[2] | 1 | /****************************************************************************
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| 2 | **
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[846] | 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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[561] | 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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[2] | 6 | **
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| 7 | ** This file is part of the examples of the Qt Toolkit.
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| 8 | **
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[846] | 9 | ** $QT_BEGIN_LICENSE:BSD$
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| 10 | ** You may use this file under the terms of the BSD license as follows:
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[2] | 11 | **
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[846] | 12 | ** "Redistribution and use in source and binary forms, with or without
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| 13 | ** modification, are permitted provided that the following conditions are
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| 14 | ** met:
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| 15 | ** * Redistributions of source code must retain the above copyright
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| 16 | ** notice, this list of conditions and the following disclaimer.
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| 17 | ** * Redistributions in binary form must reproduce the above copyright
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| 18 | ** notice, this list of conditions and the following disclaimer in
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| 19 | ** the documentation and/or other materials provided with the
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| 20 | ** distribution.
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| 21 | ** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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| 22 | ** the names of its contributors may be used to endorse or promote
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| 23 | ** products derived from this software without specific prior written
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| 24 | ** permission.
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[2] | 25 | **
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[846] | 26 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 27 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 28 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 29 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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| 30 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 31 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 32 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 33 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 34 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 35 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 36 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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[2] | 37 | ** $QT_END_LICENSE$
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| 38 | **
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| 39 | ****************************************************************************/
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| 40 |
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| 41 | #include <QtGui>
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| 42 |
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| 43 | #include "highlighter.h"
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| 44 |
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| 45 | //! [0]
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| 46 | Highlighter::Highlighter(QTextDocument *parent)
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| 47 | : QSyntaxHighlighter(parent)
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| 48 | {
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| 49 | HighlightingRule rule;
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| 50 |
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| 51 | keywordFormat.setForeground(Qt::darkBlue);
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| 52 | keywordFormat.setFontWeight(QFont::Bold);
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| 53 | QStringList keywordPatterns;
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| 54 | keywordPatterns << "\\bchar\\b" << "\\bclass\\b" << "\\bconst\\b"
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| 55 | << "\\bdouble\\b" << "\\benum\\b" << "\\bexplicit\\b"
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| 56 | << "\\bfriend\\b" << "\\binline\\b" << "\\bint\\b"
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| 57 | << "\\blong\\b" << "\\bnamespace\\b" << "\\boperator\\b"
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| 58 | << "\\bprivate\\b" << "\\bprotected\\b" << "\\bpublic\\b"
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| 59 | << "\\bshort\\b" << "\\bsignals\\b" << "\\bsigned\\b"
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| 60 | << "\\bslots\\b" << "\\bstatic\\b" << "\\bstruct\\b"
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| 61 | << "\\btemplate\\b" << "\\btypedef\\b" << "\\btypename\\b"
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| 62 | << "\\bunion\\b" << "\\bunsigned\\b" << "\\bvirtual\\b"
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| 63 | << "\\bvoid\\b" << "\\bvolatile\\b";
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| 64 | foreach (const QString &pattern, keywordPatterns) {
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| 65 | rule.pattern = QRegExp(pattern);
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| 66 | rule.format = keywordFormat;
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| 67 | highlightingRules.append(rule);
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| 68 | //! [0] //! [1]
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| 69 | }
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| 70 | //! [1]
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| 71 |
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| 72 | //! [2]
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| 73 | classFormat.setFontWeight(QFont::Bold);
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| 74 | classFormat.setForeground(Qt::darkMagenta);
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| 75 | rule.pattern = QRegExp("\\bQ[A-Za-z]+\\b");
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| 76 | rule.format = classFormat;
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| 77 | highlightingRules.append(rule);
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| 78 | //! [2]
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| 79 |
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| 80 | //! [3]
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| 81 | singleLineCommentFormat.setForeground(Qt::red);
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| 82 | rule.pattern = QRegExp("//[^\n]*");
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| 83 | rule.format = singleLineCommentFormat;
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| 84 | highlightingRules.append(rule);
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| 85 |
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| 86 | multiLineCommentFormat.setForeground(Qt::red);
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| 87 | //! [3]
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| 88 |
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| 89 | //! [4]
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| 90 | quotationFormat.setForeground(Qt::darkGreen);
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| 91 | rule.pattern = QRegExp("\".*\"");
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| 92 | rule.format = quotationFormat;
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| 93 | highlightingRules.append(rule);
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| 94 | //! [4]
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| 95 |
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| 96 | //! [5]
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| 97 | functionFormat.setFontItalic(true);
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| 98 | functionFormat.setForeground(Qt::blue);
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| 99 | rule.pattern = QRegExp("\\b[A-Za-z0-9_]+(?=\\()");
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| 100 | rule.format = functionFormat;
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| 101 | highlightingRules.append(rule);
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| 102 | //! [5]
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| 103 |
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| 104 | //! [6]
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| 105 | commentStartExpression = QRegExp("/\\*");
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| 106 | commentEndExpression = QRegExp("\\*/");
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| 107 | }
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| 108 | //! [6]
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| 109 |
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| 110 | //! [7]
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| 111 | void Highlighter::highlightBlock(const QString &text)
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| 112 | {
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| 113 | foreach (const HighlightingRule &rule, highlightingRules) {
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| 114 | QRegExp expression(rule.pattern);
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| 115 | int index = expression.indexIn(text);
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| 116 | while (index >= 0) {
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| 117 | int length = expression.matchedLength();
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| 118 | setFormat(index, length, rule.format);
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| 119 | index = expression.indexIn(text, index + length);
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| 120 | }
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| 121 | }
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| 122 | //! [7] //! [8]
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| 123 | setCurrentBlockState(0);
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| 124 | //! [8]
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| 125 |
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| 126 | //! [9]
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| 127 | int startIndex = 0;
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| 128 | if (previousBlockState() != 1)
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| 129 | startIndex = commentStartExpression.indexIn(text);
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| 130 |
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| 131 | //! [9] //! [10]
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| 132 | while (startIndex >= 0) {
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| 133 | //! [10] //! [11]
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| 134 | int endIndex = commentEndExpression.indexIn(text, startIndex);
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| 135 | int commentLength;
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| 136 | if (endIndex == -1) {
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| 137 | setCurrentBlockState(1);
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| 138 | commentLength = text.length() - startIndex;
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| 139 | } else {
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| 140 | commentLength = endIndex - startIndex
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| 141 | + commentEndExpression.matchedLength();
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| 142 | }
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| 143 | setFormat(startIndex, commentLength, multiLineCommentFormat);
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| 144 | startIndex = commentStartExpression.indexIn(text, startIndex + commentLength);
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| 145 | }
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| 146 | }
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| 147 | //! [11]
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