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a tool for shared writing and social publishing
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1.5 kB · 43 lines
TypeScript
at perf/paste
1234567891011121314151617181920212223242526272829303132333435363738394041424344import { Doc, applyUpdate, XmlElement, XmlText } from "yjs";import * as base64 from "base64-js";import { Delta, YJSFragmentToString } from "src/utils/yjsFragmentToString";
function decodeYDoc(value: string): Doc { let doc = new Doc(); applyUpdate(doc, base64.toByteArray(value)); return doc;}
// Plain text of an encoded YJS doc (e.g. a comment's content), for excerptsexport function getCommentPlaintext(value: string | undefined): string { if (!value) return ""; return decodeYDoc(value) .getXmlElement("prosemirror") .toArray() .map((n) => YJSFragmentToString(n)) .join("\n");}
// Extracts the text covered by a comment's mark from a block's encoded YJS// doc, for showing the quoted range alongside the comment.export function getCommentQuoteText( value: string | undefined, commentID: string,): string { if (!value) return ""; let doc = decodeYDoc(value); let parts: string[] = []; let walk = (node: XmlElement | XmlText | unknown) => { if (node instanceof XmlText) { for (let d of node.toDelta() as Delta[]) { // Anchor marks hold a space-separated ID list where comments overlap let ids = (d.attributes?.comment?.commentID || "").split(" "); if (ids.includes(commentID)) parts.push(d.insert); } } else if (node instanceof XmlElement) { for (let child of node.toArray()) walk(child); } }; for (let n of doc.getXmlElement("prosemirror").toArray()) walk(n); return parts.join("");}