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LibWeb: Use the StackingContext tree for hit testing

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This makes it possible to click links that are above other content due
to stacking context order (e.g via CSS z-index.)
This commit is contained in:
Andreas Kling 2020-07-01 19:02:28 +02:00
parent f7a900367f
commit 392b055806
8 changed files with 36 additions and 1 deletions
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19
Libraries/LibWeb/Painting/StackingContext.cpp
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@ -61,6 +61,25 @@ void StackingContext::paint(PaintContext& context, LayoutNode::PaintPhase phase)
}
}
HitTestResult StackingContext::hit_test(const Gfx::IntPoint& position) const
{
HitTestResult result;
if (!m_box.is_root()) {
result = m_box.hit_test(position);
} else {
// NOTE: LayoutDocument::hit_test() merely calls StackingContext::hit_test()
// so we call its base class instead.
result = to<LayoutDocument>(m_box).LayoutBlock::hit_test(position);
}
for (auto* child : m_children) {
auto result_here = child->hit_test(position);
if (result_here.layout_node)
result = result_here;
}
return result;
}
void StackingContext::dump(int indent) const
{
for (int i = 0; i < indent; ++i)