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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.config.FeatureFlags.MULTI_DB_GRID_MIRATION_ALGO;
import static com.android.launcher3.provider.LauncherDbUtils.copyTable;
import static com.android.launcher3.provider.LauncherDbUtils.dropTable;
import static com.android.launcher3.provider.LauncherDbUtils.tableExists;
import android.annotation.TargetApi;
import android.app.backup.BackupManager;
import android.appwidget.AppWidgetHost;
import android.appwidget.AppWidgetManager;
import android.content.ComponentName;
import android.content.ContentProvider;
import android.content.ContentProviderOperation;
import android.content.ContentProviderResult;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.OperationApplicationException;
import android.content.SharedPreferences;
import android.content.pm.ProviderInfo;
import android.content.res.Resources;
import android.database.Cursor;
import android.database.DatabaseUtils;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;
import android.database.sqlite.SQLiteStatement;
import android.net.Uri;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
import android.os.Process;
import android.os.UserHandle;
import android.os.UserManager;
import android.provider.BaseColumns;
import android.provider.Settings;
import android.text.TextUtils;
import android.util.Log;
import android.util.Xml;
import com.android.launcher3.AutoInstallsLayout.LayoutParserCallback;
import com.android.launcher3.LauncherSettings.Favorites;
import com.android.launcher3.config.FeatureFlags;
import com.android.launcher3.logging.FileLog;
import com.android.launcher3.model.DbDowngradeHelper;
import com.android.launcher3.pm.UserCache;
import com.android.launcher3.provider.LauncherDbUtils;
import com.android.launcher3.provider.LauncherDbUtils.SQLiteTransaction;
import com.android.launcher3.provider.RestoreDbTask;
import com.android.launcher3.util.IOUtils;
import com.android.launcher3.util.IntArray;
import com.android.launcher3.util.IntSet;
import com.android.launcher3.util.NoLocaleSQLiteHelper;
import com.android.launcher3.util.PackageManagerHelper;
import com.android.launcher3.util.Thunk;
import org.xmlpull.v1.XmlPullParser;
import java.io.File;
import java.io.FileDescriptor;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringReader;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Locale;
import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;
public class LauncherProvider extends ContentProvider {
private static final String TAG = "LauncherProvider";
private static final boolean LOGD = false;
private static final String DOWNGRADE_SCHEMA_FILE = "downgrade_schema.json";
private static final long RESTORE_BACKUP_TABLE_DELAY = TimeUnit.SECONDS.toMillis(30);
/**
* Represents the schema of the database. Changes in scheme need not be backwards compatible.
* When increasing the scheme version, ensure that downgrade_schema.json is updated
*/
public static final int SCHEMA_VERSION = 28;
public static final String AUTHORITY = BuildConfig.APPLICATION_ID + ".settings";
static final String EMPTY_DATABASE_CREATED = "EMPTY_DATABASE_CREATED";
protected DatabaseHelper mOpenHelper;
private long mLastRestoreTimestamp = 0L;
/**
* $ 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() {
if (FeatureFlags.IS_STUDIO_BUILD) {
Log.d(TAG, "Launcher process started");
}
// The content provider exists for the entire duration of the launcher main process and
// is the first component to get created.
MainProcessInitializer.initialize(getContext().getApplicationContext());
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;
}
}
/**
* Overridden in tests
*/
protected synchronized void createDbIfNotExists() {
if (mOpenHelper == null) {
mOpenHelper = DatabaseHelper.createDatabaseHelper(
getContext(), false /* forMigration */);
if (RestoreDbTask.isPending(getContext())) {
if (!RestoreDbTask.performRestore(getContext(), mOpenHelper,
new BackupManager(getContext()))) {
mOpenHelper.createEmptyDB(mOpenHelper.getWritableDatabase());
}
// Set is pending to false irrespective of the result, so that it doesn't get
// executed again.
RestoreDbTask.setPending(getContext(), false);
}
}
}
private synchronized boolean prepForMigration(String dbFile, String targetTableName,
Supplier<DatabaseHelper> src, Supplier<DatabaseHelper> dst) {
if (TextUtils.equals(dbFile, mOpenHelper.getDatabaseName())) {
return false;
}
final DatabaseHelper helper = src.get();
mOpenHelper = dst.get();
copyTable(helper.getReadableDatabase(), Favorites.TABLE_NAME,
mOpenHelper.getWritableDatabase(), targetTableName, getContext());
helper.close();
return true;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
createDbIfNotExists();
SqlArguments args = new SqlArguments(uri, selection, selectionArgs);
SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
qb.setTables(args.table);
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
Cursor result = qb.query(db, projection, args.where, args.args, null, null, sortOrder);
result.setNotificationUri(getContext().getContentResolver(), uri);
return result;
}
@Thunk static int dbInsertAndCheck(DatabaseHelper helper,
SQLiteDatabase db, String table, String nullColumnHack, ContentValues values) {
if (values == null) {
throw new RuntimeException("Error: attempting to insert null values");
}
if (!values.containsKey(LauncherSettings.Favorites._ID)) {
throw new RuntimeException("Error: attempting to add item without specifying an id");
}
helper.checkId(values);
return (int) db.insert(table, nullColumnHack, values);
}
private void reloadLauncherIfExternal() {
if (Binder.getCallingPid() != Process.myPid()) {
LauncherAppState app = LauncherAppState.getInstanceNoCreate();
if (app != null) {
app.getModel().forceReload();
}
}
}
@Override
public Uri insert(Uri uri, ContentValues initialValues) {
createDbIfNotExists();
SqlArguments args = new SqlArguments(uri);
// In very limited cases, we support system|signature permission apps to modify the db.
if (Binder.getCallingPid() != Process.myPid()) {
if (!initializeExternalAdd(initialValues)) {
return null;
}
}
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
addModifiedTime(initialValues);
final int rowId = dbInsertAndCheck(mOpenHelper, db, args.table, null, initialValues);
if (rowId < 0) return null;
onAddOrDeleteOp(db);
uri = ContentUris.withAppendedId(uri, rowId);
reloadLauncherIfExternal();
return uri;
}
private boolean initializeExternalAdd(ContentValues values) {
// 1. Ensure that externally added items have a valid item id
int id = mOpenHelper.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(LauncherSettings.Favorites.ITEM_TYPE);
if (itemType != null &&
itemType.intValue() == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET &&
!values.containsKey(LauncherSettings.Favorites.APPWIDGET_ID)) {
final AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(getContext());
ComponentName cn = ComponentName.unflattenFromString(
values.getAsString(Favorites.APPWIDGET_PROVIDER));
if (cn != null) {
try {
AppWidgetHost widgetHost = mOpenHelper.newLauncherWidgetHost();
int appWidgetId = widgetHost.allocateAppWidgetId();
values.put(LauncherSettings.Favorites.APPWIDGET_ID, appWidgetId);
if (!appWidgetManager.bindAppWidgetIdIfAllowed(appWidgetId,cn)) {
widgetHost.deleteAppWidgetId(appWidgetId);
return false;
}
} catch (RuntimeException e) {
Log.e(TAG, "Failed to initialize external widget", e);
return false;
}
} else {
return false;
}
}
return true;
}
@Override
public int bulkInsert(Uri uri, ContentValues[] values) {
createDbIfNotExists();
SqlArguments args = new SqlArguments(uri);
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
try (SQLiteTransaction t = new SQLiteTransaction(db)) {
int numValues = values.length;
for (int i = 0; i < numValues; i++) {
addModifiedTime(values[i]);
if (dbInsertAndCheck(mOpenHelper, db, args.table, null, values[i]) < 0) {
return 0;
}
}
onAddOrDeleteOp(db);
t.commit();
}
reloadLauncherIfExternal();
return values.length;
}
@TargetApi(Build.VERSION_CODES.M)
@Override
public ContentProviderResult[] applyBatch(ArrayList<ContentProviderOperation> operations)
throws OperationApplicationException {
createDbIfNotExists();
try (SQLiteTransaction t = new SQLiteTransaction(mOpenHelper.getWritableDatabase())) {
boolean isAddOrDelete = false;
final int numOperations = operations.size();
final ContentProviderResult[] results = new ContentProviderResult[numOperations];
for (int i = 0; i < numOperations; i++) {
ContentProviderOperation op = operations.get(i);
results[i] = op.apply(this, results, i);
isAddOrDelete |= (op.isInsert() || op.isDelete()) &&
results[i].count != null && results[i].count > 0;
}
if (isAddOrDelete) {
onAddOrDeleteOp(t.getDb());
}
t.commit();
reloadLauncherIfExternal();
return results;
}
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
createDbIfNotExists();
SqlArguments args = new SqlArguments(uri, selection, selectionArgs);
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
if (Binder.getCallingPid() != Process.myPid()
&& Favorites.TABLE_NAME.equalsIgnoreCase(args.table)) {
mOpenHelper.removeGhostWidgets(mOpenHelper.getWritableDatabase());
}
int count = db.delete(args.table, args.where, args.args);
if (count > 0) {
onAddOrDeleteOp(db);
reloadLauncherIfExternal();
}
return count;
}
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
createDbIfNotExists();
SqlArguments args = new SqlArguments(uri, selection, selectionArgs);
addModifiedTime(values);
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
int count = db.update(args.table, values, args.where, args.args);
reloadLauncherIfExternal();
return count;
}
@Override
public Bundle call(String method, final String arg, final Bundle extras) {
if (Binder.getCallingUid() != Process.myUid()) {
return null;
}
createDbIfNotExists();
switch (method) {
case LauncherSettings.Settings.METHOD_CLEAR_EMPTY_DB_FLAG: {
clearFlagEmptyDbCreated();
return null;
}
case LauncherSettings.Settings.METHOD_WAS_EMPTY_DB_CREATED : {
Bundle result = new Bundle();
result.putBoolean(LauncherSettings.Settings.EXTRA_VALUE,
Utilities.getPrefs(getContext()).getBoolean(EMPTY_DATABASE_CREATED, false));
return result;
}
case LauncherSettings.Settings.METHOD_DELETE_EMPTY_FOLDERS: {
Bundle result = new Bundle();
result.putIntArray(LauncherSettings.Settings.EXTRA_VALUE, deleteEmptyFolders()
.toArray());
return result;
}
case LauncherSettings.Settings.METHOD_NEW_ITEM_ID: {
Bundle result = new Bundle();
result.putInt(LauncherSettings.Settings.EXTRA_VALUE,
mOpenHelper.generateNewItemId());
return result;
}
case LauncherSettings.Settings.METHOD_NEW_SCREEN_ID: {
Bundle result = new Bundle();
result.putInt(LauncherSettings.Settings.EXTRA_VALUE,
mOpenHelper.generateNewScreenId());
return result;
}
case LauncherSettings.Settings.METHOD_CREATE_EMPTY_DB: {
mOpenHelper.createEmptyDB(mOpenHelper.getWritableDatabase());
return null;
}
case LauncherSettings.Settings.METHOD_LOAD_DEFAULT_FAVORITES: {
loadDefaultFavoritesIfNecessary();
return null;
}
case LauncherSettings.Settings.METHOD_REMOVE_GHOST_WIDGETS: {
mOpenHelper.removeGhostWidgets(mOpenHelper.getWritableDatabase());
return null;
}
case LauncherSettings.Settings.METHOD_NEW_TRANSACTION: {
Bundle result = new Bundle();
result.putBinder(LauncherSettings.Settings.EXTRA_VALUE,
new SQLiteTransaction(mOpenHelper.getWritableDatabase()));
return result;
}
case LauncherSettings.Settings.METHOD_REFRESH_BACKUP_TABLE: {
mOpenHelper.mBackupTableExists = tableExists(mOpenHelper.getReadableDatabase(),
Favorites.BACKUP_TABLE_NAME);
return null;
}
case LauncherSettings.Settings.METHOD_REFRESH_HOTSEAT_RESTORE_TABLE: {
mOpenHelper.mHotseatRestoreTableExists = tableExists(
mOpenHelper.getReadableDatabase(), Favorites.HYBRID_HOTSEAT_BACKUP_TABLE);
return null;
}
case LauncherSettings.Settings.METHOD_RESTORE_BACKUP_TABLE: {
final long ts = System.currentTimeMillis();
if (ts - mLastRestoreTimestamp > RESTORE_BACKUP_TABLE_DELAY) {
mLastRestoreTimestamp = ts;
RestoreDbTask.restoreIfPossible(
getContext(), mOpenHelper, new BackupManager(getContext()));
}
return null;
}
case LauncherSettings.Settings.METHOD_UPDATE_CURRENT_OPEN_HELPER: {
if (MULTI_DB_GRID_MIRATION_ALGO.get()) {
Bundle result = new Bundle();
result.putBoolean(LauncherSettings.Settings.EXTRA_VALUE,
prepForMigration(
InvariantDeviceProfile.INSTANCE.get(getContext()).dbFile,
Favorites.TMP_TABLE,
() -> mOpenHelper,
() -> DatabaseHelper.createDatabaseHelper(
getContext(), true /* forMigration */)));
return result;
}
}
case LauncherSettings.Settings.METHOD_PREP_FOR_PREVIEW: {
if (MULTI_DB_GRID_MIRATION_ALGO.get()) {
Bundle result = new Bundle();
result.putBoolean(LauncherSettings.Settings.EXTRA_VALUE,
prepForMigration(
arg /* dbFile */,
Favorites.PREVIEW_TABLE_NAME,
() -> DatabaseHelper.createDatabaseHelper(
getContext(), arg, true /* forMigration */),
() -> mOpenHelper));
return result;
}
}
}
return null;
}
private void onAddOrDeleteOp(SQLiteDatabase db) {
mOpenHelper.onAddOrDeleteOp(db);
}
/**
* Deletes any empty folder from the DB.
* @return Ids of deleted folders.
*/
private IntArray deleteEmptyFolders() {
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
try (SQLiteTransaction t = new SQLiteTransaction(db)) {
// Select folders whose id do not match any container value.
String selection = LauncherSettings.Favorites.ITEM_TYPE + " = "
+ LauncherSettings.Favorites.ITEM_TYPE_FOLDER + " AND "
+ LauncherSettings.Favorites._ID + " NOT IN (SELECT " +
LauncherSettings.Favorites.CONTAINER + " FROM "
+ Favorites.TABLE_NAME + ")";
IntArray folderIds = LauncherDbUtils.queryIntArray(db, Favorites.TABLE_NAME,
Favorites._ID, selection, null, null);
if (!folderIds.isEmpty()) {
db.delete(Favorites.TABLE_NAME, Utilities.createDbSelectionQuery(
LauncherSettings.Favorites._ID, folderIds), null);
}
t.commit();
return folderIds;
} catch (SQLException ex) {
Log.e(TAG, ex.getMessage(), ex);
return new IntArray();
}
}
@Thunk static void addModifiedTime(ContentValues values) {
values.put(LauncherSettings.Favorites.MODIFIED, System.currentTimeMillis());
}
private void clearFlagEmptyDbCreated() {
Utilities.getPrefs(getContext()).edit().remove(EMPTY_DATABASE_CREATED).commit();
}
/**
* Loads the default workspace based on the following priority scheme:
* 1) From the app restrictions
* 2) From a package provided by play store
* 3) From a partner configuration APK, already in the system image
* 4) The default configuration for the particular device
*/
synchronized private void loadDefaultFavoritesIfNecessary() {
SharedPreferences sp = Utilities.getPrefs(getContext());
if (sp.getBoolean(EMPTY_DATABASE_CREATED, false)) {
Log.d(TAG, "loading default workspace");
AppWidgetHost widgetHost = mOpenHelper.newLauncherWidgetHost();
AutoInstallsLayout loader = createWorkspaceLoaderFromAppRestriction(widgetHost);
if (loader == null) {
loader = AutoInstallsLayout.get(getContext(),widgetHost, mOpenHelper);
}
if (loader == null) {
final Partner partner = Partner.get(getContext().getPackageManager());
if (partner != null && partner.hasDefaultLayout()) {
final Resources partnerRes = partner.getResources();
int workspaceResId = partnerRes.getIdentifier(Partner.RES_DEFAULT_LAYOUT,
"xml", partner.getPackageName());
if (workspaceResId != 0) {
loader = new DefaultLayoutParser(getContext(), widgetHost,
mOpenHelper, partnerRes, workspaceResId);
}
}
}
final boolean usingExternallyProvidedLayout = loader != null;
if (loader == null) {
loader = getDefaultLayoutParser(widgetHost);
}
// There might be some partially restored DB items, due to buggy restore logic in
// previous versions of launcher.
mOpenHelper.createEmptyDB(mOpenHelper.getWritableDatabase());
// Populate favorites table with initial favorites
if ((mOpenHelper.loadFavorites(mOpenHelper.getWritableDatabase(), loader) <= 0)
&& usingExternallyProvidedLayout) {
// Unable to load external layout. Cleanup and load the internal layout.
mOpenHelper.createEmptyDB(mOpenHelper.getWritableDatabase());
mOpenHelper.loadFavorites(mOpenHelper.getWritableDatabase(),
getDefaultLayoutParser(widgetHost));
}
clearFlagEmptyDbCreated();
}
}
/**
* Creates workspace loader from an XML resource listed in the app restrictions.
*
* @return the loader if the restrictions are set and the resource exists; null otherwise.
*/
private AutoInstallsLayout createWorkspaceLoaderFromAppRestriction(AppWidgetHost widgetHost) {
Context ctx = getContext();
String authority = Settings.Secure.getString(ctx.getContentResolver(),
"launcher3.layout.provider");
if (TextUtils.isEmpty(authority)) {
return null;
}
ProviderInfo pi = ctx.getPackageManager().resolveContentProvider(authority, 0);
if (pi == null) {
Log.e(TAG, "No provider found for authority " + authority);
return null;
}
Uri uri = getLayoutUri(authority, ctx);
try (InputStream in = ctx.getContentResolver().openInputStream(uri)) {
// Read the full xml so that we fail early in case of any IO error.
String layout = new String(IOUtils.toByteArray(in));
XmlPullParser parser = Xml.newPullParser();
parser.setInput(new StringReader(layout));
Log.d(TAG, "Loading layout from " + authority);
return new AutoInstallsLayout(ctx, widgetHost, mOpenHelper,
ctx.getPackageManager().getResourcesForApplication(pi.applicationInfo),
() -> parser, AutoInstallsLayout.TAG_WORKSPACE);
} catch (Exception e) {
Log.e(TAG, "Error getting layout stream from: " + authority , e);
return null;
}
}
public static Uri getLayoutUri(String authority, Context ctx) {
InvariantDeviceProfile grid = LauncherAppState.getIDP(ctx);
return new Uri.Builder().scheme("content").authority(authority).path("launcher_layout")
.appendQueryParameter("version", "1")
.appendQueryParameter("gridWidth", Integer.toString(grid.numColumns))
.appendQueryParameter("gridHeight", Integer.toString(grid.numRows))
.appendQueryParameter("hotseatSize", Integer.toString(grid.numHotseatIcons))
.build();
}
private DefaultLayoutParser getDefaultLayoutParser(AppWidgetHost widgetHost) {
InvariantDeviceProfile idp = LauncherAppState.getIDP(getContext());
int defaultLayout = idp.defaultLayoutId;
if (getContext().getSystemService(UserManager.class).isDemoUser()
&& idp.demoModeLayoutId != 0) {
defaultLayout = idp.demoModeLayoutId;
}
return new DefaultLayoutParser(getContext(), widgetHost,
mOpenHelper, getContext().getResources(), defaultLayout);
}
/**
* The class is subclassed in tests to create an in-memory db.
*/
public static class DatabaseHelper extends NoLocaleSQLiteHelper implements
LayoutParserCallback {
private final Context mContext;
private final boolean mForMigration;
private int mMaxItemId = -1;
private int mMaxScreenId = -1;
private boolean mBackupTableExists;
private boolean mHotseatRestoreTableExists;
static DatabaseHelper createDatabaseHelper(Context context, boolean forMigration) {
return createDatabaseHelper(context, null, forMigration);
}
static DatabaseHelper createDatabaseHelper(Context context, String dbName,
boolean forMigration) {
if (dbName == null) {
dbName = MULTI_DB_GRID_MIRATION_ALGO.get() ? InvariantDeviceProfile.INSTANCE.get(
context).dbFile : LauncherFiles.LAUNCHER_DB;
}
DatabaseHelper databaseHelper = new DatabaseHelper(context, dbName, forMigration);
// Table creation sometimes fails silently, which leads to a crash loop.
// This way, we will try to create a table every time after crash, so the device
// would eventually be able to recover.
if (!tableExists(databaseHelper.getReadableDatabase(), Favorites.TABLE_NAME)) {
Log.e(TAG, "Tables are missing after onCreate has been called. Trying to recreate");
// This operation is a no-op if the table already exists.
databaseHelper.addFavoritesTable(databaseHelper.getWritableDatabase(), true);
}
if (!MULTI_DB_GRID_MIRATION_ALGO.get()) {
databaseHelper.mBackupTableExists = tableExists(
databaseHelper.getReadableDatabase(), Favorites.BACKUP_TABLE_NAME);
}
databaseHelper.mHotseatRestoreTableExists = tableExists(
databaseHelper.getReadableDatabase(), Favorites.HYBRID_HOTSEAT_BACKUP_TABLE);
databaseHelper.initIds();
return databaseHelper;
}
/**
* Constructor used in tests and for restore.
*/
public DatabaseHelper(Context context, String dbName, boolean forMigration) {
super(context, dbName, SCHEMA_VERSION);
mContext = context;
mForMigration = forMigration;
}
protected void initIds() {
// In the case where neither onCreate nor onUpgrade gets called, we read the maxId from
// the DB here
if (mMaxItemId == -1) {
mMaxItemId = initializeMaxItemId(getWritableDatabase());
}
if (mMaxScreenId == -1) {
mMaxScreenId = initializeMaxScreenId(getWritableDatabase());
}
}
@Override
public void onCreate(SQLiteDatabase db) {
if (LOGD) Log.d(TAG, "creating new launcher database");
mMaxItemId = 1;
mMaxScreenId = 0;
addFavoritesTable(db, false);
// Fresh and clean launcher DB.
mMaxItemId = initializeMaxItemId(db);
if (!mForMigration) {
onEmptyDbCreated();
}
}
protected void onAddOrDeleteOp(SQLiteDatabase db) {
if (mBackupTableExists) {
dropTable(db, Favorites.BACKUP_TABLE_NAME);
mBackupTableExists = false;
}
if (mHotseatRestoreTableExists) {
dropTable(db, Favorites.HYBRID_HOTSEAT_BACKUP_TABLE);
mHotseatRestoreTableExists = false;
}
}
/**
* Overriden in tests.
*/
protected void onEmptyDbCreated() {
// Set the flag for empty DB
Utilities.getPrefs(mContext).edit().putBoolean(EMPTY_DATABASE_CREATED, true).commit();
}
public long getSerialNumberForUser(UserHandle user) {
return UserCache.INSTANCE.get(mContext).getSerialNumberForUser(user);
}
public long getDefaultUserSerial() {
return getSerialNumberForUser(Process.myUserHandle());
}
private void addFavoritesTable(SQLiteDatabase db, boolean optional) {
Favorites.addTableToDb(db, getDefaultUserSerial(), optional);
}
@Override
public void onOpen(SQLiteDatabase db) {
super.onOpen(db);
File schemaFile = mContext.getFileStreamPath(DOWNGRADE_SCHEMA_FILE);
if (!schemaFile.exists()) {
handleOneTimeDataUpgrade(db);
}
DbDowngradeHelper.updateSchemaFile(schemaFile, SCHEMA_VERSION, mContext);
}
/**
* One-time data updated before support of onDowngrade was added. This update is backwards
* compatible and can safely be run multiple times.
* Note: No new logic should be added here after release, as the new logic might not get
* executed on an existing device.
* TODO: Move this to db upgrade path, once the downgrade path is released.
*/
protected void handleOneTimeDataUpgrade(SQLiteDatabase db) {
// Remove "profile extra"
UserCache um = UserCache.INSTANCE.get(mContext);
for (UserHandle user : um.getUserProfiles()) {
long serial = um.getSerialNumberForUser(user);
String sql = "update favorites set intent = replace(intent, "
+ "';l.profile=" + serial + ";', ';') where itemType = 0;";
db.execSQL(sql);
}
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
if (LOGD) Log.d(TAG, "onUpgrade triggered: " + oldVersion);
switch (oldVersion) {
// The version cannot be lower that 12, as Launcher3 never supported a lower
// version of the DB.
case 12:
// No-op
case 13: {
try (SQLiteTransaction t = new SQLiteTransaction(db)) {
// Insert new column for holding widget provider name
db.execSQL("ALTER TABLE favorites " +
"ADD COLUMN appWidgetProvider TEXT;");
t.commit();
} catch (SQLException ex) {
Log.e(TAG, ex.getMessage(), ex);
// Old version remains, which means we wipe old data
break;
}
}
case 14: {
if (!addIntegerColumn(db, Favorites.MODIFIED, 0)) {
// Old version remains, which means we wipe old data
break;
}
}
case 15: {
if (!addIntegerColumn(db, Favorites.RESTORED, 0)) {
// Old version remains, which means we wipe old data
break;
}
}
case 16:
// No-op
case 17:
// No-op
case 18:
// No-op
case 19: {
// Add userId column
if (!addIntegerColumn(db, Favorites.PROFILE_ID, getDefaultUserSerial())) {
// Old version remains, which means we wipe old data
break;
}
}
case 20:
if (!updateFolderItemsRank(db, true)) {
break;
}
case 21:
// No-op
case 22: {
if (!addIntegerColumn(db, Favorites.OPTIONS, 0)) {
// Old version remains, which means we wipe old data
break;
}
}
case 23:
// No-op
case 24:
// No-op
case 25:
convertShortcutsToLauncherActivities(db);
case 26:
// QSB was moved to the grid. Clear the first row on screen 0.
if (FeatureFlags.QSB_ON_FIRST_SCREEN &&
!LauncherDbUtils.prepareScreenZeroToHostQsb(mContext, db)) {
break;
}
case 27: {
// Update the favorites table so that the screen ids are ordered based on
// workspace page rank.
IntArray finalScreens = LauncherDbUtils.queryIntArray(db, "workspaceScreens",
BaseColumns._ID, null, null, "screenRank");
int[] original = finalScreens.toArray();
Arrays.sort(original);
String updatemap = "";
for (int i = 0; i < original.length; i++) {
if (finalScreens.get(i) != original[i]) {
updatemap += String.format(Locale.ENGLISH, " WHEN %1$s=%2$d THEN %3$d",
Favorites.SCREEN, finalScreens.get(i), original[i]);
}
}
if (!TextUtils.isEmpty(updatemap)) {
String query = String.format(Locale.ENGLISH,
"UPDATE %1$s SET %2$s=CASE %3$s ELSE %2$s END WHERE %4$s = %5$d",
Favorites.TABLE_NAME, Favorites.SCREEN, updatemap,
Favorites.CONTAINER, Favorites.CONTAINER_DESKTOP);
db.execSQL(query);
}
dropTable(db, "workspaceScreens");
}
case 28:
// DB Upgraded successfully
return;
}
// DB was not upgraded
Log.w(TAG, "Destroying all old data.");
createEmptyDB(db);
}
@Override
public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
try {
DbDowngradeHelper.parse(mContext.getFileStreamPath(DOWNGRADE_SCHEMA_FILE))
.onDowngrade(db, oldVersion, newVersion);
} catch (Exception e) {
Log.d(TAG, "Unable to downgrade from: " + oldVersion + " to " + newVersion +
". Wiping databse.", e);
createEmptyDB(db);
}
}
/**
* Clears all the data for a fresh start.
*/
public void createEmptyDB(SQLiteDatabase db) {
try (SQLiteTransaction t = new SQLiteTransaction(db)) {
dropTable(db, Favorites.TABLE_NAME);
dropTable(db, "workspaceScreens");
onCreate(db);
t.commit();
}
}
/**
* Removes widgets which are registered to the Launcher's host, but are not present
* in our model.
*/
@TargetApi(Build.VERSION_CODES.O)
public void removeGhostWidgets(SQLiteDatabase db) {
// Get all existing widget ids.
final AppWidgetHost host = newLauncherWidgetHost();
final int[] allWidgets;
try {
// Although the method was defined in O, it has existed since the beginning of time,
// so it might work on older platforms as well.
allWidgets = host.getAppWidgetIds();
} catch (IncompatibleClassChangeError e) {
Log.e(TAG, "getAppWidgetIds not supported", e);
return;
}
final IntSet validWidgets = IntSet.wrap(LauncherDbUtils.queryIntArray(db,
Favorites.TABLE_NAME, Favorites.APPWIDGET_ID,
"itemType=" + Favorites.ITEM_TYPE_APPWIDGET, null, null));
for (int widgetId : allWidgets) {
if (!validWidgets.contains(widgetId)) {
try {
FileLog.d(TAG, "Deleting invalid widget " + widgetId);
host.deleteAppWidgetId(widgetId);
} catch (RuntimeException e) {
// Ignore
}
}
}
}
/**
* Replaces all shortcuts of type {@link Favorites#ITEM_TYPE_SHORTCUT} which have a valid
* launcher activity target with {@link Favorites#ITEM_TYPE_APPLICATION}.
*/
@Thunk void convertShortcutsToLauncherActivities(SQLiteDatabase db) {
try (SQLiteTransaction t = new SQLiteTransaction(db);
// Only consider the primary user as other users can't have a shortcut.
Cursor c = db.query(Favorites.TABLE_NAME,
new String[] { Favorites._ID, Favorites.INTENT},
"itemType=" + Favorites.ITEM_TYPE_SHORTCUT +
" AND profileId=" + getDefaultUserSerial(),
null, null, null, null);
SQLiteStatement updateStmt = db.compileStatement("UPDATE favorites SET itemType="
+ Favorites.ITEM_TYPE_APPLICATION + " WHERE _id=?")
) {
final int idIndex = c.getColumnIndexOrThrow(Favorites._ID);
final int intentIndex = c.getColumnIndexOrThrow(Favorites.INTENT);
while (c.moveToNext()) {
String intentDescription = c.getString(intentIndex);
Intent intent;
try {
intent = Intent.parseUri(intentDescription, 0);
} catch (URISyntaxException e) {
Log.e(TAG, "Unable to parse intent", e);
continue;
}
if (!PackageManagerHelper.isLauncherAppTarget(intent)) {
continue;
}
int id = c.getInt(idIndex);
updateStmt.bindLong(1, id);
updateStmt.executeUpdateDelete();
}
t.commit();
} catch (SQLException ex) {
Log.w(TAG, "Error deduping shortcuts", ex);
}
}
@Thunk boolean updateFolderItemsRank(SQLiteDatabase db, boolean addRankColumn) {
try (SQLiteTransaction t = new SQLiteTransaction(db)) {
if (addRankColumn) {
// Insert new column for holding rank
db.execSQL("ALTER TABLE favorites ADD COLUMN rank INTEGER NOT NULL DEFAULT 0;");
}
// Get a map for folder ID to folder width
Cursor c = db.rawQuery("SELECT container, MAX(cellX) FROM favorites"
+ " WHERE container IN (SELECT _id FROM favorites WHERE itemType = ?)"
+ " GROUP BY container;",
new String[] {Integer.toString(LauncherSettings.Favorites.ITEM_TYPE_FOLDER)});
while (c.moveToNext()) {
db.execSQL("UPDATE favorites SET rank=cellX+(cellY*?) WHERE "
+ "container=? AND cellX IS NOT NULL AND cellY IS NOT NULL;",
new Object[] {c.getLong(1) + 1, c.getLong(0)});
}
c.close();
t.commit();
} catch (SQLException ex) {
// Old version remains, which means we wipe old data
Log.e(TAG, ex.getMessage(), ex);
return false;
}
return true;
}
private boolean addIntegerColumn(SQLiteDatabase db, String columnName, long defaultValue) {
try (SQLiteTransaction t = new SQLiteTransaction(db)) {
db.execSQL("ALTER TABLE favorites ADD COLUMN "
+ columnName + " INTEGER NOT NULL DEFAULT " + defaultValue + ";");
t.commit();
} catch (SQLException ex) {
Log.e(TAG, ex.getMessage(), ex);
return false;
}
return true;
}
// Generates a new ID to use for an object in your database. This method should be only
// called from the main UI thread. As an exception, we do call it when we call the
// constructor from the worker thread; however, this doesn't extend until after the
// constructor is called, and we only pass a reference to LauncherProvider to LauncherApp
// after that point
@Override
public int generateNewItemId() {
if (mMaxItemId < 0) {
throw new RuntimeException("Error: max item id was not initialized");
}
mMaxItemId += 1;
return mMaxItemId;
}
public AppWidgetHost newLauncherWidgetHost() {
return new LauncherAppWidgetHost(mContext);
}
@Override
public int insertAndCheck(SQLiteDatabase db, ContentValues values) {
return dbInsertAndCheck(this, db, Favorites.TABLE_NAME, null, values);
}
public void checkId(ContentValues values) {
int id = values.getAsInteger(Favorites._ID);
mMaxItemId = Math.max(id, mMaxItemId);
Integer screen = values.getAsInteger(Favorites.SCREEN);
Integer container = values.getAsInteger(Favorites.CONTAINER);
if (screen != null && container != null
&& container.intValue() == Favorites.CONTAINER_DESKTOP) {
mMaxScreenId = Math.max(screen, mMaxScreenId);
}
}
private int initializeMaxItemId(SQLiteDatabase db) {
return getMaxId(db, "SELECT MAX(%1$s) FROM %2$s", Favorites._ID, Favorites.TABLE_NAME);
}
// Generates a new ID to use for an workspace screen in your database. This method
// should be only called from the main UI thread. As an exception, we do call it when we
// call the constructor from the worker thread; however, this doesn't extend until after the
// constructor is called, and we only pass a reference to LauncherProvider to LauncherApp
// after that point
public int generateNewScreenId() {
if (mMaxScreenId < 0) {
throw new RuntimeException("Error: max screen id was not initialized");
}
mMaxScreenId += 1;
return mMaxScreenId;
}
private int initializeMaxScreenId(SQLiteDatabase db) {
return getMaxId(db, "SELECT MAX(%1$s) FROM %2$s WHERE %3$s = %4$d",
Favorites.SCREEN, Favorites.TABLE_NAME, Favorites.CONTAINER,
Favorites.CONTAINER_DESKTOP);
}
@Thunk int loadFavorites(SQLiteDatabase db, AutoInstallsLayout loader) {
// TODO: Use multiple loaders with fall-back and transaction.
int count = loader.loadLayout(db, new IntArray());
// Ensure that the max ids are initialized
mMaxItemId = initializeMaxItemId(db);
mMaxScreenId = initializeMaxScreenId(db);
return count;
}
}
/**
* @return the max _id in the provided table.
*/
@Thunk static int getMaxId(SQLiteDatabase db, String query, Object... args) {
int max = (int) DatabaseUtils.longForQuery(db,
String.format(Locale.ENGLISH, query, args),
null);
if (max < 0) {
throw new RuntimeException("Error: could not query max id");
}
return max;
}
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);
}
}
}
}