source: trunk/tools/designer/src/lib/shared/htmlhighlighter.cpp

Last change on this file was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 7.3 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
6**
7** This file is part of the Qt Designer of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at qt-info@nokia.com.
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include <QtCore/QTextStream>
43
44#include "htmlhighlighter_p.h"
45
46QT_BEGIN_NAMESPACE
47
48namespace qdesigner_internal {
49
50HtmlHighlighter::HtmlHighlighter(QTextEdit *textEdit)
51 : QSyntaxHighlighter(textEdit)
52{
53 QTextCharFormat entityFormat;
54 entityFormat.setForeground(Qt::red);
55 setFormatFor(Entity, entityFormat);
56
57 QTextCharFormat tagFormat;
58 tagFormat.setForeground(Qt::darkMagenta);
59 tagFormat.setFontWeight(QFont::Bold);
60 setFormatFor(Tag, tagFormat);
61
62 QTextCharFormat commentFormat;
63 commentFormat.setForeground(Qt::gray);
64 commentFormat.setFontItalic(true);
65 setFormatFor(Comment, commentFormat);
66
67 QTextCharFormat attributeFormat;
68 attributeFormat.setForeground(Qt::black);
69 attributeFormat.setFontWeight(QFont::Bold);
70 setFormatFor(Attribute, attributeFormat);
71
72 QTextCharFormat valueFormat;
73 valueFormat.setForeground(Qt::blue);
74 setFormatFor(Value, valueFormat);
75}
76
77void HtmlHighlighter::setFormatFor(Construct construct,
78 const QTextCharFormat &format)
79{
80 m_formats[construct] = format;
81 rehighlight();
82}
83
84void HtmlHighlighter::highlightBlock(const QString &text)
85{
86 static const QLatin1Char tab = QLatin1Char('\t');
87 static const QLatin1Char space = QLatin1Char(' ');
88 static const QLatin1Char amp = QLatin1Char('&');
89 static const QLatin1Char startTag = QLatin1Char('<');
90 static const QLatin1Char endTag = QLatin1Char('>');
91 static const QLatin1Char quot = QLatin1Char('"');
92 static const QLatin1Char apos = QLatin1Char('\'');
93 static const QLatin1Char semicolon = QLatin1Char(';');
94 static const QLatin1Char equals = QLatin1Char('=');
95 static const QLatin1String startComment = QLatin1String("<!--");
96 static const QLatin1String endComment = QLatin1String("-->");
97 static const QLatin1String endElement = QLatin1String("/>");
98
99 int state = previousBlockState();
100 int len = text.length();
101 int start = 0;
102 int pos = 0;
103
104 while (pos < len) {
105 switch (state) {
106 case NormalState:
107 default:
108 while (pos < len) {
109 QChar ch = text.at(pos);
110 if (ch == startTag) {
111 if (text.mid(pos, 4) == startComment) {
112 state = InComment;
113 } else {
114 state = InTag;
115 start = pos;
116 while (pos < len && text.at(pos) != space
117 && text.at(pos) != endTag
118 && text.at(pos) != tab
119 && text.mid(pos, 2) != endElement)
120 ++pos;
121 if (text.mid(pos, 2) == endElement)
122 ++pos;
123 setFormat(start, pos - start,
124 m_formats[Tag]);
125 break;
126 }
127 break;
128 } else if (ch == amp) {
129 start = pos;
130 while (pos < len && text.at(pos++) != semicolon)
131 ;
132 setFormat(start, pos - start,
133 m_formats[Entity]);
134 } else {
135 // No tag, comment or entity started, continue...
136 ++pos;
137 }
138 }
139 break;
140 case InComment:
141 start = pos;
142 while (pos < len) {
143 if (text.mid(pos, 3) == endComment) {
144 pos += 3;
145 state = NormalState;
146 break;
147 } else {
148 ++pos;
149 }
150 }
151 setFormat(start, pos - start, m_formats[Comment]);
152 break;
153 case InTag:
154 QChar quote = QChar::Null;
155 while (pos < len) {
156 QChar ch = text.at(pos);
157 if (quote.isNull()) {
158 start = pos;
159 if (ch == apos || ch == quot) {
160 quote = ch;
161 } else if (ch == endTag) {
162 ++pos;
163 setFormat(start, pos - start, m_formats[Tag]);
164 state = NormalState;
165 break;
166 } else if (text.mid(pos, 2) == endElement) {
167 pos += 2;
168 setFormat(start, pos - start, m_formats[Tag]);
169 state = NormalState;
170 break;
171 } else if (ch != space && text.at(pos) != tab) {
172 // Tag not ending, not a quote and no whitespace, so
173 // we must be dealing with an attribute.
174 ++pos;
175 while (pos < len && text.at(pos) != space
176 && text.at(pos) != tab
177 && text.at(pos) != equals)
178 ++pos;
179 setFormat(start, pos - start, m_formats[Attribute]);
180 start = pos;
181 }
182 } else if (ch == quote) {
183 quote = QChar::Null;
184
185 // Anything quoted is a value
186 setFormat(start, pos - start, m_formats[Value]);
187 }
188 ++pos;
189 }
190 break;
191 }
192 }
193 setCurrentBlockState(state);
194}
195
196} // namespace qdesigner_internal
197
198QT_END_NAMESPACE
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