1 /* 2 * Copyright (C) 2011 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 INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 * 24 */ 25 26 #ifndef ScriptedAnimationController_h 27 #define ScriptedAnimationController_h 28 29 #include "wtf/ListHashSet.h" 30 #include "wtf/RefCounted.h" 31 #include "wtf/RefPtr.h" 32 #include "wtf/Vector.h" 33 #include "wtf/text/StringImpl.h" 34 35 namespace WebCore { 36 37 class Document; 38 class Event; 39 class EventTarget; 40 class RequestAnimationFrameCallback; 41 42 class ScriptedAnimationController : public RefCounted<ScriptedAnimationController> { 43 public: create(Document * document)44 static PassRefPtr<ScriptedAnimationController> create(Document* document) 45 { 46 return adoptRef(new ScriptedAnimationController(document)); 47 } 48 ~ScriptedAnimationController(); clearDocumentPointer()49 void clearDocumentPointer() { m_document = 0; } 50 51 typedef int CallbackId; 52 53 int registerCallback(PassOwnPtr<RequestAnimationFrameCallback>); 54 void cancelCallback(CallbackId); 55 void serviceScriptedAnimations(double monotonicTimeNow); 56 57 void enqueueEvent(PassRefPtr<Event>); 58 void enqueuePerFrameEvent(PassRefPtr<Event>); 59 60 void suspend(); 61 void resume(); 62 63 private: 64 explicit ScriptedAnimationController(Document*); 65 66 void scheduleAnimationIfNeeded(); 67 68 void dispatchEvents(); 69 void executeCallbacks(double monotonicTimeNow); 70 71 typedef Vector<OwnPtr<RequestAnimationFrameCallback> > CallbackList; 72 CallbackList m_callbacks; 73 CallbackList m_callbacksToInvoke; // only non-empty while inside executeCallbacks 74 75 Document* m_document; 76 CallbackId m_nextCallbackId; 77 int m_suspendCount; 78 Vector<RefPtr<Event> > m_eventQueue; 79 ListHashSet<std::pair<const EventTarget*, const StringImpl*> > m_perFrameEvents; 80 }; 81 82 } 83 84 #endif // ScriptedAnimationController_h 85