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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 "htmlpars.h"
13#endif
14
15#include "wx/wxprec.h"
16
17#include "wx/defs.h"
18#if wxUSE_HTML && wxUSE_STREAMS
19
20#ifdef __BORLANDC__
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
42class wxHtmlTextPiece
43{
44public:
45 wxHtmlTextPiece(int pos, int lng) : m_pos(pos), m_lng(lng) {}
46 int m_pos, m_lng;
47};
48
49WX_DECLARE_OBJARRAY(wxHtmlTextPiece, wxHtmlTextPieces);
50WX_DEFINE_OBJARRAY(wxHtmlTextPieces);
51
52class wxHtmlParserState
53{
54public:
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
67IMPLEMENT_ABSTRACT_CLASS(wxHtmlParser,wxObject)
68
69wxHtmlParser::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
81wxHtmlParser::~wxHtmlParser()
82{
83 while (RestoreState()) {}
84 DestroyDOMTree();
85
86 if (m_HandlersStack)
87 {
88 wxList& tmp = *m_HandlersStack;
89 wxList::iterator it, en;
90 for( it = tmp.begin(), en = tmp.end(); it != en; ++it )
91 delete (wxHashTable*)*it;
92 tmp.clear();
93 }
94 delete m_HandlersStack;
95 m_HandlersHash.Clear();
96 WX_CLEAR_LIST(wxList, m_HandlersList);
97 delete m_entitiesParser;
98}
99
100wxObject* wxHtmlParser::Parse(const wxString& source)
101{
102 InitParser(source);
103 DoParsing();
104 wxObject *result = GetProduct();
105 DoneParser();
106 return result;
107}
108
109void wxHtmlParser::InitParser(const wxString& source)
110{
111 SetSource(source);
112 m_stopParsing = FALSE;
113}
114
115void wxHtmlParser::DoneParser()
116{
117 DestroyDOMTree();
118}
119
120void wxHtmlParser::SetSource(const wxString& src)
121{
122 DestroyDOMTree();
123 m_Source = src;
124 CreateDOMTree();
125 m_CurTag = NULL;
126 m_CurTextPiece = 0;
127}
128
129void wxHtmlParser::CreateDOMTree()
130{
131 wxHtmlTagsCache cache(m_Source);
132 m_TextPieces = new wxHtmlTextPieces;
133 CreateDOMSubTree(NULL, 0, m_Source.Length(), &cache);
134 m_CurTextPiece = 0;
135}
136
137extern bool wxIsCDATAElement(const wxChar *tag);
138
139void wxHtmlParser::CreateDOMSubTree(wxHtmlTag *cur,
140 int begin_pos, int end_pos,
141 wxHtmlTagsCache *cache)
142{
143 if (end_pos <= begin_pos) return;
144
145 wxChar c;
146 int i = begin_pos;
147 int textBeginning = begin_pos;
148
149 // If the tag contains CDATA text, we include the text between beginning
150 // and ending tag verbosely. Setting i=end_pos will skip to the very
151 // end of this function where text piece is added, bypassing any child
152 // tags parsing (CDATA element can't have child elements by definition):
153 if (cur != NULL && wxIsCDATAElement(cur->GetName().c_str()))
154 {
155 i = end_pos;
156 }
157
158 while (i < end_pos)
159 {
160 c = m_Source.GetChar(i);
161
162 if (c == wxT('<'))
163 {
164 // add text to m_TextPieces:
165 if (i - textBeginning > 0)
166 m_TextPieces->Add(
167 wxHtmlTextPiece(textBeginning, i - textBeginning));
168
169 // if it is a comment, skip it:
170 if (i < end_pos-6 && m_Source.GetChar(i+1) == wxT('!') &&
171 m_Source.GetChar(i+2) == wxT('-') &&
172 m_Source.GetChar(i+3) == wxT('-'))
173 {
174 // Comments begin with "<!--" and end with "--[ \t\r\n]*>"
175 // according to HTML 4.0
176 int dashes = 0;
177 i += 4;
178 while (i < end_pos)
179 {
180 c = m_Source.GetChar(i++);
181 if ((c == wxT(' ') || c == wxT('\n') ||
182 c == wxT('\r') || c == wxT('\t')) && dashes >= 2) {}
183 else if (c == wxT('>') && dashes >= 2)
184 {
185 textBeginning = i;
186 break;
187 }
188 else if (c == wxT('-'))
189 dashes++;
190 else
191 dashes = 0;
192 }
193 }
194
195 // add another tag to the tree:
196 else if (i < end_pos-1 && m_Source.GetChar(i+1) != wxT('/'))
197 {
198 wxHtmlTag *chd;
199 if (cur)
200 chd = new wxHtmlTag(cur, m_Source,
201 i, end_pos, cache, m_entitiesParser);
202 else
203 {
204 chd = new wxHtmlTag(NULL, m_Source,
205 i, end_pos, cache, m_entitiesParser);
206 if (!m_Tags)
207 {
208 // if this is the first tag to be created make the root
209 // m_Tags point to it:
210 m_Tags = chd;
211 }
212 else
213 {
214 // if there is already a root tag add this tag as
215 // the last sibling:
216 chd->m_Prev = m_Tags->GetLastSibling();
217 chd->m_Prev->m_Next = chd;
218 }
219 }
220
221 if (chd->HasEnding())
222 {
223 CreateDOMSubTree(chd,
224 chd->GetBeginPos(), chd->GetEndPos1(),
225 cache);
226 i = chd->GetEndPos2();
227 }
228 else
229 i = chd->GetBeginPos();
230
231 textBeginning = i;
232 }
233
234 // ... or skip ending tag:
235 else
236 {
237 while (i < end_pos && m_Source.GetChar(i) != wxT('>')) i++;
238 textBeginning = i+1;
239 }
240 }
241 else i++;
242 }
243
244 // add remaining text to m_TextPieces:
245 if (end_pos - textBeginning > 0)
246 m_TextPieces->Add(
247 wxHtmlTextPiece(textBeginning, end_pos - textBeginning));
248}
249
250void wxHtmlParser::DestroyDOMTree()
251{
252 wxHtmlTag *t1, *t2;
253 t1 = m_Tags;
254 while (t1)
255 {
256 t2 = t1->GetNextSibling();
257 delete t1;
258 t1 = t2;
259 }
260 m_Tags = m_CurTag = NULL;
261
262 delete m_TextPieces;
263 m_TextPieces = NULL;
264}
265
266void wxHtmlParser::DoParsing()
267{
268 m_CurTag = m_Tags;
269 m_CurTextPiece = 0;
270 DoParsing(0, m_Source.Length());
271}
272
273void wxHtmlParser::DoParsing(int begin_pos, int end_pos)
274{
275 if (end_pos <= begin_pos) return;
276
277 wxHtmlTextPieces& pieces = *m_TextPieces;
278 size_t piecesCnt = pieces.GetCount();
279
280 while (begin_pos < end_pos)
281 {
282 while (m_CurTag && m_CurTag->GetBeginPos() < begin_pos)
283 m_CurTag = m_CurTag->GetNextTag();
284 while (m_CurTextPiece < piecesCnt &&
285 pieces[m_CurTextPiece].m_pos < begin_pos)
286 m_CurTextPiece++;
287
288 if (m_CurTextPiece < piecesCnt &&
289 (!m_CurTag ||
290 pieces[m_CurTextPiece].m_pos < m_CurTag->GetBeginPos()))
291 {
292 // Add text:
293 AddText(GetEntitiesParser()->Parse(
294 m_Source.Mid(pieces[m_CurTextPiece].m_pos,
295 pieces[m_CurTextPiece].m_lng)));
296 begin_pos = pieces[m_CurTextPiece].m_pos +
297 pieces[m_CurTextPiece].m_lng;
298 m_CurTextPiece++;
299 }
300 else if (m_CurTag)
301 {
302 // Add tag:
303 if (m_CurTag)
304 {
305 if (m_CurTag->HasEnding())
306 begin_pos = m_CurTag->GetEndPos2();
307 else
308 begin_pos = m_CurTag->GetBeginPos();
309 }
310 wxHtmlTag *t = m_CurTag;
311 m_CurTag = m_CurTag->GetNextTag();
312 AddTag(*t);
313 if (m_stopParsing)
314 return;
315 }
316 else break;
317 }
318}
319
320void wxHtmlParser::AddTag(const wxHtmlTag& tag)
321{
322 wxHtmlTagHandler *h;
323 bool inner = FALSE;
324
325 h = (wxHtmlTagHandler*) m_HandlersHash.Get(tag.GetName());
326 if (h)
327 {
328 inner = h->HandleTag(tag);
329 if (m_stopParsing)
330 return;
331 }
332 if (!inner)
333 {
334 if (tag.HasEnding())
335 DoParsing(tag.GetBeginPos(), tag.GetEndPos1());
336 }
337}
338
339void wxHtmlParser::AddTagHandler(wxHtmlTagHandler *handler)
340{
341 wxString s(handler->GetSupportedTags());
342 wxStringTokenizer tokenizer(s, wxT(", "));
343
344 while (tokenizer.HasMoreTokens())
345 m_HandlersHash.Put(tokenizer.GetNextToken(), handler);
346
347 if (m_HandlersList.IndexOf(handler) == wxNOT_FOUND)
348 m_HandlersList.Append(handler);
349
350 handler->SetParser(this);
351}
352
353void wxHtmlParser::PushTagHandler(wxHtmlTagHandler *handler, wxString tags)
354{
355 wxStringTokenizer tokenizer(tags, wxT(", "));
356 wxString key;
357
358 if (m_HandlersStack == NULL)
359 {
360 m_HandlersStack = new wxList;
361 }
362
363 m_HandlersStack->Insert((wxObject*)new wxHashTable(m_HandlersHash));
364
365 while (tokenizer.HasMoreTokens())
366 {
367 key = tokenizer.GetNextToken();
368 m_HandlersHash.Delete(key);
369 m_HandlersHash.Put(key, handler);
370 }
371}
372
373void wxHtmlParser::PopTagHandler()
374{
375 wxList::compatibility_iterator first;
376
377 if ( !m_HandlersStack ||
378#if wxUSE_STL
379 !(first = m_HandlersStack->GetFirst())
380#else // !wxUSE_STL
381 ((first = m_HandlersStack->GetFirst()) == NULL)
382#endif // wxUSE_STL/!wxUSE_STL
383 )
384 {
385 wxLogWarning(_("Warning: attempt to remove HTML tag handler from empty stack."));
386 return;
387 }
388 m_HandlersHash = *((wxHashTable*) first->GetData());
389 delete (wxHashTable*) first->GetData();
390 m_HandlersStack->Erase(first);
391}
392
393void wxHtmlParser::SetSourceAndSaveState(const wxString& src)
394{
395 wxHtmlParserState *s = new wxHtmlParserState;
396
397 s->m_curTag = m_CurTag;
398 s->m_tags = m_Tags;
399 s->m_textPieces = m_TextPieces;
400 s->m_curTextPiece = m_CurTextPiece;
401 s->m_source = m_Source;
402
403 s->m_nextState = m_SavedStates;
404 m_SavedStates = s;
405
406 m_CurTag = NULL;
407 m_Tags = NULL;
408 m_TextPieces = NULL;
409 m_CurTextPiece = 0;
410 m_Source = wxEmptyString;
411
412 SetSource(src);
413}
414
415bool wxHtmlParser::RestoreState()
416{
417 if (!m_SavedStates) return FALSE;
418
419 DestroyDOMTree();
420
421 wxHtmlParserState *s = m_SavedStates;
422 m_SavedStates = s->m_nextState;
423
424 m_CurTag = s->m_curTag;
425 m_Tags = s->m_tags;
426 m_TextPieces = s->m_textPieces;
427 m_CurTextPiece = s->m_curTextPiece;
428 m_Source = s->m_source;
429
430 delete s;
431 return TRUE;
432}
433
434//-----------------------------------------------------------------------------
435// wxHtmlTagHandler
436//-----------------------------------------------------------------------------
437
438IMPLEMENT_ABSTRACT_CLASS(wxHtmlTagHandler,wxObject)
439
440
441//-----------------------------------------------------------------------------
442// wxHtmlEntitiesParser
443//-----------------------------------------------------------------------------
444
445IMPLEMENT_DYNAMIC_CLASS(wxHtmlEntitiesParser,wxObject)
446
447wxHtmlEntitiesParser::wxHtmlEntitiesParser()
448#if wxUSE_WCHAR_T && !wxUSE_UNICODE
449 : m_conv(NULL), m_encoding(wxFONTENCODING_SYSTEM)
450#endif
451{
452}
453
454wxHtmlEntitiesParser::~wxHtmlEntitiesParser()
455{
456#if wxUSE_WCHAR_T && !wxUSE_UNICODE
457 delete m_conv;
458#endif
459}
460
461void wxHtmlEntitiesParser::SetEncoding(wxFontEncoding encoding)
462{
463#if wxUSE_WCHAR_T && !wxUSE_UNICODE
464 if (encoding == m_encoding)
465 return;
466
467 delete m_conv;
468
469 m_encoding = encoding;
470 if (m_encoding == wxFONTENCODING_SYSTEM)
471 m_conv = NULL;
472 else
473 m_conv = new wxCSConv(wxFontMapper::GetEncodingName(m_encoding));
474#else
475 (void) encoding;
476#endif
477}
478
479wxString wxHtmlEntitiesParser::Parse(const wxString& input)
480{
481 const wxChar *c, *last;
482 const wxChar *in_str = input.c_str();
483 wxString output;
484
485 output.reserve(input.length());
486
487 for (c = in_str, last = in_str; *c != wxT('\0'); c++)
488 {
489 if (*c == wxT('&'))
490 {
491 if (c - last > 0)
492 output.append(last, c - last);
493 if (++c == wxT('\0')) break;
494
495 wxString entity;
496 const wxChar *ent_s = c;
497 wxChar entity_char;
498
499 for (; (*c >= wxT('a') && *c <= wxT('z')) ||
500 (*c >= wxT('A') && *c <= wxT('Z')) ||
501 (*c >= wxT('0') && *c <= wxT('9')) ||
502 *c == wxT('_') || *c == wxT('#'); c++) {}
503 entity.append(ent_s, c - ent_s);
504 if (*c != wxT(';')) c--;
505 last = c+1;
506 entity_char = GetEntityChar(entity);
507 if (entity_char)
508 output << entity_char;
509 else
510 {
511 output.append(ent_s-1, c-ent_s+2);
512 wxLogDebug(wxT("Unrecognized HTML entity: '%s'"), entity.c_str());
513 }
514 }
515 }
516 if (*last != wxT('\0'))
517 output.append(last);
518 return output;
519}
520
521struct wxHtmlEntityInfo
522{
523 const wxChar *name;
524 unsigned code;
525};
526
527extern "C" int LINKAGEMODE wxHtmlEntityCompare(const void *key, const void *item)
528{
529 return wxStrcmp((wxChar*)key, ((wxHtmlEntityInfo*)item)->name);
530}
531
532#if !wxUSE_UNICODE
533wxChar wxHtmlEntitiesParser::GetCharForCode(unsigned code)
534{
535#if wxUSE_WCHAR_T
536 char buf[2];
537 wchar_t wbuf[2];
538 wbuf[0] = (wchar_t)code;
539 wbuf[1] = 0;
540 wxMBConv *conv = m_conv ? m_conv : &wxConvLocal;
541 if (conv->WC2MB(buf, wbuf, 2) == (size_t)-1)
542 return '?';
543 return buf[0];
544#else
545 return (code < 256) ? (wxChar)code : '?';
546#endif
547}
548#endif
549
550wxChar wxHtmlEntitiesParser::GetEntityChar(const wxString& entity)
551{
552 unsigned code = 0;
553
554 if (entity[0] == wxT('#'))
555 {
556 const wxChar *ent_s = entity.c_str();
557 const wxChar *format;
558
559 if (ent_s[1] == wxT('x') || ent_s[1] == wxT('X'))
560 {
561 format = wxT("%x");
562 ent_s++;
563 }
564 else
565 format = wxT("%u");
566 ent_s++;
567
568 if (wxSscanf(ent_s, format, &code) != 1)
569 code = 0;
570 }
571 else
572 {
573 static wxHtmlEntityInfo substitutions[] = {
574 { wxT("AElig"),198 },
575 { wxT("Aacute"),193 },
576 { wxT("Acirc"),194 },
577 { wxT("Agrave"),192 },
578 { wxT("Alpha"),913 },
579 { wxT("Aring"),197 },
580 { wxT("Atilde"),195 },
581 { wxT("Auml"),196 },
582 { wxT("Beta"),914 },
583 { wxT("Ccedil"),199 },
584 { wxT("Chi"),935 },
585 { wxT("Dagger"),8225 },
586 { wxT("Delta"),916 },
587 { wxT("ETH"),208 },
588 { wxT("Eacute"),201 },
589 { wxT("Ecirc"),202 },
590 { wxT("Egrave"),200 },
591 { wxT("Epsilon"),917 },
592 { wxT("Eta"),919 },
593 { wxT("Euml"),203 },
594 { wxT("Gamma"),915 },
595 { wxT("Iacute"),205 },
596 { wxT("Icirc"),206 },
597 { wxT("Igrave"),204 },
598 { wxT("Iota"),921 },
599 { wxT("Iuml"),207 },
600 { wxT("Kappa"),922 },
601 { wxT("Lambda"),923 },
602 { wxT("Mu"),924 },
603 { wxT("Ntilde"),209 },
604 { wxT("Nu"),925 },
605 { wxT("OElig"),338 },
606 { wxT("Oacute"),211 },
607 { wxT("Ocirc"),212 },
608 { wxT("Ograve"),210 },
609 { wxT("Omega"),937 },
610 { wxT("Omicron"),927 },
611 { wxT("Oslash"),216 },
612 { wxT("Otilde"),213 },
613 { wxT("Ouml"),214 },
614 { wxT("Phi"),934 },
615 { wxT("Pi"),928 },
616 { wxT("Prime"),8243 },
617 { wxT("Psi"),936 },
618 { wxT("Rho"),929 },
619 { wxT("Scaron"),352 },
620 { wxT("Sigma"),931 },
621 { wxT("THORN"),222 },
622 { wxT("Tau"),932 },
623 { wxT("Theta"),920 },
624 { wxT("Uacute"),218 },
625 { wxT("Ucirc"),219 },
626 { wxT("Ugrave"),217 },
627 { wxT("Upsilon"),933 },
628 { wxT("Uuml"),220 },
629 { wxT("Xi"),926 },
630 { wxT("Yacute"),221 },
631 { wxT("Yuml"),376 },
632 { wxT("Zeta"),918 },
633 { wxT("aacute"),225 },
634 { wxT("acirc"),226 },
635 { wxT("acute"),180 },
636 { wxT("aelig"),230 },
637 { wxT("agrave"),224 },
638 { wxT("alefsym"),8501 },
639 { wxT("alpha"),945 },
640 { wxT("amp"),38 },
641 { wxT("and"),8743 },
642 { wxT("ang"),8736 },
643 { wxT("aring"),229 },
644 { wxT("asymp"),8776 },
645 { wxT("atilde"),227 },
646 { wxT("auml"),228 },
647 { wxT("bdquo"),8222 },
648 { wxT("beta"),946 },
649 { wxT("brvbar"),166 },
650 { wxT("bull"),8226 },
651 { wxT("cap"),8745 },
652 { wxT("ccedil"),231 },
653 { wxT("cedil"),184 },
654 { wxT("cent"),162 },
655 { wxT("chi"),967 },
656 { wxT("circ"),710 },
657 { wxT("clubs"),9827 },
658 { wxT("cong"),8773 },
659 { wxT("copy"),169 },
660 { wxT("crarr"),8629 },
661 { wxT("cup"),8746 },
662 { wxT("curren"),164 },
663 { wxT("dArr"),8659 },
664 { wxT("dagger"),8224 },
665 { wxT("darr"),8595 },
666 { wxT("deg"),176 },
667 { wxT("delta"),948 },
668 { wxT("diams"),9830 },
669 { wxT("divide"),247 },
670 { wxT("eacute"),233 },
671 { wxT("ecirc"),234 },
672 { wxT("egrave"),232 },
673 { wxT("empty"),8709 },
674 { wxT("emsp"),8195 },
675 { wxT("ensp"),8194 },
676 { wxT("epsilon"),949 },
677 { wxT("equiv"),8801 },
678 { wxT("eta"),951 },
679 { wxT("eth"),240 },
680 { wxT("euml"),235 },
681 { wxT("euro"),8364 },
682 { wxT("exist"),8707 },
683 { wxT("fnof"),402 },
684 { wxT("forall"),8704 },
685 { wxT("frac12"),189 },
686 { wxT("frac14"),188 },
687 { wxT("frac34"),190 },
688 { wxT("frasl"),8260 },
689 { wxT("gamma"),947 },
690 { wxT("ge"),8805 },
691 { wxT("gt"),62 },
692 { wxT("hArr"),8660 },
693 { wxT("harr"),8596 },
694 { wxT("hearts"),9829 },
695 { wxT("hellip"),8230 },
696 { wxT("iacute"),237 },
697 { wxT("icirc"),238 },
698 { wxT("iexcl"),161 },
699 { wxT("igrave"),236 },
700 { wxT("image"),8465 },
701 { wxT("infin"),8734 },
702 { wxT("int"),8747 },
703 { wxT("iota"),953 },
704 { wxT("iquest"),191 },
705 { wxT("isin"),8712 },
706 { wxT("iuml"),239 },
707 { wxT("kappa"),954 },
708 { wxT("lArr"),8656 },
709 { wxT("lambda"),955 },
710 { wxT("lang"),9001 },
711 { wxT("laquo"),171 },
712 { wxT("larr"),8592 },
713 { wxT("lceil"),8968 },
714 { wxT("ldquo"),8220 },
715 { wxT("le"),8804 },
716 { wxT("lfloor"),8970 },
717 { wxT("lowast"),8727 },
718 { wxT("loz"),9674 },
719 { wxT("lrm"),8206 },
720 { wxT("lsaquo"),8249 },
721 { wxT("lsquo"),8216 },
722 { wxT("lt"),60 },
723 { wxT("macr"),175 },
724 { wxT("mdash"),8212 },
725 { wxT("micro"),181 },
726 { wxT("middot"),183 },
727 { wxT("minus"),8722 },
728 { wxT("mu"),956 },
729 { wxT("nabla"),8711 },
730 { wxT("nbsp"),160 },
731 { wxT("ndash"),8211 },
732 { wxT("ne"),8800 },
733 { wxT("ni"),8715 },
734 { wxT("not"),172 },
735 { wxT("notin"),8713 },
736 { wxT("nsub"),8836 },
737 { wxT("ntilde"),241 },
738 { wxT("nu"),957 },
739 { wxT("oacute"),243 },
740 { wxT("ocirc"),244 },
741 { wxT("oelig"),339 },
742 { wxT("ograve"),242 },
743 { wxT("oline"),8254 },
744 { wxT("omega"),969 },
745 { wxT("omicron"),959 },
746 { wxT("oplus"),8853 },
747 { wxT("or"),8744 },
748 { wxT("ordf"),170 },
749 { wxT("ordm"),186 },
750 { wxT("oslash"),248 },
751 { wxT("otilde"),245 },
752 { wxT("otimes"),8855 },
753 { wxT("ouml"),246 },
754 { wxT("para"),182 },
755 { wxT("part"),8706 },
756 { wxT("permil"),8240 },
757 { wxT("perp"),8869 },
758 { wxT("phi"),966 },
759 { wxT("pi"),960 },
760 { wxT("piv"),982 },
761 { wxT("plusmn"),177 },
762 { wxT("pound"),163 },
763 { wxT("prime"),8242 },
764 { wxT("prod"),8719 },
765 { wxT("prop"),8733 },
766 { wxT("psi"),968 },
767 { wxT("quot"),34 },
768 { wxT("rArr"),8658 },
769 { wxT("radic"),8730 },
770 { wxT("rang"),9002 },
771 { wxT("raquo"),187 },
772 { wxT("rarr"),8594 },
773 { wxT("rceil"),8969 },
774 { wxT("rdquo"),8221 },
775 { wxT("real"),8476 },
776 { wxT("reg"),174 },
777 { wxT("rfloor"),8971 },
778 { wxT("rho"),961 },
779 { wxT("rlm"),8207 },
780 { wxT("rsaquo"),8250 },
781 { wxT("rsquo"),8217 },
782 { wxT("sbquo"),8218 },
783 { wxT("scaron"),353 },
784 { wxT("sdot"),8901 },
785 { wxT("sect"),167 },
786 { wxT("shy"),173 },
787 { wxT("sigma"),963 },
788 { wxT("sigmaf"),962 },
789 { wxT("sim"),8764 },
790 { wxT("spades"),9824 },
791 { wxT("sub"),8834 },
792 { wxT("sube"),8838 },
793 { wxT("sum"),8721 },
794 { wxT("sup"),8835 },
795 { wxT("sup1"),185 },
796 { wxT("sup2"),178 },
797 { wxT("sup3"),179 },
798 { wxT("supe"),8839 },
799 { wxT("szlig"),223 },
800 { wxT("tau"),964 },
801 { wxT("there4"),8756 },
802 { wxT("theta"),952 },
803 { wxT("thetasym"),977 },
804 { wxT("thinsp"),8201 },
805 { wxT("thorn"),254 },
806 { wxT("tilde"),732 },
807 { wxT("times"),215 },
808 { wxT("trade"),8482 },
809 { wxT("uArr"),8657 },
810 { wxT("uacute"),250 },
811 { wxT("uarr"),8593 },
812 { wxT("ucirc"),251 },
813 { wxT("ugrave"),249 },
814 { wxT("uml"),168 },
815 { wxT("upsih"),978 },
816 { wxT("upsilon"),965 },
817 { wxT("uuml"),252 },
818 { wxT("weierp"),8472 },
819 { wxT("xi"),958 },
820 { wxT("yacute"),253 },
821 { wxT("yen"),165 },
822 { wxT("yuml"),255 },
823 { wxT("zeta"),950 },
824 { wxT("zwj"),8205 },
825 { wxT("zwnj"),8204 },
826 {NULL, 0}};
827 static size_t substitutions_cnt = 0;
828
829 if (substitutions_cnt == 0)
830 while (substitutions[substitutions_cnt].code != 0)
831 substitutions_cnt++;
832
833 wxHtmlEntityInfo *info;
834 info = (wxHtmlEntityInfo*) bsearch(entity.c_str(), substitutions,
835 substitutions_cnt,
836 sizeof(wxHtmlEntityInfo),
837 wxHtmlEntityCompare);
838 if (info)
839 code = info->code;
840 }
841
842 if (code == 0)
843 return 0;
844 else
845 return GetCharForCode(code);
846}
847
848wxFSFile *wxHtmlParser::OpenURL(wxHtmlURLType WXUNUSED(type),
849 const wxString& url) const
850{
851 return GetFS()->OpenFile(url);
852}
853
854
855//-----------------------------------------------------------------------------
856// wxHtmlParser::ExtractCharsetInformation
857//-----------------------------------------------------------------------------
858
859class wxMetaTagParser : public wxHtmlParser
860{
861public:
862 wxMetaTagParser() { }
863
864 wxObject* GetProduct() { return NULL; }
865
866protected:
867 virtual void AddText(const wxChar* WXUNUSED(txt)) {}
868
869 DECLARE_NO_COPY_CLASS(wxMetaTagParser)
870};
871
872class wxMetaTagHandler : public wxHtmlTagHandler
873{
874public:
875 wxMetaTagHandler(wxString *retval) : wxHtmlTagHandler(), m_retval(retval) {}
876 wxString GetSupportedTags() { return wxT("META,BODY"); }
877 bool HandleTag(const wxHtmlTag& tag);
878
879private:
880 wxString *m_retval;
881
882 DECLARE_NO_COPY_CLASS(wxMetaTagHandler)
883};
884
885bool wxMetaTagHandler::HandleTag(const wxHtmlTag& tag)
886{
887 if (tag.GetName() == _T("BODY"))
888 {
889 m_Parser->StopParsing();
890 return FALSE;
891 }
892
893 if (tag.HasParam(_T("HTTP-EQUIV")) &&
894 tag.GetParam(_T("HTTP-EQUIV")).IsSameAs(_T("Content-Type"), false) &&
895 tag.HasParam(_T("CONTENT")))
896 {
897 wxString content = tag.GetParam(_T("CONTENT"));
898 if (content.Left(19) == _T("text/html; charset="))
899 {
900 *m_retval = content.Mid(19);
901 m_Parser->StopParsing();
902 }
903 }
904 return FALSE;
905}
906
907
908/*static*/
909wxString wxHtmlParser::ExtractCharsetInformation(const wxString& markup)
910{
911 wxString charset;
912 wxMetaTagParser parser;
913 parser.AddTagHandler(new wxMetaTagHandler(&charset));
914 parser.Parse(markup);
915 return charset;
916}
917
918
919#endif
wxWidgets (Impactor)