/*
* Copyright (C) 2006, 2007, 2009, 2010, 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
* 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 AutoscrollController_h
#define AutoscrollController_h
#include "platform/geometry/IntPoint.h"
#include "wtf/PassOwnPtr.h"
namespace WebCore {
class EventHandler;
class LocalFrame;
class FrameView;
class Node;
class Page;
class PlatformMouseEvent;
class RenderBox;
class RenderObject;
enum AutoscrollType {
NoAutoscroll,
AutoscrollForDragAndDrop,
AutoscrollForSelection,
#if OS(WIN)
AutoscrollForPanCanStop,
AutoscrollForPan,
#endif
};
// AutscrollController handels autoscroll and pan scroll for EventHandler.
class AutoscrollController {
public:
static PassOwnPtr<AutoscrollController> create(Page&);
void animate(double monotonicFrameBeginTime);
bool autoscrollInProgress() const;
bool autoscrollInProgress(const RenderBox*) const;
bool panScrollInProgress() const;
void startAutoscrollForSelection(RenderObject*);
void stopAutoscroll();
void stopAutoscrollIfNeeded(RenderObject*);
void updateAutoscrollRenderer();
void updateDragAndDrop(Node* targetNode, const IntPoint& eventPosition, double eventTime);
#if OS(WIN)
void handleMouseReleaseForPanScrolling(LocalFrame*, const PlatformMouseEvent&);
void startPanScrolling(RenderBox*, const IntPoint&);
#endif
private:
explicit AutoscrollController(Page&);
void startAutoscroll();
#if OS(WIN)
void updatePanScrollState(FrameView*, const IntPoint& lastKnownMousePosition);
#endif
Page& m_page;
RenderBox* m_autoscrollRenderer;
AutoscrollType m_autoscrollType;
IntPoint m_dragAndDropAutoscrollReferencePosition;
double m_dragAndDropAutoscrollStartTime;
#if OS(WIN)
IntPoint m_panScrollStartPos;
#endif
};
} // namespace WebCore
#endif // AutoscrollController_h