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 17 package com.android.tv.twopanelsettings.slices; 18 19 import android.content.Context; 20 import android.net.Uri; 21 import android.util.ArrayMap; 22 import android.util.Log; 23 24 import androidx.lifecycle.Observer; 25 26 import com.android.tv.twopanelsettings.slices.PreferenceSliceLiveData.SliceLiveDataImpl; 27 import com.android.tv.twopanelsettings.slices.base.SliceManager; 28 import com.android.tv.twopanelsettings.slices.compat.Slice; 29 30 31 /** 32 * Ensure the SliceLiveData with same uri is created only once across the activity. 33 */ 34 public class ContextSingleton { 35 private static final String TAG = "TvSettingsContext"; 36 private static ContextSingleton sInstance; 37 private ArrayMap<Uri, SliceLiveDataImpl> mSliceMap; 38 private boolean mGivenFullSliceAccess; 39 40 /** 41 * Get the instance. 42 */ getInstance()43 public static ContextSingleton getInstance() { 44 if (sInstance == null) { 45 sInstance = new ContextSingleton(); 46 } 47 return sInstance; 48 } 49 ContextSingleton()50 private ContextSingleton() { 51 mSliceMap = new ArrayMap<>(); 52 mGivenFullSliceAccess = false; 53 } 54 55 /** 56 * Get the corresponding SliceLiveData based on the uri. 57 */ getSliceLiveData(Context context, Uri uri)58 public SliceLiveDataImpl getSliceLiveData(Context context, Uri uri) { 59 if (!mSliceMap.containsKey(uri)) { 60 mSliceMap.put(uri, PreferenceSliceLiveData.fromUri(context, uri)); 61 } 62 63 return mSliceMap.get(uri); 64 } 65 66 /** 67 * Register slice live data observer directly. 68 */ addSliceObserver(Context context, Uri uri, Observer<Slice> observer)69 public void addSliceObserver(Context context, Uri uri, Observer<Slice> observer) { 70 getSliceLiveData(context, uri).observeForever(observer); 71 } 72 73 /** 74 * Unregister slice live data observer directly. 75 */ removeSliceObserver(Context context, Uri uri, Observer<Slice> observer)76 public void removeSliceObserver(Context context, Uri uri, Observer<Slice> observer) { 77 getSliceLiveData(context, uri).removeObserver(observer); 78 } 79 80 /** 81 * Grant full access to current package. 82 */ grantFullAccess(Context ctx, Uri uri)83 public void grantFullAccess(Context ctx, Uri uri) { 84 if (!mGivenFullSliceAccess) { 85 String currentPackageName = ctx.getApplicationContext().getPackageName(); 86 // Uri cannot be null here as SliceManagerService calls notifyChange(uri, null) in 87 // grantPermissionFromUser. 88 SliceManager.from(ctx).grantPermissionFromUser( 89 uri, currentPackageName, true); 90 mGivenFullSliceAccess = true; 91 } 92 } 93 94 /** 95 * Grant full access to specific package. 96 */ grantFullAccess(Context ctx, String uri, String packageName)97 public void grantFullAccess(Context ctx, String uri, String packageName) { 98 try { 99 SliceManager.from(ctx).grantPermissionFromUser( 100 Uri.parse(uri), packageName, true); 101 } catch (Exception e) { 102 Log.e(TAG, "Cannot grant full access to " + packageName + " " + e); 103 } 104 } 105 } 106