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LibWeb: Implement plumbing for view transitions

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This implements large parts of the CSS view-transitions-1 spec.
This commit is contained in:
Psychpsyo
2025-03-23 12:38:21 +01:00
committed by Sam Atkins
parent 4f0e8236a0
commit 56739b4b16
Notes: github-actions[bot] 2025-09-07 12:59:13 +00:00 
Author: https://github.com/Psychpsyo
Commit: https://github.com/LadybirdBrowser/ladybird/commit/56739b4b162
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5155
Reviewed-by: https://github.com/AtkinsSJ ✅
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/gmta
Reviewed-by: https://github.com/kalenikaliaksandr ✅
22 changed files with 1516 additions and 4 deletions
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39
Tests/LibWeb/Ref/input/wpt-import/css/css-view-transitions/update-callback-called-once.html Normal file
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<!DOCTYPE html>
<html class="reftest-wait">
<title>Update callback should only be called once</title>
<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/#call-dom-update-callback-algorithm">
<link rel="match" href="../../../../expected/wpt-import/css/reference/ref-filled-green-100px-square.xht">
<meta name="fuzzy" content="maxDifference=0-1; totalPixels=0-500">
<style>
#target {
width: 100px;
height: 100px;
background-color: red;
}
::view-transition-group(*),
::view-transition-image-pair(*),
::view-transition-old(*),
::view-transition-new(*) {
animation-play-state: paused;
}
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="target"></div>
<script>
addEventListener("load", () => {
let updateCallbackCalled = false;
document.startViewTransition(function() {
target.style.backgroundColor = updateCallbackCalled ? "red" : "green";
updateCallbackCalled = true;
document.startViewTransition(() => {});
requestAnimationFrame(() => {
requestAnimationFrame(() => {
document.documentElement.classList.remove("reftest-wait");
});
});
});
});
</script>
</html>