public override State PushChar(char c, IParseContext context, ref string rollback)
{
XAttribute att = context.Nodes.Peek() as XAttribute;
if (c == '<')
{
//parent handles message
if (att != null)
{
context.Nodes.Pop();
}
rollback = string.Empty;
return(Parent);
}
//state has just been entered
if (context.CurrentStateLength == 1)
{
if (context.PreviousState is XmlNameState)
{
Debug.Assert(att.IsNamed);
context.StateTag = GETTINGEQ;
}
else if (context.PreviousState is XmlAttributeValueState)
{
//Got value, so end attribute
context.Nodes.Pop();
att.End(context.LocationMinus(1));
IAttributedXObject element = (IAttributedXObject)context.Nodes.Peek();
element.Attributes.AddAttribute(att);
rollback = string.Empty;
return(Parent);
}
else
{
//starting a new attribute
Debug.Assert(att == null);
Debug.Assert(context.StateTag == NAMING);
att = new XAttribute(context.LocationMinus(1));
context.Nodes.Push(att);
rollback = string.Empty;
return(XmlNameState);
}
}
if (c == '>')
{
context.LogWarning("Attribute ended unexpectedly with '>' character.");
if (att != null)
{
context.Nodes.Pop();
}
rollback = string.Empty;
return(Parent);
}
if (context.StateTag == GETTINGEQ)
{
if (char.IsWhiteSpace(c))
{
return(null);
}
else if (c == '=')
{
context.StateTag = GETTINGVAL;
return(null);
}
}
else if (context.StateTag == GETTINGVAL)
{
if (char.IsWhiteSpace(c))
{
return(null);
}
else if (c == '"')
{
return(DoubleQuotedAttributeValueState);
}
else if (c == '\'')
{
return(SingleQuotedAttributeValueState);
}
else if (char.IsLetterOrDigit(c))
{
rollback = string.Empty;
return(UnquotedAttributeValueState);
}
}
if (char.IsLetterOrDigit(c) || char.IsPunctuation(c) || char.IsWhiteSpace(c))
{
if (context.StateTag == GETTINGEQ)
{
context.LogError("Expecting = in attribute, got " + c + ".");
}
else if (context.StateTag == GETTINGVAL)
{
context.LogError("Expecting attribute value, got " + c + ".");
}
else
{
context.LogError("Unexpected character '" + c + "' in attribute.");
}
if (att != null)
{
context.Nodes.Pop();
}
rollback = string.Empty;
return(Parent);
}
rollback = string.Empty;
return(Parent);
}
public override State PushChar(char c, IParseContext context, ref string rollback)
{
XAttribute att = context.Nodes.Peek() as XAttribute;
//state has just been entered
if (context.CurrentStateLength == 1)
{
if (context.PreviousState is XmlNameState)
{
//error parsing name
if (!att.IsNamed)
{
context.Nodes.Pop();
rollback = string.Empty;
return(Parent);
}
context.StateTag = GETTINGEQ;
}
else if (context.PreviousState is XmlAttributeValueState)
{
//Got value, so end attribute
context.Nodes.Pop();
att.End(context.LocationMinus(1));
IAttributedXObject element = (IAttributedXObject)context.Nodes.Peek();
element.Attributes.AddAttribute(att);
rollback = string.Empty;
return(Parent);
}
else
{
//starting a new attribute
Debug.Assert(att == null);
Debug.Assert(context.StateTag == NAMING);
att = new XAttribute(context.LocationMinus(1));
context.Nodes.Push(att);
rollback = string.Empty;
return(XmlNameState);
}
}
if (context.StateTag == GETTINGEQ)
{
if (char.IsWhiteSpace(c))
{
return(null);
}
if (c == '=')
{
context.StateTag = GETTINGVAL;
return(null);
}
context.LogError("Expecting = in attribute, got '" + c + "'.");
}
else if (context.StateTag == GETTINGVAL)
{
if (char.IsWhiteSpace(c))
{
return(null);
}
rollback = string.Empty;
return(AttributeValueState);
}
else if (c != '<')
{
//parent handles message for '<'
context.LogError("Unexpected character '" + c + "' in attribute.");
}
if (att != null)
{
context.Nodes.Pop();
}
rollback = string.Empty;
return(Parent);
}