chrome/browser/ui/webui/chromeos/set_time_ui.cc

   1 // Copyright 2014 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/ui/webui/chromeos/set_time_ui.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/build_time.h"
  10 #include "base/values.h"
  11 #include "chrome/browser/chromeos/settings/cros_settings.h"
  12 #include "chrome/browser/chromeos/system/timezone_util.h"
  13 #include "chrome/browser/profiles/profile.h"
  14 #include "chrome/common/url_constants.h"
  15 #include "chrome/grit/generated_resources.h"
  16 #include "chromeos/dbus/dbus_thread_manager.h"
  17 #include "chromeos/dbus/system_clock_client.h"
  18 #include "chromeos/login/login_state.h"
  19 #include "chromeos/settings/timezone_settings.h"
  20 #include "content/public/browser/web_ui.h"
  21 #include "content/public/browser/web_ui_data_source.h"
  22 #include "content/public/browser/web_ui_message_handler.h"
  23 #include "grit/browser_resources.h"
  24
  25 namespace chromeos {
  26
  27 namespace {
  28
  29 class SetTimeMessageHandler : public content::WebUIMessageHandler,
  30                               public chromeos::SystemClockClient::Observer,
  31                               public system::TimezoneSettings::Observer {
  32  public:
  33   SetTimeMessageHandler() {
  34     system::TimezoneSettings::GetInstance()->AddObserver(this);
  35     chromeos::DBusThreadManager::Get()->GetSystemClockClient()->AddObserver(
  36         this);
  37   }
  38
  39   ~SetTimeMessageHandler() override {
  40     system::TimezoneSettings::GetInstance()->RemoveObserver(this);
  41     chromeos::DBusThreadManager::Get()->GetSystemClockClient()->RemoveObserver(
  42         this);
  43   }
  44
  45   // WebUIMessageHandler:
  46   void RegisterMessages() override {
  47     web_ui()->RegisterMessageCallback(
  48         "setTimeInSeconds",
  49         base::Bind(&SetTimeMessageHandler::OnSetTime, base::Unretained(this)));
  50     web_ui()->RegisterMessageCallback(
  51         "setTimezone",
  52         base::Bind(&SetTimeMessageHandler::OnSetTimezone,
  53                    base::Unretained(this)));
  54   }
  55
  56  private:
  57   // system::SystemClockClient::Observer:
  58   void SystemClockUpdated() override {
  59     web_ui()->CallJavascriptFunction("settime.TimeSetter.updateTime");
  60   }
  61
  62   // system::TimezoneSettings::Observer:
  63   void TimezoneChanged(const icu::TimeZone& timezone) override {
  64     base::StringValue timezone_id(
  65         system::TimezoneSettings::GetTimezoneID(timezone));
  66     web_ui()->CallJavascriptFunction("settime.TimeSetter.setTimezone",
  67                                      timezone_id);
  68   }
  69
  70   // Handler for Javascript call to set the system clock when the user sets a
  71   // new time. Expects the time as the number of seconds since the Unix
  72   // epoch, treated as a double.
  73   void OnSetTime(const base::ListValue* args) {
  74     double seconds;
  75     if (!args->GetDouble(0, &seconds)) {
  76       NOTREACHED();
  77       return;
  78     }
  79
  80     chromeos::DBusThreadManager::Get()->GetSystemClockClient()->SetTime(
  81         static_cast<int64>(seconds));
  82   }
  83
  84   // Handler for Javascript call to change the system time zone when the user
  85   // selects a new time zone. Expects the time zone ID as a string, as it
  86   // appears in the time zone option values.
  87   void OnSetTimezone(const base::ListValue* args) {
  88     std::string timezone_id;
  89     if (!args->GetString(0, &timezone_id)) {
  90       NOTREACHED();
  91       return;
  92     }
  93
  94     CrosSettings::Get()->SetString(kSystemTimezone, timezone_id);
  95   }
  96
  97   DISALLOW_COPY_AND_ASSIGN(SetTimeMessageHandler);
  98 };
  99
 100 }  // namespace
 101
 102 SetTimeUI::SetTimeUI(content::WebUI* web_ui) : WebDialogUI(web_ui) {
 103   web_ui->AddMessageHandler(new SetTimeMessageHandler());
 104
 105   // Set up the chrome://set-time source.
 106   content::WebUIDataSource* source =
 107       content::WebUIDataSource::Create(chrome::kChromeUISetTimeHost);
 108
 109   source->AddLocalizedString("setTimeTitle", IDS_SET_TIME_TITLE);
 110   source->AddLocalizedString("prompt", IDS_SET_TIME_PROMPT);
 111   source->AddLocalizedString("doneButton", IDS_SET_TIME_BUTTON_CLOSE);
 112   source->AddLocalizedString("timezone",
 113                              IDS_OPTIONS_SETTINGS_TIMEZONE_DESCRIPTION);
 114   source->AddLocalizedString("dateLabel", IDS_SET_TIME_DATE_LABEL);
 115   source->AddLocalizedString("timeLabel", IDS_SET_TIME_TIME_LABEL);
 116
 117   base::DictionaryValue values;
 118   values.Set("timezoneList", chromeos::system::GetTimezoneList().release());
 119
 120   // If we are not logged in, we need to show the time zone dropdown.
 121   // Otherwise, we can leave |currentTimezoneId| blank.
 122   std::string current_timezone_id;
 123   if (!LoginState::Get()->IsUserLoggedIn())
 124     CrosSettings::Get()->GetString(kSystemTimezone, &current_timezone_id);
 125   values.SetString("currentTimezoneId", current_timezone_id);
 126   values.SetDouble("buildTime", base::GetBuildTime().ToJsTime());
 127
 128   source->AddLocalizedStrings(values);
 129   source->SetJsonPath("strings.js");
 130
 131   source->AddResourcePath("set_time.css", IDR_SET_TIME_CSS);
 132   source->AddResourcePath("set_time.js", IDR_SET_TIME_JS);
 133   source->SetDefaultResource(IDR_SET_TIME_HTML);
 134
 135   content::WebUIDataSource::Add(Profile::FromWebUI(web_ui), source);
 136 }
 137
 138 SetTimeUI::~SetTimeUI() {
 139 }
 140
 141 }  // namespace chromeos