Examples with Journal com.android.launcher3.backup.BackupProtos.Journal used on opensource projects

Example 1 with Journal

use of com.android.launcher3.backup.BackupProtos.Journal in project Launcher3 by chislon.

the class LauncherBackupHelper method readJournal.

/**
 * Read the old journal from the input file.
 *
 * In the event of any error, just pretend we didn't have a journal,
 * in that case, do a full backup.
 *
 * @param oldState the read-0only file descriptor pointing to the old journal
 * @return a Journal protocol bugffer
 */
private Journal readJournal(ParcelFileDescriptor oldState) {
    Journal journal = new Journal();
    if (oldState == null) {
        return journal;
    }
    FileInputStream inStream = new FileInputStream(oldState.getFileDescriptor());
    try {
        int remaining = inStream.available();
        if (DEBUG)
            Log.d(TAG, "available " + remaining);
        if (remaining < MAX_JOURNAL_SIZE) {
            byte[] buffer = new byte[remaining];
            int bytesRead = 0;
            while (remaining > 0) {
                try {
                    int result = inStream.read(buffer, bytesRead, remaining);
                    if (result > 0) {
                        if (DEBUG)
                            Log.d(TAG, "read some bytes: " + result);
                        remaining -= result;
                        bytesRead += result;
                    } else {
                        // stop reading ands see what there is to parse
                        Log.w(TAG, "read error: " + result);
                        remaining = 0;
                    }
                } catch (IOException e) {
                    Log.w(TAG, "failed to read the journal", e);
                    buffer = null;
                    remaining = 0;
                }
            }
            if (DEBUG)
                Log.d(TAG, "journal bytes read: " + bytesRead);
            if (buffer != null) {
                try {
                    MessageNano.mergeFrom(journal, readCheckedBytes(buffer, 0, bytesRead));
                } catch (InvalidProtocolBufferNanoException e) {
                    Log.d(TAG, "failed to read the journal", e);
                    journal.clear();
                }
            }
        }
    } catch (IOException e) {
        Log.d(TAG, "failed to close the journal", e);
    } finally {
        try {
            inStream.close();
        } catch (IOException e) {
            Log.d(TAG, "failed to close the journal", e);
        }
    }
    return journal;
}

Example 2 with Journal

use of com.android.launcher3.backup.BackupProtos.Journal in project Launcher3 by chislon.

the class LauncherBackupHelper method backupWidgets.

/**
 * Write all the static widget resources we need to render placeholders
 * for a package that is not installed.
 *
 * @param in notes from last backup
 * @param data output stream for key/value pairs
 * @param out notes about this backup
 * @param keys keys to mark as clean in the notes for next backup
 * @throws IOException
 */
private void backupWidgets(Journal in, BackupDataOutput data, Journal out, ArrayList<Key> keys) throws IOException {
    // persist static widget info that hasn't been persisted yet
    final LauncherAppState appState = LauncherAppState.getInstanceNoCreate();
    if (appState == null) {
        // try again later
        dataChanged();
        if (DEBUG)
            Log.d(TAG, "Launcher is not initialized, delaying widget backup");
        return;
    }
    final ContentResolver cr = mContext.getContentResolver();
    final WidgetPreviewLoader previewLoader = new WidgetPreviewLoader(mContext);
    final PagedViewCellLayout widgetSpacingLayout = new PagedViewCellLayout(mContext);
    final IconCache iconCache = appState.getIconCache();
    final int dpi = mContext.getResources().getDisplayMetrics().densityDpi;
    final DeviceProfile profile = appState.getDynamicGrid().getDeviceProfile();
    if (DEBUG)
        Log.d(TAG, "cellWidthPx: " + profile.cellWidthPx);
    // read the old ID set
    Set<String> savedIds = getSavedIdsByType(Key.WIDGET, in);
    if (DEBUG)
        Log.d(TAG, "widgets savedIds.size()=" + savedIds.size());
    int startRows = out.rows;
    if (DEBUG)
        Log.d(TAG, "starting here: " + startRows);
    String where = Favorites.ITEM_TYPE + "=" + Favorites.ITEM_TYPE_APPWIDGET;
    Cursor cursor = cr.query(Favorites.CONTENT_URI, FAVORITE_PROJECTION, where, null, null);
    Set<String> currentIds = new HashSet<String>(cursor.getCount());
    try {
        cursor.moveToPosition(-1);
        while (cursor.moveToNext()) {
            final long id = cursor.getLong(ID_INDEX);
            final String providerName = cursor.getString(APPWIDGET_PROVIDER_INDEX);
            final int spanX = cursor.getInt(SPANX_INDEX);
            final int spanY = cursor.getInt(SPANY_INDEX);
            final ComponentName provider = ComponentName.unflattenFromString(providerName);
            Key key = null;
            String backupKey = null;
            if (provider != null) {
                key = getKey(Key.WIDGET, providerName);
                backupKey = keyToBackupKey(key);
                currentIds.add(backupKey);
            } else {
                Log.w(TAG, "empty intent on appwidget: " + id);
            }
            if (savedIds.contains(backupKey)) {
                if (DEBUG)
                    Log.d(TAG, "already saved widget " + backupKey);
                // remember that we already backed this up previously
                keys.add(key);
            } else if (backupKey != null) {
                if (DEBUG)
                    Log.d(TAG, "I can count this high: " + out.rows);
                if ((out.rows - startRows) < MAX_WIDGETS_PER_PASS) {
                    if (DEBUG)
                        Log.d(TAG, "saving widget " + backupKey);
                    previewLoader.setPreviewSize(spanX * profile.cellWidthPx, spanY * profile.cellHeightPx, widgetSpacingLayout);
                    byte[] blob = packWidget(dpi, previewLoader, iconCache, provider);
                    keys.add(key);
                    writeRowToBackup(key, blob, out, data);
                } else {
                    if (DEBUG)
                        Log.d(TAG, "scheduling another run for widget " + backupKey);
                    // too many widgets for this pass, request another.
                    dataChanged();
                }
            }
        }
    } finally {
        cursor.close();
    }
    if (DEBUG)
        Log.d(TAG, "widget currentIds.size()=" + currentIds.size());
    // these IDs must have been deleted
    savedIds.removeAll(currentIds);
    out.rows += removeDeletedKeysFromBackup(savedIds, data);
}

Example 3 with Journal

use of com.android.launcher3.backup.BackupProtos.Journal in project Launcher3 by chislon.

the class LauncherBackupHelper method backupScreens.

/**
 * Write all modified screens to the data stream.
 *
 * @param in notes from last backup
 * @param data output stream for key/value pairs
 * @param out notes about this backup
 * @param keys keys to mark as clean in the notes for next backup
 * @throws IOException
 */
private void backupScreens(Journal in, BackupDataOutput data, Journal out, ArrayList<Key> keys) throws IOException {
    // read the old ID set
    Set<String> savedIds = getSavedIdsByType(Key.SCREEN, in);
    if (DEBUG)
        Log.d(TAG, "screen savedIds.size()=" + savedIds.size());
    // persist things that have changed since the last backup
    ContentResolver cr = mContext.getContentResolver();
    Cursor cursor = cr.query(WorkspaceScreens.CONTENT_URI, SCREEN_PROJECTION, null, null, null);
    Set<String> currentIds = new HashSet<String>(cursor.getCount());
    try {
        cursor.moveToPosition(-1);
        while (cursor.moveToNext()) {
            final long id = cursor.getLong(ID_INDEX);
            final long updateTime = cursor.getLong(ID_MODIFIED);
            Key key = getKey(Key.SCREEN, id);
            keys.add(key);
            currentIds.add(keyToBackupKey(key));
            if (updateTime > in.t) {
                byte[] blob = packScreen(cursor);
                writeRowToBackup(key, blob, out, data);
            }
        }
    } finally {
        cursor.close();
    }
    if (DEBUG)
        Log.d(TAG, "screen currentIds.size()=" + currentIds.size());
    // these IDs must have been deleted
    savedIds.removeAll(currentIds);
    out.rows += removeDeletedKeysFromBackup(savedIds, data);
}

Example 4 with Journal

use of com.android.launcher3.backup.BackupProtos.Journal in project Launcher3 by chislon.

the class LauncherBackupHelper method backupIcons.

/**
 * Write all the static icon resources we need to render placeholders
 * for a package that is not installed.
 *
 * @param in notes from last backup
 * @param data output stream for key/value pairs
 * @param out notes about this backup
 * @param keys keys to mark as clean in the notes for next backup
 * @throws IOException
 */
private void backupIcons(Journal in, BackupDataOutput data, Journal out, ArrayList<Key> keys) throws IOException {
    // persist icons that haven't been persisted yet
    final LauncherAppState appState = LauncherAppState.getInstanceNoCreate();
    if (appState == null) {
        // try again later
        dataChanged();
        if (DEBUG)
            Log.d(TAG, "Launcher is not initialized, delaying icon backup");
        return;
    }
    final ContentResolver cr = mContext.getContentResolver();
    final IconCache iconCache = appState.getIconCache();
    final int dpi = mContext.getResources().getDisplayMetrics().densityDpi;
    // read the old ID set
    Set<String> savedIds = getSavedIdsByType(Key.ICON, in);
    if (DEBUG)
        Log.d(TAG, "icon savedIds.size()=" + savedIds.size());
    int startRows = out.rows;
    if (DEBUG)
        Log.d(TAG, "starting here: " + startRows);
    String where = Favorites.ITEM_TYPE + "=" + Favorites.ITEM_TYPE_APPLICATION;
    Cursor cursor = cr.query(Favorites.CONTENT_URI, FAVORITE_PROJECTION, where, null, null);
    Set<String> currentIds = new HashSet<String>(cursor.getCount());
    try {
        cursor.moveToPosition(-1);
        while (cursor.moveToNext()) {
            final long id = cursor.getLong(ID_INDEX);
            final String intentDescription = cursor.getString(INTENT_INDEX);
            try {
                Intent intent = Intent.parseUri(intentDescription, 0);
                ComponentName cn = intent.getComponent();
                Key key = null;
                String backupKey = null;
                if (cn != null) {
                    key = getKey(Key.ICON, cn.flattenToShortString());
                    backupKey = keyToBackupKey(key);
                    currentIds.add(backupKey);
                } else {
                    Log.w(TAG, "empty intent on application favorite: " + id);
                }
                if (savedIds.contains(backupKey)) {
                    if (DEBUG)
                        Log.d(TAG, "already saved icon " + backupKey);
                    // remember that we already backed this up previously
                    keys.add(key);
                } else if (backupKey != null) {
                    if (DEBUG)
                        Log.d(TAG, "I can count this high: " + out.rows);
                    if ((out.rows - startRows) < MAX_ICONS_PER_PASS) {
                        if (DEBUG)
                            Log.d(TAG, "saving icon " + backupKey);
                        Bitmap icon = iconCache.getIcon(intent);
                        keys.add(key);
                        if (icon != null && !iconCache.isDefaultIcon(icon)) {
                            byte[] blob = packIcon(dpi, icon);
                            writeRowToBackup(key, blob, out, data);
                        }
                    } else {
                        if (DEBUG)
                            Log.d(TAG, "scheduling another run for icon " + backupKey);
                        // too many icons for this pass, request another.
                        dataChanged();
                    }
                }
            } catch (URISyntaxException e) {
                Log.w(TAG, "invalid URI on application favorite: " + id);
            } catch (IOException e) {
                Log.w(TAG, "unable to save application icon for favorite: " + id);
            }
        }
    } finally {
        cursor.close();
    }
    if (DEBUG)
        Log.d(TAG, "icon currentIds.size()=" + currentIds.size());
    // these IDs must have been deleted
    savedIds.removeAll(currentIds);
    out.rows += removeDeletedKeysFromBackup(savedIds, data);
}

Example 5 with Journal

use of com.android.launcher3.backup.BackupProtos.Journal in project Launcher3 by chislon.

the class LauncherBackupHelper method writeNewStateDescription.

/**
 * Record the restore state for the next backup.
 *
 * @param newState notes about the backup state after restore.
 */
@Override
public void writeNewStateDescription(ParcelFileDescriptor newState) {
    // clear the output journal time, to force a full backup to
    // will catch any changes the restore process might have made
    Journal out = new Journal();
    out.t = 0;
    out.key = mKeys.toArray(BackupProtos.Key.emptyArray());
    writeJournal(newState, out);
    Log.v(TAG, "onRestore: read " + mKeys.size() + " rows");
    mKeys.clear();
}