\").appendTo(that.$node);\n return new Dataset(oDataset, www);\n }\n }\n _.mixin(Menu.prototype, EventEmitter, {\n _onSelectableClick: function onSelectableClick($e) {\n this.trigger(\"selectableClicked\", $($e.currentTarget));\n },\n _onRendered: function onRendered(type, dataset, suggestions, async) {\n this.$node.toggleClass(this.classes.empty, this._allDatasetsEmpty());\n this.trigger(\"datasetRendered\", dataset, suggestions, async);\n },\n _onCleared: function onCleared() {\n this.$node.toggleClass(this.classes.empty, this._allDatasetsEmpty());\n this.trigger(\"datasetCleared\");\n },\n _propagate: function propagate() {\n this.trigger.apply(this, arguments);\n },\n _allDatasetsEmpty: function allDatasetsEmpty() {\n return _.every(this.datasets, isDatasetEmpty);\n function isDatasetEmpty(dataset) {\n return dataset.isEmpty();\n }\n },\n _getSelectables: function getSelectables() {\n return this.$node.find(this.selectors.selectable);\n },\n _removeCursor: function _removeCursor() {\n var $selectable = this.getActiveSelectable();\n $selectable && $selectable.removeClass(this.classes.cursor);\n },\n _ensureVisible: function ensureVisible($el) {\n var elTop, elBottom, nodeScrollTop, nodeHeight;\n elTop = $el.position().top;\n elBottom = elTop + $el.outerHeight(true);\n nodeScrollTop = this.$node.scrollTop();\n nodeHeight = this.$node.height() + parseInt(this.$node.css(\"paddingTop\"), 10) + parseInt(this.$node.css(\"paddingBottom\"), 10);\n if (elTop < 0) {\n this.$node.scrollTop(nodeScrollTop + elTop);\n } else if (nodeHeight < elBottom) {\n this.$node.scrollTop(nodeScrollTop + (elBottom - nodeHeight));\n }\n },\n bind: function bind() {\n var that = this,\n onSelectableClick;\n onSelectableClick = _.bind(this._onSelectableClick, this);\n this.$node.on(\"click.tt\", this.selectors.selectable, onSelectableClick);\n _.each(this.datasets, function (dataset) {\n dataset.onSync(\"asyncRequested\", that._propagate, that).onSync(\"asyncCanceled\", that._propagate, that).onSync(\"asyncReceived\", that._propagate, that).onSync(\"rendered\", that._onRendered, that).onSync(\"cleared\", that._onCleared, that);\n });\n return this;\n },\n isOpen: function isOpen() {\n return this.$node.hasClass(this.classes.open);\n },\n open: function open() {\n this.$node.addClass(this.classes.open);\n },\n close: function close() {\n this.$node.removeClass(this.classes.open);\n this._removeCursor();\n },\n setLanguageDirection: function setLanguageDirection(dir) {\n this.$node.attr(\"dir\", dir);\n },\n selectableRelativeToCursor: function selectableRelativeToCursor(delta) {\n var $selectables, $oldCursor, oldIndex, newIndex;\n $oldCursor = this.getActiveSelectable();\n $selectables = this._getSelectables();\n oldIndex = $oldCursor ? $selectables.index($oldCursor) : -1;\n newIndex = oldIndex + delta;\n newIndex = (newIndex + 1) % ($selectables.length + 1) - 1;\n newIndex = newIndex < -1 ? $selectables.length - 1 : newIndex;\n return newIndex === -1 ? null : $selectables.eq(newIndex);\n },\n setCursor: function setCursor($selectable) {\n this._removeCursor();\n if ($selectable = $selectable && $selectable.first()) {\n $selectable.addClass(this.classes.cursor);\n this._ensureVisible($selectable);\n }\n },\n getSelectableData: function getSelectableData($el) {\n return $el && $el.length ? Dataset.extractData($el) : null;\n },\n getActiveSelectable: function getActiveSelectable() {\n var $selectable = this._getSelectables().filter(this.selectors.cursor).first();\n return $selectable.length ? $selectable : null;\n },\n getTopSelectable: function getTopSelectable() {\n var $selectable = this._getSelectables().first();\n return $selectable.length ? $selectable : null;\n },\n update: function update(query) {\n var isValidUpdate = query !== this.query;\n if (isValidUpdate) {\n this.query = query;\n _.each(this.datasets, updateDataset);\n }\n return isValidUpdate;\n function updateDataset(dataset) {\n dataset.update(query);\n }\n },\n empty: function empty() {\n _.each(this.datasets, clearDataset);\n this.query = null;\n this.$node.addClass(this.classes.empty);\n function clearDataset(dataset) {\n dataset.clear();\n }\n },\n destroy: function destroy() {\n this.$node.off(\".tt\");\n this.$node = $(\"
\");\n _.each(this.datasets, destroyDataset);\n function destroyDataset(dataset) {\n dataset.destroy();\n }\n }\n });\n return Menu;\n }();\n var DefaultMenu = function () {\n \"use strict\";\n\n var s = Menu.prototype;\n function DefaultMenu() {\n Menu.apply(this, [].slice.call(arguments, 0));\n }\n _.mixin(DefaultMenu.prototype, Menu.prototype, {\n open: function open() {\n !this._allDatasetsEmpty() && this._show();\n return s.open.apply(this, [].slice.call(arguments, 0));\n },\n close: function close() {\n this._hide();\n return s.close.apply(this, [].slice.call(arguments, 0));\n },\n _onRendered: function onRendered() {\n if (this._allDatasetsEmpty()) {\n this._hide();\n } else {\n this.isOpen() && this._show();\n }\n return s._onRendered.apply(this, [].slice.call(arguments, 0));\n },\n _onCleared: function onCleared() {\n if (this._allDatasetsEmpty()) {\n this._hide();\n } else {\n this.isOpen() && this._show();\n }\n return s._onCleared.apply(this, [].slice.call(arguments, 0));\n },\n setLanguageDirection: function setLanguageDirection(dir) {\n this.$node.css(dir === \"ltr\" ? this.css.ltr : this.css.rtl);\n return s.setLanguageDirection.apply(this, [].slice.call(arguments, 0));\n },\n _hide: function hide() {\n this.$node.hide();\n },\n _show: function show() {\n this.$node.css(\"display\", \"block\");\n }\n });\n return DefaultMenu;\n }();\n var Typeahead = function () {\n \"use strict\";\n\n function Typeahead(o, www) {\n var onFocused, onBlurred, onEnterKeyed, onTabKeyed, onEscKeyed, onUpKeyed, onDownKeyed, onLeftKeyed, onRightKeyed, onQueryChanged, onWhitespaceChanged;\n o = o || {};\n if (!o.input) {\n $.error(\"missing input\");\n }\n if (!o.menu) {\n $.error(\"missing menu\");\n }\n if (!o.eventBus) {\n $.error(\"missing event bus\");\n }\n www.mixin(this);\n this.eventBus = o.eventBus;\n this.minLength = _.isNumber(o.minLength) ? o.minLength : 1;\n this.input = o.input;\n this.menu = o.menu;\n this.enabled = true;\n this.active = false;\n this.input.hasFocus() && this.activate();\n this.dir = this.input.getLangDir();\n this._hacks();\n this.menu.bind().onSync(\"selectableClicked\", this._onSelectableClicked, this).onSync(\"asyncRequested\", this._onAsyncRequested, this).onSync(\"asyncCanceled\", this._onAsyncCanceled, this).onSync(\"asyncReceived\", this._onAsyncReceived, this).onSync(\"datasetRendered\", this._onDatasetRendered, this).onSync(\"datasetCleared\", this._onDatasetCleared, this);\n onFocused = c(this, \"activate\", \"open\", \"_onFocused\");\n onBlurred = c(this, \"deactivate\", \"_onBlurred\");\n onEnterKeyed = c(this, \"isActive\", \"isOpen\", \"_onEnterKeyed\");\n onTabKeyed = c(this, \"isActive\", \"isOpen\", \"_onTabKeyed\");\n onEscKeyed = c(this, \"isActive\", \"_onEscKeyed\");\n onUpKeyed = c(this, \"isActive\", \"open\", \"_onUpKeyed\");\n onDownKeyed = c(this, \"isActive\", \"open\", \"_onDownKeyed\");\n onLeftKeyed = c(this, \"isActive\", \"isOpen\", \"_onLeftKeyed\");\n onRightKeyed = c(this, \"isActive\", \"isOpen\", \"_onRightKeyed\");\n onQueryChanged = c(this, \"_openIfActive\", \"_onQueryChanged\");\n onWhitespaceChanged = c(this, \"_openIfActive\", \"_onWhitespaceChanged\");\n this.input.bind().onSync(\"focused\", onFocused, this).onSync(\"blurred\", onBlurred, this).onSync(\"enterKeyed\", onEnterKeyed, this).onSync(\"tabKeyed\", onTabKeyed, this).onSync(\"escKeyed\", onEscKeyed, this).onSync(\"upKeyed\", onUpKeyed, this).onSync(\"downKeyed\", onDownKeyed, this).onSync(\"leftKeyed\", onLeftKeyed, this).onSync(\"rightKeyed\", onRightKeyed, this).onSync(\"queryChanged\", onQueryChanged, this).onSync(\"whitespaceChanged\", onWhitespaceChanged, this).onSync(\"langDirChanged\", this._onLangDirChanged, this);\n }\n _.mixin(Typeahead.prototype, {\n _hacks: function hacks() {\n var $input, $menu;\n $input = this.input.$input || $(\"
\");\n $menu = this.menu.$node || $(\"
\");\n $input.on(\"blur.tt\", function ($e) {\n var active, isActive, hasActive;\n active = document.activeElement;\n isActive = $menu.is(active);\n hasActive = $menu.has(active).length > 0;\n if (_.isMsie() && (isActive || hasActive)) {\n $e.preventDefault();\n $e.stopImmediatePropagation();\n _.defer(function () {\n $input.focus();\n });\n }\n });\n $menu.on(\"mousedown.tt\", function ($e) {\n $e.preventDefault();\n });\n },\n _onSelectableClicked: function onSelectableClicked(type, $el) {\n this.select($el);\n },\n _onDatasetCleared: function onDatasetCleared() {\n this._updateHint();\n },\n _onDatasetRendered: function onDatasetRendered(type, dataset, suggestions, async) {\n this._updateHint();\n this.eventBus.trigger(\"render\", suggestions, async, dataset);\n },\n _onAsyncRequested: function onAsyncRequested(type, dataset, query) {\n this.eventBus.trigger(\"asyncrequest\", query, dataset);\n },\n _onAsyncCanceled: function onAsyncCanceled(type, dataset, query) {\n this.eventBus.trigger(\"asynccancel\", query, dataset);\n },\n _onAsyncReceived: function onAsyncReceived(type, dataset, query) {\n this.eventBus.trigger(\"asyncreceive\", query, dataset);\n },\n _onFocused: function onFocused() {\n this._minLengthMet() && this.menu.update(this.input.getQuery());\n },\n _onBlurred: function onBlurred() {\n if (this.input.hasQueryChangedSinceLastFocus()) {\n this.eventBus.trigger(\"change\", this.input.getQuery());\n }\n },\n _onEnterKeyed: function onEnterKeyed(type, $e) {\n var $selectable;\n if ($selectable = this.menu.getActiveSelectable()) {\n this.select($selectable) && $e.preventDefault();\n }\n },\n _onTabKeyed: function onTabKeyed(type, $e) {\n var $selectable;\n if ($selectable = this.menu.getActiveSelectable()) {\n this.select($selectable) && $e.preventDefault();\n } else if ($selectable = this.menu.getTopSelectable()) {\n this.autocomplete($selectable) && $e.preventDefault();\n }\n },\n _onEscKeyed: function onEscKeyed() {\n this.close();\n },\n _onUpKeyed: function onUpKeyed() {\n this.moveCursor(-1);\n },\n _onDownKeyed: function onDownKeyed() {\n this.moveCursor(+1);\n },\n _onLeftKeyed: function onLeftKeyed() {\n if (this.dir === \"rtl\" && this.input.isCursorAtEnd()) {\n this.autocomplete(this.menu.getTopSelectable());\n }\n },\n _onRightKeyed: function onRightKeyed() {\n if (this.dir === \"ltr\" && this.input.isCursorAtEnd()) {\n this.autocomplete(this.menu.getTopSelectable());\n }\n },\n _onQueryChanged: function onQueryChanged(e, query) {\n this._minLengthMet(query) ? this.menu.update(query) : this.menu.empty();\n },\n _onWhitespaceChanged: function onWhitespaceChanged() {\n this._updateHint();\n },\n _onLangDirChanged: function onLangDirChanged(e, dir) {\n if (this.dir !== dir) {\n this.dir = dir;\n this.menu.setLanguageDirection(dir);\n }\n },\n _openIfActive: function openIfActive() {\n this.isActive() && this.open();\n },\n _minLengthMet: function minLengthMet(query) {\n query = _.isString(query) ? query : this.input.getQuery() || \"\";\n return query.length >= this.minLength;\n },\n _updateHint: function updateHint() {\n var $selectable, data, val, query, escapedQuery, frontMatchRegEx, match;\n $selectable = this.menu.getTopSelectable();\n data = this.menu.getSelectableData($selectable);\n val = this.input.getInputValue();\n if (data && !_.isBlankString(val) && !this.input.hasOverflow()) {\n query = Input.normalizeQuery(val);\n escapedQuery = _.escapeRegExChars(query);\n frontMatchRegEx = new RegExp(\"^(?:\" + escapedQuery + \")(.+$)\", \"i\");\n match = frontMatchRegEx.exec(data.val);\n match && this.input.setHint(val + match[1]);\n } else {\n this.input.clearHint();\n }\n },\n isEnabled: function isEnabled() {\n return this.enabled;\n },\n enable: function enable() {\n this.enabled = true;\n },\n disable: function disable() {\n this.enabled = false;\n },\n isActive: function isActive() {\n return this.active;\n },\n activate: function activate() {\n if (this.isActive()) {\n return true;\n } else if (!this.isEnabled() || this.eventBus.before(\"active\")) {\n return false;\n } else {\n this.active = true;\n this.eventBus.trigger(\"active\");\n return true;\n }\n },\n deactivate: function deactivate() {\n if (!this.isActive()) {\n return true;\n } else if (this.eventBus.before(\"idle\")) {\n return false;\n } else {\n this.active = false;\n this.close();\n this.eventBus.trigger(\"idle\");\n return true;\n }\n },\n isOpen: function isOpen() {\n return this.menu.isOpen();\n },\n open: function open() {\n if (!this.isOpen() && !this.eventBus.before(\"open\")) {\n this.menu.open();\n this._updateHint();\n this.eventBus.trigger(\"open\");\n }\n return this.isOpen();\n },\n close: function close() {\n if (this.isOpen() && !this.eventBus.before(\"close\")) {\n this.menu.close();\n this.input.clearHint();\n this.input.resetInputValue();\n this.eventBus.trigger(\"close\");\n }\n return !this.isOpen();\n },\n setVal: function setVal(val) {\n this.input.setQuery(_.toStr(val));\n },\n getVal: function getVal() {\n return this.input.getQuery();\n },\n select: function select($selectable) {\n var data = this.menu.getSelectableData($selectable);\n if (data && !this.eventBus.before(\"select\", data.obj)) {\n this.input.setQuery(data.val, true);\n this.eventBus.trigger(\"select\", data.obj);\n this.close();\n return true;\n }\n return false;\n },\n autocomplete: function autocomplete($selectable) {\n var query, data, isValid;\n query = this.input.getQuery();\n data = this.menu.getSelectableData($selectable);\n isValid = data && query !== data.val;\n if (isValid && !this.eventBus.before(\"autocomplete\", data.obj)) {\n this.input.setQuery(data.val);\n this.eventBus.trigger(\"autocomplete\", data.obj);\n return true;\n }\n return false;\n },\n moveCursor: function moveCursor(delta) {\n var query, $candidate, data, payload, cancelMove;\n query = this.input.getQuery();\n $candidate = this.menu.selectableRelativeToCursor(delta);\n data = this.menu.getSelectableData($candidate);\n payload = data ? data.obj : null;\n cancelMove = this._minLengthMet() && this.menu.update(query);\n if (!cancelMove && !this.eventBus.before(\"cursorchange\", payload)) {\n this.menu.setCursor($candidate);\n if (data) {\n this.input.setInputValue(data.val);\n } else {\n this.input.resetInputValue();\n this._updateHint();\n }\n this.eventBus.trigger(\"cursorchange\", payload);\n return true;\n }\n return false;\n },\n destroy: function destroy() {\n this.input.destroy();\n this.menu.destroy();\n }\n });\n return Typeahead;\n function c(ctx) {\n var methods = [].slice.call(arguments, 1);\n return function () {\n var args = [].slice.call(arguments);\n _.each(methods, function (method) {\n return ctx[method].apply(ctx, args);\n });\n };\n }\n }();\n (function () {\n \"use strict\";\n\n var old, keys, methods;\n old = $.fn.typeahead;\n keys = {\n www: \"tt-www\",\n attrs: \"tt-attrs\",\n typeahead: \"tt-typeahead\"\n };\n methods = {\n initialize: function initialize(o, datasets) {\n var www;\n datasets = _.isArray(datasets) ? datasets : [].slice.call(arguments, 1);\n o = o || {};\n www = WWW(o.classNames);\n return this.each(attach);\n function attach() {\n var $input, $wrapper, $hint, $menu, defaultHint, defaultMenu, eventBus, input, menu, typeahead, MenuConstructor;\n _.each(datasets, function (d) {\n d.highlight = !!o.highlight;\n });\n $input = $(this);\n $wrapper = $(www.html.wrapper);\n $hint = $elOrNull(o.hint);\n $menu = $elOrNull(o.menu);\n defaultHint = o.hint !== false && !$hint;\n defaultMenu = o.menu !== false && !$menu;\n defaultHint && ($hint = buildHintFromInput($input, www));\n defaultMenu && ($menu = $(www.html.menu).css(www.css.menu));\n $hint && $hint.val(\"\");\n $input = prepInput($input, www);\n if (defaultHint || defaultMenu) {\n $wrapper.css(www.css.wrapper);\n $input.css(defaultHint ? www.css.input : www.css.inputWithNoHint);\n $input.wrap($wrapper).parent().prepend(defaultHint ? $hint : null).append(defaultMenu ? $menu : null);\n }\n MenuConstructor = defaultMenu ? DefaultMenu : Menu;\n eventBus = new EventBus({\n el: $input\n });\n input = new Input({\n hint: $hint,\n input: $input\n }, www);\n menu = new MenuConstructor({\n node: $menu,\n datasets: datasets\n }, www);\n typeahead = new Typeahead({\n input: input,\n menu: menu,\n eventBus: eventBus,\n minLength: o.minLength\n }, www);\n $input.data(keys.www, www);\n $input.data(keys.typeahead, typeahead);\n }\n },\n isEnabled: function isEnabled() {\n var enabled;\n ttEach(this.first(), function (t) {\n enabled = t.isEnabled();\n });\n return enabled;\n },\n enable: function enable() {\n ttEach(this, function (t) {\n t.enable();\n });\n return this;\n },\n disable: function disable() {\n ttEach(this, function (t) {\n t.disable();\n });\n return this;\n },\n isActive: function isActive() {\n var active;\n ttEach(this.first(), function (t) {\n active = t.isActive();\n });\n return active;\n },\n activate: function activate() {\n ttEach(this, function (t) {\n t.activate();\n });\n return this;\n },\n deactivate: function deactivate() {\n ttEach(this, function (t) {\n t.deactivate();\n });\n return this;\n },\n isOpen: function isOpen() {\n var open;\n ttEach(this.first(), function (t) {\n open = t.isOpen();\n });\n return open;\n },\n open: function open() {\n ttEach(this, function (t) {\n t.open();\n });\n return this;\n },\n close: function close() {\n ttEach(this, function (t) {\n t.close();\n });\n return this;\n },\n select: function select(el) {\n var success = false,\n $el = $(el);\n ttEach(this.first(), function (t) {\n success = t.select($el);\n });\n return success;\n },\n autocomplete: function autocomplete(el) {\n var success = false,\n $el = $(el);\n ttEach(this.first(), function (t) {\n success = t.autocomplete($el);\n });\n return success;\n },\n moveCursor: function moveCursoe(delta) {\n var success = false;\n ttEach(this.first(), function (t) {\n success = t.moveCursor(delta);\n });\n return success;\n },\n val: function val(newVal) {\n var query;\n if (!arguments.length) {\n ttEach(this.first(), function (t) {\n query = t.getVal();\n });\n return query;\n } else {\n ttEach(this, function (t) {\n t.setVal(newVal);\n });\n return this;\n }\n },\n destroy: function destroy() {\n ttEach(this, function (typeahead, $input) {\n revert($input);\n typeahead.destroy();\n });\n return this;\n }\n };\n $.fn.typeahead = function (method) {\n if (methods[method]) {\n return methods[method].apply(this, [].slice.call(arguments, 1));\n } else {\n return methods.initialize.apply(this, arguments);\n }\n };\n $.fn.typeahead.noConflict = function noConflict() {\n $.fn.typeahead = old;\n return this;\n };\n function ttEach($els, fn) {\n $els.each(function () {\n var $input = $(this),\n typeahead;\n (typeahead = $input.data(keys.typeahead)) && fn(typeahead, $input);\n });\n }\n function buildHintFromInput($input, www) {\n return $input.clone().addClass(www.classes.hint).removeData().css(www.css.hint).css(getBackgroundStyles($input)).prop(\"readonly\", true).removeAttr(\"id name placeholder required\").attr({\n autocomplete: \"off\",\n spellcheck: \"false\",\n tabindex: -1\n });\n }\n function prepInput($input, www) {\n $input.data(keys.attrs, {\n dir: $input.attr(\"dir\"),\n autocomplete: $input.attr(\"autocomplete\"),\n spellcheck: $input.attr(\"spellcheck\"),\n style: $input.attr(\"style\")\n });\n $input.addClass(www.classes.input).attr({\n autocomplete: \"off\",\n spellcheck: false\n });\n try {\n !$input.attr(\"dir\") && $input.attr(\"dir\", \"auto\");\n } catch (e) {}\n return $input;\n }\n function getBackgroundStyles($el) {\n return {\n backgroundAttachment: $el.css(\"background-attachment\"),\n backgroundClip: $el.css(\"background-clip\"),\n backgroundColor: $el.css(\"background-color\"),\n backgroundImage: $el.css(\"background-image\"),\n backgroundOrigin: $el.css(\"background-origin\"),\n backgroundPosition: $el.css(\"background-position\"),\n backgroundRepeat: $el.css(\"background-repeat\"),\n backgroundSize: $el.css(\"background-size\")\n };\n }\n function revert($input) {\n var www, $wrapper;\n www = $input.data(keys.www);\n $wrapper = $input.parent().filter(www.selectors.wrapper);\n _.each($input.data(keys.attrs), function (val, key) {\n _.isUndefined(val) ? $input.removeAttr(key) : $input.attr(key, val);\n });\n $input.removeData(keys.typeahead).removeData(keys.www).removeData(keys.attr).removeClass(www.classes.input);\n if ($wrapper.length) {\n $input.detach().insertAfter($wrapper);\n $wrapper.remove();\n }\n }\n function $elOrNull(obj) {\n var isValid, $el;\n isValid = _.isJQuery(obj) || _.isElement(obj);\n $el = isValid ? $(obj).first() : [];\n return $el.length ? $el : null;\n }\n })();\n});","(function (global, undefined) {\n \"use strict\";\n\n if (global.setImmediate) {\n return;\n }\n var nextHandle = 1; // Spec says greater than zero\n var tasksByHandle = {};\n var currentlyRunningATask = false;\n var doc = global.document;\n var registerImmediate;\n function setImmediate(callback) {\n // Callback can either be a function or a string\n if (typeof callback !== \"function\") {\n callback = new Function(\"\" + callback);\n }\n // Copy function arguments\n var args = new Array(arguments.length - 1);\n for (var i = 0; i < args.length; i++) {\n args[i] = arguments[i + 1];\n }\n // Store and register the task\n var task = {\n callback: callback,\n args: args\n };\n tasksByHandle[nextHandle] = task;\n registerImmediate(nextHandle);\n return nextHandle++;\n }\n function clearImmediate(handle) {\n delete tasksByHandle[handle];\n }\n function run(task) {\n var callback = task.callback;\n var args = task.args;\n switch (args.length) {\n case 0:\n callback();\n break;\n case 1:\n callback(args[0]);\n break;\n case 2:\n callback(args[0], args[1]);\n break;\n case 3:\n callback(args[0], args[1], args[2]);\n break;\n default:\n callback.apply(undefined, args);\n break;\n }\n }\n function runIfPresent(handle) {\n // From the spec: \"Wait until any invocations of this algorithm started before this one have completed.\"\n // So if we're currently running a task, we'll need to delay this invocation.\n if (currentlyRunningATask) {\n // Delay by doing a setTimeout. setImmediate was tried instead, but in Firefox 7 it generated a\n // \"too much recursion\" error.\n setTimeout(runIfPresent, 0, handle);\n } else {\n var task = tasksByHandle[handle];\n if (task) {\n currentlyRunningATask = true;\n try {\n run(task);\n } finally {\n clearImmediate(handle);\n currentlyRunningATask = false;\n }\n }\n }\n }\n function installNextTickImplementation() {\n registerImmediate = function registerImmediate(handle) {\n process.nextTick(function () {\n runIfPresent(handle);\n });\n };\n }\n function canUsePostMessage() {\n // The test against `importScripts` prevents this implementation from being installed inside a web worker,\n // where `global.postMessage` means something completely different and can't be used for this purpose.\n if (global.postMessage && !global.importScripts) {\n var postMessageIsAsynchronous = true;\n var oldOnMessage = global.onmessage;\n global.onmessage = function () {\n postMessageIsAsynchronous = false;\n };\n global.postMessage(\"\", \"*\");\n global.onmessage = oldOnMessage;\n return postMessageIsAsynchronous;\n }\n }\n function installPostMessageImplementation() {\n // Installs an event handler on `global` for the `message` event: see\n // * https://developer.mozilla.org/en/DOM/window.postMessage\n // * http://www.whatwg.org/specs/web-apps/current-work/multipage/comms.html#crossDocumentMessages\n\n var messagePrefix = \"setImmediate$\" + Math.random() + \"$\";\n var onGlobalMessage = function onGlobalMessage(event) {\n if (event.source === global && typeof event.data === \"string\" && event.data.indexOf(messagePrefix) === 0) {\n runIfPresent(+event.data.slice(messagePrefix.length));\n }\n };\n if (global.addEventListener) {\n global.addEventListener(\"message\", onGlobalMessage, false);\n } else {\n global.attachEvent(\"onmessage\", onGlobalMessage);\n }\n registerImmediate = function registerImmediate(handle) {\n global.postMessage(messagePrefix + handle, \"*\");\n };\n }\n function installMessageChannelImplementation() {\n var channel = new MessageChannel();\n channel.port1.onmessage = function (event) {\n var handle = event.data;\n runIfPresent(handle);\n };\n registerImmediate = function registerImmediate(handle) {\n channel.port2.postMessage(handle);\n };\n }\n function installReadyStateChangeImplementation() {\n var html = doc.documentElement;\n registerImmediate = function registerImmediate(handle) {\n // Create a