public AttributeLiteralToken With(string unescapedValue = null, AttributeLiteralKind?literalKind = null)
{
unescapedValue = unescapedValue ?? UnescapedValue;
if ((literalKind == null || literalKind != LiteralKind) && unescapedValue == UnescapedValue)
{
return(this);
}
switch (literalKind ?? LiteralKind)
{
case AttributeLiteralKind.DoubleQuoted:
case AttributeLiteralKind.Invalid:
return(new AttributeLiteralToken(
LeadingTrivia,
string.Format("\"{0}\"", UxTextEncoding.EncodeAttribute(unescapedValue, '"')),
TrailingTrivia,
AttributeLiteralKind.DoubleQuoted,
unescapedValue));
case AttributeLiteralKind.SingleQuoted:
return(new AttributeLiteralToken(
LeadingTrivia,
string.Format("'{0}'", UxTextEncoding.EncodeAttribute(unescapedValue, '\'')),
TrailingTrivia,
AttributeLiteralKind.SingleQuoted,
unescapedValue));
case AttributeLiteralKind.Unquoted:
if (SyntaxParser.IsValidUnquotedAttributeValue(unescapedValue))
{
return(new AttributeLiteralToken(
LeadingTrivia,
unescapedValue,
TrailingTrivia,
AttributeLiteralKind.Unquoted,
unescapedValue));
}
return(new AttributeLiteralToken(
LeadingTrivia,
UxTextEncoding.EncodeAttribute(unescapedValue, '"'),
TrailingTrivia,
AttributeLiteralKind.DoubleQuoted,
unescapedValue));
default:
throw new NotSupportedException("Attribute kind is unknown, don't know how to handle.");
}
}
static AttributeLiteralKind GetLiteralKind(string escapedValue)
{
var len = escapedValue.Length;
if (len > 1)
{
var quote = escapedValue[0];
if (quote == '\"' || quote == '\'')
{
// Should find _one_ quote of same type at end of string
if (escapedValue.IndexOf(quote, 1) != len - 1)
{
return(AttributeLiteralKind.Invalid);
}
return(quote == '\'' ? AttributeLiteralKind.SingleQuoted : AttributeLiteralKind.DoubleQuoted);
}
}
return(SyntaxParser.IsValidUnquotedAttributeValue(escapedValue)
? AttributeLiteralKind.Unquoted
: AttributeLiteralKind.Invalid);
}
