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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/locale_change_guard.h"
#include "ash/ash_switches.h"
#include "ash/shell.h"
#include "ash/system/tray/system_tray.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/utf_string_conversions.h"
#include "chrome/app/chrome_command_ids.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chromeos/login/user_manager.h"
#include "chrome/browser/notifications/notification_delegate.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_commands.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/common/chrome_notification_types.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/user_metrics.h"
#include "content/public/browser/web_contents.h"
#include "grit/generated_resources.h"
#include "grit/theme_resources.h"
#include "ui/base/l10n/l10n_util.h"
using content::UserMetricsAction;
using content::WebContents;
namespace chromeos {
class LocaleChangeGuard::Delegate : public NotificationDelegate {
public:
explicit Delegate(chromeos::LocaleChangeGuard* master) : master_(master) {}
virtual void Close(bool by_user) OVERRIDE;
virtual void Display() OVERRIDE {}
virtual void Error() OVERRIDE {}
virtual void Click() OVERRIDE {}
virtual std::string id() const OVERRIDE;
virtual content::RenderViewHost* GetRenderViewHost() const OVERRIDE {
return NULL;
}
protected:
virtual ~Delegate() {}
private:
chromeos::LocaleChangeGuard* master_;
DISALLOW_COPY_AND_ASSIGN(Delegate);
};
LocaleChangeGuard::LocaleChangeGuard(Profile* profile)
: profile_(profile),
note_(NULL),
reverted_(false) {
DCHECK(profile_);
registrar_.Add(this, chrome::NOTIFICATION_OWNERSHIP_CHECKED,
content::NotificationService::AllSources());
}
LocaleChangeGuard::~LocaleChangeGuard() {}
void LocaleChangeGuard::OnLogin() {
registrar_.Add(this, content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
content::NotificationService::AllBrowserContextsAndSources());
}
void LocaleChangeGuard::RevertLocaleChange() {
if (profile_ == NULL ||
from_locale_.empty() ||
to_locale_.empty()) {
NOTREACHED();
return;
}
if (reverted_)
return;
reverted_ = true;
content::RecordAction(UserMetricsAction("LanguageChange_Revert"));
profile_->ChangeAppLocale(
from_locale_, Profile::APP_LOCALE_CHANGED_VIA_REVERT);
Browser* browser = browser::FindTabbedBrowser(profile_, false);
if (browser)
chrome::ExecuteCommand(browser, IDC_EXIT);
}
void LocaleChangeGuard::RevertLocaleChangeCallback(const ListValue* list) {
RevertLocaleChange();
}
void LocaleChangeGuard::Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
if (profile_ == NULL) {
NOTREACHED();
return;
}
switch (type) {
case content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME: {
if (profile_ ==
content::Source<WebContents>(source)->GetBrowserContext()) {
// We need to perform locale change check only once, so unsubscribe.
registrar_.Remove(this, content::NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
content::NotificationService::AllSources());
Check();
}
break;
}
case chrome::NOTIFICATION_OWNERSHIP_CHECKED: {
if (UserManager::Get()->IsCurrentUserOwner()) {
PrefService* local_state = g_browser_process->local_state();
if (local_state) {
PrefService* prefs = profile_->GetPrefs();
if (prefs == NULL) {
NOTREACHED();
return;
}
std::string owner_locale =
prefs->GetString(prefs::kApplicationLocale);
if (!owner_locale.empty())
local_state->SetString(prefs::kOwnerLocale, owner_locale);
}
}
break;
}
default: {
NOTREACHED();
break;
}
}
}
void LocaleChangeGuard::Check() {
if (note_ != NULL) {
// Somehow we are invoked more than once. Once is enough.
return;
}
std::string cur_locale = g_browser_process->GetApplicationLocale();
if (cur_locale.empty()) {
NOTREACHED();
return;
}
PrefService* prefs = profile_->GetPrefs();
if (prefs == NULL) {
NOTREACHED();
return;
}
std::string to_locale = prefs->GetString(prefs::kApplicationLocale);
if (to_locale != cur_locale) {
// This conditional branch can occur in cases like:
// (1) kApplicationLocale preference was modified by synchronization;
// (2) kApplicationLocale is managed by policy.
return;
}
std::string from_locale = prefs->GetString(prefs::kApplicationLocaleBackup);
if (from_locale.empty() || from_locale == to_locale)
return; // No locale change was detected, just exit.
if (prefs->GetString(prefs::kApplicationLocaleAccepted) == to_locale)
return; // Already accepted.
// Locale change detected, showing notification.
if (from_locale_ != from_locale || to_locale_ != to_locale) {
// Falling back to showing message in current locale.
LOG(ERROR) <<
"Showing locale change notification in current (not previous) language";
PrepareChangingLocale(from_locale, to_locale);
}
if (!CommandLine::ForCurrentProcess()->HasSwitch(
ash::switches::kAshNotifyDisabled)) {
ash::Shell::GetInstance()->system_tray()->locale_observer()->
OnLocaleChanged(this, cur_locale, from_locale_, to_locale_);
return;
}
note_.reset(new chromeos::SystemNotification(
profile_,
new Delegate(this),
IDR_NOTIFICATION_LOCALE_CHANGE,
title_text_));
note_->Show(
message_text_, revert_link_text_,
base::Bind(&LocaleChangeGuard::RevertLocaleChangeCallback,
AsWeakPtr()),
true, // urgent
false); // non-sticky
}
void LocaleChangeGuard::AcceptLocaleChange() {
if (profile_ == NULL ||
from_locale_.empty() ||
to_locale_.empty()) {
NOTREACHED();
return;
}
// Check whether locale has been reverted or changed.
// If not: mark current locale as accepted.
if (reverted_)
return;
PrefService* prefs = profile_->GetPrefs();
if (prefs == NULL) {
NOTREACHED();
return;
}
if (prefs->GetString(prefs::kApplicationLocale) != to_locale_)
return;
content::RecordAction(UserMetricsAction("LanguageChange_Accept"));
prefs->SetString(prefs::kApplicationLocaleBackup, to_locale_);
prefs->SetString(prefs::kApplicationLocaleAccepted, to_locale_);
}
void LocaleChangeGuard::PrepareChangingLocale(
const std::string& from_locale, const std::string& to_locale) {
std::string cur_locale = g_browser_process->GetApplicationLocale();
if (!from_locale.empty())
from_locale_ = from_locale;
if (!to_locale.empty())
to_locale_ = to_locale;
if (!from_locale_.empty() && !to_locale_.empty()) {
string16 from = l10n_util::GetDisplayNameForLocale(
from_locale_, cur_locale, true);
string16 to = l10n_util::GetDisplayNameForLocale(
to_locale_, cur_locale, true);
title_text_ = l10n_util::GetStringUTF16(
IDS_OPTIONS_SETTINGS_SECTION_TITLE_LANGUAGE);
message_text_ = l10n_util::GetStringFUTF16(
IDS_LOCALE_CHANGE_MESSAGE, from, to);
revert_link_text_ = l10n_util::GetStringFUTF16(
IDS_LOCALE_CHANGE_REVERT_MESSAGE, from);
}
}
void LocaleChangeGuard::Delegate::Close(bool by_user) {
if (by_user)
master_->AcceptLocaleChange();
}
std::string LocaleChangeGuard::Delegate::id() const {
// Arbitrary unique Id.
return "8c386938-1e3f-11e0-ac7b-18a90520e2e5";
}
} // namespace chromeos
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