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[wxWidgets.git] / src / common / appbase.cpp
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1///////////////////////////////////////////////////////////////////////////////
2// Name: common/base/appbase.cpp
3// Purpose: implements wxAppConsole 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>
0a53b9b8 9// License: wxWindows license
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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
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28 #include "wx/app.h"
29 #include "wx/intl.h"
910426ee 30 #include "wx/list.h"
86f8d1a8 31 #include "wx/log.h"
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32#endif //WX_PRECOMP
33
56fae7b8 34#include "wx/utils.h"
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35#include "wx/apptrait.h"
36#include "wx/cmdline.h"
37#include "wx/confbase.h"
ce39c39e 38#include "wx/filename.h"
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39#include "wx/msgout.h"
40#include "wx/tokenzr.h"
41
42#if !defined(__WXMSW__) || defined(__WXMICROWIN__)
43 #include <signal.h> // for SIGTRAP used by wxTrap()
44#endif //Win/Unix
45
82ef81ed 46#if defined(__WXMSW__)
6ed5d6cb 47 #include "wx/msw/wrapwin.h" // includes windows.h for MessageBox()
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48#endif
49
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50#if wxUSE_FONTMAP
51 #include "wx/fontmap.h"
52#endif // wxUSE_FONTMAP
53
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54#if defined(__DARWIN__) && defined(_MSL_USING_MW_C_HEADERS) && _MSL_USING_MW_C_HEADERS
55 // For MacTypes.h for Debugger function
56 #include <CoreFoundation/CFBase.h>
57#endif
58
e2478fde 59#if defined(__WXMAC__)
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60 // VZ: MacTypes.h is enough under Mac OS X (where I could test it) but
61 // I don't know which headers are needed under earlier systems so
62 // include everything when in doubt
63 #ifdef __DARWIN__
64 #include "MacTypes.h"
65 #else
66 #include "wx/mac/private.h" // includes mac headers
67 #endif
68#endif // __WXMAC__
e2478fde 69
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70#ifdef __WXDEBUG__
71 #ifdef wxUSE_STACKWALKER
72 #include "wx/stackwalk.h"
73 #endif // wxUSE_STACKWALKER
74#endif // __WXDEBUG__
75
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76// ----------------------------------------------------------------------------
77// private functions prototypes
78// ----------------------------------------------------------------------------
79
80#ifdef __WXDEBUG__
81 // really just show the assert dialog
82 static bool DoShowAssertDialog(const wxString& msg);
83
84 // prepare for showing the assert dialog, use the given traits or
85 // DoShowAssertDialog() as last fallback to really show it
86 static
87 void ShowAssertDialog(const wxChar *szFile,
88 int nLine,
89 const wxChar *szCond,
90 const wxChar *szMsg,
91 wxAppTraits *traits = NULL);
92
93 // turn on the trace masks specified in the env variable WXTRACE
94 static void LINKAGEMODE SetTraceMasks();
95#endif // __WXDEBUG__
96
97// ----------------------------------------------------------------------------
98// global vars
99// ----------------------------------------------------------------------------
100
7cafd224 101wxAppConsole *wxAppConsole::ms_appInstance = NULL;
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102
103wxAppInitializerFunction wxAppConsole::ms_appInitFn = NULL;
104
105// ============================================================================
106// wxAppConsole implementation
107// ============================================================================
108
109// ----------------------------------------------------------------------------
110// ctor/dtor
111// ----------------------------------------------------------------------------
112
113wxAppConsole::wxAppConsole()
114{
115 m_traits = NULL;
116
7cafd224 117 ms_appInstance = this;
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118
119#ifdef __WXDEBUG__
120 SetTraceMasks();
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121#if wxUSE_UNICODE
122 // In unicode mode the SetTraceMasks call can cause an apptraits to be
123 // created, but since we are still in the constructor the wrong kind will
124 // be created for GUI apps. Destroy it so it can be created again later.
125 delete m_traits;
126 m_traits = NULL;
127#endif
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128#endif
129}
130
131wxAppConsole::~wxAppConsole()
132{
133 delete m_traits;
134}
135
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136// ----------------------------------------------------------------------------
137// initilization/cleanup
138// ----------------------------------------------------------------------------
139
05e2b077 140bool wxAppConsole::Initialize(int& argc, wxChar **argv)
94826170 141{
4629016d 142#if wxUSE_LOG
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143 // If some code logged something before wxApp instance was created,
144 // wxLogStderr was set as the target. Undo it here by destroying the
145 // current target. It will be re-created next time logging is needed, but
146 // this time wxAppTraits will be used:
147 delete wxLog::SetActiveTarget(NULL);
00aa0289 148#endif // wxUSE_LOG
4629016d 149
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150 // remember the command line arguments
151 this->argc = argc;
152 this->argv = argv;
153
4055ed82 154#ifndef __WXPALMOS__
d546eba9 155 if ( m_appName.empty() && argv )
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156 {
157 // the application name is, by default, the name of its executable file
94826170 158 wxFileName::SplitPath(argv[0], NULL, &m_appName, NULL);
94826170 159 }
ffecfa5a 160#endif
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161
162 return true;
163}
164
165void wxAppConsole::CleanUp()
166{
167}
168
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169// ----------------------------------------------------------------------------
170// OnXXX() callbacks
171// ----------------------------------------------------------------------------
172
173bool wxAppConsole::OnInit()
174{
175#if wxUSE_CMDLINE_PARSER
176 wxCmdLineParser parser(argc, argv);
177
178 OnInitCmdLine(parser);
179
180 bool cont;
4629016d 181 switch ( parser.Parse(false /* don't show usage */) )
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182 {
183 case -1:
184 cont = OnCmdLineHelp(parser);
185 break;
186
187 case 0:
188 cont = OnCmdLineParsed(parser);
189 break;
190
191 default:
192 cont = OnCmdLineError(parser);
193 break;
194 }
195
196 if ( !cont )
4629016d 197 return false;
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198#endif // wxUSE_CMDLINE_PARSER
199
4629016d 200 return true;
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201}
202
203int wxAppConsole::OnExit()
204{
205#if wxUSE_CONFIG
206 // delete the config object if any (don't use Get() here, but Set()
207 // because Get() could create a new config object)
208 delete wxConfigBase::Set((wxConfigBase *) NULL);
209#endif // wxUSE_CONFIG
210
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211 // use Set(NULL) and not Get() to avoid creating a message output object on
212 // demand when we just want to delete it
213 delete wxMessageOutput::Set(NULL);
214
215 return 0;
216}
217
218void wxAppConsole::Exit()
219{
220 exit(-1);
221}
222
223// ----------------------------------------------------------------------------
224// traits stuff
225// ----------------------------------------------------------------------------
226
227wxAppTraits *wxAppConsole::CreateTraits()
228{
7843d11b 229 return new wxConsoleAppTraits;
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230}
231
232wxAppTraits *wxAppConsole::GetTraits()
233{
234 // FIXME-MT: protect this with a CS?
235 if ( !m_traits )
236 {
237 m_traits = CreateTraits();
238
239 wxASSERT_MSG( m_traits, _T("wxApp::CreateTraits() failed?") );
240 }
241
242 return m_traits;
243}
244
245// we must implement CreateXXX() in wxApp itself for backwards compatibility
246#if WXWIN_COMPATIBILITY_2_4
247
248#if wxUSE_LOG
249
250wxLog *wxAppConsole::CreateLogTarget()
251{
252 wxAppTraits *traits = GetTraits();
253 return traits ? traits->CreateLogTarget() : NULL;
254}
255
256#endif // wxUSE_LOG
257
258wxMessageOutput *wxAppConsole::CreateMessageOutput()
259{
260 wxAppTraits *traits = GetTraits();
261 return traits ? traits->CreateMessageOutput() : NULL;
262}
263
264#endif // WXWIN_COMPATIBILITY_2_4
265
266// ----------------------------------------------------------------------------
267// event processing
268// ----------------------------------------------------------------------------
269
270void wxAppConsole::ProcessPendingEvents()
271{
de4de64f 272#if wxUSE_THREADS
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273 if ( !wxPendingEventsLocker )
274 return;
7fdfc5b3 275#endif
f54043c2 276
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277 // ensure that we're the only thread to modify the pending events list
278 wxENTER_CRIT_SECT( *wxPendingEventsLocker );
279
280 if ( !wxPendingEvents )
281 {
282 wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
283 return;
284 }
285
286 // iterate until the list becomes empty
df5168c4 287 wxList::compatibility_iterator node = wxPendingEvents->GetFirst();
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288 while (node)
289 {
290 wxEvtHandler *handler = (wxEvtHandler *)node->GetData();
df5168c4 291 wxPendingEvents->Erase(node);
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292
293 // In ProcessPendingEvents(), new handlers might be add
294 // and we can safely leave the critical section here.
295 wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
de4de64f 296
e2478fde 297 handler->ProcessPendingEvents();
de4de64f 298
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299 wxENTER_CRIT_SECT( *wxPendingEventsLocker );
300
301 node = wxPendingEvents->GetFirst();
302 }
303
304 wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
305}
306
307int wxAppConsole::FilterEvent(wxEvent& WXUNUSED(event))
308{
309 // process the events normally by default
310 return -1;
311}
312
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313// ----------------------------------------------------------------------------
314// exception handling
315// ----------------------------------------------------------------------------
316
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317#if wxUSE_EXCEPTIONS
318
319void
320wxAppConsole::HandleEvent(wxEvtHandler *handler,
321 wxEventFunction func,
322 wxEvent& event) const
323{
324 // by default, simply call the handler
325 (handler->*func)(event);
326}
327
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328bool
329wxAppConsole::OnExceptionInMainLoop()
330{
331 throw;
332
333 // some compilers are too stupid to know that we never return after throw
334#if defined(__DMC__) || (defined(_MSC_VER) && _MSC_VER < 1200)
335 return false;
336#endif
337}
338
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339#endif // wxUSE_EXCEPTIONS
340
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341// ----------------------------------------------------------------------------
342// cmd line parsing
343// ----------------------------------------------------------------------------
344
345#if wxUSE_CMDLINE_PARSER
346
347#define OPTION_VERBOSE _T("verbose")
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348
349void wxAppConsole::OnInitCmdLine(wxCmdLineParser& parser)
350{
351 // the standard command line options
352 static const wxCmdLineEntryDesc cmdLineDesc[] =
353 {
354 {
355 wxCMD_LINE_SWITCH,
356 _T("h"),
357 _T("help"),
358 gettext_noop("show this help message"),
359 wxCMD_LINE_VAL_NONE,
360 wxCMD_LINE_OPTION_HELP
361 },
362
363#if wxUSE_LOG
364 {
365 wxCMD_LINE_SWITCH,
b494c48b 366 wxEmptyString,
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367 OPTION_VERBOSE,
368 gettext_noop("generate verbose log messages"),
369 wxCMD_LINE_VAL_NONE,
370 0x0
371 },
372#endif // wxUSE_LOG
373
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374 // terminator
375 {
376 wxCMD_LINE_NONE,
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377 wxEmptyString,
378 wxEmptyString,
379 wxEmptyString,
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380 wxCMD_LINE_VAL_NONE,
381 0x0
382 }
383 };
384
385 parser.SetDesc(cmdLineDesc);
386}
387
388bool wxAppConsole::OnCmdLineParsed(wxCmdLineParser& parser)
389{
390#if wxUSE_LOG
391 if ( parser.Found(OPTION_VERBOSE) )
392 {
fa0d3447 393 wxLog::SetVerbose(true);
e2478fde 394 }
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395#else
396 wxUnusedVar(parser);
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397#endif // wxUSE_LOG
398
fa0d3447 399 return true;
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400}
401
402bool wxAppConsole::OnCmdLineHelp(wxCmdLineParser& parser)
403{
404 parser.Usage();
405
4629016d 406 return false;
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407}
408
409bool wxAppConsole::OnCmdLineError(wxCmdLineParser& parser)
410{
411 parser.Usage();
412
4629016d 413 return false;
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414}
415
416#endif // wxUSE_CMDLINE_PARSER
417
418// ----------------------------------------------------------------------------
419// debugging support
420// ----------------------------------------------------------------------------
421
422/* static */
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423bool wxAppConsole::CheckBuildOptions(const char *optionsSignature,
424 const char *componentName)
e2478fde 425{
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426#if 0 // can't use wxLogTrace, not up and running yet
427 printf("checking build options object '%s' (ptr %p) in '%s'\n",
428 optionsSignature, optionsSignature, componentName);
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429#endif
430
2a7c7605 431 if ( strcmp(optionsSignature, WX_BUILD_OPTIONS_SIGNATURE) != 0 )
e2478fde 432 {
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433 wxString lib = wxString::FromAscii(WX_BUILD_OPTIONS_SIGNATURE);
434 wxString prog = wxString::FromAscii(optionsSignature);
435 wxString progName = wxString::FromAscii(componentName);
e2478fde 436 wxString msg;
2dbc444a 437
b880adec 438 msg.Printf(_T("Mismatch between the program and library build versions detected.\nThe library used %s,\nand %s used %s."),
2a7c7605 439 lib.c_str(), progName.c_str(), prog.c_str());
2dbc444a 440
095d49f2 441 wxLogFatalError(msg.c_str());
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442
443 // normally wxLogFatalError doesn't return
4629016d 444 return false;
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445 }
446#undef wxCMP
447
4629016d 448 return true;
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449}
450
451#ifdef __WXDEBUG__
452
453void wxAppConsole::OnAssert(const wxChar *file,
454 int line,
455 const wxChar *cond,
456 const wxChar *msg)
457{
49d3b775 458 ShowAssertDialog(file, line, cond, msg, GetTraits());
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459}
460
461#endif // __WXDEBUG__
462
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463#if WXWIN_COMPATIBILITY_2_4
464
465bool wxAppConsole::CheckBuildOptions(const wxBuildOptions& buildOptions)
466{
467 return CheckBuildOptions(buildOptions.m_signature, "your program");
468}
469
470#endif
471
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472// ============================================================================
473// other classes implementations
474// ============================================================================
475
476// ----------------------------------------------------------------------------
477// wxConsoleAppTraitsBase
478// ----------------------------------------------------------------------------
479
480#if wxUSE_LOG
481
482wxLog *wxConsoleAppTraitsBase::CreateLogTarget()
483{
484 return new wxLogStderr;
485}
486
487#endif // wxUSE_LOG
488
489wxMessageOutput *wxConsoleAppTraitsBase::CreateMessageOutput()
490{
491 return new wxMessageOutputStderr;
492}
493
494#if wxUSE_FONTMAP
495
496wxFontMapper *wxConsoleAppTraitsBase::CreateFontMapper()
497{
498 return (wxFontMapper *)new wxFontMapperBase;
499}
500
501#endif // wxUSE_FONTMAP
502
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503wxRendererNative *wxConsoleAppTraitsBase::CreateRenderer()
504{
505 // console applications don't use renderers
506 return NULL;
507}
508
8df6de97 509#ifdef __WXDEBUG__
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510bool wxConsoleAppTraitsBase::ShowAssertDialog(const wxString& msg)
511{
512 return wxAppTraitsBase::ShowAssertDialog(msg);
513}
8df6de97 514#endif
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515
516bool wxConsoleAppTraitsBase::HasStderr()
517{
518 // console applications always have stderr, even under Mac/Windows
519 return true;
520}
521
522void wxConsoleAppTraitsBase::ScheduleForDestroy(wxObject *object)
523{
524 delete object;
525}
526
527void wxConsoleAppTraitsBase::RemoveFromPendingDelete(wxObject * WXUNUSED(object))
528{
529 // nothing to do
530}
2dbc444a 531
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532#if wxUSE_SOCKETS
533GSocketGUIFunctionsTable* wxConsoleAppTraitsBase::GetSocketGUIFunctionsTable()
534{
535 return NULL;
536}
537#endif
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538
539// ----------------------------------------------------------------------------
540// wxAppTraits
541// ----------------------------------------------------------------------------
542
543#ifdef __WXDEBUG__
544
545bool wxAppTraitsBase::ShowAssertDialog(const wxString& msg)
546{
547 return DoShowAssertDialog(msg);
548}
549
550#endif // __WXDEBUG__
551
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552// ============================================================================
553// global functions implementation
554// ============================================================================
555
556void wxExit()
557{
558 if ( wxTheApp )
559 {
560 wxTheApp->Exit();
561 }
562 else
563 {
564 // what else can we do?
565 exit(-1);
566 }
567}
568
569void wxWakeUpIdle()
570{
571 if ( wxTheApp )
572 {
573 wxTheApp->WakeUpIdle();
574 }
575 //else: do nothing, what can we do?
576}
577
578#ifdef __WXDEBUG__
579
580// wxASSERT() helper
581bool wxAssertIsEqual(int x, int y)
582{
583 return x == y;
584}
585
586// break into the debugger
587void wxTrap()
588{
589#if defined(__WXMSW__) && !defined(__WXMICROWIN__)
590 DebugBreak();
591#elif defined(__WXMAC__) && !defined(__DARWIN__)
592 #if __powerc
593 Debugger();
594 #else
595 SysBreak();
596 #endif
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597#elif defined(_MSL_USING_MW_C_HEADERS) && _MSL_USING_MW_C_HEADERS
598 Debugger();
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599#elif defined(__UNIX__)
600 raise(SIGTRAP);
601#else
602 // TODO
603#endif // Win/Unix
604}
605
606void wxAssert(int cond,
607 const wxChar *szFile,
608 int nLine,
609 const wxChar *szCond,
2dbc444a 610 const wxChar *szMsg)
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611{
612 if ( !cond )
613 wxOnAssert(szFile, nLine, szCond, szMsg);
614}
615
616// this function is called when an assert fails
617void wxOnAssert(const wxChar *szFile,
618 int nLine,
619 const wxChar *szCond,
620 const wxChar *szMsg)
621{
622 // FIXME MT-unsafe
4629016d 623 static bool s_bInAssert = false;
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624
625 if ( s_bInAssert )
626 {
627 // He-e-e-e-elp!! we're trapped in endless loop
628 wxTrap();
629
4629016d 630 s_bInAssert = false;
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631
632 return;
633 }
634
4629016d 635 s_bInAssert = true;
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636
637 if ( !wxTheApp )
638 {
639 // by default, show the assert dialog box -- we can't customize this
640 // behaviour
641 ShowAssertDialog(szFile, nLine, szCond, szMsg);
642 }
643 else
644 {
645 // let the app process it as it wants
646 wxTheApp->OnAssert(szFile, nLine, szCond, szMsg);
647 }
648
4629016d 649 s_bInAssert = false;
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650}
651
652#endif // __WXDEBUG__
653
654// ============================================================================
655// private functions implementation
656// ============================================================================
657
658#ifdef __WXDEBUG__
659
660static void LINKAGEMODE SetTraceMasks()
661{
662#if wxUSE_LOG
663 wxString mask;
664 if ( wxGetEnv(wxT("WXTRACE"), &mask) )
665 {
666 wxStringTokenizer tkn(mask, wxT(",;:"));
667 while ( tkn.HasMoreTokens() )
668 wxLog::AddTraceMask(tkn.GetNextToken());
669 }
670#endif // wxUSE_LOG
671}
672
673bool DoShowAssertDialog(const wxString& msg)
674{
675 // under MSW we can show the dialog even in the console mode
676#if defined(__WXMSW__) && !defined(__WXMICROWIN__)
677 wxString msgDlg(msg);
678
679 // this message is intentionally not translated -- it is for
680 // developpers only
681 msgDlg += wxT("\nDo you want to stop the program?\n")
682 wxT("You can also choose [Cancel] to suppress ")
683 wxT("further warnings.");
684
77ffb593 685 switch ( ::MessageBox(NULL, msgDlg, _T("wxWidgets Debug Alert"),
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686 MB_YESNOCANCEL | MB_ICONSTOP ) )
687 {
688 case IDYES:
689 wxTrap();
690 break;
691
692 case IDCANCEL:
693 // stop the asserts
694 return true;
695
696 //case IDNO: nothing to do
697 }
698#else // !__WXMSW__
699 wxFprintf(stderr, wxT("%s\n"), msg.c_str());
700 fflush(stderr);
701
702 // TODO: ask the user to enter "Y" or "N" on the console?
703 wxTrap();
704#endif // __WXMSW__/!__WXMSW__
705
706 // continue with the asserts
707 return false;
708}
709
710// show the assert modal dialog
711static
712void ShowAssertDialog(const wxChar *szFile,
713 int nLine,
714 const wxChar *szCond,
715 const wxChar *szMsg,
716 wxAppTraits *traits)
717{
718 // this variable can be set to true to suppress "assert failure" messages
4629016d 719 static bool s_bNoAsserts = false;
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720
721 wxString msg;
722 msg.reserve(2048);
723
724 // make life easier for people using VC++ IDE by using this format: like
725 // this, clicking on the message will take us immediately to the place of
726 // the failed assert
727 msg.Printf(wxT("%s(%d): assert \"%s\" failed"), szFile, nLine, szCond);
728
729 if ( szMsg )
730 {
731 msg << _T(": ") << szMsg;
732 }
733 else // no message given
734 {
735 msg << _T('.');
736 }
737
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738#if wxUSE_STACKWALKER
739 class StackDump : public wxStackWalker
740 {
741 public:
742 StackDump() { }
743
744 const wxString& GetStackTrace() const { return m_stackTrace; }
745
746 protected:
747 virtual void OnStackFrame(const wxStackFrame& frame)
748 {
749 m_stackTrace << wxString::Format(_T("[%02d] "), frame.GetLevel());
750
751 wxString name = frame.GetName();
752 if ( !name.empty() )
753 {
754 m_stackTrace << wxString::Format(_T("%-40s"), name.c_str());
755 }
756 else
757 {
758 m_stackTrace << wxString::Format
759 (
760 _T("0x%08lx"),
761 (unsigned long)frame.GetAddress()
762 );
763 }
764
765 if ( frame.HasSourceLocation() )
766 {
767 m_stackTrace << _T('\t')
768 << frame.GetFileName()
769 << _T(':')
770 << frame.GetLine();
771 }
772
773 m_stackTrace << _T('\n');
774 }
775
776 private:
777 wxString m_stackTrace;
778 };
779
780 StackDump dump;
781 dump.Walk(5); // don't show OnAssert() call itself
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782 wxString stackTrace = dump.GetStackTrace();
783
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784 // don't show more than maxLines or we could get a dialog too tall to be
785 // shown on screen: 20 should be ok everywhere as even with 15 pixel high
786 // characters it is still only 300 pixels...
787 const int maxLines = 20;
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788 int count = stackTrace.Freq(wxT('\n'));
789 if (count > maxLines)
790 {
791 int i;
792 for (i = 0; i < count - maxLines; i++)
793 stackTrace = stackTrace.BeforeLast(wxT('\n'));
794 }
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795 if ( !stackTrace.empty() )
796 {
797 msg << _T("\n\nCall stack:\n")
798 << stackTrace;
799 }
800#endif // wxUSE_STACKWALKER
801
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802#if wxUSE_THREADS
803 // if we are not in the main thread, output the assert directly and trap
804 // since dialogs cannot be displayed
805 if ( !wxThread::IsMain() )
806 {
807 msg += wxT(" [in child thread]");
808
809#if defined(__WXMSW__) && !defined(__WXMICROWIN__)
810 msg << wxT("\r\n");
811 OutputDebugString(msg );
812#else
813 // send to stderr
814 wxFprintf(stderr, wxT("%s\n"), msg.c_str());
815 fflush(stderr);
816#endif
817 // He-e-e-e-elp!! we're asserting in a child thread
818 wxTrap();
819 }
6c8f8d92 820 else
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821#endif // wxUSE_THREADS
822
823 if ( !s_bNoAsserts )
824 {
825 // send it to the normal log destination
56fae7b8 826 wxLogDebug(_T("%s"), msg.c_str());
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827
828 if ( traits )
829 {
830 // delegate showing assert dialog (if possible) to that class
831 s_bNoAsserts = traits->ShowAssertDialog(msg);
832 }
833 else // no traits object
834 {
835 // fall back to the function of last resort
836 s_bNoAsserts = DoShowAssertDialog(msg);
837 }
838 }
839}
840
841#endif // __WXDEBUG__
842