1 /* 2 * Copyright (C) 2012 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef WebActiveGestureAnimation_h 27 #define WebActiveGestureAnimation_h 28 29 #include "wtf/Noncopyable.h" 30 #include "wtf/OwnPtr.h" 31 #include "wtf/PassOwnPtr.h" 32 33 namespace WebKit { 34 35 class WebGestureCurve; 36 class WebGestureCurveTarget; 37 38 // Implements a gesture animation (fling scroll, etc.) using a curve with a generic interface 39 // to define the animation parameters as a function of time, and applies the animation 40 // to a target, again via a generic interface. It is assumed that animate() is called 41 // on a more-or-less regular basis by the owner. 42 class WebActiveGestureAnimation { 43 WTF_MAKE_NONCOPYABLE(WebActiveGestureAnimation); 44 public: 45 static PassOwnPtr<WebActiveGestureAnimation> createAtAnimationStart(PassOwnPtr<WebGestureCurve>, WebGestureCurveTarget*); 46 static PassOwnPtr<WebActiveGestureAnimation> createWithTimeOffset(PassOwnPtr<WebGestureCurve>, WebGestureCurveTarget*, double startTime); 47 ~WebActiveGestureAnimation(); 48 49 bool animate(double time); 50 51 private: 52 // Assumes a valid WebGestureCurveTarget that outlives the animation. 53 WebActiveGestureAnimation(PassOwnPtr<WebGestureCurve>, WebGestureCurveTarget*, double startTime, bool waitingForFirstTick); 54 55 double m_startTime; 56 bool m_waitingForFirstTick; 57 OwnPtr<WebGestureCurve> m_curve; 58 WebGestureCurveTarget* m_target; 59 }; 60 61 } // namespace WebKit 62 63 #endif 64
