// shim for using process in browser
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var process = module.exports = {};
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// cached from whatever global is present so that test runners that stub it
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// don't break things. But we need to wrap it in a try catch in case it is
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// wrapped in strict mode code which doesn't define any globals. It's inside a
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// function because try/catches deoptimize in certain engines.
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var cachedSetTimeout;
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var cachedClearTimeout;
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function defaultSetTimout() {
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throw new Error('setTimeout has not been defined');
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}
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function defaultClearTimeout () {
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throw new Error('clearTimeout has not been defined');
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}
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(function () {
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try {
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if (typeof setTimeout === 'function') {
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cachedSetTimeout = setTimeout;
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} else {
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cachedSetTimeout = defaultSetTimout;
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}
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} catch (e) {
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cachedSetTimeout = defaultSetTimout;
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}
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try {
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if (typeof clearTimeout === 'function') {
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cachedClearTimeout = clearTimeout;
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} else {
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cachedClearTimeout = defaultClearTimeout;
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}
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} catch (e) {
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cachedClearTimeout = defaultClearTimeout;
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}
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} ())
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function runTimeout(fun) {
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if (cachedSetTimeout === setTimeout) {
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//normal enviroments in sane situations
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return setTimeout(fun, 0);
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}
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// if setTimeout wasn't available but was latter defined
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if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
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cachedSetTimeout = setTimeout;
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return setTimeout(fun, 0);
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}
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try {
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// when when somebody has screwed with setTimeout but no I.E. maddness
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return cachedSetTimeout(fun, 0);
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} catch(e){
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try {
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// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
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return cachedSetTimeout.call(null, fun, 0);
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} catch(e){
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// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
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return cachedSetTimeout.call(this, fun, 0);
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}
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}
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}
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function runClearTimeout(marker) {
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if (cachedClearTimeout === clearTimeout) {
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//normal enviroments in sane situations
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return clearTimeout(marker);
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}
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// if clearTimeout wasn't available but was latter defined
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if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
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cachedClearTimeout = clearTimeout;
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return clearTimeout(marker);
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}
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try {
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// when when somebody has screwed with setTimeout but no I.E. maddness
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return cachedClearTimeout(marker);
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} catch (e){
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try {
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// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
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return cachedClearTimeout.call(null, marker);
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} catch (e){
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// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
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// Some versions of I.E. have different rules for clearTimeout vs setTimeout
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return cachedClearTimeout.call(this, marker);
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}
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}
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}
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var queue = [];
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var draining = false;
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var currentQueue;
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var queueIndex = -1;
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function cleanUpNextTick() {
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if (!draining || !currentQueue) {
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return;
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}
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draining = false;
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if (currentQueue.length) {
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queue = currentQueue.concat(queue);
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} else {
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queueIndex = -1;
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}
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if (queue.length) {
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drainQueue();
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}
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}
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function drainQueue() {
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if (draining) {
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return;
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}
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var timeout = runTimeout(cleanUpNextTick);
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draining = true;
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var len = queue.length;
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while(len) {
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currentQueue = queue;
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queue = [];
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while (++queueIndex < len) {
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if (currentQueue) {
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currentQueue[queueIndex].run();
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}
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}
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queueIndex = -1;
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len = queue.length;
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}
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currentQueue = null;
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draining = false;
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runClearTimeout(timeout);
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}
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process.nextTick = function (fun) {
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var args = new Array(arguments.length - 1);
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if (arguments.length > 1) {
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for (var i = 1; i < arguments.length; i++) {
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args[i - 1] = arguments[i];
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}
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}
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queue.push(new Item(fun, args));
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if (queue.length === 1 && !draining) {
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runTimeout(drainQueue);
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}
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};
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// v8 likes predictible objects
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function Item(fun, array) {
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this.fun = fun;
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this.array = array;
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}
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Item.prototype.run = function () {
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this.fun.apply(null, this.array);
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};
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process.title = 'browser';
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process.browser = true;
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process.env = {};
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process.argv = [];
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process.version = ''; // empty string to avoid regexp issues
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process.versions = {};
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function noop() {}
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process.on = noop;
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process.addListener = noop;
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process.once = noop;
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process.off = noop;
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process.removeListener = noop;
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process.removeAllListeners = noop;
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process.emit = noop;
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process.prependListener = noop;
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process.prependOnceListener = noop;
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process.listeners = function (name) { return [] }
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process.binding = function (name) {
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throw new Error('process.binding is not supported');
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};
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process.cwd = function () { return '/' };
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process.chdir = function (dir) {
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throw new Error('process.chdir is not supported');
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};
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process.umask = function() { return 0; };
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