Method convert

lib/object.js:78–162

(object, encryptFn = null)

class PDFObject {
  static convert(object, encryptFn = null) {
    // String literals are converted to the PDF name type
    if (typeof object === 'string') {
      return `/${object}`;

      // String objects are converted to PDF strings (UTF-16)
    } else if (object instanceof String) {
      let string = object;
      // Detect if this is a unicode string
      let isUnicode = false;
      for (let i = 0, end = string.length; i < end; i++) {
        if (string.charCodeAt(i) > 0x7f) {
          isUnicode = true;
          break;
        }
      }

      // If so, encode it as big endian UTF-16
      let stringBuffer;
      if (isUnicode) {
        stringBuffer = swapBytes(Buffer.from(`\ufeff${string}`, 'utf16le'));
      } else {
        stringBuffer = Buffer.from(string.valueOf(), 'ascii');
      }

      // Encrypt the string when necessary
      if (encryptFn) {
        string = encryptFn(stringBuffer).toString('binary');
      } else {
        string = stringBuffer.toString('binary');
      }

      // Escape characters as required by the spec
      string = string.replace(escapableRe, (c) => escapable[c]);

      return `(${string})`;

      // Buffers are converted to PDF hex strings
    } else if (Buffer.isBuffer(object)) {
      return `<${object.toString('hex')}>`;
    } else if (
      object instanceof PDFAbstractReference ||
      object instanceof PDFTree ||
      object instanceof SpotColor
    ) {
      return object.toString();
    } else if (object instanceof Date) {
      let string =
        `D:${pad(object.getUTCFullYear(), 4)}` +
        pad(object.getUTCMonth() + 1, 2) +
        pad(object.getUTCDate(), 2) +
        pad(object.getUTCHours(), 2) +
        pad(object.getUTCMinutes(), 2) +
        pad(object.getUTCSeconds(), 2) +
        'Z';

      // Encrypt the string when necessary
      if (encryptFn) {