src/frontends/qt4/GuiApplication.cpp

   1 /**
   2  * \file 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 "GuiView.h"
  18 #include "qt_helpers.h"
  19 #include "GuiImage.h"
  20
  21 #include "frontends/alert.h"
  22
  23 #include "graphics/LoaderQueue.h"
  24
  25 #include "support/ExceptionMessage.h"
  26 #include "support/FileName.h"
  27 #include "support/lstrings.h"
  28 #include "support/os.h"
  29 #include "support/Package.h"
  30
  31 #include "BufferList.h"
  32 #include "BufferView.h"
  33 #include "debug.h"
  34 #include "FuncRequest.h"
  35 #include "gettext.h"
  36 #include "LyX.h"
  37 #include "LyXFunc.h"
  38 #include "LyXRC.h"
  39
  40 #include <QApplication>
  41 #include <QClipboard>
  42 #include <QEventLoop>
  43 #include <QFileOpenEvent>
  44 #include <QLocale>
  45 #include <QLibraryInfo>
  46 #include <QPixmapCache>
  47 #include <QSessionManager>
  48 #include <QSocketNotifier>
  49 #include <QTextCodec>
  50 #include <QTimer>
  51 #include <QTranslator>
  52 #include <QWidget>
  53
  54 #ifdef Q_WS_X11
  55 #include <X11/Xatom.h>
  56 #include <X11/Xlib.h>
  57 #undef CursorShape
  58 #undef None
  59 #endif
  60
  61 #include <boost/bind.hpp>
  62
  63 #include <exception>
  64
  65 using std::string;
  66 using std::endl;
  67
  68
  69 namespace lyx {
  70
  71 frontend::Application * createApplication(int & argc, char * argv[])
  72 {
  73         return new frontend::GuiApplication(argc, argv);
  74 }
  75
  76
  77 namespace frontend {
  78
  79 class SocketNotifier : public QSocketNotifier
  80 {
  81 public:
  82         /// connect a connection notification from the LyXServerSocket
  83         SocketNotifier(QObject * parent, int fd, Application::SocketCallback func)
  84                 : QSocketNotifier(fd, QSocketNotifier::Read, parent), func_(func)
  85         {}
  86
  87 public:
  88         /// The callback function
  89         Application::SocketCallback func_;
  90 };
  91
  92
  93 ////////////////////////////////////////////////////////////////////////
  94 // Mac specific stuff goes here...
  95
  96 class MenuTranslator : public QTranslator
  97 {
  98 public:
  99         MenuTranslator(QObject * parent)
 100                 : QTranslator(parent)
 101         {}
 102
 103         QString translate(const char * /*context*/,
 104           const char * sourceText,
 105           const char * /*comment*/ = 0)
 106         {
 107                 string const s = sourceText;
 108                 if (s == N_("About %1") || s == N_("Preferences")
 109                                 || s == N_("Reconfigure") || s == N_("Quit %1"))
 110                         return qt_(s);
 111                 else
 112                         return QString();
 113         }
 114 };
 115
 116
 117 ///////////////////////////////////////////////////////////////
 118 // You can find more platform specific stuff
 119 // at the end of this file...
 120 ///////////////////////////////////////////////////////////////
 121
 122
 123 using support::FileName;
 124
 125 GuiApplication * guiApp;
 126
 127
 128 GuiApplication::GuiApplication(int & argc, char ** argv)
 129         : QApplication(argc, argv), Application()
 130 {
 131         QCoreApplication::setOrganizationName("The LyX Community");
 132         QCoreApplication::setOrganizationDomain("lyx.org");
 133         QCoreApplication::setApplicationName("LyX");
 134
 135         // Qt bug? setQuitOnLastWindowClosed(true); does not work
 136         setQuitOnLastWindowClosed(false);
 137
 138 #ifdef Q_WS_X11
 139         // doubleClickInterval() is 400 ms on X11 which is just too long.
 140         // On Windows and Mac OS X, the operating system's value is used.
 141         // On Microsoft Windows, calling this function sets the double
 142         // click interval for all applications. So we don't!
 143         QApplication::setDoubleClickInterval(300);
 144 #endif
 145
 146         // install translation file for Qt built-in dialogs
 147         QString language_name = QString("qt_") + QLocale::system().name();
 148
 149         // language_name can be short (e.g. qt_zh) or long (e.g. qt_zh_CN).
 150         // Short-named translator can be loaded from a long name, but not the
 151         // opposite. Therefore, long name should be used without truncation.
 152         // c.f. http://doc.trolltech.com/4.1/qtranslator.html#load
 153         if (qt_trans_.load(language_name,
 154                 QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
 155         {
 156                 installTranslator(&qt_trans_);
 157                 // even if the language calls for RtL, don't do that
 158                 setLayoutDirection(Qt::LeftToRight);
 159                 LYXERR(Debug::GUI)
 160                         << "Successfully installed Qt translations for locale "
 161                         << fromqstr(language_name) << std::endl;
 162         } else
 163                 LYXERR(Debug::GUI)
 164                         << "Could not find  Qt translations for locale "
 165                         << fromqstr(language_name) << std::endl;
 166
 167 #ifdef Q_WS_MACX
 168         // This allows to translate the strings that appear in the LyX menu.
 169         addMenuTranslator();
 170 #endif
 171
 172         using namespace lyx::graphics;
 173
 174         Image::newImage = boost::bind(&GuiImage::newImage);
 175         Image::loadableFormats = boost::bind(&GuiImage::loadableFormats);
 176
 177         // needs to be done before reading lyxrc
 178         QWidget w;
 179         lyxrc.dpi = (w.logicalDpiX() + w.logicalDpiY()) / 2;
 180
 181         LoaderQueue::setPriority(10,100);
 182
 183         guiApp = this;
 184
 185         // Set the cache to 5120 kilobytes which corresponds to screen size of
 186         // 1280 by 1024 pixels with a color depth of 32 bits.
 187         QPixmapCache::setCacheLimit(5120);
 188 }
 189
 190
 191 GuiApplication::~GuiApplication()
 192 {
 193         socket_notifiers_.clear();
 194 }
 195
 196
 197 LyXView & GuiApplication::createView(unsigned int width,
 198                                   unsigned int height,
 199                                   int posx, int posy,
 200                                   int maximized,
 201                                   unsigned int iconSizeXY,
 202                                   const std::string & geometryArg)
 203 {
 204         int const id = gui_.createRegisteredView();
 205         GuiView & view = static_cast<GuiView &>(gui_.view(id));
 206         theLyXFunc().setLyXView(&view);
 207
 208         view.init();
 209         view.setGeometry(width, height, posx, posy, GuiView::Maximized(maximized),
 210                 iconSizeXY, geometryArg);
 211
 212         view.setFocus();
 213
 214         setCurrentView(view);
 215
 216         return view;
 217 }
 218
 219
 220
 221
 222 Clipboard & GuiApplication::clipboard()
 223 {
 224         return clipboard_;
 225 }
 226
 227
 228 Selection & GuiApplication::selection()
 229 {
 230         return selection_;
 231 }
 232
 233
 234 int GuiApplication::exec()
 235 {
 236         QTimer::singleShot(1, this, SLOT(execBatchCommands()));
 237         return QApplication::exec();
 238 }
 239
 240
 241 void GuiApplication::exit(int status)
 242 {
 243         QApplication::exit(status);
 244 }
 245
 246
 247 void GuiApplication::execBatchCommands()
 248 {
 249         LyX::ref().execBatchCommands();
 250 }
 251
 252
 253 string const GuiApplication::romanFontName()
 254 {
 255         QFont font;
 256         font.setKerning(false);
 257         font.setStyleHint(QFont::Serif);
 258         font.setFamily("serif");
 259
 260         return fromqstr(QFontInfo(font).family());
 261 }
 262
 263
 264 string const GuiApplication::sansFontName()
 265 {
 266         QFont font;
 267         font.setKerning(false);
 268         font.setStyleHint(QFont::SansSerif);
 269         font.setFamily("sans");
 270
 271         return fromqstr(QFontInfo(font).family());
 272 }
 273
 274
 275 string const GuiApplication::typewriterFontName()
 276 {
 277         QFont font;
 278         font.setKerning(false);
 279         font.setStyleHint(QFont::TypeWriter);
 280         font.setFamily("monospace");
 281
 282         return fromqstr(QFontInfo(font).family());
 283 }
 284
 285
 286 bool GuiApplication::event(QEvent * e)
 287 {
 288         switch(e->type()) {
 289         case QEvent::FileOpen: {
 290                 // Open a file; this happens only on Mac OS X for now
 291                 QFileOpenEvent * foe = static_cast<QFileOpenEvent *>(e);
 292
 293                 if (!currentView() || !currentView()->view())
 294                         // The application is not properly initialized yet.
 295                         // So we acknowledge the event and delay the file opening
 296                         // until LyX is ready.
 297                         // FIXME UNICODE: FileName accept an utf8 encoded string.
 298                         LyX::ref().addFileToLoad(FileName(fromqstr(foe->file())));
 299                 else
 300                         lyx::dispatch(FuncRequest(LFUN_FILE_OPEN,
 301                                 qstring_to_ucs4(foe->file())));
 302
 303                 e->accept();
 304                 return true;
 305         }
 306         default:
 307                 return QApplication::event(e);
 308         }
 309 }
 310
 311
 312 bool GuiApplication::notify(QObject * receiver, QEvent * event)
 313 {
 314         try {
 315                 return QApplication::notify(receiver, event);
 316         }
 317         catch (support::ExceptionMessage const & e) {
 318                 if (e.type_ == support::ErrorException) {
 319                         Alert::error(e.title_, e.details_);
 320                         LyX::cref().emergencyCleanup();
 321                         QApplication::exit(1);
 322                 } else if (e.type_ == support::WarningException) {
 323                         Alert::warning(e.title_, e.details_);
 324                         return false;
 325                 }
 326         }
 327         catch (std::exception const & e) {
 328                 docstring s = _("LyX has caught an exception, it will now "
 329                         "attemp to save all unsaved documents and exit."
 330                         "\n\nException: ");
 331                 s += from_ascii(e.what());
 332                 Alert::error(_("Software exception Detected"), s);
 333                 LyX::cref().emergencyCleanup();
 334                 QApplication::exit(1);
 335         }
 336         catch (...) {
 337                 docstring s = _("LyX has caught some really weird exception, it will "
 338                         "now attemp to save all unsaved documents and exit.");
 339                 Alert::error(_("Software exception Detected"), s);
 340                 LyX::cref().emergencyCleanup();
 341                 QApplication::exit(1);
 342         }
 343
 344         return false;
 345 }
 346
 347
 348 void GuiApplication::syncEvents()
 349 {
 350         // This is the ONLY place where processEvents may be called.
 351         // During screen update/ redraw, this method is disabled to
 352         // prevent keyboard events being handed to the LyX core, where
 353         // they could cause re-entrant calls to screen update.
 354         processEvents(QEventLoop::ExcludeUserInputEvents);
 355 }
 356
 357
 358 bool GuiApplication::getRgbColor(ColorCode col, RGBColor & rgbcol)
 359 {
 360         QColor const & qcol = color_cache_.get(col);
 361         if (!qcol.isValid()) {
 362                 rgbcol.r = 0;
 363                 rgbcol.g = 0;
 364                 rgbcol.b = 0;
 365                 return false;
 366         }
 367         rgbcol.r = qcol.red();
 368         rgbcol.g = qcol.green();
 369         rgbcol.b = qcol.blue();
 370         return true;
 371 }
 372
 373
 374 string const GuiApplication::hexName(ColorCode col)
 375 {
 376         return support::ltrim(fromqstr(color_cache_.get(col).name()), "#");
 377 }
 378
 379
 380 void GuiApplication::updateColor(ColorCode)
 381 {
 382         // FIXME: Bleh, can't we just clear them all at once ?
 383         color_cache_.clear();
 384 }
 385
 386
 387 void GuiApplication::registerSocketCallback(int fd, SocketCallback func)
 388 {
 389         SocketNotifier * sn = new SocketNotifier(this, fd, func);
 390         socket_notifiers_[fd] = sn;
 391         connect(sn, SIGNAL(activated(int)), this, SLOT(socketDataReceived(int)));
 392 }
 393
 394
 395 void GuiApplication::socketDataReceived(int fd)
 396 {
 397         socket_notifiers_[fd]->func_();
 398 }
 399
 400
 401 void GuiApplication::unregisterSocketCallback(int fd)
 402 {
 403         socket_notifiers_.erase(fd);
 404 }
 405
 406
 407 void GuiApplication::commitData(QSessionManager & sm)
 408 {
 409         /// The implementation is required to avoid an application exit
 410         /// when session state save is triggered by session manager.
 411         /// The default implementation sends a close event to all
 412         /// visible top level widgets when session managment allows
 413         /// interaction.
 414         /// We are changing that to write all unsaved buffers...
 415         if (sm.allowsInteraction() && !theBufferList().quitWriteAll())
 416                 sm.cancel();
 417 }
 418
 419
 420 ////////////////////////////////////////////////////////////////////////
 421 // X11 specific stuff goes here...
 422 #ifdef Q_WS_X11
 423 bool GuiApplication::x11EventFilter(XEvent * xev)
 424 {
 425         if (!currentView())
 426                 return false;
 427
 428         switch (xev->type) {
 429         case SelectionRequest: {
 430                 if (xev->xselectionrequest.selection != XA_PRIMARY)
 431                         break;
 432                 LYXERR(Debug::GUI) << "X requested selection." << endl;
 433                 BufferView * bv = currentView()->view();
 434                 if (bv) {
 435                         docstring const sel = bv->requestSelection();
 436                         if (!sel.empty())
 437                                 selection_.put(sel);
 438                 }
 439                 break;
 440         }
 441         case SelectionClear: {
 442                 if (xev->xselectionclear.selection != XA_PRIMARY)
 443                         break;
 444                 LYXERR(Debug::GUI) << "Lost selection." << endl;
 445                 BufferView * bv = currentView()->view();
 446                 if (bv)
 447                         bv->clearSelection();
 448                 break;
 449         }
 450         }
 451         return false;
 452 }
 453 #endif
 454
 455 void GuiApplication::addMenuTranslator()
 456 {
 457         installTranslator(new MenuTranslator(this));
 458 }
 459
 460
 461 } // namespace frontend
 462 } // namespace lyx
 463
 464 #include "GuiApplication_moc.cpp"