1 /* <lambda>null2 * 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.intentresolver.contentpreview 18 19 import android.content.ContentResolver 20 import android.graphics.Bitmap 21 import android.net.Uri 22 import android.util.Size 23 import com.android.intentresolver.util.withCancellationSignal 24 import javax.inject.Inject 25 26 /** Interface for objects that can attempt load a [Bitmap] from a [Uri]. */ 27 interface ThumbnailLoader { 28 /** 29 * Loads a thumbnail for the given [uri]. 30 * 31 * The size of the thumbnail is determined by the implementation. 32 */ 33 suspend fun loadThumbnail(uri: Uri): Bitmap? 34 35 /** 36 * Loads a thumbnail for the given [uri] and [size]. 37 * 38 * The [size] is the size of the thumbnail in pixels. 39 */ 40 suspend fun loadThumbnail(uri: Uri, size: Size): Bitmap? 41 } 42 43 /** Default implementation of [ThumbnailLoader]. */ 44 class ThumbnailLoaderImpl 45 @Inject 46 constructor( 47 private val contentResolver: ContentResolver, 48 @ThumbnailSize thumbnailSize: Int, 49 ) : ThumbnailLoader { 50 51 private val size = Size(thumbnailSize, thumbnailSize) 52 loadThumbnailnull53 override suspend fun loadThumbnail(uri: Uri): Bitmap = 54 contentResolver.loadThumbnail(uri, size, /* signal= */ null) 55 56 override suspend fun loadThumbnail(uri: Uri, size: Size): Bitmap = 57 withCancellationSignal { signal -> 58 contentResolver.loadThumbnail(uri, size, signal) 59 } 60 } 61