File indexing completed on 2023-05-30 09:03:10

 /*
     SPDX-License-Identifier: GPL-2.0-or-later
     SPDX-FileCopyrightText: 2009-2012 Alexander Rieder <alexanderrieder@gmail.com>
 */
 
 #include "maximahighlighter.h"
 #include "maximakeywords.h"
 #include "maximasession.h"
 #include "maximavariablemodel.h"
 
 MaximaHighlighter::MaximaHighlighter(QObject* parent, MaximaSession* session)
     : Cantor::DefaultHighlighter(parent, session)
 {
     //addRule(QRegExp("\\b[A-Za-z0-9_]+(?=\\()"), functionFormat());
 
     //Code highlighting the different keywords
     addKeywords(MaximaKeywords::instance()->keywords());
 
     addRule(QLatin1String("FIXME"), commentFormat());
     addRule(QLatin1String("TODO"), commentFormat());
 
     addFunctions(MaximaKeywords::instance()->functions());
     addVariables(MaximaKeywords::instance()->variables());
 
     //addRule(QRegExp("\".*\""), stringFormat());
     //addRule(QRegExp("'.*'"), stringFormat());
 
     commentStartExpression = QRegularExpression(QStringLiteral("/\\*"));
     commentEndExpression = QRegularExpression(QStringLiteral("\\*/"));
 }
 
 void MaximaHighlighter::highlightBlock(const QString& text)
 {
     if (skipHighlighting(text))
         return;
 
     //Do some backend independent highlighting (brackets etc.)
     DefaultHighlighter::highlightBlock(text);
 
     setCurrentBlockState(-1);
 
     int commentLevel = 0;
     bool inString = false;
     int startIndex = -1;
 
     if (previousBlockState() > 0) {
         commentLevel = previousBlockState();
         startIndex = 0;
     } else if (previousBlockState() < -1) {
         inString = true;
         startIndex = 0;
     }
 
     for (int i = 0; i < text.size(); ++i) {
         if (text[i] == QLatin1Char('\\')) {
             ++i; // skip the next character
         } else if (text[i] == QLatin1Char('"') && commentLevel == 0) {
             if (!inString)
                 startIndex = i;
             else
                 setFormat(startIndex, i - startIndex + 1, stringFormat());
             inString = !inString;
         } else if (text.mid(i,2) == QLatin1String("/*") && !inString) {
             if (commentLevel == 0)
                 startIndex = i;
             ++commentLevel;
             ++i;
         } else if (text.mid(i,2) == QLatin1String("*/") && !inString) {
             if (commentLevel == 0) {
                 setFormat(i, 2, errorFormat());
                 // undo the --commentLevel below, so we stay at 0
                 ++commentLevel;
             } else if (commentLevel == 1) {
                 setFormat(startIndex, i - startIndex + 2, commentFormat());
             }
             ++i;
             --commentLevel;
         }
     }
 
     if (inString) {
         setCurrentBlockState(-2);
         setFormat(startIndex, text.size() - startIndex, stringFormat());
     } else if (commentLevel > 0) {
         setCurrentBlockState(commentLevel);
         setFormat(startIndex, text.size() - startIndex, commentFormat());
     }
 }
 
 QString MaximaHighlighter::nonSeparatingCharacters() const
 {
     return QLatin1String("%");
 }