public static MarkupExtensionDescription Tokenize(XamlParserContext parserContext, ITextLocation lineInformation, string text)
{
MarkupExtensionDescription extensionDescription = new MarkupExtensionDescription();
MarkupExtensionParser.ScannerState scannerState = MarkupExtensionParser.ScannerState.Begin;
int startIndex = 0;
int index = 0;
string key = (string)null;
while (index < text.Length)
{
char c = text[index];
++index;
switch (scannerState)
{
case MarkupExtensionParser.ScannerState.Begin:
if ((int)c == 123)
{
scannerState = MarkupExtensionParser.ScannerState.ScanningMarkupExtensionName;
while (index < text.Length && Scanner.IsXmlWhitespace(text[index]))
{
++index;
}
startIndex = index;
continue;
}
if (!Scanner.IsXmlWhitespace(c))
{
parserContext.ReportError(XamlParseErrors.UnexpectedCharacter(lineInformation, c));
return((MarkupExtensionDescription)null);
}
continue;
case MarkupExtensionParser.ScannerState.ScanningMarkupExtensionName:
if ((int)c == 125 || Scanner.IsXmlWhitespace(c))
{
int length = index - startIndex - 1;
string str = MarkupExtensionParser.ReplaceEscapedCharacters(MarkupExtensionParser.TrimOffWhitespace(text.Substring(startIndex, length)));
if (str.Length > 0)
{
extensionDescription.Name = str;
scannerState = (int)c == 125 ? MarkupExtensionParser.ScannerState.End : MarkupExtensionParser.ScannerState.ScanningNameOrValue;
startIndex = index;
continue;
}
parserContext.ReportError(XamlParseErrors.MissingMarkupExtensionName(lineInformation));
return((MarkupExtensionDescription)null);
}
if ((int)c == 123 || (int)c == 44 || (int)c == 61)
{
parserContext.ReportError(XamlParseErrors.UnexpectedCharacter(lineInformation, c));
return((MarkupExtensionDescription)null);
}
continue;
case MarkupExtensionParser.ScannerState.ScanningNameOrValue:
case MarkupExtensionParser.ScannerState.ScanningValue:
switch (c)
{
case '=':
int length1 = index - startIndex - 1;
key = MarkupExtensionParser.ReplaceEscapedCharacters(MarkupExtensionParser.TrimOffQuotes(MarkupExtensionParser.TrimOffWhitespace(text.Substring(startIndex, length1))));
startIndex = index;
if (key.Length > 0)
{
scannerState = MarkupExtensionParser.ScannerState.ScanningValue;
continue;
}
parserContext.ReportError(XamlParseErrors.MissingArgumentName(lineInformation));
return((MarkupExtensionDescription)null);
case '\\':
if (index < text.Length)
{
++index;
continue;
}
continue;
case '{':
int num = 1;
while (index < text.Length)
{
char ch = text[index];
++index;
switch (ch)
{
case '\\':
if (index < text.Length)
{
++index;
break;
}
break;
case '{':
++num;
break;
case '}':
--num;
break;
}
if (num == 0)
{
break;
}
}
if (num != 0)
{
parserContext.ReportError(XamlParseErrors.UnexpectedEnd(lineInformation));
return((MarkupExtensionDescription)null);
}
continue;
case '}':
case ',':
int length2 = index - startIndex - 1;
string argumentName = MarkupExtensionParser.TrimOffQuotes(MarkupExtensionParser.TrimOffWhitespace(text.Substring(startIndex, length2)));
startIndex = index;
if (scannerState == MarkupExtensionParser.ScannerState.ScanningNameOrValue)
{
if (extensionDescription.NamedArguments.Count > 0)
{
parserContext.ReportError(XamlParseErrors.UnexpectedPositionalArgument(lineInformation, argumentName));
return((MarkupExtensionDescription)null);
}
extensionDescription.PositionalArguments.Add(argumentName);
}
else
{
if (string.IsNullOrEmpty(key))
{
parserContext.ReportError(XamlParseErrors.UnexpectedPositionalArgument(lineInformation, argumentName));
return((MarkupExtensionDescription)null);
}
extensionDescription.NamedArguments.Add(new KeyValuePair <string, string>(key, argumentName));
}
scannerState = (int)c != 125 ? MarkupExtensionParser.ScannerState.ScanningNameOrValue : MarkupExtensionParser.ScannerState.End;
continue;
case '"':
case '\'':
char ch1 = c;
while (index < text.Length)
{
char ch2 = text[index];
++index;
if ((int)ch1 == (int)ch2)
{
break;
}
}
continue;
default:
continue;
}
default:
if (!Scanner.IsXmlWhitespace(c))
{
parserContext.ReportError(XamlParseErrors.UnexpectedCharacter(lineInformation, c));
return((MarkupExtensionDescription)null);
}
continue;
}
}
if (scannerState == MarkupExtensionParser.ScannerState.End)
{
return(extensionDescription);
}
parserContext.ReportError(XamlParseErrors.UnexpectedEnd(lineInformation));
return((MarkupExtensionDescription)null);
}