mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-21 02:08:12 +03:00
2692db8699
Note that as of this commit, there aren't any such throwers, and the call site in Heap::allocate will drop exceptions on the floor. This commit only serves to change the declaration of the overrides, make sure they return an empty value, and to propagate OOM errors frm their base initialize invocations.
83 lines
2.4 KiB
C++
83 lines
2.4 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 <LibJS/Runtime/Object.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 final : public Bindings::PlatformObject {
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WEB_PLATFORM_OBJECT(NodeIterator, Bindings::PlatformObject);
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public:
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static JS::NonnullGCPtr<NodeIterator> create(Node& root, unsigned what_to_show, JS::GCPtr<NodeFilter>);
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virtual ~NodeIterator() override;
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JS::NonnullGCPtr<Node> root() { return m_root; }
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JS::NonnullGCPtr<Node> reference_node() { return m_reference.node; }
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bool pointer_before_reference_node() const { return m_reference.is_before_node; }
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unsigned what_to_show() const { return m_what_to_show; }
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NodeFilter* filter() { return m_filter.ptr(); }
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JS::ThrowCompletionOr<JS::GCPtr<Node>> next_node();
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JS::ThrowCompletionOr<JS::GCPtr<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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explicit NodeIterator(Node& root);
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virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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virtual void finalize() override;
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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<JS::GCPtr<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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JS::NonnullGCPtr<Node> m_root;
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struct NodePointer {
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JS::NonnullGCPtr<Node> node;
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// https://dom.spec.whatwg.org/#nodeiterator-pointer-before-reference
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bool is_before_node { true };
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};
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void run_pre_removing_steps_with_node_pointer(Node&, NodePointer&);
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// https://dom.spec.whatwg.org/#nodeiterator-reference
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NodePointer m_reference;
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// While traversal is ongoing, we keep track of the current node pointer.
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// This allows us to adjust it during traversal if calling the filter ends up removing the node from the DOM.
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Optional<NodePointer> m_traversal_pointer;
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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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JS::GCPtr<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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