src/common/init.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/init.cpp
   3 // Purpose:     initialisation for the library
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     04.10.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Vadim Zeitlin
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #include "wx/wxprec.h"
  21
  22 #ifdef    __BORLANDC__
  23   #pragma hdrstop
  24 #endif  //__BORLANDC__
  25
  26 #ifndef WX_PRECOMP
  27     #include "wx/app.h"
  28     #include "wx/debug.h"
  29     #include "wx/filefn.h"
  30 #endif
  31
  32 #include "wx/module.h"
  33
  34 // ----------------------------------------------------------------------------
  35 // global vars
  36 // ----------------------------------------------------------------------------
  37
  38 WXDLLEXPORT wxApp *wxTheApp = NULL;
  39
  40 wxAppInitializerFunction
  41     wxAppBase::m_appInitFn = (wxAppInitializerFunction)NULL;
  42
  43 // ----------------------------------------------------------------------------
  44 // private classes
  45 // ----------------------------------------------------------------------------
  46
  47 class /* no WXDLLEXPORT */ wxConsoleApp : public wxApp
  48 {
  49 public:
  50     virtual int OnRun() { wxFAIL_MSG(wxT("unreachable")); return 0; }
  51     virtual bool ProcessIdle() { return TRUE; }
  52 };
  53
  54 // ----------------------------------------------------------------------------
  55 // private functions
  56 // ----------------------------------------------------------------------------
  57
  58 static bool DoInit();
  59 static void DoCleanUp();
  60
  61 // ----------------------------------------------------------------------------
  62 // private vars
  63 // ----------------------------------------------------------------------------
  64
  65 static size_t gs_nInitCount = 0;
  66
  67 // ============================================================================
  68 // implementation
  69 // ============================================================================
  70
  71 // ----------------------------------------------------------------------------
  72 // stubs for some GUI functions
  73 // ----------------------------------------------------------------------------
  74
  75 void WXDLLEXPORT wxExit()
  76 {
  77     abort();
  78 }
  79
  80 // Yield to other apps/messages
  81 void WXDLLEXPORT wxWakeUpIdle()
  82 {
  83     // do nothing
  84 }
  85
  86 // ----------------------------------------------------------------------------
  87 // wxBase-specific functions
  88 // ----------------------------------------------------------------------------
  89
  90 bool WXDLLEXPORT wxInitialize()
  91 {
  92     if ( gs_nInitCount )
  93     {
  94         // already initialized
  95         return TRUE;
  96     }
  97
  98     wxASSERT_MSG( !wxTheApp,
  99                   wxT("either call wxInitialize or create app, not both!") );
 100
 101     if ( !DoInit() )
 102     {
 103         return FALSE;
 104     }
 105
 106     wxTheApp = new wxConsoleApp;
 107
 108     if ( !wxTheApp )
 109     {
 110         return FALSE;
 111     }
 112
 113     wxTheApp->DoInit();
 114     gs_nInitCount++;
 115
 116     return TRUE;
 117 }
 118
 119 void WXDLLEXPORT wxUninitialize()
 120 {
 121     if ( !--gs_nInitCount )
 122     {
 123         DoCleanUp();
 124     }
 125 }
 126
 127 int wxEntry(int argc, char **argv)
 128 {
 129     // library initialization
 130     if ( !DoInit() )
 131     {
 132         return -1;
 133     }
 134
 135     // create the app
 136     if ( !wxTheApp )
 137     {
 138         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 139                 wxT("No application object: use IMPLEMENT_APP macro.") );
 140
 141         wxAppInitializerFunction fnCreate = wxApp::GetInitializerFunction();
 142
 143         wxTheApp = (wxApp *)fnCreate();
 144     }
 145
 146     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 147
 148     // app preinitialization
 149     wxTheApp->argc = argc;
 150
 151 #if wxUSE_UNICODE
 152     wxTheApp->argv = new wxChar*[argc+1];
 153     int mb_argc = 0;
 154     while (mb_argc < argc)
 155     {
 156         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 157         mb_argc++;
 158     }
 159     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 160 #else
 161     wxTheApp->argv = argv;
 162 #endif
 163
 164     wxString name = wxFileNameFromPath(argv[0]);
 165     wxStripExtension(name);
 166     wxTheApp->SetAppName(name);
 167
 168     int retValue = 0;
 169
 170     // app initialization
 171     if ( !wxTheApp->OnInit() )
 172         retValue = -1;
 173
 174     // app execution
 175     if ( retValue == 0 )
 176     {
 177         retValue = wxTheApp->OnRun();
 178
 179         // app clean up
 180         wxTheApp->OnExit();
 181     }
 182
 183     // library clean up
 184     DoCleanUp();
 185
 186     return retValue;
 187 }
 188
 189 // ----------------------------------------------------------------------------
 190 // private functions
 191 // ----------------------------------------------------------------------------
 192
 193 static bool DoInit()
 194 {
 195     wxClassInfo::InitializeClasses();
 196
 197     wxModule::RegisterModules();
 198     if ( !wxModule::InitializeModules() )
 199     {
 200         return FALSE;
 201     }
 202
 203     return TRUE;
 204 }
 205
 206 static void DoCleanUp()
 207 {
 208 #if wxUSE_LOG
 209     // flush the logged messages if any
 210     wxLog *log = wxLog::GetActiveTarget();
 211     if (log != NULL && log->HasPendingMessages())
 212         log->Flush();
 213
 214     // continuing to use user defined log target is unsafe from now on because
 215     // some resources may be already unavailable, so replace it by something
 216     // more safe
 217     wxLog::DontCreateOnDemand();
 218     delete wxLog::SetActiveTarget(new wxLogStderr);
 219 #endif // wxUSE_LOG
 220
 221     wxModule::CleanUpModules();
 222
 223     wxClassInfo::CleanUpClasses();
 224
 225     // delete the application object
 226     delete wxTheApp;
 227     wxTheApp = (wxApp *)NULL;
 228
 229 #if wxUSE_LOG
 230     // and now delete the last logger as well
 231     delete wxLog::SetActiveTarget(NULL);
 232 #endif // wxUSE_LOG
 233 }