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Diffstat (limited to 'node_modules/setimmediate/setImmediate.js')
| -rw-r--r-- | node_modules/setimmediate/setImmediate.js | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/node_modules/setimmediate/setImmediate.js b/node_modules/setimmediate/setImmediate.js deleted file mode 100644 index 3c1b06e..0000000 --- a/node_modules/setimmediate/setImmediate.js +++ /dev/null @@ -1,186 +0,0 @@ -(function (global, undefined) { - "use strict"; - - if (global.setImmediate) { - return; - } - - var nextHandle = 1; // Spec says greater than zero - var tasksByHandle = {}; - var currentlyRunningATask = false; - var doc = global.document; - var registerImmediate; - - function setImmediate(callback) { - // Callback can either be a function or a string - if (typeof callback !== "function") { - callback = new Function("" + callback); - } - // Copy function arguments - var args = new Array(arguments.length - 1); - for (var i = 0; i < args.length; i++) { - args[i] = arguments[i + 1]; - } - // Store and register the task - var task = { callback: callback, args: args }; - tasksByHandle[nextHandle] = task; - registerImmediate(nextHandle); - return nextHandle++; - } - - function clearImmediate(handle) { - delete tasksByHandle[handle]; - } - - function run(task) { - var callback = task.callback; - var args = task.args; - switch (args.length) { - case 0: - callback(); - break; - case 1: - callback(args[0]); - break; - case 2: - callback(args[0], args[1]); - break; - case 3: - callback(args[0], args[1], args[2]); - break; - default: - callback.apply(undefined, args); - break; - } - } - - function runIfPresent(handle) { - // From the spec: "Wait until any invocations of this algorithm started before this one have completed." - // So if we're currently running a task, we'll need to delay this invocation. - if (currentlyRunningATask) { - // Delay by doing a setTimeout. setImmediate was tried instead, but in Firefox 7 it generated a - // "too much recursion" error. - setTimeout(runIfPresent, 0, handle); - } else { - var task = tasksByHandle[handle]; - if (task) { - currentlyRunningATask = true; - try { - run(task); - } finally { - clearImmediate(handle); - currentlyRunningATask = false; - } - } - } - } - - function installNextTickImplementation() { - registerImmediate = function(handle) { - process.nextTick(function () { runIfPresent(handle); }); - }; - } - - function canUsePostMessage() { - // The test against `importScripts` prevents this implementation from being installed inside a web worker, - // where `global.postMessage` means something completely different and can't be used for this purpose. - if (global.postMessage && !global.importScripts) { - var postMessageIsAsynchronous = true; - var oldOnMessage = global.onmessage; - global.onmessage = function() { - postMessageIsAsynchronous = false; - }; - global.postMessage("", "*"); - global.onmessage = oldOnMessage; - return postMessageIsAsynchronous; - } - } - - function installPostMessageImplementation() { - // Installs an event handler on `global` for the `message` event: see - // * https://developer.mozilla.org/en/DOM/window.postMessage - // * http://www.whatwg.org/specs/web-apps/current-work/multipage/comms.html#crossDocumentMessages - - var messagePrefix = "setImmediate$" + Math.random() + "$"; - var onGlobalMessage = function(event) { - if (event.source === global && - typeof event.data === "string" && - event.data.indexOf(messagePrefix) === 0) { - runIfPresent(+event.data.slice(messagePrefix.length)); - } - }; - - if (global.addEventListener) { - global.addEventListener("message", onGlobalMessage, false); - } else { - global.attachEvent("onmessage", onGlobalMessage); - } - - registerImmediate = function(handle) { - global.postMessage(messagePrefix + handle, "*"); - }; - } - - function installMessageChannelImplementation() { - var channel = new MessageChannel(); - channel.port1.onmessage = function(event) { - var handle = event.data; - runIfPresent(handle); - }; - - registerImmediate = function(handle) { - channel.port2.postMessage(handle); - }; - } - - function installReadyStateChangeImplementation() { - var html = doc.documentElement; - registerImmediate = function(handle) { - // Create a <script> element; its readystatechange event will be fired asynchronously once it is inserted - // into the document. Do so, thus queuing up the task. Remember to clean up once it's been called. - var script = doc.createElement("script"); - script.onreadystatechange = function () { - runIfPresent(handle); - script.onreadystatechange = null; - html.removeChild(script); - script = null; - }; - html.appendChild(script); - }; - } - - function installSetTimeoutImplementation() { - registerImmediate = function(handle) { - setTimeout(runIfPresent, 0, handle); - }; - } - - // If supported, we should attach to the prototype of global, since that is where setTimeout et al. live. - var attachTo = Object.getPrototypeOf && Object.getPrototypeOf(global); - attachTo = attachTo && attachTo.setTimeout ? attachTo : global; - - // Don't get fooled by e.g. browserify environments. - if ({}.toString.call(global.process) === "[object process]") { - // For Node.js before 0.9 - installNextTickImplementation(); - - } else if (canUsePostMessage()) { - // For non-IE10 modern browsers - installPostMessageImplementation(); - - } else if (global.MessageChannel) { - // For web workers, where supported - installMessageChannelImplementation(); - - } else if (doc && "onreadystatechange" in doc.createElement("script")) { - // For IE 6–8 - installReadyStateChangeImplementation(); - - } else { - // For older browsers - installSetTimeoutImplementation(); - } - - attachTo.setImmediate = setImmediate; - attachTo.clearImmediate = clearImmediate; -}(typeof self === "undefined" ? typeof global === "undefined" ? this : global : self)); |