private static string MatchEval(Match m, object data, bool htmlEncode)
{
var parser = new SimpleParser(m.Groups[1].Value)
{
GlobalType = data.GetType(),
StaticTypes = new[] { typeof(Path) },
};
var valueExecutor = parser.Read<TemplateParser.ValueBuilder, TemplateParser.INode>();
var type = valueExecutor.Compile(parser.GlobalType);
var value = valueExecutor.Execute(data);
var result = value.ToString();
if (htmlEncode)
result = HttpUtility.HtmlEncode(result);
return result;
}
private static string MatchEval(Match m, object data, bool htmlEncode)
{
var parser = new SimpleParser(m.Groups[1].Value)
{
GlobalType = data.GetType()
};
var valueExecutor = parser.Read <TemplateParser.ValueBuilder, TemplateParser.INode>();
var type = valueExecutor.Compile(parser.GlobalType);
var value = valueExecutor.Execute(data);
var result = value.ToString();
if (htmlEncode)
{
result = HttpUtility.HtmlEncode(result);
}
return(result);
}
/// <summary>
/// Reads the code trying to extract the AST from it.
/// </summary>
/// <param name="parser">The parser object used to read the code.</param>
/// <param name="prevData">Previously parsed result. This is used to chain results together.</param>
/// <returns>Returns an object that results from parsing the code.</returns>
public override object Read(SimpleParser parser, object prevData)
{
var prevExecutor = (INode)prevData;
parser.SkipSpaces();
if (prevExecutor == null)
{
var name = this.ReadName(parser);
// this is a direct method call in the root
var call = ReadMethodCall(parser, null, name);
if (call != null)
return call;
// this is a global property
if (!string.IsNullOrWhiteSpace(name))
return new PropertyGet { Name = name, Element = null };
// this is an array construct
if (parser.ReadChar('{'))
{
var values = parser.ReadList<ValueBuilder, INode>(ReadListSeparator);
if (values.Count > 0)
{
parser.SkipSpaces();
if (!parser.ReadChar('}'))
return new Exception("Unterminated array construct.");
return new ArrayConstruct { Values = values };
}
}
// this is a precedence operator
if (parser.ReadChar('('))
{
var value = parser.Read<ValueBuilder, INode>();
if (value == null)
return new Exception("Syntax error.");
parser.SkipSpaces();
if (!parser.ReadChar(')'))
return new Exception("Unterminated precedence construct.");
return value;
}
// this is a number literal
var number = parser.ReadWhileCharOrEof(char.IsNumber);
if (number.Length > 0)
return new NumberLiteral { Data = number };
// this is a string literal
if (parser.ReadChar('"'))
{
var strBuilder = new StringBuilder();
while (true)
{
strBuilder.Append(parser.ReadWhileCharOrEof(ch => ch != '\\' && ch != '"'));
if (parser.Eof)
return new InvalidOperationException("String literal not terminated.");
if (parser.ReadChar('\\'))
{
if (parser.ReadChar('0')) strBuilder.Append('\0');
else if (parser.ReadChar('n')) strBuilder.Append('\n');
else if (parser.ReadChar('r')) strBuilder.Append('\r');
else if (parser.ReadChar('\\')) strBuilder.Append('\\');
else if (parser.ReadChar('"')) strBuilder.Append('"');
else
return new InvalidOperationException("Escape sequence not recognized.");
}
if (parser.ReadChar('"'))
break;
}
return new StringLiteral { Data = strBuilder.ToString() };
}
}
else
{
if (parser.ReadChar('.'))
{
var name = this.ReadName(parser);
// this is a direct method call in the previous element
var call = ReadMethodCall(parser, prevExecutor, name);
if (call != null)
return call;
if (!string.IsNullOrWhiteSpace(name))
return new PropertyGet { Name = name, Element = prevExecutor };
}
// indexer property
if (parser.ReadChar('['))
{
var indexValues = parser.ReadList<ValueBuilder, INode>(ReadListSeparator);
if (indexValues.Count == 0)
return new Exception("Index is missing.");
parser.SkipSpaces();
if (!parser.ReadChar(']'))
return new Exception("Unterminated indexer.");
return new IndexerGet { Element = prevExecutor, Indexes = indexValues };
}
// this only happens when calling a delegate
// direct method calls never fall here
if (parser.ReadChar('('))
{
var paramValues = parser.ReadList<ValueBuilder, INode>(ReadListSeparator);
parser.SkipSpaces();
if (parser.ReadChar(')'))
return new Call { Element = prevExecutor, Name = "Invoke", Parameters = paramValues };
}
if (parser.ReadChar('?'))
{
var trueValue = parser.Read<ValueBuilder, INode>();
parser.SkipSpaces();
if (!parser.ReadChar(':'))
throw new Exception("Missing ':' for ternary operator a?b:c.");
parser.SkipSpaces();
var falseValue = parser.Read<ValueBuilder, INode>();
return new TernaryInlineIf { Condition = prevExecutor, TrueValue = trueValue, FalseValue = falseValue };
}
var binOp = parser.ReadAnyStringAlternative("==", "!=", ">", "<", ">=", "<=", "&&", "||");
if (binOp != null)
{
var valueB = parser.Read<ValueBuilder, INode>();
return new BinaryBoolOps { ValueA = prevExecutor, ValueB = valueB, Operator = binOp };
}
}
return null;
}
