public override async ValueTask <Completion> WriteToAsync(TextWriter writer, TextEncoder encoder, TemplateContext context)
{
if (!context.AmbientValues.TryGetValue("Services", out var servicesValue))
{
throw new ArgumentException("Services missing while invoking 'helper'");
}
var services = servicesValue as IServiceProvider;
var viewContextAccessor = services.GetRequiredService <ViewContextAccessor>();
var viewContext = viewContextAccessor.ViewContext;
var arguments = (FilterArguments)(await _arguments.EvaluateAsync(context)).ToObjectValue();
var helper = _helper ?? arguments["helper_name"].Or(arguments.At(0)).ToStringValue();
var factory = services.GetRequiredService <LiquidTagHelperFactory>();
// Each tag is a singleton, as views are
if (_activator == null)
{
lock (this)
{
if (_activator == null)
{
_activator = factory.GetActivator(helper, arguments.Names);
}
}
}
if (_activator == LiquidTagHelperActivator.None)
{
return(Completion.Normal);
}
var tagHelper = factory.CreateTagHelper(_activator, (ViewContext)viewContext,
arguments, out var contextAttributes, out var outputAttributes);
var content = "";
// Build the ChildContent of this tag
using (var sb = StringBuilderPool.GetInstance())
{
using (var output = new StringWriter(sb.Builder))
{
if (Statements != null && Statements.Count > 0)
{
var completion = Completion.Break;
for (var index = 0; index < Statements.Count; index++)
{
completion = await Statements[index].WriteToAsync(output, encoder, context);
if (completion != Completion.Normal)
{
return(completion);
}
}
}
await output.FlushAsync();
}
content = sb.Builder.ToString();
}
var tagHelperContext = new TagHelperContext(contextAttributes, new Dictionary <object, object>(), Guid.NewGuid().ToString("N"));
var tagHelperOutput = new TagHelperOutput(helper, outputAttributes, (_, e)
=> Task.FromResult(new DefaultTagHelperContent().AppendHtml(content)));
tagHelperOutput.Content.AppendHtml(content);
await tagHelper.ProcessAsync(tagHelperContext, tagHelperOutput);
tagHelperOutput.WriteTo(writer, HtmlEncoder.Default);
return(Completion.Normal);
}
public override async Task <Completion> WriteToAsync(TextWriter writer, TextEncoder encoder, TemplateContext context)
{
if (!context.AmbientValues.TryGetValue("Services", out var servicesValue))
{
throw new ArgumentException("Services missing while invoking 'helper'");
}
var services = servicesValue as IServiceProvider;
if (!context.AmbientValues.TryGetValue("ViewContext", out var viewContext))
{
throw new ArgumentException("ViewContext missing while invoking 'helper'");
}
var arguments = (FilterArguments)(await _arguments.EvaluateAsync(context)).ToObjectValue();
var helper = _helper ?? arguments["helper_name"].Or(arguments.At(0)).ToStringValue();
var factory = services.GetRequiredService <LiquidTagHelperFactory>();
if (_activator == null)
{
lock (this)
{
if (_activator == null)
{
_activator = factory.GetActivator(helper, arguments.Names);
}
}
}
if (_activator == LiquidTagHelperActivator.None)
{
return(Completion.Normal);
}
var tagHelper = factory.CreateTagHelper(_activator, (ViewContext)viewContext,
arguments, out var contextAttributes, out var outputAttributes);
var content = new StringWriter();
if (Statements?.Any() ?? false)
{
Completion completion = Completion.Break;
for (var index = 0; index < Statements.Count; index++)
{
completion = await Statements[index].WriteToAsync(content, encoder, context);
if (completion != Completion.Normal)
{
return(completion);
}
}
}
var tagHelperContext = new TagHelperContext(contextAttributes,
new Dictionary <object, object>(), Guid.NewGuid().ToString("N"));
var tagHelperOutput = new TagHelperOutput(helper, outputAttributes, (_, e)
=> Task.FromResult(new DefaultTagHelperContent().AppendHtml(content.ToString())));
tagHelperOutput.Content.AppendHtml(content.ToString());
await tagHelper.ProcessAsync(tagHelperContext, tagHelperOutput);
tagHelperOutput.WriteTo(writer, HtmlEncoder.Default);
return(Completion.Normal);
}