public override bool Equals(object obj)
{
if (obj == null || GetType() != obj.GetType())
{
return(false);
}
else
{
LangFilter t = (LangFilter)obj;
return(lang.Equals(t.lang));
}
}
private IFilter ParsePseudoFilter()
{
IFilter selector = null;
if (CurrentToken.Text == ":")
{
currentPosition++;
ParseErrorIfEnd();
if (CurrentToken.Text == ":")
{
ParseError(":: selectors do not apply to static html, so were not implemented.");
}
else if (CurrentToken.TokenType == SelectorTokenType.Ident)
{
var filterLookup = new Dictionary<string, IFilter>()
{
{ "root", new RootFilter() },
{ "first-child", new FirstChildFilter() },
{ "last-child", new LastChildFilter() },
{ "first-of-type", new FirstOfTypeFilter() },
{ "last-of-type", new LastOfTypeFilter() },
{ "only-child", new OnlyChildFilter() },
{ "only-of-type", new OnlyOfTypeFilter() },
{ "empty", new EmptyFilter() },
{ "enabled", new EnabledFilter() },
{ "disabled", new DisabledFilter() },
{ "checked", new CheckedFilter() }
};
if (filterLookup.ContainsKey(CurrentToken.Text))
{
selector = filterLookup[CurrentToken.Text];
currentPosition++;
}
else
{
ParseError("Unsupported or invalid pseudo selector :" + filterLookup);
}
}
else if (CurrentToken.TokenType == SelectorTokenType.Function)
{
var filterLookup = new Dictionary<string, Func<Expression, IFilter>>()
{
{ "nth-child(", e => new NthChildFilter(e) },
{ "nth-last-child(", e => new NthLastChildFilter(e) },
{ "nth-of-type(", e => new NthOfTypeFilter(e) },
{ "nth-last-of-type(", e => new NthLastOfTypeFilter(e) }
};
if (filterLookup.ContainsKey(CurrentToken.Text))
{
string text = CurrentToken.Text;
currentPosition++;
ParseErrorIfEnd();
SkipWhiteSpace();
ParseErrorIfEnd();
Expression expression = ParseExpression();
if (expression == null)
{
ParseError("Unable to parse expression");
}
selector = filterLookup[text](expression);
}
else if (CurrentToken.Text == "lang(")
{
currentPosition++;
ParseErrorIfEnd();
SkipWhiteSpace();
ParseErrorIfEnd();
if (CurrentToken.TokenType == SelectorTokenType.Ident)
{
selector = new LangFilter(CurrentToken.Text);
}
else if (CurrentToken.TokenType == SelectorTokenType.String)
{
selector = new LangFilter(CurrentToken.Text.Substring(1, CurrentToken.Text.Length - 2));
}
}
else
{
ParseError("Unrecognized pseudo function");
}
currentPosition++;
Consume(")");
}
}
return selector;
}
private IFilter ParsePseudoFilter()
{
IFilter selector = null;
if (CurrentToken.Text == ":")
{
currentPosition++;
ParseErrorIfEnd();
if (CurrentToken.Text == ":")
{
ParseError(":: selectors do not apply to static html, so were not implemented.");
}
else if (CurrentToken.TokenType == SelectorTokenType.Ident)
{
var filterLookup = new Dictionary <string, IFilter>()
{
{ "root", new RootFilter() },
{ "first-child", new FirstChildFilter() },
{ "last-child", new LastChildFilter() },
{ "first-of-type", new FirstOfTypeFilter() },
{ "last-of-type", new LastOfTypeFilter() },
{ "only-child", new OnlyChildFilter() },
{ "only-of-type", new OnlyOfTypeFilter() },
{ "empty", new EmptyFilter() },
{ "enabled", new EnabledFilter() },
{ "disabled", new DisabledFilter() },
{ "checked", new CheckedFilter() }
};
if (filterLookup.ContainsKey(CurrentToken.Text))
{
selector = filterLookup[CurrentToken.Text];
currentPosition++;
}
else
{
ParseError("Unsupported or invalid pseudo selector :" + filterLookup);
}
}
else if (CurrentToken.TokenType == SelectorTokenType.Function)
{
var filterLookup = new Dictionary <string, Func <Expression, IFilter> >()
{
{ "nth-child(", e => new NthChildFilter(e) },
{ "nth-last-child(", e => new NthLastChildFilter(e) },
{ "nth-of-type(", e => new NthOfTypeFilter(e) },
{ "nth-last-of-type(", e => new NthLastOfTypeFilter(e) }
};
if (filterLookup.ContainsKey(CurrentToken.Text))
{
string text = CurrentToken.Text;
currentPosition++;
ParseErrorIfEnd();
SkipWhiteSpace();
ParseErrorIfEnd();
Expression expression = ParseExpression();
if (expression == null)
{
ParseError("Unable to parse expression");
}
selector = filterLookup[text](expression);
}
else if (CurrentToken.Text == "lang(")
{
currentPosition++;
ParseErrorIfEnd();
SkipWhiteSpace();
ParseErrorIfEnd();
if (CurrentToken.TokenType == SelectorTokenType.Ident)
{
selector = new LangFilter(CurrentToken.Text);
}
else if (CurrentToken.TokenType == SelectorTokenType.String)
{
selector = new LangFilter(CurrentToken.Text.Substring(1, CurrentToken.Text.Length - 2));
}
}
else
{
ParseError("Unrecognized pseudo function");
}
currentPosition++;
Consume(")");
}
}
return(selector);
}