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 android.content.Context;
michael@0: import android.preference.Preference;
michael@0: import android.util.AttributeSet;
michael@0: import android.util.Log;
michael@0: 
michael@0: import org.json.JSONArray;
michael@0: import org.json.JSONException;
michael@0: import org.json.JSONObject;
michael@0: 
michael@0: import org.mozilla.gecko.GeckoAppShell;
michael@0: import org.mozilla.gecko.GeckoEvent;
michael@0: import org.mozilla.gecko.util.GeckoEventListener;
michael@0: import org.mozilla.gecko.util.ThreadUtils;
michael@0: 
michael@0: public class SearchPreferenceCategory extends CustomListCategory implements GeckoEventListener {
michael@0:     public static final String LOGTAG = "SearchPrefCategory";
michael@0: 
michael@0:     public SearchPreferenceCategory(Context context) {
michael@0:         super(context);
michael@0:     }
michael@0: 
michael@0:     public SearchPreferenceCategory(Context context, AttributeSet attrs) {
michael@0:         super(context, attrs);
michael@0:     }
michael@0: 
michael@0:     public SearchPreferenceCategory(Context context, AttributeSet attrs, int defStyle) {
michael@0:         super(context, attrs, defStyle);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected void onAttachedToActivity() {
michael@0:         super.onAttachedToActivity();
michael@0: 
michael@0:         // Register for SearchEngines messages and request list of search engines from Gecko.
michael@0:         GeckoAppShell.registerEventListener("SearchEngines:Data", this);
michael@0:         GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("SearchEngines:GetVisible", null));
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected void onPrepareForRemoval() {
michael@0:         GeckoAppShell.unregisterEventListener("SearchEngines:Data", this);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void setDefault(CustomListPreference item) {
michael@0:         super.setDefault(item);
michael@0: 
michael@0:         sendGeckoEngineEvent("SearchEngines:SetDefault", item.getTitle().toString());
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void uninstall(CustomListPreference item) {
michael@0:         super.uninstall(item);
michael@0: 
michael@0:         sendGeckoEngineEvent("SearchEngines:Remove", item.getTitle().toString());
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void handleMessage(String event, final JSONObject data) {
michael@0:         if (event.equals("SearchEngines:Data")) {
michael@0:             // Parse engines array from JSON.
michael@0:             JSONArray engines;
michael@0:             try {
michael@0:                 engines = data.getJSONArray("searchEngines");
michael@0:             } catch (JSONException e) {
michael@0:                 Log.e(LOGTAG, "Unable to decode search engine data from Gecko.", e);
michael@0:                 return;
michael@0:             }
michael@0: 
michael@0:             // Clear the preferences category from this thread.
michael@0:             this.removeAll();
michael@0: 
michael@0:             // Create an element in this PreferenceCategory for each engine.
michael@0:             for (int i = 0; i < engines.length(); i++) {
michael@0:                 try {
michael@0:                     JSONObject engineJSON = engines.getJSONObject(i);
michael@0:                     final String engineName = engineJSON.getString("name");
michael@0: 
michael@0:                     final SearchEnginePreference enginePreference = new SearchEnginePreference(getContext(), this);
michael@0:                     enginePreference.setSearchEngineFromJSON(engineJSON);
michael@0:                     enginePreference.setOnPreferenceClickListener(new OnPreferenceClickListener() {
michael@0:                         @Override
michael@0:                         public boolean onPreferenceClick(Preference preference) {
michael@0:                             SearchEnginePreference sPref = (SearchEnginePreference) preference;
michael@0:                             // Display the configuration dialog associated with the tapped engine.
michael@0:                             sPref.showDialog();
michael@0:                             return true;
michael@0:                         }
michael@0:                     });
michael@0: 
michael@0:                     addPreference(enginePreference);
michael@0: 
michael@0:                     // The first element in the array is the default engine.
michael@0:                     if (i == 0) {
michael@0:                         // We set this here, not in setSearchEngineFromJSON, because it allows us to
michael@0:                         // keep a reference  to the default engine to use when the AlertDialog
michael@0:                         // callbacks are used.
michael@0:                         ThreadUtils.postToUiThread(new Runnable() {
michael@0:                             @Override
michael@0:                             public void run() {
michael@0:                                 enginePreference.setIsDefault(true);
michael@0:                             }
michael@0:                         });
michael@0:                         mDefaultReference = enginePreference;
michael@0:                     }
michael@0:                 } catch (JSONException e) {
michael@0:                     Log.e(LOGTAG, "JSONException parsing engine at index " + i, e);
michael@0:                 }
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Helper method to send a particular event string to Gecko with an associated engine name.
michael@0:      * @param event The type of event to send.
michael@0:      * @param engine The engine to which the event relates.
michael@0:      */
michael@0:     private void sendGeckoEngineEvent(String event, String engineName) {
michael@0:         JSONObject json = new JSONObject();
michael@0:         try {
michael@0:             json.put("engine", engineName);
michael@0:         } catch (JSONException e) {
michael@0:             Log.e(LOGTAG, "JSONException creating search engine configuration change message for Gecko.", e);
michael@0:             return;
michael@0:         }
michael@0:         GeckoAppShell.notifyGeckoOfEvent(GeckoEvent.createBroadcastEvent(event, json.toString()));
michael@0:     }
michael@0: }