1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#import <Cocoa/Cocoa.h>
6
7#include "base/memory/scoped_nsobject.h"
8
9// A class that handles saving and restoring focus.  An instance of
10// this class snapshots the currently focused view when it is
11// constructed, and callers can use restoreFocus to return focus to
12// that view.  FocusTracker will not restore focus to views that are
13// no longer in the view hierarchy or are not in the correct window.
14
15@interface FocusTracker : NSObject {
16 @private
17  scoped_nsobject<NSView> focusedView_;
18}
19
20// |window| is the window that we are saving focus for.  This
21// method snapshots the currently focused view.
22- (id)initWithWindow:(NSWindow*)window;
23
24// Attempts to restore focus to the snapshotted view.  Returns YES if
25// focus was restored.  Will not restore focus if the view is no
26// longer in the view hierarchy under |window|.
27- (BOOL)restoreFocusInWindow:(NSWindow*)window;
28@end
29