submenu preparation in two methods encapsulated

[wxWidgets.git] / src / html / htmlpars.cpp

diff --git a/src/html/htmlpars.cpp b/src/html/htmlpars.cpp
index d3f772440f2458b476968303b4d59ef1546c5699..ac2fc44880df4a532a87fa28afeef1d61a89da77 100644 (file)
--- a/src/html/htmlpars.cpp
+++ b/src/html/htmlpars.cpp
@@ -9,29 +9,56 @@
 
 
 #ifdef __GNUG__
 
 
 #ifdef __GNUG__

-#pragma implementation
+#pragma implementation "htmlpars.h"

 #endif
 
 #endif
 

-#include <wx/wxprec.h>
+#include "wx/wxprec.h"

 
 #include "wx/defs.h"
 
 #include "wx/defs.h"

-#if wxUSE_HTML
+#if wxUSE_HTML && wxUSE_STREAMS

 
 

-#ifdef __BORDLANDC__
+#ifdef __BORLANDC__

 #pragma hdrstop
 #endif
 
 #ifndef WXPRECOMP
 #pragma hdrstop
 #endif
 
 #ifndef WXPRECOMP

-#include <wx/wx.h>
+    #include "wx/log.h"
+    #include "wx/intl.h"

 #endif
 
 #include "wx/tokenzr.h"
 #include "wx/wfstream.h"
 #include "wx/url.h"
 #endif
 
 #include "wx/tokenzr.h"
 #include "wx/wfstream.h"
 #include "wx/url.h"

+#include "wx/fontmap.h"

 #include "wx/html/htmldefs.h"
 #include "wx/html/htmlpars.h"
 #include "wx/html/htmldefs.h"
 #include "wx/html/htmlpars.h"

+#include "wx/dynarray.h"
+#include "wx/arrimpl.cpp"

 
 

+//-----------------------------------------------------------------------------
+// wxHtmlParser helpers
+//-----------------------------------------------------------------------------
+
+class wxHtmlTextPiece
+{
+public:
+    wxHtmlTextPiece(int pos, int lng) : m_pos(pos), m_lng(lng) {}
+    int m_pos, m_lng;
+};
+
+WX_DECLARE_OBJARRAY(wxHtmlTextPiece, wxHtmlTextPieces);
+WX_DEFINE_OBJARRAY(wxHtmlTextPieces);

 
 

+class wxHtmlParserState
+{
+public:
+    wxHtmlTag         *m_curTag;
+    wxHtmlTag         *m_tags;
+    wxHtmlTextPieces  *m_textPieces;
+    int                m_curTextPiece;
+    wxString           m_source;
+    wxHtmlParserState *m_nextState;
+};

 
 //-----------------------------------------------------------------------------
 // wxHtmlParser
 
 //-----------------------------------------------------------------------------
 // wxHtmlParser


@@ -39,82 +66,249 @@
 
 IMPLEMENT_ABSTRACT_CLASS(wxHtmlParser,wxObject)
 
 
 IMPLEMENT_ABSTRACT_CLASS(wxHtmlParser,wxObject)
 

+wxHtmlParser::wxHtmlParser()
+    : wxObject(), m_HandlersHash(wxKEY_STRING),
+      m_FS(NULL), m_HandlersStack(NULL)
+{
+    m_entitiesParser = new wxHtmlEntitiesParser;
+    m_Tags = NULL;
+    m_CurTag = NULL;
+    m_TextPieces = NULL;
+    m_CurTextPiece = 0;
+    m_SavedStates = NULL;
+}

 
 

-wxObject* wxHtmlParser::Parse(const wxString& source)
+wxHtmlParser::~wxHtmlParser()

 {
 {

-    wxObject *result;
+    while (RestoreState()) {}
+    DestroyDOMTree();
+    
+    delete m_HandlersStack;
+    m_HandlersHash.Clear();
+    m_HandlersList.DeleteContents(TRUE);
+    m_HandlersList.Clear();
+    delete m_entitiesParser;
+}

 
 

+wxObject* wxHtmlParser::Parse(const wxString& source)
+{

     InitParser(source);
     DoParsing();
     InitParser(source);
     DoParsing();

-    result = GetProduct();
+    wxObject *result = GetProduct();

     DoneParser();
     return result;
 }
 
     DoneParser();
     return result;
 }
 

-
-

 void wxHtmlParser::InitParser(const wxString& source)
 {
 void wxHtmlParser::InitParser(const wxString& source)
 {

-    m_Source = source;
-    m_Cache = new wxHtmlTagsCache(m_Source);
+    SetSource(source);
+    m_stopParsing = FALSE;

 }
 }

-        
-        
-        
+

 void wxHtmlParser::DoneParser()
 {
 void wxHtmlParser::DoneParser()
 {

-    delete m_Cache;
-    m_Cache = NULL;
+    DestroyDOMTree();

 }
 
 }
 

+void wxHtmlParser::SetSource(const wxString& src)
+{
+    DestroyDOMTree();
+    m_Source = src;
+    CreateDOMTree();
+    m_CurTag = NULL;
+    m_CurTextPiece = 0;
+}

 
 

-
-#define HTML_MAX_BUFLEN 1024
-
-void wxHtmlParser::DoParsing(int begin_pos, int end_pos)
+void wxHtmlParser::CreateDOMTree()

 {
 {

-    char temp[HTML_BUFLEN], c;
-    int i;
-    int templen;
+    wxHtmlTagsCache cache(m_Source);
+    m_TextPieces = new wxHtmlTextPieces;
+    CreateDOMSubTree(NULL, 0, m_Source.Length(), &cache);
+    m_CurTextPiece = 0;
+}

 
 

-    templen = 0;
-    i = begin_pos;
+extern bool wxIsCDATAElement(const wxChar *tag);

 
 

-    while (i < end_pos) {
-        c = m_Source[i];
+void wxHtmlParser::CreateDOMSubTree(wxHtmlTag *cur,
+                                    int begin_pos, int end_pos,
+                                    wxHtmlTagsCache *cache)
+{
+    if (end_pos <= begin_pos) return;
+
+    wxChar c;
+    int i = begin_pos;
+    int textBeginning = begin_pos;
+
+    // If the tag contains CDATA text, we include the text between beginning
+    // and ending tag verbosely. Setting i=end_pos will skip to the very
+    // end of this function where text piece is added, bypassing any child
+    // tags parsing (CDATA element can't have child elements by definition):
+    if (cur != NULL && wxIsCDATAElement(cur->GetName().c_str()))
+    {
+        i = end_pos;
+    }

 
 

-        // continue building word:
-        if (c != '<') {
-            temp[templen++] = c;
-            if (templen == HTML_BUFLEN-1) {
-                temp[templen] = 0;
-                AddText(temp);
-                templen = 0;
+    while (i < end_pos)
+    {
+        c = m_Source.GetChar(i);
+
+        if (c == wxT('<'))
+        {
+            // add text to m_TextPieces:
+            if (i - textBeginning > 0)
+                m_TextPieces->Add(
+                    wxHtmlTextPiece(textBeginning, i - textBeginning));
+
+            // if it is a comment, skip it:
+            if (i < end_pos-6 && m_Source.GetChar(i+1) == wxT('!') &&
+                                 m_Source.GetChar(i+2) == wxT('-') &&
+                                 m_Source.GetChar(i+3) == wxT('-'))
+            {
+                // Comments begin with "<!--" and end with "--[ \t\r\n]*>"
+                // according to HTML 4.0
+                int dashes = 0;
+                i += 4;
+                while (i < end_pos)
+                {
+                    c = m_Source.GetChar(i++);
+                    if ((c == wxT(' ') || c == wxT('\n') ||
+                        c == wxT('\r') || c == wxT('\t')) && dashes >= 2) {}
+                    else if (c == wxT('>') && dashes >= 2)
+                    {
+                        textBeginning = i;
+                        break;
+                    }
+                    else if (c == wxT('-'))
+                        dashes++;
+                    else
+                        dashes = 0;
+                }

             }
             }

-            i++;
-        }

 
 

-        else if (c == '<')  {
-            wxHtmlTag tag(m_Source, i, end_pos, m_Cache);
+            // add another tag to the tree:
+            else if (i < end_pos-1 && m_Source.GetChar(i+1) != wxT('/'))
+               {
+                wxHtmlTag *chd;
+                if (cur)
+                    chd = new wxHtmlTag(cur, m_Source,
+                                        i, end_pos, cache, m_entitiesParser);
+                else
+                {
+                    chd = new wxHtmlTag(NULL, m_Source,
+                                        i, end_pos, cache, m_entitiesParser);
+                    if (!m_Tags)
+                    {
+                        // if this is the first tag to be created make the root
+                        // m_Tags point to it:
+                        m_Tags = chd;
+                    }
+                    else
+                    {
+                        // if there is already a root tag add this tag as
+                        // the last sibling:
+                        chd->m_Prev = m_Tags->GetLastSibling();
+                        chd->m_Prev->m_Next = chd;
+                    }
+                }
+
+                if (chd->HasEnding())
+                {
+                    CreateDOMSubTree(chd,
+                                     chd->GetBeginPos(), chd->GetEndPos1(),
+                                     cache);
+                    i = chd->GetEndPos2();
+                }
+                else
+                    i = chd->GetBeginPos();
+                
+                textBeginning = i;
+            }

 
 

-            if (templen) {
-                temp[templen] = 0;
-                AddText(temp);
-                templen = 0;
+            // ... or skip ending tag:
+            else
+            {
+                while (i < end_pos && m_Source.GetChar(i) != wxT('>')) i++;
+                textBeginning = i+1;

             }
             }

-            AddTag(tag);
-            if (tag.HasEnding()) i = tag.GetEndPos2();
-            else i = tag.GetBeginPos();

         }
         }

+        else i++;

     }
 
     }
 

-    if (templen) { // last word of block :-(
-        temp[templen] = 0;
-        AddText(temp);
+    // add remaining text to m_TextPieces:
+    if (end_pos - textBeginning > 0)
+        m_TextPieces->Add(
+            wxHtmlTextPiece(textBeginning, end_pos - textBeginning));
+}
+
+void wxHtmlParser::DestroyDOMTree()
+{
+    wxHtmlTag *t1, *t2;
+    t1 = m_Tags;
+    while (t1)
+    {
+        t2 = t1->GetNextSibling();
+        delete t1;
+        t1 = t2;

     }
     }

+    m_Tags = m_CurTag = NULL;
+
+    delete m_TextPieces;
+    m_TextPieces = NULL;

 }
 
 }
 

+void wxHtmlParser::DoParsing()
+{
+    m_CurTag = m_Tags;
+    m_CurTextPiece = 0;
+    DoParsing(0, m_Source.Length());
+}

 
 

+void wxHtmlParser::DoParsing(int begin_pos, int end_pos)
+{
+    if (end_pos <= begin_pos) return;
+
+    wxHtmlTextPieces& pieces = *m_TextPieces;
+    size_t piecesCnt = pieces.GetCount();
+
+    while (begin_pos < end_pos)
+    {
+        while (m_CurTag && m_CurTag->GetBeginPos() < begin_pos)
+            m_CurTag = m_CurTag->GetNextTag();
+        while (m_CurTextPiece < piecesCnt &&
+               pieces[m_CurTextPiece].m_pos < begin_pos)
+            m_CurTextPiece++;
+
+        if (m_CurTextPiece < piecesCnt &&
+            (!m_CurTag ||
+             pieces[m_CurTextPiece].m_pos < m_CurTag->GetBeginPos()))
+        {
+            // Add text:
+            AddText(GetEntitiesParser()->Parse(
+                       m_Source.Mid(pieces[m_CurTextPiece].m_pos,
+                                    pieces[m_CurTextPiece].m_lng)));
+            begin_pos = pieces[m_CurTextPiece].m_pos +
+                        pieces[m_CurTextPiece].m_lng;
+            m_CurTextPiece++;
+        }
+        else if (m_CurTag)
+        {
+            // Add tag:
+            if (m_CurTag)
+            {
+                if (m_CurTag->HasEnding())
+                    begin_pos = m_CurTag->GetEndPos2();
+                else
+                    begin_pos = m_CurTag->GetBeginPos();
+            }
+            wxHtmlTag *t = m_CurTag;
+            m_CurTag = m_CurTag->GetNextTag();
+            AddTag(*t);
+            if (m_stopParsing)
+                return;
+        }
+        else break;
+    }
+}

 
 void wxHtmlParser::AddTag(const wxHtmlTag& tag)
 {
 
 void wxHtmlParser::AddTag(const wxHtmlTag& tag)
 {


@@ -123,48 +317,584 @@ void wxHtmlParser::AddTag(const wxHtmlTag& tag)
 
     h = (wxHtmlTagHandler*) m_HandlersHash.Get(tag.GetName());
     if (h)
 
     h = (wxHtmlTagHandler*) m_HandlersHash.Get(tag.GetName());
     if (h)

-        inner = h -> HandleTag(tag);
-    if (!inner) {
+    {
+        inner = h->HandleTag(tag);
+        if (m_stopParsing)
+            return;
+    }
+    if (!inner)
+    {

         if (tag.HasEnding())
             DoParsing(tag.GetBeginPos(), tag.GetEndPos1());
     }
 }
 
         if (tag.HasEnding())
             DoParsing(tag.GetBeginPos(), tag.GetEndPos1());
     }
 }
 

-
-

 void wxHtmlParser::AddTagHandler(wxHtmlTagHandler *handler)
 {
 void wxHtmlParser::AddTagHandler(wxHtmlTagHandler *handler)
 {

-    wxString s(handler -> GetSupportedTags());
-    wxStringTokenizer tokenizer(s, ", ");
+    wxString s(handler->GetSupportedTags());
+    wxStringTokenizer tokenizer(s, wxT(", "));

 
 

-#if (wxVERSION_NUMBER < 2100)
-    while (tokenizer.HasMoreToken())
-#else

     while (tokenizer.HasMoreTokens())
     while (tokenizer.HasMoreTokens())

-#endif
-        m_HandlersHash.Put(tokenizer.NextToken(), handler);
+        m_HandlersHash.Put(tokenizer.GetNextToken(), handler);

 
     if (m_HandlersList.IndexOf(handler) == wxNOT_FOUND)
         m_HandlersList.Append(handler);
 
 
     if (m_HandlersList.IndexOf(handler) == wxNOT_FOUND)
         m_HandlersList.Append(handler);
 

-    handler -> SetParser(this);
+    handler->SetParser(this);

 }
 
 }
 

+void wxHtmlParser::PushTagHandler(wxHtmlTagHandler *handler, wxString tags)
+{
+    wxStringTokenizer tokenizer(tags, wxT(", "));
+    wxString key;

 
 

+    if (m_HandlersStack == NULL)
+    {
+        m_HandlersStack = new wxList;
+        m_HandlersStack->DeleteContents(TRUE);
+    }

 
 

-wxHtmlParser::~wxHtmlParser()
+    m_HandlersStack->Insert(new wxHashTable(m_HandlersHash));
+
+    while (tokenizer.HasMoreTokens())
+    {
+        key = tokenizer.GetNextToken();
+        m_HandlersHash.Delete(key);
+        m_HandlersHash.Put(key, handler);
+    }
+}
+
+void wxHtmlParser::PopTagHandler()

 {
 {

-    m_HandlersHash.Clear();
-    m_HandlersList.DeleteContents(TRUE);
-    m_HandlersList.Clear();
+    wxNode *first;
+
+    if (m_HandlersStack == NULL ||
+        (first = m_HandlersStack->GetFirst()) == NULL)
+    {
+        wxLogWarning(_("Warning: attempt to remove HTML tag handler from empty stack."));
+        return;
+    }
+    m_HandlersHash = *((wxHashTable*) first->GetData());
+    m_HandlersStack->DeleteNode(first);
+}
+
+void wxHtmlParser::SetSourceAndSaveState(const wxString& src)
+{
+    wxHtmlParserState *s = new wxHtmlParserState;
+
+    s->m_curTag = m_CurTag;
+    s->m_tags = m_Tags;
+    s->m_textPieces = m_TextPieces;
+    s->m_curTextPiece = m_CurTextPiece;
+    s->m_source = m_Source;
+
+    s->m_nextState = m_SavedStates;
+    m_SavedStates = s;
+
+    m_CurTag = NULL;
+    m_Tags = NULL;
+    m_TextPieces = NULL;
+    m_CurTextPiece = 0;
+    m_Source = wxEmptyString;
+
+    SetSource(src);

 }
 
 }
 

+bool wxHtmlParser::RestoreState()
+{
+    if (!m_SavedStates) return FALSE;
+
+    DestroyDOMTree();
+
+    wxHtmlParserState *s = m_SavedStates;
+    m_SavedStates = s->m_nextState;
+
+    m_CurTag = s->m_curTag;
+    m_Tags = s->m_tags;
+    m_TextPieces = s->m_textPieces;
+    m_CurTextPiece = s->m_curTextPiece;
+    m_Source = s->m_source;

 
 

+    delete s;
+    return TRUE;
+}

 
 //-----------------------------------------------------------------------------
 // wxHtmlTagHandler
 //-----------------------------------------------------------------------------
 
 IMPLEMENT_ABSTRACT_CLASS(wxHtmlTagHandler,wxObject)
 
 //-----------------------------------------------------------------------------
 // wxHtmlTagHandler
 //-----------------------------------------------------------------------------
 
 IMPLEMENT_ABSTRACT_CLASS(wxHtmlTagHandler,wxObject)

+
+
+//-----------------------------------------------------------------------------
+// wxHtmlEntitiesParser
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxHtmlEntitiesParser,wxObject)
+
+wxHtmlEntitiesParser::wxHtmlEntitiesParser()
+#if wxUSE_WCHAR_T && !wxUSE_UNICODE
+    : m_conv(NULL), m_encoding(wxFONTENCODING_SYSTEM)
+#endif
+{
+}
+
+wxHtmlEntitiesParser::~wxHtmlEntitiesParser()
+{
+#if wxUSE_WCHAR_T && !wxUSE_UNICODE
+    delete m_conv;
+#endif
+}
+
+void wxHtmlEntitiesParser::SetEncoding(wxFontEncoding encoding)
+{
+#if wxUSE_WCHAR_T && !wxUSE_UNICODE
+    if (encoding == m_encoding)
+        return;
+
+    delete m_conv;
+
+    m_encoding = encoding;
+    if (m_encoding == wxFONTENCODING_SYSTEM)
+        m_conv = NULL;
+    else
+        m_conv = new wxCSConv(wxFontMapper::GetEncodingName(m_encoding));
+#else
+    (void) encoding;
+#endif
+}
+
+wxString wxHtmlEntitiesParser::Parse(const wxString& input)
+{
+    const wxChar *c, *last;
+    const wxChar *in_str = input.c_str();
+    wxString output;
+    
+    output.reserve(input.length());
+
+    for (c = in_str, last = in_str; *c != wxT('\0'); c++)
+    {
+        if (*c == wxT('&'))
+        {
+            if (c - last > 0)
+                output.append(last, c - last);
+            if (++c == wxT('\0')) break;
+        
+            wxString entity;
+            const wxChar *ent_s = c;
+            wxChar entity_char;
+        
+            for (; (*c >= wxT('a') && *c <= wxT('z')) ||
+                   (*c >= wxT('A') && *c <= wxT('Z')) ||
+                   (*c >= wxT('0') && *c <= wxT('9')) ||
+                   *c == wxT('_') || *c == wxT('#'); c++) {}
+            entity.append(ent_s, c - ent_s);
+            if (*c != wxT(';')) c--;
+            last = c+1;
+            entity_char = GetEntityChar(entity);
+            if (entity_char)
+                output << entity_char;
+            else
+            {
+                output.append(ent_s-1, c-ent_s+2);
+                wxLogDebug(wxT("Unrecognized HTML entity: '%s'"), entity.c_str());
+            }
+        }
+    }
+    if (*last != wxT('\0'))
+        output.append(last);
+    return output;
+}
+
+struct wxHtmlEntityInfo
+{
+    const wxChar *name;
+    unsigned code;
+};
+
+extern "C" int LINKAGEMODE wxHtmlEntityCompare(const void *key, const void *item)
+{
+    return wxStrcmp((wxChar*)key, ((wxHtmlEntityInfo*)item)->name);
+}
+
+#if !wxUSE_UNICODE
+wxChar wxHtmlEntitiesParser::GetCharForCode(unsigned code)
+{
+#if wxUSE_WCHAR_T
+    char buf[2];
+    wchar_t wbuf[2];
+    wbuf[0] = (wchar_t)code;
+    wbuf[1] = 0;
+    wxMBConv *conv = m_conv ? m_conv : &wxConvLocal;
+    if (conv->WC2MB(buf, wbuf, 2) == (size_t)-1)
+        return '?';
+    return buf[0];
+#else
+    return (code < 256) ? (wxChar)code : '?';

 #endif
 #endif

+}
+#endif
+
+wxChar wxHtmlEntitiesParser::GetEntityChar(const wxString& entity)
+{
+    unsigned code = 0;
+
+    if (entity[0] == wxT('#'))
+    {
+        const wxChar *ent_s = entity.c_str();
+        const wxChar *format;
+
+        if (ent_s[1] == wxT('x') || ent_s[1] == wxT('X'))
+        {
+            format = wxT("%x");
+            ent_s++;
+        }
+        else
+            format = wxT("%u");
+        ent_s++;
+
+        if (wxSscanf(ent_s, format, &code) != 1)
+            code = 0;
+    }
+    else
+    {
+        static wxHtmlEntityInfo substitutions[] = {
+            { wxT("AElig"),198 },
+            { wxT("Aacute"),193 },
+            { wxT("Acirc"),194 },
+            { wxT("Agrave"),192 },
+            { wxT("Alpha"),913 },
+            { wxT("Aring"),197 },
+            { wxT("Atilde"),195 },
+            { wxT("Auml"),196 },
+            { wxT("Beta"),914 },
+            { wxT("Ccedil"),199 },
+            { wxT("Chi"),935 },
+            { wxT("Dagger"),8225 },
+            { wxT("Delta"),916 },
+            { wxT("ETH"),208 },
+            { wxT("Eacute"),201 },
+            { wxT("Ecirc"),202 },
+            { wxT("Egrave"),200 },
+            { wxT("Epsilon"),917 },
+            { wxT("Eta"),919 },
+            { wxT("Euml"),203 },
+            { wxT("Gamma"),915 },
+            { wxT("Iacute"),205 },
+            { wxT("Icirc"),206 },
+            { wxT("Igrave"),204 },
+            { wxT("Iota"),921 },
+            { wxT("Iuml"),207 },
+            { wxT("Kappa"),922 },
+            { wxT("Lambda"),923 },
+            { wxT("Mu"),924 },
+            { wxT("Ntilde"),209 },
+            { wxT("Nu"),925 },
+            { wxT("OElig"),338 },
+            { wxT("Oacute"),211 },
+            { wxT("Ocirc"),212 },
+            { wxT("Ograve"),210 },
+            { wxT("Omega"),937 },
+            { wxT("Omicron"),927 },
+            { wxT("Oslash"),216 },
+            { wxT("Otilde"),213 },
+            { wxT("Ouml"),214 },
+            { wxT("Phi"),934 },
+            { wxT("Pi"),928 },
+            { wxT("Prime"),8243 },
+            { wxT("Psi"),936 },
+            { wxT("Rho"),929 },
+            { wxT("Scaron"),352 },
+            { wxT("Sigma"),931 },
+            { wxT("THORN"),222 },
+            { wxT("Tau"),932 },
+            { wxT("Theta"),920 },
+            { wxT("Uacute"),218 },
+            { wxT("Ucirc"),219 },
+            { wxT("Ugrave"),217 },
+            { wxT("Upsilon"),933 },
+            { wxT("Uuml"),220 },
+            { wxT("Xi"),926 },
+            { wxT("Yacute"),221 },
+            { wxT("Yuml"),376 },
+            { wxT("Zeta"),918 },
+            { wxT("aacute"),225 },
+            { wxT("acirc"),226 },
+            { wxT("acute"),180 },
+            { wxT("aelig"),230 },
+            { wxT("agrave"),224 },
+            { wxT("alefsym"),8501 },
+            { wxT("alpha"),945 },
+            { wxT("amp"),38 },
+            { wxT("and"),8743 },
+            { wxT("ang"),8736 },
+            { wxT("aring"),229 },
+            { wxT("asymp"),8776 },
+            { wxT("atilde"),227 },
+            { wxT("auml"),228 },
+            { wxT("bdquo"),8222 },
+            { wxT("beta"),946 },
+            { wxT("brvbar"),166 },
+            { wxT("bull"),8226 },
+            { wxT("cap"),8745 },
+            { wxT("ccedil"),231 },
+            { wxT("cedil"),184 },
+            { wxT("cent"),162 },
+            { wxT("chi"),967 },
+            { wxT("circ"),710 },
+            { wxT("clubs"),9827 },
+            { wxT("cong"),8773 },
+            { wxT("copy"),169 },
+            { wxT("crarr"),8629 },
+            { wxT("cup"),8746 },
+            { wxT("curren"),164 },
+            { wxT("dArr"),8659 },
+            { wxT("dagger"),8224 },
+            { wxT("darr"),8595 },
+            { wxT("deg"),176 },
+            { wxT("delta"),948 },
+            { wxT("diams"),9830 },
+            { wxT("divide"),247 },
+            { wxT("eacute"),233 },
+            { wxT("ecirc"),234 },
+            { wxT("egrave"),232 },
+            { wxT("empty"),8709 },
+            { wxT("emsp"),8195 },
+            { wxT("ensp"),8194 },
+            { wxT("epsilon"),949 },
+            { wxT("equiv"),8801 },
+            { wxT("eta"),951 },
+            { wxT("eth"),240 },
+            { wxT("euml"),235 },
+            { wxT("euro"),8364 },
+            { wxT("exist"),8707 },
+            { wxT("fnof"),402 },
+            { wxT("forall"),8704 },
+            { wxT("frac12"),189 },
+            { wxT("frac14"),188 },
+            { wxT("frac34"),190 },
+            { wxT("frasl"),8260 },
+            { wxT("gamma"),947 },
+            { wxT("ge"),8805 },
+            { wxT("gt"),62 },
+            { wxT("hArr"),8660 },
+            { wxT("harr"),8596 },
+            { wxT("hearts"),9829 },
+            { wxT("hellip"),8230 },
+            { wxT("iacute"),237 },
+            { wxT("icirc"),238 },
+            { wxT("iexcl"),161 },
+            { wxT("igrave"),236 },
+            { wxT("image"),8465 },
+            { wxT("infin"),8734 },
+            { wxT("int"),8747 },
+            { wxT("iota"),953 },
+            { wxT("iquest"),191 },
+            { wxT("isin"),8712 },
+            { wxT("iuml"),239 },
+            { wxT("kappa"),954 },
+            { wxT("lArr"),8656 },
+            { wxT("lambda"),955 },
+            { wxT("lang"),9001 },
+            { wxT("laquo"),171 },
+            { wxT("larr"),8592 },
+            { wxT("lceil"),8968 },
+            { wxT("ldquo"),8220 },
+            { wxT("le"),8804 },
+            { wxT("lfloor"),8970 },
+            { wxT("lowast"),8727 },
+            { wxT("loz"),9674 },
+            { wxT("lrm"),8206 },
+            { wxT("lsaquo"),8249 },
+            { wxT("lsquo"),8216 },
+            { wxT("lt"),60 },
+            { wxT("macr"),175 },
+            { wxT("mdash"),8212 },
+            { wxT("micro"),181 },
+            { wxT("middot"),183 },
+            { wxT("minus"),8722 },
+            { wxT("mu"),956 },
+            { wxT("nabla"),8711 },
+            { wxT("nbsp"),160 },
+            { wxT("ndash"),8211 },
+            { wxT("ne"),8800 },
+            { wxT("ni"),8715 },
+            { wxT("not"),172 },
+            { wxT("notin"),8713 },
+            { wxT("nsub"),8836 },
+            { wxT("ntilde"),241 },
+            { wxT("nu"),957 },
+            { wxT("oacute"),243 },
+            { wxT("ocirc"),244 },
+            { wxT("oelig"),339 },
+            { wxT("ograve"),242 },
+            { wxT("oline"),8254 },
+            { wxT("omega"),969 },
+            { wxT("omicron"),959 },
+            { wxT("oplus"),8853 },
+            { wxT("or"),8744 },
+            { wxT("ordf"),170 },
+            { wxT("ordm"),186 },
+            { wxT("oslash"),248 },
+            { wxT("otilde"),245 },
+            { wxT("otimes"),8855 },
+            { wxT("ouml"),246 },
+            { wxT("para"),182 },
+            { wxT("part"),8706 },
+            { wxT("permil"),8240 },
+            { wxT("perp"),8869 },
+            { wxT("phi"),966 },
+            { wxT("pi"),960 },
+            { wxT("piv"),982 },
+            { wxT("plusmn"),177 },
+            { wxT("pound"),163 },
+            { wxT("prime"),8242 },
+            { wxT("prod"),8719 },
+            { wxT("prop"),8733 },
+            { wxT("psi"),968 },
+            { wxT("quot"),34 },
+            { wxT("rArr"),8658 },
+            { wxT("radic"),8730 },
+            { wxT("rang"),9002 },
+            { wxT("raquo"),187 },
+            { wxT("rarr"),8594 },
+            { wxT("rceil"),8969 },
+            { wxT("rdquo"),8221 },
+            { wxT("real"),8476 },
+            { wxT("reg"),174 },
+            { wxT("rfloor"),8971 },
+            { wxT("rho"),961 },
+            { wxT("rlm"),8207 },
+            { wxT("rsaquo"),8250 },
+            { wxT("rsquo"),8217 },
+            { wxT("sbquo"),8218 },
+            { wxT("scaron"),353 },
+            { wxT("sdot"),8901 },
+            { wxT("sect"),167 },
+            { wxT("shy"),173 },
+            { wxT("sigma"),963 },
+            { wxT("sigmaf"),962 },
+            { wxT("sim"),8764 },
+            { wxT("spades"),9824 },
+            { wxT("sub"),8834 },
+            { wxT("sube"),8838 },
+            { wxT("sum"),8721 },
+            { wxT("sup"),8835 },
+            { wxT("sup1"),185 },
+            { wxT("sup2"),178 },
+            { wxT("sup3"),179 },
+            { wxT("supe"),8839 },
+            { wxT("szlig"),223 },
+            { wxT("tau"),964 },
+            { wxT("there4"),8756 },
+            { wxT("theta"),952 },
+            { wxT("thetasym"),977 },
+            { wxT("thinsp"),8201 },
+            { wxT("thorn"),254 },
+            { wxT("tilde"),732 },
+            { wxT("times"),215 },
+            { wxT("trade"),8482 },
+            { wxT("uArr"),8657 },
+            { wxT("uacute"),250 },
+            { wxT("uarr"),8593 },
+            { wxT("ucirc"),251 },
+            { wxT("ugrave"),249 },
+            { wxT("uml"),168 },
+            { wxT("upsih"),978 },
+            { wxT("upsilon"),965 },
+            { wxT("uuml"),252 },
+            { wxT("weierp"),8472 },
+            { wxT("xi"),958 },
+            { wxT("yacute"),253 },
+            { wxT("yen"),165 },
+            { wxT("yuml"),255 },
+            { wxT("zeta"),950 },
+            { wxT("zwj"),8205 },
+            { wxT("zwnj"),8204 },
+            {NULL, 0}};
+        static size_t substitutions_cnt = 0;
+
+        if (substitutions_cnt == 0)
+            while (substitutions[substitutions_cnt].code != 0)
+                substitutions_cnt++;
+
+        wxHtmlEntityInfo *info;
+        info = (wxHtmlEntityInfo*) bsearch(entity.c_str(), substitutions,
+                                           substitutions_cnt,
+                                           sizeof(wxHtmlEntityInfo),
+                                           wxHtmlEntityCompare);
+        if (info)
+            code = info->code;
+    }
+
+    if (code == 0)
+        return 0;
+    else
+        return GetCharForCode(code);
+}
+
+wxFSFile *wxHtmlParser::OpenURL(wxHtmlURLType WXUNUSED(type), 
+                                const wxString& url) const
+{
+    return GetFS()->OpenFile(url);
+}
+
+
+//-----------------------------------------------------------------------------
+// wxHtmlParser::ExtractCharsetInformation
+//-----------------------------------------------------------------------------

 
 

+class wxMetaTagParser : public wxHtmlParser
+{
+public:
+    wxObject* GetProduct() { return NULL; }
+protected:
+    virtual void AddText(const wxChar* WXUNUSED(txt)) {}
+};
+
+class wxMetaTagHandler : public wxHtmlTagHandler
+{
+public:
+    wxMetaTagHandler(wxString *retval) : wxHtmlTagHandler(), m_retval(retval) {}
+    wxString GetSupportedTags() { return wxT("META,BODY"); }
+    bool HandleTag(const wxHtmlTag& tag);
+
+private:
+    wxString *m_retval;
+};
+
+bool wxMetaTagHandler::HandleTag(const wxHtmlTag& tag)
+{
+    if (tag.GetName() == _T("BODY"))
+    {
+        m_Parser->StopParsing();
+        return FALSE;
+    }
+
+    if (tag.HasParam(_T("HTTP-EQUIV")) &&
+        tag.GetParam(_T("HTTP-EQUIV")) == _T("Content-Type") &&
+        tag.HasParam(_T("CONTENT")))
+    {
+        wxString content = tag.GetParam(_T("CONTENT"));
+        if (content.Left(19) == _T("text/html; charset="))
+        {
+            *m_retval = content.Mid(19);
+            m_Parser->StopParsing();
+        }
+    }
+    return FALSE;
+}
+
+
+/*static*/
+wxString wxHtmlParser::ExtractCharsetInformation(const wxString& markup)
+{
+    wxString charset;
+    wxMetaTagParser parser;
+    parser.AddTagHandler(new wxMetaTagHandler(&charset));
+    parser.Parse(markup);
+    return charset;
+}
+
+
+#endif