text: (function($, window, document, undefined) {
  
      'use strict';
  
      var defaults = {
          thumbnail: true,
  
          animateThumb: true,
          currentPagerPosition: 'middle',
  
          thumbWidth: 100,
          thumbContHeight: 100,
          thumbMargin: 5,
  
          exThumbImage: false,
          showThumbByDefault: true,
          toogleThumb: true,
          pullCaptionUp: true,
  
          enableThumbDrag: true,
          enableThumbSwipe: true,
          swipeThreshold: 50,
  
          loadYoutubeThumbnail: true,
          youtubeThumbSize: 1,
  
          loadVimeoThumbnail: true,
          vimeoThumbSize: 'thumbnail_small',
  
          loadDailymotionThumbnail: true
      };
  
      var Thumbnail = function(element) {
  
          // get lightGallery core plugin data
          this.core = $(element).data('lightGallery');
  
          // extend module default settings with lightGallery core settings
          this.core.s = $.extend({}, defaults, this.core.s);
  
          this.$el = $(element);
          this.$thumbOuter = null;
          this.thumbOuterWidth = 0;
          this.thumbTotalWidth = (this.core.$items.length * (this.core.s.thumbWidth + this.core.s.thumbMargin));
          this.thumbIndex = this.core.index;
  
          // Thumbnail animation value
          this.left = 0;
  
          this.init();
  
          return this;
      };
  
      Thumbnail.prototype.init = function() {
          var _this = this;
          if (this.core.s.thumbnail && this.core.$items.length > 1) {
              if (this.core.s.showThumbByDefault) {
                  setTimeout(function(){
                      _this.core.$outer.addClass('lg-thumb-open');
                  }, 700);
              }
  
              if (this.core.s.pullCaptionUp) {
                  this.core.$outer.addClass('lg-pull-caption-up');
              }
  
              this.build();
              if (this.core.s.animateThumb) {
                  if (this.core.s.enableThumbDrag && !this.core.isTouch && this.core.doCss()) {
                      this.enableThumbDrag();
                  }
  
                  if (this.core.s.enableThumbSwipe && this.core.isTouch && this.core.doCss()) {
                      this.enableThumbSwipe();
                  }
  
                  this.thumbClickable = false;
              } else {
                  this.thumbClickable = true;
              }
  
              this.toogle();
              this.thumbkeyPress();
          }
      };
  
      Thumbnail.prototype.build = function() {
          var _this = this;
          var thumbList = '';
          var vimeoErrorThumbSize = '';
          var $thumb;
          var html = '<div class="lg-thumb-outer">' +
              '<div class="lg-thumb group">' +
              '</div>' +
              '</div>';
  
          switch (this.core.s.vimeoThumbSize) {
              case 'thumbnail_large':
                  vimeoErrorThumbSize = '640';
                  break;
              case 'thumbnail_medium':
                  vimeoErrorThumbSize = '200x150';
                  break;
              case 'thumbnail_small':
                  vimeoErrorThumbSize = '100x75';
          }
  
          _this.core.$outer.addClass('lg-has-thumb');
  
          _this.core.$outer.find('.lg').append(html);
  
          _this.$thumbOuter = _this.core.$outer.find('.lg-thumb-outer');
          _this.thumbOuterWidth = _this.$thumbOuter.width();
  
          if (_this.core.s.animateThumb) {
              _this.core.$outer.find('.lg-thumb').css({
                  width: _this.thumbTotalWidth + 'px',
                  position: 'relative'
              });
          }
  
          if (this.core.s.animateThumb) {
              _this.$thumbOuter.css('height', _this.core.s.thumbContHeight + 'px');
          }
  
          function getThumb(src, thumb, index) {
              var isVideo = _this.core.isVideo(src, index) || {};
              var thumbImg;
              var vimeoId = '';
  
              if (isVideo.youtube || isVideo.vimeo || isVideo.dailymotion) {
                  if (isVideo.youtube) {
                      if (_this.core.s.loadYoutubeThumbnail) {
                          thumbImg = '//img.youtube.com/vi/' + isVideo.youtube[1] + '/' + _this.core.s.youtubeThumbSize + '.jpg';
                      } else {
                          thumbImg = thumb;
                      }
                  } else if (isVideo.vimeo) {
                      if (_this.core.s.loadVimeoThumbnail) {
                          thumbImg = '//i.vimeocdn.com/video/error_' + vimeoErrorThumbSize + '.jpg';
                          vimeoId = isVideo.vimeo[1];
                      } else {
                          thumbImg = thumb;
                      }
                  } else if (isVideo.dailymotion) {
                      if (_this.core.s.loadDailymotionThumbnail) {
                          thumbImg = '//www.dailymotion.com/thumbnail/video/' + isVideo.dailymotion[1];
                      } else {
                          thumbImg = thumb;
                      }
                  }
              } else {
                  thumbImg = thumb;
              }
  
              thumbList += '<div data-vimeo-id="' + vimeoId + '" class="lg-thumb-item" style="width:' + _this.core.s.thumbWidth + 'px; margin-right: ' + _this.core.s.thumbMargin + 'px"><img src="' + thumbImg + '" /></div>';
              vimeoId = '';
          }
  
          if (_this.core.s.dynamic) {
              for (var i = 0; i < _this.core.s.dynamicEl.length; i++) {
                  getThumb(_this.core.s.dynamicEl[i].src, _this.core.s.dynamicEl[i].thumb, i);
              }
          } else {
              _this.core.$items.each(function(i) {
  
                  if (!_this.core.s.exThumbImage) {
                      getThumb($(this).attr('href') || $(this).attr('data-src'), $(this).find('img').attr('src'), i);
                  } else {
                      getThumb($(this).attr('href') || $(this).attr('data-src'), $(this).attr(_this.core.s.exThumbImage), i);
                  }
  
              });
          }
  
          _this.core.$outer.find('.lg-thumb').html(thumbList);
  
          $thumb = _this.core.$outer.find('.lg-thumb-item');
  
          // Load vimeo thumbnails
          $thumb.each(function() {
              var $this = $(this);
              var vimeoVideoId = $this.attr('data-vimeo-id');
  
              if (vimeoVideoId) {
                  $.getJSON('//www.vimeo.com/api/v2/video/' + vimeoVideoId + '.json?callback=?', {
                      format: 'json'
                  }, function(data) {
                      $this.find('img').attr('src', data[0][_this.core.s.vimeoThumbSize]);
                  });
              }
          });
  
          // manage active class for thumbnail
          $thumb.eq(_this.core.index).addClass('active');
          _this.core.$el.on('onBeforeSlide.lg.tm', function() {
              $thumb.removeClass('active');
              $thumb.eq(_this.core.index).addClass('active');
          });
  
          $thumb.on('click.lg touchend.lg', function() {
              var _$this = $(this);
              setTimeout(function() {
  
                  // In IE9 and bellow touch does not support
                  // Go to slide if browser does not support css transitions
                  if ((_this.thumbClickable && !_this.core.lgBusy) || !_this.core.doCss()) {
                      _this.core.index = _$this.index();
                      _this.core.slide(_this.core.index, false, true);
                  }
              }, 50);
          });
  
          _this.core.$el.on('onBeforeSlide.lg.tm', function() {
              _this.animateThumb(_this.core.index);
          });
  
          $(window).on('resize.lg.thumb orientationchange.lg.thumb', function() {
              setTimeout(function() {
                  _this.animateThumb(_this.core.index);
                  _this.thumbOuterWidth = _this.$thumbOuter.width();
              }, 200);
          });
  
      };
  
      Thumbnail.prototype.setTranslate = function(value) {
          // jQuery supports Automatic CSS prefixing since jQuery 1.8.0
          this.core.$outer.find('.lg-thumb').css({
              transform: 'translate3d(-' + (value) + 'px, 0px, 0px)'
          });
      };
  
      Thumbnail.prototype.animateThumb = function(index) {
          var $thumb = this.core.$outer.find('.lg-thumb');
          if (this.core.s.animateThumb) {
              var position;
              switch (this.core.s.currentPagerPosition) {
                  case 'left':
                      position = 0;
                      break;
                  case 'middle':
                      position = (this.thumbOuterWidth / 2) - (this.core.s.thumbWidth / 2);
                      break;
                  case 'right':
                      position = this.thumbOuterWidth - this.core.s.thumbWidth;
              }
              this.left = ((this.core.s.thumbWidth + this.core.s.thumbMargin) * index - 1) - position;
              if (this.left > (this.thumbTotalWidth - this.thumbOuterWidth)) {
                  this.left = this.thumbTotalWidth - this.thumbOuterWidth;
              }
  
              if (this.left < 0) {
                  this.left = 0;
              }
  
              if (this.core.lGalleryOn) {
                  if (!$thumb.hasClass('on')) {
                      this.core.$outer.find('.lg-thumb').css('transition-duration', this.core.s.speed + 'ms');
                  }
  
                  if (!this.core.doCss()) {
                      $thumb.animate({
                          left: -this.left + 'px'
                      }, this.core.s.speed);
                  }
              } else {
                  if (!this.core.doCss()) {
                      $thumb.css('left', -this.left + 'px');
                  }
              }
  
              this.setTranslate(this.left);
  
          }
      };
  
      // Enable thumbnail dragging and swiping
      Thumbnail.prototype.enableThumbDrag = function() {
  
          var _this = this;
          var startCoords = 0;
          var endCoords = 0;
          var isDraging = false;
          var isMoved = false;
          var tempLeft = 0;
  
          _this.$thumbOuter.addClass('lg-grab');
  
          _this.core.$outer.find('.lg-thumb').on('mousedown.lg.thumb', function(e) {
              if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
                  // execute only on .lg-object
                  e.preventDefault();
                  startCoords = e.pageX;
                  isDraging = true;
  
                  // ** Fix for webkit cursor issue https://code.google.com/p/chromium/issues/detail?id=26723
                  _this.core.$outer.scrollLeft += 1;
                  _this.core.$outer.scrollLeft -= 1;
  
                  // *
                  _this.thumbClickable = false;
                  _this.$thumbOuter.removeClass('lg-grab').addClass('lg-grabbing');
              }
          });
  
          $(window).on('mousemove.lg.thumb', function(e) {
              if (isDraging) {
                  tempLeft = _this.left;
                  isMoved = true;
                  endCoords = e.pageX;
  
                  _this.$thumbOuter.addClass('lg-dragging');
  
                  tempLeft = tempLeft - (endCoords - startCoords);
  
                  if (tempLeft > (_this.thumbTotalWidth - _this.thumbOuterWidth)) {
                      tempLeft = _this.thumbTotalWidth - _this.thumbOuterWidth;
                  }
  
                  if (tempLeft < 0) {
                      tempLeft = 0;
                  }
  
                  // move current slide
                  _this.setTranslate(tempLeft);
  
              }
          });
  
          $(window).on('mouseup.lg.thumb', function() {
              if (isMoved) {
                  isMoved = false;
                  _this.$thumbOuter.removeClass('lg-dragging');
  
                  _this.left = tempLeft;
  
                  if (Math.abs(endCoords - startCoords) < _this.core.s.swipeThreshold) {
                      _this.thumbClickable = true;
                  }
  
              } else {
                  _this.thumbClickable = true;
              }
  
              if (isDraging) {
                  isDraging = false;
                  _this.$thumbOuter.removeClass('lg-grabbing').addClass('lg-grab');
              }
          });
  
      };
  
      Thumbnail.prototype.enableThumbSwipe = function() {
          var _this = this;
          var startCoords = 0;
          var endCoords = 0;
          var isMoved = false;
          var tempLeft = 0;
  
          _this.core.$outer.find('.lg-thumb').on('touchstart.lg', function(e) {
              if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
                  e.preventDefault();
                  startCoords = e.originalEvent.targetTouches[0].pageX;
                  _this.thumbClickable = false;
              }
          });
  
          _this.core.$outer.find('.lg-thumb').on('touchmove.lg', function(e) {
              if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
                  e.preventDefault();
                  endCoords = e.originalEvent.targetTouches[0].pageX;
                  isMoved = true;
  
                  _this.$thumbOuter.addClass('lg-dragging');
  
                  tempLeft = _this.left;
  
                  tempLeft = tempLeft - (endCoords - startCoords);
  
                  if (tempLeft > (_this.thumbTotalWidth - _this.thumbOuterWidth)) {
                      tempLeft = _this.thumbTotalWidth - _this.thumbOuterWidth;
                  }
  
                  if (tempLeft < 0) {
                      tempLeft = 0;
                  }
  
                  // move current slide
                  _this.setTranslate(tempLeft);
  
              }
          });
  
          _this.core.$outer.find('.lg-thumb').on('touchend.lg', function() {
              if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
  
                  if (isMoved) {
                      isMoved = false;
                      _this.$thumbOuter.removeClass('lg-dragging');
                      if (Math.abs(endCoords - startCoords) < _this.core.s.swipeThreshold) {
                          _this.thumbClickable = true;
                      }
  
                      _this.left = tempLeft;
                  } else {
                      _this.thumbClickable = true;
                  }
              } else {
                  _this.thumbClickable = true;
              }
          });
  
      };
  
      Thumbnail.prototype.toogle = function() {
          var _this = this;
          if (_this.core.s.toogleThumb) {
              _this.core.$outer.addClass('lg-can-toggle');
              _this.$thumbOuter.append('<span class="lg-toogle-thumb lg-icon"></span>');
              _this.core.$outer.find('.lg-toogle-thumb').on('click.lg', function() {
                  _this.core.$outer.toggleClass('lg-thumb-open');
              });
          }
      };
  
      Thumbnail.prototype.thumbkeyPress = function() {
          var _this = this;
          $(window).on('keydown.lg.thumb', function(e) {
              if (e.keyCode === 38) {
                  e.preventDefault();
                  _this.core.$outer.addClass('lg-thumb-open');
              } else if (e.keyCode === 40) {
                  e.preventDefault();
                  _this.core.$outer.removeClass('lg-thumb-open');
              }
          });
      };
  
      Thumbnail.prototype.destroy = function() {
          if (this.core.s.thumbnail && this.core.$items.length > 1) {
              $(window).off('resize.lg.thumb orientationchange.lg.thumb keydown.lg.thumb');
              this.$thumbOuter.remove();
              this.core.$outer.removeClass('lg-has-thumb');
          }
      };
  
      $.fn.lightGallery.modules.Thumbnail = Thumbnail;
  
  })(jQuery, window, document);
  