src/frontends/qt4/QViewSource.C

   1 /**
   2  * \file QViewSource.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author John Levon
   7  * \author Bo Peng
   8  * \author Abdelrazak Younes
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #include <config.h>
  14
  15 #include "QViewSource.h"
  16 #include "QViewSourceDialog.h"
  17 #include "qt_helpers.h"
  18
  19 namespace lyx {
  20 namespace frontend {
  21
  22
  23 latexHighlighter::latexHighlighter(QTextDocument * parent) :
  24         QSyntaxHighlighter(parent)
  25 {
  26         keywordFormat.setForeground(Qt::darkBlue);
  27         keywordFormat.setFontWeight(QFont::Bold);
  28         commentFormat.setForeground(Qt::darkGray);
  29         mathFormat.setForeground(Qt::red);
  30 }
  31
  32
  33 void latexHighlighter::highlightBlock(QString const & text)
  34 {
  35         // $ $
  36         QRegExp exprMath("\\$[^\\$]*\\$");
  37         int index = text.indexOf(exprMath);
  38         while (index >= 0) {
  39                 int length = exprMath.matchedLength();
  40                 setFormat(index, length, mathFormat);
  41                 index = text.indexOf(exprMath, index + length);
  42         }
  43         // [ ]
  44         QRegExp exprStartDispMath("(\\\\\\[|"
  45                 "\\\\begin\\{equation\\**\\}|"
  46                 "\\\\begin\\{eqnarray\\**\\}|"
  47                 "\\\\begin\\{align(ed|at)*\\**\\}|"
  48                 "\\\\begin\\{flalign\\**\\}|"
  49                 "\\\\begin\\{gather\\**\\}|"
  50                 "\\\\begin\\{multline\\**\\}|"
  51                 "\\\\begin\\{array\\**\\}|"
  52                 "\\\\begin\\{cases\\**\\}"
  53                 ")");
  54         QRegExp exprEndDispMath("(\\\\\\]|"
  55                 "\\\\end\\{equation\\**\\}|"
  56                 "\\\\end\\{eqnarray\\**\\}|"
  57                 "\\\\end\\{align(ed|at)*\\**\\}|"
  58                 "\\\\end\\{flalign\\**\\}|"
  59                 "\\\\end\\{gather\\**\\}|"
  60                 "\\\\end\\{multline\\**\\}|"
  61                 "\\\\end\\{array\\**\\}|"
  62                 "\\\\end\\{cases\\**\\}"
  63                 ")");
  64         int startIndex = 0;
  65         // if previous block was in 'disp math'
  66         // start search from 0 (for end disp math)
  67         // otherwise, start search from 'begin disp math'
  68         if (previousBlockState() != 1)
  69                 startIndex = text.indexOf(exprStartDispMath);
  70         while (startIndex >= 0) {
  71                 int endIndex = text.indexOf(exprEndDispMath, startIndex);
  72                 int length;
  73                 if (endIndex == -1) {
  74                         setCurrentBlockState(1);
  75                         length = text.length() - startIndex;
  76                 } else {
  77                         length = endIndex - startIndex + exprEndDispMath.matchedLength();
  78                 }
  79                 setFormat(startIndex, length, mathFormat);
  80                 startIndex = text.indexOf(exprStartDispMath, startIndex + length);
  81         }
  82         // \whatever
  83         QRegExp exprKeyword("\\\\[A-Za-z]+");
  84         index = text.indexOf(exprKeyword);
  85         while (index >= 0) {
  86                 int length = exprKeyword.matchedLength();
  87                 setFormat(index, length, keywordFormat);
  88                 index = text.indexOf(exprKeyword, index + length);
  89         }
  90         // comment
  91         QRegExp exprComment("(^|[^\\\\])%.*$");
  92         index = text.indexOf(exprComment);
  93         while (index >= 0) {
  94                 int length = exprComment.matchedLength();
  95                 setFormat(index, length, commentFormat);
  96                 index = text.indexOf(exprComment, index + length);
  97         }
  98 }
  99
 100
 101 QViewSource::QViewSource(Dialog & parent)
 102         : ControlViewSource(parent)
 103 {
 104         document_ = new QTextDocument(this);
 105         // set syntex highlighting
 106         highlighter_ = new latexHighlighter(document_);
 107 }
 108
 109
 110 void QViewSource::update(bool full_source)
 111 {
 112         document_->setPlainText(toqstr(updateContent(full_source)));
 113 }
 114
 115
 116 } // namespace frontend
 117 } // namespace lyx
 118
 119 #include "QViewSource_moc.cpp"