@fe6/water-pro/es/modal-pro/src/hooks/use-modal-drag.js

An enterprise-class UI design language and Vue-based implementation

/** @format */
import { unref, watchEffect } from 'vue';
import { useTimeoutFn } from '../../../_util/hooks/use-timeout';
export function useModalDragMove(context) {
  var getStyle = function getStyle(dom, attr) {
    return getComputedStyle(dom)[attr];
  };

  var drag = function drag(wrap) {
    if (!wrap) {
      return;
    }

    wrap.setAttribute('data-drag', unref(context.draggable));
    var dialogHeaderEl = wrap.querySelector('.ant-modal-header');
    var dragDom = wrap.querySelector('.ant-modal');

    if (!dialogHeaderEl || !dragDom || !unref(context.draggable)) {
      return;
    }

    dialogHeaderEl.style.cursor = 'move';

    dialogHeaderEl.onmousedown = function (e) {
      if (!e) {
        return;
      } // 鼠标按下，计算当前元素距离可视区的距离


      var disX = e.clientX;
      var disY = e.clientY;
      var screenWidth = document.body.clientWidth; // body当前宽度

      var screenHeight = document.documentElement.clientHeight; // 可见区域高度(应为body高度，可某些环境下无法获取)

      var dragDomWidth = dragDom.offsetWidth; // 对话框宽度

      var dragDomheight = dragDom.offsetHeight; // 对话框高度

      var minDragDomLeft = dragDom.offsetLeft;
      var maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth;
      var minDragDomTop = dragDom.offsetTop;
      var maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomheight; // 获取到的值带px 正则匹配替换

      var domLeft = getStyle(dragDom, 'left');
      var domTop = getStyle(dragDom, 'top');
      var styL = +domLeft;
      var styT = +domTop; // 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px

      if (domLeft.includes('%')) {
        styL = +document.body.clientWidth * (+domLeft.replace(/%/g, '') / 100);
        styT = +document.body.clientHeight * (+domTop.replace(/%/g, '') / 100);
      } else {
        styL = +domLeft.replace(/px/g, '');
        styT = +domTop.replace(/px/g, '');
      }

      document.onmousemove = function (e) {
        // 通过事件委托，计算移动的距离
        var left = e.clientX - disX;
        var top = e.clientY - disY; // 边界处理

        if (-left > minDragDomLeft) {
          left = -minDragDomLeft;
        } else if (left > maxDragDomLeft) {
          left = maxDragDomLeft;
        }

        if (-top > minDragDomTop) {
          top = -minDragDomTop;
        } else if (top > maxDragDomTop) {
          top = maxDragDomTop;
        } // 移动当前元素


        dragDom.style.cssText += ";left:".concat(left + styL, "px;top:").concat(top + styT, "px;");
      };

      document.onmouseup = function () {
        document.onmousemove = null;
        document.onmouseup = null;
      };
    };
  };

  var handleDrag = function handleDrag() {
    var dragWraps = document.querySelectorAll('.ant-modal-wrap');

    for (var _i = 0, _Array$from = Array.from(dragWraps); _i < _Array$from.length; _i++) {
      var wrap = _Array$from[_i];

      if (!wrap) {
        continue;
      }

      var display = getStyle(wrap, 'display');
      var draggable = wrap.getAttribute('data-drag');

      if (display !== 'none') {
        // 拖拽位置
        if (draggable === null || unref(context.destroyOnClose)) {
          drag(wrap);
        }
      }
    }
  };

  watchEffect(function () {
    if (!unref(context.visible) || !unref(context.draggable)) {
      return;
    }

    useTimeoutFn(function () {
      handleDrag();
    }, 30);
  });
}