Function _getWidgetRect

apps/OpenSign/src/constant/Utils.js:3800–3837

(widget, pdfDoc)

}

function _getWidgetRect(widget, pdfDoc) {
  try {
    const r = widget.getRectangle?.();
    if (
      r &&
      isFinite(r.x) &&
      isFinite(r.y) &&
      isFinite(r.width) &&
      isFinite(r.height)
    ) {
      return r;
    }
  } catch {
    /* fall through to manual extraction */
  }

  try {
    const rectArr = widget.dict?.lookup?.(PDFName.of("Rect"));
    if (!rectArr || typeof rectArr.size !== "function" || rectArr.size() !== 4)
      return null;

    const x1 = _numberFromPdfObject(rectArr.get(0));
    const y1 = _numberFromPdfObject(rectArr.get(1));
    const x2 = _numberFromPdfObject(rectArr.get(2));
    const y2 = _numberFromPdfObject(rectArr.get(3));

    if ([x1, y1, x2, y2].some((v) => !isFinite(v))) return null;

    return {
      x: Math.min(x1, x2),
      y: Math.min(y1, y2),
      width: Math.abs(x2 - x1),
      height: Math.abs(y2 - y1)
    };
  } catch {
    return null;
  }
}

function _numberFromPdfObject(obj) {
  if (!obj) return NaN;