chrome/browser/sessions/restore_on_startup_policy_handler.cc

   1 // Copyright 2013 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 #include "chrome/browser/sessions/restore_on_startup_policy_handler.h"
   6
   7 #include "base/prefs/pref_value_map.h"
   8 #include "base/strings/string_number_conversions.h"
   9 #include "base/values.h"
  10 #include "chrome/browser/prefs/session_startup_pref.h"
  11 #include "chrome/common/pref_names.h"
  12 #include "components/policy/core/browser/policy_error_map.h"
  13 #include "components/policy/core/common/policy_map.h"
  14 #include "grit/components_strings.h"
  15 #include "policy/policy_constants.h"
  16
  17 namespace policy {
  18
  19 RestoreOnStartupPolicyHandler::RestoreOnStartupPolicyHandler()
  20     : TypeCheckingPolicyHandler(key::kRestoreOnStartup,
  21                                 base::Value::TYPE_INTEGER) {}
  22
  23 RestoreOnStartupPolicyHandler::~RestoreOnStartupPolicyHandler() {
  24 }
  25
  26 void RestoreOnStartupPolicyHandler::ApplyPolicySettings(
  27     const PolicyMap& policies,
  28     PrefValueMap* prefs) {
  29   const base::Value* restore_on_startup_value =
  30       policies.GetValue(policy_name());
  31   if (restore_on_startup_value) {
  32     int restore_on_startup;
  33     if (!restore_on_startup_value->GetAsInteger(&restore_on_startup))
  34       return;
  35
  36     if (restore_on_startup == SessionStartupPref::kPrefValueHomePage)
  37       ApplyPolicySettingsFromHomePage(policies, prefs);
  38     else
  39       prefs->SetInteger(prefs::kRestoreOnStartup, restore_on_startup);
  40   }
  41 }
  42
  43 void RestoreOnStartupPolicyHandler::ApplyPolicySettingsFromHomePage(
  44     const PolicyMap& policies,
  45     PrefValueMap* prefs) {
  46   const base::Value* homepage_is_new_tab_page_value =
  47       policies.GetValue(key::kHomepageIsNewTabPage);
  48   if (!homepage_is_new_tab_page_value) {
  49     // The policy is enforcing 'open the homepage on startup' but not
  50     // enforcing what the homepage should be. Don't set any prefs.
  51     return;
  52   }
  53
  54   bool homepage_is_new_tab_page;
  55   if (!homepage_is_new_tab_page_value->GetAsBoolean(&homepage_is_new_tab_page))
  56     return;
  57
  58   if (homepage_is_new_tab_page) {
  59     prefs->SetInteger(prefs::kRestoreOnStartup,
  60                       SessionStartupPref::kPrefValueNewTab);
  61   } else {
  62     const base::Value* homepage_value =
  63         policies.GetValue(key::kHomepageLocation);
  64     if (!homepage_value || !homepage_value->IsType(base::Value::TYPE_STRING)) {
  65       // The policy is enforcing 'open the homepage on startup' but not
  66       // enforcing what the homepage should be. Don't set any prefs.
  67       return;
  68     }
  69     base::ListValue* url_list = new base::ListValue();
  70     url_list->Append(homepage_value->DeepCopy());
  71     prefs->SetInteger(prefs::kRestoreOnStartup,
  72                       SessionStartupPref::kPrefValueURLs);
  73     prefs->SetValue(prefs::kURLsToRestoreOnStartup, url_list);
  74   }
  75 }
  76
  77 bool RestoreOnStartupPolicyHandler::CheckPolicySettings(
  78     const PolicyMap& policies,
  79     PolicyErrorMap* errors) {
  80   if (!TypeCheckingPolicyHandler::CheckPolicySettings(policies, errors))
  81     return false;
  82
  83   const base::Value* restore_policy = policies.GetValue(key::kRestoreOnStartup);
  84
  85   if (restore_policy) {
  86     int restore_value;
  87     CHECK(restore_policy->GetAsInteger(&restore_value));  // Passed type check.
  88     switch (restore_value) {
  89       case SessionStartupPref::kPrefValueHomePage:
  90         errors->AddError(policy_name(), IDS_POLICY_VALUE_DEPRECATED);
  91         break;
  92       case SessionStartupPref::kPrefValueLast: {
  93         // If the "restore last session" policy is set, session cookies are
  94         // treated as permanent cookies and site data needed to restore the
  95         // session is not cleared so we have to warn the user in that case.
  96         const base::Value* cookies_policy =
  97             policies.GetValue(key::kCookiesSessionOnlyForUrls);
  98         const base::ListValue* cookies_value;
  99         if (cookies_policy && cookies_policy->GetAsList(&cookies_value) &&
 100             !cookies_value->empty()) {
 101           errors->AddError(key::kCookiesSessionOnlyForUrls,
 102                            IDS_POLICY_OVERRIDDEN,
 103                            key::kRestoreOnStartup);
 104         }
 105
 106         const base::Value* exit_policy =
 107             policies.GetValue(key::kClearSiteDataOnExit);
 108         bool exit_value;
 109         if (exit_policy && exit_policy->GetAsBoolean(&exit_value) &&
 110             exit_value) {
 111           errors->AddError(key::kClearSiteDataOnExit,
 112                            IDS_POLICY_OVERRIDDEN,
 113                            key::kRestoreOnStartup);
 114         }
 115         break;
 116       }
 117       case SessionStartupPref::kPrefValueURLs:
 118       case SessionStartupPref::kPrefValueNewTab:
 119         // No error
 120         break;
 121       default:
 122         errors->AddError(policy_name(),
 123                          IDS_POLICY_OUT_OF_RANGE_ERROR,
 124                          base::IntToString(restore_value));
 125     }
 126   }
 127   return true;
 128 }
 129
 130 }  // namespace policy