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(function($) {

  /* globals ajaxurl, jQuery, wp */

  "use strict";

  /**
   * jQuery UI Sortable
   */

  /**
   * Sortable | Desktop
   * Builder desktop, you can put sections here
   */

  function sortableDesk(el) {
    el.sortable({
      items: '.mfn-row',

      forcePlaceholderSize: true,
      placeholder: 'mfn-placeholder',

      opacity: 0.9,
      cursor: 'move',
      distance: 5
    });
  }

  /**
   * Sortable | Section
   * Single section, you can put wraps or dividers here
   */

  function sortableSection(el) {
    el.sortable({
      connectWith: '.mfn-sortable-row',

      items: '.mfn-wrap',

      forcePlaceholderSize: true,
      placeholder: 'mfn-placeholder',

      opacity: 0.9,
      cursor: 'move',
      cursorAt: {
        top: 20,
        left: 20
      },
      distance: 5,

      receive: sortableSectionReceive
    });
  }

  /**
   * Sortable | Section receive
   * Event is triggered when an item from a connected sortable list has been dropped into another list.
   * Change wrap parent ID
   */

  function sortableSectionReceive(event, ui) {

    var targetSectionID = ui.item.closest('.mfn-sortable-row').siblings('.mfn-row-id').val();

    ui.item.find('.mfn-wrap-parent').val(targetSectionID);
  }

  /**
   * Sortable | Wrap
   * Single wrap, you can put items here
   */

  function sortableWrap(el) {
    el.sortable({
      connectWith: '.mfn-sortable-wrap',

      items: '.mfn-item',
      cancel: '.mfn-popup',

      forcePlaceholderSize: true,
      placeholder: 'mfn-placeholder',

      forceHelperSize: false,
      helper: function(event, ui) {

        var title = ui.attr('data-title');
        var helper = $('<div class="mfn-helper">' + title + '</div>').prependTo('body');
        return helper;

      },

      opacity: 0.9,
      cursor: 'move',
      cursorAt: {
        top: 20,
        left: 20
      },
      distance: 5,

      over: function(event, ui) {

        var size = ui.item.attr('data-size');
        var parentW = ui.placeholder.parent().width();

        // FIX | item margin 0.5%
        var margins = Math.round(1 / size);
        margins = margins * 0.01;
        parentW = parentW - parentW * margins;

        var placeholderW = parentW * size;
        placeholderW = Math.round(placeholderW) - 2;

        ui.placeholder.width(placeholderW);

      },

      receive: sortableWrapReceive
    });
  }

  /**
   * Sortable | Wrap receive
   * Event is triggered when an item from a connected sortable list has been dropped into another list.
   * Change item parent ID
   */

  function sortableWrapReceive(event, ui) {

    var targetWrapID = ui.item.closest('.mfn-sortable-wrap').siblings('.mfn-wrap-id').val();

    ui.item.find('.mfn-item-parent').val(targetWrapID);
  }

  /**
   * Muffin Builder 3.0
   */

  function mfnBuilder() {

    /**
     * Attributes
     */

    var uids = [];
    var targetWrap = false;
    var builder = $('#mfn-builder');
    var desktop = $('#mfn-desk');

    if (!desktop.length) {
      return false; // Exit if Builder HTML does not exist
    }

    /**
     * Size | Items
     */

    var items = {
      'wrap': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],

      'accordion': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'article_box': ['1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'before_after': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'blockquote': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'blog': ['1/1'],
      'blog_news': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'blog_slider': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'blog_teaser': ['1/1'],
      'button': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'call_to_action': ['1/1'],
      'chart': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'clients': ['1/1'],
      'clients_slider': ['1/1'],
      'code': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'column': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'contact_box': ['1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'content': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'countdown': ['1/1'],
      'counter': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'divider': ['1/1'],
      'fancy_divider': ['1/1'],
      'fancy_heading': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'feature_box': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'feature_list': ['1/1'],
      'faq': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'flat_box': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'helper': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'hover_box': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'hover_color': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'how_it_works': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'icon_box': ['1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'image': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'image_gallery': ['1/1'],
      'info_box': ['1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'list': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'map_basic': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'map': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'offer': ['1/1'],
      'offer_thumb': ['1/1'],
      'opening_hours': ['1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'our_team': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'our_team_list': ['1/1'],
      'photo_box': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'placeholder': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'portfolio': ['1/1'],
      'portfolio_grid': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'portfolio_photo': ['1/1'],
      'portfolio_slider': ['1/1'],
      'pricing_item': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'progress_bars': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'promo_box': ['1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'quick_fact': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'shop_slider': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'sidebar_widget': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'slider': ['1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'slider_plugin': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'sliding_box': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'story_box': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'tabs': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'testimonials': ['1/1'],
      'testimonials_list': ['1/1'],
      'trailer_box': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'timeline': ['1/1'],
      'video': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'visual': ['1/6', '1/5', '1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1'],
      'zoom_box': ['1/4', '1/3', '2/5', '1/2', '3/5', '2/3', '3/4', '4/5', '5/6', '1/1']
    };

    /**
     * Size | Converter
     * Convert fraction to decimal fraction
     */

    var sizes = {
      '1/6': 0.1666,
      '1/5': 0.2,
      '1/4': 0.25,
      '1/3': 0.3333,
      '2/5': 0.4,
      '1/2': 0.5,
      '3/5': 0.6,
      '2/3': 0.6667,
      '3/4': 0.75,
      '4/5': 0.8,
      '5/6': 0.8333,
      '1/1': 1
    };

    /**
     * Shortcodes
     */

    var shortcodes = {
      'alert': '[alert style="warning"]Insert your content here[/alert]',
      'blockquote': '[blockquote author="" link="" target="_blank"]Insert your content here[/blockquote]',
      'button': '[button title="Button" link="" target="_blank" align="" icon="" icon_position="" color="" font_color="" size="2" full_width="" class="" download="" rel="" onclick=""]',
      'code': '[code]Insert your content here[/code]',
      'content_link': '[content_link title="" icon="icon-lamp" link="" target="_blank" class="" download=""]',
      'dropcap': '[dropcap font="" size="1" background="" color="" circle="0" transparent="0"]I[/dropcap]nsert your content here',
      'fancy_link': '[fancy_link title="" link="" target="" style="1" class="" download=""]',
      'google_font': '[google_font font="Open Sans" size="25" weight="400" italic="0" letter_spacing="" color="#626262" subset=""]Insert your content here[/google_font]',
      'heading': '[heading tag="h2" align="center" color="#000" style="lines" color2="#000"]Insert your content here[/heading]',
      'highlight': '[highlight background="" color=""]Insert your content here[/highlight]',
      'hr': '[hr height="30" style="default" line="default" themecolor="1"]',
      'icon': '[icon type="icon-lamp"]',
      'icon_bar': '[icon_bar icon="icon-lamp" link="" target="_blank" size="" social=""]',
      'icon_block': '[icon_block icon="icon-lamp" align="" color="" size="25"]',
      'idea': '[idea]Insert your content here[/idea]',
      'image': '[image src="" width="" height="" align="" stretch="0" border="0" margin_top="" margin_bottom="" link_image="" link="" target="" hover="" alt="" caption="" greyscale="" animate=""]',
      'popup': '[popup title="Title" padding="0" button="0"]Insert your popup content here[/popup]',
      'progress_icons': '[progress_icons icon="icon-heart-line" image="" count="5" active="3" background=""]',
      'share_box': '[share_box]',
      'table': '<table><thead><tr><th>Column 1 heading</th><th>Column 2 heading</th><th>Column 3 heading</th></tr></thead><tbody><tr><td>Row 1 col 1 content</td><td>Row 1 col 2 content</td><td>Row 1 col 3 content</td></tr><tr><td>Row 2 col 1 content</td><td>Row 2 col 2 content</td><td>Row 2 col 3 content</td></tr></tbody></table>',
      'tooltip': '[tooltip hint="Insert your hint here"]Insert your content here[/tooltip]',
      'tooltip_image': '[tooltip_image hint="Insert your hint here" image=""]Insert your content here[/tooltip_image]',
    };

    /**
     * Sortable | Initialize
     */

    sortableDesk(desktop);
    sortableSection(desktop.find('.mfn-sortable-row'));
    sortableWrap(desktop.find('.mfn-sortable-wrap'));

    /**
     * Sections
     */

    /**
     * Section | Add
     * Add new section, enable sortable, set attributes and section ID
     */

    builder.on('click', '.mfn-row-add-btn', function() {

      var clone = $('#mfn-rows .mfn-row').clone(true);

      // block window unload if any changes were made

      enableBeforeUnload();

      // enable sortable

      sortableSection(clone.find('.mfn-sortable-row'));

      // hide clone and set attributes

      clone.hide().find('.mfn-element-content input').each(function() {
        $(this).attr('name', $(this).attr('class') + '[]');
      });

      // data-name -> name

      clone.find('.mfn-element-meta').find('input, select, textarea').each(function() {
        $(this).attr('name', $(this).attr('data-name'));
      });

      // section ID

      clone.find('.mfn-row-id').val(uniqueID());

      // insert add as first or last

      if ($(this).hasClass('add-first')) {
        desktop.prepend(clone).find('.mfn-row').fadeIn(300);
      } else {
        desktop.append(clone).find('.mfn-row').fadeIn(300);
      }

      // show add last section button

      if ($('.mfn-row', desktop).length) {
        $('.mfn-row-add.last').fadeIn(300, function() {
          $(this).removeClass('hide');
        });
      }

    });

    /**
     * Section | Clone
     * Clone target section, reinit sortable, set ID, wrap ID and wrap parent ID
     */

    builder.on('click', '.mfn-row-clone', function() {

      var element = $(this).closest('.mfn-row'),
        clone = false;

      // block window unload if any changes were made

      enableBeforeUnload();

      // destroy sortable, clone element

      element.find('.mfn-sortable').sortable('destroy');
      clone = element.clone(true);

      // reinitialize sortable

      sortableSection(element.find('.mfn-sortable-row'));
      sortableSection(clone.find('.mfn-sortable-row'));
      sortableWrap(element.find('.mfn-sortable-wrap'));
      sortableWrap(clone.find('.mfn-sortable-wrap'));

      // set section ID and wrap parent ID

      clone.find('.mfn-row-id, .mfn-wrap-parent').val(uniqueID());

      // set wrap ID and items parent ID

      clone.find('.mfn-wrap').each(function() {
        $(this).find('.mfn-wrap-id, .mfn-item-parent').val(uniqueID());
      });

      // set items ID

      clone.find('.mfn-item').each(function() {
        $(this).find('.mfn-item-id').val(uniqueID());
      });

      // insert after current section

      element.after(clone);
    });

    /**
     * Section | Visibility
     * Show / Hide section
     */

    builder.on('click', '.mfn-element-hide', function() {

      var item = $(this).closest('.mfn-element');

      if (item.hasClass('hide')) {

        // Show

        $(this).removeClass('dashicons-hidden').addClass('dashicons-visibility');
        item.removeClass('hide').css('opacity', 1);

        item.find('tr.hidden input[name="mfn-rows[hide][]"]').val(0);

      } else {

        // Hide

        $(this).removeClass('dashicons-visibility').addClass('dashicons-hidden');
        item.addClass('hide');

        item.find('tr.hidden input[name="mfn-rows[hide][]"]').val(1);

      }

    });

    /**
     * Wraps
     */

    /**
     * Wrap | Add
     * Add new wrap, enable sortable, set attributes and wrap ID
     */

    builder.on('click', '.mfn-add-wrap', function() {

      var parentDesktop = $(this).closest('.mfn-row').find('.mfn-sortable-row').first();
      var targetParentID = $(this).closest('.mfn-row').find('.mfn-row-id').val();

      var clone = $('#mfn-wraps .mfn-wrap').clone(true);

      // block window unload if any changes were made

      enableBeforeUnload();

      // enable sortable

      sortableWrap(clone.find('.mfn-sortable-wrap'));

      // hide clone and set attributes

      clone.hide().find('.mfn-element-content > input').each(function() {
        $(this).attr('name', $(this).attr('class') + '[]');
      });

      // data-name -> name

      clone.find('.mfn-element-meta').find('input, select, textarea').each(function() {
        $(this).attr('name', $(this).attr('data-name'));
      });

      // set wrap ID and parent section ID

      clone.find('.mfn-wrap-id').val(uniqueID());
      clone.find('.mfn-wrap-parent').val(targetParentID);

      // insert at the end of target section

      parentDesktop.append(clone).find('.mfn-wrap').fadeIn(300);

    });

    /**
     * Wrap | Clone
     * Clone target wrap, reinit sortable, set ID, items ID and parent ID
     */

    builder.on('click', '.mfn-wrap-clone', function() {

      var element = $(this).closest('.mfn-wrap');

      // block window unload if any changes were made

      enableBeforeUnload();

      // destroy sortable, clone element

      element.find('.mfn-sortable').sortable('destroy');
      var clone = element.clone(true);

      // reinitialize sortable

      sortableWrap(element.find('.mfn-sortable-wrap'));
      sortableWrap(clone.find('.mfn-sortable-wrap'));

      // set wrap ID and items parent ID

      clone.find('.mfn-wrap-id, .mfn-item-parent').val(uniqueID());

      // set item ID

      clone.find('.mfn-item').each(function() {
        $(this).find('.mfn-item-id').val(uniqueID());
      });

      // insert after current wrap

      element.after(clone);
    });

    /**
     * Wrap | Divider
     * Add new divider, set attributes and wrap ID
     */

    builder.on('click', '.mfn-add-divider', function() {

      var parentDesktop = $(this).closest('.mfn-row').find('.mfn-sortable-row').first();
      var targetParentID = $(this).closest('.mfn-row').find('.mfn-row-id').val();

      var clone = $('#mfn-wraps .mfn-wrap').clone(true);

      // block window unload if any changes were made

      enableBeforeUnload();

      // hide clone and set attributes

      clone.hide().find('.mfn-element-content > input').each(function() {
        $(this).attr('name', $(this).attr('class') + '[]');
      });

      // data-name -> name

      clone.find('.mfn-element-meta').find('input, select, textarea').each(function() {
        $(this).attr('name', $(this).attr('data-name'));
      });

      // set cloned wrap as divider

      clone.addClass('divider')
        .find('.mfn-wrap-size').val('divider');

      // set wrap ID and parent section ID

      clone.find('.mfn-wrap-id').val(uniqueID());
      clone.find('.mfn-wrap-parent').val(targetParentID);

      // insert at the end of target section

      parentDesktop.append(clone).find('.mfn-wrap').fadeIn(300);
    });

    /**
     * Add item
     */

    /**
     * Add item | Open
     * Show add item popup
     */

    builder.on('click', '.mfn-add-item', function() {

      // disable background content scrolling & dragging

      $('body').addClass('mfn-popup-open');
      $('#mfn-content').find('.ui-sortable').sortable('disable');

      // show popup and set target wrap

      $('#mfn-item-add').fadeIn(300);
      targetWrap = $(this).closest('.mfn-wrap');

      // activate first tab

      $('#mfn-item-add').find('.mfn-popup-tabs li:first').trigger('click');
    });

    /**
     * Add item | Close
     * Close add item popup
     */

    builder.on('click', '#mfn-item-add .mfn-ph-close', function() {

      // enable background content scrolling & dragging

      $('body').removeClass('mfn-popup-open');
      $('#mfn-content').find('.ui-sortable').sortable('enable');

      // hide popup and reset target wrap

      $('#mfn-item-add').fadeOut(300);
      targetWrap = false;

    });

    /**
     * Add item | Tabs
     * Filter items by categories
     */

    builder.on('click', '#mfn-item-add .mfn-popup-tabs li', function() {

      var filter = $(this).attr('data-filter');
      var items = $(this).closest('.mfn-popup-content').find('.mfn-popup-items');

      // clear search field

      $('#mfn-item-add .mfn-search-item').val('');

      // add active on tab click and filter

      $(this).addClass('active')
        .siblings().removeClass('active');

      if (filter == '*') {
        items.find('li').show();
      } else {
        items.find('li.category-' + filter).show();
        items.find('li').not('.category-' + filter).hide();
      }

    });

    /**
     * Add item | Search
     * Filter items by search filed value
     */

    $('#mfn-item-add .mfn-search-item').on('keyup', function() {

      var filter = $(this).val().toLowerCase();
      var items = $(this).closest('.mfn-popup-content').find('.mfn-popup-items');

      if (filter.length) {

        items.find('li[data-type*=' + filter + ']').show();
        items.find('li').not('[data-type*=' + filter + ']').hide();

        // remove active from category tabs

        $('#mfn-item-add .mfn-popup-tabs li').removeClass('active');

      } else {

        items.find('li').show();

        // activate first tab

        $('#mfn-item-add .mfn-popup-tabs li:first').addClass('active');

      }

    });

    /**
     * Items
     */

    /**
     * Item | Add
     * Add new item, set attributes and item ID
     */

    builder.on('click', '#mfn-item-add .mfn-popup-items li a', function() {

      var parentDesktop = targetWrap.find('.mfn-sortable-wrap').first();
      var targetParentID = targetWrap.find('.mfn-wrap-id').val();
      var wrapSize = targetWrap.closest('.mfn-wrap').attr('data-size');

      var item = $(this).attr('data-type');
      var clone = $('#mfn-items').find('div.mfn-item-' + item).clone(true);

      // block window unload if any changes were made

      enableBeforeUnload();

      // hide add item popup

      $('#mfn-item-add').fadeOut(300);

      // enable background content scrolling & dragging

      $('body').removeClass('mfn-popup-open');
      $('#mfn-content').find('.ui-sortable').sortable('enable');

      // hide clone and set attributes

      clone.hide().find('.mfn-element-content input').each(function() {
        $(this).attr('name', $(this).attr('class') + '[]');
      }); // change it to use data-name

      // data-name -> name

      clone.find('.mfn-element-meta').find('input, select, textarea').each(function() {
        $(this).attr('name', $(this).attr('data-name'));
      });

      // set item ID and parent wrap ID

      clone.find('input.mfn-item-id').val(uniqueID());
      clone.find('.mfn-item-parent').val(targetParentID);

      // small wrap fix | if wrap is smaller than 1/2 add 1/1 item

      if (wrapSize < 0.5) {
        clone.attr('data-size', 1);
        clone.find('input.mfn-item-size').val('1/1');
        clone.find('.mfn-item-size span').text('1/1');
      }

      // insert at the end of target wrap

      parentDesktop.append(clone).find(".mfn-item").fadeIn(300);
    });

    /**
     * Item | Clone
     * Clone target item, set new item ID
     */

    builder.on('click', '.mfn-item .mfn-item-clone', function() {

      var element = $(this).closest('.mfn-element');
      var clone = element.clone(true);

      // block window unload if any changes were made

      enableBeforeUnload();

      // set new ID

      clone.find('.mfn-item-id').val(uniqueID());

      // insert after current item

      element.after(clone);
    });

    /**
     * Elements
     * Below functions are the same for items, elements and sections
     */

    /**
     * Element | Resize ++
     * Increase width of target element
     */

    builder.on('click', '.mfn-item-size-inc', function() {

      var el = $(this).closest('.mfn-element'),
        type = 'wrap',
        elSizes = false;

      // block window unload if any changes were made

      enableBeforeUnload();

      // is it and item or a wrap

      if (!el.hasClass('mfn-wrap')) {
        type = el.find('.mfn-item-type').first().val();
      }

      // check available sizes for current item

      elSizes = items[type];

      for (var i = 0; i < elSizes.length - 1; i++) {
        if (el.attr('data-size') == sizes[elSizes[i]]) {

          el.attr('data-size', sizes[elSizes[i + 1]])
            .find('.mfn-item-size, .mfn-wrap-size').first().val(elSizes[i + 1]);

          el.find('.mfn-item-desc').first().text(elSizes[i + 1]);

          break;
        }
      }
    });

    /**
     * Element | Resize --
     * Decrease width of target element
     */

    builder.on('click', '.mfn-item-size-dec', function() {

      var el = $(this).closest('.mfn-element'),
        type = 'wrap',
        elSizes = false;

      // block window unload if any changes were made

      enableBeforeUnload();

      // is it and item or a wrap

      if (!el.hasClass('mfn-wrap')) {
        type = el.find('.mfn-item-type').first().val();
      }

      // check available sizes for current item

      elSizes = items[type];

      for (var i = 1; i < elSizes.length; i++) {
        if (el.attr('data-size') == sizes[elSizes[i]]) {

          el.attr('data-size', sizes[elSizes[i - 1]])
            .find('.mfn-item-size, .mfn-wrap-size').first().val(elSizes[i - 1]);

          el.find('.mfn-item-desc').first().text(elSizes[i - 1]);

          break;
        }
      }
    });

    /**
     * Element | Delete
     * Remove target element
     */

    builder.on('click', '.mfn-element-delete', function() {

      var item = $(this).closest('.mfn-element');

      // block window unload if any changes were made

      enableBeforeUnload();

      // confirm & delete

      if (confirm("You are about to delete this element.\nIt can not be restored at a later time! Continue?")) {
        item.fadeOut(300, function() {
          $(this).remove();
        });
      } else {
        return false;
      }

      // hide add last section button

      if ($('.mfn-row', desktop).length == 1) {
        $('.mfn-row-add.last').fadeOut(300);
      }

    });

    /**
     * Element | Edit
     * Open edit popup for: section, wrap or item
     */

    builder.on('click', '.mfn-element-edit', function() {

      var el = $(this).closest('.mfn-element');
      var title = el.attr('data-title');
      var type = el.children().children('.mfn-item-type').val();

      var meta = el.children('.mfn-element-meta');
      var popup = null;

      // block window unload if any changes were made

      enableBeforeUnload();

      // disable background content scrolling & dragging

      $('body').addClass('mfn-popup-open');
      $('#mfn-content').find('.ui-sortable').sortable('disable');
      $(this).closest('.mfn-row').addClass('editing');

      // build popup html

      meta
        .wrap('<div class="mfn-popup mfn-popup-item-edit"><div class="mfn-popup-inside"><div class="mfn-popup-content"></div></div></div>')
        .show();

      popup = meta.closest('.mfn-popup');

      popup.find('.mfn-popup-inside').prepend('<div class="mfn-popup-header"><div class="mfn-ph-left"><span class="mfn-ph-btn mfn-ph-desc">' + title + '</span></div><div class="mfn-ph-right"><a class="mfn-ph-btn mfn-ph-close dashicons dashicons-no" href="#"></a></div></div>');
      popup.find('.mfn-popup-content').append('<a class="mfn-popup-close mfn-ph-close" href="#">Save changes</a>');

      // trigger custom event mfn:builder:edit
      // field_visual.js

      $(document).trigger('mfn:builder:edit', [popup, type]);

      // colorpicker
      // move it to field color file and bind to mfn:builder:edit

      $('.mfn-field-color', popup).each(function() {

        var cp = $(this);
        var cpInput = $('.wp-picker-container input.has-colorpicker', cp);

        if( cpInput.length ){

          var clone = cpInput.clone();
          clone.show().removeClass('wp-color-picker').prependTo(cp);
          $('.wp-picker-container', cp).remove();

        }

        $('input.has-colorpicker', cp).wpColorPicker({
          mode: 'hsl',
          width: 275,
        });

      });

      // show popup

      popup.fadeIn(300);

    });

    /**
     * Element | Close
     * Close edit popup for: section, wrap or item
     */

    builder.on('click', '.mfn-popup-item-edit .mfn-ph-close', function(e) {

      var popup = $(this).closest('.mfn-popup');
      var type = popup.closest('.mfn-element').children().children('.mfn-item-type').val();
      var meta = null;

      // default link action should not be taken

      e.preventDefault();

      // trigger custom event mfn:builder:close
      // field_visual.js

      $(document).trigger('mfn:builder:close', [popup, type]);

      // UI sortable | destroy

      $('.gallery-container.ui-sortable').sortable('destroy');
      $('.tabs-ul.ui-sortable').sortable('destroy');

      // enable background content scrolling & dragging

      $('body').removeClass('mfn-popup-open');
      $('#mfn-content').find('.ui-sortable').sortable('enable');
      $(this).closest('.mfn-row').removeClass('editing');

      // hide popup

      popup.fadeOut(300);

      // item edit: update item title and excerpt

      if ($(popup.hasClass('mfn-popup-item-edit'))) {

        // update title

        var label = popup.find('input.mfn-item-title').first().val();
        popup.closest('.mfn-element').find('.mfn-item-label').first().html(label);

        // update excerpt

        var excerpt = popup.find('textarea.mfn-item-excerpt').first().val();
        if (excerpt) {

          // strip_tags

          var tmp = document.createElement('DIV');
          tmp.innerHTML = excerpt;
          excerpt = tmp.textContent || tmp.innerText || "";

          // strip_shortcodes

          excerpt = excerpt.replace(/\[.*?\]/g, ''); // do not put space before regex

          // 16 words

          excerpt = excerpt.split(" ").splice(0, 16).join(" ");

          popup.closest('.mfn-element').find('.mfn-item-excerpt').first().html(excerpt);
        }

        // remove popup html

        setTimeout(function() {

          meta = popup.find('.mfn-element-meta');

          popup.find('.mfn-popup-header').remove();
          popup.find('.mfn-popup-close').remove();

          meta.unwrap().unwrap().unwrap();

          meta.hide();

        }, 300);

      }

    });

    /**
     * Element | Close | Click outside
     * Close element edit popup when click outside popup
     */

    builder.on('click', '.mfn-popup', function(e) {

      var target = $(e.target);

      if (target.hasClass('mfn-popup')) {
        $(this).find('.mfn-ph-close').trigger('click');
      }
    });

    /**
     * Element | Close | ESC
     * Close element edit popup when ESC keydown
     */

    $('body').keydown(function(event) {

      var el = $('#mfn-content .mfn-popup');

      if (el.length) {
        if (event.keyCode == 27) {
          el.find('.mfn-ph-close').trigger('click');
        }
      }

    });

    /**
     * Import, export, templates
     */

    /**
     * Show / hide
     * Show or hide import options
     */

    builder.on('click', '#mfn-migrate .btn-imp', function() {

      $('.migrate-wrapper ').hide();
      $('.import-wrapper').show();

    });

    builder.on('click', '#mfn-migrate .btn-tem', function() {

      $('.migrate-wrapper ').hide();
      $('.templates-wrapper').show();

    });

    /**
     * Export
     */

    builder.on('click', '#mfn-migrate .btn-exp', function() {

      $('.migrate-wrapper').hide();
      $('.export-wrapper').show();
      $('#mfn-items-export').val('').attr('placeholder','Muffin Builder data processing...');

      var form = $('#mfn-builder').closest('form').serialize();
      form += '&action=mfn_builder_export';

      $.ajax( ajaxurl, {

        type : "POST",
        data : form

      }).done(function(response){

        $('#mfn-items-export').val(response);

      });

    });

    /**
     * Export | select all
     */

    builder.on('click', '#mfn-items-export', function() {

      $(this).select();

    });

    /**
     * Import
     */

    builder.on('click', '#mfn-migrate .btn-import', function() {

      var el = $('#mfn-items-import');
      var type = $('#mfn-items-import-type').val();
      var form = $('#mfn-builder').closest('form');

      // set input name

      el.attr('name', el.attr('id'));

      // set ajax action

      form = form.serialize(); // serialize AFTER input name set
      form += '&action=mfn_builder_import';

      $.ajax(ajaxurl, {

        type : "POST",
        data : form

      }).done(function(response){

        if( 'after' == type ){
          desktop.append(response);
        } else if ( 'replace' == type ) {
          desktop.empty().append(response);
        } else {
          desktop.prepend(response);
        }

        // reinitialize sortable

        sortableSection(desktop.find('.mfn-sortable-row'));
        sortableWrap(desktop.find('.mfn-sortable-wrap'));

        getIDs();

      }).always(function(){

        el.removeAttr('name');

      });

    });

    /**
     * Templates
     */

    builder.on('click', '#mfn-migrate .btn-template', function() {

      var el = $('#mfn-items-import-template');
      var type = $('#mfn-items-import-template-type').val();
      var form = $('#mfn-builder').closest('form');

      // set input name

      el.attr('name', el.attr('id'));

      // set ajax action

      form = form.serialize(); // serialize AFTER input name set
      form += '&action=mfn_builder_template';

      $.ajax(ajaxurl, {

        type : "POST",
        data : form

      }).done(function(response){

        if( 'after' == type ){
          desktop.append(response);
        } else if ( 'replace' == type ) {
          desktop.empty().append(response);
        } else {
          desktop.prepend(response);
        }

        // reinitialize sortable

        sortableSection(desktop.find('.mfn-sortable-row'));
        sortableWrap(desktop.find('.mfn-sortable-wrap'));

        getIDs();

      }).always(function(){

        el.removeAttr('name');

      });

    });

    /**
     * Helper
     * Helper functions
     */

    /**
     * Unique ID
     * Generate unique ID and check for collisions
     */

    function uniqueID() {

      var uid = Math.random().toString(36).substr(2, 9);

      if (-1 !== uids.indexOf(uid)) {
        return uniqueID();
      }

      uids.push(uid);

      return uid;
    }

    /**
     * Get IDs
     * Get all existing IDs and set if ID is empty
     */

    function getIDs() {

      uids = [];

      $('.mfn-row-id, .mfn-wrap-id, .mfn-item-id', desktop).each(function() {
        if ($(this).val()) {
          uids.push($(this).val());
        }
      });

    }
    getIDs();

    /**
     * window.onbeforeunload
     * Warn user before leaving web page with unsaved changes
     */

    function enableBeforeUnload() {
      window.onbeforeunload = function(e) {
        return 'The changes you made will be lost if you navigate away from this page';
      };
    }

    $('form').submit(function() {
      window.onbeforeunload = null;
    });

    $('body').on('click', '.editor-post-publish-button', function() {
      window.onbeforeunload = null;
    });

    /**
     * Go to Top
     * Scroll page to the top
     */

    builder.on('click', '#mfn-go-to-top', function() {
      $('html, body, .edit-post-layout__content, .edit-post-sidebar').animate({
        scrollTop: 0
      }, 500);
    });

    /**
     * Post Format | Labels
     * Replace default post format labels with more detailed
     * @deprecated since WP5.0
     */

    $('#post-formats-select label.post-format-standard').text('Standard, Horizontal Image');
    $('#post-formats-select label.post-format-image').text('Vertical Image');

    /**
     * SEO
     * Copy builder content to WP Editor where it is useful for SEO plugins like Yoast
     */

    builder.on('click', '#mfn-migrate .btn-seo', function() {

      if (confirm("This option is useful for plugins like Yoast SEO to analyze Muffin Builder content.\nIt will collect content from Muffin Builder and copy it to new Content Block.\n\nYou can hide the Content if you turn \"Hide the Content\" option ON.")) {

        var form = $('#mfn-builder').closest('form').serialize();
        form += '&action=mfn_builder_seo';

        $.ajax( ajaxurl, {

          type : "POST",
          data : form

        }).done(function(response){

          var itemsSEO = response.replace(/\n/g, '<br>');

          if( typeof window.wpEditorL10n === "undefined" ) {

            // WordPress 4.9
            $('#content-html').trigger('click');
            $('#content').val(itemsSEO).text(itemsSEO);

          } else {

            // WordPress 5.0
            var block = wp.blocks.createBlock( 'core/paragraph', { content: itemsSEO } );
            wp.data.dispatch( 'core/editor' ).insertBlocks( block );

          }

        });

      } else {
        return false;
      }

    });

    /**
     * Column item textarea toolbar
     */

    /**
     * Wrap selected text OR insert into carret
     * Check if selected text should be wrapped or just insert tag or shortcode in cursor position
     */

    function wrapText(textArea, openTag, closeTag) {

      var len = textArea.val().length;
      var start = textArea[0].selectionStart;
      var end = textArea[0].selectionEnd;
      var selectedText = textArea.val().substring(start, end);
      var replacement = openTag + selectedText + closeTag;

      textArea.val(textArea.val().substring(0, start) + replacement + textArea.val().substring(end, len));

    }

    /**
     * Shortcode | Menu
     * Show or hide add shortcode menu in column item textarea toolbar
     */

    builder.on('click', '.mfn-sc-add-btn', function() {

      var parent = $(this).parent();

      if (parent.hasClass('focus')) {
        parent.removeClass('focus');
      } else {
        $('.mfn-sc-add').removeClass('focus');
        parent.addClass('focus');
      }

    });

    /**
     * Shortcode | Add
     * Add shortcode into column item textarea
     */

    builder.on('click', '.mfn-sc-add-list a', function() {

      var sc = $(this).attr('data-rel');

      // hide add shortcode menu

      $(this).closest('.mfn-sc-add').removeClass('focus');

      if (sc) {
        var shortcode = shortcodes[sc];
        var textarea = $(this).closest('td').find('textarea');
        wrapText(textarea, shortcode, '');
      }

    });

    /**
     * Lorem Ipsum generator
     * Return random lorem ipsum text
     */

    function lipsum() {
      var lorems = [
        'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla mauris dolor, gravida a varius blandit, auctor eget purus. Phasellus scelerisque sapien sit amet mauris laoreet, eget scelerisque nunc cursus. Duis ultricies malesuada leo vel aliquet. Curabitur rutrum porta dui eget mollis. Nullam lacinia dictum auctor. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculu.',
        'Duis dignissim mi ut laoreet mollis. Nunc id tellus finibus, eleifend mi vel, maximus justo. Maecenas mi tortor, pellentesque a aliquam ut, fringilla eleifend lectus. Maecenas ultrices tellus sit amet sem placerat tempor. Maecenas eget arcu venenatis, sagittis felis sit amet, dictum nisl. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Phasellus vitae vulputate elit. Fusce interdum justo quis libero ultricies laoreet. ',
        'Curabitur sed iaculis dolor, non congue ligula. Maecenas imperdiet ante eget hendrerit posuere. Nunc urna libero, congue porta nibh a, semper feugiat sem. Sed auctor dui eleifend, scelerisque eros ut, pellentesque nibh. Nam lacinia suscipit accumsan. Donec sodales, neque vitae rutrum convallis, nulla tortor pharetra odio, in varius ante ante sed nisi. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. ',
        'Mauris rhoncus orci in imperdiet placerat. Vestibulum euismod nisl suscipit ligula volutpat, a feugiat urna maximus. Cras massa nibh, tincidunt ut eros a, vulputate consequat odio. Vestibulum vehicula tempor nulla, sed hendrerit urna interdum in. Donec et nibh maximus, congue est eu, mattis nunc. Praesent ut quam quis quam venenatis fringilla. Morbi vestibulum id tellus commodo mattis. Aliquam erat volutpat. Aenean accumsan id mi nec semper. ',
        'Sed ultrices nisl velit, eu ornare est ullamcorper a. Nunc quis nibh magna. Proin risus erat, fringilla vel purus sit amet, mattis porta enim. Duis fermentum faucibus est, sed vehicula velit sodales vitae. Mauris mollis lobortis turpis, eget accumsan ante aliquam quis. Nam ullamcorper rhoncus sem vitae tempus. Curabitur ut tortor a orci fermentum ultricies. Mauris maximus velit commodo, varius ligula vel, consequat est. ',
        'Ut ultricies imperdiet sodales. Aliquam fringilla aliquam ex sit amet elementum. Proin bibendum sollicitudin feugiat. Curabitur ut egestas justo, vitae molestie ante. Integer magna purus, commodo in diam nec, pretium auctor sapien. In pulvinar, ipsum eu dignissim facilisis, massa justo varius purus, non dictum elit nibh ut massa. Nam massa erat, aliquet a rutrum eu, sagittis ac nibh. Pellentesque velit dolor, suscipit in ligula a, suscipit rhoncus dui. ',
        'Aliquam ac dui vel dui vulputate consectetur. Mauris accumsan, massa non consectetur condimentum, diam arcu tristique nibh, nec egestas diam elit at nulla. Suspendisse potenti. In non lacinia risus, ac tempor ipsum. Phasellus venenatis leo eu semper varius. Maecenas sit amet molestie leo. Morbi vitae urna mauris. Nulla nec tortor vitae eros iaculis hendrerit aliquet non urna. Nulla sit amet vestibulum magna, eget pulvinar libero. ',
        'Fusce ut velit laoreet, tempus arcu eu, molestie tortor. Nam vel justo cursus, faucibus lorem eget, egestas eros. Maecenas eleifend erat at justo fringilla imperdiet id ac magna. Suspendisse vel facilisis odio, at ornare nibh. In malesuada, tortor eget sodales mollis, mauris lectus hendrerit purus, porttitor finibus eros lorem eget mauris. Curabitur lacinia enim at ex blandit, vel pellentesque odio elementum. ',
        'Vivamus in diam turpis. In condimentum maximus tristique. Maecenas non laoreet odio. Fusce lobortis porttitor purus, vel vestibulum libero pharetra vel. Pellentesque lorem augue, fermentum nec nibh et, fringilla sollicitudin orci. Integer pharetra magna non ante blandit lobortis. Sed mollis consequat eleifend. Aliquam consectetur orci eget dictum tristique. Aenean et sodales est, ut vestibulum lorem. ',
      ];

      var index = Math.floor(Math.random() * lorems.length);

      return lorems[index];
    }

    /**
     * HTML tag | Add
     * Add HTML tag into column item textarea
     */

    builder.on('click', '.mfn-sc-tools a', function() {

      var open = $(this).attr('data-open').replace(/X/g, '"');
      var close = $(this).attr('data-close');

      var textarea = $(this).closest('td').find('textarea');

      // insert random lorem ipsum text

      if (open == 'lipsum') {
        wrapText(textarea, lipsum(), '');
        return false;
      }

      // insert single tag or tag with beginning and end

      if (close) {
        open = '<' + open + '>';
        close = '</' + close + '>';
      } else {
        open = '<' + open + ' />';
        close = '';
      }

      wrapText(textarea, open, close);

    });

  }

  /**
   * $(document).ready
   * Specify a function to execute when the DOM is fully loaded.
   */

  $(function($) {
    mfnBuilder();
  });

  /**
   * $(document).mouseup
   * Specify a function to execute when the DOM is fully loaded.
   */

  $(document).mouseup(function(e) {
    if ($(".mfn-sc-add").has(e.target).length === 0) {
      $(".mfn-sc-add").removeClass('focus');
    }
  });

  /**
   * Clone fix
   * Fixed native clone function for textarea and select fields
   */

  (function(original) {
    jQuery.fn.clone = function() {
      var result = original.apply(this, arguments),
        my_textareas = this.find('textarea:not(.editor), select'),
        result_textareas = result.find('textarea:not(.editor), select');

      for (var i = 0, l = my_textareas.length; i < l; ++i) {
        jQuery(result_textareas[i]).val(jQuery(my_textareas[i]).val());
      }

      return result;
    };
  })(jQuery.fn.clone);

})(jQuery);
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