/*
 * Editor.md
 *
 * @file        editormd.amd.js 
 * @version     v1.3.0 
 * @description A simple online markdown editor.
 * @license     MIT License
 * @author      Pandao
 * {@link       https://github.com/pandao/editor.md}
 * @updateTime  2015-03-12
 */

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

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

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

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

            define(codeMirrorModules, factory);
        } 
        else 
        {
		    define(["jquery"], factory);  // for Sea.js
        }
	} 
	else
	{ 
        window.editormd = factory();
	}
    
}(function() {    
    
    /**
     * 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
     */

    if (typeof define == "function" && define.amd) {
       $          = arguments[0];
       marked     = arguments[1];
       prettify   = arguments[2];
       katex      = arguments[3];
       Raphael    = arguments[4];
       _          = arguments[5];
       flowchart  = arguments[6];
       CodeMirror = arguments[9];
   }
    
    "use strict";
    
    var $ = (typeof (jQuery) !== "undefined") ? jQuery : Zepto;

	if (typeof ($) === "undefined") {
		return ;
	}
    
    var editormd         = function (id, options) {
        return new editormd.fn.init(id, options);
    };
    
    editormd.title        = editormd.$name = "Editor.md";
    editormd.version      = "1.2.0";
    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", "anchor", "image", "code", "preformatted-text", "code-block", "table", "datetime", "emoji", "htmlEntities", "|",
            "watch", "preview", "fullscreen", "clear", "|",
            "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
        theme                : "default",
        value                : "",             // value for CodeMirror, if mode not gfm/markdown
        markdown             : "",
        width                : "100%",
        height               : "100%",
        path                 : "../lib/",       // Dependents module file directory
        pluginPath           : "",              // If this empty, default use settings.path + "../plugins/"
        autoLoadModules      : true,            // Automatic load dependent module files
        watch                : true,
        placeholder          : "now coding markdown...",
        codeFold             : false,
        autoHeight           : false,
        autoCloseTags        : true,
        searchReplace        : false,
        readOnly             : false,
        lineNumbers          : 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
        tocStartLevel        : 1,              // Said from H1 to create ToC
        htmlDecode           : false,          // Open the HTML tag identification    
        atLink               : true,           // for @link
        emailLink            : true,           // for email address auto link
        taskList             : false,          // Enable Github Flavored Markdown task lists
        emoji                : false,          // :emoji: , Support Github emoji, Twitter Emoji (Twemoji);
                                               // Support FontAwesome icon emoji :fa-xxx: > Using fontAwesome icon web fonts;
                                               // Support Editor.md logo icon emoji :editormd-logo: :editormd-logo-1x: > 1~8x;
        tex                  : false,          // TeX(LaTeX), based on KaTeX
        flowChart            : false,          // flowChart.js only support IE9+
        sequenceDiagram      : false,          // sequenceDiagram.js only support IE9+
        previewCodeHighlight : true,
                
        toolbar              : true,           // show/hide toolbar
        toolbarAutoFixed     : true,           // on window scroll auto fixed position
        toolbarIcons         : function() {
            return editormd.toolbarModes.full; // return array
        },   
        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",
            anchor           : "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",
            htmlEntities     : "fa-copyright",
            watch            : "fa-eye-slash",
            unwatch          : "fa-eye",
            preview          : "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/>A simple markdown doucment online editor.",
            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",
                anchor           : "锚点",
                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",
                htmlEntities     : "HTML实体字符",
                watch            : "关闭实时预览",
                unwatch          : "开启实时预览",
                preview          : "全窗口预览HTML（可按ESC还原）",
                fullscreen       : "全屏（按ESC还原）",
                clear            : "清空",
                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。"
                },
                anchor : {
                    title    : "添加锚点链接",
                    name     : "锚点名称",
                    url      : "链接地址",
                    urlTitle : "链接标题",
                    nameEmpty: "错误：锚点名称不能为空。",
                    titleEmpty : "错误：请填写锚点链接标题。",
                    urlEmpty : "错误：请填写锚点链接地址。"
                },
                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;

    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 || {};
            
            var _this            = this;
            var classPrefix      = this.classPrefix  = editormd.classPrefix;
            var editor           = this.editor       = $("#" + id);        
            var settings         = this.settings     = $.extend(true, editormd.defaults, options);
            
            this.id              = id;
            this.lang            = settings.lang;
            
            var classNames       = this.classNames   = {
                textarea : {
                    html     : this.classPrefix + "html-textarea",
                    markdown : this.classPrefix + "markdown-textarea"
                }
            };
            
            settings.pluginPath = (settings.pluginPath === "") ? this.settings.path + "../plugins/" : settings.pluginPath; 
            
            this.state.watching = (settings.watch) ? true : false;
            
            if (!editor.hasClass("editormd")) {
                editor.addClass("editormd");
            }
            
            editor.css({
                width  : (typeof settings.width  === "number") ? settings.width  + "px" : settings.width,
                height : (typeof settings.height === "number") ? settings.height + "px" : settings.height
            });
            
            if (settings.autoHeight)
            {
                editor.css("height", "auto");
            }
                        
            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("name", id + "-markdown-doc").attr("placeholder", settings.placeholder);
            
            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");
            
            this.mask = editor.children("." + classPrefix + "mask");
            
            if (settings.markdown !== "")
            {
                markdownTextarea.val(settings.markdown);
            }
            
            this.htmlTextarea         = editor.children("." + classNames.textarea.html);            
            this.preview              = editor.children("." + classPrefix + "preview");
            this.previewContainer     = this.preview.children("." + classPrefix + "preview-container");
            
            if (typeof define === "function" && define.amd)
            {
                if (typeof katex !== "undefined") 
                {
                    editormd.$katex = katex;
                }
                
                if (settings.searchReplace) 
                {
                    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();
                _this.setToolbar();
                _this.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)
            {
                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CodeMirror的主题
         * Setting CodeMirror theme
         * 
         * @returns {editormd}  返回editormd的实例对象
         */
        
        setTheme : function(theme) {  
            var settings   = this.settings;  
            settings.theme = theme;  
            
            if (theme !== "default")
            {
                editormd.loadCSS(settings.path + "codemirror/theme/" + settings.theme);
            }
            
            this.cm.setOption("theme", 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.theme !== "default")
            {
                editormd.loadCSS(settings.path + "codemirror/theme/" + settings.theme);
            }
            
            var codeMirrorConfig = {
                mode                      : settings.mode,
                theme                     : settings.theme,
                tabSize                   : 4,
                dragDrop                  : false,
                autofocus                 : true,
                autoCloseTags             : settings.autoCloseTags,
                readOnly                  : (settings.readOnly) ? "nocursor" : false,
                indentUnit                : 4,
                lineNumbers               : settings.lineNumbers,
                lineWrapping              : true,
                extraKeys                 : {"Ctrl-Q": function(cm){ cm.foldCode(cm.getCursor()); }},
                foldGutter                : settings.codeFold,
                gutters                   : ["CodeMirror-linenumbers", "CodeMirror-foldgutter"],
                matchBrackets             : true,
                indentWithTabs            : true,
                styleActiveLine           : settings.styleActiveLine,
                styleSelectedText         : true,
                autoCloseBrackets         : true,
                showTrailingSpace         : true,
                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);
            }

            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;
        },
        
        addKeyMap : function(map, bottom) {
            this.cm.addKeyMap(map, bottom);
            
            return this;
        },
        
        removeKeyMap : function(map) {
            this.cm.removeKeyMap(map);
            
            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.)
         */
        
        extends : 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 ;
            
            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 top = $(window).scrollTop();
                
                if (!settings.toolbarAutoFixed)
                {
                    return false;
                }

                if (top - editor.offset().top > 10)
                {
                    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);
            }
            
            if (!settings.toolbarAutoFixed)
            {
                $(window).unbind("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 ;
            
            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)
            {            
                editor.append('<div class="'+classPrefix+'toolbar"><div class="'+classPrefix+'toolbar-container"><ul class="'+classPrefix+'menu"></ul></div></div>');
                toolbar     = this.toolbar = editor.children("." + classPrefix + "toolbar");
            }
            
            if (!settings.toolbar) 
            {
                toolbar.hide();
                
                return ;
            } 
            
            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 = "";
            
            for (var i = 0, len = icons.length; i < len; i++)
            {
                var name = icons[i];
                
                if (name !== "|")
                {
                    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;
                    
                    menu += "<li>";
                    
                    if (typeof settings.toolbarCustomIcons[name] !== "undefined")
                    {
                        menu += settings.toolbarCustomIcons[name];
                    } 
                    else 
                    {                    
                        menu += "<a href=\"javascript:;\" title=\"" + title + "\" unselectable=\"on\">" +
                                "<i class=\"fa " + iconClass + "\" name=\""+name+"\" unselectable=\"on\">"+((isHeader) ? name : ( (iconClass === "") ? iconTexts : "") ) + "</i>" +
                                "</a>";
                    }
                    
                    menu += "</li>";
                }
                else
                {
                    menu += "<li class=\"divider\" unselectable=\"on\">|</li>";
                }
            }
            
            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 ;
            }
            
            var editor              = this.editor;
            var preview             = this.preview;
            var toolbar             = this.toolbar;
            var codeEditor          = this.codeEditor;
            var codeMirror          = this.codeMirror;
            var classPrefix         = this.classPrefix;
            var previewContainer    = this.previewContainer;            
            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              = codeEditor.getCursor();
                var selection           = codeEditor.getSelection();

                if (name === "") {
                    return ;
                }
                
                _this.activeIcon = icon;

                if (typeof toolbarIconHandlers[name] !== "undefined") 
                {
                    $.proxy(toolbarIconHandlers[name], _this)(codeEditor);
                }
                else 
                {
                    if (typeof settings.toolbarHandlers[name] !== "undefined") 
                    {
                        $.proxy(settings.toolbarHandlers[name], _this)(codeEditor, icon, cursor, selection);
                    }
                }
                
                if (name !== "link" && name !== "anchor" && name !== "image" && name !== "code-block" && 
                    name !== "preformatted-text" && name !== "watch" && name !== "preview" && name !== "fullscreen" && name !== "info") 
                {
                    codeEditor.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>Home page: <a href=\"" + editormd.homePage + "\" traget=\"_blank\">" + editormd.homePage + "</a></p>",
                "<p>License: MIT</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 classPrefix = this.classPrefix;            
			var infoDialog  = this.infoDialog = editor.children("." + 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);

            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;
            var toolbarIcons     = settings.toolbarIcons();  
            
            this.codeMirror.remove();
            
            this.setCodeMirror();
            
            if (typeof this.infoDialog !== "undefined") {
                this.infoDialog.remove();
            }
            
            if (typeof toolbarIcons["info"] !== "undefined") {
                createInfoDialog();
            }

            if (!settings.readOnly) 
            {                
                if (editor.find(".editormd-dialog").length > 0) {
                    editor.find(".editormd-dialog").remove();
                }
                
                if (settings.toolbar) 
                {  
                    this.getToolbarHandles();                  
                    this.setToolbar();
                }
            }
            
            this.saveToTextareas();
            this.resize();
            this.registerKeyMaps();

            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() {
            
            var previewContainer = this.previewContainer;
            
            previewContainer.find("." + editormd.classNames.tex).each(function(){
                var tex  = $(this);
                editormd.$katex.render(tex.html(), tex[0]);
            });   

            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 settings         = this.settings;
            var previewContainer = this.previewContainer;
            
            if (editormd.isIE8) return ;

            if (settings.flowChart) {
                previewContainer.find(".flowchart").flowChart(); 
            }

            if (settings.sequenceDiagram) {
                previewContainer.find(".sequence-diagram").sequenceDiagram({theme: "simple"});
            }

            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) {
            keyMap = keyMap || null;
            
            var _this    = this;
            var cm       = this.cm;
            var settings = this.settings;
            
            if (keyMap)
            {
                for (var i in keyMap)
                {
                    if ($.inArray(i, settings.disabledKeyMaps) < 0)
                    {
                        var map = {};
                        map[i]  = keyMap[i];

                        cm.addKeyMap(keyMap);
                    }
                }
            }
            else
            {
                for (var i in editormd.keyMaps)
                {
                    var keyMap = editormd.keyMaps[i];
                    var handle = (typeof keyMap === "string") ? $.proxy(editormd.toolbarHandlers[keyMap], _this) : $.proxy(keyMap, _this);
                    
                    if ($.inArray(i, ["F9", "F10", "F11"]) < 0 && $.inArray(i, settings.disabledKeyMaps) < 0)
                    {
                        var map = {};
                        map[i] = handle;

                        cm.addKeyMap(map);
                    }
                }
                
                $(window).keydown(function(event) {
                    
                    var keymaps = {
                        "120" : "F9",
                        "121" : "F10",
                        "122" : "F11"
                    };
                    
                    if ( $.inArray(keymaps[event.keyCode], settings.disabledKeyMaps) < 0 )
                    {
                        switch (event.keyCode)
                        {
                            case 120:
                                    $.proxy(editormd.toolbarHandlers["watch"], _this)();
                                    return false;
                                break;
                                
                            case 121:
                                    $.proxy(editormd.toolbarHandlers["preview"], _this)();
                                    return false;
                                break;
                                
                            case 122:
                                    $.proxy(editormd.toolbarHandlers["fullscreen"], _this)();
                                break;
                                
                            default:
                                break;
                        }
                    }
                });
            }

            return this;
        },
        
        /**
         * 加载队列完成之后的显示处理
         * Display handle of the module queues loaded after.
         * 
         * @returns {editormd}  返回editormd的实例对象
         */
        
        loadedDisplay : function() {
            
            var _this            = this;
            var editor           = this.editor;
            var preview          = this.preview;
            var settings         = this.settings;
            var codeEditor       = this.codeEditor;
            var codeMirror       = this.codeMirror;
            var previewContainer = this.previewContainer;
            var mouseOrTouch     = editormd.mouseOrTouch;
            
            editor.children("." + this.classPrefix  + "container-mask").hide();
            
            this.saveToTextareas();
            
            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();
            });
                
            var codeEditorBindScroll = 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);

                    if (scrollTop === 0) 
                    {
                        preview.scrollTop(0);
                    } 
                    else if (scrollTop + height >= $(this)[0].scrollHeight)
                    { 
                        preview.scrollTop(preview[0].scrollHeight);                        
                    } 
                    else
                    {                    
                        preview.scrollTop(preview[0].scrollHeight * percent);
                    }
                    
                    $.proxy(settings.onscroll, this)(event);
                });
            };

            var codeEditorUnbindScroll = function() {
                codeMirror.find(".CodeMirror-scroll").unbind(mouseOrTouch("scroll", "touchmove"));
            };

            var previewBindScroll = function() {
                preview.bind(mouseOrTouch("scroll", "touchmove"), function() {
                    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  : codeEditorBindScroll,
				mouseout   : codeEditorUnbindScroll,
				touchstart : codeEditorBindScroll,
				touchend   : codeEditorUnbindScroll
			});
            
			preview.bind({
				mouseover  : previewBindScroll,
				mouseout   : previewUnbindScroll,
				touchstart : previewBindScroll,
				touchend   : previewUnbindScroll
			});

            codeEditor.on("change", function(cm, changeObj) {                
                _this.previewContainer.css("padding-left", settings.autoHeight && $("body").height() > $(window).height() ? "30px" : "20px");
                _this.saveToTextareas();
            });
            
            $.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 codeEditor = this.codeEditor;
            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());
                }
            }
            
            codeMirror.find(".CodeMirror-gutters").height(codeMirror.height());
            
            if(settings.watch) 
            {
                codeMirror.width(editor.width() / 2);
                preview.width((!state.preview) ? editor.width() / 2 : editor.width());
                
                if (settings.toolbar && !settings.readOnly) 
                {
                    preview.css("top", toolbar.height());
                } 
                else 
                {
                    preview.css("top", 0);
                }
                
                if (settings.autoHeight && !state.fullscreen && !state.preview)
                {
                    preview.height("auto");
                }
                else
                {                
                    if (settings.toolbar && !settings.readOnly) 
                    {
                        preview.height(editor.height() - toolbar.height());
                    } 
                    else 
                    {
                        preview.height(editor.height());
                    }
                }
            } 
            else 
            {
                codeMirror.width(editor.width());
                preview.hide();
            }
            
            if (state.loaded) 
            {
                $.proxy(settings.onresize, this)();
            }

            return this;
        },
        
        /**
         * 分别将Markdown源码和解析的HTML源码保存到对应的textarea
         * Saving Markdown and HTML source code to Textarea
         * 
         * @returns {editormd}                    返回editormd的实例对象
         */
        
        saveToTextareas : function() {
            var _this            = this;
            var state            = this.state;
            var settings         = this.settings;
            var codeEditor       = this.codeEditor;
            var previewContainer = this.previewContainer;
            
            var codeMirrorValue  = codeEditor.getValue();

            if (settings.mode !== "gfm" && settings.mode !== "markdown") 
            {
                this.markdownTextarea[0].innerText = codeMirrorValue;
                
                return this;
            }
            
            var marked          = editormd.$marked;
            var markdownToC     = this.markdownToC = [];            
            var rendererOptions = this.markedRendererOptions = {  
                toc                  : settings.toc,
                tocStartLevel        : settings.tocStartLevel,
                taskList             : settings.taskList,
                emoji                : settings.emoji,
                tex                  : settings.tex,
                atLink               : settings.atLink,           // for @link
                emailLink            : settings.emailLink,        // for mail address auto link
                flowChart            : settings.flowChart,
                sequenceDiagram      : settings.sequenceDiagram,
                previewCodeHighlight : settings.previewCodeHighlight,
            };
            
            var markedOptions = this.markedOptions = {
                renderer    : editormd.markedRenderer(markdownToC, rendererOptions),
                gfm         : true,
                tables      : true,
                breaks      : true,
                pedantic    : false,
                sanitize    : (settings.htmlDecode) ? false : true,  // 关闭忽略HTML标签，即开启识别HTML标签，默认为false
                smartLists  : true,
                smartypants : true
            };
            
            marked.setOptions(markedOptions);
        
            codeMirrorValue    = editormd.filterHTMLTags(codeMirrorValue, settings.htmlDecode);
            
            var newMarkdownDoc = editormd.$marked(codeMirrorValue, markedOptions);
            
            this.markdownTextarea[0].innerText = codeMirrorValue;
            
            codeEditor.save();
            
            if (settings.saveHTMLToTextarea) 
            {
                this.htmlTextarea.html(newMarkdownDoc);
            }
            
            if(settings.watch || (!settings.watch && state.preview))
            {
                previewContainer.html(newMarkdownDoc);

                this.previewCodeHighlight();
            
                if (settings.toc) {
                    editormd.markdownToCRenderer(markdownToC, previewContainer, settings.tocStartLevel);
                }
                
                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)
                {
                    var timer = setTimeout(function(){
                        clearTimeout(timer);
                        _this.flowChartAndSequenceDiagramRender();
                    }, 10);
                }

                if (state.loaded) 
                {
                    $.proxy(settings.onchange, this)();
                }
            }

            return this;
        },
        
        /**
         * 聚焦光标位置
         * Focusing the cursor position
         * 
         * @returns {editormd}         返回editormd的实例对象
         */
        
        focus : function() {
            this.codeEditor.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.codeEditor.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.codeEditor.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.codeEditor.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.codeEditor.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.codeEditor.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;
        },
        
        /**
         * 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) {
            var settings = this.settings;
            
            this.codeEditor.setValue(md || 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.codeEditor.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.codeEditor.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.codeEditor.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.codeEditor.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.html();
        },
        
        /**
         * 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;       
            this.state.watching = settings.watch = true;
            this.preview.show();
            
            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); 
            
            this.saveToTextareas().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();
            
            var watchIcon   = settings.toolbarIconsClass.watch;
            var unWatchIcon = settings.toolbarIconsClass.unwatch;
            
            if (this.toolbar) 
            {
                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;
            
            if (settings.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.saveToTextareas();
                }

                preview.show().css({
                    position  : "static",
                    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 codeMirror       = this.codeMirror;
            var previewCloseBtn  = editor.find("." + this.classPrefix + "preview-close-btn");

            this.state.preview   = false;
            
            codeMirror.show();
            
            if (settings.toolbar) {
                toolbar.show();
            }

            if(this.settings.watch) {
                preview.show();
            } else {
                preview.hide();
            }
            
            previewCloseBtn.hide().unbind(editormd.mouseOrTouch("click", "touchend"));
            
            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 editor           = this.editor;
            var preview          = this.preview;
            var toolbar          = this.toolbar;
            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 (_this.state.fullscreen)
                    {
                        _this.fullscreenExit();
                    }
                }
            };

            if (!editor.hasClass(fullscreenClass)) 
            {
                this.state.fullscreen = true;

                $("html,body").css("overflow", "hidden");
                
                editor.css({
                    position : "fixed", 
                    top      : 0, 
                    left     : 0, 
                    margin   : 0, 
                    border   : "none",
                    width    : $(window).width(),
                    height   : $(window).height()
                }).addClass(fullscreenClass);

                this.resize();
    
                $.proxy(this.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 toolbar           = this.toolbar;
            var fullscreenClass   = this.classPrefix + "fullscreen";       
            this.state.fullscreen = true;
            
            if (toolbar) {
                toolbar.find(".fa[name=fullscreen]").parent().removeClass("active"); 
            }

            $("html,body").css("overflow", "");

            editor.css({
                position : "", 
                top      : "",
                left     : "", 
                margin   : "0 auto 15px", 
                width    : editor.data("oldWidth"),
                height   : editor.data("oldHeight"),
                border   : "1px solid #ddd"
            }).removeClass(fullscreenClass);

            this.resize();
            
            $.proxy(this.settings.onfullscreenExit, this)();

            return this;
        },
        
        executePlugin : function(name, path) {
            
            var _this    = this;
            var cm       = this.cm;
            var settings = this.settings;
            
            if (typeof define == "function") {
                
                this[name](cm);
                
                return ;
            }
            
            path = settings.pluginPath + path;
            
            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);
            }
        }
    };
    
    editormd.fn.init.prototype = editormd.fn; 
            
    editormd.dialogLockScreen = function() {
        var settings = this.settings;
        
        if (settings.dialogLockScreen) 
        {
            $("html,body").css("overflow", "hidden");
        }
    };

    editormd.dialogShowMask = function(dialog) {
        var editor   = this.editor;
        var settings = this.settings;
        
        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();

            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 selection = cm.getSelection();

            cm.replaceSelection("# " + selection);
        },

        h2 : function() {
            var cm        = this.cm;
            var selection = cm.getSelection();

            cm.replaceSelection("## " + selection);
        },

        h3 : function() {
            var cm        = this.cm;
            var selection = cm.getSelection();

            cm.replaceSelection("### " + selection);
        },

        h4 : function() {
            var cm        = this.cm;
            var selection = cm.getSelection();

            cm.replaceSelection("#### " + selection);
        },

        h5 : function() {
            var cm        = this.cm;
            var selection = cm.getSelection();

            cm.replaceSelection("##### " + selection);
        },

        h6 : function() {
            var cm        = this.cm;
            var selection = cm.getSelection();

            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("------------");
        },

        link : function() {
            this.executePlugin("linkDialog", "link-dialog/link-dialog");
        },

        anchor : function() {
            this.executePlugin("anchorLinkDialog", "anchor-link-dialog/anchor-link-dialog");
        },

        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");
        },
                
        htmlEntities : function() {
            this.executePlugin("htmlEntitiesDialog", "html-entities-dialog/html-entities-dialog");
        },

        watch : function() {    
            this[this.settings.watch ? "unwatch" : "watch"]();
        },

        preview : function() {
            this.previewing();
        },

        fullscreen : function() {
            this.fullscreen();
        },

        clear : function() {
            this.clear();
        },

        help : function() {
            this.executePlugin("helpDialog", "help-dialog/help-dialog");
        },

        info : function() {
            this.showInfoDialog();
        }
    };
    
    editormd.keyMaps = {
        "Ctrl-B"       : "bold",  // if this is string ==  editormd.toolbarHandlers.xxxx
        "Ctrl-I"       : "italic",
        "Ctrl-K"       : "code",
        "Shift-Ctrl-C" : "code",
        "Shift-Ctrl-Q" : "quote",
        "Shift-Ctrl-S" : "del",
        "Ctrl-H"       : "hr",
        "Ctrl-1"       : "h1",
        "Ctrl-2"       : "h2",
        "Ctrl-3"       : "h3",
        "Ctrl-4"       : "h4",
        "Ctrl-5"       : "h5",
        "Ctrl-6"       : "h6",
        "Ctrl-D"       : "datetime",
        
        "Ctrl-E"       : function() { // emoji
            var cm        = this.cm;
            var cursor    = cm.getCursor();
            var selection = cm.getSelection();

            cm.replaceSelection(":" + selection + ":");

            if (selection === "") {
                cm.setCursor(cursor.line, cursor.ch + 1);
            }
        },
        
        "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();

            cm.replaceSelection("@" + selection);

            if (selection === "") {
                cm.setCursor(cursor.line, cursor.ch + 1);
            }
        },
        
        "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"     : "htmlEntities",
        "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",
        "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,
        twemoji      : /:(tw-([\w]+)-?(\w+)?):/g,
        fontAwesome  : /:(fa-([\w]+)(-(\w+)){0,}):/g,
        editormdLogo : /:(editormd-logo-?(\w+)?):/g
    };
    
    // 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
            tocStartLevel        : 1,              // Said from H1 to create ToC  
            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 atLinkReg       = editormd.regexs.atLink;
        var emojiReg        = editormd.regexs.emoji;
        var emailReg        = editormd.regexs.email;
        var emailLinkReg    = editormd.regexs.emailLink;
        var twemojiReg      = editormd.regexs.twemoji;
        var faIconReg       = editormd.regexs.fontAwesome;
        var editormdLogoReg = editormd.regexs.editormdLogo;

        markedRenderer.emoji = function(text) {
            var matchs = text.match(emojiReg);

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

            for (var i = 0, len = matchs.length; i < len; i++)
            {
                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
                        {
                            return "<img src=\"" + editormd.emoji.path + name + 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) {
                        return (!$2) ? "<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=\"anchor\"></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.paragraph = function(text) {
            var isTeXInline     = /\$\$(.*)\$\$/g.test(text);
            var isTeXLine       = /^\$\$(.*)\$\$$/.test(text);
            var isTeXAddClass   = (isTeXLine) ? " class=\"" + editormd.classNames.tex + "\"" : "";
            var isToC           = /^\[TOC\]$/.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;
            }
            
            return (isToC) ? "<div class=\"markdown-toc\"><ul class=\"markdown-toc-list\">" + text + "</ul></div>" 
                           : "<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 
            {

                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, startLevel) {
        
        var html       = "";    
        var lastLevel  = 0;
        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');
        
        tocContainer.children('.markdown-toc-list').html("").html(html);
        
        return tocContainer;
    };
    
    /**
     * 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 filters === "string")
        {
            var filterTags = filters.split(",");

            for (var i = 0, len = filterTags.length; i < len; i++)
            {
                var tag = filterTags[i];

                html = html.replace(new RegExp("\<\s*"+tag+"\s*([^\>]*)\>", "igm"), "").replace(new RegExp("\<\s*\/"+tag+"\s*\>", "igm"), "");
            }
        }
        
        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,
            tocStartLevel        : 1,
            markdown             : "",
            htmlDecode           : false,
            autoLoadKaTeX        : true,
            atLink               : true,    // for @link
            emailLink            : true,    // for mail address auto link
            tex                  : false,
            taskList             : false,   // Github Flavored Markdown task lists
            emoji                : false,
            flowChart            : false,
            sequenceDiagram      : false,
            previewCodeHighlight : true
        };
        
        editormd.$marked  = marked;

        var div           = $("#" + id);
        var settings      = div.settings = $.extend(true, defaults, options || {});
        var saveTo        = div.find("textarea");
        var markdownDoc   = (settings.markdown === "") ? saveTo.val() : settings.markdown; 
        var markdownToC   = [];

        var rendererOptions = {  
            toc                  : settings.toc,
            tocStartLevel        : settings.tocStartLevel,
            taskList             : settings.taskList,
            emoji                : settings.emoji,
            tex                  : settings.tex,
            atLink               : settings.atLink,           // for @link
            emailLink            : settings.emailLink,        // for mail address auto link
            flowChart            : settings.flowChart,
            sequenceDiagram      : settings.sequenceDiagram,
            previewCodeHighlight : settings.previewCodeHighlight,
        };

        var markedOptions = {
            renderer    : editormd.markedRenderer(markdownToC, rendererOptions),
            gfm         : settings.gfm,
            tables      : true,
            breaks      : true,
            pedantic    : false,
            sanitize    : (settings.htmlDecode) ? false : true, // 是否忽略HTML标签，即是否开启HTML标签解析，为了安全性，默认不开启
            smartLists  : true,
            smartypants : true
        };
        
        markdownDoc = editormd.filterHTMLTags(markdownDoc, settings.htmlDecode);
        
        var markdownParsed   = marked(markdownDoc, markedOptions);
        
        if (editormd.isIE8) 
        {
            saveTo.val(markdownDoc);
        }
        else 
        {
            saveTo.html(markdownDoc);
        }
        
        div.addClass("markdown-body " + this.classPrefix + "html-preview").append(markdownParsed);
         
        if (settings.toc) {
            div.tocContainer = this.markdownToCRenderer(markdownToC, div, settings.tocStartLevel);
        }
            
        if (settings.previewCodeHighlight) 
        {
            div.find("pre").addClass("prettyprint linenums");
            prettyPrint();
        }
        
        if (!editormd.isIE8) 
        {
            if (settings.flowChart) {
                div.find(".flowchart").flowChart(); 
            }

            if (settings.sequenceDiagram) {
                div.find(".sequence-diagram").sequenceDiagram({theme: "simple"});
            }
        }

        if (settings.tex)
        {
            var katexHandle = function() {
                div.find("." + editormd.classNames.tex).each(function(){
                    var tex  = $(this);
                    katex.render(tex.html(), tex[0]);
                });
            };
            
            if (settings.autoLoadKaTeX && !editormd.$katex && !editormd.kaTeXLoaded)
            {
                this.loadKaTeX(function() {
                    editormd.$katex      = katex;
                    editormd.kaTeXLoaded = true;
                    katexHandle();
                });
            }
            else
            {
                katexHandle();
            }
        }
        
        div.getMarkdown = function() {
            return (editormd.isIE8) ? saveTo.val() : saveTo.html();
        };
        
        return div;
    };
    
    editormd.themes = [
        "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 : "http://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.1.1/katex.min",
        js  : "http://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.1.1/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 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" : "");
            }

            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;

        try
        {
            document.createEvent("TouchEvent");
            eventType = touchEventType;
        }  
        catch(e) {
        } 

        return eventType;
    };
    
    /**
     * 日期时间的格式化方法
     * Datetime format method
     * 
     * @param   {String}   [format=""]  日期时间的格式，类似PHP的格式
     * @returns {String}   datefmt      返回格式化后的日期时间字符串
     */
    
    editormd.dateFormat = function(format) {                
        format      = format || "";

        var addZero = function(d) {
            return (d < 10) ? "0" + d : d;
        };

        var date    = new Date; 
        var year    = date.getFullYear();
        var year2   = year.toString().slice(2, 4);
        var month   = addZero(date.getMonth() + 1);
        var day     = addZero(date.getDate());
        var weekDay = date.getDay();
        var hour    = addZero(date.getHours());
        var min     = addZero(date.getMinutes());
        var second  = addZero(date.getSeconds());
        var ms      = addZero(date.getMilliseconds()); 
        var datefmt = "";

        var ymd     = year2 + "-" + month + "-" + day;
        var fymd    = year  + "-" + month + "-" + day;
        var hms     = hour  + ":" + min   + ":" + second;

        switch (format) 
        {
            case "UNIX Time" :
                    datefmt = date.getTime();
                break;

            case "UTC" :
                    datefmt = date.toUTCString();
                break;	

            case "yy" :
                    datefmt = year2;
                break;	

            case "year" :
            case "yyyy" :
                    datefmt = year;
                break;

            case "month" :
            case "mm" :
                    datefmt = month;
                break;                        

            case "cn-week-day" :
            case "cn-wd" :
                    var cnWeekDays = ["日", "一", "二", "三", "四", "五", "六"];
                    datefmt = "星期" + cnWeekDays[weekDay];
                break;

            case "week-day" :
            case "wd" :
                    var weekDays = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
                    datefmt = weekDays[weekDay];
                break;

            case "day" :
            case "dd" :
                    datefmt = day;
                break;

            case "hour" :
            case "hh" :
                    datefmt = hour;
                break;

            case "min" :
            case "ii" :
                    datefmt = min;
                break;

            case "second" :
            case "ss" :
                    datefmt = second;
                break;

            case "ms" :
                    datefmt = ms;
                break;	

            case "yy-mm-dd" :
                    datefmt = ymd;
                break;

            case "yyyy-mm-dd" :
                    datefmt = fymd;
                break;

            case "yyyy-mm-dd h:i:s ms" :
            case "full + ms" : 
                    datefmt = fymd + " " + hms + " " + ms;
                break;	

            case "full" :
            case "yyyy-mm-dd h:i:s" :
                default:
                    datefmt = fymd + " " + hms;
                break;	
        };

        return datefmt;
    };
    
    return editormd;
    
}));