src/frontends/qt4/GuiApplication.cpp

   1 /**
   2  * \file qt4/GuiApplication.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author unknown
   7  * \author John Levon
   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
  17 #include "qt_helpers.h"
  18 #include "QLImage.h"
  19 #include "socket_callback.h"
  20
  21 #include "frontends/LyXView.h"
  22
  23 #include "graphics/LoaderQueue.h"
  24
  25 #include "support/FileName.h"
  26 #include "support/lstrings.h"
  27 #include "support/os.h"
  28 #include "support/Package.h"
  29
  30 #include "BufferView.h"
  31 #include "Color.h"
  32 #include "debug.h"
  33 #include "FuncRequest.h"
  34 #include "LyX.h"
  35 #include "LyXFunc.h"
  36 #include "LyXRC.h"
  37
  38 #include <QApplication>
  39 #include <QClipboard>
  40 #include <QEventLoop>
  41 #include <QFileOpenEvent>
  42 #include <QLocale>
  43 #include <QLibraryInfo>
  44 #include <QTextCodec>
  45 #include <QTimer>
  46 #include <QTranslator>
  47 #include <QWidget>
  48
  49 #ifdef Q_WS_X11
  50 #include <X11/Xatom.h>
  51 #include <X11/Xlib.h>
  52 #endif
  53
  54 #include <boost/bind.hpp>
  55
  56 #include <exception>
  57
  58 using std::string;
  59 using std::endl;
  60
  61 ///////////////////////////////////////////////////////////////
  62 // You can find other X11 specific stuff
  63 // at the end of this file...
  64 ///////////////////////////////////////////////////////////////
  65
  66 namespace {
  67
  68 int getDPI()
  69 {
  70         QWidget w;
  71         return int(0.5 * (w.logicalDpiX() + w.logicalDpiY()));
  72 }
  73
  74 } // namespace anon
  75
  76
  77 namespace lyx {
  78
  79 using support::FileName;
  80
  81 frontend::Application * createApplication(int & argc, char * argv[])
  82 {
  83         return new frontend::GuiApplication(argc, argv);
  84 }
  85
  86
  87 namespace frontend {
  88
  89 GuiApplication * guiApp;
  90
  91
  92 GuiApplication::~GuiApplication()
  93 {
  94         socket_callbacks_.clear();
  95 }
  96
  97
  98 GuiApplication::GuiApplication(int & argc, char ** argv)
  99         : QApplication(argc, argv), Application(argc, argv)
 100 {
 101         // Qt bug? setQuitOnLastWindowClosed(true); does not work
 102         setQuitOnLastWindowClosed(false);
 103
 104 #ifdef Q_WS_X11
 105         // doubleClickInterval() is 400 ms on X11 which is just too long.
 106         // On Windows and Mac OS X, the operating system's value is used.
 107         // On Microsoft Windows, calling this function sets the double
 108         // click interval for all applications. So we don't!
 109         QApplication::setDoubleClickInterval(300);
 110 #endif
 111
 112         // install translation file for Qt built-in dialogs
 113         QString language_name = QString("qt_") + QLocale::system().name();
 114         language_name.truncate(5);
 115         if (qt_trans_.load(language_name,
 116                 QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
 117         {
 118                 qApp->installTranslator(&qt_trans_);
 119                 // even if the language calls for RtL, don't do that
 120                 qApp->setLayoutDirection(Qt::LeftToRight);
 121                 LYXERR(Debug::GUI)
 122                         << "Successfully installed Qt translations for locale "
 123                         << fromqstr(language_name) << std::endl;
 124         } else
 125                 LYXERR(Debug::GUI)
 126                         << "Could not find  Qt translations for locale "
 127                         << fromqstr(language_name) << std::endl;
 128
 129         using namespace lyx::graphics;
 130
 131         Image::newImage = boost::bind(&QLImage::newImage);
 132         Image::loadableFormats = boost::bind(&QLImage::loadableFormats);
 133
 134         // needs to be done before reading lyxrc
 135         lyxrc.dpi = getDPI();
 136
 137         LoaderQueue::setPriority(10,100);
 138
 139         guiApp = this;
 140 }
 141
 142
 143 Clipboard& GuiApplication::clipboard()
 144 {
 145         return clipboard_;
 146 }
 147
 148
 149 Selection& GuiApplication::selection()
 150 {
 151         return selection_;
 152 }
 153
 154
 155 int const GuiApplication::exec()
 156 {
 157         QTimer::singleShot(1, this, SLOT(execBatchCommands()));
 158         return QApplication::exec();
 159 }
 160
 161
 162 void GuiApplication::exit(int status)
 163 {
 164         QApplication::exit(status);
 165 }
 166
 167
 168 void GuiApplication::execBatchCommands()
 169 {
 170         LyX::ref().execBatchCommands();
 171 }
 172
 173
 174 string const GuiApplication::romanFontName()
 175 {
 176         QFont font;
 177         font.setKerning(false);
 178         font.setStyleHint(QFont::Serif);
 179         font.setFamily("serif");
 180
 181         return fromqstr(QFontInfo(font).family());
 182 }
 183
 184
 185 string const GuiApplication::sansFontName()
 186 {
 187         QFont font;
 188         font.setKerning(false);
 189         font.setStyleHint(QFont::SansSerif);
 190         font.setFamily("sans");
 191
 192         return fromqstr(QFontInfo(font).family());
 193 }
 194
 195
 196 string const GuiApplication::typewriterFontName()
 197 {
 198         QFont font;
 199         font.setKerning(false);
 200         font.setStyleHint(QFont::TypeWriter);
 201         font.setFamily("monospace");
 202
 203         return fromqstr(QFontInfo(font).family());
 204 }
 205
 206
 207 bool GuiApplication::event(QEvent * e)
 208 {
 209         switch(e->type()) {
 210         case QEvent::FileOpen: {
 211                 // Open a file; this happens only on Mac OS X for now
 212                 QFileOpenEvent * foe = static_cast<QFileOpenEvent *>(e);
 213
 214                 if (!currentView() || !currentView()->view())
 215                         // The application is not properly initialized yet.
 216                         // So we acknowledge the event and delay the file opening
 217                         // until LyX is ready.
 218                         // FIXME UNICODE: FileName accept an utf8 encoded string.
 219                         LyX::ref().addFileToLoad(FileName(fromqstr(foe->file())));
 220                 else
 221                         lyx::dispatch(FuncRequest(LFUN_FILE_OPEN,
 222                                 qstring_to_ucs4(foe->file())));
 223
 224                 e->accept();
 225                 return true;
 226         }
 227         default:
 228                 return QApplication::event(e);
 229         }
 230 }
 231
 232
 233 bool GuiApplication::notify(QObject * receiver, QEvent * event)
 234 {
 235         bool return_value;
 236         try {
 237                 return_value = QApplication::notify(receiver, event);
 238         }
 239         catch (std::exception  const & e) {
 240                 lyxerr << "Caught \"normal\" exception: " << e.what() << endl;
 241                 LyX::cref().emergencyCleanup();
 242                 abort();
 243         }
 244         catch (...) {
 245                 lyxerr << "Caught some really weird exception..." << endl;
 246                 LyX::cref().emergencyCleanup();
 247                 abort();
 248         }
 249
 250         return return_value;
 251 }
 252
 253
 254 void GuiApplication::syncEvents()
 255 {
 256         // This is the ONLY place where processEvents may be called.
 257         // During screen update/ redraw, this method is disabled to
 258         // prevent keyboard events being handed to the LyX core, where
 259         // they could cause re-entrant calls to screen update.
 260         processEvents(QEventLoop::ExcludeUserInputEvents);
 261 }
 262
 263
 264 bool GuiApplication::getRgbColor(Color_color col,
 265         RGBColor & rgbcol)
 266 {
 267         QColor const & qcol = color_cache_.get(col);
 268         if (!qcol.isValid()) {
 269                 rgbcol.r = 0;
 270                 rgbcol.g = 0;
 271                 rgbcol.b = 0;
 272                 return false;
 273         }
 274         rgbcol.r = qcol.red();
 275         rgbcol.g = qcol.green();
 276         rgbcol.b = qcol.blue();
 277         return true;
 278 }
 279
 280
 281 string const GuiApplication::hexName(Color_color col)
 282 {
 283         return lyx::support::ltrim(fromqstr(color_cache_.get(col).name()), "#");
 284 }
 285
 286
 287 void GuiApplication::updateColor(Color_color)
 288 {
 289         // FIXME: Bleh, can't we just clear them all at once ?
 290         color_cache_.clear();
 291 }
 292
 293
 294 void GuiApplication::registerSocketCallback(int fd, boost::function<void()> func)
 295 {
 296         socket_callbacks_[fd] =
 297                 boost::shared_ptr<socket_callback>(new socket_callback(fd, func));
 298 }
 299
 300
 301 void GuiApplication::unregisterSocketCallback(int fd)
 302 {
 303         socket_callbacks_.erase(fd);
 304 }
 305
 306 ////////////////////////////////////////////////////////////////////////
 307 // X11 specific stuff goes here...
 308 #ifdef Q_WS_X11
 309 bool GuiApplication::x11EventFilter(XEvent * xev)
 310 {
 311         if (!currentView())
 312                 return false;
 313
 314         switch (xev->type) {
 315         case SelectionRequest: {
 316                 if (xev->xselectionrequest.selection != XA_PRIMARY)
 317                         break;
 318                 LYXERR(Debug::GUI) << "X requested selection." << endl;
 319                 BufferView * bv = currentView()->view();
 320                 if (bv) {
 321                         docstring const sel = bv->requestSelection();
 322                         if (!sel.empty())
 323                                 selection_.put(sel);
 324                 }
 325                 break;
 326         }
 327         case SelectionClear: {
 328                 if (xev->xselectionclear.selection != XA_PRIMARY)
 329                         break;
 330                 LYXERR(Debug::GUI) << "Lost selection." << endl;
 331                 BufferView * bv = currentView()->view();
 332                 if (bv)
 333                         bv->clearSelection();
 334                 break;
 335         }
 336         }
 337         return false;
 338 }
 339 #endif
 340
 341
 342 } // namespace frontend
 343 } // namespace lyx
 344
 345 #include "GuiApplication_moc.cpp"