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 "ash/shell.h"
8#include "ash/system/tray/system_tray_delegate.h"
9#include "ash/system/user/login_status.h"
10#include "base/bind.h"
11#include "base/bind_helpers.h"
12#include "base/build_time.h"
13#include "base/values.h"
14#include "chrome/browser/chromeos/settings/cros_settings.h"
15#include "chrome/browser/chromeos/system/timezone_util.h"
16#include "chrome/browser/profiles/profile.h"
17#include "chrome/common/url_constants.h"
18#include "chrome/grit/generated_resources.h"
19#include "chromeos/dbus/dbus_thread_manager.h"
20#include "chromeos/dbus/system_clock_client.h"
21#include "chromeos/settings/timezone_settings.h"
22#include "content/public/browser/web_ui.h"
23#include "content/public/browser/web_ui_data_source.h"
24#include "content/public/browser/web_ui_message_handler.h"
25#include "grit/browser_resources.h"
26
27namespace chromeos {
28
29namespace {
30
31class SetTimeMessageHandler : public content::WebUIMessageHandler,
32                              public chromeos::SystemClockClient::Observer,
33                              public system::TimezoneSettings::Observer {
34 public:
35  SetTimeMessageHandler() {
36    system::TimezoneSettings::GetInstance()->AddObserver(this);
37    chromeos::DBusThreadManager::Get()->GetSystemClockClient()->AddObserver(
38        this);
39  }
40
41  virtual ~SetTimeMessageHandler() {
42    system::TimezoneSettings::GetInstance()->RemoveObserver(this);
43    chromeos::DBusThreadManager::Get()->GetSystemClockClient()->RemoveObserver(
44        this);
45  }
46
47  // WebUIMessageHandler:
48  virtual void RegisterMessages() OVERRIDE {
49    web_ui()->RegisterMessageCallback(
50        "setTimeInSeconds",
51        base::Bind(&SetTimeMessageHandler::OnSetTime, base::Unretained(this)));
52    web_ui()->RegisterMessageCallback(
53        "setTimezone",
54        base::Bind(&SetTimeMessageHandler::OnSetTimezone,
55                   base::Unretained(this)));
56  }
57
58 private:
59  // system::SystemClockClient::Observer:
60  virtual void SystemClockUpdated() OVERRIDE {
61    web_ui()->CallJavascriptFunction("settime.TimeSetter.updateTime");
62  }
63
64  // system::TimezoneSettings::Observer:
65  virtual void TimezoneChanged(const icu::TimeZone& timezone) OVERRIDE {
66    base::StringValue timezone_id(
67        system::TimezoneSettings::GetTimezoneID(timezone));
68    web_ui()->CallJavascriptFunction("settime.TimeSetter.setTimezone",
69                                     timezone_id);
70  }
71
72  // Handler for Javascript call to set the system clock when the user sets a
73  // new time. Expects the time as the number of seconds since the Unix
74  // epoch, treated as a double.
75  void OnSetTime(const base::ListValue* args) {
76    double seconds;
77    if (!args->GetDouble(0, &seconds)) {
78      NOTREACHED();
79      return;
80    }
81
82    chromeos::DBusThreadManager::Get()->GetSystemClockClient()->SetTime(
83        static_cast<int64>(seconds));
84  }
85
86  // Handler for Javascript call to change the system time zone when the user
87  // selects a new time zone. Expects the time zone ID as a string, as it
88  // appears in the time zone option values.
89  void OnSetTimezone(const base::ListValue* args) {
90    std::string timezone_id;
91    if (!args->GetString(0, &timezone_id)) {
92      NOTREACHED();
93      return;
94    }
95
96    CrosSettings::Get()->SetString(kSystemTimezone, timezone_id);
97  }
98
99  DISALLOW_COPY_AND_ASSIGN(SetTimeMessageHandler);
100};
101
102}  // namespace
103
104SetTimeUI::SetTimeUI(content::WebUI* web_ui) : WebDialogUI(web_ui) {
105  web_ui->AddMessageHandler(new SetTimeMessageHandler());
106
107  // Set up the chrome://set-time source.
108  content::WebUIDataSource* source =
109      content::WebUIDataSource::Create(chrome::kChromeUISetTimeHost);
110  source->SetUseJsonJSFormatV2();
111
112  source->AddLocalizedString("setTimeTitle", IDS_SET_TIME_TITLE);
113  source->AddLocalizedString("prompt", IDS_SET_TIME_PROMPT);
114  source->AddLocalizedString("doneButton", IDS_SET_TIME_BUTTON_CLOSE);
115  source->AddLocalizedString("timezone",
116                             IDS_OPTIONS_SETTINGS_TIMEZONE_DESCRIPTION);
117  source->AddLocalizedString("dateLabel", IDS_SET_TIME_DATE_LABEL);
118  source->AddLocalizedString("timeLabel", IDS_SET_TIME_TIME_LABEL);
119
120  base::DictionaryValue values;
121  values.Set("timezoneList", chromeos::system::GetTimezoneList().release());
122
123  // If we are not logged in, we need to show the time zone dropdown.
124  // Otherwise, we can leave |currentTimezoneId| blank.
125  std::string current_timezone_id;
126  if (ash::Shell::GetInstance()->system_tray_delegate()->GetUserLoginStatus() ==
127      ash::user::LOGGED_IN_NONE) {
128    CrosSettings::Get()->GetString(kSystemTimezone, &current_timezone_id);
129  }
130  values.SetString("currentTimezoneId", current_timezone_id);
131  values.SetDouble("buildTime", base::GetBuildTime().ToJsTime());
132
133  source->AddLocalizedStrings(values);
134  source->SetJsonPath("strings.js");
135
136  source->AddResourcePath("set_time.css", IDR_SET_TIME_CSS);
137  source->AddResourcePath("set_time.js", IDR_SET_TIME_JS);
138  source->SetDefaultResource(IDR_SET_TIME_HTML);
139
140  content::WebUIDataSource::Add(Profile::FromWebUI(web_ui), source);
141}
142
143SetTimeUI::~SetTimeUI() {
144}
145
146}  // namespace chromeos
147