chrome/browser/extensions/external_policy_loader.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_EXTERNAL_POLICY_LOADER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_EXTERNAL_POLICY_LOADER_H_
   7
   8 #include <string>
   9
  10 #include "base/compiler_specific.h"
  11 #include "chrome/browser/extensions/extension_management.h"
  12 #include "chrome/browser/extensions/external_loader.h"
  13
  14 namespace base {
  15 class DictionaryValue;
  16 }
  17
  18 namespace extensions {
  19
  20 // A specialization of the ExternalProvider that uses extension management
  21 // policies to look up which external extensions are registered.
  22 class ExternalPolicyLoader : public ExternalLoader,
  23                              public ExtensionManagement::Observer {
  24  public:
  25   // Indicates the policies for installed extensions from this class, according
  26   // to management polices.
  27   enum InstallationType {
  28     // Installed extensions are not allowed to be disabled or removed.
  29     FORCED,
  30     // Installed extensions are allowed to be disabled but not removed.
  31     RECOMMENDED
  32   };
  33
  34   ExternalPolicyLoader(ExtensionManagement* settings, InstallationType type);
  35
  36   // ExtensionManagement::Observer implementation
  37   void OnExtensionManagementSettingsChanged() override;
  38
  39   // Adds an extension to be updated to the pref dictionary.
  40   static void AddExtension(base::DictionaryValue* dict,
  41                            const std::string& extension_id,
  42                            const std::string& update_url);
  43
  44  protected:
  45   void StartLoading() override;
  46
  47  private:
  48   friend class base::RefCountedThreadSafe<ExternalLoader>;
  49
  50   ~ExternalPolicyLoader() override;
  51
  52   ExtensionManagement* settings_;
  53   InstallationType type_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(ExternalPolicyLoader);
  56 };
  57
  58 }  // namespace extensions
  59
  60 #endif  // CHROME_BROWSER_EXTENSIONS_EXTERNAL_POLICY_LOADER_H_