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/* ===================================================
 * bootstrap-markdown.js v2.10.0
 * http://github.com/toopay/bootstrap-markdown
 * ===================================================
 * Copyright 2013-2016 Taufan Aditya
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ========================================================== */

(function(factory){
  if (typeof define === "function" && define.amd) {
      //RequireJS
      define(["jquery"], factory);
  } else if (typeof exports === 'object') {
      //Backbone.js
      factory(require('jquery'));
  } else {
      //Jquery plugin
      factory(jQuery);
  }
}(function($){
"use strict"; // jshint ;_;

/* MARKDOWN CLASS DEFINITION
 * ========================== */

var Markdown = function (element, options) {
  // @TODO : remove this BC on next major release
  // @see : https://github.com/toopay/bootstrap-markdown/issues/109
  var opts = ['autofocus', 'savable', 'hideable', 'width', 
    'height', 'resize', 'iconlibrary', 'language', 
    'footer', 'fullscreen', 'hiddenButtons', 'disabledButtons'];
  $.each(opts,function(_, opt){
    if (typeof $(element).data(opt) !== 'undefined') {
      options = typeof options == 'object' ? options : {}
      options[opt] = $(element).data(opt)
    }
  });
  // End BC

  // Class Properties
  this.$ns           = 'bootstrap-markdown';
  this.$element      = $(element);
  this.$editable     = {el:null, type:null,attrKeys:[], attrValues:[], content:null};
  this.$options      = $.extend(true, {}, $.fn.markdown.defaults, options, this.$element.data('options'));
  this.$oldContent   = null;
  this.$isPreview    = false;
  this.$isFullscreen = false;
  this.$editor       = null;
  this.$textarea     = null;
  this.$handler      = [];
  this.$callback     = [];
  this.$nextTab      = [];

  this.showEditor();
};

Markdown.prototype = {

  constructor: Markdown

, __alterButtons: function(name,alter) {
    var handler = this.$handler, isAll = (name == 'all'),that = this;

    $.each(handler,function(k,v) {
      var halt = true;
      if (isAll) {
        halt = false;
      } else {
        halt = v.indexOf(name) < 0;
      }

      if (halt === false) {
        alter(that.$editor.find('button[data-handler="'+v+'"]'));
      }
    });
  }

, __buildButtons: function(buttonsArray, container) {
    var i,
        ns = this.$ns,
        handler = this.$handler,
        callback = this.$callback;

    for (i=0;i<buttonsArray.length;i++) {
      // Build each group container
      var y, btnGroups = buttonsArray[i];
      for (y=0;y<btnGroups.length;y++) {
        // Build each button group
        var z,
            buttons = btnGroups[y].data,
            btnGroupContainer = $('<div/>', {
                                  'class': 'btn-group'
                                });

        for (z=0;z<buttons.length;z++) {
          var button = buttons[z],
              buttonContainer, buttonIconContainer,
              buttonHandler = ns+'-'+button.name,
              buttonIcon = this.__getIcon(button.icon),
              btnText = button.btnText ? button.btnText : '',
              btnClass = button.btnClass ? button.btnClass : 'btn',
              tabIndex = button.tabIndex ? button.tabIndex : '-1',
              hotkey = typeof button.hotkey !== 'undefined' ? button.hotkey : '',
              hotkeyCaption = typeof jQuery.hotkeys !== 'undefined' && hotkey !== '' ? ' ('+hotkey+')' : '';

          // Construct the button object
          buttonContainer = $('<button></button>');
          buttonContainer.text(' ' + this.__localize(btnText)).addClass('btn-default').addClass(btnClass);
          if(btnClass.match(/btn\-(primary|success|info|warning|danger|link)/)){
              buttonContainer.removeClass('btn-default');
          }
          buttonContainer.attr({
              'type': 'button',
              'title': this.__localize(button.title) + hotkeyCaption,
              'tabindex': tabIndex,
              'data-provider': ns,
              'data-handler': buttonHandler,
              'data-hotkey': hotkey
          });
          if (button.toggle === true){
            buttonContainer.attr('data-toggle', 'button');
          }
          buttonIconContainer = $('<span/>');
          buttonIconContainer.addClass(buttonIcon);
          buttonIconContainer.prependTo(buttonContainer);

          // Attach the button object
          btnGroupContainer.append(buttonContainer);

          // Register handler and callback
          handler.push(buttonHandler);
          callback.push(button.callback);
        }

        // Attach the button group into container dom
        container.append(btnGroupContainer);
      }
    }

    return container;
  }
, __setListener: function() {
    // Set size and resizable Properties
    var hasRows = typeof this.$textarea.attr('rows') !== 'undefined',
        maxRows = this.$textarea.val().split("\n").length > 5 ? this.$textarea.val().split("\n").length : '5',
        rowsVal = hasRows ? this.$textarea.attr('rows') : maxRows;

    this.$textarea.attr('rows',rowsVal);
    if (this.$options.resize) {
      this.$textarea.css('resize',this.$options.resize);
    }

    this.$textarea.on({
        'focus' : $.proxy(this.focus, this),
        'keyup' : $.proxy(this.keyup, this),
        'change' : $.proxy(this.change, this),
        'select' : $.proxy(this.select, this)
    });

    if (this.eventSupported('keydown')) {
      this.$textarea.on('keydown', $.proxy(this.keydown, this));
    }

    if (this.eventSupported('keypress')) {
      this.$textarea.on('keypress', $.proxy(this.keypress, this))
    }

    // Re-attach markdown data
    this.$textarea.data('markdown',this);
  }

, __handle: function(e) {
    var target = $(e.currentTarget),
        handler = this.$handler,
        callback = this.$callback,
        handlerName = target.attr('data-handler'),
        callbackIndex = handler.indexOf(handlerName),
        callbackHandler = callback[callbackIndex];

    // Trigger the focusin
    $(e.currentTarget).focus();

    callbackHandler(this);

    // Trigger onChange for each button handle
    this.change(this);

    // Unless it was the save handler,
    // focusin the textarea
    if (handlerName.indexOf('cmdSave') < 0) {
      this.$textarea.focus();
    }

    e.preventDefault();
  }

, __localize: function(string) {
    var messages = $.fn.markdown.messages,
        language = this.$options.language;
    if (
      typeof messages !== 'undefined' &&
      typeof messages[language] !== 'undefined' &&
      typeof messages[language][string] !== 'undefined'
    ) {
      return messages[language][string];
    }
    return string;
  }

, __getIcon: function(src) {
  return typeof src == 'object' ? src[this.$options.iconlibrary] : src;
}

, setFullscreen: function(mode) {
  var $editor = this.$editor,
      $textarea = this.$textarea;

  if (mode === true) {
    $editor.addClass('md-fullscreen-mode');
    $('body').addClass('md-nooverflow');
    this.$options.onFullscreen(this);
  } else {
    $editor.removeClass('md-fullscreen-mode');
    $('body').removeClass('md-nooverflow');

    if (this.$isPreview == true) this.hidePreview().showPreview()
  }

  this.$isFullscreen = mode;
  $textarea.focus();
}

, showEditor: function() {
    var instance = this,
        textarea,
        ns = this.$ns,
        container = this.$element,
        originalHeigth = container.css('height'),
        originalWidth = container.css('width'),
        editable = this.$editable,
        handler = this.$handler,
        callback = this.$callback,
        options = this.$options,
        editor = $( '<div/>', {
                    'class': 'md-editor',
                    click: function() {
                      instance.focus();
                    }
                  });

    // Prepare the editor
    if (this.$editor === null) {
      // Create the panel
      var editorHeader = $('<div/>', {
                          'class': 'md-header btn-toolbar'
                          });

      // Merge the main & additional button groups together
      var allBtnGroups = [];
      if (options.buttons.length > 0) allBtnGroups = allBtnGroups.concat(options.buttons[0]);
      if (options.additionalButtons.length > 0) {
        // iterate the additional button groups
        $.each(options.additionalButtons[0], function(idx, buttonGroup){
          
          // see if the group name of the addional group matches an existing group
          var matchingGroups = $.grep(allBtnGroups, function(allButtonGroup, allIdx){
            return allButtonGroup.name === buttonGroup.name;
          });

          // if it matches add the addional buttons to that group, if not just add it to the all buttons group
          if(matchingGroups.length > 0) {
            matchingGroups[0].data = matchingGroups[0].data.concat(buttonGroup.data);
          } else {              
            allBtnGroups.push(options.additionalButtons[0][idx]);
          }

        });
      } 

      // Reduce and/or reorder the button groups
      if (options.reorderButtonGroups.length > 0) {
        allBtnGroups = allBtnGroups
            .filter(function(btnGroup) {
              return options.reorderButtonGroups.indexOf(btnGroup.name) > -1;
            })
            .sort(function(a, b) {
              if (options.reorderButtonGroups.indexOf(a.name) < options.reorderButtonGroups.indexOf(b.name)) return -1;
              if (options.reorderButtonGroups.indexOf(a.name) > options.reorderButtonGroups.indexOf(b.name)) return 1;
              return 0;
            });
      }

      // Build the buttons
      if (allBtnGroups.length > 0) {
        editorHeader = this.__buildButtons([allBtnGroups], editorHeader);
      }

      if (options.fullscreen.enable) {
        editorHeader.append('<div class="md-controls"><a class="md-control md-control-fullscreen" href="#"><span class="'+this.__getIcon(options.fullscreen.icons.fullscreenOn)+'"></span></a></div>').on('click', '.md-control-fullscreen', function(e) {
            e.preventDefault();
            instance.setFullscreen(true);
        });
      }

      editor.append(editorHeader);

      // Wrap the textarea
      if (container.is('textarea')) {
        container.before(editor);
        textarea = container;
        textarea.addClass('md-input');
        editor.append(textarea);
      } else {
        var rawContent = (typeof toMarkdown == 'function') ? toMarkdown(container.html()) : container.html(),
            currentContent = $.trim(rawContent);

        // This is some arbitrary content that could be edited
        textarea = $('<textarea/>', {
                     'class': 'md-input',
                     'val' : currentContent
                    });

        editor.append(textarea);

        // Save the editable
        editable.el = container;
        editable.type = container.prop('tagName').toLowerCase();
        editable.content = container.html();

        $(container[0].attributes).each(function(){
          editable.attrKeys.push(this.nodeName);
          editable.attrValues.push(this.nodeValue);
        });

        // Set editor to blocked the original container
        container.replaceWith(editor);
      }

      var editorFooter = $('<div/>', {
                         'class': 'md-footer'
                       }),
          createFooter = false,
          footer = '';
      // Create the footer if savable
      if (options.savable) {
        createFooter = true;
        var saveHandler = 'cmdSave';

        // Register handler and callback
        handler.push(saveHandler);
        callback.push(options.onSave);

        editorFooter.append('<button class="btn btn-success" data-provider="'
                            + ns
                            + '" data-handler="'
                            + saveHandler
                            + '"><i class="icon icon-white icon-ok"></i> '
                            + this.__localize('Save')
                            + '</button>');


      }

      footer = typeof options.footer === 'function' ? options.footer(this) : options.footer;

      if ($.trim(footer) !== '') {
        createFooter = true;
        editorFooter.append(footer);
      }

      if (createFooter) editor.append(editorFooter);

      // Set width
      if (options.width && options.width !== 'inherit') {
        if (jQuery.isNumeric(options.width)) {
          editor.css('display', 'table');
          textarea.css('width', options.width + 'px');
        } else {
          editor.addClass(options.width);
        }
      }

      // Set height
      if (options.height && options.height !== 'inherit') {
        if (jQuery.isNumeric(options.height)) {
          var height = options.height;
          if (editorHeader) height = Math.max(0, height - editorHeader.outerHeight());
          if (editorFooter) height = Math.max(0, height - editorFooter.outerHeight());
          textarea.css('height', height + 'px');
        } else {
          editor.addClass(options.height);
        }
      }

      // Reference
      this.$editor     = editor;
      this.$textarea   = textarea;
      this.$editable   = editable;
      this.$oldContent = this.getContent();

      this.__setListener();

      // Set editor attributes, data short-hand API and listener
      this.$editor.attr('id',(new Date()).getTime());
      this.$editor.on('click', '[data-provider="bootstrap-markdown"]', $.proxy(this.__handle, this));

      if (this.$element.is(':disabled') || this.$element.is('[readonly]')) {
        this.$editor.addClass('md-editor-disabled');
        this.disableButtons('all');
      }

      if (this.eventSupported('keydown') && typeof jQuery.hotkeys === 'object') {
        editorHeader.find('[data-provider="bootstrap-markdown"]').each(function() {
          var $button = $(this),
              hotkey = $button.attr('data-hotkey');
          if (hotkey.toLowerCase() !== '') {
            textarea.bind('keydown', hotkey, function() {
              $button.trigger('click');
              return false;
            });
          }
        });
      }

      if (options.initialstate === 'preview') {
        this.showPreview();
      } else if (options.initialstate === 'fullscreen' && options.fullscreen.enable) {
        this.setFullscreen(true);
      }

    } else {
      this.$editor.show();
    }

    if (options.autofocus) {
      this.$textarea.focus();
      this.$editor.addClass('active');
    }

    if (options.fullscreen.enable && options.fullscreen !== false) {
      this.$editor.append('<div class="md-fullscreen-controls">'
                      + '<a href="#" class="exit-fullscreen" title="Exit fullscreen"><span class="' + this.__getIcon(options.fullscreen.icons.fullscreenOff) + '">'
                      + '</span></a>'
                      + '</div>');
      this.$editor.on('click', '.exit-fullscreen', function(e) {
        e.preventDefault();
        instance.setFullscreen(false);
      });
    }

    // hide hidden buttons from options
    this.hideButtons(options.hiddenButtons);

    // disable disabled buttons from options
    this.disableButtons(options.disabledButtons);

    // Trigger the onShow hook
    options.onShow(this);

    return this;
  }

, parseContent: function(val) {
    var content;

    // parse with supported markdown parser
    var val = val || this.$textarea.val();

    if (this.$options.parser) {
      content = this.$options.parser(val);
    } else if (typeof markdown == 'object') {
      content = markdown.toHTML(val);
    } else if (typeof marked == 'function') {
      content = marked(val);
    } else {
      content = val;
    }

    return content;
  }

, showPreview: function() {
    var options = this.$options,
        container = this.$textarea,
        afterContainer = container.next(),
        replacementContainer = $('<div/>',{'class':'md-preview','data-provider':'markdown-preview'}),
        content,
        callbackContent;

    if (this.$isPreview == true) {
      // Avoid sequenced element creation on missused scenario
      // @see https://github.com/toopay/bootstrap-markdown/issues/170
      return this;
    }
    
    // Give flag that tell the editor enter preview mode
    this.$isPreview = true;
    // Disable all buttons
    this.disableButtons('all').enableButtons('cmdPreview');

    // Try to get the content from callback
    callbackContent = options.onPreview(this);
    // Set the content based from the callback content if string otherwise parse value from textarea
    content = typeof callbackContent == 'string' ? callbackContent : this.parseContent();

    // Build preview element
    replacementContainer.html(content);

    if (afterContainer && afterContainer.attr('class') == 'md-footer') {
      // If there is footer element, insert the preview container before it
      replacementContainer.insertBefore(afterContainer);
    } else {
      // Otherwise, just append it after textarea
      container.parent().append(replacementContainer);
    }

    // Set the preview element dimensions
    replacementContainer.css({
      width: container.outerWidth() + 'px',
      height: container.outerHeight() + 'px'
    });

    if (this.$options.resize) {
      replacementContainer.css('resize',this.$options.resize);
    }

    // Hide the last-active textarea
    container.hide();

    // Attach the editor instances
    replacementContainer.data('markdown',this);

    if (this.$element.is(':disabled') || this.$element.is('[readonly]')) {
      this.$editor.addClass('md-editor-disabled');
      this.disableButtons('all');
    }

    return this;
  }

, hidePreview: function() {
    // Give flag that tell the editor quit preview mode
    this.$isPreview = false;

    // Obtain the preview container
    var container = this.$editor.find('div[data-provider="markdown-preview"]');

    // Remove the preview container
    container.remove();

    // Enable all buttons
    this.enableButtons('all');
    // Disable configured disabled buttons
    this.disableButtons(this.$options.disabledButtons);

    // Back to the editor
    this.$textarea.show();
    this.__setListener();

    return this;
  }

, isDirty: function() {
    return this.$oldContent != this.getContent();
  }

, getContent: function() {
    return this.$textarea.val();
  }

, setContent: function(content) {
    this.$textarea.val(content);

    return this;
  }

, findSelection: function(chunk) {
  var content = this.getContent(), startChunkPosition;

  if (startChunkPosition = content.indexOf(chunk), startChunkPosition >= 0 && chunk.length > 0) {
    var oldSelection = this.getSelection(), selection;

    this.setSelection(startChunkPosition,startChunkPosition+chunk.length);
    selection = this.getSelection();

    this.setSelection(oldSelection.start,oldSelection.end);

    return selection;
  } else {
    return null;
  }
}

, getSelection: function() {

    var e = this.$textarea[0];

    return (

        ('selectionStart' in e && function() {
            var l = e.selectionEnd - e.selectionStart;
            return { start: e.selectionStart, end: e.selectionEnd, length: l, text: e.value.substr(e.selectionStart, l) };
        }) ||

        /* browser not supported */
        function() {
          return null;
        }

    )();

  }

, setSelection: function(start,end) {

    var e = this.$textarea[0];

    return (

        ('selectionStart' in e && function() {
            e.selectionStart = start;
            e.selectionEnd = end;
            return;
        }) ||

        /* browser not supported */
        function() {
          return null;
        }

    )();

  }

, replaceSelection: function(text) {

    var e = this.$textarea[0];

    return (

        ('selectionStart' in e && function() {
            e.value = e.value.substr(0, e.selectionStart) + text + e.value.substr(e.selectionEnd, e.value.length);
            // Set cursor to the last replacement end
            e.selectionStart = e.value.length;
            return this;
        }) ||

        /* browser not supported */
        function() {
            e.value += text;
            return jQuery(e);
        }

    )();
  }

, getNextTab: function() {
    // Shift the nextTab
    if (this.$nextTab.length === 0) {
      return null;
    } else {
      var nextTab, tab = this.$nextTab.shift();

      if (typeof tab == 'function') {
        nextTab = tab();
      } else if (typeof tab == 'object' && tab.length > 0) {
        nextTab = tab;
      }

      return nextTab;
    }
  }

, setNextTab: function(start,end) {
    // Push new selection into nextTab collections
    if (typeof start == 'string') {
      var that = this;
      this.$nextTab.push(function(){
        return that.findSelection(start);
      });
    } else if (typeof start == 'number' && typeof end == 'number') {
      var oldSelection = this.getSelection();

      this.setSelection(start,end);
      this.$nextTab.push(this.getSelection());

      this.setSelection(oldSelection.start,oldSelection.end);
    }

    return;
  }

, __parseButtonNameParam: function (names) {
    return typeof names == 'string' ?
                    names.split(' ') :
                    names;

  }

, enableButtons: function(name) {
    var buttons = this.__parseButtonNameParam(name),
      that = this;

    $.each(buttons, function(i, v) {
      that.__alterButtons(buttons[i], function (el) {
        el.removeAttr('disabled');
      });
    });

    return this;
  }

, disableButtons: function(name) {
    var buttons = this.__parseButtonNameParam(name),
      that = this;

    $.each(buttons, function(i, v) {
      that.__alterButtons(buttons[i], function (el) {
        el.attr('disabled','disabled');
      });
    });

    return this;
  }

, hideButtons: function(name) {
    var buttons = this.__parseButtonNameParam(name),
      that = this;

    $.each(buttons, function(i, v) {
      that.__alterButtons(buttons[i], function (el) {
        el.addClass('hidden');
      });
    });

    return this;
  }

, showButtons: function(name) {
    var buttons = this.__parseButtonNameParam(name),
      that = this;

    $.each(buttons, function(i, v) {
      that.__alterButtons(buttons[i], function (el) {
        el.removeClass('hidden');
      });
    });

    return this;
  }

, eventSupported: function(eventName) {
    var isSupported = eventName in this.$element;
    if (!isSupported) {
      this.$element.setAttribute(eventName, 'return;');
      isSupported = typeof this.$element[eventName] === 'function';
    }
    return isSupported;
  }

, keyup: function (e) {
    var blocked = false;
    switch(e.keyCode) {
      case 40: // down arrow
      case 38: // up arrow
      case 16: // shift
      case 17: // ctrl
      case 18: // alt
        break;

      case 9: // tab
        var nextTab;
        if (nextTab = this.getNextTab(),nextTab !== null) {
          // Get the nextTab if exists
          var that = this;
          setTimeout(function(){
            that.setSelection(nextTab.start,nextTab.end);
          },500);

          blocked = true;
        } else {
          // The next tab memory contains nothing...
          // check the cursor position to determine tab action
          var cursor = this.getSelection();

          if (cursor.start == cursor.end && cursor.end == this.getContent().length) {
            // The cursor already reach the end of the content
            blocked = false;
          } else {
            // Put the cursor to the end
            this.setSelection(this.getContent().length,this.getContent().length);

            blocked = true;
          }
        }

        break;

      case 13: // enter
        blocked = false;
        break;
      case 27: // escape
        if (this.$isFullscreen) this.setFullscreen(false);
        blocked = false;
        break;

      default:
        blocked = false;
    }

    if (blocked) {
      e.stopPropagation();
      e.preventDefault();
    }

    this.$options.onChange(this);
  }

, change: function(e) {
    this.$options.onChange(this);
    return this;
  }
, select: function (e) {
    this.$options.onSelect(this);
    return this;
  }
, focus: function (e) {
    var options = this.$options,
        isHideable = options.hideable,
        editor = this.$editor;

    editor.addClass('active');

    // Blur other markdown(s)
    $(document).find('.md-editor').each(function(){
      if ($(this).attr('id') !== editor.attr('id')) {
        var attachedMarkdown;

        if (attachedMarkdown = $(this).find('textarea').data('markdown'),
            attachedMarkdown === null) {
            attachedMarkdown = $(this).find('div[data-provider="markdown-preview"]').data('markdown');
        }

        if (attachedMarkdown) {
          attachedMarkdown.blur();
        }
      }
    });

    // Trigger the onFocus hook
    options.onFocus(this);

    return this;
  }

, blur: function (e) {
    var options = this.$options,
        isHideable = options.hideable,
        editor = this.$editor,
        editable = this.$editable;

    if (editor.hasClass('active') || this.$element.parent().length === 0) {
      editor.removeClass('active');

      if (isHideable) {
        // Check for editable elements
        if (editable.el !== null) {
          // Build the original element
          var oldElement = $('<'+editable.type+'/>'),
              content = this.getContent(),
              currentContent = this.parseContent(content);

          $(editable.attrKeys).each(function(k,v) {
            oldElement.attr(editable.attrKeys[k],editable.attrValues[k]);
          });

          // Get the editor content
          oldElement.html(currentContent);

          editor.replaceWith(oldElement);
        } else {
          editor.hide();
        }
      }

      // Trigger the onBlur hook
      options.onBlur(this);
    }

    return this;
  }

};

/* MARKDOWN PLUGIN DEFINITION
* ========================== */

var old = $.fn.markdown;

$.fn.markdown = function (option) {
  return this.each(function () {
    var $this = $(this)
      , data = $this.data('markdown')
      , options = typeof option == 'object' && option;
    if (!data) $this.data('markdown', (data = new Markdown(this, options)))
  })
};

$.fn.markdown.messages = {};

$.fn.markdown.defaults = {
  /* Editor Properties */
  autofocus: false,
  hideable: false,
  savable: false,
  width: 'inherit',
  height: 'inherit',
  resize: 'none',
  iconlibrary: 'glyph',
  language: 'en',
  initialstate: 'editor',
  parser: null,

  /* Buttons Properties */
  buttons: [
    [{
      name: 'groupFont',
      data: [{
        name: 'cmdBold',
        hotkey: 'Ctrl+B',
        title: 'Bold',
        icon: { glyph: 'fa fa-bold', fa: 'fa fa-bold', 'fa-3': 'icon-bold' },
        callback: function(e){
          // Give/remove ** surround the selection
          var chunk, cursor, selected = e.getSelection(), content = e.getContent();

          if (selected.length === 0) {
            // Give extra word
            chunk = e.__localize('strong text');
          } else {
            chunk = selected.text;
          }

          // transform selection and set the cursor into chunked text
          if (content.substr(selected.start-2,2) === '**'
              && content.substr(selected.end,2) === '**' ) {
            e.setSelection(selected.start-2,selected.end+2);
            e.replaceSelection(chunk);
            cursor = selected.start-2;
          } else {
            e.replaceSelection('**'+chunk+'**');
            cursor = selected.start+2;
          }

          // Set the cursor
          e.setSelection(cursor,cursor+chunk.length);
        }
      },{
        name: 'cmdItalic',
        title: 'Italic',
        hotkey: 'Ctrl+I',
        icon: { glyph: 'fa fa-italic', fa: 'fa fa-italic', 'fa-3': 'icon-italic' },
        callback: function(e){
          // Give/remove * surround the selection
          var chunk, cursor, selected = e.getSelection(), content = e.getContent();

          if (selected.length === 0) {
            // Give extra word
            chunk = e.__localize('emphasized text');
          } else {
            chunk = selected.text;
          }

          // transform selection and set the cursor into chunked text
          if (content.substr(selected.start-1,1) === '_'
              && content.substr(selected.end,1) === '_' ) {
            e.setSelection(selected.start-1,selected.end+1);
            e.replaceSelection(chunk);
            cursor = selected.start-1;
          } else {
            e.replaceSelection('_'+chunk+'_');
            cursor = selected.start+1;
          }

          // Set the cursor
          e.setSelection(cursor,cursor+chunk.length);
        }
      },{
        name: 'cmdHeading',
        title: 'Heading',
        hotkey: 'Ctrl+H',
        icon: { glyph: 'fa fa-header', fa: 'fa fa-header', 'fa-3': 'icon-font' },
        callback: function(e){
          // Append/remove ### surround the selection
          var chunk, cursor, selected = e.getSelection(), content = e.getContent(), pointer, prevChar;

          if (selected.length === 0) {
            // Give extra word
            chunk = e.__localize('heading text');
          } else {
            chunk = selected.text + '\n';
          }

          // transform selection and set the cursor into chunked text
          if ((pointer = 4, content.substr(selected.start-pointer,pointer) === '### ')
              || (pointer = 3, content.substr(selected.start-pointer,pointer) === '###')) {
            e.setSelection(selected.start-pointer,selected.end);
            e.replaceSelection(chunk);
            cursor = selected.start-pointer;
          } else if (selected.start > 0 && (prevChar = content.substr(selected.start-1,1), !!prevChar && prevChar != '\n')) {
            e.replaceSelection('\n\n### '+chunk);
            cursor = selected.start+6;
          } else {
            // Empty string before element
            e.replaceSelection('### '+chunk);
            cursor = selected.start+4;
          }

          // Set the cursor
          e.setSelection(cursor,cursor+chunk.length);
        }
      }]
    },{
      name: 'groupLink',
      data: [{
        name: 'cmdUrl',
        title: 'URL/Link',
        hotkey: 'Ctrl+L',
        icon: { glyph: 'fa fa-link', fa: 'fa fa-link', 'fa-3': 'icon-link' },
        callback: function(e){
          // Give [] surround the selection and prepend the link
          var chunk, cursor, selected = e.getSelection(), content = e.getContent(), link;

          if (selected.length === 0) {
            // Give extra word
            chunk = e.__localize('enter link description here');
          } else {
            chunk = selected.text;
          }

          link = prompt(e.__localize('Insert Hyperlink'),'http://');

          var urlRegex = new RegExp('^((http|https)://|(mailto:)|(//))[a-z0-9]', 'i');
          if (link !== null && link !== '' && link !== 'http://' && urlRegex.test(link)) {
            var sanitizedLink = $('<div>'+link+'</div>').text();

            // transform selection and set the cursor into chunked text
            e.replaceSelection('['+chunk+']('+sanitizedLink+')');
            cursor = selected.start+1;

            // Set the cursor
            e.setSelection(cursor,cursor+chunk.length);
          }
        }
      },{
        name: 'cmdImage',
        title: 'Image',
        hotkey: 'Ctrl+G',
        icon: { glyph: 'fa fa-picture-o', fa: 'fa fa-picture-o', 'fa-3': 'icon-picture' },
        callback: function(e){
          // Give ![] surround the selection and prepend the image link
          var chunk, cursor, selected = e.getSelection(), content = e.getContent(), link;

          if (selected.length === 0) {
            // Give extra word
            chunk = e.__localize('enter image description here');
          } else {
            chunk = selected.text;
          }

          link = prompt(e.__localize('Insert Image Hyperlink'),'http://');

          var urlRegex = new RegExp('^((http|https)://|(//))[a-z0-9]', 'i');
          if (link !== null && link !== '' && link !== 'http://' && urlRegex.test(link)) {
            var sanitizedLink = $('<div>'+link+'</div>').text();

            // transform selection and set the cursor into chunked text
            e.replaceSelection('!['+chunk+']('+sanitizedLink+' "'+e.__localize('enter image title here')+'")');
            cursor = selected.start+2;

            // Set the next tab
            e.setNextTab(e.__localize('enter image title here'));

            // Set the cursor
            e.setSelection(cursor,cursor+chunk.length);
          }
        }
      }]
    },{
      name: 'groupMisc',
      data: [{
        name: 'cmdList',
        hotkey: 'Ctrl+U',
        title: 'Unordered List',
        icon: { glyph: 'fa fa-list', fa: 'fa fa-list', 'fa-3': 'icon-list-ul' },
        callback: function(e){
          // Prepend/Give - surround the selection
          var chunk, cursor, selected = e.getSelection(), content = e.getContent();

          // transform selection and set the cursor into chunked text
          if (selected.length === 0) {
            // Give extra word
            chunk = e.__localize('list text here');

            e.replaceSelection('- '+chunk);
            // Set the cursor
            cursor = selected.start+2;
          } else {
            if (selected.text.indexOf('\n') < 0) {
              chunk = selected.text;

              e.replaceSelection('- '+chunk);

              // Set the cursor
              cursor = selected.start+2;
            } else {
              var list = [];

              list = selected.text.split('\n');
              chunk = list[0];

              $.each(list,function(k,v) {
                list[k] = '- '+v;
              });

              e.replaceSelection('\n\n'+list.join('\n'));

              // Set the cursor
              cursor = selected.start+4;
            }
          }

          // Set the cursor
          e.setSelection(cursor,cursor+chunk.length);
        }
      },
      {
        name: 'cmdListO',
        hotkey: 'Ctrl+O',
        title: 'Ordered List',
        icon: { glyph: 'fa fa-list-ol', fa: 'fa fa-list-ol', 'fa-3': 'icon-list-ol' },
        callback: function(e) {

          // Prepend/Give - surround the selection
          var chunk, cursor, selected = e.getSelection(), content = e.getContent();

          // transform selection and set the cursor into chunked text
          if (selected.length === 0) {
            // Give extra word
            chunk = e.__localize('list text here');
            e.replaceSelection('1. '+chunk);
            // Set the cursor
            cursor = selected.start+3;
          } else {
            if (selected.text.indexOf('\n') < 0) {
              chunk = selected.text;

              e.replaceSelection('1. '+chunk);

              // Set the cursor
              cursor = selected.start+3;
            } else {
              var list = [];

              list = selected.text.split('\n');
              chunk = list[0];

              $.each(list,function(k,v) {
                list[k] = '1. '+v;
              });

              e.replaceSelection('\n\n'+list.join('\n'));

              // Set the cursor
              cursor = selected.start+5;
            }
          }

          // Set the cursor
          e.setSelection(cursor,cursor+chunk.length);
        }
      },
      {
        name: 'cmdCode',
        hotkey: 'Ctrl+K',
        title: 'Code',
        icon: { glyph: 'fa fa-code', fa: 'fa fa-code', 'fa-3': 'icon-code' },
        callback: function(e) {
          // Give/remove ** surround the selection
          var chunk, cursor, selected = e.getSelection(), content = e.getContent();

          if (selected.length === 0) {
            // Give extra word
            chunk = e.__localize('code text here');
          } else {
            chunk = selected.text;
          }

          // transform selection and set the cursor into chunked text
          if (content.substr(selected.start-4,4) === '```\n'
              && content.substr(selected.end,4) === '\n```') {
            e.setSelection(selected.start-4, selected.end+4);
            e.replaceSelection(chunk);
            cursor = selected.start-4;
          } else if (content.substr(selected.start-1,1) === '`'
              && content.substr(selected.end,1) === '`') {
            e.setSelection(selected.start-1,selected.end+1);
            e.replaceSelection(chunk);
            cursor = selected.start-1;
          } else if (content.indexOf('\n') > -1) {
            e.replaceSelection('```\n'+chunk+'\n```');
            cursor = selected.start+4;
          } else {
            e.replaceSelection('`'+chunk+'`');
            cursor = selected.start+1;
          }

          // Set the cursor
          e.setSelection(cursor,cursor+chunk.length);
        }
      },
      {
        name: 'cmdQuote',
        hotkey: 'Ctrl+Q',
        title: 'Quote',
        icon: { glyph: 'fa fa-quote-left', fa: 'fa fa-quote-left', 'fa-3': 'icon-quote-left' },
        callback: function(e) {
          // Prepend/Give - surround the selection
          var chunk, cursor, selected = e.getSelection(), content = e.getContent();

          // transform selection and set the cursor into chunked text
          if (selected.length === 0) {
            // Give extra word
            chunk = e.__localize('quote here');

            e.replaceSelection('> '+chunk);

            // Set the cursor
            cursor = selected.start+2;
          } else {
            if (selected.text.indexOf('\n') < 0) {
              chunk = selected.text;

              e.replaceSelection('> '+chunk);

              // Set the cursor
              cursor = selected.start+2;
            } else {
              var list = [];

              list = selected.text.split('\n');
              chunk = list[0];

              $.each(list,function(k,v) {
                list[k] = '> '+v;
              });

              e.replaceSelection('\n\n'+list.join('\n'));

              // Set the cursor
              cursor = selected.start+4;
            }
          }

          // Set the cursor
          e.setSelection(cursor,cursor+chunk.length);
        }
      }]
    },{
      name: 'groupUtil',
      data: [{
        name: 'cmdPreview',
        toggle: true,
        hotkey: 'Ctrl+P',
        title: 'Preview',
        btnText: 'Preview',
        btnClass: 'btn btn-primary btn-sm',
        icon: { glyph: 'fa fa-search', fa: 'fa fa-search', 'fa-3': 'icon-search' },
        callback: function(e){
          // Check the preview mode and toggle based on this flag
          var isPreview = e.$isPreview,content;

          if (isPreview === false) {
            // Give flag that tell the editor enter preview mode
            e.showPreview();
          } else {
            e.hidePreview();
          }
        }
      }]
    }]
  ],
  additionalButtons:[], // Place to hook more buttons by code
  reorderButtonGroups:[],
  hiddenButtons:[], // Default hidden buttons
  disabledButtons:[], // Default disabled buttons
  footer: '',
  fullscreen: {
    enable: true,
    icons: {
      fullscreenOn: {
        fa: 'fa fa-expand',
        glyph: 'fa fa-expand',
        'fa-3': 'icon-resize-full'
      },
      fullscreenOff: {
        fa: 'fa fa-compress',
        glyph: 'fa fa-compress',
        'fa-3': 'icon-resize-small'
      }
    }
  },

  /* Events hook */
  onShow: function (e) {},
  onPreview: function (e) {},
  onSave: function (e) {},
  onBlur: function (e) {},
  onFocus: function (e) {},
  onChange: function(e) {},
  onFullscreen: function(e) {},
  onSelect: function (e) {}
};

$.fn.markdown.Constructor = Markdown;


/* MARKDOWN NO CONFLICT
* ==================== */

$.fn.markdown.noConflict = function () {
  $.fn.markdown = old;
  return this;
};

/* MARKDOWN GLOBAL FUNCTION & DATA-API
* ==================================== */
var initMarkdown = function(el) {
  var $this = el;

  if ($this.data('markdown')) {
    $this.data('markdown').showEditor();
    return;
  }

  $this.markdown()
};

var blurNonFocused = function(e) {
  var $activeElement = $(document.activeElement);

  // Blur event
  $(document).find('.md-editor').each(function(){
    var $this            = $(this),
        focused          = $activeElement.closest('.md-editor')[0] === this,
        attachedMarkdown = $this.find('textarea').data('markdown') ||
                           $this.find('div[data-provider="markdown-preview"]').data('markdown');

    if (attachedMarkdown && !focused) {
      attachedMarkdown.blur();
    }
  })
};

$(document)
  .on('click.markdown.data-api', '[data-provide="markdown-editable"]', function (e) {
    initMarkdown($(this));
    e.preventDefault();
  })
  .on('click focusin', function (e) {
    blurNonFocused(e);
  })
  .ready(function(){
    $('textarea[data-provide="markdown"]').each(function(){
      initMarkdown($(this));
    })
  });

}));