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LibWeb: Don't hit test anonymous containers if there are no fragments

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We were always delegating hit tests to PaintableBox if a
PaintableWithLines has no fragments, which means that anonymous
containers could overlap with previous siblings and prioritize their
border box rect. Instead, the nearest non-anonymous ancestor should take
care of hit testing the children so the correct order is maintained.

To achieve this, we no longer do an early hit test in
PaintableWithLines::hit_test() if there are no fragments and default
to the later PaintableBox::hit_test() call that does take anonymous
containers into account.

Fixes the issue seen in #4864.
This commit is contained in:
Jelle Raaijmakers 2025-07-04 14:57:30 +02:00 • committed by Tim Ledbetter
commit 2cc8f0821c
Notes: github-actions[bot] 2025-07-05 22:57:45 +00:00
3 changed files with 24 additions and 2 deletions
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19
Tests/LibWeb/Text/input/hit_testing/empty-anonymous-container-overlapping.html Normal file
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@ -0,0 +1,19 @@
<!DOCTYPE html>
<style>
#a {
margin-bottom: -20px;
}
body {
border: 1px solid blue;
}
</style>
<script src="../include.js"></script>
<div id="a"><a href="#" id="target">You should be able to click this link</a></div><br>
<script>
test(() => {
const hit = internals.hitTest(50, 18);
printElement(hit.node);
println(`index: ${hit.indexInNode}`);
printElement(hit.node.parentNode);
});
</script>