/// <summary>
/// 4.4.19. URL-single-quoted state
/// </summary>
CssToken UrlSQ(Char current)
{
while (true)
{
if (Specification.IsLineBreak(current))
{
RaiseErrorOccurred(ErrorCode.LineBreakUnexpected);
return(UrlBad(src.Next));
}
else if (Specification.EOF == current)
{
return(CssStringToken.Url(FlushBuffer()));
}
else if (current == Specification.SQ)
{
return(UrlEnd(src.Next));
}
else if (current == Specification.RSOLIDUS)
{
current = src.Next;
if (current == Specification.EOF)
{
src.Back(2);
RaiseErrorOccurred(ErrorCode.EOF);
return(CssStringToken.Url(FlushBuffer(), true));
}
else if (Specification.IsLineBreak(current))
{
stringBuffer.AppendLine();
}
else
{
stringBuffer.Append(ConsumeEscape(current));
}
}
else
{
stringBuffer.Append(current);
}
current = src.Next;
}
}
/// <summary>
/// 4.4.3. Single quoted string state
/// </summary>
CssToken StringSQ(Char current)
{
while (true)
{
switch (current)
{
case Specification.SQ:
case Specification.EOF:
return(CssStringToken.Plain(FlushBuffer()));
case Specification.FF:
case Specification.LF:
RaiseErrorOccurred(ErrorCode.LineBreakUnexpected);
src.Back();
return(CssStringToken.Plain(FlushBuffer(), true));
case Specification.RSOLIDUS:
current = src.Next;
if (Specification.IsLineBreak(current))
{
stringBuffer.AppendLine();
}
else if (current != Specification.EOF)
{
stringBuffer.Append(ConsumeEscape(current));
}
else
{
RaiseErrorOccurred(ErrorCode.EOF);
src.Back();
return(CssStringToken.Plain(FlushBuffer(), true));
}
break;
default:
stringBuffer.Append(current);
break;
}
current = src.Next;
}
}
/// <summary>
/// 4.4.22. Bad URL state
/// </summary>
CssToken UrlBad(Char current)
{
while (true)
{
if (current == Specification.EOF)
{
RaiseErrorOccurred(ErrorCode.EOF);
return(CssStringToken.Url(FlushBuffer(), true));
}
else if (current == ')')
{
return(CssStringToken.Url(FlushBuffer(), true));
}
else if (IsValidEscape(current))
{
current = src.Next;
stringBuffer.Append(ConsumeEscape(current));
}
current = src.Next;
}
}
/// <summary>
/// 4.4.21. URL-unquoted state
/// </summary>
CssToken UrlUQ(Char current)
{
while (true)
{
if (current.IsSpaceCharacter())
{
return(UrlEnd(src.Next));
}
else if (current == ')' || current == Specification.EOF)
{
return(CssStringToken.Url(FlushBuffer()));
}
else if (current == Specification.DQ || current == Specification.SQ || current == '(' || current.IsNonPrintable())
{
RaiseErrorOccurred(ErrorCode.InvalidCharacter);
return(UrlBad(src.Next));
}
else if (current == Specification.RSOLIDUS)
{
if (IsValidEscape(current))
{
current = src.Next;
stringBuffer.Append(ConsumeEscape(current));
}
else
{
RaiseErrorOccurred(ErrorCode.InvalidCharacter);
return(UrlBad(src.Next));
}
}
else
{
stringBuffer.Append(current);
}
current = src.Next;
}
}
