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* baguetteBox.js\r\n * @author feimosi\r\n * @version %%INJECT_VERSION%%\r\n * @url https://github.com/feimosi/baguetteBox.js\r\n */\r\n\r\n/* global define, module */\r\n\r\n(function (root, factory) {\r\n 'use strict';\r\n if (typeof define === 'function' && define.amd) {\r\n define(factory);\r\n } else if (typeof exports === 'object') {\r\n module.exports = factory();\r\n } else {\r\n root.baguetteBox = factory();\r\n }\r\n}(this, function () {\r\n 'use strict';\r\n\r\n // SVG shapes used on the buttons\r\n var leftArrow = '',\r\n rightArrow = '',\r\n closeX = '';\r\n // Global options and their defaults\r\n var options = {},\r\n defaults = {\r\n captions: true,\r\n fullScreen: false,\r\n noScrollbars: false,\r\n titleTag: false,\r\n buttons: 'auto',\r\n async: false,\r\n preload: 2,\r\n animation: 'slideIn',\r\n afterShow: null,\r\n afterHide: null,\r\n // callback when image changes with `currentIndex` and `imagesElements.length` as parameters\r\n onChange: null,\r\n overlayBackgroundColor: 'rgba(0,0,0,.8)'\r\n };\r\n // Object containing information about features compatibility\r\n var supports = {};\r\n // DOM Elements references\r\n var overlay, slider, previousButton, nextButton, closeButton;\r\n // An array with all images in the current gallery\r\n var currentGallery = [];\r\n // Current image index inside the slider\r\n var currentIndex = 0;\r\n // Touch event start position (for slide gesture)\r\n var touch = {};\r\n // If set to true ignore touch events because animation was already fired\r\n var touchFlag = false;\r\n // Regex pattern to match image files\r\n var regex = /.+\\.(gif|jpe?g|png|webp)/i;\r\n // Object of all used galleries\r\n var data = {};\r\n // Array containing temporary images DOM elements\r\n var imagesElements = [];\r\n // The last focused element before opening the overlay\r\n var documentLastFocus = null;\r\n var overlayClickHandler = function(event) {\r\n // Close the overlay when user clicks directly on the background\r\n if (event.target.id.indexOf('baguette-img') !== -1) {\r\n hideOverlay();\r\n }\r\n };\r\n var previousButtonClickHandler = function(event) {\r\n event.stopPropagation ? event.stopPropagation() : event.cancelBubble = true; // jshint ignore:line\r\n showPreviousImage();\r\n };\r\n var nextButtonClickHandler = function(event) {\r\n event.stopPropagation ? event.stopPropagation() : event.cancelBubble = true; // jshint ignore:line\r\n showNextImage();\r\n };\r\n var closeButtonClickHandler = function(event) {\r\n event.stopPropagation ? event.stopPropagation() : event.cancelBubble = true; // jshint ignore:line\r\n hideOverlay();\r\n };\r\n var touchstartHandler = function(event) {\r\n touch.count++;\r\n if (touch.count > 1) {\r\n touch.multitouch = true;\r\n }\r\n // Save x and y axis position\r\n touch.startX = event.changedTouches[0].pageX;\r\n touch.startY = event.changedTouches[0].pageY;\r\n };\r\n var touchmoveHandler = function(event) {\r\n // If action was already triggered or multitouch return\r\n if (touchFlag || touch.multitouch) {\r\n return;\r\n }\r\n event.preventDefault ? event.preventDefault() : event.returnValue = false; // jshint ignore:line\r\n var touchEvent = event.touches[0] || event.changedTouches[0];\r\n // Move at least 40 pixels to trigger the action\r\n if (touchEvent.pageX - touch.startX > 40) {\r\n touchFlag = true;\r\n showPreviousImage();\r\n } else if (touchEvent.pageX - touch.startX < -40) {\r\n touchFlag = true;\r\n showNextImage();\r\n // Move 100 pixels up to close the overlay\r\n } else if (touch.startY - touchEvent.pageY > 100) {\r\n hideOverlay();\r\n }\r\n };\r\n var touchendHandler = function() {\r\n touch.count--;\r\n if (touch.count <= 0) {\r\n touch.multitouch = false;\r\n }\r\n touchFlag = false;\r\n };\r\n\r\n var trapFocusInsideOverlay = function(event) {\r\n if (overlay.style.display === 'block' && !overlay.contains(event.target)) {\r\n event.stopPropagation();\r\n initFocus();\r\n }\r\n };\r\n\r\n // forEach polyfill for IE8\r\n // http://stackoverflow.com/a/14827443/1077846\r\n /* jshint ignore:start */\r\n if (![].forEach) {\r\n Array.prototype.forEach = function(callback, thisArg) {\r\n for (var i = 0; i < this.length; i++) {\r\n callback.call(thisArg, this[i], i, this);\r\n }\r\n };\r\n }\r\n\r\n // filter polyfill for IE8\r\n // https://gist.github.com/eliperelman/1031656\r\n if (![].filter) {\r\n Array.prototype.filter = function(a, b, c, d, e) {\r\n c = this;\r\n d = [];\r\n for (e = 0; e < c.length; e++)\r\n a.call(b, c[e], e, c) && d.push(c[e]);\r\n return d;\r\n };\r\n }\r\n /* jshint ignore:end */\r\n\r\n // Script entry point\r\n function run(selector, userOptions) {\r\n // Fill supports object\r\n supports.transforms = testTransformsSupport();\r\n supports.svg = testSVGSupport();\r\n\r\n buildOverlay();\r\n removeFromCache(selector);\r\n bindImageClickListeners(selector, userOptions);\r\n }\r\n\r\n function bindImageClickListeners(selector, userOptions) {\r\n // For each gallery bind a click event to every image inside it\r\n var galleryNodeList = document.querySelectorAll(selector);\r\n var selectorData = {\r\n galleries: [],\r\n nodeList: galleryNodeList\r\n };\r\n data[selector] = selectorData;\r\n\r\n [].forEach.call(galleryNodeList, function(galleryElement) {\r\n if (userOptions && userOptions.filter) {\r\n regex = userOptions.filter;\r\n }\r\n\r\n // Get nodes from gallery elements or single-element galleries\r\n var tagsNodeList = [];\r\n if (galleryElement.tagName === 'A') {\r\n tagsNodeList = [galleryElement];\r\n } else {\r\n tagsNodeList = galleryElement.getElementsByTagName('a');\r\n }\r\n\r\n // Filter 'a' elements from those not linking to images\r\n tagsNodeList = [].filter.call(tagsNodeList, function(element) {\r\n return regex.test(element.href);\r\n });\r\n if (tagsNodeList.length === 0) {\r\n return;\r\n }\r\n\r\n var gallery = [];\r\n [].forEach.call(tagsNodeList, function(imageElement, imageIndex) {\r\n var imageElementClickHandler = function(event) {\r\n event.preventDefault ? event.preventDefault() : event.returnValue = false; // jshint ignore:line\r\n prepareOverlay(gallery, userOptions);\r\n showOverlay(imageIndex);\r\n };\r\n var imageItem = {\r\n eventHandler: imageElementClickHandler,\r\n imageElement: imageElement\r\n };\r\n bind(imageElement, 'click', imageElementClickHandler);\r\n gallery.push(imageItem);\r\n });\r\n selectorData.galleries.push(gallery);\r\n });\r\n }\r\n\r\n function clearCachedData() {\r\n for (var selector in data) {\r\n if (data.hasOwnProperty(selector)) {\r\n removeFromCache(selector);\r\n }\r\n }\r\n }\r\n\r\n function removeFromCache(selector) {\r\n if (!data.hasOwnProperty(selector)) {\r\n return;\r\n }\r\n var galleries = data[selector].galleries;\r\n [].forEach.call(galleries, function(gallery) {\r\n [].forEach.call(gallery, function(imageItem) {\r\n unbind(imageItem.imageElement, 'click', imageItem.eventHandler);\r\n });\r\n\r\n if (currentGallery === gallery) {\r\n currentGallery = [];\r\n }\r\n });\r\n\r\n delete data[selector];\r\n }\r\n\r\n function buildOverlay() {\r\n overlay = getByID('baguetteBox-overlay');\r\n // Check if the overlay already exists\r\n if (overlay) {\r\n slider = getByID('baguetteBox-slider');\r\n previousButton = getByID('previous-button');\r\n nextButton = getByID('next-button');\r\n closeButton = getByID('close-button');\r\n return;\r\n }\r\n // Create overlay element\r\n overlay = create('div');\r\n overlay.setAttribute('role', 'dialog');\r\n overlay.id = 'baguetteBox-overlay';\r\n document.getElementsByTagName('body')[0].appendChild(overlay);\r\n // Create gallery slider element\r\n slider = create('div');\r\n slider.id = 'baguetteBox-slider';\r\n overlay.appendChild(slider);\r\n // Create all necessary buttons\r\n previousButton = create('button');\r\n previousButton.setAttribute('type', 'button');\r\n previousButton.id = 'previous-button';\r\n previousButton.setAttribute('aria-label', 'Previous');\r\n previousButton.innerHTML = supports.svg ? leftArrow : '<';\r\n overlay.appendChild(previousButton);\r\n\r\n nextButton = create('button');\r\n nextButton.setAttribute('type', 'button');\r\n nextButton.id = 'next-button';\r\n nextButton.setAttribute('aria-label', 'Next');\r\n nextButton.innerHTML = supports.svg ? rightArrow : '>';\r\n overlay.appendChild(nextButton);\r\n\r\n closeButton = create('button');\r\n closeButton.setAttribute('type', 'button');\r\n closeButton.id = 'close-button';\r\n closeButton.setAttribute('aria-label', 'Close');\r\n closeButton.innerHTML = supports.svg ? closeX : '×';\r\n overlay.appendChild(closeButton);\r\n\r\n previousButton.className = nextButton.className = closeButton.className = 'baguetteBox-button';\r\n\r\n bindEvents();\r\n }\r\n\r\n function keyDownHandler(event) {\r\n switch (event.keyCode) {\r\n case 37: // Left arrow\r\n showPreviousImage();\r\n break;\r\n case 39: // Right arrow\r\n showNextImage();\r\n break;\r\n case 27: // Esc\r\n hideOverlay();\r\n break;\r\n }\r\n }\r\n\r\n function bindEvents() {\r\n bind(overlay, 'click', overlayClickHandler);\r\n bind(previousButton, 'click', previousButtonClickHandler);\r\n bind(nextButton, 'click', nextButtonClickHandler);\r\n bind(closeButton, 'click', closeButtonClickHandler);\r\n bind(overlay, 'touchstart', touchstartHandler);\r\n bind(overlay, 'touchmove', touchmoveHandler);\r\n bind(overlay, 'touchend', touchendHandler);\r\n bind(document, 'focus', trapFocusInsideOverlay, true);\r\n }\r\n\r\n function unbindEvents() {\r\n unbind(overlay, 'click', overlayClickHandler);\r\n unbind(previousButton, 'click', previousButtonClickHandler);\r\n unbind(nextButton, 'click', nextButtonClickHandler);\r\n unbind(closeButton, 'click', closeButtonClickHandler);\r\n unbind(overlay, 'touchstart', touchstartHandler);\r\n unbind(overlay, 'touchmove', touchmoveHandler);\r\n unbind(overlay, 'touchend', touchendHandler);\r\n unbind(document, 'focus', trapFocusInsideOverlay, true);\r\n }\r\n\r\n function prepareOverlay(gallery, userOptions) {\r\n // If the same gallery is being opened prevent from loading it once again\r\n if (currentGallery === gallery) {\r\n return;\r\n }\r\n currentGallery = gallery;\r\n // Update gallery specific options\r\n setOptions(userOptions);\r\n // Empty slider of previous contents (more effective than .innerHTML = \"\")\r\n while (slider.firstChild) {\r\n slider.removeChild(slider.firstChild);\r\n }\r\n imagesElements.length = 0;\r\n\r\n var imagesFiguresIds = [];\r\n var imagesCaptionsIds = [];\r\n // Prepare and append images containers and populate figure and captions IDs arrays\r\n for (var i = 0, fullImage; i < gallery.length; i++) {\r\n fullImage = create('div');\r\n fullImage.className = 'full-image';\r\n fullImage.id = 'baguette-img-' + i;\r\n imagesElements.push(fullImage);\r\n\r\n imagesFiguresIds.push('baguetteBox-figure-' + i);\r\n imagesCaptionsIds.push('baguetteBox-figcaption-' + i);\r\n slider.appendChild(imagesElements[i]);\r\n }\r\n overlay.setAttribute('aria-labelledby', imagesFiguresIds.join(' '));\r\n overlay.setAttribute('aria-describedby', imagesCaptionsIds.join(' '));\r\n }\r\n\r\n function setOptions(newOptions) {\r\n if (!newOptions) {\r\n newOptions = {};\r\n }\r\n // Fill options object\r\n for (var item in defaults) {\r\n options[item] = defaults[item];\r\n if (typeof newOptions[item] !== 'undefined') {\r\n options[item] = newOptions[item];\r\n }\r\n }\r\n /* Apply new options */\r\n // Change transition for proper animation\r\n slider.style.transition = slider.style.webkitTransition = (options.animation === 'fadeIn' ? 'opacity .4s ease' :\r\n options.animation === 'slideIn' ? '' : 'none');\r\n // Hide buttons if necessary\r\n if (options.buttons === 'auto' && ('ontouchstart' in window || currentGallery.length === 1)) {\r\n options.buttons = false;\r\n }\r\n // Set buttons style to hide or display them\r\n previousButton.style.display = nextButton.style.display = (options.buttons ? '' : 'none');\r\n // Set overlay color\r\n try {\r\n overlay.style.backgroundColor = options.overlayBackgroundColor;\r\n } catch (e) {}\r\n }\r\n\r\n function showOverlay(chosenImageIndex) {\r\n if (options.noScrollbars) {\r\n document.documentElement.style.overflowY = 'hidden';\r\n document.body.style.overflowY = 'scroll';\r\n }\r\n if (overlay.style.display === 'block') {\r\n return;\r\n }\r\n\r\n bind(document, 'keydown', keyDownHandler);\r\n currentIndex = chosenImageIndex;\r\n touch = {\r\n count: 0,\r\n startX: null,\r\n startY: null\r\n };\r\n loadImage(currentIndex, function() {\r\n preloadNext(currentIndex);\r\n preloadPrev(currentIndex);\r\n });\r\n\r\n updateOffset();\r\n overlay.style.display = 'block';\r\n if (options.fullScreen) {\r\n enterFullScreen();\r\n }\r\n // Fade in overlay\r\n setTimeout(function() {\r\n overlay.className = 'visible';\r\n if (options.afterShow) {\r\n options.afterShow();\r\n }\r\n }, 50);\r\n if (options.onChange) {\r\n options.onChange(currentIndex, imagesElements.length);\r\n }\r\n documentLastFocus = document.activeElement;\r\n initFocus();\r\n }\r\n\r\n function initFocus() {\r\n if (options.buttons) {\r\n previousButton.focus();\r\n } else {\r\n closeButton.focus();\r\n }\r\n }\r\n\r\n function enterFullScreen() {\r\n if (overlay.requestFullscreen) {\r\n overlay.requestFullscreen();\r\n } else if (overlay.webkitRequestFullscreen) {\r\n overlay.webkitRequestFullscreen();\r\n } else if (overlay.mozRequestFullScreen) {\r\n overlay.mozRequestFullScreen();\r\n }\r\n }\r\n\r\n function exitFullscreen() {\r\n if (document.exitFullscreen) {\r\n document.exitFullscreen();\r\n } else if (document.mozCancelFullScreen) {\r\n document.mozCancelFullScreen();\r\n } else if (document.webkitExitFullscreen) {\r\n document.webkitExitFullscreen();\r\n }\r\n }\r\n\r\n function hideOverlay() {\r\n if (options.noScrollbars) {\r\n document.documentElement.style.overflowY = 'auto';\r\n document.body.style.overflowY = 'auto';\r\n }\r\n if (overlay.style.display === 'none') {\r\n return;\r\n }\r\n\r\n unbind(document, 'keydown', keyDownHandler);\r\n // Fade out and hide the overlay\r\n overlay.className = '';\r\n setTimeout(function() {\r\n overlay.style.display = 'none';\r\n exitFullscreen();\r\n if (options.afterHide) {\r\n options.afterHide();\r\n }\r\n }, 500);\r\n documentLastFocus.focus();\r\n }\r\n\r\n function loadImage(index, callback) {\r\n var imageContainer = imagesElements[index];\r\n if (typeof imageContainer === 'undefined') {\r\n return;\r\n }\r\n\r\n // If image is already loaded run callback and return\r\n if (imageContainer.getElementsByTagName('img')[0]) {\r\n if (callback) {\r\n callback();\r\n }\r\n return;\r\n }\r\n\r\n // Get element reference, optional caption and source path\r\n var imageElement = currentGallery[index].imageElement;\r\n var thumbnailElement = imageElement.getElementsByTagName('img')[0];\r\n var imageCaption = typeof options.captions === 'function' ?\r\n options.captions.call(currentGallery, imageElement) :\r\n imageElement.getAttribute('data-caption') || imageElement.title;\r\n var imageSrc = getImageSrc(imageElement);\r\n\r\n // Prepare figure element\r\n var figure = create('figure');\r\n figure.id = 'baguetteBox-figure-' + index;\r\n figure.innerHTML = '' +\r\n '
' +\r\n '
' +\r\n '