1 /* 2 * Copyright (C) 2013 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 AnimationClock_h 32 #define AnimationClock_h 33 34 #include "wtf/CurrentTime.h" 35 #include "wtf/PassOwnPtr.h" 36 37 namespace WebCore { 38 39 class AnimationClock { 40 public: 41 static PassOwnPtr<AnimationClock> create(WTF::TimeFunction monotonicallyIncreasingTime = WTF::monotonicallyIncreasingTime) 42 { 43 return adoptPtr(new AnimationClock(monotonicallyIncreasingTime)); 44 } 45 46 void updateTime(double time) 47 { 48 if (time > m_time) 49 m_time = time; 50 m_frozen = true; 51 } 52 53 double currentTime() 54 { 55 if (!m_frozen) 56 updateTime(m_monotonicallyIncreasingTime()); 57 return m_time; 58 } 59 60 void unfreeze() { m_frozen = false; } 61 62 void resetTimeForTesting() { m_time = 0; m_frozen = true; } 63 64 private: 65 AnimationClock(WTF::TimeFunction monotonicallyIncreasingTime) 66 : m_monotonicallyIncreasingTime(monotonicallyIncreasingTime) 67 , m_time(0) 68 , m_frozen(false) 69 { 70 } 71 WTF::TimeFunction m_monotonicallyIncreasingTime; 72 double m_time; 73 bool m_frozen; 74 }; 75 76 } // namespace WebCore 77 78 #endif // AnimationClock_h 79
