6f433c8656
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.
76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
/*
|
|
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <LibWeb/DOM/NodeFilter.h>
|
|
|
|
namespace Web::DOM {
|
|
|
|
// https://dom.spec.whatwg.org/#treewalker
|
|
class TreeWalker final : public Bindings::PlatformObject {
|
|
WEB_PLATFORM_OBJECT(TreeWalker, JS::Object);
|
|
|
|
public:
|
|
static JS::NonnullGCPtr<TreeWalker> create(Node& root, unsigned what_to_show, JS::GCPtr<NodeFilter>);
|
|
|
|
virtual ~TreeWalker() override;
|
|
|
|
JS::NonnullGCPtr<Node> current_node() const;
|
|
void set_current_node(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();
|
|
|
|
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<JS::GCPtr<Node>> traverse_children(ChildTraversalType);
|
|
|
|
enum class SiblingTraversalType {
|
|
Next,
|
|
Previous,
|
|
};
|
|
JS::ThrowCompletionOr<JS::GCPtr<Node>> traverse_siblings(SiblingTraversalType);
|
|
|
|
JS::ThrowCompletionOr<NodeFilter::Result> filter(Node&);
|
|
|
|
// https://dom.spec.whatwg.org/#concept-traversal-root
|
|
JS::NonnullGCPtr<Node> m_root;
|
|
|
|
// https://dom.spec.whatwg.org/#treewalker-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<NodeFilter> m_filter;
|
|
|
|
// https://dom.spec.whatwg.org/#concept-traversal-active
|
|
bool m_active { false };
|
|
};
|
|
|
|
}
|
|
|
|
WRAPPER_HACK(TreeWalker, Web::DOM)
|