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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++ #include <QChar>
++ #include <QList>
++ #include <QRegularExpression>
++ #include <QSyntaxHighlighter>
++ #include <QTextBlockUserData>
++ #include <QTextEdit>
++ #include <QTextObject>
++
++ namespace src_gui_text_qsyntaxhighlighter {
++ struct MyHighlighter : public QSyntaxHighlighter
++ {
++ explicit MyHighlighter(QTextDocument *document) : QSyntaxHighlighter(document) { Q_UNUSED(document); }
++
++ void highlightBlock(const QString &text);
++ void wrapper();
++
++ QString text;
++ };
++
++ //! [0]
++ QTextEdit *editor = new QTextEdit;
++ MyHighlighter *highlighter = new MyHighlighter(editor->document());
++ //! [0]
++
++
++ //! [1]
++ void MyHighlighter::highlightBlock(const QString &text)
++ {
++ QTextCharFormat myClassFormat;
++ myClassFormat.setFontWeight(QFont::Bold);
++ myClassFormat.setForeground(Qt::darkMagenta);
++
++ QRegularExpression expression("\\bMy[A-Za-z]+\\b");
++ QRegularExpressionMatchIterator i = expression.globalMatch(text);
++ while (i.hasNext()) {
++ QRegularExpressionMatch match = i.next();
++ setFormat(match.capturedStart(), match.capturedLength(), myClassFormat);
++ }
++ }
++ //! [1]
++
++ void MyHighlighter::wrapper() {
++ //! [2]
++ QTextCharFormat multiLineCommentFormat;
++ multiLineCommentFormat.setForeground(Qt::red);
++
++ QRegularExpression startExpression("/\\*");
++ QRegularExpression endExpression("\\*/");
++
++ setCurrentBlockState(0);
++
++ int startIndex = 0;
++ if (previousBlockState() != 1)
++ startIndex = text.indexOf(startExpression);
++
++ while (startIndex >= 0) {
++ QRegularExpressionMatch endMatch;
++ int endIndex = text.indexOf(endExpression, startIndex, &endMatch);
++ int commentLength;
++ if (endIndex == -1) {
++ setCurrentBlockState(1);
++ commentLength = text.length() - startIndex;
++ } else {
++ commentLength = endIndex - startIndex
++ + endMatch.capturedLength();
++ }
++ setFormat(startIndex, commentLength, multiLineCommentFormat);
++ startIndex = text.indexOf(startExpression,
++ startIndex + commentLength);
++ }
++ //! [2]
++ } // MyHighlighter::wrapper
++
++
++ //! [3]
++ struct ParenthesisInfo
++ {
++ QChar character;
++ int position;
++ };
++
++ struct BlockData : public QTextBlockUserData
++ {
++ QList<ParenthesisInfo> parentheses;
++ };
++ //! [3]
++
++ } // src_gui_text_qsyntaxhighlighter