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new HTML tags parser and entities substitution code

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10744 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Václav Slavík
2001-07-01 15:09:35 +00:00
parent ec7c3e898a
commit daa616fca0
6 changed files with 619 additions and 479 deletions
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266
src/html/htmltag.cpp
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@@ -26,6 +26,7 @@
#endif
#include "wx/html/htmltag.h"
#include "wx/html/htmlpars.h"
#include <stdio.h> // for vsscanf
#include <stdarg.h>
@@ -121,15 +122,17 @@ wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
}
}
void wxHtmlTagsCache::QueryTag(int at, int* end1, int* end2)
{
if (m_Cache == NULL) return;
if (m_Cache[m_CachePos].Key != at)
{
int delta = (at < m_Cache[m_CachePos].Key) ? -1 : 1;
do {m_CachePos += delta;} while (m_Cache[m_CachePos].Key != at);
do
{
m_CachePos += delta;
}
while (m_Cache[m_CachePos].Key != at);
}
*end1 = m_Cache[m_CachePos].End1;
*end2 = m_Cache[m_CachePos].End2;
@@ -144,64 +147,129 @@ void wxHtmlTagsCache::QueryTag(int at, int* end1, int* end2)
IMPLEMENT_CLASS(wxHtmlTag,wxObject)
wxHtmlTag::wxHtmlTag(const wxString& source, int pos, int end_pos, wxHtmlTagsCache* cache) : wxObject()
wxHtmlTag::wxHtmlTag(const wxString& source, int pos, int end_pos,
wxHtmlTagsCache *cache,
wxHtmlEntitiesParser *entParser) : wxObject()
{
int i;
char c;
wxChar c;
// fill-in name, params and begin pos:
m_Name = m_Params = wxEmptyString;
i = pos+1;
if (source[i] == wxT('/')) { m_Ending = TRUE; i++; }
else m_Ending = FALSE;
if (source[i] == wxT('/'))
{ m_Ending = TRUE; i++; }
else
m_Ending = FALSE;
// 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('>')))
((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 ((c >= wxT('a')) && (c <= wxT('z')))
c -= (wxT('a') - wxT('A'));
m_Name << c;
}
// if the tag has parameters, read them and "normalize" them,
// i.e. convert to uppercase, replace whitespaces by spaces and
// remove whitespaces around '=':
if (source[i-1] != wxT('>'))
while ((i < end_pos) && ((c = source[i++]) != wxT('>')))
{
#define IS_WHITE(c) (c == wxT(' ') || c == wxT('\r') || \
c == wxT('\n') || c == wxT('\t'))
wxString pname, pvalue;
wxChar quote;
enum
{
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('"'))
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))
{
// remove spaces around the '=' character:
if (m_Params.Length() > 1 &&
m_Params[m_Params.Length()-2] == wxT(' '))
if (state == ST_BEFORE_EQ || state == ST_NAME)
{
m_Params.RemoveLast();
while (m_Params.Length() > 0 && m_Params.Last() == wxT(' '))
m_Params.RemoveLast();
m_Params += wxT('"');
m_ParamNames.Add(pname);
m_ParamValues.Add(wxEmptyString);
}
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;
else if (state == ST_VALUE && quote == 0)
{
m_ParamNames.Add(pname);
m_ParamValues.Add(entParser->Parse(pvalue));
}
break;
}
else if (c == wxT('\''))
switch (state)
{
while ((i < end_pos) && ((c = source[i++]) != wxT('\'')))
m_Params += c;
m_Params += c;
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();
}
m_ParamValues.Add(entParser->Parse(pvalue));
state = ST_BEFORE_NAME;
}
else
pvalue << c;
break;
}
}
#undef IS_WHITE
}
m_Begin = i;
cache->QueryTag(pos, &m_End1, &m_End2);
@@ -209,113 +277,49 @@ wxHtmlTag::wxHtmlTag(const wxString& source, int pos, int end_pos, wxHtmlTagsCac
if (m_End2 > end_pos) m_End2 = end_pos;
}
bool wxHtmlTag::HasParam(const wxString& par) const
{
const wxChar *st = m_Params, *p = par;
const wxChar *st2, *p2;
const wxChar invalid = wxT('\1');
if (*st == 0) return FALSE;
if (*p == 0) return FALSE;
for (st2 = st, p2 = p; ; st2++)
{
if (*p2 == 0 && *st2 == wxT('=')) 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;
}
}
}
return (m_ParamNames.Index(par, FALSE) != wxNOT_FOUND);
}
wxString wxHtmlTag::GetParam(const wxString& par, bool with_commas) 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++)
int index = m_ParamNames.Index(par, FALSE);
if (index == wxNOT_FOUND)
return wxEmptyString;
if (with_commas)
{
if (*p2 == 0 && *st2 == wxT('=')) // 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++;
}
}
// 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, wxChar *format, void *param) const
{
wxString parval = GetParam(par);
return wxSscanf(parval, format, param);
}
wxString wxHtmlTag::GetAllParams() const
{
// VS: this function is for backward compatiblity only,
// never used by wxHTML
wxString s;
size_t cnt = m_ParamNames.GetCount();
for (size_t i = 0; i < cnt; i++)
{
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;
}
#endif