ios/web/navigation/navigation_manager_facade_delegate.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 IOS_WEB_NAVIGATION_NAVIGATION_MANAGER_FACADE_DELEGATE_H_
   6 #define IOS_WEB_NAVIGATION_NAVIGATION_MANAGER_FACADE_DELEGATE_H_
   7
   8 namespace content {
   9 class NavigationController;
  10 }
  11
  12 namespace web {
  13
  14 class NavigationItemImpl;
  15 class NavigationManagerImpl;
  16
  17 // Interface used by the NavigationManager to drive the NavigationController
  18 // facade. This pushes the ownership of the facade out of the web-layer to
  19 // simplify upstreaming efforts.  Once upstream features are componentized and
  20 // use NavigationManager, this class will no longer be necessary.
  21 class NavigationManagerFacadeDelegate {
  22  public:
  23   NavigationManagerFacadeDelegate() {}
  24   virtual ~NavigationManagerFacadeDelegate() {}
  25
  26   // Sets the NavigationManagerImpl that backs the NavigationController facade.
  27   virtual void SetNavigationManager(
  28       NavigationManagerImpl* navigation_manager) = 0;
  29   // Returns the facade object being driven by this delegate.
  30   virtual content::NavigationController* GetNavigationControllerFacade() = 0;
  31
  32   // Callbacks for triggering notifications:
  33
  34   // Called when the NavigationManager has a pending NavigationItem.
  35   virtual void OnNavigationItemPending() = 0;
  36   // Called when the NavigationManager has updated a NavigationItem.
  37   virtual void OnNavigationItemChanged() = 0;
  38   // Called when the NavigationManager has committed a pending NavigationItem.
  39   virtual void OnNavigationItemCommitted(int previous_item_index,
  40                                          bool is_in_page) = 0;
  41   // Called when the NavigationManager has pruned committed NavigationItems.
  42   virtual void OnNavigationItemsPruned(size_t pruned_item_count) = 0;
  43 };
  44
  45 }  // namespace web
  46
  47 #endif  // IOS_WEB_NAVIGATION_NAVIGATION_MANAGER_FACADE_DELEGATE_H_