/// <summary>
/// Renders the content of a block helper.
/// </summary>
/// <param name="children">The children of the helper block.</param>
/// <param name="context">The render context.</param>
/// <param name="data">The new data model.</param>
/// <returns>The string content of the result.</returns>
private string RenderHelperChildren(IEnumerable <SyntaxTreeNode> children, RenderContext context, object data)
{
RenderContext targetContext = context;
RenderContextScope scope = null;
if (data != null)
{
scope = context.BeginScope(data);
targetContext = scope.ScopeContext;
}
using (var writer = new StringWriter())
{
var renderer = new RenderingParserVisitor(writer, targetContext, context.ModelMetadataProvider);
foreach (var node in children)
{
node.Accept(renderer);
}
if (scope != null)
{
scope.Dispose();
}
return(writer.GetStringBuilder().ToString());
}
}
/// <summary>
/// Creates a <see cref="RenderContext"/> using the renderer provided.
/// </summary>
/// <param name="renderer">The renderering parser visitor.</param>
/// <param name="model">The model.</param>
/// <returns>The render context.</returns>
public static RenderContext CreateRenderContext(RenderingParserVisitor renderer, object model = null)
{
if (renderer == null)
{
throw new ArgumentNullException("renderer");
}
var context = new RenderContext(renderer)
{
TemplateData = new TemplateData()
{
Model = model,
ModelMetadata = (model == null) ? null : renderer.ModelMetadataProvider.GetMetadataForType(() => model, model.GetType())
},
ModelMetadataProvider = renderer.ModelMetadataProvider,
Service = renderer.Service
};
return(context);
}