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).
18class PolicySettings {
19 public:
20  enum RendererForUrl {
21    RENDERER_NOT_SPECIFIED = -1,
22    RENDER_IN_HOST,
23    RENDER_IN_CHROME_FRAME,
24  };
25
26  enum SkipMetadataCheck {
27    SKIP_METADATA_CHECK_NOT_SPECIFIED = -1,
28    SKIP_METADATA_CHECK_NO,
29    SKIP_METADATA_CHECK_YES,
30  };
31
32  static PolicySettings* GetInstance();
33
34  RendererForUrl default_renderer() const {
35    return default_renderer_;
36  }
37
38  SkipMetadataCheck skip_metadata_check() const {
39    return skip_metadata_check_;
40  }
41
42  RendererForUrl GetRendererForUrl(const wchar_t* url);
43
44  RendererForUrl GetRendererForContentType(const wchar_t* content_type);
45
46  // Returns the policy-configured Chrome app locale, or an empty string if none
47  // is configured.
48  const std::wstring& ApplicationLocale() const {
49    return application_locale_;
50  }
51
52  // Contains additional parameters that can optionally be configured for the
53  // current user via the policy settings.  The program part of this command
54  // line object must not be used when appending to another command line.
55  const CommandLine& AdditionalLaunchParameters() const;
56
57  // Returns true if the Chrome Frame turndown prompt should be suppressed.
58  bool suppress_turndown_prompt() const {
59    return suppress_turndown_prompt_;
60  }
61
62  // Helper functions for reading settings from the registry
63  static void ReadUrlSettings(RendererForUrl* default_renderer,
64      std::vector<std::wstring>* renderer_exclusion_list);
65  static void ReadMetadataCheckSettings(SkipMetadataCheck* skip_metadata_check);
66  static void ReadContentTypeSetting(
67      std::vector<std::wstring>* content_type_list);
68  static void ReadStringSetting(const char* value_name, std::wstring* value);
69  static void ReadBoolSetting(const char* value_name, bool* value);
70
71 protected:
72  PolicySettings()
73      : default_renderer_(RENDERER_NOT_SPECIFIED),
74        skip_metadata_check_(SKIP_METADATA_CHECK_NOT_SPECIFIED),
75        additional_launch_parameters_(CommandLine::NO_PROGRAM),
76        suppress_turndown_prompt_(false) {
77    RefreshFromRegistry();
78  }
79
80  ~PolicySettings() {
81  }
82
83  // Protected for now since the class is not thread safe.
84  void RefreshFromRegistry();
85
86 protected:
87  RendererForUrl default_renderer_;
88  SkipMetadataCheck skip_metadata_check_;
89  std::vector<std::wstring> renderer_exclusion_list_;
90  std::vector<std::wstring> content_type_list_;
91  std::wstring application_locale_;
92  CommandLine additional_launch_parameters_;
93  bool suppress_turndown_prompt_;
94
95 private:
96  // This ensures no construction is possible outside of the class itself.
97  friend struct DefaultSingletonTraits<PolicySettings>;
98  DISALLOW_COPY_AND_ASSIGN(PolicySettings);
99};
100
101#endif  // CHROME_FRAME_POLICY_SETTINGS_H_
102