src/frontends/qt4/QViewSource.cpp

   1 /**
   2  * \file QViewSource.cpp
   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 "qt_helpers.h"
  17
  18 #include <QTextDocument>
  19
  20 namespace lyx {
  21 namespace frontend {
  22
  23 /////////////////////////////////////////////////////////////////////
  24 //
  25 // QViewSourceDialog
  26 //
  27 /////////////////////////////////////////////////////////////////////
  28
  29 QViewSourceDialog::QViewSourceDialog(QViewSource * form)
  30         : form_(form)
  31 {
  32         setupUi(this);
  33
  34         connect(viewFullSourceCB, SIGNAL(clicked()),
  35                 this, SLOT(update()));
  36         connect(autoUpdateCB, SIGNAL(toggled(bool)),
  37                 updatePB, SLOT(setDisabled(bool)));
  38         connect(updatePB, SIGNAL(clicked()),
  39                 this, SLOT(update()));
  40
  41         // setting a document at this point trigger an assertion in Qt
  42         // so we disable the signals here:
  43         form_->document()->blockSignals(true);
  44         viewSourceTV->setDocument(form_->document());
  45         form_->document()->blockSignals(false);
  46         viewSourceTV->setReadOnly(true);
  47         ///dialog_->viewSourceTV->setAcceptRichText(false);
  48         // this is personal. I think source code should be in fixed-size font
  49         QFont font(toqstr(theApp()->typewriterFontName()));
  50         font.setKerning(false);
  51         font.setFixedPitch(true);
  52         font.setStyleHint(QFont::TypeWriter);
  53         viewSourceTV->setFont(font);
  54         // again, personal taste
  55         viewSourceTV->setWordWrapMode(QTextOption::NoWrap);
  56 }
  57
  58
  59 void QViewSourceDialog::update()
  60 {
  61         if (autoUpdateCB->isChecked())
  62                 form_->update(viewFullSourceCB->isChecked());
  63
  64         QWidget::update();
  65 }
  66
  67
  68 /////////////////////////////////////////////////////////////////////
  69 //
  70 // LaTeXHighlighter
  71 //
  72 /////////////////////////////////////////////////////////////////////
  73
  74
  75 LaTeXHighlighter::LaTeXHighlighter(QTextDocument * parent)
  76         : QSyntaxHighlighter(parent)
  77 {
  78         keywordFormat.setForeground(Qt::darkBlue);
  79         keywordFormat.setFontWeight(QFont::Bold);
  80         commentFormat.setForeground(Qt::darkGray);
  81         mathFormat.setForeground(Qt::red);
  82 }
  83
  84
  85 void LaTeXHighlighter::highlightBlock(QString const & text)
  86 {
  87         // $ $
  88         QRegExp exprMath("\\$[^\\$]*\\$");
  89         int index = text.indexOf(exprMath);
  90         while (index >= 0) {
  91                 int length = exprMath.matchedLength();
  92                 setFormat(index, length, mathFormat);
  93                 index = text.indexOf(exprMath, index + length);
  94         }
  95         // [ ]
  96         QRegExp exprStartDispMath("(\\\\\\[|"
  97                 "\\\\begin\\{equation\\**\\}|"
  98                 "\\\\begin\\{eqnarray\\**\\}|"
  99                 "\\\\begin\\{align(ed|at)*\\**\\}|"
 100                 "\\\\begin\\{flalign\\**\\}|"
 101                 "\\\\begin\\{gather\\**\\}|"
 102                 "\\\\begin\\{multline\\**\\}|"
 103                 "\\\\begin\\{array\\**\\}|"
 104                 "\\\\begin\\{cases\\**\\}"
 105                 ")");
 106         QRegExp exprEndDispMath("(\\\\\\]|"
 107                 "\\\\end\\{equation\\**\\}|"
 108                 "\\\\end\\{eqnarray\\**\\}|"
 109                 "\\\\end\\{align(ed|at)*\\**\\}|"
 110                 "\\\\end\\{flalign\\**\\}|"
 111                 "\\\\end\\{gather\\**\\}|"
 112                 "\\\\end\\{multline\\**\\}|"
 113                 "\\\\end\\{array\\**\\}|"
 114                 "\\\\end\\{cases\\**\\}"
 115                 ")");
 116         int startIndex = 0;
 117         // if previous block was in 'disp math'
 118         // start search from 0 (for end disp math)
 119         // otherwise, start search from 'begin disp math'
 120         if (previousBlockState() != 1)
 121                 startIndex = text.indexOf(exprStartDispMath);
 122         while (startIndex >= 0) {
 123                 int endIndex = text.indexOf(exprEndDispMath, startIndex);
 124                 int length;
 125                 if (endIndex == -1) {
 126                         setCurrentBlockState(1);
 127                         length = text.length() - startIndex;
 128                 } else {
 129                         length = endIndex - startIndex + exprEndDispMath.matchedLength();
 130                 }
 131                 setFormat(startIndex, length, mathFormat);
 132                 startIndex = text.indexOf(exprStartDispMath, startIndex + length);
 133         }
 134         // \whatever
 135         QRegExp exprKeyword("\\\\[A-Za-z]+");
 136         index = text.indexOf(exprKeyword);
 137         while (index >= 0) {
 138                 int length = exprKeyword.matchedLength();
 139                 setFormat(index, length, keywordFormat);
 140                 index = text.indexOf(exprKeyword, index + length);
 141         }
 142         // comment
 143         QRegExp exprComment("(^|[^\\\\])%.*$");
 144         index = text.indexOf(exprComment);
 145         while (index >= 0) {
 146                 int const length = exprComment.matchedLength();
 147                 setFormat(index, length, commentFormat);
 148                 index = text.indexOf(exprComment, index + length);
 149         }
 150 }
 151
 152
 153 QViewSource::QViewSource(Dialog & parent)
 154         : ControlViewSource(parent)
 155 {
 156         document_ = new QTextDocument(this);
 157         highlighter_ = new LaTeXHighlighter(document_);
 158 }
 159
 160
 161 /////////////////////////////////////////////////////////////////////
 162 //
 163 // QViewSource
 164 //
 165 /////////////////////////////////////////////////////////////////////
 166
 167 void QViewSource::update(bool full_source)
 168 {
 169         document_->setPlainText(toqstr(updateContent(full_source)));
 170 }
 171
 172
 173 } // namespace frontend
 174 } // namespace lyx
 175
 176 #include "QViewSource_moc.cpp"