4dkankan-components/packages/utils/dom/position.ts

import { isClient } from '@vueuse/core';

export const isInContainer = (el?: Element, container?: Element | Window): boolean => {
  if (!isClient || !el || !container) return false;

  const elRect = el.getBoundingClientRect();

  let containerRect: Pick<DOMRect, 'top' | 'bottom' | 'left' | 'right'>;
  if (container instanceof Element) {
    containerRect = container.getBoundingClientRect();
  } else {
    containerRect = {
      top: 0,
      right: window.innerWidth,
      bottom: window.innerHeight,
      left: 0,
    };
  }
  return (
    elRect.top < containerRect.bottom &&
    elRect.bottom > containerRect.top &&
    elRect.right > containerRect.left &&
    elRect.left < containerRect.right
  );
};

export const getOffsetTop = (el: HTMLElement) => {
  let offset = 0;
  let parent = el;

  while (parent) {
    offset += parent.offsetTop;
    parent = parent.offsetParent as HTMLElement;
  }

  return offset;
};

export const getOffsetTopDistance = (el: HTMLElement, containerEl: HTMLElement) => {
  return Math.abs(getOffsetTop(el) - getOffsetTop(containerEl));
};

export const getClientXY = (event: MouseEvent | TouchEvent) => {
  let clientX: number;
  let clientY: number;
  if (event.type === 'touchend') {
    clientY = (event as TouchEvent).changedTouches[0].clientY;
    clientX = (event as TouchEvent).changedTouches[0].clientX;
  } else if (event.type.startsWith('touch')) {
    clientY = (event as TouchEvent).touches[0].clientY;
    clientX = (event as TouchEvent).touches[0].clientX;
  } else {
    clientY = (event as MouseEvent).clientY;
    clientX = (event as MouseEvent).clientX;
  }
  return {
    clientX,
    clientY,
  };
};