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ruoyi-ui/src/utils/print_echarts.js

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+// 打印类属性、方法定义
+/* eslint-disable */
+const PrintEcharts = function (dom, options) {
+  if (!(this instanceof PrintEcharts)) return new PrintEcharts(dom, options);
+ 
+  this.options = this.extend({
+    'noPrint': '.no-print'
+  }, options);
+ 
+  if ((typeof dom) === "string") {
+    this.dom = document.querySelector(dom);
+  } else {
+    this.isDOM(dom)
+    this.dom = this.isDOM(dom) ? dom : dom.$el;
+  }
+ 
+  this.init();
+};
+PrintEcharts.prototype = {
+  init: function () {
+    var content = this.getStyle() + this.getHtml();
+    this.writeIframe(content);
+  },
+  extend: function (obj, obj2) {
+    for (var k in obj2) {
+      obj[k] = obj2[k];
+    }
+    return obj;
+  },
+ 
+  getStyle: function () {
+    var str = "",
+      styles = document.querySelectorAll('style,link');
+    for (var i = 0; i < styles.length; i++) {
+      str += styles[i].outerHTML;
+    }
+    str += "<style>" + (this.options.notPrint ? this.options.notPrint : '.no-print') + "{display:none;}</style>";
+    str += "<style>.results{width:100%!important;} .result .title{width:100%;}</style>";
+ 
+    return str;
+  },
+ 
+  getHtml: function () {
+    var inputs = document.querySelectorAll('input');
+    var textareas = document.querySelectorAll('textarea');
+    var selects = document.querySelectorAll('select');
+    var canvass = document.querySelectorAll('canvas');
+    for (var k = 0; k < inputs.length; k++) {
+      if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
+        if (inputs[k].checked == true) {
+          inputs[k].setAttribute('checked', "checked")
+        } else {
+          inputs[k].removeAttribute('checked')
+        }
+      } else if (inputs[k].type == "text") {
+        inputs[k].setAttribute('value', inputs[k].value)
+      } else {
+        inputs[k].setAttribute('value', inputs[k].value)
+      }
+    }
+ 
+    for (var k2 = 0; k2 < textareas.length; k2++) {
+      if (textareas[k2].type == 'textarea') {
+        textareas[k2].innerHTML = textareas[k2].value
+      }
+    }
+ 
+    for (var k3 = 0; k3 < selects.length; k3++) {
+      if (selects[k3].type == 'select-one') {
+        var child = selects[k3].children;
+        for (var i in child) {
+          if (child[i].tagName == 'OPTION') {
+            if (child[i].selected == true) {
+              child[i].setAttribute('selected', "selected")
+            } else {
+              child[i].removeAttribute('selected')
+            }
+          }
+        }
+      }
+    }
+    //canvass echars图表转为图片
+    for (var k4 = 0; k4 < canvass.length; k4++) {
+      var imageURL = canvass[k4].toDataURL("image/png");
+      var img = document.createElement("img");
+      img.src = imageURL;
+      img.setAttribute('style', 'max-width: 100%;');
+      img.className = 'isNeedRemove'
+      // canvass[k4].style.display = 'none'
+      // canvass[k4].parentNode.style.width = '100%'
+      // canvass[k4].parentNode.style.textAlign = 'center'
+      canvass[k4].parentNode.insertBefore(img,canvass[k4].nextElementSibling);
+    }
+    //做分页
+    //style="page-break-after: always"
+    var pages = document.querySelectorAll('.app-container');
+    for (var k5 = 0; k5 < pages.length; k5++) {
+      pages[k5].setAttribute('style', 'page-break-after: always');
+    }
+    return this.dom.outerHTML;
+  },
+ 
+  writeIframe: function (content) {
+    var w, doc, iframe = document.createElement('iframe'),
+      f = document.body.appendChild(iframe);
+    iframe.id = "myIframe";
+    //iframe.style = "position:absolute;width:0;height:0;top:-10px;left:-10px;";
+    iframe.setAttribute('style', 'position:absolute;width:' + document.querySelector('#seven').clientWidth + 'px;height:0;top:-10px;left:-10px;');
+    w = f.contentWindow || f.contentDocument;
+    doc = f.contentDocument || f.contentWindow.document;
+    doc.open();
+    doc.write(content);
+    doc.close();
+ 
+    var removes = document.querySelectorAll('.isNeedRemove');
+    for (var k = 0; k < removes.length; k++) {
+      removes[k].parentNode.removeChild(removes[k]);
+    }
+ 
+    var _this = this
+    iframe.onload = function(){
+      _this.toPrint(w);
+      setTimeout(function () {
+        document.body.removeChild(iframe)
+      }, 100)
+    }
+  },
+ 
+  toPrint: function (frameWindow) {
+    try {
+      setTimeout(function () {
+        frameWindow.focus();
+        try {
+          if (!frameWindow.document.execCommand('print', false, null)) {
+            frameWindow.print();
+          }
+        } catch (e) {
+          frameWindow.print();
+        }
+        frameWindow.close();
+      }, 10);
+    } catch (err) {
+      console.log('err', err);
+    }
+  },
+  isDOM: (typeof HTMLElement === 'object') ?
+    function (obj) {
+      return obj instanceof HTMLElement;
+    } :
+    function (obj) {
+      return obj && typeof obj === 'object' && obj.nodeType === 1 && typeof obj.nodeName === 'string';
+    }
+};
+const MyPluginEcharts = {}
+MyPluginEcharts.install = function (Vue, options) {
+  // 4. 添加实例方法
+  Vue.prototype.$printecharts = PrintEcharts
+}
+export default MyPluginEcharts