src/msw/fontutil.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/fontutil.cpp
   3 // Purpose:     font-related helper functions for wxMSW
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     05.11.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "fontutil.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 #ifndef WX_PRECOMP
  32     #include "wx/string.h"
  33     #include "wx/log.h"
  34     #include "wx/intl.h"
  35     #include "wx/encinfo.h"
  36 #endif //WX_PRECOMP
  37
  38 #include "wx/msw/private.h"
  39
  40 #include "wx/fontutil.h"
  41 #include "wx/fontmap.h"
  42
  43 #include "wx/tokenzr.h"
  44
  45 // for MSVC5 and old w32api
  46 #ifndef HANGUL_CHARSET
  47 #    define HANGUL_CHARSET  129
  48 #endif
  49
  50 // ============================================================================
  51 // implementation
  52 // ============================================================================
  53
  54 // ----------------------------------------------------------------------------
  55 // wxNativeEncodingInfo
  56 // ----------------------------------------------------------------------------
  57
  58 // convert to/from the string representation: format is
  59 //      encodingid;facename[;charset]
  60
  61 bool wxNativeEncodingInfo::FromString(const wxString& s)
  62 {
  63     wxStringTokenizer tokenizer(s, _T(";"));
  64
  65     wxString encid = tokenizer.GetNextToken();
  66
  67     // we support 2 formats: the old one (and still used if !wxUSE_FONTMAP)
  68     // used the raw encoding values but the new one uses the encoding names
  69     long enc;
  70     if ( encid.ToLong(&enc) )
  71     {
  72         // old format, intepret as encoding -- but after minimal checks
  73         if ( enc < 0 || enc >= wxFONTENCODING_MAX )
  74             return false;
  75
  76         encoding = (wxFontEncoding)enc;
  77     }
  78     else // not a number, interpret as an encoding name
  79     {
  80 #if wxUSE_FONTMAP
  81         encoding = wxFontMapper::GetEncodingFromName(encid);
  82         if ( encoding == wxFONTENCODING_MAX )
  83 #endif // wxUSE_FONTMAP
  84         {
  85             // failed to parse the name (or couldn't even try...)
  86             return false;
  87         }
  88     }
  89
  90     facename = tokenizer.GetNextToken();
  91
  92     wxString tmp = tokenizer.GetNextToken();
  93     if ( tmp.empty() )
  94     {
  95         // default charset: but don't use DEFAULT_CHARSET here because it might
  96         // be different from the machine on which the file we had read this
  97         // encoding desc from was created
  98         charset = ANSI_CHARSET;
  99     }
 100     else
 101     {
 102         if ( wxSscanf(tmp, _T("%u"), &charset) != 1 )
 103         {
 104             // should be a number!
 105             return FALSE;
 106         }
 107     }
 108
 109     return TRUE;
 110 }
 111
 112 wxString wxNativeEncodingInfo::ToString() const
 113 {
 114     wxString s;
 115
 116     s
 117 #if wxUSE_FONTMAP
 118       // use the encoding names as this is safer than using the numerical
 119       // values which may change with time (because new encodings are
 120       // inserted...)
 121       << wxFontMapper::GetEncodingName(encoding)
 122 #else // !wxUSE_FONTMAP
 123       // we don't have any choice but to use the raw value
 124       << (long)encoding
 125 #endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
 126       << _T(';') << facename;
 127
 128     // ANSI_CHARSET is assumed anyhow
 129     if ( charset != ANSI_CHARSET )
 130     {
 131          s << _T(';') << charset;
 132     }
 133
 134     return s;
 135 }
 136
 137 // ----------------------------------------------------------------------------
 138 // helper functions
 139 // ----------------------------------------------------------------------------
 140
 141 bool wxGetNativeFontEncoding(wxFontEncoding encoding,
 142                              wxNativeEncodingInfo *info)
 143 {
 144     wxCHECK_MSG( info, FALSE, _T("bad pointer in wxGetNativeFontEncoding") );
 145
 146     if ( encoding == wxFONTENCODING_DEFAULT )
 147     {
 148         encoding = wxFont::GetDefaultEncoding();
 149     }
 150
 151     extern WXDLLIMPEXP_BASE long wxEncodingToCharset(wxFontEncoding encoding);
 152     info->charset = wxEncodingToCharset(encoding);
 153     if ( info->charset == -1 )
 154         return FALSE;
 155
 156     info->encoding = encoding;
 157
 158     return TRUE;
 159 }
 160
 161 bool wxTestFontEncoding(const wxNativeEncodingInfo& info)
 162 {
 163     // try to create such font
 164     LOGFONT lf;
 165     wxZeroMemory(lf);       // all default values
 166
 167     lf.lfCharSet = info.charset;
 168     wxStrncpy(lf.lfFaceName, info.facename, WXSIZEOF(lf.lfFaceName));
 169
 170     HFONT hfont = ::CreateFontIndirect(&lf);
 171     if ( !hfont )
 172     {
 173         // no such font
 174         return FALSE;
 175     }
 176
 177     ::DeleteObject((HGDIOBJ)hfont);
 178
 179     return TRUE;
 180 }
 181
 182 // ----------------------------------------------------------------------------
 183 // wxFontEncoding <-> CHARSET_XXX
 184 // ----------------------------------------------------------------------------
 185
 186 wxFontEncoding wxGetFontEncFromCharSet(int cs)
 187 {
 188     wxFontEncoding fontEncoding;
 189
 190     switch ( cs )
 191     {
 192         default:
 193             // assume the system charset
 194             fontEncoding = wxFONTENCODING_SYSTEM;
 195             break;
 196
 197         case ANSI_CHARSET:
 198             fontEncoding = wxFONTENCODING_CP1252;
 199             break;
 200
 201 #if defined(__WIN32__) && !defined(__WXMICROWIN__)
 202         case EASTEUROPE_CHARSET:
 203             fontEncoding = wxFONTENCODING_CP1250;
 204             break;
 205
 206         case BALTIC_CHARSET:
 207             fontEncoding = wxFONTENCODING_CP1257;
 208             break;
 209
 210         case RUSSIAN_CHARSET:
 211             fontEncoding = wxFONTENCODING_CP1251;
 212             break;
 213
 214         case ARABIC_CHARSET:
 215             fontEncoding = wxFONTENCODING_CP1256;
 216             break;
 217
 218         case GREEK_CHARSET:
 219             fontEncoding = wxFONTENCODING_CP1253;
 220             break;
 221
 222         case HEBREW_CHARSET:
 223             fontEncoding = wxFONTENCODING_CP1255;
 224             break;
 225
 226         case TURKISH_CHARSET:
 227             fontEncoding = wxFONTENCODING_CP1254;
 228             break;
 229
 230         case THAI_CHARSET:
 231             fontEncoding = wxFONTENCODING_CP437;
 232             break;
 233
 234         case SHIFTJIS_CHARSET:
 235             fontEncoding = wxFONTENCODING_CP932;
 236             break;
 237
 238         case GB2312_CHARSET:
 239             fontEncoding = wxFONTENCODING_CP936;
 240             break;
 241
 242         case HANGUL_CHARSET:
 243             fontEncoding = wxFONTENCODING_CP949;
 244             break;
 245
 246         case CHINESEBIG5_CHARSET:
 247             fontEncoding = wxFONTENCODING_CP950;
 248             break;
 249
 250 #endif // Win32
 251
 252         case OEM_CHARSET:
 253             fontEncoding = wxFONTENCODING_CP437;
 254             break;
 255     }
 256
 257     return fontEncoding;
 258 }
 259
 260 // ----------------------------------------------------------------------------
 261 // wxFont <-> LOGFONT conversion
 262 // ----------------------------------------------------------------------------
 263
 264 void wxFillLogFont(LOGFONT *logFont, const wxFont *font)
 265 {
 266     wxNativeFontInfo fi;
 267
 268     // maybe we already have LOGFONT for this font?
 269     const wxNativeFontInfo *pFI = font->GetNativeFontInfo();
 270     if ( !pFI )
 271     {
 272         // use wxNativeFontInfo methods to build a LOGFONT for this font
 273         fi.InitFromFont(*font);
 274
 275         pFI = &fi;
 276     }
 277
 278     // transfer all the data to LOGFONT
 279     *logFont = pFI->lf;
 280 }
 281
 282 wxFont wxCreateFontFromLogFont(const LOGFONT *logFont)
 283 {
 284     wxNativeFontInfo info;
 285
 286     info.lf = *logFont;
 287
 288     return wxFont(info);
 289 }
 290