public static BitmapSource GetWin32Icon(string fullName, IconSize size)
{
try
{
BitmapSource bmp;
switch (size)
{
case IconSize.ExtraSmall:
case IconSize.Small:
bmp = IconExtractor.GetFileIcon(fullName, size).ToBitmap().ToBitmapSource();
break;
case IconSize.Large:
bmp = jumboIconList.Icon(jumboIconList.IconIndex(fullName, Directory.Exists(fullName)))
.ToBitmap().Shrink(new System.Drawing.Size(90, 90)).ToBitmapSource();
break;
default:
bmp = jumboIconList.Icon(jumboIconList.IconIndex(fullName, Directory.Exists(fullName)))
.ToBitmap().ToBitmapSource();
break;
}
if (bmp != null)
{
bmp.Freeze();
}
return(bmp);
}
catch { }
return(null);
}
//private static async Task<BitmapSource> GetCachedAsync(string uri, Func<Task<BitmapSource>> getIcon)
//{
// BitmapSource data;
// if (_cache.TryGetValue(uri, out data))
// return data;
// data = await getIcon();
// try { _cache.Add(uri, data); }
// catch (ArgumentException)
// {
// // Since this method can be called asynchronously, there is a chance
// // that another call already created this key.
// }
// return data;
//}
public static async Task <BitmapSource> GetIcon(string fullName, IconSize size)
{
fullName = await IOHelpers.Normalize(fullName, false);
return(await Task.Factory.StartNew <BitmapSource>(() =>
{
if (fullName == string.Empty)
{
BitmapSource source = GetCached(fullName, size, GetDefaultComputerIcon);
if (source != null && source.CanFreeze)
{
source.Freeze();
}
return source;
}
else
{
bool isFile = File.Exists(fullName);
string cacheKey = fullName;
string extension = null;
if (isFile)
{
extension = Path.GetExtension(fullName).ToLower();
// Icons, executables, links, and cursors have unique icons.
if (IsUniqueIcon(extension))
{
cacheKey = fullName;
}
else if (size == IconSize.ExtraSmall || !IsImage(extension))
{
cacheKey = extension;
}
else
{
cacheKey = fullName;
}
}
BitmapSource source = GetCached(cacheKey, size, () =>
{
BitmapSource img = !isFile || !IsImage(extension) ?
IconExtractor.GetWin32Icon(fullName, size) : IconExtractor.GetImagePreview(fullName, extension, size);
if (img != null)
{
return img;
}
if (isFile)
{
return GetCached("<Fil>", size, GetDefaultFileIcon);
}
else
{
return GetCached("<Dir>", size, GetDefaultFolderIcon);
}
});
if (source != null && source.CanFreeze)
{
source.Freeze();
}
return source;
}
}));
}
