Method canEncode

src/document/forms/form-font.ts:128–165

* Check if font can encode the given text. * * CID fonts with Identity-H/V encoding can encode any BMP character. * Simple fonts are limited to their encoding (typically Latin-1).

(text: string)

   * Simple fonts are limited to their encoding (typically Latin-1).
   */
  canEncode(text: string): boolean {
    if (this.isCIDFont) {
      if (!this.cidFont) {
        return false;
      }

      if (!this.cidFont.getEmbeddedProgram()) {
        return false;
      }

      for (const char of text) {
        const codePoint = char.codePointAt(0)!;

        if (codePoint > 0xffff) {
          return false;
        }

        if (this.cidFont.tryGetCharCodeForUnicode(codePoint) === null) {
          return false;
        }
      }

      return true;
    }

    if (this.simpleFont) {
      return this.simpleFont.canEncode(text);
    }

    // Standard 14 fallback: only Latin-1
    for (const char of text) {
      if (char.charCodeAt(0) > 255) {
        return false;
      }
    }

    return true;
  }

  /**
   * Encode text to character codes for this font.