1 /* 2 * Copyright (C) 2008, 2009 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 "RenderStyleConstants.h" 30 #include "Scrollbar.h" 31 #include <wtf/HashMap.h> 32 33 namespace WebCore { 34 35 class Frame; 36 class RenderBox; 37 class RenderScrollbarPart; 38 class RenderStyle; 39 40 class RenderScrollbar : public Scrollbar { 41 protected: 42 RenderScrollbar(ScrollableArea*, ScrollbarOrientation, RenderBox*, Frame*); 43 44 public: 45 friend class Scrollbar; 46 static PassRefPtr<Scrollbar> createCustomScrollbar(ScrollableArea*, ScrollbarOrientation, RenderBox*, Frame* owningFrame = 0); 47 virtual ~RenderScrollbar(); 48 49 static ScrollbarPart partForStyleResolve(); 50 static RenderScrollbar* scrollbarForStyleResolve(); 51 52 RenderBox* owningRenderer() const; 53 void clearOwningRenderer() { m_owner = 0; } 54 55 void paintPart(GraphicsContext*, ScrollbarPart, const IntRect&); 56 57 IntRect buttonRect(ScrollbarPart); 58 IntRect trackRect(int startLength, int endLength); 59 IntRect trackPieceRectWithMargins(ScrollbarPart, const IntRect&); 60 61 int minimumThumbLength(); 62 63 virtual bool isOverlayScrollbar() const { return false; } 64 65 private: 66 virtual void setParent(ScrollView*); 67 virtual void setEnabled(bool); 68 69 virtual void paint(GraphicsContext*, const IntRect& damageRect); 70 71 virtual void setHoveredPart(ScrollbarPart); 72 virtual void setPressedPart(ScrollbarPart); 73 74 virtual void styleChanged(); 75 76 virtual bool isCustomScrollbar() const { return true; } 77 78 void updateScrollbarParts(bool destroy = false); 79 80 PassRefPtr<RenderStyle> getScrollbarPseudoStyle(ScrollbarPart, PseudoId); 81 void updateScrollbarPart(ScrollbarPart, bool destroy = false); 82 83 RenderBox* m_owner; 84 Frame* m_owningFrame; 85 HashMap<unsigned, RenderScrollbarPart*> m_parts; 86 }; 87 88 inline RenderScrollbar* toRenderScrollbar(Scrollbar* scrollbar) 89 { 90 ASSERT(!scrollbar || scrollbar->isCustomScrollbar()); 91 return static_cast<RenderScrollbar*>(scrollbar); 92 } 93 94 // This will catch anyone doing an unnecessary cast. 95 void toRenderScrollbar(const RenderScrollbar*); 96 97 } // namespace WebCore 98 99 #endif // RenderScrollbar_h 100
