Function maxFileCodeLineWidth

src/ui/diff/codeColumns.ts:22–43

(file: DiffFile)

/** Track the widest rendered code line for one file. */
export function maxFileCodeLineWidth(file: DiffFile) {
  const cachedWidth = maxFileCodeLineWidthCache.get(file.metadata);
  if (cachedWidth !== undefined) {
    return cachedWidth;
  }

  const deletionLines = file.metadata.deletionLines ?? [];
  const additionLines = file.metadata.additionLines ?? [];

  let maxWidth = 0;

  for (const line of deletionLines) {
    maxWidth = Math.max(maxWidth, measureRenderedCodeLineWidth(line));
  }

  for (const line of additionLines) {
    maxWidth = Math.max(maxWidth, measureRenderedCodeLineWidth(line));
  }

  maxFileCodeLineWidthCache.set(file.metadata, maxWidth);
  return maxWidth;
}

/** Find the widest line-number gutter needed for one file. */
export function findMaxLineNumber(file: DiffFile) {