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

   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 #include "chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.h"
   6
   7 #include "ash/display/display_manager.h"
   8 #include "ash/shell.h"
   9 #include "base/bind.h"
  10 #include "base/bind_helpers.h"
  11 #include "base/command_line.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "base/prefs/pref_service.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/values.h"
  16 #include "chrome/browser/profiles/profile.h"
  17 #include "chrome/common/pref_names.h"
  18 #include "chrome/common/url_constants.h"
  19 #include "chrome/grit/chromium_strings.h"
  20 #include "chrome/grit/generated_resources.h"
  21 #include "chromeos/chromeos_switches.h"
  22 #include "content/public/browser/page_navigator.h"
  23 #include "content/public/browser/web_contents.h"
  24 #include "content/public/browser/web_contents_delegate.h"
  25 #include "content/public/browser/web_ui.h"
  26 #include "content/public/browser/web_ui_data_source.h"
  27 #include "content/public/browser/web_ui_message_handler.h"
  28 #include "grit/browser_resources.h"
  29 #include "ui/base/ime/chromeos/ime_keyboard.h"
  30 #include "ui/base/ime/chromeos/input_method_manager.h"
  31
  32 using chromeos::input_method::ModifierKey;
  33 using content::WebUIMessageHandler;
  34 using ui::WebDialogUI;
  35
  36 namespace {
  37
  38 const char kLearnMoreURL[] =
  39 #if defined(OFFICIAL_BUILD)
  40     "chrome-extension://honijodknafkokifofgiaalefdiedpko/"
  41     "main.html?answer=188743";
  42 #else
  43     "https://support.google.com/chromebook/answer/183101";
  44 #endif
  45
  46 struct ModifierToLabel {
  47   const ModifierKey modifier;
  48   const char* label;
  49 } kModifierToLabels[] = {
  50   {chromeos::input_method::kSearchKey, "search"},
  51   {chromeos::input_method::kControlKey, "ctrl"},
  52   {chromeos::input_method::kAltKey, "alt"},
  53   {chromeos::input_method::kVoidKey, "disabled"},
  54   {chromeos::input_method::kCapsLockKey, "caps lock"},
  55   {chromeos::input_method::kEscapeKey, "esc"},
  56 };
  57
  58 struct I18nContentToMessage {
  59   const char* i18n_content;
  60   int message;
  61 } kI18nContentToMessage[] = {
  62   { "keyboardOverlayLearnMore", IDS_KEYBOARD_OVERLAY_LEARN_MORE },
  63   { "keyboardOverlayTitle", IDS_KEYBOARD_OVERLAY_TITLE },
  64   { "keyboardOverlayEscKeyLabel", IDS_KEYBOARD_OVERLAY_ESC_KEY_LABEL },
  65   { "keyboardOverlayBackKeyLabel", IDS_KEYBOARD_OVERLAY_BACK_KEY_LABEL },
  66   { "keyboardOverlayForwardKeyLabel", IDS_KEYBOARD_OVERLAY_FORWARD_KEY_LABEL },
  67   { "keyboardOverlayReloadKeyLabel", IDS_KEYBOARD_OVERLAY_RELOAD_KEY_LABEL },
  68   { "keyboardOverlayFullScreenKeyLabel",
  69       IDS_KEYBOARD_OVERLAY_FULL_SCREEN_KEY_LABEL },
  70   { "keyboardOverlaySwitchWinKeyLabel",
  71       IDS_KEYBOARD_OVERLAY_SWITCH_WIN_KEY_LABEL },
  72   { "keyboardOverlayBrightDownKeyLabel",
  73       IDS_KEYBOARD_OVERLAY_BRIGHT_DOWN_KEY_LABEL },
  74   { "keyboardOverlayBrightUpKeyLabel",
  75       IDS_KEYBOARD_OVERLAY_BRIGHT_UP_KEY_LABEL },
  76   { "keyboardOverlayMuteKeyLabel", IDS_KEYBOARD_OVERLAY_MUTE_KEY_LABEL },
  77   { "keyboardOverlayVolDownKeyLabel", IDS_KEYBOARD_OVERLAY_VOL_DOWN_KEY_LABEL },
  78   { "keyboardOverlayVolUpKeyLabel", IDS_KEYBOARD_OVERLAY_VOL_UP_KEY_LABEL },
  79   { "keyboardOverlayPowerKeyLabel", IDS_KEYBOARD_OVERLAY_POWER_KEY_LABEL },
  80   { "keyboardOverlayBackspaceKeyLabel",
  81       IDS_KEYBOARD_OVERLAY_BACKSPACE_KEY_LABEL },
  82   { "keyboardOverlayTabKeyLabel", IDS_KEYBOARD_OVERLAY_TAB_KEY_LABEL },
  83   { "keyboardOverlaySearchKeyLabel", IDS_KEYBOARD_OVERLAY_SEARCH_KEY_LABEL },
  84   { "keyboardOverlayEnterKeyLabel", IDS_KEYBOARD_OVERLAY_ENTER_KEY_LABEL },
  85   { "keyboardOverlayShiftKeyLabel", IDS_KEYBOARD_OVERLAY_SHIFT_KEY_LABEL },
  86   { "keyboardOverlayCtrlKeyLabel", IDS_KEYBOARD_OVERLAY_CTRL_KEY_LABEL },
  87   { "keyboardOverlayAltKeyLabel", IDS_KEYBOARD_OVERLAY_ALT_KEY_LABEL },
  88   { "keyboardOverlayLeftKeyLabel", IDS_KEYBOARD_OVERLAY_LEFT_KEY_LABEL },
  89   { "keyboardOverlayRightKeyLabel", IDS_KEYBOARD_OVERLAY_RIGHT_KEY_LABEL },
  90   { "keyboardOverlayUpKeyLabel", IDS_KEYBOARD_OVERLAY_UP_KEY_LABEL },
  91   { "keyboardOverlayDownKeyLabel", IDS_KEYBOARD_OVERLAY_DOWN_KEY_LABEL },
  92   { "keyboardOverlayInstructions", IDS_KEYBOARD_OVERLAY_INSTRUCTIONS },
  93   { "keyboardOverlayInstructionsHide", IDS_KEYBOARD_OVERLAY_INSTRUCTIONS_HIDE },
  94   { "keyboardOverlayActivateLastShelfItem",
  95     IDS_KEYBOARD_OVERLAY_ACTIVATE_LAST_SHELF_ITEM },
  96   { "keyboardOverlayActivateLastTab", IDS_KEYBOARD_OVERLAY_ACTIVATE_LAST_TAB },
  97   { "keyboardOverlayActivateShelfItem1",
  98     IDS_KEYBOARD_OVERLAY_ACTIVATE_SHELF_ITEM_1 },
  99   { "keyboardOverlayActivateShelfItem2",
 100     IDS_KEYBOARD_OVERLAY_ACTIVATE_SHELF_ITEM_2 },
 101   { "keyboardOverlayActivateShelfItem3",
 102     IDS_KEYBOARD_OVERLAY_ACTIVATE_SHELF_ITEM_3 },
 103   { "keyboardOverlayActivateShelfItem4",
 104     IDS_KEYBOARD_OVERLAY_ACTIVATE_SHELF_ITEM_4 },
 105   { "keyboardOverlayActivateShelfItem5",
 106     IDS_KEYBOARD_OVERLAY_ACTIVATE_SHELF_ITEM_5 },
 107   { "keyboardOverlayActivateShelfItem6",
 108     IDS_KEYBOARD_OVERLAY_ACTIVATE_SHELF_ITEM_6 },
 109   { "keyboardOverlayActivateShelfItem7",
 110     IDS_KEYBOARD_OVERLAY_ACTIVATE_SHELF_ITEM_7 },
 111   { "keyboardOverlayActivateShelfItem8",
 112     IDS_KEYBOARD_OVERLAY_ACTIVATE_SHELF_ITEM_8 },
 113   { "keyboardOverlayActivateNextTab", IDS_KEYBOARD_OVERLAY_ACTIVATE_NEXT_TAB },
 114   { "keyboardOverlayActivatePreviousTab",
 115     IDS_KEYBOARD_OVERLAY_ACTIVATE_PREVIOUS_TAB },
 116   { "keyboardOverlayActivateTab1", IDS_KEYBOARD_OVERLAY_ACTIVATE_TAB_1 },
 117   { "keyboardOverlayActivateTab2", IDS_KEYBOARD_OVERLAY_ACTIVATE_TAB_2 },
 118   { "keyboardOverlayActivateTab3", IDS_KEYBOARD_OVERLAY_ACTIVATE_TAB_3 },
 119   { "keyboardOverlayActivateTab4", IDS_KEYBOARD_OVERLAY_ACTIVATE_TAB_4 },
 120   { "keyboardOverlayActivateTab5", IDS_KEYBOARD_OVERLAY_ACTIVATE_TAB_5 },
 121   { "keyboardOverlayActivateTab6", IDS_KEYBOARD_OVERLAY_ACTIVATE_TAB_6 },
 122   { "keyboardOverlayActivateTab7", IDS_KEYBOARD_OVERLAY_ACTIVATE_TAB_7 },
 123   { "keyboardOverlayActivateTab8", IDS_KEYBOARD_OVERLAY_ACTIVATE_TAB_8 },
 124   { "keyboardOverlayAddWwwAndComAndOpenAddress",
 125     IDS_KEYBOARD_OVERLAY_ADD_WWW_AND_COM_AND_OPEN_ADDRESS },
 126   { "keyboardOverlayBookmarkAllTabs", IDS_KEYBOARD_OVERLAY_BOOKMARK_ALL_TABS },
 127   { "keyboardOverlayBookmarkCurrentPage",
 128     IDS_KEYBOARD_OVERLAY_BOOKMARK_CURRENT_PAGE },
 129   { "keyboardOverlayBookmarkManager", IDS_KEYBOARD_OVERLAY_BOOKMARK_MANAGER },
 130   { "keyboardOverlayCenterWindow", IDS_KEYBOARD_OVERLAY_CENTER_WINDOW },
 131   { "keyboardOverlayClearBrowsingDataDialog",
 132     IDS_KEYBOARD_OVERLAY_CLEAR_BROWSING_DATA_DIALOG },
 133   { "keyboardOverlayCloseTab", IDS_KEYBOARD_OVERLAY_CLOSE_TAB },
 134   { "keyboardOverlayCloseWindow", IDS_KEYBOARD_OVERLAY_CLOSE_WINDOW },
 135   { "keyboardOverlayCopy", IDS_KEYBOARD_OVERLAY_COPY },
 136   { "keyboardOverlayCut", IDS_KEYBOARD_OVERLAY_CUT },
 137   { "keyboardOverlayCycleThroughInputMethods",
 138     IDS_KEYBOARD_OVERLAY_CYCLE_THROUGH_INPUT_METHODS },
 139   { "keyboardOverlayDecreaseKeyBrightness",
 140     IDS_KEYBOARD_OVERLAY_DECREASE_KEY_BRIGHTNESS },
 141   { "keyboardOverlayDelete", IDS_KEYBOARD_OVERLAY_DELETE },
 142   { "keyboardOverlayDeleteWord", IDS_KEYBOARD_OVERLAY_DELETE_WORD },
 143   { "keyboardOverlayDeveloperTools", IDS_KEYBOARD_OVERLAY_DEVELOPER_TOOLS },
 144   { "keyboardOverlayDockWindowLeft", IDS_KEYBOARD_OVERLAY_DOCK_WINDOW_LEFT },
 145   { "keyboardOverlayDockWindowRight", IDS_KEYBOARD_OVERLAY_DOCK_WINDOW_RIGHT },
 146   { "keyboardOverlayDomInspector", IDS_KEYBOARD_OVERLAY_DOM_INSPECTOR },
 147   { "keyboardOverlayDownloads", IDS_KEYBOARD_OVERLAY_DOWNLOADS },
 148   { "keyboardOverlayEnd", IDS_KEYBOARD_OVERLAY_END },
 149   { "keyboardOverlayF1", IDS_KEYBOARD_OVERLAY_F1 },
 150   { "keyboardOverlayF10", IDS_KEYBOARD_OVERLAY_F10 },
 151   { "keyboardOverlayF11", IDS_KEYBOARD_OVERLAY_F11 },
 152   { "keyboardOverlayF12", IDS_KEYBOARD_OVERLAY_F12 },
 153   { "keyboardOverlayF2", IDS_KEYBOARD_OVERLAY_F2 },
 154   { "keyboardOverlayF3", IDS_KEYBOARD_OVERLAY_F3 },
 155   { "keyboardOverlayF4", IDS_KEYBOARD_OVERLAY_F4 },
 156   { "keyboardOverlayF5", IDS_KEYBOARD_OVERLAY_F5 },
 157   { "keyboardOverlayF6", IDS_KEYBOARD_OVERLAY_F6 },
 158   { "keyboardOverlayF7", IDS_KEYBOARD_OVERLAY_F7 },
 159   { "keyboardOverlayF8", IDS_KEYBOARD_OVERLAY_F8 },
 160   { "keyboardOverlayF9", IDS_KEYBOARD_OVERLAY_F9 },
 161   { "keyboardOverlayFindPreviousText",
 162     IDS_KEYBOARD_OVERLAY_FIND_PREVIOUS_TEXT },
 163   { "keyboardOverlayFindText", IDS_KEYBOARD_OVERLAY_FIND_TEXT },
 164   { "keyboardOverlayFindTextAgain", IDS_KEYBOARD_OVERLAY_FIND_TEXT_AGAIN },
 165   { "keyboardOverlayFocusAddressBar", IDS_KEYBOARD_OVERLAY_FOCUS_ADDRESS_BAR },
 166   { "keyboardOverlayFocusAddressBarInSearchMode",
 167     IDS_KEYBOARD_OVERLAY_FOCUS_ADDRESS_BAR_IN_SEARCH_MODE },
 168   { "keyboardOverlayFocusBookmarks", IDS_KEYBOARD_OVERLAY_FOCUS_BOOKMARKS },
 169   { "keyboardOverlayFocusShelf", IDS_KEYBOARD_OVERLAY_FOCUS_SHELF },
 170   { "keyboardOverlayFocusNextPane", IDS_KEYBOARD_OVERLAY_FOCUS_NEXT_PANE },
 171   { "keyboardOverlayFocusPreviousPane",
 172     IDS_KEYBOARD_OVERLAY_FOCUS_PREVIOUS_PANE },
 173   { "keyboardOverlayFocusToolbar", IDS_KEYBOARD_OVERLAY_FOCUS_TOOLBAR },
 174   { "keyboardOverlayGoBack", IDS_KEYBOARD_OVERLAY_GO_BACK },
 175   { "keyboardOverlayGoForward", IDS_KEYBOARD_OVERLAY_GO_FORWARD },
 176   { "keyboardOverlayHelp", IDS_KEYBOARD_OVERLAY_HELP },
 177   { "keyboardOverlayHistory", IDS_KEYBOARD_OVERLAY_HISTORY },
 178   { "keyboardOverlayHome", IDS_KEYBOARD_OVERLAY_HOME },
 179   { "keyboardOverlayIncreaseKeyBrightness",
 180     IDS_KEYBOARD_OVERLAY_INCREASE_KEY_BRIGHTNESS },
 181   { "keyboardOverlayInputUnicodeCharacters",
 182     IDS_KEYBOARD_OVERLAY_INPUT_UNICODE_CHARACTERS },
 183   { "keyboardOverlayInsert", IDS_KEYBOARD_OVERLAY_INSERT },
 184   { "keyboardOverlayJavascriptConsole",
 185     IDS_KEYBOARD_OVERLAY_JAVASCRIPT_CONSOLE },
 186   { "keyboardOverlayLockScreen", IDS_KEYBOARD_OVERLAY_LOCK_SCREEN },
 187   { "keyboardOverlayLockScreenOrPowerOff",
 188     IDS_KEYBOARD_OVERLAY_LOCK_SCREEN_OR_POWER_OFF },
 189   { "keyboardOverlayMagnifierDecreaseZoom",
 190     IDS_KEYBOARD_OVERLAY_MAGNIFIER_DECREASE_ZOOM },
 191   { "keyboardOverlayMagnifierIncreaseZoom",
 192     IDS_KEYBOARD_OVERLAY_MAGNIFIER_INCREASE_ZOOM },
 193   { "keyboardOverlayMaximizeWindow", IDS_KEYBOARD_OVERLAY_MAXIMIZE_WINDOW },
 194   { "keyboardOverlayMinimizeWindow", IDS_KEYBOARD_OVERLAY_MINIMIZE_WINDOW },
 195   { "keyboardOverlayMirrorMonitors", IDS_KEYBOARD_OVERLAY_MIRROR_MONITORS },
 196   { "keyboardOverlayNewIncognitoWindow",
 197     IDS_KEYBOARD_OVERLAY_NEW_INCOGNITO_WINDOW },
 198   { "keyboardOverlayNewTab", IDS_KEYBOARD_OVERLAY_NEW_TAB },
 199   { "keyboardOverlayNewTerminal", IDS_KEYBOARD_OVERLAY_NEW_TERMINAL },
 200   { "keyboardOverlayNewWindow", IDS_KEYBOARD_OVERLAY_NEW_WINDOW },
 201   { "keyboardOverlayNextUser", IDS_KEYBOARD_OVERLAY_NEXT_USER },
 202   { "keyboardOverlayNextWindow", IDS_KEYBOARD_OVERLAY_NEXT_WINDOW },
 203   { "keyboardOverlayNextWord", IDS_KEYBOARD_OVERLAY_NEXT_WORD },
 204   { "keyboardOverlayOpen", IDS_KEYBOARD_OVERLAY_OPEN },
 205   { "keyboardOverlayOpenAddressInNewTab",
 206     IDS_KEYBOARD_OVERLAY_OPEN_ADDRESS_IN_NEW_TAB },
 207   { "keyboardOverlayOpenFileManager", IDS_KEYBOARD_OVERLAY_OPEN_FILE_MANAGER },
 208   { "keyboardOverlayOpenGoogleCloudPrint",
 209     IDS_KEYBOARD_OVERLAY_OPEN_GOOGLE_CLOUD_PRINT },
 210   { "keyboardOverlayPageDown", IDS_KEYBOARD_OVERLAY_PAGE_DOWN },
 211   { "keyboardOverlayPageUp", IDS_KEYBOARD_OVERLAY_PAGE_UP },
 212   { "keyboardOverlayPaste", IDS_KEYBOARD_OVERLAY_PASTE },
 213   { "keyboardOverlayPasteAsPlainText",
 214     IDS_KEYBOARD_OVERLAY_PASTE_AS_PLAIN_TEXT },
 215   { "keyboardOverlayPreviousUser", IDS_KEYBOARD_OVERLAY_PREVIOUS_USER },
 216   { "keyboardOverlayPreviousWindow", IDS_KEYBOARD_OVERLAY_PREVIOUS_WINDOW },
 217   { "keyboardOverlayPreviousWord", IDS_KEYBOARD_OVERLAY_PREVIOUS_WORD },
 218   { "keyboardOverlayPrint", IDS_KEYBOARD_OVERLAY_PRINT },
 219   { "keyboardOverlayReloadCurrentPage",
 220     IDS_KEYBOARD_OVERLAY_RELOAD_CURRENT_PAGE },
 221   { "keyboardOverlayReloadIgnoringCache",
 222     IDS_KEYBOARD_OVERLAY_RELOAD_IGNORING_CACHE },
 223   { "keyboardOverlayReopenLastClosedTab",
 224     IDS_KEYBOARD_OVERLAY_REOPEN_LAST_CLOSED_TAB },
 225   { "keyboardOverlayReportIssue", IDS_KEYBOARD_OVERLAY_REPORT_ISSUE },
 226   { "keyboardOverlayResetScreenZoom", IDS_KEYBOARD_OVERLAY_RESET_SCREEN_ZOOM },
 227   { "keyboardOverlayResetZoom", IDS_KEYBOARD_OVERLAY_RESET_ZOOM },
 228   { "keyboardOverlayRotateScreen", IDS_KEYBOARD_OVERLAY_ROTATE_SCREEN },
 229   { "keyboardOverlaySave", IDS_KEYBOARD_OVERLAY_SAVE },
 230   { "keyboardOverlayScreenshotRegion",
 231     IDS_KEYBOARD_OVERLAY_SCREENSHOT_REGION },
 232   { "keyboardOverlayScrollUpOnePage",
 233     IDS_KEYBOARD_OVERLAY_SCROLL_UP_ONE_PAGE },
 234   { "keyboardOverlaySelectAll", IDS_KEYBOARD_OVERLAY_SELECT_ALL },
 235   { "keyboardOverlaySelectPreviousInputMethod",
 236     IDS_KEYBOARD_OVERLAY_SELECT_PREVIOUS_INPUT_METHOD },
 237   { "keyboardOverlaySelectWordAtATime",
 238     IDS_KEYBOARD_OVERLAY_SELECT_WORD_AT_A_TIME },
 239   { "keyboardOverlayShowMessageCenter",
 240     IDS_KEYBOARD_OVERLAY_SHOW_MESSAGE_CENTER },
 241   { "keyboardOverlayShowStatusMenu", IDS_KEYBOARD_OVERLAY_SHOW_STATUS_MENU },
 242   { "keyboardOverlayShowWrenchMenu", IDS_KEYBOARD_OVERLAY_SHOW_WRENCH_MENU },
 243   { "keyboardOverlaySignOut", IDS_KEYBOARD_OVERLAY_SIGN_OUT },
 244   { "keyboardOverlaySwapPrimaryMonitor",
 245     IDS_KEYBOARD_OVERLAY_SWAP_PRIMARY_MONITOR },
 246   { "keyboardOverlayTakeScreenshot", IDS_KEYBOARD_OVERLAY_TAKE_SCREENSHOT },
 247   { "keyboardOverlayTaskManager", IDS_KEYBOARD_OVERLAY_TASK_MANAGER },
 248   { "keyboardOverlayToggleBookmarkBar",
 249     IDS_KEYBOARD_OVERLAY_TOGGLE_BOOKMARK_BAR },
 250   { "keyboardOverlayToggleCapsLock", IDS_KEYBOARD_OVERLAY_TOGGLE_CAPS_LOCK },
 251   { "keyboardOverlayDisableCapsLock", IDS_KEYBOARD_OVERLAY_DISABLE_CAPS_LOCK },
 252   { "keyboardOverlayToggleChromevoxSpokenFeedback",
 253     IDS_KEYBOARD_OVERLAY_TOGGLE_CHROMEVOX_SPOKEN_FEEDBACK },
 254   { "keyboardOverlayToggleProjectionTouchHud",
 255     IDS_KEYBOARD_OVERLAY_TOGGLE_PROJECTION_TOUCH_HUD },
 256   { "keyboardOverlayToggleSpeechInput",
 257     IDS_KEYBOARD_OVERLAY_TOGGLE_SPEECH_INPUT },
 258   { "keyboardOverlayUndo", IDS_KEYBOARD_OVERLAY_UNDO },
 259   { "keyboardOverlayViewKeyboardOverlay",
 260     IDS_KEYBOARD_OVERLAY_VIEW_KEYBOARD_OVERLAY },
 261   { "keyboardOverlayViewSource", IDS_KEYBOARD_OVERLAY_VIEW_SOURCE },
 262   { "keyboardOverlayWordMove", IDS_KEYBOARD_OVERLAY_WORD_MOVE },
 263   { "keyboardOverlayZoomIn", IDS_KEYBOARD_OVERLAY_ZOOM_IN },
 264   { "keyboardOverlayZoomOut", IDS_KEYBOARD_OVERLAY_ZOOM_OUT },
 265   { "keyboardOverlayZoomScreenIn", IDS_KEYBOARD_OVERLAY_ZOOM_SCREEN_IN },
 266   { "keyboardOverlayZoomScreenOut", IDS_KEYBOARD_OVERLAY_ZOOM_SCREEN_OUT },
 267 };
 268
 269 std::string ModifierKeyToLabel(ModifierKey modifier) {
 270   for (size_t i = 0; i < arraysize(kModifierToLabels); ++i) {
 271     if (modifier == kModifierToLabels[i].modifier) {
 272       return kModifierToLabels[i].label;
 273     }
 274   }
 275   return "";
 276 }
 277
 278 content::WebUIDataSource* CreateKeyboardOverlayUIHTMLSource() {
 279   content::WebUIDataSource* source =
 280       content::WebUIDataSource::Create(chrome::kChromeUIKeyboardOverlayHost);
 281
 282   for (size_t i = 0; i < arraysize(kI18nContentToMessage); ++i) {
 283     source->AddLocalizedString(kI18nContentToMessage[i].i18n_content,
 284                                kI18nContentToMessage[i].message);
 285   }
 286
 287   source->AddString("keyboardOverlayLearnMoreURL",
 288                     base::UTF8ToUTF16(kLearnMoreURL));
 289   source->AddBoolean("keyboardOverlayHasChromeOSDiamondKey",
 290                      base::CommandLine::ForCurrentProcess()->HasSwitch(
 291                          chromeos::switches::kHasChromeOSDiamondKey));
 292   ash::Shell* shell = ash::Shell::GetInstance();
 293   ash::DisplayManager* display_manager = shell->display_manager();
 294   source->AddBoolean("keyboardOverlayIsDisplayUIScalingEnabled",
 295                      display_manager->IsDisplayUIScalingEnabled());
 296   source->SetJsonPath("strings.js");
 297   source->AddResourcePath("keyboard_overlay.js", IDR_KEYBOARD_OVERLAY_JS);
 298   source->SetDefaultResource(IDR_KEYBOARD_OVERLAY_HTML);
 299   return source;
 300 }
 301
 302 }  // namespace
 303
 304 // The handler for Javascript messages related to the "keyboardoverlay" view.
 305 class KeyboardOverlayHandler
 306     : public WebUIMessageHandler,
 307       public base::SupportsWeakPtr<KeyboardOverlayHandler> {
 308  public:
 309   explicit KeyboardOverlayHandler(Profile* profile);
 310   ~KeyboardOverlayHandler() override;
 311
 312   // WebUIMessageHandler implementation.
 313   void RegisterMessages() override;
 314
 315  private:
 316   // Called when the page requires the input method ID corresponding to the
 317   // current input method or keyboard layout during initialization.
 318   void GetInputMethodId(const base::ListValue* args);
 319
 320   // Called when the page requres the information of modifier key remapping
 321   // during the initialization.
 322   void GetLabelMap(const base::ListValue* args);
 323
 324   // Called when the learn more link is clicked.
 325   void OpenLearnMorePage(const base::ListValue* args);
 326
 327   Profile* profile_;
 328
 329   DISALLOW_COPY_AND_ASSIGN(KeyboardOverlayHandler);
 330 };
 331
 332 ////////////////////////////////////////////////////////////////////////////////
 333 //
 334 // KeyboardOverlayHandler
 335 //
 336 ////////////////////////////////////////////////////////////////////////////////
 337 KeyboardOverlayHandler::KeyboardOverlayHandler(Profile* profile)
 338     : profile_(profile) {
 339 }
 340
 341 KeyboardOverlayHandler::~KeyboardOverlayHandler() {
 342 }
 343
 344 void KeyboardOverlayHandler::RegisterMessages() {
 345   web_ui()->RegisterMessageCallback("getInputMethodId",
 346       base::Bind(&KeyboardOverlayHandler::GetInputMethodId,
 347                  base::Unretained(this)));
 348   web_ui()->RegisterMessageCallback("getLabelMap",
 349       base::Bind(&KeyboardOverlayHandler::GetLabelMap,
 350                  base::Unretained(this)));
 351   web_ui()->RegisterMessageCallback("openLearnMorePage",
 352       base::Bind(&KeyboardOverlayHandler::OpenLearnMorePage,
 353                  base::Unretained(this)));
 354 }
 355
 356 void KeyboardOverlayHandler::GetInputMethodId(const base::ListValue* args) {
 357   chromeos::input_method::InputMethodManager* manager =
 358       chromeos::input_method::InputMethodManager::Get();
 359   const chromeos::input_method::InputMethodDescriptor& descriptor =
 360       manager->GetActiveIMEState()->GetCurrentInputMethod();
 361   base::StringValue param(descriptor.id());
 362   web_ui()->CallJavascriptFunction("initKeyboardOverlayId", param);
 363 }
 364
 365 void KeyboardOverlayHandler::GetLabelMap(const base::ListValue* args) {
 366   DCHECK(profile_);
 367   PrefService* pref_service = profile_->GetPrefs();
 368   typedef std::map<ModifierKey, ModifierKey> ModifierMap;
 369   ModifierMap modifier_map;
 370   modifier_map[chromeos::input_method::kSearchKey] = static_cast<ModifierKey>(
 371       pref_service->GetInteger(prefs::kLanguageRemapSearchKeyTo));
 372   modifier_map[chromeos::input_method::kControlKey] = static_cast<ModifierKey>(
 373       pref_service->GetInteger(prefs::kLanguageRemapControlKeyTo));
 374   modifier_map[chromeos::input_method::kAltKey] = static_cast<ModifierKey>(
 375       pref_service->GetInteger(prefs::kLanguageRemapAltKeyTo));
 376   // TODO(mazda): Support prefs::kLanguageRemapCapsLockKeyTo once Caps Lock is
 377   // added to the overlay UI.
 378
 379   base::DictionaryValue dict;
 380   for (ModifierMap::const_iterator i = modifier_map.begin();
 381        i != modifier_map.end(); ++i) {
 382     dict.SetString(ModifierKeyToLabel(i->first), ModifierKeyToLabel(i->second));
 383   }
 384
 385   web_ui()->CallJavascriptFunction("initIdentifierMap", dict);
 386 }
 387
 388 void KeyboardOverlayHandler::OpenLearnMorePage(const base::ListValue* args) {
 389   web_ui()->GetWebContents()->GetDelegate()->OpenURLFromTab(
 390       web_ui()->GetWebContents(),
 391       content::OpenURLParams(GURL(kLearnMoreURL),
 392                              content::Referrer(),
 393                              NEW_FOREGROUND_TAB,
 394                              ui::PAGE_TRANSITION_LINK,
 395                              false));
 396 }
 397
 398 ////////////////////////////////////////////////////////////////////////////////
 399 //
 400 // KeyboardOverlayUI
 401 //
 402 ////////////////////////////////////////////////////////////////////////////////
 403
 404 KeyboardOverlayUI::KeyboardOverlayUI(content::WebUI* web_ui)
 405     : WebDialogUI(web_ui) {
 406   Profile* profile = Profile::FromWebUI(web_ui);
 407   KeyboardOverlayHandler* handler = new KeyboardOverlayHandler(profile);
 408   web_ui->AddMessageHandler(handler);
 409
 410   // Set up the chrome://keyboardoverlay/ source.
 411   content::WebUIDataSource::Add(profile, CreateKeyboardOverlayUIHTMLSource());
 412 }