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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef ScopedEventQueue_h 32 #define ScopedEventQueue_h 33 34 #include "wtf/Noncopyable.h" 35 #include "wtf/PassRefPtr.h" 36 #include "wtf/RefPtr.h" 37 #include "wtf/Vector.h" 38 39 namespace WebCore { 40 41 class EventDispatchMediator; 42 43 class ScopedEventQueue { 44 WTF_MAKE_NONCOPYABLE(ScopedEventQueue); WTF_MAKE_FAST_ALLOCATED; 45 public: 46 ~ScopedEventQueue(); 47 48 void enqueueEventDispatchMediator(PassRefPtr<EventDispatchMediator>); 49 void dispatchAllEvents(); 50 static ScopedEventQueue* instance(); 51 52 void incrementScopingLevel(); 53 void decrementScopingLevel(); 54 55 private: 56 ScopedEventQueue(); 57 static void initialize(); 58 void dispatchEvent(PassRefPtr<EventDispatchMediator>) const; 59 60 Vector<RefPtr<EventDispatchMediator> > m_queuedEventDispatchMediators; 61 unsigned m_scopingLevel; 62 63 static ScopedEventQueue* s_instance; 64 }; 65 66 class EventQueueScope { 67 WTF_MAKE_NONCOPYABLE(EventQueueScope); 68 69 public: 70 EventQueueScope() { ScopedEventQueue::instance()->incrementScopingLevel(); } 71 ~EventQueueScope() { ScopedEventQueue::instance()->decrementScopingLevel(); } 72 }; 73 74 } 75 76 #endif // ScopedEventQueue_h 77
