src/common/appbase.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/appbase.cpp
   3 // Purpose:     implements wxAppConsoleBase class
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     19.06.2003 (extracted from common/appcmn.cpp)
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2003 Vadim Zeitlin <vadim@wxwindows.org>
   9 // License:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // for compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #ifdef __WXMSW__
  29         #include  "wx/msw/wrapwin.h"  // includes windows.h for MessageBox()
  30     #endif
  31     #include "wx/list.h"
  32     #include "wx/app.h"
  33     #include "wx/intl.h"
  34     #include "wx/log.h"
  35     #include "wx/utils.h"
  36     #include "wx/wxcrtvararg.h"
  37 #endif //WX_PRECOMP
  38
  39 #include "wx/apptrait.h"
  40 #include "wx/cmdline.h"
  41 #include "wx/confbase.h"
  42 #include "wx/evtloop.h"
  43 #include "wx/filename.h"
  44 #include "wx/msgout.h"
  45 #include "wx/ptr_scpd.h"
  46 #include "wx/tokenzr.h"
  47
  48 #if wxUSE_EXCEPTIONS && wxUSE_STL
  49     #include <exception>
  50     #include <typeinfo>
  51 #endif
  52
  53 #if !defined(__WXMSW__) || defined(__WXMICROWIN__)
  54   #include  <signal.h>      // for SIGTRAP used by wxTrap()
  55 #endif  //Win/Unix
  56
  57 #include <locale.h>
  58
  59 #if wxUSE_FONTMAP
  60     #include "wx/fontmap.h"
  61 #endif // wxUSE_FONTMAP
  62
  63 #if defined(__DARWIN__) && defined(_MSL_USING_MW_C_HEADERS) && _MSL_USING_MW_C_HEADERS
  64     // For MacTypes.h for Debugger function
  65     #include <CoreFoundation/CFBase.h>
  66 #endif
  67
  68 #if defined(__WXMAC__)
  69     #ifdef __DARWIN__
  70         #include  <CoreServices/CoreServices.h>
  71     #else
  72         #include  "wx/mac/private.h"  // includes mac headers
  73     #endif
  74 #endif // __WXMAC__
  75
  76 #ifdef __WXDEBUG__
  77     #if wxUSE_STACKWALKER
  78         #include "wx/stackwalk.h"
  79         #ifdef __WXMSW__
  80             #include "wx/msw/debughlp.h"
  81         #endif
  82     #endif // wxUSE_STACKWALKER
  83 #endif // __WXDEBUG__
  84
  85 // wxABI_VERSION can be defined when compiling applications but it should be
  86 // left undefined when compiling the library itself, it is then set to its
  87 // default value in version.h
  88 #if wxABI_VERSION != wxMAJOR_VERSION * 10000 + wxMINOR_VERSION * 100 + 99
  89 #error "wxABI_VERSION should not be defined when compiling the library"
  90 #endif
  91
  92 // ----------------------------------------------------------------------------
  93 // private functions prototypes
  94 // ----------------------------------------------------------------------------
  95
  96 #ifdef __WXDEBUG__
  97     // really just show the assert dialog
  98     static bool DoShowAssertDialog(const wxString& msg);
  99
 100     // prepare for showing the assert dialog, use the given traits or
 101     // DoShowAssertDialog() as last fallback to really show it
 102     static
 103     void ShowAssertDialog(const wxString& szFile,
 104                           int nLine,
 105                           const wxString& szFunc,
 106                           const wxString& szCond,
 107                           const wxString& szMsg,
 108                           wxAppTraits *traits = NULL);
 109
 110     // turn on the trace masks specified in the env variable WXTRACE
 111     static void LINKAGEMODE SetTraceMasks();
 112 #endif // __WXDEBUG__
 113
 114 // ----------------------------------------------------------------------------
 115 // global vars
 116 // ----------------------------------------------------------------------------
 117
 118 wxAppConsole *wxAppConsoleBase::ms_appInstance = NULL;
 119
 120 wxAppInitializerFunction wxAppConsoleBase::ms_appInitFn = NULL;
 121
 122 // ----------------------------------------------------------------------------
 123 // wxEventLoopPtr
 124 // ----------------------------------------------------------------------------
 125
 126 // this defines wxEventLoopPtr
 127 wxDEFINE_TIED_SCOPED_PTR_TYPE(wxEventLoopBase)
 128
 129 // ============================================================================
 130 // wxAppConsoleBase implementation
 131 // ============================================================================
 132
 133 // ----------------------------------------------------------------------------
 134 // ctor/dtor
 135 // ----------------------------------------------------------------------------
 136
 137 wxAppConsoleBase::wxAppConsoleBase()
 138 {
 139     m_traits = NULL;
 140     m_mainLoop = NULL;
 141
 142     ms_appInstance = wx_static_cast(wxAppConsole *, this);
 143
 144 #ifdef __WXDEBUG__
 145     SetTraceMasks();
 146 #if wxUSE_UNICODE
 147     // In unicode mode the SetTraceMasks call can cause an apptraits to be
 148     // created, but since we are still in the constructor the wrong kind will
 149     // be created for GUI apps.  Destroy it so it can be created again later.
 150     delete m_traits;
 151     m_traits = NULL;
 152 #endif
 153 #endif
 154 }
 155
 156 wxAppConsoleBase::~wxAppConsoleBase()
 157 {
 158     delete m_traits;
 159 }
 160
 161 // ----------------------------------------------------------------------------
 162 // initilization/cleanup
 163 // ----------------------------------------------------------------------------
 164
 165 bool wxAppConsoleBase::Initialize(int& argcOrig, wxChar **argvOrig)
 166 {
 167 #if wxUSE_INTL
 168     GetTraits()->SetLocale();
 169 #endif // wxUSE_INTL
 170
 171     // remember the command line arguments
 172     argc = argcOrig;
 173     argv = argvOrig;
 174
 175 #if wxUSE_THREADS
 176     wxPendingEventsLocker = new wxCriticalSection;
 177 #endif
 178
 179 #ifndef __WXPALMOS__
 180     if ( m_appName.empty() && argv )
 181     {
 182         // the application name is, by default, the name of its executable file
 183         wxFileName::SplitPath(argv[0], NULL, &m_appName, NULL);
 184     }
 185 #endif // !__WXPALMOS__
 186
 187     return true;
 188 }
 189
 190 wxEventLoopBase *wxAppConsoleBase::CreateMainLoop()
 191 {
 192     return GetTraits()->CreateEventLoop();
 193 }
 194
 195 void wxAppConsoleBase::CleanUp()
 196 {
 197     if ( m_mainLoop )
 198     {
 199         delete m_mainLoop;
 200         m_mainLoop = NULL;
 201     }
 202
 203     delete wxPendingEvents;
 204     wxPendingEvents = NULL;
 205
 206 #if wxUSE_THREADS
 207     delete wxPendingEventsLocker;
 208     wxPendingEventsLocker = NULL;
 209 #endif // wxUSE_THREADS
 210 }
 211
 212 // ----------------------------------------------------------------------------
 213 // OnXXX() callbacks
 214 // ----------------------------------------------------------------------------
 215
 216 bool wxAppConsoleBase::OnInit()
 217 {
 218 #if wxUSE_CMDLINE_PARSER
 219     wxCmdLineParser parser(argc, argv);
 220
 221     OnInitCmdLine(parser);
 222
 223     bool cont;
 224     switch ( parser.Parse(false /* don't show usage */) )
 225     {
 226         case -1:
 227             cont = OnCmdLineHelp(parser);
 228             break;
 229
 230         case 0:
 231             cont = OnCmdLineParsed(parser);
 232             break;
 233
 234         default:
 235             cont = OnCmdLineError(parser);
 236             break;
 237     }
 238
 239     if ( !cont )
 240         return false;
 241 #endif // wxUSE_CMDLINE_PARSER
 242
 243     return true;
 244 }
 245
 246 int wxAppConsoleBase::OnRun()
 247 {
 248     return MainLoop();
 249 }
 250
 251 int wxAppConsoleBase::OnExit()
 252 {
 253 #if wxUSE_CONFIG
 254     // delete the config object if any (don't use Get() here, but Set()
 255     // because Get() could create a new config object)
 256     delete wxConfigBase::Set((wxConfigBase *) NULL);
 257 #endif // wxUSE_CONFIG
 258
 259     return 0;
 260 }
 261
 262 void wxAppConsoleBase::Exit()
 263 {
 264     if (m_mainLoop != NULL)
 265         ExitMainLoop();
 266     else
 267         exit(-1);
 268 }
 269
 270 // ----------------------------------------------------------------------------
 271 // traits stuff
 272 // ----------------------------------------------------------------------------
 273
 274 wxAppTraits *wxAppConsoleBase::CreateTraits()
 275 {
 276     return new wxConsoleAppTraits;
 277 }
 278
 279 wxAppTraits *wxAppConsoleBase::GetTraits()
 280 {
 281     // FIXME-MT: protect this with a CS?
 282     if ( !m_traits )
 283     {
 284         m_traits = CreateTraits();
 285
 286         wxASSERT_MSG( m_traits, _T("wxApp::CreateTraits() failed?") );
 287     }
 288
 289     return m_traits;
 290 }
 291
 292 // ----------------------------------------------------------------------------
 293 // event processing
 294 // ----------------------------------------------------------------------------
 295
 296 int wxAppConsoleBase::MainLoop()
 297 {
 298     wxEventLoopBaseTiedPtr mainLoop(&m_mainLoop, CreateMainLoop());
 299
 300     return m_mainLoop ? m_mainLoop->Run() : -1;
 301 }
 302
 303 void wxAppConsoleBase::ExitMainLoop()
 304 {
 305     // we should exit from the main event loop, not just any currently active
 306     // (e.g. modal dialog) event loop
 307     if ( m_mainLoop && m_mainLoop->IsRunning() )
 308     {
 309         m_mainLoop->Exit(0);
 310     }
 311 }
 312
 313 bool wxAppConsoleBase::Pending()
 314 {
 315     // use the currently active message loop here, not m_mainLoop, because if
 316     // we're showing a modal dialog (with its own event loop) currently the
 317     // main event loop is not running anyhow
 318     wxEventLoopBase * const loop = wxEventLoopBase::GetActive();
 319
 320     return loop && loop->Pending();
 321 }
 322
 323 bool wxAppConsoleBase::Dispatch()
 324 {
 325     // see comment in Pending()
 326     wxEventLoopBase * const loop = wxEventLoopBase::GetActive();
 327
 328     return loop && loop->Dispatch();
 329 }
 330
 331 bool wxAppConsoleBase::HasPendingEvents() const
 332 {
 333     wxENTER_CRIT_SECT( *wxPendingEventsLocker );
 334
 335     bool has = wxPendingEvents && !wxPendingEvents->IsEmpty();
 336
 337     wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
 338
 339     return has;
 340 }
 341
 342 /* static */
 343 bool wxAppConsoleBase::IsMainLoopRunning()
 344 {
 345     const wxAppConsole * const app = GetInstance();
 346
 347     return app && app->m_mainLoop != NULL;
 348 }
 349
 350 void wxAppConsoleBase::ProcessPendingEvents()
 351 {
 352 #if wxUSE_THREADS
 353     if ( !wxPendingEventsLocker )
 354         return;
 355 #endif
 356
 357     wxENTER_CRIT_SECT( *wxPendingEventsLocker );
 358
 359     if (wxPendingEvents)
 360     {
 361         // iterate until the list becomes empty
 362         wxList::compatibility_iterator node = wxPendingEvents->GetFirst();
 363         while (node)
 364         {
 365             wxEvtHandler *handler = (wxEvtHandler *)node->GetData();
 366             wxPendingEvents->Erase(node);
 367
 368             // In ProcessPendingEvents(), new handlers might be add
 369             // and we can safely leave the critical section here.
 370             wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
 371
 372             handler->ProcessPendingEvents();
 373
 374             wxENTER_CRIT_SECT( *wxPendingEventsLocker );
 375
 376             node = wxPendingEvents->GetFirst();
 377         }
 378     }
 379
 380     wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
 381 }
 382
 383 void wxAppConsoleBase::WakeUpIdle()
 384 {
 385     if ( m_mainLoop )
 386         m_mainLoop->WakeUp();
 387 }
 388
 389 bool wxAppConsoleBase::ProcessIdle()
 390 {
 391     wxIdleEvent event;
 392
 393     event.SetEventObject(this);
 394     ProcessEvent(event);
 395     return event.MoreRequested();
 396 }
 397
 398 int wxAppConsoleBase::FilterEvent(wxEvent& WXUNUSED(event))
 399 {
 400     // process the events normally by default
 401     return -1;
 402 }
 403
 404 // ----------------------------------------------------------------------------
 405 // exception handling
 406 // ----------------------------------------------------------------------------
 407
 408 #if wxUSE_EXCEPTIONS
 409
 410 void
 411 wxAppConsoleBase::HandleEvent(wxEvtHandler *handler,
 412                               wxEventFunction func,
 413                               wxEvent& event) const
 414 {
 415     // by default, simply call the handler
 416     (handler->*func)(event);
 417 }
 418
 419 void wxAppConsoleBase::OnUnhandledException()
 420 {
 421 #ifdef __WXDEBUG__
 422     // we're called from an exception handler so we can re-throw the exception
 423     // to recover its type
 424     wxString what;
 425     try
 426     {
 427         throw;
 428     }
 429 #if wxUSE_STL
 430     catch ( std::exception& e )
 431     {
 432         what.Printf("std::exception of type \"%s\", what() = \"%s\"",
 433                     typeid(e).name(), e.what());
 434     }
 435 #endif // wxUSE_STL
 436     catch ( ... )
 437     {
 438         what = "unknown exception";
 439     }
 440
 441     wxMessageOutputBest().Printf(
 442         "*** Caught unhandled %s; terminating\n", what
 443     );
 444 #endif // __WXDEBUG__
 445 }
 446
 447 // ----------------------------------------------------------------------------
 448 // exceptions support
 449 // ----------------------------------------------------------------------------
 450
 451 bool wxAppConsoleBase::OnExceptionInMainLoop()
 452 {
 453     throw;
 454
 455     // some compilers are too stupid to know that we never return after throw
 456 #if defined(__DMC__) || (defined(_MSC_VER) && _MSC_VER < 1200)
 457     return false;
 458 #endif
 459 }
 460
 461 #endif // wxUSE_EXCEPTIONS
 462
 463 // ----------------------------------------------------------------------------
 464 // cmd line parsing
 465 // ----------------------------------------------------------------------------
 466
 467 #if wxUSE_CMDLINE_PARSER
 468
 469 #define OPTION_VERBOSE _T("verbose")
 470
 471 void wxAppConsoleBase::OnInitCmdLine(wxCmdLineParser& parser)
 472 {
 473     // the standard command line options
 474     static const wxCmdLineEntryDesc cmdLineDesc[] =
 475     {
 476         {
 477             wxCMD_LINE_SWITCH,
 478             _T("h"),
 479             _T("help"),
 480             gettext_noop("show this help message"),
 481             wxCMD_LINE_VAL_NONE,
 482             wxCMD_LINE_OPTION_HELP
 483         },
 484
 485 #if wxUSE_LOG
 486         {
 487             wxCMD_LINE_SWITCH,
 488             wxEmptyString,
 489             OPTION_VERBOSE,
 490             gettext_noop("generate verbose log messages"),
 491             wxCMD_LINE_VAL_NONE,
 492             0x0
 493         },
 494 #endif // wxUSE_LOG
 495
 496         // terminator
 497         {
 498             wxCMD_LINE_NONE,
 499             wxEmptyString,
 500             wxEmptyString,
 501             wxEmptyString,
 502             wxCMD_LINE_VAL_NONE,
 503             0x0
 504         }
 505     };
 506
 507     parser.SetDesc(cmdLineDesc);
 508 }
 509
 510 bool wxAppConsoleBase::OnCmdLineParsed(wxCmdLineParser& parser)
 511 {
 512 #if wxUSE_LOG
 513     if ( parser.Found(OPTION_VERBOSE) )
 514     {
 515         wxLog::SetVerbose(true);
 516     }
 517 #else
 518     wxUnusedVar(parser);
 519 #endif // wxUSE_LOG
 520
 521     return true;
 522 }
 523
 524 bool wxAppConsoleBase::OnCmdLineHelp(wxCmdLineParser& parser)
 525 {
 526     parser.Usage();
 527
 528     return false;
 529 }
 530
 531 bool wxAppConsoleBase::OnCmdLineError(wxCmdLineParser& parser)
 532 {
 533     parser.Usage();
 534
 535     return false;
 536 }
 537
 538 #endif // wxUSE_CMDLINE_PARSER
 539
 540 // ----------------------------------------------------------------------------
 541 // debugging support
 542 // ----------------------------------------------------------------------------
 543
 544 /* static */
 545 bool wxAppConsoleBase::CheckBuildOptions(const char *optionsSignature,
 546                                          const char *componentName)
 547 {
 548 #if 0 // can't use wxLogTrace, not up and running yet
 549     printf("checking build options object '%s' (ptr %p) in '%s'\n",
 550              optionsSignature, optionsSignature, componentName);
 551 #endif
 552
 553     if ( strcmp(optionsSignature, WX_BUILD_OPTIONS_SIGNATURE) != 0 )
 554     {
 555         wxString lib = wxString::FromAscii(WX_BUILD_OPTIONS_SIGNATURE);
 556         wxString prog = wxString::FromAscii(optionsSignature);
 557         wxString progName = wxString::FromAscii(componentName);
 558         wxString msg;
 559
 560         msg.Printf(_T("Mismatch between the program and library build versions detected.\nThe library used %s,\nand %s used %s."),
 561                    lib.c_str(), progName.c_str(), prog.c_str());
 562
 563         wxLogFatalError(msg.c_str());
 564
 565         // normally wxLogFatalError doesn't return
 566         return false;
 567     }
 568 #undef wxCMP
 569
 570     return true;
 571 }
 572
 573 #ifdef __WXDEBUG__
 574
 575 void wxAppConsoleBase::OnAssertFailure(const wxChar *file,
 576                                        int line,
 577                                        const wxChar *func,
 578                                        const wxChar *cond,
 579                                        const wxChar *msg)
 580 {
 581     ShowAssertDialog(file, line, func, cond, msg, GetTraits());
 582 }
 583
 584 void wxAppConsoleBase::OnAssert(const wxChar *file,
 585                                 int line,
 586                                 const wxChar *cond,
 587                                 const wxChar *msg)
 588 {
 589     OnAssertFailure(file, line, NULL, cond, msg);
 590 }
 591
 592 #endif // __WXDEBUG__
 593
 594 // ============================================================================
 595 // other classes implementations
 596 // ============================================================================
 597
 598 // ----------------------------------------------------------------------------
 599 // wxConsoleAppTraitsBase
 600 // ----------------------------------------------------------------------------
 601
 602 #if wxUSE_LOG
 603
 604 wxLog *wxConsoleAppTraitsBase::CreateLogTarget()
 605 {
 606     return new wxLogStderr;
 607 }
 608
 609 #endif // wxUSE_LOG
 610
 611 wxMessageOutput *wxConsoleAppTraitsBase::CreateMessageOutput()
 612 {
 613     return new wxMessageOutputStderr;
 614 }
 615
 616 #if wxUSE_FONTMAP
 617
 618 wxFontMapper *wxConsoleAppTraitsBase::CreateFontMapper()
 619 {
 620     return (wxFontMapper *)new wxFontMapperBase;
 621 }
 622
 623 #endif // wxUSE_FONTMAP
 624
 625 wxRendererNative *wxConsoleAppTraitsBase::CreateRenderer()
 626 {
 627     // console applications don't use renderers
 628     return NULL;
 629 }
 630
 631 #ifdef __WXDEBUG__
 632 bool wxConsoleAppTraitsBase::ShowAssertDialog(const wxString& msg)
 633 {
 634     return wxAppTraitsBase::ShowAssertDialog(msg);
 635 }
 636 #endif
 637
 638 bool wxConsoleAppTraitsBase::HasStderr()
 639 {
 640     // console applications always have stderr, even under Mac/Windows
 641     return true;
 642 }
 643
 644 void wxConsoleAppTraitsBase::ScheduleForDestroy(wxObject *object)
 645 {
 646     delete object;
 647 }
 648
 649 void wxConsoleAppTraitsBase::RemoveFromPendingDelete(wxObject * WXUNUSED(object))
 650 {
 651     // nothing to do
 652 }
 653
 654 #if wxUSE_SOCKETS
 655 GSocketGUIFunctionsTable* wxConsoleAppTraitsBase::GetSocketGUIFunctionsTable()
 656 {
 657     return NULL;
 658 }
 659 #endif
 660
 661 // ----------------------------------------------------------------------------
 662 // wxAppTraits
 663 // ----------------------------------------------------------------------------
 664
 665 #if wxUSE_INTL
 666 void wxAppTraitsBase::SetLocale()
 667 {
 668     wxSetlocale(LC_ALL, "");
 669     wxUpdateLocaleIsUtf8();
 670 }
 671 #endif
 672
 673 #ifdef __WXDEBUG__
 674
 675 bool wxAppTraitsBase::ShowAssertDialog(const wxString& msgOriginal)
 676 {
 677     wxString msg = msgOriginal;
 678
 679 #if wxUSE_STACKWALKER
 680 #if !defined(__WXMSW__)
 681     // on Unix stack frame generation may take some time, depending on the
 682     // size of the executable mainly... warn the user that we are working
 683     wxFprintf(stderr, wxT("[Debug] Generating a stack trace... please wait"));
 684     fflush(stderr);
 685 #endif
 686
 687     const wxString stackTrace = GetAssertStackTrace();
 688     if ( !stackTrace.empty() )
 689         msg << _T("\n\nCall stack:\n") << stackTrace;
 690 #endif // wxUSE_STACKWALKER
 691
 692     return DoShowAssertDialog(msg);
 693 }
 694
 695 #if wxUSE_STACKWALKER
 696 wxString wxAppTraitsBase::GetAssertStackTrace()
 697 {
 698     wxString stackTrace;
 699
 700     class StackDump : public wxStackWalker
 701     {
 702     public:
 703         StackDump() { }
 704
 705         const wxString& GetStackTrace() const { return m_stackTrace; }
 706
 707     protected:
 708         virtual void OnStackFrame(const wxStackFrame& frame)
 709         {
 710             m_stackTrace << wxString::Format
 711                             (
 712                               _T("[%02d] "),
 713                               wx_truncate_cast(int, frame.GetLevel())
 714                             );
 715
 716             wxString name = frame.GetName();
 717             if ( !name.empty() )
 718             {
 719                 m_stackTrace << wxString::Format(_T("%-40s"), name.c_str());
 720             }
 721             else
 722             {
 723                 m_stackTrace << wxString::Format(_T("%p"), frame.GetAddress());
 724             }
 725
 726             if ( frame.HasSourceLocation() )
 727             {
 728                 m_stackTrace << _T('\t')
 729                              << frame.GetFileName()
 730                              << _T(':')
 731                              << frame.GetLine();
 732             }
 733
 734             m_stackTrace << _T('\n');
 735         }
 736
 737     private:
 738         wxString m_stackTrace;
 739     };
 740
 741     // don't show more than maxLines or we could get a dialog too tall to be
 742     // shown on screen: 20 should be ok everywhere as even with 15 pixel high
 743     // characters it is still only 300 pixels...
 744     static const int maxLines = 20;
 745
 746     StackDump dump;
 747     dump.Walk(2, maxLines); // don't show OnAssert() call itself
 748     stackTrace = dump.GetStackTrace();
 749
 750     const int count = stackTrace.Freq(wxT('\n'));
 751     for ( int i = 0; i < count - maxLines; i++ )
 752         stackTrace = stackTrace.BeforeLast(wxT('\n'));
 753
 754     return stackTrace;
 755 }
 756 #endif // wxUSE_STACKWALKER
 757
 758
 759 #endif // __WXDEBUG__
 760
 761 // ============================================================================
 762 // global functions implementation
 763 // ============================================================================
 764
 765 void wxExit()
 766 {
 767     if ( wxTheApp )
 768     {
 769         wxTheApp->Exit();
 770     }
 771     else
 772     {
 773         // what else can we do?
 774         exit(-1);
 775     }
 776 }
 777
 778 void wxWakeUpIdle()
 779 {
 780     if ( wxTheApp )
 781     {
 782         wxTheApp->WakeUpIdle();
 783     }
 784     //else: do nothing, what can we do?
 785 }
 786
 787 #ifdef  __WXDEBUG__
 788
 789 // wxASSERT() helper
 790 bool wxAssertIsEqual(int x, int y)
 791 {
 792     return x == y;
 793 }
 794
 795 // break into the debugger
 796 void wxTrap()
 797 {
 798 #if defined(__WXMSW__) && !defined(__WXMICROWIN__)
 799     DebugBreak();
 800 #elif defined(__WXMAC__) && !defined(__DARWIN__)
 801     #if __powerc
 802         Debugger();
 803     #else
 804         SysBreak();
 805     #endif
 806 #elif defined(_MSL_USING_MW_C_HEADERS) && _MSL_USING_MW_C_HEADERS
 807     Debugger();
 808 #elif defined(__UNIX__)
 809     raise(SIGTRAP);
 810 #else
 811     // TODO
 812 #endif // Win/Unix
 813 }
 814
 815 // this function is called when an assert fails
 816 static void wxDoOnAssert(const wxString& szFile,
 817                          int nLine,
 818                          const wxString& szFunc,
 819                          const wxString& szCond,
 820                          const wxString& szMsg = wxEmptyString)
 821 {
 822     // FIXME MT-unsafe
 823     static bool s_bInAssert = false;
 824
 825     if ( s_bInAssert )
 826     {
 827         // He-e-e-e-elp!! we're trapped in endless loop
 828         wxTrap();
 829
 830         s_bInAssert = false;
 831
 832         return;
 833     }
 834
 835     s_bInAssert = true;
 836
 837     if ( !wxTheApp )
 838     {
 839         // by default, show the assert dialog box -- we can't customize this
 840         // behaviour
 841         ShowAssertDialog(szFile, nLine, szFunc, szCond, szMsg);
 842     }
 843     else
 844     {
 845         // let the app process it as it wants
 846         // FIXME-UTF8: use wc_str(), not c_str(), when ANSI build is removed
 847         wxTheApp->OnAssertFailure(szFile.c_str(), nLine, szFunc.c_str(),
 848                                   szCond.c_str(), szMsg.c_str());
 849     }
 850
 851     s_bInAssert = false;
 852 }
 853
 854 void wxOnAssert(const wxString& szFile,
 855                 int nLine,
 856                 const wxString& szFunc,
 857                 const wxString& szCond,
 858                 const wxString& szMsg)
 859 {
 860     wxDoOnAssert(szFile, nLine, szFunc, szCond, szMsg);
 861 }
 862
 863 void wxOnAssert(const wxString& szFile,
 864                 int nLine,
 865                 const wxString& szFunc,
 866                 const wxString& szCond)
 867 {
 868     wxDoOnAssert(szFile, nLine, szFunc, szCond);
 869 }
 870
 871 void wxOnAssert(const wxChar *szFile,
 872                 int nLine,
 873                 const char *szFunc,
 874                 const wxChar *szCond,
 875                 const wxChar *szMsg)
 876 {
 877     wxDoOnAssert(szFile, nLine, szFunc, szCond, szMsg);
 878 }
 879
 880 void wxOnAssert(const char *szFile,
 881                 int nLine,
 882                 const char *szFunc,
 883                 const char *szCond,
 884                 const wxString& szMsg)
 885 {
 886     wxDoOnAssert(szFile, nLine, szFunc, szCond, szMsg);
 887 }
 888
 889 void wxOnAssert(const char *szFile,
 890                 int nLine,
 891                 const char *szFunc,
 892                 const char *szCond,
 893                 const wxCStrData& msg)
 894 {
 895     wxDoOnAssert(szFile, nLine, szFunc, szCond, msg);
 896 }
 897
 898 #if wxUSE_UNICODE
 899 void wxOnAssert(const char *szFile,
 900                 int nLine,
 901                 const char *szFunc,
 902                 const char *szCond)
 903 {
 904     wxDoOnAssert(szFile, nLine, szFunc, szCond);
 905 }
 906
 907 void wxOnAssert(const char *szFile,
 908                 int nLine,
 909                 const char *szFunc,
 910                 const char *szCond,
 911                 const char *szMsg)
 912 {
 913     wxDoOnAssert(szFile, nLine, szFunc, szCond, szMsg);
 914 }
 915
 916 void wxOnAssert(const char *szFile,
 917                 int nLine,
 918                 const char *szFunc,
 919                 const char *szCond,
 920                 const wxChar *szMsg)
 921 {
 922     wxDoOnAssert(szFile, nLine, szFunc, szCond, szMsg);
 923 }
 924 #endif // wxUSE_UNICODE
 925
 926 #endif // __WXDEBUG__
 927
 928 // ============================================================================
 929 // private functions implementation
 930 // ============================================================================
 931
 932 #ifdef __WXDEBUG__
 933
 934 static void LINKAGEMODE SetTraceMasks()
 935 {
 936 #if wxUSE_LOG
 937     wxString mask;
 938     if ( wxGetEnv(wxT("WXTRACE"), &mask) )
 939     {
 940         wxStringTokenizer tkn(mask, wxT(",;:"));
 941         while ( tkn.HasMoreTokens() )
 942             wxLog::AddTraceMask(tkn.GetNextToken());
 943     }
 944 #endif // wxUSE_LOG
 945 }
 946
 947 static
 948 bool DoShowAssertDialog(const wxString& msg)
 949 {
 950     // under MSW we can show the dialog even in the console mode
 951 #if defined(__WXMSW__) && !defined(__WXMICROWIN__)
 952     wxString msgDlg(msg);
 953
 954     // this message is intentionally not translated -- it is for
 955     // developpers only
 956     msgDlg += wxT("\nDo you want to stop the program?\n")
 957               wxT("You can also choose [Cancel] to suppress ")
 958               wxT("further warnings.");
 959
 960     switch ( ::MessageBox(NULL, msgDlg.wx_str(), _T("wxWidgets Debug Alert"),
 961                           MB_YESNOCANCEL | MB_ICONSTOP ) )
 962     {
 963         case IDYES:
 964             wxTrap();
 965             break;
 966
 967         case IDCANCEL:
 968             // stop the asserts
 969             return true;
 970
 971         //case IDNO: nothing to do
 972     }
 973 #else // !__WXMSW__
 974     wxFprintf(stderr, wxT("%s\n"), msg.c_str());
 975     fflush(stderr);
 976
 977     // TODO: ask the user to enter "Y" or "N" on the console?
 978     wxTrap();
 979 #endif // __WXMSW__/!__WXMSW__
 980
 981     // continue with the asserts
 982     return false;
 983 }
 984
 985 // show the assert modal dialog
 986 static
 987 void ShowAssertDialog(const wxString& szFile,
 988                       int nLine,
 989                       const wxString& szFunc,
 990                       const wxString& szCond,
 991                       const wxString& szMsg,
 992                       wxAppTraits *traits)
 993 {
 994     // this variable can be set to true to suppress "assert failure" messages
 995     static bool s_bNoAsserts = false;
 996
 997     wxString msg;
 998     msg.reserve(2048);
 999
1000     // make life easier for people using VC++ IDE by using this format: like
1001     // this, clicking on the message will take us immediately to the place of
1002     // the failed assert
1003     msg.Printf(wxT("%s(%d): assert \"%s\" failed"), szFile, nLine, szCond);
1004
1005     // add the function name, if any
1006     if ( !szFunc.empty() )
1007         msg << _T(" in ") << szFunc << _T("()");
1008
1009     // and the message itself
1010     if ( !szMsg.empty() )
1011     {
1012         msg << _T(": ") << szMsg;
1013     }
1014     else // no message given
1015     {
1016         msg << _T('.');
1017     }
1018
1019 #if wxUSE_THREADS
1020     // if we are not in the main thread, output the assert directly and trap
1021     // since dialogs cannot be displayed
1022     if ( !wxThread::IsMain() )
1023     {
1024         msg += wxT(" [in child thread]");
1025
1026 #if defined(__WXMSW__) && !defined(__WXMICROWIN__)
1027         msg << wxT("\r\n");
1028         OutputDebugString(msg.wx_str());
1029 #else
1030         // send to stderr
1031         wxFprintf(stderr, wxT("%s\n"), msg.c_str());
1032         fflush(stderr);
1033 #endif
1034         // He-e-e-e-elp!! we're asserting in a child thread
1035         wxTrap();
1036     }
1037     else
1038 #endif // wxUSE_THREADS
1039
1040     if ( !s_bNoAsserts )
1041     {
1042         // send it to the normal log destination
1043         wxLogDebug(_T("%s"), msg.c_str());
1044
1045         if ( traits )
1046         {
1047             // delegate showing assert dialog (if possible) to that class
1048             s_bNoAsserts = traits->ShowAssertDialog(msg);
1049         }
1050         else // no traits object
1051         {
1052             // fall back to the function of last resort
1053             s_bNoAsserts = DoShowAssertDialog(msg);
1054         }
1055     }
1056 }
1057
1058 #endif // __WXDEBUG__