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 textObject() 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* context, const Color& fillColor, const Color& strokeColor, float strokeThickness);
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 private:
63 virtual int selectionTop();
64 virtual int selectionHeight();
65
66 public:
67 virtual IntRect selectionRect(int absx, int absy, int startPos, int endPos);
68 bool isSelected(int startPos, int endPos) const;
69 void selectionStartEnd(int& sPos, int& ePos);
70
71 private:
72 virtual void paint(RenderObject::PaintInfo&, int tx, int ty);
73 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty);
74
75 public:
76 RenderText* textObject() const;
77
78 private:
79 virtual void deleteLine(RenderArena*);
80 virtual void extractLine();
81 virtual void attachLine();
82
83 public:
84 virtual RenderObject::SelectionState selectionState();
85
86 private:
clearTruncation()87 virtual void clearTruncation() { m_truncation = cNoTruncation; }
88 virtual int placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool& foundBox);
89
90 public:
91 virtual bool isLineBreak() const;
92
setSpaceAdd(int add)93 void setSpaceAdd(int add) { m_width -= m_toAdd; m_toAdd = add; m_width += m_toAdd; }
94
95 private:
isInlineTextBox()96 virtual bool isInlineTextBox() { return true; }
97
98 public:
isText()99 virtual bool isText() const { return m_treatAsText; }
setIsText(bool b)100 void setIsText(bool b) { m_treatAsText = b; }
101
102 virtual int caretMinOffset() const;
103 virtual int caretMaxOffset() const;
104
105 private:
106 virtual unsigned caretMaxRenderedOffset() const;
107
108 int textPos() const;
109
110 public:
111 virtual int offsetForPosition(int x, bool includePartialGlyphs = true) const;
112 virtual int positionForOffset(int offset) const;
113
114 bool containsCaretOffset(int offset) const; // false for offset after line break
115
116 private:
117 int m_start;
118 unsigned short m_len;
119
120 unsigned short m_truncation; // Where to truncate when text overflow is applied. We use special constants to
121 // denote no truncation (the whole run paints) and full truncation (nothing paints at all).
122
123 protected:
124 void paintCompositionBackground(GraphicsContext*, int tx, int ty, RenderStyle*, const Font&, int startPos, int endPos);
125 void paintDocumentMarkers(GraphicsContext*, int tx, int ty, RenderStyle*, const Font&, bool background);
126 void paintCompositionUnderline(GraphicsContext*, int tx, int ty, const CompositionUnderline&);
127 #if PLATFORM(MAC)
128 void paintCustomHighlight(int tx, int ty, const AtomicString& type);
129 #endif
130
131 private:
132 void paintDecoration(GraphicsContext*, int tx, int ty, int decoration, ShadowData*);
133 void paintSelection(GraphicsContext*, int tx, int ty, RenderStyle*, const Font&);
134 void paintSpellingOrGrammarMarker(GraphicsContext*, int tx, int ty, DocumentMarker, RenderStyle*, const Font&, bool grammar);
135 void paintTextMatchMarker(GraphicsContext*, int tx, int ty, DocumentMarker, RenderStyle*, const Font&);
136 };
137
textObject()138 inline RenderText* InlineTextBox::textObject() const
139 {
140 return toRenderText(m_object);
141 }
142
143 } // namespace WebCore
144
145 #endif // InlineTextBox_h
146