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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef IOS_WEB_NAVIGATION_NAVIGATION_MANAGER_FACADE_DELEGATE_H_
#define IOS_WEB_NAVIGATION_NAVIGATION_MANAGER_FACADE_DELEGATE_H_
namespace content {
class NavigationController;
}
namespace web {
class NavigationItemImpl;
class NavigationManagerImpl;
// Interface used by the NavigationManager to drive the NavigationController
// facade. This pushes the ownership of the facade out of the web-layer to
// simplify upstreaming efforts. Once upstream features are componentized and
// use NavigationManager, this class will no longer be necessary.
class NavigationManagerFacadeDelegate {
public:
NavigationManagerFacadeDelegate() {}
virtual ~NavigationManagerFacadeDelegate() {}
// Sets the NavigationManagerImpl that backs the NavigationController facade.
virtual void SetNavigationManager(
NavigationManagerImpl* navigation_manager) = 0;
// Returns the facade object being driven by this delegate.
virtual content::NavigationController* GetNavigationControllerFacade() = 0;
// Callbacks for triggering notifications:
// Called when the NavigationManager has a pending NavigationItem.
virtual void OnNavigationItemPending() = 0;
// Called when the NavigationManager has updated a NavigationItem.
virtual void OnNavigationItemChanged() = 0;
// Called when the NavigationManager has committed a pending NavigationItem.
virtual void OnNavigationItemCommitted(int previous_item_index,
bool is_in_page) = 0;
// Called when the NavigationManager has pruned committed NavigationItems.
virtual void OnNavigationItemsPruned(size_t pruned_item_count) = 0;
};
} // namespace web
#endif // IOS_WEB_NAVIGATION_NAVIGATION_MANAGER_FACADE_DELEGATE_H_
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