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LibWeb: Use offset of nearest scrollable ancestor for positioned boxes
Because positioned descendants are painted out-of-order we need to separately apply offset of nearest scrollable box for them. Fixes https://github.com/SerenityOS/serenity/issues/20554
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5 changed files with 167 additions and 0 deletions
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@ -850,4 +850,15 @@ Optional<HitTestResult> PaintableWithLines::hit_test(CSSPixelPoint position, Hit
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return {};
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}
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PaintableBox const* PaintableBox::nearest_scrollable_ancestor() const
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{
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auto* ancestor = parent();
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while (ancestor) {
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if (ancestor->is_paintable_box() && static_cast<PaintableBox const*>(ancestor)->has_scrollable_overflow())
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return static_cast<PaintableBox const*>(ancestor);
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ancestor = ancestor->parent();
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}
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return nullptr;
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}
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}
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