src/gtk/utilsgtk.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/gtk/utilsgtk.cpp
// Purpose:
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

#include "wx/utils.h"

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

#include "wx/apptrait.h"
#include "wx/process.h"
#include "wx/sysopt.h"
#include "wx/unix/execute.h"

#include "wx/gtk/private/timer.h"
#include "wx/evtloop.h"

#include <gtk/gtk.h>
#include <gdk/gdkx.h>

#if wxDEBUG_LEVEL
    #include "wx/gtk/assertdlg_gtk.h"
    #if wxUSE_STACKWALKER
        #include "wx/stackwalk.h"
    #endif // wxUSE_STACKWALKER
#endif // wxDEBUG_LEVEL

#include <stdarg.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>   // for WNOHANG
#include <unistd.h>

#if wxUSE_DETECT_SM
    #include <X11/SM/SMlib.h>

    #include "wx/unix/utilsx11.h"
#endif

//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------

extern GtkWidget *wxGetRootWindow();

//----------------------------------------------------------------------------
// misc.
//----------------------------------------------------------------------------
#ifndef __EMX__
// on OS/2, we use the wxBell from wxBase library

void wxBell()
{
    gdk_beep();
}
#endif

// ----------------------------------------------------------------------------
// display characterstics
// ----------------------------------------------------------------------------

void *wxGetDisplay()
{
    return GDK_DISPLAY();
}

void wxDisplaySize( int *width, int *height )
{
    if (width) *width = gdk_screen_width();
    if (height) *height = gdk_screen_height();
}

void wxDisplaySizeMM( int *width, int *height )
{
    if (width) *width = gdk_screen_width_mm();
    if (height) *height = gdk_screen_height_mm();
}

void wxGetMousePosition( int* x, int* y )
{
    gdk_window_get_pointer(gtk_widget_get_root_window(wxGetRootWindow()), x, y, NULL);
}

bool wxColourDisplay()
{
    return true;
}

int wxDisplayDepth()
{
    return gtk_widget_get_visual(wxGetRootWindow())->depth;
}

wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
{
    return wxGenericFindWindowAtPoint(pt);
}

#if !wxUSE_UNICODE

WXDLLIMPEXP_CORE wxCharBuffer
wxConvertToGTK(const wxString& s, wxFontEncoding enc)
{
    wxWCharBuffer wbuf;
    if ( enc == wxFONTENCODING_SYSTEM || enc == wxFONTENCODING_DEFAULT )
    {
        wbuf = wxConvUI->cMB2WC(s.c_str());
    }
    else // another encoding, use generic conversion class
    {
        wbuf = wxCSConv(enc).cMB2WC(s.c_str());
    }

    if ( !wbuf && !s.empty() )
    {
        // conversion failed, but we still want to show something to the user
        // even if it's going to be wrong it is better than nothing
        //
        // we choose ISO8859-1 here arbitrarily, it's just the most common
        // encoding probably and, also importantly here, conversion from it
        // never fails as it's done internally by wxCSConv
        wbuf = wxCSConv(wxFONTENCODING_ISO8859_1).cMB2WC(s.c_str());
    }

    return wxConvUTF8.cWC2MB(wbuf);
}

WXDLLIMPEXP_CORE wxCharBuffer
wxConvertFromGTK(const wxString& s, wxFontEncoding enc)
{
    // this conversion should never fail as GTK+ always uses UTF-8 internally
    // so there are no complications here
    const wxWCharBuffer wbuf(wxConvUTF8.cMB2WC(s.c_str()));
    if ( enc == wxFONTENCODING_SYSTEM )
        return wxConvUI->cWC2MB(wbuf);

    return wxCSConv(enc).cWC2MB(wbuf);
}

#endif // !wxUSE_UNICODE

// Returns NULL if version is certainly greater or equal than major.minor.micro
// Returns string describing the error if version is lower than
// major.minor.micro OR it cannot be determined and one should not rely on the
// availability of pango version major.minor.micro, nor the non-availability
const gchar *wx_pango_version_check (int major, int minor, int micro)
{
    // NOTE: you don't need to use this macro to check for Pango features
    //       added in pango-1.4 or earlier since GTK 2.4 (our minimum requirement
    //       for GTK lib) required pango 1.4...

#ifdef PANGO_VERSION_MAJOR
    if (!gtk_check_version (2,11,0))
    {
        // GTK+ 2.11 requires Pango >= 1.15.3 and pango_version_check
        // was added in Pango 1.15.2 thus we know for sure the pango lib we're
        // using has the pango_version_check function:
        return pango_version_check (major, minor, micro);
    }

    return "can't check";
#else // !PANGO_VERSION_MAJOR
    wxUnusedVar(major);
    wxUnusedVar(minor);
    wxUnusedVar(micro);

    return "too old headers";
#endif
}


// ----------------------------------------------------------------------------
// subprocess routines
// ----------------------------------------------------------------------------

extern "C" {
static gboolean EndProcessDetector(GIOChannel* source, GIOCondition, void* data)
{
    wxEndProcessData * const
        proc_data = static_cast<wxEndProcessData *>(data);

    // child exited, end waiting
    close(g_io_channel_unix_get_fd(source));

    wxHandleProcessTermination(proc_data);

    // don't call us again!
    return false;
}
}

int wxGUIAppTraits::AddProcessCallback(wxEndProcessData *proc_data, int fd)
{
    GIOChannel* channel = g_io_channel_unix_new(fd);
    GIOCondition cond = GIOCondition(G_IO_IN | G_IO_HUP | G_IO_ERR);
    unsigned id = g_io_add_watch(channel, cond, EndProcessDetector, proc_data);
    g_io_channel_unref(channel);
    return int(id);
}


// ----------------------------------------------------------------------------
// wxPlatformInfo-related
// ----------------------------------------------------------------------------

wxPortId wxGUIAppTraits::GetToolkitVersion(int *verMaj, int *verMin) const
{
    if ( verMaj )
        *verMaj = gtk_major_version;
    if ( verMin )
        *verMin = gtk_minor_version;

    return wxPORT_GTK;
}

#if wxUSE_TIMER

wxTimerImpl *wxGUIAppTraits::CreateTimerImpl(wxTimer *timer)
{
    return new wxGTKTimerImpl(timer);
}

#endif // wxUSE_TIMER

#if wxUSE_DETECT_SM
static wxString GetSM()
{
    wxX11Display dpy;
    if ( !dpy )
        return wxEmptyString;

    char smerr[256];
    char *client_id;
    SmcConn smc_conn = SmcOpenConnection(NULL, NULL,
                                         999, 999,
                                         0 /* mask */, NULL /* callbacks */,
                                         NULL, &client_id,
                                         WXSIZEOF(smerr), smerr);

    if ( !smc_conn )
    {
        wxLogDebug("Failed to connect to session manager: %s", smerr);
        return wxEmptyString;
    }

    char *vendor = SmcVendor(smc_conn);
    wxString ret = wxString::FromAscii( vendor );
    free(vendor);

    SmcCloseConnection(smc_conn, 0, NULL);
    free(client_id);

    return ret;
}
#endif // wxUSE_DETECT_SM


//-----------------------------------------------------------------------------
// wxGUIAppTraits
//-----------------------------------------------------------------------------

wxEventLoopBase *wxGUIAppTraits::CreateEventLoop()
{
    return new wxEventLoop();
}


#if wxUSE_INTL
void wxGUIAppTraits::SetLocale()
{
    gtk_set_locale();
    wxUpdateLocaleIsUtf8();
}
#endif

#if wxDEBUG_LEVEL && wxUSE_STACKWALKER

// private helper class
class StackDump : public wxStackWalker
{
public:
    StackDump(GtkAssertDialog *dlg) { m_dlg=dlg; }

protected:
    virtual void OnStackFrame(const wxStackFrame& frame)
    {
        wxString fncname = frame.GetName();
        wxString fncargs = fncname;

        size_t n = fncname.find(wxT('('));
        if (n != wxString::npos)
        {
            // remove arguments from function name
            fncname.erase(n);

            // remove function name and brackets from arguments
            fncargs = fncargs.substr(n+1, fncargs.length()-n-2);
        }
        else
            fncargs = wxEmptyString;

        // append this stack frame's info in the dialog
        if (!frame.GetFileName().empty() || !fncname.empty())
            gtk_assert_dialog_append_stack_frame(m_dlg,
                                                fncname.mb_str(),
                                                fncargs.mb_str(),
                                                frame.GetFileName().mb_str(),
                                                frame.GetLine());
    }

private:
    GtkAssertDialog *m_dlg;
};

static void get_stackframe_callback(void* p)
{
    StackDump* dump = static_cast<StackDump*>(p);
    // skip over frames up to including wxOnAssert()
    dump->ProcessFrames(3);
}

#endif // wxDEBUG_LEVEL && wxUSE_STACKWALKER

bool wxGUIAppTraits::ShowAssertDialog(const wxString& msg)
{
#if wxDEBUG_LEVEL
    // we can't show the dialog from another thread
    if ( wxIsMainThread() )
    {
        // under GTK2 we prefer to use a dialog widget written using directly
        // in GTK+ as use a dialog written using wxWidgets would need the
        // wxWidgets idle processing to work correctly which might not be the
        // case when assert happens
        GtkWidget *dialog = gtk_assert_dialog_new();
        gtk_assert_dialog_set_message(GTK_ASSERT_DIALOG(dialog), msg.mb_str());

#if wxUSE_STACKWALKER
        // save the current stack ow...
        StackDump dump(GTK_ASSERT_DIALOG(dialog));
        dump.SaveStack(100); // showing more than 100 frames is not very useful

        // ...but process it only if the user needs it
        gtk_assert_dialog_set_backtrace_callback
        (
            GTK_ASSERT_DIALOG(dialog),
            get_stackframe_callback,
            &dump
        );
#endif // wxUSE_STACKWALKER

        gint result = gtk_dialog_run(GTK_DIALOG (dialog));
        bool returnCode = false;
        switch (result)
        {
            case GTK_ASSERT_DIALOG_STOP:
                wxTrap();
                break;
            case GTK_ASSERT_DIALOG_CONTINUE:
                // nothing to do
                break;
            case GTK_ASSERT_DIALOG_CONTINUE_SUPPRESSING:
                // no more asserts
                returnCode = true;
                break;

            default:
                wxFAIL_MSG( wxT("unexpected return code from GtkAssertDialog") );
        }

        gtk_widget_destroy(dialog);
        return returnCode;
    }
#endif // wxDEBUG_LEVEL

    return wxAppTraitsBase::ShowAssertDialog(msg);
}

wxString wxGUIAppTraits::GetDesktopEnvironment() const
{
    wxString de = wxSystemOptions::GetOption(wxT("gtk.desktop"));
#if wxUSE_DETECT_SM
    if ( de.empty() )
    {
        static const wxString s_SM = GetSM();

        if (s_SM == wxT("GnomeSM"))
            de = wxT("GNOME");
        else if (s_SM == wxT("KDE"))
            de = wxT("KDE");
    }
#endif // wxUSE_DETECT_SM

    return de;
}

#ifdef __WXGTK26__

// see the hack below in wxCmdLineParser::GetUsageString().
// TODO: replace this hack with a g_option_group_get_entries()
//       call as soon as such function exists;
//       see http://bugzilla.gnome.org/show_bug.cgi?id=431021 for the relative
//       feature request
struct _GOptionGroup
{
  gchar           *name;
  gchar           *description;
  gchar           *help_description;

  GDestroyNotify   destroy_notify;
  gpointer         user_data;

  GTranslateFunc   translate_func;
  GDestroyNotify   translate_notify;
  gpointer     translate_data;

  GOptionEntry    *entries;
  gint             n_entries;

  GOptionParseFunc pre_parse_func;
  GOptionParseFunc post_parse_func;
  GOptionErrorFunc error_func;
};

wxString wxGetNameFromGtkOptionEntry(const GOptionEntry *opt)
{
    wxString ret;

    if (opt->short_name)
        ret << wxT("-") << opt->short_name;
    if (opt->long_name)
    {
        if (!ret.empty())
            ret << wxT(", ");
        ret << wxT("--") << opt->long_name;

        if (opt->arg_description)
            ret << wxT("=") << opt->arg_description;
    }

    return wxT("  ") + ret;
}

#endif // __WXGTK26__

wxString
wxGUIAppTraits::GetStandardCmdLineOptions(wxArrayString& names,
                                          wxArrayString& desc) const
{
    wxString usage;

#ifdef __WXGTK26__
    if (!gtk_check_version(2,6,0))
    {
        // since GTK>=2.6, we can use the glib_check_version() symbol...

        // check whether GLib version is greater than 2.6 but also lower than 2.19
        // because, as we use the undocumented _GOptionGroup struct, we don't want
        // to run this code with future versions which might change it (2.19 is the
        // latest one at the time of this writing)
        if (!glib_check_version(2,6,0) && glib_check_version(2,20,0))
        {
            usage << _("The following standard GTK+ options are also supported:\n");

            // passing true here means that the function can open the default
            // display while parsing (not really used here anyhow)
            GOptionGroup *gtkOpts = gtk_get_option_group(true);

            // WARNING: here we access the internals of GOptionGroup:
            GOptionEntry *entries = ((_GOptionGroup*)gtkOpts)->entries;
            unsigned int n_entries = ((_GOptionGroup*)gtkOpts)->n_entries;
            wxArrayString namesOptions, descOptions;

            for ( size_t n = 0; n < n_entries; n++ )
            {
                if ( entries[n].flags & G_OPTION_FLAG_HIDDEN )
                    continue;       // skip

                names.push_back(wxGetNameFromGtkOptionEntry(&entries[n]));

                const gchar * const entryDesc = entries[n].description;
                desc.push_back(wxString(entryDesc));
            }

            g_option_group_free (gtkOpts);
        }
    }
#else
    wxUnusedVar(names);
    wxUnusedVar(desc);
#endif // __WXGTK26__

    return usage;
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/gtk/utilsgtk.cpp
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Id: $Id$
	6	// Copyright: (c) 1998 Robert Roebling
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	// For compilers that support precompilation, includes "wx.h".
	11	#include "wx/wxprec.h"
	12
	13	#include "wx/utils.h"
	14
	15	#ifndef WX_PRECOMP
	16	#include "wx/string.h"
	17	#include "wx/intl.h"
	18	#include "wx/log.h"
	19	#endif
	20
	21	#include "wx/apptrait.h"
	22	#include "wx/process.h"
	23	#include "wx/sysopt.h"
	24	#include "wx/unix/execute.h"
	25
	26	#include "wx/gtk/private/timer.h"
	27	#include "wx/evtloop.h"
	28
	29	#include <gtk/gtk.h>
	30	#include <gdk/gdkx.h>
	31
	32	#if wxDEBUG_LEVEL
	33	#include "wx/gtk/assertdlg_gtk.h"
	34	#if wxUSE_STACKWALKER
	35	#include "wx/stackwalk.h"
	36	#endif // wxUSE_STACKWALKER
	37	#endif // wxDEBUG_LEVEL
	38
	39	#include <stdarg.h>
	40	#include <string.h>
	41	#include <sys/stat.h>
	42	#include <sys/types.h>
	43	#include <sys/wait.h> // for WNOHANG
	44	#include <unistd.h>
	45
	46	#if wxUSE_DETECT_SM
	47	#include <X11/SM/SMlib.h>
	48
	49	#include "wx/unix/utilsx11.h"
	50	#endif
	51
	52	//-----------------------------------------------------------------------------
	53	// data
	54	//-----------------------------------------------------------------------------
	55
	56	extern GtkWidget *wxGetRootWindow();
	57
	58	//----------------------------------------------------------------------------
	59	// misc.
	60	//----------------------------------------------------------------------------
	61	#ifndef __EMX__
	62	// on OS/2, we use the wxBell from wxBase library
	63
	64	void wxBell()
	65	{
	66	gdk_beep();
	67	}
	68	#endif
	69
	70	// ----------------------------------------------------------------------------
	71	// display characterstics
	72	// ----------------------------------------------------------------------------
	73
	74	void *wxGetDisplay()
	75	{
	76	return GDK_DISPLAY();
	77	}
	78
	79	void wxDisplaySize( int width, int height )
	80	{
	81	if (width) *width = gdk_screen_width();
	82	if (height) *height = gdk_screen_height();
	83	}
	84
	85	void wxDisplaySizeMM( int width, int height )
	86	{
	87	if (width) *width = gdk_screen_width_mm();
	88	if (height) *height = gdk_screen_height_mm();
	89	}
	90
	91	void wxGetMousePosition( int* x, int* y )
	92	{
	93	gdk_window_get_pointer(gtk_widget_get_root_window(wxGetRootWindow()), x, y, NULL);
	94	}
	95
	96	bool wxColourDisplay()
	97	{
	98	return true;
	99	}
	100
	101	int wxDisplayDepth()
	102	{
	103	return gtk_widget_get_visual(wxGetRootWindow())->depth;
	104	}
	105
	106	wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
	107	{
	108	return wxGenericFindWindowAtPoint(pt);
	109	}
	110
	111	#if !wxUSE_UNICODE
	112
	113	WXDLLIMPEXP_CORE wxCharBuffer
	114	wxConvertToGTK(const wxString& s, wxFontEncoding enc)
	115	{
	116	wxWCharBuffer wbuf;
	117	if ( enc == wxFONTENCODING_SYSTEM \|\| enc == wxFONTENCODING_DEFAULT )
	118	{
	119	wbuf = wxConvUI->cMB2WC(s.c_str());
	120	}
	121	else // another encoding, use generic conversion class
	122	{
	123	wbuf = wxCSConv(enc).cMB2WC(s.c_str());
	124	}
	125
	126	if ( !wbuf && !s.empty() )
	127	{
	128	// conversion failed, but we still want to show something to the user
	129	// even if it's going to be wrong it is better than nothing
	130	//
	131	// we choose ISO8859-1 here arbitrarily, it's just the most common
	132	// encoding probably and, also importantly here, conversion from it
	133	// never fails as it's done internally by wxCSConv
	134	wbuf = wxCSConv(wxFONTENCODING_ISO8859_1).cMB2WC(s.c_str());
	135	}
	136
	137	return wxConvUTF8.cWC2MB(wbuf);
	138	}
	139
	140	WXDLLIMPEXP_CORE wxCharBuffer
	141	wxConvertFromGTK(const wxString& s, wxFontEncoding enc)
	142	{
	143	// this conversion should never fail as GTK+ always uses UTF-8 internally
	144	// so there are no complications here
	145	const wxWCharBuffer wbuf(wxConvUTF8.cMB2WC(s.c_str()));
	146	if ( enc == wxFONTENCODING_SYSTEM )
	147	return wxConvUI->cWC2MB(wbuf);
	148
	149	return wxCSConv(enc).cWC2MB(wbuf);
	150	}
	151
	152	#endif // !wxUSE_UNICODE
	153
	154	// Returns NULL if version is certainly greater or equal than major.minor.micro
	155	// Returns string describing the error if version is lower than
	156	// major.minor.micro OR it cannot be determined and one should not rely on the
	157	// availability of pango version major.minor.micro, nor the non-availability
	158	const gchar *wx_pango_version_check (int major, int minor, int micro)
	159	{
	160	// NOTE: you don't need to use this macro to check for Pango features
	161	// added in pango-1.4 or earlier since GTK 2.4 (our minimum requirement
	162	// for GTK lib) required pango 1.4...
	163
	164	#ifdef PANGO_VERSION_MAJOR
	165	if (!gtk_check_version (2,11,0))
	166	{
	167	// GTK+ 2.11 requires Pango >= 1.15.3 and pango_version_check
	168	// was added in Pango 1.15.2 thus we know for sure the pango lib we're
	169	// using has the pango_version_check function:
	170	return pango_version_check (major, minor, micro);
	171	}
	172
	173	return "can't check";
	174	#else // !PANGO_VERSION_MAJOR
	175	wxUnusedVar(major);
	176	wxUnusedVar(minor);
	177	wxUnusedVar(micro);
	178
	179	return "too old headers";
	180	#endif
	181	}
	182
	183
	184	// ----------------------------------------------------------------------------
	185	// subprocess routines
	186	// ----------------------------------------------------------------------------
	187
	188	extern "C" {
	189	static gboolean EndProcessDetector(GIOChannel* source, GIOCondition, void* data)
	190	{
	191	wxEndProcessData * const
	192	proc_data = static_cast<wxEndProcessData *>(data);
	193
	194	// child exited, end waiting
	195	close(g_io_channel_unix_get_fd(source));
	196
	197	wxHandleProcessTermination(proc_data);
	198
	199	// don't call us again!
	200	return false;
	201	}
	202	}
	203
	204	int wxGUIAppTraits::AddProcessCallback(wxEndProcessData *proc_data, int fd)
	205	{
	206	GIOChannel* channel = g_io_channel_unix_new(fd);
	207	GIOCondition cond = GIOCondition(G_IO_IN \| G_IO_HUP \| G_IO_ERR);
	208	unsigned id = g_io_add_watch(channel, cond, EndProcessDetector, proc_data);
	209	g_io_channel_unref(channel);
	210	return int(id);
	211	}
	212
	213
	214
	215	// ----------------------------------------------------------------------------
	216	// wxPlatformInfo-related
	217	// ----------------------------------------------------------------------------
	218
	219	wxPortId wxGUIAppTraits::GetToolkitVersion(int verMaj, int verMin) const
	220	{
	221	if ( verMaj )
	222	*verMaj = gtk_major_version;
	223	if ( verMin )
	224	*verMin = gtk_minor_version;
	225
	226	return wxPORT_GTK;
	227	}
	228
	229	#if wxUSE_TIMER
	230
	231	wxTimerImpl wxGUIAppTraits::CreateTimerImpl(wxTimer timer)
	232	{
	233	return new wxGTKTimerImpl(timer);
	234	}
	235
	236	#endif // wxUSE_TIMER
	237
	238	#if wxUSE_DETECT_SM
	239	static wxString GetSM()
	240	{
	241	wxX11Display dpy;
	242	if ( !dpy )
	243	return wxEmptyString;
	244
	245	char smerr[256];
	246	char *client_id;
	247	SmcConn smc_conn = SmcOpenConnection(NULL, NULL,
	248	999, 999,
	249	0 /* mask /, NULL / callbacks */,
	250	NULL, &client_id,
	251	WXSIZEOF(smerr), smerr);
	252
	253	if ( !smc_conn )
	254	{
	255	wxLogDebug("Failed to connect to session manager: %s", smerr);
	256	return wxEmptyString;
	257	}
	258
	259	char *vendor = SmcVendor(smc_conn);
	260	wxString ret = wxString::FromAscii( vendor );
	261	free(vendor);
	262
	263	SmcCloseConnection(smc_conn, 0, NULL);
	264	free(client_id);
	265
	266	return ret;
	267	}
	268	#endif // wxUSE_DETECT_SM
	269
	270
	271	//-----------------------------------------------------------------------------
	272	// wxGUIAppTraits
	273	//-----------------------------------------------------------------------------
	274
	275	wxEventLoopBase *wxGUIAppTraits::CreateEventLoop()
	276	{
	277	return new wxEventLoop();
	278	}
	279
	280
	281	#if wxUSE_INTL
	282	void wxGUIAppTraits::SetLocale()
	283	{
	284	gtk_set_locale();
	285	wxUpdateLocaleIsUtf8();
	286	}
	287	#endif
	288
	289	#if wxDEBUG_LEVEL && wxUSE_STACKWALKER
	290
	291	// private helper class
	292	class StackDump : public wxStackWalker
	293	{
	294	public:
	295	StackDump(GtkAssertDialog *dlg) { m_dlg=dlg; }
	296
	297	protected:
	298	virtual void OnStackFrame(const wxStackFrame& frame)
	299	{
	300	wxString fncname = frame.GetName();
	301	wxString fncargs = fncname;
	302
	303	size_t n = fncname.find(wxT('('));
	304	if (n != wxString::npos)
	305	{
	306	// remove arguments from function name
	307	fncname.erase(n);
	308
	309	// remove function name and brackets from arguments
	310	fncargs = fncargs.substr(n+1, fncargs.length()-n-2);
	311	}
	312	else
	313	fncargs = wxEmptyString;
	314
	315	// append this stack frame's info in the dialog
	316	if (!frame.GetFileName().empty() \|\| !fncname.empty())
	317	gtk_assert_dialog_append_stack_frame(m_dlg,
	318	fncname.mb_str(),
	319	fncargs.mb_str(),
	320	frame.GetFileName().mb_str(),
	321	frame.GetLine());
	322	}
	323
	324	private:
	325	GtkAssertDialog *m_dlg;
	326	};
	327
	328	static void get_stackframe_callback(void* p)
	329	{
	330	StackDump* dump = static_cast<StackDump*>(p);
	331	// skip over frames up to including wxOnAssert()
	332	dump->ProcessFrames(3);
	333	}
	334
	335	#endif // wxDEBUG_LEVEL && wxUSE_STACKWALKER
	336
	337	bool wxGUIAppTraits::ShowAssertDialog(const wxString& msg)
	338	{
	339	#if wxDEBUG_LEVEL
	340	// we can't show the dialog from another thread
	341	if ( wxIsMainThread() )
	342	{
	343	// under GTK2 we prefer to use a dialog widget written using directly
	344	// in GTK+ as use a dialog written using wxWidgets would need the
	345	// wxWidgets idle processing to work correctly which might not be the
	346	// case when assert happens
	347	GtkWidget *dialog = gtk_assert_dialog_new();
	348	gtk_assert_dialog_set_message(GTK_ASSERT_DIALOG(dialog), msg.mb_str());
	349
	350	#if wxUSE_STACKWALKER
	351	// save the current stack ow...
	352	StackDump dump(GTK_ASSERT_DIALOG(dialog));
	353	dump.SaveStack(100); // showing more than 100 frames is not very useful
	354
	355	// ...but process it only if the user needs it
	356	gtk_assert_dialog_set_backtrace_callback
	357	(
	358	GTK_ASSERT_DIALOG(dialog),
	359	get_stackframe_callback,
	360	&dump
	361	);
	362	#endif // wxUSE_STACKWALKER
	363
	364	gint result = gtk_dialog_run(GTK_DIALOG (dialog));
	365	bool returnCode = false;
	366	switch (result)
	367	{
	368	case GTK_ASSERT_DIALOG_STOP:
	369	wxTrap();
	370	break;
	371	case GTK_ASSERT_DIALOG_CONTINUE:
	372	// nothing to do
	373	break;
	374	case GTK_ASSERT_DIALOG_CONTINUE_SUPPRESSING:
	375	// no more asserts
	376	returnCode = true;
	377	break;
	378
	379	default:
	380	wxFAIL_MSG( wxT("unexpected return code from GtkAssertDialog") );
	381	}
	382
	383	gtk_widget_destroy(dialog);
	384	return returnCode;
	385	}
	386	#endif // wxDEBUG_LEVEL
	387
	388	return wxAppTraitsBase::ShowAssertDialog(msg);
	389	}
	390
	391	wxString wxGUIAppTraits::GetDesktopEnvironment() const
	392	{
	393	wxString de = wxSystemOptions::GetOption(wxT("gtk.desktop"));
	394	#if wxUSE_DETECT_SM
	395	if ( de.empty() )
	396	{
	397	static const wxString s_SM = GetSM();
	398
	399	if (s_SM == wxT("GnomeSM"))
	400	de = wxT("GNOME");
	401	else if (s_SM == wxT("KDE"))
	402	de = wxT("KDE");
	403	}
	404	#endif // wxUSE_DETECT_SM
	405
	406	return de;
	407	}
	408
	409	#ifdef __WXGTK26__
	410
	411	// see the hack below in wxCmdLineParser::GetUsageString().
	412	// TODO: replace this hack with a g_option_group_get_entries()
	413	// call as soon as such function exists;
	414	// see http://bugzilla.gnome.org/show_bug.cgi?id=431021 for the relative
	415	// feature request
	416	struct _GOptionGroup
	417	{
	418	gchar *name;
	419	gchar *description;
	420	gchar *help_description;
	421
	422	GDestroyNotify destroy_notify;
	423	gpointer user_data;
	424
	425	GTranslateFunc translate_func;
	426	GDestroyNotify translate_notify;
	427	gpointer translate_data;
	428
	429	GOptionEntry *entries;
	430	gint n_entries;
	431
	432	GOptionParseFunc pre_parse_func;
	433	GOptionParseFunc post_parse_func;
	434	GOptionErrorFunc error_func;
	435	};
	436
	437	wxString wxGetNameFromGtkOptionEntry(const GOptionEntry *opt)
	438	{
	439	wxString ret;
	440
	441	if (opt->short_name)
	442	ret << wxT("-") << opt->short_name;
	443	if (opt->long_name)
	444	{
	445	if (!ret.empty())
	446	ret << wxT(", ");
	447	ret << wxT("--") << opt->long_name;
	448
	449	if (opt->arg_description)
	450	ret << wxT("=") << opt->arg_description;
	451	}
	452
	453	return wxT(" ") + ret;
	454	}
	455
	456	#endif // __WXGTK26__
	457
	458	wxString
	459	wxGUIAppTraits::GetStandardCmdLineOptions(wxArrayString& names,
	460	wxArrayString& desc) const
	461	{
	462	wxString usage;
	463
	464	#ifdef __WXGTK26__
	465	if (!gtk_check_version(2,6,0))
	466	{
	467	// since GTK>=2.6, we can use the glib_check_version() symbol...
	468
	469	// check whether GLib version is greater than 2.6 but also lower than 2.19
	470	// because, as we use the undocumented _GOptionGroup struct, we don't want
	471	// to run this code with future versions which might change it (2.19 is the
	472	// latest one at the time of this writing)
	473	if (!glib_check_version(2,6,0) && glib_check_version(2,20,0))
	474	{
	475	usage << _("The following standard GTK+ options are also supported:\n");
	476
	477	// passing true here means that the function can open the default
	478	// display while parsing (not really used here anyhow)
	479	GOptionGroup *gtkOpts = gtk_get_option_group(true);
	480
	481	// WARNING: here we access the internals of GOptionGroup:
	482	GOptionEntry entries = ((_GOptionGroup)gtkOpts)->entries;
	483	unsigned int n_entries = ((_GOptionGroup*)gtkOpts)->n_entries;
	484	wxArrayString namesOptions, descOptions;
	485
	486	for ( size_t n = 0; n < n_entries; n++ )
	487	{
	488	if ( entries[n].flags & G_OPTION_FLAG_HIDDEN )
	489	continue; // skip
	490
	491	names.push_back(wxGetNameFromGtkOptionEntry(&entries[n]));
	492
	493	const gchar * const entryDesc = entries[n].description;
	494	desc.push_back(wxString(entryDesc));
	495	}
	496
	497	g_option_group_free (gtkOpts);
	498	}
	499	}
	500	#else
	501	wxUnusedVar(names);
	502	wxUnusedVar(desc);
	503	#endif // __WXGTK26__
	504
	505	return usage;
	506	}
	507