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LibWeb: Make the paint tree a proper standalone tree

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Until now, paint trees have been piggybacking on the layout tree for
traversal, and paintables didn't actually have their own parent/child
pointers.

This patch changes that by making Paintable inherit from TreeNode, and
adding a new pass to LayoutState::commit() where we recursively build
the new paint tree.
This commit is contained in:
Andreas Kling 2023-08-18 12:30:27 +02:00
parent 4d4dbacfc3
commit 216bd513fa
5 changed files with 33 additions and 46 deletions
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32
Userland/Libraries/LibWeb/Painting/Paintable.cpp
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@ -44,38 +44,6 @@ Optional<HitTestResult> Paintable::hit_test(CSSPixelPoint, HitTestType) const
return {};
}
Paintable const* Paintable::first_child() const
{
auto const* layout_child = m_layout_node->first_child();
for (; layout_child && !layout_child->paintable(); layout_child = layout_child->next_sibling())
;
return layout_child ? layout_child->paintable() : nullptr;
}
Paintable const* Paintable::next_sibling() const
{
auto const* layout_node = m_layout_node->next_sibling();
for (; layout_node && !layout_node->paintable(); layout_node = layout_node->next_sibling())
;
return layout_node ? layout_node->paintable() : nullptr;
}
Paintable const* Paintable::last_child() const
{
auto const* layout_child = m_layout_node->last_child();
for (; layout_child && !layout_child->paintable(); layout_child = layout_child->previous_sibling())
;
return layout_child ? layout_child->paintable() : nullptr;
}
Paintable const* Paintable::previous_sibling() const
{
auto const* layout_node = m_layout_node->previous_sibling();
for (; layout_node && !layout_node->paintable(); layout_node = layout_node->previous_sibling())
;
return layout_node ? layout_node->paintable() : nullptr;
}
StackingContext const* Paintable::stacking_context_rooted_here() const
{
if (!layout_node().is_box())