/////////////////////////////////////////////////////////////////////////////
// Name: src/common/fontmap.cpp
// Purpose: wxFontMapper class
// Author: Vadim Zeitlin
// Modified by:
// Created: 04.11.99
// Copyright: (c) 1999-2003 Vadim Zeitlin <vadim@wxwindows.org>
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_FONTMAP
#include "wx/fontmap.h"
#ifndef WX_PRECOMP
#include "wx/app.h"
#include "wx/log.h"
#include "wx/intl.h"
#include "wx/msgdlg.h"
#include "wx/choicdlg.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/fmappriv.h"
#include "wx/fontutil.h"
#include "wx/fontdlg.h"
#include "wx/encinfo.h"
#include "wx/encconv.h"
// ----------------------------------------------------------------------------
// XTI
// ----------------------------------------------------------------------------
wxBEGIN_ENUM( wxFontEncoding )
wxENUM_MEMBER( wxFONTENCODING_SYSTEM )
wxENUM_MEMBER( wxFONTENCODING_DEFAULT )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_1 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_2 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_3 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_4 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_5 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_6 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_7 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_8 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_9 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_10 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_11 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_12 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_13 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_14 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_15 )
wxENUM_MEMBER( wxFONTENCODING_ISO8859_MAX )
wxENUM_MEMBER( wxFONTENCODING_KOI8 )
wxENUM_MEMBER( wxFONTENCODING_KOI8_U )
wxENUM_MEMBER( wxFONTENCODING_ALTERNATIVE )
wxENUM_MEMBER( wxFONTENCODING_BULGARIAN )
wxENUM_MEMBER( wxFONTENCODING_CP437 )
wxENUM_MEMBER( wxFONTENCODING_CP850 )
wxENUM_MEMBER( wxFONTENCODING_CP852 )
wxENUM_MEMBER( wxFONTENCODING_CP855 )
wxENUM_MEMBER( wxFONTENCODING_CP866 )
wxENUM_MEMBER( wxFONTENCODING_CP874 )
wxENUM_MEMBER( wxFONTENCODING_CP932 )
wxENUM_MEMBER( wxFONTENCODING_CP936 )
wxENUM_MEMBER( wxFONTENCODING_CP949 )
wxENUM_MEMBER( wxFONTENCODING_CP950 )
wxENUM_MEMBER( wxFONTENCODING_CP1250 )
wxENUM_MEMBER( wxFONTENCODING_CP1251 )
wxENUM_MEMBER( wxFONTENCODING_CP1252 )
wxENUM_MEMBER( wxFONTENCODING_CP1253 )
wxENUM_MEMBER( wxFONTENCODING_CP1254 )
wxENUM_MEMBER( wxFONTENCODING_CP1255 )
wxENUM_MEMBER( wxFONTENCODING_CP1256 )
wxENUM_MEMBER( wxFONTENCODING_CP1257 )
wxENUM_MEMBER( wxFONTENCODING_CP1258 )
wxENUM_MEMBER( wxFONTENCODING_CP1361 )
wxENUM_MEMBER( wxFONTENCODING_CP12_MAX )
wxENUM_MEMBER( wxFONTENCODING_UTF7 )
wxENUM_MEMBER( wxFONTENCODING_UTF8 )
wxENUM_MEMBER( wxFONTENCODING_GB2312 )
wxENUM_MEMBER( wxFONTENCODING_BIG5 )
wxENUM_MEMBER( wxFONTENCODING_SHIFT_JIS )
wxENUM_MEMBER( wxFONTENCODING_EUC_JP )
wxENUM_MEMBER( wxFONTENCODING_UNICODE )
wxEND_ENUM( wxFontEncoding )
// ----------------------------------------------------------------------------
// 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;
wxDECLARE_NO_COPY_CLASS(ReentrancyBlocker);
};
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// ctor and dtor
// ----------------------------------------------------------------------------
wxFontMapper::wxFontMapper()
{
m_windowParent = NULL;
}
wxFontMapper::~wxFontMapper()
{
}
/* static */
wxFontMapper *wxFontMapper::Get()
{
wxFontMapperBase *fontmapper = wxFontMapperBase::Get();
wxASSERT_MSG( !fontmapper->IsDummy(),
wxT("GUI code requested a wxFontMapper but we only have a wxFontMapperBase.") );
// Now return it anyway because there's a chance the GUI code might just
// only want to call wxFontMapperBase functions and it's better than
// crashing by returning NULL
return (wxFontMapper *)fontmapper;
}
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;
}
#if wxUSE_CHOICEDLG
else if ( (encoding == wxFONTENCODING_SYSTEM) && interactive )
{
// prepare the dialog data
// the dialog title
wxString title(m_titleDialog);
if ( !title )
title << wxTheApp->GetAppDisplayName() << _(": 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);
// 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 ? (long)wxFONTENCODING_UNKNOWN : (long)encoding;
if ( !config->Write(charset, value) )
{
wxLogError(_("Failed to remember the encoding for the charset '%s'."), charset);
}
}
#endif // wxUSE_CONFIG
}
#else
wxUnusedVar(interactive);
#endif // wxUSE_CHOICEDLG
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());
}
#else
wxUnusedVar(configEntry);
#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.empty() )
{
configEntry = facename + wxT("_");
}
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.empty() && !facename.empty() )
{
// we tried to find a match with facename -- now try without it
fontinfo = GetConfig()->Read(encName);
}
if ( !fontinfo.empty() )
{
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);
}
}
//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->GetAppDisplayName() << _(": 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, GetEncodingDescription(equivEncoding));
}
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);
}
// 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();
*info = retData.EncodingInfo();
info->encoding = retData.GetEncoding();
#if wxUSE_CONFIG && wxUSE_FILECONFIG
// remember this in the config
wxFontMapperPathChanger path2(this,
FONTMAPPER_FONT_FROM_ENCODING_PATH);
if ( path2.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 path2(this,
FONTMAPPER_FONT_FROM_ENCODING_PATH);
if ( path2.IsOk() )
{
GetConfig()->Write
(
configEntry,
foundEquivEncoding
? (const wxChar*)info->ToString().c_str()
: FONTMAPPER_FONT_DONT_ASK
);
}
#endif // wxUSE_CONFIG
}
}
//else: we're in non-interactive mode
#else
wxUnusedVar(equivEncoding);
#endif // wxUSE_FONTDLG
return foundEquivEncoding;
}
bool wxFontMapper::GetAltForEncoding(wxFontEncoding encoding,
wxFontEncoding *encodingAlt,
const wxString& facename,
bool interactive)
{
wxCHECK_MSG( encodingAlt, false,
wxT("wxFontEncoding::GetAltForEncoding(): NULL pointer") );
wxNativeEncodingInfo info;
if ( !GetAltForEncoding(encoding, &info, facename, interactive) )
return false;
*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
↑ V547 Expression '!title' is always false.
↑ V547 Expression '!title' is always false.