protected virtual bool ParseArguments(ItemFactory itemFactory, ITextProvider text, TokenStream tokens)
{
if (tokens.CurrentToken.IsFunctionTerminator())
{
// There could be functions without arguments (like "filter: mask();")
return(false);
}
while (!tokens.CurrentToken.IsFunctionTerminator())
{
ParseItem fa = CreateArgumentObject(this, itemFactory, Arguments.Count);
if (fa.Parse(itemFactory, text, tokens))
{
fa.Context = GetArgumentContext(Arguments.Count);
Children.Add(fa);
Arguments.Add(fa);
}
else
{
// Don't know what this is
Children.AddUnknownAndAdvance(itemFactory, text, tokens, ParseErrorType.UnexpectedToken);
}
}
FunctionArgument lastArgument = (Arguments.Count > 0) ? Arguments[Arguments.Count - 1] as FunctionArgument : null;
if (lastArgument != null && lastArgument.Comma != null && lastArgument == Children[Children.Count - 1])
{
Children.AddParseError(ParseErrorType.FunctionArgumentMissing);
}
return(true);
}
protected virtual ParseItem CreateDefaultChild(ItemFactory itemFactory, ITextProvider text, TokenStream tokens)
{
ParseItem child = itemFactory.Create <KeyFramesRuleSet>(this);
if (!child.Parse(itemFactory, text, tokens))
{
child = UnknownItem.ParseUnknown(this, itemFactory, text, tokens, ParseErrorType.UnexpectedParseError);
}
return(child);
}
protected virtual ParseItem ParseDefaultChild(ItemFactory itemFactory, ITextProvider text, TokenStream tokens)
{
ParseItem newChild = itemFactory.Create <RuleSet>(this);
if (!newChild.Parse(itemFactory, text, tokens))
{
newChild = UnknownItem.ParseUnknown(this, itemFactory, text, tokens, ParseErrorType.UnexpectedToken);
}
return(newChild);
}
protected virtual ParseItem CreateDefaultChild(ItemFactory itemFactory, ITextProvider text, TokenStream tokens)
{
ParseItem newChild = itemFactory.Create <Declaration>(this);
if (!newChild.Parse(itemFactory, text, tokens))
{
newChild = UnknownItem.ParseUnknown(this, itemFactory, text, tokens, ParseErrorType.DeclarationExpected);
}
return(newChild);
}
protected virtual void ParseSelectorCombineOperator(ItemFactory itemFactory, ITextProvider text, TokenStream tokens)
{
if (IdReferenceOperator.IsAtIdReferenceOperator(tokens))
{
ParseItem combineOperator = itemFactory.Create <IdReferenceOperator>(this);
if (combineOperator.Parse(itemFactory, text, tokens))
{
SelectorCombineOperator = combineOperator;
Children.Add(combineOperator);
}
}
else
{
SelectorCombineOperator = Children.AddCurrentAndAdvance(tokens, CssClassifierContextType.SelectorCombineOperator);
}
}
public override bool Parse(IItemFactory itemFactory, ITextProvider text, ITokenStream stream)
{
if (stream.Current.Type == TokenType.Identifier && IsValidNamedRange(text.GetText(stream.Current.Start, stream.Current.Length)))
{
AnimationBegin = Children.AddCurrentAndAdvance(stream, SassClassifierType.Keyword);
}
else if (stream.Current.Type == TokenType.Number && stream.Peek(1).Type == TokenType.PercentSign)
{
ParseItem begin = itemFactory.Create <PercentageUnit>(this, text, stream);
if (begin.Parse(itemFactory, text, stream))
{
AnimationBegin = begin;
Children.Add(begin);
if (stream.Current.Type == TokenType.Comma)
{
Comma = Children.AddCurrentAndAdvance(stream, SassClassifierType.Punctuation);
}
ParseItem end = itemFactory.Create <PercentageUnit>(this, text, stream);
if (end.Parse(itemFactory, text, stream))
{
AnimationEnd = end;
Children.Add(end);
}
}
}
if (AnimationBegin != null)
{
var block = itemFactory.CreateSpecific <RuleBlock>(this, text, stream);
if (block.Parse(itemFactory, text, stream))
{
Body = block;
Children.Add(block);
}
}
return(Children.Count > 0);
}
internal virtual bool ParseInFunction(ItemFactory itemFactory, ITextProvider text, TokenStream tokens)
{
if (ItemName.IsAtItemName(tokens))
{
ItemName name = itemFactory.CreateSpecific <ItemName>(this);
if (name.Parse(itemFactory, text, tokens))
{
name.Context = CssClassifierContextCache.FromTypeEnum(CssClassifierContextType.ElementTagName);
Name = name;
Children.Add(name);
}
}
if (Name == null || Name.AfterEnd == tokens.CurrentToken.Start)
{
while (!IsAtSelectorTerminator(tokens) && tokens.CurrentToken.TokenType != CssTokenType.CloseFunctionBrace)
{
ParseItem childItem = CreateNextAtomicPart(itemFactory, text, tokens);
if (childItem == null || !childItem.Parse(itemFactory, text, tokens))
{
childItem = UnknownItem.ParseUnknown(this, itemFactory, text, tokens, ParseErrorType.PseudoFunctionSelectorExpected);
}
else
{
SubSelectors.Add(childItem);
}
Children.Add(childItem);
if (tokens.IsWhiteSpaceBeforeCurrentToken())
{
break;
}
}
}
return(Children.Count > 0);
}
public override bool Parse(ItemFactory itemFactory, ITextProvider text, TokenStream tokens)
{
bool hasSubject = false;
// Allow a bang before the tag name.
while (tokens.CurrentToken.TokenType == CssTokenType.Bang)
{
ParseItem item = itemFactory.Create <SubjectSelector>(this);
if (item.Parse(itemFactory, text, tokens))
{
Children.Add(item);
if (hasSubject)
{
item.AddParseError(ParseErrorType.UnexpectedBangInSelector, ParseErrorLocation.WholeItem);
}
hasSubject = true;
}
if (tokens.IsWhiteSpaceBeforeCurrentToken())
{
break;
}
}
if (ItemName.IsAtItemName(tokens))
{
ItemName name = itemFactory.CreateSpecific <ItemName>(this);
if (name.Parse(itemFactory, text, tokens))
{
name.Context = CssClassifierContextCache.FromTypeEnum(CssClassifierContextType.ElementTagName);
Name = name;
Children.Add(name);
}
}
ParseItem lastItem = (Children.Count > 0) ? Children[Children.Count - 1] : null;
// Only continue parsing the simple selector if the name touches the next token.
if (lastItem == null || lastItem.AfterEnd == tokens.CurrentToken.Start)
{
bool addedErrorItem = false;
while (!IsAtSelectorTerminator(tokens))
{
ParseItem pi = CreateNextAtomicPart(itemFactory, text, tokens);
if (pi == null)
{
// Only treat the first bad token as an error (don't need more than one in a row)
if (addedErrorItem)
{
pi = UnknownItem.ParseUnknown(this, itemFactory, text, tokens);
}
else
{
pi = UnknownItem.ParseUnknown(this, itemFactory, text, tokens, ParseErrorType.SimpleSelectorExpected);
addedErrorItem = true;
}
}
else if (!pi.Parse(itemFactory, text, tokens))
{
break;
}
if (pi is SubjectSelector)
{
if (hasSubject)
{
pi.AddParseError(ParseErrorType.UnexpectedBangInSelector, ParseErrorLocation.WholeItem);
}
hasSubject = true;
}
SubSelectors.Add(pi);
Children.Add(pi);
if (tokens.IsWhiteSpaceBeforeCurrentToken())
{
break;
}
}
}
if (IsAtSelectorCombineOperator(text, tokens))
{
ParseSelectorCombineOperator(itemFactory, text, tokens);
if (Name == null &&
SelectorCombineOperator != null &
SubSelectors.Count == 0 &&
!CanStartWithCombineOperator(SelectorCombineOperator))
{
SelectorCombineOperator.AddParseError(ParseErrorType.SelectorBeforeCombineOperatorMissing, ParseErrorLocation.BeforeItem);
}
}
return(Children.Count > 0);
}
internal static ParseItem ParseDirective(ComplexItem parent, ItemFactory itemFactory, ITextProvider text, TokenStream tokens)
{
Debug.Assert(tokens.CurrentToken.TokenType == CssTokenType.At);
CssToken atToken = tokens.CurrentToken;
CssToken nameToken = tokens.Peek(1);
ParseItem pi = null;
if (nameToken.TokenType == CssTokenType.At && AllowDoubleAt(text))
{
// Ignore the first @ in @@directive
atToken = nameToken;
nameToken = tokens.Peek(2);
}
if (nameToken.TokenType == CssTokenType.Identifier &&
nameToken.Start == atToken.AfterEnd)
{
if ("charset".Length == nameToken.Length && text.CompareTo(nameToken.Start, "charset", ignoreCase: false))
{
// must be lowercase, and not encoded
pi = itemFactory.Create <CharsetDirective>(parent);
}
else if ("import".Length == nameToken.Length && text.CompareTo(nameToken.Start, "import", ignoreCase: true))
{
pi = itemFactory.Create <ImportDirective>(parent);
}
else if ("page".Length == nameToken.Length && text.CompareTo(nameToken.Start, "page", ignoreCase: true))
{
pi = itemFactory.Create <PageDirective>(parent);
}
else if ("media".Length == nameToken.Length && text.CompareTo(nameToken.Start, "media", ignoreCase: true))
{
pi = itemFactory.Create <MediaDirective>(parent);
}
else if ("namespace".Length == nameToken.Length && text.CompareTo(nameToken.Start, "namespace", ignoreCase: true))
{
// CSS3 Namespaces
// http://www.w3.org/TR/css3-namespace/
pi = itemFactory.Create <NamespaceDirective>(parent);
}
else if (TextRange.CompareDecoded(nameToken.Start, nameToken.Length, text, "keyframes", ignoreCase: true) ||
TextRange.CompareDecoded(nameToken.Start, nameToken.Length, text, "-moz-keyframes", ignoreCase: true) ||
TextRange.CompareDecoded(nameToken.Start, nameToken.Length, text, "-ms-keyframes", ignoreCase: true) ||
TextRange.CompareDecoded(nameToken.Start, nameToken.Length, text, "-o-keyframes", ignoreCase: true) ||
TextRange.CompareDecoded(nameToken.Start, nameToken.Length, text, "-webkit-keyframes", ignoreCase: true))
{
// CSS3 Animations
// http://www.w3.org/TR/2009/WD-css3-animations-20090320/
pi = itemFactory.Create <KeyFramesDirective>(parent);
}
else if (TextRange.CompareDecoded(nameToken.Start, nameToken.Length, text, "font-face", ignoreCase: true))
{
// CSS3 Webfonts
// http://www.w3.org/TR/2002/WD-css3-webfonts-20020802/#font-descriptions
pi = itemFactory.Create <FontFaceDirective>(parent);
}
else if (TextRange.CompareDecoded(nameToken.Start, nameToken.Length, text, "counter", ignoreCase: true))
{
pi = itemFactory.Create <CounterDirective>(parent);
}
else if (TextRange.CompareDecoded(nameToken.Start, nameToken.Length, text, "viewport", ignoreCase: true))
{
pi = itemFactory.Create <ViewportDirective>(parent);
}
}
if (pi == null)
{
// some other stuff, like @top-center/left/top/middle... or @footnoote in CSS3
pi = itemFactory.Create <UnknownDirective>(parent);
}
pi.Parse(itemFactory, text, tokens);
return(pi);
}