fix for potention crash when conversion fails

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

diff --git a/src/html/htmltag.cpp b/src/html/htmltag.cpp
index efc57a674d728d1127d3036e36ae65a587f80bf8..6686cb9cba08f95b2fd03173ab609d701da19fe2 100644 (file)
--- a/src/html/htmltag.cpp
+++ b/src/html/htmltag.cpp
@@ -1,31 +1,27 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        htmltag.cpp
+// Name:        src/html/htmltag.cpp

 // Purpose:     wxHtmlTag class (represents single tag)
 // Author:      Vaclav Slavik
 // RCS-ID:      $Id$
 // Copyright:   (c) 1999 Vaclav Slavik
 // Purpose:     wxHtmlTag class (represents single tag)
 // Author:      Vaclav Slavik
 // RCS-ID:      $Id$
 // Copyright:   (c) 1999 Vaclav Slavik

-// Licence:     wxWindows Licence
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 /////////////////////////////////////////////////////////////////////////////
 

+#include "wx/wxprec.h"

 
 

-#ifdef __GNUG__
-#pragma implementation
+#ifdef __BORLANDC__
+    #pragma hdrstop

 #endif
 
 #endif
 

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

 #if wxUSE_HTML
 
 #if wxUSE_HTML
 

-#ifdef __BORDLANDC__
-#pragma hdrstop
-#endif
+#include "wx/html/htmltag.h"

 
 #ifndef WXPRECOMP
 
 #ifndef WXPRECOMP

-#include "wx/wx.h"
+    #include "wx/colour.h"

 #endif
 
 #endif
 

-#include "wx/html/htmltag.h"
+#include "wx/html/htmlpars.h"

 #include <stdio.h> // for vsscanf
 #include <stdarg.h>
 
 #include <stdio.h> // for vsscanf
 #include <stdarg.h>
 


@@ -56,57 +52,121 @@ IMPLEMENT_CLASS(wxHtmlTagsCache,wxObject)
 
 #define CACHE_INCREMENT  64
 
 
 #define CACHE_INCREMENT  64
 

+bool wxIsCDATAElement(const wxChar *tag)
+{
+    return (wxStrcmp(tag, _T("SCRIPT")) == 0) ||
+           (wxStrcmp(tag, _T("STYLE")) == 0);
+}
+

 wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
 {
     const wxChar *src = source.c_str();
 wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
 {
     const wxChar *src = source.c_str();

-    int i, tg, pos, stpos;
-    int lng = source.Length();
-    wxChar dummy[256];
+    int lng = source.length();
+    wxChar tagBuffer[256];

 
     m_Cache = NULL;
     m_CacheSize = 0;
     m_CachePos = 0;
 
 
     m_Cache = NULL;
     m_CacheSize = 0;
     m_CachePos = 0;
 

-    pos = 0;
-    while (pos < lng) 
+    int pos = 0;
+    while (pos < lng)

     {
         if (src[pos] == wxT('<'))   // tag found:
     {
         if (src[pos] == wxT('<'))   // tag found:

-           {
+        {

             if (m_CacheSize % CACHE_INCREMENT == 0)
                 m_Cache = (wxHtmlCacheItem*) realloc(m_Cache, (m_CacheSize + CACHE_INCREMENT) * sizeof(wxHtmlCacheItem));
             if (m_CacheSize % CACHE_INCREMENT == 0)
                 m_Cache = (wxHtmlCacheItem*) realloc(m_Cache, (m_CacheSize + CACHE_INCREMENT) * sizeof(wxHtmlCacheItem));

-            tg = m_CacheSize++;
-            m_Cache[tg].Key = stpos = pos++;
-            dummy[0] = 0; i = 0;
-            while (pos < lng && 
-                   src[pos] != wxT('>') &&
-                   src[pos] != wxT(' ') && src[pos] != wxT('\r') && 
-                   src[pos] != wxT('\n') && src[pos] != wxT('\t')) 
-                   {
-                dummy[i] = src[pos++];
-                if ((dummy[i] >= wxT('a')) && (dummy[i] <= wxT('z'))) dummy[i] -= (wxT('a') - wxT('A'));
-                i++;
+            int tg = m_CacheSize++;
+            int stpos = pos++;
+            m_Cache[tg].Key = stpos;
+
+            int i;
+            for ( i = 0;
+                  pos < lng && i < (int)WXSIZEOF(tagBuffer) - 1 &&
+                  src[pos] != wxT('>') && !wxIsspace(src[pos]);
+                  i++, pos++ )
+            {
+                tagBuffer[i] = (wxChar)wxToupper(src[pos]);

             }
             }

-            dummy[i] = 0;
+            tagBuffer[i] = _T('\0');
+

             m_Cache[tg].Name = new wxChar[i+1];
             m_Cache[tg].Name = new wxChar[i+1];

-            memcpy(m_Cache[tg].Name, dummy, (i+1)*sizeof(wxChar));
+            memcpy(m_Cache[tg].Name, tagBuffer, (i+1)*sizeof(wxChar));

 
             while (pos < lng && src[pos] != wxT('>')) pos++;
 
             if (src[stpos+1] == wxT('/')) // ending tag:
 
             while (pos < lng && src[pos] != wxT('>')) pos++;
 
             if (src[stpos+1] == wxT('/')) // ending tag:

-           {
+            {

                 m_Cache[tg].End1 = m_Cache[tg].End2 = -2;
                 // find matching begin tag:
                 for (i = tg; i >= 0; i--)
                 m_Cache[tg].End1 = m_Cache[tg].End2 = -2;
                 // find matching begin tag:
                 for (i = tg; i >= 0; i--)

-                    if ((m_Cache[i].End1 == -1) && (wxStrcmp(m_Cache[i].Name, dummy+1) == 0)) 
-                           {
+                    if ((m_Cache[i].End1 == -1) && (wxStrcmp(m_Cache[i].Name, tagBuffer+1) == 0))
+                    {

                         m_Cache[i].End1 = stpos;
                         m_Cache[i].End2 = pos + 1;
                         break;
                     }
             }
                         m_Cache[i].End1 = stpos;
                         m_Cache[i].End2 = pos + 1;
                         break;
                     }
             }

-            else 
-               {
+            else
+            {

                 m_Cache[tg].End1 = m_Cache[tg].End2 = -1;
                 m_Cache[tg].End1 = m_Cache[tg].End2 = -1;

+
+                if (wxIsCDATAElement(tagBuffer))
+                {
+                    // store the orig pos in case we are missing the closing
+                    // tag (see below)
+                    wxInt32 old_pos = pos;
+                    bool foundCloseTag = false;
+
+                    // find next matching tag
+                    int tag_len = wxStrlen(tagBuffer);
+                    while (pos < lng)
+                    {
+                        // find the ending tag
+                        while (pos + 1 < lng &&
+                               (src[pos] != '<' || src[pos+1] != '/'))
+                            ++pos;
+                        if (src[pos] == '<')
+                            ++pos;
+
+                        // see if it matches
+                        int match_pos = 0;
+                        while (pos < lng && match_pos < tag_len && src[pos] != '>' && src[pos] != '<') {
+                            // cast to wxChar needed to suppress warning in
+                            // Unicode build
+                            if ((wxChar)wxToupper(src[pos]) == tagBuffer[match_pos]) {
+                                ++match_pos;
+                            }
+                            else if (src[pos] == wxT(' ') || src[pos] == wxT('\n') ||
+                                src[pos] == wxT('\r') || src[pos] == wxT('\t')) {
+                                // need to skip over these
+                            }
+                            else {
+                                match_pos = 0;
+                            }
+                            ++pos;
+                        }
+
+                        // found a match
+                        if (match_pos == tag_len)
+                        {
+                            pos = pos - tag_len - 3;
+                            foundCloseTag = true;
+                            break;
+                        }
+                        else // keep looking for the closing tag
+                        {
+                            ++pos;
+                        }
+                    }
+                    if (!foundCloseTag)
+                    {
+                        // we didn't find closing tag; this means the markup
+                        // is incorrect and the best thing we can do is to
+                        // ignore the unclosed tag and continue parsing as if
+                        // it didn't exist:
+                        pos = old_pos;
+                    }
+                }

             }
         }
 
             }
         }
 


@@ -114,22 +174,34 @@ wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
     }
 
     // ok, we're done, now we'll free .Name members of cache - we don't need it anymore:
     }
 
     // ok, we're done, now we'll free .Name members of cache - we don't need it anymore:

-    for (i = 0; i < m_CacheSize; i++) 
+    for (int i = 0; i < m_CacheSize; i++)

     {
         delete[] m_Cache[i].Name;
         m_Cache[i].Name = NULL;
     }
 }
 
     {
         delete[] m_Cache[i].Name;
         m_Cache[i].Name = NULL;
     }
 }
 

-
-

 void wxHtmlTagsCache::QueryTag(int at, int* end1, int* end2)
 {
     if (m_Cache == NULL) return;
 void wxHtmlTagsCache::QueryTag(int at, int* end1, int* end2)
 {
     if (m_Cache == NULL) return;

-    if (m_Cache[m_CachePos].Key != at) 
+    if (m_Cache[m_CachePos].Key != at)

     {
         int delta = (at < m_Cache[m_CachePos].Key) ? -1 : 1;
     {
         int delta = (at < m_Cache[m_CachePos].Key) ? -1 : 1;

-        do {m_CachePos += delta;} while (m_Cache[m_CachePos].Key != at);
+        do
+        {
+            if ( m_CachePos < 0 || m_CachePos == m_CacheSize )
+            {
+                // something is very wrong with HTML, give up by returning an
+                // impossibly large value which is going to be ignored by the
+                // caller
+                *end1 =
+                *end2 = INT_MAX;
+                return;
+            }
+
+            m_CachePos += delta;
+        }
+        while (m_Cache[m_CachePos].Key != at);

     }
     *end1 = m_Cache[m_CachePos].End1;
     *end2 = m_Cache[m_CachePos].End2;
     }
     *end1 = m_Cache[m_CachePos].End1;
     *end2 = m_Cache[m_CachePos].End2;


@@ -144,178 +216,297 @@ void wxHtmlTagsCache::QueryTag(int at, int* end1, int* end2)
 
 IMPLEMENT_CLASS(wxHtmlTag,wxObject)
 
 
 IMPLEMENT_CLASS(wxHtmlTag,wxObject)
 

-wxHtmlTag::wxHtmlTag(const wxString& source, int pos, int end_pos, wxHtmlTagsCache* cache) : wxObject()
+wxHtmlTag::wxHtmlTag(wxHtmlTag *parent,
+                     const wxString& source, int pos, int end_pos,
+                     wxHtmlTagsCache *cache,
+                     wxHtmlEntitiesParser *entParser) : wxObject()

 {
 {

+    /* Setup DOM relations */
+
+    m_Next = NULL;
+    m_FirstChild = m_LastChild = NULL;
+    m_Parent = parent;
+    if (parent)
+    {
+        m_Prev = m_Parent->m_LastChild;
+        if (m_Prev == NULL)
+            m_Parent->m_FirstChild = this;
+        else
+            m_Prev->m_Next = this;
+        m_Parent->m_LastChild = this;
+    }
+    else
+        m_Prev = NULL;
+
+    /* Find parameters and their values: */
+

     int i;
     int i;

-    char c;
+    wxChar c;

 
     // fill-in name, params and begin pos:
 
     // fill-in name, params and begin pos:

-    m_Name = m_Params = wxEmptyString;

     i = pos+1;
     i = pos+1;

-    if (source[i] == wxT('/')) { m_Ending = TRUE; i++; }
-    else m_Ending = FALSE;

 
     // find tag's name and convert it to uppercase:
 
     // find tag's name and convert it to uppercase:

-    while ((i < end_pos) && 
-               ((c = source[i++]) != wxT(' ') && c != wxT('\r') && 
-                 c != wxT('\n') && c != wxT('\t') &&
-                 c != wxT('>'))) 
-       {
-        if ((c >= wxT('a')) && (c <= wxT('z'))) c -= (wxT('a') - wxT('A'));
-        m_Name += c;
+    while ((i < end_pos) &&
+           ((c = source[i++]) != wxT(' ') && c != wxT('\r') &&
+             c != wxT('\n') && c != wxT('\t') &&
+             c != wxT('>')))
+    {
+        if ((c >= wxT('a')) && (c <= wxT('z')))
+            c -= (wxT('a') - wxT('A'));
+        m_Name << c;

     }
 
     // if the tag has parameters, read them and "normalize" them,
     }
 
     // if the tag has parameters, read them and "normalize" them,

-    // i.e. convert to uppercase, replace whitespaces by spaces and 
+    // i.e. convert to uppercase, replace whitespaces by spaces and

     // remove whitespaces around '=':
     if (source[i-1] != wxT('>'))
     // remove whitespaces around '=':
     if (source[i-1] != wxT('>'))

-        while ((i < end_pos) && ((c = source[i++]) != wxT('>'))) 
-           {
-            if ((c >= wxT('a')) && (c <= wxT('z'))) 
-                c -= (wxT('a') - wxT('A'));
-            if (c == wxT('\r') || c == wxT('\n') || c == wxT('\t')) 
-                c = wxT(' '); // make future parsing a bit simpler
-            m_Params += c;
-            if (c == wxT('"')) 
-               {
-                // remove spaces around the '=' character:
-                if (m_Params.Length() > 1 && 
-                    m_Params[m_Params.Length()-2] == wxT(' '))
+    {
+        #define IS_WHITE(c) (c == wxT(' ') || c == wxT('\r') || \
+                             c == wxT('\n') || c == wxT('\t'))
+        wxString pname, pvalue;
+        wxChar quote;
+        enum
+        {
+            ST_BEFORE_NAME = 1,
+            ST_NAME,
+            ST_BEFORE_EQ,
+            ST_BEFORE_VALUE,
+            ST_VALUE
+        } state;
+
+        quote = 0;
+        state = ST_BEFORE_NAME;
+        while (i < end_pos)
+        {
+            c = source[i++];
+
+            if (c == wxT('>') && !(state == ST_VALUE && quote != 0))
+            {
+                if (state == ST_BEFORE_EQ || state == ST_NAME)
+                {
+                    m_ParamNames.Add(pname);
+                    m_ParamValues.Add(wxEmptyString);
+                }
+                else if (state == ST_VALUE && quote == 0)

                 {
                 {

-                    m_Params.RemoveLast();
-                    while (m_Params.Length() > 0 && m_Params.Last() == wxT(' ')) 
-                        m_Params.RemoveLast();
-                    m_Params += wxT('"');
+                    m_ParamNames.Add(pname);
+                    if (entParser)
+                        m_ParamValues.Add(entParser->Parse(pvalue));
+                    else
+                        m_ParamValues.Add(pvalue);

                 }
                 }

-                while ((i < end_pos) && (source[i++] == wxT(' '))) {}
-                if (i < end_pos) i--;
-            
-                // ...and copy the value to m_Params:
-                while ((i < end_pos) && ((c = source[i++]) != wxT('"'))) 
-                    m_Params += c;
-                m_Params += c;
+                break;

             }
             }

-            else if (c == wxT('\'')) 
-               {
-                while ((i < end_pos) && ((c = source[i++]) != wxT('\''))) 
-                    m_Params += c;
-                m_Params += c;
+            switch (state)
+            {
+                case ST_BEFORE_NAME:
+                    if (!IS_WHITE(c))
+                    {
+                        pname = c;
+                        state = ST_NAME;
+                    }
+                    break;
+                case ST_NAME:
+                    if (IS_WHITE(c))
+                        state = ST_BEFORE_EQ;
+                    else if (c == wxT('='))
+                        state = ST_BEFORE_VALUE;
+                    else
+                        pname << c;
+                    break;
+                case ST_BEFORE_EQ:
+                    if (c == wxT('='))
+                        state = ST_BEFORE_VALUE;
+                    else if (!IS_WHITE(c))
+                    {
+                        m_ParamNames.Add(pname);
+                        m_ParamValues.Add(wxEmptyString);
+                        pname = c;
+                        state = ST_NAME;
+                    }
+                    break;
+                case ST_BEFORE_VALUE:
+                    if (!IS_WHITE(c))
+                    {
+                        if (c == wxT('"') || c == wxT('\''))
+                            quote = c, pvalue = wxEmptyString;
+                        else
+                            quote = 0, pvalue = c;
+                        state = ST_VALUE;
+                    }
+                    break;
+                case ST_VALUE:
+                    if ((quote != 0 && c == quote) ||
+                        (quote == 0 && IS_WHITE(c)))
+                    {
+                        m_ParamNames.Add(pname);
+                        if (quote == 0)
+                        {
+                            // VS: backward compatibility, no real reason,
+                            //     but wxHTML code relies on this... :(
+                            pvalue.MakeUpper();
+                        }
+                        if (entParser)
+                            m_ParamValues.Add(entParser->Parse(pvalue));
+                        else
+                            m_ParamValues.Add(pvalue);
+                        state = ST_BEFORE_NAME;
+                    }
+                    else
+                        pvalue << c;
+                    break;

             }
         }
             }
         }

-   m_Begin = i;

 
 

-   cache->QueryTag(pos, &m_End1, &m_End2);
-   if (m_End1 > end_pos) m_End1 = end_pos;
-   if (m_End2 > end_pos) m_End2 = end_pos;
+        #undef IS_WHITE
+    }
+    m_Begin = i;
+
+    cache->QueryTag(pos, &m_End1, &m_End2);
+    if (m_End1 > end_pos) m_End1 = end_pos;
+    if (m_End2 > end_pos) m_End2 = end_pos;

 }
 
 }
 

-    
+wxHtmlTag::~wxHtmlTag()
+{
+    wxHtmlTag *t1, *t2;
+    t1 = m_FirstChild;
+    while (t1)
+    {
+        t2 = t1->GetNextSibling();
+        delete t1;
+        t1 = t2;
+    }
+}

 
 bool wxHtmlTag::HasParam(const wxString& par) const
 {
 
 bool wxHtmlTag::HasParam(const wxString& par) const
 {

-    const wxChar *st = m_Params, *p = par;
-    const wxChar *st2, *p2;
-    const wxChar invalid = wxT(1);
+    return (m_ParamNames.Index(par, false) != wxNOT_FOUND);
+}

 
 

-    if (*st == 0) return FALSE;
-    if (*p == 0) return FALSE;
-    for (st2 = st, p2 = p; ; st2++) 
+wxString wxHtmlTag::GetParam(const wxString& par, bool with_commas) const
+{
+    int index = m_ParamNames.Index(par, false);
+    if (index == wxNOT_FOUND)
+        return wxEmptyString;
+    if (with_commas)

     {
     {

-        if (*p2 == 0) return TRUE;
-        if (*st2 == 0) return FALSE;
-        if (*p2 != *st2) p2 = &invalid;
-        if (*p2 == *st2) p2++;
-        if (*st2 == wxT(' ')) p2 = p;
-        else if (*st2 == wxT('=')) 
-           {
-            p2 = p;
-            while (*st2 != wxT(' ')) 
-               {
-                if (*st2 == wxT('"')) 
-                       {
-                    st2++;
-                    while (*st2 != wxT('"')) st2++;
-                }
-                st2++;
-                if (*st2 == 0) return FALSE;
-            }
-        }
+        // VS: backward compatibility, seems to be never used by wxHTML...
+        wxString s;
+        s << wxT('"') << m_ParamValues[index] << wxT('"');
+        return s;

     }
     }

+    else
+        return m_ParamValues[index];

 }
 
 }
 

+int wxHtmlTag::ScanParam(const wxString& par,
+                         const wxChar *format,
+                         void *param) const
+{
+    wxString parval = GetParam(par);
+    return wxSscanf(parval, format, param);
+}

 
 

+bool wxHtmlTag::GetParamAsColour(const wxString& par, wxColour *clr) const
+{
+    wxASSERT(clr);
+    wxString str = GetParam(par);

 
 

-wxString wxHtmlTag::GetParam(const wxString& par, bool with_commas) const
+    if (clr->Set(str))
+        return true;
+
+    if (!str.empty())
+    {
+        // Handle colours defined in HTML 4.0:
+        #define HTML_COLOUR(name,r,g,b)                 \
+            if (str.IsSameAs(wxT(name), false))         \
+                { *clr = wxColour(r,g,b); return true; }
+        HTML_COLOUR("black",   0x00,0x00,0x00)
+        HTML_COLOUR("silver",  0xC0,0xC0,0xC0)
+        HTML_COLOUR("gray",    0x80,0x80,0x80)
+        HTML_COLOUR("white",   0xFF,0xFF,0xFF)
+        HTML_COLOUR("maroon",  0x80,0x00,0x00)
+        HTML_COLOUR("red",     0xFF,0x00,0x00)
+        HTML_COLOUR("purple",  0x80,0x00,0x80)
+        HTML_COLOUR("fuchsia", 0xFF,0x00,0xFF)
+        HTML_COLOUR("green",   0x00,0x80,0x00)
+        HTML_COLOUR("lime",    0x00,0xFF,0x00)
+        HTML_COLOUR("olive",   0x80,0x80,0x00)
+        HTML_COLOUR("yellow",  0xFF,0xFF,0x00)
+        HTML_COLOUR("navy",    0x00,0x00,0x80)
+        HTML_COLOUR("blue",    0x00,0x00,0xFF)
+        HTML_COLOUR("teal",    0x00,0x80,0x80)
+        HTML_COLOUR("aqua",    0x00,0xFF,0xFF)
+        #undef HTML_COLOUR
+    }
+
+    return false;
+}
+
+bool wxHtmlTag::GetParamAsInt(const wxString& par, int *clr) const

 {
 {

-    const wxChar *st = m_Params, *p = par;
-    const wxChar *st2, *p2;
-    const wxChar invalid = wxT(1);
-    bool comma;
-    wxChar comma_char;
-
-    if (*st == 0) return wxEmptyString;
-    if (*p == 0) return wxEmptyString;
-    for (st2 = st, p2 = p; ; st2++) 
+    if (!HasParam(par)) return false;
+    long i;
+    bool succ = GetParam(par).ToLong(&i);
+    *clr = (int)i;
+    return succ;
+}
+
+wxString wxHtmlTag::GetAllParams() const
+{
+    // VS: this function is for backward compatibility only,
+    //     never used by wxHTML
+    wxString s;
+    size_t cnt = m_ParamNames.GetCount();
+    for (size_t i = 0; i < cnt; i++)

     {
     {

-        if (*p2 == 0)  // found
-           {
-            wxString fnd = wxEmptyString;
-            st2++; // '=' character
-            comma = FALSE;
-           comma_char = wxT('\0');
-            if (!with_commas && (*(st2) == wxT('"'))) 
-               {
-               st2++;
-                       comma = TRUE; 
-                       comma_char = wxT('"');
-               }
-           else if (!with_commas && (*(st2) == wxT('\''))) 
-               {
-               st2++; 
-               comma = TRUE;
-                       comma_char = wxT('\'');
-           }
-           
-            while (*st2 != 0) 
-               {
-                if (comma && *st2 == comma_char) comma = FALSE;
-                else if ((*st2 == wxT(' ')) && (!comma)) break;
-                fnd += (*(st2++));
-            }
-            if (!with_commas && (*(st2-1) == comma_char)) fnd.RemoveLast();
-            return fnd;
-        }
-        if (*st2 == 0) return wxEmptyString;
-        if (*p2 != *st2) p2 = &invalid;
-        if (*p2 == *st2) p2++;
-        if (*st2 == wxT(' ')) p2 = p;
-        else if (*st2 == wxT('=')) 
-           {
-            p2 = p;
-            while (*st2 != wxT(' ')) 
-               {
-                if (*st2 == wxT('"')) 
-                       {
-                    st2++;
-                    while (*st2 != wxT('"')) st2++;
-                }
-                else if (*st2 == wxT('\''))
-                       {
-                    st2++;
-                    while (*st2 != wxT('\'')) st2++;
-                }
-                st2++;
-            }
-        }
+        s << m_ParamNames[i];
+        s << wxT('=');
+        if (m_ParamValues[i].Find(wxT('"')) != wxNOT_FOUND)
+            s << wxT('\'') << m_ParamValues[i] << wxT('\'');
+        else
+            s << wxT('"') << m_ParamValues[i] << wxT('"');

     }
     }

+    return s;

 }
 
 }
 

+wxHtmlTag *wxHtmlTag::GetFirstSibling() const
+{
+    if (m_Parent)
+        return m_Parent->m_FirstChild;
+    else
+    {
+        wxHtmlTag *cur = (wxHtmlTag*)this;
+        while (cur->m_Prev)
+            cur = cur->m_Prev;
+        return cur;
+    }
+}

 
 

+wxHtmlTag *wxHtmlTag::GetLastSibling() const
+{
+    if (m_Parent)
+        return m_Parent->m_LastChild;
+    else
+    {
+        wxHtmlTag *cur = (wxHtmlTag*)this;
+        while (cur->m_Next)
+            cur = cur->m_Next;
+        return cur;
+    }
+}

 
 

-int wxHtmlTag::ScanParam(const wxString& par, wxChar *format, void *param) const
+wxHtmlTag *wxHtmlTag::GetNextTag() const

 {
 {

-    wxString parval = GetParam(par);
-    return wxSscanf((const wxChar*)parval, format, param);
+    if (m_FirstChild) return m_FirstChild;
+    if (m_Next) return m_Next;
+    wxHtmlTag *cur = m_Parent;
+    if (!cur) return NULL;
+    while (cur->m_Parent && !cur->m_Next)
+        cur = cur->m_Parent;
+    return cur->m_Next;

 }
 
 #endif
 }
 
 #endif