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                 current_view_->message(from_utf8(N_("Exiting.")));
 300                 if (closeAllViews())
 301                         quit();
 302                 break;
 303
 304         case LFUN_SCREEN_FONT_UPDATE: {
 305                 // handle the screen font changes.
 306                 font_loader_.update();
 307                 // Backup current_view_
 308                 GuiView * view = current_view_;
 309                 // Set current_view_ to zero to forbid GuiWorkArea::redraw()
 310                 // to skip the refresh.
 311                 current_view_ = 0;
 312                 BufferList::iterator it = theBufferList().begin();
 313                 BufferList::iterator const end = theBufferList().end();
 314                 for (; it != end; ++it)
 315                         (*it)->changed();
 316                 // Restore current_view_
 317                 current_view_ = view;
 318                 break;
 319         }
 320
 321         case LFUN_BUFFER_NEW:
 322                 if (viewCount() == 0
 323                     || (!lyxrc.open_buffers_in_tabs && current_view_->buffer() != 0))
 324                         createView();
 325                 current_view_->newDocument(to_utf8(cmd.argument()), false);
 326                 break;
 327
 328         case LFUN_BUFFER_NEW_TEMPLATE:
 329                 if (viewCount() == 0
 330                     || (!lyxrc.open_buffers_in_tabs && current_view_->buffer() != 0)) {
 331                         createView();
 332                         current_view_->newDocument(to_utf8(cmd.argument()), true);
 333                         if (!current_view_->buffer())
 334                                 current_view_->close();
 335                 } else
 336                         current_view_->newDocument(to_utf8(cmd.argument()), true);
 337                 break;
 338
 339         case LFUN_FILE_OPEN:
 340                 if (viewCount() == 0
 341                     || (!lyxrc.open_buffers_in_tabs && current_view_->buffer() != 0)) {
 342                         createView();
 343                         current_view_->openDocument(to_utf8(cmd.argument()));
 344                         if (!current_view_->buffer())
 345                                 current_view_->close();
 346                 } else
 347                         current_view_->openDocument(to_utf8(cmd.argument()));
 348                 break;
 349
 350         default:
 351                 // Notify the caller that the action has not been dispatched.
 352                 return false;
 353         }
 354
 355         // The action has been dispatched.
 356         return true;
 357 }
 358
 359
 360 void GuiApplication::resetGui()
 361 {
 362         map<int, GuiView *>::iterator it;
 363         for (it = views_.begin(); it != views_.end(); ++it)
 364                 it->second->resetDialogs();
 365
 366         dispatch(FuncRequest(LFUN_SCREEN_FONT_UPDATE));
 367 }
 368
 369
 370 static void updateIds(map<int, GuiView *> const & stdmap, vector<int> & ids)
 371 {
 372         ids.clear();
 373         map<int, GuiView *>::const_iterator it;
 374         for (it = stdmap.begin(); it != stdmap.end(); ++it)
 375                 ids.push_back(it->first);
 376 }
 377
 378
 379 void GuiApplication::createView(QString const & geometry_arg)
 380 {
 381         if (global_menubar_)
 382                 global_menubar_->releaseKeyboard();
 383
 384         // create new view
 385         updateIds(views_, view_ids_);
 386         int id = 0;
 387         while (views_.find(id) != views_.end())
 388                 id++;
 389         GuiView * view = new GuiView(id);
 390
 391         // copy the icon size from old view
 392         if (viewCount() > 0)
 393                 view->setIconSize(current_view_->iconSize());
 394
 395         // register view
 396         views_[id] = view;
 397         updateIds(views_, view_ids_);
 398
 399         view->show();
 400         if (!geometry_arg.isEmpty()) {
 401 #ifdef Q_WS_WIN
 402                 int x, y;
 403                 int w, h;
 404                 QRegExp re( "[=]*(?:([0-9]+)[xX]([0-9]+)){0,1}[ ]*(?:([+-][0-9]*)([+-][0-9]*)){0,1}" );
 405                 re.indexIn(geometry_arg);
 406                 w = re.cap(1).toInt();
 407                 h = re.cap(2).toInt();
 408                 x = re.cap(3).toInt();
 409                 y = re.cap(4).toInt();
 410                 view->setGeometry(x, y, w, h);
 411 #endif
 412         }
 413         view->setFocus();
 414         setActiveWindow(view);
 415         setCurrentView(*view);
 416 }
 417
 418
 419
 420
 421 Clipboard & GuiApplication::clipboard()
 422 {
 423         return clipboard_;
 424 }
 425
 426
 427 Selection & GuiApplication::selection()
 428 {
 429         return selection_;
 430 }
 431
 432
 433 int GuiApplication::exec()
 434 {
 435         QTimer::singleShot(1, this, SLOT(execBatchCommands()));
 436         return QApplication::exec();
 437 }
 438
 439
 440 void GuiApplication::exit(int status)
 441 {
 442         QApplication::exit(status);
 443 }
 444
 445
 446 void GuiApplication::execBatchCommands()
 447 {
 448         LyX::ref().execBatchCommands();
 449 }
 450
 451
 452 void GuiApplication::restoreGuiSession()
 453 {
 454         if (!lyxrc.load_session)
 455                 return;
 456
 457         Session & session = LyX::ref().session();
 458         vector<FileName> const & lastopened = session.lastOpened().getfiles();
 459         // do not add to the lastfile list since these files are restored from
 460         // last session, and should be already there (regular files), or should
 461         // not be added at all (help files).
 462         for_each(lastopened.begin(), lastopened.end(),
 463                 bind(&GuiView::loadDocument, current_view_, _1, false));
 464
 465         // clear this list to save a few bytes of RAM
 466         session.lastOpened().clear();
 467 }
 468
 469
 470 QString const GuiApplication::romanFontName()
 471 {
 472         QFont font;
 473         font.setKerning(false);
 474         font.setStyleHint(QFont::Serif);
 475         font.setFamily("serif");
 476
 477         return QFontInfo(font).family();
 478 }
 479
 480
 481 QString const GuiApplication::sansFontName()
 482 {
 483         QFont font;
 484         font.setKerning(false);
 485         font.setStyleHint(QFont::SansSerif);
 486         font.setFamily("sans");
 487
 488         return QFontInfo(font).family();
 489 }
 490
 491
 492 QString const GuiApplication::typewriterFontName()
 493 {
 494         QFont font;
 495         font.setKerning(false);
 496         font.setStyleHint(QFont::TypeWriter);
 497         font.setFamily("monospace");
 498
 499         return QFontInfo(font).family();
 500 }
 501
 502
 503 void GuiApplication::handleRegularEvents()
 504 {
 505         ForkedCallsController::handleCompletedProcesses();
 506 }
 507
 508
 509 bool GuiApplication::event(QEvent * e)
 510 {
 511         switch(e->type()) {
 512         case QEvent::FileOpen: {
 513                 // Open a file; this happens only on Mac OS X for now
 514                 QFileOpenEvent * foe = static_cast<QFileOpenEvent *>(e);
 515
 516                 if (!current_view_ || !current_view_->view())
 517                         // The application is not properly initialized yet.
 518                         // So we acknowledge the event and delay the file opening
 519                         // until LyX is ready.
 520                         // FIXME UNICODE: FileName accept an utf8 encoded string.
 521                         LyX::ref().addFileToLoad(fromqstr(foe->file()));
 522                 else
 523                         lyx::dispatch(FuncRequest(LFUN_FILE_OPEN,
 524                                 qstring_to_ucs4(foe->file())));
 525
 526                 e->accept();
 527                 return true;
 528         }
 529         default:
 530                 return QApplication::event(e);
 531         }
 532 }
 533
 534
 535 bool GuiApplication::notify(QObject * receiver, QEvent * event)
 536 {
 537         try {
 538                 return QApplication::notify(receiver, event);
 539         }
 540         catch (ExceptionMessage const & e) {
 541                 switch(e.type_) {
 542                 case ErrorException:
 543                         LyX::cref().emergencyCleanup();
 544                         setQuitOnLastWindowClosed(false);
 545                         closeAllViews();
 546                         Alert::error(e.title_, e.details_);
 547 #ifndef NDEBUG
 548                         // Properly crash in debug mode in order to get a useful backtrace.
 549                         abort();
 550 #endif
 551                         // In release mode, try to exit gracefully.
 552                         this->exit(1);
 553
 554                 case BufferException: {
 555                         Buffer * buf = current_view_->buffer();
 556                         docstring details = e.details_ + '\n';
 557                         details += theBufferList().emergencyWrite(buf);
 558                         theBufferList().release(buf);
 559                         details += _("\nThe current document was closed.");
 560                         Alert::error(e.title_, details);
 561                         return false;
 562                 }
 563                 case WarningException:
 564                         Alert::warning(e.title_, e.details_);
 565                         return false;
 566                 };
 567         }
 568         catch (exception const & e) {
 569                 docstring s = _("LyX has caught an exception, it will now "
 570                         "attempt to save all unsaved documents and exit."
 571                         "\n\nException: ");
 572                 s += from_ascii(e.what());
 573                 Alert::error(_("Software exception Detected"), s);
 574                 LyX::cref().exit(1);
 575         }
 576         catch (...) {
 577                 docstring s = _("LyX has caught some really weird exception, it will "
 578                         "now attempt to save all unsaved documents and exit.");
 579                 Alert::error(_("Software exception Detected"), s);
 580                 LyX::cref().exit(1);
 581         }
 582
 583         return false;
 584 }
 585
 586
 587 bool GuiApplication::getRgbColor(ColorCode col, RGBColor & rgbcol)
 588 {
 589         QColor const & qcol = color_cache_.get(col);
 590         if (!qcol.isValid()) {
 591                 rgbcol.r = 0;
 592                 rgbcol.g = 0;
 593                 rgbcol.b = 0;
 594                 return false;
 595         }
 596         rgbcol.r = qcol.red();
 597         rgbcol.g = qcol.green();
 598         rgbcol.b = qcol.blue();
 599         return true;
 600 }
 601
 602
 603 string const GuiApplication::hexName(ColorCode col)
 604 {
 605         return ltrim(fromqstr(color_cache_.get(col).name()), "#");
 606 }
 607
 608
 609 void GuiApplication::updateColor(ColorCode)
 610 {
 611         // FIXME: Bleh, can't we just clear them all at once ?
 612         color_cache_.clear();
 613 }
 614
 615
 616 void GuiApplication::registerSocketCallback(int fd, SocketCallback func)
 617 {
 618         SocketNotifier * sn = new SocketNotifier(this, fd, func);
 619         socket_notifiers_[fd] = sn;
 620         connect(sn, SIGNAL(activated(int)), this, SLOT(socketDataReceived(int)));
 621 }
 622
 623
 624 void GuiApplication::socketDataReceived(int fd)
 625 {
 626         socket_notifiers_[fd]->func_();
 627 }
 628
 629
 630 void GuiApplication::unregisterSocketCallback(int fd)
 631 {
 632         socket_notifiers_.erase(fd);
 633 }
 634
 635
 636 void GuiApplication::commitData(QSessionManager & sm)
 637 {
 638         /// The implementation is required to avoid an application exit
 639         /// when session state save is triggered by session manager.
 640         /// The default implementation sends a close event to all
 641         /// visible top level widgets when session managment allows
 642         /// interaction.
 643         /// We are changing that to close all wiew one by one.
 644         /// FIXME: verify if the default implementation is enough now.
 645         if (sm.allowsInteraction() && !closeAllViews())
 646                 sm.cancel();
 647 }
 648
 649
 650 void GuiApplication::addMenuTranslator()
 651 {
 652         installTranslator(new MenuTranslator(this));
 653 }
 654
 655
 656 bool GuiApplication::unregisterView(int id)
 657 {
 658         updateIds(views_, view_ids_);
 659         BOOST_ASSERT(views_.find(id) != views_.end());
 660         BOOST_ASSERT(views_[id]);
 661
 662         map<int, GuiView *>::iterator it;
 663         for (it = views_.begin(); it != views_.end(); ++it) {
 664                 if (it->first == id) {
 665                         views_.erase(id);
 666                         break;
 667                 }
 668         }
 669         updateIds(views_, view_ids_);
 670         return true;
 671 }
 672
 673
 674 bool GuiApplication::closeAllViews()
 675 {
 676         updateIds(views_, view_ids_);
 677         if (views_.empty())
 678                 return true;
 679
 680         map<int, GuiView*> const cmap = views_;
 681         map<int, GuiView*>::const_iterator it;
 682         for (it = cmap.begin(); it != cmap.end(); ++it) {
 683                 if (!it->second->close())
 684                         return false;
 685         }
 686
 687         views_.clear();
 688         view_ids_.clear();
 689         return true;
 690 }
 691
 692
 693 GuiView & GuiApplication::view(int id) const
 694 {
 695         BOOST_ASSERT(views_.find(id) != views_.end());
 696         return *views_.find(id)->second;
 697 }
 698
 699
 700 void GuiApplication::hideDialogs(string const & name, Inset * inset) const
 701 {
 702         vector<int>::const_iterator it = view_ids_.begin();
 703         vector<int>::const_iterator const end = view_ids_.end();
 704         for (; it != end; ++it)
 705                 view(*it).hideDialog(name, inset);
 706 }
 707
 708
 709 Buffer const * GuiApplication::updateInset(Inset const * inset) const
 710 {
 711         Buffer const * buffer_ = 0;
 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                 Buffer const * ptr = view(*it).updateInset(inset);
 716                 if (ptr)
 717                         buffer_ = ptr;
 718         }
 719         return buffer_;
 720 }
 721
 722
 723 void GuiApplication::readMenus(Lexer & lex)
 724 {
 725         menus().read(lex);
 726 }
 727
 728
 729 bool GuiApplication::searchMenu(FuncRequest const & func,
 730         vector<docstring> & names) const
 731 {
 732         return menus().searchMenu(func, names);
 733 }
 734
 735
 736 void GuiApplication::initGlobalMenu()
 737 {
 738         if (global_menubar_)
 739                 menus().fillMenuBar(global_menubar_, 0);
 740 }
 741
 742
 743 void GuiApplication::onLastWindowClosed()
 744 {
 745         if (global_menubar_)
 746                 global_menubar_->grabKeyboard();
 747 }
 748
 749 ////////////////////////////////////////////////////////////////////////
 750 // X11 specific stuff goes here...
 751 #ifdef Q_WS_X11
 752 bool GuiApplication::x11EventFilter(XEvent * xev)
 753 {
 754         if (!current_view_)
 755                 return false;
 756
 757         switch (xev->type) {
 758         case SelectionRequest: {
 759                 if (xev->xselectionrequest.selection != XA_PRIMARY)
 760                         break;
 761                 LYXERR(Debug::GUI, "X requested selection.");
 762                 BufferView * bv = current_view_->view();
 763                 if (bv) {
 764                         docstring const sel = bv->requestSelection();
 765                         if (!sel.empty())
 766                                 selection_.put(sel);
 767                 }
 768                 break;
 769         }
 770         case SelectionClear: {
 771                 if (xev->xselectionclear.selection != XA_PRIMARY)
 772                         break;
 773                 LYXERR(Debug::GUI, "Lost selection.");
 774                 BufferView * bv = current_view_->view();
 775                 if (bv)
 776                         bv->clearSelection();
 777                 break;
 778         }
 779         }
 780         return false;
 781 }
 782 #endif
 783
 784 } // namespace frontend
 785
 786
 787 ////////////////////////////////////////////////////////////////////
 788 //
 789 // Font stuff
 790 //
 791 ////////////////////////////////////////////////////////////////////
 792
 793 frontend::FontLoader & theFontLoader()
 794 {
 795         BOOST_ASSERT(frontend::guiApp);
 796         return frontend::guiApp->fontLoader();
 797 }
 798
 799
 800 frontend::FontMetrics const & theFontMetrics(Font const & f)
 801 {
 802         return theFontMetrics(f.fontInfo());
 803 }
 804
 805
 806 frontend::FontMetrics const & theFontMetrics(FontInfo const & f)
 807 {
 808         BOOST_ASSERT(frontend::guiApp);
 809         return frontend::guiApp->fontLoader().metrics(f);
 810 }
 811
 812
 813 frontend::Clipboard & theClipboard()
 814 {
 815         BOOST_ASSERT(frontend::guiApp);
 816         return frontend::guiApp->clipboard();
 817 }
 818
 819
 820 frontend::Selection & theSelection()
 821 {
 822         BOOST_ASSERT(frontend::guiApp);
 823         return frontend::guiApp->selection();
 824 }
 825
 826 } // namespace lyx
 827
 828 #include "GuiApplication_moc.cpp"