/* * Copyright (C) 2012 Victor Carbune (victor@rosedu.org) * * 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. ``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 * 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 "ActiveDOMObject.h" #include "GenericTaskQueue.h" #include <wtf/Deque.h> #include <wtf/Forward.h> #include <wtf/RefPtr.h> #include <wtf/UniqueRef.h> namespace WebCore { class Event; class EventTarget; class Timer; class ScriptExecutionContext; // All instances of MainThreadGenericEventQueue use a shared Timer for dispatching events. // FIXME: We should port call sites to the HTML event loop and remove this class. class MainThreadGenericEventQueue : public ActiveDOMObject { WTF_MAKE_FAST_ALLOCATED; public: static UniqueRef<MainThreadGenericEventQueue> create(EventTarget&); void enqueueEvent(RefPtr<Event>&&); void close(); void cancelAllEvents(); bool hasPendingEventsOfType(const AtomString&) const; void setPaused(bool); bool isSuspended() const { return m_isSuspended; } bool hasPendingActivity() const; private: friend UniqueRef<MainThreadGenericEventQueue> WTF::makeUniqueRefWithoutFastMallocCheck<MainThreadGenericEventQueue, WebCore::EventTarget&>(WebCore::EventTarget&); explicit MainThreadGenericEventQueue(EventTarget&); void dispatchOneEvent(); const char* activeDOMObjectName() const final; void stop() final; void suspend(ReasonForSuspension) final; void resume() final; void rescheduleAllEventsIfNeeded(); bool isSuspendedOrPausedByClient() const { return m_isSuspended || m_isPausedByClient; } EventTarget& m_owner; UniqueRef<GenericTaskQueue<Timer>> m_taskQueue; Deque<RefPtr<Event>> m_pendingEvents; bool m_isClosed { false }; bool m_isPausedByClient { false }; bool m_isSuspended { false }; bool m_isFiringEvent { false }; }; } // namespace WebCore