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 = (wxFrame *) 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  wxUSE_NOGUI
 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, bool bNoFlashOld)
 269 {
 270   // flush the old messages before changing
 271   if ( (ms_pLogger != NULL) && !bNoFlashOld ) {
 272     ms_pLogger->Flush();
 273   }
 274
 275   wxLog *pOldLogger = ms_pLogger;
 276   ms_pLogger = pLogger;
 277   return pOldLogger;
 278 }
 279
 280 wxString wxLog::TimeStamp() const
 281 {
 282   wxString str;
 283
 284   if ( !IsEmpty(m_szTimeFormat) ) {
 285     char szBuf[128];
 286     time_t timeNow;
 287     struct tm *ptmNow;
 288
 289     time(&timeNow);
 290     ptmNow = localtime(&timeNow);
 291
 292     strftime(szBuf, WXSIZEOF(szBuf), m_szTimeFormat, ptmNow);
 293     str = szBuf;
 294   }
 295
 296   return str;
 297 }
 298
 299 void wxLog::DoLog(wxLogLevel level, const char *szString)
 300 {
 301   // prepend a timestamp if not disabled
 302   wxString str = TimeStamp();
 303
 304   switch ( level ) {
 305     case wxLOG_FatalError:
 306       DoLogString(str << _("Fatal error: ") << szString);
 307       DoLogString(_("Program aborted."));
 308       Flush();
 309       abort();
 310       break;
 311
 312     case wxLOG_Error:
 313       DoLogString(str << _("Error: ") << szString);
 314       break;
 315
 316     case wxLOG_Warning:
 317       DoLogString(str << _("Warning: ") << szString);
 318       break;
 319
 320     case wxLOG_Info:
 321       if ( GetVerbose() )
 322     case wxLOG_Message:
 323         DoLogString(str + szString);
 324       // fall through
 325
 326     case wxLOG_Status:
 327       // nothing to do
 328       break;
 329
 330     case wxLOG_Trace:
 331     case wxLOG_Debug:
 332       #ifdef __WXDEBUG__
 333         DoLogString(str << (level == wxLOG_Trace ? _("Trace") : _("Debug"))
 334                         << ": " << szString);
 335       #endif
 336
 337       break;
 338
 339     default:
 340       wxFAIL_MSG(_("unknown log level in wxLog::DoLog"));
 341   }
 342 }
 343
 344 void wxLog::DoLogString(const char *WXUNUSED(szString))
 345 {
 346   wxFAIL_MSG(_("DoLogString must be overrided if it's called."));
 347 }
 348
 349 void wxLog::Flush()
 350 {
 351   // do nothing
 352 }
 353
 354 // ----------------------------------------------------------------------------
 355 // wxLogStderr class implementation
 356 // ----------------------------------------------------------------------------
 357
 358 wxLogStderr::wxLogStderr(FILE *fp)
 359 {
 360   if ( fp == NULL )
 361     m_fp = stderr;
 362   else
 363     m_fp = fp;
 364 }
 365
 366 void wxLogStderr::DoLogString(const char *szString)
 367 {
 368   fputs(szString, m_fp);
 369   fputc('\n', m_fp);
 370   fflush(m_fp);
 371 }
 372
 373 // ----------------------------------------------------------------------------
 374 // wxLogStream implementation
 375 // ----------------------------------------------------------------------------
 376
 377 wxLogStream::wxLogStream(ostream *ostr)
 378 {
 379   if ( ostr == NULL )
 380     m_ostr = &cerr;
 381   else
 382     m_ostr = ostr;
 383 }
 384
 385 void wxLogStream::DoLogString(const char *szString)
 386 {
 387   (*m_ostr) << szString << endl << flush;
 388 }
 389
 390 #ifndef   wxUSE_NOGUI
 391 // ----------------------------------------------------------------------------
 392 // wxLogTextCtrl implementation
 393 // ----------------------------------------------------------------------------
 394 wxLogTextCtrl::wxLogTextCtrl(wxTextCtrl *pTextCtrl)
 395 // @@@ TODO: in wxGTK wxTextCtrl doesn't derive from streambuf
 396
 397 // Also, in DLL mode in wxMSW, can't use it.
 398 #if defined(NO_TEXT_WINDOW_STREAM)
 399 #else
 400              : wxLogStream(new ostream(pTextCtrl))
 401 #endif
 402 {
 403 }
 404
 405 wxLogTextCtrl::~wxLogTextCtrl()
 406 {
 407   delete m_ostr;
 408 }
 409
 410 // ----------------------------------------------------------------------------
 411 // wxLogGui implementation
 412 // ----------------------------------------------------------------------------
 413
 414 wxLogGui::wxLogGui()
 415 {
 416   m_bErrors = FALSE;
 417 }
 418
 419 void wxLogGui::Flush()
 420 {
 421   if ( !m_bHasMessages )
 422     return;
 423
 424   // do it right now to block any new calls to Flush() while we're here
 425   m_bHasMessages = FALSE;
 426
 427   // @@@ ugly...
 428
 429   // concatenate all strings (but not too many to not overfill the msg box)
 430   wxString str;
 431   size_t nLines    = 0,
 432        nMsgCount = m_aMessages.Count();
 433
 434   // start from the most recent message
 435   for ( size_t n = nMsgCount; n > 0; n-- ) {
 436     // for Windows strings longer than this value are wrapped (NT 4.0)
 437     const size_t nMsgLineWidth = 156;
 438
 439     nLines += (m_aMessages[n - 1].Len() + nMsgLineWidth - 1) / nMsgLineWidth;
 440
 441     if ( nLines > 25 )  // don't put too many lines in message box
 442       break;
 443
 444     str << m_aMessages[n - 1] << "\n";
 445   }
 446
 447   if ( m_bErrors ) {
 448     wxMessageBox(str, _("Error"), wxOK | wxICON_EXCLAMATION);
 449   }
 450   else {
 451     wxMessageBox(str, _("Information"), wxOK | wxICON_INFORMATION);
 452   }
 453
 454   // no undisplayed messages whatsoever
 455   m_bErrors      = FALSE;
 456   m_aMessages.Empty();
 457 }
 458
 459 // the default behaviour is to discard all informational messages if there
 460 // are any errors/warnings.
 461 void wxLogGui::DoLog(wxLogLevel level, const char *szString)
 462 {
 463   switch ( level ) {
 464     case wxLOG_Info:
 465       if ( GetVerbose() )
 466     case wxLOG_Message:
 467         if ( !m_bErrors ) {
 468           m_aMessages.Add(szString);
 469           m_bHasMessages = TRUE;
 470         }
 471       break;
 472
 473     case wxLOG_Status:
 474       {
 475         // find the top window and set it's status text if it has any
 476         wxFrame *pFrame = gs_pFrame;
 477         if ( pFrame == NULL ) {
 478           wxWindow *pWin = wxTheApp->GetTopWindow();
 479           if ( pWin != NULL && pWin->IsKindOf(CLASSINFO(wxFrame)) ) {
 480             pFrame = (wxFrame *)pWin;
 481           }
 482         }
 483
 484         if ( pFrame != NULL )
 485           pFrame->SetStatusText(szString);
 486       }
 487       break;
 488
 489     case wxLOG_Trace:
 490     case wxLOG_Debug:
 491       #ifdef __WXDEBUG__
 492         {
 493           wxString strTime = TimeStamp();
 494
 495           #if defined(__WIN32__) && !defined(__WXSTUBS__)
 496               // don't prepend debug/trace here: it goes to the debug window
 497               // anyhow, but do put a timestamp
 498               OutputDebugString(strTime + szString + "\n\r");
 499           #else   //!WIN32
 500             // send them to stderr
 501             fprintf(stderr, "%s %s: %s\n",
 502                     strTime.c_str(),
 503                     level == wxLOG_Trace ? _("Trace") : _("Debug"),
 504                     szString);
 505             fflush(stderr);
 506           #endif  // WIN32
 507         }
 508       #endif
 509       break;
 510
 511     case wxLOG_FatalError:
 512       // show this one immediately
 513       wxMessageBox(szString, _("Fatal error"), wxICON_HAND);
 514       break;
 515
 516     case wxLOG_Error:
 517     case wxLOG_Warning:
 518       // discard earlier informational messages if this is the 1st error
 519       if ( !m_bErrors ) {
 520         m_aMessages.Empty();
 521         m_bHasMessages = TRUE;
 522         m_bErrors = TRUE;
 523       }
 524
 525       m_aMessages.Add(szString);
 526       break;
 527
 528     default:
 529       wxFAIL_MSG(_("unknown log level in wxLogGui::DoLog"));
 530   }
 531 }
 532
 533 // ----------------------------------------------------------------------------
 534 // wxLogWindow and wxLogFrame implementation
 535 // ----------------------------------------------------------------------------
 536
 537 // log frame class
 538 // ---------------
 539 class wxLogFrame : public wxFrame
 540 {
 541 public:
 542   // ctor & dtor
 543   wxLogFrame(wxFrame *pParent, wxLogWindow *log, const char *szTitle);
 544   virtual ~wxLogFrame();
 545
 546   // menu callbacks
 547   void OnClose(wxCommandEvent& event);
 548   void OnCloseWindow(wxCloseEvent& event);
 549   void OnSave (wxCommandEvent& event);
 550   void OnClear(wxCommandEvent& event);
 551
 552   void OnIdle(wxIdleEvent&);
 553
 554   // accessors
 555   wxTextCtrl *TextCtrl() const { return m_pTextCtrl; }
 556
 557 private:
 558   enum
 559   {
 560     Menu_Close = 100,
 561     Menu_Save,
 562     Menu_Clear
 563   };
 564
 565   // instead of closing just hide the window to be able to Show() it later
 566   void DoClose() { Show(FALSE); }
 567
 568   wxTextCtrl  *m_pTextCtrl;
 569   wxLogWindow *m_log;
 570
 571   DECLARE_EVENT_TABLE()
 572 };
 573
 574 BEGIN_EVENT_TABLE(wxLogFrame, wxFrame)
 575   // wxLogWindow menu events
 576   EVT_MENU(Menu_Close, wxLogFrame::OnClose)
 577   EVT_MENU(Menu_Save,  wxLogFrame::OnSave)
 578   EVT_MENU(Menu_Clear, wxLogFrame::OnClear)
 579
 580   EVT_CLOSE(wxLogFrame::OnCloseWindow)
 581 END_EVENT_TABLE()
 582
 583 wxLogFrame::wxLogFrame(wxFrame *pParent, wxLogWindow *log, const char *szTitle)
 584           : wxFrame(pParent, -1, szTitle)
 585 {
 586   m_log = log;
 587
 588   // @@ kludge: wxSIMPLE_BORDER is simply to prevent wxWindows from creating
 589   //    a rich edit control instead of a normal one we want in wxMSW
 590   m_pTextCtrl = new wxTextCtrl(this, -1, wxEmptyString, wxDefaultPosition,
 591                                wxDefaultSize,
 592                              //wxSIMPLE_BORDER |
 593                                wxTE_MULTILINE  |
 594                                wxHSCROLL       |
 595                                wxTE_READONLY);
 596
 597   // create menu
 598   wxMenuBar *pMenuBar = new wxMenuBar;
 599   wxMenu *pMenu = new wxMenu;
 600   pMenu->Append(Menu_Save,  _("&Save..."), _("Save log contents to file"));
 601   pMenu->Append(Menu_Clear, _("C&lear"), _("Clear the log contents"));
 602   pMenu->AppendSeparator();
 603   pMenu->Append(Menu_Close, _("&Close"), _("Close this window"));
 604   pMenuBar->Append(pMenu, _("&Log"));
 605   SetMenuBar(pMenuBar);
 606
 607   // status bar for menu prompts
 608   CreateStatusBar();
 609
 610   m_log->OnFrameCreate(this);
 611 }
 612
 613 void wxLogFrame::OnClose(wxCommandEvent& WXUNUSED(event))
 614 {
 615   DoClose();
 616 }
 617
 618 void wxLogFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
 619 {
 620   DoClose();
 621 }
 622
 623 void wxLogFrame::OnSave(wxCommandEvent& WXUNUSED(event))
 624 {
 625   // get the file name
 626   // -----------------
 627   const char *szFileName = wxSaveFileSelector("log", "txt", "log.txt");
 628   if ( szFileName == NULL ) {
 629     // cancelled
 630     return;
 631   }
 632
 633   // open file
 634   // ---------
 635   wxFile file;
 636   bool bOk = FALSE;
 637   if ( wxFile::Exists(szFileName) ) {
 638     bool bAppend = FALSE;
 639     wxString strMsg;
 640     strMsg.Printf(_("Append log to file '%s' "
 641                     "(choosing [No] will overwrite it)?"), szFileName);
 642     switch ( wxMessageBox(strMsg, _("Question"), wxYES_NO | wxCANCEL) ) {
 643       case wxYES:
 644         bAppend = TRUE;
 645         break;
 646
 647       case wxNO:
 648         bAppend = FALSE;
 649         break;
 650
 651       case wxCANCEL:
 652         return;
 653
 654       default:
 655         wxFAIL_MSG(_("invalid message box return value"));
 656     }
 657
 658     if ( bAppend ) {
 659       bOk = file.Open(szFileName, wxFile::write_append);
 660     }
 661     else {
 662       bOk = file.Create(szFileName, TRUE /* overwrite */);
 663     }
 664   }
 665   else {
 666     bOk = file.Create(szFileName);
 667   }
 668
 669   // retrieve text and save it
 670   // -------------------------
 671 #ifdef __WXGTK__
 672   // @@@@ TODO: no GetNumberOfLines and GetLineText in wxGTK yet
 673   wxLogError(_("Sorry, this function is not implemented under GTK"));
 674 #else
 675   int nLines = m_pTextCtrl->GetNumberOfLines();
 676   for ( int nLine = 0; bOk && nLine < nLines; nLine++ ) {
 677     bOk = file.Write(m_pTextCtrl->GetLineText(nLine) + wxTextFile::GetEOL());
 678   }
 679 #endif //GTK
 680
 681   if ( bOk )
 682     bOk = file.Close();
 683
 684   if ( !bOk ) {
 685     wxLogError(_("Can't save log contents to file."));
 686     return;
 687   }
 688 }
 689
 690 void wxLogFrame::OnClear(wxCommandEvent& WXUNUSED(event))
 691 {
 692   m_pTextCtrl->Clear();
 693 }
 694
 695 wxLogFrame::~wxLogFrame()
 696 {
 697   m_log->OnFrameDelete(this);
 698 }
 699
 700 // wxLogWindow
 701 // -----------
 702 wxLogWindow::wxLogWindow(wxFrame *pParent,
 703                          const char *szTitle,
 704                          bool bShow,
 705                          bool bDoPass)
 706 {
 707   m_bPassMessages = bDoPass;
 708
 709   m_pLogFrame = new wxLogFrame(pParent, this, szTitle);
 710   m_pOldLog = wxLog::SetActiveTarget(this);
 711
 712   if ( bShow )
 713     m_pLogFrame->Show(TRUE);
 714 }
 715
 716 void wxLogWindow::Show(bool bShow)
 717 {
 718   m_pLogFrame->Show(bShow);
 719 }
 720
 721 void wxLogWindow::Flush()
 722 {
 723   if ( m_pOldLog != NULL )
 724     m_pOldLog->Flush();
 725
 726   m_bHasMessages = FALSE;
 727 }
 728
 729 void wxLogWindow::DoLog(wxLogLevel level, const char *szString)
 730 {
 731   // first let the previous logger show it
 732   if ( m_pOldLog != NULL && m_bPassMessages ) {
 733     // @@@ why can't we access protected wxLog method from here (we derive
 734     // from wxLog)? gcc gives "DoLog is protected in this context", what
 735     // does this mean? Anyhow, the cast is harmless and let's us do what
 736     // we want.
 737     ((wxLogWindow *)m_pOldLog)->DoLog(level, szString);
 738   }
 739
 740   if ( m_pLogFrame ) {
 741     switch ( level ) {
 742       case wxLOG_Status:
 743         // by default, these messages are ignored by wxLog, so process
 744         // them ourselves
 745         {
 746           wxString str = TimeStamp();
 747           str << _("Status: ") << szString;
 748           DoLogString(str);
 749         }
 750         break;
 751
 752       // don't put trace messages in the text window for 2 reasons:
 753       // 1) there are too many of them
 754       // 2) they may provoke other trace messages thus sending a program
 755       //    into an infinite loop
 756       case wxLOG_Trace:
 757         break;
 758
 759       default:
 760         // and this will format it nicely and call our DoLogString()
 761         wxLog::DoLog(level, szString);
 762     }
 763   }
 764
 765   m_bHasMessages = TRUE;
 766 }
 767
 768 void wxLogWindow::DoLogString(const char *szString)
 769 {
 770   // put the text into our window
 771   wxTextCtrl *pText = m_pLogFrame->TextCtrl();
 772
 773   // remove selection (WriteText is in fact ReplaceSelection)
 774   #ifdef __WXMSW__
 775     long nLen = pText->GetLastPosition();
 776     pText->SetSelection(nLen, nLen);
 777   #endif // Windows
 778
 779   pText->WriteText(szString);
 780   pText->WriteText("\n"); // "\n" ok here (_not_ "\r\n")
 781
 782   // ensure that the line can be seen
 783   // @@@ TODO
 784 }
 785
 786 wxFrame *wxLogWindow::GetFrame() const
 787 {
 788   return m_pLogFrame;
 789 }
 790
 791 void wxLogWindow::OnFrameCreate(wxFrame *WXUNUSED(frame))
 792 {
 793 }
 794
 795 void wxLogWindow::OnFrameDelete(wxFrame *WXUNUSED(frame))
 796 {
 797   m_pLogFrame = (wxLogFrame *) NULL;
 798 }
 799
 800 wxLogWindow::~wxLogWindow()
 801 {
 802   // may be NULL if log frame already auto destroyed itself
 803   delete m_pLogFrame;
 804 }
 805
 806 #endif  //wxUSE_NOGUI
 807
 808 // ============================================================================
 809 // Global functions/variables
 810 // ============================================================================
 811
 812 // ----------------------------------------------------------------------------
 813 // static variables
 814 // ----------------------------------------------------------------------------
 815 wxLog      *wxLog::ms_pLogger      = (wxLog *) NULL;
 816 bool        wxLog::ms_bAutoCreate  = TRUE;
 817 wxTraceMask wxLog::ms_ulTraceMask  = (wxTraceMask)0;
 818
 819 // ----------------------------------------------------------------------------
 820 // stdout error logging helper
 821 // ----------------------------------------------------------------------------
 822
 823 // helper function: wraps the message and justifies it under given position
 824 // (looks more pretty on the terminal). Also adds newline at the end.
 825 //
 826 // @@ this is now disabled until I find a portable way of determining the
 827 //    terminal window size (ok, I found it but does anybody really cares?)
 828 #ifdef    LOG_PRETTY_WRAP
 829 static void wxLogWrap(FILE *f, const char *pszPrefix, const char *psz)
 830 {
 831   size_t nMax = 80; // @@@@
 832   size_t nStart = strlen(pszPrefix);
 833   fputs(pszPrefix, f);
 834
 835   size_t n;
 836   while ( *psz != '\0' ) {
 837     for ( n = nStart; (n < nMax) && (*psz != '\0'); n++ )
 838       putc(*psz++, f);
 839
 840     // wrapped?
 841     if ( *psz != '\0' ) {
 842       /*putc('\n', f);*/
 843       for ( n = 0; n < nStart; n++ )
 844         putc(' ', f);
 845
 846       // as we wrapped, squeeze all white space
 847       while ( isspace(*psz) )
 848         psz++;
 849     }
 850   }
 851
 852   putc('\n', f);
 853 }
 854 #endif  //LOG_PRETTY_WRAP
 855
 856 // ----------------------------------------------------------------------------
 857 // error code/error message retrieval functions
 858 // ----------------------------------------------------------------------------
 859
 860 // get error code from syste
 861 unsigned long wxSysErrorCode()
 862 {
 863   #ifdef  __WXMSW__
 864     #ifdef  __WIN32__
 865       return ::GetLastError();
 866     #else   //WIN16
 867       // @@@@ what to do on Windows 3.1?
 868       return 0;
 869     #endif  //WIN16/32
 870   #else   //Unix
 871     return errno;
 872   #endif  //Win/Unix
 873 }
 874
 875 // get error message from system
 876 const char *wxSysErrorMsg(unsigned long nErrCode)
 877 {
 878   if ( nErrCode == 0 )
 879     nErrCode = wxSysErrorCode();
 880
 881   #ifdef  __WXMSW__
 882     #ifdef  __WIN32__
 883       static char s_szBuf[LOG_BUFFER_SIZE / 2];
 884
 885       // get error message from system
 886       LPVOID lpMsgBuf;
 887       FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
 888                     NULL, nErrCode,
 889                     MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
 890                     (LPTSTR)&lpMsgBuf,
 891                     0, NULL);
 892
 893       // copy it to our buffer and free memory
 894       strncpy(s_szBuf, (const char *)lpMsgBuf, WXSIZEOF(s_szBuf) - 1);
 895       s_szBuf[WXSIZEOF(s_szBuf) - 1] = '\0';
 896       LocalFree(lpMsgBuf);
 897
 898       // returned string is capitalized and ended with '\r\n' - bad
 899       s_szBuf[0] = (char)wxToLower(s_szBuf[0]);
 900       size_t len = strlen(s_szBuf);
 901       if ( len > 0 ) {
 902         // truncate string
 903         if ( s_szBuf[len - 2] == '\r' )
 904           s_szBuf[len - 2] = '\0';
 905       }
 906
 907       return s_szBuf;
 908     #else   //Win16
 909       // TODO @@@@
 910       return NULL;
 911     #endif // Win16/32
 912   #else   // Unix
 913     return strerror(nErrCode);
 914   #endif  // Win/Unix
 915 }
 916
 917 // ----------------------------------------------------------------------------
 918 // debug helper
 919 // ----------------------------------------------------------------------------
 920
 921 #ifdef  __WXDEBUG__
 922
 923 void Trap()
 924 {
 925   #ifdef __WXMSW__
 926     DebugBreak();
 927   #elif defined(__WXSTUBS__)
 928     // TODO
 929   #else // Unix
 930     raise(SIGTRAP);
 931   #endif // Win/Unix
 932 }
 933
 934 // this function is called when an assert fails
 935 void wxOnAssert(const char *szFile, int nLine, const char *szMsg)
 936 {
 937   // this variable can be set to true to suppress "assert failure" messages
 938   static bool s_bNoAsserts = FALSE;
 939   static bool s_bInAssert = FALSE;
 940
 941   if ( s_bInAssert ) {
 942     // He-e-e-e-elp!! we're trapped in endless loop
 943     Trap();
 944   }
 945
 946   s_bInAssert = TRUE;
 947
 948   char szBuf[LOG_BUFFER_SIZE];
 949   sprintf(szBuf, _("Assert failed in file %s at line %d"), szFile, nLine);
 950   if ( szMsg != NULL ) {
 951     strcat(szBuf, ": ");
 952     strcat(szBuf, szMsg);
 953   }
 954   else {
 955     strcat(szBuf, ".");
 956   }
 957
 958   if ( !s_bNoAsserts ) {
 959     // send it to the normal log destination
 960     wxLogDebug(szBuf);
 961
 962     #ifdef wxUSE_NOGUI
 963       Trap();
 964     #else
 965       strcat(szBuf, _("\nDo you want to stop the program?"
 966                       "\nYou can also choose [Cancel] to suppress "
 967                       "further warnings."));
 968
 969       switch ( wxMessageBox(szBuf, _("Debug"),
 970                             wxYES_NO | wxCANCEL | wxICON_STOP ) ) {
 971         case wxYES:
 972           Trap();
 973           break;
 974
 975         case wxCANCEL:
 976           s_bNoAsserts = TRUE;
 977           break;
 978
 979         //case wxNO: nothing to do
 980       }
 981     #endif // USE_NOGUI
 982   }
 983
 984   s_bInAssert = FALSE;
 985 }
 986
 987 #endif  //WXDEBUG
 988