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 RenderScrollbarPart_h 27 #define RenderScrollbarPart_h 28 29 #include "RenderBlock.h" 30 #include "ScrollTypes.h" 31 32 namespace WebCore { 33 34 class RenderScrollbar; 35 36 class RenderScrollbarPart : public RenderBlock { 37 public: 38 RenderScrollbarPart(Node*, RenderScrollbar* = 0, ScrollbarPart = NoPart); 39 virtual ~RenderScrollbarPart(); 40 renderName()41 virtual const char* renderName() const { return "RenderScrollbarPart"; } 42 requiresLayer()43 virtual bool requiresLayer() const { return false; } 44 45 virtual void layout(); 46 virtual void calcPrefWidths(); 47 48 void paintIntoRect(GraphicsContext*, int tx, int ty, const IntRect&); 49 50 protected: 51 virtual void styleWillChange(StyleDifference diff, const RenderStyle* newStyle); 52 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); 53 virtual void imageChanged(WrappedImagePtr, const IntRect* = 0); 54 55 private: 56 void layoutHorizontalPart(); 57 void layoutVerticalPart(); 58 59 void computeScrollbarWidth(); 60 void computeScrollbarHeight(); 61 62 RenderScrollbar* m_scrollbar; 63 ScrollbarPart m_part; 64 }; 65 66 } // namespace WebCore 67 68 #endif // RenderScrollbarPart_h 69