marking-cet-web/src/directives/dialogResizeStandard.ts

export const dialogResizeStandard = {
  mounted(el: any, binding: any, vnode: any) {
    const bValue = binding.value
    const localKeyMap: any = {
      positions: {
        'can-resize3': 'cet-standard-positions',
      },
      resize: {
        'can-resize3': 'cet-standard-resize',
      },
    }
    const resizeEvent = new CustomEvent('drag-resize', {
      detail: '尺寸变化',
      bubbles: false,
    })
    // 初始化不最大化
    el.fullscreen = false
    const winHeight = window.innerHeight
    // 弹框可拉伸最小宽高
    const minWidth = 400
    const minHeight = winHeight / 2

    // 弹窗
    const dragDom: any = document.querySelector('.' + binding.value)
    const dialogHeaderEl = dragDom.querySelector('.el-dialog__header')

    el.style.overflow = 'initial'
    dragDom.className += ' el-drag-dialog'
    // 给弹窗加上overflow auto；不然缩小时框内的标签可能超出dialog；
    // dragDom.style.overflow = 'auto'
    dragDom.style.background = '#fff'

    const keyboardPositions = localStorage.getItem(localKeyMap.positions[bValue])
    const keyboardResize = localStorage.getItem(localKeyMap.resize[bValue])
    if (keyboardPositions) {
      dragDom.style.left = JSON.parse(keyboardPositions).left || 0
      dragDom.style.top = JSON.parse(keyboardPositions).top || 0
    }

    if (keyboardResize) {
      const localW = JSON.parse(keyboardResize).width
      const localH = JSON.parse(keyboardResize).height
      localW && (dragDom.style.width = localW)
      localH && (dragDom.style.height = localH)
    } else {
      dragDom.style.height = minHeight + 100 + 'px'
      dragDom.style.width = '800px'
    }

    // 清除选择头部文字效果
    // eslint-disable-next-line no-new-func
    dialogHeaderEl.onselectstart = new Function('return false')
    // 头部加上可拖动cursor
    dialogHeaderEl.style.cursor = 'move'

    // 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)

    // 头部插入最大化最小化元素
    const maxMin = document.createElement('button')
    maxMin.className += ' el-dialog__headerbtn el-dialog__minmax'
    maxMin.style.right = '40px'
    maxMin.style.color = '#ffffff'
    maxMin.title = el.fullscreen ? '还原' : '最大化'
    maxMin.innerHTML =
      '<i class=' +
      (el.fullscreen ? '"el-icon-crop"' : '"el-icon-full-screen"') +
      ' onMouseOver="this.style.color=\'#409EFF\'" onMouseOut="this.style.color=\'inherit\'"></i>'
    dialogHeaderEl.insertBefore(maxMin, dialogHeaderEl.childNodes[1])
    const moveDown = (e: any) => {
      // 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: any, styT: any

      // 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
        console.log('dragDom.style.left:', dragDom.style.left, dragDom.style.top)
        localStorage.setItem(
          localKeyMap.positions[bValue],
          JSON.stringify({
            left: dragDom.style.left || 0,
            top: dragDom.style.top || 0,
          })
        )
      }
    }
    dialogHeaderEl.onmousedown = moveDown

    // 点击放大缩小效果
    // maxMin.onclick = setMaxMin
    // 双击头部效果
    // dialogHeaderEl.ondblclick = setMaxMin
    // 拉伸
    const resizeEl = document.createElement('div')
    dragDom.appendChild(resizeEl)
    // 在弹窗右下角加上一个10-10px的控制块
    resizeEl.style.cursor = 'se-resize'
    resizeEl.style.position = 'absolute'
    resizeEl.style.height = '10px'
    resizeEl.style.width = '10px'
    resizeEl.style.border = '3px solid transparent'
    resizeEl.style.borderRightColor = '#333'
    resizeEl.style.borderBottomColor = '#333'
    resizeEl.style.right = '0px'
    resizeEl.style.bottom = '0px'
    resizeEl.style.zIndex = '99'
    // 鼠标拉伸弹窗
    resizeEl.onmousedown = (e) => {
      // 记录初始x位置
      const clientX = e.clientX
      // 鼠标按下，计算当前元素距离可视区的距离
      const disX = e.clientX - resizeEl.offsetLeft
      const disY = e.clientY - resizeEl.offsetTop
      const iframeMask = document.getElementById('my-iframe-mask')
      if (iframeMask) {
        iframeMask.style.display = 'block'
      }
      document.onmousemove = function (e) {
        e.preventDefault() // 移动时禁用默认事件
        // 通过事件委托，计算移动的距离
        const x = e.clientX - disX + (e.clientX - clientX) // 这里 由于elementUI的dialog控制居中的，所以水平拉伸效果是双倍
        const y = e.clientY - disY
        // 比较是否小于最小宽高
        dragDom.style.width = x > minWidth ? `${x}px` : minWidth + 'px'
        dragDom.style.height = y > minHeight ? `${y}px` : minHeight + 'px'
        // dragDom.style.width = `${x}px`
        // dragDom.style.height = `${y}px`
        // if (!hasSetBodyHight) {
        //   const footerHeight =
        //     dragDom.querySelector('.el-dialog__footer') && dragDom.querySelector('.el-dialog__footer').offsetHeight
        //   dragDom.querySelector('.el-dialog__body').style.height =
        //     'calc(100% - ' + (dialogHeaderEl.offsetHeight + footerHeight) + 'px)'
        //   hasSetBodyHight = true
        // }
      }
      // 拉伸结束
      document.onmouseup = function (e) {
        document.onmousemove = null
        document.onmouseup = null
        localStorage.setItem(
          localKeyMap.resize[bValue],
          JSON.stringify({
            width: dragDom.style.width || 'auto',
            height: dragDom.style.height || 'auto',
          })
        )
        el.dispatchEvent(resizeEvent)
        const iframeMask = document.getElementById('my-iframe-mask')
        if (iframeMask) {
          iframeMask.style.display = 'none'
        }
      }
    }
  },
}