/// <summary>
/// Given a native KnownFolder (IKnownFolderNative), create the right type of
/// IKnownFolder object (FileSystemKnownFolder or NonFileSystemKnownFolder)
/// </summary>
/// <param name="knownFolderNative">Native Known Folder</param>
/// <returns></returns>
private static IKnownFolder GetKnownFolder(IKnownFolderNative knownFolderNative)
{
Debug.Assert(knownFolderNative != null, "Native IKnownFolder should not be null.");
// Get the native IShellItem2 from the native IKnownFolder
IShellItem2 shellItem;
Guid guid = new Guid(ShellIIDGuid.IShellItem2);
HResult hr = knownFolderNative.GetShellItem(0, ref guid, out shellItem);
if (!CoreErrorHelper.Succeeded(hr))
{
return(null);
}
bool isFileSystem = false;
// If we have a valid IShellItem, try to get the FileSystem attribute.
if (shellItem != null)
{
ShellNativeMethods.ShellFileGetAttributesOptions sfgao;
shellItem.GetAttributes(ShellNativeMethods.ShellFileGetAttributesOptions.FileSystem, out sfgao);
// Is this item a FileSystem item?
isFileSystem = (sfgao & ShellNativeMethods.ShellFileGetAttributesOptions.FileSystem) != 0;
}
// If it's FileSystem, create a FileSystemKnownFolder, else NonFileSystemKnownFolder
if (isFileSystem)
{
FileSystemKnownFolder kf = new FileSystemKnownFolder(knownFolderNative);
return(kf);
}
NonFileSystemKnownFolder knownFsFolder = new NonFileSystemKnownFolder(knownFolderNative);
return(knownFsFolder);
}
/// <summary>
/// Creates a ShellObject given a native IShellItem interface
/// </summary>
/// <param name="nativeShellItem"></param>
/// <returns>A newly constructed ShellObject object</returns>
internal static ShellObject Create(IShellItem nativeShellItem)
{
// Sanity check
Debug.Assert(nativeShellItem != null, "nativeShellItem should not be null");
// Need to make sure we're running on Vista or higher
if (!CoreHelpers.RunningOnVista)
{
throw new PlatformNotSupportedException(LocalizedMessages.ShellObjectFactoryPlatformNotSupported);
}
// A lot of APIs need IShellItem2, so just keep a copy of it here
IShellItem2 nativeShellItem2 = nativeShellItem as IShellItem2;
// Get the System.ItemType property
string itemType = ShellHelper.GetItemType(nativeShellItem2);
if (!string.IsNullOrEmpty(itemType))
{
itemType = itemType.ToUpperInvariant();
}
// Get some IShellItem attributes
ShellNativeMethods.ShellFileGetAttributesOptions sfgao;
nativeShellItem2.GetAttributes(ShellNativeMethods.ShellFileGetAttributesOptions.FileSystem | ShellNativeMethods.ShellFileGetAttributesOptions.Folder, out sfgao);
// Is this item a FileSystem item?
bool isFileSystem = (sfgao & ShellNativeMethods.ShellFileGetAttributesOptions.FileSystem) != 0;
// Is this item a Folder?
bool isFolder = (sfgao & ShellNativeMethods.ShellFileGetAttributesOptions.Folder) != 0;
// Shell Library
ShellLibrary shellLibrary = null;
// Create the right type of ShellObject based on the above information
// 1. First check if this is a Shell Link
if (itemType == ".lnk")
{
return(new ShellLink(nativeShellItem2));
}
// 2. Check if this is a container or a single item (entity)
else if (isFolder)
{
// 3. If this is a folder, check for types: Shell Library, Shell Folder or Search Container
if (itemType == ".library-ms" && (shellLibrary = ShellLibrary.FromShellItem(nativeShellItem2, true)) != null)
{
return(shellLibrary); // we already created this above while checking for Library
}
else if (itemType == ".searchconnector-ms")
{
return(new ShellSearchConnector(nativeShellItem2));
}
else if (itemType == ".search-ms")
{
return(new ShellSavedSearchCollection(nativeShellItem2));
}
// 4. It's a ShellFolder
if (isFileSystem)
{
// 5. Is it a (File-System / Non-Virtual) Known Folder
if (!IsVirtualKnownFolder(nativeShellItem2))
{ //needs to check if it is a known folder and not virtual
FileSystemKnownFolder kf = new FileSystemKnownFolder(nativeShellItem2);
return(kf);
}
return(new ShellFileSystemFolder(nativeShellItem2));
}
// 5. Is it a (Non File-System / Virtual) Known Folder
if (IsVirtualKnownFolder(nativeShellItem2))
{ //needs to check if known folder is virtual
NonFileSystemKnownFolder kf = new NonFileSystemKnownFolder(nativeShellItem2);
return(kf);
}
return(new ShellNonFileSystemFolder(nativeShellItem2));
}
// 6. If this is an entity (single item), check if its filesystem or not
if (isFileSystem)
{
return(new ShellFile(nativeShellItem2));
}
return(new ShellNonFileSystemItem(nativeShellItem2));
}