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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.tv.settings.system.development;
import android.content.Context;
import android.os.SystemProperties;
import android.os.UserHandle;
import android.os.Process;
import android.os.UserManager;
import android.service.oemlock.OemLockManager;
import android.text.TextUtils;
import android.util.Log;
import androidx.preference.Preference;
import androidx.preference.SwitchPreference;
import com.android.tv.settings.R;
public class OemUnlockPreferenceController implements OemUnlockDialog.Callback {
private static final String TAG = OemUnlockPreferenceController.class.getSimpleName();
private final OemLockManager mOemLockManager;
private final UserManager mUserManager;
private final SwitchPreference mPreference;
public OemUnlockPreferenceController(Context context, SwitchPreference preference) {
if (!TextUtils.equals(SystemProperties.get("ro.oem_unlock_supported", "0"), "1")) {
mOemLockManager = null;
Log.w(TAG, "oem_unlock not supported.");
} else {
mOemLockManager = (OemLockManager) context.getSystemService(Context.OEM_LOCK_SERVICE);
}
mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
mPreference = preference;
updateState();
}
public SwitchPreference getPreference() {
return mPreference;
}
public boolean onPreferenceClick() {
if (mOemLockManager == null) {
return false;
}
final boolean allowed = mPreference.isChecked();
if (allowed) {
// Signal to caller to start the confirm dialog.
mPreference.setChecked(false);
return false;
} else {
mPreference.setChecked(false);
mOemLockManager.setOemUnlockAllowedByUser(false);
return true;
}
}
@Override
public void onOemUnlockConfirm() {
if (shouldEnableOemUnlockPreference()) {
mOemLockManager.setOemUnlockAllowedByUser(true);
mPreference.setChecked(true);
}
}
public void updateState() {
mPreference.setEnabled(shouldEnableOemUnlockPreference());
mPreference.setChecked(isOemUnlockedAllowed());
mPreference.setSummary(getPreferenceSummary());
}
private int getPreferenceSummary() {
if (isRestricted()) {
return R.string.disabled_by_policy_title;
} else if (isBootloaderUnlocked()) {
return R.string.oem_unlock_enable_disabled_summary_bootloader_unlocked;
} else if (!isOemUnlockAllowedByUserAndCarrier()) {
return R.string.oem_unlock_enable_disabled_summary_connectivity_or_locked;
} else {
return R.string.oem_unlock_enable_summary;
}
}
private boolean shouldEnableOemUnlockPreference() {
return !isRestricted() && !isBootloaderUnlocked() && isOemUnlockAllowedByUserAndCarrier();
}
/**
* Returns {@code true} if OEM unlocking has been disabled by device policy.
*/
private boolean isRestricted() {
return mUserManager.hasUserRestriction(UserManager.DISALLOW_OEM_UNLOCK)
|| mUserManager.hasUserRestriction(UserManager.DISALLOW_FACTORY_RESET);
}
/**
* Returns {@code true} if the bootloader has been unlocked.
*/
private boolean isBootloaderUnlocked() {
return mOemLockManager != null && mOemLockManager.isDeviceOemUnlocked();
}
/**
* Returns whether OEM unlock is allowed by the user and carrier.
*/
private boolean isOemUnlockAllowedByUserAndCarrier() {
return mOemLockManager != null
&& mOemLockManager.isOemUnlockAllowedByCarrier()
&& !mUserManager.hasBaseUserRestriction(
UserManager.DISALLOW_FACTORY_RESET,
Process.myUserHandle());
}
private boolean isOemUnlockedAllowed() {
return mOemLockManager != null && mOemLockManager.isOemUnlockAllowed();
}
}
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