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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the documentation of Qt for Python.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

//! [0]
editor = QTextEdit()
highlighter = MyHighlighter(editor.document())
//! [0]


//! [1]
class MyHighlighter(QSyntaxHighlighter):
    def highlightBlock(self, text):
        myClassFormat = QTextCharFormat()
        myClassFormat.setFontWeight(QFont.Bold)
        myClassFormat.setForeground(Qt.darkMagenta)
        pattern = QString("\\bMy[A-Za-z]+\\b")

        expression = QRegExp(pattern)
        index = text.indexOf(expression)
        while index >= 0:
            length = expression.matchedLength()
            setFormat(index, length, myClassFormat)
            index = text.indexOf(expression, index + length)
//! [1]


//! [2]
multiLineCommentFormat = QTextCharFormat()
multiLineCommentFormat.setForeground(Qt.red)

startExpression = QRegExp("/\\*")
endExpression = QRegExp("\\*/")

setCurrentBlockState(0)

startIndex = 0
if previousBlockState() != 1:
    startIndex = text.indexOf(startExpression)

while startIndex >= 0:
    endIndex = text.indexOf(endExpression, startIndex)
    if endIndex == -1:
       setCurrentBlockState(1)
       commentLength = text.length() - startIndex
    else:
       commentLength = endIndex - startIndex
                       + endExpression.matchedLength()

    setFormat(startIndex, commentLength, multiLineCommentFormat)
    startIndex = text.indexOf(startExpression,
                              startIndex + commentLength)
//! [2]


//! [3]
class MyHighlighter(QSyntaxHighlighter):
    def highlightBlock(self, text):
        myClassFormat = QTextCharFormat()
        myClassFormat.setFontWeight(QFont.Bold)
        myClassFormat.setForeground(Qt.darkMagenta)
        pattern = QString("\\bMy[A-Za-z]+\\b")

        expression = QRegExp(pattern)
        index = text.indexOf(expression)
        while index >= 0:
            length = expression.matchedLength()
            setFormat(index, length, myClassFormat)
            index = text.indexOf(expression, index + length)
//! [3]


//! [4]
class BlockData(QTextBlockUserData):
    def __init__(self):
        # ...
        self.parentheses = []
//! [4]