Function canEncodePdfDoc

src/helpers/encoding.ts:184–213

(text: string)

 * Check if a string can be encoded in PDFDocEncoding.
 */
export function canEncodePdfDoc(text: string): boolean {
  for (const char of text) {
    // biome-ignore lint/style/noNonNullAssertion: char will exist since it's a string
    const code = char.codePointAt(0)!;

    // Check if it's in the reverse mapping (special chars)
    if (UNICODE_TO_PDF_DOC.has(code)) {
      continue;
    }

    // Tab, newline, carriage return are allowed
    if (code === TAB || code === LF || code === CR) {
      continue;
    }

    // ASCII printable range
    if (code >= 0x20 && code <= 0x7f) {
      continue;
    }

    // Latin-1 supplement (0xA1-0xFF, except 0xAD)
    if (code >= 0xa1 && code <= 0xff && code !== 0xad) {
      continue;
    }

    // Character cannot be encoded
    return false;
  }
  return true;
}

/**
 * Encode string as PDFDocEncoding.