@opensig/opendesign/es/virtual-list/utils/alignment.mjs

function createAxisSelector(isHorizontal) {
  const h = () => isHorizontal.value;
  return {
    getScroll: (el) => h() ? el.scrollLeft : el.scrollTop,
    setScroll: (el, val) => {
      if (h()) {
        el.scrollLeft = val;
      } else {
        el.scrollTop = val;
      }
    },
    getAxisSize: (el) => h() ? el.offsetWidth : el.offsetHeight,
    getScrollSize: (el) => h() ? el.scrollWidth : el.scrollHeight,
    getClientSize: (el) => h() ? el.clientWidth : el.clientHeight,
    scrollToPos: (el, pos, behavior) => {
      el.scrollTo({
        [h() ? "left" : "top"]: pos,
        behavior
      });
    }
  };
}
function calculateScrollTarget(itemTop, align, sizes) {
  const { containerSize, itemSize } = sizes;
  if (align === "start") {
    return itemTop;
  }
  if (align === "center") {
    return itemTop - containerSize / 2 + itemSize / 2;
  }
  if (align === "end") {
    return itemTop - containerSize + itemSize;
  }
  if (typeof align === "number") {
    return itemTop - align;
  }
  return itemTop;
}
function resolveNearestAlign(viewport) {
  const { currentScroll, itemTop, itemSize, containerSize } = viewport;
  if (currentScroll > itemTop) {
    return "start";
  }
  if (currentScroll + containerSize < itemTop + itemSize) {
    return "end";
  }
  return null;
}
export {
  calculateScrollTarget,
  createAxisSelector,
  resolveNearestAlign
};