{"version":3,"file":"/pc/all/libs/lightbox/viewer.js.map","sources":["/pc/all/libs/lightbox/viewer.js"],"sourcesContent":["/* global define */\r\n\r\n// TODO: external controls like carousel?\r\n// TODO: Add swipe next/previous when zoomed out?\r\n\r\n(function(factory) {\r\n    if (typeof define === \"function\" && define.amd) {\r\n      define([\r\n        \"jquery\",\r\n        \"./core\",\r\n        \"./transition\"\r\n      ], factory);\r\n    } else {\r\n      factory(jQuery, Formstone);\r\n    }\r\n  }(function($, Formstone) {\r\n\r\n    \"use strict\";\r\n\r\n    /**\r\n     * @method private\r\n     * @name setup\r\n     * @description Setup plugin.\r\n     */\r\n\r\n    function setup() {\r\n      scroll();\r\n      $Window.on(\"scroll\", scroll);\r\n      $Body = Formstone.$body;\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name resize\r\n     * @description Handles window resize\r\n     */\r\n\r\n    function resize() {\r\n      Functions.iterate.call($Instances, resizeInstance);\r\n      // Functions.iterate.call($LazyInstances, cacheScrollPosition);\r\n      // Functions.iterate.call($LazyInstances, checkScrollPosition);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name scroll\r\n     * @description Handles window scroll\r\n     */\r\n\r\n    function scroll() {\r\n      ScrollTop = $Window.scrollTop() + Formstone.windowHeight;\r\n\r\n      if (ScrollTop < 0) {\r\n        ScrollTop = 0;\r\n      }\r\n\r\n      // Functions.iterate.call($LazyInstances, checkScrollPosition);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name raf\r\n     * @description Handles request animation frame\r\n     */\r\n\r\n    function raf() {\r\n      Functions.iterate.call($Instances, renderRAF);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name cacheInstances\r\n     * @description Caches active instances\r\n     */\r\n\r\n    function cacheInstances() {\r\n      $Instances = $(Classes.base);\r\n      // $LazyInstances = $(Classes.lazy);\r\n\r\n      // Functions.iterate.call($LazyInstances, cacheScrollPosition);\r\n\r\n      if ($Instances.length) {\r\n        Functions.lockViewport(Namespace);\r\n      } else {\r\n        Functions.unlockViewport(Namespace);\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name construct\r\n     * @description Builds instance.\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function construct(data) {\r\n      var $image,\r\n        imageData,\r\n        html = '',\r\n        controlPrevClasses = [RawClasses.control, RawClasses.control_previous].join(\" \"),\r\n        controlNextClasses = [RawClasses.control, RawClasses.control_next].join(\" \"),\r\n        controlZoomInClasses = [RawClasses.control, RawClasses.control_zoom_in].join(\" \"),\r\n        controlZoomOutClasses = [RawClasses.control, RawClasses.control_zoom_out].join(\" \");\r\n\r\n      data.thisClasses = [RawClasses.base, RawClasses.loading, data.customClass, data.theme];\r\n      data.images = [];\r\n      data.source = false;\r\n      data.gallery = false;\r\n      data.tapTimer = null;\r\n      data.action = false;\r\n      data.isRendering = false;\r\n      data.isZooming = false;\r\n      data.isAnimating = false;\r\n\r\n      data.keyDownTime = 1;\r\n\r\n      data.$images = this.find(\"img\").addClass(RawClasses.source);\r\n      data.index = 0;\r\n      data.total = data.$images.length - 1;\r\n\r\n      // Check custom controls\r\n      data.customControls = ($.type(data.controls) === \"object\" && data.controls.zoom_in && data.controls.zoom_out);\r\n\r\n      if (data.$images.length > 1) {\r\n        data.gallery = true;\r\n        data.thisClasses.push(RawClasses.gallery);\r\n\r\n        // Requie zoom for gallery custom controls\r\n        if (data.customControls && (!data.controls.previous || !data.controls.next)) {\r\n          data.customControls = false;\r\n        }\r\n      }\r\n\r\n      for (var i = 0; i < data.$images.length; i++) {\r\n        $image = data.$images.eq(i);\r\n        data.images.push($image.attr(\"src\"));\r\n      }\r\n\r\n      html += '<div class=\"' + RawClasses.wrapper + '\">';\r\n      html += '<div class=\"' + RawClasses.loading_icon + '\"></div>';\r\n      html += '<div class=\"' + RawClasses.viewport + '\"></div>';\r\n      html += '</div>'; // wrapper\r\n\r\n      if (data.controls && !data.customControls) {\r\n        html += '<div class=\"' + RawClasses.controls + '\">';\r\n        html += '<button type=\"button\" class=\"' + controlPrevClasses + '\">' + data.labels.previous + '</button>';\r\n        html += '<button type=\"button\" class=\"' + controlZoomOutClasses + '\">' + data.labels.zoom_out + '</button>';\r\n        html += '<button type=\"button\" class=\"' + controlZoomInClasses + '\">' + data.labels.zoom_in + '</button>';\r\n        html += '<button type=\"button\" class=\"' + controlNextClasses + '\">' + data.labels.next + '</button>';\r\n        html += '</div>'; // controls\r\n      }\r\n\r\n      this.addClass(data.thisClasses.join(\" \"))\r\n        .prepend(html);\r\n\r\n      data.$wrapper = this.find(Classes.wrapper);\r\n      data.$viewport = this.find(Classes.viewport);\r\n\r\n      if (data.customControls) {\r\n        data.$controls = $(data.controls.container).addClass([RawClasses.controls, RawClasses.controls_custom].join(\" \"));\r\n        data.$controlPrevious = $(data.controls.previous).addClass(controlPrevClasses);\r\n        data.$controlNext = $(data.controls.next).addClass(controlNextClasses);\r\n        data.$controlZoomIn = $(data.controls.zoom_in).addClass(controlZoomInClasses);\r\n        data.$controlZoomOut = $(data.controls.zoom_out).addClass(controlZoomOutClasses);\r\n      } else {\r\n        data.$controls = this.find(Classes.controls);\r\n        data.$controlPrevious = this.find(Classes.control_previous);\r\n        data.$controlNext = this.find(Classes.control_next);\r\n        data.$controlZoomIn = this.find(Classes.control_zoom_in);\r\n        data.$controlZoomOut = this.find(Classes.control_zoom_out);\r\n      }\r\n\r\n      data.$controlItems = data.$controlPrevious.add(data.$controlNext);\r\n      data.$controlZooms = data.$controlZoomIn.add(data.$controlZoomOut);\r\n\r\n      cacheInstances();\r\n\r\n      data.$controlItems.on(Events.click, data, advanceGallery);\r\n      data.$controlZooms.on([Events.touchStart, Events.mouseDown].join(\" \"), data, onZoomStart)\r\n        .on([Events.touchEnd, Events.mouseUp].join(\" \"), data, onClearZoom);\r\n\r\n      // if (data.lazy) {\r\n      //  checkScrollPosition(data);\r\n      // } else {\r\n      loadImage(data, data.images[data.index], true);\r\n      // }\r\n\r\n      updateControls(data);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name destruct\r\n     * @description Tears down instance.\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function destruct(data) {\r\n      data.$wrapper.remove();\r\n\r\n      data.$image.removeClass(RawClasses.source);\r\n\r\n      if (data.controls && !data.customControls) {\r\n        data.$controls.remove();\r\n      }\r\n\r\n      if (data.customControls) {\r\n        data.$controls.removeClass([RawClasses.controls, RawClasses.controls_custom].join(\" \"));\r\n        data.$controlItems.off(Events.click).removeClass([RawClasses.control, RawClasses.control_previous, RawClasses.control_next].join(\" \"));\r\n        data.$controlZooms.off([Events.touchStart, Events.mouseDown].join(\" \"))\r\n          .off([Events.touchStart, Events.mouseDown].join(\" \"))\r\n          .off([Events.touchEnd, Events.mouseUp].join(\" \"))\r\n          .removeClass([RawClasses.control, RawClasses.control_zoom_in, RawClasses.control_zoom_out].join(\" \"));\r\n      }\r\n\r\n      this.removeClass(data.thisClasses.join(\" \"))\r\n        .off(Events.namespace);\r\n\r\n      cacheInstances();\r\n    }\r\n\r\n    /**\r\n     * @method\r\n     * @name load\r\n     * @description Loads source image\r\n     * @param source [string OR array] \"Source image (string) or array of images (array)\"\r\n     * @example $(\".target\").viewer(\"load\", \"path/to/image.jpg\");\r\n     * @example $(\".target\").viewer(\"load\", [\"path/to/image-1.jpg\",\"path/to/image-2.jpg\"]);\r\n     */\r\n\r\n    function load(data, source) {\r\n      data.index = 0;\r\n\r\n      if (typeof source === \"string\") {\r\n        data.total = 0;\r\n        data.images = [source];\r\n        data.gallery = false;\r\n\r\n        data.$el.removeClass(RawClasses.gallery);\r\n      } else {\r\n        data.total = source.length - 1;\r\n        data.images = source;\r\n\r\n        if (source.length > 1) {\r\n          data.gallery = true;\r\n          data.$el.addClass(RawClasses.gallery);\r\n        }\r\n\r\n        source = data.images[data.index];\r\n      }\r\n\r\n      unloadImage(data, function() {\r\n        loadImage(data, source);\r\n      });\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name loadInitialImage\r\n     * @description Loads first source image\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function loadInitialImage(data) {\r\n      loadImage(data, data.images[data.index]);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name loadImage\r\n     * @description Loads source image\r\n     * @param data [object] \"Instance data\"\r\n     * @param source [string] \"Source image\"\r\n     * @param initialLoad [boolean] \"Is initial load\"\r\n     */\r\n\r\n    function loadImage(data, source, initialLoad) {\r\n      if (!data.isAnimating) {\r\n        data.isAnimating = true;\r\n\r\n        data.$container = $('<div class=\"' + RawClasses.container + '\"><img></div>');\r\n        data.$image = data.$container.find(\"img\");\r\n\r\n        data.$viewport.append(data.$container);\r\n\r\n        // Load image\r\n        data.$image.one(Events.load, function() {\r\n            onImageReady(data);\r\n\r\n            data.isAnimating = false;\r\n\r\n            // Transition in\r\n            data.$container.fsTransition({\r\n                property: \"opacity\"\r\n              },\r\n              function() {\r\n                // Loaded\r\n              });\r\n\r\n            data.$el.removeClass(RawClasses.loading);\r\n\r\n            data.$container.fsTouch({\r\n                pan: true,\r\n                scale: true\r\n              }).on(Events.scaleStart, data, onScaleStart)\r\n              .on(Events.scaleEnd, data, onScaleEnd)\r\n              .on(Events.scale, data, onScale);\r\n\r\n            data.$el.trigger(Events.loaded);\r\n          }).one(Events.error, data, loadError)\r\n          .attr(\"src\", source)\r\n          .addClass(RawClasses.image);\r\n\r\n        // Check if image is cached\r\n        if (data.$image[0].complete || data.$image[0].readyState === 4) {\r\n          data.$image.trigger(Events.load);\r\n        }\r\n\r\n        data.source = source;\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name loadError\r\n     * @description Error when resource fails to load.\r\n     */\r\n\r\n    function loadError(e) {\r\n      var data = e.data;\r\n\r\n      data.$el.trigger(Events.error);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name onImageReady\r\n     * @description Sets up image data\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    // on initial load\r\n    function onImageReady(data) {\r\n      // Cache image properties\r\n      // First for container\r\n      cacheImageProps(data);\r\n\r\n      // Cache viewport properties\r\n      cacheViewportProps(data);\r\n\r\n      // Set initial container position\r\n      data.containerTop = (data.viewportHeight / 2);\r\n      data.containerLeft = (data.viewportWidth / 2);\r\n\r\n      // Cache image min max\r\n      cacheImageMinMax(data);\r\n\r\n      // Set initial image size\r\n      data.imageHeight = data.naturalHeight;\r\n      data.imageWidth = data.naturalWidth;\r\n\r\n      // Size the image to fit into the viewport\r\n      fitToViewport(data);\r\n\r\n      // Cache container min max\r\n      cacheContainerMinMax(data);\r\n\r\n      // Cache image top left\r\n      cacheImageTopLeft(data);\r\n\r\n      // Cache last props\r\n      cacheLastProps(data);\r\n\r\n      // Cache render props\r\n      cacheRenderProps(data);\r\n\r\n      // Update dom\r\n      var props = {\r\n        containerTop: data.containerTop,\r\n        containerLeft: data.containerLeft,\r\n        imageHeight: data.imageHeight,\r\n        imageWidth: data.imageWidth,\r\n        imageTop: data.imageTop,\r\n        imageLeft: data.imageLeft,\r\n      };\r\n\r\n      setSizeAndPosition(data, props);\r\n\r\n      data.isRendering = true;\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name cacheImageProps\r\n     * @description Caches image properties\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function cacheImageProps(data) {\r\n      var naturalSize = calculateNaturalSize(data.$image);\r\n\r\n      data.naturalHeight = naturalSize.naturalHeight;\r\n      data.naturalWidth = naturalSize.naturalWidth;\r\n\r\n      data.ratioHorizontal = data.naturalHeight / data.naturalWidth;\r\n      data.ratioVertical = data.naturalWidth / data.naturalHeight;\r\n\r\n      data.isWide = (data.naturalWidth > data.naturalHeight);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name cacheViewportProps\r\n     * @description Caches viewport properties\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function cacheViewportProps(data) {\r\n      data.viewportHeight = data.$viewport.outerHeight();\r\n      data.viewportWidth = data.$viewport.outerWidth();\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name cacheContainerProps\r\n     * @description Caches container properties\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function cacheContainerMinMax(data) {\r\n      if (data.imageHeight <= data.viewportHeight) {\r\n        data.containerMinTop = (data.viewportHeight / 2);\r\n        data.containerMaxTop = (data.viewportHeight / 2);\r\n      } else {\r\n        data.containerMinTop = data.viewportHeight - (data.imageHeight / 2);\r\n        data.containerMaxTop = (data.imageHeight / 2);\r\n      }\r\n\r\n      if (data.imageWidth <= data.viewportWidth) {\r\n        data.containerMinLeft = (data.viewportWidth / 2);\r\n        data.containerMaxLeft = (data.viewportWidth / 2);\r\n      } else {\r\n        data.containerMinLeft = data.viewportWidth - (data.imageWidth / 2);\r\n        data.containerMaxLeft = (data.imageWidth / 2);\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name cacheImageMinMax\r\n     * @description Caches image min and max based on viewport and size\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function cacheImageMinMax(data) {\r\n      // Set min\r\n      if (data.isWide) {\r\n        //WIDE\r\n        data.imageMinWidth = data.viewportWidth;\r\n        data.imageMinHeight = data.imageMinWidth * data.ratioHorizontal;\r\n\r\n        if (data.imageMinHeight > data.viewportHeight) {\r\n          data.imageMinHeight = data.viewportHeight;\r\n          data.imageMinWidth = data.imageMinHeight * data.ratioVertical;\r\n        }\r\n      } else {\r\n        //TALL\r\n        data.imageMinHeight = data.viewportHeight;\r\n        data.imageMinWidth = data.imageMinHeight * data.ratioVertical;\r\n\r\n        if (data.imageMinWidth > data.viewportWidth) {\r\n          data.imageMinWidth = data.viewportWidth;\r\n          data.imageMinHeight = data.imageMinWidth * data.ratioHorizontal;\r\n        }\r\n      }\r\n\r\n      // Check natural max against new min\r\n      if (data.imageMinWidth > data.naturalWidth || data.imageMinHeight > data.naturalHeight) {\r\n        data.imageMinHeight = data.naturalHeight;\r\n        data.imageMinWidth = data.naturalWidth;\r\n      }\r\n\r\n      // Set max\r\n      data.imageMaxHeight = data.naturalHeight;\r\n      data.imageMaxWidth = data.naturalWidth;\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name cacheImageTopLeft\r\n     * @description Caches image top and left based on viewport and size\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function cacheImageTopLeft(data) {\r\n      data.imageTop = -(data.imageHeight / 2);\r\n      data.imageLeft = -(data.imageWidth / 2);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name cacheLastProps\r\n     * @description Caches last container and image properties\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function cacheLastProps(data) {\r\n      data.lastContainerTop = data.containerTop;\r\n      data.lastContainerLeft = data.containerLeft;\r\n\r\n      data.lastImageHeight = data.imageHeight;\r\n      data.lastImageWidth = data.imageWidth;\r\n\r\n      data.lastImageTop = data.imageTop;\r\n      data.lastImageLeft = data.imageLeft;\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name cacheRenderProps\r\n     * @description Caches container and image render properties\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function cacheRenderProps(data) {\r\n      data.renderContainerTop = data.lastContainerTop;\r\n      data.renderContainerLeft = data.lastContainerLeft;\r\n\r\n      data.renderImageTop = data.lastImageTop;\r\n      data.renderImageLeft = data.lastImageLeft;\r\n\r\n      data.renderImageHeight = data.lastImageHeight;\r\n      data.renderImageWidth = data.lastImageWidth;\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name fitToViewport\r\n     * @description Fits image to viewport size\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function fitToViewport(data) {\r\n      data.imageHeight = data.imageMinHeight;\r\n      data.imageWidth = data.imageMinWidth;\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name checkImageMinMax\r\n     * @description Checks image properties against min and max\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    // on scale\r\n    function checkImageMinMax(data) {\r\n      if (data.imageHeight < data.imageMinHeight) {\r\n        data.imageHeight = data.imageMinHeight;\r\n      }\r\n      if (data.imageHeight > data.imageMaxHeight) {\r\n        data.imageHeight = data.imageMaxHeight;\r\n      }\r\n\r\n      if (data.imageWidth < data.imageMinWidth) {\r\n        data.imageWidth = data.imageMinWidth;\r\n      }\r\n      if (data.imageWidth > data.imageMaxWidth) {\r\n        data.imageWidth = data.imageMaxWidth;\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name checkContainerTopLeft\r\n     * @description Checks container properties against top and left\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function checkContainerTopLeft(data) {\r\n      if (data.containerTop < data.containerMinTop) {\r\n        data.containerTop = data.containerMinTop;\r\n      }\r\n      if (data.containerTop > data.containerMaxTop) {\r\n        data.containerTop = data.containerMaxTop;\r\n      }\r\n\r\n      if (data.containerLeft < data.containerMinLeft) {\r\n        data.containerLeft = data.containerMinLeft;\r\n      }\r\n      if (data.containerLeft > data.containerMaxLeft) {\r\n        data.containerLeft = data.containerMaxLeft;\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name checkDoubleTap\r\n     * @description Checks is double tapping\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function checkDoubleTap(data) {\r\n      if (data.tapTimer === null) {\r\n        data.tapTimer = Functions.startTimer(data.tapTimer, 500, function() {\r\n          clearDoubleTap(data);\r\n        });\r\n      } else {\r\n        clearDoubleTap(data);\r\n        onImageZoom(data);\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name clearDoubleTap\r\n     * @description Clears double tap timer\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function clearDoubleTap(data) {\r\n      Functions.clearTimer(data.tapTimer);\r\n      data.tapTimer = null;\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name setSizeAndPosition\r\n     * @description Updates image and container DOM\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function setSizeAndPosition(data, props) {\r\n      if (Formstone.transform) {\r\n        var scaleX = props.imageWidth / data.naturalWidth,\r\n          scaleY = props.imageHeight / data.naturalHeight;\r\n\r\n        data.$container.css(Formstone.transform, \"translate3d(\" + props.containerLeft + \"px, \" + props.containerTop + \"px, 0)\");\r\n        data.$image.css(Formstone.transform, \"translate3d(-50%, -50%, 0) scale(\" + scaleX + \",\" + scaleY + \")\");\r\n      } else {\r\n        data.$container.css({\r\n          top: props.containerTop,\r\n          left: props.containerLeft\r\n        });\r\n\r\n        data.$image.css({\r\n          height: props.imageHeight,\r\n          width: props.imageWidth,\r\n          top: props.imageTop,\r\n          left: props.imageLeft\r\n        });\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name onScaleStart\r\n     * @description Handles scale start event\r\n     * @param e [object] \"Event data\"\r\n     */\r\n\r\n    function onScaleStart(e) {\r\n      var data = e.data;\r\n\r\n      // Check double tap\r\n      checkDoubleTap(data);\r\n\r\n      // Cache previous values\r\n      cacheLastProps(data);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name onScale\r\n     * @description Handles scale event\r\n     * @param e [object] \"Event data\"\r\n     */\r\n\r\n    function onScale(e) {\r\n      var data = e.data;\r\n\r\n      // Clear double tap\r\n      clearDoubleTap(data);\r\n\r\n      data.isRendering = false;\r\n      data.isZooming = false;\r\n\r\n      var zoomed = (data.imageHeight > data.imageMinHeight + 1);\r\n\r\n      // Change container position\r\n      data.containerTop = data.lastContainerTop + e.deltaY;\r\n      data.containerLeft = data.lastContainerLeft + e.deltaX;\r\n\r\n      /*\r\n          var diffX  = data.lastContainerLeft - data.containerLeft,\r\n            diffY  = data.lastContainerTop - data.containerTop;\r\n\r\n          data.containerLeft -= diffX;\r\n          data.containerTop  -= diffY;\r\n      */\r\n\r\n      // Change image size\r\n      data.imageHeight = data.lastImageHeight * e.scale;\r\n      data.imageWidth = data.lastImageWidth * e.scale;\r\n\r\n      // Cache container min max\r\n      cacheContainerMinMax(data);\r\n\r\n      // Check container top left\r\n      checkContainerTopLeft(data);\r\n\r\n      // Check image min max\r\n      checkImageMinMax(data);\r\n\r\n      // Cache image top left\r\n      cacheImageTopLeft(data);\r\n\r\n      // Update dom\r\n      var props = {\r\n        containerTop: data.containerTop,\r\n        containerLeft: data.containerLeft,\r\n        imageHeight: data.imageHeight,\r\n        imageWidth: data.imageWidth,\r\n        imageTop: data.imageTop,\r\n        imageLeft: data.imageLeft,\r\n      };\r\n\r\n      setSizeAndPosition(data, props);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name onScaleEnd\r\n     * @description Handles scale end event\r\n     * @param e [object] \"Event data\"\r\n     */\r\n\r\n    function onScaleEnd(e) {\r\n      var data = e.data;\r\n\r\n      if (!data.isZooming) {\r\n        // Cache last properties\r\n        cacheLastProps(data);\r\n\r\n        // Cache rander properties\r\n        cacheRenderProps(data);\r\n\r\n        data.isRendering = true;\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name onImageZoom\r\n     * @description Zooms image in or out depending on current size\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function onImageZoom(data) {\r\n      var zoomed = (data.imageHeight > data.imageMinHeight + 1);\r\n\r\n      data.isZooming = true;\r\n\r\n      // Cache last properties\r\n      cacheLastProps(data);\r\n\r\n      // Cache rander properties\r\n      cacheRenderProps(data);\r\n\r\n      if (zoomed) {\r\n        // zoomed in (go to min)\r\n        data.imageHeight = data.imageMinHeight;\r\n        data.imageWidth = data.imageMinWidth;\r\n      } else {\r\n        // zoomed out (go to max)\r\n        data.imageHeight = data.imageMaxHeight;\r\n        data.imageWidth = data.imageMaxWidth;\r\n      }\r\n\r\n      // Cache container min max\r\n      cacheContainerMinMax(data);\r\n\r\n      // Check container top left\r\n      checkContainerTopLeft(data);\r\n\r\n      // Cache image top left\r\n      cacheImageTopLeft(data);\r\n\r\n      data.isRendering = true;\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name onZoomStart\r\n     * @description Handle zoom start\r\n     * @param e [object] \"Event data\"\r\n     */\r\n\r\n    function onZoomStart(e) {\r\n      Functions.killEvent(e);\r\n\r\n      var $target = $(e.currentTarget),\r\n        data = e.data,\r\n        direction = ($target.hasClass(RawClasses.control_zoom_out)) ? 'out' : 'in';\r\n\r\n      if (direction === 'out') {\r\n        onZoomOut(data);\r\n      } else {\r\n        onZoomIn(data);\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name onZoomIn\r\n     * @description Handle zoom in\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function onZoomIn(data) {\r\n      data.keyDownTime = 1;\r\n      data.action = 'zoom_in';\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name onZoomOut\r\n     * @description Handle zoom out\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function onZoomOut(data) {\r\n      data.keyDownTime = 1;\r\n      data.action = 'zoom_out';\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name onClearZoom\r\n     * @description Handle clear zoom\r\n     * @param e [object] \"Event data\"\r\n     */\r\n\r\n    function onClearZoom(e) {\r\n      var data = e.data;\r\n\r\n      data.action = false;\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name renderRAF\r\n     * @description Updates DOM based on animation values\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function renderRAF(data) {\r\n      if (data.isRendering) {\r\n        if (data.action) {\r\n          data.keyDownTime += data.zoomIncrement;\r\n\r\n          var delta = ((data.action === \"zoom_out\") ? -1 : 1) * Math.round((data.imageWidth * data.keyDownTime) - data.imageWidth);\r\n\r\n          if (delta > data.zoomDelta) {\r\n            delta = data.zoomDelta;\r\n          }\r\n\r\n          if (data.isWide) {\r\n            data.imageWidth += delta;\r\n            data.imageHeight = Math.round(data.imageWidth / data.ratioVertical);\r\n          } else {\r\n            data.imageHeight += delta;\r\n            data.imageWidth = Math.round(data.imageHeight / data.ratioHorizontal);\r\n          }\r\n\r\n          // Check image min max\r\n          checkImageMinMax(data);\r\n\r\n          // Cache image top left\r\n          cacheImageTopLeft(data);\r\n\r\n          // Cache container min max\r\n          cacheContainerMinMax(data);\r\n\r\n          // Check container top left\r\n          checkContainerTopLeft(data);\r\n        }\r\n\r\n        data.renderContainerTop += Math.round((data.containerTop - data.renderContainerTop) * data.zoomEnertia);\r\n        data.renderContainerLeft += Math.round((data.containerLeft - data.renderContainerLeft) * data.zoomEnertia);\r\n\r\n        data.renderImageTop += Math.round((data.imageTop - data.renderImageTop) * data.zoomEnertia);\r\n        data.renderImageLeft += Math.round((data.imageLeft - data.renderImageLeft) * data.zoomEnertia);\r\n\r\n        data.renderImageHeight += Math.round((data.imageHeight - data.renderImageHeight) * data.zoomEnertia);\r\n        data.renderImageWidth += Math.round((data.imageWidth - data.renderImageWidth) * data.zoomEnertia);\r\n\r\n        // Update DOM\r\n\r\n        var props = {\r\n          containerTop: data.renderContainerTop,\r\n          containerLeft: data.renderContainerLeft,\r\n          imageHeight: data.renderImageHeight,\r\n          imageWidth: data.renderImageWidth,\r\n          imageTop: data.renderImageTop,\r\n          imageLeft: data.renderImageLeft,\r\n        };\r\n\r\n        setSizeAndPosition(data, props);\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method\r\n     * @name unload\r\n     * @description Unloads current image\r\n     * @example $(\".target\").viewer(\"unload\");\r\n     */\r\n\r\n    function unload(data) {\r\n      unloadImage(data);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name unloadImage\r\n     * @description Unloads current image\r\n     * @param data [object] \"Instance data\"\r\n     * @param callback [function] \"Callback function\"\r\n     */\r\n\r\n    function unloadImage(data, callback) {\r\n      if (!data.isAnimating) {\r\n        clearDoubleTap(data);\r\n\r\n        data.isAnimating = true;\r\n        data.isRendering = false;\r\n        data.isZooming = false;\r\n\r\n        clearTouch(data);\r\n\r\n        data.$container.fsTransition({\r\n            property: \"opacity\"\r\n          },\r\n          function() {\r\n            data.isAnimating = false;\r\n\r\n            data.$container.remove();\r\n\r\n            if (typeof callback === \"function\") {\r\n              callback.call(window, data);\r\n            }\r\n          });\r\n\r\n        data.$el.addClass(RawClasses.loading);\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name advanceGallery\r\n     * @description Advances gallery\r\n     * @param e [object] \"Event data\"\r\n     */\r\n\r\n    function advanceGallery(e) {\r\n      Functions.killEvent(e);\r\n\r\n      var $target = $(e.currentTarget),\r\n        data = e.data,\r\n        index = data.index + (($target.hasClass(RawClasses.control_next)) ? 1 : -1);\r\n\r\n      if (!data.isAnimating) {\r\n        if (index < 0) {\r\n          index = 0;\r\n        }\r\n\r\n        if (index > data.total) {\r\n          index = data.total;\r\n        }\r\n\r\n        if (index !== data.index) {\r\n          data.index = index;\r\n\r\n          unloadImage(data, function() {\r\n            loadImage(data, data.images[data.index]);\r\n          });\r\n        }\r\n\r\n        updateControls(data);\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name updateControls\r\n     * @description Update control states\r\n     * @param data [object] Instance data\r\n     */\r\n\r\n    function updateControls(data) {\r\n      data.$controlItems.removeClass(RawClasses.control_disabled);\r\n\r\n      if (data.index === 0) {\r\n        data.$controlPrevious.addClass(RawClasses.control_disabled);\r\n      }\r\n      if (data.index === data.images.length - 1) {\r\n        data.$controlNext.addClass(RawClasses.control_disabled);\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name resize\r\n     * @description Resize target instance\r\n     * @example $(\".target\").viewer(\"resize\");\r\n     */\r\n\r\n    /**\r\n     * @method private\r\n     * @name resizeInstance\r\n     * @description Handle window resize event\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function resizeInstance(data) {\r\n      cacheViewportProps(data);\r\n\r\n      cacheContainerMinMax(data);\r\n\r\n      cacheImageMinMax(data);\r\n\r\n      cacheImageTopLeft(data);\r\n\r\n      cacheContainerMinMax(data);\r\n\r\n      checkContainerTopLeft(data);\r\n\r\n      checkImageMinMax(data);\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name clearTouch\r\n     * @description Clears current touch action.\r\n     */\r\n\r\n    function clearTouch(data) {\r\n      if (data.$container && data.$container.length) {\r\n        data.$container.fsTouch(\"destroy\")\r\n          .off(Events.scaleStart, onScaleStart)\r\n          .off(Events.scaleEnd, onScaleEnd)\r\n          .off(Events.scale, onScale);\r\n      }\r\n    }\r\n\r\n    /**\r\n     * @method private\r\n     * @name cacheScrollPosition\r\n     * @description Cahce target scroll position\r\n     * @param data [object] \"Instance data\"\r\n     */\r\n\r\n    function cacheScrollPosition(data) {\r\n      data.scrollTop = data.$el.offset().top;\r\n    }\r\n\r\n    // /**\r\n    //  * @method private\r\n    //  * @name checkScrollPosition\r\n    //  * @description Check target scroll position against window\r\n    //  * @param data [object] \"Instance data\"\r\n    //  */\r\n    //\r\n    // function checkScrollPosition(data) {\r\n    //   if (!data.visible && data.scrollTop < ScrollTop + data.lazyEdge) {\r\n    //     data.visible = true;\r\n    //     loadInitialImage(data);\r\n    //   }\r\n    // }\r\n\r\n    /**\r\n     * @method private\r\n     * @name calculateNaturalSize\r\n     * @description Determines natural size of target image.\r\n     * @param $img [jQuery object] \"Source image object\"\r\n     * @return [object | boolean] \"Object containing natural height and width values or false\"\r\n     */\r\n\r\n    function calculateNaturalSize($img) {\r\n      var node = $img[0],\r\n        img = new Image();\r\n\r\n      if (typeof node.naturalHeight !== \"undefined\") {\r\n        return {\r\n          naturalHeight: node.naturalHeight,\r\n          naturalWidth: node.naturalWidth\r\n        };\r\n      } else {\r\n        if (node.tagName.toLowerCase() === 'img') {\r\n          img.src = node.src;\r\n          return {\r\n            naturalHeight: img.height,\r\n            naturalWidth: img.width\r\n          };\r\n        }\r\n      }\r\n\r\n      return false;\r\n    }\r\n\r\n    /**\r\n     * @plugin\r\n     * @name Viewer\r\n     * @description A jQuery plugin for image exploration.\r\n     * @type widget\r\n     * @main viewer.js\r\n     * @main viewer.css\r\n     * @dependency jQuery\r\n     * @dependency core.js\r\n     * @dependency touch.js\r\n     * @dependency transition.js\r\n     */\r\n\r\n    var Plugin = Formstone.Plugin(\"viewer\", {\r\n        widget: true,\r\n\r\n        /**\r\n         * @options\r\n         * @param controls [boolean or object] <true> \"Flag to draw controls OR object containing container, next, previous, zoom_in and zoom_out control selectors (Must be fully qualified selectors)\"\r\n         * @param customClass [string] <''> \"Class applied to instance\"\r\n         // param lazy [boolean] <false> \"Lazy load with scroll\"\r\n         // param lazyEdge [int] <100> \"Lazy load edge\"\r\n         * @param labels.count [string] <'of'> \"Gallery count separator text\"\r\n         * @param labels.next [string] <'Next'> \"Gallery control text\"\r\n         * @param labels.previous [string] <'Previous'> \"Gallery control text\"\r\n         * @param labels.zoom_in [string] <'Zoom In'> \"Image zoom text\"\r\n         * @param labels.zoom_out [string] <'Zoom Out'> \"Image zoom text\"\r\n         * @param theme [string] <\"fs-light\"> \"Theme class name\"\r\n         * @param zoomDelta [int] <100> \"Max zoom change\"\r\n         * @param zoomEnertia [float] <0.2> \"Enertia for zoom\"\r\n         * @param zoomIncrement [float] <0.01> \"Increment for zoom buttons\"\r\n         */\r\n\r\n        defaults: {\r\n          controls: true,\r\n          customClass: \"\",\r\n          // lazy           : false,\r\n          // lazyEdge       : 100,\r\n          labels: {\r\n            count: \"of\",\r\n            next: \"Next\",\r\n            previous: \"Previous\",\r\n            zoom_in: \"Zoom In\",\r\n            zoom_out: \"Zoom Out\"\r\n          },\r\n          theme: \"fs-light\",\r\n          zoomDelta: 100,\r\n          zoomEnertia: 0.2,\r\n          zoomIncrement: 0.01\r\n        },\r\n\r\n        classes: [\r\n          \"source\",\r\n          \"wrapper\",\r\n          \"viewport\",\r\n          \"container\",\r\n          \"image\",\r\n          \"gallery\",\r\n          \"loading_icon\",\r\n\r\n          \"controls\",\r\n          \"controls_custom\",\r\n          \"control\",\r\n          \"control_previous\",\r\n          \"control_next\",\r\n          \"control_zoom_in\",\r\n          \"control_zoom_out\",\r\n          \"control_disabled\",\r\n          // \"lazy\"\r\n          \"loading\"\r\n        ],\r\n\r\n        /**\r\n         * @events\r\n         * @event loaded.viewer \"Image loaded\"\r\n         * @event ready.viewer \"Image ready\"\r\n         */\r\n\r\n        events: {\r\n          loaded: \"loaded\",\r\n          ready: \"ready\"\r\n        },\r\n\r\n        methods: {\r\n          _construct: construct,\r\n          _destruct: destruct,\r\n          _resize: resize,\r\n          _raf: raf,\r\n\r\n          resize: resizeInstance,\r\n          load: load,\r\n          unload: unload\r\n        }\r\n      }),\r\n\r\n      // Localize References\r\n\r\n      Namespace = Plugin.namespace,\r\n      Classes = Plugin.classes,\r\n      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