public Value Font(Parser parser)
{
var value = new NodeList();
var expression = new NodeList();
Node e;
var index = parser.Tokenizer.Location.Index;
while (e = Shorthand(parser) || Entity(parser))
{
expression.Add(e);
}
value.Add(NodeProvider.Expression(expression, index));
if (parser.Tokenizer.Match(','))
{
while (e = Expression(parser))
{
value.Add(e);
if (!parser.Tokenizer.Match(','))
{
break;
}
}
}
return(NodeProvider.Value(value, Important(parser), index));
}
//
// Expressions either represent mathematical operations,
// or white-space delimited Entities.
//
// 1px solid black
// @var * 2
//
public Expression Expression(Parser parser)
{
Node e;
var entities = new NodeList();
var index = parser.Tokenizer.Location.Index;
while (e = Addition(parser) || Entity(parser))
{
e.PostComments = PullComments();
entities.Add(e);
}
if (entities.Count > 0)
{
return(NodeProvider.Expression(entities, index));
}
return(null);
}
public Expression MediaFeature(Parser parser)
{
NodeList features = new NodeList();
var outerIndex = parser.Tokenizer.Location.Index;
while (true)
{
GatherComments(parser);
var keyword = Keyword(parser);
if (keyword)
{
keyword.PreComments = PullComments();
keyword.PostComments = GatherAndPullComments(parser);
features.Add(keyword);
}
else if (parser.Tokenizer.Match('('))
{
GatherComments(parser);
var memo = Remember(parser);
var index = parser.Tokenizer.Location.Index;
var property = Property(parser);
var preComments = GatherAndPullComments(parser);
// in order to support (color) and have rule/*comment*/: we need to keep :
// out of property
if (!string.IsNullOrEmpty(property) && !parser.Tokenizer.Match(':'))
{
Recall(parser, memo);
property = null;
}
GatherComments(parser);
memo = Remember(parser);
var entity = Entity(parser);
if (!entity || !parser.Tokenizer.Match(')'))
{
Recall(parser, memo);
// match "3/2" for instance
var unrecognised = parser.Tokenizer.Match(@"[^\){]+");
if (unrecognised)
{
entity = NodeProvider.TextNode(unrecognised.Value, parser.Tokenizer.Location.Index);
}
if (!unrecognised || !parser.Tokenizer.Match(')'))
{
throw new ParsingException("missing closing bracket for media feature", index);
}
}
if (!entity)
{
return(null);
}
entity.PreComments = PullComments();
entity.PostComments = GatherAndPullComments(parser);
if (!string.IsNullOrEmpty(property))
{
var rule = NodeProvider.Rule(property, entity, index);
rule.IsSemiColonRequired = false;
features.Add(NodeProvider.Paren(rule, index));
}
else
{
features.Add(NodeProvider.Paren(entity, index));
}
}
else
{
break;
}
}
if (features.Count == 0)
{
return(null);
}
return(NodeProvider.Expression(features, outerIndex));
}