//
// A Mixin definition, with a list of parameters
//
// .rounded (@radius: 2px, @color) {
// ...
// }
//
// Until we have a finer grained state-machine, we have to
// do a look-ahead, to make sure we don't have a mixin call.
// See the `rule` function for more information.
//
// We start by matching `.rounded (`, and then proceed on to
// the argument list, which has optional default values.
// We store the parameters in `params`, with a `value` key,
// if there is a value, such as in the case of `@radius`.
//
// Once we've got our params list, and a closing `)`, we parse
// the `{...}` block.
//
public MixinDefinition MixinDefinition(Parser parser)
{
if ((parser.Tokenizer.CurrentChar != '.' && parser.Tokenizer.CurrentChar != '#') ||
parser.Tokenizer.Peek(@"[^{]*(;|})"))
{
return(null);
}
var index = parser.Tokenizer.Location.Index;
var match = parser.Tokenizer.Match(@"([#.](?:[\w-]|\\(?:[a-fA-F0-9]{1,6} ?|[^a-fA-F0-9]))+)\s*\(");
if (!match)
{
return(null);
}
//mixin definition ignores comments before it - a css hack can't be part of a mixin definition,
//so it may as well be a rule before the definition
PushComments();
GatherAndPullComments(parser); // no store as mixin definition not output
var name = match[1];
var parameters = new NodeList <Rule>();
RegexMatchResult param = null;
Node param2 = null;
Func <bool> matchParam = () => (param = parser.Tokenizer.Match(@"@[\w-]+")) ||
(param2 = Literal(parser) ||
Keyword(parser));
for (var i = parser.Tokenizer.Location.Index; matchParam(); i = parser.Tokenizer.Location.Index)
{
if (param != null)
{
GatherAndPullComments(parser);
if (parser.Tokenizer.Match(':'))
{
GatherComments(parser);
var value = Expression(parser);
if (value)
{
parameters.Add(NodeProvider.Rule(param.Value, value, i));
}
else
{
throw new ParsingException("Expected value", i);
}
}
else
{
parameters.Add(NodeProvider.Rule(param.Value, null, i));
}
}
else
{
parameters.Add(NodeProvider.Rule(null, param2, i));
}
GatherAndPullComments(parser);
if (!parser.Tokenizer.Match(','))
{
break;
}
GatherAndPullComments(parser);
}
if (!parser.Tokenizer.Match(')'))
{
throw new ParsingException("Expected ')'", parser.Tokenizer.Location.Index);
}
GatherAndPullComments(parser);
var rules = Block(parser);
PopComments();
if (rules != null)
{
return(NodeProvider.MixinDefinition(name, parameters, rules, index));
}
return(null);
}
//
// A Mixin definition, with a list of parameters
//
// .rounded (@radius: 2px, @color) {
// ...
// }
//
// Until we have a finer grained state-machine, we have to
// do a look-ahead, to make sure we don't have a mixin call.
// See the `rule` function for more information.
//
// We start by matching `.rounded (`, and then proceed on to
// the argument list, which has optional default values.
// We store the parameters in `params`, with a `value` key,
// if there is a value, such as in the case of `@radius`.
//
// Once we've got our params list, and a closing `)`, we parse
// the `{...}` block.
//
public MixinDefinition MixinDefinition(Parser parser)
{
if (parser.Tokenizer.CurrentChar != '.' || parser.Tokenizer.Peek(@"[^{]*(;|})"))
{
return(null);
}
var index = parser.Tokenizer.Location.Index;
var match = parser.Tokenizer.Match(@"([#.][a-zA-Z0-9_-]+)\s*\(");
if (!match)
{
return(null);
}
var name = match[1];
var parameters = new NodeList <Rule>();
RegexMatchResult param = null;
Node param2 = null;
Func <bool> matchParam = () => (param = parser.Tokenizer.Match(@"@[\w-]+")) ||
(param2 = Literal(parser) ||
Keyword(parser));
for (var i = parser.Tokenizer.Location.Index; matchParam(); i = parser.Tokenizer.Location.Index)
{
if (param != null)
{
if (parser.Tokenizer.Match(':'))
{
var value = Expression(parser);
if (value)
{
parameters.Add(NodeProvider.Rule(param.Value, value, i));
}
else
{
throw new ParsingException("Expected value", i);
}
}
else
{
parameters.Add(NodeProvider.Rule(param.Value, null, i));
}
}
else
{
parameters.Add(NodeProvider.Rule(null, param2, i));
}
if (!parser.Tokenizer.Match(','))
{
break;
}
}
if (!parser.Tokenizer.Match(')'))
{
throw new ParsingException("Expected ')'", parser.Tokenizer.Location.Index);
}
var rules = Block(parser);
if (rules != null)
{
return(NodeProvider.MixinDefinition(name, parameters, rules, index));
}
return(null);
}
