wxString wxHtmlEntitiesParser::Parse(const wxString& input) const
{
wxString output;
const wxString::const_iterator end(input.end());
wxString::const_iterator c(input.begin());
wxString::const_iterator last(c);
for ( ; c < end; ++c )
{
if (*c == wxT('&'))
{
if ( output.empty() )
output.reserve(input.length());
if (c - last > 0)
output.append(last, c);
if ( ++c == end )
break;
wxString entity;
const wxString::const_iterator ent_s = c;
wxChar entity_char;
for ( ; c != end; ++c )
{
wxChar ch = *c;
if ( !((ch >= wxT('a') && ch <= wxT('z')) ||
(ch >= wxT('A') && ch <= wxT('Z')) ||
(ch >= wxT('0') && ch <= wxT('9')) ||
ch == wxT('_') || ch == wxT('#')) )
break;
}
entity.append(ent_s, c);
if (c == end || *c != wxT(';')) --c;
last = c+1;
entity_char = GetEntityChar(entity);
if (entity_char)
output << entity_char;
else
{
output.append(ent_s-1, c+1);
wxLogTrace(wxTRACE_HTML_DEBUG,
"Unrecognized HTML entity: '%s'",
entity);
}
}
}
if ( last == input.begin() ) // common case: no entity
return input;
if ( last != end )
output.append(last, end);
return output;
}
wxString wx28HtmlEntitiesParser::Parse(const wxString& input)
{
const wxChar *c, *last;
const wxChar *in_str = input.c_str();
wxString output;
for (c = in_str, last = in_str; *c != wxT('\0'); c++)
{
if (*c == wxT('&'))
{
if ( output.empty() )
output.reserve(input.length());
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);
wxLogTrace(wxTRACE_HTML_DEBUG,
wxT("Unrecognized HTML entity: '%s'"),
entity.c_str());
}
}
}
if (last == in_str) // common case: no entity
return input;
if (*last != wxT('\0'))
output.append(last);
return output;
}
void Decode(std::wstring& str, int opt)
{
// (opt <= 0 || opt > 3) : Do nothing.
// (opt == 1) : Decode both numeric character references and character entity references.
// (opt == 2) : Decode only numeric character references.
// (opt == 3) : Decode only character entity references.
if (opt >= 1 && opt <= 3)
{
std::wstring::size_type start = 0;
while ((start = str.find(L'&', start)) != std::wstring::npos)
{
std::wstring::size_type end, pos;
if ((end = str.find(L';', start)) == std::wstring::npos) break;
pos = start + 1;
if (pos == end) // &; - skip
{
start = end + 1;
continue;
}
else if ((end - pos) > 10) // name (or number) is too long
{
++start;
continue;
}
if (str[pos] == L'#') // Numeric character reference
{
if (opt == 3 || // Decode only character entity references,
++pos == end) // &#; - skip
{
start = end + 1;
continue;
}
int base;
if (str[pos] == L'x' || str[pos] == L'X')
{
if (++pos == end) // &#x; or &#X; - skip
{
start = end + 1;
continue;
}
base = 16;
}
else
{
base = 10;
}
std::wstring num(str, pos, end - pos);
WCHAR* pch = nullptr;
errno = 0;
long ch = wcstol(num.c_str(), &pch, base);
if (pch == nullptr || *pch != L'\0' || errno == ERANGE || ch <= 0 || ch >= 0xFFFE) // invalid character
{
start = pos;
continue;
}
str.replace(start, end - start + 1, 1, (WCHAR)ch);
++start;
}
else // Character entity reference
{
if (opt == 2) // Decode only numeric character references - skip
{
start = end + 1;
continue;
}
std::wstring name(str, pos, end - pos);
WCHAR ch = GetEntityChar(name);
if (ch)
{
str.replace(start, end - start + 1, 1, ch);
}
++start;
}
}
}
}
