/// <summary>
/// Loads image data from a local file and set it to current image data.
/// </summary>
/// <param name="item">Target item</param>
internal async Task LoadSetAsync(FileItemViewModel item)
{
_tokenSourceLoading?.TryCancel(); // Canceling already canceled source will be simply ignored.
try
{
_tokenSourceLoading = new CancellationTokenSourcePlus();
byte[] data = null;
if (item.IsAvailableLocal && item.CanLoadDataLocal)
{
data = await FileAddition.ReadAllBytesAsync(ComposeLocalPath(item), _tokenSourceLoading.Token);
}
CurrentItem = item;
CurrentImageData = data;
}
catch (OperationCanceledException)
{
// None.
}
catch (FileNotFoundException)
{
item.Status = FileStatus.NotCopied;
item.IsAliveLocal = false;
}
catch (IOException)
{
item.IsAvailableLocal = false;
}
catch (Exception ex)
{
Debug.WriteLine($"Failed to load image data from local file.\r\n{ex}");
throw new UnexpectedException("Failed to load image data from local file.", ex);
}
finally
{
_tokenSourceLoading?.Dispose();
}
}
/// <summary>
/// Stops operation.
/// </summary>
internal void Stop()
{
StopAutoTimer();
_tokenSourceWorking?.TryCancel(); // Canceling already canceled source will be simply ignored.
}
