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 #include "BufferView.h"
  20 #include "Buffer.h"
  21 #include "Cursor.h"
  22 #include "gettext.h"
  23 #include "Paragraph.h"
  24 #include "TexRow.h"
  25
  26 #include <QTextCursor>
  27 #include <QTextDocument>
  28 #include <boost/tuple/tuple.hpp>
  29
  30 using std::string;
  31
  32 namespace lyx {
  33 namespace frontend {
  34
  35 GuiViewSourceDialog::GuiViewSourceDialog(ControlViewSource & controller)
  36         :       controller_(controller), document_(new QTextDocument(this)),
  37                 highlighter_(new LaTeXHighlighter(document_))
  38 {
  39         setupUi(this);
  40         setWindowTitle(qt_("LaTeX Source"));
  41
  42         connect(viewFullSourceCB, SIGNAL(clicked()),
  43                 this, SLOT(updateView()));
  44         connect(autoUpdateCB, SIGNAL(toggled(bool)),
  45                 updatePB, SLOT(setDisabled(bool)));
  46         connect(updatePB, SIGNAL(clicked()),
  47                 this, SLOT(updateView()));
  48
  49         // setting a document at this point trigger an assertion in Qt
  50         // so we disable the signals here:
  51         document()->blockSignals(true);
  52         viewSourceTV->setDocument(document());
  53         document()->blockSignals(false);
  54         viewSourceTV->setReadOnly(true);
  55         ///dialog_->viewSourceTV->setAcceptRichText(false);
  56         // this is personal. I think source code should be in fixed-size font
  57         QFont font(toqstr(theApp()->typewriterFontName()));
  58         font.setKerning(false);
  59         font.setFixedPitch(true);
  60         font.setStyleHint(QFont::TypeWriter);
  61         viewSourceTV->setFont(font);
  62         // again, personal taste
  63         viewSourceTV->setWordWrapMode(QTextOption::NoWrap);
  64 }
  65
  66
  67 void GuiViewSourceDialog::updateView()
  68 {
  69         if (autoUpdateCB->isChecked())
  70                 update(viewFullSourceCB->isChecked());
  71
  72         int beg, end;
  73         boost::tie(beg, end) = controller_.getRows();
  74         QTextCursor c = QTextCursor(viewSourceTV->document());
  75         c.movePosition(QTextCursor::NextBlock, QTextCursor::MoveAnchor, beg);
  76         c.select(QTextCursor::BlockUnderCursor);
  77         c.movePosition(QTextCursor::NextBlock, QTextCursor::KeepAnchor, end - beg + 1);
  78         viewSourceTV->setTextCursor(c);
  79         QWidget::update();
  80 }
  81
  82
  83 void GuiViewSourceDialog::update(bool full_source)
  84 {
  85         document_->setPlainText(toqstr(controller_.updateContent(full_source)));
  86 }
  87
  88
  89
  90 /////////////////////////////////////////////////////////////////////
  91 //
  92 // LaTeXHighlighter
  93 //
  94 /////////////////////////////////////////////////////////////////////
  95
  96
  97 LaTeXHighlighter::LaTeXHighlighter(QTextDocument * parent)
  98         : QSyntaxHighlighter(parent)
  99 {
 100         keywordFormat.setForeground(Qt::darkBlue);
 101         keywordFormat.setFontWeight(QFont::Bold);
 102         commentFormat.setForeground(Qt::darkGray);
 103         mathFormat.setForeground(Qt::red);
 104 }
 105
 106
 107 void LaTeXHighlighter::highlightBlock(QString const & text)
 108 {
 109         // $ $
 110         QRegExp exprMath("\\$[^\\$]*\\$");
 111         int index = text.indexOf(exprMath);
 112         while (index >= 0) {
 113                 int length = exprMath.matchedLength();
 114                 setFormat(index, length, mathFormat);
 115                 index = text.indexOf(exprMath, index + length);
 116         }
 117         // [ ]
 118         QRegExp exprStartDispMath("(\\\\\\[|"
 119                 "\\\\begin\\{equation\\**\\}|"
 120                 "\\\\begin\\{eqnarray\\**\\}|"
 121                 "\\\\begin\\{align(ed|at)*\\**\\}|"
 122                 "\\\\begin\\{flalign\\**\\}|"
 123                 "\\\\begin\\{gather\\**\\}|"
 124                 "\\\\begin\\{multline\\**\\}|"
 125                 "\\\\begin\\{array\\**\\}|"
 126                 "\\\\begin\\{cases\\**\\}"
 127                 ")");
 128         QRegExp exprEndDispMath("(\\\\\\]|"
 129                 "\\\\end\\{equation\\**\\}|"
 130                 "\\\\end\\{eqnarray\\**\\}|"
 131                 "\\\\end\\{align(ed|at)*\\**\\}|"
 132                 "\\\\end\\{flalign\\**\\}|"
 133                 "\\\\end\\{gather\\**\\}|"
 134                 "\\\\end\\{multline\\**\\}|"
 135                 "\\\\end\\{array\\**\\}|"
 136                 "\\\\end\\{cases\\**\\}"
 137                 ")");
 138         int startIndex = 0;
 139         // if previous block was in 'disp math'
 140         // start search from 0 (for end disp math)
 141         // otherwise, start search from 'begin disp math'
 142         if (previousBlockState() != 1)
 143                 startIndex = text.indexOf(exprStartDispMath);
 144         while (startIndex >= 0) {
 145                 int endIndex = text.indexOf(exprEndDispMath, startIndex);
 146                 int length;
 147                 if (endIndex == -1) {
 148                         setCurrentBlockState(1);
 149                         length = text.length() - startIndex;
 150                 } else {
 151                         length = endIndex - startIndex + exprEndDispMath.matchedLength();
 152                 }
 153                 setFormat(startIndex, length, mathFormat);
 154                 startIndex = text.indexOf(exprStartDispMath, startIndex + length);
 155         }
 156         // \whatever
 157         QRegExp exprKeyword("\\\\[A-Za-z]+");
 158         index = text.indexOf(exprKeyword);
 159         while (index >= 0) {
 160                 int length = exprKeyword.matchedLength();
 161                 setFormat(index, length, keywordFormat);
 162                 index = text.indexOf(exprKeyword, index + length);
 163         }
 164         // comment
 165         QRegExp exprComment("(^|[^\\\\])%.*$");
 166         index = text.indexOf(exprComment);
 167         while (index >= 0) {
 168                 int const length = exprComment.matchedLength();
 169                 setFormat(index, length, commentFormat);
 170                 index = text.indexOf(exprComment, index + length);
 171         }
 172 }
 173
 174
 175 ControlViewSource::ControlViewSource(Dialog & parent)
 176         : Controller(parent)
 177 {}
 178
 179
 180 bool ControlViewSource::initialiseParams(string const & /*source*/)
 181 {
 182         return true;
 183 }
 184
 185
 186 docstring const ControlViewSource::updateContent(bool fullSource)
 187 {
 188         // get the *top* level paragraphs that contain the cursor,
 189         // or the selected text
 190         pit_type par_begin;
 191         pit_type par_end;
 192
 193         BufferView * view = bufferview();
 194         if (!view->cursor().selection()) {
 195                 par_begin = view->cursor().bottom().pit();
 196                 par_end = par_begin;
 197         } else {
 198                 par_begin = view->cursor().selectionBegin().bottom().pit();
 199                 par_end = view->cursor().selectionEnd().bottom().pit();
 200         }
 201         if (par_begin > par_end)
 202                 std::swap(par_begin, par_end);
 203         odocstringstream ostr;
 204         view->buffer().getSourceCode(ostr, par_begin, par_end + 1, fullSource);
 205         return ostr.str();
 206 }
 207
 208
 209 std::pair<int, int> ControlViewSource::getRows() const
 210 {
 211         BufferView const * view = bufferview();
 212         CursorSlice beg = view->cursor().selectionBegin().bottom();
 213         CursorSlice end = view->cursor().selectionEnd().bottom();
 214
 215         int begrow = view->buffer().texrow().
 216                 getRowFromIdPos(beg.paragraph().id(), beg.pos());
 217         int endrow = view->buffer().texrow().
 218                 getRowFromIdPos(end.paragraph().id(), end.pos());
 219         int nextendrow = view->buffer().texrow().
 220                 getRowFromIdPos(end.paragraph().id(), end.pos() + 1);
 221         return std::make_pair(begrow, endrow == nextendrow ? endrow : (nextendrow - 1));
 222 }
 223
 224
 225 docstring const ControlViewSource::title() const
 226 {
 227         switch (docType()) {
 228                 case LATEX:
 229                         return _("LaTeX Source");
 230                 case DOCBOOK:
 231                         return _("DocBook Source");
 232                 case LITERATE:
 233                         return _("Literate Source");
 234                 default:
 235                         BOOST_ASSERT(false);
 236                         return docstring();
 237         }
 238 }
 239
 240
 241 Dialog * createGuiViewSource(LyXView & lv)
 242 {
 243         return new GuiViewSource(static_cast<GuiViewBase &>(lv));
 244 }
 245
 246
 247 } // namespace frontend
 248 } // namespace lyx
 249
 250 #include "GuiViewSource_moc.cpp"