(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];
        }
    }

// 记录所有的事件绑定
    var eventList = [];

// 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;
        var nodeType = selector.nodeType;

        // 根据 selector 得出的结果（如 DOM，DOM List）
        var selectorResult = [];
        if (nodeType === 9) {
            // document 节点
            selectorResult = [selector];
        } else if (nodeType === 1) {
            // 单个 DOM 节点
            selectorResult = [selector];
        } else if (isDOMList(selector) || selector instanceof Array) {
            // DOM List 或者数组
            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;
        },

        // clone
        clone: function clone(deep) {
            var cloneList = [];
            this.forEach(function (elem) {
                cloneList.push(elem.cloneNode(!!deep));
            });
            return $(cloneList);
        },

        // 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;
                    }

                    // 记录下，方便后面解绑
                    eventList.push({
                        elem: elem,
                        type: type,
                        fn: fn
                    });

                    if (!selector) {
                        // 无代理
                        elem.addEventListener(type, fn);
                        return;
                    }

                    // 有代理
                    elem.addEventListener(type, function (e) {
                        var target = e.target;
                        if (target.matches(selector)) {
                            fn.call(target, e);
                        }
                    });
                });
            });
        },

        // 取消事件绑定
        off: function off(type, fn) {
            return this.forEach(function (elem) {
                elem.removeEventListener(type, fn);
            });
        },

        // 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);
        },

        // 获取子节点（包括文本节点）
        childNodes: function childNodes() {
            var elem = this[0];
            if (!elem) {
                return null;
            }

            return $(elem.childNodes);
        },

        // 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);
    }

// 解绑所有事件，用于销毁编辑器
    $.offAll = function () {
        eventList.forEach(function (item) {
            var elem = item.elem;
            var type = item.type;
            var fn = item.fn;
            // 解绑
            elem.removeEventListener(type, fn);
        });
    };

    /*
     配置信息
     */

    var config = {

        // 默认菜单配置
        menus: ['head', 'bold', 'fontSize', 'fontName', 'italic', 'underline', 'strikeThrough', 'foreColor', 'backColor', 'link', 'list', 'justify', 'quote', 'emoticon', 'image', 'table', 'video', 'code', 'undo', 'redo'],

        fontNames: ['宋体', '微软雅黑', 'Arial', 'Tahoma', 'Verdana'],

        colors: ['#000000', '#eeece0', '#1c487f', '#4d80bf', '#c24f4a', '#8baa4a', '#7b5ba1', '#46acc8', '#f9963b', '#ffffff'],

        // // 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'
        // },

        // 表情
        emotions: [{
            // tab 的标题
            title: '默认',
            // type -> 'emoji' / 'image'
            type: 'image',
            // content -> 数组
            content: [{
                alt: '[坏笑]',
                src: 'http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/50/pcmoren_huaixiao_org.png'
            }, {
                alt: '[舔屏]',
                src: 'http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/40/pcmoren_tian_org.png'
            }, {
                alt: '[污]',
                src: 'http://img.t.sinajs.cn/t4/appstyle/expression/ext/normal/3c/pcmoren_wu_org.png'
            }]
        }, {
            // tab 的标题
            title: '新浪',
            // type -> 'emoji' / 'image'
            type: 'image',
            // content -> 数组
            content: [{
                src: 'http://img.t.sinajs.cn/t35/style/images/common/face/ext/normal/7a/shenshou_thumb.gif',
                alt: '[草泥马]'
            }, {
                src: 'http://img.t.sinajs.cn/t35/style/images/common/face/ext/normal/60/horse2_thumb.gif',
                alt: '[神马]'
            }, {
                src: 'http://img.t.sinajs.cn/t35/style/images/common/face/ext/normal/bc/fuyun_thumb.gif',
                alt: '[浮云]'
            }]
        }, {
            // tab 的标题
            title: 'emoji',
            // type -> 'emoji' / 'image'
            type: 'emoji',
            // content -> 数组
            content: '😀 😃 😄 😁 😆 😅 😂 😊 😇 🙂 🙃 😉 😓 😪 😴 🙄 🤔 😬 🤐'.split(/\s/)
        }],

        // 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,

        // 插入链接时候的格式校验
        linkCheck: function linkCheck(text, link) {
            // text 是插入的文字
            // link 是插入的链接
            return true; // 返回 true 即表示成功
            // return '校验失败' // 返回字符串即表示失败的提示信息
        },

        // 插入网络图片的校验
        linkImgCheck: function linkImgCheck(src) {
            // src 即图片的地址
            return true; // 返回 true 即表示成功
            // return '校验失败'  // 返回字符串即表示失败的提示信息
        },

        // 粘贴过滤样式，默认开启
        pasteFilterStyle: true,

        // 粘贴内容时，忽略图片。默认关闭
        pasteIgnoreImg: false,

        // 对粘贴的文字进行自定义处理，返回处理后的结果。编辑器会将处理后的结果粘贴到编辑区域中。
        // IE 暂时不支持
        pasteTextHandle: function pasteTextHandle(content) {
            // content 即粘贴过来的内容（html 或 纯文本），可进行自定义处理然后返回
            return content;
        },

        // 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,

        // 插入网络图片的回调
        linkImgCallback: function linkImgCallback(url) {
            // console.log(url)  // url 即插入图片的地址
        },

        // 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;').replace(/(\r\n|\r|\n)/g, '<br/>');
    }

// 返回百分比的格式


// 判断是不是 function
    function isFunction(fn) {
        return typeof fn === 'function';
    }

    /*
     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);
                $li.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');
            }
        }
    };

    /*
     menu - fontSize
     */

// 构造函数
    function FontSize(editor) {
        var _this = this;

        this.editor = editor;
        this.$elem = $('<div class="w-e-menu"><i class="w-e-icon-text-heigh"></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: 160,
            $title: $('<p>字号</p>'),
            type: 'list', // droplist 以列表形式展示
            list: [{ $elem: $('<span style="font-size: x-small;">x-small</span>'), value: '1' }, { $elem: $('<span style="font-size: small;">small</span>'), value: '2' }, { $elem: $('<span>normal</span>'), value: '3' }, { $elem: $('<span style="font-size: large;">large</span>'), value: '4' }, { $elem: $('<span style="font-size: x-large;">x-large</span>'), value: '5' }, { $elem: $('<span style="font-size: xx-large;">xx-large</span>'), value: '6' }],
            onClick: function onClick(value) {
                // 注意 this 是指向当前的 FontSize 对象
                _this._command(value);
            }
        });
    }

// 原型
    FontSize.prototype = {
        constructor: FontSize,

        // 执行命令
        _command: function _command(value) {
            var editor = this.editor;
            editor.cmd.do('fontSize', value);
        }
    };

    /*
     menu - fontName
     */

// 构造函数
    function FontName(editor) {
        var _this = this;

        this.editor = editor;
        this.$elem = $('<div class="w-e-menu"><i class="w-e-icon-font"></i></div>');
        this.type = 'droplist';

        // 当前是否 active 状态
        this._active = false;

        // 获取配置的字体
        var config = editor.config;
        var fontNames = config.fontNames || [];

        // 初始化 droplist
        this.droplist = new DropList(this, {
            width: 100,
            $title: $('<p>字体</p>'),
            type: 'list', // droplist 以列表形式展示
            list: fontNames.map(function (fontName) {
                return { $elem: $('<span style="font-family: ' + fontName + ';">' + fontName + '</span>'), value: fontName };
            }),
            onClick: function onClick(value) {
                // 注意 this 是指向当前的 FontName 对象
                _this._command(value);
            }
        });
    }

// 原型
    FontName.prototype = {
        constructor: FontName,

        _command: function _command(value) {
            var editor = this.editor;
            editor.cmd.do('fontName', value);
        }
    };

    /*
     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) {
            var editor = this.editor;
            var config = editor.config;
            var linkCheck = config.linkCheck;
            var checkResult = true; // 默认为 true
            if (linkCheck && typeof linkCheck === 'function') {
                checkResult = linkCheck(text, link);
            }
            if (checkResult === true) {
                editor.cmd.do('insertHTML', '<a href="' + link + '" target="_blank">' + text + '</a>');
            } else {
                alert(checkResult);
            }
        },

        // 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';

        // 获取配置的颜色
        var config = editor.config;
        var colors = config.colors || [];

        // 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: colors.map(function (color) {
                return { $elem: $('<i style="color:' + color + ';" class="w-e-icon-pencil2"></i>'), value: color };
            }),
            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';

        // 获取配置的颜色
        var config = editor.config;
        var colors = config.colors || [];

        // 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: colors.map(function (color) {
                return { $elem: $('<i style="color:' + color + ';" class="w-e-icon-paint-brush"></i>'), value: color };
            }),
            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;
            var $selectionElem = editor.selection.getSelectionContainerElem();
            var nodeName = $selectionElem.getNodeName();

            if (!UA.isIE()) {
                if (nodeName === 'BLOCKQUOTE') {
                    // 撤销 quote
                    editor.cmd.do('formatBlock', '<P>');
                } else {
                    // 转换为 quote
                    editor.cmd.do('formatBlock', '<BLOCKQUOTE>');
                }
                return;
            }

            // IE 中不支持 formatBlock <BLOCKQUOTE> ，要用其他方式兼容
            var content = void 0,
                $targetELem = void 0;
            if (nodeName === 'P') {
                // 将 P 转换为 quote
                content = $selectionElem.text();
                $targetELem = $('<blockquote>' + content + '</blockquote>');
                $targetELem.insertAfter($selectionElem);
                $selectionElem.remove();
                return;
            }
            if (nodeName === '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;

            var editor = this.editor;
            var config = editor.config;
            // 获取表情配置
            var emotions = config.emotions || [];

            // 创建表情 dropPanel 的配置
            var tabConfig = [];
            emotions.forEach(function (emotData) {
                var emotType = emotData.type;
                var content = emotData.content || [];

                // 这一组表情最终拼接出来的 html
                var faceHtml = '';

                // emoji 表情
                if (emotType === 'emoji') {
                    content.forEach(function (item) {
                        if (item) {
                            faceHtml += '<span class="w-e-item">' + item + '</span>';
                        }
                    });
                }
                // 图片表情
                if (emotType === 'image') {
                    content.forEach(function (item) {
                        var src = item.src;
                        var alt = item.alt;
                        if (src) {
                            // 加一个 data-w-e 属性，点击图片的时候不再提示编辑图片
                            faceHtml += '<span class="w-e-item"><img src="' + src + '" alt="' + alt + '" data-w-e="1"/></span>';
                        }
                    });
                }

                tabConfig.push({
                    title: emotData.title,
                    tpl: '<div class="w-e-emoticon-container">' + faceHtml + '</div>',
                    events: [{
                        selector: 'span.w-e-item',
                        type: 'click',
                        fn: function fn(e) {
                            var target = e.target;
                            var $target = $(target);
                            var nodeName = $target.getNodeName();

                            var insertHtml = void 0;
                            if (nodeName === 'IMG') {
                                // 插入图片
                                insertHtml = $target.parent().html();
                            } else {
                                // 插入 emoji
                                insertHtml = '<span>' + $target.html() + '</span>';
                            }

                            _this._insert(insertHtml);
                            // 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;
                        }
                    }]
                });
            });

            var panel = new Panel(this, {
                width: 300,
                height: 200,
                // 一个 Panel 包含多个 tab
                tabs: tabConfig
            });

            // 显示 panel
            panel.show();

            // 记录属性
            this.panel = panel;
        },

        // 插入表情
        _insert: function _insert(emotHtml) {
            var editor = this.editor;
            editor.cmd.do('insertHTML', emotHtml);
        }
    };

    /*
     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.fontSize = FontSize;

    MenuConstructors.fontName = FontName;

    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, ignoreImg) {
        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, '');
        // 过滤 data-xxx 属性
        pasteHtml = pasteHtml.replace(/\s?data-.+?=('|").+?('|")/igm, '');

        if (ignoreImg) {
            // 忽略图片
            pasteHtml = pasteHtml.replace(/<img.+?>/igm, '');
        }

        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
     */

// 获取一个 elem.childNodes 的 JSON 数据
    function getChildrenJSON($elem) {
        var result = [];
        var $children = $elem.childNodes() || []; // 注意 childNodes() 可以获取文本节点
        $children.forEach(function (curElem) {
            var elemResult = void 0;
            var nodeType = curElem.nodeType;

            // 文本节点
            if (nodeType === 3) {
                elemResult = curElem.textContent;
                elemResult = replaceHtmlSymbol(elemResult);
            }

            // 普通 DOM 节点
            if (nodeType === 1) {
                elemResult = {};

                // tag
                elemResult.tag = curElem.nodeName.toLowerCase();
                // attr
                var attrData = [];
                var attrList = curElem.attributes || {};
                var attrListLength = attrList.length || 0;
                for (var i = 0; i < attrListLength; i++) {
                    var attr = attrList[i];
                    attrData.push({
                        name: attr.name,
                        value: attr.value
                    });
                }
                elemResult.attrs = attrData;
                // children（递归）
                elemResult.children = getChildrenJSON($(curElem));
            }

            result.push(elemResult);
        });
        return result;
    }

// 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;
            var html = void 0;
            if (val == null) {
                html = $textElem.html();
                // 未选中任何内容的时候点击“加粗”或者“斜体”等按钮，就得需要一个空的占位符 &#8203 ，这里替换掉
                html = html.replace(/\u200b/gm, '');
                return html;
            } else {
                $textElem.html(val);

                // 初始化选取，将光标定位到内容尾部
                editor.initSelection();
            }
        },

        // 获取 JSON
        getJSON: function getJSON() {
            var editor = this.editor;
            var $textElem = editor.$textElem;
            return getChildrenJSON($textElem);
        },

        // 获取 设置 text
        text: function text(val) {
            var editor = this.editor;
            var $textElem = editor.$textElem;
            var text = void 0;
            if (val == null) {
                text = $textElem.text();
                // 未选中任何内容的时候点击“加粗”或者“斜体”等按钮，就得需要一个空的占位符 &#8203 ，这里替换掉
                text = text.replace(/\u200b/gm, '');
                return 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();

            // 拖拽事件
            this._dragHandle();
        },

        // 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;

            function insertEmptyP($selectionElem) {
                var $p = $('<p><br></p>');
                $p.insertBefore($selectionElem);
                editor.selection.createRangeByElem($p, true);
                editor.selection.restoreSelection();
                $selectionElem.remove();
            }

            // 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 ($parentElem.html() === '<code><br></code>') {
                    // 回车之前光标所在一个 <p><code>.....</code></p> ，忽然回车生成一个空的 <p><code><br></code></p>
                    // 而且继续回车跳不出去，因此只能特殊处理
                    insertEmptyP($selectionElem);
                    return;
                }

                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
                insertEmptyP($selectionElem);
            }

            $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 config = editor.config;
            var pasteFilterStyle = config.pasteFilterStyle;
            var pasteTextHandle = config.pasteTextHandle;
            var ignoreImg = config.pasteIgnoreImg;
            var $textElem = editor.$textElem;

            // 粘贴图片、文本的事件，每次只能执行一个
            // 判断该次粘贴事件是否可以执行
            var pasteTime = 0;
            function canDo() {
                var now = Date.now();
                var flag = false;
                if (now - pasteTime >= 100) {
                    // 间隔大于 100 ms ，可以执行
                    flag = true;
                }
                pasteTime = now;
                return flag;
            }
            function resetTime() {
                pasteTime = 0;
            }

            // 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();
                }

                // 粘贴图片和文本，只能同时使用一个
                if (!canDo()) {
                    return;
                }

                // 获取粘贴的文字
                var pasteHtml = getPasteHtml(e, pasteFilterStyle, ignoreImg);
                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') {
                    if (pasteTextHandle && isFunction(pasteTextHandle)) {
                        // 用户自定义过滤处理粘贴内容
                        pasteText = '' + (pasteTextHandle(pasteText) || '');
                    }
                    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) {
                    // 没有内容，可继续执行下面的图片粘贴
                    resetTime();
                    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
                    if (pasteTextHandle && isFunction(pasteTextHandle)) {
                        // 用户自定义过滤处理粘贴内容
                        pasteHtml = '' + (pasteTextHandle(pasteHtml) || '');
                    }
                    editor.cmd.do('insertHTML', pasteHtml);
                } catch (ex) {
                    // 此时使用 pasteText 来兼容一下
                    if (pasteTextHandle && isFunction(pasteTextHandle)) {
                        // 用户自定义过滤处理粘贴内容
                        pasteText = '' + (pasteTextHandle(pasteText) || '');
                    }
                    editor.cmd.do('insertHTML', '<p>' + pasteText + '</p>');
                }
            });

            // 粘贴图片
            $textElem.on('paste', function (e) {
                if (UA.isIE()) {
                    return;
                } else {
                    e.preventDefault();
                }

                // 粘贴图片和文本，只能同时使用一个
                if (!canDo()) {
                    return;
                }

                // 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;

            // 为图片增加 selected 样式
            $textElem.on('click', 'img', function (e) {
                var img = this;
                var $img = $(img);

                if ($img.attr('data-w-e') === '1') {
                    // 是表情图片，忽略
                    return;
                }

                // 记录当前点击过的图片
                editor._selectedImg = $img;

                // 修改选区并 restore ，防止用户此时点击退格键，会删除其他内容
                editor.selection.createRangeByElem($img);
                editor.selection.restoreSelection();
            });

            // 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;
                }
                // 删除记录
                editor._selectedImg = null;
            });
        },

        // 拖拽事件
        _dragHandle: function _dragHandle() {
            var editor = this.editor;

            // 禁用 document 拖拽事件
            var $document = $(document);
            $document.on('dragleave drop dragenter dragover', function (e) {
                e.preventDefault();
            });

            // 添加编辑区域拖拽事件
            var $textElem = editor.$textElem;
            $textElem.on('drop', function (e) {
                e.preventDefault();
                var files = e.dataTransfer && e.dataTransfer.files;
                if (!files || !files.length) {
                    return;
                }

                // 上传图片
                var uploadImg = editor.uploadImg;
                uploadImg.uploadImg(files);
            });
        }
    };

    /*
     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;

            // 使用 styleWithCSS
            if (!editor._useStyleWithCSS) {
                document.execCommand('styleWithCSS', null, true);
                editor._useStyleWithCSS = true;
            }

            // 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;
            }

            // 判断选区内容是否在不可编辑区域之内
            if ($containerElem.attr('contenteditable') === 'false' || $containerElem.parentUntil('[contenteditable=false]')) {
                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;
            var config = editor.config;

            // 校验格式
            var linkImgCheck = config.linkImgCheck;
            var checkResult = void 0;
            if (linkImgCheck && typeof linkImgCheck === 'function') {
                checkResult = linkImgCheck(link);
                if (typeof checkResult === 'string') {
                    // 校验失败，提示信息
                    alert(checkResult);
                    return;
                }
            }

            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 () {
                var callback = config.linkImgCallback;
                if (callback && typeof callback === 'function') {
                    callback(link);
                }

                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 uploadImgServer = config.uploadImgServer;
            var uploadImgShowBase64 = config.uploadImgShowBase64;

            var maxSize = config.uploadImgMaxSize;
            var maxSizeM = maxSize / 1024 / 1024;
            var maxLength = config.uploadImgMaxLength || 10000;
            var uploadFileName = config.uploadFileName || '';
            var uploadImgParams = config.uploadImgParams || {};
            var uploadImgParamsWithUrl = config.uploadImgParamsWithUrl;
            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;

            if (!customUploadImg) {
                // 没有 customUploadImg 的情况下，需要如下两个配置才能继续进行图片上传
                if (!uploadImgServer && !uploadImgShowBase64) {
                    return;
                }
            }

            // ------------------------------ 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|webp)$/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) {
                    // 因使用者反应，自定义参数不能默认 encode ，由 v3.1.1 版本开始注释掉
                    // val = encodeURIComponent(val)

                    // 第一，将参数拼接到 url 中
                    if (uploadImgParamsWithUrl) {
                        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', '300px');
            } 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;

            // 记录输入法的开始和结束
            var compositionEnd = true;
            $textContainerElem.on('compositionstart', function () {
                // 输入法开始输入
                compositionEnd = false;
            });
            $textContainerElem.on('compositionend', function () {
                // 输入法结束输入
                compositionEnd = true;
            });

            // 绑定 onchange
            $textContainerElem.on('click keyup', function () {
                // 输入法结束才出发 onchange
                compositionEnd && _this.change && _this.change();
            });
            $toolbarElem.on('click', function () {
                this.change && this.change();
            });

            //绑定 onfocus 与 onblur 事件
            if (config$$1.onfocus || config$$1.onblur) {
                // 当前编辑器是否是焦点状态
                this.isFocus = false;

                $(document).on('click', function (e) {
                    //判断当前点击元素是否在编辑器内
                    var isChild = $textElem.isContain($(e.target));

                    //判断当前点击元素是否为工具栏
                    var isToolbar = $toolbarElem.isContain($(e.target));
                    var isMenu = $toolbarElem[0] == e.target ? true : false;

                    if (!isChild) {
                        //若为选择工具栏中的功能，则不视为成blur操作
                        if (isToolbar && !isMenu) {
                            return;
                        }

                        if (_this.isFocus) {
                            _this.onblur && _this.onblur();
                        }
                        _this.isFocus = false;
                    } else {
                        if (!_this.isFocus) {
                            _this.onfocus && _this.onfocus();
                        }
                        _this.isFocus = true;
                    }
                });
            }
        },

        // 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;

            // onchange 触发延迟时间
            var onchangeTimeout = config$$1.onchangeTimeout;
            onchangeTimeout = parseInt(onchangeTimeout, 10);
            if (!onchangeTimeout || onchangeTimeout <= 0) {
                onchangeTimeout = 200;
            }

            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) {
                        // 需要比较每一个字符
                        if (currentHtml === beforeChangeHtml) {
                            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;
                    }, onchangeTimeout);
                };
            }

            // -------- 绑定 onblur 事件 --------
            var onblur = config$$1.onblur;
            if (onblur && typeof onblur === 'function') {
                this.onblur = function () {
                    var currentHtml = this.txt.html();
                    onblur(currentHtml);
                };
            }

            // -------- 绑定 onfocus 事件 --------
            var onfocus = config$$1.onfocus;
            if (onfocus && typeof onfocus === 'function') {
                this.onfocus = function () {
                    onfocus();
                };
            }
        },

        // 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();
        },

        // 解绑所有事件（暂时不对外开放）
        _offAllEvent: function _offAllEvent() {
            $.offAll();
        }
    };

// 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: url(data:application/x-font-woff;charset=utf-8;base64, ) format(\'truetype\');  font-weight: normal;  font-style: normal;}[class^="w-e-icon-"],[class*=" w-e-icon-"] {  /* use !important to prevent issues with browser extensions that change fonts */  font-family: \'w-e-icon\' !important;  speak: none;  font-style: normal;  font-weight: normal;  font-variant: normal;  text-transform: none;  line-height: 1;  /* Better Font Rendering =========== */  -webkit-font-smoothing: antialiased;  -moz-osx-font-smoothing: grayscale;}.w-e-icon-close:before {  content: "\\f00d";}.w-e-icon-upload2:before {  content: "\\e9c6";}.w-e-icon-trash-o:before {  content: "\\f014";}.w-e-icon-header:before {  content: "\\f1dc";}.w-e-icon-pencil2:before {  content: "\\e906";}.w-e-icon-paint-brush:before {  content: "\\f1fc";}.w-e-icon-image:before {  content: "\\e90d";}.w-e-icon-play:before {  content: "\\e912";}.w-e-icon-location:before {  content: "\\e947";}.w-e-icon-undo:before {  content: "\\e965";}.w-e-icon-redo:before {  content: "\\e966";}.w-e-icon-quotes-left:before {  content: "\\e977";}.w-e-icon-list-numbered:before {  content: "\\e9b9";}.w-e-icon-list2:before {  content: "\\e9bb";}.w-e-icon-link:before {  content: "\\e9cb";}.w-e-icon-happy:before {  content: "\\e9df";}.w-e-icon-bold:before {  content: "\\ea62";}.w-e-icon-underline:before {  content: "\\ea63";}.w-e-icon-italic:before {  content: "\\ea64";}.w-e-icon-strikethrough:before {  content: "\\ea65";}.w-e-icon-table2:before {  content: "\\ea71";}.w-e-icon-paragraph-left:before {  content: "\\ea77";}.w-e-icon-paragraph-center:before {  content: "\\ea78";}.w-e-icon-paragraph-right:before {  content: "\\ea79";}.w-e-icon-terminal:before {  content: "\\f120";}.w-e-icon-page-break:before {  content: "\\ea68";}.w-e-icon-cancel-circle:before {  content: "\\ea0d";}.w-e-icon-font:before {  content: "\\ea5c";}.w-e-icon-text-heigh:before {  content: "\\ea5f";}.w-e-toolbar {  display: -webkit-box;  display: -ms-flexbox;  display: flex;  padding: 0 5px;  /* flex-wrap: wrap; */  /* 单个菜单 */}.w-e-toolbar .w-e-menu {  position: relative;  text-align: center;  padding: 5px 10px;  cursor: pointer;}.w-e-toolbar .w-e-menu i {  color: #999;}.w-e-toolbar .w-e-menu:hover i {  color: #333;}.w-e-toolbar .w-e-active i {  color: #1e88e5;}.w-e-toolbar .w-e-active:hover i {  color: #1e88e5;}.w-e-text-container .w-e-panel-container {  position: absolute;  top: 0;  left: 50%;  border: 1px solid #ccc;  border-top: 0;  box-shadow: 1px 1px 2px #ccc;  color: #333;  background-color: #fff;  /* 为 emotion panel 定制的样式 */  /* 上传图片的 panel 定制样式 */}.w-e-text-container .w-e-panel-container .w-e-panel-close {  position: absolute;  right: 0;  top: 0;  padding: 5px;  margin: 2px 5px 0 0;  cursor: pointer;  color: #999;}.w-e-text-container .w-e-panel-container .w-e-panel-close:hover {  color: #333;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-title {  list-style: none;  display: -webkit-box;  display: -ms-flexbox;  display: flex;  font-size: 14px;  margin: 2px 10px 0 10px;  border-bottom: 1px solid #f1f1f1;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-title .w-e-item {  padding: 3px 5px;  color: #999;  cursor: pointer;  margin: 0 3px;  position: relative;  top: 1px;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-title .w-e-active {  color: #333;  border-bottom: 1px solid #333;  cursor: default;  font-weight: 700;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content {  padding: 10px 15px 10px 15px;  font-size: 16px;  /* 输入框的样式 */  /* 按钮的样式 */}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content input:focus,.w-e-text-container .w-e-panel-container .w-e-panel-tab-content textarea:focus,.w-e-text-container .w-e-panel-container .w-e-panel-tab-content button:focus {  outline: none;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content textarea {  width: 100%;  border: 1px solid #ccc;  padding: 5px;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content textarea:focus {  border-color: #1e88e5;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content input[type=text] {  border: none;  border-bottom: 1px solid #ccc;  font-size: 14px;  height: 20px;  color: #333;  text-align: left;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content input[type=text].small {  width: 30px;  text-align: center;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content input[type=text].block {  display: block;  width: 100%;  margin: 10px 0;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content input[type=text]:focus {  border-bottom: 2px solid #1e88e5;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content .w-e-button-container button {  font-size: 14px;  color: #1e88e5;  border: none;  padding: 5px 10px;  background-color: #fff;  cursor: pointer;  border-radius: 3px;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content .w-e-button-container button.left {  float: left;  margin-right: 10px;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content .w-e-button-container button.right {  float: right;  margin-left: 10px;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content .w-e-button-container button.gray {  color: #999;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content .w-e-button-container button.red {  color: #c24f4a;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content .w-e-button-container button:hover {  background-color: #f1f1f1;}.w-e-text-container .w-e-panel-container .w-e-panel-tab-content .w-e-button-container:after {  content: "";  display: table;  clear: both;}.w-e-text-container .w-e-panel-container .w-e-emoticon-container .w-e-item {  cursor: pointer;  font-size: 18px;  padding: 0 3px;  display: inline-block;  *display: inline;  *zoom: 1;}.w-e-text-container .w-e-panel-container .w-e-up-img-container {  text-align: center;}.w-e-text-container .w-e-panel-container .w-e-up-img-container .w-e-up-btn {  display: inline-block;  *display: inline;  *zoom: 1;  color: #999;  cursor: pointer;  font-size: 60px;  line-height: 1;}.w-e-text-container .w-e-panel-container .w-e-up-img-container .w-e-up-btn:hover {  color: #333;}.w-e-text-container {  position: relative;}.w-e-text-container .w-e-progress {  position: absolute;  background-color: #1e88e5;  bottom: 0;  left: 0;  height: 1px;}.w-e-text {  padding: 0 10px;  overflow-y: scroll;}.w-e-text p,.w-e-text h1,.w-e-text h2,.w-e-text h3,.w-e-text h4,.w-e-text h5,.w-e-text table,.w-e-text pre {  margin: 10px 0;  line-height: 1.5;}.w-e-text ul,.w-e-text ol {  margin: 10px 0 10px 20px;}.w-e-text blockquote {  display: block;  border-left: 8px solid #d0e5f2;  padding: 5px 10px;  margin: 10px 0;  line-height: 1.4;  font-size: 100%;  background-color: #f1f1f1;}.w-e-text code {  display: inline-block;  *display: inline;  *zoom: 1;  background-color: #f1f1f1;  border-radius: 3px;  padding: 3px 5px;  margin: 0 3px;}.w-e-text pre code {  display: block;}.w-e-text table {  border-top: 1px solid #ccc;  border-left: 1px solid #ccc;}.w-e-text table td,.w-e-text table th {  border-bottom: 1px solid #ccc;  border-right: 1px solid #ccc;  padding: 3px 5px;}.w-e-text table th {  border-bottom: 2px solid #ccc;  text-align: center;}.w-e-text:focus {  outline: none;}.w-e-text img {  cursor: pointer;}.w-e-text img:hover {  box-shadow: 0 0 5px #333;}';

// 将 css 代码添加到 <style> 中
    var style = document.createElement('style');
    style.type = 'text/css';
    style.innerHTML = inlinecss;
    document.getElementsByTagName('HEAD').item(0).appendChild(style);

// 返回
    var index = window.wangEditor || Editor;

    return index;

})));

layui.define(function(exports) {
    exports('wangEditor', window.wangEditor);
});