/// <summary>
/// Sends current image data to clipboard.
/// </summary>
internal async Task SendClipboardAsync()
{
if (CurrentImageData == null)
{
return;
}
try
{
IsSendingClipboard = true;
var image = await ImageManager.ConvertBytesToBitmapSourceAsync(CurrentImageData);
var tcs = new TaskCompletionSource <bool>();
var thread = new Thread(() =>
{
try
{
Clipboard.SetImage(image);
tcs.SetResult(true);
}
catch (Exception ex)
{
tcs.SetException(ex);
}
});
thread.SetApartmentState(ApartmentState.STA); // Clipboard class must run in STA thread.
thread.Start();
await tcs.Task;
}
catch (Exception ex)
{
Debug.WriteLine($"Failed to send image data to clipboard.\r\n{ex}");
}
finally
{
IsSendingClipboard = false;
}
}
/// <summary>
/// Gets a thumbnail of a specified image file in FlashAir card.
/// </summary>
/// <param name="client">HttpClient</param>
/// <param name="remoteFilePath">Remote file path</param>
/// <param name="card">FlashAir card information</param>
/// <param name="cancellationToken">CancellationToken</param>
/// <returns>Thumbnail of image file</returns>
internal static async Task <BitmapSource> GetThumbnailAsync(HttpClient client, string remoteFilePath, CardInfo card, CancellationToken cancellationToken)
{
if (string.IsNullOrWhiteSpace(remoteFilePath))
{
throw new ArgumentNullException(nameof(remoteFilePath));
}
var remotePath = ComposeRemotePath(FileManagerCommand.GetThumbnail, remoteFilePath);
try
{
var bytes = await DownloadBytesAsync(client, remotePath, card, cancellationToken).ConfigureAwait(false);
return(await ImageManager.ConvertBytesToBitmapSourceAsync(bytes).ConfigureAwait(false));
}
catch (ImageNotSupportedException)
{
// This exception should not be thrown because thumbnail data is directly provided by FlashAir card.
return(null);
}
catch (RemoteFileNotFoundException)
{
// If the format of image file is not JPEG or if there is no Exif standardized thumbnail stored,
// StatusCode will be HttpStatusCode.NotFound.
Debug.WriteLine("Image file is not JPEG format or does not contain standardized thumbnail.");
throw new RemoteFileThumbnailFailedException(remotePath);
}
catch (RemoteConnectionUnableException rcue) when(rcue.Code == HttpStatusCode.InternalServerError)
{
// If image file is non-standard JPEG format, StatusCode may be HttpStatusCode.InternalServerError.
Debug.WriteLine("Image file is non-standard JPEG format.");
throw new RemoteFileThumbnailFailedException(remotePath);
}
catch
{
Debug.WriteLine("Failed to get a thumbnail.");
throw;
}
}
