/*
 * Editor.md
 *
 * @file        editormd.js
 * @version     v1.5.0
 * @description Open source online markdown editor.
 * @license     MIT License
 * @author      Pandao
 * {@link       https://github.com/pandao/editor.md}
 *
 * @update by star7th 2020-7-1
 */

; (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
    {
      /* Require.js define replace */
    } else {
      define(['jquery'], factory)  // for Sea.js
    }
  } else {
    window.editormd = factory()
  }
}(function () {
  /* Require.js assignment replace */

  'use strict'

  var $ = (typeof (jQuery) !== 'undefined') ? jQuery : Zepto

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

  $.fn.extend({
    // tag@a:plantuml
    plantuml: function () {
      var previewContainer = $(this)
      previewContainer.find('pre:has(.lang-plantuml)').each(function () {
        var $uml = $(this)
        var lines = []
        $uml.find('.lang-plantuml').each(function () {
          lines.push($(this).text())
        })
        var img = '<img src="' + plantuml_imgsrc(lines.join('\n')) + '"><br>'
        $uml.replaceWith(img)
      })
    }
  })

  /**
   * 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,
    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,
    mindMap: 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)

      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')
      }

      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')
        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
    },
    /**
     * 解析思维导图
     *
     * @returns {editormd}             返回editormd的实例对象
     */
    mindmapRender: function () {
      this.previewContainer.find('.mindmap').each(function () {
        var data = window.markmap.transform($(this).text().trim())
        $(this).html('')
        var svgId = this.id + '-svg'
        $(this).append($('<svg style="width: 100%;height:500px" id="' + svgId + '"></svg>'))
        window.markmap.markmap('svg#' + svgId, data)
      })

      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()
        // tag@a:plantuml
        previewContainer.plantuml()
      }

      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 (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
                break

              case 121:
                $.proxy(toolbarHandlers['preview'], _this)()
                return false
                break

              case 122:
                $.proxy(toolbarHandlers['fullscreen'], _this)()
                return false
                break

              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')
        codeMirror.css('height', 'auto')
      } 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,
        mindMap: settings.mindMap
      }

      var markedOptions = this.markedOptions = {
        renderer: editormd.markedRenderer(markdownToC, rendererOptions),
        gfm: true,
        tables: true,
        breaks: true,
        pedantic: false,
        sanitize: !(settings.htmlDecode),  // 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)

      // console.info("cmValue", cmValue, newMarkdownDoc);

      newMarkdownDoc = editormd.filterHTMLTags(newMarkdownDoc, settings.htmlDecode)

      // console.error("cmValue", cmValue, newMarkdownDoc);

      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 (settings.mindMap) {
          _this.mindmapRender()
        }

        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()
    }
  }

  editormd.keyMaps = {
    'Ctrl-1': 'h1',
    'Ctrl-2': 'h2',
    'Ctrl-3': 'h3',
    'Ctrl-4': 'h4',
    'Ctrl-5': 'h5',
    'Ctrl-6': 'h6',
    'Ctrl-B': 'bold',  // if this is string ==  editormd.toolbarHandlers.xxxx
    'Ctrl-D': 'datetime',

    '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)
      }
    },
    'Ctrl-Alt-G': 'goto-line',
    'Ctrl-H': 'hr',
    'Ctrl-I': 'italic',
    'Ctrl-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)
      }
    },
    'Ctrl-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-Ctrl-C': 'code',
    'Shift-Ctrl-Q': 'quote',
    'Shift-Ctrl-S': 'del',
    'Shift-Ctrl-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-Ctrl-Alt-C': 'code-block',
    'Shift-Ctrl-H': 'html-entities',
    'Shift-Alt-H': 'help',
    'Shift-Ctrl-E': 'emoji',
    'Shift-Ctrl-U': 'uppercase',
    'Shift-Alt-U': 'ucwords',
    'Shift-Ctrl-Alt-U': 'ucfirst',
    'Shift-Alt-L': 'lowercase',

    'Shift-Ctrl-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-Ctrl-Alt-I': 'image',
    'Shift-Ctrl-L': 'link',
    'Shift-Ctrl-O': 'list-ol',
    'Shift-Ctrl-P': 'preformatted-text',
    'Shift-Ctrl-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{2}:\d{2}:\d{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()
        } catch (e) {
          return ''
        }

        if (prot.indexOf('javascript:') === 0) {
          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) ? /^(\[TOC\]|\[TOCM\])$/i.test(text) : /^\[TOC\]$/i.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 if (/^mindmap/i.test(lang)) {
        var mapId = Math.ceil(Math.random() * 1000000)
        return "<div class='mindmap' id='mindmap-" + mapId + "'>" + code + '</div>'
      } 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 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

      if (level < startLevel) {
        continue
      }

      if (level > lastLevel) {
        html += ''
      } else if (level < lastLevel) {
        html += (new Array(lastLevel - level + 2)).join('</ul></li>')
      } else {
        html += '</ul></li>'
      }

      html += '<li><a class="toc-level-' + level + '" href="#' + text + '" level="' + level + '">' + text + '</a><ul>'
      lastLevel = level
    }

    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+)\>/ig

      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
          })

          $.each($attrs, function (i) {
            if (i.indexOf('on') === 0) {
              delete $attrs[i]
            }
          })

          el.attr($attrs)

          var text = (typeof el[1] !== 'undefined') ? $(el[1]).text() : ''

          return el[0].outerHTML + text
        })
      } else if (attrs === 'filterXSS') {
        var tags = ['a', 'abbr', 'address',
          'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'big', 'blockquote', 'br', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'dd', 'del', 'details', 'div', 'dl', 'dt', 'em', 'font', 'footer', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'header', 'hr', 'i', 'img', 'ins', 'li', 'mark', 'nav', 'ol', 'p', 'pre', 's', 'section', 'small', 'span', 'sub', 'sup', 'strong', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr', 'tt', 'u', 'ul', 'video', 'input'],
          tagAttrs = ['target', 'title', 'shape', 'coords', 'href', 'alt', 'autoplay', 'controls', 'loop', 'preload', 'src', 'dir', 'cite', 'align', 'valign', 'span', 'width', 'height', 'datetime', 'open', 'color', 'size', 'face', 'border', 'rowspan', 'colspan', 'style', 'class', 'id', 'name', 'type', 'checked', 'disabled'],
          whiteList = (function () {
            var result = {}
            for (var i = 0, len = tags.length; i < len; i++) {
              result[tags[i]] = tagAttrs
            };
            return result
          })()
        html = filterXSS(html, {
          whiteList: whiteList
        })
      } 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,
      mindMap: 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), // 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()
        // tag@a:plantuml
        $(div).plantuml()
      }

      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()
      }
    }

    if (settings.mindMap) {
      // 用立即执行函数来处理脑图
      (function () {
        div.find('.mindmap').each(function () {
          var data = window.markmap.transform($(this).text().trim())
          $(this).html('')
          var svgId = this.id + '-svg'
          $(this).append($('<svg style="width: 100%;height:500px" id="' + svgId + '"></svg>'))
          window.markmap.markmap('svg#' + svgId, data)
        })
      })()
    }

    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: '//cdn.staticfile.org/KaTeX/0.3.0/katex.min',
    js: '//cdn.staticfile.org/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)
        })
      }

      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
      })

      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'
      }

      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

    var userAgentInfo = navigator.userAgent
    var Agents = new Array('Android', 'iPhone', 'SymbianOS', 'Windows Phone', 'iPad', 'iPod')
    var flag = true
    for (var v = 0; v < Agents.length; v++) {
      if (userAgentInfo.indexOf(Agents[v]) > 0) {
        flag = false
        break
      }
    }
    if (!flag) {
      eventType = touchEventType
    }

    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':
      default:
        datefmt = fymd + ' ' + hms
        break
    }

    return datefmt
  }

  return editormd
}))