appbase.cpp

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///////////////////////////////////////////////////////////////////////////////
// Name:        common/base/appbase.cpp
// Purpose:     implements wxAppConsole class
// Author:      Vadim Zeitlin
// Modified by:
// Created:     19.06.2003 (extracted from common/appcmn.cpp)
// RCS-ID:      $Id: appbase.cpp,v 1.61 2005/09/13 14:30:18 VZ Exp $
// Copyright:   (c) 2003 Vadim Zeitlin <[e-mail]>
// License:     wxWindows license
///////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

// for compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/app.h"
    #include "wx/intl.h"
    #include "wx/list.h"
    #include "wx/log.h"
#endif //WX_PRECOMP

#include "wx/utils.h"
#include "wx/apptrait.h"
#include "wx/cmdline.h"
#include "wx/confbase.h"
#include "wx/filename.h"
#include "wx/msgout.h"
#include "wx/tokenzr.h"

#if !defined(__WXMSW__) || defined(__WXMICROWIN__)
  #include  <signal.h>      // for SIGTRAP used by wxTrap()
#endif  //Win/Unix

#if defined(__WXMSW__)
  #include  "wx/msw/wrapwin.h"  // includes windows.h for MessageBox()
#endif

#if wxUSE_FONTMAP
    #include "wx/fontmap.h"
#endif // wxUSE_FONTMAP

#if defined(__DARWIN__) && defined(_MSL_USING_MW_C_HEADERS) && _MSL_USING_MW_C_HEADERS
    // For MacTypes.h for Debugger function
    #include <CoreFoundation/CFBase.h>
#endif

#if defined(__WXMAC__)
    #ifdef __DARWIN__
        #include  <CoreServices/CoreServices.h>
    #else
        #include  "wx/mac/private.h"  // includes mac headers
    #endif
#endif // __WXMAC__

#ifdef __WXDEBUG__
    #if wxUSE_STACKWALKER
        #include "wx/stackwalk.h"
        #ifdef __WXMSW__
            #include "wx/msw/debughlp.h"
        #endif
    #endif // wxUSE_STACKWALKER
#endif // __WXDEBUG__

// wxABI_VERSION can be defined when compiling applications but it should be
// left undefined when compiling the library itself, it is then set to its
// default value in version.h
#if wxABI_VERSION != wxMAJOR_VERSION * 10000 + wxMINOR_VERSION * 100 + 99
#error "wxABI_VERSION should not be defined when compiling the library"
#endif

// ----------------------------------------------------------------------------
// private functions prototypes
// ----------------------------------------------------------------------------

#ifdef __WXDEBUG__
    // really just show the assert dialog
    static bool DoShowAssertDialog(const wxString& msg);

    // prepare for showing the assert dialog, use the given traits or
    // DoShowAssertDialog() as last fallback to really show it
    static
    void ShowAssertDialog(const wxChar *szFile,
                          int nLine,
                          const wxChar *szCond,
                          const wxChar *szMsg,
                          wxAppTraits *traits = NULL);

    // turn on the trace masks specified in the env variable WXTRACE
    static void LINKAGEMODE SetTraceMasks();
#endif // __WXDEBUG__

// ----------------------------------------------------------------------------
// global vars
// ----------------------------------------------------------------------------

wxAppConsole *wxAppConsole::ms_appInstance = NULL;

wxAppInitializerFunction wxAppConsole::ms_appInitFn = NULL;

// ============================================================================
// wxAppConsole implementation
// ============================================================================

// ----------------------------------------------------------------------------
// ctor/dtor
// ----------------------------------------------------------------------------

wxAppConsole::wxAppConsole()
{
    m_traits = NULL;

    ms_appInstance = this;

#ifdef __WXDEBUG__
    SetTraceMasks();
#if wxUSE_UNICODE
    // In unicode mode the SetTraceMasks call can cause an apptraits to be
    // created, but since we are still in the constructor the wrong kind will
    // be created for GUI apps.  Destroy it so it can be created again later.
    delete m_traits;
    m_traits = NULL;
#endif
#endif
}

wxAppConsole::~wxAppConsole()
{
    delete m_traits;
}

// ----------------------------------------------------------------------------
// initilization/cleanup
// ----------------------------------------------------------------------------

bool wxAppConsole::Initialize(int& argcOrig, wxChar **argvOrig)
{
    // remember the command line arguments
    argc = argcOrig;
    argv = argvOrig;

#ifndef __WXPALMOS__
    if ( m_appName.empty() && argv )
    {
        // the application name is, by default, the name of its executable file
        wxFileName::SplitPath(argv[0], NULL, &m_appName, NULL);
    }
#endif

    return true;
}

void wxAppConsole::CleanUp()
{
}

// ----------------------------------------------------------------------------
// OnXXX() callbacks
// ----------------------------------------------------------------------------

bool wxAppConsole::OnInit()
{
#if wxUSE_CMDLINE_PARSER
    wxCmdLineParser parser(argc, argv);

    OnInitCmdLine(parser);

    bool cont;
    switch ( parser.Parse(false /* don't show usage */) )
    {
        case -1:
            cont = OnCmdLineHelp(parser);
            break;

        case 0:
            cont = OnCmdLineParsed(parser);
            break;

        default:
            cont = OnCmdLineError(parser);
            break;
    }

    if ( !cont )
        return false;
#endif // wxUSE_CMDLINE_PARSER

    return true;
}

int wxAppConsole::OnExit()
{
#if wxUSE_CONFIG
    // delete the config object if any (don't use Get() here, but Set()
    // because Get() could create a new config object)
    delete wxConfigBase::Set((wxConfigBase *) NULL);
#endif // wxUSE_CONFIG

    // use Set(NULL) and not Get() to avoid creating a message output object on
    // demand when we just want to delete it
    delete wxMessageOutput::Set(NULL);

    return 0;
}

void wxAppConsole::Exit()
{
    exit(-1);
}

// ----------------------------------------------------------------------------
// traits stuff
// ----------------------------------------------------------------------------

wxAppTraits *wxAppConsole::CreateTraits()
{
    return new wxConsoleAppTraits;
}

wxAppTraits *wxAppConsole::GetTraits()
{
    // FIXME-MT: protect this with a CS?
    if ( !m_traits )
    {
        m_traits = CreateTraits();

        wxASSERT_MSG( m_traits, _T("wxApp::CreateTraits() failed?") );
    }

    return m_traits;
}

// we must implement CreateXXX() in wxApp itself for backwards compatibility
#if WXWIN_COMPATIBILITY_2_4

#if wxUSE_LOG

wxLog *wxAppConsole::CreateLogTarget()
{
    wxAppTraits *traits = GetTraits();
    return traits ? traits->CreateLogTarget() : NULL;
}

#endif // wxUSE_LOG

wxMessageOutput *wxAppConsole::CreateMessageOutput()
{
    wxAppTraits *traits = GetTraits();
    return traits ? traits->CreateMessageOutput() : NULL;
}

#endif // WXWIN_COMPATIBILITY_2_4

// ----------------------------------------------------------------------------
// event processing
// ----------------------------------------------------------------------------

void wxAppConsole::ProcessPendingEvents()
{
#if wxUSE_THREADS
    if ( !wxPendingEventsLocker )
        return;
#endif
    
    // ensure that we're the only thread to modify the pending events list
    wxENTER_CRIT_SECT( *wxPendingEventsLocker );

    if ( !wxPendingEvents )
    {
        wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
        return;
    }

    // iterate until the list becomes empty
    wxList::compatibility_iterator node = wxPendingEvents->GetFirst();
    while (node)
    {
        wxEvtHandler *handler = (wxEvtHandler *)node->GetData();
        wxPendingEvents->Erase(node);

        // In ProcessPendingEvents(), new handlers might be add
        // and we can safely leave the critical section here.
        wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
        
        handler->ProcessPendingEvents();

        wxENTER_CRIT_SECT( *wxPendingEventsLocker );

        node = wxPendingEvents->GetFirst();
    }

    wxLEAVE_CRIT_SECT( *wxPendingEventsLocker );
}

int wxAppConsole::FilterEvent(wxEvent& WXUNUSED(event))
{
    // process the events normally by default
    return -1;
}

// ----------------------------------------------------------------------------
// exception handling
// ----------------------------------------------------------------------------

#if wxUSE_EXCEPTIONS

void
wxAppConsole::HandleEvent(wxEvtHandler *handler,
                          wxEventFunction func,
                          wxEvent& event) const
{
    // by default, simply call the handler
    (handler->*func)(event);
}

bool
wxAppConsole::OnExceptionInMainLoop()
{
    throw;

    // some compilers are too stupid to know that we never return after throw
#if defined(__DMC__) || (defined(_MSC_VER) && _MSC_VER < 1200)
    return false;
#endif
}

#endif // wxUSE_EXCEPTIONS

// ----------------------------------------------------------------------------
// cmd line parsing
// ----------------------------------------------------------------------------

#if wxUSE_CMDLINE_PARSER

#define OPTION_VERBOSE _T("verbose")

void wxAppConsole::OnInitCmdLine(wxCmdLineParser& parser)
{
    // the standard command line options
    static const wxCmdLineEntryDesc cmdLineDesc[] =
    {
        {
            wxCMD_LINE_SWITCH,
            _T("h"),
            _T("help"),
            gettext_noop("show this help message"),
            wxCMD_LINE_VAL_NONE,
            wxCMD_LINE_OPTION_HELP
        },

#if wxUSE_LOG
        {
            wxCMD_LINE_SWITCH,
            wxEmptyString,
            OPTION_VERBOSE,
            gettext_noop("generate verbose log messages"),
            wxCMD_LINE_VAL_NONE,
            0x0
        },
#endif // wxUSE_LOG

        // terminator
        {
            wxCMD_LINE_NONE,
            wxEmptyString,
            wxEmptyString,
            wxEmptyString,
            wxCMD_LINE_VAL_NONE,
            0x0
        }
    };

    parser.SetDesc(cmdLineDesc);
}

bool wxAppConsole::OnCmdLineParsed(wxCmdLineParser& parser)
{
#if wxUSE_LOG
    if ( parser.Found(OPTION_VERBOSE) )
    {
        wxLog::SetVerbose(true);
    }
#else
    wxUnusedVar(parser);
#endif // wxUSE_LOG

    return true;
}

bool wxAppConsole::OnCmdLineHelp(wxCmdLineParser& parser)
{
    parser.Usage();

    return false;
}

bool wxAppConsole::OnCmdLineError(wxCmdLineParser& parser)
{
    parser.Usage();

    return false;
}

#endif // wxUSE_CMDLINE_PARSER

// ----------------------------------------------------------------------------
// debugging support
// ----------------------------------------------------------------------------

/* static */
bool wxAppConsole::CheckBuildOptions(const char *optionsSignature,
                                     const char *componentName)
{