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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko;
import org.mozilla.gecko.util.EventDispatcher;
import org.mozilla.gecko.util.GeckoEventListener;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
/**
* Helper class to send Android Ordered Broadcasts.
*/
public final class OrderedBroadcastHelper
implements GeckoEventListener
{
public static final String LOGTAG = "GeckoOrdBroadcast";
public static final String SEND_EVENT = "OrderedBroadcast:Send";
protected final Context mContext;
public OrderedBroadcastHelper(Context context) {
mContext = context;
EventDispatcher dispatcher = GeckoAppShell.getEventDispatcher();
if (dispatcher == null) {
Log.e(LOGTAG, "Gecko event dispatcher must not be null", new RuntimeException());
return;
}
dispatcher.registerEventListener(SEND_EVENT, this);
}
public synchronized void uninit() {
EventDispatcher dispatcher = GeckoAppShell.getEventDispatcher();
if (dispatcher == null) {
Log.e(LOGTAG, "Gecko event dispatcher must not be null", new RuntimeException());
return;
}
dispatcher.unregisterEventListener(SEND_EVENT, this);
}
@Override
public void handleMessage(String event, JSONObject message) {
if (!SEND_EVENT.equals(event)) {
Log.e(LOGTAG, "OrderedBroadcastHelper got unexpected message " + event);
return;
}
try {
final String action = message.getString("action");
if (action == null) {
Log.e(LOGTAG, "action must not be null");
return;
}
final String responseEvent = message.getString("responseEvent");
if (responseEvent == null) {
Log.e(LOGTAG, "responseEvent must not be null");
return;
}
// It's fine if the caller-provided token is missing or null.
final Object token = (message.has("token") && !message.isNull("token")) ?
message.getJSONObject("token") : null;
// And a missing or null permission means no permission.
final String permission = (message.has("permission") && !message.isNull("permission")) ?
message.getString("permission") : null;
final BroadcastReceiver resultReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
int code = getResultCode();
if (code == Activity.RESULT_OK) {
String data = getResultData();
JSONObject res = new JSONObject();
try {
res.put("action", action);
res.put("token", token);
res.put("data", data);
} catch (JSONException e) {
Log.e(LOGTAG, "Got exception in onReceive handling action " + action, e);
return;
}
GeckoEvent event = GeckoEvent.createBroadcastEvent(responseEvent, res.toString());
GeckoAppShell.sendEventToGecko(event);
}
}
};
Intent intent = new Intent(action);
mContext.sendOrderedBroadcast(intent,
permission,
resultReceiver,
null,
Activity.RESULT_OK,
null,
null);
} catch (JSONException e) {
Log.e(LOGTAG, "Got exception in handleMessage handling event " + event, e);
return;
}
}
}
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