1 /*
2  * Copyright (C) 2019 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.customization.model.grid;
17 
18 import android.content.ContentResolver;
19 import android.content.ContentValues;
20 import android.content.Context;
21 import android.content.Intent;
22 import android.content.pm.PackageManager;
23 import android.content.pm.ProviderInfo;
24 import android.content.pm.ResolveInfo;
25 import android.content.res.Resources;
26 import android.database.Cursor;
27 import android.net.Uri;
28 import android.text.TextUtils;
29 
30 import androidx.annotation.Nullable;
31 import androidx.annotation.WorkerThread;
32 
33 import com.android.customization.model.ResourceConstants;
34 import com.android.wallpaper.R;
35 
36 import com.bumptech.glide.Glide;
37 
38 import java.util.ArrayList;
39 import java.util.List;
40 
41 /**
42  * Abstracts the logic to retrieve available grid options from the current Launcher.
43  */
44 public class LauncherGridOptionsProvider {
45 
46     private static final String LIST_OPTIONS = "list_options";
47     private static final String PREVIEW = "preview";
48     private static final String DEFAULT_GRID = "default_grid";
49 
50     private static final String COL_NAME = "name";
51     private static final String COL_ROWS = "rows";
52     private static final String COL_COLS = "cols";
53     private static final String COL_PREVIEW_COUNT = "preview_count";
54     private static final String COL_IS_DEFAULT = "is_default";
55 
56     private final Context mContext;
57     private final String mGridProviderAuthority;
58     private final ProviderInfo mProviderInfo;
59     private List<GridOption> mOptions;
60 
LauncherGridOptionsProvider(Context context, String authorityMetadataKey)61     public LauncherGridOptionsProvider(Context context, String authorityMetadataKey) {
62         mContext = context;
63         Intent homeIntent = new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME);
64 
65         ResolveInfo info = context.getPackageManager().resolveActivity(homeIntent,
66                 PackageManager.MATCH_DEFAULT_ONLY | PackageManager.GET_META_DATA);
67         if (info != null && info.activityInfo != null && info.activityInfo.metaData != null) {
68             mGridProviderAuthority = info.activityInfo.metaData.getString(authorityMetadataKey);
69         } else {
70             mGridProviderAuthority = null;
71         }
72         // TODO: check permissions if needed
73         mProviderInfo = TextUtils.isEmpty(mGridProviderAuthority) ? null
74                 : mContext.getPackageManager().resolveContentProvider(mGridProviderAuthority, 0);
75     }
76 
areGridsAvailable()77     boolean areGridsAvailable() {
78         return mProviderInfo != null;
79     }
80 
81     /**
82      * Retrieve the available grids.
83      * @param reload whether to reload grid options if they're cached.
84      */
85     @WorkerThread
86     @Nullable
fetch(boolean reload)87     List<GridOption> fetch(boolean reload) {
88         if (!areGridsAvailable()) {
89             return null;
90         }
91         if (mOptions != null && !reload) {
92             return mOptions;
93         }
94         Uri optionsUri = new Uri.Builder()
95                 .scheme(ContentResolver.SCHEME_CONTENT)
96                 .authority(mProviderInfo.authority)
97                 .appendPath(LIST_OPTIONS)
98                 .build();
99         ContentResolver resolver = mContext.getContentResolver();
100         String iconPath = mContext.getResources().getString(Resources.getSystem().getIdentifier(
101                 ResourceConstants.CONFIG_ICON_MASK, "string", ResourceConstants.ANDROID_PACKAGE));
102         try (Cursor c = resolver.query(optionsUri, null, null, null, null)) {
103             mOptions = new ArrayList<>();
104             while(c.moveToNext()) {
105                 String name = c.getString(c.getColumnIndex(COL_NAME));
106                 int rows = c.getInt(c.getColumnIndex(COL_ROWS));
107                 int cols = c.getInt(c.getColumnIndex(COL_COLS));
108                 int previewCount = c.getInt(c.getColumnIndex(COL_PREVIEW_COUNT));
109                 boolean isSet = Boolean.valueOf(c.getString(c.getColumnIndex(COL_IS_DEFAULT)));
110                 Uri preview = new Uri.Builder()
111                         .scheme(ContentResolver.SCHEME_CONTENT)
112                         .authority(mProviderInfo.authority)
113                         .appendPath(PREVIEW)
114                         .appendPath(name)
115                         .build();
116                 String title = mContext.getString(R.string.grid_title_pattern, cols, rows);
117                 mOptions.add(new GridOption(title, name, isSet, rows, cols, preview, previewCount,
118                         iconPath));
119             }
120             Glide.get(mContext).clearDiskCache();
121         } catch (Exception e) {
122             mOptions = null;
123         }
124         return mOptions;
125     }
126 
applyGrid(String name)127     int applyGrid(String name) {
128         Uri updateDefaultUri = new Uri.Builder()
129                 .scheme(ContentResolver.SCHEME_CONTENT)
130                 .authority(mProviderInfo.authority)
131                 .appendPath(DEFAULT_GRID)
132                 .build();
133         ContentValues values = new ContentValues();
134         values.put("name", name);
135         return mContext.getContentResolver().update(updateDefaultUri, values, null, null);
136     }
137 }
138