public async Task<bool> MoveDocuments (IFile[] files, UIBarButtonItem duplicateButton, UIViewController fromViewController)
{
if (DismissSheetsAndPopovers ())
return false;
if (files.Length == 0)
return false;
//
// Make sure all the file systems are initialized
//
foreach (var fs in FileSystemManager.Shared.FileSystems) {
await InitializeFileSystemAsync (fs);
}
//
// Find where we're supposed to move to
//
var tcs = new TaskCompletionSource<bool> ();
var form = new MoveDocumentsForm {
Title = "Move " + DescribeFiles (files) + " to",
AutoCancelButton = true,
AutoDoneButton = false,
};
form.Dismissed += tcs.SetResult;
var formNav = new UINavigationController (form) {
ModalPresentationStyle = UIModalPresentationStyle.FormSheet,
};
formNav.NavigationBar.BarStyle = Theme.NavigationBarStyle;
await fromViewController.PresentViewControllerAsync (formNav, true);
var shouldMove = await tcs.Task;
if (!shouldMove)
return false;
//
// Skip the move?
//
if (ActiveFileSystem == form.FileSystem && CurrentDirectory == form.Directory) {
return true;
}
//
// Make sure we're not trying to move a directory into its own child
//
if (ActiveFileSystem == form.FileSystem) {
if (files.Any (x => x.IsDirectory && form.Directory.StartsWith (x.Path, StringComparison.Ordinal))) {
throw new Exception ("You cannot move a folder into one of its subfolders.");
}
}
//
// Perform the move
//
var list = CurrentDocumentListController;
foreach (var f in files) {
await MoveDoc (f, list, form.FileSystem, form.Directory, false);
}
//
// Update the UI
//
await list.LoadDocs ();
return true;
}