public static IDisposable BindPreviewLoading(
this ReplyModel model,
IPreviewLoader previewLoader)
{
if (model.Preview == null)
{
model.Preview = GetPreview(previewLoader, model);
if (model.Preview == null || model.Preview.Bitmap == null)
{
return(LoadPreview(previewLoader, model)
.SubscribeOn(RxApp.TaskpoolScheduler)
.ObserveOn(RxApp.MainThreadScheduler)
.Accept(preview =>
{
model.Preview = preview;
model.HasPreview = true;
}));
}
model.HasPreview = true;
}
return(Disposable.Empty);
}
private static Preview GetPreview(IPreviewLoader previewLoader, StickerMessageModel model)
{
if (model.StickerData?.Thumbnail != null)
{
return(previewLoader.GetPreview(model.StickerData.Thumbnail));
}
return(null);
}
private static IObservable <Preview> LoadPreview(IPreviewLoader previewLoader, VideoMessageModel model)
{
if (model.VideoData?.Thumbnail != null)
{
return(previewLoader.LoadPreview(model.VideoData.Thumbnail));
}
return(Observable.Empty <Preview>());
}
private static Preview GetPreview(IPreviewLoader previewLoader, PhotoMessageModel model)
{
if (model.PhotoData != null)
{
return(previewLoader.GetPreview(model.PhotoData, PreviewQuality.High));
}
return(null);
}
private static IObservable <Preview> LoadPreview(IPreviewLoader previewLoader, PhotoMessageModel model)
{
if (model.PhotoData != null)
{
return(previewLoader.LoadPreview(model.PhotoData, PreviewQuality.Low)
.Concat(previewLoader.LoadPreview(model.PhotoData, PreviewQuality.High)));
}
return(Observable.Empty <Preview>());
}
private static IObservable <Preview> LoadPreview(IPreviewLoader previewLoader, StickerMessageModel model)
{
if (model.StickerData != null)
{
if (model.StickerData?.Thumbnail != null)
{
return(previewLoader.LoadPreview(model.StickerData.Thumbnail)
.Concat(previewLoader.LoadPreview(model.StickerData)));
}
return(previewLoader.LoadPreview(model.StickerData));
}
return(Observable.Empty <Preview>());
}
private static IObservable <Preview> LoadPreview(IPreviewLoader previewLoader, ReplyModel model)
{
if (model.PhotoData != null)
{
return(previewLoader.LoadPreview(model.PhotoData, PreviewQuality.Low));
}
if (model.VideoData?.Thumbnail != null)
{
return(previewLoader.LoadPreview(model.VideoData.Thumbnail));
}
if (model.StickerData?.Thumbnail != null)
{
return(previewLoader.LoadPreview(model.StickerData.Thumbnail));
}
return(Observable.Empty <Preview>());
}
private static Preview GetPreview(IPreviewLoader previewLoader, ReplyModel model)
{
if (model.PhotoData != null)
{
return(previewLoader.GetPreview(model.PhotoData, PreviewQuality.Low));
}
if (model.VideoData?.Thumbnail != null)
{
return(previewLoader.GetPreview(model.VideoData.Thumbnail));
}
if (model.StickerData?.Thumbnail != null)
{
return(previewLoader.GetPreview(model.StickerData.Thumbnail));
}
return(null);
}
