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);
}
}
}