IME refactoring: ChromeOS introduce input methods State.

chrome/browser/chromeos/login/lock/screen_locker.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/ash_switches.h"
@@ skipping 187 matching lines @@
       LOG(ERROR) << "Start time is not set at authentication success";
   } else {
     base::TimeDelta delta = base::Time::Now() - authentication_start_time_;
     VLOG(1) << "Authentication success: " << delta.InSecondsF() << " second(s)";
     UMA_HISTOGRAM_TIMES("ScreenLocker.AuthenticationSuccessTime", delta);
   }
 
   const user_manager::User* user =
       UserManager::Get()->FindUser(user_context.GetUserID());
   if (user) {
-    if (!user->is_active())
+    if (user->is_active()) {
+      DCHECK(saved_ime_state_);
+      input_method::InputMethodManager::Get()->SetState(saved_ime_state_);
+    } else {
       UserManager::Get()->SwitchActiveUser(user_context.GetUserID());
+    }
   } else {
     NOTREACHED() << "Logged in user not found.";
   }
+  saved_ime_state_ = NULL;
 
   authentication_capture_.reset(new AuthenticationParametersCapture());
   authentication_capture_->user_context = user_context;
 
   // Add guard for case when something get broken in call chain to unlock
   // for sure.
   base::MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&ScreenLocker::UnlockOnLoginSuccess,
           weak_factory_.GetWeakPtr()),
@@ skipping 244 matching lines @@
   locked_ = true;
   base::TimeDelta delta = base::Time::Now() - start_time_;
   VLOG(1) << "ScreenLocker " << this << " is ready after "
           << delta.InSecondsF() << " second(s)";
   UMA_HISTOGRAM_TIMES("ScreenLocker.ScreenLockTime", delta);
 
   VLOG(1) << "Moving desktop background to locked container";
   ash::Shell::GetInstance()->
       desktop_background_controller()->MoveDesktopToLockedContainer();
 
+  input_method::InputMethodManager* imm =
+      input_method::InputMethodManager::Get();
+  saved_ime_state_ = imm->GetActiveIMEState();
+  imm->SetState(imm->CloneState(saved_ime_state_.get()));
+  imm->GetActiveIMEState()->EnableLockScreenLayouts();
+
   bool state = true;
   VLOG(1) << "Emitting SCREEN_LOCK_STATE_CHANGED with state=" << state;
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_SCREEN_LOCK_STATE_CHANGED,
       content::Source<ScreenLocker>(this),
       content::Details<bool>(&state));
   VLOG(1) << "Calling session manager's HandleLockScreenShown D-Bus method";
   DBusThreadManager::Get()->GetSessionManagerClient()->NotifyLockScreenShown();
 }
 
 content::WebUI* ScreenLocker::GetAssociatedWebUI() {
   return delegate_->GetAssociatedWebUI();
 }
 
 bool ScreenLocker::IsUserLoggedIn(const std::string& username) {
   for (user_manager::UserList::const_iterator it = users_.begin();
        it != users_.end();
        ++it) {
     if ((*it)->email() == username)
       return true;
   }
   return false;
 }
 
 }  // namespace chromeos