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      1 // Copyright (c) 2012 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_EXTENSIONS_API_SYSTEM_INDICATOR_SYSTEM_INDICATOR_MANAGER_H_
      6 #define CHROME_BROWSER_EXTENSIONS_API_SYSTEM_INDICATOR_SYSTEM_INDICATOR_MANAGER_H_
      7 
      8 #include <map>
      9 #include <string>
     10 
     11 #include "base/memory/linked_ptr.h"
     12 #include "base/scoped_observer.h"
     13 #include "base/threading/thread_checker.h"
     14 #include "chrome/browser/extensions/extension_action_icon_factory.h"
     15 #include "components/keyed_service/core/keyed_service.h"
     16 #include "content/public/browser/notification_observer.h"
     17 #include "content/public/browser/notification_registrar.h"
     18 #include "extensions/browser/extension_registry_observer.h"
     19 
     20 class ExtensionAction;
     21 class Profile;
     22 class StatusTray;
     23 
     24 FORWARD_DECLARE_TEST(SystemIndicatorApiTest, SystemIndicator);
     25 
     26 namespace extensions {
     27 class ExtensionIndicatorIcon;
     28 class ExtensionRegistry;
     29 
     30 // Keeps track of all the systemIndicator icons created for a given Profile
     31 // that are currently visible in the UI.  Use SystemIndicatorManagerFactory to
     32 // create a SystemIndicatorManager object.
     33 class SystemIndicatorManager : public content::NotificationObserver,
     34                                public ExtensionRegistryObserver,
     35                                public KeyedService {
     36  public:
     37   SystemIndicatorManager(Profile* profile, StatusTray* status_tray);
     38   virtual ~SystemIndicatorManager();
     39 
     40   // KeyedService implementation.
     41   virtual void Shutdown() OVERRIDE;
     42 
     43  private:
     44   FRIEND_TEST_ALL_PREFIXES(::SystemIndicatorApiTest, SystemIndicator);
     45 
     46   // content::NotificationDelegate implementation.
     47   virtual void Observe(int type,
     48                        const content::NotificationSource& source,
     49                        const content::NotificationDetails& details) OVERRIDE;
     50 
     51   // ExtensionRegistryObserver implementation.
     52   virtual void OnExtensionUnloaded(
     53       content::BrowserContext* browser_context,
     54       const Extension* extension,
     55       UnloadedExtensionInfo::Reason reason) OVERRIDE;
     56 
     57   // Determines whether the indicator should be hidden or shown and calls the
     58   // appropriate function.
     59   void OnSystemIndicatorChanged(const ExtensionAction* extension_action);
     60 
     61   // Causes a call to OnStatusIconClicked for the specified extension_id.
     62   // Returns false if no ExtensionIndicatorIcon is found for the extension.
     63   bool SendClickEventToExtensionForTest(const std::string extension_id);
     64 
     65   // Causes an indicator to be shown for the given extension_action.  Creates
     66   // the indicator if necessary.
     67   void CreateOrUpdateIndicator(
     68       const Extension* extension,
     69       const ExtensionAction* extension_action);
     70 
     71   // Causes the indicator for the given extension to be hidden.
     72   void RemoveIndicator(const std::string &extension_id);
     73 
     74   typedef std::map<const std::string, linked_ptr<ExtensionIndicatorIcon> >
     75       SystemIndicatorMap;
     76 
     77   Profile* profile_;
     78   StatusTray* status_tray_;
     79   SystemIndicatorMap system_indicators_;
     80   content::NotificationRegistrar registrar_;
     81   base::ThreadChecker thread_checker_;
     82 
     83   // Listen to extension unloaded notifications.
     84   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
     85       extension_registry_observer_;
     86 
     87   DISALLOW_COPY_AND_ASSIGN(SystemIndicatorManager);
     88 };
     89 
     90 }  // namespace extensions
     91 
     92 #endif  // CHROME_BROWSER_EXTENSIONS_API_SYSTEM_INDICATOR_SYSTEM_INDICATOR_MANAGER_H_
     93