1 /*
<lambda>null2  * Copyright (C) 2024 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.settings.datausage
18 
19 import android.content.Context
20 import android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID
21 import com.android.settings.R
22 import com.android.settings.Settings.DataSaverSummaryActivity
23 import com.android.settings.flags.Flags
24 import com.android.settings.utils.makeLaunchIntent
25 import com.android.settingslib.datastore.HandlerExecutor
26 import com.android.settingslib.datastore.KeyedObserver
27 import com.android.settingslib.metadata.PreferenceAvailabilityProvider
28 import com.android.settingslib.metadata.PreferenceLifecycleContext
29 import com.android.settingslib.metadata.PreferenceLifecycleProvider
30 import com.android.settingslib.metadata.PreferenceMetadata
31 import com.android.settingslib.metadata.PreferenceSummaryProvider
32 import com.android.settingslib.metadata.ProvidePreferenceScreen
33 import com.android.settingslib.metadata.preferenceHierarchy
34 import com.android.settingslib.preference.PreferenceScreenCreator
35 import com.android.settings.datausage.DataSaverMainSwitchPreference.Companion.KEY as DATA_SAVER_KEY
36 
37 @ProvidePreferenceScreen
38 class DataSaverScreen(context: Context) :
39     PreferenceScreenCreator,
40     PreferenceAvailabilityProvider,
41     PreferenceSummaryProvider,
42     PreferenceLifecycleProvider {
43 
44     private val dataSaverStore = DataSaverMainSwitchPreference.createDataStore(context)
45     private lateinit var keyedObserver: KeyedObserver<String>
46 
47     override val key
48         get() = KEY
49 
50     override val title
51         get() = R.string.data_saver_title
52 
53     override val icon: Int
54         get() = R.drawable.ic_settings_data_usage
55 
56     override fun isIndexable(context: Context) =
57         DataUsageUtils.hasMobileData(context) &&
58             DataUsageUtils.getDefaultSubscriptionId(context) != INVALID_SUBSCRIPTION_ID
59 
60     override fun getSummary(context: Context): CharSequence? =
61         when {
62             dataSaverStore.getBoolean(DATA_SAVER_KEY) == true ->
63                 context.getString(R.string.data_saver_on)
64             else -> context.getString(R.string.data_saver_off)
65         }
66 
67     override fun isAvailable(context: Context) =
68         context.resources.getBoolean(R.bool.config_show_data_saver)
69 
70     override fun isFlagEnabled(context: Context) = Flags.catalystRestrictBackgroundParentEntry()
71 
72     override fun fragmentClass() = DataSaverSummary::class.java
73 
74     override fun getLaunchIntent(context: Context, metadata: PreferenceMetadata?) =
75         makeLaunchIntent(context, DataSaverSummaryActivity::class.java, metadata?.key)
76 
77     override fun getPreferenceHierarchy(context: Context) =
78         preferenceHierarchy(this) { +DataSaverMainSwitchPreference() }
79 
80     override fun hasCompleteHierarchy() = false
81 
82     override fun onCreate(context: PreferenceLifecycleContext) {
83         keyedObserver = KeyedObserver { _, _ -> context.notifyPreferenceChange(KEY) }
84         dataSaverStore.addObserver(DATA_SAVER_KEY, keyedObserver, HandlerExecutor.main)
85     }
86 
87     override fun onDestroy(context: PreferenceLifecycleContext) {
88         dataSaverStore.removeObserver(DATA_SAVER_KEY, keyedObserver)
89     }
90 
91     companion object {
92         const val KEY = "restrict_background_parent_entry"
93     }
94 }
95