libkdepim/kemailquotinghighter.cpp

   1 /**
   2  * kemailquotinghighter.cpp
   3  *
   4  * Copyright (C)  2006  Laurent Montel <montel@kde.org>
   5  * Copyright (C)  2008  Thomas McGuire <mcguire@kde.org>
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20  * 02110-1301  USA
  21  */
  22
  23 #include "kemailquotinghighter.h"
  24
  25 #include <KColorScheme>
  26 #include <KConfig>
  27 #include <KDebug>
  28 #include <KLocale>
  29 #include <sonnet/speller.h>
  30 #include <kdeversion.h>
  31
  32 #include <QTextEdit>
  33 #include <QTimer>
  34 #include <QColor>
  35 #include <QHash>
  36 #include <QTextCursor>
  37
  38 namespace KPIM {
  39 class KEMailQuotingHighlighter::KEmailQuotingHighlighterPrivate
  40 {
  41 public:
  42     QColor col1, col2, col3, misspelledColor;
  43     bool spellCheckingEnabled;
  44 };
  45
  46 KEMailQuotingHighlighter::KEMailQuotingHighlighter( QTextEdit *textEdit,
  47                                                     const QColor &normalColor,
  48                                                     const QColor &quoteDepth1,
  49                                                     const QColor &quoteDepth2,
  50                                                     const QColor &quoteDepth3,
  51                                                     const QColor &misspelledColor )
  52     : Highlighter( textEdit ),
  53       d( new KEmailQuotingHighlighterPrivate() )
  54 {
  55     Q_UNUSED( normalColor );
  56     // Don't automatically disable the spell checker, for example because there
  57     // are too many misspelled words. That would also disable quote highlighting.
  58     setAutomatic( false );
  59
  60     setActive( true );
  61     d->col1 = quoteDepth1;
  62     d->col2 = quoteDepth2;
  63     d->col3 = quoteDepth3;
  64     d->misspelledColor = misspelledColor;
  65     d->spellCheckingEnabled = false;
  66 }
  67
  68 KEMailQuotingHighlighter::~KEMailQuotingHighlighter()
  69 {
  70     delete d;
  71 }
  72
  73 void KEMailQuotingHighlighter::setQuoteColor( const QColor &normalColor,
  74                                               const QColor &quoteDepth1,
  75                                               const QColor &quoteDepth2,
  76                                               const QColor &quoteDepth3,
  77                                               const QColor &misspelledColor )
  78 {
  79     Q_UNUSED( normalColor );
  80     d->col1 = quoteDepth1;
  81     d->col2 = quoteDepth2;
  82     d->col3 = quoteDepth3;
  83     d->misspelledColor = misspelledColor;
  84 }
  85
  86 void KEMailQuotingHighlighter::toggleSpellHighlighting( bool on )
  87 {
  88     if ( on != d->spellCheckingEnabled ) {
  89         d->spellCheckingEnabled = on;
  90         rehighlight();
  91     }
  92 }
  93
  94 void KEMailQuotingHighlighter::highlightBlock( const QString & text )
  95 {
  96     QString simplified = text;
  97     simplified = simplified.replace( QRegExp( "\\s" ), QString() )
  98                            .replace( '|', QLatin1String(">") );
  99     while ( simplified.startsWith( QLatin1String(">>>>") ) )
 100         simplified = simplified.mid( 3 );
 101     if ( simplified.startsWith( QLatin1String(">>>") ) ||
 102          simplified.startsWith( QLatin1String("> > >") ) )
 103         setFormat( 0, text.length(), d->col1 );
 104     else if ( simplified.startsWith( QLatin1String(">>") ) ||
 105               simplified.startsWith( QLatin1String("> >") ) )
 106         setFormat( 0, text.length(), d->col2 );
 107     else if ( simplified.startsWith( QLatin1String(">") ) )
 108         setFormat( 0, text.length(), d->col3 );
 109     else
 110     {
 111         if ( d->spellCheckingEnabled )
 112             Highlighter::highlightBlock( text );
 113     }
 114     setCurrentBlockState( 0 );
 115 }
 116
 117 void KEMailQuotingHighlighter::unsetMisspelled( int start,  int count )
 118 {
 119     Q_UNUSED( start )
 120     Q_UNUSED( count )
 121 }
 122
 123 void KEMailQuotingHighlighter::setMisspelled( int start, int count )
 124 {
 125 #if KDE_IS_VERSION( 4, 1, 63 )
 126     setMisspelledColor( d->misspelledColor );
 127 #endif
 128     Sonnet::Highlighter::setMisspelled( start, count );
 129 }
 130
 131 }