/// <summary> Evaluate the argument, convert to a String, and Evaluate again
/// (with the same context).
/// </summary>
/// <param name="context">
/// </param>
/// <param name="writer">
/// </param>
/// <param name="node">
/// </param>
/// <returns> True if the directive rendered successfully.
/// </returns>
/// <throws> IOException </throws>
/// <throws> ResourceNotFoundException </throws>
/// <throws> ParseErrorException </throws>
/// <throws> MethodInvocationException </throws>
public override bool Render(IInternalContextAdapter context, System.IO.TextWriter writer, INode node)
{
/*
* Evaluate the string with the current context. We know there is
* exactly one argument and it is a string or reference.
*/
object value = node.GetChild(0).Value(context);
string sourceText;
if (value != null)
{
sourceText = value.ToString();
}
else
{
sourceText = "";
}
/*
* The new string needs to be parsed since the text has been dynamically generated.
*/
string templateName = context.CurrentTemplateName;
SimpleNode nodeTree = null;
try
{
nodeTree = rsvc.Parse(new StringReader(sourceText), templateName, false);
}
catch (ParseException pex)
{
// use the line/column from the template
Info info = new Info(templateName, node.Line, node.Column);
throw new ParseErrorException(pex.Message, info);
}
catch (TemplateInitException pex)
{
Info info = new Info(templateName, node.Line, node.Column);
throw new ParseErrorException(pex.Message, info);
}
/*
* now we want to Init and render. Chain the context
* to prevent any changes to the current context.
*/
if (nodeTree != null)
{
IInternalContextAdapter ica = new EvaluateContext(context, rsvc);
ica.PushCurrentTemplateName(templateName);
try
{
try
{
nodeTree.Init(ica, rsvc);
}
catch (TemplateInitException pex)
{
Info info = new Info(templateName, node.Line, node.Column);
throw new ParseErrorException(pex.Message, info);
}
try
{
/*
* now render, and let any exceptions fly
*/
nodeTree.Render(ica, writer);
}
catch (ParseErrorException pex)
{
// convert any parsing errors to the correct line/col
Info info = new Info(templateName, node.Line, node.Column);
throw new ParseErrorException(pex.Message, info);
}
}
finally
{
ica.PopCurrentTemplateName();
}
return(true);
}
return(false);
}
