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master @ 19 LINES
 
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// Shared math for the framed code block: label seat and width checks.
import { checkGrid, len } from "../../lib/ascii";

export interface Props {
  code: string;
  /** Frame label: a language tag or a file path. */
  label: string;
  /** Apply diff line colors. */
  diff?: boolean;
}

/** Label truncated so the top border always seats " LABEL " plus the
 *  copy button at the narrow frame. */
export function frameLabel(label: string, width: number): string {
  const max = width - 16;
  const cut = len(label) > max ? "..." + [...label].slice(-(max - 3)).join("") : l
abel;
  return checkGrid(cut, max, "code frame label");
}

// Shared math for the framed code block: la
bel seat and width checks.
import { checkGrid, len } from "../../lib/as
cii";

export interface Props {
  code: string;
  /** Frame label: a language tag or a file 
path. */
  label: string;
  /** Apply diff line colors. */
  diff?: boolean;
}

/** Label truncated so the top border always
 seats " LABEL " plus the
 *  copy button at the narrow frame. */
export function frameLabel(label: string, wi
dth: number): string {
  const max = width - 16;
  const cut = len(label) > max ? "..." + [..
.label].slice(-(max - 3)).join("") : label;
  return checkGrid(cut, max, "code frame lab
el");
}
 
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