Add missing file.

Source/NSFileWrapperExtensions.m

@@ -0,0 +1,58 @@
+/** <title>NSFileWrapper</title>
+
+   <abstract>Hold a file's contents in dynamic memory.</abstract>
+
+   Copyright (C) 1996 Free Software Foundation, Inc.
+
+   Author: Felipe A. Rodriguez <far@ix.netcom.com>
+   Date: Sept 1998
+   Author: Jonathan Gapen <jagapen@whitewater.chem.wisc.edu>
+   Date: Dec 1999
+   
+   This file is part of the GNUstep GUI Library.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; see the file COPYING.LIB.
+   If not, see <http://www.gnu.org/licenses/> or write to the 
+   Free Software Foundation, 51 Franklin Street, Fifth Floor, 
+   Boston, MA 02110-1301, USA.
+*/ 
+
+#include "config.h"
+
+#import <AppKit/NSFileWrapper.h>
+#import <AppKit/NSFileWrapperExtensions.h>
+#import "AppKit/NSImage.h"
+#import "AppKit/NSWorkspace.h"
+
+@implementation NSFileWrapper (NSExtensions)
+
+- (void) setIcon: (NSImage*)icon
+{
+  ASSIGN(_icon, icon);
+}
+
+- (NSImage*) icon
+{
+  if (_icon == nil && [self filename])
+    {
+      return [[NSWorkspace sharedWorkspace] iconForFile: [self filename]];
+    }
+  else
+    {
+      return (NSImage *)_icon;
+    }
+}
+
+@end
+