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* Copyright (C) 2019 Apple Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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#include "EventLoop.h"
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#include "GCReachableRef.h"
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#include <wtf/HashSet.h>
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#include <wtf/text/WTFString.h>
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class CustomElementQueue;
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class HTMLSlotElement;
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class MutationObserver;
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// https://html.spec.whatwg.org/multipage/webappapis.html#window-event-loop
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class WindowEventLoop final : public EventLoop {
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static Ref<WindowEventLoop> eventLoopForSecurityOrigin(const SecurityOrigin&);
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virtual ~WindowEventLoop();
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void queueMutationObserverCompoundMicrotask();
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Vector<GCReachableRef<HTMLSlotElement>>& signalSlotList() { return m_signalSlotList; }
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HashSet<RefPtr<MutationObserver>>& activeMutationObservers() { return m_activeObservers; }
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HashSet<RefPtr<MutationObserver>>& suspendedMutationObservers() { return m_suspendedObservers; }
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CustomElementQueue& backupElementQueue();
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static Ref<WindowEventLoop> create(const String&);
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WindowEventLoop(const String&);
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void scheduleToRun() final;
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bool isContextThread() const final;
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MicrotaskQueue& microtaskQueue() final;
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void didReachTimeToRun();
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String m_agentClusterKey;
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std::unique_ptr<MicrotaskQueue> m_microtaskQueue;
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// Each task scheduled in event loop is associated with a document so that it can be suspened or stopped
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// when the associated document is suspened or stopped. This task group is used to schedule a task
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// which is not scheduled to a specific document, and should only be used when it's absolutely required.
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EventLoopTaskGroup m_perpetualTaskGroupForSimilarOriginWindowAgents;
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bool m_mutationObserverCompoundMicrotaskQueuedFlag { false };
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bool m_deliveringMutationRecords { false }; // FIXME: This flag doesn't exist in the spec.
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Vector<GCReachableRef<HTMLSlotElement>> m_signalSlotList; // https://dom.spec.whatwg.org/#signal-slot-list
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HashSet<RefPtr<MutationObserver>> m_activeObservers;
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HashSet<RefPtr<MutationObserver>> m_suspendedObservers;
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std::unique_ptr<CustomElementQueue> m_customElementQueue;
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bool m_processingBackupElementQueue { false };
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} // namespace WebCore