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Posted to commits@archiva.apache.org by ol...@apache.org on 2012/03/26 13:09:19 UTC
svn commit: r1305310 [2/3] -
/archiva/trunk/archiva-modules/archiva-web/archiva-webapp-js/src/main/webapp/js/knockout-2.0.0.debug.js
Added: archiva/trunk/archiva-modules/archiva-web/archiva-webapp-js/src/main/webapp/js/knockout-2.0.0.debug.js
URL: http://svn.apache.org/viewvc/archiva/trunk/archiva-modules/archiva-web/archiva-webapp-js/src/main/webapp/js/knockout-2.0.0.debug.js?rev=1305310&view=auto
==============================================================================
--- archiva/trunk/archiva-modules/archiva-web/archiva-webapp-js/src/main/webapp/js/knockout-2.0.0.debug.js (added)
+++ archiva/trunk/archiva-modules/archiva-web/archiva-webapp-js/src/main/webapp/js/knockout-2.0.0.debug.js Mon Mar 26 11:09:19 2012
@@ -0,0 +1,3223 @@
+// Knockout JavaScript library v2.0.0
+// (c) Steven Sanderson - http://knockoutjs.com/
+// License: MIT (http://www.opensource.org/licenses/mit-license.php)
+
+(function(window,undefined){
+var ko = window["ko"] = {};
+// Google Closure Compiler helpers (used only to make the minified file smaller)
+ko.exportSymbol = function(publicPath, object) {
+ var tokens = publicPath.split(".");
+ var target = window;
+ for (var i = 0; i < tokens.length - 1; i++)
+ target = target[tokens[i]];
+ target[tokens[tokens.length - 1]] = object;
+};
+ko.exportProperty = function(owner, publicName, object) {
+ owner[publicName] = object;
+};
+ko.utils = new (function () {
+ var stringTrimRegex = /^(\s|\u00A0)+|(\s|\u00A0)+$/g;
+
+ // Represent the known event types in a compact way, then at runtime transform it into a hash with event name as key (for fast lookup)
+ var knownEvents = {}, knownEventTypesByEventName = {};
+ var keyEventTypeName = /Firefox\/2/i.test(navigator.userAgent) ? 'KeyboardEvent' : 'UIEvents';
+ knownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];
+ knownEvents['MouseEvents'] = ['click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover', 'mouseout', 'mouseenter', 'mouseleave'];
+ for (var eventType in knownEvents) {
+ var knownEventsForType = knownEvents[eventType];
+ if (knownEventsForType.length) {
+ for (var i = 0, j = knownEventsForType.length; i < j; i++)
+ knownEventTypesByEventName[knownEventsForType[i]] = eventType;
+ }
+ }
+
+ // Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)
+ var ieVersion = (function() {
+ var version = 3, div = document.createElement('div'), iElems = div.getElementsByTagName('i');
+
+ // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment
+ while (
+ div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',
+ iElems[0]
+ );
+ return version > 4 ? version : undefined;
+ }());
+ var isIe6 = ieVersion === 6,
+ isIe7 = ieVersion === 7;
+
+ function isClickOnCheckableElement(element, eventType) {
+ if ((element.tagName != "INPUT") || !element.type) return false;
+ if (eventType.toLowerCase() != "click") return false;
+ var inputType = element.type.toLowerCase();
+ return (inputType == "checkbox") || (inputType == "radio");
+ }
+
+ return {
+ fieldsIncludedWithJsonPost: ['authenticity_token', /^__RequestVerificationToken(_.*)?$/],
+
+ arrayForEach: function (array, action) {
+ for (var i = 0, j = array.length; i < j; i++)
+ action(array[i]);
+ },
+
+ arrayIndexOf: function (array, item) {
+ if (typeof Array.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) {
+ for (var i = 0, j = valuesToPush.length; i < j; i++)
+ array.push(valuesToPush[i]);
+ return array;
+ },
+
+ extend: function (target, source) {
+ for(var prop in source) {
+ if(source.hasOwnProperty(prop)) {
+ target[prop] = source[prop];
+ }
+ }
+ return target;
+ },
+
+ emptyDomNode: function (domNode) {
+ while (domNode.firstChild) {
+ ko.removeNode(domNode.firstChild);
+ }
+ },
+
+ setDomNodeChildren: function (domNode, childNodes) {
+ ko.utils.emptyDomNode(domNode);
+ if (childNodes) {
+ ko.utils.arrayForEach(childNodes, function (childNode) {
+ domNode.appendChild(childNode);
+ });
+ }
+ },
+
+ replaceDomNodes: function (nodeToReplaceOrNodeArray, newNodesArray) {
+ var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;
+ if (nodesToReplaceArray.length > 0) {
+ var insertionPoint = nodesToReplaceArray[0];
+ var parent = insertionPoint.parentNode;
+ for (var i = 0, j = newNodesArray.length; i < j; i++)
+ parent.insertBefore(newNodesArray[i], insertionPoint);
+ for (var i = 0, j = nodesToReplaceArray.length; i < j; i++) {
+ ko.removeNode(nodesToReplaceArray[i]);
+ }
+ }
+ },
+
+ setOptionNodeSelectionState: function (optionNode, isSelected) {
+ // IE6 sometimes throws "unknown error" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.
+ if (navigator.userAgent.indexOf("MSIE 6") >= 0)
+ optionNode.setAttribute("selected", isSelected);
+ else
+ optionNode.selected = isSelected;
+ },
+
+ stringTrim: function (string) {
+ return (string || "").replace(stringTrimRegex, "");
+ },
+
+ stringTokenize: function (string, delimiter) {
+ var result = [];
+ var tokens = (string || "").split(delimiter);
+ for (var i = 0, j = tokens.length; i < j; i++) {
+ var trimmed = ko.utils.stringTrim(tokens[i]);
+ if (trimmed !== "")
+ result.push(trimmed);
+ }
+ return result;
+ },
+
+ stringStartsWith: function (string, startsWith) {
+ string = string || "";
+ if (startsWith.length > string.length)
+ return false;
+ return string.substring(0, startsWith.length) === startsWith;
+ },
+
+ evalWithinScope: function (expression /*, scope1, scope2, scope3... */) {
+ // Build the source for a function that evaluates "expression"
+ // For each scope variable, add an extra level of "with" nesting
+ // Example result: with(sc[1]) { with(sc[0]) { return (expression) } }
+ var scopes = Array.prototype.slice.call(arguments, 1);
+ var functionBody = "return (" + expression + ")";
+ for (var i = 0; i < scopes.length; i++) {
+ if (scopes[i] && typeof scopes[i] == "object")
+ functionBody = "with(sc[" + i + "]) { " + functionBody + " } ";
+ }
+ return (new Function("sc", functionBody))(scopes);
+ },
+
+ domNodeIsContainedBy: function (node, containedByNode) {
+ if (containedByNode.compareDocumentPosition)
+ return (containedByNode.compareDocumentPosition(node) & 16) == 16;
+ while (node != null) {
+ if (node == containedByNode)
+ return true;
+ node = node.parentNode;
+ }
+ return false;
+ },
+
+ domNodeIsAttachedToDocument: function (node) {
+ return ko.utils.domNodeIsContainedBy(node, document);
+ },
+
+ registerEventHandler: function (element, eventType, handler) {
+ if (typeof jQuery != "undefined") {
+ if (isClickOnCheckableElement(element, eventType)) {
+ // For click events on checkboxes, jQuery interferes with the event handling in an awkward way:
+ // it toggles the element checked state *after* the click event handlers run, whereas native
+ // click events toggle the checked state *before* the event handler.
+ // Fix this by intecepting the handler and applying the correct checkedness before it runs.
+ var originalHandler = handler;
+ handler = function(event, eventData) {
+ var jQuerySuppliedCheckedState = this.checked;
+ if (eventData)
+ this.checked = eventData.checkedStateBeforeEvent !== true;
+ originalHandler.call(this, event);
+ this.checked = jQuerySuppliedCheckedState; // Restore the state jQuery applied
+ };
+ }
+ jQuery(element)['bind'](eventType, handler);
+ } else if (typeof element.addEventListener == "function")
+ element.addEventListener(eventType, handler, false);
+ else if (typeof element.attachEvent != "undefined")
+ element.attachEvent("on" + eventType, function (event) {
+ handler.call(element, event);
+ });
+ else
+ throw new Error("Browser doesn't support addEventListener or attachEvent");
+ },
+
+ triggerEvent: function (element, eventType) {
+ if (!(element && element.nodeType))
+ throw new Error("element must be a DOM node when calling triggerEvent");
+
+ if (typeof jQuery != "undefined") {
+ var eventData = [];
+ if (isClickOnCheckableElement(element, eventType)) {
+ // Work around the jQuery "click events on checkboxes" issue described above by storing the original checked state before triggering the handler
+ eventData.push({ checkedStateBeforeEvent: element.checked });
+ }
+ jQuery(element)['trigger'](eventType, eventData);
+ } else if (typeof document.createEvent == "function") {
+ if (typeof element.dispatchEvent == "function") {
+ var eventCategory = 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 (eventType == "click") {
+ if ((element.tagName == "INPUT") && ((element.type.toLowerCase() == "checkbox") || (element.type.toLowerCase() == "radio")))
+ element.checked = element.checked !== true;
+ }
+ element.fireEvent("on" + eventType);
+ }
+ else
+ throw new Error("Browser doesn't support triggering events");
+ },
+
+ unwrapObservable: function (value) {
+ return ko.isObservable(value) ? value() : value;
+ },
+
+ domNodeHasCssClass: function (node, className) {
+ var currentClassNames = (node.className || "").split(/\s+/);
+ return ko.utils.arrayIndexOf(currentClassNames, className) >= 0;
+ },
+
+ toggleDomNodeCssClass: function (node, className, shouldHaveClass) {
+ var hasClass = ko.utils.domNodeHasCssClass(node, className);
+ if (shouldHaveClass && !hasClass) {
+ node.className = (node.className || "") + " " + className;
+ } else if (hasClass && !shouldHaveClass) {
+ var currentClassNames = (node.className || "").split(/\s+/);
+ var newClassName = "";
+ for (var i = 0; i < currentClassNames.length; i++)
+ if (currentClassNames[i] != className)
+ newClassName += currentClassNames[i] + " ";
+ node.className = ko.utils.stringTrim(newClassName);
+ }
+ },
+
+ outerHTML: function(node) {
+ // For Chrome on non-text nodes
+ // (Although IE supports outerHTML, the way it formats HTML is inconsistent - sometimes closing </li> tags are omitted, sometimes not. That caused https://github.com/SteveSanderson/knockout/issues/212.)
+ if (ieVersion === undefined) {
+ var nativeOuterHtml = node.outerHTML;
+ if (typeof nativeOuterHtml == "string")
+ return nativeOuterHtml;
+ }
+
+ // Other browsers
+ var dummyContainer = window.document.createElement("div");
+ dummyContainer.appendChild(node.cloneNode(true));
+ return dummyContainer.innerHTML;
+ },
+
+ setTextContent: function(element, textContent) {
+ var value = ko.utils.unwrapObservable(textContent);
+ if ((value === null) || (value === undefined))
+ value = "";
+
+ 'innerText' in element ? element.innerText = value
+ : element.textContent = value;
+
+ if (ieVersion >= 9) {
+ // Believe it or not, this actually fixes an IE9 rendering bug. Insane. https://github.com/SteveSanderson/knockout/issues/209
+ element.innerHTML = element.innerHTML;
+ }
+ },
+
+ 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,
+
+ getFormFields: function(form, fieldName) {
+ var fields = ko.utils.makeArray(form.getElementsByTagName("INPUT")).concat(ko.utils.makeArray(form.getElementsByTagName("TEXTAREA")));
+ var isMatchingField = (typeof fieldName == 'string')
+ ? function(field) { return field.name === fieldName }
+ : function(field) { return fieldName.test(field.name) }; // Treat fieldName as regex or object containing predicate
+ var matches = [];
+ for (var i = fields.length - 1; i >= 0; i--) {
+ if (isMatchingField(fields[i]))
+ matches.push(fields[i]);
+ };
+ return matches;
+ },
+
+ parseJson: function (jsonString) {
+ if (typeof jsonString == "string") {
+ jsonString = ko.utils.stringTrim(jsonString);
+ if (jsonString) {
+ if (window.JSON && window.JSON.parse) // Use native parsing where available
+ return window.JSON.parse(jsonString);
+ return (new Function("return " + jsonString))(); // Fallback on less safe parsing for older browsers
+ }
+ }
+ return null;
+ },
+
+ stringifyJson: function (data) {
+ if ((typeof JSON == "undefined") || (typeof JSON.stringify == "undefined"))
+ throw new Error("Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js");
+ return JSON.stringify(ko.utils.unwrapObservable(data));
+ },
+
+ postJson: function (urlOrForm, data, options) {
+ options = options || {};
+ var params = options['params'] || {};
+ var includeFields = options['includeFields'] || this.fieldsIncludedWithJsonPost;
+ var url = urlOrForm;
+
+ // If we were given a form, use its 'action' URL and pick out any requested field values
+ if((typeof urlOrForm == 'object') && (urlOrForm.tagName == "FORM")) {
+ var originalForm = urlOrForm;
+ url = originalForm.action;
+ for (var i = includeFields.length - 1; i >= 0; i--) {
+ var fields = ko.utils.getFormFields(originalForm, includeFields[i]);
+ for (var j = fields.length - 1; j >= 0; j--)
+ params[fields[j].name] = fields[j].value;
+ }
+ }
+
+ data = ko.utils.unwrapObservable(data);
+ var form = document.createElement("FORM");
+ form.style.display = "none";
+ form.action = url;
+ form.method = "post";
+ for (var key in data) {
+ var input = document.createElement("INPUT");
+ input.name = key;
+ input.value = ko.utils.stringifyJson(ko.utils.unwrapObservable(data[key]));
+ form.appendChild(input);
+ }
+ for (var key in params) {
+ var input = document.createElement("INPUT");
+ input.name = key;
+ input.value = params[key];
+ form.appendChild(input);
+ }
+ document.body.appendChild(form);
+ options['submitter'] ? options['submitter'](form) : form.submit();
+ setTimeout(function () { form.parentNode.removeChild(form); }, 0);
+ }
+ }
+})();
+
+ko.exportSymbol('ko.utils', ko.utils);
+ko.utils.arrayForEach([
+ ['arrayForEach', ko.utils.arrayForEach],
+ ['arrayFirst', ko.utils.arrayFirst],
+ ['arrayFilter', ko.utils.arrayFilter],
+ ['arrayGetDistinctValues', ko.utils.arrayGetDistinctValues],
+ ['arrayIndexOf', ko.utils.arrayIndexOf],
+ ['arrayMap', ko.utils.arrayMap],
+ ['arrayPushAll', ko.utils.arrayPushAll],
+ ['arrayRemoveItem', ko.utils.arrayRemoveItem],
+ ['extend', ko.utils.extend],
+ ['fieldsIncludedWithJsonPost', ko.utils.fieldsIncludedWithJsonPost],
+ ['getFormFields', ko.utils.getFormFields],
+ ['postJson', ko.utils.postJson],
+ ['parseJson', ko.utils.parseJson],
+ ['registerEventHandler', ko.utils.registerEventHandler],
+ ['stringifyJson', ko.utils.stringifyJson],
+ ['range', ko.utils.range],
+ ['toggleDomNodeCssClass', ko.utils.toggleDomNodeCssClass],
+ ['triggerEvent', ko.utils.triggerEvent],
+ ['unwrapObservable', ko.utils.unwrapObservable]
+], function(item) {
+ ko.exportSymbol('ko.utils.' + item[0], item[1]);
+});
+
+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");
+ 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;
+ }
+ }
+ }
+})();
+
+ko.exportSymbol('ko.utils.domData', ko.utils.domData);
+ko.exportSymbol('ko.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();
+
+ function getDisposeCallbacksCollection(node, createIfNotFound) {
+ var allDisposeCallbacks = ko.utils.domData.get(node, domDataKey);
+ if ((allDisposeCallbacks === undefined) && createIfNotFound) {
+ allDisposeCallbacks = [];
+ ko.utils.domData.set(node, domDataKey, allDisposeCallbacks);
+ }
+ return allDisposeCallbacks;
+ }
+ function destroyCallbacksCollection(node) {
+ ko.utils.domData.set(node, domDataKey, undefined);
+ }
+
+ function cleanSingleNode(node) {
+ // Run all the dispose callbacks
+ var callbacks = getDisposeCallbacksCollection(node, false);
+ if (callbacks) {
+ callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)
+ for (var i = 0; i < callbacks.length; i++)
+ callbacks[i](node);
+ }
+
+ // Also erase the DOM data
+ ko.utils.domData.clear(node);
+
+ // Special support for jQuery here because it's so commonly used.
+ // Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData
+ // so notify it to tear down any resources associated with the node & descendants here.
+ if ((typeof jQuery == "function") && (typeof jQuery['cleanData'] == "function"))
+ jQuery['cleanData']([node]);
+ }
+
+ return {
+ addDisposeCallback : function(node, callback) {
+ if (typeof callback != "function")
+ throw new Error("Callback must be a function");
+ getDisposeCallbacksCollection(node, true).push(callback);
+ },
+
+ removeDisposeCallback : function(node, callback) {
+ var callbacksCollection = getDisposeCallbacksCollection(node, false);
+ if (callbacksCollection) {
+ ko.utils.arrayRemoveItem(callbacksCollection, callback);
+ if (callbacksCollection.length == 0)
+ destroyCallbacksCollection(node);
+ }
+ },
+
+ cleanNode : function(node) {
+ if ((node.nodeType != 1) && (node.nodeType != 9))
+ return;
+ cleanSingleNode(node);
+
+ // Clone the descendants list in case it changes during iteration
+ var descendants = [];
+ ko.utils.arrayPushAll(descendants, node.getElementsByTagName("*"));
+ for (var i = 0, j = descendants.length; i < j; i++)
+ cleanSingleNode(descendants[i]);
+ },
+
+ removeNode : function(node) {
+ ko.cleanNode(node);
+ if (node.parentNode)
+ node.parentNode.removeChild(node);
+ }
+ }
+})();
+ko.cleanNode = ko.utils.domNodeDisposal.cleanNode; // Shorthand name for convenience
+ko.removeNode = ko.utils.domNodeDisposal.removeNode; // Shorthand name for convenience
+ko.exportSymbol('ko.cleanNode', ko.cleanNode);
+ko.exportSymbol('ko.removeNode', ko.removeNode);
+ko.exportSymbol('ko.utils.domNodeDisposal', ko.utils.domNodeDisposal);
+ko.exportSymbol('ko.utils.domNodeDisposal.addDisposeCallback', ko.utils.domNodeDisposal.addDisposeCallback);
+ko.exportSymbol('ko.utils.domNodeDisposal.removeDisposeCallback', ko.utils.domNodeDisposal.removeDisposeCallback);(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) {
+ 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);
+
+ 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('ko.utils.parseHtmlFragment', ko.utils.parseHtmlFragment);
+ko.exportSymbol('ko.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('ko.memoization', ko.memoization);
+ko.exportSymbol('ko.memoization.memoize', ko.memoization.memoize);
+ko.exportSymbol('ko.memoization.unmemoize', ko.memoization.unmemoize);
+ko.exportSymbol('ko.memoization.parseMemoText', ko.memoization.parseMemoText);
+ko.exportSymbol('ko.memoization.unmemoizeDomNodeAndDescendants', ko.memoization.unmemoizeDomNodeAndDescendants);
+ko.extenders = {
+ '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) {
+ for (var key in requestedExtenders) {
+ var extenderHandler = ko.extenders[key];
+ if (typeof extenderHandler == 'function') {
+ target = extenderHandler(target, requestedExtenders[key]);
+ }
+ }
+ }
+ return target;
+}
+
+ko.exportSymbol('ko.extenders', ko.extenders);
+ko.subscription = function (callback, disposeCallback) {
+ this.callback = callback;
+ this.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(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.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);
+ });
+ }
+ },
+
+ getSubscriptionsCount: function () {
+ var total = 0;
+ for (var eventName in this._subscriptions) {
+ if (this._subscriptions.hasOwnProperty(eventName))
+ total += this._subscriptions[eventName].length;
+ }
+ return total;
+ },
+
+ extend: applyExtenders
+};
+
+
+ko.isSubscribable = function (instance) {
+ return typeof instance.subscribe == "function" && typeof instance["notifySubscribers"] == "function";
+};
+
+ko.exportSymbol('ko.subscribable', ko.subscribable);
+ko.exportSymbol('ko.isSubscribable', ko.isSubscribable);
+
+ko.dependencyDetection = (function () {
+ var _frames = [];
+
+ return {
+ begin: function (callback) {
+ _frames.push({ callback: callback, distinctDependencies:[] });
+ },
+
+ end: function () {
+ _frames.pop();
+ },
+
+ registerDependency: function (subscribable) {
+ if (!ko.isSubscribable(subscribable))
+ throw "Only subscribable things can act as dependencies";
+ if (_frames.length > 0) {
+ var topFrame = _frames[_frames.length - 1];
+ if (ko.utils.arrayIndexOf(topFrame.distinctDependencies, subscribable) >= 0)
+ return;
+ topFrame.distinctDependencies.push(subscribable);
+ topFrame.callback(subscribable);
+ }
+ }
+ };
+})();var primitiveTypes = { 'undefined':true, 'boolean':true, 'number':true, 'string':true };
+
+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];
+ 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;
+ }
+ }
+ ko.subscribable.call(observable);
+ observable.valueHasMutated = function () { observable["notifySubscribers"](_latestValue); }
+ observable.valueWillMutate = function () { observable["notifySubscribers"](_latestValue, "beforeChange"); }
+ ko.utils.extend(observable, ko.observable['fn']);
+
+ ko.exportProperty(observable, "valueHasMutated", observable.valueHasMutated);
+ ko.exportProperty(observable, "valueWillMutate", observable.valueWillMutate);
+
+ return observable;
+}
+
+ko.observable['fn'] = {
+ __ko_proto__: ko.observable,
+
+ "equalityComparer": function valuesArePrimitiveAndEqual(a, b) {
+ var oldValueIsPrimitive = (a === null) || (typeof(a) in primitiveTypes);
+ return oldValueIsPrimitive ? (a === b) : false;
+ }
+};
+
+ko.isObservable = function (instance) {
+ if ((instance === null) || (instance === undefined) || (instance.__ko_proto__ === undefined)) return false;
+ if (instance.__ko_proto__ === ko.observable) return true;
+ return ko.isObservable(instance.__ko_proto__); // Walk the prototype chain
+}
+ko.isWriteableObservable = function (instance) {
+ // Observable
+ if ((typeof instance == "function") && instance.__ko_proto__ === ko.observable)
+ return true;
+ // Writeable dependent observable
+ if ((typeof instance == "function") && (instance.__ko_proto__ === ko.dependentObservable) && (instance.hasWriteFunction))
+ return true;
+ // Anything else
+ return false;
+}
+
+
+ko.exportSymbol('ko.observable', ko.observable);
+ko.exportSymbol('ko.isObservable', ko.isObservable);
+ko.exportSymbol('ko.isWriteableObservable', ko.isWriteableObservable);
+ko.observableArray = function (initialValues) {
+ if (arguments.length == 0) {
+ // Zero-parameter constructor initializes to empty array
+ initialValues = [];
+ }
+ if ((initialValues !== null) && (initialValues !== undefined) && !('length' in initialValues))
+ throw new Error("The argument passed when initializing an observable array must be an array, or null, or undefined.");
+
+ var result = new ko.observable(initialValues);
+ ko.utils.extend(result, ko.observableArray['fn']);
+
+ ko.exportProperty(result, "remove", result.remove);
+ ko.exportProperty(result, "removeAll", result.removeAll);
+ ko.exportProperty(result, "destroy", result.destroy);
+ ko.exportProperty(result, "destroyAll", result.destroyAll);
+ ko.exportProperty(result, "indexOf", result.indexOf);
+ ko.exportProperty(result, "replace", result.replace);
+
+ return result;
+}
+
+ko.observableArray['fn'] = {
+ remove: function (valueOrPredicate) {
+ var underlyingArray = this();
+ 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();
+ 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();
+ 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()[index] = newItem;
+ this.valueHasMutated();
+ }
+ }
+}
+
+// Populate ko.observableArray.fn with read/write functions from native arrays
+ko.utils.arrayForEach(["pop", "push", "reverse", "shift", "sort", "splice", "unshift"], function (methodName) {
+ ko.observableArray['fn'][methodName] = function () {
+ var underlyingArray = this();
+ 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('ko.observableArray', ko.observableArray);
+function prepareOptions(evaluatorFunctionOrOptions, evaluatorFunctionTarget, options) {
+ if (evaluatorFunctionOrOptions && typeof evaluatorFunctionOrOptions == "object") {
+ // Single-parameter syntax - everything is on this "options" param
+ options = evaluatorFunctionOrOptions;
+ } else {
+ // Multi-parameter syntax - construct the options according to the params passed
+ options = options || {};
+ options["read"] = evaluatorFunctionOrOptions || options["read"];
+ }
+ // By here, "options" is always non-null
+
+ if (typeof options["read"] != "function")
+ throw "Pass a function that returns the value of the dependentObservable";
+
+ return options;
+}
+
+ko.dependentObservable = function (evaluatorFunctionOrOptions, evaluatorFunctionTarget, options) {
+ var _latestValue,
+ _hasBeenEvaluated = false,
+ options = prepareOptions(evaluatorFunctionOrOptions, evaluatorFunctionTarget, options);
+
+ // Build "disposeWhenNodeIsRemoved" and "disposeWhenNodeIsRemovedCallback" option values
+ // (Note: "disposeWhenNodeIsRemoved" option both proactively disposes as soon as the node is removed using ko.removeNode(),
+ // plus adds a "disposeWhen" callback that, on each evaluation, disposes if the node was removed by some other means.)
+ var disposeWhenNodeIsRemoved = (typeof options["disposeWhenNodeIsRemoved"] == "object") ? options["disposeWhenNodeIsRemoved"] : null;
+ var disposeWhenNodeIsRemovedCallback = null;
+ if (disposeWhenNodeIsRemoved) {
+ disposeWhenNodeIsRemovedCallback = function() { dependentObservable.dispose() };
+ ko.utils.domNodeDisposal.addDisposeCallback(disposeWhenNodeIsRemoved, disposeWhenNodeIsRemovedCallback);
+ var existingDisposeWhenFunction = options["disposeWhen"];
+ options["disposeWhen"] = function () {
+ return (!ko.utils.domNodeIsAttachedToDocument(disposeWhenNodeIsRemoved))
+ || ((typeof existingDisposeWhenFunction == "function") && existingDisposeWhenFunction());
+ }
+ }
+
+ var _subscriptionsToDependencies = [];
+ function disposeAllSubscriptionsToDependencies() {
+ ko.utils.arrayForEach(_subscriptionsToDependencies, function (subscription) {
+ subscription.dispose();
+ });
+ _subscriptionsToDependencies = [];
+ }
+
+ var evaluationTimeoutInstance = null;
+ function evaluatePossiblyAsync() {
+ var throttleEvaluationTimeout = dependentObservable['throttleEvaluation'];
+ if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {
+ clearTimeout(evaluationTimeoutInstance);
+ evaluationTimeoutInstance = setTimeout(evaluateImmediate, throttleEvaluationTimeout);
+ } else
+ evaluateImmediate();
+ }
+
+ function evaluateImmediate() {
+ // Don't dispose on first evaluation, because the "disposeWhen" callback might
+ // e.g., dispose when the associated DOM element isn't in the doc, and it's not
+ // going to be in the doc until *after* the first evaluation
+ if ((_hasBeenEvaluated) && typeof options["disposeWhen"] == "function") {
+ if (options["disposeWhen"]()) {
+ dependentObservable.dispose();
+ return;
+ }
+ }
+
+ try {
+ disposeAllSubscriptionsToDependencies();
+ ko.dependencyDetection.begin(function(subscribable) {
+ _subscriptionsToDependencies.push(subscribable.subscribe(evaluatePossiblyAsync));
+ });
+ var valueForThis = options["owner"] || evaluatorFunctionTarget; // If undefined, it will default to "window" by convention. This might change in the future.
+ var newValue = options["read"].call(valueForThis);
+ dependentObservable["notifySubscribers"](_latestValue, "beforeChange");
+ _latestValue = newValue;
+ } finally {
+ ko.dependencyDetection.end();
+ }
+
+ dependentObservable["notifySubscribers"](_latestValue);
+ _hasBeenEvaluated = true;
+ }
+
+ function dependentObservable() {
+ if (arguments.length > 0) {
+ if (typeof options["write"] === "function") {
+ // Writing a value
+ var valueForThis = options["owner"] || evaluatorFunctionTarget; // If undefined, it will default to "window" by convention. This might change in the future.
+ options["write"].apply(valueForThis, arguments);
+ } else {
+ throw "Cannot write a value to a dependentObservable unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.";
+ }
+ } else {
+ // Reading the value
+ if (!_hasBeenEvaluated)
+ evaluateImmediate();
+ ko.dependencyDetection.registerDependency(dependentObservable);
+ return _latestValue;
+ }
+ }
+ dependentObservable.getDependenciesCount = function () { return _subscriptionsToDependencies.length; }
+ dependentObservable.hasWriteFunction = typeof options["write"] === "function";
+ dependentObservable.dispose = function () {
+ if (disposeWhenNodeIsRemoved)
+ ko.utils.domNodeDisposal.removeDisposeCallback(disposeWhenNodeIsRemoved, disposeWhenNodeIsRemovedCallback);
+ disposeAllSubscriptionsToDependencies();
+ };
+
+ ko.subscribable.call(dependentObservable);
+ ko.utils.extend(dependentObservable, ko.dependentObservable['fn']);
+
+ if (options['deferEvaluation'] !== true)
+ evaluateImmediate();
+
+ ko.exportProperty(dependentObservable, 'dispose', dependentObservable.dispose);
+ ko.exportProperty(dependentObservable, 'getDependenciesCount', dependentObservable.getDependenciesCount);
+
+ return dependentObservable;
+};
+
+ko.dependentObservable['fn'] = {
+ __ko_proto__: ko.dependentObservable
+};
+
+ko.dependentObservable.__ko_proto__ = ko.observable;
+
+ko.exportSymbol('ko.dependentObservable', ko.dependentObservable);
+ko.exportSymbol('ko.computed', ko.dependentObservable); // Make "ko.computed" an alias for "ko.dependentObservable"
+(function() {
+ var maxNestedObservableDepth = 10; // Escape the (unlikely) pathalogical case where an observable's current value is itself (or similar reference cycle)
+
+ ko.toJS = function(rootObject) {
+ if (arguments.length == 0)
+ throw new Error("When calling ko.toJS, pass the object you want to convert.");
+
+ // We just unwrap everything at every level in the object graph
+ return mapJsObjectGraph(rootObject, function(valueToMap) {
+ // Loop because an observable's value might in turn be another observable wrapper
+ for (var i = 0; ko.isObservable(valueToMap) && (i < maxNestedObservableDepth); i++)
+ valueToMap = valueToMap();
+ return valueToMap;
+ });
+ };
+
+ ko.toJSON = function(rootObject) {
+ var plainJavaScriptObject = ko.toJS(rootObject);
+ return ko.utils.stringifyJson(plainJavaScriptObject);
+ };
+
+ function mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) {
+ visitedObjects = visitedObjects || new objectLookup();
+
+ rootObject = mapInputCallback(rootObject);
+ var canHaveProperties = (typeof rootObject == "object") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof Date));
+ if (!canHaveProperties)
+ return rootObject;
+
+ var outputProperties = rootObject instanceof Array ? [] : {};
+ visitedObjects.save(rootObject, outputProperties);
+
+ visitPropertiesOrArrayEntries(rootObject, function(indexer) {
+ var propertyValue = mapInputCallback(rootObject[indexer]);
+
+ switch (typeof propertyValue) {
+ case "boolean":
+ case "number":
+ case "string":
+ case "function":
+ outputProperties[indexer] = propertyValue;
+ break;
+ case "object":
+ case "undefined":
+ var previouslyMappedValue = visitedObjects.get(propertyValue);
+ outputProperties[indexer] = (previouslyMappedValue !== undefined)
+ ? previouslyMappedValue
+ : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects);
+ break;
+ }
+ });
+
+ return outputProperties;
+ }
+
+ function visitPropertiesOrArrayEntries(rootObject, visitorCallback) {
+ if (rootObject instanceof Array) {
+ for (var i = 0; i < rootObject.length; i++)
+ visitorCallback(i);
+ } else {
+ for (var propertyName in rootObject)
+ visitorCallback(propertyName);
+ }
+ };
+
+ function objectLookup() {
+ var keys = [];
+ var values = [];
+ this.save = function(key, value) {
+ var existingIndex = ko.utils.arrayIndexOf(keys, key);
+ if (existingIndex >= 0)
+ values[existingIndex] = value;
+ else {
+ keys.push(key);
+ values.push(value);
+ }
+ };
+ this.get = function(key) {
+ var existingIndex = ko.utils.arrayIndexOf(keys, key);
+ return (existingIndex >= 0) ? values[existingIndex] : undefined;
+ };
+ };
+})();
+
+ko.exportSymbol('ko.toJS', ko.toJS);
+ko.exportSymbol('ko.toJSON', ko.toJSON);(function () {
+ 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) {
+ if (element.tagName == 'OPTION') {
+ if (element[hasDomDataExpandoProperty] === true)
+ return ko.utils.domData.get(element, ko.bindingHandlers.options.optionValueDomDataKey);
+ return element.getAttribute("value");
+ } else if (element.tagName == 'SELECT')
+ return element.selectedIndex >= 0 ? ko.selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;
+ else
+ return element.value;
+ },
+
+ writeValue: function(element, value) {
+ if (element.tagName == 'OPTION') {
+ switch(typeof value) {
+ case "string":
+ 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;
+ }
+ } else if (element.tagName == 'SELECT') {
+ for (var i = element.options.length - 1; i >= 0; i--) {
+ if (ko.selectExtensions.readValue(element.options[i]) == value) {
+ element.selectedIndex = i;
+ break;
+ }
+ }
+ } else {
+ if ((value === null) || (value === undefined))
+ value = "";
+ element.value = value;
+ }
+ }
+ };
+})();
+
+ko.exportSymbol('ko.selectExtensions', ko.selectExtensions);
+ko.exportSymbol('ko.selectExtensions.readValue', ko.selectExtensions.readValue);
+ko.exportSymbol('ko.selectExtensions.writeValue', ko.selectExtensions.writeValue);
+
+ko.jsonExpressionRewriting = (function () {
+ var restoreCapturedTokensRegex = /\@ko_token_(\d+)\@/g;
+ var javaScriptAssignmentTarget = /^[\_$a-z][\_$a-z0-9]*(\[.*?\])*(\.[\_$a-z][\_$a-z0-9]*(\[.*?\])*)*$/i;
+ var javaScriptReservedWords = ["true", "false"];
+
+ function restoreTokens(string, tokens) {
+ 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 isWriteableValue(expression) {
+ if (ko.utils.arrayIndexOf(javaScriptReservedWords, ko.utils.stringTrim(expression).toLowerCase()) >= 0)
+ return false;
+ return expression.match(javaScriptAssignmentTarget) !== null;
+ }
+
+ 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;
+ },
+
+ insertPropertyAccessorsIntoJson: function (objectLiteralStringOrKeyValueArray) {
+ var keyValueArray = typeof objectLiteralStringOrKeyValueArray === "string"
+ ? ko.jsonExpressionRewriting.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 (isWriteableValue(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;
+ }
+ };
+})();
+
+ko.exportSymbol('ko.jsonExpressionRewriting', ko.jsonExpressionRewriting);
+ko.exportSymbol('ko.jsonExpressionRewriting.bindingRewriteValidators', ko.jsonExpressionRewriting.bindingRewriteValidators);
+ko.exportSymbol('ko.jsonExpressionRewriting.parseObjectLiteral', ko.jsonExpressionRewriting.parseObjectLiteral);
+ko.exportSymbol('ko.jsonExpressionRewriting.insertPropertyAccessorsIntoJson', ko.jsonExpressionRewriting.insertPropertyAccessorsIntoJson);
+(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.createComment("test").text === "<!--test-->";
+
+ var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*ko\s+(.*\:.*)\s*-->$/ : /^\s*ko\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 nodeArrayToText(nodeArray, cleanNodes) {
+ var texts = [];
+ for (var i = 0, j = nodeArray.length; i < j; i++) {
+ if (cleanNodes)
+ ko.utils.domNodeDisposal.cleanNode(nodeArray[i]);
+ texts.push(ko.utils.outerHTML(nodeArray[i]));
+ }
+ return String.prototype.concat.apply("", texts);
+ }
+
+ 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 (!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);
+ }
+ },
+
+ nextSibling: function(node) {
+ if (!isStartComment(node)) {
+ if (node.nextSibling && isEndComment(node.nextSibling))
+ return undefined;
+ return node.nextSibling;
+ } else {
+ return getMatchingEndComment(node).nextSibling;
+ }
+ },
+
+ virtualNodeBindingValue: function(node) {
+ var regexMatch = isStartComment(node);
+ return regexMatch ? regexMatch[1] : null;
+ },
+
+ extractAnonymousTemplateIfVirtualElement: function(node) {
+ if (ko.virtualElements.virtualNodeBindingValue(node)) {
+ // Empty out the virtual children, and associate "node" with an anonymous template matching its previous virtual children
+ var virtualChildren = ko.virtualElements.childNodes(node);
+ var anonymousTemplateText = nodeArrayToText(virtualChildren, true);
+ ko.virtualElements.emptyNode(node);
+ new ko.templateSources.anonymousTemplate(node).text(anonymousTemplateText);
+ }
+ },
+
+ 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[elementVerified.tagName.toLowerCase()])
+ 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);
+ }
+ }
+ };
+})();
+(function() {
+ var defaultBindingAttributeName = "data-bind";
+
+ ko.bindingProvider = function() { };
+
+ 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) : 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) {
+ try {
+ var viewModel = bindingContext['$data'];
+ var rewrittenBindings = " { " + ko.jsonExpressionRewriting.insertPropertyAccessorsIntoJson(bindingsString) + " } ";
+ return ko.utils.evalWithinScope(rewrittenBindings, viewModel === null ? window : viewModel, bindingContext);
+ } catch (ex) {
+ throw new Error("Unable to parse bindings.\nMessage: " + ex + ";\nBindings value: " + bindingsString);
+ }
+ }
+ });
+
+ ko.bindingProvider['instance'] = new ko.bindingProvider();
+})();
+
+ko.exportSymbol('ko.bindingProvider', ko.bindingProvider);(function () {
+ ko.bindingHandlers = {};
+
+ ko.bindingContext = function(dataItem, parentBindingContext) {
+ this['$data'] = dataItem;
+ if (parentBindingContext) {
+ this['$parent'] = parentBindingContext['$data'];
+ this['$parents'] = (parentBindingContext['$parents'] || []).slice(0);
+ this['$parents'].unshift(this['$parent']);
+ this['$root'] = parentBindingContext['$root'];
+ } else {
+ this['$parents'] = [];
+ this['$root'] = dataItem;
+ }
+ }
+ ko.bindingContext.prototype['createChildContext'] = function (dataItem) {
+ return new ko.bindingContext(dataItem, this);
+ };
+
+ 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, elementVerified) {
+ var currentChild, nextInQueue = elementVerified.childNodes[0];
+ 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, false);
+ }
+ }
+
+ function applyBindingsToNodeAndDescendantsInternal (viewModel, nodeVerified, isRootNodeForBindingContext) {
+ var shouldBindDescendants = true;
+
+ // Perf optimisation: Apply bindings only if...
+ // (1) It's a root element for this binding context, as we will need to store the binding context on this node
+ // 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 && isRootNodeForBindingContext) // Case (1)
+ || ko.bindingProvider['instance']['nodeHasBindings'](nodeVerified); // Case (2)
+ if (shouldApplyBindings)
+ shouldBindDescendants = applyBindingsToNodeInternal(nodeVerified, null, viewModel, isRootNodeForBindingContext).shouldBindDescendants;
+
+ if (isElement && shouldBindDescendants)
+ applyBindingsToDescendantsInternal(viewModel, nodeVerified);
+ }
+
+ function applyBindingsToNodeInternal (node, bindings, viewModelOrBindingContext, isRootNodeForBindingContext) {
+ // 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
+
+ // Pre-process any anonymous template bounded by comment nodes
+ ko.virtualElements.extractAnonymousTemplateIfVirtualElement(node);
+
+ // 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;
+ new 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'];
+
+ // We only need to store the bindingContext at the root of the subtree where it applies
+ // as all descendants will be able to find it by scanning up their ancestry
+ if (isRootNodeForBindingContext)
+ 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() : 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;
+ for (var bindingKey in parsedBindings) {
+ 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) {
+ for (var bindingKey in parsedBindings) {
+ var binding = ko.bindingHandlers[bindingKey];
+ if (binding && typeof binding["update"] == "function") {
+ var handlerUpdateFn = binding["update"];
+ handlerUpdateFn(node, makeValueAccessor(bindingKey), parsedBindingsAccessor, viewModel, bindingContextInstance);
+ }
+ }
+ }
+ }
+ },
+ null,
[... 1370 lines stripped ...]