/// <summary>
/// Initializes a new instance of the <see cref="BindingMarkup"/> class.
/// </summary>
public BindingMarkup()
{
Path = new BindingGetPropertyExpression();
}
/// <summary>
/// Reads the expression.
/// </summary>
private Expressions.BindingPathExpression ReadExpression(List<BindingToken> tokens, ref int index)
{
if (!(tokens[index] is BindingTextToken))
{
ThrowParserError("The expression must start with identifier.", tokens[index]);
}
var text = ((BindingTextToken)tokens[index]).Text;
var binding = new BindingGetPropertyExpression() { PropertyName = text };
if (index + 1 < tokens.Count && tokens[index + 1] is BindingOpenIndexerToken)
{
var first = ((BindingTextToken)tokens[index + 2]).Text;
if (tokens[index + 3] is BindingCloseIndexerToken)
{
// identifier[index]
index += 3;
int firstValue;
if (!int.TryParse(first, out firstValue) || firstValue < 0)
{
ThrowParserError("The array index must be integer and must not be negative!", tokens[index + 2]);
}
binding.Indexer = new BindingArrayGetByIndexExpression() { Index = firstValue };
}
else
{
// identifier[property=value]
var second = ((BindingTextToken)tokens[index + 4]).Text;
index += 5;
binding.Indexer = new BindingArrayGetByKeyExpression() { KeyPropertyName = first, KeyValue = second };
}
}
if (index + 1 < tokens.Count)
{
if (tokens[index + 1] is BindingDotToken)
{
// identifier.identifier
index += 2;
binding.NextExpression = ReadExpression(tokens, ref index);
return binding;
}
else if (tokens[index + 1] is BindingEqualsToken && binding.Indexer == null)
{
// identifier = expression
index += 2;
return new BindingParameterSetExpression() { ParameterName = text, Value = ReadExpression(tokens, ref index) };
}
else if (tokens[index + 1] is BindingOpenBraceToken && binding.Indexer == null)
{
// identifier(expr, expr2...)
index += 2;
var expr = new BindingCallMethodExpression() { MethodName = text };
while (!(tokens[index] is BindingCloseBraceToken))
{
if (expr.Arguments.Count > 0)
{
if (!(tokens[index] is BindingCommaToken))
{
ThrowParserError("The binding parameters must be separated by comma.", tokens[index]);
}
index++;
}
var param = ReadExpression(tokens, ref index);
expr.Arguments.Add(param);
}
index++;
return expr;
}
}
index++;
return binding;
}