src/frontends/qt4/GuiViewSource.cpp

   1 /**
   2  * \file GuiViewSource.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 "GuiViewSource.h"
  16 #include "qt_helpers.h"
  17
  18 #include "Application.h"
  19
  20 #include <QTextCursor>
  21 #include <QTextDocument>
  22 #include <boost/tuple/tuple.hpp>
  23
  24 namespace lyx {
  25 namespace frontend {
  26
  27 GuiViewSourceDialog::GuiViewSourceDialog(ControlViewSource & controller)
  28         :       controller_(controller), document_(new QTextDocument(this)),
  29                 highlighter_(new LaTeXHighlighter(document_))
  30 {
  31         setupUi(this);
  32         setWindowTitle(qt_("LaTeX Source"));
  33
  34         connect(viewFullSourceCB, SIGNAL(clicked()),
  35                 this, SLOT(updateView()));
  36         connect(autoUpdateCB, SIGNAL(toggled(bool)),
  37                 updatePB, SLOT(setDisabled(bool)));
  38         connect(updatePB, SIGNAL(clicked()),
  39                 this, SLOT(updateView()));
  40
  41         // setting a document at this point trigger an assertion in Qt
  42         // so we disable the signals here:
  43         document()->blockSignals(true);
  44         viewSourceTV->setDocument(document());
  45         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 GuiViewSourceDialog::updateView()
  60 {
  61         if (autoUpdateCB->isChecked())
  62                 update(viewFullSourceCB->isChecked());
  63
  64         int beg, end;
  65         boost::tie(beg, end) = controller_.getRows();
  66         QTextCursor c = QTextCursor(viewSourceTV->document());
  67         c.movePosition(QTextCursor::NextBlock, QTextCursor::MoveAnchor, beg);
  68         c.select(QTextCursor::BlockUnderCursor);
  69         c.movePosition(QTextCursor::NextBlock, QTextCursor::KeepAnchor, end - beg + 1);
  70         viewSourceTV->setTextCursor(c);
  71         QWidget::update();
  72 }
  73
  74
  75 void GuiViewSourceDialog::update(bool full_source)
  76 {
  77         document_->setPlainText(toqstr(controller_.updateContent(full_source)));
  78 }
  79
  80
  81
  82 /////////////////////////////////////////////////////////////////////
  83 //
  84 // LaTeXHighlighter
  85 //
  86 /////////////////////////////////////////////////////////////////////
  87
  88
  89 LaTeXHighlighter::LaTeXHighlighter(QTextDocument * parent)
  90         : QSyntaxHighlighter(parent)
  91 {
  92         keywordFormat.setForeground(Qt::darkBlue);
  93         keywordFormat.setFontWeight(QFont::Bold);
  94         commentFormat.setForeground(Qt::darkGray);
  95         mathFormat.setForeground(Qt::red);
  96 }
  97
  98
  99 void LaTeXHighlighter::highlightBlock(QString const & text)
 100 {
 101         // $ $
 102         QRegExp exprMath("\\$[^\\$]*\\$");
 103         int index = text.indexOf(exprMath);
 104         while (index >= 0) {
 105                 int length = exprMath.matchedLength();
 106                 setFormat(index, length, mathFormat);
 107                 index = text.indexOf(exprMath, index + length);
 108         }
 109         // [ ]
 110         QRegExp exprStartDispMath("(\\\\\\[|"
 111                 "\\\\begin\\{equation\\**\\}|"
 112                 "\\\\begin\\{eqnarray\\**\\}|"
 113                 "\\\\begin\\{align(ed|at)*\\**\\}|"
 114                 "\\\\begin\\{flalign\\**\\}|"
 115                 "\\\\begin\\{gather\\**\\}|"
 116                 "\\\\begin\\{multline\\**\\}|"
 117                 "\\\\begin\\{array\\**\\}|"
 118                 "\\\\begin\\{cases\\**\\}"
 119                 ")");
 120         QRegExp exprEndDispMath("(\\\\\\]|"
 121                 "\\\\end\\{equation\\**\\}|"
 122                 "\\\\end\\{eqnarray\\**\\}|"
 123                 "\\\\end\\{align(ed|at)*\\**\\}|"
 124                 "\\\\end\\{flalign\\**\\}|"
 125                 "\\\\end\\{gather\\**\\}|"
 126                 "\\\\end\\{multline\\**\\}|"
 127                 "\\\\end\\{array\\**\\}|"
 128                 "\\\\end\\{cases\\**\\}"
 129                 ")");
 130         int startIndex = 0;
 131         // if previous block was in 'disp math'
 132         // start search from 0 (for end disp math)
 133         // otherwise, start search from 'begin disp math'
 134         if (previousBlockState() != 1)
 135                 startIndex = text.indexOf(exprStartDispMath);
 136         while (startIndex >= 0) {
 137                 int endIndex = text.indexOf(exprEndDispMath, startIndex);
 138                 int length;
 139                 if (endIndex == -1) {
 140                         setCurrentBlockState(1);
 141                         length = text.length() - startIndex;
 142                 } else {
 143                         length = endIndex - startIndex + exprEndDispMath.matchedLength();
 144                 }
 145                 setFormat(startIndex, length, mathFormat);
 146                 startIndex = text.indexOf(exprStartDispMath, startIndex + length);
 147         }
 148         // \whatever
 149         QRegExp exprKeyword("\\\\[A-Za-z]+");
 150         index = text.indexOf(exprKeyword);
 151         while (index >= 0) {
 152                 int length = exprKeyword.matchedLength();
 153                 setFormat(index, length, keywordFormat);
 154                 index = text.indexOf(exprKeyword, index + length);
 155         }
 156         // comment
 157         QRegExp exprComment("(^|[^\\\\])%.*$");
 158         index = text.indexOf(exprComment);
 159         while (index >= 0) {
 160                 int const length = exprComment.matchedLength();
 161                 setFormat(index, length, commentFormat);
 162                 index = text.indexOf(exprComment, index + length);
 163         }
 164 }
 165
 166
 167 } // namespace frontend
 168 } // namespace lyx
 169
 170 #include "GuiViewSource_moc.cpp"