| import type { ParsedHunk } from './parsed-hunk.js' | |
| /** | |
| * The hunks a unified-diff `Code` source holds, read as a surface reads | |
| * them. | |
| * | |
| * Each `@@ -a,b +c,d @@` header opens one and the lines under it are its | |
| * body; a source that opens with no header holds none. | |
| * | |
| * @param source the `Code` element's source | |
| * @returns the hunks in order | |
| */ | |
| export function hunksOf(source: string): ParsedHunk[] { | |
| const hunks: ParsedHunk[] = [] | |
| for (const line of source.split('\n')) { | |
| const header = /^@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@/.exec(line) | |
| const last = hunks.at(-1) | |
| if (header) { | |
| hunks.push({ | |
| oldStart: Number(header[1]), | |
| oldLines: Number(header[2] ?? 1), | |
| newStart: Number(header[3]), | |
| newLines: Number(header[4] ?? 1), | |
| lines: [], | |
| }) | |
| } else if (last) { | |
| hunks[hunks.length - 1] = { ...last, lines: [...last.lines, line] } | |
| } else { | |
| return [] | |
| } | |
| } | |
| return hunks | |
| } | |