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