1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.server.notification; 17 18 import android.app.Notification; 19 import android.app.NotificationManager; 20 import android.app.admin.DevicePolicyManager; 21 import android.content.Context; 22 import android.os.UserHandle; 23 import android.util.Slog; 24 25 /** 26 * Determines if the given notification can display sensitive content on the lockscreen. 27 */ 28 public class VisibilityExtractor implements NotificationSignalExtractor { 29 private static final String TAG = "VisibilityExtractor"; 30 private static final boolean DBG = false; 31 32 private RankingConfig mConfig; 33 private DevicePolicyManager mDpm; 34 initialize(Context ctx, NotificationUsageStats usageStats)35 public void initialize(Context ctx, NotificationUsageStats usageStats) { 36 if (DBG) Slog.d(TAG, "Initializing " + getClass().getSimpleName() + "."); 37 mDpm = ctx.getSystemService(DevicePolicyManager.class); 38 } 39 process(NotificationRecord record)40 public RankingReconsideration process(NotificationRecord record) { 41 if (record == null || record.getNotification() == null) { 42 if (DBG) Slog.d(TAG, "skipping empty notification"); 43 return null; 44 } 45 46 if (mConfig == null) { 47 if (DBG) Slog.d(TAG, "missing config"); 48 return null; 49 } 50 51 int userId = record.getUserId(); 52 53 if (userId == UserHandle.USER_ALL) { 54 record.setPackageVisibilityOverride(record.getChannel().getLockscreenVisibility()); 55 } else { 56 boolean userCanShowNotifications = 57 mConfig.canShowNotificationsOnLockscreen(userId); 58 boolean dpmCanShowNotifications = adminAllowsKeyguardFeature(userId, 59 DevicePolicyManager.KEYGUARD_DISABLE_SECURE_NOTIFICATIONS); 60 boolean channelCanShowNotifications = record.getChannel().getLockscreenVisibility() 61 != Notification.VISIBILITY_SECRET; 62 63 if (!userCanShowNotifications || !dpmCanShowNotifications 64 || !channelCanShowNotifications) { 65 record.setPackageVisibilityOverride(Notification.VISIBILITY_SECRET); 66 } else { 67 // notifications are allowed but should they be redacted? 68 69 boolean userCanShowContents = 70 mConfig.canShowPrivateNotificationsOnLockScreen(userId); 71 boolean dpmCanShowContents = adminAllowsKeyguardFeature(userId, 72 DevicePolicyManager.KEYGUARD_DISABLE_UNREDACTED_NOTIFICATIONS); 73 boolean channelCanShowContents = record.getChannel().getLockscreenVisibility() 74 != Notification.VISIBILITY_PRIVATE; 75 76 if (!userCanShowContents || !dpmCanShowContents || !channelCanShowContents) { 77 record.setPackageVisibilityOverride(Notification.VISIBILITY_PRIVATE); 78 } else { 79 record.setPackageVisibilityOverride(NotificationManager.VISIBILITY_NO_OVERRIDE); 80 } 81 } 82 } 83 84 return null; 85 } 86 87 @Override setConfig(RankingConfig config)88 public void setConfig(RankingConfig config) { 89 mConfig = config; 90 } 91 92 @Override setZenHelper(ZenModeHelper helper)93 public void setZenHelper(ZenModeHelper helper) { 94 95 } 96 adminAllowsKeyguardFeature(int userHandle, int feature)97 private boolean adminAllowsKeyguardFeature(int userHandle, int feature) { 98 if (userHandle == UserHandle.USER_ALL) { 99 return true; 100 } 101 final int dpmFlags = mDpm.getKeyguardDisabledFeatures(null /* admin */, userHandle); 102 return (dpmFlags & feature) == 0; 103 } 104 105 } 106