1 /*
2  * Copyright (C) 2018 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.launcher3.model;
17 
18 import android.content.Context;
19 import android.util.Log;
20 
21 import androidx.annotation.WorkerThread;
22 
23 import com.android.launcher3.LauncherAppState;
24 import com.android.launcher3.LauncherModel;
25 import com.android.launcher3.LauncherModel.ModelUpdateTask;
26 import com.android.launcher3.model.BgDataModel.Callbacks;
27 
28 import java.util.concurrent.Executor;
29 
30 /**
31  * Utility class to preload LauncherModel
32  */
33 public class ModelPreload implements ModelUpdateTask {
34 
35     private static final String TAG = "ModelPreload";
36 
37     private LauncherAppState mApp;
38     private LauncherModel mModel;
39     private BgDataModel mBgDataModel;
40     private AllAppsList mAllAppsList;
41 
42     @Override
init(LauncherAppState app, LauncherModel model, BgDataModel dataModel, AllAppsList allAppsList, Executor uiExecutor)43     public final void init(LauncherAppState app, LauncherModel model, BgDataModel dataModel,
44             AllAppsList allAppsList, Executor uiExecutor) {
45         mApp = app;
46         mModel = model;
47         mBgDataModel = dataModel;
48         mAllAppsList = allAppsList;
49     }
50 
51     @Override
run()52     public final void run() {
53         mModel.startLoaderForResultsIfNotLoaded(
54                 new LoaderResults(mApp, mBgDataModel, mAllAppsList, new Callbacks[0]));
55         Log.d(TAG, "Preload completed : " + mModel.isModelLoaded());
56         onComplete(mModel.isModelLoaded());
57     }
58 
59     /**
60      * Called when the task is complete
61      */
62     @WorkerThread
onComplete(boolean isSuccess)63     public void onComplete(boolean isSuccess) { }
64 
start(Context context)65     public void start(Context context) {
66         LauncherAppState.getInstance(context).getModel().enqueueModelUpdateTask(this);
67     }
68 }