text: import Vue from 'vue'
  
  
  /*
  *  使用方法
  *  将以下代码复制到一个js文件中，然后在入口文件main.js中import引入即可；
  *  给elementUI的dialog上加上 v-dialogDrag 指令就可以实现弹窗的全屏和拉伸了。
  *  给dialog设置 :close-on-click-modal="false" , 禁止点击遮罩层关闭弹出层
  *  如果是form表单，不要将提交等按钮放置el-form-item，以免在上下拉伸时被隐藏
  */
  
  // v-dialogDrag: 弹窗拖拽+水平方向伸缩
  
  Vue.directive('dragDialog', {
  
    bind(el, binding, vnode, oldVnode) {
  
      //弹框可拉伸最小宽高
  
      let minWidth = 400;
  
      let minHeight = 300;
  
      //初始非全屏
  
      let isFullScreen = false;
  
      //当前宽高
  
      let nowWidth = 200;
  
      let nowHight = 100;
  
      //当前顶部高度
  
      let nowMarginTop = 0;
  
      //获取弹框头部（这部分可双击全屏）
  
      const dialogHeaderEl = el.querySelector('.el-dialog__header');
  
      //弹窗
  
      const dragDom = el.querySelector('.el-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";
  
      //清除选择头部文字效果
  
      //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);
  
      let 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;
  
        };
  
      }
  
      dialogHeaderEl.onmousedown = moveDown;
  
      //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 = "400px";
  
          dragDom.style.width = nowWidth + 'px';
  
          dragDom.style.marginTop = nowMarginTop;
  
          isFullScreen = false;
  
          dialogHeaderEl.style.cursor = 'move';
  
          dialogHeaderEl.onmousedown = moveDown;
  
        }
  
      }
  
      dragDom.onmousemove = function (e) {
  
        let moveE = e;
  
        if (e.clientX > dragDom.offsetLeft + dragDom.clientWidth - 10 || dragDom.offsetLeft + 10 > e.clientX) {
  
          dragDom.style.cursor = 'w-resize';
  
        } else if (el.scrollTop + e.clientY > dragDom.offsetTop + dragDom.clientHeight - 10) {
  
          dragDom.style.cursor = 's-resize';
  
        } else {
  
          dragDom.style.cursor = 'default';
  
          dragDom.onmousedown = null;
  
        }
  
        dragDom.onmousedown = (e) => {
  
          const clientX = e.clientX;
  
          const clientY = e.clientY;
  
          let elW = dragDom.clientWidth;
  
          let elH = dragDom.clientHeight;
  
          let EloffsetLeft = dragDom.offsetLeft;
  
          let EloffsetTop = dragDom.offsetTop;
  
          dragDom.style.userSelect = 'none';
  
          let ELscrollTop = el.scrollTop;
  
          //判断点击的位置是不是为头部
  
          if (clientX > EloffsetLeft && clientX < EloffsetLeft + elW && clientY > EloffsetTop && clientY < EloffsetTop + 100) {
  
            //如果是头部在此就不做任何动作，以上有绑定dialogHeaderEl.onmousedown = moveDown;
  
          }else{
  
            document.onmousemove = function (e) {
  
              e.preventDefault(); // 移动时禁用默认事件
  
              //左侧鼠标拖拽位置
  
              if (clientX > EloffsetLeft && clientX < EloffsetLeft + 10) {
  
                //往左拖拽
  
                if (clientX > e.clientX) {
  
                  dragDom.style.width = elW + (clientX - e.clientX) * 2 + 'px';
  
                }
  
                //往右拖拽
  
                if (clientX < e.clientX) {
  
                  if(dragDom.clientWidth < minWidth){
  
                  }else{
  
                    dragDom.style.width = elW - (e.clientX - clientX) * 2 + 'px';
  
                  }
  
                }
  
              }
  
              //右侧鼠标拖拽位置
  
              if (clientX > EloffsetLeft + elW - 10 && clientX < EloffsetLeft + elW) {
  
                //往左拖拽
  
                if (clientX > e.clientX) {
  
                  if (dragDom.clientWidth < minWidth) {
  
                  } else {
  
                    dragDom.style.width = elW - (clientX - e.clientX)+ 'px';
  
                  }
  
                }
  
                //往右拖拽
  
                if (clientX < e.clientX) {
  
                  dragDom.style.width = elW + (e.clientX - clientX)  + 'px';
  
                }
  
              }
  
              //底部鼠标拖拽位置
  
              if (ELscrollTop + clientY > EloffsetTop + elH - 20 && ELscrollTop + clientY < EloffsetTop + elH) {
  
                //往上拖拽
  
                if (clientY > e.clientY) {
  
                  if (dragDom.clientHeight < minHeight) {
  
                  } else {
  
                    dragDom.style.height = elH - (clientY - e.clientY) * 2 + 'px';
  
                  }
  
                }
  
                //往下拖拽
  
                if (clientY < e.clientY) {
  
                  dragDom.style.height = elH + (e.clientY - clientY) * 2 + 'px';
  
                }
  
              }
  
            };
  
            //拉伸结束
  
            document.onmouseup = function (e) {
  
              document.onmousemove = null;
  
              document.onmouseup = null;
  
            };
  
          }
  
        }
  
      }
  
    }
  
  })
  
  // v-dialogDrag: 弹窗拖拽
  Vue.directive('dialogDrag', {
    bind(el, binding, vnode, oldVnode) {
      const dialogHeaderEl = el.querySelector('.el-dialog__header')
      const dragDom = el.querySelector('.el-dialog')
      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)
  
      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
        }
      }
    }
  })
  
  Vue.directive('alterELDialogMarginTop' /*修改elementUI中el-dialog顶部的距离,传入值eg:{marginTop:'5vh'} */ , {
    inserted(el, binding, vnode) {
      el.firstElementChild.style.marginTop = binding.value.marginTop
    }
  })
  