Core Apps » NoteCipher

/*

 * Copyright (C) 2008 Google Inc.

 *

 * Licensed under the Apache License, Version 2.0 (the "License")savedInstanceState;

 * 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 info.guardianproject.notepadbot;

import android.app.AlertDialog;

import android.content.ContentResolver;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.content.res.Configuration;

import android.database.Cursor;

import android.net.Uri;

import android.os.Bundle;

import android.support.v4.app.LoaderManager;

import android.support.v4.content.CursorLoader;

import android.support.v4.content.Loader;

import android.support.v4.widget.SimpleCursorAdapter;

import android.util.Log;

import android.view.ContextMenu;

import android.view.ContextMenu.ContextMenuInfo;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnTouchListener;

import android.widget.AdapterView;

import android.widget.AdapterView.AdapterContextMenuInfo;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

import com.actionbarsherlock.app.SherlockFragmentActivity;

import com.actionbarsherlock.view.Menu;

import com.actionbarsherlock.view.MenuItem;

import info.guardianproject.cacheword.CacheWordActivityHandler;

import info.guardianproject.cacheword.ICacheWordSubscriber;

import net.sqlcipher.database.SQLiteDatabase;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

public class NoteCipher extends SherlockFragmentActivity implements ICacheWordSubscriber {

    private static final int ACTIVITY_CREATE = 0;

    private static final int ACTIVITY_EDIT = 1;

    private static final int INSERT_ID = Menu.FIRST;

    private static final int DELETE_ID = Menu.FIRST + 1;

    private static final int REKEY_ID = Menu.FIRST + 2;

    private static final int SHARE_ID = Menu.FIRST + 3;

    private static final int VIEW_ID = Menu.FIRST + 4;

    private static final int LOCK_ID = Menu.FIRST + 5;

    private static final int SETTINGS_ID = Menu.FIRST + 6;

    public static final String TAG = "notecipher";

    private NotesDbAdapter mDbHelper;

    private Uri dataStream;

    private final static int MAX_SIZE = 1000000;

    private CacheWordActivityHandler mCacheWord;

    private ListView notesListView;

    private SimpleCursorAdapter notesCursorAdapter;

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        if (getIntent() != null) {

            if (getIntent().hasExtra(Intent.EXTRA_STREAM)) {

                dataStream = (Uri) getIntent().getExtras().get(Intent.EXTRA_STREAM);

            } else {

                dataStream = getIntent().getData();

            }

        }

        SQLiteDatabase.loadLibs(this);

        setContentView(R.layout.notes_list);

        notesListView = (ListView) findViewById(R.id.notesListView);

        notesListView.setOnItemClickListener(new OnItemClickListener() {

                        @Override

                        public void onItemClick(AdapterView<?> ad, View v, int position,

                                        long id) {

                                Intent i = new Intent(getApplication(), NoteEdit.class);

                    i.putExtra(NotesDbAdapter.KEY_ROWID, id);

                    startActivityForResult(i, ACTIVITY_EDIT);

                        }

        });

        registerForContextMenu(notesListView);

        mCacheWord = new CacheWordActivityHandler(this, ((App)getApplication()).getCWSettings());

        // Create an array to specify the fields we want to display in the list (only TITLE)

        String[] from = new String[] { NotesDbAdapter.KEY_TITLE };

        // and an array of the fields we want to bind those fields to (in this

        // case just text1)

        int[] to = new int[] { R.id.row_text };

        // Now create an empty simple cursor adapter that later will display the notes

        notesCursorAdapter = new SimpleCursorAdapter(this, R.layout.notes_row, null, from, to

                                        , SimpleCursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);

        notesListView.setAdapter(notesCursorAdapter);

    }

    @Override

    protected void onPause() {

        super.onPause();

        mCacheWord.onPause();

    }

    @Override

    protected void onResume() {

        super.onResume();

        mCacheWord.onResume();

    }

    @Override

    public void onAttachedToWindow() {

        super.onAttachedToWindow();

        findViewById(R.id.listlayout).setOnTouchListener(new OnTouchListener() {

            @Override

            public boolean onTouch(View v, MotionEvent event) {

                if (mDbHelper != null && mDbHelper.isOpen())

                    createNote();

                return false;

            }

        });

    }

    private void closeDatabase() {

        if (mDbHelper != null) {

            mDbHelper.close();

            mDbHelper = null;

        }

    }

    private void unlockDatabase() {

        if (mCacheWord.isLocked())

            return;

        mDbHelper = new NotesDbAdapter(mCacheWord, this);

        try {

            mDbHelper.open();

            if (dataStream != null)

                importDataStream();

            else

                fillData();

        } catch (Exception e) {

            e.printStackTrace();

            Toast.makeText(this, getString(R.string.err_pass), Toast.LENGTH_LONG).show();

        }

    }

    private void fillData() {

        if (mCacheWord.isLocked())

            return;

        getSupportLoaderManager().restartLoader(VIEW_ID, null, new LoaderManager.LoaderCallbacks<Cursor>() {

                        @Override

                        public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {

                                return new NotesLoader(NoteCipher.this, mDbHelper);

                        }

                        @Override

                        public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {

                                notesCursorAdapter.swapCursor(cursor);

                        TextView emptyTV = (TextView) findViewById(R.id.emptytext);

                        if (notesCursorAdapter.isEmpty()) {

                            Toast.makeText(NoteCipher.this, R.string.on_start, Toast.LENGTH_LONG).show();

                            emptyTV.setText(R.string.no_notes);

                        } else {

                            emptyTV.setText("");

                        }

                        }

                        @Override

                        public void onLoaderReset(Loader<Cursor> loader) { }

                });

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        super.onCreateOptionsMenu(menu);

        menu.add(0, INSERT_ID, 0, R.string.menu_insert)

                .setIcon(R.drawable.new_content)

                .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);

        //menu.add(0, REKEY_ID, 0, R.string.menu_rekey)

        //        .setIcon(R.drawable.key_icon)

        //        .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);

        menu.add(0, LOCK_ID, 0, R.string.menu_lock)

                .setIcon(R.drawable.lock)

                .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);

        menu.add(0, SETTINGS_ID, 0, R.string.settings)

                .setIcon(R.drawable.settings)

                    .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);

        return true;

    }

    @Override

    public boolean onMenuItemSelected(int featureId, MenuItem item) {

        switch (item.getItemId()) {

            case INSERT_ID:

                createNote();

                return true;

            case REKEY_ID:

                return true;

            case LOCK_ID:

                if (!mCacheWord.isLocked())

                    mCacheWord.manuallyLock();

                return true;

            case SETTINGS_ID:

                    startActivity(new Intent(this, Settings.class));

                return true;

        }

        return super.onMenuItemSelected(featureId, item);

    }

    @Override

    public void onCreateContextMenu(ContextMenu menu, View v,

            ContextMenuInfo menuInfo) {

        super.onCreateContextMenu(menu, v, menuInfo);

        // menu.add(0, VIEW_ID, 0, R.string.menu_view);

        menu.add(0, SHARE_ID, 0, R.string.menu_share);

        menu.add(0, DELETE_ID, 0, R.string.menu_delete);

    }

    @Override

    public boolean onContextItemSelected(android.view.MenuItem item) {

        AdapterContextMenuInfo info;

        switch (item.getItemId()) {

            case DELETE_ID:

                info = (AdapterContextMenuInfo) item.getMenuInfo();

                mDbHelper.deleteNote(info.id);

                fillData();

                return true;

            case SHARE_ID:

                info = (AdapterContextMenuInfo) item.getMenuInfo();

                shareEntry(info.id);

                return true;

            case VIEW_ID:

                info = (AdapterContextMenuInfo) item.getMenuInfo();

                viewEntry(info.id);

                return true;

        }

        return super.onContextItemSelected(item);

    }

    private void shareEntry(final long id) {

        if (mCacheWord.isLocked())

            return;

        getSupportLoaderManager().restartLoader(SHARE_ID, null, new LoaderManager.LoaderCallbacks<Cursor>() {

                        @Override

                        public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {

                                return new NoteEdit.NoteContentLoader(NoteCipher.this, mDbHelper, id);

                        }

                        @Override

                        public void onLoadFinished(Loader<Cursor> loader, Cursor note) {

                                byte[] blob = note.getBlob(note.getColumnIndexOrThrow(NotesDbAdapter.KEY_DATA));

                        String title = note.getString(note.getColumnIndexOrThrow(NotesDbAdapter.KEY_TITLE));

                        String mimeType = note.getString(note.getColumnIndexOrThrow(NotesDbAdapter.KEY_TYPE));

                        if (mimeType == null)

                            mimeType = "text/plain";

                        if (blob != null) {

                            try {

                                NoteUtils.shareData(NoteCipher.this, title, mimeType, blob);

                            } catch (IOException e) {

                                Toast.makeText(NoteCipher.this, getString(R.string.err_export, e.getMessage()), Toast.LENGTH_LONG)

                                        .show();

                            }

                        } else {

                            String body = note.getString( note.getColumnIndexOrThrow(NotesDbAdapter.KEY_BODY) );

                            NoteUtils.shareText(NoteCipher.this, body);

                        }

                        note.close();

                        }

                        @Override

                        public void onLoaderReset(Loader<Cursor> loader) { }

                });

    }

    private void viewEntry(final long id) {

        if (mCacheWord.isLocked())

            return;

        getSupportLoaderManager().restartLoader(VIEW_ID, null, new LoaderManager.LoaderCallbacks<Cursor>() {

                        @Override

                        public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {

                                return new NoteEdit.NoteContentLoader(NoteCipher.this, mDbHelper, id);

                        }

                        @Override

                        public void onLoadFinished(Loader<Cursor> loader, Cursor note) {

                                byte[] blob = note.getBlob(note.getColumnIndexOrThrow(NotesDbAdapter.KEY_DATA));

                        String mimeType = note.getString(note.getColumnIndexOrThrow(NotesDbAdapter.KEY_TYPE));

                        if (mimeType == null)

                            mimeType = "text/plain";

                        if (blob != null) {

                            String title = note.getString(

                                    note.getColumnIndexOrThrow(NotesDbAdapter.KEY_TITLE));

                            NoteUtils.savePublicFile(NoteCipher.this, title, mimeType, blob);

                        }

                        note.close();

                        }

                        @Override

                        public void onLoaderReset(Loader<Cursor> loader) { }

                });

    }

    private void createNote() {

        if (mCacheWord.isLocked())

            return;

        Intent i = new Intent(this, NoteEdit.class);

        startActivityForResult(i, ACTIVITY_CREATE);

    }

    /*

     * Called after the return from creating a new note (non-Javadoc)

     * @see android.app.Activity#onActivityResult(int, int,

     * android.content.Intent)

     */

    @Override

    protected void onActivityResult(int requestCode, int resultCode,

            Intent intent) {

        super.onActivityResult(requestCode, resultCode, intent);

        mDbHelper = new NotesDbAdapter(mCacheWord, this);

        fillData();

    }

    @Override

    protected void onStop() {

        super.onStop();

    }

    @Override

    public void onConfigurationChanged(Configuration newConfig) {

        super.onConfigurationChanged(newConfig);

    }

    @Override

    protected void onSaveInstanceState(Bundle outState) {

        super.onSaveInstanceState(outState);

    }

    @Override

    protected void onDestroy() {

        super.onDestroy();

        closeDatabase();

        NoteUtils.cleanupTmp(this);

    }

    private void importDataStream() {

        if (mCacheWord.isLocked())

            return;

        try {

            ContentResolver cr = getContentResolver();

            InputStream is = cr.openInputStream(dataStream);

            String mimeType = cr.getType(dataStream);

            byte[] data = NoteUtils.readBytesAndClose(is);

            if (data.length > MAX_SIZE){

                Toast.makeText(this, R.string.err_size, Toast.LENGTH_LONG).show();

            } else {

                String title = dataStream.getLastPathSegment();

                String body = dataStream.getPath();

                new NotesDbAdapter(mCacheWord, this).createNote(title, body, data, mimeType);

                Toast.makeText(this, getString(R.string.on_import, title), Toast.LENGTH_LONG).show();

                // handleDelete();

                data = null;

                dataStream = null;

                title = null;

                body = null;

                System.gc();

                fillData();

            }

        } catch (FileNotFoundException e) {

            Log.e(TAG, e.getMessage(), e);

        } catch (IOException e) {

            Log.e(TAG, e.getMessage(), e);

        } catch (OutOfMemoryError e) {

            Toast.makeText(this, R.string.err_size, Toast.LENGTH_LONG).show();

        } finally {

            dataStream = null;

        }

    }

    /*

     * Call this to delete the original image, will ask the user

     */

    private void handleDelete() {

        final AlertDialog.Builder b = new AlertDialog.Builder(this);

        b.setIcon(android.R.drawable.ic_dialog_alert);

        b.setTitle(R.string.app_name);

        b.setMessage(R.string.confirm_delete);

        b.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {

            @Override

            public void onClick(DialogInterface dialog, int whichButton) {

                // User clicked OK so go ahead and delete

                ContentResolver cr = getContentResolver();

                if (cr != null)

                    cr.delete(dataStream, null, null);

                else {

                    Toast.makeText(NoteCipher.this, R.string.unable_to_delete_original, Toast.LENGTH_SHORT).show();

                }

            }

        });

        b.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {

            @Override

            public void onClick(DialogInterface dialog, int whichButton) {

            }

        });

        b.show();

    }

    void showLockScreen() {

        Intent intent = new Intent(this, LockScreenActivity.class);

        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);

        intent.putExtra("originalIntent", getIntent());

        startActivity(intent);

        finish();

    }

    void clearViewsAndLock() {

        closeDatabase();

        notesListView.setAdapter(null);

        System.gc();

        showLockScreen();

    }

    @Override

    public void onCacheWordUninitialized() {

        Log.d(TAG, "onCacheWordUninitialized");

        clearViewsAndLock();

    }

    @Override

    public void onCacheWordLocked() {

        Log.d(TAG, "onCacheWordLocked");

        clearViewsAndLock();

    }

    @Override

    public void onCacheWordOpened() {

        Log.d(TAG, "onCacheWordOpened");

        unlockDatabase();

        if (mDbHelper.isOpen()) {

            if (dataStream != null)

                importDataStream();

            else

                fillData();

        }

    }

    public static class NotesLoader extends CursorLoader {

                NotesDbAdapter db;

                public NotesLoader(Context context) {

                        super(context);

                }

                public NotesLoader(Context context, NotesDbAdapter db) {

                        super(context);

                        this.db = db;

                }

                 @Override

                 public Cursor loadInBackground() {

                         if (db == null)

                                 return null;

                         return db.fetchAllNotes();

                 }

        }

}