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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/kiosk_mode/kiosk_mode_settings.h"
#include <algorithm>
#include "base/bind.h"
#include "base/command_line.h"
#include "base/lazy_instance.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chromeos/cros_settings.h"
#include "chrome/browser/chromeos/cros_settings_names.h"
#include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.h"
#include "chrome/browser/chromeos/login/user_manager.h"
#include "chrome/browser/policy/cloud_policy_constants.h"
#include "chrome/browser/policy/browser_policy_connector.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/common/chrome_switches.h"
namespace chromeos {
namespace {
const int kDeviceModeFetchRetryDelayMs = 500;
}
const int KioskModeSettings::kMaxIdleLogoutTimeout = 600000; // ms
const int KioskModeSettings::kMinIdleLogoutTimeout = 5000; // ms
const int KioskModeSettings::kMaxIdleLogoutWarningDuration = 60000; // ms
const int KioskModeSettings::kMinIdleLogoutWarningDuration = 1000; // ms
static base::LazyInstance<KioskModeSettings> g_kiosk_mode_settings =
LAZY_INSTANCE_INITIALIZER;
// static
KioskModeSettings* KioskModeSettings::Get() {
return g_kiosk_mode_settings.Pointer();
}
bool KioskModeSettings::IsKioskModeEnabled() {
return is_kiosk_mode_;
}
void KioskModeSettings::Initialize(const base::Closure& notify_initialized) {
// No need to call more than once.
if (is_initialized_) {
notify_initialized.Run();
return;
}
CrosSettings* cros_settings = CrosSettings::Get();
if (!cros_settings->PrepareTrustedValues(
base::Bind(&KioskModeSettings::Initialize,
base::Unretained(this),
notify_initialized))) {
return;
}
// Ignored till we land the code to pull the screensaver path from the app
// packs with the screensaver id.
cros_settings->GetString(kScreenSaverExtensionId, &screensaver_id_);
int screensaver_timeout = 0;
int idle_logout_timeout = 0;
int idle_logout_warning_duration = 0;
cros_settings->GetInteger(kScreenSaverTimeout, &screensaver_timeout);
cros_settings->GetInteger(kIdleLogoutTimeout, &idle_logout_timeout);
cros_settings->GetInteger(kIdleLogoutWarningDuration,
&idle_logout_warning_duration);
// Restrict idle timeouts to safe values to prevent them from being turned off
// or otherwise misused.
idle_logout_timeout = std::min(idle_logout_timeout,
KioskModeSettings::kMaxIdleLogoutTimeout);
idle_logout_timeout = std::max(idle_logout_timeout,
KioskModeSettings::kMinIdleLogoutTimeout);
idle_logout_warning_duration =
std::min(idle_logout_warning_duration,
KioskModeSettings::kMaxIdleLogoutWarningDuration);
idle_logout_warning_duration =
std::max(idle_logout_warning_duration,
KioskModeSettings::kMinIdleLogoutWarningDuration);
screensaver_timeout_ = base::TimeDelta::FromMilliseconds(
screensaver_timeout);
idle_logout_timeout_ =
base::TimeDelta::FromMilliseconds(idle_logout_timeout);
idle_logout_warning_duration_ =
base::TimeDelta::FromMilliseconds(idle_logout_warning_duration);
is_initialized_ = true;
notify_initialized.Run();
}
bool KioskModeSettings::is_initialized() const {
return is_initialized_;
}
void KioskModeSettings::GetScreensaverPath(
policy::AppPackUpdater::ScreenSaverUpdateCallback callback) const {
if (!is_initialized_) {
callback.Run(FilePath());
return;
}
// Command line flag overrides policy since it can be used
// for testing and dev workflows.
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kKioskModeScreensaverPath)) {
callback.Run(FilePath(
CommandLine::ForCurrentProcess()->
GetSwitchValueASCII(switches::kKioskModeScreensaverPath)));
return;
}
if (g_browser_process) {
policy::BrowserPolicyConnector* bpc =
g_browser_process->browser_policy_connector();
if (bpc && bpc->GetAppPackUpdater()) {
bpc->GetAppPackUpdater()->SetScreenSaverUpdateCallback(callback);
return;
}
}
}
base::TimeDelta KioskModeSettings::GetScreensaverTimeout() const {
if (!is_initialized_)
return base::TimeDelta::FromSeconds(-1);
return screensaver_timeout_;
}
base::TimeDelta KioskModeSettings::GetIdleLogoutTimeout() const {
if (!is_initialized_)
return base::TimeDelta::FromSeconds(-1);
return idle_logout_timeout_;
}
base::TimeDelta KioskModeSettings::GetIdleLogoutWarningDuration() const {
if (!is_initialized_)
return base::TimeDelta::FromSeconds(-1);
return idle_logout_warning_duration_;
}
KioskModeSettings::KioskModeSettings() : is_initialized_(false) {
// In case we've force-enabled kiosk mode.
if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableKioskMode)) {
is_kiosk_mode_ = true;
return;
}
// Precache the value as we know it at construction time to avoid serving
// different values to different users.
if (g_browser_process) {
policy::BrowserPolicyConnector* bpc =
g_browser_process->browser_policy_connector();
policy::DeviceMode device_mode = bpc->GetDeviceMode();
if (device_mode == policy::DEVICE_MODE_KIOSK) {
is_kiosk_mode_ = true;
return;
} else if (device_mode == policy::DEVICE_MODE_PENDING){
content::BrowserThread::PostDelayedTask(
content::BrowserThread::UI, FROM_HERE,
base::Bind(&KioskModeSettings::VerifyModeIsKnown,
base::Unretained(this)),
kDeviceModeFetchRetryDelayMs);
}
}
is_kiosk_mode_ = false;
}
KioskModeSettings::~KioskModeSettings() {
}
void KioskModeSettings::VerifyModeIsKnown() {
if (g_browser_process) {
policy::BrowserPolicyConnector* bpc =
g_browser_process->browser_policy_connector();
policy::DeviceMode device_mode = bpc->GetDeviceMode();
// We retry asking for the mode until it becomes known.
switch (device_mode) {
case policy::DEVICE_MODE_PENDING:
content::BrowserThread::PostDelayedTask(
content::BrowserThread::UI, FROM_HERE,
base::Bind(&KioskModeSettings::VerifyModeIsKnown,
base::Unretained(this)),
kDeviceModeFetchRetryDelayMs);
break;
case policy::DEVICE_MODE_KIOSK:
BrowserList::ExitCleanly();
break;
default:
break;
}
}
}
} // namespace chromeos
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