chrome/browser/chromeos/input_method/input_method_engine.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/chromeos/input_method/input_method_engine.h"
   6
   7 #define XK_MISCELLANY
   8 #include <X11/keysymdef.h>
   9 #include <X11/X.h>
  10 #include <X11/Xlib.h>
  11 #include <X11/Xutil.h>
  12 #undef FocusIn
  13 #undef FocusOut
  14 #undef RootWindow
  15 #include <map>
  16
  17 #include "ash/ime/input_method_menu_item.h"
  18 #include "ash/ime/input_method_menu_manager.h"
  19 #include "ash/shell.h"
  20 #include "base/logging.h"
  21 #include "base/memory/scoped_ptr.h"
  22 #include "base/strings/string_number_conversions.h"
  23 #include "base/strings/string_util.h"
  24 #include "base/strings/utf_string_conversions.h"
  25 #include "chromeos/ime/component_extension_ime_manager.h"
  26 #include "chromeos/ime/composition_text.h"
  27 #include "chromeos/ime/extension_ime_util.h"
  28 #include "chromeos/ime/input_method_manager.h"
  29 #include "ui/aura/window.h"
  30 #include "ui/aura/window_tree_host.h"
  31 #include "ui/base/ime/candidate_window.h"
  32 #include "ui/base/ime/chromeos/ime_keymap.h"
  33 #include "ui/events/event.h"
  34 #include "ui/events/event_processor.h"
  35 #include "ui/events/keycodes/dom4/keycode_converter.h"
  36 #include "ui/events/keycodes/keyboard_code_conversion_x.h"
  37 #include "ui/keyboard/keyboard_controller.h"
  38 #include "ui/keyboard/keyboard_util.h"
  39
  40 namespace chromeos {
  41 const char* kErrorNotActive = "IME is not active";
  42 const char* kErrorWrongContext = "Context is not active";
  43 const char* kCandidateNotFound = "Candidate not found";
  44
  45 namespace {
  46
  47 // Notifies InputContextHandler that the composition is changed.
  48 void UpdateComposition(const CompositionText& composition_text,
  49                        uint32 cursor_pos,
  50                        bool is_visible) {
  51   IMEInputContextHandlerInterface* input_context =
  52       IMEBridge::Get()->GetInputContextHandler();
  53   if (input_context)
  54     input_context->UpdateCompositionText(
  55         composition_text, cursor_pos, is_visible);
  56 }
  57
  58 }  // namespace
  59
  60 InputMethodEngine::InputMethodEngine()
  61     : focused_(false),
  62       active_(false),
  63       context_id_(0),
  64       next_context_id_(1),
  65       composition_text_(new CompositionText()),
  66       composition_cursor_(0),
  67       candidate_window_(new ui::CandidateWindow()),
  68       window_visible_(false),
  69       sent_key_event_(NULL) {}
  70
  71 InputMethodEngine::~InputMethodEngine() {
  72   input_method::InputMethodManager::Get()->RemoveInputMethodExtension(imm_id_);
  73 }
  74
  75 void InputMethodEngine::Initialize(
  76     scoped_ptr<InputMethodEngineInterface::Observer> observer,
  77     const char* engine_name,
  78     const char* extension_id,
  79     const char* engine_id,
  80     const std::vector<std::string>& languages,
  81     const std::vector<std::string>& layouts,
  82     const GURL& options_page,
  83     const GURL& input_view) {
  84   DCHECK(observer) << "Observer must not be null.";
  85
  86   // TODO(komatsu): It is probably better to set observer out of Initialize.
  87   observer_ = observer.Pass();
  88   engine_id_ = engine_id;
  89   extension_id_ = extension_id;
  90
  91   input_method::InputMethodManager* manager =
  92       input_method::InputMethodManager::Get();
  93   ComponentExtensionIMEManager* comp_ext_ime_manager =
  94       manager->GetComponentExtensionIMEManager();
  95
  96   if (comp_ext_ime_manager->IsInitialized() &&
  97       comp_ext_ime_manager->IsWhitelistedExtension(extension_id)) {
  98     imm_id_ = comp_ext_ime_manager->GetId(extension_id, engine_id);
  99   } else {
 100     imm_id_ = extension_ime_util::GetInputMethodID(extension_id, engine_id);
 101   }
 102
 103   input_view_url_ = input_view;
 104   descriptor_ = input_method::InputMethodDescriptor(
 105       imm_id_,
 106       engine_name,
 107       std::string(), // TODO(uekawa): Set short name.
 108       layouts,
 109       languages,
 110       extension_ime_util::IsKeyboardLayoutExtension(
 111           imm_id_), // is_login_keyboard
 112       options_page,
 113       input_view);
 114
 115   // TODO(komatsu): It is probably better to call AddInputMethodExtension
 116   // out of Initialize.
 117   manager->AddInputMethodExtension(imm_id_, this);
 118 }
 119
 120 const input_method::InputMethodDescriptor& InputMethodEngine::GetDescriptor()
 121     const {
 122   return descriptor_;
 123 }
 124
 125 void InputMethodEngine::NotifyImeReady() {
 126   input_method::InputMethodManager* manager =
 127       input_method::InputMethodManager::Get();
 128   if (manager && imm_id_ == manager->GetCurrentInputMethod().id())
 129     Enable();
 130 }
 131
 132 bool InputMethodEngine::SetComposition(
 133     int context_id,
 134     const char* text,
 135     int selection_start,
 136     int selection_end,
 137     int cursor,
 138     const std::vector<SegmentInfo>& segments,
 139     std::string* error) {
 140   if (!active_) {
 141     *error = kErrorNotActive;
 142     return false;
 143   }
 144   if (context_id != context_id_ || context_id_ == -1) {
 145     *error = kErrorWrongContext;
 146     return false;
 147   }
 148
 149   composition_cursor_ = cursor;
 150   composition_text_.reset(new CompositionText());
 151   composition_text_->set_text(base::UTF8ToUTF16(text));
 152
 153   composition_text_->set_selection_start(selection_start);
 154   composition_text_->set_selection_end(selection_end);
 155
 156   // TODO: Add support for displaying selected text in the composition string.
 157   for (std::vector<SegmentInfo>::const_iterator segment = segments.begin();
 158        segment != segments.end(); ++segment) {
 159     CompositionText::UnderlineAttribute underline;
 160
 161     switch (segment->style) {
 162       case SEGMENT_STYLE_UNDERLINE:
 163         underline.type = CompositionText::COMPOSITION_TEXT_UNDERLINE_SINGLE;
 164         break;
 165       case SEGMENT_STYLE_DOUBLE_UNDERLINE:
 166         underline.type = CompositionText::COMPOSITION_TEXT_UNDERLINE_DOUBLE;
 167         break;
 168       default:
 169         continue;
 170     }
 171
 172     underline.start_index = segment->start;
 173     underline.end_index = segment->end;
 174     composition_text_->mutable_underline_attributes()->push_back(underline);
 175   }
 176
 177   // TODO(nona): Makes focus out mode configuable, if necessary.
 178   UpdateComposition(*composition_text_, composition_cursor_, true);
 179   return true;
 180 }
 181
 182 bool InputMethodEngine::ClearComposition(int context_id,
 183                                          std::string* error)  {
 184   if (!active_) {
 185     *error = kErrorNotActive;
 186     return false;
 187   }
 188   if (context_id != context_id_ || context_id_ == -1) {
 189     *error = kErrorWrongContext;
 190     return false;
 191   }
 192
 193   composition_cursor_ = 0;
 194   composition_text_.reset(new CompositionText());
 195   UpdateComposition(*composition_text_, composition_cursor_, false);
 196   return true;
 197 }
 198
 199 bool InputMethodEngine::CommitText(int context_id, const char* text,
 200                                    std::string* error) {
 201   if (!active_) {
 202     // TODO: Commit the text anyways.
 203     *error = kErrorNotActive;
 204     return false;
 205   }
 206   if (context_id != context_id_ || context_id_ == -1) {
 207     *error = kErrorWrongContext;
 208     return false;
 209   }
 210
 211   IMEBridge::Get()->GetInputContextHandler()->CommitText(text);
 212   return true;
 213 }
 214
 215 bool InputMethodEngine::SendKeyEvents(
 216     int context_id,
 217     const std::vector<KeyboardEvent>& events) {
 218   if (!active_) {
 219     return false;
 220   }
 221   // context_id  ==  0, means sending key events to non-input field.
 222   // context_id_ == -1, means the focus is not in an input field.
 223   if ((context_id != 0 && context_id != context_id_) || context_id_ == -1) {
 224     return false;
 225   }
 226
 227   ui::EventProcessor* dispatcher =
 228       ash::Shell::GetPrimaryRootWindow()->GetHost()->event_processor();
 229
 230   for (size_t i = 0; i < events.size(); ++i) {
 231     const KeyboardEvent& event = events[i];
 232     const ui::EventType type =
 233         (event.type == "keyup") ? ui::ET_KEY_RELEASED : ui::ET_KEY_PRESSED;
 234
 235     // KeyboardCodeFromXKyeSym assumes US keyboard layout.
 236     ui::KeycodeConverter* conv = ui::KeycodeConverter::GetInstance();
 237     DCHECK(conv);
 238
 239      // DOM code (KeyA) -> XKB -> XKeySym (XK_A) -> KeyboardCode (VKEY_A)
 240     const uint16 native_keycode =
 241         conv->CodeToNativeKeycode(event.code.c_str());
 242     const uint xkeysym = ui::DefaultXKeysymFromHardwareKeycode(native_keycode);
 243     const ui::KeyboardCode key_code = ui::KeyboardCodeFromXKeysym(xkeysym);
 244
 245     const std::string code = event.code;
 246     int flags = ui::EF_NONE;
 247     flags |= event.alt_key   ? ui::EF_ALT_DOWN       : ui::EF_NONE;
 248     flags |= event.ctrl_key  ? ui::EF_CONTROL_DOWN   : ui::EF_NONE;
 249     flags |= event.shift_key ? ui::EF_SHIFT_DOWN     : ui::EF_NONE;
 250     flags |= event.caps_lock ? ui::EF_CAPS_LOCK_DOWN : ui::EF_NONE;
 251
 252     ui::KeyEvent ui_event(type, key_code, code, flags, false /* is_char */);
 253     base::AutoReset<const ui::KeyEvent*> reset_sent_key(&sent_key_event_,
 254                                                         &ui_event);
 255     ui::EventDispatchDetails details = dispatcher->OnEventFromSource(&ui_event);
 256     if (details.dispatcher_destroyed)
 257       break;
 258   }
 259   return true;
 260 }
 261
 262 const InputMethodEngine::CandidateWindowProperty&
 263 InputMethodEngine::GetCandidateWindowProperty() const {
 264   return candidate_window_property_;
 265 }
 266
 267 void InputMethodEngine::SetCandidateWindowProperty(
 268     const CandidateWindowProperty& property) {
 269   // Type conversion from InputMethodEngineInterface::CandidateWindowProperty to
 270   // CandidateWindow::CandidateWindowProperty defined in chromeos/ime/.
 271   ui::CandidateWindow::CandidateWindowProperty dest_property;
 272   dest_property.page_size = property.page_size;
 273   dest_property.is_cursor_visible = property.is_cursor_visible;
 274   dest_property.is_vertical = property.is_vertical;
 275   dest_property.show_window_at_composition =
 276       property.show_window_at_composition;
 277   dest_property.cursor_position =
 278       candidate_window_->GetProperty().cursor_position;
 279   dest_property.auxiliary_text = property.auxiliary_text;
 280   dest_property.is_auxiliary_text_visible = property.is_auxiliary_text_visible;
 281
 282   candidate_window_->SetProperty(dest_property);
 283   candidate_window_property_ = property;
 284
 285   if (active_) {
 286     IMECandidateWindowHandlerInterface* cw_handler =
 287         IMEBridge::Get()->GetCandidateWindowHandler();
 288     if (cw_handler)
 289       cw_handler->UpdateLookupTable(*candidate_window_, window_visible_);
 290   }
 291 }
 292
 293 bool InputMethodEngine::SetCandidateWindowVisible(bool visible,
 294                                                   std::string* error) {
 295   if (!active_) {
 296     *error = kErrorNotActive;
 297     return false;
 298   }
 299
 300   window_visible_ = visible;
 301   IMECandidateWindowHandlerInterface* cw_handler =
 302       IMEBridge::Get()->GetCandidateWindowHandler();
 303   if (cw_handler)
 304     cw_handler->UpdateLookupTable(*candidate_window_, window_visible_);
 305   return true;
 306 }
 307
 308 bool InputMethodEngine::SetCandidates(
 309     int context_id,
 310     const std::vector<Candidate>& candidates,
 311     std::string* error) {
 312   if (!active_) {
 313     *error = kErrorNotActive;
 314     return false;
 315   }
 316   if (context_id != context_id_ || context_id_ == -1) {
 317     *error = kErrorWrongContext;
 318     return false;
 319   }
 320
 321   // TODO: Nested candidates
 322   candidate_ids_.clear();
 323   candidate_indexes_.clear();
 324   candidate_window_->mutable_candidates()->clear();
 325   for (std::vector<Candidate>::const_iterator ix = candidates.begin();
 326        ix != candidates.end(); ++ix) {
 327     ui::CandidateWindow::Entry entry;
 328     entry.value = base::UTF8ToUTF16(ix->value);
 329     entry.label = base::UTF8ToUTF16(ix->label);
 330     entry.annotation = base::UTF8ToUTF16(ix->annotation);
 331     entry.description_title = base::UTF8ToUTF16(ix->usage.title);
 332     entry.description_body = base::UTF8ToUTF16(ix->usage.body);
 333
 334     // Store a mapping from the user defined ID to the candidate index.
 335     candidate_indexes_[ix->id] = candidate_ids_.size();
 336     candidate_ids_.push_back(ix->id);
 337
 338     candidate_window_->mutable_candidates()->push_back(entry);
 339   }
 340   if (active_) {
 341     IMECandidateWindowHandlerInterface* cw_handler =
 342         IMEBridge::Get()->GetCandidateWindowHandler();
 343     if (cw_handler)
 344       cw_handler->UpdateLookupTable(*candidate_window_, window_visible_);
 345   }
 346   return true;
 347 }
 348
 349 bool InputMethodEngine::SetCursorPosition(int context_id, int candidate_id,
 350                                           std::string* error) {
 351   if (!active_) {
 352     *error = kErrorNotActive;
 353     return false;
 354   }
 355   if (context_id != context_id_ || context_id_ == -1) {
 356     *error = kErrorWrongContext;
 357     return false;
 358   }
 359
 360   std::map<int, int>::const_iterator position =
 361       candidate_indexes_.find(candidate_id);
 362   if (position == candidate_indexes_.end()) {
 363     *error = kCandidateNotFound;
 364     return false;
 365   }
 366
 367   candidate_window_->set_cursor_position(position->second);
 368   IMECandidateWindowHandlerInterface* cw_handler =
 369       IMEBridge::Get()->GetCandidateWindowHandler();
 370   if (cw_handler)
 371     cw_handler->UpdateLookupTable(*candidate_window_, window_visible_);
 372   return true;
 373 }
 374
 375 bool InputMethodEngine::SetMenuItems(const std::vector<MenuItem>& items) {
 376   return UpdateMenuItems(items);
 377 }
 378
 379 bool InputMethodEngine::UpdateMenuItems(
 380     const std::vector<MenuItem>& items) {
 381   if (!active_)
 382     return false;
 383
 384   ash::ime::InputMethodMenuItemList menu_item_list;
 385   for (std::vector<MenuItem>::const_iterator item = items.begin();
 386        item != items.end(); ++item) {
 387     ash::ime::InputMethodMenuItem property;
 388     MenuItemToProperty(*item, &property);
 389     menu_item_list.push_back(property);
 390   }
 391
 392   ash::ime::InputMethodMenuManager::GetInstance()->
 393       SetCurrentInputMethodMenuItemList(
 394           menu_item_list);
 395   return true;
 396 }
 397
 398 bool InputMethodEngine::IsActive() const {
 399   return active_;
 400 }
 401
 402 void InputMethodEngine::KeyEventDone(input_method::KeyEventHandle* key_data,
 403                                      bool handled) {
 404   KeyEventDoneCallback* callback =
 405       reinterpret_cast<KeyEventDoneCallback*>(key_data);
 406   callback->Run(handled);
 407   delete callback;
 408 }
 409
 410 bool InputMethodEngine::DeleteSurroundingText(int context_id,
 411                                               int offset,
 412                                               size_t number_of_chars,
 413                                               std::string* error) {
 414   if (!active_) {
 415     *error = kErrorNotActive;
 416     return false;
 417   }
 418   if (context_id != context_id_ || context_id_ == -1) {
 419     *error = kErrorWrongContext;
 420     return false;
 421   }
 422
 423   if (offset < 0 && static_cast<size_t>(-1 * offset) != size_t(number_of_chars))
 424     return false;  // Currently we can only support preceding text.
 425
 426   // TODO(nona): Return false if there is ongoing composition.
 427
 428   IMEInputContextHandlerInterface* input_context =
 429       IMEBridge::Get()->GetInputContextHandler();
 430   if (input_context)
 431     input_context->DeleteSurroundingText(offset, number_of_chars);
 432
 433   return true;
 434 }
 435
 436 void InputMethodEngine::HideInputView() {
 437   keyboard::KeyboardController* keyboard_controller =
 438     ash::Shell::GetInstance()->keyboard_controller();
 439   if (keyboard_controller) {
 440     keyboard_controller->HideKeyboard(
 441         keyboard::KeyboardController::HIDE_REASON_MANUAL);
 442   }
 443 }
 444
 445 void InputMethodEngine::FocusIn(
 446     const IMEEngineHandlerInterface::InputContext& input_context) {
 447   focused_ = true;
 448   if (!active_)
 449     return;
 450   context_id_ = next_context_id_;
 451   ++next_context_id_;
 452
 453   InputMethodEngineInterface::InputContext context;
 454   context.id = context_id_;
 455   switch (input_context.type) {
 456     case ui::TEXT_INPUT_TYPE_SEARCH:
 457       context.type = "search";
 458       break;
 459     case ui::TEXT_INPUT_TYPE_TELEPHONE:
 460       context.type = "tel";
 461       break;
 462     case ui::TEXT_INPUT_TYPE_URL:
 463       context.type = "url";
 464       break;
 465     case ui::TEXT_INPUT_TYPE_EMAIL:
 466       context.type = "email";
 467       break;
 468     case ui::TEXT_INPUT_TYPE_NUMBER:
 469       context.type = "number";
 470       break;
 471     default:
 472       context.type = "text";
 473       break;
 474   }
 475
 476   observer_->OnFocus(context);
 477 }
 478
 479 void InputMethodEngine::FocusOut() {
 480   focused_ = false;
 481   if (!active_)
 482     return;
 483   int context_id = context_id_;
 484   context_id_ = -1;
 485   observer_->OnBlur(context_id);
 486 }
 487
 488 void InputMethodEngine::Enable() {
 489   active_ = true;
 490   observer_->OnActivate(engine_id_);
 491   IMEEngineHandlerInterface::InputContext context(ui::TEXT_INPUT_TYPE_TEXT,
 492                                                   ui::TEXT_INPUT_MODE_DEFAULT);
 493   FocusIn(context);
 494
 495   keyboard::SetOverrideContentUrl(input_view_url_);
 496   keyboard::KeyboardController* keyboard_controller =
 497       ash::Shell::GetInstance()->keyboard_controller();
 498   if (keyboard_controller)
 499     keyboard_controller->Reload();
 500 }
 501
 502 void InputMethodEngine::Disable() {
 503   active_ = false;
 504   observer_->OnDeactivated(engine_id_);
 505
 506   GURL empty_url;
 507   keyboard::SetOverrideContentUrl(empty_url);
 508   keyboard::KeyboardController* keyboard_controller =
 509       ash::Shell::GetInstance()->keyboard_controller();
 510   if (keyboard_controller)
 511     keyboard_controller->Reload();
 512 }
 513
 514 void InputMethodEngine::PropertyActivate(const std::string& property_name) {
 515   observer_->OnMenuItemActivated(engine_id_, property_name);
 516 }
 517
 518 void InputMethodEngine::Reset() {
 519   observer_->OnReset(engine_id_);
 520 }
 521
 522 namespace {
 523 void GetExtensionKeyboardEventFromKeyEvent(
 524     const ui::KeyEvent& event,
 525     InputMethodEngine::KeyboardEvent* ext_event) {
 526   DCHECK(event.type() == ui::ET_KEY_RELEASED ||
 527          event.type() == ui::ET_KEY_PRESSED);
 528   DCHECK(ext_event);
 529   ext_event->type = (event.type() == ui::ET_KEY_RELEASED) ? "keyup" : "keydown";
 530
 531   ext_event->code = event.code();
 532   ext_event->alt_key = event.IsAltDown();
 533   ext_event->ctrl_key = event.IsControlDown();
 534   ext_event->shift_key = event.IsShiftDown();
 535   ext_event->caps_lock = event.IsCapsLockDown();
 536
 537   uint32 x11_keysym = 0;
 538   if (event.HasNativeEvent()) {
 539     const base::NativeEvent& native_event = event.native_event();
 540     DCHECK(native_event);
 541
 542     XKeyEvent* x_key = &(static_cast<XEvent*>(native_event)->xkey);
 543     KeySym keysym = NoSymbol;
 544     ::XLookupString(x_key, NULL, 0, &keysym, NULL);
 545     x11_keysym = keysym;
 546   } else {
 547     // Convert ui::KeyEvent.key_code to DOM UIEvent key.
 548     // XKeysymForWindowsKeyCode converts key_code to XKeySym, but it
 549     // assumes US layout and does not care about CapLock state.
 550     //
 551     // TODO(komatsu): Support CapsLock states.
 552     // TODO(komatsu): Support non-us keyboard layouts.
 553     x11_keysym = ui::XKeysymForWindowsKeyCode(event.key_code(),
 554                                               event.IsShiftDown());
 555   }
 556   ext_event->key = ui::FromXKeycodeToKeyValue(x11_keysym);
 557 }
 558 }  // namespace
 559
 560 void InputMethodEngine::ProcessKeyEvent(
 561     const ui::KeyEvent& key_event,
 562     const KeyEventDoneCallback& callback) {
 563
 564   KeyEventDoneCallback *handler = new KeyEventDoneCallback();
 565   *handler = callback;
 566
 567   KeyboardEvent ext_event;
 568   GetExtensionKeyboardEventFromKeyEvent(key_event, &ext_event);
 569
 570   // If the given key event is equal to the key event sent by
 571   // SendKeyEvents, this engine ID is propagated to the extension IME.
 572   // Note, this check relies on that ui::KeyEvent is propagated as
 573   // reference without copying.
 574   if (&key_event == sent_key_event_)
 575     ext_event.extension_id = extension_id_;
 576
 577   observer_->OnKeyEvent(
 578       engine_id_,
 579       ext_event,
 580       reinterpret_cast<input_method::KeyEventHandle*>(handler));
 581 }
 582
 583 void InputMethodEngine::CandidateClicked(uint32 index) {
 584   if (index > candidate_ids_.size()) {
 585     return;
 586   }
 587
 588   // Only left button click is supported at this moment.
 589   observer_->OnCandidateClicked(
 590       engine_id_, candidate_ids_.at(index), MOUSE_BUTTON_LEFT);
 591 }
 592
 593 void InputMethodEngine::SetSurroundingText(const std::string& text,
 594                                            uint32 cursor_pos,
 595                                            uint32 anchor_pos) {
 596   observer_->OnSurroundingTextChanged(engine_id_,
 597                                       text,
 598                                       static_cast<int>(cursor_pos),
 599                                       static_cast<int>(anchor_pos));
 600 }
 601
 602 // TODO(uekawa): rename this method to a more reasonable name.
 603 void InputMethodEngine::MenuItemToProperty(
 604     const MenuItem& item,
 605     ash::ime::InputMethodMenuItem* property) {
 606   property->key = item.id;
 607
 608   if (item.modified & MENU_ITEM_MODIFIED_LABEL) {
 609     property->label = item.label;
 610   }
 611   if (item.modified & MENU_ITEM_MODIFIED_VISIBLE) {
 612     // TODO(nona): Implement it.
 613   }
 614   if (item.modified & MENU_ITEM_MODIFIED_CHECKED) {
 615     property->is_selection_item_checked = item.checked;
 616   }
 617   if (item.modified & MENU_ITEM_MODIFIED_ENABLED) {
 618     // TODO(nona): implement sensitive entry(crbug.com/140192).
 619   }
 620   if (item.modified & MENU_ITEM_MODIFIED_STYLE) {
 621     if (!item.children.empty()) {
 622       // TODO(nona): Implement it.
 623     } else {
 624       switch (item.style) {
 625         case MENU_ITEM_STYLE_NONE:
 626           NOTREACHED();
 627           break;
 628         case MENU_ITEM_STYLE_CHECK:
 629           // TODO(nona): Implement it.
 630           break;
 631         case MENU_ITEM_STYLE_RADIO:
 632           property->is_selection_item = true;
 633           break;
 634         case MENU_ITEM_STYLE_SEPARATOR:
 635           // TODO(nona): Implement it.
 636           break;
 637       }
 638     }
 639   }
 640
 641   // TODO(nona): Support item.children.
 642 }
 643
 644 }  // namespace chromeos