Clone 3.5.1 from github

vendors/knockout/src/binding/bindingAttributeSyntax.js

@@ -0,0 +1,608 @@
+(function () {
+    // Hide or don't minify context properties, see https://github.com/knockout/knockout/issues/2294
+    var contextSubscribable = ko.utils.createSymbolOrString('_subscribable');
+    var contextAncestorBindingInfo = ko.utils.createSymbolOrString('_ancestorBindingInfo');
+    var contextDataDependency = ko.utils.createSymbolOrString('_dataDependency');
+
+    ko.bindingHandlers = {};
+
+    // The following element types will not be recursed into during binding.
+    var bindingDoesNotRecurseIntoElementTypes = {
+        // Don't want bindings that operate on text nodes to mutate <script> and <textarea> contents,
+        // because it's unexpected and a potential XSS issue.
+        // Also bindings should not operate on <template> elements since this breaks in Internet Explorer
+        // and because such elements' contents are always intended to be bound in a different context
+        // from where they appear in the document.
+        'script': true,
+        'textarea': true,
+        'template': true
+    };
+
+    // Use an overridable method for retrieving binding handlers so that plugins may support dynamically created handlers
+    ko['getBindingHandler'] = function(bindingKey) {
+        return ko.bindingHandlers[bindingKey];
+    };
+
+    var inheritParentVm = {};
+
+    // The ko.bindingContext constructor is only called directly to create the root context. For child
+    // contexts, use bindingContext.createChildContext or bindingContext.extend.
+    ko.bindingContext = function(dataItemOrAccessor, parentContext, dataItemAlias, extendCallback, options) {
+
+        // The binding context object includes static properties for the current, parent, and root view models.
+        // If a view model is actually stored in an observable, the corresponding binding context object, and
+        // any child contexts, must be updated when the view model is changed.
+        function updateContext() {
+            // Most of the time, the context will directly get a view model object, but if a function is given,
+            // we call the function to retrieve the view model. If the function accesses any observables or returns
+            // an observable, the dependency is tracked, and those observables can later cause the binding
+            // context to be updated.
+            var dataItemOrObservable = isFunc ? realDataItemOrAccessor() : realDataItemOrAccessor,
+                dataItem = ko.utils.unwrapObservable(dataItemOrObservable);
+
+            if (parentContext) {
+                // Copy $root and any custom properties from the parent context
+                ko.utils.extend(self, parentContext);
+
+                // Copy Symbol properties
+                if (contextAncestorBindingInfo in parentContext) {
+                    self[contextAncestorBindingInfo] = parentContext[contextAncestorBindingInfo];
+                }
+            } else {
+                self['$parents'] = [];
+                self['$root'] = dataItem;
+
+                // Export 'ko' in the binding context so it will be available in bindings and templates
+                // even if 'ko' isn't exported as a global, such as when using an AMD loader.
+                // See https://github.com/SteveSanderson/knockout/issues/490
+                self['ko'] = ko;
+            }
+
+            self[contextSubscribable] = subscribable;
+
+            if (shouldInheritData) {
+                dataItem = self['$data'];
+            } else {
+                self['$rawData'] = dataItemOrObservable;
+                self['$data'] = dataItem;
+            }
+
+            if (dataItemAlias)
+                self[dataItemAlias] = dataItem;
+
+            // The extendCallback function is provided when creating a child context or extending a context.
+            // It handles the specific actions needed to finish setting up the binding context. Actions in this
+            // function could also add dependencies to this binding context.
+            if (extendCallback)
+                extendCallback(self, parentContext, dataItem);
+
+            // When a "parent" context is given and we don't already have a dependency on its context, register a dependency on it.
+            // Thus whenever the parent context is updated, this context will also be updated.
+            if (parentContext && parentContext[contextSubscribable] && !ko.computedContext.computed().hasAncestorDependency(parentContext[contextSubscribable])) {
+                parentContext[contextSubscribable]();
+            }
+
+            if (dataDependency) {
+                self[contextDataDependency] = dataDependency;
+            }
+
+            return self['$data'];
+        }
+
+        var self = this,
+            shouldInheritData = dataItemOrAccessor === inheritParentVm,
+            realDataItemOrAccessor = shouldInheritData ? undefined : dataItemOrAccessor,
+            isFunc = typeof(realDataItemOrAccessor) == "function" && !ko.isObservable(realDataItemOrAccessor),
+            nodes,
+            subscribable,
+            dataDependency = options && options['dataDependency'];
+
+        if (options && options['exportDependencies']) {
+            // The "exportDependencies" option means that the calling code will track any dependencies and re-create
+            // the binding context when they change.
+            updateContext();
+        } else {
+            subscribable = ko.pureComputed(updateContext);
+            subscribable.peek();
+
+            // At this point, the binding context has been initialized, and the "subscribable" computed observable is
+            // subscribed to any observables that were accessed in the process. If there is nothing to track, the
+            // computed will be inactive, and we can safely throw it away. If it's active, the computed is stored in
+            // the context object.
+            if (subscribable.isActive()) {
+                // Always notify because even if the model ($data) hasn't changed, other context properties might have changed
+                subscribable['equalityComparer'] = null;
+            } else {
+                self[contextSubscribable] = undefined;
+            }
+        }
+    }
+
+    // Extend the binding context hierarchy with a new view model object. If the parent context is watching
+    // any observables, the new child context will automatically get a dependency on the parent context.
+    // But this does not mean that the $data value of the child context will also get updated. If the child
+    // view model also depends on the parent view model, you must provide a function that returns the correct
+    // view model on each update.
+    ko.bindingContext.prototype['createChildContext'] = function (dataItemOrAccessor, dataItemAlias, extendCallback, options) {
+        if (!options && dataItemAlias && typeof dataItemAlias == "object") {
+            options = dataItemAlias;
+            dataItemAlias = options['as'];
+            extendCallback = options['extend'];
+        }
+
+        if (dataItemAlias && options && options['noChildContext']) {
+            var isFunc = typeof(dataItemOrAccessor) == "function" && !ko.isObservable(dataItemOrAccessor);
+            return new ko.bindingContext(inheritParentVm, this, null, function (self) {
+                if (extendCallback)
+                    extendCallback(self);
+                self[dataItemAlias] = isFunc ? dataItemOrAccessor() : dataItemOrAccessor;
+            }, options);
+        }
+
+        return new ko.bindingContext(dataItemOrAccessor, this, dataItemAlias, function (self, parentContext) {
+            // Extend the context hierarchy by setting the appropriate pointers
+            self['$parentContext'] = parentContext;
+            self['$parent'] = parentContext['$data'];
+            self['$parents'] = (parentContext['$parents'] || []).slice(0);
+            self['$parents'].unshift(self['$parent']);
+            if (extendCallback)
+                extendCallback(self);
+        }, options);
+    };
+
+    // Extend the binding context with new custom properties. This doesn't change the context hierarchy.
+    // Similarly to "child" contexts, provide a function here to make sure that the correct values are set
+    // when an observable view model is updated.
+    ko.bindingContext.prototype['extend'] = function(properties, options) {
+        return new ko.bindingContext(inheritParentVm, this, null, function(self, parentContext) {
+            ko.utils.extend(self, typeof(properties) == "function" ? properties(self) : properties);
+        }, options);
+    };
+
+    var boundElementDomDataKey = ko.utils.domData.nextKey();
+
+    function asyncContextDispose(node) {
+        var bindingInfo = ko.utils.domData.get(node, boundElementDomDataKey),
+            asyncContext = bindingInfo && bindingInfo.asyncContext;
+        if (asyncContext) {
+            bindingInfo.asyncContext = null;
+            asyncContext.notifyAncestor();
+        }
+    }
+    function AsyncCompleteContext(node, bindingInfo, ancestorBindingInfo) {
+        this.node = node;
+        this.bindingInfo = bindingInfo;
+        this.asyncDescendants = [];
+        this.childrenComplete = false;
+
+        if (!bindingInfo.asyncContext) {
+            ko.utils.domNodeDisposal.addDisposeCallback(node, asyncContextDispose);
+        }
+
+        if (ancestorBindingInfo && ancestorBindingInfo.asyncContext) {
+            ancestorBindingInfo.asyncContext.asyncDescendants.push(node);
+            this.ancestorBindingInfo = ancestorBindingInfo;
+        }
+    }
+    AsyncCompleteContext.prototype.notifyAncestor = function () {
+        if (this.ancestorBindingInfo && this.ancestorBindingInfo.asyncContext) {
+            this.ancestorBindingInfo.asyncContext.descendantComplete(this.node);
+        }
+    };
+    AsyncCompleteContext.prototype.descendantComplete = function (node) {
+        ko.utils.arrayRemoveItem(this.asyncDescendants, node);
+        if (!this.asyncDescendants.length && this.childrenComplete) {
+            this.completeChildren();
+        }
+    };
+    AsyncCompleteContext.prototype.completeChildren = function () {
+        this.childrenComplete = true;
+        if (this.bindingInfo.asyncContext && !this.asyncDescendants.length) {
+            this.bindingInfo.asyncContext = null;
+            ko.utils.domNodeDisposal.removeDisposeCallback(this.node, asyncContextDispose);
+            ko.bindingEvent.notify(this.node, ko.bindingEvent.descendantsComplete);
+            this.notifyAncestor();
+        }
+    };
+
+    ko.bindingEvent = {
+        childrenComplete: "childrenComplete",
+        descendantsComplete : "descendantsComplete",
+
+        subscribe: function (node, event, callback, context, options) {
+            var bindingInfo = ko.utils.domData.getOrSet(node, boundElementDomDataKey, {});
+            if (!bindingInfo.eventSubscribable) {
+                bindingInfo.eventSubscribable = new ko.subscribable;
+            }
+            if (options && options['notifyImmediately'] && bindingInfo.notifiedEvents[event]) {
+                ko.dependencyDetection.ignore(callback, context, [node]);
+            }
+            return bindingInfo.eventSubscribable.subscribe(callback, context, event);
+        },
+
+        notify: function (node, event) {
+            var bindingInfo = ko.utils.domData.get(node, boundElementDomDataKey);
+            if (bindingInfo) {
+                bindingInfo.notifiedEvents[event] = true;
+                if (bindingInfo.eventSubscribable) {
+                    bindingInfo.eventSubscribable['notifySubscribers'](node, event);
+                }
+                if (event == ko.bindingEvent.childrenComplete) {
+                    if (bindingInfo.asyncContext) {
+                        bindingInfo.asyncContext.completeChildren();
+                    } else if (bindingInfo.asyncContext === undefined && bindingInfo.eventSubscribable && bindingInfo.eventSubscribable.hasSubscriptionsForEvent(ko.bindingEvent.descendantsComplete)) {
+                        // It's currently an error to register a descendantsComplete handler for a node that was never registered as completing asynchronously.
+                        // That's because without the asyncContext, we don't have a way to know that all descendants have completed.
+                        throw new Error("descendantsComplete event not supported for bindings on this node");
+                    }
+                }
+            }
+        },
+
+        startPossiblyAsyncContentBinding: function (node, bindingContext) {
+            var bindingInfo = ko.utils.domData.getOrSet(node, boundElementDomDataKey, {});
+
+            if (!bindingInfo.asyncContext) {
+                bindingInfo.asyncContext = new AsyncCompleteContext(node, bindingInfo, bindingContext[contextAncestorBindingInfo]);
+            }
+
+            // If the provided context was already extended with this node's binding info, just return the extended context
+            if (bindingContext[contextAncestorBindingInfo] == bindingInfo) {
+                return bindingContext;
+            }
+
+            return bindingContext['extend'](function (ctx) {
+                ctx[contextAncestorBindingInfo] = bindingInfo;
+            });
+        }
+    };
+
+    // Returns the valueAccessor function for a binding value
+    function makeValueAccessor(value) {
+        return function() {
+            return value;
+        };
+    }
+
+    // Returns the value of a valueAccessor function
+    function evaluateValueAccessor(valueAccessor) {
+        return valueAccessor();
+    }
+
+    // Given a function that returns bindings, create and return a new object that contains
+    // binding value-accessors functions. Each accessor function calls the original function
+    // so that it always gets the latest value and all dependencies are captured. This is used
+    // by ko.applyBindingsToNode and getBindingsAndMakeAccessors.
+    function makeAccessorsFromFunction(callback) {
+        return ko.utils.objectMap(ko.dependencyDetection.ignore(callback), function(value, key) {
+            return function() {
+                return callback()[key];
+            };
+        });
+    }
+
+    // Given a bindings function or object, create and return a new object that contains
+    // binding value-accessors functions. This is used by ko.applyBindingsToNode.
+    function makeBindingAccessors(bindings, context, node) {
+        if (typeof bindings === 'function') {
+            return makeAccessorsFromFunction(bindings.bind(null, context, node));
+        } else {
+            return ko.utils.objectMap(bindings, makeValueAccessor);
+        }
+    }
+
+    // This function is used if the binding provider doesn't include a getBindingAccessors function.
+    // It must be called with 'this' set to the provider instance.
+    function getBindingsAndMakeAccessors(node, context) {
+        return makeAccessorsFromFunction(this['getBindings'].bind(this, node, context));
+    }
+
+    function validateThatBindingIsAllowedForVirtualElements(bindingName) {
+        var validator = ko.virtualElements.allowedBindings[bindingName];
+        if (!validator)
+            throw new Error("The binding '" + bindingName + "' cannot be used with virtual elements")
+    }
+
+    function applyBindingsToDescendantsInternal(bindingContext, elementOrVirtualElement) {
+        var nextInQueue = ko.virtualElements.firstChild(elementOrVirtualElement);
+
+        if (nextInQueue) {
+            var currentChild,
+                provider = ko.bindingProvider['instance'],
+                preprocessNode = provider['preprocessNode'];
+
+            // Preprocessing allows a binding provider to mutate a node before bindings are applied to it. For example it's
+            // possible to insert new siblings after it, and/or replace the node with a different one. This can be used to
+            // implement custom binding syntaxes, such as {{ value }} for string interpolation, or custom element types that
+            // trigger insertion of <template> contents at that point in the document.
+            if (preprocessNode) {
+                while (currentChild = nextInQueue) {
+                    nextInQueue = ko.virtualElements.nextSibling(currentChild);
+                    preprocessNode.call(provider, currentChild);
+                }
+                // Reset nextInQueue for the next loop
+                nextInQueue = ko.virtualElements.firstChild(elementOrVirtualElement);
+            }
+
+            while (currentChild = nextInQueue) {
+                // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position
+                nextInQueue = ko.virtualElements.nextSibling(currentChild);
+                applyBindingsToNodeAndDescendantsInternal(bindingContext, currentChild);
+            }
+        }
+        ko.bindingEvent.notify(elementOrVirtualElement, ko.bindingEvent.childrenComplete);
+    }
+
+    function applyBindingsToNodeAndDescendantsInternal(bindingContext, nodeVerified) {
+        var bindingContextForDescendants = bindingContext;
+
+        var isElement = (nodeVerified.nodeType === 1);
+        if (isElement) // Workaround IE <= 8 HTML parsing weirdness
+            ko.virtualElements.normaliseVirtualElementDomStructure(nodeVerified);
+
+        // Perf optimisation: Apply bindings only if...
+        // (1) We need to store the binding info for the node (all element nodes)
+        // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)
+        var shouldApplyBindings = isElement || ko.bindingProvider['instance']['nodeHasBindings'](nodeVerified);
+        if (shouldApplyBindings)
+            bindingContextForDescendants = applyBindingsToNodeInternal(nodeVerified, null, bindingContext)['bindingContextForDescendants'];
+
+        if (bindingContextForDescendants && !bindingDoesNotRecurseIntoElementTypes[ko.utils.tagNameLower(nodeVerified)]) {
+            applyBindingsToDescendantsInternal(bindingContextForDescendants, nodeVerified);
+        }
+    }
+
+    function topologicalSortBindings(bindings) {
+        // Depth-first sort
+        var result = [],                // The list of key/handler pairs that we will return
+            bindingsConsidered = {},    // A temporary record of which bindings are already in 'result'
+            cyclicDependencyStack = []; // Keeps track of a depth-search so that, if there's a cycle, we know which bindings caused it
+        ko.utils.objectForEach(bindings, function pushBinding(bindingKey) {
+            if (!bindingsConsidered[bindingKey]) {
+                var binding = ko['getBindingHandler'](bindingKey);
+                if (binding) {
+                    // First add dependencies (if any) of the current binding
+                    if (binding['after']) {
+                        cyclicDependencyStack.push(bindingKey);
+                        ko.utils.arrayForEach(binding['after'], function(bindingDependencyKey) {
+                            if (bindings[bindingDependencyKey]) {
+                                if (ko.utils.arrayIndexOf(cyclicDependencyStack, bindingDependencyKey) !== -1) {
+                                    throw Error("Cannot combine the following bindings, because they have a cyclic dependency: " + cyclicDependencyStack.join(", "));
+                                } else {
+                                    pushBinding(bindingDependencyKey);
+                                }
+                            }
+                        });
+                        cyclicDependencyStack.length--;
+                    }
+                    // Next add the current binding
+                    result.push({ key: bindingKey, handler: binding });
+                }
+                bindingsConsidered[bindingKey] = true;
+            }
+        });
+
+        return result;
+    }
+
+    function applyBindingsToNodeInternal(node, sourceBindings, bindingContext) {
+        var bindingInfo = ko.utils.domData.getOrSet(node, boundElementDomDataKey, {});
+
+        // Prevent multiple applyBindings calls for the same node, except when a binding value is specified
+        var alreadyBound = bindingInfo.alreadyBound;
+        if (!sourceBindings) {
+            if (alreadyBound) {
+                throw Error("You cannot apply bindings multiple times to the same element.");
+            }
+            bindingInfo.alreadyBound = true;
+        }
+        if (!alreadyBound) {
+            bindingInfo.context = bindingContext;
+        }
+        if (!bindingInfo.notifiedEvents) {
+            bindingInfo.notifiedEvents = {};
+        }
+
+        // Use bindings if given, otherwise fall back on asking the bindings provider to give us some bindings
+        var bindings;
+        if (sourceBindings && typeof sourceBindings !== 'function') {
+            bindings = sourceBindings;
+        } else {
+            var provider = ko.bindingProvider['instance'],
+                getBindings = provider['getBindingAccessors'] || getBindingsAndMakeAccessors;
+
+            // Get the binding from the provider within a computed observable so that we can update the bindings whenever
+            // the binding context is updated or if the binding provider accesses observables.
+            var bindingsUpdater = ko.dependentObservable(
+                function() {
+                    bindings = sourceBindings ? sourceBindings(bindingContext, node) : getBindings.call(provider, node, bindingContext);
+                    // Register a dependency on the binding context to support observable view models.
+                    if (bindings) {
+                        if (bindingContext[contextSubscribable]) {
+                            bindingContext[contextSubscribable]();
+                        }
+                        if (bindingContext[contextDataDependency]) {
+                            bindingContext[contextDataDependency]();
+                        }
+                    }
+                    return bindings;
+                },
+                null, { disposeWhenNodeIsRemoved: node }
+            );
+
+            if (!bindings || !bindingsUpdater.isActive())
+                bindingsUpdater = null;
+        }
+
+        var contextToExtend = bindingContext;
+        var bindingHandlerThatControlsDescendantBindings;
+        if (bindings) {
+            // Return the value accessor for a given binding. When bindings are static (won't be updated because of a binding
+            // context update), just return the value accessor from the binding. Otherwise, return a function that always gets
+            // the latest binding value and registers a dependency on the binding updater.
+            var getValueAccessor = bindingsUpdater
+                ? function(bindingKey) {
+                    return function() {
+                        return evaluateValueAccessor(bindingsUpdater()[bindingKey]);
+                    };
+                } : function(bindingKey) {
+                    return bindings[bindingKey];
+                };
+
+            // Use of allBindings as a function is maintained for backwards compatibility, but its use is deprecated
+            function allBindings() {
+                return ko.utils.objectMap(bindingsUpdater ? bindingsUpdater() : bindings, evaluateValueAccessor);
+            }
+            // The following is the 3.x allBindings API
+            allBindings['get'] = function(key) {
+                return bindings[key] && evaluateValueAccessor(getValueAccessor(key));
+            };
+            allBindings['has'] = function(key) {
+                return key in bindings;
+            };
+
+            if (ko.bindingEvent.childrenComplete in bindings) {
+                ko.bindingEvent.subscribe(node, ko.bindingEvent.childrenComplete, function () {
+                    var callback = evaluateValueAccessor(bindings[ko.bindingEvent.childrenComplete]);
+                    if (callback) {
+                        var nodes = ko.virtualElements.childNodes(node);
+                        if (nodes.length) {
+                            callback(nodes, ko.dataFor(nodes[0]));
+                        }
+                    }
+                });
+            }
+
+            if (ko.bindingEvent.descendantsComplete in bindings) {
+                contextToExtend = ko.bindingEvent.startPossiblyAsyncContentBinding(node, bindingContext);
+                ko.bindingEvent.subscribe(node, ko.bindingEvent.descendantsComplete, function () {
+                    var callback = evaluateValueAccessor(bindings[ko.bindingEvent.descendantsComplete]);
+                    if (callback && ko.virtualElements.firstChild(node)) {
+                        callback(node);
+                    }
+                });
+            }
+
+            // First put the bindings into the right order
+            var orderedBindings = topologicalSortBindings(bindings);
+
+            // Go through the sorted bindings, calling init and update for each
+            ko.utils.arrayForEach(orderedBindings, function(bindingKeyAndHandler) {
+                // Note that topologicalSortBindings has already filtered out any nonexistent binding handlers,
+                // so bindingKeyAndHandler.handler will always be nonnull.
+                var handlerInitFn = bindingKeyAndHandler.handler["init"],
+                    handlerUpdateFn = bindingKeyAndHandler.handler["update"],
+                    bindingKey = bindingKeyAndHandler.key;
+
+                if (node.nodeType === 8) {
+                    validateThatBindingIsAllowedForVirtualElements(bindingKey);
+                }
+
+                try {
+                    // Run init, ignoring any dependencies
+                    if (typeof handlerInitFn == "function") {
+                        ko.dependencyDetection.ignore(function() {
+                            var initResult = handlerInitFn(node, getValueAccessor(bindingKey), allBindings, contextToExtend['$data'], contextToExtend);
+
+                            // If this binding handler claims to control descendant bindings, make a note of this
+                            if (initResult && initResult['controlsDescendantBindings']) {
+                                if (bindingHandlerThatControlsDescendantBindings !== undefined)
+                                    throw new Error("Multiple bindings (" + bindingHandlerThatControlsDescendantBindings + " and " + bindingKey + ") are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.");
+                                bindingHandlerThatControlsDescendantBindings = bindingKey;
+                            }
+                        });
+                    }
+
+                    // Run update in its own computed wrapper
+                    if (typeof handlerUpdateFn == "function") {
+                        ko.dependentObservable(
+                            function() {
+                                handlerUpdateFn(node, getValueAccessor(bindingKey), allBindings, contextToExtend['$data'], contextToExtend);
+                            },
+                            null,
+                            { disposeWhenNodeIsRemoved: node }
+                        );
+                    }
+                } catch (ex) {
+                    ex.message = "Unable to process binding \"" + bindingKey + ": " + bindings[bindingKey] + "\"\nMessage: " + ex.message;
+                    throw ex;
+                }
+            });
+        }
+
+        var shouldBindDescendants = bindingHandlerThatControlsDescendantBindings === undefined;
+        return {
+            'shouldBindDescendants': shouldBindDescendants,
+            'bindingContextForDescendants': shouldBindDescendants && contextToExtend
+        };
+    };
+
+    ko.storedBindingContextForNode = function (node) {
+        var bindingInfo = ko.utils.domData.get(node, boundElementDomDataKey);
+        return bindingInfo && bindingInfo.context;
+    }
+
+    function getBindingContext(viewModelOrBindingContext, extendContextCallback) {
+        return viewModelOrBindingContext && (viewModelOrBindingContext instanceof ko.bindingContext)
+            ? viewModelOrBindingContext
+            : new ko.bindingContext(viewModelOrBindingContext, undefined, undefined, extendContextCallback);
+    }
+
+    ko.applyBindingAccessorsToNode = function (node, bindings, viewModelOrBindingContext) {
+        if (node.nodeType === 1) // If it's an element, workaround IE <= 8 HTML parsing weirdness
+            ko.virtualElements.normaliseVirtualElementDomStructure(node);
+        return applyBindingsToNodeInternal(node, bindings, getBindingContext(viewModelOrBindingContext));
+    };
+
+    ko.applyBindingsToNode = function (node, bindings, viewModelOrBindingContext) {
+        var context = getBindingContext(viewModelOrBindingContext);
+        return ko.applyBindingAccessorsToNode(node, makeBindingAccessors(bindings, context, node), context);
+    };
+
+    ko.applyBindingsToDescendants = function(viewModelOrBindingContext, rootNode) {
+        if (rootNode.nodeType === 1 || rootNode.nodeType === 8)
+            applyBindingsToDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode);
+    };
+
+    ko.applyBindings = function (viewModelOrBindingContext, rootNode, extendContextCallback) {
+        // If jQuery is loaded after Knockout, we won't initially have access to it. So save it here.
+        if (!jQueryInstance && window['jQuery']) {
+            jQueryInstance = window['jQuery'];
+        }
+
+        if (arguments.length < 2) {
+            rootNode = document.body;
+            if (!rootNode) {
+                throw Error("ko.applyBindings: could not find document.body; has the document been loaded?");
+            }
+        } else if (!rootNode || (rootNode.nodeType !== 1 && rootNode.nodeType !== 8)) {
+            throw Error("ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node");
+        }
+
+        applyBindingsToNodeAndDescendantsInternal(getBindingContext(viewModelOrBindingContext, extendContextCallback), rootNode);
+    };
+
+    // Retrieving binding context from arbitrary nodes
+    ko.contextFor = function(node) {
+        // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them)
+        if (node && (node.nodeType === 1 || node.nodeType === 8)) {
+            return ko.storedBindingContextForNode(node);
+        }
+        return undefined;
+    };
+    ko.dataFor = function(node) {
+        var context = ko.contextFor(node);
+        return context ? context['$data'] : undefined;
+    };
+
+    ko.exportSymbol('bindingHandlers', ko.bindingHandlers);
+    ko.exportSymbol('bindingEvent', ko.bindingEvent);
+    ko.exportSymbol('bindingEvent.subscribe', ko.bindingEvent.subscribe);
+    ko.exportSymbol('bindingEvent.startPossiblyAsyncContentBinding', ko.bindingEvent.startPossiblyAsyncContentBinding);
+    ko.exportSymbol('applyBindings', ko.applyBindings);
+    ko.exportSymbol('applyBindingsToDescendants', ko.applyBindingsToDescendants);
+    ko.exportSymbol('applyBindingAccessorsToNode', ko.applyBindingAccessorsToNode);
+    ko.exportSymbol('applyBindingsToNode', ko.applyBindingsToNode);
+    ko.exportSymbol('contextFor', ko.contextFor);
+    ko.exportSymbol('dataFor', ko.dataFor);
+})();

vendors/knockout/src/binding/bindingProvider.js

@@ -0,0 +1,73 @@
+(function() {
+    var defaultBindingAttributeName = "data-bind";
+
+    ko.bindingProvider = function() {
+        this.bindingCache = {};
+    };
+
+    ko.utils.extend(ko.bindingProvider.prototype, {
+        'nodeHasBindings': function(node) {
+            switch (node.nodeType) {
+                case 1: // Element
+                    return node.getAttribute(defaultBindingAttributeName) != null
+                        || ko.components['getComponentNameForNode'](node);
+                case 8: // Comment node
+                    return ko.virtualElements.hasBindingValue(node);
+                default: return false;
+            }
+        },
+
+        'getBindings': function(node, bindingContext) {
+            var bindingsString = this['getBindingsString'](node, bindingContext),
+                parsedBindings = bindingsString ? this['parseBindingsString'](bindingsString, bindingContext, node) : null;
+            return ko.components.addBindingsForCustomElement(parsedBindings, node, bindingContext, /* valueAccessors */ false);
+        },
+
+        'getBindingAccessors': function(node, bindingContext) {
+            var bindingsString = this['getBindingsString'](node, bindingContext),
+                parsedBindings = bindingsString ? this['parseBindingsString'](bindingsString, bindingContext, node, { 'valueAccessors': true }) : null;
+            return ko.components.addBindingsForCustomElement(parsedBindings, node, bindingContext, /* valueAccessors */ true);
+        },
+
+        // The following function is only used internally by this default provider.
+        // It's not part of the interface definition for a general binding provider.
+        'getBindingsString': function(node, bindingContext) {
+            switch (node.nodeType) {
+                case 1: return node.getAttribute(defaultBindingAttributeName);   // Element
+                case 8: return ko.virtualElements.virtualNodeBindingValue(node); // Comment node
+                default: return null;
+            }
+        },
+
+        // The following function is only used internally by this default provider.
+        // It's not part of the interface definition for a general binding provider.
+        'parseBindingsString': function(bindingsString, bindingContext, node, options) {
+            try {
+                var bindingFunction = createBindingsStringEvaluatorViaCache(bindingsString, this.bindingCache, options);
+                return bindingFunction(bindingContext, node);
+            } catch (ex) {
+                ex.message = "Unable to parse bindings.\nBindings value: " + bindingsString + "\nMessage: " + ex.message;
+                throw ex;
+            }
+        }
+    });
+
+    ko.bindingProvider['instance'] = new ko.bindingProvider();
+
+    function createBindingsStringEvaluatorViaCache(bindingsString, cache, options) {
+        var cacheKey = bindingsString + (options && options['valueAccessors'] || '');
+        return cache[cacheKey]
+            || (cache[cacheKey] = createBindingsStringEvaluator(bindingsString, options));
+    }
+
+    function createBindingsStringEvaluator(bindingsString, options) {
+        // Build the source for a function that evaluates "expression"
+        // For each scope variable, add an extra level of "with" nesting
+        // Example result: with(sc1) { with(sc0) { return (expression) } }
+        var rewrittenBindings = ko.expressionRewriting.preProcessBindings(bindingsString, options),
+            functionBody = "with($context){with($data||{}){return{" + rewrittenBindings + "}}}";
+        return new Function("$context", "$element", functionBody);
+    }
+})();
+
+ko.exportSymbol('bindingProvider', ko.bindingProvider);

vendors/knockout/src/binding/defaultBindings/attr.js

@@ -0,0 +1,45 @@
+var attrHtmlToJavaScriptMap = { 'class': 'className', 'for': 'htmlFor' };
+ko.bindingHandlers['attr'] = {
+    'update': function(element, valueAccessor, allBindings) {
+        var value = ko.utils.unwrapObservable(valueAccessor()) || {};
+        ko.utils.objectForEach(value, function(attrName, attrValue) {
+            attrValue = ko.utils.unwrapObservable(attrValue);
+
+            // Find the namespace of this attribute, if any.
+            var prefixLen = attrName.indexOf(':');
+            var namespace = "lookupNamespaceURI" in element && prefixLen > 0 && element.lookupNamespaceURI(attrName.substr(0, prefixLen));
+
+            // To cover cases like "attr: { checked:someProp }", we want to remove the attribute entirely
+            // when someProp is a "no value"-like value (strictly null, false, or undefined)
+            // (because the absence of the "checked" attr is how to mark an element as not checked, etc.)
+            var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined);
+            if (toRemove) {
+                namespace ? element.removeAttributeNS(namespace, attrName) : element.removeAttribute(attrName);
+            } else {
+                attrValue = attrValue.toString();
+            }
+
+            // In IE <= 7 and IE8 Quirks Mode, you have to use the JavaScript property name instead of the
+            // HTML attribute name for certain attributes. IE8 Standards Mode supports the correct behavior,
+            // but instead of figuring out the mode, we'll just set the attribute through the JavaScript
+            // property for IE <= 8.
+            if (ko.utils.ieVersion <= 8 && attrName in attrHtmlToJavaScriptMap) {
+                attrName = attrHtmlToJavaScriptMap[attrName];
+                if (toRemove)
+                    element.removeAttribute(attrName);
+                else
+                    element[attrName] = attrValue;
+            } else if (!toRemove) {
+                namespace ? element.setAttributeNS(namespace, attrName, attrValue) : element.setAttribute(attrName, attrValue);
+            }
+
+            // Treat "name" specially - although you can think of it as an attribute, it also needs
+            // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333)
+            // Deliberately being case-sensitive here because XHTML would regard "Name" as a different thing
+            // entirely, and there's no strong reason to allow for such casing in HTML.
+            if (attrName === "name") {
+                ko.utils.setElementName(element, toRemove ? "" : attrValue);
+            }
+        });
+    }
+};

vendors/knockout/src/binding/defaultBindings/checked.js

@@ -0,0 +1,130 @@
+(function() {
+
+ko.bindingHandlers['checked'] = {
+    'after': ['value', 'attr'],
+    'init': function (element, valueAccessor, allBindings) {
+        var checkedValue = ko.pureComputed(function() {
+            // Treat "value" like "checkedValue" when it is included with "checked" binding
+            if (allBindings['has']('checkedValue')) {
+                return ko.utils.unwrapObservable(allBindings.get('checkedValue'));
+            } else if (useElementValue) {
+                if (allBindings['has']('value')) {
+                    return ko.utils.unwrapObservable(allBindings.get('value'));
+                } else {
+                    return element.value;
+                }
+            }
+        });
+
+        function updateModel() {
+            // This updates the model value from the view value.
+            // It runs in response to DOM events (click) and changes in checkedValue.
+            var isChecked = element.checked,
+                elemValue = checkedValue();
+
+            // When we're first setting up this computed, don't change any model state.
+            if (ko.computedContext.isInitial()) {
+                return;
+            }
+
+            // We can ignore unchecked radio buttons, because some other radio
+            // button will be checked, and that one can take care of updating state.
+            // Also ignore value changes to an already unchecked checkbox.
+            if (!isChecked && (isRadio || ko.computedContext.getDependenciesCount())) {
+                return;
+            }
+
+            var modelValue = ko.dependencyDetection.ignore(valueAccessor);
+            if (valueIsArray) {
+                var writableValue = rawValueIsNonArrayObservable ? modelValue.peek() : modelValue,
+                    saveOldValue = oldElemValue;
+                oldElemValue = elemValue;
+
+                if (saveOldValue !== elemValue) {
+                    // When we're responding to the checkedValue changing, and the element is
+                    // currently checked, replace the old elem value with the new elem value
+                    // in the model array.
+                    if (isChecked) {
+                        ko.utils.addOrRemoveItem(writableValue, elemValue, true);
+                        ko.utils.addOrRemoveItem(writableValue, saveOldValue, false);
+                    }
+                } else {
+                    // When we're responding to the user having checked/unchecked a checkbox,
+                    // add/remove the element value to the model array.
+                    ko.utils.addOrRemoveItem(writableValue, elemValue, isChecked);
+                }
+
+                if (rawValueIsNonArrayObservable && ko.isWriteableObservable(modelValue)) {
+                    modelValue(writableValue);
+                }
+            } else {
+                if (isCheckbox) {
+                    if (elemValue === undefined) {
+                        elemValue = isChecked;
+                    } else if (!isChecked) {
+                        elemValue = undefined;
+                    }
+                }
+                ko.expressionRewriting.writeValueToProperty(modelValue, allBindings, 'checked', elemValue, true);
+            }
+        };
+
+        function updateView() {
+            // This updates the view value from the model value.
+            // It runs in response to changes in the bound (checked) value.
+            var modelValue = ko.utils.unwrapObservable(valueAccessor()),
+                elemValue = checkedValue();
+
+            if (valueIsArray) {
+                // When a checkbox is bound to an array, being checked represents its value being present in that array
+                element.checked = ko.utils.arrayIndexOf(modelValue, elemValue) >= 0;
+                oldElemValue = elemValue;
+            } else if (isCheckbox && elemValue === undefined) {
+                // When a checkbox is bound to any other value (not an array) and "checkedValue" is not defined,
+                // being checked represents the value being trueish
+                element.checked = !!modelValue;
+            } else {
+                // Otherwise, being checked means that the checkbox or radio button's value corresponds to the model value
+                element.checked = (checkedValue() === modelValue);
+            }
+        };
+
+        var isCheckbox = element.type == "checkbox",
+            isRadio = element.type == "radio";
+
+        // Only bind to check boxes and radio buttons
+        if (!isCheckbox && !isRadio) {
+            return;
+        }
+
+        var rawValue = valueAccessor(),
+            valueIsArray = isCheckbox && (ko.utils.unwrapObservable(rawValue) instanceof Array),
+            rawValueIsNonArrayObservable = !(valueIsArray && rawValue.push && rawValue.splice),
+            useElementValue = isRadio || valueIsArray,
+            oldElemValue = valueIsArray ? checkedValue() : undefined;
+
+        // IE 6 won't allow radio buttons to be selected unless they have a name
+        if (isRadio && !element.name)
+            ko.bindingHandlers['uniqueName']['init'](element, function() { return true });
+
+        // Set up two computeds to update the binding:
+
+        // The first responds to changes in the checkedValue value and to element clicks
+        ko.computed(updateModel, null, { disposeWhenNodeIsRemoved: element });
+        ko.utils.registerEventHandler(element, "click", updateModel);
+
+        // The second responds to changes in the model value (the one associated with the checked binding)
+        ko.computed(updateView, null, { disposeWhenNodeIsRemoved: element });
+
+        rawValue = undefined;
+    }
+};
+ko.expressionRewriting.twoWayBindings['checked'] = true;
+
+ko.bindingHandlers['checkedValue'] = {
+    'update': function (element, valueAccessor) {
+        element.value = ko.utils.unwrapObservable(valueAccessor());
+    }
+};
+
+})();

vendors/knockout/src/binding/defaultBindings/click.js

@@ -0,0 +1,2 @@
+// 'click' is just a shorthand for the usual full-length event:{click:handler}
+makeEventHandlerShortcut('click');

vendors/knockout/src/binding/defaultBindings/css.js

@@ -0,0 +1,23 @@
+var classesWrittenByBindingKey = '__ko__cssValue';
+ko.bindingHandlers['class'] = {
+    'update': function (element, valueAccessor) {
+        var value = ko.utils.stringTrim(ko.utils.unwrapObservable(valueAccessor()));
+        ko.utils.toggleDomNodeCssClass(element, element[classesWrittenByBindingKey], false);
+        element[classesWrittenByBindingKey] = value;
+        ko.utils.toggleDomNodeCssClass(element, value, true);
+    }
+};
+
+ko.bindingHandlers['css'] = {
+    'update': function (element, valueAccessor) {
+        var value = ko.utils.unwrapObservable(valueAccessor());
+        if (value !== null && typeof value == "object") {
+            ko.utils.objectForEach(value, function(className, shouldHaveClass) {
+                shouldHaveClass = ko.utils.unwrapObservable(shouldHaveClass);
+                ko.utils.toggleDomNodeCssClass(element, className, shouldHaveClass);
+            });
+        } else {
+            ko.bindingHandlers['class']['update'](element, valueAccessor);
+        }
+    }
+};

vendors/knockout/src/binding/defaultBindings/enableDisable.js

@@ -0,0 +1,15 @@
+ko.bindingHandlers['enable'] = {
+    'update': function (element, valueAccessor) {
+        var value = ko.utils.unwrapObservable(valueAccessor());
+        if (value && element.disabled)
+            element.removeAttribute("disabled");
+        else if ((!value) && (!element.disabled))
+            element.disabled = true;
+    }
+};
+
+ko.bindingHandlers['disable'] = {
+    'update': function (element, valueAccessor) {
+        ko.bindingHandlers['enable']['update'](element, function() { return !ko.utils.unwrapObservable(valueAccessor()) });
+    }
+};

vendors/knockout/src/binding/defaultBindings/event.js

@@ -0,0 +1,52 @@
+// For certain common events (currently just 'click'), allow a simplified data-binding syntax
+// e.g. click:handler instead of the usual full-length event:{click:handler}
+function makeEventHandlerShortcut(eventName) {
+    ko.bindingHandlers[eventName] = {
+        'init': function(element, valueAccessor, allBindings, viewModel, bindingContext) {
+            var newValueAccessor = function () {
+                var result = {};
+                result[eventName] = valueAccessor();
+                return result;
+            };
+            return ko.bindingHandlers['event']['init'].call(this, element, newValueAccessor, allBindings, viewModel, bindingContext);
+        }
+    }
+}
+
+ko.bindingHandlers['event'] = {
+    'init' : function (element, valueAccessor, allBindings, viewModel, bindingContext) {
+        var eventsToHandle = valueAccessor() || {};
+        ko.utils.objectForEach(eventsToHandle, function(eventName) {
+            if (typeof eventName == "string") {
+                ko.utils.registerEventHandler(element, eventName, function (event) {
+                    var handlerReturnValue;
+                    var handlerFunction = valueAccessor()[eventName];
+                    if (!handlerFunction)
+                        return;
+
+                    try {
+                        // Take all the event args, and prefix with the viewmodel
+                        var argsForHandler = ko.utils.makeArray(arguments);
+                        viewModel = bindingContext['$data'];
+                        argsForHandler.unshift(viewModel);
+                        handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler);
+                    } finally {
+                        if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.
+                            if (event.preventDefault)
+                                event.preventDefault();
+                            else
+                                event.returnValue = false;
+                        }
+                    }
+
+                    var bubble = allBindings.get(eventName + 'Bubble') !== false;
+                    if (!bubble) {
+                        event.cancelBubble = true;
+                        if (event.stopPropagation)
+                            event.stopPropagation();
+                    }
+                });
+            }
+        });
+    }
+};

vendors/knockout/src/binding/defaultBindings/foreach.js

@@ -0,0 +1,39 @@
+// "foreach: someExpression" is equivalent to "template: { foreach: someExpression }"
+// "foreach: { data: someExpression, afterAdd: myfn }" is equivalent to "template: { foreach: someExpression, afterAdd: myfn }"
+ko.bindingHandlers['foreach'] = {
+    makeTemplateValueAccessor: function(valueAccessor) {
+        return function() {
+            var modelValue = valueAccessor(),
+                unwrappedValue = ko.utils.peekObservable(modelValue);    // Unwrap without setting a dependency here
+
+            // If unwrappedValue is the array, pass in the wrapped value on its own
+            // The value will be unwrapped and tracked within the template binding
+            // (See https://github.com/SteveSanderson/knockout/issues/523)
+            if ((!unwrappedValue) || typeof unwrappedValue.length == "number")
+                return { 'foreach': modelValue, 'templateEngine': ko.nativeTemplateEngine.instance };
+
+            // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates
+            ko.utils.unwrapObservable(modelValue);
+            return {
+                'foreach': unwrappedValue['data'],
+                'as': unwrappedValue['as'],
+                'noChildContext': unwrappedValue['noChildContext'],
+                'includeDestroyed': unwrappedValue['includeDestroyed'],
+                'afterAdd': unwrappedValue['afterAdd'],
+                'beforeRemove': unwrappedValue['beforeRemove'],
+                'afterRender': unwrappedValue['afterRender'],
+                'beforeMove': unwrappedValue['beforeMove'],
+                'afterMove': unwrappedValue['afterMove'],
+                'templateEngine': ko.nativeTemplateEngine.instance
+            };
+        };
+    },
+    'init': function(element, valueAccessor, allBindings, viewModel, bindingContext) {
+        return ko.bindingHandlers['template']['init'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor));
+    },
+    'update': function(element, valueAccessor, allBindings, viewModel, bindingContext) {
+        return ko.bindingHandlers['template']['update'](element, ko.bindingHandlers['foreach'].makeTemplateValueAccessor(valueAccessor), allBindings, viewModel, bindingContext);
+    }
+};
+ko.expressionRewriting.bindingRewriteValidators['foreach'] = false; // Can't rewrite control flow bindings
+ko.virtualElements.allowedBindings['foreach'] = true;

vendors/knockout/src/binding/defaultBindings/hasfocus.js

@@ -0,0 +1,63 @@
+var hasfocusUpdatingProperty = '__ko_hasfocusUpdating';
+var hasfocusLastValue = '__ko_hasfocusLastValue';
+ko.bindingHandlers['hasfocus'] = {
+    'init': function(element, valueAccessor, allBindings) {
+        var handleElementFocusChange = function(isFocused) {
+            // Where possible, ignore which event was raised and determine focus state using activeElement,
+            // as this avoids phantom focus/blur events raised when changing tabs in modern browsers.
+            // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers,
+            // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus
+            // from calling 'blur()' on the element when it loses focus.
+            // Discussion at https://github.com/SteveSanderson/knockout/pull/352
+            element[hasfocusUpdatingProperty] = true;
+            var ownerDoc = element.ownerDocument;
+            if ("activeElement" in ownerDoc) {
+                var active;
+                try {
+                    active = ownerDoc.activeElement;
+                } catch(e) {
+                    // IE9 throws if you access activeElement during page load (see issue #703)
+                    active = ownerDoc.body;
+                }
+                isFocused = (active === element);
+            }
+            var modelValue = valueAccessor();
+            ko.expressionRewriting.writeValueToProperty(modelValue, allBindings, 'hasfocus', isFocused, true);
+
+            //cache the latest value, so we can avoid unnecessarily calling focus/blur in the update function
+            element[hasfocusLastValue] = isFocused;
+            element[hasfocusUpdatingProperty] = false;
+        };
+        var handleElementFocusIn = handleElementFocusChange.bind(null, true);
+        var handleElementFocusOut = handleElementFocusChange.bind(null, false);
+
+        ko.utils.registerEventHandler(element, "focus", handleElementFocusIn);
+        ko.utils.registerEventHandler(element, "focusin", handleElementFocusIn); // For IE
+        ko.utils.registerEventHandler(element, "blur",  handleElementFocusOut);
+        ko.utils.registerEventHandler(element, "focusout",  handleElementFocusOut); // For IE
+
+        // Assume element is not focused (prevents "blur" being called initially)
+        element[hasfocusLastValue] = false;
+    },
+    'update': function(element, valueAccessor) {
+        var value = !!ko.utils.unwrapObservable(valueAccessor());
+
+        if (!element[hasfocusUpdatingProperty] && element[hasfocusLastValue] !== value) {
+            value ? element.focus() : element.blur();
+
+            // In IE, the blur method doesn't always cause the element to lose focus (for example, if the window is not in focus).
+            // Setting focus to the body element does seem to be reliable in IE, but should only be used if we know that the current
+            // element was focused already.
+            if (!value && element[hasfocusLastValue]) {
+                element.ownerDocument.body.focus();
+            }
+
+            // For IE, which doesn't reliably fire "focus" or "blur" events synchronously
+            ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, value ? "focusin" : "focusout"]);
+        }
+    }
+};
+ko.expressionRewriting.twoWayBindings['hasfocus'] = true;
+
+ko.bindingHandlers['hasFocus'] = ko.bindingHandlers['hasfocus']; // Make "hasFocus" an alias
+ko.expressionRewriting.twoWayBindings['hasFocus'] = 'hasfocus';

vendors/knockout/src/binding/defaultBindings/html.js

@@ -0,0 +1,10 @@
+ko.bindingHandlers['html'] = {
+    'init': function() {
+        // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications)
+        return { 'controlsDescendantBindings': true };
+    },
+    'update': function (element, valueAccessor) {
+        // setHtml will unwrap the value if needed
+        ko.utils.setHtml(element, valueAccessor());
+    }
+};

vendors/knockout/src/binding/defaultBindings/ifIfnotWith.js

@@ -0,0 +1,81 @@
+(function () {
+
+// Makes a binding like with or if
+function makeWithIfBinding(bindingKey, isWith, isNot) {
+    ko.bindingHandlers[bindingKey] = {
+        'init': function(element, valueAccessor, allBindings, viewModel, bindingContext) {
+            var didDisplayOnLastUpdate, savedNodes, contextOptions = {}, completeOnRender, needAsyncContext, renderOnEveryChange;
+
+            if (isWith) {
+                var as = allBindings.get('as'), noChildContext = allBindings.get('noChildContext');
+                renderOnEveryChange = !(as && noChildContext);
+                contextOptions = { 'as': as, 'noChildContext': noChildContext, 'exportDependencies': renderOnEveryChange };
+            }
+
+            completeOnRender = allBindings.get("completeOn") == "render";
+            needAsyncContext = completeOnRender || allBindings['has'](ko.bindingEvent.descendantsComplete);
+
+            ko.computed(function() {
+                var value = ko.utils.unwrapObservable(valueAccessor()),
+                    shouldDisplay = !isNot !== !value, // equivalent to isNot ? !value : !!value,
+                    isInitial = !savedNodes,
+                    childContext;
+
+                if (!renderOnEveryChange && shouldDisplay === didDisplayOnLastUpdate) {
+                    return;
+                }
+
+                if (needAsyncContext) {
+                    bindingContext = ko.bindingEvent.startPossiblyAsyncContentBinding(element, bindingContext);
+                }
+
+                if (shouldDisplay) {
+                    if (!isWith || renderOnEveryChange) {
+                        contextOptions['dataDependency'] = ko.computedContext.computed();
+                    }
+
+                    if (isWith) {
+                        childContext = bindingContext['createChildContext'](typeof value == "function" ? value : valueAccessor, contextOptions);
+                    } else if (ko.computedContext.getDependenciesCount()) {
+                        childContext = bindingContext['extend'](null, contextOptions);
+                    } else {
+                        childContext = bindingContext;
+                    }
+                }
+
+                // Save a copy of the inner nodes on the initial update, but only if we have dependencies.
+                if (isInitial && ko.computedContext.getDependenciesCount()) {
+                    savedNodes = ko.utils.cloneNodes(ko.virtualElements.childNodes(element), true /* shouldCleanNodes */);
+                }
+
+                if (shouldDisplay) {
+                    if (!isInitial) {
+                        ko.virtualElements.setDomNodeChildren(element, ko.utils.cloneNodes(savedNodes));
+                    }
+
+                    ko.applyBindingsToDescendants(childContext, element);
+                } else {
+                    ko.virtualElements.emptyNode(element);
+
+                    if (!completeOnRender) {
+                        ko.bindingEvent.notify(element, ko.bindingEvent.childrenComplete);
+                    }
+                }
+
+                didDisplayOnLastUpdate = shouldDisplay;
+
+            }, null, { disposeWhenNodeIsRemoved: element });
+
+            return { 'controlsDescendantBindings': true };
+        }
+    };
+    ko.expressionRewriting.bindingRewriteValidators[bindingKey] = false; // Can't rewrite control flow bindings
+    ko.virtualElements.allowedBindings[bindingKey] = true;
+}
+
+// Construct the actual binding handlers
+makeWithIfBinding('if');
+makeWithIfBinding('ifnot', false /* isWith */, true /* isNot */);
+makeWithIfBinding('with', true /* isWith */);
+
+})();

vendors/knockout/src/binding/defaultBindings/let.js

@@ -0,0 +1,10 @@
+ko.bindingHandlers['let'] = {
+    'init': function(element, valueAccessor, allBindings, viewModel, bindingContext) {
+        // Make a modified binding context, with extra properties, and apply it to descendant elements
+        var innerContext = bindingContext['extend'](valueAccessor);
+        ko.applyBindingsToDescendants(innerContext, element);
+
+        return { 'controlsDescendantBindings': true };
+    }
+};
+ko.virtualElements.allowedBindings['let'] = true;

vendors/knockout/src/binding/defaultBindings/options.js

@@ -0,0 +1,164 @@
+var captionPlaceholder = {};
+ko.bindingHandlers['options'] = {
+    'init': function(element) {
+        if (ko.utils.tagNameLower(element) !== "select")
+            throw new Error("options binding applies only to SELECT elements");
+
+        // Remove all existing <option>s.
+        while (element.length > 0) {
+            element.remove(0);
+        }
+
+        // Ensures that the binding processor doesn't try to bind the options
+        return { 'controlsDescendantBindings': true };
+    },
+    'update': function (element, valueAccessor, allBindings) {
+        function selectedOptions() {
+            return ko.utils.arrayFilter(element.options, function (node) { return node.selected; });
+        }
+
+        var selectWasPreviouslyEmpty = element.length == 0,
+            multiple = element.multiple,
+            previousScrollTop = (!selectWasPreviouslyEmpty && multiple) ? element.scrollTop : null,
+            unwrappedArray = ko.utils.unwrapObservable(valueAccessor()),
+            valueAllowUnset = allBindings.get('valueAllowUnset') && allBindings['has']('value'),
+            includeDestroyed = allBindings.get('optionsIncludeDestroyed'),
+            arrayToDomNodeChildrenOptions = {},
+            captionValue,
+            filteredArray,
+            previousSelectedValues = [];
+
+        if (!valueAllowUnset) {
+            if (multiple) {
+                previousSelectedValues = ko.utils.arrayMap(selectedOptions(), ko.selectExtensions.readValue);
+            } else if (element.selectedIndex >= 0) {
+                previousSelectedValues.push(ko.selectExtensions.readValue(element.options[element.selectedIndex]));
+            }
+        }
+
+        if (unwrappedArray) {
+            if (typeof unwrappedArray.length == "undefined") // Coerce single value into array
+                unwrappedArray = [unwrappedArray];
+
+            // Filter out any entries marked as destroyed
+            filteredArray = ko.utils.arrayFilter(unwrappedArray, function(item) {
+                return includeDestroyed || item === undefined || item === null || !ko.utils.unwrapObservable(item['_destroy']);
+            });
+
+            // If caption is included, add it to the array
+            if (allBindings['has']('optionsCaption')) {
+                captionValue = ko.utils.unwrapObservable(allBindings.get('optionsCaption'));
+                // If caption value is null or undefined, don't show a caption
+                if (captionValue !== null && captionValue !== undefined) {
+                    filteredArray.unshift(captionPlaceholder);
+                }
+            }
+        } else {
+            // If a falsy value is provided (e.g. null), we'll simply empty the select element
+        }
+
+        function applyToObject(object, predicate, defaultValue) {
+            var predicateType = typeof predicate;
+            if (predicateType == "function")    // Given a function; run it against the data value
+                return predicate(object);
+            else if (predicateType == "string") // Given a string; treat it as a property name on the data value
+                return object[predicate];
+            else                                // Given no optionsText arg; use the data value itself
+                return defaultValue;
+        }
+
+        // The following functions can run at two different times:
+        // The first is when the whole array is being updated directly from this binding handler.
+        // The second is when an observable value for a specific array entry is updated.
+        // oldOptions will be empty in the first case, but will be filled with the previously generated option in the second.
+        var itemUpdate = false;
+        function optionForArrayItem(arrayEntry, index, oldOptions) {
+            if (oldOptions.length) {
+                previousSelectedValues = !valueAllowUnset && oldOptions[0].selected ? [ ko.selectExtensions.readValue(oldOptions[0]) ] : [];
+                itemUpdate = true;
+            }
+            var option = element.ownerDocument.createElement("option");
+            if (arrayEntry === captionPlaceholder) {
+                ko.utils.setTextContent(option, allBindings.get('optionsCaption'));
+                ko.selectExtensions.writeValue(option, undefined);
+            } else {
+                // Apply a value to the option element
+                var optionValue = applyToObject(arrayEntry, allBindings.get('optionsValue'), arrayEntry);
+                ko.selectExtensions.writeValue(option, ko.utils.unwrapObservable(optionValue));
+
+                // Apply some text to the option element
+                var optionText = applyToObject(arrayEntry, allBindings.get('optionsText'), optionValue);
+                ko.utils.setTextContent(option, optionText);
+            }
+            return [option];
+        }
+
+        // By using a beforeRemove callback, we delay the removal until after new items are added. This fixes a selection
+        // problem in IE<=8 and Firefox. See https://github.com/knockout/knockout/issues/1208
+        arrayToDomNodeChildrenOptions['beforeRemove'] =
+            function (option) {
+                element.removeChild(option);
+            };
+
+        function setSelectionCallback(arrayEntry, newOptions) {
+            if (itemUpdate && valueAllowUnset) {
+                // The model value is authoritative, so make sure its value is the one selected
+                ko.bindingEvent.notify(element, ko.bindingEvent.childrenComplete);
+            } else if (previousSelectedValues.length) {
+                // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document.
+                // That's why we first added them without selection. Now it's time to set the selection.
+                var isSelected = ko.utils.arrayIndexOf(previousSelectedValues, ko.selectExtensions.readValue(newOptions[0])) >= 0;
+                ko.utils.setOptionNodeSelectionState(newOptions[0], isSelected);
+
+                // If this option was changed from being selected during a single-item update, notify the change
+                if (itemUpdate && !isSelected) {
+                    ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, "change"]);
+                }
+            }
+        }
+
+        var callback = setSelectionCallback;
+        if (allBindings['has']('optionsAfterRender') && typeof allBindings.get('optionsAfterRender') == "function") {
+            callback = function(arrayEntry, newOptions) {
+                setSelectionCallback(arrayEntry, newOptions);
+                ko.dependencyDetection.ignore(allBindings.get('optionsAfterRender'), null, [newOptions[0], arrayEntry !== captionPlaceholder ? arrayEntry : undefined]);
+            }
+        }
+
+        ko.utils.setDomNodeChildrenFromArrayMapping(element, filteredArray, optionForArrayItem, arrayToDomNodeChildrenOptions, callback);
+
+        if (!valueAllowUnset) {
+            // Determine if the selection has changed as a result of updating the options list
+            var selectionChanged;
+            if (multiple) {
+                // For a multiple-select box, compare the new selection count to the previous one
+                // But if nothing was selected before, the selection can't have changed
+                selectionChanged = previousSelectedValues.length && selectedOptions().length < previousSelectedValues.length;
+            } else {
+                // For a single-select box, compare the current value to the previous value
+                // But if nothing was selected before or nothing is selected now, just look for a change in selection
+                selectionChanged = (previousSelectedValues.length && element.selectedIndex >= 0)
+                    ? (ko.selectExtensions.readValue(element.options[element.selectedIndex]) !== previousSelectedValues[0])
+                    : (previousSelectedValues.length || element.selectedIndex >= 0);
+            }
+
+            // Ensure consistency between model value and selected option.
+            // If the dropdown was changed so that selection is no longer the same,
+            // notify the value or selectedOptions binding.
+            if (selectionChanged) {
+                ko.dependencyDetection.ignore(ko.utils.triggerEvent, null, [element, "change"]);
+            }
+        }
+
+        if (valueAllowUnset || ko.computedContext.isInitial()) {
+            ko.bindingEvent.notify(element, ko.bindingEvent.childrenComplete);
+        }
+
+        // Workaround for IE bug
+        ko.utils.ensureSelectElementIsRenderedCorrectly(element);
+
+        if (previousScrollTop && Math.abs(previousScrollTop - element.scrollTop) > 20)
+            element.scrollTop = previousScrollTop;
+    }
+};
+ko.bindingHandlers['options'].optionValueDomDataKey = ko.utils.domData.nextKey();

vendors/knockout/src/binding/defaultBindings/selectedOptions.js

@@ -0,0 +1,44 @@
+ko.bindingHandlers['selectedOptions'] = {
+    'init': function (element, valueAccessor, allBindings) {
+        function updateFromView() {
+            var value = valueAccessor(), valueToWrite = [];
+            ko.utils.arrayForEach(element.getElementsByTagName("option"), function(node) {
+                if (node.selected)
+                    valueToWrite.push(ko.selectExtensions.readValue(node));
+            });
+            ko.expressionRewriting.writeValueToProperty(value, allBindings, 'selectedOptions', valueToWrite);
+        }
+
+        function updateFromModel() {
+            var newValue = ko.utils.unwrapObservable(valueAccessor()),
+                previousScrollTop = element.scrollTop;
+
+            if (newValue && typeof newValue.length == "number") {
+                ko.utils.arrayForEach(element.getElementsByTagName("option"), function(node) {
+                    var isSelected = ko.utils.arrayIndexOf(newValue, ko.selectExtensions.readValue(node)) >= 0;
+                    if (node.selected != isSelected) {      // This check prevents flashing of the select element in IE
+                        ko.utils.setOptionNodeSelectionState(node, isSelected);
+                    }
+                });
+            }
+
+            element.scrollTop = previousScrollTop;
+        }
+
+        if (ko.utils.tagNameLower(element) != "select") {
+            throw new Error("selectedOptions binding applies only to SELECT elements");
+        }
+
+        var updateFromModelComputed;
+        ko.bindingEvent.subscribe(element, ko.bindingEvent.childrenComplete, function () {
+            if (!updateFromModelComputed) {
+                ko.utils.registerEventHandler(element, "change", updateFromView);
+                updateFromModelComputed = ko.computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });
+            } else {
+                updateFromView();
+            }
+        }, null, { 'notifyImmediately': true });
+    },
+    'update': function() {} // Keep for backwards compatibility with code that may have wrapped binding
+};
+ko.expressionRewriting.twoWayBindings['selectedOptions'] = true;

vendors/knockout/src/binding/defaultBindings/style.js

@@ -0,0 +1,31 @@
+ko.bindingHandlers['style'] = {
+    'update': function (element, valueAccessor) {
+        var value = ko.utils.unwrapObservable(valueAccessor() || {});
+        ko.utils.objectForEach(value, function(styleName, styleValue) {
+            styleValue = ko.utils.unwrapObservable(styleValue);
+
+            if (styleValue === null || styleValue === undefined || styleValue === false) {
+                // Empty string removes the value, whereas null/undefined have no effect
+                styleValue = "";
+            }
+
+            if (jQueryInstance) {
+                jQueryInstance(element)['css'](styleName, styleValue);
+            } else if (/^--/.test(styleName)) {
+                // Is styleName a custom CSS property?
+                element.style.setProperty(styleName, styleValue);
+            } else {
+                styleName = styleName.replace(/-(\w)/g, function (all, letter) {
+                    return letter.toUpperCase();
+                });
+
+                var previousStyle = element.style[styleName];
+                element.style[styleName] = styleValue;
+
+                if (styleValue !== previousStyle && element.style[styleName] == previousStyle && !isNaN(styleValue)) {
+                    element.style[styleName] = styleValue + "px";
+                }
+            }
+        });
+    }
+};

vendors/knockout/src/binding/defaultBindings/submit.js

@@ -0,0 +1,19 @@
+ko.bindingHandlers['submit'] = {
+    'init': function (element, valueAccessor, allBindings, viewModel, bindingContext) {
+        if (typeof valueAccessor() != "function")
+            throw new Error("The value for a submit binding must be a function");
+        ko.utils.registerEventHandler(element, "submit", function (event) {
+            var handlerReturnValue;
+            var value = valueAccessor();
+            try { handlerReturnValue = value.call(bindingContext['$data'], element); }
+            finally {
+                if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.
+                    if (event.preventDefault)
+                        event.preventDefault();
+                    else
+                        event.returnValue = false;
+                }
+            }
+        });
+    }
+};

vendors/knockout/src/binding/defaultBindings/text.js

@@ -0,0 +1,11 @@
+ko.bindingHandlers['text'] = {
+    'init': function() {
+        // Prevent binding on the dynamically-injected text node (as developers are unlikely to expect that, and it has security implications).
+        // It should also make things faster, as we no longer have to consider whether the text node might be bindable.
+        return { 'controlsDescendantBindings': true };
+    },
+    'update': function (element, valueAccessor) {
+        ko.utils.setTextContent(element, valueAccessor());
+    }
+};
+ko.virtualElements.allowedBindings['text'] = true;

vendors/knockout/src/binding/defaultBindings/textInput.js

@@ -0,0 +1,203 @@
+(function () {
+
+if (window && window.navigator) {
+    var parseVersion = function (matches) {
+        if (matches) {
+            return parseFloat(matches[1]);
+        }
+    };
+
+    // Detect various browser versions because some old versions don't fully support the 'input' event
+    var userAgent = window.navigator.userAgent,
+        operaVersion, chromeVersion, safariVersion, firefoxVersion, ieVersion, edgeVersion;
+
+    (operaVersion = window.opera && window.opera.version && parseInt(window.opera.version()))
+        || (edgeVersion = parseVersion(userAgent.match(/Edge\/([^ ]+)$/)))
+        || (chromeVersion = parseVersion(userAgent.match(/Chrome\/([^ ]+)/)))
+        || (safariVersion = parseVersion(userAgent.match(/Version\/([^ ]+) Safari/)))
+        || (firefoxVersion = parseVersion(userAgent.match(/Firefox\/([^ ]+)/)))
+        || (ieVersion = ko.utils.ieVersion || parseVersion(userAgent.match(/MSIE ([^ ]+)/)))      // Detects up to IE 10
+        || (ieVersion = parseVersion(userAgent.match(/rv:([^ )]+)/)));      // Detects IE 11
+}
+
+// IE 8 and 9 have bugs that prevent the normal events from firing when the value changes.
+// But it does fire the 'selectionchange' event on many of those, presumably because the
+// cursor is moving and that counts as the selection changing. The 'selectionchange' event is
+// fired at the document level only and doesn't directly indicate which element changed. We
+// set up just one event handler for the document and use 'activeElement' to determine which
+// element was changed.
+if (ieVersion >= 8 && ieVersion < 10) {
+    var selectionChangeRegisteredName = ko.utils.domData.nextKey(),
+        selectionChangeHandlerName = ko.utils.domData.nextKey();
+    var selectionChangeHandler = function(event) {
+        var target = this.activeElement,
+            handler = target && ko.utils.domData.get(target, selectionChangeHandlerName);
+        if (handler) {
+            handler(event);
+        }
+    };
+    var registerForSelectionChangeEvent = function (element, handler) {
+        var ownerDoc = element.ownerDocument;
+        if (!ko.utils.domData.get(ownerDoc, selectionChangeRegisteredName)) {
+            ko.utils.domData.set(ownerDoc, selectionChangeRegisteredName, true);
+            ko.utils.registerEventHandler(ownerDoc, 'selectionchange', selectionChangeHandler);
+        }
+        ko.utils.domData.set(element, selectionChangeHandlerName, handler);
+    };
+}
+
+ko.bindingHandlers['textInput'] = {
+    'init': function (element, valueAccessor, allBindings) {
+
+        var previousElementValue = element.value,
+            timeoutHandle,
+            elementValueBeforeEvent;
+
+        var updateModel = function (event) {
+            clearTimeout(timeoutHandle);
+            elementValueBeforeEvent = timeoutHandle = undefined;
+
+            var elementValue = element.value;
+            if (previousElementValue !== elementValue) {
+                // Provide a way for tests to know exactly which event was processed
+                if (DEBUG && event) element['_ko_textInputProcessedEvent'] = event.type;
+                previousElementValue = elementValue;
+                ko.expressionRewriting.writeValueToProperty(valueAccessor(), allBindings, 'textInput', elementValue);
+            }
+        };
+
+        var deferUpdateModel = function (event) {
+            if (!timeoutHandle) {
+                // The elementValueBeforeEvent variable is set *only* during the brief gap between an
+                // event firing and the updateModel function running. This allows us to ignore model
+                // updates that are from the previous state of the element, usually due to techniques
+                // such as rateLimit. Such updates, if not ignored, can cause keystrokes to be lost.
+                elementValueBeforeEvent = element.value;
+                var handler = DEBUG ? updateModel.bind(element, {type: event.type}) : updateModel;
+                timeoutHandle = ko.utils.setTimeout(handler, 4);
+            }
+        };
+
+        // IE9 will mess up the DOM if you handle events synchronously which results in DOM changes (such as other bindings);
+        // so we'll make sure all updates are asynchronous
+        var ieUpdateModel = ko.utils.ieVersion == 9 ? deferUpdateModel : updateModel,
+            ourUpdate = false;
+
+        var updateView = function () {
+            var modelValue = ko.utils.unwrapObservable(valueAccessor());
+
+            if (modelValue === null || modelValue === undefined) {
+                modelValue = '';
+            }
+
+            if (elementValueBeforeEvent !== undefined && modelValue === elementValueBeforeEvent) {
+                ko.utils.setTimeout(updateView, 4);
+                return;
+            }
+
+            // Update the element only if the element and model are different. On some browsers, updating the value
+            // will move the cursor to the end of the input, which would be bad while the user is typing.
+            if (element.value !== modelValue) {
+                ourUpdate = true;  // Make sure we ignore events (propertychange) that result from updating the value
+                element.value = modelValue;
+                ourUpdate = false;
+                previousElementValue = element.value; // In case the browser changes the value (see #2281)
+            }
+        };
+
+        var onEvent = function (event, handler) {
+            ko.utils.registerEventHandler(element, event, handler);
+        };
+
+        if (DEBUG && ko.bindingHandlers['textInput']['_forceUpdateOn']) {
+            // Provide a way for tests to specify exactly which events are bound
+            ko.utils.arrayForEach(ko.bindingHandlers['textInput']['_forceUpdateOn'], function(eventName) {
+                if (eventName.slice(0,5) == 'after') {
+                    onEvent(eventName.slice(5), deferUpdateModel);
+                } else {
+                    onEvent(eventName, updateModel);
+                }
+            });
+        } else {
+            if (ieVersion) {
+                // All versions (including 11) of Internet Explorer have a bug that they don't generate an input or propertychange event when ESC is pressed
+                onEvent('keypress', updateModel);
+            }
+            if (ieVersion < 11) {
+                // Internet Explorer <= 8 doesn't support the 'input' event, but does include 'propertychange' that fires whenever
+                // any property of an element changes. Unlike 'input', it also fires if a property is changed from JavaScript code,
+                // but that's an acceptable compromise for this binding. IE 9 and 10 support 'input', but since they don't always
+                // fire it when using autocomplete, we'll use 'propertychange' for them also.
+                onEvent('propertychange', function(event) {
+                    if (!ourUpdate && event.propertyName === 'value') {
+                        ieUpdateModel(event);
+                    }
+                });
+            }
+            if (ieVersion == 8) {
+                // IE 8 has a bug where it fails to fire 'propertychange' on the first update following a value change from
+                // JavaScript code. It also doesn't fire if you clear the entire value. To fix this, we bind to the following
+                // events too.
+                onEvent('keyup', updateModel);      // A single keystoke
+                onEvent('keydown', updateModel);    // The first character when a key is held down
+            }
+            if (registerForSelectionChangeEvent) {
+                // Internet Explorer 9 doesn't fire the 'input' event when deleting text, including using
+                // the backspace, delete, or ctrl-x keys, clicking the 'x' to clear the input, dragging text
+                // out of the field, and cutting or deleting text using the context menu. 'selectionchange'
+                // can detect all of those except dragging text out of the field, for which we use 'dragend'.
+                // These are also needed in IE8 because of the bug described above.
+                registerForSelectionChangeEvent(element, ieUpdateModel);  // 'selectionchange' covers cut, paste, drop, delete, etc.
+                onEvent('dragend', deferUpdateModel);
+            }
+
+            if (!ieVersion || ieVersion >= 9) {
+                // All other supported browsers support the 'input' event, which fires whenever the content of the element is changed
+                // through the user interface.
+                onEvent('input', ieUpdateModel);
+            }
+
+            if (safariVersion < 5 && ko.utils.tagNameLower(element) === "textarea") {
+                // Safari <5 doesn't fire the 'input' event for <textarea> elements (it does fire 'textInput'
+                // but only when typing). So we'll just catch as much as we can with keydown, cut, and paste.
+                onEvent('keydown', deferUpdateModel);
+                onEvent('paste', deferUpdateModel);
+                onEvent('cut', deferUpdateModel);
+            } else if (operaVersion < 11) {
+                // Opera 10 doesn't always fire the 'input' event for cut, paste, undo & drop operations.
+                // We can try to catch some of those using 'keydown'.
+                onEvent('keydown', deferUpdateModel);
+            } else if (firefoxVersion < 4.0) {
+                // Firefox <= 3.6 doesn't fire the 'input' event when text is filled in through autocomplete
+                onEvent('DOMAutoComplete', updateModel);
+
+                // Firefox <=3.5 doesn't fire the 'input' event when text is dropped into the input.
+                onEvent('dragdrop', updateModel);       // <3.5
+                onEvent('drop', updateModel);           // 3.5
+            } else if (edgeVersion && element.type === "number") {
+                // Microsoft Edge doesn't fire 'input' or 'change' events for number inputs when
+                // the value is changed via the up / down arrow keys
+                onEvent('keydown', deferUpdateModel);
+            }
+        }
+
+        // Bind to the change event so that we can catch programmatic updates of the value that fire this event.
+        onEvent('change', updateModel);
+
+        // To deal with browsers that don't notify any kind of event for some changes (IE, Safari, etc.)
+        onEvent('blur', updateModel);
+
+        ko.computed(updateView, null, { disposeWhenNodeIsRemoved: element });
+    }
+};
+ko.expressionRewriting.twoWayBindings['textInput'] = true;
+
+// textinput is an alias for textInput
+ko.bindingHandlers['textinput'] = {
+    // preprocess is the only way to set up a full alias
+    'preprocess': function (value, name, addBinding) {
+        addBinding('textInput', value);
+    }
+};
+
+})();

vendors/knockout/src/binding/defaultBindings/uniqueName.js

@@ -0,0 +1,9 @@
+ko.bindingHandlers['uniqueName'] = {
+    'init': function (element, valueAccessor) {
+        if (valueAccessor()) {
+            var name = "ko_unique_" + (++ko.bindingHandlers['uniqueName'].currentIndex);
+            ko.utils.setElementName(element, name);
+        }
+    }
+};
+ko.bindingHandlers['uniqueName'].currentIndex = 0;

vendors/knockout/src/binding/defaultBindings/using.js

@@ -0,0 +1,15 @@
+ko.bindingHandlers['using'] = {
+    'init': function(element, valueAccessor, allBindings, viewModel, bindingContext) {
+        var options;
+
+        if (allBindings['has']('as')) {
+            options = { 'as': allBindings.get('as'), 'noChildContext': allBindings.get('noChildContext') };
+        }
+
+        var innerContext = bindingContext['createChildContext'](valueAccessor, options);
+        ko.applyBindingsToDescendants(innerContext, element);
+
+        return { 'controlsDescendantBindings': true };
+    }
+};
+ko.virtualElements.allowedBindings['using'] = true;

vendors/knockout/src/binding/defaultBindings/value.js

@@ -0,0 +1,130 @@
+ko.bindingHandlers['value'] = {
+    'init': function (element, valueAccessor, allBindings) {
+        var tagName = ko.utils.tagNameLower(element),
+            isInputElement = tagName == "input";
+
+        // If the value binding is placed on a radio/checkbox, then just pass through to checkedValue and quit
+        if (isInputElement && (element.type == "checkbox" || element.type == "radio")) {
+            ko.applyBindingAccessorsToNode(element, { 'checkedValue': valueAccessor });
+            return;
+        }
+
+        var eventsToCatch = [];
+        var requestedEventsToCatch = allBindings.get("valueUpdate");
+        var propertyChangedFired = false;
+        var elementValueBeforeEvent = null;
+
+        if (requestedEventsToCatch) {
+            // Allow both individual event names, and arrays of event names
+            if (typeof requestedEventsToCatch == "string") {
+                eventsToCatch = [requestedEventsToCatch];
+            } else {
+                eventsToCatch = ko.utils.arrayGetDistinctValues(requestedEventsToCatch);
+            }
+            ko.utils.arrayRemoveItem(eventsToCatch, "change");  // We'll subscribe to "change" events later
+        }
+
+        var valueUpdateHandler = function() {
+            elementValueBeforeEvent = null;
+            propertyChangedFired = false;
+            var modelValue = valueAccessor();
+            var elementValue = ko.selectExtensions.readValue(element);
+            ko.expressionRewriting.writeValueToProperty(modelValue, allBindings, 'value', elementValue);
+        }
+
+        // Workaround for https://github.com/SteveSanderson/knockout/issues/122
+        // IE doesn't fire "change" events on textboxes if the user selects a value from its autocomplete list
+        var ieAutoCompleteHackNeeded = ko.utils.ieVersion && isInputElement && element.type == "text"
+                                       && element.autocomplete != "off" && (!element.form || element.form.autocomplete != "off");
+        if (ieAutoCompleteHackNeeded && ko.utils.arrayIndexOf(eventsToCatch, "propertychange") == -1) {
+            ko.utils.registerEventHandler(element, "propertychange", function () { propertyChangedFired = true });
+            ko.utils.registerEventHandler(element, "focus", function () { propertyChangedFired = false });
+            ko.utils.registerEventHandler(element, "blur", function() {
+                if (propertyChangedFired) {
+                    valueUpdateHandler();
+                }
+            });
+        }
+
+        ko.utils.arrayForEach(eventsToCatch, function(eventName) {
+            // The syntax "after<eventname>" means "run the handler asynchronously after the event"
+            // This is useful, for example, to catch "keydown" events after the browser has updated the control
+            // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event)
+            var handler = valueUpdateHandler;
+            if (ko.utils.stringStartsWith(eventName, "after")) {
+                handler = function() {
+                    // The elementValueBeforeEvent variable is non-null *only* during the brief gap between
+                    // a keyX event firing and the valueUpdateHandler running, which is scheduled to happen
+                    // at the earliest asynchronous opportunity. We store this temporary information so that
+                    // if, between keyX and valueUpdateHandler, the underlying model value changes separately,
+                    // we can overwrite that model value change with the value the user just typed. Otherwise,
+                    // techniques like rateLimit can trigger model changes at critical moments that will
+                    // override the user's inputs, causing keystrokes to be lost.
+                    elementValueBeforeEvent = ko.selectExtensions.readValue(element);
+                    ko.utils.setTimeout(valueUpdateHandler, 0);
+                };
+                eventName = eventName.substring("after".length);
+            }
+            ko.utils.registerEventHandler(element, eventName, handler);
+        });
+
+        var updateFromModel;
+
+        if (isInputElement && element.type == "file") {
+            // For file input elements, can only write the empty string
+            updateFromModel = function () {
+                var newValue = ko.utils.unwrapObservable(valueAccessor());
+                if (newValue === null || newValue === undefined || newValue === "") {
+                    element.value = "";
+                } else {
+                    ko.dependencyDetection.ignore(valueUpdateHandler);  // reset the model to match the element
+                }
+            }
+        } else {
+            updateFromModel = function () {
+                var newValue = ko.utils.unwrapObservable(valueAccessor());
+                var elementValue = ko.selectExtensions.readValue(element);
+
+                if (elementValueBeforeEvent !== null && newValue === elementValueBeforeEvent) {
+                    ko.utils.setTimeout(updateFromModel, 0);
+                    return;
+                }
+
+                var valueHasChanged = newValue !== elementValue;
+
+                if (valueHasChanged || elementValue === undefined) {
+                    if (tagName === "select") {
+                        var allowUnset = allBindings.get('valueAllowUnset');
+                        ko.selectExtensions.writeValue(element, newValue, allowUnset);
+                        if (!allowUnset && newValue !== ko.selectExtensions.readValue(element)) {
+                            // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change,
+                            // because you're not allowed to have a model value that disagrees with a visible UI selection.
+                            ko.dependencyDetection.ignore(valueUpdateHandler);
+                        }
+                    } else {
+                        ko.selectExtensions.writeValue(element, newValue);
+                    }
+                }
+            };
+        }
+
+        if (tagName === "select") {
+            var updateFromModelComputed;
+            ko.bindingEvent.subscribe(element, ko.bindingEvent.childrenComplete, function () {
+                if (!updateFromModelComputed) {
+                    ko.utils.registerEventHandler(element, "change", valueUpdateHandler);
+                    updateFromModelComputed = ko.computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });
+                } else if (allBindings.get('valueAllowUnset')) {
+                    updateFromModel();
+                } else {
+                    valueUpdateHandler();
+                }
+            }, null, { 'notifyImmediately': true });
+        } else {
+            ko.utils.registerEventHandler(element, "change", valueUpdateHandler);
+            ko.computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });
+        }
+    },
+    'update': function() {} // Keep for backwards compatibility with code that may have wrapped value binding
+};
+ko.expressionRewriting.twoWayBindings['value'] = true;

vendors/knockout/src/binding/defaultBindings/visibleHidden.js

@@ -0,0 +1,16 @@
+ko.bindingHandlers['visible'] = {
+    'update': function (element, valueAccessor) {
+        var value = ko.utils.unwrapObservable(valueAccessor());
+        var isCurrentlyVisible = !(element.style.display == "none");
+        if (value && !isCurrentlyVisible)
+            element.style.display = "";
+        else if ((!value) && isCurrentlyVisible)
+            element.style.display = "none";
+    }
+};
+
+ko.bindingHandlers['hidden'] = {
+    'update': function (element, valueAccessor) {
+        ko.bindingHandlers['visible']['update'](element, function() { return !ko.utils.unwrapObservable(valueAccessor()) });
+    }
+};

vendors/knockout/src/binding/editDetection/arrayToDomNodeChildren.js

@@ -0,0 +1,237 @@
+(function () {
+    // Objective:
+    // * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,
+    //   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node
+    // * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node
+    //   so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we
+    //   previously mapped - retain those nodes, and just insert/delete other ones
+
+    // "callbackAfterAddingNodes" will be invoked after any "mapping"-generated nodes are inserted into the container node
+    // You can use this, for example, to activate bindings on those nodes.
+
+    function mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {
+        // Map this array value inside a dependentObservable so we re-map when any dependency changes
+        var mappedNodes = [];
+        var dependentObservable = ko.dependentObservable(function() {
+            var newMappedNodes = mapping(valueToMap, index, ko.utils.fixUpContinuousNodeArray(mappedNodes, containerNode)) || [];
+
+            // On subsequent evaluations, just replace the previously-inserted DOM nodes
+            if (mappedNodes.length > 0) {
+                ko.utils.replaceDomNodes(mappedNodes, newMappedNodes);
+                if (callbackAfterAddingNodes)
+                    ko.dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);
+            }
+
+            // Replace the contents of the mappedNodes array, thereby updating the record
+            // of which nodes would be deleted if valueToMap was itself later removed
+            mappedNodes.length = 0;
+            ko.utils.arrayPushAll(mappedNodes, newMappedNodes);
+        }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function() { return !ko.utils.anyDomNodeIsAttachedToDocument(mappedNodes); } });
+        return { mappedNodes : mappedNodes, dependentObservable : (dependentObservable.isActive() ? dependentObservable : undefined) };
+    }
+
+    var lastMappingResultDomDataKey = ko.utils.domData.nextKey(),
+        deletedItemDummyValue = ko.utils.domData.nextKey();
+
+    ko.utils.setDomNodeChildrenFromArrayMapping = function (domNode, array, mapping, options, callbackAfterAddingNodes, editScript) {
+        array = array || [];
+        if (typeof array.length == "undefined") // Coerce single value into array
+            array = [array];
+
+        options = options || {};
+        var lastMappingResult = ko.utils.domData.get(domNode, lastMappingResultDomDataKey);
+        var isFirstExecution = !lastMappingResult;
+
+        // Build the new mapping result
+        var newMappingResult = [];
+        var lastMappingResultIndex = 0;
+        var currentArrayIndex = 0;
+
+        var nodesToDelete = [];
+        var itemsToMoveFirstIndexes = [];
+        var itemsForBeforeRemoveCallbacks = [];
+        var itemsForMoveCallbacks = [];
+        var itemsForAfterAddCallbacks = [];
+        var mapData;
+        var countWaitingForRemove = 0;
+
+        function itemAdded(value) {
+            mapData = { arrayEntry: value, indexObservable: ko.observable(currentArrayIndex++) };
+            newMappingResult.push(mapData);
+            if (!isFirstExecution) {
+                itemsForAfterAddCallbacks.push(mapData);
+            }
+        }
+
+        function itemMovedOrRetained(oldPosition) {
+            mapData = lastMappingResult[oldPosition];
+            if (currentArrayIndex !== mapData.indexObservable.peek())
+                itemsForMoveCallbacks.push(mapData);
+            // Since updating the index might change the nodes, do so before calling fixUpContinuousNodeArray
+            mapData.indexObservable(currentArrayIndex++);
+            ko.utils.fixUpContinuousNodeArray(mapData.mappedNodes, domNode);
+            newMappingResult.push(mapData);
+        }
+
+        function callCallback(callback, items) {
+            if (callback) {
+                for (var i = 0, n = items.length; i < n; i++) {
+                    ko.utils.arrayForEach(items[i].mappedNodes, function(node) {
+                        callback(node, i, items[i].arrayEntry);
+                    });
+                }
+            }
+        }
+
+        if (isFirstExecution) {
+            ko.utils.arrayForEach(array, itemAdded);
+        } else {
+            if (!editScript || (lastMappingResult && lastMappingResult['_countWaitingForRemove'])) {
+                // Compare the provided array against the previous one
+                var lastArray = ko.utils.arrayMap(lastMappingResult, function (x) { return x.arrayEntry; }),
+                    compareOptions = {
+                        'dontLimitMoves': options['dontLimitMoves'],
+                        'sparse': true
+                    };
+                editScript = ko.utils.compareArrays(lastArray, array, compareOptions);
+            }
+
+            for (var i = 0, editScriptItem, movedIndex, itemIndex; editScriptItem = editScript[i]; i++) {
+                movedIndex = editScriptItem['moved'];
+                itemIndex = editScriptItem['index'];
+                switch (editScriptItem['status']) {
+                    case "deleted":
+                        while (lastMappingResultIndex < itemIndex) {
+                            itemMovedOrRetained(lastMappingResultIndex++);
+                        }
+                        if (movedIndex === undefined) {
+                            mapData = lastMappingResult[lastMappingResultIndex];
+
+                            // Stop tracking changes to the mapping for these nodes
+                            if (mapData.dependentObservable) {
+                                mapData.dependentObservable.dispose();
+                                mapData.dependentObservable = undefined;
+                            }
+
+                            // Queue these nodes for later removal
+                            if (ko.utils.fixUpContinuousNodeArray(mapData.mappedNodes, domNode).length) {
+                                if (options['beforeRemove']) {
+                                    newMappingResult.push(mapData);
+                                    countWaitingForRemove++;
+                                    if (mapData.arrayEntry === deletedItemDummyValue) {
+                                        mapData = null;
+                                    } else {
+                                        itemsForBeforeRemoveCallbacks.push(mapData);
+                                    }
+                                }
+                                if (mapData) {
+                                    nodesToDelete.push.apply(nodesToDelete, mapData.mappedNodes);
+                                }
+                            }
+                        }
+                        lastMappingResultIndex++;
+                        break;
+
+                    case "added":
+                        while (currentArrayIndex < itemIndex) {
+                            itemMovedOrRetained(lastMappingResultIndex++);
+                        }
+                        if (movedIndex !== undefined) {
+                            itemsToMoveFirstIndexes.push(newMappingResult.length);
+                            itemMovedOrRetained(movedIndex);
+                        } else {
+                            itemAdded(editScriptItem['value']);
+                        }
+                        break;
+                }
+            }
+
+            while (currentArrayIndex < array.length) {
+                itemMovedOrRetained(lastMappingResultIndex++);
+            }
+
+            // Record that the current view may still contain deleted items
+            // because it means we won't be able to use a provided editScript.
+            newMappingResult['_countWaitingForRemove'] = countWaitingForRemove;
+        }
+
+        // Store a copy of the array items we just considered so we can difference it next time
+        ko.utils.domData.set(domNode, lastMappingResultDomDataKey, newMappingResult);
+
+        // Call beforeMove first before any changes have been made to the DOM
+        callCallback(options['beforeMove'], itemsForMoveCallbacks);
+
+        // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)
+        ko.utils.arrayForEach(nodesToDelete, options['beforeRemove'] ? ko.cleanNode : ko.removeNode);
+
+        var i, j, lastNode, nodeToInsert, mappedNodes, activeElement;
+
+        // Since most browsers remove the focus from an element when it's moved to another location,
+        // save the focused element and try to restore it later.
+        try {
+            activeElement = domNode.ownerDocument.activeElement;
+        } catch(e) {
+            // IE9 throws if you access activeElement during page load (see issue #703)
+        }
+
+        // Try to reduce overall moved nodes by first moving the ones that were marked as moved by the edit script
+        if (itemsToMoveFirstIndexes.length) {
+            while ((i = itemsToMoveFirstIndexes.shift()) != undefined) {
+                mapData = newMappingResult[i];
+                for (lastNode = undefined; i; ) {
+                    if ((mappedNodes = newMappingResult[--i].mappedNodes) && mappedNodes.length) {
+                        lastNode = mappedNodes[mappedNodes.length-1];
+                        break;
+                    }
+                }
+                for (j = 0; nodeToInsert = mapData.mappedNodes[j]; lastNode = nodeToInsert, j++) {
+                    ko.virtualElements.insertAfter(domNode, nodeToInsert, lastNode);
+                }
+            }
+        }
+
+        // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)
+        for (i = 0; mapData = newMappingResult[i]; i++) {
+            // Get nodes for newly added items
+            if (!mapData.mappedNodes)
+                ko.utils.extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));
+
+            // Put nodes in the right place if they aren't there already
+            for (j = 0; nodeToInsert = mapData.mappedNodes[j]; lastNode = nodeToInsert, j++) {
+                ko.virtualElements.insertAfter(domNode, nodeToInsert, lastNode);
+            }
+
+            // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)
+            if (!mapData.initialized && callbackAfterAddingNodes) {
+                callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);
+                mapData.initialized = true;
+                lastNode = mapData.mappedNodes[mapData.mappedNodes.length - 1];     // get the last node again since it may have been changed by a preprocessor
+            }
+        }
+
+        // Restore the focused element if it had lost focus
+        if (activeElement && domNode.ownerDocument.activeElement != activeElement) {
+            activeElement.focus();
+        }
+
+        // If there's a beforeRemove callback, call it after reordering.
+        // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using
+        // some sort of animation, which is why we first reorder the nodes that will be removed. If the
+        // callback instead removes the nodes right away, it would be more efficient to skip reordering them.
+        // Perhaps we'll make that change in the future if this scenario becomes more common.
+        callCallback(options['beforeRemove'], itemsForBeforeRemoveCallbacks);
+
+        // Replace the stored values of deleted items with a dummy value. This provides two benefits: it marks this item
+        // as already "removed" so we won't call beforeRemove for it again, and it ensures that the item won't match up
+        // with an actual item in the array and appear as "retained" or "moved".
+        for (i = 0; i < itemsForBeforeRemoveCallbacks.length; ++i) {
+            itemsForBeforeRemoveCallbacks[i].arrayEntry = deletedItemDummyValue;
+        }
+
+        // Finally call afterMove and afterAdd callbacks
+        callCallback(options['afterMove'], itemsForMoveCallbacks);
+        callCallback(options['afterAdd'], itemsForAfterAddCallbacks);
+    }
+})();
+
+ko.exportSymbol('utils.setDomNodeChildrenFromArrayMapping', ko.utils.setDomNodeChildrenFromArrayMapping);

vendors/knockout/src/binding/editDetection/compareArrays.js

@@ -0,0 +1,102 @@
+// Go through the items that have been added and deleted and try to find matches between them.
+ko.utils.findMovesInArrayComparison = function (left, right, limitFailedCompares) {
+    if (left.length && right.length) {
+        var failedCompares, l, r, leftItem, rightItem;
+        for (failedCompares = l = 0; (!limitFailedCompares || failedCompares < limitFailedCompares) && (leftItem = left[l]); ++l) {
+            for (r = 0; rightItem = right[r]; ++r) {
+                if (leftItem['value'] === rightItem['value']) {
+                    leftItem['moved'] = rightItem['index'];
+                    rightItem['moved'] = leftItem['index'];
+                    right.splice(r, 1);         // This item is marked as moved; so remove it from right list
+                    failedCompares = r = 0;     // Reset failed compares count because we're checking for consecutive failures
+                    break;
+                }
+            }
+            failedCompares += r;
+        }
+    }
+};
+
+ko.utils.compareArrays = (function () {
+    var statusNotInOld = 'added', statusNotInNew = 'deleted';
+
+    // Simple calculation based on Levenshtein distance.
+    function compareArrays(oldArray, newArray, options) {
+        // For backward compatibility, if the third arg is actually a bool, interpret
+        // it as the old parameter 'dontLimitMoves'. Newer code should use { dontLimitMoves: true }.
+        options = (typeof options === 'boolean') ? { 'dontLimitMoves': options } : (options || {});
+        oldArray = oldArray || [];
+        newArray = newArray || [];
+
+        if (oldArray.length < newArray.length)
+            return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, options);
+        else
+            return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, options);
+    }
+
+    function compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, options) {
+        var myMin = Math.min,
+            myMax = Math.max,
+            editDistanceMatrix = [],
+            smlIndex, smlIndexMax = smlArray.length,
+            bigIndex, bigIndexMax = bigArray.length,
+            compareRange = (bigIndexMax - smlIndexMax) || 1,
+            maxDistance = smlIndexMax + bigIndexMax + 1,
+            thisRow, lastRow,
+            bigIndexMaxForRow, bigIndexMinForRow;
+
+        for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {
+            lastRow = thisRow;
+            editDistanceMatrix.push(thisRow = []);
+            bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);
+            bigIndexMinForRow = myMax(0, smlIndex - 1);
+            for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {
+                if (!bigIndex)
+                    thisRow[bigIndex] = smlIndex + 1;
+                else if (!smlIndex)  // Top row - transform empty array into new array via additions
+                    thisRow[bigIndex] = bigIndex + 1;
+                else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])
+                    thisRow[bigIndex] = lastRow[bigIndex - 1];                  // copy value (no edit)
+                else {
+                    var northDistance = lastRow[bigIndex] || maxDistance;       // not in big (deletion)
+                    var westDistance = thisRow[bigIndex - 1] || maxDistance;    // not in small (addition)
+                    thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;
+                }
+            }
+        }
+
+        var editScript = [], meMinusOne, notInSml = [], notInBig = [];
+        for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {
+            meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;
+            if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) {
+                notInSml.push(editScript[editScript.length] = {     // added
+                    'status': statusNotInSml,
+                    'value': bigArray[--bigIndex],
+                    'index': bigIndex });
+            } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {
+                notInBig.push(editScript[editScript.length] = {     // deleted
+                    'status': statusNotInBig,
+                    'value': smlArray[--smlIndex],
+                    'index': smlIndex });
+            } else {
+                --bigIndex;
+                --smlIndex;
+                if (!options['sparse']) {
+                    editScript.push({
+                        'status': "retained",
+                        'value': bigArray[bigIndex] });
+                }
+            }
+        }
+
+        // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of
+        // smlIndexMax keeps the time complexity of this algorithm linear.
+        ko.utils.findMovesInArrayComparison(notInBig, notInSml, !options['dontLimitMoves'] && smlIndexMax * 10);
+
+        return editScript.reverse();
+    }
+
+    return compareArrays;
+})();
+
+ko.exportSymbol('utils.compareArrays', ko.utils.compareArrays);

vendors/knockout/src/binding/expressionRewriting.js

@@ -0,0 +1,210 @@
+ko.expressionRewriting = (function () {
+    var javaScriptReservedWords = ["true", "false", "null", "undefined"];
+
+    // Matches something that can be assigned to--either an isolated identifier or something ending with a property accessor
+    // This is designed to be simple and avoid false negatives, but could produce false positives (e.g., a+b.c).
+    // This also will not properly handle nested brackets (e.g., obj1[obj2['prop']]; see #911).
+    var javaScriptAssignmentTarget = /^(?:[$_a-z][$\w]*|(.+)(\.\s*[$_a-z][$\w]*|\[.+\]))$/i;
+
+    function getWriteableValue(expression) {
+        if (ko.utils.arrayIndexOf(javaScriptReservedWords, expression) >= 0)
+            return false;
+        var match = expression.match(javaScriptAssignmentTarget);
+        return match === null ? false : match[1] ? ('Object(' + match[1] + ')' + match[2]) : expression;
+    }
+
+    // The following regular expressions will be used to split an object-literal string into tokens
+
+    var specials = ',"\'`{}()/:[\\]',    // These characters have special meaning to the parser and must not appear in the middle of a token, except as part of a string.
+        // Create the actual regular expression by or-ing the following regex strings. The order is important.
+        bindingToken = RegExp([
+            // These match strings, either with double quotes, single quotes, or backticks
+            '"(?:\\\\.|[^"])*"',
+            "'(?:\\\\.|[^'])*'",
+            "`(?:\\\\.|[^`])*`",
+            // Match C style comments
+            "/\\*(?:[^*]|\\*+[^*/])*\\*+/",
+            // Match C++ style comments
+            "//.*\n",
+            // Match a regular expression (text enclosed by slashes), but will also match sets of divisions
+            // as a regular expression (this is handled by the parsing loop below).
+            '/(?:\\\\.|[^/])+/\w*',
+            // Match text (at least two characters) that does not contain any of the above special characters,
+            // although some of the special characters are allowed to start it (all but the colon and comma).
+            // The text can contain spaces, but leading or trailing spaces are skipped.
+            '[^\\s:,/][^' + specials + ']*[^\\s' + specials + ']',
+            // Match any non-space character not matched already. This will match colons and commas, since they're
+            // not matched by "everyThingElse", but will also match any other single character that wasn't already
+            // matched (for example: in "a: 1, b: 2", each of the non-space characters will be matched by oneNotSpace).
+            '[^\\s]'
+        ].join('|'), 'g'),
+
+        // Match end of previous token to determine whether a slash is a division or regex.
+        divisionLookBehind = /[\])"'A-Za-z0-9_$]+$/,
+        keywordRegexLookBehind = {'in':1,'return':1,'typeof':1};
+
+    function parseObjectLiteral(objectLiteralString) {
+        // Trim leading and trailing spaces from the string
+        var str = ko.utils.stringTrim(objectLiteralString);
+
+        // Trim braces '{' surrounding the whole object literal
+        if (str.charCodeAt(0) === 123) str = str.slice(1, -1);
+
+        // Add a newline to correctly match a C++ style comment at the end of the string and
+        // add a comma so that we don't need a separate code block to deal with the last item
+        str += "\n,";
+
+        // Split into tokens
+        var result = [], toks = str.match(bindingToken), key, values = [], depth = 0;
+
+        if (toks.length > 1) {
+            for (var i = 0, tok; tok = toks[i]; ++i) {
+                var c = tok.charCodeAt(0);
+                // A comma signals the end of a key/value pair if depth is zero
+                if (c === 44) { // ","
+                    if (depth <= 0) {
+                        result.push((key && values.length) ? {key: key, value: values.join('')} : {'unknown': key || values.join('')});
+                        key = depth = 0;
+                        values = [];
+                        continue;
+                    }
+                // Simply skip the colon that separates the name and value
+                } else if (c === 58) { // ":"
+                    if (!depth && !key && values.length === 1) {
+                        key = values.pop();
+                        continue;
+                    }
+                // Comments: skip them
+                } else if (c === 47 && tok.length > 1 && (tok.charCodeAt(1) === 47 || tok.charCodeAt(1) === 42)) {  // "//" or "/*"
+                    continue;
+                // A set of slashes is initially matched as a regular expression, but could be division
+                } else if (c === 47 && i && tok.length > 1) {  // "/"
+                    // Look at the end of the previous token to determine if the slash is actually division
+                    var match = toks[i-1].match(divisionLookBehind);
+                    if (match && !keywordRegexLookBehind[match[0]]) {
+                        // The slash is actually a division punctuator; re-parse the remainder of the string (not including the slash)
+                        str = str.substr(str.indexOf(tok) + 1);
+                        toks = str.match(bindingToken);
+                        i = -1;
+                        // Continue with just the slash
+                        tok = '/';
+                    }
+                // Increment depth for parentheses, braces, and brackets so that interior commas are ignored
+                } else if (c === 40 || c === 123 || c === 91) { // '(', '{', '['
+                    ++depth;
+                } else if (c === 41 || c === 125 || c === 93) { // ')', '}', ']'
+                    --depth;
+                // The key will be the first token; if it's a string, trim the quotes
+                } else if (!key && !values.length && (c === 34 || c === 39)) { // '"', "'"
+                    tok = tok.slice(1, -1);
+                }
+                values.push(tok);
+            }
+            if (depth > 0) {
+                throw Error("Unbalanced parentheses, braces, or brackets");
+            }
+        }
+        return result;
+    }
+
+    // Two-way bindings include a write function that allow the handler to update the value even if it's not an observable.
+    var twoWayBindings = {};
+
+    function preProcessBindings(bindingsStringOrKeyValueArray, bindingOptions) {
+        bindingOptions = bindingOptions || {};
+
+        function processKeyValue(key, val) {
+            var writableVal;
+            function callPreprocessHook(obj) {
+                return (obj && obj['preprocess']) ? (val = obj['preprocess'](val, key, processKeyValue)) : true;
+            }
+            if (!bindingParams) {
+                if (!callPreprocessHook(ko['getBindingHandler'](key)))
+                    return;
+
+                if (twoWayBindings[key] && (writableVal = getWriteableValue(val))) {
+                    // For two-way bindings, provide a write method in case the value
+                    // isn't a writable observable.
+                    var writeKey = typeof twoWayBindings[key] == 'string' ? twoWayBindings[key] : key;
+                    propertyAccessorResultStrings.push("'" + writeKey + "':function(_z){" + writableVal + "=_z}");
+                }
+            }
+            // Values are wrapped in a function so that each value can be accessed independently
+            if (makeValueAccessors) {
+                val = 'function(){return ' + val + ' }';
+            }
+            resultStrings.push("'" + key + "':" + val);
+        }
+
+        var resultStrings = [],
+            propertyAccessorResultStrings = [],
+            makeValueAccessors = bindingOptions['valueAccessors'],
+            bindingParams = bindingOptions['bindingParams'],
+            keyValueArray = typeof bindingsStringOrKeyValueArray === "string" ?
+                parseObjectLiteral(bindingsStringOrKeyValueArray) : bindingsStringOrKeyValueArray;
+
+        ko.utils.arrayForEach(keyValueArray, function(keyValue) {
+            processKeyValue(keyValue.key || keyValue['unknown'], keyValue.value);
+        });
+
+        if (propertyAccessorResultStrings.length)
+            processKeyValue('_ko_property_writers', "{" + propertyAccessorResultStrings.join(",") + " }");
+
+        return resultStrings.join(",");
+    }
+
+    return {
+        bindingRewriteValidators: [],
+
+        twoWayBindings: twoWayBindings,
+
+        parseObjectLiteral: parseObjectLiteral,
+
+        preProcessBindings: preProcessBindings,
+
+        keyValueArrayContainsKey: function(keyValueArray, key) {
+            for (var i = 0; i < keyValueArray.length; i++)
+                if (keyValueArray[i]['key'] == key)
+                    return true;
+            return false;
+        },
+
+        // Internal, private KO utility for updating model properties from within bindings
+        // property:            If the property being updated is (or might be) an observable, pass it here
+        //                      If it turns out to be a writable observable, it will be written to directly
+        // allBindings:         An object with a get method to retrieve bindings in the current execution context.
+        //                      This will be searched for a '_ko_property_writers' property in case you're writing to a non-observable
+        // key:                 The key identifying the property to be written. Example: for { hasFocus: myValue }, write to 'myValue' by specifying the key 'hasFocus'
+        // value:               The value to be written
+        // checkIfDifferent:    If true, and if the property being written is a writable observable, the value will only be written if
+        //                      it is !== existing value on that writable observable
+        writeValueToProperty: function(property, allBindings, key, value, checkIfDifferent) {
+            if (!property || !ko.isObservable(property)) {
+                var propWriters = allBindings.get('_ko_property_writers');
+                if (propWriters && propWriters[key])
+                    propWriters[key](value);
+            } else if (ko.isWriteableObservable(property) && (!checkIfDifferent || property.peek() !== value)) {
+                property(value);
+            }
+        }
+    };
+})();
+
+ko.exportSymbol('expressionRewriting', ko.expressionRewriting);
+ko.exportSymbol('expressionRewriting.bindingRewriteValidators', ko.expressionRewriting.bindingRewriteValidators);
+ko.exportSymbol('expressionRewriting.parseObjectLiteral', ko.expressionRewriting.parseObjectLiteral);
+ko.exportSymbol('expressionRewriting.preProcessBindings', ko.expressionRewriting.preProcessBindings);
+
+// Making bindings explicitly declare themselves as "two way" isn't ideal in the long term (it would be better if
+// all bindings could use an official 'property writer' API without needing to declare that they might). However,
+// since this is not, and has never been, a public API (_ko_property_writers was never documented), it's acceptable
+// as an internal implementation detail in the short term.
+// For those developers who rely on _ko_property_writers in their custom bindings, we expose _twoWayBindings as an
+// undocumented feature that makes it relatively easy to upgrade to KO 3.0. However, this is still not an official
+// public API, and we reserve the right to remove it at any time if we create a real public property writers API.
+ko.exportSymbol('expressionRewriting._twoWayBindings', ko.expressionRewriting.twoWayBindings);
+
+// For backward compatibility, define the following aliases. (Previously, these function names were misleading because
+// they referred to JSON specifically, even though they actually work with arbitrary JavaScript object literal expressions.)
+ko.exportSymbol('jsonExpressionRewriting', ko.expressionRewriting);
+ko.exportSymbol('jsonExpressionRewriting.insertPropertyAccessorsIntoJson', ko.expressionRewriting.preProcessBindings);

vendors/knockout/src/binding/selectExtensions.js

@@ -0,0 +1,78 @@
+(function () {
+    var hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__';
+
+    // Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values
+    // are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values
+    // that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns.
+    ko.selectExtensions = {
+        readValue : function(element) {
+            switch (ko.utils.tagNameLower(element)) {
+                case 'option':
+                    if (element[hasDomDataExpandoProperty] === true)
+                        return ko.utils.domData.get(element, ko.bindingHandlers.options.optionValueDomDataKey);
+                    return ko.utils.ieVersion <= 7
+                        ? (element.getAttributeNode('value') && element.getAttributeNode('value').specified ? element.value : element.text)
+                        : element.value;
+                case 'select':
+                    return element.selectedIndex >= 0 ? ko.selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;
+                default:
+                    return element.value;
+            }
+        },
+
+        writeValue: function(element, value, allowUnset) {
+            switch (ko.utils.tagNameLower(element)) {
+                case 'option':
+                    if (typeof value === "string") {
+                        ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, undefined);
+                        if (hasDomDataExpandoProperty in element) { // IE <= 8 throws errors if you delete non-existent properties from a DOM node
+                            delete element[hasDomDataExpandoProperty];
+                        }
+                        element.value = value;
+                    }
+                    else {
+                        // Store arbitrary object using DomData
+                        ko.utils.domData.set(element, ko.bindingHandlers.options.optionValueDomDataKey, value);
+                        element[hasDomDataExpandoProperty] = true;
+
+                        // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value.
+                        element.value = typeof value === "number" ? value : "";
+                    }
+                    break;
+                case 'select':
+                    if (value === "" || value === null)       // A blank string or null value will select the caption
+                        value = undefined;
+                    var selection = -1;
+                    for (var i = 0, n = element.options.length, optionValue; i < n; ++i) {
+                        optionValue = ko.selectExtensions.readValue(element.options[i]);
+                        // Include special check to handle selecting a caption with a blank string value
+                        if (optionValue == value || (optionValue === "" && value === undefined)) {
+                            selection = i;
+                            break;
+                        }
+                    }
+                    if (allowUnset || selection >= 0 || (value === undefined && element.size > 1)) {
+                        element.selectedIndex = selection;
+                        if (ko.utils.ieVersion === 6) {
+                            // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread
+                            // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread
+                            // to apply the value as well.
+                            ko.utils.setTimeout(function () {
+                                element.selectedIndex = selection;
+                            }, 0);
+                        }
+                    }
+                    break;
+                default:
+                    if ((value === null) || (value === undefined))
+                        value = "";
+                    element.value = value;
+                    break;
+            }
+        }
+    };
+})();
+
+ko.exportSymbol('selectExtensions', ko.selectExtensions);
+ko.exportSymbol('selectExtensions.readValue', ko.selectExtensions.readValue);
+ko.exportSymbol('selectExtensions.writeValue', ko.selectExtensions.writeValue);