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LibWeb: Account for scroll offset in hit-testing

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The hit-testing position is now shifted by the scroll offsets before
performing any checks for containment. This is implemented by assigning
each PaintableBox/InlinePaintable an offset corresponding to the scroll
frame in which it is contained. The non-scroll-adjusted position is
still passed down when recursing to children because the assigned
offset accumulated for nested scroll frames.

With this change, hit testing works in the Inspector.
Fixes https://github.com/SerenityOS/serenity/issues/22068
This commit is contained in:
Aliaksandr Kalenik 2024-01-29 06:28:17 +01:00 • committed by Andreas Kling
parent beb1c85b6b
commit 556679fedd
7 changed files with 81 additions and 10 deletions
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Tests/LibWeb/Text/expected/hit_testing/overflow-scroll.txt Normal file
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@ -0,0 +1,2 @@
Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Line 7 Line 8 Line 9 Line 10 Line 11 Line 12 Line 13 Line 14 Line 15 Line 16 Line 17 Line 18 Line 19 Line 20 <P id="line-6" >
<SPAN id="line-8" >