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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher3;
import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
import android.appwidget.AppWidgetManager;
import android.content.ComponentName;
import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteQueryBuilder;
import android.net.Uri;
import android.os.Binder;
import android.os.Process;
import android.text.TextUtils;
import android.util.Log;
import com.android.launcher3.LauncherSettings.Favorites;
import com.android.launcher3.model.ModelDbController;
import com.android.launcher3.widget.LauncherWidgetHolder;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.function.ToIntFunction;
public class LauncherProvider extends ContentProvider {
private static final String TAG = "LauncherProvider";
/**
* $ adb shell dumpsys activity provider com.android.launcher3
*/
@Override
public void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
LauncherAppState appState = LauncherAppState.getInstanceNoCreate();
if (appState == null || !appState.getModel().isModelLoaded()) {
return;
}
appState.getModel().dumpState("", fd, writer, args);
}
@Override
public boolean onCreate() {
return true;
}
@Override
public String getType(Uri uri) {
SqlArguments args = new SqlArguments(uri, null, null);
if (TextUtils.isEmpty(args.where)) {
return "vnd.android.cursor.dir/" + args.table;
} else {
return "vnd.android.cursor.item/" + args.table;
}
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
SqlArguments args = new SqlArguments(uri, selection, selectionArgs);
SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
qb.setTables(args.table);
Cursor[] result = new Cursor[1];
executeControllerTask(controller -> {
result[0] = controller.query(args.table, projection, args.where, args.args, sortOrder);
return 0;
});
return result[0];
}
@Override
public Uri insert(Uri uri, ContentValues values) {
int rowId = executeControllerTask(controller -> {
// 1. Ensure that externally added items have a valid item id
int id = controller.generateNewItemId();
values.put(LauncherSettings.Favorites._ID, id);
// 2. In the case of an app widget, and if no app widget id is specified, we
// attempt allocate and bind the widget.
Integer itemType = values.getAsInteger(Favorites.ITEM_TYPE);
if (itemType != null
&& itemType.intValue() == Favorites.ITEM_TYPE_APPWIDGET
&& !values.containsKey(Favorites.APPWIDGET_ID)) {
ComponentName cn = ComponentName.unflattenFromString(
values.getAsString(Favorites.APPWIDGET_PROVIDER));
if (cn == null) {
return 0;
}
LauncherWidgetHolder widgetHolder = LauncherWidgetHolder.newInstance(getContext());
try {
int appWidgetId = widgetHolder.allocateAppWidgetId();
values.put(LauncherSettings.Favorites.APPWIDGET_ID, appWidgetId);
if (!AppWidgetManager.getInstance(getContext())
.bindAppWidgetIdIfAllowed(appWidgetId, cn)) {
widgetHolder.deleteAppWidgetId(appWidgetId);
return 0;
}
} catch (RuntimeException e) {
Log.e(TAG, "Failed to initialize external widget", e);
return 0;
} finally {
// Necessary to destroy the holder to free up possible activity context
widgetHolder.destroy();
}
}
SqlArguments args = new SqlArguments(uri);
return controller.insert(args.table, values);
});
return rowId < 0 ? null : ContentUris.withAppendedId(uri, rowId);
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
SqlArguments args = new SqlArguments(uri, selection, selectionArgs);
return executeControllerTask(c -> c.delete(args.table, args.where, args.args));
}
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
SqlArguments args = new SqlArguments(uri, selection, selectionArgs);
return executeControllerTask(c -> c.update(args.table, values, args.where, args.args));
}
private int executeControllerTask(ToIntFunction<ModelDbController> task) {
if (Binder.getCallingPid() == Process.myPid()) {
throw new IllegalArgumentException("Same process should call model directly");
}
try {
return MODEL_EXECUTOR.submit(() -> {
LauncherModel model = LauncherAppState.getInstance(getContext()).getModel();
int count = task.applyAsInt(model.getModelDbController());
if (count > 0) {
MAIN_EXECUTOR.submit(model::forceReload);
}
return count;
}).get();
} catch (Exception e) {
throw new IllegalStateException(e);
}
}
static class SqlArguments {
public final String table;
public final String where;
public final String[] args;
SqlArguments(Uri url, String where, String[] args) {
if (url.getPathSegments().size() == 1) {
this.table = url.getPathSegments().get(0);
this.where = where;
this.args = args;
} else if (url.getPathSegments().size() != 2) {
throw new IllegalArgumentException("Invalid URI: " + url);
} else if (!TextUtils.isEmpty(where)) {
throw new UnsupportedOperationException("WHERE clause not supported: " + url);
} else {
this.table = url.getPathSegments().get(0);
this.where = "_id=" + ContentUris.parseId(url);
this.args = null;
}
}
SqlArguments(Uri url) {
if (url.getPathSegments().size() == 1) {
table = url.getPathSegments().get(0);
where = null;
args = null;
} else {
throw new IllegalArgumentException("Invalid URI: " + url);
}
}
}
}
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