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TypeScript
at main
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253// Turns a source file into ordered code/prose segments for the rendered view:// runs of comment lines become `prose` (rendered as markdown boxes), everything// else stays `code`. This sits on top of the classifier in highlight.ts — the// engine-agnostic seam where tree-sitter can replace Shiki later.
import { classifyCommentLines } from './highlight';
export interface Segment { kind: 'code' | 'prose'; text: string; // 1-based, file-absolute line of this segment's first line — lets the renderer // number a code block by its real position after earlier comment runs. startLine: number;}
export async function extractSegments( code: string, lang: string | undefined,): Promise<Segment[]> { const lines = code.split('\n'); const isComment = await classifyCommentLines(code, lang); const segments: Segment[] = []; let i = 0; while (i < lines.length) { const comment = isComment[i] === true; let j = i; while (j < lines.length && (isComment[j] === true) === comment) j++; const text = lines.slice(i, j).join('\n'); // Drop all-whitespace code runs so a blank line between two comment blocks // doesn't render as an empty code block (it just separates the two boxes). if (comment) segments.push({ kind: 'prose', text, startLine: i + 1 }); else if (text.trim() !== '') segments.push({ kind: 'code', text, startLine: i + 1 }); i = j; } return segments;}
// Strip a single leading comment marker (and block-comment fences) per line,// leaving prose for markdown. Only one marker is removed, so markdown that itself// uses `#` (headings) inside a `#`-commented language survives.export function stripMarkers(text: string): string { return text .split('\n') .map((line) => { let s = line.trim(); if (s.startsWith('/*')) s = s.slice(2).trimStart(); if (s.endsWith('*/')) s = s.slice(0, -2).trimEnd(); return s.replace(/^(\/\/\/|\/\/!|\/\/|#|--|;|%|\*)\s?/, ''); }) .join('\n') .trim();}