components/dom_distiller/core/dom_distiller_observer.h

   1 // Copyright 2013 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_DOM_DISTILLER_CORE_DOM_DISTILLER_OBSERVER_H_
   6 #define COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_OBSERVER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "components/dom_distiller/core/article_entry.h"
  12
  13 namespace dom_distiller {
  14
  15 // Provides notifications for any mutations to entries of the reading list.
  16 class DomDistillerObserver {
  17  public:
  18   // An update to an article entry.
  19   struct ArticleUpdate {
  20     enum UpdateType {
  21       ADD,
  22       UPDATE,
  23       REMOVE
  24     };
  25     std::string entry_id;
  26     UpdateType update_type;
  27   };
  28
  29   virtual void ArticleEntriesUpdated(
  30       const std::vector<ArticleUpdate>& updates) = 0;
  31
  32  protected:
  33   DomDistillerObserver() {}
  34   virtual ~DomDistillerObserver() {}
  35
  36  private:
  37   DISALLOW_COPY_AND_ASSIGN(DomDistillerObserver);
  38 };
  39
  40 }  // namespace dom_distiller
  41
  42 #endif  // COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_OBSERVER_H_