1 /*
2 * Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 *
19 */
20
21 #ifndef InlineFlowBox_h
22 #define InlineFlowBox_h
23
24 #include "InlineRunBox.h"
25
26 namespace WebCore {
27
28 class HitTestResult;
29
30 struct HitTestRequest;
31
32 class InlineFlowBox : public InlineRunBox {
33 public:
InlineFlowBox(RenderObject * obj)34 InlineFlowBox(RenderObject* obj)
35 : InlineRunBox(obj)
36 , m_firstChild(0)
37 , m_lastChild(0)
38 , m_maxHorizontalVisualOverflow(0)
39 #ifndef NDEBUG
40 , m_hasBadChildList(false)
41 #endif
42 {
43 // Internet Explorer and Firefox always create a marker for list items, even when the list-style-type is none. We do not make a marker
44 // in the list-style-type: none case, since it is wasteful to do so. However, in order to match other browsers we have to pretend like
45 // an invisible marker exists. The side effect of having an invisible marker is that the quirks mode behavior of shrinking lines with no
46 // text children must not apply. This change also means that gaps will exist between image bullet list items. Even when the list bullet
47 // is an image, the line is still considered to be immune from the quirk.
48 m_hasTextChildren = obj->style()->display() == LIST_ITEM;
49 }
50
51 #ifndef NDEBUG
52 virtual ~InlineFlowBox();
53 #endif
54
55 RenderFlow* flowObject();
56
isInlineFlowBox()57 virtual bool isInlineFlowBox() { return true; }
58
prevFlowBox()59 InlineFlowBox* prevFlowBox() const { return static_cast<InlineFlowBox*>(m_prevLine); }
nextFlowBox()60 InlineFlowBox* nextFlowBox() const { return static_cast<InlineFlowBox*>(m_nextLine); }
61
firstChild()62 InlineBox* firstChild() { checkConsistency(); return m_firstChild; }
lastChild()63 InlineBox* lastChild() { checkConsistency(); return m_lastChild; }
64
65 virtual InlineBox* firstLeafChild();
66 virtual InlineBox* lastLeafChild();
67 InlineBox* firstLeafChildAfterBox(InlineBox* start = 0);
68 InlineBox* lastLeafChildBeforeBox(InlineBox* start = 0);
69
setConstructed()70 virtual void setConstructed()
71 {
72 InlineBox::setConstructed();
73 if (firstChild())
74 firstChild()->setConstructed();
75 }
76
77 void addToLine(InlineBox* child);
78 virtual void deleteLine(RenderArena*);
79 virtual void extractLine();
80 virtual void attachLine();
81 virtual void adjustPosition(int dx, int dy);
82
83 virtual void clearTruncation();
84
85 virtual void paintBoxDecorations(RenderObject::PaintInfo&, int tx, int ty);
86 virtual void paintMask(RenderObject::PaintInfo&, int tx, int ty);
87 void paintFillLayers(const RenderObject::PaintInfo&, const Color&, const FillLayer*,
88 int my, int mh, int tx, int ty, int w, int h, CompositeOperator = CompositeSourceOver);
89 void paintFillLayer(const RenderObject::PaintInfo&, const Color&, const FillLayer*,
90 int my, int mh, int tx, int ty, int w, int h, CompositeOperator = CompositeSourceOver);
91 void paintBoxShadow(GraphicsContext*, RenderStyle*, int tx, int ty, int w, int h);
92 virtual void paintTextDecorations(RenderObject::PaintInfo&, int tx, int ty, bool paintedChildren = false);
93 virtual void paint(RenderObject::PaintInfo&, int tx, int ty);
94 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty);
95
96 int marginBorderPaddingLeft();
97 int marginBorderPaddingRight();
98 int marginLeft();
99 int marginRight();
borderLeft()100 int borderLeft() { if (includeLeftEdge()) return renderBox()->borderLeft(); return 0; }
borderRight()101 int borderRight() { if (includeRightEdge()) return renderBox()->borderRight(); return 0; }
paddingLeft()102 int paddingLeft() { if (includeLeftEdge()) return renderBox()->paddingLeft(); return 0; }
paddingRight()103 int paddingRight() { if (includeRightEdge()) return renderBox()->paddingRight(); return 0; }
104
includeLeftEdge()105 bool includeLeftEdge() { return m_includeLeftEdge; }
includeRightEdge()106 bool includeRightEdge() { return m_includeRightEdge; }
setEdges(bool includeLeft,bool includeRight)107 void setEdges(bool includeLeft, bool includeRight)
108 {
109 m_includeLeftEdge = includeLeft;
110 m_includeRightEdge = includeRight;
111 }
112
113 // Helper functions used during line construction and placement.
114 void determineSpacingForFlowBoxes(bool lastLine, RenderObject* endObject);
115 int getFlowSpacingWidth();
116 bool onEndChain(RenderObject* endObject);
117 virtual int placeBoxesHorizontally(int x, int& leftPosition, int& rightPosition, bool& needsWordSpacing);
118 virtual int verticallyAlignBoxes(int heightOfBlock);
119 void computeLogicalBoxHeights(int& maxPositionTop, int& maxPositionBottom,
120 int& maxAscent, int& maxDescent, bool strictMode);
121 void adjustMaxAscentAndDescent(int& maxAscent, int& maxDescent,
122 int maxPositionTop, int maxPositionBottom);
123 void placeBoxesVertically(int y, int maxHeight, int maxAscent, bool strictMode,
124 int& topPosition, int& bottomPosition, int& selectionTop, int& selectionBottom);
125 void shrinkBoxesWithNoTextChildren(int topPosition, int bottomPosition);
126
setVerticalOverflowPositions(int,int)127 virtual void setVerticalOverflowPositions(int /*top*/, int /*bottom*/) { }
setVerticalSelectionPositions(int,int)128 virtual void setVerticalSelectionPositions(int /*top*/, int /*bottom*/) { }
maxHorizontalVisualOverflow()129 int maxHorizontalVisualOverflow() const { return m_maxHorizontalVisualOverflow; }
130
131 void removeChild(InlineBox* child);
132
133 virtual RenderObject::SelectionState selectionState();
134
135 virtual bool canAccommodateEllipsis(bool ltr, int blockEdge, int ellipsisWidth);
136 virtual int placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool&);
137
138 void checkConsistency() const;
139 void setHasBadChildList();
140
141 private:
142 InlineBox* m_firstChild;
143 InlineBox* m_lastChild;
144 int m_maxHorizontalVisualOverflow;
145
146 #ifndef NDEBUG
147 bool m_hasBadChildList;
148 #endif
149 };
150
151 #ifdef NDEBUG
checkConsistency()152 inline void InlineFlowBox::checkConsistency() const
153 {
154 }
155 #endif
156
setHasBadChildList()157 inline void InlineFlowBox::setHasBadChildList()
158 {
159 #ifndef NDEBUG
160 m_hasBadChildList = true;
161 #endif
162 }
163
164 } // namespace WebCore
165
166 #ifndef NDEBUG
167 // Outside the WebCore namespace for ease of invocation from gdb.
168 void showTree(const WebCore::InlineFlowBox*);
169 #endif
170
171 #endif // InlineFlowBox_h
172