/*
 * Editor.md
 *
 * @file        editormd.amd.js 
 * @version     v2.0.1 
 * @description Open source online markdown editor.
 * @license     MIT License
 * @author      Pandao
 * {@link       https://github.com/pandao/editor.md}
 * @updateTime  2018-03-29
 */

;(function(factory) {
  "use strict"

  // CommonJS/Node.js
  if (
    typeof require === "function" &&
    typeof exports === "object" &&
    typeof module === "object"
  ) {
    module.exports = factory
  } else if (typeof define === "function") {
    // AMD/CMD/Sea.js
    if (define.amd) {
      // for Require.js
      var cmModePath  = "codemirror/mode/";
            var cmAddonPath = "codemirror/addon/";

            var codeMirrorModules = [
                "jquery", "marked", "prettify",
                "katex", "raphael", "underscore", "flowchart",  "jqueryflowchart",  "sequenceDiagram",

                "codemirror/lib/codemirror",
                cmModePath + "css/css",
                cmModePath + "sass/sass",
                cmModePath + "shell/shell",
                cmModePath + "sql/sql",
                cmModePath + "clike/clike",
                cmModePath + "php/php",
                cmModePath + "xml/xml",
                cmModePath + "markdown/markdown",
                cmModePath + "javascript/javascript",
                cmModePath + "htmlmixed/htmlmixed",
                cmModePath + "gfm/gfm",
                cmModePath + "http/http",
                cmModePath + "go/go",
                cmModePath + "dart/dart",
                cmModePath + "coffeescript/coffeescript",
                cmModePath + "nginx/nginx",
                cmModePath + "python/python",
                cmModePath + "perl/perl",
                cmModePath + "lua/lua",
                cmModePath + "r/r", 
                cmModePath + "ruby/ruby", 
                cmModePath + "rst/rst",
                cmModePath + "smartymixed/smartymixed",
                cmModePath + "vb/vb",
                cmModePath + "vbscript/vbscript",
                cmModePath + "velocity/velocity",
                cmModePath + "xquery/xquery",
                cmModePath + "yaml/yaml",
                cmModePath + "erlang/erlang",
                cmModePath + "jade/jade",

                cmAddonPath + "edit/trailingspace", 
                cmAddonPath + "dialog/dialog", 
                cmAddonPath + "search/searchcursor", 
                cmAddonPath + "search/search", 
                cmAddonPath + "scroll/annotatescrollbar", 
                cmAddonPath + "search/matchesonscrollbar", 
                cmAddonPath + "display/placeholder", 
                cmAddonPath + "edit/closetag", 
                cmAddonPath + "fold/foldcode",
                cmAddonPath + "fold/foldgutter",
                cmAddonPath + "fold/indent-fold",
                cmAddonPath + "fold/brace-fold",
                cmAddonPath + "fold/xml-fold", 
                cmAddonPath + "fold/markdown-fold",
                cmAddonPath + "fold/comment-fold", 
                cmAddonPath + "mode/overlay", 
                cmAddonPath + "selection/active-line", 
                cmAddonPath + "edit/closebrackets", 
                cmAddonPath + "display/fullscreen",
                cmAddonPath + "search/match-highlighter"
            ];

            define(codeMirrorModules, factory);
    } else {
      define(["jquery"], factory) // for Sea.js
    }
  } else {
    window.editormd = factory()
  }
})(function() {
  if (typeof define == "function" && define.amd) {
       $          = arguments[0];
       marked     = arguments[1];
       prettify   = arguments[2];
       katex      = arguments[3];
       Raphael    = arguments[4];
       _          = arguments[5];
       flowchart  = arguments[6];
       CodeMirror = arguments[9];
   }

  "use strict"

  var $ = typeof jQuery !== "undefined" ? jQuery : Zepto

  if (typeof $ === "undefined") {
    return
  }

  /**
   * editormd
   *
   * @param   {String} id           编辑器的ID
   * @param   {Object} options      配置选项 Key/Value
   * @returns {Object} editormd     返回editormd对象
   */

  var editormd = function(id, options) {
    return new editormd.fn.init(id, options)
  }

  editormd.title = editormd.$name = "Editor.md"
  editormd.version = "1.5.0"
  editormd.homePage = "https://pandao.github.io/editor.md/"
  editormd.classPrefix = "editormd-"

  editormd.toolbarModes = {
    full: [
      "undo",
      "redo",
      "|",
      "bold",
      "del",
      "italic",
      "quote",
      "ucwords",
      "uppercase",
      "lowercase",
      "|",
      "h1",
      "h2",
      "h3",
      "h4",
      "h5",
      "h6",
      "|",
      "list-ul",
      "list-ol",
      "hr",
      "|",
      "link",
      "reference-link",
      "image",
      "code",
      "preformatted-text",
      "code-block",
      "table",
      "datetime",
      "emoji",
      "html-entities",
      "pagebreak",
      "|",
      "goto-line",
      "watch",
      "preview",
      "fullscreen",
      "clear",
      "search",
      "|",
      "help",
      "info"
    ],
    simple: [
      "undo",
      "redo",
      "|",
      "bold",
      "del",
      "italic",
      "quote",
      "uppercase",
      "lowercase",
      "|",
      "h1",
      "h2",
      "h3",
      "h4",
      "h5",
      "h6",
      "|",
      "list-ul",
      "list-ol",
      "hr",
      "|",
      "watch",
      "preview",
      "fullscreen",
      "|",
      "help",
      "info"
    ],
    mini: ["undo", "redo", "|", "watch", "preview", "|", "help", "info"]
  }

  editormd.defaults = {
    mode: "gfm", //gfm or markdown
    name: "", // Form element name
    value: "", // value for CodeMirror, if mode not gfm/markdown
    theme: "", // Editor.md self themes, before v1.5.0 is CodeMirror theme, default empty
    editorTheme: "default", // Editor area, this is CodeMirror theme at v1.5.0
    previewTheme: "", // Preview area theme, default empty
    markdown: "", // Markdown source code
    appendMarkdown: "", // if in init textarea value not empty, append markdown to textarea
    width: "100%",
    height: "100%",
    path: "./lib/", // Dependents module file directory
    pluginPath: "", // If this empty, default use settings.path + "../plugins/"
    delay: 300, // Delay parse markdown to html, Uint : ms
    autoLoadModules: true, // Automatic load dependent module files
    watch: true,
    placeholder: "Enjoy Markdown! coding now...",
    gotoLine: true,
    codeFold: false,
    autoHeight: false,
    minHeight: "150px",
    maxHeight: "none", // default "none"
    autoFocus: true,
    autoCloseTags: true,
    searchReplace: true,
    syncScrolling: true, // true | false | "single", default true
    readOnly: false,
    tabSize: 4,
    indentUnit: 4,
    lineNumbers: true,
    lineWrapping: true,
    autoCloseBrackets: true,
    showTrailingSpace: true,
    matchBrackets: true,
    indentWithTabs: true,
    styleSelectedText: true,
    matchWordHighlight: true, // options: true, false, "onselected"
    styleActiveLine: true, // Highlight the current line
    dialogLockScreen: true,
    dialogShowMask: true,
    dialogDraggable: true,
    dialogMaskBgColor: "#fff",
    dialogMaskOpacity: 0.1,
    fontSize: "13px",
    saveHTMLToTextarea: false,
    disabledKeyMaps: [],
    onload: function() {},
    onresize: function() {},
    onchange: function() {},
    onwatch: null,
    onunwatch: null,
    onpreviewing: function() {},
    onpreviewed: function() {},
    onfullscreen: function() {},
    onfullscreenExit: function() {},
    onscroll: function() {},
    onpreviewscroll: function() {},
    imageUpload: false,
    imageFormats: ["jpg", "jpeg", "gif", "png", "bmp", "webp"],
    imageUploadURL: "",
    crossDomainUpload: false,
    uploadCallbackURL: "",
    toc: true, // Table of contents
    tocm: false, // Using [TOCM], auto create ToC dropdown menu
    tocTitle: "", // for ToC dropdown menu btn
    tocDropdown: false,
    tocContainer: "",
    tocStartLevel: 1, // Said from H1 to create ToC
    htmlDecode: false, // Open the HTML tag identification
    pageBreak: true, // Enable parse page break [========]
    atLink: true, // for @link
    emailLink: true, // for email address auto link
    taskList: false, // Enable Github Flavored Markdown task lists
    emoji: false, // :emoji: , Support Github emoji, Twitter Emoji (Twemoji);
    // Support FontAwesome icon emoji :fa-xxx: > Using fontAwesome icon web fonts;
    // Support Editor.md logo icon emoji :editormd-logo: :editormd-logo-1x: > 1~8x;
    tex: false, // TeX(LaTeX), based on KaTeX
    flowChart: false, // flowChart.js only support IE9+
    sequenceDiagram: false, // sequenceDiagram.js only support IE9+
    previewCodeHighlight: true,
    toolbar: true, // show/hide toolbar
    toolbarAutoFixed: true, // on window scroll auto fixed position
    toolbarIcons: "full",
    toolbarTitles: {},
    toolbarHandlers: {
      ucwords: function() {
        return editormd.toolbarHandlers.ucwords
      },
      lowercase: function() {
        return editormd.toolbarHandlers.lowercase
      }
    },
    toolbarCustomIcons: {
      // using html tag create toolbar icon, unused default <a> tag.
      lowercase:
        '<a href="javascript:;" title="Lowercase" unselectable="on"><i class="fa" name="lowercase" style="font-size:24px;margin-top: -10px;">a</i></a>',
      ucwords:
        '<a href="javascript:;" title="ucwords" unselectable="on"><i class="fa" name="ucwords" style="font-size:20px;margin-top: -3px;">Aa</i></a>'
    },
    toolbarIconsClass: {
      undo: "fa-undo",
      redo: "fa-repeat",
      bold: "fa-bold",
      del: "fa-strikethrough",
      italic: "fa-italic",
      quote: "fa-quote-left",
      uppercase: "fa-font",
      h1: editormd.classPrefix + "bold",
      h2: editormd.classPrefix + "bold",
      h3: editormd.classPrefix + "bold",
      h4: editormd.classPrefix + "bold",
      h5: editormd.classPrefix + "bold",
      h6: editormd.classPrefix + "bold",
      "list-ul": "fa-list-ul",
      "list-ol": "fa-list-ol",
      hr: "fa-minus",
      link: "fa-link",
      "reference-link": "fa-anchor",
      image: "fa-picture-o",
      code: "fa-code",
      "preformatted-text": "fa-file-code-o",
      "code-block": "fa-file-code-o",
      table: "fa-table",
      datetime: "fa-clock-o",
      emoji: "fa-smile-o",
      "html-entities": "fa-copyright",
      pagebreak: "fa-newspaper-o",
      "goto-line": "fa-terminal", // fa-crosshairs
      watch: "fa-eye-slash",
      unwatch: "fa-eye",
      preview: "fa-desktop",
      search: "fa-search",
      fullscreen: "fa-arrows-alt",
      clear: "fa-eraser",
      help: "fa-question-circle",
      info: "fa-info-circle"
    },
    toolbarIconTexts: {},
    lang: {
      name: "zh-cn",
      description:
        "开源在线Markdown编辑器<br/>Open source online Markdown editor.",
      tocTitle: "目录",
      toolbar: {
        undo: "撤销（Ctrl+Z）",
        redo: "重做（Ctrl+Y）",
        bold: "粗体",
        del: "删除线",
        italic: "斜体",
        quote: "引用",
        ucwords: "将每个单词首字母转成大写",
        uppercase: "将所选转换成大写",
        lowercase: "将所选转换成小写",
        h1: "标题1",
        h2: "标题2",
        h3: "标题3",
        h4: "标题4",
        h5: "标题5",
        h6: "标题6",
        "list-ul": "无序列表",
        "list-ol": "有序列表",
        hr: "横线",
        link: "链接",
        "reference-link": "引用链接",
        image: "添加图片",
        code: "行内代码",
        "preformatted-text": "预格式文本 / 代码块（缩进风格）",
        "code-block": "代码块（多语言风格）",
        table: "添加表格",
        datetime: "日期时间",
        emoji: "Emoji表情",
        "html-entities": "HTML实体字符",
        pagebreak: "插入分页符",
        "goto-line": "跳转到行",
        watch: "关闭实时预览",
        unwatch: "开启实时预览",
        preview: "全窗口预览HTML（按 Shift + ESC还原）",
        fullscreen: "全屏（按ESC还原）",
        clear: "清空",
        search: "搜索",
        help: "使用帮助",
        info: "关于" + editormd.title
      },
      buttons: {
        enter: "确定",
        cancel: "取消",
        close: "关闭"
      },
      dialog: {
        link: {
          title: "添加链接",
          url: "链接地址",
          urlTitle: "链接标题",
          urlEmpty: "错误：请填写链接地址。"
        },
        referenceLink: {
          title: "添加引用链接",
          name: "引用名称",
          url: "链接地址",
          urlId: "链接ID",
          urlTitle: "链接标题",
          nameEmpty: "错误：引用链接的名称不能为空。",
          idEmpty: "错误：请填写引用链接的ID。",
          urlEmpty: "错误：请填写引用链接的URL地址。"
        },
        image: {
          title: "添加图片",
          url: "图片地址",
          link: "图片链接",
          alt: "图片描述",
          uploadButton: "本地上传",
          imageURLEmpty: "错误：图片地址不能为空。",
          uploadFileEmpty: "错误：上传的图片不能为空。",
          formatNotAllowed:
            "错误：只允许上传图片文件，允许上传的图片文件格式有："
        },
        preformattedText: {
          title: "添加预格式文本或代码块",
          emptyAlert: "错误：请填写预格式文本或代码的内容。"
        },
        codeBlock: {
          title: "添加代码块",
          selectLabel: "代码语言：",
          selectDefaultText: "请选择代码语言",
          otherLanguage: "其他语言",
          unselectedLanguageAlert: "错误：请选择代码所属的语言类型。",
          codeEmptyAlert: "错误：请填写代码内容。"
        },
        htmlEntities: {
          title: "HTML 实体字符"
        },
        help: {
          title: "使用帮助"
        }
      }
    }
  }
  editormd.classNames = {
    tex: editormd.classPrefix + "tex"
  }
  editormd.dialogZindex = 99999
  editormd.$katex = null
  editormd.$marked = null
  editormd.$CodeMirror = null
  editormd.$prettyPrint = null

  var timer, flowchartTimer

  editormd.prototype = editormd.fn = {
    state: {
      watching: false,
      loaded: false,
      preview: false,
      fullscreen: false
    },

    /**
     * 构造函数/实例初始化
     * Constructor / instance initialization
     *
     * @param   {String}   id            编辑器的ID
     * @param   {Object}   [options={}]  配置选项 Key/Value
     * @returns {editormd}               返回editormd的实例对象
     */

    init: function(id, options) {
      options = options || {}
      if (typeof id === "object") {
        options = id
      }
      var _this = this
      var classPrefix = (this.classPrefix = editormd.classPrefix)
      var settings = (this.settings = $.extend(
        true,
        editormd.defaults,
        options
      ))
      id = typeof id === "object" ? settings.id : id

      var editor = (this.editor = $("#" + id))
      this.id = id
      this.lang = settings.lang
      var classNames = (this.classNames = {
        textarea: {
          html: classPrefix + "html-textarea",
          markdown: classPrefix + "markdown-textarea"
        }
      })
      settings.pluginPath =
        settings.pluginPath === ""
          ? settings.path + "../plugins/"
          : settings.pluginPath

      this.state.watching = settings.watch ? true : false
      if (!editor.hasClass("editormd")) {
        editor.addClass("editormd")
      }
      editor.css({
        width:
          typeof settings.width === "number"
            ? settings.width + "px"
            : settings.width,
        height:
          typeof settings.height === "number"
            ? settings.height + "px"
            : settings.height
      })
      if (settings.autoHeight) {
        editor.css({
          height: "auto",
          minHeight: settings.minHeight
        })
      }
      var markdownTextarea = (this.markdownTextarea = editor.children(
        "textarea"
      ))
      if (markdownTextarea.length < 1) {
        editor.append("<textarea></textarea>")
        markdownTextarea = this.markdownTextarea = editor.children("textarea")
      }
      markdownTextarea
        .addClass(classNames.textarea.markdown)
        .attr("placeholder", settings.placeholder)
      if (
        typeof markdownTextarea.attr("name") === "undefined" ||
        markdownTextarea.attr("name") === ""
      ) {
        markdownTextarea.attr(
          "name",
          settings.name !== "" ? settings.name : id + "-markdown-doc"
        )
      }
      var appendElements = [
        !settings.readOnly
          ? '<a href="javascript:;" class="fa fa-close ' +
            classPrefix +
            'preview-close-btn"></a>'
          : "",
        settings.saveHTMLToTextarea
          ? '<textarea class="' +
            classNames.textarea.html +
            '" name="' +
            id +
            '-html-code"></textarea>'
          : "",
        '<div class="' +
          classPrefix +
          'preview"><div class="markdown-body ' +
          classPrefix +
          'preview-container"></div></div>',
        '<div class="' +
          classPrefix +
          'container-mask" style="display:block;"></div>',
        '<div class="' + classPrefix + 'mask"></div>'
      ].join("\n")
      editor.append(appendElements).addClass(classPrefix + "vertical")
      if (settings.theme !== "") {
        editor.addClass(classPrefix + "theme-" + settings.theme)
      }
      this.mask = editor.children("." + classPrefix + "mask")
      this.containerMask = editor.children("." + classPrefix + "container-mask")
      if (settings.markdown !== "") {
        markdownTextarea.val(settings.markdown)
      }
      if (settings.appendMarkdown !== "") {
        markdownTextarea.val(markdownTextarea.val() + settings.appendMarkdown)
      }
      this.htmlTextarea = editor.children("." + classNames.textarea.html)
      this.preview = editor.children("." + classPrefix + "preview")
      this.previewContainer = this.preview.children(
        "." + classPrefix + "preview-container"
      )
      if (settings.previewTheme !== "") {
        this.preview.addClass(
          classPrefix + "preview-theme-" + settings.previewTheme
        )
      }
      if (typeof define === "function" && define.amd) {
        if (typeof katex !== "undefined") {
          editormd.$katex = katex
        }
        if (settings.searchReplace && !settings.readOnly) {
          editormd.loadCSS(settings.path + "codemirror/addon/dialog/dialog")
          editormd.loadCSS(
            settings.path + "codemirror/addon/search/matchesonscrollbar"
          )
        }
      }
      if (
        (typeof define === "function" && define.amd) ||
        !settings.autoLoadModules
      ) {
        if (typeof CodeMirror !== "undefined") {
          editormd.$CodeMirror = CodeMirror
        }

        if (typeof marked !== "undefined") {
          editormd.$marked = marked
        }
        this.setCodeMirror()
          .setToolbar()
          .loadedDisplay()
      } else {
        this.loadQueues()
      }
      return this
    },

    /**
     * 所需组件加载队列
     * Required components loading queue
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    loadQueues: function() {
      var _this = this
      var settings = this.settings
      var loadPath = settings.path
      var loadFlowChartOrSequenceDiagram = function() {
        if (editormd.isIE8) {
          _this.loadedDisplay()
          return
        }
        if (settings.flowChart || settings.sequenceDiagram) {
          editormd.loadScript(loadPath + "raphael.min", function() {
            editormd.loadScript(loadPath + "underscore.min", function() {
              if (!settings.flowChart && settings.sequenceDiagram) {
                editormd.loadScript(
                  loadPath + "sequence-diagram.min",
                  function() {
                    _this.loadedDisplay()
                  }
                )
              } else if (settings.flowChart && !settings.sequenceDiagram) {
                editormd.loadScript(loadPath + "flowchart.min", function() {
                  editormd.loadScript(
                    loadPath + "jquery.flowchart.min",
                    function() {
                      _this.loadedDisplay()
                    }
                  )
                })
              } else if (settings.flowChart && settings.sequenceDiagram) {
                editormd.loadScript(loadPath + "flowchart.min", function() {
                  editormd.loadScript(
                    loadPath + "jquery.flowchart.min",
                    function() {
                      editormd.loadScript(
                        loadPath + "sequence-diagram.min",
                        function() {
                          _this.loadedDisplay()
                        }
                      )
                    }
                  )
                })
              }
            })
          })
        } else {
          _this.loadedDisplay()
        }
      }

      editormd.loadCSS(loadPath + "codemirror/codemirror.min")
      if (settings.searchReplace && !settings.readOnly) {
        editormd.loadCSS(loadPath + "codemirror/addon/dialog/dialog")
        editormd.loadCSS(
          loadPath + "codemirror/addon/search/matchesonscrollbar"
        )
      }
      if (settings.codeFold) {
        editormd.loadCSS(loadPath + "codemirror/addon/fold/foldgutter")
      }
      editormd.loadScript(loadPath + "codemirror/codemirror.min", function() {
        editormd.$CodeMirror = CodeMirror
        editormd.loadScript(loadPath + "codemirror/modes.min", function() {
          editormd.loadScript(loadPath + "codemirror/addons.min", function() {
            _this.setCodeMirror()
            if (settings.mode !== "gfm" && settings.mode !== "markdown") {
              _this.loadedDisplay()
              return false
            }
            _this.setToolbar()
            editormd.loadScript(loadPath + "marked.min", function() {
              editormd.$marked = marked

              if (settings.previewCodeHighlight) {
                editormd.loadScript(loadPath + "prettify.min", function() {
                  loadFlowChartOrSequenceDiagram()
                })
              } else {
                loadFlowChartOrSequenceDiagram()
              }
            })
          })
        })
      })
      return this
    },

    /**
     * 设置 Editor.md 的整体主题，主要是工具栏
     * Setting Editor.md theme
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    setTheme: function(theme) {
      var editor = this.editor
      var oldTheme = this.settings.theme
      var themePrefix = this.classPrefix + "theme-"
      editor.removeClass(themePrefix + oldTheme).addClass(themePrefix + theme)
      this.settings.theme = theme
      return this
    },

    /**
     * 设置 CodeMirror（编辑区）的主题
     * Setting CodeMirror (Editor area) theme
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    setEditorTheme: function(theme) {
      var settings = this.settings
      settings.editorTheme = theme
      if (theme !== "default") {
        editormd.loadCSS(
          settings.path + "codemirror/theme/" + settings.editorTheme
        )
      }
      this.cm.setOption("theme", theme)
      return this
    },

    /**
     * setEditorTheme() 的别名
     * setEditorTheme() alias
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    setCodeMirrorTheme: function(theme) {
      this.setEditorTheme(theme)
      return this
    },

    /**
     * 设置 Editor.md 的主题
     * Setting Editor.md theme
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    setPreviewTheme: function(theme) {
      var preview = this.preview
      var oldTheme = this.settings.previewTheme
      var themePrefix = this.classPrefix + "preview-theme-"
      preview.removeClass(themePrefix + oldTheme).addClass(themePrefix + theme)
      this.settings.previewTheme = theme
      return this
    },

    /**
     * 配置和初始化CodeMirror组件
     * CodeMirror initialization
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    setCodeMirror: function() {
      var settings = this.settings
      var editor = this.editor
      if (settings.editorTheme !== "default") {
        editormd.loadCSS(
          settings.path + "codemirror/theme/" + settings.editorTheme
        )
      }
      var codeMirrorConfig = {
        mode: settings.mode,
        theme: settings.editorTheme,
        tabSize: settings.tabSize,
        dragDrop: false,
        autofocus: settings.autoFocus,
        autoCloseTags: settings.autoCloseTags,
        readOnly: settings.readOnly ? "nocursor" : false,
        indentUnit: settings.indentUnit,
        lineNumbers: settings.lineNumbers,
        lineWrapping: settings.lineWrapping,
        extraKeys: {
          "Ctrl-Q": function(cm) {
            cm.foldCode(cm.getCursor())
          }
        },
        foldGutter: settings.codeFold,
        gutters: ["CodeMirror-linenumbers", "CodeMirror-foldgutter"],
        matchBrackets: settings.matchBrackets,
        indentWithTabs: settings.indentWithTabs,
        styleActiveLine: settings.styleActiveLine,
        styleSelectedText: settings.styleSelectedText,
        autoCloseBrackets: settings.autoCloseBrackets,
        showTrailingSpace: settings.showTrailingSpace,
        highlightSelectionMatches: !settings.matchWordHighlight
          ? false
          : {
              showToken:
                settings.matchWordHighlight === "onselected" ? false : /\w/
            }
      }

      this.codeEditor = this.cm = editormd.$CodeMirror.fromTextArea(
        this.markdownTextarea[0],
        codeMirrorConfig
      )
      this.codeMirror = this.cmElement = editor.children(".CodeMirror")

      if (settings.value !== "") {
        this.cm.setValue(settings.value)
      }

      this.codeMirror.css({
        fontSize: settings.fontSize,
        width: !settings.watch ? "100%" : "50%"
      })

      if (settings.autoHeight) {
        this.codeMirror.css({
          height: "auto",
          minHeight: settings.minHeight,
          maxHeight: settings.maxHeight
        })
        this.codeMirror.find(".CodeMirror-gutters").css({
          minHeight: settings.minHeight
        })
        this.codeMirror.find(".CodeMirror-scroll").css({
          minHeight: settings.minHeight,
          maxHeight: settings.maxHeight
        })
        this.cm.setOption("viewportMargin", Infinity)
      }

      if (!settings.lineNumbers) {
        this.codeMirror.find(".CodeMirror-gutters").css("border-right", "none")
      }

      return this
    },

    /**
     * 获取CodeMirror的配置选项
     * Get CodeMirror setting options
     *
     * @returns {Mixed}                  return CodeMirror setting option value
     */

    getCodeMirrorOption: function(key) {
      return this.cm.getOption(key)
    },

    /**
     * 配置和重配置CodeMirror的选项
     * CodeMirror setting options / resettings
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    setCodeMirrorOption: function(key, value) {
      this.cm.setOption(key, value)

      return this
    },

    /**
     * 添加 CodeMirror 键盘快捷键
     * Add CodeMirror keyboard shortcuts key map
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    addKeyMap: function(map, bottom) {
      this.cm.addKeyMap(map, bottom)

      return this
    },

    /**
     * 移除 CodeMirror 键盘快捷键
     * Remove CodeMirror keyboard shortcuts key map
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    removeKeyMap: function(map) {
      this.cm.removeKeyMap(map)

      return this
    },

    /**
     * 跳转到指定的行
     * Goto CodeMirror line
     *
     * @param   {String|Intiger}   line      line number or "first"|"last"
     * @returns {editormd}                   返回editormd的实例对象
     */

    gotoLine: function(line) {
      var settings = this.settings
      if (!settings.gotoLine) {
        return this
      }
      var cm = this.cm
      var editor = this.editor
      var count = cm.lineCount()
      var preview = this.preview
      if (typeof line === "string") {
        if (line === "last") {
          line = count
        }
        if (line === "first") {
          line = 1
        }
      }
      if (typeof line !== "number") {
        alert("Error: The line number must be an integer.")
        return this
      }
      line = parseInt(line) - 1
      if (line > count) {
        alert("Error: The line number range 1-" + count)
        return this
      }
      cm.setCursor({ line: line, ch: 0 })
      var scrollInfo = cm.getScrollInfo()
      var clientHeight = scrollInfo.clientHeight
      var coords = cm.charCoords({ line: line, ch: 0 }, "local")
      cm.scrollTo(null, (coords.top + coords.bottom - clientHeight) / 2)
      if (settings.watch) {
        var cmScroll = this.codeMirror.find(".CodeMirror-scroll")[0]
        var height = $(cmScroll).height()
        var scrollTop = cmScroll.scrollTop
        var percent = scrollTop / cmScroll.scrollHeight
        if (scrollTop === 0) {
          preview.scrollTop(0)
        } else if (scrollTop + height >= cmScroll.scrollHeight - 16) {
          preview.scrollTop(preview[0].scrollHeight)
        } else {
          preview.scrollTop(preview[0].scrollHeight * percent)
        }
      }
      cm.focus()
      return this
    },

    /**
     * 扩展当前实例对象，可同时设置多个或者只设置一个
     * Extend editormd instance object, can mutil setting.
     *
     * @returns {editormd}                  this(editormd instance object.)
     */

    extend: function() {
      if (typeof arguments[1] !== "undefined") {
        if (typeof arguments[1] === "function") {
          arguments[1] = $.proxy(arguments[1], this)
        }
        this[arguments[0]] = arguments[1]
      }
      if (
        typeof arguments[0] === "object" &&
        typeof arguments[0].length === "undefined"
      ) {
        $.extend(true, this, arguments[0])
      }
      return this
    },

    /**
     * 设置或扩展当前实例对象，单个设置
     * Extend editormd instance object, one by one
     *
     * @param   {String|Object}   key       option key
     * @param   {String|Object}   value     option value
     * @returns {editormd}                  this(editormd instance object.)
     */

    set: function(key, value) {
      if (typeof value !== "undefined" && typeof value === "function") {
        value = $.proxy(value, this)
      }
      this[key] = value
      return this
    },

    /**
     * 重新配置
     * Resetting editor options
     *
     * @param   {String|Object}   key       option key
     * @param   {String|Object}   value     option value
     * @returns {editormd}                  this(editormd instance object.)
     */

    config: function(key, value) {
      var settings = this.settings
      if (typeof key === "object") {
        settings = $.extend(true, settings, key)
      }
      if (typeof key === "string") {
        settings[key] = value
      }
      this.settings = settings
      this.recreate()
      return this
    },

    /**
     * 注册事件处理方法
     * Bind editor event handle
     *
     * @param   {String}     eventType      event type
     * @param   {Function}   callback       回调函数
     * @returns {editormd}                  this(editormd instance object.)
     */

    on: function(eventType, callback) {
      var settings = this.settings
      if (typeof settings["on" + eventType] !== "undefined") {
        settings["on" + eventType] = $.proxy(callback, this)
      }
      return this
    },

    /**
     * 解除事件处理方法
     * Unbind editor event handle
     *
     * @param   {String}   eventType          event type
     * @returns {editormd}                    this(editormd instance object.)
     */

    off: function(eventType) {
      var settings = this.settings
      if (typeof settings["on" + eventType] !== "undefined") {
        settings["on" + eventType] = function() {}
      }
      return this
    },

    /**
     * 显示工具栏
     * Display toolbar
     *
     * @param   {Function} [callback=function(){}] 回调函数
     * @returns {editormd}  返回editormd的实例对象
     */

    showToolbar: function(callback) {
      var settings = this.settings
      if (settings.readOnly) {
        return this
      }
      if (
        settings.toolbar &&
        (this.toolbar.length < 1 ||
          this.toolbar.find("." + this.classPrefix + "menu").html() === "")
      ) {
        this.setToolbar()
      }
      settings.toolbar = true
      this.toolbar.show()
      this.resize()
      $.proxy(callback || function() {}, this)()
      return this
    },

    /**
     * 隐藏工具栏
     * Hide toolbar
     *
     * @param   {Function} [callback=function(){}] 回调函数
     * @returns {editormd}                         this(editormd instance object.)
     */

    hideToolbar: function(callback) {
      var settings = this.settings
      settings.toolbar = false
      this.toolbar.hide()
      this.resize()
      $.proxy(callback || function() {}, this)()
      return this
    },

    /**
     * 页面滚动时工具栏的固定定位
     * Set toolbar in window scroll auto fixed position
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    setToolbarAutoFixed: function(fixed) {
      var state = this.state
      var editor = this.editor
      var toolbar = this.toolbar
      var settings = this.settings
      if (typeof fixed !== "undefined") {
        settings.toolbarAutoFixed = fixed
      }
      var autoFixedHandle = function() {
        var $window = $(window)
        var top = $window.scrollTop()
        if (!settings.toolbarAutoFixed) {
          return false
        }
        if (top - editor.offset().top > 10 && top < editor.height()) {
          toolbar.css({
            position: "fixed",
            width: editor.width() + "px",
            left: ($window.width() - editor.width()) / 2 + "px"
          })
        } else {
          toolbar.css({
            position: "absolute",
            width: "100%",
            left: 0
          })
        }
      }
      if (
        !state.fullscreen &&
        !state.preview &&
        settings.toolbar &&
        settings.toolbarAutoFixed
      ) {
        $(window).bind("scroll", autoFixedHandle)
      }
      return this
    },

    /**
     * 配置和初始化工具栏
     * Set toolbar and Initialization
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    setToolbar: function() {
      var settings = this.settings
      if (settings.readOnly) {
        return this
      }
      var editor = this.editor
      var preview = this.preview
      var classPrefix = this.classPrefix
      var toolbar = (this.toolbar = editor.children(
        "." + classPrefix + "toolbar"
      ))
      if (settings.toolbar && toolbar.length < 1) {
        var toolbarHTML =
          '<div class="' +
          classPrefix +
          'toolbar"><div class="' +
          classPrefix +
          'toolbar-container"><ul class="' +
          classPrefix +
          'menu"></ul></div></div>'
        editor.append(toolbarHTML)
        toolbar = this.toolbar = editor.children("." + classPrefix + "toolbar")
      }
      if (!settings.toolbar) {
        toolbar.hide()
        return this
      }
      toolbar.show()
      var icons =
        typeof settings.toolbarIcons === "function"
          ? settings.toolbarIcons()
          : typeof settings.toolbarIcons === "string"
            ? editormd.toolbarModes[settings.toolbarIcons]
            : settings.toolbarIcons
      var toolbarMenu = toolbar.find("." + this.classPrefix + "menu"),
        menu = ""
      var pullRight = false
      for (var i = 0, len = icons.length; i < len; i++) {
        var name = icons[i]
        if (name === "||") {
          pullRight = true
        } else if (name === "|") {
          menu += '<li class="divider" unselectable="on">|</li>'
        } else {
          var isHeader = /h(\d)/.test(name)
          var index = name
          if (name === "watch" && !settings.watch) {
            index = "unwatch"
          }
          var title = settings.lang.toolbar[index]
          var iconTexts = settings.toolbarIconTexts[index]
          var iconClass = settings.toolbarIconsClass[index]
          title = typeof title === "undefined" ? "" : title
          iconTexts = typeof iconTexts === "undefined" ? "" : iconTexts
          iconClass = typeof iconClass === "undefined" ? "" : iconClass
          var menuItem = pullRight ? '<li class="pull-right">' : "<li>"
          if (
            typeof settings.toolbarCustomIcons[name] !== "undefined" &&
            typeof settings.toolbarCustomIcons[name] !== "function"
          ) {
            menuItem += settings.toolbarCustomIcons[name]
          } else {
            menuItem +=
              '<a href="javascript:;" title="' + title + '" unselectable="on">'
            menuItem +=
              '<i class="fa ' +
              iconClass +
              '" name="' +
              name +
              '" unselectable="on">' +
              (isHeader
                ? name.toUpperCase()
                : iconClass === "" ? iconTexts : "") +
              "</i>"
            menuItem += "</a>"
          }
          menuItem += "</li>"
          menu = pullRight ? menuItem + menu : menu + menuItem
        }
      }
      toolbarMenu.html(menu)
      toolbarMenu
        .find('[title="Lowercase"]')
        .attr("title", settings.lang.toolbar.lowercase)
      toolbarMenu
        .find('[title="ucwords"]')
        .attr("title", settings.lang.toolbar.ucwords)
      this.setToolbarHandler()
      this.setToolbarAutoFixed()
      return this
    },

    /**
     * 工具栏图标事件处理对象序列
     * Get toolbar icons event handlers
     *
     * @param   {Object}   cm    CodeMirror的实例对象
     * @param   {String}   name  要获取的事件处理器名称
     * @returns {Object}         返回处理对象序列
     */

    dialogLockScreen: function() {
      $.proxy(editormd.dialogLockScreen, this)()
      return this
    },
    dialogShowMask: function(dialog) {
      $.proxy(editormd.dialogShowMask, this)(dialog)
      return this
    },
    getToolbarHandles: function(name) {
      var toolbarHandlers = (this.toolbarHandlers = editormd.toolbarHandlers)
      return name && typeof toolbarIconHandlers[name] !== "undefined"
        ? toolbarHandlers[name]
        : toolbarHandlers
    },

    /**
     * 工具栏图标事件处理器
     * Bind toolbar icons event handle
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    setToolbarHandler: function() {
      var _this = this
      var settings = this.settings
      if (!settings.toolbar || settings.readOnly) {
        return this
      }
      var toolbar = this.toolbar
      var cm = this.cm
      var classPrefix = this.classPrefix
      var toolbarIcons = (this.toolbarIcons = toolbar.find(
        "." + classPrefix + "menu > li > a"
      ))
      var toolbarIconHandlers = this.getToolbarHandles()
      toolbarIcons.bind(editormd.mouseOrTouch("click", "touchend"), function(
        event
      ) {
        var icon = $(this).children(".fa")
        var name = icon.attr("name")
        var cursor = cm.getCursor()
        var selection = cm.getSelection()
        if (name === "") {
          return
        }
        _this.activeIcon = icon
        if (typeof toolbarIconHandlers[name] !== "undefined") {
          $.proxy(toolbarIconHandlers[name], _this)(cm)
        } else {
          if (typeof settings.toolbarHandlers[name] !== "undefined") {
            $.proxy(settings.toolbarHandlers[name], _this)(
              cm,
              icon,
              cursor,
              selection
            )
          }
        }
        if (
          name !== "link" &&
          name !== "reference-link" &&
          name !== "image" &&
          name !== "code-block" &&
          name !== "preformatted-text" &&
          name !== "watch" &&
          name !== "preview" &&
          name !== "search" &&
          name !== "fullscreen" &&
          name !== "info"
        ) {
          cm.focus()
        }
        return false
      })

      return this
    },

    /**
     * 动态创建对话框
     * Creating custom dialogs
     *
     * @param   {Object} options  配置项键值对 Key/Value
     * @returns {dialog}          返回创建的dialog的jQuery实例对象
     */

    createDialog: function(options) {
      return $.proxy(editormd.createDialog, this)(options)
    },

    /**
     * 创建关于Editor.md的对话框
     * Create about Editor.md dialog
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    createInfoDialog: function() {
      var _this = this
      var editor = this.editor
      var classPrefix = this.classPrefix
      var infoDialogHTML = [
        '<div class="' +
          classPrefix +
          "dialog " +
          classPrefix +
          'dialog-info" style="">',
        '<div class="' + classPrefix + 'dialog-container">',
        '<h1><i class="editormd-logo editormd-logo-lg editormd-logo-color"></i> ' +
          editormd.title +
          "<small>v" +
          editormd.version +
          "</small></h1>",
        "<p>" + this.lang.description + "</p>",
        '<p style="margin: 10px 0 20px 0;"><a href="' +
          editormd.homePage +
          '" target="_blank">' +
          editormd.homePage +
          ' <i class="fa fa-external-link"></i></a></p>',
        '<p style="font-size: 0.85em;">Copyright &copy; 2015 <a href="https://github.com/pandao" target="_blank" class="hover-link">Pandao</a>, The <a href="https://github.com/pandao/editor.md/blob/master/LICENSE" target="_blank" class="hover-link">MIT</a> License.</p>',
        "</div>",
        '<a href="javascript:;" class="fa fa-close ' +
          classPrefix +
          'dialog-close"></a>',
        "</div>"
      ].join("\n")
      editor.append(infoDialogHTML)
      var infoDialog = (this.infoDialog = editor.children(
        "." + classPrefix + "dialog-info"
      ))
      infoDialog
        .find("." + classPrefix + "dialog-close")
        .bind(editormd.mouseOrTouch("click", "touchend"), function() {
          _this.hideInfoDialog()
        })
      infoDialog
        .css("border", editormd.isIE8 ? "1px solid #ddd" : "")
        .css("z-index", editormd.dialogZindex)
        .show()
      this.infoDialogPosition()
      return this
    },

    /**
     * 关于Editor.md对话居中定位
     * Editor.md dialog position handle
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    infoDialogPosition: function() {
      var infoDialog = this.infoDialog
      var _infoDialogPosition = function() {
        infoDialog.css({
          top: ($(window).height() - infoDialog.height()) / 2 + "px",
          left: ($(window).width() - infoDialog.width()) / 2 + "px"
        })
      }
      _infoDialogPosition()
      $(window).resize(_infoDialogPosition)
      return this
    },

    /**
     * 显示关于Editor.md
     * Display about Editor.md dialog
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    showInfoDialog: function() {
      $("html,body").css("overflow-x", "hidden")
      var _this = this
      var editor = this.editor
      var settings = this.settings
      var infoDialog = (this.infoDialog = editor.children(
        "." + this.classPrefix + "dialog-info"
      ))
      if (infoDialog.length < 1) {
        this.createInfoDialog()
      }
      this.lockScreen(true)
      this.mask
        .css({
          opacity: settings.dialogMaskOpacity,
          backgroundColor: settings.dialogMaskBgColor
        })
        .show()
      infoDialog.css("z-index", editormd.dialogZindex).show()
      this.infoDialogPosition()
      return this
    },

    /**
     * 隐藏关于Editor.md
     * Hide about Editor.md dialog
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    hideInfoDialog: function() {
      $("html,body").css("overflow-x", "")
      this.infoDialog.hide()
      this.mask.hide()
      this.lockScreen(false)
      return this
    },

    /**
     * 锁屏
     * lock screen
     *
     * @param   {Boolean}    lock    Boolean 布尔值，是否锁屏
     * @returns {editormd}           返回editormd的实例对象
     */

    lockScreen: function(lock) {
      editormd.lockScreen(lock)
      this.resize()
      return this
    },

    /**
     * 编辑器界面重建，用于动态语言包或模块加载等
     * Recreate editor
     *
     * @returns {editormd}  返回editormd的实例对象
     */

    recreate: function() {
      var _this = this
      var editor = this.editor
      var settings = this.settings
      this.codeMirror.remove()
      this.setCodeMirror()
      if (!settings.readOnly) {
        if (editor.find(".editormd-dialog").length > 0) {
          editor.find(".editormd-dialog").remove()
        }
        if (settings.toolbar) {
          this.getToolbarHandles()
          this.setToolbar()
        }
      }
      this.loadedDisplay(true)
      return this
    },

    /**
     * 高亮预览HTML的pre代码部分
     * highlight of preview codes
     *
     * @returns {editormd}             返回editormd的实例对象
     */

    previewCodeHighlight: function() {
      var settings = this.settings
      var previewContainer = this.previewContainer
      if (settings.previewCodeHighlight) {
        previewContainer.find("pre").addClass("prettyprint linenums")
        if (typeof prettyPrint !== "undefined") {
          prettyPrint()
        }
      }

      return this
    },

    /**
     * 解析TeX(KaTeX)科学公式
     * TeX(KaTeX) Renderer
     *
     * @returns {editormd}             返回editormd的实例对象
     */

    katexRender: function() {
      if (timer === null) {
        return this
      }
      this.previewContainer
        .find("." + editormd.classNames.tex)
        .each(function() {
          var tex = $(this)
          editormd.$katex.render(tex.text(), tex[0])
          tex.find(".katex").css("font-size", "1.6em")
        })
      return this
    },

    /**
     * 解析和渲染流程图及时序图
     * FlowChart and SequenceDiagram Renderer
     *
     * @returns {editormd}             返回editormd的实例对象
     */

    flowChartAndSequenceDiagramRender: function() {
      var $this = this
      var settings = this.settings
      var previewContainer = this.previewContainer
      if (editormd.isIE8) {
        return this
      }
      if (settings.flowChart) {
        if (flowchartTimer === null) {
          return this
        }
        previewContainer.find(".flowchart").flowChart()
      }

      if (settings.sequenceDiagram) {
        previewContainer
          .find(".sequence-diagram")
          .sequenceDiagram({ theme: "simple" })
      }
      var preview = $this.preview
      var codeMirror = $this.codeMirror
      var codeView = codeMirror.find(".CodeMirror-scroll")
      var height = codeView.height()
      var scrollTop = codeView.scrollTop()
      var percent = scrollTop / codeView[0].scrollHeight
      var tocHeight = 0
      preview.find(".markdown-toc-list").each(function() {
        tocHeight += $(this).height()
      })
      var tocMenuHeight = preview.find(".editormd-toc-menu").height()
      tocMenuHeight = !tocMenuHeight ? 0 : tocMenuHeight
      if (settings.syncScrolling) {
        if (scrollTop === 0) {
          preview.scrollTop(0)
        } else if (scrollTop + height >= codeView[0].scrollHeight - 16) {
          preview.scrollTop(preview[0].scrollHeight)
        } else {
          preview.scrollTop(
            (preview[0].scrollHeight + tocHeight + tocMenuHeight) * percent
          )
        }
      }
      return this
    },

    /**
     * 注册键盘快捷键处理
     * Register CodeMirror keyMaps (keyboard shortcuts).
     *
     * @param   {Object}    keyMap      KeyMap key/value {"(Ctrl/Shift/Alt)-Key" : function(){}}
     * @returns {editormd}              return this
     */

    registerKeyMaps: function(keyMap) {
      var _this = this
      var cm = this.cm
      var settings = this.settings
      var toolbarHandlers = editormd.toolbarHandlers
      var disabledKeyMaps = settings.disabledKeyMaps
      keyMap = keyMap || null
      if (keyMap) {
        for (var i in keyMap) {
          if ($.inArray(i, disabledKeyMaps) < 0) {
            var map = {}
            map[i] = keyMap[i]
            cm.addKeyMap(keyMap)
          }
        }
      } else {
        for (var k in editormd.keyMaps) {
          var _keyMap = editormd.keyMaps[k]
          var handle =
            typeof _keyMap === "string"
              ? $.proxy(toolbarHandlers[_keyMap], _this)
              : $.proxy(_keyMap, _this)
          if (
            $.inArray(k, ["F9", "F10", "F11"]) < 0 &&
            $.inArray(k, disabledKeyMaps) < 0
          ) {
            var _map = {}
            _map[k] = handle
            cm.addKeyMap(_map)
          }
        }
        $(window).keydown(function(event) {
          var keymaps = {
            "120": "F9",
            "121": "F10",
            "122": "F11"
          }
          if ($.inArray(keymaps[event.keyCode], disabledKeyMaps) < 0) {
            switch (event.keyCode) {
              case 120:
                $.proxy(toolbarHandlers.watch, _this)()
                return false
              case 121:
                $.proxy(toolbarHandlers.preview, _this)()
                return false
              case 122:
                $.proxy(toolbarHandlers.fullscreen, _this)()
                return false
              default:
                break
            }
          }
        })
      }
      return this
    },

    /**
     * 绑定同步滚动
     * @returns {editormd} return this
     */

    bindScrollEvent: function() {
      var _this = this
      var preview = this.preview
      var settings = this.settings
      var codeMirror = this.codeMirror
      var mouseOrTouch = editormd.mouseOrTouch
      if (!settings.syncScrolling) {
        return this
      }
      var cmBindScroll = function() {
        codeMirror
          .find(".CodeMirror-scroll")
          .bind(mouseOrTouch("scroll", "touchmove"), function(event) {
            var height = $(this).height()
            var scrollTop = $(this).scrollTop()
            var percent = scrollTop / $(this)[0].scrollHeight
            var tocHeight = 0
            preview.find(".markdown-toc-list").each(function() {
              tocHeight += $(this).height()
            })
            var tocMenuHeight = preview.find(".editormd-toc-menu").height()
            tocMenuHeight = !tocMenuHeight ? 0 : tocMenuHeight
            if (scrollTop === 0) {
              preview.scrollTop(0)
            } else if (scrollTop + height >= $(this)[0].scrollHeight - 16) {
              preview.scrollTop(preview[0].scrollHeight)
            } else {
              preview.scrollTop(
                (preview[0].scrollHeight + tocHeight + tocMenuHeight) * percent
              )
            }
            $.proxy(settings.onscroll, _this)(event)
          })
      }
      var cmUnbindScroll = function() {
        codeMirror
          .find(".CodeMirror-scroll")
          .unbind(mouseOrTouch("scroll", "touchmove"))
      }
      var previewBindScroll = function() {
        preview.bind(mouseOrTouch("scroll", "touchmove"), function(event) {
          var height = $(this).height()
          var scrollTop = $(this).scrollTop()
          var percent = scrollTop / $(this)[0].scrollHeight
          var codeView = codeMirror.find(".CodeMirror-scroll")
          if (scrollTop === 0) {
            codeView.scrollTop(0)
          } else if (scrollTop + height >= $(this)[0].scrollHeight) {
            codeView.scrollTop(codeView[0].scrollHeight)
          } else {
            codeView.scrollTop(codeView[0].scrollHeight * percent)
          }
          $.proxy(settings.onpreviewscroll, _this)(event)
        })
      }

      var previewUnbindScroll = function() {
        preview.unbind(mouseOrTouch("scroll", "touchmove"))
      }
      codeMirror.bind({
        mouseover: cmBindScroll,
        mouseout: cmUnbindScroll,
        touchstart: cmBindScroll,
        touchend: cmUnbindScroll
      })
      if (settings.syncScrolling === "single") {
        return this
      }
      preview.bind({
        mouseover: previewBindScroll,
        mouseout: previewUnbindScroll,
        touchstart: previewBindScroll,
        touchend: previewUnbindScroll
      })
      return this
    },

    bindChangeEvent: function() {
      var _this = this
      var cm = this.cm
      var settings = this.settings

      // if (!settings.syncScrolling) {
      //     return this;
      // }

      cm.on("change", function(_cm, changeObj) {
        if (settings.watch) {
          _this.previewContainer.css(
            "padding",
            settings.autoHeight ? "20px 20px 50px 40px" : "20px"
          )
        }
        timer = setTimeout(function() {
          clearTimeout(timer)
          _this.save()
          timer = null
        }, settings.delay)
      })
      return this
    },

    /**
     * 加载队列完成之后的显示处理
     * Display handle of the module queues loaded after.
     *
     * @param   {Boolean}   recreate   是否为重建编辑器
     * @returns {editormd}             返回editormd的实例对象
     */

    loadedDisplay: function(recreate) {
      recreate = recreate || false
      var _this = this
      var editor = this.editor
      var preview = this.preview
      var settings = this.settings
      this.containerMask.hide()
      this.save()
      if (settings.watch) {
        preview.show()
      }
      editor.data("oldWidth", editor.width()).data("oldHeight", editor.height()) // 为了兼容Zepto
      this.resize()
      this.registerKeyMaps()
      $(window).resize(function() {
        _this.resize()
      })
      this.bindScrollEvent().bindChangeEvent()
      if (!recreate) {
        $.proxy(settings.onload, this)()
      }
      this.state.loaded = true
      return this
    },

    /**
     * 设置编辑器的宽度
     * Set editor width
     *
     * @param   {Number|String} width  编辑器宽度值
     * @returns {editormd}             返回editormd的实例对象
     */

    width: function(width) {
      this.editor.css("width", typeof width === "number" ? width + "px" : width)
      this.resize()
      return this
    },

    /**
     * 设置编辑器的高度
     * Set editor height
     *
     * @param   {Number|String} height  编辑器高度值
     * @returns {editormd}              返回editormd的实例对象
     */

    height: function(height) {
      this.editor.css(
        "height",
        typeof height === "number" ? height + "px" : height
      )
      this.resize()
      return this
    },

    /**
     * 调整编辑器的尺寸和布局
     * Resize editor layout
     *
     * @param   {Number|String} [width=null]  编辑器宽度值
     * @param   {Number|String} [height=null] 编辑器高度值
     * @returns {editormd}                    返回editormd的实例对象
     */

    resize: function(width, height) {
      width = width || null
      height = height || null
      var state = this.state
      var editor = this.editor
      var preview = this.preview
      var toolbar = this.toolbar
      var settings = this.settings
      var codeMirror = this.codeMirror
      if (width) {
        editor.css("width", typeof width === "number" ? width + "px" : width)
      }
      if (settings.autoHeight && !state.fullscreen && !state.preview) {
        editor.css({
          height: "auto",
          minHeight: settings.minHeight
        })
        codeMirror.css({
          height: "auto",
          minHeight: settings.minHeight,
          maxHeight: settings.maxHeight
        })
      } else {
        if (height) {
          editor.css(
            "height",
            typeof height === "number" ? height + "px" : height
          )
        }
        if (state.fullscreen) {
          editor.height($(window).height())
        }
        if (settings.toolbar && !settings.readOnly) {
          codeMirror
            .css("margin-top", toolbar.height() + 1)
            .height(editor.height() - toolbar.height())
        } else {
          codeMirror.css("margin-top", 0).height(editor.height())
        }
      }
      if (settings.watch) {
        codeMirror.width(editor.width() / 2)
        preview.width(!state.preview ? editor.width() / 2 : editor.width())
        this.previewContainer.css(
          "padding",
          settings.autoHeight ? "20px 20px 50px 40px" : "20px"
        )
        if (settings.toolbar && !settings.readOnly) {
          preview.css("top", toolbar.height() + 1)
        } else {
          preview.css("top", 0)
        }
        if (settings.autoHeight && !state.fullscreen && !state.preview) {
          preview.height("")
        } else {
          var previewHeight =
            settings.toolbar && !settings.readOnly
              ? editor.height() - toolbar.height()
              : editor.height()
          preview.height(previewHeight)
        }
      } else {
        codeMirror.width(editor.width())
        preview.hide()
      }
      if (state.loaded) {
        $.proxy(settings.onresize, this)()
      }
      return this
    },

    /**
     * 解析和保存Markdown代码
     * Parse & Saving Markdown source code
     *
     * @returns {editormd}     返回editormd的实例对象
     */

    save: function() {
      if (timer === null) {
        return this
      }
      var _this = this
      var state = this.state
      var settings = this.settings
      var cm = this.cm
      var cmValue = cm.getValue()
      var previewContainer = this.previewContainer
      if (settings.mode !== "gfm" && settings.mode !== "markdown") {
        this.markdownTextarea.val(cmValue)
        return this
      }
      var marked = editormd.$marked
      var markdownToC = (this.markdownToC = [])
      var rendererOptions = (this.markedRendererOptions = {
        toc: settings.toc,
        tocm: settings.tocm,
        tocStartLevel: settings.tocStartLevel,
        pageBreak: settings.pageBreak,
        taskList: settings.taskList,
        emoji: settings.emoji,
        tex: settings.tex,
        atLink: settings.atLink, // for @link
        emailLink: settings.emailLink, // for mail address auto link
        flowChart: settings.flowChart,
        sequenceDiagram: settings.sequenceDiagram,
        previewCodeHighlight: settings.previewCodeHighlight
      })
      var markedOptions = (this.markedOptions = {
        renderer: editormd.markedRenderer(markdownToC, rendererOptions),
        gfm: true,
        tables: true,
        breaks: true,
        pedantic: false,
        sanitize: settings.htmlDecode ? false : true, // 关闭忽略HTML标签，即开启识别HTML标签，默认为false
        smartLists: true,
        smartypants: true
      })
      marked.setOptions(markedOptions)
      var newMarkdownDoc = editormd.$marked(cmValue, markedOptions)
      newMarkdownDoc = editormd.filterHTMLTags(
        newMarkdownDoc,
        settings.htmlDecode
      )
      this.markdownTextarea.text(cmValue)
      cm.save()
      if (settings.saveHTMLToTextarea) {
        this.htmlTextarea.text(newMarkdownDoc)
      }
      if (settings.watch || (!settings.watch && state.preview)) {
        previewContainer.html(newMarkdownDoc)
        this.previewCodeHighlight()
        if (settings.toc) {
          var tocContainer =
            settings.tocContainer === ""
              ? previewContainer
              : $(settings.tocContainer)
          var tocMenu = tocContainer.find("." + this.classPrefix + "toc-menu")
          tocContainer.attr(
            "previewContainer",
            settings.tocContainer === "" ? "true" : "false"
          )
          if (settings.tocContainer !== "" && tocMenu.length > 0) {
            tocMenu.remove()
          }
          editormd.markdownToCRenderer(
            markdownToC,
            tocContainer,
            settings.tocDropdown,
            settings.tocStartLevel
          )
          if (
            settings.tocDropdown ||
            tocContainer.find("." + this.classPrefix + "toc-menu").length > 0
          ) {
            editormd.tocDropdownMenu(
              tocContainer,
              settings.tocTitle !== "" ? settings.tocTitle : this.lang.tocTitle
            )
          }
          if (settings.tocContainer !== "") {
            previewContainer.find(".markdown-toc").css("border", "none")
          }
        }
        if (settings.tex) {
          if (!editormd.kaTeXLoaded && settings.autoLoadModules) {
            editormd.loadKaTeX(function() {
              editormd.$katex = katex
              editormd.kaTeXLoaded = true
              _this.katexRender()
            })
          } else {
            editormd.$katex = katex
            this.katexRender()
          }
        }
        if (settings.flowChart || settings.sequenceDiagram) {
          flowchartTimer = setTimeout(function() {
            clearTimeout(flowchartTimer)
            _this.flowChartAndSequenceDiagramRender()
            flowchartTimer = null
          }, 10)
        }
        if (state.loaded) {
          $.proxy(settings.onchange, this)()
        }
      }
      return this
    },

    /**
     * 聚焦光标位置
     * Focusing the cursor position
     *
     * @returns {editormd}         返回editormd的实例对象
     */

    focus: function() {
      this.cm.focus()
      return this
    },

    /**
     * 设置光标的位置
     * Set cursor position
     *
     * @param   {Object}    cursor 要设置的光标位置键值对象，例：{line:1, ch:0}
     * @returns {editormd}         返回editormd的实例对象
     */

    setCursor: function(cursor) {
      this.cm.setCursor(cursor)
      return this
    },

    /**
     * 获取当前光标的位置
     * Get the current position of the cursor
     *
     * @returns {Cursor}         返回一个光标Cursor对象
     */

    getCursor: function() {
      return this.cm.getCursor()
    },

    /**
     * 设置光标选中的范围
     * Set cursor selected ranges
     *
     * @param   {Object}    from   开始位置的光标键值对象，例：{line:1, ch:0}
     * @param   {Object}    to     结束位置的光标键值对象，例：{line:1, ch:0}
     * @returns {editormd}         返回editormd的实例对象
     */

    setSelection: function(from, to) {
      this.cm.setSelection(from, to)
      return this
    },

    /**
     * 获取光标选中的文本
     * Get the texts from cursor selected
     *
     * @returns {String}         返回选中文本的字符串形式
     */

    getSelection: function() {
      return this.cm.getSelection()
    },

    /**
     * 设置光标选中的文本范围
     * Set the cursor selection ranges
     *
     * @param   {Array}    ranges  cursor selection ranges array
     * @returns {Array}            return this
     */

    setSelections: function(ranges) {
      this.cm.setSelections(ranges)
      return this
    },

    /**
     * 获取光标选中的文本范围
     * Get the cursor selection ranges
     *
     * @returns {Array}         return selection ranges array
     */

    getSelections: function() {
      return this.cm.getSelections()
    },

    /**
     * 替换当前光标选中的文本或在当前光标处插入新字符
     * Replace the text at the current cursor selected or insert a new character at the current cursor position
     *
     * @param   {String}    value  要插入的字符值
     * @returns {editormd}         返回editormd的实例对象
     */

    replaceSelection: function(value) {
      this.cm.replaceSelection(value)
      return this
    },

    /**
     * 在当前光标处插入新字符
     * Insert a new character at the current cursor position
     *
     * 同replaceSelection()方法
     * With the replaceSelection() method
     *
     * @param   {String}    value  要插入的字符值
     * @returns {editormd}         返回editormd的实例对象
     */

    insertValue: function(value) {
      this.replaceSelection(value)
      return this
    },

    /**
     * 追加markdown
     * append Markdown to editor
     *
     * @param   {String}    md     要追加的markdown源文档
     * @returns {editormd}         返回editormd的实例对象
     */

    appendMarkdown: function(md) {
      var settings = this.settings
      var cm = this.cm
      cm.setValue(cm.getValue() + md)
      return this
    },

    /**
     * 设置和传入编辑器的markdown源文档
     * Set Markdown source document
     *
     * @param   {String}    md     要传入的markdown源文档
     * @returns {editormd}         返回editormd的实例对象
     */

    setMarkdown: function(md) {
      this.cm.setValue(md || this.settings.markdown)
      return this
    },

    /**
     * 获取编辑器的markdown源文档
     * Set Editor.md markdown/CodeMirror value
     *
     * @returns {editormd}         返回editormd的实例对象
     */

    getMarkdown: function() {
      return this.cm.getValue()
    },

    /**
     * 获取编辑器的源文档
     * Get CodeMirror value
     *
     * @returns {editormd}         返回editormd的实例对象
     */

    getValue: function() {
      return this.cm.getValue()
    },

    /**
     * 设置编辑器的源文档
     * Set CodeMirror value
     *
     * @param   {String}     value   set code/value/string/text
     * @returns {editormd}           返回editormd的实例对象
     */

    setValue: function(value) {
      this.cm.setValue(value)
      return this
    },

    /**
     * 清空编辑器
     * Empty CodeMirror editor container
     *
     * @returns {editormd}         返回editormd的实例对象
     */

    clear: function() {
      this.cm.setValue("")
      return this
    },

    /**
     * 获取解析后存放在Textarea的HTML源码
     * Get parsed html code from Textarea
     *
     * @returns {String}               返回HTML源码
     */

    getHTML: function() {
      if (!this.settings.saveHTMLToTextarea) {
        alert("Error: settings.saveHTMLToTextarea == false")
        return false
      }
      return this.htmlTextarea.val()
    },

    /**
     * getHTML()的别名
     * getHTML (alias)
     *
     * @returns {String}           Return html code 返回HTML源码
     */

    getTextareaSavedHTML: function() {
      return this.getHTML()
    },

    /**
     * 获取预览窗口的HTML源码
     * Get html from preview container
     *
     * @returns {editormd}         返回editormd的实例对象
     */

    getPreviewedHTML: function() {
      if (!this.settings.watch) {
        alert("Error: settings.watch == false")
        return false
      }
      return this.previewContainer.html()
    },

    /**
     * 开启实时预览
     * Enable real-time watching
     *
     * @returns {editormd}         返回editormd的实例对象
     */

    watch: function(callback) {
      var settings = this.settings
      if ($.inArray(settings.mode, ["gfm", "markdown"]) < 0) {
        return this
      }
      this.state.watching = settings.watch = true
      this.preview.show()
      if (this.toolbar) {
        var watchIcon = settings.toolbarIconsClass.watch
        var unWatchIcon = settings.toolbarIconsClass.unwatch
        var icon = this.toolbar.find(".fa[name=watch]")
        icon.parent().attr("title", settings.lang.toolbar.watch)
        icon.removeClass(unWatchIcon).addClass(watchIcon)
      }
      this.codeMirror
        .css("border-right", "1px solid #ddd")
        .width(this.editor.width() / 2)
      timer = 0
      this.save().resize()
      if (!settings.onwatch) {
        settings.onwatch = callback || function() {}
      }
      $.proxy(settings.onwatch, this)()
      return this
    },

    /**
     * 关闭实时预览
     * Disable real-time watching
     *
     * @returns {editormd}         返回editormd的实例对象
     */

    unwatch: function(callback) {
      var settings = this.settings
      this.state.watching = settings.watch = false
      this.preview.hide()
      if (this.toolbar) {
        var watchIcon = settings.toolbarIconsClass.watch
        var unWatchIcon = settings.toolbarIconsClass.unwatch
        var icon = this.toolbar.find(".fa[name=watch]")
        icon.parent().attr("title", settings.lang.toolbar.unwatch)
        icon.removeClass(watchIcon).addClass(unWatchIcon)
      }
      this.codeMirror.css("border-right", "none").width(this.editor.width())
      this.resize()
      if (!settings.onunwatch) {
        settings.onunwatch = callback || function() {}
      }
      $.proxy(settings.onunwatch, this)()
      return this
    },

    /**
     * 显示编辑器
     * Show editor
     *
     * @param   {Function} [callback=function()] 回调函数
     * @returns {editormd}                       返回editormd的实例对象
     */

    show: function(callback) {
      callback = callback || function() {}
      var _this = this
      this.editor.show(0, function() {
        $.proxy(callback, _this)()
      })
      return this
    },

    /**
     * 隐藏编辑器
     * Hide editor
     *
     * @param   {Function} [callback=function()] 回调函数
     * @returns {editormd}                       返回editormd的实例对象
     */

    hide: function(callback) {
      callback = callback || function() {}
      var _this = this
      this.editor.hide(0, function() {
        $.proxy(callback, _this)()
      })
      return this
    },

    /**
     * 隐藏编辑器部分，只预览HTML
     * Enter preview html state
     *
     * @returns {editormd}         返回editormd的实例对象
     */

    previewing: function() {
      var _this = this
      var editor = this.editor
      var preview = this.preview
      var toolbar = this.toolbar
      var settings = this.settings
      var codeMirror = this.codeMirror
      var previewContainer = this.previewContainer
      if ($.inArray(settings.mode, ["gfm", "markdown"]) < 0) {
        return this
      }
      if (settings.toolbar && toolbar) {
        toolbar.toggle()
        toolbar.find(".fa[name=preview]").toggleClass("active")
      }
      codeMirror.toggle()
      var escHandle = function(event) {
        if (event.shiftKey && event.keyCode === 27) {
          _this.previewed()
        }
      }
      if (codeMirror.css("display") === "none") {
        // 为了兼容Zepto，而不使用codeMirror.is(":hidden")
        this.state.preview = true
        if (this.state.fullscreen) {
          preview.css("background", "#fff")
        }
        editor
          .find("." + this.classPrefix + "preview-close-btn")
          .show()
          .bind(editormd.mouseOrTouch("click", "touchend"), function() {
            _this.previewed()
          })
        if (!settings.watch) {
          this.save()
        } else {
          previewContainer.css("padding", "")
        }
        previewContainer.addClass(this.classPrefix + "preview-active")
        preview.show().css({
          position: "",
          top: 0,
          width: editor.width(),
          height:
            settings.autoHeight && !this.state.fullscreen
              ? "auto"
              : editor.height()
        })
        if (this.state.loaded) {
          $.proxy(settings.onpreviewing, this)()
        }
        $(window).bind("keyup", escHandle)
      } else {
        $(window).unbind("keyup", escHandle)
        this.previewed()
      }
    },

    /**
     * 显示编辑器部分，退出只预览HTML
     * Exit preview html state
     *
     * @returns {editormd}         返回editormd的实例对象
     */

    previewed: function() {
      var editor = this.editor
      var preview = this.preview
      var toolbar = this.toolbar
      var settings = this.settings
      var previewContainer = this.previewContainer
      var previewCloseBtn = editor.find(
        "." + this.classPrefix + "preview-close-btn"
      )
      this.state.preview = false
      this.codeMirror.show()
      if (settings.toolbar) {
        toolbar.show()
      }
      preview[settings.watch ? "show" : "hide"]()
      previewCloseBtn.hide().unbind(editormd.mouseOrTouch("click", "touchend"))
      previewContainer.removeClass(this.classPrefix + "preview-active")
      if (settings.watch) {
        previewContainer.css("padding", "20px")
      }
      preview.css({
        background: null,
        position: "absolute",
        width: editor.width() / 2,
        height:
          settings.autoHeight && !this.state.fullscreen
            ? "auto"
            : editor.height() - toolbar.height(),
        top: settings.toolbar ? toolbar.height() : 0
      })
      if (this.state.loaded) {
        $.proxy(settings.onpreviewed, this)()
      }
      return this
    },

    /**
     * 编辑器全屏显示
     * Fullscreen show
     *
     * @returns {editormd}         返回editormd的实例对象
     */

    fullscreen: function() {
      var _this = this
      var state = this.state
      var editor = this.editor
      var preview = this.preview
      var toolbar = this.toolbar
      var settings = this.settings
      var fullscreenClass = this.classPrefix + "fullscreen"
      if (toolbar) {
        toolbar
          .find(".fa[name=fullscreen]")
          .parent()
          .toggleClass("active")
      }
      var escHandle = function(event) {
        if (!event.shiftKey && event.keyCode === 27) {
          if (state.fullscreen) {
            _this.fullscreenExit()
          }
        }
      }
      if (!editor.hasClass(fullscreenClass)) {
        state.fullscreen = true
        $("html,body").css("overflow", "hidden")
        editor
          .css({
            width: $(window).width(),
            height: $(window).height()
          })
          .addClass(fullscreenClass)
        this.resize()
        $.proxy(settings.onfullscreen, this)()
        $(window).bind("keyup", escHandle)
      } else {
        $(window).unbind("keyup", escHandle)
        this.fullscreenExit()
      }
      return this
    },

    /**
     * 编辑器退出全屏显示
     * Exit fullscreen state
     *
     * @returns {editormd}         返回editormd的实例对象
     */

    fullscreenExit: function() {
      var editor = this.editor
      var settings = this.settings
      var toolbar = this.toolbar
      var fullscreenClass = this.classPrefix + "fullscreen"
      this.state.fullscreen = false
      if (toolbar) {
        toolbar
          .find(".fa[name=fullscreen]")
          .parent()
          .removeClass("active")
      }
      $("html,body").css("overflow", "")
      editor
        .css({
          width: editor.data("oldWidth"),
          height: editor.data("oldHeight")
        })
        .removeClass(fullscreenClass)
      this.resize()
      $.proxy(settings.onfullscreenExit, this)()
      return this
    },

    /**
     * 加载并执行插件
     * Load and execute the plugin
     *
     * @param   {String}     name    plugin name / function name
     * @param   {String}     path    plugin load path
     * @returns {editormd}           返回editormd的实例对象
     */

    executePlugin: function(name, path) {
      var _this = this
      var cm = this.cm
      var settings = this.settings
      path = settings.pluginPath + path
      if (typeof define === "function") {
        if (typeof this[name] === "undefined") {
          alert(
            "Error: " +
              name +
              " plugin is not found, you are not load this plugin."
          )
          return this
        }
        this[name](cm)
        return this
      }
      if ($.inArray(path, editormd.loadFiles.plugin) < 0) {
        editormd.loadPlugin(path, function() {
          editormd.loadPlugins[name] = _this[name]
          _this[name](cm)
        })
      } else {
        $.proxy(editormd.loadPlugins[name], this)(cm)
      }
      return this
    },

    /**
     * 搜索替换
     * Search & replace
     *
     * @param   {String}     command    CodeMirror serach commands, "find, fintNext, fintPrev, clearSearch, replace, replaceAll"
     * @returns {editormd}              return this
     */

    search: function(command) {
      var settings = this.settings
      if (!settings.searchReplace) {
        alert("Error: settings.searchReplace == false")
        return this
      }
      if (!settings.readOnly) {
        this.cm.execCommand(command || "find")
      }
      return this
    },
    searchReplace: function() {
      this.search("replace")
      return this
    },
    searchReplaceAll: function() {
      this.search("replaceAll")
      return this
    }
  }

  editormd.fn.init.prototype = editormd.fn

  /**
   * 锁屏
   * lock screen when dialog opening
   *
   * @returns {void}
   */

  editormd.dialogLockScreen = function() {
    var settings = this.settings || { dialogLockScreen: true }
    if (settings.dialogLockScreen) {
      $("html,body").css("overflow", "hidden")
      this.resize()
    }
  }

  /**
   * 显示透明背景层
   * Display mask layer when dialog opening
   *
   * @param   {Object}     dialog    dialog jQuery object
   * @returns {void}
   */

  editormd.dialogShowMask = function(dialog) {
    var editor = this.editor
    var settings = this.settings || { dialogShowMask: true }
    dialog.css({
      top: ($(window).height() - dialog.height()) / 2 + "px",
      left: ($(window).width() - dialog.width()) / 2 + "px"
    })
    if (settings.dialogShowMask) {
      editor
        .children("." + this.classPrefix + "mask")
        .css("z-index", parseInt(dialog.css("z-index")) - 1)
        .show()
    }
  }

  editormd.toolbarHandlers = {
    undo: function() {
      this.cm.undo()
    },
    redo: function() {
      this.cm.redo()
    },
    bold: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      cm.replaceSelection("**" + selection + "**")
      if (selection === "") {
        cm.setCursor(cursor.line, cursor.ch + 2)
      }
    },
    del: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      cm.replaceSelection("~~" + selection + "~~")
      if (selection === "") {
        cm.setCursor(cursor.line, cursor.ch + 2)
      }
    },
    italic: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      cm.replaceSelection("*" + selection + "*")
      if (selection === "") {
        cm.setCursor(cursor.line, cursor.ch + 1)
      }
    },
    quote: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      if (cursor.ch !== 0) {
        cm.setCursor(cursor.line, 0)
        cm.replaceSelection("> " + selection)
        cm.setCursor(cursor.line, cursor.ch + 2)
      } else {
        cm.replaceSelection("> " + selection)
      }
      //cm.replaceSelection("> " + selection);
      //cm.setCursor(cursor.line, (selection === "") ? cursor.ch + 2 : cursor.ch + selection.length + 2);
    },
    ucfirst: function() {
      var cm = this.cm
      var selection = cm.getSelection()
      var selections = cm.listSelections()
      cm.replaceSelection(editormd.firstUpperCase(selection))
      cm.setSelections(selections)
    },
    ucwords: function() {
      var cm = this.cm
      var selection = cm.getSelection()
      var selections = cm.listSelections()
      cm.replaceSelection(editormd.wordsFirstUpperCase(selection))
      cm.setSelections(selections)
    },
    uppercase: function() {
      var cm = this.cm
      var selection = cm.getSelection()
      var selections = cm.listSelections()
      cm.replaceSelection(selection.toUpperCase())
      cm.setSelections(selections)
    },
    lowercase: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      var selections = cm.listSelections()
      cm.replaceSelection(selection.toLowerCase())
      cm.setSelections(selections)
    },
    h1: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      if (cursor.ch !== 0) {
        cm.setCursor(cursor.line, 0)
        cm.replaceSelection("# " + selection)
        cm.setCursor(cursor.line, cursor.ch + 2)
      } else {
        cm.replaceSelection("# " + selection)
      }
    },
    h2: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      if (cursor.ch !== 0) {
        cm.setCursor(cursor.line, 0)
        cm.replaceSelection("## " + selection)
        cm.setCursor(cursor.line, cursor.ch + 3)
      } else {
        cm.replaceSelection("## " + selection)
      }
    },
    h3: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      if (cursor.ch !== 0) {
        cm.setCursor(cursor.line, 0)
        cm.replaceSelection("### " + selection)
        cm.setCursor(cursor.line, cursor.ch + 4)
      } else {
        cm.replaceSelection("### " + selection)
      }
    },
    h4: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      if (cursor.ch !== 0) {
        cm.setCursor(cursor.line, 0)
        cm.replaceSelection("#### " + selection)
        cm.setCursor(cursor.line, cursor.ch + 5)
      } else {
        cm.replaceSelection("#### " + selection)
      }
    },
    h5: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      if (cursor.ch !== 0) {
        cm.setCursor(cursor.line, 0)
        cm.replaceSelection("##### " + selection)
        cm.setCursor(cursor.line, cursor.ch + 6)
      } else {
        cm.replaceSelection("##### " + selection)
      }
    },
    h6: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      if (cursor.ch !== 0) {
        cm.setCursor(cursor.line, 0)
        cm.replaceSelection("###### " + selection)
        cm.setCursor(cursor.line, cursor.ch + 7)
      } else {
        cm.replaceSelection("###### " + selection)
      }
    },
    "list-ul": function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      if (selection === "") {
        cm.replaceSelection("- " + selection)
      } else {
        var selectionText = selection.split("\n")
        for (var i = 0, len = selectionText.length; i < len; i++) {
          selectionText[i] =
            selectionText[i] === "" ? "" : "- " + selectionText[i]
        }
        cm.replaceSelection(selectionText.join("\n"))
      }
    },
    "list-ol": function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      if (selection === "") {
        cm.replaceSelection("1. " + selection)
      } else {
        var selectionText = selection.split("\n")
        for (var i = 0, len = selectionText.length; i < len; i++) {
          selectionText[i] =
            selectionText[i] === "" ? "" : i + 1 + ". " + selectionText[i]
        }
        cm.replaceSelection(selectionText.join("\n"))
      }
    },
    hr: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      cm.replaceSelection(
        (cursor.ch !== 0 ? "\n\n" : "\n") + "------------\n\n"
      )
    },
    tex: function() {
      if (!this.settings.tex) {
        alert("settings.tex === false")
        return this
      }
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      cm.replaceSelection("$$" + selection + "$$")
      if (selection === "") {
        cm.setCursor(cursor.line, cursor.ch + 2)
      }
    },
    link: function() {
      this.executePlugin("linkDialog", "link-dialog/link-dialog")
    },
    "reference-link": function() {
      this.executePlugin(
        "referenceLinkDialog",
        "reference-link-dialog/reference-link-dialog"
      )
    },
    pagebreak: function() {
      if (!this.settings.pageBreak) {
        alert("settings.pageBreak === false")
        return this
      }
      var cm = this.cm
      var selection = cm.getSelection()
      cm.replaceSelection("\r\n[========]\r\n")
    },
    image: function() {
      this.executePlugin("imageDialog", "image-dialog/image-dialog")
    },
    code: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      cm.replaceSelection("`" + selection + "`")
      if (selection === "") {
        cm.setCursor(cursor.line, cursor.ch + 1)
      }
    },
    "code-block": function() {
      this.executePlugin(
        "codeBlockDialog",
        "code-block-dialog/code-block-dialog"
      )
    },
    "preformatted-text": function() {
      this.executePlugin(
        "preformattedTextDialog",
        "preformatted-text-dialog/preformatted-text-dialog"
      )
    },
    table: function() {
      this.executePlugin("tableDialog", "table-dialog/table-dialog")
    },
    datetime: function() {
      var cm = this.cm
      var selection = cm.getSelection()
      var date = new Date()
      var langName = this.settings.lang.name
      var datefmt =
        editormd.dateFormat() +
        " " +
        editormd.dateFormat(
          langName === "zh-cn" || langName === "zh-tw"
            ? "cn-week-day"
            : "week-day"
        )
      cm.replaceSelection(datefmt)
    },
    emoji: function() {
      this.executePlugin("emojiDialog", "emoji-dialog/emoji-dialog")
    },
    "html-entities": function() {
      this.executePlugin(
        "htmlEntitiesDialog",
        "html-entities-dialog/html-entities-dialog"
      )
    },
    "goto-line": function() {
      this.executePlugin("gotoLineDialog", "goto-line-dialog/goto-line-dialog")
    },
    watch: function() {
      this[this.settings.watch ? "unwatch" : "watch"]()
    },
    preview: function() {
      this.previewing()
    },
    fullscreen: function() {
      this.fullscreen()
    },
    clear: function() {
      this.clear()
    },
    search: function() {
      this.search()
    },
    help: function() {
      this.executePlugin("helpDialog", "help-dialog/help-dialog")
    },
    info: function() {
      this.showInfoDialog()
    }
  }

  var isMac = navigator.platform.toUpperCase().indexOf("MAC") >= 0
  var key = isMac ? "Cmd" : "Ctrl"
  editormd.keyMaps = {
    [key + "-1"]: "h1",
    [key + "-2"]: "h2",
    [key + "-3"]: "h3",
    [key + "-4"]: "h4",
    [key + "-5"]: "h5",
    [key + "-6"]: "h6",
    [key + "-B"]: "bold", // if this is string ==  editormd.toolbarHandlers.xxxx
    [key + "-D"]: "datetime",
    [key + "Ctrl-E"]: function() {
      // emoji
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      if (!this.settings.emoji) {
        alert("Error: settings.emoji == false")
        return
      }
      cm.replaceSelection(":" + selection + ":")
      if (selection === "") {
        cm.setCursor(cursor.line, cursor.ch + 1)
      }
    },
    [key + "-Alt-G"]: "goto-line",
    [key + "-H"]: "hr",
    [key + "-I"]: "italic",
    [key + "-K"]: "code",
    "Ctrl-L": function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      var title = selection === "" ? "" : ' "' + selection + '"'
      cm.replaceSelection("[" + selection + "](" + title + ")")
      if (selection === "") {
        cm.setCursor(cursor.line, cursor.ch + 1)
      }
    },
    [key + "-U"]: "list-ul",
    "Shift-Ctrl-A": function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      if (!this.settings.atLink) {
        alert("Error: settings.atLink == false")
        return
      }
      cm.replaceSelection("@" + selection)
      if (selection === "") {
        cm.setCursor(cursor.line, cursor.ch + 1)
      }
    },
    ["Shift" + key + "-C"]: "code",
    ["Shift" + key + "Q"]: "quote",
    ["Shift" + key + "S"]: "del",
    ["Shift" + key + "K"]: "tex", // KaTeX
    "Shift-Alt-C": function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      cm.replaceSelection(["```", selection, "```"].join("\n"))
      if (selection === "") {
        cm.setCursor(cursor.line, cursor.ch + 3)
      }
    },
    ["Shift-" + key + "-Alt-C"]: "code-block",
    ["Shift-" + key + "-H"]: "html-entities",
    "Shift-Alt-H": "help",
    ["Shift-" + key + "-E"]: "emoji",
    ["Shift-" + key + "-U"]: "uppercase",
    "Shift-Alt-U": "ucwords",
    ["Shift-" + key + "-Alt-U"]: "ucfirst",
    "Shift-Alt-L": "lowercase",
    ["Shift-" + key + "-I"]: function() {
      var cm = this.cm
      var cursor = cm.getCursor()
      var selection = cm.getSelection()
      var title = selection === "" ? "" : ' "' + selection + '"'
      cm.replaceSelection("![" + selection + "](" + title + ")")
      if (selection === "") {
        cm.setCursor(cursor.line, cursor.ch + 4)
      }
    },
    ["Shift-" + key + "-Alt-I"]: "image",
    ["Shift-" + key + "-L"]: "link",
    ["Shift-" + key + "-O"]: "list-ol",
    ["Shift-" + key + "-P"]: "preformatted-text",
    ["Shift-" + key + "-T"]: "table",
    "Shift-Alt-P": "pagebreak",
    F9: "watch",
    F10: "preview",
    F11: "fullscreen"
  }

  /**
   * 清除字符串两边的空格
   * Clear the space of strings both sides.
   *
   * @param   {String}    str            string
   * @returns {String}                   trimed string
   */

  var trim = function(str) {
    return !String.prototype.trim
      ? str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, "")
      : str.trim()
  }

  editormd.trim = trim

  /**
   * 所有单词首字母大写
   * Words first to uppercase
   *
   * @param   {String}    str            string
   * @returns {String}                   string
   */

  var ucwords = function(str) {
    return str.toLowerCase().replace(/\b(\w)|\s(\w)/g, function($1) {
      return $1.toUpperCase()
    })
  }

  editormd.ucwords = editormd.wordsFirstUpperCase = ucwords

  /**
   * 字符串首字母大写
   * Only string first char to uppercase
   *
   * @param   {String}    str            string
   * @returns {String}                   string
   */

  var firstUpperCase = function(str) {
    return str.toLowerCase().replace(/\b(\w)/, function($1) {
      return $1.toUpperCase()
    })
  }

  var ucfirst = firstUpperCase
  editormd.firstUpperCase = editormd.ucfirst = firstUpperCase
  editormd.urls = {
    atLinkBase: "https://github.com/"
  }
  editormd.regexs = {
    atLink: /@(\w+)/g,
    email: /(\w+)@(\w+)\.(\w+)\.?(\w+)?/g,
    emailLink: /(mailto:)?([\w\.\_]+)@(\w+)\.(\w+)\.?(\w+)?/g,
    emoji: /:([\w\+-]+):/g,
    emojiDatetime: /(\d{1,2}:\d{1,2}:\d{1,2})/g,
    twemoji: /:(tw-([\w]+)-?(\w+)?):/g,
    fontAwesome: /:(fa-([\w]+)(-(\w+)){0,}):/g,
    editormdLogo: /:(editormd-logo-?(\w+)?):/g,
    pageBreak: /^\[[=]{8,}\]$/
  }
  // Emoji graphics files url path
  editormd.emoji = {
    path: "http://www.emoji-cheat-sheet.com/graphics/emojis/",
    ext: ".png"
  }
  // Twitter Emoji (Twemoji)  graphics files url path
  editormd.twemoji = {
    path: "http://twemoji.maxcdn.com/36x36/",
    ext: ".png"
  }

  /**
   * 自定义marked的解析器
   * Custom Marked renderer rules
   *
   * @param   {Array}    markdownToC     传入用于接收TOC的数组
   * @returns {Renderer} markedRenderer  返回marked的Renderer自定义对象
   */

  editormd.markedRenderer = function(markdownToC, options) {
    var defaults = {
      toc: true, // Table of contents
      tocm: false,
      tocStartLevel: 1, // Said from H1 to create ToC
      pageBreak: true,
      atLink: true, // for @link
      emailLink: true, // for mail address auto link
      taskList: false, // Enable Github Flavored Markdown task lists
      emoji: false, // :emoji: , Support Twemoji, fontAwesome, Editor.md logo emojis.
      tex: false, // TeX(LaTeX), based on KaTeX
      flowChart: false, // flowChart.js only support IE9+
      sequenceDiagram: false // sequenceDiagram.js only support IE9+
    }
    var settings = $.extend(defaults, options || {})
    var marked = editormd.$marked
    var markedRenderer = new marked.Renderer()
    markdownToC = markdownToC || []

    var regexs = editormd.regexs
    var atLinkReg = regexs.atLink
    var emojiReg = regexs.emoji
    var emailReg = regexs.email
    var emailLinkReg = regexs.emailLink
    var twemojiReg = regexs.twemoji
    var faIconReg = regexs.fontAwesome
    var editormdLogoReg = regexs.editormdLogo
    var pageBreakReg = regexs.pageBreak

    markedRenderer.emoji = function(text) {
      text = text.replace(editormd.regexs.emojiDatetime, function($1) {
        return $1.replace(/:/g, "&#58;")
      })

      var matchs = text.match(emojiReg)

      if (!matchs || !settings.emoji) {
        return text
      }

      for (var i = 0, len = matchs.length; i < len; i++) {
        if (matchs[i] === ":+1:") {
          matchs[i] = ":\\+1:"
        }

        text = text.replace(new RegExp(matchs[i]), function($1, $2) {
          var faMatchs = $1.match(faIconReg)
          var name = $1.replace(/:/g, "")
          if (faMatchs) {
            for (var fa = 0, len1 = faMatchs.length; fa < len1; fa++) {
              var faName = faMatchs[fa].replace(/:/g, "")
              return (
                '<i class="fa ' +
                faName +
                ' fa-emoji" title="' +
                faName.replace("fa-", "") +
                '"></i>'
              )
            }
          } else {
            var emdlogoMathcs = $1.match(editormdLogoReg)
            var twemojiMatchs = $1.match(twemojiReg)
            if (emdlogoMathcs) {
              for (var x = 0, len2 = emdlogoMathcs.length; x < len2; x++) {
                var logoName = emdlogoMathcs[x].replace(/:/g, "")
                return (
                  '<i class="' +
                  logoName +
                  '" title="Editor.md logo (' +
                  logoName +
                  ')"></i>'
                )
              }
            } else if (twemojiMatchs) {
              for (var t = 0, len3 = twemojiMatchs.length; t < len3; t++) {
                var twe = twemojiMatchs[t].replace(/:/g, "").replace("tw-", "")
                return (
                  '<img src="' +
                  editormd.twemoji.path +
                  twe +
                  editormd.twemoji.ext +
                  '" title="twemoji-' +
                  twe +
                  '" alt="twemoji-' +
                  twe +
                  '" class="emoji twemoji" />'
                )
              }
            } else {
              var src = name === "+1" ? "plus1" : name
              src = src === "black_large_square" ? "black_square" : src
              src = src === "moon" ? "waxing_gibbous_moon" : src
              return (
                '<img src="' +
                editormd.emoji.path +
                src +
                editormd.emoji.ext +
                '" class="emoji" title="&#58;' +
                name +
                '&#58;" alt="&#58;' +
                name +
                '&#58;" />'
              )
            }
          }
        })
      }
      return text
    }

    markedRenderer.atLink = function(text) {
      if (atLinkReg.test(text)) {
        if (settings.atLink) {
          text = text.replace(emailReg, function($1, $2, $3, $4) {
            return $1.replace(/@/g, "_#_&#64;_#_")
          })
          text = text
            .replace(atLinkReg, function($1, $2) {
              return (
                '<a href="' +
                editormd.urls.atLinkBase +
                "" +
                $2 +
                '" title="&#64;' +
                $2 +
                '" class="at-link">' +
                $1 +
                "</a>"
              )
            })
            .replace(/_#_&#64;_#_/g, "@")
        }
        if (settings.emailLink) {
          text = text.replace(emailLinkReg, function($1, $2, $3, $4, $5) {
            return !$2 &&
              $.inArray($5, "jpg|jpeg|png|gif|webp|ico|icon|pdf".split("|")) < 0
              ? '<a href="mailto:' + $1 + '">' + $1 + "</a>"
              : $1
          })
        }
        return text
      }
      return text
    }

    markedRenderer.link = function(href, title, text) {
      if (this.options.sanitize) {
        try {
          var prot = decodeURIComponent(unescape(href))
            .replace(/[^\w:]/g, "")
            .toLowerCase()
          if (prot.indexOf("javascript:") === 0) {
            return ""
          }
        } catch (e) {
          return ""
        }
      }
      var out = '<a href="' + href + '"'
      if (atLinkReg.test(title) || atLinkReg.test(text)) {
        if (title) {
          out += ' title="' + title.replace(/@/g, "&#64;")
        }
        return out + '">' + text.replace(/@/g, "&#64;") + "</a>"
      }
      if (title) {
        out += ' title="' + title + '"'
      }
      out += ">" + text + "</a>"
      return out
    }

    markedRenderer.heading = function(text, level, raw) {
      var linkText = text
      var hasLinkReg = /\s*<a\s*href\=\"(.*)\"\s*([^\>]*)\>(.*)<\/a\>\s*/
      var getLinkTextReg = /\s*<a\s*([^\>]+)\>([^\>]*)<\/a\>\s*/g
      if (hasLinkReg.test(text)) {
        var tempText = []
        text = text.split(/<a\s*([^\>]+)\>([^\>]*)<\/a\>/)
        for (var i = 0, len = text.length; i < len; i++) {
          tempText.push(text[i].replace(/\s*href\=\"(.*)\"\s*/g, ""))
        }
        text = tempText.join(" ")
      }
      text = trim(text)
      var escapedText = text.toLowerCase().replace(/[^\w]+/g, "-")
      var toc = {
        text: text,
        level: level,
        slug: escapedText
      }
      var isChinese = /^[\u4e00-\u9fa5]+$/.test(text)
      var id = isChinese
        ? escape(text).replace(/\%/g, "")
        : text.toLowerCase().replace(/[^\w]+/g, "-")
      markdownToC.push(toc)
      var headingHTML =
        "<h" +
        level +
        ' id="h' +
        level +
        "-" +
        this.options.headerPrefix +
        id +
        '">'
      headingHTML += '<a name="' + text + '" class="reference-link"></a>'
      headingHTML += '<span class="header-link octicon octicon-link"></span>'
      headingHTML += hasLinkReg
        ? this.atLink(this.emoji(linkText))
        : this.atLink(this.emoji(text))
      headingHTML += "</h" + level + ">"
      return headingHTML
    }
    markedRenderer.pageBreak = function(text) {
      if (pageBreakReg.test(text) && settings.pageBreak) {
        text =
          '<hr style="page-break-after:always;" class="page-break editormd-page-break" />'
      }
      return text
    }
    markedRenderer.paragraph = function(text) {
      var isTeXInline = /\$\$(.*)\$\$/g.test(text)
      var isTeXLine = /^\$\$(.*)\$\$$/.test(text)
      var isTeXAddClass = isTeXLine
        ? ' class="' + editormd.classNames.tex + '"'
        : ""
      var isToC = settings.tocm
        ? /^(\[TOC\]|\[TOCM\])$/.test(text)
        : /^\[TOC\]$/.test(text)
      var isToCMenu = /^\[TOCM\]$/.test(text)
      if (!isTeXLine && isTeXInline) {
        text = text.replace(/(\$\$([^\$]*)\$\$)+/g, function($1, $2) {
          return (
            '<span class="' +
            editormd.classNames.tex +
            '">' +
            $2.replace(/\$/g, "") +
            "</span>"
          )
        })
      } else {
        text = isTeXLine ? text.replace(/\$/g, "") : text
      }
      var tocHTML =
        '<div class="markdown-toc editormd-markdown-toc">' + text + "</div>"
      return isToC
        ? isToCMenu
          ? '<div class="editormd-toc-menu">' + tocHTML + "</div><br/>"
          : tocHTML
        : pageBreakReg.test(text)
          ? this.pageBreak(text)
          : "<p" +
            isTeXAddClass +
            ">" +
            this.atLink(this.emoji(text)) +
            "</p>\n"
    }
    markedRenderer.code = function(code, lang, escaped) {
      if (lang === "seq" || lang === "sequence") {
        return '<div class="sequence-diagram">' + code + "</div>"
      } else if (lang === "flow") {
        return '<div class="flowchart">' + code + "</div>"
      } else if (lang === "math" || lang === "latex" || lang === "katex") {
        return '<p class="' + editormd.classNames.tex + '">' + code + "</p>"
      } else {
        return marked.Renderer.prototype.code.apply(this, arguments)
      }
    }
    markedRenderer.tablecell = function(content, flags) {
      var type = flags.header ? "th" : "td"
      var tag = flags.align
        ? "<" + type + ' style="text-align:' + flags.align + '">'
        : "<" + type + ">"
      return tag + this.atLink(this.emoji(content)) + "</" + type + ">\n"
    }
    markedRenderer.listitem = function(text) {
      if (settings.taskList && /^\s*\[[x\s]\]\s*/.test(text)) {
        text = text
          .replace(
            /^\s*\[\s\]\s*/,
            '<input type="checkbox" class="task-list-item-checkbox" /> '
          )
          .replace(
            /^\s*\[x\]\s*/,
            '<input type="checkbox" class="task-list-item-checkbox" checked disabled /> '
          )
        return (
          '<li style="list-style: none;">' +
          this.atLink(this.emoji(text)) +
          "</li>"
        )
      } else {
        return "<li>" + this.atLink(this.emoji(text)) + "</li>"
      }
    }
    return markedRenderer
  }

  /**
   *
   * 生成TOC(Table of Contents)
   * Creating ToC (Table of Contents)
   *
   * @param   {Array}    toc             从marked获取的TOC数组列表
   * @param   {Element}  container       插入TOC的容器元素
   * @param   {Integer}  startLevel      Hx 起始层级
   * @returns {Object}   tocContainer    返回ToC列表容器层的jQuery对象元素
   */

  editormd.markdownToCRenderer = function(
    toc,
    container,
    tocDropdown,
    startLevel
  ) {
    var html = ""
    var lastLevelArr = [0]
    // var lastLevel = 0
    var classPrefix = this.classPrefix
    startLevel = startLevel || 1
    for (var i = 0, len = toc.length; i < len; i++) {
      var text = toc[i].text
      var level = toc[i].level
      var stageLen = lastLevelArr.length
      var lastLevel = lastLevelArr[stageLen - 1]
      var goBack = 0
      if (level < startLevel) {
        continue
      }
      if (level > lastLevel) {
        html += ""
        lastLevelArr.push(level)
      } else if (level < lastLevel) {
        for (var j = stageLen - 1; j >= 0; j--) {
            if (level <= lastLevelArr[j]) {
                goBack ++
                lastLevelArr.pop()
            } else {
                lastLevelArr.push(level)
                break
            }
        }
        html += new Array(goBack + 1).join("</ul></li>")
      } else {
        html += "</ul></li>"
      }
      html +=
        '<li><a class="toc-level-' +
        level +
        '" href="#' +
        text +
        '" level="' +
        level +
        '">' +
        text +
        "</a><ul>"
    }

    var tocContainer = container.find(".markdown-toc")

    if (
      tocContainer.length < 1 &&
      container.attr("previewContainer") === "false"
    ) {
      var tocHTML =
        '<div class="markdown-toc ' + classPrefix + 'markdown-toc"></div>'
      tocHTML = tocDropdown
        ? '<div class="' + classPrefix + 'toc-menu">' + tocHTML + "</div>"
        : tocHTML
      container.html(tocHTML)
      tocContainer = container.find(".markdown-toc")
    }
    if (tocDropdown) {
      tocContainer.wrap('<div class="' + classPrefix + 'toc-menu"></div><br/>')
    }
    tocContainer
      .html('<ul class="markdown-toc-list"></ul>')
      .children(".markdown-toc-list")
      .html(html.replace(/\r?\n?<ul\><\/ul\>/g, ""))
    return tocContainer
  }

  /**
   *
   * 生成TOC下拉菜单
   * Creating ToC dropdown menu
   *
   * @param   {Object}   container       插入TOC的容器jQuery对象元素
   * @param   {String}   tocTitle        ToC title
   * @returns {Object}                   return toc-menu object
   */

  editormd.tocDropdownMenu = function(container, tocTitle) {
    tocTitle = tocTitle || "Table of Contents"
    var zindex = 400
    var tocMenus = container.find("." + this.classPrefix + "toc-menu")
    tocMenus.each(function() {
      var $this = $(this)
      var toc = $this.children(".markdown-toc")
      var icon = '<i class="fa fa-angle-down"></i>'
      var btn =
        '<a href="javascript:;" class="toc-menu-btn">' +
        icon +
        tocTitle +
        "</a>"
      var menu = toc.children("ul")
      var list = menu.find("li")
      toc.append(btn)
      list.first().before("<li><h1>" + tocTitle + " " + icon + "</h1></li>")
      $this
        .mouseover(function() {
          menu.show()
          list.each(function() {
            var li = $(this)
            var ul = li.children("ul")
            if (ul.html() === "") {
              ul.remove()
            }
            if (ul.length > 0 && ul.html() !== "") {
              var firstA = li.children("a").first()
              if (firstA.children(".fa").length < 1) {
                firstA.append(
                  $(icon).css({ float: "right", paddingTop: "4px" })
                )
              }
            }
            li
              .mouseover(function() {
                ul.css("z-index", zindex).show()
                zindex += 1
              })
              .mouseleave(function() {
                ul.hide()
              })
          })
        })
        .mouseleave(function() {
          menu.hide()
        })
    })

    return tocMenus
  }

  /**
   * 简单地过滤指定的HTML标签
   * Filter custom html tags
   *
   * @param   {String}   html          要过滤HTML
   * @param   {String}   filters       要过滤的标签
   * @returns {String}   html          返回过滤的HTML
   */

  editormd.filterHTMLTags = function(html, filters) {
    if (typeof html !== "string") {
      html = new String(html)
    }
    if (typeof filters !== "string") {
      return html
    }
    var expression = filters.split("|")
    var filterTags = expression[0].split(",")
    var attrs = expression[1]
    for (var i = 0, len = filterTags.length; i < len; i++) {
      var tag = filterTags[i]
      html = html.replace(
        new RegExp("<s*" + tag + "s*([^>]*)>([^>]*)<s*/" + tag + "s*>", "igm"),
        ""
      )
    }
    //return html;
    if (typeof attrs !== "undefined") {
      var htmlTagRegex = /<(\w+)\s*([^\>]*)\>([^\>]*)<\/(\w+)\>/gi
      if (attrs === "*") {
        html = html.replace(htmlTagRegex, function($1, $2, $3, $4, $5) {
          return "<" + $2 + ">" + $4 + "</" + $5 + ">"
        })
      } else if (attrs === "on*") {
        html = html.replace(htmlTagRegex, function($1, $2, $3, $4, $5) {
          var el = $("<" + $2 + ">" + $4 + "</" + $5 + ">")
          var _attrs = $($1)[0].attributes
          var $attrs = {}
          $.each(_attrs, function(i, e) {
            if (e.nodeName !== '"') {
              $attrs[e.nodeName] = e.nodeValue
              //   fixed <a href="javascript:alert('xss')"> will cause xss problem
              if (e.nodeName === "href" && e.nodeValue.toLowerCase().indexOf('javascript:') >= 0) {
                  $attrs[e.nodeName] = 'javascript:;';
              }
            }
          })
          $.each($attrs, function(i) {
            if (i.indexOf("on") === 0) {
              delete $attrs[i]
            }
          })
          el.attr($attrs)
          var text = typeof el[1] !== "undefined" ? $(el[1]).text() : ""
          // FIXED 使用 on* 过滤标签的属性，图片加链接的语法会出错的问题
          if ($2 && !isNaN($2) && $2 !== $5) {
            text += "<" + $2 + ">" + $4 + "</" + $5 + ">"
          } else if ($2 && isNaN($2) && $2 !== $5) {
            text += "</" + $5 + ">"
            return el[0].outerHTML + text
          } else {
            return el[0].outerHTML + text
          }
        })
      } else {
        html = html.replace(htmlTagRegex, function($1, $2, $3, $4) {
          var filterAttrs = attrs.split(",")
          var el = $($1)
          el.html($4)
          $.each(filterAttrs, function(i) {
            el.attr(filterAttrs[i], null)
          })
          return el[0].outerHTML
        })
      }
    }
    return html
  }

  /**
   * 将Markdown文档解析为HTML用于前台显示
   * Parse Markdown to HTML for Font-end preview.
   *
   * @param   {String}   id            用于显示HTML的对象ID
   * @param   {Object}   [options={}]  配置选项，可选
   * @returns {Object}   div           返回jQuery对象元素
   */

  editormd.markdownToHTML = function(id, options) {
    var defaults = {
      gfm: true,
      toc: true,
      tocm: false,
      tocStartLevel: 1,
      tocTitle: "目录",
      tocDropdown: false,
      tocContainer: "",
      markdown: "",
      markdownSourceCode: false,
      htmlDecode: false,
      autoLoadKaTeX: true,
      pageBreak: true,
      atLink: true, // for @link
      emailLink: true, // for mail address auto link
      tex: false,
      taskList: false, // Github Flavored Markdown task lists
      emoji: false,
      flowChart: false,
      sequenceDiagram: false,
      previewCodeHighlight: true
    }

    editormd.$marked = marked

    var div = $("#" + id)
    var settings = (div.settings = $.extend(true, defaults, options || {}))
    var saveTo = div.find("textarea")
    if (saveTo.length < 1) {
      div.append("<textarea></textarea>")
      saveTo = div.find("textarea")
    }
    var markdownDoc =
      settings.markdown === "" ? saveTo.val() : settings.markdown
    var markdownToC = []
    var rendererOptions = {
      toc: settings.toc,
      tocm: settings.tocm,
      tocStartLevel: settings.tocStartLevel,
      taskList: settings.taskList,
      emoji: settings.emoji,
      tex: settings.tex,
      pageBreak: settings.pageBreak,
      atLink: settings.atLink, // for @link
      emailLink: settings.emailLink, // for mail address auto link
      flowChart: settings.flowChart,
      sequenceDiagram: settings.sequenceDiagram,
      previewCodeHighlight: settings.previewCodeHighlight
    }
    var markedOptions = {
      renderer: editormd.markedRenderer(markdownToC, rendererOptions),
      gfm: settings.gfm,
      tables: true,
      breaks: true,
      pedantic: false,
      sanitize: settings.htmlDecode ? false : true, // 是否忽略HTML标签，即是否开启HTML标签解析，为了安全性，默认不开启
      smartLists: true,
      smartypants: true
    }
    markdownDoc = new String(markdownDoc)
    var markdownParsed = marked(markdownDoc, markedOptions)
    markdownParsed = editormd.filterHTMLTags(
      markdownParsed,
      settings.htmlDecode
    )
    if (settings.markdownSourceCode) {
      saveTo.text(markdownDoc)
    } else {
      saveTo.remove()
    }
    div
      .addClass("markdown-body " + this.classPrefix + "html-preview")
      .append(markdownParsed)
    var tocContainer =
      settings.tocContainer !== "" ? $(settings.tocContainer) : div
    if (settings.tocContainer !== "") {
      tocContainer.attr("previewContainer", false)
    }
    if (settings.toc) {
      div.tocContainer = this.markdownToCRenderer(
        markdownToC,
        tocContainer,
        settings.tocDropdown,
        settings.tocStartLevel
      )
      if (
        settings.tocDropdown ||
        div.find("." + this.classPrefix + "toc-menu").length > 0
      ) {
        this.tocDropdownMenu(div, settings.tocTitle)
      }
      if (settings.tocContainer !== "") {
        div.find(".editormd-toc-menu, .editormd-markdown-toc").remove()
      }
    }
    if (settings.previewCodeHighlight) {
      div.find("pre").addClass("prettyprint linenums")
      prettyPrint()
    }
    if (!editormd.isIE8) {
      if (settings.flowChart) {
        div.find(".flowchart").flowChart()
      }
      if (settings.sequenceDiagram) {
        div.find(".sequence-diagram").sequenceDiagram({ theme: "simple" })
      }
    }
    if (settings.tex) {
      var katexHandle = function() {
        div.find("." + editormd.classNames.tex).each(function() {
          var tex = $(this)
          katex.render(
            tex
              .html()
              .replace(/&lt;/g, "<")
              .replace(/&gt;/g, ">"),
            tex[0]
          )
          tex.find(".katex").css("font-size", "1.6em")
        })
      }
      if (settings.autoLoadKaTeX && !editormd.$katex && !editormd.kaTeXLoaded) {
        this.loadKaTeX(function() {
          editormd.$katex = katex
          editormd.kaTeXLoaded = true
          katexHandle()
        })
      } else {
        katexHandle()
      }
    }
    div.getMarkdown = function() {
      return saveTo.val()
    }
    return div
  }

  // Editor.md themes, change toolbar themes etc.
  // added @1.5.0
  editormd.themes = ["default", "dark"]
  // Preview area themes
  // added @1.5.0
  editormd.previewThemes = ["default", "dark"]
  // CodeMirror / editor area themes
  // @1.5.0 rename -> editorThemes, old version -> themes
  editormd.editorThemes = [
    "default",
    "3024-day",
    "3024-night",
    "ambiance",
    "ambiance-mobile",
    "base16-dark",
    "base16-light",
    "blackboard",
    "cobalt",
    "eclipse",
    "elegant",
    "erlang-dark",
    "lesser-dark",
    "mbo",
    "mdn-like",
    "midnight",
    "monokai",
    "neat",
    "neo",
    "night",
    "paraiso-dark",
    "paraiso-light",
    "pastel-on-dark",
    "rubyblue",
    "solarized",
    "the-matrix",
    "tomorrow-night-eighties",
    "twilight",
    "vibrant-ink",
    "xq-dark",
    "xq-light"
  ]
  editormd.loadPlugins = {}
  editormd.loadFiles = {
    js: [],
    css: [],
    plugin: []
  }
  /**
   * 动态加载Editor.md插件，但不立即执行
   * Load editor.md plugins
   *
   * @param {String}   fileName              插件文件路径
   * @param {Function} [callback=function()] 加载成功后执行的回调函数
   * @param {String}   [into="head"]         嵌入页面的位置
   */

  editormd.loadPlugin = function(fileName, callback, into) {
    callback = callback || function() {}
    this.loadScript(
      fileName,
      function() {
        editormd.loadFiles.plugin.push(fileName)
        callback()
      },
      into
    )
  }

  /**
   * 动态加载CSS文件的方法
   * Load css file method
   *
   * @param {String}   fileName              CSS文件名
   * @param {Function} [callback=function()] 加载成功后执行的回调函数
   * @param {String}   [into="head"]         嵌入页面的位置
   */

  editormd.loadCSS = function(fileName, callback, into) {
    into = into || "head"
    callback = callback || function() {}

    var css = document.createElement("link")
    css.type = "text/css"
    css.rel = "stylesheet"
    css.onload = css.onreadystatechange = function() {
      editormd.loadFiles.css.push(fileName)
      callback()
    }
    css.href = fileName + ".css"
    if (into === "head") {
      document.getElementsByTagName("head")[0].appendChild(css)
    } else {
      document.body.appendChild(css)
    }
  }

  editormd.isIE = navigator.appName === "Microsoft Internet Explorer"
  editormd.isIE8 = editormd.isIE && navigator.appVersion.match(/8./i) === "8."

  /**
   * 动态加载JS文件的方法
   * Load javascript file method
   *
   * @param {String}   fileName              JS文件名
   * @param {Function} [callback=function()] 加载成功后执行的回调函数
   * @param {String}   [into="head"]         嵌入页面的位置
   */

  editormd.loadScript = function(fileName, callback, into) {
    into = into || "head"
    callback = callback || function() {}
    var script = null
    script = document.createElement("script")
    script.id = fileName.replace(/[\./]+/g, "-")
    script.type = "text/javascript"
    script.src = fileName + ".js"
    if (editormd.isIE8) {
      script.onreadystatechange = function() {
        if (script.readyState) {
          if (
            script.readyState === "loaded" ||
            script.readyState === "complete"
          ) {
            script.onreadystatechange = null
            editormd.loadFiles.js.push(fileName)
            callback()
          }
        }
      }
    } else {
      script.onload = function() {
        editormd.loadFiles.js.push(fileName)
        callback()
      }
    }
    if (into === "head") {
      document.getElementsByTagName("head")[0].appendChild(script)
    } else {
      document.body.appendChild(script)
    }
  }

  // 使用国外的CDN，加载速度有时会很慢，或者自定义URL
  // You can custom KaTeX load url.
  editormd.katexURL = {
    css: "//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.3.0/katex.min",
    js: "//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.3.0/katex.min"
  }
  editormd.kaTeXLoaded = false
  /**
   * 加载KaTeX文件
   * load KaTeX files
   *
   * @param {Function} [callback=function()]  加载成功后执行的回调函数
   */
  editormd.loadKaTeX = function(callback) {
    editormd.loadCSS(editormd.katexURL.css, function() {
      editormd.loadScript(editormd.katexURL.js, callback || function() {})
    })
  }

  /**
   * 锁屏
   * lock screen
   *
   * @param   {Boolean}   lock   Boolean 布尔值，是否锁屏
   * @returns {void}
   */

  editormd.lockScreen = function(lock) {
    $("html,body").css("overflow", lock ? "hidden" : "")
  }

  /**
   * 动态创建对话框
   * Creating custom dialogs
   *
   * @param   {Object} options 配置项键值对 Key/Value
   * @returns {dialog} 返回创建的dialog的jQuery实例对象
   */

  editormd.createDialog = function(options) {
    var defaults = {
      name: "",
      width: 420,
      height: 240,
      title: "",
      drag: true,
      closed: true,
      content: "",
      mask: true,
      maskStyle: {
        backgroundColor: "#fff",
        opacity: 0.1
      },
      lockScreen: true,
      footer: true,
      buttons: false
    }

    options = $.extend(true, defaults, options)

    var $this = this
    var editor = this.editor
    var classPrefix = editormd.classPrefix
    var guid = new Date().getTime()
    var dialogName =
      options.name === "" ? classPrefix + "dialog-" + guid : options.name
    var mouseOrTouch = editormd.mouseOrTouch
    var html = '<div class="' + classPrefix + "dialog " + dialogName + '">'
    if (options.title !== "") {
      html +=
        '<div class="' +
        classPrefix +
        'dialog-header"' +
        (options.drag ? ' style="cursor: move;"' : "") +
        ">"
      html +=
        '<strong class="' +
        classPrefix +
        'dialog-title">' +
        options.title +
        "</strong>"
      html += "</div>"
    }
    if (options.closed) {
      html +=
        '<a href="javascript:;" class="fa fa-close ' +
        classPrefix +
        'dialog-close"></a>'
    }
    html +=
      '<div class="' + classPrefix + 'dialog-container">' + options.content
    if (options.footer || typeof options.footer === "string") {
      html +=
        '<div class="' +
        classPrefix +
        'dialog-footer">' +
        (typeof options.footer === "boolean" ? "" : options.footer) +
        "</div>"
    }
    html += "</div>"
    html +=
      '<div class="' +
      classPrefix +
      "dialog-mask " +
      classPrefix +
      'dialog-mask-bg"></div>'
    html +=
      '<div class="' +
      classPrefix +
      "dialog-mask " +
      classPrefix +
      'dialog-mask-con"></div>'
    html += "</div>"
    editor.append(html)
    var dialog = editor.find("." + dialogName)
    dialog.lockScreen = function(lock) {
      if (options.lockScreen) {
        $("html,body").css("overflow", lock ? "hidden" : "")
        $this.resize()
      }
      return dialog
    }
    dialog.showMask = function() {
      if (options.mask) {
        editor
          .find("." + classPrefix + "mask")
          .css(options.maskStyle)
          .css("z-index", editormd.dialogZindex - 1)
          .show()
      }
      return dialog
    }
    dialog.hideMask = function() {
      if (options.mask) {
        editor.find("." + classPrefix + "mask").hide()
      }
      return dialog
    }
    dialog.loading = function(show) {
      var loading = dialog.find("." + classPrefix + "dialog-mask")
      loading[show ? "show" : "hide"]()
      return dialog
    }
    dialog.lockScreen(true).showMask()
    dialog.show().css({
      zIndex: editormd.dialogZindex,
      border: editormd.isIE8 ? "1px solid #ddd" : "",
      width:
        typeof options.width === "number"
          ? options.width + "px"
          : options.width,
      height:
        typeof options.height === "number"
          ? options.height + "px"
          : options.height
    })
    var dialogPosition = function() {
      dialog.css({
        top: ($(window).height() - dialog.height()) / 2 + "px",
        left: ($(window).width() - dialog.width()) / 2 + "px"
      })
    }
    dialogPosition()
    $(window).resize(dialogPosition)
    dialog
      .children("." + classPrefix + "dialog-close")
      .bind(mouseOrTouch("click", "touchend"), function() {
        dialog
          .hide()
          .lockScreen(false)
          .hideMask()
      })
    if (typeof options.buttons === "object") {
      var footer = (dialog.footer = dialog.find(
        "." + classPrefix + "dialog-footer"
      ))
      for (var key in options.buttons) {
        var btn = options.buttons[key]
        var btnClassName = classPrefix + key + "-btn"
        footer.append(
          '<button class="' +
            classPrefix +
            "btn " +
            btnClassName +
            '">' +
            btn[0] +
            "</button>"
        )
        btn[1] = $.proxy(btn[1], dialog)
        footer
          .children("." + btnClassName)
          .bind(mouseOrTouch("click", "touchend"), btn[1])
      }
    }
    if (options.title !== "" && options.drag) {
      var posX, posY
      var dialogHeader = dialog.children("." + classPrefix + "dialog-header")
      if (!options.mask) {
        dialogHeader.bind(mouseOrTouch("click", "touchend"), function() {
          editormd.dialogZindex += 2
          dialog.css("z-index", editormd.dialogZindex)
        })
      }
      var userCanSelect = function(obj) {
        obj.removeClass(classPrefix + "user-unselect").off("selectstart")
      }
      var userUnselect = function(obj) {
        obj
          .addClass(classPrefix + "user-unselect")
          .on("selectstart", function(event) {
            // selectstart for IE
            return false
          })
      }
      var moveAction = function(e) {
        e = e || window.event //IE
        var left,
          top,
          nowLeft = parseInt(dialog[0].style.left),
          nowTop = parseInt(dialog[0].style.top)
        if (nowLeft >= 0) {
          if (nowLeft + dialog.width() <= $(window).width()) {
            left = e.clientX - posX
          } else {
            left = $(window).width() - dialog.width()
            document.onmousemove = null
          }
        } else {
          left = 0
          document.onmousemove = null
        }
        if (nowTop >= 0) {
          top = e.clientY - posY
        } else {
          top = 0
          document.onmousemove = null
        }
        document.onselectstart = function() {
          return false
        }
        userUnselect($("body"))
        userUnselect(dialog)
        dialog[0].style.left = left + "px"
        dialog[0].style.top = top + "px"
      }
      dialogHeader.mousedown(function(e) {
        e = e || window.event //IE
        posX = e.clientX - parseInt(dialog[0].style.left)
        posY = e.clientY - parseInt(dialog[0].style.top)
        document.onmousemove = moveAction
      })
      document.onmouseup = function() {
        userCanSelect($("body"))
        userCanSelect(dialog)
        document.onselectstart = null
        document.onmousemove = null
      }
      dialogHeader.touchDraggable = function() {
        var offset = null
        var start = function(e) {
          var orig = e.originalEvent
          var pos = $(this)
            .parent()
            .position()
          offset = {
            x: orig.changedTouches[0].pageX - pos.left,
            y: orig.changedTouches[0].pageY - pos.top
          }
        }
        var move = function(e) {
          e.preventDefault()
          var orig = e.originalEvent
          $(this)
            .parent()
            .css({
              top: orig.changedTouches[0].pageY - offset.y,
              left: orig.changedTouches[0].pageX - offset.x
            })
        }
        this.bind("touchstart", start).bind("touchmove", move)
      }
      dialogHeader.touchDraggable()
    }
    editormd.dialogZindex += 2
    return dialog
  }

  /**
   * 鼠标和触摸事件的判断/选择方法
   * MouseEvent or TouchEvent type switch
   *
   * @param   {String} [mouseEventType="click"]    供选择的鼠标事件
   * @param   {String} [touchEventType="touchend"] 供选择的触摸事件
   * @returns {String} EventType                   返回事件类型名称
   */

  editormd.mouseOrTouch = function(mouseEventType, touchEventType) {
    mouseEventType = mouseEventType || "click"
    touchEventType = touchEventType || "touchend"
    var eventType = mouseEventType
    try {
      document.createEvent("TouchEvent")
      eventType = touchEventType
    } catch (e) {}
    return eventType
  }

  /**
   * 日期时间的格式化方法
   * Datetime format method
   *
   * @param   {String}   [format=""]  日期时间的格式，类似PHP的格式
   * @returns {String}   datefmt      返回格式化后的日期时间字符串
   */

  editormd.dateFormat = function(format) {
    format = format || ""
    var addZero = function(d) {
      return d < 10 ? "0" + d : d
    }
    var date = new Date()
    var year = date.getFullYear()
    var year2 = year.toString().slice(2, 4)
    var month = addZero(date.getMonth() + 1)
    var day = addZero(date.getDate())
    var weekDay = date.getDay()
    var hour = addZero(date.getHours())
    var min = addZero(date.getMinutes())
    var second = addZero(date.getSeconds())
    var ms = addZero(date.getMilliseconds())
    var datefmt = ""
    var ymd = year2 + "-" + month + "-" + day
    var fymd = year + "-" + month + "-" + day
    var hms = hour + ":" + min + ":" + second
    switch (format) {
      case "UNIX Time":
        datefmt = date.getTime()
        break
      case "UTC":
        datefmt = date.toUTCString()
        break
      case "yy":
        datefmt = year2
        break
      case "year":
      case "yyyy":
        datefmt = year
        break
      case "month":
      case "mm":
        datefmt = month
        break
      case "cn-week-day":
      case "cn-wd":
        var cnWeekDays = ["日", "一", "二", "三", "四", "五", "六"]
        datefmt = "星期" + cnWeekDays[weekDay]
        break
      case "week-day":
      case "wd":
        var weekDays = [
          "Sunday",
          "Monday",
          "Tuesday",
          "Wednesday",
          "Thursday",
          "Friday",
          "Saturday"
        ]
        datefmt = weekDays[weekDay]
        break
      case "day":
      case "dd":
        datefmt = day
        break
      case "hour":
      case "hh":
        datefmt = hour
        break
      case "min":
      case "ii":
        datefmt = min
        break
      case "second":
      case "ss":
        datefmt = second
        break
      case "ms":
        datefmt = ms
        break
      case "yy-mm-dd":
        datefmt = ymd
        break
      case "yyyy-mm-dd":
        datefmt = fymd
        break
      case "yyyy-mm-dd h:i:s ms":
      case "full + ms":
        datefmt = fymd + " " + hms + " " + ms
        break
      case "full":
      case "yyyy-mm-dd h:i:s":
        break
      default:
        datefmt = fymd + " " + hms
        break
    }
    return datefmt
  }
  return editormd
})