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69 lines
2.1 KiB
JavaScript
69 lines
2.1 KiB
JavaScript
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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this.EXPORTED_SYMBOLS = ["ContentRequestHelper"];
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const { interfaces: Ci, utils: Cu } = Components;
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Promise.jsm");
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XPCOMUtils.defineLazyServiceGetter(this, "uuidgen",
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"@mozilla.org/uuid-generator;1",
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"nsIUUIDGenerator");
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XPCOMUtils.defineLazyModuleGetter(this, "SystemAppProxy",
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"resource://gre/modules/SystemAppProxy.jsm");
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function debug(msg) {
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// dump("ContentRequestHelper ** " + msg + "\n");
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}
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this.ContentRequestHelper = function() {
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}
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ContentRequestHelper.prototype = {
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contentRequest: function(aContentEventName, aChromeEventName,
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aInternalEventName, aData) {
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let deferred = Promise.defer();
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let id = uuidgen.generateUUID().toString();
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SystemAppProxy.addEventListener(aContentEventName,
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function onContentEvent(result) {
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SystemAppProxy.removeEventListener(aContentEventName,
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onContentEvent);
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let msg = result.detail;
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if (!msg || !msg.id || msg.id != id) {
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deferred.reject("InternalErrorWrongContentEvent " +
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JSON.stringify(msg));
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SystemAppProxy.removeEventListener(aContentEventName,
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onContentEvent);
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return;
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}
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debug("Got content event " + JSON.stringify(msg));
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if (msg.error) {
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deferred.reject(msg.error);
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} else {
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deferred.resolve(msg.result);
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}
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});
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let detail = {
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eventName: aInternalEventName,
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id: id,
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data: aData
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};
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debug("Send chrome event " + JSON.stringify(detail));
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SystemAppProxy._sendCustomEvent(aChromeEventName, detail);
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return deferred.promise;
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}
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};
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