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pulls/pr_01m47d24b0e6n91zwymwxg0vpx

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pr_01m47d24b0e6n91zwymwxg0vpx/apps/web/app/lib/highlight.server.ts

31 lines1,018 bytesCodeBlame
1import { THEME, getHighlighter, languageOf, linesToHtml } from "./shiki";
2
3const MAX_HIGHLIGHT_CHARS = 200_000;
4
5/**
6 * Highlighted HTML for a file, or null when its language is unknown or it
7 * is too large, in which case the caller shows plain text.
8 */
9export async function highlight(path: string, text: string): Promise<string | null> {
10 const lang = languageOf(path);
11 if (!lang || text.length > MAX_HIGHLIGHT_CHARS) return null;
12 try {
13 return (await getHighlighter()).codeToHtml(text.replace(/\n$/, ""), { lang, theme: THEME });
14 } catch {
15 return null;
16 }
17}
18
19/**
20 * A file's lines as highlighted HTML, one string per line, or null when its
21 * language is unknown or it is too large.
22 */
23export async function highlightLines(path: string, text: string): Promise<string[] | null> {
24 const lang = languageOf(path);
25 if (!lang || text.length > MAX_HIGHLIGHT_CHARS) return null;
26 try {
27 return linesToHtml(await getHighlighter(), text.replace(/\n$/, ""), lang);
28 } catch {
29 return null;
30 }
31}