text: (function (global, factory) {
  	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
  	typeof define === 'function' && define.amd ? define(factory) :
  	(global.wangEditor = factory());
  }(this, (function () { 'use strict';
  
  /*
      poly-fill
  */
  
  var polyfill = function () {
  
      // Object.assign
      if (typeof Object.assign != 'function') {
          Object.assign = function (target, varArgs) {
              // .length of function is 2
              if (target == null) {
                  // TypeError if undefined or null
                  throw new TypeError('Cannot convert undefined or null to object');
              }
  
              var to = Object(target);
  
              for (var index = 1; index < arguments.length; index++) {
                  var nextSource = arguments[index];
  
                  if (nextSource != null) {
                      // Skip over if undefined or null
                      for (var nextKey in nextSource) {
                          // Avoid bugs when hasOwnProperty is shadowed
                          if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
                              to[nextKey] = nextSource[nextKey];
                          }
                      }
                  }
              }
              return to;
          };
      }
  
      // IE 中兼容 Element.prototype.matches
      if (!Element.prototype.matches) {
          Element.prototype.matches = Element.prototype.matchesSelector || Element.prototype.mozMatchesSelector || Element.prototype.msMatchesSelector || Element.prototype.oMatchesSelector || Element.prototype.webkitMatchesSelector || function (s) {
              var matches = (this.document || this.ownerDocument).querySelectorAll(s),
                  i = matches.length;
              while (--i >= 0 && matches.item(i) !== this) {}
              return i > -1;
          };
      }
  };
  
  /*
      DOM 操作 API
  */
  
  // 根据 html 代码片段创建 dom 对象
  function createElemByHTML(html) {
      var div = void 0;
      div = document.createElement('div');
      div.innerHTML = html;
      return div.children;
  }
  
  // 是否是 DOM List
  function isDOMList(selector) {
      if (!selector) {
          return false;
      }
      if (selector instanceof HTMLCollection || selector instanceof NodeList) {
          return true;
      }
      return false;
  }
  
  // 封装 document.querySelectorAll
  function querySelectorAll(selector) {
      var result = document.querySelectorAll(selector);
      if (isDOMList(result)) {
          return result;
      } else {
          return [result];
      }
  }
  
  // 创建构造函数
  function DomElement(selector) {
      if (!selector) {
          return;
      }
  
      // selector 本来就是 DomElement 对象，直接返回
      if (selector instanceof DomElement) {
          return selector;
      }
  
      this.selector = selector;
  
      // 根据 selector 得出的结果（如 DOM，DOM List）
      var selectorResult = [];
      if (selector.nodeType === 1) {
          // 单个 DOM 节点
          selectorResult = [selector];
      } else if (isDOMList(selector)) {
          // DOM List
          selectorResult = selector;
      } else if (typeof selector === 'string') {
          // 字符串
          selector = selector.replace('/\n/mg', '').trim();
          if (selector.indexOf('<') === 0) {
              // 如 <div>
              selectorResult = createElemByHTML(selector);
          } else {
              // 如 #id .class
              selectorResult = querySelectorAll(selector);
          }
      }
  
      var length = selectorResult.length;
      if (!length) {
          // 空数组
          return this;
      }
  
      // 加入 DOM 节点
      var i = void 0;
      for (i = 0; i < length; i++) {
          this[i] = selectorResult[i];
      }
      this.length = length;
  }
  
  // 修改原型
  DomElement.prototype = {
      constructor: DomElement,
  
      // 类数组，forEach
      forEach: function forEach(fn) {
          var i = void 0;
          for (i = 0; i < this.length; i++) {
              var elem = this[i];
              var result = fn.call(elem, elem, i);
              if (result === false) {
                  break;
              }
          }
          return this;
      },
  
      // 获取第几个元素
      get: function get(index) {
          var length = this.length;
          if (index >= length) {
              index = index % length;
          }
          return $(this[index]);
      },
  
      // 第一个
      first: function first() {
          return this.get(0);
      },
  
      // 最后一个
      last: function last() {
          var length = this.length;
          return this.get(length - 1);
      },
  
      // 绑定事件
      on: function on(type, selector, fn) {
          // selector 不为空，证明绑定事件要加代理
          if (!fn) {
              fn = selector;
              selector = null;
          }
  
          // type 是否有多个
          var types = [];
          types = type.split(/\s+/);
  
          return this.forEach(function (elem) {
              types.forEach(function (type) {
                  if (!type) {
                      return;
                  }
  
                  if (!selector) {
                      // 无代理
                      elem.addEventListener(type, fn, false);
                      return;
                  }
  
                  // 有代理
                  elem.addEventListener(type, function (e) {
                      var target = e.target;
                      if (target.matches(selector)) {
                          fn.call(target, e);
                      }
                  }, false);
              });
          });
      },
  
      // 取消事件绑定
      off: function off(type, fn) {
          return this.forEach(function (elem) {
              elem.removeEventListener(type, fn, false);
          });
      },
  
      // 获取/设置 属性
      attr: function attr(key, val) {
          if (val == null) {
              // 获取值
              return this[0].getAttribute(key);
          } else {
              // 设置值
              return this.forEach(function (elem) {
                  elem.setAttribute(key, val);
              });
          }
      },
  
      // 添加 class
      addClass: function addClass(className) {
          if (!className) {
              return this;
          }
          return this.forEach(function (elem) {
              var arr = void 0;
              if (elem.className) {
                  // 解析当前 className 转换为数组
                  arr = elem.className.split(/\s/);
                  arr = arr.filter(function (item) {
                      return !!item.trim();
                  });
                  // 添加 class
                  if (arr.indexOf(className) < 0) {
                      arr.push(className);
                  }
                  // 修改 elem.class
                  elem.className = arr.join(' ');
              } else {
                  elem.className = className;
              }
          });
      },
  
      // 删除 class
      removeClass: function removeClass(className) {
          if (!className) {
              return this;
          }
          return this.forEach(function (elem) {
              var arr = void 0;
              if (elem.className) {
                  // 解析当前 className 转换为数组
                  arr = elem.className.split(/\s/);
                  arr = arr.filter(function (item) {
                      item = item.trim();
                      // 删除 class
                      if (!item || item === className) {
                          return false;
                      }
                      return true;
                  });
                  // 修改 elem.class
                  elem.className = arr.join(' ');
              }
          });
      },
  
      // 修改 css
      css: function css(key, val) {
          var currentStyle = key + ':' + val + ';';
          return this.forEach(function (elem) {
              var style = (elem.getAttribute('style') || '').trim();
              var styleArr = void 0,
                  resultArr = [];
              if (style) {
                  // 将 style 按照 ; 拆分为数组
                  styleArr = style.split(';');
                  styleArr.forEach(function (item) {
                      // 对每项样式，按照 : 拆分为 key 和 value
                      var arr = item.split(':').map(function (i) {
                          return i.trim();
                      });
                      if (arr.length === 2) {
                          resultArr.push(arr[0] + ':' + arr[1]);
                      }
                  });
                  // 替换或者新增
                  resultArr = resultArr.map(function (item) {
                      if (item.indexOf(key) === 0) {
                          return currentStyle;
                      } else {
                          return item;
                      }
                  });
                  if (resultArr.indexOf(currentStyle) < 0) {
                      resultArr.push(currentStyle);
                  }
                  // 结果
                  elem.setAttribute('style', resultArr.join('; '));
              } else {
                  // style 无值
                  elem.setAttribute('style', currentStyle);
              }
          });
      },
  
      // 显示
      show: function show() {
          return this.css('display', 'block');
      },
  
      // 隐藏
      hide: function hide() {
          return this.css('display', 'none');
      },
  
      // 获取子节点
      children: function children() {
          var elem = this[0];
          if (!elem) {
              return null;
          }
  
          return $(elem.children);
      },
  
      // 增加子节点
      append: function append($children) {
          return this.forEach(function (elem) {
              $children.forEach(function (child) {
                  elem.appendChild(child);
              });
          });
      },
  
      // 移除当前节点
      remove: function remove() {
          return this.forEach(function (elem) {
              if (elem.remove) {
                  elem.remove();
              } else {
                  var parent = elem.parentElement;
                  parent && parent.removeChild(elem);
              }
          });
      },
  
      // 是否包含某个子节点
      isContain: function isContain($child) {
          var elem = this[0];
          var child = $child[0];
          return elem.contains(child);
      },
  
      // 尺寸数据
      getSizeData: function getSizeData() {
          var elem = this[0];
          return elem.getBoundingClientRect(); // 可得到 bottom height left right top width 的数据
      },
  
      // 封装 nodeName
      getNodeName: function getNodeName() {
          var elem = this[0];
          return elem.nodeName;
      },
  
      // 从当前元素查找
      find: function find(selector) {
          var elem = this[0];
          return $(elem.querySelectorAll(selector));
      },
  
      // 获取当前元素的 text
      text: function text(val) {
          if (!val) {
              // 获取 text
              var elem = this[0];
              return elem.innerHTML.replace(/<.*?>/g, function () {
                  return '';
              });
          } else {
              // 设置 text
              return this.forEach(function (elem) {
                  elem.innerHTML = val;
              });
          }
      },
  
      // 获取 html
      html: function html(value) {
          var elem = this[0];
          if (value == null) {
              return elem.innerHTML;
          } else {
              elem.innerHTML = value;
              return this;
          }
      },
  
      // 获取 value
      val: function val() {
          var elem = this[0];
          return elem.value.trim();
      },
  
      // focus
      focus: function focus() {
          return this.forEach(function (elem) {
              elem.focus();
          });
      },
  
      // parent
      parent: function parent() {
          var elem = this[0];
          return $(elem.parentElement);
      },
  
      // parentUntil 找到符合 selector 的父节点
      parentUntil: function parentUntil(selector, _currentElem) {
          var results = document.querySelectorAll(selector);
          var length = results.length;
          if (!length) {
              // 传入的 selector 无效
              return null;
          }
  
          var elem = _currentElem || this[0];
          if (elem.nodeName === 'BODY') {
              return null;
          }
  
          var parent = elem.parentElement;
          var i = void 0;
          for (i = 0; i < length; i++) {
              if (parent === results[i]) {
                  // 找到，并返回
                  return $(parent);
              }
          }
  
          // 继续查找
          return this.parentUntil(selector, parent);
      },
  
      // 判断两个 elem 是否相等
      equal: function equal($elem) {
          if ($elem.nodeType === 1) {
              return this[0] === $elem;
          } else {
              return this[0] === $elem[0];
          }
      },
  
      // 将该元素插入到某个元素前面
      insertBefore: function insertBefore(selector) {
          var $referenceNode = $(selector);
          var referenceNode = $referenceNode[0];
          if (!referenceNode) {
              return this;
          }
          return this.forEach(function (elem) {
              var parent = referenceNode.parentNode;
              parent.insertBefore(elem, referenceNode);
          });
      },
  
      // 将该元素插入到某个元素后面
      insertAfter: function insertAfter(selector) {
          var $referenceNode = $(selector);
          var referenceNode = $referenceNode[0];
          if (!referenceNode) {
              return this;
          }
          return this.forEach(function (elem) {
              var parent = referenceNode.parentNode;
              if (parent.lastChild === referenceNode) {
                  // 最后一个元素
                  parent.appendChild(elem);
              } else {
                  // 不是最后一个元素
                  parent.insertBefore(elem, referenceNode.nextSibling);
              }
          });
      }
  };
  
  // new 一个对象
  function $(selector) {
      return new DomElement(selector);
  }
  
  /*
      配置信息
  */
  
  var config = {
  
      // 默认菜单配置
      menus: ['head', 'bold', 'italic', 'underline', 'strikeThrough', 'foreColor', 'backColor', 'link', 'list', 'justify', 'quote', 'emoticon', 'image', 'table', 'video', 'code', 'undo', 'redo'],
  
      // // 语言配置
      // lang: {
      //     '设置标题': 'title',
      //     '正文': 'p',
      //     '链接文字': 'link text',
      //     '链接': 'link',
      //     '插入': 'insert',
      //     '创建': 'init'
      // },
  
      // 编辑区域的 z-index
      zIndex: 10000,
  
      // 是否开启 debug 模式（debug 模式下错误会 throw error 形式抛出）
      debug: false,
  
      // 粘贴过滤样式，默认开启
      pasteFilterStyle: true,
  
      // onchange 事件
      // onchange: function (html) {
      //     // html 即变化之后的内容
      //     console.log(html)
      // },
  
      // 是否显示添加网络图片的 tab
      showLinkImg: true,
  
      // 默认上传图片 max size: 5M
      uploadImgMaxSize: 5 * 1024 * 1024,
  
      // 配置一次最多上传几个图片
      // uploadImgMaxLength: 5,
  
      // 上传图片，是否显示 base64 格式
      uploadImgShowBase64: false,
  
      // 上传图片，server 地址（如果有值，则 base64 格式的配置则失效）
      // uploadImgServer: '/upload',
  
      // 自定义配置 filename
      uploadFileName: '',
  
      // 上传图片的自定义参数
      uploadImgParams: {
          // token: 'abcdef12345'
      },
  
      // 上传图片的自定义header
      uploadImgHeaders: {
          // 'Accept': 'text/x-json'
      },
  
      // 配置 XHR withCredentials
      withCredentials: false,
  
      // 自定义上传图片超时时间 ms
      uploadImgTimeout: 10000,
  
      // 上传图片 hook 
      uploadImgHooks: {
          // customInsert: function (insertLinkImg, result, editor) {
          //     console.log('customInsert')
          //     // 图片上传并返回结果，自定义插入图片的事件，而不是编辑器自动插入图片
          //     const data = result.data1 || []
          //     data.forEach(link => {
          //         insertLinkImg(link)
          //     })
          // },
          before: function before(xhr, editor, files) {
              // 图片上传之前触发
  
              // 如果返回的结果是 {prevent: true, msg: 'xxxx'} 则表示用户放弃上传
              // return {
              //     prevent: true,
              //     msg: '放弃上传'
              // }
          },
          success: function success(xhr, editor, result) {
              // 图片上传并返回结果，图片插入成功之后触发
          },
          fail: function fail(xhr, editor, result) {
              // 图片上传并返回结果，但图片插入错误时触发
          },
          error: function error(xhr, editor) {
              // 图片上传出错时触发
          },
          timeout: function timeout(xhr, editor) {
              // 图片上传超时时触发
          }
      },
  
      // 是否上传七牛云，默认为 false
      qiniu: false
  
  };
  
  /*
      工具
  */
  
  // 和 UA 相关的属性
  var UA = {
      _ua: navigator.userAgent,
  
      // 是否 webkit
      isWebkit: function isWebkit() {
          var reg = /webkit/i;
          return reg.test(this._ua);
      },
  
      // 是否 IE
      isIE: function isIE() {
          return 'ActiveXObject' in window;
      }
  };
  
  // 遍历对象
  function objForEach(obj, fn) {
      var key = void 0,
          result = void 0;
      for (key in obj) {
          if (obj.hasOwnProperty(key)) {
              result = fn.call(obj, key, obj[key]);
              if (result === false) {
                  break;
              }
          }
      }
  }
  
  // 遍历类数组
  function arrForEach(fakeArr, fn) {
      var i = void 0,
          item = void 0,
          result = void 0;
      var length = fakeArr.length || 0;
      for (i = 0; i < length; i++) {
          item = fakeArr[i];
          result = fn.call(fakeArr, item, i);
          if (result === false) {
              break;
          }
      }
  }
  
  // 获取随机数
  function getRandom(prefix) {
      return prefix + Math.random().toString().slice(2);
  }
  
  // 替换 html 特殊字符
  function replaceHtmlSymbol(html) {
      if (html == null) {
          return '';
      }
      return html.replace(/</gm, '&lt;').replace(/>/gm, '&gt;').replace(/"/gm, '&quot;');
  }
  
  // 返回百分比的格式
  
  /*
      bold-menu
  */
  // 构造函数
  function Bold(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu">\n            <i class="w-e-icon-bold"><i/>\n        </div>');
      this.type = 'click';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Bold.prototype = {
      constructor: Bold,
  
      // 点击事件
      onClick: function onClick(e) {
          // 点击菜单将触发这里
  
          var editor = this.editor;
          var isSeleEmpty = editor.selection.isSelectionEmpty();
  
          if (isSeleEmpty) {
              // 选区是空的，插入并选中一个“空白”
              editor.selection.createEmptyRange();
          }
  
          // 执行 bold 命令
          editor.cmd.do('bold');
  
          if (isSeleEmpty) {
              // 需要将选取折叠起来
              editor.selection.collapseRange();
              editor.selection.restoreSelection();
          }
      },
  
      // 试图改变 active 状态
      tryChangeActive: function tryChangeActive(e) {
          var editor = this.editor;
          var $elem = this.$elem;
          if (editor.cmd.queryCommandState('bold')) {
              this._active = true;
              $elem.addClass('w-e-active');
          } else {
              this._active = false;
              $elem.removeClass('w-e-active');
          }
      }
  };
  
  /*
      替换多语言
   */
  
  var replaceLang = function (editor, str) {
      var langArgs = editor.config.langArgs || [];
      var result = str;
  
      langArgs.forEach(function (item) {
          var reg = item.reg;
          var val = item.val;
  
          if (reg.test(result)) {
              result = result.replace(reg, function () {
                  return val;
              });
          }
      });
  
      return result;
  };
  
  /*
      droplist
  */
  var _emptyFn = function _emptyFn() {};
  
  // 构造函数
  function DropList(menu, opt) {
      var _this = this;
  
      // droplist 所依附的菜单
      var editor = menu.editor;
      this.menu = menu;
      this.opt = opt;
      // 容器
      var $container = $('<div class="w-e-droplist"></div>');
  
      // 标题
      var $title = opt.$title;
      var titleHtml = void 0;
      if ($title) {
          // 替换多语言
          titleHtml = $title.html();
          titleHtml = replaceLang(editor, titleHtml);
          $title.html(titleHtml);
  
          $title.addClass('w-e-dp-title');
          $container.append($title);
      }
  
      var list = opt.list || [];
      var type = opt.type || 'list'; // 'list' 列表形式（如“标题”菜单） / 'inline-block' 块状形式（如“颜色”菜单）
      var onClick = opt.onClick || _emptyFn;
  
      // 加入 DOM 并绑定事件
      var $list = $('<ul class="' + (type === 'list' ? 'w-e-list' : 'w-e-block') + '"></ul>');
      $container.append($list);
      list.forEach(function (item) {
          var $elem = item.$elem;
  
          // 替换多语言
          var elemHtml = $elem.html();
          elemHtml = replaceLang(editor, elemHtml);
          $elem.html(elemHtml);
  
          var value = item.value;
          var $li = $('<li class="w-e-item"></li>');
          if ($elem) {
              $li.append($elem);
              $list.append($li);
              $elem.on('click', function (e) {
                  onClick(value);
  
                  // 隐藏
                  _this.hideTimeoutId = setTimeout(function () {
                      _this.hide();
                  }, 0);
              });
          }
      });
  
      // 绑定隐藏事件
      $container.on('mouseleave', function (e) {
          _this.hideTimeoutId = setTimeout(function () {
              _this.hide();
          }, 0);
      });
  
      // 记录属性
      this.$container = $container;
  
      // 基本属性
      this._rendered = false;
      this._show = false;
  }
  
  // 原型
  DropList.prototype = {
      constructor: DropList,
  
      // 显示（插入DOM）
      show: function show() {
          if (this.hideTimeoutId) {
              // 清除之前的定时隐藏
              clearTimeout(this.hideTimeoutId);
          }
  
          var menu = this.menu;
          var $menuELem = menu.$elem;
          var $container = this.$container;
          if (this._show) {
              return;
          }
          if (this._rendered) {
              // 显示
              $container.show();
          } else {
              // 加入 DOM 之前先定位位置
              var menuHeight = $menuELem.getSizeData().height || 0;
              var width = this.opt.width || 100; // 默认为 100
              $container.css('margin-top', menuHeight + 'px').css('width', width + 'px');
  
              // 加入到 DOM
              $menuELem.append($container);
              this._rendered = true;
          }
  
          // 修改属性
          this._show = true;
      },
  
      // 隐藏（移除DOM）
      hide: function hide() {
          if (this.showTimeoutId) {
              // 清除之前的定时显示
              clearTimeout(this.showTimeoutId);
          }
  
          var $container = this.$container;
          if (!this._show) {
              return;
          }
          // 隐藏并需改属性
          $container.hide();
          this._show = false;
      }
  };
  
  /*
      menu - header
  */
  // 构造函数
  function Head(editor) {
      var _this = this;
  
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu"><i class="w-e-icon-header"><i/></div>');
      this.type = 'droplist';
  
      // 当前是否 active 状态
      this._active = false;
  
      // 初始化 droplist
      this.droplist = new DropList(this, {
          width: 100,
          $title: $('<p>设置标题</p>'),
          type: 'list', // droplist 以列表形式展示
          list: [{ $elem: $('<h1>H1</h1>'), value: '<h1>' }, { $elem: $('<h2>H2</h2>'), value: '<h2>' }, { $elem: $('<h3>H3</h3>'), value: '<h3>' }, { $elem: $('<h4>H4</h4>'), value: '<h4>' }, { $elem: $('<h5>H5</h5>'), value: '<h5>' }, { $elem: $('<p>正文</p>'), value: '<p>' }],
          onClick: function onClick(value) {
              // 注意 this 是指向当前的 Head 对象
              _this._command(value);
          }
      });
  }
  
  // 原型
  Head.prototype = {
      constructor: Head,
  
      // 执行命令
      _command: function _command(value) {
          var editor = this.editor;
  
          var $selectionElem = editor.selection.getSelectionContainerElem();
          if (editor.$textElem.equal($selectionElem)) {
              // 不能选中多行来设置标题，否则会出现问题
              // 例如选中的是 <p>xxx</p><p>yyy</p> 来设置标题，设置之后会成为 <h1>xxx<br>yyy</h1> 不符合预期
              return;
          }
  
          editor.cmd.do('formatBlock', value);
      },
  
      // 试图改变 active 状态
      tryChangeActive: function tryChangeActive(e) {
          var editor = this.editor;
          var $elem = this.$elem;
          var reg = /^h/i;
          var cmdValue = editor.cmd.queryCommandValue('formatBlock');
          if (reg.test(cmdValue)) {
              this._active = true;
              $elem.addClass('w-e-active');
          } else {
              this._active = false;
              $elem.removeClass('w-e-active');
          }
      }
  };
  
  /*
      panel
  */
  
  var emptyFn = function emptyFn() {};
  
  // 记录已经显示 panel 的菜单
  var _isCreatedPanelMenus = [];
  
  // 构造函数
  function Panel(menu, opt) {
      this.menu = menu;
      this.opt = opt;
  }
  
  // 原型
  Panel.prototype = {
      constructor: Panel,
  
      // 显示（插入DOM）
      show: function show() {
          var _this = this;
  
          var menu = this.menu;
          if (_isCreatedPanelMenus.indexOf(menu) >= 0) {
              // 该菜单已经创建了 panel 不能再创建
              return;
          }
  
          var editor = menu.editor;
          var $body = $('body');
          var $textContainerElem = editor.$textContainerElem;
          var opt = this.opt;
  
          // panel 的容器
          var $container = $('<div class="w-e-panel-container"></div>');
          var width = opt.width || 300; // 默认 300px
          $container.css('width', width + 'px').css('margin-left', (0 - width) / 2 + 'px');
  
          // 添加关闭按钮
          var $closeBtn = $('<i class="w-e-icon-close w-e-panel-close"></i>');
          $container.append($closeBtn);
          $closeBtn.on('click', function () {
              _this.hide();
          });
  
          // 准备 tabs 容器
          var $tabTitleContainer = $('<ul class="w-e-panel-tab-title"></ul>');
          var $tabContentContainer = $('<div class="w-e-panel-tab-content"></div>');
          $container.append($tabTitleContainer).append($tabContentContainer);
  
          // 设置高度
          var height = opt.height;
          if (height) {
              $tabContentContainer.css('height', height + 'px').css('overflow-y', 'auto');
          }
  
          // tabs
          var tabs = opt.tabs || [];
          var tabTitleArr = [];
          var tabContentArr = [];
          tabs.forEach(function (tab, tabIndex) {
              if (!tab) {
                  return;
              }
              var title = tab.title || '';
              var tpl = tab.tpl || '';
  
              // 替换多语言
              title = replaceLang(editor, title);
              tpl = replaceLang(editor, tpl);
  
              // 添加到 DOM
              var $title = $('<li class="w-e-item">' + title + '</li>');
              $tabTitleContainer.append($title);
              var $content = $(tpl);
              $tabContentContainer.append($content);
  
              // 记录到内存
              $title._index = tabIndex;
              tabTitleArr.push($title);
              tabContentArr.push($content);
  
              // 设置 active 项
              if (tabIndex === 0) {
                  $title._active = true;
                  $title.addClass('w-e-active');
              } else {
                  $content.hide();
              }
  
              // 绑定 tab 的事件
              $title.on('click', function (e) {
                  if ($title._active) {
                      return;
                  }
                  // 隐藏所有的 tab
                  tabTitleArr.forEach(function ($title) {
                      $title._active = false;
                      $title.removeClass('w-e-active');
                  });
                  tabContentArr.forEach(function ($content) {
                      $content.hide();
                  });
  
                  // 显示当前的 tab
                  $title._active = true;
                  $title.addClass('w-e-active');
                  $content.show();
              });
          });
  
          // 绑定关闭事件
          $container.on('click', function (e) {
              // 点击时阻止冒泡
              e.stopPropagation();
          });
          $body.on('click', function (e) {
              _this.hide();
          });
  
          // 添加到 DOM
          $textContainerElem.append($container);
  
          // 绑定 opt 的事件，只有添加到 DOM 之后才能绑定成功
          tabs.forEach(function (tab, index) {
              if (!tab) {
                  return;
              }
              var events = tab.events || [];
              events.forEach(function (event) {
                  var selector = event.selector;
                  var type = event.type;
                  var fn = event.fn || emptyFn;
                  var $content = tabContentArr[index];
                  $content.find(selector).on(type, function (e) {
                      e.stopPropagation();
                      var needToHide = fn(e);
                      // 执行完事件之后，是否要关闭 panel
                      if (needToHide) {
                          _this.hide();
                      }
                  });
              });
          });
  
          // focus 第一个 elem
          var $inputs = $container.find('input[type=text],textarea');
          if ($inputs.length) {
              $inputs.get(0).focus();
          }
  
          // 添加到属性
          this.$container = $container;
  
          // 隐藏其他 panel
          this._hideOtherPanels();
          // 记录该 menu 已经创建了 panel
          _isCreatedPanelMenus.push(menu);
      },
  
      // 隐藏（移除DOM）
      hide: function hide() {
          var menu = this.menu;
          var $container = this.$container;
          if ($container) {
              $container.remove();
          }
  
          // 将该 menu 记录中移除
          _isCreatedPanelMenus = _isCreatedPanelMenus.filter(function (item) {
              if (item === menu) {
                  return false;
              } else {
                  return true;
              }
          });
      },
  
      // 一个 panel 展示时，隐藏其他 panel
      _hideOtherPanels: function _hideOtherPanels() {
          if (!_isCreatedPanelMenus.length) {
              return;
          }
          _isCreatedPanelMenus.forEach(function (menu) {
              var panel = menu.panel || {};
              if (panel.hide) {
                  panel.hide();
              }
          });
      }
  };
  
  /*
      menu - link
  */
  // 构造函数
  function Link(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu"><i class="w-e-icon-link"><i/></div>');
      this.type = 'panel';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Link.prototype = {
      constructor: Link,
  
      // 点击事件
      onClick: function onClick(e) {
          var editor = this.editor;
          var $linkelem = void 0;
  
          if (this._active) {
              // 当前选区在链接里面
              $linkelem = editor.selection.getSelectionContainerElem();
              if (!$linkelem) {
                  return;
              }
              // 将该元素都包含在选取之内，以便后面整体替换
              editor.selection.createRangeByElem($linkelem);
              editor.selection.restoreSelection();
              // 显示 panel
              this._createPanel($linkelem.text(), $linkelem.attr('href'));
          } else {
              // 当前选区不在链接里面
              if (editor.selection.isSelectionEmpty()) {
                  // 选区是空的，未选中内容
                  this._createPanel('', '');
              } else {
                  // 选中内容了
                  this._createPanel(editor.selection.getSelectionText(), '');
              }
          }
      },
  
      // 创建 panel
      _createPanel: function _createPanel(text, link) {
          var _this = this;
  
          // panel 中需要用到的id
          var inputLinkId = getRandom('input-link');
          var inputTextId = getRandom('input-text');
          var btnOkId = getRandom('btn-ok');
          var btnDelId = getRandom('btn-del');
  
          // 是否显示“删除链接”
          var delBtnDisplay = this._active ? 'inline-block' : 'none';
  
          // 初始化并显示 panel
          var panel = new Panel(this, {
              width: 300,
              // panel 中可包含多个 tab
              tabs: [{
                  // tab 的标题
                  title: '链接',
                  // 模板
                  tpl: '<div>\n                            <input id="' + inputTextId + '" type="text" class="block" value="' + text + '" placeholder="\u94FE\u63A5\u6587\u5B57"/></td>\n                            <input id="' + inputLinkId + '" type="text" class="block" value="' + link + '" placeholder="http://..."/></td>\n                            <div class="w-e-button-container">\n                                <button id="' + btnOkId + '" class="right">\u63D2\u5165</button>\n                                <button id="' + btnDelId + '" class="gray right" style="display:' + delBtnDisplay + '">\u5220\u9664\u94FE\u63A5</button>\n                            </div>\n                        </div>',
                  // 事件绑定
                  events: [
                  // 插入链接
                  {
                      selector: '#' + btnOkId,
                      type: 'click',
                      fn: function fn() {
                          // 执行插入链接
                          var $link = $('#' + inputLinkId);
                          var $text = $('#' + inputTextId);
                          var link = $link.val();
                          var text = $text.val();
                          _this._insertLink(text, link);
  
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  },
                  // 删除链接
                  {
                      selector: '#' + btnDelId,
                      type: 'click',
                      fn: function fn() {
                          // 执行删除链接
                          _this._delLink();
  
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  }]
              } // tab end
              ] // tabs end
          });
  
          // 显示 panel
          panel.show();
  
          // 记录属性
          this.panel = panel;
      },
  
      // 删除当前链接
      _delLink: function _delLink() {
          if (!this._active) {
              return;
          }
          var editor = this.editor;
          var $selectionELem = editor.selection.getSelectionContainerElem();
          if (!$selectionELem) {
              return;
          }
          var selectionText = editor.selection.getSelectionText();
          editor.cmd.do('insertHTML', '<span>' + selectionText + '</span>');
      },
  
      // 插入链接
      _insertLink: function _insertLink(text, link) {
          if (!text || !link) {
              return;
          }
          var editor = this.editor;
          editor.cmd.do('insertHTML', '<a href="' + link + '" target="_blank">' + text + '</a>');
      },
  
      // 试图改变 active 状态
      tryChangeActive: function tryChangeActive(e) {
          var editor = this.editor;
          var $elem = this.$elem;
          var $selectionELem = editor.selection.getSelectionContainerElem();
          if (!$selectionELem) {
              return;
          }
          if ($selectionELem.getNodeName() === 'A') {
              this._active = true;
              $elem.addClass('w-e-active');
          } else {
              this._active = false;
              $elem.removeClass('w-e-active');
          }
      }
  };
  
  /*
      italic-menu
  */
  // 构造函数
  function Italic(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu">\n            <i class="w-e-icon-italic"><i/>\n        </div>');
      this.type = 'click';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Italic.prototype = {
      constructor: Italic,
  
      // 点击事件
      onClick: function onClick(e) {
          // 点击菜单将触发这里
  
          var editor = this.editor;
          var isSeleEmpty = editor.selection.isSelectionEmpty();
  
          if (isSeleEmpty) {
              // 选区是空的，插入并选中一个“空白”
              editor.selection.createEmptyRange();
          }
  
          // 执行 italic 命令
          editor.cmd.do('italic');
  
          if (isSeleEmpty) {
              // 需要将选取折叠起来
              editor.selection.collapseRange();
              editor.selection.restoreSelection();
          }
      },
  
      // 试图改变 active 状态
      tryChangeActive: function tryChangeActive(e) {
          var editor = this.editor;
          var $elem = this.$elem;
          if (editor.cmd.queryCommandState('italic')) {
              this._active = true;
              $elem.addClass('w-e-active');
          } else {
              this._active = false;
              $elem.removeClass('w-e-active');
          }
      }
  };
  
  /*
      redo-menu
  */
  // 构造函数
  function Redo(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu">\n            <i class="w-e-icon-redo"><i/>\n        </div>');
      this.type = 'click';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Redo.prototype = {
      constructor: Redo,
  
      // 点击事件
      onClick: function onClick(e) {
          // 点击菜单将触发这里
  
          var editor = this.editor;
  
          // 执行 redo 命令
          editor.cmd.do('redo');
      }
  };
  
  /*
      strikeThrough-menu
  */
  // 构造函数
  function StrikeThrough(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu">\n            <i class="w-e-icon-strikethrough"><i/>\n        </div>');
      this.type = 'click';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  StrikeThrough.prototype = {
      constructor: StrikeThrough,
  
      // 点击事件
      onClick: function onClick(e) {
          // 点击菜单将触发这里
  
          var editor = this.editor;
          var isSeleEmpty = editor.selection.isSelectionEmpty();
  
          if (isSeleEmpty) {
              // 选区是空的，插入并选中一个“空白”
              editor.selection.createEmptyRange();
          }
  
          // 执行 strikeThrough 命令
          editor.cmd.do('strikeThrough');
  
          if (isSeleEmpty) {
              // 需要将选取折叠起来
              editor.selection.collapseRange();
              editor.selection.restoreSelection();
          }
      },
  
      // 试图改变 active 状态
      tryChangeActive: function tryChangeActive(e) {
          var editor = this.editor;
          var $elem = this.$elem;
          if (editor.cmd.queryCommandState('strikeThrough')) {
              this._active = true;
              $elem.addClass('w-e-active');
          } else {
              this._active = false;
              $elem.removeClass('w-e-active');
          }
      }
  };
  
  /*
      underline-menu
  */
  // 构造函数
  function Underline(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu">\n            <i class="w-e-icon-underline"><i/>\n        </div>');
      this.type = 'click';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Underline.prototype = {
      constructor: Underline,
  
      // 点击事件
      onClick: function onClick(e) {
          // 点击菜单将触发这里
  
          var editor = this.editor;
          var isSeleEmpty = editor.selection.isSelectionEmpty();
  
          if (isSeleEmpty) {
              // 选区是空的，插入并选中一个“空白”
              editor.selection.createEmptyRange();
          }
  
          // 执行 underline 命令
          editor.cmd.do('underline');
  
          if (isSeleEmpty) {
              // 需要将选取折叠起来
              editor.selection.collapseRange();
              editor.selection.restoreSelection();
          }
      },
  
      // 试图改变 active 状态
      tryChangeActive: function tryChangeActive(e) {
          var editor = this.editor;
          var $elem = this.$elem;
          if (editor.cmd.queryCommandState('underline')) {
              this._active = true;
              $elem.addClass('w-e-active');
          } else {
              this._active = false;
              $elem.removeClass('w-e-active');
          }
      }
  };
  
  /*
      undo-menu
  */
  // 构造函数
  function Undo(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu">\n            <i class="w-e-icon-undo"><i/>\n        </div>');
      this.type = 'click';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Undo.prototype = {
      constructor: Undo,
  
      // 点击事件
      onClick: function onClick(e) {
          // 点击菜单将触发这里
  
          var editor = this.editor;
  
          // 执行 undo 命令
          editor.cmd.do('undo');
      }
  };
  
  /*
      menu - list
  */
  // 构造函数
  function List(editor) {
      var _this = this;
  
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu"><i class="w-e-icon-list2"><i/></div>');
      this.type = 'droplist';
  
      // 当前是否 active 状态
      this._active = false;
  
      // 初始化 droplist
      this.droplist = new DropList(this, {
          width: 120,
          $title: $('<p>设置列表</p>'),
          type: 'list', // droplist 以列表形式展示
          list: [{ $elem: $('<span><i class="w-e-icon-list-numbered"></i> 有序列表</span>'), value: 'insertOrderedList' }, { $elem: $('<span><i class="w-e-icon-list2"></i> 无序列表</span>'), value: 'insertUnorderedList' }],
          onClick: function onClick(value) {
              // 注意 this 是指向当前的 List 对象
              _this._command(value);
          }
      });
  }
  
  // 原型
  List.prototype = {
      constructor: List,
  
      // 执行命令
      _command: function _command(value) {
          var editor = this.editor;
          var $textElem = editor.$textElem;
          editor.selection.restoreSelection();
          if (editor.cmd.queryCommandState(value)) {
              return;
          }
          editor.cmd.do(value);
  
          // 验证列表是否被包裹在 <p> 之内
          var $selectionElem = editor.selection.getSelectionContainerElem();
          if ($selectionElem.getNodeName() === 'LI') {
              $selectionElem = $selectionElem.parent();
          }
          if (/^ol|ul$/i.test($selectionElem.getNodeName()) === false) {
              return;
          }
          if ($selectionElem.equal($textElem)) {
              // 证明是顶级标签，没有被 <p> 包裹
              return;
          }
          var $parent = $selectionElem.parent();
          if ($parent.equal($textElem)) {
              // $parent 是顶级标签，不能删除
              return;
          }
  
          $selectionElem.insertAfter($parent);
          $parent.remove();
      },
  
      // 试图改变 active 状态
      tryChangeActive: function tryChangeActive(e) {
          var editor = this.editor;
          var $elem = this.$elem;
          if (editor.cmd.queryCommandState('insertUnOrderedList') || editor.cmd.queryCommandState('insertOrderedList')) {
              this._active = true;
              $elem.addClass('w-e-active');
          } else {
              this._active = false;
              $elem.removeClass('w-e-active');
          }
      }
  };
  
  /*
      menu - justify
  */
  // 构造函数
  function Justify(editor) {
      var _this = this;
  
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu"><i class="w-e-icon-paragraph-left"><i/></div>');
      this.type = 'droplist';
  
      // 当前是否 active 状态
      this._active = false;
  
      // 初始化 droplist
      this.droplist = new DropList(this, {
          width: 100,
          $title: $('<p>对齐方式</p>'),
          type: 'list', // droplist 以列表形式展示
          list: [{ $elem: $('<span><i class="w-e-icon-paragraph-left"></i> 靠左</span>'), value: 'justifyLeft' }, { $elem: $('<span><i class="w-e-icon-paragraph-center"></i> 居中</span>'), value: 'justifyCenter' }, { $elem: $('<span><i class="w-e-icon-paragraph-right"></i> 靠右</span>'), value: 'justifyRight' }],
          onClick: function onClick(value) {
              // 注意 this 是指向当前的 List 对象
              _this._command(value);
          }
      });
  }
  
  // 原型
  Justify.prototype = {
      constructor: Justify,
  
      // 执行命令
      _command: function _command(value) {
          var editor = this.editor;
          editor.cmd.do(value);
      }
  };
  
  /*
      menu - Forecolor
  */
  // 构造函数
  function ForeColor(editor) {
      var _this = this;
  
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu"><i class="w-e-icon-pencil2"><i/></div>');
      this.type = 'droplist';
  
      // 当前是否 active 状态
      this._active = false;
  
      // 初始化 droplist
      this.droplist = new DropList(this, {
          width: 120,
          $title: $('<p>文字颜色</p>'),
          type: 'inline-block', // droplist 内容以 block 形式展示
          list: [{ $elem: $('<i style="color:#000000;" class="w-e-icon-pencil2"></i>'), value: '#000000' }, { $elem: $('<i style="color:#eeece0;" class="w-e-icon-pencil2"></i>'), value: '#eeece0' }, { $elem: $('<i style="color:#1c487f;" class="w-e-icon-pencil2"></i>'), value: '#1c487f' }, { $elem: $('<i style="color:#4d80bf;" class="w-e-icon-pencil2"></i>'), value: '#4d80bf' }, { $elem: $('<i style="color:#c24f4a;" class="w-e-icon-pencil2"></i>'), value: '#c24f4a' }, { $elem: $('<i style="color:#8baa4a;" class="w-e-icon-pencil2"></i>'), value: '#8baa4a' }, { $elem: $('<i style="color:#7b5ba1;" class="w-e-icon-pencil2"></i>'), value: '#7b5ba1' }, { $elem: $('<i style="color:#46acc8;" class="w-e-icon-pencil2"></i>'), value: '#46acc8' }, { $elem: $('<i style="color:#f9963b;" class="w-e-icon-pencil2"></i>'), value: '#f9963b' }, { $elem: $('<i style="color:#ffffff;" class="w-e-icon-pencil2"></i>'), value: '#ffffff' }],
          onClick: function onClick(value) {
              // 注意 this 是指向当前的 ForeColor 对象
              _this._command(value);
          }
      });
  }
  
  // 原型
  ForeColor.prototype = {
      constructor: ForeColor,
  
      // 执行命令
      _command: function _command(value) {
          var editor = this.editor;
          editor.cmd.do('foreColor', value);
      }
  };
  
  /*
      menu - BackColor
  */
  // 构造函数
  function BackColor(editor) {
      var _this = this;
  
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu"><i class="w-e-icon-paint-brush"><i/></div>');
      this.type = 'droplist';
  
      // 当前是否 active 状态
      this._active = false;
  
      // 初始化 droplist
      this.droplist = new DropList(this, {
          width: 120,
          $title: $('<p>背景色</p>'),
          type: 'inline-block', // droplist 内容以 block 形式展示
          list: [{ $elem: $('<i style="color:#000000;" class="w-e-icon-paint-brush"></i>'), value: '#000000' }, { $elem: $('<i style="color:#eeece0;" class="w-e-icon-paint-brush"></i>'), value: '#eeece0' }, { $elem: $('<i style="color:#1c487f;" class="w-e-icon-paint-brush"></i>'), value: '#1c487f' }, { $elem: $('<i style="color:#4d80bf;" class="w-e-icon-paint-brush"></i>'), value: '#4d80bf' }, { $elem: $('<i style="color:#c24f4a;" class="w-e-icon-paint-brush"></i>'), value: '#c24f4a' }, { $elem: $('<i style="color:#8baa4a;" class="w-e-icon-paint-brush"></i>'), value: '#8baa4a' }, { $elem: $('<i style="color:#7b5ba1;" class="w-e-icon-paint-brush"></i>'), value: '#7b5ba1' }, { $elem: $('<i style="color:#46acc8;" class="w-e-icon-paint-brush"></i>'), value: '#46acc8' }, { $elem: $('<i style="color:#f9963b;" class="w-e-icon-paint-brush"></i>'), value: '#f9963b' }, { $elem: $('<i style="color:#ffffff;" class="w-e-icon-paint-brush"></i>'), value: '#ffffff' }],
          onClick: function onClick(value) {
              // 注意 this 是指向当前的 BackColor 对象
              _this._command(value);
          }
      });
  }
  
  // 原型
  BackColor.prototype = {
      constructor: BackColor,
  
      // 执行命令
      _command: function _command(value) {
          var editor = this.editor;
          editor.cmd.do('backColor', value);
      }
  };
  
  /*
      menu - quote
  */
  // 构造函数
  function Quote(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu">\n            <i class="w-e-icon-quotes-left"><i/>\n        </div>');
      this.type = 'click';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Quote.prototype = {
      constructor: Quote,
  
      onClick: function onClick(e) {
          var editor = this.editor;
          if (!UA.isIE()) {
              editor.cmd.do('formatBlock', '<BLOCKQUOTE>');
              return;
          }
  
          // IE 中不支持 formatBlock <BLOCKQUOTE> ，要用其他方式兼容
  
          var $selectionElem = editor.selection.getSelectionContainerElem();
          var content = void 0,
              $targetELem = void 0;
          if ($selectionElem.getNodeName() === 'P') {
              // 将 P 转换为 quote
              content = $selectionElem.text();
              $targetELem = $('<blockquote>' + content + '</blockquote>');
              $targetELem.insertAfter($selectionElem);
              $selectionElem.remove();
              return;
          }
          if ($selectionElem.getNodeName() === 'BLOCKQUOTE') {
              // 撤销 quote
              content = $selectionElem.text();
              $targetELem = $('<p>' + content + '</p>');
              $targetELem.insertAfter($selectionElem);
              $selectionElem.remove();
          }
      },
  
      tryChangeActive: function tryChangeActive(e) {
          var editor = this.editor;
          var $elem = this.$elem;
          var reg = /^BLOCKQUOTE$/i;
          var cmdValue = editor.cmd.queryCommandValue('formatBlock');
          if (reg.test(cmdValue)) {
              this._active = true;
              $elem.addClass('w-e-active');
          } else {
              this._active = false;
              $elem.removeClass('w-e-active');
          }
      }
  };
  
  /*
      menu - code
  */
  // 构造函数
  function Code(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu">\n            <i class="w-e-icon-terminal"><i/>\n        </div>');
      this.type = 'panel';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Code.prototype = {
      constructor: Code,
  
      onClick: function onClick(e) {
          var editor = this.editor;
          var $startElem = editor.selection.getSelectionStartElem();
          var $endElem = editor.selection.getSelectionEndElem();
          var isSeleEmpty = editor.selection.isSelectionEmpty();
          var selectionText = editor.selection.getSelectionText();
          var $code = void 0;
  
          if (!$startElem.equal($endElem)) {
              // 跨元素选择，不做处理
              editor.selection.restoreSelection();
              return;
          }
          if (!isSeleEmpty) {
              // 选取不是空，用 <code> 包裹即可
              $code = $('<code>' + selectionText + '</code>');
              editor.cmd.do('insertElem', $code);
              editor.selection.createRangeByElem($code, false);
              editor.selection.restoreSelection();
              return;
          }
  
          // 选取是空，且没有夸元素选择，则插入 <pre><code></code></prev>
          if (this._active) {
              // 选中状态，将编辑内容
              this._createPanel($startElem.html());
          } else {
              // 未选中状态，将创建内容
              this._createPanel();
          }
      },
  
      _createPanel: function _createPanel(value) {
          var _this = this;
  
          // value - 要编辑的内容
          value = value || '';
          var type = !value ? 'new' : 'edit';
          var textId = getRandom('texxt');
          var btnId = getRandom('btn');
  
          var panel = new Panel(this, {
              width: 500,
              // 一个 Panel 包含多个 tab
              tabs: [{
                  // 标题
                  title: '插入代码',
                  // 模板
                  tpl: '<div>\n                        <textarea id="' + textId + '" style="height:145px;;">' + value + '</textarea>\n                        <div class="w-e-button-container">\n                            <button id="' + btnId + '" class="right">\u63D2\u5165</button>\n                        </div>\n                    <div>',
                  // 事件绑定
                  events: [
                  // 插入代码
                  {
                      selector: '#' + btnId,
                      type: 'click',
                      fn: function fn() {
                          var $text = $('#' + textId);
                          var text = $text.val() || $text.html();
                          text = replaceHtmlSymbol(text);
                          if (type === 'new') {
                              // 新插入
                              _this._insertCode(text);
                          } else {
                              // 编辑更新
                              _this._updateCode(text);
                          }
  
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  }]
              } // first tab end
              ] // tabs end
          }); // new Panel end
  
          // 显示 panel
          panel.show();
  
          // 记录属性
          this.panel = panel;
      },
  
      // 插入代码
      _insertCode: function _insertCode(value) {
          var editor = this.editor;
          editor.cmd.do('insertHTML', '<pre><code>' + value + '</code></pre><p><br></p>');
      },
  
      // 更新代码
      _updateCode: function _updateCode(value) {
          var editor = this.editor;
          var $selectionELem = editor.selection.getSelectionContainerElem();
          if (!$selectionELem) {
              return;
          }
          $selectionELem.html(value);
          editor.selection.restoreSelection();
      },
  
      // 试图改变 active 状态
      tryChangeActive: function tryChangeActive(e) {
          var editor = this.editor;
          var $elem = this.$elem;
          var $selectionELem = editor.selection.getSelectionContainerElem();
          if (!$selectionELem) {
              return;
          }
          var $parentElem = $selectionELem.parent();
          if ($selectionELem.getNodeName() === 'CODE' && $parentElem.getNodeName() === 'PRE') {
              this._active = true;
              $elem.addClass('w-e-active');
          } else {
              this._active = false;
              $elem.removeClass('w-e-active');
          }
      }
  };
  
  /*
      menu - emoticon
  */
  // 构造函数
  function Emoticon(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu">\n            <i class="w-e-icon-happy"><i/>\n        </div>');
      this.type = 'panel';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Emoticon.prototype = {
      constructor: Emoticon,
  
      onClick: function onClick() {
          this._createPanel();
      },
  
      _createPanel: function _createPanel() {
          var _this = this;
  
          // 拼接表情字符串
          var faceHtml = '';
          var faceStr = '😀 😃 😄 😁 😆 😅 😂  😊 😇 🙂 🙃 😉 😌 😍 😘 😗 😙 😚 😋 😜 😝 😛 🤑 🤗 🤓 😎 😏 😒 😞 😔 😟 😕 🙁  😣 😖 😫 😩 😤 😠 😡 😶 😐 😑 😯 😦 😧 😮 😲 😵 😳 😱 😨 😰 😢 😥 😭 😓 😪 😴 🙄 🤔 😬 🤐';
          faceStr.split(/\s/).forEach(function (item) {
              if (item) {
                  faceHtml += '<span class="w-e-item">' + item + '</span>';
              }
          });
  
          var handHtml = '';
          var handStr = '🙌 👏 👋 👍 👎 👊 ✊ ️👌 ✋ 👐 💪 🙏 ️👆 👇 👈 👉 🖕 🖐 🤘 🖖';
          handStr.split(/\s/).forEach(function (item) {
              if (item) {
                  handHtml += '<span class="w-e-item">' + item + '</span>';
              }
          });
  
          var panel = new Panel(this, {
              width: 300,
              height: 200,
              // 一个 Panel 包含多个 tab
              tabs: [{
                  // 标题
                  title: '表情',
                  // 模板
                  tpl: '<div class="w-e-emoticon-container">' + faceHtml + '</div>',
                  // 事件绑定
                  events: [{
                      selector: 'span.w-e-item',
                      type: 'click',
                      fn: function fn(e) {
                          var target = e.target;
                          _this._insert(target.innerHTML);
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  }]
              }, // first tab end
              {
                  // 标题
                  title: '手势',
                  // 模板
                  tpl: '<div class="w-e-emoticon-container">' + handHtml + '</div>',
                  // 事件绑定
                  events: [{
                      selector: 'span.w-e-item',
                      type: 'click',
                      fn: function fn(e) {
                          var target = e.target;
                          _this._insert(target.innerHTML);
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  }]
              } // second tab end
              ] // tabs end
          });
  
          // 显示 panel
          panel.show();
  
          // 记录属性
          this.panel = panel;
      },
  
      // 插入表情
      _insert: function _insert(emoji) {
          var editor = this.editor;
          editor.cmd.do('insertHTML', '<span>' + emoji + '</span>');
      }
  };
  
  /*
      menu - table
  */
  // 构造函数
  function Table(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu"><i class="w-e-icon-table2"><i/></div>');
      this.type = 'panel';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Table.prototype = {
      constructor: Table,
  
      onClick: function onClick() {
          if (this._active) {
              // 编辑现有表格
              this._createEditPanel();
          } else {
              // 插入新表格
              this._createInsertPanel();
          }
      },
  
      // 创建插入新表格的 panel
      _createInsertPanel: function _createInsertPanel() {
          var _this = this;
  
          // 用到的 id
          var btnInsertId = getRandom('btn');
          var textRowNum = getRandom('row');
          var textColNum = getRandom('col');
  
          var panel = new Panel(this, {
              width: 250,
              // panel 包含多个 tab
              tabs: [{
                  // 标题
                  title: '插入表格',
                  // 模板
                  tpl: '<div>\n                        <p style="text-align:left; padding:5px 0;">\n                            \u521B\u5EFA\n                            <input id="' + textRowNum + '" type="text" value="5" style="width:40px;text-align:center;"/>\n                            \u884C\n                            <input id="' + textColNum + '" type="text" value="5" style="width:40px;text-align:center;"/>\n                            \u5217\u7684\u8868\u683C\n                        </p>\n                        <div class="w-e-button-container">\n                            <button id="' + btnInsertId + '" class="right">\u63D2\u5165</button>\n                        </div>\n                    </div>',
                  // 事件绑定
                  events: [{
                      // 点击按钮，插入表格
                      selector: '#' + btnInsertId,
                      type: 'click',
                      fn: function fn() {
                          var rowNum = parseInt($('#' + textRowNum).val());
                          var colNum = parseInt($('#' + textColNum).val());
  
                          if (rowNum && colNum && rowNum > 0 && colNum > 0) {
                              // form 数据有效
                              _this._insert(rowNum, colNum);
                          }
  
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  }]
              } // first tab end
              ] // tabs end
          }); // panel end
  
          // 展示 panel
          panel.show();
  
          // 记录属性
          this.panel = panel;
      },
  
      // 插入表格
      _insert: function _insert(rowNum, colNum) {
          // 拼接 table 模板
          var r = void 0,
              c = void 0;
          var html = '<table border="0" width="100%" cellpadding="0" cellspacing="0">';
          for (r = 0; r < rowNum; r++) {
              html += '<tr>';
              if (r === 0) {
                  for (c = 0; c < colNum; c++) {
                      html += '<th>&nbsp;</th>';
                  }
              } else {
                  for (c = 0; c < colNum; c++) {
                      html += '<td>&nbsp;</td>';
                  }
              }
              html += '</tr>';
          }
          html += '</table><p><br></p>';
  
          // 执行命令
          var editor = this.editor;
          editor.cmd.do('insertHTML', html);
  
          // 防止 firefox 下出现 resize 的控制点
          editor.cmd.do('enableObjectResizing', false);
          editor.cmd.do('enableInlineTableEditing', false);
      },
  
      // 创建编辑表格的 panel
      _createEditPanel: function _createEditPanel() {
          var _this2 = this;
  
          // 可用的 id
          var addRowBtnId = getRandom('add-row');
          var addColBtnId = getRandom('add-col');
          var delRowBtnId = getRandom('del-row');
          var delColBtnId = getRandom('del-col');
          var delTableBtnId = getRandom('del-table');
  
          // 创建 panel 对象
          var panel = new Panel(this, {
              width: 320,
              // panel 包含多个 tab
              tabs: [{
                  // 标题
                  title: '编辑表格',
                  // 模板
                  tpl: '<div>\n                        <div class="w-e-button-container" style="border-bottom:1px solid #f1f1f1;padding-bottom:5px;margin-bottom:5px;">\n                            <button id="' + addRowBtnId + '" class="left">\u589E\u52A0\u884C</button>\n                            <button id="' + delRowBtnId + '" class="red left">\u5220\u9664\u884C</button>\n                            <button id="' + addColBtnId + '" class="left">\u589E\u52A0\u5217</button>\n                            <button id="' + delColBtnId + '" class="red left">\u5220\u9664\u5217</button>\n                        </div>\n                        <div class="w-e-button-container">\n                            <button id="' + delTableBtnId + '" class="gray left">\u5220\u9664\u8868\u683C</button>\n                        </dv>\n                    </div>',
                  // 事件绑定
                  events: [{
                      // 增加行
                      selector: '#' + addRowBtnId,
                      type: 'click',
                      fn: function fn() {
                          _this2._addRow();
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  }, {
                      // 增加列
                      selector: '#' + addColBtnId,
                      type: 'click',
                      fn: function fn() {
                          _this2._addCol();
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  }, {
                      // 删除行
                      selector: '#' + delRowBtnId,
                      type: 'click',
                      fn: function fn() {
                          _this2._delRow();
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  }, {
                      // 删除列
                      selector: '#' + delColBtnId,
                      type: 'click',
                      fn: function fn() {
                          _this2._delCol();
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  }, {
                      // 删除表格
                      selector: '#' + delTableBtnId,
                      type: 'click',
                      fn: function fn() {
                          _this2._delTable();
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  }]
              }]
          });
          // 显示 panel
          panel.show();
      },
  
      // 获取选中的单元格的位置信息
      _getLocationData: function _getLocationData() {
          var result = {};
          var editor = this.editor;
          var $selectionELem = editor.selection.getSelectionContainerElem();
          if (!$selectionELem) {
              return;
          }
          var nodeName = $selectionELem.getNodeName();
          if (nodeName !== 'TD' && nodeName !== 'TH') {
              return;
          }
  
          // 获取 td index
          var $tr = $selectionELem.parent();
          var $tds = $tr.children();
          var tdLength = $tds.length;
          $tds.forEach(function (td, index) {
              if (td === $selectionELem[0]) {
                  // 记录并跳出循环
                  result.td = {
                      index: index,
                      elem: td,
                      length: tdLength
                  };
                  return false;
              }
          });
  
          // 获取 tr index
          var $tbody = $tr.parent();
          var $trs = $tbody.children();
          var trLength = $trs.length;
          $trs.forEach(function (tr, index) {
              if (tr === $tr[0]) {
                  // 记录并跳出循环
                  result.tr = {
                      index: index,
                      elem: tr,
                      length: trLength
                  };
                  return false;
              }
          });
  
          // 返回结果
          return result;
      },
  
      // 增加行
      _addRow: function _addRow() {
          // 获取当前单元格的位置信息
          var locationData = this._getLocationData();
          if (!locationData) {
              return;
          }
          var trData = locationData.tr;
          var $currentTr = $(trData.elem);
          var tdData = locationData.td;
          var tdLength = tdData.length;
  
          // 拼接即将插入的字符串
          var newTr = document.createElement('tr');
          var tpl = '',
              i = void 0;
          for (i = 0; i < tdLength; i++) {
              tpl += '<td>&nbsp;</td>';
          }
          newTr.innerHTML = tpl;
          // 插入
          $(newTr).insertAfter($currentTr);
      },
  
      // 增加列
      _addCol: function _addCol() {
          // 获取当前单元格的位置信息
          var locationData = this._getLocationData();
          if (!locationData) {
              return;
          }
          var trData = locationData.tr;
          var tdData = locationData.td;
          var tdIndex = tdData.index;
          var $currentTr = $(trData.elem);
          var $trParent = $currentTr.parent();
          var $trs = $trParent.children();
  
          // 遍历所有行
          $trs.forEach(function (tr) {
              var $tr = $(tr);
              var $tds = $tr.children();
              var $currentTd = $tds.get(tdIndex);
              var name = $currentTd.getNodeName().toLowerCase();
  
              // new 一个 td，并插入
              var newTd = document.createElement(name);
              $(newTd).insertAfter($currentTd);
          });
      },
  
      // 删除行
      _delRow: function _delRow() {
          // 获取当前单元格的位置信息
          var locationData = this._getLocationData();
          if (!locationData) {
              return;
          }
          var trData = locationData.tr;
          var $currentTr = $(trData.elem);
          $currentTr.remove();
      },
  
      // 删除列
      _delCol: function _delCol() {
          // 获取当前单元格的位置信息
          var locationData = this._getLocationData();
          if (!locationData) {
              return;
          }
          var trData = locationData.tr;
          var tdData = locationData.td;
          var tdIndex = tdData.index;
          var $currentTr = $(trData.elem);
          var $trParent = $currentTr.parent();
          var $trs = $trParent.children();
  
          // 遍历所有行
          $trs.forEach(function (tr) {
              var $tr = $(tr);
              var $tds = $tr.children();
              var $currentTd = $tds.get(tdIndex);
              // 删除
              $currentTd.remove();
          });
      },
  
      // 删除表格
      _delTable: function _delTable() {
          var editor = this.editor;
          var $selectionELem = editor.selection.getSelectionContainerElem();
          if (!$selectionELem) {
              return;
          }
          var $table = $selectionELem.parentUntil('table');
          if (!$table) {
              return;
          }
          $table.remove();
      },
  
      // 试图改变 active 状态
      tryChangeActive: function tryChangeActive(e) {
          var editor = this.editor;
          var $elem = this.$elem;
          var $selectionELem = editor.selection.getSelectionContainerElem();
          if (!$selectionELem) {
              return;
          }
          var nodeName = $selectionELem.getNodeName();
          if (nodeName === 'TD' || nodeName === 'TH') {
              this._active = true;
              $elem.addClass('w-e-active');
          } else {
              this._active = false;
              $elem.removeClass('w-e-active');
          }
      }
  };
  
  /*
      menu - video
  */
  // 构造函数
  function Video(editor) {
      this.editor = editor;
      this.$elem = $('<div class="w-e-menu"><i class="w-e-icon-play"><i/></div>');
      this.type = 'panel';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Video.prototype = {
      constructor: Video,
  
      onClick: function onClick() {
          this._createPanel();
      },
  
      _createPanel: function _createPanel() {
          var _this = this;
  
          // 创建 id
          var textValId = getRandom('text-val');
          var btnId = getRandom('btn');
  
          // 创建 panel
          var panel = new Panel(this, {
              width: 350,
              // 一个 panel 多个 tab
              tabs: [{
                  // 标题
                  title: '插入视频',
                  // 模板
                  tpl: '<div>\n                        <input id="' + textValId + '" type="text" class="block" placeholder="\u683C\u5F0F\u5982\uFF1A<iframe src=... ></iframe>"/>\n                        <div class="w-e-button-container">\n                            <button id="' + btnId + '" class="right">\u63D2\u5165</button>\n                        </div>\n                    </div>',
                  // 事件绑定
                  events: [{
                      selector: '#' + btnId,
                      type: 'click',
                      fn: function fn() {
                          var $text = $('#' + textValId);
                          var val = $text.val().trim();
  
                          // 测试用视频地址
                          // <iframe height=498 width=510 src='http://player.youku.com/embed/XMjcwMzc3MzM3Mg==' frameborder=0 'allowfullscreen'></iframe>
  
                          if (val) {
                              // 插入视频
                              _this._insert(val);
                          }
  
                          // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                          return true;
                      }
                  }]
              } // first tab end
              ] // tabs end
          }); // panel end
  
          // 显示 panel
          panel.show();
  
          // 记录属性
          this.panel = panel;
      },
  
      // 插入视频
      _insert: function _insert(val) {
          var editor = this.editor;
          editor.cmd.do('insertHTML', val + '<p><br></p>');
      }
  };
  
  /*
      menu - img
  */
  // 构造函数
  function Image(editor) {
      this.editor = editor;
      var imgMenuId = getRandom('w-e-img');
      this.$elem = $('<div class="w-e-menu" id="' + imgMenuId + '"><i class="w-e-icon-image"><i/></div>');
      editor.imgMenuId = imgMenuId;
      this.type = 'panel';
  
      // 当前是否 active 状态
      this._active = false;
  }
  
  // 原型
  Image.prototype = {
      constructor: Image,
  
      onClick: function onClick() {
          var editor = this.editor;
          var config = editor.config;
          if (config.qiniu) {
              return;
          }
          if (this._active) {
              this._createEditPanel();
          } else {
              this._createInsertPanel();
          }
      },
  
      _createEditPanel: function _createEditPanel() {
          var editor = this.editor;
  
          // id
          var width30 = getRandom('width-30');
          var width50 = getRandom('width-50');
          var width100 = getRandom('width-100');
          var delBtn = getRandom('del-btn');
  
          // tab 配置
          var tabsConfig = [{
              title: '编辑图片',
              tpl: '<div>\n                    <div class="w-e-button-container" style="border-bottom:1px solid #f1f1f1;padding-bottom:5px;margin-bottom:5px;">\n                        <span style="float:left;font-size:14px;margin:4px 5px 0 5px;color:#333;">\u6700\u5927\u5BBD\u5EA6\uFF1A</span>\n                        <button id="' + width30 + '" class="left">30%</button>\n                        <button id="' + width50 + '" class="left">50%</button>\n                        <button id="' + width100 + '" class="left">100%</button>\n                    </div>\n                    <div class="w-e-button-container">\n                        <button id="' + delBtn + '" class="gray left">\u5220\u9664\u56FE\u7247</button>\n                    </dv>\n                </div>',
              events: [{
                  selector: '#' + width30,
                  type: 'click',
                  fn: function fn() {
                      var $img = editor._selectedImg;
                      if ($img) {
                          $img.css('max-width', '30%');
                      }
                      // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                      return true;
                  }
              }, {
                  selector: '#' + width50,
                  type: 'click',
                  fn: function fn() {
                      var $img = editor._selectedImg;
                      if ($img) {
                          $img.css('max-width', '50%');
                      }
                      // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                      return true;
                  }
              }, {
                  selector: '#' + width100,
                  type: 'click',
                  fn: function fn() {
                      var $img = editor._selectedImg;
                      if ($img) {
                          $img.css('max-width', '100%');
                      }
                      // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                      return true;
                  }
              }, {
                  selector: '#' + delBtn,
                  type: 'click',
                  fn: function fn() {
                      var $img = editor._selectedImg;
                      if ($img) {
                          $img.remove();
                      }
                      // 返回 true，表示该事件执行完之后，panel 要关闭。否则 panel 不会关闭
                      return true;
                  }
              }]
          }];
  
          // 创建 panel 并显示
          var panel = new Panel(this, {
              width: 300,
              tabs: tabsConfig
          });
          panel.show();
  
          // 记录属性
          this.panel = panel;
      },
  
      _createInsertPanel: function _createInsertPanel() {
          var editor = this.editor;
          var uploadImg = editor.uploadImg;
          var config = editor.config;
  
          // id
          var upTriggerId = getRandom('up-trigger');
          var upFileId = getRandom('up-file');
          var linkUrlId = getRandom('link-url');
          var linkBtnId = getRandom('link-btn');
  
          // tabs 的配置
          var tabsConfig = [{
              title: '上传图片',
              tpl: '<div class="w-e-up-img-container">\n                    <div id="' + upTriggerId + '" class="w-e-up-btn">\n                        <i class="w-e-icon-upload2"></i>\n                    </div>\n                    <div style="display:none;">\n                        <input id="' + upFileId + '" type="file" multiple="multiple" accept="image/jpg,image/jpeg,image/png,image/gif,image/bmp"/>\n                    </div>\n                </div>',
              events: [{
                  // 触发选择图片
                  selector: '#' + upTriggerId,
                  type: 'click',
                  fn: function fn() {
                      var $file = $('#' + upFileId);
                      var fileElem = $file[0];
                      if (fileElem) {
                          fileElem.click();
                      } else {
                          // 返回 true 可关闭 panel
                          return true;
                      }
                  }
              }, {
                  // 选择图片完毕
                  selector: '#' + upFileId,
                  type: 'change',
                  fn: function fn() {
                      var $file = $('#' + upFileId);
                      var fileElem = $file[0];
                      if (!fileElem) {
                          // 返回 true 可关闭 panel
                          return true;
                      }
  
                      // 获取选中的 file 对象列表
                      var fileList = fileElem.files;
                      if (fileList.length) {
                          uploadImg.uploadImg(fileList);
                      }
  
                      // 返回 true 可关闭 panel
                      return true;
                  }
              }]
          }, // first tab end
          {
              title: '网络图片',
              tpl: '<div>\n                    <input id="' + linkUrlId + '" type="text" class="block" placeholder="\u56FE\u7247\u94FE\u63A5"/></td>\n                    <div class="w-e-button-container">\n                        <button id="' + linkBtnId + '" class="right">\u63D2\u5165</button>\n                    </div>\n                </div>',
              events: [{
                  selector: '#' + linkBtnId,
                  type: 'click',
                  fn: function fn() {
                      var $linkUrl = $('#' + linkUrlId);
                      var url = $linkUrl.val().trim();
  
                      if (url) {
                          uploadImg.insertLinkImg(url);
                      }
  
                      // 返回 true 表示函数执行结束之后关闭 panel
                      return true;
                  }
              }]
          } // second tab end
          ]; // tabs end
  
          // 判断 tabs 的显示
          var tabsConfigResult = [];
          if ((config.uploadImgShowBase64 || config.uploadImgServer || config.customUploadImg) && window.FileReader) {
              // 显示“上传图片”
              tabsConfigResult.push(tabsConfig[0]);
          }
          if (config.showLinkImg) {
              // 显示“网络图片”
              tabsConfigResult.push(tabsConfig[1]);
          }
  
          // 创建 panel 并显示
          var panel = new Panel(this, {
              width: 300,
              tabs: tabsConfigResult
          });
          panel.show();
  
          // 记录属性
          this.panel = panel;
      },
  
      // 试图改变 active 状态
      tryChangeActive: function tryChangeActive(e) {
          var editor = this.editor;
          var $elem = this.$elem;
          if (editor._selectedImg) {
              this._active = true;
              $elem.addClass('w-e-active');
          } else {
              this._active = false;
              $elem.removeClass('w-e-active');
          }
      }
  };
  
  /*
      所有菜单的汇总
  */
  
  // 存储菜单的构造函数
  var MenuConstructors = {};
  
  MenuConstructors.bold = Bold;
  
  MenuConstructors.head = Head;
  
  MenuConstructors.link = Link;
  
  MenuConstructors.italic = Italic;
  
  MenuConstructors.redo = Redo;
  
  MenuConstructors.strikeThrough = StrikeThrough;
  
  MenuConstructors.underline = Underline;
  
  MenuConstructors.undo = Undo;
  
  MenuConstructors.list = List;
  
  MenuConstructors.justify = Justify;
  
  MenuConstructors.foreColor = ForeColor;
  
  MenuConstructors.backColor = BackColor;
  
  MenuConstructors.quote = Quote;
  
  MenuConstructors.code = Code;
  
  MenuConstructors.emoticon = Emoticon;
  
  MenuConstructors.table = Table;
  
  MenuConstructors.video = Video;
  
  MenuConstructors.image = Image;
  
  /*
      菜单集合
  */
  // 构造函数
  function Menus(editor) {
      this.editor = editor;
      this.menus = {};
  }
  
  // 修改原型
  Menus.prototype = {
      constructor: Menus,
  
      // 初始化菜单
      init: function init() {
          var _this = this;
  
          var editor = this.editor;
          var config = editor.config || {};
          var configMenus = config.menus || []; // 获取配置中的菜单
  
          // 根据配置信息，创建菜单
          configMenus.forEach(function (menuKey) {
              var MenuConstructor = MenuConstructors[menuKey];
              if (MenuConstructor && typeof MenuConstructor === 'function') {
                  // 创建单个菜单
                  _this.menus[menuKey] = new MenuConstructor(editor);
              }
          });
  
          // 添加到菜单栏
          this._addToToolbar();
  
          // 绑定事件
          this._bindEvent();
      },
  
      // 添加到菜单栏
      _addToToolbar: function _addToToolbar() {
          var editor = this.editor;
          var $toolbarElem = editor.$toolbarElem;
          var menus = this.menus;
          var config = editor.config;
          // config.zIndex 是配置的编辑区域的 z-index，菜单的 z-index 得在其基础上 +1
          var zIndex = config.zIndex + 1;
          objForEach(menus, function (key, menu) {
              var $elem = menu.$elem;
              if ($elem) {
                  // 设置 z-index
                  $elem.css('z-index', zIndex);
                  $toolbarElem.append($elem);
              }
          });
      },
  
      // 绑定菜单 click mouseenter 事件
      _bindEvent: function _bindEvent() {
          var menus = this.menus;
          var editor = this.editor;
          objForEach(menus, function (key, menu) {
              var type = menu.type;
              if (!type) {
                  return;
              }
              var $elem = menu.$elem;
              var droplist = menu.droplist;
              var panel = menu.panel;
  
              // 点击类型，例如 bold
              if (type === 'click' && menu.onClick) {
                  $elem.on('click', function (e) {
                      if (editor.selection.getRange() == null) {
                          return;
                      }
                      menu.onClick(e);
                  });
              }
  
              // 下拉框，例如 head
              if (type === 'droplist' && droplist) {
                  $elem.on('mouseenter', function (e) {
                      if (editor.selection.getRange() == null) {
                          return;
                      }
                      // 显示
                      droplist.showTimeoutId = setTimeout(function () {
                          droplist.show();
                      }, 200);
                  }).on('mouseleave', function (e) {
                      // 隐藏
                      droplist.hideTimeoutId = setTimeout(function () {
                          droplist.hide();
                      }, 0);
                  });
              }
  
              // 弹框类型，例如 link
              if (type === 'panel' && menu.onClick) {
                  $elem.on('click', function (e) {
                      e.stopPropagation();
                      if (editor.selection.getRange() == null) {
                          return;
                      }
                      // 在自定义事件中显示 panel
                      menu.onClick(e);
                  });
              }
          });
      },
  
      // 尝试修改菜单状态
      changeActive: function changeActive() {
          var menus = this.menus;
          objForEach(menus, function (key, menu) {
              if (menu.tryChangeActive) {
                  setTimeout(function () {
                      menu.tryChangeActive();
                  }, 100);
              }
          });
      }
  };
  
  /*
      粘贴信息的处理
  */
  
  // 获取粘贴的纯文本
  function getPasteText(e) {
      var clipboardData = e.clipboardData || e.originalEvent && e.originalEvent.clipboardData;
      var pasteText = void 0;
      if (clipboardData == null) {
          pasteText = window.clipboardData && window.clipboardData.getData('text');
      } else {
          pasteText = clipboardData.getData('text/plain');
      }
  
      return replaceHtmlSymbol(pasteText);
  }
  
  // 获取粘贴的html
  function getPasteHtml(e, filterStyle) {
      var clipboardData = e.clipboardData || e.originalEvent && e.originalEvent.clipboardData;
      var pasteText = void 0,
          pasteHtml = void 0;
      if (clipboardData == null) {
          pasteText = window.clipboardData && window.clipboardData.getData('text');
      } else {
          pasteText = clipboardData.getData('text/plain');
          pasteHtml = clipboardData.getData('text/html');
      }
      if (!pasteHtml && pasteText) {
          pasteHtml = '<p>' + replaceHtmlSymbol(pasteText) + '</p>';
      }
      if (!pasteHtml) {
          return;
      }
  
      // 过滤word中状态过来的无用字符
      var docSplitHtml = pasteHtml.split('</html>');
      if (docSplitHtml.length === 2) {
          pasteHtml = docSplitHtml[0];
      }
  
      // 过滤无用标签
      pasteHtml = pasteHtml.replace(/<(meta|script|link).+?>/igm, '');
      // 去掉注释
      pasteHtml = pasteHtml.replace(/<!--.*?-->/mg, '');
  
      if (filterStyle) {
          // 过滤样式
          pasteHtml = pasteHtml.replace(/\s?(class|style)=('|").+?('|")/igm, '');
      } else {
          // 保留样式
          pasteHtml = pasteHtml.replace(/\s?class=('|").+?('|")/igm, '');
      }
  
      return pasteHtml;
  }
  
  // 获取粘贴的图片文件
  function getPasteImgs(e) {
      var result = [];
      var txt = getPasteText(e);
      if (txt) {
          // 有文字，就忽略图片
          return result;
      }
  
      var clipboardData = e.clipboardData || e.originalEvent && e.originalEvent.clipboardData || {};
      var items = clipboardData.items;
      if (!items) {
          return result;
      }
  
      objForEach(items, function (key, value) {
          var type = value.type;
          if (/image/i.test(type)) {
              result.push(value.getAsFile());
          }
      });
  
      return result;
  }
  
  /*
      编辑区域
  */
  
  // 构造函数
  function Text(editor) {
      this.editor = editor;
  }
  
  // 修改原型
  Text.prototype = {
      constructor: Text,
  
      // 初始化
      init: function init() {
          // 绑定事件
          this._bindEvent();
      },
  
      // 清空内容
      clear: function clear() {
          this.html('<p><br></p>');
      },
  
      // 获取 设置 html
      html: function html(val) {
          var editor = this.editor;
          var $textElem = editor.$textElem;
          if (val == null) {
              return $textElem.html();
          } else {
              $textElem.html(val);
  
              // 初始化选取，将光标定位到内容尾部
              editor.initSelection();
          }
      },
  
      // 获取 设置 text
      text: function text(val) {
          var editor = this.editor;
          var $textElem = editor.$textElem;
          if (val == null) {
              return $textElem.text();
          } else {
              $textElem.text('<p>' + val + '</p>');
  
              // 初始化选取，将光标定位到内容尾部
              editor.initSelection();
          }
      },
  
      // 追加内容
      append: function append(html) {
          var editor = this.editor;
          var $textElem = editor.$textElem;
          $textElem.append($(html));
  
          // 初始化选取，将光标定位到内容尾部
          editor.initSelection();
      },
  
      // 绑定事件
      _bindEvent: function _bindEvent() {
          // 实时保存选取
          this._saveRangeRealTime();
  
          // 按回车建时的特殊处理
          this._enterKeyHandle();
  
          // 清空时保留 <p><br></p>
          this._clearHandle();
  
          // 粘贴事件（粘贴文字，粘贴图片）
          this._pasteHandle();
  
          // tab 特殊处理
          this._tabHandle();
  
          // img 点击
          this._imgHandle();
      },
  
      // 实时保存选取
      _saveRangeRealTime: function _saveRangeRealTime() {
          var editor = this.editor;
          var $textElem = editor.$textElem;
  
          // 保存当前的选区
          function saveRange(e) {
              // 随时保存选区
              editor.selection.saveRange();
              // 更新按钮 ative 状态
              editor.menus.changeActive();
          }
          // 按键后保存
          $textElem.on('keyup', saveRange);
          $textElem.on('mousedown', function (e) {
              // mousedown 状态下，鼠标滑动到编辑区域外面，也需要保存选区
              $textElem.on('mouseleave', saveRange);
          });
          $textElem.on('mouseup', function (e) {
              saveRange();
              // 在编辑器区域之内完成点击，取消鼠标滑动到编辑区外面的事件
              $textElem.off('mouseleave', saveRange);
          });
      },
  
      // 按回车键时的特殊处理
      _enterKeyHandle: function _enterKeyHandle() {
          var editor = this.editor;
          var $textElem = editor.$textElem;
  
          // 将回车之后生成的非 <p> 的顶级标签，改为 <p>
          function pHandle(e) {
              var $selectionElem = editor.selection.getSelectionContainerElem();
              var $parentElem = $selectionElem.parent();
              if (!$parentElem.equal($textElem)) {
                  // 不是顶级标签
                  return;
              }
              var nodeName = $selectionElem.getNodeName();
              if (nodeName === 'P') {
                  // 当前的标签是 P ，不用做处理
                  return;
              }
  
              if ($selectionElem.text()) {
                  // 有内容，不做处理
                  return;
              }
  
              // 插入 <p> ，并将选取定位到 <p>，删除当前标签
              var $p = $('<p><br></p>');
              $p.insertBefore($selectionElem);
              editor.selection.createRangeByElem($p, true);
              editor.selection.restoreSelection();
              $selectionElem.remove();
          }
  
          $textElem.on('keyup', function (e) {
              if (e.keyCode !== 13) {
                  // 不是回车键
                  return;
              }
              // 将回车之后生成的非 <p> 的顶级标签，改为 <p>
              pHandle(e);
          });
  
          // <pre><code></code></pre> 回车时 特殊处理
          function codeHandle(e) {
              var $selectionElem = editor.selection.getSelectionContainerElem();
              if (!$selectionElem) {
                  return;
              }
              var $parentElem = $selectionElem.parent();
              var selectionNodeName = $selectionElem.getNodeName();
              var parentNodeName = $parentElem.getNodeName();
  
              if (selectionNodeName !== 'CODE' || parentNodeName !== 'PRE') {
                  // 不符合要求 忽略
                  return;
              }
  
              if (!editor.cmd.queryCommandSupported('insertHTML')) {
                  // 必须原生支持 insertHTML 命令
                  return;
              }
  
              // 处理：光标定位到代码末尾，联系点击两次回车，即跳出代码块
              if (editor._willBreakCode === true) {
                  // 此时可以跳出代码块
                  // 插入 <p> ，并将选取定位到 <p>
                  var $p = $('<p><br></p>');
                  $p.insertAfter($parentElem);
                  editor.selection.createRangeByElem($p, true);
                  editor.selection.restoreSelection();
  
                  // 修改状态
                  editor._willBreakCode = false;
  
                  e.preventDefault();
                  return;
              }
  
              var _startOffset = editor.selection.getRange().startOffset;
  
              // 处理：回车时，不能插入 <br> 而是插入 \n ，因为是在 pre 标签里面
              editor.cmd.do('insertHTML', '\n');
              editor.selection.saveRange();
              if (editor.selection.getRange().startOffset === _startOffset) {
                  // 没起作用，再来一遍
                  editor.cmd.do('insertHTML', '\n');
              }
  
              var codeLength = $selectionElem.html().length;
              if (editor.selection.getRange().startOffset + 1 === codeLength) {
                  // 说明光标在代码最后的位置，执行了回车操作
                  // 记录下来，以便下次回车时候跳出 code
                  editor._willBreakCode = true;
              }
  
              // 阻止默认行为
              e.preventDefault();
          }
  
          $textElem.on('keydown', function (e) {
              if (e.keyCode !== 13) {
                  // 不是回车键
                  // 取消即将跳转代码块的记录
                  editor._willBreakCode = false;
                  return;
              }
              // <pre><code></code></pre> 回车时 特殊处理
              codeHandle(e);
          });
      },
  
      // 清空时保留 <p><br></p>
      _clearHandle: function _clearHandle() {
          var editor = this.editor;
          var $textElem = editor.$textElem;
  
          $textElem.on('keydown', function (e) {
              if (e.keyCode !== 8) {
                  return;
              }
              var txtHtml = $textElem.html().toLowerCase().trim();
              if (txtHtml === '<p><br></p>') {
                  // 最后剩下一个空行，就不再删除了
                  e.preventDefault();
                  return;
              }
          });
  
          $textElem.on('keyup', function (e) {
              if (e.keyCode !== 8) {
                  return;
              }
              var $p = void 0;
              var txtHtml = $textElem.html().toLowerCase().trim();
  
              // firefox 时用 txtHtml === '<br>' 判断，其他用 !txtHtml 判断
              if (!txtHtml || txtHtml === '<br>') {
                  // 内容空了
                  $p = $('<p><br/></p>');
                  $textElem.html(''); // 一定要先清空，否则在 firefox 下有问题
                  $textElem.append($p);
                  editor.selection.createRangeByElem($p, false, true);
                  editor.selection.restoreSelection();
              }
          });
      },
  
      // 粘贴事件（粘贴文字 粘贴图片）
      _pasteHandle: function _pasteHandle() {
          var editor = this.editor;
          var pasteFilterStyle = editor.config.pasteFilterStyle;
          var $textElem = editor.$textElem;
  
          // 粘贴文字
          $textElem.on('paste', function (e) {
              if (UA.isIE()) {
                  return;
              } else {
                  // 阻止默认行为，使用 execCommand 的粘贴命令
                  e.preventDefault();
              }
  
              // 获取粘贴的文字
              var pasteHtml = getPasteHtml(e, pasteFilterStyle);
              var pasteText = getPasteText(e);
              pasteText = pasteText.replace(/\n/gm, '<br>');
  
              var $selectionElem = editor.selection.getSelectionContainerElem();
              if (!$selectionElem) {
                  return;
              }
              var nodeName = $selectionElem.getNodeName();
  
              // code 中只能粘贴纯文本
              if (nodeName === 'CODE' || nodeName === 'PRE') {
                  editor.cmd.do('insertHTML', '<p>' + pasteText + '</p>');
                  return;
              }
  
              // 先放开注释，有问题再追查 ————
              // // 表格中忽略，可能会出现异常问题
              // if (nodeName === 'TD' || nodeName === 'TH') {
              //     return
              // }
  
              if (!pasteHtml) {
                  return;
              }
              try {
                  // firefox 中，获取的 pasteHtml 可能是没有 <ul> 包裹的 <li>
                  // 因此执行 insertHTML 会报错
                  editor.cmd.do('insertHTML', pasteHtml);
              } catch (ex) {
                  // 此时使用 pasteText 来兼容一下
                  editor.cmd.do('insertHTML', '<p>' + pasteText + '</p>');
              }
          });
  
          // 粘贴图片
          $textElem.on('paste', function (e) {
              if (UA.isIE()) {
                  return;
              } else {
                  e.preventDefault();
              }
  
              // 获取粘贴的图片
              var pasteFiles = getPasteImgs(e);
              if (!pasteFiles || !pasteFiles.length) {
                  return;
              }
  
              // 获取当前的元素
              var $selectionElem = editor.selection.getSelectionContainerElem();
              if (!$selectionElem) {
                  return;
              }
              var nodeName = $selectionElem.getNodeName();
  
              // code 中粘贴忽略
              if (nodeName === 'CODE' || nodeName === 'PRE') {
                  return;
              }
  
              // 上传图片
              var uploadImg = editor.uploadImg;
              uploadImg.uploadImg(pasteFiles);
          });
      },
  
      // tab 特殊处理
      _tabHandle: function _tabHandle() {
          var editor = this.editor;
          var $textElem = editor.$textElem;
  
          $textElem.on('keydown', function (e) {
              if (e.keyCode !== 9) {
                  return;
              }
              if (!editor.cmd.queryCommandSupported('insertHTML')) {
                  // 必须原生支持 insertHTML 命令
                  return;
              }
              var $selectionElem = editor.selection.getSelectionContainerElem();
              if (!$selectionElem) {
                  return;
              }
              var $parentElem = $selectionElem.parent();
              var selectionNodeName = $selectionElem.getNodeName();
              var parentNodeName = $parentElem.getNodeName();
  
              if (selectionNodeName === 'CODE' && parentNodeName === 'PRE') {
                  // <pre><code> 里面
                  editor.cmd.do('insertHTML', '    ');
              } else {
                  // 普通文字
                  editor.cmd.do('insertHTML', '&nbsp;&nbsp;&nbsp;&nbsp;');
              }
  
              e.preventDefault();
          });
      },
  
      // img 点击
      _imgHandle: function _imgHandle() {
          var editor = this.editor;
          var $textElem = editor.$textElem;
          var selectedClass = 'w-e-selected';
  
          // 为图片增加 selected 样式
          $textElem.on('click', 'img', function (e) {
              var img = this;
              var $img = $(img);
  
              // 去掉所有图片的 selected 样式
              $textElem.find('img').removeClass(selectedClass);
  
              // 为点击的图片增加样式，并记录当前图片
              $img.addClass(selectedClass);
              editor._selectedImg = $img;
  
              // 修改选取
              editor.selection.createRangeByElem($img);
          });
  
          // 去掉图片的 selected 样式
          $textElem.on('click  keyup', function (e) {
              if (e.target.matches('img')) {
                  // 点击的是图片，忽略
                  return;
              }
              // 取消掉 selected 样式，并删除记录
              $textElem.find('img').removeClass(selectedClass);
              editor._selectedImg = null;
          });
      }
  };
  
  /*
      命令，封装 document.execCommand
  */
  
  // 构造函数
  function Command(editor) {
      this.editor = editor;
  }
  
  // 修改原型
  Command.prototype = {
      constructor: Command,
  
      // 执行命令
      do: function _do(name, value) {
          var editor = this.editor;
  
          // 如果无选区，忽略
          if (!editor.selection.getRange()) {
              return;
          }
  
          // 恢复选取
          editor.selection.restoreSelection();
  
          // 执行
          var _name = '_' + name;
          if (this[_name]) {
              // 有自定义事件
              this[_name](value);
          } else {
              // 默认 command
              this._execCommand(name, value);
          }
  
          // 修改菜单状态
          editor.menus.changeActive();
  
          // 最后，恢复选取保证光标在原来的位置闪烁
          editor.selection.saveRange();
          editor.selection.restoreSelection();
  
          // 触发 onchange
          editor.change && editor.change();
      },
  
      // 自定义 insertHTML 事件
      _insertHTML: function _insertHTML(html) {
          var editor = this.editor;
          var range = editor.selection.getRange();
  
          if (this.queryCommandSupported('insertHTML')) {
              // W3C
              this._execCommand('insertHTML', html);
          } else if (range.insertNode) {
              // IE
              range.deleteContents();
              range.insertNode($(html)[0]);
          } else if (range.pasteHTML) {
              // IE <= 10
              range.pasteHTML(html);
          }
      },
  
      // 插入 elem
      _insertElem: function _insertElem($elem) {
          var editor = this.editor;
          var range = editor.selection.getRange();
  
          if (range.insertNode) {
              range.deleteContents();
              range.insertNode($elem[0]);
          }
      },
  
      // 封装 execCommand
      _execCommand: function _execCommand(name, value) {
          document.execCommand(name, false, value);
      },
  
      // 封装 document.queryCommandValue
      queryCommandValue: function queryCommandValue(name) {
          return document.queryCommandValue(name);
      },
  
      // 封装 document.queryCommandState
      queryCommandState: function queryCommandState(name) {
          return document.queryCommandState(name);
      },
  
      // 封装 document.queryCommandSupported
      queryCommandSupported: function queryCommandSupported(name) {
          return document.queryCommandSupported(name);
      }
  };
  
  /*
      selection range API
  */
  
  // 构造函数
  function API(editor) {
      this.editor = editor;
      this._currentRange = null;
  }
  
  // 修改原型
  API.prototype = {
      constructor: API,
  
      // 获取 range 对象
      getRange: function getRange() {
          return this._currentRange;
      },
  
      // 保存选区
      saveRange: function saveRange(_range) {
          if (_range) {
              // 保存已有选区
              this._currentRange = _range;
              return;
          }
  
          // 获取当前的选区
          var selection = window.getSelection();
          if (selection.rangeCount === 0) {
              return;
          }
          var range = selection.getRangeAt(0);
  
          // 判断选区内容是否在编辑内容之内
          var $containerElem = this.getSelectionContainerElem(range);
          if (!$containerElem) {
              return;
          }
          var editor = this.editor;
          var $textElem = editor.$textElem;
          if ($textElem.isContain($containerElem)) {
              // 是编辑内容之内的
              this._currentRange = range;
          }
      },
  
      // 折叠选区
      collapseRange: function collapseRange(toStart) {
          if (toStart == null) {
              // 默认为 false
              toStart = false;
          }
          var range = this._currentRange;
          if (range) {
              range.collapse(toStart);
          }
      },
  
      // 选中区域的文字
      getSelectionText: function getSelectionText() {
          var range = this._currentRange;
          if (range) {
              return this._currentRange.toString();
          } else {
              return '';
          }
      },
  
      // 选区的 $Elem
      getSelectionContainerElem: function getSelectionContainerElem(range) {
          range = range || this._currentRange;
          var elem = void 0;
          if (range) {
              elem = range.commonAncestorContainer;
              return $(elem.nodeType === 1 ? elem : elem.parentNode);
          }
      },
      getSelectionStartElem: function getSelectionStartElem(range) {
          range = range || this._currentRange;
          var elem = void 0;
          if (range) {
              elem = range.startContainer;
              return $(elem.nodeType === 1 ? elem : elem.parentNode);
          }
      },
      getSelectionEndElem: function getSelectionEndElem(range) {
          range = range || this._currentRange;
          var elem = void 0;
          if (range) {
              elem = range.endContainer;
              return $(elem.nodeType === 1 ? elem : elem.parentNode);
          }
      },
  
      // 选区是否为空
      isSelectionEmpty: function isSelectionEmpty() {
          var range = this._currentRange;
          if (range && range.startContainer) {
              if (range.startContainer === range.endContainer) {
                  if (range.startOffset === range.endOffset) {
                      return true;
                  }
              }
          }
          return false;
      },
  
      // 恢复选区
      restoreSelection: function restoreSelection() {
          var selection = window.getSelection();
          selection.removeAllRanges();
          selection.addRange(this._currentRange);
      },
  
      // 创建一个空白（即 &#8203 字符）选区
      createEmptyRange: function createEmptyRange() {
          var editor = this.editor;
          var range = this.getRange();
          var $elem = void 0;
  
          if (!range) {
              // 当前无 range
              return;
          }
          if (!this.isSelectionEmpty()) {
              // 当前选区必须没有内容才可以
              return;
          }
  
          try {
              // 目前只支持 webkit 内核
              if (UA.isWebkit()) {
                  // 插入 &#8203
                  editor.cmd.do('insertHTML', '&#8203;');
                  // 修改 offset 位置
                  range.setEnd(range.endContainer, range.endOffset + 1);
                  // 存储
                  this.saveRange(range);
              } else {
                  $elem = $('<strong>&#8203;</strong>');
                  editor.cmd.do('insertElem', $elem);
                  this.createRangeByElem($elem, true);
              }
          } catch (ex) {
              // 部分情况下会报错，兼容一下
          }
      },
  
      // 根据 $Elem 设置选区
      createRangeByElem: function createRangeByElem($elem, toStart, isContent) {
          // $elem - 经过封装的 elem
          // toStart - true 开始位置，false 结束位置
          // isContent - 是否选中Elem的内容
          if (!$elem.length) {
              return;
          }
  
          var elem = $elem[0];
          var range = document.createRange();
  
          if (isContent) {
              range.selectNodeContents(elem);
          } else {
              range.selectNode(elem);
          }
  
          if (typeof toStart === 'boolean') {
              range.collapse(toStart);
          }
  
          // 存储 range
          this.saveRange(range);
      }
  };
  
  /*
      上传进度条
  */
  
  function Progress(editor) {
      this.editor = editor;
      this._time = 0;
      this._isShow = false;
      this._isRender = false;
      this._timeoutId = 0;
      this.$textContainer = editor.$textContainerElem;
      this.$bar = $('<div class="w-e-progress"></div>');
  }
  
  Progress.prototype = {
      constructor: Progress,
  
      show: function show(progress) {
          var _this = this;
  
          // 状态处理
          if (this._isShow) {
              return;
          }
          this._isShow = true;
  
          // 渲染
          var $bar = this.$bar;
          if (!this._isRender) {
              var $textContainer = this.$textContainer;
              $textContainer.append($bar);
          } else {
              this._isRender = true;
          }
  
          // 改变进度（节流，100ms 渲染一次）
          if (Date.now() - this._time > 100) {
              if (progress <= 1) {
                  $bar.css('width', progress * 100 + '%');
                  this._time = Date.now();
              }
          }
  
          // 隐藏
          var timeoutId = this._timeoutId;
          if (timeoutId) {
              clearTimeout(timeoutId);
          }
          timeoutId = setTimeout(function () {
              _this._hide();
          }, 500);
      },
  
      _hide: function _hide() {
          var $bar = this.$bar;
          $bar.remove();
  
          // 修改状态
          this._time = 0;
          this._isShow = false;
          this._isRender = false;
      }
  };
  
  var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
    return typeof obj;
  } : function (obj) {
    return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
  };
  
  /*
      上传图片
  */
  
  // 构造函数
  function UploadImg(editor) {
      this.editor = editor;
  }
  
  // 原型
  UploadImg.prototype = {
      constructor: UploadImg,
  
      // 根据 debug 弹出不同的信息
      _alert: function _alert(alertInfo, debugInfo) {
          var editor = this.editor;
          var debug = editor.config.debug;
          var customAlert = editor.config.customAlert;
  
          if (debug) {
              throw new Error('wangEditor: ' + (debugInfo || alertInfo));
          } else {
              if (customAlert && typeof customAlert === 'function') {
                  customAlert(alertInfo);
              } else {
                  alert(alertInfo);
              }
          }
      },
  
      // 根据链接插入图片
      insertLinkImg: function insertLinkImg(link) {
          var _this2 = this;
  
          if (!link) {
              return;
          }
          var editor = this.editor;
          editor.cmd.do('insertHTML', '<img src="' + link + '" style="max-width:100%;"/>');
  
          // 验证图片 url 是否有效，无效的话给出提示
          var img = document.createElement('img');
          img.onload = function () {
              img = null;
          };
          img.onerror = function () {
              img = null;
              // 无法成功下载图片
              _this2._alert('插入图片错误', 'wangEditor: \u63D2\u5165\u56FE\u7247\u51FA\u9519\uFF0C\u56FE\u7247\u94FE\u63A5\u662F "' + link + '"\uFF0C\u4E0B\u8F7D\u8BE5\u94FE\u63A5\u5931\u8D25');
              return;
          };
          img.onabort = function () {
              img = null;
          };
          img.src = link;
      },
  
      // 上传图片
      uploadImg: function uploadImg(files) {
          var _this3 = this;
  
          if (!files || !files.length) {
              return;
          }
  
          // ------------------------------ 获取配置信息 ------------------------------
          var editor = this.editor;
          var config = editor.config;
          var maxSize = config.uploadImgMaxSize;
          var maxSizeM = maxSize / 1000 / 1000;
          var maxLength = config.uploadImgMaxLength || 10000;
          var uploadImgServer = config.uploadImgServer;
          var uploadImgShowBase64 = config.uploadImgShowBase64;
          var uploadFileName = config.uploadFileName || '';
          var uploadImgParams = config.uploadImgParams || {};
          var uploadImgHeaders = config.uploadImgHeaders || {};
          var hooks = config.uploadImgHooks || {};
          var timeout = config.uploadImgTimeout || 3000;
          var withCredentials = config.withCredentials;
          if (withCredentials == null) {
              withCredentials = false;
          }
          var customUploadImg = config.customUploadImg;
  
          // ------------------------------ 验证文件信息 ------------------------------
          var resultFiles = [];
          var errInfo = [];
          arrForEach(files, function (file) {
              var name = file.name;
              var size = file.size;
  
              // chrome 低版本 name === undefined
              if (!name || !size) {
                  return;
              }
  
              if (/\.(jpg|jpeg|png|bmp|gif)$/i.test(name) === false) {
                  // 后缀名不合法，不是图片
                  errInfo.push('\u3010' + name + '\u3011\u4E0D\u662F\u56FE\u7247');
                  return;
              }
              if (maxSize < size) {
                  // 上传图片过大
                  errInfo.push('\u3010' + name + '\u3011\u5927\u4E8E ' + maxSizeM + 'M');
                  return;
              }
  
              // 验证通过的加入结果列表
              resultFiles.push(file);
          });
          // 抛出验证信息
          if (errInfo.length) {
              this._alert('图片验证未通过: \n' + errInfo.join('\n'));
              return;
          }
          if (resultFiles.length > maxLength) {
              this._alert('一次最多上传' + maxLength + '张图片');
              return;
          }
  
          // ------------------------------ 自定义上传 ------------------------------
          if (customUploadImg && typeof customUploadImg === 'function') {
              customUploadImg(resultFiles, this.insertLinkImg.bind(this));
  
              // 阻止以下代码执行
              return;
          }
  
          // 添加图片数据
          var formdata = new FormData();
          arrForEach(resultFiles, function (file) {
              var name = uploadFileName || file.name;
              formdata.append(name, file);
          });
  
          // ------------------------------ 上传图片 ------------------------------
          if (uploadImgServer && typeof uploadImgServer === 'string') {
              // 添加参数
              var uploadImgServerArr = uploadImgServer.split('#');
              uploadImgServer = uploadImgServerArr[0];
              var uploadImgServerHash = uploadImgServerArr[1] || '';
              objForEach(uploadImgParams, function (key, val) {
                  val = encodeURIComponent(val);
  
                  // 第一，将参数拼接到 url 中
                  if (uploadImgServer.indexOf('?') > 0) {
                      uploadImgServer += '&';
                  } else {
                      uploadImgServer += '?';
                  }
                  uploadImgServer = uploadImgServer + key + '=' + val;
  
                  // 第二，将参数添加到 formdata 中
                  formdata.append(key, val);
              });
              if (uploadImgServerHash) {
                  uploadImgServer += '#' + uploadImgServerHash;
              }
  
              // 定义 xhr
              var xhr = new XMLHttpRequest();
              xhr.open('POST', uploadImgServer);
  
              // 设置超时
              xhr.timeout = timeout;
              xhr.ontimeout = function () {
                  // hook - timeout
                  if (hooks.timeout && typeof hooks.timeout === 'function') {
                      hooks.timeout(xhr, editor);
                  }
  
                  _this3._alert('上传图片超时');
              };
  
              // 监控 progress
              if (xhr.upload) {
                  xhr.upload.onprogress = function (e) {
                      var percent = void 0;
                      // 进度条
                      var progressBar = new Progress(editor);
                      if (e.lengthComputable) {
                          percent = e.loaded / e.total;
                          progressBar.show(percent);
                      }
                  };
              }
  
              // 返回数据
              xhr.onreadystatechange = function () {
                  var result = void 0;
                  if (xhr.readyState === 4) {
                      if (xhr.status < 200 || xhr.status >= 300) {
                          // hook - error
                          if (hooks.error && typeof hooks.error === 'function') {
                              hooks.error(xhr, editor);
                          }
  
                          // xhr 返回状态错误
                          _this3._alert('上传图片发生错误', '\u4E0A\u4F20\u56FE\u7247\u53D1\u751F\u9519\u8BEF\uFF0C\u670D\u52A1\u5668\u8FD4\u56DE\u72B6\u6001\u662F ' + xhr.status);
                          return;
                      }
  
                      result = xhr.responseText;
                      if ((typeof result === 'undefined' ? 'undefined' : _typeof(result)) !== 'object') {
                          try {
                              result = JSON.parse(result);
                          } catch (ex) {
                              // hook - fail
                              if (hooks.fail && typeof hooks.fail === 'function') {
                                  hooks.fail(xhr, editor, result);
                              }
  
                              _this3._alert('上传图片失败', '上传图片返回结果错误，返回结果是: ' + result);
                              return;
                          }
                      }
                      if (!hooks.customInsert && result.errno != '0') {
                          // hook - fail
                          if (hooks.fail && typeof hooks.fail === 'function') {
                              hooks.fail(xhr, editor, result);
                          }
  
                          // 数据错误
                          _this3._alert('上传图片失败', '上传图片返回结果错误，返回结果 errno=' + result.errno);
                      } else {
                          if (hooks.customInsert && typeof hooks.customInsert === 'function') {
                              // 使用者自定义插入方法
                              hooks.customInsert(_this3.insertLinkImg.bind(_this3), result, editor);
                          } else {
                              // 将图片插入编辑器
                              var data = result.data || [];
                              data.forEach(function (link) {
                                  _this3.insertLinkImg(link);
                              });
                          }
  
                          // hook - success
                          if (hooks.success && typeof hooks.success === 'function') {
                              hooks.success(xhr, editor, result);
                          }
                      }
                  }
              };
  
              // hook - before
              if (hooks.before && typeof hooks.before === 'function') {
                  var beforeResult = hooks.before(xhr, editor, resultFiles);
                  if (beforeResult && (typeof beforeResult === 'undefined' ? 'undefined' : _typeof(beforeResult)) === 'object') {
                      if (beforeResult.prevent) {
                          // 如果返回的结果是 {prevent: true, msg: 'xxxx'} 则表示用户放弃上传
                          this._alert(beforeResult.msg);
                          return;
                      }
                  }
              }
  
              // 自定义 headers
              objForEach(uploadImgHeaders, function (key, val) {
                  xhr.setRequestHeader(key, val);
              });
  
              // 跨域传 cookie
              xhr.withCredentials = withCredentials;
  
              // 发送请求
              xhr.send(formdata);
  
              // 注意，要 return 。不去操作接下来的 base64 显示方式
              return;
          }
  
          // ------------------------------ 显示 base64 格式 ------------------------------
          if (uploadImgShowBase64) {
              arrForEach(files, function (file) {
                  var _this = _this3;
                  var reader = new FileReader();
                  reader.readAsDataURL(file);
                  reader.onload = function () {
                      _this.insertLinkImg(this.result);
                  };
              });
          }
      }
  };
  
  /*
      编辑器构造函数
  */
  
  // id，累加
  var editorId = 1;
  
  // 构造函数
  function Editor(toolbarSelector, textSelector) {
      if (toolbarSelector == null) {
          // 没有传入任何参数，报错
          throw new Error('错误：初始化编辑器时候未传入任何参数，请查阅文档');
      }
      // id，用以区分单个页面不同的编辑器对象
      this.id = 'wangEditor-' + editorId++;
  
      this.toolbarSelector = toolbarSelector;
      this.textSelector = textSelector;
  
      // 自定义配置
      this.customConfig = {};
  }
  
  // 修改原型
  Editor.prototype = {
      constructor: Editor,
  
      // 初始化配置
      _initConfig: function _initConfig() {
          // _config 是默认配置，this.customConfig 是用户自定义配置，将它们 merge 之后再赋值
          var target = {};
          this.config = Object.assign(target, config, this.customConfig);
  
          // 将语言配置，生成正则表达式
          var langConfig = this.config.lang || {};
          var langArgs = [];
          objForEach(langConfig, function (key, val) {
              // key 即需要生成正则表达式的规则，如“插入链接”
              // val 即需要被替换成的语言，如“insert link”
              langArgs.push({
                  reg: new RegExp(key, 'img'),
                  val: val
  
              });
          });
          this.config.langArgs = langArgs;
      },
  
      // 初始化 DOM
      _initDom: function _initDom() {
          var _this = this;
  
          var toolbarSelector = this.toolbarSelector;
          var $toolbarSelector = $(toolbarSelector);
          var textSelector = this.textSelector;
  
          var config$$1 = this.config;
          var zIndex = config$$1.zIndex;
  
          // 定义变量
          var $toolbarElem = void 0,
              $textContainerElem = void 0,
              $textElem = void 0,
              $children = void 0;
  
          if (textSelector == null) {
              // 只传入一个参数，即是容器的选择器或元素，toolbar 和 text 的元素自行创建
              $toolbarElem = $('<div></div>');
              $textContainerElem = $('<div></div>');
  
              // 将编辑器区域原有的内容，暂存起来
              $children = $toolbarSelector.children();
  
              // 添加到 DOM 结构中
              $toolbarSelector.append($toolbarElem).append($textContainerElem);
  
              // 自行创建的，需要配置默认的样式
              $toolbarElem.css('background-color', '#f1f1f1').css('border', '1px solid #ccc');
              $textContainerElem.css('border', '1px solid #ccc').css('border-top', 'none').css('height', '500px');
          } else {
              // toolbar 和 text 的选择器都有值，记录属性
              $toolbarElem = $toolbarSelector;
              $textContainerElem = $(textSelector);
              // 将编辑器区域原有的内容，暂存起来
              $children = $textContainerElem.children();
          }
  
          // 编辑区域
          $textElem = $('<div></div>');
          $textElem.attr('contenteditable', 'true').css('width', '100%').css('height', '100%');
  
          // 初始化编辑区域内容
          if ($children && $children.length) {
              $textElem.append($children);
          } else {
              $textElem.append($('<p><br></p>'));
          }
  
          // 编辑区域加入DOM
          $textContainerElem.append($textElem);
  
          // 设置通用的 class
          $toolbarElem.addClass('w-e-toolbar');
          $textContainerElem.addClass('w-e-text-container');
          $textContainerElem.css('z-index', zIndex);
          $textElem.addClass('w-e-text');
  
          // 添加 ID
          var toolbarElemId = getRandom('toolbar-elem');
          $toolbarElem.attr('id', toolbarElemId);
          var textElemId = getRandom('text-elem');
          $textElem.attr('id', textElemId);
  
          // 记录属性
          this.$toolbarElem = $toolbarElem;
          this.$textContainerElem = $textContainerElem;
          this.$textElem = $textElem;
          this.toolbarElemId = toolbarElemId;
          this.textElemId = textElemId;
  
          // 绑定 onchange
          $textContainerElem.on('click keyup', function () {
              _this.change && _this.change();
          });
          $toolbarElem.on('click', function () {
              this.change && this.change();
          });
      },
  
      // 封装 command
      _initCommand: function _initCommand() {
          this.cmd = new Command(this);
      },
  
      // 封装 selection range API
      _initSelectionAPI: function _initSelectionAPI() {
          this.selection = new API(this);
      },
  
      // 添加图片上传
      _initUploadImg: function _initUploadImg() {
          this.uploadImg = new UploadImg(this);
      },
  
      // 初始化菜单
      _initMenus: function _initMenus() {
          this.menus = new Menus(this);
          this.menus.init();
      },
  
      // 添加 text 区域
      _initText: function _initText() {
          this.txt = new Text(this);
          this.txt.init();
      },
  
      // 初始化选区，将光标定位到内容尾部
      initSelection: function initSelection(newLine) {
          var $textElem = this.$textElem;
          var $children = $textElem.children();
          if (!$children.length) {
              // 如果编辑器区域无内容，添加一个空行，重新设置选区
              $textElem.append($('<p><br></p>'));
              this.initSelection();
              return;
          }
  
          var $last = $children.last();
  
          if (newLine) {
              // 新增一个空行
              var html = $last.html().toLowerCase();
              var nodeName = $last.getNodeName();
              if (html !== '<br>' && html !== '<br\/>' || nodeName !== 'P') {
                  // 最后一个元素不是 <p><br></p>，添加一个空行，重新设置选区
                  $textElem.append($('<p><br></p>'));
                  this.initSelection();
                  return;
              }
          }
  
          this.selection.createRangeByElem($last, false, true);
          this.selection.restoreSelection();
      },
  
      // 绑定事件
      _bindEvent: function _bindEvent() {
          // -------- 绑定 onchange 事件 --------
          var onChangeTimeoutId = 0;
          var beforeChangeHtml = this.txt.html();
          var config$$1 = this.config;
          var onchange = config$$1.onchange;
          if (onchange && typeof onchange === 'function') {
              // 触发 change 的有三个场景：
              // 1. $textContainerElem.on('click keyup')
              // 2. $toolbarElem.on('click')
              // 3. editor.cmd.do()
              this.change = function () {
                  // 判断是否有变化
                  var currentHtml = this.txt.html();
                  if (currentHtml.length === beforeChangeHtml.length) {
                      return;
                  }
  
                  // 执行，使用节流
                  if (onChangeTimeoutId) {
                      clearTimeout(onChangeTimeoutId);
                  }
                  onChangeTimeoutId = setTimeout(function () {
                      // 触发配置的 onchange 函数
                      onchange(currentHtml);
                      beforeChangeHtml = currentHtml;
                  }, 200);
              };
          }
      },
  
      // 创建编辑器
      create: function create() {
          // 初始化配置信息
          this._initConfig();
  
          // 初始化 DOM
          this._initDom();
  
          // 封装 command API
          this._initCommand();
  
          // 封装 selection range API
          this._initSelectionAPI();
  
          // 添加 text
          this._initText();
  
          // 初始化菜单
          this._initMenus();
  
          // 添加 图片上传
          this._initUploadImg();
  
          // 初始化选区，将光标定位到内容尾部
          this.initSelection(true);
  
          // 绑定事件
          this._bindEvent();
      }
  };
  
  // 检验是否浏览器环境
  try {
      document;
  } catch (ex) {
      throw new Error('请在浏览器环境下运行');
  }
  
  // polyfill
  polyfill();
  
  // 这里的 `inlinecss` 将被替换成 css 代码的内容，详情可去 ./gulpfile.js 中搜索 `inlinecss` 关键字
  var inlinecss = '.w-e-toolbar,.w-e-text-container,.w-e-menu-panel {  padding: 0;  margin: 0;  box-sizing: border-box;}.w-e-toolbar *,.w-e-text-container *,.w-e-menu-panel * {  padding: 0;  margin: 0;  box-sizing: border-box;}.w-e-clear-fix:after {  content: "";  display: table;  clear: both;}.w-e-toolbar .w-e-droplist {  position: absolute;  left: 0;  top: 0;  background-color: #fff;  border: 1px solid #f1f1f1;  border-right-color: #ccc;  border-bottom-color: #ccc;}.w-e-toolbar .w-e-droplist .w-e-dp-title {  text-align: center;  color: #999;  line-height: 2;  border-bottom: 1px solid #f1f1f1;  font-size: 13px;}.w-e-toolbar .w-e-droplist ul.w-e-list {  list-style: none;  line-height: 1;}.w-e-toolbar .w-e-droplist ul.w-e-list li.w-e-item {  color: #333;  padding: 5px 0;}.w-e-toolbar .w-e-droplist ul.w-e-list li.w-e-item:hover {  background-color: #f1f1f1;}.w-e-toolbar .w-e-droplist ul.w-e-block {  list-style: none;  text-align: left;  padding: 5px;}.w-e-toolbar .w-e-droplist ul.w-e-block li.w-e-item {  display: inline-block;  *display: inline;  *zoom: 1;  padding: 3px 5px;}.w-e-toolbar .w-e-droplist ul.w-e-block li.w-e-item:hover {  background-color: #f1f1f1;}@font-face {  font-family: \'w-e-icon\';  src: 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