Linuxguru

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 (QString pattern, keywordPatterns)	{		rule.pattern = QRegExp(pattern);		rule.format = keywordFormat;		highlightingRules.append(rule);     	}	classFormat.setFontWeight(QFont::Bold);	classFormat.setForeground(Qt::darkMagenta);	rule.pattern = QRegExp("\\bQ[A-Za-z]+\\b");	rule.format = classFormat;	highlightingRules.append(rule);	singleLineCommentFormat.setForeground(Qt::red);	rule.pattern = QRegExp("//[^\n]*");	rule.format = singleLineCommentFormat;	highlightingRules.append(rule);	multiLineCommentFormat.setForeground(Qt::red);	quotationFormat.setForeground(Qt::darkGreen);	rule.pattern = QRegExp("\".*\"");	rule.format = quotationFormat;	highlightingRules.append(rule);	functionFormat.setFontItalic(true);	functionFormat.setForeground(Qt::blue);	rule.pattern = QRegExp("\\b[A-Za-z0-9_]+(?=\\()");	 rule.format = functionFormat;	highlightingRules.append(rule);	commentStartExpression = QRegExp("/\\*");	commentEndExpression = QRegExp("\\*/"); } void Highlighter::highlightBlock(const QString &text) {	foreach (HighlightingRule rule, highlightingRules)	{		QRegExp expression(rule.pattern);		int index = text.indexOf(expression);		while (index >= 0)		{			int length = expression.matchedLength();			setFormat(index, length, rule.format);			index = text.indexOf(expression, index + length);		}	}	setCurrentBlockState(0);	int startIndex = 0;	if (previousBlockState() != 1)	startIndex = text.indexOf(commentStartExpression);	while (startIndex >= 0)	{		int endIndex = text.indexOf(commentEndExpression, startIndex);		int commentLength;		if (endIndex == -1)		{			setCurrentBlockState(1);			commentLength = text.length() - startIndex;		}		else		{			commentLength = endIndex - startIndex + commentEndExpression.matchedLength();		}		setFormat(startIndex, commentLength, multiLineCommentFormat);		startIndex = text.indexOf(commentStartExpression, startIndex + commentLength);	}}