ios/chrome/browser/installation_notifier.h

   1 // Copyright 2013 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 #ifndef IOS_CHROME_BROWSER_INSTALLATION_NOTIFIER_H_
   6 #define IOS_CHROME_BROWSER_INSTALLATION_NOTIFIER_H_
   7
   8 #import <Foundation/Foundation.h>
   9
  10 class GURL;
  11
  12 // Protocol used to mock the delayed dispatching for the unit tests.
  13 // Calls |block| after |delayInNSec|.
  14 @protocol DispatcherProtocol<NSObject>
  15 - (void)dispatchAfter:(int64_t)delayInNSec withBlock:(dispatch_block_t)block;
  16 @end
  17
  18 @interface InstallationNotifier : NSObject
  19 // Returns singleton instance.
  20 + (InstallationNotifier*)sharedInstance;
  21
  22 // Registers |observer| to be sent a notification named |scheme| when a URL
  23 // with |scheme| can be opened. |observer| must not be nil. If |scheme| is nil
  24 // or an empty string, |observer| is not registered for anything.
  25 - (void)registerForInstallationNotifications:(id)observer
  26                                 withSelector:(SEL)notificationSelector
  27                                    forScheme:(NSString*)scheme;
  28
  29 // Unregisters all the NSNotifications ever asked by |observer|.
  30 - (void)unregisterForNotifications:(id)observer;
  31
  32 // Performs a check for installed apps right away and restarts the polling.
  33 // There is usually no need for registered observers to call this method, unless
  34 // registered observers need to know the accurate state of installed native
  35 // apps.
  36 - (void)checkNow;
  37 @end
  38
  39 #endif  // IOS_CHROME_BROWSER_INSTALLATION_NOTIFIER_H_