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// Copyright (c) 2012 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/input_method/input_method_persistence.h"
#include "base/logging.h"
#include "base/prefs/pref_service.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chromeos/input_method/input_method_util.h"
#include "chrome/browser/chromeos/language_preferences.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/common/pref_names.h"
namespace chromeos {
namespace input_method {
namespace {
void PersistSystemInputMethod(const std::string& input_method) {
if (!g_browser_process || !g_browser_process->local_state())
return;
g_browser_process->local_state()->SetString(
language_prefs::kPreferredKeyboardLayout, input_method);
}
void PersistUserInputMethod(const std::string& input_method) {
PrefService* user_prefs = NULL;
Profile* profile = ProfileManager::GetDefaultProfile();
if (profile)
user_prefs = profile->GetPrefs();
if (!user_prefs)
return;
const std::string current_input_method_on_pref =
user_prefs->GetString(prefs::kLanguageCurrentInputMethod);
if (current_input_method_on_pref == input_method)
return;
user_prefs->SetString(prefs::kLanguagePreviousInputMethod,
current_input_method_on_pref);
user_prefs->SetString(prefs::kLanguageCurrentInputMethod,
input_method);
}
} // namespace
InputMethodPersistence::InputMethodPersistence(
InputMethodManager* input_method_manager)
: input_method_manager_(input_method_manager),
state_(InputMethodManager::STATE_LOGIN_SCREEN) {
input_method_manager_->AddObserver(this);
}
InputMethodPersistence::~InputMethodPersistence() {
input_method_manager_->RemoveObserver(this);
}
void InputMethodPersistence::InputMethodChanged(
InputMethodManager* manager, bool show_message) {
DCHECK_EQ(input_method_manager_, manager);
const std::string current_input_method =
manager->GetCurrentInputMethod().id();
// Save the new input method id depending on the current browser state.
switch (state_) {
case InputMethodManager::STATE_LOGIN_SCREEN:
if (!InputMethodUtil::IsKeyboardLayout(current_input_method)) {
DVLOG(1) << "Only keyboard layouts are supported: "
<< current_input_method;
return;
}
PersistSystemInputMethod(current_input_method);
return;
case InputMethodManager::STATE_BROWSER_SCREEN:
PersistUserInputMethod(current_input_method);
return;
case InputMethodManager::STATE_LOCK_SCREEN:
// We use a special set of input methods on the screen. Do not update.
return;
case InputMethodManager::STATE_TERMINATING:
return;
}
NOTREACHED();
}
void InputMethodPersistence::InputMethodPropertyChanged(
InputMethodManager* manager) {}
void InputMethodPersistence::OnSessionStateChange(
InputMethodManager::State new_state) {
state_ = new_state;
}
} // namespace input_method
} // namespace chromeos
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