1 /*
2 * This file is part of the select element renderer in WebCore.
3 *
4 * Copyright (C) 2006, 2007, 2009 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 RenderListBox : public RenderBlock, private ScrollbarClient {
40 public:
41 RenderListBox(Element*);
42 virtual ~RenderListBox();
43
44 void selectionChanged();
45
setOptionsChanged(bool changed)46 void setOptionsChanged(bool changed) { m_optionsChanged = changed; }
47
48 int listIndexAtOffset(int x, int y);
49 IntRect itemBoundingBoxRect(int tx, int ty, int index);
50
51 bool scrollToRevealElementAtListIndex(int index);
52 bool listIndexIsVisible(int index);
53
54 int scrollToward(const IntPoint&); // Returns the new index or -1 if no scroll occurred
55
56 private:
renderName()57 virtual const char* renderName() const { return "RenderListBox"; }
58
isListBox()59 virtual bool isListBox() const { return true; }
60
61 virtual void updateFromElement();
62
canHaveChildren()63 virtual bool canHaveChildren() const { return false; }
64
hasControlClip()65 virtual bool hasControlClip() const { return true; }
66 virtual void paintObject(PaintInfo&, int tx, int ty);
67 virtual IntRect controlClipRect(int tx, int ty) const;
68
69 virtual bool isPointInOverflowControl(HitTestResult&, int x, int y, int tx, int ty);
70
71 virtual bool scroll(ScrollDirection, ScrollGranularity, float multiplier = 1.0f);
72
73 virtual void calcPrefWidths();
74 virtual int baselinePosition(bool firstLine, bool isRootLineBox) const;
75 virtual void calcHeight();
76
77 virtual void layout();
78
canBeProgramaticallyScrolled(bool)79 virtual bool canBeProgramaticallyScrolled(bool) const { return true; }
80 virtual void autoscroll();
81 virtual void stopAutoscroll();
82
shouldPanScroll()83 virtual bool shouldPanScroll() const { return true; }
84 virtual void panScroll(const IntPoint&);
85
86 virtual int verticalScrollbarWidth() const;
87 virtual int scrollLeft() const;
88 virtual int scrollTop() const;
89 virtual int scrollWidth() const;
90 virtual int scrollHeight() const;
91 virtual void setScrollLeft(int);
92 virtual void setScrollTop(int);
93
94 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
95
96 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
97
98 // ScrollbarClient interface.
99 virtual void valueChanged(Scrollbar*);
100 virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&);
101 virtual bool isActive() const;
scrollbarCornerPresent()102 virtual bool scrollbarCornerPresent() const { return false; } // We don't support resize on list boxes yet. If we did this would have to change.
103 virtual IntRect convertFromScrollbarToContainingView(const Scrollbar*, const IntRect&) const;
104 virtual IntRect convertFromContainingViewToScrollbar(const Scrollbar*, const IntRect&) const;
105 virtual IntPoint convertFromScrollbarToContainingView(const Scrollbar*, const IntPoint&) const;
106 virtual IntPoint convertFromContainingViewToScrollbar(const Scrollbar*, const IntPoint&) const;
107
108 void setHasVerticalScrollbar(bool hasScrollbar);
109 PassRefPtr<Scrollbar> createScrollbar();
110 void destroyScrollbar();
111
112 int itemHeight() const;
113 void valueChanged(unsigned listIndex);
114 int size() const;
115 int numVisibleItems() const;
116 int numItems() const;
117 int listHeight() const;
118 void paintScrollbar(PaintInfo&, int tx, int ty);
119 void paintItemForeground(PaintInfo&, int tx, int ty, int listIndex);
120 void paintItemBackground(PaintInfo&, int tx, int ty, int listIndex);
121 void scrollToRevealSelection();
122
123 bool m_optionsChanged;
124 bool m_scrollToRevealSelectionAfterLayout;
125 bool m_inAutoscroll;
126 int m_optionsWidth;
127 int m_indexOffset;
128
129 RefPtr<Scrollbar> m_vBar;
130 };
131
toRenderListBox(RenderObject * object)132 inline RenderListBox* toRenderListBox(RenderObject* object)
133 {
134 ASSERT(!object || object->isListBox());
135 return static_cast<RenderListBox*>(object);
136 }
137
138 // This will catch anyone doing an unnecessary cast.
139 void toRenderListBox(const RenderListBox*);
140
141 } // namepace WebCore
142
143 #endif // RenderListBox_h
144