// Knockout JavaScript library v1.3.0ctp // (c) Steven Sanderson - http://knockoutjs.com/ // License: MIT (http://www.opensource.org/licenses/mit-license.php) (function(window,undefined){ var ko = window["ko"] = {}; // Google Closure Compiler helpers (used only to make the minified file smaller) ko.exportSymbol = function(publicPath, object) { var tokens = publicPath.split("."); var target = window; for (var i = 0; i < tokens.length - 1; i++) target = target[tokens[i]]; target[tokens[tokens.length - 1]] = object; }; ko.exportProperty = function(owner, publicName, object) { owner[publicName] = object; }; ko.utils = new (function () { var stringTrimRegex = /^(\s|\u00A0)+|(\s|\u00A0)+$/g; var isIe6 = /MSIE 6/i.test(navigator.userAgent); var isIe7 = /MSIE 7/i.test(navigator.userAgent); var knownMouseEvents = { "click" : 1, "dblclick" : 1, "mousedown" : 1, "mouseup" : 1, "mousemove" : 1, "mouseover" : 1, "mouseout" : 1, "mouseenter" : 1, "mouseleave" : 1 }; function isClickOnCheckableElement(element, eventType) { if ((element.tagName != "INPUT") || !element.type) return false; if (eventType.toLowerCase() != "click") return false; var inputType = element.type.toLowerCase(); return (inputType == "checkbox") || (inputType == "radio"); } return { fieldsIncludedWithJsonPost: ['authenticity_token', /^__RequestVerificationToken(_.*)?$/], arrayForEach: function (array, action) { for (var i = 0, j = array.length; i < j; i++) action(array[i]); }, arrayIndexOf: function (array, item) { if (typeof array.indexOf == "function") return array.indexOf(item); for (var i = 0, j = array.length; i < j; i++) if (array[i] === item) return i; return -1; }, arrayFirst: function (array, predicate, predicateOwner) { for (var i = 0, j = array.length; i < j; i++) if (predicate.call(predicateOwner, array[i])) return array[i]; return null; }, arrayRemoveItem: function (array, itemToRemove) { var index = ko.utils.arrayIndexOf(array, itemToRemove); if (index >= 0) array.splice(index, 1); }, arrayMap: function (array, mapping) { array = array || []; var result = []; for (var i = 0, j = array.length; i < j; i++) result.push(mapping(array[i])); return result; }, arrayFilter: function (array, predicate) { array = array || []; var result = []; for (var i = 0, j = array.length; i < j; i++) if (predicate(array[i])) result.push(array[i]); return result; }, arrayPushAll: function (array, valuesToPush) { for (var i = 0, j = valuesToPush.length; i < j; i++) array.push(valuesToPush[i]); return array; }, emptyDomNode: function (domNode) { while (domNode.firstChild) { ko.removeNode(domNode.firstChild); } }, setDomNodeChildren: function (domNode, childNodes) { ko.utils.emptyDomNode(domNode); if (childNodes) { ko.utils.arrayForEach(childNodes, function (childNode) { domNode.appendChild(childNode); }); } }, replaceDomNodes: function (nodeToReplaceOrNodeArray, newNodesArray) { var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray; if (nodesToReplaceArray.length > 0) { var insertionPoint = nodesToReplaceArray[0]; var parent = insertionPoint.parentNode; for (var i = 0, j = newNodesArray.length; i < j; i++) parent.insertBefore(newNodesArray[i], insertionPoint); for (var i = 0, j = nodesToReplaceArray.length; i < j; i++) { ko.removeNode(nodesToReplaceArray[i]); } } }, setOptionNodeSelectionState: function (optionNode, isSelected) { // IE6 sometimes throws "unknown error" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser. if (navigator.userAgent.indexOf("MSIE 6") >= 0) optionNode.setAttribute("selected", isSelected); else optionNode.selected = isSelected; }, stringTrim: function (string) { return (string || "").replace(stringTrimRegex, ""); }, stringTokenize: function (string, delimiter) { var result = []; var tokens = (string || "").split(delimiter); for (var i = 0, j = tokens.length; i < j; i++) { var trimmed = ko.utils.stringTrim(tokens[i]); if (trimmed !== "") result.push(trimmed); } return result; }, stringStartsWith: function (string, startsWith) { string = string || ""; if (startsWith.length > string.length) return false; return string.substring(0, startsWith.length) === startsWith; }, evalWithinScope: function (expression, scope, outerScope) { // Always do the evaling within a "new Function" to block access to parent scope if (scope === undefined) return (new Function("return " + expression))(); // Ensure "expression" is flattened into a source code string *before* it runs, otherwise // the variable name "expression" itself will clash with a subproperty called "expression" return (new Function("sc_inner", "sc_outer", "with(sc_outer) { with(sc_inner) { return (" + expression + ") } }"))(scope, outerScope || {}); }, domNodeIsContainedBy: function (node, containedByNode) { if (containedByNode.compareDocumentPosition) return (containedByNode.compareDocumentPosition(node) & 16) == 16; while (node != null) { if (node == containedByNode) return true; node = node.parentNode; } return false; }, domNodeIsAttachedToDocument: function (node) { return ko.utils.domNodeIsContainedBy(node, document); }, registerEventHandler: function (element, eventType, handler) { if (typeof jQuery != "undefined") { if (isClickOnCheckableElement(element, eventType)) { // For click events on checkboxes, jQuery interferes with the event handling in an awkward way: // it toggles the element checked state *after* the click event handlers run, whereas native // click events toggle the checked state *before* the event handler. // Fix this by intecepting the handler and applying the correct checkedness before it runs. var originalHandler = handler; handler = function(event, eventData) { var jQuerySuppliedCheckedState = this.checked; if (eventData) this.checked = eventData.checkedStateBeforeEvent !== true; originalHandler.call(this, event); this.checked = jQuerySuppliedCheckedState; // Restore the state jQuery applied }; } jQuery(element)['bind'](eventType, handler); } else if (typeof element.addEventListener == "function") element.addEventListener(eventType, handler, false); else if (typeof element.attachEvent != "undefined") element.attachEvent("on" + eventType, function (event) { handler.call(element, event); }); else throw new Error("Browser doesn't support addEventListener or attachEvent"); }, triggerEvent: function (element, eventType) { if (!(element && element.nodeType)) throw new Error("element must be a DOM node when calling triggerEvent"); if (typeof jQuery != "undefined") { var eventData = []; if (isClickOnCheckableElement(element, eventType)) { // Work around the jQuery "click events on checkboxes" issue described above by storing the original checked state before triggering the handler eventData.push({ checkedStateBeforeEvent: element.checked }); } jQuery(element)['trigger'](eventType, eventData); } else if (typeof document.createEvent == "function") { if (typeof element.dispatchEvent == "function") { var eventCategory = (eventType in knownMouseEvents ? "MouseEvents" : "HTMLEvents"); var event = document.createEvent(eventCategory); event.initEvent(eventType, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, element); element.dispatchEvent(event); } else throw new Error("The supplied element doesn't support dispatchEvent"); } else if (typeof element.fireEvent != "undefined") { // Unlike other browsers, IE doesn't change the checked state of checkboxes/radiobuttons when you trigger their "click" event // so to make it consistent, we'll do it manually here if (eventType == "click") { if ((element.tagName == "INPUT") && ((element.type.toLowerCase() == "checkbox") || (element.type.toLowerCase() == "radio"))) element.checked = element.checked !== true; } element.fireEvent("on" + eventType); } else throw new Error("Browser doesn't support triggering events"); }, unwrapObservable: function (value) { return ko.isObservable(value) ? value() : value; }, domNodeHasCssClass: function (node, className) { var currentClassNames = (node.className || "").split(/\s+/); return ko.utils.arrayIndexOf(currentClassNames, className) >= 0; }, toggleDomNodeCssClass: function (node, className, shouldHaveClass) { var hasClass = ko.utils.domNodeHasCssClass(node, className); if (shouldHaveClass && !hasClass) { node.className = (node.className || "") + " " + className; } else if (hasClass && !shouldHaveClass) { var currentClassNames = (node.className || "").split(/\s+/); var newClassName = ""; for (var i = 0; i < currentClassNames.length; i++) if (currentClassNames[i] != className) newClassName += currentClassNames[i] + " "; node.className = ko.utils.stringTrim(newClassName); } }, range: function (min, max) { min = ko.utils.unwrapObservable(min); max = ko.utils.unwrapObservable(max); var result = []; for (var i = min; i <= max; i++) result.push(i); return result; }, makeArray: function(arrayLikeObject) { var result = []; for (var i = arrayLikeObject.length - 1; i >= 0; i--){ result.push(arrayLikeObject[i]); }; return result; }, isIe6 : isIe6, isIe7 : isIe7, getFormFields: function(form, fieldName) { var fields = ko.utils.makeArray(form.getElementsByTagName("INPUT")).concat(ko.utils.makeArray(form.getElementsByTagName("TEXTAREA"))); var isMatchingField = (typeof fieldName == 'string') ? function(field) { return field.name === fieldName } : function(field) { return fieldName.test(field.name) }; // Treat fieldName as regex or object containing predicate var matches = []; for (var i = fields.length - 1; i >= 0; i--) { if (isMatchingField(fields[i])) matches.push(fields[i]); }; return matches; }, parseJson: function (jsonString) { if (typeof jsonString == "string") { jsonString = ko.utils.stringTrim(jsonString); if (jsonString) { if (window.JSON && window.JSON.parse) // Use native parsing where available return window.JSON.parse(jsonString); return (new Function("return " + jsonString))(); // Fallback on less safe parsing for older browsers } } return null; }, stringifyJson: function (data) { if ((typeof JSON == "undefined") || (typeof JSON.stringify == "undefined")) throw new Error("Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js"); return JSON.stringify(ko.utils.unwrapObservable(data)); }, postJson: function (urlOrForm, data, options) { options = options || {}; var params = options['params'] || {}; var includeFields = options['includeFields'] || this.fieldsIncludedWithJsonPost; var url = urlOrForm; // If we were given a form, use its 'action' URL and pick out any requested field values if((typeof urlOrForm == 'object') && (urlOrForm.tagName == "FORM")) { var originalForm = urlOrForm; url = originalForm.action; for (var i = includeFields.length - 1; i >= 0; i--) { var fields = ko.utils.getFormFields(originalForm, includeFields[i]); for (var j = fields.length - 1; j >= 0; j--) params[fields[j].name] = fields[j].value; } } data = ko.utils.unwrapObservable(data); var form = document.createElement("FORM"); form.style.display = "none"; form.action = url; form.method = "post"; for (var key in data) { var input = document.createElement("INPUT"); input.name = key; input.value = ko.utils.stringifyJson(ko.utils.unwrapObservable(data[key])); form.appendChild(input); } for (var key in params) { var input = document.createElement("INPUT"); input.name = key; input.value = params[key]; form.appendChild(input); } document.body.appendChild(form); options['submitter'] ? options['submitter'](form) : form.submit(); setTimeout(function () { form.parentNode.removeChild(form); }, 0); } } })(); ko.exportSymbol('ko.utils', ko.utils); ko.exportSymbol('ko.utils.arrayForEach', ko.utils.arrayForEach); ko.exportSymbol('ko.utils.arrayFirst', ko.utils.arrayFirst); ko.exportSymbol('ko.utils.arrayFilter', ko.utils.arrayFilter); ko.exportSymbol('ko.utils.arrayGetDistinctValues', ko.utils.arrayGetDistinctValues); ko.exportSymbol('ko.utils.arrayIndexOf', ko.utils.arrayIndexOf); ko.exportSymbol('ko.utils.arrayMap', ko.utils.arrayMap); ko.exportSymbol('ko.utils.arrayPushAll', ko.utils.arrayPushAll); ko.exportSymbol('ko.utils.arrayRemoveItem', ko.utils.arrayRemoveItem); ko.exportSymbol('ko.utils.fieldsIncludedWithJsonPost', ko.utils.fieldsIncludedWithJsonPost); ko.exportSymbol('ko.utils.getFormFields', ko.utils.getFormFields); ko.exportSymbol('ko.utils.postJson', ko.utils.postJson); ko.exportSymbol('ko.utils.parseJson', ko.utils.parseJson); ko.exportSymbol('ko.utils.registerEventHandler', ko.utils.registerEventHandler); ko.exportSymbol('ko.utils.stringifyJson', ko.utils.stringifyJson); ko.exportSymbol('ko.utils.range', ko.utils.range); ko.exportSymbol('ko.utils.toggleDomNodeCssClass', ko.utils.toggleDomNodeCssClass); ko.exportSymbol('ko.utils.triggerEvent', ko.utils.triggerEvent); ko.exportSymbol('ko.utils.unwrapObservable', ko.utils.unwrapObservable); if (!Function.prototype['bind']) { // Function.prototype.bind is a standard part of ECMAScript 5th Edition (December 2009, http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-262.pdf) // In case the browser doesn't implement it natively, provide a JavaScript implementation. This implementation is based on the one in prototype.js Function.prototype['bind'] = function (object) { var originalFunction = this, args = Array.prototype.slice.call(arguments), object = args.shift(); return function () { return originalFunction.apply(object, args.concat(Array.prototype.slice.call(arguments))); }; }; } ko.utils.domData = new (function () { var uniqueId = 0; var dataStoreKeyExpandoPropertyName = "__ko__" + (new Date).getTime(); var dataStore = {}; return { get: function (node, key) { var allDataForNode = ko.utils.domData.getAll(node, false); return allDataForNode === undefined ? undefined : allDataForNode[key]; }, set: function (node, key, value) { if (value === undefined) { // Make sure we don't actually create a new domData key if we are actually deleting a value if (ko.utils.domData.getAll(node, false) === undefined) return; } var allDataForNode = ko.utils.domData.getAll(node, true); allDataForNode[key] = value; }, getAll: function (node, createIfNotFound) { var dataStoreKey = node[dataStoreKeyExpandoPropertyName]; if (!dataStoreKey) { if (!createIfNotFound) return undefined; dataStoreKey = node[dataStoreKeyExpandoPropertyName] = "ko" + uniqueId++; dataStore[dataStoreKey] = {}; } return dataStore[dataStoreKey]; }, clear: function (node) { var dataStoreKey = node[dataStoreKeyExpandoPropertyName]; if (dataStoreKey) { delete dataStore[dataStoreKey]; node[dataStoreKeyExpandoPropertyName] = null; } } } })(); ko.utils.domNodeDisposal = new (function () { var domDataKey = "__ko_domNodeDisposal__" + (new Date).getTime(); function getDisposeCallbacksCollection(node, createIfNotFound) { var allDisposeCallbacks = ko.utils.domData.get(node, domDataKey); if ((allDisposeCallbacks === undefined) && createIfNotFound) { allDisposeCallbacks = []; ko.utils.domData.set(node, domDataKey, allDisposeCallbacks); } return allDisposeCallbacks; } function destroyCallbacksCollection(node) { ko.utils.domData.set(node, domDataKey, undefined); } function cleanSingleNode(node) { // Run all the dispose callbacks var callbacks = getDisposeCallbacksCollection(node, false); if (callbacks) { callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves) for (var i = 0; i < callbacks.length; i++) callbacks[i](node); } // Also erase the DOM data ko.utils.domData.clear(node); // Special support for jQuery here because it's so commonly used. // Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData // so notify it to tear down any resources associated with the node & descendants here. if ((typeof jQuery == "function") && (typeof jQuery['cleanData'] == "function")) jQuery['cleanData']([node]); } return { addDisposeCallback : function(node, callback) { if (typeof callback != "function") throw new Error("Callback must be a function"); getDisposeCallbacksCollection(node, true).push(callback); }, removeDisposeCallback : function(node, callback) { var callbacksCollection = getDisposeCallbacksCollection(node, false); if (callbacksCollection) { ko.utils.arrayRemoveItem(callbacksCollection, callback); if (callbacksCollection.length == 0) destroyCallbacksCollection(node); } }, cleanNode : function(node) { if ((node.nodeType != 1) && (node.nodeType != 9)) return; cleanSingleNode(node); // Clone the descendants list in case it changes during iteration var descendants = []; ko.utils.arrayPushAll(descendants, node.getElementsByTagName("*")); for (var i = 0, j = descendants.length; i < j; i++) cleanSingleNode(descendants[i]); }, removeNode : function(node) { ko.cleanNode(node); if (node.parentNode) node.parentNode.removeChild(node); } } })(); ko.cleanNode = ko.utils.domNodeDisposal.cleanNode; // Shorthand name for convenience ko.removeNode = ko.utils.domNodeDisposal.removeNode; // Shorthand name for convenience ko.exportSymbol('ko.cleanNode', ko.cleanNode); ko.exportSymbol('ko.removeNode', ko.removeNode); ko.exportSymbol('ko.utils.domNodeDisposal', ko.utils.domNodeDisposal); ko.exportSymbol('ko.utils.domNodeDisposal.addDisposeCallback', ko.utils.domNodeDisposal.addDisposeCallback); ko.exportSymbol('ko.utils.domNodeDisposal.removeDisposeCallback', ko.utils.domNodeDisposal.removeDisposeCallback); ko.memoization = (function () { var memos = {}; function randomMax8HexChars() { return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1); } function generateRandomId() { return randomMax8HexChars() + randomMax8HexChars(); } function findMemoNodes(rootNode, appendToArray) { if (!rootNode) return; if (rootNode.nodeType == 8) { var memoId = ko.memoization.parseMemoText(rootNode.nodeValue); if (memoId != null) appendToArray.push({ domNode: rootNode, memoId: memoId }); } else if (rootNode.nodeType == 1) { for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++) findMemoNodes(childNodes[i], appendToArray); } } return { memoize: function (callback) { if (typeof callback != "function") throw new Error("You can only pass a function to ko.memoization.memoize()"); var memoId = generateRandomId(); memos[memoId] = callback; return ""; }, unmemoize: function (memoId, callbackParams) { var callback = memos[memoId]; if (callback === undefined) throw new Error("Couldn't find any memo with ID " + memoId + ". Perhaps it's already been unmemoized."); try { callback.apply(null, callbackParams || []); return true; } finally { delete memos[memoId]; } }, unmemoizeDomNodeAndDescendants: function (domNode, extraCallbackParamsArray) { var memos = []; findMemoNodes(domNode, memos); for (var i = 0, j = memos.length; i < j; i++) { var node = memos[i].domNode; var combinedParams = [node]; if (extraCallbackParamsArray) ko.utils.arrayPushAll(combinedParams, extraCallbackParamsArray); ko.memoization.unmemoize(memos[i].memoId, combinedParams); node.nodeValue = ""; // Neuter this node so we don't try to unmemoize it again if (node.parentNode) node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again) } }, parseMemoText: function (memoText) { var match = memoText.match(/^\[ko_memo\:(.*?)\]$/); return match ? match[1] : null; } }; })(); ko.exportSymbol('ko.memoization', ko.memoization); ko.exportSymbol('ko.memoization.memoize', ko.memoization.memoize); ko.exportSymbol('ko.memoization.unmemoize', ko.memoization.unmemoize); ko.exportSymbol('ko.memoization.parseMemoText', ko.memoization.parseMemoText); ko.exportSymbol('ko.memoization.unmemoizeDomNodeAndDescendants', ko.memoization.unmemoizeDomNodeAndDescendants); ko.extenders = {}; function applyExtenders(requestedExtenders) { var target = this; if (requestedExtenders) { for (var key in requestedExtenders) { var extenderHandler = ko.extenders[key]; if (typeof extenderHandler == 'function') { target = extenderHandler(target, requestedExtenders[key]); } } } return target; } ko.exportSymbol('ko.extenders', ko.extenders); ko.subscription = function (callback, disposeCallback) { this.callback = callback; this.dispose = function () { this.isDisposed = true; disposeCallback(); }['bind'](this); ko.exportProperty(this, 'dispose', this.dispose); }; ko.subscribable = function () { var _subscriptions = []; this.subscribe = function (callback, callbackTarget) { var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback; var subscription = new ko.subscription(boundCallback, function () { ko.utils.arrayRemoveItem(_subscriptions, subscription); }); _subscriptions.push(subscription); return subscription; }; this.notifySubscribers = function (valueToNotify) { ko.utils.arrayForEach(_subscriptions.slice(0), function (subscription) { // In case a subscription was disposed during the arrayForEach cycle, check // for isDisposed on each subscription before invoking its callback if (subscription && (subscription.isDisposed !== true)) subscription.callback(valueToNotify); }); }; this.getSubscriptionsCount = function () { return _subscriptions.length; }; this.extend = applyExtenders; ko.exportProperty(this, 'subscribe', this.subscribe); ko.exportProperty(this, 'extend', this.extend); ko.exportProperty(this, 'notifySubscribers', this.notifySubscribers); ko.exportProperty(this, 'getSubscriptionsCount', this.getSubscriptionsCount); } ko.isSubscribable = function (instance) { return typeof instance.subscribe == "function" && typeof instance.notifySubscribers == "function"; }; ko.exportSymbol('ko.subscribable', ko.subscribable); ko.exportSymbol('ko.isSubscribable', ko.isSubscribable); ko.dependencyDetection = (function () { var _frames = []; return { begin: function (callback) { _frames.push({ callback: callback, distinctDependencies:[] }); }, end: function () { _frames.pop(); }, registerDependency: function (subscribable) { if (!ko.isSubscribable(subscribable)) throw "Only subscribable things can act as dependencies"; if (_frames.length > 0) { var topFrame = _frames[_frames.length - 1]; if (ko.utils.arrayIndexOf(topFrame.distinctDependencies, subscribable) >= 0) return; topFrame.distinctDependencies.push(subscribable); topFrame.callback(subscribable); } } }; })();var primitiveTypes = { 'undefined':true, 'boolean':true, 'number':true, 'string':true }; function valuesArePrimitiveAndEqual(a, b) { var oldValueIsPrimitive = (a === null) || (typeof(a) in primitiveTypes); return oldValueIsPrimitive ? (a === b) : false; } ko.observable = function (initialValue) { var _latestValue = initialValue; function observable() { if (arguments.length > 0) { // Write // Ignore writes if the value hasn't changed if ((!observable['equalityComparer']) || !observable['equalityComparer'](_latestValue, arguments[0])) { _latestValue = arguments[0]; observable.notifySubscribers(_latestValue); } return this; // Permits chained assignments } else { // Read ko.dependencyDetection.registerDependency(observable); // The caller only needs to be notified of changes if they did a "read" operation return _latestValue; } } observable.__ko_proto__ = ko.observable; observable.valueHasMutated = function () { observable.notifySubscribers(_latestValue); } observable['equalityComparer'] = valuesArePrimitiveAndEqual; ko.subscribable.call(observable); ko.exportProperty(observable, "valueHasMutated", observable.valueHasMutated); return observable; } ko.isObservable = function (instance) { if ((instance === null) || (instance === undefined) || (instance.__ko_proto__ === undefined)) return false; if (instance.__ko_proto__ === ko.observable) return true; return ko.isObservable(instance.__ko_proto__); // Walk the prototype chain } ko.isWriteableObservable = function (instance) { // Observable if ((typeof instance == "function") && instance.__ko_proto__ === ko.observable) return true; // Writeable dependent observable if ((typeof instance == "function") && (instance.__ko_proto__ === ko.dependentObservable) && (instance.hasWriteFunction)) return true; // Anything else return false; } ko.exportSymbol('ko.observable', ko.observable); ko.exportSymbol('ko.isObservable', ko.isObservable); ko.exportSymbol('ko.isWriteableObservable', ko.isWriteableObservable); ko.observableArray = function (initialValues) { if (arguments.length == 0) { // Zero-parameter constructor initializes to empty array initialValues = []; } if ((initialValues !== null) && (initialValues !== undefined) && !('length' in initialValues)) throw new "The argument passed when initializing an observable array must be an array, or null, or undefined."; var result = new ko.observable(initialValues); ko.utils.arrayForEach(["pop", "push", "reverse", "shift", "sort", "splice", "unshift"], function (methodName) { result[methodName] = function () { var underlyingArray = result(); var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments); result.valueHasMutated(); return methodCallResult; }; }); ko.utils.arrayForEach(["slice"], function (methodName) { result[methodName] = function () { var underlyingArray = result(); return underlyingArray[methodName].apply(underlyingArray, arguments); }; }); result.remove = function (valueOrPredicate) { var underlyingArray = result(); var remainingValues = []; var removedValues = []; var predicate = typeof valueOrPredicate == "function" ? valueOrPredicate : function (value) { return value === valueOrPredicate; }; for (var i = 0, j = underlyingArray.length; i < j; i++) { var value = underlyingArray[i]; if (!predicate(value)) remainingValues.push(value); else removedValues.push(value); } result(remainingValues); return removedValues; }; result.removeAll = function (arrayOfValues) { // If you passed zero args, we remove everything if (arrayOfValues === undefined) { var allValues = result(); result([]); return allValues; } // If you passed an arg, we interpret it as an array of entries to remove if (!arrayOfValues) return []; return result.remove(function (value) { return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0; }); }; result.destroy = function (valueOrPredicate) { var underlyingArray = result(); var predicate = typeof valueOrPredicate == "function" ? valueOrPredicate : function (value) { return value === valueOrPredicate; }; for (var i = underlyingArray.length - 1; i >= 0; i--) { var value = underlyingArray[i]; if (predicate(value)) underlyingArray[i]["_destroy"] = true; } result.valueHasMutated(); }; result.destroyAll = function (arrayOfValues) { // If you passed zero args, we destroy everything if (arrayOfValues === undefined) return result.destroy(function() { return true }); // If you passed an arg, we interpret it as an array of entries to destroy if (!arrayOfValues) return []; return result.destroy(function (value) { return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0; }); }; result.indexOf = function (item) { var underlyingArray = result(); return ko.utils.arrayIndexOf(underlyingArray, item); }; result.replace = function(oldItem, newItem) { var index = result.indexOf(oldItem); if (index >= 0) { result()[index] = newItem; result.valueHasMutated(); } }; ko.exportProperty(result, "remove", result.remove); ko.exportProperty(result, "removeAll", result.removeAll); ko.exportProperty(result, "destroy", result.destroy); ko.exportProperty(result, "destroyAll", result.destroyAll); ko.exportProperty(result, "indexOf", result.indexOf); return result; } ko.exportSymbol('ko.observableArray', ko.observableArray); ko.dependentObservable = function (evaluatorFunctionOrOptions, evaluatorFunctionTarget, options) { var _latestValue, _hasBeenEvaluated = false; if (evaluatorFunctionOrOptions && typeof evaluatorFunctionOrOptions == "object") { // Single-parameter syntax - everything is on this "options" param options = evaluatorFunctionOrOptions; } else { // Multi-parameter syntax - construct the options according to the params passed options = options || {}; options["read"] = evaluatorFunctionOrOptions || options["read"]; options["owner"] = evaluatorFunctionTarget || options["owner"]; } // By here, "options" is always non-null if (typeof options["read"] != "function") throw "Pass a function that returns the value of the dependentObservable"; // Build "disposeWhenNodeIsRemoved" and "disposeWhenNodeIsRemovedCallback" option values // (Note: "disposeWhenNodeIsRemoved" option both proactively disposes as soon as the node is removed using ko.removeNode(), // plus adds a "disposeWhen" callback that, on each evaluation, disposes if the node was removed by some other means.) var disposeWhenNodeIsRemoved = (typeof options["disposeWhenNodeIsRemoved"] == "object") ? options["disposeWhenNodeIsRemoved"] : null; var disposeWhenNodeIsRemovedCallback = null; if (disposeWhenNodeIsRemoved) { disposeWhenNodeIsRemovedCallback = function() { dependentObservable.dispose() }; ko.utils.domNodeDisposal.addDisposeCallback(disposeWhenNodeIsRemoved, disposeWhenNodeIsRemovedCallback); var existingDisposeWhenFunction = options["disposeWhen"]; options["disposeWhen"] = function () { return (!ko.utils.domNodeIsAttachedToDocument(disposeWhenNodeIsRemoved)) || ((typeof existingDisposeWhenFunction == "function") && existingDisposeWhenFunction()); } } var _subscriptionsToDependencies = []; function disposeAllSubscriptionsToDependencies() { ko.utils.arrayForEach(_subscriptionsToDependencies, function (subscription) { subscription.dispose(); }); _subscriptionsToDependencies = []; } function evaluate() { // Don't dispose on first evaluation, because the "disposeWhen" callback might // e.g., dispose when the associated DOM element isn't in the doc, and it's not // going to be in the doc until *after* the first evaluation if ((_hasBeenEvaluated) && typeof options["disposeWhen"] == "function") { if (options["disposeWhen"]()) { dependentObservable.dispose(); return; } } try { disposeAllSubscriptionsToDependencies(); ko.dependencyDetection.begin(function(subscribable) { _subscriptionsToDependencies.push(subscribable.subscribe(evaluate)); }); _latestValue = options["owner"] ? options["read"].call(options["owner"]) : options["read"](); } finally { ko.dependencyDetection.end(); } dependentObservable.notifySubscribers(_latestValue); _hasBeenEvaluated = true; } function dependentObservable() { if (arguments.length > 0) { if (typeof options["write"] === "function") { // Writing a value var valueToWrite = arguments[0]; options["owner"] ? options["write"].call(options["owner"], valueToWrite) : options["write"](valueToWrite); } else { throw "Cannot write a value to a dependentObservable unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters."; } } else { // Reading the value if (!_hasBeenEvaluated) evaluate(); ko.dependencyDetection.registerDependency(dependentObservable); return _latestValue; } } dependentObservable.__ko_proto__ = ko.dependentObservable; dependentObservable.getDependenciesCount = function () { return _subscriptionsToDependencies.length; } dependentObservable.hasWriteFunction = typeof options["write"] === "function"; dependentObservable.dispose = function () { if (disposeWhenNodeIsRemoved) ko.utils.domNodeDisposal.removeDisposeCallback(disposeWhenNodeIsRemoved, disposeWhenNodeIsRemovedCallback); disposeAllSubscriptionsToDependencies(); }; ko.subscribable.call(dependentObservable); if (options['deferEvaluation'] !== true) evaluate(); ko.exportProperty(dependentObservable, 'dispose', dependentObservable.dispose); ko.exportProperty(dependentObservable, 'getDependenciesCount', dependentObservable.getDependenciesCount); return dependentObservable; }; ko.dependentObservable.__ko_proto__ = ko.observable; ko.exportSymbol('ko.dependentObservable', ko.dependentObservable); (function() { var maxNestedObservableDepth = 10; // Escape the (unlikely) pathalogical case where an observable's current value is itself (or similar reference cycle) ko.toJS = function(rootObject) { if (arguments.length == 0) throw new Error("When calling ko.toJS, pass the object you want to convert."); // We just unwrap everything at every level in the object graph return mapJsObjectGraph(rootObject, function(valueToMap) { // Loop because an observable's value might in turn be another observable wrapper for (var i = 0; ko.isObservable(valueToMap) && (i < maxNestedObservableDepth); i++) valueToMap = valueToMap(); return valueToMap; }); }; ko.toJSON = function(rootObject) { var plainJavaScriptObject = ko.toJS(rootObject); return ko.utils.stringifyJson(plainJavaScriptObject); }; function mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) { visitedObjects = visitedObjects || new objectLookup(); rootObject = mapInputCallback(rootObject); var canHaveProperties = (typeof rootObject == "object") && (rootObject !== null) && (rootObject !== undefined); if (!canHaveProperties) return rootObject; var outputProperties = rootObject instanceof Array ? [] : {}; visitedObjects.save(rootObject, outputProperties); visitPropertiesOrArrayEntries(rootObject, function(indexer) { var propertyValue = mapInputCallback(rootObject[indexer]); switch (typeof propertyValue) { case "boolean": case "number": case "string": case "function": outputProperties[indexer] = propertyValue; break; case "object": case "undefined": var previouslyMappedValue = visitedObjects.get(propertyValue); outputProperties[indexer] = (previouslyMappedValue !== undefined) ? previouslyMappedValue : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects); break; } }); return outputProperties; } function visitPropertiesOrArrayEntries(rootObject, visitorCallback) { if (rootObject instanceof Array) { for (var i = 0; i < rootObject.length; i++) visitorCallback(i); } else { for (var propertyName in rootObject) visitorCallback(propertyName); } }; function objectLookup() { var keys = []; var values = []; this.save = function(key, value) { var existingIndex = ko.utils.arrayIndexOf(keys, key); if (existingIndex >= 0) values[existingIndex] = value; else { keys.push(key); values.push(value); } }; this.get = function(key) { var existingIndex = ko.utils.arrayIndexOf(keys, key); return (existingIndex >= 0) ? values[existingIndex] : undefined; }; }; })(); ko.exportSymbol('ko.toJS', ko.toJS); ko.exportSymbol('ko.toJSON', ko.toJSON);(function () { // Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values // are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values // that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns. ko.selectExtensions = { readValue : function(element) { if (element.tagName == 'OPTION') { if (element['__ko__hasDomDataOptionValue__'] === true) return ko.utils.domData.get(element, ko.bindingHandlers.options.optionValueDomDataKey); return element.getAttribute("value"); } else if (element.tagName == 'SELECT') return element.selectedIndex >= 0 ? ko.selectExtensions.readValue(element.options[element.selectedIndex]) : undefined; else return element.value; }, writeValue: function(element, value) { if (element.tagName == 'OPTION') { switch(typeof value) { case "string": case "number": ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, undefined); if ('__ko__hasDomDataOptionValue__' in element) { // IE <= 8 throws errors if you delete non-existent properties from a DOM node delete element['__ko__hasDomDataOptionValue__']; } element.value = value; break; default: // Store arbitrary object using DomData ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, value); element['__ko__hasDomDataOptionValue__'] = true; element.value = ""; break; } } else if (element.tagName == 'SELECT') { for (var i = element.options.length - 1; i >= 0; i--) { if (ko.selectExtensions.readValue(element.options[i]) == value) { element.selectedIndex = i; break; } } } else { if ((value === null) || (value === undefined)) value = ""; element.value = value; } } }; })(); ko.exportSymbol('ko.selectExtensions', ko.selectExtensions); ko.exportSymbol('ko.selectExtensions.readValue', ko.selectExtensions.readValue); ko.exportSymbol('ko.selectExtensions.writeValue', ko.selectExtensions.writeValue); ko.jsonExpressionRewriting = (function () { var restoreCapturedTokensRegex = /\[ko_token_(\d+)\]/g; var javaScriptAssignmentTarget = /^[\_$a-z][\_$a-z0-9]*(\[.*?\])*(\.[\_$a-z][\_$a-z0-9]*(\[.*?\])*)*$/i; var javaScriptReservedWords = ["true", "false"]; function restoreTokens(string, tokens) { return string.replace(restoreCapturedTokensRegex, function (match, tokenIndex) { return tokens[tokenIndex]; }); } function isWriteableValue(expression) { if (ko.utils.arrayIndexOf(javaScriptReservedWords, ko.utils.stringTrim(expression).toLowerCase()) >= 0) return false; return expression.match(javaScriptAssignmentTarget) !== null; } return { parseJson: function (jsonString) { jsonString = ko.utils.stringTrim(jsonString); if (jsonString.length < 3) return {}; // We're going to split on commas, so first extract any blocks that may contain commas other than those at the top level var tokens = []; var tokenStart = null, tokenEndChar; for (var position = jsonString.charAt(0) == "{" ? 1 : 0; position < jsonString.length; position++) { var c = jsonString.charAt(position); if (tokenStart === null) { switch (c) { case '"': case "'": case "/": tokenStart = position; tokenEndChar = c; break; case "{": tokenStart = position; tokenEndChar = "}"; break; case "[": tokenStart = position; tokenEndChar = "]"; break; } } else if (c == tokenEndChar) { var token = jsonString.substring(tokenStart, position + 1); tokens.push(token); var replacement = "[ko_token_" + (tokens.length - 1) + "]"; jsonString = jsonString.substring(0, tokenStart) + replacement + jsonString.substring(position + 1); position -= (token.length - replacement.length); tokenStart = null; } } // Now we can safely split on commas to get the key/value pairs var result = {}; var keyValuePairs = jsonString.split(","); for (var i = 0, j = keyValuePairs.length; i < j; i++) { var pair = keyValuePairs[i]; var colonPos = pair.indexOf(":"); if ((colonPos > 0) && (colonPos < pair.length - 1)) { var key = ko.utils.stringTrim(pair.substring(0, colonPos)); var value = ko.utils.stringTrim(pair.substring(colonPos + 1)); if (key.charAt(0) == "{") key = key.substring(1); if (value.charAt(value.length - 1) == "}") value = value.substring(0, value.length - 1); key = ko.utils.stringTrim(restoreTokens(key, tokens)); value = ko.utils.stringTrim(restoreTokens(value, tokens)); result[key] = value; } } return result; }, insertPropertyAccessorsIntoJson: function (jsonString) { var parsed = ko.jsonExpressionRewriting.parseJson(jsonString); var propertyAccessorTokens = []; for (var key in parsed) { var value = parsed[key]; if (isWriteableValue(value)) { if (propertyAccessorTokens.length > 0) propertyAccessorTokens.push(", "); propertyAccessorTokens.push(key + " : function(__ko_value) { " + value + " = __ko_value; }"); } } if (propertyAccessorTokens.length > 0) { var allPropertyAccessors = propertyAccessorTokens.join(""); jsonString = jsonString + ", '_ko_property_writers' : { " + allPropertyAccessors + " } "; } return jsonString; } }; })(); ko.exportSymbol('ko.jsonExpressionRewriting', ko.jsonExpressionRewriting); ko.exportSymbol('ko.jsonExpressionRewriting.parseJson', ko.jsonExpressionRewriting.parseJson); ko.exportSymbol('ko.jsonExpressionRewriting.insertPropertyAccessorsIntoJson', ko.jsonExpressionRewriting.insertPropertyAccessorsIntoJson); (function () { var defaultBindingAttributeName = "data-bind"; ko.bindingHandlers = {}; function parseBindingAttribute(attributeText, viewModel, options) { try { var json = " { " + ko.jsonExpressionRewriting.insertPropertyAccessorsIntoJson(attributeText) + " } "; return ko.utils.evalWithinScope(json, viewModel === null ? window : viewModel, options ? options['outerScope'] : undefined); } catch (ex) { throw new Error("Unable to parse binding attribute.\nMessage: " + ex + ";\nAttribute value: " + attributeText); } } function invokeBindingHandler(binding, handler, element, valueAccessor, allBindingsAccessor, viewModel, dataStore, options) { return handler.call(binding, element, valueAccessor, allBindingsAccessor, viewModel, dataStore, options); } function applyBindingsToDescendantsInternal (viewModel, nodeVerified, options) { var child; for (var i = 0; child = nodeVerified.childNodes[i]; i++) { if (child.nodeType === 1) applyBindingsToNodeAndDescendantsInternal(viewModel, child, options); } } function applyBindingsToNodeAndDescendantsInternal (viewModel, nodeVerified, options) { var bindingResult; if (nodeVerified.getAttribute(defaultBindingAttributeName)) bindingResult = ko.applyBindingsToNode(nodeVerified, null, viewModel, undefined, options); if ((!bindingResult) || (bindingResult['bindChildren'] !== false)) applyBindingsToDescendantsInternal(viewModel, nodeVerified, options); } ko.applyBindingsToNode = function (node, bindings, viewModel, bindingAttributeName, options) { var isFirstEvaluation = true; bindingAttributeName = bindingAttributeName || defaultBindingAttributeName; // Each time the dependentObservable is evaluated (after data changes), // the binding attribute is reparsed so that it can pick out the correct // model properties in the context of the changed data. // DOM event callbacks need to be able to access this changed data, // so we need a single parsedBindings variable (shared by all callbacks // associated with this node's bindings) that all the closures can access. var parsedBindings; function makeValueAccessor(bindingKey) { return function () { return parsedBindings[bindingKey] } } function parsedBindingsAccessor() { return parsedBindings; } var bindingsDataStores = {}, shouldBindChildren = true; new ko.dependentObservable( function () { var evaluatedBindings = (typeof bindings == "function") ? bindings() : bindings; parsedBindings = evaluatedBindings || parseBindingAttribute(node.getAttribute(bindingAttributeName), viewModel, options); // First run all the inits, so bindings can register for notification on changes if (isFirstEvaluation) { for (var bindingKey in parsedBindings) { bindingsDataStores[bindingKey] = {}; var binding = ko.bindingHandlers[bindingKey]; if (binding && typeof binding["init"] == "function") { var result = invokeBindingHandler(binding, binding["init"], node, makeValueAccessor(bindingKey), parsedBindingsAccessor, viewModel, bindingsDataStores[bindingKey], options); if (result && result['bindChildren'] === false) shouldBindChildren = false; } } } // ... then run all the updates, which might trigger changes even on the first evaluation for (var bindingKey in parsedBindings) { var binding = ko.bindingHandlers[bindingKey]; if (binding && typeof binding["update"] == "function") invokeBindingHandler(binding, binding["update"], node, makeValueAccessor(bindingKey), parsedBindingsAccessor, viewModel, bindingsDataStores[bindingKey], options); } }, null, { 'disposeWhenNodeIsRemoved' : node } ); isFirstEvaluation = false; return { 'bindChildren' : shouldBindChildren }; }; ko.applyBindingsToDescendants = function(viewModel, node, options) { if ((!node) || (node.nodeType !== 1)) throw new Error("ko.applyBindingsToDescendants: first parameter should be your view model; second parameter should be a DOM node"); applyBindingsToDescendantsInternal(viewModel, node, options); }; ko.applyBindings = function (viewModel, rootNode, options) { if (rootNode && (rootNode.nodeType !== 1)) throw new Error("ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node"); rootNode = rootNode || window.document.body; // Make "rootNode" parameter optional applyBindingsToNodeAndDescendantsInternal(viewModel, rootNode, options); }; ko.exportSymbol('ko.bindingHandlers', ko.bindingHandlers); ko.exportSymbol('ko.applyBindings', ko.applyBindings); ko.exportSymbol('ko.applyBindingsToDescendants', ko.applyBindingsToDescendants); ko.exportSymbol('ko.applyBindingsToNode', ko.applyBindingsToNode); })();// For certain common events (currently just 'click'), allow a simplified data-binding syntax // e.g. click:handler instead of the usual full-length event:{click:handler} var eventHandlersWithShortcuts = ['click']; ko.utils.arrayForEach(eventHandlersWithShortcuts, function(eventName) { ko.bindingHandlers[eventName] = { 'init': function(element, valueAccessor, allBindingsAccessor, viewModel) { var newValueAccessor = function () { var result = {}; result[eventName] = valueAccessor(); return result; }; return ko.bindingHandlers['event']['init'].call(this, element, newValueAccessor, allBindingsAccessor, viewModel); } } }); ko.bindingHandlers['event'] = { 'init' : function (element, valueAccessor, allBindingsAccessor, viewModel) { var eventsToHandle = valueAccessor() || {}; for(var eventNameOutsideClosure in eventsToHandle) { (function() { var eventName = eventNameOutsideClosure; // Separate variable to be captured by event handler closure if (typeof eventName == "string") { ko.utils.registerEventHandler(element, eventName, function (event) { var handlerReturnValue; var handlerFunction = valueAccessor()[eventName]; var allBindings = allBindingsAccessor(); try { handlerReturnValue = handlerFunction.apply(viewModel, arguments); } finally { if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true. if (event.preventDefault) event.preventDefault(); else event.returnValue = false; } } var bubble = allBindings[eventName + 'Bubble'] !== false; if (!bubble) { event.cancelBubble = true; if (event.stopPropagation) event.stopPropagation(); } }); } })(); } } }; ko.bindingHandlers['submit'] = { 'init': function (element, valueAccessor, allBindingsAccessor, viewModel) { if (typeof valueAccessor() != "function") throw new Error("The value for a submit binding must be a function to invoke on submit"); ko.utils.registerEventHandler(element, "submit", function (event) { var handlerReturnValue; var value = valueAccessor(); try { handlerReturnValue = value.call(viewModel, element); } finally { if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true. if (event.preventDefault) event.preventDefault(); else event.returnValue = false; } } }); } }; ko.bindingHandlers['visible'] = { 'update': function (element, valueAccessor) { var value = ko.utils.unwrapObservable(valueAccessor()); var isCurrentlyVisible = !(element.style.display == "none"); if (value && !isCurrentlyVisible) element.style.display = ""; else if ((!value) && isCurrentlyVisible) element.style.display = "none"; } } ko.bindingHandlers['enable'] = { 'update': function (element, valueAccessor) { var value = ko.utils.unwrapObservable(valueAccessor()); if (value && element.disabled) element.removeAttribute("disabled"); else if ((!value) && (!element.disabled)) element.disabled = true; } }; ko.bindingHandlers['disable'] = { 'update': function (element, valueAccessor) { ko.bindingHandlers['enable']['update'](element, function() { return !ko.utils.unwrapObservable(valueAccessor()) }); } }; ko.bindingHandlers['value'] = { 'init': function (element, valueAccessor, allBindingsAccessor) { var eventName = allBindingsAccessor()["valueUpdate"] || "change"; // The syntax "after" means "run the handler asynchronously after the event" // This is useful, for example, to catch "keydown" events after the browser has updated the control // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event) var handleEventAsynchronously = false; if (ko.utils.stringStartsWith(eventName, "after")) { handleEventAsynchronously = true; eventName = eventName.substring("after".length); } var runEventHandler = handleEventAsynchronously ? function(handler) { setTimeout(handler, 0) } : function(handler) { handler() }; ko.utils.registerEventHandler(element, eventName, function () { runEventHandler(function() { var modelValue = valueAccessor(); var elementValue = ko.selectExtensions.readValue(element); if (ko.isWriteableObservable(modelValue)) modelValue(elementValue); else { var allBindings = allBindingsAccessor(); if (allBindings['_ko_property_writers'] && allBindings['_ko_property_writers']['value']) allBindings['_ko_property_writers']['value'](elementValue); } }); }); }, 'update': function (element, valueAccessor) { var newValue = ko.utils.unwrapObservable(valueAccessor()); var elementValue = ko.selectExtensions.readValue(element); var valueHasChanged = (newValue != elementValue); // JavaScript's 0 == "" behavious is unfortunate here as it prevents writing 0 to an empty text box (loose equality suggests the values are the same). // We don't want to do a strict equality comparison as that is more confusing for developers in certain cases, so we specifically special case 0 != "" here. if ((newValue === 0) && (elementValue !== 0) && (elementValue !== "0")) valueHasChanged = true; if (valueHasChanged) { var applyValueAction = function () { ko.selectExtensions.writeValue(element, newValue); }; applyValueAction(); // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread // to apply the value as well. var alsoApplyAsynchronously = element.tagName == "SELECT"; if (alsoApplyAsynchronously) setTimeout(applyValueAction, 0); } // For SELECT nodes, you're not allowed to have a model value that disagrees with the UI selection, so if there is a // difference, treat it as a change that should be written back to the model if (element.tagName == "SELECT") { elementValue = ko.selectExtensions.readValue(element); if(elementValue !== newValue) ko.utils.triggerEvent(element, "change"); } } }; ko.bindingHandlers['options'] = { 'update': function (element, valueAccessor, allBindingsAccessor) { if (element.tagName != "SELECT") throw new Error("options binding applies only to SELECT elements"); var previousSelectedValues = ko.utils.arrayMap(ko.utils.arrayFilter(element.childNodes, function (node) { return node.tagName && node.tagName == "OPTION" && node.selected; }), function (node) { return ko.selectExtensions.readValue(node) || node.innerText || node.textContent; }); var previousScrollTop = element.scrollTop; var value = ko.utils.unwrapObservable(valueAccessor()); var selectedValue = element.value; ko.utils.emptyDomNode(element); if (value) { var allBindings = allBindingsAccessor(); if (typeof value.length != "number") value = [value]; if (allBindings['optionsCaption']) { var option = document.createElement("OPTION"); option.innerHTML = allBindings['optionsCaption']; ko.selectExtensions.writeValue(option, undefined); element.appendChild(option); } for (var i = 0, j = value.length; i < j; i++) { var option = document.createElement("OPTION"); var optionValue = typeof allBindings['optionsValue'] == "string" ? value[i][allBindings['optionsValue']] : value[i]; // Pick some text to appear in the drop-down list for this data value var optionsTextValue = allBindings['optionsText']; if (typeof optionsTextValue == "function") optionText = optionsTextValue(value[i]); // Given a function; run it against the data value else if (typeof optionsTextValue == "string") optionText = value[i][optionsTextValue]; // Given a string; treat it as a property name on the data value else optionText = optionValue; // Given no optionsText arg; use the data value itself optionValue = ko.utils.unwrapObservable(optionValue); optionText = ko.utils.unwrapObservable(optionText); ko.selectExtensions.writeValue(option, optionValue); option.innerHTML = optionText.toString(); element.appendChild(option); } // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document. // That's why we first added them without selection. Now it's time to set the selection. var newOptions = element.getElementsByTagName("OPTION"); var countSelectionsRetained = 0; for (var i = 0, j = newOptions.length; i < j; i++) { if (ko.utils.arrayIndexOf(previousSelectedValues, ko.selectExtensions.readValue(newOptions[i])) >= 0) { ko.utils.setOptionNodeSelectionState(newOptions[i], true); countSelectionsRetained++; } } if (previousScrollTop) element.scrollTop = previousScrollTop; } } }; ko.bindingHandlers['options'].optionValueDomDataKey = '__ko.bindingHandlers.options.optionValueDomData__'; ko.bindingHandlers['selectedOptions'] = { getSelectedValuesFromSelectNode: function (selectNode) { var result = []; var nodes = selectNode.childNodes; for (var i = 0, j = nodes.length; i < j; i++) { var node = nodes[i]; if ((node.tagName == "OPTION") && node.selected) result.push(ko.selectExtensions.readValue(node)); } return result; }, 'init': function (element, valueAccessor, allBindingsAccessor) { ko.utils.registerEventHandler(element, "change", function () { var value = valueAccessor(); if (ko.isWriteableObservable(value)) value(ko.bindingHandlers['selectedOptions'].getSelectedValuesFromSelectNode(this)); else { var allBindings = allBindingsAccessor(); if (allBindings['_ko_property_writers'] && allBindings['_ko_property_writers']['value']) allBindings['_ko_property_writers']['value'](ko.bindingHandlers['selectedOptions'].getSelectedValuesFromSelectNode(this)); } }); }, 'update': function (element, valueAccessor) { if (element.tagName != "SELECT") throw new Error("values binding applies only to SELECT elements"); var newValue = ko.utils.unwrapObservable(valueAccessor()); if (newValue && typeof newValue.length == "number") { var nodes = element.childNodes; for (var i = 0, j = nodes.length; i < j; i++) { var node = nodes[i]; if (node.tagName == "OPTION") ko.utils.setOptionNodeSelectionState(node, ko.utils.arrayIndexOf(newValue, ko.selectExtensions.readValue(node)) >= 0); } } } }; ko.bindingHandlers['text'] = { 'update': function (element, valueAccessor) { var value = ko.utils.unwrapObservable(valueAccessor()); if ((value === null) || (value === undefined)) value = ""; typeof element.innerText == "string" ? element.innerText = value : element.textContent = value; } }; ko.bindingHandlers['html'] = { 'update': function (element, valueAccessor) { var value = ko.utils.unwrapObservable(valueAccessor()); if ((value === null) || (value === undefined)) value = ""; element.innerHTML = value; } }; ko.bindingHandlers['css'] = { 'update': function (element, valueAccessor) { var value = ko.utils.unwrapObservable(valueAccessor() || {}); for (var className in value) { if (typeof className == "string") { var shouldHaveClass = ko.utils.unwrapObservable(value[className]); ko.utils.toggleDomNodeCssClass(element, className, shouldHaveClass); } } } }; ko.bindingHandlers['style'] = { 'update': function (element, valueAccessor) { var value = ko.utils.unwrapObservable(valueAccessor() || {}); for (var styleName in value) { if (typeof styleName == "string") { var styleValue = ko.utils.unwrapObservable(value[styleName]); element.style[styleName] = styleValue || ""; // Empty string removes the value, whereas null/undefined have no effect } } } }; ko.bindingHandlers['uniqueName'] = { 'init': function (element, valueAccessor) { if (valueAccessor()) { element.name = "ko_unique_" + (++ko.bindingHandlers['uniqueName'].currentIndex); // Workaround IE 6 issue - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/ if (ko.utils.isIe6) element.mergeAttributes(document.createElement(""), false); } } }; ko.bindingHandlers['uniqueName'].currentIndex = 0; ko.bindingHandlers['checked'] = { 'init': function (element, valueAccessor, allBindingsAccessor) { var updateHandler = function() { var valueToWrite; if (element.type == "checkbox") { valueToWrite = element.checked; } else if ((element.type == "radio") && (element.checked)) { valueToWrite = element.value; } else { return; // "checked" binding only responds to checkboxes and selected radio buttons } var modelValue = valueAccessor(); if ((element.type == "checkbox") && (ko.utils.unwrapObservable(modelValue) instanceof Array)) { // For checkboxes bound to an array, we add/remove the checkbox value to that array // This works for both observable and non-observable arrays var existingEntryIndex = ko.utils.arrayIndexOf(ko.utils.unwrapObservable(modelValue), element.value); if (element.checked && (existingEntryIndex < 0)) modelValue.push(element.value); else if ((!element.checked) && (existingEntryIndex >= 0)) modelValue.splice(existingEntryIndex, 1); } else if (ko.isWriteableObservable(modelValue)) { if (modelValue() !== valueToWrite) { // Suppress repeated events when there's nothing new to notify (some browsers raise them) modelValue(valueToWrite); } } else { var allBindings = allBindingsAccessor(); if (allBindings['_ko_property_writers'] && allBindings['_ko_property_writers']['checked']) { allBindings['_ko_property_writers']['checked'](valueToWrite); } } }; ko.utils.registerEventHandler(element, "click", updateHandler); // IE 6 won't allow radio buttons to be selected unless they have a name if ((element.type == "radio") && !element.name) ko.bindingHandlers['uniqueName']['init'](element, function() { return true }); }, 'update': function (element, valueAccessor) { var value = ko.utils.unwrapObservable(valueAccessor()); if (element.type == "checkbox") { if (value instanceof Array) { // When bound to an array, the checkbox being checked represents its value being present in that array element.checked = ko.utils.arrayIndexOf(value, element.value) >= 0; } else { // When bound to anything other value (not an array), the checkbox being checked represents the value being trueish element.checked = value; } // Workaround for IE 6 bug - it fails to apply checked state to dynamically-created checkboxes if you merely say "element.checked = true" if (value && ko.utils.isIe6) element.mergeAttributes(document.createElement(""), false); } else if (element.type == "radio") { element.checked = (element.value == value); // Workaround for IE 6/7 bug - it fails to apply checked state to dynamically-created radio buttons if you merely say "element.checked = true" if ((element.value == value) && (ko.utils.isIe6 || ko.utils.isIe7)) element.mergeAttributes(document.createElement(""), false); } } }; ko.bindingHandlers['attr'] = { 'update': function(element, valueAccessor, allBindingsAccessor) { var value = ko.utils.unwrapObservable(valueAccessor()) || {}; for (var attrName in value) { if (typeof attrName == "string") { var attrValue = ko.utils.unwrapObservable(value[attrName]); // To cover cases like "attr: { checked:someProp }", we want to remove the attribute entirely // when someProp is a "no value"-like value (strictly null, false, or undefined) // (because the absence of the "checked" attr is how to mark an element as not checked, etc.) if ((attrValue === false) || (attrValue === null) || (attrValue === undefined)) element.removeAttribute(attrName); else element.setAttribute(attrName, attrValue.toString()); } } } }; // Prototype control flow bindings - API subject to change ko.bindingHandlers['if'] = { 'init' : function(element, valueAccessor, allBindingsAccessor, viewModel, bindingDataStore) { bindingDataStore.markup = element.innerHTML; bindingDataStore.visible = false; ko.utils.emptyDomNode(element); return { 'bindChildren' : false }; }, 'update' : function(element, valueAccessor, allBindingsAccessor, viewModel, bindingDataStore) { var value = ko.utils.unwrapObservable(valueAccessor()); if (value && !bindingDataStore.visible) { bindingDataStore.visible = true; element.innerHTML = bindingDataStore.markup; this['activateChildNodes'](element, value, viewModel); } else if (bindingDataStore.visible && !value) { bindingDataStore.visible = false; ko.utils.emptyDomNode(element); } }, 'activateChildNodes' : function(element, bindingValue, viewModel) { ko.applyBindingsToDescendants(viewModel, element); } }; ko.bindingHandlers['with'] = { 'init' : ko.bindingHandlers['if']['init'], 'update' : ko.bindingHandlers['if']['update'], 'activateChildNodes' : function(element, bindingValue, viewModel) { ko.applyBindingsToDescendants(bindingValue, element); } }; ko.bindingHandlers['foreach'] = { 'init' : function(element, valueAccessor, allBindingsAccessor, viewModel, bindingDataStore) { bindingDataStore.markup = element.innerHTML; ko.utils.emptyDomNode(element); return { 'bindChildren' : false }; }, 'update' : function(element, valueAccessor, allBindingsAccessor, viewModel, bindingDataStore) { var value = ko.utils.unwrapObservable(valueAccessor()); var mapping = function(arrayEntry) { var placeholder = document.createElement("DIV"); placeholder.innerHTML = bindingDataStore.markup; ko.applyBindingsToDescendants(arrayEntry, placeholder, { 'outerScope' : { "$data" : arrayEntry } }); return placeholder.childNodes; }; ko.utils.setDomNodeChildrenFromArrayMapping(element, value, mapping); } }; ko.templateEngine = function () { this['renderTemplate'] = function (templateName, data, options) { throw "Override renderTemplate in your ko.templateEngine subclass"; }, this['isTemplateRewritten'] = function (templateName) { throw "Override isTemplateRewritten in your ko.templateEngine subclass"; }, this['rewriteTemplate'] = function (templateName, rewriterCallback) { throw "Override rewriteTemplate in your ko.templateEngine subclass"; }, this['createJavaScriptEvaluatorBlock'] = function (script) { throw "Override createJavaScriptEvaluatorBlock in your ko.templateEngine subclass"; } }; ko.exportSymbol('ko.templateEngine', ko.templateEngine); ko.templateRewriting = (function () { var memoizeBindingAttributeSyntaxRegex = /(<[a-z]+\d*(\s+(?!data-bind=)[a-z0-9]+(=(\"[^\"]*\"|\'[^\']*\'))?)*\s+)data-bind=(["'])([\s\S]*?)\5/gi; return { ensureTemplateIsRewritten: function (template, templateEngine) { if (!templateEngine['isTemplateRewritten'](template)) templateEngine['rewriteTemplate'](template, function (htmlString) { return ko.templateRewriting.memoizeBindingAttributeSyntax(htmlString, templateEngine); }); }, memoizeBindingAttributeSyntax: function (htmlString, templateEngine) { return htmlString.replace(memoizeBindingAttributeSyntaxRegex, function () { var tagToRetain = arguments[1]; var dataBindAttributeValue = arguments[6]; dataBindAttributeValue = ko.jsonExpressionRewriting.insertPropertyAccessorsIntoJson(dataBindAttributeValue); // For no obvious reason, Opera fails to evaluate dataBindAttributeValue unless it's wrapped in an additional anonymous function, // even though Opera's built-in debugger can evaluate it anyway. No other browser requires this extra indirection. var applyBindingsToNextSiblingScript = "ko.templateRewriting.applyMemoizedBindingsToNextSibling(function() { \ return (function() { return { " + dataBindAttributeValue + " } })() \ })"; return templateEngine['createJavaScriptEvaluatorBlock'](applyBindingsToNextSiblingScript) + tagToRetain; }); }, applyMemoizedBindingsToNextSibling: function (bindings) { return ko.memoization.memoize(function (domNode, viewModel) { if (domNode.nextSibling) ko.applyBindingsToNode(domNode.nextSibling, bindings, viewModel); }); } } })(); ko.exportSymbol('ko.templateRewriting', ko.templateRewriting); ko.exportSymbol('ko.templateRewriting.applyMemoizedBindingsToNextSibling', ko.templateRewriting.applyMemoizedBindingsToNextSibling); // Exported only because it has to be referenced by string lookup from within rewritten template (function () { var _templateEngine; ko.setTemplateEngine = function (templateEngine) { if ((templateEngine != undefined) && !(templateEngine instanceof ko.templateEngine)) throw "templateEngine must inherit from ko.templateEngine"; _templateEngine = templateEngine; } function getFirstNodeFromPossibleArray(nodeOrNodeArray) { return nodeOrNodeArray.nodeType ? nodeOrNodeArray : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0] : null; } function executeTemplate(targetNodeOrNodeArray, renderMode, template, data, options) { var dataForTemplate = ko.utils.unwrapObservable(data); options = options || {}; var templateEngineToUse = (options['templateEngine'] || _templateEngine); ko.templateRewriting.ensureTemplateIsRewritten(template, templateEngineToUse); var renderedNodesArray = templateEngineToUse['renderTemplate'](template, dataForTemplate, options); // Loosely check result is an array of DOM nodes if ((typeof renderedNodesArray.length != "number") || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType != "number")) throw "Template engine must return an array of DOM nodes"; if (renderedNodesArray) ko.utils.arrayForEach(renderedNodesArray, function (renderedNode) { ko.memoization.unmemoizeDomNodeAndDescendants(renderedNode, [data]); }); switch (renderMode) { case "replaceChildren": ko.utils.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray); break; case "replaceNode": ko.utils.replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray); break; case "ignoreTargetNode": break; default: throw new Error("Unknown renderMode: " + renderMode); } if (options['afterRender']) options['afterRender'](renderedNodesArray, data); return renderedNodesArray; } ko.renderTemplate = function (template, data, options, targetNodeOrNodeArray, renderMode) { options = options || {}; if ((options['templateEngine'] || _templateEngine) == undefined) throw "Set a template engine before calling renderTemplate"; renderMode = renderMode || "replaceChildren"; if (targetNodeOrNodeArray) { var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray); var whenToDispose = function () { return (!firstTargetNode) || !ko.utils.domNodeIsAttachedToDocument(firstTargetNode); }; // Passive disposal (on next evaluation) var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode == "replaceNode") ? firstTargetNode.parentNode : firstTargetNode; return new ko.dependentObservable( // So the DOM is automatically updated when any dependency changes function () { // Support selecting template as a function of the data being rendered var templateName = typeof(template) == 'function' ? template(data) : template; var renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, data, options); if (renderMode == "replaceNode") { targetNodeOrNodeArray = renderedNodesArray; firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray); } }, null, { 'disposeWhen': whenToDispose, 'disposeWhenNodeIsRemoved': activelyDisposeWhenNodeIsRemoved } ); } else { // We don't yet have a DOM node to evaluate, so use a memo and render the template later when there is a DOM node return ko.memoization.memoize(function (domNode) { ko.renderTemplate(template, data, options, domNode, "replaceNode"); }); } }; ko.renderTemplateForEach = function (template, arrayOrObservableArray, options, targetNode) { return new ko.dependentObservable(function () { var unwrappedArray = ko.utils.unwrapObservable(arrayOrObservableArray) || []; if (typeof unwrappedArray.length == "undefined") // Coerce single value into array unwrappedArray = [unwrappedArray]; // Filter out any entries marked as destroyed var filteredArray = ko.utils.arrayFilter(unwrappedArray, function(item) { return options['includeDestroyed'] || !item['_destroy']; }); ko.utils.setDomNodeChildrenFromArrayMapping(targetNode, filteredArray, function (arrayValue) { // Support selecting template as a function of the data being rendered var templateName = typeof(template) == 'function' ? template(arrayValue) : template; return executeTemplate(null, "ignoreTargetNode", templateName, arrayValue, options); }, options); }, null, { 'disposeWhenNodeIsRemoved': targetNode }); }; var templateSubscriptionDomDataKey = '__ko__templateSubscriptionDomDataKey__'; function disposeOldSubscriptionAndStoreNewOne(element, newSubscription) { var oldSubscription = ko.utils.domData.get(element, templateSubscriptionDomDataKey); if (oldSubscription && (typeof(oldSubscription.dispose) == 'function')) oldSubscription.dispose(); ko.utils.domData.set(element, templateSubscriptionDomDataKey, newSubscription); } ko.bindingHandlers['template'] = { 'update': function (element, valueAccessor, allBindingsAccessor, viewModel) { var bindingValue = ko.utils.unwrapObservable(valueAccessor()); var templateName = typeof bindingValue == "string" ? bindingValue : bindingValue.name; var templateSubscription; if (typeof bindingValue['foreach'] != "undefined") { // Render once for each data point templateSubscription = ko.renderTemplateForEach(templateName, bindingValue['foreach'] || [], { 'templateOptions': bindingValue['templateOptions'], 'afterAdd': bindingValue['afterAdd'], 'beforeRemove': bindingValue['beforeRemove'], 'includeDestroyed': bindingValue['includeDestroyed'], 'afterRender': bindingValue['afterRender'] }, element); } else { // Render once for this single data point (or use the viewModel if no data was provided) var templateData = bindingValue['data']; templateSubscription = ko.renderTemplate(templateName, typeof templateData == "undefined" ? viewModel : templateData, { 'templateOptions': bindingValue['templateOptions'], 'afterRender': bindingValue['afterRender'] }, element); } // It only makes sense to have a single template subscription per element (otherwise which one should have its output displayed?) disposeOldSubscriptionAndStoreNewOne(element, templateSubscription); } }; })(); ko.exportSymbol('ko.setTemplateEngine', ko.setTemplateEngine); ko.exportSymbol('ko.renderTemplate', ko.renderTemplate); (function () { // Simple calculation based on Levenshtein distance. function calculateEditDistanceMatrix(oldArray, newArray, maxAllowedDistance) { var distances = []; for (var i = 0; i <= newArray.length; i++) distances[i] = []; // Top row - transform old array into empty array via deletions for (var i = 0, j = Math.min(oldArray.length, maxAllowedDistance); i <= j; i++) distances[0][i] = i; // Left row - transform empty array into new array via additions for (var i = 1, j = Math.min(newArray.length, maxAllowedDistance); i <= j; i++) { distances[i][0] = i; } // Fill out the body of the array var oldIndex, oldIndexMax = oldArray.length, newIndex, newIndexMax = newArray.length; var distanceViaAddition, distanceViaDeletion; for (oldIndex = 1; oldIndex <= oldIndexMax; oldIndex++) { var newIndexMinForRow = Math.max(1, oldIndex - maxAllowedDistance); var newIndexMaxForRow = Math.min(newIndexMax, oldIndex + maxAllowedDistance); for (newIndex = newIndexMinForRow; newIndex <= newIndexMaxForRow; newIndex++) { if (oldArray[oldIndex - 1] === newArray[newIndex - 1]) distances[newIndex][oldIndex] = distances[newIndex - 1][oldIndex - 1]; else { var northDistance = distances[newIndex - 1][oldIndex] === undefined ? Number.MAX_VALUE : distances[newIndex - 1][oldIndex] + 1; var westDistance = distances[newIndex][oldIndex - 1] === undefined ? Number.MAX_VALUE : distances[newIndex][oldIndex - 1] + 1; distances[newIndex][oldIndex] = Math.min(northDistance, westDistance); } } } return distances; } function findEditScriptFromEditDistanceMatrix(editDistanceMatrix, oldArray, newArray) { var oldIndex = oldArray.length; var newIndex = newArray.length; var editScript = []; var maxDistance = editDistanceMatrix[newIndex][oldIndex]; if (maxDistance === undefined) return null; // maxAllowedDistance must be too small while ((oldIndex > 0) || (newIndex > 0)) { var me = editDistanceMatrix[newIndex][oldIndex]; var distanceViaAdd = (newIndex > 0) ? editDistanceMatrix[newIndex - 1][oldIndex] : maxDistance + 1; var distanceViaDelete = (oldIndex > 0) ? editDistanceMatrix[newIndex][oldIndex - 1] : maxDistance + 1; var distanceViaRetain = (newIndex > 0) && (oldIndex > 0) ? editDistanceMatrix[newIndex - 1][oldIndex - 1] : maxDistance + 1; if ((distanceViaAdd === undefined) || (distanceViaAdd < me - 1)) distanceViaAdd = maxDistance + 1; if ((distanceViaDelete === undefined) || (distanceViaDelete < me - 1)) distanceViaDelete = maxDistance + 1; if (distanceViaRetain < me - 1) distanceViaRetain = maxDistance + 1; if ((distanceViaAdd <= distanceViaDelete) && (distanceViaAdd < distanceViaRetain)) { editScript.push({ status: "added", value: newArray[newIndex - 1] }); newIndex--; } else if ((distanceViaDelete < distanceViaAdd) && (distanceViaDelete < distanceViaRetain)) { editScript.push({ status: "deleted", value: oldArray[oldIndex - 1] }); oldIndex--; } else { editScript.push({ status: "retained", value: oldArray[oldIndex - 1] }); newIndex--; oldIndex--; } } return editScript.reverse(); } ko.utils.compareArrays = function (oldArray, newArray, maxEditsToConsider) { if (maxEditsToConsider === undefined) { return ko.utils.compareArrays(oldArray, newArray, 1) // First consider likely case where there is at most one edit (very fast) || ko.utils.compareArrays(oldArray, newArray, 10) // If that fails, account for a fair number of changes while still being fast || ko.utils.compareArrays(oldArray, newArray, Number.MAX_VALUE); // Ultimately give the right answer, even though it may take a long time } else { oldArray = oldArray || []; newArray = newArray || []; var editDistanceMatrix = calculateEditDistanceMatrix(oldArray, newArray, maxEditsToConsider); return findEditScriptFromEditDistanceMatrix(editDistanceMatrix, oldArray, newArray); } }; })(); ko.exportSymbol('ko.utils.compareArrays', ko.utils.compareArrays); (function () { // Objective: // * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes, // map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node // * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node // so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we // previously mapped - retain those nodes, and just insert/delete other ones function mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap) { // Map this array value inside a dependentObservable so we re-map when any dependency changes var mappedNodes = []; var dependentObservable = ko.dependentObservable(function() { var newMappedNodes = mapping(valueToMap) || []; // On subsequent evaluations, just replace the previously-inserted DOM nodes if (mappedNodes.length > 0) ko.utils.replaceDomNodes(mappedNodes, newMappedNodes); // Replace the contents of the mappedNodes array, thereby updating the record // of which nodes would be deleted if valueToMap was itself later removed mappedNodes.splice(0, mappedNodes.length); ko.utils.arrayPushAll(mappedNodes, newMappedNodes); }, null, { 'disposeWhenNodeIsRemoved': containerNode, 'disposeWhen': function() { return (mappedNodes.length == 0) || !ko.utils.domNodeIsAttachedToDocument(mappedNodes[0]) } }); return { mappedNodes : mappedNodes, dependentObservable : dependentObservable }; } ko.utils.setDomNodeChildrenFromArrayMapping = function (domNode, array, mapping, options) { // Compare the provided array against the previous one array = array || []; options = options || {}; var isFirstExecution = ko.utils.domData.get(domNode, "setDomNodeChildrenFromArrayMapping_lastMappingResult") === undefined; var lastMappingResult = ko.utils.domData.get(domNode, "setDomNodeChildrenFromArrayMapping_lastMappingResult") || []; var lastArray = ko.utils.arrayMap(lastMappingResult, function (x) { return x.arrayEntry; }); var editScript = ko.utils.compareArrays(lastArray, array); // Build the new mapping result var newMappingResult = []; var lastMappingResultIndex = 0; var nodesToDelete = []; var nodesAdded = []; var insertAfterNode = null; for (var i = 0, j = editScript.length; i < j; i++) { switch (editScript[i].status) { case "retained": // Just keep the information - don't touch the nodes var dataToRetain = lastMappingResult[lastMappingResultIndex]; newMappingResult.push(dataToRetain); if (dataToRetain.domNodes.length > 0) insertAfterNode = dataToRetain.domNodes[dataToRetain.domNodes.length - 1]; lastMappingResultIndex++; break; case "deleted": // Stop tracking changes to the mapping for these nodes lastMappingResult[lastMappingResultIndex].dependentObservable.dispose(); // Queue these nodes for later removal ko.utils.arrayForEach(lastMappingResult[lastMappingResultIndex].domNodes, function (node) { nodesToDelete.push({ element: node, index: i, value: editScript[i].value }); insertAfterNode = node; }); lastMappingResultIndex++; break; case "added": var mapData = mapNodeAndRefreshWhenChanged(domNode, mapping, editScript[i].value); var mappedNodes = mapData.mappedNodes; // On the first evaluation, insert the nodes at the current insertion point newMappingResult.push({ arrayEntry: editScript[i].value, domNodes: mappedNodes, dependentObservable: mapData.dependentObservable }); for (var nodeIndex = 0, nodeIndexMax = mappedNodes.length; nodeIndex < nodeIndexMax; nodeIndex++) { var node = mappedNodes[nodeIndex]; nodesAdded.push({ element: node, index: i, value: editScript[i].value }); if (insertAfterNode == null) { // Insert at beginning if (domNode.firstChild) domNode.insertBefore(node, domNode.firstChild); else domNode.appendChild(node); } else { // Insert after insertion point if (insertAfterNode.nextSibling) domNode.insertBefore(node, insertAfterNode.nextSibling); else domNode.appendChild(node); } insertAfterNode = node; } break; } } ko.utils.arrayForEach(nodesToDelete, function (node) { ko.cleanNode(node.element) }); var invokedBeforeRemoveCallback = false; if (!isFirstExecution) { if (options['afterAdd']) { for (var i = 0; i < nodesAdded.length; i++) options['afterAdd'](nodesAdded[i].element, nodesAdded[i].index, nodesAdded[i].value); } if (options['beforeRemove']) { for (var i = 0; i < nodesToDelete.length; i++) options['beforeRemove'](nodesToDelete[i].element, nodesToDelete[i].index, nodesToDelete[i].value); invokedBeforeRemoveCallback = true; } } if (!invokedBeforeRemoveCallback) ko.utils.arrayForEach(nodesToDelete, function (node) { if (node.element.parentNode) node.element.parentNode.removeChild(node.element); }); // Store a copy of the array items we just considered so we can difference it next time ko.utils.domData.set(domNode, "setDomNodeChildrenFromArrayMapping_lastMappingResult", newMappingResult); } })(); ko.exportSymbol('ko.utils.setDomNodeChildrenFromArrayMapping', ko.utils.setDomNodeChildrenFromArrayMapping); ko.jqueryTmplTemplateEngine = function () { // Detect which version of jquery-tmpl you're using. Unfortunately jquery-tmpl // doesn't expose a version number, so we have to infer it. this.jQueryTmplVersion = (function() { if ((typeof(jQuery) == "undefined") || !jQuery['tmpl']) return 0; // Since it exposes no official version number, we use our own numbering system. To be updated as jquery-tmpl evolves. if (jQuery['tmpl']['tag']) { if (jQuery['tmpl']['tag']['tmpl'] && jQuery['tmpl']['tag']['tmpl']['open']) { if (jQuery['tmpl']['tag']['tmpl']['open'].toString().indexOf('__') >= 0) { return 3; // Since 1.0.0pre, custom tags should append markup to an array called "__" } } return 2; // Prior to 1.0.0pre, custom tags should append markup to an array called "_" } return 1; // Very old version doesn't have an extensible tag system })(); this['getTemplateNode'] = function (template) { var templateNode = document.getElementById(template); if (templateNode == null) throw new Error("Cannot find template with ID=" + template); return templateNode; } // These two only needed for jquery-tmpl v1 var aposMarker = "__ko_apos__"; var aposRegex = new RegExp(aposMarker, "g"); this['renderTemplate'] = function (templateId, data, options) { options = options || {}; if (this.jQueryTmplVersion == 0) throw new Error("jquery.tmpl not detected.\nTo use KO's default template engine, reference jQuery and jquery.tmpl. See Knockout installation documentation for more details."); if (this.jQueryTmplVersion == 1) { // jquery.tmpl v1 doesn't like it if the template returns just text content or nothing - it only likes you to return DOM nodes. // To make things more flexible, we can wrap the whole template in a "; var renderedMarkupInWrapper = jQuery['tmpl'](templateTextInWrapper, data); var renderedMarkup = renderedMarkupInWrapper[0].text.replace(aposRegex, "'");; return jQuery['clean']([renderedMarkup], document); } // It's easier with jquery.tmpl v2 and later - it handles any DOM structure if (!(templateId in jQuery['template'])) { // Precache a precompiled version of this template (don't want to reparse on every render) var templateText = this['getTemplateNode'](templateId).text; jQuery['template'](templateId, templateText); } data = [data]; // Prewrap the data in an array to stop jquery.tmpl from trying to unwrap any arrays var resultNodes = jQuery['tmpl'](templateId, data, options['templateOptions']); resultNodes['appendTo'](document.createElement("div")); // Using "appendTo" forces jQuery/jQuery.tmpl to perform necessary cleanup work jQuery['fragments'] = {}; // Clear jQuery's fragment cache to avoid a memory leak after a large number of template renders return resultNodes; }, this['isTemplateRewritten'] = function (templateId) { // It must already be rewritten if we've already got a cached version of it // (this optimisation helps on IE < 9, because it greatly reduces the number of getElementById calls) if (templateId in jQuery['template']) return true; return this['getTemplateNode'](templateId).isRewritten === true; }, this['rewriteTemplate'] = function (template, rewriterCallback) { var templateNode = this['getTemplateNode'](template); var rewritten = rewriterCallback(templateNode.text); if (this.jQueryTmplVersion == 1) { // jquery.tmpl v1 falls over if you use single-quotes, so replace these with a temporary marker for template rendering, // and then replace back after the template was rendered. This is slightly complicated by the fact that we must not interfere // with any code blocks - only replace apos characters outside code blocks. rewritten = ko.utils.stringTrim(rewritten); rewritten = rewritten.replace(/([\s\S]*?)(\${[\s\S]*?}|{{[\=a-z][\s\S]*?}}|$)/g, function(match) { // Called for each non-code-block followed by a code block (or end of template) var nonCodeSnippet = arguments[1]; var codeSnippet = arguments[2]; return nonCodeSnippet.replace(/\'/g, aposMarker) + codeSnippet; }); } templateNode.text = rewritten; templateNode.isRewritten = true; }, this['createJavaScriptEvaluatorBlock'] = function (script) { if (this.jQueryTmplVersion == 1) return "{{= " + script + "}}"; // From v2, jquery-tmpl does some parameter parsing that fails on nontrivial expressions. // Prevent it from messing with the code by wrapping it in a further function. return "{{ko_code ((function() { return " + script + " })()) }}"; }, this.addTemplate = function (templateName, templateMarkup) { document.write(""); } ko.exportProperty(this, 'addTemplate', this.addTemplate); if (this.jQueryTmplVersion > 1) { jQuery['tmpl']['tag']['ko_code'] = { open: (this.jQueryTmplVersion < 3 ? "_" : "__") + ".push($1 || '');" }; } }; ko.jqueryTmplTemplateEngine.prototype = new ko.templateEngine(); // Use this one by default ko.setTemplateEngine(new ko.jqueryTmplTemplateEngine()); ko.exportSymbol('ko.jqueryTmplTemplateEngine', ko.jqueryTmplTemplateEngine);})(window);