--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebKit/s60/webview/WebPageScrollHandler.h	Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,205 @@
+/*
+* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:   Implements page scrolling functionality
+*
+*/
+
+
+
+#ifndef WEBPAGESCROLLHANDLER_H
+#define WEBPAGESCROLLHANDLER_H
+
+//  INCLUDES
+#include <e32base.h>
+#include <coedef.h>
+#include <w32std.h>
+#include <rt_gesturehelper.h>
+#include "WebScrollingDecelerator.h"
+
+
+// MACROS
+
+// FORWARD DECLARATIONS
+class WebView;
+class WebFrame;
+class WebFrameView;
+class WebScrollbarDrawer;
+class WebScrollingDeceleratorGH;
+
+namespace WebCore
+{
+    class Element;        
+};
+
+enum ScrollDirectionState
+{
+    ScrollDirectionUnassigned,
+    ScrollDirectionX,
+    ScrollDirectionY,
+    ScrollDirectionXY
+};
+
+class ScrollableView : public CBase
+{
+    public:
+        ScrollableView() {}
+        ~ScrollableView() {}
+        TPoint contentPos();
+        WebFrameView* activeFrameView();
+
+    public:
+        WebFrameView* m_frameView;
+        WebCore::Element* m_scrollingElement;
+};
+
+// CLASS DECLARATION
+class WebPageScrollHandler: public CBase
+    {
+    public:  // Constructor and destructor
+
+        /**
+        * Two-phased constructor.
+        */
+        static WebPageScrollHandler* NewL( WebView& webView );
+
+        /**
+        * Destructor.
+        */
+        virtual ~WebPageScrollHandler();
+
+    private:  // Constructors
+
+        /**
+        * C++ default constructor.
+        */
+        WebPageScrollHandler( WebView& webView );
+
+        /**
+        * By default Symbian 2nd phase constructor is private.
+        */
+        void constructL();
+
+    public: // New functions
+        /**
+        * @since 5.0
+        * @param
+        * @return
+        */
+        bool  touchScrolling() { return m_touchScrolling;}
+        
+        /**
+        * @since 5.0
+        * @param
+        * @return
+        */
+        void handlePageOverviewScrollingL(const TPointerEvent& pointerEvent);
+
+        /**
+        * @since 5.0
+        * param
+        * return
+        */
+        void handlePageOverviewScrolling();
+        
+
+        /**
+        * @since 5.0
+        * param
+        * return
+        */
+        void setupScrolling(const TPoint& aNewPosition);
+
+        /**
+        * @since 5.0
+        * param
+        * return
+        */
+        WebFrameView* currentScrollingFrameView() { return m_scrollableView.m_frameView;}
+        
+        /**
+        * @since 5.0
+        * param
+        * return
+        */
+        void updateScrolling(const TPointerEvent& pointerEvent);
+        
+        /**
+        * @since 5.0
+        * param
+        * return
+        */
+        void scrollContent();
+        /**
+        * @since 5.0
+        * param
+        * return
+        */
+        void handlePageOverviewScrollCallback();
+        
+        /**
+        * @since 5.0
+        * param
+        * return
+        */
+        WebScrollbarDrawer*  scrollbarDrawer() {return m_scrollbarDrawer;}
+
+        //callbacks
+        static int pageOverviewScrollCallback( TAny* aPtr );
+        //static int handleScrollTimerEventCallback( TAny* ptr);
+        void scrollPageOverviewGH();
+        void handleScrollingGH(const RT_GestureHelper::MGestureEvent& aEvent);
+        void handleTouchDownGH(const RT_GestureHelper::MGestureEvent& aEvent);
+        void handleTouchUpGH(const RT_GestureHelper::MGestureEvent& aEvent);
+        void updateScrollbars(const TPoint& scrollPos, TPoint& newscrollDelta);
+
+public:
+
+     private:
+        void calculateScrollDirection(int absX, int absY);
+        bool calculateScrollableFrameView(const TPoint& aNewPosition);
+        bool calculateScrollableElement(const TPoint& aNewPosition);
+        
+        void scrollPageOverview(const TPointerEvent& pointerEvent);
+        bool startDeceleration(const RT_GestureHelper::MGestureEvent& aEvent);
+        
+     private:  
+        // Pointer to owning view
+        WebView* m_webView; // not owned
+
+        CPeriodic* m_pageOverviewScrollPeriodic;
+
+        TPointerEvent m_lastPointerEvent;
+        TPointerEvent m_currentPointerEvent;
+        TPoint m_lastPosition;
+        TPoint m_currentPosition;
+        TPoint m_focalPoint;
+        bool m_touchScrolling; // in page overview mode
+        bool m_isXScrollable;
+        bool m_isYScrollable;
+        TTime m_lastMoveEventTime;
+        TTime m_pageOverviewEventTime;
+        WebScrollingDecelerator* m_decel;
+	WebScrollingDeceleratorGH* m_decelGH; 
+        TPointerEvent m_lastDragEvent;
+        CPeriodic* m_scrollTimer;
+        ScrollableView m_scrollableView;
+        TPoint m_currentNormalizedPosition; //normalized position
+        enum ScrollDirectionState m_scrollDirectionState;        
+        WebScrollbarDrawer* m_scrollbarDrawer;
+
+    };
+
+#endif      // WEBPAGESCROLLHANDLER_H
+
+// End of File