diff options
Diffstat (limited to 'src/highlighter.cc')
| -rw-r--r-- | src/highlighter.cc | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/src/highlighter.cc b/src/highlighter.cc new file mode 100644 index 0000000..37259f6 --- /dev/null +++ b/src/highlighter.cc @@ -0,0 +1,145 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#include "highlighter.h" + +Highlighter::Highlighter(QTextDocument *parent) + : QSyntaxHighlighter(parent) +{ + HighlightingRule rule; + + keywordFormat.setForeground(Qt::darkBlue); + keywordFormat.setFontWeight(QFont::Bold); + QStringList keywordPatterns; + + // Lua keywords + keywordPatterns << "\\band\\b" << "\\bbreak\\b" << "\\bdo\\b" + << "\\belse\\b" << "\\belseif\\b" + << "\\bend\\b" << "\\bfalse\\b" << "\\bfor\\b" + << "\\bfunction\\b" << "\\bif\\b" + << "\\bin\\b" << "\\blocal\\b" << "\\bnil\\b" + << "\\bnot\\b" << "\\bor\\b" + << "\\brepeat\\b"<< "\\breturn\\b" << "\\bthen\\b" + << "\\btrue\\b" << "\\buntil\\b" << "\\bwhile\\b"; + foreach(const 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::red); + rule.pattern = QRegularExpression("--[^\n]*"); + rule.format = singleLineCommentFormat; + highlightingRules.append(rule); + + multiLineCommentFormat.setForeground(Qt::red); + + 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) +{ + foreach (const HighlightingRule &rule, highlightingRules) + { + QRegularExpressionMatchIterator matchIterator = + rule.pattern.globalMatch(text); + while(matchIterator.hasNext()) + { + QRegularExpressionMatch match = matchIterator.next(); + setFormat(match.capturedStart(), match.capturedLength(), rule.format); + } + } + setCurrentBlockState(0); + + int startIndex = 0; + if(previousBlockState() != 1) + { + startIndex = text.indexOf(commentStartExpression); + } + + while(startIndex >= 0) + { + QRegularExpressionMatch match = + commentEndExpression.match(text, startIndex); + int endIndex = match.capturedStart(); + int commentLength = 0; + if(endIndex == -1) + { + setCurrentBlockState(1); + commentLength = text.length() - startIndex; + } + else + { + commentLength = endIndex - startIndex + + match.capturedLength(); + } + setFormat(startIndex, commentLength, multiLineCommentFormat); + startIndex = text.indexOf(commentStartExpression, + startIndex + commentLength); + } +} |