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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\Svg\Gradient; |
| 6 | |
| 7 | use Phpdftk\Color\ColorInterface; |
| 8 | use Phpdftk\Svg\Element; |
| 9 | use Phpdftk\Svg\Value\Color; |
| 10 | |
| 11 | /** |
| 12 | * SVG `<stop>` per SVG 2 ยง13.2.3 โ one colour stop inside a gradient. |
| 13 | * |
| 14 | * `offset()` is clamped to `[0, 1]` (numeric in that range or a percentage |
| 15 | * in `0%`โ`100%`). Out-of-range values clamp per spec. |
| 16 | * |
| 17 | * `stopColor()` returns the parsed colour or null. The `currentColor` |
| 18 | * keyword resolves to null here โ the painter checks the raw attribute |
| 19 | * separately when it needs that distinction. |
| 20 | */ |
| 21 | final class Stop extends Element |
| 22 | { |
| 23 | public function __construct() |
| 24 | { |
| 25 | parent::__construct('stop'); |
| 26 | } |
| 27 | |
| 28 | public function offset(): float |
| 29 | { |
| 30 | $raw = $this->getAttribute('offset'); |
| 31 | if ($raw === null) { |
| 32 | return 0.0; |
| 33 | } |
| 34 | $value = trim($raw); |
| 35 | if (str_ends_with($value, '%')) { |
| 36 | $n = substr($value, 0, -1); |
| 37 | if (!is_numeric($n)) { |
| 38 | return 0.0; |
| 39 | } |
| 40 | return max(0.0, min(1.0, ((float) $n) / 100.0)); |
| 41 | } |
| 42 | if (!is_numeric($value)) { |
| 43 | return 0.0; |
| 44 | } |
| 45 | return max(0.0, min(1.0, (float) $value)); |
| 46 | } |
| 47 | |
| 48 | public function stopColor(): ?ColorInterface |
| 49 | { |
| 50 | $raw = $this->getAttribute('stop-color'); |
| 51 | if ($raw === null) { |
| 52 | return null; |
| 53 | } |
| 54 | return Color::parse($raw); |
| 55 | } |
| 56 | |
| 57 | public function stopOpacity(): ?float |
| 58 | { |
| 59 | $raw = $this->getAttribute('stop-opacity'); |
| 60 | if ($raw === null) { |
| 61 | return null; |
| 62 | } |
| 63 | if (!is_numeric(trim($raw))) { |
| 64 | return null; |
| 65 | } |
| 66 | return max(0.0, min(1.0, (float) $raw)); |
| 67 | } |
| 68 | } |