| // 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 COMPONENTS_SEARCH_PROVIDER_LOGOS_LOGO_OBSERVER_H_ |
| #define COMPONENTS_SEARCH_PROVIDER_LOGOS_LOGO_OBSERVER_H_ |
| |
| #include "components/search_provider_logos/logo_common.h" |
| |
| namespace search_provider_logos { |
| |
| // Receives updates when the search provider's logo is available. |
| class LogoObserver { |
| public: |
| virtual ~LogoObserver() {} |
| |
| // Called when the cached logo is available and possibly when a freshly |
| // downloaded logo is available. |logo| will be NULL if no logo is available. |
| // |from_cache| indicates whether the logo was loaded from the cache. |
| // |
| // If the fresh logo is the same as the cached logo, this will not be called |
| // again. |
| virtual void OnLogoAvailable(const Logo* logo, bool from_cache) = 0; |
| |
| // Called when the LogoService will no longer send updates to this |
| // LogoObserver. For example: after the cached logo is validated, after |
| // OnFreshLogoAvailable() is called, or when the LogoService is destructed. |
| // This is not called when an observer is removed using RemoveObserver(). |
| virtual void OnObserverRemoved() = 0; |
| }; |
| |
| } // namespace search_provider_logos |
| |
| #endif // COMPONENTS_SEARCH_PROVIDER_LOGOS_LOGO_OBSERVER_H_ |
