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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\Svg; |
| 6 | |
| 7 | /** |
| 8 | * SVG 2 §13.3 — `<pattern>` element. Defines a tile that paints |
| 9 | * into the fill or stroke of any shape that references it via |
| 10 | * `fill="url(#patternId)"`. Pattern attributes mirror `<marker>` |
| 11 | * and `<use>`: |
| 12 | * |
| 13 | * - x, y, width, height — the tile rectangle in user space |
| 14 | * (or pattern units, depending on patternUnits). |
| 15 | * - patternUnits — `objectBoundingBox` (default, %-relative |
| 16 | * to the referencing shape's bbox) or `userSpaceOnUse`. |
| 17 | * - patternContentUnits — same flag for child positioning, |
| 18 | * defaults to `userSpaceOnUse`. |
| 19 | * - viewBox + preserveAspectRatio for content scaling. |
| 20 | * - patternTransform — additional transform on the tile. |
| 21 | * |
| 22 | * For the static print renderer the typed class lifts these |
| 23 | * attributes off the generic Element surface; PDF Tiling Pattern |
| 24 | * (Pattern Type 1) emission is the next deliverable. |
| 25 | */ |
| 26 | final class Pattern extends Element |
| 27 | { |
| 28 | public function __construct() |
| 29 | { |
| 30 | parent::__construct('pattern'); |
| 31 | } |
| 32 | |
| 33 | public function x(): float |
| 34 | { |
| 35 | return (float) ($this->getAttribute('x') ?? 0); |
| 36 | } |
| 37 | |
| 38 | public function y(): float |
| 39 | { |
| 40 | return (float) ($this->getAttribute('y') ?? 0); |
| 41 | } |
| 42 | |
| 43 | public function width(): float |
| 44 | { |
| 45 | return (float) ($this->getAttribute('width') ?? 0); |
| 46 | } |
| 47 | |
| 48 | public function height(): float |
| 49 | { |
| 50 | return (float) ($this->getAttribute('height') ?? 0); |
| 51 | } |
| 52 | |
| 53 | public function patternUnits(): string |
| 54 | { |
| 55 | $u = strtolower($this->getAttribute('patternUnits') ?? 'objectboundingbox'); |
| 56 | return $u === 'userspaceonuse' ? 'userSpaceOnUse' : 'objectBoundingBox'; |
| 57 | } |
| 58 | |
| 59 | public function patternContentUnits(): string |
| 60 | { |
| 61 | $u = strtolower($this->getAttribute('patternContentUnits') ?? 'userspaceonuse'); |
| 62 | return $u === 'objectboundingbox' ? 'objectBoundingBox' : 'userSpaceOnUse'; |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * @return array{0: float, 1: float, 2: float, 3: float}|null |
| 67 | */ |
| 68 | public function viewBox(): ?array |
| 69 | { |
| 70 | $vb = $this->getAttribute('viewBox'); |
| 71 | if ($vb === null) { |
| 72 | return null; |
| 73 | } |
| 74 | $parts = preg_split('/[\s,]+/', trim($vb)) ?: []; |
| 75 | if (count($parts) !== 4) { |
| 76 | return null; |
| 77 | } |
| 78 | return [ |
| 79 | (float) $parts[0], |
| 80 | (float) $parts[1], |
| 81 | (float) $parts[2], |
| 82 | (float) $parts[3], |
| 83 | ]; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * `href` (or legacy `xlink:href`) — when present, the |
| 88 | * referenced pattern's attributes inherit into this one. |
| 89 | * See SVG 2 §13.3 chain-resolution rules. |
| 90 | */ |
| 91 | public function href(): ?string |
| 92 | { |
| 93 | return $this->getAttribute('href') |
| 94 | ?? $this->getAttribute('xlink:href'); |
| 95 | } |
| 96 | } |