1 /* 2 * This file is part of the select element renderer in WebCore. 3 * 4 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 16 * its contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef RenderListBox_h 32 #define RenderListBox_h 33 34 #include "RenderBlock.h" 35 #include "ScrollbarClient.h" 36 37 namespace WebCore { 38 39 class HTMLSelectElement; 40 41 class RenderListBox : public RenderBlock, private ScrollbarClient { 42 public: 43 RenderListBox(HTMLSelectElement*); 44 ~RenderListBox(); 45 renderName()46 virtual const char* renderName() const { return "RenderListBox"; } 47 isListBox()48 virtual bool isListBox() const { return true; } 49 50 virtual void updateFromElement(); 51 canHaveChildren()52 virtual bool canHaveChildren() const { return false; } 53 hasControlClip()54 virtual bool hasControlClip() const { return true; } 55 virtual void paintObject(PaintInfo&, int tx, int ty); 56 virtual IntRect controlClipRect(int tx, int ty) const; 57 58 virtual bool isPointInOverflowControl(HitTestResult&, int x, int y, int tx, int ty); 59 60 virtual bool scroll(ScrollDirection, ScrollGranularity, float multiplier = 1.0f); 61 62 virtual void calcPrefWidths(); 63 virtual int baselinePosition(bool firstLine, bool isRootLineBox) const; 64 virtual void calcHeight(); 65 66 virtual void layout(); 67 68 void selectionChanged(); 69 setOptionsChanged(bool changed)70 void setOptionsChanged(bool changed) { m_optionsChanged = changed; } 71 72 int listIndexAtOffset(int x, int y); 73 IntRect itemBoundingBoxRect(int tx, int ty, int index); 74 75 bool scrollToRevealElementAtListIndex(int index); 76 bool listIndexIsVisible(int index); 77 canBeProgramaticallyScrolled(bool)78 virtual bool canBeProgramaticallyScrolled(bool) const { return true; } 79 virtual void autoscroll(); 80 virtual void stopAutoscroll(); 81 shouldPanScroll()82 virtual bool shouldPanScroll() const { return true; } 83 virtual void panScroll(const IntPoint&); 84 85 int scrollToward(const IntPoint&); // Returns the new index or -1 if no scroll occurred 86 87 virtual int verticalScrollbarWidth() const; 88 virtual int scrollLeft() const; 89 virtual int scrollTop() const; 90 virtual int scrollWidth() const; 91 virtual int scrollHeight() const; 92 virtual void setScrollLeft(int); 93 virtual void setScrollTop(int); 94 95 protected: 96 virtual void styleDidChange(RenderStyle::Diff, const RenderStyle* oldStyle); 97 98 private: 99 // ScrollbarClient interface. 100 virtual void valueChanged(Scrollbar*); 101 virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&); 102 virtual bool isActive() const; scrollbarCornerPresent()103 virtual bool scrollbarCornerPresent() const { return false; } // We don't support resize on list boxes yet. If we did this would have to change. 104 105 void setHasVerticalScrollbar(bool hasScrollbar); 106 PassRefPtr<Scrollbar> createScrollbar(); 107 void destroyScrollbar(); 108 109 int itemHeight() const; 110 void valueChanged(unsigned listIndex); 111 int size() const; 112 int numVisibleItems() const; 113 int numItems() const; 114 int listHeight() const; 115 void paintScrollbar(PaintInfo&, int tx, int ty); 116 void paintItemForeground(PaintInfo&, int tx, int ty, int listIndex); 117 void paintItemBackground(PaintInfo&, int tx, int ty, int listIndex); 118 void scrollToRevealSelection(); 119 120 bool m_optionsChanged; 121 bool m_scrollToRevealSelectionAfterLayout; 122 bool m_inAutoscroll; 123 int m_optionsWidth; 124 int m_indexOffset; 125 126 RefPtr<Scrollbar> m_vBar; 127 }; 128 129 } // namepace WebCore 130 131 #endif // RenderListBox_h 132