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Mirror of https://github.com/improsocial/improAn extensible Bluesky client for web
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JavaScript
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111import { sliceByByte, sortBy, getByteLength } from "/js/utils.js";import { clampFacetIndex } from "/js/facetHelpers.js";
function facetOverlaps(facet1, facet2) { return ( facet1.index.byteStart < facet2.index.byteEnd && facet1.index.byteEnd > facet2.index.byteStart );}
// Produces the flat token stream ({ type: "text" } / { type: "facet" }) that// feeds the plugin rich-text pipeline.export function tokenizeRichText({ text, facets = [] }) { const textByteLength = getByteLength(text); const clampedFacets = facets.map((facet) => clampFacetIndex(facet, { byteStart: 0, byteEnd: textByteLength, }), ); const sortedFacets = sortBy(clampedFacets, (facet) => facet.index.byteStart); const distinctFacets = []; for (const facet of sortedFacets) { if (!distinctFacets.some((f) => facetOverlaps(f, facet))) { distinctFacets.push(facet); } } const tokens = []; let currentIndex = 0; for (const facet of distinctFacets) { const beforeText = sliceByByte(text, currentIndex, facet.index.byteStart); if (beforeText) { tokens.push({ type: "text", value: beforeText }); } tokens.push({ type: "facet", facet, text: sliceByByte(text, facet.index.byteStart, facet.index.byteEnd), }); currentIndex = facet.index.byteEnd; } const remainingText = sliceByByte(text, currentIndex); if (remainingText) { tokens.push({ type: "text", value: remainingText }); } return tokens;}
export function tokensHaveFacetType(tokens, facetTypes) { if (!facetTypes || facetTypes.size === 0) return false; for (const token of tokens) { if (token.type !== "facet") continue; const features = token.facet.features; if (!features) continue; for (const feature of features) { if (facetTypes.has(feature.$type)) return true; } } return false;}
export function validateRichTextTokens(tokens) { if (!Array.isArray(tokens)) return false; return tokens.every((token) => { if (!token || typeof token !== "object") return false; switch (token.type) { case "text": return typeof token.value === "string"; case "facet": return !!token.facet?.index; case "inline": case "block": { const node = token.node; return ( !!node && typeof node === "object" && typeof node.tag === "string" ); } default: return false; } });}
// Replaces facet tokens with the originals from the input stream they were// derived from, matched by byte rangeexport function hydrateRichTextFacets(tokens, baseTokens) { const facetTokensByRange = new Map(); for (const token of baseTokens) { if (token.type === "facet") { const { byteStart, byteEnd } = token.facet.index; facetTokensByRange.set(`${byteStart}-${byteEnd}`, token); } } const hydrated = []; for (const token of tokens) { if (token.type !== "facet") { hydrated.push(token); continue; } const { byteStart, byteEnd } = token.facet.index; const original = facetTokensByRange.get(`${byteStart}-${byteEnd}`); if (!original) { throw new Error( `facet ${byteStart}-${byteEnd} does not match any input facet`, ); } hydrated.push(original); } return hydrated;}