private async Task <BitmapImage> LoadPageCacheObjectThumbnailImage(PageCacheObject PageCacheObject)
{
BitmapImage ThumbnailImage = null;
if (Equals(PageCacheObject.ThumbnailImage, null))
{
try
{
Stream ThumbnailImageStream = await App.CORE.ZipManager.ReadAsync(ChapterArchiveFilePath, PageCacheObject.PageObject.Name).Retry(TIMEOUT);
if (!Equals(ThumbnailImageStream, null))
{
using (ThumbnailImageStream)
{
ThumbnailImage = new BitmapImage();
ThumbnailImage.BeginInit();
ThumbnailImage.DecodePixelWidth = 200;
ThumbnailImage.CacheOption = BitmapCacheOption.OnLoad;
ThumbnailImage.CreateOptions = BitmapCreateOptions.PreservePixelFormat;
using (ThumbnailImage.StreamSource = ThumbnailImageStream)
{
ThumbnailImage.EndInit();
ThumbnailImage.Freeze();
}
}
}
}
catch (OperationCanceledException) { ThumbnailImage = null; }
catch (Exception ex) { throw ex; }
finally { }
}
return(ThumbnailImage);
}
private async Task <List <PageCacheObject> > LoadPageCacheObjectsAsync()
{
try
{
if (!Equals(PageCacheObjectsAsyncCTS, null))
{
if (PageCacheObjectsAsyncCTS.Token.CanBeCanceled)
{
PageCacheObjectsAsyncCTS.Cancel();
}
}
}
catch { }
using (PageCacheObjectsAsyncCTS = new CancellationTokenSource())
{
List <PageCacheObject> PageCacheObjects = new List <PageCacheObject>();
foreach (PageObject PageObject in ChapterObject.Pages)
{
PageCacheObject PageCacheObject = new PageCacheObject(MangaObject, ChapterObject, PageObject);
PageCacheObject.ThumbnailImage = await LoadPageCacheObjectThumbnailImage(PageCacheObject);
PageCacheObjectsAsyncCTS.Token.ThrowIfCancellationRequested();
PageCacheObjects.Add(PageCacheObject);
}
return(PageCacheObjects);
}
}
