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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_CUSTOM_CUSTOM_ELEMENT_REACTION_STACK_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_CUSTOM_CUSTOM_ELEMENT_REACTION_STACK_H_
#include "base/macros.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/platform/bindings/name_client.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
namespace blink {
class CustomElementReaction;
class CustomElementReactionQueue;
class Element;
// https://html.spec.whatwg.org/multipage/scripting.html#custom-element-reactions
class CORE_EXPORT CustomElementReactionStack final
: public GarbageCollected<CustomElementReactionStack>,
public NameClient {
public:
CustomElementReactionStack();
void Trace(blink::Visitor*);
const char* NameInHeapSnapshot() const override {
return "CustomElementReactionStack";
}
void Push();
void PopInvokingReactions();
void EnqueueToCurrentQueue(Element*, CustomElementReaction*);
void EnqueueToBackupQueue(Element*, CustomElementReaction*);
void ClearQueue(Element*);
static CustomElementReactionStack& Current();
private:
friend class CustomElementReactionStackTestSupport;
using ElementReactionQueueMap =
HeapHashMap<TraceWrapperMember<Element>,
Member<CustomElementReactionQueue>>;
ElementReactionQueueMap map_;
using ElementQueue = HeapVector<Member<Element>, 1>;
HeapVector<Member<ElementQueue>> stack_;
Member<ElementQueue> backup_queue_;
void InvokeBackupQueue();
void InvokeReactions(ElementQueue&);
void Enqueue(Member<ElementQueue>&, Element*, CustomElementReaction*);
DISALLOW_COPY_AND_ASSIGN(CustomElementReactionStack);
};
class CORE_EXPORT CustomElementReactionStackTestSupport final {
private:
friend class ResetCustomElementReactionStackForTest;
CustomElementReactionStackTestSupport() = delete;
static CustomElementReactionStack* SetCurrentForTest(
CustomElementReactionStack*);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_CUSTOM_CUSTOM_ELEMENT_REACTION_STACK_H_
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