void FlushExisingBuffer(int lastFlushAtIndex, XmlLexerEvent lexerEvent)
{
//raise lexer event
if (_appendCount > 0)
{
#if DEBUG
//Console.WriteLine(lexerEvent.ToString() + " : " +
// new string(this.textSnapshot.Copy(this._firstAppendAt, (this._readIndex - this._firstAppendAt) + 1)));
#endif
RaiseStateChanged(lexerEvent, this._firstAppendAt, (this._readIndex - this._firstAppendAt) + 1);
}
this._lastFlushAt = lastFlushAtIndex;
this._appendCount = 0;
}
private void MyXmlLexer_LexStateChanged(XmlLexerEvent lexEvent, int startIndex, int len)
{
switch (lexEvent)
{
default:
{
throw new NotSupportedException();
}
case XmlLexerEvent.VisitOpenAngle:
{
//enter new context
}
break;
case XmlLexerEvent.CommentContent:
{
}
break;
case XmlLexerEvent.NamePrefix:
{
//name prefix of
#if DEBUG
string testStr = _textSnapshot.Substring(startIndex, len);
#endif
switch (_parseState)
{
default:
throw new NotSupportedException();
case 0:
_nodeNamePrefix = new TextSpan(startIndex, len);
_hasNodeNamePrefix = true;
break;
case 1:
//attribute part
_attrPrefix = new TextSpan(startIndex, len);
_hasAttrPrefix = true;
break;
case 2: // </a
_nodeNamePrefix = new TextSpan(startIndex, len);
_hasNodeNamePrefix = true;
break;
}
}
break;
case XmlLexerEvent.FromContentPart:
{
//text content of the element
OnTextNode(new TextSpan(startIndex, len));
}
break;
case XmlLexerEvent.AttributeValueAsLiteralString:
{
//assign value and add to parent
//string attrValue = textSnapshot.Substring(startIndex, len);
if (_parseState == 11)
{
//doctype node
//add to its parameter
}
else
{
//add value to current attribute node
_parseState = 1;
OnAttribute(_attrName, new TextSpan(startIndex, len));
}
}
break;
case XmlLexerEvent.Attribute:
{
//create attribute node and wait for its value
_attrName = new TextSpan(startIndex, len);
//string attrName = textSnapshot.Substring(startIndex, len);
}
break;
case XmlLexerEvent.NodeNameOrAttribute:
{
//the lexer dose not store state of element name or attribute name
//so we use parseState to decide here
string name = _textSnapshot.Substring(startIndex, len);
switch (_parseState)
{
case 0:
{
//element name=> create element
if (_currentNodeName != null)
{
OnEnteringElementBody();
_openEltStack.Push(_currentNodeName);
}
_currentNodeName = name;
//enter new node
OnVisitNewElement(new TextSpan(startIndex, len));
_parseState = 1; //enter attribute
_waitingAttrName = null;
}
break;
case 1:
{
//wait for attr value
if (_waitingAttrName != null)
{
//push waiting attr
//create new attribute
//eg. in html
//but this is not valid in Xml
throw new NotSupportedException();
}
_waitingAttrName = name;
}
break;
case 2:
{
//****
//node name after open slash </
//TODO: review here,avoid direct string comparison
if (_currentNodeName == name)
{
OnExitingElementBody();
if (_openEltStack.Count > 0)
{
_waitingAttrName = null;
_currentNodeName = _openEltStack.Pop();
}
_parseState = 3;
}
else
{
//eg. in html
//but this is not valid in Xml
//not match open-close tag
throw new NotSupportedException();
}
}
break;
case 4:
{
//attribute value as id ***
//eg. in Html, but not for general Xml
throw new NotSupportedException();
}
case 10:
{
//eg <!
_parseState = 11;
}
break;
case 11:
{
//comment node
}
break;
default:
{
}
break;
}
}
break;
case XmlLexerEvent.VisitCloseAngle:
{
//close angle of current new node
//enter into its content
if (_parseState == 11)
{
//add doctype to html
}
else
{
}
_waitingAttrName = null;
_parseState = 0;
}
break;
case XmlLexerEvent.VisitAttrAssign:
{
_parseState = 4;
}
break;
case XmlLexerEvent.VisitOpenSlashAngle:
{
_parseState = 2;
}
break;
case XmlLexerEvent.VisitCloseSlashAngle:
{
// />
if (_openEltStack.Count > 0)
{
OnExitingElementBody();
//curTextNode = null;
//curAttr = null;
_waitingAttrName = null;
_currentNodeName = _openEltStack.Pop();
}
_parseState = 0;
}
break;
case XmlLexerEvent.VisitOpenAngleExclimation:
{
_parseState = 10;
}
break;
}
}
protected void RaiseStateChanged(XmlLexerEvent lexEvent, int startIndex, int len)
{
LexStateChanged(lexEvent, startIndex, len);
}
