private static int CodePoint(char[] a)
{
if (a != null)
{
if (a.Length == 1 && JavaUtil.IsValidCodePoint(a[0]))
{
return(a[0]);
}
else
{
if (a.Length == 2 && Char.IsHighSurrogate(a[0]) && Char.IsLowSurrogate(a[1]))
{
return(JavaUtil.ToCodePoint(a[0], a[1]));
}
}
}
return(-1);
}
/// <summary>Gets the next token.</summary>
/// <returns>the next token</returns>
private CssDeclarationValueTokenizer.Token GetNextToken()
{
StringBuilder buff = new StringBuilder();
char curChar;
if (index >= src.Length - 1)
{
return(null);
}
if (inString)
{
bool isEscaped = false;
StringBuilder pendingUnicodeSequence = new StringBuilder();
while (++index < src.Length)
{
curChar = src[index];
if (isEscaped)
{
if (IsHexDigit(curChar) && pendingUnicodeSequence.Length < 6)
{
pendingUnicodeSequence.Append(curChar);
}
else
{
if (pendingUnicodeSequence.Length != 0)
{
int codePoint = Convert.ToInt32(pendingUnicodeSequence.ToString(), 16);
if (JavaUtil.IsValidCodePoint(codePoint))
{
buff.AppendCodePoint(codePoint);
}
else
{
buff.Append("\uFFFD");
}
pendingUnicodeSequence.Length = 0;
if (curChar == stringQuote)
{
inString = false;
return(new CssDeclarationValueTokenizer.Token(buff.ToString(), CssDeclarationValueTokenizer.TokenType.STRING
));
}
else
{
if (!iText.IO.Util.TextUtil.IsWhiteSpace(curChar))
{
buff.Append(curChar);
}
}
isEscaped = false;
}
else
{
buff.Append(curChar);
isEscaped = false;
}
}
}
else
{
if (curChar == stringQuote)
{
inString = false;
return(new CssDeclarationValueTokenizer.Token(buff.ToString(), CssDeclarationValueTokenizer.TokenType.STRING
));
}
else
{
if (curChar == '\\')
{
isEscaped = true;
}
else
{
buff.Append(curChar);
}
}
}
}
}
else
{
while (++index < src.Length)
{
curChar = src[index];
if (curChar == '(')
{
++functionDepth;
buff.Append(curChar);
}
else
{
if (curChar == ')')
{
--functionDepth;
buff.Append(curChar);
if (functionDepth == 0)
{
return(new CssDeclarationValueTokenizer.Token(buff.ToString(), CssDeclarationValueTokenizer.TokenType.FUNCTION
));
}
}
else
{
if (curChar == '"' || curChar == '\'')
{
stringQuote = curChar;
inString = true;
return(new CssDeclarationValueTokenizer.Token(buff.ToString(), CssDeclarationValueTokenizer.TokenType.FUNCTION
));
}
else
{
if (curChar == ',' && !inString && functionDepth == 0)
{
return(new CssDeclarationValueTokenizer.Token(",", CssDeclarationValueTokenizer.TokenType.COMMA));
}
else
{
if (iText.IO.Util.TextUtil.IsWhiteSpace(curChar))
{
if (functionDepth > 0)
{
buff.Append(curChar);
}
return(new CssDeclarationValueTokenizer.Token(buff.ToString(), functionDepth > 0 ? CssDeclarationValueTokenizer.TokenType
.FUNCTION : CssDeclarationValueTokenizer.TokenType.UNKNOWN));
}
else
{
buff.Append(curChar);
}
}
}
}
}
}
}
return(new CssDeclarationValueTokenizer.Token(buff.ToString(), CssDeclarationValueTokenizer.TokenType.FUNCTION
));
}