Function normalizeSequenceToken

packages/app-core/src/lib/keymaps.ts:1262–1291

(input: string)

}

export function normalizeSequenceToken(input: string): string | null {
  const parts = input
    .split("+")
    .map((part) => part.trim())
    .filter(Boolean);
  if (parts.length === 0) return null;
  const rawKey = parts.pop();
  if (!rawKey) return null;
  let base = normalizeSequenceBaseToken(rawKey);
  if (!base) return null;
  const modifiers = normalizeModifiers(
    parts
      .map((part) => normalizeModifierToken(part))
      .filter((part): part is NonNullable<typeof part> => !!part)
      .filter((part) => part !== "Mod"),
  );
  // When a non-Shift modifier (Ctrl/Alt/Meta) is combined with a single
  // ASCII letter, canonicalize to uppercase. Event-produced tokens come
  // out lowercase (e.g. Ctrl+w → `'w'` since Shift isn't held), but the
  // convention in default bindings and user-written keymaps is uppercase
  // (`'Ctrl+W'`). Matching them requires a consistent canonical form.
  if (
    base.length === 1 &&
    /[a-zA-Z]/.test(base) &&
    modifiers.some((m) => m === "Ctrl" || m === "Alt" || m === "Meta")
  ) {
    base = base.toUpperCase();
  }
  return modifiers.length > 0 ? `${modifiers.join("+")}+${base}` : base;
}

export function normalizeSequenceBinding(input: string): string | null {
  const tokens = input