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1 /**
2  * \file LyX.cpp
3  * This file is part of LyX, the document processor.
4  * Licence details can be found in the file COPYING.
5  *
6  * \author Alfredo Braunstein
7  * \author Lars Gullik Bjønnes
8  * \author Jean-Marc Lasgouttes
9  * \author John Levon
10  * \author André Pönitz
11  *
12  * Full author contact details are available in file CREDITS.
13  */
14
15 #include <config.h>
16 #include <version.h>
17
18 #include "LyX.h"
19
20 #include "AppleSpellChecker.h"
21 #include "AspellChecker.h"
22 #include "Buffer.h"
23 #include "BufferList.h"
24 #include "CmdDef.h"
25 #include "ColorSet.h"
26 #include "ConverterCache.h"
27 #include "Converter.h"
28 #include "CutAndPaste.h"
29 #include "EnchantChecker.h"
30 #include "Encoding.h"
31 #include "ErrorList.h"
32 #include "Format.h"
33 #include "FuncStatus.h"
34 #include "HunspellChecker.h"
35 #include "KeyMap.h"
36 #include "Language.h"
37 #include "LaTeXFonts.h"
38 #include "LayoutFile.h"
39 #include "Lexer.h"
40 #include "LyX.h"
41 #include "LyXAction.h"
42 #include "LyXRC.h"
43 #include "ModuleList.h"
44 #include "Mover.h"
45 #include "Server.h"
46 #include "ServerSocket.h"
47 #include "Session.h"
48 #include "WordList.h"
49
50 #include "frontends/alert.h"
51 #include "frontends/Application.h"
52
53 #include "support/ConsoleApplication.h"
54 #include "support/lassert.h"
55 #include "support/debug.h"
56 #include "support/environment.h"
57 #include "support/ExceptionMessage.h"
58 #include "support/filetools.h"
59 #include "support/gettext.h"
60 #include "support/lstrings.h"
61 #include "support/Messages.h"
62 #include "support/os.h"
63 #include "support/Package.h"
64
65 #include "support/bind.h"
66 #include <boost/scoped_ptr.hpp>
67
68 #include <algorithm>
69 #include <iostream>
70 #include <csignal>
71 #include <map>
72 #include <stdlib.h>
73 #include <string>
74 #include <vector>
75
76 using namespace std;
77 using namespace lyx::support;
78
79 #if defined (USE_MACOSX_PACKAGING)
80 #include <crt_externs.h>
81 #endif
82
83 namespace lyx {
84
85 namespace Alert = frontend::Alert;
86 namespace os = support::os;
87
88
89
90 // Are we using the GUI at all?  We default to true and this is changed
91 // to false when the export feature is used.
92
93 bool use_gui = true;
94
95
96 // We default to open documents in an already running instance, provided that
97 // the lyxpipe has been setup. This can be overridden either on the command
98 // line or through preference settings.
99
100 RunMode run_mode = PREFERRED;
101
102
103 // Tell what files can be silently overwritten during batch export.
104 // Possible values are: NO_FILES, MAIN_FILE, ALL_FILES, UNSPECIFIED.
105 // Unless specified on command line (through the -f switch) or through the
106 // environment variable LYX_FORCE_OVERWRITE, the default will be MAIN_FILE.
107
108 OverwriteFiles force_overwrite = UNSPECIFIED;
109
110
111 namespace {
112
113 // Filled with the command line arguments "foo" of "-sysdir foo" or
114 // "-userdir foo".
115 string cl_system_support;
116 string cl_user_support;
117
118 string geometryArg;
119
120 LyX * singleton_ = 0;
121
122 void showFileError(string const & error)
123 {
124         Alert::warning(_("Could not read configuration file"),
125                        bformat(_("Error while reading the configuration file\n%1$s.\n"
126                            "Please check your installation."), from_utf8(error)));
127 }
128
129 } // namespace anon
130
131 /// The main application class private implementation.
132 struct LyX::Impl {
133         Impl()
134                 : latexfonts_(0), spell_checker_(0), apple_spell_checker_(0), aspell_checker_(0), enchant_checker_(0), hunspell_checker_(0)
135         {}
136
137         ~Impl()
138         {
139                 delete latexfonts_;
140                 delete apple_spell_checker_;
141                 delete aspell_checker_;
142                 delete enchant_checker_;
143                 delete hunspell_checker_;
144         }
145
146         ///
147         BufferList buffer_list_;
148         ///
149         KeyMap toplevel_keymap_;
150         ///
151         CmdDef toplevel_cmddef_;
152         ///
153         boost::scoped_ptr<Server> lyx_server_;
154         ///
155         boost::scoped_ptr<ServerSocket> lyx_socket_;
156         ///
157         boost::scoped_ptr<frontend::Application> application_;
158         /// lyx session, containing lastfiles, lastfilepos, and lastopened
159         boost::scoped_ptr<Session> session_;
160
161         /// Files to load at start.
162         vector<string> files_to_load_;
163
164         /// The messages translators.
165         map<string, Messages> messages_;
166
167         /// The file converters.
168         Converters converters_;
169
170         // The system converters copy after reading lyxrc.defaults.
171         Converters system_converters_;
172
173         ///
174         Movers movers_;
175         ///
176         Movers system_movers_;
177
178         /// has this user started lyx for the first time?
179 //      bool first_start;
180         /// the parsed command line batch command if any
181         vector<string> batch_commands;
182
183         ///
184         LaTeXFonts * latexfonts_;
185
186         ///
187         SpellChecker * spell_checker_;
188         ///
189         SpellChecker * apple_spell_checker_;
190         ///
191         SpellChecker * aspell_checker_;
192         ///
193         SpellChecker * enchant_checker_;
194         ///
195         SpellChecker * hunspell_checker_;
196 };
197
198
199 /// The main application class for console mode
200 class LyXConsoleApp : public ConsoleApplication
201 {
202 public:
203         LyXConsoleApp(LyX * lyx, int & argc, char * argv[])
204                 : ConsoleApplication(lyx_package, argc, argv), lyx_(lyx),
205                   argc_(argc), argv_(argv)
206         {
207         }
208         void doExec()
209         {
210                 int const exit_status = lyx_->execWithoutGui(argc_, argv_);
211                 exit(exit_status);
212         }
213 private:
214         LyX * lyx_;
215         int & argc_;
216         char ** argv_;
217 };
218
219
220 ///
221 frontend::Application * theApp()
222 {
223         if (singleton_)
224                 return singleton_->pimpl_->application_.get();
225         else
226                 return 0;
227 }
228
229
230 LyX::~LyX()
231 {
232         delete pimpl_;
233         singleton_ = 0;
234         WordList::cleanupWordLists();
235 }
236
237
238 void lyx_exit(int exit_code)
239 {
240         if (exit_code)
241                 // Something wrong happened so better save everything, just in
242                 // case.
243                 emergencyCleanup();
244
245 #ifndef NDEBUG
246         // Properly crash in debug mode in order to get a useful backtrace.
247         abort();
248 #endif
249
250         // In release mode, try to exit gracefully.
251         if (theApp())
252                 theApp()->exit(exit_code);
253         else
254                 exit(exit_code);
255 }
256
257
258 LyX::LyX()
259         : first_start(false)
260 {
261         singleton_ = this;
262         pimpl_ = new Impl;
263 }
264
265
266 Messages & LyX::messages(string const & language)
267 {
268         map<string, Messages>::iterator it = pimpl_->messages_.find(language);
269
270         if (it != pimpl_->messages_.end())
271                 return it->second;
272
273         pair<map<string, Messages>::iterator, bool> result =
274                         pimpl_->messages_.insert(make_pair(language, Messages(language)));
275
276         LATTEST(result.second);
277         return result.first->second;
278 }
279
280
281 int LyX::exec(int & argc, char * argv[])
282 {
283         // Minimal setting of locale before parsing command line
284         try {
285                 init_package(os::utf8_argv(0), string(), string());
286                 // we do not get to this point when init_package throws an exception
287                 setLocale();
288         } catch (ExceptionMessage const & message) {
289                 LYXERR(Debug::LOCALE, message.title_ + ", " + message.details_);
290         }
291
292         // Here we need to parse the command line. At least
293         // we need to parse for "-dbg" and "-help"
294         easyParse(argc, argv);
295
296         try {
297                 init_package(os::utf8_argv(0), cl_system_support, cl_user_support);
298         } catch (ExceptionMessage const & message) {
299                 if (message.type_ == ErrorException) {
300                         Alert::error(message.title_, message.details_);
301                         lyx_exit(1);
302                 } else if (message.type_ == WarningException) {
303                         Alert::warning(message.title_, message.details_);
304                 }
305         }
306
307         // Reinit the messages machinery in case package() knows
308         // something interesting about the locale directory.
309         setLocale();
310
311         if (!use_gui) {
312                 LyXConsoleApp app(this, argc, argv);
313
314                 // Reestablish our defaults, as Qt overwrites them
315                 // after creating app
316                 setLocale();//???
317
318                 return app.exec();
319         }
320
321         // Let the frontend parse and remove all arguments that it knows
322         pimpl_->application_.reset(createApplication(argc, argv));
323
324         // Reestablish our defaults, as Qt overwrites them
325         // after createApplication()
326         setLocale();//???
327
328         // Parse and remove all known arguments in the LyX singleton
329         // Give an error for all remaining ones.
330         int exit_status = init(argc, argv);
331         if (exit_status) {
332                 // Kill the application object before exiting.
333                 pimpl_->application_.reset();
334                 use_gui = false;
335                 prepareExit();
336                 return exit_status;
337         }
338
339         // If not otherwise specified by a command line option or
340         // by preferences, we default to reuse a running instance.
341         if (run_mode == PREFERRED)
342                 run_mode = USE_REMOTE;
343
344         // FIXME
345         /* Create a CoreApplication class that will provide the main event loop
346         * and the socket callback registering. With Qt, only QtCore
347         * library would be needed.
348         * When this is done, a server_mode could be created and the following two
349         * line would be moved out from here.
350         * However, note that the first of the two lines below triggers the
351         * "single instance" behavior, which should occur right at this point.
352         */
353         // Note: socket callback must be registered after init(argc, argv)
354         // such that package().temp_dir() is properly initialized.
355         pimpl_->lyx_server_.reset(new Server(lyxrc.lyxpipes));
356         pimpl_->lyx_socket_.reset(new ServerSocket(
357                         FileName(package().temp_dir().absFileName() + "/lyxsocket")));
358
359         // Start the real execution loop.
360         if (!theServer().deferredLoadingToOtherInstance())
361                 exit_status = pimpl_->application_->exec();
362         else if (!pimpl_->files_to_load_.empty()) {
363                 vector<string>::const_iterator it = pimpl_->files_to_load_.begin();
364                 vector<string>::const_iterator end = pimpl_->files_to_load_.end();
365                 lyxerr << _("The following files could not be loaded:") << endl;
366                 for (; it != end; ++it)
367                         lyxerr << *it << endl;
368         }
369
370         prepareExit();
371
372         return exit_status;
373 }
374
375
376 void LyX::prepareExit()
377 {
378         // Clear the clipboard and selection stack:
379         cap::clearCutStack();
380         cap::clearSelection();
381
382         // Write the index file of the converter cache
383         ConverterCache::get().writeIndex();
384
385         // close buffers first
386         pimpl_->buffer_list_.closeAll();
387
388         // register session changes and shutdown server and socket
389         if (use_gui) {
390                 if (pimpl_->session_)
391                         pimpl_->session_->writeFile();
392                 pimpl_->session_.reset();
393                 pimpl_->lyx_server_.reset();
394                 pimpl_->lyx_socket_.reset();
395         }
396
397         // do any other cleanup procedures now
398         if (package().temp_dir() != package().system_temp_dir()) {
399                 string const abs_tmpdir = package().temp_dir().absFileName();
400                 if (!contains(package().temp_dir().absFileName(), "lyx_tmpdir")) {
401                         docstring const msg =
402                                 bformat(_("%1$s does not appear like a LyX created temporary directory."),
403                                 from_utf8(abs_tmpdir));
404                         Alert::warning(_("Cannot remove temporary directory"), msg);
405                 } else {
406                         LYXERR(Debug::INFO, "Deleting tmp dir "
407                                 << package().temp_dir().absFileName());
408                         if (!package().temp_dir().destroyDirectory()) {
409                                 docstring const msg =
410                                         bformat(_("Unable to remove the temporary directory %1$s"),
411                                         from_utf8(package().temp_dir().absFileName()));
412                                 Alert::warning(_("Unable to remove temporary directory"), msg);
413                         }
414                 }
415         }
416
417         // Kill the application object before exiting. This avoids crashes
418         // when exiting on Linux.
419         pimpl_->application_.reset();
420 }
421
422
423 void LyX::earlyExit(int status)
424 {
425         LATTEST(pimpl_->application_.get());
426         // LyX::pimpl_::application_ is not initialised at this
427         // point so it's safe to just exit after some cleanup.
428         prepareExit();
429         exit(status);
430 }
431
432
433 int LyX::init(int & argc, char * argv[])
434 {
435         // check for any spurious extra arguments
436         // other than documents
437         for (int argi = 1; argi < argc ; ++argi) {
438                 if (argv[argi][0] == '-') {
439                         lyxerr << to_utf8(
440                                 bformat(_("Wrong command line option `%1$s'. Exiting."),
441                                 from_utf8(os::utf8_argv(argi)))) << endl;
442                         return EXIT_FAILURE;
443                 }
444         }
445
446         // Initialization of LyX (reads lyxrc and more)
447         LYXERR(Debug::INIT, "Initializing LyX::init...");
448         bool success = init();
449         LYXERR(Debug::INIT, "Initializing LyX::init...done");
450         if (!success)
451                 return EXIT_FAILURE;
452
453         // Remaining arguments are assumed to be files to load.
454         for (int argi = 1; argi < argc; ++argi)
455                 pimpl_->files_to_load_.push_back(os::utf8_argv(argi));
456
457         if (!use_gui && pimpl_->files_to_load_.empty()) {
458                 lyxerr << to_utf8(_("Missing filename for this operation.")) << endl;
459                 return EXIT_FAILURE;
460         }
461
462         if (first_start) {
463                 pimpl_->files_to_load_.push_back(
464                         i18nLibFileSearch("examples", "splash.lyx").absFileName());
465         }
466
467         return EXIT_SUCCESS;
468 }
469
470
471 int LyX::execWithoutGui(int & argc, char * argv[])
472 {
473         int exit_status = init(argc, argv);
474         if (exit_status) {
475                 prepareExit(); 
476                 return exit_status;   
477         }                      
478
479         // this is correct, since return values are inverted.
480         exit_status = !loadFiles();
481
482         if (pimpl_->batch_commands.empty() || pimpl_->buffer_list_.empty()) {
483                 prepareExit();
484                 return exit_status;
485         }
486
487         BufferList::iterator begin = pimpl_->buffer_list_.begin();
488
489         bool final_success = false;
490         for (BufferList::iterator I = begin; I != pimpl_->buffer_list_.end(); ++I) {
491                 Buffer * buf = *I;
492                 if (buf != buf->masterBuffer())
493                         continue;
494                 vector<string>::const_iterator bcit  = pimpl_->batch_commands.begin();
495                 vector<string>::const_iterator bcend = pimpl_->batch_commands.end();
496                 DispatchResult dr;
497                 for (; bcit != bcend; ++bcit) {
498                         LYXERR(Debug::ACTION, "Buffer::dispatch: cmd: " << *bcit);
499                         buf->dispatch(*bcit, dr);
500                         final_success |= !dr.error();
501                 }
502         }
503         prepareExit();
504         return !final_success;
505 }
506
507
508 bool LyX::loadFiles()
509 {
510         LATTEST(!use_gui);
511         bool success = true;
512         vector<string>::const_iterator it = pimpl_->files_to_load_.begin();
513         vector<string>::const_iterator end = pimpl_->files_to_load_.end();
514
515         for (; it != end; ++it) {
516                 // get absolute path of file and add ".lyx" to
517                 // the filename if necessary
518                 FileName fname = fileSearch(string(), os::internal_path(*it), "lyx",
519                         may_not_exist);
520
521                 if (fname.empty())
522                         continue;
523
524                 Buffer * buf = pimpl_->buffer_list_.newBuffer(fname.absFileName());
525                 if (buf->loadLyXFile() == Buffer::ReadSuccess) {
526                         ErrorList const & el = buf->errorList("Parse");
527                         if (!el.empty())
528                                 for_each(el.begin(), el.end(),
529                                 bind(&LyX::printError, this, _1));
530                 }
531                 else {
532                         pimpl_->buffer_list_.release(buf);
533                         docstring const error_message =
534                                 bformat(_("LyX failed to load the following file: %1$s"),
535                                 from_utf8(fname.absFileName()));
536                         lyxerr << to_utf8(error_message) << endl;
537                         success = false;
538                 }
539         }
540         return success;
541 }
542
543
544 void execBatchCommands()
545 {
546         LAPPERR(singleton_);
547         singleton_->execCommands();
548 }
549
550
551 void LyX::execCommands()
552 {
553         // The advantage of doing this here is that the event loop
554         // is already started. So any need for interaction will be
555         // aknowledged.
556
557         // if reconfiguration is needed.
558         if (LayoutFileList::get().empty()) {
559                 switch (Alert::prompt(
560                         _("No textclass is found"),
561                         _("LyX will only have minimal functionality because no textclasses "
562                                 "have been found. You can either try to reconfigure LyX normally, "
563                                 "try to reconfigure without checking your LaTeX installation, or continue."),
564                         0, 2,
565                         _("&Reconfigure"),
566                         _("&Without LaTeX"),
567                         _("&Continue")))
568                 {
569                 case 0:
570                         // regular reconfigure
571                         lyx::dispatch(FuncRequest(LFUN_RECONFIGURE, ""));
572                         break;
573                 case 1:
574                         // reconfigure --without-latex-config
575                         lyx::dispatch(FuncRequest(LFUN_RECONFIGURE,
576                                 " --without-latex-config"));
577                         break;
578                 default:
579                         break;
580                 }
581         }
582
583         // create the first main window
584         lyx::dispatch(FuncRequest(LFUN_WINDOW_NEW, geometryArg));
585
586         if (!pimpl_->files_to_load_.empty()) {
587                 // if some files were specified at command-line we assume that the
588                 // user wants to edit *these* files and not to restore the session.
589                 for (size_t i = 0; i != pimpl_->files_to_load_.size(); ++i) {
590                         lyx::dispatch(
591                                 FuncRequest(LFUN_FILE_OPEN, pimpl_->files_to_load_[i]));
592                 }
593                 // clear this list to save a few bytes of RAM
594                 pimpl_->files_to_load_.clear();
595         } else
596                 pimpl_->application_->restoreGuiSession();
597
598         // Execute batch commands if available
599         if (pimpl_->batch_commands.empty())
600                 return;
601
602         vector<string>::const_iterator bcit  = pimpl_->batch_commands.begin();
603         vector<string>::const_iterator bcend = pimpl_->batch_commands.end();
604         for (; bcit != bcend; ++bcit) {
605                 LYXERR(Debug::INIT, "About to handle -x '" << *bcit << '\'');
606                 lyx::dispatch(lyxaction.lookupFunc(*bcit));
607         }
608 }
609
610
611 /*
612 Signals and Windows
613 ===================
614 The SIGHUP signal does not exist on Windows and does not need to be handled.
615
616 Windows handles SIGFPE and SIGSEGV signals as expected.
617
618 Ctrl+C interrupts (mapped to SIGINT by Windows' POSIX compatability layer)
619 cause a new thread to be spawned. This may well result in unexpected
620 behaviour by the single-threaded LyX.
621
622 SIGTERM signals will come only from another process actually sending
623 that signal using 'raise' in Windows' POSIX compatability layer. It will
624 not come from the general "terminate process" methods that everyone
625 actually uses (and which can't be trapped). Killing an app 'politely' on
626 Windows involves first sending a WM_CLOSE message, something that is
627 caught already by the Qt frontend.
628
629 For more information see:
630
631 http://aspn.activestate.com/ASPN/Mail/Message/ActiveTcl/2034055
632 ...signals are mostly useless on Windows for a variety of reasons that are
633 Windows specific...
634
635 'UNIX Application Migration Guide, Chapter 9'
636 http://msdn.microsoft.com/library/en-us/dnucmg/html/UCMGch09.asp
637
638 'How To Terminate an Application "Cleanly" in Win32'
639 http://support.microsoft.com/default.aspx?scid=kb;en-us;178893
640 */
641 extern "C" {
642
643 static void error_handler(int err_sig)
644 {
645         // Throw away any signals other than the first one received.
646         static sig_atomic_t handling_error = false;
647         if (handling_error)
648                 return;
649         handling_error = true;
650
651         // We have received a signal indicating a fatal error, so
652         // try and save the data ASAP.
653         emergencyCleanup();
654
655         // These lyxerr calls may or may not work:
656
657         // Signals are asynchronous, so the main program may be in a very
658         // fragile state when a signal is processed and thus while a signal
659         // handler function executes.
660         // In general, therefore, we should avoid performing any
661         // I/O operations or calling most library and system functions from
662         // signal handlers.
663
664         // This shouldn't matter here, however, as we've already invoked
665         // emergencyCleanup.
666         docstring msg;
667         switch (err_sig) {
668 #ifdef SIGHUP
669         case SIGHUP:
670                 msg = _("SIGHUP signal caught!\nBye.");
671                 break;
672 #endif
673         case SIGFPE:
674                 msg = _("SIGFPE signal caught!\nBye.");
675                 break;
676         case SIGSEGV:
677                 msg = _("SIGSEGV signal caught!\n"
678                           "Sorry, you have found a bug in LyX, "
679                           "hope you have not lost any data.\n"
680                           "Please read the bug-reporting instructions "
681                           "in 'Help->Introduction' and send us a bug report, "
682                           "if necessary. Thanks!\nBye.");
683                 break;
684         case SIGINT:
685         case SIGTERM:
686                 // no comments
687                 break;
688         }
689
690         if (!msg.empty()) {
691                 lyxerr << "\nlyx: " << msg << endl;
692                 // try to make a GUI message
693                 Alert::error(_("LyX crashed!"), msg, true);
694         }
695
696         // Deinstall the signal handlers
697 #ifdef SIGHUP
698         signal(SIGHUP, SIG_DFL);
699 #endif
700         signal(SIGINT, SIG_DFL);
701         signal(SIGFPE, SIG_DFL);
702         signal(SIGSEGV, SIG_DFL);
703         signal(SIGTERM, SIG_DFL);
704
705 #ifdef SIGHUP
706         if (err_sig == SIGSEGV ||
707                 (err_sig != SIGHUP && !getEnv("LYXDEBUG").empty())) {
708 #else
709         if (err_sig == SIGSEGV || !getEnv("LYXDEBUG").empty()) {
710 #endif
711 #ifdef _MSC_VER
712                 // with abort() it crashes again.
713                 exit(err_sig);
714 #else
715                 abort();
716 #endif
717         }
718
719         exit(0);
720 }
721
722 }
723
724
725 void LyX::printError(ErrorItem const & ei)
726 {
727         docstring tmp = _("LyX: ") + ei.error + char_type(':')
728                 + ei.description;
729         cerr << to_utf8(tmp) << endl;
730 }
731
732 #if defined (USE_MACOSX_PACKAGING)
733 namespace {
734         // Unexposed--extract an environment variable name from its NAME=VALUE
735         // representation
736         std::string varname(const char* line)
737         {
738                 size_t nameLen = strcspn(line, "=");
739                 if (nameLen == strlen(line)) {
740                         return std::string();
741                 } else {
742                         return std::string(line, nameLen);
743                 }
744         }
745 }
746
747 void cleanDuplicateEnvVars()
748 {
749         std::set<std::string> seen;
750         std::set<std::string> dupes;
751
752         // Create a list of the environment variables that appear more than once
753         for (char **read = *_NSGetEnviron(); *read; read++) {
754                 std::string name = varname(*read);
755                 if (name.size() == 0) {
756                         continue;
757                 }
758                 if (seen.find(name) != seen.end()) {
759                         dupes.insert(name);
760                 } else {
761                         seen.insert(name);
762                 }
763         }
764
765         // Loop over the list of duplicated variables
766         std::set<std::string>::iterator dupe = dupes.begin();
767         std::set<std::string>::iterator const dend = dupes.end();       
768         for (; dupe != dend; ++dupe) {
769                 const char *name = (*dupe).c_str();
770                 char *val = getenv(name);
771                 if (val != NULL) {
772                         LYXERR(Debug::INIT, "Duplicate environment variable: " << name);
773                         // unsetenv removes *all* instances of the variable from the environment
774                         unsetenv(name);
775
776                         // replace with the value from getenv (in practice appears to be the
777                         // first value in the list)
778                         setenv(name, val, 0);
779                 }
780         }
781 }
782 #endif
783
784 bool LyX::init()
785 {
786 #ifdef SIGHUP
787         signal(SIGHUP, error_handler);
788 #endif
789         signal(SIGFPE, error_handler);
790         signal(SIGSEGV, error_handler);
791         signal(SIGINT, error_handler);
792         signal(SIGTERM, error_handler);
793         // SIGPIPE can be safely ignored.
794
795 #if defined (USE_MACOSX_PACKAGING)
796         cleanDuplicateEnvVars();
797 #endif
798
799         lyxrc.tempdir_path = package().temp_dir().absFileName();
800         lyxrc.document_path = package().document_dir().absFileName();
801
802         if (lyxrc.example_path.empty()) {
803                 lyxrc.example_path = addPath(package().system_support().absFileName(),
804                                               "examples");
805         }
806         if (lyxrc.template_path.empty()) {
807                 lyxrc.template_path = addPath(package().system_support().absFileName(),
808                                               "templates");
809         }
810
811         // init LyXDir environment variable
812         string const lyx_dir = package().lyx_dir().absFileName();
813         LYXERR(Debug::INIT, "Setting LyXDir... to \"" << lyx_dir << "\"");
814         if (!setEnv("LyXDir", lyx_dir))
815                 LYXERR(Debug::INIT, "\t... failed!");
816
817         if (package().explicit_user_support() && getEnv(LYX_USERDIR_VER).empty()) {
818                 // -userdir was given on the command line.
819                 // Make it available to child processes, otherwise tex2lyx
820                 // would not find all layout files, and other converters might
821                 // use it as well.
822                 string const user_dir = package().user_support().absFileName();
823                 LYXERR(Debug::INIT, "Setting " LYX_USERDIR_VER "... to \""
824                                     << user_dir << '"');
825                 if (!setEnv(LYX_USERDIR_VER, user_dir))
826                         LYXERR(Debug::INIT, "\t... failed!");
827         }
828
829         //
830         // Read configuration files
831         //
832
833         // This one may have been distributed along with LyX.
834         if (!readRcFile("lyxrc.dist"))
835                 return false;
836
837         // Set the PATH correctly.
838 #if !defined (USE_POSIX_PACKAGING)
839         // Add the directory containing the LyX executable to the path
840         // so that LyX can find things like tex2lyx.
841         if (package().build_support().empty())
842                 prependEnvPath("PATH", package().binary_dir().absFileName());
843 #endif
844         if (!lyxrc.path_prefix.empty())
845                 prependEnvPath("PATH", replaceEnvironmentPath(lyxrc.path_prefix));
846
847         // Check that user LyX directory is ok.
848         {
849                 string const lock_file = package().getConfigureLockName();
850                 int fd = fileLock(lock_file.c_str());
851
852                 if (queryUserLyXDir(package().explicit_user_support())) {
853                         package().reconfigureUserLyXDir("");
854                 }
855                 fileUnlock(fd, lock_file.c_str());
856         }
857
858         if (!use_gui) {
859                 // No need for a splash when there is no GUI
860                 first_start = false;
861                 // Default is to overwrite the main file during export, unless
862                 // the -f switch was specified or LYX_FORCE_OVERWRITE was set
863                 if (force_overwrite == UNSPECIFIED) {
864                         string const what = getEnv("LYX_FORCE_OVERWRITE");
865                         if (what == "all")
866                                 force_overwrite = ALL_FILES;
867                         else if (what == "none")
868                                 force_overwrite = NO_FILES;
869                         else
870                                 force_overwrite = MAIN_FILE;
871                 }
872         }
873
874         // This one is generated in user_support directory by lib/configure.py.
875         if (!readRcFile("lyxrc.defaults"))
876                 return false;
877
878         // Query the OS to know what formats are viewed natively
879         formats.setAutoOpen();
880
881         // Read lyxrc.dist again to be able to override viewer auto-detection.
882         readRcFile("lyxrc.dist");
883
884         system_lyxrc = lyxrc;
885         system_formats = formats;
886         pimpl_->system_converters_ = pimpl_->converters_;
887         pimpl_->system_movers_ = pimpl_->movers_;
888         system_lcolor = lcolor;
889
890         // This one is edited through the preferences dialog.
891         if (!readRcFile("preferences", true))
892                 return false;
893
894         // The language may have been set to someting useful through prefs
895         setLocale();
896
897         if (!readEncodingsFile("encodings", "unicodesymbols"))
898                 return false;
899         if (!readLanguagesFile("languages"))
900                 return false;
901
902         LYXERR(Debug::INIT, "Reading layouts...");
903         // Load the layouts
904         LayoutFileList::get().read();
905         //...and the modules
906         theModuleList.read();
907
908         // read keymap and ui files in batch mode as well
909         // because InsetInfo needs to know these to produce
910         // the correct output
911
912         // Set up command definitions
913         pimpl_->toplevel_cmddef_.read(lyxrc.def_file);
914
915         // FIXME
916         // Set up bindings
917         pimpl_->toplevel_keymap_.read("site");
918         pimpl_->toplevel_keymap_.read(lyxrc.bind_file);
919         // load user bind file user.bind
920         pimpl_->toplevel_keymap_.read("user", 0, KeyMap::MissingOK);
921
922         if (lyxerr.debugging(Debug::LYXRC))
923                 lyxrc.print();
924
925         os::windows_style_tex_paths(lyxrc.windows_style_tex_paths);
926         // Prepend path prefix a second time to take the user preferences into a account
927         if (!lyxrc.path_prefix.empty())
928                 prependEnvPath("PATH", replaceEnvironmentPath(lyxrc.path_prefix));
929
930         FileName const document_path(lyxrc.document_path);
931         if (document_path.exists() && document_path.isDirectory())
932                 package().document_dir() = document_path;
933
934         package().set_temp_dir(createLyXTmpDir(FileName(lyxrc.tempdir_path)));
935         if (package().temp_dir().empty()) {
936                 Alert::error(_("Could not create temporary directory"),
937                              bformat(_("Could not create a temporary directory in\n"
938                                                        "\"%1$s\"\n"
939                                                            "Make sure that this path exists and is writable and try again."),
940                                      from_utf8(lyxrc.tempdir_path)));
941                 // createLyXTmpDir() tries sufficiently hard to create a
942                 // usable temp dir, so the probability to come here is
943                 // close to zero. We therefore don't try to overcome this
944                 // problem with e.g. asking the user for a new path and
945                 // trying again but simply exit.
946                 return false;
947         }
948
949         LYXERR(Debug::INIT, "LyX tmp dir: `"
950                             << package().temp_dir().absFileName() << '\'');
951
952         LYXERR(Debug::INIT, "Reading session information '.lyx/session'...");
953         pimpl_->session_.reset(new Session(lyxrc.num_lastfiles));
954
955         // This must happen after package initialization and after lyxrc is
956         // read, therefore it can't be done by a static object.
957         ConverterCache::init();
958
959         return true;
960 }
961
962
963 void emergencyCleanup()
964 {
965         // what to do about tmpfiles is non-obvious. we would
966         // like to delete any we find, but our lyxdir might
967         // contain documents etc. which might be helpful on
968         // a crash
969
970         singleton_->pimpl_->buffer_list_.emergencyWriteAll();
971         if (use_gui) {
972                 if (singleton_->pimpl_->lyx_server_)
973                         singleton_->pimpl_->lyx_server_->emergencyCleanup();
974                 singleton_->pimpl_->lyx_server_.reset();
975                 singleton_->pimpl_->lyx_socket_.reset();
976         }
977 }
978
979
980 bool LyX::queryUserLyXDir(bool explicit_userdir)
981 {
982         // Does user directory exist?
983         FileName const sup = package().user_support();
984         if (sup.exists() && sup.isDirectory()) {
985                 first_start = false;
986
987                 return configFileNeedsUpdate("lyxrc.defaults")
988                         || configFileNeedsUpdate("lyxmodules.lst")
989                         || configFileNeedsUpdate("textclass.lst")
990                         || configFileNeedsUpdate("packages.lst");
991         }
992
993         first_start = !explicit_userdir;
994
995         // If the user specified explicitly a directory, ask whether
996         // to create it. If the user says "no", then exit.
997         if (explicit_userdir &&
998             Alert::prompt(
999                     _("Missing user LyX directory"),
1000                     bformat(_("You have specified a non-existent user "
1001                                            "LyX directory, %1$s.\n"
1002                                            "It is needed to keep your own configuration."),
1003                             from_utf8(package().user_support().absFileName())),
1004                     1, 0,
1005                     _("&Create directory"),
1006                     _("&Exit LyX"))) {
1007                 lyxerr << to_utf8(_("No user LyX directory. Exiting.")) << endl;
1008                 earlyExit(EXIT_FAILURE);
1009         }
1010
1011         lyxerr << to_utf8(bformat(_("LyX: Creating directory %1$s"),
1012                           from_utf8(sup.absFileName()))) << endl;
1013
1014         if (!sup.createDirectory(0755)) {
1015                 // Failed, so let's exit.
1016                 lyxerr << to_utf8(_("Failed to create directory. Exiting."))
1017                        << endl;
1018                 earlyExit(EXIT_FAILURE);
1019         }
1020
1021         return true;
1022 }
1023
1024
1025 bool LyX::readRcFile(string const & name, bool check_format)
1026 {
1027         LYXERR(Debug::INIT, "About to read " << name << "... ");
1028
1029         FileName const lyxrc_path = libFileSearch(string(), name);
1030         if (lyxrc_path.empty()) {
1031                 LYXERR(Debug::INIT, "Not found." << lyxrc_path);
1032                 // FIXME
1033                 // This was the previous logic, but can it be right??
1034                 return true;
1035         }
1036         LYXERR(Debug::INIT, "Found in " << lyxrc_path);
1037         bool const success = lyxrc.read(lyxrc_path, check_format);
1038         if (!success)
1039                 showFileError(name);
1040         return success;
1041 }
1042
1043 // Read the languages file `name'
1044 bool LyX::readLanguagesFile(string const & name)
1045 {
1046         LYXERR(Debug::INIT, "About to read " << name << "...");
1047
1048         FileName const lang_path = libFileSearch(string(), name);
1049         if (lang_path.empty()) {
1050                 showFileError(name);
1051                 return false;
1052         }
1053         languages.read(lang_path);
1054         return true;
1055 }
1056
1057
1058 // Read the encodings file `name'
1059 bool LyX::readEncodingsFile(string const & enc_name,
1060                             string const & symbols_name)
1061 {
1062         LYXERR(Debug::INIT, "About to read " << enc_name << " and "
1063                             << symbols_name << "...");
1064
1065         FileName const symbols_path = libFileSearch(string(), symbols_name);
1066         if (symbols_path.empty()) {
1067                 showFileError(symbols_name);
1068                 return false;
1069         }
1070
1071         FileName const enc_path = libFileSearch(string(), enc_name);
1072         if (enc_path.empty()) {
1073                 showFileError(enc_name);
1074                 return false;
1075         }
1076         encodings.read(enc_path, symbols_path);
1077         return true;
1078 }
1079
1080
1081 namespace {
1082
1083 /// return the the number of arguments consumed
1084 typedef boost::function<int(string const &, string const &, string &)> cmd_helper;
1085
1086 int parse_dbg(string const & arg, string const &, string &)
1087 {
1088         if (arg.empty()) {
1089                 cout << to_utf8(_("List of supported debug flags:")) << endl;
1090                 Debug::showTags(cout);
1091                 exit(0);
1092         }
1093         lyxerr << to_utf8(bformat(_("Setting debug level to %1$s"), from_utf8(arg))) << endl;
1094
1095         lyxerr.setLevel(Debug::value(arg));
1096         Debug::showLevel(lyxerr, lyxerr.level());
1097         return 1;
1098 }
1099
1100
1101 int parse_help(string const &, string const &, string &)
1102 {
1103         cout <<
1104                 to_utf8(_("Usage: lyx [ command line switches ] [ name.lyx ... ]\n"
1105                   "Command line switches (case sensitive):\n"
1106                   "\t-help              summarize LyX usage\n"
1107                   "\t-userdir dir       set user directory to dir\n"
1108                   "\t-sysdir dir        set system directory to dir\n"
1109                   "\t-geometry WxH+X+Y  set geometry of the main window\n"
1110                   "\t-dbg feature[,feature]...\n"
1111                   "                  select the features to debug.\n"
1112                   "                  Type `lyx -dbg' to see the list of features\n"
1113                   "\t-x [--execute] command\n"
1114                   "                  where command is a lyx command.\n"
1115                   "\t-e [--export] fmt\n"
1116                   "                  where fmt is the export format of choice. Look in\n"
1117                   "                  Tools->Preferences->File Handling->File Formats->Short Name\n"
1118                   "                  to see which parameter (which differs from the format name\n"
1119                   "                  in the File->Export menu) should be passed.\n"
1120                   "                  Note that the order of -e and -x switches matters.\n"
1121                   "\t-E [--export-to] fmt filename\n"
1122                   "                  where fmt is the export format of choice (see --export),\n"
1123                   "                  and filename is the destination filename.\n"
1124                   "\t-i [--import] fmt file.xxx\n"
1125                   "                  where fmt is the import format of choice\n"
1126                   "                  and file.xxx is the file to be imported.\n"
1127                   "\t-f [--force-overwrite] what\n"
1128                   "                  where what is either `all', `main' or `none',\n"
1129                   "                  specifying whether all files, main file only, or no files,\n"
1130                   "                  respectively, are to be overwritten during a batch export.\n"
1131                   "                  Anything else is equivalent to `all', but is not consumed.\n"
1132                   "\t-n [--no-remote]\n"
1133                   "                  open documents in a new instance\n"
1134                   "\t-r [--remote]\n"
1135                   "                  open documents in an already running instance\n"
1136                   "                  (a working lyxpipe is needed)\n"
1137                   "\t-batch    execute commands without launching GUI and exit.\n"
1138                   "\t-version  summarize version and build info\n"
1139                                "Check the LyX man page for more details.")) << endl;
1140         exit(0);
1141         return 0;
1142 }
1143
1144
1145 int parse_version(string const &, string const &, string &)
1146 {
1147         cout << "LyX " << lyx_version
1148                << " (" << lyx_release_date << ")" << endl;
1149         if (string(lyx_git_commit_hash) != "none")
1150                 cout << to_utf8(_("  Git commit hash "))
1151                      << string(lyx_git_commit_hash).substr(0,8) << endl;
1152         cout << to_utf8(bformat(_("Built on %1$s[[date]], %2$s[[time]]"),
1153                 from_ascii(lyx_build_date), from_ascii(lyx_build_time))) << endl;
1154         cout << lyx_version_info << endl;
1155         exit(0);
1156         return 0;
1157 }
1158
1159
1160 int parse_sysdir(string const & arg, string const &, string &)
1161 {
1162         if (arg.empty()) {
1163                 Alert::error(_("No system directory"),
1164                         _("Missing directory for -sysdir switch"));
1165                 exit(1);
1166         }
1167         cl_system_support = arg;
1168         return 1;
1169 }
1170
1171
1172 int parse_userdir(string const & arg, string const &, string &)
1173 {
1174         if (arg.empty()) {
1175                 Alert::error(_("No user directory"),
1176                         _("Missing directory for -userdir switch"));
1177                 exit(1);
1178         }
1179         cl_user_support = arg;
1180         return 1;
1181 }
1182
1183
1184 int parse_execute(string const & arg, string const &, string & batch)
1185 {
1186         if (arg.empty()) {
1187                 Alert::error(_("Incomplete command"),
1188                         _("Missing command string after --execute switch"));
1189                 exit(1);
1190         }
1191         batch = arg;
1192         return 1;
1193 }
1194
1195
1196 int parse_export_to(string const & type, string const & output_file, string & batch)
1197 {
1198         if (type.empty()) {
1199                 lyxerr << to_utf8(_("Missing file type [eg latex, ps...] after "
1200                                          "--export-to switch")) << endl;
1201                 exit(1);
1202         }
1203         if (output_file.empty()) {
1204                 lyxerr << to_utf8(_("Missing destination filename after "
1205                                          "--export-to switch")) << endl;
1206                 exit(1);
1207         }
1208         batch = "buffer-export " + type + " " + output_file;
1209         use_gui = false;
1210         return 2;
1211 }
1212
1213
1214 int parse_export(string const & type, string const &, string & batch)
1215 {
1216         if (type.empty()) {
1217                 lyxerr << to_utf8(_("Missing file type [eg latex, ps...] after "
1218                                          "--export switch")) << endl;
1219                 exit(1);
1220         }
1221         batch = "buffer-export " + type;
1222         use_gui = false;
1223         return 1;
1224 }
1225
1226
1227 int parse_import(string const & type, string const & file, string & batch)
1228 {
1229         if (type.empty()) {
1230                 lyxerr << to_utf8(_("Missing file type [eg latex, ps...] after "
1231                                          "--import switch")) << endl;
1232                 exit(1);
1233         }
1234         if (file.empty()) {
1235                 lyxerr << to_utf8(_("Missing filename for --import")) << endl;
1236                 exit(1);
1237         }
1238         batch = "buffer-import " + type + ' ' + file;
1239         return 2;
1240 }
1241
1242
1243 int parse_geometry(string const & arg1, string const &, string &)
1244 {
1245         geometryArg = arg1;
1246         // don't remove "-geometry", it will be pruned out later in the
1247         // frontend if need be.
1248         return -1;
1249 }
1250
1251
1252 int parse_batch(string const &, string const &, string &)
1253 {
1254         use_gui = false;
1255         return 0;
1256 }
1257
1258
1259 int parse_noremote(string const &, string const &, string &)
1260 {
1261         run_mode = NEW_INSTANCE;
1262         return 0;
1263 }
1264
1265
1266 int parse_remote(string const &, string const &, string &)
1267 {
1268         run_mode = USE_REMOTE;
1269         return 0;
1270 }
1271
1272
1273 int parse_force(string const & arg, string const &, string &)
1274 {
1275         if (arg == "all") {
1276                 force_overwrite = ALL_FILES;
1277                 return 1;
1278         } else if (arg == "main") {
1279                 force_overwrite = MAIN_FILE;
1280                 return 1;
1281         } else if (arg == "none") {
1282                 force_overwrite = NO_FILES;
1283                 return 1;
1284         }
1285         force_overwrite = ALL_FILES;
1286         return 0;
1287 }
1288
1289
1290 } // namespace anon
1291
1292
1293 void LyX::easyParse(int & argc, char * argv[])
1294 {
1295         map<string, cmd_helper> cmdmap;
1296
1297         cmdmap["-dbg"] = parse_dbg;
1298         cmdmap["-help"] = parse_help;
1299         cmdmap["--help"] = parse_help;
1300         cmdmap["-version"] = parse_version;
1301         cmdmap["--version"] = parse_version;
1302         cmdmap["-sysdir"] = parse_sysdir;
1303         cmdmap["-userdir"] = parse_userdir;
1304         cmdmap["-x"] = parse_execute;
1305         cmdmap["--execute"] = parse_execute;
1306         cmdmap["-e"] = parse_export;
1307         cmdmap["--export"] = parse_export;
1308         cmdmap["-E"] = parse_export_to;
1309         cmdmap["--export-to"] = parse_export_to;
1310         cmdmap["-i"] = parse_import;
1311         cmdmap["--import"] = parse_import;
1312         cmdmap["-geometry"] = parse_geometry;
1313         cmdmap["-batch"] = parse_batch;
1314         cmdmap["-f"] = parse_force;
1315         cmdmap["--force-overwrite"] = parse_force;
1316         cmdmap["-n"] = parse_noremote;
1317         cmdmap["--no-remote"] = parse_noremote;
1318         cmdmap["-r"] = parse_remote;
1319         cmdmap["--remote"] = parse_remote;
1320
1321         for (int i = 1; i < argc; ++i) {
1322                 map<string, cmd_helper>::const_iterator it
1323                         = cmdmap.find(argv[i]);
1324
1325                 // don't complain if not found - may be parsed later
1326                 if (it == cmdmap.end())
1327                         continue;
1328
1329                 string const arg =
1330                         (i + 1 < argc) ? os::utf8_argv(i + 1) : string();
1331                 string const arg2 =
1332                         (i + 2 < argc) ? os::utf8_argv(i + 2) : string();
1333
1334                 string batch;
1335                 int const remove = 1 + it->second(arg, arg2, batch);
1336                 if (!batch.empty())
1337                         pimpl_->batch_commands.push_back(batch);
1338
1339                 // Now, remove used arguments by shifting
1340                 // the following ones remove places down.
1341                 if (remove > 0) {
1342                         os::remove_internal_args(i, remove);
1343                         argc -= remove;
1344                         for (int j = i; j < argc; ++j)
1345                                 argv[j] = argv[j + remove];
1346                         --i;
1347                 }
1348         }
1349 }
1350
1351
1352 FuncStatus getStatus(FuncRequest const & action)
1353 {
1354         LAPPERR(theApp());
1355         return theApp()->getStatus(action);
1356 }
1357
1358
1359 void dispatch(FuncRequest const & action)
1360 {
1361         LAPPERR(theApp());
1362         return theApp()->dispatch(action);
1363 }
1364
1365
1366 void dispatch(FuncRequest const & action, DispatchResult & dr)
1367 {
1368         LAPPERR(theApp());
1369         return theApp()->dispatch(action, dr);
1370 }
1371
1372
1373 vector<string> & theFilesToLoad()
1374 {
1375         LAPPERR(singleton_);
1376         return singleton_->pimpl_->files_to_load_;
1377 }
1378
1379
1380 BufferList & theBufferList()
1381 {
1382         LAPPERR(singleton_);
1383         return singleton_->pimpl_->buffer_list_;
1384 }
1385
1386
1387 Server & theServer()
1388 {
1389         // FIXME: this should not be use_gui dependent
1390         LWARNIF(use_gui);
1391         LAPPERR(singleton_);
1392         return *singleton_->pimpl_->lyx_server_.get();
1393 }
1394
1395
1396 ServerSocket & theServerSocket()
1397 {
1398         // FIXME: this should not be use_gui dependent
1399         LWARNIF(use_gui);
1400         LAPPERR(singleton_);
1401         return *singleton_->pimpl_->lyx_socket_.get();
1402 }
1403
1404
1405 KeyMap & theTopLevelKeymap()
1406 {
1407         LAPPERR(singleton_);
1408         return singleton_->pimpl_->toplevel_keymap_;
1409 }
1410
1411
1412 Converters & theConverters()
1413 {
1414         LAPPERR(singleton_);
1415         return  singleton_->pimpl_->converters_;
1416 }
1417
1418
1419 Converters & theSystemConverters()
1420 {
1421         LAPPERR(singleton_);
1422         return  singleton_->pimpl_->system_converters_;
1423 }
1424
1425
1426 Movers & theMovers()
1427 {
1428         LAPPERR(singleton_);
1429         return singleton_->pimpl_->movers_;
1430 }
1431
1432
1433 Mover const & getMover(string  const & fmt)
1434 {
1435         LAPPERR(singleton_);
1436         return singleton_->pimpl_->movers_(fmt);
1437 }
1438
1439
1440 void setMover(string const & fmt, string const & command)
1441 {
1442         LAPPERR(singleton_);
1443         singleton_->pimpl_->movers_.set(fmt, command);
1444 }
1445
1446
1447 Movers & theSystemMovers()
1448 {
1449         LAPPERR(singleton_);
1450         return singleton_->pimpl_->system_movers_;
1451 }
1452
1453
1454 Messages const & getMessages(string const & language)
1455 {
1456         LAPPERR(singleton_);
1457         return singleton_->messages(language);
1458 }
1459
1460
1461 Messages const & getGuiMessages()
1462 {
1463         LAPPERR(singleton_);
1464         return singleton_->messages(Messages::guiLanguage());
1465 }
1466
1467
1468 Session & theSession()
1469 {
1470         LAPPERR(singleton_);
1471         return *singleton_->pimpl_->session_.get();
1472 }
1473
1474
1475 LaTeXFonts & theLaTeXFonts()
1476 {
1477         LAPPERR(singleton_);
1478         if (!singleton_->pimpl_->latexfonts_)
1479                 singleton_->pimpl_->latexfonts_ = new LaTeXFonts;
1480         return *singleton_->pimpl_->latexfonts_;
1481 }
1482
1483
1484 CmdDef & theTopLevelCmdDef()
1485 {
1486         LAPPERR(singleton_);
1487         return singleton_->pimpl_->toplevel_cmddef_;
1488 }
1489
1490
1491 SpellChecker * theSpellChecker()
1492 {
1493         if (!singleton_->pimpl_->spell_checker_)
1494                 setSpellChecker();
1495         return singleton_->pimpl_->spell_checker_;
1496 }
1497
1498
1499 void setSpellChecker()
1500 {
1501         SpellChecker::ChangeNumber speller_change_number =singleton_->pimpl_->spell_checker_ ?
1502                 singleton_->pimpl_->spell_checker_->changeNumber() : 0;
1503
1504         if (lyxrc.spellchecker == "native") {
1505 #if defined(USE_MACOSX_PACKAGING)
1506                 if (!singleton_->pimpl_->apple_spell_checker_)
1507                         singleton_->pimpl_->apple_spell_checker_ = new AppleSpellChecker;
1508                 singleton_->pimpl_->spell_checker_ = singleton_->pimpl_->apple_spell_checker_;
1509 #else
1510                 singleton_->pimpl_->spell_checker_ = 0;
1511 #endif
1512         } else if (lyxrc.spellchecker == "aspell") {
1513 #if defined(USE_ASPELL)
1514                 if (!singleton_->pimpl_->aspell_checker_)
1515                         singleton_->pimpl_->aspell_checker_ = new AspellChecker;
1516                 singleton_->pimpl_->spell_checker_ = singleton_->pimpl_->aspell_checker_;
1517 #else
1518                 singleton_->pimpl_->spell_checker_ = 0;
1519 #endif
1520         } else if (lyxrc.spellchecker == "enchant") {
1521 #if defined(USE_ENCHANT)
1522                 if (!singleton_->pimpl_->enchant_checker_)
1523                         singleton_->pimpl_->enchant_checker_ = new EnchantChecker;
1524                 singleton_->pimpl_->spell_checker_ = singleton_->pimpl_->enchant_checker_;
1525 #else
1526                 singleton_->pimpl_->spell_checker_ = 0;
1527 #endif
1528         } else if (lyxrc.spellchecker == "hunspell") {
1529 #if defined(USE_HUNSPELL)
1530                 if (!singleton_->pimpl_->hunspell_checker_)
1531                         singleton_->pimpl_->hunspell_checker_ = new HunspellChecker;
1532                 singleton_->pimpl_->spell_checker_ = singleton_->pimpl_->hunspell_checker_;
1533 #else
1534                 singleton_->pimpl_->spell_checker_ = 0;
1535 #endif
1536         } else {
1537                 singleton_->pimpl_->spell_checker_ = 0;
1538         }
1539         if (singleton_->pimpl_->spell_checker_) {
1540                 singleton_->pimpl_->spell_checker_->changeNumber(speller_change_number);
1541                 singleton_->pimpl_->spell_checker_->advanceChangeNumber();
1542         }
1543 }
1544
1545 } // namespace lyx