react-pdf-highlighter/dist/src/lib/get-bounding-rect.js

Set of React components for PDF annotation

const getBoundingRect = (clientRects) => {
  const rects = Array.from(clientRects).map((rect) => {
    const { left, top, width, height, pageNumber: pageNumber2 } = rect;
    const X02 = left;
    const X12 = left + width;
    const Y02 = top;
    const Y12 = top + height;
    return { X0: X02, X1: X12, Y0: Y02, Y1: Y12, pageNumber: pageNumber2 };
  });
  let firstPageNumber = Number.MAX_SAFE_INTEGER;
  for (const rect of rects) {
    firstPageNumber = Math.min(
      firstPageNumber,
      rect.pageNumber ?? firstPageNumber
    );
  }
  const rectsWithSizeOnFirstPage = rects.filter(
    (rect) => (rect.X0 > 0 || rect.X1 > 0 || rect.Y0 > 0 || rect.Y1 > 0) && rect.pageNumber === firstPageNumber
  );
  const optimal = rectsWithSizeOnFirstPage.reduce((res, rect) => {
    return {
      X0: Math.min(res.X0, rect.X0),
      X1: Math.max(res.X1, rect.X1),
      Y0: Math.min(res.Y0, rect.Y0),
      Y1: Math.max(res.Y1, rect.Y1),
      pageNumber: firstPageNumber
    };
  }, rectsWithSizeOnFirstPage[0]);
  const { X0, X1, Y0, Y1, pageNumber } = optimal;
  return {
    left: X0,
    top: Y0,
    width: X1 - X0,
    height: Y1 - Y0,
    pageNumber
  };
};
export {
  getBoundingRect
};