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 "GuiApplication.h"
  16 #include "GuiViewSource.h"
  17 #include "LaTeXHighlighter.h"
  18 #include "qt_helpers.h"
  19
  20 #include "Buffer.h"
  21 #include "BufferParams.h"
  22 #include "BufferView.h"
  23 #include "Cursor.h"
  24 #include "Format.h"
  25 #include "Paragraph.h"
  26 #include "TexRow.h"
  27
  28 #include "support/debug.h"
  29 #include "support/lassert.h"
  30 #include "support/docstream.h"
  31 #include "support/gettext.h"
  32
  33 #include <boost/crc.hpp>
  34
  35 #include <QSettings>
  36 #include <QTextCursor>
  37 #include <QTextDocument>
  38 #include <QVariant>
  39
  40 using namespace std;
  41
  42 namespace lyx {
  43 namespace frontend {
  44
  45 ViewSourceWidget::ViewSourceWidget()
  46         :       bv_(0), document_(new QTextDocument(this)),
  47                 highlighter_(new LaTeXHighlighter(document_)),
  48                 force_getcontent_(true)
  49 {
  50         setupUi(this);
  51
  52         connect(contentsCO, SIGNAL(activated(int)),
  53                 this, SLOT(contentsChanged()));
  54         connect(autoUpdateCB, SIGNAL(toggled(bool)),
  55                 updatePB, SLOT(setDisabled(bool)));
  56         connect(autoUpdateCB, SIGNAL(toggled(bool)),
  57                 this, SLOT(updateView()));
  58         connect(updatePB, SIGNAL(clicked()),
  59                 this, SLOT(updateView()));
  60         connect(outputFormatCO, SIGNAL(activated(int)),
  61                 this, SLOT(updateView()));
  62
  63         // setting a document at this point trigger an assertion in Qt
  64         // so we disable the signals here:
  65         document_->blockSignals(true);
  66         viewSourceTV->setDocument(document_);
  67         document_->blockSignals(false);
  68         viewSourceTV->setReadOnly(true);
  69         ///dialog_->viewSourceTV->setAcceptRichText(false);
  70         // this is personal. I think source code should be in fixed-size font
  71         QFont font(guiApp->typewriterFontName());
  72         font.setKerning(false);
  73         font.setFixedPitch(true);
  74         font.setStyleHint(QFont::TypeWriter);
  75         viewSourceTV->setFont(font);
  76         // again, personal taste
  77         viewSourceTV->setWordWrapMode(QTextOption::NoWrap);
  78 }
  79
  80
  81 static size_t crcCheck(docstring const & s)
  82 {
  83         boost::crc_32_type crc;
  84         crc.process_bytes(&s[0], sizeof(char_type) * s.size());
  85         return crc.checksum();
  86 }
  87
  88
  89 /** get the source code of selected paragraphs, or the whole document
  90         \param fullSource get full source code
  91         \return true if the content has changed since last call.
  92  */
  93 static bool getContent(BufferView const * view, Buffer::OutputWhat output,
  94                        QString & qstr, string const format, bool force_getcontent)
  95 {
  96         // get the *top* level paragraphs that contain the cursor,
  97         // or the selected text
  98         pit_type par_begin;
  99         pit_type par_end;
 100
 101         if (!view->cursor().selection()) {
 102                 par_begin = view->cursor().bottom().pit();
 103                 par_end = par_begin;
 104         } else {
 105                 par_begin = view->cursor().selectionBegin().bottom().pit();
 106                 par_end = view->cursor().selectionEnd().bottom().pit();
 107         }
 108         if (par_begin > par_end)
 109                 swap(par_begin, par_end);
 110         odocstringstream ostr;
 111         view->buffer().getSourceCode(ostr, format, par_begin, par_end + 1, output);
 112         docstring s = ostr.str();
 113         static size_t crc = 0;
 114         size_t newcrc = crcCheck(s);
 115         if (newcrc == crc && !force_getcontent)
 116                 return false;
 117         crc = newcrc;
 118         qstr = toqstr(s);
 119         return true;
 120 }
 121
 122
 123 void ViewSourceWidget::setBufferView(BufferView const * bv)
 124 {
 125         if (bv_ != bv)
 126                 force_getcontent_ = true;
 127         bv_ = bv;
 128         setEnabled(bv ?  true : false);
 129 }
 130
 131
 132 void ViewSourceWidget::contentsChanged()
 133 {
 134         if (autoUpdateCB->isChecked())
 135                 updateView();
 136 }
 137
 138
 139 void ViewSourceWidget::updateView()
 140 {
 141         if (!bv_) {
 142                 document_->setPlainText(QString());
 143                 setEnabled(false);
 144                 return;
 145         }
 146
 147         setEnabled(true);
 148
 149         string const format = fromqstr(outputFormatCO->itemData(
 150                 outputFormatCO->currentIndex()).toString());
 151
 152         QString content;
 153         Buffer::OutputWhat output = Buffer::CurrentParagraph;
 154         if (contentsCO->currentIndex() == 1)
 155                 output = Buffer::FullSource;
 156         else if (contentsCO->currentIndex() == 2)
 157                 output = Buffer::OnlyPreamble;
 158         else if (contentsCO->currentIndex() == 3)
 159                 output = Buffer::OnlyBody;
 160
 161         if (getContent(bv_, output, content, format, force_getcontent_))
 162                 document_->setPlainText(content);
 163
 164         CursorSlice beg = bv_->cursor().selectionBegin().bottom();
 165         CursorSlice end = bv_->cursor().selectionEnd().bottom();
 166         int const begrow = bv_->buffer().texrow().
 167                 getRowFromIdPos(beg.paragraph().id(), beg.pos());
 168         int endrow = bv_->buffer().texrow().
 169                 getRowFromIdPos(end.paragraph().id(), end.pos());
 170         int const nextendrow = bv_->buffer().texrow().
 171                 getRowFromIdPos(end.paragraph().id(), end.pos() + 1);
 172         if (endrow != nextendrow)
 173                 endrow = nextendrow - 1;
 174
 175         QTextCursor c = QTextCursor(viewSourceTV->document());
 176         c.movePosition(QTextCursor::NextBlock, QTextCursor::MoveAnchor, begrow);
 177         c.select(QTextCursor::BlockUnderCursor);
 178         c.movePosition(QTextCursor::NextBlock, QTextCursor::KeepAnchor,
 179                 endrow - begrow + 1);
 180         viewSourceTV->setTextCursor(c);
 181 }
 182
 183
 184 void ViewSourceWidget::updateDefaultFormat()
 185 {
 186         if (!bv_)
 187                 return;
 188
 189         outputFormatCO->blockSignals(true);
 190         outputFormatCO->clear();
 191         outputFormatCO->addItem(qt_("Default"),
 192                                 QVariant(QString("default")));
 193         typedef vector<Format const *> Formats;
 194         Formats formats = bv_->buffer().params().exportableFormats(true);
 195         Formats::const_iterator cit = formats.begin();
 196         Formats::const_iterator end = formats.end();
 197         for (; cit != end; ++cit)
 198                 outputFormatCO->addItem(qt_((*cit)->prettyname()),
 199                                 QVariant(toqstr((*cit)->name())));
 200         outputFormatCO->blockSignals(false);
 201 }
 202
 203
 204 GuiViewSource::GuiViewSource(GuiView & parent,
 205                 Qt::DockWidgetArea area, Qt::WindowFlags flags)
 206         : DockView(parent, "view-source", qt_("LaTeX Source"), area, flags)
 207 {
 208         widget_ = new ViewSourceWidget();
 209         setWidget(widget_);
 210 }
 211
 212
 213 GuiViewSource::~GuiViewSource()
 214 {
 215         delete widget_;
 216 }
 217
 218
 219 void GuiViewSource::updateView()
 220 {
 221         if (widget_->autoUpdateCB->isChecked()) {
 222                 widget_->setBufferView(bufferview());
 223                 widget_->updateView();
 224         }
 225 }
 226
 227
 228 void GuiViewSource::enableView(bool enable)
 229 {
 230         widget_->setBufferView(bufferview());
 231         widget_->updateDefaultFormat();
 232         if (!enable)
 233                 // In the opposite case, updateView() will be called anyway.
 234                 widget_->updateView();
 235 }
 236
 237
 238 bool GuiViewSource::initialiseParams(string const & /*source*/)
 239 {
 240         setWindowTitle(title());
 241         return true;
 242 }
 243
 244
 245 QString GuiViewSource::title() const
 246 {
 247         switch (docType()) {
 248                 case LATEX:
 249                         return qt_("LaTeX Source");
 250                 case DOCBOOK:
 251                         return qt_("DocBook Source");
 252                 case LITERATE:
 253                         return qt_("Literate Source");
 254         }
 255         LASSERT(false, /**/);
 256         return QString();
 257 }
 258
 259
 260 void GuiViewSource::saveSession() const
 261 {
 262         Dialog::saveSession();
 263         QSettings settings;
 264         // see below
 265         // settings.setValue(
 266         //      sessionKey() + "/output", widget_->contentsCO->currentIndex());
 267         settings.setValue(
 268                 sessionKey() + "/autoupdate", widget_->autoUpdateCB->isChecked());
 269 }
 270
 271
 272 void GuiViewSource::restoreSession()
 273 {
 274         DockView::restoreSession();
 275         // FIXME: Full source updating is too slow to be done at startup.
 276         //widget_->outputCO-setCurrentIndex(
 277         //      settings.value(sessionKey() + "/output", false).toInt());
 278         widget_->contentsCO->setCurrentIndex(0);
 279         QSettings settings;
 280         widget_->autoUpdateCB->setChecked(
 281                 settings.value(sessionKey() + "/autoupdate", true).toBool());
 282         widget_->updateView();
 283 }
 284
 285
 286 Dialog * createGuiViewSource(GuiView & lv)
 287 {
 288         return new GuiViewSource(lv);
 289 }
 290
 291
 292 } // namespace frontend
 293 } // namespace lyx
 294
 295 #include "moc_GuiViewSource.cpp"