chrome/browser/chromeos/input_method/input_method_manager_impl.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/chromeos/input_method/input_method_manager_impl.h"
   6
   7 #include <algorithm>  // std::find
   8
   9 #include <sstream>
  10
  11 #include "base/basictypes.h"
  12 #include "base/bind.h"
  13 #include "base/hash.h"
  14 #include "base/location.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "base/metrics/histogram.h"
  17 #include "base/metrics/sparse_histogram.h"
  18 #include "base/prefs/pref_service.h"
  19 #include "base/strings/string_split.h"
  20 #include "base/strings/string_util.h"
  21 #include "base/strings/stringprintf.h"
  22 #include "base/sys_info.h"
  23 #include "chrome/browser/browser_process.h"
  24 #include "chrome/browser/chromeos/input_method/candidate_window_controller.h"
  25 #include "chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.h"
  26 #include "chrome/browser/chromeos/input_method/input_method_engine.h"
  27 #include "chrome/browser/chromeos/input_method/input_method_switch_recorder.h"
  28 #include "chrome/browser/chromeos/language_preferences.h"
  29 #include "chrome/browser/chromeos/login/session/user_session_manager.h"
  30 #include "chrome/browser/chromeos/profiles/profile_helper.h"
  31 #include "chrome/browser/profiles/profile_manager.h"
  32 #include "chrome/common/pref_names.h"
  33 #include "components/user_manager/user_manager.h"
  34 #include "third_party/icu/source/common/unicode/uloc.h"
  35 #include "ui/base/accelerators/accelerator.h"
  36 #include "ui/base/ime/chromeos/component_extension_ime_manager.h"
  37 #include "ui/base/ime/chromeos/extension_ime_util.h"
  38 #include "ui/base/ime/chromeos/fake_ime_keyboard.h"
  39 #include "ui/base/ime/chromeos/ime_keyboard.h"
  40 #include "ui/base/ime/chromeos/input_method_delegate.h"
  41 #include "ui/chromeos/ime/input_method_menu_item.h"
  42 #include "ui/chromeos/ime/input_method_menu_manager.h"
  43 #include "ui/keyboard/keyboard_controller.h"
  44 #include "ui/keyboard/keyboard_util.h"
  45
  46 namespace chromeos {
  47 namespace input_method {
  48
  49 namespace {
  50
  51 bool Contains(const std::vector<std::string>& container,
  52               const std::string& value) {
  53   return std::find(container.begin(), container.end(), value) !=
  54       container.end();
  55 }
  56
  57 enum InputMethodCategory {
  58   INPUT_METHOD_CATEGORY_UNKNOWN = 0,
  59   INPUT_METHOD_CATEGORY_XKB,  // XKB input methods
  60   INPUT_METHOD_CATEGORY_ZH,   // Chinese input methods
  61   INPUT_METHOD_CATEGORY_JA,   // Japanese input methods
  62   INPUT_METHOD_CATEGORY_KO,   // Korean input methods
  63   INPUT_METHOD_CATEGORY_M17N, // Multilingualization input methods
  64   INPUT_METHOD_CATEGORY_T13N, // Transliteration input methods
  65   INPUT_METHOD_CATEGORY_MAX
  66 };
  67
  68 InputMethodCategory GetInputMethodCategory(const std::string& input_method_id,
  69                                            char* first_char = NULL) {
  70   const std::string component_id =
  71       extension_ime_util::GetComponentIDByInputMethodID(input_method_id);
  72   InputMethodCategory category = INPUT_METHOD_CATEGORY_UNKNOWN;
  73   char ch = 0;
  74   if (base::StartsWith(component_id, "xkb:", base::CompareCase::SENSITIVE)) {
  75     ch = component_id[4];
  76     category = INPUT_METHOD_CATEGORY_XKB;
  77   } else if (base::StartsWith(component_id, "zh-",
  78                               base::CompareCase::SENSITIVE)) {
  79     size_t pos = component_id.find("-t-i0-");
  80     if (pos > 0)
  81       pos += 6;
  82     ch = component_id[pos];
  83     category = INPUT_METHOD_CATEGORY_ZH;
  84   } else if (base::StartsWith(component_id, "nacl_mozc_",
  85                               base::CompareCase::SENSITIVE)) {
  86     ch = component_id[10];
  87     category = INPUT_METHOD_CATEGORY_JA;
  88   } else if (base::StartsWith(component_id, "hangul_",
  89                               base::CompareCase::SENSITIVE)) {
  90     ch = component_id[7];
  91     category = INPUT_METHOD_CATEGORY_KO;
  92   } else if (base::StartsWith(component_id, "vkd_",
  93                               base::CompareCase::SENSITIVE)) {
  94     ch = component_id[4];
  95     category = INPUT_METHOD_CATEGORY_M17N;
  96   } else if (component_id.find("-t-i0-") > 0) {
  97     ch = component_id[0];
  98     category = INPUT_METHOD_CATEGORY_T13N;
  99   }
 100
 101   if (first_char)
 102     *first_char = ch;
 103   return category;
 104 }
 105
 106 }  // namespace
 107
 108 // ------------------------ InputMethodManagerImpl::StateImpl
 109
 110 InputMethodManagerImpl::StateImpl::StateImpl(InputMethodManagerImpl* manager,
 111                                              Profile* profile)
 112     : profile(profile), manager_(manager) {
 113 }
 114
 115 InputMethodManagerImpl::StateImpl::~StateImpl() {
 116 }
 117
 118 void InputMethodManagerImpl::StateImpl::InitFrom(const StateImpl& other) {
 119   previous_input_method = other.previous_input_method;
 120   current_input_method = other.current_input_method;
 121
 122   active_input_method_ids = other.active_input_method_ids;
 123
 124   pending_input_method_id = other.pending_input_method_id;
 125
 126   enabled_extension_imes = other.enabled_extension_imes;
 127   extra_input_methods = other.extra_input_methods;
 128 }
 129
 130 bool InputMethodManagerImpl::StateImpl::IsActive() const {
 131   return manager_->state_.get() == this;
 132 }
 133
 134 std::string InputMethodManagerImpl::StateImpl::Dump() const {
 135   std::ostringstream os;
 136
 137   os << "################# "
 138      << (profile ? profile->GetProfileUserName() : std::string("NULL"))
 139      << " #################\n";
 140
 141   os << "previous_input_method: '"
 142      << previous_input_method.GetPreferredKeyboardLayout() << "'\n";
 143   os << "current_input_method: '"
 144      << current_input_method.GetPreferredKeyboardLayout() << "'\n";
 145   os << "active_input_method_ids (size=" << active_input_method_ids.size()
 146      << "):";
 147   for (size_t i = 0; i < active_input_method_ids.size(); ++i) {
 148     os << " '" << active_input_method_ids[i] << "',";
 149   }
 150   os << "\n";
 151   os << "enabled_extension_imes (size=" << enabled_extension_imes.size()
 152      << "):";
 153   for (size_t i = 0; i < enabled_extension_imes.size(); ++i) {
 154     os << " '" << enabled_extension_imes[i] << "'\n";
 155   }
 156   os << "\n";
 157   os << "extra_input_methods (size=" << extra_input_methods.size() << "):";
 158   for (std::map<std::string, InputMethodDescriptor>::const_iterator it =
 159            extra_input_methods.begin();
 160        it != extra_input_methods.end();
 161        ++it) {
 162     os << " '" << it->first << "' => '" << it->second.id() << "',\n";
 163   }
 164   os << "pending_input_method_id: '" << pending_input_method_id << "'\n";
 165
 166   return os.str();
 167 }
 168
 169 scoped_refptr<InputMethodManager::State>
 170 InputMethodManagerImpl::StateImpl::Clone() const {
 171   scoped_refptr<StateImpl> new_state(new StateImpl(this->manager_, profile));
 172   new_state->InitFrom(*this);
 173   return scoped_refptr<InputMethodManager::State>(new_state.get());
 174 }
 175
 176 scoped_ptr<InputMethodDescriptors>
 177 InputMethodManagerImpl::StateImpl::GetActiveInputMethods() const {
 178   scoped_ptr<InputMethodDescriptors> result(new InputMethodDescriptors);
 179   // Build the active input method descriptors from the active input
 180   // methods cache |active_input_method_ids|.
 181   for (size_t i = 0; i < active_input_method_ids.size(); ++i) {
 182     const std::string& input_method_id = active_input_method_ids[i];
 183     const InputMethodDescriptor* descriptor =
 184         manager_->util_.GetInputMethodDescriptorFromId(input_method_id);
 185     if (descriptor) {
 186       result->push_back(*descriptor);
 187     } else {
 188       std::map<std::string, InputMethodDescriptor>::const_iterator ix =
 189           extra_input_methods.find(input_method_id);
 190       if (ix != extra_input_methods.end())
 191         result->push_back(ix->second);
 192       else
 193         DVLOG(1) << "Descriptor is not found for: " << input_method_id;
 194     }
 195   }
 196   if (result->empty()) {
 197     // Initially |active_input_method_ids| is empty. browser_tests might take
 198     // this path.
 199     result->push_back(
 200         InputMethodUtil::GetFallbackInputMethodDescriptor());
 201   }
 202   return result.Pass();
 203 }
 204
 205 const std::vector<std::string>&
 206 InputMethodManagerImpl::StateImpl::GetActiveInputMethodIds() const {
 207   return active_input_method_ids;
 208 }
 209
 210 size_t InputMethodManagerImpl::StateImpl::GetNumActiveInputMethods() const {
 211   return active_input_method_ids.size();
 212 }
 213
 214 const InputMethodDescriptor*
 215 InputMethodManagerImpl::StateImpl::GetInputMethodFromId(
 216     const std::string& input_method_id) const {
 217   const InputMethodDescriptor* ime =
 218       manager_->util_.GetInputMethodDescriptorFromId(input_method_id);
 219   if (!ime) {
 220     std::map<std::string, InputMethodDescriptor>::const_iterator ix =
 221         extra_input_methods.find(input_method_id);
 222     if (ix != extra_input_methods.end())
 223       ime = &ix->second;
 224   }
 225   return ime;
 226 }
 227
 228 void InputMethodManagerImpl::StateImpl::EnableLoginLayouts(
 229     const std::string& language_code,
 230     const std::vector<std::string>& initial_layouts) {
 231   if (manager_->ui_session_ == STATE_TERMINATING)
 232     return;
 233
 234   // First, hardware keyboard layout should be shown.
 235   std::vector<std::string> candidates =
 236       manager_->util_.GetHardwareLoginInputMethodIds();
 237
 238   // Second, locale based input method should be shown.
 239   // Add input methods associated with the language.
 240   std::vector<std::string> layouts_from_locale;
 241   manager_->util_.GetInputMethodIdsFromLanguageCode(
 242       language_code, kKeyboardLayoutsOnly, &layouts_from_locale);
 243   candidates.insert(candidates.end(), layouts_from_locale.begin(),
 244                     layouts_from_locale.end());
 245
 246   std::vector<std::string> layouts;
 247   // First, add the initial input method ID, if it's requested, to
 248   // layouts, so it appears first on the list of active input
 249   // methods at the input language status menu.
 250   for (size_t i = 0; i < initial_layouts.size(); ++i) {
 251     if (manager_->util_.IsValidInputMethodId(initial_layouts[i])) {
 252       if (manager_->IsLoginKeyboard(initial_layouts[i])) {
 253         layouts.push_back(initial_layouts[i]);
 254       } else {
 255         DVLOG(1)
 256             << "EnableLoginLayouts: ignoring non-login initial keyboard layout:"
 257             << initial_layouts[i];
 258       }
 259     } else if (!initial_layouts[i].empty()) {
 260       DVLOG(1) << "EnableLoginLayouts: ignoring non-keyboard or invalid ID: "
 261                << initial_layouts[i];
 262     }
 263   }
 264
 265   // Add candidates to layouts, while skipping duplicates.
 266   for (size_t i = 0; i < candidates.size(); ++i) {
 267     const std::string& candidate = candidates[i];
 268     // Not efficient, but should be fine, as the two vectors are very
 269     // short (2-5 items).
 270     if (!Contains(layouts, candidate) && manager_->IsLoginKeyboard(candidate))
 271       layouts.push_back(candidate);
 272   }
 273
 274   manager_->MigrateInputMethods(&layouts);
 275   active_input_method_ids.swap(layouts);
 276
 277   if (IsActive()) {
 278     // Initialize candidate window controller and widgets such as
 279     // candidate window, infolist and mode indicator.  Note, mode
 280     // indicator is used by only keyboard layout input methods.
 281     if (active_input_method_ids.size() > 1)
 282       manager_->MaybeInitializeCandidateWindowController();
 283
 284     // you can pass empty |initial_layout|.
 285     ChangeInputMethod(initial_layouts.empty()
 286                           ? std::string()
 287                           : extension_ime_util::GetInputMethodIDByEngineID(
 288                                 initial_layouts[0]),
 289                       false);
 290   }
 291 }
 292
 293 void InputMethodManagerImpl::StateImpl::EnableLockScreenLayouts() {
 294   std::set<std::string> added_ids;
 295
 296   const std::vector<std::string>& hardware_keyboard_ids =
 297       manager_->util_.GetHardwareLoginInputMethodIds();
 298
 299   std::vector<std::string> new_active_input_method_ids;
 300   for (size_t i = 0; i < active_input_method_ids.size(); ++i) {
 301     const std::string& input_method_id = active_input_method_ids[i];
 302     // Skip if it's not a keyboard layout. Drop input methods including
 303     // extension ones.
 304     if (!manager_->IsLoginKeyboard(input_method_id) ||
 305         added_ids.count(input_method_id)) {
 306       continue;
 307     }
 308     new_active_input_method_ids.push_back(input_method_id);
 309     added_ids.insert(input_method_id);
 310   }
 311
 312   // We'll add the hardware keyboard if it's not included in
 313   // |active_input_method_ids| so that the user can always use the hardware
 314   // keyboard on the screen locker.
 315   for (size_t i = 0; i < hardware_keyboard_ids.size(); ++i) {
 316     if (added_ids.count(hardware_keyboard_ids[i]))
 317       continue;
 318     new_active_input_method_ids.push_back(hardware_keyboard_ids[i]);
 319     added_ids.insert(hardware_keyboard_ids[i]);
 320   }
 321
 322   active_input_method_ids.swap(new_active_input_method_ids);
 323
 324   // Re-check current_input_method.
 325   ChangeInputMethod(current_input_method.id(), false);
 326 }
 327
 328 // Adds new input method to given list.
 329 bool InputMethodManagerImpl::StateImpl::EnableInputMethodImpl(
 330     const std::string& input_method_id,
 331     std::vector<std::string>* new_active_input_method_ids) const {
 332   DCHECK(new_active_input_method_ids);
 333   if (!manager_->util_.IsValidInputMethodId(input_method_id)) {
 334     DVLOG(1) << "EnableInputMethod: Invalid ID: " << input_method_id;
 335     return false;
 336   }
 337
 338   if (!Contains(*new_active_input_method_ids, input_method_id))
 339     new_active_input_method_ids->push_back(input_method_id);
 340
 341   return true;
 342 }
 343
 344 bool InputMethodManagerImpl::StateImpl::EnableInputMethod(
 345     const std::string& input_method_id) {
 346   if (!EnableInputMethodImpl(input_method_id, &active_input_method_ids))
 347     return false;
 348
 349   manager_->ReconfigureIMFramework(this);
 350   return true;
 351 }
 352
 353 bool InputMethodManagerImpl::StateImpl::ReplaceEnabledInputMethods(
 354     const std::vector<std::string>& new_active_input_method_ids) {
 355   if (manager_->ui_session_ == STATE_TERMINATING)
 356     return false;
 357
 358   // Filter unknown or obsolete IDs.
 359   std::vector<std::string> new_active_input_method_ids_filtered;
 360
 361   for (size_t i = 0; i < new_active_input_method_ids.size(); ++i)
 362     EnableInputMethodImpl(new_active_input_method_ids[i],
 363                           &new_active_input_method_ids_filtered);
 364
 365   if (new_active_input_method_ids_filtered.empty()) {
 366     DVLOG(1) << "ReplaceEnabledInputMethods: No valid input method ID";
 367     return false;
 368   }
 369
 370   // Copy extension IDs to |new_active_input_method_ids_filtered|. We have to
 371   // keep relative order of the extension input method IDs.
 372   for (size_t i = 0; i < active_input_method_ids.size(); ++i) {
 373     const std::string& input_method_id = active_input_method_ids[i];
 374     if (extension_ime_util::IsExtensionIME(input_method_id))
 375       new_active_input_method_ids_filtered.push_back(input_method_id);
 376   }
 377   active_input_method_ids.swap(new_active_input_method_ids_filtered);
 378   manager_->MigrateInputMethods(&active_input_method_ids);
 379
 380   manager_->ReconfigureIMFramework(this);
 381
 382   // If |current_input_method| is no longer in |active_input_method_ids|,
 383   // ChangeInputMethod() picks the first one in |active_input_method_ids|.
 384   ChangeInputMethod(current_input_method.id(), false);
 385
 386   // Record histogram for active input method count.
 387   UMA_HISTOGRAM_COUNTS("InputMethod.ActiveCount",
 388                        active_input_method_ids.size());
 389
 390   return true;
 391 }
 392
 393 void InputMethodManagerImpl::StateImpl::ChangeInputMethod(
 394     const std::string& input_method_id,
 395     bool show_message) {
 396   if (manager_->ui_session_ == STATE_TERMINATING)
 397     return;
 398
 399   bool notify_menu = false;
 400
 401   // Always lookup input method, even if it is the same as
 402   // |current_input_method| because If it is no longer in
 403   // |active_input_method_ids|, pick the first one in
 404   // |active_input_method_ids|.
 405   const InputMethodDescriptor* descriptor =
 406       manager_->LookupInputMethod(input_method_id, this);
 407   if (!descriptor) {
 408     descriptor = manager_->LookupInputMethod(
 409         manager_->util_.MigrateInputMethod(input_method_id), this);
 410     if (!descriptor)
 411       return;
 412   }
 413
 414   // For 3rd party IME, when the user just logged in, SetEnabledExtensionImes
 415   // happens after activating the 3rd party IME.
 416   // So here to record the 3rd party IME to be activated, and activate it
 417   // when SetEnabledExtensionImes happens later.
 418   if (MethodAwaitsExtensionLoad(descriptor->id()))
 419     pending_input_method_id = descriptor->id();
 420
 421   if (descriptor->id() != current_input_method.id()) {
 422     previous_input_method = current_input_method;
 423     current_input_method = *descriptor;
 424     notify_menu = true;
 425   }
 426
 427   // Always change input method even if it is the same.
 428   // TODO(komatsu): Revisit if this is neccessary.
 429   if (IsActive())
 430     manager_->ChangeInputMethodInternal(*descriptor, profile, show_message,
 431                                         notify_menu);
 432   manager_->RecordInputMethodUsage(current_input_method.id());
 433 }
 434
 435 bool InputMethodManagerImpl::StateImpl::MethodAwaitsExtensionLoad(
 436     const std::string& input_method_id) const {
 437   // For 3rd party IME, when the user just logged in, SetEnabledExtensionImes
 438   // happens after activating the 3rd party IME.
 439   // So here to record the 3rd party IME to be activated, and activate it
 440   // when SetEnabledExtensionImes happens later.
 441   return !InputMethodIsActivated(input_method_id) &&
 442          extension_ime_util::IsExtensionIME(input_method_id);
 443 }
 444
 445 void InputMethodManagerImpl::StateImpl::AddInputMethodExtension(
 446     const std::string& extension_id,
 447     const InputMethodDescriptors& descriptors,
 448     InputMethodEngineInterface* engine) {
 449   if (manager_->ui_session_ == STATE_TERMINATING)
 450     return;
 451
 452   DCHECK(engine);
 453
 454   manager_->engine_map_[profile][extension_id] = engine;
 455
 456   bool contain = false;
 457   for (size_t i = 0; i < descriptors.size(); i++) {
 458     const InputMethodDescriptor& descriptor = descriptors[i];
 459     const std::string& id = descriptor.id();
 460     extra_input_methods[id] = descriptor;
 461     if (Contains(enabled_extension_imes, id)) {
 462       if (!Contains(active_input_method_ids, id)) {
 463         active_input_method_ids.push_back(id);
 464       } else {
 465         DVLOG(1) << "AddInputMethodExtension: already added: " << id << ", "
 466                  << descriptor.name();
 467       }
 468       contain = true;
 469     }
 470   }
 471
 472   if (IsActive()) {
 473     if (extension_id == extension_ime_util::GetExtensionIDFromInputMethodID(
 474                             current_input_method.id())) {
 475       IMEBridge::Get()->SetCurrentEngineHandler(engine);
 476       engine->Enable(extension_ime_util::GetComponentIDByInputMethodID(
 477           current_input_method.id()));
 478     }
 479
 480     // Ensure that the input method daemon is running.
 481     if (contain)
 482       manager_->MaybeInitializeCandidateWindowController();
 483   }
 484 }
 485
 486 void InputMethodManagerImpl::StateImpl::RemoveInputMethodExtension(
 487     const std::string& extension_id) {
 488   // Remove the active input methods with |extension_id|.
 489   std::vector<std::string> new_active_input_method_ids;
 490   for (size_t i = 0; i < active_input_method_ids.size(); ++i) {
 491     if (extension_id != extension_ime_util::GetExtensionIDFromInputMethodID(
 492                             active_input_method_ids[i]))
 493       new_active_input_method_ids.push_back(active_input_method_ids[i]);
 494   }
 495   active_input_method_ids.swap(new_active_input_method_ids);
 496
 497   // Remove the extra input methods with |extension_id|.
 498   std::map<std::string, InputMethodDescriptor> new_extra_input_methods;
 499   for (std::map<std::string, InputMethodDescriptor>::iterator i =
 500            extra_input_methods.begin();
 501        i != extra_input_methods.end();
 502        ++i) {
 503     if (extension_id !=
 504         extension_ime_util::GetExtensionIDFromInputMethodID(i->first))
 505       new_extra_input_methods[i->first] = i->second;
 506   }
 507   extra_input_methods.swap(new_extra_input_methods);
 508
 509   if (IsActive()) {
 510     if (IMEBridge::Get()->GetCurrentEngineHandler() ==
 511         manager_->engine_map_[profile][extension_id]) {
 512       IMEBridge::Get()->SetCurrentEngineHandler(NULL);
 513     }
 514     manager_->engine_map_[profile].erase(extension_id);
 515   }
 516
 517   // If |current_input_method| is no longer in |active_input_method_ids|,
 518   // switch to the first one in |active_input_method_ids|.
 519   ChangeInputMethod(current_input_method.id(), false);
 520 }
 521
 522 void InputMethodManagerImpl::StateImpl::GetInputMethodExtensions(
 523     InputMethodDescriptors* result) {
 524   // Build the extension input method descriptors from the extra input
 525   // methods cache |extra_input_methods|.
 526   std::map<std::string, InputMethodDescriptor>::iterator iter;
 527   for (iter = extra_input_methods.begin(); iter != extra_input_methods.end();
 528        ++iter) {
 529     if (extension_ime_util::IsExtensionIME(iter->first))
 530       result->push_back(iter->second);
 531   }
 532 }
 533
 534 void InputMethodManagerImpl::StateImpl::SetEnabledExtensionImes(
 535     std::vector<std::string>* ids) {
 536   enabled_extension_imes.clear();
 537   enabled_extension_imes.insert(
 538       enabled_extension_imes.end(), ids->begin(), ids->end());
 539   bool active_imes_changed = false;
 540   bool switch_to_pending = false;
 541
 542   for (std::map<std::string, InputMethodDescriptor>::iterator extra_iter =
 543            extra_input_methods.begin();
 544        extra_iter != extra_input_methods.end();
 545        ++extra_iter) {
 546     if (extension_ime_util::IsComponentExtensionIME(extra_iter->first))
 547       continue;  // Do not filter component extension.
 548
 549     if (pending_input_method_id == extra_iter->first)
 550       switch_to_pending = true;
 551
 552     std::vector<std::string>::iterator active_iter =
 553         std::find(active_input_method_ids.begin(),
 554                   active_input_method_ids.end(),
 555                   extra_iter->first);
 556
 557     bool active = active_iter != active_input_method_ids.end();
 558     bool enabled = Contains(enabled_extension_imes, extra_iter->first);
 559
 560     if (active && !enabled)
 561       active_input_method_ids.erase(active_iter);
 562
 563     if (!active && enabled)
 564       active_input_method_ids.push_back(extra_iter->first);
 565
 566     if (active == !enabled)
 567       active_imes_changed = true;
 568   }
 569
 570   if (IsActive() && active_imes_changed) {
 571     manager_->MaybeInitializeCandidateWindowController();
 572
 573     if (switch_to_pending) {
 574       ChangeInputMethod(pending_input_method_id, false);
 575       pending_input_method_id.clear();
 576     } else {
 577       // If |current_input_method| is no longer in |active_input_method_ids_|,
 578       // switch to the first one in |active_input_method_ids_|.
 579       ChangeInputMethod(current_input_method.id(), false);
 580     }
 581   }
 582 }
 583
 584 void InputMethodManagerImpl::StateImpl::SetInputMethodLoginDefaultFromVPD(
 585     const std::string& locale,
 586     const std::string& oem_layout) {
 587   std::string layout;
 588   if (!oem_layout.empty()) {
 589     // If the OEM layout information is provided, use it.
 590     layout = oem_layout;
 591   } else {
 592     // Otherwise, determine the hardware keyboard from the locale.
 593     std::vector<std::string> input_method_ids;
 594     if (manager_->util_.GetInputMethodIdsFromLanguageCode(
 595             locale,
 596             chromeos::input_method::kKeyboardLayoutsOnly,
 597             &input_method_ids)) {
 598       // The output list |input_method_ids| is sorted by popularity, hence
 599       // input_method_ids[0] now contains the most popular keyboard layout
 600       // for the given locale.
 601       DCHECK_GE(input_method_ids.size(), 1U);
 602       layout = input_method_ids[0];
 603     }
 604   }
 605
 606   if (layout.empty())
 607     return;
 608
 609   std::vector<std::string> layouts = base::SplitString(
 610       layout, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
 611   manager_->MigrateInputMethods(&layouts);
 612
 613   PrefService* prefs = g_browser_process->local_state();
 614   prefs->SetString(prefs::kHardwareKeyboardLayout,
 615                    base::JoinString(layouts, ","));
 616
 617   // This asks the file thread to save the prefs (i.e. doesn't block).
 618   // The latest values of Local State reside in memory so we can safely
 619   // get the value of kHardwareKeyboardLayout even if the data is not
 620   // yet saved to disk.
 621   prefs->CommitPendingWrite();
 622
 623   manager_->util_.UpdateHardwareLayoutCache();
 624
 625   EnableLoginLayouts(locale, layouts);
 626   manager_->LoadNecessaryComponentExtensions(this);
 627 }
 628
 629 void InputMethodManagerImpl::StateImpl::SetInputMethodLoginDefault() {
 630   // Set up keyboards. For example, when |locale| is "en-US", enable US qwerty
 631   // and US dvorak keyboard layouts.
 632   if (g_browser_process && g_browser_process->local_state()) {
 633     const std::string locale = g_browser_process->GetApplicationLocale();
 634     // If the preferred keyboard for the login screen has been saved, use it.
 635     PrefService* prefs = g_browser_process->local_state();
 636     std::string initial_input_method_id =
 637         prefs->GetString(chromeos::language_prefs::kPreferredKeyboardLayout);
 638     std::vector<std::string> input_methods_to_be_enabled;
 639     if (initial_input_method_id.empty()) {
 640       // If kPreferredKeyboardLayout is not specified, use the hardware layout.
 641       input_methods_to_be_enabled =
 642           manager_->util_.GetHardwareLoginInputMethodIds();
 643     } else {
 644       input_methods_to_be_enabled.push_back(initial_input_method_id);
 645     }
 646     EnableLoginLayouts(locale, input_methods_to_be_enabled);
 647     manager_->LoadNecessaryComponentExtensions(this);
 648   }
 649 }
 650
 651 bool InputMethodManagerImpl::StateImpl::CanCycleInputMethod() {
 652   // Sanity checks.
 653   if (active_input_method_ids.empty()) {
 654     DVLOG(1) << "active input method is empty";
 655     return false;
 656   }
 657
 658   if (current_input_method.id().empty()) {
 659     DVLOG(1) << "current_input_method is unknown";
 660     return false;
 661   }
 662
 663   // Do not consume key event if there is only one input method is enabled.
 664   // Ctrl+Space or Alt+Shift may be used by other application.
 665   return active_input_method_ids.size() > 1;
 666 }
 667
 668 void InputMethodManagerImpl::StateImpl::SwitchToNextInputMethod() {
 669   DCHECK(CanCycleInputMethod());
 670   if (!CanCycleInputMethod())
 671     return;
 672
 673   // Find the next input method and switch to it.
 674   SwitchToNextInputMethodInternal(active_input_method_ids,
 675                                   current_input_method.id());
 676   InputMethodSwitchRecorder::Get()->RecordSwitch(false /* by_tray_menu*/);
 677 }
 678
 679 void InputMethodManagerImpl::StateImpl::SwitchToPreviousInputMethod() {
 680   DCHECK(CanCycleInputMethod());
 681   if (!CanCycleInputMethod())
 682     return;
 683
 684   if (previous_input_method.id().empty() ||
 685       previous_input_method.id() == current_input_method.id()) {
 686     SwitchToNextInputMethod();
 687     return;
 688   }
 689
 690   std::vector<std::string>::const_iterator iter =
 691       std::find(active_input_method_ids.begin(),
 692                 active_input_method_ids.end(),
 693                 previous_input_method.id());
 694   if (iter == active_input_method_ids.end()) {
 695     // previous_input_method is not supported.
 696     SwitchToNextInputMethod();
 697     return;
 698   }
 699   ChangeInputMethod(*iter, true);
 700   InputMethodSwitchRecorder::Get()->RecordSwitch(false /* by_tray_menu*/);
 701 }
 702
 703 bool InputMethodManagerImpl::StateImpl::CanSwitchInputMethod(
 704     const ui::Accelerator& accelerator) {
 705   // If none of the input methods associated with |accelerator| are active, we
 706   // should ignore the accelerator. For example, we should just ignore
 707   // VKEY_HANGUL when mozc-hangul is not active.
 708   std::vector<std::string> candidate_ids;
 709   GetCandidateInputMethodsForAccelerator(accelerator, &candidate_ids);
 710   return !candidate_ids.empty();
 711 }
 712
 713 void InputMethodManagerImpl::StateImpl::SwitchInputMethod(
 714     const ui::Accelerator& accelerator) {
 715   std::vector<std::string> candidate_ids;
 716   GetCandidateInputMethodsForAccelerator(accelerator, &candidate_ids);
 717   DCHECK(!candidate_ids.empty());
 718   if (!candidate_ids.empty()) {
 719     SwitchToNextInputMethodInternal(candidate_ids, current_input_method.id());
 720     InputMethodSwitchRecorder::Get()->RecordSwitch(false /* by_tray_menu*/);
 721   }
 722 }
 723
 724 void InputMethodManagerImpl::StateImpl::SwitchToNextInputMethodInternal(
 725     const std::vector<std::string>& input_method_ids,
 726     const std::string& current_input_methodid) {
 727   std::vector<std::string>::const_iterator iter = std::find(
 728       input_method_ids.begin(), input_method_ids.end(), current_input_methodid);
 729   if (iter != input_method_ids.end())
 730     ++iter;
 731   if (iter == input_method_ids.end())
 732     iter = input_method_ids.begin();
 733   ChangeInputMethod(*iter, true);
 734 }
 735
 736 void InputMethodManagerImpl::StateImpl::GetCandidateInputMethodsForAccelerator(
 737     const ui::Accelerator& accelerator,
 738     std::vector<std::string>* out_candidate_ids) {
 739   out_candidate_ids->clear();
 740
 741   // Sanity check.
 742   if (active_input_method_ids.empty()) {
 743     DVLOG(1) << "active input method is empty";
 744     return;
 745   }
 746
 747   std::vector<std::string> input_method_ids_to_switch;
 748   switch (accelerator.key_code()) {
 749     case ui::VKEY_CONVERT:  // Henkan key on JP106 keyboard
 750       input_method_ids_to_switch.push_back(
 751           extension_ime_util::GetInputMethodIDByEngineID("nacl_mozc_jp"));
 752       break;
 753     case ui::VKEY_NONCONVERT:  // Muhenkan key on JP106 keyboard
 754       input_method_ids_to_switch.push_back(
 755           extension_ime_util::GetInputMethodIDByEngineID("xkb:jp::jpn"));
 756       break;
 757     case ui::VKEY_DBE_SBCSCHAR:  // ZenkakuHankaku key on JP106 keyboard
 758     case ui::VKEY_DBE_DBCSCHAR:
 759       input_method_ids_to_switch.push_back(
 760           extension_ime_util::GetInputMethodIDByEngineID("nacl_mozc_jp"));
 761       input_method_ids_to_switch.push_back(
 762           extension_ime_util::GetInputMethodIDByEngineID("xkb:jp::jpn"));
 763       break;
 764     default:
 765       NOTREACHED();
 766       break;
 767   }
 768   if (input_method_ids_to_switch.empty()) {
 769     DVLOG(1) << "Unexpected VKEY: " << accelerator.key_code();
 770     return;
 771   }
 772
 773   // Obtain the intersection of input_method_ids_to_switch and
 774   // active_input_method_ids.
 775   for (size_t i = 0; i < input_method_ids_to_switch.size(); ++i) {
 776     const std::string& id = input_method_ids_to_switch[i];
 777     if (Contains(active_input_method_ids, id))
 778       out_candidate_ids->push_back(id);
 779   }
 780 }
 781
 782 InputMethodDescriptor InputMethodManagerImpl::StateImpl::GetCurrentInputMethod()
 783     const {
 784   if (current_input_method.id().empty())
 785     return InputMethodUtil::GetFallbackInputMethodDescriptor();
 786
 787   return current_input_method;
 788 }
 789
 790 bool InputMethodManagerImpl::StateImpl::InputMethodIsActivated(
 791     const std::string& input_method_id) const {
 792   return Contains(active_input_method_ids, input_method_id);
 793 }
 794
 795 // ------------------------ InputMethodManagerImpl
 796 bool InputMethodManagerImpl::IsLoginKeyboard(
 797     const std::string& layout) const {
 798   return util_.IsLoginKeyboard(layout);
 799 }
 800
 801 bool InputMethodManagerImpl::MigrateInputMethods(
 802     std::vector<std::string>* input_method_ids) {
 803   return util_.MigrateInputMethods(input_method_ids);
 804 }
 805
 806 // Starts or stops the system input method framework as needed.
 807 void InputMethodManagerImpl::ReconfigureIMFramework(
 808     InputMethodManagerImpl::StateImpl* state) {
 809   LoadNecessaryComponentExtensions(state);
 810
 811   // Initialize candidate window controller and widgets such as
 812   // candidate window, infolist and mode indicator.  Note, mode
 813   // indicator is used by only keyboard layout input methods.
 814   if (state_.get() == state)
 815     MaybeInitializeCandidateWindowController();
 816 }
 817
 818 void InputMethodManagerImpl::SetState(
 819     scoped_refptr<InputMethodManager::State> state) {
 820   DCHECK(state.get());
 821   InputMethodManagerImpl::StateImpl* new_impl_state =
 822       static_cast<InputMethodManagerImpl::StateImpl*>(state.get());
 823
 824   state_ = new_impl_state;
 825
 826   if (state_.get() && state_->active_input_method_ids.size()) {
 827     // Initialize candidate window controller and widgets such as
 828     // candidate window, infolist and mode indicator.  Note, mode
 829     // indicator is used by only keyboard layout input methods.
 830     MaybeInitializeCandidateWindowController();
 831
 832     // Always call ChangeInputMethodInternal even when the input method id
 833     // remain unchanged, because onActivate event needs to be sent to IME
 834     // extension to update the current screen type correctly.
 835     ChangeInputMethodInternal(state_->current_input_method, state_->profile,
 836                               false /* show_message */, true /* notify_menu */);
 837   }
 838 }
 839
 840 scoped_refptr<InputMethodManager::State>
 841 InputMethodManagerImpl::GetActiveIMEState() {
 842   return scoped_refptr<InputMethodManager::State>(state_.get());
 843 }
 844
 845 InputMethodManagerImpl::InputMethodManagerImpl(
 846     scoped_ptr<InputMethodDelegate> delegate,
 847     bool enable_extension_loading)
 848     : delegate_(delegate.Pass()),
 849       ui_session_(STATE_LOGIN_SCREEN),
 850       state_(NULL),
 851       util_(delegate_.get()),
 852       component_extension_ime_manager_(new ComponentExtensionIMEManager()),
 853       enable_extension_loading_(enable_extension_loading) {
 854   if (base::SysInfo::IsRunningOnChromeOS())
 855     keyboard_.reset(ImeKeyboard::Create());
 856   else
 857     keyboard_.reset(new FakeImeKeyboard());
 858
 859   // Initializes the system IME list.
 860   scoped_ptr<ComponentExtensionIMEManagerDelegate> comp_delegate(
 861       new ComponentExtensionIMEManagerImpl());
 862   component_extension_ime_manager_->Initialize(comp_delegate.Pass());
 863   const InputMethodDescriptors& descriptors =
 864       component_extension_ime_manager_->GetAllIMEAsInputMethodDescriptor();
 865   util_.ResetInputMethods(descriptors);
 866 }
 867
 868 InputMethodManagerImpl::~InputMethodManagerImpl() {
 869   if (candidate_window_controller_.get())
 870     candidate_window_controller_->RemoveObserver(this);
 871 }
 872
 873 void InputMethodManagerImpl::RecordInputMethodUsage(
 874     std::string input_method_id) {
 875   UMA_HISTOGRAM_ENUMERATION("InputMethod.Category",
 876                             GetInputMethodCategory(input_method_id),
 877                             INPUT_METHOD_CATEGORY_MAX);
 878   UMA_HISTOGRAM_SPARSE_SLOWLY(
 879       "InputMethod.ID2", static_cast<int32_t>(base::Hash(input_method_id)));
 880 }
 881
 882 void InputMethodManagerImpl::AddObserver(
 883     InputMethodManager::Observer* observer) {
 884   observers_.AddObserver(observer);
 885 }
 886
 887 void InputMethodManagerImpl::AddCandidateWindowObserver(
 888     InputMethodManager::CandidateWindowObserver* observer) {
 889   candidate_window_observers_.AddObserver(observer);
 890 }
 891
 892 void InputMethodManagerImpl::RemoveObserver(
 893     InputMethodManager::Observer* observer) {
 894   observers_.RemoveObserver(observer);
 895 }
 896
 897 void InputMethodManagerImpl::RemoveCandidateWindowObserver(
 898     InputMethodManager::CandidateWindowObserver* observer) {
 899   candidate_window_observers_.RemoveObserver(observer);
 900 }
 901
 902 InputMethodManager::UISessionState InputMethodManagerImpl::GetUISessionState() {
 903   return ui_session_;
 904 }
 905
 906 void InputMethodManagerImpl::SetUISessionState(UISessionState new_ui_session) {
 907   ui_session_ = new_ui_session;
 908   switch (ui_session_) {
 909     case STATE_LOGIN_SCREEN:
 910       break;
 911     case STATE_BROWSER_SCREEN:
 912       break;
 913     case STATE_LOCK_SCREEN:
 914       break;
 915     case STATE_TERMINATING: {
 916       if (candidate_window_controller_.get())
 917         candidate_window_controller_.reset();
 918       break;
 919     }
 920   }
 921 }
 922
 923 scoped_ptr<InputMethodDescriptors>
 924 InputMethodManagerImpl::GetSupportedInputMethods() const {
 925   return scoped_ptr<InputMethodDescriptors>(new InputMethodDescriptors).Pass();
 926 }
 927
 928 const InputMethodDescriptor* InputMethodManagerImpl::LookupInputMethod(
 929     const std::string& input_method_id,
 930     InputMethodManagerImpl::StateImpl* state) {
 931   DCHECK(state);
 932
 933   std::string input_method_id_to_switch = input_method_id;
 934
 935   // Sanity check
 936   if (!state->InputMethodIsActivated(input_method_id)) {
 937     scoped_ptr<InputMethodDescriptors> input_methods(
 938         state->GetActiveInputMethods());
 939     DCHECK(!input_methods->empty());
 940     input_method_id_to_switch = input_methods->at(0).id();
 941     if (!input_method_id.empty()) {
 942       DVLOG(1) << "Can't change the current input method to "
 943                << input_method_id << " since the engine is not enabled. "
 944                << "Switch to " << input_method_id_to_switch << " instead.";
 945     }
 946   }
 947
 948   const InputMethodDescriptor* descriptor = NULL;
 949   if (extension_ime_util::IsExtensionIME(input_method_id_to_switch)) {
 950     DCHECK(state->extra_input_methods.find(input_method_id_to_switch) !=
 951            state->extra_input_methods.end());
 952     descriptor = &(state->extra_input_methods[input_method_id_to_switch]);
 953   } else {
 954     descriptor =
 955         util_.GetInputMethodDescriptorFromId(input_method_id_to_switch);
 956     if (!descriptor)
 957       LOG(ERROR) << "Unknown input method id: " << input_method_id_to_switch;
 958   }
 959   DCHECK(descriptor);
 960   return descriptor;
 961 }
 962
 963 void InputMethodManagerImpl::ChangeInputMethodInternal(
 964     const InputMethodDescriptor& descriptor,
 965     Profile* profile,
 966     bool show_message,
 967     bool notify_menu) {
 968   // No need to switch input method when terminating.
 969   if (ui_session_ == STATE_TERMINATING)
 970     return;
 971
 972   if (candidate_window_controller_.get())
 973     candidate_window_controller_->Hide();
 974
 975   if (notify_menu) {
 976     // Clear property list.  Property list would be updated by
 977     // extension IMEs via InputMethodEngine::(Set|Update)MenuItems.
 978     // If the current input method is a keyboard layout, empty
 979     // properties are sufficient.
 980     const ui::ime::InputMethodMenuItemList empty_menu_item_list;
 981     ui::ime::InputMethodMenuManager* input_method_menu_manager =
 982         ui::ime::InputMethodMenuManager::GetInstance();
 983     input_method_menu_manager->SetCurrentInputMethodMenuItemList(
 984             empty_menu_item_list);
 985   }
 986
 987   // Disable the current engine handler.
 988   IMEEngineHandlerInterface* engine =
 989       IMEBridge::Get()->GetCurrentEngineHandler();
 990   if (engine)
 991     engine->Disable();
 992
 993   // Configure the next engine handler.
 994   // This must be after |current_input_method| has been set to new input
 995   // method, because engine's Enable() method needs to access it.
 996   const std::string& extension_id =
 997       extension_ime_util::GetExtensionIDFromInputMethodID(descriptor.id());
 998   const std::string& component_id =
 999       extension_ime_util::GetComponentIDByInputMethodID(descriptor.id());
1000   engine = engine_map_[profile][extension_id];
1001
1002   IMEBridge::Get()->SetCurrentEngineHandler(engine);
1003
1004   if (engine) {
1005     engine->Enable(component_id);
1006   } else {
1007     // If no engine to enable, cancel the virtual keyboard url override so that
1008     // it can use the fallback system virtual keyboard UI.
1009     keyboard::SetOverrideContentUrl(GURL());
1010     keyboard::KeyboardController* keyboard_controller =
1011         keyboard::KeyboardController::GetInstance();
1012     if (keyboard_controller)
1013       keyboard_controller->Reload();
1014   }
1015
1016   // Change the keyboard layout to a preferred layout for the input method.
1017   if (!keyboard_->SetCurrentKeyboardLayoutByName(
1018           descriptor.GetPreferredKeyboardLayout())) {
1019     LOG(ERROR) << "Failed to change keyboard layout to "
1020                << descriptor.GetPreferredKeyboardLayout();
1021   }
1022
1023   // Update input method indicators (e.g. "US", "DV") in Chrome windows.
1024   FOR_EACH_OBSERVER(InputMethodManager::Observer, observers_,
1025                     InputMethodChanged(this, profile, show_message));
1026 }
1027
1028 void InputMethodManagerImpl::LoadNecessaryComponentExtensions(
1029     InputMethodManagerImpl::StateImpl* state) {
1030   // Load component extensions but also update |active_input_method_ids| as
1031   // some component extension IMEs may have been removed from the Chrome OS
1032   // image. If specified component extension IME no longer exists, falling back
1033   // to an existing IME.
1034   DCHECK(state);
1035   std::vector<std::string> unfiltered_input_method_ids;
1036   unfiltered_input_method_ids.swap(state->active_input_method_ids);
1037   for (size_t i = 0; i < unfiltered_input_method_ids.size(); ++i) {
1038     if (!extension_ime_util::IsComponentExtensionIME(
1039         unfiltered_input_method_ids[i])) {
1040       // Legacy IMEs or xkb layouts are alwayes active.
1041       state->active_input_method_ids.push_back(unfiltered_input_method_ids[i]);
1042     } else if (component_extension_ime_manager_->IsWhitelisted(
1043         unfiltered_input_method_ids[i])) {
1044       if (enable_extension_loading_) {
1045         component_extension_ime_manager_->LoadComponentExtensionIME(
1046             state->profile, unfiltered_input_method_ids[i]);
1047       }
1048
1049       state->active_input_method_ids.push_back(unfiltered_input_method_ids[i]);
1050     }
1051   }
1052 }
1053
1054 void InputMethodManagerImpl::ActivateInputMethodMenuItem(
1055     const std::string& key) {
1056   DCHECK(!key.empty());
1057
1058   if (ui::ime::InputMethodMenuManager::GetInstance()->
1059       HasInputMethodMenuItemForKey(key)) {
1060     IMEEngineHandlerInterface* engine =
1061         IMEBridge::Get()->GetCurrentEngineHandler();
1062     if (engine)
1063       engine->PropertyActivate(key);
1064     return;
1065   }
1066
1067   DVLOG(1) << "ActivateInputMethodMenuItem: unknown key: " << key;
1068 }
1069
1070 bool InputMethodManagerImpl::IsISOLevel5ShiftUsedByCurrentInputMethod() const {
1071   return keyboard_->IsISOLevel5ShiftAvailable();
1072 }
1073
1074 bool InputMethodManagerImpl::IsAltGrUsedByCurrentInputMethod() const {
1075   return keyboard_->IsAltGrAvailable();
1076 }
1077
1078 ImeKeyboard* InputMethodManagerImpl::GetImeKeyboard() {
1079   return keyboard_.get();
1080 }
1081
1082 InputMethodUtil* InputMethodManagerImpl::GetInputMethodUtil() {
1083   return &util_;
1084 }
1085
1086 ComponentExtensionIMEManager*
1087     InputMethodManagerImpl::GetComponentExtensionIMEManager() {
1088   return component_extension_ime_manager_.get();
1089 }
1090
1091 scoped_refptr<InputMethodManager::State> InputMethodManagerImpl::CreateNewState(
1092     Profile* profile) {
1093   StateImpl* new_state = new StateImpl(this, profile);
1094
1095   // Active IM should be set to owner/user's default.
1096   PrefService* prefs = g_browser_process->local_state();
1097   PrefService* user_prefs = profile ? profile->GetPrefs() : nullptr;
1098   std::string initial_input_method_id;
1099   if (user_prefs) {
1100     initial_input_method_id =
1101         user_prefs->GetString(prefs::kLanguageCurrentInputMethod);
1102   }
1103   if (initial_input_method_id.empty()) {
1104     initial_input_method_id =
1105         prefs->GetString(chromeos::language_prefs::kPreferredKeyboardLayout);
1106   }
1107
1108   const InputMethodDescriptor* descriptor =
1109       GetInputMethodUtil()->GetInputMethodDescriptorFromId(
1110           initial_input_method_id.empty()
1111               ? GetInputMethodUtil()->GetFallbackInputMethodDescriptor().id()
1112               : initial_input_method_id);
1113   if (descriptor) {
1114     new_state->active_input_method_ids.push_back(descriptor->id());
1115     new_state->current_input_method = *descriptor;
1116   }
1117   return scoped_refptr<InputMethodManager::State>(new_state);
1118 }
1119
1120 void InputMethodManagerImpl::SetCandidateWindowControllerForTesting(
1121     CandidateWindowController* candidate_window_controller) {
1122   candidate_window_controller_.reset(candidate_window_controller);
1123   candidate_window_controller_->AddObserver(this);
1124 }
1125
1126 void InputMethodManagerImpl::SetImeKeyboardForTesting(ImeKeyboard* keyboard) {
1127   keyboard_.reset(keyboard);
1128 }
1129
1130 void InputMethodManagerImpl::InitializeComponentExtensionForTesting(
1131     scoped_ptr<ComponentExtensionIMEManagerDelegate> delegate) {
1132   component_extension_ime_manager_->Initialize(delegate.Pass());
1133   util_.ResetInputMethods(
1134       component_extension_ime_manager_->GetAllIMEAsInputMethodDescriptor());
1135 }
1136
1137 void InputMethodManagerImpl::CandidateClicked(int index) {
1138   IMEEngineHandlerInterface* engine =
1139       IMEBridge::Get()->GetCurrentEngineHandler();
1140   if (engine)
1141     engine->CandidateClicked(index);
1142 }
1143
1144 void InputMethodManagerImpl::CandidateWindowOpened() {
1145   FOR_EACH_OBSERVER(InputMethodManager::CandidateWindowObserver,
1146                     candidate_window_observers_,
1147                     CandidateWindowOpened(this));
1148 }
1149
1150 void InputMethodManagerImpl::CandidateWindowClosed() {
1151   FOR_EACH_OBSERVER(InputMethodManager::CandidateWindowObserver,
1152                     candidate_window_observers_,
1153                     CandidateWindowClosed(this));
1154 }
1155
1156 void InputMethodManagerImpl::MaybeInitializeCandidateWindowController() {
1157   if (candidate_window_controller_.get())
1158     return;
1159
1160   candidate_window_controller_.reset(
1161       CandidateWindowController::CreateCandidateWindowController());
1162   candidate_window_controller_->AddObserver(this);
1163 }
1164
1165 }  // namespace input_method
1166 }  // namespace chromeos