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