src/common/encconv.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        encconv.cpp
   3 // Purpose:     wxEncodingConverter class for converting between different
   4 //              font encodings
   5 // Author:      Vaclav Slavik
   6 // Copyright:   (c) 1999 Vaclav Slavik
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "encconv.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #ifdef __BORLANDC__
  18   #pragma hdrstop
  19 #endif
  20
  21 #if wxUSE_FONTMAP
  22
  23 #include "wx/encconv.h"
  24
  25 #include <stdlib.h>
  26
  27 // conversion tables, generated by scripts in $(WXWIN)/misc/unictabl:
  28 #if defined( __BORLANDC__ ) || defined(__DARWIN__)
  29     #include "../common/unictabl.inc"
  30 #else
  31     #include "unictabl.inc"
  32 #endif
  33
  34 #if wxUSE_WCHAR_T
  35     typedef wchar_t tchar;
  36 #else
  37     typedef char tchar;
  38 #endif
  39
  40 #ifdef __WXMAC__
  41     #include <ATSUnicode.h>
  42     #include <TextCommon.h>
  43     #include <TextEncodingConverter.h>
  44
  45     #include "wx/fontutil.h"
  46     #include "wx/mac/private.h"  // includes mac headers
  47
  48     wxUint16 gMacEncodings[wxFONTENCODING_MACMAX-wxFONTENCODING_MACMIN+1][128] ;
  49     bool gMacEncodingsInited[wxFONTENCODING_MACMAX-wxFONTENCODING_MACMIN+1] ;
  50 #endif
  51
  52 #ifdef __WXWINCE__
  53     #include "wx/msw/wince/missing.h"       // for bsearch()
  54 #endif
  55
  56 static wxUint16* GetEncTable(wxFontEncoding enc)
  57 {
  58 #ifdef __WXMAC__
  59     if( enc >= wxFONTENCODING_MACMIN && enc <= wxFONTENCODING_MACMAX )
  60     {
  61         int i = enc-wxFONTENCODING_MACMIN ;
  62         if ( gMacEncodingsInited[i] == false )
  63         {
  64             TECObjectRef converter ;
  65             TextEncodingBase code = wxMacGetSystemEncFromFontEnc( enc ) ;
  66                 TextEncodingBase unicode = CreateTextEncoding(kTextEncodingUnicodeDefault,0,kUnicode16BitFormat) ;
  67             OSStatus status = TECCreateConverter(&converter,code,unicode);
  68             char s[2] ;
  69             s[1] = 0 ;
  70             ByteCount byteInLen, byteOutLen ;
  71             for( unsigned char c = 255 ; c >= 128 ; --c )
  72             {
  73                 s[0] = c ;
  74                 status = TECConvertText(converter, (ConstTextPtr) &s , 1, &byteInLen,
  75                 (TextPtr) &gMacEncodings[i][c-128] , 2, &byteOutLen);
  76             }
  77             status = TECDisposeConverter(converter);
  78             gMacEncodingsInited[i]=true;
  79         }
  80         return gMacEncodings[i] ;
  81     }
  82 #endif
  83
  84     for (int i = 0; encodings_list[i].table != NULL; i++)
  85     {
  86         if (encodings_list[i].encoding == enc)
  87             return encodings_list[i].table;
  88     }
  89     return NULL;
  90 }
  91
  92 typedef struct {
  93     wxUint16 u;
  94     wxUint8  c;
  95 } CharsetItem;
  96
  97 extern "C" int wxCMPFUNC_CONV
  98 CompareCharsetItems(const void *i1, const void *i2)
  99 {
 100     return ( ((CharsetItem*)i1) -> u - ((CharsetItem*)i2) -> u );
 101 }
 102
 103
 104 static CharsetItem* BuildReverseTable(wxUint16 *tbl)
 105 {
 106     CharsetItem *rev = new CharsetItem[128];
 107
 108     for (int i = 0; i < 128; i++)
 109         rev[i].c = 128 + i, rev[i].u = tbl[i];
 110
 111     qsort(rev, 128, sizeof(CharsetItem), CompareCharsetItems);
 112
 113     return rev;
 114 }
 115
 116
 117
 118 wxEncodingConverter::wxEncodingConverter()
 119 {
 120     m_Table = NULL;
 121     m_UnicodeInput = m_UnicodeOutput = FALSE;
 122     m_JustCopy = FALSE;
 123 }
 124
 125
 126
 127 bool wxEncodingConverter::Init(wxFontEncoding input_enc, wxFontEncoding output_enc, int method)
 128 {
 129     unsigned i;
 130     wxUint16 *in_tbl, *out_tbl = NULL;
 131
 132     if (m_Table) {delete[] m_Table; m_Table = NULL;}
 133
 134 #if !wxUSE_WCHAR_T
 135     if (input_enc == wxFONTENCODING_UNICODE || output_enc == wxFONTENCODING_UNICODE) return FALSE;
 136 #endif
 137
 138     if (input_enc == output_enc) {m_JustCopy = TRUE; return TRUE;}
 139
 140     m_UnicodeOutput = (output_enc == wxFONTENCODING_UNICODE);
 141     m_JustCopy = FALSE;
 142
 143     if (input_enc == wxFONTENCODING_UNICODE)
 144     {
 145         if ((out_tbl = GetEncTable(output_enc)) == NULL) return FALSE;
 146
 147         m_Table = new tchar[65536];
 148         for (i = 0; i < 128; i++)  m_Table[i] = (tchar)i; // 7bit ASCII
 149         for (i = 128; i < 65536; i++)  m_Table[i] = (tchar)'?';
 150                 // FIXME - this should be character that means `unicode to charset' impossible, not '?'
 151
 152         if (method == wxCONVERT_SUBSTITUTE)
 153         {
 154             for (i = 0; i < encoding_unicode_fallback_count; i++)
 155                 m_Table[encoding_unicode_fallback[i].c] = (tchar) encoding_unicode_fallback[i].s;
 156         }
 157
 158         for (i = 0; i < 128; i++)
 159             m_Table[out_tbl[i]] = (tchar)(128 + i);
 160
 161         m_UnicodeInput = TRUE;
 162     }
 163     else // input !Unicode
 164     {
 165         if ((in_tbl = GetEncTable(input_enc)) == NULL) return FALSE;
 166         if (output_enc != wxFONTENCODING_UNICODE)
 167             if ((out_tbl = GetEncTable(output_enc)) == NULL) return FALSE;
 168
 169         m_UnicodeInput = FALSE;
 170
 171         m_Table = new tchar[256];
 172         for (i = 0; i < 128; i++)  m_Table[i] = (tchar)i; // 7bit ASCII
 173
 174         if (output_enc == wxFONTENCODING_UNICODE)
 175         {
 176             for (i = 0; i < 128; i++)  m_Table[128 + i] = (tchar)in_tbl[i];
 177             return TRUE;
 178         }
 179         else // output !Unicode
 180         {
 181             CharsetItem *rev = BuildReverseTable(out_tbl);
 182             CharsetItem *item;
 183             CharsetItem key;
 184
 185             for (i = 0; i < 128; i++)
 186             {
 187                 key.u = in_tbl[i];
 188                 item = (CharsetItem*) bsearch(&key, rev, 128, sizeof(CharsetItem), CompareCharsetItems);
 189                 if (item == NULL && method == wxCONVERT_SUBSTITUTE)
 190                     item = (CharsetItem*) bsearch(&key, encoding_unicode_fallback,
 191                                 encoding_unicode_fallback_count, sizeof(CharsetItem), CompareCharsetItems);
 192                 if (item)
 193                     m_Table[128 + i] = (tchar)item -> c;
 194                 else
 195 #if wxUSE_WCHAR_T
 196                     m_Table[128 + i] = (wchar_t)(128 + i);
 197 #else
 198                     m_Table[128 + i] = (char)(128 + i);
 199 #endif
 200             }
 201
 202             delete[] rev;
 203         }
 204     }
 205
 206     return TRUE;
 207 }
 208
 209
 210
 211 void wxEncodingConverter::Convert(const char* input, char* output) const
 212 {
 213     wxASSERT_MSG(!m_UnicodeOutput, wxT("You cannot convert to unicode if output is const char*!"));
 214     wxASSERT_MSG(!m_UnicodeInput, wxT("You cannot convert from unicode if input is const char*!"));
 215
 216     const char *i;
 217     char *o;
 218
 219     if (m_JustCopy)
 220     {
 221         strcpy(output, input);
 222         return;
 223     }
 224
 225     wxCHECK_RET(m_Table != NULL, wxT("You must call wxEncodingConverter::Init() before actually converting!"));
 226
 227     for (i = input, o = output; *i != 0;)
 228         *(o++) = (char)(m_Table[(wxUint8)*(i++)]);
 229     *o = 0;
 230 }
 231
 232
 233 #if wxUSE_WCHAR_T
 234
 235 void wxEncodingConverter::Convert(const char* input, wchar_t* output) const
 236 {
 237     wxASSERT_MSG(m_UnicodeOutput, wxT("You cannot convert to 8-bit if output is const wchar_t*!"));
 238     wxASSERT_MSG(!m_UnicodeInput, wxT("You cannot convert from unicode if input is const char*!"));
 239
 240     const char *i;
 241     wchar_t *o;
 242
 243     if (m_JustCopy)
 244     {
 245         for (i = input, o = output; *i != 0;)
 246             *(o++) = (wchar_t)(*(i++));
 247         *o = 0;
 248         return;
 249     }
 250
 251     wxCHECK_RET(m_Table != NULL, wxT("You must call wxEncodingConverter::Init() before actually converting!"));
 252
 253     for (i = input, o = output; *i != 0;)
 254         *(o++) = (wchar_t)(m_Table[(wxUint8)*(i++)]);
 255     *o = 0;
 256 }
 257
 258
 259
 260 void wxEncodingConverter::Convert(const wchar_t* input, char* output) const
 261 {
 262     wxASSERT_MSG(!m_UnicodeOutput, wxT("You cannot convert to unicode if output is const char*!"));
 263     wxASSERT_MSG(m_UnicodeInput, wxT("You cannot convert from 8-bit if input is const wchar_t*!"));
 264
 265     const wchar_t *i;
 266     char *o;
 267
 268     if (m_JustCopy)
 269     {
 270         for (i = input, o = output; *i != 0;)
 271             *(o++) = (char)(*(i++));
 272         *o = 0;
 273         return;
 274     }
 275
 276     wxCHECK_RET(m_Table != NULL, wxT("You must call wxEncodingConverter::Init() before actually converting!"));
 277
 278     for (i = input, o = output; *i != 0;)
 279         *(o++) = (char)(m_Table[(wxUint16)*(i++)]);
 280     *o = 0;
 281 }
 282
 283
 284
 285 void wxEncodingConverter::Convert(const wchar_t* input, wchar_t* output) const
 286 {
 287     wxASSERT_MSG(m_UnicodeOutput, wxT("You cannot convert to 8-bit if output is const wchar_t*!"));
 288     wxASSERT_MSG(m_UnicodeInput, wxT("You cannot convert from 8-bit if input is const wchar_t*!"));
 289
 290     const wchar_t *i;
 291     wchar_t *o;
 292
 293     if (m_JustCopy)
 294     {
 295         // wcscpy() is not guaranteed to exist
 296         for (i = input, o = output; *i != 0;)
 297             *(o++) = (*(i++));
 298         *o = 0;
 299         return;
 300     }
 301
 302     wxCHECK_RET(m_Table != NULL, wxT("You must call wxEncodingConverter::Init() before actually converting!"));
 303
 304     for (i = input, o = output; *i != 0;)
 305         *(o++) = (wchar_t)(m_Table[(wxUint8)*(i++)]);
 306     *o = 0;
 307 }
 308
 309 #endif // wxUSE_WCHAR_T
 310
 311
 312 wxString wxEncodingConverter::Convert(const wxString& input) const
 313 {
 314     if (m_JustCopy) return input;
 315
 316     wxString s;
 317     const wxChar *i;
 318
 319     wxCHECK_MSG(m_Table != NULL, s,
 320                 wxT("You must call wxEncodingConverter::Init() before actually converting!"));
 321
 322     if (m_UnicodeInput)
 323     {
 324         for (i = input.c_str(); *i != 0; i++)
 325             s << (wxChar)(m_Table[(wxUint16)*i]);
 326     }
 327     else
 328     {
 329         for (i = input.c_str(); *i != 0; i++)
 330             s << (wxChar)(m_Table[(wxUint8)*i]);
 331     }
 332
 333     return s;
 334 }
 335
 336
 337
 338
 339
 340
 341
 342 // Following tables describe classes of encoding equivalence.
 343 //
 344
 345 #define STOP wxFONTENCODING_SYSTEM
 346
 347 #define NUM_OF_PLATFORMS  4 /*must conform to enum wxPLATFORM_XXXX !!!*/
 348 #define ENC_PER_PLATFORM  5
 349            // max no. of encodings for one language used on one platform
 350            // Anybody thinks 5 is not enough? ;-)
 351
 352 static wxFontEncoding
 353     EquivalentEncodings[][NUM_OF_PLATFORMS][ENC_PER_PLATFORM+1] = {
 354
 355     // *** Please put more common encodings as first! ***
 356
 357     // Western European
 358     {
 359         /* unix    */ {wxFONTENCODING_ISO8859_1, wxFONTENCODING_ISO8859_15, STOP},
 360         /* windows */ {wxFONTENCODING_CP1252, STOP},
 361         /* os2     */ {STOP},
 362         /* mac     */ {wxFONTENCODING_MACROMAN, STOP}
 363     },
 364
 365     // Central European
 366     {
 367         /* unix    */ {wxFONTENCODING_ISO8859_2, STOP},
 368         /* windows */ {wxFONTENCODING_CP1250, STOP},
 369         /* os2     */ {STOP},
 370         /* mac     */ {wxFONTENCODING_MACCENTRALEUR, STOP}
 371     },
 372
 373     // Baltic
 374     {
 375         /* unix    */ {wxFONTENCODING_ISO8859_13, wxFONTENCODING_ISO8859_4, STOP},
 376         /* windows */ {wxFONTENCODING_CP1257, STOP},
 377         /* os2     */ {STOP},
 378         /* mac     */ {STOP}
 379     },
 380
 381     // Hebrew
 382     {
 383         /* unix    */ {wxFONTENCODING_ISO8859_8, STOP},
 384         /* windows */ {wxFONTENCODING_CP1255, STOP},
 385         /* os2     */ {STOP},
 386         /* mac     */ {wxFONTENCODING_MACHEBREW, STOP}
 387     },
 388
 389     // Greek
 390     {
 391         /* unix    */ {wxFONTENCODING_ISO8859_7, STOP},
 392         /* windows */ {wxFONTENCODING_CP1253, STOP},
 393         /* os2     */ {STOP},
 394         /* mac     */ {wxFONTENCODING_MACGREEK, STOP}
 395     },
 396
 397     // Arabic
 398     {
 399         /* unix    */ {wxFONTENCODING_ISO8859_6, STOP},
 400         /* windows */ {wxFONTENCODING_CP1256, STOP},
 401         /* os2     */ {STOP},
 402         /* mac     */ {wxFONTENCODING_MACARABIC, STOP}
 403     },
 404
 405     // Turkish
 406     {
 407         /* unix    */ {wxFONTENCODING_ISO8859_9, STOP},
 408         /* windows */ {wxFONTENCODING_CP1254, STOP},
 409         /* os2     */ {STOP},
 410         /* mac     */ {wxFONTENCODING_MACTURKISH, STOP}
 411     },
 412
 413     // Cyrillic
 414     {
 415         /* unix    */ {wxFONTENCODING_KOI8, wxFONTENCODING_KOI8_U, wxFONTENCODING_ISO8859_5, STOP},
 416         /* windows */ {wxFONTENCODING_CP1251, STOP},
 417         /* os2     */ {STOP},
 418         /* mac     */ {wxFONTENCODING_MACCYRILLIC, STOP}
 419     },
 420
 421     {{STOP},{STOP},{STOP},{STOP}} /* Terminator */
 422     /* no, _not_ Arnold! */
 423 };
 424
 425
 426 static bool FindEncoding(const wxFontEncodingArray& arr, wxFontEncoding f)
 427 {
 428     for (wxFontEncodingArray::const_iterator it = arr.begin(), en = arr.end();
 429          it != en; ++it)
 430         if (*it == f)
 431             return true;
 432     return false;
 433 }
 434
 435 wxFontEncodingArray wxEncodingConverter::GetPlatformEquivalents(wxFontEncoding enc, int platform)
 436 {
 437     if (platform == wxPLATFORM_CURRENT)
 438     {
 439 #if defined(__WXMSW__)
 440         platform = wxPLATFORM_WINDOWS;
 441 #elif defined(__WXGTK__) || defined(__WXMOTIF__)
 442         platform = wxPLATFORM_UNIX;
 443 #elif defined(__WXOS2__)
 444         platform = wxPLATFORM_OS2;
 445 #elif defined(__WXMAC__)
 446         platform = wxPLATFORM_MAC;
 447 #endif
 448     }
 449
 450     int i, clas, e ;
 451     wxFontEncoding *f;
 452     wxFontEncodingArray arr;
 453
 454     clas = 0;
 455     while (EquivalentEncodings[clas][0][0] != STOP)
 456     {
 457         for (i = 0; i < NUM_OF_PLATFORMS; i++)
 458             for (e = 0; EquivalentEncodings[clas][i][e] != STOP; e++)
 459                 if (EquivalentEncodings[clas][i][e] == enc)
 460                 {
 461                     for (f = EquivalentEncodings[clas][platform]; *f != STOP; f++)
 462                         if (*f == enc) arr.push_back(enc);
 463                     for (f = EquivalentEncodings[clas][platform]; *f != STOP; f++)
 464                         if (!FindEncoding(arr, *f)) arr.push_back(*f);
 465                     i = NUM_OF_PLATFORMS/*hack*/; break;
 466                 }
 467         clas++;
 468     }
 469
 470     return arr;
 471 }
 472
 473
 474
 475 wxFontEncodingArray wxEncodingConverter::GetAllEquivalents(wxFontEncoding enc)
 476 {
 477     int i, clas, e, j ;
 478     wxFontEncoding *f;
 479     wxFontEncodingArray arr;
 480
 481     arr = GetPlatformEquivalents(enc); // we want them to be first items in array
 482
 483     clas = 0;
 484     while (EquivalentEncodings[clas][0][0] != STOP)
 485     {
 486         for (i = 0; i < NUM_OF_PLATFORMS; i++)
 487             for (e = 0; EquivalentEncodings[clas][i][e] != STOP; e++)
 488                 if (EquivalentEncodings[clas][i][e] == enc)
 489                 {
 490                     for (j = 0; j < NUM_OF_PLATFORMS; j++)
 491                         for (f = EquivalentEncodings[clas][j]; *f != STOP; f++)
 492                             if (!FindEncoding(arr, *f)) arr.push_back(*f);
 493                     i = NUM_OF_PLATFORMS/*hack*/; break;
 494                 }
 495         clas++;
 496     }
 497
 498     return arr;
 499 }
 500
 501 #endif // wxUSE_FONTMAP