1 /* <lambda>null2 * Copyright (C) 2022 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.shared.condition 18 19 /** 20 * A higher order [Condition] which combines multiple conditions with a specified 21 * [Evaluator.ConditionOperand]. 22 */ 23 internal class CombinedCondition 24 constructor( 25 private val conditions: Collection<Condition>, 26 @Evaluator.ConditionOperand private val operand: Int 27 ) : Condition(null, false), Condition.Callback { 28 29 override fun start() { 30 onConditionChanged(this) 31 conditions.forEach { it.addCallback(this) } 32 } 33 34 override fun onConditionChanged(condition: Condition) { 35 Evaluator.evaluate(conditions, operand)?.also { value -> updateCondition(value) } 36 ?: clearCondition() 37 } 38 39 override fun stop() { 40 conditions.forEach { it.removeCallback(this) } 41 } 42 } 43