Function sourceTextFingerprint

src/ui/diff/useHighlightedSource.ts:12–21

Summarize loaded source text for expansion highlighting invalidation.

(text: string)

/** Summarize loaded source text for expansion highlighting invalidation. */
function sourceTextFingerprint(text: string) {
  let hash = 2166136261;

  for (let index = 0; index < text.length; index += 1) {
    hash ^= text.charCodeAt(index);
    hash = Math.imul(hash, 16777619);
  }

  return `${text.length}:${(hash >>> 0).toString(36)}`;
}

/** Cache key for full-source highlights used by expanded unchanged rows. */
function buildSourceCacheKey(theme: AppTheme, file: DiffFile, text: string) {