chrome_frame/policy_settings.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_FRAME_POLICY_SETTINGS_H_
   6 #define CHROME_FRAME_POLICY_SETTINGS_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/command_line.h"
  13 #include "base/memory/singleton.h"
  14
  15 // A simple class that reads and caches policy settings for Chrome Frame.
  16 // TODO(tommi): Support refreshing when new settings are pushed.
  17 // TODO(tommi): Use Chrome's classes for this (and the notification service).
  18 class PolicySettings {
  19  public:
  20   typedef enum RendererForUrl {
  21     RENDERER_NOT_SPECIFIED = -1,
  22     RENDER_IN_HOST,
  23     RENDER_IN_CHROME_FRAME,
  24   };
  25
  26   static PolicySettings* GetInstance();
  27
  28   RendererForUrl default_renderer() const {
  29     return default_renderer_;
  30   }
  31
  32   RendererForUrl GetRendererForUrl(const wchar_t* url);
  33
  34   RendererForUrl GetRendererForContentType(const wchar_t* content_type);
  35
  36   // Returns the policy-configured Chrome app locale, or an empty string if none
  37   // is configured.
  38   const std::wstring& ApplicationLocale() const {
  39     return application_locale_;
  40   }
  41
  42   // Contains additional parameters that can optionally be configured for the
  43   // current user via the policy settings.  The program part of this command
  44   // line object must not be used when appending to another command line.
  45   const CommandLine& AdditionalLaunchParameters() const;
  46
  47   // Helper functions for reading settings from the registry
  48   static void ReadUrlSettings(RendererForUrl* default_renderer,
  49       std::vector<std::wstring>* renderer_exclusion_list);
  50   static void ReadContentTypeSetting(
  51       std::vector<std::wstring>* content_type_list);
  52   static void ReadStringSetting(const char* value_name, std::wstring* value);
  53
  54  protected:
  55   PolicySettings()
  56       : default_renderer_(RENDERER_NOT_SPECIFIED),
  57         additional_launch_parameters_(CommandLine::NO_PROGRAM) {
  58     RefreshFromRegistry();
  59   }
  60
  61   ~PolicySettings() {
  62   }
  63
  64   // Protected for now since the class is not thread safe.
  65   void RefreshFromRegistry();
  66
  67  protected:
  68   RendererForUrl default_renderer_;
  69   std::vector<std::wstring> renderer_exclusion_list_;
  70   std::vector<std::wstring> content_type_list_;
  71   std::wstring application_locale_;
  72   CommandLine additional_launch_parameters_;
  73
  74  private:
  75   // This ensures no construction is possible outside of the class itself.
  76   friend struct DefaultSingletonTraits<PolicySettings>;
  77   DISALLOW_COPY_AND_ASSIGN(PolicySettings);
  78 };
  79
  80 #endif  // CHROME_FRAME_POLICY_SETTINGS_H_