1 /* 2 * 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.systemui.scene.session.shared 18 19 import androidx.compose.runtime.RememberObserver 20 import androidx.compose.runtime.getValue 21 import androidx.compose.runtime.mutableStateOf 22 import androidx.compose.runtime.setValue 23 24 /** Data store for [Session][com.android.systemui.scene.session.ui.composable.Session]. */ 25 class SessionStorage { 26 private var _storage by mutableStateOf(hashMapOf<String, StorageEntry>()) 27 28 /** 29 * Data store containing all state retained for invocations of 30 * [rememberSession][com.android.systemui.scene.session.ui.composable.Session.rememberSession] 31 */ 32 val storage: MutableMap<String, StorageEntry> 33 get() = _storage 34 35 /** 36 * Storage for an individual invocation of 37 * [rememberSession][com.android.systemui.scene.session.ui.composable.Session.rememberSession] 38 */ 39 class StorageEntry(val keys: Array<out Any?>, var stored: Any?) 40 41 /** Clears the data store; any downstream usage within `@Composable`s will be recomposed. */ clearnull42 fun clear() { 43 for (storageEntry in _storage.values) { 44 (storageEntry.stored as? RememberObserver)?.onForgotten() 45 } 46 _storage = hashMapOf() 47 } 48 } 49