core.js

(function(window, document, $, undefined) {
  "use strict";

  window.console = window.console || {
    info: function(stuff) {}
  };

  // If there's no jQuery, fancyBox can't work
  // =========================================

  if (!$) {
    return;
  }

  // Check if fancyBox is already initialized
  // ========================================

  if ($.fn.fancybox) {
    console.info("fancyBox already initialized");

    return;
  }

  // Private default settings
  // ========================

  var defaults = {
    // Close existing modals
    // Set this to false if you do not need to stack multiple instances
    closeExisting: false,

    // Enable infinite gallery navigation
    loop: false,

    // Horizontal space between slides
    gutter: 50,

    // Enable keyboard navigation
    keyboard: true,

    // Should allow caption to overlap the content
    preventCaptionOverlap: true,

    // Should display navigation arrows at the screen edges
    arrows: true,

    // Should display counter at the top left corner
    infobar: true,

    // Should display close button (using `btnTpl.smallBtn` template) over the content
    // Can be true, false, "auto"
    // If "auto" - will be automatically enabled for "html", "inline" or "ajax" items
    smallBtn: "auto",

    // Should display toolbar (buttons at the top)
    // Can be true, false, "auto"
    // If "auto" - will be automatically hidden if "smallBtn" is enabled
    toolbar: "auto",

    // What buttons should appear in the top right corner.
    // Buttons will be created using templates from `btnTpl` option
    // and they will be placed into toolbar (class="fancybox-toolbar"` element)
    buttons: [
      "zoom",
      //"share",
      "slideShow",
      //"fullScreen",
      //"download",
      "thumbs",
      "close"
    ],

    // Detect "idle" time in seconds
    idleTime: 3,

    // Disable right-click and use simple image protection for images
    protect: false,

    // Shortcut to make content "modal" - disable keyboard navigtion, hide buttons, etc
    modal: false,

    image: {
      // Wait for images to load before displaying
      //   true  - wait for image to load and then display;
      //   false - display thumbnail and load the full-sized image over top,
      //           requires predefined image dimensions (`data-width` and `data-height` attributes)
      preload: false
    },

    ajax: {
      // Object containing settings for ajax request
      settings: {
        // This helps to indicate that request comes from the modal
        // Feel free to change naming
        data: {
          fancybox: true
        }
      }
    },

    iframe: {
      // Iframe template
      tpl:
        '<iframe id="fancybox-frame{rnd}" name="fancybox-frame{rnd}" class="fancybox-iframe" allowfullscreen="allowfullscreen" allow="autoplay; fullscreen" src=""></iframe>',

      // Preload iframe before displaying it
      // This allows to calculate iframe content width and height
      // (note: Due to "Same Origin Policy", you can't get cross domain data).
      preload: true,

      // Custom CSS styling for iframe wrapping element
      // You can use this to set custom iframe dimensions
      css: {},

      // Iframe tag attributes
      attr: {
        scrolling: "auto"
      }
    },

    // For HTML5 video only
    video: {
      tpl:
        '<video class="fancybox-video" controls controlsList="nodownload" poster="{{poster}}">' +
        '<source src="{{src}}" type="{{format}}" />' +
        'Sorry, your browser doesn\'t support embedded videos, <a href="{{src}}">download</a> and watch with your favorite video player!' +
        "</video>",
      format: "", // custom video format
      autoStart: true
    },

    // Default content type if cannot be detected automatically
    defaultType: "image",

    // Open/close animation type
    // Possible values:
    //   false            - disable
    //   "zoom"           - zoom images from/to thumbnail
    //   "fade"
    //   "zoom-in-out"
    //
    animationEffect: "zoom",

    // Duration in ms for open/close animation
    animationDuration: 366,

    // Should image change opacity while zooming
    // If opacity is "auto", then opacity will be changed if image and thumbnail have different aspect ratios
    zoomOpacity: "auto",

    // Transition effect between slides
    //
    // Possible values:
    //   false            - disable
    //   "fade'
    //   "slide'
    //   "circular'
    //   "tube'
    //   "zoom-in-out'
    //   "rotate'
    //
    transitionEffect: "fade",

    // Duration in ms for transition animation
    transitionDuration: 366,

    // Custom CSS class for slide element
    slideClass: "",

    // Custom CSS class for layout
    baseClass: "",

    // Base template for layout
    baseTpl:
      '<div class="fancybox-container" role="dialog" tabindex="-1">' +
      '<div class="fancybox-bg"></div>' +
      '<div class="fancybox-inner">' +
      '<div class="fancybox-infobar"><span data-fancybox-index></span>&nbsp;/&nbsp;<span data-fancybox-count></span></div>' +
      '<div class="fancybox-toolbar">{{buttons}}</div>' +
      '<div class="fancybox-navigation">{{arrows}}</div>' +
      '<div class="fancybox-stage"></div>' +
      '<div class="fancybox-caption"><div class="fancybox-caption__body"></div></div>' +
      "</div>" +
      "</div>",

    // Loading indicator template
    spinnerTpl: '<div class="fancybox-loading"></div>',

    // Error message template
    errorTpl: '<div class="fancybox-error"><p>{{ERROR}}</p></div>',

    btnTpl: {
      download:
        '<a download data-fancybox-download class="fancybox-button fancybox-button--download" title="{{DOWNLOAD}}" href="javascript:;">' +
        '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M18.62 17.09V19H5.38v-1.91zm-2.97-6.96L17 11.45l-5 4.87-5-4.87 1.36-1.32 2.68 2.64V5h1.92v7.77z"/></svg>' +
        "</a>",

      zoom:
        '<button data-fancybox-zoom class="fancybox-button fancybox-button--zoom" title="{{ZOOM}}">' +
        '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M18.7 17.3l-3-3a5.9 5.9 0 0 0-.6-7.6 5.9 5.9 0 0 0-8.4 0 5.9 5.9 0 0 0 0 8.4 5.9 5.9 0 0 0 7.7.7l3 3a1 1 0 0 0 1.3 0c.4-.5.4-1 0-1.5zM8.1 13.8a4 4 0 0 1 0-5.7 4 4 0 0 1 5.7 0 4 4 0 0 1 0 5.7 4 4 0 0 1-5.7 0z"/></svg>' +
        "</button>",

      close:
        '<button data-fancybox-close class="fancybox-button fancybox-button--close" title="{{CLOSE}}">' +
        '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 10.6L6.6 5.2 5.2 6.6l5.4 5.4-5.4 5.4 1.4 1.4 5.4-5.4 5.4 5.4 1.4-1.4-5.4-5.4 5.4-5.4-1.4-1.4-5.4 5.4z"/></svg>' +
        "</button>",

      // Arrows
      arrowLeft:
        '<button data-fancybox-prev class="fancybox-button fancybox-button--arrow_left" title="{{PREV}}">' +
        '<div><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M11.28 15.7l-1.34 1.37L5 12l4.94-5.07 1.34 1.38-2.68 2.72H19v1.94H8.6z"/></svg></div>' +
        "</button>",

      arrowRight:
        '<button data-fancybox-next class="fancybox-button fancybox-button--arrow_right" title="{{NEXT}}">' +
        '<div><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M15.4 12.97l-2.68 2.72 1.34 1.38L19 12l-4.94-5.07-1.34 1.38 2.68 2.72H5v1.94z"/></svg></div>' +
        "</button>",

      // This small close button will be appended to your html/inline/ajax content by default,
      // if "smallBtn" option is not set to false
      smallBtn:
        '<button type="button" data-fancybox-close class="fancybox-button fancybox-close-small" title="{{CLOSE}}">' +
        '<svg xmlns="http://www.w3.org/2000/svg" version="1" viewBox="0 0 24 24"><path d="M13 12l5-5-1-1-5 5-5-5-1 1 5 5-5 5 1 1 5-5 5 5 1-1z"/></svg>' +
        "</button>"
    },

    // Container is injected into this element
    parentEl: "body",

    // Hide browser vertical scrollbars; use at your own risk
    hideScrollbar: true,

    // Focus handling
    // ==============

    // Try to focus on the first focusable element after opening
    autoFocus: true,

    // Put focus back to active element after closing
    backFocus: true,

    // Do not let user to focus on element outside modal content
    trapFocus: true,

    // Module specific options
    // =======================

    fullScreen: {
      autoStart: false
    },

    // Set `touch: false` to disable panning/swiping
    touch: {
      vertical: true, // Allow to drag content vertically
      momentum: true // Continue movement after releasing mouse/touch when panning
    },

    // Hash value when initializing manually,
    // set `false` to disable hash change
    hash: null,

    // Customize or add new media types
    // Example:
    /*
      media : {
        youtube : {
          params : {
            autoplay : 0
          }
        }
      }
    */
    media: {},

    slideShow: {
      autoStart: false,
      speed: 3000
    },

    thumbs: {
      autoStart: false, // Display thumbnails on opening
      hideOnClose: true, // Hide thumbnail grid when closing animation starts
      parentEl: ".fancybox-container", // Container is injected into this element
      axis: "y" // Vertical (y) or horizontal (x) scrolling
    },

    // Use mousewheel to navigate gallery
    // If 'auto' - enabled for images only
    wheel: "auto",

    // Callbacks
    //==========

    // See Documentation/API/Events for more information
    // Example:
    /*
      afterShow: function( instance, current ) {
        console.info( 'Clicked element:' );
        console.info( current.opts.$orig );
      }
    */

    onInit: $.noop, // When instance has been initialized

    beforeLoad: $.noop, // Before the content of a slide is being loaded
    afterLoad: $.noop, // When the content of a slide is done loading

    beforeShow: $.noop, // Before open animation starts
    afterShow: $.noop, // When content is done loading and animating

    beforeClose: $.noop, // Before the instance attempts to close. Return false to cancel the close.
    afterClose: $.noop, // After instance has been closed

    onActivate: $.noop, // When instance is brought to front
    onDeactivate: $.noop, // When other instance has been activated

    // Interaction
    // ===========

    // Use options below to customize taken action when user clicks or double clicks on the fancyBox area,
    // each option can be string or method that returns value.
    //
    // Possible values:
    //   "close"           - close instance
    //   "next"            - move to next gallery item
    //   "nextOrClose"     - move to next gallery item or close if gallery has only one item
    //   "toggleControls"  - show/hide controls
    //   "zoom"            - zoom image (if loaded)
    //   false             - do nothing

    // Clicked on the content
    clickContent: function(current, event) {
      return current.type === "image" ? "zoom" : false;
    },

    // Clicked on the slide
    clickSlide: "close",

    // Clicked on the background (backdrop) element;
    // if you have not changed the layout, then most likely you need to use `clickSlide` option
    clickOutside: "close",

    // Same as previous two, but for double click
    dblclickContent: false,
    dblclickSlide: false,
    dblclickOutside: false,

    // Custom options when mobile device is detected
    // =============================================

    mobile: {
      preventCaptionOverlap: false,
      idleTime: false,
      clickContent: function(current, event) {
        return current.type === "image" ? "toggleControls" : false;
      },
      clickSlide: function(current, event) {
        return current.type === "image" ? "toggleControls" : "close";
      },
      dblclickContent: function(current, event) {
        return current.type === "image" ? "zoom" : false;
      },
      dblclickSlide: function(current, event) {
        return current.type === "image" ? "zoom" : false;
      }
    },

    // Internationalization
    // ====================

    lang: "en",
    i18n: {
      en: {
        CLOSE: "Close",
        NEXT: "Next",
        PREV: "Previous",
        ERROR: "The requested content cannot be loaded. <br/> Please try again later.",
        PLAY_START: "Start slideshow",
        PLAY_STOP: "Pause slideshow",
        FULL_SCREEN: "Full screen",
        THUMBS: "Thumbnails",
        DOWNLOAD: "Download",
        SHARE: "Share",
        ZOOM: "Zoom"
      },
      de: {
        CLOSE: "Schlie&szlig;en",
        NEXT: "Weiter",
        PREV: "Zur&uuml;ck",
        ERROR: "Die angeforderten Daten konnten nicht geladen werden. <br/> Bitte versuchen Sie es sp&auml;ter nochmal.",
        PLAY_START: "Diaschau starten",
        PLAY_STOP: "Diaschau beenden",
        FULL_SCREEN: "Vollbild",
        THUMBS: "Vorschaubilder",
        DOWNLOAD: "Herunterladen",
        SHARE: "Teilen",
        ZOOM: "Vergr&ouml;&szlig;ern"
      }
    }
  };

  // Few useful variables and methods
  // ================================

  var $W = $(window);
  var $D = $(document);

  var called = 0;

  // Check if an object is a jQuery object and not a native JavaScript object
  // ========================================================================
  var isQuery = function(obj) {
    return obj && obj.hasOwnProperty && obj instanceof $;
  };

  // Handle multiple browsers for "requestAnimationFrame" and "cancelAnimationFrame"
  // ===============================================================================
  var requestAFrame = (function() {
    return (
      window.requestAnimationFrame ||
      window.webkitRequestAnimationFrame ||
      window.mozRequestAnimationFrame ||
      window.oRequestAnimationFrame ||
      // if all else fails, use setTimeout
      function(callback) {
        return window.setTimeout(callback, 1000 / 60);
      }
    );
  })();

  var cancelAFrame = (function() {
    return (
      window.cancelAnimationFrame ||
      window.webkitCancelAnimationFrame ||
      window.mozCancelAnimationFrame ||
      window.oCancelAnimationFrame ||
      function(id) {
        window.clearTimeout(id);
      }
    );
  })();

  // Detect the supported transition-end event property name
  // =======================================================
  var transitionEnd = (function() {
    var el = document.createElement("fakeelement"),
      t;

    var transitions = {
      transition: "transitionend",
      OTransition: "oTransitionEnd",
      MozTransition: "transitionend",
      WebkitTransition: "webkitTransitionEnd"
    };

    for (t in transitions) {
      if (el.style[t] !== undefined) {
        return transitions[t];
      }
    }

    return "transitionend";
  })();

  // Force redraw on an element.
  // This helps in cases where the browser doesn't redraw an updated element properly
  // ================================================================================
  var forceRedraw = function($el) {
    return $el && $el.length && $el[0].offsetHeight;
  };

  // Exclude array (`buttons`) options from deep merging
  // ===================================================
  var mergeOpts = function(opts1, opts2) {
    var rez = $.extend(true, {}, opts1, opts2);

    $.each(opts2, function(key, value) {
      if ($.isArray(value)) {
        rez[key] = value;
      }
    });

    return rez;
  };

  // How much of an element is visible in viewport
  // =============================================

  var inViewport = function(elem) {
    var elemCenter, rez;

    if (!elem || elem.ownerDocument !== document) {
      return false;
    }

    $(".fancybox-container").css("pointer-events", "none");

    elemCenter = {
      x: elem.getBoundingClientRect().left + elem.offsetWidth / 2,
      y: elem.getBoundingClientRect().top + elem.offsetHeight / 2
    };

    rez = document.elementFromPoint(elemCenter.x, elemCenter.y) === elem;

    $(".fancybox-container").css("pointer-events", "");

    return rez;
  };

  // Class definition
  // ================

  var FancyBox = function(content, opts, index) {
    var self = this;

    self.opts = mergeOpts({index: index}, $.fancybox.defaults);

    if ($.isPlainObject(opts)) {
      self.opts = mergeOpts(self.opts, opts);
    }

    if ($.fancybox.isMobile) {
      self.opts = mergeOpts(self.opts, self.opts.mobile);
    }

    self.id = self.opts.id || ++called;

    self.currIndex = parseInt(self.opts.index, 10) || 0;
    self.prevIndex = null;

    self.prevPos = null;
    self.currPos = 0;

    self.firstRun = true;

    // All group items
    self.group = [];

    // Existing slides (for current, next and previous gallery items)
    self.slides = {};

    // Create group elements
    self.addContent(content);

    if (!self.group.length) {
      return;
    }

    self.init();
  };

  $.extend(FancyBox.prototype, {
    // Create DOM structure
    // ====================

    init: function() {
      var self = this,
        firstItem = self.group[self.currIndex],
        firstItemOpts = firstItem.opts,
        $container,
        buttonStr;

      if (firstItemOpts.closeExisting) {
        $.fancybox.close(true);
      }

      // Hide scrollbars
      // ===============

      $("body").addClass("fancybox-active");

      if (
        !$.fancybox.getInstance() &&
        firstItemOpts.hideScrollbar !== false &&
        !$.fancybox.isMobile &&
        document.body.scrollHeight > window.innerHeight
      ) {
        $("head").append(
          '<style id="fancybox-style-noscroll" type="text/css">.compensate-for-scrollbar{margin-right:' +
            (window.innerWidth - document.documentElement.clientWidth) +
            "px;}</style>"
        );

        $("body").addClass("compensate-for-scrollbar");
      }

      // Build html markup and set references
      // ====================================

      // Build html code for buttons and insert into main template
      buttonStr = "";

      $.each(firstItemOpts.buttons, function(index, value) {
        buttonStr += firstItemOpts.btnTpl[value] || "";
      });

      // Create markup from base template, it will be initially hidden to
      // avoid unnecessary work like painting while initializing is not complete
      $container = $(
        self.translate(
          self,
          firstItemOpts.baseTpl
            .replace("{{buttons}}", buttonStr)
            .replace("{{arrows}}", firstItemOpts.btnTpl.arrowLeft + firstItemOpts.btnTpl.arrowRight)
        )
      )
        .attr("id", "fancybox-container-" + self.id)
        .addClass(firstItemOpts.baseClass)
        .data("FancyBox", self)
        .appendTo(firstItemOpts.parentEl);

      // Create object holding references to jQuery wrapped nodes
      self.$refs = {
        container: $container
      };

      ["bg", "inner", "infobar", "toolbar", "stage", "caption", "navigation"].forEach(function(item) {
        self.$refs[item] = $container.find(".fancybox-" + item);
      });

      self.trigger("onInit");

      // Enable events, deactive previous instances
      self.activate();

      // Build slides, load and reveal content
      self.jumpTo(self.currIndex);
    },

    // Simple i18n support - replaces object keys found in template
    // with corresponding values
    // ============================================================

    translate: function(obj, str) {
      var arr = obj.opts.i18n[obj.opts.lang] || obj.opts.i18n.en;

      return str.replace(/\{\{(\w+)\}\}/g, function(match, n) {
        return arr[n] === undefined ? match : arr[n];
      });
    },

    // Populate current group with fresh content
    // Check if each object has valid type and content
    // ===============================================

    addContent: function(content) {
      var self = this,
        items = $.makeArray(content),
        thumbs;

      $.each(items, function(i, item) {
        var obj = {},
          opts = {},
          $item,
          type,
          found,
          src,
          srcParts;

        // Step 1 - Make sure we have an object
        // ====================================

        if ($.isPlainObject(item)) {
          // We probably have manual usage here, something like
          // $.fancybox.open( [ { src : "image.jpg", type : "image" } ] )

          obj = item;
          opts = item.opts || item;
        } else if ($.type(item) === "object" && $(item).length) {
          // Here we probably have jQuery collection returned by some selector
          $item = $(item);

          // Support attributes like `data-options='{"touch" : false}'` and `data-touch='false'`
          opts = $item.data() || {};
          opts = $.extend(true, {}, opts, opts.options);

          // Here we store clicked element
          opts.$orig = $item;

          obj.src = self.opts.src || opts.src || $item.attr("href");

          // Assume that simple syntax is used, for example:
          //   `$.fancybox.open( $("#test"), {} );`
          if (!obj.type && !obj.src) {
            obj.type = "inline";
            obj.src = item;
          }
        } else {
          // Assume we have a simple html code, for example:
          //   $.fancybox.open( '<div><h1>Hi!</h1></div>' );
          obj = {
            type: "html",
            src: item + ""
          };
        }

        // Each gallery object has full collection of options
        obj.opts = $.extend(true, {}, self.opts, opts);

        // Do not merge buttons array
        if ($.isArray(opts.buttons)) {
          obj.opts.buttons = opts.buttons;
        }

        if ($.fancybox.isMobile && obj.opts.mobile) {
          obj.opts = mergeOpts(obj.opts, obj.opts.mobile);
        }

        // Step 2 - Make sure we have content type, if not - try to guess
        // ==============================================================

        type = obj.type || obj.opts.type;
        src = obj.src || "";

        if (!type && src) {
          if ((found = src.match(/\.(mp4|mov|ogv|webm)((\?|#).*)?$/i))) {
            type = "video";

            if (!obj.opts.video.format) {
              obj.opts.video.format = "video/" + (found[1] === "ogv" ? "ogg" : found[1]);
            }
          } else if (src.match(/(^data:image\/[a-z0-9+\/=]*,)|(\.(jp(e|g|eg)|gif|png|bmp|webp|svg|ico)((\?|#).*)?$)/i)) {
            type = "image";
          } else if (src.match(/\.(pdf)((\?|#).*)?$/i)) {
            type = "iframe";
            obj = $.extend(true, obj, {contentType: "pdf", opts: {iframe: {preload: false}}});
          } else if (src.charAt(0) === "#") {
            type = "inline";
          }
        }

        if (type) {
          obj.type = type;
        } else {
          self.trigger("objectNeedsType", obj);
        }

        if (!obj.contentType) {
          obj.contentType = $.inArray(obj.type, ["html", "inline", "ajax"]) > -1 ? "html" : obj.type;
        }

        // Step 3 - Some adjustments
        // =========================

        obj.index = self.group.length;

        if (obj.opts.smallBtn == "auto") {
          obj.opts.smallBtn = $.inArray(obj.type, ["html", "inline", "ajax"]) > -1;
        }

        if (obj.opts.toolbar === "auto") {
          obj.opts.toolbar = !obj.opts.smallBtn;
        }

        // Find thumbnail image, check if exists and if is in the viewport
        obj.$thumb = obj.opts.$thumb || null;

        if (obj.opts.$trigger && obj.index === self.opts.index) {
          obj.$thumb = obj.opts.$trigger.find("img:first");

          if (obj.$thumb.length) {
            obj.opts.$orig = obj.opts.$trigger;
          }
        }

        if (!(obj.$thumb && obj.$thumb.length) && obj.opts.$orig) {
          obj.$thumb = obj.opts.$orig.find("img:first");
        }

        if (obj.$thumb && !obj.$thumb.length) {
          obj.$thumb = null;
        }

        obj.thumb = obj.opts.thumb || (obj.$thumb ? obj.$thumb[0].src : null);

        // "caption" is a "special" option, it can be used to customize caption per gallery item
        if ($.type(obj.opts.caption) === "function") {
          obj.opts.caption = obj.opts.caption.apply(item, [self, obj]);
        }

        if ($.type(self.opts.caption) === "function") {
          obj.opts.caption = self.opts.caption.apply(item, [self, obj]);
        }

        // Make sure we have caption as a string or jQuery object
        if (!(obj.opts.caption instanceof $)) {
          obj.opts.caption = obj.opts.caption === undefined ? "" : obj.opts.caption + "";
        }

        // Check if url contains "filter" used to filter the content
        // Example: "ajax.html #something"
        if (obj.type === "ajax") {
          srcParts = src.split(/\s+/, 2);

          if (srcParts.length > 1) {
            obj.src = srcParts.shift();

            obj.opts.filter = srcParts.shift();
          }
        }

        // Hide all buttons and disable interactivity for modal items
        if (obj.opts.modal) {
          obj.opts = $.extend(true, obj.opts, {
            trapFocus: true,
            // Remove buttons
            infobar: 0,
            toolbar: 0,

            smallBtn: 0,

            // Disable keyboard navigation
            keyboard: 0,

            // Disable some modules
            slideShow: 0,
            fullScreen: 0,
            thumbs: 0,
            touch: 0,

            // Disable click event handlers
            clickContent: false,
            clickSlide: false,
            clickOutside: false,
            dblclickContent: false,
            dblclickSlide: false,
            dblclickOutside: false
          });
        }

        // Step 4 - Add processed object to group
        // ======================================

        self.group.push(obj);
      });

      // Update controls if gallery is already opened
      if (Object.keys(self.slides).length) {
        self.updateControls();

        // Update thumbnails, if needed
        thumbs = self.Thumbs;

        if (thumbs && thumbs.isActive) {
          thumbs.create();

          thumbs.focus();
        }
      }
    },

    // Attach an event handler functions for:
    //   - navigation buttons
    //   - browser scrolling, resizing;
    //   - focusing
    //   - keyboard
    //   - detecting inactivity
    // ======================================

    addEvents: function() {
      var self = this;

      self.removeEvents();

      // Make navigation elements clickable
      // ==================================

      self.$refs.container
        .on("click.fb-close", "[data-fancybox-close]", function(e) {
          e.stopPropagation();
          e.preventDefault();

          self.close(e);
        })
        .on("touchstart.fb-prev click.fb-prev", "[data-fancybox-prev]", function(e) {
          e.stopPropagation();
          e.preventDefault();

          self.previous();
        })
        .on("touchstart.fb-next click.fb-next", "[data-fancybox-next]", function(e) {
          e.stopPropagation();
          e.preventDefault();

          self.next();
        })
        .on("click.fb", "[data-fancybox-zoom]", function(e) {
          // Click handler for zoom button
          self[self.isScaledDown() ? "scaleToActual" : "scaleToFit"]();
        });

      // Handle page scrolling and browser resizing
      // ==========================================

      $W.on("orientationchange.fb resize.fb", function(e) {
        if (e && e.originalEvent && e.originalEvent.type === "resize") {
          if (self.requestId) {
            cancelAFrame(self.requestId);
          }

          self.requestId = requestAFrame(function() {
            self.update(e);
          });
        } else {
          if (self.current && self.current.type === "iframe") {
            self.$refs.stage.hide();
          }

          setTimeout(
            function() {
              self.$refs.stage.show();

              self.update(e);
            },
            $.fancybox.isMobile ? 600 : 250
          );
        }
      });

      $D.on("keydown.fb", function(e) {
        var instance = $.fancybox ? $.fancybox.getInstance() : null,
          current = instance.current,
          keycode = e.keyCode || e.which;

        // Trap keyboard focus inside of the modal
        // =======================================

        if (keycode == 9) {
          if (current.opts.trapFocus) {
            self.focus(e);
          }

          return;
        }

        // Enable keyboard navigation
        // ==========================

        if (!current.opts.keyboard || e.ctrlKey || e.altKey || e.shiftKey || $(e.target).is("input,textarea,video,audio")) {
          return;
        }

        // Backspace and Esc keys
        if (keycode === 8 || keycode === 27) {
          e.preventDefault();

          self.close(e);

          return;
        }

        // Left arrow and Up arrow
        if (keycode === 37 || keycode === 38) {
          e.preventDefault();

          self.previous();

          return;
        }

        // Righ arrow and Down arrow
        if (keycode === 39 || keycode === 40) {
          e.preventDefault();

          self.next();

          return;
        }

        self.trigger("afterKeydown", e, keycode);
      });

      // Hide controls after some inactivity period
      if (self.group[self.currIndex].opts.idleTime) {
        self.idleSecondsCounter = 0;

        $D.on(
          "mousemove.fb-idle mouseleave.fb-idle mousedown.fb-idle touchstart.fb-idle touchmove.fb-idle scroll.fb-idle keydown.fb-idle",
          function(e) {
            self.idleSecondsCounter = 0;

            if (self.isIdle) {
              self.showControls();
            }

            self.isIdle = false;
          }
        );

        self.idleInterval = window.setInterval(function() {
          self.idleSecondsCounter++;

          if (self.idleSecondsCounter >= self.group[self.currIndex].opts.idleTime && !self.isDragging) {
            self.isIdle = true;
            self.idleSecondsCounter = 0;

            self.hideControls();
          }
        }, 1000);
      }
    },

    // Remove events added by the core
    // ===============================

    removeEvents: function() {
      var self = this;

      $W.off("orientationchange.fb resize.fb");
      $D.off("keydown.fb .fb-idle");

      this.$refs.container.off(".fb-close .fb-prev .fb-next");

      if (self.idleInterval) {
        window.clearInterval(self.idleInterval);

        self.idleInterval = null;
      }
    },

    // Change to previous gallery item
    // ===============================

    previous: function(duration) {
      return this.jumpTo(this.currPos - 1, duration);
    },

    // Change to next gallery item
    // ===========================

    next: function(duration) {
      return this.jumpTo(this.currPos + 1, duration);
    },

    // Switch to selected gallery item
    // ===============================

    jumpTo: function(pos, duration) {
      var self = this,
        groupLen = self.group.length,
        firstRun,
        isMoved,
        loop,
        current,
        previous,
        slidePos,
        stagePos,
        prop,
        diff;

      if (self.isDragging || self.isClosing || (self.isAnimating && self.firstRun)) {
        return;
      }

      // Should loop?
      pos = parseInt(pos, 10);
      loop = self.current ? self.current.opts.loop : self.opts.loop;

      if (!loop && (pos < 0 || pos >= groupLen)) {
        return false;
      }

      // Check if opening for the first time; this helps to speed things up
      firstRun = self.firstRun = !Object.keys(self.slides).length;

      // Create slides
      previous = self.current;

      self.prevIndex = self.currIndex;
      self.prevPos = self.currPos;

      current = self.createSlide(pos);

      if (groupLen > 1) {
        if (loop || current.index < groupLen - 1) {
          self.createSlide(pos + 1);
        }

        if (loop || current.index > 0) {
          self.createSlide(pos - 1);
        }
      }

      self.current = current;
      self.currIndex = current.index;
      self.currPos = current.pos;

      self.trigger("beforeShow", firstRun);

      self.updateControls();

      // Validate duration length
      current.forcedDuration = undefined;

      if ($.isNumeric(duration)) {
        current.forcedDuration = duration;
      } else {
        duration = current.opts[firstRun ? "animationDuration" : "transitionDuration"];
      }

      duration = parseInt(duration, 10);

      // Check if user has swiped the slides or if still animating
      isMoved = self.isMoved(current);

      // Make sure current slide is visible
      current.$slide.addClass("fancybox-slide--current");

      // Fresh start - reveal container, current slide and start loading content
      if (firstRun) {
        if (current.opts.animationEffect && duration) {
          self.$refs.container.css("transition-duration", duration + "ms");
        }

        self.$refs.container.addClass("fancybox-is-open").trigger("focus");

        // Attempt to load content into slide
        // This will later call `afterLoad` -> `revealContent`
        self.loadSlide(current);

        self.preload("image");

        return;
      }

      // Get actual slide/stage positions (before cleaning up)
      slidePos = $.fancybox.getTranslate(previous.$slide);
      stagePos = $.fancybox.getTranslate(self.$refs.stage);

      // Clean up all slides
      $.each(self.slides, function(index, slide) {
        $.fancybox.stop(slide.$slide, true);
      });

      if (previous.pos !== current.pos) {
        previous.isComplete = false;
      }

      previous.$slide.removeClass("fancybox-slide--complete fancybox-slide--current");

      // If slides are out of place, then animate them to correct position
      if (isMoved) {
        // Calculate horizontal swipe distance
        diff = slidePos.left - (previous.pos * slidePos.width + previous.pos * previous.opts.gutter);

        $.each(self.slides, function(index, slide) {
          slide.$slide.removeClass("fancybox-animated").removeClass(function(index, className) {
            return (className.match(/(^|\s)fancybox-fx-\S+/g) || []).join(" ");
          });

          // Make sure that each slide is in equal distance
          // This is mostly needed for freshly added slides, because they are not yet positioned
          var leftPos = slide.pos * slidePos.width + slide.pos * slide.opts.gutter;

          $.fancybox.setTranslate(slide.$slide, {top: 0, left: leftPos - stagePos.left + diff});

          if (slide.pos !== current.pos) {
            slide.$slide.addClass("fancybox-slide--" + (slide.pos > current.pos ? "next" : "previous"));
          }

          // Redraw to make sure that transition will start
          forceRedraw(slide.$slide);

          // Animate the slide
          $.fancybox.animate(
            slide.$slide,
            {
              top: 0,
              left: (slide.pos - current.pos) * slidePos.width + (slide.pos - current.pos) * slide.opts.gutter
            },
            duration,
            function() {
              slide.$slide
                .css({
                  transform: "",
                  opacity: ""
                })
                .removeClass("fancybox-slide--next fancybox-slide--previous");

              if (slide.pos === self.currPos) {
                self.complete();
              }
            }
          );
        });
      } else if (duration && current.opts.transitionEffect) {
        // Set transition effect for previously active slide
        prop = "fancybox-animated fancybox-fx-" + current.opts.transitionEffect;

        previous.$slide.addClass("fancybox-slide--" + (previous.pos > current.pos ? "next" : "previous"));

        $.fancybox.animate(
          previous.$slide,
          prop,
          duration,
          function() {
            previous.$slide.removeClass(prop).removeClass("fancybox-slide--next fancybox-slide--previous");
          },
          false
        );
      }

      if (current.isLoaded) {
        self.revealContent(current);
      } else {
        self.loadSlide(current);
      }

      self.preload("image");
    },

    // Create new "slide" element
    // These are gallery items  that are actually added to DOM
    // =======================================================

    createSlide: function(pos) {
      var self = this,
        $slide,
        index;

      index = pos % self.group.length;
      index = index < 0 ? self.group.length + index : index;

      if (!self.slides[pos] && self.group[index]) {
        $slide = $('<div class="fancybox-slide"></div>').appendTo(self.$refs.stage);

        self.slides[pos] = $.extend(true, {}, self.group[index], {
          pos: pos,
          $slide: $slide,
          isLoaded: false
        });

        self.updateSlide(self.slides[pos]);
      }

      return self.slides[pos];
    },

    // Scale image to the actual size of the image;
    // x and y values should be relative to the slide
    // ==============================================

    scaleToActual: function(x, y, duration) {
      var self = this,
        current = self.current,
        $content = current.$content,
        canvasWidth = $.fancybox.getTranslate(current.$slide).width,
        canvasHeight = $.fancybox.getTranslate(current.$slide).height,
        newImgWidth = current.width,
        newImgHeight = current.height,
        imgPos,
        posX,
        posY,
        scaleX,
        scaleY;

      if (self.isAnimating || self.isMoved() || !$content || !(current.type == "image" && current.isLoaded && !current.hasError)) {
        return;
      }

      self.isAnimating = true;

      $.fancybox.stop($content);

      x = x === undefined ? canvasWidth * 0.5 : x;
      y = y === undefined ? canvasHeight * 0.5 : y;

      imgPos = $.fancybox.getTranslate($content);

      imgPos.top -= $.fancybox.getTranslate(current.$slide).top;
      imgPos.left -= $.fancybox.getTranslate(current.$slide).left;

      scaleX = newImgWidth / imgPos.width;
      scaleY = newImgHeight / imgPos.height;

      // Get center position for original image
      posX = canvasWidth * 0.5 - newImgWidth * 0.5;
      posY = canvasHeight * 0.5 - newImgHeight * 0.5;

      // Make sure image does not move away from edges
      if (newImgWidth > canvasWidth) {
        posX = imgPos.left * scaleX - (x * scaleX - x);

        if (posX > 0) {
          posX = 0;
        }

        if (posX < canvasWidth - newImgWidth) {
          posX = canvasWidth - newImgWidth;
        }
      }

      if (newImgHeight > canvasHeight) {
        posY = imgPos.top * scaleY - (y * scaleY - y);

        if (posY > 0) {
          posY = 0;
        }

        if (posY < canvasHeight - newImgHeight) {
          posY = canvasHeight - newImgHeight;
        }
      }

      self.updateCursor(newImgWidth, newImgHeight);

      $.fancybox.animate(
        $content,
        {
          top: posY,
          left: posX,
          scaleX: scaleX,
          scaleY: scaleY
        },
        duration || 366,
        function() {
          self.isAnimating = false;
        }
      );

      // Stop slideshow
      if (self.SlideShow && self.SlideShow.isActive) {
        self.SlideShow.stop();
      }
    },

    // Scale image to fit inside parent element
    // ========================================

    scaleToFit: function(duration) {
      var self = this,
        current = self.current,
        $content = current.$content,
        end;

      if (self.isAnimating || self.isMoved() || !$content || !(current.type == "image" && current.isLoaded && !current.hasError)) {
        return;
      }

      self.isAnimating = true;

      $.fancybox.stop($content);

      end = self.getFitPos(current);

      self.updateCursor(end.width, end.height);

      $.fancybox.animate(
        $content,
        {
          top: end.top,
          left: end.left,
          scaleX: end.width / $content.width(),
          scaleY: end.height / $content.height()
        },
        duration || 366,
        function() {
          self.isAnimating = false;
        }
      );
    },

    // Calculate image size to fit inside viewport
    // ===========================================

    getFitPos: function(slide) {
      var self = this,
        $content = slide.$content,
        $slide = slide.$slide,
        width = slide.width || slide.opts.width,
        height = slide.height || slide.opts.height,
        maxWidth,
        maxHeight,
        minRatio,
        aspectRatio,
        rez = {};

      if (!slide.isLoaded || !$content || !$content.length) {
        return false;
      }

      maxWidth = $.fancybox.getTranslate(self.$refs.stage).width;
      maxHeight = $.fancybox.getTranslate(self.$refs.stage).height;

      maxWidth -=
        parseFloat($slide.css("paddingLeft")) +
        parseFloat($slide.css("paddingRight")) +
        parseFloat($content.css("marginLeft")) +
        parseFloat($content.css("marginRight"));

      maxHeight -=
        parseFloat($slide.css("paddingTop")) +
        parseFloat($slide.css("paddingBottom")) +
        parseFloat($content.css("marginTop")) +
        parseFloat($content.css("marginBottom"));

      if (!width || !height) {
        width = maxWidth;
        height = maxHeight;
      }

      minRatio = Math.min(1, maxWidth / width, maxHeight / height);

      width = minRatio * width;
      height = minRatio * height;

      // Adjust width/height to precisely fit into container
      if (width > maxWidth - 0.5) {
        width = maxWidth;
      }

      if (height > maxHeight - 0.5) {
        height = maxHeight;
      }

      if (slide.type === "image") {
        rez.top = Math.floor((maxHeight - height) * 0.5) + parseFloat($slide.css("paddingTop"));
        rez.left = Math.floor((maxWidth - width) * 0.5) + parseFloat($slide.css("paddingLeft"));
      } else if (slide.contentType === "video") {
        // Force aspect ratio for the video
        // "I say the whole world must learn of our peaceful ways… by force!"
        aspectRatio = slide.opts.width && slide.opts.height ? width / height : slide.opts.ratio || 16 / 9;

        if (height > width / aspectRatio) {
          height = width / aspectRatio;
        } else if (width > height * aspectRatio) {
          width = height * aspectRatio;
        }
      }

      rez.width = width;
      rez.height = height;

      return rez;
    },

    // Update content size and position for all slides
    // ==============================================

    update: function(e) {
      var self = this;

      $.each(self.slides, function(key, slide) {
        self.updateSlide(slide, e);
      });
    },

    // Update slide content position and size
    // ======================================

    updateSlide: function(slide, e) {
      var self = this,
        $content = slide && slide.$content,
        width = slide.width || slide.opts.width,
        height = slide.height || slide.opts.height,
        $slide = slide.$slide;

      // First, prevent caption overlap, if needed
      self.adjustCaption(slide);

      // Then resize content to fit inside the slide
      if ($content && (width || height || slide.contentType === "video") && !slide.hasError) {
        $.fancybox.stop($content);

        $.fancybox.setTranslate($content, self.getFitPos(slide));

        if (slide.pos === self.currPos) {
          self.isAnimating = false;

          self.updateCursor();
        }
      }

      // Then some adjustments
      self.adjustLayout(slide);

      if ($slide.length) {
        $slide.trigger("refresh");

        if (slide.pos === self.currPos) {
          self.$refs.toolbar
            .add(self.$refs.navigation.find(".fancybox-button--arrow_right"))
            .toggleClass("compensate-for-scrollbar", $slide.get(0).scrollHeight > $slide.get(0).clientHeight);
        }
      }

      self.trigger("onUpdate", slide, e);
    },

    // Horizontally center slide
    // =========================

    centerSlide: function(duration) {
      var self = this,
        current = self.current,
        $slide = current.$slide;

      if (self.isClosing || !current) {
        return;
      }

      $slide.siblings().css({
        transform: "",
        opacity: ""
      });

      $slide
        .parent()
        .children()
        .removeClass("fancybox-slide--previous fancybox-slide--next");

      $.fancybox.animate(
        $slide,
        {
          top: 0,
          left: 0,
          opacity: 1
        },
        duration === undefined ? 0 : duration,
        function() {
          // Clean up
          $slide.css({
            transform: "",
            opacity: ""
          });

          if (!current.isComplete) {
            self.complete();
          }
        },
        false
      );
    },

    // Check if current slide is moved (swiped)
    // ========================================

    isMoved: function(slide) {
      var current = slide || this.current,
        slidePos,
        stagePos;

      if (!current) {
        return false;
      }

      stagePos = $.fancybox.getTranslate(this.$refs.stage);
      slidePos = $.fancybox.getTranslate(current.$slide);

      return (
        !current.$slide.hasClass("fancybox-animated") &&
        (Math.abs(slidePos.top - stagePos.top) > 0.5 || Math.abs(slidePos.left - stagePos.left) > 0.5)
      );
    },

    // Update cursor style depending if content can be zoomed
    // ======================================================

    updateCursor: function(nextWidth, nextHeight) {
      var self = this,
        current = self.current,
        $container = self.$refs.container,
        canPan,
        isZoomable;

      if (!current || self.isClosing || !self.Guestures) {
        return;
      }

      $container.removeClass("fancybox-is-zoomable fancybox-can-zoomIn fancybox-can-zoomOut fancybox-can-swipe fancybox-can-pan");

      canPan = self.canPan(nextWidth, nextHeight);

      isZoomable = canPan ? true : self.isZoomable();

      $container.toggleClass("fancybox-is-zoomable", isZoomable);

      $("[data-fancybox-zoom]").prop("disabled", !isZoomable);

      if (canPan) {
        $container.addClass("fancybox-can-pan");
      } else if (
        isZoomable &&
        (current.opts.clickContent === "zoom" || ($.isFunction(current.opts.clickContent) && current.opts.clickContent(current) == "zoom"))
      ) {
        $container.addClass("fancybox-can-zoomIn");
      } else if (current.opts.touch && (current.opts.touch.vertical || self.group.length > 1) && current.contentType !== "video") {
        $container.addClass("fancybox-can-swipe");
      }
    },

    // Check if current slide is zoomable
    // ==================================

    isZoomable: function() {
      var self = this,
        current = self.current,
        fitPos;

      // Assume that slide is zoomable if:
      //   - image is still loading
      //   - actual size of the image is smaller than available area
      if (current && !self.isClosing && current.type === "image" && !current.hasError) {
        if (!current.isLoaded) {
          return true;
        }

        fitPos = self.getFitPos(current);

        if (fitPos && (current.width > fitPos.width || current.height > fitPos.height)) {
          return true;
        }
      }

      return false;
    },

    // Check if current image dimensions are smaller than actual
    // =========================================================

    isScaledDown: function(nextWidth, nextHeight) {
      var self = this,
        rez = false,
        current = self.current,
        $content = current.$content;

      if (nextWidth !== undefined && nextHeight !== undefined) {
        rez = nextWidth < current.width && nextHeight < current.height;
      } else if ($content) {
        rez = $.fancybox.getTranslate($content);
        rez = rez.width < current.width && rez.height < current.height;
      }

      return rez;
    },

    // Check if image dimensions exceed parent element
    // ===============================================

    canPan: function(nextWidth, nextHeight) {
      var self = this,
        current = self.current,
        pos = null,
        rez = false;

      if (current.type === "image" && (current.isComplete || (nextWidth && nextHeight)) && !current.hasError) {
        rez = self.getFitPos(current);

        if (nextWidth !== undefined && nextHeight !== undefined) {
          pos = {width: nextWidth, height: nextHeight};
        } else if (current.isComplete) {
          pos = $.fancybox.getTranslate(current.$content);
        }

        if (pos && rez) {
          rez = Math.abs(pos.width - rez.width) > 1.5 || Math.abs(pos.height - rez.height) > 1.5;
        }
      }

      return rez;
    },

    // Load content into the slide
    // ===========================

    loadSlide: function(slide) {
      var self = this,
        type,
        $slide,
        ajaxLoad;

      if (slide.isLoading || slide.isLoaded) {
        return;
      }

      slide.isLoading = true;

      if (self.trigger("beforeLoad", slide) === false) {
        slide.isLoading = false;

        return false;
      }

      type = slide.type;
      $slide = slide.$slide;

      $slide
        .off("refresh")
        .trigger("onReset")
        .addClass(slide.opts.slideClass);

      // Create content depending on the type
      switch (type) {
        case "image":
          self.setImage(slide);

          break;

        case "iframe":
          self.setIframe(slide);

          break;

        case "html":
          self.setContent(slide, slide.src || slide.content);

          break;

        case "video":
          self.setContent(
            slide,
            slide.opts.video.tpl
              .replace(/\{\{src\}\}/gi, slide.src)
              .replace("{{format}}", slide.opts.videoFormat || slide.opts.video.format || "")
              .replace("{{poster}}", slide.thumb || "")
          );

          break;

        case "inline":
          if ($(slide.src).length) {
            self.setContent(slide, $(slide.src));
          } else {
            self.setError(slide);
          }

          break;

        case "ajax":
          self.showLoading(slide);

          ajaxLoad = $.ajax(
            $.extend({}, slide.opts.ajax.settings, {
              url: slide.src,
              success: function(data, textStatus) {
                if (textStatus === "success") {
                  self.setContent(slide, data);
                }
              },
              error: function(jqXHR, textStatus) {
                if (jqXHR && textStatus !== "abort") {
                  self.setError(slide);
                }
              }
            })
          );

          $slide.one("onReset", function() {
            ajaxLoad.abort();
          });

          break;

        default:
          self.setError(slide);

          break;
      }

      return true;
    },

    // Use thumbnail image, if possible
    // ================================

    setImage: function(slide) {
      var self = this,
        ghost;

      // Check if need to show loading icon
      setTimeout(function() {
        var $img = slide.$image;

        if (!self.isClosing && slide.isLoading && (!$img || !$img.length || !$img[0].complete) && !slide.hasError) {
          self.showLoading(slide);
        }
      }, 50);

      //Check if image has srcset
      self.checkSrcset(slide);

      // This will be wrapper containing both ghost and actual image
      slide.$content = $('<div class="fancybox-content"></div>')
        .addClass("fancybox-is-hidden")
        .appendTo(slide.$slide.addClass("fancybox-slide--image"));

      // If we have a thumbnail, we can display it while actual image is loading
      // Users will not stare at black screen and actual image will appear gradually
      if (slide.opts.preload !== false && slide.opts.width && slide.opts.height && slide.thumb) {
        slide.width = slide.opts.width;
        slide.height = slide.opts.height;

        ghost = document.createElement("img");

        ghost.onerror = function() {
          $(this).remove();

          slide.$ghost = null;
        };

        ghost.onload = function() {
          self.afterLoad(slide);
        };

        slide.$ghost = $(ghost)
          .addClass("fancybox-image")
          .appendTo(slide.$content)
          .attr("src", slide.thumb);
      }

      // Start loading actual image
      self.setBigImage(slide);
    },

    // Check if image has srcset and get the source
    // ============================================
    checkSrcset: function(slide) {
      var srcset = slide.opts.srcset || slide.opts.image.srcset,
        found,
        temp,
        pxRatio,
        windowWidth;

      // If we have "srcset", then we need to find first matching "src" value.
      // This is necessary, because when you set an src attribute, the browser will preload the image
      // before any javascript or even CSS is applied.
      if (srcset) {
        pxRatio = window.devicePixelRatio || 1;
        windowWidth = window.innerWidth * pxRatio;

        temp = srcset.split(",").map(function(el) {
          var ret = {};

          el.trim()
            .split(/\s+/)
            .forEach(function(el, i) {
              var value = parseInt(el.substring(0, el.length - 1), 10);

              if (i === 0) {
                return (ret.url = el);
              }

              if (value) {
                ret.value = value;
                ret.postfix = el[el.length - 1];
              }
            });

          return ret;
        });

        // Sort by value
        temp.sort(function(a, b) {
          return a.value - b.value;
        });

        // Ok, now we have an array of all srcset values
        for (var j = 0; j < temp.length; j++) {
          var el = temp[j];

          if ((el.postfix === "w" && el.value >= windowWidth) || (el.postfix === "x" && el.value >= pxRatio)) {
            found = el;
            break;
          }
        }

        // If not found, take the last one
        if (!found && temp.length) {
          found = temp[temp.length - 1];
        }

        if (found) {
          slide.src = found.url;

          // If we have default width/height values, we can calculate height for matching source
          if (slide.width && slide.height && found.postfix == "w") {
            slide.height = (slide.width / slide.height) * found.value;
            slide.width = found.value;
          }

          slide.opts.srcset = srcset;
        }
      }
    },

    // Create full-size image
    // ======================

    setBigImage: function(slide) {
      var self = this,
        img = document.createElement("img"),
        $img = $(img);

      slide.$image = $img
        .one("error", function() {
          self.setError(slide);
        })
        .one("load", function() {
          var sizes;

          if (!slide.$ghost) {
            self.resolveImageSlideSize(slide, this.naturalWidth, this.naturalHeight);

            self.afterLoad(slide);
          }

          if (self.isClosing) {
            return;
          }

          if (slide.opts.srcset) {
            sizes = slide.opts.sizes;

            if (!sizes || sizes === "auto") {
              sizes =
                (slide.width / slide.height > 1 && $W.width() / $W.height() > 1 ? "100" : Math.round((slide.width / slide.height) * 100)) +
                "vw";
            }

            $img.attr("sizes", sizes).attr("srcset", slide.opts.srcset);
          }

          // Hide temporary image after some delay
          if (slide.$ghost) {
            setTimeout(function() {
              if (slide.$ghost && !self.isClosing) {
                slide.$ghost.hide();
              }
            }, Math.min(300, Math.max(1000, slide.height / 1600)));
          }

          self.hideLoading(slide);
        })
        .addClass("fancybox-image")
        .attr("src", slide.src)
        .appendTo(slide.$content);

      if ((img.complete || img.readyState == "complete") && $img.naturalWidth && $img.naturalHeight) {
        $img.trigger("load");
      } else if (img.error) {
        $img.trigger("error");
      }
    },

    // Computes the slide size from image size and maxWidth/maxHeight
    // ==============================================================

    resolveImageSlideSize: function(slide, imgWidth, imgHeight) {
      var maxWidth = parseInt(slide.opts.width, 10),
        maxHeight = parseInt(slide.opts.height, 10);

      // Sets the default values from the image
      slide.width = imgWidth;
      slide.height = imgHeight;

      if (maxWidth > 0) {
        slide.width = maxWidth;
        slide.height = Math.floor((maxWidth * imgHeight) / imgWidth);
      }

      if (maxHeight > 0) {
        slide.width = Math.floor((maxHeight * imgWidth) / imgHeight);
        slide.height = maxHeight;
      }
    },

    // Create iframe wrapper, iframe and bindings
    // ==========================================

    setIframe: function(slide) {
      var self = this,
        opts = slide.opts.iframe,
        $slide = slide.$slide,
        $iframe;

      slide.$content = $('<div class="fancybox-content' + (opts.preload ? " fancybox-is-hidden" : "") + '"></div>')
        .css(opts.css)
        .appendTo($slide);

      $slide.addClass("fancybox-slide--" + slide.contentType);

      slide.$iframe = $iframe = $(opts.tpl.replace(/\{rnd\}/g, new Date().getTime()))
        .attr(opts.attr)
        .appendTo(slide.$content);

      if (opts.preload) {
        self.showLoading(slide);

        // Unfortunately, it is not always possible to determine if iframe is successfully loaded
        // (due to browser security policy)

        $iframe.on("load.fb error.fb", function(e) {
          this.isReady = 1;

          slide.$slide.trigger("refresh");

          self.afterLoad(slide);
        });

        // Recalculate iframe content size
        // ===============================

        $slide.on("refresh.fb", function() {
          var $content = slide.$content,
            frameWidth = opts.css.width,
            frameHeight = opts.css.height,
            $contents,
            $body;

          if ($iframe[0].isReady !== 1) {
            return;
          }

          try {
            $contents = $iframe.contents();
            $body = $contents.find("body");
          } catch (ignore) {}

          // Calculate content dimensions, if it is accessible
          if ($body && $body.length && $body.children().length) {
            // Avoid scrolling to top (if multiple instances)
            $slide.css("overflow", "visible");

            $content.css({
              width: "100%",
              "max-width": "100%",
              height: "9999px"
            });

            if (frameWidth === undefined) {
              frameWidth = Math.ceil(Math.max($body[0].clientWidth, $body.outerWidth(true)));
            }

            $content.css("width", frameWidth ? frameWidth : "").css("max-width", "");

            if (frameHeight === undefined) {
              frameHeight = Math.ceil(Math.max($body[0].clientHeight, $body.outerHeight(true)));
            }

            $content.css("height", frameHeight ? frameHeight : "");

            $slide.css("overflow", "auto");
          }

          $content.removeClass("fancybox-is-hidden");
        });
      } else {
        self.afterLoad(slide);
      }

      $iframe.attr("src", slide.src);

      // Remove iframe if closing or changing gallery item
      $slide.one("onReset", function() {
        // This helps IE not to throw errors when closing
        try {
          $(this)
            .find("iframe")
            .hide()
            .unbind()
            .attr("src", "//about:blank");
        } catch (ignore) {}

        $(this)
          .off("refresh.fb")
          .empty();

        slide.isLoaded = false;
        slide.isRevealed = false;
      });
    },

    // Wrap and append content to the slide
    // ======================================

    setContent: function(slide, content) {
      var self = this;

      if (self.isClosing) {
        return;
      }

      self.hideLoading(slide);

      if (slide.$content) {
        $.fancybox.stop(slide.$content);
      }

      slide.$slide.empty();

      // If content is a jQuery object, then it will be moved to the slide.
      // The placeholder is created so we will know where to put it back.
      if (isQuery(content) && content.parent().length) {
        // Make sure content is not already moved to fancyBox
        if (content.hasClass("fancybox-content") || content.parent().hasClass("fancybox-content")) {
          content.parents(".fancybox-slide").trigger("onReset");
        }

        // Create temporary element marking original place of the content
        slide.$placeholder = $("<div>")
          .hide()
          .insertAfter(content);

        // Make sure content is visible
        content.css("display", "inline-block");
      } else if (!slide.hasError) {
        // If content is just a plain text, try to convert it to html
        if ($.type(content) === "string") {
          content = $("<div>")
            .append($.trim(content))
            .contents();
        }

        // If "filter" option is provided, then filter content
        if (slide.opts.filter) {
          content = $("<div>")
            .html(content)
            .find(slide.opts.filter);
        }
      }

      slide.$slide.one("onReset", function() {
        // Pause all html5 video/audio
        $(this)
          .find("video,audio")
          .trigger("pause");

        // Put content back
        if (slide.$placeholder) {
          slide.$placeholder.after(content.removeClass("fancybox-content").hide()).remove();

          slide.$placeholder = null;
        }

        // Remove custom close button
        if (slide.$smallBtn) {
          slide.$smallBtn.remove();

          slide.$smallBtn = null;
        }

        // Remove content and mark slide as not loaded
        if (!slide.hasError) {
          $(this).empty();

          slide.isLoaded = false;
          slide.isRevealed = false;
        }
      });

      $(content).appendTo(slide.$slide);

      if ($(content).is("video,audio")) {
        $(content).addClass("fancybox-video");

        $(content).wrap("<div></div>");

        slide.contentType = "video";

        slide.opts.width = slide.opts.width || $(content).attr("width");
        slide.opts.height = slide.opts.height || $(content).attr("height");
      }

      slide.$content = slide.$slide
        .children()
        .filter("div,form,main,video,audio,article,.fancybox-content")
        .first();

      slide.$content.siblings().hide();

      // Re-check if there is a valid content
      // (in some cases, ajax response can contain various elements or plain text)
      if (!slide.$content.length) {
        slide.$content = slide.$slide
          .wrapInner("<div></div>")
          .children()
          .first();
      }

      slide.$content.addClass("fancybox-content");

      slide.$slide.addClass("fancybox-slide--" + slide.contentType);

      self.afterLoad(slide);
    },

    // Display error message
    // =====================

    setError: function(slide) {
      slide.hasError = true;

      slide.$slide
        .trigger("onReset")
        .removeClass("fancybox-slide--" + slide.contentType)
        .addClass("fancybox-slide--error");

      slide.contentType = "html";

      this.setContent(slide, this.translate(slide, slide.opts.errorTpl));

      if (slide.pos === this.currPos) {
        this.isAnimating = false;
      }
    },

    // Show loading icon inside the slide
    // ==================================

    showLoading: function(slide) {
      var self = this;

      slide = slide || self.current;

      if (slide && !slide.$spinner) {
        slide.$spinner = $(self.translate(self, self.opts.spinnerTpl))
          .appendTo(slide.$slide)
          .hide()
          .fadeIn("fast");
      }
    },

    // Remove loading icon from the slide
    // ==================================

    hideLoading: function(slide) {
      var self = this;

      slide = slide || self.current;

      if (slide && slide.$spinner) {
        slide.$spinner.stop().remove();

        delete slide.$spinner;
      }
    },

    // Adjustments after slide content has been loaded
    // ===============================================

    afterLoad: function(slide) {
      var self = this;

      if (self.isClosing) {
        return;
      }

      slide.isLoading = false;
      slide.isLoaded = true;

      self.trigger("afterLoad", slide);

      self.hideLoading(slide);

      // Add small close button
      if (slide.opts.smallBtn && (!slide.$smallBtn || !slide.$smallBtn.length)) {
        slide.$smallBtn = $(self.translate(slide, slide.opts.btnTpl.smallBtn)).appendTo(slide.$content);
      }

      // Disable right click
      if (slide.opts.protect && slide.$content && !slide.hasError) {
        slide.$content.on("contextmenu.fb", function(e) {
          if (e.button == 2) {
            e.preventDefault();
          }

          return true;
        });

        // Add fake element on top of the image
        // This makes a bit harder for user to select image
        if (slide.type === "image") {
          $('<div class="fancybox-spaceball"></div>').appendTo(slide.$content);
        }
      }

      self.adjustCaption(slide);

      self.adjustLayout(slide);

      if (slide.pos === self.currPos) {
        self.updateCursor();
      }

      self.revealContent(slide);
    },

    // Prevent caption overlap,
    // fix css inconsistency across browsers
    // =====================================

    adjustCaption: function(slide) {
      var self = this,
        current = slide || self.current,
        caption = current.opts.caption,
        preventOverlap = current.opts.preventCaptionOverlap,
        $caption = self.$refs.caption,
        $clone,
        captionH = false;

      $caption.toggleClass("fancybox-caption--separate", preventOverlap);

      if (preventOverlap && caption && caption.length) {
        if (current.pos !== self.currPos) {
          $clone = $caption.clone().appendTo($caption.parent());

          $clone
            .children()
            .eq(0)
            .empty()
            .html(caption);

          captionH = $clone.outerHeight(true);

          $clone.empty().remove();
        } else if (self.$caption) {
          captionH = self.$caption.outerHeight(true);
        }

        current.$slide.css("padding-bottom", captionH || "");
      }
    },

    // Simple hack to fix inconsistency across browsers, described here (affects Edge, too):
    // https://bugzilla.mozilla.org/show_bug.cgi?id=748518
    // ====================================================================================

    adjustLayout: function(slide) {
      var self = this,
        current = slide || self.current,
        scrollHeight,
        marginBottom,
        inlinePadding,
        actualPadding;

      if (current.isLoaded && current.opts.disableLayoutFix !== true) {
        current.$content.css("margin-bottom", "");

        // If we would always set margin-bottom for the content,
        // then it would potentially break vertical align
        if (current.$content.outerHeight() > current.$slide.height() + 0.5) {
          inlinePadding = current.$slide[0].style["padding-bottom"];
          actualPadding = current.$slide.css("padding-bottom");

          if (parseFloat(actualPadding) > 0) {
            scrollHeight = current.$slide[0].scrollHeight;

            current.$slide.css("padding-bottom", 0);

            if (Math.abs(scrollHeight - current.$slide[0].scrollHeight) < 1) {
              marginBottom = actualPadding;
            }

            current.$slide.css("padding-bottom", inlinePadding);
          }
        }

        current.$content.css("margin-bottom", marginBottom);
      }
    },

    // Make content visible
    // This method is called right after content has been loaded or
    // user navigates gallery and transition should start
    // ============================================================

    revealContent: function(slide) {
      var self = this,
        $slide = slide.$slide,
        end = false,
        start = false,
        isMoved = self.isMoved(slide),
        isRevealed = slide.isRevealed,
        effect,
        effectClassName,
        duration,
        opacity;

      slide.isRevealed = true;

      effect = slide.opts[self.firstRun ? "animationEffect" : "transitionEffect"];
      duration = slide.opts[self.firstRun ? "animationDuration" : "transitionDuration"];

      duration = parseInt(slide.forcedDuration === undefined ? duration : slide.forcedDuration, 10);

      if (isMoved || slide.pos !== self.currPos || !duration) {
        effect = false;
      }

      // Check if can zoom
      if (effect === "zoom") {
        if (slide.pos === self.currPos && duration && slide.type === "image" && !slide.hasError && (start = self.getThumbPos(slide))) {
          end = self.getFitPos(slide);
        } else {
          effect = "fade";
        }
      }

      // Zoom animation
      // ==============
      if (effect === "zoom") {
        self.isAnimating = true;

        end.scaleX = end.width / start.width;
        end.scaleY = end.height / start.height;

        // Check if we need to animate opacity
        opacity = slide.opts.zoomOpacity;

        if (opacity == "auto") {
          opacity = Math.abs(slide.width / slide.height - start.width / start.height) > 0.1;
        }

        if (opacity) {
          start.opacity = 0.1;
          end.opacity = 1;
        }

        // Draw image at start position
        $.fancybox.setTranslate(slide.$content.removeClass("fancybox-is-hidden"), start);

        forceRedraw(slide.$content);

        // Start animation
        $.fancybox.animate(slide.$content, end, duration, function() {
          self.isAnimating = false;

          self.complete();
        });

        return;
      }

      self.updateSlide(slide);

      // Simply show content if no effect
      // ================================
      if (!effect) {
        slide.$content.removeClass("fancybox-is-hidden");

        if (!isRevealed && isMoved && slide.type === "image" && !slide.hasError) {
          slide.$content.hide().fadeIn("fast");
        }

        if (slide.pos === self.currPos) {
          self.complete();
        }

        return;
      }

      // Prepare for CSS transiton
      // =========================
      $.fancybox.stop($slide);

      //effectClassName = "fancybox-animated fancybox-slide--" + (slide.pos >= self.prevPos ? "next" : "previous") + " fancybox-fx-" + effect;
      effectClassName = "fancybox-slide--" + (slide.pos >= self.prevPos ? "next" : "previous") + " fancybox-animated fancybox-fx-" + effect;

      $slide.addClass(effectClassName).removeClass("fancybox-slide--current"); //.addClass(effectClassName);

      slide.$content.removeClass("fancybox-is-hidden");

      // Force reflow
      forceRedraw($slide);

      if (slide.type !== "image") {
        slide.$content.hide().show(0);
      }

      $.fancybox.animate(
        $slide,
        "fancybox-slide--current",
        duration,
        function() {
          $slide.removeClass(effectClassName).css({
            transform: "",
            opacity: ""
          });

          if (slide.pos === self.currPos) {
            self.complete();
          }
        },
        true
      );
    },

    // Check if we can and have to zoom from thumbnail
    //================================================

    getThumbPos: function(slide) {
      var rez = false,
        $thumb = slide.$thumb,
        thumbPos,
        btw,
        brw,
        bbw,
        blw;

      if (!$thumb || !inViewport($thumb[0])) {
        return false;
      }

      thumbPos = $.fancybox.getTranslate($thumb);

      btw = parseFloat($thumb.css("border-top-width") || 0);
      brw = parseFloat($thumb.css("border-right-width") || 0);
      bbw = parseFloat($thumb.css("border-bottom-width") || 0);
      blw = parseFloat($thumb.css("border-left-width") || 0);

      rez = {
        top: thumbPos.top + btw,
        left: thumbPos.left + blw,
        width: thumbPos.width - brw - blw,
        height: thumbPos.height - btw - bbw,
        scaleX: 1,
        scaleY: 1
      };

      return thumbPos.width > 0 && thumbPos.height > 0 ? rez : false;
    },

    // Final adjustments after current gallery item is moved to position
    // and it`s content is loaded
    // ==================================================================

    complete: function() {
      var self = this,
        current = self.current,
        slides = {},
        $el;

      if (self.isMoved() || !current.isLoaded) {
        return;
      }

      if (!current.isComplete) {
        current.isComplete = true;

        current.$slide.siblings().trigger("onReset");

        self.preload("inline");

        // Trigger any CSS transiton inside the slide
        forceRedraw(current.$slide);

        current.$slide.addClass("fancybox-slide--complete");

        // Remove unnecessary slides
        $.each(self.slides, function(key, slide) {
          if (slide.pos >= self.currPos - 1 && slide.pos <= self.currPos + 1) {
            slides[slide.pos] = slide;
          } else if (slide) {
            $.fancybox.stop(slide.$slide);

            slide.$slide.off().remove();
          }
        });

        self.slides = slides;
      }

      self.isAnimating = false;

      self.updateCursor();

      self.trigger("afterShow");

      // Autoplay first html5 video/audio
      if (!!current.opts.video.autoStart) {
        current.$slide
          .find("video,audio")
          .filter(":visible:first")
          .trigger("play")
          .one("ended", function() {
            if (this.webkitExitFullscreen) {
              this.webkitExitFullscreen();
            }

            self.next();
          });
      }

      // Try to focus on the first focusable element
      if (current.opts.autoFocus && current.contentType === "html") {
        // Look for the first input with autofocus attribute
        $el = current.$content.find("input[autofocus]:enabled:visible:first");

        if ($el.length) {
          $el.trigger("focus");
        } else {
          self.focus(null, true);
        }
      }

      // Avoid jumping
      current.$slide.scrollTop(0).scrollLeft(0);
    },

    // Preload next and previous slides
    // ================================

    preload: function(type) {
      var self = this,
        prev,
        next;

      if (self.group.length < 2) {
        return;
      }

      next = self.slides[self.currPos + 1];
      prev = self.slides[self.currPos - 1];

      if (prev && prev.type === type) {
        self.loadSlide(prev);
      }

      if (next && next.type === type) {
        self.loadSlide(next);
      }
    },

    // Try to find and focus on the first focusable element
    // ====================================================

    focus: function(e, firstRun) {
      var self = this,
        focusableStr = [
          "a[href]",
          "area[href]",
          'input:not([disabled]):not([type="hidden"]):not([aria-hidden])',
          "select:not([disabled]):not([aria-hidden])",
          "textarea:not([disabled]):not([aria-hidden])",
          "button:not([disabled]):not([aria-hidden])",
          "iframe",
          "object",
          "embed",
          "video",
          "audio",
          "[contenteditable]",
          '[tabindex]:not([tabindex^="-"])'
        ].join(","),
        focusableItems,
        focusedItemIndex;

      if (self.isClosing) {
        return;
      }

      if (e || !self.current || !self.current.isComplete) {
        // Focus on any element inside fancybox
        focusableItems = self.$refs.container.find("*:visible");
      } else {
        // Focus inside current slide
        focusableItems = self.current.$slide.find("*:visible" + (firstRun ? ":not(.fancybox-close-small)" : ""));
      }

      focusableItems = focusableItems.filter(focusableStr).filter(function() {
        return $(this).css("visibility") !== "hidden" && !$(this).hasClass("disabled");
      });

      if (focusableItems.length) {
        focusedItemIndex = focusableItems.index(document.activeElement);

        if (e && e.shiftKey) {
          // Back tab
          if (focusedItemIndex < 0 || focusedItemIndex == 0) {
            e.preventDefault();

            focusableItems.eq(focusableItems.length - 1).trigger("focus");
          }
        } else {
          // Outside or Forward tab
          if (focusedItemIndex < 0 || focusedItemIndex == focusableItems.length - 1) {
            if (e) {
              e.preventDefault();
            }

            focusableItems.eq(0).trigger("focus");
          }
        }
      } else {
        self.$refs.container.trigger("focus");
      }
    },

    // Activates current instance - brings container to the front and enables keyboard,
    // notifies other instances about deactivating
    // =================================================================================

    activate: function() {
      var self = this;

      // Deactivate all instances
      $(".fancybox-container").each(function() {
        var instance = $(this).data("FancyBox");

        // Skip self and closing instances
        if (instance && instance.id !== self.id && !instance.isClosing) {
          instance.trigger("onDeactivate");

          instance.removeEvents();

          instance.isVisible = false;
        }
      });

      self.isVisible = true;

      if (self.current || self.isIdle) {
        self.update();

        self.updateControls();
      }

      self.trigger("onActivate");

      self.addEvents();
    },

    // Start closing procedure
    // This will start "zoom-out" animation if needed and clean everything up afterwards
    // =================================================================================

    close: function(e, d) {
      var self = this,
        current = self.current,
        effect,
        duration,
        $content,
        domRect,
        opacity,
        start,
        end;

      var done = function() {
        self.cleanUp(e);
      };

      if (self.isClosing) {
        return false;
      }

      self.isClosing = true;

      // If beforeClose callback prevents closing, make sure content is centered
      if (self.trigger("beforeClose", e) === false) {
        self.isClosing = false;

        requestAFrame(function() {
          self.update();
        });

        return false;
      }

      // Remove all events
      // If there are multiple instances, they will be set again by "activate" method
      self.removeEvents();

      $content = current.$content;
      effect = current.opts.animationEffect;
      duration = $.isNumeric(d) ? d : effect ? current.opts.animationDuration : 0;

      current.$slide.removeClass("fancybox-slide--complete fancybox-slide--next fancybox-slide--previous fancybox-animated");

      if (e !== true) {
        $.fancybox.stop(current.$slide);
      } else {
        effect = false;
      }

      // Remove other slides
      current.$slide
        .siblings()
        .trigger("onReset")
        .remove();

      // Trigger animations
      if (duration) {
        self.$refs.container
          .removeClass("fancybox-is-open")
          .addClass("fancybox-is-closing")
          .css("transition-duration", duration + "ms");
      }

      // Clean up
      self.hideLoading(current);

      self.hideControls(true);

      self.updateCursor();

      // Check if possible to zoom-out
      if (
        effect === "zoom" &&
        !($content && duration && current.type === "image" && !self.isMoved() && !current.hasError && (end = self.getThumbPos(current)))
      ) {
        effect = "fade";
      }

      if (effect === "zoom") {
        $.fancybox.stop($content);

        domRect = $.fancybox.getTranslate($content);

        start = {
          top: domRect.top,
          left: domRect.left,
          scaleX: domRect.width / end.width,
          scaleY: domRect.height / end.height,
          width: end.width,
          height: end.height
        };

        // Check if we need to animate opacity
        opacity = current.opts.zoomOpacity;

        if (opacity == "auto") {
          opacity = Math.abs(current.width / current.height - end.width / end.height) > 0.1;
        }

        if (opacity) {
          end.opacity = 0;
        }

        $.fancybox.setTranslate($content, start);

        forceRedraw($content);

        $.fancybox.animate($content, end, duration, done);

        return true;
      }

      if (effect && duration) {
        $.fancybox.animate(
          current.$slide.addClass("fancybox-slide--previous").removeClass("fancybox-slide--current"),
          "fancybox-animated fancybox-fx-" + effect,
          duration,
          done
        );
      } else {
        // If skip animation
        if (e === true) {
          setTimeout(done, duration);
        } else {
          done();
        }
      }

      return true;
    },

    // Final adjustments after removing the instance
    // =============================================

    cleanUp: function(e) {
      var self = this,
        instance,
        $focus = self.current.opts.$orig,
        x,
        y;

      self.current.$slide.trigger("onReset");

      self.$refs.container.empty().remove();

      self.trigger("afterClose", e);

      // Place back focus
      if (!!self.current.opts.backFocus) {
        if (!$focus || !$focus.length || !$focus.is(":visible")) {
          $focus = self.$trigger;
        }

        if ($focus && $focus.length) {
          x = window.scrollX;
          y = window.scrollY;

          $focus.trigger("focus");

          $("html, body")
            .scrollTop(y)
            .scrollLeft(x);
        }
      }

      self.current = null;

      // Check if there are other instances
      instance = $.fancybox.getInstance();

      if (instance) {
        instance.activate();
      } else {
        $("body").removeClass("fancybox-active compensate-for-scrollbar");

        $("#fancybox-style-noscroll").remove();
      }
    },

    // Call callback and trigger an event
    // ==================================

    trigger: function(name, slide) {
      var args = Array.prototype.slice.call(arguments, 1),
        self = this,
        obj = slide && slide.opts ? slide : self.current,
        rez;

      if (obj) {
        args.unshift(obj);
      } else {
        obj = self;
      }

      args.unshift(self);

      if ($.isFunction(obj.opts[name])) {
        rez = obj.opts[name].apply(obj, args);
      }

      if (rez === false) {
        return rez;
      }

      if (name === "afterClose" || !self.$refs) {
        $D.trigger(name + ".fb", args);
      } else {
        self.$refs.container.trigger(name + ".fb", args);
      }
    },

    // Update infobar values, navigation button states and reveal caption
    // ==================================================================

    updateControls: function() {
      var self = this,
        current = self.current,
        index = current.index,
        $container = self.$refs.container,
        $caption = self.$refs.caption,
        caption = current.opts.caption;

      // Recalculate content dimensions
      current.$slide.trigger("refresh");

      // Set caption
      if (caption && caption.length) {
        self.$caption = $caption;

        $caption
          .children()
          .eq(0)
          .html(caption);
      } else {
        self.$caption = null;
      }

      if (!self.hasHiddenControls && !self.isIdle) {
        self.showControls();
      }

      // Update info and navigation elements
      $container.find("[data-fancybox-count]").html(self.group.length);
      $container.find("[data-fancybox-index]").html(index + 1);

      $container.find("[data-fancybox-prev]").prop("disabled", !current.opts.loop && index <= 0);
      $container.find("[data-fancybox-next]").prop("disabled", !current.opts.loop && index >= self.group.length - 1);

      if (current.type === "image") {
        // Re-enable buttons; update download button source
        $container
          .find("[data-fancybox-zoom]")
          .show()
          .end()
          .find("[data-fancybox-download]")
          .attr("href", current.opts.image.src || current.src)
          .show();
      } else if (current.opts.toolbar) {
        $container.find("[data-fancybox-download],[data-fancybox-zoom]").hide();
      }

      // Make sure focus is not on disabled button/element
      if ($(document.activeElement).is(":hidden,[disabled]")) {
        self.$refs.container.trigger("focus");
      }
    },

    // Hide toolbar and caption
    // ========================

    hideControls: function(andCaption) {
      var self = this,
        arr = ["infobar", "toolbar", "nav"];

      if (andCaption || !self.current.opts.preventCaptionOverlap) {
        arr.push("caption");
      }

      this.$refs.container.removeClass(
        arr
          .map(function(i) {
            return "fancybox-show-" + i;
          })
          .join(" ")
      );

      this.hasHiddenControls = true;
    },

    showControls: function() {
      var self = this,
        opts = self.current ? self.current.opts : self.opts,
        $container = self.$refs.container;

      self.hasHiddenControls = false;
      self.idleSecondsCounter = 0;

      $container
        .toggleClass("fancybox-show-toolbar", !!(opts.toolbar && opts.buttons))
        .toggleClass("fancybox-show-infobar", !!(opts.infobar && self.group.length > 1))
        .toggleClass("fancybox-show-caption", !!self.$caption)
        .toggleClass("fancybox-show-nav", !!(opts.arrows && self.group.length > 1))
        .toggleClass("fancybox-is-modal", !!opts.modal);
    },

    // Toggle toolbar and caption
    // ==========================

    toggleControls: function() {
      if (this.hasHiddenControls) {
        this.showControls();
      } else {
        this.hideControls();
      }
    }
  });

  $.fancybox = {
    version: "{fancybox-version}",
    defaults: defaults,

    // Get current instance and execute a command.
    //
    // Examples of usage:
    //
    //   $instance = $.fancybox.getInstance();
    //   $.fancybox.getInstance().jumpTo( 1 );
    //   $.fancybox.getInstance( 'jumpTo', 1 );
    //   $.fancybox.getInstance( function() {
    //       console.info( this.currIndex );
    //   });
    // ======================================================

    getInstance: function(command) {
      var instance = $('.fancybox-container:not(".fancybox-is-closing"):last').data("FancyBox"),
        args = Array.prototype.slice.call(arguments, 1);

      if (instance instanceof FancyBox) {
        if ($.type(command) === "string") {
          instance[command].apply(instance, args);
        } else if ($.type(command) === "function") {
          command.apply(instance, args);
        }

        return instance;
      }

      return false;
    },

    // Create new instance
    // ===================

    open: function(items, opts, index) {
      return new FancyBox(items, opts, index);
    },

    // Close current or all instances
    // ==============================

    close: function(all) {
      var instance = this.getInstance();

      if (instance) {
        instance.close();

        // Try to find and close next instance
        if (all === true) {
          this.close(all);
        }
      }
    },

    // Close all instances and unbind all events
    // =========================================

    destroy: function() {
      this.close(true);

      $D.add("body").off("click.fb-start", "**");
    },

    // Try to detect mobile devices
    // ============================

    isMobile: /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent),

    // Detect if 'translate3d' support is available
    // ============================================

    use3d: (function() {
      var div = document.createElement("div");

      return (
        window.getComputedStyle &&
        window.getComputedStyle(div) &&
        window.getComputedStyle(div).getPropertyValue("transform") &&
        !(document.documentMode && document.documentMode < 11)
      );
    })(),

    // Helper function to get current visual state of an element
    // returns array[ top, left, horizontal-scale, vertical-scale, opacity ]
    // =====================================================================

    getTranslate: function($el) {
      var domRect;

      if (!$el || !$el.length) {
        return false;
      }

      domRect = $el[0].getBoundingClientRect();

      return {
        top: domRect.top || 0,
        left: domRect.left || 0,
        width: domRect.width,
        height: domRect.height,
        opacity: parseFloat($el.css("opacity"))
      };
    },

    // Shortcut for setting "translate3d" properties for element
    // Can set be used to set opacity, too
    // ========================================================

    setTranslate: function($el, props) {
      var str = "",
        css = {};

      if (!$el || !props) {
        return;
      }

      if (props.left !== undefined || props.top !== undefined) {
        str =
          (props.left === undefined ? $el.position().left : props.left) +
          "px, " +
          (props.top === undefined ? $el.position().top : props.top) +
          "px";

        if (this.use3d) {
          str = "translate3d(" + str + ", 0px)";
        } else {
          str = "translate(" + str + ")";
        }
      }

      if (props.scaleX !== undefined && props.scaleY !== undefined) {
        str += " scale(" + props.scaleX + ", " + props.scaleY + ")";
      } else if (props.scaleX !== undefined) {
        str += " scaleX(" + props.scaleX + ")";
      }

      if (str.length) {
        css.transform = str;
      }

      if (props.opacity !== undefined) {
        css.opacity = props.opacity;
      }

      if (props.width !== undefined) {
        css.width = props.width;
      }

      if (props.height !== undefined) {
        css.height = props.height;
      }

      return $el.css(css);
    },

    // Simple CSS transition handler
    // =============================

    animate: function($el, to, duration, callback, leaveAnimationName) {
      var self = this,
        from;

      if ($.isFunction(duration)) {
        callback = duration;
        duration = null;
      }

      self.stop($el);

      from = self.getTranslate($el);

      $el.on(transitionEnd, function(e) {
        // Skip events from child elements and z-index change
        if (e && e.originalEvent && (!$el.is(e.originalEvent.target) || e.originalEvent.propertyName == "z-index")) {
          return;
        }

        self.stop($el);

        if ($.isNumeric(duration)) {
          $el.css("transition-duration", "");
        }

        if ($.isPlainObject(to)) {
          if (to.scaleX !== undefined && to.scaleY !== undefined) {
            self.setTranslate($el, {
              top: to.top,
              left: to.left,
              width: from.width * to.scaleX,
              height: from.height * to.scaleY,
              scaleX: 1,
              scaleY: 1
            });
          }
        } else if (leaveAnimationName !== true) {
          $el.removeClass(to);
        }

        if ($.isFunction(callback)) {
          callback(e);
        }
      });

      if ($.isNumeric(duration)) {
        $el.css("transition-duration", duration + "ms");
      }

      // Start animation by changing CSS properties or class name
      if ($.isPlainObject(to)) {
        if (to.scaleX !== undefined && to.scaleY !== undefined) {
          delete to.width;
          delete to.height;

          if ($el.parent().hasClass("fancybox-slide--image")) {
            $el.parent().addClass("fancybox-is-scaling");
          }
        }

        $.fancybox.setTranslate($el, to);
      } else {
        $el.addClass(to);
      }

      // Make sure that `transitionend` callback gets fired
      $el.data(
        "timer",
        setTimeout(function() {
          $el.trigger(transitionEnd);
        }, duration + 33)
      );
    },

    stop: function($el, callCallback) {
      if ($el && $el.length) {
        clearTimeout($el.data("timer"));

        if (callCallback) {
          $el.trigger(transitionEnd);
        }

        $el.off(transitionEnd).css("transition-duration", "");

        $el.parent().removeClass("fancybox-is-scaling");
      }
    }
  };

  // Default click handler for "fancyboxed" links
  // ============================================

  function _run(e, opts) {
    var items = [],
      index = 0,
      $target,
      value,
      instance;

    // Avoid opening multiple times
    if (e && e.isDefaultPrevented()) {
      return;
    }

    e.preventDefault();

    opts = opts || {};

    if (e && e.data) {
      opts = mergeOpts(e.data.options, opts);
    }

    $target = opts.$target || $(e.currentTarget).trigger("blur");
    instance = $.fancybox.getInstance();

    if (instance && instance.$trigger && instance.$trigger.is($target)) {
      return;
    }

    if (opts.selector) {
      items = $(opts.selector);
    } else {
      // Get all related items and find index for clicked one
      value = $target.attr("data-fancybox") || "";

      if (value) {
        items = e.data ? e.data.items : [];
        items = items.length ? items.filter('[data-fancybox="' + value + '"]') : $('[data-fancybox="' + value + '"]');
      } else {
        items = [$target];
      }
    }

    index = $(items).index($target);

    // Sometimes current item can not be found
    if (index < 0) {
      index = 0;
    }

    instance = $.fancybox.open(items, opts, index);

    // Save last active element
    instance.$trigger = $target;
  }

  // Create a jQuery plugin
  // ======================

  $.fn.fancybox = function(options) {
    var selector;

    options = options || {};
    selector = options.selector || false;

    if (selector) {
      // Use body element instead of document so it executes first
      $("body")
        .off("click.fb-start", selector)
        .on("click.fb-start", selector, {options: options}, _run);
    } else {
      this.off("click.fb-start").on(
        "click.fb-start",
        {
          items: this,
          options: options
        },
        _run
      );
    }

    return this;
  };

  // Self initializing plugin for all elements having `data-fancybox` attribute
  // ==========================================================================

  $D.on("click.fb-start", "[data-fancybox]", _run);

  // Enable "trigger elements"
  // =========================

  $D.on("click.fb-start", "[data-fancybox-trigger]", function(e) {
    $('[data-fancybox="' + $(this).attr("data-fancybox-trigger") + '"]')
      .eq($(this).attr("data-fancybox-index") || 0)
      .trigger("click.fb-start", {
        $trigger: $(this)
      });
  });

  // Track focus event for better accessibility styling
  // ==================================================
  (function() {
    var buttonStr = ".fancybox-button",
      focusStr = "fancybox-focus",
      $pressed = null;

    $D.on("mousedown mouseup focus blur", buttonStr, function(e) {
      switch (e.type) {
        case "mousedown":
          $pressed = $(this);
          break;
        case "mouseup":
          $pressed = null;
          break;
        case "focusin":
          $(buttonStr).removeClass(focusStr);

          if (!$(this).is($pressed) && !$(this).is("[disabled]")) {
            $(this).addClass(focusStr);
          }
          break;
        case "focusout":
          $(buttonStr).removeClass(focusStr);
          break;
      }
    });
  })();
})(window, document, jQuery);