9c6999ecf2
These steps run when a node is about to be removed from its parent, and adjust the position of any live NodeIterators so that they don't point at a now-removed node. Note that while this commit implements what's in the DOM specification, the specification doesn't fully match what other browsers do. Spec bug: https://github.com/whatwg/dom/issues/907
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
/*
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/RefCounted.h>
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#include <LibWeb/Bindings/Wrappable.h>
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#include <LibWeb/DOM/NodeFilter.h>
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namespace Web::DOM {
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// https://dom.spec.whatwg.org/#nodeiterator
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class NodeIterator
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: public RefCounted<NodeIterator>
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, public Bindings::Wrappable {
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public:
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using WrapperType = Bindings::NodeIteratorWrapper;
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virtual ~NodeIterator() override;
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static NonnullRefPtr<NodeIterator> create(Node& root, unsigned what_to_show, RefPtr<NodeFilter>);
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NonnullRefPtr<Node> root() { return m_root; }
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NonnullRefPtr<Node> reference_node() { return m_reference; }
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bool pointer_before_reference_node() const { return m_pointer_before_reference; }
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unsigned what_to_show() const { return m_what_to_show; }
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NodeFilter* filter() { return m_filter; }
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JS::ThrowCompletionOr<RefPtr<Node>> next_node();
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JS::ThrowCompletionOr<RefPtr<Node>> previous_node();
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void detach();
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void run_pre_removing_steps(Node&);
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private:
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NodeIterator(Node& root);
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enum class Direction {
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Next,
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Previous,
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};
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JS::ThrowCompletionOr<RefPtr<Node>> traverse(Direction);
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JS::ThrowCompletionOr<NodeFilter::Result> filter(Node&);
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// https://dom.spec.whatwg.org/#concept-traversal-root
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NonnullRefPtr<DOM::Node> m_root;
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// https://dom.spec.whatwg.org/#nodeiterator-reference
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NonnullRefPtr<DOM::Node> m_reference;
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// https://dom.spec.whatwg.org/#nodeiterator-pointer-before-reference
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bool m_pointer_before_reference { true };
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// https://dom.spec.whatwg.org/#concept-traversal-whattoshow
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unsigned m_what_to_show { 0 };
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// https://dom.spec.whatwg.org/#concept-traversal-filter
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RefPtr<DOM::NodeFilter> m_filter;
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// https://dom.spec.whatwg.org/#concept-traversal-active
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bool m_active { false };
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};
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}
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