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: "use strict";
michael@0: 
michael@0: module.metadata = {
michael@0:   "stability": "unstable"
michael@0: };
michael@0: 
michael@0: let { emit } = require("./core");
michael@0: 
michael@0: // Simple utility function takes event target, event type and optional
michael@0: // `options.capture` and returns node style event stream that emits "data"
michael@0: // events every time event of that type occurs on the given `target`.
michael@0: function open(target, type, options) {
michael@0:   let output = {};
michael@0:   let capture = options && options.capture ? true : false;
michael@0: 
michael@0:   target.addEventListener(type, function(event) {
michael@0:     emit(output, "data", event);
michael@0:   }, capture);
michael@0: 
michael@0:   return output;
michael@0: }
michael@0: exports.open = open;