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August 29, 2025 02:13
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| import _ from 'lodash'; | |
| import { clientContext } from '../../context/client'; | |
| import { translateTextsClient } from './translate-texts.client'; | |
| import { isLocal } from '../../context'; | |
| const rxEmail = /^(([^<>()\[\]\.,;:\s@\"]+(\.[^<>()\[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()\.,;\s@\"]+\.{0,1})+([^<>()\.,;:\s@\"]{2,}|[\d\.]+))$/i; | |
| interface IItem { | |
| node: Node; | |
| key: string; | |
| orig: string; | |
| hash: string; | |
| knowns: WeakMap<Node, string>; | |
| } | |
| function getAncestors(node: Node):Node[] { | |
| if (!node) return []; | |
| const ancestors = []; | |
| while (node) { | |
| ancestors.push(node); | |
| node = node.parentElement; | |
| } | |
| return ancestors; | |
| } | |
| export class TranslationWidget { | |
| knownTitles = new WeakMap<Node, string>(); | |
| knownPlaceholders = new WeakMap<Node, string>(); | |
| knownContent = new WeakMap<Node, string>(); | |
| items:IItem[] = []; | |
| checkSoon: () => Promise<void>; | |
| langCode: string; | |
| constructor() { | |
| this.langCode = clientContext.user?.langCode; | |
| if (!this.langCode || ['en', 'en-us'].includes(this.langCode.toLowerCase())) return; | |
| this.checkSoon = _.throttle( | |
| () => this.check(), | |
| 200, | |
| { leading: true, trailing: true }, | |
| ); | |
| this.scan(document); | |
| this.checkSoon().then(); | |
| const observer = new MutationObserver(this.onMutate.bind(this)); | |
| observer.observe(document, { | |
| characterData: true, | |
| subtree: true, | |
| childList: true, | |
| attributes: true, | |
| attributeFilter: ['placeholder', 'title'], | |
| }); | |
| } | |
| async check ():Promise<void> { | |
| if (!this.items.length) return; | |
| const items = this.items; | |
| this.items = []; | |
| await this.translateItems(items); | |
| } | |
| async translateItems(items:IItem[]):Promise<void> { | |
| const cleanItems = items.map(item => { | |
| const prefix = item.orig.match(/^\s*/)?.[0] || ''; | |
| const suffix = item.orig.match(/\s*$/)?.[0] || ''; | |
| const main = item.orig.substring(prefix.length, item.orig.length - suffix.length); | |
| return { ...item, prefix, suffix, main }; | |
| }); | |
| const translations = await translateTextsClient({ | |
| langCode: this.langCode, | |
| texts: cleanItems.map(i => i.main), | |
| }); | |
| for (const [i, translation] of translations.entries()) { | |
| const item = cleanItems[i]; | |
| const fullTranslation = [item.prefix, translation, item.suffix].filter(x => x).join(''); | |
| const newHash = fasthash(fullTranslation); | |
| item.knowns.set(item.node, newHash); | |
| item.node[item.key] = fullTranslation; | |
| } | |
| } | |
| onMutate (mutations: MutationRecord[]):void { | |
| for (const mutation of mutations) { | |
| if (mutation.target) this.scan(mutation.target); | |
| for (const node of mutation.addedNodes || []) { | |
| const ancestors = getAncestors(node); | |
| const ignore = !!ancestors.find(n => n.nodeName === 'HEAD' || (n instanceof Element && n.classList.contains('notranslate'))); | |
| if (ignore) continue; | |
| this.scan(node); | |
| } | |
| } | |
| this.checkSoon().then(); | |
| } | |
| private checkItem ({ knowns, node, key }: { knowns: WeakMap<Node, string>, node:Node, key: string }) { | |
| const orig = node[key] as string; | |
| if (!orig || typeof orig !== 'string' || !/[a-z]/i.test(orig)) return; | |
| if (rxEmail.test(orig)) return; | |
| const knownHash = knowns.get(node); | |
| const hash = fasthash(orig); | |
| if (hash === knownHash) return; | |
| this.items.push({ knowns, node, key, orig, hash }); | |
| } | |
| scan (node:Node):void { | |
| if (!node) return; | |
| if (['SCRIPT', 'STYLE', 'HEAD', 'LINK', 'TEMPLATE'].includes(node.nodeName)) { | |
| return; | |
| } | |
| if (node instanceof Element) { | |
| if (node.classList.contains('notranslate')) { | |
| return; | |
| } | |
| if (node.getAttribute('placeholder')) { | |
| this.checkItem({ knowns: this.knownPlaceholders, node, key: 'placeholder' }); | |
| } | |
| if (node.getAttribute('title')) { | |
| this.checkItem({ knowns: this.knownTitles, node, key: 'title' }); | |
| } | |
| } | |
| if (node.nodeType === Node.TEXT_NODE) { | |
| this.checkItem({ knowns: this.knownContent, node, key: 'textContent' }); | |
| } | |
| for (const child of node.childNodes) { | |
| this.scan(child); | |
| } | |
| } | |
| } | |
| function fasthash(s:string):string { | |
| return [...s].reduce((hash, c) => (Math.imul(31, hash) + c.charCodeAt(0)) | 0, 0 ).toString(); | |
| } |
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