src/html/htmlpars.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmlpars.cpp
   3 // Purpose:     wxHtmlParser class (generic parser)
   4 // Author:      Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1999 Vaclav Slavik
   7 // Licence:     wxWindows Licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #ifdef __GNUG__
  12 #pragma implementation
  13 #endif
  14
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/defs.h"
  18 #if wxUSE_HTML && wxUSE_STREAMS
  19
  20 #ifdef __BORDLANDC__
  21 #pragma hdrstop
  22 #endif
  23
  24 #ifndef WXPRECOMP
  25     #include "wx/log.h"
  26     #include "wx/intl.h"
  27 #endif
  28
  29 #include "wx/tokenzr.h"
  30 #include "wx/wfstream.h"
  31 #include "wx/url.h"
  32 #include "wx/fontmap.h"
  33 #include "wx/html/htmldefs.h"
  34 #include "wx/html/htmlpars.h"
  35 #include "wx/dynarray.h"
  36 #include "wx/arrimpl.cpp"
  37
  38 //-----------------------------------------------------------------------------
  39 // wxHtmlParser helpers
  40 //-----------------------------------------------------------------------------
  41
  42 class wxHtmlTextPiece
  43 {
  44 public:
  45     wxHtmlTextPiece(int pos, int lng) : m_pos(pos), m_lng(lng) {}
  46     int m_pos, m_lng;
  47 };
  48
  49 WX_DECLARE_OBJARRAY(wxHtmlTextPiece, wxHtmlTextPieces);
  50 WX_DEFINE_OBJARRAY(wxHtmlTextPieces);
  51
  52 class wxHtmlParserState
  53 {
  54 public:
  55     wxHtmlTag         *m_curTag;
  56     wxHtmlTag         *m_tags;
  57     wxHtmlTextPieces  *m_textPieces;
  58     int                m_curTextPiece;
  59     wxString           m_source;
  60     wxHtmlParserState *m_nextState;
  61 };
  62
  63 //-----------------------------------------------------------------------------
  64 // wxHtmlParser
  65 //-----------------------------------------------------------------------------
  66
  67 IMPLEMENT_ABSTRACT_CLASS(wxHtmlParser,wxObject)
  68
  69 wxHtmlParser::wxHtmlParser()
  70     : wxObject(), m_HandlersHash(wxKEY_STRING),
  71       m_FS(NULL), m_HandlersStack(NULL)
  72 {
  73     m_entitiesParser = new wxHtmlEntitiesParser;
  74     m_Tags = NULL;
  75     m_CurTag = NULL;
  76     m_TextPieces = NULL;
  77     m_CurTextPiece = 0;
  78     m_SavedStates = NULL;
  79 }
  80
  81 wxHtmlParser::~wxHtmlParser()
  82 {
  83     while (RestoreState()) {}
  84     DestroyDOMTree();
  85
  86     delete m_HandlersStack;
  87     m_HandlersHash.Clear();
  88     m_HandlersList.DeleteContents(TRUE);
  89     m_HandlersList.Clear();
  90     delete m_entitiesParser;
  91 }
  92
  93 wxObject* wxHtmlParser::Parse(const wxString& source)
  94 {
  95     wxObject *result;
  96
  97     InitParser(source);
  98     DoParsing();
  99     result = GetProduct();
 100     DoneParser();
 101     return result;
 102 }
 103
 104 void wxHtmlParser::InitParser(const wxString& source)
 105 {
 106     SetSource(source);
 107 }
 108
 109 void wxHtmlParser::DoneParser()
 110 {
 111     DestroyDOMTree();
 112 }
 113
 114 void wxHtmlParser::SetSource(const wxString& src)
 115 {
 116     DestroyDOMTree();
 117     m_Source = src;
 118     CreateDOMTree();
 119     m_CurTag = NULL;
 120     m_CurTextPiece = 0;
 121 }
 122
 123 void wxHtmlParser::CreateDOMTree()
 124 {
 125     wxHtmlTagsCache cache(m_Source);
 126     m_TextPieces = new wxHtmlTextPieces;
 127     CreateDOMSubTree(NULL, 0, m_Source.Length(), &cache);
 128     m_CurTextPiece = 0;
 129 }
 130
 131 void wxHtmlParser::CreateDOMSubTree(wxHtmlTag *cur,
 132                                     int begin_pos, int end_pos,
 133                                     wxHtmlTagsCache *cache)
 134 {
 135     if (end_pos <= begin_pos) return;
 136
 137     wxChar c;
 138     int i = begin_pos;
 139     int textBeginning = begin_pos;
 140
 141     while (i < end_pos)
 142     {
 143         c = m_Source.GetChar(i);
 144
 145         if (c == wxT('<'))
 146         {
 147             // add text to m_TextPieces:
 148             if (i - textBeginning > 0)
 149                 m_TextPieces->Add(
 150                     wxHtmlTextPiece(textBeginning, i - textBeginning));
 151
 152             // if it is a comment, skip it:
 153             if (i < end_pos-6 && m_Source.GetChar(i+1) == wxT('!') &&
 154                                  m_Source.GetChar(i+2) == wxT('-') &&
 155                                  m_Source.GetChar(i+3) == wxT('-'))
 156             {
 157                 // Comments begin with "<!--" and end with "--[ \t\r\n]*>"
 158                 // according to HTML 4.0
 159                 int dashes = 0;
 160                 i += 4;
 161                 while (i < end_pos)
 162                 {
 163                     c = m_Source.GetChar(i++);
 164                     if ((c == wxT(' ') || c == wxT('\n') ||
 165                         c == wxT('\r') || c == wxT('\t')) && dashes >= 2) {}
 166                     else if (c == wxT('>') && dashes >= 2)
 167                     {
 168                         textBeginning = i;
 169                         break;
 170                     }
 171                     else if (c == wxT('-'))
 172                         dashes++;
 173                     else
 174                         dashes = 0;
 175                 }
 176             }
 177
 178             // add another tag to the tree:
 179             else if (i < end_pos-1 && m_Source.GetChar(i+1) != wxT('/'))
 180                 {
 181                 wxHtmlTag *chd;
 182                 if (cur)
 183                     chd = new wxHtmlTag(cur, m_Source,
 184                                         i, end_pos, cache, m_entitiesParser);
 185                 else
 186                 {
 187                     chd = new wxHtmlTag(NULL, m_Source,
 188                                         i, end_pos, cache, m_entitiesParser);
 189                     if (!m_Tags)
 190                     {
 191                         // if this is the first tag to be created make the root
 192                         // m_Tags point to it:
 193                         m_Tags = chd;
 194                     }
 195                     else
 196                     {
 197                         // if there is already a root tag add this tag as
 198                         // the last sibling:
 199                         chd->m_Prev = m_Tags->GetLastSibling();
 200                         chd->m_Prev->m_Next = chd;
 201                     }
 202                 }
 203
 204                 if (chd->HasEnding())
 205                 {
 206                     CreateDOMSubTree(chd,
 207                                      chd->GetBeginPos(), chd->GetEndPos1(),
 208                                      cache);
 209                     i = chd->GetEndPos2();
 210                 }
 211                 else
 212                     i = chd->GetBeginPos();
 213                 textBeginning = i;
 214             }
 215
 216             // ... or skip ending tag:
 217             else
 218             {
 219                 while (i < end_pos && m_Source.GetChar(i) != wxT('>')) i++;
 220                 textBeginning = i+1;
 221             }
 222         }
 223         else i++;
 224     }
 225
 226     // add remaining text to m_TextPieces:
 227     if (end_pos - textBeginning > 0)
 228         m_TextPieces->Add(
 229             wxHtmlTextPiece(textBeginning, end_pos - textBeginning));
 230 }
 231
 232 void wxHtmlParser::DestroyDOMTree()
 233 {
 234     wxHtmlTag *t1, *t2;
 235     t1 = m_Tags;
 236     while (t1)
 237     {
 238         t2 = t1->GetNextSibling();
 239         delete t1;
 240         t1 = t2;
 241     }
 242     m_Tags = m_CurTag = NULL;
 243
 244     delete m_TextPieces;
 245     m_TextPieces = NULL;
 246 }
 247
 248 void wxHtmlParser::DoParsing()
 249 {
 250     m_CurTag = m_Tags;
 251     m_CurTextPiece = 0;
 252     DoParsing(0, m_Source.Length());
 253 }
 254
 255 void wxHtmlParser::DoParsing(int begin_pos, int end_pos)
 256 {
 257     if (end_pos <= begin_pos) return;
 258
 259     wxHtmlTextPieces& pieces = *m_TextPieces;
 260     size_t piecesCnt = pieces.GetCount();
 261
 262     while (begin_pos < end_pos)
 263     {
 264         while (m_CurTag && m_CurTag->GetBeginPos() < begin_pos)
 265             m_CurTag = m_CurTag->GetNextTag();
 266         while (m_CurTextPiece < piecesCnt &&
 267                pieces[m_CurTextPiece].m_pos < begin_pos)
 268             m_CurTextPiece++;
 269
 270         if (m_CurTextPiece < piecesCnt &&
 271             (!m_CurTag ||
 272              pieces[m_CurTextPiece].m_pos < m_CurTag->GetBeginPos()))
 273         {
 274             // Add text:
 275             AddText(GetEntitiesParser()->Parse(
 276                        m_Source.Mid(pieces[m_CurTextPiece].m_pos,
 277                                     pieces[m_CurTextPiece].m_lng)));
 278             begin_pos = pieces[m_CurTextPiece].m_pos +
 279                         pieces[m_CurTextPiece].m_lng;
 280             m_CurTextPiece++;
 281         }
 282         else if (m_CurTag)
 283         {
 284             // Add tag:
 285             if (m_CurTag)
 286             {
 287                 if (m_CurTag->HasEnding())
 288                     begin_pos = m_CurTag->GetEndPos2();
 289                 else
 290                     begin_pos = m_CurTag->GetBeginPos();
 291             }
 292             wxHtmlTag *t = m_CurTag;
 293             m_CurTag = m_CurTag->GetNextTag();
 294             AddTag(*t);
 295         }
 296         else break;
 297     }
 298 }
 299
 300 void wxHtmlParser::AddTag(const wxHtmlTag& tag)
 301 {
 302     wxHtmlTagHandler *h;
 303     bool inner = FALSE;
 304
 305     h = (wxHtmlTagHandler*) m_HandlersHash.Get(tag.GetName());
 306     if (h)
 307         inner = h->HandleTag(tag);
 308     if (!inner)
 309     {
 310         if (tag.HasEnding())
 311             DoParsing(tag.GetBeginPos(), tag.GetEndPos1());
 312     }
 313 }
 314
 315 void wxHtmlParser::AddTagHandler(wxHtmlTagHandler *handler)
 316 {
 317     wxString s(handler->GetSupportedTags());
 318     wxStringTokenizer tokenizer(s, wxT(", "));
 319
 320     while (tokenizer.HasMoreTokens())
 321         m_HandlersHash.Put(tokenizer.GetNextToken(), handler);
 322
 323     if (m_HandlersList.IndexOf(handler) == wxNOT_FOUND)
 324         m_HandlersList.Append(handler);
 325
 326     handler->SetParser(this);
 327 }
 328
 329 void wxHtmlParser::PushTagHandler(wxHtmlTagHandler *handler, wxString tags)
 330 {
 331     wxStringTokenizer tokenizer(tags, wxT(", "));
 332     wxString key;
 333
 334     if (m_HandlersStack == NULL)
 335     {
 336         m_HandlersStack = new wxList;
 337         m_HandlersStack->DeleteContents(TRUE);
 338     }
 339
 340     m_HandlersStack->Insert(new wxHashTable(m_HandlersHash));
 341
 342     while (tokenizer.HasMoreTokens())
 343     {
 344         key = tokenizer.GetNextToken();
 345         m_HandlersHash.Delete(key);
 346         m_HandlersHash.Put(key, handler);
 347     }
 348 }
 349
 350 void wxHtmlParser::PopTagHandler()
 351 {
 352     wxNode *first;
 353
 354     if (m_HandlersStack == NULL ||
 355         (first = m_HandlersStack->GetFirst()) == NULL)
 356     {
 357         wxLogWarning(_("Warning: attempt to remove HTML tag handler from empty stack."));
 358         return;
 359     }
 360     m_HandlersHash = *((wxHashTable*) first->GetData());
 361     m_HandlersStack->DeleteNode(first);
 362 }
 363
 364 void wxHtmlParser::SetSourceAndSaveState(const wxString& src)
 365 {
 366     wxHtmlParserState *s = new wxHtmlParserState;
 367
 368     s->m_curTag = m_CurTag;
 369     s->m_tags = m_Tags;
 370     s->m_textPieces = m_TextPieces;
 371     s->m_curTextPiece = m_CurTextPiece;
 372     s->m_source = m_Source;
 373
 374     s->m_nextState = m_SavedStates;
 375     m_SavedStates = s;
 376
 377     m_CurTag = NULL;
 378     m_Tags = NULL;
 379     m_TextPieces = NULL;
 380     m_CurTextPiece = 0;
 381     m_Source = wxEmptyString;
 382
 383     SetSource(src);
 384 }
 385
 386 bool wxHtmlParser::RestoreState()
 387 {
 388     if (!m_SavedStates) return FALSE;
 389
 390     DestroyDOMTree();
 391
 392     wxHtmlParserState *s = m_SavedStates;
 393     m_SavedStates = s->m_nextState;
 394
 395     m_CurTag = s->m_curTag;
 396     m_Tags = s->m_tags;
 397     m_TextPieces = s->m_textPieces;
 398     m_CurTextPiece = s->m_curTextPiece;
 399     m_Source = s->m_source;
 400
 401     delete s;
 402     return TRUE;
 403 }
 404
 405 //-----------------------------------------------------------------------------
 406 // wxHtmlTagHandler
 407 //-----------------------------------------------------------------------------
 408
 409 IMPLEMENT_ABSTRACT_CLASS(wxHtmlTagHandler,wxObject)
 410
 411
 412 //-----------------------------------------------------------------------------
 413 // wxHtmlEntitiesParser
 414 //-----------------------------------------------------------------------------
 415
 416 IMPLEMENT_DYNAMIC_CLASS(wxHtmlEntitiesParser,wxObject)
 417
 418 wxHtmlEntitiesParser::wxHtmlEntitiesParser()
 419 #if wxUSE_WCHAR_T && !wxUSE_UNICODE
 420     : m_conv(NULL), m_encoding(wxFONTENCODING_SYSTEM)
 421 #endif
 422 {
 423 }
 424
 425 wxHtmlEntitiesParser::~wxHtmlEntitiesParser()
 426 {
 427 #if wxUSE_WCHAR_T && !wxUSE_UNICODE
 428     delete m_conv;
 429 #endif
 430 }
 431
 432 void wxHtmlEntitiesParser::SetEncoding(wxFontEncoding encoding)
 433 {
 434 #if wxUSE_WCHAR_T && !wxUSE_UNICODE
 435     if (encoding == m_encoding) return;
 436     delete m_conv;
 437     m_conv = NULL;
 438     m_encoding = encoding;
 439     if (m_encoding != wxFONTENCODING_SYSTEM)
 440         m_conv = new wxCSConv(wxFontMapper::GetEncodingName(m_encoding));
 441 #else
 442     (void) encoding;
 443 #endif
 444 }
 445
 446 wxString wxHtmlEntitiesParser::Parse(const wxString& input)
 447 {
 448     const wxChar *c, *last;
 449     const wxChar *in_str = input.c_str();
 450     wxString output;
 451
 452     output.reserve(input.length());
 453
 454     for (c = in_str, last = in_str; *c != wxT('\0'); c++)
 455     {
 456         if (*c == wxT('&'))
 457         {
 458             if (c - last > 0)
 459                 output.append(last, c - last);
 460             if (++c == wxT('\0')) break;
 461
 462             wxString entity;
 463             const wxChar *ent_s = c;
 464             wxChar entity_char;
 465
 466             for (; (*c >= wxT('a') && *c <= wxT('z')) ||
 467                    (*c >= wxT('A') && *c <= wxT('Z')) ||
 468                    (*c >= wxT('0') && *c <= wxT('9')) ||
 469                    *c == wxT('_') || *c == wxT('#'); c++) {}
 470             entity.append(ent_s, c - ent_s);
 471             if (*c != wxT(';')) c--;
 472             last = c+1;
 473             entity_char = GetEntityChar(entity);
 474             if (entity_char)
 475                 output << entity_char;
 476             else
 477             {
 478                 output.append(ent_s-1, c-ent_s+2);
 479                 wxLogDebug(wxT("Unrecognized HTML entity: '%s'"), entity.c_str());
 480             }
 481         }
 482     }
 483     if (*last != wxT('\0'))
 484         output.append(last);
 485     return output;
 486 }
 487
 488 struct wxHtmlEntityInfo
 489 {
 490     const wxChar *name;
 491     unsigned code;
 492 };
 493
 494 extern "C" int LINKAGEMODE wxHtmlEntityCompare(const void *key, const void *item)
 495 {
 496     return wxStrcmp((wxChar*)key, ((wxHtmlEntityInfo*)item)->name);
 497 }
 498
 499 wxChar wxHtmlEntitiesParser::GetCharForCode(unsigned code)
 500 {
 501 #if wxUSE_UNICODE
 502     return (wxChar)code;
 503 #elif wxUSE_WCHAR_T
 504     char buf[2];
 505     wchar_t wbuf[2];
 506     wbuf[0] = (wchar_t)code;
 507     wbuf[1] = 0;
 508     wxMBConv *conv = m_conv ? m_conv : &wxConvLocal;
 509     if (conv->WC2MB(buf, wbuf, 2) == (size_t)-1)
 510         return '?';
 511     return buf[0];
 512 #else
 513     return (code < 256) ? (wxChar)code : '?';
 514 #endif
 515 }
 516
 517 wxChar wxHtmlEntitiesParser::GetEntityChar(const wxString& entity)
 518 {
 519     unsigned code = 0;
 520
 521     if (entity[0] == wxT('#'))
 522     {
 523         const wxChar *ent_s = entity.c_str();
 524         const wxChar *format;
 525
 526         if (ent_s[1] == wxT('x') || ent_s[1] == wxT('X'))
 527         {
 528             format = wxT("%x");
 529             ent_s++;
 530         }
 531         else
 532             format = wxT("%u");
 533         ent_s++;
 534
 535         if (wxSscanf(ent_s, format, &code) != 1)
 536             code = 0;
 537     }
 538     else
 539     {
 540         static wxHtmlEntityInfo substitutions[] = {
 541             { wxT("AElig"),198 },
 542             { wxT("Aacute"),193 },
 543             { wxT("Acirc"),194 },
 544             { wxT("Agrave"),192 },
 545             { wxT("Alpha"),913 },
 546             { wxT("Aring"),197 },
 547             { wxT("Atilde"),195 },
 548             { wxT("Auml"),196 },
 549             { wxT("Beta"),914 },
 550             { wxT("Ccedil"),199 },
 551             { wxT("Chi"),935 },
 552             { wxT("Dagger"),8225 },
 553             { wxT("Delta"),916 },
 554             { wxT("ETH"),208 },
 555             { wxT("Eacute"),201 },
 556             { wxT("Ecirc"),202 },
 557             { wxT("Egrave"),200 },
 558             { wxT("Epsilon"),917 },
 559             { wxT("Eta"),919 },
 560             { wxT("Euml"),203 },
 561             { wxT("Gamma"),915 },
 562             { wxT("Iacute"),205 },
 563             { wxT("Icirc"),206 },
 564             { wxT("Igrave"),204 },
 565             { wxT("Iota"),921 },
 566             { wxT("Iuml"),207 },
 567             { wxT("Kappa"),922 },
 568             { wxT("Lambda"),923 },
 569             { wxT("Mu"),924 },
 570             { wxT("Ntilde"),209 },
 571             { wxT("Nu"),925 },
 572             { wxT("OElig"),338 },
 573             { wxT("Oacute"),211 },
 574             { wxT("Ocirc"),212 },
 575             { wxT("Ograve"),210 },
 576             { wxT("Omega"),937 },
 577             { wxT("Omicron"),927 },
 578             { wxT("Oslash"),216 },
 579             { wxT("Otilde"),213 },
 580             { wxT("Ouml"),214 },
 581             { wxT("Phi"),934 },
 582             { wxT("Pi"),928 },
 583             { wxT("Prime"),8243 },
 584             { wxT("Psi"),936 },
 585             { wxT("Rho"),929 },
 586             { wxT("Scaron"),352 },
 587             { wxT("Sigma"),931 },
 588             { wxT("THORN"),222 },
 589             { wxT("Tau"),932 },
 590             { wxT("Theta"),920 },
 591             { wxT("Uacute"),218 },
 592             { wxT("Ucirc"),219 },
 593             { wxT("Ugrave"),217 },
 594             { wxT("Upsilon"),933 },
 595             { wxT("Uuml"),220 },
 596             { wxT("Xi"),926 },
 597             { wxT("Yacute"),221 },
 598             { wxT("Yuml"),376 },
 599             { wxT("Zeta"),918 },
 600             { wxT("aacute"),225 },
 601             { wxT("acirc"),226 },
 602             { wxT("acute"),180 },
 603             { wxT("aelig"),230 },
 604             { wxT("agrave"),224 },
 605             { wxT("alefsym"),8501 },
 606             { wxT("alpha"),945 },
 607             { wxT("amp"),38 },
 608             { wxT("and"),8743 },
 609             { wxT("ang"),8736 },
 610             { wxT("aring"),229 },
 611             { wxT("asymp"),8776 },
 612             { wxT("atilde"),227 },
 613             { wxT("auml"),228 },
 614             { wxT("bdquo"),8222 },
 615             { wxT("beta"),946 },
 616             { wxT("brvbar"),166 },
 617             { wxT("bull"),8226 },
 618             { wxT("cap"),8745 },
 619             { wxT("ccedil"),231 },
 620             { wxT("cedil"),184 },
 621             { wxT("cent"),162 },
 622             { wxT("chi"),967 },
 623             { wxT("circ"),710 },
 624             { wxT("clubs"),9827 },
 625             { wxT("cong"),8773 },
 626             { wxT("copy"),169 },
 627             { wxT("crarr"),8629 },
 628             { wxT("cup"),8746 },
 629             { wxT("curren"),164 },
 630             { wxT("dArr"),8659 },
 631             { wxT("dagger"),8224 },
 632             { wxT("darr"),8595 },
 633             { wxT("deg"),176 },
 634             { wxT("delta"),948 },
 635             { wxT("diams"),9830 },
 636             { wxT("divide"),247 },
 637             { wxT("eacute"),233 },
 638             { wxT("ecirc"),234 },
 639             { wxT("egrave"),232 },
 640             { wxT("empty"),8709 },
 641             { wxT("emsp"),8195 },
 642             { wxT("ensp"),8194 },
 643             { wxT("epsilon"),949 },
 644             { wxT("equiv"),8801 },
 645             { wxT("eta"),951 },
 646             { wxT("eth"),240 },
 647             { wxT("euml"),235 },
 648             { wxT("euro"),8364 },
 649             { wxT("exist"),8707 },
 650             { wxT("fnof"),402 },
 651             { wxT("forall"),8704 },
 652             { wxT("frac12"),189 },
 653             { wxT("frac14"),188 },
 654             { wxT("frac34"),190 },
 655             { wxT("frasl"),8260 },
 656             { wxT("gamma"),947 },
 657             { wxT("ge"),8805 },
 658             { wxT("gt"),62 },
 659             { wxT("hArr"),8660 },
 660             { wxT("harr"),8596 },
 661             { wxT("hearts"),9829 },
 662             { wxT("hellip"),8230 },
 663             { wxT("iacute"),237 },
 664             { wxT("icirc"),238 },
 665             { wxT("iexcl"),161 },
 666             { wxT("igrave"),236 },
 667             { wxT("image"),8465 },
 668             { wxT("infin"),8734 },
 669             { wxT("int"),8747 },
 670             { wxT("iota"),953 },
 671             { wxT("iquest"),191 },
 672             { wxT("isin"),8712 },
 673             { wxT("iuml"),239 },
 674             { wxT("kappa"),954 },
 675             { wxT("lArr"),8656 },
 676             { wxT("lambda"),955 },
 677             { wxT("lang"),9001 },
 678             { wxT("laquo"),171 },
 679             { wxT("larr"),8592 },
 680             { wxT("lceil"),8968 },
 681             { wxT("ldquo"),8220 },
 682             { wxT("le"),8804 },
 683             { wxT("lfloor"),8970 },
 684             { wxT("lowast"),8727 },
 685             { wxT("loz"),9674 },
 686             { wxT("lrm"),8206 },
 687             { wxT("lsaquo"),8249 },
 688             { wxT("lsquo"),8216 },
 689             { wxT("lt"),60 },
 690             { wxT("macr"),175 },
 691             { wxT("mdash"),8212 },
 692             { wxT("micro"),181 },
 693             { wxT("middot"),183 },
 694             { wxT("minus"),8722 },
 695             { wxT("mu"),956 },
 696             { wxT("nabla"),8711 },
 697             { wxT("nbsp"),160 },
 698             { wxT("ndash"),8211 },
 699             { wxT("ne"),8800 },
 700             { wxT("ni"),8715 },
 701             { wxT("not"),172 },
 702             { wxT("notin"),8713 },
 703             { wxT("nsub"),8836 },
 704             { wxT("ntilde"),241 },
 705             { wxT("nu"),957 },
 706             { wxT("oacute"),243 },
 707             { wxT("ocirc"),244 },
 708             { wxT("oelig"),339 },
 709             { wxT("ograve"),242 },
 710             { wxT("oline"),8254 },
 711             { wxT("omega"),969 },
 712             { wxT("omicron"),959 },
 713             { wxT("oplus"),8853 },
 714             { wxT("or"),8744 },
 715             { wxT("ordf"),170 },
 716             { wxT("ordm"),186 },
 717             { wxT("oslash"),248 },
 718             { wxT("otilde"),245 },
 719             { wxT("otimes"),8855 },
 720             { wxT("ouml"),246 },
 721             { wxT("para"),182 },
 722             { wxT("part"),8706 },
 723             { wxT("permil"),8240 },
 724             { wxT("perp"),8869 },
 725             { wxT("phi"),966 },
 726             { wxT("pi"),960 },
 727             { wxT("piv"),982 },
 728             { wxT("plusmn"),177 },
 729             { wxT("pound"),163 },
 730             { wxT("prime"),8242 },
 731             { wxT("prod"),8719 },
 732             { wxT("prop"),8733 },
 733             { wxT("psi"),968 },
 734             { wxT("quot"),34 },
 735             { wxT("rArr"),8658 },
 736             { wxT("radic"),8730 },
 737             { wxT("rang"),9002 },
 738             { wxT("raquo"),187 },
 739             { wxT("rarr"),8594 },
 740             { wxT("rceil"),8969 },
 741             { wxT("rdquo"),8221 },
 742             { wxT("real"),8476 },
 743             { wxT("reg"),174 },
 744             { wxT("rfloor"),8971 },
 745             { wxT("rho"),961 },
 746             { wxT("rlm"),8207 },
 747             { wxT("rsaquo"),8250 },
 748             { wxT("rsquo"),8217 },
 749             { wxT("sbquo"),8218 },
 750             { wxT("scaron"),353 },
 751             { wxT("sdot"),8901 },
 752             { wxT("sect"),167 },
 753             { wxT("shy"),173 },
 754             { wxT("sigma"),963 },
 755             { wxT("sigmaf"),962 },
 756             { wxT("sim"),8764 },
 757             { wxT("spades"),9824 },
 758             { wxT("sub"),8834 },
 759             { wxT("sube"),8838 },
 760             { wxT("sum"),8721 },
 761             { wxT("sup"),8835 },
 762             { wxT("sup1"),185 },
 763             { wxT("sup2"),178 },
 764             { wxT("sup3"),179 },
 765             { wxT("supe"),8839 },
 766             { wxT("szlig"),223 },
 767             { wxT("tau"),964 },
 768             { wxT("there4"),8756 },
 769             { wxT("theta"),952 },
 770             { wxT("thetasym"),977 },
 771             { wxT("thinsp"),8201 },
 772             { wxT("thorn"),254 },
 773             { wxT("tilde"),732 },
 774             { wxT("times"),215 },
 775             { wxT("trade"),8482 },
 776             { wxT("uArr"),8657 },
 777             { wxT("uacute"),250 },
 778             { wxT("uarr"),8593 },
 779             { wxT("ucirc"),251 },
 780             { wxT("ugrave"),249 },
 781             { wxT("uml"),168 },
 782             { wxT("upsih"),978 },
 783             { wxT("upsilon"),965 },
 784             { wxT("uuml"),252 },
 785             { wxT("weierp"),8472 },
 786             { wxT("xi"),958 },
 787             { wxT("yacute"),253 },
 788             { wxT("yen"),165 },
 789             { wxT("yuml"),255 },
 790             { wxT("zeta"),950 },
 791             { wxT("zwj"),8205 },
 792             { wxT("zwnj"),8204 },
 793             {NULL, 0}};
 794         static size_t substitutions_cnt = 0;
 795
 796         if (substitutions_cnt == 0)
 797             while (substitutions[substitutions_cnt].code != 0)
 798                 substitutions_cnt++;
 799
 800         wxHtmlEntityInfo *info;
 801         info = (wxHtmlEntityInfo*) bsearch(entity.c_str(), substitutions,
 802                                            substitutions_cnt,
 803                                            sizeof(wxHtmlEntityInfo),
 804                                            wxHtmlEntityCompare);
 805         if (info)
 806             code = info->code;
 807     }
 808
 809     if (code == 0)
 810         return 0;
 811     else
 812         return GetCharForCode(code);
 813 }
 814
 815 #endif