public Directive KeyFrameBlock(Parser parser, string name, string identifier, int index)
{
if (!parser.Tokenizer.Match('{'))
{
return(null);
}
NodeList keyFrames = new NodeList();
const string identifierRegEx = "from|to|([0-9]+%)";
while (true)
{
GatherComments(parser);
string keyFrameIdentifier;
var keyFrameIdentifier1 = parser.Tokenizer.Match(identifierRegEx);
if (!keyFrameIdentifier1)
{
break;
}
keyFrameIdentifier = keyFrameIdentifier1.Value;
if (parser.Tokenizer.Match(","))
{
var keyFrameIdentifier2 = parser.Tokenizer.Match(identifierRegEx);
if (!keyFrameIdentifier2)
{
throw new ParsingException("Comma in @keyframe followed by unknown identifier", parser.Tokenizer.Location.Index);
}
keyFrameIdentifier += "," + keyFrameIdentifier2;
}
var preComments = GatherAndPullComments(parser);
var block = Block(parser);
if (block == null)
{
throw new ParsingException("Expected css block after key frame identifier", parser.Tokenizer.Location.Index);
}
block.PreComments = preComments;
block.PostComments = GatherAndPullComments(parser);
keyFrames.Add(NodeProvider.KeyFrame(keyFrameIdentifier, block, parser.Tokenizer.Location.Index));
}
if (!parser.Tokenizer.Match('}'))
{
throw new ParsingException("Expected start, finish, % or '}'", parser.Tokenizer.Location.Index);
}
return(NodeProvider.Directive(name, identifier, keyFrames, index));
}
