/* ===================================================

* 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";

/* 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),
            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 btn-sm').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);
    }

    // Re-attach markdown data
    this.$textarea.data('markdown', this);
  },
  __setEventListeners: function() {
    this.$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));
    }
  },
  __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) {
    if(typeof src == 'object'){
      var customIcon = this.$options.customIcons[src.name];
      // console.log(customIcon)
      // console.log(this.$options)
      return typeof customIcon == 'undefined' ? src.icon[this.$options.iconlibrary] : customIcon;
    } else {
      return 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');
      $('body').removeClass('md-nooverflow');
      this.$options.onFullscreenExit(this);

      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 additional group matches an existing group
          var matchingGroups = $.grep(allBtnGroups, function(allButtonGroup, allIdx) {
            return allButtonGroup.name === buttonGroup.name;
          });

          // if it matches add the additional 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 block 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();
      this.__setEventListeners();

      // 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);

    // enable dropZone if available and configured
    if (options.dropZoneOptions) {
      if (this.$editor.dropzone) {
        if(!options.dropZoneOptions.init) {
          options.dropZoneOptions.init = function() {
            var caretPos = 0;
            this.on('drop', function(e) {
                caretPos = textarea.prop('selectionStart');
                });
            this.on('success', function(file, path) {
                var text = textarea.val();
                textarea.val(text.substring(0, caretPos) + '\n![description](' + path + ')\n' + text.substring(caretPos));
                });
            this.on('error', function(file, error, xhr) {
                console.log('Error:', error);
                });
          };
        }
        this.$editor.addClass('dropzone');
        this.$editor.dropzone(options.dropZoneOptions);
      } else {
        console.log('dropZoneOptions was configured, but DropZone was not detected.');
      }
    }

    // enable data-uris via drag and drop
    if (options.enableDropDataUri === true) {
      this.$editor.on('drop', function(e) {
        var caretPos = textarea.prop('selectionStart');
        e.stopPropagation();
        e.preventDefault();
        $.each(e.originalEvent.dataTransfer.files, function(index, file){
          var fileReader = new FileReader();
            fileReader.onload = (function(file) {
               var type = file.type.split('/')[0];
               return function(e) {
                  var text = textarea.val();
                  if (type === 'image')
                    textarea.val(text.substring(0, caretPos) + '\n<img src="'+ e.target.result  +'" />\n' + text.substring(caretPos) );
                  else
                    textarea.val(text.substring(0, caretPos) + '\n<a href="'+ e.target.result  +'">Download ' + file.name + '</a>\n' + text.substring(caretPos) );
               };
            })(file);
          fileReader.readAsDataURL(file);
        });
      });
    }

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

    return this;
  },
  parseContent: function(val) {
    var content;

    // parse with supported markdown parser
    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 misused scenario
      // @see https://github.com/toopay/bootstrap-markdown/issues/170
      return this;
    }

    // Give flag that tells the editor to 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, replacementContainer);
    // Set the content based on 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',
      "min-height": container.outerHeight() + 'px',
      "height": "auto"
    });

    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 tells the editor to 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);

    // Perform any callbacks
    this.$options.onPreviewEnd(this);

    // 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's 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 has reached 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;
        var chars = this.getContent().split('');
        var enterIndex = this.getSelection().start;
        var priorNewlineIndex = -1; // initial line break at before index 0

        // traverse backwards through chars to check if last line break was num/bullet item
        for (var i = enterIndex - 2; i >= 0; i--) {
          if (chars[i] === '\n') {
            priorNewlineIndex = i;
            break;
          }
        }

        var charFollowingLastLineBreak = chars[priorNewlineIndex + 1];
        if (charFollowingLastLineBreak === '-') {
          this.addBullet(enterIndex);
        } else if ($.isNumeric(charFollowingLastLineBreak)) {
            var numBullet = this.getBulletNumber(priorNewlineIndex + 1);
            if (numBullet) {
              this.addNumberedBullet(enterIndex, numBullet);
            }
        }
        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);
  },
  insertContent: function(index, content) {
    var firstHalf = this.getContent().slice(0, index);
    var secondHalf = this.getContent().slice(index + 1);
    this.setContent(firstHalf.concat(content).concat(secondHalf));
  },
  addBullet: function(index) {
    this.insertContent(index, '- \n');
    this.setSelection(index + 2, index + 2); // Put the cursor after the bullet
  },
  addNumberedBullet: function(index, num) {
    var numBullet = (num + 1) + '. \n';
    this.insertContent(index, numBullet);

    var prefixLength = num.toString().length + 2;
    this.setSelection(index + prefixLength, index + prefixLength); // Put the cursor after the number
  },
  getBulletNumber: function(startIndex) {
    var bulletNum = this.getContent().slice(startIndex).split('.')[0];
    return $.isNumeric(bulletNum) ? parseInt(bulletNum) : null;
  },
  change: function(e) {
    this.$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,
  dropZoneOptions: null,
  enableDropDataUri: false,

  /* Buttons Properties */
  buttons: [
    [{
      name: 'groupFont',
      data: [{
        name: 'cmdBold',
        hotkey: 'Ctrl+B',
        title: 'Bold',
        icon: {
          glyph: 'glyphicon glyphicon-bold',
          fa: 'fa fa-bold',
          'fa-3': 'icon-bold',
          'fa-5': 'fas fa-bold',
          octicons: 'octicon octicon-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: 'glyphicon glyphicon-italic',
          fa: 'fa fa-italic',
          'fa-3': 'icon-italic',
          'fa-5': 'fas fa-italic',
          octicons: 'octicon octicon-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: 'glyphicon glyphicon-header',
          fa: 'fa fa-header',
          'fa-3': 'icon-font',
          'fa-5': 'fas fa-heading',
          octicons: 'octicon octicon-text-size'
        },
        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: 'glyphicon glyphicon-link',
          fa: 'fa fa-link',
          'fa-3': 'icon-link',
          'fa-5': 'fas fa-link',
          octicons: 'octicon octicon-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: 'glyphicon glyphicon-picture',
          fa: 'fa fa-picture-o',
          'fa-3': 'icon-picture',
          'fa-5': 'far fa-image',
          octicons: 'octicon octicon-file-media'
        },
        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: 'glyphicon glyphicon-list',
          fa: 'fa fa-list',
          'fa-3': 'icon-list-ul',
          'fa-5': 'fas fa-list-ul',
          octicons: 'octicon octicon-list-unordered'
        },
        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: 'glyphicon glyphicon-th-list',
          fa: 'fa fa-list-ol',
          'fa-3': 'icon-list-ol',
          'fa-5': 'fas fa-list-ol',
          octicons: 'octicon octicon-list-ordered'
        },
        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 i = 1;
              var list = [];

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

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

              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: 'glyphicon glyphicon-console',
          fa: 'fa fa-code',
          'fa-3': 'icon-code',
          'fa-5': 'fas fa-code',
          octicons: 'octicon octicon-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: 'glyphicon glyphicon-comment',
          fa: 'fa fa-quote-left',
          'fa-3': 'icon-quote-left',
          'fa-5': 'fas fa-quote-left',
          octicons: 'octicon octicon-quote'
        },
        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: 'glyphicon glyphicon-search',
          fa: 'fa fa-search',
          'fa-3': 'icon-search',
          'fa-5': 'fas fa-search',
          octicons: 'octicon octicon-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 tells the editor to enter preview mode
            e.showPreview();
          } else {
            e.hidePreview();
          }
        }
      }]
    }]
  ],
  customIcons: {},
  additionalButtons: [], // Place to hook more buttons by code
  reorderButtonGroups: [],
  hiddenButtons: [], // Default hidden buttons
  disabledButtons: [], // Default disabled buttons
  footer: '',
  fullscreen: {
    enable: true,
    icons: {
      fullscreenOn: {
        name: "fullscreenOn",
        icon: {
          fa: 'fa fa-expand',
          glyph: 'glyphicon glyphicon-fullscreen',
          'fa-3': 'icon-resize-full',
          'fa-5': 'fas fa-expand-arrows-alt',
          octicons: 'octicon octicon-link-external'
        }
      },
      fullscreenOff: {
        name: "fullscreenOff",
        icon: {
          fa: 'fa fa-compress',
          glyph: 'glyphicon glyphicon-fullscreen',
          'fa-3': 'icon-resize-small',
          'fa-5': 'fas fa-compress',
          octicons: 'octicon octicon-browser'
        }
      }
    }
  },

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

}));