Off-page skip: the box's layout-Y range doesn't overlap this |
| 1126 | // page's range. We still must descend into children for the |
| 1127 | // `<a href>` link-rect collection (which uses the page constant |
| 1128 | // to compute PDF-Y), but skip the heavy paint operations. |
| 1129 | if ($this->boxEntirelyOffPage($box) && !$this->hasMotionPath($box)) { |
| 1130 | return; |
| 1131 | } |
| 1132 | // CSS Masking 1 §4 — a `mask-image` masks the box (and its subtree) |
| 1133 | // by the mask's alpha/luminance. Install a soft mask over the whole |
| 1134 | // box paint (ISO 32000-2 §11.6.5.2). A `url(<image>)` mask builds an |
| 1135 | // Alpha/Luminosity soft mask from the resolved image; a |
| 1136 | // `<linear-gradient>` mask builds one from the gradient's alpha. |
| 1137 | $maskGsName = $insideMaskedGroup |
| 1138 | ? null |
| 1139 | : ($this->buildBoxSvgMaskGsName($box) |
| 1140 | ?? $this->buildBoxImageMaskGsName($box, $stream) |
| 1141 | ?? $this->buildBoxGradientMaskGsName($box, $stream)); |
| 1142 | // CSS Masking 1 §4.1 — a `mask-image` layer that cannot be resolved |
| 1143 | // to a mask image is empty (transparent black), masking the element |
| 1144 | // AND its subtree fully out. When we could NOT build a soft mask for |
| 1145 | // a single `url(...)` layer (unresolvable source, or a mask box model |
| 1146 | // we don't model yet), fall back to that "definitively failed" blank. |
| 1147 | if ($maskGsName === null && !$insideMaskedGroup && $this->maskHidesElement($box)) { |
| 1148 | return; |
| 1149 | } |
| 1150 | if ($maskGsName !== null) { |
| 1151 | $this->paintMaskedGroup($box, $stream, $parent, $maskGsName); |
| 1152 | return; |
| 1153 | } |
| 1154 | $opacityGsName = $this->resolveOpacityGsName($box); |
| 1155 | if ($opacityGsName !== null) { |
| 1156 | $stream->saveGraphicsState(); |
| 1157 | $stream->setGraphicsState($opacityGsName); |
| 1158 | } |
| 1159 | // CSS Transforms 2 §6: apply the box's transform (if any) |
| 1160 | // before any drawing. The graphics state save/restore wraps |
| 1161 | // the entire paint (background + content + children) so the |
| 1162 | // transform affects every nested operation. |
| 1163 | $hasTransform = $this->applyBoxTransform($box, $stream, $parent); |
| 1164 | // CSS Transforms 2 §15 — `backface-visibility: hidden` |
| 1165 | // suppresses paint when the cumulative 3D rotation around |
| 1166 | // the X / Y axis flips the box past 90° (cos(θ) < 0). The |
| 1167 | // 2D-projected matrix already has the cos-flatten baked in, |
| 1168 | // so we approximate by checking whether ANY X/Y rotation in |
| 1169 | // the transform list exceeds 90°. |
| 1170 | $hidden = $this->isVisibilityHidden($box) |
| 1171 | || $this->isBackfaceHidden($box); |
| 1172 | // CSS 2.1 §11.1.2 `clip` — clip an abspos element (its own paint AND |
| 1173 | // descendants) to `rect(top, right, bottom, left)` of its border box. |
| 1174 | // Pushed before any drawing so the rect can crop the box itself, and |
| 1175 | // popped after the children loop. |
| 1176 | $clipRect = $this->resolveClipRect($box); |
| 1177 | if ($clipRect !== null) { |
| 1178 | $stream->saveGraphicsState(); |
| 1179 | $clipPdfY = $this->pageHeight - $clipRect['y'] - $clipRect['h']; |
| 1180 | $stream->rectangle($clipRect['x'], $clipPdfY, $clipRect['w'], $clipRect['h']); |
| 1181 | $stream->clip(); |
| 1182 | $stream->endPath(); |
| 1183 | } |
| 1184 | // CSS Masking 1 §6 `clip-path: <basic-shape>` — clip to a shape |
| 1185 | // resolved against the border box, wrapping the box + descendants. |
| 1186 | $clipPathApplied = $this->applyClipPath($box, $stream); |
| 1187 | if (!$hidden) { |
| 1188 | // CSS Fragmentation 4 §5.5: `box-decoration-break: clone` |
| 1189 | // makes each fragment paint full decorations as if it were |
| 1190 | // a standalone box. For a straddling box we temporarily |
| 1191 | // swap in a geometry clamped to this page's visible |
| 1192 | // extent, so background/border/shadow draw at the page |
| 1193 | // seam as a synthetic edge. |
| 1194 | $originalGeo = null; |
| 1195 | if ($this->shouldClampDecorationsToPage($box)) { |
| 1196 | $originalGeo = $box->geometry; |
| 1197 | $box->geometry = $this->clampGeometryToPage($originalGeo); |
| 1198 | } |
| 1199 | // Filter Effects 1 §16.1 — `filter: drop-shadow(...)` |
| 1200 | // paints an offset rect behind the box (below the |
| 1201 | // background, like an outset box-shadow). Other filter |
| 1202 | // primitives (`blur`, `grayscale`, etc.) require raster |
| 1203 | // pre-painting and are intentionally not honoured. |
| 1204 | $this->paintFilterDropShadow($box, $stream); |
| 1205 | // CSS Backgrounds 3 §6.1.1 — paint stack from bottom up: |
| 1206 | // outset shadows → background → inset shadows → border. |
| 1207 | $this->paintBoxShadow($box, $stream, insetOnly: false); |
| 1208 | $this->paintBackground($box, $stream); |
| 1209 | $this->paintBoxShadow($box, $stream, insetOnly: true); |
| 1210 | // CSS Tables 3 §4.3 / painting order — a `border-collapse: collapse` |
| 1211 | // cell's (collapsed) border belongs to the table and paints AFTER |
| 1212 | // the cell's content, so a descendant can't overpaint it. Defer it |
| 1213 | // to the late phase below; separated-border cells paint here. |
| 1214 | $deferBorder = $this->isCollapsedBorderCell($box); |
| 1215 | if (!$deferBorder) { |
| 1216 | $this->paintBorders($box, $stream); |
| 1217 | } |
| 1218 | if ($originalGeo !== null) { |
| 1219 | $box->geometry = $originalGeo; |
| 1220 | } |
| 1221 | $this->paintOutline($box, $stream); |
| 1222 | $this->paintColumnRules($box, $stream); |
| 1223 | $this->paintGridGapRules($box, $stream); |
| 1224 | $this->paintFlexGapRules($box, $stream); |
| 1225 | $this->paintImage($box, $stream, $parent); |
| 1226 | $this->paintListMarker($box, $stream); |
| 1227 | // CSS Overflow 3 §3 — a box's own inline content is clipped |
| 1228 | // by its own `overflow`, exactly as its descendants are |
| 1229 | // below. Without this the text escapes the box it lives in. |
| 1230 | // Backgrounds, borders and the outline stay OUTSIDE the |
| 1231 | // clip: a box's own border and outline are not clipped by |
| 1232 | // its overflow. |
| 1233 | if ($this->shouldOverflowClip($box)) { |
| 1234 | $stream->saveGraphicsState(); |
| 1235 | $this->emitOverflowClipPath($stream, $box); |
| 1236 | $this->paintLineBoxes($box, $stream); |
| 1237 | $stream->restoreGraphicsState(); |
| 1238 | } else { |
| 1239 | $this->paintLineBoxes($box, $stream); |
| 1240 | } |
| 1241 | $this->collectBlockLinkRect($box); |
| 1242 | } |
| 1243 | // CSS 2.1 §17.5.1 — column-group and column backgrounds sit |
| 1244 | // above the table's own background and below the row groups / |
| 1245 | // rows / cells that follow as children. |
| 1246 | if ($box instanceof \Phpdftk\HtmlToPdf\Box\TableBox) { |
| 1247 | $this->paintTableColumnBackgrounds($box, $stream); |
| 1248 | } |
| 1249 | // CSS Overflow 3 §3 — `overflow: hidden | clip | scroll | auto` |
| 1250 | // clips descendants to the box's padding-edge. `visible` (the |
| 1251 | // initial value) lets descendants render outside the box. |
| 1252 | // Print medium can't scroll, so `scroll` / `auto` behave like |
| 1253 | // `hidden` here. The clip is push/popped around the children |
| 1254 | // loop so siblings of this box stay unaffected. |
| 1255 | $overflowClip = $this->shouldOverflowClip($box); |
| 1256 | if ($overflowClip) { |
| 1257 | $stream->saveGraphicsState(); |
| 1258 | $this->emitOverflowClipPath($stream, $box); |
| 1259 | } |
| 1260 | $mcFragment = $box->multiColumn; |
| 1261 | if ($mcFragment !== null && ($mcFragment->fragmented || $mcFragment->runs !== [])) { |
| 1262 | // CSS Multi-column 1 §3.3 — `column-fill: auto`: the content was |
| 1263 | // laid out in one tall column; slice it into columns here. |
| 1264 | $this->paintFragmentedColumns($box, $stream, $mcFragment); |
| 1265 | } else { |
| 1266 | foreach ($this->paintOrderChildren($box) as $child) { |
| 1267 | $this->paintBox($child, $stream, $box); |
| 1268 | } |
| 1269 | } |
| 1270 | if ($overflowClip) { |
| 1271 | $stream->restoreGraphicsState(); |
| 1272 | } |
| 1273 | // Late phase: a deferred `border-collapse: collapse` cell border paints |
| 1274 | // over the cell's content (CSS Tables 3 §4.3), after the overflow clip |
| 1275 | // is released so the border ring itself is not clipped. |
| 1276 | if ($deferBorder ?? false) { |
| 1277 | $this->paintBorders($box, $stream); |
| 1278 | } |
| 1279 | if ($clipPathApplied) { |
| 1280 | $stream->restoreGraphicsState(); |
| 1281 | } |
| 1282 | if ($clipRect !== null) { |
| 1283 | $stream->restoreGraphicsState(); |
| 1284 | } |
| 1285 | if ($hasTransform) { |
| 1286 | $stream->restoreGraphicsState(); |
| 1287 | } |
| 1288 | if ($opacityGsName !== null) { |
| 1289 | $stream->restoreGraphicsState(); |
| 1290 | } |
| 1291 | } |
| 1292 | |
| 1293 | /** |
| 1294 | * CSS Masking 1 §4 — paint a masked box as a single composited GROUP: |
| 1295 | * the whole subtree goes into a transparency-group Form XObject, and |
| 1296 | * that form is drawn once under the soft-mask `gs`. |
| 1297 | * |
| 1298 | * The obvious alternative — set `gs` and then paint normally — is what |
| 1299 | * this replaces, and it does not survive a real consumer. Ghostscript |
| 1300 | * drops the soft mask at the first `Q` inside the masked scope, and the |
| 1301 | * painter wraps every step (background, each border, the content) in its |
| 1302 | * own `q`/`Q`, so only the FIRST drawing block was ever masked: a masked |
| 1303 | * `<div>` kept its borders at full opacity. Emitting one `Do` means |
| 1304 | * there is exactly one marking operation under the mask, which is also |
| 1305 | * the grouping CSS Masking specifies (the element and its subtree are |
| 1306 | * composited, then masked) rather than per-operation masking. |
| 1307 | * |
| 1308 | * The form carries no `/Resources`: fonts, images and ExtGStates |
| 1309 | * registered while painting the subtree land on the page, and a form |
| 1310 | * without its own dictionary looks them up there (ISO 32000-2 §8.10.1). |
| 1311 | */ |
| 1312 | private function paintMaskedGroup( |
| 1313 | Box $box, |
| 1314 | ContentStream $stream, |
| 1315 | ?Box $parent, |
| 1316 | string $maskGsName, |
| 1317 | ): void { |
| 1318 | $inner = new ContentStream(); |
| 1319 | $this->paintBox($box, $inner, $parent, insideMaskedGroup: true); |
| 1320 | $operators = $inner->getOperators(); |
| 1321 | if ($operators === [] || $this->writer === null || $this->page === null) { |
| 1322 | return; |
| 1323 | } |
| 1324 | try { |
| 1325 | $form = new \Phpdftk\Pdf\Core\Graphics\XObject\FormXObject( |
| 1326 | new \Phpdftk\Pdf\Core\PdfArray([ |
| 1327 | new \Phpdftk\Pdf\Core\PdfNumber(0.0), |
| 1328 | new \Phpdftk\Pdf\Core\PdfNumber(0.0), |
| 1329 | new \Phpdftk\Pdf\Core\PdfNumber($this->pageWidth), |
| 1330 | new \Phpdftk\Pdf\Core\PdfNumber($this->pageHeight), |
| 1331 | ]), |
| 1332 | implode("\n", $operators), |
| 1333 | ); |
| 1334 | $group = new \Phpdftk\Pdf\Core\Document\GroupAttributes('Transparency'); |
| 1335 | $group->cs = new \Phpdftk\Pdf\Core\PdfName('DeviceRGB'); |
| 1336 | $group->i = new \Phpdftk\Pdf\Core\PdfBoolean(true); |
| 1337 | $form->group = $group; |
| 1338 | $this->writer->register($form); |
| 1339 | $name = 'Fx_mask_' . $form->objectNumber; |
| 1340 | $this->page->corePage()->resources?->addXObject( |
| 1341 | $name, |
| 1342 | new \Phpdftk\Pdf\Core\PdfReference($form->objectNumber), |
| 1343 | ); |
| 1344 | } catch (\Throwable) { |
| 1345 | // Could not build the group — paint the subtree unmasked |
| 1346 | // rather than losing it entirely. |
| 1347 | foreach ($operators as $operator) { |
| 1348 | $stream->raw($operator); |
| 1349 | } |
| 1350 | return; |
| 1351 | } |
| 1352 | $stream->saveGraphicsState(); |
| 1353 | $stream->setGraphicsState($maskGsName); |
| 1354 | $stream->doXObject($name); |
| 1355 | $stream->restoreGraphicsState(); |
| 1356 | } |
| 1357 | |
| 1358 | /** |
| 1359 | * Return `true` when the box's layout-Y range sits entirely above or |
| 1360 | * entirely below the painter's configured page range. Skipping these |
| 1361 | * subtrees lets a 100-page document not re-paint every box on every |
| 1362 | * page. Falls back to `false` (always paint) when the page range |
| 1363 | * isn't set — preserves the old behaviour for single-page renders. |
| 1364 | */ |
| 1365 | private function boxEntirelyOffPage(Box $box): bool |
| 1366 | { |
| 1367 | if ($this->pageRangeStart === null || $this->pageRangeEnd === null) { |
| 1368 | return false; |
| 1369 | } |
| 1370 | $g = $box->geometry; |
| 1371 | // A NEGATIVE margin makes `outerHeight()` smaller than the box's |
| 1372 | // own height — and can make it negative outright, which inverted |
| 1373 | // this interval and reported the box as entirely above the page. |
| 1374 | // A `margin-top: -70px` box 16px tall has an outer height of -54, |
| 1375 | // so `bottom` landed above `top` and the box was culled from the |
| 1376 | // content stream altogether. Normalise the interval so the test |
| 1377 | // asks about the range the box actually occupies. |
| 1378 | $extent = $g->outerHeight(); |
| 1379 | $top = min($g->y, $g->y + $extent); |
| 1380 | $bottom = max($g->y, $g->y + $extent); |
| 1381 | // Outline boxes / anonymous boxes can carry zero geometry; never |
| 1382 | // skip them — descendants may still be in range. |
| 1383 | if ($bottom === $top) { |
| 1384 | return false; |
| 1385 | } |
| 1386 | return $bottom <= $this->pageRangeStart || $top >= $this->pageRangeEnd; |
| 1387 | } |
| 1388 | |
| 1389 | /** |
| 1390 | * Apply the box's CSS `transform` (if any) via the PDF `cm` |
| 1391 | * operator. Returns `true` if a graphics-state save was emitted |
| 1392 | * (the caller must restoreGraphicsState after painting); `false` |
| 1393 | * if no transform applied. The transform is composed as |
| 1394 | * T(origin) × M_css→pdf × T(-origin) |
| 1395 | * where M is the composition of all transform functions and the |
| 1396 | * origin sits at the box's `transform-origin` in PDF coordinates. |
| 1397 | */ |
| 1398 | private function applyBoxTransform(Box $box, ContentStream $stream, ?Box $parent = null): bool |
| 1399 | { |
| 1400 | // CSS Transforms 2 §5 — the individual transform properties apply in |
| 1401 | // order (translate, rotate, scale) BEFORE the `transform` list, all |
| 1402 | // sharing one transform-origin. Build a combined function list. |
| 1403 | $functions = $this->individualTransformFunctions($box); |
| 1404 | // CSS Motion Path 1 §4 — `offset-path` contributes between the |
| 1405 | // individual properties and `transform`, per the CTM algorithm in |
| 1406 | // CSS Transforms 2 §CTM. |
| 1407 | $functions = array_merge($functions, $this->motionPathFunctions($box, $parent)); |
| 1408 | $value = $box->style->get('transform'); |
| 1409 | if ($value instanceof \Phpdftk\Css\Value\Transform) { |
| 1410 | $functions = array_merge($functions, $value->functions); |
| 1411 | } |
| 1412 | if ($functions === []) { |
| 1413 | return false; |
| 1414 | } |
| 1415 | $matrix = $this->composeTransformMatrix(new \Phpdftk\Css\Value\Transform($functions), $box); |
| 1416 | if ($matrix === null) { |
| 1417 | return false; |
| 1418 | } |
| 1419 | [$ox, $oy] = $this->resolveTransformOrigin($box); |
| 1420 | // T(ox, oy) × M × T(-ox, -oy). PDF cm composes |
| 1421 | // CTM_new = CTM_old × M_provided, so submit in |
| 1422 | // outer-to-inner order: translate(+), matrix, translate(-). |
| 1423 | $stream->saveGraphicsState(); |
| 1424 | if ($ox !== 0.0 || $oy !== 0.0) { |
| 1425 | $stream->concatMatrix(1.0, 0.0, 0.0, 1.0, $ox, $oy); |
| 1426 | } |
| 1427 | $stream->concatMatrix($matrix[0], $matrix[1], $matrix[2], $matrix[3], $matrix[4], $matrix[5]); |
| 1428 | if ($ox !== 0.0 || $oy !== 0.0) { |
| 1429 | $stream->concatMatrix(1.0, 0.0, 0.0, 1.0, -$ox, -$oy); |
| 1430 | } |
| 1431 | return true; |
| 1432 | } |
| 1433 | |
| 1434 | /** Whether this box is positioned along an `offset-path`. */ |
| 1435 | private function hasMotionPath(Box $box): bool |
| 1436 | { |
| 1437 | return $this->motionRay($box) !== null |
| 1438 | || $this->motionShape($box) !== null |
| 1439 | || $this->motionCoordBox($box) !== null; |
| 1440 | } |
| 1441 | |
| 1442 | /** |
| 1443 | * The `<basic-shape>` in this box's `offset-path`, if any. As with |
| 1444 | * `ray()`, a trailing `<coord-box>` puts the cascade in a ValueList. |
| 1445 | */ |
| 1446 | private function motionShape(Box $box): ?\Phpdftk\Css\Value\BasicShape |
| 1447 | { |
| 1448 | $value = $box->style->get('offset-path'); |
| 1449 | if ($value instanceof \Phpdftk\Css\Value\BasicShape) { |
| 1450 | return $value; |
| 1451 | } |
| 1452 | if ($value instanceof \Phpdftk\Css\Value\ValueList) { |
| 1453 | foreach ($value->values as $component) { |
| 1454 | if ($component instanceof \Phpdftk\Css\Value\BasicShape) { |
| 1455 | return $component; |
| 1456 | } |
| 1457 | } |
| 1458 | } |
| 1459 | return null; |
| 1460 | } |
| 1461 | |
| 1462 | /** |
| 1463 | * The `ray()` in this box's `offset-path`, if any. `offset-path` may |
| 1464 | * carry a trailing coordinate box (`ray(0deg) padding-box`), in which |
| 1465 | * case the cascade holds a ValueList. |
| 1466 | */ |
| 1467 | private function motionRay(Box $box): ?\Phpdftk\Css\Value\Ray |
| 1468 | { |
| 1469 | $value = $box->style->get('offset-path'); |
| 1470 | if ($value instanceof \Phpdftk\Css\Value\Ray) { |
| 1471 | return $value; |
| 1472 | } |
| 1473 | if ($value instanceof \Phpdftk\Css\Value\ValueList) { |
| 1474 | foreach ($value->values as $component) { |
| 1475 | if ($component instanceof \Phpdftk\Css\Value\Ray) { |
| 1476 | return $component; |
| 1477 | } |
| 1478 | } |
| 1479 | } |
| 1480 | return null; |
| 1481 | } |
| 1482 | |
| 1483 | /** |
| 1484 | * CSS Motion Path 1 §2 — the transform functions that place a box on |
| 1485 | * its `offset-path`. |
| 1486 | * |
| 1487 | * The element's `offset-anchor` is moved onto the point at |
| 1488 | * `offset-distance` along the path, and rotated by `offset-rotate`. |
| 1489 | * `applyBoxTransform` wraps the returned list in |
| 1490 | * `T(origin) … T(-origin)`, so the composition |
| 1491 | * `T(P-O) · R(φ) · T(O-A)` reduces to `T(P) · R(φ) · T(-A)` — mapping |
| 1492 | * the anchor exactly onto the path point. |
| 1493 | * |
| 1494 | * @return list<\Phpdftk\Css\Value\TransformFunction> |
| 1495 | */ |
| 1496 | private function motionPathFunctions(Box $box, ?Box $parent): array |
| 1497 | { |
| 1498 | $placement = $this->motionPlacement($box, $parent); |
| 1499 | if ($placement === null) { |
| 1500 | return []; |
| 1501 | } |
| 1502 | [$px, $py, $tangent] = $placement; |
| 1503 | $phi = $this->resolveMotionRotation($box, $tangent); |
| 1504 | |
| 1505 | [$ox, $oy] = $this->transformOriginCss($box); |
| 1506 | [$ax, $ay] = $this->motionAnchorCss($box, $ox, $oy); |
| 1507 | |
| 1508 | $functions = [$this->pixelTranslate($px - $ox, $py - $oy)]; |
| 1509 | if ($phi !== 0.0) { |
| 1510 | $functions[] = new \Phpdftk\Css\Value\RotateTransform($phi); |
| 1511 | } |
| 1512 | if ($ox !== $ax || $oy !== $ay) { |
| 1513 | $functions[] = $this->pixelTranslate($ox - $ax, $oy - $ay); |
| 1514 | } |
| 1515 | return $functions; |
| 1516 | } |
| 1517 | |
| 1518 | |
| 1519 | /** |
| 1520 | * Where on its `offset-path` a box sits, in CSS page coordinates, |
| 1521 | * together with the path tangent in degrees. |
| 1522 | * |
| 1523 | * @return array{float, float, float}|null |
| 1524 | */ |
| 1525 | private function motionPlacement(Box $box, ?Box $parent): ?array |
| 1526 | { |
| 1527 | [$cbX, $cbY, $cbW, $cbH] = $this->motionReferenceRect($box, $parent); |
| 1528 | |
| 1529 | $ray = $this->motionRay($box); |
| 1530 | if ($ray !== null) { |
| 1531 | $degrees = $this->rayAngleDegrees($ray); |
| 1532 | if ($degrees === null) { |
| 1533 | return null; |
| 1534 | } |
| 1535 | [$sx, $sy] = $this->rayOrigin($box, $ray, $cbX, $cbY, $cbW, $cbH); |
| 1536 | $length = $this->rayLength($box, $ray, $degrees, $sx, $sy, $cbX, $cbY, $cbW, $cbH); |
| 1537 | $distance = $this->resolveMotionDistance($box, $length); |
| 1538 | |
| 1539 | // CSS ray angles are compass BEARINGS: 0deg points UP and |
| 1540 | // positive angles turn clockwise. In CSS coordinates Y grows |
| 1541 | // downward, so the unit vector is (sin θ, -cos θ) — not the |
| 1542 | // (cos, sin) of an ordinary mathematical angle, which would be |
| 1543 | // 90° out. The tangent then trails the bearing by 90°. |
| 1544 | $theta = deg2rad($degrees); |
| 1545 | return [ |
| 1546 | $sx + $distance * sin($theta), |
| 1547 | $sy - $distance * cos($theta), |
| 1548 | $degrees - 90.0, |
| 1549 | ]; |
| 1550 | } |
| 1551 | |
| 1552 | $shape = $this->motionShape($box); |
| 1553 | if ($shape === null) { |
| 1554 | // A lone `<coord-box>` is a complete offset-path: the reference |
| 1555 | // rectangle itself. The reference box's own `border-radius` |
| 1556 | // should round it; square corners are the approximation here. |
| 1557 | $coordBox = $this->motionCoordBox($box); |
| 1558 | if ($coordBox === null) { |
| 1559 | return null; |
| 1560 | } |
| 1561 | return $this->pointAlongPolyline($box, $this->roundedRectPolyline( |
| 1562 | $cbX, |
| 1563 | $cbY, |
| 1564 | $cbW, |
| 1565 | $cbH, |
| 1566 | $this->referenceBoxRadii($parent ?? $box, $coordBox), |
| 1567 | )); |
| 1568 | } |
| 1569 | if ($shape instanceof \Phpdftk\Css\Value\PathShape) { |
| 1570 | // Unlike a <basic-shape>, `path()` is NOT resolved in the |
| 1571 | // reference box: its coordinates are the element's own, so the |
| 1572 | // path hangs off the box's border-box origin. `offset-path- |
| 1573 | // string-003` pins this down — a 200x300 box at (50, 80) with |
| 1574 | // `path('M 50 40')` has to land at (100, 120), which only the |
| 1575 | // element-relative origin produces. |
| 1576 | $g = $box->geometry; |
| 1577 | [$points, $closed] = $this->svgPathPolyline( |
| 1578 | $shape->pathData, |
| 1579 | $g->x - $g->paddingLeft - $g->borderLeft, |
| 1580 | $g->y - $g->paddingTop - $g->borderTop, |
| 1581 | ); |
| 1582 | if ($points === []) { |
| 1583 | return null; |
| 1584 | } |
| 1585 | return $this->pointAlongPolyline($box, $points, $closed); |
| 1586 | } |
| 1587 | $points = $this->motionShapePolyline($box, $shape, $cbX, $cbY, $cbW, $cbH); |
| 1588 | if ($points === []) { |
| 1589 | return null; |
| 1590 | } |
| 1591 | return $this->pointAlongPolyline($box, $points); |
| 1592 | } |
| 1593 | |
| 1594 | /** |
| 1595 | * Walk a closed polyline to the point at `offset-distance`. |
| 1596 | * |
| 1597 | * Sampling every shape into a polyline gives one arc-length |
| 1598 | * parameterisation for all of them: an ellipse's quarter-perimeter has |
| 1599 | * no closed form, and a rounded rectangle mixes straight runs with |
| 1600 | * elliptical arcs, so a cumulative-length table is the honest way to |
| 1601 | * measure both. |
| 1602 | * |
| 1603 | * CSS Motion Path 1 §3.1 — a distance off either end of a CLOSED path |
| 1604 | * wraps around it, while an open path clamps to its endpoints. |
| 1605 | * |
| 1606 | * @param list<array{float, float}> $points |
| 1607 | * @return array{float, float, float} |
| 1608 | */ |
| 1609 | private function pointAlongPolyline(Box $box, array $points, bool $closed = true): array |
| 1610 | { |
| 1611 | $count = count($points); |
| 1612 | $cumulative = [0.0]; |
| 1613 | $total = 0.0; |
| 1614 | for ($i = 1; $i < $count; ++$i) { |
| 1615 | $total += hypot( |
| 1616 | $points[$i][0] - $points[$i - 1][0], |
| 1617 | $points[$i][1] - $points[$i - 1][1], |
| 1618 | ); |
| 1619 | $cumulative[$i] = $total; |
| 1620 | } |
| 1621 | // A degenerate shape — `circle()` centred on an edge resolves |
| 1622 | // `closest-side` to zero — collapses to its single point. |
| 1623 | if ($total <= 0.0 || $count < 2) { |
| 1624 | return [$points[0][0], $points[0][1], 0.0]; |
| 1625 | } |
| 1626 | |
| 1627 | $distance = $this->resolveMotionDistance($box, $total); |
| 1628 | if ($closed) { |
| 1629 | $distance = fmod($distance, $total); |
| 1630 | if ($distance < 0.0) { |
| 1631 | $distance += $total; |
| 1632 | } |
| 1633 | } else { |
| 1634 | $distance = max(0.0, min($total, $distance)); |
| 1635 | } |
| 1636 | |
| 1637 | $index = 1; |
| 1638 | while ($index < $count - 1 && $cumulative[$index] < $distance) { |
| 1639 | ++$index; |
| 1640 | } |
| 1641 | [$x0, $y0] = $points[$index - 1]; |
| 1642 | [$x1, $y1] = $points[$index]; |
| 1643 | $span = $cumulative[$index] - $cumulative[$index - 1]; |
| 1644 | $t = $span > 0.0 ? ($distance - $cumulative[$index - 1]) / $span : 0.0; |
| 1645 | |
| 1646 | return [ |
| 1647 | $x0 + ($x1 - $x0) * $t, |
| 1648 | $y0 + ($y1 - $y0) * $t, |
| 1649 | rad2deg(atan2($y1 - $y0, $x1 - $x0)), |
| 1650 | ]; |
| 1651 | } |
| 1652 | |
| 1653 | /** |
| 1654 | * Sample a `<basic-shape>` offset-path into a closed polyline, in CSS |
| 1655 | * page coordinates. |
| 1656 | * |
| 1657 | * Every shape starts where its conversion to a path starts and winds |
| 1658 | * clockwise: circles and ellipses from 3 o'clock, the rectangle family |
| 1659 | * from the top-left corner, and a polygon from its first vertex. |
| 1660 | * |
| 1661 | * @return list<array{float, float}> |
| 1662 | */ |
| 1663 | private function motionShapePolyline( |
| 1664 | Box $box, |
| 1665 | \Phpdftk\Css\Value\BasicShape $shape, |
| 1666 | float $cbX, |
| 1667 | float $cbY, |
| 1668 | float $cbW, |
| 1669 | float $cbH, |
| 1670 | ): array { |
| 1671 | if ($shape instanceof \Phpdftk\Css\Value\CircleShape) { |
| 1672 | [$cx, $cy] = $this->shapeCentre( |
| 1673 | $box, |
| 1674 | $shape->centerX, |
| 1675 | $shape->centerY, |
| 1676 | $cbX, |
| 1677 | $cbY, |
| 1678 | $cbW, |
| 1679 | $cbH, |
| 1680 | ); |
| 1681 | $radius = $this->shapeRadius( |
| 1682 | $shape->radius, |
| 1683 | $cx, |
| 1684 | $cy, |
| 1685 | $cbX, |
| 1686 | $cbY, |
| 1687 | $cbW, |
| 1688 | $cbH, |
| 1689 | null, |
| 1690 | ); |
| 1691 | return $this->ellipsePolyline($cx, $cy, $radius, $radius); |
| 1692 | } |
| 1693 | if ($shape instanceof \Phpdftk\Css\Value\EllipseShape) { |
| 1694 | [$cx, $cy] = $this->shapeCentre( |
| 1695 | $box, |
| 1696 | $shape->centerX, |
| 1697 | $shape->centerY, |
| 1698 | $cbX, |
| 1699 | $cbY, |
| 1700 | $cbW, |
| 1701 | $cbH, |
| 1702 | ); |
| 1703 | $rx = $this->shapeRadius($shape->radiusX, $cx, $cy, $cbX, $cbY, $cbW, $cbH, true); |
| 1704 | $ry = $this->shapeRadius($shape->radiusY, $cx, $cy, $cbX, $cbY, $cbW, $cbH, false); |
| 1705 | return $this->ellipsePolyline($cx, $cy, $rx, $ry); |
| 1706 | } |
| 1707 | if ($shape instanceof \Phpdftk\Css\Value\PolygonShape) { |
| 1708 | $points = []; |
| 1709 | foreach ($shape->vertices as $vertex) { |
| 1710 | $points[] = [ |
| 1711 | $cbX + $this->resolvePositionComponent($vertex[0], $cbW, true), |
| 1712 | $cbY + $this->resolvePositionComponent($vertex[1], $cbH, false), |
| 1713 | ]; |
| 1714 | } |
| 1715 | if (count($points) < 2) { |
| 1716 | return $points; |
| 1717 | } |
| 1718 | $points[] = $points[0]; |
| 1719 | return $points; |
| 1720 | } |
| 1721 | |
| 1722 | $rect = $this->motionShapeRect($shape, $cbX, $cbY, $cbW, $cbH); |
| 1723 | if ($rect === null) { |
| 1724 | return []; |
| 1725 | } |
| 1726 | [$left, $top, $width, $height, $radii] = $rect; |
| 1727 | return $this->roundedRectPolyline($left, $top, $width, $height, $radii); |
| 1728 | } |
| 1729 | |
| 1730 | |
| 1731 | /** |
| 1732 | * The centre of a `circle()` / `ellipse()` offset-path. |
| 1733 | * |
| 1734 | * An omitted `at <position>` does NOT default to the reference box's |
| 1735 | * centre the way it does for `clip-path` — CSS Motion Path 1 §2 makes |
| 1736 | * `offset-position` the default, so `circle()` with |
| 1737 | * `offset-position: auto` is centred on the box's own corner. |
| 1738 | * |
| 1739 | * @return array{float, float} |
| 1740 | */ |
| 1741 | private function shapeCentre( |
| 1742 | Box $box, |
| 1743 | ?\Phpdftk\Css\Value\Value $centerX, |
| 1744 | ?\Phpdftk\Css\Value\Value $centerY, |
| 1745 | float $cbX, |
| 1746 | float $cbY, |
| 1747 | float $cbW, |
| 1748 | float $cbH, |
| 1749 | ): array { |
| 1750 | if ($centerX !== null && $centerY !== null) { |
| 1751 | return [ |
| 1752 | $cbX + $this->resolvePositionComponent($centerX, $cbW, true), |
| 1753 | $cbY + $this->resolvePositionComponent($centerY, $cbH, false), |
| 1754 | ]; |
| 1755 | } |
| 1756 | return $this->offsetPositionPoint($box, $cbX, $cbY, $cbW, $cbH); |
| 1757 | } |
| 1758 | |
| 1759 | /** |
| 1760 | * `offset-position` in CSS page coordinates. `auto` is the box's own |
| 1761 | * border-box origin; `normal` — the initial value — is the centre of |
| 1762 | * the containing block. |
| 1763 | * |
| 1764 | * @return array{float, float} |
| 1765 | */ |
| 1766 | private function offsetPositionPoint( |
| 1767 | Box $box, |
| 1768 | float $cbX, |
| 1769 | float $cbY, |
| 1770 | float $cbW, |
| 1771 | float $cbH, |
| 1772 | ): array { |
| 1773 | $position = $box->style->get('offset-position'); |
| 1774 | if ($position instanceof Keyword && strtolower($position->name) === 'auto') { |
| 1775 | $g = $box->geometry; |
| 1776 | return [ |
| 1777 | $g->x - $g->paddingLeft - $g->borderLeft, |
| 1778 | $g->y - $g->paddingTop - $g->borderTop, |
| 1779 | ]; |
| 1780 | } |
| 1781 | if ($position instanceof \Phpdftk\Css\Value\ValueList |
| 1782 | && count($position->values) >= 2 |
| 1783 | ) { |
| 1784 | return [ |
| 1785 | $cbX + $this->resolvePositionComponent($position->values[0], $cbW, true), |
| 1786 | $cbY + $this->resolvePositionComponent($position->values[1], $cbH, false), |
| 1787 | ]; |
| 1788 | } |
| 1789 | return [$cbX + $cbW / 2.0, $cbY + $cbH / 2.0]; |
| 1790 | } |
| 1791 | |
| 1792 | /** |
| 1793 | * One radius of a `circle()` / `ellipse()`. |
| 1794 | * |
| 1795 | * `$horizontal` picks the axis for an ellipse; `null` marks a circle, |
| 1796 | * whose percentage radius resolves against the reference box's |
| 1797 | * diagonal per CSS Shapes 1 §5 rather than against one side. |
| 1798 | */ |
| 1799 | private function shapeRadius( |
| 1800 | ?\Phpdftk\Css\Value\Value $radius, |
| 1801 | float $cx, |
| 1802 | float $cy, |
| 1803 | float $cbX, |
| 1804 | float $cbY, |
| 1805 | float $cbW, |
| 1806 | float $cbH, |
| 1807 | ?bool $horizontal, |
| 1808 | ): float { |
| 1809 | $left = abs($cx - $cbX); |
| 1810 | $right = abs($cbX + $cbW - $cx); |
| 1811 | $top = abs($cy - $cbY); |
| 1812 | $bottom = abs($cbY + $cbH - $cy); |
| 1813 | |
| 1814 | $keyword = null; |
| 1815 | if ($radius === null) { |
| 1816 | $keyword = 'closest-side'; |
| 1817 | } elseif ($radius instanceof Keyword) { |
| 1818 | $keyword = strtolower($radius->name); |
| 1819 | } |
| 1820 | if ($keyword !== null) { |
| 1821 | $sides = $horizontal === null |
| 1822 | ? [$left, $right, $top, $bottom] |
| 1823 | : ($horizontal ? [$left, $right] : [$top, $bottom]); |
| 1824 | $corners = [ |
| 1825 | hypot($left, $top), |
| 1826 | hypot($right, $top), |
| 1827 | hypot($left, $bottom), |
| 1828 | hypot($right, $bottom), |
| 1829 | ]; |
| 1830 | return match ($keyword) { |
| 1831 | 'farthest-side' => max($sides), |
| 1832 | 'closest-corner' => min($corners), |
| 1833 | 'farthest-corner' => max($corners), |
| 1834 | default => min($sides), |
| 1835 | }; |
| 1836 | } |
| 1837 | if ($radius instanceof \Phpdftk\Css\Value\Percentage) { |
| 1838 | $basis = match ($horizontal) { |
| 1839 | true => $cbW, |
| 1840 | false => $cbH, |
| 1841 | // CSS Shapes 1 §5: sqrt(w² + h²) / sqrt(2). |
| 1842 | null => sqrt(($cbW * $cbW + $cbH * $cbH) / 2.0), |
| 1843 | }; |
| 1844 | return abs($basis * $radius->value / 100.0); |
| 1845 | } |
| 1846 | return abs($this->resolvePositionComponent( |
| 1847 | $radius, |
| 1848 | $horizontal === false ? $cbH : $cbW, |
| 1849 | $horizontal !== false, |
| 1850 | )); |
| 1851 | } |
| 1852 | |
| 1853 | /** |
| 1854 | * Resolve `inset()` / `rect()` / `xywh()` to a rectangle plus its four |
| 1855 | * corner radii, in CSS page coordinates. |
| 1856 | * |
| 1857 | * @return array{float, float, float, float, list<array{float, float}>}|null |
| 1858 | */ |
| 1859 | private function motionShapeRect( |
| 1860 | \Phpdftk\Css\Value\BasicShape $shape, |
| 1861 | float $cbX, |
| 1862 | float $cbY, |
| 1863 | float $cbW, |
| 1864 | float $cbH, |
| 1865 | ): ?array { |
| 1866 | $radiiSource = null; |
| 1867 | if ($shape instanceof \Phpdftk\Css\Value\InsetShape) { |
| 1868 | $edges = $this->expandBoxSides($shape->insets); |
| 1869 | $top = $this->resolvePositionComponent($edges[0], $cbH, false); |
| 1870 | $right = $this->resolvePositionComponent($edges[1], $cbW, true); |
| 1871 | $bottom = $this->resolvePositionComponent($edges[2], $cbH, false); |
| 1872 | $left = $this->resolvePositionComponent($edges[3], $cbW, true); |
| 1873 | $x0 = $cbX + $left; |
| 1874 | $y0 = $cbY + $top; |
| 1875 | $x1 = $cbX + $cbW - $right; |
| 1876 | $y1 = $cbY + $cbH - $bottom; |
| 1877 | $radiiSource = $shape->borderRadius; |
| 1878 | } elseif ($shape instanceof \Phpdftk\Css\Value\RectShape) { |
| 1879 | // `rect()` edges are offsets from the reference box's top-left, |
| 1880 | // not insets from each side, and `auto` means that box's own |
| 1881 | // edge. |
| 1882 | $edges = $this->expandBoxSides($shape->edges); |
| 1883 | $top = $this->motionRectEdge($edges[0], $cbH, false, 0.0); |
| 1884 | $right = $this->motionRectEdge($edges[1], $cbW, true, $cbW); |
| 1885 | $bottom = $this->motionRectEdge($edges[2], $cbH, false, $cbH); |
| 1886 | $left = $this->motionRectEdge($edges[3], $cbW, true, 0.0); |
| 1887 | $x0 = $cbX + $left; |
| 1888 | $y0 = $cbY + $top; |
| 1889 | $x1 = $cbX + $right; |
| 1890 | $y1 = $cbY + $bottom; |
| 1891 | $radiiSource = $shape->borderRadius; |
| 1892 | } elseif ($shape instanceof \Phpdftk\Css\Value\XywhShape) { |
| 1893 | $x0 = $cbX + $this->resolvePositionComponent($shape->x, $cbW, true); |
| 1894 | $y0 = $cbY + $this->resolvePositionComponent($shape->y, $cbH, false); |
| 1895 | $x1 = $x0 + $this->resolvePositionComponent($shape->width, $cbW, true); |
| 1896 | $y1 = $y0 + $this->resolvePositionComponent($shape->height, $cbH, false); |
| 1897 | $radiiSource = $shape->borderRadius; |
| 1898 | } else { |
| 1899 | return null; |
| 1900 | } |
| 1901 | |
| 1902 | $left = min($x0, $x1); |
| 1903 | $top = min($y0, $y1); |
| 1904 | $width = abs($x1 - $x0); |
| 1905 | $height = abs($y1 - $y0); |
| 1906 | $radii = $this->shapeCornerRadii($radiiSource, $width, $height); |
| 1907 | |
| 1908 | return [$left, $top, $width, $height, $radii]; |
| 1909 | } |
| 1910 | |
| 1911 | /** One `rect()` edge, where `auto` falls back to the reference box. */ |
| 1912 | private function motionRectEdge( |
| 1913 | \Phpdftk\Css\Value\Value $value, |
| 1914 | float $extent, |
| 1915 | bool $horizontal, |
| 1916 | float $auto, |
| 1917 | ): float { |
| 1918 | if ($value instanceof Keyword && strtolower($value->name) === 'auto') { |
| 1919 | return $auto; |
| 1920 | } |
| 1921 | return $this->resolvePositionComponent($value, $extent, $horizontal); |
| 1922 | } |
| 1923 | |
| 1924 | /** |
| 1925 | * Expand a 1-to-4 value box-side list to the full top/right/bottom/left |
| 1926 | * quartet. |
| 1927 | * |
| 1928 | * @param list<\Phpdftk\Css\Value\Value> $values |
| 1929 | * @return array{ |
| 1930 | * \Phpdftk\Css\Value\Value, |
| 1931 | * \Phpdftk\Css\Value\Value, |
| 1932 | * \Phpdftk\Css\Value\Value, |
| 1933 | * \Phpdftk\Css\Value\Value |
| 1934 | * } |
| 1935 | */ |
| 1936 | private function expandBoxSides(array $values): array |
| 1937 | { |
| 1938 | return match (count($values)) { |
| 1939 | 1 => [$values[0], $values[0], $values[0], $values[0]], |
| 1940 | 2 => [$values[0], $values[1], $values[0], $values[1]], |
| 1941 | 3 => [$values[0], $values[1], $values[2], $values[1]], |
| 1942 | default => [$values[0], $values[1], $values[2], $values[3]], |
| 1943 | }; |
| 1944 | } |
| 1945 | |
| 1946 | /** |
| 1947 | * The four `[rx, ry]` corner radii of a `round <border-radius>` clause, |
| 1948 | * clockwise from the top-left, scaled down together if adjacent radii |
| 1949 | * would overlap (CSS Backgrounds 3 §5.5). |
| 1950 | * |
| 1951 | * @param ?array<int, mixed> $radiusSource |
| 1952 | * @return list<array{float, float}> |
| 1953 | */ |
| 1954 | private function shapeCornerRadii(?array $radiusSource, float $width, float $height): array |
| 1955 | { |
| 1956 | if ($radiusSource === null || $radiusSource === []) { |
| 1957 | return [[0.0, 0.0], [0.0, 0.0], [0.0, 0.0], [0.0, 0.0]]; |
| 1958 | } |
| 1959 | $horizontal = []; |
| 1960 | $vertical = []; |
| 1961 | foreach ($radiusSource as $entry) { |
| 1962 | if (is_array($entry) && count($entry) >= 2) { |
| 1963 | $horizontal[] = $entry[0]; |
| 1964 | $vertical[] = $entry[1]; |
| 1965 | continue; |
| 1966 | } |
| 1967 | if ($entry instanceof \Phpdftk\Css\Value\Value) { |
| 1968 | $horizontal[] = $entry; |
| 1969 | $vertical[] = $entry; |
| 1970 | } |
| 1971 | } |
| 1972 | if ($horizontal === []) { |
| 1973 | return [[0.0, 0.0], [0.0, 0.0], [0.0, 0.0], [0.0, 0.0]]; |
| 1974 | } |
| 1975 | $hx = $this->expandCornerList($horizontal); |
| 1976 | $vy = $this->expandCornerList($vertical); |
| 1977 | |
| 1978 | $radii = []; |
| 1979 | for ($i = 0; $i < 4; ++$i) { |
| 1980 | $radii[] = [ |
| 1981 | abs($this->resolvePositionComponent($hx[$i], $width, true)), |
| 1982 | abs($this->resolvePositionComponent($vy[$i], $height, false)), |
| 1983 | ]; |
| 1984 | } |
| 1985 | |
| 1986 | // Uniform down-scale when opposing radii overshoot an edge. |
| 1987 | $scale = 1.0; |
| 1988 | foreach ([ |
| 1989 | [$radii[0][0] + $radii[1][0], $width], |
| 1990 | [$radii[3][0] + $radii[2][0], $width], |
| 1991 | [$radii[0][1] + $radii[3][1], $height], |
| 1992 | [$radii[1][1] + $radii[2][1], $height], |
| 1993 | ] as [$sum, $extent]) { |
| 1994 | if ($sum > 0.0 && $sum > $extent) { |
| 1995 | $scale = min($scale, $extent / $sum); |
| 1996 | } |
| 1997 | } |
| 1998 | if ($scale < 1.0) { |
| 1999 | foreach ($radii as $i => [$rx, $ry]) { |
| 2000 | $radii[$i] = [$rx * $scale, $ry * $scale]; |
| 2001 | } |
| 2002 | } |
| 2003 | return $radii; |
| 2004 | } |
| 2005 | |
| 2006 | /** |
| 2007 | * Expand a 1-to-4 value corner list to all four corners. |
| 2008 | * |
| 2009 | * @param list<\Phpdftk\Css\Value\Value> $values |
| 2010 | * @return array{ |
| 2011 | * \Phpdftk\Css\Value\Value, |
| 2012 | * \Phpdftk\Css\Value\Value, |
| 2013 | * \Phpdftk\Css\Value\Value, |
| 2014 | * \Phpdftk\Css\Value\Value |
| 2015 | * } |
| 2016 | */ |
| 2017 | private function expandCornerList(array $values): array |
| 2018 | { |
| 2019 | return match (count($values)) { |
| 2020 | 1 => [$values[0], $values[0], $values[0], $values[0]], |
| 2021 | 2 => [$values[0], $values[1], $values[0], $values[1]], |
| 2022 | 3 => [$values[0], $values[1], $values[2], $values[1]], |
| 2023 | default => [$values[0], $values[1], $values[2], $values[3]], |
| 2024 | }; |
| 2025 | } |
| 2026 | |
| 2027 | /** |
| 2028 | * An ellipse sampled clockwise from 3 o'clock, closed. |
| 2029 | * |
| 2030 | * @return list<array{float, float}> |
| 2031 | */ |
| 2032 | private function ellipsePolyline(float $cx, float $cy, float $rx, float $ry): array |
| 2033 | { |
| 2034 | if ($rx <= 0.0 && $ry <= 0.0) { |
| 2035 | return [[$cx, $cy]]; |
| 2036 | } |
| 2037 | $steps = 720; |
| 2038 | $points = []; |
| 2039 | for ($i = 0; $i <= $steps; ++$i) { |
| 2040 | $angle = 2.0 * M_PI * $i / $steps; |
| 2041 | $points[] = [$cx + $rx * cos($angle), $cy + $ry * sin($angle)]; |
| 2042 | } |
| 2043 | return $points; |
| 2044 | } |
| 2045 | |
| 2046 | /** |
| 2047 | * A rectangle sampled clockwise from the top-left, closed. Non-zero |
| 2048 | * corner radii become elliptical arcs, so the path starts where the |
| 2049 | * top edge does rather than at the (cut away) corner itself. |
| 2050 | * |
| 2051 | * @param list<array{float, float}> $radii |
| 2052 | * @return list<array{float, float}> |
| 2053 | */ |
| 2054 | private function roundedRectPolyline( |
| 2055 | float $left, |
| 2056 | float $top, |
| 2057 | float $width, |
| 2058 | float $height, |
| 2059 | array $radii, |
| 2060 | ): array { |
| 2061 | $right = $left + $width; |
| 2062 | $bottom = $top + $height; |
| 2063 | if ($width <= 0.0 && $height <= 0.0) { |
| 2064 | return [[$left, $top]]; |
| 2065 | } |
| 2066 | [$tl, $tr, $br, $bl] = $radii; |
| 2067 | $rounded = false; |
| 2068 | foreach ($radii as [$rx, $ry]) { |
| 2069 | if ($rx > 0.0 || $ry > 0.0) { |
| 2070 | $rounded = true; |
| 2071 | break; |
| 2072 | } |
| 2073 | } |
| 2074 | if (!$rounded) { |
| 2075 | return [ |
| 2076 | [$left, $top], |
| 2077 | [$right, $top], |
| 2078 | [$right, $bottom], |
| 2079 | [$left, $bottom], |
| 2080 | [$left, $top], |
| 2081 | ]; |
| 2082 | } |
| 2083 | |
| 2084 | $arcSteps = 24; |
| 2085 | $points = [[$left + $tl[0], $top]]; |
| 2086 | // Each corner arc sweeps a quarter turn clockwise, from the end of |
| 2087 | // the incoming edge to the start of the outgoing one. |
| 2088 | foreach ([ |
| 2089 | [$right - $tr[0], $top, $tr, $right - $tr[0], $top + $tr[1], -M_PI / 2.0], |
| 2090 | [$right, $bottom - $br[1], $br, $right - $br[0], $bottom - $br[1], 0.0], |
| 2091 | [$left + $bl[0], $bottom, $bl, $left + $bl[0], $bottom - $bl[1], M_PI / 2.0], |
| 2092 | [$left, $top + $tl[1], $tl, $left + $tl[0], $top + $tl[1], M_PI], |
| 2093 | ] as [$edgeX, $edgeY, $radius, $arcCx, $arcCy, $start]) { |
| 2094 | $points[] = [$edgeX, $edgeY]; |
| 2095 | if ($radius[0] <= 0.0 && $radius[1] <= 0.0) { |
| 2096 | continue; |
| 2097 | } |
| 2098 | for ($i = 1; $i <= $arcSteps; ++$i) { |
| 2099 | $angle = $start + (M_PI / 2.0) * $i / $arcSteps; |
| 2100 | $points[] = [ |
| 2101 | $arcCx + $radius[0] * cos($angle), |
| 2102 | $arcCy + $radius[1] * sin($angle), |
| 2103 | ]; |
| 2104 | } |
| 2105 | } |
| 2106 | return $points; |
| 2107 | } |
| 2108 | |
| 2109 | |
| 2110 | /** |
| 2111 | * Flatten SVG path data into a polyline, in CSS page coordinates |
| 2112 | * anchored at the reference box's origin. |
| 2113 | * |
| 2114 | * Returns the points and whether the path closed, which decides |
| 2115 | * whether `offset-distance` wraps or clamps. |
| 2116 | * |
| 2117 | * A second subpath ends the walk: `offset-distance` measures one |
| 2118 | * continuous run, and stitching disjoint subpaths would invent |
| 2119 | * segments across the gaps that the author never drew. |
| 2120 | * |
| 2121 | * @return array{list<array{float, float}>, bool} |
| 2122 | */ |
| 2123 | private function svgPathPolyline(string $pathData, float $originX, float $originY): array |
| 2124 | { |
| 2125 | $commands = \Phpdftk\Svg\Path\PathData::parse($pathData)->commands; |
| 2126 | |
| 2127 | $points = []; |
| 2128 | $x = 0.0; |
| 2129 | $y = 0.0; |
| 2130 | $startX = 0.0; |
| 2131 | $startY = 0.0; |
| 2132 | $closed = false; |
| 2133 | // Reflection state for the smooth curve commands. |
| 2134 | $lastCubic = null; |
| 2135 | $lastQuadratic = null; |
| 2136 | $started = false; |
| 2137 | |
| 2138 | $push = static function (float $px, float $py) use (&$points, $originX, $originY): void { |
| 2139 | $points[] = [$originX + $px, $originY + $py]; |
| 2140 | }; |
| 2141 | |
| 2142 | foreach ($commands as $command) { |
| 2143 | $absolute = $command->absolute; |
| 2144 | $baseX = $absolute ? 0.0 : $x; |
| 2145 | $baseY = $absolute ? 0.0 : $y; |
| 2146 | $cubic = null; |
| 2147 | $quadratic = null; |
| 2148 | |
| 2149 | if ($command instanceof \Phpdftk\Svg\Path\MoveTo) { |
| 2150 | if ($started) { |
| 2151 | break; |
| 2152 | } |
| 2153 | $x = $baseX + $command->x; |
| 2154 | $y = $baseY + $command->y; |
| 2155 | $startX = $x; |
| 2156 | $startY = $y; |
| 2157 | $started = true; |
| 2158 | $push($x, $y); |
| 2159 | } elseif ($command instanceof \Phpdftk\Svg\Path\LineTo) { |
| 2160 | $x = $baseX + $command->x; |
| 2161 | $y = $baseY + $command->y; |
| 2162 | $push($x, $y); |
| 2163 | } elseif ($command instanceof \Phpdftk\Svg\Path\HorizontalLineTo) { |
| 2164 | $x = $baseX + $command->x; |
| 2165 | $push($x, $y); |
| 2166 | } elseif ($command instanceof \Phpdftk\Svg\Path\VerticalLineTo) { |
| 2167 | $y = $baseY + $command->y; |
| 2168 | $push($x, $y); |
| 2169 | } elseif ($command instanceof \Phpdftk\Svg\Path\CurveTo) { |
| 2170 | $c1x = $baseX + $command->x1; |
| 2171 | $c1y = $baseY + $command->y1; |
| 2172 | $c2x = $baseX + $command->x2; |
| 2173 | $c2y = $baseY + $command->y2; |
| 2174 | $ex = $baseX + $command->x; |
| 2175 | $ey = $baseY + $command->y; |
| 2176 | foreach ($this->cubicSamples($x, $y, $c1x, $c1y, $c2x, $c2y, $ex, $ey) as [$sx, $sy]) { |
| 2177 | $push($sx, $sy); |
| 2178 | } |
| 2179 | $cubic = [$c2x, $c2y]; |
| 2180 | $x = $ex; |
| 2181 | $y = $ey; |
| 2182 | } elseif ($command instanceof \Phpdftk\Svg\Path\SmoothCurveTo) { |
| 2183 | [$c1x, $c1y] = $lastCubic !== null |
| 2184 | ? [2.0 * $x - $lastCubic[0], 2.0 * $y - $lastCubic[1]] |
| 2185 | : [$x, $y]; |
| 2186 | $c2x = $baseX + $command->x2; |
| 2187 | $c2y = $baseY + $command->y2; |
| 2188 | $ex = $baseX + $command->x; |
| 2189 | $ey = $baseY + $command->y; |
| 2190 | foreach ($this->cubicSamples($x, $y, $c1x, $c1y, $c2x, $c2y, $ex, $ey) as [$sx, $sy]) { |
| 2191 | $push($sx, $sy); |
| 2192 | } |
| 2193 | $cubic = [$c2x, $c2y]; |
| 2194 | $x = $ex; |
| 2195 | $y = $ey; |
| 2196 | } elseif ($command instanceof \Phpdftk\Svg\Path\QuadraticCurveTo) { |
| 2197 | $qx = $baseX + $command->x1; |
| 2198 | $qy = $baseY + $command->y1; |
| 2199 | $ex = $baseX + $command->x; |
| 2200 | $ey = $baseY + $command->y; |
| 2201 | foreach ($this->quadraticSamples($x, $y, $qx, $qy, $ex, $ey) as [$sx, $sy]) { |
| 2202 | $push($sx, $sy); |
| 2203 | } |
| 2204 | $quadratic = [$qx, $qy]; |
| 2205 | $x = $ex; |
| 2206 | $y = $ey; |
| 2207 | } elseif ($command instanceof \Phpdftk\Svg\Path\SmoothQuadraticCurveTo) { |
| 2208 | [$qx, $qy] = $lastQuadratic !== null |
| 2209 | ? [2.0 * $x - $lastQuadratic[0], 2.0 * $y - $lastQuadratic[1]] |
| 2210 | : [$x, $y]; |
| 2211 | $ex = $baseX + $command->x; |
| 2212 | $ey = $baseY + $command->y; |
| 2213 | foreach ($this->quadraticSamples($x, $y, $qx, $qy, $ex, $ey) as [$sx, $sy]) { |
| 2214 | $push($sx, $sy); |
| 2215 | } |
| 2216 | $quadratic = [$qx, $qy]; |
| 2217 | $x = $ex; |
| 2218 | $y = $ey; |
| 2219 | } elseif ($command instanceof \Phpdftk\Svg\Path\ArcTo) { |
| 2220 | $ex = $baseX + $command->x; |
| 2221 | $ey = $baseY + $command->y; |
| 2222 | foreach ($this->arcSamples( |
| 2223 | $x, |
| 2224 | $y, |
| 2225 | $command->rx, |
| 2226 | $command->ry, |
| 2227 | $command->xAxisRotation, |
| 2228 | $command->largeArc, |
| 2229 | $command->sweep, |
| 2230 | $ex, |
| 2231 | $ey, |
| 2232 | ) as [$sx, $sy]) { |
| 2233 | $push($sx, $sy); |
| 2234 | } |
| 2235 | $x = $ex; |
| 2236 | $y = $ey; |
| 2237 | } elseif ($command instanceof \Phpdftk\Svg\Path\ClosePath) { |
| 2238 | $push($startX, $startY); |
| 2239 | $x = $startX; |
| 2240 | $y = $startY; |
| 2241 | $closed = true; |
| 2242 | } |
| 2243 | |
| 2244 | $lastCubic = $cubic; |
| 2245 | $lastQuadratic = $quadratic; |
| 2246 | } |
| 2247 | |
| 2248 | return [$points, $closed]; |
| 2249 | } |
| 2250 | |
| 2251 | /** |
| 2252 | * Points along a cubic Bézier, excluding its start. |
| 2253 | * |
| 2254 | * @return list<array{float, float}> |
| 2255 | */ |
| 2256 | private function cubicSamples( |
| 2257 | float $x0, |
| 2258 | float $y0, |
| 2259 | float $x1, |
| 2260 | float $y1, |
| 2261 | float $x2, |
| 2262 | float $y2, |
| 2263 | float $x3, |
| 2264 | float $y3, |
| 2265 | ): array { |
| 2266 | $steps = 32; |
| 2267 | $samples = []; |
| 2268 | for ($i = 1; $i <= $steps; ++$i) { |
| 2269 | $t = $i / $steps; |
| 2270 | $u = 1.0 - $t; |
| 2271 | $a = $u * $u * $u; |
| 2272 | $b = 3.0 * $u * $u * $t; |
| 2273 | $c = 3.0 * $u * $t * $t; |
| 2274 | $d = $t * $t * $t; |
| 2275 | $samples[] = [ |
| 2276 | $a * $x0 + $b * $x1 + $c * $x2 + $d * $x3, |
| 2277 | $a * $y0 + $b * $y1 + $c * $y2 + $d * $y3, |
| 2278 | ]; |
| 2279 | } |
| 2280 | return $samples; |
| 2281 | } |
| 2282 | |
| 2283 | /** |
| 2284 | * Points along a quadratic Bézier, excluding its start. |
| 2285 | * |
| 2286 | * @return list<array{float, float}> |
| 2287 | */ |
| 2288 | private function quadraticSamples( |
| 2289 | float $x0, |
| 2290 | float $y0, |
| 2291 | float $x1, |
| 2292 | float $y1, |
| 2293 | float $x2, |
| 2294 | float $y2, |
| 2295 | ): array { |
| 2296 | $steps = 24; |
| 2297 | $samples = []; |
| 2298 | for ($i = 1; $i <= $steps; ++$i) { |
| 2299 | $t = $i / $steps; |
| 2300 | $u = 1.0 - $t; |
| 2301 | $samples[] = [ |
| 2302 | $u * $u * $x0 + 2.0 * $u * $t * $x1 + $t * $t * $x2, |
| 2303 | $u * $u * $y0 + 2.0 * $u * $t * $y1 + $t * $t * $y2, |
| 2304 | ]; |
| 2305 | } |
| 2306 | return $samples; |
| 2307 | } |
| 2308 | |
| 2309 | /** |
| 2310 | * Points along an SVG elliptical arc, excluding its start. |
| 2311 | * |
| 2312 | * Implements the endpoint-to-centre conversion of SVG 2 §B.2.4, |
| 2313 | * including the §B.2.5 correction that scales up radii too small to |
| 2314 | * span the two endpoints. |
| 2315 | * |
| 2316 | * @return list<array{float, float}> |
| 2317 | */ |
| 2318 | private function arcSamples( |
| 2319 | float $x0, |
| 2320 | float $y0, |
| 2321 | float $rx, |
| 2322 | float $ry, |
| 2323 | float $rotationDegrees, |
| 2324 | bool $largeArc, |
| 2325 | bool $sweep, |
| 2326 | float $x1, |
| 2327 | float $y1, |
| 2328 | ): array { |
| 2329 | $rx = abs($rx); |
| 2330 | $ry = abs($ry); |
| 2331 | // Degenerate radii make the arc a straight line (SVG 2 §B.2.5). |
| 2332 | if ($rx == 0.0 || $ry == 0.0 || ($x0 == $x1 && $y0 == $y1)) { |
| 2333 | return [[$x1, $y1]]; |
| 2334 | } |
| 2335 | |
| 2336 | $phi = deg2rad($rotationDegrees); |
| 2337 | $cosPhi = cos($phi); |
| 2338 | $sinPhi = sin($phi); |
| 2339 | |
| 2340 | $dx = ($x0 - $x1) / 2.0; |
| 2341 | $dy = ($y0 - $y1) / 2.0; |
| 2342 | $x1p = $cosPhi * $dx + $sinPhi * $dy; |
| 2343 | $y1p = -$sinPhi * $dx + $cosPhi * $dy; |
| 2344 | |
| 2345 | $lambda = ($x1p * $x1p) / ($rx * $rx) + ($y1p * $y1p) / ($ry * $ry); |
| 2346 | if ($lambda > 1.0) { |
| 2347 | $scale = sqrt($lambda); |
| 2348 | $rx *= $scale; |
| 2349 | $ry *= $scale; |
| 2350 | } |
| 2351 | |
| 2352 | $numerator = $rx * $rx * $ry * $ry |
| 2353 | - $rx * $rx * $y1p * $y1p |
| 2354 | - $ry * $ry * $x1p * $x1p; |
| 2355 | $denominator = $rx * $rx * $y1p * $y1p + $ry * $ry * $x1p * $x1p; |
| 2356 | $factor = $denominator == 0.0 ? 0.0 : sqrt(max(0.0, $numerator / $denominator)); |
| 2357 | if ($largeArc === $sweep) { |
| 2358 | $factor = -$factor; |
| 2359 | } |
| 2360 | $cxp = $factor * $rx * $y1p / $ry; |
| 2361 | $cyp = -$factor * $ry * $x1p / $rx; |
| 2362 | |
| 2363 | $cx = $cosPhi * $cxp - $sinPhi * $cyp + ($x0 + $x1) / 2.0; |
| 2364 | $cy = $sinPhi * $cxp + $cosPhi * $cyp + ($y0 + $y1) / 2.0; |
| 2365 | |
| 2366 | $startAngle = atan2(($y1p - $cyp) / $ry, ($x1p - $cxp) / $rx); |
| 2367 | $endAngle = atan2((-$y1p - $cyp) / $ry, (-$x1p - $cxp) / $rx); |
| 2368 | $sweepAngle = $endAngle - $startAngle; |
| 2369 | if (!$sweep && $sweepAngle > 0.0) { |
| 2370 | $sweepAngle -= 2.0 * M_PI; |
| 2371 | } elseif ($sweep && $sweepAngle < 0.0) { |
| 2372 | $sweepAngle += 2.0 * M_PI; |
| 2373 | } |
| 2374 | |
| 2375 | $steps = max(8, (int) ceil(abs($sweepAngle) / (M_PI / 24.0))); |
| 2376 | $samples = []; |
| 2377 | for ($i = 1; $i <= $steps; ++$i) { |
| 2378 | $angle = $startAngle + $sweepAngle * $i / $steps; |
| 2379 | $ex = $rx * cos($angle); |
| 2380 | $ey = $ry * sin($angle); |
| 2381 | $samples[] = [ |
| 2382 | $cx + $cosPhi * $ex - $sinPhi * $ey, |
| 2383 | $cy + $sinPhi * $ex + $cosPhi * $ey, |
| 2384 | ]; |
| 2385 | } |
| 2386 | return $samples; |
| 2387 | } |
| 2388 | |
| 2389 | private function pixelTranslate(float $dx, float $dy): \Phpdftk\Css\Value\TranslateTransform |
| 2390 | { |
| 2391 | return new \Phpdftk\Css\Value\TranslateTransform( |
| 2392 | new \Phpdftk\Css\Value\Length($dx, \Phpdftk\Css\Value\LengthUnit::Px), |
| 2393 | new \Phpdftk\Css\Value\Length($dy, \Phpdftk\Css\Value\LengthUnit::Px), |
| 2394 | ); |
| 2395 | } |
| 2396 | |
| 2397 | /** |
| 2398 | * A finite bearing in degrees. Enormous authored angles are wrapped |
| 2399 | * before they reach `sin()` / `cos()`, and non-finite values (which a |
| 2400 | * bad `calc()` can produce) disable the path rather than emitting a |
| 2401 | * NaN matrix that would corrupt the content stream. |
| 2402 | */ |
| 2403 | private function rayAngleDegrees(\Phpdftk\Css\Value\Ray $ray): ?float |
| 2404 | { |
| 2405 | $degrees = $ray->angleDegrees(); |
| 2406 | if ($degrees === null || !is_finite($degrees)) { |
| 2407 | return null; |
| 2408 | } |
| 2409 | return fmod($degrees, 360.0); |
| 2410 | } |
| 2411 | |
| 2412 | /** |
| 2413 | * The reference rectangle a ray is measured against — its containing |
| 2414 | * block, in CSS page coordinates. |
| 2415 | * |
| 2416 | * Approximated by the paint parent's content box. That is correct for |
| 2417 | * in-flow boxes; an absolutely-positioned box whose containing block is |
| 2418 | * a more distant positioned ancestor resolves against the wrong |
| 2419 | * rectangle, which matters only for percentage distances, `contain`, |
| 2420 | * and the size keywords. |
| 2421 | * |
| 2422 | * @return array{float, float, float, float} |
| 2423 | */ |
| 2424 | private function motionReferenceRect(Box $box, ?Box $parent): array |
| 2425 | { |
| 2426 | $source = $parent ?? $box; |
| 2427 | $g = $source->geometry; |
| 2428 | |
| 2429 | // CSS Motion Path 1 §2 — an omitted `<coord-box>` is `border-box`. |
| 2430 | // The SVG boxes have no meaning for an HTML containing block, so |
| 2431 | // they fall back to it too. |
| 2432 | [$left, $top, $right, $bottom] = match ($this->motionCoordBox($box) ?? 'border-box') { |
| 2433 | 'content-box' => [0.0, 0.0, 0.0, 0.0], |
| 2434 | 'padding-box' => [ |
| 2435 | $g->paddingLeft, |
| 2436 | $g->paddingTop, |
| 2437 | $g->paddingRight, |
| 2438 | $g->paddingBottom, |
| 2439 | ], |
| 2440 | 'margin-box' => [ |
| 2441 | $g->paddingLeft + $g->borderLeft + $g->marginLeft, |
| 2442 | $g->paddingTop + $g->borderTop + $g->marginTop, |
| 2443 | $g->paddingRight + $g->borderRight + $g->marginRight, |
| 2444 | $g->paddingBottom + $g->borderBottom + $g->marginBottom, |
| 2445 | ], |
| 2446 | default => [ |
| 2447 | $g->paddingLeft + $g->borderLeft, |
| 2448 | $g->paddingTop + $g->borderTop, |
| 2449 | $g->paddingRight + $g->borderRight, |
| 2450 | $g->paddingBottom + $g->borderBottom, |
| 2451 | ], |
| 2452 | }; |
| 2453 | |
| 2454 | return [ |
| 2455 | $g->x - $left, |
| 2456 | $g->y - $top, |
| 2457 | $g->width + $left + $right, |
| 2458 | $g->height + $top + $bottom, |
| 2459 | ]; |
| 2460 | } |
| 2461 | |
| 2462 | /** |
| 2463 | * The corner radii of the reference box, as a bare `<coord-box>` |
| 2464 | * offset-path inherits them. |
| 2465 | * |
| 2466 | * `border-radius` describes the BORDER box, so an inner coord box |
| 2467 | * shrinks each radius by the border and padding it sits inside |
| 2468 | * (CSS Backgrounds 3 §5.4), floored at zero. |
| 2469 | * |
| 2470 | * @return list<array{float, float}> |
| 2471 | */ |
| 2472 | private function referenceBoxRadii(Box $source, string $coordBox): array |
| 2473 | { |
| 2474 | $g = $source->geometry; |
| 2475 | $inset = match ($coordBox) { |
| 2476 | 'content-box' => [ |
| 2477 | $g->borderLeft + $g->paddingLeft, |
| 2478 | $g->borderTop + $g->paddingTop, |
| 2479 | $g->borderRight + $g->paddingRight, |
| 2480 | $g->borderBottom + $g->paddingBottom, |
| 2481 | ], |
| 2482 | 'padding-box' => [$g->borderLeft, $g->borderTop, $g->borderRight, $g->borderBottom], |
| 2483 | default => [0.0, 0.0, 0.0, 0.0], |
| 2484 | }; |
| 2485 | [$left, $top, $right, $bottom] = $inset; |
| 2486 | |
| 2487 | // Percentage radii always resolve against the BORDER box, whichever |
| 2488 | // coord box the path itself uses. |
| 2489 | [$borderWidth, $borderHeight] = $this->borderBoxExtent($source); |
| 2490 | $radii = $this->borderRadiiXY($source, $borderWidth, $borderHeight); |
| 2491 | return [ |
| 2492 | [max(0.0, $radii[0][0] - $left), max(0.0, $radii[0][1] - $top)], |
| 2493 | [max(0.0, $radii[1][0] - $right), max(0.0, $radii[1][1] - $top)], |
| 2494 | [max(0.0, $radii[2][0] - $right), max(0.0, $radii[2][1] - $bottom)], |
| 2495 | [max(0.0, $radii[3][0] - $left), max(0.0, $radii[3][1] - $bottom)], |
| 2496 | ]; |
| 2497 | } |
| 2498 | |
| 2499 | /** |
| 2500 | * The `<coord-box>` named by this box's `offset-path`, if any. |
| 2501 | * |
| 2502 | * A `<coord-box>` may stand alone as the whole offset-path |
| 2503 | * (`offset-path: padding-box`), in which case it is both the reference |
| 2504 | * box and the path itself. |
| 2505 | */ |
| 2506 | private function motionCoordBox(Box $box): ?string |
| 2507 | { |
| 2508 | $value = $box->style->get('offset-path'); |
| 2509 | $components = $value instanceof \Phpdftk\Css\Value\ValueList |
| 2510 | ? $value->values |
| 2511 | : ($value !== null ? [$value] : []); |
| 2512 | foreach ($components as $component) { |
| 2513 | if (!($component instanceof Keyword)) { |
| 2514 | continue; |
| 2515 | } |
| 2516 | $name = strtolower($component->name); |
| 2517 | if (in_array($name, [ |
| 2518 | 'content-box', |
| 2519 | 'padding-box', |
| 2520 | 'border-box', |
| 2521 | 'margin-box', |
| 2522 | 'fill-box', |
| 2523 | 'stroke-box', |
| 2524 | 'view-box', |
| 2525 | ], true)) { |
| 2526 | return $name; |
| 2527 | } |
| 2528 | } |
| 2529 | return null; |
| 2530 | } |
| 2531 | |
| 2532 | /** |
| 2533 | * Where the ray starts, in CSS page coordinates. |
| 2534 | * |
| 2535 | * `ray(... at <position>)` wins. Otherwise `offset-position: auto` |
| 2536 | * starts at the box's own border-box top-left, an explicit |
| 2537 | * `offset-position` resolves in the containing block, and `normal` |
| 2538 | * (the initial value) falls back to the containing block's centre. |
| 2539 | * |
| 2540 | * @return array{float, float} |
| 2541 | */ |
| 2542 | private function rayOrigin( |
| 2543 | Box $box, |
| 2544 | \Phpdftk\Css\Value\Ray $ray, |
| 2545 | float $cbX, |
| 2546 | float $cbY, |
| 2547 | float $cbW, |
| 2548 | float $cbH, |
| 2549 | ): array { |
| 2550 | if ($ray->atX !== null && $ray->atY !== null) { |
| 2551 | return [ |
| 2552 | $cbX + $this->resolvePositionComponent($ray->atX, $cbW, true), |
| 2553 | $cbY + $this->resolvePositionComponent($ray->atY, $cbH, false), |
| 2554 | ]; |
| 2555 | } |
| 2556 | $position = $box->style->get('offset-position'); |
| 2557 | if ($position instanceof Keyword && strtolower($position->name) === 'auto') { |
| 2558 | $g = $box->geometry; |
| 2559 | return [ |
| 2560 | $g->x - $g->paddingLeft - $g->borderLeft, |
| 2561 | $g->y - $g->paddingTop - $g->borderTop, |
| 2562 | ]; |
| 2563 | } |
| 2564 | if ($position instanceof \Phpdftk\Css\Value\ValueList |
| 2565 | && count($position->values) >= 2 |
| 2566 | ) { |
| 2567 | return [ |
| 2568 | $cbX + $this->resolvePositionComponent($position->values[0], $cbW, true), |
| 2569 | $cbY + $this->resolvePositionComponent($position->values[1], $cbH, false), |
| 2570 | ]; |
| 2571 | } |
| 2572 | return [$cbX + $cbW / 2.0, $cbY + $cbH / 2.0]; |
| 2573 | } |
| 2574 | |
| 2575 | /** |
| 2576 | * CSS Motion Path 1 §2.2 — the ray's length. |
| 2577 | * |
| 2578 | * Only `sides` follows the angle, stopping where the ray leaves the |
| 2579 | * containing block. The other four ignore the angle entirely and |
| 2580 | * measure to a side or a corner. |
| 2581 | */ |
| 2582 | private function rayLength( |
| 2583 | Box $box, |
| 2584 | \Phpdftk\Css\Value\Ray $ray, |
| 2585 | float $degrees, |
| 2586 | float $sx, |
| 2587 | float $sy, |
| 2588 | float $cbX, |
| 2589 | float $cbY, |
| 2590 | float $cbW, |
| 2591 | float $cbH, |
| 2592 | ): float { |
| 2593 | $left = $cbX; |
| 2594 | $right = $cbX + $cbW; |
| 2595 | $top = $cbY; |
| 2596 | $bottom = $cbY + $cbH; |
| 2597 | $sides = [abs($sx - $left), abs($right - $sx), abs($sy - $top), abs($bottom - $sy)]; |
| 2598 | $corners = []; |
| 2599 | foreach ([$left, $right] as $cx) { |
| 2600 | foreach ([$top, $bottom] as $cy) { |
| 2601 | $corners[] = hypot($sx - $cx, $sy - $cy); |
| 2602 | } |
| 2603 | } |
| 2604 | |
| 2605 | $length = match ($ray->size) { |
| 2606 | \Phpdftk\Css\Value\RaySize::ClosestSide => min($sides), |
| 2607 | \Phpdftk\Css\Value\RaySize::FarthestSide => max($sides), |
| 2608 | \Phpdftk\Css\Value\RaySize::ClosestCorner => min($corners), |
| 2609 | \Phpdftk\Css\Value\RaySize::FarthestCorner => max($corners), |
| 2610 | \Phpdftk\Css\Value\RaySize::Sides => $this->raySidesLength( |
| 2611 | $degrees, |
| 2612 | $sx, |
| 2613 | $sy, |
| 2614 | $left, |
| 2615 | $top, |
| 2616 | $right, |
| 2617 | $bottom, |
| 2618 | ), |
| 2619 | }; |
| 2620 | |
| 2621 | // CSS Motion Path 1 §2.2 — `contain` shortens the ray so the |
| 2622 | // element still fits inside its containing block. The reduction is |
| 2623 | // half the box's LARGER side and does not depend on the ray's |
| 2624 | // direction, so a wide box is held back as far when travelling |
| 2625 | // vertically as horizontally. |
| 2626 | if ($ray->contain) { |
| 2627 | [$width, $height] = $this->borderBoxExtent($box); |
| 2628 | $length = max(0.0, $length - max($width, $height) / 2.0); |
| 2629 | } |
| 2630 | return $length; |
| 2631 | } |
| 2632 | |
| 2633 | /** |
| 2634 | * The box's border-box width and height. |
| 2635 | * |
| 2636 | * @return array{float, float} |
| 2637 | */ |
| 2638 | private function borderBoxExtent(Box $box): array |
| 2639 | { |
| 2640 | $g = $box->geometry; |
| 2641 | return [ |
| 2642 | $g->width + $g->paddingLeft + $g->paddingRight + $g->borderLeft + $g->borderRight, |
| 2643 | $g->height + $g->paddingTop + $g->paddingBottom + $g->borderTop + $g->borderBottom, |
| 2644 | ]; |
| 2645 | } |
| 2646 | |
| 2647 | /** |
| 2648 | * `sides`: the distance from the origin to where the ray crosses the |
| 2649 | * containing block's boundary. An origin outside the box gives zero — |
| 2650 | * the ray must not reach back in. |
| 2651 | */ |
| 2652 | private function raySidesLength( |
| 2653 | float $degrees, |
| 2654 | float $sx, |
| 2655 | float $sy, |
| 2656 | float $left, |
| 2657 | float $top, |
| 2658 | float $right, |
| 2659 | float $bottom, |
| 2660 | ): float { |
| 2661 | if ($sx < $left || $sx > $right || $sy < $top || $sy > $bottom) { |
| 2662 | return 0.0; |
| 2663 | } |
| 2664 | $theta = deg2rad($degrees); |
| 2665 | $ux = sin($theta); |
| 2666 | $uy = -cos($theta); |
| 2667 | $best = null; |
| 2668 | // Distance to each of the four edge lines, keeping the nearest |
| 2669 | // one the ray actually travels toward. |
| 2670 | foreach ([[$ux, $left - $sx], [$ux, $right - $sx]] as [$component, $delta]) { |
| 2671 | if (abs($component) > 1e-9) { |
| 2672 | $t = $delta / $component; |
| 2673 | if ($t >= 0.0) { |
| 2674 | $best = $best === null ? $t : min($best, $t); |
| 2675 | } |
| 2676 | } |
| 2677 | } |
| 2678 | foreach ([[$uy, $top - $sy], [$uy, $bottom - $sy]] as [$component, $delta]) { |
| 2679 | if (abs($component) > 1e-9) { |
| 2680 | $t = $delta / $component; |
| 2681 | if ($t >= 0.0) { |
| 2682 | $best = $best === null ? $t : min($best, $t); |
| 2683 | } |
| 2684 | } |
| 2685 | } |
| 2686 | return $best ?? 0.0; |
| 2687 | } |
| 2688 | |
| 2689 | /** |
| 2690 | * `offset-distance`. A percentage is of the path's length; absolute |
| 2691 | * lengths are NOT clamped to the path (only a `contain` ray shortens). |
| 2692 | */ |
| 2693 | private function resolveMotionDistance(Box $box, float $length): float |
| 2694 | { |
| 2695 | $value = $box->style->get('offset-distance'); |
| 2696 | if ($value instanceof \Phpdftk\Css\Value\Percentage) { |
| 2697 | return $length * $value->value / 100.0; |
| 2698 | } |
| 2699 | if ($value instanceof \Phpdftk\Css\Value\Length) { |
| 2700 | return $value->value; |
| 2701 | } |
| 2702 | // `calc(12.5% + 200px)` mixes both, so percentages resolve against |
| 2703 | // the path length rather than being dropped. |
| 2704 | if ($value instanceof \Phpdftk\Css\Value\Calc) { |
| 2705 | $resolved = \Phpdftk\Css\Cascade\CalcEvaluator::evaluate( |
| 2706 | $value, |
| 2707 | new \Phpdftk\Css\Cascade\LengthContext(percentageBasis: $length), |
| 2708 | ); |
| 2709 | return is_finite($resolved) ? $resolved : 0.0; |
| 2710 | } |
| 2711 | return 0.0; |
| 2712 | } |
| 2713 | |
| 2714 | /** |
| 2715 | * `offset-rotate` — initial value `auto`, which follows the path |
| 2716 | * tangent. `reverse` faces the other way; a bare angle ignores the |
| 2717 | * tangent; `auto <angle>` / `reverse <angle>` add to it. |
| 2718 | */ |
| 2719 | private function resolveMotionRotation(Box $box, float $tangent): float |
| 2720 | { |
| 2721 | $value = $box->style->get('offset-rotate'); |
| 2722 | $components = $value instanceof \Phpdftk\Css\Value\ValueList |
| 2723 | ? $value->values |
| 2724 | : ($value !== null ? [$value] : []); |
| 2725 | |
| 2726 | $base = $tangent; |
| 2727 | $extra = 0.0; |
| 2728 | $sawKeyword = false; |
| 2729 | foreach ($components as $component) { |
| 2730 | if ($component instanceof Keyword) { |
| 2731 | $name = strtolower($component->name); |
| 2732 | if ($name === 'auto') { |
| 2733 | $base = $tangent; |
| 2734 | $sawKeyword = true; |
| 2735 | } elseif ($name === 'reverse') { |
| 2736 | $base = $tangent + 180.0; |
| 2737 | $sawKeyword = true; |
| 2738 | } |
| 2739 | continue; |
| 2740 | } |
| 2741 | if ($component instanceof \Phpdftk\Css\Value\Angle) { |
| 2742 | $extra = $component->toDegrees(); |
| 2743 | } |
| 2744 | } |
| 2745 | // A bare `<angle>` replaces the tangent rather than adding to it. |
| 2746 | if (!$sawKeyword && $components !== []) { |
| 2747 | $hasAngle = false; |
| 2748 | foreach ($components as $component) { |
| 2749 | if ($component instanceof \Phpdftk\Css\Value\Angle) { |
| 2750 | $hasAngle = true; |
| 2751 | break; |
| 2752 | } |
| 2753 | } |
| 2754 | if ($hasAngle) { |
| 2755 | return $extra; |
| 2756 | } |
| 2757 | } |
| 2758 | return $base + $extra; |
| 2759 | } |
| 2760 | |
| 2761 | /** |
| 2762 | * `transform-origin` in CSS page coordinates (Y down), as the motion |
| 2763 | * math needs it. {@see resolveTransformOrigin} returns the same point |
| 2764 | * already flipped into PDF space. |
| 2765 | * |
| 2766 | * @return array{float, float} |
| 2767 | */ |
| 2768 | private function transformOriginCss(Box $box): array |
| 2769 | { |
| 2770 | $g = $box->geometry; |
| 2771 | $width = $g->width + $g->paddingLeft + $g->paddingRight + $g->borderLeft + $g->borderRight; |
| 2772 | $height = $g->height + $g->paddingTop + $g->paddingBottom + $g->borderTop + $g->borderBottom; |
| 2773 | $boxX = $g->x - $g->paddingLeft - $g->borderLeft; |
| 2774 | $boxY = $g->y - $g->paddingTop - $g->borderTop; |
| 2775 | $value = $box->style->get('transform-origin'); |
| 2776 | $values = $value instanceof \Phpdftk\Css\Value\ValueList |
| 2777 | ? $value->values |
| 2778 | : ($value !== null ? [$value] : []); |
| 2779 | [$offX, $offY] = $this->resolveTransformOriginOffsets($values, $width, $height); |
| 2780 | return [$boxX + $offX, $boxY + $offY]; |
| 2781 | } |
| 2782 | |
| 2783 | /** |
| 2784 | * `offset-anchor` in CSS page coordinates. `auto` — the initial value |
| 2785 | * — means the computed `transform-origin`, NOT `offset-position`. |
| 2786 | * |
| 2787 | * @return array{float, float} |
| 2788 | */ |
| 2789 | private function motionAnchorCss(Box $box, float $originX, float $originY): array |
| 2790 | { |
| 2791 | $value = $box->style->get('offset-anchor'); |
| 2792 | if (!($value instanceof \Phpdftk\Css\Value\ValueList) || count($value->values) < 2) { |
| 2793 | return [$originX, $originY]; |
| 2794 | } |
| 2795 | $g = $box->geometry; |
| 2796 | $width = $g->width + $g->paddingLeft + $g->paddingRight + $g->borderLeft + $g->borderRight; |
| 2797 | $height = $g->height + $g->paddingTop + $g->paddingBottom + $g->borderTop + $g->borderBottom; |
| 2798 | $boxX = $g->x - $g->paddingLeft - $g->borderLeft; |
| 2799 | $boxY = $g->y - $g->paddingTop - $g->borderTop; |
| 2800 | return [ |
| 2801 | $boxX + $this->resolvePositionComponent($value->values[0], $width, true), |
| 2802 | $boxY + $this->resolvePositionComponent($value->values[1], $height, false), |
| 2803 | ]; |
| 2804 | } |
| 2805 | |
| 2806 | /** |
| 2807 | * One `<position>` component against an extent. `$horizontal` selects |
| 2808 | * which edge keywords apply. |
| 2809 | */ |
| 2810 | private function resolvePositionComponent( |
| 2811 | \Phpdftk\Css\Value\Value $value, |
| 2812 | float $extent, |
| 2813 | bool $horizontal, |
| 2814 | ): float { |
| 2815 | if ($value instanceof \Phpdftk\Css\Value\Length) { |
| 2816 | return $value->value; |
| 2817 | } |
| 2818 | if ($value instanceof \Phpdftk\Css\Value\Percentage) { |
| 2819 | return $extent * $value->value / 100.0; |
| 2820 | } |
| 2821 | if ($value instanceof Keyword) { |
| 2822 | return match (strtolower($value->name)) { |
| 2823 | 'left', 'top' => 0.0, |
| 2824 | 'right', 'bottom' => $extent, |
| 2825 | default => $extent / 2.0, |
| 2826 | }; |
| 2827 | } |
| 2828 | // The three/four-value `<position>` form folds an offset from a far |
| 2829 | // edge into `calc(100% - <length>)`. |
| 2830 | if ($value instanceof \Phpdftk\Css\Value\Calc) { |
| 2831 | $resolved = \Phpdftk\Css\Cascade\CalcEvaluator::evaluate( |
| 2832 | $value, |
| 2833 | new \Phpdftk\Css\Cascade\LengthContext(percentageBasis: $extent), |
| 2834 | ); |
| 2835 | return is_finite($resolved) ? $resolved : 0.0; |
| 2836 | } |
| 2837 | return 0.0; |
| 2838 | } |
| 2839 | |
| 2840 | /** |
| 2841 | * Compose the box's transform-function list into a single 2D |
| 2842 | * matrix [a, b, c, d, e, f] in PDF coordinate space (Y-up). |
| 2843 | * Returns `null` if no function produced output (3D-only |
| 2844 | * transforms flatten to identity at Phase 2). |
| 2845 | * |
| 2846 | * @return ?array{0: float, 1: float, 2: float, 3: float, 4: float, 5: float} |
| 2847 | */ |
| 2848 | private function composeTransformMatrix(\Phpdftk\Css\Value\Transform $transform, Box $box): ?array |
| 2849 | { |
| 2850 | $result = [1.0, 0.0, 0.0, 1.0, 0.0, 0.0]; // identity |
| 2851 | $any = false; |
| 2852 | foreach ($transform->functions as $fn) { |
| 2853 | $m = $this->transformFunctionToPdfMatrix($fn, $box); |
| 2854 | if ($m === null) { |
| 2855 | continue; |
| 2856 | } |
| 2857 | $result = $this->multiplyMatrices($result, $m); |
| 2858 | $any = true; |
| 2859 | } |
| 2860 | return $any ? $result : null; |
| 2861 | } |
| 2862 | |
| 2863 | /** |
| 2864 | * CSS Transforms 2 §5 — the transform functions contributed by the |
| 2865 | * individual `translate` / `rotate` / `scale` properties, in that |
| 2866 | * order (they compose before the `transform` list). Each reads its |
| 2867 | * computed value directly; `none` / absent / malformed → skipped. |
| 2868 | * |
| 2869 | * @return list<\Phpdftk\Css\Value\TransformFunction> |
| 2870 | */ |
| 2871 | private function individualTransformFunctions(Box $box): array |
| 2872 | { |
| 2873 | $out = []; |
| 2874 | $t = $this->individualTranslate($box->style->get('translate')); |
| 2875 | if ($t !== null) { |
| 2876 | $out[] = $t; |
| 2877 | } |
| 2878 | $r = $this->individualRotate($box->style->get('rotate')); |
| 2879 | if ($r !== null) { |
| 2880 | $out[] = $r; |
| 2881 | } |
| 2882 | $s = $this->individualScale($box->style->get('scale')); |
| 2883 | if ($s !== null) { |
| 2884 | $out[] = $s; |
| 2885 | } |
| 2886 | return $out; |
| 2887 | } |
| 2888 | |
| 2889 | /** |
| 2890 | * Unwrap a transform property's computed value into its component |
| 2891 | * list. `none` / null → null (skip); a space-separated ValueList → |
| 2892 | * its values; a single value → a one-element list. |
| 2893 | * |
| 2894 | * @return list<\Phpdftk\Css\Value\Value>|null |
| 2895 | */ |
| 2896 | private function transformPropertyComponents(?\Phpdftk\Css\Value\Value $value): ?array |
| 2897 | { |
| 2898 | if ($value === null) { |
| 2899 | return null; |
| 2900 | } |
| 2901 | if ($value instanceof Keyword && strtolower($value->name) === 'none') { |
| 2902 | return null; |
| 2903 | } |
| 2904 | if ($value instanceof \Phpdftk\Css\Value\ValueList) { |
| 2905 | return $value->values; |
| 2906 | } |
| 2907 | return [$value]; |
| 2908 | } |
| 2909 | |
| 2910 | private function individualTranslate(?\Phpdftk\Css\Value\Value $value): ?\Phpdftk\Css\Value\TranslateTransform |
| 2911 | { |
| 2912 | $c = $this->transformPropertyComponents($value); |
| 2913 | if ($c === null || $c === []) { |
| 2914 | return null; |
| 2915 | } |
| 2916 | $x = $c[0]; |
| 2917 | if (!($x instanceof \Phpdftk\Css\Value\Length || $x instanceof \Phpdftk\Css\Value\Percentage)) { |
| 2918 | return null; |
| 2919 | } |
| 2920 | $y = $c[1] ?? new \Phpdftk\Css\Value\Length(0.0, \Phpdftk\Css\Value\LengthUnit::Px); |
| 2921 | if (!($y instanceof \Phpdftk\Css\Value\Length || $y instanceof \Phpdftk\Css\Value\Percentage)) { |
| 2922 | return null; |
| 2923 | } |
| 2924 | $z = ($c[2] ?? null) instanceof \Phpdftk\Css\Value\Length ? $c[2] : null; |
| 2925 | return new \Phpdftk\Css\Value\TranslateTransform($x, $y, $z); |
| 2926 | } |
| 2927 | |
| 2928 | private function individualScale(?\Phpdftk\Css\Value\Value $value): ?\Phpdftk\Css\Value\ScaleTransform |
| 2929 | { |
| 2930 | $c = $this->transformPropertyComponents($value); |
| 2931 | if ($c === null || $c === []) { |
| 2932 | return null; |
| 2933 | } |
| 2934 | $sx = $this->transformNumber($c[0]); |
| 2935 | if ($sx === null) { |
| 2936 | return null; |
| 2937 | } |
| 2938 | $sy = isset($c[1]) ? $this->transformNumber($c[1]) : $sx; |
| 2939 | if ($sy === null) { |
| 2940 | return null; |
| 2941 | } |
| 2942 | $sz = isset($c[2]) ? $this->transformNumber($c[2]) : null; |
| 2943 | return new \Phpdftk\Css\Value\ScaleTransform($sx, $sy, $sz); |
| 2944 | } |
| 2945 | |
| 2946 | private function individualRotate(?\Phpdftk\Css\Value\Value $value): ?\Phpdftk\Css\Value\RotateTransform |
| 2947 | { |
| 2948 | $c = $this->transformPropertyComponents($value); |
| 2949 | if ($c === null || $c === []) { |
| 2950 | return null; |
| 2951 | } |
| 2952 | $ax = 0.0; |
| 2953 | $ay = 0.0; |
| 2954 | $az = 1.0; |
| 2955 | $angle = null; |
| 2956 | if (count($c) === 1) { |
| 2957 | // `rotate: <angle>` → 2D rotation about Z. |
| 2958 | $angle = $c[0]; |
| 2959 | } elseif (count($c) === 2 && $c[0] instanceof Keyword) { |
| 2960 | // `rotate: [x|y|z] <angle>`. |
| 2961 | switch (strtolower($c[0]->name)) { |
| 2962 | case 'x': $ax = 1.0; |
| 2963 | $ay = 0.0; |
| 2964 | $az = 0.0; |
| 2965 | break; |
| 2966 | case 'y': $ax = 0.0; |
| 2967 | $ay = 1.0; |
| 2968 | $az = 0.0; |
| 2969 | break; |
| 2970 | case 'z': $ax = 0.0; |
| 2971 | $ay = 0.0; |
| 2972 | $az = 1.0; |
| 2973 | break; |
| 2974 | default: return null; |
| 2975 | } |
| 2976 | $angle = $c[1]; |
| 2977 | } elseif (count($c) === 4) { |
| 2978 | // `rotate: <number>{3} <angle>` (axis vector + angle). |
| 2979 | $ax = $this->transformNumber($c[0]); |
| 2980 | $ay = $this->transformNumber($c[1]); |
| 2981 | $az = $this->transformNumber($c[2]); |
| 2982 | if ($ax === null || $ay === null || $az === null) { |
| 2983 | return null; |
| 2984 | } |
| 2985 | $angle = $c[3]; |
| 2986 | } else { |
| 2987 | return null; |
| 2988 | } |
| 2989 | if (!$angle instanceof \Phpdftk\Css\Value\Angle) { |
| 2990 | return null; |
| 2991 | } |
| 2992 | return new \Phpdftk\Css\Value\RotateTransform($angle->toDegrees(), $ax, $ay, $az); |
| 2993 | } |
| 2994 | |
| 2995 | private function transformNumber(\Phpdftk\Css\Value\Value $value): ?float |
| 2996 | { |
| 2997 | if ($value instanceof \Phpdftk\Css\Value\Number) { |
| 2998 | return $value->value; |
| 2999 | } |
| 3000 | if ($value instanceof \Phpdftk\Css\Value\Integer) { |
| 3001 | return (float) $value->value; |
| 3002 | } |
| 3003 | return null; |
| 3004 | } |
| 3005 | |
| 3006 | /** |
| 3007 | * Convert a single CSS transform-function to a 2D PDF matrix |
| 3008 | * (Y-up). The conversion negates the (b, c, f) entries — that's |
| 3009 | * the matrix-form of conjugating by a Y-axis flip, which maps |
| 3010 | * CSS's Y-down coords to PDF's Y-up. |
| 3011 | * |
| 3012 | * @return ?array{0: float, 1: float, 2: float, 3: float, 4: float, 5: float} |
| 3013 | */ |
| 3014 | private function transformFunctionToPdfMatrix( |
| 3015 | \Phpdftk\Css\Value\TransformFunction $fn, |
| 3016 | Box $box, |
| 3017 | ): ?array { |
| 3018 | if ($fn instanceof \Phpdftk\Css\Value\TranslateTransform) { |
| 3019 | $tx = $this->lengthOrPercentageToFloat($fn->x, $box->geometry->width); |
| 3020 | $ty = $this->lengthOrPercentageToFloat($fn->y, $box->geometry->height); |
| 3021 | return [1.0, 0.0, 0.0, 1.0, $tx, -$ty]; |
| 3022 | } |
| 3023 | if ($fn instanceof \Phpdftk\Css\Value\RotateTransform) { |
| 3024 | // CSS Transforms 2 §13 — rotateX / rotateY collapse onto |
| 3025 | // a 2D plane in print. Approximation: rotateX(θ) scales |
| 3026 | // the box vertically by |cos(θ)| (mirroring past 90°), |
| 3027 | // rotateY(θ) scales horizontally. Visually correct at |
| 3028 | // canonical angles (0° = unchanged, 90° = edge-on, |
| 3029 | // 180° = mirrored). Z rotation keeps the 2D rotation |
| 3030 | // matrix. |
| 3031 | $rad = deg2rad($fn->angleDeg); |
| 3032 | $cos = cos($rad); |
| 3033 | $sin = sin($rad); |
| 3034 | $axisLen = sqrt($fn->ax * $fn->ax + $fn->ay * $fn->ay + $fn->az * $fn->az); |
| 3035 | if ($axisLen <= 0.0) { |
| 3036 | return null; |
| 3037 | } |
| 3038 | $nx = $fn->ax / $axisLen; |
| 3039 | $ny = $fn->ay / $axisLen; |
| 3040 | $nz = $fn->az / $axisLen; |
| 3041 | // Decompose rotate3d into axis projections. For an axis |
| 3042 | // that's purely Z (nx=ny=0, nz=±1), keep the planar |
| 3043 | // rotation; for X/Y components, flatten via cos-scaling. |
| 3044 | if (abs($nz) > 0.9999) { |
| 3045 | // Z rotation (or close to it). |
| 3046 | $sign = $nz > 0 ? 1.0 : -1.0; |
| 3047 | return [$cos, -$sign * $sin, $sign * $sin, $cos, 0.0, 0.0]; |
| 3048 | } |
| 3049 | // X / Y rotation (or a tilt): use cos-flatten. For mixed |
| 3050 | // axes, weight by the axis components. Pure rotateX |
| 3051 | // (nx=1) → sy = cos, sx = 1. Pure rotateY (ny=1) → sx |
| 3052 | // = cos, sy = 1. |
| 3053 | $sy = 1.0 - abs($nx) + abs($nx) * $cos; |
| 3054 | $sx = 1.0 - abs($ny) + abs($ny) * $cos; |
| 3055 | return [$sx, 0.0, 0.0, $sy, 0.0, 0.0]; |
| 3056 | } |
| 3057 | if ($fn instanceof \Phpdftk\Css\Value\ScaleTransform) { |
| 3058 | return [$fn->sx, 0.0, 0.0, $fn->sy, 0.0, 0.0]; |
| 3059 | } |
| 3060 | if ($fn instanceof \Phpdftk\Css\Value\SkewTransform) { |
| 3061 | $tanX = tan(deg2rad($fn->xDeg)); |
| 3062 | $tanY = tan(deg2rad($fn->yDeg)); |
| 3063 | // CSS skewX: [1, 0, tan(x), 1]; PDF flips b+c → [1, 0, -tan(x), 1] |
| 3064 | // CSS skewY: [1, tan(y), 0, 1]; PDF flips → [1, -tan(y), 0, 1] |
| 3065 | return [1.0, -$tanY, -$tanX, 1.0, 0.0, 0.0]; |
| 3066 | } |
| 3067 | if ($fn instanceof \Phpdftk\Css\Value\MatrixTransform) { |
| 3068 | return [$fn->a, -$fn->b, -$fn->c, $fn->d, $fn->e, -$fn->f]; |
| 3069 | } |
| 3070 | return null; |
| 3071 | } |
| 3072 | |
| 3073 | /** |
| 3074 | * Multiply two 2D affine matrices in [a, b, c, d, e, f] form: |
| 3075 | * M = [a c e] M' = [a' c' e'] M × M' = [...] |
| 3076 | * [b d f] [b' d' f'] |
| 3077 | * [0 0 1] [0 0 1] |
| 3078 | * |
| 3079 | * @param array{0: float, 1: float, 2: float, 3: float, 4: float, 5: float} $m1 |
| 3080 | * @param array{0: float, 1: float, 2: float, 3: float, 4: float, 5: float} $m2 |
| 3081 | * @return array{0: float, 1: float, 2: float, 3: float, 4: float, 5: float} |
| 3082 | */ |
| 3083 | private function multiplyMatrices(array $m1, array $m2): array |
| 3084 | { |
| 3085 | [$a1, $b1, $c1, $d1, $e1, $f1] = $m1; |
| 3086 | [$a2, $b2, $c2, $d2, $e2, $f2] = $m2; |
| 3087 | return [ |
| 3088 | $a1 * $a2 + $c1 * $b2, |
| 3089 | $b1 * $a2 + $d1 * $b2, |
| 3090 | $a1 * $c2 + $c1 * $d2, |
| 3091 | $b1 * $c2 + $d1 * $d2, |
| 3092 | $a1 * $e2 + $c1 * $f2 + $e1, |
| 3093 | $b1 * $e2 + $d1 * $f2 + $f1, |
| 3094 | ]; |
| 3095 | } |
| 3096 | |
| 3097 | /** |
| 3098 | * Resolve `transform-origin` to a PDF coordinate point. Default |
| 3099 | * `50% 50%` puts the pivot at the box's centre. Lengths and |
| 3100 | * percentages compose; percentages resolve against the box's |
| 3101 | * border-box dimension on each axis. |
| 3102 | * |
| 3103 | * @return array{0: float, 1: float} (px, py) in PDF coords. |
| 3104 | */ |
| 3105 | private function resolveTransformOrigin(Box $box): array |
| 3106 | { |
| 3107 | $g = $box->geometry; |
| 3108 | $width = $g->width + $g->paddingLeft + $g->paddingRight + $g->borderLeft + $g->borderRight; |
| 3109 | $height = $g->height + $g->paddingTop + $g->paddingBottom + $g->borderTop + $g->borderBottom; |
| 3110 | $boxX = $g->x - $g->paddingLeft - $g->borderLeft; |
| 3111 | $boxY = $g->y - $g->paddingTop - $g->borderTop; |
| 3112 | |
| 3113 | $value = $box->style->get('transform-origin'); |
| 3114 | $values = $value instanceof \Phpdftk\Css\Value\ValueList |
| 3115 | ? $value->values |
| 3116 | : ($value !== null ? [$value] : []); |
| 3117 | [$offX, $offY] = $this->resolveTransformOriginOffsets($values, $width, $height); |
| 3118 | $cssY = $boxY + $offY; |
| 3119 | return [$boxX + $offX, $this->pageHeight - $cssY]; |
| 3120 | } |
| 3121 | |
| 3122 | /** |
| 3123 | * Resolve `transform-origin`'s 1-3 components to (x, y) offsets. Position |
| 3124 | * keywords bind by AXIS IDENTITY, not order (CSS Transforms 1 §6 / the |
| 3125 | * <position> grammar): `left`/`right` set X, `top`/`bottom` set Y in any |
| 3126 | * order; `center`, `<length>` and `<percentage>` fill the remaining axes |
| 3127 | * positionally (X first). A single keyword leaves the other axis at center. |
| 3128 | * |
| 3129 | * @param list<\Phpdftk\Css\Value\Value> $values |
| 3130 | * @return array{float, float} |
| 3131 | */ |
| 3132 | private function resolveTransformOriginOffsets(array $values, float $width, float $height): array |
| 3133 | { |
| 3134 | $offX = null; |
| 3135 | $offY = null; |
| 3136 | $positional = []; |
| 3137 | foreach ($values as $v) { |
| 3138 | if ($v instanceof \Phpdftk\Css\Value\Keyword) { |
| 3139 | switch (strtolower($v->name)) { |
| 3140 | case 'left': $offX = 0.0; |
| 3141 | continue 2; |
| 3142 | case 'right': $offX = $width; |
| 3143 | continue 2; |
| 3144 | case 'top': $offY = 0.0; |
| 3145 | continue 2; |
| 3146 | case 'bottom': $offY = $height; |
| 3147 | continue 2; |
| 3148 | // 'center' falls through to positional assignment. |
| 3149 | } |
| 3150 | } |
| 3151 | $positional[] = $v; |
| 3152 | } |
| 3153 | foreach ($positional as $v) { |
| 3154 | if ($offX === null) { |
| 3155 | $offX = $this->resolveOriginComponent($v, $width, $width / 2.0); |
| 3156 | } elseif ($offY === null) { |
| 3157 | $offY = $this->resolveOriginComponent($v, $height, $height / 2.0); |
| 3158 | } |
| 3159 | } |
| 3160 | return [$offX ?? $width / 2.0, $offY ?? $height / 2.0]; |
| 3161 | } |
| 3162 | |
| 3163 | private function resolveOriginComponent( |
| 3164 | \Phpdftk\Css\Value\Value $value, |
| 3165 | float $extent, |
| 3166 | float $fallback, |
| 3167 | ): float { |
| 3168 | if ($value instanceof \Phpdftk\Css\Value\Length) { |
| 3169 | return $value->value; |
| 3170 | } |
| 3171 | if ($value instanceof \Phpdftk\Css\Value\Percentage) { |
| 3172 | return $value->value / 100.0 * $extent; |
| 3173 | } |
| 3174 | // CSS Values 4 §5.2 — a unitless `0` is equivalent to `0px` in |
| 3175 | // any length context. The generic stylesheet parser stores it as |
| 3176 | // `Integer` / `Number`, which the cascade keeps unchanged for |
| 3177 | // properties (like `transform-origin`) that don't have a |
| 3178 | // dedicated typed parser. Treat both shapes as a px length so |
| 3179 | // `transform-origin: 0 0` doesn't silently fall back to the 50% |
| 3180 | // default. |
| 3181 | if ($value instanceof \Phpdftk\Css\Value\Integer |
| 3182 | || $value instanceof \Phpdftk\Css\Value\Number |
| 3183 | ) { |
| 3184 | return (float) $value->value; |
| 3185 | } |
| 3186 | if ($value instanceof \Phpdftk\Css\Value\Keyword) { |
| 3187 | return match (strtolower($value->name)) { |
| 3188 | 'left', 'top' => 0.0, |
| 3189 | 'right', 'bottom' => $extent, |
| 3190 | 'center' => $extent / 2.0, |
| 3191 | default => $fallback, |
| 3192 | }; |
| 3193 | } |
| 3194 | return $fallback; |
| 3195 | } |
| 3196 | |
| 3197 | private function lengthOrPercentageToFloat( |
| 3198 | \Phpdftk\Css\Value\Length|\Phpdftk\Css\Value\Percentage $value, |
| 3199 | float $basis, |
| 3200 | ): float { |
| 3201 | if ($value instanceof \Phpdftk\Css\Value\Length) { |
| 3202 | return $value->value; |
| 3203 | } |
| 3204 | return $value->value / 100.0 * $basis; |
| 3205 | } |
| 3206 | |
| 3207 | /** |
| 3208 | * `true` when this box (a) declares `box-decoration-break: clone` |
| 3209 | * AND (b) actually straddles the current page boundary. Boxes that |
| 3210 | * fit entirely on one page don't need the clamp — slice and clone |
| 3211 | * paint identically in that case. |
| 3212 | */ |
| 3213 | private function shouldClampDecorationsToPage(Box $box): bool |
| 3214 | { |
| 3215 | if ($this->pageRangeStart === null || $this->pageRangeEnd === null) { |
| 3216 | return false; |
| 3217 | } |
| 3218 | if (!$this->isCloneDecorationBreak($box)) { |
| 3219 | return false; |
| 3220 | } |
| 3221 | $g = $box->geometry; |
| 3222 | $outerTop = $g->y - $g->paddingTop - $g->borderTop - $g->marginTop; |
| 3223 | $outerBottom = $g->y + $g->height + $g->paddingBottom + $g->borderBottom + $g->marginBottom; |
| 3224 | return $outerTop < $this->pageRangeStart || $outerBottom > $this->pageRangeEnd; |
| 3225 | } |
| 3226 | |
| 3227 | private function isCloneDecorationBreak(Box $box): bool |
| 3228 | { |
| 3229 | $value = $box->style->get('box-decoration-break'); |
| 3230 | if (!($value instanceof Keyword)) { |
| 3231 | return false; |
| 3232 | } |
| 3233 | return strtolower($value->name) === 'clone'; |
| 3234 | } |
| 3235 | |
| 3236 | /** |
| 3237 | * Return a clone of `$g` with content y / height clamped so the |
| 3238 | * box's outer margin-box sits entirely inside the painter's |
| 3239 | * current page range. Used by `box-decoration-break: clone` to |
| 3240 | * make each fragment paint full borders at its visible extent. |
| 3241 | */ |
| 3242 | private function clampGeometryToPage(BoxGeometry $g): BoxGeometry |
| 3243 | { |
| 3244 | $clone = clone $g; |
| 3245 | if ($this->pageRangeStart === null || $this->pageRangeEnd === null) { |
| 3246 | return $clone; |
| 3247 | } |
| 3248 | $outerTop = $g->y - $g->paddingTop - $g->borderTop - $g->marginTop; |
| 3249 | $outerBottom = $g->y + $g->height + $g->paddingBottom + $g->borderBottom + $g->marginBottom; |
| 3250 | if ($outerTop < $this->pageRangeStart) { |
| 3251 | $delta = $this->pageRangeStart - $outerTop; |
| 3252 | $clone->y += $delta; |
| 3253 | $clone->height = max(0.0, $clone->height - $delta); |
| 3254 | } |
| 3255 | if ($outerBottom > $this->pageRangeEnd) { |
| 3256 | $delta = $outerBottom - $this->pageRangeEnd; |
| 3257 | $clone->height = max(0.0, $clone->height - $delta); |
| 3258 | } |
| 3259 | return $clone; |
| 3260 | } |
| 3261 | |
| 3262 | /** |
| 3263 | * Phase-1 `<img src="data:image/...">` painter: decodes the data URL, |
| 3264 | * spills the bytes to a tempfile, registers an Image XObject on the |
| 3265 | * current page via the writer, and emits `q cm /Name Do Q` at the |
| 3266 | * box's geometry. No-op when the writer or page is not wired in, or |
| 3267 | * when the src isn't a `data:image/png|jpeg` URL we can paint. |
| 3268 | */ |
| 3269 | private function paintImage(Box $box, ContentStream $stream, ?Box $parent = null): void |
| 3270 | { |
| 3271 | // Replaced elements render whether they are atomic-inline |
| 3272 | // (`display: inline-block`) OR blockified into a BlockBox. An |
| 3273 | // `<img>` / `<embed>` / `<object>` that is FLOATED, `display: |
| 3274 | // block`, OR out-of-flow (`position: absolute` / `fixed`, which |
| 3275 | // CSS Display §2.7 blockifies) becomes a BlockBox, but its |
| 3276 | // geometry is still laid out by the normal block-flow path — |
| 3277 | // including the CSS Sizing §4.2 aspect-ratio transfer that sizes a |
| 3278 | // `width: 50%; height: auto` abspos image — so it paints at the |
| 3279 | // right rect. Accept every such BlockBox replaced element. |
| 3280 | // |
| 3281 | // Two geometry paths are still wrong, so gate them out: |
| 3282 | // - a GRID ITEM replaced BlockBox reaches paint with grid-track |
| 3283 | // geometry not wired for direct raster placement (painting it |
| 3284 | // regressed css-grid −6); detect via the parent box type. A FLEX |
| 3285 | // ITEM, by contrast, is blockified (CSS Display §2.7) and its |
| 3286 | // main/cross size + §4.5 auto-minimum are resolved by the normal |
| 3287 | // block-flow measure, so its geometry IS correct — paint it; |
| 3288 | // - a VERTICAL-writing-mode replaced BlockBox (float/block WM |
| 3289 | // positioning is still wrong — see css-writing-modes follow-up). |
| 3290 | $parentIsGrid = $parent instanceof \Phpdftk\HtmlToPdf\Box\GridBox; |
| 3291 | $isBlockReplaced = $box instanceof \Phpdftk\HtmlToPdf\Box\BlockBox |
| 3292 | && !$parentIsGrid |
| 3293 | && !WritingMode::fromStyle($box->style)->isVertical(); |
| 3294 | if (!($box instanceof \Phpdftk\HtmlToPdf\Box\AtomicInlineBox) |
| 3295 | && !$isBlockReplaced |
| 3296 | ) { |
| 3297 | return; |
| 3298 | } |
| 3299 | if ($this->writer === null || $this->page === null) { |
| 3300 | return; |
| 3301 | } |
| 3302 | $element = $box->element; |
| 3303 | if ($element === null) { |
| 3304 | return; |
| 3305 | } |
| 3306 | // Inline foreign content (`<svg>` / `<math>`): the parser |
| 3307 | // tagged the subtree with its namespace, but our |
| 3308 | // AtomicInlineBox path historically only knew about `<img>`. |
| 3309 | // Detect each foreign namespace and route to the dedicated |
| 3310 | // painter before the img-src lookup. |
| 3311 | $foreignKind = \Phpdftk\HtmlToPdf\Box\BoxGenerator::foreignContentKind($element); |
| 3312 | if ($foreignKind === 'svg') { |
| 3313 | // Only the OUTERMOST `<svg>` is painted from here: an inner |
| 3314 | // one is a nested viewport the SVG pipeline already drew |
| 3315 | // while painting its ancestor (SVG 2 §7.5). Painting it |
| 3316 | // again emitted a second, unclipped copy at the HTML |
| 3317 | // pipeline's scale. |
| 3318 | if (!\Phpdftk\HtmlToPdf\Box\BoxGenerator::isOutermostSvg($element)) { |
| 3319 | return; |
| 3320 | } |
| 3321 | $this->paintInlineSvg($element, $box, $stream); |
| 3322 | return; |
| 3323 | } |
| 3324 | if ($foreignKind === 'math') { |
| 3325 | $this->paintInlineMath($element, $box, $stream); |
| 3326 | return; |
| 3327 | } |
| 3328 | // `<img src>`, `<embed src>`, `<object data>` and a `<video>`'s |
| 3329 | // `poster` frame all render an external image resource through the |
| 3330 | // same SVG / raster paint path (object-fit / object-position aware). |
| 3331 | $tag = strtolower($element->localName); |
| 3332 | if ($tag !== 'img' && $tag !== 'embed' && $tag !== 'object' && $tag !== 'video') { |
| 3333 | return; |
| 3334 | } |
| 3335 | $src = $element->getAttribute(match ($tag) { |
| 3336 | 'object' => 'data', |
| 3337 | 'video' => 'poster', |
| 3338 | default => 'src', |
| 3339 | }); |
| 3340 | if ($src === null) { |
| 3341 | return; |
| 3342 | } |
| 3343 | // `<img src="*.svg">` and `<img src="data:image/svg+xml,...">` |
| 3344 | // route through the SVG painter rather than the raster image |
| 3345 | // XObject path — SVG isn't a pixel container, so PdfWriter's |
| 3346 | // addImage rejects it. The painter has the loader / sizer / |
| 3347 | // renderer already used by background-image:url(svg); reuse |
| 3348 | // it here so an inline replaced `<img>` honours its CSS |
| 3349 | // geometry plus `object-fit` / `object-position`. |
| 3350 | if ($this->isSvgSrc($src)) { |
| 3351 | $this->paintImgSvg($element, $box, $stream, $src); |
| 3352 | return; |
| 3353 | } |
| 3354 | // Per-page cache: the same src only spills + registers once on |
| 3355 | // this page. Multi-page reuse still re-registers — XObject |
| 3356 | // resource names are page-local in PdfWriter. |
| 3357 | if (isset($this->imageNameCache[$src])) { |
| 3358 | $name = $this->imageNameCache[$src]; |
| 3359 | } else { |
| 3360 | $resolvedPath = $this->resolveImageSrc($src); |
| 3361 | if ($resolvedPath === null) { |
| 3362 | return; |
| 3363 | } |
| 3364 | // ImageParser throws on malformed bytes; swallow + fall back to |
| 3365 | // the alt-text path (or empty box) rather than crashing the whole |
| 3366 | // render because of one bad asset. |
| 3367 | try { |
| 3368 | $name = $this->writer->addImage($resolvedPath, $this->page); |
| 3369 | } catch (\Throwable) { |
| 3370 | return; |
| 3371 | } |
| 3372 | $this->imageNameCache[$src] = $name; |
| 3373 | } |
| 3374 | $geo = $box->geometry; |
| 3375 | if ($geo->width <= 0.0) { |
| 3376 | // No declared size — skip; the alt-text fallback path covers |
| 3377 | // unsized images via the BoxGenerator's InlineBox lowering. |
| 3378 | return; |
| 3379 | } |
| 3380 | $height = $geo->height > 0.0 ? $geo->height : $geo->width; |
| 3381 | // CSS Images 3 §5: `object-fit` controls the image's scale |
| 3382 | // within its declared content rect. `fill` (default) stretches; |
| 3383 | // `contain` / `cover` / `none` / `scale-down` preserve aspect. |
| 3384 | // `object-position` selects which part of the box the image |
| 3385 | // anchors to when there's slack — defaults to centre. |
| 3386 | $fit = $this->objectFitKeyword($box); |
| 3387 | $rect = $this->resolveObjectFit($fit, $src, $geo->width, $height); |
| 3388 | $positionValue = $box->style->get('object-position'); |
| 3389 | if ($positionValue !== null |
| 3390 | && ($rect['w'] !== $geo->width || $rect['h'] !== $height) |
| 3391 | ) { |
| 3392 | $pos = $this->resolveBackgroundPosition( |
| 3393 | $positionValue, |
| 3394 | $rect['w'], |
| 3395 | $rect['h'], |
| 3396 | $geo->width, |
| 3397 | $height, |
| 3398 | ); |
| 3399 | $rect['offsetX'] = $pos['offsetX']; |
| 3400 | $rect['offsetY'] = $pos['offsetY']; |
| 3401 | } |
| 3402 | // PDF y-axis is inverted; the `cm` matrix maps the unit square |
| 3403 | // [0,1]^2 to the box's PDF-space rect. |
| 3404 | $pdfY = $this->pageHeight - $geo->y - $height; |
| 3405 | $stream->saveGraphicsState(); |
| 3406 | // Clip to the box rect so `cover` overflow doesn't bleed into |
| 3407 | // sibling boxes. |
| 3408 | $stream->rectangle($geo->x, $pdfY, $geo->width, $height); |
| 3409 | $stream->clip(); |
| 3410 | $stream->endPath(); |
| 3411 | $stream->concatMatrix( |
| 3412 | $rect['w'], |
| 3413 | 0.0, |
| 3414 | 0.0, |
| 3415 | $rect['h'], |
| 3416 | $geo->x + $rect['offsetX'], |
| 3417 | $pdfY + ($height - $rect['h'] - $rect['offsetY']), |
| 3418 | ); |
| 3419 | $stream->doXObject($name); |
| 3420 | $stream->restoreGraphicsState(); |
| 3421 | } |
| 3422 | |
| 3423 | /** |
| 3424 | * Read the box's cascaded `object-fit` value, normalised to one of |
| 3425 | * `fill` / `contain` / `cover` / `none` / `scale-down`. Unknown |
| 3426 | * keywords fall back to `fill`. |
| 3427 | */ |
| 3428 | private function objectFitKeyword(Box $box): string |
| 3429 | { |
| 3430 | $value = $box->style->get('object-fit'); |
| 3431 | if ($value instanceof Keyword) { |
| 3432 | $kw = strtolower($value->name); |
| 3433 | if (in_array($kw, ['fill', 'contain', 'cover', 'none', 'scale-down'], true)) { |
| 3434 | return $kw; |
| 3435 | } |
| 3436 | } |
| 3437 | return 'fill'; |
| 3438 | } |
| 3439 | |
| 3440 | /** |
| 3441 | * Compute the painted rect for a replaced element under `object-fit`. |
| 3442 | * Mirrors CSS Images 3 §5 semantics: |
| 3443 | * - `fill` → stretch to the box. |
| 3444 | * - `contain` → preserve aspect, fit inside; centred slack. |
| 3445 | * - `cover` → preserve aspect, fill; clipped overflow. |
| 3446 | * - `none` → natural size; centred slack. |
| 3447 | * - `scale-down` → min(`none`, `contain`) — uses natural size when |
| 3448 | * the image already fits, otherwise behaves like `contain`. |
| 3449 | * |
| 3450 | * @return array{w: float, h: float, offsetX: float, offsetY: float} |
| 3451 | */ |
| 3452 | private function resolveObjectFit( |
| 3453 | string $fit, |
| 3454 | string $src, |
| 3455 | float $boxWidth, |
| 3456 | float $boxHeight, |
| 3457 | ): array { |
| 3458 | if ($fit === 'fill') { |
| 3459 | return ['w' => $boxWidth, 'h' => $boxHeight, 'offsetX' => 0.0, 'offsetY' => 0.0]; |
| 3460 | } |
| 3461 | $intrinsic = $this->intrinsicSize($src); |
| 3462 | if ($intrinsic === null) { |
| 3463 | return ['w' => $boxWidth, 'h' => $boxHeight, 'offsetX' => 0.0, 'offsetY' => 0.0]; |
| 3464 | } |
| 3465 | [$natW, $natH] = $intrinsic; |
| 3466 | if ($fit === 'none') { |
| 3467 | return [ |
| 3468 | 'w' => (float) $natW, |
| 3469 | 'h' => (float) $natH, |
| 3470 | 'offsetX' => ($boxWidth - $natW) / 2, |
| 3471 | 'offsetY' => ($boxHeight - $natH) / 2, |
| 3472 | ]; |
| 3473 | } |
| 3474 | $scaleW = $boxWidth / $natW; |
| 3475 | $scaleH = $boxHeight / $natH; |
| 3476 | if ($fit === 'scale-down') { |
| 3477 | // Use 1.0 (natural) when it already fits; else contain. |
| 3478 | $scale = min(1.0, $scaleW, $scaleH); |
| 3479 | } elseif ($fit === 'cover') { |
| 3480 | $scale = max($scaleW, $scaleH); |
| 3481 | } else { |
| 3482 | // contain |
| 3483 | $scale = min($scaleW, $scaleH); |
| 3484 | } |
| 3485 | $finalW = $natW * $scale; |
| 3486 | $finalH = $natH * $scale; |
| 3487 | return [ |
| 3488 | 'w' => $finalW, |
| 3489 | 'h' => $finalH, |
| 3490 | 'offsetX' => ($boxWidth - $finalW) / 2, |
| 3491 | 'offsetY' => ($boxHeight - $finalH) / 2, |
| 3492 | ]; |
| 3493 | } |
| 3494 | |
| 3495 | /** |
| 3496 | * Resolve an `<img src>` value to a real path that |
| 3497 | * {@see PdfWriter::addImage} can read. Handles: |
| 3498 | * - `data:image/{png,jpeg}[;base64],...` → spilled tempfile |
| 3499 | * - `http(s)://...` → fetched via `phpdftk/resource-loader` |
| 3500 | * (4F.5) when a loader was supplied; spilled to a tempfile. |
| 3501 | * Without a loader, http(s) silently drops the image. |
| 3502 | * - relative paths → joined with `baseDir`, must resolve under it |
| 3503 | * |
| 3504 | * Returns null when the source isn't a Phase-1 supported variant or |
| 3505 | * when path resolution escapes `baseDir`. |
| 3506 | */ |
| 3507 | private function resolveImageSrc(string $src): ?string |
| 3508 | { |
| 3509 | if (str_starts_with($src, 'data:')) { |
| 3510 | return $this->materializeDataUrl($src); |
| 3511 | } |
| 3512 | if (str_starts_with($src, 'http://') || str_starts_with($src, 'https://')) { |
| 3513 | return $this->fetchHttpSrc($src); |
| 3514 | } |
| 3515 | return (new \Phpdftk\Filesystem\ResourceLoader($this->baseDir, $this->sandboxRoot)) |
| 3516 | ->resolveLocalPath($src); |
| 3517 | } |
| 3518 | |
| 3519 | /** |
| 3520 | * 4F.5 — fetch an `http(s)://` `<img src>` through the injected |
| 3521 | * ResourceLoader and materialise the bytes to a temp file so |
| 3522 | * the existing `ImageParser` + `PdfWriter::addImage` flow can |
| 3523 | * register them as a PDF XObject. Returns the temp path on |
| 3524 | * success or null on any failure (no loader configured, SSRF |
| 3525 | * policy violation, network error, non-2xx, body cap exceeded, |
| 3526 | * write failure) — all of which surface as the no-image |
| 3527 | * outcome. |
| 3528 | */ |
| 3529 | private function fetchHttpSrc(string $src): ?string |
| 3530 | { |
| 3531 | if ($this->resourceLoader === null) { |
| 3532 | return null; |
| 3533 | } |
| 3534 | try { |
| 3535 | $result = $this->resourceLoader->fetch($src); |
| 3536 | } catch (SsrfBlockedException | FetchFailedException) { |
| 3537 | return null; |
| 3538 | } |
| 3539 | $tmpPath = tempnam(sys_get_temp_dir(), 'phpdftk-http-img-'); |
| 3540 | if ($tmpPath === false) { |
| 3541 | return null; |
| 3542 | } |
| 3543 | try { |
| 3544 | \Phpdftk\Filesystem\LocalFilesystem::writeFile($tmpPath, $result->bytes); |
| 3545 | } catch (\Throwable) { |
| 3546 | @unlink($tmpPath); |
| 3547 | return null; |
| 3548 | } |
| 3549 | $this->tempImagePaths[] = $tmpPath; |
| 3550 | return $tmpPath; |
| 3551 | } |
| 3552 | |
| 3553 | /** |
| 3554 | * Decode `data:image/{png,jpeg};base64,...` (or the rfc2397 non-base64 |
| 3555 | * form) into a tempfile so {@see PdfWriter::addImage} can parse it. |
| 3556 | * Returns null when the URL isn't a Phase-1 supported variant. |
| 3557 | */ |
| 3558 | private function materializeDataUrl(string $dataUrl): ?string |
| 3559 | { |
| 3560 | // `data:image/png;base64,iVBORw0K...` — match the MIME + optional |
| 3561 | // `;base64` flag + the payload. |
| 3562 | if (preg_match('~^data:image/(png|jpeg|jpg);(base64,)?(.*)$~s', $dataUrl, $m) !== 1) { |
| 3563 | return null; |
| 3564 | } |
| 3565 | $mime = $m[1] === 'jpg' ? 'jpeg' : $m[1]; |
| 3566 | $payload = $m[2] === 'base64,' |
| 3567 | ? base64_decode($m[3], strict: true) |
| 3568 | : urldecode($m[3]); |
| 3569 | if ($payload === false || $payload === '') { |
| 3570 | return null; |
| 3571 | } |
| 3572 | $ext = $mime === 'jpeg' ? 'jpg' : 'png'; |
| 3573 | $tempPath = tempnam(sys_get_temp_dir(), 'phpdftk-img-') . '.' . $ext; |
| 3574 | \Phpdftk\Filesystem\LocalFilesystem::writeFile($tempPath, $payload); |
| 3575 | $this->tempImagePaths[] = $tempPath; |
| 3576 | return $tempPath; |
| 3577 | } |
| 3578 | |
| 3579 | /** |
| 3580 | * Resolve CSS Backgrounds 3 §3.5 `background-clip` to one of |
| 3581 | * `border-box` / `padding-box` / `content-box`. Unknown |
| 3582 | * keywords fall back to the initial `border-box`. |
| 3583 | */ |
| 3584 | private function resolveBackgroundClip(Box $box): string |
| 3585 | { |
| 3586 | $value = $box->style->get('background-clip'); |
| 3587 | if (!($value instanceof Keyword)) { |
| 3588 | return 'border-box'; |
| 3589 | } |
| 3590 | $name = strtolower($value->name); |
| 3591 | // CSS Backgrounds 4 §3.5 — `border-area` paints only inside |
| 3592 | // the border ring (border-box ∖ padding-box). The bg-clip |
| 3593 | // resolution still hands back the OUTER bounding rect |
| 3594 | // (border-box dimensions) so the caller computes positions |
| 3595 | // against that, but the actual paint is intersected with |
| 3596 | // the ring path; the special-case emission lives in |
| 3597 | // `paintBackground`. |
| 3598 | if (in_array($name, ['border-box', 'padding-box', 'content-box', 'border-area'], true)) { |
| 3599 | return $name; |
| 3600 | } |
| 3601 | return 'border-box'; |
| 3602 | } |
| 3603 | |
| 3604 | /** |
| 3605 | * Resolve CSS Backgrounds 3 §3.4 `background-origin` to one of |
| 3606 | * `padding-box` (initial) / `border-box` / `content-box`. The |
| 3607 | * origin rect anchors `background-position`'s percentage math. |
| 3608 | */ |
| 3609 | private function resolveBackgroundOrigin(Box $box): string |
| 3610 | { |
| 3611 | $value = $box->style->get('background-origin'); |
| 3612 | if (!($value instanceof Keyword)) { |
| 3613 | return 'padding-box'; |
| 3614 | } |
| 3615 | $name = strtolower($value->name); |
| 3616 | if (in_array($name, ['border-box', 'padding-box', 'content-box'], true)) { |
| 3617 | return $name; |
| 3618 | } |
| 3619 | return 'padding-box'; |
| 3620 | } |
| 3621 | |
| 3622 | /** |
| 3623 | * Compute the (x, top, width, height) rect that |
| 3624 | * `background-origin: <value>` selects on `$box`. `x/top` are in |
| 3625 | * top-down layout space. |
| 3626 | * |
| 3627 | * @return array{x: float, top: float, width: float, height: float} |
| 3628 | */ |
| 3629 | private function backgroundOriginRect(Box $box, string $origin): array |
| 3630 | { |
| 3631 | $g = $box->geometry; |
| 3632 | switch ($origin) { |
| 3633 | case 'content-box': |
| 3634 | return [ |
| 3635 | 'x' => $g->x, |
| 3636 | 'top' => $g->y, |
| 3637 | 'width' => $g->width, |
| 3638 | 'height' => $g->height, |
| 3639 | ]; |
| 3640 | case 'border-box': |
| 3641 | return [ |
| 3642 | 'x' => $g->x - $g->paddingLeft - $g->borderLeft, |
| 3643 | 'top' => $g->y - $g->paddingTop - $g->borderTop, |
| 3644 | 'width' => $g->paddingLeft + $g->width + $g->paddingRight |
| 3645 | + $g->borderLeft + $g->borderRight, |
| 3646 | 'height' => $g->paddingTop + $g->height + $g->paddingBottom |
| 3647 | + $g->borderTop + $g->borderBottom, |
| 3648 | ]; |
| 3649 | default: // 'padding-box' |
| 3650 | return [ |
| 3651 | 'x' => $g->x - $g->paddingLeft, |
| 3652 | 'top' => $g->y - $g->paddingTop, |
| 3653 | 'width' => $g->paddingLeft + $g->width + $g->paddingRight, |
| 3654 | 'height' => $g->paddingTop + $g->height + $g->paddingBottom, |
| 3655 | ]; |
| 3656 | } |
| 3657 | } |
| 3658 | |
| 3659 | /** |
| 3660 | * CSS Overflow 3 §3 — return true when this box should clip its |
| 3661 | * descendants on at least one axis. `visible` (initial) → no |
| 3662 | * clip; any of `hidden` / `clip` / `scroll` / `auto` → clip. |
| 3663 | * Per-axis: when `overflow-x` is constraining and `overflow-y` |
| 3664 | * isn't (or vice versa), the clip rect extends to the page on |
| 3665 | * the unconstrained axis so spec-correct one-axis clipping holds. |
| 3666 | */ |
| 3667 | private function shouldOverflowClip(Box $box): bool |
| 3668 | { |
| 3669 | // CSS Overflow 3 §3.3 — when the body's overflow has propagated |
| 3670 | // to the root, the body itself paints as if overflow:visible. |
| 3671 | if ($box === $this->propagatedOverflowBox) { |
| 3672 | return false; |
| 3673 | } |
| 3674 | return $this->axisClips($box, 'x') || $this->axisClips($box, 'y'); |
| 3675 | } |
| 3676 | |
| 3677 | /** |
| 3678 | * Return true when the given axis (`'x'` or `'y'`) should clip |
| 3679 | * for this box. Checks the axis-specific longhand first, then |
| 3680 | * the `overflow` shorthand. |
| 3681 | */ |
| 3682 | private function axisClips(Box $box, string $axis): bool |
| 3683 | { |
| 3684 | // CSS Overflow 3 §3.3 — when overflow propagated from body to |
| 3685 | // root, the root's effective overflow is the body's. Per §2.1 a |
| 3686 | // viewport can't mix a clipped axis with a `visible` one: if the |
| 3687 | // body constrained EITHER axis, the other (`visible`) axis |
| 3688 | // computes to `auto` on the viewport and therefore also clips. |
| 3689 | // (WPT overflow-body-propagation-007 pairs body `overflow-x: clip` |
| 3690 | // against a ref `html { overflow: hidden auto }` — both axes clip.) |
| 3691 | if ($box === $this->propagatedOverflowRoot && $this->propagatedOverflowBox !== null) { |
| 3692 | return $this->originalAxisClips($this->propagatedOverflowBox, 'x') |
| 3693 | || $this->originalAxisClips($this->propagatedOverflowBox, 'y'); |
| 3694 | } |
| 3695 | return $this->originalAxisClips($box, $axis); |
| 3696 | } |
| 3697 | |
| 3698 | /** True when the box's `overflow` (or per-axis) uses the `clip` keyword. */ |
| 3699 | private function hasOverflowClip(Box $box): bool |
| 3700 | { |
| 3701 | foreach (['overflow', 'overflow-x', 'overflow-y'] as $prop) { |
| 3702 | $v = $box->style->get($prop); |
| 3703 | if ($v instanceof Keyword && strtolower($v->name) === 'clip') { |
| 3704 | return true; |
| 3705 | } |
| 3706 | } |
| 3707 | return false; |
| 3708 | } |
| 3709 | |
| 3710 | /** |
| 3711 | * CSS Overflow 3 §4.2 — resolve `overflow-clip-margin` to a per-edge |
| 3712 | * OUTWARD expansion (left, top, right, bottom) from the padding box. |
| 3713 | * The value is `[ <visual-box> || <length [0,∞]> ]`: the reference box |
| 3714 | * (content-box / padding-box[default] / border-box) sets the base |
| 3715 | * edge, the length pushes further out. Only applies to `overflow: |
| 3716 | * clip`; returns zeros otherwise. |
| 3717 | * |
| 3718 | * @return array{0: float, 1: float, 2: float, 3: float} |
| 3719 | */ |
| 3720 | private function overflowClipMargin(Box $box): array |
| 3721 | { |
| 3722 | // CSS Overflow 3 §4.2 — `overflow-clip-margin` applies to a box |
| 3723 | // that clips via `overflow: clip` OR paint containment |
| 3724 | // (`contain: paint`), the latter clipping even when `overflow` |
| 3725 | // stays `visible` (WPT paint-containment-svg). |
| 3726 | if (!$this->hasOverflowClip($box) && !$this->containImpliesPaintClip($box)) { |
| 3727 | return [0.0, 0.0, 0.0, 0.0]; |
| 3728 | } |
| 3729 | $value = $box->style->get('overflow-clip-margin'); |
| 3730 | $items = $value instanceof \Phpdftk\Css\Value\ValueList |
| 3731 | ? $value->values |
| 3732 | : ($value !== null ? [$value] : []); |
| 3733 | $refBox = 'padding-box'; |
| 3734 | $margin = 0.0; |
| 3735 | foreach ($items as $item) { |
| 3736 | if ($item instanceof Keyword) { |
| 3737 | $n = strtolower($item->name); |
| 3738 | if (in_array($n, ['content-box', 'padding-box', 'border-box'], true)) { |
| 3739 | $refBox = $n; |
| 3740 | } |
| 3741 | } elseif ($item instanceof \Phpdftk\Css\Value\Length) { |
| 3742 | $margin = max(0.0, $item->value); |
| 3743 | } |
| 3744 | } |
| 3745 | $g = $box->geometry; |
| 3746 | $baseL = $baseT = $baseR = $baseB = 0.0; |
| 3747 | if ($refBox === 'border-box') { |
| 3748 | $baseL = $g->borderLeft; |
| 3749 | $baseT = $g->borderTop; |
| 3750 | $baseR = $g->borderRight; |
| 3751 | $baseB = $g->borderBottom; |
| 3752 | } elseif ($refBox === 'content-box') { |
| 3753 | $baseL = -$g->paddingLeft; |
| 3754 | $baseT = -$g->paddingTop; |
| 3755 | $baseR = -$g->paddingRight; |
| 3756 | $baseB = -$g->paddingBottom; |
| 3757 | } |
| 3758 | return [$baseL + $margin, $baseT + $margin, $baseR + $margin, $baseB + $margin]; |
| 3759 | } |
| 3760 | |
| 3761 | private function originalAxisClips(Box $box, string $axis): bool |
| 3762 | { |
| 3763 | // CSS Contain §2.3 — paint containment (`contain: paint | |
| 3764 | // content | strict`) clips descendants to the padding box on |
| 3765 | // BOTH axes, independent of and overriding `overflow: visible`. |
| 3766 | if ($this->containImpliesPaintClip($box)) { |
| 3767 | return true; |
| 3768 | } |
| 3769 | foreach (["overflow-$axis", 'overflow'] as $prop) { |
| 3770 | $value = $box->style->get($prop); |
| 3771 | if (!($value instanceof Keyword)) { |
| 3772 | continue; |
| 3773 | } |
| 3774 | $name = strtolower($value->name); |
| 3775 | if ($name === 'visible') { |
| 3776 | return false; |
| 3777 | } |
| 3778 | if ($name === 'hidden' || $name === 'clip' || $name === 'scroll' || $name === 'auto') { |
| 3779 | return true; |
| 3780 | } |
| 3781 | } |
| 3782 | return false; |
| 3783 | } |
| 3784 | |
| 3785 | /** |
| 3786 | * Emit a clip rect for CSS Overflow 3 §4. Unconstrained axes are |
| 3787 | * widened to the full page so the clip is effectively one-axis; |
| 3788 | * fully-constrained boxes clip to the padding rect on both axes. |
| 3789 | * Caller is responsible for the `saveGraphicsState` / |
| 3790 | * `restoreGraphicsState` envelope. |
| 3791 | */ |
| 3792 | /** |
| 3793 | * CSS 2.1 §17.5.1 background layers 2 and 3 — column groups and |
| 3794 | * columns. `<col>` / `<colgroup>` generate no boxes of their own, |
| 3795 | * so their background is painted into the CELLS of the columns they |
| 3796 | * cover: the background POSITIONING AREA is the whole column strip, |
| 3797 | * while the paint is CLIPPED to each cell's border box. |
| 3798 | * |
| 3799 | * That split matters twice over. It is what the spec asks for, so a |
| 3800 | * `background-image` on a column tiles across the strip rather than |
| 3801 | * restarting in every cell; and because the paint only ever happens |
| 3802 | * per-cell, a column with no cells renders nothing at all — which |
| 3803 | * the spec also requires, and which a naive "fill the strip" would |
| 3804 | * get wrong. |
| 3805 | */ |
| 3806 | private function paintTableColumnBackgrounds( |
| 3807 | \Phpdftk\HtmlToPdf\Box\TableBox $table, |
| 3808 | ContentStream $stream, |
| 3809 | ): void { |
| 3810 | if ($table->columnLayers === []) { |
| 3811 | return; |
| 3812 | } |
| 3813 | /** @var array<int, list<\Phpdftk\HtmlToPdf\Box\TableCellBox>> $byColumn */ |
| 3814 | $byColumn = []; |
| 3815 | $this->collectTableCellsByColumn($table, $byColumn); |
| 3816 | if ($byColumn === []) { |
| 3817 | return; |
| 3818 | } |
| 3819 | // The strip's block extent is the table's whole row area. |
| 3820 | $stripTop = null; |
| 3821 | $stripBottom = null; |
| 3822 | foreach ($byColumn as $cells) { |
| 3823 | foreach ($cells as $cell) { |
| 3824 | $rect = $this->cellBorderBoxRect($cell); |
| 3825 | $stripTop = $stripTop === null ? $rect['y'] : min($stripTop, $rect['y']); |
| 3826 | $bottom = $rect['y'] + $rect['h']; |
| 3827 | $stripBottom = $stripBottom === null ? $bottom : max($stripBottom, $bottom); |
| 3828 | } |
| 3829 | } |
| 3830 | if ($stripTop === null || $stripBottom === null || $stripBottom <= $stripTop) { |
| 3831 | return; |
| 3832 | } |
| 3833 | foreach ($table->columnLayers as $layer) { |
| 3834 | $colBox = $layer['box']; |
| 3835 | if (!$this->boxHasPaintableBackground($colBox)) { |
| 3836 | continue; |
| 3837 | } |
| 3838 | $left = null; |
| 3839 | $right = null; |
| 3840 | /** @var list<\Phpdftk\HtmlToPdf\Box\TableCellBox> $covered */ |
| 3841 | $covered = []; |
| 3842 | for ($c = $layer['start']; $c < $layer['start'] + $layer['span']; $c++) { |
| 3843 | foreach ($byColumn[$c] ?? [] as $cell) { |
| 3844 | $rect = $this->cellBorderBoxRect($cell); |
| 3845 | $left = $left === null ? $rect['x'] : min($left, $rect['x']); |
| 3846 | $edge = $rect['x'] + $rect['w']; |
| 3847 | $right = $right === null ? $edge : max($right, $edge); |
| 3848 | $covered[] = $cell; |
| 3849 | } |
| 3850 | } |
| 3851 | if ($covered === [] || $left === null || $right === null || $right <= $left) { |
| 3852 | continue; |
| 3853 | } |
| 3854 | // Stand the column box up at the strip's geometry so the |
| 3855 | // existing background machinery (colour, images, repeat, |
| 3856 | // size, position) resolves against the strip. |
| 3857 | $strip = new \Phpdftk\HtmlToPdf\Layout\BoxGeometry(); |
| 3858 | $strip->x = $left; |
| 3859 | $strip->y = $stripTop; |
| 3860 | $strip->width = $right - $left; |
| 3861 | $strip->height = $stripBottom - $stripTop; |
| 3862 | $original = $colBox->geometry; |
| 3863 | $colBox->geometry = $strip; |
| 3864 | foreach ($covered as $cell) { |
| 3865 | $rect = $this->cellBorderBoxRect($cell); |
| 3866 | if ($rect['w'] <= 0.0 || $rect['h'] <= 0.0) { |
| 3867 | continue; |
| 3868 | } |
| 3869 | $stream->saveGraphicsState(); |
| 3870 | $stream->rectangle( |
| 3871 | $rect['x'], |
| 3872 | $this->pageHeight - $rect['y'] - $rect['h'], |
| 3873 | $rect['w'], |
| 3874 | $rect['h'], |
| 3875 | ); |
| 3876 | $stream->clip(); |
| 3877 | $this->paintBackground($colBox, $stream); |
| 3878 | $stream->restoreGraphicsState(); |
| 3879 | } |
| 3880 | $colBox->geometry = $original; |
| 3881 | } |
| 3882 | } |
| 3883 | |
| 3884 | /** |
| 3885 | * Border-box rect of a table cell in layout (top-down) coordinates. |
| 3886 | * |
| 3887 | * @return array{x: float, y: float, w: float, h: float} |
| 3888 | */ |
| 3889 | private function cellBorderBoxRect(\Phpdftk\HtmlToPdf\Box\TableCellBox $cell): array |
| 3890 | { |
| 3891 | $g = $cell->geometry; |
| 3892 | return [ |
| 3893 | 'x' => $g->x - $g->paddingLeft - $g->borderLeft, |
| 3894 | 'y' => $g->y - $g->paddingTop - $g->borderTop, |
| 3895 | 'w' => $g->paddingLeft + $g->width + $g->paddingRight |
| 3896 | + $g->borderLeft + $g->borderRight, |
| 3897 | 'h' => $g->paddingTop + $g->height + $g->paddingBottom |
| 3898 | + $g->borderTop + $g->borderBottom, |
| 3899 | ]; |
| 3900 | } |
| 3901 | |
| 3902 | /** |
| 3903 | * Collect every cell in the table, keyed by the column it starts in. |
| 3904 | * A cell spanning N columns is registered under each of them so a |
| 3905 | * column background reaches the part of the cell it covers (the clip |
| 3906 | * still confines the paint to the cell itself). |
| 3907 | * |
| 3908 | * @param array<int, list<\Phpdftk\HtmlToPdf\Box\TableCellBox>> $byColumn |
| 3909 | */ |
| 3910 | private function collectTableCellsByColumn(Box $box, array &$byColumn): void |
| 3911 | { |
| 3912 | foreach ($box->children as $child) { |
| 3913 | if ($child instanceof \Phpdftk\HtmlToPdf\Box\TableBox) { |
| 3914 | // A nested table owns its own column layers. |
| 3915 | continue; |
| 3916 | } |
| 3917 | if ($child instanceof \Phpdftk\HtmlToPdf\Box\TableCellBox |
| 3918 | && $child->tableColumn !== null |
| 3919 | ) { |
| 3920 | for ($i = 0; $i < $child->tableColumnSpan; $i++) { |
| 3921 | $byColumn[$child->tableColumn + $i][] = $child; |
| 3922 | } |
| 3923 | continue; |
| 3924 | } |
| 3925 | $this->collectTableCellsByColumn($child, $byColumn); |
| 3926 | } |
| 3927 | } |
| 3928 | |
| 3929 | private function emitOverflowClipPath(ContentStream $stream, Box $box): void |
| 3930 | { |
| 3931 | $g = $box->geometry; |
| 3932 | $padX = $g->x - $g->paddingLeft; |
| 3933 | $padTop = $g->y - $g->paddingTop; |
| 3934 | $padWidth = $g->paddingLeft + $g->width + $g->paddingRight; |
| 3935 | $padHeight = $g->paddingTop + $g->height + $g->paddingBottom; |
| 3936 | if ($padWidth <= 0.0 || $padHeight <= 0.0) { |
| 3937 | return; |
| 3938 | } |
| 3939 | $clipsX = $this->axisClips($box, 'x'); |
| 3940 | $clipsY = $this->axisClips($box, 'y'); |
| 3941 | // CSS Overflow 3 §4.2 — `overflow-clip-margin` expands the clip |
| 3942 | // region outward from a visual reference box (only for the `clip` |
| 3943 | // keyword; hidden/scroll/auto always clip at the padding box). |
| 3944 | [$expandL, $expandT, $expandR, $expandB] = $this->overflowClipMargin($box); |
| 3945 | // CSS Backgrounds 3 §5.3 — a rounded box clips its overflow to the |
| 3946 | // padding box's ROUNDED corners (border radii reduced by the border |
| 3947 | // widths). Only the standard both-axes padding-box clip is rounded; |
| 3948 | // one-axis clips and `overflow-clip-margin` expansions keep the rect. |
| 3949 | if ($clipsX && $clipsY |
| 3950 | && $expandL === 0.0 && $expandT === 0.0 && $expandR === 0.0 && $expandB === 0.0 |
| 3951 | ) { |
| 3952 | $borderBoxW = $g->borderLeft + $padWidth + $g->borderRight; |
| 3953 | $borderBoxH = $g->borderTop + $padHeight + $g->borderBottom; |
| 3954 | $radii = $this->borderRadiiXY($box, $borderBoxW, $borderBoxH); |
| 3955 | if ($this->radiiAnyPositive($radii)) { |
| 3956 | $padRadii = $this->reduceRadiiToBox($radii, 'padding-box', $g); |
| 3957 | $this->buildRoundedRectPath($stream, $padX, $padTop, $padWidth, $padHeight, $padRadii, $this->cornerShapes($box)); |
| 3958 | $stream->clip(); |
| 3959 | $stream->endPath(); |
| 3960 | return; |
| 3961 | } |
| 3962 | } |
| 3963 | $rectX = $clipsX ? $padX - $expandL : 0.0; |
| 3964 | $rectWidth = $clipsX ? $padWidth + $expandL + $expandR : $this->pageWidth; |
| 3965 | $rectTop = $clipsY ? $padTop - $expandT : 0.0; |
| 3966 | $rectHeight = $clipsY ? $padHeight + $expandT + $expandB : $this->pageHeight; |
| 3967 | $pdfY = $this->pageHeight - $rectTop - $rectHeight; |
| 3968 | $stream->rectangle($rectX, $pdfY, $rectWidth, $rectHeight); |
| 3969 | $stream->clip(); |
| 3970 | $stream->endPath(); |
| 3971 | } |
| 3972 | |
| 3973 | /** |
| 3974 | * CSS 2.1 §11.1.2 `clip: rect(top, right, bottom, left)` — resolve the |
| 3975 | * clipping rectangle (physical layout coords, y-down) for an |
| 3976 | * absolutely-positioned box, or `null` when `clip` is `auto`, the box |
| 3977 | * is not absolutely positioned, or the value isn't a `rect()`. |
| 3978 | * `top`/`left` offset from the border box's top/left edge; `right`/ |
| 3979 | * `bottom` are measured from those same edges; `auto` means the |
| 3980 | * corresponding border edge. |
| 3981 | * |
| 3982 | * @return array{x: float, y: float, w: float, h: float}|null |
| 3983 | */ |
| 3984 | private function resolveClipRect(Box $box): ?array |
| 3985 | { |
| 3986 | $clip = $box->style->get('clip'); |
| 3987 | $edges = null; |
| 3988 | if ($clip instanceof \Phpdftk\Css\Value\CssFunction |
| 3989 | && strtolower($clip->name) === 'rect' |
| 3990 | && count($clip->arguments) === 4 |
| 3991 | ) { |
| 3992 | // Comma-separated legacy form: `clip: rect(t, r, b, l)`. |
| 3993 | $edges = $clip->arguments; |
| 3994 | } elseif ($clip instanceof \Phpdftk\Css\Value\RectShape |
| 3995 | && count($clip->edges) === 4 |
| 3996 | ) { |
| 3997 | // Whitespace-separated legacy form: `clip: rect(t r b l)` parses |
| 3998 | // to a RectShape (the CSS Shapes 2 `rect()` grammar) whose edges |
| 3999 | // carry the same top/right/bottom/left border-box-origin semantics |
| 4000 | // as the comma form (CSS 2.1 §11.1.2). `round <radius>` never |
| 4001 | // appears on the legacy `clip` property, so it is ignored. |
| 4002 | $edges = $clip->edges; |
| 4003 | } |
| 4004 | if ($edges === null) { |
| 4005 | return null; |
| 4006 | } |
| 4007 | $position = $box->style->get('position'); |
| 4008 | if (!($position instanceof Keyword)) { |
| 4009 | return null; |
| 4010 | } |
| 4011 | $pos = strtolower($position->name); |
| 4012 | if ($pos !== 'absolute' && $pos !== 'fixed') { |
| 4013 | return null; |
| 4014 | } |
| 4015 | $g = $box->geometry; |
| 4016 | $borderBoxX = $g->x - $g->paddingLeft - $g->borderLeft; |
| 4017 | $borderBoxY = $g->y - $g->paddingTop - $g->borderTop; |
| 4018 | $borderBoxW = $g->borderLeft + $g->paddingLeft + $g->width |
| 4019 | + $g->paddingRight + $g->borderRight; |
| 4020 | $borderBoxH = $g->borderTop + $g->paddingTop + $g->height |
| 4021 | + $g->paddingBottom + $g->borderBottom; |
| 4022 | // rect(top, right, bottom, left); `auto` → border edge. |
| 4023 | [$topV, $rightV, $bottomV, $leftV] = $edges; |
| 4024 | $top = $this->clipEdgePx($topV, 0.0); |
| 4025 | $right = $this->clipEdgePx($rightV, $borderBoxW); |
| 4026 | $bottom = $this->clipEdgePx($bottomV, $borderBoxH); |
| 4027 | $left = $this->clipEdgePx($leftV, 0.0); |
| 4028 | $x = $borderBoxX + $left; |
| 4029 | $y = $borderBoxY + $top; |
| 4030 | return [ |
| 4031 | 'x' => $x, |
| 4032 | 'y' => $y, |
| 4033 | 'w' => max(0.0, ($borderBoxX + $right) - $x), |
| 4034 | 'h' => max(0.0, ($borderBoxY + $bottom) - $y), |
| 4035 | ]; |
| 4036 | } |
| 4037 | |
| 4038 | /** |
| 4039 | * CSS Masking 1 §6 — apply a `clip-path: <basic-shape>` to the box by |
| 4040 | * pushing a PDF clip path for the shape, resolved against the BORDER |
| 4041 | * box. Returns true when a clip was pushed (caller restores after the |
| 4042 | * children loop). Supports inset / circle / ellipse / polygon; the |
| 4043 | * `<geometry-box>` form and `url()` references are not handled. |
| 4044 | */ |
| 4045 | /** |
| 4046 | * CSS Masking 1 §4 — true when the box's `mask-image` is a single |
| 4047 | * `url(...)` layer we cannot resolve to a mask image. Such a failed |
| 4048 | * layer is transparent black, so it masks the element (and subtree) |
| 4049 | * fully out. Restricted to a lone `Url` value: gradients (which we |
| 4050 | * render unmasked for now) and multi-layer / keyword values are left |
| 4051 | * alone so a merely-unsupported mask never hides content. |
| 4052 | */ |
| 4053 | private function maskHidesElement(Box $box): bool |
| 4054 | { |
| 4055 | return $box->style->get('mask-image') instanceof \Phpdftk\Css\Value\Url; |
| 4056 | } |
| 4057 | |
| 4058 | /** |
| 4059 | * CSS Masking 1 §4 — resolve a `mask-image: <linear-gradient>` to the |
| 4060 | * Luminosity soft-mask ExtGState name that masks the box (and its |
| 4061 | * subtree) by the gradient, or null when the mask isn't a supported |
| 4062 | * single translucent linear gradient in the default `match-source` |
| 4063 | * (alpha) mode. |
| 4064 | * |
| 4065 | * `match-source` on a CSS `<image>` (a gradient, not an SVG `<mask>`) |
| 4066 | * resolves to `alpha`, so the mask value is the gradient's alpha |
| 4067 | * channel — exactly the DeviceGray alpha shading the background path |
| 4068 | * builds ({@see addLinearAlphaShading()}). The gradient is laid out |
| 4069 | * over the box's border box (the default mask-origin / mask-clip), |
| 4070 | * at its default size (auto → fills the box), so the geometry mirrors |
| 4071 | * a background gradient painted over that box. |
| 4072 | * |
| 4073 | * Bails (returns null → box paints unmasked) for anything outside this |
| 4074 | * narrow case — multi-layer masks, non-linear gradients, explicit |
| 4075 | * `luminance` mode, or any non-default mask geometry longhand — so an |
| 4076 | * unsupported mask never silently hides content. |
| 4077 | */ |
| 4078 | /** |
| 4079 | * CSS Masking 1 §4 — resolve a `mask-image: url(<image>)` to a soft-mask |
| 4080 | * ExtGState name that masks the box by the image's alpha (`match-source` |
| 4081 | * / `alpha`) or luminance (`mask-mode: luminance`). Increment 1 handles a |
| 4082 | * single url() layer under the DEFAULT mask box model (border-box |
| 4083 | * origin/clip, position 0 0, size auto, repeat) drawn to fill the border |
| 4084 | * box; non-default geometry / multi-layer / url(#id) return null (the |
| 4085 | * caller falls back, so the box paints unmasked or blank as before). |
| 4086 | * Returns null when not applicable so the gradient builder can try next. |
| 4087 | */ |
| 4088 | private function buildBoxImageMaskGsName(Box $box, ContentStream $stream): ?string |
| 4089 | { |
| 4090 | if ($this->writer === null || $this->page === null) { |
| 4091 | return null; |
| 4092 | } |
| 4093 | $maskImage = $box->style->get('mask-image'); |
| 4094 | if (!$maskImage instanceof \Phpdftk\Css\Value\Url) { |
| 4095 | return null; |
| 4096 | } |
| 4097 | // In-document SVG references (`url(#mask)`) need element resolution — |
| 4098 | // a later increment; only external image URLs here. |
| 4099 | $src = $maskImage->url; |
| 4100 | if (str_starts_with(ltrim($src), '#')) { |
| 4101 | return null; |
| 4102 | } |
| 4103 | // Multi-layer mask compositing beyond a single `add` layer isn't |
| 4104 | // modeled yet. |
| 4105 | $composite = $box->style->get('mask-composite'); |
| 4106 | if ($composite !== null && $composite->toCss() !== 'add') { |
| 4107 | return null; |
| 4108 | } |
| 4109 | // CSS Masking 1 §3.3 — `match-source` on an image (and explicit |
| 4110 | // `alpha`) uses the image's ALPHA; explicit `luminance` uses its |
| 4111 | // LUMINOSITY. (SVG `<mask>` elements default to luminance, but those |
| 4112 | // are url(#id) references handled later.) |
| 4113 | $subtype = 'Alpha'; |
| 4114 | $maskMode = $box->style->get('mask-mode'); |
| 4115 | if ($maskMode instanceof \Phpdftk\Css\Value\Keyword |
| 4116 | && strtolower($maskMode->name) === 'luminance' |
| 4117 | ) { |
| 4118 | $subtype = 'Luminosity'; |
| 4119 | } |
| 4120 | // CSS Masking 1 §4 — resolve the mask box model, reusing the |
| 4121 | // background origin/clip/size/position/repeat machinery. mask-origin |
| 4122 | // is the positioning area; mask-clip is the painted (group) region. |
| 4123 | $origin = $this->backgroundOriginRect($box, $this->resolveMaskOrigin($box)); |
| 4124 | $clipName = $this->resolveMaskClip($box); |
| 4125 | if ($clipName === 'no-clip') { |
| 4126 | $clipX = 0.0; |
| 4127 | $clipTop = 0.0; |
| 4128 | $clipW = $this->pageWidth; |
| 4129 | $clipH = $this->pageHeight; |
| 4130 | } else { |
| 4131 | [$clipX, $clipTop, $clipW, $clipH] = $this->clipReferenceBox($box->geometry, $clipName); |
| 4132 | } |
| 4133 | if ($clipW <= 0.0 || $clipH <= 0.0) { |
| 4134 | return null; |
| 4135 | } |
| 4136 | $svgDoc = null; |
| 4137 | $imgName = null; |
| 4138 | $imgRef = null; |
| 4139 | if ($this->isSvgSrc($src)) { |
| 4140 | $svgDoc = $this->loadSvgDocument($src); |
| 4141 | if ($svgDoc === null) { |
| 4142 | return null; |
| 4143 | } |
| 4144 | } else { |
| 4145 | $resolved = $this->resolveImageSrc($src); |
| 4146 | if ($resolved === null) { |
| 4147 | return null; |
| 4148 | } |
| 4149 | try { |
| 4150 | $imgName = $this->writer->addImage($resolved, $this->page); |
| 4151 | } catch (\Throwable) { |
| 4152 | return null; |
| 4153 | } |
| 4154 | $imgRef = $this->page->corePage()->resources->xObject[$imgName] ?? null; |
| 4155 | if ($imgRef === null) { |
| 4156 | return null; |
| 4157 | } |
| 4158 | } |
| 4159 | // Final paint size (mask-size) then position (mask-position) within |
| 4160 | // the positioning area. |
| 4161 | $paint = $this->resolveBackgroundSize( |
| 4162 | $box->style->get('mask-size'), |
| 4163 | $src, |
| 4164 | $origin['width'], |
| 4165 | $origin['height'], |
| 4166 | ); |
| 4167 | $maskPos = $box->style->get('mask-position'); |
| 4168 | if ($maskPos !== null) { |
| 4169 | $pos = $this->resolveBackgroundPosition( |
| 4170 | $maskPos, |
| 4171 | $paint['w'], |
| 4172 | $paint['h'], |
| 4173 | $origin['width'], |
| 4174 | $origin['height'], |
| 4175 | ); |
| 4176 | $paint['offsetX'] = $pos['offsetX']; |
| 4177 | $paint['offsetY'] = $pos['offsetY']; |
| 4178 | } |
| 4179 | $maskRepeat = $box->style->get('mask-repeat'); |
| 4180 | $clipPdfY = $this->pageHeight - $clipTop - $clipH; |
| 4181 | try { |
| 4182 | $doc = \Phpdftk\Pdf\Writer\PdfDoc::wrap($this->writer); |
| 4183 | $group = $doc->createTransparencyGroup( |
| 4184 | new \Phpdftk\Geometry\Rectangle($clipX, $clipPdfY, $clipW, $clipH), |
| 4185 | function ( |
| 4186 | ContentStream $cs, |
| 4187 | \Phpdftk\Pdf\Core\Content\Resources $res, |
| 4188 | ) use ($svgDoc, $imgName, $imgRef, $clipX, $clipTop, $clipW, $clipH, $paint, $maskRepeat, $origin): void { |
| 4189 | $register = ($imgName !== null && $imgRef !== null) |
| 4190 | ? function (string $n) use ($res, $imgRef): void { |
| 4191 | $res->addXObject($n, $imgRef); |
| 4192 | } |
| 4193 | : null; |
| 4194 | $this->drawImageTilesInto( |
| 4195 | $cs, |
| 4196 | $svgDoc, |
| 4197 | $imgName, |
| 4198 | $clipX, |
| 4199 | $clipTop, |
| 4200 | $clipW, |
| 4201 | $clipH, |
| 4202 | $paint, |
| 4203 | $maskRepeat, |
| 4204 | $origin['x'], |
| 4205 | $origin['top'], |
| 4206 | $origin['width'], |
| 4207 | $origin['height'], |
| 4208 | $register, |
| 4209 | ); |
| 4210 | }, |
| 4211 | ); |
| 4212 | return $this->page->ensureSoftMaskState($group, $subtype); |
| 4213 | } catch (\Throwable) { |
| 4214 | return null; |
| 4215 | } |
| 4216 | } |
| 4217 | |
| 4218 | /** |
| 4219 | * CSS Masking 1 §4.1 — `mask-image: url(#id)` referencing an SVG |
| 4220 | * `<mask>` ELEMENT (as opposed to an image). The mask element brings |
| 4221 | * its own geometry — `maskUnits` / `maskContentUnits` / `x` / `y` / |
| 4222 | * `width` / `height` — so the CSS mask box model (`mask-origin`, |
| 4223 | * `mask-size`, `mask-position`, `mask-repeat`, `mask-clip`) does not |
| 4224 | * apply; only `mask-mode` still speaks, overriding the element's |
| 4225 | * `mask-type`. |
| 4226 | * |
| 4227 | * The mask's children are resolved in the referencing element's own |
| 4228 | * user coordinate system — origin at the top-left of its border box, |
| 4229 | * y running down — which is the same frame `clip-path: url(#id)` |
| 4230 | * uses, and the element's bounding box for `objectBoundingBox` units |
| 4231 | * is that border box. |
| 4232 | * |
| 4233 | * Returns null when the reference does not resolve to a `<mask>`, so |
| 4234 | * the image / gradient builders get their turn. |
| 4235 | */ |
| 4236 | private function buildBoxSvgMaskGsName(Box $box): ?string |
| 4237 | { |
| 4238 | if ($this->writer === null || $this->page === null) { |
| 4239 | return null; |
| 4240 | } |
| 4241 | $maskImage = $box->style->get('mask-image'); |
| 4242 | if (!$maskImage instanceof \Phpdftk\Css\Value\Url) { |
| 4243 | return null; |
| 4244 | } |
| 4245 | $url = trim($maskImage->url); |
| 4246 | $hash = strpos($url, '#'); |
| 4247 | if ($hash === false) { |
| 4248 | return null; |
| 4249 | } |
| 4250 | $id = substr($url, $hash + 1); |
| 4251 | if ($id === '') { |
| 4252 | return null; |
| 4253 | } |
| 4254 | $svgDoc = $hash === 0 |
| 4255 | ? $this->hostSvgDocumentFor($box, $id) |
| 4256 | : $this->loadSvgDocument(substr($url, 0, $hash)); |
| 4257 | if ($svgDoc === null) { |
| 4258 | return null; |
| 4259 | } |
| 4260 | $mask = $svgDoc->findById($id); |
| 4261 | if (!$mask instanceof \Phpdftk\Svg\Mask) { |
| 4262 | return null; |
| 4263 | } |
| 4264 | [$bx, $by, $bw, $bh] = $this->clipReferenceBox($box->geometry, 'border-box'); |
| 4265 | if ($bw <= 0.0 || $bh <= 0.0) { |
| 4266 | return null; |
| 4267 | } |
| 4268 | // CSS Masking 1 §3.3 — `mask-mode` overrides the mask element's |
| 4269 | // own `mask-type`; `match-source` defers to it. |
| 4270 | $subtype = null; |
| 4271 | $maskMode = $box->style->get('mask-mode'); |
| 4272 | if ($maskMode instanceof \Phpdftk\Css\Value\Keyword) { |
| 4273 | $subtype = match (strtolower($maskMode->name)) { |
| 4274 | 'alpha' => 'Alpha', |
| 4275 | 'luminance' => 'Luminosity', |
| 4276 | default => null, |
| 4277 | }; |
| 4278 | } |
| 4279 | try { |
| 4280 | return $this->clipTranslator()->registerMaskState( |
| 4281 | $svgDoc, |
| 4282 | $mask, |
| 4283 | $this->page, |
| 4284 | $this->writer, |
| 4285 | ['minX' => 0.0, 'minY' => 0.0, 'width' => $bw, 'height' => $bh], |
| 4286 | [1.0, 0.0, 0.0, -1.0, $bx, $this->pageHeight - $by], |
| 4287 | $subtype, |
| 4288 | ); |
| 4289 | } catch (\Throwable) { |
| 4290 | return null; |
| 4291 | } |
| 4292 | } |
| 4293 | |
| 4294 | /** |
| 4295 | * CSS Masking 1 §4.5 — `mask-origin` positioning box. Initial `border-box` |
| 4296 | * (unlike `background-origin`'s `padding-box`). |
| 4297 | */ |
| 4298 | private function resolveMaskOrigin(Box $box): string |
| 4299 | { |
| 4300 | $v = $box->style->get('mask-origin'); |
| 4301 | if ($v instanceof \Phpdftk\Css\Value\Keyword) { |
| 4302 | $n = strtolower($v->name); |
| 4303 | if (in_array($n, ['content-box', 'padding-box', 'border-box'], true)) { |
| 4304 | return $n; |
| 4305 | } |
| 4306 | } |
| 4307 | return 'border-box'; |
| 4308 | } |
| 4309 | |
| 4310 | /** |
| 4311 | * CSS Masking 1 §4.6 — `mask-clip` painting box (initial `border-box`). |
| 4312 | * `no-clip` leaves the mask unclipped; SVG visual boxes (fill/stroke/ |
| 4313 | * view-box) map to the nearest supported CSS box. |
| 4314 | */ |
| 4315 | private function resolveMaskClip(Box $box): string |
| 4316 | { |
| 4317 | $v = $box->style->get('mask-clip'); |
| 4318 | if ($v instanceof \Phpdftk\Css\Value\Keyword) { |
| 4319 | $n = strtolower($v->name); |
| 4320 | if ($n === 'no-clip') { |
| 4321 | return 'no-clip'; |
| 4322 | } |
| 4323 | if (in_array($n, ['content-box', 'padding-box', 'border-box'], true)) { |
| 4324 | return $n; |
| 4325 | } |
| 4326 | } |
| 4327 | return 'border-box'; |
| 4328 | } |
| 4329 | |
| 4330 | private function buildBoxGradientMaskGsName(Box $box, ContentStream $stream): ?string |
| 4331 | { |
| 4332 | if ($this->writer === null || $this->page === null) { |
| 4333 | return null; |
| 4334 | } |
| 4335 | $maskImage = $box->style->get('mask-image'); |
| 4336 | if (!$maskImage instanceof \Phpdftk\Css\Value\LinearGradient) { |
| 4337 | return null; |
| 4338 | } |
| 4339 | // Only the default `match-source` (→ alpha for a CSS image) or an |
| 4340 | // explicit `alpha` mode maps cleanly to the alpha shading. Any |
| 4341 | // other mode (`luminance`) would need a different mask value. |
| 4342 | $maskMode = $box->style->get('mask-mode'); |
| 4343 | if ($maskMode instanceof \Phpdftk\Css\Value\Keyword) { |
| 4344 | $mode = strtolower($maskMode->name); |
| 4345 | if ($mode !== 'match-source' && $mode !== 'alpha') { |
| 4346 | return null; |
| 4347 | } |
| 4348 | } |
| 4349 | // Bail on any non-default mask geometry — those change where / how |
| 4350 | // the gradient tiles and we only model the full-border-box case. |
| 4351 | // The longhands are registered with initial values, so compare the |
| 4352 | // computed value's serialisation against the CSS initial rather |
| 4353 | // than testing for absence. |
| 4354 | $defaults = [ |
| 4355 | 'mask-repeat' => 'repeat', |
| 4356 | 'mask-size' => 'auto', |
| 4357 | 'mask-position' => '0% 0%', |
| 4358 | 'mask-clip' => 'border-box', |
| 4359 | 'mask-origin' => 'border-box', |
| 4360 | 'mask-composite' => 'add', |
| 4361 | ]; |
| 4362 | foreach ($defaults as $prop => $initial) { |
| 4363 | $value = $box->style->get($prop); |
| 4364 | if ($value !== null && $value->toCss() !== $initial) { |
| 4365 | return null; |
| 4366 | } |
| 4367 | } |
| 4368 | // A gradient with no translucent stop masks nothing out (mask is |
| 4369 | // fully opaque) — skip the soft mask entirely (fast path, no-op). |
| 4370 | if (!$this->gradientHasAlpha($maskImage->stops)) { |
| 4371 | return null; |
| 4372 | } |
| 4373 | [$bx, $by, $bw, $bh] = $this->clipReferenceBox($box->geometry, 'border-box'); |
| 4374 | if ($bw <= 0.0 || $bh <= 0.0) { |
| 4375 | return null; |
| 4376 | } |
| 4377 | $tilePdfY = $this->pageHeight - $by - $bh; |
| 4378 | [$startX, $startY, $endX, $endY, $lineLength] = |
| 4379 | $this->linearGradientLine($maskImage->angleDeg, $bx, $tilePdfY, $bw, $bh); |
| 4380 | $stopList = $this->resolveGradientStops($maskImage->stops, $lineLength); |
| 4381 | if (count($stopList) < 2) { |
| 4382 | return null; |
| 4383 | } |
| 4384 | $alphaStops = $this->alphaStopsFrom($stopList); |
| 4385 | return $this->buildGradientAlphaMaskState( |
| 4386 | \Phpdftk\Pdf\Writer\PdfDoc::wrap($this->writer), |
| 4387 | fn(\Phpdftk\Pdf\Writer\PdfDoc $d): int => $d->addLinearAlphaShading( |
| 4388 | new \Phpdftk\Geometry\Point($startX, $startY), |
| 4389 | new \Phpdftk\Geometry\Point($endX, $endY), |
| 4390 | $alphaStops, |
| 4391 | )->objectNumber, |
| 4392 | $bx, |
| 4393 | $tilePdfY, |
| 4394 | $bw, |
| 4395 | $bh, |
| 4396 | ); |
| 4397 | } |
| 4398 | |
| 4399 | /** |
| 4400 | * Compute a CSS linear-gradient line over a tile: its start / end |
| 4401 | * points (PDF coordinates) and full length. `angleDeg` follows the |
| 4402 | * CSS convention (0° points up, increases clockwise); the endpoints |
| 4403 | * land on the tile boundary corners per CSS Images 3 §3.1. Shared by |
| 4404 | * the background gradient painter and the gradient mask builder. |
| 4405 | * |
| 4406 | * @return array{float, float, float, float, float} |
| 4407 | * [startX, startY, endX, endY, lineLength] |
| 4408 | */ |
| 4409 | private function linearGradientLine( |
| 4410 | float $angleDeg, |
| 4411 | float $tileX, |
| 4412 | float $tilePdfY, |
| 4413 | float $tileWidth, |
| 4414 | float $tileHeight, |
| 4415 | ): array { |
| 4416 | $angle = fmod($angleDeg, 360.0); |
| 4417 | if ($angle < 0.0) { |
| 4418 | $angle += 360.0; |
| 4419 | } |
| 4420 | $rad = deg2rad($angle); |
| 4421 | $cx = $tileX + $tileWidth / 2; |
| 4422 | $cy = $tilePdfY + $tileHeight / 2; |
| 4423 | $sin = sin($rad); |
| 4424 | $cos = cos($rad); |
| 4425 | $halfLen = (abs($tileWidth * $sin) + abs($tileHeight * $cos)) / 2; |
| 4426 | return [ |
| 4427 | $cx - $sin * $halfLen, |
| 4428 | $cy - $cos * $halfLen, |
| 4429 | $cx + $sin * $halfLen, |
| 4430 | $cy + $cos * $halfLen, |
| 4431 | $halfLen * 2, |
| 4432 | ]; |
| 4433 | } |
| 4434 | |
| 4435 | private function applyClipPath(Box $box, ContentStream $stream): bool |
| 4436 | { |
| 4437 | $shape = $box->style->get('clip-path'); |
| 4438 | // CSS Masking 1 §6.1 — `clip-path: <clip-source>` references a |
| 4439 | // `<clipPath>` element. A `<url>` never combines with a |
| 4440 | // `<geometry-box>`, so dispatch before the ValueList unwrap below. |
| 4441 | if ($shape instanceof \Phpdftk\Css\Value\Url) { |
| 4442 | return $this->applyReferencedClipPath($box, $shape->url, $stream); |
| 4443 | } |
| 4444 | // CSS Masking 1 §6 — `clip-path: <basic-shape> || <geometry-box>`. |
| 4445 | // When a reference box is present the value parses as a ValueList |
| 4446 | // of [shape, geometry-box keyword] (in either order); unwrap it so |
| 4447 | // the `instanceof` shape dispatch below still fires, and resolve |
| 4448 | // the shape against the named box instead of the default border box. |
| 4449 | $geometryBoxes = [ |
| 4450 | 'content-box', 'padding-box', 'border-box', 'margin-box', |
| 4451 | 'fill-box', 'stroke-box', 'view-box', |
| 4452 | ]; |
| 4453 | $refBox = 'border-box'; |
| 4454 | $bareBox = false; |
| 4455 | if ($shape instanceof \Phpdftk\Css\Value\ValueList) { |
| 4456 | $extractedShape = null; |
| 4457 | foreach ($shape->values as $part) { |
| 4458 | if ($part instanceof \Phpdftk\Css\Value\BasicShape) { |
| 4459 | $extractedShape = $part; |
| 4460 | } elseif ($part instanceof \Phpdftk\Css\Value\Keyword) { |
| 4461 | $refBox = strtolower($part->name); |
| 4462 | } |
| 4463 | } |
| 4464 | $shape = $extractedShape; |
| 4465 | // A bare `<geometry-box>` with no shape clips to that box's edge. |
| 4466 | $bareBox = $extractedShape === null; |
| 4467 | } elseif ($shape instanceof \Phpdftk\Css\Value\Keyword |
| 4468 | && in_array(strtolower($shape->name), $geometryBoxes, true) |
| 4469 | ) { |
| 4470 | // `clip-path: <geometry-box>` with no shape — clip to that box. |
| 4471 | $refBox = strtolower($shape->name); |
| 4472 | $bareBox = true; |
| 4473 | } |
| 4474 | $g = $box->geometry; |
| 4475 | [$bx, $by, $bw, $bh] = $this->clipReferenceBox($g, $refBox); |
| 4476 | if ($bw <= 0.0 || $bh <= 0.0) { |
| 4477 | return false; |
| 4478 | } |
| 4479 | $ph = $this->pageHeight; |
| 4480 | if ($bareBox) { |
| 4481 | // CSS Masking 1 §6 — `clip-path: <geometry-box>` clips to that |
| 4482 | // box's edge. When the element has border-radius the clip follows |
| 4483 | // the (reference-box-reduced) rounded corners (CSS Backgrounds |
| 4484 | // 3 §5.3); otherwise a plain rectangle. |
| 4485 | $stream->saveGraphicsState(); |
| 4486 | $g = $box->geometry; |
| 4487 | $borderBoxW = $g->borderLeft + $g->paddingLeft + $g->width + $g->paddingRight + $g->borderRight; |
| 4488 | $borderBoxH = $g->borderTop + $g->paddingTop + $g->height + $g->paddingBottom + $g->borderBottom; |
| 4489 | $radii = $this->reduceRadiiToBox( |
| 4490 | $this->borderRadiiXY($box, $borderBoxW, $borderBoxH), |
| 4491 | $refBox, |
| 4492 | $g, |
| 4493 | ); |
| 4494 | if ($this->radiiAnyPositive($radii)) { |
| 4495 | $this->buildRoundedRectPath($stream, $bx, $by, $bw, $bh, $radii, $this->cornerShapes($box)); |
| 4496 | } else { |
| 4497 | $stream->rectangle($bx, $ph - $by - $bh, $bw, $bh); |
| 4498 | } |
| 4499 | $stream->clip(); |
| 4500 | $stream->endPath(); |
| 4501 | return true; |
| 4502 | } |
| 4503 | // CSS Shapes 1 §3 — resolve the shape's outline against the |
| 4504 | // reference box in CSS coordinates (y down), then emit it with y |
| 4505 | // flipped into PDF space. The resolver is shared with the SVG |
| 4506 | // translator's `clip-path` so both halves of the engine agree on |
| 4507 | // the geometry. |
| 4508 | $outline = \Phpdftk\Css\Shape\BasicShapePath::build($shape, $bx, $by, $bw, $bh); |
| 4509 | if ($outline === null) { |
| 4510 | return false; |
| 4511 | } |
| 4512 | $stream->saveGraphicsState(); |
| 4513 | foreach ($outline['commands'] as $command) { |
| 4514 | switch ($command[0]) { |
| 4515 | case 'M': |
| 4516 | $stream->moveTo((float) $command[1], $ph - (float) $command[2]); |
| 4517 | break; |
| 4518 | case 'L': |
| 4519 | $stream->lineTo((float) $command[1], $ph - (float) $command[2]); |
| 4520 | break; |
| 4521 | case 'C': |
| 4522 | $stream->curveTo( |
| 4523 | (float) $command[1], |
| 4524 | $ph - (float) $command[2], |
| 4525 | (float) $command[3], |
| 4526 | $ph - (float) $command[4], |
| 4527 | (float) $command[5], |
| 4528 | $ph - (float) $command[6], |
| 4529 | ); |
| 4530 | break; |
| 4531 | default: |
| 4532 | $stream->closePath(); |
| 4533 | break; |
| 4534 | } |
| 4535 | } |
| 4536 | if ($outline['fillRule'] === 'evenodd') { |
| 4537 | $stream->clipEvenOdd(); |
| 4538 | } else { |
| 4539 | $stream->clip(); |
| 4540 | } |
| 4541 | $stream->endPath(); |
| 4542 | return true; |
| 4543 | } |
| 4544 | |
| 4545 | /** |
| 4546 | * CSS Masking 1 §6.1 — `clip-path: url(#id)` clips the box (and its |
| 4547 | * subtree) to the geometry of the referenced `<clipPath>` element. |
| 4548 | * |
| 4549 | * The clipPath's children are resolved in the referencing element's |
| 4550 | * own user coordinate system, whose origin is the top-left of its |
| 4551 | * BORDER box with y running down (CSS Masking 1 §6.1, "the user |
| 4552 | * coordinate system in place at the time the clipPath is |
| 4553 | * referenced"). We install exactly that mapping as a `cm`, let the |
| 4554 | * SVG translator build the region, then concatenate the inverse: the |
| 4555 | * clip established by `W` already lives in device space, so undoing |
| 4556 | * the CTM leaves the region in force while the caller keeps painting |
| 4557 | * in page coordinates. (Popping with `Q` instead would discard the |
| 4558 | * clip along with the matrix.) |
| 4559 | * |
| 4560 | * `clipPathUnits="objectBoundingBox"` measures the children against |
| 4561 | * the element's bounding box, which for a non-SVG element is that |
| 4562 | * same border box. |
| 4563 | * |
| 4564 | * Fragment-only URLs are always document-local (CSS Values 4 §4.5), |
| 4565 | * so a `<base href>` never redirects them; a URL with a path is |
| 4566 | * loaded as an external SVG resource. Returns false — no clip, the |
| 4567 | * element paints whole — when the reference does not resolve to a |
| 4568 | * `<clipPath>`. |
| 4569 | */ |
| 4570 | private function applyReferencedClipPath(Box $box, string $rawUrl, ContentStream $stream): bool |
| 4571 | { |
| 4572 | $url = trim($rawUrl); |
| 4573 | $hash = strpos($url, '#'); |
| 4574 | if ($hash === false) { |
| 4575 | return false; |
| 4576 | } |
| 4577 | $id = substr($url, $hash + 1); |
| 4578 | if ($id === '') { |
| 4579 | return false; |
| 4580 | } |
| 4581 | $svgDoc = $hash === 0 |
| 4582 | ? $this->hostSvgDocumentFor($box, $id) |
| 4583 | : $this->loadSvgDocument(substr($url, 0, $hash)); |
| 4584 | if ($svgDoc === null) { |
| 4585 | return false; |
| 4586 | } |
| 4587 | $clipPath = $svgDoc->findById($id); |
| 4588 | if (!$clipPath instanceof \Phpdftk\Svg\ClipPath) { |
| 4589 | return false; |
| 4590 | } |
| 4591 | [$bx, $by, $bw, $bh] = $this->clipReferenceBox($box->geometry, 'border-box'); |
| 4592 | if ($bw <= 0.0 || $bh <= 0.0) { |
| 4593 | return false; |
| 4594 | } |
| 4595 | $ph = $this->pageHeight; |
| 4596 | $stream->saveGraphicsState(); |
| 4597 | $stream->concatMatrix(1.0, 0.0, 0.0, -1.0, $bx, $ph - $by); |
| 4598 | try { |
| 4599 | $this->clipTranslator()->emitClipPathRegion( |
| 4600 | $svgDoc, |
| 4601 | $clipPath, |
| 4602 | $stream, |
| 4603 | // SVG 2 §10.3 — percentage lengths on the clipPath's |
| 4604 | // children resolve against the viewport. The referencing |
| 4605 | // element is not inside any SVG viewport, so that is the |
| 4606 | // initial viewport: the page box. |
| 4607 | ['w' => $this->pageWidth, 'h' => $ph], |
| 4608 | [0.0, 0.0, $bw, $bh], |
| 4609 | ); |
| 4610 | } catch (\Throwable) { |
| 4611 | $stream->restoreGraphicsState(); |
| 4612 | return false; |
| 4613 | } |
| 4614 | $stream->concatMatrix(1.0, 0.0, 0.0, -1.0, -$bx, $ph - $by); |
| 4615 | return true; |
| 4616 | } |
| 4617 | |
| 4618 | /** |
| 4619 | * Resolve a document-local `#id` clip / mask reference to the parsed |
| 4620 | * `SvgDocument` for the inline `<svg>` that hosts it. |
| 4621 | * |
| 4622 | * The id is looked up in the HTML DOM (so an `<svg>` anywhere in the |
| 4623 | * document can serve a `<clipPath>` to any element), then the |
| 4624 | * OUTERMOST `<svg>` ancestor of the hit is adapted — that is the |
| 4625 | * subtree `InlineSvgAdapter` knows how to turn into typed SVG |
| 4626 | * elements, and its cache makes repeat lookups free. |
| 4627 | */ |
| 4628 | private function hostSvgDocumentFor(Box $box, string $id): ?\Phpdftk\Svg\SvgDocument |
| 4629 | { |
| 4630 | $element = $box->element; |
| 4631 | if ($element === null) { |
| 4632 | return null; |
| 4633 | } |
| 4634 | $target = $element->ownerDocument->getElementById($id); |
| 4635 | if ($target === null) { |
| 4636 | return null; |
| 4637 | } |
| 4638 | $svgRoot = null; |
| 4639 | for ($n = $target; $n !== null; $n = $n->parentNode) { |
| 4640 | if ($n instanceof \Phpdftk\Html\Dom\Element |
| 4641 | && \Phpdftk\HtmlToPdf\Box\BoxGenerator::foreignContentKind($n) === 'svg' |
| 4642 | ) { |
| 4643 | $svgRoot = $n; |
| 4644 | } |
| 4645 | } |
| 4646 | if ($svgRoot === null) { |
| 4647 | return null; |
| 4648 | } |
| 4649 | try { |
| 4650 | return $this->inlineSvgAdapter()->adapt($svgRoot); |
| 4651 | } catch (\Throwable) { |
| 4652 | return null; |
| 4653 | } |
| 4654 | } |
| 4655 | |
| 4656 | /** |
| 4657 | * Lazily-built translator used ONLY to emit `<clipPath>` / `<mask>` |
| 4658 | * geometry for document-local CSS references. Kept separate from |
| 4659 | * {@see svgRenderer}'s translator so a clip emitted mid-paint can |
| 4660 | * never disturb the state of an inline-SVG paint in progress. |
| 4661 | */ |
| 4662 | private function clipTranslator(): \Phpdftk\SvgToPdf\Translator |
| 4663 | { |
| 4664 | if ($this->clipTranslator === null) { |
| 4665 | $this->clipTranslator = new \Phpdftk\SvgToPdf\Translator(); |
| 4666 | } |
| 4667 | return $this->clipTranslator; |
| 4668 | } |
| 4669 | |
| 4670 | /** |
| 4671 | * CSS Masking 1 §6 / CSS Box 3 — resolve a `<geometry-box>` keyword to |
| 4672 | * the box rectangle `[left, top, width, height]` (top-left origin, y |
| 4673 | * down, CSS px) a clip shape is measured against. `$g->x` / `$g->y` are |
| 4674 | * the CONTENT box origin; padding / border / margin extend outward. |
| 4675 | * The SVG-only boxes map to their closest CSS box for HTML elements |
| 4676 | * (fill-box → content, stroke-box / view-box → border), per the spec's |
| 4677 | * fallback for elements without an SVG geometry. |
| 4678 | * |
| 4679 | * @return array{0: float, 1: float, 2: float, 3: float} |
| 4680 | */ |
| 4681 | private function clipReferenceBox(\Phpdftk\HtmlToPdf\Layout\BoxGeometry $g, string $box): array |
| 4682 | { |
| 4683 | return match ($box) { |
| 4684 | 'content-box', 'fill-box' => [ |
| 4685 | $g->x, |
| 4686 | $g->y, |
| 4687 | $g->width, |
| 4688 | $g->height, |
| 4689 | ], |
| 4690 | 'padding-box' => [ |
| 4691 | $g->x - $g->paddingLeft, |
| 4692 | $g->y - $g->paddingTop, |
| 4693 | $g->paddingLeft + $g->width + $g->paddingRight, |
| 4694 | $g->paddingTop + $g->height + $g->paddingBottom, |
| 4695 | ], |
| 4696 | 'margin-box' => [ |
| 4697 | $g->x - $g->paddingLeft - $g->borderLeft - $g->marginLeft, |
| 4698 | $g->y - $g->paddingTop - $g->borderTop - $g->marginTop, |
| 4699 | $g->marginLeft + $g->borderLeft + $g->paddingLeft + $g->width |
| 4700 | + $g->paddingRight + $g->borderRight + $g->marginRight, |
| 4701 | $g->marginTop + $g->borderTop + $g->paddingTop + $g->height |
| 4702 | + $g->paddingBottom + $g->borderBottom + $g->marginBottom, |
| 4703 | ], |
| 4704 | // border-box (the clip-path default), stroke-box, view-box. |
| 4705 | default => [ |
| 4706 | $g->x - $g->paddingLeft - $g->borderLeft, |
| 4707 | $g->y - $g->paddingTop - $g->borderTop, |
| 4708 | $g->borderLeft + $g->paddingLeft + $g->width + $g->paddingRight + $g->borderRight, |
| 4709 | $g->borderTop + $g->paddingTop + $g->height + $g->paddingBottom + $g->borderBottom, |
| 4710 | ], |
| 4711 | }; |
| 4712 | } |
| 4713 | |
| 4714 | /** |
| 4715 | * One `clip` rect edge → px. `auto` returns `$autoValue` (the border |
| 4716 | * edge); a `<length>` / `0` returns its value. |
| 4717 | */ |
| 4718 | private function clipEdgePx(\Phpdftk\Css\Value\Value $value, float $autoValue): float |
| 4719 | { |
| 4720 | if ($value instanceof Keyword && strtolower($value->name) === 'auto') { |
| 4721 | return $autoValue; |
| 4722 | } |
| 4723 | if ($value instanceof \Phpdftk\Css\Value\Length) { |
| 4724 | return $value->value; |
| 4725 | } |
| 4726 | if ($value instanceof \Phpdftk\Css\Value\Integer |
| 4727 | || $value instanceof \Phpdftk\Css\Value\Number |
| 4728 | ) { |
| 4729 | return (float) $value->value; |
| 4730 | } |
| 4731 | return $autoValue; |
| 4732 | } |
| 4733 | |
| 4734 | /** |
| 4735 | * Return true when the box's cumulative `transform` rotates the |
| 4736 | * backface forward AND `backface-visibility: hidden` is set. |
| 4737 | * We walk the box's rotate functions, summing the (signed) X / |
| 4738 | * Y rotations; the backface is forward-facing when either total |
| 4739 | * exceeds 90° (mod 360°) on the canonical face. |
| 4740 | */ |
| 4741 | private function isBackfaceHidden(Box $box): bool |
| 4742 | { |
| 4743 | $visibility = $box->style->get('backface-visibility'); |
| 4744 | if (!$visibility instanceof Keyword |
| 4745 | || strtolower($visibility->name) !== 'hidden' |
| 4746 | ) { |
| 4747 | return false; |
| 4748 | } |
| 4749 | $transform = $box->style->get('transform'); |
| 4750 | if (!$transform instanceof \Phpdftk\Css\Value\Transform) { |
| 4751 | return false; |
| 4752 | } |
| 4753 | $cumX = 0.0; |
| 4754 | $cumY = 0.0; |
| 4755 | foreach ($transform->functions as $fn) { |
| 4756 | if (!$fn instanceof \Phpdftk\Css\Value\RotateTransform) { |
| 4757 | continue; |
| 4758 | } |
| 4759 | $axisLen = sqrt($fn->ax * $fn->ax + $fn->ay * $fn->ay + $fn->az * $fn->az); |
| 4760 | if ($axisLen <= 0.0) { |
| 4761 | continue; |
| 4762 | } |
| 4763 | // Distribute the rotation across X / Y by axis component. |
| 4764 | $cumX += $fn->angleDeg * ($fn->ax / $axisLen); |
| 4765 | $cumY += $fn->angleDeg * ($fn->ay / $axisLen); |
| 4766 | } |
| 4767 | $isFlippedX = cos(deg2rad($cumX)) < 0; |
| 4768 | $isFlippedY = cos(deg2rad($cumY)) < 0; |
| 4769 | return $isFlippedX || $isFlippedY; |
| 4770 | } |
| 4771 | |
| 4772 | private function isVisibilityHidden(Box $box): bool |
| 4773 | { |
| 4774 | $value = $box->style->get('visibility'); |
| 4775 | return $value instanceof Keyword |
| 4776 | && in_array(strtolower($value->name), ['hidden', 'collapse'], true); |
| 4777 | } |
| 4778 | |
| 4779 | /** |
| 4780 | * Paint CSS Backgrounds 3 §6 `box-shadow`. Phase-1 implementation: |
| 4781 | * draws a hard-edged shadow rect (no blur — blur needs Filter Effects 1 |
| 4782 | * which is Phase 2). Honours `<offset-x>`, `<offset-y>`, optional |
| 4783 | * `<spread-radius>`, and `<color>` (defaults to cascaded `color`). |
| 4784 | * Inset shadows are not yet emitted (would clip inward). |
| 4785 | * |
| 4786 | * Multi-shadow comma lists are read; each shadow paints in reverse |
| 4787 | * order so the first listed sits on top — matching CSS stacking. |
| 4788 | */ |
| 4789 | private function paintBoxShadow(Box $box, ContentStream $stream, bool $insetOnly): void |
| 4790 | { |
| 4791 | $value = $box->style->get('box-shadow'); |
| 4792 | if ($value === null |
| 4793 | || ($value instanceof Keyword && strtolower($value->name) === 'none') |
| 4794 | ) { |
| 4795 | return; |
| 4796 | } |
| 4797 | $shadows = $this->collectShadowLayers($value); |
| 4798 | if ($shadows === []) { |
| 4799 | return; |
| 4800 | } |
| 4801 | $defaultColor = $box->style->get('color'); |
| 4802 | $textColor = $defaultColor instanceof Color ? $defaultColor : new Color(0, 0, 0, 1); |
| 4803 | $geo = $box->geometry; |
| 4804 | |
| 4805 | // Paint last shadow first so earlier-listed shadows sit on top. |
| 4806 | foreach (array_reverse($shadows) as $shadow) { |
| 4807 | if ($shadow['inset'] !== $insetOnly) { |
| 4808 | continue; |
| 4809 | } |
| 4810 | $color = $shadow['color'] ?? $textColor; |
| 4811 | // CSS Backgrounds 3 §6 — a fully-transparent shadow colour |
| 4812 | // contributes nothing visible; skip the paint so the |
| 4813 | // alpha=0 colour doesn't resolve through the DeviceRGB |
| 4814 | // `rg` operator (which has no alpha) and render as black. |
| 4815 | if ($color->a <= 0.0) { |
| 4816 | continue; |
| 4817 | } |
| 4818 | $spread = $shadow['spread']; |
| 4819 | if ($shadow['inset']) { |
| 4820 | $this->paintInsetShadow($geo, $shadow, $color, $stream); |
| 4821 | continue; |
| 4822 | } |
| 4823 | $x = $geo->x - $geo->paddingLeft - $geo->borderLeft + $shadow['offsetX'] - $spread; |
| 4824 | $top = $geo->y - $geo->paddingTop - $geo->borderTop + $shadow['offsetY'] - $spread; |
| 4825 | $width = $geo->paddingLeft + $geo->width + $geo->paddingRight |
| 4826 | + $geo->borderLeft + $geo->borderRight + 2 * $spread; |
| 4827 | $height = $geo->paddingTop + $geo->height + $geo->paddingBottom |
| 4828 | + $geo->borderTop + $geo->borderBottom + 2 * $spread; |
| 4829 | $this->emitRect($stream, $x, $top, $width, $height, fill: $color); |
| 4830 | } |
| 4831 | } |
| 4832 | |
| 4833 | /** |
| 4834 | * Paint an inset box-shadow per CSS Backgrounds 3 §6. The shadow |
| 4835 | * paints INSIDE the padding-box edge (not outside the border-box |
| 4836 | * like the default outset case). Offsets are inverted in effect: |
| 4837 | * a positive `offsetX` makes the shadow visible at the *left* |
| 4838 | * edge of the inside (the shadow "comes from" the +X direction). |
| 4839 | * Positive `spread` makes the visible inner shadow band thicker |
| 4840 | * by shrinking the unshaded inner rect. |
| 4841 | * |
| 4842 | * Implementation: paint the padding-box outer rect plus the |
| 4843 | * computed inner rect as two subpaths, then fill with the |
| 4844 | * even-odd rule (`f*`) so PDF leaves the inner rect transparent |
| 4845 | * and fills only the frame between them with the shadow colour. |
| 4846 | * |
| 4847 | * @param array{offsetX: float, offsetY: float, blur: float, spread: float, color: ?Color, inset: bool} $shadow |
| 4848 | */ |
| 4849 | private function paintInsetShadow(\Phpdftk\HtmlToPdf\Layout\BoxGeometry $geo, array $shadow, Color $color, ContentStream $stream): void |
| 4850 | { |
| 4851 | // Padding-box edge (one step inside the border edge). |
| 4852 | $padX = $geo->x - $geo->paddingLeft; |
| 4853 | $padTop = $geo->y - $geo->paddingTop; |
| 4854 | $padWidth = $geo->paddingLeft + $geo->width + $geo->paddingRight; |
| 4855 | $padHeight = $geo->paddingTop + $geo->height + $geo->paddingBottom; |
| 4856 | if ($padWidth <= 0.0 || $padHeight <= 0.0) { |
| 4857 | return; |
| 4858 | } |
| 4859 | $spread = $shadow['spread']; |
| 4860 | // Inner unshaded rect — inset from the padding-box by the |
| 4861 | // offset on the corresponding side, then further by spread on |
| 4862 | // every side. CSS 2 §6: a positive +X offset moves the shadow |
| 4863 | // toward +X (visible at the OPPOSITE edge — the left), so the |
| 4864 | // inner rect's left edge advances by offsetX. |
| 4865 | $innerX = $padX + max(0.0, $shadow['offsetX']) + $spread; |
| 4866 | $innerTop = $padTop + max(0.0, $shadow['offsetY']) + $spread; |
| 4867 | $innerRight = $padX + $padWidth + min(0.0, $shadow['offsetX']) - $spread; |
| 4868 | $innerBottom = $padTop + $padHeight + min(0.0, $shadow['offsetY']) - $spread; |
| 4869 | $innerWidth = $innerRight - $innerX; |
| 4870 | $innerHeight = $innerBottom - $innerTop; |
| 4871 | if ($innerWidth <= 0.0 || $innerHeight <= 0.0) { |
| 4872 | // Spread+offset consumes the whole padding box — fill it |
| 4873 | // solid with the shadow colour. |
| 4874 | $this->emitRect($stream, $padX, $padTop, $padWidth, $padHeight, fill: $color); |
| 4875 | return; |
| 4876 | } |
| 4877 | // PDF Y axis is inverted vs layout. Flip both rects. |
| 4878 | $padPdfY = $this->pageHeight - $padTop - $padHeight; |
| 4879 | $innerPdfY = $this->pageHeight - $innerTop - $innerHeight; |
| 4880 | $stream->saveGraphicsState(); |
| 4881 | $stream->setFillColorRGB($color->r, $color->g, $color->b); |
| 4882 | $stream->rectangle($padX, $padPdfY, $padWidth, $padHeight); |
| 4883 | $stream->rectangle($innerX, $innerPdfY, $innerWidth, $innerHeight); |
| 4884 | $stream->fillEvenOdd(); |
| 4885 | $stream->restoreGraphicsState(); |
| 4886 | } |
| 4887 | |
| 4888 | /** |
| 4889 | * Filter Effects 1 §16.1 — paint `filter: drop-shadow(...)` as an |
| 4890 | * offset rect behind the box. Syntax matches `box-shadow`'s |
| 4891 | * `<offset-x> <offset-y> <blur>? <color>?` minus `inset` and |
| 4892 | * `spread`. Multiple drop-shadow filters in the value list paint |
| 4893 | * back-to-front (first listed sits on top), matching CSS stacking. |
| 4894 | * Other filter primitives (`blur`, `brightness`, `grayscale`, …) |
| 4895 | * silently fall through — they require raster pre-painting. |
| 4896 | */ |
| 4897 | private function paintFilterDropShadow(Box $box, ContentStream $stream): void |
| 4898 | { |
| 4899 | $value = $box->style->get('filter'); |
| 4900 | if ($value === null |
| 4901 | || ($value instanceof Keyword && strtolower($value->name) === 'none') |
| 4902 | ) { |
| 4903 | return; |
| 4904 | } |
| 4905 | $shadows = $this->collectDropShadowFilters($value); |
| 4906 | if ($shadows === []) { |
| 4907 | return; |
| 4908 | } |
| 4909 | $defaultColor = $box->style->get('color'); |
| 4910 | $textColor = $defaultColor instanceof Color ? $defaultColor : new Color(0, 0, 0, 1); |
| 4911 | $geo = $box->geometry; |
| 4912 | foreach (array_reverse($shadows) as $shadow) { |
| 4913 | $color = $shadow['color'] ?? $textColor; |
| 4914 | $x = $geo->x - $geo->paddingLeft - $geo->borderLeft + $shadow['offsetX']; |
| 4915 | $top = $geo->y - $geo->paddingTop - $geo->borderTop + $shadow['offsetY']; |
| 4916 | $width = $geo->paddingLeft + $geo->width + $geo->paddingRight |
| 4917 | + $geo->borderLeft + $geo->borderRight; |
| 4918 | $height = $geo->paddingTop + $geo->height + $geo->paddingBottom |
| 4919 | + $geo->borderTop + $geo->borderBottom; |
| 4920 | if ($width <= 0.0 || $height <= 0.0) { |
| 4921 | continue; |
| 4922 | } |
| 4923 | $this->emitRect($stream, $x, $top, $width, $height, fill: $color); |
| 4924 | } |
| 4925 | } |
| 4926 | |
| 4927 | /** |
| 4928 | * Walk a `filter` value collecting every `drop-shadow(...)` call. |
| 4929 | * Returns `[]` when no drop-shadow appears (other filter primitives |
| 4930 | * are skipped without warning). |
| 4931 | * |
| 4932 | * @return list<array{offsetX: float, offsetY: float, blur: float, color: ?Color}> |
| 4933 | */ |
| 4934 | private function collectDropShadowFilters(\Phpdftk\Css\Value\Value $value): array |
| 4935 | { |
| 4936 | $out = []; |
| 4937 | // Filter post-processing typed form: Filter<list<FilterFunction>>. |
| 4938 | if ($value instanceof \Phpdftk\Css\Value\Filter) { |
| 4939 | foreach ($value->functions as $fn) { |
| 4940 | if ($fn->kind === \Phpdftk\Css\Value\FilterKind::DropShadow) { |
| 4941 | $parsed = $this->parseDropShadowArgs($fn->args); |
| 4942 | if ($parsed !== null) { |
| 4943 | $out[] = $parsed; |
| 4944 | } |
| 4945 | } |
| 4946 | } |
| 4947 | return $out; |
| 4948 | } |
| 4949 | // Legacy generic form (CssFunction / ValueList<CssFunction>) for |
| 4950 | // value-paths that bypass Parser::makeDeclaration. |
| 4951 | $items = $value instanceof \Phpdftk\Css\Value\ValueList |
| 4952 | ? $value->values |
| 4953 | : [$value]; |
| 4954 | foreach ($items as $item) { |
| 4955 | if (!$item instanceof \Phpdftk\Css\Value\CssFunction) { |
| 4956 | continue; |
| 4957 | } |
| 4958 | if (strtolower($item->name) !== 'drop-shadow') { |
| 4959 | continue; |
| 4960 | } |
| 4961 | $parsed = $this->parseDropShadowArgs($item->arguments); |
| 4962 | if ($parsed !== null) { |
| 4963 | $out[] = $parsed; |
| 4964 | } |
| 4965 | } |
| 4966 | return $out; |
| 4967 | } |
| 4968 | |
| 4969 | /** |
| 4970 | * Parse `drop-shadow(<offset-x> <offset-y> [<blur>] [<color>])` |
| 4971 | * arguments into a layer struct. The CSS parser wraps a |
| 4972 | * space-separated function-arg list inside a single ValueList, |
| 4973 | * so flatten one level of ValueList before scanning. |
| 4974 | * |
| 4975 | * @param list<\Phpdftk\Css\Value\Value> $args |
| 4976 | * @return array{offsetX: float, offsetY: float, blur: float, color: ?Color}|null |
| 4977 | */ |
| 4978 | private function parseDropShadowArgs(array $args): ?array |
| 4979 | { |
| 4980 | $flat = []; |
| 4981 | foreach ($args as $a) { |
| 4982 | if ($a instanceof \Phpdftk\Css\Value\ValueList) { |
| 4983 | foreach ($a->values as $inner) { |
| 4984 | $flat[] = $inner; |
| 4985 | } |
| 4986 | } else { |
| 4987 | $flat[] = $a; |
| 4988 | } |
| 4989 | } |
| 4990 | $color = null; |
| 4991 | $lengths = []; |
| 4992 | foreach ($flat as $a) { |
| 4993 | if ($a instanceof Color) { |
| 4994 | $color = $a; |
| 4995 | continue; |
| 4996 | } |
| 4997 | if ($a instanceof \Phpdftk\Css\Value\Length) { |
| 4998 | $lengths[] = $a->value; |
| 4999 | continue; |
| 5000 | } |
| 5001 | if ($a instanceof \Phpdftk\Css\Value\Integer |
| 5002 | || $a instanceof \Phpdftk\Css\Value\Number |
| 5003 | ) { |
| 5004 | $lengths[] = (float) $a->value; |
| 5005 | } |
| 5006 | } |
| 5007 | if (count($lengths) < 2) { |
| 5008 | return null; |
| 5009 | } |
| 5010 | return [ |
| 5011 | 'offsetX' => $lengths[0], |
| 5012 | 'offsetY' => $lengths[1], |
| 5013 | 'blur' => $lengths[2] ?? 0.0, |
| 5014 | 'color' => $color, |
| 5015 | ]; |
| 5016 | } |
| 5017 | |
| 5018 | /** |
| 5019 | * Parse the value list(s) into per-shadow layer arrays. |
| 5020 | * |
| 5021 | * @return list<array{offsetX: float, offsetY: float, blur: float, spread: float, color: ?Color, inset: bool}> |
| 5022 | */ |
| 5023 | private function collectShadowLayers(\Phpdftk\Css\Value\Value $value): array |
| 5024 | { |
| 5025 | if ($value instanceof \Phpdftk\Css\Value\ValueList |
| 5026 | && $value->separator === \Phpdftk\Css\Value\ListSeparator::Comma |
| 5027 | ) { |
| 5028 | $layers = []; |
| 5029 | foreach ($value->values as $item) { |
| 5030 | $parsed = $this->parseShadowLayer($item); |
| 5031 | if ($parsed !== null) { |
| 5032 | $layers[] = $parsed; |
| 5033 | } |
| 5034 | } |
| 5035 | return $layers; |
| 5036 | } |
| 5037 | $single = $this->parseShadowLayer($value); |
| 5038 | return $single === null ? [] : [$single]; |
| 5039 | } |
| 5040 | |
| 5041 | /** |
| 5042 | * @return array{offsetX: float, offsetY: float, blur: float, spread: float, color: ?Color, inset: bool}|null |
| 5043 | */ |
| 5044 | private function parseShadowLayer(\Phpdftk\Css\Value\Value $value): ?array |
| 5045 | { |
| 5046 | $components = $value instanceof \Phpdftk\Css\Value\ValueList |
| 5047 | ? $value->values |
| 5048 | : [$value]; |
| 5049 | |
| 5050 | $inset = false; |
| 5051 | $color = null; |
| 5052 | $lengths = []; |
| 5053 | foreach ($components as $c) { |
| 5054 | if ($c instanceof Keyword && strtolower($c->name) === 'inset') { |
| 5055 | $inset = true; |
| 5056 | continue; |
| 5057 | } |
| 5058 | if ($c instanceof Color) { |
| 5059 | $color = $c; |
| 5060 | continue; |
| 5061 | } |
| 5062 | if ($c instanceof \Phpdftk\Css\Value\Length) { |
| 5063 | $lengths[] = $c->value; |
| 5064 | continue; |
| 5065 | } |
| 5066 | // CSS Values 4 §6.2: a unitless `0` is a valid zero-length |
| 5067 | // wherever a length is expected. Accept Integer/Number |
| 5068 | // values as zero (and treat non-zero numerics as 0 — the |
| 5069 | // grammar requires a unit otherwise). |
| 5070 | if ($c instanceof \Phpdftk\Css\Value\Integer |
| 5071 | || $c instanceof \Phpdftk\Css\Value\Number |
| 5072 | ) { |
| 5073 | $lengths[] = (float) $c->value; |
| 5074 | } |
| 5075 | } |
| 5076 | if (count($lengths) < 2) { |
| 5077 | return null; |
| 5078 | } |
| 5079 | return [ |
| 5080 | 'offsetX' => $lengths[0], |
| 5081 | 'offsetY' => $lengths[1], |
| 5082 | 'blur' => $lengths[2] ?? 0.0, |
| 5083 | 'spread' => $lengths[3] ?? 0.0, |
| 5084 | 'color' => $color, |
| 5085 | 'inset' => $inset, |
| 5086 | ]; |
| 5087 | } |
| 5088 | |
| 5089 | /** |
| 5090 | * Resolve the box's cascaded `opacity`. Returns the page-level |
| 5091 | * `ExtGState` resource name to invoke for partial opacity, or null |
| 5092 | * when opacity is full (1.0) or the painter wasn't given a Page |
| 5093 | * reference. Opacity affects this box plus every descendant since |
| 5094 | * the `gs` operator persists until the matching `Q`. |
| 5095 | */ |
| 5096 | private function resolveOpacityGsName(Box $box): ?string |
| 5097 | { |
| 5098 | if ($this->page === null) { |
| 5099 | return null; |
| 5100 | } |
| 5101 | $value = $box->style->get('opacity'); |
| 5102 | $alpha = match (true) { |
| 5103 | $value instanceof \Phpdftk\Css\Value\Number => $value->value, |
| 5104 | $value instanceof \Phpdftk\Css\Value\Integer => (float) $value->value, |
| 5105 | default => 1.0, |
| 5106 | }; |
| 5107 | $alpha = max(0.0, min(1.0, $alpha)); |
| 5108 | if ($alpha >= 0.999) { |
| 5109 | return null; |
| 5110 | } |
| 5111 | return $this->page->ensureOpacityState($alpha, $alpha); |
| 5112 | } |
| 5113 | |
| 5114 | /** |
| 5115 | * Paint a CSS Lists 3 list marker (the `::marker` pseudo) for boxes |
| 5116 | * with `display: list-item`, honouring `list-style-type` for the |
| 5117 | * three geometric markers (`disc` / `circle` / `square`). Counter- |
| 5118 | * style markers (`decimal`, `lower-alpha`, etc.) require font |
| 5119 | * rendering of the running counter and live in Phase 2; they fall |
| 5120 | * through to a `disc` (filled circle) here. Marker colour follows |
| 5121 | * the cascaded `color`. |
| 5122 | */ |
| 5123 | private function paintListMarker(Box $box, ContentStream $stream): void |
| 5124 | { |
| 5125 | $display = $box->style->get('display'); |
| 5126 | if (!$display instanceof Keyword || strtolower($display->name) !== 'list-item') { |
| 5127 | return; |
| 5128 | } |
| 5129 | // HTML §15.3.9 — a `<fieldset>` is a list item that draws no |
| 5130 | // marker. Flagged at box generation; see Box::$suppressesListMarker. |
| 5131 | if ($box->suppressesListMarker) { |
| 5132 | return; |
| 5133 | } |
| 5134 | // CSS Lists 3 §3.3 — `list-style-position: inside` markers are |
| 5135 | // INLINE content, not a box painted alongside the principal box. |
| 5136 | // BoxGenerator materialises those as a text child so they take |
| 5137 | // part in line layout; painting one here too would double them. |
| 5138 | $position = $box->style->get('list-style-position'); |
| 5139 | if ($position instanceof Keyword && strtolower($position->name) === 'inside') { |
| 5140 | return; |
| 5141 | } |
| 5142 | $typeValue = $box->style->get('list-style-type'); |
| 5143 | $type = $typeValue instanceof Keyword ? strtolower($typeValue->name) : 'disc'; |
| 5144 | if ($type === 'none') { |
| 5145 | return; |
| 5146 | } |
| 5147 | |
| 5148 | $color = $box->style->get('color'); |
| 5149 | $markerColor = $color instanceof Color ? $color : new Color(0, 0, 0, 1); |
| 5150 | $fontSize = $this->dominantFontSize($box); |
| 5151 | |
| 5152 | // Counter-style markers — formatted text, requires a registered font. |
| 5153 | $counterText = $this->formatCounterMarker($box, $type); |
| 5154 | if ($counterText !== null && $this->defaultFont !== null) { |
| 5155 | $this->paintCounterMarker($box, $stream, $markerColor, $fontSize, $counterText); |
| 5156 | return; |
| 5157 | } |
| 5158 | |
| 5159 | $size = max(2.0, $fontSize / 3.0); |
| 5160 | $x = $box->geometry->x - max(6.0, $fontSize * 0.5); |
| 5161 | $layoutY = $box->geometry->y + $fontSize * 0.35; |
| 5162 | $pdfY = $this->pageHeight - $layoutY - $size; |
| 5163 | |
| 5164 | $stream->saveGraphicsState(); |
| 5165 | $stream->setFillColorRGB($markerColor->r, $markerColor->g, $markerColor->b); |
| 5166 | $stream->setStrokeColorRGB($markerColor->r, $markerColor->g, $markerColor->b); |
| 5167 | match ($type) { |
| 5168 | 'circle' => $this->paintMarkerCircle($stream, $x, $pdfY, $size, fill: false), |
| 5169 | 'square' => $this->paintMarkerSquare($stream, $x, $pdfY, $size), |
| 5170 | default => $this->paintMarkerCircle($stream, $x, $pdfY, $size, fill: true), |
| 5171 | }; |
| 5172 | $stream->restoreGraphicsState(); |
| 5173 | } |
| 5174 | |
| 5175 | /** |
| 5176 | * Format the marker text for counter-style list-style-types. Returns |
| 5177 | * null for geometric / unknown / `none` types (caller paints the |
| 5178 | * geometric stand-in or skips). |
| 5179 | */ |
| 5180 | private function formatCounterMarker(Box $box, string $type): ?string |
| 5181 | { |
| 5182 | $index = $this->listItemIndex($box); |
| 5183 | if ($index < 1) { |
| 5184 | return null; |
| 5185 | } |
| 5186 | $supported = [ |
| 5187 | 'decimal', 'decimal-leading-zero', |
| 5188 | 'lower-alpha', 'lower-latin', 'upper-alpha', 'upper-latin', |
| 5189 | 'lower-roman', 'upper-roman', |
| 5190 | ]; |
| 5191 | if (!in_array(strtolower($type), $supported, true)) { |
| 5192 | return null; |
| 5193 | } |
| 5194 | return \Phpdftk\HtmlToPdf\Layout\CounterFormat::format($index, $type) . '.'; |
| 5195 | } |
| 5196 | |
| 5197 | /** |
| 5198 | * The ordinal `$box`'s `::marker` counts with. Returns 0 when the box |
| 5199 | * is not a numbered list item, which the caller reads as "no marker". |
| 5200 | * |
| 5201 | * The number itself is decided during box generation and parked on |
| 5202 | * {@see Box::$listItemOrdinal} — HTML's "list owner" is the nearest |
| 5203 | * ancestor `ol` / `ul` / `menu` THAT GENERATES BOXES, and an item that |
| 5204 | * generates no boxes consumes no ordinal, so the answer is not |
| 5205 | * recoverable from the DOM at paint time. Reading the same field the |
| 5206 | * `inside` marker was built from is also what keeps the two marker |
| 5207 | * positions numbering a list identically. |
| 5208 | */ |
| 5209 | private function listItemIndex(Box $box): int |
| 5210 | { |
| 5211 | return $box->listItemOrdinal ?? 0; |
| 5212 | } |
| 5213 | |
| 5214 | /** |
| 5215 | * Paint a counter-style marker — shapes the text against the |
| 5216 | * registered font and emits a Tj at the marker position. |
| 5217 | */ |
| 5218 | private function paintCounterMarker( |
| 5219 | Box $box, |
| 5220 | ContentStream $stream, |
| 5221 | Color $color, |
| 5222 | float $fontSize, |
| 5223 | string $text, |
| 5224 | ): void { |
| 5225 | $font = $this->defaultFont; |
| 5226 | if (!$font instanceof WriterFont) { |
| 5227 | return; |
| 5228 | } |
| 5229 | // CSS Lists 3 §3.2 — a counter marker is ordinary shaped text, so |
| 5230 | // ANY parsed face will do. `ShapingContext` takes the `FontFaceData` |
| 5231 | // base type; narrowing to `OpenTypeData` (the CFF flavour) silently |
| 5232 | // dropped every numbered marker whenever the default face was a |
| 5233 | // TrueType/`glyf` font — i.e. for DejaVu, Ahem and most web fonts. |
| 5234 | $otd = $font->getParsedData(); |
| 5235 | if (!$otd instanceof \Phpdftk\FontParser\FontFaceData) { |
| 5236 | return; |
| 5237 | } |
| 5238 | $shaper = new \Phpdftk\Text\Shaper(); |
| 5239 | $shapedRun = $shaper->shapeRun( |
| 5240 | $text, |
| 5241 | new \Phpdftk\Text\ShapingContext($otd, $fontSize), |
| 5242 | ); |
| 5243 | if ($shapedRun->glyphs === []) { |
| 5244 | return; |
| 5245 | } |
| 5246 | $ascent = ($otd->ascent / max(1, $otd->unitsPerEm)) * $fontSize; |
| 5247 | // Right-align the marker so it sits just to the left of the box content. |
| 5248 | $width = $shapedRun->totalAdvance; |
| 5249 | $x = $box->geometry->x - $width - max(2.0, $fontSize * 0.2); |
| 5250 | $baselineY = $box->geometry->y + $ascent; |
| 5251 | $pdfY = $this->pageHeight - $baselineY; |
| 5252 | |
| 5253 | $hex = ''; |
| 5254 | $gidMap = $font->getOldToNewGidMap(); |
| 5255 | foreach ($shapedRun->glyphs as $g) { |
| 5256 | $hex .= sprintf('%04X', $gidMap[$g->glyphId] ?? $g->glyphId); |
| 5257 | } |
| 5258 | |
| 5259 | $stream->saveGraphicsState(); |
| 5260 | $stream->setFillColorRGB($color->r, $color->g, $color->b); |
| 5261 | $stream->beginText(); |
| 5262 | $stream->setFont($font, $fontSize); |
| 5263 | $stream->setTextMatrix(1, 0, 0, 1, $x, $pdfY); |
| 5264 | $stream->showTextHex($hex); |
| 5265 | $stream->endText(); |
| 5266 | $stream->restoreGraphicsState(); |
| 5267 | } |
| 5268 | |
| 5269 | private function paintMarkerSquare(ContentStream $stream, float $x, float $y, float $size): void |
| 5270 | { |
| 5271 | $stream->rectangle($x, $y, $size, $size); |
| 5272 | $stream->fill(); |
| 5273 | } |
| 5274 | |
| 5275 | /** |
| 5276 | * Approximate a circle inside the bounding box (x, y, size, size) with |
| 5277 | * four cubic Bézier curves. The classic offset constant for unit-radius |
| 5278 | * approximation is `0.5522847498` — keeps the curve within ≈ 0.027% of |
| 5279 | * the true circle, more than enough at marker scale. |
| 5280 | */ |
| 5281 | private function paintMarkerCircle( |
| 5282 | ContentStream $stream, |
| 5283 | float $x, |
| 5284 | float $y, |
| 5285 | float $size, |
| 5286 | bool $fill, |
| 5287 | ): void { |
| 5288 | $r = $size / 2.0; |
| 5289 | $cx = $x + $r; |
| 5290 | $cy = $y + $r; |
| 5291 | $k = $r * 0.5522847498307933; |
| 5292 | $stream->moveTo($cx + $r, $cy); |
| 5293 | $stream->curveTo($cx + $r, $cy + $k, $cx + $k, $cy + $r, $cx, $cy + $r); |
| 5294 | $stream->curveTo($cx - $k, $cy + $r, $cx - $r, $cy + $k, $cx - $r, $cy); |
| 5295 | $stream->curveTo($cx - $r, $cy - $k, $cx - $k, $cy - $r, $cx, $cy - $r); |
| 5296 | $stream->curveTo($cx + $k, $cy - $r, $cx + $r, $cy - $k, $cx + $r, $cy); |
| 5297 | $stream->closePath(); |
| 5298 | if ($fill) { |
| 5299 | $stream->fill(); |
| 5300 | } else { |
| 5301 | $stream->setLineWidth(max(0.4, $r / 6.0)); |
| 5302 | $stream->stroke(); |
| 5303 | } |
| 5304 | } |
| 5305 | |
| 5306 | private function dominantFontSize(Box $box): float |
| 5307 | { |
| 5308 | $value = $box->style->get('font-size'); |
| 5309 | if ($value instanceof \Phpdftk\Css\Value\Length) { |
| 5310 | return $value->value; |
| 5311 | } |
| 5312 | return 12.0; |
| 5313 | } |
| 5314 | |
| 5315 | /** |
| 5316 | * Emit glyphs for every {@see InlineFragment} in this box's line boxes. |
| 5317 | * Requires a {@see RegisteredFont} on the painter — without one, text |
| 5318 | * painting is a no-op so block + border content still renders. |
| 5319 | * |
| 5320 | * Coordinates: layout space is top-down; PDF text positioning is |
| 5321 | * baseline-relative in bottom-up space. The baseline sits at |
| 5322 | * `lineBox.y + ascent` where ascent = (font.ascent / unitsPerEm) × |
| 5323 | * fontSize. The painter converts to PDF Y by subtracting from |
| 5324 | * `$this->pageHeight`. |
| 5325 | */ |
| 5326 | private function paintLineBoxes(Box $box, ContentStream $stream): void |
| 5327 | { |
| 5328 | // Text emission needs a registered font to look up. Skip |
| 5329 | // entirely when neither the registered map nor the explicit |
| 5330 | // default supplies a candidate Tf resource for any fragment — |
| 5331 | // the result is a no-op text pass so background/border |
| 5332 | // content still renders. |
| 5333 | if ($box->lineBoxes === [] |
| 5334 | || ($this->defaultFont === null && $this->registeredFonts === []) |
| 5335 | ) { |
| 5336 | return; |
| 5337 | } |
| 5338 | $color = $box->style->get('color'); |
| 5339 | $textColor = $color instanceof Color ? $color : new Color(0, 0, 0, 1); |
| 5340 | |
| 5341 | $shadows = $this->collectTextShadowLayers($box, $textColor); |
| 5342 | // CSS 2.1 Appendix E — inline content paints in TREE order, so each |
| 5343 | // line's background goes down immediately before its own glyphs |
| 5344 | // rather than every background preceding every glyph. The difference |
| 5345 | // shows once a background can extend past its line: an inline whose |
| 5346 | // vertical padding bleeds upward has to cover the previous line's |
| 5347 | // text, which it cannot do if that text is painted afterwards. |
| 5348 | foreach ($box->lineBoxes as $line) { |
| 5349 | // Inline backgrounds (`<mark>` and friends) paint as a strip |
| 5350 | // behind each fragment carrying a `backgroundColor`, before this |
| 5351 | // line's text + shadow passes so its own glyphs sit on top. |
| 5352 | $this->paintInlineBackgrounds($box, $line, $stream); |
| 5353 | // Paint shadow layers behind the real text. CSS Text Decoration 4 |
| 5354 | // §6 says the first listed shadow is painted on top, so we |
| 5355 | // reverse the list for the back-to-front emission order. |
| 5356 | foreach (array_reverse($shadows) as $shadow) { |
| 5357 | $this->paintLine( |
| 5358 | $box, |
| 5359 | $line, |
| 5360 | $stream, |
| 5361 | $shadow['color'], |
| 5362 | $shadow['offsetX'], |
| 5363 | $shadow['offsetY'], |
| 5364 | ); |
| 5365 | } |
| 5366 | $this->paintLine($box, $line, $stream, $textColor); |
| 5367 | $this->paintTextDecorations($box, $line, $stream, $textColor); |
| 5368 | } |
| 5369 | } |
| 5370 | |
| 5371 | /** |
| 5372 | * Paint per-fragment inline background rectangles. Each fragment that |
| 5373 | * carries a `backgroundColor` (propagated from an inline element like |
| 5374 | * `<mark>` whose cascade sets `background-color`) gets a filled rect |
| 5375 | * spanning the fragment's width and the line's height. Adjacent |
| 5376 | * fragments with the same colour are merged so we emit one wider rect |
| 5377 | * per run of same-colour fragments — cheaper output without sub-pixel |
| 5378 | * gaps from neighbouring fills. |
| 5379 | */ |
| 5380 | private function paintInlineBackgrounds(Box $box, LineBox $line, ContentStream $stream): void |
| 5381 | { |
| 5382 | if ($line->fragments === []) { |
| 5383 | return; |
| 5384 | } |
| 5385 | // Coalesce contiguous fragments that share a background colour into |
| 5386 | // single rects so we emit cheaper output without sub-pixel gaps. |
| 5387 | /** @var list<array{x: float, width: float, color: Color, above: float, below: float}> $runs */ |
| 5388 | $runs = []; |
| 5389 | foreach ($line->fragments as $fragment) { |
| 5390 | $bg = $fragment->backgroundColor; |
| 5391 | // A fully transparent background paints nothing — the CSS |
| 5392 | // `background-color` initial is `transparent` (rgba(0,0,0,0)), |
| 5393 | // which every inline box computes and propagates to its |
| 5394 | // fragments, so without this guard a plain nested inline (or |
| 5395 | // generated counter/marker content) fills an opaque BLACK rect |
| 5396 | // over its own text. Mirrors the alpha guards already at |
| 5397 | // paintBoxShadow and boxHasPaintableBackground. |
| 5398 | if ($bg === null || $bg->a <= 0.0) { |
| 5399 | continue; |
| 5400 | } |
| 5401 | $last = $runs === [] ? null : $runs[array_key_last($runs)]; |
| 5402 | $sameAsLast = $last !== null |
| 5403 | && abs($last['x'] + $last['width'] - $fragment->x) < 0.001 |
| 5404 | && $last['color']->r === $bg->r |
| 5405 | && $last['color']->g === $bg->g |
| 5406 | && $last['color']->b === $bg->b |
| 5407 | && $last['above'] === $fragment->bgExtendAbove |
| 5408 | && $last['below'] === $fragment->bgExtendBelow; |
| 5409 | if ($sameAsLast) { |
| 5410 | $runs[array_key_last($runs)]['width'] = ($fragment->x + $fragment->width) - $last['x']; |
| 5411 | } else { |
| 5412 | $runs[] = [ |
| 5413 | 'x' => $fragment->x, |
| 5414 | 'width' => $fragment->width, |
| 5415 | 'color' => $bg, |
| 5416 | 'above' => $fragment->bgExtendAbove, |
| 5417 | 'below' => $fragment->bgExtendBelow, |
| 5418 | ]; |
| 5419 | } |
| 5420 | } |
| 5421 | if ($runs === []) { |
| 5422 | return; |
| 5423 | } |
| 5424 | $pdfY = $this->pageHeight - ($box->geometry->y + $line->y + $line->height); |
| 5425 | foreach ($runs as $run) { |
| 5426 | $stream->saveGraphicsState(); |
| 5427 | $stream->setFillColorRGB($run['color']->r, $run['color']->g, $run['color']->b); |
| 5428 | // CSS 2.1 §10.6.1 — an inline box's vertical padding and border |
| 5429 | // do not grow the line box, but they ARE painted, so the |
| 5430 | // background bleeds over the lines above and below rather than |
| 5431 | // being clipped to this one. |
| 5432 | $stream->rectangle( |
| 5433 | $box->geometry->x + $run['x'], |
| 5434 | $pdfY - $run['below'], |
| 5435 | $run['width'], |
| 5436 | $line->height + $run['above'] + $run['below'], |
| 5437 | ); |
| 5438 | $stream->fill(); |
| 5439 | $stream->restoreGraphicsState(); |
| 5440 | } |
| 5441 | } |
| 5442 | |
| 5443 | /** |
| 5444 | * Parse the cascaded `text-shadow` value into layer entries. Returns |
| 5445 | * an empty array when text-shadow is `none` or absent. |
| 5446 | * |
| 5447 | * @return list<array{offsetX: float, offsetY: float, color: Color}> |
| 5448 | */ |
| 5449 | private function collectTextShadowLayers(Box $box, Color $fallback): array |
| 5450 | { |
| 5451 | $value = $box->style->get('text-shadow'); |
| 5452 | if ($value === null |
| 5453 | || ($value instanceof Keyword && strtolower($value->name) === 'none') |
| 5454 | ) { |
| 5455 | return []; |
| 5456 | } |
| 5457 | $layers = []; |
| 5458 | $items = $value instanceof \Phpdftk\Css\Value\ValueList |
| 5459 | && $value->separator === \Phpdftk\Css\Value\ListSeparator::Comma |
| 5460 | ? $value->values |
| 5461 | : [$value]; |
| 5462 | foreach ($items as $item) { |
| 5463 | $components = $item instanceof \Phpdftk\Css\Value\ValueList ? $item->values : [$item]; |
| 5464 | $lengths = []; |
| 5465 | $color = null; |
| 5466 | foreach ($components as $c) { |
| 5467 | if ($c instanceof \Phpdftk\Css\Value\Length) { |
| 5468 | $lengths[] = $c->value; |
| 5469 | } elseif ($c instanceof Color) { |
| 5470 | $color = $c; |
| 5471 | } |
| 5472 | } |
| 5473 | if (count($lengths) < 2) { |
| 5474 | continue; |
| 5475 | } |
| 5476 | $layers[] = [ |
| 5477 | 'offsetX' => $lengths[0], |
| 5478 | 'offsetY' => $lengths[1], |
| 5479 | 'color' => $color ?? $fallback, |
| 5480 | ]; |
| 5481 | } |
| 5482 | return $layers; |
| 5483 | } |
| 5484 | |
| 5485 | private function paintLine( |
| 5486 | Box $box, |
| 5487 | LineBox $line, |
| 5488 | ContentStream $stream, |
| 5489 | Color $color, |
| 5490 | float $offsetX = 0.0, |
| 5491 | float $offsetY = 0.0, |
| 5492 | ): void { |
| 5493 | if ($line->fragments === []) { |
| 5494 | return; |
| 5495 | } |
| 5496 | $stream->saveGraphicsState(); |
| 5497 | $stream->setFillColorRGB($color->r, $color->g, $color->b); |
| 5498 | $stream->beginText(); |
| 5499 | $activeColor = $color; |
| 5500 | foreach ($line->fragments as $fragment) { |
| 5501 | // Inline-level `color` override: when the fragment carries its |
| 5502 | // own colour (typically `<a>` inheriting blue from the UA |
| 5503 | // stylesheet inside a black `<p>`), reseat the fill colour. |
| 5504 | $fragColor = $fragment->textColor ?? $color; |
| 5505 | if ($fragColor !== $activeColor) { |
| 5506 | $stream->setFillColorRGB($fragColor->r, $fragColor->g, $fragColor->b); |
| 5507 | $activeColor = $fragColor; |
| 5508 | } |
| 5509 | $this->paintFragment($box, $line, $fragment, $stream, $fragColor, $offsetX, $offsetY); |
| 5510 | } |
| 5511 | // Reset rendering mode in case the last fragment left it set. |
| 5512 | $stream->setTextRenderingMode(0); |
| 5513 | $stream->endText(); |
| 5514 | $stream->restoreGraphicsState(); |
| 5515 | } |
| 5516 | |
| 5517 | /** |
| 5518 | * Paint text-decoration lines (underline / overline / line-through) for |
| 5519 | * every fragment whose parent style sets `text-decoration-line` to a |
| 5520 | * non-`none` value. |
| 5521 | * |
| 5522 | * Position approximation per CSS Text Decoration 3 §3: |
| 5523 | * - underline: baseline + 0.15 × fontSize |
| 5524 | * - overline: baseline − ascent (top of em box) |
| 5525 | * - line-through: baseline − 0.3 × fontSize (~x-height middle) |
| 5526 | * Thickness: `fontSize / 14`. |
| 5527 | * |
| 5528 | * The fallback approximations stand in until `phpdftk/font-parser` |
| 5529 | * exposes the OS/2 sTypoUnderlinePosition / underlineThickness fields. |
| 5530 | */ |
| 5531 | /** |
| 5532 | * Resolved `text-decoration-skip-spaces` mode: `none` (decorate |
| 5533 | * through all white space), `all` (skip every white-space run), or |
| 5534 | * `start end` — the initial value, and the fallback for any value |
| 5535 | * we do not model. |
| 5536 | * |
| 5537 | * @return 'none'|'all'|'start end' |
| 5538 | */ |
| 5539 | private function decorationSkipSpaces(Box $box): string |
| 5540 | { |
| 5541 | $value = $box->style->get('text-decoration-skip-spaces'); |
| 5542 | if (!($value instanceof Keyword)) { |
| 5543 | return 'start end'; |
| 5544 | } |
| 5545 | return match (strtolower($value->name)) { |
| 5546 | 'none' => 'none', |
| 5547 | 'all' => 'all', |
| 5548 | default => 'start end', |
| 5549 | }; |
| 5550 | } |
| 5551 | |
| 5552 | private function paintTextDecorations(Box $box, LineBox $line, ContentStream $stream, Color $color): void |
| 5553 | { |
| 5554 | $blockLines = $this->textDecorationLines($box); |
| 5555 | $decoColor = $this->textDecorationColor($box, $color); |
| 5556 | // CSS Text Decoration 4 §5 — `text-decoration-skip-spaces`. |
| 5557 | // The initial `start end` keeps decorations off the white space |
| 5558 | // at each END of the line while still drawing through interior |
| 5559 | // spaces, so locate the first and last fragments with ink. |
| 5560 | $skipSpaces = $this->decorationSkipSpaces($box); |
| 5561 | $firstInk = null; |
| 5562 | $lastInk = null; |
| 5563 | if ($skipSpaces !== 'none') { |
| 5564 | foreach ($line->fragments as $inkIndex => $inkFragment) { |
| 5565 | if (!$inkFragment->isWhitespace) { |
| 5566 | $firstInk ??= $inkIndex; |
| 5567 | $lastInk = $inkIndex; |
| 5568 | } |
| 5569 | } |
| 5570 | } |
| 5571 | foreach ($line->fragments as $fragmentIndex => $fragment) { |
| 5572 | if ($fragment->isWhitespace && $skipSpaces !== 'none') { |
| 5573 | if ($skipSpaces === 'all' |
| 5574 | || $firstInk === null |
| 5575 | || $lastInk === null |
| 5576 | || $fragmentIndex < $firstInk |
| 5577 | || $fragmentIndex > $lastInk |
| 5578 | ) { |
| 5579 | continue; |
| 5580 | } |
| 5581 | } |
| 5582 | // CSS Text Decoration 4 §2: a fragment's effective decoration |
| 5583 | // is the union of inherited (from inline ancestors) + block- |
| 5584 | // level lines. Block-level wins for color since the value |
| 5585 | // doesn't inherit through inlines. |
| 5586 | $lines = array_values(array_unique(array_merge($blockLines, $fragment->decorationLines))); |
| 5587 | if ($lines === []) { |
| 5588 | continue; |
| 5589 | } |
| 5590 | $shapedRun = $fragment->shapedRun; |
| 5591 | if ($shapedRun->glyphs === [] && $fragment->width <= 0.0) { |
| 5592 | continue; |
| 5593 | } |
| 5594 | $fontSize = $shapedRun->fontSizePt; |
| 5595 | $font = $shapedRun->font; |
| 5596 | $unitsPerEm = max(1, $font->unitsPerEm); |
| 5597 | $ascent = ($font->ascent / $unitsPerEm) * $fontSize; |
| 5598 | // Real OS/2 underline metrics when available; fall back to the |
| 5599 | // 1G.3 approximation otherwise. |
| 5600 | $underlineOffset = $font->underlinePosition !== null |
| 5601 | ? -($font->underlinePosition / $unitsPerEm) * $fontSize |
| 5602 | : 0.15 * $fontSize; |
| 5603 | $thickness = $font->underlineThickness !== null |
| 5604 | ? max(0.5, ($font->underlineThickness / $unitsPerEm) * $fontSize) |
| 5605 | : max(0.5, $fontSize / 14.0); |
| 5606 | // CSS Text Decoration 4 §4 — `text-decoration-thickness` |
| 5607 | // explicit Length / Percentage overrides the font metric. |
| 5608 | // `auto` defers to the metric above. |
| 5609 | // CSS Text Decoration 4 §4 — these belong to the box that |
| 5610 | // INTRODUCED the decoration. When the block itself declares |
| 5611 | // no lines, the decoration came from an inline ancestor via |
| 5612 | // `$fragment->decorationLines`, and applying the block's |
| 5613 | // own thickness / style to it is simply reading the wrong |
| 5614 | // box — the same reasoning `$fragment->decorationColor` |
| 5615 | // already follows below. |
| 5616 | $explicitThickness = $blockLines === [] |
| 5617 | ? null |
| 5618 | : $this->resolveDecorationThickness($box, $fontSize); |
| 5619 | if ($explicitThickness !== null) { |
| 5620 | $thickness = max(0.5, $explicitThickness); |
| 5621 | } |
| 5622 | // `text-underline-offset` shifts the underline ONLY (not |
| 5623 | // overline or line-through). Positive values push the line |
| 5624 | // further below the baseline. |
| 5625 | $explicitUnderlineOffset = $this->resolveUnderlineOffset($box, $fontSize); |
| 5626 | $x = $box->geometry->x + $fragment->x; |
| 5627 | $width = $fragment->width; |
| 5628 | // Anchor decorations to the fragment's painted baseline: the |
| 5629 | // line's shared baseline plus the fragment's own vertical-align |
| 5630 | // shift (matching paintFragment). The underline/overline offsets |
| 5631 | // below stay relative to the fragment's own ascent. |
| 5632 | $baselineY = $box->geometry->y + $line->y + $line->baseline + $fragment->baselineShift; |
| 5633 | $style = $blockLines === [] ? 'solid' : $this->textDecorationStyle($box); |
| 5634 | // Per CSS Text Decoration 4 §3, the decoration colour follows |
| 5635 | // the *originating* element's `text-decoration-color` (when |
| 5636 | // explicitly set) — fall back to the fragment's `color` (so an |
| 5637 | // inline `<a>` with cascaded `color: blue` paints a blue |
| 5638 | // underline) and finally to the block-level value resolved at |
| 5639 | // the outer paint context. |
| 5640 | $effectiveColor = $fragment->decorationColor |
| 5641 | ?? $fragment->textColor |
| 5642 | ?? $decoColor; |
| 5643 | foreach ($lines as $lineKind) { |
| 5644 | $offsetY = match ($lineKind) { |
| 5645 | 'underline' => $underlineOffset + ($explicitUnderlineOffset ?? 0.0), |
| 5646 | 'overline' => -$ascent, |
| 5647 | // The offset is the band's TOP, so centring a |
| 5648 | // line-through on the x-height middle means lifting |
| 5649 | // it by half its own thickness — otherwise a thick |
| 5650 | // line drifts downward off the glyphs. |
| 5651 | 'line-through' => -0.3 * $fontSize - $thickness / 2.0, |
| 5652 | default => 0.0, |
| 5653 | }; |
| 5654 | $layoutY = $baselineY + $offsetY; |
| 5655 | $pdfY = $this->pageHeight - $layoutY - $thickness; |
| 5656 | $this->emitDecorationStyled($stream, $x, $pdfY, $width, $thickness, $effectiveColor, $style); |
| 5657 | } |
| 5658 | } |
| 5659 | } |
| 5660 | |
| 5661 | /** |
| 5662 | * Emit one text-decoration line in the given style. `solid` is one |
| 5663 | * rect; `double` is two parallel rects with a small gap; `dashed` |
| 5664 | * and `dotted` emit a series of segment rects; `wavy` strokes a |
| 5665 | * cubic-Bezier-approximated sine wave at the decoration position. |
| 5666 | */ |
| 5667 | private function emitDecorationStyled( |
| 5668 | ContentStream $stream, |
| 5669 | float $x, |
| 5670 | float $pdfY, |
| 5671 | float $width, |
| 5672 | float $thickness, |
| 5673 | Color $color, |
| 5674 | string $style, |
| 5675 | ): void { |
| 5676 | if ($style === 'wavy') { |
| 5677 | $this->emitWavyDecoration($stream, $x, $pdfY, $width, $thickness, $color); |
| 5678 | return; |
| 5679 | } |
| 5680 | $stream->saveGraphicsState(); |
| 5681 | $stream->setFillColorRGB($color->r, $color->g, $color->b); |
| 5682 | switch ($style) { |
| 5683 | case 'double': |
| 5684 | $gap = max(0.5, $thickness); |
| 5685 | $stream->rectangle($x, $pdfY, $width, $thickness); |
| 5686 | $stream->rectangle($x, $pdfY - $gap - $thickness, $width, $thickness); |
| 5687 | $stream->fill(); |
| 5688 | break; |
| 5689 | case 'dashed': |
| 5690 | $segment = max(2.0, $thickness * 3); |
| 5691 | $gap = max(1.5, $thickness * 2); |
| 5692 | for ($cx = $x; $cx < $x + $width; $cx += $segment + $gap) { |
| 5693 | $w = min($segment, $x + $width - $cx); |
| 5694 | $stream->rectangle($cx, $pdfY, $w, $thickness); |
| 5695 | } |
| 5696 | $stream->fill(); |
| 5697 | break; |
| 5698 | case 'dotted': |
| 5699 | $dotSize = max(1.0, $thickness); |
| 5700 | $gap = $dotSize * 1.2; |
| 5701 | for ($cx = $x; $cx < $x + $width; $cx += $dotSize + $gap) { |
| 5702 | $w = min($dotSize, $x + $width - $cx); |
| 5703 | $stream->rectangle($cx, $pdfY, $w, $thickness); |
| 5704 | } |
| 5705 | $stream->fill(); |
| 5706 | break; |
| 5707 | default: // solid |
| 5708 | $stream->rectangle($x, $pdfY, $width, $thickness); |
| 5709 | $stream->fill(); |
| 5710 | } |
| 5711 | $stream->restoreGraphicsState(); |
| 5712 | } |
| 5713 | |
| 5714 | /** |
| 5715 | * Stroke a sine-wave-shaped text decoration line, approximated by |
| 5716 | * cubic Bezier curves. Two Beziers per period (one half-cycle up, |
| 5717 | * one half-cycle down). The wave's period is `thickness × 6` and |
| 5718 | * amplitude is `thickness × 0.7` — these tune the look to match |
| 5719 | * the wavy spell-check underlines that browsers render. |
| 5720 | */ |
| 5721 | private function emitWavyDecoration( |
| 5722 | ContentStream $stream, |
| 5723 | float $x, |
| 5724 | float $pdfY, |
| 5725 | float $width, |
| 5726 | float $thickness, |
| 5727 | Color $color, |
| 5728 | ): void { |
| 5729 | if ($width <= 0.0 || $thickness <= 0.0) { |
| 5730 | return; |
| 5731 | } |
| 5732 | $period = max(4.0, $thickness * 6.0); |
| 5733 | $amp = max(1.0, $thickness * 0.7); |
| 5734 | $strokeWidth = max(0.5, $thickness * 0.7); |
| 5735 | $stream->saveGraphicsState(); |
| 5736 | $stream->setStrokeColorRGB($color->r, $color->g, $color->b); |
| 5737 | $stream->setLineWidth($strokeWidth); |
| 5738 | // Centerline of the wave sits at $pdfY + thickness/2 so the |
| 5739 | // visible band stays within the decoration's allocated band. |
| 5740 | $centerY = $pdfY + $thickness / 2.0; |
| 5741 | $stream->moveTo($x, $centerY); |
| 5742 | $halfPeriod = $period / 2.0; |
| 5743 | // Bezier control offset for a sine half-cycle (well-known |
| 5744 | // approximation: control points at 1/3 and 2/3 of the half). |
| 5745 | $cx1Offset = $halfPeriod / 3.0; |
| 5746 | $cx2Offset = ($halfPeriod * 2.0) / 3.0; |
| 5747 | $end = $x + $width; |
| 5748 | $curX = $x; |
| 5749 | $up = true; |
| 5750 | while ($curX < $end) { |
| 5751 | $segmentEnd = min($curX + $halfPeriod, $end); |
| 5752 | $controlY = $up ? $centerY + $amp : $centerY - $amp; |
| 5753 | $stream->curveTo( |
| 5754 | $curX + $cx1Offset, |
| 5755 | $controlY, |
| 5756 | $curX + $cx2Offset, |
| 5757 | $controlY, |
| 5758 | $segmentEnd, |
| 5759 | $centerY, |
| 5760 | ); |
| 5761 | $curX = $segmentEnd; |
| 5762 | $up = !$up; |
| 5763 | } |
| 5764 | $stream->stroke(); |
| 5765 | $stream->restoreGraphicsState(); |
| 5766 | } |
| 5767 | |
| 5768 | /** |
| 5769 | * Resolve CSS Text Decoration 4 §4 `text-decoration-thickness`. |
| 5770 | * Returns the resolved pixel value when an explicit Length or |
| 5771 | * Percentage is set (percentage is relative to the font size per |
| 5772 | * CSS UI 4 §6); returns null when the value is `auto` so the font |
| 5773 | * metric stays in effect. |
| 5774 | */ |
| 5775 | private function resolveDecorationThickness(Box $box, float $fontSize): ?float |
| 5776 | { |
| 5777 | $value = $box->style->get('text-decoration-thickness'); |
| 5778 | if ($value instanceof \Phpdftk\Css\Value\Length) { |
| 5779 | return $value->value; |
| 5780 | } |
| 5781 | if ($value instanceof \Phpdftk\Css\Value\Percentage) { |
| 5782 | return $value->value / 100.0 * $fontSize; |
| 5783 | } |
| 5784 | return null; |
| 5785 | } |
| 5786 | |
| 5787 | /** |
| 5788 | * Resolve CSS Text Decoration 4 §4.2 `text-underline-offset`. |
| 5789 | * Positive values push the underline further below the baseline; |
| 5790 | * `auto` (null) defers to the font-metric default. |
| 5791 | */ |
| 5792 | private function resolveUnderlineOffset(Box $box, float $fontSize): ?float |
| 5793 | { |
| 5794 | $value = $box->style->get('text-underline-offset'); |
| 5795 | if ($value instanceof \Phpdftk\Css\Value\Length) { |
| 5796 | return $value->value; |
| 5797 | } |
| 5798 | if ($value instanceof \Phpdftk\Css\Value\Percentage) { |
| 5799 | return $value->value / 100.0 * $fontSize; |
| 5800 | } |
| 5801 | return null; |
| 5802 | } |
| 5803 | |
| 5804 | private function textDecorationStyle(Box $box): string |
| 5805 | { |
| 5806 | $value = $box->style->get('text-decoration-style'); |
| 5807 | if ($value instanceof Keyword) { |
| 5808 | $name = strtolower($value->name); |
| 5809 | if (in_array($name, ['solid', 'double', 'dashed', 'dotted', 'wavy'], true)) { |
| 5810 | return $name; |
| 5811 | } |
| 5812 | } |
| 5813 | return 'solid'; |
| 5814 | } |
| 5815 | |
| 5816 | /** @return list<string> */ |
| 5817 | private function textDecorationLines(Box $box): array |
| 5818 | { |
| 5819 | $value = $box->style->get('text-decoration-line'); |
| 5820 | if ($value === null) { |
| 5821 | return []; |
| 5822 | } |
| 5823 | $items = $value instanceof \Phpdftk\Css\Value\ValueList ? $value->values : [$value]; |
| 5824 | $out = []; |
| 5825 | foreach ($items as $item) { |
| 5826 | if (!$item instanceof Keyword) { |
| 5827 | continue; |
| 5828 | } |
| 5829 | $lower = strtolower($item->name); |
| 5830 | if ($lower === 'none' || $lower === 'blink') { |
| 5831 | continue; |
| 5832 | } |
| 5833 | if (in_array($lower, ['underline', 'overline', 'line-through'], true)) { |
| 5834 | $out[] = $lower; |
| 5835 | } |
| 5836 | } |
| 5837 | return $out; |
| 5838 | } |
| 5839 | |
| 5840 | private function textDecorationColor(Box $box, Color $fallback): Color |
| 5841 | { |
| 5842 | $value = $box->style->get('text-decoration-color'); |
| 5843 | return $value instanceof Color ? $value : $fallback; |
| 5844 | } |
| 5845 | |
| 5846 | private function paintFragment( |
| 5847 | Box $box, |
| 5848 | LineBox $line, |
| 5849 | InlineFragment $fragment, |
| 5850 | ContentStream $stream, |
| 5851 | Color $color, |
| 5852 | float $offsetX = 0.0, |
| 5853 | float $offsetY = 0.0, |
| 5854 | ): void { |
| 5855 | $shapedRun = $fragment->shapedRun; |
| 5856 | if ($shapedRun->glyphs === []) { |
| 5857 | return; |
| 5858 | } |
| 5859 | $font = $shapedRun->font; |
| 5860 | $ascent = ($font->ascent / max(1, $font->unitsPerEm)) * $shapedRun->fontSizePt; |
| 5861 | $x = $box->geometry->x + $fragment->x + $offsetX; |
| 5862 | // CSS2 §10.8 — every baseline-aligned fragment on the line shares the |
| 5863 | // line's single baseline (`line.baseline`, distance from line top), |
| 5864 | // so mixed-size runs line up instead of each sitting at its own |
| 5865 | // ascent. `baselineShift` layers `vertical-align: sub`/`super` (and, |
| 5866 | // later, the keyword offsets) on top; negative raises, positive |
| 5867 | // lowers. Add in layout-Y space, then flip to PDF-Y. |
| 5868 | $baselineY = $box->geometry->y + $line->y + $line->baseline + $offsetY + $fragment->baselineShift; |
| 5869 | $pdfY = $this->pageHeight - $baselineY; |
| 5870 | |
| 5871 | // Pick the RegisteredFont matching this fragment's shaped font. |
| 5872 | // The map is keyed by OpenType postScriptName; the shaping context |
| 5873 | // chose the font, so this lookup just hands the painter the right |
| 5874 | // PDF Tf resource. Falls back to defaultFont when the fragment's |
| 5875 | // font wasn't registered (e.g., the resolver returned defaultFont |
| 5876 | // and there's no alt map). |
| 5877 | $registered = $this->registeredFonts[$font->postScriptName] ?? $this->defaultFont; |
| 5878 | if ($registered === null) { |
| 5879 | // No registered Tf resource matches this fragment's font and |
| 5880 | // no default font is set either. Emitting a `Tf` op with a |
| 5881 | // bare postScriptName yields garbage in the viewer (some |
| 5882 | // fall back to an arbitrary font, others render nothing) — |
| 5883 | // both cases regress reftests that previously produced an |
| 5884 | // empty page. Skip the fragment instead. |
| 5885 | return; |
| 5886 | } |
| 5887 | $stream->setFont($registered, $shapedRun->fontSizePt); |
| 5888 | // Fake-italic via a 12° skew in the Tm `c` slot (≈ tan(12°) = 0.213). |
| 5889 | // CSS Fonts 4 §6.4.1 lets browsers synthesise oblique from regular |
| 5890 | // when no real italic face is registered; this is the same trick. |
| 5891 | $skew = $fragment->isItalic ? 0.213 : 0.0; |
| 5892 | // CSS Writing Modes 4 §5 — for vertical writing modes, |
| 5893 | // rotate the text matrix 90° clockwise so the line's |
| 5894 | // horizontal advance (text-space x) becomes a vertical |
| 5895 | // descent in PDF (page-space -y). Anchor at the line's |
| 5896 | // TOP-LEFT corner — `applyVerticalLineShift` placed every |
| 5897 | // line at y = 0 and shifted fragments along x to stack |
| 5898 | // lines as parallel columns right-to-left for vrl; the |
| 5899 | // anchor here matches that placement. |
| 5900 | $wm = WritingMode::fromStyle($box->style); |
| 5901 | if ($wm->isVertical()) { |
| 5902 | // The 90°-clockwise rotation maps the glyph's ascent to |
| 5903 | // +deviceX (physical right / line-over) and its descent to |
| 5904 | // -deviceX (physical left / line-under) for BOTH vertical-lr |
| 5905 | // and vertical-rl. The alphabetic drawing baseline therefore |
| 5906 | // sits a `descent` in from the column's line-under (left) |
| 5907 | // edge, centred inside the column's cross-size (its line box |
| 5908 | // extent) with symmetric half-leading — so the em box lands |
| 5909 | // centred in the column rather than flush to the left edge. |
| 5910 | $descent = (abs($font->descent) / max(1, $font->unitsPerEm)) * $shapedRun->fontSizePt; |
| 5911 | $halfLeading = max(0.0, ($line->height - ($ascent + $descent)) / 2.0); |
| 5912 | if ($wm->mode === WritingMode::SIDEWAYS_LR) { |
| 5913 | // CSS Writing Modes 4 §3.1 — `sideways-lr` is the one mode |
| 5914 | // whose inline axis runs BOTTOM-to-TOP. Its glyphs rotate 90° |
| 5915 | // COUNTER-clockwise, which puts the ascent on -deviceX |
| 5916 | // (physical left / line-over) and makes the run advance up |
| 5917 | // the page, starting at the line's inline-start edge: the |
| 5918 | // container's content BOTTOM, `blockOffset` in. |
| 5919 | $columnX = $box->geometry->x + $fragment->x + $offsetX + $halfLeading + $ascent; |
| 5920 | $runStartLayoutY = $box->geometry->y + $box->geometry->height |
| 5921 | - $line->y - $fragment->blockOffset + $offsetY; |
| 5922 | $stream->setTextMatrix( |
| 5923 | 0.0, |
| 5924 | 1.0, |
| 5925 | -1.0, |
| 5926 | 0.0, |
| 5927 | $columnX, |
| 5928 | $this->pageHeight - $runStartLayoutY, |
| 5929 | ); |
| 5930 | } else { |
| 5931 | $columnX = $box->geometry->x + $fragment->x + $offsetX + $halfLeading + $descent; |
| 5932 | // Increment 2: `blockOffset` places each fragment DOWN the |
| 5933 | // column by its original inline advance, so multiple |
| 5934 | // fragments in one source line stack vertically instead of |
| 5935 | // sharing the column top. |
| 5936 | $columnTopLayoutY = $box->geometry->y + $line->y + $offsetY + $fragment->blockOffset; |
| 5937 | $columnTopPdfY = $this->pageHeight - $columnTopLayoutY; |
| 5938 | $stream->setTextMatrix(0.0, -1.0, 1.0, 0.0, $columnX, $columnTopPdfY); |
| 5939 | } |
| 5940 | } else { |
| 5941 | // Tm reseats the text matrix at each fragment's left baseline, |
| 5942 | // which is simpler than tracking incremental Td offsets between |
| 5943 | // fragments. |
| 5944 | $stream->setTextMatrix(1, 0, $skew, 1, $x, $pdfY); |
| 5945 | } |
| 5946 | // Fake-bold via text rendering mode 2 (fill + stroke). Stroke |
| 5947 | // contributes ≈ fontSize × 0.04 of extra thickness — visually close |
| 5948 | // to the design-weight increment for bold. Match the stroke color |
| 5949 | // to the cascaded fill color so the bold outline doesn't bleed in a |
| 5950 | // different hue. Always re-emit the Tr so a non-bold fragment that |
| 5951 | // follows a bold one resets to fill-only. |
| 5952 | if ($color->a <= 0.0) { |
| 5953 | // CSS Color 4 — fully-transparent text (`color: transparent`, |
| 5954 | // alpha 0) paints no marks. `setFillColorRGB` drops alpha, so a |
| 5955 | // transparent colour reaches here as opaque black (rgb 0,0,0) |
| 5956 | // and would fill the glyphs solid. Switch to PDF text rendering |
| 5957 | // mode 3 (invisible): the glyphs still emit — so the text stays |
| 5958 | // extractable and contributes to the tagged-PDF structure — but |
| 5959 | // they leave no visible ink, matching how browsers print |
| 5960 | // transparent text. This is an extremely common WPT idiom |
| 5961 | // (Ahem "filler" text under `color: transparent`). |
| 5962 | $stream->setTextRenderingMode(3); |
| 5963 | } elseif ($fragment->isBold) { |
| 5964 | $stream->setStrokeColorRGB($color->r, $color->g, $color->b); |
| 5965 | $stream->setLineWidth($shapedRun->fontSizePt * 0.04); |
| 5966 | $stream->setTextRenderingMode(2); |
| 5967 | } else { |
| 5968 | $stream->setTextRenderingMode(0); |
| 5969 | } |
| 5970 | |
| 5971 | // Per-font GID translation: CFF subsetting renumbers glyphs in the |
| 5972 | // embedded font, so the shaper's full-font GIDs must be mapped to |
| 5973 | // the subset GIDs before emission. Each registered font has its |
| 5974 | // own gid map. |
| 5975 | $gidMap = $registered instanceof WriterFont |
| 5976 | ? $registered->getOldToNewGidMap() |
| 5977 | : []; |
| 5978 | $unitsPerEm = max(1, $font->unitsPerEm); |
| 5979 | $fontSize = $shapedRun->fontSizePt; |
| 5980 | |
| 5981 | // Build a TJ array if the shaper's advances diverge from the font's |
| 5982 | // natural hmtx widths — that gap is the kern adjustment to encode. |
| 5983 | // Otherwise emit a plain Tj for the whole run. |
| 5984 | $items = []; |
| 5985 | $hex = ''; |
| 5986 | $hasKern = false; |
| 5987 | foreach ($shapedRun->glyphs as $g) { |
| 5988 | $emitted = $gidMap[$g->glyphId] ?? $g->glyphId; |
| 5989 | $hex .= sprintf('%04X', $emitted); |
| 5990 | |
| 5991 | $natural = ($font->glyphWidths[$g->glyphId] ?? 0) / $unitsPerEm * $fontSize; |
| 5992 | $delta = $natural - $g->advanceX; // positive = shaper pulled the glyph in (kern) |
| 5993 | // CSS Fonts 4 §3.5: `font-size: 0` is legal — the glyphs |
| 5994 | // still emit, but at zero advance. Skip the kern fixup so |
| 5995 | // we don't divide by zero; nothing to nudge in PDF text |
| 5996 | // space when each glyph already advances 0. |
| 5997 | $kern = $fontSize > 0.0 ? $delta * 1000.0 / $fontSize : 0.0; |
| 5998 | if (abs($kern) >= 0.5) { |
| 5999 | $items[] = $hex; |
| 6000 | $items[] = $this->snapKern($kern); |
| 6001 | $hex = ''; |
| 6002 | $hasKern = true; |
| 6003 | } |
| 6004 | } |
| 6005 | if ($hex !== '') { |
| 6006 | $items[] = $hex; |
| 6007 | } |
| 6008 | |
| 6009 | if ($hasKern) { |
| 6010 | $stream->showTextArrayHex($items); |
| 6011 | } else { |
| 6012 | $stream->showTextHex(implode('', array_filter($items, 'is_string'))); |
| 6013 | } |
| 6014 | |
| 6015 | // Inline `<a href>` — record the fragment's rect for /Link emission. |
| 6016 | // We only collect on the "real text" pass (offsetX / offsetY == 0) |
| 6017 | // so multi-layer text-shadow doesn't multiply the link count. |
| 6018 | if ($fragment->href !== null && $offsetX === 0.0 && $offsetY === 0.0) { |
| 6019 | $descent = abs($font->descent) / max(1, $unitsPerEm) * $fontSize; |
| 6020 | $this->collectedLinks[] = [ |
| 6021 | 'href' => $fragment->href, |
| 6022 | 'llx' => $x, |
| 6023 | 'lly' => $pdfY - $descent, |
| 6024 | 'urx' => $x + $fragment->width, |
| 6025 | 'ury' => $pdfY + $ascent, |
| 6026 | 'title' => $fragment->linkTitle, |
| 6027 | ]; |
| 6028 | } |
| 6029 | } |
| 6030 | |
| 6031 | /** |
| 6032 | * Block-level `<a href>` — emit a single link rect covering the box's |
| 6033 | * border box. Inline `<a>` is handled inside {@see paintFragment()}. |
| 6034 | */ |
| 6035 | private function collectBlockLinkRect(Box $box): void |
| 6036 | { |
| 6037 | if ($box->element === null |
| 6038 | || strtolower($box->element->localName) !== 'a' |
| 6039 | ) { |
| 6040 | return; |
| 6041 | } |
| 6042 | $href = $box->element->getAttribute('href'); |
| 6043 | if ($href === null || $href === '') { |
| 6044 | return; |
| 6045 | } |
| 6046 | // Inline `<a>` already produces per-fragment rects via paintFragment; |
| 6047 | // skip when there's nothing to do at the block level. |
| 6048 | if (!($box instanceof \Phpdftk\HtmlToPdf\Box\BlockBox) |
| 6049 | && !($box instanceof \Phpdftk\HtmlToPdf\Box\AnonymousBlockBox) |
| 6050 | && !($box instanceof \Phpdftk\HtmlToPdf\Box\AtomicInlineBox) |
| 6051 | ) { |
| 6052 | return; |
| 6053 | } |
| 6054 | $g = $box->geometry; |
| 6055 | if ($g->width <= 0.0 || $g->outerHeight() <= 0.0) { |
| 6056 | return; |
| 6057 | } |
| 6058 | $llx = $g->x; |
| 6059 | $urx = $g->x + $g->width; |
| 6060 | $ury = $this->pageHeight - $g->y; |
| 6061 | $lly = $this->pageHeight - ($g->y + $g->outerHeight()); |
| 6062 | $this->collectedLinks[] = [ |
| 6063 | 'href' => $href, |
| 6064 | 'llx' => $llx, |
| 6065 | 'lly' => $lly, |
| 6066 | 'urx' => $urx, |
| 6067 | 'ury' => $ury, |
| 6068 | 'title' => $box->element->getAttribute('title'), |
| 6069 | ]; |
| 6070 | } |
| 6071 | |
| 6072 | /** |
| 6073 | * Round to the nearest 0.1 unit so the emitted PDF stays compact. |
| 6074 | * PDF readers don't visually distinguish sub-tenth-unit kerns. |
| 6075 | */ |
| 6076 | private function snapKern(float $kern): float|int |
| 6077 | { |
| 6078 | $rounded = round($kern, 1); |
| 6079 | return $rounded == (int) $rounded ? (int) $rounded : $rounded; |
| 6080 | } |
| 6081 | |
| 6082 | private function paintBackground(Box $box, ContentStream $stream): void |
| 6083 | { |
| 6084 | // Inline-level backgrounds (InlineBox, TextBox, LineBreakBox) are |
| 6085 | // painted per-fragment by {@see paintInlineBackgrounds()}; their |
| 6086 | // own geometry is meaningless for block-style background painting |
| 6087 | // (layout doesn't size them as a single rect). AtomicInlineBox / |
| 6088 | // BlockBox / AnonymousBlockBox keep the block-style fill. |
| 6089 | if ($box instanceof \Phpdftk\HtmlToPdf\Box\InlineBox |
| 6090 | || $box instanceof \Phpdftk\HtmlToPdf\Box\TextBox |
| 6091 | || $box instanceof \Phpdftk\HtmlToPdf\Box\LineBreakBox |
| 6092 | ) { |
| 6093 | return; |
| 6094 | } |
| 6095 | // CSS Backgrounds 3 §3.11.2 — the background-source box (root, |
| 6096 | // or the body when the root is transparent) was already painted |
| 6097 | // across the entire canvas before the tree walk; skip its own |
| 6098 | // per-box paint to avoid double-fill. |
| 6099 | if ($box === $this->propagatedBgBox) { |
| 6100 | return; |
| 6101 | } |
| 6102 | $color = $this->resolveColorWithCurrentColor( |
| 6103 | $box->style->get('background-color'), |
| 6104 | $box, |
| 6105 | ); |
| 6106 | // CSS Backgrounds 3 §2.1 — `background-image` may resolve to a |
| 6107 | // comma-separated list of images (layers). The first-listed image |
| 6108 | // paints on top; later images paint below. Build the layer list |
| 6109 | // and reject any non-paintable entries (e.g. `none`). |
| 6110 | $bgImage = $box->style->get('background-image'); |
| 6111 | $layers = $this->extractBackgroundLayers($bgImage); |
| 6112 | $hasColor = $color instanceof Color && $color->a > 0.0; |
| 6113 | $hasAnyLayer = $layers !== []; |
| 6114 | if (!$hasColor && !$hasAnyLayer) { |
| 6115 | return; |
| 6116 | } |
| 6117 | $geo = $box->geometry; |
| 6118 | // CSS Backgrounds 3 §3.5 — `background-clip` controls which |
| 6119 | // box edge the background paint extends to. `border-box` |
| 6120 | // (initial) reaches the outer border edge; `padding-box` |
| 6121 | // stops at the inner border edge; `content-box` stays inside |
| 6122 | // padding. We honour all three keywords. |
| 6123 | $clip = $this->resolveBackgroundClip($box); |
| 6124 | switch ($clip) { |
| 6125 | case 'content-box': |
| 6126 | $x = $geo->x; |
| 6127 | $top = $geo->y; |
| 6128 | $width = $geo->width; |
| 6129 | $height = $geo->height; |
| 6130 | break; |
| 6131 | case 'padding-box': |
| 6132 | $x = $geo->x - $geo->paddingLeft; |
| 6133 | $top = $geo->y - $geo->paddingTop; |
| 6134 | $width = $geo->paddingLeft + $geo->width + $geo->paddingRight; |
| 6135 | $height = $geo->paddingTop + $geo->height + $geo->paddingBottom; |
| 6136 | break; |
| 6137 | default: // 'border-box' or 'border-area' — both use border-box dims as the bounding rect |
| 6138 | $x = $geo->x - $geo->paddingLeft - $geo->borderLeft; |
| 6139 | $top = $geo->y - $geo->paddingTop - $geo->borderTop; |
| 6140 | $width = $geo->paddingLeft + $geo->width + $geo->paddingRight |
| 6141 | + $geo->borderLeft + $geo->borderRight; |
| 6142 | $height = $geo->paddingTop + $geo->height + $geo->paddingBottom |
| 6143 | + $geo->borderTop + $geo->borderBottom; |
| 6144 | } |
| 6145 | if ($hasColor) { |
| 6146 | // Border radii resolve against the border box, then reduce inward |
| 6147 | // to the background-clip box (CSS Backgrounds 3 §5.3), so a |
| 6148 | // `padding-box` / `content-box` background rounds its (smaller) |
| 6149 | // corners rather than reusing the full border-box radius. |
| 6150 | $borderBoxW = $geo->paddingLeft + $geo->width + $geo->paddingRight |
| 6151 | + $geo->borderLeft + $geo->borderRight; |
| 6152 | $borderBoxH = $geo->paddingTop + $geo->height + $geo->paddingBottom |
| 6153 | + $geo->borderTop + $geo->borderBottom; |
| 6154 | $radii = $this->reduceRadiiToBox( |
| 6155 | $this->borderRadiiXY($box, $borderBoxW, $borderBoxH), |
| 6156 | $clip, |
| 6157 | $geo, |
| 6158 | ); |
| 6159 | // CSS Backgrounds 4 — `background-clip: border-area` |
| 6160 | // paints only on the border ring. Emit border-box rect |
| 6161 | // ∪ padding-box rect with the even-odd fill rule so the |
| 6162 | // inner padding-box is left unfilled (a ring of bg). |
| 6163 | // Radii are ignored on this branch — rounded-corner |
| 6164 | // ring support is a follow-up. |
| 6165 | if ($clip === 'border-area') { |
| 6166 | $padX = $geo->x - $geo->paddingLeft; |
| 6167 | $padTop = $geo->y - $geo->paddingTop; |
| 6168 | $padWidth = $geo->paddingLeft + $geo->width + $geo->paddingRight; |
| 6169 | $padHeight = $geo->paddingTop + $geo->height + $geo->paddingBottom; |
| 6170 | $outerPdfY = $this->pageHeight - $top - $height; |
| 6171 | $padPdfY = $this->pageHeight - $padTop - $padHeight; |
| 6172 | $stream->saveGraphicsState(); |
| 6173 | $stream->setFillColorRGB($color->r, $color->g, $color->b); |
| 6174 | $stream->rectangle($x, $outerPdfY, $width, $height); |
| 6175 | $stream->rectangle($padX, $padPdfY, $padWidth, $padHeight); |
| 6176 | $stream->fillEvenOdd(); |
| 6177 | $stream->restoreGraphicsState(); |
| 6178 | } elseif ($this->radiiAnyPositive($radii)) { |
| 6179 | $this->emitRoundedFill($stream, $x, $top, $width, $height, $radii, $color, $this->cornerShapes($box)); |
| 6180 | } else { |
| 6181 | $this->emitRect($stream, $x, $top, $width, $height, fill: $color); |
| 6182 | } |
| 6183 | } |
| 6184 | // All three image-class properties resolve against the same |
| 6185 | // bg-origin / bg-size / bg-position trio. Hoist once so the |
| 6186 | // gradient branches can reuse the rects computed for the |
| 6187 | // raster path. |
| 6188 | $needBgImageProps = $hasAnyLayer && $width > 0.0 && $height > 0.0; |
| 6189 | // CSS Backgrounds 4 §3.5 — `border-area` paints bg-image |
| 6190 | // ONLY inside the border ring. Wrap the image-paint cluster |
| 6191 | // in a graphics state + even-odd clip path so paint inside |
| 6192 | // the padding-box is masked off. Rectangle radii are still |
| 6193 | // a follow-up (the rounded-ring case needs Bezier path |
| 6194 | // intersection beyond the rect-only clip below). |
| 6195 | $needBorderAreaClip = $needBgImageProps && $clip === 'border-area'; |
| 6196 | if ($needBorderAreaClip) { |
| 6197 | $padX = $geo->x - $geo->paddingLeft; |
| 6198 | $padTop = $geo->y - $geo->paddingTop; |
| 6199 | $padWidth = $geo->paddingLeft + $geo->width + $geo->paddingRight; |
| 6200 | $padHeight = $geo->paddingTop + $geo->height + $geo->paddingBottom; |
| 6201 | $outerPdfYClip = $this->pageHeight - $top - $height; |
| 6202 | $padPdfYClip = $this->pageHeight - $padTop - $padHeight; |
| 6203 | $stream->saveGraphicsState(); |
| 6204 | $stream->rectangle($x, $outerPdfYClip, $width, $height); |
| 6205 | $stream->rectangle($padX, $padPdfYClip, $padWidth, $padHeight); |
| 6206 | $stream->clipEvenOdd(); |
| 6207 | $stream->endPath(); |
| 6208 | } |
| 6209 | if ($needBgImageProps) { |
| 6210 | // Per CSS 2.1 §14.2.1, when fewer values are supplied than |
| 6211 | // images the values cycle. Split each property into a comma |
| 6212 | // list and index modulo its length. |
| 6213 | $sizeList = $this->extractCommaList($box->style->get('background-size')); |
| 6214 | $positionList = $this->extractCommaList($box->style->get('background-position')); |
| 6215 | $repeatList = $this->extractCommaList($box->style->get('background-repeat')); |
| 6216 | $originRect = $this->backgroundOriginRect( |
| 6217 | $box, |
| 6218 | $this->resolveBackgroundOrigin($box), |
| 6219 | ); |
| 6220 | // CSS Backgrounds 3 §3.10 — first-listed image is topmost; |
| 6221 | // walk the layer list in reverse so the topmost ends up |
| 6222 | // painted last. |
| 6223 | $count = count($layers); |
| 6224 | for ($i = $count - 1; $i >= 0; $i--) { |
| 6225 | $layer = $layers[$i]; |
| 6226 | $sizeValue = $sizeList === [] ? null : $sizeList[$i % count($sizeList)]; |
| 6227 | $positionValue = $positionList === [] ? null : $positionList[$i % count($positionList)]; |
| 6228 | $repeatValue = $repeatList === [] ? null : $repeatList[$i % count($repeatList)]; |
| 6229 | if ($layer instanceof \Phpdftk\Css\Value\Url) { |
| 6230 | $this->paintBackgroundImage( |
| 6231 | $layer, |
| 6232 | $stream, |
| 6233 | $x, |
| 6234 | $top, |
| 6235 | $width, |
| 6236 | $height, |
| 6237 | $sizeValue, |
| 6238 | $positionValue, |
| 6239 | $repeatValue, |
| 6240 | $originRect, |
| 6241 | ); |
| 6242 | } elseif ($layer instanceof \Phpdftk\Css\Value\LinearGradient) { |
| 6243 | if ($this->isDefaultGradientSize($sizeValue)) { |
| 6244 | $this->paintLinearGradient($layer, $stream, $x, $top, $width, $height); |
| 6245 | } else { |
| 6246 | // Non-default `background-size` tiles the gradient |
| 6247 | // across the box per `background-repeat` (no-repeat |
| 6248 | // reduces to one positioned tile). |
| 6249 | $this->paintTiledLinearGradient( |
| 6250 | $layer, |
| 6251 | $stream, |
| 6252 | $x, |
| 6253 | $top, |
| 6254 | $width, |
| 6255 | $height, |
| 6256 | $originRect, |
| 6257 | $sizeValue, |
| 6258 | $positionValue, |
| 6259 | $repeatValue, |
| 6260 | ); |
| 6261 | } |
| 6262 | } elseif ($layer instanceof \Phpdftk\Css\Value\RadialGradient) { |
| 6263 | // A non-default `background-size` tiles the gradient into |
| 6264 | // cells; we tile linear gradients (above) but not radial |
| 6265 | // yet — a radial with translucent stops (the common tiled |
| 6266 | // case) still floods rather than fades, so painting the |
| 6267 | // tiled grid would unmask worse than skipping. Paint the |
| 6268 | // single box-filling gradient only at the default size. |
| 6269 | if ($this->isDefaultGradientSize($sizeValue)) { |
| 6270 | $this->paintRadialGradient($layer, $stream, $x, $top, $width, $height); |
| 6271 | } |
| 6272 | } elseif ($layer instanceof \Phpdftk\Css\Value\ConicGradient) { |
| 6273 | $this->paintConicGradient($layer, $stream, $x, $top, $width, $height); |
| 6274 | } elseif (($imgArg = $this->imageFunctionColorArg($layer)) !== null) { |
| 6275 | $imgColor = $this->resolveColorWithCurrentColor($imgArg, $box); |
| 6276 | if ($imgColor instanceof Color) { |
| 6277 | $this->paintColorImage($stream, $imgColor, $sizeValue, $positionValue, $repeatValue, $x, $top, $width, $height, $originRect); |
| 6278 | } |
| 6279 | } |
| 6280 | } |
| 6281 | } |
| 6282 | if ($needBorderAreaClip) { |
| 6283 | $stream->restoreGraphicsState(); |
| 6284 | } |
| 6285 | } |
| 6286 | |
| 6287 | /** |
| 6288 | * Flatten a `background-image` value into the list of paintable |
| 6289 | * layers (Url / LinearGradient / RadialGradient). A bare value |
| 6290 | * becomes a single-element list; a comma-separated `ValueList` |
| 6291 | * is expanded. `none` keywords and other unsupported entries |
| 6292 | * are skipped. |
| 6293 | * |
| 6294 | * @return list<\Phpdftk\Css\Value\Url|\Phpdftk\Css\Value\LinearGradient|\Phpdftk\Css\Value\RadialGradient|\Phpdftk\Css\Value\ConicGradient|\Phpdftk\Css\Value\CssFunction> |
| 6295 | */ |
| 6296 | private function extractBackgroundLayers(mixed $value): array |
| 6297 | { |
| 6298 | if ($value instanceof \Phpdftk\Css\Value\ValueList |
| 6299 | && $value->separator === \Phpdftk\Css\Value\ListSeparator::Comma |
| 6300 | ) { |
| 6301 | $layers = []; |
| 6302 | foreach ($value->values as $v) { |
| 6303 | $layer = $this->resolveBackgroundLayer($v); |
| 6304 | if ($layer !== null) { |
| 6305 | $layers[] = $layer; |
| 6306 | } |
| 6307 | } |
| 6308 | return $layers; |
| 6309 | } |
| 6310 | $layer = $this->resolveBackgroundLayer($value); |
| 6311 | return $layer !== null ? [$layer] : []; |
| 6312 | } |
| 6313 | |
| 6314 | /** |
| 6315 | * Classify a single `background-image` list entry into the paintable |
| 6316 | * layer value the painter understands, or null when it's not one we |
| 6317 | * render. `image-set()` is unwrapped to its selected option's image |
| 6318 | * (CSS Images 4 §6) so a gradient / url wrapped in `image-set()` |
| 6319 | * paints identically to the bare image. |
| 6320 | * |
| 6321 | * @return \Phpdftk\Css\Value\Url|\Phpdftk\Css\Value\LinearGradient|\Phpdftk\Css\Value\RadialGradient|\Phpdftk\Css\Value\ConicGradient|\Phpdftk\Css\Value\CssFunction|null |
| 6322 | */ |
| 6323 | private function resolveBackgroundLayer(mixed $value): ?\Phpdftk\Css\Value\Value |
| 6324 | { |
| 6325 | if ($value instanceof \Phpdftk\Css\Value\ImageSet) { |
| 6326 | $value = $this->selectImageSetOption($value); |
| 6327 | } |
| 6328 | // A bare-string `image-set()` option — `image-set("/img.png" 1x)` — |
| 6329 | // selects a StringValue whose <string> is equivalent to url() per |
| 6330 | // CSS Images 4 §6. Map it to a Url so it paints like the wrapped form. |
| 6331 | // (A StringValue can only reach here via the image-set unwrap above; |
| 6332 | // a top-level `background-image: "string"` is invalid and never yields |
| 6333 | // a bare StringValue layer.) |
| 6334 | if ($value instanceof \Phpdftk\Css\Value\StringValue) { |
| 6335 | $value = new \Phpdftk\Css\Value\Url($value->value); |
| 6336 | } |
| 6337 | if ($value instanceof \Phpdftk\Css\Value\Url |
| 6338 | || $value instanceof \Phpdftk\Css\Value\LinearGradient |
| 6339 | || $value instanceof \Phpdftk\Css\Value\RadialGradient |
| 6340 | || $value instanceof \Phpdftk\Css\Value\ConicGradient |
| 6341 | || ($value instanceof \Phpdftk\Css\Value\CssFunction |
| 6342 | && $this->imageFunctionColorArg($value) !== null) |
| 6343 | ) { |
| 6344 | return $value; |
| 6345 | } |
| 6346 | return null; |
| 6347 | } |
| 6348 | |
| 6349 | /** |
| 6350 | * Pick the {@see \Phpdftk\Css\Value\ImageSetOption} that best matches |
| 6351 | * the print target (1 device-pixel-per-CSS-pixel). Prefers the entry |
| 6352 | * whose resolution is closest to 1x; a missing resolution counts as |
| 6353 | * 1x. Returns the option's image, or null for an empty set. |
| 6354 | */ |
| 6355 | private function selectImageSetOption(\Phpdftk\Css\Value\ImageSet $set): ?\Phpdftk\Css\Value\Value |
| 6356 | { |
| 6357 | // CSS Images 4 §6: before choosing, remove every option that names an |
| 6358 | // unknown/unsupported MIME type in its `type()` hint or carries a |
| 6359 | // non-positive resolution. If none survive, the image-set() resolves |
| 6360 | // to no image (paints nothing) — the function stays valid, so it still |
| 6361 | // wins the cascade over an earlier `background-image`. |
| 6362 | $best = null; |
| 6363 | $bestDelta = null; |
| 6364 | foreach ($set->options as $option) { |
| 6365 | if ($option->mimeType !== null |
| 6366 | && !self::isSupportedImageSetMimeType($option->mimeType) |
| 6367 | ) { |
| 6368 | continue; |
| 6369 | } |
| 6370 | if ($option->resolutionDppx !== null && $option->resolutionDppx <= 0.0) { |
| 6371 | continue; |
| 6372 | } |
| 6373 | $delta = abs(($option->resolutionDppx ?? 1.0) - 1.0); |
| 6374 | if ($bestDelta === null || $delta < $bestDelta) { |
| 6375 | $best = $option; |
| 6376 | $bestDelta = $delta; |
| 6377 | } |
| 6378 | } |
| 6379 | return $best?->image; |
| 6380 | } |
| 6381 | |
| 6382 | /** |
| 6383 | * Whether an `image-set()` `type()` MIME hint names an image format the |
| 6384 | * renderer can plausibly decode (CSS Images 4 §6 — options with an |
| 6385 | * unknown/unsupported type are removed from the set). The allowlist mirrors |
| 6386 | * the formats {@see \Phpdftk\ImageMetadata} recognises plus common raster |
| 6387 | * aliases; any non-image or invented subtype (e.g. `image/unsupported`) is |
| 6388 | * treated as unsupported. |
| 6389 | */ |
| 6390 | private static function isSupportedImageSetMimeType(string $mime): bool |
| 6391 | { |
| 6392 | return in_array(strtolower(trim($mime)), [ |
| 6393 | 'image/png', 'image/apng', 'image/jpeg', 'image/jpg', 'image/pjpeg', |
| 6394 | 'image/gif', 'image/webp', 'image/svg+xml', 'image/bmp', 'image/tiff', |
| 6395 | 'image/x-icon', 'image/vnd.microsoft.icon', 'image/avif', 'image/jp2', |
| 6396 | ], true); |
| 6397 | } |
| 6398 | |
| 6399 | private function imageFunctionColorArg(mixed $value): ?\Phpdftk\Css\Value\Value |
| 6400 | { |
| 6401 | if (!($value instanceof \Phpdftk\Css\Value\CssFunction) |
| 6402 | || strtolower($value->name) !== 'image' |
| 6403 | ) { |
| 6404 | return null; |
| 6405 | } |
| 6406 | foreach ($value->arguments as $arg) { |
| 6407 | if ($arg instanceof \Phpdftk\Css\Value\Url) { |
| 6408 | return null; // url-primary image() — not a solid colour. |
| 6409 | } |
| 6410 | if ($arg instanceof Color) { |
| 6411 | return $arg; |
| 6412 | } |
| 6413 | // `image(currentcolor)` resolves against the element's `color` |
| 6414 | // at paint time (via resolveColorWithCurrentColor). |
| 6415 | if ($arg instanceof Keyword && strtolower($arg->name) === 'currentcolor') { |
| 6416 | return $arg; |
| 6417 | } |
| 6418 | } |
| 6419 | return null; |
| 6420 | } |
| 6421 | |
| 6422 | /** |
| 6423 | * @param array{x: float, top: float, width: float, height: float} $originRect |
| 6424 | */ |
| 6425 | private function paintColorImage( |
| 6426 | ContentStream $stream, |
| 6427 | Color $color, |
| 6428 | ?\Phpdftk\Css\Value\Value $sizeValue, |
| 6429 | ?\Phpdftk\Css\Value\Value $positionValue, |
| 6430 | ?\Phpdftk\Css\Value\Value $repeatValue, |
| 6431 | float $x, |
| 6432 | float $top, |
| 6433 | float $width, |
| 6434 | float $height, |
| 6435 | array $originRect, |
| 6436 | ): void { |
| 6437 | if ($color->a <= 0.0) { |
| 6438 | return; |
| 6439 | } |
| 6440 | $ow = $originRect['width']; |
| 6441 | $oh = $originRect['height']; |
| 6442 | $size = $this->resolveBackgroundSize($sizeValue, '', $ow, $oh); |
| 6443 | $tw = $size['w']; |
| 6444 | $th = $size['h']; |
| 6445 | if ($tw <= 0.0 || $th <= 0.0) { |
| 6446 | return; |
| 6447 | } |
| 6448 | if ($positionValue !== null) { |
| 6449 | $pos = $this->resolveBackgroundPosition($positionValue, $tw, $th, $ow, $oh); |
| 6450 | $offX = $pos['offsetX']; |
| 6451 | $offY = $pos['offsetY']; |
| 6452 | } else { |
| 6453 | $offX = $size['offsetX']; |
| 6454 | $offY = $size['offsetY']; |
| 6455 | } |
| 6456 | $repeat = $this->repeatAxes($repeatValue); |
| 6457 | $rx = $repeat['x'] ? $x : $originRect['x'] + $offX; |
| 6458 | $rw = $repeat['x'] ? $width : $tw; |
| 6459 | $ry = $repeat['y'] ? $top : $originRect['top'] + $offY; |
| 6460 | $rh = $repeat['y'] ? $height : $th; |
| 6461 | $stream->saveGraphicsState(); |
| 6462 | $stream->rectangle($x, $this->pageHeight - $top - $height, $width, $height); |
| 6463 | $stream->clip(); |
| 6464 | $stream->endPath(); |
| 6465 | $this->emitRect($stream, $rx, $ry, $rw, $rh, fill: $color); |
| 6466 | $stream->restoreGraphicsState(); |
| 6467 | } |
| 6468 | |
| 6469 | /** |
| 6470 | * Split a CSS property value into a list of per-layer values. A |
| 6471 | * comma `ValueList` is exploded into its components; any other |
| 6472 | * value is wrapped in a single-element list. Null inputs return |
| 6473 | * an empty list so the caller can detect "no value supplied". |
| 6474 | * |
| 6475 | * @return list<\Phpdftk\Css\Value\Value> |
| 6476 | */ |
| 6477 | private function extractCommaList(mixed $value): array |
| 6478 | { |
| 6479 | if (!$value instanceof \Phpdftk\Css\Value\Value) { |
| 6480 | return []; |
| 6481 | } |
| 6482 | if ($value instanceof \Phpdftk\Css\Value\ValueList |
| 6483 | && $value->separator === \Phpdftk\Css\Value\ListSeparator::Comma |
| 6484 | ) { |
| 6485 | return array_values($value->values); |
| 6486 | } |
| 6487 | return [$value]; |
| 6488 | } |
| 6489 | |
| 6490 | /** |
| 6491 | * Paint a CSS `radial-gradient([<shape> <size>] [at <position>], <stops>)` |
| 6492 | * as the box's background. Phase-1 simplification: only the first |
| 6493 | * and last stops are honoured (PDF's basic ShadingType3 is two-stop), |
| 6494 | * the box centre is used when no `at <position>` is supplied, and |
| 6495 | * `circle` shapes default to half the box's smaller side while |
| 6496 | * `ellipse` shapes get half the box's dimensions per axis. |
| 6497 | * |
| 6498 | * Because PDF's radial shading is a *circular* primitive, ellipse |
| 6499 | * gradients are approximated by scaling the user-space matrix so a |
| 6500 | * unit circle becomes an ellipse — the gradient still expands |
| 6501 | * outward proportionally. |
| 6502 | */ |
| 6503 | /** |
| 6504 | * CSS Images 4 §3.5 — paint a `conic-gradient()` over the box rect. |
| 6505 | * PDF has no angular shading, so this routes through a function-based |
| 6506 | * ShadingType-1 whose PostScript calculator maps each point to its |
| 6507 | * sweep angle and interpolates the stops |
| 6508 | * ({@see \Phpdftk\Pdf\Writer\PdfDoc::addConicShadingStops()}). |
| 6509 | */ |
| 6510 | private function paintConicGradient( |
| 6511 | \Phpdftk\Css\Value\ConicGradient $gradient, |
| 6512 | ContentStream $stream, |
| 6513 | float $x, |
| 6514 | float $top, |
| 6515 | float $width, |
| 6516 | float $height, |
| 6517 | ): void { |
| 6518 | if ($gradient->stops === []) { |
| 6519 | return; |
| 6520 | } |
| 6521 | if (count($gradient->stops) === 1) { |
| 6522 | $this->fillGradientSolidStop($gradient->stops[0], $stream, $x, $top, $width, $height); |
| 6523 | return; |
| 6524 | } |
| 6525 | if ($this->writer === null || $this->page === null) { |
| 6526 | return; |
| 6527 | } |
| 6528 | if ($width <= 0.0 || $height <= 0.0) { |
| 6529 | return; |
| 6530 | } |
| 6531 | $pdfY = $this->pageHeight - $top - $height; |
| 6532 | // Centre: `at <position>` fractions (default 50% 50%). centerY is |
| 6533 | // measured from the CSS top, so flip into the PDF y-up box. |
| 6534 | $cx = $x + ($gradient->centerX ?? 0.5) * $width; |
| 6535 | $cy = $pdfY + ($height - ($gradient->centerY ?? 0.5) * $height); |
| 6536 | // Conic stop positions are angular percentages of the full sweep, |
| 6537 | // so they resolve to [0,1] offsets directly (length line = 1). |
| 6538 | $stopList = $this->resolveGradientStops($gradient->stops, 1.0); |
| 6539 | if (count($stopList) < 2) { |
| 6540 | return; |
| 6541 | } |
| 6542 | try { |
| 6543 | $doc = \Phpdftk\Pdf\Writer\PdfDoc::wrap($this->writer); |
| 6544 | $pattern = $doc->addConicShadingStops( |
| 6545 | new \Phpdftk\Geometry\Point($cx, $cy), |
| 6546 | $gradient->fromAngleDeg, |
| 6547 | $stopList, |
| 6548 | [$x, $x + $width, $pdfY, $pdfY + $height], |
| 6549 | $gradient->repeating, |
| 6550 | ); |
| 6551 | } catch (\Throwable) { |
| 6552 | return; |
| 6553 | } |
| 6554 | $patternName = $this->page->useGradient($pattern); |
| 6555 | $stream->saveGraphicsState(); |
| 6556 | $stream->rectangle($x, $pdfY, $width, $height); |
| 6557 | $stream->clip(); |
| 6558 | $stream->endPath(); |
| 6559 | $stream->setFillColorSpace('Pattern'); |
| 6560 | $stream->setFillColor($patternName); |
| 6561 | $stream->rectangle($x, $pdfY, $width, $height); |
| 6562 | $stream->fill(); |
| 6563 | $stream->restoreGraphicsState(); |
| 6564 | } |
| 6565 | |
| 6566 | private function paintRadialGradient( |
| 6567 | \Phpdftk\Css\Value\RadialGradient $gradient, |
| 6568 | ContentStream $stream, |
| 6569 | float $x, |
| 6570 | float $top, |
| 6571 | float $width, |
| 6572 | float $height, |
| 6573 | ): void { |
| 6574 | if ($gradient->stops === []) { |
| 6575 | return; |
| 6576 | } |
| 6577 | // CSS Images 3 §3.5.1 — single-stop gradient is a solid fill |
| 6578 | // (no PDF writer needed, so runs before the shading writer guard). |
| 6579 | if (count($gradient->stops) === 1) { |
| 6580 | $this->fillGradientSolidStop($gradient->stops[0], $stream, $x, $top, $width, $height); |
| 6581 | return; |
| 6582 | } |
| 6583 | if ($this->writer === null || $this->page === null) { |
| 6584 | return; |
| 6585 | } |
| 6586 | if ($width <= 0.0 || $height <= 0.0) { |
| 6587 | return; |
| 6588 | } |
| 6589 | $pdfY = $this->pageHeight - $top - $height; |
| 6590 | // Centre: default to the box centre when no `at <position>` is |
| 6591 | // supplied. Author-supplied length values resolve relative to |
| 6592 | // the box's content rect. centerY is measured from the CSS top, |
| 6593 | // so flip into the PDF y-up box. |
| 6594 | $cx = $x + ($gradient->centerX !== null ? $gradient->centerX->value : $width / 2); |
| 6595 | $cy = $pdfY + ($height - ($gradient->centerY !== null ? $gradient->centerY->value : $height / 2)); |
| 6596 | // Radii: prefer author lengths, otherwise default to the box |
| 6597 | // half-extent per axis. PDF's ShadingType-3 primitive is circular, |
| 6598 | // so we build a circle of radius r = max(rx, ry) and, for ellipses |
| 6599 | // (rx != ry), scale pattern space via the pattern /Matrix. |
| 6600 | // |
| 6601 | // A single authored `<length>` (`radial-gradient(25px …)`) is a |
| 6602 | // *circle* of that radius per CSS Images 3 §3.5.1 — an ellipse |
| 6603 | // needs two radii — so mirror sizeX onto the missing sizeY rather |
| 6604 | // than falling back to the box half-height (which would stretch |
| 6605 | // the circle into a tall ellipse). |
| 6606 | $rx = $gradient->sizeX !== null ? $gradient->sizeX->value : $width / 2; |
| 6607 | if ($gradient->sizeY !== null) { |
| 6608 | $ry = $gradient->sizeY->value; |
| 6609 | } elseif ($gradient->sizeX !== null) { |
| 6610 | $ry = $rx; |
| 6611 | } else { |
| 6612 | $ry = $height / 2; |
| 6613 | } |
| 6614 | if ($rx <= 0.0 || $ry <= 0.0) { |
| 6615 | return; |
| 6616 | } |
| 6617 | $r = max($rx, $ry); |
| 6618 | // For radial, the gradient line is from centre to the ending |
| 6619 | // shape — its length is the outer radius (the larger axis). |
| 6620 | $stopList = $this->resolveGradientStops($gradient->stops, $r, $gradient->interpolationSpace, $gradient->hueInterpolation); |
| 6621 | // Beyond the ending shape, CSS Images 3 §3.5.1 paints the last |
| 6622 | // stop's colour outward to the box edge. Extend the shading only |
| 6623 | // when that last stop is opaque: a translucent final stop (e.g. |
| 6624 | // `…, transparent`) must fade OUT rather than flood the box with |
| 6625 | // the stop's RGB — and PDF colour shadings carry no alpha, so |
| 6626 | // extending it would paint opaque black. Leaving extend off there |
| 6627 | // stops painting past the outer circle, which reads as the |
| 6628 | // intended transparency. (Full per-stop alpha is a later soft-mask |
| 6629 | // pass — see the note below.) |
| 6630 | $lastStop = $gradient->stops[count($gradient->stops) - 1]; |
| 6631 | $extend = $lastStop->color->a >= 1.0; |
| 6632 | // Build the concentric-circle shading in ABSOLUTE page coordinates |
| 6633 | // (inner radius 0, outer r at the box centre) with an identity |
| 6634 | // pattern matrix. A shading pattern anchors via its own /Matrix |
| 6635 | // relative to the page default coordinate system and IGNORES the |
| 6636 | // current CTM, so — like the linear path — we must place the |
| 6637 | // shading at real page coordinates rather than relying on |
| 6638 | // `concatMatrix`. (The old CTM-based placement left the shading at |
| 6639 | // the page origin, painting nothing.) |
| 6640 | try { |
| 6641 | $doc = \Phpdftk\Pdf\Writer\PdfDoc::wrap($this->writer); |
| 6642 | $pattern = $doc->addRadialGradientStops( |
| 6643 | new \Phpdftk\Geometry\Point($cx, $cy), |
| 6644 | 0.0, |
| 6645 | new \Phpdftk\Geometry\Point($cx, $cy), |
| 6646 | $r, |
| 6647 | $stopList, |
| 6648 | $extend, |
| 6649 | ); |
| 6650 | } catch (\Throwable) { |
| 6651 | return; |
| 6652 | } |
| 6653 | // Elliptical ending shape: scale pattern space about the centre so |
| 6654 | // the radius-r circle becomes an rx × ry ellipse. Scaling P about |
| 6655 | // C by s is P' = s·P + C(1−s); the pattern /Matrix carries that. |
| 6656 | if ($rx !== $ry) { |
| 6657 | $sx = $rx / $r; |
| 6658 | $sy = $ry / $r; |
| 6659 | $pattern->matrix = new \Phpdftk\Pdf\Core\PdfArray([ |
| 6660 | new \Phpdftk\Pdf\Core\PdfNumber($sx), |
| 6661 | new \Phpdftk\Pdf\Core\PdfNumber(0.0), |
| 6662 | new \Phpdftk\Pdf\Core\PdfNumber(0.0), |
| 6663 | new \Phpdftk\Pdf\Core\PdfNumber($sy), |
| 6664 | new \Phpdftk\Pdf\Core\PdfNumber($cx - $sx * $cx), |
| 6665 | new \Phpdftk\Pdf\Core\PdfNumber($cy - $sy * $cy), |
| 6666 | ]); |
| 6667 | } |
| 6668 | // NOTE: per-stop alpha is not yet honoured for radial gradients. |
| 6669 | // A Luminosity soft mask analogous to the linear path (see |
| 6670 | // {@see paintLinearGradient()}) would reuse the same absolute |
| 6671 | // anchoring; the writer primitive |
| 6672 | // ({@see \Phpdftk\Pdf\Writer\PdfDoc::addRadialAlphaShading()}) |
| 6673 | // exists for when that is wired up. |
| 6674 | $patternName = $this->page->useGradient($pattern); |
| 6675 | $stream->saveGraphicsState(); |
| 6676 | $stream->rectangle($x, $pdfY, $width, $height); |
| 6677 | $stream->clip(); |
| 6678 | $stream->endPath(); |
| 6679 | $stream->setFillColorSpace('Pattern'); |
| 6680 | $stream->setFillColor($patternName); |
| 6681 | $stream->rectangle($x, $pdfY, $width, $height); |
| 6682 | $stream->fill(); |
| 6683 | $stream->restoreGraphicsState(); |
| 6684 | } |
| 6685 | |
| 6686 | /** |
| 6687 | * CSS Images 3 §3.5.1 — paint a single-colour-stop gradient as a |
| 6688 | * solid rectangle fill of that stop's colour. `$top` / `$height` are |
| 6689 | * CSS coordinates (y down); flip to PDF space for the rectangle. |
| 6690 | */ |
| 6691 | private function fillGradientSolidStop( |
| 6692 | \Phpdftk\Css\Value\GradientStop $stop, |
| 6693 | ContentStream $stream, |
| 6694 | float $x, |
| 6695 | float $top, |
| 6696 | float $width, |
| 6697 | float $height, |
| 6698 | ): void { |
| 6699 | if ($width <= 0.0 || $height <= 0.0) { |
| 6700 | return; |
| 6701 | } |
| 6702 | $color = $stop->color; |
| 6703 | $stream->saveGraphicsState(); |
| 6704 | $stream->setFillColorRGB($color->r, $color->g, $color->b); |
| 6705 | $stream->rectangle($x, $this->pageHeight - $top - $height, $width, $height); |
| 6706 | $stream->fill(); |
| 6707 | $stream->restoreGraphicsState(); |
| 6708 | } |
| 6709 | |
| 6710 | /** |
| 6711 | * Normalise CSS gradient stops to PDF `{offset, rgb}` tuples per |
| 6712 | * CSS Images 3 §3.5.1: unspecified positions distribute evenly |
| 6713 | * between adjacent positioned stops; the first stop defaults to |
| 6714 | * offset 0 and the last to 1. After normalisation, offsets are |
| 6715 | * monotonically non-decreasing in [0, 1]. |
| 6716 | * |
| 6717 | * @param list<\Phpdftk\Css\Value\GradientStop> $stops |
| 6718 | * @param float $gradientLineLength Length of the gradient line in |
| 6719 | * user units. Used to convert `<length>` stop positions to |
| 6720 | * fractional [0, 1] offsets. Pass 0 to skip length-position |
| 6721 | * resolution (degrades length-positioned stops to "no authored |
| 6722 | * position" — the spec's interpolation algorithm fills them in). |
| 6723 | * @return list<array{offset: float, rgb: array{float, float, float}, alpha: float}> |
| 6724 | */ |
| 6725 | private function resolveGradientStops( |
| 6726 | array $stops, |
| 6727 | float $gradientLineLength = 0.0, |
| 6728 | ?ColorSpace $interpSpace = null, |
| 6729 | ?HueInterpolation $hueInterp = null, |
| 6730 | ): array { |
| 6731 | $count = count($stops); |
| 6732 | if ($count === 0) { |
| 6733 | return []; |
| 6734 | } |
| 6735 | // Step 1: pull positions where authored. `<percentage>` → |
| 6736 | // [0,1] fraction directly. `<length>` divides by the gradient |
| 6737 | // line length to get a fraction; when the line length is |
| 6738 | // unknown (0), length-positioned stops fall through to the |
| 6739 | // interpolation step like unset positions. |
| 6740 | $offsets = array_fill(0, $count, null); |
| 6741 | foreach ($stops as $i => $s) { |
| 6742 | if ($s->position instanceof \Phpdftk\Css\Value\Percentage) { |
| 6743 | $offsets[$i] = max(0.0, min(1.0, $s->position->value / 100.0)); |
| 6744 | } elseif ($s->position instanceof \Phpdftk\Css\Value\Length && $gradientLineLength > 0.0) { |
| 6745 | $offsets[$i] = max(0.0, min(1.0, $s->position->value / $gradientLineLength)); |
| 6746 | } |
| 6747 | } |
| 6748 | // Step 2: anchor unset endpoints at 0/1. |
| 6749 | if ($offsets[0] === null) { |
| 6750 | $offsets[0] = 0.0; |
| 6751 | } |
| 6752 | if ($offsets[$count - 1] === null) { |
| 6753 | $offsets[$count - 1] = 1.0; |
| 6754 | } |
| 6755 | // Step 3: monotonic clamp — each stop's offset must be ≥ the |
| 6756 | // previous stop's offset. |
| 6757 | $prev = 0.0; |
| 6758 | foreach ($offsets as $i => $o) { |
| 6759 | if ($o !== null) { |
| 6760 | $offsets[$i] = max($o, $prev); |
| 6761 | $prev = $offsets[$i]; |
| 6762 | } |
| 6763 | } |
| 6764 | // Step 4: linearly interpolate runs of unset offsets between |
| 6765 | // adjacent anchored stops. |
| 6766 | $i = 0; |
| 6767 | while ($i < $count) { |
| 6768 | if ($offsets[$i] !== null) { |
| 6769 | $i++; |
| 6770 | continue; |
| 6771 | } |
| 6772 | $start = $i - 1; |
| 6773 | $end = $i; |
| 6774 | while ($end < $count && $offsets[$end] === null) { |
| 6775 | $end++; |
| 6776 | } |
| 6777 | // $start ≥ 0 (anchored), $end < $count (anchored at last). |
| 6778 | $startOffset = $offsets[$start]; |
| 6779 | $endOffset = $offsets[$end]; |
| 6780 | $span = $endOffset - $startOffset; |
| 6781 | $gap = $end - $start; |
| 6782 | for ($j = $start + 1; $j < $end; $j++) { |
| 6783 | $offsets[$j] = $startOffset + $span * ($j - $start) / $gap; |
| 6784 | } |
| 6785 | $i = $end; |
| 6786 | } |
| 6787 | // Step 5: build entries carrying the authored Colour + resolved |
| 6788 | // offset (the colour is converted to sRGB — or resampled in the |
| 6789 | // interpolation space — in step 7). |
| 6790 | $entries = []; |
| 6791 | foreach ($stops as $i => $s) { |
| 6792 | $entries[] = ['offset' => (float) $offsets[$i], 'color' => $s->color]; |
| 6793 | } |
| 6794 | // Step 6: pad the ends so the stop list always spans [0, 1] with the |
| 6795 | // terminal colours held flat. CSS Images 3 §3.5.1 — before the first |
| 6796 | // stop the gradient is the first colour, after the last stop it is |
| 6797 | // the last colour. The PDF stitching function assumes its input runs |
| 6798 | // first-stop → last-stop, so a last stop authored at e.g. 70% (`…, |
| 6799 | // green 0` clamped up, or `…, green 70%`) would otherwise stretch |
| 6800 | // the final segment across the remaining 30% instead of holding a |
| 6801 | // solid band. Anchoring synthetic end stops keeps the colour flat. |
| 6802 | if ($entries[0]['offset'] > 0.0) { |
| 6803 | array_unshift($entries, ['offset' => 0.0, 'color' => $entries[0]['color']]); |
| 6804 | } |
| 6805 | $lastEntry = $entries[count($entries) - 1]; |
| 6806 | if ($lastEntry['offset'] < 1.0) { |
| 6807 | $entries[] = ['offset' => 1.0, 'color' => $lastEntry['color']]; |
| 6808 | } |
| 6809 | // Step 7: flatten to {offset, rgb, alpha}, resampling in the |
| 6810 | // interpolation space when the gradient names one. |
| 6811 | return $this->flattenGradientStops($entries, $interpSpace, $hueInterp); |
| 6812 | } |
| 6813 | |
| 6814 | /** |
| 6815 | * Flatten resolved stop entries to the `{offset, rgb, alpha}` tuples the |
| 6816 | * PDF writer consumes. Each colour is converted to sRGB. When `$space` |
| 6817 | * is an explicit interpolation space PDF cannot express natively (i.e. |
| 6818 | * anything but sRGB), each segment is densely resampled via |
| 6819 | * {@see ColorConverter::interpolate()} so the shading's linear DeviceRGB |
| 6820 | * interpolation between samples tracks the true in-space curve |
| 6821 | * (CSS Color 4 §12 / CSS Images 4 §3.1). Otherwise stops are emitted |
| 6822 | * verbatim and the shading interpolates them linearly — the default. |
| 6823 | * |
| 6824 | * @param list<array{offset: float, color: Color}> $entries |
| 6825 | * @return list<array{offset: float, rgb: array{float, float, float}, alpha: float}> |
| 6826 | */ |
| 6827 | private function flattenGradientStops(array $entries, ?ColorSpace $space, ?HueInterpolation $hue): array |
| 6828 | { |
| 6829 | if ($space === null || !$this->interpolationSpaceNeedsResample($space)) { |
| 6830 | $out = []; |
| 6831 | foreach ($entries as $e) { |
| 6832 | $c = ColorConverter::toSrgb($e['color']); |
| 6833 | $out[] = ['offset' => $e['offset'], 'rgb' => [$c->r, $c->g, $c->b], 'alpha' => $c->a]; |
| 6834 | } |
| 6835 | return $out; |
| 6836 | } |
| 6837 | $out = []; |
| 6838 | $n = count($entries); |
| 6839 | for ($k = 0; $k < $n - 1; $k++) { |
| 6840 | $a = $entries[$k]; |
| 6841 | $b = $entries[$k + 1]; |
| 6842 | if ($k === 0) { |
| 6843 | $ca = ColorConverter::toSrgb($a['color']); |
| 6844 | $out[] = ['offset' => $a['offset'], 'rgb' => [$ca->r, $ca->g, $ca->b], 'alpha' => $ca->a]; |
| 6845 | } |
| 6846 | $span = $b['offset'] - $a['offset']; |
| 6847 | if ($span > 1e-9) { |
| 6848 | $steps = $this->gradientSampleSteps($space, $hue); |
| 6849 | for ($m = 1; $m < $steps; $m++) { |
| 6850 | $t = $m / $steps; |
| 6851 | $ci = ColorConverter::interpolate($a['color'], $b['color'], $t, $space, $hue); |
| 6852 | $out[] = ['offset' => $a['offset'] + $span * $t, 'rgb' => [$ci->r, $ci->g, $ci->b], 'alpha' => $ci->a]; |
| 6853 | } |
| 6854 | } |
| 6855 | $cb = ColorConverter::toSrgb($b['color']); |
| 6856 | $out[] = ['offset' => $b['offset'], 'rgb' => [$cb->r, $cb->g, $cb->b], 'alpha' => $cb->a]; |
| 6857 | } |
| 6858 | return $out; |
| 6859 | } |
| 6860 | |
| 6861 | /** |
| 6862 | * Whether interpolating in `$space` requires pre-sampling. sRGB (and any |
| 6863 | * space without a forward conversion) matches PDF's native DeviceRGB |
| 6864 | * interpolation, so no resampling is needed. |
| 6865 | */ |
| 6866 | private function interpolationSpaceNeedsResample(ColorSpace $space): bool |
| 6867 | { |
| 6868 | return match ($space) { |
| 6869 | ColorSpace::OKLab, ColorSpace::OKLCH, ColorSpace::Lab, ColorSpace::Lch, |
| 6870 | ColorSpace::HSL, ColorSpace::HWB, ColorSpace::sRGBLinear, |
| 6871 | ColorSpace::XYZ, ColorSpace::XYZD65, ColorSpace::DisplayP3 => true, |
| 6872 | default => false, |
| 6873 | }; |
| 6874 | } |
| 6875 | |
| 6876 | /** |
| 6877 | * Samples per gradient segment when resampling in `$space`. Polar spaces |
| 6878 | * (hue channel) get more samples — and `longer`/`increasing`/`decreasing` |
| 6879 | * hue can traverse up to a full turn — so the piecewise-linear sRGB |
| 6880 | * approximation stays smooth. |
| 6881 | */ |
| 6882 | private function gradientSampleSteps(ColorSpace $space, ?HueInterpolation $hue): int |
| 6883 | { |
| 6884 | $isPolar = match ($space) { |
| 6885 | ColorSpace::OKLCH, ColorSpace::Lch, ColorSpace::HSL, ColorSpace::HWB => true, |
| 6886 | default => false, |
| 6887 | }; |
| 6888 | if (!$isPolar) { |
| 6889 | return 16; |
| 6890 | } |
| 6891 | return $hue === HueInterpolation::Longer |
| 6892 | || $hue === HueInterpolation::Increasing |
| 6893 | || $hue === HueInterpolation::Decreasing ? 64 : 32; |
| 6894 | } |
| 6895 | |
| 6896 | /** |
| 6897 | * True when any stop of a gradient carries alpha < 1 — the case a |
| 6898 | * plain PDF colour shading cannot express (shadings have no alpha |
| 6899 | * channel). Such gradients need a Luminosity soft mask built from |
| 6900 | * the per-stop alpha (see {@see applyGradientAlphaMask()}). |
| 6901 | * |
| 6902 | * @param list<\Phpdftk\Css\Value\GradientStop> $stops |
| 6903 | */ |
| 6904 | private function gradientHasAlpha(array $stops): bool |
| 6905 | { |
| 6906 | foreach ($stops as $s) { |
| 6907 | if ($s->color->a < 1.0) { |
| 6908 | return true; |
| 6909 | } |
| 6910 | } |
| 6911 | return false; |
| 6912 | } |
| 6913 | |
| 6914 | /** |
| 6915 | * Map a resolved stop list (offset + rgb + alpha) to the gray-stop |
| 6916 | * list {@see \Phpdftk\Pdf\Writer\PdfDoc::addLinearAlphaShading()} |
| 6917 | * consumes: gray = alpha, so the Luminosity mask is opaque where |
| 6918 | * the gradient is opaque and transparent where it is transparent. |
| 6919 | * |
| 6920 | * @param list<array{offset: float, rgb: array{float, float, float}, alpha: float}> $stopList |
| 6921 | * @return list<array{offset: float, gray: float}> |
| 6922 | */ |
| 6923 | private function alphaStopsFrom(array $stopList): array |
| 6924 | { |
| 6925 | $out = []; |
| 6926 | foreach ($stopList as $s) { |
| 6927 | $out[] = ['offset' => $s['offset'], 'gray' => $s['alpha']]; |
| 6928 | } |
| 6929 | return $out; |
| 6930 | } |
| 6931 | |
| 6932 | /** |
| 6933 | * Build a Luminosity soft-mask ExtGState carrying a gradient's |
| 6934 | * per-stop alpha and return its resource name (or null when the |
| 6935 | * mask can't be built). `$registerShading` registers the DeviceGray |
| 6936 | * alpha shading (linear or radial) on the PdfDoc and returns its |
| 6937 | * object number; the mask group paints it with `sh`, clipped to the |
| 6938 | * clip rect, in absolute page coordinates — a soft-mask group |
| 6939 | * inherits the CTM in effect when its `gs` is set, and the painter |
| 6940 | * paints gradients under an identity CTM. Emit `/<name> gs` inside |
| 6941 | * the gradient's save/restore scope before the pattern fill so the |
| 6942 | * alpha modulates the colour shading (ISO 32000-2 §11.6.5.2). |
| 6943 | * |
| 6944 | * @param \Closure(\Phpdftk\Pdf\Writer\PdfDoc): int $registerShading |
| 6945 | */ |
| 6946 | private function buildGradientAlphaMaskState( |
| 6947 | \Phpdftk\Pdf\Writer\PdfDoc $doc, |
| 6948 | \Closure $registerShading, |
| 6949 | float $clipX, |
| 6950 | float $clipPdfY, |
| 6951 | float $clipWidth, |
| 6952 | float $clipHeight, |
| 6953 | ): ?string { |
| 6954 | if ($this->page === null || $clipWidth <= 0.0 || $clipHeight <= 0.0) { |
| 6955 | return null; |
| 6956 | } |
| 6957 | try { |
| 6958 | $shadingObjNum = $registerShading($doc); |
| 6959 | $bbox = new \Phpdftk\Geometry\Rectangle($clipX, $clipPdfY, $clipWidth, $clipHeight); |
| 6960 | $group = $doc->createTransparencyGroup( |
| 6961 | $bbox, |
| 6962 | function ( |
| 6963 | ContentStream $cs, |
| 6964 | \Phpdftk\Pdf\Core\Content\Resources $res, |
| 6965 | ) use ($shadingObjNum, $clipX, $clipPdfY, $clipWidth, $clipHeight): void { |
| 6966 | $res->shading['Sh0'] = new \Phpdftk\Pdf\Core\PdfReference($shadingObjNum); |
| 6967 | $cs->rectangle($clipX, $clipPdfY, $clipWidth, $clipHeight); |
| 6968 | $cs->clip(); |
| 6969 | $cs->endPath(); |
| 6970 | $cs->paintShading('Sh0'); |
| 6971 | }, |
| 6972 | ); |
| 6973 | return $this->page->ensureSoftMaskState($group, 'Luminosity'); |
| 6974 | } catch (\Throwable) { |
| 6975 | return null; |
| 6976 | } |
| 6977 | } |
| 6978 | |
| 6979 | /** |
| 6980 | * Resolve the stop list of a `repeating-linear-gradient` to one |
| 6981 | * cycle of in-cycle offsets ∈ [0, 1], the cycle length in absolute |
| 6982 | * pixels along the gradient line, and the first stop's absolute |
| 6983 | * pixel position. Returns `null` when the cycle is degenerate |
| 6984 | * (zero-length or fewer than two stops) — callers fall through to |
| 6985 | * the non-repeating path. |
| 6986 | * |
| 6987 | * Mirrors the position-resolution algorithm in |
| 6988 | * {@see resolveGradientStops()} but keeps positions in absolute |
| 6989 | * px (length stops can exceed the gradient line length when an |
| 6990 | * author writes `… 100px` on a 50-px ray) rather than clamping to |
| 6991 | * [0, 1]. |
| 6992 | * |
| 6993 | * @param list<\Phpdftk\Css\Value\GradientStop> $stops |
| 6994 | * @return array{list<array{offset: float, rgb: array{float, float, float}}>, float, float}|null |
| 6995 | */ |
| 6996 | private function resolveRepeatingLinearCycle(array $stops, float $gradientLineLength): ?array |
| 6997 | { |
| 6998 | $count = count($stops); |
| 6999 | if ($count < 2) { |
| 7000 | return null; |
| 7001 | } |
| 7002 | $positions = array_fill(0, $count, null); |
| 7003 | foreach ($stops as $i => $s) { |
| 7004 | if ($s->position instanceof \Phpdftk\Css\Value\Length) { |
| 7005 | $positions[$i] = $s->position->value; |
| 7006 | } elseif ($s->position instanceof \Phpdftk\Css\Value\Percentage) { |
| 7007 | $positions[$i] = $s->position->value / 100.0 * $gradientLineLength; |
| 7008 | } |
| 7009 | } |
| 7010 | if ($positions[0] === null) { |
| 7011 | $positions[0] = 0.0; |
| 7012 | } |
| 7013 | if ($positions[$count - 1] === null) { |
| 7014 | $positions[$count - 1] = $gradientLineLength; |
| 7015 | } |
| 7016 | // Monotonic clamp — each explicit position must be ≥ prior. |
| 7017 | $prev = -INF; |
| 7018 | foreach ($positions as $i => $p) { |
| 7019 | if ($p !== null) { |
| 7020 | $positions[$i] = max($p, $prev); |
| 7021 | $prev = $positions[$i]; |
| 7022 | } |
| 7023 | } |
| 7024 | // Interpolate runs of unset positions between anchored stops. |
| 7025 | $i = 0; |
| 7026 | while ($i < $count) { |
| 7027 | if ($positions[$i] !== null) { |
| 7028 | $i++; |
| 7029 | continue; |
| 7030 | } |
| 7031 | $start = $i - 1; |
| 7032 | $end = $i; |
| 7033 | while ($end < $count && $positions[$end] === null) { |
| 7034 | $end++; |
| 7035 | } |
| 7036 | $span = $positions[$end] - $positions[$start]; |
| 7037 | $gap = $end - $start; |
| 7038 | for ($j = $start + 1; $j < $end; $j++) { |
| 7039 | $positions[$j] = $positions[$start] + $span * ($j - $start) / $gap; |
| 7040 | } |
| 7041 | $i = $end; |
| 7042 | } |
| 7043 | $firstPos = (float) $positions[0]; |
| 7044 | $lastPos = (float) $positions[$count - 1]; |
| 7045 | $cycleLength = $lastPos - $firstPos; |
| 7046 | if ($cycleLength <= 0.0) { |
| 7047 | return null; |
| 7048 | } |
| 7049 | $inCycle = []; |
| 7050 | foreach ($stops as $i => $s) { |
| 7051 | $inCycle[] = [ |
| 7052 | 'offset' => ((float) $positions[$i] - $firstPos) / $cycleLength, |
| 7053 | 'rgb' => [$s->color->r, $s->color->g, $s->color->b], |
| 7054 | ]; |
| 7055 | } |
| 7056 | return [$inCycle, $cycleLength, $firstPos]; |
| 7057 | } |
| 7058 | |
| 7059 | /** |
| 7060 | * Extend the gradient axis to cover the clip rect's projection onto |
| 7061 | * the gradient line in whole cycles, and emit a stop list that |
| 7062 | * replicates the in-cycle stops once per cycle across the extended |
| 7063 | * [0, 1] domain. |
| 7064 | * |
| 7065 | * @param array{list<array{offset: float, rgb: array{float, float, float}}>, float, float} $cycle |
| 7066 | * @return array{float, float, float, float, list<array{offset: float, rgb: array{float, float, float}}>} |
| 7067 | */ |
| 7068 | private function buildRepeatingLinearAxis( |
| 7069 | array $cycle, |
| 7070 | float $startPdfX, |
| 7071 | float $startPdfY, |
| 7072 | float $dx, |
| 7073 | float $dy, |
| 7074 | float $clipX, |
| 7075 | float $clipPdfY, |
| 7076 | float $clipWidth, |
| 7077 | float $clipHeight, |
| 7078 | ): array { |
| 7079 | [$inCycleStops, $cycleLength, $firstPos] = $cycle; |
| 7080 | $tMin = INF; |
| 7081 | $tMax = -INF; |
| 7082 | foreach ( |
| 7083 | [ |
| 7084 | [$clipX, $clipPdfY], |
| 7085 | [$clipX + $clipWidth, $clipPdfY], |
| 7086 | [$clipX, $clipPdfY + $clipHeight], |
| 7087 | [$clipX + $clipWidth, $clipPdfY + $clipHeight], |
| 7088 | ] as [$px, $py] |
| 7089 | ) { |
| 7090 | $t = ($px - $startPdfX) * $dx + ($py - $startPdfY) * $dy; |
| 7091 | if ($t < $tMin) { |
| 7092 | $tMin = $t; |
| 7093 | } |
| 7094 | if ($t > $tMax) { |
| 7095 | $tMax = $t; |
| 7096 | } |
| 7097 | } |
| 7098 | $kMin = (int) floor(($tMin - $firstPos) / $cycleLength); |
| 7099 | $kMax = (int) ceil(($tMax - $firstPos) / $cycleLength) - 1; |
| 7100 | if ($kMax < $kMin) { |
| 7101 | $kMax = $kMin; |
| 7102 | } |
| 7103 | // Defensive cap. A clip-extent / cycle ratio over 500 means |
| 7104 | // either a wildly short cycle or a huge clip rect; either way |
| 7105 | // the result is visually indistinguishable past that count and |
| 7106 | // not worth the pattern bytes. |
| 7107 | $maxCycles = 500; |
| 7108 | $cycles = $kMax - $kMin + 1; |
| 7109 | if ($cycles > $maxCycles) { |
| 7110 | $kMax = $kMin + $maxCycles - 1; |
| 7111 | $cycles = $maxCycles; |
| 7112 | } |
| 7113 | $extStartPos = $firstPos + $kMin * $cycleLength; |
| 7114 | $extEndPos = $firstPos + ($kMax + 1) * $cycleLength; |
| 7115 | $extStartX = $startPdfX + $extStartPos * $dx; |
| 7116 | $extStartY = $startPdfY + $extStartPos * $dy; |
| 7117 | $extEndX = $startPdfX + $extEndPos * $dx; |
| 7118 | $extEndY = $startPdfY + $extEndPos * $dy; |
| 7119 | $stopList = []; |
| 7120 | for ($k = 0; $k < $cycles; $k++) { |
| 7121 | foreach ($inCycleStops as $s) { |
| 7122 | $stopList[] = [ |
| 7123 | 'offset' => ($k + $s['offset']) / $cycles, |
| 7124 | 'rgb' => $s['rgb'], |
| 7125 | ]; |
| 7126 | } |
| 7127 | } |
| 7128 | return [$extStartX, $extStartY, $extEndX, $extEndY, $stopList]; |
| 7129 | } |
| 7130 | |
| 7131 | /** |
| 7132 | * Paint a CSS `linear-gradient(<angle>|to <side>, <stops>)` as the |
| 7133 | * box's background. Phase-1 simplification: only the first and last |
| 7134 | * stop colours are honoured (PDF's basic shading dictionary is |
| 7135 | * two-stop). The gradient line orientation comes from the CSS angle |
| 7136 | * (CSS direction: 0deg = upward, 90deg = rightward, 180deg = down, |
| 7137 | * 270deg = leftward; angles increase clockwise). |
| 7138 | */ |
| 7139 | /** |
| 7140 | * Paint a CSS `linear-gradient(...)` as a box background. |
| 7141 | * |
| 7142 | * The (tileX, tileTop, tileWidth, tileHeight) rect is the |
| 7143 | * **gradient's positioning + sizing area** — gradient line and |
| 7144 | * stop offsets resolve against it (CSS Images 3 §3.1, §3.5.1). |
| 7145 | * `clipRect`, when supplied, scopes the actual paint to a |
| 7146 | * different area (e.g. the background-clip rect when bg-size |
| 7147 | * specifies an explicit tile smaller than the box). Defaults to |
| 7148 | * the tile rect so callers that pass only one rect get the |
| 7149 | * previous behaviour. |
| 7150 | * |
| 7151 | * @param array{0: float, 1: float, 2: float, 3: float}|null $clipRect |
| 7152 | * Layout-space rect [x, top, width, height]. Null = same as tile. |
| 7153 | */ |
| 7154 | private function paintLinearGradient( |
| 7155 | \Phpdftk\Css\Value\LinearGradient $gradient, |
| 7156 | ContentStream $stream, |
| 7157 | float $tileX, |
| 7158 | float $tileTop, |
| 7159 | float $tileWidth, |
| 7160 | float $tileHeight, |
| 7161 | ?array $clipRect = null, |
| 7162 | ): void { |
| 7163 | if ($gradient->stops === []) { |
| 7164 | return; |
| 7165 | } |
| 7166 | if ($tileWidth <= 0.0 || $tileHeight <= 0.0) { |
| 7167 | return; |
| 7168 | } |
| 7169 | [$clipX, $clipTop, $clipWidth, $clipHeight] = $clipRect |
| 7170 | ?? [$tileX, $tileTop, $tileWidth, $tileHeight]; |
| 7171 | // CSS Images 3 §3.5.1 — a gradient with a single colour-stop |
| 7172 | // renders as a solid fill of that colour. PDF's ShadingType-2/3 |
| 7173 | // stitching function needs ≥2 stops, so short-circuit to a plain |
| 7174 | // rectangle fill (the shading path would otherwise throw and paint |
| 7175 | // nothing, exposing the element's fallback background). This needs |
| 7176 | // no PDF writer, so it runs before the shading-only writer guard. |
| 7177 | if (count($gradient->stops) === 1) { |
| 7178 | $this->fillGradientSolidStop( |
| 7179 | $gradient->stops[0], |
| 7180 | $stream, |
| 7181 | $clipX, |
| 7182 | $clipTop, |
| 7183 | $clipWidth, |
| 7184 | $clipHeight, |
| 7185 | ); |
| 7186 | return; |
| 7187 | } |
| 7188 | if ($this->writer === null) { |
| 7189 | return; |
| 7190 | } |
| 7191 | $tilePdfY = $this->pageHeight - $tileTop - $tileHeight; |
| 7192 | $clipPdfY = $this->pageHeight - $clipTop - $clipHeight; |
| 7193 | // CSS angle convention: 0deg points up, increases clockwise. The |
| 7194 | // gradient line passes through the centre of the *tile*. Compute |
| 7195 | // its start and end points on the tile's edge per CSS Images 3 §3.1. |
| 7196 | // A `to <corner>` direction's angle depends on the tile's aspect |
| 7197 | // ratio (the gradient line is perpendicular to the diagonal joining |
| 7198 | // the other two corners), so resolve it here where the tile size |
| 7199 | // is known rather than using the parser's square-box fallback. |
| 7200 | $rawAngle = $gradient->corner !== null |
| 7201 | ? $gradient->corner->angleFor($tileWidth, $tileHeight) |
| 7202 | : $gradient->angleDeg; |
| 7203 | $angle = fmod($rawAngle, 360.0); |
| 7204 | if ($angle < 0.0) { |
| 7205 | $angle += 360.0; |
| 7206 | } |
| 7207 | $rad = deg2rad($angle); |
| 7208 | $cx = $tileX + $tileWidth / 2; |
| 7209 | $cy = $tilePdfY + $tileHeight / 2; |
| 7210 | // Gradient line half-length so the endpoints sit on the tile |
| 7211 | // boundary corners (CSS spec): l/2 = |W sin θ| + |H cos θ| / 2 |
| 7212 | $sin = sin($rad); |
| 7213 | $cos = cos($rad); |
| 7214 | $halfLen = (abs($tileWidth * $sin) + abs($tileHeight * $cos)) / 2; |
| 7215 | // Full line length is twice the half — what `<length>` stops |
| 7216 | // resolve against (CSS Images 3 §3.5.1). |
| 7217 | $lineLength = $halfLen * 2; |
| 7218 | // The CSS convention rotates the gradient line such that 0deg |
| 7219 | // points UP (towards the box top). In PDF space the y-axis |
| 7220 | // grows upward already (after our flip), so "up" is +y. |
| 7221 | $dx = $sin; |
| 7222 | $dy = $cos; |
| 7223 | $startPdfX = $cx - $dx * $halfLen; |
| 7224 | $startPdfY = $cy - $dy * $halfLen; |
| 7225 | $endPdfX = $cx + $dx * $halfLen; |
| 7226 | $endPdfY = $cy + $dy * $halfLen; |
| 7227 | // CSS Images 4 §6.4 — `repeating-linear-gradient` replays the |
| 7228 | // stop list at `(lastStopPos - firstStopPos)` intervals along |
| 7229 | // the gradient ray, infinitely. We approximate that by |
| 7230 | // extending the axis to cover the clip projection in whole |
| 7231 | // cycles and feeding the shading a stop list that replicates |
| 7232 | // the in-cycle stops once per cycle. |
| 7233 | $stopList = null; |
| 7234 | if ($gradient->repeating) { |
| 7235 | $cycle = $this->resolveRepeatingLinearCycle($gradient->stops, $lineLength); |
| 7236 | if ($cycle !== null) { |
| 7237 | $extended = $this->buildRepeatingLinearAxis( |
| 7238 | $cycle, |
| 7239 | $startPdfX, |
| 7240 | $startPdfY, |
| 7241 | $dx, |
| 7242 | $dy, |
| 7243 | $clipX, |
| 7244 | $clipPdfY, |
| 7245 | $clipWidth, |
| 7246 | $clipHeight, |
| 7247 | ); |
| 7248 | [$startPdfX, $startPdfY, $endPdfX, $endPdfY, $stopList] = $extended; |
| 7249 | } |
| 7250 | } |
| 7251 | $stopList ??= $this->resolveGradientStops($gradient->stops, $lineLength, $gradient->interpolationSpace, $gradient->hueInterpolation); |
| 7252 | try { |
| 7253 | $doc = \Phpdftk\Pdf\Writer\PdfDoc::wrap($this->writer); |
| 7254 | $pattern = $doc->addLinearGradientStops( |
| 7255 | new \Phpdftk\Geometry\Point($startPdfX, $startPdfY), |
| 7256 | new \Phpdftk\Geometry\Point($endPdfX, $endPdfY), |
| 7257 | $stopList, |
| 7258 | ); |
| 7259 | } catch (\Throwable) { |
| 7260 | return; |
| 7261 | } |
| 7262 | // CSS gradient stops can carry alpha (`rgba(c, 0)` → `rgba(c, 1)`), |
| 7263 | // but a PDF colour shading has no alpha channel. When any stop is |
| 7264 | // translucent, build a Luminosity soft mask from the per-stop |
| 7265 | // alpha so the fill fades with opacity instead of rendering solid. |
| 7266 | $maskGsName = null; |
| 7267 | if ($this->gradientHasAlpha($gradient->stops)) { |
| 7268 | $alphaStops = $this->alphaStopsFrom($stopList); |
| 7269 | $maskGsName = $this->buildGradientAlphaMaskState( |
| 7270 | $doc, |
| 7271 | fn(\Phpdftk\Pdf\Writer\PdfDoc $d): int => $d->addLinearAlphaShading( |
| 7272 | new \Phpdftk\Geometry\Point($startPdfX, $startPdfY), |
| 7273 | new \Phpdftk\Geometry\Point($endPdfX, $endPdfY), |
| 7274 | $alphaStops, |
| 7275 | )->objectNumber, |
| 7276 | $clipX, |
| 7277 | $clipPdfY, |
| 7278 | $clipWidth, |
| 7279 | $clipHeight, |
| 7280 | ); |
| 7281 | } |
| 7282 | $stream->saveGraphicsState(); |
| 7283 | // Clip first to the bg-clip rect, then fill at the (typically |
| 7284 | // smaller) tile rect. When tile == clip the two are identical |
| 7285 | // and the behaviour is byte-for-byte the same as before. |
| 7286 | $stream->rectangle($clipX, $clipPdfY, $clipWidth, $clipHeight); |
| 7287 | $stream->clip(); |
| 7288 | $stream->endPath(); |
| 7289 | if ($maskGsName !== null) { |
| 7290 | $stream->setGraphicsState($maskGsName); |
| 7291 | } |
| 7292 | $patternName = $this->page?->useGradient($pattern); |
| 7293 | if ($patternName !== null) { |
| 7294 | $stream->setFillColorSpace('Pattern'); |
| 7295 | $stream->setFillColor($patternName); |
| 7296 | $stream->rectangle($tileX, $tilePdfY, $tileWidth, $tileHeight); |
| 7297 | $stream->fill(); |
| 7298 | } |
| 7299 | $stream->restoreGraphicsState(); |
| 7300 | } |
| 7301 | |
| 7302 | /** |
| 7303 | * Paint a CSS `background-image: url(...)` over the box's |
| 7304 | * background-positioning area. CSS Backgrounds 3 §3.9 `background-size` |
| 7305 | * support: |
| 7306 | * - `auto` / unset → stretch to fill (Phase-1 default; the legacy |
| 7307 | * `100% 100%`-equivalent we shipped before). |
| 7308 | * - `cover` → preserve aspect, scale to fully cover the box (image |
| 7309 | * may overflow; clipped to box rect). |
| 7310 | * - `contain` → preserve aspect, scale to fit inside the box; |
| 7311 | * image is centred and may show background-color through the |
| 7312 | * letterbox area. |
| 7313 | * - `<length> <length>` → explicit width × height; centred. |
| 7314 | */ |
| 7315 | /** |
| 7316 | * @param array{x: float, top: float, width: float, height: float}|null $originRect |
| 7317 | * Positioning area per CSS Backgrounds 3 §3.4 `background-origin`. |
| 7318 | * When null, defaults to the (x, top, width, height) clip rect — |
| 7319 | * keeps the Phase-1 behaviour of positioning + clipping against |
| 7320 | * the same rect. When supplied, image sizing + positioning math |
| 7321 | * uses this rect while clipping uses the outer (clip) rect. |
| 7322 | */ |
| 7323 | private function paintBackgroundImage( |
| 7324 | \Phpdftk\Css\Value\Url $url, |
| 7325 | ContentStream $stream, |
| 7326 | float $x, |
| 7327 | float $top, |
| 7328 | float $width, |
| 7329 | float $height, |
| 7330 | ?\Phpdftk\Css\Value\Value $sizeValue = null, |
| 7331 | ?\Phpdftk\Css\Value\Value $positionValue = null, |
| 7332 | ?\Phpdftk\Css\Value\Value $repeatValue = null, |
| 7333 | ?array $originRect = null, |
| 7334 | ): void { |
| 7335 | if ($this->writer === null || $this->page === null) { |
| 7336 | return; |
| 7337 | } |
| 7338 | $src = $url->url; |
| 7339 | $svgDoc = null; |
| 7340 | $name = null; |
| 7341 | if ($this->isSvgSrc($src)) { |
| 7342 | $svgDoc = $this->loadSvgDocument($src); |
| 7343 | if ($svgDoc === null) { |
| 7344 | return; |
| 7345 | } |
| 7346 | } elseif (isset($this->imageNameCache[$src])) { |
| 7347 | $name = $this->imageNameCache[$src]; |
| 7348 | } else { |
| 7349 | $resolved = $this->resolveImageSrc($src); |
| 7350 | if ($resolved === null) { |
| 7351 | return; |
| 7352 | } |
| 7353 | try { |
| 7354 | $name = $this->writer->addImage($resolved, $this->page); |
| 7355 | } catch (\Throwable) { |
| 7356 | return; |
| 7357 | } |
| 7358 | $this->imageNameCache[$src] = $name; |
| 7359 | } |
| 7360 | // Positioning anchor: $originRect when supplied, else fall |
| 7361 | // back to the clip rect (Phase-1 behaviour). |
| 7362 | $originX = $originRect['x'] ?? $x; |
| 7363 | $originTop = $originRect['top'] ?? $top; |
| 7364 | $originWidth = $originRect['width'] ?? $width; |
| 7365 | $originHeight = $originRect['height'] ?? $height; |
| 7366 | // Resolve final paint rect (final size + offset within the |
| 7367 | // positioning area). |
| 7368 | $paint = $this->resolveBackgroundSize($sizeValue, $src, $originWidth, $originHeight); |
| 7369 | // CSS Backgrounds 3 §3.6 — `background-position` resolves |
| 7370 | // against the positioning area regardless of whether the tile |
| 7371 | // is smaller or larger than the area; for an oversized tile, |
| 7372 | // the position still anchors its origin (e.g. `0% 0%` |
| 7373 | // keeps the tile's top-left at the area's top-left, even if |
| 7374 | // the tile overflows). Reapply the author position whenever |
| 7375 | // it is supplied so it overrides the size resolver's default |
| 7376 | // centred offset. |
| 7377 | if ($positionValue !== null) { |
| 7378 | $pos = $this->resolveBackgroundPosition( |
| 7379 | $positionValue, |
| 7380 | $paint['w'], |
| 7381 | $paint['h'], |
| 7382 | $originWidth, |
| 7383 | $originHeight, |
| 7384 | ); |
| 7385 | $paint['offsetX'] = $pos['offsetX']; |
| 7386 | $paint['offsetY'] = $pos['offsetY']; |
| 7387 | } |
| 7388 | $this->drawImageTilesInto( |
| 7389 | $stream, |
| 7390 | $svgDoc, |
| 7391 | $name, |
| 7392 | $x, |
| 7393 | $top, |
| 7394 | $width, |
| 7395 | $height, |
| 7396 | $paint, |
| 7397 | $repeatValue, |
| 7398 | $originX, |
| 7399 | $originTop, |
| 7400 | $originWidth, |
| 7401 | $originHeight, |
| 7402 | null, |
| 7403 | ); |
| 7404 | } |
| 7405 | |
| 7406 | /** |
| 7407 | * Tile an image (an SVG doc OR a raster XObject `$name`) across a |
| 7408 | * positioning area, clipped to a rect, per CSS Backgrounds 3 §3.7-3.9 |
| 7409 | * (background-size / -position / -repeat already folded into `$paint` |
| 7410 | * and `$repeatValue`). Extracted from {@see paintBackgroundImage} so the |
| 7411 | * mask painter can reuse it to draw a `mask-image: url()` into a soft-mask |
| 7412 | * transparency group. `$registerXObject`, when given, is called with the |
| 7413 | * XObject name before each `Do` so the caller can register the image in |
| 7414 | * the target stream's resources (needed for a transparency group, which |
| 7415 | * has its own resources); the background path passes null (the image is |
| 7416 | * already in the page resources). |
| 7417 | * |
| 7418 | * @param array{w: float, h: float, offsetX: float, offsetY: float} $paint |
| 7419 | * @param \Closure(string): void|null $registerXObject |
| 7420 | */ |
| 7421 | private function drawImageTilesInto( |
| 7422 | ContentStream $stream, |
| 7423 | ?\Phpdftk\Svg\SvgDocument $svgDoc, |
| 7424 | ?string $name, |
| 7425 | float $x, |
| 7426 | float $top, |
| 7427 | float $width, |
| 7428 | float $height, |
| 7429 | array $paint, |
| 7430 | ?\Phpdftk\Css\Value\Value $repeatValue, |
| 7431 | float $originX, |
| 7432 | float $originTop, |
| 7433 | float $originWidth, |
| 7434 | float $originHeight, |
| 7435 | ?\Closure $registerXObject = null, |
| 7436 | ): void { |
| 7437 | $pdfY = $this->pageHeight - $top - $height; |
| 7438 | $stream->saveGraphicsState(); |
| 7439 | // `cover` may overflow the box; clip to box rect so the overflow |
| 7440 | // doesn't bleed into adjacent boxes. |
| 7441 | $stream->rectangle($x, $pdfY, $width, $height); |
| 7442 | $stream->clip(); |
| 7443 | $stream->endPath(); |
| 7444 | // CSS Backgrounds 3 §3.8: `background-repeat` decides whether |
| 7445 | // to tile the image when its painted rect doesn't fill the box. |
| 7446 | // `no-repeat` paints one instance; `repeat` / `repeat-x` / |
| 7447 | // `repeat-y` tile across the relevant axes. The painter's box |
| 7448 | // clip handles edge tiles that extend past the box rect. |
| 7449 | $repeat = $this->repeatAxes($repeatValue); |
| 7450 | $repeatModes = $this->repeatModes($repeatValue); |
| 7451 | $tileW = $paint['w']; |
| 7452 | $tileH = $paint['h']; |
| 7453 | if ($tileW <= 0.0 || $tileH <= 0.0) { |
| 7454 | $stream->restoreGraphicsState(); |
| 7455 | return; |
| 7456 | } |
| 7457 | // CSS Backgrounds 3 §3.7 — `round` per axis scales the tile |
| 7458 | // so a whole number of tiles fits the positioning area. Apply |
| 7459 | // before computing tile offsets so subsequent positioning + the |
| 7460 | // repeat loop see the rescaled tile dims. |
| 7461 | $tileW = $this->roundTileDim($repeatModes['x'], $tileW, $originWidth); |
| 7462 | $tileH = $this->roundTileDim($repeatModes['y'], $tileH, $originHeight); |
| 7463 | $paint['w'] = $tileW; |
| 7464 | $paint['h'] = $tileH; |
| 7465 | // Start positions: shift the anchor backwards by whole tile |
| 7466 | // widths until the leftmost / topmost tile sits at or before |
| 7467 | // the origin box (NOT the clip box — tiles anchor against |
| 7468 | // `background-origin`). With `no-repeat`, no shift happens. |
| 7469 | // Tile iteration bounds. A repeating axis tiles across the whole |
| 7470 | // PAINT/clip rect (which for a propagated root background is the |
| 7471 | // entire canvas, larger than the positioning area), anchored to |
| 7472 | // the origin rect. A non-repeating axis paints a single tile |
| 7473 | // within the origin rect. For a normal box clip == origin, so |
| 7474 | // these reduce to the origin bounds (no behaviour change). |
| 7475 | $startX = $paint['offsetX']; |
| 7476 | $farX = $originWidth; |
| 7477 | if ($repeat['x']) { |
| 7478 | $farX = $x + $width - $originX; |
| 7479 | while ($originX + $startX > $x) { |
| 7480 | $startX -= $tileW; |
| 7481 | } |
| 7482 | } |
| 7483 | $startY = $paint['offsetY']; |
| 7484 | $farY = $originHeight; |
| 7485 | if ($repeat['y']) { |
| 7486 | $farY = $top + $height - $originTop; |
| 7487 | while ($originTop + $startY > $top) { |
| 7488 | $startY -= $tileH; |
| 7489 | } |
| 7490 | } |
| 7491 | $originBottomLayoutY = $originTop + $originHeight; |
| 7492 | $originPdfBottom = $this->pageHeight - $originBottomLayoutY; |
| 7493 | // Precompute the per-axis tile offsets (relative to the origin |
| 7494 | // edge). This unifies repeat / round / no-repeat / space: `space` |
| 7495 | // distributes even gaps rather than butting tiles, the others step |
| 7496 | // continuously. |
| 7497 | $xOffsets = $this->tileOffsets($repeatModes['x'], $repeat['x'], $startX, $farX, $tileW, $paint['offsetX'], $originWidth); |
| 7498 | $yOffsets = $this->tileOffsets($repeatModes['y'], $repeat['y'], $startY, $farY, $tileH, $paint['offsetY'], $originHeight); |
| 7499 | $maxTiles = 4096; |
| 7500 | $tileCount = 0; |
| 7501 | foreach ($yOffsets as $offsetY) { |
| 7502 | foreach ($xOffsets as $offsetX) { |
| 7503 | if ($tileCount >= $maxTiles) { |
| 7504 | break 2; |
| 7505 | } |
| 7506 | $tileBottomY = $originPdfBottom + ($originHeight - $tileH - $offsetY); |
| 7507 | if ($svgDoc !== null) { |
| 7508 | // Route the SVG draw through the caller's stream so |
| 7509 | // it lands INSIDE the bg-clip `q ... clip ... Q` |
| 7510 | // scope this method opened above. Without this the |
| 7511 | // page would attach a fresh content stream and the |
| 7512 | // SVG paint (e.g. a `cover`-overflowed 768×3072 |
| 7513 | // tile) escapes the box clip. |
| 7514 | $this->svgRenderer()->draw( |
| 7515 | $svgDoc, |
| 7516 | $originX + $offsetX, |
| 7517 | $tileBottomY, |
| 7518 | $tileW, |
| 7519 | $tileH, |
| 7520 | stream: $stream, |
| 7521 | ); |
| 7522 | } else { |
| 7523 | assert($name !== null); |
| 7524 | if ($registerXObject !== null) { |
| 7525 | $registerXObject($name); |
| 7526 | } |
| 7527 | $stream->saveGraphicsState(); |
| 7528 | $stream->concatMatrix( |
| 7529 | $tileW, |
| 7530 | 0.0, |
| 7531 | 0.0, |
| 7532 | $tileH, |
| 7533 | $originX + $offsetX, |
| 7534 | $tileBottomY, |
| 7535 | ); |
| 7536 | $stream->doXObject($name); |
| 7537 | $stream->restoreGraphicsState(); |
| 7538 | } |
| 7539 | $tileCount++; |
| 7540 | } |
| 7541 | } |
| 7542 | $stream->restoreGraphicsState(); |
| 7543 | } |
| 7544 | |
| 7545 | /** |
| 7546 | * Resolve a CSS `background-repeat` value to a `{x: bool, y: bool}` |
| 7547 | * pair indicating whether each axis should tile (true for all |
| 7548 | * non-`no-repeat` modes; the per-axis `round` / `space` math |
| 7549 | * folds back into the caller via {@see repeatModes}). |
| 7550 | * |
| 7551 | * Phase-1 handles the simple keyword set: |
| 7552 | * - `repeat` (default) → both axes |
| 7553 | * - `repeat-x` → x only |
| 7554 | * - `repeat-y` → y only |
| 7555 | * - `no-repeat` → neither |
| 7556 | * - `round` / `space` → both axes (loop-active; the actual |
| 7557 | * scale-to-fit / distribute-spacing math is layered on top |
| 7558 | * of the loop) |
| 7559 | * - two-value form (e.g. `repeat no-repeat`): per-axis keywords |
| 7560 | * |
| 7561 | * @return array{x: bool, y: bool} |
| 7562 | */ |
| 7563 | private function repeatAxes(?\Phpdftk\Css\Value\Value $value): array |
| 7564 | { |
| 7565 | $modes = $this->repeatModes($value); |
| 7566 | return [ |
| 7567 | 'x' => $modes['x'] !== 'no-repeat', |
| 7568 | 'y' => $modes['y'] !== 'no-repeat', |
| 7569 | ]; |
| 7570 | } |
| 7571 | |
| 7572 | /** |
| 7573 | * Per-axis `background-repeat` mode (the richer view repeatAxes |
| 7574 | * collapses to bools). Returns one of `repeat` / `repeat-x` (collapsed |
| 7575 | * to a single bool above) / `no-repeat` / `round` / `space` per axis. |
| 7576 | * |
| 7577 | * @return array{x: string, y: string} |
| 7578 | */ |
| 7579 | private function repeatModes(?\Phpdftk\Css\Value\Value $value): array |
| 7580 | { |
| 7581 | if ($value === null) { |
| 7582 | return ['x' => 'repeat', 'y' => 'repeat']; |
| 7583 | } |
| 7584 | $items = $value instanceof \Phpdftk\Css\Value\ValueList |
| 7585 | && $value->separator === \Phpdftk\Css\Value\ListSeparator::Space |
| 7586 | ? $value->values |
| 7587 | : [$value]; |
| 7588 | if (count($items) === 2 |
| 7589 | && $items[0] instanceof \Phpdftk\Css\Value\Keyword |
| 7590 | && $items[1] instanceof \Phpdftk\Css\Value\Keyword |
| 7591 | ) { |
| 7592 | return [ |
| 7593 | 'x' => strtolower($items[0]->name), |
| 7594 | 'y' => strtolower($items[1]->name), |
| 7595 | ]; |
| 7596 | } |
| 7597 | if ($items[0] instanceof \Phpdftk\Css\Value\Keyword) { |
| 7598 | return match (strtolower($items[0]->name)) { |
| 7599 | 'repeat-x' => ['x' => 'repeat', 'y' => 'no-repeat'], |
| 7600 | 'repeat-y' => ['x' => 'no-repeat', 'y' => 'repeat'], |
| 7601 | 'no-repeat' => ['x' => 'no-repeat', 'y' => 'no-repeat'], |
| 7602 | 'round' => ['x' => 'round', 'y' => 'round'], |
| 7603 | 'space' => ['x' => 'space', 'y' => 'space'], |
| 7604 | default => ['x' => 'repeat', 'y' => 'repeat'], |
| 7605 | }; |
| 7606 | } |
| 7607 | return ['x' => 'repeat', 'y' => 'repeat']; |
| 7608 | } |
| 7609 | |
| 7610 | /** |
| 7611 | * CSS Backgrounds 3 §3.7 `round` per-axis rescale: scale the |
| 7612 | * tile so a whole number of tiles fits the positioning area, |
| 7613 | * preserving aspect when possible. Returns the rescaled tile |
| 7614 | * size; passthrough when the mode isn't `round` or the natural |
| 7615 | * tile dim is non-positive. |
| 7616 | */ |
| 7617 | private function roundTileDim(string $mode, float $tileDim, float $originDim): float |
| 7618 | { |
| 7619 | if ($mode !== 'round' || $tileDim <= 0.0 || $originDim <= 0.0) { |
| 7620 | return $tileDim; |
| 7621 | } |
| 7622 | // CSS spec: number of tiles = round(originDim / tileDim). |
| 7623 | // At least 1 — a tile larger than the box still emits once. |
| 7624 | $n = max(1, (int) round($originDim / $tileDim)); |
| 7625 | return $originDim / $n; |
| 7626 | } |
| 7627 | |
| 7628 | /** |
| 7629 | * Compute the per-axis list of tile offsets (relative to the |
| 7630 | * background-origin edge) for one axis of a repeated background image. |
| 7631 | * |
| 7632 | * - `no-repeat` → a single tile at the background-position offset. |
| 7633 | * - `repeat` / `round` → tiles butt together, stepping by `$tileDim` |
| 7634 | * from the back-shifted `$start` across the paint area to `$far` |
| 7635 | * (`round` has already rescaled `$tileDim` so a whole number fit). |
| 7636 | * - `space` (CSS Backgrounds 3 §3.7) → as many whole tiles as fit |
| 7637 | * without clipping, the remaining space distributed evenly so the |
| 7638 | * first and last tiles touch the two edges; background-position is |
| 7639 | * ignored on this axis. When 0 or 1 tile fits, a single tile is |
| 7640 | * placed at the background-position offset. |
| 7641 | * |
| 7642 | * @return list<float> |
| 7643 | */ |
| 7644 | private function tileOffsets( |
| 7645 | string $mode, |
| 7646 | bool $repeats, |
| 7647 | float $start, |
| 7648 | float $far, |
| 7649 | float $tileDim, |
| 7650 | float $positionedOffset, |
| 7651 | float $originDim, |
| 7652 | ): array { |
| 7653 | if (!$repeats) { |
| 7654 | return [$positionedOffset]; |
| 7655 | } |
| 7656 | if ($mode === 'space') { |
| 7657 | $n = $tileDim > 0.0 ? (int) floor($originDim / $tileDim + 1e-6) : 0; |
| 7658 | if ($n >= 2) { |
| 7659 | $step = $tileDim + ($originDim - $n * $tileDim) / ($n - 1); |
| 7660 | $offsets = []; |
| 7661 | for ($i = 0; $i < $n; $i++) { |
| 7662 | $offsets[] = $i * $step; |
| 7663 | } |
| 7664 | return $offsets; |
| 7665 | } |
| 7666 | return [$positionedOffset]; |
| 7667 | } |
| 7668 | // repeat / round — continuous butting tiles from the shifted start. |
| 7669 | $offsets = []; |
| 7670 | for ($o = $start; $o < $far; $o += $tileDim) { |
| 7671 | $offsets[] = $o; |
| 7672 | if (count($offsets) >= 4096) { |
| 7673 | break; |
| 7674 | } |
| 7675 | } |
| 7676 | return $offsets === [] ? [$start] : $offsets; |
| 7677 | } |
| 7678 | |
| 7679 | /** |
| 7680 | * Resolve a CSS `background-position` value to a top-left offset of |
| 7681 | * the image rect within the background-positioning area (the box's |
| 7682 | * rect). Per CSS Backgrounds 3 §3.7, position offsets are |
| 7683 | * interpolated such that `0% 0%` puts the image's top-left at the |
| 7684 | * box's top-left and `100% 100%` puts the image's bottom-right at |
| 7685 | * the box's bottom-right (i.e. `offset = (box - image) × percent`). |
| 7686 | * |
| 7687 | * Phase-1 surface: |
| 7688 | * - 1 keyword (`center` / `top` / `bottom` / `left` / `right`) → centred on the missing axis |
| 7689 | * - 2 values (keyword | length | percentage), one per axis |
| 7690 | * - Lengths offset directly; percentages use the spec formula. |
| 7691 | * Edge syntax (`right 10px bottom 20px`, 4-value form) lands later. |
| 7692 | * |
| 7693 | * @return array{offsetX: float, offsetY: float} |
| 7694 | */ |
| 7695 | private function resolveBackgroundPosition( |
| 7696 | \Phpdftk\Css\Value\Value $value, |
| 7697 | float $imageWidth, |
| 7698 | float $imageHeight, |
| 7699 | float $boxWidth, |
| 7700 | float $boxHeight, |
| 7701 | ): array { |
| 7702 | $items = $value instanceof \Phpdftk\Css\Value\ValueList |
| 7703 | && $value->separator === \Phpdftk\Css\Value\ListSeparator::Space |
| 7704 | ? $value->values |
| 7705 | : [$value]; |
| 7706 | // 50% default applies only when entering the single-keyword |
| 7707 | // branch below: per CSS Backgrounds 3 §3.6, a single keyword |
| 7708 | // (e.g. `top`, `left`) pins one axis and centres the other. |
| 7709 | // The two-value / empty path enters `else` and lets |
| 7710 | // `axisOffsetFromValue` resolve each side from its own value |
| 7711 | // (or its null-default of 0%, the spec's initial value). |
| 7712 | $xPercent = 0.5; |
| 7713 | $yPercent = 0.5; |
| 7714 | $xLength = null; |
| 7715 | $yLength = null; |
| 7716 | // CSS Backgrounds 3 §3.6 — the 3-4 value edge-offset form: each |
| 7717 | // <length-percentage> is an OFFSET FROM a preceding edge keyword |
| 7718 | // (`bottom 10px right 20px` = 10px up from bottom, 20px left from |
| 7719 | // right). Only triggers at 3+ items so the 1-2 value paths stay |
| 7720 | // byte-identical. |
| 7721 | if (count($items) >= 3) { |
| 7722 | [$xLength, $xPercent, $yLength, $yPercent] = $this->resolveEdgeOffsetPosition( |
| 7723 | $items, |
| 7724 | $imageWidth, |
| 7725 | $imageHeight, |
| 7726 | $boxWidth, |
| 7727 | $boxHeight, |
| 7728 | ); |
| 7729 | $offsetX = $xLength ?? ($boxWidth - $imageWidth) * $xPercent; |
| 7730 | $offsetY = $yLength ?? ($boxHeight - $imageHeight) * $yPercent; |
| 7731 | return ['offsetX' => $offsetX, 'offsetY' => $offsetY]; |
| 7732 | } |
| 7733 | // Single keyword: maps to one axis and centres the other. |
| 7734 | if (count($items) === 1 && $items[0] instanceof \Phpdftk\Css\Value\Keyword) { |
| 7735 | $kw = strtolower($items[0]->name); |
| 7736 | // Vertical-only keywords pin y; horizontal-only pin x. |
| 7737 | switch ($kw) { |
| 7738 | case 'top': $yPercent = 0.0; |
| 7739 | break; |
| 7740 | case 'bottom': $yPercent = 1.0; |
| 7741 | break; |
| 7742 | case 'left': $xPercent = 0.0; |
| 7743 | break; |
| 7744 | case 'right': $xPercent = 1.0; |
| 7745 | break; |
| 7746 | case 'center': default: break; |
| 7747 | } |
| 7748 | } else { |
| 7749 | // Two-value form. Per CSS Backgrounds 3 §3.6 the components may |
| 7750 | // appear in either axis order: `left`/`right` always bind X and |
| 7751 | // `top`/`bottom` always bind Y, so `top center` and `center left` |
| 7752 | // must be read axis-first, not positionally. Swap when the first |
| 7753 | // component is a vertical keyword or the second is a horizontal |
| 7754 | // keyword; the common `<x> <y>` order stays byte-identical. |
| 7755 | $xItem = $items[0] ?? null; |
| 7756 | $yItem = $items[1] ?? null; |
| 7757 | if ($this->isVerticalPositionKeyword($xItem) |
| 7758 | || $this->isHorizontalPositionKeyword($yItem) |
| 7759 | ) { |
| 7760 | [$xItem, $yItem] = [$yItem, $xItem]; |
| 7761 | } |
| 7762 | // CSS Backgrounds 3 §3.6 — when the author specifies exactly |
| 7763 | // ONE value (e.g. `background-position: 25%` or `-0px`), the |
| 7764 | // second value is `center` (50%), not the unspecified initial |
| 7765 | // `0%`. An EMPTY list (count 0) is the unspecified initial and |
| 7766 | // keeps `0% 0%`; a single keyword is handled above. |
| 7767 | $singleValue = count($items) === 1; |
| 7768 | $xAxis = $this->axisOffsetFromValue($xItem, isHorizontal: true); |
| 7769 | if ($xAxis['percent'] !== null) { |
| 7770 | $xPercent = $xAxis['percent']; |
| 7771 | } |
| 7772 | if ($xAxis['length'] !== null) { |
| 7773 | $xLength = $xAxis['length']; |
| 7774 | } |
| 7775 | if ($singleValue) { |
| 7776 | $yPercent = 0.5; |
| 7777 | } else { |
| 7778 | $yAxis = $this->axisOffsetFromValue($yItem, isHorizontal: false); |
| 7779 | if ($yAxis['percent'] !== null) { |
| 7780 | $yPercent = $yAxis['percent']; |
| 7781 | } |
| 7782 | if ($yAxis['length'] !== null) { |
| 7783 | $yLength = $yAxis['length']; |
| 7784 | } |
| 7785 | } |
| 7786 | } |
| 7787 | $offsetX = $xLength ?? ($boxWidth - $imageWidth) * $xPercent; |
| 7788 | $offsetY = $yLength ?? ($boxHeight - $imageHeight) * $yPercent; |
| 7789 | return ['offsetX' => $offsetX, 'offsetY' => $offsetY]; |
| 7790 | } |
| 7791 | |
| 7792 | /** |
| 7793 | * CSS Backgrounds 3 §3.6 — resolve the 3-4 value `background-position` |
| 7794 | * edge-offset form into `[xLength, xPercent, yLength, yPercent]` (the |
| 7795 | * same shape {@see resolveBackgroundPosition} folds into an offset). |
| 7796 | * Each edge keyword (`left`/`right`/`top`/`bottom`/`center`) may be |
| 7797 | * followed by a `<length-percentage>` offset measured FROM that edge: |
| 7798 | * a `right`/`bottom` offset counts inward from the far edge. `center` |
| 7799 | * takes no offset and fills whichever axis the other group left open. |
| 7800 | * |
| 7801 | * @param list<\Phpdftk\Css\Value\Value> $items |
| 7802 | * @return array{0: ?float, 1: float, 2: ?float, 3: float} |
| 7803 | */ |
| 7804 | private function resolveEdgeOffsetPosition( |
| 7805 | array $items, |
| 7806 | float $imageWidth, |
| 7807 | float $imageHeight, |
| 7808 | float $boxWidth, |
| 7809 | float $boxHeight, |
| 7810 | ): array { |
| 7811 | $xLength = null; |
| 7812 | $yLength = null; |
| 7813 | $xPercent = null; |
| 7814 | $yPercent = null; |
| 7815 | $count = count($items); |
| 7816 | $i = 0; |
| 7817 | while ($i < $count) { |
| 7818 | $item = $items[$i]; |
| 7819 | if (!($item instanceof \Phpdftk\Css\Value\Keyword)) { |
| 7820 | $i++; |
| 7821 | continue; |
| 7822 | } |
| 7823 | $kw = strtolower($item->name); |
| 7824 | // Pull an optional trailing offset (not for `center`). |
| 7825 | $offset = null; |
| 7826 | if ($kw !== 'center' && $i + 1 < $count) { |
| 7827 | $next = $items[$i + 1]; |
| 7828 | if ($next instanceof \Phpdftk\Css\Value\Length |
| 7829 | || $next instanceof \Phpdftk\Css\Value\Percentage |
| 7830 | ) { |
| 7831 | $offset = $next; |
| 7832 | $i++; |
| 7833 | } |
| 7834 | } |
| 7835 | $i++; |
| 7836 | $far = $kw === 'right' || $kw === 'bottom'; |
| 7837 | $isX = $kw === 'left' || $kw === 'right'; |
| 7838 | $isY = $kw === 'top' || $kw === 'bottom'; |
| 7839 | if ($kw === 'center') { |
| 7840 | if ($xPercent === null && $xLength === null) { |
| 7841 | $xPercent = 0.5; |
| 7842 | } else { |
| 7843 | $yPercent = 0.5; |
| 7844 | } |
| 7845 | continue; |
| 7846 | } |
| 7847 | if ($offset instanceof \Phpdftk\Css\Value\Length) { |
| 7848 | if ($isX) { |
| 7849 | $xLength = $far ? ($boxWidth - $imageWidth) - $offset->value : $offset->value; |
| 7850 | } elseif ($isY) { |
| 7851 | $yLength = $far ? ($boxHeight - $imageHeight) - $offset->value : $offset->value; |
| 7852 | } |
| 7853 | } elseif ($offset instanceof \Phpdftk\Css\Value\Percentage) { |
| 7854 | $p = $offset->value / 100.0; |
| 7855 | $p = $far ? 1.0 - $p : $p; |
| 7856 | if ($isX) { |
| 7857 | $xPercent = $p; |
| 7858 | } elseif ($isY) { |
| 7859 | $yPercent = $p; |
| 7860 | } |
| 7861 | } else { |
| 7862 | // Bare edge keyword: anchor at that edge. |
| 7863 | if ($isX) { |
| 7864 | $xPercent = $far ? 1.0 : 0.0; |
| 7865 | } elseif ($isY) { |
| 7866 | $yPercent = $far ? 1.0 : 0.0; |
| 7867 | } |
| 7868 | } |
| 7869 | } |
| 7870 | return [$xLength, $xPercent ?? 0.5, $yLength, $yPercent ?? 0.5]; |
| 7871 | } |
| 7872 | |
| 7873 | /** |
| 7874 | * Classify a single `background-position` axis value into a |
| 7875 | * `{percent?, length?}` pair. Keywords (`top`/`bottom`/`left`/ |
| 7876 | * `right`/`center`) become percentages; explicit `<length>` / |
| 7877 | * `<percentage>` values come through as-is. |
| 7878 | * |
| 7879 | * @return array{percent: ?float, length: ?float} |
| 7880 | */ |
| 7881 | /** |
| 7882 | * True for the horizontal-axis `background-position` keywords |
| 7883 | * (`left` / `right`), which bind the X axis regardless of order. |
| 7884 | */ |
| 7885 | private function isHorizontalPositionKeyword(?\Phpdftk\Css\Value\Value $v): bool |
| 7886 | { |
| 7887 | return $v instanceof \Phpdftk\Css\Value\Keyword |
| 7888 | && in_array(strtolower($v->name), ['left', 'right'], true); |
| 7889 | } |
| 7890 | |
| 7891 | /** |
| 7892 | * True for the vertical-axis `background-position` keywords |
| 7893 | * (`top` / `bottom`), which bind the Y axis regardless of order. |
| 7894 | */ |
| 7895 | private function isVerticalPositionKeyword(?\Phpdftk\Css\Value\Value $v): bool |
| 7896 | { |
| 7897 | return $v instanceof \Phpdftk\Css\Value\Keyword |
| 7898 | && in_array(strtolower($v->name), ['top', 'bottom'], true); |
| 7899 | } |
| 7900 | |
| 7901 | /** |
| 7902 | * @return array{percent: float|null, length: float|null} |
| 7903 | */ |
| 7904 | private function axisOffsetFromValue( |
| 7905 | ?\Phpdftk\Css\Value\Value $value, |
| 7906 | bool $isHorizontal, |
| 7907 | ): array { |
| 7908 | // CSS Backgrounds 3 §3.6 — `background-position` initial value |
| 7909 | // is `0% 0%` (top-left). A missing axis falls back to that |
| 7910 | // initial; the previous default of 50% (centre) misrouted any |
| 7911 | // explicit-tile case (e.g. `background-size: 12px auto` |
| 7912 | // without an explicit position) to centre instead of top-left. |
| 7913 | if ($value === null) { |
| 7914 | return ['percent' => 0.0, 'length' => null]; |
| 7915 | } |
| 7916 | if ($value instanceof \Phpdftk\Css\Value\Keyword) { |
| 7917 | $kw = strtolower($value->name); |
| 7918 | $percent = match ($kw) { |
| 7919 | 'left', 'top' => 0.0, |
| 7920 | 'right', 'bottom' => 1.0, |
| 7921 | 'center' => 0.5, |
| 7922 | default => 0.5, |
| 7923 | }; |
| 7924 | return ['percent' => $percent, 'length' => null]; |
| 7925 | } |
| 7926 | if ($value instanceof \Phpdftk\Css\Value\Percentage) { |
| 7927 | return ['percent' => $value->value / 100.0, 'length' => null]; |
| 7928 | } |
| 7929 | if ($value instanceof \Phpdftk\Css\Value\Length) { |
| 7930 | return ['percent' => null, 'length' => $value->value]; |
| 7931 | } |
| 7932 | // CSS Values 4 §4.2: bare `0` is treated as `0` in any |
| 7933 | // dimensional context, so `background-position: 0 0` resolves |
| 7934 | // to top-left anchor (not the default centre). |
| 7935 | if (($value instanceof \Phpdftk\Css\Value\Number |
| 7936 | || $value instanceof \Phpdftk\Css\Value\Integer) |
| 7937 | && (float) $value->value === 0.0 |
| 7938 | ) { |
| 7939 | return ['percent' => null, 'length' => 0.0]; |
| 7940 | } |
| 7941 | return ['percent' => 0.5, 'length' => null]; |
| 7942 | } |
| 7943 | |
| 7944 | /** |
| 7945 | * Compute the final paint rect for a CSS `background-size` value. |
| 7946 | * Returns the width / height (in points) and the offset (top-left |
| 7947 | * corner) within the containing background-positioning area. Phase 1 |
| 7948 | * always centres `contain`-sized images; `background-position` |
| 7949 | * support lands later with the full Backgrounds 3 §3.7 grammar. |
| 7950 | * |
| 7951 | * @return array{w: float, h: float, offsetX: float, offsetY: float} |
| 7952 | */ |
| 7953 | private function resolveBackgroundSize( |
| 7954 | ?\Phpdftk\Css\Value\Value $sizeValue, |
| 7955 | string $src, |
| 7956 | float $boxWidth, |
| 7957 | float $boxHeight, |
| 7958 | ): array { |
| 7959 | // Default / unset / `auto`: CSS Backgrounds 3 §3.9 — when both |
| 7960 | // axes are `auto` and the image has intrinsic dimensions, use |
| 7961 | // those dimensions; only fall back to box dims when the image |
| 7962 | // has no intrinsic info. |
| 7963 | $isAuto = $sizeValue === null |
| 7964 | || ($sizeValue instanceof \Phpdftk\Css\Value\Keyword |
| 7965 | && strtolower($sizeValue->name) === 'auto'); |
| 7966 | if ($isAuto) { |
| 7967 | // Per CSS Backgrounds 3 §3.9 — both auto and the image |
| 7968 | // has full intrinsic w+h (raster, or SVG with both axes |
| 7969 | // either fixed or derived from viewBox) → use those. |
| 7970 | $intrinsic = $this->intrinsicSize($src); |
| 7971 | if ($intrinsic !== null && $intrinsic[0] > 0 && $intrinsic[1] > 0) { |
| 7972 | return [ |
| 7973 | 'w' => (float) $intrinsic[0], |
| 7974 | 'h' => (float) $intrinsic[1], |
| 7975 | 'offsetX' => 0.0, |
| 7976 | 'offsetY' => 0.0, |
| 7977 | ]; |
| 7978 | } |
| 7979 | // Partial intrinsic (SVG with one fixed dim + no |
| 7980 | // viewBox): missing axes fall back to the bg-positioning |
| 7981 | // area dimension (CSS Images 3 §5.2 default object size). |
| 7982 | $partial = $this->intrinsicSizePartial($src); |
| 7983 | $w = $partial['w']; |
| 7984 | $h = $partial['h']; |
| 7985 | if ($w !== null || $h !== null) { |
| 7986 | return [ |
| 7987 | 'w' => $w ?? $boxWidth, |
| 7988 | 'h' => $h ?? $boxHeight, |
| 7989 | 'offsetX' => 0.0, |
| 7990 | 'offsetY' => 0.0, |
| 7991 | ]; |
| 7992 | } |
| 7993 | return ['w' => $boxWidth, 'h' => $boxHeight, 'offsetX' => 0.0, 'offsetY' => 0.0]; |
| 7994 | } |
| 7995 | $keyword = $sizeValue instanceof \Phpdftk\Css\Value\Keyword |
| 7996 | ? strtolower($sizeValue->name) |
| 7997 | : null; |
| 7998 | if ($keyword === 'cover' || $keyword === 'contain') { |
| 7999 | $intrinsic = $this->intrinsicSize($src); |
| 8000 | if ($intrinsic === null) { |
| 8001 | // Fallback to stretch when we can't read natural size. |
| 8002 | return ['w' => $boxWidth, 'h' => $boxHeight, 'offsetX' => 0.0, 'offsetY' => 0.0]; |
| 8003 | } |
| 8004 | [$natW, $natH] = $intrinsic; |
| 8005 | // Extreme viewBox aspect ratios can collapse one axis to |
| 8006 | // zero (CSS Backgrounds 3 §3.9 considers the ratio |
| 8007 | // well-defined, but the derived dimension rounds to 0). |
| 8008 | // `contain` resolves cleanly via INF on the impossible |
| 8009 | // axis — min picks the finite scale and the zero side |
| 8010 | // stays zero — but `cover` would otherwise produce INF |
| 8011 | // dimensions. For cover with a degenerate axis, degrade |
| 8012 | // to stretch so the box is at least covered with finite |
| 8013 | // dimensions. |
| 8014 | if ($keyword === 'cover' && ($natW === 0 || $natH === 0)) { |
| 8015 | return ['w' => $boxWidth, 'h' => $boxHeight, 'offsetX' => 0.0, 'offsetY' => 0.0]; |
| 8016 | } |
| 8017 | $scaleW = $natW > 0 ? $boxWidth / $natW : INF; |
| 8018 | $scaleH = $natH > 0 ? $boxHeight / $natH : INF; |
| 8019 | $scale = $keyword === 'cover' ? max($scaleW, $scaleH) : min($scaleW, $scaleH); |
| 8020 | $finalW = $natW * $scale; |
| 8021 | $finalH = $natH * $scale; |
| 8022 | return [ |
| 8023 | 'w' => $finalW, |
| 8024 | 'h' => $finalH, |
| 8025 | 'offsetX' => ($boxWidth - $finalW) / 2, |
| 8026 | 'offsetY' => ($boxHeight - $finalH) / 2, |
| 8027 | ]; |
| 8028 | } |
| 8029 | // `<length> <length>` — explicit dimensions in a 2-element |
| 8030 | // space-separated ValueList. Per CSS Backgrounds 3 §3.9, when |
| 8031 | // one component is `auto`: |
| 8032 | // • image has intrinsic ratio → derive from the other side |
| 8033 | // • image has no intrinsic ratio → use 100% of the |
| 8034 | // corresponding bg-positioning area dimension |
| 8035 | if ($sizeValue instanceof \Phpdftk\Css\Value\ValueList |
| 8036 | && $sizeValue->separator === \Phpdftk\Css\Value\ListSeparator::Space |
| 8037 | ) { |
| 8038 | $w = $sizeValue->values[0] ?? null; |
| 8039 | $h = $sizeValue->values[1] ?? null; |
| 8040 | $explicitW = $this->backgroundSizeAxisLength($w, $boxWidth); |
| 8041 | $explicitH = $this->backgroundSizeAxisLength($h, $boxHeight); |
| 8042 | [$finalW, $finalH] = $this->resolveAutoSizePair( |
| 8043 | $explicitW, |
| 8044 | $explicitH, |
| 8045 | $src, |
| 8046 | $boxWidth, |
| 8047 | $boxHeight, |
| 8048 | ); |
| 8049 | return [ |
| 8050 | 'w' => $finalW, |
| 8051 | 'h' => $finalH, |
| 8052 | 'offsetX' => max(0.0, ($boxWidth - $finalW) / 2), |
| 8053 | 'offsetY' => max(0.0, ($boxHeight - $finalH) / 2), |
| 8054 | ]; |
| 8055 | } |
| 8056 | // Single-value `background-size`: a bare `<length>` or |
| 8057 | // `<percentage>` sets the width; the second axis defaults to |
| 8058 | // `auto` per CSS Backgrounds 3 §3.9 (derive from intrinsic |
| 8059 | // ratio, or fall back to the bg-positioning-area height). |
| 8060 | $singleW = $this->backgroundSizeAxisLength($sizeValue, $boxWidth); |
| 8061 | if ($singleW !== null) { |
| 8062 | [$finalW, $finalH] = $this->resolveAutoSizePair( |
| 8063 | $singleW, |
| 8064 | null, |
| 8065 | $src, |
| 8066 | $boxWidth, |
| 8067 | $boxHeight, |
| 8068 | ); |
| 8069 | return [ |
| 8070 | 'w' => $finalW, |
| 8071 | 'h' => $finalH, |
| 8072 | 'offsetX' => max(0.0, ($boxWidth - $finalW) / 2), |
| 8073 | 'offsetY' => max(0.0, ($boxHeight - $finalH) / 2), |
| 8074 | ]; |
| 8075 | } |
| 8076 | return ['w' => $boxWidth, 'h' => $boxHeight, 'offsetX' => 0.0, 'offsetY' => 0.0]; |
| 8077 | } |
| 8078 | |
| 8079 | /** |
| 8080 | * Resolve one axis of `background-size` from a single value to a |
| 8081 | * concrete pixel length. Lengths come through as-is; percentages |
| 8082 | * resolve against the bg-positioning area axis (CSS Backgrounds 3 |
| 8083 | * §3.9). Any other value (including `auto` keywords) returns null |
| 8084 | * so the caller can route to the intrinsic-ratio path. |
| 8085 | */ |
| 8086 | private function backgroundSizeAxisLength( |
| 8087 | ?\Phpdftk\Css\Value\Value $value, |
| 8088 | float $axisExtent, |
| 8089 | ): ?float { |
| 8090 | if ($value instanceof \Phpdftk\Css\Value\Length) { |
| 8091 | return $value->value; |
| 8092 | } |
| 8093 | if ($value instanceof \Phpdftk\Css\Value\Percentage) { |
| 8094 | return $value->value / 100.0 * $axisExtent; |
| 8095 | } |
| 8096 | return null; |
| 8097 | } |
| 8098 | |
| 8099 | /** |
| 8100 | * Return true when the `background-size` value resolves to the |
| 8101 | * "fill the box" default. Treated as default: |
| 8102 | * • null (property unset) |
| 8103 | * • single keyword `auto` / unknown |
| 8104 | * • two-value `auto auto` |
| 8105 | * Anything explicit (length, percentage, `cover`, `contain`, |
| 8106 | * `auto <length>`, `<length> auto`) is non-default and the |
| 8107 | * gradient renders at the resolved tile rect. |
| 8108 | */ |
| 8109 | private function isDefaultGradientSize(?\Phpdftk\Css\Value\Value $sizeValue): bool |
| 8110 | { |
| 8111 | if ($sizeValue === null) { |
| 8112 | return true; |
| 8113 | } |
| 8114 | if ($sizeValue instanceof \Phpdftk\Css\Value\Keyword) { |
| 8115 | return strtolower($sizeValue->name) === 'auto'; |
| 8116 | } |
| 8117 | if ($sizeValue instanceof \Phpdftk\Css\Value\ValueList |
| 8118 | && $sizeValue->separator === \Phpdftk\Css\Value\ListSeparator::Space |
| 8119 | ) { |
| 8120 | $allAuto = true; |
| 8121 | foreach ($sizeValue->values as $v) { |
| 8122 | $isAutoKw = $v instanceof \Phpdftk\Css\Value\Keyword |
| 8123 | && strtolower($v->name) === 'auto'; |
| 8124 | if (!$isAutoKw) { |
| 8125 | $allAuto = false; |
| 8126 | break; |
| 8127 | } |
| 8128 | } |
| 8129 | return $allAuto && $sizeValue->values !== []; |
| 8130 | } |
| 8131 | return false; |
| 8132 | } |
| 8133 | |
| 8134 | /** |
| 8135 | * Compute the rect a CSS gradient tile occupies given the |
| 8136 | * background-size + background-position values and the |
| 8137 | * background-positioning area (`background-origin` rect). |
| 8138 | * |
| 8139 | * Gradients have no intrinsic size and no intrinsic ratio, so |
| 8140 | * CSS Backgrounds 3 §3.9 reduces to: |
| 8141 | * • both auto / unset / unknown keyword → 100% × 100% |
| 8142 | * • cover / contain → 100% × 100% |
| 8143 | * • <length> auto → length × 100% height |
| 8144 | * • auto <length> → 100% width × length |
| 8145 | * • <length> <length> → explicit pair |
| 8146 | * Position resolves the tile's offset within the positioning |
| 8147 | * area (CSS Backgrounds 3 §3.6 — keywords / percentages anchor; |
| 8148 | * lengths are direct offsets). |
| 8149 | * |
| 8150 | * Tile a linear gradient across the box when `background-size` makes |
| 8151 | * the tile smaller than the positioning area (CSS Backgrounds 3 §3.9). |
| 8152 | * Mirrors the image tiling loop: resolve the tile size + positioned |
| 8153 | * offset, compute per-axis cell offsets (with `background-repeat`'s |
| 8154 | * repeat / round / space handling via {@see tileOffsets}), and paint |
| 8155 | * the gradient once per cell, each clipped to the box. `no-repeat` |
| 8156 | * reduces to a single positioned tile. |
| 8157 | * |
| 8158 | * @param array{x: float, top: float, width: float, height: float} $originRect |
| 8159 | */ |
| 8160 | private function paintTiledLinearGradient( |
| 8161 | \Phpdftk\Css\Value\LinearGradient $gradient, |
| 8162 | ContentStream $stream, |
| 8163 | float $boxX, |
| 8164 | float $boxTop, |
| 8165 | float $boxWidth, |
| 8166 | float $boxHeight, |
| 8167 | array $originRect, |
| 8168 | ?\Phpdftk\Css\Value\Value $sizeValue, |
| 8169 | ?\Phpdftk\Css\Value\Value $positionValue, |
| 8170 | ?\Phpdftk\Css\Value\Value $repeatValue, |
| 8171 | ): void { |
| 8172 | $grid = $this->gradientTileCells($originRect, $boxX, $boxTop, $boxWidth, $boxHeight, $sizeValue, $positionValue, $repeatValue); |
| 8173 | if ($grid === null) { |
| 8174 | // Degenerate or sub-pixel tile — a dense grid of tiny tiles |
| 8175 | // approximates one box-filling gradient (and avoids blowing the |
| 8176 | // tile cap), so paint it once (e.g. `background-size: 0.2px`). |
| 8177 | $this->paintLinearGradient($gradient, $stream, $boxX, $boxTop, $boxWidth, $boxHeight); |
| 8178 | return; |
| 8179 | } |
| 8180 | // A linear-gradient shading is confined to the tile rect it's built |
| 8181 | // for, so paint each cell clipped to the box (the shading carries |
| 8182 | // its own extent). |
| 8183 | $clip = [$boxX, $boxTop, $boxWidth, $boxHeight]; |
| 8184 | foreach ($grid['cells'] as $cell) { |
| 8185 | $this->paintLinearGradient($gradient, $stream, $cell['x'], $cell['top'], $grid['tileW'], $grid['tileH'], $clip); |
| 8186 | } |
| 8187 | } |
| 8188 | |
| 8189 | /** |
| 8190 | * Compute the tile size and per-cell top-left positions for tiling a |
| 8191 | * gradient across the box under `background-size` / `-position` / |
| 8192 | * `-repeat`. Mirrors the image tiling geometry (back-shift on repeating |
| 8193 | * axes, {@see tileOffsets} for repeat / round / space). Returns null |
| 8194 | * when the tile is degenerate. |
| 8195 | * |
| 8196 | * @param array{x: float, top: float, width: float, height: float} $originRect |
| 8197 | * @return array{tileW: float, tileH: float, cells: list<array{x: float, top: float}>}|null |
| 8198 | */ |
| 8199 | private function gradientTileCells( |
| 8200 | array $originRect, |
| 8201 | float $boxX, |
| 8202 | float $boxTop, |
| 8203 | float $boxWidth, |
| 8204 | float $boxHeight, |
| 8205 | ?\Phpdftk\Css\Value\Value $sizeValue, |
| 8206 | ?\Phpdftk\Css\Value\Value $positionValue, |
| 8207 | ?\Phpdftk\Css\Value\Value $repeatValue, |
| 8208 | ): ?array { |
| 8209 | $originX = $originRect['x']; |
| 8210 | $originTop = $originRect['top']; |
| 8211 | $originWidth = $originRect['width']; |
| 8212 | $originHeight = $originRect['height']; |
| 8213 | $repeat = $this->repeatAxes($repeatValue); |
| 8214 | $modes = $this->repeatModes($repeatValue); |
| 8215 | [$tileW, $tileH] = $this->resolveGradientTileSize($sizeValue, $originWidth, $originHeight); |
| 8216 | // `round` rescales the tile so a whole number fits (same as the |
| 8217 | // image path); apply before computing offsets. |
| 8218 | $tileW = $this->roundTileDim($modes['x'], $tileW, $originWidth); |
| 8219 | $tileH = $this->roundTileDim($modes['y'], $tileH, $originHeight); |
| 8220 | // Degenerate or sub-pixel tiles can't be tiled meaningfully (they'd |
| 8221 | // demand thousands of tiles); the caller falls back to a single fill. |
| 8222 | if ($tileW < 1.0 || $tileH < 1.0) { |
| 8223 | return null; |
| 8224 | } |
| 8225 | $offsets = $positionValue === null |
| 8226 | ? ['offsetX' => max(0.0, ($originWidth - $tileW) / 2), 'offsetY' => max(0.0, ($originHeight - $tileH) / 2)] |
| 8227 | : $this->resolveBackgroundPosition($positionValue, $tileW, $tileH, $originWidth, $originHeight); |
| 8228 | // Back-shift the anchor and extend the far bound to the box edge on |
| 8229 | // repeating axes, exactly as paintBackgroundImage does. |
| 8230 | $startX = $offsets['offsetX']; |
| 8231 | $farX = $originWidth; |
| 8232 | if ($repeat['x']) { |
| 8233 | $farX = $boxX + $boxWidth - $originX; |
| 8234 | while ($originX + $startX > $boxX) { |
| 8235 | $startX -= $tileW; |
| 8236 | } |
| 8237 | } |
| 8238 | $startY = $offsets['offsetY']; |
| 8239 | $farY = $originHeight; |
| 8240 | if ($repeat['y']) { |
| 8241 | $farY = $boxTop + $boxHeight - $originTop; |
| 8242 | while ($originTop + $startY > $boxTop) { |
| 8243 | $startY -= $tileH; |
| 8244 | } |
| 8245 | } |
| 8246 | $xOffsets = $this->tileOffsets($modes['x'], $repeat['x'], $startX, $farX, $tileW, $offsets['offsetX'], $originWidth); |
| 8247 | $yOffsets = $this->tileOffsets($modes['y'], $repeat['y'], $startY, $farY, $tileH, $offsets['offsetY'], $originHeight); |
| 8248 | // Gradient tiles each register a shading pattern, heavier than an |
| 8249 | // XObject draw — cap lower than the image loop. |
| 8250 | $cells = []; |
| 8251 | foreach ($yOffsets as $oy) { |
| 8252 | foreach ($xOffsets as $ox) { |
| 8253 | if (count($cells) >= 512) { |
| 8254 | break 2; |
| 8255 | } |
| 8256 | $cells[] = ['x' => $originX + $ox, 'top' => $originTop + $oy]; |
| 8257 | } |
| 8258 | } |
| 8259 | return ['tileW' => $tileW, 'tileH' => $tileH, 'cells' => $cells]; |
| 8260 | } |
| 8261 | |
| 8262 | /** |
| 8263 | * Resolve a CSS `background-size` value to a concrete (w, h) |
| 8264 | * for a gradient (no intrinsic dimensions, no intrinsic ratio). |
| 8265 | * See {@see gradientTileCells} for how the tile is positioned. |
| 8266 | * |
| 8267 | * @return array{0: float, 1: float} |
| 8268 | */ |
| 8269 | private function resolveGradientTileSize( |
| 8270 | ?\Phpdftk\Css\Value\Value $sizeValue, |
| 8271 | float $originWidth, |
| 8272 | float $originHeight, |
| 8273 | ): array { |
| 8274 | if ($sizeValue === null) { |
| 8275 | return [$originWidth, $originHeight]; |
| 8276 | } |
| 8277 | if ($sizeValue instanceof \Phpdftk\Css\Value\Keyword) { |
| 8278 | $kw = strtolower($sizeValue->name); |
| 8279 | // `cover` / `contain` need an intrinsic ratio to do |
| 8280 | // anything useful; without one they degrade to stretch. |
| 8281 | return [$originWidth, $originHeight]; |
| 8282 | } |
| 8283 | if ($sizeValue instanceof \Phpdftk\Css\Value\Length) { |
| 8284 | // Single length sets width; height = auto = 100% of |
| 8285 | // positioning area (no intrinsic ratio for gradients). |
| 8286 | return [$sizeValue->value, $originHeight]; |
| 8287 | } |
| 8288 | if ($sizeValue instanceof \Phpdftk\Css\Value\ValueList |
| 8289 | && $sizeValue->separator === \Phpdftk\Css\Value\ListSeparator::Space |
| 8290 | ) { |
| 8291 | $w = $sizeValue->values[0] ?? null; |
| 8292 | $h = $sizeValue->values[1] ?? null; |
| 8293 | $tileW = $w instanceof \Phpdftk\Css\Value\Length ? $w->value : $originWidth; |
| 8294 | $tileH = $h instanceof \Phpdftk\Css\Value\Length ? $h->value : $originHeight; |
| 8295 | // Percentage tile dims resolve against the positioning area. |
| 8296 | if ($w instanceof \Phpdftk\Css\Value\Percentage) { |
| 8297 | $tileW = $originWidth * ($w->value / 100.0); |
| 8298 | } |
| 8299 | if ($h instanceof \Phpdftk\Css\Value\Percentage) { |
| 8300 | $tileH = $originHeight * ($h->value / 100.0); |
| 8301 | } |
| 8302 | return [$tileW, $tileH]; |
| 8303 | } |
| 8304 | return [$originWidth, $originHeight]; |
| 8305 | } |
| 8306 | |
| 8307 | /** |
| 8308 | * Resolve a two-component `background-size` where one or both |
| 8309 | * sides may be `auto`. Implements CSS Backgrounds 3 §3.9 auto |
| 8310 | * resolution: intrinsic ratio derives the missing side; if no |
| 8311 | * ratio, auto resolves to 100% of the positioning area. |
| 8312 | * |
| 8313 | * @return array{0: float, 1: float} |
| 8314 | */ |
| 8315 | private function resolveAutoSizePair( |
| 8316 | ?float $explicitW, |
| 8317 | ?float $explicitH, |
| 8318 | string $src, |
| 8319 | float $boxWidth, |
| 8320 | float $boxHeight, |
| 8321 | ): array { |
| 8322 | if ($explicitW !== null && $explicitH !== null) { |
| 8323 | return [$explicitW, $explicitH]; |
| 8324 | } |
| 8325 | // Prefer the FULL intrinsic (raster, or SVG with both axes |
| 8326 | // either fixed or derivable from viewBox). Only fall to the |
| 8327 | // partial helper when no complete intrinsic is available — |
| 8328 | // e.g. an SVG with just one fixed axis and no viewBox. |
| 8329 | $intrinsic = $this->intrinsicSize($src); |
| 8330 | $hasFullIntrinsic = $intrinsic !== null && $intrinsic[0] > 0 && $intrinsic[1] > 0; |
| 8331 | if ($hasFullIntrinsic) { |
| 8332 | $natW = (float) $intrinsic[0]; |
| 8333 | $natH = (float) $intrinsic[1]; |
| 8334 | if ($explicitW === null && $explicitH === null) { |
| 8335 | return [$natW, $natH]; |
| 8336 | } |
| 8337 | if ($explicitW !== null) { |
| 8338 | return [$explicitW, $explicitW * ($natH / $natW)]; |
| 8339 | } |
| 8340 | assert($explicitH !== null); |
| 8341 | return [$explicitH * ($natW / $natH), $explicitH]; |
| 8342 | } |
| 8343 | $partial = $this->intrinsicSizePartial($src); |
| 8344 | $intW = $partial['w']; |
| 8345 | $intH = $partial['h']; |
| 8346 | if ($explicitW === null && $explicitH === null) { |
| 8347 | return [$intW ?? $boxWidth, $intH ?? $boxHeight]; |
| 8348 | } |
| 8349 | if ($explicitW !== null) { |
| 8350 | return [$explicitW, $intH ?? $boxHeight]; |
| 8351 | } |
| 8352 | assert($explicitH !== null); |
| 8353 | return [$intW ?? $boxWidth, $explicitH]; |
| 8354 | } |
| 8355 | |
| 8356 | /** |
| 8357 | * Partial intrinsic dimensions of an image. Unlike |
| 8358 | * {@see intrinsicSize}, this returns nullable per-axis values |
| 8359 | * plus a `hasRatio` flag so callers (notably the `bg-size: auto` |
| 8360 | * branches of {@see resolveBackgroundSize} / {@see resolveAutoSizePair}) |
| 8361 | * can honour SVGs that declare only one of width / height / |
| 8362 | * viewBox per CSS Backgrounds 3 §3.9. For raster images the |
| 8363 | * shape is always full (both axes set, hasRatio derived). |
| 8364 | * |
| 8365 | * @return array{w: ?float, h: ?float, hasRatio: bool} |
| 8366 | */ |
| 8367 | private function intrinsicSizePartial(string $src): array |
| 8368 | { |
| 8369 | if ($this->isSvgSrc($src)) { |
| 8370 | $svg = $this->loadSvgDocument($src); |
| 8371 | if ($svg === null) { |
| 8372 | return ['w' => null, 'h' => null, 'hasRatio' => false]; |
| 8373 | } |
| 8374 | $w = self::parseSvgLengthAttribute($svg->widthAttribute()); |
| 8375 | $h = self::parseSvgLengthAttribute($svg->heightAttribute()); |
| 8376 | $viewBox = $svg->viewBox(); |
| 8377 | // A ratio comes from any of: viewBox, fixed width+height, |
| 8378 | // or viewBox alone — anything that gives both axes |
| 8379 | // mathematically. The earlier `intrinsicSvgSize` already |
| 8380 | // backfills missing axes from ratio, so by the time |
| 8381 | // we're here for "partial intrinsic" we typically have |
| 8382 | // at most one fixed dim. Mirror the same ratio sources. |
| 8383 | $hasRatio = ($viewBox !== null && $viewBox[2] > 0.0 && $viewBox[3] > 0.0) |
| 8384 | || ($w !== null && $h !== null && $h > 0.0); |
| 8385 | return ['w' => $w, 'h' => $h, 'hasRatio' => $hasRatio]; |
| 8386 | } |
| 8387 | $intrinsic = $this->intrinsicSize($src); |
| 8388 | if ($intrinsic === null) { |
| 8389 | return ['w' => null, 'h' => null, 'hasRatio' => false]; |
| 8390 | } |
| 8391 | return [ |
| 8392 | 'w' => (float) $intrinsic[0], |
| 8393 | 'h' => (float) $intrinsic[1], |
| 8394 | 'hasRatio' => $intrinsic[0] > 0 && $intrinsic[1] > 0, |
| 8395 | ]; |
| 8396 | } |
| 8397 | |
| 8398 | /** |
| 8399 | * Read the intrinsic pixel dimensions of an image referenced by an |
| 8400 | * `<img src>` or `background-image: url(...)` value. Tolerates both |
| 8401 | * `data:image/...` URIs and resolved local-file paths via the |
| 8402 | * painter's existing `resolveImageSrc`. Returns null when the bytes |
| 8403 | * can't be read or parsed. |
| 8404 | * |
| 8405 | * @return array{int, int}|null |
| 8406 | */ |
| 8407 | private function intrinsicSize(string $src): ?array |
| 8408 | { |
| 8409 | if ($this->isSvgSrc($src)) { |
| 8410 | $svg = $this->loadSvgDocument($src); |
| 8411 | if ($svg === null) { |
| 8412 | return null; |
| 8413 | } |
| 8414 | return $this->intrinsicSvgSize($svg); |
| 8415 | } |
| 8416 | try { |
| 8417 | if (str_starts_with($src, 'data:image/')) { |
| 8418 | if (preg_match('~^data:image/(png|jpeg|jpg);(base64,)?(.*)$~s', $src, $m) !== 1) { |
| 8419 | return null; |
| 8420 | } |
| 8421 | $payload = $m[2] === 'base64,' |
| 8422 | ? base64_decode($m[3], strict: true) |
| 8423 | : urldecode($m[3]); |
| 8424 | if ($payload === false || $payload === '') { |
| 8425 | return null; |
| 8426 | } |
| 8427 | $info = \Phpdftk\ImageMetadata\ImageParser::parseString($payload); |
| 8428 | } else { |
| 8429 | $resolved = $this->resolveImageSrc($src); |
| 8430 | if ($resolved === null) { |
| 8431 | return null; |
| 8432 | } |
| 8433 | $info = \Phpdftk\ImageMetadata\ImageParser::parse($resolved); |
| 8434 | } |
| 8435 | } catch (\Throwable) { |
| 8436 | return null; |
| 8437 | } |
| 8438 | return [$info->width, $info->height]; |
| 8439 | } |
| 8440 | |
| 8441 | /** |
| 8442 | * Detect SVG background sources: `.svg` URLs and `data:image/svg+xml` |
| 8443 | * URIs. Case-insensitive on the extension to match CSS / file-system |
| 8444 | * conventions. |
| 8445 | */ |
| 8446 | private function isSvgSrc(string $src): bool |
| 8447 | { |
| 8448 | if (str_starts_with(strtolower($src), 'data:image/svg+xml')) { |
| 8449 | return true; |
| 8450 | } |
| 8451 | $path = parse_url($src, PHP_URL_PATH); |
| 8452 | if (!is_string($path) || $path === '') { |
| 8453 | $path = $src; |
| 8454 | } |
| 8455 | return strtolower((string) pathinfo($path, PATHINFO_EXTENSION)) === 'svg'; |
| 8456 | } |
| 8457 | |
| 8458 | /** |
| 8459 | * Parse an SVG background source into an `SvgDocument`, memoising by |
| 8460 | * `$src` so each unique URL is read + parsed once per Painter. Returns |
| 8461 | * `null` on read / parse failure (the caller paints nothing — same |
| 8462 | * fallback as raster sources that fail to parse). |
| 8463 | */ |
| 8464 | private function loadSvgDocument(string $src): ?\Phpdftk\Svg\SvgDocument |
| 8465 | { |
| 8466 | if (array_key_exists($src, $this->svgDocumentCache)) { |
| 8467 | $cached = $this->svgDocumentCache[$src]; |
| 8468 | return $cached === false ? null : $cached; |
| 8469 | } |
| 8470 | $bytes = null; |
| 8471 | try { |
| 8472 | if (str_starts_with($src, 'data:')) { |
| 8473 | $bytes = $this->decodeSvgDataUri($src); |
| 8474 | } else { |
| 8475 | $resolved = $this->resolveImageSrc($src); |
| 8476 | if ($resolved !== null) { |
| 8477 | $bytes = \Phpdftk\Filesystem\LocalFilesystem::readFile($resolved, 'SVG background-image'); |
| 8478 | } |
| 8479 | } |
| 8480 | if ($bytes === null || $bytes === '') { |
| 8481 | $this->svgDocumentCache[$src] = false; |
| 8482 | return null; |
| 8483 | } |
| 8484 | $doc = (new \Phpdftk\Svg\Parser())->parse($bytes); |
| 8485 | } catch (\Throwable) { |
| 8486 | $this->svgDocumentCache[$src] = false; |
| 8487 | return null; |
| 8488 | } |
| 8489 | $this->svgDocumentCache[$src] = $doc; |
| 8490 | return $doc; |
| 8491 | } |
| 8492 | |
| 8493 | private function decodeSvgDataUri(string $src): ?string |
| 8494 | { |
| 8495 | if (preg_match('~^data:image/svg\+xml(?:;[^,]*)?,(.*)$~is', $src, $m) !== 1) { |
| 8496 | return null; |
| 8497 | } |
| 8498 | $payload = $m[1]; |
| 8499 | if (str_contains(strtolower($src), ';base64,')) { |
| 8500 | $decoded = base64_decode($payload, strict: true); |
| 8501 | return $decoded === false ? null : $decoded; |
| 8502 | } |
| 8503 | return rawurldecode($payload); |
| 8504 | } |
| 8505 | |
| 8506 | /** |
| 8507 | * Derive an intrinsic pixel size from an `<svg>` element per |
| 8508 | * CSS Images 3 §5.2: |
| 8509 | * - both width + height set in absolute units → use them |
| 8510 | * - only width + intrinsic aspect ratio → (w, w/aspect) |
| 8511 | * - only height + intrinsic aspect ratio → (h*aspect, h) |
| 8512 | * - viewBox only → viewBox dims |
| 8513 | * - nothing useful → null |
| 8514 | * |
| 8515 | * Returns null when the SVG has no intrinsic dimensions AND no |
| 8516 | * intrinsic ratio. The caller (`resolveBackgroundSize` / friends) |
| 8517 | * then falls back to the background-positioning area for `cover` |
| 8518 | * / `contain` (CSS Backgrounds 3 §3.9 — "no intrinsic ratio → |
| 8519 | * 100% × 100% of the positioning area"). Earlier this method |
| 8520 | * returned `[300, 150]` (the CSS Images 3 §5.3 default object |
| 8521 | * size), but that constant misroutes the cover/contain math for |
| 8522 | * SVGs without intrinsic information. |
| 8523 | * |
| 8524 | * @return array{int, int}|null |
| 8525 | */ |
| 8526 | private function intrinsicSvgSize(\Phpdftk\Svg\SvgDocument $svg): ?array |
| 8527 | { |
| 8528 | $w = self::parseSvgLengthAttribute($svg->widthAttribute()); |
| 8529 | $h = self::parseSvgLengthAttribute($svg->heightAttribute()); |
| 8530 | $viewBox = $svg->viewBox(); |
| 8531 | $aspect = null; |
| 8532 | if ($viewBox !== null && $viewBox[2] > 0.0 && $viewBox[3] > 0.0) { |
| 8533 | $aspect = $viewBox[2] / $viewBox[3]; |
| 8534 | } elseif ($w !== null && $h !== null && $h > 0.0) { |
| 8535 | $aspect = $w / $h; |
| 8536 | } |
| 8537 | if ($w !== null && $h !== null) { |
| 8538 | return [max(1, (int) round($w)), max(1, (int) round($h))]; |
| 8539 | } |
| 8540 | // Derived-from-aspect: keep the clamp on the *explicit* side |
| 8541 | // (so a real `width="8"` survives rounding), but let the |
| 8542 | // derived side fall to zero when an extreme viewBox aspect |
| 8543 | // (e.g. `2147483647:1`) makes the other dimension |
| 8544 | // mathematically negligible. CSS Backgrounds 3 §3.9 then |
| 8545 | // resolves `contain` to a zero-extent tile — matching the |
| 8546 | // browser-visible "renders as empty" outcome that the |
| 8547 | // `tall--contain--height` / `wide--contain--height` reftests |
| 8548 | // expect for SVGs with extreme viewBox aspect ratios. |
| 8549 | if ($w !== null && $aspect !== null && $aspect > 0.0) { |
| 8550 | return [max(1, (int) round($w)), max(0, (int) round($w / $aspect))]; |
| 8551 | } |
| 8552 | if ($h !== null && $aspect !== null && $aspect > 0.0) { |
| 8553 | return [max(0, (int) round($h * $aspect)), max(1, (int) round($h))]; |
| 8554 | } |
| 8555 | if ($viewBox !== null && $viewBox[2] > 0.0 && $viewBox[3] > 0.0) { |
| 8556 | return [max(1, (int) round($viewBox[2])), max(1, (int) round($viewBox[3]))]; |
| 8557 | } |
| 8558 | return null; |
| 8559 | } |
| 8560 | |
| 8561 | /** |
| 8562 | * Parse an SVG length attribute like `"8"`, `"8px"`, `"50%"`. Returns |
| 8563 | * a float when the value is an absolute length (with no unit or `px`); |
| 8564 | * returns null for percentages, em / rem / vw etc. — those aren't |
| 8565 | * intrinsic for sizing purposes (CSS Images 3 §5.2). |
| 8566 | */ |
| 8567 | private static function parseSvgLengthAttribute(?string $raw): ?float |
| 8568 | { |
| 8569 | if ($raw === null) { |
| 8570 | return null; |
| 8571 | } |
| 8572 | $raw = trim($raw); |
| 8573 | if ($raw === '') { |
| 8574 | return null; |
| 8575 | } |
| 8576 | if (preg_match('/^(-?\d+(?:\.\d+)?)(px)?$/', $raw, $m) !== 1) { |
| 8577 | return null; |
| 8578 | } |
| 8579 | return (float) $m[1]; |
| 8580 | } |
| 8581 | |
| 8582 | /** |
| 8583 | * Paint a CSS `border-image` 9-slice grid in place of the per-side |
| 8584 | * border colours/styles (CSS Backgrounds 3 §6). Returns true when |
| 8585 | * a border-image was painted; the caller skips legacy border |
| 8586 | * painting in that case. |
| 8587 | * |
| 8588 | * Phase-1 scope: |
| 8589 | * • `border-image-source`: `url(...)` raster (PNG/JPG) only |
| 8590 | * • `border-image-slice`: a single number (px from each edge) |
| 8591 | * or `<n> fill` — single-percentage and four-value variants |
| 8592 | * are a follow-up |
| 8593 | * • `border-image-width`: implicit (use the box's border-width) |
| 8594 | * • `border-image-outset`: implicit (zero) |
| 8595 | * • `border-image-repeat`: `stretch` (initial), `repeat`, `round` |
| 8596 | * |
| 8597 | * Anything outside that surface falls through to the legacy |
| 8598 | * paint-borders path. |
| 8599 | */ |
| 8600 | private function paintBorderImage(Box $box, ContentStream $stream): bool |
| 8601 | { |
| 8602 | if ($this->writer === null || $this->page === null) { |
| 8603 | return false; |
| 8604 | } |
| 8605 | $source = $box->style->get('border-image-source'); |
| 8606 | if (!$source instanceof \Phpdftk\Css\Value\Url) { |
| 8607 | return false; |
| 8608 | } |
| 8609 | // Raster only for the first cut — SVG border-image needs the |
| 8610 | // SvgRenderer slicing path, deferred. |
| 8611 | if ($this->isSvgSrc($source->url)) { |
| 8612 | return false; |
| 8613 | } |
| 8614 | if (isset($this->imageNameCache[$source->url])) { |
| 8615 | $name = $this->imageNameCache[$source->url]; |
| 8616 | } else { |
| 8617 | $resolved = $this->resolveImageSrc($source->url); |
| 8618 | if ($resolved === null) { |
| 8619 | return false; |
| 8620 | } |
| 8621 | try { |
| 8622 | $name = $this->writer->addImage($resolved, $this->page); |
| 8623 | } catch (\Throwable) { |
| 8624 | return false; |
| 8625 | } |
| 8626 | $this->imageNameCache[$source->url] = $name; |
| 8627 | } |
| 8628 | $intrinsic = $this->intrinsicSize($source->url); |
| 8629 | if ($intrinsic === null) { |
| 8630 | return false; |
| 8631 | } |
| 8632 | [$srcW, $srcH] = $intrinsic; |
| 8633 | if ($srcW <= 0 || $srcH <= 0) { |
| 8634 | return false; |
| 8635 | } |
| 8636 | // Slice dimensions: 1–4 values in `<number>` / `<length>` / |
| 8637 | // `<percentage>`, applied to top/right/bottom/left in the |
| 8638 | // standard "TRBL fill-in" rule (CSS Backgrounds 3 §6.4.3). |
| 8639 | // Horizontal slices (top, bottom) resolve their percentages |
| 8640 | // against the image's height; vertical slices (left, right) |
| 8641 | // resolve against width. |
| 8642 | $sliceValue = $box->style->get('border-image-slice'); |
| 8643 | $slices = $this->resolveBorderImageSliceSides($sliceValue, (float) $srcW, (float) $srcH); |
| 8644 | if ($slices === null) { |
| 8645 | return false; |
| 8646 | } |
| 8647 | [$st, $sr, $sb, $sl] = $slices; |
| 8648 | $st = min($st, (float) $srcH / 2.0); |
| 8649 | $sb = min($sb, (float) $srcH / 2.0); |
| 8650 | $sl = min($sl, (float) $srcW / 2.0); |
| 8651 | $sr = min($sr, (float) $srcW / 2.0); |
| 8652 | // `border-image-slice ... fill` keeps the middle image region and |
| 8653 | // paints it into the content box (CSS Backgrounds 3 §6.2). With |
| 8654 | // `slice: 0 fill` every edge slice is zero yet the middle must still |
| 8655 | // paint, so don't bail on all-zero slices when `fill` is present. |
| 8656 | $hasFill = $this->borderImageSliceHasFill($sliceValue); |
| 8657 | if (!$hasFill && $st <= 0.0 && $sr <= 0.0 && $sb <= 0.0 && $sl <= 0.0) { |
| 8658 | return false; |
| 8659 | } |
| 8660 | |
| 8661 | [$repeatH, $repeatV] = $this->parseBorderImageRepeatModes($box->style->get('border-image-repeat')); |
| 8662 | |
| 8663 | // Destination border area: the box's border-box rect, grown by |
| 8664 | // `border-image-outset` (CSS Backgrounds 3 §6.6 — extends the area |
| 8665 | // outward past the border edge, into the margin). |
| 8666 | $geo = $box->geometry; |
| 8667 | $bx = $geo->x - $geo->paddingLeft - $geo->borderLeft; |
| 8668 | $by = $geo->y - $geo->paddingTop - $geo->borderTop; |
| 8669 | $bw = $geo->paddingLeft + $geo->width + $geo->paddingRight |
| 8670 | + $geo->borderLeft + $geo->borderRight; |
| 8671 | $bh = $geo->paddingTop + $geo->height + $geo->paddingBottom |
| 8672 | + $geo->borderTop + $geo->borderBottom; |
| 8673 | [$ot, $or, $ob, $ol] = $this->resolveBorderImageOutset( |
| 8674 | $box->style->get('border-image-outset'), |
| 8675 | $geo->borderTop, |
| 8676 | $geo->borderRight, |
| 8677 | $geo->borderBottom, |
| 8678 | $geo->borderLeft, |
| 8679 | ); |
| 8680 | $bx -= $ol; |
| 8681 | $by -= $ot; |
| 8682 | $bw += $ol + $or; |
| 8683 | $bh += $ot + $ob; |
| 8684 | // `border-image-width` sizes the destination border slices; it |
| 8685 | // defaults to the border-widths but may be a multiple / length / |
| 8686 | // percentage that extends inward past the border into the padding. |
| 8687 | [$bt, $br, $bb, $bl] = $this->resolveBorderImageWidth( |
| 8688 | $box->style->get('border-image-width'), |
| 8689 | $geo->borderTop, |
| 8690 | $geo->borderRight, |
| 8691 | $geo->borderBottom, |
| 8692 | $geo->borderLeft, |
| 8693 | $bw, |
| 8694 | $bh, |
| 8695 | ); |
| 8696 | if ($bw <= 0.0 || $bh <= 0.0) { |
| 8697 | return false; |
| 8698 | } |
| 8699 | |
| 8700 | // 9 destination + source rects. Source coords use the SVG/PNG |
| 8701 | // convention: (0, 0) top-left, y grows down. Destination coords |
| 8702 | // here are layout-space (Y down too); we convert to PDF |
| 8703 | // (Y up) inside `emitImageSlice`. |
| 8704 | $midSrcW = max(0.0, (float) $srcW - $sl - $sr); |
| 8705 | $midSrcH = max(0.0, (float) $srcH - $st - $sb); |
| 8706 | $midDstW = max(0.0, $bw - $bl - $br); |
| 8707 | $midDstH = max(0.0, $bh - $bt - $bb); |
| 8708 | |
| 8709 | // Corners — always stretched (no tile / round per spec §6.3). |
| 8710 | $this->emitImageSlice($stream, $name, $srcW, $srcH, 0.0, 0.0, $sl, $st, $bx, $by, $bl, $bt); |
| 8711 | $this->emitImageSlice($stream, $name, $srcW, $srcH, (float) $srcW - $sr, 0.0, $sr, $st, $bx + $bw - $br, $by, $br, $bt); |
| 8712 | $this->emitImageSlice($stream, $name, $srcW, $srcH, 0.0, (float) $srcH - $sb, $sl, $sb, $bx, $by + $bh - $bb, $bl, $bb); |
| 8713 | $this->emitImageSlice($stream, $name, $srcW, $srcH, (float) $srcW - $sr, (float) $srcH - $sb, $sr, $sb, $bx + $bw - $br, $by + $bh - $bb, $br, $bb); |
| 8714 | |
| 8715 | // Edges — apply repeat mode to the tile axis only. Each edge also |
| 8716 | // needs a non-zero SOURCE slice thickness ($st/$sb for the |
| 8717 | // horizontal edges, $sl/$sr for the vertical ones); a zero-thickness |
| 8718 | // slice (e.g. `slice: 0 fill`) has no edge image to sample and would |
| 8719 | // divide by zero in emitImageEdge. |
| 8720 | if ($midSrcW > 0.0 && $midDstW > 0.0 && $bt > 0.0 && $st > 0.0) { |
| 8721 | $this->emitImageEdge( |
| 8722 | $stream, |
| 8723 | $name, |
| 8724 | $srcW, |
| 8725 | $srcH, |
| 8726 | $sl, |
| 8727 | 0.0, |
| 8728 | $midSrcW, |
| 8729 | $st, |
| 8730 | $bx + $bl, |
| 8731 | $by, |
| 8732 | $midDstW, |
| 8733 | $bt, |
| 8734 | $repeatH, |
| 8735 | horizontal: true, |
| 8736 | ); |
| 8737 | } |
| 8738 | if ($midSrcW > 0.0 && $midDstW > 0.0 && $bb > 0.0 && $sb > 0.0) { |
| 8739 | $this->emitImageEdge( |
| 8740 | $stream, |
| 8741 | $name, |
| 8742 | $srcW, |
| 8743 | $srcH, |
| 8744 | $sl, |
| 8745 | (float) $srcH - $sb, |
| 8746 | $midSrcW, |
| 8747 | $sb, |
| 8748 | $bx + $bl, |
| 8749 | $by + $bh - $bb, |
| 8750 | $midDstW, |
| 8751 | $bb, |
| 8752 | $repeatH, |
| 8753 | horizontal: true, |
| 8754 | ); |
| 8755 | } |
| 8756 | if ($midSrcH > 0.0 && $midDstH > 0.0 && $bl > 0.0 && $sl > 0.0) { |
| 8757 | $this->emitImageEdge( |
| 8758 | $stream, |
| 8759 | $name, |
| 8760 | $srcW, |
| 8761 | $srcH, |
| 8762 | 0.0, |
| 8763 | $st, |
| 8764 | $sl, |
| 8765 | $midSrcH, |
| 8766 | $bx, |
| 8767 | $by + $bt, |
| 8768 | $bl, |
| 8769 | $midDstH, |
| 8770 | $repeatV, |
| 8771 | horizontal: false, |
| 8772 | ); |
| 8773 | } |
| 8774 | if ($midSrcH > 0.0 && $midDstH > 0.0 && $br > 0.0 && $sr > 0.0) { |
| 8775 | $this->emitImageEdge( |
| 8776 | $stream, |
| 8777 | $name, |
| 8778 | $srcW, |
| 8779 | $srcH, |
| 8780 | (float) $srcW - $sr, |
| 8781 | $st, |
| 8782 | $sr, |
| 8783 | $midSrcH, |
| 8784 | $bx + $bw - $br, |
| 8785 | $by + $bt, |
| 8786 | $br, |
| 8787 | $midDstH, |
| 8788 | $repeatV, |
| 8789 | horizontal: false, |
| 8790 | ); |
| 8791 | } |
| 8792 | |
| 8793 | // Middle fill (region 5) — CSS Backgrounds 3 §6.2 `fill`. The middle |
| 8794 | // image is drawn into the box's content area governed by the same |
| 8795 | // repeat modes as the edges: `stretch` scales it to fill; `repeat` / |
| 8796 | // `round` / `space` tile it at its natural (intrinsic) size, centred, |
| 8797 | // and clip to the content area — so an over-large middle shows only |
| 8798 | // its centre. |
| 8799 | if ($hasFill |
| 8800 | && $midSrcW > 0.0 && $midSrcH > 0.0 |
| 8801 | && $midDstW > 0.0 && $midDstH > 0.0 |
| 8802 | ) { |
| 8803 | $this->emitImageMiddleFill( |
| 8804 | $stream, |
| 8805 | $name, |
| 8806 | $srcW, |
| 8807 | $srcH, |
| 8808 | $sl, |
| 8809 | $st, |
| 8810 | $midSrcW, |
| 8811 | $midSrcH, |
| 8812 | $bx + $bl, |
| 8813 | $by + $bt, |
| 8814 | $midDstW, |
| 8815 | $midDstH, |
| 8816 | $repeatH, |
| 8817 | $repeatV, |
| 8818 | ); |
| 8819 | } |
| 8820 | return true; |
| 8821 | } |
| 8822 | |
| 8823 | /** |
| 8824 | * Paint the `border-image` middle region (the `fill` keyword) into the |
| 8825 | * content area, tiling per axis. `stretch` scales the middle to fill that |
| 8826 | * axis; `repeat`/`round`/`space` tile it at its intrinsic size (the layout |
| 8827 | * geometry is in CSS px, so 1 source px = 1 unit), centred and clipped to |
| 8828 | * the content area. |
| 8829 | */ |
| 8830 | private function emitImageMiddleFill( |
| 8831 | ContentStream $stream, |
| 8832 | string $imageName, |
| 8833 | int $srcW, |
| 8834 | int $srcH, |
| 8835 | float $sx, |
| 8836 | float $sy, |
| 8837 | float $sw, |
| 8838 | float $sh, |
| 8839 | float $dx, |
| 8840 | float $dy, |
| 8841 | float $dw, |
| 8842 | float $dh, |
| 8843 | string $repeatH, |
| 8844 | string $repeatV, |
| 8845 | ): void { |
| 8846 | if ($sw <= 0.0 || $sh <= 0.0 || $dw <= 0.0 || $dh <= 0.0) { |
| 8847 | return; |
| 8848 | } |
| 8849 | [$tileW, $offX] = $this->borderImageFillAxis($repeatH, $dw, $sw); |
| 8850 | [$tileH, $offY] = $this->borderImageFillAxis($repeatV, $dh, $sh); |
| 8851 | if ($tileW <= 0.0 || $tileH <= 0.0 || $offX === [] || $offY === []) { |
| 8852 | return; |
| 8853 | } |
| 8854 | $pdfDy = $this->pageHeight - $dy - $dh; |
| 8855 | $stream->saveGraphicsState(); |
| 8856 | $stream->rectangle($dx, $pdfDy, $dw, $dh); |
| 8857 | $stream->clip(); |
| 8858 | $stream->endPath(); |
| 8859 | foreach ($offY as $oy) { |
| 8860 | foreach ($offX as $ox) { |
| 8861 | $this->emitImageSlice( |
| 8862 | $stream, |
| 8863 | $imageName, |
| 8864 | $srcW, |
| 8865 | $srcH, |
| 8866 | $sx, |
| 8867 | $sy, |
| 8868 | $sw, |
| 8869 | $sh, |
| 8870 | $dx + $ox, |
| 8871 | $dy + $oy, |
| 8872 | $tileW, |
| 8873 | $tileH, |
| 8874 | ); |
| 8875 | } |
| 8876 | } |
| 8877 | $stream->restoreGraphicsState(); |
| 8878 | } |
| 8879 | |
| 8880 | /** |
| 8881 | * Tile-placement for one axis of the border-image middle fill. Returns |
| 8882 | * `[tileLength, [offsets…]]` in the destination axis. Mirrors the edge |
| 8883 | * repeat rules (CSS Backgrounds 3 §6.2): `stretch` → one dest-spanning |
| 8884 | * tile; `round` → rescaled to a whole count; `space` → whole tiles with |
| 8885 | * distributed gaps; `repeat` → natural size, centred, partial tiles clipped. |
| 8886 | * |
| 8887 | * @return array{0: float, 1: list<float>} |
| 8888 | */ |
| 8889 | private function borderImageFillAxis(string $mode, float $axisDest, float $natLen): array |
| 8890 | { |
| 8891 | if ($mode === 'stretch' || $natLen <= 0.0) { |
| 8892 | return [$axisDest, [0.0]]; |
| 8893 | } |
| 8894 | if ($mode === 'round') { |
| 8895 | $n = max(1, (int) round($axisDest / $natLen)); |
| 8896 | $tile = $axisDest / $n; |
| 8897 | $offsets = []; |
| 8898 | for ($i = 0; $i < $n; $i++) { |
| 8899 | $offsets[] = $i * $tile; |
| 8900 | } |
| 8901 | return [$tile, $offsets]; |
| 8902 | } |
| 8903 | if ($mode === 'space') { |
| 8904 | $n = (int) floor($axisDest / $natLen + 1e-6); |
| 8905 | if ($n < 1) { |
| 8906 | return [$natLen, []]; |
| 8907 | } |
| 8908 | $gap = ($axisDest - $n * $natLen) / ($n + 1); |
| 8909 | $offsets = []; |
| 8910 | for ($i = 0; $i < $n; $i++) { |
| 8911 | $offsets[] = ($i + 1) * $gap + $i * $natLen; |
| 8912 | } |
| 8913 | return [$natLen, $offsets]; |
| 8914 | } |
| 8915 | // repeat — natural tile, centred, partial end tiles clipped. |
| 8916 | $remainder = fmod($axisDest, $natLen); |
| 8917 | $start = $remainder > 1e-6 ? -($natLen - $remainder) / 2.0 : 0.0; |
| 8918 | $offsets = []; |
| 8919 | for ($pos = $start; $pos < $axisDest - 1e-6 && count($offsets) < 4096; $pos += $natLen) { |
| 8920 | $offsets[] = $pos; |
| 8921 | } |
| 8922 | return [$natLen, $offsets]; |
| 8923 | } |
| 8924 | |
| 8925 | /** |
| 8926 | * Whether a `border-image-slice` value carries the `fill` keyword, which |
| 8927 | * preserves and paints the middle image region into the content box |
| 8928 | * (CSS Backgrounds 3 §6.2). |
| 8929 | */ |
| 8930 | private function borderImageSliceHasFill(?\Phpdftk\Css\Value\Value $value): bool |
| 8931 | { |
| 8932 | if ($value instanceof \Phpdftk\Css\Value\Keyword) { |
| 8933 | return strtolower($value->name) === 'fill'; |
| 8934 | } |
| 8935 | if ($value instanceof \Phpdftk\Css\Value\ValueList) { |
| 8936 | foreach ($value->values as $v) { |
| 8937 | if ($v instanceof \Phpdftk\Css\Value\Keyword |
| 8938 | && strtolower($v->name) === 'fill' |
| 8939 | ) { |
| 8940 | return true; |
| 8941 | } |
| 8942 | } |
| 8943 | } |
| 8944 | return false; |
| 8945 | } |
| 8946 | |
| 8947 | /** |
| 8948 | * Emit a single image slice — the source rect (sx, sy, sw, sh) in |
| 8949 | * source pixel coords lands at destination rect (dx, dy, dw, dh) |
| 8950 | * in layout coords. Stretched (no tiling) — used for corners. |
| 8951 | */ |
| 8952 | private function emitImageSlice( |
| 8953 | ContentStream $stream, |
| 8954 | string $imageName, |
| 8955 | int $srcW, |
| 8956 | int $srcH, |
| 8957 | float $sx, |
| 8958 | float $sy, |
| 8959 | float $sw, |
| 8960 | float $sh, |
| 8961 | float $dx, |
| 8962 | float $dy, |
| 8963 | float $dw, |
| 8964 | float $dh, |
| 8965 | ): void { |
| 8966 | if ($sw <= 0.0 || $sh <= 0.0 || $dw <= 0.0 || $dh <= 0.0) { |
| 8967 | return; |
| 8968 | } |
| 8969 | // PDF y is up; image unit-y=0 is bottom (after the y-flip |
| 8970 | // implicit in addImage). Source rect's bottom in source-px: |
| 8971 | // `srcH - (sy + sh)`. Place the FULL image such that this |
| 8972 | // bottom-of-slice falls on PDF dy. |
| 8973 | $pdfDy = $this->pageHeight - $dy - $dh; |
| 8974 | $sliceBotSrc = (float) $srcH - $sy - $sh; |
| 8975 | $scaleX = $dw * (float) $srcW / $sw; |
| 8976 | $scaleY = $dh * (float) $srcH / $sh; |
| 8977 | $tx = $dx - $dw * $sx / $sw; |
| 8978 | $ty = $pdfDy - $dh * $sliceBotSrc / $sh; |
| 8979 | $stream->saveGraphicsState(); |
| 8980 | $stream->rectangle($dx, $pdfDy, $dw, $dh); |
| 8981 | $stream->clip(); |
| 8982 | $stream->endPath(); |
| 8983 | $stream->concatMatrix($scaleX, 0.0, 0.0, $scaleY, $tx, $ty); |
| 8984 | $stream->doXObject($imageName); |
| 8985 | $stream->restoreGraphicsState(); |
| 8986 | } |
| 8987 | |
| 8988 | /** |
| 8989 | * Emit an edge slice (top/right/bottom/left) of a border-image. |
| 8990 | * `horizontal: true` tiles along the X axis; false tiles along Y. |
| 8991 | * `repeatMode`: 'stretch' (default) — single stretched draw; |
| 8992 | * 'repeat' — tile at natural size from the leading edge; 'round' |
| 8993 | * — scale-to-fit-whole-tiles. |
| 8994 | */ |
| 8995 | private function emitImageEdge( |
| 8996 | ContentStream $stream, |
| 8997 | string $imageName, |
| 8998 | int $srcW, |
| 8999 | int $srcH, |
| 9000 | float $sx, |
| 9001 | float $sy, |
| 9002 | float $sw, |
| 9003 | float $sh, |
| 9004 | float $dx, |
| 9005 | float $dy, |
| 9006 | float $dw, |
| 9007 | float $dh, |
| 9008 | string $repeatMode, |
| 9009 | bool $horizontal, |
| 9010 | ): void { |
| 9011 | if ($repeatMode === 'stretch') { |
| 9012 | $this->emitImageSlice($stream, $imageName, $srcW, $srcH, $sx, $sy, $sw, $sh, $dx, $dy, $dw, $dh); |
| 9013 | return; |
| 9014 | } |
| 9015 | // Natural tile length along the variable axis (the source edge |
| 9016 | // slice scaled to the border thickness); the other dim is fixed. |
| 9017 | $tileLen = $horizontal ? $dh * $sw / $sh : $dw * $sh / $sw; |
| 9018 | $axisDest = $horizontal ? $dw : $dh; |
| 9019 | if ($tileLen <= 0.0 || $axisDest <= 0.0) { |
| 9020 | return; |
| 9021 | } |
| 9022 | // Per CSS Backgrounds 3 §6.2, compute the tile start offsets along |
| 9023 | // the axis for each repeat mode: |
| 9024 | // round — rescale so a whole number fits, butted, no gaps. |
| 9025 | // space — as many whole tiles as fit, leftover distributed as |
| 9026 | // equal gaps BETWEEN and AROUND the tiles ((n+1) gaps), |
| 9027 | // so a single tile is centred; no whole tile → nothing. |
| 9028 | // repeat — natural size, the tiling centred and partial end |
| 9029 | // tiles clipped. |
| 9030 | $offsets = []; |
| 9031 | if ($repeatMode === 'round') { |
| 9032 | $n = max(1, (int) round($axisDest / $tileLen)); |
| 9033 | $tileLen = $axisDest / $n; |
| 9034 | for ($i = 0; $i < $n; $i++) { |
| 9035 | $offsets[] = $i * $tileLen; |
| 9036 | } |
| 9037 | } elseif ($repeatMode === 'space') { |
| 9038 | $n = (int) floor($axisDest / $tileLen + 1e-6); |
| 9039 | if ($n < 1) { |
| 9040 | return; |
| 9041 | } |
| 9042 | $gap = ($axisDest - $n * $tileLen) / ($n + 1); |
| 9043 | for ($i = 0; $i < $n; $i++) { |
| 9044 | $offsets[] = ($i + 1) * $gap + $i * $tileLen; |
| 9045 | } |
| 9046 | } else { |
| 9047 | $remainder = fmod($axisDest, $tileLen); |
| 9048 | $start = $remainder > 1e-6 ? -($tileLen - $remainder) / 2.0 : 0.0; |
| 9049 | for ($pos = $start; $pos < $axisDest - 1e-6 && count($offsets) < 4096; $pos += $tileLen) { |
| 9050 | $offsets[] = $pos; |
| 9051 | } |
| 9052 | } |
| 9053 | // Clip to the destination edge so partial / spaced tiles crop cleanly. |
| 9054 | $pdfDy = $this->pageHeight - $dy - $dh; |
| 9055 | $stream->saveGraphicsState(); |
| 9056 | $stream->rectangle($dx, $pdfDy, $dw, $dh); |
| 9057 | $stream->clip(); |
| 9058 | $stream->endPath(); |
| 9059 | foreach ($offsets as $off) { |
| 9060 | if ($horizontal) { |
| 9061 | $this->emitImageSlice($stream, $imageName, $srcW, $srcH, $sx, $sy, $sw, $sh, $dx + $off, $dy, $tileLen, $dh); |
| 9062 | } else { |
| 9063 | $this->emitImageSlice($stream, $imageName, $srcW, $srcH, $sx, $sy, $sw, $sh, $dx, $dy + $off, $dw, $tileLen); |
| 9064 | } |
| 9065 | } |
| 9066 | $stream->restoreGraphicsState(); |
| 9067 | } |
| 9068 | |
| 9069 | private function parseBorderImageSliceNumber(?\Phpdftk\Css\Value\Value $value): ?float |
| 9070 | { |
| 9071 | if ($value instanceof \Phpdftk\Css\Value\Number |
| 9072 | || $value instanceof \Phpdftk\Css\Value\Integer |
| 9073 | ) { |
| 9074 | return (float) $value->value; |
| 9075 | } |
| 9076 | if ($value instanceof \Phpdftk\Css\Value\Length) { |
| 9077 | return $value->value; |
| 9078 | } |
| 9079 | // Single number wrapped in a ValueList with an optional `fill` |
| 9080 | // keyword — accept the leading number; the `fill` middle paint |
| 9081 | // is a follow-up. |
| 9082 | if ($value instanceof \Phpdftk\Css\Value\ValueList && $value->values !== []) { |
| 9083 | return $this->parseBorderImageSliceNumber($value->values[0]); |
| 9084 | } |
| 9085 | return null; |
| 9086 | } |
| 9087 | |
| 9088 | /** |
| 9089 | * Resolve a single `border-image-slice` component (number, length |
| 9090 | * or percentage). Percentages resolve against the supplied axis |
| 9091 | * extent per CSS Backgrounds 3 §6.4.3. Returns null when the value |
| 9092 | * isn't a slice-shape we recognise. |
| 9093 | */ |
| 9094 | private function resolveBorderImageSliceComponent( |
| 9095 | ?\Phpdftk\Css\Value\Value $value, |
| 9096 | float $axisExtent, |
| 9097 | ): ?float { |
| 9098 | if ($value instanceof \Phpdftk\Css\Value\Percentage) { |
| 9099 | return $value->value / 100.0 * $axisExtent; |
| 9100 | } |
| 9101 | return $this->parseBorderImageSliceNumber($value); |
| 9102 | } |
| 9103 | |
| 9104 | /** |
| 9105 | * Expand the 1–4-value `border-image-slice` shorthand into the |
| 9106 | * per-side `[top, right, bottom, left]` tuple. Drops a trailing |
| 9107 | * `fill` keyword (handled separately when middle-fill paint |
| 9108 | * lands). |
| 9109 | * |
| 9110 | * @return array{0:float, 1:float, 2:float, 3:float}|null |
| 9111 | */ |
| 9112 | private function resolveBorderImageSliceSides( |
| 9113 | ?\Phpdftk\Css\Value\Value $value, |
| 9114 | float $srcW, |
| 9115 | float $srcH, |
| 9116 | ): ?array { |
| 9117 | $components = []; |
| 9118 | if ($value instanceof \Phpdftk\Css\Value\ValueList |
| 9119 | && $value->separator === \Phpdftk\Css\Value\ListSeparator::Space |
| 9120 | ) { |
| 9121 | foreach ($value->values as $v) { |
| 9122 | if ($v instanceof \Phpdftk\Css\Value\Keyword |
| 9123 | && strtolower($v->name) === 'fill' |
| 9124 | ) { |
| 9125 | continue; |
| 9126 | } |
| 9127 | $components[] = $v; |
| 9128 | } |
| 9129 | } elseif ($value !== null) { |
| 9130 | $components[] = $value; |
| 9131 | } |
| 9132 | if ($components === []) { |
| 9133 | return null; |
| 9134 | } |
| 9135 | // Horizontal slices (top, bottom) resolve `%` against srcH; |
| 9136 | // vertical (right, left) against srcW. |
| 9137 | $sides = [ |
| 9138 | 'top' => $this->resolveBorderImageSliceComponent($components[0], $srcH), |
| 9139 | ]; |
| 9140 | if (isset($components[1])) { |
| 9141 | $sides['right'] = $this->resolveBorderImageSliceComponent($components[1], $srcW); |
| 9142 | } else { |
| 9143 | $sides['right'] = $sides['top']; |
| 9144 | } |
| 9145 | if (isset($components[2])) { |
| 9146 | $sides['bottom'] = $this->resolveBorderImageSliceComponent($components[2], $srcH); |
| 9147 | } else { |
| 9148 | $sides['bottom'] = $sides['top']; |
| 9149 | } |
| 9150 | if (isset($components[3])) { |
| 9151 | $sides['left'] = $this->resolveBorderImageSliceComponent($components[3], $srcW); |
| 9152 | } else { |
| 9153 | $sides['left'] = $sides['right']; |
| 9154 | } |
| 9155 | foreach ($sides as $side) { |
| 9156 | if ($side === null) { |
| 9157 | return null; |
| 9158 | } |
| 9159 | } |
| 9160 | return [$sides['top'], $sides['right'], $sides['bottom'], $sides['left']]; |
| 9161 | } |
| 9162 | |
| 9163 | /** |
| 9164 | * Resolve `border-image-width` to the per-side used widths `[top, right, |
| 9165 | * bottom, left]` of the destination border-image area. A `<number>` is a |
| 9166 | * multiple of the corresponding computed border-width; `<length>` is |
| 9167 | * absolute; `<percentage>` is relative to the border-image area (its |
| 9168 | * height for the top/bottom edges, its width for left/right); `auto` |
| 9169 | * falls back to the border-width. Opposite pairs that overflow the area |
| 9170 | * are reduced together (CSS Backgrounds 3 §6.5). Unset → the border |
| 9171 | * widths (the initial `1`). |
| 9172 | * |
| 9173 | * @return array{0: float, 1: float, 2: float, 3: float} |
| 9174 | */ |
| 9175 | private function resolveBorderImageWidth( |
| 9176 | ?\Phpdftk\Css\Value\Value $value, |
| 9177 | float $borderTop, |
| 9178 | float $borderRight, |
| 9179 | float $borderBottom, |
| 9180 | float $borderLeft, |
| 9181 | float $areaWidth, |
| 9182 | float $areaHeight, |
| 9183 | ): array { |
| 9184 | $borders = [$borderTop, $borderRight, $borderBottom, $borderLeft]; |
| 9185 | // Top/bottom offsets are vertical → resolve `%` against the area |
| 9186 | // height; left/right are horizontal → against the width. |
| 9187 | $areaForEdge = [$areaHeight, $areaWidth, $areaHeight, $areaWidth]; |
| 9188 | $components = []; |
| 9189 | if ($value instanceof \Phpdftk\Css\Value\ValueList |
| 9190 | && $value->separator === \Phpdftk\Css\Value\ListSeparator::Space |
| 9191 | ) { |
| 9192 | $components = $value->values; |
| 9193 | } elseif ($value !== null) { |
| 9194 | $components = [$value]; |
| 9195 | } |
| 9196 | // TRBL fill-in. |
| 9197 | $sides = [ |
| 9198 | $components[0] ?? null, |
| 9199 | $components[1] ?? ($components[0] ?? null), |
| 9200 | $components[2] ?? ($components[0] ?? null), |
| 9201 | $components[3] ?? ($components[1] ?? ($components[0] ?? null)), |
| 9202 | ]; |
| 9203 | $resolveOne = static function (?\Phpdftk\Css\Value\Value $v, int $edge) use ($borders, $areaForEdge): float { |
| 9204 | if ($v instanceof \Phpdftk\Css\Value\Keyword && strtolower($v->name) === 'auto') { |
| 9205 | return $borders[$edge]; |
| 9206 | } |
| 9207 | if ($v instanceof \Phpdftk\Css\Value\Number || $v instanceof \Phpdftk\Css\Value\Integer) { |
| 9208 | return max(0.0, (float) $v->value) * $borders[$edge]; |
| 9209 | } |
| 9210 | if ($v instanceof \Phpdftk\Css\Value\Length) { |
| 9211 | return max(0.0, $v->value); |
| 9212 | } |
| 9213 | if ($v instanceof \Phpdftk\Css\Value\Percentage) { |
| 9214 | return max(0.0, $areaForEdge[$edge] * $v->value / 100.0); |
| 9215 | } |
| 9216 | return $borders[$edge]; |
| 9217 | }; |
| 9218 | $wt = $resolveOne($sides[0], 0); |
| 9219 | $wr = $resolveOne($sides[1], 1); |
| 9220 | $wb = $resolveOne($sides[2], 2); |
| 9221 | $wl = $resolveOne($sides[3], 3); |
| 9222 | $f = 1.0; |
| 9223 | if ($wt + $wb > 0.0) { |
| 9224 | $f = min($f, $areaHeight / ($wt + $wb)); |
| 9225 | } |
| 9226 | if ($wl + $wr > 0.0) { |
| 9227 | $f = min($f, $areaWidth / ($wl + $wr)); |
| 9228 | } |
| 9229 | if ($f < 1.0) { |
| 9230 | $wt *= $f; |
| 9231 | $wr *= $f; |
| 9232 | $wb *= $f; |
| 9233 | $wl *= $f; |
| 9234 | } |
| 9235 | return [$wt, $wr, $wb, $wl]; |
| 9236 | } |
| 9237 | |
| 9238 | /** |
| 9239 | * Resolve `border-image-outset` to the per-side outward extension |
| 9240 | * `[top, right, bottom, left]`. A `<number>` is a multiple of the |
| 9241 | * corresponding computed border-width; `<length>` is absolute. |
| 9242 | * Unset → 0. CSS Backgrounds 3 §6.6. |
| 9243 | * |
| 9244 | * @return array{0: float, 1: float, 2: float, 3: float} |
| 9245 | */ |
| 9246 | private function resolveBorderImageOutset( |
| 9247 | ?\Phpdftk\Css\Value\Value $value, |
| 9248 | float $borderTop, |
| 9249 | float $borderRight, |
| 9250 | float $borderBottom, |
| 9251 | float $borderLeft, |
| 9252 | ): array { |
| 9253 | $borders = [$borderTop, $borderRight, $borderBottom, $borderLeft]; |
| 9254 | $components = []; |
| 9255 | if ($value instanceof \Phpdftk\Css\Value\ValueList |
| 9256 | && $value->separator === \Phpdftk\Css\Value\ListSeparator::Space |
| 9257 | ) { |
| 9258 | $components = $value->values; |
| 9259 | } elseif ($value !== null) { |
| 9260 | $components = [$value]; |
| 9261 | } |
| 9262 | $sides = [ |
| 9263 | $components[0] ?? null, |
| 9264 | $components[1] ?? ($components[0] ?? null), |
| 9265 | $components[2] ?? ($components[0] ?? null), |
| 9266 | $components[3] ?? ($components[1] ?? ($components[0] ?? null)), |
| 9267 | ]; |
| 9268 | $resolveOne = static function (?\Phpdftk\Css\Value\Value $v, int $edge) use ($borders): float { |
| 9269 | if ($v instanceof \Phpdftk\Css\Value\Number || $v instanceof \Phpdftk\Css\Value\Integer) { |
| 9270 | return max(0.0, (float) $v->value) * $borders[$edge]; |
| 9271 | } |
| 9272 | if ($v instanceof \Phpdftk\Css\Value\Length) { |
| 9273 | return max(0.0, $v->value); |
| 9274 | } |
| 9275 | return 0.0; |
| 9276 | }; |
| 9277 | return [ |
| 9278 | $resolveOne($sides[0], 0), |
| 9279 | $resolveOne($sides[1], 1), |
| 9280 | $resolveOne($sides[2], 2), |
| 9281 | $resolveOne($sides[3], 3), |
| 9282 | ]; |
| 9283 | } |
| 9284 | |
| 9285 | /** |
| 9286 | * `border-image-repeat` is one or two keywords: the first applies to the |
| 9287 | * horizontal edges (top / bottom), the second to the vertical edges |
| 9288 | * (left / right); a single value applies to both. Returns |
| 9289 | * `[horizontal, vertical]`. CSS Backgrounds 3 §6.2. |
| 9290 | * |
| 9291 | * @return array{0: string, 1: string} |
| 9292 | */ |
| 9293 | private function parseBorderImageRepeatModes(?\Phpdftk\Css\Value\Value $value): array |
| 9294 | { |
| 9295 | $map = static fn(string $kw): string => match ($kw) { |
| 9296 | 'repeat' => 'repeat', |
| 9297 | 'round' => 'round', |
| 9298 | 'space' => 'space', |
| 9299 | default => 'stretch', |
| 9300 | }; |
| 9301 | $kw = static fn(?\Phpdftk\Css\Value\Value $v): ?string => $v instanceof \Phpdftk\Css\Value\Keyword |
| 9302 | ? $map(strtolower($v->name)) |
| 9303 | : null; |
| 9304 | if ($value instanceof \Phpdftk\Css\Value\ValueList && $value->values !== []) { |
| 9305 | $h = $kw($value->values[0]) ?? 'stretch'; |
| 9306 | $v = $kw($value->values[1] ?? null) ?? $h; |
| 9307 | return [$h, $v]; |
| 9308 | } |
| 9309 | $single = $kw($value) ?? 'stretch'; |
| 9310 | return [$single, $single]; |
| 9311 | } |
| 9312 | |
| 9313 | private function svgRenderer(): \Phpdftk\SvgToPdf\SvgRenderer |
| 9314 | { |
| 9315 | if ($this->svgRenderer === null) { |
| 9316 | assert($this->page !== null && $this->writer !== null); |
| 9317 | $this->svgRenderer = new \Phpdftk\SvgToPdf\SvgRenderer( |
| 9318 | $this->page, |
| 9319 | $this->writer, |
| 9320 | new \Phpdftk\SvgToPdf\Translator( |
| 9321 | documentFontProvider: $this->documentFontBridge(), |
| 9322 | ), |
| 9323 | ); |
| 9324 | } |
| 9325 | return $this->svgRenderer; |
| 9326 | } |
| 9327 | |
| 9328 | /** |
| 9329 | * Build the SVG-side font provider from this page's registered |
| 9330 | * fonts, or null when the document has no font machinery wired |
| 9331 | * (standalone / font-less rendering) - SVG text then keeps the |
| 9332 | * translator's standard-14 fallback. |
| 9333 | */ |
| 9334 | private function documentFontBridge(): ?\Phpdftk\HtmlToPdf\Svg\DocumentFontBridge |
| 9335 | { |
| 9336 | if ($this->fontResolver === null || $this->registeredFonts === []) { |
| 9337 | return null; |
| 9338 | } |
| 9339 | return new \Phpdftk\HtmlToPdf\Svg\DocumentFontBridge( |
| 9340 | $this->fontResolver, |
| 9341 | $this->registeredFonts, |
| 9342 | ); |
| 9343 | } |
| 9344 | |
| 9345 | private function inlineSvgAdapter(): \Phpdftk\HtmlToPdf\Svg\InlineSvgAdapter |
| 9346 | { |
| 9347 | if ($this->inlineSvgAdapter === null) { |
| 9348 | $this->inlineSvgAdapter = new \Phpdftk\HtmlToPdf\Svg\InlineSvgAdapter(); |
| 9349 | } |
| 9350 | return $this->inlineSvgAdapter; |
| 9351 | } |
| 9352 | |
| 9353 | private function inlineMathmlAdapter(): \Phpdftk\HtmlToPdf\Mathml\InlineMathmlAdapter |
| 9354 | { |
| 9355 | if ($this->inlineMathmlAdapter === null) { |
| 9356 | $this->inlineMathmlAdapter = new \Phpdftk\HtmlToPdf\Mathml\InlineMathmlAdapter(); |
| 9357 | } |
| 9358 | return $this->inlineMathmlAdapter; |
| 9359 | } |
| 9360 | |
| 9361 | private function mathmlRenderer(): \Phpdftk\MathmlToPdf\MathmlRenderer |
| 9362 | { |
| 9363 | if ($this->mathmlRenderer === null) { |
| 9364 | assert($this->page !== null && $this->writer !== null); |
| 9365 | $this->mathmlRenderer = new \Phpdftk\MathmlToPdf\MathmlRenderer($this->page, $this->writer); |
| 9366 | } |
| 9367 | return $this->mathmlRenderer; |
| 9368 | } |
| 9369 | |
| 9370 | /** |
| 9371 | * Resolve the math-font {@see OpenTypeData} for `$box` by |
| 9372 | * reading the cascaded `font-family` and looking it up in |
| 9373 | * `$fontDataByFamily`. Returns null when no family matches, |
| 9374 | * the matching font has no MATH table, or the cascade hasn't |
| 9375 | * resolved a usable family name. |
| 9376 | * |
| 9377 | * Used by paintInlineMath to thread the cascade-loaded font |
| 9378 | * (typically via `@font-face`) into the MathmlRenderer so its |
| 9379 | * MATH-table constants (FractionRuleThickness, axis height, |
| 9380 | * etc.) drive layout. Without this hook MathmlRenderer falls |
| 9381 | * back to its tracer-bullet defaults regardless of what |
| 9382 | * `font-family` the cascade resolved. |
| 9383 | */ |
| 9384 | private function mathFontDataFor( |
| 9385 | Box $box, |
| 9386 | ): ?\Phpdftk\FontParser\FontFaceData { |
| 9387 | if ($this->fontDataByFamily === []) { |
| 9388 | return null; |
| 9389 | } |
| 9390 | $family = $box->style->get('font-family'); |
| 9391 | $names = []; |
| 9392 | if ($family instanceof \Phpdftk\Css\Value\StringValue) { |
| 9393 | $names[] = $family->value; |
| 9394 | } elseif ($family instanceof \Phpdftk\Css\Value\Keyword) { |
| 9395 | $names[] = $family->name; |
| 9396 | } elseif ($family instanceof \Phpdftk\Css\Value\ValueList) { |
| 9397 | foreach ($family->values as $entry) { |
| 9398 | if ($entry instanceof \Phpdftk\Css\Value\StringValue) { |
| 9399 | $names[] = $entry->value; |
| 9400 | } elseif ($entry instanceof \Phpdftk\Css\Value\Keyword) { |
| 9401 | $names[] = $entry->name; |
| 9402 | } |
| 9403 | } |
| 9404 | } |
| 9405 | foreach ($names as $name) { |
| 9406 | $key = strtolower(trim($name)); |
| 9407 | $data = $this->fontDataByFamily[$key] ?? null; |
| 9408 | if ($data !== null |
| 9409 | && $data->mathTable !== null |
| 9410 | && $data->mathTable->hasMathConstants() |
| 9411 | ) { |
| 9412 | return $data; |
| 9413 | } |
| 9414 | } |
| 9415 | return null; |
| 9416 | } |
| 9417 | |
| 9418 | /** |
| 9419 | * Build a fresh {@see MathmlRenderer} for `$box` with its |
| 9420 | * math-font data threaded in. Falls back to the cached default |
| 9421 | * renderer when no MATH-table font matches the cascade - |
| 9422 | * keeps the common "no math font" path zero-cost. |
| 9423 | * |
| 9424 | * Wired into the paint path: without it every document laid its |
| 9425 | * maths out on the tracer-bullet constants no matter what font the |
| 9426 | * author specified, because the cached default renderer carries no |
| 9427 | * font at all. |
| 9428 | */ |
| 9429 | private function mathmlRendererFor( |
| 9430 | Box $box, |
| 9431 | ): \Phpdftk\MathmlToPdf\MathmlRenderer { |
| 9432 | $fontData = $this->mathFontDataFor($box); |
| 9433 | // The MathML renderer needs CFF outlines for its math-table- |
| 9434 | // driven glyph variants. TrueType math fonts exist (`STIXTwoMath` |
| 9435 | // ships both), but the math path is wired through the OT-CFF |
| 9436 | // subset/embed flow today. Drop back to the cached default |
| 9437 | // renderer for non-CFF data — the math layout still runs, just |
| 9438 | // without the size-variant / assembly-part substitution layer. |
| 9439 | if (!$fontData instanceof \Phpdftk\FontParser\OpenTypeData) { |
| 9440 | return $this->mathmlRenderer(); |
| 9441 | } |
| 9442 | assert($this->page !== null && $this->writer !== null); |
| 9443 | return new \Phpdftk\MathmlToPdf\MathmlRenderer( |
| 9444 | $this->page, |
| 9445 | $this->writer, |
| 9446 | mathFontData: $fontData, |
| 9447 | ); |
| 9448 | } |
| 9449 | |
| 9450 | /** |
| 9451 | * Paint an inline `<math>` HTML element by adapting its subtree |
| 9452 | * into a typed MathmlDocument and handing the result to the |
| 9453 | * MathmlRenderer. |
| 9454 | * |
| 9455 | * Sizing precedence mirrors the inline-SVG painter (CSS Display |
| 9456 | * §3.5): |
| 9457 | * |
| 9458 | * 1. Box geometry from the CSS-cascaded `width` / `height` — |
| 9459 | * only populated when InlineLayout actually laid the box |
| 9460 | * out (see #39). |
| 9461 | * 2. Cascade values read directly (covers the no-font case |
| 9462 | * where InlineLayout returns early). |
| 9463 | * |
| 9464 | * MathML doesn't have a viewBox or intrinsic-attribute shortcut |
| 9465 | * the way SVG does — when nothing in the cascade declares a |
| 9466 | * size, math content has an intrinsic size derived from its |
| 9467 | * glyph metrics. For the tracer-bullet renderer we default to |
| 9468 | * a one-line strip the same height as the renderer's default |
| 9469 | * font (12 pt × 1 line ≈ 14 pt) and an arbitrary width band |
| 9470 | * (200 pt) so a sized-from-glyphs <math> still produces output. |
| 9471 | * Real intrinsic sizing lands once MathmlRenderer learns to |
| 9472 | * measure its own glyphs (separate follow-up). |
| 9473 | * |
| 9474 | * A parse failure here is swallowed and the MathML silently |
| 9475 | * skipped — one malformed inline expression shouldn't poison |
| 9476 | * the whole page render. |
| 9477 | */ |
| 9478 | private function paintInlineMath( |
| 9479 | \Phpdftk\Html\Dom\Element $element, |
| 9480 | Box $box, |
| 9481 | ContentStream $stream, |
| 9482 | ): void { |
| 9483 | $geo = $box->geometry; |
| 9484 | $width = $geo->width; |
| 9485 | $height = $geo->height; |
| 9486 | // Layer 2: read directly from the cascade when layout left |
| 9487 | // geometry zero. Same fix the SVG painter applies for the |
| 9488 | // no-font case (#39). |
| 9489 | if ($width <= 0.0) { |
| 9490 | $cascaded = $box->style->get('width'); |
| 9491 | if ($cascaded instanceof \Phpdftk\Css\Value\Length && $cascaded->value > 0.0) { |
| 9492 | $width = $cascaded->value; |
| 9493 | } |
| 9494 | } |
| 9495 | if ($height <= 0.0) { |
| 9496 | $cascaded = $box->style->get('height'); |
| 9497 | if ($cascaded instanceof \Phpdftk\Css\Value\Length && $cascaded->value > 0.0) { |
| 9498 | $height = $cascaded->value; |
| 9499 | } |
| 9500 | } |
| 9501 | // Parse the inline MathML before deriving any intrinsic |
| 9502 | // size so we can ask MathmlRenderer for its natural |
| 9503 | // dimensions when the cascade left both axes zero. Layer |
| 9504 | // 3 (intrinsic) sits between the cascade-explicit values |
| 9505 | // and the typographic fallback. |
| 9506 | try { |
| 9507 | $mathDoc = $this->inlineMathmlAdapter()->adapt($element); |
| 9508 | } catch (\Throwable) { |
| 9509 | return; |
| 9510 | } |
| 9511 | // Resolve the CSS-cascaded font size for the <math> element |
| 9512 | // so em-relative children (mpadded height="3em", mspace |
| 9513 | // depth="2em", ...) measure against the right base. WPT |
| 9514 | // fixtures expect CSS default of 16px (== 16pt under |
| 9515 | // html-to-pdf's 1px = 1pt cascade); the painter falls back |
| 9516 | // to MathmlRenderer::DEFAULT_FONT_SIZE when nothing is set. |
| 9517 | $fontSize = $this->dominantFontSize($box); |
| 9518 | if ($width <= 0.0 || $height <= 0.0) { |
| 9519 | [$intrinsicW, $intrinsicH] = $this->mathmlRenderer() |
| 9520 | ->intrinsicSize($mathDoc, $fontSize); |
| 9521 | if ($width <= 0.0 && $intrinsicW > 0.0) { |
| 9522 | $width = $intrinsicW; |
| 9523 | } |
| 9524 | if ($height <= 0.0 && $intrinsicH > 0.0) { |
| 9525 | $height = $intrinsicH; |
| 9526 | } |
| 9527 | } |
| 9528 | // Final fallback: a typographically sensible default sized |
| 9529 | // strip. 14 pt tall is one line of 12 pt math + a sliver |
| 9530 | // of leading; 200 pt wide is wider than any common single- |
| 9531 | // expression token sequence but the renderer just stops |
| 9532 | // emitting glyphs when content runs out. |
| 9533 | if ($height <= 0.0) { |
| 9534 | $height = 14.0; |
| 9535 | } |
| 9536 | if ($width <= 0.0) { |
| 9537 | $width = 200.0; |
| 9538 | } |
| 9539 | // CSS position: absolute / fixed on inline foreign content |
| 9540 | // is not currently honoured by InlineLayout (which always |
| 9541 | // places these along the line box). For the WPT MathML |
| 9542 | // fixtures that use `<math style="position: absolute; |
| 9543 | // top: 0; left: 0;">` to anchor the math to the page edge, |
| 9544 | // override geo->x / geo->y with the cascaded left / top |
| 9545 | // when present. Treats left / top as absolute page |
| 9546 | // coordinates - good enough when the math sits inside a |
| 9547 | // top-level positioned div (the common WPT pattern); a |
| 9548 | // proper containing-block calculation lives behind a |
| 9549 | // bigger layout fix. |
| 9550 | [$layoutX, $layoutY] = $this->resolveInlineAbsoluteOrigin( |
| 9551 | $box, |
| 9552 | $geo->x, |
| 9553 | $geo->y, |
| 9554 | ); |
| 9555 | $pdfY = $this->pageHeight - $layoutY - $height; |
| 9556 | // Hand the cascade-resolved MATH font to the renderer so the |
| 9557 | // font's own MathConstants drive layout. Falls back to the |
| 9558 | // cached default renderer when the resolved family has no |
| 9559 | // MATH table, which keeps the no-math-font path unchanged. |
| 9560 | $renderer = $this->mathmlRendererFor($box); |
| 9561 | $ascentPt = $renderer->intrinsicAscent($mathDoc, $fontSize); |
| 9562 | $renderer->draw( |
| 9563 | $mathDoc, |
| 9564 | $layoutX, |
| 9565 | $pdfY, |
| 9566 | $width, |
| 9567 | $height, |
| 9568 | stream: $stream, |
| 9569 | fontSize: $fontSize, |
| 9570 | ascentPt: $ascentPt, |
| 9571 | ); |
| 9572 | } |
| 9573 | |
| 9574 | /** |
| 9575 | * Resolve the layout-space origin for an inline foreign |
| 9576 | * element when CSS `position` is `absolute` / `fixed`. |
| 9577 | * Returns `[x, y]` in layout (top-down) coordinates. |
| 9578 | * |
| 9579 | * Falls back to the box's layout-derived geometry when the |
| 9580 | * position keyword isn't a positioned form. When it IS |
| 9581 | * positioned, reads cascaded `left` / `top` Length values and |
| 9582 | * treats them as absolute page coordinates - sufficient for |
| 9583 | * the common case where the foreign content is inside the |
| 9584 | * initial containing block (or close enough that the |
| 9585 | * containing-block resolution from BlockLayout has already |
| 9586 | * shifted ancestors into position). |
| 9587 | * |
| 9588 | * @return array{0: float, 1: float} |
| 9589 | */ |
| 9590 | private function resolveInlineAbsoluteOrigin( |
| 9591 | Box $box, |
| 9592 | float $defaultX, |
| 9593 | float $defaultY, |
| 9594 | ): array { |
| 9595 | $position = $box->style->get('position'); |
| 9596 | if (!($position instanceof \Phpdftk\Css\Value\Keyword)) { |
| 9597 | return [$defaultX, $defaultY]; |
| 9598 | } |
| 9599 | $keyword = strtolower($position->name); |
| 9600 | if ($keyword !== 'absolute' && $keyword !== 'fixed') { |
| 9601 | return [$defaultX, $defaultY]; |
| 9602 | } |
| 9603 | $left = $box->style->get('left'); |
| 9604 | $top = $box->style->get('top'); |
| 9605 | $x = $left instanceof \Phpdftk\Css\Value\Length |
| 9606 | ? $left->value |
| 9607 | : $defaultX; |
| 9608 | $y = $top instanceof \Phpdftk\Css\Value\Length |
| 9609 | ? $top->value |
| 9610 | : $defaultY; |
| 9611 | return [$x, $y]; |
| 9612 | } |
| 9613 | |
| 9614 | /** |
| 9615 | * Paint an inline `<svg>` HTML element by adapting its subtree |
| 9616 | * into a typed SvgDocument and handing the result to the existing |
| 9617 | * SvgRenderer. |
| 9618 | * |
| 9619 | * Dimensions: prefer the box's resolved geometry (CSS-cascaded |
| 9620 | * `width` / `height` win over intrinsic). If geometry is zero |
| 9621 | * because the cascade left dimensions unresolved, fall back to |
| 9622 | * the `<svg width="…" height="…">` attributes (treated as CSS |
| 9623 | * pixels) — same precedence the inline-SVG sizing algorithm uses |
| 9624 | * in CSS Display §3.5. |
| 9625 | * |
| 9626 | * A parse failure here is swallowed and the SVG silently skipped |
| 9627 | * — one malformed inline-SVG shouldn't poison the whole page |
| 9628 | * render. The pdf consumer sees an empty box where the SVG would |
| 9629 | * have been; the rest of the document is unaffected. |
| 9630 | */ |
| 9631 | /** |
| 9632 | * Paint an `<img src="*.svg">` (or `data:image/svg+xml`) |
| 9633 | * replaced-element by loading the external SVG and rendering it |
| 9634 | * into the box's CSS-laid-out geometry. |
| 9635 | * |
| 9636 | * Unlike `paintInlineSvg`, the SVG document here is an external |
| 9637 | * resource: the box's geometry is already resolved by the layout |
| 9638 | * engine from the cascade plus the intrinsic dimensions reported |
| 9639 | * by `SvgParser`. We just clip to the box rect, apply |
| 9640 | * `object-fit` / `object-position`, and delegate to the SvgRenderer. |
| 9641 | */ |
| 9642 | private function paintImgSvg( |
| 9643 | \Phpdftk\Html\Dom\Element $element, |
| 9644 | Box $box, |
| 9645 | ContentStream $stream, |
| 9646 | string $src, |
| 9647 | ): void { |
| 9648 | if ($this->writer === null || $this->page === null) { |
| 9649 | return; |
| 9650 | } |
| 9651 | $geo = $box->geometry; |
| 9652 | if ($geo->width <= 0.0) { |
| 9653 | return; |
| 9654 | } |
| 9655 | $svgDoc = $this->loadSvgDocument($src); |
| 9656 | if ($svgDoc === null) { |
| 9657 | return; |
| 9658 | } |
| 9659 | $height = $geo->height > 0.0 ? $geo->height : $geo->width; |
| 9660 | // CSS Images 3 §5.3 — `object-fit` decides the painted SVG's |
| 9661 | // scale within the box; `object-position` decides where the |
| 9662 | // slack sits. Defaults: `fill` + centre. |
| 9663 | $fit = $this->objectFitKeyword($box); |
| 9664 | $rect = $this->resolveObjectFit($fit, $src, $geo->width, $height); |
| 9665 | $positionValue = $box->style->get('object-position'); |
| 9666 | if ($positionValue !== null |
| 9667 | && ($rect['w'] !== $geo->width || $rect['h'] !== $height) |
| 9668 | ) { |
| 9669 | $pos = $this->resolveBackgroundPosition( |
| 9670 | $positionValue, |
| 9671 | $rect['w'], |
| 9672 | $rect['h'], |
| 9673 | $geo->width, |
| 9674 | $height, |
| 9675 | ); |
| 9676 | $rect['offsetX'] = $pos['offsetX']; |
| 9677 | $rect['offsetY'] = $pos['offsetY']; |
| 9678 | } |
| 9679 | $pdfY = $this->pageHeight - $geo->y - $height; |
| 9680 | $stream->saveGraphicsState(); |
| 9681 | // Clip to the box rect so `cover` overflow doesn't bleed into |
| 9682 | // sibling boxes — same posture as `paintImage` for raster. |
| 9683 | $stream->rectangle($geo->x, $pdfY, $geo->width, $height); |
| 9684 | $stream->clip(); |
| 9685 | $stream->endPath(); |
| 9686 | try { |
| 9687 | $this->svgRenderer()->draw( |
| 9688 | $svgDoc, |
| 9689 | $geo->x + $rect['offsetX'], |
| 9690 | $pdfY + ($height - $rect['h'] - $rect['offsetY']), |
| 9691 | $rect['w'], |
| 9692 | $rect['h'], |
| 9693 | stream: $stream, |
| 9694 | ); |
| 9695 | } catch (\Throwable) { |
| 9696 | // Swallow paint failures so one malformed SVG doesn't kill |
| 9697 | // the document render. Mirrors the raster path's catch. |
| 9698 | } |
| 9699 | $stream->restoreGraphicsState(); |
| 9700 | } |
| 9701 | |
| 9702 | private function paintInlineSvg( |
| 9703 | \Phpdftk\Html\Dom\Element $element, |
| 9704 | Box $box, |
| 9705 | ContentStream $stream, |
| 9706 | ): void { |
| 9707 | $geo = $box->geometry; |
| 9708 | $width = $geo->width; |
| 9709 | $height = $geo->height; |
| 9710 | // Sizing precedence for the inline SVG: |
| 9711 | // 1. Box geometry from CSS-cascaded width/height — only |
| 9712 | // populated when InlineLayout actually laid the box out. |
| 9713 | // 2. Cascade values read directly (covers the no-font case |
| 9714 | // where InlineLayout returns early before tokenisation, |
| 9715 | // but the cascade still has Length values from author CSS). |
| 9716 | // 3. The svg element's own `width` / `height` attributes, |
| 9717 | // parsed as CSS pixels. |
| 9718 | // Without precedence #2 a document with `#s { width: 50pt }` |
| 9719 | // and no embedded font would render the SVG at zero size. |
| 9720 | // Precedence #3 catches the bare `<svg width="80" height="60">` |
| 9721 | // case where neither CSS nor the cascade has a Length. |
| 9722 | if ($width <= 0.0) { |
| 9723 | $cascaded = $box->style->get('width'); |
| 9724 | if ($cascaded instanceof \Phpdftk\Css\Value\Length && $cascaded->value > 0.0) { |
| 9725 | $width = $cascaded->value; |
| 9726 | } |
| 9727 | } |
| 9728 | if ($height <= 0.0) { |
| 9729 | $cascaded = $box->style->get('height'); |
| 9730 | if ($cascaded instanceof \Phpdftk\Css\Value\Length && $cascaded->value > 0.0) { |
| 9731 | $height = $cascaded->value; |
| 9732 | } |
| 9733 | } |
| 9734 | if ($width <= 0.0) { |
| 9735 | $attr = $element->getAttribute('width'); |
| 9736 | if ($attr !== null) { |
| 9737 | $width = $this->parseSvgLength($attr); |
| 9738 | } |
| 9739 | } |
| 9740 | if ($height <= 0.0) { |
| 9741 | $attr = $element->getAttribute('height'); |
| 9742 | if ($attr !== null) { |
| 9743 | $height = $this->parseSvgLength($attr); |
| 9744 | } |
| 9745 | } |
| 9746 | // Final fallback: intrinsic dimensions from the viewBox's |
| 9747 | // width/height columns. SVG 2 §8.2 — when neither CSS nor a |
| 9748 | // width/height attr declares a size, the viewBox supplies the |
| 9749 | // intrinsic aspect ratio AND, in browsers, an intrinsic |
| 9750 | // pixel size for replaced-element layout (third + fourth |
| 9751 | // viewBox values treated as CSS pixels). The viewBox parser |
| 9752 | // lives in `ViewportElement::viewBox()` but we duplicate the |
| 9753 | // tiny extraction here to avoid forcing the SVG parser to |
| 9754 | // run on a zero-size SVG we'd otherwise have dropped. |
| 9755 | if ($width <= 0.0 || $height <= 0.0) { |
| 9756 | $vb = $this->parseViewBox($element->getAttribute('viewBox')); |
| 9757 | if ($vb !== null) { |
| 9758 | if ($width <= 0.0) { |
| 9759 | $width = $vb[0] * 0.75; |
| 9760 | } |
| 9761 | if ($height <= 0.0) { |
| 9762 | $height = $vb[1] * 0.75; |
| 9763 | } |
| 9764 | } |
| 9765 | } |
| 9766 | if ($width <= 0.0 || $height <= 0.0) { |
| 9767 | return; |
| 9768 | } |
| 9769 | try { |
| 9770 | $svgDoc = $this->inlineSvgAdapter()->adapt($element); |
| 9771 | } catch (\Throwable) { |
| 9772 | return; |
| 9773 | } |
| 9774 | // PDF y-axis runs bottom-up; the box geometry's `y` is the |
| 9775 | // top edge in CSS coords, so we flip relative to pageHeight. |
| 9776 | $pdfY = $this->pageHeight - $geo->y - $height; |
| 9777 | // SVG 2 §8.2 / CSS Overflow 3 §3.3 — the SVG viewport clips its |
| 9778 | // content by default (UA `svg { overflow: clip }`). SvgRenderer's |
| 9779 | // own draw() only clips for slice/preserveAspectRatio, so the |
| 9780 | // caller must confine content larger than the viewport (a 150×150 |
| 9781 | // rect in a 100×100 svg). Honour per-axis overflow, contain:paint, |
| 9782 | // and overflow-clip-margin via the shared overflow-clip machinery. |
| 9783 | $needsClip = $this->shouldOverflowClip($box); |
| 9784 | if ($needsClip) { |
| 9785 | $stream->saveGraphicsState(); |
| 9786 | $this->emitOverflowClipPath($stream, $box); |
| 9787 | } |
| 9788 | $this->svgRenderer()->draw( |
| 9789 | $svgDoc, |
| 9790 | $geo->x, |
| 9791 | $pdfY, |
| 9792 | $width, |
| 9793 | $height, |
| 9794 | stream: $stream, |
| 9795 | ); |
| 9796 | if ($needsClip) { |
| 9797 | $stream->restoreGraphicsState(); |
| 9798 | } |
| 9799 | } |
| 9800 | |
| 9801 | /** |
| 9802 | * Pull the width/height columns out of an SVG `viewBox` attribute |
| 9803 | * for the intrinsic-sizing fallback. Returns `[width, height]` in |
| 9804 | * CSS pixels (viewBox values are unitless user-space coordinates, |
| 9805 | * which in the absence of any other sizing input are interpreted |
| 9806 | * as CSS pixels per SVG 2 §8.2). Returns null on parse failure. |
| 9807 | * |
| 9808 | * @return array{0: float, 1: float}|null |
| 9809 | */ |
| 9810 | private function parseViewBox(?string $raw): ?array |
| 9811 | { |
| 9812 | if ($raw === null) { |
| 9813 | return null; |
| 9814 | } |
| 9815 | $parts = preg_split('/[\s,]+/', trim($raw)) ?: []; |
| 9816 | if (count($parts) !== 4) { |
| 9817 | return null; |
| 9818 | } |
| 9819 | foreach ($parts as $p) { |
| 9820 | if (!is_numeric($p)) { |
| 9821 | return null; |
| 9822 | } |
| 9823 | } |
| 9824 | $w = (float) $parts[2]; |
| 9825 | $h = (float) $parts[3]; |
| 9826 | if ($w <= 0.0 || $h <= 0.0) { |
| 9827 | return null; |
| 9828 | } |
| 9829 | return [$w, $h]; |
| 9830 | } |
| 9831 | |
| 9832 | /** |
| 9833 | * Tiny SVG-length parser used by the inline-SVG fallback path. |
| 9834 | * Strips an optional `px` / `pt` suffix and clamps to a non- |
| 9835 | * negative float. We accept only `px` and `pt` for now — any |
| 9836 | * other unit (cm, em, %) returns 0 and lets the dimension lookup |
| 9837 | * fall through to "skip". |
| 9838 | */ |
| 9839 | private function parseSvgLength(string $value): float |
| 9840 | { |
| 9841 | $trimmed = trim($value); |
| 9842 | if ($trimmed === '') { |
| 9843 | return 0.0; |
| 9844 | } |
| 9845 | if (preg_match('/^([\d.]+)\s*(px|pt)?$/i', $trimmed, $m) !== 1) { |
| 9846 | return 0.0; |
| 9847 | } |
| 9848 | $n = (float) $m[1]; |
| 9849 | if ($n <= 0.0) { |
| 9850 | return 0.0; |
| 9851 | } |
| 9852 | // `pt` arrives as PDF points already; `px` and the bare form |
| 9853 | // are CSS pixels at 96 dpi, which is 0.75 pt per px. |
| 9854 | $unit = isset($m[2]) ? strtolower($m[2]) : 'px'; |
| 9855 | return $unit === 'pt' ? $n : $n * 0.75; |
| 9856 | } |
| 9857 | |
| 9858 | private function paintBorders(Box $box, ContentStream $stream): void |
| 9859 | { |
| 9860 | // CSS Backgrounds 3 §6 — when `border-image-source` is set and |
| 9861 | // successfully loaded, it REPLACES the per-side border paint. |
| 9862 | // We delegate to the 9-slice painter and skip the legacy |
| 9863 | // border-colour/style rendering for this box. |
| 9864 | if ($this->paintBorderImage($box, $stream)) { |
| 9865 | return; |
| 9866 | } |
| 9867 | $geo = $box->geometry; |
| 9868 | $outerX = $geo->x - $geo->paddingLeft - $geo->borderLeft; |
| 9869 | $outerY = $geo->y - $geo->paddingTop - $geo->borderTop; |
| 9870 | $outerWidth = $geo->paddingLeft + $geo->width + $geo->paddingRight |
| 9871 | + $geo->borderLeft + $geo->borderRight; |
| 9872 | $outerHeight = $geo->paddingTop + $geo->height + $geo->paddingBottom |
| 9873 | + $geo->borderTop + $geo->borderBottom; |
| 9874 | |
| 9875 | // Rounded-uniform-border fast path: all four sides share width + |
| 9876 | // colour + style, and any radius is set → emit one stroked |
| 9877 | // rounded path. Mixed-width/colour borders or no radius fall back |
| 9878 | // to the per-side rectangle path (still straight corners). |
| 9879 | $radii = $this->borderRadii($box); |
| 9880 | if (array_sum($radii) > 0.0 && $this->bordersAreUniform($box)) { |
| 9881 | $width = $geo->borderTop; |
| 9882 | if ($width > 0.0) { |
| 9883 | $this->emitRoundedStroke( |
| 9884 | $stream, |
| 9885 | $outerX + $width / 2, |
| 9886 | $outerY + $width / 2, |
| 9887 | $outerWidth - $width, |
| 9888 | $outerHeight - $width, |
| 9889 | $radii, |
| 9890 | $this->borderColor($box, 'top'), |
| 9891 | $width, |
| 9892 | ); |
| 9893 | return; |
| 9894 | } |
| 9895 | } |
| 9896 | |
| 9897 | if ($geo->borderTop > 0.0 && $this->borderIsVisible($box, 'top')) { |
| 9898 | $this->paintBorderSide( |
| 9899 | $stream, |
| 9900 | $this->borderStyleName($box, 'top'), |
| 9901 | $this->borderColor($box, 'top'), |
| 9902 | $outerX, |
| 9903 | $outerY, |
| 9904 | $outerWidth, |
| 9905 | $geo->borderTop, |
| 9906 | side: 'top', |
| 9907 | ); |
| 9908 | } |
| 9909 | if ($geo->borderBottom > 0.0 && $this->borderIsVisible($box, 'bottom')) { |
| 9910 | $this->paintBorderSide( |
| 9911 | $stream, |
| 9912 | $this->borderStyleName($box, 'bottom'), |
| 9913 | $this->borderColor($box, 'bottom'), |
| 9914 | $outerX, |
| 9915 | $outerY + $outerHeight - $geo->borderBottom, |
| 9916 | $outerWidth, |
| 9917 | $geo->borderBottom, |
| 9918 | side: 'bottom', |
| 9919 | ); |
| 9920 | } |
| 9921 | if ($geo->borderLeft > 0.0 && $this->borderIsVisible($box, 'left')) { |
| 9922 | $this->paintBorderSide( |
| 9923 | $stream, |
| 9924 | $this->borderStyleName($box, 'left'), |
| 9925 | $this->borderColor($box, 'left'), |
| 9926 | $outerX, |
| 9927 | $outerY, |
| 9928 | $geo->borderLeft, |
| 9929 | $outerHeight, |
| 9930 | side: 'left', |
| 9931 | ); |
| 9932 | } |
| 9933 | if ($geo->borderRight > 0.0 && $this->borderIsVisible($box, 'right')) { |
| 9934 | $this->paintBorderSide( |
| 9935 | $stream, |
| 9936 | $this->borderStyleName($box, 'right'), |
| 9937 | $this->borderColor($box, 'right'), |
| 9938 | $outerX + $outerWidth - $geo->borderRight, |
| 9939 | $outerY, |
| 9940 | $geo->borderRight, |
| 9941 | $outerHeight, |
| 9942 | side: 'right', |
| 9943 | ); |
| 9944 | } |
| 9945 | } |
| 9946 | |
| 9947 | /** |
| 9948 | * Paint one border side honouring `border-style`. `axis` flags |
| 9949 | * whether the rect runs horizontally (top / bottom) or vertically |
| 9950 | * (left / right) so the `double` decomposition knows which |
| 9951 | * dimension to split into thirds. |
| 9952 | * |
| 9953 | * - `solid`: one filled rect (the original behaviour). |
| 9954 | * - `double` (CSS Backgrounds 3 §5): two parallel bands each |
| 9955 | * `thickness/3` thick with a `thickness/3` gap. When the |
| 9956 | * thickness is too small to split (< 3 units), falls back to |
| 9957 | * solid so the border doesn't disappear into a hairline. |
| 9958 | * - `dashed` / `dotted`: stroke a line at the centerline of the |
| 9959 | * side with a PDF dash pattern. Dashed uses 3w-on / 2w-off; |
| 9960 | * dotted uses 1w-on / 1w-off (PDF rounds dotted patterns to |
| 9961 | * square caps). |
| 9962 | * - Other style keywords (`groove`, `ridge`, `inset`, `outset`): |
| 9963 | * Phase-1 fallback to solid. |
| 9964 | */ |
| 9965 | private function paintBorderSide( |
| 9966 | ContentStream $stream, |
| 9967 | string $styleName, |
| 9968 | Color $color, |
| 9969 | float $x, |
| 9970 | float $y, |
| 9971 | float $width, |
| 9972 | float $height, |
| 9973 | string $side, |
| 9974 | ): void { |
| 9975 | $axis = ($side === 'top' || $side === 'bottom') ? 'horizontal' : 'vertical'; |
| 9976 | // CSS Backgrounds 3 §5.2 — 3D-effect styles. `inset` darkens |
| 9977 | // top + left; `outset` lightens them; `groove` and `ridge` |
| 9978 | // split per side as if etched / raised. |
| 9979 | if (in_array($styleName, ['inset', 'outset', 'groove', 'ridge'], true)) { |
| 9980 | $color = $this->resolve3dBorderColor($styleName, $color, $side); |
| 9981 | } |
| 9982 | if ($styleName === 'dashed' || $styleName === 'dotted') { |
| 9983 | $thickness = $axis === 'horizontal' ? $height : $width; |
| 9984 | $this->paintDashedDottedSide( |
| 9985 | $stream, |
| 9986 | $styleName, |
| 9987 | $color, |
| 9988 | $x, |
| 9989 | $y, |
| 9990 | $width, |
| 9991 | $height, |
| 9992 | $axis, |
| 9993 | $thickness, |
| 9994 | ); |
| 9995 | return; |
| 9996 | } |
| 9997 | if ($styleName === 'double') { |
| 9998 | $thickness = $axis === 'horizontal' ? $height : $width; |
| 9999 | if ($thickness >= 3.0) { |
| 10000 | $third = $thickness / 3.0; |
| 10001 | if ($axis === 'horizontal') { |
| 10002 | // Two horizontal bands stacked vertically. |
| 10003 | $this->emitRect($stream, $x, $y, $width, $third, fill: $color); |
| 10004 | $this->emitRect($stream, $x, $y + 2 * $third, $width, $third, fill: $color); |
| 10005 | } else { |
| 10006 | // Two vertical bands stacked horizontally. |
| 10007 | $this->emitRect($stream, $x, $y, $third, $height, fill: $color); |
| 10008 | $this->emitRect($stream, $x + 2 * $third, $y, $third, $height, fill: $color); |
| 10009 | } |
| 10010 | return; |
| 10011 | } |
| 10012 | } |
| 10013 | $this->emitRect($stream, $x, $y, $width, $height, fill: $color); |
| 10014 | } |
| 10015 | |
| 10016 | /** |
| 10017 | * Stroke one side of a border as a dashed / dotted line at the |
| 10018 | * centerline of the side, at line-width = thickness. CSS |
| 10019 | * Backgrounds 3 §5 says the dash / dot geometry is |
| 10020 | * implementation-defined; we follow the Chromium + WebKit |
| 10021 | * convention: |
| 10022 | * - dashed: dash-length = 2w, gap = w (period 3w, butt cap). |
| 10023 | * - dotted: round-capped point-dashes spaced 2w apart, so each |
| 10024 | * "dot" renders as a circle of diameter = thickness. The |
| 10025 | * stroke is inset by half the thickness on each end so the |
| 10026 | * leading dot sits at the centre-line crossing of the two |
| 10027 | * meeting borders (matching the corner geometry browsers |
| 10028 | * emit). |
| 10029 | * The period for both styles is rounded to fit the edge in whole |
| 10030 | * cycles so dashes / dots stay symmetric across the corner; this |
| 10031 | * is what closes the residual ~14% pixel-AE vs Chromium on the |
| 10032 | * dashed / dotted fixtures (issue #27). |
| 10033 | */ |
| 10034 | private function paintDashedDottedSide( |
| 10035 | ContentStream $stream, |
| 10036 | string $styleName, |
| 10037 | Color $color, |
| 10038 | float $x, |
| 10039 | float $y, |
| 10040 | float $width, |
| 10041 | float $height, |
| 10042 | string $axis, |
| 10043 | float $thickness, |
| 10044 | ): void { |
| 10045 | if ($thickness <= 0.0) { |
| 10046 | return; |
| 10047 | } |
| 10048 | $edgeLength = $axis === 'horizontal' ? $width : $height; |
| 10049 | if ($edgeLength <= 0.0) { |
| 10050 | return; |
| 10051 | } |
| 10052 | $stream->saveGraphicsState(); |
| 10053 | $stream->setStrokeColorRGB($color->r, $color->g, $color->b); |
| 10054 | $stream->setLineWidth($thickness); |
| 10055 | |
| 10056 | if ($styleName === 'dotted') { |
| 10057 | // Round-capped point-dash → each "on" of length 0 paints a |
| 10058 | // full-thickness circle. Inset by thickness/2 so the first |
| 10059 | // and last dot land on the corner of the two borders' |
| 10060 | // centre-lines. |
| 10061 | $insetEdge = max($edgeLength - $thickness, 0.0); |
| 10062 | $targetPeriod = $thickness * 2.0; |
| 10063 | $count = max(1, (int) round($insetEdge / $targetPeriod)); |
| 10064 | $period = $count > 0 ? $insetEdge / $count : $targetPeriod; |
| 10065 | $stream->setLineCap(1); |
| 10066 | $stream->setDashPattern([0.0, $period], 0); |
| 10067 | [$startX, $startY, $endX, $endY] = $this->dashedSideEndpoints( |
| 10068 | $axis, |
| 10069 | $x, |
| 10070 | $y, |
| 10071 | $width, |
| 10072 | $height, |
| 10073 | $thickness / 2.0, |
| 10074 | ); |
| 10075 | } else { |
| 10076 | // Dashed — dash:gap = 2:1, period rounded to whole cycles. |
| 10077 | $targetPeriod = $thickness * 3.0; |
| 10078 | $count = max(1, (int) round($edgeLength / $targetPeriod)); |
| 10079 | $period = $edgeLength / $count; |
| 10080 | $dash = $period * 2.0 / 3.0; |
| 10081 | $gap = $period - $dash; |
| 10082 | $stream->setDashPattern([$dash, $gap], 0); |
| 10083 | [$startX, $startY, $endX, $endY] = $this->dashedSideEndpoints( |
| 10084 | $axis, |
| 10085 | $x, |
| 10086 | $y, |
| 10087 | $width, |
| 10088 | $height, |
| 10089 | 0.0, |
| 10090 | ); |
| 10091 | } |
| 10092 | $stream->moveTo($startX, $startY); |
| 10093 | $stream->lineTo($endX, $endY); |
| 10094 | $stream->stroke(); |
| 10095 | $stream->restoreGraphicsState(); |
| 10096 | } |
| 10097 | |
| 10098 | /** |
| 10099 | * Compute the PDF-space stroke endpoints for one dashed / dotted |
| 10100 | * border side, optionally inset by `$inset` units along the axis |
| 10101 | * (so the leading dot of a dotted edge sits at the corner of the |
| 10102 | * two borders' centre-lines rather than poking past it). |
| 10103 | * |
| 10104 | * @return array{float, float, float, float} |
| 10105 | */ |
| 10106 | private function dashedSideEndpoints( |
| 10107 | string $axis, |
| 10108 | float $x, |
| 10109 | float $y, |
| 10110 | float $width, |
| 10111 | float $height, |
| 10112 | float $inset, |
| 10113 | ): array { |
| 10114 | if ($axis === 'horizontal') { |
| 10115 | $midPdfY = $this->pageHeight - ($y + $height / 2.0); |
| 10116 | return [$x + $inset, $midPdfY, $x + $width - $inset, $midPdfY]; |
| 10117 | } |
| 10118 | $midX = $x + $width / 2.0; |
| 10119 | $topPdfY = $this->pageHeight - $y - $inset; |
| 10120 | $bottomPdfY = $this->pageHeight - ($y + $height) + $inset; |
| 10121 | return [$midX, $topPdfY, $midX, $bottomPdfY]; |
| 10122 | } |
| 10123 | |
| 10124 | /** |
| 10125 | * Resolve the per-side colour for CSS Backgrounds 3 §5.2 3D-style |
| 10126 | * borders. The light source is conventionally top-left: |
| 10127 | * |
| 10128 | * - `inset` → top + left use a darker variant (carved-in look). |
| 10129 | * - `outset` → bottom + right use a darker variant (raised look). |
| 10130 | * - `groove` → top + left darker, bottom + right lighter (etched in). |
| 10131 | * - `ridge` → top + left lighter, bottom + right darker (raised ridge). |
| 10132 | * |
| 10133 | * "Darker" multiplies each RGB channel by 0.5; "lighter" lightens |
| 10134 | * toward white by 30%. These match common browser approximations. |
| 10135 | */ |
| 10136 | private function resolve3dBorderColor(string $styleName, Color $base, string $side): Color |
| 10137 | { |
| 10138 | $isTopLeft = $side === 'top' || $side === 'left'; |
| 10139 | $darken = static function (Color $c): Color { |
| 10140 | return new Color($c->r * 0.5, $c->g * 0.5, $c->b * 0.5, $c->a, $c->space); |
| 10141 | }; |
| 10142 | $lighten = static function (Color $c): Color { |
| 10143 | return new Color( |
| 10144 | $c->r + (1.0 - $c->r) * 0.3, |
| 10145 | $c->g + (1.0 - $c->g) * 0.3, |
| 10146 | $c->b + (1.0 - $c->b) * 0.3, |
| 10147 | $c->a, |
| 10148 | $c->space, |
| 10149 | ); |
| 10150 | }; |
| 10151 | return match ($styleName) { |
| 10152 | 'inset' => $isTopLeft ? $darken($base) : $base, |
| 10153 | 'outset' => $isTopLeft ? $base : $darken($base), |
| 10154 | 'groove' => $isTopLeft ? $darken($base) : $lighten($base), |
| 10155 | 'ridge' => $isTopLeft ? $lighten($base) : $darken($base), |
| 10156 | default => $base, |
| 10157 | }; |
| 10158 | } |
| 10159 | |
| 10160 | private function borderStyleName(Box $box, string $side): string |
| 10161 | { |
| 10162 | $value = $box->style->get("border-$side-style"); |
| 10163 | if (!$value instanceof Keyword) { |
| 10164 | return 'none'; |
| 10165 | } |
| 10166 | return strtolower($value->name); |
| 10167 | } |
| 10168 | |
| 10169 | /** |
| 10170 | * Uniform borders: same width / colour / visible-style on all 4 sides. |
| 10171 | * Enables the rounded-stroke fast path; mixed borders fall back to |
| 10172 | * straight per-side rectangles. |
| 10173 | */ |
| 10174 | private function bordersAreUniform(Box $box): bool |
| 10175 | { |
| 10176 | $g = $box->geometry; |
| 10177 | if (abs($g->borderTop - $g->borderRight) > 0.001 |
| 10178 | || abs($g->borderTop - $g->borderBottom) > 0.001 |
| 10179 | || abs($g->borderTop - $g->borderLeft) > 0.001 |
| 10180 | ) { |
| 10181 | return false; |
| 10182 | } |
| 10183 | $colorTop = $this->borderColor($box, 'top'); |
| 10184 | foreach (['right', 'bottom', 'left'] as $side) { |
| 10185 | if (!$this->borderIsVisible($box, $side)) { |
| 10186 | return false; |
| 10187 | } |
| 10188 | $c = $this->borderColor($box, $side); |
| 10189 | if ($c->r !== $colorTop->r || $c->g !== $colorTop->g || $c->b !== $colorTop->b) { |
| 10190 | return false; |
| 10191 | } |
| 10192 | } |
| 10193 | return $this->borderIsVisible($box, 'top'); |
| 10194 | } |
| 10195 | |
| 10196 | /** |
| 10197 | * Stroke a rounded-rectangle path. `x,topY,width,height` describe the |
| 10198 | * path's centreline (so the stroke straddles both inside and outside); |
| 10199 | * radii are clamped per spec. Used for uniform-border rendering when |
| 10200 | * border-radius is set. |
| 10201 | * |
| 10202 | * @param array{float, float, float, float} $radii |
| 10203 | */ |
| 10204 | private function emitRoundedStroke( |
| 10205 | ContentStream $stream, |
| 10206 | float $x, |
| 10207 | float $topY, |
| 10208 | float $width, |
| 10209 | float $height, |
| 10210 | array $radii, |
| 10211 | Color $color, |
| 10212 | float $lineWidth, |
| 10213 | ): void { |
| 10214 | $maxR = min($width, $height) / 2.0; |
| 10215 | [$rtl, $rtr, $rbr, $rbl] = array_map(static fn($r) => max(0.0, min($r, $maxR)), $radii); |
| 10216 | $k = 0.5522847498; |
| 10217 | $bottomPdfY = $this->pageHeight - $topY - $height; |
| 10218 | $topPdfY = $this->pageHeight - $topY; |
| 10219 | $stream->saveGraphicsState(); |
| 10220 | $stream->setStrokeColorRGB($color->r, $color->g, $color->b); |
| 10221 | $stream->setLineWidth($lineWidth); |
| 10222 | $stream->moveTo($x + $rtl, $topPdfY); |
| 10223 | $stream->lineTo($x + $width - $rtr, $topPdfY); |
| 10224 | if ($rtr > 0.0) { |
| 10225 | $stream->curveTo( |
| 10226 | $x + $width - $rtr + $rtr * $k, |
| 10227 | $topPdfY, |
| 10228 | $x + $width, |
| 10229 | $topPdfY - $rtr + $rtr * $k, |
| 10230 | $x + $width, |
| 10231 | $topPdfY - $rtr, |
| 10232 | ); |
| 10233 | } |
| 10234 | $stream->lineTo($x + $width, $bottomPdfY + $rbr); |
| 10235 | if ($rbr > 0.0) { |
| 10236 | $stream->curveTo( |
| 10237 | $x + $width, |
| 10238 | $bottomPdfY + $rbr - $rbr * $k, |
| 10239 | $x + $width - $rbr + $rbr * $k, |
| 10240 | $bottomPdfY, |
| 10241 | $x + $width - $rbr, |
| 10242 | $bottomPdfY, |
| 10243 | ); |
| 10244 | } |
| 10245 | $stream->lineTo($x + $rbl, $bottomPdfY); |
| 10246 | if ($rbl > 0.0) { |
| 10247 | $stream->curveTo( |
| 10248 | $x + $rbl - $rbl * $k, |
| 10249 | $bottomPdfY, |
| 10250 | $x, |
| 10251 | $bottomPdfY + $rbl - $rbl * $k, |
| 10252 | $x, |
| 10253 | $bottomPdfY + $rbl, |
| 10254 | ); |
| 10255 | } |
| 10256 | $stream->lineTo($x, $topPdfY - $rtl); |
| 10257 | if ($rtl > 0.0) { |
| 10258 | $stream->curveTo( |
| 10259 | $x, |
| 10260 | $topPdfY - $rtl + $rtl * $k, |
| 10261 | $x + $rtl - $rtl * $k, |
| 10262 | $topPdfY, |
| 10263 | $x + $rtl, |
| 10264 | $topPdfY, |
| 10265 | ); |
| 10266 | } |
| 10267 | $stream->closePath(); |
| 10268 | $stream->stroke(); |
| 10269 | $stream->restoreGraphicsState(); |
| 10270 | } |
| 10271 | |
| 10272 | /** |
| 10273 | * Paint CSS UI 3 §4 `outline`. Outlines don't take part in layout — |
| 10274 | * they're drawn just outside the border-box at `outline-offset`. We |
| 10275 | * only paint the visible outline-style values (everything except |
| 10276 | * `none` / `hidden`); `outline-width` and `outline-color` follow the |
| 10277 | * cascade. |
| 10278 | */ |
| 10279 | private function paintOutline(Box $box, ContentStream $stream): void |
| 10280 | { |
| 10281 | if ($box instanceof \Phpdftk\HtmlToPdf\Box\InlineBox |
| 10282 | || $box instanceof \Phpdftk\HtmlToPdf\Box\TextBox |
| 10283 | || $box instanceof \Phpdftk\HtmlToPdf\Box\LineBreakBox |
| 10284 | ) { |
| 10285 | return; |
| 10286 | } |
| 10287 | $style = $box->style->get('outline-style'); |
| 10288 | if (!$style instanceof Keyword) { |
| 10289 | return; |
| 10290 | } |
| 10291 | $styleName = strtolower($style->name); |
| 10292 | if ($styleName === 'none' || $styleName === 'hidden') { |
| 10293 | return; |
| 10294 | } |
| 10295 | $widthValue = $box->style->get('outline-width'); |
| 10296 | $width = match (true) { |
| 10297 | $widthValue instanceof \Phpdftk\Css\Value\Length => max(0.0, $widthValue->value), |
| 10298 | // CSS Backgrounds 3 §4.4 keyword resolution. |
| 10299 | $widthValue instanceof \Phpdftk\Css\Value\Keyword => match (strtolower($widthValue->name)) { |
| 10300 | 'thin' => 1.0, |
| 10301 | 'medium' => 3.0, |
| 10302 | 'thick' => 5.0, |
| 10303 | default => 0.0, |
| 10304 | }, |
| 10305 | default => 0.0, |
| 10306 | }; |
| 10307 | if ($width <= 0.0) { |
| 10308 | return; |
| 10309 | } |
| 10310 | $offsetValue = $box->style->get('outline-offset'); |
| 10311 | $offset = $offsetValue instanceof \Phpdftk\Css\Value\Length ? $offsetValue->value : 0.0; |
| 10312 | $colorValue = $box->style->get('outline-color'); |
| 10313 | $color = $colorValue instanceof Color ? $colorValue : ($box->style->get('color') instanceof Color |
| 10314 | ? $box->style->get('color') |
| 10315 | : new Color(0, 0, 0, 1)); |
| 10316 | |
| 10317 | $geo = $box->geometry; |
| 10318 | $outerX = $geo->x - $geo->paddingLeft - $geo->borderLeft - $offset - $width / 2; |
| 10319 | $outerY = $geo->y - $geo->paddingTop - $geo->borderTop - $offset - $width / 2; |
| 10320 | $outerWidth = $geo->paddingLeft + $geo->width + $geo->paddingRight |
| 10321 | + $geo->borderLeft + $geo->borderRight + 2 * $offset + $width; |
| 10322 | $outerHeight = $geo->paddingTop + $geo->height + $geo->paddingBottom |
| 10323 | + $geo->borderTop + $geo->borderBottom + 2 * $offset + $width; |
| 10324 | $pdfY = $this->pageHeight - $outerY - $outerHeight; |
| 10325 | $stream->saveGraphicsState(); |
| 10326 | $stream->setStrokeColorRGB($color->r, $color->g, $color->b); |
| 10327 | $stream->setLineWidth($width); |
| 10328 | // CSS Outline 3 §5 styles. `dashed` / `dotted` map onto PDF |
| 10329 | // line-dash patterns; `double` paints two concentric strokes |
| 10330 | // each `width/3` thick separated by a `width/3` gap; the rest |
| 10331 | // (`groove` / `ridge` / `inset` / `outset`) fall back to solid. |
| 10332 | if ($styleName === 'double' && $width >= 3.0) { |
| 10333 | $third = $width / 3.0; |
| 10334 | $stream->setLineWidth($third); |
| 10335 | // `$outerX`/`$outerWidth` describe the path for a CENTRED stroke |
| 10336 | // of the FULL width, so that rect sits half the outline width in |
| 10337 | // from the outline's outer edge — it is not the outer edge itself. |
| 10338 | // Each ring is `$third` thick, so its path is `($width - $third)/2` |
| 10339 | // out from (outer ring) or in from (inner ring) that centre rect. |
| 10340 | $ring = ($width - $third) / 2.0; |
| 10341 | // Outer ring: outer face flush with the outline's outer edge. |
| 10342 | $stream->rectangle( |
| 10343 | $outerX - $ring, |
| 10344 | $pdfY - $ring, |
| 10345 | $outerWidth + 2.0 * $ring, |
| 10346 | $outerHeight + 2.0 * $ring, |
| 10347 | ); |
| 10348 | $stream->stroke(); |
| 10349 | // Inner ring: inner face flush with the border box (+ offset). |
| 10350 | $stream->rectangle( |
| 10351 | $outerX + $ring, |
| 10352 | $pdfY + $ring, |
| 10353 | $outerWidth - 2.0 * $ring, |
| 10354 | $outerHeight - 2.0 * $ring, |
| 10355 | ); |
| 10356 | $stream->stroke(); |
| 10357 | $stream->restoreGraphicsState(); |
| 10358 | return; |
| 10359 | } |
| 10360 | if ($styleName === 'dashed' || $styleName === 'dotted') { |
| 10361 | $stream->setDashPattern( |
| 10362 | $styleName === 'dashed' ? [$width * 3, $width * 2] : [$width, $width * 1.5], |
| 10363 | 0, |
| 10364 | ); |
| 10365 | if ($color->a < 0.999 && $this->page !== null) { |
| 10366 | $stream->setGraphicsState($this->page->ensureOpacityState($color->a, $color->a)); |
| 10367 | } |
| 10368 | $stream->rectangle($outerX, $pdfY, $outerWidth, $outerHeight); |
| 10369 | $stream->stroke(); |
| 10370 | $stream->restoreGraphicsState(); |
| 10371 | return; |
| 10372 | } |
| 10373 | // CSS UI 3 §4 — a `solid` outline (and the groove/ridge/inset/outset |
| 10374 | // fallbacks) is a SOLID FILLED BAND from the box's outer outline edge |
| 10375 | // to its inner edge (even-odd fill), NOT a centred stroke: this fills |
| 10376 | // correctly for large outline widths and honours negative |
| 10377 | // outline-offset (which a centred stroke inverts/leaks through). |
| 10378 | $bbX = $geo->x - $geo->paddingLeft - $geo->borderLeft; |
| 10379 | $bbY = $geo->y - $geo->paddingTop - $geo->borderTop; |
| 10380 | $bbW = $geo->paddingLeft + $geo->width + $geo->paddingRight |
| 10381 | + $geo->borderLeft + $geo->borderRight; |
| 10382 | $bbH = $geo->paddingTop + $geo->height + $geo->paddingBottom |
| 10383 | + $geo->borderTop + $geo->borderBottom; |
| 10384 | // A negative outline-offset shrinks the inner edge; clamp it to a |
| 10385 | // non-negative size so the outer shape never drops below 2×width |
| 10386 | // (CSS UI 3 — outline-013). The band is always `width` thick per side, |
| 10387 | // so the outer size is the clamped inner size + 2×width; centre both |
| 10388 | // on the box so the non-clamped case still lands on the real edges. |
| 10389 | $innW = max(0.0, $bbW + 2.0 * $offset); |
| 10390 | $innH = max(0.0, $bbH + 2.0 * $offset); |
| 10391 | $outW = $innW + 2.0 * $width; |
| 10392 | $outH = $innH + 2.0 * $width; |
| 10393 | $cx = $bbX + $bbW / 2.0; |
| 10394 | $cy = $bbY + $bbH / 2.0; |
| 10395 | $outLeft = $cx - $outW / 2.0; |
| 10396 | $outTop = $cy - $outH / 2.0; |
| 10397 | $innLeft = $cx - $innW / 2.0; |
| 10398 | $innTop = $cy - $innH / 2.0; |
| 10399 | if ($color->a < 0.999 && $this->page !== null) { |
| 10400 | $stream->setGraphicsState($this->page->ensureOpacityState($color->a, $color->a)); |
| 10401 | } |
| 10402 | $stream->setFillColorRGB($color->r, $color->g, $color->b); |
| 10403 | $stream->rectangle($outLeft, $this->pageHeight - $outTop - $outH, $outW, $outH); |
| 10404 | $stream->rectangle($innLeft, $this->pageHeight - $innTop - $innH, $innW, $innH); |
| 10405 | $stream->fillEvenOdd(); |
| 10406 | $stream->restoreGraphicsState(); |
| 10407 | } |
| 10408 | |
| 10409 | /** |
| 10410 | * Stroke `column-rule` between adjacent columns inside a multi-column |
| 10411 | * container (CSS Multi-column 1 §3). Each rule is centred in its |
| 10412 | * column-gap, spans the container's content-area height, and honours |
| 10413 | * `column-rule-style` for `solid` / `dashed` / `dotted`. No-op when |
| 10414 | * the box isn't a multi-column container, the rule has zero width, or |
| 10415 | * the style is `none` / `hidden`. |
| 10416 | */ |
| 10417 | private function paintColumnRules(Box $box, ContentStream $stream): void |
| 10418 | { |
| 10419 | $mc = $box->multiColumn; |
| 10420 | if ($mc === null || $mc->columnCount < 2) { |
| 10421 | return; |
| 10422 | } |
| 10423 | if ($mc->ruleWidth <= 0.0 || $mc->ruleColor === null) { |
| 10424 | return; |
| 10425 | } |
| 10426 | $styleName = $mc->ruleStyle; |
| 10427 | if ($styleName === 'none' || $styleName === 'hidden') { |
| 10428 | return; |
| 10429 | } |
| 10430 | $geo = $box->geometry; |
| 10431 | $top = $geo->y; |
| 10432 | $height = $geo->height; |
| 10433 | if ($height <= 0.0) { |
| 10434 | return; |
| 10435 | } |
| 10436 | $pdfTop = $this->pageHeight - $top; |
| 10437 | $pdfBottom = $this->pageHeight - ($top + $height); |
| 10438 | $stream->saveGraphicsState(); |
| 10439 | $stream->setStrokeColorRGB($mc->ruleColor->r, $mc->ruleColor->g, $mc->ruleColor->b); |
| 10440 | $stream->setLineWidth($mc->ruleWidth); |
| 10441 | switch ($styleName) { |
| 10442 | case 'dashed': |
| 10443 | $stream->setDashPattern([$mc->ruleWidth * 3, $mc->ruleWidth * 2], 0); |
| 10444 | break; |
| 10445 | case 'dotted': |
| 10446 | $stream->setDashPattern([$mc->ruleWidth, $mc->ruleWidth * 1.5], 0); |
| 10447 | break; |
| 10448 | // Other styles (double / groove / ridge / inset / outset) |
| 10449 | // fall back to solid for Phase 1, mirroring the outline |
| 10450 | // painter's approximation. |
| 10451 | } |
| 10452 | for ($i = 0; $i < $mc->columnCount - 1; $i++) { |
| 10453 | // Centre line of the gap between column $i and $i+1. |
| 10454 | $gapCentreX = $geo->x |
| 10455 | + ($i + 1) * $mc->columnWidth |
| 10456 | + $i * $mc->columnGap |
| 10457 | + $mc->columnGap / 2.0; |
| 10458 | $stream->moveTo($gapCentreX, $pdfBottom); |
| 10459 | $stream->lineTo($gapCentreX, $pdfTop); |
| 10460 | $stream->stroke(); |
| 10461 | } |
| 10462 | $stream->restoreGraphicsState(); |
| 10463 | } |
| 10464 | |
| 10465 | /** |
| 10466 | * CSS Multi-column 1 §3.3 — paint a `column-fill: auto` fragmented |
| 10467 | * container. Its content was laid out in one tall column at the |
| 10468 | * container's left edge (layout y from the container origin plus |
| 10469 | * `contentOffset` down); render it |
| 10470 | * once per column, clipping to column `i`'s `columnHeight` band and |
| 10471 | * translating band `i` up into that column. Bands past the content |
| 10472 | * height simply clip to empty. |
| 10473 | */ |
| 10474 | private function paintFragmentedColumns(Box $box, ContentStream $stream, MultiColumnLayout $mc): void |
| 10475 | { |
| 10476 | if ($mc->runs !== []) { |
| 10477 | $this->paintColumnRuns($box, $stream, $mc); |
| 10478 | return; |
| 10479 | } |
| 10480 | $colW = $mc->columnWidth; |
| 10481 | $gap = $mc->columnGap; |
| 10482 | $height = $mc->columnHeight; |
| 10483 | if ($height <= 0.0 || $colW <= 0.0) { |
| 10484 | // Degenerate — fall back to a single unsliced pass. |
| 10485 | foreach ($this->paintOrderChildren($box) as $child) { |
| 10486 | $this->paintBox($child, $stream, $box); |
| 10487 | } |
| 10488 | return; |
| 10489 | } |
| 10490 | $baseX = $box->geometry->x; |
| 10491 | // Relative origin — see `paintSlicedColumnRun`: the container can |
| 10492 | // still be moved after layout recorded the slice. |
| 10493 | $contentTop = $box->geometry->y + $mc->contentOffset; |
| 10494 | $children = $this->paintOrderChildren($box); |
| 10495 | if ($mc->columnWrap) { |
| 10496 | // CSS Multi-column 2 §3 — `column-wrap: wrap`: slice the tall |
| 10497 | // content into bands of `columnHeight` and place band `i` at grid |
| 10498 | // cell (col = i mod columnCount, row = i div columnCount), filling |
| 10499 | // a row of columns left→right then wrapping to the next row. |
| 10500 | $rowGap = $mc->rowGap; |
| 10501 | $bands = (int) ceil($mc->contentHeight / $height - 1e-6); |
| 10502 | $bands = max(1, $bands); |
| 10503 | for ($i = 0; $i < $bands; $i++) { |
| 10504 | $col = $i % $mc->columnCount; |
| 10505 | $row = intdiv($i, $mc->columnCount); |
| 10506 | $colX = $baseX + $col * ($colW + $gap); |
| 10507 | $rowTop = $contentTop + $row * ($height + $rowGap); |
| 10508 | $stream->saveGraphicsState(); |
| 10509 | $clipPdfY = $this->pageHeight - ($rowTop + $height); |
| 10510 | $stream->rectangle($colX, $clipPdfY, $colW, $height); |
| 10511 | $stream->clip(); |
| 10512 | $stream->endPath(); |
| 10513 | // Band i (tall layout-y = contentTop + i·height) → grid cell: |
| 10514 | // PDF translate dy = i·height − row·(height+rowGap). |
| 10515 | $dy = $i * $height - $row * ($height + $rowGap); |
| 10516 | $stream->concatMatrix(1.0, 0.0, 0.0, 1.0, $col * ($colW + $gap), $dy); |
| 10517 | foreach ($children as $child) { |
| 10518 | $this->paintBox($child, $stream, $box); |
| 10519 | } |
| 10520 | $stream->restoreGraphicsState(); |
| 10521 | } |
| 10522 | return; |
| 10523 | } |
| 10524 | for ($i = 0; $i < $mc->columnCount; $i++) { |
| 10525 | $colX = $baseX + $i * ($colW + $gap); |
| 10526 | $stream->saveGraphicsState(); |
| 10527 | // Clip to column i's band: layout rect [colX, contentTop, colW, |
| 10528 | // height] → PDF y = pageHeight − (contentTop + height). |
| 10529 | $clipPdfY = $this->pageHeight - ($contentTop + $height); |
| 10530 | $stream->rectangle($colX, $clipPdfY, $colW, $height); |
| 10531 | $stream->clip(); |
| 10532 | $stream->endPath(); |
| 10533 | // Translate band i into this column: layout (dx = i·(colW+gap), |
| 10534 | // dy = −i·height) → PDF (dx, +i·height). |
| 10535 | if ($i > 0) { |
| 10536 | $stream->concatMatrix(1.0, 0.0, 0.0, 1.0, $i * ($colW + $gap), $i * $height); |
| 10537 | } |
| 10538 | foreach ($children as $child) { |
| 10539 | $this->paintBox($child, $stream, $box); |
| 10540 | } |
| 10541 | $stream->restoreGraphicsState(); |
| 10542 | } |
| 10543 | } |
| 10544 | |
| 10545 | /** |
| 10546 | * CSS Multi-column 1 §3.3 + §6.2 — paint a container whose content |
| 10547 | * layout carved into fragmented columnar runs |
| 10548 | * ({@see \Phpdftk\HtmlToPdf\Layout\ColumnRun}). |
| 10549 | * |
| 10550 | * Each run's children were stacked as ONE TALL column; slice that |
| 10551 | * column into the run's bands here. Children belonging to no run — |
| 10552 | * `column-span: all` spanners — paint once, unsliced, exactly where |
| 10553 | * layout put them. A run paints at the position its first child holds |
| 10554 | * in paint order, so z-index and Appendix E sub-layering still order |
| 10555 | * the spanners against the runs around them. |
| 10556 | */ |
| 10557 | private function paintColumnRuns(Box $box, ContentStream $stream, MultiColumnLayout $mc): void |
| 10558 | { |
| 10559 | $order = $this->paintOrderChildren($box); |
| 10560 | /** @var array<int, int> $runOf spl_object_id → run index */ |
| 10561 | $runOf = []; |
| 10562 | foreach ($mc->runs as $index => $run) { |
| 10563 | foreach ($run->children as $child) { |
| 10564 | $runOf[spl_object_id($child)] = $index; |
| 10565 | } |
| 10566 | } |
| 10567 | /** @var array<int, true> $painted */ |
| 10568 | $painted = []; |
| 10569 | foreach ($order as $child) { |
| 10570 | $index = $runOf[spl_object_id($child)] ?? null; |
| 10571 | if ($index === null) { |
| 10572 | $this->paintBox($child, $stream, $box); |
| 10573 | continue; |
| 10574 | } |
| 10575 | if (isset($painted[$index])) { |
| 10576 | continue; |
| 10577 | } |
| 10578 | $painted[$index] = true; |
| 10579 | $runChildren = []; |
| 10580 | foreach ($order as $candidate) { |
| 10581 | if (($runOf[spl_object_id($candidate)] ?? null) === $index) { |
| 10582 | $runChildren[] = $candidate; |
| 10583 | } |
| 10584 | } |
| 10585 | $this->paintSlicedColumnRun($box, $stream, $mc, $mc->runs[$index], $runChildren); |
| 10586 | } |
| 10587 | } |
| 10588 | |
| 10589 | /** |
| 10590 | * Draw one {@see \Phpdftk\HtmlToPdf\Layout\ColumnRun}: render its tall |
| 10591 | * column once per band, clipped to that band's destination column and |
| 10592 | * translated up into it. Mirrors the single-run `column-fill: auto` |
| 10593 | * slicing in {@see paintFragmentedColumns}, but reads the height and |
| 10594 | * band count from the run rather than the container. |
| 10595 | * |
| 10596 | * @param list<Box> $children |
| 10597 | */ |
| 10598 | private function paintSlicedColumnRun( |
| 10599 | Box $box, |
| 10600 | ContentStream $stream, |
| 10601 | MultiColumnLayout $mc, |
| 10602 | \Phpdftk\HtmlToPdf\Layout\ColumnRun $run, |
| 10603 | array $children, |
| 10604 | ): void { |
| 10605 | $colW = $mc->columnWidth; |
| 10606 | $gap = $mc->columnGap; |
| 10607 | $height = $run->columnHeight; |
| 10608 | if ($height <= 0.0 || $colW <= 0.0) { |
| 10609 | foreach ($children as $child) { |
| 10610 | $this->paintBox($child, $stream, $box); |
| 10611 | } |
| 10612 | return; |
| 10613 | } |
| 10614 | $baseX = $box->geometry->x; |
| 10615 | // The run's origin is stored RELATIVE to the container: block |
| 10616 | // layout can still move a multi-column box after its runs are |
| 10617 | // recorded (margin collapsing pulls it up by the previous sibling's |
| 10618 | // bottom margin), and the children move with it, so an absolute |
| 10619 | // origin would leave the bands clipping empty space. |
| 10620 | $contentTop = $box->geometry->y + $run->contentOffset; |
| 10621 | // Band i lives at layout-y `contentTop + i·height`; the clip is the |
| 10622 | // DESTINATION band, so it is emitted before the translate and stays |
| 10623 | // at band 0's vertical slot for every column. |
| 10624 | $clipPdfY = $this->pageHeight - ($contentTop + $height); |
| 10625 | for ($i = 0; $i < $run->bandCount; $i++) { |
| 10626 | $colX = $baseX + $i * ($colW + $gap); |
| 10627 | $stream->saveGraphicsState(); |
| 10628 | $stream->rectangle($colX, $clipPdfY, $colW, $height); |
| 10629 | $stream->clip(); |
| 10630 | $stream->endPath(); |
| 10631 | if ($i > 0) { |
| 10632 | $stream->concatMatrix(1.0, 0.0, 0.0, 1.0, $i * ($colW + $gap), $i * $height); |
| 10633 | } |
| 10634 | foreach ($children as $child) { |
| 10635 | $this->paintBox($child, $stream, $box); |
| 10636 | } |
| 10637 | $stream->restoreGraphicsState(); |
| 10638 | } |
| 10639 | } |
| 10640 | |
| 10641 | /** |
| 10642 | * CSS Gaps 1 — paint the `column-rule` / `row-rule` decorations in a |
| 10643 | * grid container's gaps. The segments — already carrying their break |
| 10644 | * points, per-item visibility and endpoint insets — were resolved |
| 10645 | * during layout by |
| 10646 | * {@see \Phpdftk\HtmlToPdf\Layout\BlockLayout::computeGridGapRuleSegments()}; |
| 10647 | * here they are Y-flipped into PDF space and handed to the shared |
| 10648 | * {@see strokeGapRule()} helper. |
| 10649 | */ |
| 10650 | private function paintGridGapRules(Box $box, ContentStream $stream): void |
| 10651 | { |
| 10652 | if (!$box instanceof \Phpdftk\HtmlToPdf\Box\GridBox) { |
| 10653 | return; |
| 10654 | } |
| 10655 | if ($box->gapRuleSegments === []) { |
| 10656 | return; |
| 10657 | } |
| 10658 | $stream->saveGraphicsState(); |
| 10659 | // CSS Gaps 1 + CSS Overflow 3 — a scroll container (`overflow` |
| 10660 | // other than `visible`) clips its gap decorations to the padding |
| 10661 | // box, so an overflowing grid's rules don't extend past the |
| 10662 | // visible edge (WPT grid-gap-decorations 035-037 clip a 320px |
| 10663 | // track area to a 130px box). `overflow: visible` intentionally |
| 10664 | // lets rule ink spill past the container (029/090/091), so only |
| 10665 | // clip when overflow is not visible. |
| 10666 | if ($this->shouldOverflowClip($box)) { |
| 10667 | $g = $box->geometry; |
| 10668 | $padLeft = $g->x - $g->paddingLeft; |
| 10669 | $padTop = $g->y - $g->paddingTop; |
| 10670 | $padWidth = $g->paddingLeft + $g->width + $g->paddingRight; |
| 10671 | $padHeight = $g->paddingTop + $g->height + $g->paddingBottom; |
| 10672 | $stream->rectangle($padLeft, $this->pageHeight - $padTop - $padHeight, $padWidth, $padHeight); |
| 10673 | $stream->clip(); |
| 10674 | $stream->endPath(); |
| 10675 | } |
| 10676 | // The segments are stored relative to the container's content-box |
| 10677 | // origin (layout cannot know the box's final absolute position), |
| 10678 | // so re-anchor on the box's geometry before the Y-flip. |
| 10679 | $originX = $box->geometry->x; |
| 10680 | $originY = $box->geometry->y; |
| 10681 | foreach ($box->gapRuleSegments as $seg) { |
| 10682 | $this->strokeGapRule( |
| 10683 | $box, |
| 10684 | $stream, |
| 10685 | $seg['prefix'], |
| 10686 | $originX + $seg['x1'], |
| 10687 | $this->pageHeight - $originY - $seg['y1'], |
| 10688 | $originX + $seg['x2'], |
| 10689 | $this->pageHeight - $originY - $seg['y2'], |
| 10690 | ); |
| 10691 | } |
| 10692 | $stream->restoreGraphicsState(); |
| 10693 | } |
| 10694 | |
| 10695 | /** |
| 10696 | * CSS Gaps 1 — paint the `column-rule` / `row-rule` decorations in a |
| 10697 | * flex container's gaps. The segments (in top-down layout space) were |
| 10698 | * resolved per flex line during layout; here they are Y-flipped into |
| 10699 | * PDF space and stroked with the shared {@see strokeGapRule()} helper. |
| 10700 | * No-op for non-flex boxes or when no segments were recorded. |
| 10701 | */ |
| 10702 | private function paintFlexGapRules(Box $box, ContentStream $stream): void |
| 10703 | { |
| 10704 | if (!$box instanceof \Phpdftk\HtmlToPdf\Box\FlexBox) { |
| 10705 | return; |
| 10706 | } |
| 10707 | if ($box->gapRuleSegments === []) { |
| 10708 | return; |
| 10709 | } |
| 10710 | $stream->saveGraphicsState(); |
| 10711 | // Mirror the grid painter: a scroll container (`overflow` other |
| 10712 | // than `visible`) clips its gap decorations to the padding box. |
| 10713 | if ($this->shouldOverflowClip($box)) { |
| 10714 | $g = $box->geometry; |
| 10715 | $padLeft = $g->x - $g->paddingLeft; |
| 10716 | $padTop = $g->y - $g->paddingTop; |
| 10717 | $padWidth = $g->paddingLeft + $g->width + $g->paddingRight; |
| 10718 | $padHeight = $g->paddingTop + $g->height + $g->paddingBottom; |
| 10719 | $stream->rectangle($padLeft, $this->pageHeight - $padTop - $padHeight, $padWidth, $padHeight); |
| 10720 | $stream->clip(); |
| 10721 | $stream->endPath(); |
| 10722 | } |
| 10723 | // The segments are stored relative to the container's content-box |
| 10724 | // origin (layout cannot know the box's final absolute position), |
| 10725 | // so re-anchor on the box's geometry before the Y-flip. |
| 10726 | $originX = $box->geometry->x; |
| 10727 | $originY = $box->geometry->y; |
| 10728 | foreach ($box->gapRuleSegments as $seg) { |
| 10729 | $this->strokeGapRule( |
| 10730 | $box, |
| 10731 | $stream, |
| 10732 | $seg['prefix'], |
| 10733 | $originX + $seg['x1'], |
| 10734 | $this->pageHeight - $originY - $seg['y1'], |
| 10735 | $originX + $seg['x2'], |
| 10736 | $this->pageHeight - $originY - $seg['y2'], |
| 10737 | ); |
| 10738 | } |
| 10739 | $stream->restoreGraphicsState(); |
| 10740 | } |
| 10741 | |
| 10742 | /** |
| 10743 | * Stroke a single gap-decoration rule between two PDF-space points, |
| 10744 | * reading `<prefix>-width` / `-style` / `-color` off the box. No-op |
| 10745 | * when the rule is invisible (zero width, `none` / `hidden` style, or |
| 10746 | * a fully transparent colour). |
| 10747 | */ |
| 10748 | private function strokeGapRule( |
| 10749 | Box $box, |
| 10750 | ContentStream $stream, |
| 10751 | string $prefix, |
| 10752 | float $x1, |
| 10753 | float $y1, |
| 10754 | float $x2, |
| 10755 | float $y2, |
| 10756 | ): void { |
| 10757 | $styleV = $box->style->get("$prefix-style"); |
| 10758 | $styleName = $styleV instanceof Keyword ? strtolower($styleV->name) : 'none'; |
| 10759 | if ($styleName === 'none' || $styleName === 'hidden') { |
| 10760 | return; |
| 10761 | } |
| 10762 | $widthV = $box->style->get("$prefix-width"); |
| 10763 | $width = $widthV instanceof \Phpdftk\Css\Value\Length ? $widthV->value : 0.0; |
| 10764 | if ($width <= 0.0) { |
| 10765 | return; |
| 10766 | } |
| 10767 | $color = $this->ruleColor($box, "$prefix-color"); |
| 10768 | if ($color->a <= 0.0) { |
| 10769 | return; |
| 10770 | } |
| 10771 | $stream->saveGraphicsState(); |
| 10772 | // A solid rule covers exactly the same shape as a border edge, so |
| 10773 | // FILL the rectangle it occupies rather than stroking a centre-line. |
| 10774 | // The rasteriser snaps a stroke's half-pixel edges differently from |
| 10775 | // a filled box, and every CSS Gaps reference draws the expected |
| 10776 | // rule as a bordered / `background`-filled element — so stroking |
| 10777 | // landed the rule one device pixel off whenever `width / 2` fell |
| 10778 | // mid-pixel (a 5px rule centred on x=105 covered 103..107 instead |
| 10779 | // of the reference's 102..106). |
| 10780 | if ($styleName !== 'dashed' && $styleName !== 'dotted') { |
| 10781 | $half = $width / 2.0; |
| 10782 | $stream->setFillColorRGB($color->r, $color->g, $color->b); |
| 10783 | if (abs($x1 - $x2) < abs($y1 - $y2)) { |
| 10784 | // Vertical rule: fixed x, spanning y. |
| 10785 | $stream->rectangle(min($x1, $x2) - $half, min($y1, $y2), $width, abs($y2 - $y1)); |
| 10786 | } else { |
| 10787 | // Horizontal rule: fixed y, spanning x. |
| 10788 | $stream->rectangle(min($x1, $x2), min($y1, $y2) - $half, abs($x2 - $x1), $width); |
| 10789 | } |
| 10790 | $stream->fill(); |
| 10791 | $stream->restoreGraphicsState(); |
| 10792 | |
| 10793 | return; |
| 10794 | } |
| 10795 | $stream->setStrokeColorRGB($color->r, $color->g, $color->b); |
| 10796 | $stream->setLineWidth($width); |
| 10797 | if ($styleName === 'dashed') { |
| 10798 | $stream->setDashPattern([$width * 3, $width * 2], 0); |
| 10799 | } else { |
| 10800 | $stream->setDashPattern([$width, $width * 1.5], 0); |
| 10801 | } |
| 10802 | $stream->moveTo($x1, $y1); |
| 10803 | $stream->lineTo($x2, $y2); |
| 10804 | $stream->stroke(); |
| 10805 | $stream->restoreGraphicsState(); |
| 10806 | } |
| 10807 | |
| 10808 | /** |
| 10809 | * Resolve a gap-rule colour property, mapping `currentcolor` to the |
| 10810 | * box's `color`. Mirrors {@see borderColor()}. |
| 10811 | */ |
| 10812 | private function ruleColor(Box $box, string $prop): Color |
| 10813 | { |
| 10814 | $color = $box->style->get($prop); |
| 10815 | if ($color instanceof Color) { |
| 10816 | return $color; |
| 10817 | } |
| 10818 | $current = $box->style->get('color'); |
| 10819 | if ($current instanceof Color) { |
| 10820 | return $current; |
| 10821 | } |
| 10822 | return new Color(0, 0, 0, 1); |
| 10823 | } |
| 10824 | |
| 10825 | private function borderIsVisible(Box $box, string $side): bool |
| 10826 | { |
| 10827 | $style = $box->style->get("border-$side-style"); |
| 10828 | if (!$style instanceof Keyword) { |
| 10829 | return false; |
| 10830 | } |
| 10831 | $lower = strtolower($style->name); |
| 10832 | if ($lower === 'none' || $lower === 'hidden') { |
| 10833 | return false; |
| 10834 | } |
| 10835 | // CSS Backgrounds 3 §4.4: a fully transparent border colour |
| 10836 | // contributes nothing visible — skipping the paint avoids drawing |
| 10837 | // a black bar where the alpha=0 value would otherwise resolve |
| 10838 | // through the DeviceRGB `rg` operator (which has no alpha). |
| 10839 | return $this->borderColor($box, $side)->a > 0.0; |
| 10840 | } |
| 10841 | |
| 10842 | private function borderColor(Box $box, string $side): Color |
| 10843 | { |
| 10844 | $color = $box->style->get("border-$side-color"); |
| 10845 | if ($color instanceof Color) { |
| 10846 | return $color; |
| 10847 | } |
| 10848 | // CSS Colors 4: border-color initial is currentColor, which means |
| 10849 | // the cascaded `color` property. |
| 10850 | $current = $box->style->get('color'); |
| 10851 | if ($current instanceof Color) { |
| 10852 | return $current; |
| 10853 | } |
| 10854 | return new Color(0, 0, 0, 1); |
| 10855 | } |
| 10856 | |
| 10857 | /** |
| 10858 | * Emit a rect in PDF coordinates (Y flipped from top-down layout space). |
| 10859 | * `topY` is the layout-space top edge; `height` is positive downward. |
| 10860 | */ |
| 10861 | private function emitRect( |
| 10862 | ContentStream $stream, |
| 10863 | float $x, |
| 10864 | float $topY, |
| 10865 | float $width, |
| 10866 | float $height, |
| 10867 | Color $fill, |
| 10868 | ): void { |
| 10869 | $pdfY = $this->pageHeight - $topY - $height; |
| 10870 | $stream->saveGraphicsState(); |
| 10871 | // CSS Color §10 — translucent fills (Color::a < 1) need to |
| 10872 | // composite over whatever's underneath; that's an ExtGState |
| 10873 | // dictionary in PDF with /ca for non-stroke and /CA for |
| 10874 | // stroke. Without it the painter would emit a fully-opaque |
| 10875 | // rect even when the cascaded color said e.g. `rgba(0,0,0, |
| 10876 | // 0.6)`, masking the background entirely. WPT t422-rgba-* |
| 10877 | // exercise this with checkerboards behind translucent bands. |
| 10878 | if ($fill->a < 0.999 && $this->page !== null) { |
| 10879 | $alphaName = $this->page->ensureOpacityState($fill->a, $fill->a); |
| 10880 | $stream->setGraphicsState($alphaName); |
| 10881 | } |
| 10882 | $stream->setFillColorRGB($fill->r, $fill->g, $fill->b); |
| 10883 | $stream->rectangle($x, $pdfY, $width, $height); |
| 10884 | $stream->fill(); |
| 10885 | $stream->restoreGraphicsState(); |
| 10886 | } |
| 10887 | |
| 10888 | /** |
| 10889 | * Read the box's four corner radii in pixel-equivalent units. CSS |
| 10890 | * Backgrounds 3 §6 requires each radius to be clamped to half the |
| 10891 | * shorter side; we do that here. |
| 10892 | * |
| 10893 | * @return array{float, float, float, float} [tl, tr, br, bl] |
| 10894 | */ |
| 10895 | private function borderRadii(Box $box): array |
| 10896 | { |
| 10897 | $read = function (string $name) use ($box): float { |
| 10898 | $v = $box->style->get($name); |
| 10899 | return $v instanceof \Phpdftk\Css\Value\Length ? max(0.0, $v->value) : 0.0; |
| 10900 | }; |
| 10901 | return [ |
| 10902 | $read('border-top-left-radius'), |
| 10903 | $read('border-top-right-radius'), |
| 10904 | $read('border-bottom-right-radius'), |
| 10905 | $read('border-bottom-left-radius'), |
| 10906 | ]; |
| 10907 | } |
| 10908 | |
| 10909 | /** |
| 10910 | * Per-corner border radii as `[horizontal, vertical]` pairs (CSS |
| 10911 | * Backgrounds 3 §5.1). Resolves `<length>`, `<percentage>` (horizontal % |
| 10912 | * of `$width`, vertical % of `$height`) and the two-value elliptical form |
| 10913 | * (`border-top-right-radius: 75px 50px`). Order: [TL, TR, BR, BL]. A |
| 10914 | * single-value corner yields a circular `[r, r]`, so this is a superset |
| 10915 | * of {@see borderRadii}. |
| 10916 | * |
| 10917 | * @return array{array{float,float}, array{float,float}, array{float,float}, array{float,float}} |
| 10918 | */ |
| 10919 | private function borderRadiiXY(Box $box, float $width, float $height): array |
| 10920 | { |
| 10921 | $corner = function (string $name) use ($box, $width, $height): array { |
| 10922 | $v = $box->style->get($name); |
| 10923 | if ($v instanceof \Phpdftk\Css\Value\ValueList && $v->values !== []) { |
| 10924 | $h = $v->values[0]; |
| 10925 | $vv = $v->values[1] ?? $v->values[0]; |
| 10926 | return [ |
| 10927 | $this->resolveRadiusComponent($h, $width), |
| 10928 | $this->resolveRadiusComponent($vv, $height), |
| 10929 | ]; |
| 10930 | } |
| 10931 | return [ |
| 10932 | $this->resolveRadiusComponent($v, $width), |
| 10933 | $this->resolveRadiusComponent($v, $height), |
| 10934 | ]; |
| 10935 | }; |
| 10936 | return [ |
| 10937 | $corner('border-top-left-radius'), |
| 10938 | $corner('border-top-right-radius'), |
| 10939 | $corner('border-bottom-right-radius'), |
| 10940 | $corner('border-bottom-left-radius'), |
| 10941 | ]; |
| 10942 | } |
| 10943 | |
| 10944 | private function resolveRadiusComponent(?\Phpdftk\Css\Value\Value $v, float $extent): float |
| 10945 | { |
| 10946 | if ($v instanceof \Phpdftk\Css\Value\Length) { |
| 10947 | return max(0.0, $v->value); |
| 10948 | } |
| 10949 | if ($v instanceof \Phpdftk\Css\Value\Percentage) { |
| 10950 | return max(0.0, $v->value / 100.0 * $extent); |
| 10951 | } |
| 10952 | return 0.0; |
| 10953 | } |
| 10954 | |
| 10955 | /** |
| 10956 | * @param array<array{float,float}> $radii |
| 10957 | */ |
| 10958 | private function radiiAnyPositive(array $radii): bool |
| 10959 | { |
| 10960 | foreach ($radii as $r) { |
| 10961 | if ($r[0] > 0.0 || $r[1] > 0.0) { |
| 10962 | return true; |
| 10963 | } |
| 10964 | } |
| 10965 | return false; |
| 10966 | } |
| 10967 | |
| 10968 | /** |
| 10969 | * Emit a rounded-rectangle fill path using cubic Béziers at the four |
| 10970 | * corners. Topology in layout-Y (top-down) with the painter's flip |
| 10971 | * applied at emission time. The 0.5522847498 constant is the standard |
| 10972 | * cubic-Bézier circle approximation factor. |
| 10973 | * |
| 10974 | * Each corner is an `[rx, ry]` pair (elliptical corners, CSS Backgrounds |
| 10975 | * 3 §5.1); `rx == ry` gives the circular case (byte-identical to the old |
| 10976 | * scalar path). |
| 10977 | * |
| 10978 | * @param array{array{float,float}, array{float,float}, array{float,float}, array{float,float}} $radii [tl, tr, br, bl] |
| 10979 | * @param list<string> $shapes [tl, tr, br, bl] corner shapes; empty → all round |
| 10980 | */ |
| 10981 | private function emitRoundedFill( |
| 10982 | ContentStream $stream, |
| 10983 | float $x, |
| 10984 | float $topY, |
| 10985 | float $width, |
| 10986 | float $height, |
| 10987 | array $radii, |
| 10988 | Color $fill, |
| 10989 | array $shapes = [], |
| 10990 | ): void { |
| 10991 | $stream->saveGraphicsState(); |
| 10992 | $stream->setFillColorRGB($fill->r, $fill->g, $fill->b); |
| 10993 | $this->buildRoundedRectPath($stream, $x, $topY, $width, $height, $radii, $shapes); |
| 10994 | $stream->fill(); |
| 10995 | $stream->restoreGraphicsState(); |
| 10996 | } |
| 10997 | |
| 10998 | /** |
| 10999 | * Emit a rounded-rectangle SUBPATH (moveTo → lineTo/curveTo → closePath) |
| 11000 | * in PDF coords, without any graphics-state / colour / paint operator, so |
| 11001 | * callers can either fill or `clip` it. Each corner is an `[rx, ry]` pair |
| 11002 | * (elliptical). Layout-Y (top-down) in, PDF-Y flip applied here. |
| 11003 | * |
| 11004 | * Each corner may carry a CSS Borders 4 `corner-shape` (`$shapes` as |
| 11005 | * `[tl, tr, br, bl]` strings): `round` (arc, the default), `bevel` |
| 11006 | * (straight chamfer), `square` (fills to the box corner), `notch` |
| 11007 | * (inward square), or `scoop` (concave arc). An empty `$shapes` keeps |
| 11008 | * every corner round (byte-identical to the pre-corner-shape path). |
| 11009 | * |
| 11010 | * @param array{array{float,float}, array{float,float}, array{float,float}, array{float,float}} $radii [tl, tr, br, bl] |
| 11011 | * @param list<string> $shapes [tl, tr, br, bl] corner shapes; empty → all round |
| 11012 | */ |
| 11013 | private function buildRoundedRectPath( |
| 11014 | ContentStream $stream, |
| 11015 | float $x, |
| 11016 | float $topY, |
| 11017 | float $width, |
| 11018 | float $height, |
| 11019 | array $radii, |
| 11020 | array $shapes = [], |
| 11021 | ): void { |
| 11022 | $clamp = static fn(array $r): array => [ |
| 11023 | min(max(0.0, $r[0]), $width / 2.0), |
| 11024 | min(max(0.0, $r[1]), $height / 2.0), |
| 11025 | ]; |
| 11026 | [$tl, $tr, $br, $bl] = array_map($clamp, $radii); |
| 11027 | $shapeTl = $shapes[0] ?? 'round'; |
| 11028 | $shapeTr = $shapes[1] ?? 'round'; |
| 11029 | $shapeBr = $shapes[2] ?? 'round'; |
| 11030 | $shapeBl = $shapes[3] ?? 'round'; |
| 11031 | $bottomPdfY = $this->pageHeight - $topY - $height; |
| 11032 | $topPdfY = $this->pageHeight - $topY; |
| 11033 | // Walk clockwise starting at the top-left straight edge. Each corner |
| 11034 | // runs from its incoming edge point (A) to the outgoing edge point (B), |
| 11035 | // shaped around either the box corner (convex) or the inner corner |
| 11036 | // (concave) per `corner-shape`. |
| 11037 | $stream->moveTo($x + $tl[0], $topPdfY); |
| 11038 | $stream->lineTo($x + $width - $tr[0], $topPdfY); |
| 11039 | $this->emitCornerSegment( |
| 11040 | $stream, |
| 11041 | $shapeTr, |
| 11042 | $x + $width - $tr[0], |
| 11043 | $topPdfY, |
| 11044 | $x + $width, |
| 11045 | $topPdfY - $tr[1], |
| 11046 | $x + $width, |
| 11047 | $topPdfY, |
| 11048 | ); |
| 11049 | $stream->lineTo($x + $width, $bottomPdfY + $br[1]); |
| 11050 | $this->emitCornerSegment( |
| 11051 | $stream, |
| 11052 | $shapeBr, |
| 11053 | $x + $width, |
| 11054 | $bottomPdfY + $br[1], |
| 11055 | $x + $width - $br[0], |
| 11056 | $bottomPdfY, |
| 11057 | $x + $width, |
| 11058 | $bottomPdfY, |
| 11059 | ); |
| 11060 | $stream->lineTo($x + $bl[0], $bottomPdfY); |
| 11061 | $this->emitCornerSegment( |
| 11062 | $stream, |
| 11063 | $shapeBl, |
| 11064 | $x + $bl[0], |
| 11065 | $bottomPdfY, |
| 11066 | $x, |
| 11067 | $bottomPdfY + $bl[1], |
| 11068 | $x, |
| 11069 | $bottomPdfY, |
| 11070 | ); |
| 11071 | $stream->lineTo($x, $topPdfY - $tl[1]); |
| 11072 | $this->emitCornerSegment( |
| 11073 | $stream, |
| 11074 | $shapeTl, |
| 11075 | $x, |
| 11076 | $topPdfY - $tl[1], |
| 11077 | $x + $tl[0], |
| 11078 | $topPdfY, |
| 11079 | $x, |
| 11080 | $topPdfY, |
| 11081 | ); |
| 11082 | $stream->closePath(); |
| 11083 | } |
| 11084 | |
| 11085 | /** |
| 11086 | * Emit one corner of {@see buildRoundedRectPath()} from the current point |
| 11087 | * A=(ax,ay) to B=(bx,by), shaped per `corner-shape`. `(boxX,boxY)` is the |
| 11088 | * physical box corner (the convex direction); the inner corner (concave |
| 11089 | * direction) is its reflection A+B−box. The 0.5522847498 constant is the |
| 11090 | * standard cubic-Bézier quarter-ellipse factor. |
| 11091 | */ |
| 11092 | private function emitCornerSegment( |
| 11093 | ContentStream $stream, |
| 11094 | string $shape, |
| 11095 | float $ax, |
| 11096 | float $ay, |
| 11097 | float $bx, |
| 11098 | float $by, |
| 11099 | float $boxX, |
| 11100 | float $boxY, |
| 11101 | ): void { |
| 11102 | // Zero-radius corner: A == B, nothing to add (the edge lineTos meet |
| 11103 | // at the box corner already). |
| 11104 | if ($ax === $bx && $ay === $by) { |
| 11105 | return; |
| 11106 | } |
| 11107 | $k = 0.5522847498; |
| 11108 | $innerX = $ax + $bx - $boxX; |
| 11109 | $innerY = $ay + $by - $boxY; |
| 11110 | switch ($shape) { |
| 11111 | case 'bevel': |
| 11112 | $stream->lineTo($bx, $by); |
| 11113 | return; |
| 11114 | case 'square': |
| 11115 | $stream->lineTo($boxX, $boxY); |
| 11116 | $stream->lineTo($bx, $by); |
| 11117 | return; |
| 11118 | case 'notch': |
| 11119 | $stream->lineTo($innerX, $innerY); |
| 11120 | $stream->lineTo($bx, $by); |
| 11121 | return; |
| 11122 | case 'scoop': |
| 11123 | // Concave quarter: pull the Bézier handles toward the inner |
| 11124 | // corner instead of the box corner. |
| 11125 | $stream->curveTo( |
| 11126 | $ax + $k * ($innerX - $ax), |
| 11127 | $ay + $k * ($innerY - $ay), |
| 11128 | $bx + $k * ($innerX - $bx), |
| 11129 | $by + $k * ($innerY - $by), |
| 11130 | $bx, |
| 11131 | $by, |
| 11132 | ); |
| 11133 | return; |
| 11134 | case 'round': |
| 11135 | case 'squircle': |
| 11136 | default: |
| 11137 | // Convex quarter-ellipse toward the box corner. |
| 11138 | $stream->curveTo( |
| 11139 | $ax + $k * ($boxX - $ax), |
| 11140 | $ay + $k * ($boxY - $ay), |
| 11141 | $bx + $k * ($boxX - $bx), |
| 11142 | $by + $k * ($boxY - $by), |
| 11143 | $bx, |
| 11144 | $by, |
| 11145 | ); |
| 11146 | return; |
| 11147 | } |
| 11148 | } |
| 11149 | |
| 11150 | /** |
| 11151 | * CSS Borders 4 §5 — resolve `corner-shape` into `[tl, tr, br, bl]` |
| 11152 | * shape names (the 1-4 value shorthand expanded like `border-radius`). |
| 11153 | * `superellipse(<n>)` maps to the nearest implemented keyword by its |
| 11154 | * exponent (large → square, ~1 → round, ~0 → bevel, very negative → |
| 11155 | * notch). Absent / unrecognised → all `round`. |
| 11156 | * |
| 11157 | * @return list<string> [tl, tr, br, bl] |
| 11158 | */ |
| 11159 | private function cornerShapes(Box $box): array |
| 11160 | { |
| 11161 | $value = $box->style->get('corner-shape'); |
| 11162 | if ($value === null) { |
| 11163 | return ['round', 'round', 'round', 'round']; |
| 11164 | } |
| 11165 | $items = $value instanceof \Phpdftk\Css\Value\ValueList ? $value->values : [$value]; |
| 11166 | $shapes = []; |
| 11167 | foreach ($items as $item) { |
| 11168 | $shapes[] = $this->cornerShapeName($item); |
| 11169 | } |
| 11170 | return match (count($shapes)) { |
| 11171 | 0 => ['round', 'round', 'round', 'round'], |
| 11172 | 1 => [$shapes[0], $shapes[0], $shapes[0], $shapes[0]], |
| 11173 | 2 => [$shapes[0], $shapes[1], $shapes[0], $shapes[1]], |
| 11174 | 3 => [$shapes[0], $shapes[1], $shapes[2], $shapes[1]], |
| 11175 | default => [$shapes[0], $shapes[1], $shapes[2], $shapes[3]], |
| 11176 | }; |
| 11177 | } |
| 11178 | |
| 11179 | private function cornerShapeName(\Phpdftk\Css\Value\Value $item): string |
| 11180 | { |
| 11181 | if ($item instanceof Keyword) { |
| 11182 | $name = strtolower($item->name); |
| 11183 | if (in_array($name, ['round', 'bevel', 'square', 'notch', 'scoop', 'squircle'], true)) { |
| 11184 | return $name; |
| 11185 | } |
| 11186 | return 'round'; |
| 11187 | } |
| 11188 | if ($item instanceof \Phpdftk\Css\Value\CssFunction |
| 11189 | && strtolower($item->name) === 'superellipse' |
| 11190 | ) { |
| 11191 | $s = $this->superellipseExponent($item->arguments[0] ?? null); |
| 11192 | return match (true) { |
| 11193 | $s >= 3.0 => 'square', |
| 11194 | $s >= 1.5 => 'squircle', |
| 11195 | $s >= 0.5 => 'round', |
| 11196 | $s >= -0.5 => 'bevel', |
| 11197 | $s >= -1.5 => 'scoop', |
| 11198 | default => 'notch', |
| 11199 | }; |
| 11200 | } |
| 11201 | return 'round'; |
| 11202 | } |
| 11203 | |
| 11204 | private function superellipseExponent(?\Phpdftk\Css\Value\Value $arg): float |
| 11205 | { |
| 11206 | if ($arg instanceof Keyword) { |
| 11207 | $name = strtolower($arg->name); |
| 11208 | if ($name === 'infinity') { |
| 11209 | return INF; |
| 11210 | } |
| 11211 | if ($name === '-infinity') { |
| 11212 | return -INF; |
| 11213 | } |
| 11214 | } |
| 11215 | if ($arg instanceof \Phpdftk\Css\Value\Integer || $arg instanceof \Phpdftk\Css\Value\Number) { |
| 11216 | return (float) $arg->value; |
| 11217 | } |
| 11218 | if ($arg instanceof \Phpdftk\Css\Value\Length) { |
| 11219 | return $arg->value; |
| 11220 | } |
| 11221 | return 1.0; |
| 11222 | } |
| 11223 | |
| 11224 | /** |
| 11225 | * Reduce per-corner border radii from the border box inward to a |
| 11226 | * reference box (CSS Backgrounds 3 §5.3): each corner's rx shrinks by the |
| 11227 | * border (+ padding for content-box) on its horizontal side, ry by the |
| 11228 | * vertical side. `border-box` / `margin-box` pass through unchanged. |
| 11229 | * |
| 11230 | * @param array{array{float,float}, array{float,float}, array{float,float}, array{float,float}} $radii |
| 11231 | * @return array{array{float,float}, array{float,float}, array{float,float}, array{float,float}} |
| 11232 | */ |
| 11233 | private function reduceRadiiToBox(array $radii, string $refBox, BoxGeometry $g): array |
| 11234 | { |
| 11235 | if ($refBox !== 'padding-box' && $refBox !== 'content-box') { |
| 11236 | return $radii; |
| 11237 | } |
| 11238 | $insL = $g->borderLeft; |
| 11239 | $insT = $g->borderTop; |
| 11240 | $insR = $g->borderRight; |
| 11241 | $insB = $g->borderBottom; |
| 11242 | if ($refBox === 'content-box') { |
| 11243 | $insL += $g->paddingLeft; |
| 11244 | $insT += $g->paddingTop; |
| 11245 | $insR += $g->paddingRight; |
| 11246 | $insB += $g->paddingBottom; |
| 11247 | } |
| 11248 | $sub = static fn(float $r, float $i): float => max(0.0, $r - $i); |
| 11249 | return [ |
| 11250 | [$sub($radii[0][0], $insL), $sub($radii[0][1], $insT)], // TL |
| 11251 | [$sub($radii[1][0], $insR), $sub($radii[1][1], $insT)], // TR |
| 11252 | [$sub($radii[2][0], $insR), $sub($radii[2][1], $insB)], // BR |
| 11253 | [$sub($radii[3][0], $insL), $sub($radii[3][1], $insB)], // BL |
| 11254 | ]; |
| 11255 | } |
| 11256 | |
| 11257 | /** |
| 11258 | * A `border-collapse: collapse` table cell whose border must paint in the |
| 11259 | * late (post-content) phase so a descendant cannot overpaint the collapsed |
| 11260 | * table border (CSS Tables 3 §4.3 painting order). |
| 11261 | */ |
| 11262 | private function isCollapsedBorderCell(Box $box): bool |
| 11263 | { |
| 11264 | if (!($box instanceof \Phpdftk\HtmlToPdf\Box\TableCellBox)) { |
| 11265 | return false; |
| 11266 | } |
| 11267 | $bc = $box->style->get('border-collapse'); |
| 11268 | return $bc instanceof \Phpdftk\Css\Value\Keyword |
| 11269 | && strtolower($bc->name) === 'collapse'; |
| 11270 | } |
| 11271 | } |