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LibWeb: Do paint-order traversal in Document::elements_from_point()

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Elements are now collected according to paint order as spec says,
replacing the depth-first traversal of the paint tree with hit-testing
on each box.

This change resolves a FIXME in an existing test and adds a new
previously non-working test.
This commit is contained in:
Aliaksandr Kalenik 2024-02-13 21:34:46 +01:00 • committed by Andreas Kling
parent 9c99182b1e
commit 9d2809146f
7 changed files with 68 additions and 20 deletions
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8
Tests/LibWeb/Text/input/DOM/Elements-from-point.html
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@ -32,15 +32,9 @@
for (let elem of document.elementsFromPoint(500, 10)) {
printElement(elem);
}
println("== FIXME: Elements at (550, 60) ==")
println("== Elements at (550, 60) ==")
for (let elem of document.elementsFromPoint(550, 60)) {
printElement(elem);
}
// FIXME: 550, 60 is supposed to print the following, but the algorithm is wrong.
// <DIV id="small-box" >
// <DIV id="large-box" >
// <PRE id="out" >
// <BODY >
// <HTML >
});
</script>