private async void PlayGif_OnPreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) { ProcessingGif = true; var metadata = await HttpClientFactory.AppApiService().GetUgoiraMetadata(Illust.Id); var ugoiraZip = metadata.UgoiraMetadataInfo.ZipUrls.Medium; var delay = metadata.UgoiraMetadataInfo.Frames.Select(f => f.Delay / 10).ToArray(); var streams = PixivIOHelper.ReadGifZipEntries(await PixivIOHelper.FromUrlInternal(ugoiraZip)).ToArray(); ProcessingGif = false; PlayingGif = true; #pragma warning disable 4014 Task.Run(async() => { while (!cancellationToken.IsCancellationRequested) { for (var i = 0; i < streams.Length && !cancellationToken.IsCancellationRequested; i++) { streams[i].Position = 0; ImgSource = PixivIOHelper.FromStream(streams[i]); await Task.Delay((int)delay[i], cancellationToken.Token); } } }); #pragma warning restore 4014 }
private async void DownloadGif() { var path = Path.Combine(Directory.CreateDirectory(AppContext.DownloadPathProvider.GetIllustrationPath()).FullName, AppContext.FileNameFormatter.FormatGif(DownloadContent)); try { var metadata = await HttpClientFactory.AppApiService().GetUgoiraMetadata(DownloadContent.Id); var ugoiraUrl = metadata.UgoiraMetadataInfo.ZipUrls.Medium; ugoiraUrl = !ugoiraUrl.EndsWith("ugoira1920x1080.zip") ? Regex.Replace(ugoiraUrl, "ugoira(\\d+)x(\\d+).zip", "ugoira1920x1080.zip") : ugoiraUrl; var delay = metadata.UgoiraMetadataInfo.Frames.Select(f => f.Delay / 10).ToArray(); if (cancellationTokenSource.IsCancellationRequested) { return; } await using var memory = await PixivIOHelper.Download(ugoiraUrl, new Progress <double>(d => Progress = d), cancellationTokenSource.Token); await using var gifStream = (MemoryStream)PixivIOHelper.MergeGifStream(PixivIOHelper.ReadGifZipEntries(memory), delay); if (cancellationTokenSource.IsCancellationRequested) { return; } await using var fileStream = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None); gifStream.WriteTo(fileStream); Application.Current.Invoke(() => DownloadFinished?.Invoke(this)); } catch (TaskCanceledException) { if (path != null && File.Exists(path)) { File.Delete(path); } } catch (Exception e) { if (!retried) { Restart(); retried = true; } else { HandleError(e, path); } } }