Function parseKeySequence

packages/core/src/keybindings/parser.ts:208–251

(input: string)

 * ```
 */
export function parseKeySequence(input: string): ParseKeyResult {
  const trimmed = input.trim();

  if (trimmed.length === 0) {
    return {
      ok: false,
      error: { code: "EMPTY_SEQUENCE", detail: "keybinding string is empty" },
    };
  }

  // Split on whitespace for chord sequences
  const parts = trimmed.split(/\s+/);
  const keys: ParsedKey[] = [];

  for (const part of parts) {
    const result = parseKeyPart(part);
    if (!result.ok) {
      return result;
    }
    keys.push(result.value);
  }

  if (keys.length === 0) {
    return {
      ok: false,
      error: { code: "EMPTY_SEQUENCE", detail: "no keys in sequence" },
    };
  }

  if (keys.length > MAX_CHORD_LENGTH) {
    return {
      ok: false,
      error: {
        code: "INVALID_KEY",
        detail: `chord sequence length ${String(keys.length)} exceeds maximum of ${String(MAX_CHORD_LENGTH)}`,
      },
    };
  }

  return {
    ok: true,
    value: Object.freeze({ keys: Object.freeze(keys) }),
  };
}

/**
 * Check if two ParsedKey objects are equal.