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 HitTestRequest;
29 class HitTestResult;
30 class RenderLineBoxList;
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 , m_includeLeftEdge(false)
40 , m_includeRightEdge(false)
41 , m_hasTextChildren(true)
42 #ifndef NDEBUG
43 , m_hasBadChildList(false)
44 #endif
45 {
46 // 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
47 // 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
48 // an invisible marker exists. The side effect of having an invisible marker is that the quirks mode behavior of shrinking lines with no
49 // text children must not apply. This change also means that gaps will exist between image bullet list items. Even when the list bullet
50 // is an image, the line is still considered to be immune from the quirk.
51 m_hasTextChildren = obj->style()->display() == LIST_ITEM;
52 }
53
54 #ifndef NDEBUG
55 virtual ~InlineFlowBox();
56 #endif
57
prevFlowBox()58 InlineFlowBox* prevFlowBox() const { return static_cast<InlineFlowBox*>(m_prevLine); }
nextFlowBox()59 InlineFlowBox* nextFlowBox() const { return static_cast<InlineFlowBox*>(m_nextLine); }
60
firstChild()61 InlineBox* firstChild() const { checkConsistency(); return m_firstChild; }
lastChild()62 InlineBox* lastChild() const { checkConsistency(); return m_lastChild; }
63
isLeaf()64 virtual bool isLeaf() const { return false; }
65
66 InlineBox* firstLeafChild() const;
67 InlineBox* lastLeafChild() const;
68
setConstructed()69 virtual void setConstructed()
70 {
71 InlineBox::setConstructed();
72 if (firstChild())
73 firstChild()->setConstructed();
74 }
75
76 void addToLine(InlineBox* child);
77 virtual void deleteLine(RenderArena*);
78 virtual void extractLine();
79 virtual void attachLine();
80 virtual void adjustPosition(int dx, int dy);
81
82 virtual void extractLineBoxFromRenderObject();
83 virtual void attachLineBoxToRenderObject();
84 virtual void removeLineBoxFromRenderObject();
85
86 virtual void clearTruncation();
87
88 virtual void paintBoxDecorations(RenderObject::PaintInfo&, int tx, int ty);
89 virtual void paintMask(RenderObject::PaintInfo&, int tx, int ty);
90 void paintFillLayers(const RenderObject::PaintInfo&, const Color&, const FillLayer*, int tx, int ty, int w, int h, CompositeOperator = CompositeSourceOver);
91 void paintFillLayer(const RenderObject::PaintInfo&, const Color&, const FillLayer*, int tx, int ty, int w, int h, CompositeOperator = CompositeSourceOver);
92 void paintBoxShadow(GraphicsContext*, RenderStyle*, ShadowStyle, int tx, int ty, int w, int h);
93 virtual void paintTextDecorations(RenderObject::PaintInfo&, int tx, int ty, bool paintedChildren = false);
94 virtual void paint(RenderObject::PaintInfo&, int tx, int ty);
95 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty);
96
97 virtual RenderLineBoxList* rendererLineBoxes() const;
98
marginBorderPaddingLeft()99 int marginBorderPaddingLeft() const { return marginLeft() + borderLeft() + paddingLeft(); }
marginBorderPaddingRight()100 int marginBorderPaddingRight() const { return marginRight() + borderRight() + paddingRight(); }
marginLeft()101 int marginLeft() const { if (includeLeftEdge()) return boxModelObject()->marginLeft(); return 0; }
marginRight()102 int marginRight() const { if (includeRightEdge()) return boxModelObject()->marginRight(); return 0; }
borderLeft()103 int borderLeft() const { if (includeLeftEdge()) return renderer()->style()->borderLeftWidth(); return 0; }
borderRight()104 int borderRight() const { if (includeRightEdge()) return renderer()->style()->borderRightWidth(); return 0; }
borderTop()105 int borderTop() const { return renderer()->style()->borderTopWidth(); }
borderBottom()106 int borderBottom() const { return renderer()->style()->borderBottomWidth(); }
paddingLeft()107 int paddingLeft() const { if (includeLeftEdge()) return boxModelObject()->paddingLeft(); return 0; }
paddingRight()108 int paddingRight() const { if (includeRightEdge()) return boxModelObject()->paddingRight(); return 0; }
paddingTop()109 int paddingTop() const { return boxModelObject()->paddingTop(); }
paddingBottom()110 int paddingBottom() const { return boxModelObject()->paddingBottom(); }
111
includeLeftEdge()112 bool includeLeftEdge() const { return m_includeLeftEdge; }
includeRightEdge()113 bool includeRightEdge() const { return m_includeRightEdge; }
setEdges(bool includeLeft,bool includeRight)114 void setEdges(bool includeLeft, bool includeRight)
115 {
116 m_includeLeftEdge = includeLeft;
117 m_includeRightEdge = includeRight;
118 }
119
120 // Helper functions used during line construction and placement.
121 void determineSpacingForFlowBoxes(bool lastLine, RenderObject* endObject);
122 int getFlowSpacingWidth();
123 bool onEndChain(RenderObject* endObject);
124 virtual int placeBoxesHorizontally(int x, int& leftPosition, int& rightPosition, bool& needsWordSpacing);
125 virtual int verticallyAlignBoxes(int heightOfBlock);
126 void computeLogicalBoxHeights(int& maxPositionTop, int& maxPositionBottom,
127 int& maxAscent, int& maxDescent, bool strictMode);
128 void adjustMaxAscentAndDescent(int& maxAscent, int& maxDescent,
129 int maxPositionTop, int maxPositionBottom);
130 void placeBoxesVertically(int y, int maxHeight, int maxAscent, bool strictMode,
131 int& topPosition, int& bottomPosition, int& selectionTop, int& selectionBottom);
132
setVerticalOverflowPositions(int,int)133 virtual void setVerticalOverflowPositions(int /*top*/, int /*bottom*/) { }
setVerticalSelectionPositions(int,int)134 virtual void setVerticalSelectionPositions(int /*top*/, int /*bottom*/) { }
maxHorizontalVisualOverflow()135 short maxHorizontalVisualOverflow() const { return m_maxHorizontalVisualOverflow; }
136
137 void removeChild(InlineBox* child);
138
139 virtual RenderObject::SelectionState selectionState();
140
141 virtual bool canAccommodateEllipsis(bool ltr, int blockEdge, int ellipsisWidth);
142 virtual int placeEllipsisBox(bool ltr, int blockLeftEdge, int blockRightEdge, int ellipsisWidth, bool&);
143
hasTextChildren()144 bool hasTextChildren() const { return m_hasTextChildren; }
145
146 void checkConsistency() const;
147 void setHasBadChildList();
148
149 private:
isInlineFlowBox()150 virtual bool isInlineFlowBox() const { return true; }
151
152 InlineBox* m_firstChild;
153 InlineBox* m_lastChild;
154 short m_maxHorizontalVisualOverflow;
155
156 bool m_includeLeftEdge : 1;
157 bool m_includeRightEdge : 1;
158 bool m_hasTextChildren : 1;
159
160 #ifndef NDEBUG
161 bool m_hasBadChildList;
162 #endif
163 };
164
165 #ifdef NDEBUG
checkConsistency()166 inline void InlineFlowBox::checkConsistency() const
167 {
168 }
169 #endif
170
setHasBadChildList()171 inline void InlineFlowBox::setHasBadChildList()
172 {
173 #ifndef NDEBUG
174 m_hasBadChildList = true;
175 #endif
176 }
177
178 } // namespace WebCore
179
180 #ifndef NDEBUG
181 // Outside the WebCore namespace for ease of invocation from gdb.
182 void showTree(const WebCore::InlineFlowBox*);
183 #endif
184
185 #endif // InlineFlowBox_h
186