/// <summary>
/// Gets the result of the attribute value.
/// </summary>
/// <returns>The attribute result.</returns>
/// <param name="attribute">The content or replace attribute.</param>
/// <param name="context">The rendering context.</param>
/// <param name="mode">Exposes the mode (either <c>text</c>, <c>structure</c> or a <c>null</c> reference).</param>
private ExpressionResult GetAttributeResult(IZptAttribute attribute,
IRenderingContext context,
out string mode)
{
var match = ValueMatcher.Match(attribute.Value);
if(!match.Success)
{
string message = String.Format(ExceptionMessages.ZptAttributeParsingError,
ZptConstants.Tal.Namespace,
attribute.Name,
attribute.Value,
context.Element.Name);
throw new ParserException(message) {
SourceAttributeName = attribute.Name,
SourceAttributeValue = attribute.Value,
SourceElementName = context.Element.Name
};
}
mode = match.Groups[1].Value;
return context.TalModel.Evaluate(match.Groups[2].Value, context);
}
/// <summary>
/// Parses the value of a 'tal:repeat' attribute and exposes the variable name and expression.
/// </summary>
/// <param name="attribute">Attribute.</param>
/// <param name="variableName">Variable name.</param>
/// <param name="expression">Expression.</param>
/// <param name="element">The element which contains the attribute.</param>
private void ParseAttributeValue(IZptAttribute attribute,
out string variableName,
out string expression,
IZptElement element)
{
var attribMatch = AttributeMatcher.Match(attribute.Value);
if(!attribMatch.Success)
{
string message = String.Format(ExceptionMessages.ZptAttributeParsingError,
ZptConstants.Tal.Namespace,
ZptConstants.Tal.RepeatAttribute,
attribute.Value,
element.Name);
throw new ParserException(message) {
SourceAttributeName = ZptConstants.Tal.RepeatAttribute,
SourceElementName = element.Name,
SourceAttributeValue = attribute.Value
};
}
variableName = attribMatch.Groups[1].Value;
expression = attribMatch.Groups[2].Value;
}
