components/favicon/core/favicon_driver_observer.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 COMPONENTS_FAVICON_CORE_FAVICON_DRIVER_OBSERVER_H_
   6 #define COMPONENTS_FAVICON_CORE_FAVICON_DRIVER_OBSERVER_H_
   7
   8 #include "base/macros.h"
   9
  10 namespace gfx {
  11 class Image;
  12 }
  13
  14 namespace favicon {
  15
  16 class FaviconDriver;
  17
  18 // An observer implemented by classes which are interested in event from
  19 // FaviconDriver.
  20 class FaviconDriverObserver {
  21  public:
  22   FaviconDriverObserver() {}
  23   virtual ~FaviconDriverObserver() {}
  24
  25   // Called when favicon |image| is retrieved from either web site or cached
  26   // storage.
  27   virtual void OnFaviconAvailable(const gfx::Image& image) = 0;
  28
  29   // Called when favicon has changed for the current page. |icon_url_changed| is
  30   // true if the favicon URL has also changed.
  31   virtual void OnFaviconUpdated(FaviconDriver* favicon_driver,
  32                                 bool icon_url_changed) = 0;
  33
  34  private:
  35   DISALLOW_COPY_AND_ASSIGN(FaviconDriverObserver);
  36 };
  37
  38 }  // namespace favicon
  39
  40 #endif  // COMPONENTS_FAVICON_CORE_FAVICON_DRIVER_OBSERVER_H_