private TypeSelector ParseTypeSelector()
{
TypeSelector selector = null;
SelectorNamespacePrefix prefix = ParseNamespacePrefix();
if (CurrentToken != null && CurrentToken.TokenType == SelectorTokenType.Ident)
{
selector = new TypeSelector(CurrentToken.Text, prefix);
currentPosition++;
}
return(selector);
}
private TypeSelector ParseUniversalSelector()
{
TypeSelector selector = null;
SelectorNamespacePrefix prefix = ParseNamespacePrefix();
if (CurrentToken != null && CurrentToken.Text == "*")
{
selector = new UniversalSelector(prefix);
currentPosition++;
}
return(selector);
}
private SelectorNamespacePrefix ParseNamespacePrefix()
{
SelectorNamespacePrefix prefix = null;
if (CurrentToken != null)
{
if (CurrentToken.TokenType == SelectorTokenType.Ident)
{
string ident = CurrentToken.Text;
currentPosition++;
if (CurrentToken == null)
{
currentPosition--;
}
else if (CurrentToken.Text == "|")
{
prefix = new SelectorNamespacePrefix(ident);
currentPosition++;
}
else
{
currentPosition--;
}
}
else if (CurrentToken.Text == "*")
{
currentPosition++;
if (CurrentToken == null)
{
currentPosition--;
}
else if (CurrentToken.Text == "|")
{
prefix = new SelectorNamespacePrefix("*");
currentPosition++;
}
else
{
currentPosition--;
}
}
else if (CurrentToken.Text == "|")
{
//TODO: is this supposed to mean universal selector?
prefix = new SelectorNamespacePrefix("");
currentPosition++;
}
}
return(prefix);
}
private SelectorNamespacePrefix ParseNamespacePrefix()
{
SelectorNamespacePrefix prefix = null;
if (CurrentToken != null)
{
if (CurrentToken.TokenType == SelectorTokenType.Ident)
{
string ident = CurrentToken.Text;
currentPosition++;
if (CurrentToken == null)
{
currentPosition--;
}
else if (CurrentToken.Text == "|")
{
prefix = new SelectorNamespacePrefix(ident);
currentPosition++;
}
else
{
currentPosition--;
}
}
else if (CurrentToken.Text == "*")
{
currentPosition++;
if (CurrentToken == null)
{
currentPosition--;
}
else if (CurrentToken.Text == "|")
{
prefix = new SelectorNamespacePrefix("*");
currentPosition++;
}
else
{
currentPosition--;
}
}
else if (CurrentToken.Text == "|")
{
//TODO: is this supposed to mean universal selector?
prefix = new SelectorNamespacePrefix("");
currentPosition++;
}
}
return prefix;
}
public TypeSelector(string name, SelectorNamespacePrefix prefix)
: this(name)
{
this.Namespace = prefix;
}
public UniversalSelector(SelectorNamespacePrefix prefix)
: base("*", prefix)
{
}
private IFilter ParseAttributeFilter()
{
IFilter selector = null;
if (CurrentToken.Text == "[")
{
currentPosition++;
SkipWhiteSpace();
SelectorNamespacePrefix ns = ParseNamespacePrefix();
string attributeType = Consume(SelectorTokenType.Ident);
SkipWhiteSpace();
var filterLookup = new Dictionary <SelectorToken, Func <string, IFilter> >()
{
{ new SelectorToken(SelectorTokenType.PrefixMatch, "^="),
text => new AttributePrefixFilter(attributeType, text) },
{ new SelectorToken(SelectorTokenType.SuffixMatch, "$="),
text => new AttributeSuffixFilter(attributeType, text) },
{ new SelectorToken(SelectorTokenType.SubstringMatch, "*="),
text => new AttributeSubstringFilter(attributeType, text) },
{ new SelectorToken(SelectorTokenType.Text, "="),
text => new AttributeExactFilter(attributeType, text) },
{ new SelectorToken(SelectorTokenType.Includes, "~="),
text => new AttributeIncludesFilter(attributeType, text) },
{ new SelectorToken(SelectorTokenType.DashMatch, "|="),
text => new AttributeDashFilter(attributeType, text) }
};
if (filterLookup.ContainsKey(CurrentToken))
{
SelectorToken token = CurrentToken;
currentPosition++;
SkipWhiteSpace();
if (CurrentToken.TokenType == SelectorTokenType.Ident)
{
selector = filterLookup[token](CurrentToken.Text);
}
else if (CurrentToken.TokenType == SelectorTokenType.String)
{
selector = filterLookup[token](CurrentToken.Text.Substring(1, CurrentToken.Text.Length - 2));
}
else
{
ParseError("Unexpected token type for attribute matcher");
}
currentPosition++;
SkipWhiteSpace();
}
else
{
Expect("]");
}
if (CurrentToken.Text == "]" && selector == null)
{
selector = new AttributeFilter(attributeType);
currentPosition++;
}
else if (CurrentToken.Text == "]" && selector != null)
{
currentPosition++;
}
else
{
//parse error lolz
}
}
return(selector);
}
public TypeSelector(string name, SelectorNamespacePrefix prefix)
: this(name)
{
this.Namespace = prefix;
}
public UniversalSelector(SelectorNamespacePrefix prefix)
: base("*", prefix)
{
}
