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| 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 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 ScrollbarStateTransitionAnimator_h |
| 32 #define ScrollbarStateTransitionAnimator_h |
| 33 |
| 34 #include "platform/PlatformExport.h" |
| 35 #include "platform/PlatformWheelEvent.h" |
| 36 #include "platform/Timer.h" |
| 37 #include "platform/geometry/FloatPoint.h" |
| 38 #include "platform/geometry/FloatSize.h" |
| 39 #include "platform/scroll/ScrollTypes.h" |
| 40 #include "public/platform/WebThemeEngine.h" |
| 41 #include "wtf/FastAllocBase.h" |
| 42 #include "wtf/Forward.h" |
| 43 #include "wtf/Noncopyable.h" |
| 44 |
| 45 namespace WebCore { |
| 46 class ScrollableArea; |
| 47 class Scrollbar; |
| 48 |
| 49 class PLATFORM_EXPORT ScrollbarStateTransitionAnimator { |
| 50 WTF_MAKE_FAST_ALLOCATED; |
| 51 WTF_MAKE_NONCOPYABLE(ScrollbarStateTransitionAnimator); |
| 52 |
| 53 public: |
| 54 static PassOwnPtr<ScrollbarStateTransitionAnimator> create(ScrollableArea*); |
| 55 |
| 56 explicit ScrollbarStateTransitionAnimator(ScrollableArea*); |
| 57 virtual ~ScrollbarStateTransitionAnimator(); |
| 58 |
| 59 ScrollableArea* scrollableArea() const |
| 60 { |
| 61 return m_scrollableArea; |
| 62 } |
| 63 |
| 64 void cancelAnimations(); |
| 65 void serviceAnimations(); |
| 66 |
| 67 void mouseEnteredScrollbar(Scrollbar*); |
| 68 void mouseExitedScrollbar(Scrollbar*); |
| 69 |
| 70 bool isDuringStateTransitionAnimation() const; |
| 71 |
| 72 struct PLATFORM_EXPORT Parameters { |
| 73 bool m_isEnabled; |
| 74 double m_animationTime; |
| 75 }; |
| 76 |
| 77 double stateTransitionProgress() const |
| 78 { |
| 79 return m_data.m_progress; |
| 80 } |
| 81 blink::WebThemeEngine::State stateTransitionStartState() const |
| 82 { |
| 83 return m_data.m_startState; |
| 84 } |
| 85 blink::WebThemeEngine::State stateTransitionEndState() const |
| 86 { |
| 87 return m_data.m_endState; |
| 88 } |
| 89 |
| 90 protected: |
| 91 void animationWillStart() { } |
| 92 void animationDidFinish() { } |
| 93 |
| 94 void notifyStateTransitionInProgress() const; |
| 95 |
| 96 struct PLATFORM_EXPORT StateTransitionData { |
| 97 StateTransitionData(ScrollbarStateTransitionAnimator* parent); |
| 98 void reset(); |
| 99 void startStateTransitionAnimation(double currentTime, blink::WebThemeEn
gine::State startState, blink::WebThemeEngine::State endState, const Parameters)
; |
| 100 bool animate(double currentTime); |
| 101 bool duringAnimation(double currentTime) const; |
| 102 |
| 103 double m_startTime; |
| 104 double m_animationTime; |
| 105 |
| 106 double m_lastAnimatedTime; |
| 107 |
| 108 double m_progress; // between 0 and 1 |
| 109 blink::WebThemeEngine::State m_startState; |
| 110 blink::WebThemeEngine::State m_endState; |
| 111 }; |
| 112 |
| 113 void startNextTimer(); |
| 114 void animationTimerFired(); |
| 115 |
| 116 void stopAnimationTimerIfNeeded(); |
| 117 bool animationTimerActive(); |
| 118 |
| 119 virtual double currentTime() const; |
| 120 |
| 121 ScrollableArea* m_scrollableArea; |
| 122 |
| 123 Parameters m_parameters; |
| 124 StateTransitionData m_data; |
| 125 |
| 126 bool m_animationActive; |
| 127 }; |
| 128 |
| 129 } // namespace WebCore |
| 130 |
| 131 #endif // ScrollbarStateTransitionAnimator_h |
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