src/common/log.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        log.cpp
   3 // Purpose:     Assorted wxLogXXX functions, and wxLog (sink for logs)
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     29/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19 #ifdef __GNUG__
  20   #pragma implementation "log.h"
  21 #endif
  22
  23 // For compilers that support precompilation, includes "wx.h".
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27   #pragma hdrstop
  28 #endif
  29
  30 // wxWindows
  31 #ifndef WX_PRECOMP
  32   #include  <wx/app.h>
  33   #include  <wx/string.h>
  34   #include  <wx/intl.h>
  35   #include  <wx/menu.h>
  36   #include  <wx/frame.h>
  37
  38   #include  <wx/generic/msgdlgg.h>
  39   #include  <wx/filedlg.h>
  40   #include  <wx/textctrl.h>
  41 #endif //WX_PRECOMP
  42
  43 #include  <wx/file.h>
  44 #include  <wx/textfile.h>
  45 #include  <wx/utils.h>
  46 #include  <wx/log.h>
  47
  48 // other standard headers
  49 #include  <errno.h>
  50 #include  <stdlib.h>
  51 #include  <time.h>
  52
  53 #ifdef  __WXMSW__
  54   #include  <windows.h>
  55 #else   //Unix
  56   #include  <signal.h>
  57 #endif  //Win/Unix
  58
  59 // ----------------------------------------------------------------------------
  60 // non member functions
  61 // ----------------------------------------------------------------------------
  62
  63 // define this to enable wrapping of log messages
  64 //#define LOG_PRETTY_WRAP
  65
  66 #ifdef  LOG_PRETTY_WRAP
  67   static void wxLogWrap(FILE *f, const char *pszPrefix, const char *psz);
  68 #endif
  69
  70 // ----------------------------------------------------------------------------
  71 // global variables
  72 // ----------------------------------------------------------------------------
  73
  74 // we use a global variable to store the frame pointer for wxLogStatus - bad,
  75 // but it's he easiest way
  76 static wxFrame *gs_pFrame;
  77
  78 // ============================================================================
  79 // implementation
  80 // ============================================================================
  81
  82 // ----------------------------------------------------------------------------
  83 // implementation of Log functions
  84 //
  85 // NB: unfortunately we need all these distinct functions, we can't make them
  86 //     macros and not all compilers inline vararg functions.
  87 // ----------------------------------------------------------------------------
  88
  89 // log functions can't allocate memory (LogError("out of memory...") should
  90 // work!), so we use a static buffer for all log messages
  91 #define LOG_BUFFER_SIZE   (4096)
  92
  93 // static buffer for error messages (@@@ MT-unsafe)
  94 static char s_szBuf[LOG_BUFFER_SIZE];
  95
  96 // generic log function
  97 void wxLogGeneric(wxLogLevel level, const char *szFormat, ...)
  98 {
  99   if ( wxLog::GetActiveTarget() != NULL ) {
 100     va_list argptr;
 101     va_start(argptr, szFormat);
 102     vsprintf(s_szBuf, szFormat, argptr);
 103     va_end(argptr);
 104
 105     wxLog::OnLog(level, s_szBuf);
 106   }
 107 }
 108
 109 #define IMPLEMENT_LOG_FUNCTION(level)                             \
 110   void wxLog##level(const char *szFormat, ...)                    \
 111   {                                                               \
 112     if ( wxLog::GetActiveTarget() != NULL ) {                     \
 113       va_list argptr;                                             \
 114       va_start(argptr, szFormat);                                 \
 115       vsprintf(s_szBuf, szFormat, argptr);                        \
 116       va_end(argptr);                                             \
 117                                                                   \
 118       wxLog::OnLog(wxLOG_##level, s_szBuf);                       \
 119     }                                                             \
 120   }
 121
 122 IMPLEMENT_LOG_FUNCTION(FatalError)
 123 IMPLEMENT_LOG_FUNCTION(Error)
 124 IMPLEMENT_LOG_FUNCTION(Warning)
 125 IMPLEMENT_LOG_FUNCTION(Message)
 126 IMPLEMENT_LOG_FUNCTION(Info)
 127 IMPLEMENT_LOG_FUNCTION(Status)
 128
 129 // accepts an additional argument which tells to which frame the output should
 130 // be directed
 131 void wxLogStatus(wxFrame *pFrame, const char *szFormat, ...)
 132 {
 133   wxLog *pLog = wxLog::GetActiveTarget();
 134   if ( pLog != NULL ) {
 135     va_list argptr;
 136     va_start(argptr, szFormat);
 137     vsprintf(s_szBuf, szFormat, argptr);
 138     va_end(argptr);
 139
 140     wxASSERT( gs_pFrame == NULL ); // should be reset!
 141     gs_pFrame = pFrame;
 142     wxLog::OnLog(wxLOG_Status, s_szBuf);
 143     gs_pFrame = NULL;
 144   }
 145 }
 146
 147 // same as info, but only if 'verbose' mode is on
 148 void wxLogVerbose(const char *szFormat, ...)
 149 {
 150   wxLog *pLog = wxLog::GetActiveTarget();
 151   if ( pLog != NULL && pLog->GetVerbose() ) {
 152     va_list argptr;
 153     va_start(argptr, szFormat);
 154     vsprintf(s_szBuf, szFormat, argptr);
 155     va_end(argptr);
 156
 157     wxLog::OnLog(wxLOG_Info, s_szBuf);
 158   }
 159 }
 160
 161 // debug functions
 162 #ifdef __WXDEBUG__
 163 #define IMPLEMENT_LOG_DEBUG_FUNCTION(level)                       \
 164   void wxLog##level(const char *szFormat, ...)                    \
 165   {                                                               \
 166     if ( wxLog::GetActiveTarget() != NULL ) {                     \
 167       va_list argptr;                                             \
 168       va_start(argptr, szFormat);                                 \
 169       vsprintf(s_szBuf, szFormat, argptr);                        \
 170       va_end(argptr);                                             \
 171                                                                   \
 172       wxLog::OnLog(wxLOG_##level, s_szBuf);                       \
 173     }                                                             \
 174   }
 175
 176   void wxLogTrace(wxTraceMask mask, const char *szFormat, ...)
 177   {
 178     wxLog *pLog = wxLog::GetActiveTarget();
 179
 180     // we check that all of mask bits are set in the current mask, so
 181     // that wxLogTrace(wxTraceRefCount | wxTraceOle) will only do something
 182     // if both bits are set.
 183     if ( pLog != NULL && ((pLog->GetTraceMask() & mask) == mask) ) {
 184       va_list argptr;
 185       va_start(argptr, szFormat);
 186       vsprintf(s_szBuf, szFormat, argptr);
 187       va_end(argptr);
 188
 189       wxLog::OnLog(wxLOG_Trace, s_szBuf);
 190     }
 191   }
 192
 193 #else // release
 194   #define IMPLEMENT_LOG_DEBUG_FUNCTION(level)
 195 #endif
 196
 197 IMPLEMENT_LOG_DEBUG_FUNCTION(Debug)
 198 IMPLEMENT_LOG_DEBUG_FUNCTION(Trace)
 199
 200 // wxLogSysError: one uses the last error code, for other  you must give it
 201 // explicitly
 202
 203 // common part of both wxLogSysError
 204 void wxLogSysErrorHelper(long lErrCode)
 205 {
 206   char szErrMsg[LOG_BUFFER_SIZE / 2];
 207   sprintf(szErrMsg, _(" (error %ld: %s)"), lErrCode, wxSysErrorMsg(lErrCode));
 208   strncat(s_szBuf, szErrMsg, WXSIZEOF(s_szBuf) - strlen(s_szBuf));
 209
 210   wxLog::OnLog(wxLOG_Error, s_szBuf);
 211 }
 212
 213 void WXDLLEXPORT wxLogSysError(const char *szFormat, ...)
 214 {
 215   va_list argptr;
 216   va_start(argptr, szFormat);
 217   vsprintf(s_szBuf, szFormat, argptr);
 218   va_end(argptr);
 219
 220   wxLogSysErrorHelper(wxSysErrorCode());
 221 }
 222
 223 void WXDLLEXPORT wxLogSysError(long lErrCode, const char *szFormat, ...)
 224 {
 225   va_list argptr;
 226   va_start(argptr, szFormat);
 227   vsprintf(s_szBuf, szFormat, argptr);
 228   va_end(argptr);
 229
 230   wxLogSysErrorHelper(lErrCode);
 231 }
 232
 233 // ----------------------------------------------------------------------------
 234 // wxLog class implementation
 235 // ----------------------------------------------------------------------------
 236
 237 wxLog::wxLog()
 238 {
 239   m_bHasMessages = FALSE;
 240   m_bVerbose     = FALSE;
 241   m_szTimeFormat = "[%d/%b/%y %H:%M:%S] ";
 242 }
 243
 244 wxLog *wxLog::GetActiveTarget()
 245 {
 246   if ( ms_bAutoCreate && ms_pLogger == NULL ) {
 247     // prevent infinite recursion if someone calls wxLogXXX() from
 248     // wxApp::CreateLogTarget()
 249     static bool s_bInGetActiveTarget = FALSE;
 250     if ( !s_bInGetActiveTarget ) {
 251       s_bInGetActiveTarget = TRUE;
 252
 253       #ifdef  WX_TEST_MINIMAL
 254         ms_pLogger = new wxLogStderr;
 255       #else
 256         // ask the application to create a log target for us
 257         if ( wxTheApp != NULL )
 258           ms_pLogger = wxTheApp->CreateLogTarget();
 259       #endif
 260
 261       // do nothing if it fails - what can we do?
 262     }
 263   }
 264
 265   return ms_pLogger;
 266 }
 267
 268 wxLog *wxLog::SetActiveTarget(wxLog *pLogger)
 269 {
 270   // flush the old messages before changing
 271   if ( ms_pLogger != NULL )
 272     ms_pLogger->Flush();
 273
 274   wxLog *pOldLogger = ms_pLogger;
 275   ms_pLogger = pLogger;
 276   return pOldLogger;
 277 }
 278
 279 wxString wxLog::TimeStamp() const
 280 {
 281   wxString str;
 282
 283   if ( !IsEmpty(m_szTimeFormat) ) {
 284     char szBuf[128];
 285     time_t timeNow;
 286     struct tm *ptmNow;
 287
 288     time(&timeNow);
 289     ptmNow = localtime(&timeNow);
 290
 291     strftime(szBuf, WXSIZEOF(szBuf), m_szTimeFormat, ptmNow);
 292     str = szBuf;
 293   }
 294
 295   return str;
 296 }
 297
 298 void wxLog::DoLog(wxLogLevel level, const char *szString)
 299 {
 300   // prepend a timestamp if not disabled
 301   wxString str = TimeStamp();
 302
 303   switch ( level ) {
 304     case wxLOG_FatalError:
 305       DoLogString(str << _("Fatal error: ") << szString);
 306       DoLogString(_("Program aborted."));
 307       Flush();
 308       abort();
 309       break;
 310
 311     case wxLOG_Error:
 312       DoLogString(str << _("Error: ") << szString);
 313       break;
 314
 315     case wxLOG_Warning:
 316       DoLogString(str << _("Warning: ") << szString);
 317       break;
 318
 319     case wxLOG_Info:
 320       if ( GetVerbose() )
 321     case wxLOG_Message:
 322         DoLogString(str + szString);
 323       // fall through
 324
 325     case wxLOG_Status:
 326       // nothing to do
 327       break;
 328
 329     case wxLOG_Trace:
 330     case wxLOG_Debug:
 331       #ifdef __WXDEBUG__
 332         DoLogString(str << (level == wxLOG_Trace ? _("Trace") : _("Debug"))
 333                         << ": " << szString);
 334       #endif
 335
 336       break;
 337
 338     default:
 339       wxFAIL_MSG(_("unknown log level in wxLog::DoLog"));
 340   }
 341 }
 342
 343 void wxLog::DoLogString(const char *WXUNUSED(szString))
 344 {
 345   wxFAIL_MSG(_("DoLogString must be overrided if it's called."));
 346 }
 347
 348 void wxLog::Flush()
 349 {
 350   // do nothing
 351 }
 352
 353 // ----------------------------------------------------------------------------
 354 // wxLogStderr class implementation
 355 // ----------------------------------------------------------------------------
 356
 357 wxLogStderr::wxLogStderr(FILE *fp)
 358 {
 359   if ( fp == NULL )
 360     m_fp = stderr;
 361   else
 362     m_fp = fp;
 363 }
 364
 365 void wxLogStderr::DoLogString(const char *szString)
 366 {
 367   fputs(szString, m_fp);
 368   fputc('\n', m_fp);
 369   fflush(m_fp);
 370 }
 371
 372 // ----------------------------------------------------------------------------
 373 // wxLogStream implementation
 374 // ----------------------------------------------------------------------------
 375
 376 wxLogStream::wxLogStream(ostream *ostr)
 377 {
 378   if ( ostr == NULL )
 379     m_ostr = &cerr;
 380   else
 381     m_ostr = ostr;
 382 }
 383
 384 void wxLogStream::DoLogString(const char *szString)
 385 {
 386   (*m_ostr) << szString << endl << flush;
 387 }
 388
 389 // ----------------------------------------------------------------------------
 390 // wxLogTextCtrl implementation
 391 // ----------------------------------------------------------------------------
 392 wxLogTextCtrl::wxLogTextCtrl(wxTextCtrl *pTextCtrl)
 393 // @@@ TODO: in wxGTK wxTextCtrl doesn't derive from streambuf
 394
 395 // Also, in DLL mode in wxMSW, can't use it.
 396 #if defined(NO_TEXT_WINDOW_STREAM)
 397 #else
 398              : wxLogStream(new ostream(pTextCtrl))
 399 #endif
 400 {
 401 }
 402
 403 wxLogTextCtrl::~wxLogTextCtrl()
 404 {
 405   delete m_ostr;
 406 }
 407
 408 // ----------------------------------------------------------------------------
 409 // wxLogGui implementation
 410 // ----------------------------------------------------------------------------
 411
 412 #ifndef   WX_TEST_MINIMAL
 413
 414 wxLogGui::wxLogGui()
 415 {
 416   m_bErrors = FALSE;
 417 }
 418
 419 void wxLogGui::Flush()
 420 {
 421   if ( !m_bHasMessages )
 422     return;
 423
 424   // @@@ ugly...
 425
 426   // concatenate all strings (but not too many to not overfill the msg box)
 427   wxString str;
 428   uint nLines    = 0,
 429        nMsgCount = m_aMessages.Count();
 430
 431   // start from the most recent message
 432   for ( uint n = nMsgCount; n > 0; n-- ) {
 433     // for Windows strings longer than this value are wrapped (NT 4.0)
 434     const uint nMsgLineWidth = 156;
 435
 436     nLines += (m_aMessages[n - 1].Len() + nMsgLineWidth - 1) / nMsgLineWidth;
 437
 438     if ( nLines > 25 )  // don't put too many lines in message box
 439       break;
 440
 441     str << m_aMessages[n - 1] << "\n";
 442   }
 443
 444   if ( m_bErrors ) {
 445     wxMessageBox(str, _("Error"), wxOK | wxICON_EXCLAMATION);
 446   }
 447   else {
 448     wxMessageBox(str, _("Information"), wxOK | wxICON_INFORMATION);
 449   }
 450
 451   // no undisplayed messages whatsoever
 452   m_bHasMessages =
 453   m_bErrors      = FALSE;
 454   m_aMessages.Empty();
 455 }
 456
 457 // the default behaviour is to discard all informational messages if there
 458 // are any errors/warnings.
 459 void wxLogGui::DoLog(wxLogLevel level, const char *szString)
 460 {
 461   switch ( level ) {
 462     case wxLOG_Info:
 463       if ( GetVerbose() )
 464     case wxLOG_Message:
 465         if ( !m_bErrors ) {
 466           m_aMessages.Add(szString);
 467           m_bHasMessages = TRUE;
 468         }
 469       break;
 470
 471     case wxLOG_Status:
 472       {
 473         // find the top window and set it's status text if it has any
 474         wxFrame *pFrame = gs_pFrame;
 475         if ( pFrame == NULL ) {
 476           wxWindow *pWin = wxTheApp->GetTopWindow();
 477           if ( pWin != NULL && pWin->IsKindOf(CLASSINFO(wxFrame)) ) {
 478             pFrame = (wxFrame *)pWin;
 479           }
 480         }
 481
 482         if ( pFrame != NULL )
 483           pFrame->SetStatusText(szString);
 484       }
 485       break;
 486
 487     case wxLOG_Trace:
 488     case wxLOG_Debug:
 489       #ifdef __WXDEBUG__
 490         {
 491           wxString strTime = TimeStamp();
 492
 493           #if defined(__WIN32__) && !defined(__WXSTUBS__)
 494               // don't prepend debug/trace here: it goes to the debug window
 495               // anyhow, but do put a timestamp
 496               OutputDebugString(strTime + szString + "\n\r");
 497           #else   //!WIN32
 498             // send them to stderr
 499             fprintf(stderr, "%s %s: %s\n",
 500                     strTime.c_str(),
 501                     level == wxLOG_Trace ? _("Trace") : _("Debug"),
 502                     szString);
 503             fflush(stderr);
 504           #endif  // WIN32
 505         }
 506       #endif
 507       break;
 508
 509     case wxLOG_FatalError:
 510       // show this one immediately
 511       wxMessageBox(szString, _("Fatal error"), wxICON_HAND);
 512       break;
 513
 514     case wxLOG_Error:
 515     case wxLOG_Warning:
 516       // discard earlier informational messages if this is the 1st error
 517       if ( !m_bErrors ) {
 518         m_aMessages.Empty();
 519         m_bHasMessages = TRUE;
 520         m_bErrors = TRUE;
 521       }
 522
 523       m_aMessages.Add(szString);
 524       break;
 525
 526     default:
 527       wxFAIL_MSG(_("unknown log level in wxLogGui::DoLog"));
 528   }
 529 }
 530
 531 // ----------------------------------------------------------------------------
 532 // wxLogWindow and wxLogFrame implementation
 533 // ----------------------------------------------------------------------------
 534
 535 // log frame class
 536 // ---------------
 537 class wxLogFrame : public wxFrame
 538 {
 539 public:
 540   // ctor & dtor
 541   wxLogFrame(wxFrame *pParent, wxLogWindow *log, const char *szTitle);
 542   virtual ~wxLogFrame();
 543
 544   // menu callbacks
 545   void OnClose(wxCommandEvent& event);
 546   void OnCloseWindow(wxCloseEvent& event);
 547   void OnSave (wxCommandEvent& event);
 548   void OnClear(wxCommandEvent& event);
 549
 550   void OnIdle(wxIdleEvent&);
 551
 552   // accessors
 553   wxTextCtrl *TextCtrl() const { return m_pTextCtrl; }
 554
 555 private:
 556   enum
 557   {
 558     Menu_Close = 100,
 559     Menu_Save,
 560     Menu_Clear
 561   };
 562
 563   // instead of closing just hide the window to be able to Show() it later
 564   void DoClose() { Show(FALSE); }
 565
 566   wxTextCtrl  *m_pTextCtrl;
 567   wxLogWindow *m_log;
 568
 569   DECLARE_EVENT_TABLE()
 570 };
 571
 572 BEGIN_EVENT_TABLE(wxLogFrame, wxFrame)
 573   // wxLogWindow menu events
 574   EVT_MENU(Menu_Close, wxLogFrame::OnClose)
 575   EVT_MENU(Menu_Save,  wxLogFrame::OnSave)
 576   EVT_MENU(Menu_Clear, wxLogFrame::OnClear)
 577
 578   EVT_CLOSE(wxLogFrame::OnCloseWindow)
 579 END_EVENT_TABLE()
 580
 581 wxLogFrame::wxLogFrame(wxFrame *pParent, wxLogWindow *log, const char *szTitle)
 582           : wxFrame(pParent, -1, szTitle)
 583 {
 584   m_log = log;
 585
 586   // @@ kludge: wxSIMPLE_BORDER is simply to prevent wxWindows from creating
 587   //    a rich edit control instead of a normal one we want in wxMSW
 588   m_pTextCtrl = new wxTextCtrl(this, -1, wxEmptyString, wxDefaultPosition,
 589                                wxDefaultSize,
 590                              //wxSIMPLE_BORDER |
 591                                wxTE_MULTILINE  |
 592                                wxHSCROLL       |
 593                                wxTE_READONLY);
 594
 595   // create menu
 596   wxMenuBar *pMenuBar = new wxMenuBar;
 597   wxMenu *pMenu = new wxMenu;
 598   pMenu->Append(Menu_Save,  _("&Save..."), _("Save log contents to file"));
 599   pMenu->Append(Menu_Clear, _("C&lear"), _("Clear the log contents"));
 600   pMenu->AppendSeparator();
 601   pMenu->Append(Menu_Close, _("&Close"), _("Close this window"));
 602   pMenuBar->Append(pMenu, _("&Log"));
 603   SetMenuBar(pMenuBar);
 604
 605   // status bar for menu prompts
 606   CreateStatusBar();
 607
 608   m_log->OnFrameCreate(this);
 609 }
 610
 611 void wxLogFrame::OnClose(wxCommandEvent& WXUNUSED(event))
 612 {
 613   DoClose();
 614 }
 615
 616 void wxLogFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 617 {
 618   DoClose();
 619 }
 620
 621 void wxLogFrame::OnSave(wxCommandEvent& WXUNUSED(event))
 622 {
 623   // get the file name
 624   // -----------------
 625   const char *szFileName = wxSaveFileSelector("log", "txt", "log.txt");
 626   if ( szFileName == NULL ) {
 627     // cancelled
 628     return;
 629   }
 630
 631   // open file
 632   // ---------
 633   wxFile file;
 634   bool bOk = FALSE;
 635   if ( wxFile::Exists(szFileName) ) {
 636     bool bAppend = FALSE;
 637     wxString strMsg;
 638     strMsg.Printf(_("Append log to file '%s' "
 639                     "(choosing [No] will overwrite it)?"), szFileName);
 640     switch ( wxMessageBox(strMsg, _("Question"), wxYES_NO | wxCANCEL) ) {
 641       case wxYES:
 642         bAppend = TRUE;
 643         break;
 644
 645       case wxNO:
 646         bAppend = FALSE;
 647         break;
 648
 649       case wxCANCEL:
 650         return;
 651
 652       default:
 653         wxFAIL_MSG(_("invalid message box return value"));
 654     }
 655
 656     if ( bAppend ) {
 657       bOk = file.Open(szFileName, wxFile::write_append);
 658     }
 659     else {
 660       bOk = file.Create(szFileName, TRUE /* overwrite */);
 661     }
 662   }
 663   else {
 664     bOk = file.Create(szFileName);
 665   }
 666
 667   // retrieve text and save it
 668   // -------------------------
 669 #ifdef __WXGTK__
 670   // @@@@ TODO: no GetNumberOfLines and GetLineText in wxGTK yet
 671   wxLogError(_("Sorry, this function is not implemented under GTK"));
 672 #else
 673   int nLines = m_pTextCtrl->GetNumberOfLines();
 674   for ( int nLine = 0; bOk && nLine < nLines; nLine++ ) {
 675     bOk = file.Write(m_pTextCtrl->GetLineText(nLine) + wxTextFile::GetEOL());
 676   }
 677 #endif //GTK
 678
 679   if ( bOk )
 680     bOk = file.Close();
 681
 682   if ( !bOk ) {
 683     wxLogError(_("Can't save log contents to file."));
 684     return;
 685   }
 686 }
 687
 688 void wxLogFrame::OnClear(wxCommandEvent& WXUNUSED(event))
 689 {
 690   m_pTextCtrl->Clear();
 691 }
 692
 693 wxLogFrame::~wxLogFrame()
 694 {
 695   m_log->OnFrameDelete(this);
 696 }
 697
 698 // wxLogWindow
 699 // -----------
 700 wxLogWindow::wxLogWindow(wxFrame *pParent,
 701                          const char *szTitle,
 702                          bool bShow,
 703                          bool bDoPass)
 704 {
 705   m_bPassMessages = bDoPass;
 706
 707   m_pLogFrame = new wxLogFrame(pParent, this, szTitle);
 708   m_pOldLog = wxLog::SetActiveTarget(this);
 709
 710   if ( bShow )
 711     m_pLogFrame->Show(TRUE);
 712 }
 713
 714 void wxLogWindow::Show(bool bShow)
 715 {
 716   m_pLogFrame->Show(bShow);
 717 }
 718
 719 void wxLogWindow::Flush()
 720 {
 721   if ( m_pOldLog != NULL )
 722     m_pOldLog->Flush();
 723
 724   m_bHasMessages = FALSE;
 725 }
 726
 727 void wxLogWindow::DoLog(wxLogLevel level, const char *szString)
 728 {
 729   // first let the previous logger show it
 730   if ( m_pOldLog != NULL && m_bPassMessages ) {
 731     // @@@ why can't we access protected wxLog method from here (we derive
 732     // from wxLog)? gcc gives "DoLog is protected in this context", what
 733     // does this mean? Anyhow, the cast is harmless and let's us do what
 734     // we want.
 735     ((wxLogWindow *)m_pOldLog)->DoLog(level, szString);
 736   }
 737
 738   // don't put trace messages in the text window for 2 reasons:
 739   // 1) there are too many of them
 740   // 2) they may provoke other trace messages thus sending a program into an
 741   //    infinite loop
 742   if ( m_pLogFrame && level != wxLOG_Trace ) {
 743     // and this will format it nicely and call our DoLogString()
 744     wxLog::DoLog(level, szString);
 745   }
 746
 747   m_bHasMessages = TRUE;
 748 }
 749
 750 void wxLogWindow::DoLogString(const char *szString)
 751 {
 752   // put the text into our window
 753   wxTextCtrl *pText = m_pLogFrame->TextCtrl();
 754
 755   // remove selection (WriteText is in fact ReplaceSelection)
 756   #ifdef __WXMSW__
 757     long nLen = pText->GetLastPosition();
 758     pText->SetSelection(nLen, nLen);
 759   #endif // Windows
 760
 761   pText->WriteText(szString);
 762   pText->WriteText("\n"); // "\n" ok here (_not_ "\r\n")
 763
 764   // ensure that the line can be seen
 765   // @@@ TODO
 766 }
 767
 768 wxFrame *wxLogWindow::GetFrame() const
 769 {
 770   return m_pLogFrame;
 771 }
 772
 773 void wxLogWindow::OnFrameCreate(wxFrame *frame)
 774 {
 775 }
 776
 777 void wxLogWindow::OnFrameDelete(wxFrame *frame)
 778 {
 779   m_pLogFrame = NULL;
 780 }
 781
 782 wxLogWindow::~wxLogWindow()
 783 {
 784   // may be NULL if log frame already auto destroyed itself
 785   delete m_pLogFrame;
 786 }
 787
 788 #endif  //WX_TEST_MINIMAL
 789
 790 // ============================================================================
 791 // Global functions/variables
 792 // ============================================================================
 793
 794 // ----------------------------------------------------------------------------
 795 // static variables
 796 // ----------------------------------------------------------------------------
 797 wxLog      *wxLog::ms_pLogger      = NULL;
 798 bool        wxLog::ms_bAutoCreate  = TRUE;
 799 wxTraceMask wxLog::ms_ulTraceMask  = (wxTraceMask)0;
 800
 801 // ----------------------------------------------------------------------------
 802 // stdout error logging helper
 803 // ----------------------------------------------------------------------------
 804
 805 // helper function: wraps the message and justifies it under given position
 806 // (looks more pretty on the terminal). Also adds newline at the end.
 807 //
 808 // @@ this is now disabled until I find a portable way of determining the
 809 //    terminal window size (ok, I found it but does anybody really cares?)
 810 #ifdef    LOG_PRETTY_WRAP
 811 static void wxLogWrap(FILE *f, const char *pszPrefix, const char *psz)
 812 {
 813   size_t nMax = 80; // @@@@
 814   size_t nStart = strlen(pszPrefix);
 815   fputs(pszPrefix, f);
 816
 817   size_t n;
 818   while ( *psz != '\0' ) {
 819     for ( n = nStart; (n < nMax) && (*psz != '\0'); n++ )
 820       putc(*psz++, f);
 821
 822     // wrapped?
 823     if ( *psz != '\0' ) {
 824       /*putc('\n', f);*/
 825       for ( n = 0; n < nStart; n++ )
 826         putc(' ', f);
 827
 828       // as we wrapped, squeeze all white space
 829       while ( isspace(*psz) )
 830         psz++;
 831     }
 832   }
 833
 834   putc('\n', f);
 835 }
 836 #endif  //LOG_PRETTY_WRAP
 837
 838 // ----------------------------------------------------------------------------
 839 // error code/error message retrieval functions
 840 // ----------------------------------------------------------------------------
 841
 842 // get error code from syste
 843 unsigned long wxSysErrorCode()
 844 {
 845   #ifdef  __WXMSW__
 846     #ifdef  __WIN32__
 847       return ::GetLastError();
 848     #else   //WIN16
 849       // @@@@ what to do on Windows 3.1?
 850       return 0;
 851     #endif  //WIN16/32
 852   #else   //Unix
 853     return errno;
 854   #endif  //Win/Unix
 855 }
 856
 857 // get error message from system
 858 const char *wxSysErrorMsg(unsigned long nErrCode)
 859 {
 860   if ( nErrCode == 0 )
 861     nErrCode = wxSysErrorCode();
 862
 863   #ifdef  __WXMSW__
 864     #ifdef  __WIN32__
 865       static char s_szBuf[LOG_BUFFER_SIZE / 2];
 866
 867       // get error message from system
 868       LPVOID lpMsgBuf;
 869       FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
 870                     NULL, nErrCode,
 871                     MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
 872                     (LPTSTR)&lpMsgBuf,
 873                     0, NULL);
 874
 875       // copy it to our buffer and free memory
 876       strncpy(s_szBuf, (const char *)lpMsgBuf, WXSIZEOF(s_szBuf) - 1);
 877       s_szBuf[WXSIZEOF(s_szBuf) - 1] = '\0';
 878       LocalFree(lpMsgBuf);
 879
 880       // returned string is capitalized and ended with '\r\n' - bad
 881       s_szBuf[0] = (char)wxToLower(s_szBuf[0]);
 882       size_t len = strlen(s_szBuf);
 883       if ( len > 0 ) {
 884         // truncate string
 885         if ( s_szBuf[len - 2] == '\r' )
 886           s_szBuf[len - 2] = '\0';
 887       }
 888
 889       return s_szBuf;
 890     #else   //Win16
 891       // TODO @@@@
 892       return NULL;
 893     #endif // Win16/32
 894   #else   // Unix
 895     return strerror(nErrCode);
 896   #endif  // Win/Unix
 897 }
 898
 899 // ----------------------------------------------------------------------------
 900 // debug helper
 901 // ----------------------------------------------------------------------------
 902
 903 #ifdef  __WXDEBUG__
 904
 905 void Trap()
 906 {
 907   #ifdef __WXMSW__
 908     DebugBreak();
 909   #elif defined(__WXSTUBS__)
 910     // TODO
 911   #else // Unix
 912     raise(SIGTRAP);
 913   #endif // Win/Unix
 914 }
 915
 916 // this function is called when an assert fails
 917 void wxOnAssert(const char *szFile, int nLine, const char *szMsg)
 918 {
 919   // this variable can be set to true to suppress "assert failure" messages
 920   static bool s_bNoAsserts = FALSE;
 921   static bool s_bInAssert = FALSE;
 922
 923   if ( s_bInAssert ) {
 924     // He-e-e-e-elp!! we're trapped in endless loop
 925     Trap();
 926   }
 927
 928   s_bInAssert = TRUE;
 929
 930   char szBuf[LOG_BUFFER_SIZE];
 931   sprintf(szBuf, _("Assert failed in file %s at line %d"), szFile, nLine);
 932   if ( szMsg != NULL ) {
 933     strcat(szBuf, ": ");
 934     strcat(szBuf, szMsg);
 935   }
 936   else {
 937     strcat(szBuf, ".");
 938   }
 939
 940   if ( !s_bNoAsserts ) {
 941     // send it to the normal log destination
 942     wxLogDebug(szBuf);
 943
 944     strcat(szBuf, _("\nDo you want to stop the program?"
 945                     "\nYou can also choose [Cancel] to suppress "
 946                     "further warnings."));
 947
 948     switch ( wxMessageBox(szBuf, _("Debug"),
 949                           wxYES_NO | wxCANCEL | wxICON_STOP ) ) {
 950       case wxYES:
 951         Trap();
 952         break;
 953
 954       case wxCANCEL:
 955         s_bNoAsserts = TRUE;
 956         break;
 957
 958       //case wxNO: nothing to do
 959     }
 960   }
 961
 962   s_bInAssert = FALSE;
 963 }
 964
 965 #endif  //WXDEBUG
 966