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custom-element-registry.ts
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custom-element-registry.ts
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import { MockHTMLElement, MockNode } from './node';
import { NODE_TYPES } from './constants';
export class MockCustomElementRegistry implements CustomElementRegistry {
private __registry: Map<string, { cstr: any; options: any }>;
private __whenDefined: Map<string, Function[]>;
constructor(private win: Window) {}
define(tagName: string, cstr: any, options?: any) {
if (tagName.toLowerCase() !== tagName) {
throw new Error(
`Failed to execute 'define' on 'CustomElementRegistry': "${tagName}" is not a valid custom element name`
);
}
if (this.__registry == null) {
this.__registry = new Map();
}
this.__registry.set(tagName, { cstr, options });
if (this.__whenDefined != null) {
const whenDefinedResolveFns = this.__whenDefined.get(tagName);
if (whenDefinedResolveFns != null) {
whenDefinedResolveFns.forEach((whenDefinedResolveFn) => {
whenDefinedResolveFn();
});
whenDefinedResolveFns.length = 0;
this.__whenDefined.delete(tagName);
}
}
const doc = this.win.document;
if (doc != null) {
const hosts = doc.querySelectorAll(tagName);
hosts.forEach((host) => {
if (upgradedElements.has(host) === false) {
tempDisableCallbacks.add(doc);
const upgradedCmp = createCustomElement(this, doc, tagName) as MockNode;
for (let i = 0; i < host.childNodes.length; i++) {
const childNode = host.childNodes[i];
childNode.remove();
upgradedCmp.appendChild(childNode as any);
}
tempDisableCallbacks.delete(doc);
if (proxyElements.has(host)) {
proxyElements.set(host, upgradedCmp);
}
}
fireConnectedCallback(host);
});
}
}
get(tagName: string) {
if (this.__registry != null) {
const def = this.__registry.get(tagName.toLowerCase());
if (def != null) {
return def.cstr;
}
}
return undefined;
}
upgrade(_rootNode: any) {
//
}
clear() {
if (this.__registry != null) {
this.__registry.clear();
}
if (this.__whenDefined != null) {
this.__whenDefined.clear();
}
}
whenDefined(tagName: string): Promise<CustomElementConstructor> {
tagName = tagName.toLowerCase();
if (this.__registry != null && this.__registry.has(tagName) === true) {
return Promise.resolve<CustomElementConstructor>(this.__registry.get(tagName).cstr);
}
return new Promise<CustomElementConstructor>((resolve) => {
if (this.__whenDefined == null) {
this.__whenDefined = new Map();
}
let whenDefinedResolveFns = this.__whenDefined.get(tagName);
if (whenDefinedResolveFns == null) {
whenDefinedResolveFns = [];
this.__whenDefined.set(tagName, whenDefinedResolveFns);
}
whenDefinedResolveFns.push(resolve);
});
}
}
export function createCustomElement(customElements: MockCustomElementRegistry, ownerDocument: any, tagName: string) {
const Cstr = customElements.get(tagName);
if (Cstr != null) {
const cmp = new Cstr(ownerDocument);
cmp.nodeName = tagName.toUpperCase();
upgradedElements.add(cmp);
return cmp;
}
const host = new Proxy(
{},
{
get(obj: any, prop: string) {
const elm = proxyElements.get(host);
if (elm != null) {
return elm[prop];
}
return obj[prop];
},
set(obj: any, prop: string, val: any) {
const elm = proxyElements.get(host);
if (elm != null) {
elm[prop] = val;
} else {
obj[prop] = val;
}
return true;
},
has(obj: any, prop: string) {
const elm = proxyElements.get(host);
if (prop in elm) {
return true;
}
if (prop in obj) {
return true;
}
return false;
},
}
);
const elm = new MockHTMLElement(ownerDocument, tagName);
proxyElements.set(host, elm);
return host;
}
const proxyElements = new WeakMap();
const upgradedElements = new WeakSet();
export function connectNode(ownerDocument: any, node: MockNode) {
node.ownerDocument = ownerDocument;
if (node.nodeType === NODE_TYPES.ELEMENT_NODE) {
if (ownerDocument != null && node.nodeName.includes('-')) {
const win = ownerDocument.defaultView as Window;
if (win != null && typeof (node as any).connectedCallback === 'function' && node.isConnected) {
fireConnectedCallback(node);
}
const shadowRoot = (node as any as Element).shadowRoot;
if (shadowRoot != null) {
shadowRoot.childNodes.forEach((childNode) => {
connectNode(ownerDocument, childNode as any);
});
}
}
node.childNodes.forEach((childNode) => {
connectNode(ownerDocument, childNode);
});
} else {
node.childNodes.forEach((childNode) => {
childNode.ownerDocument = ownerDocument;
});
}
}
function fireConnectedCallback(node: any) {
if (typeof (node as any).connectedCallback === 'function') {
if (tempDisableCallbacks.has(node.ownerDocument) === false) {
try {
node.connectedCallback();
} catch (e) {
console.error(e);
}
}
}
}
export function disconnectNode(node: MockNode) {
if (node.nodeType === NODE_TYPES.ELEMENT_NODE) {
if (node.nodeName.includes('-') === true && typeof (node as any).disconnectedCallback === 'function') {
if (tempDisableCallbacks.has(node.ownerDocument) === false) {
try {
(node as any).disconnectedCallback();
} catch (e) {
console.error(e);
}
}
}
node.childNodes.forEach(disconnectNode);
}
}
export function attributeChanged(node: MockNode, attrName: string, oldValue: string, newValue: string) {
attrName = attrName.toLowerCase();
const observedAttributes = (node as any).constructor.observedAttributes as string[];
if (
Array.isArray(observedAttributes) === true &&
observedAttributes.some((obs) => obs.toLowerCase() === attrName) === true
) {
try {
(node as any).attributeChangedCallback(attrName, oldValue, newValue);
} catch (e) {
console.error(e);
}
}
}
export function checkAttributeChanged(node: MockNode) {
return node.nodeName.includes('-') === true && typeof (node as any).attributeChangedCallback === 'function';
}
const tempDisableCallbacks = new Set();