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;

    DECLARE_NO_COPY_CLASS(ReentrancyBlocker)
};

// ============================================================================
// 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	DECLARE_NO_COPY_CLASS(ReentrancyBlocker)
	90	};
	91
	92	// ============================================================================
	93	// implementation
	94	// ============================================================================
	95
	96	// ----------------------------------------------------------------------------
	97	// ctor and dtor
	98	// ----------------------------------------------------------------------------
	99
	100	wxFontMapper::wxFontMapper()
	101	{
	102	m_windowParent = NULL;
	103	}
	104
	105	wxFontMapper::~wxFontMapper()
	106	{
	107	}
	108
	109	wxFontEncoding
	110	wxFontMapper::CharsetToEncoding(const wxString& charset, bool interactive)
	111	{
	112	// try the ways not needing the users intervention first
	113	int encoding = wxFontMapperBase::NonInteractiveCharsetToEncoding(charset);
	114
	115	// if we failed to find the encoding, ask the user -- unless disabled
	116	if ( encoding == wxFONTENCODING_UNKNOWN )
	117	{
	118	// this is the special value which disables asking the user (he had
	119	// chosen to suppress this the last time)
	120	encoding = wxFONTENCODING_SYSTEM;
	121	}
	122	else if ( (encoding == wxFONTENCODING_SYSTEM) && interactive )
	123	{
	124	// prepare the dialog data
	125
	126	// the dialog title
	127	wxString title(m_titleDialog);
	128	if ( !title )
	129	title << wxTheApp->GetAppName() << _(": unknown charset");
	130
	131	// the message
	132	wxString msg;
	133	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());
	134
	135	// the list of choices
	136	const size_t count = GetSupportedEncodingsCount();
	137
	138	wxString *encodingNamesTranslated = new wxString[count];
	139
	140	for ( size_t i = 0; i < count; i++ )
	141	{
	142	encodingNamesTranslated[i] = GetEncodingDescription(GetEncoding(i));
	143	}
	144
	145	// the parent window
	146	wxWindow *parent = m_windowParent;
	147	if ( !parent )
	148	parent = wxTheApp->GetTopWindow();
	149
	150	// do ask the user and get back the index in encodings table
	151	int n = wxGetSingleChoiceIndex(msg, title,
	152	count,
	153	encodingNamesTranslated,
	154	parent);
	155
	156	delete [] encodingNamesTranslated;
	157
	158	if ( n != -1 )
	159	{
	160	encoding = GetEncoding(n);
	161	}
	162
	163	#if wxUSE_CONFIG && wxUSE_FILECONFIG
	164	// save the result in the config now
	165	wxFontMapperPathChanger path(this, FONTMAPPER_CHARSET_PATH);
	166	if ( path.IsOk() )
	167	{
	168	wxConfigBase *config = GetConfig();
	169
	170	// remember the alt encoding for this charset -- or remember that
	171	// we don't know it
	172	long value = n == -1 ? wxFONTENCODING_UNKNOWN : (long)encoding;
	173	if ( !config->Write(charset, value) )
	174	{
	175	wxLogError(_("Failed to remember the encoding for the charset '%s'."), charset.c_str());
	176	}
	177	}
	178	#endif // wxUSE_CONFIG
	179	}
	180
	181	return (wxFontEncoding)encoding;
	182	}
	183
	184	// ----------------------------------------------------------------------------
	185	// support for unknown encodings: we maintain a map between the
	186	// (platform-specific) strings identifying them and our wxFontEncodings they
	187	// correspond to which is used by GetFontForEncoding() function
	188	// ----------------------------------------------------------------------------
	189
	190	bool wxFontMapper::TestAltEncoding(const wxString& configEntry,
	191	wxFontEncoding encReplacement,
	192	wxNativeEncodingInfo *info)
	193	{
	194	if ( wxGetNativeFontEncoding(encReplacement, info) &&
	195	wxTestFontEncoding(*info) )
	196	{
	197	#if wxUSE_CONFIG && wxUSE_FILECONFIG
	198	// remember the mapping in the config
	199	wxFontMapperPathChanger path(this, FONTMAPPER_FONT_FROM_ENCODING_PATH);
	200
	201	if ( path.IsOk() )
	202	{
	203	GetConfig()->Write(configEntry, info->ToString());
	204	}
	205	#endif // wxUSE_CONFIG
	206	return true;
	207	}
	208
	209	return false;
	210	}
	211
	212	bool wxFontMapper::GetAltForEncoding(wxFontEncoding encoding,
	213	wxNativeEncodingInfo *info,
	214	const wxString& facename,
	215	bool interactive)
	216	{
	217	#if wxUSE_GUI
	218	// we need a flag to prevent infinite recursion which happens, for
	219	// example, when GetAltForEncoding() is called from an OnPaint() handler:
	220	// in this case, wxYield() which is called from wxMessageBox() we use here
	221	// will lead to another call of OnPaint() and hence to another call of
	222	// GetAltForEncoding() -- and it is impossible to catch this from the user
	223	// code because we are called from wxFont ctor implicitly.
	224
	225	// assume we're always called from the main thread, so that it is safe to
	226	// use a static var
	227	static bool s_inGetAltForEncoding = false;
	228
	229	if ( interactive && s_inGetAltForEncoding )
	230	return false;
	231
	232	ReentrancyBlocker blocker(s_inGetAltForEncoding);
	233	#endif // wxUSE_GUI
	234
	235	wxCHECK_MSG( info, false, wxT("bad pointer in GetAltForEncoding") );
	236
	237	info->facename = facename;
	238
	239	if ( encoding == wxFONTENCODING_DEFAULT )
	240	{
	241	encoding = wxFont::GetDefaultEncoding();
	242	}
	243
	244	// if we failed to load the system default encoding, something is really
	245	// wrong and we'd better stop now -- otherwise we will go into endless
	246	// recursion trying to create the font in the msg box with the error
	247	// message
	248	if ( encoding == wxFONTENCODING_SYSTEM )
	249	{
	250	wxLogFatalError(_("can't load any font, aborting"));
	251
	252	// wxLogFatalError doesn't return
	253	}
	254
	255	wxString configEntry,
	256	encName = GetEncodingName(encoding);
	257	if ( !!facename )
	258	{
	259	configEntry = facename + _T("_");
	260	}
	261	configEntry += encName;
	262
	263	#if wxUSE_CONFIG && wxUSE_FILECONFIG
	264	// do we have a font spec for this encoding?
	265	wxString fontinfo;
	266	wxFontMapperPathChanger path(this, FONTMAPPER_FONT_FROM_ENCODING_PATH);
	267	if ( path.IsOk() )
	268	{
	269	fontinfo = GetConfig()->Read(configEntry);
	270	}
	271
	272	// this special value means that we don't know of fonts for this
	273	// encoding but, moreover, have already asked the user as well and he
	274	// didn't specify any font neither
	275	if ( fontinfo == FONTMAPPER_FONT_DONT_ASK )
	276	{
	277	interactive = false;
	278	}
	279	else // use the info entered the last time
	280	{
	281	if ( !!fontinfo && !!facename )
	282	{
	283	// we tried to find a match with facename -- now try without it
	284	fontinfo = GetConfig()->Read(encName);
	285	}
	286
	287	if ( !!fontinfo )
	288	{
	289	if ( info->FromString(fontinfo) )
	290	{
	291	if ( wxTestFontEncoding(*info) )
	292	{
	293	// ok, got something
	294	return true;
	295	}
	296	//else: no such fonts, look for something else
	297	// (should we erase the outdated value?)
	298	}
	299	else
	300	{
	301	wxLogDebug(wxT("corrupted config data: string '%s' is not a valid font encoding info"),
	302	fontinfo.c_str());
	303	}
	304	}
	305	//else: there is no information in config about this encoding
	306	}
	307	#endif // wxUSE_CONFIG
	308
	309	// now try to map this encoding to a compatible one which we have on this
	310	// system
	311	wxFontEncodingArray equiv = wxEncodingConverter::GetAllEquivalents(encoding);
	312	size_t count = equiv.GetCount();
	313	bool foundEquivEncoding = false;
	314	wxFontEncoding equivEncoding = wxFONTENCODING_SYSTEM;
	315	if ( count )
	316	{
	317	for ( size_t i = 0; i < count && !foundEquivEncoding; i++ )
	318	{
	319	// don't test for encoding itself, we already know we don't have it
	320	if ( equiv[i] == encoding )
	321	continue;
	322
	323	if ( TestAltEncoding(configEntry, equiv[i], info) )
	324	{
	325	equivEncoding = equiv[i];
	326
	327	foundEquivEncoding = true;
	328	}
	329	}
	330	}
	331
	332	// ask the user
	333	#if wxUSE_FONTDLG
	334	if ( interactive )
	335	{
	336	wxString title(m_titleDialog);
	337	if ( !title )
	338	title << wxTheApp->GetAppName() << _(": unknown encoding");
	339
	340	// built the message
	341	wxString encDesc = GetEncodingDescription(encoding),
	342	msg;
	343	if ( foundEquivEncoding )
	344	{
	345	// ask the user if he wants to override found alternative encoding
	346	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)?"),
	347	encDesc.c_str(), GetEncodingDescription(equivEncoding).c_str());
	348	}
	349	else
	350	{
	351	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)?"),
	352	encDesc.c_str());
	353	}
	354
	355	// the question is different in 2 cases so the answer has to be
	356	// interpreted differently as well
	357	int answer = foundEquivEncoding ? wxNO : wxYES;
	358
	359	if ( wxMessageBox(msg, title,
	360	wxICON_QUESTION \| wxYES_NO,
	361	m_windowParent) == answer )
	362	{
	363	wxFontData data;
	364	data.SetEncoding(encoding);
	365	data.EncodingInfo() = *info;
	366	wxFontDialog dialog(m_windowParent, data);
	367	if ( dialog.ShowModal() == wxID_OK )
	368	{
	369	wxFontData retData = dialog.GetFontData();
	370	wxFont font = retData.GetChosenFont();
	371
	372	*info = retData.EncodingInfo();
	373	info->encoding = retData.GetEncoding();
	374
	375	#if wxUSE_CONFIG && wxUSE_FILECONFIG
	376	// remember this in the config
	377	wxFontMapperPathChanger path(this,
	378	FONTMAPPER_FONT_FROM_ENCODING_PATH);
	379	if ( path.IsOk() )
	380	{
	381	GetConfig()->Write(configEntry, info->ToString());
	382	}
	383	#endif // wxUSE_CONFIG
	384
	385	return true;
	386	}
	387	//else: the user canceled the font selection dialog
	388	}
	389	else
	390	{
	391	// the user doesn't want to select a font for this encoding
	392	// or selected to use equivalent encoding
	393	//
	394	// remember it to avoid asking the same question again later
	395	#if wxUSE_CONFIG && wxUSE_FILECONFIG
	396	wxFontMapperPathChanger path(this,
	397	FONTMAPPER_FONT_FROM_ENCODING_PATH);
	398	if ( path.IsOk() )
	399	{
	400	GetConfig()->Write
	401	(
	402	configEntry,
	403	foundEquivEncoding ? info->ToString().c_str()
	404	: FONTMAPPER_FONT_DONT_ASK
	405	);
	406	}
	407	#endif // wxUSE_CONFIG
	408	}
	409	}
	410	//else: we're in non-interactive mode
	411	#endif // wxUSE_FONTDLG
	412
	413	return foundEquivEncoding;
	414	}
	415
	416	bool wxFontMapper::GetAltForEncoding(wxFontEncoding encoding,
	417	wxFontEncoding *encodingAlt,
	418	const wxString& facename,
	419	bool interactive)
	420	{
	421	wxNativeEncodingInfo info;
	422	if ( !GetAltForEncoding(encoding, &info, facename, interactive) )
	423	return false;
	424
	425	wxCHECK_MSG( encodingAlt, false,
	426	_T("wxFontEncoding::GetAltForEncoding(): NULL pointer") );
	427
	428	*encodingAlt = info.encoding;
	429
	430	return true;
	431	}
	432
	433	bool wxFontMapper::IsEncodingAvailable(wxFontEncoding encoding,
	434	const wxString& facename)
	435	{
	436	wxNativeEncodingInfo info;
	437
	438	if ( !wxGetNativeFontEncoding(encoding, &info) )
	439	return false;
	440
	441	info.facename = facename;
	442	return wxTestFontEncoding(info);
	443	}
	444
	445	#endif // wxUSE_FONTMAP