michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.preferences;
michael@0: 
michael@0: import java.lang.reflect.Field;
michael@0: 
michael@0: import org.mozilla.gecko.GeckoSharedPrefs;
michael@0: import org.mozilla.gecko.PrefsHelper;
michael@0: import org.mozilla.gecko.R;
michael@0: 
michael@0: import android.app.Activity;
michael@0: import android.os.Bundle;
michael@0: import android.preference.PreferenceActivity;
michael@0: import android.preference.PreferenceFragment;
michael@0: import android.preference.PreferenceScreen;
michael@0: import android.util.Log;
michael@0: import android.view.Menu;
michael@0: import android.view.MenuInflater;
michael@0: import android.view.ViewConfiguration;
michael@0: 
michael@0: /* A simple implementation of PreferenceFragment for large screen devices
michael@0:  * This will strip category headers (so that they aren't shown to the user twice)
michael@0:  * as well as initializing Gecko prefs when a fragment is shown.
michael@0: */
michael@0: public class GeckoPreferenceFragment extends PreferenceFragment {
michael@0: 
michael@0:     private static final String LOGTAG = "GeckoPreferenceFragment";
michael@0:     private int mPrefsRequestId = 0;
michael@0: 
michael@0:     @Override
michael@0:     public void onCreate(Bundle savedInstanceState) {
michael@0:         super.onCreate(savedInstanceState);
michael@0: 
michael@0:         // Write prefs to our custom GeckoSharedPrefs file.
michael@0:         getPreferenceManager().setSharedPreferencesName(GeckoSharedPrefs.APP_PREFS_NAME);
michael@0: 
michael@0:         int res = getResource();
michael@0: 
michael@0:         // Display a menu for Search preferences.
michael@0:         if (res == R.xml.preferences_search) {
michael@0:             setHasOptionsMenu(true);
michael@0:         }
michael@0: 
michael@0:         addPreferencesFromResource(res);
michael@0: 
michael@0:         PreferenceScreen screen = getPreferenceScreen();
michael@0:         setPreferenceScreen(screen);
michael@0:         mPrefsRequestId = ((GeckoPreferences)getActivity()).setupPreferences(screen);
michael@0:     }
michael@0: 
michael@0:     /*
michael@0:      * Get the resource from Fragment arguments and return it.
michael@0:      *
michael@0:      * If no resource can be found, return the resource id of the default preference screen.
michael@0:      */
michael@0:     private int getResource() {
michael@0:         int resid = 0;
michael@0: 
michael@0:         String resourceName = getArguments().getString("resource");
michael@0:         if (resourceName != null) {
michael@0:             // Fetch resource id by resource name.
michael@0:             resid = getActivity().getResources().getIdentifier(resourceName,
michael@0:                                                              "xml",
michael@0:                                                              getActivity().getPackageName());
michael@0:         }
michael@0: 
michael@0:         if (resid == 0) {
michael@0:             // The resource was invalid. Use the default resource.
michael@0:             Log.e(LOGTAG, "Failed to find resource: " + resourceName + ". Displaying default settings.");
michael@0: 
michael@0:             boolean isMultiPane = ((PreferenceActivity) getActivity()).onIsMultiPane();
michael@0:             resid = isMultiPane ? R.xml.preferences_customize_tablet : R.xml.preferences;
michael@0:         }
michael@0: 
michael@0:         return resid;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
michael@0:         super.onCreateOptionsMenu(menu, inflater);
michael@0:         inflater.inflate(R.menu.preferences_search_menu, menu);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onDestroy() {
michael@0:         super.onDestroy();
michael@0:         if (mPrefsRequestId > 0) {
michael@0:             PrefsHelper.removeObserver(mPrefsRequestId);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onAttach(Activity activity) {
michael@0:         super.onAttach(activity);
michael@0:         showOverflowMenu(activity);
michael@0:     }
michael@0: 
michael@0:     /*
michael@0:      * Force the overflow 3-dot menu to be displayed if it isn't already displayed.
michael@0:      *
michael@0:      * This is an ugly hack for 4.0+ Android devices that don't have a dedicated menu button
michael@0:      * because Android does not provide a public API to display the ActionBar overflow menu.
michael@0:      */
michael@0:     private void showOverflowMenu(Activity activity) {
michael@0:         try {
michael@0:             ViewConfiguration config = ViewConfiguration.get(activity);
michael@0:             Field menuOverflow = ViewConfiguration.class.getDeclaredField("sHasPermanentMenuKey");
michael@0:             if (menuOverflow != null) {
michael@0:                 menuOverflow.setAccessible(true);
michael@0:                 menuOverflow.setBoolean(config, false);
michael@0:             }
michael@0:         } catch (Exception e) {
michael@0:             Log.d(LOGTAG, "Failed to force overflow menu, ignoring.");
michael@0:         }
michael@0:     }
michael@0: }