Method getKeywords

src/api/pdf.ts:1171–1195

* Get the document keywords. * * @returns Array of keywords, or undefined if not set

()

   * @returns Array of keywords, or undefined if not set
   */
  getKeywords(): string[] | undefined {
    const infoRef = this.ctx.info.trailer.getRef("Info");

    if (!infoRef) {
      return undefined;
    }

    const info = this.ctx.registry.getObject(infoRef);

    if (!(info instanceof PdfDict)) {
      return undefined;
    }

    const keywordsStr = info.getString("Keywords");

    if (!keywordsStr) {
      return undefined;
    }

    const keywords = keywordsStr.asString();

    // Split on whitespace, filter empty strings
    // Returns empty array for empty string (which is valid - explicitly set to no keywords)
    return keywords.split(/\s+/).filter(k => k.length > 0);
  }

  /**
   * Set the document keywords.