vendor/assets/javascripts/knockout.js in knockoutjs-rails-1.02 vs vendor/assets/javascripts/knockout.js in knockoutjs-rails-1.2.0

- old
+ new

@@ -1,1255 +1,72 @@ -// Knockout JavaScript library v1.02 -// (c) 2010 Steven Sanderson - http://knockoutjs.com/ -// License: Ms-Pl (http://www.opensource.org/licenses/ms-pl.html) +// Knockout JavaScript library v1.2.0 +// (c) Steven Sanderson - http://knockoutjs.com/ +// License: MIT (http://www.opensource.org/licenses/mit-license.php) -var ko = window.ko = {}; -/// <reference path="namespace.js" /> - -ko.utils = new (function () { - var stringTrimRegex = /^(\s|\u00A0)+|(\s|\u00A0)+$/g; - - return { - 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); - }, - - arrayGetDistinctValues: function (array) { - array = array || []; - var result = []; - for (var i = 0, j = array.length; i < j; i++) { - if (ko.utils.arrayIndexOf(result, array[i]) < 0) - result.push(array[i]); - } - return result; - }, - - 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; - }, - - setDomNodeChildren: function (domNode, childNodes) { - while (domNode.firstChild) { - ko.utils.domData.cleanNodeAndDescendants(domNode.firstChild); - domNode.removeChild(domNode.firstChild); - } - 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.utils.domData.cleanNodeAndDescendants(nodesToReplaceArray[i]); - parent.removeChild(nodesToReplaceArray[i]); - } - } - }, - - getElementsHavingAttribute: function (rootNode, attributeName) { - if ((!rootNode) || (rootNode.nodeType != 1)) return []; - var results = []; - if (rootNode.getAttribute(attributeName) !== null) - results.push(rootNode); - var descendants = rootNode.getElementsByTagName("*"); - for (var i = 0, j = descendants.length; i < j; i++) - if (descendants[i].getAttribute(attributeName) !== null) - results.push(descendants[i]); - return results; - }, - - 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; - }, - - evalWithinScope: function (expression, scope) { - if (scope === undefined) - return (new Function("return " + expression))(); - with (scope) { return eval("(" + expression + ")"); } - }, - - 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") - 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 element.fireEvent != "undefined") - element.fireEvent("on" + eventType); - else if (typeof document.createEvent == "function") { - if (typeof element.dispatchEvent == "function") { - var eventCategory = (eventType == "click" ? "MouseEvents" : "HTMLEvents"); // Might need to account for other event names at some point - 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 - 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; - }, - - 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 (url, data) { - 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); - } - document.body.appendChild(form); - form.submit(); - setTimeout(function () { form.parentNode.removeChild(form); }, 0); - }, - - domData: { - uniqueId: 0, - dataStoreKeyExpandoPropertyName: "__ko__" + (new Date).getTime(), - dataStore: {}, - get: function (node, key) { - var allDataForNode = ko.utils.domData.getAll(node, false); - return allDataForNode === undefined ? undefined : allDataForNode[key]; - }, - set: function (node, key, value) { - var allDataForNode = ko.utils.domData.getAll(node, true); - allDataForNode[key] = value; - }, - getAll: function (node, createIfNotFound) { - var dataStoreKey = node[ko.utils.domData.dataStoreKeyExpandoPropertyName]; - if (!dataStoreKey) { - if (!createIfNotFound) - return undefined; - dataStoreKey = node[ko.utils.domData.dataStoreKeyExpandoPropertyName] = "ko" + ko.utils.domData.uniqueId++; - ko.utils.domData[dataStoreKey] = {}; - } - return ko.utils.domData[dataStoreKey]; - }, - cleanNode: function (node) { - var dataStoreKey = node[ko.utils.domData.dataStoreKeyExpandoPropertyName]; - if (dataStoreKey) { - delete ko.utils.domData[dataStoreKey]; - node[ko.utils.domData.dataStoreKeyExpandoPropertyName] = null; - } - }, - cleanNodeAndDescendants: function (node) { - if ((node.nodeType != 1) && (node.nodeType != 9)) - return; - ko.utils.domData.cleanNode(node); - var descendants = node.getElementsByTagName("*"); - for (var i = 0, j = descendants.length; i < j; i++) - ko.utils.domData.cleanNode(descendants[i]); - } - } - } -})(); - -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))); - }; - }; -}/// <reference path="utils.js" /> - -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 "<!--[ko_memo:" + memoId + "]-->"; - }, - - 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) { - var memos = []; - findMemoNodes(domNode, memos); - for (var i = 0, j = memos.length; i < j; i++) { - var node = memos[i].domNode; - ko.memoization.unmemoize(memos[i].memoId, [node]); - 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; - } - }; -})();/// <reference path="../utils.js" /> - -ko.subscription = function (callback, disposeCallback) { - this.callback = callback; - this.dispose = disposeCallback; -}; - -ko.subscribable = function () { - var _subscriptions = []; - - this.subscribe = function (callback, callbackTarget) { - var boundCallback = callbackTarget ? function () { callback.call(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) { - if (subscription) - subscription.callback(valueToNotify); - }); - }; - - this.getSubscriptionsCount = function () { - return _subscriptions.length; - }; -} - -ko.isSubscribable = function (instance) { - return typeof instance.subscribe == "function" && typeof instance.notifySubscribers == "function"; -};/// <reference path="subscribable.js" /> - -ko.dependencyDetection = (function () { - var _detectedDependencies = []; - - return { - begin: function () { - _detectedDependencies.push([]); - }, - - end: function () { - return _detectedDependencies.pop(); - }, - - registerDependency: function (subscribable) { - if (!ko.isSubscribable(subscribable)) - throw "Only subscribable things can act as dependencies"; - if (_detectedDependencies.length > 0) { - _detectedDependencies[_detectedDependencies.length - 1].push(subscribable); - } - } - }; -})();/// <reference path="dependencyDetection.js" /> - -ko.observable = function (initialValue) { - var _latestValue = initialValue; - - function observable(newValue) { - if (arguments.length > 0) { - _latestValue = newValue; - observable.notifySubscribers(_latestValue); - } - else // The caller only needs to be notified of changes if they did a "read" operation - ko.dependencyDetection.registerDependency(observable); - - return _latestValue; - } - observable.__ko_proto__ = ko.observable; - observable.valueHasMutated = function () { observable.notifySubscribers(_latestValue); } - - ko.subscribable.call(observable); - 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) { - return (typeof instance == "function") && instance.__ko_proto__ === ko.observable; -}/// <reference path="observable.js" /> - -ko.observableArray = function (initialValues) { - 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 (!arrayOfValues) - return []; - return result.remove(function (value) { - return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0; - }); - }; - - result.indexOf = function (item) { - var underlyingArray = result(); - return ko.utils.arrayIndexOf(underlyingArray, item); - }; - - return result; -}/// <reference path="observable.js" /> - -ko.dependentObservable = function (evaluatorFunction, evaluatorFunctionTarget, options) { - if (typeof evaluatorFunction != "function") - throw "Pass a function that returns the value of the dependentObservable"; - - var _subscriptionsToDependencies = []; - function disposeAllSubscriptionsToDependencies() { - ko.utils.arrayForEach(_subscriptionsToDependencies, function (subscription) { - subscription.dispose(); - }); - _subscriptionsToDependencies = []; - } - - function replaceSubscriptionsToDependencies(newDependencies) { - disposeAllSubscriptionsToDependencies(); - ko.utils.arrayForEach(newDependencies, function (dependency) { - _subscriptionsToDependencies.push(dependency.subscribe(evaluate)); - }); - }; - - var _latestValue, _isFirstEvaluation = true; - function evaluate() { - if ((!_isFirstEvaluation) && options && typeof options.disposeWhen == "function") { - if (options.disposeWhen()) { - dependentObservable.dispose(); - return; - } - } - - try { - ko.dependencyDetection.begin(); - _latestValue = evaluatorFunctionTarget ? evaluatorFunction.call(evaluatorFunctionTarget) : evaluatorFunction(); - } catch (ex) { - throw ex; - } finally { - var distinctDependencies = ko.utils.arrayGetDistinctValues(ko.dependencyDetection.end()); - replaceSubscriptionsToDependencies(distinctDependencies); - } - - dependentObservable.notifySubscribers(_latestValue); - _isFirstEvaluation = false; - } - - function dependentObservable() { - if (arguments.length > 0) - throw "Cannot write a value to a dependentObservable. Do not pass any parameters to it"; - - ko.dependencyDetection.registerDependency(dependentObservable); - return _latestValue; - } - dependentObservable.__ko_proto__ = ko.dependentObservable; - dependentObservable.getDependenciesCount = function () { return _subscriptionsToDependencies.length; } - dependentObservable.dispose = function () { - disposeAllSubscriptionsToDependencies(); - }; - - ko.subscribable.call(dependentObservable); - evaluate(); - return dependentObservable; -}; -ko.dependentObservable.__ko_proto__ = ko.observable;/// <reference path="../utils.js" /> - -ko.jsonExpressionRewriting = (function () { - var restoreCapturedTokensRegex = /\[ko_token_(\d+)\]/g; - var javaScriptAssignmentTarget = /^[\_$a-z][\_$a-z]*(\[.*?\])*(\.[\_$a-z][\_$a-z]*(\[.*?\])*)*$/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; - } - }; -})();/// <reference path="../subscribables/dependentObservable.js" /> - -(function () { - var bindingAttributeName = "data-bind"; - ko.bindingHandlers = {}; - - function parseBindingAttribute(attributeText, viewModel) { - try { - var json = " { " + ko.jsonExpressionRewriting.insertPropertyAccessorsIntoJson(attributeText) + " } "; - return ko.utils.evalWithinScope(json, viewModel === null ? window : viewModel); - } catch (ex) { - throw new Error("Unable to parse binding attribute.\nMessage: " + ex + ";\nAttribute value: " + attributeText); - } - } - - function invokeBindingHandler(handler, element, dataValue, allBindings, viewModel) { - handler(element, dataValue, allBindings, viewModel); - } - - ko.applyBindingsToNode = function (node, bindings, viewModel) { - var isFirstEvaluation = true; - new ko.dependentObservable( - function () { - var evaluatedBindings = (typeof bindings == "function") ? bindings() : bindings; - var parsedBindings = evaluatedBindings || parseBindingAttribute(node.getAttribute(bindingAttributeName), viewModel); - for (var bindingKey in parsedBindings) { - if (ko.bindingHandlers[bindingKey]) { - if (isFirstEvaluation && typeof ko.bindingHandlers[bindingKey].init == "function") - invokeBindingHandler(ko.bindingHandlers[bindingKey].init, node, parsedBindings[bindingKey], parsedBindings, viewModel); - if (typeof ko.bindingHandlers[bindingKey].update == "function") - invokeBindingHandler(ko.bindingHandlers[bindingKey].update, node, parsedBindings[bindingKey], parsedBindings, viewModel); - } - } - }, - null, - { disposeWhen: function () { return !ko.utils.domNodeIsAttachedToDocument(node); } } - ); - isFirstEvaluation = false; - }; - - ko.applyBindings = function (rootNode, viewModel) { - var elemsWithBindingAttribute = ko.utils.getElementsHavingAttribute(rootNode, bindingAttributeName); - ko.utils.arrayForEach(elemsWithBindingAttribute, function (element) { - ko.applyBindingsToNode(element, null, viewModel); - }); - }; -})();/// <reference path="bindingAttributeSyntax.js" /> - -ko.bindingHandlers.click = { - init: function (element, value, allBindings, viewModel) { - ko.utils.registerEventHandler(element, "click", function (event) { - try { value.call(viewModel); } - finally { - if (event.preventDefault) - event.preventDefault(); - else - event.returnValue = false; - } - }); - } -}; - -ko.bindingHandlers.submit = { - init: function (element, value, allBindings, viewModel) { - if (typeof value != "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) { - try { value.call(viewModel); } - finally { - if (event.preventDefault) - event.preventDefault(); - else - event.returnValue = false; - } - }); - } -}; - -ko.bindingHandlers.visible = { - update: function (element, value) { - value = ko.utils.unwrapObservable(value); - 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, value) { - value = ko.utils.unwrapObservable(value); - if (value && element.disabled) - element.removeAttribute("disabled"); - else if ((!value) && (!element.disabled)) - element.disabled = true; - } -}; - -ko.bindingHandlers.disable = { update: function (element, value) { ko.bindingHandlers.enable.update(element, !ko.utils.unwrapObservable(value)); } }; - -ko.bindingHandlers.value = { - init: function (element, value, allBindings) { - var eventName = allBindings.valueUpdate || "change"; - if (ko.isWriteableObservable(value)) - ko.utils.registerEventHandler(element, eventName, function () { value(this.value); }); - else if (allBindings._ko_property_writers && allBindings._ko_property_writers.value) - ko.utils.registerEventHandler(element, eventName, function () { allBindings._ko_property_writers.value(this.value); }); - }, - update: function (element, value) { - var newValue = ko.utils.unwrapObservable(value); - - if (newValue != element.value) { - var applyValueAction = function () { element.value = 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); - } - } -}; - -ko.bindingHandlers.options = { - update: function (element, value, allBindings) { - if (element.tagName != "SELECT") - throw new Error("values 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 node.value || node.innerText || node.textContent; - }); - - value = ko.utils.unwrapObservable(value); - var selectedValue = element.value; - element.innerHTML = ""; - if (value) { - if (typeof value.length != "number") - value = [value]; - for (var i = 0, j = value.length; i < j; i++) { - var option = document.createElement("OPTION"); - var optionValue = typeof allBindings.options_value == "string" ? value[i][allBindings.options_value] : value[i]; - option.value = optionValue.toString(); - option.innerHTML = (typeof allBindings.options_text == "string" ? value[i][allBindings.options_text] : optionValue).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"); - for (var i = 0, j = newOptions.length; i < j; i++) { - if (ko.utils.arrayIndexOf(previousSelectedValues, newOptions[i].value) >= 0) - newOptions[i].selected = true; - } - } - } -}; - -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(node.value); - } - return result; - }, - init: function (element, value, allBindings) { - if (ko.isWriteableObservable(value)) - ko.utils.registerEventHandler(element, "change", function () { value(ko.bindingHandlers.selectedOptions.getSelectedValuesFromSelectNode(this)); }); - else if (allBindings._ko_property_writers && allBindings._ko_property_writers.value) - ko.utils.registerEventHandler(element, "change", function () { allBindings._ko_property_writers.value(ko.bindingHandlers.selectedOptions.getSelectedValuesFromSelectNode(this)); }); - }, - update: function (element, value) { - if (element.tagName != "SELECT") - throw new Error("values binding applies only to SELECT elements"); - - var newValue = ko.utils.unwrapObservable(value); - 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") - node.selected = ko.utils.arrayIndexOf(newValue, node.value) >= 0; - } - } - } -}; - -ko.bindingHandlers.text = { - update: function (element, value) { - value = ko.utils.unwrapObservable(value); - typeof element.innerText == "string" ? element.innerText = value - : element.textContent = value; - } -}; - -ko.bindingHandlers.css = { - update: function (element, value) { - value = value || {}; - for (var className in value) { - if (typeof className == "string") { - var shouldHaveClass = ko.utils.unwrapObservable(value[className]); - ko.utils.toggleDomNodeCssClass(element, className, shouldHaveClass); - } - } - } -}; - -ko.bindingHandlers.uniqueName = { - init: function (element, value) { - if (value) - element.name = "ko_unique_" + (++ko.bindingHandlers.uniqueName.currentIndex); - } -}; -ko.bindingHandlers.uniqueName.currentIndex = 0; - -ko.bindingHandlers.checked = { - init: function (element, value, allBindings) { - if (ko.isWriteableObservable(value)) { - var updateHandler; - if (element.type == "checkbox") - updateHandler = function () { value(this.checked) }; - else if (element.type == "radio") - updateHandler = function () { if (this.checked) value(this.value) }; - if (updateHandler) { - ko.utils.registerEventHandler(element, "change", updateHandler); - ko.utils.registerEventHandler(element, "click", updateHandler); - } - } else if (allBindings._ko_property_writers && allBindings._ko_property_writers.checked) { - var updateHandler; - if (element.type == "checkbox") - updateHandler = function () { allBindings._ko_property_writers.checked(this.checked) }; - else if (element.type == "radio") - updateHandler = function () { if (this.checked) allBindings._ko_property_writers.checked(this.value) }; - if (updateHandler) { - ko.utils.registerEventHandler(element, "change", updateHandler); - ko.utils.registerEventHandler(element, "click", updateHandler); - } - } - }, - update: function (element, value) { - value = ko.utils.unwrapObservable(value); - if (element.type == "checkbox") - element.checked = value; - else if (element.type == "radio") - element.checked = (element.value == value); - } -};/// <reference path="../utils.js" /> - -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"; - } -};/// <reference path="templateEngine.js" /> - -ko.templateRewriting = (function () { - var memoizeBindingAttributeSyntaxRegex = /(<[a-z]+(\s+(?!data-bind=)[a-z0-9]+(=(\"[^\"]*\"|\'[^\']*\'))?)*\s+)data-bind=(["'])(.*?)\5/g; - - 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) { - if (domNode.nextSibling) - ko.applyBindingsToNode(domNode.nextSibling, bindings, null); - }); - } - } -})();/// <reference path="templating.js" /> -/// <reference path="../subscribables/dependentObservable.js" /> - -(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); - }); - - 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); - } - - 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); }; - - return new ko.dependentObservable( // So the DOM is automatically updated when any dependency changes - function () { - var renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, template, data, options); - if (renderMode == "replaceNode") { - targetNodeOrNodeArray = renderedNodesArray; - firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray); - } - }, - null, - { disposeWhen: whenToDispose } - ); - } 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) { - var whenToDispose = function () { return !ko.utils.domNodeIsAttachedToDocument(targetNode); }; - - new ko.dependentObservable(function () { - var unwrappedArray = ko.utils.unwrapObservable(arrayOrObservableArray); - if (typeof unwrappedArray.length == "undefined") // Coerce single value into array - unwrappedArray = [unwrappedArray]; - - ko.utils.setDomNodeChildrenFromArrayMapping(targetNode, unwrappedArray, function (arrayValue) { - return executeTemplate(null, "ignoreTargetNode", template, arrayValue, options); - }, options); - }, null, { disposeWhen: whenToDispose }); - }; - - ko.bindingHandlers.template = { - update: function (element, bindingValue, allBindings, viewModel) { - var templateName = typeof bindingValue == "string" ? bindingValue : bindingValue.name; - - if (typeof bindingValue.foreach != "undefined") { - // Render once for each data point - ko.renderTemplateForEach(templateName, bindingValue.foreach || [], { afterAdd: bindingValue.afterAdd, beforeRemove: bindingValue.beforeRemove }, element); - } - else { - // Render once for this single data point (or use the viewModel if no data was provided) - var templateData = bindingValue.data; - ko.renderTemplate(templateName, typeof templateData == "undefined" ? viewModel : templateData, null, element); - } - } - }; -})();/// <reference path="../../utils.js" /> - -// Simple calculation based on Levenshtein distance. -(function () { - - 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); - } - }; -})();/// <reference path="compareArrays.js" /> - -(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 - - 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": - // Queue these nodes for later removal - ko.utils.arrayForEach(lastMappingResult[lastMappingResultIndex].domNodes, function (node) { - nodesToDelete.push(node); - insertAfterNode = node; - }); - lastMappingResultIndex++; - break; - - case "added": - // Map this array value and insert the resulting nodes at the current insertion point - var mappedNodes = mapping(editScript[i].value) || []; - newMappingResult.push({ arrayEntry: editScript[i].value, domNodes: mappedNodes }); - for (var nodeIndex = 0, nodeIndexMax = mappedNodes.length; nodeIndex < nodeIndexMax; nodeIndex++) { - var node = mappedNodes[nodeIndex]; - nodesAdded.push(node); - 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.utils.domData.cleanNodeAndDescendants(node); }); - - var invokedBeforeRemoveCallback = false; - if (!isFirstExecution) { - if (options.afterAdd) - options.afterAdd(nodesAdded); - if (options.beforeRemove) { - options.beforeRemove(nodesToDelete); - invokedBeforeRemoveCallback = true; - } - } - if (!invokedBeforeRemoveCallback) - ko.utils.arrayForEach(nodesToDelete, function (node) { - if (node.parentNode) - node.parentNode.removeChild(node); - }); - - // 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); - } -})();/// <reference path="../templating.js" /> - -ko.jqueryTmplTemplateEngine = function () { - function getTemplateNode(template) { - var templateNode = document.getElementById(template); - if (templateNode == null) - throw new Error("Cannot find template with ID=" + template); - return templateNode; - } - - this.renderTemplate = function (template, data, options) { - // jquery.tmpl 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 <script> node so that jquery.tmpl just processes it as - // text and doesn't try to parse the output. 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