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));
}
public Directive Media(Parser parser)
{
if (!parser.Tokenizer.Match("@media"))
{
return(null);
}
var index = parser.Tokenizer.Location.Index;
var features = MediaFeatures(parser);
var preRulesComments = GatherAndPullComments(parser);
var rules = Block(parser);
if (rules != null)
{
rules.PreComments = preRulesComments;
return(NodeProvider.Directive("@media", rules, features, index));
}
throw new ParsingException("@media block with unrecognised format", index);
}
//
// A CSS Directive
//
// @charset "utf-8";
//
public Directive Directive(Parser parser)
{
if (parser.Tokenizer.CurrentChar != '@')
{
return(null);
}
var import = Import(parser);
if (import)
{
return(import);
}
GatherComments(parser);
var index = parser.Tokenizer.Location.Index;
var name = parser.Tokenizer.MatchString(@"@[-a-z]+");
bool hasIdentifier = false, hasBlock = false, isKeyFrame = false;
NodeList rules, preRulesComments = null, preComments = null;
string identifierRegEx = @"[^{]+";
string nonVendorSpecificName = name;
if (name.StartsWith("@-") && name.IndexOf('-', 2) > 0)
{
nonVendorSpecificName = "@" + name.Substring(name.IndexOf('-', 2) + 1);
}
switch (nonVendorSpecificName)
{
case "@font-face":
hasBlock = true;
break;
case "@page":
case "@document":
case "@media":
case "@supports":
hasBlock = true;
hasIdentifier = true;
break;
case "@top-left":
case "@top-left-corner":
case "@top-center":
case "@top-right":
case "@top-right-corner":
case "@bottom-left":
case "@bottom-left-corner":
case "@bottom-center":
case "@bottom-right":
case "@bottom-right-corner":
case "@left-top":
case "@left-middle":
case "@left-bottom":
case "@right-top":
case "@right-middle":
case "@right-bottom":
hasBlock = true;
break;
case "@keyframes":
isKeyFrame = true;
hasIdentifier = true;
break;
}
string identifier = "";
preComments = PullComments();
if (hasIdentifier)
{
GatherComments(parser);
var identifierRegResult = parser.Tokenizer.MatchAny(identifierRegEx);
if (identifierRegResult != null)
{
identifier = identifierRegResult.Value.Trim();
}
}
preRulesComments = GatherAndPullComments(parser);
if (hasBlock)
{
rules = Block(parser);
if (rules != null)
{
rules.PreComments = preRulesComments;
return(NodeProvider.Directive(name, identifier, rules, index));
}
}
else if (isKeyFrame)
{
var keyframeblock = KeyFrameBlock(parser, name, identifier, index);
keyframeblock.PreComments = preRulesComments;
return(keyframeblock);
}
else
{
Node value;
if (value = Expression(parser))
{
value.PreComments = preRulesComments;
value.PostComments = GatherAndPullComments(parser);
if (parser.Tokenizer.Match(';'))
{
var directive = NodeProvider.Directive(name, value, index);
directive.PreComments = preComments;
return(directive);
}
}
}
return(null);
}