/**************************************************************************** ** ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** No Commercial Usage ** This file contains pre-release code and may not be distributed. ** You may use this file in accordance with the terms and conditions ** contained in the Technology Preview License Agreement accompanying ** this package. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain additional ** rights. These rights are described in the Nokia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** ** ** ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include #include "highlighter.h" //! [0] Highlighter::Highlighter(QTextDocument *parent) : QSyntaxHighlighter(parent) { HighlightingRule rule; keywordFormat.setForeground(Qt::darkBlue); keywordFormat.setFontWeight(QFont::Bold); QStringList keywordPatterns; keywordPatterns << "\\bchar\\b" << "\\bclass\\b" << "\\bconst\\b" << "\\bdouble\\b" << "\\benum\\b" << "\\bexplicit\\b" << "\\bfriend\\b" << "\\binline\\b" << "\\bint\\b" << "\\blong\\b" << "\\bnamespace\\b" << "\\boperator\\b" << "\\bprivate\\b" << "\\bprotected\\b" << "\\bpublic\\b" << "\\bshort\\b" << "\\bsignals\\b" << "\\bsigned\\b" << "\\bslots\\b" << "\\bstatic\\b" << "\\bstruct\\b" << "\\btemplate\\b" << "\\btypedef\\b" << "\\btypename\\b" << "\\bunion\\b" << "\\bunsigned\\b" << "\\bvirtual\\b" << "\\bvoid\\b" << "\\bvolatile\\b"; foreach (const QString &pattern, keywordPatterns) { rule.pattern = QRegExp(pattern); rule.format = keywordFormat; highlightingRules.append(rule); //! [0] //! [1] } //! [1] //! [2] classFormat.setFontWeight(QFont::Bold); classFormat.setForeground(Qt::darkMagenta); rule.pattern = QRegExp("\\bQ[A-Za-z]+\\b"); rule.format = classFormat; highlightingRules.append(rule); //! [2] //! [3] singleLineCommentFormat.setForeground(Qt::red); rule.pattern = QRegExp("//[^\n]*"); rule.format = singleLineCommentFormat; highlightingRules.append(rule); multiLineCommentFormat.setForeground(Qt::red); //! [3] //! [4] quotationFormat.setForeground(Qt::darkGreen); rule.pattern = QRegExp("\".*\""); rule.format = quotationFormat; highlightingRules.append(rule); //! [4] //! [5] functionFormat.setFontItalic(true); functionFormat.setForeground(Qt::blue); rule.pattern = QRegExp("\\b[A-Za-z0-9_]+(?=\\()"); rule.format = functionFormat; highlightingRules.append(rule); //! [5] //! [6] commentStartExpression = QRegExp("/\\*"); commentEndExpression = QRegExp("\\*/"); } //! [6] //! [7] void Highlighter::highlightBlock(const QString &text) { foreach (const HighlightingRule &rule, highlightingRules) { QRegExp expression(rule.pattern); int index = expression.indexIn(text); while (index >= 0) { int length = expression.matchedLength(); setFormat(index, length, rule.format); index = expression.indexIn(text, index + length); } } //! [7] //! [8] setCurrentBlockState(0); //! [8] //! [9] int startIndex = 0; if (previousBlockState() != 1) startIndex = commentStartExpression.indexIn(text); //! [9] //! [10] while (startIndex >= 0) { //! [10] //! [11] int endIndex = commentEndExpression.indexIn(text, startIndex); int commentLength; if (endIndex == -1) { setCurrentBlockState(1); commentLength = text.length() - startIndex; } else { commentLength = endIndex - startIndex + commentEndExpression.matchedLength(); } setFormat(startIndex, commentLength, multiLineCommentFormat); startIndex = commentStartExpression.indexIn(text, startIndex + commentLength); } } //! [11]