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LibWeb+LibJS: Make the EventTarget hierarchy (incl. DOM) GC-allocated

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This is a monster patch that turns all EventTargets into GC-allocated
PlatformObjects. Their C++ wrapper classes are removed, and the LibJS
garbage collector is now responsible for their lifetimes.

There's a fair amount of hacks and band-aids in this patch, and we'll
have a lot of cleanup to do after this.
This commit is contained in:
Andreas Kling 2022-08-28 13:42:07 +02:00
parent bb547ce1c4
commit 6f433c8656
445 changed files with 4797 additions and 4268 deletions
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40
Userland/Libraries/LibWeb/DOM/TreeWalker.h
View file

@ -12,61 +12,60 @@ namespace Web::DOM {
// https://dom.spec.whatwg.org/#treewalker
class TreeWalker final : public Bindings::PlatformObject {
JS_OBJECT(TreeWalker, JS::Object);
WEB_PLATFORM_OBJECT(TreeWalker, JS::Object);
public:
static JS::NonnullGCPtr<TreeWalker> create(Node& root, unsigned what_to_show, JS::GCPtr<NodeFilter>);
explicit TreeWalker(Node& root);
virtual ~TreeWalker() override;
TreeWalker& impl() { return *this; }
NonnullRefPtr<Node> current_node() const;
JS::NonnullGCPtr<Node> current_node() const;
void set_current_node(Node&);
JS::ThrowCompletionOr<RefPtr<Node>> parent_node();
JS::ThrowCompletionOr<RefPtr<Node>> first_child();
JS::ThrowCompletionOr<RefPtr<Node>> last_child();
JS::ThrowCompletionOr<RefPtr<Node>> previous_sibling();
JS::ThrowCompletionOr<RefPtr<Node>> next_sibling();
JS::ThrowCompletionOr<RefPtr<Node>> previous_node();
JS::ThrowCompletionOr<RefPtr<Node>> next_node();
JS::ThrowCompletionOr<JS::GCPtr<Node>> parent_node();
JS::ThrowCompletionOr<JS::GCPtr<Node>> first_child();
JS::ThrowCompletionOr<JS::GCPtr<Node>> last_child();
JS::ThrowCompletionOr<JS::GCPtr<Node>> previous_sibling();
JS::ThrowCompletionOr<JS::GCPtr<Node>> next_sibling();
JS::ThrowCompletionOr<JS::GCPtr<Node>> previous_node();
JS::ThrowCompletionOr<JS::GCPtr<Node>> next_node();
NonnullRefPtr<Node> root() { return m_root; }
JS::NonnullGCPtr<Node> root() { return m_root; }
NodeFilter* filter() { return m_filter.ptr(); }
unsigned what_to_show() const { return m_what_to_show; }
private:
explicit TreeWalker(Node& root);
virtual void visit_edges(Cell::Visitor&) override;
enum class ChildTraversalType {
First,
Last,
};
JS::ThrowCompletionOr<RefPtr<Node>> traverse_children(ChildTraversalType);
JS::ThrowCompletionOr<JS::GCPtr<Node>> traverse_children(ChildTraversalType);
enum class SiblingTraversalType {
Next,
Previous,
};
JS::ThrowCompletionOr<RefPtr<Node>> traverse_siblings(SiblingTraversalType);
JS::ThrowCompletionOr<JS::GCPtr<Node>> traverse_siblings(SiblingTraversalType);
JS::ThrowCompletionOr<NodeFilter::Result> filter(Node&);
// https://dom.spec.whatwg.org/#concept-traversal-root
NonnullRefPtr<DOM::Node> m_root;
JS::NonnullGCPtr<Node> m_root;
// https://dom.spec.whatwg.org/#treewalker-current
NonnullRefPtr<DOM::Node> m_current;
JS::NonnullGCPtr<Node> m_current;
// https://dom.spec.whatwg.org/#concept-traversal-whattoshow
unsigned m_what_to_show { 0 };
// https://dom.spec.whatwg.org/#concept-traversal-filter
JS::GCPtr<DOM::NodeFilter> m_filter;
JS::GCPtr<NodeFilter> m_filter;
// https://dom.spec.whatwg.org/#concept-traversal-active
bool m_active { false };
@ -74,7 +73,4 @@ private:
}
namespace Web::Bindings {
inline JS::Object* wrap(JS::Realm&, Web::DOM::TreeWalker& object) { return &object; }
using TreeWalkerWrapper = Web::DOM::TreeWalker;
}
WRAPPER_HACK(TreeWalker, Web::DOM)