fmapbase.cpp

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        m_config = wxConfig::Get();
    }

    return m_config;
}

const wxString& wxFontMapperBase::GetConfigPath()
{
    if ( !m_configRootPath )
    {
        // use the default
        m_configRootPath = GetDefaultConfigPath();
    }

    return m_configRootPath;
}

// ----------------------------------------------------------------------------
// config helpers
// ----------------------------------------------------------------------------

bool wxFontMapperBase::ChangePath(const wxString& pathNew, wxString *pathOld)
{
    wxConfigBase *config = GetConfig();
    if ( !config )
        return false;

    *pathOld = config->GetPath();

    wxString path = GetConfigPath();
    if ( path.IsEmpty() || path.Last() != wxCONFIG_PATH_SEPARATOR )
    {
        path += wxCONFIG_PATH_SEPARATOR;
    }

    wxASSERT_MSG( !pathNew || (pathNew[0] != wxCONFIG_PATH_SEPARATOR),
                  wxT("should be a relative path") );

    path += pathNew;

    config->SetPath(path);

    return true;
}

void wxFontMapperBase::RestorePath(const wxString& pathOld)
{
    GetConfig()->SetPath(pathOld);
}

#endif

// ----------------------------------------------------------------------------
// charset/encoding correspondence
// ----------------------------------------------------------------------------

wxFontEncoding
wxFontMapperBase::CharsetToEncoding(const wxString& charset,
                                    bool WXUNUSED(interactive))
{
    int enc = NonInteractiveCharsetToEncoding(charset);
    if ( enc == wxFONTENCODING_UNKNOWN )
    {
        // we should return wxFONTENCODING_SYSTEM from here for unknown
        // encodings
        enc = wxFONTENCODING_SYSTEM;
    }

    return (wxFontEncoding)enc;
}

int
wxFontMapperBase::NonInteractiveCharsetToEncoding(const wxString& charset)
{
    wxFontEncoding encoding = wxFONTENCODING_SYSTEM;

    // we're going to modify it, make a copy
    wxString cs = charset;

#if wxUSE_CONFIG && wxUSE_FILECONFIG
    // first try the user-defined settings
    wxFontMapperPathChanger path(this, FONTMAPPER_CHARSET_PATH);
    if ( path.IsOk() )
    {
        wxConfigBase *config = GetConfig();

        // do we have an encoding for this charset?
        long value = config->Read(charset, -1l);
        if ( value != -1 )
        {
            if ( value == wxFONTENCODING_UNKNOWN )
            {
                // don't try to find it, in particular don't ask the user
                return value;
            }

            if ( value >= 0 && value <= wxFONTENCODING_MAX )
            {
                encoding = (wxFontEncoding)value;
            }
            else
            {
                wxLogDebug(wxT("corrupted config data: invalid encoding %ld for charset '%s' ignored"),
                           value, charset.c_str());
            }
        }

        if ( encoding == wxFONTENCODING_SYSTEM )
        {
            // may be we have an alias?
            config->SetPath(FONTMAPPER_CHARSET_ALIAS_PATH);

            wxString alias = config->Read(charset);
            if ( !alias.IsEmpty() )
            {
                // yes, we do - use it instead
                cs = alias;
            }
        }
    }
#endif // wxUSE_CONFIG

    // if didn't find it there, try to recognize it ourselves
    if ( encoding == wxFONTENCODING_SYSTEM )
    {
        // trim any spaces
        cs.Trim(true);
        cs.Trim(false);

        // discard the optional quotes
        if ( !cs.empty() )
        {
            if ( cs[0u] == _T('"') && cs.Last() == _T('"') )
            {
                cs = wxString(cs.c_str(), cs.length() - 1);
            }
        }

        for ( size_t i = 0; i < WXSIZEOF(gs_encodingNames); ++i )
        {
            for ( const wxChar** encName = gs_encodingNames[i]; *encName; ++encName )
            {
                if ( cs.CmpNoCase(*encName) == 0 )
                    return gs_encodings[i];
            }
        }

        cs.MakeUpper();

        if ( cs.Left(3) == wxT("ISO") )
        {
            // the dash is optional (or, to be exact, it is not, but
            // several brokenmails "forget" it)
            const wxChar *p = cs.c_str() + 3;
            if ( *p == wxT('-') )
                p++;

            // printf( "iso %s\n", (const char*) cs.ToAscii() );

            unsigned int value;
            if ( wxSscanf(p, wxT("8859-%u"), &value) == 1 )
            {
                // printf( "value %d\n", (int)value );

                // make it 0 based and check that it is strictly positive in
                // the process (no such thing as iso8859-0 encoding)
                if ( (value-- > 0) &&
                     (value < wxFONTENCODING_ISO8859_MAX -
                              wxFONTENCODING_ISO8859_1) )
                {
                    // it's a valid ISO8859 encoding
                    value += wxFONTENCODING_ISO8859_1;
                    encoding = (wxFontEncoding)value;
                }
            }
        }
        else if ( cs.Left(4) == wxT("8859") )
        {
            const wxChar *p = cs.c_str();

            unsigned int value;
            if ( wxSscanf(p, wxT("8859-%u"), &value) == 1 )
            {
                // printf( "value %d\n", (int)value );

                // make it 0 based and check that it is strictly positive in
                // the process (no such thing as iso8859-0 encoding)
                if ( (value-- > 0) &&
                     (value < wxFONTENCODING_ISO8859_MAX -
                              wxFONTENCODING_ISO8859_1) )
                {
                    // it's a valid ISO8859 encoding
                    value += wxFONTENCODING_ISO8859_1;
                    encoding = (wxFontEncoding)value;
                }
            }
        }
        else // check for Windows charsets
        {
            size_t len;
            if ( cs.Left(7) == wxT("WINDOWS") )
            {
                len = 7;
            }
            else if ( cs.Left(2) == wxT("CP") )
            {
                len = 2;
            }
            else // not a Windows encoding
            {
                len = 0;
            }

            if ( len )
            {
                const wxChar *p = cs.c_str() + len;
                if ( *p == wxT('-') )
                    p++;

                int value;
                if ( wxSscanf(p, wxT("%u"), &value) == 1 )
                {
                    if ( value >= 1250 )
                    {
                        value -= 1250;
                        if ( value < wxFONTENCODING_CP12_MAX -
                                     wxFONTENCODING_CP1250 )
                        {
                            // a valid Windows code page
                            value += wxFONTENCODING_CP1250;
                            encoding = (wxFontEncoding)value;
                        }
                    }

                    switch ( value )
                    {
                        case 874:
                            encoding = wxFONTENCODING_CP874;
                            break;

                        case 932:
                            encoding = wxFONTENCODING_CP932;
                            break;

                        case 936:
                            encoding = wxFONTENCODING_CP936;
                            break;

                        case 949:
                            encoding = wxFONTENCODING_CP949;
                            break;

                        case 950:
                            encoding = wxFONTENCODING_CP950;
                            break;
                    }
                }
            }
        }
        //else: unknown
    }

    return encoding;
}

/* static */
size_t wxFontMapperBase::GetSupportedEncodingsCount()
{
    return WXSIZEOF(gs_encodings);
}

/* static */
wxFontEncoding wxFontMapperBase::GetEncoding(size_t n)
{
    wxCHECK_MSG( n < WXSIZEOF(gs_encodings), wxFONTENCODING_SYSTEM,
                    _T("wxFontMapper::GetEncoding(): invalid index") );

    return gs_encodings[n];
}

/* static */
wxString wxFontMapperBase::GetEncodingDescription(wxFontEncoding encoding)
{
    if ( encoding == wxFONTENCODING_DEFAULT )
    {
        return _("Default encoding");
    }

    const size_t count = WXSIZEOF(gs_encodingDescs);

    for ( size_t i = 0; i < count; i++ )
    {
        if ( gs_encodings[i] == encoding )
        {
            return wxGetTranslation(gs_encodingDescs[i]);
        }
    }

    wxString str;
    str.Printf(_("Unknown encoding (%d)"), encoding);

    return str;
}

/* static */
wxString wxFontMapperBase::GetEncodingName(wxFontEncoding encoding)
{
    if ( encoding == wxFONTENCODING_DEFAULT )
    {
        return _("default");
    }

    const size_t count = WXSIZEOF(gs_encodingNames);

    for ( size_t i = 0; i < count; i++ )
    {
        if ( gs_encodings[i] == encoding )
        {
            return gs_encodingNames[i][0];
        }
    }

    wxString str;
    str.Printf(_("unknown-%d"), encoding);

    return str;
}

/* static */
const wxChar** wxFontMapperBase::GetAllEncodingNames(wxFontEncoding encoding)
{
    static const wxChar* dummy[] = { NULL };

    for ( size_t i = 0; i < WXSIZEOF(gs_encodingNames); i++ )
    {
        if ( gs_encodings[i] == encoding )
        {
            return gs_encodingNames[i];
        }
    }

    return dummy;
}

/* static */
wxFontEncoding wxFontMapperBase::GetEncodingFromName(const wxString& name)
{
    const size_t count = WXSIZEOF(gs_encodingNames);

    for ( size_t i = 0; i < count; i++ )
    {
        for ( const wxChar** encName = gs_encodingNames[i]; *encName; ++encName )
        {
            if ( name.CmpNoCase(*encName) == 0 )
                return gs_encodings[i];
        }
    }

    return wxFONTENCODING_MAX;
}

#endif // wxUSE_FONTMAP