1 /* <lambda>null2 * 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.keyguard 18 19 import android.annotation.WorkerThread 20 import android.content.ComponentCallbacks2 21 import android.util.Log 22 import com.android.systemui.CoreStartable 23 import com.android.systemui.dagger.SysUISingleton 24 import com.android.systemui.dagger.qualifiers.Application 25 import com.android.systemui.dagger.qualifiers.Background 26 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor 27 import com.android.systemui.keyguard.shared.model.KeyguardState.GONE 28 import com.android.systemui.scene.shared.model.Scenes 29 import com.android.systemui.utils.GlobalWindowManager 30 import javax.inject.Inject 31 import kotlinx.coroutines.CoroutineDispatcher 32 import kotlinx.coroutines.CoroutineScope 33 import kotlinx.coroutines.flow.filter 34 import com.android.app.tracing.coroutines.launchTraced as launch 35 36 /** 37 * Releases cached resources on allocated by keyguard. 38 * 39 * We release most resources when device goes idle since that's the least likely time it'll cause 40 * jank during use. Idle in this case means after lockscreen -> AoD transition completes or when the 41 * device screen is turned off, depending on settings. 42 */ 43 @SysUISingleton 44 class ResourceTrimmer 45 @Inject 46 constructor( 47 private val keyguardTransitionInteractor: KeyguardTransitionInteractor, 48 private val globalWindowManager: GlobalWindowManager, 49 @Application private val applicationScope: CoroutineScope, 50 @Background private val bgDispatcher: CoroutineDispatcher, 51 ) : CoreStartable { 52 53 override fun start() { 54 Log.d(LOG_TAG, "Resource trimmer registered.") 55 applicationScope.launch(context = bgDispatcher) { 56 keyguardTransitionInteractor 57 .isFinishedIn(scene = Scenes.Gone, stateWithoutSceneContainer = GONE) 58 .filter { isOnGone -> isOnGone } 59 .collect { onKeyguardGone() } 60 } 61 } 62 63 @WorkerThread 64 private fun onKeyguardGone() { 65 // We want to clear temporary caches we've created while rendering and animating 66 // lockscreen elements, especially clocks. 67 Log.d(LOG_TAG, "Sending TRIM_MEMORY_UI_HIDDEN.") 68 globalWindowManager.trimMemory(ComponentCallbacks2.TRIM_MEMORY_UI_HIDDEN) 69 } 70 71 companion object { 72 private const val LOG_TAG = "ResourceTrimmer" 73 } 74 } 75