public Task RunScriptAsync(ScriptLambda script)
{
var tcs = new TaskCompletionSource <object> ();
Action closure = () => {
try {
script(GetGlobalObject());
tcs.TrySetResult(null);
} catch (Exception e) {
tcs.TrySetException(e);
}
};
// We must execute synchronously if already on the main thread,
// otherwise a Wait() on the returned task would deadlock trying to
// dispatch back to the main thread while it's blocking on the Wait().
if (NSThread.IsMain)
{
closure();
}
else
{
webView.BeginInvokeOnMainThread(closure);
}
return(tcs.Task);
}
/// <summary>
/// Runs the specified script, possibly asynchronously.
/// </summary>
/// <remarks>
/// This method may dispatch to a different thread to run the passed lambda.
/// </remarks>
/// <param name="script">A lambda that interacts with the passed JavaScript global object.</param>
public Task RunScriptAsync(ScriptLambda script)
{
if (CanRunScriptOnMainThread)
{
script(GetGlobalObject());
return(Task.FromResult <object> (null));
}
else
{
// This simply ensures we're not running on the UI thread..
Action closure = () => script(GetGlobalObject());
return(Task.Run(closure));
}
}
/// <summary>
/// Runs the specified script, possibly asynchronously.
/// </summary>
/// <remarks>
/// This method is a convenience for: <code>webView.AsHybridWebView ().RunScriptAsync (script)</code>
/// This method may dispatch to a different thread to run the passed lambda.
/// </remarks>
/// <param name="webView">The Web View in which to run the script.</param>
/// <param name="script">A lambda that interacts with the passed JavaScript global object.</param>
public static Task RunScriptAsync(this UIWebView webView, ScriptLambda script)
{
return(webView.AsHybridWebView().RunScriptAsync(script));
}
/// <summary>
/// Runs the specified script, possibly asynchronously.
/// </summary>
/// <remarks>
/// This method may dispatch to a different thread to run the passed lambda.
/// </remarks>
/// <param name="script">A lambda that interacts with the passed JavaScript global object.</param>
public Task RunScriptAsync(ScriptLambda script)
{
return(Native.RunScriptAsync(script));
}
