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LibWeb: Make the layout tree GC-allocated

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This removes a set of complex reference cycles between DOM, layout tree
and browsing context.

It also makes lifetimes much easier to reason about, as the DOM and
layout trees are now free to keep each other alive.
This commit is contained in:
Andreas Kling 2022-10-17 14:41:50 +02:00
parent 83c5ff57d8
commit 268b9c5d90
72 changed files with 258 additions and 207 deletions
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5
Userland/Libraries/LibWeb/DOM/Node.h
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@ -156,7 +156,8 @@ public:
Painting::PaintableBox const* paint_box() const;
Painting::Paintable const* paintable() const;
void set_layout_node(Badge<Layout::Node>, Layout::Node*) const;
void set_layout_node(Badge<Layout::Node>, JS::NonnullGCPtr<Layout::Node>);
void detach_layout_node(Badge<DOM::Document>);
virtual bool is_child_allowed(Node const&) const { return true; }
@ -623,7 +624,7 @@ protected:
virtual void visit_edges(Cell::Visitor&) override;
JS::GCPtr<Document> m_document;
mutable WeakPtr<Layout::Node> m_layout_node;
JS::GCPtr<Layout::Node> m_layout_node;
NodeType m_type { NodeType::INVALID };
bool m_needs_style_update { false };
bool m_child_needs_style_update { false };