Implement the auto-logout on idle feature for Kiosk mode.

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

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/webui/chromeos/idle_logout_dialog.h"
+
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/json/json_reader.h"
+#include "base/utf_string_conversions.h"
+#include "base/values.h"
+#include "chrome/browser/chromeos/dbus/dbus_thread_manager.h"
+#include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_helper.h"
+#include "chrome/browser/chromeos/dbus/power_manager_client.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/browser_dialogs.h"
+#include "chrome/browser/ui/dialog_style.h"
+#include "chrome/browser/ui/tab_contents/core_tab_helper.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+#include "chrome/browser/ui/webui/chrome_web_ui_data_source.h"
+#include "chrome/browser/ui/webui/html_dialog_ui.h"
+#include "chrome/common/logging_chrome.h"
+#include "chrome/common/url_constants.h"
+#include "content/browser/renderer_host/render_view_host.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_ui_message_handler.h"
+#include "content/public/common/result_codes.h"
+#include "grit/browser_resources.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+using content::WebContents;
+using content::WebUIMessageHandler;
+
+namespace {
+
+// Global singleton instance of our dialog class.
+IdleLogoutDialog* g_instance = NULL;
+// Height/Width of the logout dialog.
+const int kIdleLogoutDialogWidth = 400;
+const int kIdleLogoutDialogHeight = 120;
+
+}  // namespace
+
+////////////////////////////////////////////////////////////////////////////////
+// IdleLogoutDialogHandler
+
+class IdleLogoutDialogHandler : public content::WebUIMessageHandler {
+ public:
+  IdleLogoutDialogHandler() : contents_(NULL) {}
+  virtual void RegisterMessages() OVERRIDE;
+  void CloseDialog();
+
+ private:
+  void RequestCountdown(const base::ListValue*);
+  void RequestLogout(const base::ListValue*);
+
+  content::WebContents* contents_;
+
+  DISALLOW_COPY_AND_ASSIGN(IdleLogoutDialogHandler);
+};
+
+////////////////////////////////////////////////////////////////////////////////
+// IdleLogoutDialog public static methods
+
+void IdleLogoutDialog::ShowIdleLogoutDialog() {
+  if (!g_instance) {
+    g_instance = new IdleLogoutDialog();
+  }
+  g_instance->ShowDialog();
+}
+
+void IdleLogoutDialog::CloseIdleLogoutDialog() {
+  if (g_instance)
+    g_instance->CloseDialog();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// IdleLogoutDialog private methods
+
+IdleLogoutDialog::IdleLogoutDialog()
+    : contents_(NULL), handler_(NULL) {
+}
+
+IdleLogoutDialog::~IdleLogoutDialog() {
+}
+
+void IdleLogoutDialog::ShowDialog() {
+  Browser* browser = BrowserList::GetLastActive();
+  DCHECK(browser);
+  handler_ = new IdleLogoutDialogHandler();
+  browser->BrowserShowHtmlDialog(this, NULL, STYLE_GENERIC);
+}
+
+void IdleLogoutDialog::CloseDialog() {
+  contents_ = NULL;
+  handler_->CloseDialog();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Overridden from HtmlDialogUIDelegate
+ui::ModalType IdleLogoutDialog::GetDialogModalType() const {
+  return ui::MODAL_TYPE_WINDOW;
+}
+
+string16 IdleLogoutDialog::GetDialogTitle() const {
+  return string16();
+}
+
+GURL IdleLogoutDialog::GetDialogContentURL() const {
+  return GURL(chrome::kChromeUIIdleLogoutDialogURL);
+}
+
+void IdleLogoutDialog::GetWebUIMessageHandlers(
+  std::vector<WebUIMessageHandler*>* handlers) const {
+  handlers->push_back(handler_);
+}
+
+void IdleLogoutDialog::GetDialogSize(gfx::Size* size) const {
+  size->SetSize(kIdleLogoutDialogWidth, kIdleLogoutDialogHeight);
+}
+
+std::string IdleLogoutDialog::GetDialogArgs() const {
+  return std::string();
+}
+
+void IdleLogoutDialog::OnDialogClosed(const std::string& json_retval) {
+  g_instance = NULL;
+  delete this;
+}
+
+void IdleLogoutDialog::OnCloseContents(WebContents* source,
+                                             bool* out_close_dialog) {

[xiyuan, 2012/03/01 23:15:56]

nit: alignment

[rkc, 2012/03/02 00:10:19]

Done.

+  NOTIMPLEMENTED();
+}
+
+bool IdleLogoutDialog::ShouldShowDialogTitle() const {
+  return false;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// IdleLogoutDialogUI methods
+
+IdleLogoutDialogUI::IdleLogoutDialogUI(content::WebUI* web_ui)
+    : HtmlDialogUI(web_ui) {
+  ChromeWebUIDataSource* source =
+      new ChromeWebUIDataSource(chrome::kChromeUIIdleLogoutDialogHost);
+
+  source->AddLocalizedString("title", IDS_IDLE_LOGOUT_TITLE);
+  source->AddLocalizedString("warning", IDS_IDLE_LOGOUT_WARNING);
+
+  source->set_json_path("strings.js");
+
+  source->add_resource_path("idle_logout_dialog.js",
+                            IDR_IDLE_LOGOUT_DIALOG_JS);
+  source->add_resource_path("idle_logout_dialog.css",
+                            IDR_IDLE_LOGOUT_DIALOG_CSS);
+
+  source->set_default_resource(IDR_IDLE_LOGOUT_DIALOG_HTML);
+
+  Profile* profile = Profile::FromWebUI(web_ui);
+  profile->GetChromeURLDataManager()->AddDataSource(source);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// IdleLogoutDialogHandler methods
+
+void IdleLogoutDialogHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback("requestCountdown",
+      base::Bind(&IdleLogoutDialogHandler::RequestCountdown,
+                 base::Unretained(this)));
+  web_ui()->RegisterMessageCallback("requestLogout",
+      base::Bind(&IdleLogoutDialogHandler::RequestLogout,
+                 base::Unretained(this)));
+}
+
+void IdleLogoutDialogHandler::CloseDialog() {
+  static_cast<HtmlDialogUI*>(web_ui()->GetController())->CloseDialog(NULL);
+}
+
+void IdleLogoutDialogHandler::RequestCountdown(const base::ListValue*) {
+  if (!chromeos::KioskModeHelper::Get()->is_initialized()) {
+    chromeos::KioskModeHelper::Get()->Initialize(
+            base::Bind(&IdleLogoutDialogHandler::RequestCountdown,
+                       base::Unretained(this), (base::ListValue*) NULL));
+    return;
+  }
+  web_ui()->CallJavascriptFunction("startCountdown",
+      base::FundamentalValue((int)
+          chromeos::KioskModeHelper::Get()->GetIdleLogoutWarningTimeout()));
+}
+
+void IdleLogoutDialogHandler::RequestLogout(const base::ListValue*) {
+  BrowserList::AttemptUserExit();
+}