chrome_frame/policy_settings.h

   1 // Copyright (c) 2011 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_FRAME_POLICY_SETTINGS_H_
   6 #define CHROME_FRAME_POLICY_SETTINGS_H_
   7
   8 #include <string>
   9 #include <vector>
  10 #include "base/memory/singleton.h"
  11
  12 #include "base/basictypes.h"
  13
  14 // A simple class that reads and caches policy settings for Chrome Frame.
  15 // TODO(tommi): Support refreshing when new settings are pushed.
  16 // TODO(tommi): Use Chrome's classes for this (and the notification service).
  17 class PolicySettings {
  18  public:
  19   typedef enum RendererForUrl {
  20     RENDERER_NOT_SPECIFIED = -1,
  21     RENDER_IN_HOST,
  22     RENDER_IN_CHROME_FRAME,
  23   };
  24
  25   static PolicySettings* GetInstance();
  26
  27   RendererForUrl default_renderer() const {
  28     return default_renderer_;
  29   }
  30
  31   RendererForUrl GetRendererForUrl(const wchar_t* url);
  32
  33   RendererForUrl GetRendererForContentType(const wchar_t* content_type);
  34
  35   // Returns the policy-configured Chrome app locale, or an empty string if none
  36   // is configured.
  37   const std::wstring& ApplicationLocale() const {
  38     return application_locale_;
  39   }
  40
  41   // Helper functions for reading settings from the registry
  42   static void ReadUrlSettings(RendererForUrl* default_renderer,
  43       std::vector<std::wstring>* renderer_exclusion_list);
  44   static void ReadContentTypeSetting(
  45       std::vector<std::wstring>* content_type_list);
  46   static void ReadApplicationLocaleSetting(std::wstring* application_locale);
  47
  48  protected:
  49   PolicySettings() : default_renderer_(RENDERER_NOT_SPECIFIED) {
  50     RefreshFromRegistry();
  51   }
  52
  53   ~PolicySettings() {
  54   }
  55
  56   // Protected for now since the class is not thread safe.
  57   void RefreshFromRegistry();
  58
  59  protected:
  60   RendererForUrl default_renderer_;
  61   std::vector<std::wstring> renderer_exclusion_list_;
  62   std::vector<std::wstring> content_type_list_;
  63   std::wstring application_locale_;
  64
  65  private:
  66   // This ensures no construction is possible outside of the class itself.
  67   friend struct DefaultSingletonTraits<PolicySettings>;
  68   DISALLOW_COPY_AND_ASSIGN(PolicySettings);
  69 };
  70
  71 #endif  // CHROME_FRAME_POLICY_SETTINGS_H_