Index: Source/platform/mac/ScrollElasticityController.h |
diff --git a/Source/platform/mac/ScrollElasticityController.h b/Source/platform/mac/ScrollElasticityController.h |
deleted file mode 100644 |
index b436596d7cd9f28d5d9de0d46c095ad0e91d5d8a..0000000000000000000000000000000000000000 |
--- a/Source/platform/mac/ScrollElasticityController.h |
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-/* |
- * Copyright (C) 2011 Apple Inc. All rights reserved. |
- * |
- * Redistribution and use in source and binary forms, with or without |
- * modification, are permitted provided that the following conditions |
- * are met: |
- * 1. Redistributions of source code must retain the above copyright |
- * notice, this list of conditions and the following disclaimer. |
- * 2. Redistributions in binary form must reproduce the above copyright |
- * notice, this list of conditions and the following disclaimer in the |
- * documentation and/or other materials provided with the distribution. |
- * |
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
- * THE POSSIBILITY OF SUCH DAMAGE. |
- */ |
- |
-#ifndef ScrollElasticityController_h |
-#define ScrollElasticityController_h |
- |
-#if USE(RUBBER_BANDING) |
- |
-#include "platform/PlatformExport.h" |
-#include "platform/geometry/FloatPoint.h" |
-#include "platform/geometry/FloatSize.h" |
-#include "platform/scroll/ScrollTypes.h" |
-#include "wtf/Noncopyable.h" |
- |
-namespace blink { |
- |
-class PlatformWheelEvent; |
- |
-class ScrollElasticityControllerClient { |
-protected: |
- virtual ~ScrollElasticityControllerClient() { } |
- |
-public: |
- virtual bool allowsHorizontalStretching() = 0; |
- virtual bool allowsVerticalStretching() = 0; |
- // The amount that the view is stretched past the normal allowable bounds. |
- // The "overhang" amount. |
- virtual IntSize stretchAmount() = 0; |
- virtual bool pinnedInDirection(const FloatSize&) = 0; |
- virtual bool canScrollHorizontally() = 0; |
- virtual bool canScrollVertically() = 0; |
- |
- // Return the absolute scroll position, not relative to the scroll origin. |
- virtual IntPoint absoluteScrollPosition() = 0; |
- |
- virtual void immediateScrollBy(const FloatSize&) = 0; |
- virtual void immediateScrollByWithoutContentEdgeConstraints(const FloatSize&) = 0; |
- virtual void startSnapRubberbandTimer() = 0; |
- virtual void stopSnapRubberbandTimer() = 0; |
- |
- // If the current scroll position is within the overhang area, this function will cause |
- // the page to scroll to the nearest boundary point. |
- virtual void adjustScrollPositionToBoundsIfNecessary() = 0; |
-}; |
- |
-class PLATFORM_EXPORT ScrollElasticityController { |
- WTF_MAKE_NONCOPYABLE(ScrollElasticityController); |
- |
-public: |
- explicit ScrollElasticityController(ScrollElasticityControllerClient*); |
- |
- // This method is responsible for both scrolling and rubber-banding. |
- // |
- // Events are passed by IPC from the embedder. Events on Mac are grouped |
- // into "gestures". If this method returns 'true', then this object has |
- // handled the event. It expects the embedder to continue to forward events |
- // from the gesture. |
- // |
- // This method makes the assumption that there is only 1 input device being |
- // used at a time. If the user simultaneously uses multiple input devices, |
- // Cocoa does not correctly pass all the gestureBegin/End events. The state |
- // of this class is guaranteed to become eventually consistent, once the |
- // user stops using multiple input devices. |
- bool handleWheelEvent(const PlatformWheelEvent&); |
- void snapRubberBandTimerFired(); |
- |
- bool isRubberBandInProgress() const; |
- |
-private: |
- void stopSnapRubberbandTimer(); |
- void snapRubberBand(); |
- |
- // This method determines whether a given event should be handled. The |
- // logic for control events of gestures (PhaseBegan, PhaseEnded) is handled |
- // elsewhere. |
- // |
- // This class handles almost all wheel events. All of the following |
- // conditions must be met for this class to ignore an event: |
- // + No previous events in this gesture have caused any scrolling or rubber |
- // banding. |
- // + The event contains a horizontal component. |
- // + The client's view is pinned in the horizontal direction of the event. |
- // + The wheel event disallows rubber banding in the horizontal direction |
- // of the event. |
- bool shouldHandleEvent(const PlatformWheelEvent&); |
- |
- ScrollElasticityControllerClient* m_client; |
- |
- // There is an active scroll gesture event. This parameter only gets set to |
- // false after the rubber band has been snapped, and before a new gesture |
- // has begun. A careful audit of the code may deprecate the need for this |
- // parameter. |
- bool m_inScrollGesture; |
- // At least one event in the current gesture has been consumed and has |
- // caused the view to scroll or rubber band. All future events in this |
- // gesture will be consumed and overscrolls will cause rubberbanding. |
- bool m_hasScrolled; |
- bool m_momentumScrollInProgress; |
- bool m_ignoreMomentumScrolls; |
- |
- CFTimeInterval m_lastMomentumScrollTimestamp; |
- FloatSize m_overflowScrollDelta; |
- FloatSize m_stretchScrollForce; |
- FloatSize m_momentumVelocity; |
- |
- // Rubber band state. |
- CFTimeInterval m_startTime; |
- FloatSize m_startStretch; |
- FloatPoint m_origOrigin; |
- FloatSize m_origVelocity; |
- |
- bool m_snapRubberbandTimerIsActive; |
-}; |
- |
-} // namespace blink |
- |
-#endif // USE(RUBBER_BANDING) |
- |
-#endif // ScrollElasticityController_h |