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 file,
michael@0: * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: 'use strict';
michael@0: 
michael@0: const Cc = Components.classes;
michael@0: const Ci = Components.interfaces;
michael@0: 
michael@0: // use ppmm to handle file-picker message.
michael@0: let ppmm = Cc['@mozilla.org/parentprocessmessagemanager;1']
michael@0:              .getService(Ci.nsIMessageListenerManager);
michael@0: 
michael@0: let pickResult = null;
michael@0: 
michael@0: function processPickMessage(message) {
michael@0:   let sender = message.target.QueryInterface(Ci.nsIMessageSender);
michael@0:   // reply FilePicker's message
michael@0:   sender.sendAsyncMessage('file-picked', pickResult);
michael@0:   // notify caller
michael@0:   sendAsyncMessage('file-picked-posted', { type: 'file-picked-posted' });
michael@0: }
michael@0: 
michael@0: function updatePickResult(result) {
michael@0:   pickResult = result;
michael@0:   sendAsyncMessage('pick-result-updated', { type: 'pick-result-updated' });
michael@0: }
michael@0: 
michael@0: ppmm.addMessageListener('file-picker', processPickMessage);
michael@0: // use update-pick-result to change the expected pick result.
michael@0: addMessageListener('update-pick-result', updatePickResult);