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LibWeb: Make painting order more spec-compliant

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Now our painting order inside stacking contexts is closer to the
algorithm specified by CSS 2.1 (see section 9.9 and Appendix E)
This commit is contained in:
Egor Ananyin 2021-05-07 19:03:25 +03:00 • committed by Andreas Kling
parent 33af7075e7
commit d2b6148787
8 changed files with 89 additions and 43 deletions
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12
Userland/Libraries/LibWeb/Layout/Node.cpp
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@ -67,6 +67,18 @@ const BlockBox* Node::containing_block() const
return nearest_block_ancestor();
}
bool Node::establishes_stacking_context() const
{
if (!has_style())
return false;
if (dom_node() == document().root())
return true;
auto position = computed_values().position();
if (position == CSS::Position::Absolute || position == CSS::Position::Relative || position == CSS::Position::Fixed || position == CSS::Position::Sticky)
return true;
return false;
}
void Node::paint(PaintContext& context, PaintPhase phase)
{
if (!is_visible())