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 package com.android.internal.widget.remotecompose.core; 17 18 import android.annotation.NonNull; 19 20 /** 21 * Interface for operators that interact with variables Through this they register to listen to 22 * particular variables and are notified when they change 23 */ 24 public interface VariableSupport { 25 /** 26 * Call to allow an operator to register interest in variables. Typically they call 27 * context.listensTo(id, this) 28 * 29 * @param context 30 */ registerListening(@onNull RemoteContext context)31 void registerListening(@NonNull RemoteContext context); 32 33 /** 34 * Called to be notified that the variables you are interested have changed. 35 * 36 * @param context 37 */ updateVariables(@onNull RemoteContext context)38 void updateVariables(@NonNull RemoteContext context); 39 40 /** Mark the operation as dirty to indicate that the variables it references are out of date. */ markDirty()41 void markDirty(); 42 } 43