private void StartTag(byte[] buf, int offset,
ContentToken ct, Tokens tok)
{
depth++;
int colon;
string name;
string prefix;
var attributes = new Dictionary <string, string>();
nsStack.Push();
// if i have attributes
if ((tok == Tokens.StartTagWithAtts) ||
(tok == Tokens.EmptyElementWithAtts))
{
int start;
int end;
string val;
for (int i = 0; i < ct.GetAttributeSpecifiedCount(); i++)
{
start = ct.GetAttributeNameStart(i);
end = ct.GetAttributeNameEnd(i);
name = utf.GetString(buf, start, end - start);
start = ct.GetAttributeValueStart(i);
end = ct.GetAttributeValueEnd(i);
//val = _utf.GetString(buf, start, end - start);
val = NormalizeAttributeValue(buf, start, end - start);
// <foo b='&'/>
// <foo b='&amp;'
// TODO: if val includes &, it gets double-escaped
if (name.StartsWith("xmlns:"))
{
// prefixed namespace declaration
colon = name.IndexOf(':');
prefix = name.Substring(colon + 1);
nsStack.AddNamespace(prefix, val);
attributes.Add(name, val);
}
else if (name == "xmlns")
{
// namespace declaration
nsStack.AddNamespace(string.Empty, val);
attributes.Add(name, val);
}
else
{
// normal attribute
attributes.Add(name, val);
}
}
}
name = utf.GetString(buf,
offset + utf8Encoding.MinBytesPerChar,
ct.NameEnd - offset - utf8Encoding.MinBytesPerChar);
colon = name.IndexOf(':');
string ns;
prefix = null;
if (colon > 0)
{
prefix = name.Substring(0, colon);
name = name.Substring(colon + 1);
ns = nsStack.LookupNamespace(prefix);
}
else
{
ns = nsStack.DefaultNamespace;
}
XmppXElement newel = Factory.GetElement(prefix, name, ns);
foreach (string attrname in attributes.Keys)
{
colon = attrname.IndexOf(':');
if (colon > 0)
{
prefix = attrname.Substring(0, colon);
name = attrname.Substring(colon + 1);
ns = nsStack.LookupNamespace(prefix);
if (attrname.StartsWith("xmlns:"))
{
// Namespace Declaration
newel.SetAttributeValue(XName.Get(name, ns), attributes[attrname]);
}
else
{
// prefixed attribute
newel.SetAttributeValue("{" + ns + "}" + name, attributes[attrname]);
}
}
else
{
newel.SetAttributeValue(XName.Get(attrname, string.Empty), attributes[attrname]);
}
}
if (root == null)
{
root = newel;
OnStreamStart?.Invoke(root);
}
else
{
current?.Add(newel);
current = newel;
}
}