Method setAppearance

src/annotations/base.ts:398–414

* Set an appearance stream by type.

(type: "N" | "R" | "D", stream: PdfStream)

   * Set an appearance stream by type.
   */
  private setAppearance(type: "N" | "R" | "D", stream: PdfStream): void {
    let ap = this.dict.getDict("AP", this.registry.resolve.bind(this.registry));

    if (ap instanceof PdfDict) {
      // Register the stream and store the reference
      const streamRef = this.registry.register(stream);

      ap.set(type, streamRef);

      this.markModified();

      return;
    }

    ap = new PdfDict();
    this.dict.set("AP", ap);
  }

  // ─────────────────────────────────────────────────────────────────────────────
  // Change Tracking