/// <summary>
/// Potentially prompts the user to unload the document.
/// </summary>
/// <returns>True if unload okay, otherwise false.</returns>
internal async Task <Boolean> PromptToUnloadAsync()
{
var descendants = GetAttachedReferences <IBrowsingContext>();
if (_view.HasEventListener(EventNames.BeforeUnload))
{
var unloadEvent = new Event(EventNames.BeforeUnload, bubbles: false, cancelable: true);
var shouldCancel = _view.Fire(unloadEvent);
_salvageable = false;
if (shouldCancel)
{
var data = new
{
Document = this,
IsCancelled = true,
};
await _context.FireAsync(EventNames.ConfirmUnload, data).ConfigureAwait(false);
if (data.IsCancelled)
{
return(false);
}
}
}
foreach (var descendant in descendants)
{
var active = descendant.Active as Document;
if (active != null)
{
var result = await active.PromptToUnloadAsync().ConfigureAwait(false);
if (!result)
{
return(false);
}
_salvageable = _salvageable && active._salvageable;
}
}
return(true);
}