mirror of
https://github.com/the-djmaze/snappymail.git
synced 2026-07-10 06:58:27 +03:00
Speedup KnockoutJS by simplifying components loader system.
Custom loaders are not used, so it is removed
This commit is contained in:
djmaze
parent
4142526ba6
commit
bcc3dc51ef
5 changed files with 286 additions and 620 deletions
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@ -23,7 +23,7 @@ knockoutDebugCallback([
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'src/binding/bindingProvider.js',
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'src/binding/bindingAttributeSyntax.js',
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'src/components/loaderRegistry.js',
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'src/components/defaultLoader.js',
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// 'src/components/defaultLoader.js',
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// 'src/components/customElements.js',
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'src/components/componentBinding.js',
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'src/binding/defaultBindings/attr.js',
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@ -2320,145 +2320,64 @@ ko.expressionRewriting = (() => {
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ko.exportSymbol('dataFor', ko.dataFor);
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})();
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(() => {
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var loadingSubscribablesCache = {}, // Tracks component loads that are currently in flight
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loadedDefinitionsCache = {}; // Tracks component loads that have already completed
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var loadingSubscribablesCache = Object.create(null), // Tracks component loads that are currently in flight
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loadedDefinitionsCache = Object.create(null); // Tracks component loads that have already completed
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ko.components = {
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get: (componentName, callback) => {
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var cachedDefinition = getObjectOwnProperty(loadedDefinitionsCache, componentName);
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var cachedDefinition = loadedDefinitionsCache[componentName];
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if (cachedDefinition) {
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// It's already loaded and cached. Reuse the same definition object.
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// Note that for API consistency, even cache hits complete asynchronously by default.
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// You can bypass this by putting synchronous:true on your component config.
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if (cachedDefinition.isSynchronousComponent) {
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ko.dependencyDetection.ignore(() => // See comment in loaderRegistryBehaviors.js for reasoning
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callback(cachedDefinition.definition)
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);
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} else {
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ko.tasks.schedule(() => callback(cachedDefinition.definition) );
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}
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ko.tasks.schedule(() => callback(cachedDefinition.definition) );
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} else {
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// Join the loading process that is already underway, or start a new one.
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loadComponentAndNotify(componentName, callback);
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var subscribable = loadingSubscribablesCache[componentName],
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completedAsync;
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if (subscribable) {
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subscribable.subscribe(callback);
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} else {
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// It's not started loading yet. Start loading, and when it's done, move it to loadedDefinitionsCache.
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subscribable = loadingSubscribablesCache[componentName] = new ko.subscribable();
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subscribable.subscribe(callback);
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beginLoadingComponent(componentName, definition => {
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loadedDefinitionsCache[componentName] = { definition: definition };
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delete loadingSubscribablesCache[componentName];
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// For API consistency, all loads complete asynchronously. However we want to avoid
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// adding an extra task schedule if it's unnecessary (i.e., the completion is already
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// async).
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//
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// You can bypass the 'always asynchronous' feature by putting the synchronous:true
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// flag on your component configuration when you register it.
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if (completedAsync) {
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// Note that notifySubscribers ignores any dependencies read within the callback.
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// See comment in loaderRegistryBehaviors.js for reasoning
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subscribable['notifySubscribers'](definition);
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} else {
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ko.tasks.schedule(() => subscribable['notifySubscribers'](definition));
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}
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});
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completedAsync = true;
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}
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}
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},
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clearCachedDefinition: componentName =>
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delete loadedDefinitionsCache[componentName]
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,
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delete loadedDefinitionsCache[componentName],
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_getFirstResultFromLoaders: getFirstResultFromLoaders
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register: (componentName, config) => {
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if (!config) {
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throw new Error('Invalid configuration for ' + componentName);
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}
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if (defaultConfigRegistry[componentName]) {
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throw new Error('Component ' + componentName + ' is already registered');
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}
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defaultConfigRegistry[componentName] = config;
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}
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};
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function getObjectOwnProperty(obj, propName) {
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return Object.prototype.hasOwnProperty.call(obj, propName) ? obj[propName] : undefined;
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}
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function loadComponentAndNotify(componentName, callback) {
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var subscribable = getObjectOwnProperty(loadingSubscribablesCache, componentName),
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completedAsync;
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if (!subscribable) {
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// It's not started loading yet. Start loading, and when it's done, move it to loadedDefinitionsCache.
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subscribable = loadingSubscribablesCache[componentName] = new ko.subscribable();
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subscribable.subscribe(callback);
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beginLoadingComponent(componentName, (definition, config) => {
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var isSynchronousComponent = !!(config && config['synchronous']);
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loadedDefinitionsCache[componentName] = { definition: definition, isSynchronousComponent: isSynchronousComponent };
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delete loadingSubscribablesCache[componentName];
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// For API consistency, all loads complete asynchronously. However we want to avoid
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// adding an extra task schedule if it's unnecessary (i.e., the completion is already
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// async).
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//
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// You can bypass the 'always asynchronous' feature by putting the synchronous:true
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// flag on your component configuration when you register it.
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if (completedAsync || isSynchronousComponent) {
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// Note that notifySubscribers ignores any dependencies read within the callback.
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// See comment in loaderRegistryBehaviors.js for reasoning
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subscribable['notifySubscribers'](definition);
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} else {
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ko.tasks.schedule(() => subscribable['notifySubscribers'](definition));
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}
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});
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completedAsync = true;
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} else {
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subscribable.subscribe(callback);
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}
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}
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function beginLoadingComponent(componentName, callback) {
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getFirstResultFromLoaders('getConfig', [componentName], config => {
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if (config) {
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// We have a config, so now load its definition
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getFirstResultFromLoaders('loadComponent', [componentName, config], definition =>
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callback(definition, config)
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);
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} else {
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// The component has no config - it's unknown to all the loaders.
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// Note that this is not an error (e.g., a module loading error) - that would abort the
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// process and this callback would not run. For this callback to run, all loaders must
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// have confirmed they don't know about this component.
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callback(null, null);
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}
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});
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}
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function getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders) {
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// On the first call in the stack, start with the full set of loaders
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if (!candidateLoaders) {
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candidateLoaders = ko.components['loaders'].slice(0); // Use a copy, because we'll be mutating this array
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}
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// Try the next candidate
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var currentCandidateLoader = candidateLoaders.shift();
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if (currentCandidateLoader) {
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var methodInstance = currentCandidateLoader[methodName];
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if (methodInstance) {
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var wasAborted = false,
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synchronousReturnValue = methodInstance.apply(currentCandidateLoader, argsExceptCallback.concat(function(result) {
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if (wasAborted) {
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callback(null);
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} else if (result !== null) {
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// This candidate returned a value. Use it.
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callback(result);
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} else {
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// Try the next candidate
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getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);
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}
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}));
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// Currently, loaders may not return anything synchronously. This leaves open the possibility
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// that we'll extend the API to support synchronous return values in the future. It won't be
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// a breaking change, because currently no loader is allowed to return anything except undefined.
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if (synchronousReturnValue !== undefined) {
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wasAborted = true;
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// Method to suppress exceptions will remain undocumented. This is only to keep
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// KO's specs running tidily, since we can observe the loading got aborted without
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// having exceptions cluttering up the console too.
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if (!currentCandidateLoader['suppressLoaderExceptions']) {
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throw new Error('Component loaders must supply values by invoking the callback, not by returning values synchronously.');
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}
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}
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} else {
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// This candidate doesn't have the relevant handler. Synchronously move on to the next one.
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getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);
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}
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} else {
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// No candidates returned a value
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callback(null);
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}
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}
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// Reference the loaders via string name so it's possible for developers
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// to replace the whole array by assigning to ko.components.loaders
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ko.components['loaders'] = [];
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ko.exportSymbol('components', ko.components);
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})();
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(() => {
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// The default loader is responsible for two things:
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// 1. Maintaining the default in-memory registry of component configuration objects
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// (i.e., the thing you're writing to when you call ko.components.register(someName, ...))
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@ -2469,158 +2388,73 @@ ko.expressionRewriting = (() => {
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// 1. To supply configuration objects from some other source (e.g., conventions)
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// 2. Or, to resolve configuration objects by loading viewmodels/templates via arbitrary logic.
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var defaultConfigRegistry = {};
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ko.components.register = (componentName, config) => {
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if (!config) {
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throw new Error('Invalid configuration for ' + componentName);
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}
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if (ko.components.isRegistered(componentName)) {
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throw new Error('Component ' + componentName + ' is already registered');
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}
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defaultConfigRegistry[componentName] = config;
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};
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ko.components.isRegistered = componentName =>
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Object.prototype.hasOwnProperty.call(defaultConfigRegistry, componentName);
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ko.components.unregister = componentName => {
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delete defaultConfigRegistry[componentName];
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ko.components.clearCachedDefinition(componentName);
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};
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ko.components.defaultLoader = {
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'getConfig': (componentName, callback) => {
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var result = ko.components.isRegistered(componentName)
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? defaultConfigRegistry[componentName]
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: null;
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callback(result);
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},
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'loadComponent': (componentName, config, callback) => {
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var errorCallback = makeErrorCallback(componentName);
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resolveConfig(componentName, errorCallback, config, callback);
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},
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'loadTemplate': (componentName, templateConfig, callback) =>
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resolveTemplate(makeErrorCallback(componentName), templateConfig, callback)
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,
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'loadViewModel': (componentName, viewModelConfig, callback) =>
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resolveViewModel(makeErrorCallback(componentName), viewModelConfig, callback)
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};
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var defaultConfigRegistry = Object.create(null);
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var createViewModelKey = 'createViewModel';
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// Takes a config object of the form { template: ..., viewModel: ... }, and asynchronously convert it
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// into the standard component definition format:
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// { template: <ArrayOfDomNodes>, createViewModel: function(params, componentInfo) { ... } }.
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// Since both template and viewModel may need to be resolved asynchronously, both tasks are performed
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// in parallel, and the results joined when both are ready. We don't depend on any promises infrastructure,
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// so this is implemented manually below.
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function resolveConfig(componentName, errorCallback, config, callback) {
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var result = {},
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makeCallBackWhenZero = 2,
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tryIssueCallback = () => {
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if (--makeCallBackWhenZero === 0) {
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callback(result);
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}
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},
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templateConfig = config['template'],
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viewModelConfig = config['viewModel'];
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// Takes a config object of the form { template: ..., viewModel: ... }, and asynchronously convert it
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// into the standard component definition format:
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// { template: <ArrayOfDomNodes>, createViewModel: function(params, componentInfo) { ... } }.
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// Since both template and viewModel may need to be resolved asynchronously, both tasks are performed
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// in parallel, and the results joined when both are ready. We don't depend on any promises infrastructure,
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// so this is implemented manually below.
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function loadComponent(componentName, callback) {
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var result = {},
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config = defaultConfigRegistry[componentName] || {},
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templateConfig = config['template'],
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viewModelConfig = config['viewModel'];
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if (templateConfig) {
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ko.components._getFirstResultFromLoaders('loadTemplate', [componentName, templateConfig], resolvedTemplate => {
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result['template'] = resolvedTemplate;
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tryIssueCallback();
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});
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} else {
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tryIssueCallback();
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}
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if (templateConfig) {
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if (!templateConfig['element']) {
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throwError(componentName, 'Unknown template value: ' + templateConfig);
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}
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// Element ID - find it, then copy its child nodes
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var element = templateConfig['element'];
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var elemInstance = document.getElementById(element);
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if (!elemInstance) {
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throwError(componentName, 'Cannot find element with ID ' + element);
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}
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if (!elemInstance.matches('TEMPLATE')) {
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throwError(componentName, 'Template Source Element not a <template>');
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}
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// For browsers with proper <template> element support (i.e., where the .content property
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// gives a document fragment), use that document fragment.
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result['template'] = ko.utils.cloneNodes(elemInstance.content.childNodes);
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}
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if (viewModelConfig) {
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ko.components._getFirstResultFromLoaders('loadViewModel', [componentName, viewModelConfig], resolvedViewModel => {
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result[createViewModelKey] = resolvedViewModel;
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tryIssueCallback();
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});
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} else {
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tryIssueCallback();
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if (viewModelConfig) {
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if (typeof viewModelConfig[createViewModelKey] !== 'function') {
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throwError(componentName, 'Unknown viewModel value: ' + viewModelConfig);
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}
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// Already a factory function - use it as-is
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result[createViewModelKey] = viewModelConfig[createViewModelKey];
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}
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if (result['template'] && result[createViewModelKey]) {
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callback(result);
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} else {
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callback(null);
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}
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}
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function throwError(componentName, message) {
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throw new Error(`Component '${componentName}': ${message}`)
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}
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function beginLoadingComponent(componentName, callback) {
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// Try the candidates
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var found = false;
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loadComponent(componentName, result => {
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// This candidate returned a value. Use it.
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(found = result != null) && callback(result);
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});
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if (!found) {
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// No candidates returned a value
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callback(null);
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}
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}
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function resolveTemplate(errorCallback, templateConfig, callback) {
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if (templateConfig instanceof Array) {
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// Assume already an array of DOM nodes - pass through unchanged
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callback(templateConfig);
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} else if (templateConfig instanceof DocumentFragment) {
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// Document fragment - use its child nodes
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callback([...templateConfig.childNodes]);
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} else if (templateConfig['element']) {
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var element = templateConfig['element'];
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if (element instanceof HTMLElement) {
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// Element instance - copy its child nodes
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callback(cloneNodesFromTemplateSourceElement(element));
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} else if (typeof element === 'string') {
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// Element ID - find it, then copy its child nodes
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var elemInstance = document.getElementById(element);
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if (elemInstance) {
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callback(cloneNodesFromTemplateSourceElement(elemInstance));
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} else {
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errorCallback('Cannot find element with ID ' + element);
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}
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} else {
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errorCallback('Unknown element type: ' + element);
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}
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} else {
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errorCallback('Unknown template value: ' + templateConfig);
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}
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}
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function resolveViewModel(errorCallback, viewModelConfig, callback) {
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if (typeof viewModelConfig === 'function') {
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// Constructor - convert to standard factory function format
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// By design, this does *not* supply componentInfo to the constructor, as the intent is that
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// componentInfo contains non-viewmodel data (e.g., the component's element) that should only
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// be used in factory functions, not viewmodel constructors.
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callback(params => new viewModelConfig(params));
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} else if (typeof viewModelConfig[createViewModelKey] === 'function') {
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// Already a factory function - use it as-is
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callback(viewModelConfig[createViewModelKey]);
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} else if ('instance' in viewModelConfig) {
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// Fixed object instance - promote to createViewModel format for API consistency
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var fixedInstance = viewModelConfig['instance'];
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callback(() => fixedInstance);
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} else if ('viewModel' in viewModelConfig) {
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// Resolved AMD module whose value is of the form { viewModel: ... }
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resolveViewModel(errorCallback, viewModelConfig['viewModel'], callback);
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} else {
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errorCallback('Unknown viewModel value: ' + viewModelConfig);
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}
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}
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function cloneNodesFromTemplateSourceElement(elemInstance) {
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if (elemInstance.matches('TEMPLATE')) {
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// For browsers with proper <template> element support (i.e., where the .content property
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// gives a document fragment), use that document fragment.
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if (elemInstance.content instanceof DocumentFragment) {
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return ko.utils.cloneNodes(elemInstance.content.childNodes);
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}
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}
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throw 'Template Source Element not a <template>';
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}
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function makeErrorCallback(componentName) {
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return message => {
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throw new Error('Component \'' + componentName + '\': ' + message)
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};
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}
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ko.exportSymbol('components', ko.components);
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ko.exportSymbol('components.register', ko.components.register);
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// By default, the default loader is the only registered component loader
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ko.components['loaders'].push(ko.components.defaultLoader);
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})();
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(() => {
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var componentLoadingOperationUniqueId = 0;
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144
vendors/knockout/build/output/knockout-latest.js
vendored
144
vendors/knockout/build/output/knockout-latest.js
vendored
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@ -4,76 +4,74 @@
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* License: MIT (http://www.opensource.org/licenses/mit-license.php)
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*/
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(A=>{function E(a,c){return null===a||ba[typeof a]?a===c:!1}function D(a,c){var f;return()=>{f||(f=setTimeout(()=>{f=0;a()},c))}}function I(a,c){var f;return()=>{clearTimeout(f);f=setTimeout(a,c)}}function P(a,c){null!==c&&c.m&&c.m()}function T(a,c){var f=this.$b,g=f[B];g.Z||(this.Ra&&this.ya[c]?(f.rb(c,a,this.ya[c]),this.ya[c]=null,--this.Ra):g.u[c]||f.rb(c,a,g.v?{T:a}:f.Qb(a)),a.ja&&a.Vb())}var Q=A.document,U={},b="undefined"!==typeof U?U:{};b.o=(a,c)=>{a=a.split(".");for(var f=b,g=0;g<a.length-
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1;g++)f=f[a[g]];f[a[a.length-1]]=c};b.Y=(a,c,f)=>{a[c]=f};b.o("version","3.5.1-sm");b.a={extend:(a,c)=>{c&&Object.entries(c).forEach(f=>a[f[0]]=f[1]);return a},M:(a,c)=>a&&Object.entries(a).forEach(f=>c(f[0],f[1])),yc:(a,c,f)=>{if(!a)return a;var g={};Object.entries(a).forEach(k=>g[k[0]]=c.call(f,k[1],k[0],a));return g},Va:a=>[...a.childNodes].forEach(c=>b.removeNode(c)),Jb:a=>{a=[...a];var c=(a[0]&&a[0].ownerDocument||Q).createElement("div");a.forEach(f=>c.append(b.ea(f)));return c},xa:(a,c)=>Array.prototype.map.call(a,
|
||||
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h}n&&b.l.za()&&(q=b.a.wa(b.h.childNodes(k),!0));m?(n||b.h.sa(k,b.a.wa(q)),b.tb(u,k)):(b.h.pa(k),b.c.notify(k,b.c.A))},{i:k});return{controlsDescendantBindings:!0}}};b.D.Na[c]=!1;b.h.aa[c]=!0}a("if");a("ifnot",!1,!0);a("with",!0)})();var W={};b.b.options={init:a=>{if(!a.matches("SELECT"))throw Error("options binding applies only to SELECT elements");for(;0<a.length;)a.remove(0);return{controlsDescendantBindings:!0}},update:(a,c,d)=>{function e(){return Array.from(a.options).filter(n=>n.selected)}function k(n,
|
||||
u,w){var v=typeof u;return"function"==v?u(n):"string"==v?n[u]:w}function r(n,u){l&&q?b.c.notify(a,b.c.A):p.length&&(n=p.includes(b.v.L(u[0])),u[0].selected=n,l&&!n&&b.l.M(b.a.Qb,null,[a,"change"]))}var g=a.multiple,f=0!=a.length&&g?a.scrollTop:null,h=b.a.g(c()),q=d.get("valueAllowUnset")&&d.has("value");c={};var p=[];q||(g?p=e().map(b.v.L):0<=a.selectedIndex&&p.push(b.v.L(a.options[a.selectedIndex])));if(h){"undefined"==typeof h.length&&(h=[h]);var t=h.filter(n=>n||null==n);d.has("optionsCaption")&&
|
||||
(h=b.a.g(d.get("optionsCaption")),null!==h&&void 0!==h&&t.unshift(W))}var l=!1;c.beforeRemove=n=>a.removeChild(n);h=r;d.has("optionsAfterRender")&&"function"==typeof d.get("optionsAfterRender")&&(h=(n,u)=>{r(n,u);b.l.M(d.get("optionsAfterRender"),null,[u[0],n!==W?n:void 0])});b.a.Mb(a,t,function(n,u,w){w.length&&(p=!q&&w[0].selected?[b.v.L(w[0])]:[],l=!0);u=a.ownerDocument.createElement("option");n===W?(b.a.eb(u,d.get("optionsCaption")),b.v.Ka(u,void 0)):(w=k(n,d.get("optionsValue"),n),b.v.Ka(u,b.a.g(w)),
|
||||
n=k(n,d.get("optionsText"),w),b.a.eb(u,n));return[u]},c,h);if(!q){var m;g?m=p.length&&e().length<p.length:m=p.length&&0<=a.selectedIndex?b.v.L(a.options[a.selectedIndex])!==p[0]:p.length||0<=a.selectedIndex;m&&b.l.M(b.a.Qb,null,[a,"change"])}(q||b.l.Za())&&b.c.notify(a,b.c.A);f&&20<Math.abs(f-a.scrollTop)&&(a.scrollTop=f)}};b.b.options.ab=b.a.f.U();b.b.style={update:(a,c)=>{c=b.a.g(c()||{});b.a.K(c,(d,e)=>{e=b.a.g(e);if(null==e||!1===e)e="";if(/^--/.test(d))a.style.setProperty(d,e);else{d=d.replace(/-(\w)/g,
|
||||
(r,g)=>g.toUpperCase());var k=a.style[d];a.style[d]=e;e===k||a.style[d]!=k||isNaN(e)||(a.style[d]=e+"px")}})}};b.b.submit={init:(a,c,d,e,k)=>{if("function"!=typeof c())throw Error("The value for a submit binding must be a function");a.addEventListener("submit",r=>{var g=c();try{var f=g.call(k.$data,a)}finally{!0!==f&&(r.preventDefault?r.preventDefault():r.returnValue=!1)}})}};b.b.text={init:()=>({controlsDescendantBindings:!0}),update:(a,c)=>{8===a.nodeType&&(a.text||a.after(a.text=Q.createTextNode("")),
|
||||
a=a.text);b.a.eb(a,c())}};b.h.aa.text=!0;b.b.textInput={init:(a,c,d)=>{var e=a.value,k,r,g=()=>{clearTimeout(k);r=k=void 0;var h=a.value;e!==h&&(e=h,b.D.jb(c(),d,"textInput",h))},f=()=>{var h=b.a.g(c());null==h&&(h="");void 0!==r&&h===r?setTimeout(f,4):a.value!==h&&(a.value=h,e=a.value)};a.addEventListener("input",g);a.addEventListener("change",g);a.addEventListener("blur",g);b.j(f,{i:a})}};b.D.hb.add("textInput");b.b.textinput={preprocess:(a,c,d)=>d("textInput",a)};b.b.value={init:(a,c,d)=>{var e=
|
||||
a.matches("SELECT"),k=a.matches("INPUT");if(!k||"checkbox"!=a.type&&"radio"!=a.type){var r=new Set,g=d.get("valueUpdate"),f=null;g&&("string"==typeof g?r.add(g):g.forEach(t=>r.add(t)),r.delete("change"));var h=()=>{f=null;var t=c(),l=b.v.L(a);b.D.jb(t,d,"value",l)};r.forEach(t=>{var l=h;(t||"").startsWith("after")&&(l=()=>{f=b.v.L(a);setTimeout(h,0)},t=t.substring(5));a.addEventListener(t,l)});var q=k&&"file"==a.type?()=>{var t=b.a.g(c());null==t||""===t?a.value="":b.l.M(h)}:()=>{var t=b.a.g(c()),
|
||||
l=b.v.L(a);if(null!==f&&t===f)setTimeout(q,0);else if(t!==l||void 0===l)e?(l=d.get("valueAllowUnset"),b.v.Ka(a,t,l),l||t===b.v.L(a)||b.l.M(h)):b.v.Ka(a,t)};if(e){var p;b.c.subscribe(a,b.c.A,()=>{p?d.get("valueAllowUnset")?q():h():(a.addEventListener("change",h),p=b.j(q,{i:a}))},null,{notifyImmediately:!0})}else a.addEventListener("change",h),b.j(q,{i:a})}else b.rb(a,{checkedValue:c})},update:()=>{}};b.D.hb.add("value");b.b.visible={update:(a,c)=>{c=b.a.g(c());var d="none"!=a.style.display;c&&!d?a.style.display=
|
||||
"":d&&!c&&(a.style.display="none")}};b.b.hidden={update:(a,c)=>a.hidden=!!b.a.g(c())};(function(a){b.b[a]={init:function(c,d,e,k,r){return b.b.event.init.call(this,c,()=>({[a]:d()}),e,k,r)}}})("click");(()=>{let a=b.a.f.U();class c{constructor(e){this.Sa=e}Ga(...e){let k=this.Sa;if(!e.length)return b.a.f.get(k,a)||(11===this.B?k.content:1===this.B?k:void 0);b.a.f.set(k,a,e[0])}}class d extends c{constructor(e){super(e);e&&(this.B=e.matches("TEMPLATE")&&e.content?e.content.nodeType:1)}}b.Ha={Sa:d,
|
||||
Ma:c}})();(()=>{function a(g,f){if(g.length){var h=g[0],q=h.parentNode;e(h,g[g.length-1],p=>{1!==p.nodeType&&8!==p.nodeType||b.sb(f,p)});b.a.ya(g,q)}}function c(g,f,h,q){var p=(g&&(g.nodeType?g:0<g.length?g[0]:null)||h||{}).ownerDocument;if("string"==typeof h){p=p||Q;p=p.getElementById(h);if(!p)throw Error("Cannot find template with ID "+h);h=new b.Ha.Sa(p)}else if([1,8].includes(h.nodeType))h=new b.Ha.Ma(h);else throw Error("Unknown template type: "+h);h=(h=h.Ga?h.Ga():null)?[...h.cloneNode(!0).childNodes]:
|
||||
null;if("number"!=typeof h.length||0<h.length&&"number"!=typeof h[0].nodeType)throw Error("Template engine must return an array of DOM nodes");p=!1;switch(f){case "replaceChildren":b.h.sa(g,h);p=!0;break;case "ignoreTargetNode":break;default:throw Error("Unknown renderMode: "+f);}p&&(a(h,q),"replaceChildren"==f&&b.c.notify(g,b.c.A));return h}function d(g,f,h){return b.N(g)?g():"function"===typeof g?g(f,h):g}var e=(g,f,h)=>{var q;for(f=b.h.nextSibling(f);g&&(q=g)!==f;)g=b.h.nextSibling(q),h(q,g)};
|
||||
b.oc=function(g,f,h,q){h=h||{};var p=p||"replaceChildren";if(q){var t=q.nodeType?q:0<q.length?q[0]:null;return b.j(()=>{var l=f&&f instanceof b.ca?f:new b.ca(f,null,null,null,{exportDependencies:!0}),m=d(g,l.$data,l);c(q,p,m,l,h)},{oa:()=>!t||!b.a.Ua(t),i:t})}console.log("no targetNodeOrNodeArray")};b.pc=(g,f,h,q,p)=>{function t(v,y){b.l.M(b.a.Mb,null,[q,v,n,h,u,y]);b.c.notify(q,b.c.A)}var l,m=h.as,n=(v,y)=>{l=p.createChildContext(v,{as:m,extend:x=>{x.$index=y;m&&(x[m+"Index"]=y)}});v=d(g,v,l);return c(q,
|
||||
"ignoreTargetNode",v,l,h)},u=(v,y)=>{a(y,l);l=null};if(!h.beforeRemove&&b.Fb(f)){t(f.F());var w=f.subscribe(v=>{t(f(),v)},null,"arrayChange");w.i(q);return w}return b.j(()=>{var v=b.a.g(f)||[];"undefined"==typeof v.length&&(v=[v]);t(v)},{i:q})};var k=b.a.f.U(),r=b.a.f.U();b.b.template={init:(g,f)=>{f=b.a.g(f());if("string"==typeof f||"name"in f)b.h.pa(g);else if("nodes"in f){f=f.nodes||[];if(b.N(f))throw Error('The "nodes" option must be a plain, non-observable array.');let h=f[0]&&f[0].parentNode;
|
||||
h&&b.a.f.get(h,r)||(h=b.a.Hb(f),b.a.f.set(h,r,!0));(new b.Ha.Ma(g)).Ga(h)}else if(f=b.h.childNodes(g),0<f.length)f=b.a.Hb(f),(new b.Ha.Ma(g)).Ga(f);else throw Error("Anonymous template defined, but no template content was provided");return{controlsDescendantBindings:!0}},update:(g,f,h,q,p)=>{var t=f();f=b.a.g(t);h=!0;q=null;"string"==typeof f?f={}:(t="name"in f?f.name:g,"if"in f&&(h=b.a.g(f["if"])),h&&"ifnot"in f&&(h=!b.a.g(f.ifnot)),h&&!t&&(h=!1));"foreach"in f?q=b.pc(t,h&&f.foreach||[],f,g,p):h?
|
||||
(h=p,"data"in f&&(h=p.createChildContext(f.data,{as:f.as,exportDependencies:!0})),q=b.oc(t,h,f,g)):b.h.pa(g);p=q;(f=b.a.f.get(g,k))&&"function"==typeof f.m&&f.m();b.a.f.set(g,k,!p||p.fa&&!p.fa()?void 0:p)}};b.D.Na.template=g=>{g=b.D.lc(g);return 1==g.length&&g[0].unknown||b.D.jc(g,"name")?null:"This template engine does not support anonymous templates nested within its templates"};b.h.aa.template=!0})();b.a.Cb=(a,c,d)=>{if(a.length&&c.length){var e,k,r,g,f;for(e=k=0;(!d||e<d)&&(g=a[k]);++k){for(r=
|
||||
0;f=c[r];++r)if(g.value===f.value){g.moved=f.index;f.moved=g.index;c.splice(r,1);e=r=0;break}e+=r}}};b.a.xb=(()=>{function a(c,d,e,k,r){var g=Math.min,f=Math.max,h=[],q,p=c.length,t,l=d.length,m=l-p||1,n=p+l+1,u;for(q=0;q<=p;q++){var w=u;h.push(u=[]);var v=g(l,q+m);for(t=f(0,q-1);t<=v;t++)u[t]=t?q?c[q-1]===d[t-1]?w[t-1]:g(w[t]||n,u[t-1]||n)+1:t+1:q+1}g=[];f=[];m=[];q=p;for(t=l;q||t;)l=h[q][t]-1,t&&l===h[q][t-1]?f.push(g[g.length]={status:e,value:d[--t],index:t}):q&&l===h[q-1][t]?m.push(g[g.length]=
|
||||
{status:k,value:c[--q],index:q}):(--t,--q,r.sparse||g.push({status:"retained",value:d[t]}));b.a.Cb(m,f,!r.dontLimitMoves&&10*p);return g.reverse()}return function(c,d,e){e="boolean"===typeof e?{dontLimitMoves:e}:e||{};c=c||[];d=d||[];return c.length<d.length?a(c,d,"added","deleted",e):a(d,c,"deleted","added",e)}})();(()=>{function a(e,k,r,g,f){var h=[],q=b.j(()=>{var p=k(r,f,b.a.ya(h,e))||[];if(0<h.length){var t=h.nodeType?[h]:h;if(0<t.length){var l=t[0],m=l.parentNode,n;var u=0;for(n=p.length;u<
|
||||
n;u++)m.insertBefore(p[u],l);u=0;for(n=t.length;u<n;u++)b.removeNode(t[u])}g&&b.l.M(g,null,[r,p,f])}h.length=0;h.push(...p)},{i:e,oa:()=>!!h.find(b.a.Ua)});return{J:h,Qa:q.fa()?q:void 0}}var c=b.a.f.U(),d=b.a.f.U();b.a.Mb=(e,k,r,g,f,h)=>{function q(F){x={ba:F,Ba:b.$(n++)};l.push(x)}function p(F){x=t[F];x.Ba(n++);b.a.ya(x.J,e);l.push(x)}k=k||[];"undefined"==typeof k.length&&(k=[k]);g=g||{};var t=b.a.f.get(e,c),l=[],m=0,n=0,u=[],w=[],v=[],y=0;if(t){if(!h||t&&t._countWaitingForRemove)h=Array.prototype.map.call(t,
|
||||
F=>F.ba),h=b.a.xb(h,k,{dontLimitMoves:g.dontLimitMoves,sparse:!0});for(let F=0,z,G,J;z=h[F];F++)switch(G=z.moved,J=z.index,z.status){case "deleted":for(;m<J;)p(m++);if(void 0===G){var x=t[m];x.Qa&&(x.Qa.m(),x.Qa=void 0);b.a.ya(x.J,e).length&&(g.beforeRemove&&(l.push(x),y++,x.ba===d?x=null:v[x.Ba.F()]=x),x&&u.push.apply(u,x.J))}m++;break;case "added":for(;n<J;)p(m++);void 0!==G?(w.push(l.length),p(G)):q(z.value)}for(;n<k.length;)p(m++);l._countWaitingForRemove=y}else k.forEach(q);b.a.f.set(e,c,l);
|
||||
u.forEach(g.beforeRemove?b.da:b.removeNode);var C,H;y=e.ownerDocument.activeElement;if(w.length)for(;void 0!=(k=w.shift());){x=l[k];for(C=void 0;k;)if((H=l[--k].J)&&H.length){C=H[H.length-1];break}for(m=0;u=x.J[m];C=u,m++)b.h.Eb(e,u,C)}for(k=0;x=l[k];k++){x.J||b.a.extend(x,a(e,r,x.ba,f,x.Ba));for(m=0;u=x.J[m];C=u,m++)b.h.Eb(e,u,C);!x.fc&&f&&(f(x.ba,x.J,x.Ba),x.fc=!0,C=x.J[x.J.length-1])}y&&e.ownerDocument.activeElement!=y&&y.focus();(function(F,z){if(F)for(var G=0,J=z.length;G<J;G++)z[G]&&z[G].J.forEach(M=>
|
||||
F(M,G,z[G].ba))})(g.beforeRemove,v);for(k=0;k<v.length;++k)v[k]&&(v[k].ba=d)}})();A.ko=U})(this);
|
||||
|
|
|
|||
165
vendors/knockout/src/components/defaultLoader.js
vendored
165
vendors/knockout/src/components/defaultLoader.js
vendored
|
|
@ -1,165 +0,0 @@
|
|||
(() => {
|
||||
|
||||
// The default loader is responsible for two things:
|
||||
// 1. Maintaining the default in-memory registry of component configuration objects
|
||||
// (i.e., the thing you're writing to when you call ko.components.register(someName, ...))
|
||||
// 2. Answering requests for components by fetching configuration objects
|
||||
// from that default in-memory registry and resolving them into standard
|
||||
// component definition objects (of the form { createViewModel: ..., template: ... })
|
||||
// Custom loaders may override either of these facilities, i.e.,
|
||||
// 1. To supply configuration objects from some other source (e.g., conventions)
|
||||
// 2. Or, to resolve configuration objects by loading viewmodels/templates via arbitrary logic.
|
||||
|
||||
var defaultConfigRegistry = {};
|
||||
|
||||
ko.components.register = (componentName, config) => {
|
||||
if (!config) {
|
||||
throw new Error('Invalid configuration for ' + componentName);
|
||||
}
|
||||
|
||||
if (ko.components.isRegistered(componentName)) {
|
||||
throw new Error('Component ' + componentName + ' is already registered');
|
||||
}
|
||||
|
||||
defaultConfigRegistry[componentName] = config;
|
||||
};
|
||||
|
||||
ko.components.isRegistered = componentName =>
|
||||
Object.prototype.hasOwnProperty.call(defaultConfigRegistry, componentName);
|
||||
|
||||
ko.components.unregister = componentName => {
|
||||
delete defaultConfigRegistry[componentName];
|
||||
ko.components.clearCachedDefinition(componentName);
|
||||
};
|
||||
|
||||
ko.components.defaultLoader = {
|
||||
'getConfig': (componentName, callback) => {
|
||||
var result = ko.components.isRegistered(componentName)
|
||||
? defaultConfigRegistry[componentName]
|
||||
: null;
|
||||
callback(result);
|
||||
},
|
||||
|
||||
'loadComponent': (componentName, config, callback) => {
|
||||
var errorCallback = makeErrorCallback(componentName);
|
||||
resolveConfig(componentName, errorCallback, config, callback);
|
||||
},
|
||||
|
||||
'loadTemplate': (componentName, templateConfig, callback) =>
|
||||
resolveTemplate(makeErrorCallback(componentName), templateConfig, callback)
|
||||
,
|
||||
|
||||
'loadViewModel': (componentName, viewModelConfig, callback) =>
|
||||
resolveViewModel(makeErrorCallback(componentName), viewModelConfig, callback)
|
||||
};
|
||||
|
||||
var createViewModelKey = 'createViewModel';
|
||||
|
||||
// Takes a config object of the form { template: ..., viewModel: ... }, and asynchronously convert it
|
||||
// into the standard component definition format:
|
||||
// { template: <ArrayOfDomNodes>, createViewModel: function(params, componentInfo) { ... } }.
|
||||
// Since both template and viewModel may need to be resolved asynchronously, both tasks are performed
|
||||
// in parallel, and the results joined when both are ready. We don't depend on any promises infrastructure,
|
||||
// so this is implemented manually below.
|
||||
function resolveConfig(componentName, errorCallback, config, callback) {
|
||||
var result = {},
|
||||
makeCallBackWhenZero = 2,
|
||||
tryIssueCallback = () => {
|
||||
if (--makeCallBackWhenZero === 0) {
|
||||
callback(result);
|
||||
}
|
||||
},
|
||||
templateConfig = config['template'],
|
||||
viewModelConfig = config['viewModel'];
|
||||
|
||||
if (templateConfig) {
|
||||
ko.components._getFirstResultFromLoaders('loadTemplate', [componentName, templateConfig], resolvedTemplate => {
|
||||
result['template'] = resolvedTemplate;
|
||||
tryIssueCallback();
|
||||
});
|
||||
} else {
|
||||
tryIssueCallback();
|
||||
}
|
||||
|
||||
if (viewModelConfig) {
|
||||
ko.components._getFirstResultFromLoaders('loadViewModel', [componentName, viewModelConfig], resolvedViewModel => {
|
||||
result[createViewModelKey] = resolvedViewModel;
|
||||
tryIssueCallback();
|
||||
});
|
||||
} else {
|
||||
tryIssueCallback();
|
||||
}
|
||||
}
|
||||
|
||||
function resolveTemplate(errorCallback, templateConfig, callback) {
|
||||
if (templateConfig instanceof Array) {
|
||||
// Assume already an array of DOM nodes - pass through unchanged
|
||||
callback(templateConfig);
|
||||
} else if (templateConfig instanceof DocumentFragment) {
|
||||
// Document fragment - use its child nodes
|
||||
callback([...templateConfig.childNodes]);
|
||||
} else if (templateConfig['element']) {
|
||||
var element = templateConfig['element'];
|
||||
if (element instanceof HTMLElement) {
|
||||
// Element instance - copy its child nodes
|
||||
callback(cloneNodesFromTemplateSourceElement(element));
|
||||
} else if (typeof element === 'string') {
|
||||
// Element ID - find it, then copy its child nodes
|
||||
var elemInstance = document.getElementById(element);
|
||||
if (elemInstance) {
|
||||
callback(cloneNodesFromTemplateSourceElement(elemInstance));
|
||||
} else {
|
||||
errorCallback('Cannot find element with ID ' + element);
|
||||
}
|
||||
} else {
|
||||
errorCallback('Unknown element type: ' + element);
|
||||
}
|
||||
} else {
|
||||
errorCallback('Unknown template value: ' + templateConfig);
|
||||
}
|
||||
}
|
||||
|
||||
function resolveViewModel(errorCallback, viewModelConfig, callback) {
|
||||
if (typeof viewModelConfig === 'function') {
|
||||
// Constructor - convert to standard factory function format
|
||||
// By design, this does *not* supply componentInfo to the constructor, as the intent is that
|
||||
// componentInfo contains non-viewmodel data (e.g., the component's element) that should only
|
||||
// be used in factory functions, not viewmodel constructors.
|
||||
callback(params => new viewModelConfig(params));
|
||||
} else if (typeof viewModelConfig[createViewModelKey] === 'function') {
|
||||
// Already a factory function - use it as-is
|
||||
callback(viewModelConfig[createViewModelKey]);
|
||||
} else if ('instance' in viewModelConfig) {
|
||||
// Fixed object instance - promote to createViewModel format for API consistency
|
||||
var fixedInstance = viewModelConfig['instance'];
|
||||
callback(() => fixedInstance);
|
||||
} else if ('viewModel' in viewModelConfig) {
|
||||
// Resolved AMD module whose value is of the form { viewModel: ... }
|
||||
resolveViewModel(errorCallback, viewModelConfig['viewModel'], callback);
|
||||
} else {
|
||||
errorCallback('Unknown viewModel value: ' + viewModelConfig);
|
||||
}
|
||||
}
|
||||
|
||||
function cloneNodesFromTemplateSourceElement(elemInstance) {
|
||||
if (elemInstance.matches('TEMPLATE')) {
|
||||
// For browsers with proper <template> element support (i.e., where the .content property
|
||||
// gives a document fragment), use that document fragment.
|
||||
if (elemInstance.content instanceof DocumentFragment) {
|
||||
return ko.utils.cloneNodes(elemInstance.content.childNodes);
|
||||
}
|
||||
}
|
||||
throw 'Template Source Element not a <template>';
|
||||
}
|
||||
|
||||
function makeErrorCallback(componentName) {
|
||||
return message => {
|
||||
throw new Error('Component \'' + componentName + '\': ' + message)
|
||||
};
|
||||
}
|
||||
|
||||
ko.exportSymbol('components.register', ko.components.register);
|
||||
|
||||
// By default, the default loader is the only registered component loader
|
||||
ko.components['loaders'].push(ko.components.defaultLoader);
|
||||
})();
|
||||
221
vendors/knockout/src/components/loaderRegistry.js
vendored
221
vendors/knockout/src/components/loaderRegistry.js
vendored
|
|
@ -1,138 +1,137 @@
|
|||
(() => {
|
||||
var loadingSubscribablesCache = {}, // Tracks component loads that are currently in flight
|
||||
loadedDefinitionsCache = {}; // Tracks component loads that have already completed
|
||||
var loadingSubscribablesCache = Object.create(null), // Tracks component loads that are currently in flight
|
||||
loadedDefinitionsCache = Object.create(null); // Tracks component loads that have already completed
|
||||
|
||||
ko.components = {
|
||||
get: (componentName, callback) => {
|
||||
var cachedDefinition = getObjectOwnProperty(loadedDefinitionsCache, componentName);
|
||||
var cachedDefinition = loadedDefinitionsCache[componentName];
|
||||
if (cachedDefinition) {
|
||||
// It's already loaded and cached. Reuse the same definition object.
|
||||
// Note that for API consistency, even cache hits complete asynchronously by default.
|
||||
// You can bypass this by putting synchronous:true on your component config.
|
||||
if (cachedDefinition.isSynchronousComponent) {
|
||||
ko.dependencyDetection.ignore(() => // See comment in loaderRegistryBehaviors.js for reasoning
|
||||
callback(cachedDefinition.definition)
|
||||
);
|
||||
} else {
|
||||
ko.tasks.schedule(() => callback(cachedDefinition.definition) );
|
||||
}
|
||||
ko.tasks.schedule(() => callback(cachedDefinition.definition) );
|
||||
} else {
|
||||
// Join the loading process that is already underway, or start a new one.
|
||||
loadComponentAndNotify(componentName, callback);
|
||||
var subscribable = loadingSubscribablesCache[componentName],
|
||||
completedAsync;
|
||||
if (subscribable) {
|
||||
subscribable.subscribe(callback);
|
||||
} else {
|
||||
// It's not started loading yet. Start loading, and when it's done, move it to loadedDefinitionsCache.
|
||||
subscribable = loadingSubscribablesCache[componentName] = new ko.subscribable();
|
||||
subscribable.subscribe(callback);
|
||||
|
||||
beginLoadingComponent(componentName, definition => {
|
||||
loadedDefinitionsCache[componentName] = { definition: definition };
|
||||
delete loadingSubscribablesCache[componentName];
|
||||
|
||||
// For API consistency, all loads complete asynchronously. However we want to avoid
|
||||
// adding an extra task schedule if it's unnecessary (i.e., the completion is already
|
||||
// async).
|
||||
//
|
||||
// You can bypass the 'always asynchronous' feature by putting the synchronous:true
|
||||
// flag on your component configuration when you register it.
|
||||
if (completedAsync) {
|
||||
// Note that notifySubscribers ignores any dependencies read within the callback.
|
||||
// See comment in loaderRegistryBehaviors.js for reasoning
|
||||
subscribable['notifySubscribers'](definition);
|
||||
} else {
|
||||
ko.tasks.schedule(() => subscribable['notifySubscribers'](definition));
|
||||
}
|
||||
});
|
||||
completedAsync = true;
|
||||
}
|
||||
}
|
||||
},
|
||||
|
||||
clearCachedDefinition: componentName =>
|
||||
delete loadedDefinitionsCache[componentName]
|
||||
,
|
||||
delete loadedDefinitionsCache[componentName],
|
||||
|
||||
_getFirstResultFromLoaders: getFirstResultFromLoaders
|
||||
register: (componentName, config) => {
|
||||
if (!config) {
|
||||
throw new Error('Invalid configuration for ' + componentName);
|
||||
}
|
||||
|
||||
if (defaultConfigRegistry[componentName]) {
|
||||
throw new Error('Component ' + componentName + ' is already registered');
|
||||
}
|
||||
|
||||
defaultConfigRegistry[componentName] = config;
|
||||
}
|
||||
};
|
||||
|
||||
function getObjectOwnProperty(obj, propName) {
|
||||
return Object.prototype.hasOwnProperty.call(obj, propName) ? obj[propName] : undefined;
|
||||
// The default loader is responsible for two things:
|
||||
// 1. Maintaining the default in-memory registry of component configuration objects
|
||||
// (i.e., the thing you're writing to when you call ko.components.register(someName, ...))
|
||||
// 2. Answering requests for components by fetching configuration objects
|
||||
// from that default in-memory registry and resolving them into standard
|
||||
// component definition objects (of the form { createViewModel: ..., template: ... })
|
||||
// Custom loaders may override either of these facilities, i.e.,
|
||||
// 1. To supply configuration objects from some other source (e.g., conventions)
|
||||
// 2. Or, to resolve configuration objects by loading viewmodels/templates via arbitrary logic.
|
||||
|
||||
var defaultConfigRegistry = Object.create(null);
|
||||
var createViewModelKey = 'createViewModel';
|
||||
|
||||
// Takes a config object of the form { template: ..., viewModel: ... }, and asynchronously convert it
|
||||
// into the standard component definition format:
|
||||
// { template: <ArrayOfDomNodes>, createViewModel: function(params, componentInfo) { ... } }.
|
||||
// Since both template and viewModel may need to be resolved asynchronously, both tasks are performed
|
||||
// in parallel, and the results joined when both are ready. We don't depend on any promises infrastructure,
|
||||
// so this is implemented manually below.
|
||||
function loadComponent(componentName, callback) {
|
||||
var result = {},
|
||||
config = defaultConfigRegistry[componentName] || {},
|
||||
templateConfig = config['template'],
|
||||
viewModelConfig = config['viewModel'];
|
||||
|
||||
if (templateConfig) {
|
||||
if (!templateConfig['element']) {
|
||||
throwError(componentName, 'Unknown template value: ' + templateConfig);
|
||||
}
|
||||
// Element ID - find it, then copy its child nodes
|
||||
var element = templateConfig['element'];
|
||||
var elemInstance = document.getElementById(element);
|
||||
if (!elemInstance) {
|
||||
throwError(componentName, 'Cannot find element with ID ' + element);
|
||||
}
|
||||
if (!elemInstance.matches('TEMPLATE')) {
|
||||
throwError(componentName, 'Template Source Element not a <template>');
|
||||
}
|
||||
// For browsers with proper <template> element support (i.e., where the .content property
|
||||
// gives a document fragment), use that document fragment.
|
||||
result['template'] = ko.utils.cloneNodes(elemInstance.content.childNodes);
|
||||
}
|
||||
|
||||
if (viewModelConfig) {
|
||||
if (typeof viewModelConfig[createViewModelKey] !== 'function') {
|
||||
throwError(componentName, 'Unknown viewModel value: ' + viewModelConfig);
|
||||
}
|
||||
// Already a factory function - use it as-is
|
||||
result[createViewModelKey] = viewModelConfig[createViewModelKey];
|
||||
}
|
||||
|
||||
if (result['template'] && result[createViewModelKey]) {
|
||||
callback(result);
|
||||
} else {
|
||||
callback(null);
|
||||
}
|
||||
}
|
||||
|
||||
function loadComponentAndNotify(componentName, callback) {
|
||||
var subscribable = getObjectOwnProperty(loadingSubscribablesCache, componentName),
|
||||
completedAsync;
|
||||
if (!subscribable) {
|
||||
// It's not started loading yet. Start loading, and when it's done, move it to loadedDefinitionsCache.
|
||||
subscribable = loadingSubscribablesCache[componentName] = new ko.subscribable();
|
||||
subscribable.subscribe(callback);
|
||||
|
||||
beginLoadingComponent(componentName, (definition, config) => {
|
||||
var isSynchronousComponent = !!(config && config['synchronous']);
|
||||
loadedDefinitionsCache[componentName] = { definition: definition, isSynchronousComponent: isSynchronousComponent };
|
||||
delete loadingSubscribablesCache[componentName];
|
||||
|
||||
// For API consistency, all loads complete asynchronously. However we want to avoid
|
||||
// adding an extra task schedule if it's unnecessary (i.e., the completion is already
|
||||
// async).
|
||||
//
|
||||
// You can bypass the 'always asynchronous' feature by putting the synchronous:true
|
||||
// flag on your component configuration when you register it.
|
||||
if (completedAsync || isSynchronousComponent) {
|
||||
// Note that notifySubscribers ignores any dependencies read within the callback.
|
||||
// See comment in loaderRegistryBehaviors.js for reasoning
|
||||
subscribable['notifySubscribers'](definition);
|
||||
} else {
|
||||
ko.tasks.schedule(() => subscribable['notifySubscribers'](definition));
|
||||
}
|
||||
});
|
||||
completedAsync = true;
|
||||
} else {
|
||||
subscribable.subscribe(callback);
|
||||
}
|
||||
function throwError(componentName, message) {
|
||||
throw new Error(`Component '${componentName}': ${message}`)
|
||||
}
|
||||
|
||||
function beginLoadingComponent(componentName, callback) {
|
||||
getFirstResultFromLoaders('getConfig', [componentName], config => {
|
||||
if (config) {
|
||||
// We have a config, so now load its definition
|
||||
getFirstResultFromLoaders('loadComponent', [componentName, config], definition =>
|
||||
callback(definition, config)
|
||||
);
|
||||
} else {
|
||||
// The component has no config - it's unknown to all the loaders.
|
||||
// Note that this is not an error (e.g., a module loading error) - that would abort the
|
||||
// process and this callback would not run. For this callback to run, all loaders must
|
||||
// have confirmed they don't know about this component.
|
||||
callback(null, null);
|
||||
}
|
||||
// Try the candidates
|
||||
var found = false;
|
||||
loadComponent(componentName, result => {
|
||||
// This candidate returned a value. Use it.
|
||||
(found = result != null) && callback(result);
|
||||
});
|
||||
}
|
||||
|
||||
function getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders) {
|
||||
// On the first call in the stack, start with the full set of loaders
|
||||
if (!candidateLoaders) {
|
||||
candidateLoaders = ko.components['loaders'].slice(0); // Use a copy, because we'll be mutating this array
|
||||
}
|
||||
|
||||
// Try the next candidate
|
||||
var currentCandidateLoader = candidateLoaders.shift();
|
||||
if (currentCandidateLoader) {
|
||||
var methodInstance = currentCandidateLoader[methodName];
|
||||
if (methodInstance) {
|
||||
var wasAborted = false,
|
||||
synchronousReturnValue = methodInstance.apply(currentCandidateLoader, argsExceptCallback.concat(function(result) {
|
||||
if (wasAborted) {
|
||||
callback(null);
|
||||
} else if (result !== null) {
|
||||
// This candidate returned a value. Use it.
|
||||
callback(result);
|
||||
} else {
|
||||
// Try the next candidate
|
||||
getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);
|
||||
}
|
||||
}));
|
||||
|
||||
// Currently, loaders may not return anything synchronously. This leaves open the possibility
|
||||
// that we'll extend the API to support synchronous return values in the future. It won't be
|
||||
// a breaking change, because currently no loader is allowed to return anything except undefined.
|
||||
if (synchronousReturnValue !== undefined) {
|
||||
wasAborted = true;
|
||||
|
||||
// Method to suppress exceptions will remain undocumented. This is only to keep
|
||||
// KO's specs running tidily, since we can observe the loading got aborted without
|
||||
// having exceptions cluttering up the console too.
|
||||
if (!currentCandidateLoader['suppressLoaderExceptions']) {
|
||||
throw new Error('Component loaders must supply values by invoking the callback, not by returning values synchronously.');
|
||||
}
|
||||
}
|
||||
} else {
|
||||
// This candidate doesn't have the relevant handler. Synchronously move on to the next one.
|
||||
getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);
|
||||
}
|
||||
} else {
|
||||
if (!found) {
|
||||
// No candidates returned a value
|
||||
callback(null);
|
||||
}
|
||||
}
|
||||
|
||||
// Reference the loaders via string name so it's possible for developers
|
||||
// to replace the whole array by assigning to ko.components.loaders
|
||||
ko.components['loaders'] = [];
|
||||
|
||||
ko.exportSymbol('components', ko.components);
|
||||
ko.exportSymbol('components.register', ko.components.register);
|
||||
})();
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue