--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/richtext/syntaxhighlighter/highlighter.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,148 @@
+/****************************************************************************
+**
+** 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 <QtGui>
+
+#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]