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      1 /*
      2  * Copyright (C) 2015 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.settings.applications;
     17 
     18 import android.Manifest;
     19 import android.app.AppOpsManager;
     20 import android.content.Context;
     21 
     22 import com.android.settingslib.applications.ApplicationsState;
     23 import com.android.settingslib.applications.ApplicationsState.AppEntry;
     24 import com.android.settingslib.applications.ApplicationsState.AppFilter;
     25 
     26 /*
     27  * Connects info of apps that draw overlay to the ApplicationsState. Wraps around the generic
     28  * AppStateAppOpsBridge class to tailor to the semantics of SYSTEM_ALERT_WINDOW. Also provides app
     29  * filters that can use the info.
     30  */
     31 public class AppStateWriteSettingsBridge extends AppStateAppOpsBridge {
     32 
     33     private static final String TAG = "AppStateWriteSettingsBridge";
     34     private static final int APP_OPS_OP_CODE = AppOpsManager.OP_WRITE_SETTINGS;
     35     private static final String PM_WRITE_SETTINGS = Manifest.permission.WRITE_SETTINGS;
     36 
     37     private static final String[] PM_PERMISSIONS = {
     38             PM_WRITE_SETTINGS
     39     };
     40 
     41     public AppStateWriteSettingsBridge(Context context, ApplicationsState appState, Callback
     42             callback) {
     43         super(context, appState, callback, APP_OPS_OP_CODE, PM_PERMISSIONS);
     44     }
     45 
     46     @Override
     47     protected void updateExtraInfo(AppEntry app, String pkg, int uid) {
     48         app.extraInfo = getWriteSettingsInfo(pkg, uid);
     49     }
     50 
     51     public WriteSettingsState getWriteSettingsInfo(String pkg, int uid) {
     52         PermissionState permissionState = super.getPermissionInfo(pkg, uid);
     53         return new WriteSettingsState(permissionState);
     54     }
     55 
     56     // TODO: figure out how to filter out system apps for this method
     57     public int getNumberOfPackagesWithPermission() {
     58         return super.getNumPackagesDeclaredPermission();
     59     }
     60 
     61     // TODO: figure out how to filter out system apps for this method
     62     public int getNumberOfPackagesCanWriteSettings() {
     63         return super.getNumPackagesAllowedByAppOps();
     64     }
     65 
     66     public static class WriteSettingsState extends AppStateAppOpsBridge.PermissionState {
     67         public WriteSettingsState(PermissionState permissionState) {
     68             super(permissionState.packageName, permissionState.userHandle);
     69             this.packageInfo = permissionState.packageInfo;
     70             this.appOpMode = permissionState.appOpMode;
     71             this.permissionDeclared = permissionState.permissionDeclared;
     72             this.staticPermissionGranted = permissionState.staticPermissionGranted;
     73         }
     74     }
     75 
     76     public static final AppFilter FILTER_WRITE_SETTINGS = new AppFilter() {
     77         @Override
     78         public void init() {
     79         }
     80 
     81         @Override
     82         public boolean filterApp(AppEntry info) {
     83             return info.extraInfo != null;
     84         }
     85     };
     86 }
     87