chrome/browser/ui/cocoa/handoff_active_url_observer_bridge.h

   1 // Copyright 2014 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 CHROME_BROWSER_UI_COCOA_HANDOFF_ACTIVE_URL_OBSERVER_BRIDGE_H_
   6 #define CHROME_BROWSER_UI_COCOA_HANDOFF_ACTIVE_URL_OBSERVER_BRIDGE_H_
   7
   8 #import <Cocoa/Cocoa.h>
   9
  10 #include "base/macros.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "chrome/browser/ui/cocoa/handoff_active_url_observer_delegate.h"
  13
  14 namespace content {
  15 class WebContents;
  16 }
  17
  18 class HandoffActiveURLObserver;
  19
  20 // A protocol that allows ObjC objects to receive delegate callbacks from
  21 // HandoffActiveURLObserver.
  22 @protocol HandoffActiveURLObserverBridgeDelegate
  23 - (void)handoffActiveURLChanged:(content::WebContents*)webContents;
  24 @end
  25
  26 // This class allows an ObjC object to receive the delegate callbacks from an
  27 // HandoffActiveURLObserver.
  28 class HandoffActiveURLObserverBridge : public HandoffActiveURLObserverDelegate {
  29  public:
  30   explicit HandoffActiveURLObserverBridge(
  31       NSObject<HandoffActiveURLObserverBridgeDelegate>* delegate);
  32
  33   ~HandoffActiveURLObserverBridge() override;
  34
  35  private:
  36   void HandoffActiveURLChanged(content::WebContents* web_contents) override;
  37
  38   // Instances of this class should be owned by their |delegate_|.
  39   NSObject<HandoffActiveURLObserverBridgeDelegate>* delegate_;
  40
  41   // The C++ object that this class acts as a bridge for.
  42   scoped_ptr<HandoffActiveURLObserver> observer_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(HandoffActiveURLObserverBridge);
  45 };
  46
  47 #endif  // CHROME_BROWSER_UI_COCOA_HANDOFF_ACTIVE_URL_OBSERVER_BRIDGE_H_