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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/input_method/input_method_persistence.h"
#include "base/logging.h"
#include "base/notreached.h"
#include "base/system/sys_info.h"
#include "chrome/browser/ash/login/lock/screen_locker.h"
#include "chrome/browser/ash/login/login_pref_names.h"
#include "chrome/browser/ash/profiles/profile_helper.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/ash/login/login_screen_client_impl.h"
#include "chrome/common/pref_names.h"
#include "chromeos/ash/components/language_preferences/language_preferences.h"
#include "components/account_id/account_id.h"
#include "components/prefs/pref_service.h"
#include "components/prefs/scoped_user_pref_update.h"
#include "components/user_manager/known_user.h"
#include "ui/base/ime/ash/input_method_util.h"
namespace ash::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);
}
// Returns the user email, whether or not they have consented to browser sync.
AccountId GetUserAccount(Profile* profile) {
const user_manager::User* user =
ProfileHelper::Get()->GetUserByProfile(profile);
if (!user) {
return EmptyAccountId();
}
return user->GetAccountId();
}
static void SetUserLastInputMethodPreference(
const AccountId& account_id,
const std::string& input_method_id) {
if (!account_id.is_valid()) {
return;
}
user_manager::KnownUser known_user(g_browser_process->local_state());
known_user.SetUserLastLoginInputMethodId(account_id, input_method_id);
}
void PersistUserInputMethod(const std::string& input_method_id,
InputMethodManager* const manager,
Profile* profile) {
PrefService* user_prefs = nullptr;
// Persist the method on a per user basis. Note that the keyboard settings are
// stored per user desktop and a visiting window will use the same input
// method as the desktop it is on (and not of the owner of the window).
if (profile) {
user_prefs = profile->GetPrefs();
}
if (!user_prefs) {
return;
}
InputMethodPersistence::SetUserLastLoginInputMethodId(input_method_id,
manager, profile);
const std::string current_input_method_id_on_pref =
user_prefs->GetString(::prefs::kLanguageCurrentInputMethod);
if (current_input_method_id_on_pref == input_method_id) {
return;
}
user_prefs->SetString(::prefs::kLanguagePreviousInputMethod,
current_input_method_id_on_pref);
user_prefs->SetString(::prefs::kLanguageCurrentInputMethod, input_method_id);
}
} // namespace
InputMethodPersistence::InputMethodPersistence(
InputMethodManager* input_method_manager)
: input_method_manager_(input_method_manager) {
input_method_manager_->AddObserver(this);
}
InputMethodPersistence::~InputMethodPersistence() {
input_method_manager_->RemoveObserver(this);
}
void InputMethodPersistence::InputMethodChanged(InputMethodManager* manager,
Profile* profile,
bool show_message) {
if (!g_browser_process || g_browser_process->IsShuttingDown()) {
return;
}
DCHECK_EQ(input_method_manager_, manager);
const std::string current_input_method =
manager->GetActiveIMEState()->GetCurrentInputMethod().id();
// Save the new input method id depending on the current browser state.
switch (manager->GetActiveIMEState()->GetUIStyle()) {
case InputMethodManager::UIStyle::kLogin:
if (!manager->IsLoginKeyboard(current_input_method)) {
DVLOG(1) << "Only keyboard layouts are supported: "
<< current_input_method;
return;
}
PersistSystemInputMethod(current_input_method);
return;
case InputMethodManager::UIStyle::kNormal:
PersistUserInputMethod(current_input_method, manager, profile);
return;
case InputMethodManager::UIStyle::kLock:
// We are either in unit test, or screen should be locked.
DCHECK(!LoginScreenClientImpl::HasInstance() ||
ScreenLocker::default_screen_locker());
return;
case InputMethodManager::UIStyle::kSecondaryLogin:
// We use a special set of input methods on the screen. Do not update.
return;
}
NOTREACHED();
}
// static
void InputMethodPersistence::SetUserLastLoginInputMethodId(
const std::string& input_method_id,
const InputMethodManager* const manager,
Profile* profile) {
if (!profile) {
return;
}
// Skip if it's not a keyboard layout. Drop input methods including
// extension ones.
if (!manager->IsLoginKeyboard(input_method_id)) {
return;
}
// TODO(https://crbug.com/1121565): Create more general fix for all the data
// that is required on the lock screen.
profile->GetPrefs()->SetString(prefs::kLastLoginInputMethod, input_method_id);
SetUserLastInputMethodPreference(GetUserAccount(profile), input_method_id);
}
void SetUserLastInputMethodPreferenceForTesting(
const AccountId& account_id,
const std::string& input_method) {
SetUserLastInputMethodPreference(account_id, input_method);
}
} // namespace ash::input_method
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