jaroslav@1230: // Knockout JavaScript library v2.2.1
jaroslav@1230: // (c) Steven Sanderson - http://knockoutjs.com/
jaroslav@1230: // License: MIT (http://www.opensource.org/licenses/mit-license.php)
jaroslav@1230: 
jaroslav@1230: (function(){
jaroslav@1230: var DEBUG=true;
jaroslav@1230: (function(window,document,navigator,jQuery,undefined){
jaroslav@1230: !function(factory) {
jaroslav@1230:     // Support three module loading scenarios
jaroslav@1230:     if (typeof require === 'function' && typeof exports === 'object' && typeof module === 'object') {
jaroslav@1230:         // [1] CommonJS/Node.js
jaroslav@1230:         var target = module['exports'] || exports; // module.exports is for Node.js
jaroslav@1230:         factory(target);
jaroslav@1230:     } else if (typeof define === 'function' && define['amd']) {
jaroslav@1230:         // [2] AMD anonymous module
jaroslav@1230:         define(['exports'], factory);
jaroslav@1230:     } else {
jaroslav@1230:         // [3] No module loader (plain <script> tag) - put directly in global namespace
jaroslav@1230:         factory(window['ko'] = {});
jaroslav@1230:     }
jaroslav@1230: }(function(koExports){
jaroslav@1230: // Internally, all KO objects are attached to koExports (even the non-exported ones whose names will be minified by the closure compiler).
jaroslav@1230: // In the future, the following "ko" variable may be made distinct from "koExports" so that private objects are not externally reachable.
jaroslav@1230: var ko = typeof koExports !== 'undefined' ? koExports : {};
jaroslav@1230: // Google Closure Compiler helpers (used only to make the minified file smaller)
jaroslav@1230: ko.exportSymbol = function(koPath, object) {
jaroslav@1230: 	var tokens = koPath.split(".");
jaroslav@1230: 
jaroslav@1230: 	// In the future, "ko" may become distinct from "koExports" (so that non-exported objects are not reachable)
jaroslav@1230: 	// At that point, "target" would be set to: (typeof koExports !== "undefined" ? koExports : ko)
jaroslav@1230: 	var target = ko;
jaroslav@1230: 
jaroslav@1230: 	for (var i = 0; i < tokens.length - 1; i++)
jaroslav@1230: 		target = target[tokens[i]];
jaroslav@1230: 	target[tokens[tokens.length - 1]] = object;
jaroslav@1230: };
jaroslav@1230: ko.exportProperty = function(owner, publicName, object) {
jaroslav@1230:   owner[publicName] = object;
jaroslav@1230: };
jaroslav@1230: ko.version = "2.2.1";
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('version', ko.version);
jaroslav@1230: ko.utils = new (function () {
jaroslav@1230:     var stringTrimRegex = /^(\s|\u00A0)+|(\s|\u00A0)+$/g;
jaroslav@1230: 
jaroslav@1230:     // 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)
jaroslav@1230:     var knownEvents = {}, knownEventTypesByEventName = {};
jaroslav@1230:     var keyEventTypeName = /Firefox\/2/i.test(navigator.userAgent) ? 'KeyboardEvent' : 'UIEvents';
jaroslav@1230:     knownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];
jaroslav@1230:     knownEvents['MouseEvents'] = ['click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover', 'mouseout', 'mouseenter', 'mouseleave'];
jaroslav@1230:     for (var eventType in knownEvents) {
jaroslav@1230:         var knownEventsForType = knownEvents[eventType];
jaroslav@1230:         if (knownEventsForType.length) {
jaroslav@1230:             for (var i = 0, j = knownEventsForType.length; i < j; i++)
jaroslav@1230:                 knownEventTypesByEventName[knownEventsForType[i]] = eventType;
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230:     var eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true }; // Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406
jaroslav@1230: 
jaroslav@1230:     // Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)
jaroslav@1230:     // Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.
jaroslav@1230:     // Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.
jaroslav@1230:     // If there is a future need to detect specific versions of IE10+, we will amend this.
jaroslav@1230:     var ieVersion = (function() {
jaroslav@1230:         var version = 3, div = document.createElement('div'), iElems = div.getElementsByTagName('i');
jaroslav@1230: 
jaroslav@1230:         // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment
jaroslav@1230:         while (
jaroslav@1230:             div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',
jaroslav@1230:             iElems[0]
jaroslav@1230:         );
jaroslav@1230:         return version > 4 ? version : undefined;
jaroslav@1230:     }());
jaroslav@1230:     var isIe6 = ieVersion === 6,
jaroslav@1230:         isIe7 = ieVersion === 7;
jaroslav@1230: 
jaroslav@1230:     function isClickOnCheckableElement(element, eventType) {
jaroslav@1230:         if ((ko.utils.tagNameLower(element) !== "input") || !element.type) return false;
jaroslav@1230:         if (eventType.toLowerCase() != "click") return false;
jaroslav@1230:         var inputType = element.type;
jaroslav@1230:         return (inputType == "checkbox") || (inputType == "radio");
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     return {
jaroslav@1230:         fieldsIncludedWithJsonPost: ['authenticity_token', /^__RequestVerificationToken(_.*)?$/],
jaroslav@1230: 
jaroslav@1230:         arrayForEach: function (array, action) {
jaroslav@1230:             for (var i = 0, j = array.length; i < j; i++)
jaroslav@1230:                 action(array[i]);
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         arrayIndexOf: function (array, item) {
jaroslav@1230:             if (typeof Array.prototype.indexOf == "function")
jaroslav@1230:                 return Array.prototype.indexOf.call(array, item);
jaroslav@1230:             for (var i = 0, j = array.length; i < j; i++)
jaroslav@1230:                 if (array[i] === item)
jaroslav@1230:                     return i;
jaroslav@1230:             return -1;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         arrayFirst: function (array, predicate, predicateOwner) {
jaroslav@1230:             for (var i = 0, j = array.length; i < j; i++)
jaroslav@1230:                 if (predicate.call(predicateOwner, array[i]))
jaroslav@1230:                     return array[i];
jaroslav@1230:             return null;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         arrayRemoveItem: function (array, itemToRemove) {
jaroslav@1230:             var index = ko.utils.arrayIndexOf(array, itemToRemove);
jaroslav@1230:             if (index >= 0)
jaroslav@1230:                 array.splice(index, 1);
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         arrayGetDistinctValues: function (array) {
jaroslav@1230:             array = array || [];
jaroslav@1230:             var result = [];
jaroslav@1230:             for (var i = 0, j = array.length; i < j; i++) {
jaroslav@1230:                 if (ko.utils.arrayIndexOf(result, array[i]) < 0)
jaroslav@1230:                     result.push(array[i]);
jaroslav@1230:             }
jaroslav@1230:             return result;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         arrayMap: function (array, mapping) {
jaroslav@1230:             array = array || [];
jaroslav@1230:             var result = [];
jaroslav@1230:             for (var i = 0, j = array.length; i < j; i++)
jaroslav@1230:                 result.push(mapping(array[i]));
jaroslav@1230:             return result;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         arrayFilter: function (array, predicate) {
jaroslav@1230:             array = array || [];
jaroslav@1230:             var result = [];
jaroslav@1230:             for (var i = 0, j = array.length; i < j; i++)
jaroslav@1230:                 if (predicate(array[i]))
jaroslav@1230:                     result.push(array[i]);
jaroslav@1230:             return result;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         arrayPushAll: function (array, valuesToPush) {
jaroslav@1230:             if (valuesToPush instanceof Array)
jaroslav@1230:                 array.push.apply(array, valuesToPush);
jaroslav@1230:             else
jaroslav@1230:                 for (var i = 0, j = valuesToPush.length; i < j; i++)
jaroslav@1230:                     array.push(valuesToPush[i]);
jaroslav@1230:             return array;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         extend: function (target, source) {
jaroslav@1230:             if (source) {
jaroslav@1230:                 for(var prop in source) {
jaroslav@1230:                     if(source.hasOwnProperty(prop)) {
jaroslav@1230:                         target[prop] = source[prop];
jaroslav@1230:                     }
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230:             return target;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         emptyDomNode: function (domNode) {
jaroslav@1230:             while (domNode.firstChild) {
jaroslav@1230:                 ko.removeNode(domNode.firstChild);
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         moveCleanedNodesToContainerElement: function(nodes) {
jaroslav@1230:             // Ensure it's a real array, as we're about to reparent the nodes and
jaroslav@1230:             // we don't want the underlying collection to change while we're doing that.
jaroslav@1230:             var nodesArray = ko.utils.makeArray(nodes);
jaroslav@1230: 
jaroslav@1230:             var container = document.createElement('div');
jaroslav@1230:             for (var i = 0, j = nodesArray.length; i < j; i++) {
jaroslav@1230:                 container.appendChild(ko.cleanNode(nodesArray[i]));
jaroslav@1230:             }
jaroslav@1230:             return container;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         cloneNodes: function (nodesArray, shouldCleanNodes) {
jaroslav@1230:             for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {
jaroslav@1230:                 var clonedNode = nodesArray[i].cloneNode(true);
jaroslav@1230:                 newNodesArray.push(shouldCleanNodes ? ko.cleanNode(clonedNode) : clonedNode);
jaroslav@1230:             }
jaroslav@1230:             return newNodesArray;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         setDomNodeChildren: function (domNode, childNodes) {
jaroslav@1230:             ko.utils.emptyDomNode(domNode);
jaroslav@1230:             if (childNodes) {
jaroslav@1230:                 for (var i = 0, j = childNodes.length; i < j; i++)
jaroslav@1230:                     domNode.appendChild(childNodes[i]);
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         replaceDomNodes: function (nodeToReplaceOrNodeArray, newNodesArray) {
jaroslav@1230:             var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;
jaroslav@1230:             if (nodesToReplaceArray.length > 0) {
jaroslav@1230:                 var insertionPoint = nodesToReplaceArray[0];
jaroslav@1230:                 var parent = insertionPoint.parentNode;
jaroslav@1230:                 for (var i = 0, j = newNodesArray.length; i < j; i++)
jaroslav@1230:                     parent.insertBefore(newNodesArray[i], insertionPoint);
jaroslav@1230:                 for (var i = 0, j = nodesToReplaceArray.length; i < j; i++) {
jaroslav@1230:                     ko.removeNode(nodesToReplaceArray[i]);
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         setOptionNodeSelectionState: function (optionNode, isSelected) {
jaroslav@1230:             // IE6 sometimes throws "unknown error" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.
jaroslav@1230:             if (ieVersion < 7)
jaroslav@1230:                 optionNode.setAttribute("selected", isSelected);
jaroslav@1230:             else
jaroslav@1230:                 optionNode.selected = isSelected;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         stringTrim: function (string) {
jaroslav@1230:             return (string || "").replace(stringTrimRegex, "");
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         stringTokenize: function (string, delimiter) {
jaroslav@1230:             var result = [];
jaroslav@1230:             var tokens = (string || "").split(delimiter);
jaroslav@1230:             for (var i = 0, j = tokens.length; i < j; i++) {
jaroslav@1230:                 var trimmed = ko.utils.stringTrim(tokens[i]);
jaroslav@1230:                 if (trimmed !== "")
jaroslav@1230:                     result.push(trimmed);
jaroslav@1230:             }
jaroslav@1230:             return result;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         stringStartsWith: function (string, startsWith) {
jaroslav@1230:             string = string || "";
jaroslav@1230:             if (startsWith.length > string.length)
jaroslav@1230:                 return false;
jaroslav@1230:             return string.substring(0, startsWith.length) === startsWith;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         domNodeIsContainedBy: function (node, containedByNode) {
jaroslav@1230:             if (containedByNode.compareDocumentPosition)
jaroslav@1230:                 return (containedByNode.compareDocumentPosition(node) & 16) == 16;
jaroslav@1230:             while (node != null) {
jaroslav@1230:                 if (node == containedByNode)
jaroslav@1230:                     return true;
jaroslav@1230:                 node = node.parentNode;
jaroslav@1230:             }
jaroslav@1230:             return false;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         domNodeIsAttachedToDocument: function (node) {
jaroslav@1230:             return ko.utils.domNodeIsContainedBy(node, node.ownerDocument);
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         tagNameLower: function(element) {
jaroslav@1230:             // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.
jaroslav@1230:             // Possible future optimization: If we know it's an element from an XHTML document (not HTML),
jaroslav@1230:             // we don't need to do the .toLowerCase() as it will always be lower case anyway.
jaroslav@1230:             return element && element.tagName && element.tagName.toLowerCase();
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         registerEventHandler: function (element, eventType, handler) {
jaroslav@1230:             var mustUseAttachEvent = ieVersion && eventsThatMustBeRegisteredUsingAttachEvent[eventType];
jaroslav@1230:             if (!mustUseAttachEvent && typeof jQuery != "undefined") {
jaroslav@1230:                 if (isClickOnCheckableElement(element, eventType)) {
jaroslav@1230:                     // For click events on checkboxes, jQuery interferes with the event handling in an awkward way:
jaroslav@1230:                     // it toggles the element checked state *after* the click event handlers run, whereas native
jaroslav@1230:                     // click events toggle the checked state *before* the event handler.
jaroslav@1230:                     // Fix this by intecepting the handler and applying the correct checkedness before it runs.
jaroslav@1230:                     var originalHandler = handler;
jaroslav@1230:                     handler = function(event, eventData) {
jaroslav@1230:                         var jQuerySuppliedCheckedState = this.checked;
jaroslav@1230:                         if (eventData)
jaroslav@1230:                             this.checked = eventData.checkedStateBeforeEvent !== true;
jaroslav@1230:                         originalHandler.call(this, event);
jaroslav@1230:                         this.checked = jQuerySuppliedCheckedState; // Restore the state jQuery applied
jaroslav@1230:                     };
jaroslav@1230:                 }
jaroslav@1230:                 jQuery(element)['bind'](eventType, handler);
jaroslav@1230:             } else if (!mustUseAttachEvent && typeof element.addEventListener == "function")
jaroslav@1230:                 element.addEventListener(eventType, handler, false);
jaroslav@1230:             else if (typeof element.attachEvent != "undefined")
jaroslav@1230:                 element.attachEvent("on" + eventType, function (event) {
jaroslav@1230:                     handler.call(element, event);
jaroslav@1230:                 });
jaroslav@1230:             else
jaroslav@1230:                 throw new Error("Browser doesn't support addEventListener or attachEvent");
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         triggerEvent: function (element, eventType) {
jaroslav@1230:             if (!(element && element.nodeType))
jaroslav@1230:                 throw new Error("element must be a DOM node when calling triggerEvent");
jaroslav@1230: 
jaroslav@1230:             if (typeof jQuery != "undefined") {
jaroslav@1230:                 var eventData = [];
jaroslav@1230:                 if (isClickOnCheckableElement(element, eventType)) {
jaroslav@1230:                     // Work around the jQuery "click events on checkboxes" issue described above by storing the original checked state before triggering the handler
jaroslav@1230:                     eventData.push({ checkedStateBeforeEvent: element.checked });
jaroslav@1230:                 }
jaroslav@1230:                 jQuery(element)['trigger'](eventType, eventData);
jaroslav@1230:             } else if (typeof document.createEvent == "function") {
jaroslav@1230:                 if (typeof element.dispatchEvent == "function") {
jaroslav@1230:                     var eventCategory = knownEventTypesByEventName[eventType] || "HTMLEvents";
jaroslav@1230:                     var event = document.createEvent(eventCategory);
jaroslav@1230:                     event.initEvent(eventType, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, element);
jaroslav@1230:                     element.dispatchEvent(event);
jaroslav@1230:                 }
jaroslav@1230:                 else
jaroslav@1230:                     throw new Error("The supplied element doesn't support dispatchEvent");
jaroslav@1230:             } else if (typeof element.fireEvent != "undefined") {
jaroslav@1230:                 // Unlike other browsers, IE doesn't change the checked state of checkboxes/radiobuttons when you trigger their "click" event
jaroslav@1230:                 // so to make it consistent, we'll do it manually here
jaroslav@1230:                 if (isClickOnCheckableElement(element, eventType))
jaroslav@1230:                     element.checked = element.checked !== true;
jaroslav@1230:                 element.fireEvent("on" + eventType);
jaroslav@1230:             }
jaroslav@1230:             else
jaroslav@1230:                 throw new Error("Browser doesn't support triggering events");
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         unwrapObservable: function (value) {
jaroslav@1230:             return ko.isObservable(value) ? value() : value;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         peekObservable: function (value) {
jaroslav@1230:             return ko.isObservable(value) ? value.peek() : value;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         toggleDomNodeCssClass: function (node, classNames, shouldHaveClass) {
jaroslav@1230:             if (classNames) {
jaroslav@1230:                 var cssClassNameRegex = /[\w-]+/g,
jaroslav@1230:                     currentClassNames = node.className.match(cssClassNameRegex) || [];
jaroslav@1230:                 ko.utils.arrayForEach(classNames.match(cssClassNameRegex), function(className) {
jaroslav@1230:                     var indexOfClass = ko.utils.arrayIndexOf(currentClassNames, className);
jaroslav@1230:                     if (indexOfClass >= 0) {
jaroslav@1230:                         if (!shouldHaveClass)
jaroslav@1230:                             currentClassNames.splice(indexOfClass, 1);
jaroslav@1230:                     } else {
jaroslav@1230:                         if (shouldHaveClass)
jaroslav@1230:                             currentClassNames.push(className);
jaroslav@1230:                     }
jaroslav@1230:                 });
jaroslav@1230:                 node.className = currentClassNames.join(" ");
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         setTextContent: function(element, textContent) {
jaroslav@1230:             var value = ko.utils.unwrapObservable(textContent);
jaroslav@1230:             if ((value === null) || (value === undefined))
jaroslav@1230:                 value = "";
jaroslav@1230: 
jaroslav@1230:             if (element.nodeType === 3) {
jaroslav@1230:                 element.data = value;
jaroslav@1230:             } else {
jaroslav@1230:                 // We need there to be exactly one child: a text node.
jaroslav@1230:                 // If there are no children, more than one, or if it's not a text node,
jaroslav@1230:                 // we'll clear everything and create a single text node.
jaroslav@1230:                 var innerTextNode = ko.virtualElements.firstChild(element);
jaroslav@1230:                 if (!innerTextNode || innerTextNode.nodeType != 3 || ko.virtualElements.nextSibling(innerTextNode)) {
jaroslav@1230:                     ko.virtualElements.setDomNodeChildren(element, [document.createTextNode(value)]);
jaroslav@1230:                 } else {
jaroslav@1230:                     innerTextNode.data = value;
jaroslav@1230:                 }
jaroslav@1230: 
jaroslav@1230:                 ko.utils.forceRefresh(element);
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         setElementName: function(element, name) {
jaroslav@1230:             element.name = name;
jaroslav@1230: 
jaroslav@1230:             // Workaround IE 6/7 issue
jaroslav@1230:             // - https://github.com/SteveSanderson/knockout/issues/197
jaroslav@1230:             // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/
jaroslav@1230:             if (ieVersion <= 7) {
jaroslav@1230:                 try {
jaroslav@1230:                     element.mergeAttributes(document.createElement("<input name='" + element.name + "'/>"), false);
jaroslav@1230:                 }
jaroslav@1230:                 catch(e) {} // For IE9 with doc mode "IE9 Standards" and browser mode "IE9 Compatibility View"
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         forceRefresh: function(node) {
jaroslav@1230:             // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209
jaroslav@1230:             if (ieVersion >= 9) {
jaroslav@1230:                 // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container
jaroslav@1230:                 var elem = node.nodeType == 1 ? node : node.parentNode;
jaroslav@1230:                 if (elem.style)
jaroslav@1230:                     elem.style.zoom = elem.style.zoom;
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         ensureSelectElementIsRenderedCorrectly: function(selectElement) {
jaroslav@1230:             // 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.
jaroslav@1230:             // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option)
jaroslav@1230:             if (ieVersion >= 9) {
jaroslav@1230:                 var originalWidth = selectElement.style.width;
jaroslav@1230:                 selectElement.style.width = 0;
jaroslav@1230:                 selectElement.style.width = originalWidth;
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         range: function (min, max) {
jaroslav@1230:             min = ko.utils.unwrapObservable(min);
jaroslav@1230:             max = ko.utils.unwrapObservable(max);
jaroslav@1230:             var result = [];
jaroslav@1230:             for (var i = min; i <= max; i++)
jaroslav@1230:                 result.push(i);
jaroslav@1230:             return result;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         makeArray: function(arrayLikeObject) {
jaroslav@1230:             var result = [];
jaroslav@1230:             for (var i = 0, j = arrayLikeObject.length; i < j; i++) {
jaroslav@1230:                 result.push(arrayLikeObject[i]);
jaroslav@1230:             };
jaroslav@1230:             return result;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         isIe6 : isIe6,
jaroslav@1230:         isIe7 : isIe7,
jaroslav@1230:         ieVersion : ieVersion,
jaroslav@1230: 
jaroslav@1230:         getFormFields: function(form, fieldName) {
jaroslav@1230:             var fields = ko.utils.makeArray(form.getElementsByTagName("input")).concat(ko.utils.makeArray(form.getElementsByTagName("textarea")));
jaroslav@1230:             var isMatchingField = (typeof fieldName == 'string')
jaroslav@1230:                 ? function(field) { return field.name === fieldName }
jaroslav@1230:                 : function(field) { return fieldName.test(field.name) }; // Treat fieldName as regex or object containing predicate
jaroslav@1230:             var matches = [];
jaroslav@1230:             for (var i = fields.length - 1; i >= 0; i--) {
jaroslav@1230:                 if (isMatchingField(fields[i]))
jaroslav@1230:                     matches.push(fields[i]);
jaroslav@1230:             };
jaroslav@1230:             return matches;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         parseJson: function (jsonString) {
jaroslav@1230:             if (typeof jsonString == "string") {
jaroslav@1230:                 jsonString = ko.utils.stringTrim(jsonString);
jaroslav@1230:                 if (jsonString) {
jaroslav@1230:                     if (window.JSON && window.JSON.parse) // Use native parsing where available
jaroslav@1230:                         return window.JSON.parse(jsonString);
jaroslav@1230:                     return (new Function("return " + jsonString))(); // Fallback on less safe parsing for older browsers
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230:             return null;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         stringifyJson: function (data, replacer, space) {   // replacer and space are optional
jaroslav@1230:             if ((typeof JSON == "undefined") || (typeof JSON.stringify == "undefined"))
jaroslav@1230:                 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");
jaroslav@1230:             return JSON.stringify(ko.utils.unwrapObservable(data), replacer, space);
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         postJson: function (urlOrForm, data, options) {
jaroslav@1230:             options = options || {};
jaroslav@1230:             var params = options['params'] || {};
jaroslav@1230:             var includeFields = options['includeFields'] || this.fieldsIncludedWithJsonPost;
jaroslav@1230:             var url = urlOrForm;
jaroslav@1230: 
jaroslav@1230:             // If we were given a form, use its 'action' URL and pick out any requested field values
jaroslav@1230:             if((typeof urlOrForm == 'object') && (ko.utils.tagNameLower(urlOrForm) === "form")) {
jaroslav@1230:                 var originalForm = urlOrForm;
jaroslav@1230:                 url = originalForm.action;
jaroslav@1230:                 for (var i = includeFields.length - 1; i >= 0; i--) {
jaroslav@1230:                     var fields = ko.utils.getFormFields(originalForm, includeFields[i]);
jaroslav@1230:                     for (var j = fields.length - 1; j >= 0; j--)
jaroslav@1230:                         params[fields[j].name] = fields[j].value;
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             data = ko.utils.unwrapObservable(data);
jaroslav@1230:             var form = document.createElement("form");
jaroslav@1230:             form.style.display = "none";
jaroslav@1230:             form.action = url;
jaroslav@1230:             form.method = "post";
jaroslav@1230:             for (var key in data) {
jaroslav@1230:                 var input = document.createElement("input");
jaroslav@1230:                 input.name = key;
jaroslav@1230:                 input.value = ko.utils.stringifyJson(ko.utils.unwrapObservable(data[key]));
jaroslav@1230:                 form.appendChild(input);
jaroslav@1230:             }
jaroslav@1230:             for (var key in params) {
jaroslav@1230:                 var input = document.createElement("input");
jaroslav@1230:                 input.name = key;
jaroslav@1230:                 input.value = params[key];
jaroslav@1230:                 form.appendChild(input);
jaroslav@1230:             }
jaroslav@1230:             document.body.appendChild(form);
jaroslav@1230:             options['submitter'] ? options['submitter'](form) : form.submit();
jaroslav@1230:             setTimeout(function () { form.parentNode.removeChild(form); }, 0);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('utils', ko.utils);
jaroslav@1230: ko.exportSymbol('utils.arrayForEach', ko.utils.arrayForEach);
jaroslav@1230: ko.exportSymbol('utils.arrayFirst', ko.utils.arrayFirst);
jaroslav@1230: ko.exportSymbol('utils.arrayFilter', ko.utils.arrayFilter);
jaroslav@1230: ko.exportSymbol('utils.arrayGetDistinctValues', ko.utils.arrayGetDistinctValues);
jaroslav@1230: ko.exportSymbol('utils.arrayIndexOf', ko.utils.arrayIndexOf);
jaroslav@1230: ko.exportSymbol('utils.arrayMap', ko.utils.arrayMap);
jaroslav@1230: ko.exportSymbol('utils.arrayPushAll', ko.utils.arrayPushAll);
jaroslav@1230: ko.exportSymbol('utils.arrayRemoveItem', ko.utils.arrayRemoveItem);
jaroslav@1230: ko.exportSymbol('utils.extend', ko.utils.extend);
jaroslav@1230: ko.exportSymbol('utils.fieldsIncludedWithJsonPost', ko.utils.fieldsIncludedWithJsonPost);
jaroslav@1230: ko.exportSymbol('utils.getFormFields', ko.utils.getFormFields);
jaroslav@1230: ko.exportSymbol('utils.peekObservable', ko.utils.peekObservable);
jaroslav@1230: ko.exportSymbol('utils.postJson', ko.utils.postJson);
jaroslav@1230: ko.exportSymbol('utils.parseJson', ko.utils.parseJson);
jaroslav@1230: ko.exportSymbol('utils.registerEventHandler', ko.utils.registerEventHandler);
jaroslav@1230: ko.exportSymbol('utils.stringifyJson', ko.utils.stringifyJson);
jaroslav@1230: ko.exportSymbol('utils.range', ko.utils.range);
jaroslav@1230: ko.exportSymbol('utils.toggleDomNodeCssClass', ko.utils.toggleDomNodeCssClass);
jaroslav@1230: ko.exportSymbol('utils.triggerEvent', ko.utils.triggerEvent);
jaroslav@1230: ko.exportSymbol('utils.unwrapObservable', ko.utils.unwrapObservable);
jaroslav@1230: 
jaroslav@1230: if (!Function.prototype['bind']) {
jaroslav@1230:     // 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)
jaroslav@1230:     // In case the browser doesn't implement it natively, provide a JavaScript implementation. This implementation is based on the one in prototype.js
jaroslav@1230:     Function.prototype['bind'] = function (object) {
jaroslav@1230:         var originalFunction = this, args = Array.prototype.slice.call(arguments), object = args.shift();
jaroslav@1230:         return function () {
jaroslav@1230:             return originalFunction.apply(object, args.concat(Array.prototype.slice.call(arguments)));
jaroslav@1230:         };
jaroslav@1230:     };
jaroslav@1230: }
jaroslav@1230: 
jaroslav@1230: ko.utils.domData = new (function () {
jaroslav@1230:     var uniqueId = 0;
jaroslav@1230:     var dataStoreKeyExpandoPropertyName = "__ko__" + (new Date).getTime();
jaroslav@1230:     var dataStore = {};
jaroslav@1230:     return {
jaroslav@1230:         get: function (node, key) {
jaroslav@1230:             var allDataForNode = ko.utils.domData.getAll(node, false);
jaroslav@1230:             return allDataForNode === undefined ? undefined : allDataForNode[key];
jaroslav@1230:         },
jaroslav@1230:         set: function (node, key, value) {
jaroslav@1230:             if (value === undefined) {
jaroslav@1230:                 // Make sure we don't actually create a new domData key if we are actually deleting a value
jaroslav@1230:                 if (ko.utils.domData.getAll(node, false) === undefined)
jaroslav@1230:                     return;
jaroslav@1230:             }
jaroslav@1230:             var allDataForNode = ko.utils.domData.getAll(node, true);
jaroslav@1230:             allDataForNode[key] = value;
jaroslav@1230:         },
jaroslav@1230:         getAll: function (node, createIfNotFound) {
jaroslav@1230:             var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
jaroslav@1230:             var hasExistingDataStore = dataStoreKey && (dataStoreKey !== "null") && dataStore[dataStoreKey];
jaroslav@1230:             if (!hasExistingDataStore) {
jaroslav@1230:                 if (!createIfNotFound)
jaroslav@1230:                     return undefined;
jaroslav@1230:                 dataStoreKey = node[dataStoreKeyExpandoPropertyName] = "ko" + uniqueId++;
jaroslav@1230:                 dataStore[dataStoreKey] = {};
jaroslav@1230:             }
jaroslav@1230:             return dataStore[dataStoreKey];
jaroslav@1230:         },
jaroslav@1230:         clear: function (node) {
jaroslav@1230:             var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
jaroslav@1230:             if (dataStoreKey) {
jaroslav@1230:                 delete dataStore[dataStoreKey];
jaroslav@1230:                 node[dataStoreKeyExpandoPropertyName] = null;
jaroslav@1230:                 return true; // Exposing "did clean" flag purely so specs can infer whether things have been cleaned up as intended
jaroslav@1230:             }
jaroslav@1230:             return false;
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('utils.domData', ko.utils.domData);
jaroslav@1230: ko.exportSymbol('utils.domData.clear', ko.utils.domData.clear); // Exporting only so specs can clear up after themselves fully
jaroslav@1230: 
jaroslav@1230: ko.utils.domNodeDisposal = new (function () {
jaroslav@1230:     var domDataKey = "__ko_domNodeDisposal__" + (new Date).getTime();
jaroslav@1230:     var cleanableNodeTypes = { 1: true, 8: true, 9: true };       // Element, Comment, Document
jaroslav@1230:     var cleanableNodeTypesWithDescendants = { 1: true, 9: true }; // Element, Document
jaroslav@1230: 
jaroslav@1230:     function getDisposeCallbacksCollection(node, createIfNotFound) {
jaroslav@1230:         var allDisposeCallbacks = ko.utils.domData.get(node, domDataKey);
jaroslav@1230:         if ((allDisposeCallbacks === undefined) && createIfNotFound) {
jaroslav@1230:             allDisposeCallbacks = [];
jaroslav@1230:             ko.utils.domData.set(node, domDataKey, allDisposeCallbacks);
jaroslav@1230:         }
jaroslav@1230:         return allDisposeCallbacks;
jaroslav@1230:     }
jaroslav@1230:     function destroyCallbacksCollection(node) {
jaroslav@1230:         ko.utils.domData.set(node, domDataKey, undefined);
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function cleanSingleNode(node) {
jaroslav@1230:         // Run all the dispose callbacks
jaroslav@1230:         var callbacks = getDisposeCallbacksCollection(node, false);
jaroslav@1230:         if (callbacks) {
jaroslav@1230:             callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)
jaroslav@1230:             for (var i = 0; i < callbacks.length; i++)
jaroslav@1230:                 callbacks[i](node);
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         // Also erase the DOM data
jaroslav@1230:         ko.utils.domData.clear(node);
jaroslav@1230: 
jaroslav@1230:         // Special support for jQuery here because it's so commonly used.
jaroslav@1230:         // Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData
jaroslav@1230:         // so notify it to tear down any resources associated with the node & descendants here.
jaroslav@1230:         if ((typeof jQuery == "function") && (typeof jQuery['cleanData'] == "function"))
jaroslav@1230:             jQuery['cleanData']([node]);
jaroslav@1230: 
jaroslav@1230:         // Also clear any immediate-child comment nodes, as these wouldn't have been found by
jaroslav@1230:         // node.getElementsByTagName("*") in cleanNode() (comment nodes aren't elements)
jaroslav@1230:         if (cleanableNodeTypesWithDescendants[node.nodeType])
jaroslav@1230:             cleanImmediateCommentTypeChildren(node);
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function cleanImmediateCommentTypeChildren(nodeWithChildren) {
jaroslav@1230:         var child, nextChild = nodeWithChildren.firstChild;
jaroslav@1230:         while (child = nextChild) {
jaroslav@1230:             nextChild = child.nextSibling;
jaroslav@1230:             if (child.nodeType === 8)
jaroslav@1230:                 cleanSingleNode(child);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     return {
jaroslav@1230:         addDisposeCallback : function(node, callback) {
jaroslav@1230:             if (typeof callback != "function")
jaroslav@1230:                 throw new Error("Callback must be a function");
jaroslav@1230:             getDisposeCallbacksCollection(node, true).push(callback);
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         removeDisposeCallback : function(node, callback) {
jaroslav@1230:             var callbacksCollection = getDisposeCallbacksCollection(node, false);
jaroslav@1230:             if (callbacksCollection) {
jaroslav@1230:                 ko.utils.arrayRemoveItem(callbacksCollection, callback);
jaroslav@1230:                 if (callbacksCollection.length == 0)
jaroslav@1230:                     destroyCallbacksCollection(node);
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         cleanNode : function(node) {
jaroslav@1230:             // First clean this node, where applicable
jaroslav@1230:             if (cleanableNodeTypes[node.nodeType]) {
jaroslav@1230:                 cleanSingleNode(node);
jaroslav@1230: 
jaroslav@1230:                 // ... then its descendants, where applicable
jaroslav@1230:                 if (cleanableNodeTypesWithDescendants[node.nodeType]) {
jaroslav@1230:                     // Clone the descendants list in case it changes during iteration
jaroslav@1230:                     var descendants = [];
jaroslav@1230:                     ko.utils.arrayPushAll(descendants, node.getElementsByTagName("*"));
jaroslav@1230:                     for (var i = 0, j = descendants.length; i < j; i++)
jaroslav@1230:                         cleanSingleNode(descendants[i]);
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230:             return node;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         removeNode : function(node) {
jaroslav@1230:             ko.cleanNode(node);
jaroslav@1230:             if (node.parentNode)
jaroslav@1230:                 node.parentNode.removeChild(node);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: })();
jaroslav@1230: ko.cleanNode = ko.utils.domNodeDisposal.cleanNode; // Shorthand name for convenience
jaroslav@1230: ko.removeNode = ko.utils.domNodeDisposal.removeNode; // Shorthand name for convenience
jaroslav@1230: ko.exportSymbol('cleanNode', ko.cleanNode);
jaroslav@1230: ko.exportSymbol('removeNode', ko.removeNode);
jaroslav@1230: ko.exportSymbol('utils.domNodeDisposal', ko.utils.domNodeDisposal);
jaroslav@1230: ko.exportSymbol('utils.domNodeDisposal.addDisposeCallback', ko.utils.domNodeDisposal.addDisposeCallback);
jaroslav@1230: ko.exportSymbol('utils.domNodeDisposal.removeDisposeCallback', ko.utils.domNodeDisposal.removeDisposeCallback);
jaroslav@1230: (function () {
jaroslav@1230:     var leadingCommentRegex = /^(\s*)<!--(.*?)-->/;
jaroslav@1230: 
jaroslav@1230:     function simpleHtmlParse(html) {
jaroslav@1230:         // Based on jQuery's "clean" function, but only accounting for table-related elements.
jaroslav@1230:         // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's "clean" function directly
jaroslav@1230: 
jaroslav@1230:         // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of
jaroslav@1230:         // a descendant node. For example: "<div><!-- mycomment -->abc</div>" will get parsed as "<div>abc</div>"
jaroslav@1230:         // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node
jaroslav@1230:         // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.
jaroslav@1230: 
jaroslav@1230:         // Trim whitespace, otherwise indexOf won't work as expected
jaroslav@1230:         var tags = ko.utils.stringTrim(html).toLowerCase(), div = document.createElement("div");
jaroslav@1230: 
jaroslav@1230:         // Finds the first match from the left column, and returns the corresponding "wrap" data from the right column
jaroslav@1230:         var wrap = tags.match(/^<(thead|tbody|tfoot)/)              && [1, "<table>", "</table>"] ||
jaroslav@1230:                    !tags.indexOf("<tr")                             && [2, "<table><tbody>", "</tbody></table>"] ||
jaroslav@1230:                    (!tags.indexOf("<td") || !tags.indexOf("<th"))   && [3, "<table><tbody><tr>", "</tr></tbody></table>"] ||
jaroslav@1230:                    /* anything else */                                 [0, "", ""];
jaroslav@1230: 
jaroslav@1230:         // Go to html and back, then peel off extra wrappers
jaroslav@1230:         // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.
jaroslav@1230:         var markup = "ignored<div>" + wrap[1] + html + wrap[2] + "</div>";
jaroslav@1230:         if (typeof window['innerShiv'] == "function") {
jaroslav@1230:             div.appendChild(window['innerShiv'](markup));
jaroslav@1230:         } else {
jaroslav@1230:             div.innerHTML = markup;
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         // Move to the right depth
jaroslav@1230:         while (wrap[0]--)
jaroslav@1230:             div = div.lastChild;
jaroslav@1230: 
jaroslav@1230:         return ko.utils.makeArray(div.lastChild.childNodes);
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function jQueryHtmlParse(html) {
jaroslav@1230:         // jQuery's "parseHTML" function was introduced in jQuery 1.8.0 and is a documented public API.
jaroslav@1230:         if (jQuery['parseHTML']) {
jaroslav@1230:             return jQuery['parseHTML'](html);
jaroslav@1230:         } else {
jaroslav@1230:             // For jQuery < 1.8.0, we fall back on the undocumented internal "clean" function.
jaroslav@1230:             var elems = jQuery['clean']([html]);
jaroslav@1230: 
jaroslav@1230:             // 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.
jaroslav@1230:             // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.
jaroslav@1230:             // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.
jaroslav@1230:             if (elems && elems[0]) {
jaroslav@1230:                 // Find the top-most parent element that's a direct child of a document fragment
jaroslav@1230:                 var elem = elems[0];
jaroslav@1230:                 while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)
jaroslav@1230:                     elem = elem.parentNode;
jaroslav@1230:                 // ... then detach it
jaroslav@1230:                 if (elem.parentNode)
jaroslav@1230:                     elem.parentNode.removeChild(elem);
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             return elems;
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     ko.utils.parseHtmlFragment = function(html) {
jaroslav@1230:         return typeof jQuery != 'undefined' ? jQueryHtmlParse(html)   // As below, benefit from jQuery's optimisations where possible
jaroslav@1230:                                             : simpleHtmlParse(html);  // ... otherwise, this simple logic will do in most common cases.
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.utils.setHtml = function(node, html) {
jaroslav@1230:         ko.utils.emptyDomNode(node);
jaroslav@1230: 
jaroslav@1230:         // There's no legitimate reason to display a stringified observable without unwrapping it, so we'll unwrap it
jaroslav@1230:         html = ko.utils.unwrapObservable(html);
jaroslav@1230: 
jaroslav@1230:         if ((html !== null) && (html !== undefined)) {
jaroslav@1230:             if (typeof html != 'string')
jaroslav@1230:                 html = html.toString();
jaroslav@1230: 
jaroslav@1230:             // jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,
jaroslav@1230:             // for example <tr> elements which are not normally allowed to exist on their own.
jaroslav@1230:             // If you've referenced jQuery we'll use that rather than duplicating its code.
jaroslav@1230:             if (typeof jQuery != 'undefined') {
jaroslav@1230:                 jQuery(node)['html'](html);
jaroslav@1230:             } else {
jaroslav@1230:                 // ... otherwise, use KO's own parsing logic.
jaroslav@1230:                 var parsedNodes = ko.utils.parseHtmlFragment(html);
jaroslav@1230:                 for (var i = 0; i < parsedNodes.length; i++)
jaroslav@1230:                     node.appendChild(parsedNodes[i]);
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('utils.parseHtmlFragment', ko.utils.parseHtmlFragment);
jaroslav@1230: ko.exportSymbol('utils.setHtml', ko.utils.setHtml);
jaroslav@1230: 
jaroslav@1230: ko.memoization = (function () {
jaroslav@1230:     var memos = {};
jaroslav@1230: 
jaroslav@1230:     function randomMax8HexChars() {
jaroslav@1230:         return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);
jaroslav@1230:     }
jaroslav@1230:     function generateRandomId() {
jaroslav@1230:         return randomMax8HexChars() + randomMax8HexChars();
jaroslav@1230:     }
jaroslav@1230:     function findMemoNodes(rootNode, appendToArray) {
jaroslav@1230:         if (!rootNode)
jaroslav@1230:             return;
jaroslav@1230:         if (rootNode.nodeType == 8) {
jaroslav@1230:             var memoId = ko.memoization.parseMemoText(rootNode.nodeValue);
jaroslav@1230:             if (memoId != null)
jaroslav@1230:                 appendToArray.push({ domNode: rootNode, memoId: memoId });
jaroslav@1230:         } else if (rootNode.nodeType == 1) {
jaroslav@1230:             for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)
jaroslav@1230:                 findMemoNodes(childNodes[i], appendToArray);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     return {
jaroslav@1230:         memoize: function (callback) {
jaroslav@1230:             if (typeof callback != "function")
jaroslav@1230:                 throw new Error("You can only pass a function to ko.memoization.memoize()");
jaroslav@1230:             var memoId = generateRandomId();
jaroslav@1230:             memos[memoId] = callback;
jaroslav@1230:             return "<!--[ko_memo:" + memoId + "]-->";
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         unmemoize: function (memoId, callbackParams) {
jaroslav@1230:             var callback = memos[memoId];
jaroslav@1230:             if (callback === undefined)
jaroslav@1230:                 throw new Error("Couldn't find any memo with ID " + memoId + ". Perhaps it's already been unmemoized.");
jaroslav@1230:             try {
jaroslav@1230:                 callback.apply(null, callbackParams || []);
jaroslav@1230:                 return true;
jaroslav@1230:             }
jaroslav@1230:             finally { delete memos[memoId]; }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         unmemoizeDomNodeAndDescendants: function (domNode, extraCallbackParamsArray) {
jaroslav@1230:             var memos = [];
jaroslav@1230:             findMemoNodes(domNode, memos);
jaroslav@1230:             for (var i = 0, j = memos.length; i < j; i++) {
jaroslav@1230:                 var node = memos[i].domNode;
jaroslav@1230:                 var combinedParams = [node];
jaroslav@1230:                 if (extraCallbackParamsArray)
jaroslav@1230:                     ko.utils.arrayPushAll(combinedParams, extraCallbackParamsArray);
jaroslav@1230:                 ko.memoization.unmemoize(memos[i].memoId, combinedParams);
jaroslav@1230:                 node.nodeValue = ""; // Neuter this node so we don't try to unmemoize it again
jaroslav@1230:                 if (node.parentNode)
jaroslav@1230:                     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)
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         parseMemoText: function (memoText) {
jaroslav@1230:             var match = memoText.match(/^\[ko_memo\:(.*?)\]$/);
jaroslav@1230:             return match ? match[1] : null;
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('memoization', ko.memoization);
jaroslav@1230: ko.exportSymbol('memoization.memoize', ko.memoization.memoize);
jaroslav@1230: ko.exportSymbol('memoization.unmemoize', ko.memoization.unmemoize);
jaroslav@1230: ko.exportSymbol('memoization.parseMemoText', ko.memoization.parseMemoText);
jaroslav@1230: ko.exportSymbol('memoization.unmemoizeDomNodeAndDescendants', ko.memoization.unmemoizeDomNodeAndDescendants);
jaroslav@1230: ko.extenders = {
jaroslav@1230:     'throttle': function(target, timeout) {
jaroslav@1230:         // Throttling means two things:
jaroslav@1230: 
jaroslav@1230:         // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies
jaroslav@1230:         //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate
jaroslav@1230:         target['throttleEvaluation'] = timeout;
jaroslav@1230: 
jaroslav@1230:         // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*
jaroslav@1230:         //     so the target cannot change value synchronously or faster than a certain rate
jaroslav@1230:         var writeTimeoutInstance = null;
jaroslav@1230:         return ko.dependentObservable({
jaroslav@1230:             'read': target,
jaroslav@1230:             'write': function(value) {
jaroslav@1230:                 clearTimeout(writeTimeoutInstance);
jaroslav@1230:                 writeTimeoutInstance = setTimeout(function() {
jaroslav@1230:                     target(value);
jaroslav@1230:                 }, timeout);
jaroslav@1230:             }
jaroslav@1230:         });
jaroslav@1230:     },
jaroslav@1230: 
jaroslav@1230:     'notify': function(target, notifyWhen) {
jaroslav@1230:         target["equalityComparer"] = notifyWhen == "always"
jaroslav@1230:             ? function() { return false } // Treat all values as not equal
jaroslav@1230:             : ko.observable["fn"]["equalityComparer"];
jaroslav@1230:         return target;
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: function applyExtenders(requestedExtenders) {
jaroslav@1230:     var target = this;
jaroslav@1230:     if (requestedExtenders) {
jaroslav@1230:         for (var key in requestedExtenders) {
jaroslav@1230:             var extenderHandler = ko.extenders[key];
jaroslav@1230:             if (typeof extenderHandler == 'function') {
jaroslav@1230:                 target = extenderHandler(target, requestedExtenders[key]);
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230:     return target;
jaroslav@1230: }
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('extenders', ko.extenders);
jaroslav@1230: 
jaroslav@1230: ko.subscription = function (target, callback, disposeCallback) {
jaroslav@1230:     this.target = target;
jaroslav@1230:     this.callback = callback;
jaroslav@1230:     this.disposeCallback = disposeCallback;
jaroslav@1230:     ko.exportProperty(this, 'dispose', this.dispose);
jaroslav@1230: };
jaroslav@1230: ko.subscription.prototype.dispose = function () {
jaroslav@1230:     this.isDisposed = true;
jaroslav@1230:     this.disposeCallback();
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.subscribable = function () {
jaroslav@1230:     this._subscriptions = {};
jaroslav@1230: 
jaroslav@1230:     ko.utils.extend(this, ko.subscribable['fn']);
jaroslav@1230:     ko.exportProperty(this, 'subscribe', this.subscribe);
jaroslav@1230:     ko.exportProperty(this, 'extend', this.extend);
jaroslav@1230:     ko.exportProperty(this, 'getSubscriptionsCount', this.getSubscriptionsCount);
jaroslav@1230: }
jaroslav@1230: 
jaroslav@1230: var defaultEvent = "change";
jaroslav@1230: 
jaroslav@1230: ko.subscribable['fn'] = {
jaroslav@1230:     subscribe: function (callback, callbackTarget, event) {
jaroslav@1230:         event = event || defaultEvent;
jaroslav@1230:         var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;
jaroslav@1230: 
jaroslav@1230:         var subscription = new ko.subscription(this, boundCallback, function () {
jaroslav@1230:             ko.utils.arrayRemoveItem(this._subscriptions[event], subscription);
jaroslav@1230:         }.bind(this));
jaroslav@1230: 
jaroslav@1230:         if (!this._subscriptions[event])
jaroslav@1230:             this._subscriptions[event] = [];
jaroslav@1230:         this._subscriptions[event].push(subscription);
jaroslav@1230:         return subscription;
jaroslav@1230:     },
jaroslav@1230: 
jaroslav@1230:     "notifySubscribers": function (valueToNotify, event) {
jaroslav@1230:         event = event || defaultEvent;
jaroslav@1230:         if (this._subscriptions[event]) {
jaroslav@1230:             ko.dependencyDetection.ignore(function() {
jaroslav@1230:                 ko.utils.arrayForEach(this._subscriptions[event].slice(0), function (subscription) {
jaroslav@1230:                     // In case a subscription was disposed during the arrayForEach cycle, check
jaroslav@1230:                     // for isDisposed on each subscription before invoking its callback
jaroslav@1230:                     if (subscription && (subscription.isDisposed !== true))
jaroslav@1230:                         subscription.callback(valueToNotify);
jaroslav@1230:                 });
jaroslav@1230:             }, this);
jaroslav@1230:         }
jaroslav@1230:     },
jaroslav@1230: 
jaroslav@1230:     getSubscriptionsCount: function () {
jaroslav@1230:         var total = 0;
jaroslav@1230:         for (var eventName in this._subscriptions) {
jaroslav@1230:             if (this._subscriptions.hasOwnProperty(eventName))
jaroslav@1230:                 total += this._subscriptions[eventName].length;
jaroslav@1230:         }
jaroslav@1230:         return total;
jaroslav@1230:     },
jaroslav@1230: 
jaroslav@1230:     extend: applyExtenders
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: 
jaroslav@1230: ko.isSubscribable = function (instance) {
jaroslav@1230:     return typeof instance.subscribe == "function" && typeof instance["notifySubscribers"] == "function";
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('subscribable', ko.subscribable);
jaroslav@1230: ko.exportSymbol('isSubscribable', ko.isSubscribable);
jaroslav@1230: 
jaroslav@1230: ko.dependencyDetection = (function () {
jaroslav@1230:     var _frames = [];
jaroslav@1230: 
jaroslav@1230:     return {
jaroslav@1230:         begin: function (callback) {
jaroslav@1230:             _frames.push({ callback: callback, distinctDependencies:[] });
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         end: function () {
jaroslav@1230:             _frames.pop();
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         registerDependency: function (subscribable) {
jaroslav@1230:             if (!ko.isSubscribable(subscribable))
jaroslav@1230:                 throw new Error("Only subscribable things can act as dependencies");
jaroslav@1230:             if (_frames.length > 0) {
jaroslav@1230:                 var topFrame = _frames[_frames.length - 1];
jaroslav@1230:                 if (!topFrame || ko.utils.arrayIndexOf(topFrame.distinctDependencies, subscribable) >= 0)
jaroslav@1230:                     return;
jaroslav@1230:                 topFrame.distinctDependencies.push(subscribable);
jaroslav@1230:                 topFrame.callback(subscribable);
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         ignore: function(callback, callbackTarget, callbackArgs) {
jaroslav@1230:             try {
jaroslav@1230:                 _frames.push(null);
jaroslav@1230:                 return callback.apply(callbackTarget, callbackArgs || []);
jaroslav@1230:             } finally {
jaroslav@1230:                 _frames.pop();
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: })();
jaroslav@1230: var primitiveTypes = { 'undefined':true, 'boolean':true, 'number':true, 'string':true };
jaroslav@1230: 
jaroslav@1230: ko.observable = function (initialValue) {
jaroslav@1230:     var _latestValue = initialValue;
jaroslav@1230: 
jaroslav@1230:     function observable() {
jaroslav@1230:         if (arguments.length > 0) {
jaroslav@1230:             // Write
jaroslav@1230: 
jaroslav@1230:             // Ignore writes if the value hasn't changed
jaroslav@1230:             if ((!observable['equalityComparer']) || !observable['equalityComparer'](_latestValue, arguments[0])) {
jaroslav@1230:                 observable.valueWillMutate();
jaroslav@1230:                 _latestValue = arguments[0];
jaroslav@1230:                 if (DEBUG) observable._latestValue = _latestValue;
jaroslav@1230:                 observable.valueHasMutated();
jaroslav@1230:             }
jaroslav@1230:             return this; // Permits chained assignments
jaroslav@1230:         }
jaroslav@1230:         else {
jaroslav@1230:             // Read
jaroslav@1230:             ko.dependencyDetection.registerDependency(observable); // The caller only needs to be notified of changes if they did a "read" operation
jaroslav@1230:             return _latestValue;
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230:     if (DEBUG) observable._latestValue = _latestValue;
jaroslav@1230:     ko.subscribable.call(observable);
jaroslav@1230:     observable.peek = function() { return _latestValue };
jaroslav@1230:     observable.valueHasMutated = function () { observable["notifySubscribers"](_latestValue); }
jaroslav@1230:     observable.valueWillMutate = function () { observable["notifySubscribers"](_latestValue, "beforeChange"); }
jaroslav@1230:     ko.utils.extend(observable, ko.observable['fn']);
jaroslav@1230: 
jaroslav@1230:     ko.exportProperty(observable, 'peek', observable.peek);
jaroslav@1230:     ko.exportProperty(observable, "valueHasMutated", observable.valueHasMutated);
jaroslav@1230:     ko.exportProperty(observable, "valueWillMutate", observable.valueWillMutate);
jaroslav@1230: 
jaroslav@1230:     return observable;
jaroslav@1230: }
jaroslav@1230: 
jaroslav@1230: ko.observable['fn'] = {
jaroslav@1230:     "equalityComparer": function valuesArePrimitiveAndEqual(a, b) {
jaroslav@1230:         var oldValueIsPrimitive = (a === null) || (typeof(a) in primitiveTypes);
jaroslav@1230:         return oldValueIsPrimitive ? (a === b) : false;
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: var protoProperty = ko.observable.protoProperty = "__ko_proto__";
jaroslav@1230: ko.observable['fn'][protoProperty] = ko.observable;
jaroslav@1230: 
jaroslav@1230: ko.hasPrototype = function(instance, prototype) {
jaroslav@1230:     if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined)) return false;
jaroslav@1230:     if (instance[protoProperty] === prototype) return true;
jaroslav@1230:     return ko.hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.isObservable = function (instance) {
jaroslav@1230:     return ko.hasPrototype(instance, ko.observable);
jaroslav@1230: }
jaroslav@1230: ko.isWriteableObservable = function (instance) {
jaroslav@1230:     // Observable
jaroslav@1230:     if ((typeof instance == "function") && instance[protoProperty] === ko.observable)
jaroslav@1230:         return true;
jaroslav@1230:     // Writeable dependent observable
jaroslav@1230:     if ((typeof instance == "function") && (instance[protoProperty] === ko.dependentObservable) && (instance.hasWriteFunction))
jaroslav@1230:         return true;
jaroslav@1230:     // Anything else
jaroslav@1230:     return false;
jaroslav@1230: }
jaroslav@1230: 
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('observable', ko.observable);
jaroslav@1230: ko.exportSymbol('isObservable', ko.isObservable);
jaroslav@1230: ko.exportSymbol('isWriteableObservable', ko.isWriteableObservable);
jaroslav@1230: ko.observableArray = function (initialValues) {
jaroslav@1230:     if (arguments.length == 0) {
jaroslav@1230:         // Zero-parameter constructor initializes to empty array
jaroslav@1230:         initialValues = [];
jaroslav@1230:     }
jaroslav@1230:     if ((initialValues !== null) && (initialValues !== undefined) && !('length' in initialValues))
jaroslav@1230:         throw new Error("The argument passed when initializing an observable array must be an array, or null, or undefined.");
jaroslav@1230: 
jaroslav@1230:     var result = ko.observable(initialValues);
jaroslav@1230:     ko.utils.extend(result, ko.observableArray['fn']);
jaroslav@1230:     return result;
jaroslav@1230: }
jaroslav@1230: 
jaroslav@1230: ko.observableArray['fn'] = {
jaroslav@1230:     'remove': function (valueOrPredicate) {
jaroslav@1230:         var underlyingArray = this.peek();
jaroslav@1230:         var removedValues = [];
jaroslav@1230:         var predicate = typeof valueOrPredicate == "function" ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
jaroslav@1230:         for (var i = 0; i < underlyingArray.length; i++) {
jaroslav@1230:             var value = underlyingArray[i];
jaroslav@1230:             if (predicate(value)) {
jaroslav@1230:                 if (removedValues.length === 0) {
jaroslav@1230:                     this.valueWillMutate();
jaroslav@1230:                 }
jaroslav@1230:                 removedValues.push(value);
jaroslav@1230:                 underlyingArray.splice(i, 1);
jaroslav@1230:                 i--;
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:         if (removedValues.length) {
jaroslav@1230:             this.valueHasMutated();
jaroslav@1230:         }
jaroslav@1230:         return removedValues;
jaroslav@1230:     },
jaroslav@1230: 
jaroslav@1230:     'removeAll': function (arrayOfValues) {
jaroslav@1230:         // If you passed zero args, we remove everything
jaroslav@1230:         if (arrayOfValues === undefined) {
jaroslav@1230:             var underlyingArray = this.peek();
jaroslav@1230:             var allValues = underlyingArray.slice(0);
jaroslav@1230:             this.valueWillMutate();
jaroslav@1230:             underlyingArray.splice(0, underlyingArray.length);
jaroslav@1230:             this.valueHasMutated();
jaroslav@1230:             return allValues;
jaroslav@1230:         }
jaroslav@1230:         // If you passed an arg, we interpret it as an array of entries to remove
jaroslav@1230:         if (!arrayOfValues)
jaroslav@1230:             return [];
jaroslav@1230:         return this['remove'](function (value) {
jaroslav@1230:             return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0;
jaroslav@1230:         });
jaroslav@1230:     },
jaroslav@1230: 
jaroslav@1230:     'destroy': function (valueOrPredicate) {
jaroslav@1230:         var underlyingArray = this.peek();
jaroslav@1230:         var predicate = typeof valueOrPredicate == "function" ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
jaroslav@1230:         this.valueWillMutate();
jaroslav@1230:         for (var i = underlyingArray.length - 1; i >= 0; i--) {
jaroslav@1230:             var value = underlyingArray[i];
jaroslav@1230:             if (predicate(value))
jaroslav@1230:                 underlyingArray[i]["_destroy"] = true;
jaroslav@1230:         }
jaroslav@1230:         this.valueHasMutated();
jaroslav@1230:     },
jaroslav@1230: 
jaroslav@1230:     'destroyAll': function (arrayOfValues) {
jaroslav@1230:         // If you passed zero args, we destroy everything
jaroslav@1230:         if (arrayOfValues === undefined)
jaroslav@1230:             return this['destroy'](function() { return true });
jaroslav@1230: 
jaroslav@1230:         // If you passed an arg, we interpret it as an array of entries to destroy
jaroslav@1230:         if (!arrayOfValues)
jaroslav@1230:             return [];
jaroslav@1230:         return this['destroy'](function (value) {
jaroslav@1230:             return ko.utils.arrayIndexOf(arrayOfValues, value) >= 0;
jaroslav@1230:         });
jaroslav@1230:     },
jaroslav@1230: 
jaroslav@1230:     'indexOf': function (item) {
jaroslav@1230:         var underlyingArray = this();
jaroslav@1230:         return ko.utils.arrayIndexOf(underlyingArray, item);
jaroslav@1230:     },
jaroslav@1230: 
jaroslav@1230:     'replace': function(oldItem, newItem) {
jaroslav@1230:         var index = this['indexOf'](oldItem);
jaroslav@1230:         if (index >= 0) {
jaroslav@1230:             this.valueWillMutate();
jaroslav@1230:             this.peek()[index] = newItem;
jaroslav@1230:             this.valueHasMutated();
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: }
jaroslav@1230: 
jaroslav@1230: // Populate ko.observableArray.fn with read/write functions from native arrays
jaroslav@1230: // Important: Do not add any additional functions here that may reasonably be used to *read* data from the array
jaroslav@1230: // because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale
jaroslav@1230: ko.utils.arrayForEach(["pop", "push", "reverse", "shift", "sort", "splice", "unshift"], function (methodName) {
jaroslav@1230:     ko.observableArray['fn'][methodName] = function () {
jaroslav@1230:         // Use "peek" to avoid creating a subscription in any computed that we're executing in the context of
jaroslav@1230:         // (for consistency with mutating regular observables)
jaroslav@1230:         var underlyingArray = this.peek();
jaroslav@1230:         this.valueWillMutate();
jaroslav@1230:         var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);
jaroslav@1230:         this.valueHasMutated();
jaroslav@1230:         return methodCallResult;
jaroslav@1230:     };
jaroslav@1230: });
jaroslav@1230: 
jaroslav@1230: // Populate ko.observableArray.fn with read-only functions from native arrays
jaroslav@1230: ko.utils.arrayForEach(["slice"], function (methodName) {
jaroslav@1230:     ko.observableArray['fn'][methodName] = function () {
jaroslav@1230:         var underlyingArray = this();
jaroslav@1230:         return underlyingArray[methodName].apply(underlyingArray, arguments);
jaroslav@1230:     };
jaroslav@1230: });
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('observableArray', ko.observableArray);
jaroslav@1230: ko.dependentObservable = function (evaluatorFunctionOrOptions, evaluatorFunctionTarget, options) {
jaroslav@1230:     var _latestValue,
jaroslav@1230:         _hasBeenEvaluated = false,
jaroslav@1230:         _isBeingEvaluated = false,
jaroslav@1230:         readFunction = evaluatorFunctionOrOptions;
jaroslav@1230: 
jaroslav@1230:     if (readFunction && typeof readFunction == "object") {
jaroslav@1230:         // Single-parameter syntax - everything is on this "options" param
jaroslav@1230:         options = readFunction;
jaroslav@1230:         readFunction = options["read"];
jaroslav@1230:     } else {
jaroslav@1230:         // Multi-parameter syntax - construct the options according to the params passed
jaroslav@1230:         options = options || {};
jaroslav@1230:         if (!readFunction)
jaroslav@1230:             readFunction = options["read"];
jaroslav@1230:     }
jaroslav@1230:     if (typeof readFunction != "function")
jaroslav@1230:         throw new Error("Pass a function that returns the value of the ko.computed");
jaroslav@1230: 
jaroslav@1230:     function addSubscriptionToDependency(subscribable) {
jaroslav@1230:         _subscriptionsToDependencies.push(subscribable.subscribe(evaluatePossiblyAsync));
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function disposeAllSubscriptionsToDependencies() {
jaroslav@1230:         ko.utils.arrayForEach(_subscriptionsToDependencies, function (subscription) {
jaroslav@1230:             subscription.dispose();
jaroslav@1230:         });
jaroslav@1230:         _subscriptionsToDependencies = [];
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function evaluatePossiblyAsync() {
jaroslav@1230:         var throttleEvaluationTimeout = dependentObservable['throttleEvaluation'];
jaroslav@1230:         if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {
jaroslav@1230:             clearTimeout(evaluationTimeoutInstance);
jaroslav@1230:             evaluationTimeoutInstance = setTimeout(evaluateImmediate, throttleEvaluationTimeout);
jaroslav@1230:         } else
jaroslav@1230:             evaluateImmediate();
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function evaluateImmediate() {
jaroslav@1230:         if (_isBeingEvaluated) {
jaroslav@1230:             // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.
jaroslav@1230:             // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost
jaroslav@1230:             // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing
jaroslav@1230:             // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387
jaroslav@1230:             return;
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         // Don't dispose on first evaluation, because the "disposeWhen" callback might
jaroslav@1230:         // e.g., dispose when the associated DOM element isn't in the doc, and it's not
jaroslav@1230:         // going to be in the doc until *after* the first evaluation
jaroslav@1230:         if (_hasBeenEvaluated && disposeWhen()) {
jaroslav@1230:             dispose();
jaroslav@1230:             return;
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         _isBeingEvaluated = true;
jaroslav@1230:         try {
jaroslav@1230:             // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).
jaroslav@1230:             // Then, during evaluation, we cross off any that are in fact still being used.
jaroslav@1230:             var disposalCandidates = ko.utils.arrayMap(_subscriptionsToDependencies, function(item) {return item.target;});
jaroslav@1230: 
jaroslav@1230:             ko.dependencyDetection.begin(function(subscribable) {
jaroslav@1230:                 var inOld;
jaroslav@1230:                 if ((inOld = ko.utils.arrayIndexOf(disposalCandidates, subscribable)) >= 0)
jaroslav@1230:                     disposalCandidates[inOld] = undefined; // Don't want to dispose this subscription, as it's still being used
jaroslav@1230:                 else
jaroslav@1230:                     addSubscriptionToDependency(subscribable); // Brand new subscription - add it
jaroslav@1230:             });
jaroslav@1230: 
jaroslav@1230:             var newValue = readFunction.call(evaluatorFunctionTarget);
jaroslav@1230: 
jaroslav@1230:             // For each subscription no longer being used, remove it from the active subscriptions list and dispose it
jaroslav@1230:             for (var i = disposalCandidates.length - 1; i >= 0; i--) {
jaroslav@1230:                 if (disposalCandidates[i])
jaroslav@1230:                     _subscriptionsToDependencies.splice(i, 1)[0].dispose();
jaroslav@1230:             }
jaroslav@1230:             _hasBeenEvaluated = true;
jaroslav@1230: 
jaroslav@1230:             dependentObservable["notifySubscribers"](_latestValue, "beforeChange");
jaroslav@1230:             _latestValue = newValue;
jaroslav@1230:             if (DEBUG) dependentObservable._latestValue = _latestValue;
jaroslav@1230:         } finally {
jaroslav@1230:             ko.dependencyDetection.end();
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         dependentObservable["notifySubscribers"](_latestValue);
jaroslav@1230:         _isBeingEvaluated = false;
jaroslav@1230:         if (!_subscriptionsToDependencies.length)
jaroslav@1230:             dispose();
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function dependentObservable() {
jaroslav@1230:         if (arguments.length > 0) {
jaroslav@1230:             if (typeof writeFunction === "function") {
jaroslav@1230:                 // Writing a value
jaroslav@1230:                 writeFunction.apply(evaluatorFunctionTarget, arguments);
jaroslav@1230:             } else {
jaroslav@1230:                 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.");
jaroslav@1230:             }
jaroslav@1230:             return this; // Permits chained assignments
jaroslav@1230:         } else {
jaroslav@1230:             // Reading the value
jaroslav@1230:             if (!_hasBeenEvaluated)
jaroslav@1230:                 evaluateImmediate();
jaroslav@1230:             ko.dependencyDetection.registerDependency(dependentObservable);
jaroslav@1230:             return _latestValue;
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function peek() {
jaroslav@1230:         if (!_hasBeenEvaluated)
jaroslav@1230:             evaluateImmediate();
jaroslav@1230:         return _latestValue;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function isActive() {
jaroslav@1230:         return !_hasBeenEvaluated || _subscriptionsToDependencies.length > 0;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     // By here, "options" is always non-null
jaroslav@1230:     var writeFunction = options["write"],
jaroslav@1230:         disposeWhenNodeIsRemoved = options["disposeWhenNodeIsRemoved"] || options.disposeWhenNodeIsRemoved || null,
jaroslav@1230:         disposeWhen = options["disposeWhen"] || options.disposeWhen || function() { return false; },
jaroslav@1230:         dispose = disposeAllSubscriptionsToDependencies,
jaroslav@1230:         _subscriptionsToDependencies = [],
jaroslav@1230:         evaluationTimeoutInstance = null;
jaroslav@1230: 
jaroslav@1230:     if (!evaluatorFunctionTarget)
jaroslav@1230:         evaluatorFunctionTarget = options["owner"];
jaroslav@1230: 
jaroslav@1230:     dependentObservable.peek = peek;
jaroslav@1230:     dependentObservable.getDependenciesCount = function () { return _subscriptionsToDependencies.length; };
jaroslav@1230:     dependentObservable.hasWriteFunction = typeof options["write"] === "function";
jaroslav@1230:     dependentObservable.dispose = function () { dispose(); };
jaroslav@1230:     dependentObservable.isActive = isActive;
jaroslav@1230:     dependentObservable.valueHasMutated = function() {
jaroslav@1230:         _hasBeenEvaluated = false;
jaroslav@1230:         evaluateImmediate();
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.subscribable.call(dependentObservable);
jaroslav@1230:     ko.utils.extend(dependentObservable, ko.dependentObservable['fn']);
jaroslav@1230: 
jaroslav@1230:     ko.exportProperty(dependentObservable, 'peek', dependentObservable.peek);
jaroslav@1230:     ko.exportProperty(dependentObservable, 'dispose', dependentObservable.dispose);
jaroslav@1230:     ko.exportProperty(dependentObservable, 'isActive', dependentObservable.isActive);
jaroslav@1230:     ko.exportProperty(dependentObservable, 'getDependenciesCount', dependentObservable.getDependenciesCount);
jaroslav@1230: 
jaroslav@1230:     // Evaluate, unless deferEvaluation is true
jaroslav@1230:     if (options['deferEvaluation'] !== true)
jaroslav@1230:         evaluateImmediate();
jaroslav@1230: 
jaroslav@1230:     // Build "disposeWhenNodeIsRemoved" and "disposeWhenNodeIsRemovedCallback" option values.
jaroslav@1230:     // But skip if isActive is false (there will never be any dependencies to dispose).
jaroslav@1230:     // (Note: "disposeWhenNodeIsRemoved" option both proactively disposes as soon as the node is removed using ko.removeNode(),
jaroslav@1230:     // plus adds a "disposeWhen" callback that, on each evaluation, disposes if the node was removed by some other means.)
jaroslav@1230:     if (disposeWhenNodeIsRemoved && isActive()) {
jaroslav@1230:         dispose = function() {
jaroslav@1230:             ko.utils.domNodeDisposal.removeDisposeCallback(disposeWhenNodeIsRemoved, arguments.callee);
jaroslav@1230:             disposeAllSubscriptionsToDependencies();
jaroslav@1230:         };
jaroslav@1230:         ko.utils.domNodeDisposal.addDisposeCallback(disposeWhenNodeIsRemoved, dispose);
jaroslav@1230:         var existingDisposeWhenFunction = disposeWhen;
jaroslav@1230:         disposeWhen = function () {
jaroslav@1230:             return !ko.utils.domNodeIsAttachedToDocument(disposeWhenNodeIsRemoved) || existingDisposeWhenFunction();
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     return dependentObservable;
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.isComputed = function(instance) {
jaroslav@1230:     return ko.hasPrototype(instance, ko.dependentObservable);
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: var protoProp = ko.observable.protoProperty; // == "__ko_proto__"
jaroslav@1230: ko.dependentObservable[protoProp] = ko.observable;
jaroslav@1230: 
jaroslav@1230: ko.dependentObservable['fn'] = {};
jaroslav@1230: ko.dependentObservable['fn'][protoProp] = ko.dependentObservable;
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('dependentObservable', ko.dependentObservable);
jaroslav@1230: ko.exportSymbol('computed', ko.dependentObservable); // Make "ko.computed" an alias for "ko.dependentObservable"
jaroslav@1230: ko.exportSymbol('isComputed', ko.isComputed);
jaroslav@1230: 
jaroslav@1230: (function() {
jaroslav@1230:     var maxNestedObservableDepth = 10; // Escape the (unlikely) pathalogical case where an observable's current value is itself (or similar reference cycle)
jaroslav@1230: 
jaroslav@1230:     ko.toJS = function(rootObject) {
jaroslav@1230:         if (arguments.length == 0)
jaroslav@1230:             throw new Error("When calling ko.toJS, pass the object you want to convert.");
jaroslav@1230: 
jaroslav@1230:         // We just unwrap everything at every level in the object graph
jaroslav@1230:         return mapJsObjectGraph(rootObject, function(valueToMap) {
jaroslav@1230:             // Loop because an observable's value might in turn be another observable wrapper
jaroslav@1230:             for (var i = 0; ko.isObservable(valueToMap) && (i < maxNestedObservableDepth); i++)
jaroslav@1230:                 valueToMap = valueToMap();
jaroslav@1230:             return valueToMap;
jaroslav@1230:         });
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.toJSON = function(rootObject, replacer, space) {     // replacer and space are optional
jaroslav@1230:         var plainJavaScriptObject = ko.toJS(rootObject);
jaroslav@1230:         return ko.utils.stringifyJson(plainJavaScriptObject, replacer, space);
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     function mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) {
jaroslav@1230:         visitedObjects = visitedObjects || new objectLookup();
jaroslav@1230: 
jaroslav@1230:         rootObject = mapInputCallback(rootObject);
jaroslav@1230:         var canHaveProperties = (typeof rootObject == "object") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof Date));
jaroslav@1230:         if (!canHaveProperties)
jaroslav@1230:             return rootObject;
jaroslav@1230: 
jaroslav@1230:         var outputProperties = rootObject instanceof Array ? [] : {};
jaroslav@1230:         visitedObjects.save(rootObject, outputProperties);
jaroslav@1230: 
jaroslav@1230:         visitPropertiesOrArrayEntries(rootObject, function(indexer) {
jaroslav@1230:             var propertyValue = mapInputCallback(rootObject[indexer]);
jaroslav@1230: 
jaroslav@1230:             switch (typeof propertyValue) {
jaroslav@1230:                 case "boolean":
jaroslav@1230:                 case "number":
jaroslav@1230:                 case "string":
jaroslav@1230:                 case "function":
jaroslav@1230:                     outputProperties[indexer] = propertyValue;
jaroslav@1230:                     break;
jaroslav@1230:                 case "object":
jaroslav@1230:                 case "undefined":
jaroslav@1230:                     var previouslyMappedValue = visitedObjects.get(propertyValue);
jaroslav@1230:                     outputProperties[indexer] = (previouslyMappedValue !== undefined)
jaroslav@1230:                         ? previouslyMappedValue
jaroslav@1230:                         : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects);
jaroslav@1230:                     break;
jaroslav@1230:             }
jaroslav@1230:         });
jaroslav@1230: 
jaroslav@1230:         return outputProperties;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function visitPropertiesOrArrayEntries(rootObject, visitorCallback) {
jaroslav@1230:         if (rootObject instanceof Array) {
jaroslav@1230:             for (var i = 0; i < rootObject.length; i++)
jaroslav@1230:                 visitorCallback(i);
jaroslav@1230: 
jaroslav@1230:             // For arrays, also respect toJSON property for custom mappings (fixes #278)
jaroslav@1230:             if (typeof rootObject['toJSON'] == 'function')
jaroslav@1230:                 visitorCallback('toJSON');
jaroslav@1230:         } else {
jaroslav@1230:             for (var propertyName in rootObject)
jaroslav@1230:                 visitorCallback(propertyName);
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     function objectLookup() {
jaroslav@1230:         var keys = [];
jaroslav@1230:         var values = [];
jaroslav@1230:         this.save = function(key, value) {
jaroslav@1230:             var existingIndex = ko.utils.arrayIndexOf(keys, key);
jaroslav@1230:             if (existingIndex >= 0)
jaroslav@1230:                 values[existingIndex] = value;
jaroslav@1230:             else {
jaroslav@1230:                 keys.push(key);
jaroslav@1230:                 values.push(value);
jaroslav@1230:             }
jaroslav@1230:         };
jaroslav@1230:         this.get = function(key) {
jaroslav@1230:             var existingIndex = ko.utils.arrayIndexOf(keys, key);
jaroslav@1230:             return (existingIndex >= 0) ? values[existingIndex] : undefined;
jaroslav@1230:         };
jaroslav@1230:     };
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('toJS', ko.toJS);
jaroslav@1230: ko.exportSymbol('toJSON', ko.toJSON);
jaroslav@1230: (function () {
jaroslav@1230:     var hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__';
jaroslav@1230: 
jaroslav@1230:     // Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values
jaroslav@1230:     // are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values
jaroslav@1230:     // that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns.
jaroslav@1230:     ko.selectExtensions = {
jaroslav@1230:         readValue : function(element) {
jaroslav@1230:             switch (ko.utils.tagNameLower(element)) {
jaroslav@1230:                 case 'option':
jaroslav@1230:                     if (element[hasDomDataExpandoProperty] === true)
jaroslav@1230:                         return ko.utils.domData.get(element, ko.bindingHandlers.options.optionValueDomDataKey);
jaroslav@1230:                     return ko.utils.ieVersion <= 7
jaroslav@1230:                         ? (element.getAttributeNode('value').specified ? element.value : element.text)
jaroslav@1230:                         : element.value;
jaroslav@1230:                 case 'select':
jaroslav@1230:                     return element.selectedIndex >= 0 ? ko.selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;
jaroslav@1230:                 default:
jaroslav@1230:                     return element.value;
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         writeValue: function(element, value) {
jaroslav@1230:             switch (ko.utils.tagNameLower(element)) {
jaroslav@1230:                 case 'option':
jaroslav@1230:                     switch(typeof value) {
jaroslav@1230:                         case "string":
jaroslav@1230:                             ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, undefined);
jaroslav@1230:                             if (hasDomDataExpandoProperty in element) { // IE <= 8 throws errors if you delete non-existent properties from a DOM node
jaroslav@1230:                                 delete element[hasDomDataExpandoProperty];
jaroslav@1230:                             }
jaroslav@1230:                             element.value = value;
jaroslav@1230:                             break;
jaroslav@1230:                         default:
jaroslav@1230:                             // Store arbitrary object using DomData
jaroslav@1230:                             ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, value);
jaroslav@1230:                             element[hasDomDataExpandoProperty] = true;
jaroslav@1230: 
jaroslav@1230:                             // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value.
jaroslav@1230:                             element.value = typeof value === "number" ? value : "";
jaroslav@1230:                             break;
jaroslav@1230:                     }
jaroslav@1230:                     break;
jaroslav@1230:                 case 'select':
jaroslav@1230:                     for (var i = element.options.length - 1; i >= 0; i--) {
jaroslav@1230:                         if (ko.selectExtensions.readValue(element.options[i]) == value) {
jaroslav@1230:                             element.selectedIndex = i;
jaroslav@1230:                             break;
jaroslav@1230:                         }
jaroslav@1230:                     }
jaroslav@1230:                     break;
jaroslav@1230:                 default:
jaroslav@1230:                     if ((value === null) || (value === undefined))
jaroslav@1230:                         value = "";
jaroslav@1230:                     element.value = value;
jaroslav@1230:                     break;
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('selectExtensions', ko.selectExtensions);
jaroslav@1230: ko.exportSymbol('selectExtensions.readValue', ko.selectExtensions.readValue);
jaroslav@1230: ko.exportSymbol('selectExtensions.writeValue', ko.selectExtensions.writeValue);
jaroslav@1230: ko.expressionRewriting = (function () {
jaroslav@1230:     var restoreCapturedTokensRegex = /\@ko_token_(\d+)\@/g;
jaroslav@1230:     var javaScriptReservedWords = ["true", "false"];
jaroslav@1230: 
jaroslav@1230:     // Matches something that can be assigned to--either an isolated identifier or something ending with a property accessor
jaroslav@1230:     // This is designed to be simple and avoid false negatives, but could produce false positives (e.g., a+b.c).
jaroslav@1230:     var javaScriptAssignmentTarget = /^(?:[$_a-z][$\w]*|(.+)(\.\s*[$_a-z][$\w]*|\[.+\]))$/i;
jaroslav@1230: 
jaroslav@1230:     function restoreTokens(string, tokens) {
jaroslav@1230:         var prevValue = null;
jaroslav@1230:         while (string != prevValue) { // Keep restoring tokens until it no longer makes a difference (they may be nested)
jaroslav@1230:             prevValue = string;
jaroslav@1230:             string = string.replace(restoreCapturedTokensRegex, function (match, tokenIndex) {
jaroslav@1230:                 return tokens[tokenIndex];
jaroslav@1230:             });
jaroslav@1230:         }
jaroslav@1230:         return string;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function getWriteableValue(expression) {
jaroslav@1230:         if (ko.utils.arrayIndexOf(javaScriptReservedWords, ko.utils.stringTrim(expression).toLowerCase()) >= 0)
jaroslav@1230:             return false;
jaroslav@1230:         var match = expression.match(javaScriptAssignmentTarget);
jaroslav@1230:         return match === null ? false : match[1] ? ('Object(' + match[1] + ')' + match[2]) : expression;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function ensureQuoted(key) {
jaroslav@1230:         var trimmedKey = ko.utils.stringTrim(key);
jaroslav@1230:         switch (trimmedKey.length && trimmedKey.charAt(0)) {
jaroslav@1230:             case "'":
jaroslav@1230:             case '"':
jaroslav@1230:                 return key;
jaroslav@1230:             default:
jaroslav@1230:                 return "'" + trimmedKey + "'";
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     return {
jaroslav@1230:         bindingRewriteValidators: [],
jaroslav@1230: 
jaroslav@1230:         parseObjectLiteral: function(objectLiteralString) {
jaroslav@1230:             // A full tokeniser+lexer would add too much weight to this library, so here's a simple parser
jaroslav@1230:             // that is sufficient just to split an object literal string into a set of top-level key-value pairs
jaroslav@1230: 
jaroslav@1230:             var str = ko.utils.stringTrim(objectLiteralString);
jaroslav@1230:             if (str.length < 3)
jaroslav@1230:                 return [];
jaroslav@1230:             if (str.charAt(0) === "{")// Ignore any braces surrounding the whole object literal
jaroslav@1230:                 str = str.substring(1, str.length - 1);
jaroslav@1230: 
jaroslav@1230:             // Pull out any string literals and regex literals
jaroslav@1230:             var tokens = [];
jaroslav@1230:             var tokenStart = null, tokenEndChar;
jaroslav@1230:             for (var position = 0; position < str.length; position++) {
jaroslav@1230:                 var c = str.charAt(position);
jaroslav@1230:                 if (tokenStart === null) {
jaroslav@1230:                     switch (c) {
jaroslav@1230:                         case '"':
jaroslav@1230:                         case "'":
jaroslav@1230:                         case "/":
jaroslav@1230:                             tokenStart = position;
jaroslav@1230:                             tokenEndChar = c;
jaroslav@1230:                             break;
jaroslav@1230:                     }
jaroslav@1230:                 } else if ((c == tokenEndChar) && (str.charAt(position - 1) !== "\\")) {
jaroslav@1230:                     var token = str.substring(tokenStart, position + 1);
jaroslav@1230:                     tokens.push(token);
jaroslav@1230:                     var replacement = "@ko_token_" + (tokens.length - 1) + "@";
jaroslav@1230:                     str = str.substring(0, tokenStart) + replacement + str.substring(position + 1);
jaroslav@1230:                     position -= (token.length - replacement.length);
jaroslav@1230:                     tokenStart = null;
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             // Next pull out balanced paren, brace, and bracket blocks
jaroslav@1230:             tokenStart = null;
jaroslav@1230:             tokenEndChar = null;
jaroslav@1230:             var tokenDepth = 0, tokenStartChar = null;
jaroslav@1230:             for (var position = 0; position < str.length; position++) {
jaroslav@1230:                 var c = str.charAt(position);
jaroslav@1230:                 if (tokenStart === null) {
jaroslav@1230:                     switch (c) {
jaroslav@1230:                         case "{": tokenStart = position; tokenStartChar = c;
jaroslav@1230:                                   tokenEndChar = "}";
jaroslav@1230:                                   break;
jaroslav@1230:                         case "(": tokenStart = position; tokenStartChar = c;
jaroslav@1230:                                   tokenEndChar = ")";
jaroslav@1230:                                   break;
jaroslav@1230:                         case "[": tokenStart = position; tokenStartChar = c;
jaroslav@1230:                                   tokenEndChar = "]";
jaroslav@1230:                                   break;
jaroslav@1230:                     }
jaroslav@1230:                 }
jaroslav@1230: 
jaroslav@1230:                 if (c === tokenStartChar)
jaroslav@1230:                     tokenDepth++;
jaroslav@1230:                 else if (c === tokenEndChar) {
jaroslav@1230:                     tokenDepth--;
jaroslav@1230:                     if (tokenDepth === 0) {
jaroslav@1230:                         var token = str.substring(tokenStart, position + 1);
jaroslav@1230:                         tokens.push(token);
jaroslav@1230:                         var replacement = "@ko_token_" + (tokens.length - 1) + "@";
jaroslav@1230:                         str = str.substring(0, tokenStart) + replacement + str.substring(position + 1);
jaroslav@1230:                         position -= (token.length - replacement.length);
jaroslav@1230:                         tokenStart = null;
jaroslav@1230:                     }
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             // Now we can safely split on commas to get the key/value pairs
jaroslav@1230:             var result = [];
jaroslav@1230:             var keyValuePairs = str.split(",");
jaroslav@1230:             for (var i = 0, j = keyValuePairs.length; i < j; i++) {
jaroslav@1230:                 var pair = keyValuePairs[i];
jaroslav@1230:                 var colonPos = pair.indexOf(":");
jaroslav@1230:                 if ((colonPos > 0) && (colonPos < pair.length - 1)) {
jaroslav@1230:                     var key = pair.substring(0, colonPos);
jaroslav@1230:                     var value = pair.substring(colonPos + 1);
jaroslav@1230:                     result.push({ 'key': restoreTokens(key, tokens), 'value': restoreTokens(value, tokens) });
jaroslav@1230:                 } else {
jaroslav@1230:                     result.push({ 'unknown': restoreTokens(pair, tokens) });
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230:             return result;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         preProcessBindings: function (objectLiteralStringOrKeyValueArray) {
jaroslav@1230:             var keyValueArray = typeof objectLiteralStringOrKeyValueArray === "string"
jaroslav@1230:                 ? ko.expressionRewriting.parseObjectLiteral(objectLiteralStringOrKeyValueArray)
jaroslav@1230:                 : objectLiteralStringOrKeyValueArray;
jaroslav@1230:             var resultStrings = [], propertyAccessorResultStrings = [];
jaroslav@1230: 
jaroslav@1230:             var keyValueEntry;
jaroslav@1230:             for (var i = 0; keyValueEntry = keyValueArray[i]; i++) {
jaroslav@1230:                 if (resultStrings.length > 0)
jaroslav@1230:                     resultStrings.push(",");
jaroslav@1230: 
jaroslav@1230:                 if (keyValueEntry['key']) {
jaroslav@1230:                     var quotedKey = ensureQuoted(keyValueEntry['key']), val = keyValueEntry['value'];
jaroslav@1230:                     resultStrings.push(quotedKey);
jaroslav@1230:                     resultStrings.push(":");
jaroslav@1230:                     resultStrings.push(val);
jaroslav@1230: 
jaroslav@1230:                     if (val = getWriteableValue(ko.utils.stringTrim(val))) {
jaroslav@1230:                         if (propertyAccessorResultStrings.length > 0)
jaroslav@1230:                             propertyAccessorResultStrings.push(", ");
jaroslav@1230:                         propertyAccessorResultStrings.push(quotedKey + " : function(__ko_value) { " + val + " = __ko_value; }");
jaroslav@1230:                     }
jaroslav@1230:                 } else if (keyValueEntry['unknown']) {
jaroslav@1230:                     resultStrings.push(keyValueEntry['unknown']);
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             var combinedResult = resultStrings.join("");
jaroslav@1230:             if (propertyAccessorResultStrings.length > 0) {
jaroslav@1230:                 var allPropertyAccessors = propertyAccessorResultStrings.join("");
jaroslav@1230:                 combinedResult = combinedResult + ", '_ko_property_writers' : { " + allPropertyAccessors + " } ";
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             return combinedResult;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         keyValueArrayContainsKey: function(keyValueArray, key) {
jaroslav@1230:             for (var i = 0; i < keyValueArray.length; i++)
jaroslav@1230:                 if (ko.utils.stringTrim(keyValueArray[i]['key']) == key)
jaroslav@1230:                     return true;
jaroslav@1230:             return false;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         // Internal, private KO utility for updating model properties from within bindings
jaroslav@1230:         // property:            If the property being updated is (or might be) an observable, pass it here
jaroslav@1230:         //                      If it turns out to be a writable observable, it will be written to directly
jaroslav@1230:         // allBindingsAccessor: All bindings in the current execution context.
jaroslav@1230:         //                      This will be searched for a '_ko_property_writers' property in case you're writing to a non-observable
jaroslav@1230:         // key:                 The key identifying the property to be written. Example: for { hasFocus: myValue }, write to 'myValue' by specifying the key 'hasFocus'
jaroslav@1230:         // value:               The value to be written
jaroslav@1230:         // checkIfDifferent:    If true, and if the property being written is a writable observable, the value will only be written if
jaroslav@1230:         //                      it is !== existing value on that writable observable
jaroslav@1230:         writeValueToProperty: function(property, allBindingsAccessor, key, value, checkIfDifferent) {
jaroslav@1230:             if (!property || !ko.isWriteableObservable(property)) {
jaroslav@1230:                 var propWriters = allBindingsAccessor()['_ko_property_writers'];
jaroslav@1230:                 if (propWriters && propWriters[key])
jaroslav@1230:                     propWriters[key](value);
jaroslav@1230:             } else if (!checkIfDifferent || property.peek() !== value) {
jaroslav@1230:                 property(value);
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('expressionRewriting', ko.expressionRewriting);
jaroslav@1230: ko.exportSymbol('expressionRewriting.bindingRewriteValidators', ko.expressionRewriting.bindingRewriteValidators);
jaroslav@1230: ko.exportSymbol('expressionRewriting.parseObjectLiteral', ko.expressionRewriting.parseObjectLiteral);
jaroslav@1230: ko.exportSymbol('expressionRewriting.preProcessBindings', ko.expressionRewriting.preProcessBindings);
jaroslav@1230: 
jaroslav@1230: // For backward compatibility, define the following aliases. (Previously, these function names were misleading because
jaroslav@1230: // they referred to JSON specifically, even though they actually work with arbitrary JavaScript object literal expressions.)
jaroslav@1230: ko.exportSymbol('jsonExpressionRewriting', ko.expressionRewriting);
jaroslav@1230: ko.exportSymbol('jsonExpressionRewriting.insertPropertyAccessorsIntoJson', ko.expressionRewriting.preProcessBindings);(function() {
jaroslav@1230:     // "Virtual elements" is an abstraction on top of the usual DOM API which understands the notion that comment nodes
jaroslav@1230:     // may be used to represent hierarchy (in addition to the DOM's natural hierarchy).
jaroslav@1230:     // If you call the DOM-manipulating functions on ko.virtualElements, you will be able to read and write the state
jaroslav@1230:     // of that virtual hierarchy
jaroslav@1230:     //
jaroslav@1230:     // The point of all this is to support containerless templates (e.g., <!-- ko foreach:someCollection -->blah<!-- /ko -->)
jaroslav@1230:     // without having to scatter special cases all over the binding and templating code.
jaroslav@1230: 
jaroslav@1230:     // IE 9 cannot reliably read the "nodeValue" property of a comment node (see https://github.com/SteveSanderson/knockout/issues/186)
jaroslav@1230:     // but it does give them a nonstandard alternative property called "text" that it can read reliably. Other browsers don't have that property.
jaroslav@1230:     // So, use node.text where available, and node.nodeValue elsewhere
jaroslav@1230:     var commentNodesHaveTextProperty = document.createComment("test").text === "<!--test-->";
jaroslav@1230: 
jaroslav@1230:     var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*ko(?:\s+(.+\s*\:[\s\S]*))?\s*-->$/ : /^\s*ko(?:\s+(.+\s*\:[\s\S]*))?\s*$/;
jaroslav@1230:     var endCommentRegex =   commentNodesHaveTextProperty ? /^<!--\s*\/ko\s*-->$/ : /^\s*\/ko\s*$/;
jaroslav@1230:     var htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };
jaroslav@1230: 
jaroslav@1230:     function isStartComment(node) {
jaroslav@1230:         return (node.nodeType == 8) && (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex);
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function isEndComment(node) {
jaroslav@1230:         return (node.nodeType == 8) && (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(endCommentRegex);
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function getVirtualChildren(startComment, allowUnbalanced) {
jaroslav@1230:         var currentNode = startComment;
jaroslav@1230:         var depth = 1;
jaroslav@1230:         var children = [];
jaroslav@1230:         while (currentNode = currentNode.nextSibling) {
jaroslav@1230:             if (isEndComment(currentNode)) {
jaroslav@1230:                 depth--;
jaroslav@1230:                 if (depth === 0)
jaroslav@1230:                     return children;
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             children.push(currentNode);
jaroslav@1230: 
jaroslav@1230:             if (isStartComment(currentNode))
jaroslav@1230:                 depth++;
jaroslav@1230:         }
jaroslav@1230:         if (!allowUnbalanced)
jaroslav@1230:             throw new Error("Cannot find closing comment tag to match: " + startComment.nodeValue);
jaroslav@1230:         return null;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function getMatchingEndComment(startComment, allowUnbalanced) {
jaroslav@1230:         var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);
jaroslav@1230:         if (allVirtualChildren) {
jaroslav@1230:             if (allVirtualChildren.length > 0)
jaroslav@1230:                 return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;
jaroslav@1230:             return startComment.nextSibling;
jaroslav@1230:         } else
jaroslav@1230:             return null; // Must have no matching end comment, and allowUnbalanced is true
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function getUnbalancedChildTags(node) {
jaroslav@1230:         // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>
jaroslav@1230:         //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->
jaroslav@1230:         var childNode = node.firstChild, captureRemaining = null;
jaroslav@1230:         if (childNode) {
jaroslav@1230:             do {
jaroslav@1230:                 if (captureRemaining)                   // We already hit an unbalanced node and are now just scooping up all subsequent nodes
jaroslav@1230:                     captureRemaining.push(childNode);
jaroslav@1230:                 else if (isStartComment(childNode)) {
jaroslav@1230:                     var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);
jaroslav@1230:                     if (matchingEndComment)             // It's a balanced tag, so skip immediately to the end of this virtual set
jaroslav@1230:                         childNode = matchingEndComment;
jaroslav@1230:                     else
jaroslav@1230:                         captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point
jaroslav@1230:                 } else if (isEndComment(childNode)) {
jaroslav@1230:                     captureRemaining = [childNode];     // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing
jaroslav@1230:                 }
jaroslav@1230:             } while (childNode = childNode.nextSibling);
jaroslav@1230:         }
jaroslav@1230:         return captureRemaining;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     ko.virtualElements = {
jaroslav@1230:         allowedBindings: {},
jaroslav@1230: 
jaroslav@1230:         childNodes: function(node) {
jaroslav@1230:             return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         emptyNode: function(node) {
jaroslav@1230:             if (!isStartComment(node))
jaroslav@1230:                 ko.utils.emptyDomNode(node);
jaroslav@1230:             else {
jaroslav@1230:                 var virtualChildren = ko.virtualElements.childNodes(node);
jaroslav@1230:                 for (var i = 0, j = virtualChildren.length; i < j; i++)
jaroslav@1230:                     ko.removeNode(virtualChildren[i]);
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         setDomNodeChildren: function(node, childNodes) {
jaroslav@1230:             if (!isStartComment(node))
jaroslav@1230:                 ko.utils.setDomNodeChildren(node, childNodes);
jaroslav@1230:             else {
jaroslav@1230:                 ko.virtualElements.emptyNode(node);
jaroslav@1230:                 var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children
jaroslav@1230:                 for (var i = 0, j = childNodes.length; i < j; i++)
jaroslav@1230:                     endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         prepend: function(containerNode, nodeToPrepend) {
jaroslav@1230:             if (!isStartComment(containerNode)) {
jaroslav@1230:                 if (containerNode.firstChild)
jaroslav@1230:                     containerNode.insertBefore(nodeToPrepend, containerNode.firstChild);
jaroslav@1230:                 else
jaroslav@1230:                     containerNode.appendChild(nodeToPrepend);
jaroslav@1230:             } else {
jaroslav@1230:                 // Start comments must always have a parent and at least one following sibling (the end comment)
jaroslav@1230:                 containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling);
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         insertAfter: function(containerNode, nodeToInsert, insertAfterNode) {
jaroslav@1230:             if (!insertAfterNode) {
jaroslav@1230:                 ko.virtualElements.prepend(containerNode, nodeToInsert);
jaroslav@1230:             } else if (!isStartComment(containerNode)) {
jaroslav@1230:                 // Insert after insertion point
jaroslav@1230:                 if (insertAfterNode.nextSibling)
jaroslav@1230:                     containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
jaroslav@1230:                 else
jaroslav@1230:                     containerNode.appendChild(nodeToInsert);
jaroslav@1230:             } else {
jaroslav@1230:                 // Children of start comments must always have a parent and at least one following sibling (the end comment)
jaroslav@1230:                 containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         firstChild: function(node) {
jaroslav@1230:             if (!isStartComment(node))
jaroslav@1230:                 return node.firstChild;
jaroslav@1230:             if (!node.nextSibling || isEndComment(node.nextSibling))
jaroslav@1230:                 return null;
jaroslav@1230:             return node.nextSibling;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         nextSibling: function(node) {
jaroslav@1230:             if (isStartComment(node))
jaroslav@1230:                 node = getMatchingEndComment(node);
jaroslav@1230:             if (node.nextSibling && isEndComment(node.nextSibling))
jaroslav@1230:                 return null;
jaroslav@1230:             return node.nextSibling;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         virtualNodeBindingValue: function(node) {
jaroslav@1230:             var regexMatch = isStartComment(node);
jaroslav@1230:             return regexMatch ? regexMatch[1] : null;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         normaliseVirtualElementDomStructure: function(elementVerified) {
jaroslav@1230:             // Workaround for https://github.com/SteveSanderson/knockout/issues/155
jaroslav@1230:             // (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
jaroslav@1230:             // that are direct descendants of <ul> into the preceding <li>)
jaroslav@1230:             if (!htmlTagsWithOptionallyClosingChildren[ko.utils.tagNameLower(elementVerified)])
jaroslav@1230:                 return;
jaroslav@1230: 
jaroslav@1230:             // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags
jaroslav@1230:             // must be intended to appear *after* that child, so move them there.
jaroslav@1230:             var childNode = elementVerified.firstChild;
jaroslav@1230:             if (childNode) {
jaroslav@1230:                 do {
jaroslav@1230:                     if (childNode.nodeType === 1) {
jaroslav@1230:                         var unbalancedTags = getUnbalancedChildTags(childNode);
jaroslav@1230:                         if (unbalancedTags) {
jaroslav@1230:                             // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child
jaroslav@1230:                             var nodeToInsertBefore = childNode.nextSibling;
jaroslav@1230:                             for (var i = 0; i < unbalancedTags.length; i++) {
jaroslav@1230:                                 if (nodeToInsertBefore)
jaroslav@1230:                                     elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);
jaroslav@1230:                                 else
jaroslav@1230:                                     elementVerified.appendChild(unbalancedTags[i]);
jaroslav@1230:                             }
jaroslav@1230:                         }
jaroslav@1230:                     }
jaroslav@1230:                 } while (childNode = childNode.nextSibling);
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: })();
jaroslav@1230: ko.exportSymbol('virtualElements', ko.virtualElements);
jaroslav@1230: ko.exportSymbol('virtualElements.allowedBindings', ko.virtualElements.allowedBindings);
jaroslav@1230: ko.exportSymbol('virtualElements.emptyNode', ko.virtualElements.emptyNode);
jaroslav@1230: //ko.exportSymbol('virtualElements.firstChild', ko.virtualElements.firstChild);     // firstChild is not minified
jaroslav@1230: ko.exportSymbol('virtualElements.insertAfter', ko.virtualElements.insertAfter);
jaroslav@1230: //ko.exportSymbol('virtualElements.nextSibling', ko.virtualElements.nextSibling);   // nextSibling is not minified
jaroslav@1230: ko.exportSymbol('virtualElements.prepend', ko.virtualElements.prepend);
jaroslav@1230: ko.exportSymbol('virtualElements.setDomNodeChildren', ko.virtualElements.setDomNodeChildren);
jaroslav@1230: (function() {
jaroslav@1230:     var defaultBindingAttributeName = "data-bind";
jaroslav@1230: 
jaroslav@1230:     ko.bindingProvider = function() {
jaroslav@1230:         this.bindingCache = {};
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.utils.extend(ko.bindingProvider.prototype, {
jaroslav@1230:         'nodeHasBindings': function(node) {
jaroslav@1230:             switch (node.nodeType) {
jaroslav@1230:                 case 1: return node.getAttribute(defaultBindingAttributeName) != null;   // Element
jaroslav@1230:                 case 8: return ko.virtualElements.virtualNodeBindingValue(node) != null; // Comment node
jaroslav@1230:                 default: return false;
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         'getBindings': function(node, bindingContext) {
jaroslav@1230:             var bindingsString = this['getBindingsString'](node, bindingContext);
jaroslav@1230:             return bindingsString ? this['parseBindingsString'](bindingsString, bindingContext, node) : null;
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         // The following function is only used internally by this default provider.
jaroslav@1230:         // It's not part of the interface definition for a general binding provider.
jaroslav@1230:         'getBindingsString': function(node, bindingContext) {
jaroslav@1230:             switch (node.nodeType) {
jaroslav@1230:                 case 1: return node.getAttribute(defaultBindingAttributeName);   // Element
jaroslav@1230:                 case 8: return ko.virtualElements.virtualNodeBindingValue(node); // Comment node
jaroslav@1230:                 default: return null;
jaroslav@1230:             }
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         // The following function is only used internally by this default provider.
jaroslav@1230:         // It's not part of the interface definition for a general binding provider.
jaroslav@1230:         'parseBindingsString': function(bindingsString, bindingContext, node) {
jaroslav@1230:             try {
jaroslav@1230:                 var bindingFunction = createBindingsStringEvaluatorViaCache(bindingsString, this.bindingCache);
jaroslav@1230:                 return bindingFunction(bindingContext, node);
jaroslav@1230:             } catch (ex) {
jaroslav@1230:                 throw new Error("Unable to parse bindings.\nMessage: " + ex + ";\nBindings value: " + bindingsString);
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:     });
jaroslav@1230: 
jaroslav@1230:     ko.bindingProvider['instance'] = new ko.bindingProvider();
jaroslav@1230: 
jaroslav@1230:     function createBindingsStringEvaluatorViaCache(bindingsString, cache) {
jaroslav@1230:         var cacheKey = bindingsString;
jaroslav@1230:         return cache[cacheKey]
jaroslav@1230:             || (cache[cacheKey] = createBindingsStringEvaluator(bindingsString));
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function createBindingsStringEvaluator(bindingsString) {
jaroslav@1230:         // Build the source for a function that evaluates "expression"
jaroslav@1230:         // For each scope variable, add an extra level of "with" nesting
jaroslav@1230:         // Example result: with(sc1) { with(sc0) { return (expression) } }
jaroslav@1230:         var rewrittenBindings = ko.expressionRewriting.preProcessBindings(bindingsString),
jaroslav@1230:             functionBody = "with($context){with($data||{}){return{" + rewrittenBindings + "}}}";
jaroslav@1230:         return new Function("$context", "$element", functionBody);
jaroslav@1230:     }
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('bindingProvider', ko.bindingProvider);
jaroslav@1230: (function () {
jaroslav@1230:     ko.bindingHandlers = {};
jaroslav@1230: 
jaroslav@1230:     ko.bindingContext = function(dataItem, parentBindingContext, dataItemAlias) {
jaroslav@1230:         if (parentBindingContext) {
jaroslav@1230:             ko.utils.extend(this, parentBindingContext); // Inherit $root and any custom properties
jaroslav@1230:             this['$parentContext'] = parentBindingContext;
jaroslav@1230:             this['$parent'] = parentBindingContext['$data'];
jaroslav@1230:             this['$parents'] = (parentBindingContext['$parents'] || []).slice(0);
jaroslav@1230:             this['$parents'].unshift(this['$parent']);
jaroslav@1230:         } else {
jaroslav@1230:             this['$parents'] = [];
jaroslav@1230:             this['$root'] = dataItem;
jaroslav@1230:             // Export 'ko' in the binding context so it will be available in bindings and templates
jaroslav@1230:             // even if 'ko' isn't exported as a global, such as when using an AMD loader.
jaroslav@1230:             // See https://github.com/SteveSanderson/knockout/issues/490
jaroslav@1230:             this['ko'] = ko;
jaroslav@1230:         }
jaroslav@1230:         this['$data'] = dataItem;
jaroslav@1230:         if (dataItemAlias)
jaroslav@1230:             this[dataItemAlias] = dataItem;
jaroslav@1230:     }
jaroslav@1230:     ko.bindingContext.prototype['createChildContext'] = function (dataItem, dataItemAlias) {
jaroslav@1230:         return new ko.bindingContext(dataItem, this, dataItemAlias);
jaroslav@1230:     };
jaroslav@1230:     ko.bindingContext.prototype['extend'] = function(properties) {
jaroslav@1230:         var clone = ko.utils.extend(new ko.bindingContext(), this);
jaroslav@1230:         return ko.utils.extend(clone, properties);
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     function validateThatBindingIsAllowedForVirtualElements(bindingName) {
jaroslav@1230:         var validator = ko.virtualElements.allowedBindings[bindingName];
jaroslav@1230:         if (!validator)
jaroslav@1230:             throw new Error("The binding '" + bindingName + "' cannot be used with virtual elements")
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function applyBindingsToDescendantsInternal (viewModel, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement) {
jaroslav@1230:         var currentChild, nextInQueue = ko.virtualElements.firstChild(elementOrVirtualElement);
jaroslav@1230:         while (currentChild = nextInQueue) {
jaroslav@1230:             // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position
jaroslav@1230:             nextInQueue = ko.virtualElements.nextSibling(currentChild);
jaroslav@1230:             applyBindingsToNodeAndDescendantsInternal(viewModel, currentChild, bindingContextsMayDifferFromDomParentElement);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function applyBindingsToNodeAndDescendantsInternal (viewModel, nodeVerified, bindingContextMayDifferFromDomParentElement) {
jaroslav@1230:         var shouldBindDescendants = true;
jaroslav@1230: 
jaroslav@1230:         // Perf optimisation: Apply bindings only if...
jaroslav@1230:         // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context)
jaroslav@1230:         //     Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those
jaroslav@1230:         // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)
jaroslav@1230:         var isElement = (nodeVerified.nodeType === 1);
jaroslav@1230:         if (isElement) // Workaround IE <= 8 HTML parsing weirdness
jaroslav@1230:             ko.virtualElements.normaliseVirtualElementDomStructure(nodeVerified);
jaroslav@1230: 
jaroslav@1230:         var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement)             // Case (1)
jaroslav@1230:                                || ko.bindingProvider['instance']['nodeHasBindings'](nodeVerified);       // Case (2)
jaroslav@1230:         if (shouldApplyBindings)
jaroslav@1230:             shouldBindDescendants = applyBindingsToNodeInternal(nodeVerified, null, viewModel, bindingContextMayDifferFromDomParentElement).shouldBindDescendants;
jaroslav@1230: 
jaroslav@1230:         if (shouldBindDescendants) {
jaroslav@1230:             // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So,
jaroslav@1230:             //  * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode,
jaroslav@1230:             //    hence bindingContextsMayDifferFromDomParentElement is false
jaroslav@1230:             //  * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may
jaroslav@1230:             //    skip over any number of intermediate virtual elements, any of which might define a custom binding context,
jaroslav@1230:             //    hence bindingContextsMayDifferFromDomParentElement is true
jaroslav@1230:             applyBindingsToDescendantsInternal(viewModel, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function applyBindingsToNodeInternal (node, bindings, viewModelOrBindingContext, bindingContextMayDifferFromDomParentElement) {
jaroslav@1230:         // Need to be sure that inits are only run once, and updates never run until all the inits have been run
jaroslav@1230:         var initPhase = 0; // 0 = before all inits, 1 = during inits, 2 = after all inits
jaroslav@1230: 
jaroslav@1230:         // Each time the dependentObservable is evaluated (after data changes),
jaroslav@1230:         // the binding attribute is reparsed so that it can pick out the correct
jaroslav@1230:         // model properties in the context of the changed data.
jaroslav@1230:         // DOM event callbacks need to be able to access this changed data,
jaroslav@1230:         // so we need a single parsedBindings variable (shared by all callbacks
jaroslav@1230:         // associated with this node's bindings) that all the closures can access.
jaroslav@1230:         var parsedBindings;
jaroslav@1230:         function makeValueAccessor(bindingKey) {
jaroslav@1230:             return function () { return parsedBindings[bindingKey] }
jaroslav@1230:         }
jaroslav@1230:         function parsedBindingsAccessor() {
jaroslav@1230:             return parsedBindings;
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         var bindingHandlerThatControlsDescendantBindings;
jaroslav@1230:         ko.dependentObservable(
jaroslav@1230:             function () {
jaroslav@1230:                 // Ensure we have a nonnull binding context to work with
jaroslav@1230:                 var bindingContextInstance = viewModelOrBindingContext && (viewModelOrBindingContext instanceof ko.bindingContext)
jaroslav@1230:                     ? viewModelOrBindingContext
jaroslav@1230:                     : new ko.bindingContext(ko.utils.unwrapObservable(viewModelOrBindingContext));
jaroslav@1230:                 var viewModel = bindingContextInstance['$data'];
jaroslav@1230: 
jaroslav@1230:                 // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because
jaroslav@1230:                 // we can easily recover it just by scanning up the node's ancestors in the DOM
jaroslav@1230:                 // (note: here, parent node means "real DOM parent" not "virtual parent", as there's no O(1) way to find the virtual parent)
jaroslav@1230:                 if (bindingContextMayDifferFromDomParentElement)
jaroslav@1230:                     ko.storedBindingContextForNode(node, bindingContextInstance);
jaroslav@1230: 
jaroslav@1230:                 // Use evaluatedBindings if given, otherwise fall back on asking the bindings provider to give us some bindings
jaroslav@1230:                 var evaluatedBindings = (typeof bindings == "function") ? bindings(bindingContextInstance, node) : bindings;
jaroslav@1230:                 parsedBindings = evaluatedBindings || ko.bindingProvider['instance']['getBindings'](node, bindingContextInstance);
jaroslav@1230: 
jaroslav@1230:                 if (parsedBindings) {
jaroslav@1230:                     // First run all the inits, so bindings can register for notification on changes
jaroslav@1230:                     if (initPhase === 0) {
jaroslav@1230:                         initPhase = 1;
jaroslav@1230:                         for (var bindingKey in parsedBindings) {
jaroslav@1230:                             var binding = ko.bindingHandlers[bindingKey];
jaroslav@1230:                             if (binding && node.nodeType === 8)
jaroslav@1230:                                 validateThatBindingIsAllowedForVirtualElements(bindingKey);
jaroslav@1230: 
jaroslav@1230:                             if (binding && typeof binding["init"] == "function") {
jaroslav@1230:                                 var handlerInitFn = binding["init"];
jaroslav@1230:                                 var initResult = handlerInitFn(node, makeValueAccessor(bindingKey), parsedBindingsAccessor, viewModel, bindingContextInstance);
jaroslav@1230: 
jaroslav@1230:                                 // If this binding handler claims to control descendant bindings, make a note of this
jaroslav@1230:                                 if (initResult && initResult['controlsDescendantBindings']) {
jaroslav@1230:                                     if (bindingHandlerThatControlsDescendantBindings !== undefined)
jaroslav@1230:                                         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.");
jaroslav@1230:                                     bindingHandlerThatControlsDescendantBindings = bindingKey;
jaroslav@1230:                                 }
jaroslav@1230:                             }
jaroslav@1230:                         }
jaroslav@1230:                         initPhase = 2;
jaroslav@1230:                     }
jaroslav@1230: 
jaroslav@1230:                     // ... then run all the updates, which might trigger changes even on the first evaluation
jaroslav@1230:                     if (initPhase === 2) {
jaroslav@1230:                         for (var bindingKey in parsedBindings) {
jaroslav@1230:                             var binding = ko.bindingHandlers[bindingKey];
jaroslav@1230:                             if (binding && typeof binding["update"] == "function") {
jaroslav@1230:                                 var handlerUpdateFn = binding["update"];
jaroslav@1230:                                 handlerUpdateFn(node, makeValueAccessor(bindingKey), parsedBindingsAccessor, viewModel, bindingContextInstance);
jaroslav@1230:                             }
jaroslav@1230:                         }
jaroslav@1230:                     }
jaroslav@1230:                 }
jaroslav@1230:             },
jaroslav@1230:             null,
jaroslav@1230:             { disposeWhenNodeIsRemoved : node }
jaroslav@1230:         );
jaroslav@1230: 
jaroslav@1230:         return {
jaroslav@1230:             shouldBindDescendants: bindingHandlerThatControlsDescendantBindings === undefined
jaroslav@1230:         };
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     var storedBindingContextDomDataKey = "__ko_bindingContext__";
jaroslav@1230:     ko.storedBindingContextForNode = function (node, bindingContext) {
jaroslav@1230:         if (arguments.length == 2)
jaroslav@1230:             ko.utils.domData.set(node, storedBindingContextDomDataKey, bindingContext);
jaroslav@1230:         else
jaroslav@1230:             return ko.utils.domData.get(node, storedBindingContextDomDataKey);
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     ko.applyBindingsToNode = function (node, bindings, viewModel) {
jaroslav@1230:         if (node.nodeType === 1) // If it's an element, workaround IE <= 8 HTML parsing weirdness
jaroslav@1230:             ko.virtualElements.normaliseVirtualElementDomStructure(node);
jaroslav@1230:         return applyBindingsToNodeInternal(node, bindings, viewModel, true);
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.applyBindingsToDescendants = function(viewModel, rootNode) {
jaroslav@1230:         if (rootNode.nodeType === 1 || rootNode.nodeType === 8)
jaroslav@1230:             applyBindingsToDescendantsInternal(viewModel, rootNode, true);
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.applyBindings = function (viewModel, rootNode) {
jaroslav@1230:         if (rootNode && (rootNode.nodeType !== 1) && (rootNode.nodeType !== 8))
jaroslav@1230:             throw new Error("ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node");
jaroslav@1230:         rootNode = rootNode || window.document.body; // Make "rootNode" parameter optional
jaroslav@1230: 
jaroslav@1230:         applyBindingsToNodeAndDescendantsInternal(viewModel, rootNode, true);
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     // Retrieving binding context from arbitrary nodes
jaroslav@1230:     ko.contextFor = function(node) {
jaroslav@1230:         // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them)
jaroslav@1230:         switch (node.nodeType) {
jaroslav@1230:             case 1:
jaroslav@1230:             case 8:
jaroslav@1230:                 var context = ko.storedBindingContextForNode(node);
jaroslav@1230:                 if (context) return context;
jaroslav@1230:                 if (node.parentNode) return ko.contextFor(node.parentNode);
jaroslav@1230:                 break;
jaroslav@1230:         }
jaroslav@1230:         return undefined;
jaroslav@1230:     };
jaroslav@1230:     ko.dataFor = function(node) {
jaroslav@1230:         var context = ko.contextFor(node);
jaroslav@1230:         return context ? context['$data'] : undefined;
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.exportSymbol('bindingHandlers', ko.bindingHandlers);
jaroslav@1230:     ko.exportSymbol('applyBindings', ko.applyBindings);
jaroslav@1230:     ko.exportSymbol('applyBindingsToDescendants', ko.applyBindingsToDescendants);
jaroslav@1230:     ko.exportSymbol('applyBindingsToNode', ko.applyBindingsToNode);
jaroslav@1230:     ko.exportSymbol('contextFor', ko.contextFor);
jaroslav@1230:     ko.exportSymbol('dataFor', ko.dataFor);
jaroslav@1230: })();
jaroslav@1230: var attrHtmlToJavascriptMap = { 'class': 'className', 'for': 'htmlFor' };
jaroslav@1230: ko.bindingHandlers['attr'] = {
jaroslav@1230:     'update': function(element, valueAccessor, allBindingsAccessor) {
jaroslav@1230:         var value = ko.utils.unwrapObservable(valueAccessor()) || {};
jaroslav@1230:         for (var attrName in value) {
jaroslav@1230:             if (typeof attrName == "string") {
jaroslav@1230:                 var attrValue = ko.utils.unwrapObservable(value[attrName]);
jaroslav@1230: 
jaroslav@1230:                 // To cover cases like "attr: { checked:someProp }", we want to remove the attribute entirely
jaroslav@1230:                 // when someProp is a "no value"-like value (strictly null, false, or undefined)
jaroslav@1230:                 // (because the absence of the "checked" attr is how to mark an element as not checked, etc.)
jaroslav@1230:                 var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined);
jaroslav@1230:                 if (toRemove)
jaroslav@1230:                     element.removeAttribute(attrName);
jaroslav@1230: 
jaroslav@1230:                 // In IE <= 7 and IE8 Quirks Mode, you have to use the Javascript property name instead of the
jaroslav@1230:                 // HTML attribute name for certain attributes. IE8 Standards Mode supports the correct behavior,
jaroslav@1230:                 // but instead of figuring out the mode, we'll just set the attribute through the Javascript
jaroslav@1230:                 // property for IE <= 8.
jaroslav@1230:                 if (ko.utils.ieVersion <= 8 && attrName in attrHtmlToJavascriptMap) {
jaroslav@1230:                     attrName = attrHtmlToJavascriptMap[attrName];
jaroslav@1230:                     if (toRemove)
jaroslav@1230:                         element.removeAttribute(attrName);
jaroslav@1230:                     else
jaroslav@1230:                         element[attrName] = attrValue;
jaroslav@1230:                 } else if (!toRemove) {
jaroslav@1230:                     try {
jaroslav@1230:                         element.setAttribute(attrName, attrValue.toString());
jaroslav@1230:                     } catch (err) {
jaroslav@1230:                         // ignore for now
jaroslav@1230:                         if (console) {
jaroslav@1230:                             console.log("Can't set attribute " + attrName + " to " + attrValue + " error: " + err);
jaroslav@1230:                         }
jaroslav@1230:                     }
jaroslav@1230:                 }
jaroslav@1230: 
jaroslav@1230:                 // Treat "name" specially - although you can think of it as an attribute, it also needs
jaroslav@1230:                 // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333)
jaroslav@1230:                 // Deliberately being case-sensitive here because XHTML would regard "Name" as a different thing
jaroslav@1230:                 // entirely, and there's no strong reason to allow for such casing in HTML.
jaroslav@1230:                 if (attrName === "name") {
jaroslav@1230:                     ko.utils.setElementName(element, toRemove ? "" : attrValue.toString());
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: ko.bindingHandlers['checked'] = {
jaroslav@1230:     'init': function (element, valueAccessor, allBindingsAccessor) {
jaroslav@1230:         var updateHandler = function() {
jaroslav@1230:             var valueToWrite;
jaroslav@1230:             if (element.type == "checkbox") {
jaroslav@1230:                 valueToWrite = element.checked;
jaroslav@1230:             } else if ((element.type == "radio") && (element.checked)) {
jaroslav@1230:                 valueToWrite = element.value;
jaroslav@1230:             } else {
jaroslav@1230:                 return; // "checked" binding only responds to checkboxes and selected radio buttons
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             var modelValue = valueAccessor(), unwrappedValue = ko.utils.unwrapObservable(modelValue);
jaroslav@1230:             if ((element.type == "checkbox") && (unwrappedValue instanceof Array)) {
jaroslav@1230:                 // For checkboxes bound to an array, we add/remove the checkbox value to that array
jaroslav@1230:                 // This works for both observable and non-observable arrays
jaroslav@1230:                 var existingEntryIndex = ko.utils.arrayIndexOf(unwrappedValue, element.value);
jaroslav@1230:                 if (element.checked && (existingEntryIndex < 0))
jaroslav@1230:                     modelValue.push(element.value);
jaroslav@1230:                 else if ((!element.checked) && (existingEntryIndex >= 0))
jaroslav@1230:                     modelValue.splice(existingEntryIndex, 1);
jaroslav@1230:             } else {
jaroslav@1230:                 ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'checked', valueToWrite, true);
jaroslav@1230:             }
jaroslav@1230:         };
jaroslav@1230:         ko.utils.registerEventHandler(element, "click", updateHandler);
jaroslav@1230: 
jaroslav@1230:         // IE 6 won't allow radio buttons to be selected unless they have a name
jaroslav@1230:         if ((element.type == "radio") && !element.name)
jaroslav@1230:             ko.bindingHandlers['uniqueName']['init'](element, function() { return true });
jaroslav@1230:     },
jaroslav@1230:     'update': function (element, valueAccessor) {
jaroslav@1230:         var value = ko.utils.unwrapObservable(valueAccessor());
jaroslav@1230: 
jaroslav@1230:         if (element.type == "checkbox") {
jaroslav@1230:             if (value instanceof Array) {
jaroslav@1230:                 // When bound to an array, the checkbox being checked represents its value being present in that array
jaroslav@1230:                 element.checked = ko.utils.arrayIndexOf(value, element.value) >= 0;
jaroslav@1230:             } else {
jaroslav@1230:                 // When bound to anything other value (not an array), the checkbox being checked represents the value being trueish
jaroslav@1230:                 element.checked = value;
jaroslav@1230:             }
jaroslav@1230:         } else if (element.type == "radio") {
jaroslav@1230:             element.checked = (element.value == value);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: var classesWrittenByBindingKey = '__ko__cssValue';
jaroslav@1230: ko.bindingHandlers['css'] = {
jaroslav@1230:     'update': function (element, valueAccessor) {
jaroslav@1230:         var value = ko.utils.unwrapObservable(valueAccessor());
jaroslav@1230:         if (typeof value == "object") {
jaroslav@1230:             for (var className in value) {
jaroslav@1230:                 var shouldHaveClass = ko.utils.unwrapObservable(value[className]);
jaroslav@1230:                 ko.utils.toggleDomNodeCssClass(element, className, shouldHaveClass);
jaroslav@1230:             }
jaroslav@1230:         } else {
jaroslav@1230:             value = String(value || ''); // Make sure we don't try to store or set a non-string value
jaroslav@1230:             ko.utils.toggleDomNodeCssClass(element, element[classesWrittenByBindingKey], false);
jaroslav@1230:             element[classesWrittenByBindingKey] = value;
jaroslav@1230:             ko.utils.toggleDomNodeCssClass(element, value, true);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: ko.bindingHandlers['enable'] = {
jaroslav@1230:     'update': function (element, valueAccessor) {
jaroslav@1230:         var value = ko.utils.unwrapObservable(valueAccessor());
jaroslav@1230:         if (value && element.disabled)
jaroslav@1230:             element.removeAttribute("disabled");
jaroslav@1230:         else if ((!value) && (!element.disabled))
jaroslav@1230:             element.disabled = true;
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.bindingHandlers['disable'] = {
jaroslav@1230:     'update': function (element, valueAccessor) {
jaroslav@1230:         ko.bindingHandlers['enable']['update'](element, function() { return !ko.utils.unwrapObservable(valueAccessor()) });
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: // For certain common events (currently just 'click'), allow a simplified data-binding syntax
jaroslav@1230: // e.g. click:handler instead of the usual full-length event:{click:handler}
jaroslav@1230: function makeEventHandlerShortcut(eventName) {
jaroslav@1230:     ko.bindingHandlers[eventName] = {
jaroslav@1230:         'init': function(element, valueAccessor, allBindingsAccessor, viewModel) {
jaroslav@1230:             var newValueAccessor = function () {
jaroslav@1230:                 var result = {};
jaroslav@1230:                 result[eventName] = valueAccessor();
jaroslav@1230:                 return result;
jaroslav@1230:             };
jaroslav@1230:             return ko.bindingHandlers['event']['init'].call(this, element, newValueAccessor, allBindingsAccessor, viewModel);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: }
jaroslav@1230: 
jaroslav@1230: ko.bindingHandlers['event'] = {
jaroslav@1230:     'init' : function (element, valueAccessor, allBindingsAccessor, viewModel) {
jaroslav@1230:         var eventsToHandle = valueAccessor() || {};
jaroslav@1230:         for(var eventNameOutsideClosure in eventsToHandle) {
jaroslav@1230:             (function() {
jaroslav@1230:                 var eventName = eventNameOutsideClosure; // Separate variable to be captured by event handler closure
jaroslav@1230:                 if (typeof eventName == "string") {
jaroslav@1230:                     ko.utils.registerEventHandler(element, eventName, function (event) {
jaroslav@1230:                         var handlerReturnValue;
jaroslav@1230:                         var handlerFunction = valueAccessor()[eventName];
jaroslav@1230:                         if (!handlerFunction)
jaroslav@1230:                             return;
jaroslav@1230:                         var allBindings = allBindingsAccessor();
jaroslav@1230: 
jaroslav@1230:                         try {
jaroslav@1230:                             // Take all the event args, and prefix with the viewmodel
jaroslav@1230:                             var argsForHandler = ko.utils.makeArray(arguments);
jaroslav@1230:                             argsForHandler.unshift(viewModel);
jaroslav@1230:                             handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler);
jaroslav@1230:                         } finally {
jaroslav@1230:                             if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.
jaroslav@1230:                                 if (event.preventDefault)
jaroslav@1230:                                     event.preventDefault();
jaroslav@1230:                                 else
jaroslav@1230:                                     event.returnValue = false;
jaroslav@1230:                             }
jaroslav@1230:                         }
jaroslav@1230: 
jaroslav@1230:                         var bubble = allBindings[eventName + 'Bubble'] !== false;
jaroslav@1230:                         if (!bubble) {
jaroslav@1230:                             event.cancelBubble = true;
jaroslav@1230:                             if (event.stopPropagation)
jaroslav@1230:                                 event.stopPropagation();
jaroslav@1230:                         }
jaroslav@1230:                     });
jaroslav@1230:                 }
jaroslav@1230:             })();
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: // "foreach: someExpression" is equivalent to "template: { foreach: someExpression }"
jaroslav@1230: // "foreach: { data: someExpression, afterAdd: myfn }" is equivalent to "template: { foreach: someExpression, afterAdd: myfn }"
jaroslav@1230: ko.bindingHandlers['foreach'] = {
jaroslav@1230:     makeTemplateValueAccessor: function(valueAccessor) {
jaroslav@1230:         return function() {
jaroslav@1230:             var modelValue = valueAccessor(),
jaroslav@1230:                 unwrappedValue = ko.utils.peekObservable(modelValue);    // Unwrap without setting a dependency here
jaroslav@1230: 
jaroslav@1230:             // If unwrappedValue is the array, pass in the wrapped value on its own
jaroslav@1230:             // The value will be unwrapped and tracked within the template binding
jaroslav@1230:             // (See https://github.com/SteveSanderson/knockout/issues/523)
jaroslav@1230:             if ((!unwrappedValue) || typeof unwrappedValue.length == "number")
jaroslav@1230:                 return { 'foreach': modelValue, 'templateEngine': ko.nativeTemplateEngine.instance };
jaroslav@1230: 
jaroslav@1230:             // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates
jaroslav@1230:             ko.utils.unwrapObservable(modelValue);
jaroslav@1230:             return {
jaroslav@1230:                 'foreach': unwrappedValue['data'],
jaroslav@1230:                 'as': unwrappedValue['as'],
jaroslav@1230:                 'includeDestroyed': unwrappedValue['includeDestroyed'],
jaroslav@1230:                 'afterAdd': unwrappedValue['afterAdd'],
jaroslav@1230:                 'beforeRemove': unwrappedValue['beforeRemove'],
jaroslav@1230:                 'afterRender': unwrappedValue['afterRender'],
jaroslav@1230:                 'beforeMove': unwrappedValue['beforeMove'],
jaroslav@1230:                 'afterMove': unwrappedValue['afterMove'],
jaroslav@1230:                 'templateEngine': ko.nativeTemplateEngine.instance
jaroslav@1230:             };
jaroslav@1230:         };
jaroslav@1230:     },
jaroslav@1230:     'init': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
jaroslav@1230:         return ko.bindingHandlers['template']['init'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor));
jaroslav@1230:     },
jaroslav@1230:     'update': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
jaroslav@1230:         return ko.bindingHandlers['template']['update'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor), allBindingsAccessor, viewModel, bindingContext);
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: ko.expressionRewriting.bindingRewriteValidators['foreach'] = false; // Can't rewrite control flow bindings
jaroslav@1230: ko.virtualElements.allowedBindings['foreach'] = true;
jaroslav@1230: var hasfocusUpdatingProperty = '__ko_hasfocusUpdating';
jaroslav@1230: ko.bindingHandlers['hasfocus'] = {
jaroslav@1230:     'init': function(element, valueAccessor, allBindingsAccessor) {
jaroslav@1230:         var handleElementFocusChange = function(isFocused) {
jaroslav@1230:             // Where possible, ignore which event was raised and determine focus state using activeElement,
jaroslav@1230:             // as this avoids phantom focus/blur events raised when changing tabs in modern browsers.
jaroslav@1230:             // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers,
jaroslav@1230:             // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus
jaroslav@1230:             // from calling 'blur()' on the element when it loses focus.
jaroslav@1230:             // Discussion at https://github.com/SteveSanderson/knockout/pull/352
jaroslav@1230:             element[hasfocusUpdatingProperty] = true;
jaroslav@1230:             var ownerDoc = element.ownerDocument;
jaroslav@1230:             if ("activeElement" in ownerDoc) {
jaroslav@1230:                 isFocused = (ownerDoc.activeElement === element);
jaroslav@1230:             }
jaroslav@1230:             var modelValue = valueAccessor();
jaroslav@1230:             ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'hasfocus', isFocused, true);
jaroslav@1230:             element[hasfocusUpdatingProperty] = false;
jaroslav@1230:         };
jaroslav@1230:         var handleElementFocusIn = handleElementFocusChange.bind(null, true);
jaroslav@1230:         var handleElementFocusOut = handleElementFocusChange.bind(null, false);
jaroslav@1230: 
jaroslav@1230:         ko.utils.registerEventHandler(element, "focus", handleElementFocusIn);
jaroslav@1230:         ko.utils.registerEventHandler(element, "focusin", handleElementFocusIn); // For IE
jaroslav@1230:         ko.utils.registerEventHandler(element, "blur",  handleElementFocusOut);
jaroslav@1230:         ko.utils.registerEventHandler(element, "focusout",  handleElementFocusOut); // For IE
jaroslav@1230:     },
jaroslav@1230:     'update': function(element, valueAccessor) {
jaroslav@1230:         var value = ko.utils.unwrapObservable(valueAccessor());
jaroslav@1230:         if (!element[hasfocusUpdatingProperty]) {
jaroslav@1230:             value ? element.focus() : element.blur();
jaroslav@1230:             ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, value ? "focusin" : "focusout"]); // For IE, which doesn't reliably fire "focus" or "blur" events synchronously
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: ko.bindingHandlers['html'] = {
jaroslav@1230:     'init': function() {
jaroslav@1230:         // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications)
jaroslav@1230:         return { 'controlsDescendantBindings': true };
jaroslav@1230:     },
jaroslav@1230:     'update': function (element, valueAccessor) {
jaroslav@1230:         // setHtml will unwrap the value if needed
jaroslav@1230:         ko.utils.setHtml(element, valueAccessor());
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: var withIfDomDataKey = '__ko_withIfBindingData';
jaroslav@1230: // Makes a binding like with or if
jaroslav@1230: function makeWithIfBinding(bindingKey, isWith, isNot, makeContextCallback) {
jaroslav@1230:     ko.bindingHandlers[bindingKey] = {
jaroslav@1230:         'init': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
jaroslav@1230:             ko.utils.domData.set(element, withIfDomDataKey, {});
jaroslav@1230:             return { 'controlsDescendantBindings': true };
jaroslav@1230:         },
jaroslav@1230:         'update': function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
jaroslav@1230:             var withIfData = ko.utils.domData.get(element, withIfDomDataKey),
jaroslav@1230:                 dataValue = ko.utils.unwrapObservable(valueAccessor()),
jaroslav@1230:                 shouldDisplay = !isNot !== !dataValue, // equivalent to isNot ? !dataValue : !!dataValue
jaroslav@1230:                 isFirstRender = !withIfData.savedNodes,
jaroslav@1230:                 needsRefresh = isFirstRender || isWith || (shouldDisplay !== withIfData.didDisplayOnLastUpdate);
jaroslav@1230: 
jaroslav@1230:             if (needsRefresh) {
jaroslav@1230:                 if (isFirstRender) {
jaroslav@1230:                     withIfData.savedNodes = ko.utils.cloneNodes(ko.virtualElements.childNodes(element), true /* shouldCleanNodes */);
jaroslav@1230:                 }
jaroslav@1230: 
jaroslav@1230:                 if (shouldDisplay) {
jaroslav@1230:                     if (!isFirstRender) {
jaroslav@1230:                         ko.virtualElements.setDomNodeChildren(element, ko.utils.cloneNodes(withIfData.savedNodes));
jaroslav@1230:                     }
jaroslav@1230:                     ko.applyBindingsToDescendants(makeContextCallback ? makeContextCallback(bindingContext, dataValue) : bindingContext, element);
jaroslav@1230:                 } else {
jaroslav@1230:                     ko.virtualElements.emptyNode(element);
jaroslav@1230:                 }
jaroslav@1230: 
jaroslav@1230:                 withIfData.didDisplayOnLastUpdate = shouldDisplay;
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230:     ko.expressionRewriting.bindingRewriteValidators[bindingKey] = false; // Can't rewrite control flow bindings
jaroslav@1230:     ko.virtualElements.allowedBindings[bindingKey] = true;
jaroslav@1230: }
jaroslav@1230: 
jaroslav@1230: // Construct the actual binding handlers
jaroslav@1230: makeWithIfBinding('if');
jaroslav@1230: makeWithIfBinding('ifnot', false /* isWith */, true /* isNot */);
jaroslav@1230: makeWithIfBinding('with', true /* isWith */, false /* isNot */,
jaroslav@1230:     function(bindingContext, dataValue) {
jaroslav@1230:         return bindingContext['createChildContext'](dataValue);
jaroslav@1230:     }
jaroslav@1230: );
jaroslav@1230: function ensureDropdownSelectionIsConsistentWithModelValue(element, modelValue, preferModelValue) {
jaroslav@1230:     if (preferModelValue) {
jaroslav@1230:         if (modelValue !== ko.selectExtensions.readValue(element))
jaroslav@1230:             ko.selectExtensions.writeValue(element, modelValue);
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     // No matter which direction we're syncing in, we want the end result to be equality between dropdown value and model value.
jaroslav@1230:     // If they aren't equal, either we prefer the dropdown value, or the model value couldn't be represented, so either way,
jaroslav@1230:     // change the model value to match the dropdown.
jaroslav@1230:     if (modelValue !== ko.selectExtensions.readValue(element))
jaroslav@1230:         ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, "change"]);
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.bindingHandlers['options'] = {
jaroslav@1230:     'update': function (element, valueAccessor, allBindingsAccessor) {
jaroslav@1230:         if (ko.utils.tagNameLower(element) !== "select")
jaroslav@1230:             throw new Error("options binding applies only to SELECT elements");
jaroslav@1230: 
jaroslav@1230:         var selectWasPreviouslyEmpty = element.length == 0;
jaroslav@1230:         var previousSelectedValues = ko.utils.arrayMap(ko.utils.arrayFilter(element.childNodes, function (node) {
jaroslav@1230:             return node.tagName && (ko.utils.tagNameLower(node) === "option") && node.selected;
jaroslav@1230:         }), function (node) {
jaroslav@1230:             return ko.selectExtensions.readValue(node) || node.innerText || node.textContent;
jaroslav@1230:         });
jaroslav@1230:         var previousScrollTop = element.scrollTop;
jaroslav@1230: 
jaroslav@1230:         var value = ko.utils.unwrapObservable(valueAccessor());
jaroslav@1230:         var selectedValue = element.value;
jaroslav@1230: 
jaroslav@1230:         // Remove all existing <option>s.
jaroslav@1230:         // Need to use .remove() rather than .removeChild() for <option>s otherwise IE behaves oddly (https://github.com/SteveSanderson/knockout/issues/134)
jaroslav@1230:         while (element.length > 0) {
jaroslav@1230:             ko.cleanNode(element.options[0]);
jaroslav@1230:             element.remove(0);
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         if (value) {
jaroslav@1230:             var allBindings = allBindingsAccessor(),
jaroslav@1230:                 includeDestroyed = allBindings['optionsIncludeDestroyed'];
jaroslav@1230: 
jaroslav@1230:             if (typeof value.length != "number")
jaroslav@1230:                 value = [value];
jaroslav@1230:             if (allBindings['optionsCaption']) {
jaroslav@1230:                 var option = document.createElement("option");
jaroslav@1230:                 ko.utils.setHtml(option, allBindings['optionsCaption']);
jaroslav@1230:                 ko.selectExtensions.writeValue(option, undefined);
jaroslav@1230:                 element.appendChild(option);
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             for (var i = 0, j = value.length; i < j; i++) {
jaroslav@1230:                 // Skip destroyed items
jaroslav@1230:                 var arrayEntry = value[i];
jaroslav@1230:                 if (arrayEntry && arrayEntry['_destroy'] && !includeDestroyed)
jaroslav@1230:                     continue;
jaroslav@1230: 
jaroslav@1230:                 var option = document.createElement("option");
jaroslav@1230: 
jaroslav@1230:                 function applyToObject(object, predicate, defaultValue) {
jaroslav@1230:                     var predicateType = typeof predicate;
jaroslav@1230:                     if (predicateType == "function")    // Given a function; run it against the data value
jaroslav@1230:                         return predicate(object);
jaroslav@1230:                     else if (predicateType == "string") // Given a string; treat it as a property name on the data value
jaroslav@1230:                         return object[predicate];
jaroslav@1230:                     else                                // Given no optionsText arg; use the data value itself
jaroslav@1230:                         return defaultValue;
jaroslav@1230:                 }
jaroslav@1230: 
jaroslav@1230:                 // Apply a value to the option element
jaroslav@1230:                 var optionValue = applyToObject(arrayEntry, allBindings['optionsValue'], arrayEntry);
jaroslav@1230:                 ko.selectExtensions.writeValue(option, ko.utils.unwrapObservable(optionValue));
jaroslav@1230: 
jaroslav@1230:                 // Apply some text to the option element
jaroslav@1230:                 var optionText = applyToObject(arrayEntry, allBindings['optionsText'], optionValue);
jaroslav@1230:                 ko.utils.setTextContent(option, optionText);
jaroslav@1230: 
jaroslav@1230:                 element.appendChild(option);
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document.
jaroslav@1230:             // That's why we first added them without selection. Now it's time to set the selection.
jaroslav@1230:             var newOptions = element.getElementsByTagName("option");
jaroslav@1230:             var countSelectionsRetained = 0;
jaroslav@1230:             for (var i = 0, j = newOptions.length; i < j; i++) {
jaroslav@1230:                 if (ko.utils.arrayIndexOf(previousSelectedValues, ko.selectExtensions.readValue(newOptions[i])) >= 0) {
jaroslav@1230:                     ko.utils.setOptionNodeSelectionState(newOptions[i], true);
jaroslav@1230:                     countSelectionsRetained++;
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             element.scrollTop = previousScrollTop;
jaroslav@1230: 
jaroslav@1230:             if (selectWasPreviouslyEmpty && ('value' in allBindings)) {
jaroslav@1230:                 // Ensure consistency between model value and selected option.
jaroslav@1230:                 // If the dropdown is being populated for the first time here (or was otherwise previously empty),
jaroslav@1230:                 // the dropdown selection state is meaningless, so we preserve the model value.
jaroslav@1230:                 ensureDropdownSelectionIsConsistentWithModelValue(element, ko.utils.peekObservable(allBindings['value']), /* preferModelValue */ true);
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             // Workaround for IE9 bug
jaroslav@1230:             ko.utils.ensureSelectElementIsRenderedCorrectly(element);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: ko.bindingHandlers['options'].optionValueDomDataKey = '__ko.optionValueDomData__';
jaroslav@1230: ko.bindingHandlers['selectedOptions'] = {
jaroslav@1230:     'init': function (element, valueAccessor, allBindingsAccessor) {
jaroslav@1230:         ko.utils.registerEventHandler(element, "change", function () {
jaroslav@1230:             var value = valueAccessor(), valueToWrite = [];
jaroslav@1230:             ko.utils.arrayForEach(element.getElementsByTagName("option"), function(node) {
jaroslav@1230:                 if (node.selected)
jaroslav@1230:                     valueToWrite.push(ko.selectExtensions.readValue(node));
jaroslav@1230:             });
jaroslav@1230:             ko.expressionRewriting.writeValueToProperty(value, allBindingsAccessor, 'value', valueToWrite);
jaroslav@1230:         });
jaroslav@1230:     },
jaroslav@1230:     'update': function (element, valueAccessor) {
jaroslav@1230:         if (ko.utils.tagNameLower(element) != "select")
jaroslav@1230:             throw new Error("values binding applies only to SELECT elements");
jaroslav@1230: 
jaroslav@1230:         var newValue = ko.utils.unwrapObservable(valueAccessor());
jaroslav@1230:         if (newValue && typeof newValue.length == "number") {
jaroslav@1230:             ko.utils.arrayForEach(element.getElementsByTagName("option"), function(node) {
jaroslav@1230:                 var isSelected = ko.utils.arrayIndexOf(newValue, ko.selectExtensions.readValue(node)) >= 0;
jaroslav@1230:                 ko.utils.setOptionNodeSelectionState(node, isSelected);
jaroslav@1230:             });
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: ko.bindingHandlers['style'] = {
jaroslav@1230:     'update': function (element, valueAccessor) {
jaroslav@1230:         var value = ko.utils.unwrapObservable(valueAccessor() || {});
jaroslav@1230:         for (var styleName in value) {
jaroslav@1230:             if (typeof styleName == "string") {
jaroslav@1230:                 var styleValue = ko.utils.unwrapObservable(value[styleName]);
jaroslav@1230:                 element.style[styleName] = styleValue || ""; // Empty string removes the value, whereas null/undefined have no effect
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: ko.bindingHandlers['submit'] = {
jaroslav@1230:     'init': function (element, valueAccessor, allBindingsAccessor, viewModel) {
jaroslav@1230:         if (typeof valueAccessor() != "function")
jaroslav@1230:             throw new Error("The value for a submit binding must be a function");
jaroslav@1230:         ko.utils.registerEventHandler(element, "submit", function (event) {
jaroslav@1230:             var handlerReturnValue;
jaroslav@1230:             var value = valueAccessor();
jaroslav@1230:             try { handlerReturnValue = value.call(viewModel, element); }
jaroslav@1230:             finally {
jaroslav@1230:                 if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.
jaroslav@1230:                     if (event.preventDefault)
jaroslav@1230:                         event.preventDefault();
jaroslav@1230:                     else
jaroslav@1230:                         event.returnValue = false;
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230:         });
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: ko.bindingHandlers['text'] = {
jaroslav@1230:     'update': function (element, valueAccessor) {
jaroslav@1230:         ko.utils.setTextContent(element, valueAccessor());
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: ko.virtualElements.allowedBindings['text'] = true;
jaroslav@1230: ko.bindingHandlers['uniqueName'] = {
jaroslav@1230:     'init': function (element, valueAccessor) {
jaroslav@1230:         if (valueAccessor()) {
jaroslav@1230:             var name = "ko_unique_" + (++ko.bindingHandlers['uniqueName'].currentIndex);
jaroslav@1230:             ko.utils.setElementName(element, name);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: ko.bindingHandlers['uniqueName'].currentIndex = 0;
jaroslav@1230: ko.bindingHandlers['value'] = {
jaroslav@1230:     'init': function (element, valueAccessor, allBindingsAccessor) {
jaroslav@1230:         // Always catch "change" event; possibly other events too if asked
jaroslav@1230:         var eventsToCatch = ["change"];
jaroslav@1230:         var requestedEventsToCatch = allBindingsAccessor()["valueUpdate"];
jaroslav@1230:         var propertyChangedFired = false;
jaroslav@1230:         if (requestedEventsToCatch) {
jaroslav@1230:             if (typeof requestedEventsToCatch == "string") // Allow both individual event names, and arrays of event names
jaroslav@1230:                 requestedEventsToCatch = [requestedEventsToCatch];
jaroslav@1230:             ko.utils.arrayPushAll(eventsToCatch, requestedEventsToCatch);
jaroslav@1230:             eventsToCatch = ko.utils.arrayGetDistinctValues(eventsToCatch);
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         var valueUpdateHandler = function() {
jaroslav@1230:             propertyChangedFired = false;
jaroslav@1230:             var modelValue = valueAccessor();
jaroslav@1230:             var elementValue = ko.selectExtensions.readValue(element);
jaroslav@1230:             ko.expressionRewriting.writeValueToProperty(modelValue, allBindingsAccessor, 'value', elementValue);
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         // Workaround for https://github.com/SteveSanderson/knockout/issues/122
jaroslav@1230:         // IE doesn't fire "change" events on textboxes if the user selects a value from its autocomplete list
jaroslav@1230:         var ieAutoCompleteHackNeeded = ko.utils.ieVersion && element.tagName.toLowerCase() == "input" && element.type == "text"
jaroslav@1230:                                        && element.autocomplete != "off" && (!element.form || element.form.autocomplete != "off");
jaroslav@1230:         if (ieAutoCompleteHackNeeded && ko.utils.arrayIndexOf(eventsToCatch, "propertychange") == -1) {
jaroslav@1230:             ko.utils.registerEventHandler(element, "propertychange", function () { propertyChangedFired = true });
jaroslav@1230:             ko.utils.registerEventHandler(element, "blur", function() {
jaroslav@1230:                 if (propertyChangedFired) {
jaroslav@1230:                     valueUpdateHandler();
jaroslav@1230:                 }
jaroslav@1230:             });
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         ko.utils.arrayForEach(eventsToCatch, function(eventName) {
jaroslav@1230:             // The syntax "after<eventname>" means "run the handler asynchronously after the event"
jaroslav@1230:             // This is useful, for example, to catch "keydown" events after the browser has updated the control
jaroslav@1230:             // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event)
jaroslav@1230:             var handler = valueUpdateHandler;
jaroslav@1230:             if (ko.utils.stringStartsWith(eventName, "after")) {
jaroslav@1230:                 handler = function() { setTimeout(valueUpdateHandler, 0) };
jaroslav@1230:                 eventName = eventName.substring("after".length);
jaroslav@1230:             }
jaroslav@1230:             ko.utils.registerEventHandler(element, eventName, handler);
jaroslav@1230:         });
jaroslav@1230:     },
jaroslav@1230:     'update': function (element, valueAccessor) {
jaroslav@1230:         var valueIsSelectOption = ko.utils.tagNameLower(element) === "select";
jaroslav@1230:         var newValue = ko.utils.unwrapObservable(valueAccessor());
jaroslav@1230:         var elementValue = ko.selectExtensions.readValue(element);
jaroslav@1230:         var valueHasChanged = (newValue != elementValue);
jaroslav@1230: 
jaroslav@1230:         // JavaScript's 0 == "" behavious is unfortunate here as it prevents writing 0 to an empty text box (loose equality suggests the values are the same).
jaroslav@1230:         // We don't want to do a strict equality comparison as that is more confusing for developers in certain cases, so we specifically special case 0 != "" here.
jaroslav@1230:         if ((newValue === 0) && (elementValue !== 0) && (elementValue !== "0"))
jaroslav@1230:             valueHasChanged = true;
jaroslav@1230: 
jaroslav@1230:         if (valueHasChanged) {
jaroslav@1230:             var applyValueAction = function () { ko.selectExtensions.writeValue(element, newValue); };
jaroslav@1230:             applyValueAction();
jaroslav@1230: 
jaroslav@1230:             // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread
jaroslav@1230:             // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread
jaroslav@1230:             // to apply the value as well.
jaroslav@1230:             var alsoApplyAsynchronously = valueIsSelectOption;
jaroslav@1230:             if (alsoApplyAsynchronously)
jaroslav@1230:                 setTimeout(applyValueAction, 0);
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change,
jaroslav@1230:         // because you're not allowed to have a model value that disagrees with a visible UI selection.
jaroslav@1230:         if (valueIsSelectOption && (element.length > 0))
jaroslav@1230:             ensureDropdownSelectionIsConsistentWithModelValue(element, newValue, /* preferModelValue */ false);
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: ko.bindingHandlers['visible'] = {
jaroslav@1230:     'update': function (element, valueAccessor) {
jaroslav@1230:         var value = ko.utils.unwrapObservable(valueAccessor());
jaroslav@1230:         var isCurrentlyVisible = !(element.style.display == "none");
jaroslav@1230:         if (value && !isCurrentlyVisible)
jaroslav@1230:             element.style.display = "";
jaroslav@1230:         else if ((!value) && isCurrentlyVisible)
jaroslav@1230:             element.style.display = "none";
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: // 'click' is just a shorthand for the usual full-length event:{click:handler}
jaroslav@1230: makeEventHandlerShortcut('click');
jaroslav@1230: // If you want to make a custom template engine,
jaroslav@1230: //
jaroslav@1230: // [1] Inherit from this class (like ko.nativeTemplateEngine does)
jaroslav@1230: // [2] Override 'renderTemplateSource', supplying a function with this signature:
jaroslav@1230: //
jaroslav@1230: //        function (templateSource, bindingContext, options) {
jaroslav@1230: //            // - templateSource.text() is the text of the template you should render
jaroslav@1230: //            // - bindingContext.$data is the data you should pass into the template
jaroslav@1230: //            //   - you might also want to make bindingContext.$parent, bindingContext.$parents,
jaroslav@1230: //            //     and bindingContext.$root available in the template too
jaroslav@1230: //            // - options gives you access to any other properties set on "data-bind: { template: options }"
jaroslav@1230: //            //
jaroslav@1230: //            // Return value: an array of DOM nodes
jaroslav@1230: //        }
jaroslav@1230: //
jaroslav@1230: // [3] Override 'createJavaScriptEvaluatorBlock', supplying a function with this signature:
jaroslav@1230: //
jaroslav@1230: //        function (script) {
jaroslav@1230: //            // Return value: Whatever syntax means "Evaluate the JavaScript statement 'script' and output the result"
jaroslav@1230: //            //               For example, the jquery.tmpl template engine converts 'someScript' to '${ someScript }'
jaroslav@1230: //        }
jaroslav@1230: //
jaroslav@1230: //     This is only necessary if you want to allow data-bind attributes to reference arbitrary template variables.
jaroslav@1230: //     If you don't want to allow that, you can set the property 'allowTemplateRewriting' to false (like ko.nativeTemplateEngine does)
jaroslav@1230: //     and then you don't need to override 'createJavaScriptEvaluatorBlock'.
jaroslav@1230: 
jaroslav@1230: ko.templateEngine = function () { };
jaroslav@1230: 
jaroslav@1230: ko.templateEngine.prototype['renderTemplateSource'] = function (templateSource, bindingContext, options) {
jaroslav@1230:     throw new Error("Override renderTemplateSource");
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.templateEngine.prototype['createJavaScriptEvaluatorBlock'] = function (script) {
jaroslav@1230:     throw new Error("Override createJavaScriptEvaluatorBlock");
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.templateEngine.prototype['makeTemplateSource'] = function(template, templateDocument) {
jaroslav@1230:     // Named template
jaroslav@1230:     if (typeof template == "string") {
jaroslav@1230:         templateDocument = templateDocument || document;
jaroslav@1230:         var elem = templateDocument.getElementById(template);
jaroslav@1230:         if (!elem)
jaroslav@1230:             throw new Error("Cannot find template with ID " + template);
jaroslav@1230:         return new ko.templateSources.domElement(elem);
jaroslav@1230:     } else if ((template.nodeType == 1) || (template.nodeType == 8)) {
jaroslav@1230:         // Anonymous template
jaroslav@1230:         return new ko.templateSources.anonymousTemplate(template);
jaroslav@1230:     } else
jaroslav@1230:         throw new Error("Unknown template type: " + template);
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.templateEngine.prototype['renderTemplate'] = function (template, bindingContext, options, templateDocument) {
jaroslav@1230:     var templateSource = this['makeTemplateSource'](template, templateDocument);
jaroslav@1230:     return this['renderTemplateSource'](templateSource, bindingContext, options);
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.templateEngine.prototype['isTemplateRewritten'] = function (template, templateDocument) {
jaroslav@1230:     // Skip rewriting if requested
jaroslav@1230:     if (this['allowTemplateRewriting'] === false)
jaroslav@1230:         return true;
jaroslav@1230:     return this['makeTemplateSource'](template, templateDocument)['data']("isRewritten");
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.templateEngine.prototype['rewriteTemplate'] = function (template, rewriterCallback, templateDocument) {
jaroslav@1230:     var templateSource = this['makeTemplateSource'](template, templateDocument);
jaroslav@1230:     var rewritten = rewriterCallback(templateSource['text']());
jaroslav@1230:     templateSource['text'](rewritten);
jaroslav@1230:     templateSource['data']("isRewritten", true);
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('templateEngine', ko.templateEngine);
jaroslav@1230: 
jaroslav@1230: ko.templateRewriting = (function () {
jaroslav@1230:     var memoizeDataBindingAttributeSyntaxRegex = /(<[a-z]+\d*(\s+(?!data-bind=)[a-z0-9\-]+(=(\"[^\"]*\"|\'[^\']*\'))?)*\s+)data-bind=(["'])([\s\S]*?)\5/gi;
jaroslav@1230:     var memoizeVirtualContainerBindingSyntaxRegex = /<!--\s*ko\b\s*([\s\S]*?)\s*-->/g;
jaroslav@1230: 
jaroslav@1230:     function validateDataBindValuesForRewriting(keyValueArray) {
jaroslav@1230:         var allValidators = ko.expressionRewriting.bindingRewriteValidators;
jaroslav@1230:         for (var i = 0; i < keyValueArray.length; i++) {
jaroslav@1230:             var key = keyValueArray[i]['key'];
jaroslav@1230:             if (allValidators.hasOwnProperty(key)) {
jaroslav@1230:                 var validator = allValidators[key];
jaroslav@1230: 
jaroslav@1230:                 if (typeof validator === "function") {
jaroslav@1230:                     var possibleErrorMessage = validator(keyValueArray[i]['value']);
jaroslav@1230:                     if (possibleErrorMessage)
jaroslav@1230:                         throw new Error(possibleErrorMessage);
jaroslav@1230:                 } else if (!validator) {
jaroslav@1230:                     throw new Error("This template engine does not support the '" + key + "' binding within its templates");
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function constructMemoizedTagReplacement(dataBindAttributeValue, tagToRetain, templateEngine) {
jaroslav@1230:         var dataBindKeyValueArray = ko.expressionRewriting.parseObjectLiteral(dataBindAttributeValue);
jaroslav@1230:         validateDataBindValuesForRewriting(dataBindKeyValueArray);
jaroslav@1230:         var rewrittenDataBindAttributeValue = ko.expressionRewriting.preProcessBindings(dataBindKeyValueArray);
jaroslav@1230: 
jaroslav@1230:         // For no obvious reason, Opera fails to evaluate rewrittenDataBindAttributeValue unless it's wrapped in an additional
jaroslav@1230:         // anonymous function, even though Opera's built-in debugger can evaluate it anyway. No other browser requires this
jaroslav@1230:         // extra indirection.
jaroslav@1230:         var applyBindingsToNextSiblingScript =
jaroslav@1230:             "ko.__tr_ambtns(function($context,$element){return(function(){return{ " + rewrittenDataBindAttributeValue + " } })()})";
jaroslav@1230:         return templateEngine['createJavaScriptEvaluatorBlock'](applyBindingsToNextSiblingScript) + tagToRetain;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     return {
jaroslav@1230:         ensureTemplateIsRewritten: function (template, templateEngine, templateDocument) {
jaroslav@1230:             if (!templateEngine['isTemplateRewritten'](template, templateDocument))
jaroslav@1230:                 templateEngine['rewriteTemplate'](template, function (htmlString) {
jaroslav@1230:                     return ko.templateRewriting.memoizeBindingAttributeSyntax(htmlString, templateEngine);
jaroslav@1230:                 }, templateDocument);
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         memoizeBindingAttributeSyntax: function (htmlString, templateEngine) {
jaroslav@1230:             return htmlString.replace(memoizeDataBindingAttributeSyntaxRegex, function () {
jaroslav@1230:                 return constructMemoizedTagReplacement(/* dataBindAttributeValue: */ arguments[6], /* tagToRetain: */ arguments[1], templateEngine);
jaroslav@1230:             }).replace(memoizeVirtualContainerBindingSyntaxRegex, function() {
jaroslav@1230:                 return constructMemoizedTagReplacement(/* dataBindAttributeValue: */ arguments[1], /* tagToRetain: */ "<!-- ko -->", templateEngine);
jaroslav@1230:             });
jaroslav@1230:         },
jaroslav@1230: 
jaroslav@1230:         applyMemoizedBindingsToNextSibling: function (bindings) {
jaroslav@1230:             return ko.memoization.memoize(function (domNode, bindingContext) {
jaroslav@1230:                 if (domNode.nextSibling)
jaroslav@1230:                     ko.applyBindingsToNode(domNode.nextSibling, bindings, bindingContext);
jaroslav@1230:             });
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: 
jaroslav@1230: // Exported only because it has to be referenced by string lookup from within rewritten template
jaroslav@1230: ko.exportSymbol('__tr_ambtns', ko.templateRewriting.applyMemoizedBindingsToNextSibling);
jaroslav@1230: (function() {
jaroslav@1230:     // A template source represents a read/write way of accessing a template. This is to eliminate the need for template loading/saving
jaroslav@1230:     // logic to be duplicated in every template engine (and means they can all work with anonymous templates, etc.)
jaroslav@1230:     //
jaroslav@1230:     // Two are provided by default:
jaroslav@1230:     //  1. ko.templateSources.domElement       - reads/writes the text content of an arbitrary DOM element
jaroslav@1230:     //  2. ko.templateSources.anonymousElement - uses ko.utils.domData to read/write text *associated* with the DOM element, but
jaroslav@1230:     //                                           without reading/writing the actual element text content, since it will be overwritten
jaroslav@1230:     //                                           with the rendered template output.
jaroslav@1230:     // You can implement your own template source if you want to fetch/store templates somewhere other than in DOM elements.
jaroslav@1230:     // Template sources need to have the following functions:
jaroslav@1230:     //   text() 			- returns the template text from your storage location
jaroslav@1230:     //   text(value)		- writes the supplied template text to your storage location
jaroslav@1230:     //   data(key)			- reads values stored using data(key, value) - see below
jaroslav@1230:     //   data(key, value)	- associates "value" with this template and the key "key". Is used to store information like "isRewritten".
jaroslav@1230:     //
jaroslav@1230:     // Optionally, template sources can also have the following functions:
jaroslav@1230:     //   nodes()            - returns a DOM element containing the nodes of this template, where available
jaroslav@1230:     //   nodes(value)       - writes the given DOM element to your storage location
jaroslav@1230:     // If a DOM element is available for a given template source, template engines are encouraged to use it in preference over text()
jaroslav@1230:     // for improved speed. However, all templateSources must supply text() even if they don't supply nodes().
jaroslav@1230:     //
jaroslav@1230:     // Once you've implemented a templateSource, make your template engine use it by subclassing whatever template engine you were
jaroslav@1230:     // using and overriding "makeTemplateSource" to return an instance of your custom template source.
jaroslav@1230: 
jaroslav@1230:     ko.templateSources = {};
jaroslav@1230: 
jaroslav@1230:     // ---- ko.templateSources.domElement -----
jaroslav@1230: 
jaroslav@1230:     ko.templateSources.domElement = function(element) {
jaroslav@1230:         this.domElement = element;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     ko.templateSources.domElement.prototype['text'] = function(/* valueToWrite */) {
jaroslav@1230:         var tagNameLower = ko.utils.tagNameLower(this.domElement),
jaroslav@1230:             elemContentsProperty = tagNameLower === "script" ? "text"
jaroslav@1230:                                  : tagNameLower === "textarea" ? "value"
jaroslav@1230:                                  : "innerHTML";
jaroslav@1230: 
jaroslav@1230:         if (arguments.length == 0) {
jaroslav@1230:             return this.domElement[elemContentsProperty];
jaroslav@1230:         } else {
jaroslav@1230:             var valueToWrite = arguments[0];
jaroslav@1230:             if (elemContentsProperty === "innerHTML")
jaroslav@1230:                 ko.utils.setHtml(this.domElement, valueToWrite);
jaroslav@1230:             else
jaroslav@1230:                 this.domElement[elemContentsProperty] = valueToWrite;
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.templateSources.domElement.prototype['data'] = function(key /*, valueToWrite */) {
jaroslav@1230:         if (arguments.length === 1) {
jaroslav@1230:             return ko.utils.domData.get(this.domElement, "templateSourceData_" + key);
jaroslav@1230:         } else {
jaroslav@1230:             ko.utils.domData.set(this.domElement, "templateSourceData_" + key, arguments[1]);
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     // ---- ko.templateSources.anonymousTemplate -----
jaroslav@1230:     // Anonymous templates are normally saved/retrieved as DOM nodes through "nodes".
jaroslav@1230:     // For compatibility, you can also read "text"; it will be serialized from the nodes on demand.
jaroslav@1230:     // Writing to "text" is still supported, but then the template data will not be available as DOM nodes.
jaroslav@1230: 
jaroslav@1230:     var anonymousTemplatesDomDataKey = "__ko_anon_template__";
jaroslav@1230:     ko.templateSources.anonymousTemplate = function(element) {
jaroslav@1230:         this.domElement = element;
jaroslav@1230:     }
jaroslav@1230:     ko.templateSources.anonymousTemplate.prototype = new ko.templateSources.domElement();
jaroslav@1230:     ko.templateSources.anonymousTemplate.prototype['text'] = function(/* valueToWrite */) {
jaroslav@1230:         if (arguments.length == 0) {
jaroslav@1230:             var templateData = ko.utils.domData.get(this.domElement, anonymousTemplatesDomDataKey) || {};
jaroslav@1230:             if (templateData.textData === undefined && templateData.containerData)
jaroslav@1230:                 templateData.textData = templateData.containerData.innerHTML;
jaroslav@1230:             return templateData.textData;
jaroslav@1230:         } else {
jaroslav@1230:             var valueToWrite = arguments[0];
jaroslav@1230:             ko.utils.domData.set(this.domElement, anonymousTemplatesDomDataKey, {textData: valueToWrite});
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230:     ko.templateSources.domElement.prototype['nodes'] = function(/* valueToWrite */) {
jaroslav@1230:         if (arguments.length == 0) {
jaroslav@1230:             var templateData = ko.utils.domData.get(this.domElement, anonymousTemplatesDomDataKey) || {};
jaroslav@1230:             return templateData.containerData;
jaroslav@1230:         } else {
jaroslav@1230:             var valueToWrite = arguments[0];
jaroslav@1230:             ko.utils.domData.set(this.domElement, anonymousTemplatesDomDataKey, {containerData: valueToWrite});
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.exportSymbol('templateSources', ko.templateSources);
jaroslav@1230:     ko.exportSymbol('templateSources.domElement', ko.templateSources.domElement);
jaroslav@1230:     ko.exportSymbol('templateSources.anonymousTemplate', ko.templateSources.anonymousTemplate);
jaroslav@1230: })();
jaroslav@1230: (function () {
jaroslav@1230:     var _templateEngine;
jaroslav@1230:     ko.setTemplateEngine = function (templateEngine) {
jaroslav@1230:         if ((templateEngine != undefined) && !(templateEngine instanceof ko.templateEngine))
jaroslav@1230:             throw new Error("templateEngine must inherit from ko.templateEngine");
jaroslav@1230:         _templateEngine = templateEngine;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, action) {
jaroslav@1230:         var node, nextInQueue = firstNode, firstOutOfRangeNode = ko.virtualElements.nextSibling(lastNode);
jaroslav@1230:         while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) {
jaroslav@1230:             nextInQueue = ko.virtualElements.nextSibling(node);
jaroslav@1230:             if (node.nodeType === 1 || node.nodeType === 8)
jaroslav@1230:                 action(node);
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function activateBindingsOnContinuousNodeArray(continuousNodeArray, bindingContext) {
jaroslav@1230:         // To be used on any nodes that have been rendered by a template and have been inserted into some parent element
jaroslav@1230:         // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because
jaroslav@1230:         // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense,
jaroslav@1230:         // (1) Does a regular "applyBindings" to associate bindingContext with this node and to activate any non-memoized bindings
jaroslav@1230:         // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting)
jaroslav@1230: 
jaroslav@1230:         if (continuousNodeArray.length) {
jaroslav@1230:             var firstNode = continuousNodeArray[0], lastNode = continuousNodeArray[continuousNodeArray.length - 1];
jaroslav@1230: 
jaroslav@1230:             // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind)
jaroslav@1230:             // whereas a regular applyBindings won't introduce new memoized nodes
jaroslav@1230:             invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, function(node) {
jaroslav@1230:                 ko.applyBindings(bindingContext, node);
jaroslav@1230:             });
jaroslav@1230:             invokeForEachNodeOrCommentInContinuousRange(firstNode, lastNode, function(node) {
jaroslav@1230:                 ko.memoization.unmemoizeDomNodeAndDescendants(node, [bindingContext]);
jaroslav@1230:             });
jaroslav@1230:         }
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function getFirstNodeFromPossibleArray(nodeOrNodeArray) {
jaroslav@1230:         return nodeOrNodeArray.nodeType ? nodeOrNodeArray
jaroslav@1230:                                         : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0]
jaroslav@1230:                                         : null;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function executeTemplate(targetNodeOrNodeArray, renderMode, template, bindingContext, options) {
jaroslav@1230:         options = options || {};
jaroslav@1230:         var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
jaroslav@1230:         var templateDocument = firstTargetNode && firstTargetNode.ownerDocument;
jaroslav@1230:         var templateEngineToUse = (options['templateEngine'] || _templateEngine);
jaroslav@1230:         ko.templateRewriting.ensureTemplateIsRewritten(template, templateEngineToUse, templateDocument);
jaroslav@1230:         var renderedNodesArray = templateEngineToUse['renderTemplate'](template, bindingContext, options, templateDocument);
jaroslav@1230: 
jaroslav@1230:         // Loosely check result is an array of DOM nodes
jaroslav@1230:         if ((typeof renderedNodesArray.length != "number") || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType != "number"))
jaroslav@1230:             throw new Error("Template engine must return an array of DOM nodes");
jaroslav@1230: 
jaroslav@1230:         var haveAddedNodesToParent = false;
jaroslav@1230:         switch (renderMode) {
jaroslav@1230:             case "replaceChildren":
jaroslav@1230:                 ko.virtualElements.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray);
jaroslav@1230:                 haveAddedNodesToParent = true;
jaroslav@1230:                 break;
jaroslav@1230:             case "replaceNode":
jaroslav@1230:                 ko.utils.replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray);
jaroslav@1230:                 haveAddedNodesToParent = true;
jaroslav@1230:                 break;
jaroslav@1230:             case "ignoreTargetNode": break;
jaroslav@1230:             default:
jaroslav@1230:                 throw new Error("Unknown renderMode: " + renderMode);
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         if (haveAddedNodesToParent) {
jaroslav@1230:             activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext);
jaroslav@1230:             if (options['afterRender'])
jaroslav@1230:                 ko.dependencyDetection.ignore(options['afterRender'], null, [renderedNodesArray, bindingContext['$data']]);
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         return renderedNodesArray;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     ko.renderTemplate = function (template, dataOrBindingContext, options, targetNodeOrNodeArray, renderMode) {
jaroslav@1230:         options = options || {};
jaroslav@1230:         if ((options['templateEngine'] || _templateEngine) == undefined)
jaroslav@1230:             throw new Error("Set a template engine before calling renderTemplate");
jaroslav@1230:         renderMode = renderMode || "replaceChildren";
jaroslav@1230: 
jaroslav@1230:         if (targetNodeOrNodeArray) {
jaroslav@1230:             var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
jaroslav@1230: 
jaroslav@1230:             var whenToDispose = function () { return (!firstTargetNode) || !ko.utils.domNodeIsAttachedToDocument(firstTargetNode); }; // Passive disposal (on next evaluation)
jaroslav@1230:             var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode == "replaceNode") ? firstTargetNode.parentNode : firstTargetNode;
jaroslav@1230: 
jaroslav@1230:             return ko.dependentObservable( // So the DOM is automatically updated when any dependency changes
jaroslav@1230:                 function () {
jaroslav@1230:                     // Ensure we've got a proper binding context to work with
jaroslav@1230:                     var bindingContext = (dataOrBindingContext && (dataOrBindingContext instanceof ko.bindingContext))
jaroslav@1230:                         ? dataOrBindingContext
jaroslav@1230:                         : new ko.bindingContext(ko.utils.unwrapObservable(dataOrBindingContext));
jaroslav@1230: 
jaroslav@1230:                     // Support selecting template as a function of the data being rendered
jaroslav@1230:                     var templateName = typeof(template) == 'function' ? template(bindingContext['$data'], bindingContext) : template;
jaroslav@1230: 
jaroslav@1230:                     var renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext, options);
jaroslav@1230:                     if (renderMode == "replaceNode") {
jaroslav@1230:                         targetNodeOrNodeArray = renderedNodesArray;
jaroslav@1230:                         firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
jaroslav@1230:                     }
jaroslav@1230:                 },
jaroslav@1230:                 null,
jaroslav@1230:                 { disposeWhen: whenToDispose, disposeWhenNodeIsRemoved: activelyDisposeWhenNodeIsRemoved }
jaroslav@1230:             );
jaroslav@1230:         } else {
jaroslav@1230:             // 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
jaroslav@1230:             return ko.memoization.memoize(function (domNode) {
jaroslav@1230:                 ko.renderTemplate(template, dataOrBindingContext, options, domNode, "replaceNode");
jaroslav@1230:             });
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.renderTemplateForEach = function (template, arrayOrObservableArray, options, targetNode, parentBindingContext) {
jaroslav@1230:         // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then
jaroslav@1230:         // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter.
jaroslav@1230:         var arrayItemContext;
jaroslav@1230: 
jaroslav@1230:         // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode
jaroslav@1230:         var executeTemplateForArrayItem = function (arrayValue, index) {
jaroslav@1230:             // Support selecting template as a function of the data being rendered
jaroslav@1230:             arrayItemContext = parentBindingContext['createChildContext'](ko.utils.unwrapObservable(arrayValue), options['as']);
jaroslav@1230:             arrayItemContext['$index'] = index;
jaroslav@1230:             var templateName = typeof(template) == 'function' ? template(arrayValue, arrayItemContext) : template;
jaroslav@1230:             return executeTemplate(null, "ignoreTargetNode", templateName, arrayItemContext, options);
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode
jaroslav@1230:         var activateBindingsCallback = function(arrayValue, addedNodesArray, index) {
jaroslav@1230:             activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext);
jaroslav@1230:             if (options['afterRender'])
jaroslav@1230:                 options['afterRender'](addedNodesArray, arrayValue);
jaroslav@1230:         };
jaroslav@1230: 
jaroslav@1230:         return ko.dependentObservable(function () {
jaroslav@1230:             var unwrappedArray = ko.utils.unwrapObservable(arrayOrObservableArray) || [];
jaroslav@1230:             if (typeof unwrappedArray.length == "undefined") // Coerce single value into array
jaroslav@1230:                 unwrappedArray = [unwrappedArray];
jaroslav@1230: 
jaroslav@1230:             // Filter out any entries marked as destroyed
jaroslav@1230:             var filteredArray = ko.utils.arrayFilter(unwrappedArray, function(item) {
jaroslav@1230:                 return options['includeDestroyed'] || item === undefined || item === null || !ko.utils.unwrapObservable(item['_destroy']);
jaroslav@1230:             });
jaroslav@1230: 
jaroslav@1230:             // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function).
jaroslav@1230:             // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping.
jaroslav@1230:             ko.dependencyDetection.ignore(ko.utils.setDomNodeChildrenFromArrayMapping, null, [targetNode, filteredArray, executeTemplateForArrayItem, options, activateBindingsCallback]);
jaroslav@1230: 
jaroslav@1230:         }, null, { disposeWhenNodeIsRemoved: targetNode });
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     var templateComputedDomDataKey = '__ko__templateComputedDomDataKey__';
jaroslav@1230:     function disposeOldComputedAndStoreNewOne(element, newComputed) {
jaroslav@1230:         var oldComputed = ko.utils.domData.get(element, templateComputedDomDataKey);
jaroslav@1230:         if (oldComputed && (typeof(oldComputed.dispose) == 'function'))
jaroslav@1230:             oldComputed.dispose();
jaroslav@1230:         ko.utils.domData.set(element, templateComputedDomDataKey, (newComputed && newComputed.isActive()) ? newComputed : undefined);
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     ko.bindingHandlers['template'] = {
jaroslav@1230:         'init': function(element, valueAccessor) {
jaroslav@1230:             // Support anonymous templates
jaroslav@1230:             var bindingValue = ko.utils.unwrapObservable(valueAccessor());
jaroslav@1230:             if ((typeof bindingValue != "string") && (!bindingValue['name']) && (element.nodeType == 1 || element.nodeType == 8)) {
jaroslav@1230:                 // It's an anonymous template - store the element contents, then clear the element
jaroslav@1230:                 var templateNodes = element.nodeType == 1 ? element.childNodes : ko.virtualElements.childNodes(element),
jaroslav@1230:                     container = ko.utils.moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent
jaroslav@1230:                 new ko.templateSources.anonymousTemplate(element)['nodes'](container);
jaroslav@1230:             }
jaroslav@1230:             return { 'controlsDescendantBindings': true };
jaroslav@1230:         },
jaroslav@1230:         'update': function (element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
jaroslav@1230:             var templateName = ko.utils.unwrapObservable(valueAccessor()),
jaroslav@1230:                 options = {},
jaroslav@1230:                 shouldDisplay = true,
jaroslav@1230:                 dataValue,
jaroslav@1230:                 templateComputed = null;
jaroslav@1230: 
jaroslav@1230:             if (typeof templateName != "string") {
jaroslav@1230:                 options = templateName;
jaroslav@1230:                 templateName = options['name'];
jaroslav@1230: 
jaroslav@1230:                 // Support "if"/"ifnot" conditions
jaroslav@1230:                 if ('if' in options)
jaroslav@1230:                     shouldDisplay = ko.utils.unwrapObservable(options['if']);
jaroslav@1230:                 if (shouldDisplay && 'ifnot' in options)
jaroslav@1230:                     shouldDisplay = !ko.utils.unwrapObservable(options['ifnot']);
jaroslav@1230: 
jaroslav@1230:                 dataValue = ko.utils.unwrapObservable(options['data']);
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             if ('foreach' in options) {
jaroslav@1230:                 // Render once for each data point (treating data set as empty if shouldDisplay==false)
jaroslav@1230:                 var dataArray = (shouldDisplay && options['foreach']) || [];
jaroslav@1230:                 templateComputed = ko.renderTemplateForEach(templateName || element, dataArray, options, element, bindingContext);
jaroslav@1230:             } else if (!shouldDisplay) {
jaroslav@1230:                 ko.virtualElements.emptyNode(element);
jaroslav@1230:             } else {
jaroslav@1230:                 // Render once for this single data point (or use the viewModel if no data was provided)
jaroslav@1230:                 var innerBindingContext = ('data' in options) ?
jaroslav@1230:                     bindingContext['createChildContext'](dataValue, options['as']) :  // Given an explitit 'data' value, we create a child binding context for it
jaroslav@1230:                     bindingContext;                                                        // Given no explicit 'data' value, we retain the same binding context
jaroslav@1230:                 templateComputed = ko.renderTemplate(templateName || element, innerBindingContext, options, element);
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?)
jaroslav@1230:             disposeOldComputedAndStoreNewOne(element, templateComputed);
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     // Anonymous templates can't be rewritten. Give a nice error message if you try to do it.
jaroslav@1230:     ko.expressionRewriting.bindingRewriteValidators['template'] = function(bindingValue) {
jaroslav@1230:         var parsedBindingValue = ko.expressionRewriting.parseObjectLiteral(bindingValue);
jaroslav@1230: 
jaroslav@1230:         if ((parsedBindingValue.length == 1) && parsedBindingValue[0]['unknown'])
jaroslav@1230:             return null; // It looks like a string literal, not an object literal, so treat it as a named template (which is allowed for rewriting)
jaroslav@1230: 
jaroslav@1230:         if (ko.expressionRewriting.keyValueArrayContainsKey(parsedBindingValue, "name"))
jaroslav@1230:             return null; // Named templates can be rewritten, so return "no error"
jaroslav@1230:         return "This template engine does not support anonymous templates nested within its templates";
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.virtualElements.allowedBindings['template'] = true;
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('setTemplateEngine', ko.setTemplateEngine);
jaroslav@1230: ko.exportSymbol('renderTemplate', ko.renderTemplate);
jaroslav@1230: 
jaroslav@1230: ko.utils.compareArrays = (function () {
jaroslav@1230:     var statusNotInOld = 'added', statusNotInNew = 'deleted';
jaroslav@1230: 
jaroslav@1230:     // Simple calculation based on Levenshtein distance.
jaroslav@1230:     function compareArrays(oldArray, newArray, dontLimitMoves) {
jaroslav@1230:         oldArray = oldArray || [];
jaroslav@1230:         newArray = newArray || [];
jaroslav@1230: 
jaroslav@1230:         if (oldArray.length <= newArray.length)
jaroslav@1230:             return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, dontLimitMoves);
jaroslav@1230:         else
jaroslav@1230:             return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, dontLimitMoves);
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, dontLimitMoves) {
jaroslav@1230:         var myMin = Math.min,
jaroslav@1230:             myMax = Math.max,
jaroslav@1230:             editDistanceMatrix = [],
jaroslav@1230:             smlIndex, smlIndexMax = smlArray.length,
jaroslav@1230:             bigIndex, bigIndexMax = bigArray.length,
jaroslav@1230:             compareRange = (bigIndexMax - smlIndexMax) || 1,
jaroslav@1230:             maxDistance = smlIndexMax + bigIndexMax + 1,
jaroslav@1230:             thisRow, lastRow,
jaroslav@1230:             bigIndexMaxForRow, bigIndexMinForRow;
jaroslav@1230: 
jaroslav@1230:         for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {
jaroslav@1230:             lastRow = thisRow;
jaroslav@1230:             editDistanceMatrix.push(thisRow = []);
jaroslav@1230:             bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);
jaroslav@1230:             bigIndexMinForRow = myMax(0, smlIndex - 1);
jaroslav@1230:             for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {
jaroslav@1230:                 if (!bigIndex)
jaroslav@1230:                     thisRow[bigIndex] = smlIndex + 1;
jaroslav@1230:                 else if (!smlIndex)  // Top row - transform empty array into new array via additions
jaroslav@1230:                     thisRow[bigIndex] = bigIndex + 1;
jaroslav@1230:                 else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])
jaroslav@1230:                     thisRow[bigIndex] = lastRow[bigIndex - 1];                  // copy value (no edit)
jaroslav@1230:                 else {
jaroslav@1230:                     var northDistance = lastRow[bigIndex] || maxDistance;       // not in big (deletion)
jaroslav@1230:                     var westDistance = thisRow[bigIndex - 1] || maxDistance;    // not in small (addition)
jaroslav@1230:                     thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         var editScript = [], meMinusOne, notInSml = [], notInBig = [];
jaroslav@1230:         for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {
jaroslav@1230:             meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;
jaroslav@1230:             if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) {
jaroslav@1230:                 notInSml.push(editScript[editScript.length] = {     // added
jaroslav@1230:                     'status': statusNotInSml,
jaroslav@1230:                     'value': bigArray[--bigIndex],
jaroslav@1230:                     'index': bigIndex });
jaroslav@1230:             } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {
jaroslav@1230:                 notInBig.push(editScript[editScript.length] = {     // deleted
jaroslav@1230:                     'status': statusNotInBig,
jaroslav@1230:                     'value': smlArray[--smlIndex],
jaroslav@1230:                     'index': smlIndex });
jaroslav@1230:             } else {
jaroslav@1230:                 editScript.push({
jaroslav@1230:                     'status': "retained",
jaroslav@1230:                     'value': bigArray[--bigIndex] });
jaroslav@1230:                 --smlIndex;
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         if (notInSml.length && notInBig.length) {
jaroslav@1230:             // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of
jaroslav@1230:             // smlIndexMax keeps the time complexity of this algorithm linear.
jaroslav@1230:             var limitFailedCompares = smlIndexMax * 10, failedCompares,
jaroslav@1230:                 a, d, notInSmlItem, notInBigItem;
jaroslav@1230:             // Go through the items that have been added and deleted and try to find matches between them.
jaroslav@1230:             for (failedCompares = a = 0; (dontLimitMoves || failedCompares < limitFailedCompares) && (notInSmlItem = notInSml[a]); a++) {
jaroslav@1230:                 for (d = 0; notInBigItem = notInBig[d]; d++) {
jaroslav@1230:                     if (notInSmlItem['value'] === notInBigItem['value']) {
jaroslav@1230:                         notInSmlItem['moved'] = notInBigItem['index'];
jaroslav@1230:                         notInBigItem['moved'] = notInSmlItem['index'];
jaroslav@1230:                         notInBig.splice(d,1);       // This item is marked as moved; so remove it from notInBig list
jaroslav@1230:                         failedCompares = d = 0;     // Reset failed compares count because we're checking for consecutive failures
jaroslav@1230:                         break;
jaroslav@1230:                     }
jaroslav@1230:                 }
jaroslav@1230:                 failedCompares += d;
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230:         return editScript.reverse();
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     return compareArrays;
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('utils.compareArrays', ko.utils.compareArrays);
jaroslav@1230: 
jaroslav@1230: (function () {
jaroslav@1230:     // Objective:
jaroslav@1230:     // * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,
jaroslav@1230:     //   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node
jaroslav@1230:     // * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node
jaroslav@1230:     //   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
jaroslav@1230:     //   previously mapped - retain those nodes, and just insert/delete other ones
jaroslav@1230: 
jaroslav@1230:     // "callbackAfterAddingNodes" will be invoked after any "mapping"-generated nodes are inserted into the container node
jaroslav@1230:     // You can use this, for example, to activate bindings on those nodes.
jaroslav@1230: 
jaroslav@1230:     function fixUpNodesToBeMovedOrRemoved(contiguousNodeArray) {
jaroslav@1230:         // Before moving, deleting, or replacing a set of nodes that were previously outputted by the "map" function, we have to reconcile
jaroslav@1230:         // them against what is in the DOM right now. It may be that some of the nodes have already been removed from the document,
jaroslav@1230:         // or that new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been
jaroslav@1230:         // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.
jaroslav@1230:         // So, this function translates the old "map" output array into its best guess of what set of current DOM nodes should be removed.
jaroslav@1230:         //
jaroslav@1230:         // Rules:
jaroslav@1230:         //   [A] Any leading nodes that aren't in the document any more should be ignored
jaroslav@1230:         //       These most likely correspond to memoization nodes that were already removed during binding
jaroslav@1230:         //       See https://github.com/SteveSanderson/knockout/pull/440
jaroslav@1230:         //   [B] We want to output a contiguous series of nodes that are still in the document. So, ignore any nodes that
jaroslav@1230:         //       have already been removed, and include any nodes that have been inserted among the previous collection
jaroslav@1230: 
jaroslav@1230:         // Rule [A]
jaroslav@1230:         while (contiguousNodeArray.length && !ko.utils.domNodeIsAttachedToDocument(contiguousNodeArray[0]))
jaroslav@1230:             contiguousNodeArray.splice(0, 1);
jaroslav@1230: 
jaroslav@1230:         // Rule [B]
jaroslav@1230:         if (contiguousNodeArray.length > 1) {
jaroslav@1230:             // Build up the actual new contiguous node set
jaroslav@1230:             var current = contiguousNodeArray[0], last = contiguousNodeArray[contiguousNodeArray.length - 1], newContiguousSet = [current];
jaroslav@1230:             while (current !== last) {
jaroslav@1230:                 current = current.nextSibling;
jaroslav@1230:                 if (!current) // Won't happen, except if the developer has manually removed some DOM elements (then we're in an undefined scenario)
jaroslav@1230:                     return;
jaroslav@1230:                 newContiguousSet.push(current);
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             // ... then mutate the input array to match this.
jaroslav@1230:             // (The following line replaces the contents of contiguousNodeArray with newContiguousSet)
jaroslav@1230:             Array.prototype.splice.apply(contiguousNodeArray, [0, contiguousNodeArray.length].concat(newContiguousSet));
jaroslav@1230:         }
jaroslav@1230:         return contiguousNodeArray;
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     function mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {
jaroslav@1230:         // Map this array value inside a dependentObservable so we re-map when any dependency changes
jaroslav@1230:         var mappedNodes = [];
jaroslav@1230:         var dependentObservable = ko.dependentObservable(function() {
jaroslav@1230:             var newMappedNodes = mapping(valueToMap, index) || [];
jaroslav@1230: 
jaroslav@1230:             // On subsequent evaluations, just replace the previously-inserted DOM nodes
jaroslav@1230:             if (mappedNodes.length > 0) {
jaroslav@1230:                 ko.utils.replaceDomNodes(fixUpNodesToBeMovedOrRemoved(mappedNodes), newMappedNodes);
jaroslav@1230:                 if (callbackAfterAddingNodes)
jaroslav@1230:                     ko.dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             // Replace the contents of the mappedNodes array, thereby updating the record
jaroslav@1230:             // of which nodes would be deleted if valueToMap was itself later removed
jaroslav@1230:             mappedNodes.splice(0, mappedNodes.length);
jaroslav@1230:             ko.utils.arrayPushAll(mappedNodes, newMappedNodes);
jaroslav@1230:         }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function() { return (mappedNodes.length == 0) || !ko.utils.domNodeIsAttachedToDocument(mappedNodes[0]) } });
jaroslav@1230:         return { mappedNodes : mappedNodes, dependentObservable : (dependentObservable.isActive() ? dependentObservable : undefined) };
jaroslav@1230:     }
jaroslav@1230: 
jaroslav@1230:     var lastMappingResultDomDataKey = "setDomNodeChildrenFromArrayMapping_lastMappingResult";
jaroslav@1230: 
jaroslav@1230:     ko.utils.setDomNodeChildrenFromArrayMapping = function (domNode, array, mapping, options, callbackAfterAddingNodes) {
jaroslav@1230:         // Compare the provided array against the previous one
jaroslav@1230:         array = array || [];
jaroslav@1230:         options = options || {};
jaroslav@1230:         var isFirstExecution = ko.utils.domData.get(domNode, lastMappingResultDomDataKey) === undefined;
jaroslav@1230:         var lastMappingResult = ko.utils.domData.get(domNode, lastMappingResultDomDataKey) || [];
jaroslav@1230:         var lastArray = ko.utils.arrayMap(lastMappingResult, function (x) { return x.arrayEntry; });
jaroslav@1230:         var editScript = ko.utils.compareArrays(lastArray, array);
jaroslav@1230: 
jaroslav@1230:         // Build the new mapping result
jaroslav@1230:         var newMappingResult = [];
jaroslav@1230:         var lastMappingResultIndex = 0;
jaroslav@1230:         var newMappingResultIndex = 0;
jaroslav@1230: 
jaroslav@1230:         var nodesToDelete = [];
jaroslav@1230:         var itemsToProcess = [];
jaroslav@1230:         var itemsForBeforeRemoveCallbacks = [];
jaroslav@1230:         var itemsForMoveCallbacks = [];
jaroslav@1230:         var itemsForAfterAddCallbacks = [];
jaroslav@1230:         var mapData;
jaroslav@1230: 
jaroslav@1230:         function itemMovedOrRetained(editScriptIndex, oldPosition) {
jaroslav@1230:             mapData = lastMappingResult[oldPosition];
jaroslav@1230:             if (newMappingResultIndex !== oldPosition)
jaroslav@1230:                 itemsForMoveCallbacks[editScriptIndex] = mapData;
jaroslav@1230:             // Since updating the index might change the nodes, do so before calling fixUpNodesToBeMovedOrRemoved
jaroslav@1230:             mapData.indexObservable(newMappingResultIndex++);
jaroslav@1230:             fixUpNodesToBeMovedOrRemoved(mapData.mappedNodes);
jaroslav@1230:             newMappingResult.push(mapData);
jaroslav@1230:             itemsToProcess.push(mapData);
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         function callCallback(callback, items) {
jaroslav@1230:             if (callback) {
jaroslav@1230:                 for (var i = 0, n = items.length; i < n; i++) {
jaroslav@1230:                     if (items[i]) {
jaroslav@1230:                         ko.utils.arrayForEach(items[i].mappedNodes, function(node) {
jaroslav@1230:                             callback(node, i, items[i].arrayEntry);
jaroslav@1230:                         });
jaroslav@1230:                     }
jaroslav@1230:                 }
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         for (var i = 0, editScriptItem, movedIndex; editScriptItem = editScript[i]; i++) {
jaroslav@1230:             movedIndex = editScriptItem['moved'];
jaroslav@1230:             switch (editScriptItem['status']) {
jaroslav@1230:                 case "deleted":
jaroslav@1230:                     if (movedIndex === undefined) {
jaroslav@1230:                         mapData = lastMappingResult[lastMappingResultIndex];
jaroslav@1230: 
jaroslav@1230:                         // Stop tracking changes to the mapping for these nodes
jaroslav@1230:                         if (mapData.dependentObservable)
jaroslav@1230:                             mapData.dependentObservable.dispose();
jaroslav@1230: 
jaroslav@1230:                         // Queue these nodes for later removal
jaroslav@1230:                         nodesToDelete.push.apply(nodesToDelete, fixUpNodesToBeMovedOrRemoved(mapData.mappedNodes));
jaroslav@1230:                         if (options['beforeRemove']) {
jaroslav@1230:                             itemsForBeforeRemoveCallbacks[i] = mapData;
jaroslav@1230:                             itemsToProcess.push(mapData);
jaroslav@1230:                         }
jaroslav@1230:                     }
jaroslav@1230:                     lastMappingResultIndex++;
jaroslav@1230:                     break;
jaroslav@1230: 
jaroslav@1230:                 case "retained":
jaroslav@1230:                     itemMovedOrRetained(i, lastMappingResultIndex++);
jaroslav@1230:                     break;
jaroslav@1230: 
jaroslav@1230:                 case "added":
jaroslav@1230:                     if (movedIndex !== undefined) {
jaroslav@1230:                         itemMovedOrRetained(i, movedIndex);
jaroslav@1230:                     } else {
jaroslav@1230:                         mapData = { arrayEntry: editScriptItem['value'], indexObservable: ko.observable(newMappingResultIndex++) };
jaroslav@1230:                         newMappingResult.push(mapData);
jaroslav@1230:                         itemsToProcess.push(mapData);
jaroslav@1230:                         if (!isFirstExecution)
jaroslav@1230:                             itemsForAfterAddCallbacks[i] = mapData;
jaroslav@1230:                     }
jaroslav@1230:                     break;
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         // Call beforeMove first before any changes have been made to the DOM
jaroslav@1230:         callCallback(options['beforeMove'], itemsForMoveCallbacks);
jaroslav@1230: 
jaroslav@1230:         // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)
jaroslav@1230:         ko.utils.arrayForEach(nodesToDelete, options['beforeRemove'] ? ko.cleanNode : ko.removeNode);
jaroslav@1230: 
jaroslav@1230:         // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)
jaroslav@1230:         for (var i = 0, nextNode = ko.virtualElements.firstChild(domNode), lastNode, node; mapData = itemsToProcess[i]; i++) {
jaroslav@1230:             // Get nodes for newly added items
jaroslav@1230:             if (!mapData.mappedNodes)
jaroslav@1230:                 ko.utils.extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));
jaroslav@1230: 
jaroslav@1230:             // Put nodes in the right place if they aren't there already
jaroslav@1230:             for (var j = 0; node = mapData.mappedNodes[j]; nextNode = node.nextSibling, lastNode = node, j++) {
jaroslav@1230:                 if (node !== nextNode)
jaroslav@1230:                     ko.virtualElements.insertAfter(domNode, node, lastNode);
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)
jaroslav@1230:             if (!mapData.initialized && callbackAfterAddingNodes) {
jaroslav@1230:                 callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);
jaroslav@1230:                 mapData.initialized = true;
jaroslav@1230:             }
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         // If there's a beforeRemove callback, call it after reordering.
jaroslav@1230:         // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using
jaroslav@1230:         // some sort of animation, which is why we first reorder the nodes that will be removed. If the
jaroslav@1230:         // callback instead removes the nodes right away, it would be more efficient to skip reordering them.
jaroslav@1230:         // Perhaps we'll make that change in the future if this scenario becomes more common.
jaroslav@1230:         callCallback(options['beforeRemove'], itemsForBeforeRemoveCallbacks);
jaroslav@1230: 
jaroslav@1230:         // Finally call afterMove and afterAdd callbacks
jaroslav@1230:         callCallback(options['afterMove'], itemsForMoveCallbacks);
jaroslav@1230:         callCallback(options['afterAdd'], itemsForAfterAddCallbacks);
jaroslav@1230: 
jaroslav@1230:         // Store a copy of the array items we just considered so we can difference it next time
jaroslav@1230:         ko.utils.domData.set(domNode, lastMappingResultDomDataKey, newMappingResult);
jaroslav@1230:     }
jaroslav@1230: })();
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('utils.setDomNodeChildrenFromArrayMapping', ko.utils.setDomNodeChildrenFromArrayMapping);
jaroslav@1230: ko.nativeTemplateEngine = function () {
jaroslav@1230:     this['allowTemplateRewriting'] = false;
jaroslav@1230: }
jaroslav@1230: 
jaroslav@1230: ko.nativeTemplateEngine.prototype = new ko.templateEngine();
jaroslav@1230: ko.nativeTemplateEngine.prototype['renderTemplateSource'] = function (templateSource, bindingContext, options) {
jaroslav@1230:     var useNodesIfAvailable = !(ko.utils.ieVersion < 9), // IE<9 cloneNode doesn't work properly
jaroslav@1230:         templateNodesFunc = useNodesIfAvailable ? templateSource['nodes'] : null,
jaroslav@1230:         templateNodes = templateNodesFunc ? templateSource['nodes']() : null;
jaroslav@1230: 
jaroslav@1230:     if (templateNodes) {
jaroslav@1230:         return ko.utils.makeArray(templateNodes.cloneNode(true).childNodes);
jaroslav@1230:     } else {
jaroslav@1230:         var templateText = templateSource['text']();
jaroslav@1230:         return ko.utils.parseHtmlFragment(templateText);
jaroslav@1230:     }
jaroslav@1230: };
jaroslav@1230: 
jaroslav@1230: ko.nativeTemplateEngine.instance = new ko.nativeTemplateEngine();
jaroslav@1230: ko.setTemplateEngine(ko.nativeTemplateEngine.instance);
jaroslav@1230: 
jaroslav@1230: ko.exportSymbol('nativeTemplateEngine', ko.nativeTemplateEngine);
jaroslav@1230: (function() {
jaroslav@1230:     ko.jqueryTmplTemplateEngine = function () {
jaroslav@1230:         // Detect which version of jquery-tmpl you're using. Unfortunately jquery-tmpl
jaroslav@1230:         // doesn't expose a version number, so we have to infer it.
jaroslav@1230:         // Note that as of Knockout 1.3, we only support jQuery.tmpl 1.0.0pre and later,
jaroslav@1230:         // which KO internally refers to as version "2", so older versions are no longer detected.
jaroslav@1230:         var jQueryTmplVersion = this.jQueryTmplVersion = (function() {
jaroslav@1230:             if ((typeof(jQuery) == "undefined") || !(jQuery['tmpl']))
jaroslav@1230:                 return 0;
jaroslav@1230:             // Since it exposes no official version number, we use our own numbering system. To be updated as jquery-tmpl evolves.
jaroslav@1230:             try {
jaroslav@1230:                 if (jQuery['tmpl']['tag']['tmpl']['open'].toString().indexOf('__') >= 0) {
jaroslav@1230:                     // Since 1.0.0pre, custom tags should append markup to an array called "__"
jaroslav@1230:                     return 2; // Final version of jquery.tmpl
jaroslav@1230:                 }
jaroslav@1230:             } catch(ex) { /* Apparently not the version we were looking for */ }
jaroslav@1230: 
jaroslav@1230:             return 1; // Any older version that we don't support
jaroslav@1230:         })();
jaroslav@1230: 
jaroslav@1230:         function ensureHasReferencedJQueryTemplates() {
jaroslav@1230:             if (jQueryTmplVersion < 2)
jaroslav@1230:                 throw new Error("Your version of jQuery.tmpl is too old. Please upgrade to jQuery.tmpl 1.0.0pre or later.");
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         function executeTemplate(compiledTemplate, data, jQueryTemplateOptions) {
jaroslav@1230:             return jQuery['tmpl'](compiledTemplate, data, jQueryTemplateOptions);
jaroslav@1230:         }
jaroslav@1230: 
jaroslav@1230:         this['renderTemplateSource'] = function(templateSource, bindingContext, options) {
jaroslav@1230:             options = options || {};
jaroslav@1230:             ensureHasReferencedJQueryTemplates();
jaroslav@1230: 
jaroslav@1230:             // Ensure we have stored a precompiled version of this template (don't want to reparse on every render)
jaroslav@1230:             var precompiled = templateSource['data']('precompiled');
jaroslav@1230:             if (!precompiled) {
jaroslav@1230:                 var templateText = templateSource['text']() || "";
jaroslav@1230:                 // Wrap in "with($whatever.koBindingContext) { ... }"
jaroslav@1230:                 templateText = "{{ko_with $item.koBindingContext}}" + templateText + "{{/ko_with}}";
jaroslav@1230: 
jaroslav@1230:                 precompiled = jQuery['template'](null, templateText);
jaroslav@1230:                 templateSource['data']('precompiled', precompiled);
jaroslav@1230:             }
jaroslav@1230: 
jaroslav@1230:             var data = [bindingContext['$data']]; // Prewrap the data in an array to stop jquery.tmpl from trying to unwrap any arrays
jaroslav@1230:             var jQueryTemplateOptions = jQuery['extend']({ 'koBindingContext': bindingContext }, options['templateOptions']);
jaroslav@1230: 
jaroslav@1230:             var resultNodes = executeTemplate(precompiled, data, jQueryTemplateOptions);
jaroslav@1230:             resultNodes['appendTo'](document.createElement("div")); // Using "appendTo" forces jQuery/jQuery.tmpl to perform necessary cleanup work
jaroslav@1230: 
jaroslav@1230:             jQuery['fragments'] = {}; // Clear jQuery's fragment cache to avoid a memory leak after a large number of template renders
jaroslav@1230:             return resultNodes;
jaroslav@1230:         };
jaroslav@1230: 
jaroslav@1230:         this['createJavaScriptEvaluatorBlock'] = function(script) {
jaroslav@1230:             return "{{ko_code ((function() { return " + script + " })()) }}";
jaroslav@1230:         };
jaroslav@1230: 
jaroslav@1230:         this['addTemplate'] = function(templateName, templateMarkup) {
jaroslav@1230:             document.write("<script type='text/html' id='" + templateName + "'>" + templateMarkup + "</script>");
jaroslav@1230:         };
jaroslav@1230: 
jaroslav@1230:         if (jQueryTmplVersion > 0) {
jaroslav@1230:             jQuery['tmpl']['tag']['ko_code'] = {
jaroslav@1230:                 open: "__.push($1 || '');"
jaroslav@1230:             };
jaroslav@1230:             jQuery['tmpl']['tag']['ko_with'] = {
jaroslav@1230:                 open: "with($1) {",
jaroslav@1230:                 close: "} "
jaroslav@1230:             };
jaroslav@1230:         }
jaroslav@1230:     };
jaroslav@1230: 
jaroslav@1230:     ko.jqueryTmplTemplateEngine.prototype = new ko.templateEngine();
jaroslav@1230: 
jaroslav@1230:     // Use this one by default *only if jquery.tmpl is referenced*
jaroslav@1230:     var jqueryTmplTemplateEngineInstance = new ko.jqueryTmplTemplateEngine();
jaroslav@1230:     if (jqueryTmplTemplateEngineInstance.jQueryTmplVersion > 0)
jaroslav@1230:         ko.setTemplateEngine(jqueryTmplTemplateEngineInstance);
jaroslav@1230: 
jaroslav@1230:     ko.exportSymbol('jqueryTmplTemplateEngine', ko.jqueryTmplTemplateEngine);
jaroslav@1230: })();
jaroslav@1230: });
jaroslav@1230: })(window,document,navigator,window["jQuery"]);
jaroslav@1230: })();