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      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 CHROME_BROWSER_UI_APP_LIST_RECOMMENDED_APPS_H_
      6 #define CHROME_BROWSER_UI_APP_LIST_RECOMMENDED_APPS_H_
      7 
      8 #include <vector>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/memory/ref_counted.h"
     12 #include "base/observer_list.h"
     13 #include "base/prefs/pref_change_registrar.h"
     14 #include "base/scoped_observer.h"
     15 #include "extensions/browser/extension_registry_observer.h"
     16 
     17 class Profile;
     18 
     19 namespace extensions {
     20 class ExtensionRegistry;
     21 }
     22 
     23 namespace app_list {
     24 
     25 class RecommendedAppsObserver;
     26 
     27 // A class that maintains a list of recommended apps by watching changes
     28 // to app state.
     29 class RecommendedApps : public extensions::ExtensionRegistryObserver {
     30  public:
     31   typedef std::vector<scoped_refptr<const extensions::Extension> > Apps;
     32 
     33   explicit RecommendedApps(Profile* profile);
     34   virtual ~RecommendedApps();
     35 
     36   void AddObserver(RecommendedAppsObserver* observer);
     37   void RemoveObserver(RecommendedAppsObserver* observer);
     38 
     39   const Apps& apps() const { return apps_; }
     40 
     41  private:
     42   void Update();
     43 
     44   // extensions::ExtensionRegistryObserver overrides:
     45   virtual void OnExtensionWillBeInstalled(
     46       content::BrowserContext* browser_context,
     47       const extensions::Extension* extension,
     48       bool is_update,
     49       bool from_ephemeral,
     50       const std::string& old_name) OVERRIDE;
     51   virtual void OnExtensionLoaded(
     52       content::BrowserContext* browser_context,
     53       const extensions::Extension* extension) OVERRIDE;
     54   virtual void OnExtensionUnloaded(
     55       content::BrowserContext* browser_context,
     56       const extensions::Extension* extension,
     57       extensions::UnloadedExtensionInfo::Reason reason) OVERRIDE;
     58   virtual void OnExtensionUninstalled(
     59       content::BrowserContext* browser_context,
     60       const extensions::Extension* extension) OVERRIDE;
     61 
     62   Profile* profile_;
     63   PrefChangeRegistrar pref_change_registrar_;
     64 
     65   Apps apps_;
     66   ObserverList<RecommendedAppsObserver, true> observers_;
     67 
     68   ScopedObserver<extensions::ExtensionRegistry,
     69                  extensions::ExtensionRegistryObserver>
     70       extension_registry_observer_;
     71 
     72   DISALLOW_COPY_AND_ASSIGN(RecommendedApps);
     73 };
     74 
     75 }  // namespace app_list
     76 
     77 #endif  // CHROME_BROWSER_UI_APP_LIST_RECOMMENDED_APPS_H_
     78