1 /* 2 * Copyright (C) 2017 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.wallpaper.asset; 17 18 import android.graphics.drawable.Drawable; 19 20 import com.bumptech.glide.Priority; 21 import com.bumptech.glide.load.DataSource; 22 import com.bumptech.glide.load.Options; 23 import com.bumptech.glide.load.data.DataFetcher; 24 import com.bumptech.glide.load.model.ModelLoader; 25 import com.bumptech.glide.load.model.ModelLoaderFactory; 26 import com.bumptech.glide.load.model.MultiModelLoaderFactory; 27 28 import androidx.annotation.Nullable; 29 30 /** 31 * Glide model loader for live wallpaper thumbnails. 32 */ 33 public class LiveWallpaperThumbAssetLoader implements 34 ModelLoader<LiveWallpaperThumbAsset, Drawable> { 35 36 @Override handles(LiveWallpaperThumbAsset liveWallpaperThumbAsset)37 public boolean handles(LiveWallpaperThumbAsset liveWallpaperThumbAsset) { 38 return true; 39 } 40 41 @Nullable 42 @Override buildLoadData(LiveWallpaperThumbAsset liveWallpaperThumbAsset, int unusedWidth, int unusedHeight, Options options)43 public LoadData<Drawable> buildLoadData(LiveWallpaperThumbAsset liveWallpaperThumbAsset, 44 int unusedWidth, int unusedHeight, Options options) { 45 return new LoadData<>(liveWallpaperThumbAsset.getKey(), 46 new LiveWallpaperThumbFetcher(liveWallpaperThumbAsset)); 47 } 48 49 /** 50 * Factory that constructs {@link LiveWallpaperThumbAssetLoader} instances. 51 */ 52 public static class LiveWallpaperThumbAssetLoaderFactory 53 implements ModelLoaderFactory<LiveWallpaperThumbAsset, Drawable> { LiveWallpaperThumbAssetLoaderFactory()54 public LiveWallpaperThumbAssetLoaderFactory() { 55 } 56 57 @Override build( MultiModelLoaderFactory multiFactory)58 public ModelLoader<LiveWallpaperThumbAsset, Drawable> build( 59 MultiModelLoaderFactory multiFactory) { 60 return new LiveWallpaperThumbAssetLoader(); 61 } 62 63 @Override teardown()64 public void teardown() { 65 // no-op 66 } 67 } 68 69 /** 70 * Fetcher class for fetching wallpaper image data from a {@link LiveWallpaperThumbAsset}. 71 */ 72 private static class LiveWallpaperThumbFetcher implements DataFetcher<Drawable> { 73 74 private LiveWallpaperThumbAsset mLiveWallpaperThumbAsset; 75 LiveWallpaperThumbFetcher(LiveWallpaperThumbAsset liveWallpaperThumbAsset)76 public LiveWallpaperThumbFetcher(LiveWallpaperThumbAsset liveWallpaperThumbAsset) { 77 mLiveWallpaperThumbAsset = liveWallpaperThumbAsset; 78 } 79 80 @Override loadData(Priority priority, DataCallback<? super Drawable> callback)81 public void loadData(Priority priority, DataCallback<? super Drawable> callback) { 82 callback.onDataReady(mLiveWallpaperThumbAsset.getThumbnailDrawable()); 83 } 84 85 @Override getDataSource()86 public DataSource getDataSource() { 87 return DataSource.LOCAL; 88 } 89 90 @Override cancel()91 public void cancel() { 92 // no-op 93 } 94 95 @Override cleanup()96 public void cleanup() { 97 // no-op 98 } 99 100 @Override getDataClass()101 public Class<Drawable> getDataClass() { 102 return Drawable.class; 103 } 104 } 105 } 106