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// Copyright 2014 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 CustomElementMicrotaskDispatcher_h
#define CustomElementMicrotaskDispatcher_h
#include "platform/heap/Handle.h"
#include "wtf/Noncopyable.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/Vector.h"
namespace WebCore {
class CustomElementCallbackQueue;
class CustomElementMicrotaskImportStep;
class CustomElementMicrotaskStep;
class CustomElementMicrotaskStepDispatcher;
class HTMLImportLoader;
class CustomElementMicrotaskDispatcher FINAL : public NoBaseWillBeGarbageCollected<CustomElementMicrotaskDispatcher> {
WTF_MAKE_NONCOPYABLE(CustomElementMicrotaskDispatcher);
DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(CustomElementMicrotaskDispatcher);
public:
static CustomElementMicrotaskDispatcher& instance();
void enqueue(HTMLImportLoader* parentLoader, PassOwnPtrWillBeRawPtr<CustomElementMicrotaskStep>);
void enqueue(HTMLImportLoader* parentLoader, PassOwnPtrWillBeRawPtr<CustomElementMicrotaskImportStep>, bool importIsSync);
void enqueue(CustomElementCallbackQueue*);
void importDidFinish(CustomElementMicrotaskImportStep*);
bool elementQueueIsEmpty() { return m_elements.isEmpty(); }
void trace(Visitor*);
#if !defined(NDEBUG)
void show();
#endif
private:
CustomElementMicrotaskDispatcher();
void ensureMicrotaskScheduledForElementQueue();
void ensureMicrotaskScheduledForMicrotaskSteps();
void ensureMicrotaskScheduled();
static void dispatch();
void doDispatch();
bool m_hasScheduledMicrotask;
enum {
Quiescent,
Resolving,
DispatchingCallbacks
} m_phase;
RefPtrWillBeMember<CustomElementMicrotaskStepDispatcher> m_steps;
WillBeHeapVector<RawPtrWillBeMember<CustomElementCallbackQueue> > m_elements;
};
}
#if !defined(NDEBUG)
void showCEMD();
#endif
#endif // CustomElementMicrotaskDispatcher_h
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