private void ParseXmlEndTag(XmlElement xmlElement)
{
// XmlEndTag -> "<" "/" XmlName ">".
if (_scanner.EOF)
{
return;
}
MatchToken(TokenType.XmlTagStart);
MatchToken(TokenType.XmlForwardSlash);
//TODO use ParseXmlName instead of just getting the image
if (CurrentTokenType == TokenType.XmlTagName)
{
if (xmlElement.Name != _scanner.CurrentToken.Image)
{
AddError("Mismatched element start and end tags");
}
_scanner.GetToken();
}
if (CurrentTokenType == TokenType.XmlTagEnd)
{
xmlElement.Position.End = GetCurrentTokenPosition();
xmlElement.EndTagPosition = GetCurrentTokenPosition();
xmlElement.IsComplete = true;
_scanner.GetToken();
}
else
{
AddError("Expected '>'");
}
}
private void ParseXmlRestElement(XmlElement xmlElement)
{
// XmlRestElement -> "/" ">"
// -> ">" { Content } XmlEndTag.
if (CurrentTokenType == TokenType.XmlForwardSlash)
{
xmlElement.IsSelfClosing = true;
MatchToken(TokenType.XmlForwardSlash);
if (CurrentTokenType == TokenType.XmlTagEnd)
{
xmlElement.Position.End = GetCurrentTokenPosition();
xmlElement.IsComplete = true;
_scanner.GetToken();
}
}
else if (CurrentTokenType == TokenType.XmlTagEnd)
{
MatchToken(TokenType.XmlTagEnd);
xmlElement.Position.End = GetCurrentTokenPosition();
while (!(CurrentTokenType == TokenType.XmlTagStart &&
_scanner.PeekToken(1) != null && _scanner.PeekToken(1).Type == TokenType.XmlForwardSlash))
{
List<AstNode> content = ParseContent();
xmlElement.Content.AddRange(content);
// Set the parent property on the XmlElement
foreach (AstNode astNode in content)
{
if (astNode is XmlElement)
{
((XmlElement)astNode).Parent = xmlElement;
}
}
//TODO write some comments
if (content.Count == 0 && !_scanner.EOF)
{
AddError("The parser has been pre-emptively terminated because it appears " +
"as if the parser is stuck. [In ParseXmlRestElement()]");
break;
}
if (_scanner.EOF)
{
AddError(string.Format("Expected closing tag for opening tag '{0}'.", xmlElement.Name));
break;
}
}
ParseXmlEndTag(xmlElement);
}
else
{
AddError("Expected end of XML element");
}
}
private XmlElement ParseXmlElement()
{
// XmlElement -> "<" XmlName { XmlAttribute | NVStatement } XmlRestElement.
Position startPos = GetCurrentTokenPosition();
MatchToken(TokenType.XmlTagStart);
string elementName;
if (CurrentTokenType == TokenType.XmlTagName)
{
elementName = _scanner.CurrentToken.Image;
_scanner.GetToken();
}
else
{
AddError("Expected XML tag name.");
XmlElement emptyXmlElement = new XmlElement("");
emptyXmlElement.Position = startPos;
// Consume TokenType.XmlAttributeMemberSelect tokens because these separate this partial element and the next node
while (CurrentTokenType == TokenType.XmlAttributeMemberSelect)
{
_scanner.GetToken();
}
return emptyXmlElement;
}
XmlElement xmlElement = new XmlElement(elementName);
startPos.End = GetCurrentTokenPosition();
xmlElement.Position = startPos;
if (CurrentTokenIn(TokenType.NVDirectiveHash, TokenType.NVDollar))
{
AstNode statement = ParseNVStatement();
if (statement != null)
{
xmlElement.Attributes.Add(statement);
}
}
// Consume TokenType.XmlAttributeMemberSelect tokens
while (CurrentTokenType == TokenType.XmlAttributeMemberSelect)
{
// Do this before getting the next token because the next token may not belong to this XML element
xmlElement.Position.End = GetCurrentTokenPosition().Start;
_scanner.GetToken();
}
while (CurrentTokenType == TokenType.XmlAttributeName)
{
XmlAttribute xmlAttribute = ParseXmlAttribute();
if (xmlAttribute != null)
{
//TODO xmlAttribute.Position = GetCurrentTokenPosition();
xmlElement.Attributes.Add(xmlAttribute);
}
else if (!_scanner.EOF)
{
//TODO write some comments
AddError("The parser has been pre-emptively terminated because it appears " +
"as if the parser is stuck. [In ParseXmlElement()]");
break;
}
xmlElement.Position.End = GetCurrentTokenPosition().Start;
// Consume TokenType.XmlAttributeMemberSelect tokens
while (CurrentTokenType == TokenType.XmlAttributeMemberSelect)
{
// Do this before getting the next token because the next token may not belong to this XML element
xmlElement.Position.End = GetCurrentTokenPosition().Start;
_scanner.GetToken();
}
}
if (_scanner.EOF)
{
// Include the characters right to the end
xmlElement.Position.End = GetCurrentTokenPosition();
}
ParseXmlRestElement(xmlElement);
return xmlElement;
}