private static async Task <DataObject> ToDataObject(DataPackageView src, CancellationToken ct)
{
var dst = new DataObject();
// WPF has no format for URI therefore text is used for both
if (src.Contains(StandardDataFormats.Text))
{
dst.SetText(await src.GetTextAsync().AsTask(ct));
}
else
{
var uri = DataPackage.CombineUri(
src.Contains(StandardDataFormats.WebLink) ? (await src.GetWebLinkAsync().AsTask(ct)).ToString() : null,
src.Contains(StandardDataFormats.ApplicationLink) ? (await src.GetApplicationLinkAsync().AsTask(ct)).ToString() : null,
src.Contains(StandardDataFormats.Uri) ? (await src.GetUriAsync().AsTask(ct)).ToString() : null);
if (string.IsNullOrEmpty(uri) == false)
{
dst.SetText(uri);
}
}
if (src.Contains(StandardDataFormats.Html))
{
dst.SetData(DataFormats.Html, await src.GetHtmlFormatAsync().AsTask(ct));
}
if (src.Contains(StandardDataFormats.Rtf))
{
dst.SetData(DataFormats.Rtf, await src.GetRtfAsync().AsTask(ct));
}
if (src.Contains(StandardDataFormats.Bitmap))
{
var srcStreamRef = await src.GetBitmapAsync().AsTask(ct);
var srcStream = await srcStreamRef.OpenReadAsync().AsTask(ct);
// We copy the source stream in memory to avoid marshalling issue with async stream
// and to make sure to read it async as it built from a RandomAccessStream which might be remote.
using var tmp = new MemoryStream();
await srcStream.AsStreamForRead().CopyToAsync(tmp);
tmp.Position = 0;
var dstBitmap = new BitmapImage();
dstBitmap.BeginInit();
dstBitmap.CreateOptions = BitmapCreateOptions.None;
dstBitmap.CacheOption = BitmapCacheOption.OnLoad; // Required for the BitmapImage to internally cache the data (so we can dispose the tmp stream)
dstBitmap.StreamSource = tmp;
dstBitmap.EndInit();
dst.SetData(DataFormats.Bitmap, dstBitmap, false);
}
if (src.Contains(StandardDataFormats.StorageItems))
{
var files = await src.GetStorageItemsAsync().AsTask(ct);
var paths = new StringCollection();
foreach (var item in files)
{
paths.Add(item.Path);
}
dst.SetFileDropList(paths);
}
return(dst);
}
