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 "ColorCache.h"
  18 #include "GuiClipboard.h"
  19 #include "GuiImage.h"
  20 #include "GuiKeySymbol.h"
  21 #include "GuiSelection.h"
  22 #include "GuiView.h"
  23 #include "Menus.h"
  24 #include "qt_helpers.h"
  25 #include "Toolbars.h"
  26
  27 #include "frontends/alert.h"
  28 #include "frontends/Application.h"
  29 #include "frontends/FontLoader.h"
  30 #include "frontends/FontMetrics.h"
  31
  32 #include "Buffer.h"
  33 #include "BufferList.h"
  34 #include "BufferView.h"
  35 #include "Color.h"
  36 #include "Font.h"
  37 #include "FuncRequest.h"
  38 #include "FuncStatus.h"
  39 #include "Language.h"
  40 #include "Lexer.h"
  41 #include "LyX.h"
  42 #include "LyXAction.h"
  43 #include "LyXFunc.h"
  44 #include "LyXRC.h"
  45 #include "Session.h"
  46 #include "version.h"
  47
  48 #include "support/lassert.h"
  49 #include "support/debug.h"
  50 #include "support/ExceptionMessage.h"
  51 #include "support/FileName.h"
  52 #include "support/foreach.h"
  53 #include "support/ForkedCalls.h"
  54 #include "support/gettext.h"
  55 #include "support/lstrings.h"
  56 #include "support/lyxalgo.h" // sorted
  57 #include "support/os.h"
  58 #include "support/Package.h"
  59
  60 #ifdef Q_WS_MACX
  61 #include "support/linkback/LinkBackProxy.h"
  62 #endif
  63
  64 #include <QByteArray>
  65 #include <QClipboard>
  66 #include <QDir>
  67 #include <QEventLoop>
  68 #include <QFileOpenEvent>
  69 #include <QHash>
  70 #include <QIcon>
  71 #include <QImageReader>
  72 #include <QLocale>
  73 #include <QLibraryInfo>
  74 #include <QList>
  75 #include <QMacPasteboardMime>
  76 #include <QMenuBar>
  77 #include <QMimeData>
  78 #include <QObject>
  79 #include <QPixmap>
  80 #include <QPixmapCache>
  81 #include <QRegExp>
  82 #include <QSessionManager>
  83 #include <QSocketNotifier>
  84 #include <QSortFilterProxyModel>
  85 #include <QStandardItemModel>
  86 #include <QTextCodec>
  87 #include <QTimer>
  88 #include <QTranslator>
  89 #include <QWidget>
  90
  91 #ifdef Q_WS_X11
  92 #include <X11/Xatom.h>
  93 #include <X11/Xlib.h>
  94 #undef CursorShape
  95 #undef None
  96 #endif
  97
  98 #ifdef Q_WS_WIN
  99 #include <QWindowsMime>
 100 #if defined(Q_CYGWIN_WIN) || defined(Q_CC_MINGW)
 101 #include <wtypes.h>
 102 #endif
 103 #include <objidl.h>
 104 #endif // Q_WS_WIN
 105
 106 #include <boost/bind.hpp>
 107
 108 #include <exception>
 109 #include <vector>
 110
 111 using namespace std;
 112 using namespace lyx::support;
 113
 114
 115 static void initializeResources()
 116 {
 117         static bool initialized = false;
 118         if (!initialized) {
 119                 Q_INIT_RESOURCE(Resources);
 120                 initialized = true;
 121         }
 122 }
 123
 124
 125 namespace lyx {
 126
 127 frontend::Application * createApplication(int & argc, char * argv[])
 128 {
 129         return new frontend::GuiApplication(argc, argv);
 130 }
 131
 132 namespace frontend {
 133
 134
 135 /// Return the list of loadable formats.
 136 vector<string> loadableImageFormats()
 137 {
 138         vector<string> fmts;
 139
 140         QList<QByteArray> qt_formats = QImageReader::supportedImageFormats();
 141
 142         LYXERR(Debug::GRAPHICS,
 143                 "\nThe image loader can load the following directly:\n");
 144
 145         if (qt_formats.empty())
 146                 LYXERR(Debug::GRAPHICS, "\nQt4 Problem: No Format available!");
 147
 148         for (QList<QByteArray>::const_iterator it = qt_formats.begin(); it != qt_formats.end(); ++it) {
 149
 150                 LYXERR(Debug::GRAPHICS, (const char *) *it << ", ");
 151
 152                 string ext = ascii_lowercase((const char *) *it);
 153                 // special case
 154                 if (ext == "jpeg")
 155                         ext = "jpg";
 156                 fmts.push_back(ext);
 157         }
 158
 159         return fmts;
 160 }
 161
 162 ////////////////////////////////////////////////////////////////////////
 163 // Icon loading support code.
 164 ////////////////////////////////////////////////////////////////////////
 165
 166 namespace {
 167
 168 struct PngMap {
 169         QString key;
 170         QString value;
 171 };
 172
 173
 174 bool operator<(PngMap const & lhs, PngMap const & rhs)
 175 {
 176         return lhs.key < rhs.key;
 177 }
 178
 179
 180 class CompareKey {
 181 public:
 182         CompareKey(QString const & name) : name_(name) {}
 183         bool operator()(PngMap const & other) const { return other.key == name_; }
 184 private:
 185         QString const name_;
 186 };
 187
 188
 189 // this must be sorted alphabetically
 190 // Upper case comes before lower case
 191 PngMap sorted_png_map[] = {
 192         { "Bumpeq", "bumpeq2" },
 193         { "Cap", "cap2" },
 194         { "Cup", "cup2" },
 195         { "Delta", "delta2" },
 196         { "Downarrow", "downarrow2" },
 197         { "Gamma", "gamma2" },
 198         { "Lambda", "lambda2" },
 199         { "Leftarrow", "leftarrow2" },
 200         { "Leftrightarrow", "leftrightarrow2" },
 201         { "Longleftarrow", "longleftarrow2" },
 202         { "Longleftrightarrow", "longleftrightarrow2" },
 203         { "Longrightarrow", "longrightarrow2" },
 204         { "Omega", "omega2" },
 205         { "Phi", "phi2" },
 206         { "Pi", "pi2" },
 207         { "Psi", "psi2" },
 208         { "Rightarrow", "rightarrow2" },
 209         { "Sigma", "sigma2" },
 210         { "Subset", "subset2" },
 211         { "Supset", "supset2" },
 212         { "Theta", "theta2" },
 213         { "Uparrow", "uparrow2" },
 214         { "Updownarrow", "updownarrow2" },
 215         { "Upsilon", "upsilon2" },
 216         { "Vdash", "vdash3" },
 217         { "Vert", "vert2" },
 218         { "Xi", "xi2" },
 219         { "nLeftarrow", "nleftarrow2" },
 220         { "nLeftrightarrow", "nleftrightarrow2" },
 221         { "nRightarrow", "nrightarrow2" },
 222         { "nVDash", "nvdash3" },
 223         { "nvDash", "nvdash2" },
 224         { "textrm \\AA", "textrm_AA"},
 225         { "textrm \\O", "textrm_O"},
 226         { "vDash", "vdash2" }
 227 };
 228
 229 size_t const nr_sorted_png_map = sizeof(sorted_png_map) / sizeof(PngMap);
 230
 231
 232 QString findPng(QString const & name)
 233 {
 234         PngMap const * const begin = sorted_png_map;
 235         PngMap const * const end = begin + nr_sorted_png_map;
 236         LASSERT(sorted(begin, end), /**/);
 237
 238         PngMap const * const it = find_if(begin, end, CompareKey(name));
 239
 240         QString png_name;
 241         if (it != end) {
 242                 png_name = it->value;
 243         } else {
 244                 png_name = name;
 245                 png_name.replace('_', "underscore");
 246                 png_name.replace(' ', '_');
 247
 248                 // This way we can have "math-delim { }" on the toolbar.
 249                 png_name.replace('(', "lparen");
 250                 png_name.replace(')', "rparen");
 251                 png_name.replace('[', "lbracket");
 252                 png_name.replace(']', "rbracket");
 253                 png_name.replace('{', "lbrace");
 254                 png_name.replace('}', "rbrace");
 255                 png_name.replace('|', "bars");
 256                 png_name.replace(',', "thinspace");
 257                 png_name.replace(':', "mediumspace");
 258                 png_name.replace(';', "thickspace");
 259                 png_name.replace('!', "negthinspace");
 260         }
 261
 262         LYXERR(Debug::GUI, "findPng(" << name << ")\n"
 263                 << "Looking for math PNG called \"" << png_name << '"');
 264         return png_name;
 265 }
 266
 267 } // namespace anon
 268
 269
 270 QString iconName(FuncRequest const & f, bool unknown)
 271 {
 272         initializeResources();
 273         QString name1;
 274         QString name2;
 275         QString path;
 276         switch (f.action) {
 277         case LFUN_MATH_INSERT:
 278                 if (!f.argument().empty()) {
 279                         path = "math/";
 280                         name1 = findPng(toqstr(f.argument()).mid(1));
 281                 }
 282                 break;
 283         case LFUN_MATH_DELIM:
 284         case LFUN_MATH_BIGDELIM:
 285                 path = "math/";
 286                 name1 = findPng(toqstr(f.argument()));
 287                 break;
 288         case LFUN_CALL:
 289                 path = "commands/";
 290                 name1 = toqstr(f.argument());
 291                 break;
 292         default:
 293                 name2 = toqstr(lyxaction.getActionName(f.action));
 294                 name1 = name2;
 295
 296                 if (!f.argument().empty()) {
 297                         name1 = name2 + ' ' + toqstr(f.argument());
 298                         name1.replace(' ', '_');
 299                 }
 300         }
 301
 302         FileName fname = libFileSearch("images/" + path, name1, "png");
 303         if (fname.exists())
 304                 return toqstr(fname.absFilename());
 305
 306         fname = libFileSearch("images/" + path, name2, "png");
 307         if (fname.exists())
 308                 return toqstr(fname.absFilename());
 309
 310         path = ":/images/" + path;
 311         QDir res(path);
 312         if (!res.exists()) {
 313                 LYXERR0("Directory " << path << " not found in resource!");
 314                 return QString();
 315         }
 316         name1 += ".png";
 317         if (res.exists(name1))
 318                 return path + name1;
 319
 320         name2 += ".png";
 321         if (res.exists(name2))
 322                 return path + name2;
 323
 324         LYXERR(Debug::GUI, "Cannot find icon for command \""
 325                            << lyxaction.getActionName(f.action)
 326                            << '(' << to_utf8(f.argument()) << ")\"");
 327
 328         if (unknown)
 329                 return QString(":/images/unknown.png");
 330
 331         return QString();
 332 }
 333
 334
 335 QIcon getIcon(FuncRequest const & f, bool unknown)
 336 {
 337         QString icon = iconName(f, unknown);
 338         if (icon.isEmpty())
 339                 return QIcon();
 340
 341         LYXERR(Debug::GUI, "Found icon: " << icon);
 342         QPixmap pm;
 343         if (!pm.load(icon)) {
 344                 LYXERR0("Cannot load icon " << icon << " please verify resource system!");
 345                 return QIcon();
 346         }
 347
 348         return QIcon(pm);
 349 }
 350
 351
 352 ////////////////////////////////////////////////////////////////////////
 353 // LyX server support code.
 354 ////////////////////////////////////////////////////////////////////////
 355 class SocketNotifier : public QSocketNotifier
 356 {
 357 public:
 358         /// connect a connection notification from the LyXServerSocket
 359         SocketNotifier(QObject * parent, int fd, Application::SocketCallback func)
 360                 : QSocketNotifier(fd, QSocketNotifier::Read, parent), func_(func)
 361         {}
 362
 363 public:
 364         /// The callback function
 365         Application::SocketCallback func_;
 366 };
 367
 368
 369 ////////////////////////////////////////////////////////////////////////
 370 // Mac specific stuff goes here...
 371 ////////////////////////////////////////////////////////////////////////
 372
 373 class MenuTranslator : public QTranslator
 374 {
 375 public:
 376         MenuTranslator(QObject * parent)
 377                 : QTranslator(parent)
 378         {}
 379
 380         QString translate(const char * /*context*/,
 381           const char * sourceText,
 382           const char * /*comment*/ = 0)
 383         {
 384                 string const s = sourceText;
 385                 if (s == N_("About %1") || s == N_("Preferences")
 386                                 || s == N_("Reconfigure") || s == N_("Quit %1"))
 387                         return qt_(s);
 388                 else
 389                         return QString();
 390         }
 391 };
 392
 393 class GlobalMenuBar : public QMenuBar
 394 {
 395 public:
 396         ///
 397         GlobalMenuBar() : QMenuBar(0) {}
 398
 399         ///
 400         bool event(QEvent * e)
 401         {
 402                 if (e->type() == QEvent::ShortcutOverride) {
 403                         //          && activeWindow() == 0) {
 404                         QKeyEvent * ke = static_cast<QKeyEvent*>(e);
 405                         KeySymbol sym;
 406                         setKeySymbol(&sym, ke);
 407                         theLyXFunc().processKeySym(sym, q_key_state(ke->modifiers()));
 408                         e->accept();
 409                         return true;
 410                 }
 411                 return false;
 412         }
 413 };
 414
 415 #ifdef Q_WS_MACX
 416 // QMacPasteboardMimeGraphics can only be compiled on Mac.
 417
 418 class QMacPasteboardMimeGraphics : public QMacPasteboardMime
 419 {
 420 public:
 421         QMacPasteboardMimeGraphics()
 422                 : QMacPasteboardMime(MIME_QT_CONVERTOR|MIME_ALL)
 423         {}
 424
 425         QString convertorName() { return "Graphics"; }
 426
 427         QString flavorFor(QString const & mime)
 428         {
 429                 LYXERR(Debug::ACTION, "flavorFor " << mime);
 430                 if (mime == pdfMimeType())
 431                         return QLatin1String("com.adobe.pdf");
 432                 return QString();
 433         }
 434
 435         QString mimeFor(QString flav)
 436         {
 437                 LYXERR(Debug::ACTION, "mimeFor " << flav);
 438                 if (flav == QLatin1String("com.adobe.pdf"))
 439                         return pdfMimeType();
 440                 return QString();
 441         }
 442
 443         bool canConvert(QString const & mime, QString flav)
 444         {
 445                 return mimeFor(flav) == mime;
 446         }
 447
 448         QVariant convertToMime(QString const & /*mime*/, QList<QByteArray> data,
 449                 QString /*flav*/)
 450         {
 451                 if(data.count() > 1)
 452                         qWarning("QMacPasteboardMimeGraphics: Cannot handle multiple member data");
 453                 return data.first();
 454         }
 455
 456         QList<QByteArray> convertFromMime(QString const & /*mime*/,
 457                 QVariant data, QString /*flav*/)
 458         {
 459                 QList<QByteArray> ret;
 460                 ret.append(data.toByteArray());
 461                 return ret;
 462         }
 463 };
 464 #endif
 465
 466 ///////////////////////////////////////////////////////////////
 467 // You can find more platform specific stuff
 468 // at the end of this file...
 469 ///////////////////////////////////////////////////////////////
 470
 471 ////////////////////////////////////////////////////////////////////////
 472 // Windows specific stuff goes here...
 473
 474 #ifdef Q_WS_WIN
 475 // QWindowsMimeMetafile can only be compiled on Windows.
 476
 477 static FORMATETC cfFromMime(QString const & mimetype)
 478 {
 479         FORMATETC formatetc;
 480         if (mimetype == emfMimeType()) {
 481                 formatetc.cfFormat = CF_ENHMETAFILE;
 482                 formatetc.tymed = TYMED_ENHMF;
 483         } else if (mimetype == wmfMimeType()) {
 484                 formatetc.cfFormat = CF_METAFILEPICT;
 485                 formatetc.tymed = TYMED_MFPICT;
 486         }
 487         formatetc.ptd = 0;
 488         formatetc.dwAspect = DVASPECT_CONTENT;
 489         formatetc.lindex = -1;
 490         return formatetc;
 491 }
 492
 493
 494 class QWindowsMimeMetafile : public QWindowsMime {
 495 public:
 496         QWindowsMimeMetafile() {}
 497
 498         bool canConvertFromMime(FORMATETC const & formatetc,
 499                 QMimeData const * mimedata) const
 500         {
 501                 return false;
 502         }
 503
 504         bool canConvertToMime(QString const & mimetype,
 505                 IDataObject * pDataObj) const
 506         {
 507                 if (mimetype != emfMimeType() && mimetype != wmfMimeType())
 508                         return false;
 509                 FORMATETC formatetc = cfFromMime(mimetype);
 510                 return pDataObj->QueryGetData(&formatetc) == S_OK;
 511         }
 512
 513         bool convertFromMime(FORMATETC const & formatetc,
 514                 const QMimeData * mimedata, STGMEDIUM * pmedium) const
 515         {
 516                 return false;
 517         }
 518
 519         QVariant convertToMime(QString const & mimetype, IDataObject * pDataObj,
 520                 QVariant::Type preferredType) const
 521         {
 522                 QByteArray data;
 523                 if (!canConvertToMime(mimetype, pDataObj))
 524                         return data;
 525
 526                 FORMATETC formatetc = cfFromMime(mimetype);
 527                 STGMEDIUM s;
 528                 if (pDataObj->GetData(&formatetc, &s) != S_OK)
 529                         return data;
 530
 531                 int dataSize;
 532                 if (s.tymed == TYMED_ENHMF) {
 533                         dataSize = GetEnhMetaFileBits(s.hEnhMetaFile, 0, 0);
 534                         data.resize(dataSize);
 535                         dataSize = GetEnhMetaFileBits(s.hEnhMetaFile, dataSize,
 536                                 (LPBYTE)data.data());
 537                 } else if (s.tymed == TYMED_MFPICT) {
 538                         dataSize = GetMetaFileBitsEx((HMETAFILE)s.hMetaFilePict, 0, 0);
 539                         data.resize(dataSize);
 540                         dataSize = GetMetaFileBitsEx((HMETAFILE)s.hMetaFilePict, dataSize,
 541                                 (LPBYTE)data.data());
 542                 }
 543                 data.detach();
 544                 ReleaseStgMedium(&s);
 545
 546                 return data;
 547         }
 548
 549
 550         QVector<FORMATETC> formatsForMime(QString const & mimeType,
 551                 QMimeData const * mimeData) const
 552         {
 553                 QVector<FORMATETC> formats;
 554                 formats += cfFromMime(mimeType);
 555                 return formats;
 556         }
 557
 558         QString mimeForFormat(FORMATETC const & formatetc) const
 559         {
 560                 switch (formatetc.cfFormat) {
 561                 case CF_ENHMETAFILE:
 562                         return emfMimeType();
 563                 case CF_METAFILEPICT:
 564                         return wmfMimeType();
 565                 }
 566                 return QString();
 567         }
 568 };
 569
 570 #endif // Q_WS_WIN
 571
 572 ////////////////////////////////////////////////////////////////////////
 573 // GuiApplication::Private definition and implementation.
 574 ////////////////////////////////////////////////////////////////////////
 575
 576 struct GuiApplication::Private
 577 {
 578         Private()
 579                 : language_model_(0), global_menubar_(0)
 580         {
 581 #ifdef Q_WS_MACX
 582                 // Create the global default menubar which is shown for the dialogs
 583                 // and if no GuiView is visible.
 584                 global_menubar_ = new GlobalMenuBar();
 585 #endif
 586         }
 587
 588         ///
 589         QSortFilterProxyModel * language_model_;
 590         ///
 591         GuiClipboard clipboard_;
 592         ///
 593         GuiSelection selection_;
 594         ///
 595         FontLoader font_loader_;
 596         ///
 597         ColorCache color_cache_;
 598         ///
 599         QTranslator qt_trans_;
 600         ///
 601         QHash<int, SocketNotifier *> socket_notifiers_;
 602         ///
 603         Menus menus_;
 604         ///
 605         /// The global instance
 606         Toolbars toolbars_;
 607
 608         /// this timer is used for any regular events one wants to
 609         /// perform. at present it is used to check if forked processes
 610         /// are done.
 611         QTimer general_timer_;
 612
 613         /// Multiple views container.
 614         /**
 615         * Warning: This must not be a smart pointer as the destruction of the
 616         * object is handled by Qt when the view is closed
 617         * \sa Qt::WA_DeleteOnClose attribute.
 618         */
 619         QHash<int, GuiView *> views_;
 620
 621         /// Only used on mac.
 622         GlobalMenuBar * global_menubar_;
 623
 624 #ifdef Q_WS_MACX
 625         /// Linkback mime handler for MacOSX.
 626         QMacPasteboardMimeGraphics mac_pasteboard_mime_;
 627 #endif
 628
 629 #ifdef Q_WS_WIN
 630         /// WMF Mime handler for Windows clipboard.
 631         // FIXME for Windows Vista and Qt4 (see http://bugzilla.lyx.org/show_bug.cgi?id=4846)
 632         // But this makes LyX crash on exit when LyX is compiled in release mode and if there
 633         // is something in the clipboard.
 634         QWindowsMimeMetafile wmf_mime_;
 635 #endif
 636 };
 637
 638
 639 GuiApplication * guiApp;
 640
 641 GuiApplication::~GuiApplication()
 642 {
 643 #ifdef Q_WS_MACX
 644         closeAllLinkBackLinks();
 645 #endif
 646         delete d;
 647 }
 648
 649
 650 GuiApplication::GuiApplication(int & argc, char ** argv)
 651         : QApplication(argc, argv),     current_view_(0), d(new GuiApplication::Private)
 652 {
 653         QString app_name = "LyX";
 654         QCoreApplication::setOrganizationName(app_name);
 655         QCoreApplication::setOrganizationDomain("lyx.org");
 656         QCoreApplication::setApplicationName(app_name + "-" + lyx_version);
 657
 658         // FIXME: quitOnLastWindowClosed is true by default. We should have a
 659         // lyxrc setting for this in order to let the application stay resident.
 660         // But then we need some kind of dock icon, at least on Windows.
 661         /*
 662         if (lyxrc.quit_on_last_window_closed)
 663                 setQuitOnLastWindowClosed(false);
 664         */
 665 #ifdef Q_WS_MACX
 666         // FIXME: Do we need a lyxrc setting for this on Mac? This behaviour
 667         // seems to be the default case for applications like LyX.
 668         setQuitOnLastWindowClosed(false);
 669 #endif
 670
 671 #ifdef Q_WS_X11
 672         // doubleClickInterval() is 400 ms on X11 which is just too long.
 673         // On Windows and Mac OS X, the operating system's value is used.
 674         // On Microsoft Windows, calling this function sets the double
 675         // click interval for all applications. So we don't!
 676         QApplication::setDoubleClickInterval(300);
 677 #endif
 678
 679         // install translation file for Qt built-in dialogs
 680         QString language_name = QString("qt_") + QLocale::system().name();
 681
 682         // language_name can be short (e.g. qt_zh) or long (e.g. qt_zh_CN).
 683         // Short-named translator can be loaded from a long name, but not the
 684         // opposite. Therefore, long name should be used without truncation.
 685         // c.f. http://doc.trolltech.com/4.1/qtranslator.html#load
 686         if (d->qt_trans_.load(language_name,
 687                 QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
 688         {
 689                 installTranslator(&d->qt_trans_);
 690                 // even if the language calls for RtL, don't do that
 691                 setLayoutDirection(Qt::LeftToRight);
 692                 LYXERR(Debug::GUI, "Successfully installed Qt translations for locale "
 693                         << language_name);
 694         } else
 695                 LYXERR(Debug::GUI, "Could not find  Qt translations for locale "
 696                         << language_name);
 697
 698 #ifdef Q_WS_MACX
 699         // This allows to translate the strings that appear in the LyX menu.
 700         /// A translator suitable for the entries in the LyX menu.
 701         /// Only needed with Qt/Mac.
 702         installTranslator(new MenuTranslator(this));
 703 #endif
 704         connect(this, SIGNAL(lastWindowClosed()), this, SLOT(onLastWindowClosed()));
 705
 706         using namespace lyx::graphics;
 707
 708         Image::newImage = boost::bind(&GuiImage::newImage);
 709
 710         // needs to be done before reading lyxrc
 711         QWidget w;
 712         lyxrc.dpi = (w.logicalDpiX() + w.logicalDpiY()) / 2;
 713
 714         guiApp = this;
 715
 716         // Set the cache to 5120 kilobytes which corresponds to screen size of
 717         // 1280 by 1024 pixels with a color depth of 32 bits.
 718         QPixmapCache::setCacheLimit(5120);
 719
 720         // Initialize RC Fonts
 721         if (lyxrc.roman_font_name.empty())
 722                 lyxrc.roman_font_name = fromqstr(romanFontName());
 723
 724         if (lyxrc.sans_font_name.empty())
 725                 lyxrc.sans_font_name = fromqstr(sansFontName());
 726
 727         if (lyxrc.typewriter_font_name.empty())
 728                 lyxrc.typewriter_font_name = fromqstr(typewriterFontName());
 729
 730         d->general_timer_.setInterval(500);
 731         connect(&d->general_timer_, SIGNAL(timeout()),
 732                 this, SLOT(handleRegularEvents()));
 733         d->general_timer_.start();
 734 }
 735
 736
 737 docstring GuiApplication::iconName(FuncRequest const & f, bool unknown)
 738 {
 739         return qstring_to_ucs4(lyx::frontend::iconName(f, unknown));
 740 }
 741
 742
 743
 744 bool GuiApplication::getStatus(FuncRequest const & cmd, FuncStatus & flag) const
 745 {
 746         bool enable = true;
 747
 748         switch(cmd.action) {
 749
 750         case LFUN_WINDOW_CLOSE:
 751                 enable = d->views_.size() > 0;
 752                 break;
 753
 754         case LFUN_BUFFER_NEW:
 755         case LFUN_BUFFER_NEW_TEMPLATE:
 756         case LFUN_FILE_OPEN:
 757         case LFUN_SCREEN_FONT_UPDATE:
 758         case LFUN_SET_COLOR:
 759         case LFUN_WINDOW_NEW:
 760         case LFUN_LYX_QUIT:
 761                 enable = true;
 762                 break;
 763
 764         default:
 765                 return false;
 766         }
 767
 768         if (!enable)
 769                 flag.setEnabled(false);
 770
 771         return true;
 772 }
 773
 774
 775 bool GuiApplication::dispatch(FuncRequest const & cmd)
 776 {
 777         switch (cmd.action) {
 778
 779         case LFUN_WINDOW_NEW:
 780                 createView(toqstr(cmd.argument()));
 781                 break;
 782
 783         case LFUN_WINDOW_CLOSE:
 784                 // update bookmark pit of the current buffer before window close
 785                 for (size_t i = 0; i < LyX::ref().session().bookmarks().size(); ++i)
 786                         theLyXFunc().gotoBookmark(i+1, false, false);
 787                 current_view_->close();
 788                 break;
 789
 790         case LFUN_LYX_QUIT:
 791                 // quitting is triggered by the gui code
 792                 // (leaving the event loop).
 793                 if (current_view_)
 794                         current_view_->message(from_utf8(N_("Exiting.")));
 795                 if (closeAllViews())
 796                         quit();
 797                 break;
 798
 799         case LFUN_SCREEN_FONT_UPDATE: {
 800                 // handle the screen font changes.
 801                 d->font_loader_.update();
 802                 // Backup current_view_
 803                 GuiView * view = current_view_;
 804                 // Set current_view_ to zero to forbid GuiWorkArea::redraw()
 805                 // to skip the refresh.
 806                 current_view_ = 0;
 807                 BufferList::iterator it = theBufferList().begin();
 808                 BufferList::iterator const end = theBufferList().end();
 809                 for (; it != end; ++it)
 810                         (*it)->changed();
 811                 // Restore current_view_
 812                 current_view_ = view;
 813                 break;
 814         }
 815
 816         case LFUN_BUFFER_NEW:
 817                 if (d->views_.empty()
 818                     || (!lyxrc.open_buffers_in_tabs && current_view_->buffer() != 0)) {
 819                         createView(QString(), false); // keep hidden
 820                         current_view_->newDocument(to_utf8(cmd.argument()), false);
 821                         current_view_->show();
 822                         setActiveWindow(current_view_);
 823                 } else {
 824                         current_view_->newDocument(to_utf8(cmd.argument()), false);
 825                 }
 826                 break;
 827
 828         case LFUN_BUFFER_NEW_TEMPLATE:
 829                 if (d->views_.empty()
 830                     || (!lyxrc.open_buffers_in_tabs && current_view_->buffer() != 0)) {
 831                         createView();
 832                         current_view_->newDocument(to_utf8(cmd.argument()), true);
 833                         if (!current_view_->buffer())
 834                                 current_view_->close();
 835                 } else {
 836                         current_view_->newDocument(to_utf8(cmd.argument()), true);
 837                 }
 838                 break;
 839
 840         case LFUN_FILE_OPEN:
 841                 if (d->views_.empty()
 842                     || (!lyxrc.open_buffers_in_tabs && current_view_->buffer() != 0)) {
 843                         createView();
 844                         current_view_->openDocument(to_utf8(cmd.argument()));
 845                         if (!current_view_->buffer())
 846                                 current_view_->close();
 847                 } else
 848                         current_view_->openDocument(to_utf8(cmd.argument()));
 849                 break;
 850
 851         case LFUN_SET_COLOR: {
 852                 string lyx_name;
 853                 string const x11_name = split(to_utf8(cmd.argument()), lyx_name, ' ');
 854                 if (lyx_name.empty() || x11_name.empty()) {
 855                         current_view_->message(
 856                                 _("Syntax: set-color <lyx_name> <x11_name>"));
 857                         break;
 858                 }
 859
 860                 string const graphicsbg = lcolor.getLyXName(Color_graphicsbg);
 861                 bool const graphicsbg_changed = lyx_name == graphicsbg
 862                         && x11_name != graphicsbg;
 863                 if (graphicsbg_changed) {
 864                         // FIXME: The graphics cache no longer has a changeDisplay method.
 865 #if 0
 866                         graphics::GCache::get().changeDisplay(true);
 867 #endif
 868                 }
 869
 870                 if (!lcolor.setColor(lyx_name, x11_name)) {
 871                         current_view_->message(
 872                                         bformat(_("Set-color \"%1$s\" failed "
 873                                                                "- color is undefined or "
 874                                                                "may not be redefined"),
 875                                                                    from_utf8(lyx_name)));
 876                         break;
 877                 }
 878                 // Make sure we don't keep old colors in cache.
 879                 d->color_cache_.clear();
 880                 break;
 881         }
 882
 883         default:
 884                 // Notify the caller that the action has not been dispatched.
 885                 return false;
 886         }
 887
 888         // The action has been dispatched.
 889         return true;
 890 }
 891
 892
 893 void GuiApplication::resetGui()
 894 {
 895         QHash<int, GuiView *>::iterator it;
 896         for (it = d->views_.begin(); it != d->views_.end(); ++it)
 897                 (*it)->resetDialogs();
 898
 899         dispatch(FuncRequest(LFUN_SCREEN_FONT_UPDATE));
 900 }
 901
 902
 903 void GuiApplication::createView(QString const & geometry_arg, bool autoShow)
 904 {
 905         // release the keyboard which might have been grabed by the global
 906         // menubar on Mac to catch shortcuts even without any GuiView.
 907         if (d->global_menubar_)
 908                 d->global_menubar_->releaseKeyboard();
 909
 910         // create new view
 911         int id = 0;
 912         while (d->views_.find(id) != d->views_.end())
 913                 id++;
 914         GuiView * view = new GuiView(id);
 915
 916         // copy the icon size from old view
 917         if (current_view_)
 918                 view->setIconSize(current_view_->iconSize());
 919
 920         // register view
 921         d->views_[id] = view;
 922
 923         if (autoShow) {
 924                 view->show();
 925                 setActiveWindow(view);
 926         }
 927
 928         if (!geometry_arg.isEmpty()) {
 929 #ifdef Q_WS_WIN
 930                 int x, y;
 931                 int w, h;
 932                 QRegExp re( "[=]*(?:([0-9]+)[xX]([0-9]+)){0,1}[ ]*(?:([+-][0-9]*)([+-][0-9]*)){0,1}" );
 933                 re.indexIn(geometry_arg);
 934                 w = re.cap(1).toInt();
 935                 h = re.cap(2).toInt();
 936                 x = re.cap(3).toInt();
 937                 y = re.cap(4).toInt();
 938                 view->setGeometry(x, y, w, h);
 939 #endif
 940         }
 941         view->setFocus();
 942         setCurrentView(view);
 943 }
 944
 945
 946 Clipboard & GuiApplication::clipboard()
 947 {
 948         return d->clipboard_;
 949 }
 950
 951
 952 Selection & GuiApplication::selection()
 953 {
 954         return d->selection_;
 955 }
 956
 957
 958 FontLoader & GuiApplication::fontLoader()
 959 {
 960         return d->font_loader_;
 961 }
 962
 963
 964 Toolbars const & GuiApplication::toolbars() const
 965 {
 966         return d->toolbars_;
 967 }
 968
 969
 970 Toolbars & GuiApplication::toolbars()
 971 {
 972         return d->toolbars_;
 973 }
 974
 975
 976 Menus const & GuiApplication::menus() const
 977 {
 978         return d->menus_;
 979 }
 980
 981
 982 Menus & GuiApplication::menus()
 983 {
 984         return d->menus_;
 985 }
 986
 987
 988 QList<int> GuiApplication::viewIds() const
 989 {
 990         return d->views_.keys();
 991 }
 992
 993
 994 ColorCache & GuiApplication::colorCache()
 995 {
 996         return d->color_cache_;
 997 }
 998
 999
1000 int GuiApplication::exec()
1001 {
1002         QTimer::singleShot(1, this, SLOT(execBatchCommands()));
1003         return QApplication::exec();
1004 }
1005
1006
1007 void GuiApplication::exit(int status)
1008 {
1009         QApplication::exit(status);
1010 }
1011
1012
1013 void GuiApplication::execBatchCommands()
1014 {
1015         // Read menus
1016         if (!readUIFile(toqstr(lyxrc.ui_file)))
1017                 // Gives some error box here.
1018                 return;
1019
1020         // init the global menubar on Mac. This must be done after the session
1021         // was recovered to know the "last files".
1022         if (d->global_menubar_)
1023                 d->menus_.fillMenuBar(d->global_menubar_, 0, true);
1024
1025         LyX::ref().execBatchCommands();
1026 }
1027
1028 QAbstractItemModel * GuiApplication::languageModel()
1029 {
1030         if (d->language_model_)
1031                 return d->language_model_;
1032
1033         QStandardItemModel * lang_model = new QStandardItemModel(this);
1034         lang_model->insertColumns(0, 1);
1035         int current_row;
1036         Languages::const_iterator it = languages.begin();
1037         Languages::const_iterator end = languages.end();
1038         for (; it != end; ++it) {
1039                 current_row = lang_model->rowCount();
1040                 lang_model->insertRows(current_row, 1);
1041                 QModelIndex item = lang_model->index(current_row, 0);
1042                 lang_model->setData(item, qt_(it->second.display()), Qt::DisplayRole);
1043                 lang_model->setData(item, toqstr(it->second.lang()), Qt::UserRole);
1044         }
1045         d->language_model_ = new QSortFilterProxyModel(this);
1046         d->language_model_->setSourceModel(lang_model);
1047 #if QT_VERSION >= 0x040300
1048         d->language_model_->setSortLocaleAware(true);
1049 #endif
1050         return d->language_model_;
1051 }
1052
1053
1054 void GuiApplication::restoreGuiSession()
1055 {
1056         if (!lyxrc.load_session)
1057                 return;
1058
1059         Session & session = LyX::ref().session();
1060         vector<FileName> const & lastopened = session.lastOpened().getfiles();
1061         // do not add to the lastfile list since these files are restored from
1062         // last session, and should be already there (regular files), or should
1063         // not be added at all (help files).
1064         for_each(lastopened.begin(), lastopened.end(),
1065                 bind(&GuiView::loadDocument, current_view_, _1, false));
1066
1067         // clear this list to save a few bytes of RAM
1068         session.lastOpened().clear();
1069 }
1070
1071
1072 QString const GuiApplication::romanFontName()
1073 {
1074         QFont font;
1075         font.setKerning(false);
1076         font.setStyleHint(QFont::Serif);
1077         font.setFamily("serif");
1078
1079         return QFontInfo(font).family();
1080 }
1081
1082
1083 QString const GuiApplication::sansFontName()
1084 {
1085         QFont font;
1086         font.setKerning(false);
1087         font.setStyleHint(QFont::SansSerif);
1088         font.setFamily("sans");
1089
1090         return QFontInfo(font).family();
1091 }
1092
1093
1094 QString const GuiApplication::typewriterFontName()
1095 {
1096         QFont font;
1097         font.setKerning(false);
1098         font.setStyleHint(QFont::TypeWriter);
1099         font.setFamily("monospace");
1100
1101         return QFontInfo(font).family();
1102 }
1103
1104
1105 void GuiApplication::handleRegularEvents()
1106 {
1107         ForkedCallsController::handleCompletedProcesses();
1108 }
1109
1110
1111 bool GuiApplication::event(QEvent * e)
1112 {
1113         switch(e->type()) {
1114         case QEvent::FileOpen: {
1115                 // Open a file; this happens only on Mac OS X for now
1116                 QFileOpenEvent * foe = static_cast<QFileOpenEvent *>(e);
1117                 lyx::dispatch(FuncRequest(LFUN_FILE_OPEN,
1118                         qstring_to_ucs4(foe->file())));
1119                 e->accept();
1120                 return true;
1121         }
1122         default:
1123                 return QApplication::event(e);
1124         }
1125 }
1126
1127
1128 bool GuiApplication::notify(QObject * receiver, QEvent * event)
1129 {
1130         try {
1131                 return QApplication::notify(receiver, event);
1132         }
1133         catch (ExceptionMessage const & e) {
1134                 switch(e.type_) {
1135                 case ErrorException:
1136                         LyX::cref().emergencyCleanup();
1137                         setQuitOnLastWindowClosed(false);
1138                         closeAllViews();
1139                         Alert::error(e.title_, e.details_);
1140 #ifndef NDEBUG
1141                         // Properly crash in debug mode in order to get a useful backtrace.
1142                         abort();
1143 #endif
1144                         // In release mode, try to exit gracefully.
1145                         this->exit(1);
1146
1147                 case BufferException: {
1148                         Buffer * buf = current_view_->buffer();
1149                         docstring details = e.details_ + '\n';
1150                         details += theBufferList().emergencyWrite(buf);
1151                         theBufferList().release(buf);
1152                         details += "\n" + _("The current document was closed.");
1153                         Alert::error(e.title_, details);
1154                         return false;
1155                 }
1156                 case WarningException:
1157                         Alert::warning(e.title_, e.details_);
1158                         return false;
1159                 }
1160         }
1161         catch (exception const & e) {
1162                 docstring s = _("LyX has caught an exception, it will now "
1163                         "attempt to save all unsaved documents and exit."
1164                         "\n\nException: ");
1165                 s += from_ascii(e.what());
1166                 Alert::error(_("Software exception Detected"), s);
1167                 LyX::cref().exit(1);
1168         }
1169         catch (...) {
1170                 docstring s = _("LyX has caught some really weird exception, it will "
1171                         "now attempt to save all unsaved documents and exit.");
1172                 Alert::error(_("Software exception Detected"), s);
1173                 LyX::cref().exit(1);
1174         }
1175
1176         return false;
1177 }
1178
1179
1180 bool GuiApplication::getRgbColor(ColorCode col, RGBColor & rgbcol)
1181 {
1182         QColor const & qcol = d->color_cache_.get(col);
1183         if (!qcol.isValid()) {
1184                 rgbcol.r = 0;
1185                 rgbcol.g = 0;
1186                 rgbcol.b = 0;
1187                 return false;
1188         }
1189         rgbcol.r = qcol.red();
1190         rgbcol.g = qcol.green();
1191         rgbcol.b = qcol.blue();
1192         return true;
1193 }
1194
1195
1196 string const GuiApplication::hexName(ColorCode col)
1197 {
1198         return ltrim(fromqstr(d->color_cache_.get(col).name()), "#");
1199 }
1200
1201
1202 void GuiApplication::registerSocketCallback(int fd, SocketCallback func)
1203 {
1204         SocketNotifier * sn = new SocketNotifier(this, fd, func);
1205         d->socket_notifiers_[fd] = sn;
1206         connect(sn, SIGNAL(activated(int)), this, SLOT(socketDataReceived(int)));
1207 }
1208
1209
1210 void GuiApplication::socketDataReceived(int fd)
1211 {
1212         d->socket_notifiers_[fd]->func_();
1213 }
1214
1215
1216 void GuiApplication::unregisterSocketCallback(int fd)
1217 {
1218         d->socket_notifiers_.take(fd)->setEnabled(false);
1219 }
1220
1221
1222 void GuiApplication::commitData(QSessionManager & sm)
1223 {
1224         /// The implementation is required to avoid an application exit
1225         /// when session state save is triggered by session manager.
1226         /// The default implementation sends a close event to all
1227         /// visible top level widgets when session managment allows
1228         /// interaction.
1229         /// We are changing that to close all wiew one by one.
1230         /// FIXME: verify if the default implementation is enough now.
1231         if (sm.allowsInteraction() && !closeAllViews())
1232                 sm.cancel();
1233 }
1234
1235
1236 void GuiApplication::unregisterView(GuiView * gv)
1237 {
1238         LASSERT(d->views_[gv->id()] == gv, /**/);
1239         d->views_.remove(gv->id());
1240         if (current_view_ == gv) {
1241                 current_view_ = 0;
1242                 theLyXFunc().setLyXView(0);
1243         }
1244 }
1245
1246
1247 bool GuiApplication::closeAllViews()
1248 {
1249         if (d->views_.empty())
1250                 return true;
1251
1252         QList<GuiView *> views = d->views_.values();
1253         foreach (GuiView * view, views) {
1254                 if (!view->close())
1255                         return false;
1256         }
1257
1258         d->views_.clear();
1259         return true;
1260 }
1261
1262
1263 GuiView & GuiApplication::view(int id) const
1264 {
1265         LASSERT(d->views_.contains(id), /**/);
1266         return *d->views_.value(id);
1267 }
1268
1269
1270 void GuiApplication::hideDialogs(string const & name, Inset * inset) const
1271 {
1272         QList<GuiView *> views = d->views_.values();
1273         foreach (GuiView * view, views)
1274                 view->hideDialog(name, inset);
1275 }
1276
1277
1278 Buffer const * GuiApplication::updateInset(Inset const * inset) const
1279 {
1280         Buffer const * buffer_ = 0;
1281         QHash<int, GuiView *>::iterator end = d->views_.end();
1282         for (QHash<int, GuiView *>::iterator it = d->views_.begin(); it != end; ++it) {
1283                 if (Buffer const * ptr = (*it)->updateInset(inset))
1284                         buffer_ = ptr;
1285         }
1286         return buffer_;
1287 }
1288
1289
1290 bool GuiApplication::searchMenu(FuncRequest const & func,
1291         docstring_list & names) const
1292 {
1293         return d->menus_.searchMenu(func, names);
1294 }
1295
1296
1297 bool GuiApplication::readUIFile(QString const & name, bool include)
1298 {
1299         enum {
1300                 ui_menuset = 1,
1301                 ui_toolbars,
1302                 ui_toolbarset,
1303                 ui_include,
1304                 ui_last
1305         };
1306
1307         LexerKeyword uitags[] = {
1308                 { "include", ui_include },
1309                 { "menuset", ui_menuset },
1310                 { "toolbars", ui_toolbars },
1311                 { "toolbarset", ui_toolbarset }
1312         };
1313
1314         // Ensure that a file is read only once (prevents include loops)
1315         static QStringList uifiles;
1316         if (uifiles.contains(name)) {
1317                 LYXERR(Debug::INIT, "UI file '" << name << "' has been read already. "
1318                                     << "Is this an include loop?");
1319                 return false;
1320         }
1321
1322         LYXERR(Debug::INIT, "About to read " << name << "...");
1323
1324         FileName ui_path;
1325         if (include) {
1326                 ui_path = libFileSearch("ui", name, "inc");
1327                 if (ui_path.empty())
1328                         ui_path = libFileSearch("ui", changeExtension(name, "inc"));
1329         } else {
1330                 ui_path = libFileSearch("ui", name, "ui");
1331         }
1332
1333         if (ui_path.empty()) {
1334                 LYXERR(Debug::INIT, "Could not find " << name);
1335                 Alert::warning(_("Could not find UI defintion file"),
1336                                bformat(_("Error while reading the configuration file\n%1$s.\n"
1337                                    "Please check your installation."), qstring_to_ucs4(name)));
1338                 return false;
1339         }
1340
1341         uifiles.push_back(name);
1342
1343         LYXERR(Debug::INIT, "Found " << name << " in " << ui_path);
1344         Lexer lex(uitags);
1345         lex.setFile(ui_path);
1346         if (!lex.isOK()) {
1347                 lyxerr << "Unable to set LyXLeX for ui file: " << ui_path
1348                        << endl;
1349         }
1350
1351         if (lyxerr.debugging(Debug::PARSER))
1352                 lex.printTable(lyxerr);
1353
1354         while (lex.isOK()) {
1355                 switch (lex.lex()) {
1356                 case ui_include: {
1357                         lex.next(true);
1358                         QString const file = toqstr(lex.getString());
1359                         if (!readUIFile(file, true))
1360                                 return false;
1361                         break;
1362                 }
1363                 case ui_menuset:
1364                         d->menus_.read(lex);
1365                         break;
1366
1367                 case ui_toolbarset:
1368                         d->toolbars_.readToolbars(lex);
1369                         break;
1370
1371                 case ui_toolbars:
1372                         d->toolbars_.readToolbarSettings(lex);
1373                         break;
1374
1375                 default:
1376                         if (!rtrim(lex.getString()).empty())
1377                                 lex.printError("LyX::ReadUIFile: "
1378                                                "Unknown menu tag: `$$Token'");
1379                         break;
1380                 }
1381         }
1382         return true;
1383 }
1384
1385
1386 void GuiApplication::onLastWindowClosed()
1387 {
1388         if (d->global_menubar_)
1389                 d->global_menubar_->grabKeyboard();
1390 }
1391
1392
1393 ////////////////////////////////////////////////////////////////////////
1394 //
1395 // X11 specific stuff goes here...
1396
1397 #ifdef Q_WS_X11
1398 bool GuiApplication::x11EventFilter(XEvent * xev)
1399 {
1400         if (!current_view_)
1401                 return false;
1402
1403         switch (xev->type) {
1404         case SelectionRequest: {
1405                 if (xev->xselectionrequest.selection != XA_PRIMARY)
1406                         break;
1407                 LYXERR(Debug::GUI, "X requested selection.");
1408                 BufferView * bv = current_view_->view();
1409                 if (bv) {
1410                         docstring const sel = bv->requestSelection();
1411                         if (!sel.empty())
1412                                 d->selection_.put(sel);
1413                 }
1414                 break;
1415         }
1416         case SelectionClear: {
1417                 if (xev->xselectionclear.selection != XA_PRIMARY)
1418                         break;
1419                 LYXERR(Debug::GUI, "Lost selection.");
1420                 BufferView * bv = current_view_->view();
1421                 if (bv)
1422                         bv->clearSelection();
1423                 break;
1424         }
1425         }
1426         return false;
1427 }
1428 #endif
1429
1430 } // namespace frontend
1431
1432
1433 void hideDialogs(std::string const & name, Inset * inset)
1434 {
1435         if (theApp())
1436                 theApp()->hideDialogs(name, inset);
1437 }
1438
1439
1440 ////////////////////////////////////////////////////////////////////
1441 //
1442 // Font stuff
1443 //
1444 ////////////////////////////////////////////////////////////////////
1445
1446 frontend::FontLoader & theFontLoader()
1447 {
1448         LASSERT(frontend::guiApp, /**/);
1449         return frontend::guiApp->fontLoader();
1450 }
1451
1452
1453 frontend::FontMetrics const & theFontMetrics(Font const & f)
1454 {
1455         return theFontMetrics(f.fontInfo());
1456 }
1457
1458
1459 frontend::FontMetrics const & theFontMetrics(FontInfo const & f)
1460 {
1461         LASSERT(frontend::guiApp, /**/);
1462         return frontend::guiApp->fontLoader().metrics(f);
1463 }
1464
1465
1466 ////////////////////////////////////////////////////////////////////
1467 //
1468 // Misc stuff
1469 //
1470 ////////////////////////////////////////////////////////////////////
1471
1472 frontend::Clipboard & theClipboard()
1473 {
1474         LASSERT(frontend::guiApp, /**/);
1475         return frontend::guiApp->clipboard();
1476 }
1477
1478
1479 frontend::Selection & theSelection()
1480 {
1481         LASSERT(frontend::guiApp, /**/);
1482         return frontend::guiApp->selection();
1483 }
1484
1485 } // namespace lyx
1486
1487 #include "GuiApplication_moc.cpp"