/// <summary>
/// Initializes a new instance of the <see cref="MediaPickerPopoverDelegate"/> class.
/// </summary>
/// <param name="pickerDelegate">The picker delegate.</param>
/// <param name="picker">The picker.</param>
internal MediaPickerPopoverDelegate(MediaPickerDelegate pickerDelegate, UIImagePickerController picker)
{
_pickerDelegate = pickerDelegate;
_picker = picker;
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaPickerController"/> class.
/// </summary>
/// <param name="mpDelegate">The mp delegate.</param>
internal MediaPickerController(MediaPickerDelegate mpDelegate)
{
base.Delegate = mpDelegate;
}
/// <summary>
/// Gets the media asynchronous.
/// </summary>
/// <param name="sourceType">Type of the source.</param>
/// <param name="mediaType">Type of the media.</param>
/// <param name="options">The options.</param>
/// <returns>Task<MediaFile>.</returns>
/// <exception cref="InvalidOperationException">
/// There's no current active window
/// or
/// Could not find current view controller
/// or
/// Only one operation can be active at at time
/// </exception>
private Task <MediaFile> GetMediaAsync(
UIImagePickerControllerSourceType sourceType,
string mediaType,
MediaStorageOptions options = null)
{
var window = UIApplication.SharedApplication.KeyWindow;
if (window == null)
{
throw new InvalidOperationException("There's no current active window");
}
var viewController = window.RootViewController;
#if __IOS_10__
if (viewController == null || (viewController.PresentedViewController != null && viewController.PresentedViewController.GetType() == typeof(UIAlertController)))
{
window =
UIApplication.SharedApplication.Windows.OrderByDescending(w => w.WindowLevel)
.FirstOrDefault(w => w.RootViewController != null);
if (window == null)
{
throw new InvalidOperationException("Could not find current view controller");
}
viewController = window.RootViewController;
}
#endif
while (viewController.PresentedViewController != null)
{
viewController = viewController.PresentedViewController;
}
var ndelegate = new MediaPickerDelegate(viewController, sourceType, options);
var od = Interlocked.CompareExchange(ref _pickerDelegate, ndelegate, null);
if (od != null)
{
throw new InvalidOperationException("Only one operation can be active at at time");
}
var picker = SetupController(ndelegate, sourceType, mediaType, options);
if (UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Pad &&
sourceType == UIImagePickerControllerSourceType.PhotoLibrary)
{
ndelegate.Popover = new UIPopoverController(picker)
{
Delegate = new MediaPickerPopoverDelegate(ndelegate, picker)
};
ndelegate.DisplayPopover();
}
else
{
viewController.PresentViewController(picker, true, null);
}
return(ndelegate.Task.ContinueWith(
t =>
{
if (_popover != null)
{
_popover.Dispose();
_popover = null;
}
Interlocked.Exchange(ref _pickerDelegate, null);
return t;
}).Unwrap());
}