source: trunk/examples/richtext/syntaxhighlighter/highlighter.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: 5.3 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the examples of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:BSD$
10** You may use this file under the terms of the BSD license as follows:
11**
12** "Redistribution and use in source and binary forms, with or without
13** modification, are permitted provided that the following conditions are
14** met:
15** * Redistributions of source code must retain the above copyright
16** notice, this list of conditions and the following disclaimer.
17** * Redistributions in binary form must reproduce the above copyright
18** notice, this list of conditions and the following disclaimer in
19** the documentation and/or other materials provided with the
20** distribution.
21** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
22** the names of its contributors may be used to endorse or promote
23** products derived from this software without specific prior written
24** permission.
25**
26** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
37** $QT_END_LICENSE$
38**
39****************************************************************************/
40
41#include <QtGui>
42
43#include "highlighter.h"
44
45//! [0]
46Highlighter::Highlighter(QTextDocument *parent)
47 : QSyntaxHighlighter(parent)
48{
49 HighlightingRule rule;
50
51 keywordFormat.setForeground(Qt::darkBlue);
52 keywordFormat.setFontWeight(QFont::Bold);
53 QStringList keywordPatterns;
54 keywordPatterns << "\\bchar\\b" << "\\bclass\\b" << "\\bconst\\b"
55 << "\\bdouble\\b" << "\\benum\\b" << "\\bexplicit\\b"
56 << "\\bfriend\\b" << "\\binline\\b" << "\\bint\\b"
57 << "\\blong\\b" << "\\bnamespace\\b" << "\\boperator\\b"
58 << "\\bprivate\\b" << "\\bprotected\\b" << "\\bpublic\\b"
59 << "\\bshort\\b" << "\\bsignals\\b" << "\\bsigned\\b"
60 << "\\bslots\\b" << "\\bstatic\\b" << "\\bstruct\\b"
61 << "\\btemplate\\b" << "\\btypedef\\b" << "\\btypename\\b"
62 << "\\bunion\\b" << "\\bunsigned\\b" << "\\bvirtual\\b"
63 << "\\bvoid\\b" << "\\bvolatile\\b";
64 foreach (const QString &pattern, keywordPatterns) {
65 rule.pattern = QRegExp(pattern);
66 rule.format = keywordFormat;
67 highlightingRules.append(rule);
68//! [0] //! [1]
69 }
70//! [1]
71
72//! [2]
73 classFormat.setFontWeight(QFont::Bold);
74 classFormat.setForeground(Qt::darkMagenta);
75 rule.pattern = QRegExp("\\bQ[A-Za-z]+\\b");
76 rule.format = classFormat;
77 highlightingRules.append(rule);
78//! [2]
79
80//! [3]
81 singleLineCommentFormat.setForeground(Qt::red);
82 rule.pattern = QRegExp("//[^\n]*");
83 rule.format = singleLineCommentFormat;
84 highlightingRules.append(rule);
85
86 multiLineCommentFormat.setForeground(Qt::red);
87//! [3]
88
89//! [4]
90 quotationFormat.setForeground(Qt::darkGreen);
91 rule.pattern = QRegExp("\".*\"");
92 rule.format = quotationFormat;
93 highlightingRules.append(rule);
94//! [4]
95
96//! [5]
97 functionFormat.setFontItalic(true);
98 functionFormat.setForeground(Qt::blue);
99 rule.pattern = QRegExp("\\b[A-Za-z0-9_]+(?=\\()");
100 rule.format = functionFormat;
101 highlightingRules.append(rule);
102//! [5]
103
104//! [6]
105 commentStartExpression = QRegExp("/\\*");
106 commentEndExpression = QRegExp("\\*/");
107}
108//! [6]
109
110//! [7]
111void Highlighter::highlightBlock(const QString &text)
112{
113 foreach (const HighlightingRule &rule, highlightingRules) {
114 QRegExp expression(rule.pattern);
115 int index = expression.indexIn(text);
116 while (index >= 0) {
117 int length = expression.matchedLength();
118 setFormat(index, length, rule.format);
119 index = expression.indexIn(text, index + length);
120 }
121 }