Current Dev State

static/js/ketcher2/node_modules/when/lib/env.js

@@ -0,0 +1,73 @@
+/** @license MIT License (c) copyright 2010-2014 original author or authors */
+/** @author Brian Cavalier */
+/** @author John Hann */
+
+/*global process,document,setTimeout,clearTimeout,MutationObserver,WebKitMutationObserver*/
+(function(define) { 'use strict';
+define(function(require) {
+	/*jshint maxcomplexity:6*/
+
+	// Sniff "best" async scheduling option
+	// Prefer process.nextTick or MutationObserver, then check for
+	// setTimeout, and finally vertx, since its the only env that doesn't
+	// have setTimeout
+
+	var MutationObs;
+	var capturedSetTimeout = typeof setTimeout !== 'undefined' && setTimeout;
+
+	// Default env
+	var setTimer = function(f, ms) { return setTimeout(f, ms); };
+	var clearTimer = function(t) { return clearTimeout(t); };
+	var asap = function (f) { return capturedSetTimeout(f, 0); };
+
+	// Detect specific env
+	if (isNode()) { // Node
+		asap = function (f) { return process.nextTick(f); };
+
+	} else if (MutationObs = hasMutationObserver()) { // Modern browser
+		asap = initMutationObserver(MutationObs);
+
+	} else if (!capturedSetTimeout) { // vert.x
+		var vertxRequire = require;
+		var vertx = vertxRequire('vertx');
+		setTimer = function (f, ms) { return vertx.setTimer(ms, f); };
+		clearTimer = vertx.cancelTimer;
+		asap = vertx.runOnLoop || vertx.runOnContext;
+	}
+
+	return {
+		setTimer: setTimer,
+		clearTimer: clearTimer,
+		asap: asap
+	};
+
+	function isNode () {
+		return typeof process !== 'undefined' &&
+			Object.prototype.toString.call(process) === '[object process]';
+	}
+
+	function hasMutationObserver () {
+	    return (typeof MutationObserver !== 'undefined' && MutationObserver) ||
+			(typeof WebKitMutationObserver !== 'undefined' && WebKitMutationObserver);
+	}
+
+	function initMutationObserver(MutationObserver) {
+		var scheduled;
+		var node = document.createTextNode('');
+		var o = new MutationObserver(run);
+		o.observe(node, { characterData: true });
+
+		function run() {
+			var f = scheduled;
+			scheduled = void 0;
+			f();
+		}
+
+		var i = 0;
+		return function (f) {
+			scheduled = f;
+			node.data = (i ^= 1);
+		};
+	}
+});
+}(typeof define === 'function' && define.amd ? define : function(factory) { module.exports = factory(require); }));