1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/base/home/PanelInfoManager.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,159 @@
1.4 +/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +package org.mozilla.gecko.home;
1.10 +
1.11 +import java.util.ArrayList;
1.12 +import java.util.List;
1.13 +import java.util.Set;
1.14 +import java.util.concurrent.atomic.AtomicInteger;
1.15 +
1.16 +import org.json.JSONArray;
1.17 +import org.json.JSONException;
1.18 +import org.json.JSONObject;
1.19 +import org.mozilla.gecko.GeckoAppShell;
1.20 +import org.mozilla.gecko.GeckoEvent;
1.21 +import org.mozilla.gecko.home.HomeConfig.PanelConfig;
1.22 +import org.mozilla.gecko.util.GeckoEventListener;
1.23 +import org.mozilla.gecko.util.ThreadUtils;
1.24 +
1.25 +import android.util.Log;
1.26 +import android.util.SparseArray;
1.27 +
1.28 +public class PanelInfoManager implements GeckoEventListener {
1.29 + private static final String LOGTAG = "GeckoPanelInfoManager";
1.30 +
1.31 + public class PanelInfo {
1.32 + private final String mId;
1.33 + private final String mTitle;
1.34 + private final JSONObject mJSONData;
1.35 +
1.36 + public PanelInfo(String id, String title, JSONObject jsonData) {
1.37 + mId = id;
1.38 + mTitle = title;
1.39 + mJSONData = jsonData;
1.40 + }
1.41 +
1.42 + public String getId() {
1.43 + return mId;
1.44 + }
1.45 +
1.46 + public String getTitle() {
1.47 + return mTitle;
1.48 + }
1.49 +
1.50 + public PanelConfig toPanelConfig() {
1.51 + try {
1.52 + return new PanelConfig(mJSONData);
1.53 + } catch (Exception e) {
1.54 + Log.e(LOGTAG, "Failed to convert PanelInfo to PanelConfig", e);
1.55 + return null;
1.56 + }
1.57 + }
1.58 + }
1.59 +
1.60 + public interface RequestCallback {
1.61 + public void onComplete(List<PanelInfo> panelInfos);
1.62 + }
1.63 +
1.64 + private static AtomicInteger sRequestId = new AtomicInteger(0);
1.65 +
1.66 + // Stores set of pending request callbacks.
1.67 + private static final SparseArray<RequestCallback> sCallbacks = new SparseArray<RequestCallback>();
1.68 +
1.69 + /**
1.70 + * Asynchronously fetches list of available panels from Gecko
1.71 + * for the given IDs.
1.72 + *
1.73 + * @param ids list of panel ids to be fetched. A null value will fetch all
1.74 + * available panels.
1.75 + * @param callback onComplete will be called on the UI thread.
1.76 + */
1.77 + public void requestPanelsById(Set<String> ids, RequestCallback callback) {
1.78 + final int requestId = sRequestId.getAndIncrement();
1.79 +
1.80 + synchronized(sCallbacks) {
1.81 + // If there are no pending callbacks, register the event listener.
1.82 + if (sCallbacks.size() == 0) {
1.83 + GeckoAppShell.getEventDispatcher().registerEventListener("HomePanels:Data", this);
1.84 + }
1.85 + sCallbacks.put(requestId, callback);
1.86 + }
1.87 +
1.88 + final JSONObject message = new JSONObject();
1.89 + try {
1.90 + message.put("requestId", requestId);
1.91 +
1.92 + if (ids != null && ids.size() > 0) {
1.93 + JSONArray idsArray = new JSONArray();
1.94 + for (String id : ids) {
1.95 + idsArray.put(id);
1.96 + }
1.97 +
1.98 + message.put("ids", idsArray);
1.99 + }
1.100 + } catch (JSONException e) {
1.101 + Log.e(LOGTAG, "Failed to build event to request panels by id", e);
1.102 + return;
1.103 + }
1.104 +
1.105 + GeckoAppShell.sendEventToGecko(GeckoEvent.createBroadcastEvent("HomePanels:Get", message.toString()));
1.106 + }
1.107 +
1.108 + /**
1.109 + * Asynchronously fetches list of available panels from Gecko.
1.110 + *
1.111 + * @param callback onComplete will be called on the UI thread.
1.112 + */
1.113 + public void requestAvailablePanels(RequestCallback callback) {
1.114 + requestPanelsById(null, callback);
1.115 + }
1.116 +
1.117 + /**
1.118 + * Handles "HomePanels:Data" events.
1.119 + */
1.120 + @Override
1.121 + public void handleMessage(String event, JSONObject message) {
1.122 + final ArrayList<PanelInfo> panelInfos = new ArrayList<PanelInfo>();
1.123 +
1.124 + try {
1.125 + final JSONArray panels = message.getJSONArray("panels");
1.126 + final int count = panels.length();
1.127 + for (int i = 0; i < count; i++) {
1.128 + final PanelInfo panelInfo = getPanelInfoFromJSON(panels.getJSONObject(i));
1.129 + panelInfos.add(panelInfo);
1.130 + }
1.131 +
1.132 + final RequestCallback callback;
1.133 + final int requestId = message.getInt("requestId");
1.134 +
1.135 + synchronized(sCallbacks) {
1.136 + callback = sCallbacks.get(requestId);
1.137 + sCallbacks.delete(requestId);
1.138 +
1.139 + // Unregister the event listener if there are no more pending callbacks.
1.140 + if (sCallbacks.size() == 0) {
1.141 + GeckoAppShell.getEventDispatcher().unregisterEventListener("HomePanels:Data", this);
1.142 + }
1.143 + }
1.144 +
1.145 + ThreadUtils.postToUiThread(new Runnable() {
1.146 + @Override
1.147 + public void run() {
1.148 + callback.onComplete(panelInfos);
1.149 + }
1.150 + });
1.151 + } catch (JSONException e) {
1.152 + Log.e(LOGTAG, "Exception handling " + event + " message", e);
1.153 + }
1.154 + }
1.155 +
1.156 + private PanelInfo getPanelInfoFromJSON(JSONObject jsonPanelInfo) throws JSONException {
1.157 + final String id = jsonPanelInfo.getString("id");
1.158 + final String title = jsonPanelInfo.getString("title");
1.159 +
1.160 + return new PanelInfo(id, title, jsonPanelInfo);
1.161 + }
1.162 +}
