// will HTML5 enable a more nicer solution?
internal static void CombineDelegate(IHTMLScript a, Action value)
{
var whenloaded_null = false;
var whenloaded = true;
// http://stackoverflow.com/questions/1929742/can-script-readystate-be-trusted-to-detect-the-end-of-dynamic-script-loading
var done = false;
Action yield = delegate
{
var readyState = a.readyState;
//Console.WriteLine(new { readyState });
if (readyState == null)
{
done = whenloaded_null;
}
if (readyState == "loaded")
{
done = whenloaded;
}
if (readyState == "complete")
{
done = whenloaded;
}
if (done)
{
whenloaded = false;
whenloaded_null = false;
value();
}
};
yield();
// loading from file:// causes IE 10 to load it instantly?
if (done)
{
return;
}
// enable trapping the event
whenloaded_null = true;
a.InternalEvent(true,
yield,
"load",
"onreadystatechange"
);
}
public static Task <IHTMLScript> ToTask(this IHTMLScript i)
{
var y = new TaskCompletionSource <IHTMLScript>();
i.onload +=
delegate
{
y.SetResult(i);
// cleanup
i.Orphanize();
};
i.AttachToHead();
return(y.Task);
}
public static TaskAwaiter <IHTMLScript> GetAwaiter(this IHTMLScript i)
{
return(i.ToTask().GetAwaiter());
}