/// <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();
}
}
/// <inheritdoc />
public Func <RenderContext, string> CompilePartial(string template)
{
var document = CreateDocument(template);
// Collapse any whitespace.
var whitespace = new WhiteSpaceCollapsingParserVisitor();
document.Accept(whitespace);
return((context) =>
{
using (var writer = new StringWriter())
{
var render = new RenderingParserVisitor(writer, context, ModelMetadataProvider ?? new DefaultModelMetadataProvider())
{
Service = this
};
// Render the document.
document.Accept(render);
return writer.GetStringBuilder().ToString();
}
});
}
/// <inheritdoc />
public HandlebarTemplate Compile(string template)
{
var document = CreateDocument(template);
// Collapse any whitespace.
var whitespace = new WhiteSpaceCollapsingParserVisitor();
document.Accept(whitespace);
return((model, resolver) =>
{
using (var writer = new StringWriter())
{
var render = new RenderingParserVisitor(writer, model, ModelMetadataProvider ?? new DefaultModelMetadataProvider(), resolver)
{
Service = this
};
// Render the document.
document.Accept(render);
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;
}
/// <inheritdoc />
public Func<object, string> Compile(string template)
{
var document = CreateDocument(template);
// Collapse any whitespace.
var whitespace = new WhiteSpaceCollapsingParserVisitor();
document.Accept(whitespace);
return (model) =>
{
using (var writer = new StringWriter())
{
var render = new RenderingParserVisitor(writer, model, ModelMetadataProvider ?? new DefaultModelMetadataProvider())
{
Service = this
};
// Render the document.
document.Accept(render);
return writer.GetStringBuilder().ToString();
}
};
}
