protected override void ShallowCopyFrom(XObject copyFrom)
{
base.ShallowCopyFrom(copyFrom);
XClosingTag copyFromAtt = (XClosingTag)copyFrom;
//immutable types
name = copyFromAtt.name;
}
public override State PushChar(char c, IParseContext context, ref string rollback)
{
XClosingTag ct = context.Nodes.Peek() as XClosingTag;
if (ct == null)
{
Debug.Assert(context.CurrentStateLength == 1,
"IncompleteNode must not be an XClosingTag when CurrentStateLength is 1");
Debug.Assert(context.Nodes.Peek() is XElement);
ct = new XClosingTag(context.LocationMinus(3)); //3 = </ and the current char
context.Nodes.Push(ct);
}
//if tag closed
if (c == '>')
{
context.Nodes.Pop();
if (ct.IsNamed)
{
ct.End(context.Location);
// walk up tree of parents looking for matching tag
int popCount = 0;
bool found = false;
foreach (XObject node in context.Nodes)
{
popCount++;
XElement element = node as XElement;
if (element != null && element.Name == ct.Name)
{
found = true;
break;
}
}
if (!found)
{
popCount = 0;
}
//clear the stack of intermediate unclosed tags
while (popCount > 1)
{
XElement el = context.Nodes.Pop() as XElement;
if (el != null)
{
context.LogError(string.Format(
"Unclosed tag '{0}' at line {1}, column {2}.", el.Name.FullName, el.Region.BeginLine, el.Region.BeginColumn),
ct.Region);
}
popCount--;
}
//close the start tag, if we found it
if (popCount > 0)
{
if (context.BuildTree)
{
((XElement)context.Nodes.Pop()).Close(ct);
}
else
{
context.Nodes.Pop();
}
}
else
{
context.LogError(
"Closing tag '" + ct.Name.FullName + "' does not match any currently open tag.");
}
}
else
{
context.LogError("Closing tag ended prematurely.");
}
return(Parent);
}
if (c == '<')
{
context.LogError("Unexpected '<' in tag.");
rollback = string.Empty;
return(Parent);
}
if (!ct.IsNamed && (char.IsLetter(c) || c == '_'))
{
rollback = string.Empty;
return(NameState);
}
rollback = string.Empty;
//note: MalformedTagState logs an error, so skip this
//context.LogError ("Unexpected character '" + c + "' in closing tag.");
return(MalformedTagState);
}