1 /////////////////////////////////////////////////////////////////////////////
3 // Purpose: Assorted wxLogXXX functions, and wxLog (sink for logs)
4 // Author: Vadim Zeitlin
8 // Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
9 // Licence: wxWindows license
10 /////////////////////////////////////////////////////////////////////////////
12 // ============================================================================
14 // ============================================================================
16 // ----------------------------------------------------------------------------
18 // ----------------------------------------------------------------------------
20 #pragma implementation "log.h"
23 // For compilers that support precompilation, includes "wx.h".
24 #include "wx/wxprec.h"
34 #include <wx/string.h>
38 #include <wx/msgdlg.h>
39 #include <wx/filedlg.h>
40 #include <wx/textctrl.h>
44 #include <wx/textfile.h>
48 // other standard headers
55 // Redefines OutputDebugString if necessary
56 #include "wx/msw/private.h"
61 // ----------------------------------------------------------------------------
62 // non member functions
63 // ----------------------------------------------------------------------------
65 // define this to enable wrapping of log messages
66 //#define LOG_PRETTY_WRAP
68 #ifdef LOG_PRETTY_WRAP
69 static void wxLogWrap(FILE *f, const char *pszPrefix, const char *psz);
72 // ----------------------------------------------------------------------------
74 // ----------------------------------------------------------------------------
76 // we use a global variable to store the frame pointer for wxLogStatus - bad,
77 // but it's he easiest way
78 static wxFrame *gs_pFrame; // FIXME MT-unsafe
80 // ============================================================================
82 // ============================================================================
84 // ----------------------------------------------------------------------------
85 // implementation of Log functions
87 // NB: unfortunately we need all these distinct functions, we can't make them
88 // macros and not all compilers inline vararg functions.
89 // ----------------------------------------------------------------------------
91 // log functions can't allocate memory (LogError("out of memory...") should
92 // work!), so we use a static buffer for all log messages
93 #define LOG_BUFFER_SIZE (4096)
95 // static buffer for error messages (FIXME MT-unsafe)
96 static wxChar s_szBuf[LOG_BUFFER_SIZE];
98 // generic log function
99 void wxLogGeneric(wxLogLevel level, const wxChar *szFormat, ...)
101 if ( wxLog::GetActiveTarget() != NULL ) {
103 va_start(argptr, szFormat);
104 wxVsprintf(s_szBuf, szFormat, argptr);
107 wxLog::OnLog(level, s_szBuf, time(NULL));
111 #define IMPLEMENT_LOG_FUNCTION(level) \
112 void wxLog##level(const wxChar *szFormat, ...) \
114 if ( wxLog::GetActiveTarget() != NULL ) { \
116 va_start(argptr, szFormat); \
117 wxVsprintf(s_szBuf, szFormat, argptr); \
120 wxLog::OnLog(wxLOG_##level, s_szBuf, time(NULL)); \
124 IMPLEMENT_LOG_FUNCTION(FatalError)
125 IMPLEMENT_LOG_FUNCTION(Error)
126 IMPLEMENT_LOG_FUNCTION(Warning)
127 IMPLEMENT_LOG_FUNCTION(Message)
128 IMPLEMENT_LOG_FUNCTION(Info)
129 IMPLEMENT_LOG_FUNCTION(Status)
131 // accepts an additional argument which tells to which frame the output should
133 void wxLogStatus(wxFrame *pFrame, const wxChar *szFormat, ...)
135 wxLog *pLog = wxLog::GetActiveTarget();
136 if ( pLog != NULL ) {
138 va_start(argptr, szFormat);
139 wxVsprintf(s_szBuf, szFormat, argptr);
142 wxASSERT( gs_pFrame == NULL ); // should be reset!
144 wxLog::OnLog(wxLOG_Status, s_szBuf, time(NULL));
145 gs_pFrame = (wxFrame *) NULL;
149 // same as info, but only if 'verbose' mode is on
150 void wxLogVerbose(const wxChar *szFormat, ...)
152 wxLog *pLog = wxLog::GetActiveTarget();
153 if ( pLog != NULL && pLog->GetVerbose() ) {
155 va_start(argptr, szFormat);
156 wxVsprintf(s_szBuf, szFormat, argptr);
159 wxLog::OnLog(wxLOG_Info, s_szBuf, time(NULL));
165 #define IMPLEMENT_LOG_DEBUG_FUNCTION(level) \
166 void wxLog##level(const wxChar *szFormat, ...) \
168 if ( wxLog::GetActiveTarget() != NULL ) { \
170 va_start(argptr, szFormat); \
171 wxVsprintf(s_szBuf, szFormat, argptr); \
174 wxLog::OnLog(wxLOG_##level, s_szBuf, time(NULL)); \
178 void wxLogTrace(const wxChar *mask, const wxChar *szFormat, ...)
180 wxLog *pLog = wxLog::GetActiveTarget();
182 if ( pLog != NULL && wxLog::IsAllowedTraceMask(mask) ) {
184 va_start(argptr, szFormat);
185 wxVsprintf(s_szBuf, szFormat, argptr);
188 wxLog::OnLog(wxLOG_Trace, s_szBuf, time(NULL));
192 void wxLogTrace(wxTraceMask mask, const wxChar *szFormat, ...)
194 wxLog *pLog = wxLog::GetActiveTarget();
196 // we check that all of mask bits are set in the current mask, so
197 // that wxLogTrace(wxTraceRefCount | wxTraceOle) will only do something
198 // if both bits are set.
199 if ( pLog != NULL && ((pLog->GetTraceMask() & mask) == mask) ) {
201 va_start(argptr, szFormat);
202 wxVsprintf(s_szBuf, szFormat, argptr);
205 wxLog::OnLog(wxLOG_Trace, s_szBuf, time(NULL));
210 #define IMPLEMENT_LOG_DEBUG_FUNCTION(level)
213 IMPLEMENT_LOG_DEBUG_FUNCTION(Debug)
214 IMPLEMENT_LOG_DEBUG_FUNCTION(Trace)
216 // wxLogSysError: one uses the last error code, for other you must give it
219 // common part of both wxLogSysError
220 void wxLogSysErrorHelper(long lErrCode)
222 wxChar szErrMsg[LOG_BUFFER_SIZE / 2];
223 wxSprintf(szErrMsg, _(" (error %ld: %s)"), lErrCode, wxSysErrorMsg(lErrCode));
224 wxStrncat(s_szBuf, szErrMsg, WXSIZEOF(s_szBuf) - wxStrlen(s_szBuf));
226 wxLog::OnLog(wxLOG_Error, s_szBuf, time(NULL));
229 void WXDLLEXPORT wxLogSysError(const wxChar *szFormat, ...)
232 va_start(argptr, szFormat);
233 wxVsprintf(s_szBuf, szFormat, argptr);
236 wxLogSysErrorHelper(wxSysErrorCode());
239 void WXDLLEXPORT wxLogSysError(long lErrCode, const wxChar *szFormat, ...)
242 va_start(argptr, szFormat);
243 wxVsprintf(s_szBuf, szFormat, argptr);
246 wxLogSysErrorHelper(lErrCode);
249 // ----------------------------------------------------------------------------
250 // wxLog class implementation
251 // ----------------------------------------------------------------------------
255 m_bHasMessages = FALSE;
257 // enable verbose messages by default in the debug builds
262 #endif // debug/release
265 wxLog *wxLog::GetActiveTarget()
267 if ( ms_bAutoCreate && ms_pLogger == NULL ) {
268 // prevent infinite recursion if someone calls wxLogXXX() from
269 // wxApp::CreateLogTarget()
270 static bool s_bInGetActiveTarget = FALSE;
271 if ( !s_bInGetActiveTarget ) {
272 s_bInGetActiveTarget = TRUE;
275 ms_pLogger = new wxLogStderr;
277 // ask the application to create a log target for us
278 if ( wxTheApp != NULL )
279 ms_pLogger = wxTheApp->CreateLogTarget();
281 ms_pLogger = new wxLogStderr;
284 s_bInGetActiveTarget = FALSE;
286 // do nothing if it fails - what can we do?
293 wxLog *wxLog::SetActiveTarget(wxLog *pLogger)
295 if ( ms_pLogger != NULL ) {
296 // flush the old messages before changing because otherwise they might
297 // get lost later if this target is not restored
301 wxLog *pOldLogger = ms_pLogger;
302 ms_pLogger = pLogger;
307 void wxLog::RemoveTraceMask(const wxString& str)
309 int index = ms_aTraceMasks.Index(str);
310 if ( index != wxNOT_FOUND )
311 ms_aTraceMasks.Remove((size_t)index);
314 void wxLog::DoLog(wxLogLevel level, const wxChar *szString, time_t t)
317 case wxLOG_FatalError:
318 DoLogString(wxString(_("Fatal error: ")) + szString, t);
319 DoLogString(_("Program aborted."), t);
325 DoLogString(wxString(_("Error: ")) + szString, t);
329 DoLogString(wxString(_("Warning: ")) + szString, t);
335 default: // log unknown log levels too
336 DoLogString(szString, t);
346 DoLogString(szString, t);
352 void wxLog::DoLogString(const wxChar *WXUNUSED(szString), time_t WXUNUSED(t))
354 wxFAIL_MSG(_T("DoLogString must be overriden if it's called."));
362 // ----------------------------------------------------------------------------
363 // wxLogStderr class implementation
364 // ----------------------------------------------------------------------------
366 wxLogStderr::wxLogStderr(FILE *fp)
374 void wxLogStderr::DoLogString(const wxChar *szString, time_t WXUNUSED(t))
376 wxString str(szString);
379 fputs(str.mb_str(), m_fp);
382 // under Windows, programs usually don't have stderr at all, so make show the
383 // messages also under debugger
385 OutputDebugString(str + _T('\r'));
389 // ----------------------------------------------------------------------------
390 // wxLogStream implementation
391 // ----------------------------------------------------------------------------
393 #if wxUSE_STD_IOSTREAM
394 wxLogStream::wxLogStream(ostream *ostr)
402 void wxLogStream::DoLogString(const wxChar *szString, time_t WXUNUSED(t))
404 (*m_ostr) << wxConv_libc.cWX2MB(szString) << endl << flush;
406 #endif // wxUSE_STD_IOSTREAM
410 // ----------------------------------------------------------------------------
411 // wxLogTextCtrl implementation
412 // ----------------------------------------------------------------------------
414 #if wxUSE_STD_IOSTREAM
415 wxLogTextCtrl::wxLogTextCtrl(wxTextCtrl *pTextCtrl)
416 #if !defined(NO_TEXT_WINDOW_STREAM)
417 : wxLogStream(new ostream(pTextCtrl))
422 wxLogTextCtrl::~wxLogTextCtrl()
426 #endif // wxUSE_STD_IOSTREAM
428 // ----------------------------------------------------------------------------
429 // wxLogGui implementation (FIXME MT-unsafe)
430 // ----------------------------------------------------------------------------
437 void wxLogGui::Clear()
439 m_bErrors = m_bWarnings = FALSE;
444 void wxLogGui::Flush()
446 if ( !m_bHasMessages )
449 // do it right now to block any new calls to Flush() while we're here
450 m_bHasMessages = FALSE;
452 // concatenate all strings (but not too many to not overfill the msg box)
455 nMsgCount = m_aMessages.Count();
457 // start from the most recent message
458 for ( size_t n = nMsgCount; n > 0; n-- ) {
459 // for Windows strings longer than this value are wrapped (NT 4.0)
460 const size_t nMsgLineWidth = 156;
462 nLines += (m_aMessages[n - 1].Len() + nMsgLineWidth - 1) / nMsgLineWidth;
464 if ( nLines > 25 ) // don't put too many lines in message box
467 str << m_aMessages[n - 1] << _T("\n");
477 else if ( m_bWarnings ) {
478 title = _("Warning");
479 style = wxICON_EXCLAMATION;
482 title = _("Information");
483 style = wxICON_INFORMATION;
486 wxMessageBox(str, title, wxOK | style);
488 // no undisplayed messages whatsoever
492 // the default behaviour is to discard all informational messages if there
493 // are any errors/warnings.
494 void wxLogGui::DoLog(wxLogLevel level, const wxChar *szString, time_t t)
501 m_aMessages.Add(szString);
502 m_aTimes.Add((long)t);
503 m_bHasMessages = TRUE;
509 // find the top window and set it's status text if it has any
510 wxFrame *pFrame = gs_pFrame;
511 if ( pFrame == NULL ) {
512 wxWindow *pWin = wxTheApp->GetTopWindow();
513 if ( pWin != NULL && pWin->IsKindOf(CLASSINFO(wxFrame)) ) {
514 pFrame = (wxFrame *)pWin;
518 if ( pFrame != NULL )
519 pFrame->SetStatusText(szString);
528 // don't prepend debug/trace here: it goes to the
529 // debug window anyhow, but do put a timestamp
530 OutputDebugString(wxString(szString) + _T("\n\r"));
532 // send them to stderr
533 wxFprintf(stderr, _T("%s: %s\n"),
534 level == wxLOG_Trace ? _T("Trace") : _T("Debug"),
539 #endif // __WXDEBUG__
543 case wxLOG_FatalError:
544 // show this one immediately
545 wxMessageBox(szString, _("Fatal error"), wxICON_HAND);
549 // discard earlier informational messages if this is the 1st
550 // error because they might not make sense any more
554 m_bHasMessages = TRUE;
561 // for the warning we don't discard the info messages
565 m_aMessages.Add(szString);
566 m_aTimes.Add((long)t);
571 // ----------------------------------------------------------------------------
572 // wxLogWindow and wxLogFrame implementation
573 // ----------------------------------------------------------------------------
577 class wxLogFrame : public wxFrame
581 wxLogFrame(wxFrame *pParent, wxLogWindow *log, const wxChar *szTitle);
582 virtual ~wxLogFrame();
585 void OnClose(wxCommandEvent& event);
586 void OnCloseWindow(wxCloseEvent& event);
587 void OnSave (wxCommandEvent& event);
588 void OnClear(wxCommandEvent& event);
590 void OnIdle(wxIdleEvent&);
593 wxTextCtrl *TextCtrl() const { return m_pTextCtrl; }
603 // instead of closing just hide the window to be able to Show() it later
604 void DoClose() { Show(FALSE); }
606 wxTextCtrl *m_pTextCtrl;
609 DECLARE_EVENT_TABLE()
612 BEGIN_EVENT_TABLE(wxLogFrame, wxFrame)
613 // wxLogWindow menu events
614 EVT_MENU(Menu_Close, wxLogFrame::OnClose)
615 EVT_MENU(Menu_Save, wxLogFrame::OnSave)
616 EVT_MENU(Menu_Clear, wxLogFrame::OnClear)
618 EVT_CLOSE(wxLogFrame::OnCloseWindow)
621 wxLogFrame::wxLogFrame(wxFrame *pParent, wxLogWindow *log, const wxChar *szTitle)
622 : wxFrame(pParent, -1, szTitle)
626 m_pTextCtrl = new wxTextCtrl(this, -1, wxEmptyString, wxDefaultPosition,
633 wxMenuBar *pMenuBar = new wxMenuBar;
634 wxMenu *pMenu = new wxMenu;
635 pMenu->Append(Menu_Save, _("&Save..."), _("Save log contents to file"));
636 pMenu->Append(Menu_Clear, _("C&lear"), _("Clear the log contents"));
637 pMenu->AppendSeparator();
638 pMenu->Append(Menu_Close, _("&Close"), _("Close this window"));
639 pMenuBar->Append(pMenu, _("&Log"));
640 SetMenuBar(pMenuBar);
642 // status bar for menu prompts
645 m_log->OnFrameCreate(this);
648 void wxLogFrame::OnClose(wxCommandEvent& WXUNUSED(event))
653 void wxLogFrame::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
658 void wxLogFrame::OnSave(wxCommandEvent& WXUNUSED(event))
662 const wxChar *szFileName = wxSaveFileSelector(_T("log"), _T("txt"), _T("log.txt"));
663 if ( szFileName == NULL ) {
672 if ( wxFile::Exists(szFileName) ) {
673 bool bAppend = FALSE;
675 strMsg.Printf(_("Append log to file '%s' "
676 "(choosing [No] will overwrite it)?"), szFileName);
677 switch ( wxMessageBox(strMsg, _("Question"), wxYES_NO | wxCANCEL) ) {
690 wxFAIL_MSG(_("invalid message box return value"));
694 bOk = file.Open(szFileName, wxFile::write_append);
697 bOk = file.Create(szFileName, TRUE /* overwrite */);
701 bOk = file.Create(szFileName);
704 // retrieve text and save it
705 // -------------------------
706 int nLines = m_pTextCtrl->GetNumberOfLines();
707 for ( int nLine = 0; bOk && nLine < nLines; nLine++ ) {
708 bOk = file.Write(m_pTextCtrl->GetLineText(nLine) +
709 // we're not going to pull in the whole wxTextFile if all we need is this...
712 #else // !wxUSE_TEXTFILE
714 #endif // wxUSE_TEXTFILE
722 wxLogError(_("Can't save log contents to file."));
725 wxLogStatus(this, _("Log saved to the file '%s'."), szFileName);
729 void wxLogFrame::OnClear(wxCommandEvent& WXUNUSED(event))
731 m_pTextCtrl->Clear();
734 wxLogFrame::~wxLogFrame()
736 m_log->OnFrameDelete(this);
741 wxLogWindow::wxLogWindow(wxFrame *pParent,
742 const wxChar *szTitle,
746 m_bPassMessages = bDoPass;
748 m_pLogFrame = new wxLogFrame(pParent, this, szTitle);
749 m_pOldLog = wxLog::SetActiveTarget(this);
752 m_pLogFrame->Show(TRUE);
755 void wxLogWindow::Show(bool bShow)
757 m_pLogFrame->Show(bShow);
760 void wxLogWindow::Flush()
762 if ( m_pOldLog != NULL )
765 m_bHasMessages = FALSE;
768 void wxLogWindow::DoLog(wxLogLevel level, const wxChar *szString, time_t t)
770 // first let the previous logger show it
771 if ( m_pOldLog != NULL && m_bPassMessages ) {
772 // FIXME why can't we access protected wxLog method from here (we derive
773 // from wxLog)? gcc gives "DoLog is protected in this context", what
774 // does this mean? Anyhow, the cast is harmless and let's us do what
776 ((wxLogWindow *)m_pOldLog)->DoLog(level, szString, t);
782 // by default, these messages are ignored by wxLog, so process
784 if ( !wxIsEmpty(szString) )
787 str << _("Status: ") << szString;
792 // don't put trace messages in the text window for 2 reasons:
793 // 1) there are too many of them
794 // 2) they may provoke other trace messages thus sending a program
795 // into an infinite loop
800 // and this will format it nicely and call our DoLogString()
801 wxLog::DoLog(level, szString, t);
805 m_bHasMessages = TRUE;
808 void wxLogWindow::DoLogString(const wxChar *szString, time_t WXUNUSED(t))
810 // put the text into our window
811 wxTextCtrl *pText = m_pLogFrame->TextCtrl();
813 // remove selection (WriteText is in fact ReplaceSelection)
815 long nLen = pText->GetLastPosition();
816 pText->SetSelection(nLen, nLen);
819 pText->WriteText(szString);
820 pText->WriteText(_T("\n")); // "\n" ok here (_not_ "\r\n")
822 // TODO ensure that the line can be seen
825 wxFrame *wxLogWindow::GetFrame() const
830 void wxLogWindow::OnFrameCreate(wxFrame * WXUNUSED(frame))
834 void wxLogWindow::OnFrameDelete(wxFrame * WXUNUSED(frame))
836 m_pLogFrame = (wxLogFrame *)NULL;
839 wxLogWindow::~wxLogWindow()
843 // may be NULL if log frame already auto destroyed itself
849 // ============================================================================
850 // Global functions/variables
851 // ============================================================================
853 // ----------------------------------------------------------------------------
855 // ----------------------------------------------------------------------------
857 wxLog *wxLog::ms_pLogger = (wxLog *)NULL;
858 bool wxLog::ms_doLog = TRUE;
859 bool wxLog::ms_bAutoCreate = TRUE;
860 wxTraceMask wxLog::ms_ulTraceMask = (wxTraceMask)0;
861 wxArrayString wxLog::ms_aTraceMasks;
863 // ----------------------------------------------------------------------------
864 // stdout error logging helper
865 // ----------------------------------------------------------------------------
867 // helper function: wraps the message and justifies it under given position
868 // (looks more pretty on the terminal). Also adds newline at the end.
870 // TODO this is now disabled until I find a portable way of determining the
871 // terminal window size (ok, I found it but does anybody really cares?)
872 #ifdef LOG_PRETTY_WRAP
873 static void wxLogWrap(FILE *f, const char *pszPrefix, const char *psz)
875 size_t nMax = 80; // FIXME
876 size_t nStart = strlen(pszPrefix);
880 while ( *psz != '\0' ) {
881 for ( n = nStart; (n < nMax) && (*psz != '\0'); n++ )
885 if ( *psz != '\0' ) {
887 for ( n = 0; n < nStart; n++ )
890 // as we wrapped, squeeze all white space
891 while ( isspace(*psz) )
898 #endif //LOG_PRETTY_WRAP
900 // ----------------------------------------------------------------------------
901 // error code/error message retrieval functions
902 // ----------------------------------------------------------------------------
904 // get error code from syste
905 unsigned long wxSysErrorCode()
909 return ::GetLastError();
911 // TODO what to do on Windows 3.1?
919 // get error message from system
920 const wxChar *wxSysErrorMsg(unsigned long nErrCode)
923 nErrCode = wxSysErrorCode();
927 static wxChar s_szBuf[LOG_BUFFER_SIZE / 2];
929 // get error message from system
931 FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
933 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
937 // copy it to our buffer and free memory
938 wxStrncpy(s_szBuf, (const wxChar *)lpMsgBuf, WXSIZEOF(s_szBuf) - 1);
939 s_szBuf[WXSIZEOF(s_szBuf) - 1] = _T('\0');
942 // returned string is capitalized and ended with '\r\n' - bad
943 s_szBuf[0] = (wxChar)wxTolower(s_szBuf[0]);
944 size_t len = wxStrlen(s_szBuf);
947 if ( s_szBuf[len - 2] == _T('\r') )
948 s_szBuf[len - 2] = _T('\0');
958 static wxChar s_szBuf[LOG_BUFFER_SIZE / 2];
959 wxConv_libc.MB2WC(s_szBuf, strerror(nErrCode), WXSIZEOF(s_szBuf) -1);
962 return strerror(nErrCode);
967 // ----------------------------------------------------------------------------
969 // ----------------------------------------------------------------------------
973 // break into the debugger
978 #elif defined(__WXMAC__)
984 #elif defined(__UNIX__)
991 // this function is called when an assert fails
992 void wxOnAssert(const wxChar *szFile, int nLine, const wxChar *szMsg)
994 // this variable can be set to true to suppress "assert failure" messages
995 static bool s_bNoAsserts = FALSE;
996 static bool s_bInAssert = FALSE; // FIXME MT-unsafe
999 // He-e-e-e-elp!! we're trapped in endless loop
1002 s_bInAssert = FALSE;
1009 wxChar szBuf[LOG_BUFFER_SIZE];
1011 // make life easier for people using VC++ IDE: clicking on the message
1012 // will take us immediately to the place of the failed assert
1014 wxSprintf(szBuf, _T("%s(%d): assert failed"), szFile, nLine);
1016 // make the error message more clear for all the others
1017 wxSprintf(szBuf, _T("Assert failed in file %s at line %d"), szFile, nLine);
1020 if ( szMsg != NULL ) {
1021 wxStrcat(szBuf, _T(": "));
1022 wxStrcat(szBuf, szMsg);
1025 wxStrcat(szBuf, _T("."));
1028 if ( !s_bNoAsserts ) {
1029 // send it to the normal log destination
1035 // this message is intentionally not translated - it is for
1037 wxStrcat(szBuf, _T("\nDo you want to stop the program?"
1038 "\nYou can also choose [Cancel] to suppress "
1039 "further warnings."));
1041 switch ( wxMessageBox(szBuf, _("Debug"),
1042 wxYES_NO | wxCANCEL | wxICON_STOP ) ) {
1048 s_bNoAsserts = TRUE;
1051 //case wxNO: nothing to do
1056 s_bInAssert = FALSE;