1/* 2 * Copyright (C) 2010 Google Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 */ 26 27#ifndef DocumentEventQueue_h 28#define DocumentEventQueue_h 29 30#include "core/dom/EventQueue.h" 31#include "wtf/Forward.h" 32#include "wtf/HashSet.h" 33#include "wtf/ListHashSet.h" 34#include "wtf/OwnPtr.h" 35#include "wtf/RefCounted.h" 36 37namespace WebCore { 38 39class Event; 40class DocumentEventQueueTimer; 41class Node; 42class ScriptExecutionContext; 43 44class DocumentEventQueue : public RefCounted<DocumentEventQueue>, public EventQueue { 45public: 46 enum ScrollEventTargetType { 47 ScrollEventDocumentTarget, 48 ScrollEventElementTarget 49 }; 50 51 static PassRefPtr<DocumentEventQueue> create(ScriptExecutionContext*); 52 virtual ~DocumentEventQueue(); 53 54 // EventQueue 55 virtual bool enqueueEvent(PassRefPtr<Event>) OVERRIDE; 56 virtual bool cancelEvent(Event*) OVERRIDE; 57 virtual void close() OVERRIDE; 58 59 void enqueueOrDispatchScrollEvent(PassRefPtr<Node>, ScrollEventTargetType); 60 61private: 62 explicit DocumentEventQueue(ScriptExecutionContext*); 63 64 void pendingEventTimerFired(); 65 void dispatchEvent(PassRefPtr<Event>); 66 67 OwnPtr<DocumentEventQueueTimer> m_pendingEventTimer; 68 ListHashSet<RefPtr<Event>, 16> m_queuedEvents; 69 HashSet<Node*> m_nodesWithQueuedScrollEvents; 70 bool m_isClosed; 71 72 friend class DocumentEventQueueTimer; 73}; 74 75} 76 77#endif // DocumentEventQueue_h 78