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| ScrollTimeline | |
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| __construct | |
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| toCss | |
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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Phpdftk\Css\Value; |
| 6 | |
| 7 | /** |
| 8 | * CSS Scroll-driven Animations 1 §3.2 — `scroll(<scroller>? |
| 9 | * <axis>?)`. Anonymous scroll-progress timeline tied to a scroll |
| 10 | * container's progress along an axis. |
| 11 | * |
| 12 | * animation-timeline: scroll(); |
| 13 | * animation-timeline: scroll(root); |
| 14 | * animation-timeline: scroll(nearest block); |
| 15 | * animation-timeline: scroll(self inline); |
| 16 | * |
| 17 | * Scroller is one of `nearest | root | self` (or omitted = nearest); |
| 18 | * axis is `block | inline | x | y` (or omitted = block). |
| 19 | */ |
| 20 | final readonly class ScrollTimeline extends Value |
| 21 | { |
| 22 | public function __construct( |
| 23 | public ?string $scroller = null, |
| 24 | public ?string $axis = null, |
| 25 | ) {} |
| 26 | |
| 27 | public function toCss(): string |
| 28 | { |
| 29 | $parts = []; |
| 30 | if ($this->scroller !== null) { |
| 31 | $parts[] = $this->scroller; |
| 32 | } |
| 33 | if ($this->axis !== null) { |
| 34 | $parts[] = $this->axis; |
| 35 | } |
| 36 | return $parts === [] |
| 37 | ? 'scroll()' |
| 38 | : 'scroll(' . implode(' ', $parts) . ')'; |
| 39 | } |
| 40 | } |