146 lines
5.3 KiB
C++
146 lines
5.3 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
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** of its contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "highlighter.h"
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//! [0]
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Highlighter::Highlighter(QTextDocument *parent)
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: QSyntaxHighlighter(parent)
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{
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HighlightingRule rule;
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keywordFormat.setForeground(Qt::darkBlue);
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keywordFormat.setFontWeight(QFont::Bold);
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QStringList keywordPatterns;
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keywordPatterns << "\\bchar\\b" << "\\bclass\\b" << "\\bconst\\b"
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<< "\\bdouble\\b" << "\\benum\\b" << "\\bexplicit\\b"
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<< "\\bfriend\\b" << "\\binline\\b" << "\\bint\\b"
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<< "\\blong\\b" << "\\bnamespace\\b" << "\\boperator\\b"
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<< "\\bprivate\\b" << "\\bprotected\\b" << "\\bpublic\\b"
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<< "\\bshort\\b" << "\\bsignals\\b" << "\\bsigned\\b"
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<< "\\bslots\\b" << "\\bstatic\\b" << "\\bstruct\\b"
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<< "\\btemplate\\b" << "\\btypedef\\b" << "\\btypename\\b"
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<< "\\bunion\\b" << "\\bunsigned\\b" << "\\bvirtual\\b"
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<< "\\bvoid\\b" << "\\bvolatile\\b";
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foreach (const QString &pattern, keywordPatterns) {
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rule.pattern = QRegExp(pattern);
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rule.format = keywordFormat;
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highlightingRules.append(rule);
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//! [0] //! [1]
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}
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//! [1]
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//! [2]
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classFormat.setFontWeight(QFont::Bold);
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classFormat.setForeground(Qt::darkMagenta);
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rule.pattern = QRegExp("\\bQ[A-Za-z]+\\b");
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rule.format = classFormat;
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highlightingRules.append(rule);
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//! [2]
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//! [3]
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singleLineCommentFormat.setForeground(Qt::red);
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rule.pattern = QRegExp("//[^\n]*");
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rule.format = singleLineCommentFormat;
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highlightingRules.append(rule);
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multiLineCommentFormat.setForeground(Qt::red);
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//! [3]
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//! [4]
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quotationFormat.setForeground(Qt::darkGreen);
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rule.pattern = QRegExp("\".*\"");
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rule.format = quotationFormat;
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highlightingRules.append(rule);
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//! [4]
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//! [5]
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functionFormat.setFontItalic(true);
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functionFormat.setForeground(Qt::blue);
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rule.pattern = QRegExp("\\b[A-Za-z0-9_]+(?=\\()");
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rule.format = functionFormat;
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highlightingRules.append(rule);
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//! [5]
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//! [6]
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commentStartExpression = QRegExp("/\\*");
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commentEndExpression = QRegExp("\\*/");
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}
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//! [6]
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//! [7]
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void Highlighter::highlightBlock(const QString &text)
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{
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foreach (const HighlightingRule &rule, highlightingRules) {
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QRegExp expression(rule.pattern);
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int index = expression.indexIn(text);
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while (index >= 0) {
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int length = expression.matchedLength();
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setFormat(index, length, rule.format);
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index = expression.indexIn(text, index + length);
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}
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}
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//! [7] //! [8]
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setCurrentBlockState(0);
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//! [8]
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//! [9]
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int startIndex = 0;
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if (previousBlockState() != 1)
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startIndex = commentStartExpression.indexIn(text);
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//! [9] //! [10]
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while (startIndex >= 0) {
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//! [10] //! [11]
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int endIndex = commentEndExpression.indexIn(text, startIndex);
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int commentLength;
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if (endIndex == -1) {
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setCurrentBlockState(1);
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commentLength = text.length() - startIndex;
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} else {
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commentLength = endIndex - startIndex
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+ commentEndExpression.matchedLength();
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}
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setFormat(startIndex, commentLength, multiLineCommentFormat);
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startIndex = commentStartExpression.indexIn(text, startIndex + commentLength);
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}
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}
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//! [11]
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