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| 1 /* | 1 /* |
| 2 * Copyright (C) 2011 Apple Inc. All rights reserved. | 2 * Copyright (C) 2011 Apple Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
| 8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
| 10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
| (...skipping 16 matching lines...) Expand all Loading... |
| 27 #define ScrollElasticityController_h | 27 #define ScrollElasticityController_h |
| 28 | 28 |
| 29 #if USE(RUBBER_BANDING) | 29 #if USE(RUBBER_BANDING) |
| 30 | 30 |
| 31 #include "platform/PlatformExport.h" | 31 #include "platform/PlatformExport.h" |
| 32 #include "platform/geometry/FloatPoint.h" | 32 #include "platform/geometry/FloatPoint.h" |
| 33 #include "platform/geometry/FloatSize.h" | 33 #include "platform/geometry/FloatSize.h" |
| 34 #include "platform/scroll/ScrollTypes.h" | 34 #include "platform/scroll/ScrollTypes.h" |
| 35 #include "wtf/Noncopyable.h" | 35 #include "wtf/Noncopyable.h" |
| 36 | 36 |
| 37 namespace WebCore { | 37 namespace blink { |
| 38 | 38 |
| 39 class PlatformWheelEvent; | 39 class PlatformWheelEvent; |
| 40 | 40 |
| 41 class ScrollElasticityControllerClient { | 41 class ScrollElasticityControllerClient { |
| 42 protected: | 42 protected: |
| 43 virtual ~ScrollElasticityControllerClient() { } | 43 virtual ~ScrollElasticityControllerClient() { } |
| 44 | 44 |
| 45 public: | 45 public: |
| 46 virtual bool allowsHorizontalStretching() = 0; | 46 virtual bool allowsHorizontalStretching() = 0; |
| 47 virtual bool allowsVerticalStretching() = 0; | 47 virtual bool allowsVerticalStretching() = 0; |
| 48 // The amount that the view is stretched past the normal allowable bounds. | 48 // The amount that the view is stretched past the normal allowable bounds. |
| 49 // The "overhang" amount. | 49 // The "overhang" amount. |
| 50 virtual IntSize stretchAmount() = 0; | 50 virtual IntSize stretchAmount() = 0; |
| 51 virtual bool pinnedInDirection(const FloatSize&) = 0; | 51 virtual bool pinnedInDirection(const FloatSize&) = 0; |
| 52 virtual bool canScrollHorizontally() = 0; | 52 virtual bool canScrollHorizontally() = 0; |
| 53 virtual bool canScrollVertically() = 0; | 53 virtual bool canScrollVertically() = 0; |
| 54 | 54 |
| 55 // Return the absolute scroll position, not relative to the scroll origin. | 55 // Return the absolute scroll position, not relative to the scroll origin. |
| 56 virtual WebCore::IntPoint absoluteScrollPosition() = 0; | 56 virtual blink::IntPoint absoluteScrollPosition() = 0; |
| 57 | 57 |
| 58 virtual void immediateScrollBy(const FloatSize&) = 0; | 58 virtual void immediateScrollBy(const FloatSize&) = 0; |
| 59 virtual void immediateScrollByWithoutContentEdgeConstraints(const FloatSize&
) = 0; | 59 virtual void immediateScrollByWithoutContentEdgeConstraints(const FloatSize&
) = 0; |
| 60 virtual void startSnapRubberbandTimer() = 0; | 60 virtual void startSnapRubberbandTimer() = 0; |
| 61 virtual void stopSnapRubberbandTimer() = 0; | 61 virtual void stopSnapRubberbandTimer() = 0; |
| 62 | 62 |
| 63 // If the current scroll position is within the overhang area, this function
will cause | 63 // If the current scroll position is within the overhang area, this function
will cause |
| 64 // the page to scroll to the nearest boundary point. | 64 // the page to scroll to the nearest boundary point. |
| 65 virtual void adjustScrollPositionToBoundsIfNecessary() = 0; | 65 virtual void adjustScrollPositionToBoundsIfNecessary() = 0; |
| 66 }; | 66 }; |
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| 127 | 127 |
| 128 // Rubber band state. | 128 // Rubber band state. |
| 129 CFTimeInterval m_startTime; | 129 CFTimeInterval m_startTime; |
| 130 FloatSize m_startStretch; | 130 FloatSize m_startStretch; |
| 131 FloatPoint m_origOrigin; | 131 FloatPoint m_origOrigin; |
| 132 FloatSize m_origVelocity; | 132 FloatSize m_origVelocity; |
| 133 | 133 |
| 134 bool m_snapRubberbandTimerIsActive; | 134 bool m_snapRubberbandTimerIsActive; |
| 135 }; | 135 }; |
| 136 | 136 |
| 137 } // namespace WebCore | 137 } // namespace blink |
| 138 | 138 |
| 139 #endif // USE(RUBBER_BANDING) | 139 #endif // USE(RUBBER_BANDING) |
| 140 | 140 |
| 141 #endif // ScrollElasticityController_h | 141 #endif // ScrollElasticityController_h |
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