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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 CustomElementReactionStack_h
#define CustomElementReactionStack_h
#include "bindings/core/v8/ScriptWrappable.h"
#include "core/CoreExport.h"
#include "platform/heap/Handle.h"
#include "wtf/Noncopyable.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 TraceWrapperBase {
WTF_MAKE_NONCOPYABLE(CustomElementReactionStack);
public:
CustomElementReactionStack();
DECLARE_TRACE();
DECLARE_VIRTUAL_TRACE_WRAPPERS();
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 m_map;
using ElementQueue = HeapVector<Member<Element>, 1>;
HeapVector<Member<ElementQueue>> m_stack;
Member<ElementQueue> m_backupQueue;
void invokeBackupQueue();
void invokeReactions(ElementQueue&);
void enqueue(Member<ElementQueue>&, Element*, CustomElementReaction*);
};
class CORE_EXPORT CustomElementReactionStackTestSupport final {
private:
friend class ResetCustomElementReactionStackForTest;
CustomElementReactionStackTestSupport() = delete;
static CustomElementReactionStack* setCurrentForTest(
CustomElementReactionStack*);
};
} // namespace blink
#endif // CustomElementReactionStack_h
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