text: /*
   * Copyright (C) 2008 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. ``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
   * 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 RenderScrollbarTheme_h
  #define RenderScrollbarTheme_h
  
  #include "ScrollbarThemeComposite.h"
  
  namespace WebCore {
  
  class PlatformMouseEvent;
  class Scrollbar;
  class ScrollView;
  
  class RenderScrollbarTheme : public ScrollbarThemeComposite {
  public:
      virtual ~RenderScrollbarTheme() {};
      
      virtual int scrollbarThickness(ScrollbarControlSize controlSize) { return ScrollbarTheme::nativeTheme()->scrollbarThickness(controlSize); }
  
      virtual ScrollbarButtonsPlacement buttonsPlacement() const { return ScrollbarTheme::nativeTheme()->buttonsPlacement(); }
  
      virtual bool supportsControlTints() const { return true; }
  
      virtual void paintScrollCorner(ScrollView*, GraphicsContext* context, const IntRect& cornerRect);
  
      virtual bool shouldCenterOnThumb(Scrollbar* scrollbar, const PlatformMouseEvent& event) { return ScrollbarTheme::nativeTheme()->shouldCenterOnThumb(scrollbar, event); }
      
      virtual double initialAutoscrollTimerDelay() { return ScrollbarTheme::nativeTheme()->initialAutoscrollTimerDelay(); }
      virtual double autoscrollTimerDelay() { return ScrollbarTheme::nativeTheme()->autoscrollTimerDelay(); }
  
      virtual void registerScrollbar(Scrollbar* scrollbar) { return ScrollbarTheme::nativeTheme()->registerScrollbar(scrollbar); }
      virtual void unregisterScrollbar(Scrollbar* scrollbar) { return ScrollbarTheme::nativeTheme()->unregisterScrollbar(scrollbar); }
  
      virtual int minimumThumbLength(Scrollbar*);
  
      void buttonSizesAlongTrackAxis(Scrollbar* scrollbar, int& beforeSize, int& afterSize);
      
      static RenderScrollbarTheme* renderScrollbarTheme();
  
  protected:
      virtual bool hasButtons(Scrollbar*);
      virtual bool hasThumb(Scrollbar*);
  
      virtual IntRect backButtonRect(Scrollbar*, ScrollbarPart, bool painting = false);
      virtual IntRect forwardButtonRect(Scrollbar*, ScrollbarPart, bool painting = false);
      virtual IntRect trackRect(Scrollbar*, bool painting = false);
      
      virtual void paintScrollbarBackground(GraphicsContext*, Scrollbar*);    
      virtual void paintTrackBackground(GraphicsContext*, Scrollbar*, const IntRect&);
      virtual void paintTrackPiece(GraphicsContext*, Scrollbar*, const IntRect&, ScrollbarPart);
      virtual void paintButton(GraphicsContext*, Scrollbar*, const IntRect&, ScrollbarPart);
      virtual void paintThumb(GraphicsContext*, Scrollbar*, const IntRect&);
  
      virtual IntRect constrainTrackRectToTrackPieces(Scrollbar*, const IntRect&);
  };
  
  } // namespace WebCore
  
  #endif // RenderScrollbarTheme_h
  