@ecip/ecip-web/src/directive/el-drag-dialog/drag.js

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export default {
  bind(el, binding, vnode, oldVnode) {
    const dialogHeaderEl = el.querySelector('.el-dialog__header')
    const dragDom = el.querySelector('.el-dialog')
    dialogHeaderEl.style.cursor = 'move'

    let isFullScreen = false // 初始非全屏
    let nowWidth = 0 // 当前宽

    let nowHight = 0 // 当前高

    // 当前顶部高度

    let nowMarginTop = 0

    // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
    const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null)

    dialogHeaderEl.onmousedown = (e) => {
      // 鼠标按下，计算当前元素距离可视区的距离
      const disX = e.clientX - dialogHeaderEl.offsetLeft
      const disY = e.clientY - dialogHeaderEl.offsetTop

      // 获取到的值带px 正则匹配替换
      let styL, styT

      // 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 (sty.left.includes('%')) {
        styL = +document.body.clientWidth * (+sty.left.replace(/\%/g, '') / 100)
        styT = +document.body.clientHeight * (+sty.top.replace(/\%/g, '') / 100)
      } else {
        styL = +sty.left.replace(/\px/g, '')
        styT = +sty.top.replace(/\px/g, '')
      }

      document.onmousemove = function(e) {
        // 通过事件委托，计算移动的距离
        const l = e.clientX - disX
        const t = e.clientY - disY

        // 移动当前元素
        dragDom.style.left = `${l + styL}px`
        dragDom.style.top = `${t + styT}px`

        // 将此时的位置传出去
        // binding.value({x:e.pageX,y:e.pageY})
      }

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

    const moveDown = (e) => {
      // 鼠标按下，计算当前元素距离可视区的距离

      const disX = e.clientX - dialogHeaderEl.offsetLeft

      const disY = e.clientY - dialogHeaderEl.offsetTop

      // 获取到的值带px 正则匹配替换

      let styL, styT

      // 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 (sty.left.includes('%')) {
        styL = +document.body.clientWidth * (+sty.left.replace(/\%/g, '') / 100)

        styT = +document.body.clientHeight * (+sty.top.replace(/\%/g, '') / 100)
      } else {
        styL = +sty.left.replace(/\px/g, '')

        styT = +sty.top.replace(/\px/g, '')
      }

      document.onmousemove = function(e) {
        // 通过事件委托，计算移动的距离

        const l = e.clientX - disX

        const t = e.clientY - disY

        // 移动当前元素

        dragDom.style.left = `${l + styL}px`

        dragDom.style.top = `${t + styT}px`

        // 将此时的位置传出去

        // binding.value({x:e.pageX,y:e.pageY})
      }

      document.onmouseup = function(e) {
        document.onmousemove = null

        document.onmouseup = null
      }
    }
    // 双击头部全屏效果

    dialogHeaderEl.ondblclick = (e) => {
      if (isFullScreen === false) {
        nowHight = dragDom.clientHeight

        nowWidth = dragDom.clientWidth

        nowMarginTop = dragDom.style.marginTop

        dragDom.style.left = 0

        dragDom.style.top = 0

        dragDom.style.height = '100VH'

        dragDom.style.width = '100VW'

        dragDom.style.marginTop = 0

        isFullScreen = true

        dialogHeaderEl.style.cursor = 'initial'

        dialogHeaderEl.onmousedown = null
      } else {
        dragDom.style.height = nowHight + 'px'

        dragDom.style.width = nowWidth + 'px'

        dragDom.style.marginTop = nowMarginTop

        isFullScreen = false

        dialogHeaderEl.style.cursor = 'move'

        dialogHeaderEl.onmousedown = moveDown
      }
    }
  }
}