1 /*
2  * Copyright (C) 2023 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.systemui.display.data.repository
18 
19 import android.content.Context
20 import android.content.res.Configuration
21 import android.util.DisplayMetrics
22 import com.android.systemui.common.coroutine.ConflatedCallbackFlow.conflatedCallbackFlow
23 import com.android.systemui.dagger.SysUISingleton
24 import com.android.systemui.dagger.qualifiers.Application
25 import com.android.systemui.log.LogBuffer
26 import com.android.systemui.log.core.LogLevel
27 import com.android.systemui.log.dagger.DisplayMetricsRepoLog
28 import com.android.systemui.statusbar.policy.ConfigurationController
29 import javax.inject.Inject
30 import kotlinx.coroutines.CoroutineScope
31 import kotlinx.coroutines.channels.awaitClose
32 import kotlinx.coroutines.flow.SharingStarted
33 import kotlinx.coroutines.flow.StateFlow
34 import kotlinx.coroutines.flow.onEach
35 import kotlinx.coroutines.flow.stateIn
36 
37 /** Repository tracking display-related metrics like display height and width. */
38 @SysUISingleton
39 class DisplayMetricsRepository
40 @Inject
41 constructor(
42     @Application scope: CoroutineScope,
43     configurationController: ConfigurationController,
44     displayMetricsHolder: DisplayMetrics,
45     context: Context,
46     @DisplayMetricsRepoLog logBuffer: LogBuffer,
47 ) {
48 
49     private val displayMetrics: StateFlow<DisplayMetrics> =
<lambda>null50         conflatedCallbackFlow {
51                 val callback =
52                     object : ConfigurationController.ConfigurationListener {
53                         override fun onConfigChanged(newConfig: Configuration?) {
54                             context.display?.getMetrics(displayMetricsHolder)
55                             trySend(displayMetricsHolder)
56                         }
57                     }
58                 configurationController.addCallback(callback)
59                 awaitClose { configurationController.removeCallback(callback) }
60             }
<lambda>null61             .onEach {
62                 logBuffer.log(
63                     "DisplayMetrics",
64                     LogLevel.INFO,
65                     { str1 = it.toString() },
66                     { "New metrics: $str1" },
67                 )
68             }
69             .stateIn(scope, SharingStarted.Eagerly, displayMetricsHolder)
70 
71     /** Returns the current display height in pixels. */
72     val heightPixels: Int
73         get() = displayMetrics.value.heightPixels
74 }
75