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.intentresolver.contentpreview 18 19 import android.graphics.Bitmap 20 import android.net.Uri 21 import java.util.function.Consumer 22 import kotlinx.coroutines.CoroutineScope 23 24 /** A content preview image loader. */ 25 interface ImageLoader : suspend (Uri) -> Bitmap?, suspend (Uri, Boolean) -> Bitmap? { 26 /** 27 * Load preview image asynchronously; caching is allowed. 28 * 29 * @param uri content URI 30 * @param callback a callback that will be invoked with the loaded image or null if loading has 31 * failed. 32 */ loadImagenull33 fun loadImage(callerScope: CoroutineScope, uri: Uri, callback: Consumer<Bitmap?>) 34 35 /** Prepopulate the image loader cache. */ 36 fun prePopulate(uris: List<Uri>) 37 38 /** Returns a bitmap for the given URI if it's already cached, otherwise null */ 39 fun getCachedBitmap(uri: Uri): Bitmap? = null 40 41 /** Load preview image; caching is allowed. */ 42 override suspend fun invoke(uri: Uri) = invoke(uri, true) 43 44 /** 45 * Load preview image. 46 * 47 * @param uri content URI 48 * @param caching indicates if the loaded image could be cached. 49 */ 50 override suspend fun invoke(uri: Uri, caching: Boolean): Bitmap? 51 } 52