/// <summary>
/// Executes this tag.
/// </summary>
/// <param name="context">The <see cref="IMansionContext"/>.</param>
protected override void DoExecute(IMansionContext context)
{
// get arguments
var targetDataspace = GetRequiredAttribute<string>(context, "target");
var global = GetAttribute(context, "global", false);
// create the loop
var start = GetAttribute(context, "start", 0);
var end = Math.Max(start, GetAttribute(context, "end", int.MaxValue));
var loop = new Loop(context.Reader, start, end);
// push the loop to the stack
using (context.Stack.Push("Loop", loop))
{
// loop through all the rows
foreach (var row in loop.Rows)
{
// push the row to the stack
using (context.Stack.Push(targetDataspace, row, global))
ExecuteChildTags(context);
}
}
}
/// <summary>
/// Renders the crumb trail.
/// </summary>
/// <param name="context"></param>
/// <param name="trail"></param>
/// <returns></returns>
private string RenderTrail(IMansionContext context, IEnumerable<Crumb> trail)
{
// validate arguments
if (context == null)
throw new ArgumentNullException("context");
if (trail == null)
throw new ArgumentNullException("trail");
// create a dataset from the trail
var dataset = new Dataset();
foreach (var crumb in trail)
dataset.AddRow(PropertyBagAdapterFactory.Adapt(context, crumb));
// create a buffer in which to store the output
var templateBuffer = new StringBuilder();
using (var templateBufferPipe = new StringOutputPipe(templateBuffer))
using (context.OutputPipeStack.Push(templateBufferPipe))
using (templateService.Render(context, "CrumbTrail", TemplateServiceConstants.OutputTargetField))
{
// create the loop
var loop = new Loop(dataset);
using (context.Stack.Push("Loop", loop))
{
// render the leafs recursively
foreach (var crumb in loop.Rows)
{
using (context.Stack.Push("CrumbProperties", crumb))
templateService.Render(context, "CrumbTrailItem").Dispose();
}
}
}
// return the contents of the buffer
return templateBuffer.ToString();
}
