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LibWeb: Invalidate layout tree at nearest non-anonymous ancestor

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When marking a part of the layout tree for rebuild, if the subtree root
that we're marking has an anonymous parent, we now mark from the nearest
non-anonymous ancestor instead.

This ensures that subtrees inside anonymous wrappers don't just get
duplicated (i.e recreated but inserted instead of replaced).
This commit is contained in:
Andreas Kling 2025-06-03 16:56:15 +02:00 • committed by Andreas Kling
commit 6dba720370
Notes: github-actions[bot] 2025-06-03 22:44:28 +00:00
3 changed files with 52 additions and 1 deletions
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14
Tests/LibWeb/Layout/input/layout-tree-update/inline-element-position-change.html Normal file
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@ -0,0 +1,14 @@
<!doctype html>
<script>
function flipFlop() {
foo.style.position = 'relative';
foo.offsetWidth;
foo.style.position = '';
foo.offsetWidth;
}
onload = function() {
flipFlop();
flipFlop();
flipFlop();
};
</script><body><a><span id="foo"></span><h1>test</h1>