| /* |
| * Copyright (C) 2012 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.server.wm; |
| |
| import android.app.ActivityManagerNative; |
| import android.app.admin.DevicePolicyManager; |
| import android.content.Context; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.os.TokenWatcher; |
| import android.util.Log; |
| import android.util.Pair; |
| import android.view.WindowManagerPolicy; |
| |
| public class KeyguardDisableHandler extends Handler { |
| private static final String TAG = "KeyguardDisableHandler"; |
| |
| private static final int ALLOW_DISABLE_YES = 1; |
| private static final int ALLOW_DISABLE_NO = 0; |
| private static final int ALLOW_DISABLE_UNKNOWN = -1; // check with DevicePolicyManager |
| private int mAllowDisableKeyguard = ALLOW_DISABLE_UNKNOWN; // sync'd by mKeyguardTokenWatcher |
| |
| // Message.what constants |
| static final int KEYGUARD_DISABLE = 1; |
| static final int KEYGUARD_REENABLE = 2; |
| static final int KEYGUARD_POLICY_CHANGED = 3; |
| |
| final Context mContext; |
| final WindowManagerPolicy mPolicy; |
| KeyguardTokenWatcher mKeyguardTokenWatcher; |
| |
| public KeyguardDisableHandler(final Context context, final WindowManagerPolicy policy) { |
| mContext = context; |
| mPolicy = policy; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void handleMessage(Message msg) { |
| if (mKeyguardTokenWatcher == null) { |
| mKeyguardTokenWatcher = new KeyguardTokenWatcher(this); |
| } |
| |
| switch (msg.what) { |
| case KEYGUARD_DISABLE: |
| final Pair<IBinder, String> pair = (Pair<IBinder, String>)msg.obj; |
| mKeyguardTokenWatcher.acquire(pair.first, pair.second); |
| break; |
| |
| case KEYGUARD_REENABLE: |
| mKeyguardTokenWatcher.release((IBinder)msg.obj); |
| break; |
| |
| case KEYGUARD_POLICY_CHANGED: |
| mAllowDisableKeyguard = ALLOW_DISABLE_UNKNOWN; |
| if (mKeyguardTokenWatcher.isAcquired()) { |
| // If we are currently disabled we need to know if the keyguard |
| // should be re-enabled, so determine the allow state immediately. |
| mKeyguardTokenWatcher.updateAllowState(); |
| if (mAllowDisableKeyguard != ALLOW_DISABLE_YES) { |
| mPolicy.enableKeyguard(true); |
| } |
| } else { |
| // lazily evaluate this next time we're asked to disable keyguard |
| mPolicy.enableKeyguard(true); |
| } |
| break; |
| } |
| } |
| |
| class KeyguardTokenWatcher extends TokenWatcher { |
| |
| public KeyguardTokenWatcher(final Handler handler) { |
| super(handler, TAG); |
| } |
| |
| public void updateAllowState() { |
| // We fail safe and prevent disabling keyguard in the unlikely event this gets |
| // called before DevicePolicyManagerService has started. |
| DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService( |
| Context.DEVICE_POLICY_SERVICE); |
| if (dpm != null) { |
| try { |
| mAllowDisableKeyguard = dpm.getPasswordQuality(null, |
| ActivityManagerNative.getDefault().getCurrentUser().id) |
| == DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED ? |
| ALLOW_DISABLE_YES : ALLOW_DISABLE_NO; |
| } catch (RemoteException re) { |
| // Nothing much we can do |
| } |
| } |
| } |
| |
| @Override |
| public void acquired() { |
| if (mAllowDisableKeyguard == ALLOW_DISABLE_UNKNOWN) { |
| updateAllowState(); |
| } |
| if (mAllowDisableKeyguard == ALLOW_DISABLE_YES) { |
| mPolicy.enableKeyguard(false); |
| } else { |
| Log.v(TAG, "Not disabling keyguard since device policy is enforced"); |
| } |
| } |
| |
| @Override |
| public void released() { |
| mPolicy.enableKeyguard(true); |
| } |
| } |
| } |