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 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 static ScrollbarPart partForStyleResolve(); 49 static RenderScrollbar* scrollbarForStyleResolve(); 50 51 RenderBox* owningRenderer() const { return m_owner; } 52 53 void paintPart(GraphicsContext*, ScrollbarPart, const IntRect&); 54 55 IntRect buttonRect(ScrollbarPart); 56 IntRect trackRect(int startLength, int endLength); 57 IntRect trackPieceRectWithMargins(ScrollbarPart, const IntRect&); 58 59 int minimumThumbLength(); 60 61 private: 62 virtual void setParent(ScrollView*); 63 virtual void setEnabled(bool); 64 65 virtual void paint(GraphicsContext*, const IntRect& damageRect); 66 67 virtual void setHoveredPart(ScrollbarPart); 68 virtual void setPressedPart(ScrollbarPart); 69 70 virtual void styleChanged(); 71 72 virtual bool isCustomScrollbar() const { return true; } 73 74 void updateScrollbarParts(bool destroy = false); 75 76 PassRefPtr<RenderStyle> getScrollbarPseudoStyle(ScrollbarPart, PseudoId); 77 void updateScrollbarPart(ScrollbarPart, bool destroy = false); 78 79 RenderBox* m_owner; 80 HashMap<unsigned, RenderScrollbarPart*> m_parts; 81 }; 82 83 inline RenderScrollbar* toRenderScrollbar(Scrollbar* scrollbar) 84 { 85 ASSERT(!scrollbar || scrollbar->isCustomScrollbar()); 86 return static_cast<RenderScrollbar*>(scrollbar); 87 } 88 89 // This will catch anyone doing an unnecessary cast. 90 void toRenderScrollbar(const RenderScrollbar*); 91 92 } // namespace WebCore 93 94 #endif // RenderScrollbar_h 95