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Diffstat (limited to 'samples/OAuth2ProtectedWebApi/Scripts/knockout-2.3.0.debug.js')
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1 files changed, 3676 insertions, 0 deletions
diff --git a/samples/OAuth2ProtectedWebApi/Scripts/knockout-2.3.0.debug.js b/samples/OAuth2ProtectedWebApi/Scripts/knockout-2.3.0.debug.js new file mode 100644 index 0000000..1888c27 --- /dev/null +++ b/samples/OAuth2ProtectedWebApi/Scripts/knockout-2.3.0.debug.js @@ -0,0 +1,3676 @@ +// Knockout JavaScript library v2.3.0 +// (c) Steven Sanderson - http://knockoutjs.com/ +// License: MIT (http://www.opensource.org/licenses/mit-license.php) + +(function(){ +var DEBUG=true; +(function(undefined){ + // (0, eval)('this') is a robust way of getting a reference to the global object + // For details, see http://stackoverflow.com/questions/14119988/return-this-0-evalthis/14120023#14120023 + var window = this || (0, eval)('this'), + document = window['document'], + navigator = window['navigator'], + jQuery = window["jQuery"], + JSON = window["JSON"]; +(function(factory) { + // Support three module loading scenarios + if (typeof require === 'function' && typeof exports === 'object' && typeof module === 'object') { + // [1] CommonJS/Node.js + var target = module['exports'] || exports; // module.exports is for Node.js + factory(target); + } else if (typeof define === 'function' && define['amd']) { + // [2] AMD anonymous module + define(['exports'], factory); + } else { + // [3] No module loader (plain <script> tag) - put directly in global namespace + factory(window['ko'] = {}); + } +}(function(koExports){ +// Internally, all KO objects are attached to koExports (even the non-exported ones whose names will be minified by the closure compiler). +// In the future, the following "ko" variable may be made distinct from "koExports" so that private objects are not externally reachable. +var ko = typeof koExports !== 'undefined' ? koExports : {}; +// Google Closure Compiler helpers (used only to make the minified file smaller) +ko.exportSymbol = function(koPath, object) { + var tokens = koPath.split("."); + + // In the future, "ko" may become distinct from "koExports" (so that non-exported objects are not reachable) + // At that point, "target" would be set to: (typeof koExports !== "undefined" ? koExports : ko) + var target = ko; + + 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.version = "2.3.0"; + +ko.exportSymbol('version', ko.version); +ko.utils = (function () { + var objectForEach = function(obj, action) { + for (var prop in obj) { + if (obj.hasOwnProperty(prop)) { + action(prop, obj[prop]); + } + } + }; + + // Represent the known event types in a compact way, then at runtime transform it into a hash with event name as key (for fast lookup) + var knownEvents = {}, knownEventTypesByEventName = {}; + var keyEventTypeName = (navigator && /Firefox\/2/i.test(navigator.userAgent)) ? 'KeyboardEvent' : 'UIEvents'; + knownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress']; + knownEvents['MouseEvents'] = ['click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover', 'mouseout', 'mouseenter', 'mouseleave']; + objectForEach(knownEvents, function(eventType, knownEventsForType) { + if (knownEventsForType.length) { + for (var i = 0, j = knownEventsForType.length; i < j; i++) + knownEventTypesByEventName[knownEventsForType[i]] = eventType; + } + }); + var eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true }; // Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406 + + // Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness) + // Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10. + // Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser. + // If there is a future need to detect specific versions of IE10+, we will amend this. + var ieVersion = document && (function() { + var version = 3, div = document.createElement('div'), iElems = div.getElementsByTagName('i'); + + // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment + while ( + div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->', + iElems[0] + ) {} + return version > 4 ? version : undefined; + }()); + var isIe6 = ieVersion === 6, + isIe7 = ieVersion === 7; + + function isClickOnCheckableElement(element, eventType) { + if ((ko.utils.tagNameLower(element) !== "input") || !element.type) return false; + if (eventType.toLowerCase() != "click") return false; + var inputType = element.type; + 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.prototype.indexOf == "function") + return Array.prototype.indexOf.call(array, 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; + }, + + arrayPushAll: function (array, valuesToPush) { + if (valuesToPush instanceof Array) + array.push.apply(array, valuesToPush); + else + for (var i = 0, j = valuesToPush.length; i < j; i++) + array.push(valuesToPush[i]); + return array; + }, + + addOrRemoveItem: function(array, value, included) { + var existingEntryIndex = array.indexOf ? array.indexOf(value) : ko.utils.arrayIndexOf(array, value); + if (existingEntryIndex < 0) { + if (included) + array.push(value); + } else { + if (!included) + array.splice(existingEntryIndex, 1); + } + }, + + extend: function (target, source) { + if (source) { + for(var prop in source) { + if(source.hasOwnProperty(prop)) { + target[prop] = source[prop]; + } + } + } + return target; + }, + + objectForEach: objectForEach, + + emptyDomNode: function (domNode) { + while (domNode.firstChild) { + ko.removeNode(domNode.firstChild); + } + }, + + moveCleanedNodesToContainerElement: function(nodes) { + // Ensure it's a real array, as we're about to reparent the nodes and + // we don't want the underlying collection to change while we're doing that. + var nodesArray = ko.utils.makeArray(nodes); + + var container = document.createElement('div'); + for (var i = 0, j = nodesArray.length; i < j; i++) { + container.appendChild(ko.cleanNode(nodesArray[i])); + } + return container; + }, + + cloneNodes: function (nodesArray, shouldCleanNodes) { + for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) { + var clonedNode = nodesArray[i].cloneNode(true); + newNodesArray.push(shouldCleanNodes ? ko.cleanNode(clonedNode) : clonedNode); + } + return newNodesArray; + }, + + setDomNodeChildren: function (domNode, childNodes) { + ko.utils.emptyDomNode(domNode); + if (childNodes) { + for (var i = 0, j = childNodes.length; i < j; i++) + domNode.appendChild(childNodes[i]); + } + }, + + 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 (ieVersion < 7) + optionNode.setAttribute("selected", isSelected); + else + optionNode.selected = isSelected; + }, + + stringTrim: function (string) { + return string === null || string === undefined ? '' : + string.trim ? + string.trim() : + string.toString().replace(/^[\s\xa0]+|[\s\xa0]+$/g, ''); + }, + + 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; + }, + + 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, node.ownerDocument); + }, + + anyDomNodeIsAttachedToDocument: function(nodes) { + return !!ko.utils.arrayFirst(nodes, ko.utils.domNodeIsAttachedToDocument); + }, + + tagNameLower: function(element) { + // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case. + // Possible future optimization: If we know it's an element from an XHTML document (not HTML), + // we don't need to do the .toLowerCase() as it will always be lower case anyway. + return element && element.tagName && element.tagName.toLowerCase(); + }, + + registerEventHandler: function (element, eventType, handler) { + var mustUseAttachEvent = ieVersion && eventsThatMustBeRegisteredUsingAttachEvent[eventType]; + if (!mustUseAttachEvent && 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 (!mustUseAttachEvent && typeof element.addEventListener == "function") + element.addEventListener(eventType, handler, false); + else if (typeof element.attachEvent != "undefined") { + var attachEventHandler = function (event) { handler.call(element, event); }, + attachEventName = "on" + eventType; + element.attachEvent(attachEventName, attachEventHandler); + + // IE does not dispose attachEvent handlers automatically (unlike with addEventListener) + // so to avoid leaks, we have to remove them manually. See bug #856 + ko.utils.domNodeDisposal.addDisposeCallback(element, function() { + element.detachEvent(attachEventName, attachEventHandler); + }); + } 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 = knownEventTypesByEventName[eventType] || "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 (isClickOnCheckableElement(element, eventType)) + 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; + }, + + peekObservable: function (value) { + return ko.isObservable(value) ? value.peek() : value; + }, + + toggleDomNodeCssClass: function (node, classNames, shouldHaveClass) { + if (classNames) { + var cssClassNameRegex = /\S+/g, + currentClassNames = node.className.match(cssClassNameRegex) || []; + ko.utils.arrayForEach(classNames.match(cssClassNameRegex), function(className) { + ko.utils.addOrRemoveItem(currentClassNames, className, shouldHaveClass); + }); + node.className = currentClassNames.join(" "); + } + }, + + setTextContent: function(element, textContent) { + var value = ko.utils.unwrapObservable(textContent); + if ((value === null) || (value === undefined)) + value = ""; + + // We need there to be exactly one child: a text node. + // If there are no children, more than one, or if it's not a text node, + // we'll clear everything and create a single text node. + var innerTextNode = ko.virtualElements.firstChild(element); + if (!innerTextNode || innerTextNode.nodeType != 3 || ko.virtualElements.nextSibling(innerTextNode)) { + ko.virtualElements.setDomNodeChildren(element, [document.createTextNode(value)]); + } else { + innerTextNode.data = value; + } + + ko.utils.forceRefresh(element); + }, + + setElementName: function(element, name) { + element.name = name; + + // Workaround IE 6/7 issue + // - https://github.com/SteveSanderson/knockout/issues/197 + // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/ + if (ieVersion <= 7) { + try { + element.mergeAttributes(document.createElement("<input name='" + element.name + "'/>"), false); + } + catch(e) {} // For IE9 with doc mode "IE9 Standards" and browser mode "IE9 Compatibility View" + } + }, + + forceRefresh: function(node) { + // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209 + if (ieVersion >= 9) { + // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container + var elem = node.nodeType == 1 ? node : node.parentNode; + if (elem.style) + elem.style.zoom = elem.style.zoom; + } + }, + + ensureSelectElementIsRenderedCorrectly: function(selectElement) { + // Workaround for IE9 rendering bug - it doesn't reliably display all the text in dynamically-added select boxes unless you force it to re-render by updating the width. + // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option) + // Also fixes IE7 and IE8 bug that causes selects to be zero width if enclosed by 'if' or 'with'. (See issue #839) + if (ieVersion) { + var originalWidth = selectElement.style.width; + selectElement.style.width = 0; + selectElement.style.width = originalWidth; + } + }, + + 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 = 0, j = arrayLikeObject.length; i < j; i++) { + result.push(arrayLikeObject[i]); + }; + return result; + }, + + isIe6 : isIe6, + isIe7 : isIe7, + ieVersion : ieVersion, + + 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 (JSON && JSON.parse) // Use native parsing where available + return JSON.parse(jsonString); + return (new Function("return " + jsonString))(); // Fallback on less safe parsing for older browsers + } + } + return null; + }, + + stringifyJson: function (data, replacer, space) { // replacer and space are optional + if (!JSON || !JSON.stringify) + 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), replacer, space); + }, + + 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') && (ko.utils.tagNameLower(urlOrForm) === "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) { + // Since 'data' this is a model object, we include all properties including those inherited from its prototype + var input = document.createElement("input"); + input.name = key; + input.value = ko.utils.stringifyJson(ko.utils.unwrapObservable(data[key])); + form.appendChild(input); + } + objectForEach(params, function(key, value) { + var input = document.createElement("input"); + input.name = key; + input.value = value; + form.appendChild(input); + }); + document.body.appendChild(form); + options['submitter'] ? options['submitter'](form) : form.submit(); + setTimeout(function () { form.parentNode.removeChild(form); }, 0); + } + } +}()); + +ko.exportSymbol('utils', ko.utils); +ko.exportSymbol('utils.arrayForEach', ko.utils.arrayForEach); +ko.exportSymbol('utils.arrayFirst', ko.utils.arrayFirst); +ko.exportSymbol('utils.arrayFilter', ko.utils.arrayFilter); +ko.exportSymbol('utils.arrayGetDistinctValues', ko.utils.arrayGetDistinctValues); +ko.exportSymbol('utils.arrayIndexOf', ko.utils.arrayIndexOf); +ko.exportSymbol('utils.arrayMap', ko.utils.arrayMap); +ko.exportSymbol('utils.arrayPushAll', ko.utils.arrayPushAll); +ko.exportSymbol('utils.arrayRemoveItem', ko.utils.arrayRemoveItem); +ko.exportSymbol('utils.extend', ko.utils.extend); +ko.exportSymbol('utils.fieldsIncludedWithJsonPost', ko.utils.fieldsIncludedWithJsonPost); +ko.exportSymbol('utils.getFormFields', ko.utils.getFormFields); +ko.exportSymbol('utils.peekObservable', ko.utils.peekObservable); +ko.exportSymbol('utils.postJson', ko.utils.postJson); +ko.exportSymbol('utils.parseJson', ko.utils.parseJson); +ko.exportSymbol('utils.registerEventHandler', ko.utils.registerEventHandler); +ko.exportSymbol('utils.stringifyJson', ko.utils.stringifyJson); +ko.exportSymbol('utils.range', ko.utils.range); +ko.exportSymbol('utils.toggleDomNodeCssClass', ko.utils.toggleDomNodeCssClass); +ko.exportSymbol('utils.triggerEvent', ko.utils.triggerEvent); +ko.exportSymbol('utils.unwrapObservable', ko.utils.unwrapObservable); +ko.exportSymbol('utils.objectForEach', ko.utils.objectForEach); +ko.exportSymbol('utils.addOrRemoveItem', ko.utils.addOrRemoveItem); +ko.exportSymbol('unwrap', ko.utils.unwrapObservable); // Convenient shorthand, because this is used so commonly + +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]; + var hasExistingDataStore = dataStoreKey && (dataStoreKey !== "null") && dataStore[dataStoreKey]; + if (!hasExistingDataStore) { + 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; + return true; // Exposing "did clean" flag purely so specs can infer whether things have been cleaned up as intended + } + return false; + } + } +})(); + +ko.exportSymbol('utils.domData', ko.utils.domData); +ko.exportSymbol('utils.domData.clear', ko.utils.domData.clear); // Exporting only so specs can clear up after themselves fully + +ko.utils.domNodeDisposal = new (function () { + var domDataKey = "__ko_domNodeDisposal__" + (new Date).getTime(); + var cleanableNodeTypes = { 1: true, 8: true, 9: true }; // Element, Comment, Document + var cleanableNodeTypesWithDescendants = { 1: true, 9: true }; // Element, Document + + 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]); + + // Also clear any immediate-child comment nodes, as these wouldn't have been found by + // node.getElementsByTagName("*") in cleanNode() (comment nodes aren't elements) + if (cleanableNodeTypesWithDescendants[node.nodeType]) + cleanImmediateCommentTypeChildren(node); + } + + function cleanImmediateCommentTypeChildren(nodeWithChildren) { + var child, nextChild = nodeWithChildren.firstChild; + while (child = nextChild) { + nextChild = child.nextSibling; + if (child.nodeType === 8) + cleanSingleNode(child); + } + } + + 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) { + // First clean this node, where applicable + if (cleanableNodeTypes[node.nodeType]) { + cleanSingleNode(node); + + // ... then its descendants, where applicable + if (cleanableNodeTypesWithDescendants[node.nodeType]) { + // 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]); + } + } + return node; + }, + + 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('cleanNode', ko.cleanNode); +ko.exportSymbol('removeNode', ko.removeNode); +ko.exportSymbol('utils.domNodeDisposal', ko.utils.domNodeDisposal); +ko.exportSymbol('utils.domNodeDisposal.addDisposeCallback', ko.utils.domNodeDisposal.addDisposeCallback); +ko.exportSymbol('utils.domNodeDisposal.removeDisposeCallback', ko.utils.domNodeDisposal.removeDisposeCallback); +(function () { + var leadingCommentRegex = /^(\s*)<!--(.*?)-->/; + + function simpleHtmlParse(html) { + // Based on jQuery's "clean" function, but only accounting for table-related elements. + // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's "clean" function directly + + // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of + // a descendant node. For example: "<div><!-- mycomment -->abc</div>" will get parsed as "<div>abc</div>" + // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node + // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present. + + // Trim whitespace, otherwise indexOf won't work as expected + var tags = ko.utils.stringTrim(html).toLowerCase(), div = document.createElement("div"); + + // Finds the first match from the left column, and returns the corresponding "wrap" data from the right column + var wrap = tags.match(/^<(thead|tbody|tfoot)/) && [1, "<table>", "</table>"] || + !tags.indexOf("<tr") && [2, "<table><tbody>", "</tbody></table>"] || + (!tags.indexOf("<td") || !tags.indexOf("<th")) && [3, "<table><tbody><tr>", "</tr></tbody></table>"] || + /* anything else */ [0, "", ""]; + + // Go to html and back, then peel off extra wrappers + // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness. + var markup = "ignored<div>" + wrap[1] + html + wrap[2] + "</div>"; + if (typeof window['innerShiv'] == "function") { + div.appendChild(window['innerShiv'](markup)); + } else { + div.innerHTML = markup; + } + + // Move to the right depth + while (wrap[0]--) + div = div.lastChild; + + return ko.utils.makeArray(div.lastChild.childNodes); + } + + function jQueryHtmlParse(html) { + // jQuery's "parseHTML" function was introduced in jQuery 1.8.0 and is a documented public API. + if (jQuery['parseHTML']) { + return jQuery['parseHTML'](html) || []; // Ensure we always return an array and never null + } else { + // For jQuery < 1.8.0, we fall back on the undocumented internal "clean" function. + var elems = jQuery['clean']([html]); + + // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment. + // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time. + // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment. + if (elems && elems[0]) { + // Find the top-most parent element that's a direct child of a document fragment + var elem = elems[0]; + while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */) + elem = elem.parentNode; + // ... then detach it + if (elem.parentNode) + elem.parentNode.removeChild(elem); + } + + return elems; + } + } + + ko.utils.parseHtmlFragment = function(html) { + return typeof jQuery != 'undefined' ? jQueryHtmlParse(html) // As below, benefit from jQuery's optimisations where possible + : simpleHtmlParse(html); // ... otherwise, this simple logic will do in most common cases. + }; + + ko.utils.setHtml = function(node, html) { + ko.utils.emptyDomNode(node); + + // There's no legitimate reason to display a stringified observable without unwrapping it, so we'll unwrap it + html = ko.utils.unwrapObservable(html); + + if ((html !== null) && (html !== undefined)) { + if (typeof html != 'string') + html = html.toString(); + + // jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments, + // for example <tr> elements which are not normally allowed to exist on their own. + // If you've referenced jQuery we'll use that rather than duplicating its code. + if (typeof jQuery != 'undefined') { + jQuery(node)['html'](html); + } else { + // ... otherwise, use KO's own parsing logic. + var parsedNodes = ko.utils.parseHtmlFragment(html); + for (var i = 0; i < parsedNodes.length; i++) + node.appendChild(parsedNodes[i]); + } + } + }; +})(); + +ko.exportSymbol('utils.parseHtmlFragment', ko.utils.parseHtmlFragment); +ko.exportSymbol('utils.setHtml', ko.utils.setHtml); + +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, 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('memoization', ko.memoization); +ko.exportSymbol('memoization.memoize', ko.memoization.memoize); +ko.exportSymbol('memoization.unmemoize', ko.memoization.unmemoize); +ko.exportSymbol('memoization.parseMemoText', ko.memoization.parseMemoText); +ko.exportSymbol('memoization.unmemoizeDomNodeAndDescendants', ko.memoization.unmemoizeDomNodeAndDescendants); +ko.extenders = { + 'throttle': function(target, timeout) { + // Throttling means two things: + + // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies + // notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate + target['throttleEvaluation'] = timeout; + + // (2) For writable targets (observables, or writable dependent observables), we throttle *writes* + // so the target cannot change value synchronously or faster than a certain rate + var writeTimeoutInstance = null; + return ko.dependentObservable({ + 'read': target, + 'write': function(value) { + clearTimeout(writeTimeoutInstance); + writeTimeoutInstance = setTimeout(function() { + target(value); + }, timeout); + } + }); + }, + + 'notify': function(target, notifyWhen) { + target["equalityComparer"] = notifyWhen == "always" + ? function() { return false } // Treat all values as not equal + : ko.observable["fn"]["equalityComparer"]; + return target; + } +}; + +function applyExtenders(requestedExtenders) { + var target = this; + if (requestedExtenders) { + ko.utils.objectForEach(requestedExtenders, function(key, value) { + var extenderHandler = ko.extenders[key]; + if (typeof extenderHandler == 'function') { + target = extenderHandler(target, value); + } + }); + } + return target; +} + +ko.exportSymbol('extenders', ko.extenders); + +ko.subscription = function (target, callback, disposeCallback) { + this.target = target; + this.callback = callback; + this.disposeCallback = disposeCallback; + ko.exportProperty(this, 'dispose', this.dispose); +}; +ko.subscription.prototype.dispose = function () { + this.isDisposed = true; + this.disposeCallback(); +}; + +ko.subscribable = function () { + this._subscriptions = {}; + + ko.utils.extend(this, ko.subscribable['fn']); + ko.exportProperty(this, 'subscribe', this.subscribe); + ko.exportProperty(this, 'extend', this.extend); + ko.exportProperty(this, 'getSubscriptionsCount', this.getSubscriptionsCount); +} + +var defaultEvent = "change"; + +ko.subscribable['fn'] = { + subscribe: function (callback, callbackTarget, event) { + event = event || defaultEvent; + var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback; + + var subscription = new ko.subscription(this, boundCallback, function () { + ko.utils.arrayRemoveItem(this._subscriptions[event], subscription); + }.bind(this)); + + if (!this._subscriptions[event]) + this._subscriptions[event] = []; + this._subscriptions[event].push(subscription); + return subscription; + }, + + "notifySubscribers": function (valueToNotify, event) { + event = event || defaultEvent; + if (this._subscriptions[event]) { + ko.dependencyDetection.ignore(function() { + ko.utils.arrayForEach(this._subscriptions[event].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 () { + var total = 0; + ko.utils.objectForEach(this._subscriptions, function(eventName, subscriptions) { + total += subscriptions.length; + }); + return total; + }, + + extend: applyExtenders +}; + + +ko.isSubscribable = function (instance) { + return instance != null && typeof instance.subscribe == "function" && typeof instance["notifySubscribers"] == "function"; +}; + +ko.exportSymbol('subscribable', ko.subscribable); +ko.exportSymbol('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 new Error("Only subscribable things can act as dependencies"); + if (_frames.length > 0) { + var topFrame = _frames[_frames.length - 1]; + if (!topFrame || ko.utils.arrayIndexOf(topFrame.distinctDependencies, subscribable) >= 0) + return; + topFrame.distinctDependencies.push(subscribable); + topFrame.callback(subscribable); + } + }, + + ignore: function(callback, callbackTarget, callbackArgs) { + try { + _frames.push(null); + return callback.apply(callbackTarget, callbackArgs || []); + } finally { + _frames.pop(); + } + } + }; +})(); +var primitiveTypes = { 'undefined':true, 'boolean':true, 'number':true, 'string':true }; + +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])) { + observable.valueWillMutate(); + _latestValue = arguments[0]; + if (DEBUG) observable._latestValue = _latestValue; + observable.valueHasMutated(); + } + 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; + } + } + if (DEBUG) observable._latestValue = _latestValue; + ko.subscribable.call(observable); + observable.peek = function() { return _latestValue }; + observable.valueHasMutated = function () { observable["notifySubscribers"](_latestValue); } + observable.valueWillMutate = function () { observable["notifySubscribers"](_latestValue, "beforeChange"); } + ko.utils.extend(observable, ko.observable['fn']); + + ko.exportProperty(observable, 'peek', observable.peek); + ko.exportProperty(observable, "valueHasMutated", observable.valueHasMutated); + ko.exportProperty(observable, "valueWillMutate", observable.valueWillMutate); + + return observable; +} + +ko.observable['fn'] = { + "equalityComparer": function valuesArePrimitiveAndEqual(a, b) { + var oldValueIsPrimitive = (a === null) || (typeof(a) in primitiveTypes); + return oldValueIsPrimitive ? (a === b) : false; + } +}; + +var protoProperty = ko.observable.protoProperty = "__ko_proto__"; +ko.observable['fn'][protoProperty] = ko.observable; + +ko.hasPrototype = function(instance, prototype) { + if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined)) return false; + if (instance[protoProperty] === prototype) return true; + return ko.hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain +}; + +ko.isObservable = function (instance) { + return ko.hasPrototype(instance, ko.observable); +} +ko.isWriteableObservable = function (instance) { + // Observable + if ((typeof instance == "function") && instance[protoProperty] === ko.observable) + return true; + // Writeable dependent observable + if ((typeof instance == "function") && (instance[protoProperty] === ko.dependentObservable) && (instance.hasWriteFunction)) + return true; + // Anything else + return false; +} + + +ko.exportSymbol('observable', ko.observable); +ko.exportSymbol('isObservable', ko.isObservable); +ko.exportSymbol('isWriteableObservable', ko.isWriteableObservable); +ko.observableArray = function (initialValues) { + initialValues = initialValues || []; + + if (typeof initialValues != 'object' || !('length' in initialValues)) + throw new Error("The argument passed when initializing an observable array must be an array, or null, or undefined."); + + var result = ko.observable(initialValues); + ko.utils.extend(result, ko.observableArray['fn']); + return result; +}; + +ko.observableArray['fn'] = { + 'remove': function (valueOrPredicate) { + var underlyingArray = this.peek(); + var removedValues = []; + var predicate = typeof valueOrPredicate == "function" ? valueOrPredicate : function (value) { return value === valueOrPredicate; }; + for (var i = 0; i < underlyingArray.length; i++) { + var value = underlyingArray[i]; + if (predicate(value)) { + if (removedValues.length === 0) { + this.valueWillMutate(); + } + removedValues.push(value); + underlyingArray.splice(i, 1); + i--; + } + } + if (removedValues.length) { + this.valueHasMutated(); + } + return removedValues; + }, + + 'removeAll': function (arrayOfValues) { + // If you passed zero args, we remove everything + if (arrayOfValues === undefined) { + var underlyingArray = this.peek(); + var allValues = underlyingArray.slice(0); + this.valueWillMutate(); + underlyingArray.splice(0, underlyingArray.length); + this.valueHasMutated(); + return allValues; + } + // If you passed an arg, we interpret it as an array of entries to remove + if (!arrayOfValues) + return []; + return this['remove'](function (value) { + return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0; + }); + }, + + 'destroy': function (valueOrPredicate) { + var underlyingArray = this.peek(); + var predicate = typeof valueOrPredicate == "function" ? valueOrPredicate : function (value) { return value === valueOrPredicate; }; + this.valueWillMutate(); + for (var i = underlyingArray.length - 1; i >= 0; i--) { + var value = underlyingArray[i]; + if (predicate(value)) + underlyingArray[i]["_destroy"] = true; + } + this.valueHasMutated(); + }, + + 'destroyAll': function (arrayOfValues) { + // If you passed zero args, we destroy everything + if (arrayOfValues === undefined) + return this['destroy'](function() { return true }); + + // If you passed an arg, we interpret it as an array of entries to destroy + if (!arrayOfValues) + return []; + return this['destroy'](function (value) { + return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0; + }); + }, + + 'indexOf': function (item) { + var underlyingArray = this(); + return ko.utils.arrayIndexOf(underlyingArray, item); + }, + + 'replace': function(oldItem, newItem) { + var index = this['indexOf'](oldItem); + if (index >= 0) { + this.valueWillMutate(); + this.peek()[index] = newItem; + this.valueHasMutated(); + } + } +}; + +// Populate ko.observableArray.fn with read/write functions from native arrays +// Important: Do not add any additional functions here that may reasonably be used to *read* data from the array +// because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale +ko.utils.arrayForEach(["pop", "push", "reverse", "shift", "sort", "splice", "unshift"], function (methodName) { + ko.observableArray['fn'][methodName] = function () { + // Use "peek" to avoid creating a subscription in any computed that we're executing in the context of + // (for consistency with mutating regular observables) + var underlyingArray = this.peek(); + this.valueWillMutate(); + var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments); + this.valueHasMutated(); + return methodCallResult; + }; +}); + +// Populate ko.observableArray.fn with read-only functions from native arrays +ko.utils.arrayForEach(["slice"], function (methodName) { + ko.observableArray['fn'][methodName] = function () { + var underlyingArray = this(); + return underlyingArray[methodName].apply(underlyingArray, arguments); + }; +}); + +ko.exportSymbol('observableArray', ko.observableArray); +ko.dependentObservable = function (evaluatorFunctionOrOptions, evaluatorFunctionTarget, options) { + var _latestValue, + _hasBeenEvaluated = false, + _isBeingEvaluated = false, + readFunction = evaluatorFunctionOrOptions; + + if (readFunction && typeof readFunction == "object") { + // Single-parameter syntax - everything is on this "options" param + options = readFunction; + readFunction = options["read"]; + } else { + // Multi-parameter syntax - construct the options according to the params passed + options = options || {}; + if (!readFunction) + readFunction = options["read"]; + } + if (typeof readFunction != "function") + throw new Error("Pass a function that returns the value of the ko.computed"); + + function addSubscriptionToDependency(subscribable) { + _subscriptionsToDependencies.push(subscribable.subscribe(evaluatePossiblyAsync)); + } + + function disposeAllSubscriptionsToDependencies() { + ko.utils.arrayForEach(_subscriptionsToDependencies, function (subscription) { + subscription.dispose(); + }); + _subscriptionsToDependencies = []; + } + + function evaluatePossiblyAsync() { + var throttleEvaluationTimeout = dependentObservable['throttleEvaluation']; + if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) { + clearTimeout(evaluationTimeoutInstance); + evaluationTimeoutInstance = setTimeout(evaluateImmediate, throttleEvaluationTimeout); + } else + evaluateImmediate(); + } + + function evaluateImmediate() { + if (_isBeingEvaluated) { + // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation. + // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost + // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing + // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387 + return; + } + + // 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 && disposeWhen()) { + dispose(); + return; + } + + _isBeingEvaluated = true; + try { + // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal). + // Then, during evaluation, we cross off any that are in fact still being used. + var disposalCandidates = ko.utils.arrayMap(_subscriptionsToDependencies, function(item) {return item.target;}); + + ko.dependencyDetection.begin(function(subscribable) { + var inOld; + if ((inOld = ko.utils.arrayIndexOf(disposalCandidates, subscribable)) >= 0) + disposalCandidates[inOld] = undefined; // Don't want to dispose this subscription, as it's still being used + else + addSubscriptionToDependency(subscribable); // Brand new subscription - add it + }); + + var newValue = readFunction.call(evaluatorFunctionTarget); + + // For each subscription no longer being used, remove it from the active subscriptions list and dispose it + for (var i = disposalCandidates.length - 1; i >= 0; i--) { + if (disposalCandidates[i]) + _subscriptionsToDependencies.splice(i, 1)[0].dispose(); + } + _hasBeenEvaluated = true; + + dependentObservable["notifySubscribers"](_latestValue, "beforeChange"); + + _latestValue = newValue; + if (DEBUG) dependentObservable._latestValue = _latestValue; + dependentObservable["notifySubscribers"](_latestValue); + + } finally { + ko.dependencyDetection.end(); + _isBeingEvaluated = false; + } + + if (!_subscriptionsToDependencies.length) + dispose(); + } + + function dependentObservable() { + if (arguments.length > 0) { + if (typeof writeFunction === "function") { + // Writing a value + writeFunction.apply(evaluatorFunctionTarget, arguments); + } else { + throw new Error("Cannot write a value to a ko.computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters."); + } + return this; // Permits chained assignments + } else { + // Reading the value + if (!_hasBeenEvaluated) + evaluateImmediate(); + ko.dependencyDetection.registerDependency(dependentObservable); + return _latestValue; + } + } + + function peek() { + if (!_hasBeenEvaluated) + evaluateImmediate(); + return _latestValue; + } + + function isActive() { + return !_hasBeenEvaluated || _subscriptionsToDependencies.length > 0; + } + + // By here, "options" is always non-null + var writeFunction = options["write"], + disposeWhenNodeIsRemoved = options["disposeWhenNodeIsRemoved"] || options.disposeWhenNodeIsRemoved || null, + disposeWhen = options["disposeWhen"] || options.disposeWhen || function() { return false; }, + dispose = disposeAllSubscriptionsToDependencies, + _subscriptionsToDependencies = [], + evaluationTimeoutInstance = null; + + if (!evaluatorFunctionTarget) + evaluatorFunctionTarget = options["owner"]; + + dependentObservable.peek = peek; + dependentObservable.getDependenciesCount = function () { return _subscriptionsToDependencies.length; }; + dependentObservable.hasWriteFunction = typeof options["write"] === "function"; + dependentObservable.dispose = function () { dispose(); }; + dependentObservable.isActive = isActive; + + ko.subscribable.call(dependentObservable); + ko.utils.extend(dependentObservable, ko.dependentObservable['fn']); + + ko.exportProperty(dependentObservable, 'peek', dependentObservable.peek); + ko.exportProperty(dependentObservable, 'dispose', dependentObservable.dispose); + ko.exportProperty(dependentObservable, 'isActive', dependentObservable.isActive); + ko.exportProperty(dependentObservable, 'getDependenciesCount', dependentObservable.getDependenciesCount); + + // Evaluate, unless deferEvaluation is true + if (options['deferEvaluation'] !== true) + evaluateImmediate(); + + // Build "disposeWhenNodeIsRemoved" and "disposeWhenNodeIsRemovedCallback" option values. + // But skip if isActive is false (there will never be any dependencies to dispose). + // (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.) + if (disposeWhenNodeIsRemoved && isActive()) { + dispose = function() { + ko.utils.domNodeDisposal.removeDisposeCallback(disposeWhenNodeIsRemoved, dispose); + disposeAllSubscriptionsToDependencies(); + }; + ko.utils.domNodeDisposal.addDisposeCallback(disposeWhenNodeIsRemoved, dispose); + var existingDisposeWhenFunction = disposeWhen; + disposeWhen = function () { + return !ko.utils.domNodeIsAttachedToDocument(disposeWhenNodeIsRemoved) || existingDisposeWhenFunction(); + } + } + + return dependentObservable; +}; + +ko.isComputed = function(instance) { + return ko.hasPrototype(instance, ko.dependentObservable); +}; + +var protoProp = ko.observable.protoProperty; // == "__ko_proto__" +ko.dependentObservable[protoProp] = ko.observable; + +ko.dependentObservable['fn'] = {}; +ko.dependentObservable['fn'][protoProp] = ko.dependentObservable; + +ko.exportSymbol('dependentObservable', ko.dependentObservable); +ko.exportSymbol('computed', ko.dependentObservable); // Make "ko.computed" an alias for "ko.dependentObservable" +ko.exportSymbol('isComputed', ko.isComputed); + +(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, replacer, space) { // replacer and space are optional + var plainJavaScriptObject = ko.toJS(rootObject); + return ko.utils.stringifyJson(plainJavaScriptObject, replacer, space); + }; + + function mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) { + visitedObjects = visitedObjects || new objectLookup(); + + rootObject = mapInputCallback(rootObject); + var canHaveProperties = (typeof rootObject == "object") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof Date)) && (!(rootObject instanceof String)) && (!(rootObject instanceof Number)) && (!(rootObject instanceof Boolean)); + 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); + + // For arrays, also respect toJSON property for custom mappings (fixes #278) + if (typeof rootObject['toJSON'] == 'function') + visitorCallback('toJSON'); + } else { + for (var propertyName in rootObject) { + visitorCallback(propertyName); + } + } + }; + + function objectLookup() { + this.keys = []; + this.values = []; + }; + + objectLookup.prototype = { + constructor: objectLookup, + save: function(key, value) { + var existingIndex = ko.utils.arrayIndexOf(this.keys, key); + if (existingIndex >= 0) + this.values[existingIndex] = value; + else { + this.keys.push(key); + this.values.push(value); + } + }, + get: function(key) { + var existingIndex = ko.utils.arrayIndexOf(this.keys, key); + return (existingIndex >= 0) ? this.values[existingIndex] : undefined; + } + }; +})(); + +ko.exportSymbol('toJS', ko.toJS); +ko.exportSymbol('toJSON', ko.toJSON); +(function () { + var hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__'; + + // 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) { + switch (ko.utils.tagNameLower(element)) { + case 'option': + if (element[hasDomDataExpandoProperty] === true) + return ko.utils.domData.get(element, ko.bindingHandlers.options.optionValueDomDataKey); + return ko.utils.ieVersion <= 7 + ? (element.getAttributeNode('value') && element.getAttributeNode('value').specified ? element.value : element.text) + : element.value; + case 'select': + return element.selectedIndex >= 0 ? ko.selectExtensions.readValue(element.options[element.selectedIndex]) : undefined; + default: + return element.value; + } + }, + + writeValue: function(element, value) { + switch (ko.utils.tagNameLower(element)) { + case 'option': + switch(typeof value) { + case "string": + ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, undefined); + if (hasDomDataExpandoProperty in element) { // IE <= 8 throws errors if you delete non-existent properties from a DOM node + delete element[hasDomDataExpandoProperty]; + } + element.value = value; + break; + default: + // Store arbitrary object using DomData + ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, value); + element[hasDomDataExpandoProperty] = true; + + // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value. + element.value = typeof value === "number" ? value : ""; + break; + } + break; + case 'select': + if (value === "") + value = undefined; + if (value === null || value === undefined) + element.selectedIndex = -1; + for (var i = element.options.length - 1; i >= 0; i--) { + if (ko.selectExtensions.readValue(element.options[i]) == value) { + element.selectedIndex = i; + break; + } + } + // for drop-down select, ensure first is selected + if (!(element.size > 1) && element.selectedIndex === -1) { + element.selectedIndex = 0; + } + break; + default: + if ((value === null) || (value === undefined)) + value = ""; + element.value = value; + break; + } + } + }; +})(); + +ko.exportSymbol('selectExtensions', ko.selectExtensions); +ko.exportSymbol('selectExtensions.readValue', ko.selectExtensions.readValue); +ko.exportSymbol('selectExtensions.writeValue', ko.selectExtensions.writeValue); +ko.expressionRewriting = (function () { + var restoreCapturedTokensRegex = /\@ko_token_(\d+)\@/g; + var javaScriptReservedWords = ["true", "false", "null", "undefined"]; + + // Matches something that can be assigned to--either an isolated identifier or something ending with a property accessor + // This is designed to be simple and avoid false negatives, but could produce false positives (e.g., a+b.c). + var javaScriptAssignmentTarget = /^(?:[$_a-z][$\w]*|(.+)(\.\s*[$_a-z][$\w]*|\[.+\]))$/i; + + function restoreTokens(string, tokens) { + var prevValue = null; + while (string != prevValue) { // Keep restoring tokens until it no longer makes a difference (they may be nested) + prevValue = string; + string = string.replace(restoreCapturedTokensRegex, function (match, tokenIndex) { + return tokens[tokenIndex]; + }); + } + return string; + } + + function getWriteableValue(expression) { + if (ko.utils.arrayIndexOf(javaScriptReservedWords, ko.utils.stringTrim(expression).toLowerCase()) >= 0) + return false; + var match = expression.match(javaScriptAssignmentTarget); + return match === null ? false : match[1] ? ('Object(' + match[1] + ')' + match[2]) : expression; + } + + function ensureQuoted(key) { + var trimmedKey = ko.utils.stringTrim(key); + switch (trimmedKey.length && trimmedKey.charAt(0)) { + case "'": + case '"': + return key; + default: + return "'" + trimmedKey + "'"; + } + } + + return { + bindingRewriteValidators: [], + + parseObjectLiteral: function(objectLiteralString) { + // A full tokeniser+lexer would add too much weight to this library, so here's a simple parser + // that is sufficient just to split an object literal string into a set of top-level key-value pairs + + var str = ko.utils.stringTrim(objectLiteralString); + if (str.length < 3) + return []; + if (str.charAt(0) === "{")// Ignore any braces surrounding the whole object literal + str = str.substring(1, str.length - 1); + + // Pull out any string literals and regex literals + var tokens = []; + var tokenStart = null, tokenEndChar; + for (var position = 0; position < str.length; position++) { + var c = str.charAt(position); + if (tokenStart === null) { + switch (c) { + case '"': + case "'": + case "/": + tokenStart = position; + tokenEndChar = c; + break; + } + } else if ((c == tokenEndChar) && (str.charAt(position - 1) !== "\\")) { + var token = str.substring(tokenStart, position + 1); + tokens.push(token); + var replacement = "@ko_token_" + (tokens.length - 1) + "@"; + str = str.substring(0, tokenStart) + replacement + str.substring(position + 1); + position -= (token.length - replacement.length); + tokenStart = null; + } + } + + // Next pull out balanced paren, brace, and bracket blocks + tokenStart = null; + tokenEndChar = null; + var tokenDepth = 0, tokenStartChar = null; + for (var position = 0; position < str.length; position++) { + var c = str.charAt(position); + if (tokenStart === null) { + switch (c) { + case "{": tokenStart = position; tokenStartChar = c; + tokenEndChar = "}"; + break; + case "(": tokenStart = position; tokenStartChar = c; + tokenEndChar = ")"; + break; + case "[": tokenStart = position; tokenStartChar = c; + tokenEndChar = "]"; + break; + } + } + + if (c === tokenStartChar) + tokenDepth++; + else if (c === tokenEndChar) { + tokenDepth--; + if (tokenDepth === 0) { + var token = str.substring(tokenStart, position + 1); + tokens.push(token); + var replacement = "@ko_token_" + (tokens.length - 1) + "@"; + str = str.substring(0, tokenStart) + replacement + str.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 = str.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 = pair.substring(0, colonPos); + var value = pair.substring(colonPos + 1); + result.push({ 'key': restoreTokens(key, tokens), 'value': restoreTokens(value, tokens) }); + } else { + result.push({ 'unknown': restoreTokens(pair, tokens) }); + } + } + return result; + }, + + preProcessBindings: function (objectLiteralStringOrKeyValueArray) { + var keyValueArray = typeof objectLiteralStringOrKeyValueArray === "string" + ? ko.expressionRewriting.parseObjectLiteral(objectLiteralStringOrKeyValueArray) + : objectLiteralStringOrKeyValueArray; + var resultStrings = [], propertyAccessorResultStrings = []; + + var keyValueEntry; + for (var i = 0; keyValueEntry = keyValueArray[i]; i++) { + if (resultStrings.length > 0) + resultStrings.push(","); + + if (keyValueEntry['key']) { + var quotedKey = ensureQuoted(keyValueEntry['key']), val = keyValueEntry['value']; + resultStrings.push(quotedKey); + resultStrings.push(":"); + resultStrings.push(val); + + if (val = getWriteableValue(ko.utils.stringTrim(val))) { + if (propertyAccessorResultStrings.length > 0) + propertyAccessorResultStrings.push(", "); + propertyAccessorResultStrings.push(quotedKey + " : function(__ko_value) { " + val + " = __ko_value; }"); + } + } else if (keyValueEntry['unknown']) { + resultStrings.push(keyValueEntry['unknown']); + } + } + + var combinedResult = resultStrings.join(""); + if (propertyAccessorResultStrings.length > 0) { + var allPropertyAccessors = propertyAccessorResultStrings.join(""); + combinedResult = combinedResult + ", '_ko_property_writers' : { " + allPropertyAccessors + " } "; + } + + return combinedResult; + }, + + keyValueArrayContainsKey: function(keyValueArray, key) { + for (var i = 0; i < keyValueArray.length; i++) + if (ko.utils.stringTrim(keyValueArray[i]['key']) == key) + return true; + return false; + }, + + // Internal, private KO utility for updating model properties from within bindings + // property: If the property being updated is (or might be) an observable, pass it here + // If it turns out to be a writable observable, it will be written to directly + // allBindingsAccessor: All bindings in the current execution context. + // This will be searched for a '_ko_property_writers' property in case you're writing to a non-observable + // key: The key identifying the property to be written. Example: for { hasFocus: myValue }, write to 'myValue' by specifying the key 'hasFocus' + // value: The value to be written + // checkIfDifferent: If true, and if the property being written is a writable observable, the value will only be written if + // it is !== existing value on that writable observable + writeValueToProperty: function(property, allBindingsAccessor, key, value, checkIfDifferent) { + if (!property || !ko.isObservable(property)) { + var propWriters = allBindingsAccessor()['_ko_property_writers']; + if (propWriters && propWriters[key]) + propWriters[key](value); + } else if (ko.isWriteableObservable(property) && (!checkIfDifferent || property.peek() !== value)) { + property(value); + } + } + }; +})(); + +ko.exportSymbol('expressionRewriting', ko.expressionRewriting); +ko.exportSymbol('expressionRewriting.bindingRewriteValidators', ko.expressionRewriting.bindingRewriteValidators); +ko.exportSymbol('expressionRewriting.parseObjectLiteral', ko.expressionRewriting.parseObjectLiteral); +ko.exportSymbol('expressionRewriting.preProcessBindings', ko.expressionRewriting.preProcessBindings); + +// For backward compatibility, define the following aliases. (Previously, these function names were misleading because +// they referred to JSON specifically, even though they actually work with arbitrary JavaScript object literal expressions.) +ko.exportSymbol('jsonExpressionRewriting', ko.expressionRewriting); +ko.exportSymbol('jsonExpressionRewriting.insertPropertyAccessorsIntoJson', ko.expressionRewriting.preProcessBindings);(function() { + // "Virtual elements" is an abstraction on top of the usual DOM API which understands the notion that comment nodes + // may be used to represent hierarchy (in addition to the DOM's natural hierarchy). + // If you call the DOM-manipulating functions on ko.virtualElements, you will be able to read and write the state + // of that virtual hierarchy + // + // The point of all this is to support containerless templates (e.g., <!-- ko foreach:someCollection -->blah<!-- /ko -->) + // without having to scatter special cases all over the binding and templating code. + + // IE 9 cannot reliably read the "nodeValue" property of a comment node (see https://github.com/SteveSanderson/knockout/issues/186) + // but it does give them a nonstandard alternative property called "text" that it can read reliably. Other browsers don't have that property. + // So, use node.text where available, and node.nodeValue elsewhere + var commentNodesHaveTextProperty = document && document.createComment("test").text === "<!--test-->"; + + var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*ko(?:\s+(.+\s*\:[\s\S]*))?\s*-->$/ : /^\s*ko(?:\s+(.+\s*\:[\s\S]*))?\s*$/; + var endCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*\/ko\s*-->$/ : /^\s*\/ko\s*$/; + var htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true }; + + function isStartComment(node) { + return (node.nodeType == 8) && (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex); + } + + function isEndComment(node) { + return (node.nodeType == 8) && (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(endCommentRegex); + } + + function getVirtualChildren(startComment, allowUnbalanced) { + var currentNode = startComment; + var depth = 1; + var children = []; + while (currentNode = currentNode.nextSibling) { + if (isEndComment(currentNode)) { + depth--; + if (depth === 0) + return children; + } + + children.push(currentNode); + + if (isStartComment(currentNode)) + depth++; + } + if (!allowUnbalanced) + throw new Error("Cannot find closing comment tag to match: " + startComment.nodeValue); + return null; + } + + function getMatchingEndComment(startComment, allowUnbalanced) { + var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced); + if (allVirtualChildren) { + if (allVirtualChildren.length > 0) + return allVirtualChildren[allVirtualChildren.length - 1].nextSibling; + return startComment.nextSibling; + } else + return null; // Must have no matching end comment, and allowUnbalanced is true + } + + function getUnbalancedChildTags(node) { + // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span> + // from <div>OK</div><!-- /ko --><!-- /ko -->, returns: <!-- /ko --><!-- /ko --> + var childNode = node.firstChild, captureRemaining = null; + if (childNode) { + do { + if (captureRemaining) // We already hit an unbalanced node and are now just scooping up all subsequent nodes + captureRemaining.push(childNode); + else if (isStartComment(childNode)) { + var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true); + if (matchingEndComment) // It's a balanced tag, so skip immediately to the end of this virtual set + childNode = matchingEndComment; + else + captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point + } else if (isEndComment(childNode)) { + captureRemaining = [childNode]; // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing + } + } while (childNode = childNode.nextSibling); + } + return captureRemaining; + } + + ko.virtualElements = { + allowedBindings: {}, + + childNodes: function(node) { + return isStartComment(node) ? getVirtualChildren(node) : node.childNodes; + }, + + emptyNode: function(node) { + if (!isStartComment(node)) + ko.utils.emptyDomNode(node); + else { + var virtualChildren = ko.virtualElements.childNodes(node); + for (var i = 0, j = virtualChildren.length; i < j; i++) + ko.removeNode(virtualChildren[i]); + } + }, + + setDomNodeChildren: function(node, childNodes) { + if (!isStartComment(node)) + ko.utils.setDomNodeChildren(node, childNodes); + else { + ko.virtualElements.emptyNode(node); + var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children + for (var i = 0, j = childNodes.length; i < j; i++) + endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode); + } + }, + + prepend: function(containerNode, nodeToPrepend) { + if (!isStartComment(containerNode)) { + if (containerNode.firstChild) + containerNode.insertBefore(nodeToPrepend, containerNode.firstChild); + else + containerNode.appendChild(nodeToPrepend); + } else { + // Start comments must always have a parent and at least one following sibling (the end comment) + containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling); + } + }, + + insertAfter: function(containerNode, nodeToInsert, insertAfterNode) { + if (!insertAfterNode) { + ko.virtualElements.prepend(containerNode, nodeToInsert); + } else if (!isStartComment(containerNode)) { + // Insert after insertion point + if (insertAfterNode.nextSibling) + containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling); + else + containerNode.appendChild(nodeToInsert); + } else { + // Children of start comments must always have a parent and at least one following sibling (the end comment) + containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling); + } + }, + + firstChild: function(node) { + if (!isStartComment(node)) + return node.firstChild; + if (!node.nextSibling || isEndComment(node.nextSibling)) + return null; + return node.nextSibling; + }, + + nextSibling: function(node) { + if (isStartComment(node)) + node = getMatchingEndComment(node); + if (node.nextSibling && isEndComment(node.nextSibling)) + return null; + return node.nextSibling; + }, + + virtualNodeBindingValue: function(node) { + var regexMatch = isStartComment(node); + return regexMatch ? regexMatch[1] : null; + }, + + normaliseVirtualElementDomStructure: function(elementVerified) { + // Workaround for https://github.com/SteveSanderson/knockout/issues/155 + // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes + // that are direct descendants of <ul> into the preceding <li>) + if (!htmlTagsWithOptionallyClosingChildren[ko.utils.tagNameLower(elementVerified)]) + return; + + // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags + // must be intended to appear *after* that child, so move them there. + var childNode = elementVerified.firstChild; + if (childNode) { + do { + if (childNode.nodeType === 1) { + var unbalancedTags = getUnbalancedChildTags(childNode); + if (unbalancedTags) { + // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child + var nodeToInsertBefore = childNode.nextSibling; + for (var i = 0; i < unbalancedTags.length; i++) { + if (nodeToInsertBefore) + elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore); + else + elementVerified.appendChild(unbalancedTags[i]); + } + } + } + } while (childNode = childNode.nextSibling); + } + } + }; +})(); +ko.exportSymbol('virtualElements', ko.virtualElements); +ko.exportSymbol('virtualElements.allowedBindings', ko.virtualElements.allowedBindings); +ko.exportSymbol('virtualElements.emptyNode', ko.virtualElements.emptyNode); +//ko.exportSymbol('virtualElements.firstChild', ko.virtualElements.firstChild); // firstChild is not minified +ko.exportSymbol('virtualElements.insertAfter', ko.virtualElements.insertAfter); +//ko.exportSymbol('virtualElements.nextSibling', ko.virtualElements.nextSibling); // nextSibling is not minified +ko.exportSymbol('virtualElements.prepend', ko.virtualElements.prepend); +ko.exportSymbol('virtualElements.setDomNodeChildren', ko.virtualElements.setDomNodeChildren); +(function() { + var defaultBindingAttributeName = "data-bind"; + + ko.bindingProvider = function() { + this.bindingCache = {}; + }; + + ko.utils.extend(ko.bindingProvider.prototype, { + 'nodeHasBindings': function(node) { + switch (node.nodeType) { + case 1: return node.getAttribute(defaultBindingAttributeName) != null; // Element + case 8: return ko.virtualElements.virtualNodeBindingValue(node) != null; // Comment node + default: return false; + } + }, + + 'getBindings': function(node, bindingContext) { + var bindingsString = this['getBindingsString'](node, bindingContext); + return bindingsString ? this['parseBindingsString'](bindingsString, bindingContext, node) : null; + }, + + // The following function is only used internally by this default provider. + // It's not part of the interface definition for a general binding provider. + 'getBindingsString': function(node, bindingContext) { + switch (node.nodeType) { + case 1: return node.getAttribute(defaultBindingAttributeName); // Element + case 8: return ko.virtualElements.virtualNodeBindingValue(node); // Comment node + default: return null; + } + }, + + // The following function is only used internally by this default provider. + // It's not part of the interface definition for a general binding provider. + 'parseBindingsString': function(bindingsString, bindingContext, node) { + try { + var bindingFunction = createBindingsStringEvaluatorViaCache(bindingsString, this.bindingCache); + return bindingFunction(bindingContext, node); + } catch (ex) { + ex.message = "Unable to parse bindings.\nBindings value: " + bindingsString + "\nMessage: " + ex.message; + throw ex; + } + } + }); + + ko.bindingProvider['instance'] = new ko.bindingProvider(); + + function createBindingsStringEvaluatorViaCache(bindingsString, cache) { + var cacheKey = bindingsString; + return cache[cacheKey] + || (cache[cacheKey] = createBindingsStringEvaluator(bindingsString)); + } + + function createBindingsStringEvaluator(bindingsString) { + // Build the source for a function that evaluates "expression" + // For each scope variable, add an extra level of "with" nesting + // Example result: with(sc1) { with(sc0) { return (expression) } } + var rewrittenBindings = ko.expressionRewriting.preProcessBindings(bindingsString), + functionBody = "with($context){with($data||{}){return{" + rewrittenBindings + "}}}"; + return new Function("$context", "$element", functionBody); + } +})(); + +ko.exportSymbol('bindingProvider', ko.bindingProvider); +(function () { + ko.bindingHandlers = {}; + + ko.bindingContext = function(dataItem, parentBindingContext, dataItemAlias) { + if (parentBindingContext) { + ko.utils.extend(this, parentBindingContext); // Inherit $root and any custom properties + this['$parentContext'] = parentBindingContext; + this['$parent'] = parentBindingContext['$data']; + this['$parents'] = (parentBindingContext['$parents'] || []).slice(0); + this['$parents'].unshift(this['$parent']); + } else { + this['$parents'] = []; + this['$root'] = dataItem; + // Export 'ko' in the binding context so it will be available in bindings and templates + // even if 'ko' isn't exported as a global, such as when using an AMD loader. + // See https://github.com/SteveSanderson/knockout/issues/490 + this['ko'] = ko; + } + this['$data'] = dataItem; + if (dataItemAlias) + this[dataItemAlias] = dataItem; + } + ko.bindingContext.prototype['createChildContext'] = function (dataItem, dataItemAlias) { + return new ko.bindingContext(dataItem, this, dataItemAlias); + }; + ko.bindingContext.prototype['extend'] = function(properties) { + var clone = ko.utils.extend(new ko.bindingContext(), this); + return ko.utils.extend(clone, properties); + }; + + function validateThatBindingIsAllowedForVirtualElements(bindingName) { + var validator = ko.virtualElements.allowedBindings[bindingName]; + if (!validator) + throw new Error("The binding '" + bindingName + "' cannot be used with virtual elements") + } + + function applyBindingsToDescendantsInternal (viewModel, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement) { + var currentChild, nextInQueue = ko.virtualElements.firstChild(elementOrVirtualElement); + while (currentChild = nextInQueue) { + // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position + nextInQueue = ko.virtualElements.nextSibling(currentChild); + applyBindingsToNodeAndDescendantsInternal(viewModel, currentChild, bindingContextsMayDifferFromDomParentElement); + } + } + + function applyBindingsToNodeAndDescendantsInternal (viewModel, nodeVerified, bindingContextMayDifferFromDomParentElement) { + var shouldBindDescendants = true; + + // Perf optimisation: Apply bindings only if... + // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context) + // Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those + // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template) + var isElement = (nodeVerified.nodeType === 1); + if (isElement) // Workaround IE <= 8 HTML parsing weirdness + ko.virtualElements.normaliseVirtualElementDomStructure(nodeVerified); + + var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement) // Case (1) + || ko.bindingProvider['instance']['nodeHasBindings'](nodeVerified); // Case (2) + if (shouldApplyBindings) + shouldBindDescendants = applyBindingsToNodeInternal(nodeVerified, null, viewModel, bindingContextMayDifferFromDomParentElement).shouldBindDescendants; + + if (shouldBindDescendants) { + // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So, + // * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode, + // hence bindingContextsMayDifferFromDomParentElement is false + // * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may + // skip over any number of intermediate virtual elements, any of which might define a custom binding context, + // hence bindingContextsMayDifferFromDomParentElement is true + applyBindingsToDescendantsInternal(viewModel, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement); + } + } + + var boundElementDomDataKey = '__ko_boundElement'; + function applyBindingsToNodeInternal (node, bindings, viewModelOrBindingContext, bindingContextMayDifferFromDomParentElement) { + // Need to be sure that inits are only run once, and updates never run until all the inits have been run + var initPhase = 0; // 0 = before all inits, 1 = during inits, 2 = after all inits + + // 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 bindingHandlerThatControlsDescendantBindings; + + // Prevent multiple applyBindings calls for the same node, except when a binding value is specified + var alreadyBound = ko.utils.domData.get(node, boundElementDomDataKey); + if (!bindings) { + if (alreadyBound) { + throw Error("You cannot apply bindings multiple times to the same element."); + } + ko.utils.domData.set(node, boundElementDomDataKey, true); + } + + ko.dependentObservable( + function () { + // Ensure we have a nonnull binding context to work with + var bindingContextInstance = viewModelOrBindingContext && (viewModelOrBindingContext instanceof ko.bindingContext) + ? viewModelOrBindingContext + : new ko.bindingContext(ko.utils.unwrapObservable(viewModelOrBindingContext)); + var viewModel = bindingContextInstance['$data']; + + // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because + // we can easily recover it just by scanning up the node's ancestors in the DOM + // (note: here, parent node means "real DOM parent" not "virtual parent", as there's no O(1) way to find the virtual parent) + if (!alreadyBound && bindingContextMayDifferFromDomParentElement) + ko.storedBindingContextForNode(node, bindingContextInstance); + + // Use evaluatedBindings if given, otherwise fall back on asking the bindings provider to give us some bindings + var evaluatedBindings = (typeof bindings == "function") ? bindings(bindingContextInstance, node) : bindings; + parsedBindings = evaluatedBindings || ko.bindingProvider['instance']['getBindings'](node, bindingContextInstance); + + if (parsedBindings) { + // First run all the inits, so bindings can register for notification on changes + if (initPhase === 0) { + initPhase = 1; + ko.utils.objectForEach(parsedBindings, function(bindingKey) { + var binding = ko.bindingHandlers[bindingKey]; + if (binding && node.nodeType === 8) + validateThatBindingIsAllowedForVirtualElements(bindingKey); + + if (binding && typeof binding["init"] == "function") { + var handlerInitFn = binding["init"]; + var initResult = handlerInitFn(node, makeValueAccessor(bindingKey), parsedBindingsAccessor, viewModel, bindingContextInstance); + + // If this binding handler claims to control descendant bindings, make a note of this + if (initResult && initResult['controlsDescendantBindings']) { + if (bindingHandlerThatControlsDescendantBindings !== undefined) + throw new Error("Multiple bindings (" + bindingHandlerThatControlsDescendantBindings + " and " + bindingKey + ") are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element."); + bindingHandlerThatControlsDescendantBindings = bindingKey; + } + } + }); + initPhase = 2; + } + + // ... then run all the updates, which might trigger changes even on the first evaluation + if (initPhase === 2) { + ko.utils.objectForEach(parsedBindings, function(bindingKey) { + var binding = ko.bindingHandlers[bindingKey]; + if (binding && typeof binding["update"] == "function") { + var handlerUpdateFn = binding["update"]; + handlerUpdateFn(node, makeValueAccessor(bindingKey), parsedBindingsAccessor, viewModel, bindingContextInstance); + } + }); + } + } + }, + null, + { disposeWhenNodeIsRemoved : node } + ); + + return { + shouldBindDescendants: bindingHandlerThatControlsDescendantBindings === undefined + }; + }; + + var storedBindingContextDomDataKey = "__ko_bindingContext__"; + ko.storedBindingContextForNode = function (node, bindingContext) { + if (arguments.length == 2) + ko.utils.domData.set(node, storedBindingContextDomDataKey, bindingContext); + else + return ko.utils.domData.get(node, storedBindingContextDomDataKey); + } + + ko.applyBindingsToNode = function (node, bindings, viewModel) { + if (node.nodeType === 1) // If it's an element, workaround IE <= 8 HTML parsing weirdness + ko.virtualElements.normaliseVirtualElementDomStructure(node); + return applyBindingsToNodeInternal(node, bindings, viewModel, true); + }; + + ko.applyBindingsToDescendants = function(viewModel, rootNode) { + if (rootNode.nodeType === 1 || rootNode.nodeType === 8) + applyBindingsToDescendantsInternal(viewModel, rootNode, true); + }; + + ko.applyBindings = function (viewModel, rootNode) { + if (rootNode && (rootNode.nodeType !== 1) && (rootNode.nodeType !== 8)) + 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, true); + }; + + // Retrieving binding context from arbitrary nodes + ko.contextFor = function(node) { + // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them) + switch (node.nodeType) { + case 1: + case 8: + var context = ko.storedBindingContextForNode(node); + if (context) return context; + if (node.parentNode) return ko.contextFor(node.parentNode); + break; + } + return undefined; + }; + ko.dataFor = function(node) { + var context = ko.contextFor(node); + return context ? context['$data'] : undefined; + }; + + ko.exportSymbol('bindingHandlers', ko.bindingHandlers); + ko.exportSymbol('applyBindings', ko.applyBindings); + ko.exportSymbol('applyBindingsToDescendants', ko.applyBindingsToDescendants); + ko.exportSymbol('applyBindingsToNode', ko.applyBindingsToNode); + ko.exportSymbol('contextFor', ko.contextFor); + ko.exportSymbol('dataFor', ko.dataFor); +})(); +var attrHtmlToJavascriptMap = { 'class': 'className', 'for': 'htmlFor' }; +ko.bindingHandlers['attr'] = { + 'update': function(element, valueAccessor, allBindingsAccessor) { + var value = ko.utils.unwrapObservable(valueAccessor()) || {}; + ko.utils.objectForEach(value, function(attrName, attrValue) { + attrValue = ko.utils.unwrapObservable(attrValue); + + // 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.) + var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined); + if (toRemove) + element.removeAttribute(attrName); + + // In IE <= 7 and IE8 Quirks Mode, you have to use the Javascript property name instead of the + // HTML attribute name for certain attributes. IE8 Standards Mode supports the correct behavior, + // but instead of figuring out the mode, we'll just set the attribute through the Javascript + // property for IE <= 8. + if (ko.utils.ieVersion <= 8 && attrName in attrHtmlToJavascriptMap) { + attrName = attrHtmlToJavascriptMap[attrName]; + if (toRemove) + element.removeAttribute(attrName); + else + element[attrName] = attrValue; + } else if (!toRemove) { + element.setAttribute(attrName, attrValue.toString()); + } + + // Treat "name" specially - although you can think of it as an attribute, it also needs + // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333) + // Deliberately being case-sensitive here because XHTML would regard "Name" as a different thing + // entirely, and there's no strong reason to allow for such casing in HTML. + if (attrName === "name") { + ko.utils.setElementName(element, toRemove ? "" : attrValue.toString()); + } + }); + } +}; +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(), unwrappedValue = ko.utils.unwrapObservable(modelValue); + if ((element.type == "checkbox") && (unwrappedValue 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 + ko.utils.addOrRemoveItem(modelValue, element.value, element.checked); + } else { + ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'checked', valueToWrite, true); + } + }; + 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 any other value (not an array), the checkbox being checked represents the value being trueish + element.checked = value; + } + } else if (element.type == "radio") { + element.checked = (element.value == value); + } + } +}; +var classesWrittenByBindingKey = '__ko__cssValue'; +ko.bindingHandlers['css'] = { + 'update': function (element, valueAccessor) { + var value = ko.utils.unwrapObservable(valueAccessor()); + if (typeof value == "object") { + ko.utils.objectForEach(value, function(className, shouldHaveClass) { + shouldHaveClass = ko.utils.unwrapObservable(shouldHaveClass); + ko.utils.toggleDomNodeCssClass(element, className, shouldHaveClass); + }); + } else { + value = String(value || ''); // Make sure we don't try to store or set a non-string value + ko.utils.toggleDomNodeCssClass(element, element[classesWrittenByBindingKey], false); + element[classesWrittenByBindingKey] = value; + ko.utils.toggleDomNodeCssClass(element, value, true); + } + } +}; +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()) }); + } +}; +// 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} +function makeEventHandlerShortcut(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() || {}; + ko.utils.objectForEach(eventsToHandle, function(eventName) { + if (typeof eventName == "string") { + ko.utils.registerEventHandler(element, eventName, function (event) { + var handlerReturnValue; + var handlerFunction = valueAccessor()[eventName]; + if (!handlerFunction) + return; + var allBindings = allBindingsAccessor(); + + try { + // Take all the event args, and prefix with the viewmodel + var argsForHandler = ko.utils.makeArray(arguments); + argsForHandler.unshift(viewModel); + handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler); + } 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(); + } + }); + } + }); + } +}; +// "foreach: someExpression" is equivalent to "template: { foreach: someExpression }" +// "foreach: { data: someExpression, afterAdd: myfn }" is equivalent to "template: { foreach: someExpression, afterAdd: myfn }" +ko.bindingHandlers['foreach'] = { + makeTemplateValueAccessor: function(valueAccessor) { + return function() { + var modelValue = valueAccessor(), + unwrappedValue = ko.utils.peekObservable(modelValue); // Unwrap without setting a dependency here + + // If unwrappedValue is the array, pass in the wrapped value on its own + // The value will be unwrapped and tracked within the template binding + // (See https://github.com/SteveSanderson/knockout/issues/523) + if ((!unwrappedValue) || typeof unwrappedValue.length == "number") + return { 'foreach': modelValue, 'templateEngine': ko.nativeTemplateEngine.instance }; + + // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates + ko.utils.unwrapObservable(modelValue); + return { + 'foreach': unwrappedValue['data'], + 'as': unwrappedValue['as'], + 'includeDestroyed': unwrappedValue['includeDestroyed'], + 'afterAdd': unwrappedValue['afterAdd'], + 'beforeRemove': unwrappedValue['beforeRemove'], + 'afterRender': unwrappedValue['afterRender'], + 'beforeMove': unwrappedValue['beforeMove'], + 'afterMove': unwrappedValue['afterMove'], + 'templateEngine': ko.nativeTemplateEngine.instance + }; + }; + }, + 'init': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) { + return ko.bindingHandlers['template']['init'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor)); + }, + 'update': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) { + return ko.bindingHandlers['template']['update'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor), allBindingsAccessor, viewModel, bindingContext); + } +}; +ko.expressionRewriting.bindingRewriteValidators['foreach'] = false; // Can't rewrite control flow bindings +ko.virtualElements.allowedBindings['foreach'] = true; +var hasfocusUpdatingProperty = '__ko_hasfocusUpdating'; +var hasfocusLastValue = '__ko_hasfocusLastValue'; +ko.bindingHandlers['hasfocus'] = { + 'init': function(element, valueAccessor, allBindingsAccessor) { + var handleElementFocusChange = function(isFocused) { + // Where possible, ignore which event was raised and determine focus state using activeElement, + // as this avoids phantom focus/blur events raised when changing tabs in modern browsers. + // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers, + // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus + // from calling 'blur()' on the element when it loses focus. + // Discussion at https://github.com/SteveSanderson/knockout/pull/352 + element[hasfocusUpdatingProperty] = true; + var ownerDoc = element.ownerDocument; + if ("activeElement" in ownerDoc) { + var active; + try { + active = ownerDoc.activeElement; + } catch(e) { + // IE9 throws if you access activeElement during page load (see issue #703) + active = ownerDoc.body; + } + isFocused = (active === element); + } + var modelValue = valueAccessor(); + ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'hasfocus', isFocused, true); + + //cache the latest value, so we can avoid unnecessarily calling focus/blur in the update function + element[hasfocusLastValue] = isFocused; + element[hasfocusUpdatingProperty] = false; + }; + var handleElementFocusIn = handleElementFocusChange.bind(null, true); + var handleElementFocusOut = handleElementFocusChange.bind(null, false); + + ko.utils.registerEventHandler(element, "focus", handleElementFocusIn); + ko.utils.registerEventHandler(element, "focusin", handleElementFocusIn); // For IE + ko.utils.registerEventHandler(element, "blur", handleElementFocusOut); + ko.utils.registerEventHandler(element, "focusout", handleElementFocusOut); // For IE + }, + 'update': function(element, valueAccessor) { + var value = !!ko.utils.unwrapObservable(valueAccessor()); //force boolean to compare with last value + if (!element[hasfocusUpdatingProperty] && element[hasfocusLastValue] !== value) { + value ? element.focus() : element.blur(); + ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, value ? "focusin" : "focusout"]); // For IE, which doesn't reliably fire "focus" or "blur" events synchronously + } + } +}; + +ko.bindingHandlers['hasFocus'] = ko.bindingHandlers['hasfocus']; // Make "hasFocus" an alias +ko.bindingHandlers['html'] = { + 'init': function() { + // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications) + return { 'controlsDescendantBindings': true }; + }, + 'update': function (element, valueAccessor) { + // setHtml will unwrap the value if needed + ko.utils.setHtml(element, valueAccessor()); + } +}; +var withIfDomDataKey = '__ko_withIfBindingData'; +// Makes a binding like with or if +function makeWithIfBinding(bindingKey, isWith, isNot, makeContextCallback) { + ko.bindingHandlers[bindingKey] = { + 'init': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) { + ko.utils.domData.set(element, withIfDomDataKey, {}); + return { 'controlsDescendantBindings': true }; + }, + 'update': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) { + var withIfData = ko.utils.domData.get(element, withIfDomDataKey), + dataValue = ko.utils.unwrapObservable(valueAccessor()), + shouldDisplay = !isNot !== !dataValue, // equivalent to isNot ? !dataValue : !!dataValue + isFirstRender = !withIfData.savedNodes, + needsRefresh = isFirstRender || isWith || (shouldDisplay !== withIfData.didDisplayOnLastUpdate); + + if (needsRefresh) { + if (isFirstRender) { + withIfData.savedNodes = ko.utils.cloneNodes(ko.virtualElements.childNodes(element), true /* shouldCleanNodes */); + } + + if (shouldDisplay) { + if (!isFirstRender) { + ko.virtualElements.setDomNodeChildren(element, ko.utils.cloneNodes(withIfData.savedNodes)); + } + ko.applyBindingsToDescendants(makeContextCallback ? makeContextCallback(bindingContext, dataValue) : bindingContext, element); + } else { + ko.virtualElements.emptyNode(element); + } + + withIfData.didDisplayOnLastUpdate = shouldDisplay; + } + } + }; + ko.expressionRewriting.bindingRewriteValidators[bindingKey] = false; // Can't rewrite control flow bindings + ko.virtualElements.allowedBindings[bindingKey] = true; +} + +// Construct the actual binding handlers +makeWithIfBinding('if'); +makeWithIfBinding('ifnot', false /* isWith */, true /* isNot */); +makeWithIfBinding('with', true /* isWith */, false /* isNot */, + function(bindingContext, dataValue) { + return bindingContext['createChildContext'](dataValue); + } +); +function ensureDropdownSelectionIsConsistentWithModelValue(element, modelValue, preferModelValue) { + if (preferModelValue) { + if (modelValue !== ko.selectExtensions.readValue(element)) + ko.selectExtensions.writeValue(element, modelValue); + } + + // No matter which direction we're syncing in, we want the end result to be equality between dropdown value and model value. + // If they aren't equal, either we prefer the dropdown value, or the model value couldn't be represented, so either way, + // change the model value to match the dropdown. + if (modelValue !== ko.selectExtensions.readValue(element)) + ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, "change"]); +}; + +ko.bindingHandlers['options'] = { + 'init': function(element) { + if (ko.utils.tagNameLower(element) !== "select") + throw new Error("options binding applies only to SELECT elements"); + + // Remove all existing <option>s. + while (element.length > 0) { + element.remove(0); + } + + // Ensures that the binding processor doesn't try to bind the options + return { 'controlsDescendantBindings': true }; + }, + 'update': function (element, valueAccessor, allBindingsAccessor) { + var selectWasPreviouslyEmpty = element.length == 0; + var previousScrollTop = (!selectWasPreviouslyEmpty && element.multiple) ? element.scrollTop : null; + + var unwrappedArray = ko.utils.unwrapObservable(valueAccessor()); + var allBindings = allBindingsAccessor(); + var includeDestroyed = allBindings['optionsIncludeDestroyed']; + var captionPlaceholder = {}; + var captionValue; + var previousSelectedValues; + if (element.multiple) { + previousSelectedValues = ko.utils.arrayMap(element.selectedOptions || ko.utils.arrayFilter(element.childNodes, function (node) { + return node.tagName && (ko.utils.tagNameLower(node) === "option") && node.selected; + }), function (node) { + return ko.selectExtensions.readValue(node); + }); + } else if (element.selectedIndex >= 0) { + previousSelectedValues = [ ko.selectExtensions.readValue(element.options[element.selectedIndex]) ]; + } + + if (unwrappedArray) { + 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 includeDestroyed || item === undefined || item === null || !ko.utils.unwrapObservable(item['_destroy']); + }); + + // If caption is included, add it to the array + if ('optionsCaption' in allBindings) { + captionValue = ko.utils.unwrapObservable(allBindings['optionsCaption']); + // If caption value is null or undefined, don't show a caption + if (captionValue !== null && captionValue !== undefined) { + filteredArray.unshift(captionPlaceholder); + } + } + } else { + // If a falsy value is provided (e.g. null), we'll simply empty the select element + unwrappedArray = []; + } + + function applyToObject(object, predicate, defaultValue) { + var predicateType = typeof predicate; + if (predicateType == "function") // Given a function; run it against the data value + return predicate(object); + else if (predicateType == "string") // Given a string; treat it as a property name on the data value + return object[predicate]; + else // Given no optionsText arg; use the data value itself + return defaultValue; + } + + // The following functions can run at two different times: + // The first is when the whole array is being updated directly from this binding handler. + // The second is when an observable value for a specific array entry is updated. + // oldOptions will be empty in the first case, but will be filled with the previously generated option in the second. + function optionForArrayItem(arrayEntry, index, oldOptions) { + if (oldOptions.length) { + previousSelectedValues = oldOptions[0].selected && [ ko.selectExtensions.readValue(oldOptions[0]) ]; + } + var option = document.createElement("option"); + if (arrayEntry === captionPlaceholder) { + ko.utils.setHtml(option, captionValue); + ko.selectExtensions.writeValue(option, undefined); + } else { + // Apply a value to the option element + var optionValue = applyToObject(arrayEntry, allBindings['optionsValue'], arrayEntry); + ko.selectExtensions.writeValue(option, ko.utils.unwrapObservable(optionValue)); + + // Apply some text to the option element + var optionText = applyToObject(arrayEntry, allBindings['optionsText'], optionValue); + ko.utils.setTextContent(option, optionText); + } + return [option]; + } + + function setSelectionCallback(arrayEntry, newOptions) { + // 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. + if (previousSelectedValues) { + var isSelected = ko.utils.arrayIndexOf(previousSelectedValues, ko.selectExtensions.readValue(newOptions[0])) >= 0; + ko.utils.setOptionNodeSelectionState(newOptions[0], isSelected); + } + } + + var callback = setSelectionCallback; + if (allBindings['optionsAfterRender']) { + callback = function(arrayEntry, newOptions) { + setSelectionCallback(arrayEntry, newOptions); + ko.dependencyDetection.ignore(allBindings['optionsAfterRender'], null, [newOptions[0], arrayEntry !== captionPlaceholder ? arrayEntry : undefined]); + } + } + + ko.utils.setDomNodeChildrenFromArrayMapping(element, filteredArray, optionForArrayItem, null, callback); + + // Clear previousSelectedValues so that future updates to individual objects don't get stale data + previousSelectedValues = null; + + if (selectWasPreviouslyEmpty && ('value' in allBindings)) { + // Ensure consistency between model value and selected option. + // If the dropdown is being populated for the first time here (or was otherwise previously empty), + // the dropdown selection state is meaningless, so we preserve the model value. + ensureDropdownSelectionIsConsistentWithModelValue(element, ko.utils.peekObservable(allBindings['value']), /* preferModelValue */ true); + } + + // Workaround for IE bug + ko.utils.ensureSelectElementIsRenderedCorrectly(element); + + if (previousScrollTop && Math.abs(previousScrollTop - element.scrollTop) > 20) + element.scrollTop = previousScrollTop; + } +}; +ko.bindingHandlers['options'].optionValueDomDataKey = '__ko.optionValueDomData__'; +ko.bindingHandlers['selectedOptions'] = { + 'init': function (element, valueAccessor, allBindingsAccessor) { + ko.utils.registerEventHandler(element, "change", function () { + var value = valueAccessor(), valueToWrite = []; + ko.utils.arrayForEach(element.getElementsByTagName("option"), function(node) { + if (node.selected) + valueToWrite.push(ko.selectExtensions.readValue(node)); + }); + ko.expressionRewriting.writeValueToProperty(value, allBindingsAccessor, 'selectedOptions', valueToWrite); + }); + }, + 'update': function (element, valueAccessor) { + if (ko.utils.tagNameLower(element) != "select") + throw new Error("values binding applies only to SELECT elements"); + + var newValue = ko.utils.unwrapObservable(valueAccessor()); + if (newValue && typeof newValue.length == "number") { + ko.utils.arrayForEach(element.getElementsByTagName("option"), function(node) { + var isSelected = ko.utils.arrayIndexOf(newValue, ko.selectExtensions.readValue(node)) >= 0; + ko.utils.setOptionNodeSelectionState(node, isSelected); + }); + } + } +}; +ko.bindingHandlers['style'] = { + 'update': function (element, valueAccessor) { + var value = ko.utils.unwrapObservable(valueAccessor() || {}); + ko.utils.objectForEach(value, function(styleName, styleValue) { + styleValue = ko.utils.unwrapObservable(styleValue); + element.style[styleName] = styleValue || ""; // Empty string removes the value, whereas null/undefined have no effect + }); + } +}; +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"); + 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['text'] = { + 'update': function (element, valueAccessor) { + ko.utils.setTextContent(element, valueAccessor()); + } +}; +ko.virtualElements.allowedBindings['text'] = true; +ko.bindingHandlers['uniqueName'] = { + 'init': function (element, valueAccessor) { + if (valueAccessor()) { + var name = "ko_unique_" + (++ko.bindingHandlers['uniqueName'].currentIndex); + ko.utils.setElementName(element, name); + } + } +}; +ko.bindingHandlers['uniqueName'].currentIndex = 0; +ko.bindingHandlers['value'] = { + 'init': function (element, valueAccessor, allBindingsAccessor) { + // Always catch "change" event; possibly other events too if asked + var eventsToCatch = ["change"]; + var requestedEventsToCatch = allBindingsAccessor()["valueUpdate"]; + var propertyChangedFired = false; + if (requestedEventsToCatch) { + if (typeof requestedEventsToCatch == "string") // Allow both individual event names, and arrays of event names + requestedEventsToCatch = [requestedEventsToCatch]; + ko.utils.arrayPushAll(eventsToCatch, requestedEventsToCatch); + eventsToCatch = ko.utils.arrayGetDistinctValues(eventsToCatch); + } + + var valueUpdateHandler = function() { + propertyChangedFired = false; + var modelValue = valueAccessor(); + var elementValue = ko.selectExtensions.readValue(element); + ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'value', elementValue); + } + + // Workaround for https://github.com/SteveSanderson/knockout/issues/122 + // IE doesn't fire "change" events on textboxes if the user selects a value from its autocomplete list + var ieAutoCompleteHackNeeded = ko.utils.ieVersion && element.tagName.toLowerCase() == "input" && element.type == "text" + && element.autocomplete != "off" && (!element.form || element.form.autocomplete != "off"); + if (ieAutoCompleteHackNeeded && ko.utils.arrayIndexOf(eventsToCatch, "propertychange") == -1) { + ko.utils.registerEventHandler(element, "propertychange", function () { propertyChangedFired = true }); + ko.utils.registerEventHandler(element, "blur", function() { + if (propertyChangedFired) { + valueUpdateHandler(); + } + }); + } + + ko.utils.arrayForEach(eventsToCatch, function(eventName) { + // The syntax "after<eventname>" 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 handler = valueUpdateHandler; + if (ko.utils.stringStartsWith(eventName, "after")) { + handler = function() { setTimeout(valueUpdateHandler, 0) }; + eventName = eventName.substring("after".length); + } + ko.utils.registerEventHandler(element, eventName, handler); + }); + }, + 'update': function (element, valueAccessor) { + var valueIsSelectOption = ko.utils.tagNameLower(element) === "select"; + var newValue = ko.utils.unwrapObservable(valueAccessor()); + var elementValue = ko.selectExtensions.readValue(element); + var valueHasChanged = (newValue !== elementValue); + + 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 = valueIsSelectOption; + if (alsoApplyAsynchronously) + setTimeout(applyValueAction, 0); + } + + // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change, + // because you're not allowed to have a model value that disagrees with a visible UI selection. + if (valueIsSelectOption && (element.length > 0)) + ensureDropdownSelectionIsConsistentWithModelValue(element, newValue, /* preferModelValue */ 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"; + } +}; +// 'click' is just a shorthand for the usual full-length event:{click:handler} +makeEventHandlerShortcut('click'); +// If you want to make a custom template engine, +// +// [1] Inherit from this class (like ko.nativeTemplateEngine does) +// [2] Override 'renderTemplateSource', supplying a function with this signature: +// +// function (templateSource, bindingContext, options) { +// // - templateSource.text() is the text of the template you should render +// // - bindingContext.$data is the data you should pass into the template +// // - you might also want to make bindingContext.$parent, bindingContext.$parents, +// // and bindingContext.$root available in the template too +// // - options gives you access to any other properties set on "data-bind: { template: options }" +// // +// // Return value: an array of DOM nodes +// } +// +// [3] Override 'createJavaScriptEvaluatorBlock', supplying a function with this signature: +// +// function (script) { +// // Return value: Whatever syntax means "Evaluate the JavaScript statement 'script' and output the result" +// // For example, the jquery.tmpl template engine converts 'someScript' to '${ someScript }' +// } +// +// This is only necessary if you want to allow data-bind attributes to reference arbitrary template variables. +// If you don't want to allow that, you can set the property 'allowTemplateRewriting' to false (like ko.nativeTemplateEngine does) +// and then you don't need to override 'createJavaScriptEvaluatorBlock'. + +ko.templateEngine = function () { }; + +ko.templateEngine.prototype['renderTemplateSource'] = function (templateSource, bindingContext, options) { + throw new Error("Override renderTemplateSource"); +}; + +ko.templateEngine.prototype['createJavaScriptEvaluatorBlock'] = function (script) { + throw new Error("Override createJavaScriptEvaluatorBlock"); +}; + +ko.templateEngine.prototype['makeTemplateSource'] = function(template, templateDocument) { + // Named template + if (typeof template == "string") { + templateDocument = templateDocument || document; + var elem = templateDocument.getElementById(template); + if (!elem) + throw new Error("Cannot find template with ID " + template); + return new ko.templateSources.domElement(elem); + } else if ((template.nodeType == 1) || (template.nodeType == 8)) { + // Anonymous template + return new ko.templateSources.anonymousTemplate(template); + } else + throw new Error("Unknown template type: " + template); +}; + +ko.templateEngine.prototype['renderTemplate'] = function (template, bindingContext, options, templateDocument) { + var templateSource = this['makeTemplateSource'](template, templateDocument); + return this['renderTemplateSource'](templateSource, bindingContext, options); +}; + +ko.templateEngine.prototype['isTemplateRewritten'] = function (template, templateDocument) { + // Skip rewriting if requested + if (this['allowTemplateRewriting'] === false) + return true; + return this['makeTemplateSource'](template, templateDocument)['data']("isRewritten"); +}; + +ko.templateEngine.prototype['rewriteTemplate'] = function (template, rewriterCallback, templateDocument) { + var templateSource = this['makeTemplateSource'](template, templateDocument); + var rewritten = rewriterCallback(templateSource['text']()); + templateSource['text'](rewritten); + templateSource['data']("isRewritten", true); +}; + +ko.exportSymbol('templateEngine', ko.templateEngine); + +ko.templateRewriting = (function () { + var memoizeDataBindingAttributeSyntaxRegex = /(<([a-z]+\d*)(?:\s+(?!data-bind\s*=\s*)[a-z0-9\-]+(?:=(?:\"[^\"]*\"|\'[^\']*\'))?)*\s+)data-bind\s*=\s*(["'])([\s\S]*?)\3/gi; + var memoizeVirtualContainerBindingSyntaxRegex = /<!--\s*ko\b\s*([\s\S]*?)\s*-->/g; + + function validateDataBindValuesForRewriting(keyValueArray) { + var allValidators = ko.expressionRewriting.bindingRewriteValidators; + for (var i = 0; i < keyValueArray.length; i++) { + var key = keyValueArray[i]['key']; + if (allValidators.hasOwnProperty(key)) { + var validator = allValidators[key]; + + if (typeof validator === "function") { + var possibleErrorMessage = validator(keyValueArray[i]['value']); + if (possibleErrorMessage) + throw new Error(possibleErrorMessage); + } else if (!validator) { + throw new Error("This template engine does not support the '" + key + "' binding within its templates"); + } + } + } + } + + function constructMemoizedTagReplacement(dataBindAttributeValue, tagToRetain, nodeName, templateEngine) { + var dataBindKeyValueArray = ko.expressionRewriting.parseObjectLiteral(dataBindAttributeValue); + validateDataBindValuesForRewriting(dataBindKeyValueArray); + var rewrittenDataBindAttributeValue = ko.expressionRewriting.preProcessBindings(dataBindKeyValueArray); + + // For no obvious reason, Opera fails to evaluate rewrittenDataBindAttributeValue 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.__tr_ambtns(function($context,$element){return(function(){return{ " + rewrittenDataBindAttributeValue + " } })()},'" + nodeName.toLowerCase() + "')"; + return templateEngine['createJavaScriptEvaluatorBlock'](applyBindingsToNextSiblingScript) + tagToRetain; + } + + return { + ensureTemplateIsRewritten: function (template, templateEngine, templateDocument) { + if (!templateEngine['isTemplateRewritten'](template, templateDocument)) + templateEngine['rewriteTemplate'](template, function (htmlString) { + return ko.templateRewriting.memoizeBindingAttributeSyntax(htmlString, templateEngine); + }, templateDocument); + }, + + memoizeBindingAttributeSyntax: function (htmlString, templateEngine) { + return htmlString.replace(memoizeDataBindingAttributeSyntaxRegex, function () { + return constructMemoizedTagReplacement(/* dataBindAttributeValue: */ arguments[4], /* tagToRetain: */ arguments[1], /* nodeName: */ arguments[2], templateEngine); + }).replace(memoizeVirtualContainerBindingSyntaxRegex, function() { + return constructMemoizedTagReplacement(/* dataBindAttributeValue: */ arguments[1], /* tagToRetain: */ "<!-- ko -->", /* nodeName: */ "#comment", templateEngine); + }); + }, + + applyMemoizedBindingsToNextSibling: function (bindings, nodeName) { + return ko.memoization.memoize(function (domNode, bindingContext) { + var nodeToBind = domNode.nextSibling; + if (nodeToBind && nodeToBind.nodeName.toLowerCase() === nodeName) { + ko.applyBindingsToNode(nodeToBind, bindings, bindingContext); + } + }); + } + } +})(); + + +// Exported only because it has to be referenced by string lookup from within rewritten template +ko.exportSymbol('__tr_ambtns', ko.templateRewriting.applyMemoizedBindingsToNextSibling); +(function() { + // A template source represents a read/write way of accessing a template. This is to eliminate the need for template loading/saving + // logic to be duplicated in every template engine (and means they can all work with anonymous templates, etc.) + // + // Two are provided by default: + // 1. ko.templateSources.domElement - reads/writes the text content of an arbitrary DOM element + // 2. ko.templateSources.anonymousElement - uses ko.utils.domData to read/write text *associated* with the DOM element, but + // without reading/writing the actual element text content, since it will be overwritten + // with the rendered template output. + // You can implement your own template source if you want to fetch/store templates somewhere other than in DOM elements. + // Template sources need to have the following functions: + // text() - returns the template text from your storage location + // text(value) - writes the supplied template text to your storage location + // data(key) - reads values stored using data(key, value) - see below + // data(key, value) - associates "value" with this template and the key "key". Is used to store information like "isRewritten". + // + // Optionally, template sources can also have the following functions: + // nodes() - returns a DOM element containing the nodes of this template, where available + // nodes(value) - writes the given DOM element to your storage location + // If a DOM element is available for a given template source, template engines are encouraged to use it in preference over text() + // for improved speed. However, all templateSources must supply text() even if they don't supply nodes(). + // + // Once you've implemented a templateSource, make your template engine use it by subclassing whatever template engine you were + // using and overriding "makeTemplateSource" to return an instance of your custom template source. + + ko.templateSources = {}; + + // ---- ko.templateSources.domElement ----- + + ko.templateSources.domElement = function(element) { + this.domElement = element; + } + + ko.templateSources.domElement.prototype['text'] = function(/* valueToWrite */) { + var tagNameLower = ko.utils.tagNameLower(this.domElement), + elemContentsProperty = tagNameLower === "script" ? "text" + : tagNameLower === "textarea" ? "value" + : "innerHTML"; + + if (arguments.length == 0) { + return this.domElement[elemContentsProperty]; + } else { + var valueToWrite = arguments[0]; + if (elemContentsProperty === "innerHTML") + ko.utils.setHtml(this.domElement, valueToWrite); + else + this.domElement[elemContentsProperty] = valueToWrite; + } + }; + + ko.templateSources.domElement.prototype['data'] = function(key /*, valueToWrite */) { + if (arguments.length === 1) { + return ko.utils.domData.get(this.domElement, "templateSourceData_" + key); + } else { + ko.utils.domData.set(this.domElement, "templateSourceData_" + key, arguments[1]); + } + }; + + // ---- ko.templateSources.anonymousTemplate ----- + // Anonymous templates are normally saved/retrieved as DOM nodes through "nodes". + // For compatibility, you can also read "text"; it will be serialized from the nodes on demand. + // Writing to "text" is still supported, but then the template data will not be available as DOM nodes. + + var anonymousTemplatesDomDataKey = "__ko_anon_template__"; + ko.templateSources.anonymousTemplate = function(element) { + this.domElement = element; + } + ko.templateSources.anonymousTemplate.prototype = new ko.templateSources.domElement(); + ko.templateSources.anonymousTemplate.prototype.constructor = ko.templateSources.anonymousTemplate; + ko.templateSources.anonymousTemplate.prototype['text'] = function(/* valueToWrite */) { + if (arguments.length == 0) { + var templateData = ko.utils.domData.get(this.domElement, anonymousTemplatesDomDataKey) || {}; + if (templateData.textData === undefined && templateData.containerData) + templateData.textData = templateData.containerData.innerHTML; + return templateData.textData; + } else { + var valueToWrite = arguments[0]; + ko.utils.domData.set(this.domElement, anonymousTemplatesDomDataKey, {textData: valueToWrite}); + } + }; + ko.templateSources.domElement.prototype['nodes'] = function(/* valueToWrite */) { + if (arguments.length == 0) { + var templateData = ko.utils.domData.get(this.domElement, anonymousTemplatesDomDataKey) || {}; + return templateData.containerData; + } else { + var valueToWrite = arguments[0]; + ko.utils.domData.set(this.domElement, anonymousTemplatesDomDataKey, {containerData: valueToWrite}); + } + }; + + ko.exportSymbol('templateSources', ko.templateSources); + ko.exportSymbol('templateSources.domElement', ko.templateSources.domElement); + ko.exportSymbol('templateSources.anonymousTemplate', ko.templateSources.anonymousTemplate); +})(); +(function () { + var _templateEngine; + ko.setTemplateEngine = function (templateEngine) { + if ((templateEngine != undefined) && !(templateEngine instanceof ko.templateEngine)) + throw new Error("templateEngine must inherit from ko.templateEngine"); + _templateEngine = templateEngine; + } + + function invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, action) { + var node, nextInQueue = firstNode, firstOutOfRangeNode = ko.virtualElements.nextSibling(lastNode); + while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) { + nextInQueue = ko.virtualElements.nextSibling(node); + if (node.nodeType === 1 || node.nodeType === 8) + action(node); + } + } + + function activateBindingsOnContinuousNodeArray(continuousNodeArray, bindingContext) { + // To be used on any nodes that have been rendered by a template and have been inserted into some parent element + // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because + // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense, + // (1) Does a regular "applyBindings" to associate bindingContext with this node and to activate any non-memoized bindings + // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting) + + if (continuousNodeArray.length) { + var firstNode = continuousNodeArray[0], lastNode = continuousNodeArray[continuousNodeArray.length - 1]; + + // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind) + // whereas a regular applyBindings won't introduce new memoized nodes + invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, function(node) { + ko.applyBindings(bindingContext, node); + }); + invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, function(node) { + ko.memoization.unmemoizeDomNodeAndDescendants(node, [bindingContext]); + }); + } + } + + function getFirstNodeFromPossibleArray(nodeOrNodeArray) { + return nodeOrNodeArray.nodeType ? nodeOrNodeArray + : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0] + : null; + } + + function executeTemplate(targetNodeOrNodeArray, renderMode, template, bindingContext, options) { + options = options || {}; + var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray); + var templateDocument = firstTargetNode && firstTargetNode.ownerDocument; + var templateEngineToUse = (options['templateEngine'] || _templateEngine); + ko.templateRewriting.ensureTemplateIsRewritten(template, templateEngineToUse, templateDocument); + var renderedNodesArray = templateEngineToUse['renderTemplate'](template, bindingContext, options, templateDocument); + + // Loosely check result is an array of DOM nodes + if ((typeof renderedNodesArray.length != "number") || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType != "number")) + throw new Error("Template engine must return an array of DOM nodes"); + + var haveAddedNodesToParent = false; + switch (renderMode) { + case "replaceChildren": + ko.virtualElements.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray); + haveAddedNodesToParent = true; + break; + case "replaceNode": + ko.utils.replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray); + haveAddedNodesToParent = true; + break; + case "ignoreTargetNode": break; + default: + throw new Error("Unknown renderMode: " + renderMode); + } + + if (haveAddedNodesToParent) { + activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext); + if (options['afterRender']) + ko.dependencyDetection.ignore(options['afterRender'], null, [renderedNodesArray, bindingContext['$data']]); + } + + return renderedNodesArray; + } + + ko.renderTemplate = function (template, dataOrBindingContext, options, targetNodeOrNodeArray, renderMode) { + options = options || {}; + if ((options['templateEngine'] || _templateEngine) == undefined) + throw new Error("Set a template engine before calling renderTemplate"); + renderMode = renderMode || "replaceChildren"; + + if (targetNodeOrNodeArray) { + var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray); + + var whenToDispose = function () { return (!firstTargetNode) || !ko.utils.domNodeIsAttachedToDocument(firstTargetNode); }; // Passive disposal (on next evaluation) + var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode == "replaceNode") ? firstTargetNode.parentNode : firstTargetNode; + + return ko.dependentObservable( // So the DOM is automatically updated when any dependency changes + function () { + // Ensure we've got a proper binding context to work with + var bindingContext = (dataOrBindingContext && (dataOrBindingContext instanceof ko.bindingContext)) + ? dataOrBindingContext + : new ko.bindingContext(ko.utils.unwrapObservable(dataOrBindingContext)); + + // Support selecting template as a function of the data being rendered + var templateName = typeof(template) == 'function' ? template(bindingContext['$data'], bindingContext) : template; + + var renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext, 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, dataOrBindingContext, options, domNode, "replaceNode"); + }); + } + }; + + ko.renderTemplateForEach = function (template, arrayOrObservableArray, options, targetNode, parentBindingContext) { + // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then + // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter. + var arrayItemContext; + + // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode + var executeTemplateForArrayItem = function (arrayValue, index) { + // Support selecting template as a function of the data being rendered + arrayItemContext = parentBindingContext['createChildContext'](ko.utils.unwrapObservable(arrayValue), options['as']); + arrayItemContext['$index'] = index; + var templateName = typeof(template) == 'function' ? template(arrayValue, arrayItemContext) : template; + return executeTemplate(null, "ignoreTargetNode", templateName, arrayItemContext, options); + } + + // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode + var activateBindingsCallback = function(arrayValue, addedNodesArray, index) { + activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext); + if (options['afterRender']) + options['afterRender'](addedNodesArray, arrayValue); + }; + + return 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 === undefined || item === null || !ko.utils.unwrapObservable(item['_destroy']); + }); + + // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function). + // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping. + ko.dependencyDetection.ignore(ko.utils.setDomNodeChildrenFromArrayMapping, null, [targetNode, filteredArray, executeTemplateForArrayItem, options, activateBindingsCallback]); + + }, null, { disposeWhenNodeIsRemoved: targetNode }); + }; + + var templateComputedDomDataKey = '__ko__templateComputedDomDataKey__'; + function disposeOldComputedAndStoreNewOne(element, newComputed) { + var oldComputed = ko.utils.domData.get(element, templateComputedDomDataKey); + if (oldComputed && (typeof(oldComputed.dispose) == 'function')) + oldComputed.dispose(); + ko.utils.domData.set(element, templateComputedDomDataKey, (newComputed && newComputed.isActive()) ? newComputed : undefined); + } + + ko.bindingHandlers['template'] = { + 'init': function(element, valueAccessor) { + // Support anonymous templates + var bindingValue = ko.utils.unwrapObservable(valueAccessor()); + if ((typeof bindingValue != "string") && (!bindingValue['name']) && (element.nodeType == 1 || element.nodeType == 8)) { + // It's an anonymous template - store the element contents, then clear the element + var templateNodes = element.nodeType == 1 ? element.childNodes : ko.virtualElements.childNodes(element), + container = ko.utils.moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent + new ko.templateSources.anonymousTemplate(element)['nodes'](container); + } + return { 'controlsDescendantBindings': true }; + }, + 'update': function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) { + var templateName = ko.utils.unwrapObservable(valueAccessor()), + options = {}, + shouldDisplay = true, + dataValue, + templateComputed = null; + + if (typeof templateName != "string") { + options = templateName; + templateName = ko.utils.unwrapObservable(options['name']); + + // Support "if"/"ifnot" conditions + if ('if' in options) + shouldDisplay = ko.utils.unwrapObservable(options['if']); + if (shouldDisplay && 'ifnot' in options) + shouldDisplay = !ko.utils.unwrapObservable(options['ifnot']); + + dataValue = ko.utils.unwrapObservable(options['data']); + } + + if ('foreach' in options) { + // Render once for each data point (treating data set as empty if shouldDisplay==false) + var dataArray = (shouldDisplay && options['foreach']) || []; + templateComputed = ko.renderTemplateForEach(templateName || element, dataArray, options, element, bindingContext); + } else if (!shouldDisplay) { + ko.virtualElements.emptyNode(element); + } else { + // Render once for this single data point (or use the viewModel if no data was provided) + var innerBindingContext = ('data' in options) ? + bindingContext['createChildContext'](dataValue, options['as']) : // Given an explitit 'data' value, we create a child binding context for it + bindingContext; // Given no explicit 'data' value, we retain the same binding context + templateComputed = ko.renderTemplate(templateName || element, innerBindingContext, options, element); + } + + // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?) + disposeOldComputedAndStoreNewOne(element, templateComputed); + } + }; + + // Anonymous templates can't be rewritten. Give a nice error message if you try to do it. + ko.expressionRewriting.bindingRewriteValidators['template'] = function(bindingValue) { + var parsedBindingValue = ko.expressionRewriting.parseObjectLiteral(bindingValue); + + if ((parsedBindingValue.length == 1) && parsedBindingValue[0]['unknown']) + return null; // It looks like a string literal, not an object literal, so treat it as a named template (which is allowed for rewriting) + + if (ko.expressionRewriting.keyValueArrayContainsKey(parsedBindingValue, "name")) + return null; // Named templates can be rewritten, so return "no error" + return "This template engine does not support anonymous templates nested within its templates"; + }; + + ko.virtualElements.allowedBindings['template'] = true; +})(); + +ko.exportSymbol('setTemplateEngine', ko.setTemplateEngine); +ko.exportSymbol('renderTemplate', ko.renderTemplate); + +ko.utils.compareArrays = (function () { + var statusNotInOld = 'added', statusNotInNew = 'deleted'; + + // Simple calculation based on Levenshtein distance. + function compareArrays(oldArray, newArray, dontLimitMoves) { + oldArray = oldArray || []; + newArray = newArray || []; + + if (oldArray.length <= newArray.length) + return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, dontLimitMoves); + else + return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, dontLimitMoves); + } + + function compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, dontLimitMoves) { + var myMin = Math.min, + myMax = Math.max, + editDistanceMatrix = [], + smlIndex, smlIndexMax = smlArray.length, + bigIndex, bigIndexMax = bigArray.length, + compareRange = (bigIndexMax - smlIndexMax) || 1, + maxDistance = smlIndexMax + bigIndexMax + 1, + thisRow, lastRow, + bigIndexMaxForRow, bigIndexMinForRow; + + for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) { + lastRow = thisRow; + editDistanceMatrix.push(thisRow = []); + bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange); + bigIndexMinForRow = myMax(0, smlIndex - 1); + for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) { + if (!bigIndex) + thisRow[bigIndex] = smlIndex + 1; + else if (!smlIndex) // Top row - transform empty array into new array via additions + thisRow[bigIndex] = bigIndex + 1; + else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1]) + thisRow[bigIndex] = lastRow[bigIndex - 1]; // copy value (no edit) + else { + var northDistance = lastRow[bigIndex] || maxDistance; // not in big (deletion) + var westDistance = thisRow[bigIndex - 1] || maxDistance; // not in small (addition) + thisRow[bigIndex] = myMin(northDistance, westDistance) + 1; + } + } + } + + var editScript = [], meMinusOne, notInSml = [], notInBig = []; + for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) { + meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1; + if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) { + notInSml.push(editScript[editScript.length] = { // added + 'status': statusNotInSml, + 'value': bigArray[--bigIndex], + 'index': bigIndex }); + } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) { + notInBig.push(editScript[editScript.length] = { // deleted + 'status': statusNotInBig, + 'value': smlArray[--smlIndex], + 'index': smlIndex }); + } else { + editScript.push({ + 'status': "retained", + 'value': bigArray[--bigIndex] }); + --smlIndex; + } + } + + if (notInSml.length && notInBig.length) { + // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of + // smlIndexMax keeps the time complexity of this algorithm linear. + var limitFailedCompares = smlIndexMax * 10, failedCompares, + a, d, notInSmlItem, notInBigItem; + // Go through the items that have been added and deleted and try to find matches between them. + for (failedCompares = a = 0; (dontLimitMoves || failedCompares < limitFailedCompares) && (notInSmlItem = notInSml[a]); a++) { + for (d = 0; notInBigItem = notInBig[d]; d++) { + if (notInSmlItem['value'] === notInBigItem['value']) { + notInSmlItem['moved'] = notInBigItem['index']; + notInBigItem['moved'] = notInSmlItem['index']; + notInBig.splice(d,1); // This item is marked as moved; so remove it from notInBig list + failedCompares = d = 0; // Reset failed compares count because we're checking for consecutive failures + break; + } + } + failedCompares += d; + } + } + return editScript.reverse(); + } + + return compareArrays; +})(); + +ko.exportSymbol('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 + + // "callbackAfterAddingNodes" will be invoked after any "mapping"-generated nodes are inserted into the container node + // You can use this, for example, to activate bindings on those nodes. + + function fixUpNodesToBeMovedOrRemoved(contiguousNodeArray) { + // Before moving, deleting, or replacing a set of nodes that were previously outputted by the "map" function, we have to reconcile + // them against what is in the DOM right now. It may be that some of the nodes have already been removed from the document, + // or that new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been + // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding. + // So, this function translates the old "map" output array into its best guess of what set of current DOM nodes should be removed. + // + // Rules: + // [A] Any leading nodes that aren't in the document any more should be ignored + // These most likely correspond to memoization nodes that were already removed during binding + // See https://github.com/SteveSanderson/knockout/pull/440 + // [B] We want to output a contiguous series of nodes that are still in the document. So, ignore any nodes that + // have already been removed, and include any nodes that have been inserted among the previous collection + + // Rule [A] + while (contiguousNodeArray.length && !ko.utils.domNodeIsAttachedToDocument(contiguousNodeArray[0])) + contiguousNodeArray.splice(0, 1); + + // Rule [B] + if (contiguousNodeArray.length > 1) { + // Build up the actual new contiguous node set + var current = contiguousNodeArray[0], last = contiguousNodeArray[contiguousNodeArray.length - 1], newContiguousSet = [current]; + while (current !== last) { + current = current.nextSibling; + if (!current) // Won't happen, except if the developer has manually removed some DOM elements (then we're in an undefined scenario) + return; + newContiguousSet.push(current); + } + + // ... then mutate the input array to match this. + // (The following line replaces the contents of contiguousNodeArray with newContiguousSet) + Array.prototype.splice.apply(contiguousNodeArray, [0, contiguousNodeArray.length].concat(newContiguousSet)); + } + return contiguousNodeArray; + } + + function mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) { + // 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, index, fixUpNodesToBeMovedOrRemoved(mappedNodes)) || []; + + // On subsequent evaluations, just replace the previously-inserted DOM nodes + if (mappedNodes.length > 0) { + ko.utils.replaceDomNodes(mappedNodes, newMappedNodes); + if (callbackAfterAddingNodes) + ko.dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]); + } + + // 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 !ko.utils.anyDomNodeIsAttachedToDocument(mappedNodes); } }); + return { mappedNodes : mappedNodes, dependentObservable : (dependentObservable.isActive() ? dependentObservable : undefined) }; + } + + var lastMappingResultDomDataKey = "setDomNodeChildrenFromArrayMapping_lastMappingResult"; + + ko.utils.setDomNodeChildrenFromArrayMapping = function (domNode, array, mapping, options, callbackAfterAddingNodes) { + // Compare the provided array against the previous one + array = array || []; + options = options || {}; + var isFirstExecution = ko.utils.domData.get(domNode, lastMappingResultDomDataKey) === undefined; + var lastMappingResult = ko.utils.domData.get(domNode, lastMappingResultDomDataKey) || []; + var lastArray = ko.utils.arrayMap(lastMappingResult, function (x) { return x.arrayEntry; }); + var editScript = ko.utils.compareArrays(lastArray, array, options['dontLimitMoves']); + + // Build the new mapping result + var newMappingResult = []; + var lastMappingResultIndex = 0; + var newMappingResultIndex = 0; + + var nodesToDelete = []; + var itemsToProcess = []; + var itemsForBeforeRemoveCallbacks = []; + var itemsForMoveCallbacks = []; + var itemsForAfterAddCallbacks = []; + var mapData; + + function itemMovedOrRetained(editScriptIndex, oldPosition) { + mapData = lastMappingResult[oldPosition]; + if (newMappingResultIndex !== oldPosition) + itemsForMoveCallbacks[editScriptIndex] = mapData; + // Since updating the index might change the nodes, do so before calling fixUpNodesToBeMovedOrRemoved + mapData.indexObservable(newMappingResultIndex++); + fixUpNodesToBeMovedOrRemoved(mapData.mappedNodes); + newMappingResult.push(mapData); + itemsToProcess.push(mapData); + } + + function callCallback(callback, items) { + if (callback) { + for (var i = 0, n = items.length; i < n; i++) { + if (items[i]) { + ko.utils.arrayForEach(items[i].mappedNodes, function(node) { + callback(node, i, items[i].arrayEntry); + }); + } + } + } + } + + for (var i = 0, editScriptItem, movedIndex; editScriptItem = editScript[i]; i++) { + movedIndex = editScriptItem['moved']; + switch (editScriptItem['status']) { + case "deleted": + if (movedIndex === undefined) { + mapData = lastMappingResult[lastMappingResultIndex]; + + // Stop tracking changes to the mapping for these nodes + if (mapData.dependentObservable) + mapData.dependentObservable.dispose(); + + // Queue these nodes for later removal + nodesToDelete.push.apply(nodesToDelete, fixUpNodesToBeMovedOrRemoved(mapData.mappedNodes)); + if (options['beforeRemove']) { + itemsForBeforeRemoveCallbacks[i] = mapData; + itemsToProcess.push(mapData); + } + } + lastMappingResultIndex++; + break; + + case "retained": + itemMovedOrRetained(i, lastMappingResultIndex++); + break; + + case "added": + if (movedIndex !== undefined) { + itemMovedOrRetained(i, movedIndex); + } else { + mapData = { arrayEntry: editScriptItem['value'], indexObservable: ko.observable(newMappingResultIndex++) }; + newMappingResult.push(mapData); + itemsToProcess.push(mapData); + if (!isFirstExecution) + itemsForAfterAddCallbacks[i] = mapData; + } + break; + } + } + + // Call beforeMove first before any changes have been made to the DOM + callCallback(options['beforeMove'], itemsForMoveCallbacks); + + // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback) + ko.utils.arrayForEach(nodesToDelete, options['beforeRemove'] ? ko.cleanNode : ko.removeNode); + + // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback) + for (var i = 0, nextNode = ko.virtualElements.firstChild(domNode), lastNode, node; mapData = itemsToProcess[i]; i++) { + // Get nodes for newly added items + if (!mapData.mappedNodes) + ko.utils.extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable)); + + // Put nodes in the right place if they aren't there already + for (var j = 0; node = mapData.mappedNodes[j]; nextNode = node.nextSibling, lastNode = node, j++) { + if (node !== nextNode) + ko.virtualElements.insertAfter(domNode, node, lastNode); + } + + // Run the callbacks for newly added nodes (for example, to apply bindings, etc.) + if (!mapData.initialized && callbackAfterAddingNodes) { + callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable); + mapData.initialized = true; + } + } + + // If there's a beforeRemove callback, call it after reordering. + // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using + // some sort of animation, which is why we first reorder the nodes that will be removed. If the + // callback instead removes the nodes right away, it would be more efficient to skip reordering them. + // Perhaps we'll make that change in the future if this scenario becomes more common. + callCallback(options['beforeRemove'], itemsForBeforeRemoveCallbacks); + + // Finally call afterMove and afterAdd callbacks + callCallback(options['afterMove'], itemsForMoveCallbacks); + callCallback(options['afterAdd'], itemsForAfterAddCallbacks); + + // Store a copy of the array items we just considered so we can difference it next time + ko.utils.domData.set(domNode, lastMappingResultDomDataKey, newMappingResult); + } +})(); + +ko.exportSymbol('utils.setDomNodeChildrenFromArrayMapping', ko.utils.setDomNodeChildrenFromArrayMapping); +ko.nativeTemplateEngine = function () { + this['allowTemplateRewriting'] = false; +} + +ko.nativeTemplateEngine.prototype = new ko.templateEngine(); +ko.nativeTemplateEngine.prototype.constructor = ko.nativeTemplateEngine; +ko.nativeTemplateEngine.prototype['renderTemplateSource'] = function (templateSource, bindingContext, options) { + var useNodesIfAvailable = !(ko.utils.ieVersion < 9), // IE<9 cloneNode doesn't work properly + templateNodesFunc = useNodesIfAvailable ? templateSource['nodes'] : null, + templateNodes = templateNodesFunc ? templateSource['nodes']() : null; + + if (templateNodes) { + return ko.utils.makeArray(templateNodes.cloneNode(true).childNodes); + } else { + var templateText = templateSource['text'](); + return ko.utils.parseHtmlFragment(templateText); + } +}; + +ko.nativeTemplateEngine.instance = new ko.nativeTemplateEngine(); +ko.setTemplateEngine(ko.nativeTemplateEngine.instance); + +ko.exportSymbol('nativeTemplateEngine', ko.nativeTemplateEngine); +(function() { + 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. + // Note that as of Knockout 1.3, we only support jQuery.tmpl 1.0.0pre and later, + // which KO internally refers to as version "2", so older versions are no longer detected. + var jQueryTmplVersion = 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. + try { + if (jQuery['tmpl']['tag']['tmpl']['open'].toString().indexOf('__') >= 0) { + // Since 1.0.0pre, custom tags should append markup to an array called "__" + return 2; // Final version of jquery.tmpl + } + } catch(ex) { /* Apparently not the version we were looking for */ } + + return 1; // Any older version that we don't support + })(); + + function ensureHasReferencedJQueryTemplates() { + if (jQueryTmplVersion < 2) + throw new Error("Your version of jQuery.tmpl is too old. Please upgrade to jQuery.tmpl 1.0.0pre or later."); + } + + function executeTemplate(compiledTemplate, data, jQueryTemplateOptions) { + return jQuery['tmpl'](compiledTemplate, data, jQueryTemplateOptions); + } + + this['renderTemplateSource'] = function(templateSource, bindingContext, options) { + options = options || {}; + ensureHasReferencedJQueryTemplates(); + + // Ensure we have stored a precompiled version of this template (don't want to reparse on every render) + var precompiled = templateSource['data']('precompiled'); + if (!precompiled) { + var templateText = templateSource['text']() || ""; + // Wrap in "with($whatever.koBindingContext) { ... }" + templateText = "{{ko_with $item.koBindingContext}}" + templateText + "{{/ko_with}}"; + + precompiled = jQuery['template'](null, templateText); + templateSource['data']('precompiled', precompiled); + } + + var data = [bindingContext['$data']]; // Prewrap the data in an array to stop jquery.tmpl from trying to unwrap any arrays + var jQueryTemplateOptions = jQuery['extend']({ 'koBindingContext': bindingContext }, options['templateOptions']); + + var resultNodes = executeTemplate(precompiled, data, jQueryTemplateOptions); + 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['createJavaScriptEvaluatorBlock'] = function(script) { + return "{{ko_code ((function() { return " + script + " })()) }}"; + }; + + this['addTemplate'] = function(templateName, templateMarkup) { + document.write("<script type='text/html' id='" + templateName + "'>" + templateMarkup + "<" + "/script>"); + }; + + if (jQueryTmplVersion > 0) { + jQuery['tmpl']['tag']['ko_code'] = { + open: "__.push($1 || '');" + }; + jQuery['tmpl']['tag']['ko_with'] = { + open: "with($1) {", + close: "} " + }; + } + }; + + ko.jqueryTmplTemplateEngine.prototype = new ko.templateEngine(); + ko.jqueryTmplTemplateEngine.prototype.constructor = ko.jqueryTmplTemplateEngine; + + // Use this one by default *only if jquery.tmpl is referenced* + var jqueryTmplTemplateEngineInstance = new ko.jqueryTmplTemplateEngine(); + if (jqueryTmplTemplateEngineInstance.jQueryTmplVersion > 0) + ko.setTemplateEngine(jqueryTmplTemplateEngineInstance); + + ko.exportSymbol('jqueryTmplTemplateEngine', ko.jqueryTmplTemplateEngine); +})(); +})); +}()); +})(); |