File indexing completed on 2024-05-12 05:40:38

 /***************************************************************************
  * Copyright (C) 2014-2018 by Renaud Guezennec                              *
  * https://rolisteam.org/                                                *
  * Copyright (c) 2014-2018 Patrizio Bekerle -- http://www.bekerle.com       *
  *                                                                          *
  *  This file is part of rcse                                               *
  *                                                                          *
  * rcse is free software; you can redistribute it and/or modify             *
  * it under the terms of the GNU General Public License as published by     *
  * the Free Software Foundation; either version 2 of the License, or        *
  * (at your option) any later version.                                      *
  *                                                                          *
  * rcse is distributed in the hope that it will be useful,                  *
  * but WITHOUT ANY WARRANTY; without even the implied warranty of           *
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the             *
  * GNU General Public License for more details.                             *
  *                                                                          *
  * You should have received a copy of the GNU General Public License        *
  * along with this program; if not, write to the                            *
  * Free Software Foundation, Inc.,                                          *
  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.                 *
  ***************************************************************************/
 
 #ifndef MARKDOWNHIGHLIGHTER_H
 #define MARKDOWNHIGHLIGHTER_H
 
 #include "rwidgets_global.h"
 #include <QRegularExpression>
 #include <QSyntaxHighlighter>
 #include <QTextCharFormat>
 
 class QTextDocument;
 class QTimer;
 
 class RWIDGET_EXPORT MarkDownHighlighter : public QSyntaxHighlighter
 {
     Q_OBJECT
 
 public:
     enum HighlightingOption
     {
         None= 0,
         FullyHighlightedBlockQuote= 0x01
     };
     Q_DECLARE_FLAGS(HighlightingOptions, HighlightingOption)
 
     MarkDownHighlighter(QTextDocument* parent= nullptr,
                         HighlightingOptions highlightingOptions= HighlightingOption::FullyHighlightedBlockQuote);
 
     // we use some predefined numbers here to be compatible with
     // the peg-markdown parser
     enum HighlighterState
     {
         NoState= -1,
         Link= 0,
         Image= 3,
         CodeBlock,
         Italic= 7,
         Bold,
         List,
         Comment= 11,
         H1,
         H2,
         H3,
         H4,
         H5,
         H6,
         BlockQuote,
         HorizontalRuler= 21,
         Table,
         InlineCodeBlock,
         MaskedSyntax,
         CurrentLineBackgroundColor,
         BrokenLink,
 
         // internal
         CodeBlockEnd= 100,
         HeadlineEnd
     };
 
     void setTextFormats(QHash<HighlighterState, QTextCharFormat> formats);
     void setTextFormat(HighlighterState state, QTextCharFormat format);
     void clearDirtyBlocks();
     void setHighlightingOptions(HighlightingOptions options);
     void initHighlightingRules();
 
 signals:
     void highlightingFinished();
 
 protected slots:
     void timerTick();
 
 protected:
     struct HighlightingRule
     {
         QRegularExpression pattern;
         HighlighterState state;
         int capturingGroup;
         int maskedGroup;
         bool useStateAsCurrentBlockState;
         bool disableIfCurrentStateIsSet;
     };
 
     void highlightBlock(const QString& text) Q_DECL_OVERRIDE;
 
     void initTextFormats(int defaultFontSize= 12);
 
     void highlightMarkdown(QString text);
 
     void highlightHeadline(QString text);
 
     void highlightAdditionalRules(QVector<HighlightingRule>& rules, QString text);
 
     void highlightCodeBlock(QString text);
 
     void highlightCommentBlock(QString text);
 
     void addDirtyBlock(QTextBlock block);
 
     void reHighlightDirtyBlocks();
     void setCurrentBlockMargin(HighlighterState state);
 
 private:
     QVector<HighlightingRule> m_highlightingRulesPre;
     QVector<HighlightingRule> m_highlightingRulesAfter;
     QVector<QTextBlock> m_dirtyTextBlocks;
     QHash<HighlighterState, QTextCharFormat> m_formats;
     QTimer* m_timer;
     bool m_highlightingFinished;
     HighlightingOptions m_highlightingOptions;
 };
 #endif // MARKDOWNHIGHLIGHTER_H