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 "qt_helpers.h"
  18 #include "GuiImage.h"
  19 #include "GuiKeySymbol.h"
  20 #include "GuiView.h"
  21
  22 #include "frontends/alert.h"
  23 #include "frontends/Application.h"
  24 #include "frontends/FontLoader.h"
  25 #include "frontends/FontMetrics.h"
  26
  27 #include "Buffer.h"
  28 #include "BufferList.h"
  29 #include "BufferView.h"
  30 #include "Font.h"
  31 #include "FuncRequest.h"
  32 #include "FuncStatus.h"
  33 #include "LyX.h"
  34 #include "LyXFunc.h"
  35 #include "LyXRC.h"
  36 #include "Session.h"
  37 #include "version.h"
  38
  39 #include "support/debug.h"
  40 #include "support/ExceptionMessage.h"
  41 #include "support/FileName.h"
  42 #include "support/ForkedCalls.h"
  43 #include "support/gettext.h"
  44 #include "support/lstrings.h"
  45 #include "support/os.h"
  46 #include "support/Package.h"
  47
  48 #include <QApplication>
  49 #include <QClipboard>
  50 #include <QEventLoop>
  51 #include <QFileOpenEvent>
  52 #include <QLocale>
  53 #include <QLibraryInfo>
  54 #include <QMenuBar>
  55 #include <QPixmapCache>
  56 #include <QRegExp>
  57 #include <QSessionManager>
  58 #include <QSocketNotifier>
  59 #include <QTextCodec>
  60 #include <QTimer>
  61 #include <QTranslator>
  62 #include <QWidget>
  63
  64 #ifdef Q_WS_X11
  65 #include <X11/Xatom.h>
  66 #include <X11/Xlib.h>
  67 #undef CursorShape
  68 #undef None
  69 #endif
  70
  71 #include <boost/bind.hpp>
  72
  73 #include <exception>
  74
  75 using namespace std;
  76 using namespace lyx::support;
  77
  78 namespace lyx {
  79
  80 frontend::Application * createApplication(int & argc, char * argv[])
  81 {
  82         return new frontend::GuiApplication(argc, argv);
  83 }
  84
  85
  86 namespace frontend {
  87
  88 class SocketNotifier : public QSocketNotifier
  89 {
  90 public:
  91         /// connect a connection notification from the LyXServerSocket
  92         SocketNotifier(QObject * parent, int fd, Application::SocketCallback func)
  93                 : QSocketNotifier(fd, QSocketNotifier::Read, parent), func_(func)
  94         {}
  95
  96 public:
  97         /// The callback function
  98         Application::SocketCallback func_;
  99 };
 100
 101
 102 ////////////////////////////////////////////////////////////////////////
 103 // Mac specific stuff goes here...
 104
 105 class MenuTranslator : public QTranslator
 106 {
 107 public:
 108         MenuTranslator(QObject * parent)
 109                 : QTranslator(parent)
 110         {}
 111
 112         QString translate(const char * /*context*/,
 113           const char * sourceText,
 114           const char * /*comment*/ = 0)
 115         {
 116                 string const s = sourceText;
 117                 if (s == N_("About %1") || s == N_("Preferences")
 118                                 || s == N_("Reconfigure") || s == N_("Quit %1"))
 119                         return qt_(s);
 120                 else
 121                         return QString();
 122         }
 123 };
 124
 125 class GlobalMenuBar : public QMenuBar
 126 {
 127 public:
 128         ///
 129         GlobalMenuBar() : QMenuBar(0) {}
 130
 131         ///
 132         bool event(QEvent * e)
 133         {
 134                 if (e->type() == QEvent::ShortcutOverride) {
 135                         //          && activeWindow() == 0) {
 136                         QKeyEvent * ke = static_cast<QKeyEvent*>(e);
 137                         KeySymbol sym;
 138                         setKeySymbol(&sym, ke);
 139                         theLyXFunc().processKeySym(sym, q_key_state(ke->modifiers()));
 140                         e->accept();
 141                         return true;
 142                 }
 143                 return false;
 144         }
 145 };
 146
 147 ///////////////////////////////////////////////////////////////
 148 // You can find more platform specific stuff
 149 // at the end of this file...
 150 ///////////////////////////////////////////////////////////////
 151
 152
 153 GuiApplication * guiApp;
 154
 155
 156 GuiApplication::GuiApplication(int & argc, char ** argv)
 157         : QApplication(argc, argv), Application(), current_view_(0), global_menubar_(0)
 158 {
 159         QString app_name = "LyX";
 160         QCoreApplication::setOrganizationName(app_name);
 161         QCoreApplication::setOrganizationDomain("lyx.org");
 162         QCoreApplication::setApplicationName(app_name + "-" + lyx_version);
 163
 164         // FIXME: quitOnLastWindowClosed is true by default. We should have a
 165         // lyxrc setting for this in order to let the application stay resident.
 166         // But then we need some kind of dock icon, at least on Windows.
 167         /*
 168         if (lyxrc.quit_on_last_window_closed)
 169                 setQuitOnLastWindowClosed(false);
 170         */
 171 #ifdef Q_WS_MAC
 172         // FIXME: Do we need a lyxrc setting for this on Mac? This behaviour
 173         // seems to be the default case for applications like LyX.
 174         setQuitOnLastWindowClosed(false);
 175 #endif
 176
 177 #ifdef Q_WS_X11
 178         // doubleClickInterval() is 400 ms on X11 which is just too long.
 179         // On Windows and Mac OS X, the operating system's value is used.
 180         // On Microsoft Windows, calling this function sets the double
 181         // click interval for all applications. So we don't!
 182         QApplication::setDoubleClickInterval(300);
 183 #endif
 184
 185         // install translation file for Qt built-in dialogs
 186         QString language_name = QString("qt_") + QLocale::system().name();
 187
 188         // language_name can be short (e.g. qt_zh) or long (e.g. qt_zh_CN).
 189         // Short-named translator can be loaded from a long name, but not the
 190         // opposite. Therefore, long name should be used without truncation.
 191         // c.f. http://doc.trolltech.com/4.1/qtranslator.html#load
 192         if (qt_trans_.load(language_name,
 193                 QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
 194         {
 195                 installTranslator(&qt_trans_);
 196                 // even if the language calls for RtL, don't do that
 197                 setLayoutDirection(Qt::LeftToRight);
 198                 LYXERR(Debug::GUI, "Successfully installed Qt translations for locale "
 199                         << fromqstr(language_name));
 200         } else
 201                 LYXERR(Debug::GUI, "Could not find  Qt translations for locale "
 202                         << fromqstr(language_name));
 203
 204 #ifdef Q_WS_MACX
 205         // This allows to translate the strings that appear in the LyX menu.
 206         addMenuTranslator();
 207 #endif
 208         connect(this, SIGNAL(lastWindowClosed()), this, SLOT(onLastWindowClosed()));
 209
 210         using namespace lyx::graphics;
 211
 212         Image::newImage = boost::bind(&GuiImage::newImage);
 213         Image::loadableFormats = boost::bind(&GuiImage::loadableFormats);
 214
 215         // needs to be done before reading lyxrc
 216         QWidget w;
 217         lyxrc.dpi = (w.logicalDpiX() + w.logicalDpiY()) / 2;
 218
 219         guiApp = this;
 220
 221         // Set the cache to 5120 kilobytes which corresponds to screen size of
 222         // 1280 by 1024 pixels with a color depth of 32 bits.
 223         QPixmapCache::setCacheLimit(5120);
 224
 225         // Initialize RC Fonts
 226         if (lyxrc.roman_font_name.empty())
 227                 lyxrc.roman_font_name = fromqstr(romanFontName());
 228
 229         if (lyxrc.sans_font_name.empty())
 230                 lyxrc.sans_font_name = fromqstr(sansFontName());
 231
 232         if (lyxrc.typewriter_font_name.empty())
 233                 lyxrc.typewriter_font_name = fromqstr(typewriterFontName());
 234
 235         general_timer_.setInterval(500);
 236         connect(&general_timer_, SIGNAL(timeout()),
 237                 this, SLOT(handleRegularEvents()));
 238         general_timer_.start();
 239
 240 #ifdef Q_WS_MACX
 241         if (global_menubar_ == 0) {
 242                 // Create the global default menubar which is shown for the dialogs
 243                 // and if no GuiView is visible.
 244                 global_menubar_ = new GlobalMenuBar();
 245         }
 246 #endif
 247 }
 248
 249
 250 GuiApplication::~GuiApplication()
 251 {
 252         socket_notifiers_.clear();
 253 }
 254
 255
 256 FuncStatus GuiApplication::getStatus(FuncRequest const & cmd)
 257 {
 258         FuncStatus flag;
 259         bool enable = true;
 260
 261         switch(cmd.action) {
 262
 263         case LFUN_WINDOW_CLOSE:
 264                 enable = view_ids_.size() > 0;
 265                 break;
 266
 267         default:
 268                 if (!current_view_) {
 269                         enable = false;
 270                         break;
 271                 }
 272         }
 273
 274         if (!enable)
 275                 flag.enabled(false);
 276
 277         return flag;
 278 }
 279
 280
 281 bool GuiApplication::dispatch(FuncRequest const & cmd)
 282 {
 283         switch(cmd.action) {
 284
 285         case LFUN_WINDOW_NEW:
 286                 createView(toqstr(cmd.argument()));
 287                 break;
 288
 289         case LFUN_WINDOW_CLOSE:
 290                 // update bookmark pit of the current buffer before window close
 291                 for (size_t i = 0; i < LyX::ref().session().bookmarks().size(); ++i)
 292                         theLyXFunc().gotoBookmark(i+1, false, false);
 293                 current_view_->close();
 294                 break;
 295
 296         case LFUN_LYX_QUIT:
 297                 // quitting is triggered by the gui code
 298                 // (leaving the event loop).
 299                 if (current_view_)
 300                         current_view_->message(from_utf8(N_("Exiting.")));
 301                 if (closeAllViews())
 302                         quit();
 303                 break;
 304
 305         case LFUN_SCREEN_FONT_UPDATE: {
 306                 // handle the screen font changes.
 307                 font_loader_.update();
 308                 // Backup current_view_
 309                 GuiView * view = current_view_;
 310                 // Set current_view_ to zero to forbid GuiWorkArea::redraw()
 311                 // to skip the refresh.
 312                 current_view_ = 0;
 313                 BufferList::iterator it = theBufferList().begin();
 314                 BufferList::iterator const end = theBufferList().end();
 315                 for (; it != end; ++it)
 316                         (*it)->changed();
 317                 // Restore current_view_
 318                 current_view_ = view;
 319                 break;
 320         }
 321
 322         case LFUN_BUFFER_NEW:
 323                 if (viewCount() == 0
 324                     || (!lyxrc.open_buffers_in_tabs && current_view_->buffer() != 0)) {
 325                         createView(QString(), false); // keep hidden
 326                         current_view_->newDocument(to_utf8(cmd.argument()), false);
 327                         current_view_->show();
 328                         setActiveWindow(current_view_);
 329                 } else
 330                         current_view_->newDocument(to_utf8(cmd.argument()), false);
 331                 break;
 332
 333         case LFUN_BUFFER_NEW_TEMPLATE:
 334                 if (viewCount() == 0
 335                     || (!lyxrc.open_buffers_in_tabs && current_view_->buffer() != 0)) {
 336                         createView();
 337                         current_view_->newDocument(to_utf8(cmd.argument()), true);
 338                         if (!current_view_->buffer())
 339                                 current_view_->close();
 340                 } else
 341                         current_view_->newDocument(to_utf8(cmd.argument()), true);
 342                 break;
 343
 344         case LFUN_FILE_OPEN:
 345                 if (viewCount() == 0
 346                     || (!lyxrc.open_buffers_in_tabs && current_view_->buffer() != 0)) {
 347                         createView();
 348                         current_view_->openDocument(to_utf8(cmd.argument()));
 349                         if (!current_view_->buffer())
 350                                 current_view_->close();
 351                 } else
 352                         current_view_->openDocument(to_utf8(cmd.argument()));
 353                 break;
 354
 355         default:
 356                 // Notify the caller that the action has not been dispatched.
 357                 return false;
 358         }
 359
 360         // The action has been dispatched.
 361         return true;
 362 }
 363
 364
 365 void GuiApplication::resetGui()
 366 {
 367         map<int, GuiView *>::iterator it;
 368         for (it = views_.begin(); it != views_.end(); ++it)
 369                 it->second->resetDialogs();
 370
 371         dispatch(FuncRequest(LFUN_SCREEN_FONT_UPDATE));
 372 }
 373
 374
 375 static void updateIds(map<int, GuiView *> const & stdmap, vector<int> & ids)
 376 {
 377         ids.clear();
 378         map<int, GuiView *>::const_iterator it;
 379         for (it = stdmap.begin(); it != stdmap.end(); ++it)
 380                 ids.push_back(it->first);
 381 }
 382
 383
 384 void GuiApplication::createView(QString const & geometry_arg, bool autoShow)
 385 {
 386         // release the keyboard which might have been grabed by the global
 387         // menubar on Mac to catch shortcuts even without any GuiView.
 388         if (global_menubar_)
 389                 global_menubar_->releaseKeyboard();
 390
 391         // create new view
 392         updateIds(views_, view_ids_);
 393         int id = 0;
 394         while (views_.find(id) != views_.end())
 395                 id++;
 396         GuiView * view = new GuiView(id);
 397
 398         // copy the icon size from old view
 399         if (viewCount() > 0)
 400                 view->setIconSize(current_view_->iconSize());
 401
 402         // register view
 403         views_[id] = view;
 404         updateIds(views_, view_ids_);
 405
 406         if (autoShow) {
 407                 view->show();
 408                 setActiveWindow(view);
 409         }
 410
 411         if (!geometry_arg.isEmpty()) {
 412 #ifdef Q_WS_WIN
 413                 int x, y;
 414                 int w, h;
 415                 QRegExp re( "[=]*(?:([0-9]+)[xX]([0-9]+)){0,1}[ ]*(?:([+-][0-9]*)([+-][0-9]*)){0,1}" );
 416                 re.indexIn(geometry_arg);
 417                 w = re.cap(1).toInt();
 418                 h = re.cap(2).toInt();
 419                 x = re.cap(3).toInt();
 420                 y = re.cap(4).toInt();
 421                 view->setGeometry(x, y, w, h);
 422 #endif
 423         }
 424         view->setFocus();
 425         setCurrentView(view);
 426 }
 427
 428
 429
 430
 431 Clipboard & GuiApplication::clipboard()
 432 {
 433         return clipboard_;
 434 }
 435
 436
 437 Selection & GuiApplication::selection()
 438 {
 439         return selection_;
 440 }
 441
 442
 443 int GuiApplication::exec()
 444 {
 445         QTimer::singleShot(1, this, SLOT(execBatchCommands()));
 446         return QApplication::exec();
 447 }
 448
 449
 450 void GuiApplication::exit(int status)
 451 {
 452         QApplication::exit(status);
 453 }
 454
 455
 456 void GuiApplication::execBatchCommands()
 457 {
 458         LyX::ref().execBatchCommands();
 459 }
 460
 461
 462 void GuiApplication::restoreGuiSession()
 463 {
 464         if (!lyxrc.load_session)
 465                 return;
 466
 467         Session & session = LyX::ref().session();
 468         vector<FileName> const & lastopened = session.lastOpened().getfiles();
 469         // do not add to the lastfile list since these files are restored from
 470         // last session, and should be already there (regular files), or should
 471         // not be added at all (help files).
 472         for_each(lastopened.begin(), lastopened.end(),
 473                 bind(&GuiView::loadDocument, current_view_, _1, false));
 474
 475         // clear this list to save a few bytes of RAM
 476         session.lastOpened().clear();
 477 }
 478
 479
 480 QString const GuiApplication::romanFontName()
 481 {
 482         QFont font;
 483         font.setKerning(false);
 484         font.setStyleHint(QFont::Serif);
 485         font.setFamily("serif");
 486
 487         return QFontInfo(font).family();
 488 }
 489
 490
 491 QString const GuiApplication::sansFontName()
 492 {
 493         QFont font;
 494         font.setKerning(false);
 495         font.setStyleHint(QFont::SansSerif);
 496         font.setFamily("sans");
 497
 498         return QFontInfo(font).family();
 499 }
 500
 501
 502 QString const GuiApplication::typewriterFontName()
 503 {
 504         QFont font;
 505         font.setKerning(false);
 506         font.setStyleHint(QFont::TypeWriter);
 507         font.setFamily("monospace");
 508
 509         return QFontInfo(font).family();
 510 }
 511
 512
 513 void GuiApplication::handleRegularEvents()
 514 {
 515         ForkedCallsController::handleCompletedProcesses();
 516 }
 517
 518
 519 bool GuiApplication::event(QEvent * e)
 520 {
 521         switch(e->type()) {
 522         case QEvent::FileOpen: {
 523                 // Open a file; this happens only on Mac OS X for now
 524                 QFileOpenEvent * foe = static_cast<QFileOpenEvent *>(e);
 525
 526                 if (!current_view_ || !current_view_->view())
 527                         // The application is not properly initialized yet.
 528                         // So we acknowledge the event and delay the file opening
 529                         // until LyX is ready.
 530                         // FIXME UNICODE: FileName accept an utf8 encoded string.
 531                         LyX::ref().addFileToLoad(fromqstr(foe->file()));
 532                 else
 533                         lyx::dispatch(FuncRequest(LFUN_FILE_OPEN,
 534                                 qstring_to_ucs4(foe->file())));
 535
 536                 e->accept();
 537                 return true;
 538         }
 539         default:
 540                 return QApplication::event(e);
 541         }
 542 }
 543
 544
 545 bool GuiApplication::notify(QObject * receiver, QEvent * event)
 546 {
 547         try {
 548                 return QApplication::notify(receiver, event);
 549         }
 550         catch (ExceptionMessage const & e) {
 551                 switch(e.type_) {
 552                 case ErrorException:
 553                         LyX::cref().emergencyCleanup();
 554                         setQuitOnLastWindowClosed(false);
 555                         closeAllViews();
 556                         Alert::error(e.title_, e.details_);
 557 #ifndef NDEBUG
 558                         // Properly crash in debug mode in order to get a useful backtrace.
 559                         abort();
 560 #endif
 561                         // In release mode, try to exit gracefully.
 562                         this->exit(1);
 563
 564                 case BufferException: {
 565                         Buffer * buf = current_view_->buffer();
 566                         docstring details = e.details_ + '\n';
 567                         details += theBufferList().emergencyWrite(buf);
 568                         theBufferList().release(buf);
 569                         details += "\n" + _("The current document was closed.");
 570                         Alert::error(e.title_, details);
 571                         return false;
 572                 }
 573                 case WarningException:
 574                         Alert::warning(e.title_, e.details_);
 575                         return false;
 576                 };
 577         }
 578         catch (exception const & e) {
 579                 docstring s = _("LyX has caught an exception, it will now "
 580                         "attempt to save all unsaved documents and exit."
 581                         "\n\nException: ");
 582                 s += from_ascii(e.what());
 583                 Alert::error(_("Software exception Detected"), s);
 584                 LyX::cref().exit(1);
 585         }
 586         catch (...) {
 587                 docstring s = _("LyX has caught some really weird exception, it will "
 588                         "now attempt to save all unsaved documents and exit.");
 589                 Alert::error(_("Software exception Detected"), s);
 590                 LyX::cref().exit(1);
 591         }
 592
 593         return false;
 594 }
 595
 596
 597 bool GuiApplication::getRgbColor(ColorCode col, RGBColor & rgbcol)
 598 {
 599         QColor const & qcol = color_cache_.get(col);
 600         if (!qcol.isValid()) {
 601                 rgbcol.r = 0;
 602                 rgbcol.g = 0;
 603                 rgbcol.b = 0;
 604                 return false;
 605         }
 606         rgbcol.r = qcol.red();
 607         rgbcol.g = qcol.green();
 608         rgbcol.b = qcol.blue();
 609         return true;
 610 }
 611
 612
 613 string const GuiApplication::hexName(ColorCode col)
 614 {
 615         return ltrim(fromqstr(color_cache_.get(col).name()), "#");
 616 }
 617
 618
 619 void GuiApplication::updateColor(ColorCode)
 620 {
 621         // FIXME: Bleh, can't we just clear them all at once ?
 622         color_cache_.clear();
 623 }
 624
 625
 626 void GuiApplication::registerSocketCallback(int fd, SocketCallback func)
 627 {
 628         SocketNotifier * sn = new SocketNotifier(this, fd, func);
 629         socket_notifiers_[fd] = sn;
 630         connect(sn, SIGNAL(activated(int)), this, SLOT(socketDataReceived(int)));
 631 }
 632
 633
 634 void GuiApplication::socketDataReceived(int fd)
 635 {
 636         socket_notifiers_[fd]->func_();
 637 }
 638
 639
 640 void GuiApplication::unregisterSocketCallback(int fd)
 641 {
 642         socket_notifiers_.erase(fd);
 643 }
 644
 645
 646 void GuiApplication::commitData(QSessionManager & sm)
 647 {
 648         /// The implementation is required to avoid an application exit
 649         /// when session state save is triggered by session manager.
 650         /// The default implementation sends a close event to all
 651         /// visible top level widgets when session managment allows
 652         /// interaction.
 653         /// We are changing that to close all wiew one by one.
 654         /// FIXME: verify if the default implementation is enough now.
 655         if (sm.allowsInteraction() && !closeAllViews())
 656                 sm.cancel();
 657 }
 658
 659
 660 void GuiApplication::addMenuTranslator()
 661 {
 662         installTranslator(new MenuTranslator(this));
 663 }
 664
 665
 666 bool GuiApplication::unregisterView(int id)
 667 {
 668         updateIds(views_, view_ids_);
 669         BOOST_ASSERT(views_.find(id) != views_.end());
 670         BOOST_ASSERT(views_[id]);
 671
 672         map<int, GuiView *>::iterator it;
 673         for (it = views_.begin(); it != views_.end(); ++it) {
 674                 if (it->first == id) {
 675                         views_.erase(id);
 676                         break;
 677                 }
 678         }
 679         updateIds(views_, view_ids_);
 680         return true;
 681 }
 682
 683
 684 bool GuiApplication::closeAllViews()
 685 {
 686         updateIds(views_, view_ids_);
 687         if (views_.empty())
 688                 return true;
 689
 690         map<int, GuiView*> const cmap = views_;
 691         map<int, GuiView*>::const_iterator it;
 692         for (it = cmap.begin(); it != cmap.end(); ++it) {
 693                 if (!it->second->close())
 694                         return false;
 695         }
 696
 697         views_.clear();
 698         view_ids_.clear();
 699         return true;
 700 }
 701
 702
 703 GuiView & GuiApplication::view(int id) const
 704 {
 705         BOOST_ASSERT(views_.find(id) != views_.end());
 706         return *views_.find(id)->second;
 707 }
 708
 709
 710 void GuiApplication::hideDialogs(string const & name, Inset * inset) const
 711 {
 712         vector<int>::const_iterator it = view_ids_.begin();
 713         vector<int>::const_iterator const end = view_ids_.end();
 714         for (; it != end; ++it)
 715                 view(*it).hideDialog(name, inset);
 716 }
 717
 718
 719 Buffer const * GuiApplication::updateInset(Inset const * inset) const
 720 {
 721         Buffer const * buffer_ = 0;
 722         vector<int>::const_iterator it = view_ids_.begin();
 723         vector<int>::const_iterator const end = view_ids_.end();
 724         for (; it != end; ++it) {
 725                 Buffer const * ptr = view(*it).updateInset(inset);
 726                 if (ptr)
 727                         buffer_ = ptr;
 728         }
 729         return buffer_;
 730 }
 731
 732
 733 void GuiApplication::readMenus(Lexer & lex)
 734 {
 735         menus().read(lex);
 736 }
 737
 738
 739 bool GuiApplication::searchMenu(FuncRequest const & func,
 740         vector<docstring> & names) const
 741 {
 742         return menus().searchMenu(func, names);
 743 }
 744
 745
 746 void GuiApplication::initGlobalMenu()
 747 {
 748         if (global_menubar_)
 749                 menus().fillMenuBar(global_menubar_, 0, true);
 750 }
 751
 752
 753 void GuiApplication::onLastWindowClosed()
 754 {
 755         if (global_menubar_)
 756                 global_menubar_->grabKeyboard();
 757 }
 758
 759 ////////////////////////////////////////////////////////////////////////
 760 // X11 specific stuff goes here...
 761 #ifdef Q_WS_X11
 762 bool GuiApplication::x11EventFilter(XEvent * xev)
 763 {
 764         if (!current_view_)
 765                 return false;
 766
 767         switch (xev->type) {
 768         case SelectionRequest: {
 769                 if (xev->xselectionrequest.selection != XA_PRIMARY)
 770                         break;
 771                 LYXERR(Debug::GUI, "X requested selection.");
 772                 BufferView * bv = current_view_->view();
 773                 if (bv) {
 774                         docstring const sel = bv->requestSelection();
 775                         if (!sel.empty())
 776                                 selection_.put(sel);
 777                 }
 778                 break;
 779         }
 780         case SelectionClear: {
 781                 if (xev->xselectionclear.selection != XA_PRIMARY)
 782                         break;
 783                 LYXERR(Debug::GUI, "Lost selection.");
 784                 BufferView * bv = current_view_->view();
 785                 if (bv)
 786                         bv->clearSelection();
 787                 break;
 788         }
 789         }
 790         return false;
 791 }
 792 #endif
 793
 794 } // namespace frontend
 795
 796
 797 ////////////////////////////////////////////////////////////////////
 798 //
 799 // Font stuff
 800 //
 801 ////////////////////////////////////////////////////////////////////
 802
 803 frontend::FontLoader & theFontLoader()
 804 {
 805         BOOST_ASSERT(frontend::guiApp);
 806         return frontend::guiApp->fontLoader();
 807 }
 808
 809
 810 frontend::FontMetrics const & theFontMetrics(Font const & f)
 811 {
 812         return theFontMetrics(f.fontInfo());
 813 }
 814
 815
 816 frontend::FontMetrics const & theFontMetrics(FontInfo const & f)
 817 {
 818         BOOST_ASSERT(frontend::guiApp);
 819         return frontend::guiApp->fontLoader().metrics(f);
 820 }
 821
 822
 823 frontend::Clipboard & theClipboard()
 824 {
 825         BOOST_ASSERT(frontend::guiApp);
 826         return frontend::guiApp->clipboard();
 827 }
 828
 829
 830 frontend::Selection & theSelection()
 831 {
 832         BOOST_ASSERT(frontend::guiApp);
 833         return frontend::guiApp->selection();
 834 }
 835
 836 } // namespace lyx
 837
 838 #include "GuiApplication_moc.cpp"