1 /*
2 * (C) 1999 Lars Knoll (knoll@kde.org)
3 * (C) 2000 Dirk Mueller (mueller@kde.org)
4 * Copyright (C) 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 *
21 */
22
23 #ifndef InlineTextBox_h
24 #define InlineTextBox_h
25
26 #include "InlineRunBox.h"
27 #include "RenderText.h" // so textRenderer() can be inline
28
29 namespace WebCore {
30
31 struct CompositionUnderline;
32
33 const unsigned short cNoTruncation = USHRT_MAX;
34 const unsigned short cFullTruncation = USHRT_MAX - 1;
35
36 // Helper functions shared by InlineTextBox / SVGRootInlineBox
37 void updateGraphicsContext(GraphicsContext*, const Color& fillColor, const Color& strokeColor, float strokeThickness, ColorSpace);
38 Color correctedTextColor(Color textColor, Color backgroundColor);
39
40 class InlineTextBox : public InlineRunBox {
41 public:
InlineTextBox(RenderObject * obj)42 InlineTextBox(RenderObject* obj)
43 : InlineRunBox(obj)
44 , m_start(0)
45 , m_len(0)
46 , m_truncation(cNoTruncation)
47 {
48 }
49
nextTextBox()50 InlineTextBox* nextTextBox() const { return static_cast<InlineTextBox*>(nextLineBox()); }
prevTextBox()51 InlineTextBox* prevTextBox() const { return static_cast<InlineTextBox*>(prevLineBox()); }
52
start()53 unsigned start() const { return m_start; }
end()54 unsigned end() const { return m_len ? m_start + m_len - 1 : m_start; }
len()55 unsigned len() const { return m_len; }
56
setStart(unsigned start)57 void setStart(unsigned start) { m_start = start; }
setLen(unsigned len)58 void setLen(unsigned len) { m_len = len; }
59
offsetRun(int d)60 void offsetRun(int d) { m_start += d; }
61
62 void setFallbackFonts(const HashSet<const SimpleFontData*>&);
63 void takeFallbackFonts(Vector<const SimpleFontData*>&);
64
truncation()65 unsigned short truncation() { return m_truncation; }
66
67 private:
68 virtual int selectionTop();
69 virtual int selectionHeight();
70
71 public:
72 virtual IntRect selectionRect(int absx, int absy, int startPos, int endPos);
73 bool isSelected(int startPos, int endPos) const;
74 void selectionStartEnd(int& sPos, int& ePos);
75
76 private:
77 virtual void paint(RenderObject::PaintInfo&, int tx, int ty);
78 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty);
79
80 public:
81 RenderText* textRenderer() const;
82
83 private:
84 virtual void deleteLine(RenderArena*);
85 virtual void extractLine();
86 virtual void attachLine();
87
88 public:
89 virtual RenderObject::SelectionState selectionState();
90
91 private:
clearTruncation()92 virtual void clearTruncation() { m_truncation = cNoTruncation; }
93 virtual int placeEllipsisBox(bool flowIsLTR, int visibleLeftEdge, int visibleRightEdge, int ellipsisWidth, bool& foundBox);
94
95 public:
96 virtual bool isLineBreak() const;
97
setSpaceAdd(int add)98 void setSpaceAdd(int add) { m_width -= m_toAdd; m_toAdd = add; m_width += m_toAdd; }
99
100 private:
isInlineTextBox()101 virtual bool isInlineTextBox() { return true; }
102
103 public:
104 virtual int caretMinOffset() const;
105 virtual int caretMaxOffset() const;
106
107 private:
108 virtual unsigned caretMaxRenderedOffset() const;
109
110 int textPos() const;
111
112 public:
113 virtual int offsetForPosition(int x, bool includePartialGlyphs = true) const;
114 virtual int positionForOffset(int offset) const;
115
116 bool containsCaretOffset(int offset) const; // false for offset after line break
117
118 private:
119 int m_start;
120 unsigned short m_len;
121
122 unsigned short m_truncation; // Where to truncate when text overflow is applied. We use special constants to
123 // denote no truncation (the whole run paints) and full truncation (nothing paints at all).
124
125 protected:
126 void paintCompositionBackground(GraphicsContext*, int tx, int ty, RenderStyle*, const Font&, int startPos, int endPos);
127 void paintDocumentMarkers(GraphicsContext*, int tx, int ty, RenderStyle*, const Font&, bool background);
128 void paintCompositionUnderline(GraphicsContext*, int tx, int ty, const CompositionUnderline&);
129 #if PLATFORM(MAC)
130 void paintCustomHighlight(int tx, int ty, const AtomicString& type);
131 #endif
132
133 private:
134 void paintDecoration(GraphicsContext*, int tx, int ty, int decoration, ShadowData*);
135 void paintSelection(GraphicsContext*, int tx, int ty, RenderStyle*, const Font&);
136 void paintSpellingOrGrammarMarker(GraphicsContext*, int tx, int ty, const DocumentMarker&, RenderStyle*, const Font&, bool grammar);
137 void paintTextMatchMarker(GraphicsContext*, int tx, int ty, const DocumentMarker&, RenderStyle*, const Font&);
138 void computeRectForReplacementMarker(int tx, int ty, const DocumentMarker&, RenderStyle*, const Font&);
139 };
140
textRenderer()141 inline RenderText* InlineTextBox::textRenderer() const
142 {
143 return toRenderText(renderer());
144 }
145
146 } // namespace WebCore
147
148 #endif // InlineTextBox_h
149