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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\Css\Value; |
| 6 | |
| 7 | /** |
| 8 | * `linear-gradient(<angle> | to <side-or-corner>, <stops>)`. The angle is |
| 9 | * stored in degrees normalised to [0, 360). A `to <side>` (e.g. `to right`) |
| 10 | * converts to a fixed equivalent angle, but a `to <corner>` also records |
| 11 | * the {@see GradientCorner}: a corner's angle depends on the gradient box's |
| 12 | * aspect ratio, so it can only be finalised at paint time. `$angleDeg` then |
| 13 | * holds the square-box angle as a fallback. |
| 14 | */ |
| 15 | final readonly class LinearGradient extends Gradient |
| 16 | { |
| 17 | /** @param list<GradientStop> $stops */ |
| 18 | public function __construct( |
| 19 | public float $angleDeg, |
| 20 | public array $stops, |
| 21 | public bool $repeating = false, |
| 22 | public ?ColorSpace $interpolationSpace = null, |
| 23 | public ?HueInterpolation $hueInterpolation = null, |
| 24 | public ?GradientCorner $corner = null, |
| 25 | ) {} |
| 26 | |
| 27 | public function toCss(): string |
| 28 | { |
| 29 | $prefix = $this->repeating ? 'repeating-linear-gradient' : 'linear-gradient'; |
| 30 | $stops = implode(', ', array_map(static fn(GradientStop $s): string => $s->toCss(), $this->stops)); |
| 31 | $angle = (fmod($this->angleDeg, 1.0) === 0.0 ? (int) $this->angleDeg : $this->angleDeg) . 'deg'; |
| 32 | $head = $angle . InterpolationMethodCss::serialise($this->interpolationSpace, $this->hueInterpolation); |
| 33 | return sprintf('%s(%s, %s)', $prefix, $head, $stops); |
| 34 | } |
| 35 | } |