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 #undef FocusIn
   8 #undef FocusOut
   9 #undef RootWindow
  10 #include <map>
  11
  12 #include "ash/shell.h"
  13 #include "base/logging.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/metrics/histogram.h"
  16 #include "base/strings/string_number_conversions.h"
  17 #include "base/strings/string_util.h"
  18 #include "base/strings/stringprintf.h"
  19 #include "base/strings/utf_string_conversions.h"
  20 #include "chrome/browser/profiles/profile_manager.h"
  21 #include "ui/aura/window.h"
  22 #include "ui/aura/window_tree_host.h"
  23 #include "ui/base/ime/candidate_window.h"
  24 #include "ui/base/ime/chromeos/component_extension_ime_manager.h"
  25 #include "ui/base/ime/chromeos/composition_text_chromeos.h"
  26 #include "ui/base/ime/chromeos/extension_ime_util.h"
  27 #include "ui/base/ime/chromeos/ime_keymap.h"
  28 #include "ui/base/ime/chromeos/input_method_manager.h"
  29 #include "ui/base/ime/text_input_flags.h"
  30 #include "ui/chromeos/ime/input_method_menu_item.h"
  31 #include "ui/chromeos/ime/input_method_menu_manager.h"
  32 #include "ui/events/event.h"
  33 #include "ui/events/event_processor.h"
  34 #include "ui/events/event_utils.h"
  35 #include "ui/events/keycodes/dom/dom_code.h"
  36 #include "ui/events/keycodes/dom/keycode_converter.h"
  37 #include "ui/keyboard/keyboard_controller.h"
  38 #include "ui/keyboard/keyboard_util.h"
  39
  40 namespace chromeos {
  41
  42 namespace {
  43
  44 const char kErrorNotActive[] = "IME is not active";
  45 const char kErrorWrongContext[] = "Context is not active";
  46 const char kCandidateNotFound[] = "Candidate not found";
  47
  48 // Notifies InputContextHandler that the composition is changed.
  49 void UpdateComposition(const CompositionText& composition_text,
  50                        uint32 cursor_pos,
  51                        bool is_visible) {
  52   IMEInputContextHandlerInterface* input_context =
  53       IMEBridge::Get()->GetInputContextHandler();
  54   if (input_context)
  55     input_context->UpdateCompositionText(
  56         composition_text, cursor_pos, is_visible);
  57 }
  58
  59 // Returns the length of characters of a UTF-8 string with unknown string
  60 // length. Cannot apply faster algorithm to count characters in an utf-8
  61 // string without knowing the string length,  so just does a full scan.
  62 size_t GetUtf8StringLength(const char* s) {
  63   size_t ret = 0;
  64   while (*s) {
  65     if ((*s & 0xC0) != 0x80)
  66       ret++;
  67     ++s;
  68   }
  69   return ret;
  70 }
  71
  72 std::string GetKeyFromEvent(const ui::KeyEvent& event) {
  73   const std::string code = event.GetCodeString();
  74   if (base::StartsWith(code, "Control", base::CompareCase::SENSITIVE))
  75     return "Ctrl";
  76   if (base::StartsWith(code, "Shift", base::CompareCase::SENSITIVE))
  77     return "Shift";
  78   if (base::StartsWith(code, "Alt", base::CompareCase::SENSITIVE))
  79     return "Alt";
  80   if (base::StartsWith(code, "Arrow", base::CompareCase::SENSITIVE))
  81     return code.substr(5);
  82   if (code == "Escape")
  83     return "Esc";
  84   if (code == "Backspace" || code == "Tab" ||
  85       code == "Enter" || code == "CapsLock" ||
  86       code == "Power")
  87     return code;
  88   // Cases for media keys.
  89   switch (event.key_code()) {
  90     case ui::VKEY_BROWSER_BACK:
  91     case ui::VKEY_F1:
  92       return "HistoryBack";
  93     case ui::VKEY_BROWSER_FORWARD:
  94     case ui::VKEY_F2:
  95       return "HistoryForward";
  96     case ui::VKEY_BROWSER_REFRESH:
  97     case ui::VKEY_F3:
  98       return "BrowserRefresh";
  99     case ui::VKEY_MEDIA_LAUNCH_APP2:
 100     case ui::VKEY_F4:
 101       return "ChromeOSFullscreen";
 102     case ui::VKEY_MEDIA_LAUNCH_APP1:
 103     case ui::VKEY_F5:
 104       return "ChromeOSSwitchWindow";
 105     case ui::VKEY_BRIGHTNESS_DOWN:
 106     case ui::VKEY_F6:
 107       return "BrightnessDown";
 108     case ui::VKEY_BRIGHTNESS_UP:
 109     case ui::VKEY_F7:
 110       return "BrightnessUp";
 111     case ui::VKEY_VOLUME_MUTE:
 112     case ui::VKEY_F8:
 113       return "AudioVolumeMute";
 114     case ui::VKEY_VOLUME_DOWN:
 115     case ui::VKEY_F9:
 116       return "AudioVolumeDown";
 117     case ui::VKEY_VOLUME_UP:
 118     case ui::VKEY_F10:
 119       return "AudioVolumeUp";
 120     default:
 121       break;
 122   }
 123   uint16 ch = 0;
 124   // Ctrl+? cases, gets key value for Ctrl is not down.
 125   if (event.flags() & ui::EF_CONTROL_DOWN) {
 126     ui::KeyEvent event_no_ctrl(event.type(),
 127                                event.key_code(),
 128                                event.flags() ^ ui::EF_CONTROL_DOWN);
 129     ch = event_no_ctrl.GetCharacter();
 130   } else {
 131     ch = event.GetCharacter();
 132   }
 133   return base::UTF16ToUTF8(base::string16(1, ch));
 134 }
 135
 136 void GetExtensionKeyboardEventFromKeyEvent(
 137     const ui::KeyEvent& event,
 138     InputMethodEngine::KeyboardEvent* ext_event) {
 139   DCHECK(event.type() == ui::ET_KEY_RELEASED ||
 140          event.type() == ui::ET_KEY_PRESSED);
 141   DCHECK(ext_event);
 142   ext_event->type = (event.type() == ui::ET_KEY_RELEASED) ? "keyup" : "keydown";
 143
 144   if (event.code() == ui::DomCode::NONE)
 145     ext_event->code = ui::KeyboardCodeToDomKeycode(event.key_code());
 146   else
 147     ext_event->code = event.GetCodeString();
 148   ext_event->key_code = static_cast<int>(event.key_code());
 149   ext_event->alt_key = event.IsAltDown();
 150   ext_event->ctrl_key = event.IsControlDown();
 151   ext_event->shift_key = event.IsShiftDown();
 152   ext_event->caps_lock = event.IsCapsLockDown();
 153   ext_event->key = GetKeyFromEvent(event);
 154 }
 155
 156 }  // namespace
 157
 158 InputMethodEngine::InputMethodEngine()
 159     : current_input_type_(ui::TEXT_INPUT_TYPE_NONE),
 160       context_id_(0),
 161       next_context_id_(1),
 162       composition_text_(new CompositionText()),
 163       composition_cursor_(0),
 164       candidate_window_(new ui::CandidateWindow()),
 165       window_visible_(false),
 166       sent_key_event_(NULL),
 167       profile_(NULL) {
 168 }
 169
 170 InputMethodEngine::~InputMethodEngine() {
 171 }
 172
 173 void InputMethodEngine::Initialize(
 174     scoped_ptr<InputMethodEngineInterface::Observer> observer,
 175     const char* extension_id,
 176     Profile* profile) {
 177   DCHECK(observer) << "Observer must not be null.";
 178
 179   // TODO(komatsu): It is probably better to set observer out of Initialize.
 180   observer_ = observer.Pass();
 181   extension_id_ = extension_id;
 182   profile_ = profile;
 183 }
 184
 185 const std::string& InputMethodEngine::GetActiveComponentId() const {
 186   return active_component_id_;
 187 }
 188
 189 bool InputMethodEngine::SetComposition(
 190     int context_id,
 191     const char* text,
 192     int selection_start,
 193     int selection_end,
 194     int cursor,
 195     const std::vector<SegmentInfo>& segments,
 196     std::string* error) {
 197   if (!IsActive()) {
 198     *error = kErrorNotActive;
 199     return false;
 200   }
 201   if (context_id != context_id_ || context_id_ == -1) {
 202     *error = kErrorWrongContext;
 203     return false;
 204   }
 205
 206   composition_cursor_ = cursor;
 207   composition_text_.reset(new CompositionText());
 208   composition_text_->set_text(base::UTF8ToUTF16(text));
 209
 210   composition_text_->set_selection_start(selection_start);
 211   composition_text_->set_selection_end(selection_end);
 212
 213   // TODO: Add support for displaying selected text in the composition string.
 214   for (std::vector<SegmentInfo>::const_iterator segment = segments.begin();
 215        segment != segments.end(); ++segment) {
 216     CompositionText::UnderlineAttribute underline;
 217
 218     switch (segment->style) {
 219       case SEGMENT_STYLE_UNDERLINE:
 220         underline.type = CompositionText::COMPOSITION_TEXT_UNDERLINE_SINGLE;
 221         break;
 222       case SEGMENT_STYLE_DOUBLE_UNDERLINE:
 223         underline.type = CompositionText::COMPOSITION_TEXT_UNDERLINE_DOUBLE;
 224         break;
 225       case SEGMENT_STYLE_NO_UNDERLINE:
 226         underline.type = CompositionText::COMPOSITION_TEXT_UNDERLINE_NONE;
 227         break;
 228       default:
 229         continue;
 230     }
 231
 232     underline.start_index = segment->start;
 233     underline.end_index = segment->end;
 234     composition_text_->mutable_underline_attributes()->push_back(underline);
 235   }
 236
 237   // TODO(nona): Makes focus out mode configuable, if necessary.
 238   UpdateComposition(*composition_text_, composition_cursor_, true);
 239   return true;
 240 }
 241
 242 bool InputMethodEngine::ClearComposition(int context_id,
 243                                          std::string* error)  {
 244   if (!IsActive()) {
 245     *error = kErrorNotActive;
 246     return false;
 247   }
 248   if (context_id != context_id_ || context_id_ == -1) {
 249     *error = kErrorWrongContext;
 250     return false;
 251   }
 252
 253   composition_cursor_ = 0;
 254   composition_text_.reset(new CompositionText());
 255   UpdateComposition(*composition_text_, composition_cursor_, false);
 256   return true;
 257 }
 258
 259 bool InputMethodEngine::CommitText(int context_id, const char* text,
 260                                    std::string* error) {
 261   if (!IsActive()) {
 262     // TODO: Commit the text anyways.
 263     *error = kErrorNotActive;
 264     return false;
 265   }
 266   if (context_id != context_id_ || context_id_ == -1) {
 267     *error = kErrorWrongContext;
 268     return false;
 269   }
 270
 271   IMEBridge::Get()->GetInputContextHandler()->CommitText(text);
 272
 273   // Records histograms for committed characters.
 274   if (!composition_text_->text().empty()) {
 275     size_t len = GetUtf8StringLength(text);
 276     UMA_HISTOGRAM_CUSTOM_COUNTS("InputMethod.CommitLength",
 277                                 len, 1, 25, 25);
 278     composition_text_.reset(new CompositionText());
 279   }
 280   return true;
 281 }
 282
 283 bool InputMethodEngine::SendKeyEvents(
 284     int context_id,
 285     const std::vector<KeyboardEvent>& events) {
 286   if (!IsActive()) {
 287     return false;
 288   }
 289   // context_id  ==  0, means sending key events to non-input field.
 290   // context_id_ == -1, means the focus is not in an input field.
 291   if (context_id != 0 && (context_id != context_id_ || context_id_ == -1)) {
 292     return false;
 293   }
 294
 295   ui::EventProcessor* dispatcher =
 296       ash::Shell::GetPrimaryRootWindow()->GetHost()->event_processor();
 297
 298   for (size_t i = 0; i < events.size(); ++i) {
 299     const KeyboardEvent& event = events[i];
 300     const ui::EventType type =
 301         (event.type == "keyup") ? ui::ET_KEY_RELEASED : ui::ET_KEY_PRESSED;
 302     ui::KeyboardCode key_code = static_cast<ui::KeyboardCode>(event.key_code);
 303     if (key_code == ui::VKEY_UNKNOWN)
 304       key_code = ui::DomKeycodeToKeyboardCode(event.code);
 305
 306     int flags = ui::EF_NONE;
 307     flags |= event.alt_key   ? ui::EF_ALT_DOWN       : ui::EF_NONE;
 308     flags |= event.ctrl_key  ? ui::EF_CONTROL_DOWN   : ui::EF_NONE;
 309     flags |= event.shift_key ? ui::EF_SHIFT_DOWN     : ui::EF_NONE;
 310     flags |= event.caps_lock ? ui::EF_CAPS_LOCK_DOWN : ui::EF_NONE;
 311
 312     base::char16 ch = 0;
 313     // 4-bytes UTF-8 string is at least 2-characters UTF-16 string.
 314     // And Key char can only be single UTF-16 character.
 315     if (!event.key.empty() && event.key.size() < 4) {
 316       base::string16 key_char = base::UTF8ToUTF16(event.key);
 317       if (key_char.size() == 1)
 318         ch = key_char[0];
 319     }
 320     ui::KeyEvent ui_event(
 321         type, key_code,
 322         ui::KeycodeConverter::CodeStringToDomCode(event.code.c_str()), flags,
 323         ui::KeycodeConverter::KeyStringToDomKey(event.key.c_str()), ch,
 324         ui::EventTimeForNow());
 325     base::AutoReset<const ui::KeyEvent*> reset_sent_key(&sent_key_event_,
 326                                                         &ui_event);
 327     ui::EventDispatchDetails details = dispatcher->OnEventFromSource(&ui_event);
 328     if (details.dispatcher_destroyed)
 329       break;
 330   }
 331
 332   return true;
 333 }
 334
 335 const InputMethodEngine::CandidateWindowProperty&
 336 InputMethodEngine::GetCandidateWindowProperty() const {
 337   return candidate_window_property_;
 338 }
 339
 340 void InputMethodEngine::SetCandidateWindowProperty(
 341     const CandidateWindowProperty& property) {
 342   // Type conversion from InputMethodEngineInterface::CandidateWindowProperty to
 343   // CandidateWindow::CandidateWindowProperty defined in chromeos/ime/.
 344   ui::CandidateWindow::CandidateWindowProperty dest_property;
 345   dest_property.page_size = property.page_size;
 346   dest_property.is_cursor_visible = property.is_cursor_visible;
 347   dest_property.is_vertical = property.is_vertical;
 348   dest_property.show_window_at_composition =
 349       property.show_window_at_composition;
 350   dest_property.cursor_position =
 351       candidate_window_->GetProperty().cursor_position;
 352   dest_property.auxiliary_text = property.auxiliary_text;
 353   dest_property.is_auxiliary_text_visible = property.is_auxiliary_text_visible;
 354
 355   candidate_window_->SetProperty(dest_property);
 356   candidate_window_property_ = property;
 357
 358   if (IsActive()) {
 359     IMECandidateWindowHandlerInterface* cw_handler =
 360         IMEBridge::Get()->GetCandidateWindowHandler();
 361     if (cw_handler)
 362       cw_handler->UpdateLookupTable(*candidate_window_, window_visible_);
 363   }
 364 }
 365
 366 bool InputMethodEngine::SetCandidateWindowVisible(bool visible,
 367                                                   std::string* error) {
 368   if (!IsActive()) {
 369     *error = kErrorNotActive;
 370     return false;
 371   }
 372
 373   window_visible_ = visible;
 374   IMECandidateWindowHandlerInterface* cw_handler =
 375       IMEBridge::Get()->GetCandidateWindowHandler();
 376   if (cw_handler)
 377     cw_handler->UpdateLookupTable(*candidate_window_, window_visible_);
 378   return true;
 379 }
 380
 381 bool InputMethodEngine::SetCandidates(
 382     int context_id,
 383     const std::vector<Candidate>& candidates,
 384     std::string* error) {
 385   if (!IsActive()) {
 386     *error = kErrorNotActive;
 387     return false;
 388   }
 389   if (context_id != context_id_ || context_id_ == -1) {
 390     *error = kErrorWrongContext;
 391     return false;
 392   }
 393
 394   // TODO: Nested candidates
 395   candidate_ids_.clear();
 396   candidate_indexes_.clear();
 397   candidate_window_->mutable_candidates()->clear();
 398   for (std::vector<Candidate>::const_iterator ix = candidates.begin();
 399        ix != candidates.end(); ++ix) {
 400     ui::CandidateWindow::Entry entry;
 401     entry.value = base::UTF8ToUTF16(ix->value);
 402     entry.label = base::UTF8ToUTF16(ix->label);
 403     entry.annotation = base::UTF8ToUTF16(ix->annotation);
 404     entry.description_title = base::UTF8ToUTF16(ix->usage.title);
 405     entry.description_body = base::UTF8ToUTF16(ix->usage.body);
 406
 407     // Store a mapping from the user defined ID to the candidate index.
 408     candidate_indexes_[ix->id] = candidate_ids_.size();
 409     candidate_ids_.push_back(ix->id);
 410
 411     candidate_window_->mutable_candidates()->push_back(entry);
 412   }
 413   if (IsActive()) {
 414     IMECandidateWindowHandlerInterface* cw_handler =
 415         IMEBridge::Get()->GetCandidateWindowHandler();
 416     if (cw_handler)
 417       cw_handler->UpdateLookupTable(*candidate_window_, window_visible_);
 418   }
 419   return true;
 420 }
 421
 422 bool InputMethodEngine::SetCursorPosition(int context_id, int candidate_id,
 423                                           std::string* error) {
 424   if (!IsActive()) {
 425     *error = kErrorNotActive;
 426     return false;
 427   }
 428   if (context_id != context_id_ || context_id_ == -1) {
 429     *error = kErrorWrongContext;
 430     return false;
 431   }
 432
 433   std::map<int, int>::const_iterator position =
 434       candidate_indexes_.find(candidate_id);
 435   if (position == candidate_indexes_.end()) {
 436     *error = kCandidateNotFound;
 437     return false;
 438   }
 439
 440   candidate_window_->set_cursor_position(position->second);
 441   IMECandidateWindowHandlerInterface* cw_handler =
 442       IMEBridge::Get()->GetCandidateWindowHandler();
 443   if (cw_handler)
 444     cw_handler->UpdateLookupTable(*candidate_window_, window_visible_);
 445   return true;
 446 }
 447
 448 bool InputMethodEngine::SetMenuItems(const std::vector<MenuItem>& items) {
 449   return UpdateMenuItems(items);
 450 }
 451
 452 bool InputMethodEngine::UpdateMenuItems(
 453     const std::vector<MenuItem>& items) {
 454   if (!IsActive())
 455     return false;
 456
 457   ui::ime::InputMethodMenuItemList menu_item_list;
 458   for (std::vector<MenuItem>::const_iterator item = items.begin();
 459        item != items.end(); ++item) {
 460     ui::ime::InputMethodMenuItem property;
 461     MenuItemToProperty(*item, &property);
 462     menu_item_list.push_back(property);
 463   }
 464
 465   ui::ime::InputMethodMenuManager::GetInstance()->
 466       SetCurrentInputMethodMenuItemList(
 467           menu_item_list);
 468   return true;
 469 }
 470
 471 bool InputMethodEngine::IsActive() const {
 472   return !active_component_id_.empty();
 473 }
 474
 475 bool InputMethodEngine::DeleteSurroundingText(int context_id,
 476                                               int offset,
 477                                               size_t number_of_chars,
 478                                               std::string* error) {
 479   if (!IsActive()) {
 480     *error = kErrorNotActive;
 481     return false;
 482   }
 483   if (context_id != context_id_ || context_id_ == -1) {
 484     *error = kErrorWrongContext;
 485     return false;
 486   }
 487
 488   // TODO(nona): Return false if there is ongoing composition.
 489
 490   IMEInputContextHandlerInterface* input_context =
 491       IMEBridge::Get()->GetInputContextHandler();
 492   if (input_context)
 493     input_context->DeleteSurroundingText(offset, number_of_chars);
 494
 495   return true;
 496 }
 497
 498 void InputMethodEngine::HideInputView() {
 499   keyboard::KeyboardController* keyboard_controller =
 500     keyboard::KeyboardController::GetInstance();
 501   if (keyboard_controller) {
 502     keyboard_controller->HideKeyboard(
 503         keyboard::KeyboardController::HIDE_REASON_MANUAL);
 504   }
 505 }
 506
 507 void InputMethodEngine::SetCompositionBounds(
 508     const std::vector<gfx::Rect>& bounds) {
 509   if (!CheckProfile())
 510     return;
 511   observer_->OnCompositionBoundsChanged(bounds);
 512 }
 513
 514 void InputMethodEngine::EnableInputView() {
 515   keyboard::SetOverrideContentUrl(input_method::InputMethodManager::Get()
 516                                       ->GetActiveIMEState()
 517                                       ->GetCurrentInputMethod()
 518                                       .input_view_url());
 519   keyboard::KeyboardController* keyboard_controller =
 520       keyboard::KeyboardController::GetInstance();
 521   if (keyboard_controller)
 522     keyboard_controller->Reload();
 523 }
 524
 525 void InputMethodEngine::FocusIn(
 526     const IMEEngineHandlerInterface::InputContext& input_context) {
 527   if (!CheckProfile())
 528     return;
 529   current_input_type_ = input_context.type;
 530
 531   if (!IsActive() || current_input_type_ == ui::TEXT_INPUT_TYPE_NONE)
 532     return;
 533
 534   context_id_ = next_context_id_;
 535   ++next_context_id_;
 536
 537   InputMethodEngineInterface::InputContext context;
 538   context.id = context_id_;
 539   switch (current_input_type_) {
 540     case ui::TEXT_INPUT_TYPE_SEARCH:
 541       context.type = "search";
 542       break;
 543     case ui::TEXT_INPUT_TYPE_TELEPHONE:
 544       context.type = "tel";
 545       break;
 546     case ui::TEXT_INPUT_TYPE_URL:
 547       context.type = "url";
 548       break;
 549     case ui::TEXT_INPUT_TYPE_EMAIL:
 550       context.type = "email";
 551       break;
 552     case ui::TEXT_INPUT_TYPE_NUMBER:
 553       context.type = "number";
 554       break;
 555     case ui::TEXT_INPUT_TYPE_PASSWORD:
 556       context.type = "password";
 557       break;
 558     default:
 559       context.type = "text";
 560       break;
 561   }
 562
 563   context.auto_correct =
 564       !(input_context.flags & ui::TEXT_INPUT_FLAG_AUTOCORRECT_OFF);
 565   context.auto_complete =
 566       !(input_context.flags & ui::TEXT_INPUT_FLAG_AUTOCOMPLETE_OFF);
 567   context.spell_check =
 568       !(input_context.flags & ui::TEXT_INPUT_FLAG_SPELLCHECK_OFF);
 569
 570   observer_->OnFocus(context);
 571 }
 572
 573 void InputMethodEngine::FocusOut() {
 574   if (!CheckProfile())
 575     return;
 576   if (!IsActive() || current_input_type_ == ui::TEXT_INPUT_TYPE_NONE)
 577     return;
 578
 579   current_input_type_ = ui::TEXT_INPUT_TYPE_NONE;
 580
 581   int context_id = context_id_;
 582   context_id_ = -1;
 583   observer_->OnBlur(context_id);
 584 }
 585
 586 void InputMethodEngine::Enable(const std::string& component_id) {
 587   if (!CheckProfile())
 588     return;
 589   DCHECK(!component_id.empty());
 590   active_component_id_ = component_id;
 591   observer_->OnActivate(component_id);
 592   const IMEEngineHandlerInterface::InputContext& input_context =
 593       IMEBridge::Get()->GetCurrentInputContext();
 594   current_input_type_ = input_context.type;
 595   FocusIn(input_context);
 596   EnableInputView();
 597 }
 598
 599 void InputMethodEngine::Disable() {
 600   if (!CheckProfile())
 601     return;
 602   active_component_id_.clear();
 603   IMEBridge::Get()->GetInputContextHandler()->CommitText(
 604       base::UTF16ToUTF8(composition_text_->text()));
 605   observer_->OnDeactivated(active_component_id_);
 606 }
 607
 608 void InputMethodEngine::PropertyActivate(const std::string& property_name) {
 609   if (!CheckProfile())
 610     return;
 611   observer_->OnMenuItemActivated(active_component_id_, property_name);
 612 }
 613
 614 void InputMethodEngine::Reset() {
 615   if (!CheckProfile())
 616     return;
 617   composition_text_.reset(new CompositionText());
 618   observer_->OnReset(active_component_id_);
 619 }
 620
 621 bool InputMethodEngine::IsInterestedInKeyEvent() const {
 622   return observer_->IsInterestedInKeyEvent();
 623 }
 624
 625 void InputMethodEngine::ProcessKeyEvent(
 626     const ui::KeyEvent& key_event,
 627     const KeyEventDoneCallback& callback) {
 628   if (!CheckProfile())
 629     return;
 630
 631   KeyEventDoneCallback* handler = new KeyEventDoneCallback();
 632   *handler = callback;
 633
 634   KeyboardEvent ext_event;
 635   GetExtensionKeyboardEventFromKeyEvent(key_event, &ext_event);
 636
 637   // If the given key event is equal to the key event sent by
 638   // SendKeyEvents, this engine ID is propagated to the extension IME.
 639   // Note, this check relies on that ui::KeyEvent is propagated as
 640   // reference without copying.
 641   if (&key_event == sent_key_event_)
 642     ext_event.extension_id = extension_id_;
 643
 644   observer_->OnKeyEvent(
 645       active_component_id_,
 646       ext_event,
 647       reinterpret_cast<input_method::KeyEventHandle*>(handler));
 648 }
 649
 650 void InputMethodEngine::CandidateClicked(uint32 index) {
 651   if (!CheckProfile())
 652     return;
 653   if (index > candidate_ids_.size()) {
 654     return;
 655   }
 656
 657   // Only left button click is supported at this moment.
 658   observer_->OnCandidateClicked(
 659       active_component_id_, candidate_ids_.at(index), MOUSE_BUTTON_LEFT);
 660 }
 661
 662 void InputMethodEngine::SetSurroundingText(const std::string& text,
 663                                            uint32 cursor_pos,
 664                                            uint32 anchor_pos,
 665                                            uint32 offset_pos) {
 666   if (!CheckProfile())
 667     return;
 668   observer_->OnSurroundingTextChanged(
 669       active_component_id_, text, static_cast<int>(cursor_pos),
 670       static_cast<int>(anchor_pos), static_cast<int>(offset_pos));
 671 }
 672
 673 bool InputMethodEngine::CheckProfile() const {
 674   Profile* active_profile = ProfileManager::GetActiveUserProfile();
 675   return active_profile == profile_ || profile_->IsSameProfile(active_profile);
 676 }
 677
 678 // TODO(uekawa): rename this method to a more reasonable name.
 679 void InputMethodEngine::MenuItemToProperty(
 680     const MenuItem& item,
 681     ui::ime::InputMethodMenuItem* property) {
 682   property->key = item.id;
 683
 684   if (item.modified & MENU_ITEM_MODIFIED_LABEL) {
 685     property->label = item.label;
 686   }
 687   if (item.modified & MENU_ITEM_MODIFIED_VISIBLE) {
 688     // TODO(nona): Implement it.
 689   }
 690   if (item.modified & MENU_ITEM_MODIFIED_CHECKED) {
 691     property->is_selection_item_checked = item.checked;
 692   }
 693   if (item.modified & MENU_ITEM_MODIFIED_ENABLED) {
 694     // TODO(nona): implement sensitive entry(crbug.com/140192).
 695   }
 696   if (item.modified & MENU_ITEM_MODIFIED_STYLE) {
 697     if (!item.children.empty()) {
 698       // TODO(nona): Implement it.
 699     } else {
 700       switch (item.style) {
 701         case MENU_ITEM_STYLE_NONE:
 702           NOTREACHED();
 703           break;
 704         case MENU_ITEM_STYLE_CHECK:
 705           // TODO(nona): Implement it.
 706           break;
 707         case MENU_ITEM_STYLE_RADIO:
 708           property->is_selection_item = true;
 709           break;
 710         case MENU_ITEM_STYLE_SEPARATOR:
 711           // TODO(nona): Implement it.
 712           break;
 713       }
 714     }
 715   }
 716
 717   // TODO(nona): Support item.children.
 718 }
 719
 720 }  // namespace chromeos