chrome/browser/extensions/extension_warning_service.h

   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_EXTENSION_WARNING_SERVICE_H_
   6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_WARNING_SERVICE_H_
   7
   8 #include <set>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/observer_list.h"
  13 #include "base/scoped_observer.h"
  14 #include "base/threading/non_thread_safe.h"
  15 #include "chrome/browser/extensions/extension_warning_set.h"
  16 #include "extensions/browser/extension_registry_observer.h"
  17
  18 // TODO(battre) Remove the Extension prefix.
  19
  20 class Profile;
  21
  22 namespace content {
  23 class NotificationDetails;
  24 class NotificationSource;
  25 }
  26
  27 namespace extensions {
  28
  29 class ExtensionRegistry;
  30
  31 // Manages a set of warnings caused by extensions. These warnings (e.g.
  32 // conflicting modifications of network requests by extensions, slow extensions,
  33 // etc.) trigger a warning badge in the UI and and provide means to resolve
  34 // them. This class must be used on the UI thread only.
  35 class ExtensionWarningService : public ExtensionRegistryObserver,
  36                                 public base::NonThreadSafe {
  37  public:
  38   class Observer {
  39    public:
  40     virtual void ExtensionWarningsChanged() = 0;
  41   };
  42
  43   // |profile| may be NULL for testing. In this case, be sure to not insert
  44   // any warnings.
  45   explicit ExtensionWarningService(Profile* profile);
  46   virtual ~ExtensionWarningService();
  47
  48   // Clears all warnings of types contained in |types| and notifies observers
  49   // of the changed warnings.
  50   void ClearWarnings(const std::set<ExtensionWarning::WarningType>& types);
  51
  52   // Returns all types of warnings effecting extension |extension_id|.
  53   std::set<ExtensionWarning::WarningType> GetWarningTypesAffectingExtension(
  54       const std::string& extension_id) const;
  55
  56   // Returns all localized warnings for extension |extension_id| in |result|.
  57   std::vector<std::string> GetWarningMessagesForExtension(
  58       const std::string& extension_id) const;
  59
  60   const ExtensionWarningSet& warnings() const { return warnings_; }
  61
  62   // Adds a set of warnings and notifies observers if any warning is new.
  63   void AddWarnings(const ExtensionWarningSet& warnings);
  64
  65   // Notifies the ExtensionWarningService of profile |profile_id| that new
  66   // |warnings| occurred and triggers a warning badge.
  67   static void NotifyWarningsOnUI(void* profile_id,
  68                                  const ExtensionWarningSet& warnings);
  69
  70   void AddObserver(Observer* observer);
  71   void RemoveObserver(Observer* observer);
  72
  73  private:
  74   void NotifyWarningsChanged();
  75
  76   // ExtensionRegistryObserver implementation.
  77   virtual void OnExtensionUnloaded(content::BrowserContext* browser_context,
  78                                    const Extension* extension,
  79                                    UnloadedExtensionInfo::Reason reason)
  80       OVERRIDE;
  81
  82   // Currently existing warnings.
  83   ExtensionWarningSet warnings_;
  84
  85   Profile* profile_;
  86
  87   // Listen to extension unloaded notifications.
  88   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
  89       extension_registry_observer_;
  90
  91   ObserverList<Observer> observer_list_;
  92 };
  93
  94 }  // namespace extensions
  95
  96 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WARNING_SERVICE_H_