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// 混入代码 
export default {
  data() {
    return {
      resizeData: {
        width: 1920, //设计稿宽
        height: 1080, //设计稿高
        ratio: 16 / 9 //比例
      }
    };
  },
  created() {
    this.refreshScale();
    window.addEventListener("resize", this.refreshScale, false);
    window.addEventListener(
      "pageshow",
      function(e) {
        if (e.persisted) {
          // 浏览器后退的时候重新计算
          this.refreshScale();
        }
      },
      false
    );
  },
  beforeDestroy() {
    window.removeEventListener("reisze", this.refreshScale());
  },
  methods: {
//zoom
setBodyZoom () {
      const t = window.screen.width
      let zoomNum = t / 1920 * 10
      zoomNum = Math.round(zoomNum) / 10
      document.body.style.zoom = zoomNum
    },
    //等比缩放高度铺满
    refreshScale() {
      const bodyStyle = document.createElement("style");
      bodyStyle.innerHTML = `body{width:${this.resizeData.width}px; height:${this.resizeData.height}px!important;background-image: none;background-color: #000517 !important;overflow: hidden;}`;
      document.documentElement.firstElementChild.appendChild(bodyStyle);
      let docWidth = document.documentElement.clientWidth;
      let docHeight = document.documentElement.clientHeight;
      const designWidth = this.resizeData.width,
        designHeight = this.resizeData.height,
        heightRatio = docHeight / designHeight;
      document.body.style =
        "transform:scale(" +
        heightRatio +
        ");transform-origin:left top;margin-left: " +
        (docWidth - designWidth * heightRatio) / 2 +
        "px";
    },
    //// 等比缩放宽度铺满
    refreshScaleWidth() {
      const bodyStyle = document.createElement("style");
      bodyStyle.innerHTML = `body{width:${this.resizeData.width}px; height:${this.resizeData.height}px!important;background-image: none;background-color: #000517 !important;overflow: hidden;}`;
      document.documentElement.firstElementChild.appendChild(bodyStyle);
      let docWidth = document.documentElement.clientWidth;
      const designWidth = this.resizeData.width,
        widthRatio = docWidth / designWidth;
      document.body.style =
        "transform:scale(" + widthRatio + ");transform-origin:left top;";
    },
    //// 全屏铺满    根据宽度100% 高度压缩改变  或者高度100%  宽度压缩改变
    refreshScaleFullh() {
      const bodyStyle = document.createElement("style");
      bodyStyle.innerHTML = `body{width:${this.resizeData.width}px; height:${this.resizeData.height}px!important;background-image: none;background-color: #000517 !important;overflow: hidden;}`;
      document.documentElement.firstElementChild.appendChild(bodyStyle);
      let docWidth = document.documentElement.clientWidth;
      let docHeight = document.documentElement.clientHeight;

      const designWidth = this.resizeData.width,
        designHeight = this.resizeData.height,
        widthRatio = docWidth / designWidth,
        heightRatio = docHeight / designHeight;
      document.body.style =
        "transform:scale(" +
        widthRatio +
        "," +
        heightRatio +
        ");transform-origin:left top;";
    },
    //根据宽度100% 高度不压缩
    refreshScaleFull() {
      let baseWidth = document.documentElement.clientWidth;
      let baseHeight = document.documentElement.clientHeight;
      let appStyle = document.getElementById("app").style;
      let realRatio = baseWidth / baseHeight;
      let designRatio = this.resizeData.ratio;
      let scaleRate = baseWidth / this.resizeData.width;
      if (realRatio > designRatio) {
        scaleRate = baseHeight / this.resizeData.height;
      }
      appStyle.transformOrigin = "left top";
      appStyle.transform = `scale(${scaleRate}) translateX(0%)`;
      appStyle.width = `${baseWidth / scaleRate}px`;
      //然后高度 自适应  里面内容根据flex 跟百分比计算
    }
  }
};

//引入方式

import echartMixins from "@/utils/resizeMixins";
//使用mixins  
mixins: [echartMixins],