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26 #ifndef AutoscrollController_h
27 #define AutoscrollController_h
29 #include "platform/geometry/IntPoint.h"
30 #include "wtf/PassOwnPtr.h"
38 class PlatformMouseEvent;
44 AutoscrollForDragAndDrop,
45 AutoscrollForSelection,
47 AutoscrollForPanCanStop,
52 // AutscrollController handels autoscroll and pan scroll for EventHandler.
53 class AutoscrollController {
55 static PassOwnPtr<AutoscrollController> create(Page&);
57 void animate(double monotonicFrameBeginTime);
58 bool autoscrollInProgress() const;
59 bool autoscrollInProgress(const RenderBox*) const;
60 bool panScrollInProgress() const;
61 void startAutoscrollForSelection(RenderObject*);
62 void stopAutoscroll();
63 void stopAutoscrollIfNeeded(RenderObject*);
64 void updateAutoscrollRenderer();
65 void updateDragAndDrop(Node* targetNode, const IntPoint& eventPosition, double eventTime);
67 void handleMouseReleaseForPanScrolling(LocalFrame*, const PlatformMouseEvent&);
68 void startPanScrolling(RenderBox*, const IntPoint&);
72 explicit AutoscrollController(Page&);
74 void startAutoscroll();
77 void updatePanScrollState(FrameView*, const IntPoint& lastKnownMousePosition);
81 RenderBox* m_autoscrollRenderer;
82 AutoscrollType m_autoscrollType;
83 IntPoint m_dragAndDropAutoscrollReferencePosition;
84 double m_dragAndDropAutoscrollStartTime;
86 IntPoint m_panScrollStartPos;
92 #endif // AutoscrollController_h