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      1 /*
      2  * Copyright (C) 2019 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.systemui.theme;
     17 
     18 import android.app.ActivityManager;
     19 import android.content.BroadcastReceiver;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.IntentFilter;
     23 import android.content.om.OverlayManager;
     24 import android.content.pm.UserInfo;
     25 import android.database.ContentObserver;
     26 import android.net.Uri;
     27 import android.os.AsyncTask;
     28 import android.os.Handler;
     29 import android.os.UserHandle;
     30 import android.os.UserManager;
     31 import android.provider.Settings;
     32 import android.text.TextUtils;
     33 import android.util.ArrayMap;
     34 import android.util.Log;
     35 
     36 import com.android.systemui.Dependency;
     37 import com.android.systemui.R;
     38 import com.android.systemui.SystemUI;
     39 
     40 import com.google.android.collect.Sets;
     41 
     42 import org.json.JSONException;
     43 import org.json.JSONObject;
     44 
     45 import java.util.Map;
     46 import java.util.Set;
     47 
     48 /**
     49  * Controls the application of theme overlays across the system for all users.
     50  * This service is responsible for:
     51  * - Observing changes to Settings.Secure.THEME_CUSTOMIZATION_OVERLAY_PACKAGES and applying the
     52  * corresponding overlays across the system
     53  * - Observing user switches, applying the overlays for the current user to user 0 (for systemui)
     54  * - Observing work profile changes and applying overlays from the primary user to their
     55  * associated work profiles
     56  */
     57 public class ThemeOverlayController extends SystemUI {
     58     private static final String TAG = "ThemeOverlayController";
     59     private static final boolean DEBUG = false;
     60 
     61     private ThemeOverlayManager mThemeManager;
     62     private UserManager mUserManager;
     63 
     64     @Override
     65     public void start() {
     66         if (DEBUG) Log.d(TAG, "Start");
     67         mUserManager = mContext.getSystemService(UserManager.class);
     68         mThemeManager = new ThemeOverlayManager(
     69                 mContext.getSystemService(OverlayManager.class),
     70                 AsyncTask.THREAD_POOL_EXECUTOR,
     71                 mContext.getString(R.string.launcher_overlayable_package),
     72                 mContext.getString(R.string.themepicker_overlayable_package));
     73         final Handler bgHandler = Dependency.get(Dependency.BG_HANDLER);
     74         final IntentFilter filter = new IntentFilter();
     75         filter.addAction(Intent.ACTION_USER_SWITCHED);
     76         filter.addAction(Intent.ACTION_MANAGED_PROFILE_ADDED);
     77         mContext.registerReceiverAsUser(new BroadcastReceiver() {
     78             @Override
     79             public void onReceive(Context context, Intent intent) {
     80                 if (DEBUG) Log.d(TAG, "Updating overlays for user switch / profile added.");
     81                 updateThemeOverlays();
     82             }
     83         }, UserHandle.ALL, filter, null, bgHandler);
     84         mContext.getContentResolver().registerContentObserver(
     85                 Settings.Secure.getUriFor(Settings.Secure.THEME_CUSTOMIZATION_OVERLAY_PACKAGES),
     86                 false,
     87                 new ContentObserver(bgHandler) {
     88                     @Override
     89                     public void onChange(boolean selfChange, Uri uri, int userId) {
     90                         if (DEBUG) Log.d(TAG, "Overlay changed for user: " + userId);
     91                         if (ActivityManager.getCurrentUser() == userId) {
     92                             updateThemeOverlays();
     93                         }
     94                     }
     95                 },
     96                 UserHandle.USER_ALL);
     97     }
     98 
     99     private void updateThemeOverlays() {
    100         final int currentUser = ActivityManager.getCurrentUser();
    101         final String overlayPackageJson = Settings.Secure.getStringForUser(
    102                 mContext.getContentResolver(), Settings.Secure.THEME_CUSTOMIZATION_OVERLAY_PACKAGES,
    103                 currentUser);
    104         if (DEBUG) Log.d(TAG, "updateThemeOverlays: " + overlayPackageJson);
    105         final Map<String, String> categoryToPackage = new ArrayMap<>();
    106         if (!TextUtils.isEmpty(overlayPackageJson)) {
    107             try {
    108                 JSONObject object = new JSONObject(overlayPackageJson);
    109                 for (String category : ThemeOverlayManager.THEME_CATEGORIES) {
    110                     if (object.has(category)) {
    111                         categoryToPackage.put(category, object.getString(category));
    112                     }
    113                 }
    114             } catch (JSONException e) {
    115                 Log.i(TAG, "Failed to parse THEME_CUSTOMIZATION_OVERLAY_PACKAGES.", e);
    116             }
    117         }
    118         Set<UserHandle> userHandles = Sets.newHashSet(UserHandle.of(currentUser));
    119         for (UserInfo userInfo : mUserManager.getEnabledProfiles(currentUser)) {
    120             if (userInfo.isManagedProfile()) {
    121                 userHandles.add(userInfo.getUserHandle());
    122             }
    123         }
    124         mThemeManager.applyCurrentUserOverlays(categoryToPackage, userHandles);
    125     }
    126 }
    127