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/****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
#include <QtGui>
#include "highlighter.h"
Highlighter::Highlighter(QTextDocument *parent)
: QSyntaxHighlighter(parent)
{
HighlightingRule rule;
// keywordFormat.setForeground(Qt::darkBlue);
keywordFormat.setFontWeight(QFont::Bold);
QStringList keywordPatterns;
keywordPatterns << "\\bfor\\b" << "\\bif\\b" << "\\bwhile\\b"
<< "\\bdo\\b" << "\\begin\\b" << "\\bfunction\\b"
<< "\\bprocedure\\b";
foreach (QString pattern, keywordPatterns) {
rule.pattern = QRegularExpression(pattern);
rule.format = keywordFormat;
highlightingRules.append(rule);
}
classFormat.setFontWeight(QFont::Bold);
classFormat.setForeground(Qt::darkMagenta);
rule.pattern = QRegularExpression("\\bQ[A-Za-z]+\\b");
rule.format = classFormat;
highlightingRules.append(rule);
singleLineCommentFormat.setForeground(Qt::gray);
rule.pattern = QRegularExpression("//[^\n]*");
rule.format = singleLineCommentFormat;
highlightingRules.append(rule);
multiLineCommentFormat.setForeground(Qt::gray);
quotationFormat.setForeground(Qt::darkGreen);
rule.pattern = QRegularExpression("\".*\"");
rule.format = quotationFormat;
highlightingRules.append(rule);
functionFormat.setFontItalic(true);
functionFormat.setForeground(Qt::blue);
rule.pattern = QRegularExpression("\\b[A-Za-z0-9_]+(?=\\()");
rule.format = functionFormat;
highlightingRules.append(rule);
commentStartExpression = QRegularExpression("/\\*");
commentEndExpression = QRegularExpression("\\*/");
}
void Highlighter::highlightBlock(const QString &text)
{
QRegularExpressionMatch rmatch;
foreach (HighlightingRule rule, highlightingRules) {
QRegularExpression expression(rule.pattern);
int index = text.indexOf(expression, 0, &rmatch);
while (index >= 0) {
int length = rmatch.capturedLength();
setFormat(index, length, rule.format);
index = text.indexOf(expression, index + length);
}
}
setCurrentBlockState(0);
int startIndex = 0;
if (previousBlockState() != 1)
startIndex = text.indexOf(commentStartExpression, 0, &rmatch);
while (startIndex >= 0) {
int endIndex = text.indexOf(commentEndExpression, startIndex, &rmatch);
int commentLength;
if (endIndex == -1) {
setCurrentBlockState(1);
commentLength = text.length() - startIndex;
} else {
commentLength = endIndex - startIndex + rmatch.capturedLength();
// + commentEndExpression.matchedLength();
}
setFormat(startIndex, commentLength, multiLineCommentFormat);
startIndex = text.indexOf(commentStartExpression,
startIndex + commentLength);
}
}
PreviewHighlighter::PreviewHighlighter(QTextDocument *parent, const QString &comment, const QString &delimiter)
: QSyntaxHighlighter(parent)
{
HighlightingRule rule;
if (comment.length() > 0) {
singleLineCommentFormat.setForeground(Qt::gray);
rule.pattern = QRegularExpression("^[" + comment + "][^\n]*");
rule.format = singleLineCommentFormat;
highlightingRules.append(rule);
}
if (delimiter.length() > 0) {
delimiterFormat.setBackground(QBrush(Qt::black, Qt::VerPattern));
QRegularExpression delimiterSyntax(delimiter);
// delimiterSyntax.setPatternSyntax(QRegularExpression::FixedString);
rule.pattern = QRegularExpression(delimiterSyntax);
if (delimiter == " ") rule.pattern = QRegularExpression("[ \t]");
rule.format = delimiterFormat;
highlightingRules.append(rule);
}
}
void PreviewHighlighter::highlightBlock(const QString &text) {
foreach (HighlightingRule rule, highlightingRules) {
QRegularExpressionMatch rmatch;
QRegularExpression expression(rule.pattern);
int index = text.indexOf(expression, 0, &rmatch);
while (index >= 0) {
int length = rmatch.capturedLength();
setFormat(index, length, rule.format);
index = text.indexOf(expression, index + length);
}
}
}
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