src/common/fontmap.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        common/fontmap.cpp
// Purpose:     wxFontMapper class
// Author:      Vadim Zeitlin
// Modified by:
// Created:     04.11.99
// RCS-ID:      $Id$
// Copyright:   (c) 1999-2003 Vadim Zeitlin <vadim@wxwindows.org>
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

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

#ifdef __GNUG__
    #pragma implementation "fontmap.h"
#endif

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_FONTMAP

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

#if wxUSE_CONFIG
    #include "wx/config.h"
#endif // wxUSE_CONFIG

#if defined(__WXMSW__)
  #include  "wx/msw/private.h"  // includes windows.h for LOGFONT
  #include  "wx/msw/winundef.h"
#endif

#include "wx/fontmap.h"
#include "wx/fmappriv.h"
#include "wx/fontutil.h"
#include "wx/msgdlg.h"
#include "wx/fontdlg.h"
#include "wx/choicdlg.h"

#include "wx/encconv.h"

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

// the config paths we use
#if wxUSE_CONFIG

static const wxChar* FONTMAPPER_FONT_FROM_ENCODING_PATH = wxT("Encodings");
static const wxChar* FONTMAPPER_FONT_DONT_ASK = wxT("none");

#endif // wxUSE_CONFIG

// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------

// it may happen that while we're showing a dialog asking the user about
// something, another request for an encoding mapping arrives: in this case it
// is best to not do anything because otherwise we risk to enter an infinite
// loop so we create an object of this class on stack to test for this in all
// interactive functions
class ReentrancyBlocker
{
public:
    ReentrancyBlocker(bool& flag) : m_flagOld(flag), m_flag(flag)
        { m_flag = true; }
    ~ReentrancyBlocker() { m_flag = m_flagOld; }

private:
    bool m_flagOld;
    bool& m_flag;
};

// ============================================================================
// implementation
// ============================================================================

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

wxFontMapper::wxFontMapper()
{
    m_windowParent = NULL;
}

wxFontMapper::~wxFontMapper()
{
}

wxFontEncoding
wxFontMapper::CharsetToEncoding(const wxString& charset, bool interactive)
{
    // try the ways not needing the users intervention first
    int encoding = wxFontMapperBase::NonInteractiveCharsetToEncoding(charset);

    // if we failed to find the encoding, ask the user -- unless disabled
    if ( encoding == wxFONTENCODING_UNKNOWN )
    {
        // this is the special value which disables asking the user (he had
        // chosen to suppress this the last time)
        encoding = wxFONTENCODING_SYSTEM;
    }
    else if ( (encoding == wxFONTENCODING_SYSTEM) && interactive )
    {
        // prepare the dialog data

        // the dialog title
        wxString title(m_titleDialog);
        if ( !title )
            title << wxTheApp->GetAppName() << _(": unknown charset");

        // the message
        wxString msg;
        msg.Printf(_("The charset '%s' is unknown. You may select\nanother charset to replace it with or choose\n[Cancel] if it cannot be replaced"), charset.c_str());

        // the list of choices
        const size_t count = GetSupportedEncodingsCount();

        wxString *encodingNamesTranslated = new wxString[count];

        for ( size_t i = 0; i < count; i++ )
        {
            encodingNamesTranslated[i] = GetEncodingDescription(GetEncoding(i));
        }

        // the parent window
        wxWindow *parent = m_windowParent;
        if ( !parent )
            parent = wxTheApp->GetTopWindow();

        // do ask the user and get back the index in encodings table
        int n = wxGetSingleChoiceIndex(msg, title,
                                       count,
                                       encodingNamesTranslated,
                                       parent);

        delete [] encodingNamesTranslated;

        if ( n != -1 )
        {
            encoding = GetEncoding(n);
        }

#if wxUSE_CONFIG && wxUSE_FILECONFIG
        // save the result in the config now
        wxFontMapperPathChanger path(this, FONTMAPPER_CHARSET_PATH);
        if ( path.IsOk() )
        {
            wxConfigBase *config = GetConfig();

            // remember the alt encoding for this charset -- or remember that
            // we don't know it
            long value = n == -1 ? wxFONTENCODING_UNKNOWN : (long)encoding;
            if ( !config->Write(charset, value) )
            {
                wxLogError(_("Failed to remember the encoding for the charset '%s'."), charset.c_str());
            }
        }
#endif // wxUSE_CONFIG
    }

    return (wxFontEncoding)encoding;
}

// ----------------------------------------------------------------------------
// support for unknown encodings: we maintain a map between the
// (platform-specific) strings identifying them and our wxFontEncodings they
// correspond to which is used by GetFontForEncoding() function
// ----------------------------------------------------------------------------

bool wxFontMapper::TestAltEncoding(const wxString& configEntry,
                                   wxFontEncoding encReplacement,
                                   wxNativeEncodingInfo *info)
{
    if ( wxGetNativeFontEncoding(encReplacement, info) &&
         wxTestFontEncoding(*info) )
    {
#if wxUSE_CONFIG && wxUSE_FILECONFIG
        // remember the mapping in the config
        wxFontMapperPathChanger path(this, FONTMAPPER_FONT_FROM_ENCODING_PATH);

        if ( path.IsOk() )
        {
            GetConfig()->Write(configEntry, info->ToString());
        }
#endif // wxUSE_CONFIG
        return true;
    }

    return false;
}

bool wxFontMapper::GetAltForEncoding(wxFontEncoding encoding,
                                     wxNativeEncodingInfo *info,
                                     const wxString& facename,
                                     bool interactive)
{
#if wxUSE_GUI
    // we need a flag to prevent infinite recursion which happens, for
    // example, when GetAltForEncoding() is called from an OnPaint() handler:
    // in this case, wxYield() which is called from wxMessageBox() we use here
    // will lead to another call of OnPaint() and hence to another call of
    // GetAltForEncoding() -- and it is impossible to catch this from the user
    // code because we are called from wxFont ctor implicitly.

    // assume we're always called from the main thread, so that it is safe to
    // use a static var
    static bool s_inGetAltForEncoding = false;

    if ( interactive && s_inGetAltForEncoding )
        return false;

    ReentrancyBlocker blocker(s_inGetAltForEncoding);
#endif // wxUSE_GUI

    wxCHECK_MSG( info, false, wxT("bad pointer in GetAltForEncoding") );

    info->facename = facename;

    if ( encoding == wxFONTENCODING_DEFAULT )
    {
        encoding = wxFont::GetDefaultEncoding();
    }

    // if we failed to load the system default encoding, something is really
    // wrong and we'd better stop now -- otherwise we will go into endless
    // recursion trying to create the font in the msg box with the error
    // message
    if ( encoding == wxFONTENCODING_SYSTEM )
    {
        wxLogFatalError(_("can't load any font, aborting"));

        // wxLogFatalError doesn't return
    }

    wxString configEntry,
             encName = GetEncodingName(encoding);
    if ( !!facename )
    {
        configEntry = facename + _T("_");
    }
    configEntry += encName;

#if wxUSE_CONFIG && wxUSE_FILECONFIG
    // do we have a font spec for this encoding?
    wxString fontinfo;
    wxFontMapperPathChanger path(this, FONTMAPPER_FONT_FROM_ENCODING_PATH);
    if ( path.IsOk() )
    {
        fontinfo = GetConfig()->Read(configEntry);
    }

    // this special value means that we don't know of fonts for this
    // encoding but, moreover, have already asked the user as well and he
    // didn't specify any font neither
    if ( fontinfo == FONTMAPPER_FONT_DONT_ASK )
    {
        interactive = false;
    }
    else // use the info entered the last time
    {
        if ( !!fontinfo && !!facename )
        {
            // we tried to find a match with facename -- now try without it
            fontinfo = GetConfig()->Read(encName);
        }

        if ( !!fontinfo )
        {
            if ( info->FromString(fontinfo) )
            {
                if ( wxTestFontEncoding(*info) )
                {
                    // ok, got something
                    return true;
                }
                //else: no such fonts, look for something else
                //      (should we erase the outdated value?)
            }
            else
            {
                wxLogDebug(wxT("corrupted config data: string '%s' is not a valid font encoding info"),
                           fontinfo.c_str());
            }
        }
        //else: there is no information in config about this encoding
    }
#endif // wxUSE_CONFIG

    // now try to map this encoding to a compatible one which we have on this
    // system
    wxFontEncodingArray equiv = wxEncodingConverter::GetAllEquivalents(encoding);
    size_t count = equiv.GetCount();
    bool foundEquivEncoding = false;
    wxFontEncoding equivEncoding = wxFONTENCODING_SYSTEM;
    if ( count )
    {
        for ( size_t i = 0; i < count && !foundEquivEncoding; i++ )
        {
            // don't test for encoding itself, we already know we don't have it
            if ( equiv[i] == encoding )
                continue;

            if ( TestAltEncoding(configEntry, equiv[i], info) )
            {
                equivEncoding = equiv[i];

                foundEquivEncoding = true;
            }
        }
    }

    // ask the user
#if wxUSE_FONTDLG
    if ( interactive )
    {
        wxString title(m_titleDialog);
        if ( !title )
            title << wxTheApp->GetAppName() << _(": unknown encoding");

        // built the message
        wxString encDesc = GetEncodingDescription(encoding),
                 msg;
        if ( foundEquivEncoding )
        {
            // ask the user if he wants to override found alternative encoding
            msg.Printf(_("No font for displaying text in encoding '%s' found,\nbut an alternative encoding '%s' is available.\nDo you want to use this encoding (otherwise you will have to choose another one)?"),
                       encDesc.c_str(), GetEncodingDescription(equivEncoding).c_str());
        }
        else
        {
            msg.Printf(_("No font for displaying text in encoding '%s' found.\nWould you like to select a font to be used for this encoding\n(otherwise the text in this encoding will not be shown correctly)?"),
                       encDesc.c_str());
        }

        // the question is different in 2 cases so the answer has to be
        // interpreted differently as well
        int answer = foundEquivEncoding ? wxNO : wxYES;

        if ( wxMessageBox(msg, title,
                          wxICON_QUESTION | wxYES_NO,
                          m_windowParent) == answer )
        {
            wxFontData data;
            data.SetEncoding(encoding);
            data.EncodingInfo() = *info;
            wxFontDialog dialog(m_windowParent, data);
            if ( dialog.ShowModal() == wxID_OK )
            {
                wxFontData retData = dialog.GetFontData();
                wxFont font = retData.GetChosenFont();

                *info = retData.EncodingInfo();
                info->encoding = retData.GetEncoding();

#if wxUSE_CONFIG && wxUSE_FILECONFIG
                // remember this in the config
                wxFontMapperPathChanger path(this,
                                             FONTMAPPER_FONT_FROM_ENCODING_PATH);
                if ( path.IsOk() )
                {
                    GetConfig()->Write(configEntry, info->ToString());
                }
#endif // wxUSE_CONFIG

                return true;
            }
            //else: the user canceled the font selection dialog
        }
        else
        {
            // the user doesn't want to select a font for this encoding
            // or selected to use equivalent encoding
            //
            // remember it to avoid asking the same question again later
#if wxUSE_CONFIG && wxUSE_FILECONFIG
            wxFontMapperPathChanger path(this,
                                         FONTMAPPER_FONT_FROM_ENCODING_PATH);
            if ( path.IsOk() )
            {
                GetConfig()->Write
                             (
                                configEntry,
                                foundEquivEncoding ? info->ToString().c_str()
                                                   : FONTMAPPER_FONT_DONT_ASK
                             );
            }
#endif // wxUSE_CONFIG
        }
    }
    //else: we're in non-interactive mode
#endif // wxUSE_FONTDLG

    return foundEquivEncoding;
}

bool wxFontMapper::GetAltForEncoding(wxFontEncoding encoding,
                                     wxFontEncoding *encodingAlt,
                                     const wxString& facename,
                                     bool interactive)
{
    wxNativeEncodingInfo info;
    if ( !GetAltForEncoding(encoding, &info, facename, interactive) )
        return false;

    wxCHECK_MSG( encodingAlt, false,
                    _T("wxFontEncoding::GetAltForEncoding(): NULL pointer") );

    *encodingAlt = info.encoding;

    return true;
}

bool wxFontMapper::IsEncodingAvailable(wxFontEncoding encoding,
                                       const wxString& facename)
{
    wxNativeEncodingInfo info;

    if ( !wxGetNativeFontEncoding(encoding, &info) )
        return false;

    info.facename = facename;
    return wxTestFontEncoding(info);
}

#endif // wxUSE_FONTMAP
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: common/fontmap.cpp
	3	// Purpose: wxFontMapper class
	4	// Author: Vadim Zeitlin
	5	// Modified by:
	6	// Created: 04.11.99
	7	// RCS-ID: $Id$
	8	// Copyright: (c) 1999-2003 Vadim Zeitlin <vadim@wxwindows.org>
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	// ============================================================================
	13	// declarations
	14	// ============================================================================
	15
	16	// ----------------------------------------------------------------------------
	17	// headers
	18	// ----------------------------------------------------------------------------
	19
	20	#ifdef __GNUG__
	21	#pragma implementation "fontmap.h"
	22	#endif
	23
	24	// For compilers that support precompilation, includes "wx.h".
	25	#include "wx/wxprec.h"
	26
	27	#ifdef __BORLANDC__
	28	#pragma hdrstop
	29	#endif
	30
	31	#if wxUSE_FONTMAP
	32
	33	#ifndef WX_PRECOMP
	34	#include "wx/app.h"
	35	#include "wx/log.h"
	36	#include "wx/intl.h"
	37	#endif // PCH
	38
	39	#if wxUSE_CONFIG
	40	#include "wx/config.h"
	41	#endif // wxUSE_CONFIG
	42
	43	#if defined(__WXMSW__)
	44	#include "wx/msw/private.h" // includes windows.h for LOGFONT
	45	#include "wx/msw/winundef.h"
	46	#endif
	47
	48	#include "wx/fontmap.h"
	49	#include "wx/fmappriv.h"
	50	#include "wx/fontutil.h"
	51	#include "wx/msgdlg.h"
	52	#include "wx/fontdlg.h"
	53	#include "wx/choicdlg.h"
	54
	55	#include "wx/encconv.h"
	56
	57	// ----------------------------------------------------------------------------
	58	// constants
	59	// ----------------------------------------------------------------------------
	60
	61	// the config paths we use
	62	#if wxUSE_CONFIG
	63
	64	static const wxChar* FONTMAPPER_FONT_FROM_ENCODING_PATH = wxT("Encodings");
	65	static const wxChar* FONTMAPPER_FONT_DONT_ASK = wxT("none");
	66
	67	#endif // wxUSE_CONFIG
	68
	69	// ----------------------------------------------------------------------------
	70	// private classes
	71	// ----------------------------------------------------------------------------
	72
	73	// it may happen that while we're showing a dialog asking the user about
	74	// something, another request for an encoding mapping arrives: in this case it
	75	// is best to not do anything because otherwise we risk to enter an infinite
	76	// loop so we create an object of this class on stack to test for this in all
	77	// interactive functions
	78	class ReentrancyBlocker
	79	{
	80	public:
	81	ReentrancyBlocker(bool& flag) : m_flagOld(flag), m_flag(flag)
	82	{ m_flag = true; }
	83	~ReentrancyBlocker() { m_flag = m_flagOld; }
	84
	85	private:
	86	bool m_flagOld;
	87	bool& m_flag;
	88	};
	89
	90	// ============================================================================
	91	// implementation
	92	// ============================================================================
	93
	94	// ----------------------------------------------------------------------------
	95	// ctor and dtor
	96	// ----------------------------------------------------------------------------
	97
	98	wxFontMapper::wxFontMapper()
	99	{
	100	m_windowParent = NULL;
	101	}
	102
	103	wxFontMapper::~wxFontMapper()
	104	{
	105	}
	106
	107	wxFontEncoding
	108	wxFontMapper::CharsetToEncoding(const wxString& charset, bool interactive)
	109	{
	110	// try the ways not needing the users intervention first
	111	int encoding = wxFontMapperBase::NonInteractiveCharsetToEncoding(charset);
	112
	113	// if we failed to find the encoding, ask the user -- unless disabled
	114	if ( encoding == wxFONTENCODING_UNKNOWN )
	115	{
	116	// this is the special value which disables asking the user (he had
	117	// chosen to suppress this the last time)
	118	encoding = wxFONTENCODING_SYSTEM;
	119	}
	120	else if ( (encoding == wxFONTENCODING_SYSTEM) && interactive )
	121	{
	122	// prepare the dialog data
	123
	124	// the dialog title
	125	wxString title(m_titleDialog);
	126	if ( !title )
	127	title << wxTheApp->GetAppName() << _(": unknown charset");
	128
	129	// the message
	130	wxString msg;
	131	msg.Printf(_("The charset '%s' is unknown. You may select\nanother charset to replace it with or choose\n[Cancel] if it cannot be replaced"), charset.c_str());
	132
	133	// the list of choices
	134	const size_t count = GetSupportedEncodingsCount();
	135
	136	wxString *encodingNamesTranslated = new wxString[count];
	137
	138	for ( size_t i = 0; i < count; i++ )
	139	{
	140	encodingNamesTranslated[i] = GetEncodingDescription(GetEncoding(i));
	141	}
	142
	143	// the parent window
	144	wxWindow *parent = m_windowParent;
	145	if ( !parent )
	146	parent = wxTheApp->GetTopWindow();
	147
	148	// do ask the user and get back the index in encodings table
	149	int n = wxGetSingleChoiceIndex(msg, title,
	150	count,
	151	encodingNamesTranslated,
	152	parent);
	153
	154	delete [] encodingNamesTranslated;
	155
	156	if ( n != -1 )
	157	{
	158	encoding = GetEncoding(n);
	159	}
	160
	161	#if wxUSE_CONFIG && wxUSE_FILECONFIG
	162	// save the result in the config now
	163	wxFontMapperPathChanger path(this, FONTMAPPER_CHARSET_PATH);
	164	if ( path.IsOk() )
	165	{
	166	wxConfigBase *config = GetConfig();
	167
	168	// remember the alt encoding for this charset -- or remember that
	169	// we don't know it
	170	long value = n == -1 ? wxFONTENCODING_UNKNOWN : (long)encoding;
	171	if ( !config->Write(charset, value) )
	172	{
	173	wxLogError(_("Failed to remember the encoding for the charset '%s'."), charset.c_str());
	174	}
	175	}
	176	#endif // wxUSE_CONFIG
	177	}
	178
	179	return (wxFontEncoding)encoding;
	180	}
	181
	182	// ----------------------------------------------------------------------------
	183	// support for unknown encodings: we maintain a map between the
	184	// (platform-specific) strings identifying them and our wxFontEncodings they
	185	// correspond to which is used by GetFontForEncoding() function
	186	// ----------------------------------------------------------------------------
	187
	188	bool wxFontMapper::TestAltEncoding(const wxString& configEntry,
	189	wxFontEncoding encReplacement,
	190	wxNativeEncodingInfo *info)
	191	{
	192	if ( wxGetNativeFontEncoding(encReplacement, info) &&
	193	wxTestFontEncoding(*info) )
	194	{
	195	#if wxUSE_CONFIG && wxUSE_FILECONFIG
	196	// remember the mapping in the config
	197	wxFontMapperPathChanger path(this, FONTMAPPER_FONT_FROM_ENCODING_PATH);
	198
	199	if ( path.IsOk() )
	200	{
	201	GetConfig()->Write(configEntry, info->ToString());
	202	}
	203	#endif // wxUSE_CONFIG
	204	return true;
	205	}
	206
	207	return false;
	208	}
	209
	210	bool wxFontMapper::GetAltForEncoding(wxFontEncoding encoding,
	211	wxNativeEncodingInfo *info,
	212	const wxString& facename,
	213	bool interactive)
	214	{
	215	#if wxUSE_GUI
	216	// we need a flag to prevent infinite recursion which happens, for
	217	// example, when GetAltForEncoding() is called from an OnPaint() handler:
	218	// in this case, wxYield() which is called from wxMessageBox() we use here
	219	// will lead to another call of OnPaint() and hence to another call of
	220	// GetAltForEncoding() -- and it is impossible to catch this from the user
	221	// code because we are called from wxFont ctor implicitly.
	222
	223	// assume we're always called from the main thread, so that it is safe to
	224	// use a static var
	225	static bool s_inGetAltForEncoding = false;
	226
	227	if ( interactive && s_inGetAltForEncoding )
	228	return false;
	229
	230	ReentrancyBlocker blocker(s_inGetAltForEncoding);
	231	#endif // wxUSE_GUI
	232
	233	wxCHECK_MSG( info, false, wxT("bad pointer in GetAltForEncoding") );
	234
	235	info->facename = facename;
	236
	237	if ( encoding == wxFONTENCODING_DEFAULT )
	238	{
	239	encoding = wxFont::GetDefaultEncoding();
	240	}
	241
	242	// if we failed to load the system default encoding, something is really
	243	// wrong and we'd better stop now -- otherwise we will go into endless
	244	// recursion trying to create the font in the msg box with the error
	245	// message
	246	if ( encoding == wxFONTENCODING_SYSTEM )
	247	{
	248	wxLogFatalError(_("can't load any font, aborting"));
	249
	250	// wxLogFatalError doesn't return
	251	}
	252
	253	wxString configEntry,
	254	encName = GetEncodingName(encoding);
	255	if ( !!facename )
	256	{
	257	configEntry = facename + _T("_");
	258	}
	259	configEntry += encName;
	260
	261	#if wxUSE_CONFIG && wxUSE_FILECONFIG
	262	// do we have a font spec for this encoding?
	263	wxString fontinfo;
	264	wxFontMapperPathChanger path(this, FONTMAPPER_FONT_FROM_ENCODING_PATH);
	265	if ( path.IsOk() )
	266	{
	267	fontinfo = GetConfig()->Read(configEntry);
	268	}
	269
	270	// this special value means that we don't know of fonts for this
	271	// encoding but, moreover, have already asked the user as well and he
	272	// didn't specify any font neither
	273	if ( fontinfo == FONTMAPPER_FONT_DONT_ASK )
	274	{
	275	interactive = false;
	276	}
	277	else // use the info entered the last time
	278	{
	279	if ( !!fontinfo && !!facename )
	280	{
	281	// we tried to find a match with facename -- now try without it
	282	fontinfo = GetConfig()->Read(encName);
	283	}
	284
	285	if ( !!fontinfo )
	286	{
	287	if ( info->FromString(fontinfo) )
	288	{
	289	if ( wxTestFontEncoding(*info) )
	290	{
	291	// ok, got something
	292	return true;
	293	}
	294	//else: no such fonts, look for something else
	295	// (should we erase the outdated value?)
	296	}
	297	else
	298	{
	299	wxLogDebug(wxT("corrupted config data: string '%s' is not a valid font encoding info"),
	300	fontinfo.c_str());
	301	}
	302	}
	303	//else: there is no information in config about this encoding
	304	}
	305	#endif // wxUSE_CONFIG
	306
	307	// now try to map this encoding to a compatible one which we have on this
	308	// system
	309	wxFontEncodingArray equiv = wxEncodingConverter::GetAllEquivalents(encoding);
	310	size_t count = equiv.GetCount();
	311	bool foundEquivEncoding = false;
	312	wxFontEncoding equivEncoding = wxFONTENCODING_SYSTEM;
	313	if ( count )
	314	{
	315	for ( size_t i = 0; i < count && !foundEquivEncoding; i++ )
	316	{
	317	// don't test for encoding itself, we already know we don't have it
	318	if ( equiv[i] == encoding )
	319	continue;
	320
	321	if ( TestAltEncoding(configEntry, equiv[i], info) )
	322	{
	323	equivEncoding = equiv[i];
	324
	325	foundEquivEncoding = true;
	326	}
	327	}
	328	}
	329
	330	// ask the user
	331	#if wxUSE_FONTDLG
	332	if ( interactive )
	333	{
	334	wxString title(m_titleDialog);
	335	if ( !title )
	336	title << wxTheApp->GetAppName() << _(": unknown encoding");
	337
	338	// built the message
	339	wxString encDesc = GetEncodingDescription(encoding),
	340	msg;
	341	if ( foundEquivEncoding )
	342	{
	343	// ask the user if he wants to override found alternative encoding
	344	msg.Printf(_("No font for displaying text in encoding '%s' found,\nbut an alternative encoding '%s' is available.\nDo you want to use this encoding (otherwise you will have to choose another one)?"),
	345	encDesc.c_str(), GetEncodingDescription(equivEncoding).c_str());
	346	}
	347	else
	348	{
	349	msg.Printf(_("No font for displaying text in encoding '%s' found.\nWould you like to select a font to be used for this encoding\n(otherwise the text in this encoding will not be shown correctly)?"),
	350	encDesc.c_str());
	351	}
	352
	353	// the question is different in 2 cases so the answer has to be
	354	// interpreted differently as well
	355	int answer = foundEquivEncoding ? wxNO : wxYES;
	356
	357	if ( wxMessageBox(msg, title,
	358	wxICON_QUESTION \| wxYES_NO,
	359	m_windowParent) == answer )
	360	{
	361	wxFontData data;
	362	data.SetEncoding(encoding);
	363	data.EncodingInfo() = *info;
	364	wxFontDialog dialog(m_windowParent, data);
	365	if ( dialog.ShowModal() == wxID_OK )
	366	{
	367	wxFontData retData = dialog.GetFontData();
	368	wxFont font = retData.GetChosenFont();
	369
	370	*info = retData.EncodingInfo();
	371	info->encoding = retData.GetEncoding();
	372
	373	#if wxUSE_CONFIG && wxUSE_FILECONFIG
	374	// remember this in the config
	375	wxFontMapperPathChanger path(this,
	376	FONTMAPPER_FONT_FROM_ENCODING_PATH);
	377	if ( path.IsOk() )
	378	{
	379	GetConfig()->Write(configEntry, info->ToString());
	380	}
	381	#endif // wxUSE_CONFIG
	382
	383	return true;
	384	}
	385	//else: the user canceled the font selection dialog
	386	}
	387	else
	388	{
	389	// the user doesn't want to select a font for this encoding
	390	// or selected to use equivalent encoding
	391	//
	392	// remember it to avoid asking the same question again later
	393	#if wxUSE_CONFIG && wxUSE_FILECONFIG
	394	wxFontMapperPathChanger path(this,
	395	FONTMAPPER_FONT_FROM_ENCODING_PATH);
	396	if ( path.IsOk() )
	397	{
	398	GetConfig()->Write
	399	(
	400	configEntry,
	401	foundEquivEncoding ? info->ToString().c_str()
	402	: FONTMAPPER_FONT_DONT_ASK
	403	);
	404	}
	405	#endif // wxUSE_CONFIG
	406	}
	407	}
	408	//else: we're in non-interactive mode
	409	#endif // wxUSE_FONTDLG
	410
	411	return foundEquivEncoding;
	412	}
	413
	414	bool wxFontMapper::GetAltForEncoding(wxFontEncoding encoding,
	415	wxFontEncoding *encodingAlt,
	416	const wxString& facename,
	417	bool interactive)
	418	{
	419	wxNativeEncodingInfo info;
	420	if ( !GetAltForEncoding(encoding, &info, facename, interactive) )
	421	return false;
	422
	423	wxCHECK_MSG( encodingAlt, false,
	424	_T("wxFontEncoding::GetAltForEncoding(): NULL pointer") );
	425
	426	*encodingAlt = info.encoding;
	427
	428	return true;
	429	}
	430
	431	bool wxFontMapper::IsEncodingAvailable(wxFontEncoding encoding,
	432	const wxString& facename)
	433	{
	434	wxNativeEncodingInfo info;
	435
	436	if ( !wxGetNativeFontEncoding(encoding, &info) )
	437	return false;
	438
	439	info.facename = facename;
	440	return wxTestFontEncoding(info);
	441	}
	442
	443	#endif // wxUSE_FONTMAP