/// <summary>
/// Called before the property name has been detected.
/// </summary>
public void CreateDeclarationWith(ICssProperties properties, ref CssToken token)
{
CollectTrivia(ref token);
var start = token.Position;
if (token.IsNot(CssTokenType.EndOfFile, CssTokenType.CurlyBracketClose, CssTokenType.Colon) &&
token.IsNot(CssTokenType.Semicolon, CssTokenType.CurlyBracketOpen))
{
var name = token.Data;
while (token.Type == CssTokenType.Delim)
{
token = NextToken();
name += token.Data;
}
token = NextToken();
CollectTrivia(ref token);
if (token.Type == CssTokenType.Colon)
{
token = NextToken();
CollectTrivia(ref token);
var value = CreateValue(ref token, out var important);
if (String.IsNullOrEmpty(value))
{
RaiseErrorOccurred(CssParseError.ValueMissing, token.Position);
}
else
{
properties.SetProperty(name, value, important ? CssKeywords.Important : null);
}
}
else
{
RaiseErrorOccurred(CssParseError.ColonMissing, token.Position);
}
JumpToDeclEnd(ref token);
}
else if (token.Type != CssTokenType.EndOfFile)
{
RaiseErrorOccurred(CssParseError.IdentExpected, start);
JumpToDeclEnd(ref token);
}
if (token.Type == CssTokenType.Semicolon)
{
token = NextToken();
}
}
private void JumpToEnd(ref CssToken current)
{
while (current.IsNot(CssTokenType.EndOfFile, CssTokenType.Semicolon))
{
current = NextToken();
}
}
/// <summary>
/// Fills the given parent style with declarations given by the tokens.
/// </summary>
public CssStyleDeclaration FillDeclarations(CssStyleDeclaration style, CssToken token)
{
CollectTrivia(ref token);
while (token.IsNot(CssTokenType.EndOfFile, CssTokenType.CurlyBracketClose))
{
CreateDeclarationWith(style, ref token);
CollectTrivia(ref token);
}
return(style);
}
public List<CssMedium> CreateMedia(ref CssToken token)
{
var list = new List<CssMedium>();
while (token.Type != CssTokenType.Eof)
{
var medium = CreateMedium(ref token);
if (medium == null || token.IsNot(CssTokenType.Comma, CssTokenType.Eof))
throw new DomException(DomError.Syntax);
list.Add(medium);
token = _tokenizer.Get();
}
return list;
}
/// <summary>
/// State that is called once we are in a CSS selector.
/// </summary>
ISelector CreateSelector(ref CssToken token)
{
var selector = Pool.NewSelectorConstructor();
_tokenizer.State = CssParseMode.Selector;
var start = token;
while (token.IsNot(CssTokenType.Eof, CssTokenType.CurlyBracketOpen, CssTokenType.CurlyBracketClose))
{
selector.Apply(token);
token = _tokenizer.Get();
}
if (selector.IsValid == false)
RaiseErrorOccurred(CssParseError.InvalidSelector, start);
_tokenizer.State = CssParseMode.Data;
return selector.ToPool();
}
private void JumpToEnd(ref CssToken current)
{
while (current.IsNot(CssTokenType.EndOfFile, CssTokenType.Semicolon))
{
current = NextToken();
}
}
/// <summary>
/// Creates a list of CssMedium objects.
/// </summary>
public List<CssMedium> CreateMedia(ref CssToken token)
{
var list = new List<CssMedium>();
CollectTrivia(ref token);
while (token.Type != CssTokenType.EndOfFile)
{
var medium = CreateMedium(ref token);
if (medium == null || token.IsNot(CssTokenType.Comma, CssTokenType.EndOfFile))
throw new DomException(DomError.Syntax);
token = NextToken();
CollectTrivia(ref token);
list.Add(medium);
}
return list;
}
private MediaFeature CreateFeature(ref CssToken token)
{
if (token.Type == CssTokenType.Ident)
{
var start = token.Position;
var val = CssValue.Empty;
var feature = _parser.Options.IsToleratingInvalidConstraints ?
new UnknownMediaFeature(token.Data) : Factory.MediaFeatures.Create(token.Data);
token = NextToken();
if (token.Type == CssTokenType.Colon)
{
var value = Pool.NewValueBuilder();
token = NextToken();
while (token.IsNot(CssTokenType.RoundBracketClose, CssTokenType.EndOfFile) || !value.IsReady)
{
value.Apply(token);
token = NextToken();
}
val = value.ToPool();
}
else if (token.Type == CssTokenType.EndOfFile)
{
return null;
}
if (feature != null && feature.TrySetValue(val))
{
var node = feature as CssNode;
if (node != null)
{
var end = token.Position.Shift(-1);
node.SourceCode = CreateView(start, end);
}
return feature;
}
}
else
{
JumpToArgEnd(ref token);
}
return null;
}
private CssValue CreateValue(CssTokenType closing, ref CssToken token, out Boolean important)
{
var value = Pool.NewValueBuilder();
_tokenizer.IsInValue = true;
token = NextToken();
var start = token.Position;
while (token.IsNot(CssTokenType.EndOfFile, CssTokenType.Semicolon, closing))
{
value.Apply(token);
token = NextToken();
}
important = value.IsImportant;
_tokenizer.IsInValue = false;
var valueIsValid = value.IsValid;
var result = value.ToPool();
var node = result as CssNode;
if (node != null)
{
var end = token.Position.Shift(-1);
node.SourceCode = CreateView(start, end);
}
if (!valueIsValid && !_parser.Options.IsToleratingInvalidValues)
{
RaiseErrorOccurred(CssParseError.InvalidValue, start);
result = null;
}
return result;
}
private ISelector CreateSelector(ref CssToken token)
{
var selector = _parser.GetSelectorCreator();
var start = token.Position;
while (token.IsNot(CssTokenType.EndOfFile, CssTokenType.CurlyBracketOpen, CssTokenType.CurlyBracketClose))
{
selector.Apply(token);
token = NextToken();
}
var selectorIsValid = selector.IsValid;
var result = selector.ToPool();
var node = result as CssNode;
if (node != null)
{
var end = token.Position.Shift(-1);
node.SourceCode = CreateView(start, end);
}
if (!selectorIsValid && !_parser.Options.IsToleratingInvalidValues)
{
RaiseErrorOccurred(CssParseError.InvalidSelector, start);
result = null;
}
return result;
}