WebCore/RenderScrollbar.h

   1 /*
   2  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef RenderScrollbar_h
  27 #define RenderScrollbar_h
  28
  29 #include "Scrollbar.h"
  30 #include "RenderStyle.h"
  31 #include <wtf/HashMap.h>
  32
  33 namespace WebCore {
  34
  35 class RenderBox;
  36 class RenderScrollbarPart;
  37 class RenderStyle;
  38
  39 class RenderScrollbar : public Scrollbar {
  40 protected:
  41     RenderScrollbar(ScrollbarClient*, ScrollbarOrientation, RenderBox*);
  42
  43 public:
  44     friend class Scrollbar;
  45     static PassRefPtr<Scrollbar> createCustomScrollbar(ScrollbarClient*, ScrollbarOrientation, RenderBox*);
  46     virtual ~RenderScrollbar();
  47
  48     virtual void setParent(ScrollView*);
  49     virtual void setEnabled(bool);
  50
  51     virtual void paint(GraphicsContext*, const IntRect& damageRect);
  52
  53     virtual void setHoveredPart(ScrollbarPart);
  54     virtual void setPressedPart(ScrollbarPart);
  55
  56     void updateScrollbarParts(bool destroy = false);
  57
  58     static ScrollbarPart partForStyleResolve();
  59     static RenderScrollbar* scrollbarForStyleResolve();
  60
  61     virtual void styleChanged();
  62
  63     RenderBox* owningRenderer() const { return m_owner; }
  64
  65     void paintPart(GraphicsContext*, ScrollbarPart, const IntRect&);
  66
  67     IntRect buttonRect(ScrollbarPart);
  68     IntRect trackRect(int startLength, int endLength);
  69     IntRect trackPieceRectWithMargins(ScrollbarPart, const IntRect&);
  70
  71     int minimumThumbLength();
  72
  73 private:
  74     PassRefPtr<RenderStyle> getScrollbarPseudoStyle(ScrollbarPart, RenderStyle::PseudoId);
  75     void updateScrollbarPart(ScrollbarPart, bool destroy = false);
  76
  77     RenderBox* m_owner;
  78     HashMap<unsigned, RenderScrollbarPart*> m_parts;
  79 };
  80
  81 } // namespace WebCore
  82
  83 #endif // RenderScrollbar_h