path: root/src/com/cyanogenmod/filemanager/activities/NavigationActivity.java

/*
 * Copyright (C) 2012 The CyanogenMod 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.cyanogenmod.filemanager.activities;

import android.app.ActionBar;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.SearchManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.res.Configuration;
import android.net.Uri;
import android.nfc.NfcAdapter;
import android.nfc.NfcEvent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Parcelable;
import android.os.storage.StorageVolume;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListPopupWindow;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast;

import com.cyanogenmod.filemanager.FileManagerApplication;
import com.cyanogenmod.filemanager.R;
import com.cyanogenmod.filemanager.activities.preferences.SettingsPreferences;
import com.cyanogenmod.filemanager.adapters.HighlightedSimpleMenuListAdapter;
import com.cyanogenmod.filemanager.adapters.MenuSettingsAdapter;
import com.cyanogenmod.filemanager.adapters.SimpleMenuListAdapter;
import com.cyanogenmod.filemanager.console.Console;
import com.cyanogenmod.filemanager.console.ConsoleAllocException;
import com.cyanogenmod.filemanager.console.ConsoleBuilder;
import com.cyanogenmod.filemanager.console.InsufficientPermissionsException;
import com.cyanogenmod.filemanager.console.NoSuchFileOrDirectory;
import com.cyanogenmod.filemanager.listeners.OnHistoryListener;
import com.cyanogenmod.filemanager.listeners.OnRequestRefreshListener;
import com.cyanogenmod.filemanager.model.DiskUsage;
import com.cyanogenmod.filemanager.model.FileSystemObject;
import com.cyanogenmod.filemanager.model.History;
import com.cyanogenmod.filemanager.model.MountPoint;
import com.cyanogenmod.filemanager.parcelables.HistoryNavigable;
import com.cyanogenmod.filemanager.parcelables.NavigationViewInfoParcelable;
import com.cyanogenmod.filemanager.parcelables.SearchInfoParcelable;
import com.cyanogenmod.filemanager.preferences.AccessMode;
import com.cyanogenmod.filemanager.preferences.FileManagerSettings;
import com.cyanogenmod.filemanager.preferences.NavigationLayoutMode;
import com.cyanogenmod.filemanager.preferences.ObjectIdentifier;
import com.cyanogenmod.filemanager.preferences.Preferences;
import com.cyanogenmod.filemanager.ui.ThemeManager;
import com.cyanogenmod.filemanager.ui.ThemeManager.Theme;
import com.cyanogenmod.filemanager.ui.dialogs.ActionsDialog;
import com.cyanogenmod.filemanager.ui.dialogs.FilesystemInfoDialog;
import com.cyanogenmod.filemanager.ui.dialogs.FilesystemInfoDialog.OnMountListener;
import com.cyanogenmod.filemanager.ui.widgets.Breadcrumb;
import com.cyanogenmod.filemanager.ui.widgets.ButtonItem;
import com.cyanogenmod.filemanager.ui.widgets.NavigationCustomTitleView;
import com.cyanogenmod.filemanager.ui.widgets.NavigationView;
import com.cyanogenmod.filemanager.ui.widgets.NavigationView.OnNavigationRequestMenuListener;
import com.cyanogenmod.filemanager.ui.widgets.NavigationView.OnNavigationSelectionChangedListener;
import com.cyanogenmod.filemanager.ui.widgets.SelectionView;
import com.cyanogenmod.filemanager.util.AndroidHelper;
import com.cyanogenmod.filemanager.util.CommandHelper;
import com.cyanogenmod.filemanager.util.DialogHelper;
import com.cyanogenmod.filemanager.util.ExceptionUtil;
import com.cyanogenmod.filemanager.util.ExceptionUtil.OnRelaunchCommandResult;
import com.cyanogenmod.filemanager.util.FileHelper;
import com.cyanogenmod.filemanager.util.StorageHelper;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * The main navigation activity. This activity is the center of the application.
 * From this the user can navigate, search, make actions.<br/>
 * This activity is singleTop, so when it is displayed no other activities exists in
 * the stack.<br/>
 * This cause an issue with the saved instance of this class, because if another activity
 * is displayed, and the process is killed, NavigationActivity is started and the saved
 * instance gets corrupted.<br/>
 * For this reason the methods {link {@link Activity#onSaveInstanceState(Bundle)} and
 * {@link Activity#onRestoreInstanceState(Bundle)} are not implemented, and every time
 * the app is killed, is restarted from his initial state.
 */
public class NavigationActivity extends Activity
    implements OnHistoryListener, OnRequestRefreshListener,
    OnNavigationRequestMenuListener, OnNavigationSelectionChangedListener {

    private static final String TAG = "NavigationActivity"; //$NON-NLS-1$

    private static boolean DEBUG = false;

    /**
     * Intent code for request a bookmark selection.
     */
    public static final int INTENT_REQUEST_BOOKMARK = 10001;

    /**
     * Intent code for request a history selection.
     */
    public static final int INTENT_REQUEST_HISTORY = 20001;

    /**
     * Intent code for request a search.
     */
    public static final int INTENT_REQUEST_SEARCH = 30001;


    /**
     * Constant for extra information about selected bookmark.
     */
    public static final String EXTRA_BOOKMARK_SELECTION =
            "extra_bookmark_selection"; //$NON-NLS-1$

    /**
     * Constant for extra information about selected history entry.
     */
    public static final String EXTRA_HISTORY_ENTRY_SELECTION =
            "extra_history_entry_selection"; //$NON-NLS-1$

    /**
     * Constant for extra information about clear selection action.
     */
    public static final String EXTRA_HISTORY_CLEAR =
            "extra_history_clear_history"; //$NON-NLS-1$

    /**
     * Constant for extra information about selected search entry.
     */
    public static final String EXTRA_SEARCH_ENTRY_SELECTION =
            "extra_search_entry_selection"; //$NON-NLS-1$

    /**
     * Constant for extra information about last search data.
     */
    public static final String EXTRA_SEARCH_LAST_SEARCH_DATA =
            "extra_search_last_search_data"; //$NON-NLS-1$

    /**
     * Constant for extra information for request a navigation to the passed path.
     */
    public static final String EXTRA_NAVIGATE_TO =
            "extra_navigate_to"; //$NON-NLS-1$

    // The timeout needed to reset the exit status for back button
    // After this time user need to tap 2 times the back button to
    // exit, and the toast is shown again after the first tap.
    private static final int RELEASE_EXIT_CHECK_TIMEOUT = 3500;

    private final BroadcastReceiver mNotificationReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent != null) {
                if (intent.getAction().compareTo(FileManagerSettings.INTENT_SETTING_CHANGED) == 0) {
                    // The settings has changed
                    String key = intent.getStringExtra(FileManagerSettings.EXTRA_SETTING_CHANGED_KEY);
                    if (key != null) {
                        // Disk usage warning level
                        if (key.compareTo(FileManagerSettings.
                                SETTINGS_DISK_USAGE_WARNING_LEVEL.getId()) == 0) {

                            // Set the free disk space warning level of the breadcrumb widget
                            Breadcrumb breadcrumb = getCurrentNavigationView().getBreadcrumb();
                            String fds = Preferences.getSharedPreferences().getString(
                                    FileManagerSettings.SETTINGS_DISK_USAGE_WARNING_LEVEL.getId(),
                                    (String)FileManagerSettings.
                                        SETTINGS_DISK_USAGE_WARNING_LEVEL.getDefaultValue());
                            breadcrumb.setFreeDiskSpaceWarningLevel(Integer.parseInt(fds));
                            breadcrumb.updateMountPointInfo();
                            return;
                        }

                        // Case sensitive sort
                        if (key.compareTo(FileManagerSettings.
                                SETTINGS_CASE_SENSITIVE_SORT.getId()) == 0) {
                            getCurrentNavigationView().refresh();
                            return;
                        }

                        // Display thumbs
                        if (key.compareTo(FileManagerSettings.
                                SETTINGS_DISPLAY_THUMBS.getId()) == 0) {
                            // Clean the icon cache applying the current theme
                            applyTheme();
                            return;
                        }

                        // Use flinger
                        if (key.compareTo(FileManagerSettings.
                                SETTINGS_USE_FLINGER.getId()) == 0) {
                            boolean useFlinger =
                                    Preferences.getSharedPreferences().getBoolean(
                                            FileManagerSettings.SETTINGS_USE_FLINGER.getId(),
                                                ((Boolean)FileManagerSettings.
                                                        SETTINGS_USE_FLINGER.
                                                            getDefaultValue()).booleanValue());
                            getCurrentNavigationView().setUseFlinger(useFlinger);
                            return;
                        }

                        // Access mode
                        if (key.compareTo(FileManagerSettings.
                                SETTINGS_ACCESS_MODE.getId()) == 0) {
                            // Is it necessary to create or exit of the ChRooted?
                            boolean chRooted =
                                    FileManagerApplication.
                                        getAccessMode().compareTo(AccessMode.SAFE) == 0;
                            if (chRooted != NavigationActivity.this.mChRooted) {
                                if (chRooted) {
                                    createChRooted();
                                } else {
                                    exitChRooted();
                                }
                            }
                        }

                        // Filetime format mode
                        if (key.compareTo(FileManagerSettings.
                                SETTINGS_FILETIME_FORMAT_MODE.getId()) == 0) {
                            // Refresh the data
                            synchronized (FileHelper.DATETIME_SYNC) {
                                FileHelper.sReloadDateTimeFormats = true;
                                NavigationActivity.this.getCurrentNavigationView().refresh();
                            }
                        }
                    }

                } else if (intent.getAction().compareTo(
                        FileManagerSettings.INTENT_FILE_CHANGED) == 0) {
                    // Retrieve the file that was changed
                    String file =
                            intent.getStringExtra(FileManagerSettings.EXTRA_FILE_CHANGED_KEY);
                    try {
                        FileSystemObject fso = CommandHelper.getFileInfo(context, file, null);
                        if (fso != null) {
                            getCurrentNavigationView().refresh(fso);
                        }
                    } catch (Exception e) {
                        ExceptionUtil.translateException(context, e, true, false);
                    }

                } else if (intent.getAction().compareTo(
                        FileManagerSettings.INTENT_THEME_CHANGED) == 0) {
                    applyTheme();

                } else if (intent.getAction().compareTo(Intent.ACTION_TIME_CHANGED) == 0 ||
                           intent.getAction().compareTo(Intent.ACTION_DATE_CHANGED) == 0 ||
                           intent.getAction().compareTo(Intent.ACTION_TIMEZONE_CHANGED) == 0) {
                    // Refresh the data
                    synchronized (FileHelper.DATETIME_SYNC) {
                        FileHelper.sReloadDateTimeFormats = true;
                        NavigationActivity.this.getCurrentNavigationView().refresh();
                    }
                }
            }
        }
    };

    /**
     * @hide
     */
    NavigationView[] mNavigationViews;
    private List<History> mHistory;

    private int mCurrentNavigationView;

    private ViewGroup mActionBar;
    private SelectionView mSelectionBar;

    private boolean mExitFlag = false;
    private long mExitBackTimeout = -1;

    private View mOptionsAnchorView;

    private int mOrientation;

    /**
     * @hide
     */
    boolean mChRooted;

    /**
     * @hide
     */
    Handler mHandler;

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onCreate(Bundle state) {

        if (DEBUG) {
            Log.d(TAG, "NavigationActivity.onCreate"); //$NON-NLS-1$
        }

        // Register the broadcast receiver
        IntentFilter filter = new IntentFilter();
        filter.addAction(FileManagerSettings.INTENT_SETTING_CHANGED);
        filter.addAction(FileManagerSettings.INTENT_FILE_CHANGED);
        filter.addAction(FileManagerSettings.INTENT_THEME_CHANGED);
        filter.addAction(Intent.ACTION_DATE_CHANGED);
        filter.addAction(Intent.ACTION_TIME_CHANGED);
        filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
        registerReceiver(this.mNotificationReceiver, filter);

        //Set the main layout of the activity
        setContentView(R.layout.navigation);

        //Initialize nfc adapter
        NfcAdapter mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
        if (mNfcAdapter != null) {
            mNfcAdapter.setBeamPushUrisCallback(new NfcAdapter.CreateBeamUrisCallback() {
                @Override
                public Uri[] createBeamUris(NfcEvent event) {
                    List<FileSystemObject> selectedFiles =
                            getCurrentNavigationView().getSelectedFiles();
                    if (selectedFiles.size() > 0) {
                        List<Uri> fileUri = new ArrayList<Uri>();
                        for (FileSystemObject f : selectedFiles) {
                            //Beam ignores folders and system files
                            if (!FileHelper.isDirectory(f) && !FileHelper.isSystemFile(f)) {
                                fileUri.add(Uri.fromFile(new File(f.getFullPath())));
                            }
                        }
                        if (fileUri.size() > 0) {
                            return fileUri.toArray(new Uri[fileUri.size()]);
                        }
                    }
                    return null;
                }
            }, this);
        }

        //Initialize activity
        init();

        //Navigation views
        initNavigationViews();

        //Initialize action bars
        initTitleActionBar();
        initStatusActionBar();
        initSelectionBar();

        // Adjust layout (only when start on landscape mode)
        int orientation = getResources().getConfiguration().orientation;
        if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
            onLayoutChanged();
        }
        this.mOrientation = orientation;

        // Apply the theme
        applyTheme();

        // Show welcome message
        showWelcomeMsg();

        this.mHandler = new Handler();
        this.mHandler.post(new Runnable() {
            @Override
            public void run() {
                // Initialize console
                initConsole();

                //Initialize navigation
                int cc = NavigationActivity.this.mNavigationViews.length;
                for (int i = 0; i < cc; i++) {
                    initNavigation(i, false, getIntent());
                }

                //Check the intent action
                checkIntent(getIntent());
            }
        });

        //Save state
        super.onCreate(state);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onNewIntent(Intent intent) {
        //Initialize navigation
        initNavigation(this.mCurrentNavigationView, true, intent);

        //Check the intent action
        checkIntent(intent);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        onLayoutChanged();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onDestroy() {
        if (DEBUG) {
            Log.d(TAG, "NavigationActivity.onDestroy"); //$NON-NLS-1$
        }

        // Unregister the receiver
        try {
            unregisterReceiver(this.mNotificationReceiver);
        } catch (Throwable ex) {
            /**NON BLOCK**/
        }

        //All destroy. Continue
        super.onDestroy();
    }

    /**
     * Method that returns the current navigation view.
     *
     * @return NavigationView The current navigation view
     */
    public NavigationView getCurrentNavigationView() {
        return getNavigationView(this.mCurrentNavigationView);
    }

    /**
     * Method that returns the current navigation view.
     *
     * @param viewId The view to return
     * @return NavigationView The current navigation view
     */
    public NavigationView getNavigationView(int viewId) {
        if (this.mNavigationViews == null) return null;
        return this.mNavigationViews[viewId];
    }

    /**
     * Method that initializes the activity.
     */
    private void init() {
        this.mHistory = new ArrayList<History>();
        this.mChRooted = FileManagerApplication.getAccessMode().compareTo(AccessMode.SAFE) == 0;
    }

    /**
     * Method that displays a welcome message the first time the user
     * access the application
     */
    private void showWelcomeMsg() {
        boolean firstUse = Preferences.getSharedPreferences().getBoolean(
                FileManagerSettings.SETTINGS_FIRST_USE.getId(),
                ((Boolean)FileManagerSettings.SETTINGS_FIRST_USE.getDefaultValue()).booleanValue());

        //Display the welcome message?
        if (firstUse) {
            AlertDialog dialog = DialogHelper.createAlertDialog(
                this, R.drawable.ic_launcher,
                R.string.welcome_title, getString(R.string.welcome_msg), false);
            DialogHelper.delegateDialogShow(this, dialog);

            // Don't display again this dialog
            try {
                Preferences.savePreference(
                        FileManagerSettings.SETTINGS_FIRST_USE, Boolean.FALSE, true);
            } catch (Exception e) {/**NON BLOCK**/}
        }
    }

    /**
     * Method that initializes the titlebar of the activity.
     */
    private void initTitleActionBar() {
        //Inflate the view and associate breadcrumb
        View titleLayout = getLayoutInflater().inflate(
                R.layout.navigation_view_customtitle, null, false);
        NavigationCustomTitleView title =
                (NavigationCustomTitleView)titleLayout.findViewById(R.id.navigation_title_flipper);
        title.setOnHistoryListener(this);
        Breadcrumb breadcrumb = (Breadcrumb)title.findViewById(R.id.breadcrumb_view);
        int cc = this.mNavigationViews.length;
        for (int i = 0; i < cc; i++) {
            this.mNavigationViews[i].setBreadcrumb(breadcrumb);
            this.mNavigationViews[i].setOnHistoryListener(this);
            this.mNavigationViews[i].setOnNavigationSelectionChangedListener(this);
            this.mNavigationViews[i].setOnNavigationOnRequestMenuListener(this);
            this.mNavigationViews[i].setCustomTitle(title);
        }

        // Set the free disk space warning level of the breadcrumb widget
        String fds = Preferences.getSharedPreferences().getString(
                FileManagerSettings.SETTINGS_DISK_USAGE_WARNING_LEVEL.getId(),
                (String)FileManagerSettings.SETTINGS_DISK_USAGE_WARNING_LEVEL.getDefaultValue());
        breadcrumb.setFreeDiskSpaceWarningLevel(Integer.parseInt(fds));

        //Configure the action bar options
        getActionBar().setBackgroundDrawable(
                getResources().getDrawable(R.drawable.bg_holo_titlebar));
        getActionBar().setDisplayOptions(
                ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_SHOW_HOME);
        getActionBar().setCustomView(titleLayout);
    }

    /**
     * Method that initializes the statusbar of the activity.
     */
    private void initStatusActionBar() {
        //Performs a width calculation of buttons. Buttons exceeds the width
        //of the action bar should be hidden
        //This application not use android ActionBar because the application
        //make uses of the title and bottom areas, and wants to force to show
        //the overflow button (without care of physical buttons)
        this.mActionBar = (ViewGroup)findViewById(R.id.navigation_actionbar);
        this.mActionBar.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
            @Override
            public void onLayoutChange(
                    View v, int left, int top, int right, int bottom, int oldLeft,
                    int oldTop, int oldRight, int oldBottom) {
                //Get the width of the action bar
                int w = v.getMeasuredWidth();

                //Wake through children calculation his dimensions
                int bw = (int)getResources().getDimension(R.dimen.default_buttom_width);
                int cw = 0;
                final ViewGroup abView = ((ViewGroup)v);
                int cc = abView.getChildCount();
                for (int i = 0; i < cc; i++) {
                    View child = abView.getChildAt(i);
                    child.setVisibility(cw + bw > w ? View.INVISIBLE : View.VISIBLE);
                    cw += bw;
                }
            }
        });

        // Have overflow menu?
        View overflow = findViewById(R.id.ab_overflow);
        boolean showOptionsMenu = AndroidHelper.showOptionsMenu(getApplicationContext());
        overflow.setVisibility(showOptionsMenu ? View.VISIBLE : View.GONE);
        this.mOptionsAnchorView = showOptionsMenu ? overflow : this.mActionBar;

        // Show the status bar
        View statusBar = findViewById(R.id.navigation_statusbar_portrait_holder);
        statusBar.setVisibility(View.VISIBLE);
    }

    /**
     * Method that initializes the selectionbar of the activity.
     */
    private void initSelectionBar() {
        this.mSelectionBar = (SelectionView)findViewById(R.id.navigation_selectionbar);
    }

    /**
     * Method that initializes the navigation views of the activity
     */
    private void initNavigationViews() {
        //Get the navigation views (wishlist: multiple view; for now only one view)
        this.mNavigationViews = new NavigationView[1];
        this.mCurrentNavigationView = 0;
        //- 0
        this.mNavigationViews[0] = (NavigationView)findViewById(R.id.navigation_view);
        this.mNavigationViews[0].setId(0);
    }

    /**
     * Method that initialize the console
     * @hide
     */
    void initConsole() {
        //Create the default console (from the preferences)
        try {
            Console console = ConsoleBuilder.getConsole(NavigationActivity.this);
            if (console == null) {
                throw new ConsoleAllocException("console == null"); //$NON-NLS-1$
            }
        } catch (Throwable ex) {
            if (!NavigationActivity.this.mChRooted) {
                //Show exception and exit
                Log.e(TAG, getString(R.string.msgs_cant_create_console), ex);
                // We don't have any console
                // Show exception and exit
                DialogHelper.showToast(
                        NavigationActivity.this,
                        R.string.msgs_cant_create_console, Toast.LENGTH_LONG);
                exit();
                return;
            }

            // We are in a trouble (something is not allowing creating the console)
            // Ask the user to return to prompt or root access mode mode with a
            // non-privileged console, prior to make crash the application
            askOrExit();
            return;
        }
    }

    /**
     * Method that initializes the navigation.
     *
     * @param viewId The navigation view identifier where apply the navigation
     * @param restore Initialize from a restore info
     * @param intent The current intent
     * @hide
     */
    void initNavigation(final int viewId, final boolean restore, final Intent intent) {
        final NavigationView navigationView = getNavigationView(viewId);
        this.mHandler.post(new Runnable() {
            @Override
            public void run() {
                //Is necessary navigate?
                if (!restore) {
                    applyInitialDir(navigationView, intent);
                }
            }
        });
    }

    /**
     * Method that applies the user-defined initial directory
     *
     * @param navigationView The navigation view
     * @param intent The current intent
     * @hide
     */
    void applyInitialDir(final NavigationView navigationView, final Intent intent) {
        //Load the user-defined initial directory
        String initialDir =
                Preferences.getSharedPreferences().getString(
                    FileManagerSettings.SETTINGS_INITIAL_DIR.getId(),
                    (String)FileManagerSettings.
                        SETTINGS_INITIAL_DIR.getDefaultValue());

        // Check if request navigation to directory (use as default), and
        // ensure chrooted and absolute path
        String navigateTo = intent.getStringExtra(EXTRA_NAVIGATE_TO);
        if (navigateTo != null && navigateTo.length() > 0) {
            initialDir = navigateTo;
        }

        if (this.mChRooted) {
            // Initial directory is the first external sdcard (sdcard, emmc, usb, ...)
            if (!StorageHelper.isPathInStorageVolume(initialDir)) {
                StorageVolume[] volumes =
                        StorageHelper.getStorageVolumes(this);
                if (volumes != null && volumes.length > 0) {
                    initialDir = volumes[0].getPath();
                    //Ensure that initial directory is an absolute directory
                    initialDir = FileHelper.getAbsPath(initialDir);
                } else {
                    // Show exception and exit
                    DialogHelper.showToast(
                            this,
                            R.string.msgs_cant_create_console, Toast.LENGTH_LONG);
                    exit();
                    return;
                }
            }
        } else {
            //Ensure that initial directory is an absolute directory
            final String userInitialDir = initialDir;
            initialDir = FileHelper.getAbsPath(initialDir);
            final String absInitialDir = initialDir;
            File f = new File(initialDir);
            boolean exists = f.exists();
            if (!exists) {
                // Fix for /data/media/0. Libcore doesn't detect it correctly.
                try {
                    exists = CommandHelper.getFileInfo(this, initialDir, false, null) != null;
                } catch (InsufficientPermissionsException ipex) {
                    ExceptionUtil.translateException(
                            this, ipex, false, true, new OnRelaunchCommandResult() {
                        @Override
                        public void onSuccess() {
                            navigationView.changeCurrentDir(absInitialDir);
                        }
                        @Override
                        public void onFailed(Throwable cause) {
                            showInitialInvalidDirectoryMsg(userInitialDir);
                            navigationView.changeCurrentDir(FileHelper.ROOT_DIRECTORY);
                        }
                        @Override
                        public void onCancelled() {
                            showInitialInvalidDirectoryMsg(userInitialDir);
                            navigationView.changeCurrentDir(FileHelper.ROOT_DIRECTORY);
                        }
                    });

                    // Asynchronous mode
                    return;
                } catch (Exception ex) {
                    // We are not interested in other exceptions
                    ExceptionUtil.translateException(this, ex, true, false);
                }

                // Check again the initial directory
                if (!exists) {
                    showInitialInvalidDirectoryMsg(userInitialDir);
                    initialDir = FileHelper.ROOT_DIRECTORY;
                }

                // Weird, but we have a valid initial directory
            }
        }

        // Change the current directory to the user-defined initial directory
        navigationView.changeCurrentDir(initialDir);
    }

    /**
     * Displays a message reporting invalid directory
     *
     * @param initialDir The initial directory
     * @hide
     */
    void showInitialInvalidDirectoryMsg(String initialDir) {
        // Change to root directory
        DialogHelper.showToast(
                this,
                getString(
                        R.string.msgs_settings_invalid_initial_directory,
                        initialDir),
                Toast.LENGTH_SHORT);
    }

    /**
     * Method that verifies the intent passed to the activity, and checks
     * if a request is made like Search.
     *
     * @param intent The intent to check
     * @hide
     */
    void checkIntent(Intent intent) {
        //Search action
        if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
            Intent searchIntent = new Intent(this, SearchActivity.class);
            searchIntent.setAction(Intent.ACTION_SEARCH);
            //- SearchActivity.EXTRA_SEARCH_DIRECTORY
            searchIntent.putExtra(
                    SearchActivity.EXTRA_SEARCH_DIRECTORY,
                    getCurrentNavigationView().getCurrentDir());
            //- SearchManager.APP_DATA
            if (intent.getBundleExtra(SearchManager.APP_DATA) != null) {
                Bundle bundle = new Bundle();
                bundle.putAll(intent.getBundleExtra(SearchManager.APP_DATA));
                searchIntent.putExtra(SearchManager.APP_DATA, bundle);
            }
            //-- SearchManager.QUERY
            String query = intent.getStringExtra(SearchManager.QUERY);
            if (query != null) {
                searchIntent.putExtra(SearchManager.QUERY, query);
            }
            //- android.speech.RecognizerIntent.EXTRA_RESULTS
            ArrayList<String> extraResults =
                    intent.getStringArrayListExtra(android.speech.RecognizerIntent.EXTRA_RESULTS);
            if (extraResults != null) {
                searchIntent.putStringArrayListExtra(
                        android.speech.RecognizerIntent.EXTRA_RESULTS, extraResults);
            }
            startActivityForResult(searchIntent, INTENT_REQUEST_SEARCH);
            return;
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_MENU) {
            showOverflowPopUp(this.mOptionsAnchorView);
            return true;
        }
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            if (checkBackAction()) {
                return true;
            }

            // An exit event has occurred, force the destroy the consoles
            exit();
        }
        return super.onKeyUp(keyCode, event);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
       switch (item.getItemId()) {
          case android.R.id.home:
              if ((getActionBar().getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP)
                      == ActionBar.DISPLAY_HOME_AS_UP) {
                  checkBackAction();
              }
              return true;
          default:
             return super.onOptionsItemSelected(item);
       }
    }

    /**
     * Method invoked when an action item is clicked.
     *
     * @param view The button pushed
     */
    public void onActionBarItemClick(View view) {
        switch (view.getId()) {
            //######################
            //Navigation Custom Title
            //######################
            case R.id.ab_configuration:
                //Show navigation view configuration toolbar
                getCurrentNavigationView().getCustomTitle().showConfigurationView();
                getActionBar().setDisplayHomeAsUpEnabled(true);
                getActionBar().setHomeButtonEnabled(true);
                break;
            case R.id.ab_close:
                //Hide navigation view configuration toolbar
                getCurrentNavigationView().getCustomTitle().hideConfigurationView();
                break;

            //######################
            //Breadcrumb Actions
            //######################
            case R.id.ab_filesystem_info:
                //Show information of the filesystem
                MountPoint mp = getCurrentNavigationView().getBreadcrumb().getMountPointInfo();
                DiskUsage du = getCurrentNavigationView().getBreadcrumb().getDiskUsageInfo();
                showMountPointInfo(mp, du);
                break;

            //######################
            //Navigation view options
            //######################
            case R.id.ab_sort_mode:
                showSettingsPopUp(view,
                        Arrays.asList(
                                new FileManagerSettings[]{
                                        FileManagerSettings.SETTINGS_SORT_MODE}));
                break;
            case R.id.ab_layout_mode:
                showSettingsPopUp(view,
                        Arrays.asList(
                                new FileManagerSettings[]{
                                        FileManagerSettings.SETTINGS_LAYOUT_MODE}));
                break;
            case R.id.ab_view_options:
                // If we are in ChRooted mode, then don't show non-secure items
                if (this.mChRooted) {
                    showSettingsPopUp(view,
                            Arrays.asList(new FileManagerSettings[]{
                                    FileManagerSettings.SETTINGS_SHOW_DIRS_FIRST}));
                } else {
                    showSettingsPopUp(view,
                            Arrays.asList(new FileManagerSettings[]{
                                    FileManagerSettings.SETTINGS_SHOW_DIRS_FIRST,
                                    FileManagerSettings.SETTINGS_SHOW_HIDDEN,
                                    FileManagerSettings.SETTINGS_SHOW_SYSTEM,
                                    FileManagerSettings.SETTINGS_SHOW_SYMLINKS}));
                }

                break;

            //######################
            //Selection Actions
            //######################
            case R.id.ab_selection_done:
                //Show information of the filesystem
                getCurrentNavigationView().onDeselectAll();
                break;

            //######################
            //Action Bar buttons
            //######################
            case R.id.ab_actions:
                openActionsDialog(getCurrentNavigationView().getCurrentDir(), true);
                break;

            case R.id.ab_bookmarks:
                openBookmarks();
                break;

            case R.id.ab_history:
                openHistory();
                break;

            case R.id.ab_search:
                openSearch();
                break;

            case R.id.ab_overflow:
                showOverflowPopUp(view);
                break;

            default:
                break;
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (data != null) {
            switch (requestCode) {
                case INTENT_REQUEST_BOOKMARK:
                    if (resultCode == RESULT_OK) {
                        FileSystemObject fso =
                                (FileSystemObject)data.
                                    getSerializableExtra(EXTRA_BOOKMARK_SELECTION);
                        if (fso != null) {
                            //Open the fso
                            getCurrentNavigationView().open(fso);
                        }
                    }
                    break;

                case INTENT_REQUEST_HISTORY:
                    if (resultCode == RESULT_OK) {
                        //Change current directory
                        History history =
                                (History)data.getSerializableExtra(EXTRA_HISTORY_ENTRY_SELECTION);
                        navigateToHistory(history);
                    } else if (resultCode == RESULT_CANCELED) {
                        boolean clear = data.getBooleanExtra(EXTRA_HISTORY_CLEAR, false);
                        if (clear) {
                            clearHistory();
                        }
                    }
                    break;

                case INTENT_REQUEST_SEARCH:
                    if (resultCode == RESULT_OK) {
                        //Change directory?
                        FileSystemObject fso =
                                (FileSystemObject)data.
                                    getSerializableExtra(EXTRA_SEARCH_ENTRY_SELECTION);
                        SearchInfoParcelable searchInfo =
                                data.getParcelableExtra(EXTRA_SEARCH_LAST_SEARCH_DATA);
                        if (fso != null) {
                            //Goto to new directory
                            getCurrentNavigationView().open(fso, searchInfo);
                        }
                    } else if (resultCode == RESULT_CANCELED) {
                        SearchInfoParcelable searchInfo =
                                data.getParcelableExtra(EXTRA_SEARCH_LAST_SEARCH_DATA);
                        if (searchInfo != null && searchInfo.isSuccessNavigation()) {
                            //Navigate to previous history
                            back();
                        } else {
                            // I don't know is the search view was changed, so try to do a refresh
                            // of the navigation view
                            getCurrentNavigationView().refresh(true);
                        }
                    }
                    break;

                default:
                    break;
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onNewHistory(HistoryNavigable navigable) {
        //Recollect information about current status
        History history = new History(this.mHistory.size(), navigable);
        this.mHistory.add(history);
        getActionBar().setDisplayHomeAsUpEnabled(true);
        getActionBar().setHomeButtonEnabled(true);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onCheckHistory() {
        //Need to show HomeUp Button
        boolean enabled = this.mHistory != null && this.mHistory.size() > 0;
        getActionBar().setDisplayHomeAsUpEnabled(enabled);
        getActionBar().setHomeButtonEnabled(enabled);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onRequestRefresh(Object o, boolean clearSelection) {
        if (o instanceof FileSystemObject) {
            // Refresh only the item
            this.getCurrentNavigationView().refresh((FileSystemObject)o);
        } else if (o == null) {
            // Refresh all
            getCurrentNavigationView().refresh();
        }
        if (clearSelection) {
            this.getCurrentNavigationView().onDeselectAll();
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onRequestRemove(Object o, boolean clearSelection) {
        if (o instanceof FileSystemObject) {
            // Remove from view
            this.getCurrentNavigationView().removeItem((FileSystemObject)o);

            //Remove from history
            removeFromHistory((FileSystemObject)o);
        } else {
            onRequestRefresh(null, clearSelection);
        }
        if (clearSelection) {
            this.getCurrentNavigationView().onDeselectAll();
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onNavigateTo(Object o) {
        // Ignored
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onSelectionChanged(NavigationView navView, List<FileSystemObject> selectedItems) {
        this.mSelectionBar.setSelection(selectedItems);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onRequestMenu(NavigationView navView, FileSystemObject item) {
        // Show the actions dialog
        openActionsDialog(item, false);
    }

    /**
     * Method that shows a popup with a menu associated a {@link FileManagerSettings}.
     *
     * @param anchor The action button that was pressed
     * @param settings The array of settings associated with the action button
     */
    private void showSettingsPopUp(View anchor, List<FileManagerSettings> settings) {
        //Create the adapter
        final MenuSettingsAdapter adapter = new MenuSettingsAdapter(this, settings);

        //Create a show the popup menu
        final ListPopupWindow popup = DialogHelper.createListPopupWindow(this, adapter, anchor);
        popup.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
                FileManagerSettings setting =
                        ((MenuSettingsAdapter)parent.getAdapter()).getSetting(position);
                final int value = ((MenuSettingsAdapter)parent.getAdapter()).getId(position);
                popup.dismiss();
                try {
                    if (setting.compareTo(FileManagerSettings.SETTINGS_LAYOUT_MODE) == 0) {
                        //Need to change the layout
                        getCurrentNavigationView().changeViewMode(
                                NavigationLayoutMode.fromId(value));
                    } else {
                        //Save and refresh
                        if (setting.getDefaultValue() instanceof Enum<?>) {
                            //Enumeration
                            Preferences.savePreference(setting, new ObjectIdentifier() {
                                @Override
                                public int getId() {
                                    return value;
                                }
                            }, false);
                        } else {
                            //Boolean
                            boolean newval =
                                    Preferences.getSharedPreferences().
                                        getBoolean(
                                            setting.getId(),
                                            ((Boolean)setting.getDefaultValue()).booleanValue());
                            Preferences.savePreference(setting, Boolean.valueOf(!newval), false);
                        }
                        getCurrentNavigationView().refresh();
                    }
                } catch (Exception e) {
                    Log.e(TAG, "Error applying navigation option", e); //$NON-NLS-1$
                    NavigationActivity.this.mHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            DialogHelper.showToast(
                                    NavigationActivity.this,
                                    R.string.msgs_settings_save_failure, Toast.LENGTH_SHORT);
                        }
                    });

                } finally {
                    adapter.dispose();
                    getCurrentNavigationView().getCustomTitle().restoreView();
                }

            }
        });
        popup.setOnDismissListener(new PopupWindow.OnDismissListener() {
            @Override
            public void onDismiss() {
                adapter.dispose();
            }
        });
        popup.show();
    }

    /**
     * Method that shows a popup with the activity main menu.
     *
     * @param anchor The action button that was pressed
     */
    private void showOverflowPopUp(View anchor) {
        SimpleMenuListAdapter adapter =
                new HighlightedSimpleMenuListAdapter(this, R.menu.navigation);
        Menu menu = adapter.getMenu();
        int cc = this.mActionBar.getChildCount();
        for (int i = 0, j = this.mActionBar.getChildCount() - 1; i < cc; i++, j--) {
            View child = this.mActionBar.getChildAt(i);
            boolean visible = child.getVisibility() == View.VISIBLE;
            if (visible) {
                menu.removeItem(menu.getItem(j).getItemId());
            }
        }

        final ListPopupWindow popup = DialogHelper.createListPopupWindow(this, adapter, anchor);
        popup.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(
                    final AdapterView<?> parent, final View v, final int position, final long id) {

                final int itemId = (int)id;
                NavigationActivity.this.mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        popup.dismiss();
                        switch (itemId) {
                            case R.id.mnu_settings:
                                //Settings
                                Intent settings = new Intent(
                                        NavigationActivity.this, SettingsPreferences.class);
                                startActivity(settings);
                                break;

                            case R.id.mnu_history:
                                //History
                                openHistory();
                                popup.dismiss();
                                break;

                            case R.id.mnu_bookmarks:
                                //Bookmarks
                                openBookmarks();
                                popup.dismiss();
                                break;

                            case R.id.mnu_search:
                                //Search
                                openSearch();
                                popup.dismiss();
                                break;
                            default:
                                break;
                        }
                    }
                });
            }
        });
        popup.show();
    }

    /**
     * Method that show the information of a filesystem mount point.
     *
     * @param mp The mount point info
     * @param du The disk usage of the mount point
     */
    private void showMountPointInfo(MountPoint mp, DiskUsage du) {
        //Has mount point info?
        if (mp == null) {
            //There is no information
            AlertDialog alert =
                    DialogHelper.createWarningDialog(
                            this,
                            R.string.filesystem_info_warning_title,
                            R.string.filesystem_info_warning_msg);
            DialogHelper.delegateDialogShow(this, alert);
            return;
        }

        //Show a the filesystem info dialog
        FilesystemInfoDialog dialog = new FilesystemInfoDialog(this, mp, du);
        dialog.setOnMountListener(new OnMountListener() {
            @Override
            public void onRemount(MountPoint mountPoint) {
                //Update the statistics of breadcrumb, only if mount point is the same
                Breadcrumb breadcrumb = getCurrentNavigationView().getBreadcrumb();
                if (breadcrumb.getMountPointInfo().compareTo(mountPoint) == 0) {
                    breadcrumb.updateMountPointInfo();
                }
            }
        });
        dialog.show();
    }

    /**
     * Method that checks the action that must be realized when the
     * back button is pushed.
     *
     * @return boolean Indicates if the action must be intercepted
     */
    private boolean checkBackAction() {
        // We need a basic structure to check this
        if (getCurrentNavigationView() == null) return false;

        //Check if the configuration view is showing. In this case back
        //action must be "close configuration"
        if (getCurrentNavigationView().getCustomTitle().isConfigurationViewShowing()) {
            getCurrentNavigationView().getCustomTitle().restoreView();
            return true;
        }

        //Do back operation over the navigation history
        boolean flag = this.mExitFlag;

        this.mExitFlag = !back();

        // Retrieve if the exit status timeout has expired
        long now = System.currentTimeMillis();
        boolean timeout = (this.mExitBackTimeout == -1 ||
                            (now - this.mExitBackTimeout) > RELEASE_EXIT_CHECK_TIMEOUT);

        //Check if there no history and if the user was advised in the last back action
        if (this.mExitFlag && (this.mExitFlag != flag || timeout)) {
            //Communicate the user that the next time the application will be closed
            this.mExitBackTimeout = System.currentTimeMillis();
            DialogHelper.showToast(this, R.string.msgs_push_again_to_exit, Toast.LENGTH_SHORT);
            return true;
        }

        //Back action not applied
        return !this.mExitFlag;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean onSearchRequested() {
        Bundle bundle = new Bundle();
        bundle.putString(
                SearchActivity.EXTRA_SEARCH_DIRECTORY,
                getCurrentNavigationView().getCurrentDir());
        startSearch(Preferences.getLastSearch(), true, bundle, false);
        return true;
    }

    /**
     * Method that returns the history size.
     */
    private void clearHistory() {
        this.mHistory.clear();
        onCheckHistory();
    }

    /**
     * Method that navigates to the passed history reference.
     *
     * @param history The history reference
     * @return boolean A problem occurs while navigate
     */
    public synchronized boolean navigateToHistory(History history) {
        try {
            //Gets the history
            History realHistory = this.mHistory.get(history.getPosition());

            //Navigate to item. Check what kind of history is
            if (realHistory.getItem() instanceof NavigationViewInfoParcelable) {
                //Navigation
                NavigationViewInfoParcelable info =
                        (NavigationViewInfoParcelable)realHistory.getItem();
                int viewId = info.getId();
                NavigationView view = getNavigationView(viewId);
                // Selected items must not be restored from on history navigation
                info.setSelectedFiles(view.getSelectedFiles());
                if (!view.onRestoreState(info)) {
                    return true;
                }

            } else if (realHistory.getItem() instanceof SearchInfoParcelable) {
                //Search (open search with the search results)
                SearchInfoParcelable info = (SearchInfoParcelable)realHistory.getItem();
                Intent searchIntent = new Intent(this, SearchActivity.class);
                searchIntent.setAction(SearchActivity.ACTION_RESTORE);
                searchIntent.putExtra(SearchActivity.EXTRA_SEARCH_RESTORE, (Parcelable)info);
                startActivityForResult(searchIntent, INTENT_REQUEST_SEARCH);
            } else {
                //The type is unknown
                throw new IllegalArgumentException("Unknown history type"); //$NON-NLS-1$
            }

            //Remove the old history
            int cc = realHistory.getPosition();
            for (int i = this.mHistory.size() - 1; i >= cc; i--) {
                this.mHistory.remove(i);
            }
            if (this.mHistory.size() == 0) {
                getActionBar().setDisplayHomeAsUpEnabled(false);
                getActionBar().setHomeButtonEnabled(false);
            }

            //Navigate
            return true;

        } catch (Throwable ex) {
            if (history != null) {
                Log.e(TAG,
                        String.format("Failed to navigate to history %d: %s", //$NON-NLS-1$
                                Integer.valueOf(history.getPosition()),
                                history.getItem().getTitle()), ex);
            } else {
                Log.e(TAG,
                        String.format("Failed to navigate to history: null", ex)); //$NON-NLS-1$
            }
            this.mHandler.post(new Runnable() {
                @Override
                public void run() {
                    DialogHelper.showToast(
                            NavigationActivity.this,
                            R.string.msgs_history_unknown, Toast.LENGTH_LONG);
                }
            });

            //Not change directory
            return false;
        }
    }

    /**
     * Method that request a back action over the navigation history.
     *
     * @return boolean If a back action was applied
     */
    public boolean back() {
        // Check that has valid history
        while (this.mHistory.size() > 0) {
            History h = this.mHistory.get(this.mHistory.size() - 1);
            if (h.getItem() instanceof NavigationViewInfoParcelable) {
                // Verify that the path exists
                String path = ((NavigationViewInfoParcelable)h.getItem()).getCurrentDir();

                try {
                    FileSystemObject info = CommandHelper.getFileInfo(this, path, null);
                    if (info != null) {
                        break;
                    }
                    this.mHistory.remove(this.mHistory.size() - 1);
                } catch (Exception e) {
                    ExceptionUtil.translateException(this, e, true, false);
                    this.mHistory.remove(this.mHistory.size() - 1);
                }
            } else {
                break;
            }
        }

        //Extract a history from the
        if (this.mHistory.size() > 0) {
            //Navigate to history
            return navigateToHistory(this.mHistory.get(this.mHistory.size() - 1));
        }

        //Nothing to apply
        return false;
    }

    /**
     * Method that opens the actions dialog
     *
     * @param item The path or the {@link FileSystemObject}
     * @param global If the menu to display is the one with global actions
     */
    private void openActionsDialog(Object item, boolean global) {
        // Resolve the full path
        String path = String.valueOf(item);
        if (item instanceof FileSystemObject) {
            path = ((FileSystemObject)item).getFullPath();
        }

        // Prior to show the dialog, refresh the item reference
        FileSystemObject fso = null;
        try {
            fso = CommandHelper.getFileInfo(this, path, false, null);
            if (fso == null) {
                throw new NoSuchFileOrDirectory(path);
            }

        } catch (Exception e) {
            // Notify the user
            ExceptionUtil.translateException(this, e);

            // Remove the object
            if (e instanceof FileNotFoundException || e instanceof NoSuchFileOrDirectory) {
                // If have a FileSystemObject reference then there is no need to search
                // the path (less resources used)
                if (item instanceof FileSystemObject) {
                    getCurrentNavigationView().removeItem((FileSystemObject)item);
                } else {
                    getCurrentNavigationView().removeItem((String)item);
                }
            }
            return;
        }

        // Show the dialog
        ActionsDialog dialog = new ActionsDialog(this, fso, global, false);
        dialog.setOnRequestRefreshListener(this);
        dialog.setOnSelectionListener(getCurrentNavigationView());
        dialog.show();
    }

    /**
     * Method that opens the bookmarks activity.
     * @hide
     */
    void openBookmarks() {
        Intent bookmarksIntent = new Intent(this, BookmarksActivity.class);
        bookmarksIntent.addFlags(Intent.FLAG_ACTIVITY_TASK_ON_HOME);
        startActivityForResult(bookmarksIntent, INTENT_REQUEST_BOOKMARK);
    }

    /**
     * Method that opens the history activity.
     * @hide
     */
    void openHistory() {
        Intent historyIntent = new Intent(this, HistoryActivity.class);
        historyIntent.putExtra(HistoryActivity.EXTRA_HISTORY_LIST, (Serializable)this.mHistory);
        historyIntent.addFlags(Intent.FLAG_ACTIVITY_TASK_ON_HOME);
        startActivityForResult(historyIntent, INTENT_REQUEST_HISTORY);
    }

    /**
     * Method that opens the search activity.
     * @hide
     */
    void openSearch() {
        onSearchRequested();
    }

    /**
     * Method that remove the {@link FileSystemObject} from the history
     */
    private void removeFromHistory(FileSystemObject fso) {
        if (this.mHistory != null) {
            int cc = this.mHistory.size();
            for (int i = cc-1; i >= 0 ; i--) {
                History history = this.mHistory.get(i);
                if (history.getItem() instanceof NavigationViewInfoParcelable) {
                    String p0 = fso.getFullPath();
                    String p1 =
                            ((NavigationViewInfoParcelable)history.getItem()).getCurrentDir();
                    if (p0.compareTo(p1) == 0) {
                        this.mHistory.remove(i);
                    }
                }
            }
        }
    }

    /**
     * Method that ask the user to change the access mode prior to crash.
     * @hide
     */
    void askOrExit() {
        //Show a dialog asking the user
        AlertDialog dialog =
            DialogHelper.createYesNoDialog(
                this,
                R.string.msgs_change_to_prompt_access_mode_title,
                R.string.msgs_change_to_prompt_access_mode_msg,
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface alertDialog, int which) {
                        if (which == DialogInterface.BUTTON_NEGATIVE) {
                            // We don't have any console
                            // Show exception and exit
                            DialogHelper.showToast(
                                    NavigationActivity.this,
                                    R.string.msgs_cant_create_console, Toast.LENGTH_LONG);
                            exit();
                            return;
                        }

                        // Ok. Now try to change to prompt mode. Any crash
                        // here is a fatal error. We won't have any console to operate.
                        try {
                            // Change console
                            ConsoleBuilder.changeToNonPrivilegedConsole(NavigationActivity.this);

                            // Save preferences
                            Preferences.savePreference(
                                    FileManagerSettings.SETTINGS_ACCESS_MODE,
                                    AccessMode.PROMPT, true);

                        } catch (Exception e) {
                            // Displays an exception and exit
                            Log.e(TAG, getString(R.string.msgs_cant_create_console), e);
                            DialogHelper.showToast(
                                    NavigationActivity.this,
                                    R.string.msgs_cant_create_console, Toast.LENGTH_LONG);
                            exit();
                        }
                    }
               });
        DialogHelper.delegateDialogShow(this, dialog);
    }

    /**
     * Method that creates a ChRooted environment, protecting the user to break anything in
     * the device
     * @hide
     */
    void createChRooted() {
        // If we are in a ChRooted mode, then do nothing
        if (this.mChRooted) return;
        this.mChRooted = true;

        int cc = this.mNavigationViews.length;
        for (int i = 0; i < cc; i++) {
            this.mNavigationViews[i].createChRooted();
        }

        // Remove the selection
        cc = this.mNavigationViews.length;
        for (int i = 0; i < cc; i++) {
            getCurrentNavigationView().onDeselectAll();
        }

        // Remove the history (don't allow to access to previous data)
        clearHistory();
    }

    /**
     * Method that exits from a ChRooted
     * @hide
     */
    void exitChRooted() {
        // If we aren't in a ChRooted mode, then do nothing
        if (!this.mChRooted) return;
        this.mChRooted = false;

        int cc = this.mNavigationViews.length;
        for (int i = 0; i < cc; i++) {
            this.mNavigationViews[i].exitChRooted();
        }
    }

    /**
     * Method called when a controlled exit is required
     * @hide
     */
    void exit() {
        // Recycle the navigation views
        int cc = this.mNavigationViews.length;
        for (int i = 0; i < cc; i++) {
            this.mNavigationViews[i].recycle();
        }
        try {
            FileManagerApplication.destroyBackgroundConsole();
        } catch (Throwable ex) {
            /**NON BLOCK**/
        }
        try {
            ConsoleBuilder.destroyConsole();
        } catch (Throwable ex) {
            /**NON BLOCK**/
        }
        finish();
    }

    /**
     * Method that reconfigures the layout for better fit in portrait and landscape modes
     */
    private void onLayoutChanged() {
        Theme theme = ThemeManager.getCurrentTheme(this);

        // Apply only when the orientation was changed
        int orientation = getResources().getConfiguration().orientation;
        if (this.mOrientation == orientation) return;
        this.mOrientation = orientation;

        if (this.mOrientation == Configuration.ORIENTATION_LANDSCAPE) {
            // Landscape mode
            ViewGroup statusBar = (ViewGroup)findViewById(R.id.navigation_statusbar);
            if (statusBar.getParent() != null) {
                ViewGroup parent = (ViewGroup) statusBar.getParent();
                parent.removeView(statusBar);
            }

            // Calculate the action button size (all the buttons must fit in the title bar)
            int bw = (int)getResources().getDimension(R.dimen.default_buttom_width);
            int abw = this.mActionBar.getChildCount() * bw;
            int rbw = 0;
            int cc = statusBar.getChildCount();
            for (int i = 0; i < cc; i++) {
                View child = statusBar.getChildAt(i);
                if (child instanceof ButtonItem) {
                    rbw += bw;
                }
            }
            int w = abw + rbw;
            boolean showOptionsMenu = AndroidHelper.showOptionsMenu(getApplicationContext());
            if (!showOptionsMenu) {
                w -= bw;
            }

            // Add to the new location
            ViewGroup newParent = (ViewGroup)findViewById(R.id.navigation_title_landscape_holder);
            LinearLayout.LayoutParams params =
                    new LinearLayout.LayoutParams(
                            w,
                            ViewGroup.LayoutParams.MATCH_PARENT);
            statusBar.setLayoutParams(params);
            newParent.addView(statusBar);

            // Apply theme
            theme.setBackgroundDrawable(this, statusBar, "titlebar_drawable"); //$NON-NLS-1$

            // Hide holder
            View holder = findViewById(R.id.navigation_statusbar_portrait_holder);
            holder.setVisibility(View.GONE);

        } else {
            // Portrait mode
            ViewGroup statusBar = (ViewGroup)findViewById(R.id.navigation_statusbar);
            if (statusBar.getParent() != null) {
                ViewGroup parent = (ViewGroup) statusBar.getParent();
                parent.removeView(statusBar);
            }

            // Add to the new location
            ViewGroup newParent = (ViewGroup)findViewById(
                    R.id.navigation_statusbar_portrait_holder);
            LinearLayout.LayoutParams params =
                    new LinearLayout.LayoutParams(
                            ViewGroup.LayoutParams.MATCH_PARENT,
                            ViewGroup.LayoutParams.MATCH_PARENT);
            statusBar.setLayoutParams(params);
            newParent.addView(statusBar);

            // Apply theme
            theme.setBackgroundDrawable(this, statusBar, "statusbar_drawable"); //$NON-NLS-1$

            // Show holder
            newParent.setVisibility(View.VISIBLE);
        }
    }

    /**
     * Method that applies the current theme to the activity
     * @hide
     */
    void applyTheme() {
        int orientation = getResources().getConfiguration().orientation;
        Theme theme = ThemeManager.getCurrentTheme(this);
        theme.setBaseTheme(this, false);

        //- Layout
        View v = findViewById(R.id.navigation_layout);
        theme.setBackgroundDrawable(this, v, "background_drawable"); //$NON-NLS-1$
        //- ActionBar
        theme.setTitlebarDrawable(this, getActionBar(), "titlebar_drawable"); //$NON-NLS-1$
        //- StatusBar
        v = findViewById(R.id.navigation_statusbar);
        if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
            theme.setBackgroundDrawable(this, v, "titlebar_drawable"); //$NON-NLS-1$
        } else {
            theme.setBackgroundDrawable(this, v, "statusbar_drawable"); //$NON-NLS-1$
        }
        v = findViewById(R.id.ab_overflow);
        theme.setImageDrawable(this, (ImageView)v, "ab_overflow_drawable"); //$NON-NLS-1$
        v = findViewById(R.id.ab_actions);
        theme.setImageDrawable(this, (ImageView)v, "ab_actions_drawable"); //$NON-NLS-1$
        v = findViewById(R.id.ab_search);
        theme.setImageDrawable(this, (ImageView)v, "ab_search_drawable"); //$NON-NLS-1$
        v = findViewById(R.id.ab_bookmarks);
        theme.setImageDrawable(this, (ImageView)v, "ab_bookmarks_drawable"); //$NON-NLS-1$
        v = findViewById(R.id.ab_history);
        theme.setImageDrawable(this, (ImageView)v, "ab_history_drawable"); //$NON-NLS-1$
        //- Expanders
        v = findViewById(R.id.ab_configuration);
        theme.setImageDrawable(this, (ImageView)v, "expander_open_drawable"); //$NON-NLS-1$
        v = findViewById(R.id.ab_close);
        theme.setImageDrawable(this, (ImageView)v, "expander_close_drawable"); //$NON-NLS-1$
        v = findViewById(R.id.ab_sort_mode);
        theme.setImageDrawable(this, (ImageView)v, "ab_sort_mode_drawable"); //$NON-NLS-1$
        v = findViewById(R.id.ab_layout_mode);
        theme.setImageDrawable(this, (ImageView)v, "ab_layout_mode_drawable"); //$NON-NLS-1$
        v = findViewById(R.id.ab_view_options);
        theme.setImageDrawable(this, (ImageView)v, "ab_view_options_drawable"); //$NON-NLS-1$
        //- SelectionBar
        v = findViewById(R.id.navigation_selectionbar);
        theme.setBackgroundDrawable(this, v, "selectionbar_drawable"); //$NON-NLS-1$
        v = findViewById(R.id.ab_selection_done);
        theme.setImageDrawable(this, (ImageView)v, "ab_selection_done_drawable"); //$NON-NLS-1$
        v = findViewById(R.id.navigation_status_selection_label);
        theme.setTextColor(this, (TextView)v, "text_color"); //$NON-NLS-1$
        //- NavigationView
        int cc = this.mNavigationViews.length;
        for (int i = 0; i < cc; i++) {
            getNavigationView(i).applyTheme();
        }
    }

}