vendor/assets/javascripts/knockout.js in knockoutjs-rails-2.3.0 vs vendor/assets/javascripts/knockout.js in knockoutjs-rails-3.0.0
- old
+ new
@@ -1,3676 +1,94 @@
-// Knockout JavaScript library v2.3.0
+// Knockout JavaScript library v3.0.0
// (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) {
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