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-rw-r--r--static/viewerjs/dist/viewer.common.js3235
-rw-r--r--static/viewerjs/dist/viewer.css446
-rw-r--r--static/viewerjs/dist/viewer.esm.js3233
-rw-r--r--static/viewerjs/dist/viewer.js3241
-rw-r--r--static/viewerjs/dist/viewer.min.css9
-rw-r--r--static/viewerjs/dist/viewer.min.js10
6 files changed, 10174 insertions, 0 deletions
diff --git a/static/viewerjs/dist/viewer.common.js b/static/viewerjs/dist/viewer.common.js
new file mode 100644
index 0000000..321fb2c
--- /dev/null
+++ b/static/viewerjs/dist/viewer.common.js
@@ -0,0 +1,3235 @@
+/*!
+ * Viewer.js v1.11.2
+ * https://fengyuanchen.github.io/viewerjs
+ *
+ * Copyright 2015-present Chen Fengyuan
+ * Released under the MIT license
+ *
+ * Date: 2023-01-01T10:14:49.638Z
+ */
+
+'use strict';
+
+function ownKeys(object, enumerableOnly) {
+ var keys = Object.keys(object);
+ if (Object.getOwnPropertySymbols) {
+ var symbols = Object.getOwnPropertySymbols(object);
+ enumerableOnly && (symbols = symbols.filter(function (sym) {
+ return Object.getOwnPropertyDescriptor(object, sym).enumerable;
+ })), keys.push.apply(keys, symbols);
+ }
+ return keys;
+}
+function _objectSpread2(target) {
+ for (var i = 1; i < arguments.length; i++) {
+ var source = null != arguments[i] ? arguments[i] : {};
+ i % 2 ? ownKeys(Object(source), !0).forEach(function (key) {
+ _defineProperty(target, key, source[key]);
+ }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) {
+ Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
+ });
+ }
+ return target;
+}
+function _typeof(obj) {
+ "@babel/helpers - typeof";
+
+ return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
+ return typeof obj;
+ } : function (obj) {
+ return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+ }, _typeof(obj);
+}
+function _classCallCheck(instance, Constructor) {
+ if (!(instance instanceof Constructor)) {
+ throw new TypeError("Cannot call a class as a function");
+ }
+}
+function _defineProperties(target, props) {
+ for (var i = 0; i < props.length; i++) {
+ var descriptor = props[i];
+ descriptor.enumerable = descriptor.enumerable || false;
+ descriptor.configurable = true;
+ if ("value" in descriptor) descriptor.writable = true;
+ Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor);
+ }
+}
+function _createClass(Constructor, protoProps, staticProps) {
+ if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+ if (staticProps) _defineProperties(Constructor, staticProps);
+ Object.defineProperty(Constructor, "prototype", {
+ writable: false
+ });
+ return Constructor;
+}
+function _defineProperty(obj, key, value) {
+ key = _toPropertyKey(key);
+ if (key in obj) {
+ Object.defineProperty(obj, key, {
+ value: value,
+ enumerable: true,
+ configurable: true,
+ writable: true
+ });
+ } else {
+ obj[key] = value;
+ }
+ return obj;
+}
+function _toPrimitive(input, hint) {
+ if (typeof input !== "object" || input === null) return input;
+ var prim = input[Symbol.toPrimitive];
+ if (prim !== undefined) {
+ var res = prim.call(input, hint || "default");
+ if (typeof res !== "object") return res;
+ throw new TypeError("@@toPrimitive must return a primitive value.");
+ }
+ return (hint === "string" ? String : Number)(input);
+}
+function _toPropertyKey(arg) {
+ var key = _toPrimitive(arg, "string");
+ return typeof key === "symbol" ? key : String(key);
+}
+
+var DEFAULTS = {
+ /**
+ * Enable a modal backdrop, specify `static` for a backdrop
+ * which doesn't close the modal on click.
+ * @type {boolean}
+ */
+ backdrop: true,
+ /**
+ * Show the button on the top-right of the viewer.
+ * @type {boolean}
+ */
+ button: true,
+ /**
+ * Show the navbar.
+ * @type {boolean | number}
+ */
+ navbar: true,
+ /**
+ * Specify the visibility and the content of the title.
+ * @type {boolean | number | Function | Array}
+ */
+ title: true,
+ /**
+ * Show the toolbar.
+ * @type {boolean | number | Object}
+ */
+ toolbar: true,
+ /**
+ * Custom class name(s) to add to the viewer's root element.
+ * @type {string}
+ */
+ className: '',
+ /**
+ * Define where to put the viewer in modal mode.
+ * @type {string | Element}
+ */
+ container: 'body',
+ /**
+ * Filter the images for viewing. Return true if the image is viewable.
+ * @type {Function}
+ */
+ filter: null,
+ /**
+ * Enable to request fullscreen when play.
+ * {@link https://developer.mozilla.org/en-US/docs/Web/API/FullscreenOptions}
+ * @type {boolean|FullscreenOptions}
+ */
+ fullscreen: true,
+ /**
+ * Define the extra attributes to inherit from the original image.
+ * @type {Array}
+ */
+ inheritedAttributes: ['crossOrigin', 'decoding', 'isMap', 'loading', 'referrerPolicy', 'sizes', 'srcset', 'useMap'],
+ /**
+ * Define the initial coverage of the viewing image.
+ * @type {number}
+ */
+ initialCoverage: 0.9,
+ /**
+ * Define the initial index of the image for viewing.
+ * @type {number}
+ */
+ initialViewIndex: 0,
+ /**
+ * Enable inline mode.
+ * @type {boolean}
+ */
+ inline: false,
+ /**
+ * The amount of time to delay between automatically cycling an image when playing.
+ * @type {number}
+ */
+ interval: 5000,
+ /**
+ * Enable keyboard support.
+ * @type {boolean}
+ */
+ keyboard: true,
+ /**
+ * Focus the viewer when initialized.
+ * @type {boolean}
+ */
+ focus: true,
+ /**
+ * Indicate if show a loading spinner when load image or not.
+ * @type {boolean}
+ */
+ loading: true,
+ /**
+ * Indicate if enable loop viewing or not.
+ * @type {boolean}
+ */
+ loop: true,
+ /**
+ * Min width of the viewer in inline mode.
+ * @type {number}
+ */
+ minWidth: 200,
+ /**
+ * Min height of the viewer in inline mode.
+ * @type {number}
+ */
+ minHeight: 100,
+ /**
+ * Enable to move the image.
+ * @type {boolean}
+ */
+ movable: true,
+ /**
+ * Enable to rotate the image.
+ * @type {boolean}
+ */
+ rotatable: true,
+ /**
+ * Enable to scale the image.
+ * @type {boolean}
+ */
+ scalable: true,
+ /**
+ * Enable to zoom the image.
+ * @type {boolean}
+ */
+ zoomable: true,
+ /**
+ * Enable to zoom the current image by dragging on the touch screen.
+ * @type {boolean}
+ */
+ zoomOnTouch: true,
+ /**
+ * Enable to zoom the image by wheeling mouse.
+ * @type {boolean}
+ */
+ zoomOnWheel: true,
+ /**
+ * Enable to slide to the next or previous image by swiping on the touch screen.
+ * @type {boolean}
+ */
+ slideOnTouch: true,
+ /**
+ * Indicate if toggle the image size between its natural size
+ * and initial size when double click on the image or not.
+ * @type {boolean}
+ */
+ toggleOnDblclick: true,
+ /**
+ * Show the tooltip with image ratio (percentage) when zoom in or zoom out.
+ * @type {boolean}
+ */
+ tooltip: true,
+ /**
+ * Enable CSS3 Transition for some special elements.
+ * @type {boolean}
+ */
+ transition: true,
+ /**
+ * Define the CSS `z-index` value of viewer in modal mode.
+ * @type {number}
+ */
+ zIndex: 2015,
+ /**
+ * Define the CSS `z-index` value of viewer in inline mode.
+ * @type {number}
+ */
+ zIndexInline: 0,
+ /**
+ * Define the ratio when zoom the image by wheeling mouse.
+ * @type {number}
+ */
+ zoomRatio: 0.1,
+ /**
+ * Define the min ratio of the image when zoom out.
+ * @type {number}
+ */
+ minZoomRatio: 0.01,
+ /**
+ * Define the max ratio of the image when zoom in.
+ * @type {number}
+ */
+ maxZoomRatio: 100,
+ /**
+ * Define where to get the original image URL for viewing.
+ * @type {string | Function}
+ */
+ url: 'src',
+ /**
+ * Event shortcuts.
+ * @type {Function}
+ */
+ ready: null,
+ show: null,
+ shown: null,
+ hide: null,
+ hidden: null,
+ view: null,
+ viewed: null,
+ move: null,
+ moved: null,
+ rotate: null,
+ rotated: null,
+ scale: null,
+ scaled: null,
+ zoom: null,
+ zoomed: null,
+ play: null,
+ stop: null
+};
+
+var TEMPLATE = '<div class="viewer-container" tabindex="-1" touch-action="none">' + '<div class="viewer-canvas"></div>' + '<div class="viewer-footer">' + '<div class="viewer-title"></div>' + '<div class="viewer-toolbar"></div>' + '<div class="viewer-navbar">' + '<ul class="viewer-list" role="navigation"></ul>' + '</div>' + '</div>' + '<div class="viewer-tooltip" role="alert" aria-hidden="true"></div>' + '<div class="viewer-button" data-viewer-action="mix" role="button"></div>' + '<div class="viewer-player"></div>' + '</div>';
+
+var IS_BROWSER = typeof window !== 'undefined' && typeof window.document !== 'undefined';
+var WINDOW = IS_BROWSER ? window : {};
+var IS_TOUCH_DEVICE = IS_BROWSER && WINDOW.document.documentElement ? 'ontouchstart' in WINDOW.document.documentElement : false;
+var HAS_POINTER_EVENT = IS_BROWSER ? 'PointerEvent' in WINDOW : false;
+var NAMESPACE = 'viewer';
+
+// Actions
+var ACTION_MOVE = 'move';
+var ACTION_SWITCH = 'switch';
+var ACTION_ZOOM = 'zoom';
+
+// Classes
+var CLASS_ACTIVE = "".concat(NAMESPACE, "-active");
+var CLASS_CLOSE = "".concat(NAMESPACE, "-close");
+var CLASS_FADE = "".concat(NAMESPACE, "-fade");
+var CLASS_FIXED = "".concat(NAMESPACE, "-fixed");
+var CLASS_FULLSCREEN = "".concat(NAMESPACE, "-fullscreen");
+var CLASS_FULLSCREEN_EXIT = "".concat(NAMESPACE, "-fullscreen-exit");
+var CLASS_HIDE = "".concat(NAMESPACE, "-hide");
+var CLASS_HIDE_MD_DOWN = "".concat(NAMESPACE, "-hide-md-down");
+var CLASS_HIDE_SM_DOWN = "".concat(NAMESPACE, "-hide-sm-down");
+var CLASS_HIDE_XS_DOWN = "".concat(NAMESPACE, "-hide-xs-down");
+var CLASS_IN = "".concat(NAMESPACE, "-in");
+var CLASS_INVISIBLE = "".concat(NAMESPACE, "-invisible");
+var CLASS_LOADING = "".concat(NAMESPACE, "-loading");
+var CLASS_MOVE = "".concat(NAMESPACE, "-move");
+var CLASS_OPEN = "".concat(NAMESPACE, "-open");
+var CLASS_SHOW = "".concat(NAMESPACE, "-show");
+var CLASS_TRANSITION = "".concat(NAMESPACE, "-transition");
+
+// Native events
+var EVENT_CLICK = 'click';
+var EVENT_DBLCLICK = 'dblclick';
+var EVENT_DRAG_START = 'dragstart';
+var EVENT_FOCUSIN = 'focusin';
+var EVENT_KEY_DOWN = 'keydown';
+var EVENT_LOAD = 'load';
+var EVENT_ERROR = 'error';
+var EVENT_TOUCH_END = IS_TOUCH_DEVICE ? 'touchend touchcancel' : 'mouseup';
+var EVENT_TOUCH_MOVE = IS_TOUCH_DEVICE ? 'touchmove' : 'mousemove';
+var EVENT_TOUCH_START = IS_TOUCH_DEVICE ? 'touchstart' : 'mousedown';
+var EVENT_POINTER_DOWN = HAS_POINTER_EVENT ? 'pointerdown' : EVENT_TOUCH_START;
+var EVENT_POINTER_MOVE = HAS_POINTER_EVENT ? 'pointermove' : EVENT_TOUCH_MOVE;
+var EVENT_POINTER_UP = HAS_POINTER_EVENT ? 'pointerup pointercancel' : EVENT_TOUCH_END;
+var EVENT_RESIZE = 'resize';
+var EVENT_TRANSITION_END = 'transitionend';
+var EVENT_WHEEL = 'wheel';
+
+// Custom events
+var EVENT_READY = 'ready';
+var EVENT_SHOW = 'show';
+var EVENT_SHOWN = 'shown';
+var EVENT_HIDE = 'hide';
+var EVENT_HIDDEN = 'hidden';
+var EVENT_VIEW = 'view';
+var EVENT_VIEWED = 'viewed';
+var EVENT_MOVE = 'move';
+var EVENT_MOVED = 'moved';
+var EVENT_ROTATE = 'rotate';
+var EVENT_ROTATED = 'rotated';
+var EVENT_SCALE = 'scale';
+var EVENT_SCALED = 'scaled';
+var EVENT_ZOOM = 'zoom';
+var EVENT_ZOOMED = 'zoomed';
+var EVENT_PLAY = 'play';
+var EVENT_STOP = 'stop';
+
+// Data keys
+var DATA_ACTION = "".concat(NAMESPACE, "Action");
+
+// RegExps
+var REGEXP_SPACES = /\s\s*/;
+
+// Misc
+var BUTTONS = ['zoom-in', 'zoom-out', 'one-to-one', 'reset', 'prev', 'play', 'next', 'rotate-left', 'rotate-right', 'flip-horizontal', 'flip-vertical'];
+
+/**
+ * Check if the given value is a string.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a string, else `false`.
+ */
+function isString(value) {
+ return typeof value === 'string';
+}
+
+/**
+ * Check if the given value is not a number.
+ */
+var isNaN = Number.isNaN || WINDOW.isNaN;
+
+/**
+ * Check if the given value is a number.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a number, else `false`.
+ */
+function isNumber(value) {
+ return typeof value === 'number' && !isNaN(value);
+}
+
+/**
+ * Check if the given value is undefined.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is undefined, else `false`.
+ */
+function isUndefined(value) {
+ return typeof value === 'undefined';
+}
+
+/**
+ * Check if the given value is an object.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is an object, else `false`.
+ */
+function isObject(value) {
+ return _typeof(value) === 'object' && value !== null;
+}
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+/**
+ * Check if the given value is a plain object.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a plain object, else `false`.
+ */
+function isPlainObject(value) {
+ if (!isObject(value)) {
+ return false;
+ }
+ try {
+ var _constructor = value.constructor;
+ var prototype = _constructor.prototype;
+ return _constructor && prototype && hasOwnProperty.call(prototype, 'isPrototypeOf');
+ } catch (error) {
+ return false;
+ }
+}
+
+/**
+ * Check if the given value is a function.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a function, else `false`.
+ */
+function isFunction(value) {
+ return typeof value === 'function';
+}
+
+/**
+ * Iterate the given data.
+ * @param {*} data - The data to iterate.
+ * @param {Function} callback - The process function for each element.
+ * @returns {*} The original data.
+ */
+function forEach(data, callback) {
+ if (data && isFunction(callback)) {
+ if (Array.isArray(data) || isNumber(data.length) /* array-like */) {
+ var length = data.length;
+ var i;
+ for (i = 0; i < length; i += 1) {
+ if (callback.call(data, data[i], i, data) === false) {
+ break;
+ }
+ }
+ } else if (isObject(data)) {
+ Object.keys(data).forEach(function (key) {
+ callback.call(data, data[key], key, data);
+ });
+ }
+ }
+ return data;
+}
+
+/**
+ * Extend the given object.
+ * @param {*} obj - The object to be extended.
+ * @param {*} args - The rest objects which will be merged to the first object.
+ * @returns {Object} The extended object.
+ */
+var assign = Object.assign || function assign(obj) {
+ for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+ args[_key - 1] = arguments[_key];
+ }
+ if (isObject(obj) && args.length > 0) {
+ args.forEach(function (arg) {
+ if (isObject(arg)) {
+ Object.keys(arg).forEach(function (key) {
+ obj[key] = arg[key];
+ });
+ }
+ });
+ }
+ return obj;
+};
+var REGEXP_SUFFIX = /^(?:width|height|left|top|marginLeft|marginTop)$/;
+
+/**
+ * Apply styles to the given element.
+ * @param {Element} element - The target element.
+ * @param {Object} styles - The styles for applying.
+ */
+function setStyle(element, styles) {
+ var style = element.style;
+ forEach(styles, function (value, property) {
+ if (REGEXP_SUFFIX.test(property) && isNumber(value)) {
+ value += 'px';
+ }
+ style[property] = value;
+ });
+}
+
+/**
+ * Escape a string for using in HTML.
+ * @param {String} value - The string to escape.
+ * @returns {String} Returns the escaped string.
+ */
+function escapeHTMLEntities(value) {
+ return isString(value) ? value.replace(/&(?!amp;|quot;|#39;|lt;|gt;)/g, '&amp;').replace(/"/g, '&quot;').replace(/'/g, '&#39;').replace(/</g, '&lt;').replace(/>/g, '&gt;') : value;
+}
+
+/**
+ * Check if the given element has a special class.
+ * @param {Element} element - The element to check.
+ * @param {string} value - The class to search.
+ * @returns {boolean} Returns `true` if the special class was found.
+ */
+function hasClass(element, value) {
+ if (!element || !value) {
+ return false;
+ }
+ return element.classList ? element.classList.contains(value) : element.className.indexOf(value) > -1;
+}
+
+/**
+ * Add classes to the given element.
+ * @param {Element} element - The target element.
+ * @param {string} value - The classes to be added.
+ */
+function addClass(element, value) {
+ if (!element || !value) {
+ return;
+ }
+ if (isNumber(element.length)) {
+ forEach(element, function (elem) {
+ addClass(elem, value);
+ });
+ return;
+ }
+ if (element.classList) {
+ element.classList.add(value);
+ return;
+ }
+ var className = element.className.trim();
+ if (!className) {
+ element.className = value;
+ } else if (className.indexOf(value) < 0) {
+ element.className = "".concat(className, " ").concat(value);
+ }
+}
+
+/**
+ * Remove classes from the given element.
+ * @param {Element} element - The target element.
+ * @param {string} value - The classes to be removed.
+ */
+function removeClass(element, value) {
+ if (!element || !value) {
+ return;
+ }
+ if (isNumber(element.length)) {
+ forEach(element, function (elem) {
+ removeClass(elem, value);
+ });
+ return;
+ }
+ if (element.classList) {
+ element.classList.remove(value);
+ return;
+ }
+ if (element.className.indexOf(value) >= 0) {
+ element.className = element.className.replace(value, '');
+ }
+}
+
+/**
+ * Add or remove classes from the given element.
+ * @param {Element} element - The target element.
+ * @param {string} value - The classes to be toggled.
+ * @param {boolean} added - Add only.
+ */
+function toggleClass(element, value, added) {
+ if (!value) {
+ return;
+ }
+ if (isNumber(element.length)) {
+ forEach(element, function (elem) {
+ toggleClass(elem, value, added);
+ });
+ return;
+ }
+
+ // IE10-11 doesn't support the second parameter of `classList.toggle`
+ if (added) {
+ addClass(element, value);
+ } else {
+ removeClass(element, value);
+ }
+}
+var REGEXP_HYPHENATE = /([a-z\d])([A-Z])/g;
+
+/**
+ * Transform the given string from camelCase to kebab-case
+ * @param {string} value - The value to transform.
+ * @returns {string} The transformed value.
+ */
+function hyphenate(value) {
+ return value.replace(REGEXP_HYPHENATE, '$1-$2').toLowerCase();
+}
+
+/**
+ * Get data from the given element.
+ * @param {Element} element - The target element.
+ * @param {string} name - The data key to get.
+ * @returns {string} The data value.
+ */
+function getData(element, name) {
+ if (isObject(element[name])) {
+ return element[name];
+ }
+ if (element.dataset) {
+ return element.dataset[name];
+ }
+ return element.getAttribute("data-".concat(hyphenate(name)));
+}
+
+/**
+ * Set data to the given element.
+ * @param {Element} element - The target element.
+ * @param {string} name - The data key to set.
+ * @param {string} data - The data value.
+ */
+function setData(element, name, data) {
+ if (isObject(data)) {
+ element[name] = data;
+ } else if (element.dataset) {
+ element.dataset[name] = data;
+ } else {
+ element.setAttribute("data-".concat(hyphenate(name)), data);
+ }
+}
+var onceSupported = function () {
+ var supported = false;
+ if (IS_BROWSER) {
+ var once = false;
+ var listener = function listener() {};
+ var options = Object.defineProperty({}, 'once', {
+ get: function get() {
+ supported = true;
+ return once;
+ },
+ /**
+ * This setter can fix a `TypeError` in strict mode
+ * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Getter_only}
+ * @param {boolean} value - The value to set
+ */
+ set: function set(value) {
+ once = value;
+ }
+ });
+ WINDOW.addEventListener('test', listener, options);
+ WINDOW.removeEventListener('test', listener, options);
+ }
+ return supported;
+}();
+
+/**
+ * Remove event listener from the target element.
+ * @param {Element} element - The event target.
+ * @param {string} type - The event type(s).
+ * @param {Function} listener - The event listener.
+ * @param {Object} options - The event options.
+ */
+function removeListener(element, type, listener) {
+ var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
+ var handler = listener;
+ type.trim().split(REGEXP_SPACES).forEach(function (event) {
+ if (!onceSupported) {
+ var listeners = element.listeners;
+ if (listeners && listeners[event] && listeners[event][listener]) {
+ handler = listeners[event][listener];
+ delete listeners[event][listener];
+ if (Object.keys(listeners[event]).length === 0) {
+ delete listeners[event];
+ }
+ if (Object.keys(listeners).length === 0) {
+ delete element.listeners;
+ }
+ }
+ }
+ element.removeEventListener(event, handler, options);
+ });
+}
+
+/**
+ * Add event listener to the target element.
+ * @param {Element} element - The event target.
+ * @param {string} type - The event type(s).
+ * @param {Function} listener - The event listener.
+ * @param {Object} options - The event options.
+ */
+function addListener(element, type, listener) {
+ var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
+ var _handler = listener;
+ type.trim().split(REGEXP_SPACES).forEach(function (event) {
+ if (options.once && !onceSupported) {
+ var _element$listeners = element.listeners,
+ listeners = _element$listeners === void 0 ? {} : _element$listeners;
+ _handler = function handler() {
+ delete listeners[event][listener];
+ element.removeEventListener(event, _handler, options);
+ for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+ args[_key2] = arguments[_key2];
+ }
+ listener.apply(element, args);
+ };
+ if (!listeners[event]) {
+ listeners[event] = {};
+ }
+ if (listeners[event][listener]) {
+ element.removeEventListener(event, listeners[event][listener], options);
+ }
+ listeners[event][listener] = _handler;
+ element.listeners = listeners;
+ }
+ element.addEventListener(event, _handler, options);
+ });
+}
+
+/**
+ * Dispatch event on the target element.
+ * @param {Element} element - The event target.
+ * @param {string} type - The event type(s).
+ * @param {Object} data - The additional event data.
+ * @param {Object} options - The additional event options.
+ * @returns {boolean} Indicate if the event is default prevented or not.
+ */
+function dispatchEvent(element, type, data, options) {
+ var event;
+
+ // Event and CustomEvent on IE9-11 are global objects, not constructors
+ if (isFunction(Event) && isFunction(CustomEvent)) {
+ event = new CustomEvent(type, _objectSpread2({
+ bubbles: true,
+ cancelable: true,
+ detail: data
+ }, options));
+ } else {
+ event = document.createEvent('CustomEvent');
+ event.initCustomEvent(type, true, true, data);
+ }
+ return element.dispatchEvent(event);
+}
+
+/**
+ * Get the offset base on the document.
+ * @param {Element} element - The target element.
+ * @returns {Object} The offset data.
+ */
+function getOffset(element) {
+ var box = element.getBoundingClientRect();
+ return {
+ left: box.left + (window.pageXOffset - document.documentElement.clientLeft),
+ top: box.top + (window.pageYOffset - document.documentElement.clientTop)
+ };
+}
+
+/**
+ * Get transforms base on the given object.
+ * @param {Object} obj - The target object.
+ * @returns {string} A string contains transform values.
+ */
+function getTransforms(_ref) {
+ var rotate = _ref.rotate,
+ scaleX = _ref.scaleX,
+ scaleY = _ref.scaleY,
+ translateX = _ref.translateX,
+ translateY = _ref.translateY;
+ var values = [];
+ if (isNumber(translateX) && translateX !== 0) {
+ values.push("translateX(".concat(translateX, "px)"));
+ }
+ if (isNumber(translateY) && translateY !== 0) {
+ values.push("translateY(".concat(translateY, "px)"));
+ }
+
+ // Rotate should come first before scale to match orientation transform
+ if (isNumber(rotate) && rotate !== 0) {
+ values.push("rotate(".concat(rotate, "deg)"));
+ }
+ if (isNumber(scaleX) && scaleX !== 1) {
+ values.push("scaleX(".concat(scaleX, ")"));
+ }
+ if (isNumber(scaleY) && scaleY !== 1) {
+ values.push("scaleY(".concat(scaleY, ")"));
+ }
+ var transform = values.length ? values.join(' ') : 'none';
+ return {
+ WebkitTransform: transform,
+ msTransform: transform,
+ transform: transform
+ };
+}
+
+/**
+ * Get an image name from an image url.
+ * @param {string} url - The target url.
+ * @example
+ * // picture.jpg
+ * getImageNameFromURL('https://domain.com/path/to/picture.jpg?size=1280×960')
+ * @returns {string} A string contains the image name.
+ */
+function getImageNameFromURL(url) {
+ return isString(url) ? decodeURIComponent(url.replace(/^.*\//, '').replace(/[?&#].*$/, '')) : '';
+}
+var IS_SAFARI = WINDOW.navigator && /(Macintosh|iPhone|iPod|iPad).*AppleWebKit/i.test(WINDOW.navigator.userAgent);
+
+/**
+ * Get an image's natural sizes.
+ * @param {string} image - The target image.
+ * @param {Object} options - The viewer options.
+ * @param {Function} callback - The callback function.
+ * @returns {HTMLImageElement} The new image.
+ */
+function getImageNaturalSizes(image, options, callback) {
+ var newImage = document.createElement('img');
+
+ // Modern browsers (except Safari)
+ if (image.naturalWidth && !IS_SAFARI) {
+ callback(image.naturalWidth, image.naturalHeight);
+ return newImage;
+ }
+ var body = document.body || document.documentElement;
+ newImage.onload = function () {
+ callback(newImage.width, newImage.height);
+ if (!IS_SAFARI) {
+ body.removeChild(newImage);
+ }
+ };
+ forEach(options.inheritedAttributes, function (name) {
+ var value = image.getAttribute(name);
+ if (value !== null) {
+ newImage.setAttribute(name, value);
+ }
+ });
+ newImage.src = image.src;
+
+ // iOS Safari will convert the image automatically
+ // with its orientation once append it into DOM
+ if (!IS_SAFARI) {
+ newImage.style.cssText = 'left:0;' + 'max-height:none!important;' + 'max-width:none!important;' + 'min-height:0!important;' + 'min-width:0!important;' + 'opacity:0;' + 'position:absolute;' + 'top:0;' + 'z-index:-1;';
+ body.appendChild(newImage);
+ }
+ return newImage;
+}
+
+/**
+ * Get the related class name of a responsive type number.
+ * @param {string} type - The responsive type.
+ * @returns {string} The related class name.
+ */
+function getResponsiveClass(type) {
+ switch (type) {
+ case 2:
+ return CLASS_HIDE_XS_DOWN;
+ case 3:
+ return CLASS_HIDE_SM_DOWN;
+ case 4:
+ return CLASS_HIDE_MD_DOWN;
+ default:
+ return '';
+ }
+}
+
+/**
+ * Get the max ratio of a group of pointers.
+ * @param {string} pointers - The target pointers.
+ * @returns {number} The result ratio.
+ */
+function getMaxZoomRatio(pointers) {
+ var pointers2 = _objectSpread2({}, pointers);
+ var ratios = [];
+ forEach(pointers, function (pointer, pointerId) {
+ delete pointers2[pointerId];
+ forEach(pointers2, function (pointer2) {
+ var x1 = Math.abs(pointer.startX - pointer2.startX);
+ var y1 = Math.abs(pointer.startY - pointer2.startY);
+ var x2 = Math.abs(pointer.endX - pointer2.endX);
+ var y2 = Math.abs(pointer.endY - pointer2.endY);
+ var z1 = Math.sqrt(x1 * x1 + y1 * y1);
+ var z2 = Math.sqrt(x2 * x2 + y2 * y2);
+ var ratio = (z2 - z1) / z1;
+ ratios.push(ratio);
+ });
+ });
+ ratios.sort(function (a, b) {
+ return Math.abs(a) < Math.abs(b);
+ });
+ return ratios[0];
+}
+
+/**
+ * Get a pointer from an event object.
+ * @param {Object} event - The target event object.
+ * @param {boolean} endOnly - Indicates if only returns the end point coordinate or not.
+ * @returns {Object} The result pointer contains start and/or end point coordinates.
+ */
+function getPointer(_ref2, endOnly) {
+ var pageX = _ref2.pageX,
+ pageY = _ref2.pageY;
+ var end = {
+ endX: pageX,
+ endY: pageY
+ };
+ return endOnly ? end : _objectSpread2({
+ timeStamp: Date.now(),
+ startX: pageX,
+ startY: pageY
+ }, end);
+}
+
+/**
+ * Get the center point coordinate of a group of pointers.
+ * @param {Object} pointers - The target pointers.
+ * @returns {Object} The center point coordinate.
+ */
+function getPointersCenter(pointers) {
+ var pageX = 0;
+ var pageY = 0;
+ var count = 0;
+ forEach(pointers, function (_ref3) {
+ var startX = _ref3.startX,
+ startY = _ref3.startY;
+ pageX += startX;
+ pageY += startY;
+ count += 1;
+ });
+ pageX /= count;
+ pageY /= count;
+ return {
+ pageX: pageX,
+ pageY: pageY
+ };
+}
+
+var render = {
+ render: function render() {
+ this.initContainer();
+ this.initViewer();
+ this.initList();
+ this.renderViewer();
+ },
+ initBody: function initBody() {
+ var ownerDocument = this.element.ownerDocument;
+ var body = ownerDocument.body || ownerDocument.documentElement;
+ this.body = body;
+ this.scrollbarWidth = window.innerWidth - ownerDocument.documentElement.clientWidth;
+ this.initialBodyPaddingRight = body.style.paddingRight;
+ this.initialBodyComputedPaddingRight = window.getComputedStyle(body).paddingRight;
+ },
+ initContainer: function initContainer() {
+ this.containerData = {
+ width: window.innerWidth,
+ height: window.innerHeight
+ };
+ },
+ initViewer: function initViewer() {
+ var options = this.options,
+ parent = this.parent;
+ var viewerData;
+ if (options.inline) {
+ viewerData = {
+ width: Math.max(parent.offsetWidth, options.minWidth),
+ height: Math.max(parent.offsetHeight, options.minHeight)
+ };
+ this.parentData = viewerData;
+ }
+ if (this.fulled || !viewerData) {
+ viewerData = this.containerData;
+ }
+ this.viewerData = assign({}, viewerData);
+ },
+ renderViewer: function renderViewer() {
+ if (this.options.inline && !this.fulled) {
+ setStyle(this.viewer, this.viewerData);
+ }
+ },
+ initList: function initList() {
+ var _this = this;
+ var element = this.element,
+ options = this.options,
+ list = this.list;
+ var items = [];
+
+ // initList may be called in this.update, so should keep idempotent
+ list.innerHTML = '';
+ forEach(this.images, function (image, index) {
+ var src = image.src;
+ var alt = image.alt || getImageNameFromURL(src);
+ var url = _this.getImageURL(image);
+ if (src || url) {
+ var item = document.createElement('li');
+ var img = document.createElement('img');
+ forEach(options.inheritedAttributes, function (name) {
+ var value = image.getAttribute(name);
+ if (value !== null) {
+ img.setAttribute(name, value);
+ }
+ });
+ if (options.navbar) {
+ img.src = src || url;
+ }
+ img.alt = alt;
+ img.setAttribute('data-original-url', url || src);
+ item.setAttribute('data-index', index);
+ item.setAttribute('data-viewer-action', 'view');
+ item.setAttribute('role', 'button');
+ if (options.keyboard) {
+ item.setAttribute('tabindex', 0);
+ }
+ item.appendChild(img);
+ list.appendChild(item);
+ items.push(item);
+ }
+ });
+ this.items = items;
+ forEach(items, function (item) {
+ var image = item.firstElementChild;
+ var onLoad;
+ var onError;
+ setData(image, 'filled', true);
+ if (options.loading) {
+ addClass(item, CLASS_LOADING);
+ }
+ addListener(image, EVENT_LOAD, onLoad = function onLoad(event) {
+ removeListener(image, EVENT_ERROR, onError);
+ if (options.loading) {
+ removeClass(item, CLASS_LOADING);
+ }
+ _this.loadImage(event);
+ }, {
+ once: true
+ });
+ addListener(image, EVENT_ERROR, onError = function onError() {
+ removeListener(image, EVENT_LOAD, onLoad);
+ if (options.loading) {
+ removeClass(item, CLASS_LOADING);
+ }
+ }, {
+ once: true
+ });
+ });
+ if (options.transition) {
+ addListener(element, EVENT_VIEWED, function () {
+ addClass(list, CLASS_TRANSITION);
+ }, {
+ once: true
+ });
+ }
+ },
+ renderList: function renderList() {
+ var index = this.index;
+ var item = this.items[index];
+ if (!item) {
+ return;
+ }
+ var next = item.nextElementSibling;
+ var gutter = parseInt(window.getComputedStyle(next || item).marginLeft, 10);
+ var offsetWidth = item.offsetWidth;
+ var outerWidth = offsetWidth + gutter;
+
+ // Place the active item in the center of the screen
+ setStyle(this.list, assign({
+ width: outerWidth * this.length - gutter
+ }, getTransforms({
+ translateX: (this.viewerData.width - offsetWidth) / 2 - outerWidth * index
+ })));
+ },
+ resetList: function resetList() {
+ var list = this.list;
+ list.innerHTML = '';
+ removeClass(list, CLASS_TRANSITION);
+ setStyle(list, getTransforms({
+ translateX: 0
+ }));
+ },
+ initImage: function initImage(done) {
+ var _this2 = this;
+ var options = this.options,
+ image = this.image,
+ viewerData = this.viewerData;
+ var footerHeight = this.footer.offsetHeight;
+ var viewerWidth = viewerData.width;
+ var viewerHeight = Math.max(viewerData.height - footerHeight, footerHeight);
+ var oldImageData = this.imageData || {};
+ var sizingImage;
+ this.imageInitializing = {
+ abort: function abort() {
+ sizingImage.onload = null;
+ }
+ };
+ sizingImage = getImageNaturalSizes(image, options, function (naturalWidth, naturalHeight) {
+ var aspectRatio = naturalWidth / naturalHeight;
+ var initialCoverage = Math.max(0, Math.min(1, options.initialCoverage));
+ var width = viewerWidth;
+ var height = viewerHeight;
+ _this2.imageInitializing = false;
+ if (viewerHeight * aspectRatio > viewerWidth) {
+ height = viewerWidth / aspectRatio;
+ } else {
+ width = viewerHeight * aspectRatio;
+ }
+ initialCoverage = isNumber(initialCoverage) ? initialCoverage : 0.9;
+ width = Math.min(width * initialCoverage, naturalWidth);
+ height = Math.min(height * initialCoverage, naturalHeight);
+ var left = (viewerWidth - width) / 2;
+ var top = (viewerHeight - height) / 2;
+ var imageData = {
+ left: left,
+ top: top,
+ x: left,
+ y: top,
+ width: width,
+ height: height,
+ oldRatio: 1,
+ ratio: width / naturalWidth,
+ aspectRatio: aspectRatio,
+ naturalWidth: naturalWidth,
+ naturalHeight: naturalHeight
+ };
+ var initialImageData = assign({}, imageData);
+ if (options.rotatable) {
+ imageData.rotate = oldImageData.rotate || 0;
+ initialImageData.rotate = 0;
+ }
+ if (options.scalable) {
+ imageData.scaleX = oldImageData.scaleX || 1;
+ imageData.scaleY = oldImageData.scaleY || 1;
+ initialImageData.scaleX = 1;
+ initialImageData.scaleY = 1;
+ }
+ _this2.imageData = imageData;
+ _this2.initialImageData = initialImageData;
+ if (done) {
+ done();
+ }
+ });
+ },
+ renderImage: function renderImage(done) {
+ var _this3 = this;
+ var image = this.image,
+ imageData = this.imageData;
+ setStyle(image, assign({
+ width: imageData.width,
+ height: imageData.height,
+ // XXX: Not to use translateX/Y to avoid image shaking when zooming
+ marginLeft: imageData.x,
+ marginTop: imageData.y
+ }, getTransforms(imageData)));
+ if (done) {
+ if ((this.viewing || this.moving || this.rotating || this.scaling || this.zooming) && this.options.transition && hasClass(image, CLASS_TRANSITION)) {
+ var onTransitionEnd = function onTransitionEnd() {
+ _this3.imageRendering = false;
+ done();
+ };
+ this.imageRendering = {
+ abort: function abort() {
+ removeListener(image, EVENT_TRANSITION_END, onTransitionEnd);
+ }
+ };
+ addListener(image, EVENT_TRANSITION_END, onTransitionEnd, {
+ once: true
+ });
+ } else {
+ done();
+ }
+ }
+ },
+ resetImage: function resetImage() {
+ // this.image only defined after viewed
+ if (this.viewing || this.viewed) {
+ var image = this.image;
+ if (this.viewing) {
+ this.viewing.abort();
+ }
+ image.parentNode.removeChild(image);
+ this.image = null;
+ }
+ }
+};
+
+var events = {
+ bind: function bind() {
+ var options = this.options,
+ viewer = this.viewer,
+ canvas = this.canvas;
+ var document = this.element.ownerDocument;
+ addListener(viewer, EVENT_CLICK, this.onClick = this.click.bind(this));
+ addListener(viewer, EVENT_DRAG_START, this.onDragStart = this.dragstart.bind(this));
+ addListener(canvas, EVENT_POINTER_DOWN, this.onPointerDown = this.pointerdown.bind(this));
+ addListener(document, EVENT_POINTER_MOVE, this.onPointerMove = this.pointermove.bind(this));
+ addListener(document, EVENT_POINTER_UP, this.onPointerUp = this.pointerup.bind(this));
+ addListener(document, EVENT_KEY_DOWN, this.onKeyDown = this.keydown.bind(this));
+ addListener(window, EVENT_RESIZE, this.onResize = this.resize.bind(this));
+ if (options.zoomable && options.zoomOnWheel) {
+ addListener(viewer, EVENT_WHEEL, this.onWheel = this.wheel.bind(this), {
+ passive: false,
+ capture: true
+ });
+ }
+ if (options.toggleOnDblclick) {
+ addListener(canvas, EVENT_DBLCLICK, this.onDblclick = this.dblclick.bind(this));
+ }
+ },
+ unbind: function unbind() {
+ var options = this.options,
+ viewer = this.viewer,
+ canvas = this.canvas;
+ var document = this.element.ownerDocument;
+ removeListener(viewer, EVENT_CLICK, this.onClick);
+ removeListener(viewer, EVENT_DRAG_START, this.onDragStart);
+ removeListener(canvas, EVENT_POINTER_DOWN, this.onPointerDown);
+ removeListener(document, EVENT_POINTER_MOVE, this.onPointerMove);
+ removeListener(document, EVENT_POINTER_UP, this.onPointerUp);
+ removeListener(document, EVENT_KEY_DOWN, this.onKeyDown);
+ removeListener(window, EVENT_RESIZE, this.onResize);
+ if (options.zoomable && options.zoomOnWheel) {
+ removeListener(viewer, EVENT_WHEEL, this.onWheel, {
+ passive: false,
+ capture: true
+ });
+ }
+ if (options.toggleOnDblclick) {
+ removeListener(canvas, EVENT_DBLCLICK, this.onDblclick);
+ }
+ }
+};
+
+var handlers = {
+ click: function click(event) {
+ var options = this.options,
+ imageData = this.imageData;
+ var target = event.target;
+ var action = getData(target, DATA_ACTION);
+ if (!action && target.localName === 'img' && target.parentElement.localName === 'li') {
+ target = target.parentElement;
+ action = getData(target, DATA_ACTION);
+ }
+
+ // Cancel the emulated click when the native click event was triggered.
+ if (IS_TOUCH_DEVICE && event.isTrusted && target === this.canvas) {
+ clearTimeout(this.clickCanvasTimeout);
+ }
+ switch (action) {
+ case 'mix':
+ if (this.played) {
+ this.stop();
+ } else if (options.inline) {
+ if (this.fulled) {
+ this.exit();
+ } else {
+ this.full();
+ }
+ } else {
+ this.hide();
+ }
+ break;
+ case 'hide':
+ if (!this.pointerMoved) {
+ this.hide();
+ }
+ break;
+ case 'view':
+ this.view(getData(target, 'index'));
+ break;
+ case 'zoom-in':
+ this.zoom(0.1, true);
+ break;
+ case 'zoom-out':
+ this.zoom(-0.1, true);
+ break;
+ case 'one-to-one':
+ this.toggle();
+ break;
+ case 'reset':
+ this.reset();
+ break;
+ case 'prev':
+ this.prev(options.loop);
+ break;
+ case 'play':
+ this.play(options.fullscreen);
+ break;
+ case 'next':
+ this.next(options.loop);
+ break;
+ case 'rotate-left':
+ this.rotate(-90);
+ break;
+ case 'rotate-right':
+ this.rotate(90);
+ break;
+ case 'flip-horizontal':
+ this.scaleX(-imageData.scaleX || -1);
+ break;
+ case 'flip-vertical':
+ this.scaleY(-imageData.scaleY || -1);
+ break;
+ default:
+ if (this.played) {
+ this.stop();
+ }
+ }
+ },
+ dblclick: function dblclick(event) {
+ event.preventDefault();
+ if (this.viewed && event.target === this.image) {
+ // Cancel the emulated double click when the native dblclick event was triggered.
+ if (IS_TOUCH_DEVICE && event.isTrusted) {
+ clearTimeout(this.doubleClickImageTimeout);
+ }
+
+ // XXX: No pageX/Y properties in custom event, fallback to the original event.
+ this.toggle(event.isTrusted ? event : event.detail && event.detail.originalEvent);
+ }
+ },
+ load: function load() {
+ var _this = this;
+ if (this.timeout) {
+ clearTimeout(this.timeout);
+ this.timeout = false;
+ }
+ var element = this.element,
+ options = this.options,
+ image = this.image,
+ index = this.index,
+ viewerData = this.viewerData;
+ removeClass(image, CLASS_INVISIBLE);
+ if (options.loading) {
+ removeClass(this.canvas, CLASS_LOADING);
+ }
+ image.style.cssText = 'height:0;' + "margin-left:".concat(viewerData.width / 2, "px;") + "margin-top:".concat(viewerData.height / 2, "px;") + 'max-width:none!important;' + 'position:relative;' + 'width:0;';
+ this.initImage(function () {
+ toggleClass(image, CLASS_MOVE, options.movable);
+ toggleClass(image, CLASS_TRANSITION, options.transition);
+ _this.renderImage(function () {
+ _this.viewed = true;
+ _this.viewing = false;
+ if (isFunction(options.viewed)) {
+ addListener(element, EVENT_VIEWED, options.viewed, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_VIEWED, {
+ originalImage: _this.images[index],
+ index: index,
+ image: image
+ }, {
+ cancelable: false
+ });
+ });
+ });
+ },
+ loadImage: function loadImage(event) {
+ var image = event.target;
+ var parent = image.parentNode;
+ var parentWidth = parent.offsetWidth || 30;
+ var parentHeight = parent.offsetHeight || 50;
+ var filled = !!getData(image, 'filled');
+ getImageNaturalSizes(image, this.options, function (naturalWidth, naturalHeight) {
+ var aspectRatio = naturalWidth / naturalHeight;
+ var width = parentWidth;
+ var height = parentHeight;
+ if (parentHeight * aspectRatio > parentWidth) {
+ if (filled) {
+ width = parentHeight * aspectRatio;
+ } else {
+ height = parentWidth / aspectRatio;
+ }
+ } else if (filled) {
+ height = parentWidth / aspectRatio;
+ } else {
+ width = parentHeight * aspectRatio;
+ }
+ setStyle(image, assign({
+ width: width,
+ height: height
+ }, getTransforms({
+ translateX: (parentWidth - width) / 2,
+ translateY: (parentHeight - height) / 2
+ })));
+ });
+ },
+ keydown: function keydown(event) {
+ var options = this.options;
+ if (!options.keyboard) {
+ return;
+ }
+ var keyCode = event.keyCode || event.which || event.charCode;
+ switch (keyCode) {
+ // Enter
+ case 13:
+ if (this.viewer.contains(event.target)) {
+ this.click(event);
+ }
+ break;
+ }
+ if (!this.fulled) {
+ return;
+ }
+ switch (keyCode) {
+ // Escape
+ case 27:
+ if (this.played) {
+ this.stop();
+ } else if (options.inline) {
+ if (this.fulled) {
+ this.exit();
+ }
+ } else {
+ this.hide();
+ }
+ break;
+
+ // Space
+ case 32:
+ if (this.played) {
+ this.stop();
+ }
+ break;
+
+ // ArrowLeft
+ case 37:
+ if (this.played && this.playing) {
+ this.playing.prev();
+ } else {
+ this.prev(options.loop);
+ }
+ break;
+
+ // ArrowUp
+ case 38:
+ // Prevent scroll on Firefox
+ event.preventDefault();
+
+ // Zoom in
+ this.zoom(options.zoomRatio, true);
+ break;
+
+ // ArrowRight
+ case 39:
+ if (this.played && this.playing) {
+ this.playing.next();
+ } else {
+ this.next(options.loop);
+ }
+ break;
+
+ // ArrowDown
+ case 40:
+ // Prevent scroll on Firefox
+ event.preventDefault();
+
+ // Zoom out
+ this.zoom(-options.zoomRatio, true);
+ break;
+
+ // Ctrl + 0
+ case 48:
+ // Fall through
+
+ // Ctrl + 1
+ // eslint-disable-next-line no-fallthrough
+ case 49:
+ if (event.ctrlKey) {
+ event.preventDefault();
+ this.toggle();
+ }
+ break;
+ }
+ },
+ dragstart: function dragstart(event) {
+ if (event.target.localName === 'img') {
+ event.preventDefault();
+ }
+ },
+ pointerdown: function pointerdown(event) {
+ var options = this.options,
+ pointers = this.pointers;
+ var buttons = event.buttons,
+ button = event.button;
+ this.pointerMoved = false;
+ if (!this.viewed || this.showing || this.viewing || this.hiding
+
+ // Handle mouse event and pointer event and ignore touch event
+ || (event.type === 'mousedown' || event.type === 'pointerdown' && event.pointerType === 'mouse') && (
+ // No primary button (Usually the left button)
+ isNumber(buttons) && buttons !== 1 || isNumber(button) && button !== 0
+
+ // Open context menu
+ || event.ctrlKey)) {
+ return;
+ }
+
+ // Prevent default behaviours as page zooming in touch devices.
+ event.preventDefault();
+ if (event.changedTouches) {
+ forEach(event.changedTouches, function (touch) {
+ pointers[touch.identifier] = getPointer(touch);
+ });
+ } else {
+ pointers[event.pointerId || 0] = getPointer(event);
+ }
+ var action = options.movable ? ACTION_MOVE : false;
+ if (options.zoomOnTouch && options.zoomable && Object.keys(pointers).length > 1) {
+ action = ACTION_ZOOM;
+ } else if (options.slideOnTouch && (event.pointerType === 'touch' || event.type === 'touchstart') && this.isSwitchable()) {
+ action = ACTION_SWITCH;
+ }
+ if (options.transition && (action === ACTION_MOVE || action === ACTION_ZOOM)) {
+ removeClass(this.image, CLASS_TRANSITION);
+ }
+ this.action = action;
+ },
+ pointermove: function pointermove(event) {
+ var pointers = this.pointers,
+ action = this.action;
+ if (!this.viewed || !action) {
+ return;
+ }
+ event.preventDefault();
+ this.pointerMoved = true;
+ if (event.changedTouches) {
+ forEach(event.changedTouches, function (touch) {
+ assign(pointers[touch.identifier] || {}, getPointer(touch, true));
+ });
+ } else {
+ assign(pointers[event.pointerId || 0] || {}, getPointer(event, true));
+ }
+ this.change(event);
+ },
+ pointerup: function pointerup(event) {
+ var _this2 = this;
+ var options = this.options,
+ action = this.action,
+ pointers = this.pointers;
+ var pointer;
+ if (event.changedTouches) {
+ forEach(event.changedTouches, function (touch) {
+ pointer = pointers[touch.identifier];
+ delete pointers[touch.identifier];
+ });
+ } else {
+ pointer = pointers[event.pointerId || 0];
+ delete pointers[event.pointerId || 0];
+ }
+ if (!action) {
+ return;
+ }
+ event.preventDefault();
+ if (options.transition && (action === ACTION_MOVE || action === ACTION_ZOOM)) {
+ addClass(this.image, CLASS_TRANSITION);
+ }
+ this.action = false;
+
+ // Emulate click and double click in touch devices to support backdrop and image zooming (#210).
+ if (IS_TOUCH_DEVICE && action !== ACTION_ZOOM && pointer && Date.now() - pointer.timeStamp < 500) {
+ clearTimeout(this.clickCanvasTimeout);
+ clearTimeout(this.doubleClickImageTimeout);
+ if (options.toggleOnDblclick && this.viewed && event.target === this.image) {
+ if (this.imageClicked) {
+ this.imageClicked = false;
+
+ // This timeout will be cleared later when a native dblclick event is triggering
+ this.doubleClickImageTimeout = setTimeout(function () {
+ dispatchEvent(_this2.image, EVENT_DBLCLICK, {
+ originalEvent: event
+ });
+ }, 50);
+ } else {
+ this.imageClicked = true;
+
+ // The default timing of a double click in Windows is 500 ms
+ this.doubleClickImageTimeout = setTimeout(function () {
+ _this2.imageClicked = false;
+ }, 500);
+ }
+ } else {
+ this.imageClicked = false;
+ if (options.backdrop && options.backdrop !== 'static' && event.target === this.canvas) {
+ // This timeout will be cleared later when a native click event is triggering
+ this.clickCanvasTimeout = setTimeout(function () {
+ dispatchEvent(_this2.canvas, EVENT_CLICK, {
+ originalEvent: event
+ });
+ }, 50);
+ }
+ }
+ }
+ },
+ resize: function resize() {
+ var _this3 = this;
+ if (!this.isShown || this.hiding) {
+ return;
+ }
+ if (this.fulled) {
+ this.close();
+ this.initBody();
+ this.open();
+ }
+ this.initContainer();
+ this.initViewer();
+ this.renderViewer();
+ this.renderList();
+ if (this.viewed) {
+ this.initImage(function () {
+ _this3.renderImage();
+ });
+ }
+ if (this.played) {
+ if (this.options.fullscreen && this.fulled && !(document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement)) {
+ this.stop();
+ return;
+ }
+ forEach(this.player.getElementsByTagName('img'), function (image) {
+ addListener(image, EVENT_LOAD, _this3.loadImage.bind(_this3), {
+ once: true
+ });
+ dispatchEvent(image, EVENT_LOAD);
+ });
+ }
+ },
+ wheel: function wheel(event) {
+ var _this4 = this;
+ if (!this.viewed) {
+ return;
+ }
+ event.preventDefault();
+
+ // Limit wheel speed to prevent zoom too fast
+ if (this.wheeling) {
+ return;
+ }
+ this.wheeling = true;
+ setTimeout(function () {
+ _this4.wheeling = false;
+ }, 50);
+ var ratio = Number(this.options.zoomRatio) || 0.1;
+ var delta = 1;
+ if (event.deltaY) {
+ delta = event.deltaY > 0 ? 1 : -1;
+ } else if (event.wheelDelta) {
+ delta = -event.wheelDelta / 120;
+ } else if (event.detail) {
+ delta = event.detail > 0 ? 1 : -1;
+ }
+ this.zoom(-delta * ratio, true, null, event);
+ }
+};
+
+var methods = {
+ /** Show the viewer (only available in modal mode)
+ * @param {boolean} [immediate=false] - Indicates if show the viewer immediately or not.
+ * @returns {Viewer} this
+ */
+ show: function show() {
+ var immediate = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var element = this.element,
+ options = this.options;
+ if (options.inline || this.showing || this.isShown || this.showing) {
+ return this;
+ }
+ if (!this.ready) {
+ this.build();
+ if (this.ready) {
+ this.show(immediate);
+ }
+ return this;
+ }
+ if (isFunction(options.show)) {
+ addListener(element, EVENT_SHOW, options.show, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_SHOW) === false || !this.ready) {
+ return this;
+ }
+ if (this.hiding) {
+ this.transitioning.abort();
+ }
+ this.showing = true;
+ this.open();
+ var viewer = this.viewer;
+ removeClass(viewer, CLASS_HIDE);
+ viewer.setAttribute('role', 'dialog');
+ viewer.setAttribute('aria-labelledby', this.title.id);
+ viewer.setAttribute('aria-modal', true);
+ viewer.removeAttribute('aria-hidden');
+ if (options.transition && !immediate) {
+ var shown = this.shown.bind(this);
+ this.transitioning = {
+ abort: function abort() {
+ removeListener(viewer, EVENT_TRANSITION_END, shown);
+ removeClass(viewer, CLASS_IN);
+ }
+ };
+ addClass(viewer, CLASS_TRANSITION);
+
+ // Force reflow to enable CSS3 transition
+ viewer.initialOffsetWidth = viewer.offsetWidth;
+ addListener(viewer, EVENT_TRANSITION_END, shown, {
+ once: true
+ });
+ addClass(viewer, CLASS_IN);
+ } else {
+ addClass(viewer, CLASS_IN);
+ this.shown();
+ }
+ return this;
+ },
+ /**
+ * Hide the viewer (only available in modal mode)
+ * @param {boolean} [immediate=false] - Indicates if hide the viewer immediately or not.
+ * @returns {Viewer} this
+ */
+ hide: function hide() {
+ var _this = this;
+ var immediate = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var element = this.element,
+ options = this.options;
+ if (options.inline || this.hiding || !(this.isShown || this.showing)) {
+ return this;
+ }
+ if (isFunction(options.hide)) {
+ addListener(element, EVENT_HIDE, options.hide, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_HIDE) === false) {
+ return this;
+ }
+ if (this.showing) {
+ this.transitioning.abort();
+ }
+ this.hiding = true;
+ if (this.played) {
+ this.stop();
+ } else if (this.viewing) {
+ this.viewing.abort();
+ }
+ var viewer = this.viewer,
+ image = this.image;
+ var hideImmediately = function hideImmediately() {
+ removeClass(viewer, CLASS_IN);
+ _this.hidden();
+ };
+ if (options.transition && !immediate) {
+ var onViewerTransitionEnd = function onViewerTransitionEnd(event) {
+ // Ignore all propagating `transitionend` events (#275).
+ if (event && event.target === viewer) {
+ removeListener(viewer, EVENT_TRANSITION_END, onViewerTransitionEnd);
+ _this.hidden();
+ }
+ };
+ var onImageTransitionEnd = function onImageTransitionEnd() {
+ // In case of show the viewer by `viewer.show(true)` previously (#407).
+ if (hasClass(viewer, CLASS_TRANSITION)) {
+ addListener(viewer, EVENT_TRANSITION_END, onViewerTransitionEnd);
+ removeClass(viewer, CLASS_IN);
+ } else {
+ hideImmediately();
+ }
+ };
+ this.transitioning = {
+ abort: function abort() {
+ if (_this.viewed && hasClass(image, CLASS_TRANSITION)) {
+ removeListener(image, EVENT_TRANSITION_END, onImageTransitionEnd);
+ } else if (hasClass(viewer, CLASS_TRANSITION)) {
+ removeListener(viewer, EVENT_TRANSITION_END, onViewerTransitionEnd);
+ }
+ }
+ };
+
+ // In case of hiding the viewer when holding on the image (#255),
+ // note that the `CLASS_TRANSITION` class will be removed on pointer down.
+ if (this.viewed && hasClass(image, CLASS_TRANSITION)) {
+ addListener(image, EVENT_TRANSITION_END, onImageTransitionEnd, {
+ once: true
+ });
+ this.zoomTo(0, false, null, null, true);
+ } else {
+ onImageTransitionEnd();
+ }
+ } else {
+ hideImmediately();
+ }
+ return this;
+ },
+ /**
+ * View one of the images with image's index
+ * @param {number} index - The index of the image to view.
+ * @returns {Viewer} this
+ */
+ view: function view() {
+ var _this2 = this;
+ var index = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.options.initialViewIndex;
+ index = Number(index) || 0;
+ if (this.hiding || this.played || index < 0 || index >= this.length || this.viewed && index === this.index) {
+ return this;
+ }
+ if (!this.isShown) {
+ this.index = index;
+ return this.show();
+ }
+ if (this.viewing) {
+ this.viewing.abort();
+ }
+ var element = this.element,
+ options = this.options,
+ title = this.title,
+ canvas = this.canvas;
+ var item = this.items[index];
+ var img = item.querySelector('img');
+ var url = getData(img, 'originalUrl');
+ var alt = img.getAttribute('alt');
+ var image = document.createElement('img');
+ forEach(options.inheritedAttributes, function (name) {
+ var value = img.getAttribute(name);
+ if (value !== null) {
+ image.setAttribute(name, value);
+ }
+ });
+ image.src = url;
+ image.alt = alt;
+ if (isFunction(options.view)) {
+ addListener(element, EVENT_VIEW, options.view, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_VIEW, {
+ originalImage: this.images[index],
+ index: index,
+ image: image
+ }) === false || !this.isShown || this.hiding || this.played) {
+ return this;
+ }
+ var activeItem = this.items[this.index];
+ if (activeItem) {
+ removeClass(activeItem, CLASS_ACTIVE);
+ activeItem.removeAttribute('aria-selected');
+ }
+ addClass(item, CLASS_ACTIVE);
+ item.setAttribute('aria-selected', true);
+ if (options.focus) {
+ item.focus();
+ }
+ this.image = image;
+ this.viewed = false;
+ this.index = index;
+ this.imageData = {};
+ addClass(image, CLASS_INVISIBLE);
+ if (options.loading) {
+ addClass(canvas, CLASS_LOADING);
+ }
+ canvas.innerHTML = '';
+ canvas.appendChild(image);
+
+ // Center current item
+ this.renderList();
+
+ // Clear title
+ title.innerHTML = '';
+
+ // Generate title after viewed
+ var onViewed = function onViewed() {
+ var imageData = _this2.imageData;
+ var render = Array.isArray(options.title) ? options.title[1] : options.title;
+ title.innerHTML = escapeHTMLEntities(isFunction(render) ? render.call(_this2, image, imageData) : "".concat(alt, " (").concat(imageData.naturalWidth, " \xD7 ").concat(imageData.naturalHeight, ")"));
+ };
+ var onLoad;
+ var onError;
+ addListener(element, EVENT_VIEWED, onViewed, {
+ once: true
+ });
+ this.viewing = {
+ abort: function abort() {
+ removeListener(element, EVENT_VIEWED, onViewed);
+ if (image.complete) {
+ if (_this2.imageRendering) {
+ _this2.imageRendering.abort();
+ } else if (_this2.imageInitializing) {
+ _this2.imageInitializing.abort();
+ }
+ } else {
+ // Cancel download to save bandwidth.
+ image.src = '';
+ removeListener(image, EVENT_LOAD, onLoad);
+ if (_this2.timeout) {
+ clearTimeout(_this2.timeout);
+ }
+ }
+ }
+ };
+ if (image.complete) {
+ this.load();
+ } else {
+ addListener(image, EVENT_LOAD, onLoad = function onLoad() {
+ removeListener(image, EVENT_ERROR, onError);
+ _this2.load();
+ }, {
+ once: true
+ });
+ addListener(image, EVENT_ERROR, onError = function onError() {
+ removeListener(image, EVENT_LOAD, onLoad);
+ if (_this2.timeout) {
+ clearTimeout(_this2.timeout);
+ _this2.timeout = false;
+ }
+ removeClass(image, CLASS_INVISIBLE);
+ if (options.loading) {
+ removeClass(_this2.canvas, CLASS_LOADING);
+ }
+ }, {
+ once: true
+ });
+ if (this.timeout) {
+ clearTimeout(this.timeout);
+ }
+
+ // Make the image visible if it fails to load within 1s
+ this.timeout = setTimeout(function () {
+ removeClass(image, CLASS_INVISIBLE);
+ _this2.timeout = false;
+ }, 1000);
+ }
+ return this;
+ },
+ /**
+ * View the previous image
+ * @param {boolean} [loop=false] - Indicate if view the last one
+ * when it is the first one at present.
+ * @returns {Viewer} this
+ */
+ prev: function prev() {
+ var loop = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var index = this.index - 1;
+ if (index < 0) {
+ index = loop ? this.length - 1 : 0;
+ }
+ this.view(index);
+ return this;
+ },
+ /**
+ * View the next image
+ * @param {boolean} [loop=false] - Indicate if view the first one
+ * when it is the last one at present.
+ * @returns {Viewer} this
+ */
+ next: function next() {
+ var loop = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var maxIndex = this.length - 1;
+ var index = this.index + 1;
+ if (index > maxIndex) {
+ index = loop ? 0 : maxIndex;
+ }
+ this.view(index);
+ return this;
+ },
+ /**
+ * Move the image with relative offsets.
+ * @param {number} x - The moving distance in the horizontal direction.
+ * @param {number} [y=x] The moving distance in the vertical direction.
+ * @returns {Viewer} this
+ */
+ move: function move(x) {
+ var y = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : x;
+ var imageData = this.imageData;
+ this.moveTo(isUndefined(x) ? x : imageData.x + Number(x), isUndefined(y) ? y : imageData.y + Number(y));
+ return this;
+ },
+ /**
+ * Move the image to an absolute point.
+ * @param {number} x - The new position in the horizontal direction.
+ * @param {number} [y=x] - The new position in the vertical direction.
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @returns {Viewer} this
+ */
+ moveTo: function moveTo(x) {
+ var _this3 = this;
+ var y = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : x;
+ var _originalEvent = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
+ var element = this.element,
+ options = this.options,
+ imageData = this.imageData;
+ x = Number(x);
+ y = Number(y);
+ if (this.viewed && !this.played && options.movable) {
+ var oldX = imageData.x;
+ var oldY = imageData.y;
+ var changed = false;
+ if (isNumber(x)) {
+ changed = true;
+ } else {
+ x = oldX;
+ }
+ if (isNumber(y)) {
+ changed = true;
+ } else {
+ y = oldY;
+ }
+ if (changed) {
+ if (isFunction(options.move)) {
+ addListener(element, EVENT_MOVE, options.move, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_MOVE, {
+ x: x,
+ y: y,
+ oldX: oldX,
+ oldY: oldY,
+ originalEvent: _originalEvent
+ }) === false) {
+ return this;
+ }
+ imageData.x = x;
+ imageData.y = y;
+ imageData.left = x;
+ imageData.top = y;
+ this.moving = true;
+ this.renderImage(function () {
+ _this3.moving = false;
+ if (isFunction(options.moved)) {
+ addListener(element, EVENT_MOVED, options.moved, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_MOVED, {
+ x: x,
+ y: y,
+ oldX: oldX,
+ oldY: oldY,
+ originalEvent: _originalEvent
+ }, {
+ cancelable: false
+ });
+ });
+ }
+ }
+ return this;
+ },
+ /**
+ * Rotate the image with a relative degree.
+ * @param {number} degree - The rotate degree.
+ * @returns {Viewer} this
+ */
+ rotate: function rotate(degree) {
+ this.rotateTo((this.imageData.rotate || 0) + Number(degree));
+ return this;
+ },
+ /**
+ * Rotate the image to an absolute degree.
+ * @param {number} degree - The rotate degree.
+ * @returns {Viewer} this
+ */
+ rotateTo: function rotateTo(degree) {
+ var _this4 = this;
+ var element = this.element,
+ options = this.options,
+ imageData = this.imageData;
+ degree = Number(degree);
+ if (isNumber(degree) && this.viewed && !this.played && options.rotatable) {
+ var oldDegree = imageData.rotate;
+ if (isFunction(options.rotate)) {
+ addListener(element, EVENT_ROTATE, options.rotate, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_ROTATE, {
+ degree: degree,
+ oldDegree: oldDegree
+ }) === false) {
+ return this;
+ }
+ imageData.rotate = degree;
+ this.rotating = true;
+ this.renderImage(function () {
+ _this4.rotating = false;
+ if (isFunction(options.rotated)) {
+ addListener(element, EVENT_ROTATED, options.rotated, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_ROTATED, {
+ degree: degree,
+ oldDegree: oldDegree
+ }, {
+ cancelable: false
+ });
+ });
+ }
+ return this;
+ },
+ /**
+ * Scale the image on the x-axis.
+ * @param {number} scaleX - The scale ratio on the x-axis.
+ * @returns {Viewer} this
+ */
+ scaleX: function scaleX(_scaleX) {
+ this.scale(_scaleX, this.imageData.scaleY);
+ return this;
+ },
+ /**
+ * Scale the image on the y-axis.
+ * @param {number} scaleY - The scale ratio on the y-axis.
+ * @returns {Viewer} this
+ */
+ scaleY: function scaleY(_scaleY) {
+ this.scale(this.imageData.scaleX, _scaleY);
+ return this;
+ },
+ /**
+ * Scale the image.
+ * @param {number} scaleX - The scale ratio on the x-axis.
+ * @param {number} [scaleY=scaleX] - The scale ratio on the y-axis.
+ * @returns {Viewer} this
+ */
+ scale: function scale(scaleX) {
+ var _this5 = this;
+ var scaleY = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : scaleX;
+ var element = this.element,
+ options = this.options,
+ imageData = this.imageData;
+ scaleX = Number(scaleX);
+ scaleY = Number(scaleY);
+ if (this.viewed && !this.played && options.scalable) {
+ var oldScaleX = imageData.scaleX;
+ var oldScaleY = imageData.scaleY;
+ var changed = false;
+ if (isNumber(scaleX)) {
+ changed = true;
+ } else {
+ scaleX = oldScaleX;
+ }
+ if (isNumber(scaleY)) {
+ changed = true;
+ } else {
+ scaleY = oldScaleY;
+ }
+ if (changed) {
+ if (isFunction(options.scale)) {
+ addListener(element, EVENT_SCALE, options.scale, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_SCALE, {
+ scaleX: scaleX,
+ scaleY: scaleY,
+ oldScaleX: oldScaleX,
+ oldScaleY: oldScaleY
+ }) === false) {
+ return this;
+ }
+ imageData.scaleX = scaleX;
+ imageData.scaleY = scaleY;
+ this.scaling = true;
+ this.renderImage(function () {
+ _this5.scaling = false;
+ if (isFunction(options.scaled)) {
+ addListener(element, EVENT_SCALED, options.scaled, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_SCALED, {
+ scaleX: scaleX,
+ scaleY: scaleY,
+ oldScaleX: oldScaleX,
+ oldScaleY: oldScaleY
+ }, {
+ cancelable: false
+ });
+ });
+ }
+ }
+ return this;
+ },
+ /**
+ * Zoom the image with a relative ratio.
+ * @param {number} ratio - The target ratio.
+ * @param {boolean} [showTooltip=false] - Indicates whether to show the tooltip.
+ * @param {Object} [pivot] - The pivot point coordinate for zooming.
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @returns {Viewer} this
+ */
+ zoom: function zoom(ratio) {
+ var showTooltip = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+ var pivot = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
+ var _originalEvent = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
+ var imageData = this.imageData;
+ ratio = Number(ratio);
+ if (ratio < 0) {
+ ratio = 1 / (1 - ratio);
+ } else {
+ ratio = 1 + ratio;
+ }
+ this.zoomTo(imageData.width * ratio / imageData.naturalWidth, showTooltip, pivot, _originalEvent);
+ return this;
+ },
+ /**
+ * Zoom the image to an absolute ratio.
+ * @param {number} ratio - The target ratio.
+ * @param {boolean} [showTooltip] - Indicates whether to show the tooltip.
+ * @param {Object} [pivot] - The pivot point coordinate for zooming.
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @param {Event} [_zoomable=false] - Indicates if the current zoom is available or not.
+ * @returns {Viewer} this
+ */
+ zoomTo: function zoomTo(ratio) {
+ var _this6 = this;
+ var showTooltip = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+ var pivot = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
+ var _originalEvent = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
+ var _zoomable = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : false;
+ var element = this.element,
+ options = this.options,
+ pointers = this.pointers,
+ imageData = this.imageData;
+ var x = imageData.x,
+ y = imageData.y,
+ width = imageData.width,
+ height = imageData.height,
+ naturalWidth = imageData.naturalWidth,
+ naturalHeight = imageData.naturalHeight;
+ ratio = Math.max(0, ratio);
+ if (isNumber(ratio) && this.viewed && !this.played && (_zoomable || options.zoomable)) {
+ if (!_zoomable) {
+ var minZoomRatio = Math.max(0.01, options.minZoomRatio);
+ var maxZoomRatio = Math.min(100, options.maxZoomRatio);
+ ratio = Math.min(Math.max(ratio, minZoomRatio), maxZoomRatio);
+ }
+ if (_originalEvent) {
+ switch (_originalEvent.type) {
+ case 'wheel':
+ if (options.zoomRatio >= 0.055 && ratio > 0.95 && ratio < 1.05) {
+ ratio = 1;
+ }
+ break;
+ case 'pointermove':
+ case 'touchmove':
+ case 'mousemove':
+ if (ratio > 0.99 && ratio < 1.01) {
+ ratio = 1;
+ }
+ break;
+ }
+ }
+ var newWidth = naturalWidth * ratio;
+ var newHeight = naturalHeight * ratio;
+ var offsetWidth = newWidth - width;
+ var offsetHeight = newHeight - height;
+ var oldRatio = imageData.ratio;
+ if (isFunction(options.zoom)) {
+ addListener(element, EVENT_ZOOM, options.zoom, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_ZOOM, {
+ ratio: ratio,
+ oldRatio: oldRatio,
+ originalEvent: _originalEvent
+ }) === false) {
+ return this;
+ }
+ this.zooming = true;
+ if (_originalEvent) {
+ var offset = getOffset(this.viewer);
+ var center = pointers && Object.keys(pointers).length > 0 ? getPointersCenter(pointers) : {
+ pageX: _originalEvent.pageX,
+ pageY: _originalEvent.pageY
+ };
+
+ // Zoom from the triggering point of the event
+ imageData.x -= offsetWidth * ((center.pageX - offset.left - x) / width);
+ imageData.y -= offsetHeight * ((center.pageY - offset.top - y) / height);
+ } else if (isPlainObject(pivot) && isNumber(pivot.x) && isNumber(pivot.y)) {
+ imageData.x -= offsetWidth * ((pivot.x - x) / width);
+ imageData.y -= offsetHeight * ((pivot.y - y) / height);
+ } else {
+ // Zoom from the center of the image
+ imageData.x -= offsetWidth / 2;
+ imageData.y -= offsetHeight / 2;
+ }
+ imageData.left = imageData.x;
+ imageData.top = imageData.y;
+ imageData.width = newWidth;
+ imageData.height = newHeight;
+ imageData.oldRatio = oldRatio;
+ imageData.ratio = ratio;
+ this.renderImage(function () {
+ _this6.zooming = false;
+ if (isFunction(options.zoomed)) {
+ addListener(element, EVENT_ZOOMED, options.zoomed, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_ZOOMED, {
+ ratio: ratio,
+ oldRatio: oldRatio,
+ originalEvent: _originalEvent
+ }, {
+ cancelable: false
+ });
+ });
+ if (showTooltip) {
+ this.tooltip();
+ }
+ }
+ return this;
+ },
+ /**
+ * Play the images
+ * @param {boolean|FullscreenOptions} [fullscreen=false] - Indicate if request fullscreen or not.
+ * @returns {Viewer} this
+ */
+ play: function play() {
+ var _this7 = this;
+ var fullscreen = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ if (!this.isShown || this.played) {
+ return this;
+ }
+ var element = this.element,
+ options = this.options;
+ if (isFunction(options.play)) {
+ addListener(element, EVENT_PLAY, options.play, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_PLAY) === false) {
+ return this;
+ }
+ var player = this.player;
+ var onLoad = this.loadImage.bind(this);
+ var list = [];
+ var total = 0;
+ var index = 0;
+ this.played = true;
+ this.onLoadWhenPlay = onLoad;
+ if (fullscreen) {
+ this.requestFullscreen(fullscreen);
+ }
+ addClass(player, CLASS_SHOW);
+ forEach(this.items, function (item, i) {
+ var img = item.querySelector('img');
+ var image = document.createElement('img');
+ image.src = getData(img, 'originalUrl');
+ image.alt = img.getAttribute('alt');
+ image.referrerPolicy = img.referrerPolicy;
+ total += 1;
+ addClass(image, CLASS_FADE);
+ toggleClass(image, CLASS_TRANSITION, options.transition);
+ if (hasClass(item, CLASS_ACTIVE)) {
+ addClass(image, CLASS_IN);
+ index = i;
+ }
+ list.push(image);
+ addListener(image, EVENT_LOAD, onLoad, {
+ once: true
+ });
+ player.appendChild(image);
+ });
+ if (isNumber(options.interval) && options.interval > 0) {
+ var prev = function prev() {
+ clearTimeout(_this7.playing.timeout);
+ removeClass(list[index], CLASS_IN);
+ index -= 1;
+ index = index >= 0 ? index : total - 1;
+ addClass(list[index], CLASS_IN);
+ _this7.playing.timeout = setTimeout(prev, options.interval);
+ };
+ var next = function next() {
+ clearTimeout(_this7.playing.timeout);
+ removeClass(list[index], CLASS_IN);
+ index += 1;
+ index = index < total ? index : 0;
+ addClass(list[index], CLASS_IN);
+ _this7.playing.timeout = setTimeout(next, options.interval);
+ };
+ if (total > 1) {
+ this.playing = {
+ prev: prev,
+ next: next,
+ timeout: setTimeout(next, options.interval)
+ };
+ }
+ }
+ return this;
+ },
+ // Stop play
+ stop: function stop() {
+ var _this8 = this;
+ if (!this.played) {
+ return this;
+ }
+ var element = this.element,
+ options = this.options;
+ if (isFunction(options.stop)) {
+ addListener(element, EVENT_STOP, options.stop, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_STOP) === false) {
+ return this;
+ }
+ var player = this.player;
+ clearTimeout(this.playing.timeout);
+ this.playing = false;
+ this.played = false;
+ forEach(player.getElementsByTagName('img'), function (image) {
+ removeListener(image, EVENT_LOAD, _this8.onLoadWhenPlay);
+ });
+ removeClass(player, CLASS_SHOW);
+ player.innerHTML = '';
+ this.exitFullscreen();
+ return this;
+ },
+ // Enter modal mode (only available in inline mode)
+ full: function full() {
+ var _this9 = this;
+ var options = this.options,
+ viewer = this.viewer,
+ image = this.image,
+ list = this.list;
+ if (!this.isShown || this.played || this.fulled || !options.inline) {
+ return this;
+ }
+ this.fulled = true;
+ this.open();
+ addClass(this.button, CLASS_FULLSCREEN_EXIT);
+ if (options.transition) {
+ removeClass(list, CLASS_TRANSITION);
+ if (this.viewed) {
+ removeClass(image, CLASS_TRANSITION);
+ }
+ }
+ addClass(viewer, CLASS_FIXED);
+ viewer.setAttribute('role', 'dialog');
+ viewer.setAttribute('aria-labelledby', this.title.id);
+ viewer.setAttribute('aria-modal', true);
+ viewer.removeAttribute('style');
+ setStyle(viewer, {
+ zIndex: options.zIndex
+ });
+ if (options.focus) {
+ this.enforceFocus();
+ }
+ this.initContainer();
+ this.viewerData = assign({}, this.containerData);
+ this.renderList();
+ if (this.viewed) {
+ this.initImage(function () {
+ _this9.renderImage(function () {
+ if (options.transition) {
+ setTimeout(function () {
+ addClass(image, CLASS_TRANSITION);
+ addClass(list, CLASS_TRANSITION);
+ }, 0);
+ }
+ });
+ });
+ }
+ return this;
+ },
+ // Exit modal mode (only available in inline mode)
+ exit: function exit() {
+ var _this10 = this;
+ var options = this.options,
+ viewer = this.viewer,
+ image = this.image,
+ list = this.list;
+ if (!this.isShown || this.played || !this.fulled || !options.inline) {
+ return this;
+ }
+ this.fulled = false;
+ this.close();
+ removeClass(this.button, CLASS_FULLSCREEN_EXIT);
+ if (options.transition) {
+ removeClass(list, CLASS_TRANSITION);
+ if (this.viewed) {
+ removeClass(image, CLASS_TRANSITION);
+ }
+ }
+ if (options.focus) {
+ this.clearEnforceFocus();
+ }
+ viewer.removeAttribute('role');
+ viewer.removeAttribute('aria-labelledby');
+ viewer.removeAttribute('aria-modal');
+ removeClass(viewer, CLASS_FIXED);
+ setStyle(viewer, {
+ zIndex: options.zIndexInline
+ });
+ this.viewerData = assign({}, this.parentData);
+ this.renderViewer();
+ this.renderList();
+ if (this.viewed) {
+ this.initImage(function () {
+ _this10.renderImage(function () {
+ if (options.transition) {
+ setTimeout(function () {
+ addClass(image, CLASS_TRANSITION);
+ addClass(list, CLASS_TRANSITION);
+ }, 0);
+ }
+ });
+ });
+ }
+ return this;
+ },
+ // Show the current ratio of the image with percentage
+ tooltip: function tooltip() {
+ var _this11 = this;
+ var options = this.options,
+ tooltipBox = this.tooltipBox,
+ imageData = this.imageData;
+ if (!this.viewed || this.played || !options.tooltip) {
+ return this;
+ }
+ tooltipBox.textContent = "".concat(Math.round(imageData.ratio * 100), "%");
+ if (!this.tooltipping) {
+ if (options.transition) {
+ if (this.fading) {
+ dispatchEvent(tooltipBox, EVENT_TRANSITION_END);
+ }
+ addClass(tooltipBox, CLASS_SHOW);
+ addClass(tooltipBox, CLASS_FADE);
+ addClass(tooltipBox, CLASS_TRANSITION);
+ tooltipBox.removeAttribute('aria-hidden');
+
+ // Force reflow to enable CSS3 transition
+ tooltipBox.initialOffsetWidth = tooltipBox.offsetWidth;
+ addClass(tooltipBox, CLASS_IN);
+ } else {
+ addClass(tooltipBox, CLASS_SHOW);
+ tooltipBox.removeAttribute('aria-hidden');
+ }
+ } else {
+ clearTimeout(this.tooltipping);
+ }
+ this.tooltipping = setTimeout(function () {
+ if (options.transition) {
+ addListener(tooltipBox, EVENT_TRANSITION_END, function () {
+ removeClass(tooltipBox, CLASS_SHOW);
+ removeClass(tooltipBox, CLASS_FADE);
+ removeClass(tooltipBox, CLASS_TRANSITION);
+ tooltipBox.setAttribute('aria-hidden', true);
+ _this11.fading = false;
+ }, {
+ once: true
+ });
+ removeClass(tooltipBox, CLASS_IN);
+ _this11.fading = true;
+ } else {
+ removeClass(tooltipBox, CLASS_SHOW);
+ tooltipBox.setAttribute('aria-hidden', true);
+ }
+ _this11.tooltipping = false;
+ }, 1000);
+ return this;
+ },
+ /**
+ * Toggle the image size between its current size and natural size
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @returns {Viewer} this
+ */
+ toggle: function toggle() {
+ var _originalEvent = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
+ if (this.imageData.ratio === 1) {
+ this.zoomTo(this.imageData.oldRatio, true, null, _originalEvent);
+ } else {
+ this.zoomTo(1, true, null, _originalEvent);
+ }
+ return this;
+ },
+ // Reset the image to its initial state
+ reset: function reset() {
+ if (this.viewed && !this.played) {
+ this.imageData = assign({}, this.initialImageData);
+ this.renderImage();
+ }
+ return this;
+ },
+ // Update viewer when images changed
+ update: function update() {
+ var _this12 = this;
+ var element = this.element,
+ options = this.options,
+ isImg = this.isImg;
+
+ // Destroy viewer if the target image was deleted
+ if (isImg && !element.parentNode) {
+ return this.destroy();
+ }
+ var images = [];
+ forEach(isImg ? [element] : element.querySelectorAll('img'), function (image) {
+ if (isFunction(options.filter)) {
+ if (options.filter.call(_this12, image)) {
+ images.push(image);
+ }
+ } else if (_this12.getImageURL(image)) {
+ images.push(image);
+ }
+ });
+ if (!images.length) {
+ return this;
+ }
+ this.images = images;
+ this.length = images.length;
+ if (this.ready) {
+ var changedIndexes = [];
+ forEach(this.items, function (item, i) {
+ var img = item.querySelector('img');
+ var image = images[i];
+ if (image && img) {
+ if (image.src !== img.src
+
+ // Title changed (#408)
+ || image.alt !== img.alt) {
+ changedIndexes.push(i);
+ }
+ } else {
+ changedIndexes.push(i);
+ }
+ });
+ setStyle(this.list, {
+ width: 'auto'
+ });
+ this.initList();
+ if (this.isShown) {
+ if (this.length) {
+ if (this.viewed) {
+ var changedIndex = changedIndexes.indexOf(this.index);
+ if (changedIndex >= 0) {
+ this.viewed = false;
+ this.view(Math.max(Math.min(this.index - changedIndex, this.length - 1), 0));
+ } else {
+ var activeItem = this.items[this.index];
+
+ // Reactivate the current viewing item after reset the list.
+ addClass(activeItem, CLASS_ACTIVE);
+ activeItem.setAttribute('aria-selected', true);
+ }
+ }
+ } else {
+ this.image = null;
+ this.viewed = false;
+ this.index = 0;
+ this.imageData = {};
+ this.canvas.innerHTML = '';
+ this.title.innerHTML = '';
+ }
+ }
+ } else {
+ this.build();
+ }
+ return this;
+ },
+ // Destroy the viewer
+ destroy: function destroy() {
+ var element = this.element,
+ options = this.options;
+ if (!element[NAMESPACE]) {
+ return this;
+ }
+ this.destroyed = true;
+ if (this.ready) {
+ if (this.played) {
+ this.stop();
+ }
+ if (options.inline) {
+ if (this.fulled) {
+ this.exit();
+ }
+ this.unbind();
+ } else if (this.isShown) {
+ if (this.viewing) {
+ if (this.imageRendering) {
+ this.imageRendering.abort();
+ } else if (this.imageInitializing) {
+ this.imageInitializing.abort();
+ }
+ }
+ if (this.hiding) {
+ this.transitioning.abort();
+ }
+ this.hidden();
+ } else if (this.showing) {
+ this.transitioning.abort();
+ this.hidden();
+ }
+ this.ready = false;
+ this.viewer.parentNode.removeChild(this.viewer);
+ } else if (options.inline) {
+ if (this.delaying) {
+ this.delaying.abort();
+ } else if (this.initializing) {
+ this.initializing.abort();
+ }
+ }
+ if (!options.inline) {
+ removeListener(element, EVENT_CLICK, this.onStart);
+ }
+ element[NAMESPACE] = undefined;
+ return this;
+ }
+};
+
+var others = {
+ getImageURL: function getImageURL(image) {
+ var url = this.options.url;
+ if (isString(url)) {
+ url = image.getAttribute(url);
+ } else if (isFunction(url)) {
+ url = url.call(this, image);
+ } else {
+ url = '';
+ }
+ return url;
+ },
+ enforceFocus: function enforceFocus() {
+ var _this = this;
+ this.clearEnforceFocus();
+ addListener(document, EVENT_FOCUSIN, this.onFocusin = function (event) {
+ var viewer = _this.viewer;
+ var target = event.target;
+ if (target === document || target === viewer || viewer.contains(target)) {
+ return;
+ }
+ while (target) {
+ // Avoid conflicts with other modals (#474, #540)
+ if (target.getAttribute('tabindex') !== null || target.getAttribute('aria-modal') === 'true') {
+ return;
+ }
+ target = target.parentElement;
+ }
+ viewer.focus();
+ });
+ },
+ clearEnforceFocus: function clearEnforceFocus() {
+ if (this.onFocusin) {
+ removeListener(document, EVENT_FOCUSIN, this.onFocusin);
+ this.onFocusin = null;
+ }
+ },
+ open: function open() {
+ var body = this.body;
+ addClass(body, CLASS_OPEN);
+ if (this.scrollbarWidth > 0) {
+ body.style.paddingRight = "".concat(this.scrollbarWidth + (parseFloat(this.initialBodyComputedPaddingRight) || 0), "px");
+ }
+ },
+ close: function close() {
+ var body = this.body;
+ removeClass(body, CLASS_OPEN);
+ if (this.scrollbarWidth > 0) {
+ body.style.paddingRight = this.initialBodyPaddingRight;
+ }
+ },
+ shown: function shown() {
+ var element = this.element,
+ options = this.options,
+ viewer = this.viewer;
+ this.fulled = true;
+ this.isShown = true;
+ this.render();
+ this.bind();
+ this.showing = false;
+ if (options.focus) {
+ viewer.focus();
+ this.enforceFocus();
+ }
+ if (isFunction(options.shown)) {
+ addListener(element, EVENT_SHOWN, options.shown, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_SHOWN) === false) {
+ return;
+ }
+ if (this.ready && this.isShown && !this.hiding) {
+ this.view(this.index);
+ }
+ },
+ hidden: function hidden() {
+ var element = this.element,
+ options = this.options,
+ viewer = this.viewer;
+ if (options.fucus) {
+ this.clearEnforceFocus();
+ }
+ this.fulled = false;
+ this.viewed = false;
+ this.isShown = false;
+ this.close();
+ this.unbind();
+ addClass(viewer, CLASS_HIDE);
+ viewer.removeAttribute('role');
+ viewer.removeAttribute('aria-labelledby');
+ viewer.removeAttribute('aria-modal');
+ viewer.setAttribute('aria-hidden', true);
+ this.resetList();
+ this.resetImage();
+ this.hiding = false;
+ if (!this.destroyed) {
+ if (isFunction(options.hidden)) {
+ addListener(element, EVENT_HIDDEN, options.hidden, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_HIDDEN, null, {
+ cancelable: false
+ });
+ }
+ },
+ requestFullscreen: function requestFullscreen(options) {
+ var document = this.element.ownerDocument;
+ if (this.fulled && !(document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement)) {
+ var documentElement = document.documentElement;
+
+ // Element.requestFullscreen()
+ if (documentElement.requestFullscreen) {
+ // Avoid TypeError when convert `options` to dictionary
+ if (isPlainObject(options)) {
+ documentElement.requestFullscreen(options);
+ } else {
+ documentElement.requestFullscreen();
+ }
+ } else if (documentElement.webkitRequestFullscreen) {
+ documentElement.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
+ } else if (documentElement.mozRequestFullScreen) {
+ documentElement.mozRequestFullScreen();
+ } else if (documentElement.msRequestFullscreen) {
+ documentElement.msRequestFullscreen();
+ }
+ }
+ },
+ exitFullscreen: function exitFullscreen() {
+ var document = this.element.ownerDocument;
+ if (this.fulled && (document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement)) {
+ // Document.exitFullscreen()
+ if (document.exitFullscreen) {
+ document.exitFullscreen();
+ } else if (document.webkitExitFullscreen) {
+ document.webkitExitFullscreen();
+ } else if (document.mozCancelFullScreen) {
+ document.mozCancelFullScreen();
+ } else if (document.msExitFullscreen) {
+ document.msExitFullscreen();
+ }
+ }
+ },
+ change: function change(event) {
+ var options = this.options,
+ pointers = this.pointers;
+ var pointer = pointers[Object.keys(pointers)[0]];
+
+ // In the case of the `pointers` object is empty (#421)
+ if (!pointer) {
+ return;
+ }
+ var offsetX = pointer.endX - pointer.startX;
+ var offsetY = pointer.endY - pointer.startY;
+ switch (this.action) {
+ // Move the current image
+ case ACTION_MOVE:
+ this.move(offsetX, offsetY, event);
+ break;
+
+ // Zoom the current image
+ case ACTION_ZOOM:
+ this.zoom(getMaxZoomRatio(pointers), false, null, event);
+ break;
+ case ACTION_SWITCH:
+ {
+ this.action = 'switched';
+ var absoluteOffsetX = Math.abs(offsetX);
+ if (absoluteOffsetX > 1 && absoluteOffsetX > Math.abs(offsetY)) {
+ // Empty `pointers` as `touchend` event will not be fired after swiped in iOS browsers.
+ this.pointers = {};
+ if (offsetX > 1) {
+ this.prev(options.loop);
+ } else if (offsetX < -1) {
+ this.next(options.loop);
+ }
+ }
+ break;
+ }
+ }
+
+ // Override
+ forEach(pointers, function (p) {
+ p.startX = p.endX;
+ p.startY = p.endY;
+ });
+ },
+ isSwitchable: function isSwitchable() {
+ var imageData = this.imageData,
+ viewerData = this.viewerData;
+ return this.length > 1 && imageData.x >= 0 && imageData.y >= 0 && imageData.width <= viewerData.width && imageData.height <= viewerData.height;
+ }
+};
+
+var AnotherViewer = WINDOW.Viewer;
+var getUniqueID = function (id) {
+ return function () {
+ id += 1;
+ return id;
+ };
+}(-1);
+var Viewer = /*#__PURE__*/function () {
+ /**
+ * Create a new Viewer.
+ * @param {Element} element - The target element for viewing.
+ * @param {Object} [options={}] - The configuration options.
+ */
+ function Viewer(element) {
+ var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+ _classCallCheck(this, Viewer);
+ if (!element || element.nodeType !== 1) {
+ throw new Error('The first argument is required and must be an element.');
+ }
+ this.element = element;
+ this.options = assign({}, DEFAULTS, isPlainObject(options) && options);
+ this.action = false;
+ this.fading = false;
+ this.fulled = false;
+ this.hiding = false;
+ this.imageClicked = false;
+ this.imageData = {};
+ this.index = this.options.initialViewIndex;
+ this.isImg = false;
+ this.isShown = false;
+ this.length = 0;
+ this.moving = false;
+ this.played = false;
+ this.playing = false;
+ this.pointers = {};
+ this.ready = false;
+ this.rotating = false;
+ this.scaling = false;
+ this.showing = false;
+ this.timeout = false;
+ this.tooltipping = false;
+ this.viewed = false;
+ this.viewing = false;
+ this.wheeling = false;
+ this.zooming = false;
+ this.pointerMoved = false;
+ this.id = getUniqueID();
+ this.init();
+ }
+ _createClass(Viewer, [{
+ key: "init",
+ value: function init() {
+ var _this = this;
+ var element = this.element,
+ options = this.options;
+ if (element[NAMESPACE]) {
+ return;
+ }
+ element[NAMESPACE] = this;
+
+ // The `focus` option requires the `keyboard` option set to `true`.
+ if (options.focus && !options.keyboard) {
+ options.focus = false;
+ }
+ var isImg = element.localName === 'img';
+ var images = [];
+ forEach(isImg ? [element] : element.querySelectorAll('img'), function (image) {
+ if (isFunction(options.filter)) {
+ if (options.filter.call(_this, image)) {
+ images.push(image);
+ }
+ } else if (_this.getImageURL(image)) {
+ images.push(image);
+ }
+ });
+ this.isImg = isImg;
+ this.length = images.length;
+ this.images = images;
+ this.initBody();
+
+ // Override `transition` option if it is not supported
+ if (isUndefined(document.createElement(NAMESPACE).style.transition)) {
+ options.transition = false;
+ }
+ if (options.inline) {
+ var count = 0;
+ var progress = function progress() {
+ count += 1;
+ if (count === _this.length) {
+ var timeout;
+ _this.initializing = false;
+ _this.delaying = {
+ abort: function abort() {
+ clearTimeout(timeout);
+ }
+ };
+
+ // build asynchronously to keep `this.viewer` is accessible in `ready` event handler.
+ timeout = setTimeout(function () {
+ _this.delaying = false;
+ _this.build();
+ }, 0);
+ }
+ };
+ this.initializing = {
+ abort: function abort() {
+ forEach(images, function (image) {
+ if (!image.complete) {
+ removeListener(image, EVENT_LOAD, progress);
+ removeListener(image, EVENT_ERROR, progress);
+ }
+ });
+ }
+ };
+ forEach(images, function (image) {
+ if (image.complete) {
+ progress();
+ } else {
+ var onLoad;
+ var onError;
+ addListener(image, EVENT_LOAD, onLoad = function onLoad() {
+ removeListener(image, EVENT_ERROR, onError);
+ progress();
+ }, {
+ once: true
+ });
+ addListener(image, EVENT_ERROR, onError = function onError() {
+ removeListener(image, EVENT_LOAD, onLoad);
+ progress();
+ }, {
+ once: true
+ });
+ }
+ });
+ } else {
+ addListener(element, EVENT_CLICK, this.onStart = function (_ref) {
+ var target = _ref.target;
+ if (target.localName === 'img' && (!isFunction(options.filter) || options.filter.call(_this, target))) {
+ _this.view(_this.images.indexOf(target));
+ }
+ });
+ }
+ }
+ }, {
+ key: "build",
+ value: function build() {
+ if (this.ready) {
+ return;
+ }
+ var element = this.element,
+ options = this.options;
+ var parent = element.parentNode;
+ var template = document.createElement('div');
+ template.innerHTML = TEMPLATE;
+ var viewer = template.querySelector(".".concat(NAMESPACE, "-container"));
+ var title = viewer.querySelector(".".concat(NAMESPACE, "-title"));
+ var toolbar = viewer.querySelector(".".concat(NAMESPACE, "-toolbar"));
+ var navbar = viewer.querySelector(".".concat(NAMESPACE, "-navbar"));
+ var button = viewer.querySelector(".".concat(NAMESPACE, "-button"));
+ var canvas = viewer.querySelector(".".concat(NAMESPACE, "-canvas"));
+ this.parent = parent;
+ this.viewer = viewer;
+ this.title = title;
+ this.toolbar = toolbar;
+ this.navbar = navbar;
+ this.button = button;
+ this.canvas = canvas;
+ this.footer = viewer.querySelector(".".concat(NAMESPACE, "-footer"));
+ this.tooltipBox = viewer.querySelector(".".concat(NAMESPACE, "-tooltip"));
+ this.player = viewer.querySelector(".".concat(NAMESPACE, "-player"));
+ this.list = viewer.querySelector(".".concat(NAMESPACE, "-list"));
+ viewer.id = "".concat(NAMESPACE).concat(this.id);
+ title.id = "".concat(NAMESPACE, "Title").concat(this.id);
+ addClass(title, !options.title ? CLASS_HIDE : getResponsiveClass(Array.isArray(options.title) ? options.title[0] : options.title));
+ addClass(navbar, !options.navbar ? CLASS_HIDE : getResponsiveClass(options.navbar));
+ toggleClass(button, CLASS_HIDE, !options.button);
+ if (options.keyboard) {
+ button.setAttribute('tabindex', 0);
+ }
+ if (options.backdrop) {
+ addClass(viewer, "".concat(NAMESPACE, "-backdrop"));
+ if (!options.inline && options.backdrop !== 'static') {
+ setData(canvas, DATA_ACTION, 'hide');
+ }
+ }
+ if (isString(options.className) && options.className) {
+ // In case there are multiple class names
+ options.className.split(REGEXP_SPACES).forEach(function (className) {
+ addClass(viewer, className);
+ });
+ }
+ if (options.toolbar) {
+ var list = document.createElement('ul');
+ var custom = isPlainObject(options.toolbar);
+ var zoomButtons = BUTTONS.slice(0, 3);
+ var rotateButtons = BUTTONS.slice(7, 9);
+ var scaleButtons = BUTTONS.slice(9);
+ if (!custom) {
+ addClass(toolbar, getResponsiveClass(options.toolbar));
+ }
+ forEach(custom ? options.toolbar : BUTTONS, function (value, index) {
+ var deep = custom && isPlainObject(value);
+ var name = custom ? hyphenate(index) : value;
+ var show = deep && !isUndefined(value.show) ? value.show : value;
+ if (!show || !options.zoomable && zoomButtons.indexOf(name) !== -1 || !options.rotatable && rotateButtons.indexOf(name) !== -1 || !options.scalable && scaleButtons.indexOf(name) !== -1) {
+ return;
+ }
+ var size = deep && !isUndefined(value.size) ? value.size : value;
+ var click = deep && !isUndefined(value.click) ? value.click : value;
+ var item = document.createElement('li');
+ if (options.keyboard) {
+ item.setAttribute('tabindex', 0);
+ }
+ item.setAttribute('role', 'button');
+ addClass(item, "".concat(NAMESPACE, "-").concat(name));
+ if (!isFunction(click)) {
+ setData(item, DATA_ACTION, name);
+ }
+ if (isNumber(show)) {
+ addClass(item, getResponsiveClass(show));
+ }
+ if (['small', 'large'].indexOf(size) !== -1) {
+ addClass(item, "".concat(NAMESPACE, "-").concat(size));
+ } else if (name === 'play') {
+ addClass(item, "".concat(NAMESPACE, "-large"));
+ }
+ if (isFunction(click)) {
+ addListener(item, EVENT_CLICK, click);
+ }
+ list.appendChild(item);
+ });
+ toolbar.appendChild(list);
+ } else {
+ addClass(toolbar, CLASS_HIDE);
+ }
+ if (!options.rotatable) {
+ var rotates = toolbar.querySelectorAll('li[class*="rotate"]');
+ addClass(rotates, CLASS_INVISIBLE);
+ forEach(rotates, function (rotate) {
+ toolbar.appendChild(rotate);
+ });
+ }
+ if (options.inline) {
+ addClass(button, CLASS_FULLSCREEN);
+ setStyle(viewer, {
+ zIndex: options.zIndexInline
+ });
+ if (window.getComputedStyle(parent).position === 'static') {
+ setStyle(parent, {
+ position: 'relative'
+ });
+ }
+ parent.insertBefore(viewer, element.nextSibling);
+ } else {
+ addClass(button, CLASS_CLOSE);
+ addClass(viewer, CLASS_FIXED);
+ addClass(viewer, CLASS_FADE);
+ addClass(viewer, CLASS_HIDE);
+ setStyle(viewer, {
+ zIndex: options.zIndex
+ });
+ var container = options.container;
+ if (isString(container)) {
+ container = element.ownerDocument.querySelector(container);
+ }
+ if (!container) {
+ container = this.body;
+ }
+ container.appendChild(viewer);
+ }
+ if (options.inline) {
+ this.render();
+ this.bind();
+ this.isShown = true;
+ }
+ this.ready = true;
+ if (isFunction(options.ready)) {
+ addListener(element, EVENT_READY, options.ready, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_READY) === false) {
+ this.ready = false;
+ return;
+ }
+ if (this.ready && options.inline) {
+ this.view(this.index);
+ }
+ }
+
+ /**
+ * Get the no conflict viewer class.
+ * @returns {Viewer} The viewer class.
+ */
+ }], [{
+ key: "noConflict",
+ value: function noConflict() {
+ window.Viewer = AnotherViewer;
+ return Viewer;
+ }
+
+ /**
+ * Change the default options.
+ * @param {Object} options - The new default options.
+ */
+ }, {
+ key: "setDefaults",
+ value: function setDefaults(options) {
+ assign(DEFAULTS, isPlainObject(options) && options);
+ }
+ }]);
+ return Viewer;
+}();
+assign(Viewer.prototype, render, events, handlers, methods, others);
+
+module.exports = Viewer;
diff --git a/static/viewerjs/dist/viewer.css b/static/viewerjs/dist/viewer.css
new file mode 100644
index 0000000..8fb4613
--- /dev/null
+++ b/static/viewerjs/dist/viewer.css
@@ -0,0 +1,446 @@
+/*!
+ * Viewer.js v1.11.2
+ * https://fengyuanchen.github.io/viewerjs
+ *
+ * Copyright 2015-present Chen Fengyuan
+ * Released under the MIT license
+ *
+ * Date: 2023-01-01T10:14:47.694Z
+ */
+
+.viewer-zoom-in::before, .viewer-zoom-out::before, .viewer-one-to-one::before, .viewer-reset::before, .viewer-prev::before, .viewer-play::before, .viewer-next::before, .viewer-rotate-left::before, .viewer-rotate-right::before, .viewer-flip-horizontal::before, .viewer-flip-vertical::before, .viewer-fullscreen::before, .viewer-fullscreen-exit::before, .viewer-close::before {
+ background-image: url("data:image/png;base64,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");
+ background-repeat: no-repeat;
+ background-size: 280px;
+ color: transparent;
+ display: block;
+ font-size: 0;
+ height: 20px;
+ line-height: 0;
+ width: 20px;
+ }
+
+.viewer-zoom-in::before {
+ background-position: 0 0;
+ content: "Zoom In";
+}
+
+.viewer-zoom-out::before {
+ background-position: -20px 0;
+ content: "Zoom Out";
+}
+
+.viewer-one-to-one::before {
+ background-position: -40px 0;
+ content: "One to One";
+}
+
+.viewer-reset::before {
+ background-position: -60px 0;
+ content: "Reset";
+}
+
+.viewer-prev::before {
+ background-position: -80px 0;
+ content: "Previous";
+}
+
+.viewer-play::before {
+ background-position: -100px 0;
+ content: "Play";
+}
+
+.viewer-next::before {
+ background-position: -120px 0;
+ content: "Next";
+}
+
+.viewer-rotate-left::before {
+ background-position: -140px 0;
+ content: "Rotate Left";
+}
+
+.viewer-rotate-right::before {
+ background-position: -160px 0;
+ content: "Rotate Right";
+}
+
+.viewer-flip-horizontal::before {
+ background-position: -180px 0;
+ content: "Flip Horizontal";
+}
+
+.viewer-flip-vertical::before {
+ background-position: -200px 0;
+ content: "Flip Vertical";
+}
+
+.viewer-fullscreen::before {
+ background-position: -220px 0;
+ content: "Enter Full Screen";
+}
+
+.viewer-fullscreen-exit::before {
+ background-position: -240px 0;
+ content: "Exit Full Screen";
+}
+
+.viewer-close::before {
+ background-position: -260px 0;
+ content: "Close";
+}
+
+.viewer-container {
+ bottom: 0;
+ direction: ltr;
+ font-size: 0;
+ left: 0;
+ line-height: 0;
+ overflow: hidden;
+ position: absolute;
+ right: 0;
+ -webkit-tap-highlight-color: transparent;
+ top: 0;
+ -ms-touch-action: none;
+ touch-action: none;
+ -webkit-touch-callout: none;
+ -webkit-user-select: none;
+ -moz-user-select: none;
+ -ms-user-select: none;
+ user-select: none;
+}
+
+.viewer-container::-moz-selection, .viewer-container *::-moz-selection {
+ background-color: transparent;
+ }
+
+.viewer-container::selection,
+ .viewer-container *::selection {
+ background-color: transparent;
+ }
+
+.viewer-container:focus {
+ outline: 0;
+ }
+
+.viewer-container img {
+ display: block;
+ height: auto;
+ max-height: none !important;
+ max-width: none !important;
+ min-height: 0 !important;
+ min-width: 0 !important;
+ width: 100%;
+ }
+
+.viewer-canvas {
+ bottom: 0;
+ left: 0;
+ overflow: hidden;
+ position: absolute;
+ right: 0;
+ top: 0;
+}
+
+.viewer-canvas > img {
+ height: auto;
+ margin: 15px auto;
+ max-width: 90% !important;
+ width: auto;
+ }
+
+.viewer-footer {
+ bottom: 0;
+ left: 0;
+ overflow: hidden;
+ position: absolute;
+ right: 0;
+ text-align: center;
+}
+
+.viewer-navbar {
+ background-color: rgba(0, 0, 0, 50%);
+ overflow: hidden;
+}
+
+.viewer-list {
+ box-sizing: content-box;
+ height: 50px;
+ margin: 0;
+ overflow: hidden;
+ padding: 1px 0;
+}
+
+.viewer-list > li {
+ color: transparent;
+ cursor: pointer;
+ float: left;
+ font-size: 0;
+ height: 50px;
+ line-height: 0;
+ opacity: 0.5;
+ overflow: hidden;
+ transition: opacity 0.15s;
+ width: 30px;
+ }
+
+.viewer-list > li:focus,
+ .viewer-list > li:hover {
+ opacity: 0.75;
+ }
+
+.viewer-list > li:focus {
+ outline: 0;
+ }
+
+.viewer-list > li + li {
+ margin-left: 1px;
+ }
+
+.viewer-list > .viewer-loading {
+ position: relative;
+ }
+
+.viewer-list > .viewer-loading::after {
+ border-width: 2px;
+ height: 20px;
+ margin-left: -10px;
+ margin-top: -10px;
+ width: 20px;
+ }
+
+.viewer-list > .viewer-active,
+ .viewer-list > .viewer-active:focus,
+ .viewer-list > .viewer-active:hover {
+ opacity: 1;
+ }
+
+.viewer-player {
+ background-color: #000;
+ bottom: 0;
+ cursor: none;
+ display: none;
+ left: 0;
+ position: absolute;
+ right: 0;
+ top: 0;
+ z-index: 1;
+}
+
+.viewer-player > img {
+ left: 0;
+ position: absolute;
+ top: 0;
+ }
+
+.viewer-toolbar > ul {
+ display: inline-block;
+ margin: 0 auto 5px;
+ overflow: hidden;
+ padding: 6px 3px;
+ }
+
+.viewer-toolbar > ul > li {
+ background-color: rgba(0, 0, 0, 50%);
+ border-radius: 50%;
+ cursor: pointer;
+ float: left;
+ height: 24px;
+ overflow: hidden;
+ transition: background-color 0.15s;
+ width: 24px;
+ }
+
+.viewer-toolbar > ul > li:focus,
+ .viewer-toolbar > ul > li:hover {
+ background-color: rgba(0, 0, 0, 80%);
+ }
+
+.viewer-toolbar > ul > li:focus {
+ box-shadow: 0 0 3px #fff;
+ outline: 0;
+ position: relative;
+ z-index: 1;
+ }
+
+.viewer-toolbar > ul > li::before {
+ margin: 2px;
+ }
+
+.viewer-toolbar > ul > li + li {
+ margin-left: 1px;
+ }
+
+.viewer-toolbar > ul > .viewer-small {
+ height: 18px;
+ margin-bottom: 3px;
+ margin-top: 3px;
+ width: 18px;
+ }
+
+.viewer-toolbar > ul > .viewer-small::before {
+ margin: -1px;
+ }
+
+.viewer-toolbar > ul > .viewer-large {
+ height: 30px;
+ margin-bottom: -3px;
+ margin-top: -3px;
+ width: 30px;
+ }
+
+.viewer-toolbar > ul > .viewer-large::before {
+ margin: 5px;
+ }
+
+.viewer-tooltip {
+ background-color: rgba(0, 0, 0, 80%);
+ border-radius: 10px;
+ color: #fff;
+ display: none;
+ font-size: 12px;
+ height: 20px;
+ left: 50%;
+ line-height: 20px;
+ margin-left: -25px;
+ margin-top: -10px;
+ position: absolute;
+ text-align: center;
+ top: 50%;
+ width: 50px;
+}
+
+.viewer-title {
+ color: #ccc;
+ display: inline-block;
+ font-size: 12px;
+ line-height: 1.2;
+ margin: 5px 5%;
+ max-width: 90%;
+ min-height: 14px;
+ opacity: 0.8;
+ overflow: hidden;
+ text-overflow: ellipsis;
+ transition: opacity 0.15s;
+ white-space: nowrap;
+}
+
+.viewer-title:hover {
+ opacity: 1;
+ }
+
+.viewer-button {
+ -webkit-app-region: no-drag;
+ background-color: rgba(0, 0, 0, 50%);
+ border-radius: 50%;
+ cursor: pointer;
+ height: 80px;
+ overflow: hidden;
+ position: absolute;
+ right: -40px;
+ top: -40px;
+ transition: background-color 0.15s;
+ width: 80px;
+}
+
+.viewer-button:focus,
+ .viewer-button:hover {
+ background-color: rgba(0, 0, 0, 80%);
+ }
+
+.viewer-button:focus {
+ box-shadow: 0 0 3px #fff;
+ outline: 0;
+ }
+
+.viewer-button::before {
+ bottom: 15px;
+ left: 15px;
+ position: absolute;
+ }
+
+.viewer-fixed {
+ position: fixed;
+}
+
+.viewer-open {
+ overflow: hidden;
+}
+
+.viewer-show {
+ display: block;
+}
+
+.viewer-hide {
+ display: none;
+}
+
+.viewer-backdrop {
+ background-color: rgba(0, 0, 0, 50%);
+}
+
+.viewer-invisible {
+ visibility: hidden;
+}
+
+.viewer-move {
+ cursor: move;
+ cursor: grab;
+}
+
+.viewer-fade {
+ opacity: 0;
+}
+
+.viewer-in {
+ opacity: 1;
+}
+
+.viewer-transition {
+ transition: all 0.3s;
+}
+
+@keyframes viewer-spinner {
+ 0% {
+ transform: rotate(0deg);
+ }
+
+ 100% {
+ transform: rotate(360deg);
+ }
+}
+
+.viewer-loading::after {
+ animation: viewer-spinner 1s linear infinite;
+ border: 4px solid rgba(255, 255, 255, 10%);
+ border-left-color: rgba(255, 255, 255, 50%);
+ border-radius: 50%;
+ content: "";
+ display: inline-block;
+ height: 40px;
+ left: 50%;
+ margin-left: -20px;
+ margin-top: -20px;
+ position: absolute;
+ top: 50%;
+ width: 40px;
+ z-index: 1;
+ }
+
+@media (max-width: 767px) {
+ .viewer-hide-xs-down {
+ display: none;
+ }
+}
+
+@media (max-width: 991px) {
+ .viewer-hide-sm-down {
+ display: none;
+ }
+}
+
+@media (max-width: 1199px) {
+ .viewer-hide-md-down {
+ display: none;
+ }
+}
diff --git a/static/viewerjs/dist/viewer.esm.js b/static/viewerjs/dist/viewer.esm.js
new file mode 100644
index 0000000..fbb881c
--- /dev/null
+++ b/static/viewerjs/dist/viewer.esm.js
@@ -0,0 +1,3233 @@
+/*!
+ * Viewer.js v1.11.2
+ * https://fengyuanchen.github.io/viewerjs
+ *
+ * Copyright 2015-present Chen Fengyuan
+ * Released under the MIT license
+ *
+ * Date: 2023-01-01T10:14:49.638Z
+ */
+
+function ownKeys(object, enumerableOnly) {
+ var keys = Object.keys(object);
+ if (Object.getOwnPropertySymbols) {
+ var symbols = Object.getOwnPropertySymbols(object);
+ enumerableOnly && (symbols = symbols.filter(function (sym) {
+ return Object.getOwnPropertyDescriptor(object, sym).enumerable;
+ })), keys.push.apply(keys, symbols);
+ }
+ return keys;
+}
+function _objectSpread2(target) {
+ for (var i = 1; i < arguments.length; i++) {
+ var source = null != arguments[i] ? arguments[i] : {};
+ i % 2 ? ownKeys(Object(source), !0).forEach(function (key) {
+ _defineProperty(target, key, source[key]);
+ }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) {
+ Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
+ });
+ }
+ return target;
+}
+function _typeof(obj) {
+ "@babel/helpers - typeof";
+
+ return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
+ return typeof obj;
+ } : function (obj) {
+ return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+ }, _typeof(obj);
+}
+function _classCallCheck(instance, Constructor) {
+ if (!(instance instanceof Constructor)) {
+ throw new TypeError("Cannot call a class as a function");
+ }
+}
+function _defineProperties(target, props) {
+ for (var i = 0; i < props.length; i++) {
+ var descriptor = props[i];
+ descriptor.enumerable = descriptor.enumerable || false;
+ descriptor.configurable = true;
+ if ("value" in descriptor) descriptor.writable = true;
+ Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor);
+ }
+}
+function _createClass(Constructor, protoProps, staticProps) {
+ if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+ if (staticProps) _defineProperties(Constructor, staticProps);
+ Object.defineProperty(Constructor, "prototype", {
+ writable: false
+ });
+ return Constructor;
+}
+function _defineProperty(obj, key, value) {
+ key = _toPropertyKey(key);
+ if (key in obj) {
+ Object.defineProperty(obj, key, {
+ value: value,
+ enumerable: true,
+ configurable: true,
+ writable: true
+ });
+ } else {
+ obj[key] = value;
+ }
+ return obj;
+}
+function _toPrimitive(input, hint) {
+ if (typeof input !== "object" || input === null) return input;
+ var prim = input[Symbol.toPrimitive];
+ if (prim !== undefined) {
+ var res = prim.call(input, hint || "default");
+ if (typeof res !== "object") return res;
+ throw new TypeError("@@toPrimitive must return a primitive value.");
+ }
+ return (hint === "string" ? String : Number)(input);
+}
+function _toPropertyKey(arg) {
+ var key = _toPrimitive(arg, "string");
+ return typeof key === "symbol" ? key : String(key);
+}
+
+var DEFAULTS = {
+ /**
+ * Enable a modal backdrop, specify `static` for a backdrop
+ * which doesn't close the modal on click.
+ * @type {boolean}
+ */
+ backdrop: true,
+ /**
+ * Show the button on the top-right of the viewer.
+ * @type {boolean}
+ */
+ button: true,
+ /**
+ * Show the navbar.
+ * @type {boolean | number}
+ */
+ navbar: true,
+ /**
+ * Specify the visibility and the content of the title.
+ * @type {boolean | number | Function | Array}
+ */
+ title: true,
+ /**
+ * Show the toolbar.
+ * @type {boolean | number | Object}
+ */
+ toolbar: true,
+ /**
+ * Custom class name(s) to add to the viewer's root element.
+ * @type {string}
+ */
+ className: '',
+ /**
+ * Define where to put the viewer in modal mode.
+ * @type {string | Element}
+ */
+ container: 'body',
+ /**
+ * Filter the images for viewing. Return true if the image is viewable.
+ * @type {Function}
+ */
+ filter: null,
+ /**
+ * Enable to request fullscreen when play.
+ * {@link https://developer.mozilla.org/en-US/docs/Web/API/FullscreenOptions}
+ * @type {boolean|FullscreenOptions}
+ */
+ fullscreen: true,
+ /**
+ * Define the extra attributes to inherit from the original image.
+ * @type {Array}
+ */
+ inheritedAttributes: ['crossOrigin', 'decoding', 'isMap', 'loading', 'referrerPolicy', 'sizes', 'srcset', 'useMap'],
+ /**
+ * Define the initial coverage of the viewing image.
+ * @type {number}
+ */
+ initialCoverage: 0.9,
+ /**
+ * Define the initial index of the image for viewing.
+ * @type {number}
+ */
+ initialViewIndex: 0,
+ /**
+ * Enable inline mode.
+ * @type {boolean}
+ */
+ inline: false,
+ /**
+ * The amount of time to delay between automatically cycling an image when playing.
+ * @type {number}
+ */
+ interval: 5000,
+ /**
+ * Enable keyboard support.
+ * @type {boolean}
+ */
+ keyboard: true,
+ /**
+ * Focus the viewer when initialized.
+ * @type {boolean}
+ */
+ focus: true,
+ /**
+ * Indicate if show a loading spinner when load image or not.
+ * @type {boolean}
+ */
+ loading: true,
+ /**
+ * Indicate if enable loop viewing or not.
+ * @type {boolean}
+ */
+ loop: true,
+ /**
+ * Min width of the viewer in inline mode.
+ * @type {number}
+ */
+ minWidth: 200,
+ /**
+ * Min height of the viewer in inline mode.
+ * @type {number}
+ */
+ minHeight: 100,
+ /**
+ * Enable to move the image.
+ * @type {boolean}
+ */
+ movable: true,
+ /**
+ * Enable to rotate the image.
+ * @type {boolean}
+ */
+ rotatable: true,
+ /**
+ * Enable to scale the image.
+ * @type {boolean}
+ */
+ scalable: true,
+ /**
+ * Enable to zoom the image.
+ * @type {boolean}
+ */
+ zoomable: true,
+ /**
+ * Enable to zoom the current image by dragging on the touch screen.
+ * @type {boolean}
+ */
+ zoomOnTouch: true,
+ /**
+ * Enable to zoom the image by wheeling mouse.
+ * @type {boolean}
+ */
+ zoomOnWheel: true,
+ /**
+ * Enable to slide to the next or previous image by swiping on the touch screen.
+ * @type {boolean}
+ */
+ slideOnTouch: true,
+ /**
+ * Indicate if toggle the image size between its natural size
+ * and initial size when double click on the image or not.
+ * @type {boolean}
+ */
+ toggleOnDblclick: true,
+ /**
+ * Show the tooltip with image ratio (percentage) when zoom in or zoom out.
+ * @type {boolean}
+ */
+ tooltip: true,
+ /**
+ * Enable CSS3 Transition for some special elements.
+ * @type {boolean}
+ */
+ transition: true,
+ /**
+ * Define the CSS `z-index` value of viewer in modal mode.
+ * @type {number}
+ */
+ zIndex: 2015,
+ /**
+ * Define the CSS `z-index` value of viewer in inline mode.
+ * @type {number}
+ */
+ zIndexInline: 0,
+ /**
+ * Define the ratio when zoom the image by wheeling mouse.
+ * @type {number}
+ */
+ zoomRatio: 0.1,
+ /**
+ * Define the min ratio of the image when zoom out.
+ * @type {number}
+ */
+ minZoomRatio: 0.01,
+ /**
+ * Define the max ratio of the image when zoom in.
+ * @type {number}
+ */
+ maxZoomRatio: 100,
+ /**
+ * Define where to get the original image URL for viewing.
+ * @type {string | Function}
+ */
+ url: 'src',
+ /**
+ * Event shortcuts.
+ * @type {Function}
+ */
+ ready: null,
+ show: null,
+ shown: null,
+ hide: null,
+ hidden: null,
+ view: null,
+ viewed: null,
+ move: null,
+ moved: null,
+ rotate: null,
+ rotated: null,
+ scale: null,
+ scaled: null,
+ zoom: null,
+ zoomed: null,
+ play: null,
+ stop: null
+};
+
+var TEMPLATE = '<div class="viewer-container" tabindex="-1" touch-action="none">' + '<div class="viewer-canvas"></div>' + '<div class="viewer-footer">' + '<div class="viewer-title"></div>' + '<div class="viewer-toolbar"></div>' + '<div class="viewer-navbar">' + '<ul class="viewer-list" role="navigation"></ul>' + '</div>' + '</div>' + '<div class="viewer-tooltip" role="alert" aria-hidden="true"></div>' + '<div class="viewer-button" data-viewer-action="mix" role="button"></div>' + '<div class="viewer-player"></div>' + '</div>';
+
+var IS_BROWSER = typeof window !== 'undefined' && typeof window.document !== 'undefined';
+var WINDOW = IS_BROWSER ? window : {};
+var IS_TOUCH_DEVICE = IS_BROWSER && WINDOW.document.documentElement ? 'ontouchstart' in WINDOW.document.documentElement : false;
+var HAS_POINTER_EVENT = IS_BROWSER ? 'PointerEvent' in WINDOW : false;
+var NAMESPACE = 'viewer';
+
+// Actions
+var ACTION_MOVE = 'move';
+var ACTION_SWITCH = 'switch';
+var ACTION_ZOOM = 'zoom';
+
+// Classes
+var CLASS_ACTIVE = "".concat(NAMESPACE, "-active");
+var CLASS_CLOSE = "".concat(NAMESPACE, "-close");
+var CLASS_FADE = "".concat(NAMESPACE, "-fade");
+var CLASS_FIXED = "".concat(NAMESPACE, "-fixed");
+var CLASS_FULLSCREEN = "".concat(NAMESPACE, "-fullscreen");
+var CLASS_FULLSCREEN_EXIT = "".concat(NAMESPACE, "-fullscreen-exit");
+var CLASS_HIDE = "".concat(NAMESPACE, "-hide");
+var CLASS_HIDE_MD_DOWN = "".concat(NAMESPACE, "-hide-md-down");
+var CLASS_HIDE_SM_DOWN = "".concat(NAMESPACE, "-hide-sm-down");
+var CLASS_HIDE_XS_DOWN = "".concat(NAMESPACE, "-hide-xs-down");
+var CLASS_IN = "".concat(NAMESPACE, "-in");
+var CLASS_INVISIBLE = "".concat(NAMESPACE, "-invisible");
+var CLASS_LOADING = "".concat(NAMESPACE, "-loading");
+var CLASS_MOVE = "".concat(NAMESPACE, "-move");
+var CLASS_OPEN = "".concat(NAMESPACE, "-open");
+var CLASS_SHOW = "".concat(NAMESPACE, "-show");
+var CLASS_TRANSITION = "".concat(NAMESPACE, "-transition");
+
+// Native events
+var EVENT_CLICK = 'click';
+var EVENT_DBLCLICK = 'dblclick';
+var EVENT_DRAG_START = 'dragstart';
+var EVENT_FOCUSIN = 'focusin';
+var EVENT_KEY_DOWN = 'keydown';
+var EVENT_LOAD = 'load';
+var EVENT_ERROR = 'error';
+var EVENT_TOUCH_END = IS_TOUCH_DEVICE ? 'touchend touchcancel' : 'mouseup';
+var EVENT_TOUCH_MOVE = IS_TOUCH_DEVICE ? 'touchmove' : 'mousemove';
+var EVENT_TOUCH_START = IS_TOUCH_DEVICE ? 'touchstart' : 'mousedown';
+var EVENT_POINTER_DOWN = HAS_POINTER_EVENT ? 'pointerdown' : EVENT_TOUCH_START;
+var EVENT_POINTER_MOVE = HAS_POINTER_EVENT ? 'pointermove' : EVENT_TOUCH_MOVE;
+var EVENT_POINTER_UP = HAS_POINTER_EVENT ? 'pointerup pointercancel' : EVENT_TOUCH_END;
+var EVENT_RESIZE = 'resize';
+var EVENT_TRANSITION_END = 'transitionend';
+var EVENT_WHEEL = 'wheel';
+
+// Custom events
+var EVENT_READY = 'ready';
+var EVENT_SHOW = 'show';
+var EVENT_SHOWN = 'shown';
+var EVENT_HIDE = 'hide';
+var EVENT_HIDDEN = 'hidden';
+var EVENT_VIEW = 'view';
+var EVENT_VIEWED = 'viewed';
+var EVENT_MOVE = 'move';
+var EVENT_MOVED = 'moved';
+var EVENT_ROTATE = 'rotate';
+var EVENT_ROTATED = 'rotated';
+var EVENT_SCALE = 'scale';
+var EVENT_SCALED = 'scaled';
+var EVENT_ZOOM = 'zoom';
+var EVENT_ZOOMED = 'zoomed';
+var EVENT_PLAY = 'play';
+var EVENT_STOP = 'stop';
+
+// Data keys
+var DATA_ACTION = "".concat(NAMESPACE, "Action");
+
+// RegExps
+var REGEXP_SPACES = /\s\s*/;
+
+// Misc
+var BUTTONS = ['zoom-in', 'zoom-out', 'one-to-one', 'reset', 'prev', 'play', 'next', 'rotate-left', 'rotate-right', 'flip-horizontal', 'flip-vertical'];
+
+/**
+ * Check if the given value is a string.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a string, else `false`.
+ */
+function isString(value) {
+ return typeof value === 'string';
+}
+
+/**
+ * Check if the given value is not a number.
+ */
+var isNaN = Number.isNaN || WINDOW.isNaN;
+
+/**
+ * Check if the given value is a number.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a number, else `false`.
+ */
+function isNumber(value) {
+ return typeof value === 'number' && !isNaN(value);
+}
+
+/**
+ * Check if the given value is undefined.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is undefined, else `false`.
+ */
+function isUndefined(value) {
+ return typeof value === 'undefined';
+}
+
+/**
+ * Check if the given value is an object.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is an object, else `false`.
+ */
+function isObject(value) {
+ return _typeof(value) === 'object' && value !== null;
+}
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+/**
+ * Check if the given value is a plain object.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a plain object, else `false`.
+ */
+function isPlainObject(value) {
+ if (!isObject(value)) {
+ return false;
+ }
+ try {
+ var _constructor = value.constructor;
+ var prototype = _constructor.prototype;
+ return _constructor && prototype && hasOwnProperty.call(prototype, 'isPrototypeOf');
+ } catch (error) {
+ return false;
+ }
+}
+
+/**
+ * Check if the given value is a function.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a function, else `false`.
+ */
+function isFunction(value) {
+ return typeof value === 'function';
+}
+
+/**
+ * Iterate the given data.
+ * @param {*} data - The data to iterate.
+ * @param {Function} callback - The process function for each element.
+ * @returns {*} The original data.
+ */
+function forEach(data, callback) {
+ if (data && isFunction(callback)) {
+ if (Array.isArray(data) || isNumber(data.length) /* array-like */) {
+ var length = data.length;
+ var i;
+ for (i = 0; i < length; i += 1) {
+ if (callback.call(data, data[i], i, data) === false) {
+ break;
+ }
+ }
+ } else if (isObject(data)) {
+ Object.keys(data).forEach(function (key) {
+ callback.call(data, data[key], key, data);
+ });
+ }
+ }
+ return data;
+}
+
+/**
+ * Extend the given object.
+ * @param {*} obj - The object to be extended.
+ * @param {*} args - The rest objects which will be merged to the first object.
+ * @returns {Object} The extended object.
+ */
+var assign = Object.assign || function assign(obj) {
+ for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+ args[_key - 1] = arguments[_key];
+ }
+ if (isObject(obj) && args.length > 0) {
+ args.forEach(function (arg) {
+ if (isObject(arg)) {
+ Object.keys(arg).forEach(function (key) {
+ obj[key] = arg[key];
+ });
+ }
+ });
+ }
+ return obj;
+};
+var REGEXP_SUFFIX = /^(?:width|height|left|top|marginLeft|marginTop)$/;
+
+/**
+ * Apply styles to the given element.
+ * @param {Element} element - The target element.
+ * @param {Object} styles - The styles for applying.
+ */
+function setStyle(element, styles) {
+ var style = element.style;
+ forEach(styles, function (value, property) {
+ if (REGEXP_SUFFIX.test(property) && isNumber(value)) {
+ value += 'px';
+ }
+ style[property] = value;
+ });
+}
+
+/**
+ * Escape a string for using in HTML.
+ * @param {String} value - The string to escape.
+ * @returns {String} Returns the escaped string.
+ */
+function escapeHTMLEntities(value) {
+ return isString(value) ? value.replace(/&(?!amp;|quot;|#39;|lt;|gt;)/g, '&amp;').replace(/"/g, '&quot;').replace(/'/g, '&#39;').replace(/</g, '&lt;').replace(/>/g, '&gt;') : value;
+}
+
+/**
+ * Check if the given element has a special class.
+ * @param {Element} element - The element to check.
+ * @param {string} value - The class to search.
+ * @returns {boolean} Returns `true` if the special class was found.
+ */
+function hasClass(element, value) {
+ if (!element || !value) {
+ return false;
+ }
+ return element.classList ? element.classList.contains(value) : element.className.indexOf(value) > -1;
+}
+
+/**
+ * Add classes to the given element.
+ * @param {Element} element - The target element.
+ * @param {string} value - The classes to be added.
+ */
+function addClass(element, value) {
+ if (!element || !value) {
+ return;
+ }
+ if (isNumber(element.length)) {
+ forEach(element, function (elem) {
+ addClass(elem, value);
+ });
+ return;
+ }
+ if (element.classList) {
+ element.classList.add(value);
+ return;
+ }
+ var className = element.className.trim();
+ if (!className) {
+ element.className = value;
+ } else if (className.indexOf(value) < 0) {
+ element.className = "".concat(className, " ").concat(value);
+ }
+}
+
+/**
+ * Remove classes from the given element.
+ * @param {Element} element - The target element.
+ * @param {string} value - The classes to be removed.
+ */
+function removeClass(element, value) {
+ if (!element || !value) {
+ return;
+ }
+ if (isNumber(element.length)) {
+ forEach(element, function (elem) {
+ removeClass(elem, value);
+ });
+ return;
+ }
+ if (element.classList) {
+ element.classList.remove(value);
+ return;
+ }
+ if (element.className.indexOf(value) >= 0) {
+ element.className = element.className.replace(value, '');
+ }
+}
+
+/**
+ * Add or remove classes from the given element.
+ * @param {Element} element - The target element.
+ * @param {string} value - The classes to be toggled.
+ * @param {boolean} added - Add only.
+ */
+function toggleClass(element, value, added) {
+ if (!value) {
+ return;
+ }
+ if (isNumber(element.length)) {
+ forEach(element, function (elem) {
+ toggleClass(elem, value, added);
+ });
+ return;
+ }
+
+ // IE10-11 doesn't support the second parameter of `classList.toggle`
+ if (added) {
+ addClass(element, value);
+ } else {
+ removeClass(element, value);
+ }
+}
+var REGEXP_HYPHENATE = /([a-z\d])([A-Z])/g;
+
+/**
+ * Transform the given string from camelCase to kebab-case
+ * @param {string} value - The value to transform.
+ * @returns {string} The transformed value.
+ */
+function hyphenate(value) {
+ return value.replace(REGEXP_HYPHENATE, '$1-$2').toLowerCase();
+}
+
+/**
+ * Get data from the given element.
+ * @param {Element} element - The target element.
+ * @param {string} name - The data key to get.
+ * @returns {string} The data value.
+ */
+function getData(element, name) {
+ if (isObject(element[name])) {
+ return element[name];
+ }
+ if (element.dataset) {
+ return element.dataset[name];
+ }
+ return element.getAttribute("data-".concat(hyphenate(name)));
+}
+
+/**
+ * Set data to the given element.
+ * @param {Element} element - The target element.
+ * @param {string} name - The data key to set.
+ * @param {string} data - The data value.
+ */
+function setData(element, name, data) {
+ if (isObject(data)) {
+ element[name] = data;
+ } else if (element.dataset) {
+ element.dataset[name] = data;
+ } else {
+ element.setAttribute("data-".concat(hyphenate(name)), data);
+ }
+}
+var onceSupported = function () {
+ var supported = false;
+ if (IS_BROWSER) {
+ var once = false;
+ var listener = function listener() {};
+ var options = Object.defineProperty({}, 'once', {
+ get: function get() {
+ supported = true;
+ return once;
+ },
+ /**
+ * This setter can fix a `TypeError` in strict mode
+ * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Getter_only}
+ * @param {boolean} value - The value to set
+ */
+ set: function set(value) {
+ once = value;
+ }
+ });
+ WINDOW.addEventListener('test', listener, options);
+ WINDOW.removeEventListener('test', listener, options);
+ }
+ return supported;
+}();
+
+/**
+ * Remove event listener from the target element.
+ * @param {Element} element - The event target.
+ * @param {string} type - The event type(s).
+ * @param {Function} listener - The event listener.
+ * @param {Object} options - The event options.
+ */
+function removeListener(element, type, listener) {
+ var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
+ var handler = listener;
+ type.trim().split(REGEXP_SPACES).forEach(function (event) {
+ if (!onceSupported) {
+ var listeners = element.listeners;
+ if (listeners && listeners[event] && listeners[event][listener]) {
+ handler = listeners[event][listener];
+ delete listeners[event][listener];
+ if (Object.keys(listeners[event]).length === 0) {
+ delete listeners[event];
+ }
+ if (Object.keys(listeners).length === 0) {
+ delete element.listeners;
+ }
+ }
+ }
+ element.removeEventListener(event, handler, options);
+ });
+}
+
+/**
+ * Add event listener to the target element.
+ * @param {Element} element - The event target.
+ * @param {string} type - The event type(s).
+ * @param {Function} listener - The event listener.
+ * @param {Object} options - The event options.
+ */
+function addListener(element, type, listener) {
+ var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
+ var _handler = listener;
+ type.trim().split(REGEXP_SPACES).forEach(function (event) {
+ if (options.once && !onceSupported) {
+ var _element$listeners = element.listeners,
+ listeners = _element$listeners === void 0 ? {} : _element$listeners;
+ _handler = function handler() {
+ delete listeners[event][listener];
+ element.removeEventListener(event, _handler, options);
+ for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+ args[_key2] = arguments[_key2];
+ }
+ listener.apply(element, args);
+ };
+ if (!listeners[event]) {
+ listeners[event] = {};
+ }
+ if (listeners[event][listener]) {
+ element.removeEventListener(event, listeners[event][listener], options);
+ }
+ listeners[event][listener] = _handler;
+ element.listeners = listeners;
+ }
+ element.addEventListener(event, _handler, options);
+ });
+}
+
+/**
+ * Dispatch event on the target element.
+ * @param {Element} element - The event target.
+ * @param {string} type - The event type(s).
+ * @param {Object} data - The additional event data.
+ * @param {Object} options - The additional event options.
+ * @returns {boolean} Indicate if the event is default prevented or not.
+ */
+function dispatchEvent(element, type, data, options) {
+ var event;
+
+ // Event and CustomEvent on IE9-11 are global objects, not constructors
+ if (isFunction(Event) && isFunction(CustomEvent)) {
+ event = new CustomEvent(type, _objectSpread2({
+ bubbles: true,
+ cancelable: true,
+ detail: data
+ }, options));
+ } else {
+ event = document.createEvent('CustomEvent');
+ event.initCustomEvent(type, true, true, data);
+ }
+ return element.dispatchEvent(event);
+}
+
+/**
+ * Get the offset base on the document.
+ * @param {Element} element - The target element.
+ * @returns {Object} The offset data.
+ */
+function getOffset(element) {
+ var box = element.getBoundingClientRect();
+ return {
+ left: box.left + (window.pageXOffset - document.documentElement.clientLeft),
+ top: box.top + (window.pageYOffset - document.documentElement.clientTop)
+ };
+}
+
+/**
+ * Get transforms base on the given object.
+ * @param {Object} obj - The target object.
+ * @returns {string} A string contains transform values.
+ */
+function getTransforms(_ref) {
+ var rotate = _ref.rotate,
+ scaleX = _ref.scaleX,
+ scaleY = _ref.scaleY,
+ translateX = _ref.translateX,
+ translateY = _ref.translateY;
+ var values = [];
+ if (isNumber(translateX) && translateX !== 0) {
+ values.push("translateX(".concat(translateX, "px)"));
+ }
+ if (isNumber(translateY) && translateY !== 0) {
+ values.push("translateY(".concat(translateY, "px)"));
+ }
+
+ // Rotate should come first before scale to match orientation transform
+ if (isNumber(rotate) && rotate !== 0) {
+ values.push("rotate(".concat(rotate, "deg)"));
+ }
+ if (isNumber(scaleX) && scaleX !== 1) {
+ values.push("scaleX(".concat(scaleX, ")"));
+ }
+ if (isNumber(scaleY) && scaleY !== 1) {
+ values.push("scaleY(".concat(scaleY, ")"));
+ }
+ var transform = values.length ? values.join(' ') : 'none';
+ return {
+ WebkitTransform: transform,
+ msTransform: transform,
+ transform: transform
+ };
+}
+
+/**
+ * Get an image name from an image url.
+ * @param {string} url - The target url.
+ * @example
+ * // picture.jpg
+ * getImageNameFromURL('https://domain.com/path/to/picture.jpg?size=1280×960')
+ * @returns {string} A string contains the image name.
+ */
+function getImageNameFromURL(url) {
+ return isString(url) ? decodeURIComponent(url.replace(/^.*\//, '').replace(/[?&#].*$/, '')) : '';
+}
+var IS_SAFARI = WINDOW.navigator && /(Macintosh|iPhone|iPod|iPad).*AppleWebKit/i.test(WINDOW.navigator.userAgent);
+
+/**
+ * Get an image's natural sizes.
+ * @param {string} image - The target image.
+ * @param {Object} options - The viewer options.
+ * @param {Function} callback - The callback function.
+ * @returns {HTMLImageElement} The new image.
+ */
+function getImageNaturalSizes(image, options, callback) {
+ var newImage = document.createElement('img');
+
+ // Modern browsers (except Safari)
+ if (image.naturalWidth && !IS_SAFARI) {
+ callback(image.naturalWidth, image.naturalHeight);
+ return newImage;
+ }
+ var body = document.body || document.documentElement;
+ newImage.onload = function () {
+ callback(newImage.width, newImage.height);
+ if (!IS_SAFARI) {
+ body.removeChild(newImage);
+ }
+ };
+ forEach(options.inheritedAttributes, function (name) {
+ var value = image.getAttribute(name);
+ if (value !== null) {
+ newImage.setAttribute(name, value);
+ }
+ });
+ newImage.src = image.src;
+
+ // iOS Safari will convert the image automatically
+ // with its orientation once append it into DOM
+ if (!IS_SAFARI) {
+ newImage.style.cssText = 'left:0;' + 'max-height:none!important;' + 'max-width:none!important;' + 'min-height:0!important;' + 'min-width:0!important;' + 'opacity:0;' + 'position:absolute;' + 'top:0;' + 'z-index:-1;';
+ body.appendChild(newImage);
+ }
+ return newImage;
+}
+
+/**
+ * Get the related class name of a responsive type number.
+ * @param {string} type - The responsive type.
+ * @returns {string} The related class name.
+ */
+function getResponsiveClass(type) {
+ switch (type) {
+ case 2:
+ return CLASS_HIDE_XS_DOWN;
+ case 3:
+ return CLASS_HIDE_SM_DOWN;
+ case 4:
+ return CLASS_HIDE_MD_DOWN;
+ default:
+ return '';
+ }
+}
+
+/**
+ * Get the max ratio of a group of pointers.
+ * @param {string} pointers - The target pointers.
+ * @returns {number} The result ratio.
+ */
+function getMaxZoomRatio(pointers) {
+ var pointers2 = _objectSpread2({}, pointers);
+ var ratios = [];
+ forEach(pointers, function (pointer, pointerId) {
+ delete pointers2[pointerId];
+ forEach(pointers2, function (pointer2) {
+ var x1 = Math.abs(pointer.startX - pointer2.startX);
+ var y1 = Math.abs(pointer.startY - pointer2.startY);
+ var x2 = Math.abs(pointer.endX - pointer2.endX);
+ var y2 = Math.abs(pointer.endY - pointer2.endY);
+ var z1 = Math.sqrt(x1 * x1 + y1 * y1);
+ var z2 = Math.sqrt(x2 * x2 + y2 * y2);
+ var ratio = (z2 - z1) / z1;
+ ratios.push(ratio);
+ });
+ });
+ ratios.sort(function (a, b) {
+ return Math.abs(a) < Math.abs(b);
+ });
+ return ratios[0];
+}
+
+/**
+ * Get a pointer from an event object.
+ * @param {Object} event - The target event object.
+ * @param {boolean} endOnly - Indicates if only returns the end point coordinate or not.
+ * @returns {Object} The result pointer contains start and/or end point coordinates.
+ */
+function getPointer(_ref2, endOnly) {
+ var pageX = _ref2.pageX,
+ pageY = _ref2.pageY;
+ var end = {
+ endX: pageX,
+ endY: pageY
+ };
+ return endOnly ? end : _objectSpread2({
+ timeStamp: Date.now(),
+ startX: pageX,
+ startY: pageY
+ }, end);
+}
+
+/**
+ * Get the center point coordinate of a group of pointers.
+ * @param {Object} pointers - The target pointers.
+ * @returns {Object} The center point coordinate.
+ */
+function getPointersCenter(pointers) {
+ var pageX = 0;
+ var pageY = 0;
+ var count = 0;
+ forEach(pointers, function (_ref3) {
+ var startX = _ref3.startX,
+ startY = _ref3.startY;
+ pageX += startX;
+ pageY += startY;
+ count += 1;
+ });
+ pageX /= count;
+ pageY /= count;
+ return {
+ pageX: pageX,
+ pageY: pageY
+ };
+}
+
+var render = {
+ render: function render() {
+ this.initContainer();
+ this.initViewer();
+ this.initList();
+ this.renderViewer();
+ },
+ initBody: function initBody() {
+ var ownerDocument = this.element.ownerDocument;
+ var body = ownerDocument.body || ownerDocument.documentElement;
+ this.body = body;
+ this.scrollbarWidth = window.innerWidth - ownerDocument.documentElement.clientWidth;
+ this.initialBodyPaddingRight = body.style.paddingRight;
+ this.initialBodyComputedPaddingRight = window.getComputedStyle(body).paddingRight;
+ },
+ initContainer: function initContainer() {
+ this.containerData = {
+ width: window.innerWidth,
+ height: window.innerHeight
+ };
+ },
+ initViewer: function initViewer() {
+ var options = this.options,
+ parent = this.parent;
+ var viewerData;
+ if (options.inline) {
+ viewerData = {
+ width: Math.max(parent.offsetWidth, options.minWidth),
+ height: Math.max(parent.offsetHeight, options.minHeight)
+ };
+ this.parentData = viewerData;
+ }
+ if (this.fulled || !viewerData) {
+ viewerData = this.containerData;
+ }
+ this.viewerData = assign({}, viewerData);
+ },
+ renderViewer: function renderViewer() {
+ if (this.options.inline && !this.fulled) {
+ setStyle(this.viewer, this.viewerData);
+ }
+ },
+ initList: function initList() {
+ var _this = this;
+ var element = this.element,
+ options = this.options,
+ list = this.list;
+ var items = [];
+
+ // initList may be called in this.update, so should keep idempotent
+ list.innerHTML = '';
+ forEach(this.images, function (image, index) {
+ var src = image.src;
+ var alt = image.alt || getImageNameFromURL(src);
+ var url = _this.getImageURL(image);
+ if (src || url) {
+ var item = document.createElement('li');
+ var img = document.createElement('img');
+ forEach(options.inheritedAttributes, function (name) {
+ var value = image.getAttribute(name);
+ if (value !== null) {
+ img.setAttribute(name, value);
+ }
+ });
+ if (options.navbar) {
+ img.src = src || url;
+ }
+ img.alt = alt;
+ img.setAttribute('data-original-url', url || src);
+ item.setAttribute('data-index', index);
+ item.setAttribute('data-viewer-action', 'view');
+ item.setAttribute('role', 'button');
+ if (options.keyboard) {
+ item.setAttribute('tabindex', 0);
+ }
+ item.appendChild(img);
+ list.appendChild(item);
+ items.push(item);
+ }
+ });
+ this.items = items;
+ forEach(items, function (item) {
+ var image = item.firstElementChild;
+ var onLoad;
+ var onError;
+ setData(image, 'filled', true);
+ if (options.loading) {
+ addClass(item, CLASS_LOADING);
+ }
+ addListener(image, EVENT_LOAD, onLoad = function onLoad(event) {
+ removeListener(image, EVENT_ERROR, onError);
+ if (options.loading) {
+ removeClass(item, CLASS_LOADING);
+ }
+ _this.loadImage(event);
+ }, {
+ once: true
+ });
+ addListener(image, EVENT_ERROR, onError = function onError() {
+ removeListener(image, EVENT_LOAD, onLoad);
+ if (options.loading) {
+ removeClass(item, CLASS_LOADING);
+ }
+ }, {
+ once: true
+ });
+ });
+ if (options.transition) {
+ addListener(element, EVENT_VIEWED, function () {
+ addClass(list, CLASS_TRANSITION);
+ }, {
+ once: true
+ });
+ }
+ },
+ renderList: function renderList() {
+ var index = this.index;
+ var item = this.items[index];
+ if (!item) {
+ return;
+ }
+ var next = item.nextElementSibling;
+ var gutter = parseInt(window.getComputedStyle(next || item).marginLeft, 10);
+ var offsetWidth = item.offsetWidth;
+ var outerWidth = offsetWidth + gutter;
+
+ // Place the active item in the center of the screen
+ setStyle(this.list, assign({
+ width: outerWidth * this.length - gutter
+ }, getTransforms({
+ translateX: (this.viewerData.width - offsetWidth) / 2 - outerWidth * index
+ })));
+ },
+ resetList: function resetList() {
+ var list = this.list;
+ list.innerHTML = '';
+ removeClass(list, CLASS_TRANSITION);
+ setStyle(list, getTransforms({
+ translateX: 0
+ }));
+ },
+ initImage: function initImage(done) {
+ var _this2 = this;
+ var options = this.options,
+ image = this.image,
+ viewerData = this.viewerData;
+ var footerHeight = this.footer.offsetHeight;
+ var viewerWidth = viewerData.width;
+ var viewerHeight = Math.max(viewerData.height - footerHeight, footerHeight);
+ var oldImageData = this.imageData || {};
+ var sizingImage;
+ this.imageInitializing = {
+ abort: function abort() {
+ sizingImage.onload = null;
+ }
+ };
+ sizingImage = getImageNaturalSizes(image, options, function (naturalWidth, naturalHeight) {
+ var aspectRatio = naturalWidth / naturalHeight;
+ var initialCoverage = Math.max(0, Math.min(1, options.initialCoverage));
+ var width = viewerWidth;
+ var height = viewerHeight;
+ _this2.imageInitializing = false;
+ if (viewerHeight * aspectRatio > viewerWidth) {
+ height = viewerWidth / aspectRatio;
+ } else {
+ width = viewerHeight * aspectRatio;
+ }
+ initialCoverage = isNumber(initialCoverage) ? initialCoverage : 0.9;
+ width = Math.min(width * initialCoverage, naturalWidth);
+ height = Math.min(height * initialCoverage, naturalHeight);
+ var left = (viewerWidth - width) / 2;
+ var top = (viewerHeight - height) / 2;
+ var imageData = {
+ left: left,
+ top: top,
+ x: left,
+ y: top,
+ width: width,
+ height: height,
+ oldRatio: 1,
+ ratio: width / naturalWidth,
+ aspectRatio: aspectRatio,
+ naturalWidth: naturalWidth,
+ naturalHeight: naturalHeight
+ };
+ var initialImageData = assign({}, imageData);
+ if (options.rotatable) {
+ imageData.rotate = oldImageData.rotate || 0;
+ initialImageData.rotate = 0;
+ }
+ if (options.scalable) {
+ imageData.scaleX = oldImageData.scaleX || 1;
+ imageData.scaleY = oldImageData.scaleY || 1;
+ initialImageData.scaleX = 1;
+ initialImageData.scaleY = 1;
+ }
+ _this2.imageData = imageData;
+ _this2.initialImageData = initialImageData;
+ if (done) {
+ done();
+ }
+ });
+ },
+ renderImage: function renderImage(done) {
+ var _this3 = this;
+ var image = this.image,
+ imageData = this.imageData;
+ setStyle(image, assign({
+ width: imageData.width,
+ height: imageData.height,
+ // XXX: Not to use translateX/Y to avoid image shaking when zooming
+ marginLeft: imageData.x,
+ marginTop: imageData.y
+ }, getTransforms(imageData)));
+ if (done) {
+ if ((this.viewing || this.moving || this.rotating || this.scaling || this.zooming) && this.options.transition && hasClass(image, CLASS_TRANSITION)) {
+ var onTransitionEnd = function onTransitionEnd() {
+ _this3.imageRendering = false;
+ done();
+ };
+ this.imageRendering = {
+ abort: function abort() {
+ removeListener(image, EVENT_TRANSITION_END, onTransitionEnd);
+ }
+ };
+ addListener(image, EVENT_TRANSITION_END, onTransitionEnd, {
+ once: true
+ });
+ } else {
+ done();
+ }
+ }
+ },
+ resetImage: function resetImage() {
+ // this.image only defined after viewed
+ if (this.viewing || this.viewed) {
+ var image = this.image;
+ if (this.viewing) {
+ this.viewing.abort();
+ }
+ image.parentNode.removeChild(image);
+ this.image = null;
+ }
+ }
+};
+
+var events = {
+ bind: function bind() {
+ var options = this.options,
+ viewer = this.viewer,
+ canvas = this.canvas;
+ var document = this.element.ownerDocument;
+ addListener(viewer, EVENT_CLICK, this.onClick = this.click.bind(this));
+ addListener(viewer, EVENT_DRAG_START, this.onDragStart = this.dragstart.bind(this));
+ addListener(canvas, EVENT_POINTER_DOWN, this.onPointerDown = this.pointerdown.bind(this));
+ addListener(document, EVENT_POINTER_MOVE, this.onPointerMove = this.pointermove.bind(this));
+ addListener(document, EVENT_POINTER_UP, this.onPointerUp = this.pointerup.bind(this));
+ addListener(document, EVENT_KEY_DOWN, this.onKeyDown = this.keydown.bind(this));
+ addListener(window, EVENT_RESIZE, this.onResize = this.resize.bind(this));
+ if (options.zoomable && options.zoomOnWheel) {
+ addListener(viewer, EVENT_WHEEL, this.onWheel = this.wheel.bind(this), {
+ passive: false,
+ capture: true
+ });
+ }
+ if (options.toggleOnDblclick) {
+ addListener(canvas, EVENT_DBLCLICK, this.onDblclick = this.dblclick.bind(this));
+ }
+ },
+ unbind: function unbind() {
+ var options = this.options,
+ viewer = this.viewer,
+ canvas = this.canvas;
+ var document = this.element.ownerDocument;
+ removeListener(viewer, EVENT_CLICK, this.onClick);
+ removeListener(viewer, EVENT_DRAG_START, this.onDragStart);
+ removeListener(canvas, EVENT_POINTER_DOWN, this.onPointerDown);
+ removeListener(document, EVENT_POINTER_MOVE, this.onPointerMove);
+ removeListener(document, EVENT_POINTER_UP, this.onPointerUp);
+ removeListener(document, EVENT_KEY_DOWN, this.onKeyDown);
+ removeListener(window, EVENT_RESIZE, this.onResize);
+ if (options.zoomable && options.zoomOnWheel) {
+ removeListener(viewer, EVENT_WHEEL, this.onWheel, {
+ passive: false,
+ capture: true
+ });
+ }
+ if (options.toggleOnDblclick) {
+ removeListener(canvas, EVENT_DBLCLICK, this.onDblclick);
+ }
+ }
+};
+
+var handlers = {
+ click: function click(event) {
+ var options = this.options,
+ imageData = this.imageData;
+ var target = event.target;
+ var action = getData(target, DATA_ACTION);
+ if (!action && target.localName === 'img' && target.parentElement.localName === 'li') {
+ target = target.parentElement;
+ action = getData(target, DATA_ACTION);
+ }
+
+ // Cancel the emulated click when the native click event was triggered.
+ if (IS_TOUCH_DEVICE && event.isTrusted && target === this.canvas) {
+ clearTimeout(this.clickCanvasTimeout);
+ }
+ switch (action) {
+ case 'mix':
+ if (this.played) {
+ this.stop();
+ } else if (options.inline) {
+ if (this.fulled) {
+ this.exit();
+ } else {
+ this.full();
+ }
+ } else {
+ this.hide();
+ }
+ break;
+ case 'hide':
+ if (!this.pointerMoved) {
+ this.hide();
+ }
+ break;
+ case 'view':
+ this.view(getData(target, 'index'));
+ break;
+ case 'zoom-in':
+ this.zoom(0.1, true);
+ break;
+ case 'zoom-out':
+ this.zoom(-0.1, true);
+ break;
+ case 'one-to-one':
+ this.toggle();
+ break;
+ case 'reset':
+ this.reset();
+ break;
+ case 'prev':
+ this.prev(options.loop);
+ break;
+ case 'play':
+ this.play(options.fullscreen);
+ break;
+ case 'next':
+ this.next(options.loop);
+ break;
+ case 'rotate-left':
+ this.rotate(-90);
+ break;
+ case 'rotate-right':
+ this.rotate(90);
+ break;
+ case 'flip-horizontal':
+ this.scaleX(-imageData.scaleX || -1);
+ break;
+ case 'flip-vertical':
+ this.scaleY(-imageData.scaleY || -1);
+ break;
+ default:
+ if (this.played) {
+ this.stop();
+ }
+ }
+ },
+ dblclick: function dblclick(event) {
+ event.preventDefault();
+ if (this.viewed && event.target === this.image) {
+ // Cancel the emulated double click when the native dblclick event was triggered.
+ if (IS_TOUCH_DEVICE && event.isTrusted) {
+ clearTimeout(this.doubleClickImageTimeout);
+ }
+
+ // XXX: No pageX/Y properties in custom event, fallback to the original event.
+ this.toggle(event.isTrusted ? event : event.detail && event.detail.originalEvent);
+ }
+ },
+ load: function load() {
+ var _this = this;
+ if (this.timeout) {
+ clearTimeout(this.timeout);
+ this.timeout = false;
+ }
+ var element = this.element,
+ options = this.options,
+ image = this.image,
+ index = this.index,
+ viewerData = this.viewerData;
+ removeClass(image, CLASS_INVISIBLE);
+ if (options.loading) {
+ removeClass(this.canvas, CLASS_LOADING);
+ }
+ image.style.cssText = 'height:0;' + "margin-left:".concat(viewerData.width / 2, "px;") + "margin-top:".concat(viewerData.height / 2, "px;") + 'max-width:none!important;' + 'position:relative;' + 'width:0;';
+ this.initImage(function () {
+ toggleClass(image, CLASS_MOVE, options.movable);
+ toggleClass(image, CLASS_TRANSITION, options.transition);
+ _this.renderImage(function () {
+ _this.viewed = true;
+ _this.viewing = false;
+ if (isFunction(options.viewed)) {
+ addListener(element, EVENT_VIEWED, options.viewed, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_VIEWED, {
+ originalImage: _this.images[index],
+ index: index,
+ image: image
+ }, {
+ cancelable: false
+ });
+ });
+ });
+ },
+ loadImage: function loadImage(event) {
+ var image = event.target;
+ var parent = image.parentNode;
+ var parentWidth = parent.offsetWidth || 30;
+ var parentHeight = parent.offsetHeight || 50;
+ var filled = !!getData(image, 'filled');
+ getImageNaturalSizes(image, this.options, function (naturalWidth, naturalHeight) {
+ var aspectRatio = naturalWidth / naturalHeight;
+ var width = parentWidth;
+ var height = parentHeight;
+ if (parentHeight * aspectRatio > parentWidth) {
+ if (filled) {
+ width = parentHeight * aspectRatio;
+ } else {
+ height = parentWidth / aspectRatio;
+ }
+ } else if (filled) {
+ height = parentWidth / aspectRatio;
+ } else {
+ width = parentHeight * aspectRatio;
+ }
+ setStyle(image, assign({
+ width: width,
+ height: height
+ }, getTransforms({
+ translateX: (parentWidth - width) / 2,
+ translateY: (parentHeight - height) / 2
+ })));
+ });
+ },
+ keydown: function keydown(event) {
+ var options = this.options;
+ if (!options.keyboard) {
+ return;
+ }
+ var keyCode = event.keyCode || event.which || event.charCode;
+ switch (keyCode) {
+ // Enter
+ case 13:
+ if (this.viewer.contains(event.target)) {
+ this.click(event);
+ }
+ break;
+ }
+ if (!this.fulled) {
+ return;
+ }
+ switch (keyCode) {
+ // Escape
+ case 27:
+ if (this.played) {
+ this.stop();
+ } else if (options.inline) {
+ if (this.fulled) {
+ this.exit();
+ }
+ } else {
+ this.hide();
+ }
+ break;
+
+ // Space
+ case 32:
+ if (this.played) {
+ this.stop();
+ }
+ break;
+
+ // ArrowLeft
+ case 37:
+ if (this.played && this.playing) {
+ this.playing.prev();
+ } else {
+ this.prev(options.loop);
+ }
+ break;
+
+ // ArrowUp
+ case 38:
+ // Prevent scroll on Firefox
+ event.preventDefault();
+
+ // Zoom in
+ this.zoom(options.zoomRatio, true);
+ break;
+
+ // ArrowRight
+ case 39:
+ if (this.played && this.playing) {
+ this.playing.next();
+ } else {
+ this.next(options.loop);
+ }
+ break;
+
+ // ArrowDown
+ case 40:
+ // Prevent scroll on Firefox
+ event.preventDefault();
+
+ // Zoom out
+ this.zoom(-options.zoomRatio, true);
+ break;
+
+ // Ctrl + 0
+ case 48:
+ // Fall through
+
+ // Ctrl + 1
+ // eslint-disable-next-line no-fallthrough
+ case 49:
+ if (event.ctrlKey) {
+ event.preventDefault();
+ this.toggle();
+ }
+ break;
+ }
+ },
+ dragstart: function dragstart(event) {
+ if (event.target.localName === 'img') {
+ event.preventDefault();
+ }
+ },
+ pointerdown: function pointerdown(event) {
+ var options = this.options,
+ pointers = this.pointers;
+ var buttons = event.buttons,
+ button = event.button;
+ this.pointerMoved = false;
+ if (!this.viewed || this.showing || this.viewing || this.hiding
+
+ // Handle mouse event and pointer event and ignore touch event
+ || (event.type === 'mousedown' || event.type === 'pointerdown' && event.pointerType === 'mouse') && (
+ // No primary button (Usually the left button)
+ isNumber(buttons) && buttons !== 1 || isNumber(button) && button !== 0
+
+ // Open context menu
+ || event.ctrlKey)) {
+ return;
+ }
+
+ // Prevent default behaviours as page zooming in touch devices.
+ event.preventDefault();
+ if (event.changedTouches) {
+ forEach(event.changedTouches, function (touch) {
+ pointers[touch.identifier] = getPointer(touch);
+ });
+ } else {
+ pointers[event.pointerId || 0] = getPointer(event);
+ }
+ var action = options.movable ? ACTION_MOVE : false;
+ if (options.zoomOnTouch && options.zoomable && Object.keys(pointers).length > 1) {
+ action = ACTION_ZOOM;
+ } else if (options.slideOnTouch && (event.pointerType === 'touch' || event.type === 'touchstart') && this.isSwitchable()) {
+ action = ACTION_SWITCH;
+ }
+ if (options.transition && (action === ACTION_MOVE || action === ACTION_ZOOM)) {
+ removeClass(this.image, CLASS_TRANSITION);
+ }
+ this.action = action;
+ },
+ pointermove: function pointermove(event) {
+ var pointers = this.pointers,
+ action = this.action;
+ if (!this.viewed || !action) {
+ return;
+ }
+ event.preventDefault();
+ this.pointerMoved = true;
+ if (event.changedTouches) {
+ forEach(event.changedTouches, function (touch) {
+ assign(pointers[touch.identifier] || {}, getPointer(touch, true));
+ });
+ } else {
+ assign(pointers[event.pointerId || 0] || {}, getPointer(event, true));
+ }
+ this.change(event);
+ },
+ pointerup: function pointerup(event) {
+ var _this2 = this;
+ var options = this.options,
+ action = this.action,
+ pointers = this.pointers;
+ var pointer;
+ if (event.changedTouches) {
+ forEach(event.changedTouches, function (touch) {
+ pointer = pointers[touch.identifier];
+ delete pointers[touch.identifier];
+ });
+ } else {
+ pointer = pointers[event.pointerId || 0];
+ delete pointers[event.pointerId || 0];
+ }
+ if (!action) {
+ return;
+ }
+ event.preventDefault();
+ if (options.transition && (action === ACTION_MOVE || action === ACTION_ZOOM)) {
+ addClass(this.image, CLASS_TRANSITION);
+ }
+ this.action = false;
+
+ // Emulate click and double click in touch devices to support backdrop and image zooming (#210).
+ if (IS_TOUCH_DEVICE && action !== ACTION_ZOOM && pointer && Date.now() - pointer.timeStamp < 500) {
+ clearTimeout(this.clickCanvasTimeout);
+ clearTimeout(this.doubleClickImageTimeout);
+ if (options.toggleOnDblclick && this.viewed && event.target === this.image) {
+ if (this.imageClicked) {
+ this.imageClicked = false;
+
+ // This timeout will be cleared later when a native dblclick event is triggering
+ this.doubleClickImageTimeout = setTimeout(function () {
+ dispatchEvent(_this2.image, EVENT_DBLCLICK, {
+ originalEvent: event
+ });
+ }, 50);
+ } else {
+ this.imageClicked = true;
+
+ // The default timing of a double click in Windows is 500 ms
+ this.doubleClickImageTimeout = setTimeout(function () {
+ _this2.imageClicked = false;
+ }, 500);
+ }
+ } else {
+ this.imageClicked = false;
+ if (options.backdrop && options.backdrop !== 'static' && event.target === this.canvas) {
+ // This timeout will be cleared later when a native click event is triggering
+ this.clickCanvasTimeout = setTimeout(function () {
+ dispatchEvent(_this2.canvas, EVENT_CLICK, {
+ originalEvent: event
+ });
+ }, 50);
+ }
+ }
+ }
+ },
+ resize: function resize() {
+ var _this3 = this;
+ if (!this.isShown || this.hiding) {
+ return;
+ }
+ if (this.fulled) {
+ this.close();
+ this.initBody();
+ this.open();
+ }
+ this.initContainer();
+ this.initViewer();
+ this.renderViewer();
+ this.renderList();
+ if (this.viewed) {
+ this.initImage(function () {
+ _this3.renderImage();
+ });
+ }
+ if (this.played) {
+ if (this.options.fullscreen && this.fulled && !(document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement)) {
+ this.stop();
+ return;
+ }
+ forEach(this.player.getElementsByTagName('img'), function (image) {
+ addListener(image, EVENT_LOAD, _this3.loadImage.bind(_this3), {
+ once: true
+ });
+ dispatchEvent(image, EVENT_LOAD);
+ });
+ }
+ },
+ wheel: function wheel(event) {
+ var _this4 = this;
+ if (!this.viewed) {
+ return;
+ }
+ event.preventDefault();
+
+ // Limit wheel speed to prevent zoom too fast
+ if (this.wheeling) {
+ return;
+ }
+ this.wheeling = true;
+ setTimeout(function () {
+ _this4.wheeling = false;
+ }, 50);
+ var ratio = Number(this.options.zoomRatio) || 0.1;
+ var delta = 1;
+ if (event.deltaY) {
+ delta = event.deltaY > 0 ? 1 : -1;
+ } else if (event.wheelDelta) {
+ delta = -event.wheelDelta / 120;
+ } else if (event.detail) {
+ delta = event.detail > 0 ? 1 : -1;
+ }
+ this.zoom(-delta * ratio, true, null, event);
+ }
+};
+
+var methods = {
+ /** Show the viewer (only available in modal mode)
+ * @param {boolean} [immediate=false] - Indicates if show the viewer immediately or not.
+ * @returns {Viewer} this
+ */
+ show: function show() {
+ var immediate = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var element = this.element,
+ options = this.options;
+ if (options.inline || this.showing || this.isShown || this.showing) {
+ return this;
+ }
+ if (!this.ready) {
+ this.build();
+ if (this.ready) {
+ this.show(immediate);
+ }
+ return this;
+ }
+ if (isFunction(options.show)) {
+ addListener(element, EVENT_SHOW, options.show, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_SHOW) === false || !this.ready) {
+ return this;
+ }
+ if (this.hiding) {
+ this.transitioning.abort();
+ }
+ this.showing = true;
+ this.open();
+ var viewer = this.viewer;
+ removeClass(viewer, CLASS_HIDE);
+ viewer.setAttribute('role', 'dialog');
+ viewer.setAttribute('aria-labelledby', this.title.id);
+ viewer.setAttribute('aria-modal', true);
+ viewer.removeAttribute('aria-hidden');
+ if (options.transition && !immediate) {
+ var shown = this.shown.bind(this);
+ this.transitioning = {
+ abort: function abort() {
+ removeListener(viewer, EVENT_TRANSITION_END, shown);
+ removeClass(viewer, CLASS_IN);
+ }
+ };
+ addClass(viewer, CLASS_TRANSITION);
+
+ // Force reflow to enable CSS3 transition
+ viewer.initialOffsetWidth = viewer.offsetWidth;
+ addListener(viewer, EVENT_TRANSITION_END, shown, {
+ once: true
+ });
+ addClass(viewer, CLASS_IN);
+ } else {
+ addClass(viewer, CLASS_IN);
+ this.shown();
+ }
+ return this;
+ },
+ /**
+ * Hide the viewer (only available in modal mode)
+ * @param {boolean} [immediate=false] - Indicates if hide the viewer immediately or not.
+ * @returns {Viewer} this
+ */
+ hide: function hide() {
+ var _this = this;
+ var immediate = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var element = this.element,
+ options = this.options;
+ if (options.inline || this.hiding || !(this.isShown || this.showing)) {
+ return this;
+ }
+ if (isFunction(options.hide)) {
+ addListener(element, EVENT_HIDE, options.hide, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_HIDE) === false) {
+ return this;
+ }
+ if (this.showing) {
+ this.transitioning.abort();
+ }
+ this.hiding = true;
+ if (this.played) {
+ this.stop();
+ } else if (this.viewing) {
+ this.viewing.abort();
+ }
+ var viewer = this.viewer,
+ image = this.image;
+ var hideImmediately = function hideImmediately() {
+ removeClass(viewer, CLASS_IN);
+ _this.hidden();
+ };
+ if (options.transition && !immediate) {
+ var onViewerTransitionEnd = function onViewerTransitionEnd(event) {
+ // Ignore all propagating `transitionend` events (#275).
+ if (event && event.target === viewer) {
+ removeListener(viewer, EVENT_TRANSITION_END, onViewerTransitionEnd);
+ _this.hidden();
+ }
+ };
+ var onImageTransitionEnd = function onImageTransitionEnd() {
+ // In case of show the viewer by `viewer.show(true)` previously (#407).
+ if (hasClass(viewer, CLASS_TRANSITION)) {
+ addListener(viewer, EVENT_TRANSITION_END, onViewerTransitionEnd);
+ removeClass(viewer, CLASS_IN);
+ } else {
+ hideImmediately();
+ }
+ };
+ this.transitioning = {
+ abort: function abort() {
+ if (_this.viewed && hasClass(image, CLASS_TRANSITION)) {
+ removeListener(image, EVENT_TRANSITION_END, onImageTransitionEnd);
+ } else if (hasClass(viewer, CLASS_TRANSITION)) {
+ removeListener(viewer, EVENT_TRANSITION_END, onViewerTransitionEnd);
+ }
+ }
+ };
+
+ // In case of hiding the viewer when holding on the image (#255),
+ // note that the `CLASS_TRANSITION` class will be removed on pointer down.
+ if (this.viewed && hasClass(image, CLASS_TRANSITION)) {
+ addListener(image, EVENT_TRANSITION_END, onImageTransitionEnd, {
+ once: true
+ });
+ this.zoomTo(0, false, null, null, true);
+ } else {
+ onImageTransitionEnd();
+ }
+ } else {
+ hideImmediately();
+ }
+ return this;
+ },
+ /**
+ * View one of the images with image's index
+ * @param {number} index - The index of the image to view.
+ * @returns {Viewer} this
+ */
+ view: function view() {
+ var _this2 = this;
+ var index = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.options.initialViewIndex;
+ index = Number(index) || 0;
+ if (this.hiding || this.played || index < 0 || index >= this.length || this.viewed && index === this.index) {
+ return this;
+ }
+ if (!this.isShown) {
+ this.index = index;
+ return this.show();
+ }
+ if (this.viewing) {
+ this.viewing.abort();
+ }
+ var element = this.element,
+ options = this.options,
+ title = this.title,
+ canvas = this.canvas;
+ var item = this.items[index];
+ var img = item.querySelector('img');
+ var url = getData(img, 'originalUrl');
+ var alt = img.getAttribute('alt');
+ var image = document.createElement('img');
+ forEach(options.inheritedAttributes, function (name) {
+ var value = img.getAttribute(name);
+ if (value !== null) {
+ image.setAttribute(name, value);
+ }
+ });
+ image.src = url;
+ image.alt = alt;
+ if (isFunction(options.view)) {
+ addListener(element, EVENT_VIEW, options.view, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_VIEW, {
+ originalImage: this.images[index],
+ index: index,
+ image: image
+ }) === false || !this.isShown || this.hiding || this.played) {
+ return this;
+ }
+ var activeItem = this.items[this.index];
+ if (activeItem) {
+ removeClass(activeItem, CLASS_ACTIVE);
+ activeItem.removeAttribute('aria-selected');
+ }
+ addClass(item, CLASS_ACTIVE);
+ item.setAttribute('aria-selected', true);
+ if (options.focus) {
+ item.focus();
+ }
+ this.image = image;
+ this.viewed = false;
+ this.index = index;
+ this.imageData = {};
+ addClass(image, CLASS_INVISIBLE);
+ if (options.loading) {
+ addClass(canvas, CLASS_LOADING);
+ }
+ canvas.innerHTML = '';
+ canvas.appendChild(image);
+
+ // Center current item
+ this.renderList();
+
+ // Clear title
+ title.innerHTML = '';
+
+ // Generate title after viewed
+ var onViewed = function onViewed() {
+ var imageData = _this2.imageData;
+ var render = Array.isArray(options.title) ? options.title[1] : options.title;
+ title.innerHTML = escapeHTMLEntities(isFunction(render) ? render.call(_this2, image, imageData) : "".concat(alt, " (").concat(imageData.naturalWidth, " \xD7 ").concat(imageData.naturalHeight, ")"));
+ };
+ var onLoad;
+ var onError;
+ addListener(element, EVENT_VIEWED, onViewed, {
+ once: true
+ });
+ this.viewing = {
+ abort: function abort() {
+ removeListener(element, EVENT_VIEWED, onViewed);
+ if (image.complete) {
+ if (_this2.imageRendering) {
+ _this2.imageRendering.abort();
+ } else if (_this2.imageInitializing) {
+ _this2.imageInitializing.abort();
+ }
+ } else {
+ // Cancel download to save bandwidth.
+ image.src = '';
+ removeListener(image, EVENT_LOAD, onLoad);
+ if (_this2.timeout) {
+ clearTimeout(_this2.timeout);
+ }
+ }
+ }
+ };
+ if (image.complete) {
+ this.load();
+ } else {
+ addListener(image, EVENT_LOAD, onLoad = function onLoad() {
+ removeListener(image, EVENT_ERROR, onError);
+ _this2.load();
+ }, {
+ once: true
+ });
+ addListener(image, EVENT_ERROR, onError = function onError() {
+ removeListener(image, EVENT_LOAD, onLoad);
+ if (_this2.timeout) {
+ clearTimeout(_this2.timeout);
+ _this2.timeout = false;
+ }
+ removeClass(image, CLASS_INVISIBLE);
+ if (options.loading) {
+ removeClass(_this2.canvas, CLASS_LOADING);
+ }
+ }, {
+ once: true
+ });
+ if (this.timeout) {
+ clearTimeout(this.timeout);
+ }
+
+ // Make the image visible if it fails to load within 1s
+ this.timeout = setTimeout(function () {
+ removeClass(image, CLASS_INVISIBLE);
+ _this2.timeout = false;
+ }, 1000);
+ }
+ return this;
+ },
+ /**
+ * View the previous image
+ * @param {boolean} [loop=false] - Indicate if view the last one
+ * when it is the first one at present.
+ * @returns {Viewer} this
+ */
+ prev: function prev() {
+ var loop = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var index = this.index - 1;
+ if (index < 0) {
+ index = loop ? this.length - 1 : 0;
+ }
+ this.view(index);
+ return this;
+ },
+ /**
+ * View the next image
+ * @param {boolean} [loop=false] - Indicate if view the first one
+ * when it is the last one at present.
+ * @returns {Viewer} this
+ */
+ next: function next() {
+ var loop = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var maxIndex = this.length - 1;
+ var index = this.index + 1;
+ if (index > maxIndex) {
+ index = loop ? 0 : maxIndex;
+ }
+ this.view(index);
+ return this;
+ },
+ /**
+ * Move the image with relative offsets.
+ * @param {number} x - The moving distance in the horizontal direction.
+ * @param {number} [y=x] The moving distance in the vertical direction.
+ * @returns {Viewer} this
+ */
+ move: function move(x) {
+ var y = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : x;
+ var imageData = this.imageData;
+ this.moveTo(isUndefined(x) ? x : imageData.x + Number(x), isUndefined(y) ? y : imageData.y + Number(y));
+ return this;
+ },
+ /**
+ * Move the image to an absolute point.
+ * @param {number} x - The new position in the horizontal direction.
+ * @param {number} [y=x] - The new position in the vertical direction.
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @returns {Viewer} this
+ */
+ moveTo: function moveTo(x) {
+ var _this3 = this;
+ var y = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : x;
+ var _originalEvent = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
+ var element = this.element,
+ options = this.options,
+ imageData = this.imageData;
+ x = Number(x);
+ y = Number(y);
+ if (this.viewed && !this.played && options.movable) {
+ var oldX = imageData.x;
+ var oldY = imageData.y;
+ var changed = false;
+ if (isNumber(x)) {
+ changed = true;
+ } else {
+ x = oldX;
+ }
+ if (isNumber(y)) {
+ changed = true;
+ } else {
+ y = oldY;
+ }
+ if (changed) {
+ if (isFunction(options.move)) {
+ addListener(element, EVENT_MOVE, options.move, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_MOVE, {
+ x: x,
+ y: y,
+ oldX: oldX,
+ oldY: oldY,
+ originalEvent: _originalEvent
+ }) === false) {
+ return this;
+ }
+ imageData.x = x;
+ imageData.y = y;
+ imageData.left = x;
+ imageData.top = y;
+ this.moving = true;
+ this.renderImage(function () {
+ _this3.moving = false;
+ if (isFunction(options.moved)) {
+ addListener(element, EVENT_MOVED, options.moved, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_MOVED, {
+ x: x,
+ y: y,
+ oldX: oldX,
+ oldY: oldY,
+ originalEvent: _originalEvent
+ }, {
+ cancelable: false
+ });
+ });
+ }
+ }
+ return this;
+ },
+ /**
+ * Rotate the image with a relative degree.
+ * @param {number} degree - The rotate degree.
+ * @returns {Viewer} this
+ */
+ rotate: function rotate(degree) {
+ this.rotateTo((this.imageData.rotate || 0) + Number(degree));
+ return this;
+ },
+ /**
+ * Rotate the image to an absolute degree.
+ * @param {number} degree - The rotate degree.
+ * @returns {Viewer} this
+ */
+ rotateTo: function rotateTo(degree) {
+ var _this4 = this;
+ var element = this.element,
+ options = this.options,
+ imageData = this.imageData;
+ degree = Number(degree);
+ if (isNumber(degree) && this.viewed && !this.played && options.rotatable) {
+ var oldDegree = imageData.rotate;
+ if (isFunction(options.rotate)) {
+ addListener(element, EVENT_ROTATE, options.rotate, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_ROTATE, {
+ degree: degree,
+ oldDegree: oldDegree
+ }) === false) {
+ return this;
+ }
+ imageData.rotate = degree;
+ this.rotating = true;
+ this.renderImage(function () {
+ _this4.rotating = false;
+ if (isFunction(options.rotated)) {
+ addListener(element, EVENT_ROTATED, options.rotated, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_ROTATED, {
+ degree: degree,
+ oldDegree: oldDegree
+ }, {
+ cancelable: false
+ });
+ });
+ }
+ return this;
+ },
+ /**
+ * Scale the image on the x-axis.
+ * @param {number} scaleX - The scale ratio on the x-axis.
+ * @returns {Viewer} this
+ */
+ scaleX: function scaleX(_scaleX) {
+ this.scale(_scaleX, this.imageData.scaleY);
+ return this;
+ },
+ /**
+ * Scale the image on the y-axis.
+ * @param {number} scaleY - The scale ratio on the y-axis.
+ * @returns {Viewer} this
+ */
+ scaleY: function scaleY(_scaleY) {
+ this.scale(this.imageData.scaleX, _scaleY);
+ return this;
+ },
+ /**
+ * Scale the image.
+ * @param {number} scaleX - The scale ratio on the x-axis.
+ * @param {number} [scaleY=scaleX] - The scale ratio on the y-axis.
+ * @returns {Viewer} this
+ */
+ scale: function scale(scaleX) {
+ var _this5 = this;
+ var scaleY = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : scaleX;
+ var element = this.element,
+ options = this.options,
+ imageData = this.imageData;
+ scaleX = Number(scaleX);
+ scaleY = Number(scaleY);
+ if (this.viewed && !this.played && options.scalable) {
+ var oldScaleX = imageData.scaleX;
+ var oldScaleY = imageData.scaleY;
+ var changed = false;
+ if (isNumber(scaleX)) {
+ changed = true;
+ } else {
+ scaleX = oldScaleX;
+ }
+ if (isNumber(scaleY)) {
+ changed = true;
+ } else {
+ scaleY = oldScaleY;
+ }
+ if (changed) {
+ if (isFunction(options.scale)) {
+ addListener(element, EVENT_SCALE, options.scale, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_SCALE, {
+ scaleX: scaleX,
+ scaleY: scaleY,
+ oldScaleX: oldScaleX,
+ oldScaleY: oldScaleY
+ }) === false) {
+ return this;
+ }
+ imageData.scaleX = scaleX;
+ imageData.scaleY = scaleY;
+ this.scaling = true;
+ this.renderImage(function () {
+ _this5.scaling = false;
+ if (isFunction(options.scaled)) {
+ addListener(element, EVENT_SCALED, options.scaled, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_SCALED, {
+ scaleX: scaleX,
+ scaleY: scaleY,
+ oldScaleX: oldScaleX,
+ oldScaleY: oldScaleY
+ }, {
+ cancelable: false
+ });
+ });
+ }
+ }
+ return this;
+ },
+ /**
+ * Zoom the image with a relative ratio.
+ * @param {number} ratio - The target ratio.
+ * @param {boolean} [showTooltip=false] - Indicates whether to show the tooltip.
+ * @param {Object} [pivot] - The pivot point coordinate for zooming.
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @returns {Viewer} this
+ */
+ zoom: function zoom(ratio) {
+ var showTooltip = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+ var pivot = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
+ var _originalEvent = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
+ var imageData = this.imageData;
+ ratio = Number(ratio);
+ if (ratio < 0) {
+ ratio = 1 / (1 - ratio);
+ } else {
+ ratio = 1 + ratio;
+ }
+ this.zoomTo(imageData.width * ratio / imageData.naturalWidth, showTooltip, pivot, _originalEvent);
+ return this;
+ },
+ /**
+ * Zoom the image to an absolute ratio.
+ * @param {number} ratio - The target ratio.
+ * @param {boolean} [showTooltip] - Indicates whether to show the tooltip.
+ * @param {Object} [pivot] - The pivot point coordinate for zooming.
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @param {Event} [_zoomable=false] - Indicates if the current zoom is available or not.
+ * @returns {Viewer} this
+ */
+ zoomTo: function zoomTo(ratio) {
+ var _this6 = this;
+ var showTooltip = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+ var pivot = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
+ var _originalEvent = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
+ var _zoomable = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : false;
+ var element = this.element,
+ options = this.options,
+ pointers = this.pointers,
+ imageData = this.imageData;
+ var x = imageData.x,
+ y = imageData.y,
+ width = imageData.width,
+ height = imageData.height,
+ naturalWidth = imageData.naturalWidth,
+ naturalHeight = imageData.naturalHeight;
+ ratio = Math.max(0, ratio);
+ if (isNumber(ratio) && this.viewed && !this.played && (_zoomable || options.zoomable)) {
+ if (!_zoomable) {
+ var minZoomRatio = Math.max(0.01, options.minZoomRatio);
+ var maxZoomRatio = Math.min(100, options.maxZoomRatio);
+ ratio = Math.min(Math.max(ratio, minZoomRatio), maxZoomRatio);
+ }
+ if (_originalEvent) {
+ switch (_originalEvent.type) {
+ case 'wheel':
+ if (options.zoomRatio >= 0.055 && ratio > 0.95 && ratio < 1.05) {
+ ratio = 1;
+ }
+ break;
+ case 'pointermove':
+ case 'touchmove':
+ case 'mousemove':
+ if (ratio > 0.99 && ratio < 1.01) {
+ ratio = 1;
+ }
+ break;
+ }
+ }
+ var newWidth = naturalWidth * ratio;
+ var newHeight = naturalHeight * ratio;
+ var offsetWidth = newWidth - width;
+ var offsetHeight = newHeight - height;
+ var oldRatio = imageData.ratio;
+ if (isFunction(options.zoom)) {
+ addListener(element, EVENT_ZOOM, options.zoom, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_ZOOM, {
+ ratio: ratio,
+ oldRatio: oldRatio,
+ originalEvent: _originalEvent
+ }) === false) {
+ return this;
+ }
+ this.zooming = true;
+ if (_originalEvent) {
+ var offset = getOffset(this.viewer);
+ var center = pointers && Object.keys(pointers).length > 0 ? getPointersCenter(pointers) : {
+ pageX: _originalEvent.pageX,
+ pageY: _originalEvent.pageY
+ };
+
+ // Zoom from the triggering point of the event
+ imageData.x -= offsetWidth * ((center.pageX - offset.left - x) / width);
+ imageData.y -= offsetHeight * ((center.pageY - offset.top - y) / height);
+ } else if (isPlainObject(pivot) && isNumber(pivot.x) && isNumber(pivot.y)) {
+ imageData.x -= offsetWidth * ((pivot.x - x) / width);
+ imageData.y -= offsetHeight * ((pivot.y - y) / height);
+ } else {
+ // Zoom from the center of the image
+ imageData.x -= offsetWidth / 2;
+ imageData.y -= offsetHeight / 2;
+ }
+ imageData.left = imageData.x;
+ imageData.top = imageData.y;
+ imageData.width = newWidth;
+ imageData.height = newHeight;
+ imageData.oldRatio = oldRatio;
+ imageData.ratio = ratio;
+ this.renderImage(function () {
+ _this6.zooming = false;
+ if (isFunction(options.zoomed)) {
+ addListener(element, EVENT_ZOOMED, options.zoomed, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_ZOOMED, {
+ ratio: ratio,
+ oldRatio: oldRatio,
+ originalEvent: _originalEvent
+ }, {
+ cancelable: false
+ });
+ });
+ if (showTooltip) {
+ this.tooltip();
+ }
+ }
+ return this;
+ },
+ /**
+ * Play the images
+ * @param {boolean|FullscreenOptions} [fullscreen=false] - Indicate if request fullscreen or not.
+ * @returns {Viewer} this
+ */
+ play: function play() {
+ var _this7 = this;
+ var fullscreen = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ if (!this.isShown || this.played) {
+ return this;
+ }
+ var element = this.element,
+ options = this.options;
+ if (isFunction(options.play)) {
+ addListener(element, EVENT_PLAY, options.play, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_PLAY) === false) {
+ return this;
+ }
+ var player = this.player;
+ var onLoad = this.loadImage.bind(this);
+ var list = [];
+ var total = 0;
+ var index = 0;
+ this.played = true;
+ this.onLoadWhenPlay = onLoad;
+ if (fullscreen) {
+ this.requestFullscreen(fullscreen);
+ }
+ addClass(player, CLASS_SHOW);
+ forEach(this.items, function (item, i) {
+ var img = item.querySelector('img');
+ var image = document.createElement('img');
+ image.src = getData(img, 'originalUrl');
+ image.alt = img.getAttribute('alt');
+ image.referrerPolicy = img.referrerPolicy;
+ total += 1;
+ addClass(image, CLASS_FADE);
+ toggleClass(image, CLASS_TRANSITION, options.transition);
+ if (hasClass(item, CLASS_ACTIVE)) {
+ addClass(image, CLASS_IN);
+ index = i;
+ }
+ list.push(image);
+ addListener(image, EVENT_LOAD, onLoad, {
+ once: true
+ });
+ player.appendChild(image);
+ });
+ if (isNumber(options.interval) && options.interval > 0) {
+ var prev = function prev() {
+ clearTimeout(_this7.playing.timeout);
+ removeClass(list[index], CLASS_IN);
+ index -= 1;
+ index = index >= 0 ? index : total - 1;
+ addClass(list[index], CLASS_IN);
+ _this7.playing.timeout = setTimeout(prev, options.interval);
+ };
+ var next = function next() {
+ clearTimeout(_this7.playing.timeout);
+ removeClass(list[index], CLASS_IN);
+ index += 1;
+ index = index < total ? index : 0;
+ addClass(list[index], CLASS_IN);
+ _this7.playing.timeout = setTimeout(next, options.interval);
+ };
+ if (total > 1) {
+ this.playing = {
+ prev: prev,
+ next: next,
+ timeout: setTimeout(next, options.interval)
+ };
+ }
+ }
+ return this;
+ },
+ // Stop play
+ stop: function stop() {
+ var _this8 = this;
+ if (!this.played) {
+ return this;
+ }
+ var element = this.element,
+ options = this.options;
+ if (isFunction(options.stop)) {
+ addListener(element, EVENT_STOP, options.stop, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_STOP) === false) {
+ return this;
+ }
+ var player = this.player;
+ clearTimeout(this.playing.timeout);
+ this.playing = false;
+ this.played = false;
+ forEach(player.getElementsByTagName('img'), function (image) {
+ removeListener(image, EVENT_LOAD, _this8.onLoadWhenPlay);
+ });
+ removeClass(player, CLASS_SHOW);
+ player.innerHTML = '';
+ this.exitFullscreen();
+ return this;
+ },
+ // Enter modal mode (only available in inline mode)
+ full: function full() {
+ var _this9 = this;
+ var options = this.options,
+ viewer = this.viewer,
+ image = this.image,
+ list = this.list;
+ if (!this.isShown || this.played || this.fulled || !options.inline) {
+ return this;
+ }
+ this.fulled = true;
+ this.open();
+ addClass(this.button, CLASS_FULLSCREEN_EXIT);
+ if (options.transition) {
+ removeClass(list, CLASS_TRANSITION);
+ if (this.viewed) {
+ removeClass(image, CLASS_TRANSITION);
+ }
+ }
+ addClass(viewer, CLASS_FIXED);
+ viewer.setAttribute('role', 'dialog');
+ viewer.setAttribute('aria-labelledby', this.title.id);
+ viewer.setAttribute('aria-modal', true);
+ viewer.removeAttribute('style');
+ setStyle(viewer, {
+ zIndex: options.zIndex
+ });
+ if (options.focus) {
+ this.enforceFocus();
+ }
+ this.initContainer();
+ this.viewerData = assign({}, this.containerData);
+ this.renderList();
+ if (this.viewed) {
+ this.initImage(function () {
+ _this9.renderImage(function () {
+ if (options.transition) {
+ setTimeout(function () {
+ addClass(image, CLASS_TRANSITION);
+ addClass(list, CLASS_TRANSITION);
+ }, 0);
+ }
+ });
+ });
+ }
+ return this;
+ },
+ // Exit modal mode (only available in inline mode)
+ exit: function exit() {
+ var _this10 = this;
+ var options = this.options,
+ viewer = this.viewer,
+ image = this.image,
+ list = this.list;
+ if (!this.isShown || this.played || !this.fulled || !options.inline) {
+ return this;
+ }
+ this.fulled = false;
+ this.close();
+ removeClass(this.button, CLASS_FULLSCREEN_EXIT);
+ if (options.transition) {
+ removeClass(list, CLASS_TRANSITION);
+ if (this.viewed) {
+ removeClass(image, CLASS_TRANSITION);
+ }
+ }
+ if (options.focus) {
+ this.clearEnforceFocus();
+ }
+ viewer.removeAttribute('role');
+ viewer.removeAttribute('aria-labelledby');
+ viewer.removeAttribute('aria-modal');
+ removeClass(viewer, CLASS_FIXED);
+ setStyle(viewer, {
+ zIndex: options.zIndexInline
+ });
+ this.viewerData = assign({}, this.parentData);
+ this.renderViewer();
+ this.renderList();
+ if (this.viewed) {
+ this.initImage(function () {
+ _this10.renderImage(function () {
+ if (options.transition) {
+ setTimeout(function () {
+ addClass(image, CLASS_TRANSITION);
+ addClass(list, CLASS_TRANSITION);
+ }, 0);
+ }
+ });
+ });
+ }
+ return this;
+ },
+ // Show the current ratio of the image with percentage
+ tooltip: function tooltip() {
+ var _this11 = this;
+ var options = this.options,
+ tooltipBox = this.tooltipBox,
+ imageData = this.imageData;
+ if (!this.viewed || this.played || !options.tooltip) {
+ return this;
+ }
+ tooltipBox.textContent = "".concat(Math.round(imageData.ratio * 100), "%");
+ if (!this.tooltipping) {
+ if (options.transition) {
+ if (this.fading) {
+ dispatchEvent(tooltipBox, EVENT_TRANSITION_END);
+ }
+ addClass(tooltipBox, CLASS_SHOW);
+ addClass(tooltipBox, CLASS_FADE);
+ addClass(tooltipBox, CLASS_TRANSITION);
+ tooltipBox.removeAttribute('aria-hidden');
+
+ // Force reflow to enable CSS3 transition
+ tooltipBox.initialOffsetWidth = tooltipBox.offsetWidth;
+ addClass(tooltipBox, CLASS_IN);
+ } else {
+ addClass(tooltipBox, CLASS_SHOW);
+ tooltipBox.removeAttribute('aria-hidden');
+ }
+ } else {
+ clearTimeout(this.tooltipping);
+ }
+ this.tooltipping = setTimeout(function () {
+ if (options.transition) {
+ addListener(tooltipBox, EVENT_TRANSITION_END, function () {
+ removeClass(tooltipBox, CLASS_SHOW);
+ removeClass(tooltipBox, CLASS_FADE);
+ removeClass(tooltipBox, CLASS_TRANSITION);
+ tooltipBox.setAttribute('aria-hidden', true);
+ _this11.fading = false;
+ }, {
+ once: true
+ });
+ removeClass(tooltipBox, CLASS_IN);
+ _this11.fading = true;
+ } else {
+ removeClass(tooltipBox, CLASS_SHOW);
+ tooltipBox.setAttribute('aria-hidden', true);
+ }
+ _this11.tooltipping = false;
+ }, 1000);
+ return this;
+ },
+ /**
+ * Toggle the image size between its current size and natural size
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @returns {Viewer} this
+ */
+ toggle: function toggle() {
+ var _originalEvent = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
+ if (this.imageData.ratio === 1) {
+ this.zoomTo(this.imageData.oldRatio, true, null, _originalEvent);
+ } else {
+ this.zoomTo(1, true, null, _originalEvent);
+ }
+ return this;
+ },
+ // Reset the image to its initial state
+ reset: function reset() {
+ if (this.viewed && !this.played) {
+ this.imageData = assign({}, this.initialImageData);
+ this.renderImage();
+ }
+ return this;
+ },
+ // Update viewer when images changed
+ update: function update() {
+ var _this12 = this;
+ var element = this.element,
+ options = this.options,
+ isImg = this.isImg;
+
+ // Destroy viewer if the target image was deleted
+ if (isImg && !element.parentNode) {
+ return this.destroy();
+ }
+ var images = [];
+ forEach(isImg ? [element] : element.querySelectorAll('img'), function (image) {
+ if (isFunction(options.filter)) {
+ if (options.filter.call(_this12, image)) {
+ images.push(image);
+ }
+ } else if (_this12.getImageURL(image)) {
+ images.push(image);
+ }
+ });
+ if (!images.length) {
+ return this;
+ }
+ this.images = images;
+ this.length = images.length;
+ if (this.ready) {
+ var changedIndexes = [];
+ forEach(this.items, function (item, i) {
+ var img = item.querySelector('img');
+ var image = images[i];
+ if (image && img) {
+ if (image.src !== img.src
+
+ // Title changed (#408)
+ || image.alt !== img.alt) {
+ changedIndexes.push(i);
+ }
+ } else {
+ changedIndexes.push(i);
+ }
+ });
+ setStyle(this.list, {
+ width: 'auto'
+ });
+ this.initList();
+ if (this.isShown) {
+ if (this.length) {
+ if (this.viewed) {
+ var changedIndex = changedIndexes.indexOf(this.index);
+ if (changedIndex >= 0) {
+ this.viewed = false;
+ this.view(Math.max(Math.min(this.index - changedIndex, this.length - 1), 0));
+ } else {
+ var activeItem = this.items[this.index];
+
+ // Reactivate the current viewing item after reset the list.
+ addClass(activeItem, CLASS_ACTIVE);
+ activeItem.setAttribute('aria-selected', true);
+ }
+ }
+ } else {
+ this.image = null;
+ this.viewed = false;
+ this.index = 0;
+ this.imageData = {};
+ this.canvas.innerHTML = '';
+ this.title.innerHTML = '';
+ }
+ }
+ } else {
+ this.build();
+ }
+ return this;
+ },
+ // Destroy the viewer
+ destroy: function destroy() {
+ var element = this.element,
+ options = this.options;
+ if (!element[NAMESPACE]) {
+ return this;
+ }
+ this.destroyed = true;
+ if (this.ready) {
+ if (this.played) {
+ this.stop();
+ }
+ if (options.inline) {
+ if (this.fulled) {
+ this.exit();
+ }
+ this.unbind();
+ } else if (this.isShown) {
+ if (this.viewing) {
+ if (this.imageRendering) {
+ this.imageRendering.abort();
+ } else if (this.imageInitializing) {
+ this.imageInitializing.abort();
+ }
+ }
+ if (this.hiding) {
+ this.transitioning.abort();
+ }
+ this.hidden();
+ } else if (this.showing) {
+ this.transitioning.abort();
+ this.hidden();
+ }
+ this.ready = false;
+ this.viewer.parentNode.removeChild(this.viewer);
+ } else if (options.inline) {
+ if (this.delaying) {
+ this.delaying.abort();
+ } else if (this.initializing) {
+ this.initializing.abort();
+ }
+ }
+ if (!options.inline) {
+ removeListener(element, EVENT_CLICK, this.onStart);
+ }
+ element[NAMESPACE] = undefined;
+ return this;
+ }
+};
+
+var others = {
+ getImageURL: function getImageURL(image) {
+ var url = this.options.url;
+ if (isString(url)) {
+ url = image.getAttribute(url);
+ } else if (isFunction(url)) {
+ url = url.call(this, image);
+ } else {
+ url = '';
+ }
+ return url;
+ },
+ enforceFocus: function enforceFocus() {
+ var _this = this;
+ this.clearEnforceFocus();
+ addListener(document, EVENT_FOCUSIN, this.onFocusin = function (event) {
+ var viewer = _this.viewer;
+ var target = event.target;
+ if (target === document || target === viewer || viewer.contains(target)) {
+ return;
+ }
+ while (target) {
+ // Avoid conflicts with other modals (#474, #540)
+ if (target.getAttribute('tabindex') !== null || target.getAttribute('aria-modal') === 'true') {
+ return;
+ }
+ target = target.parentElement;
+ }
+ viewer.focus();
+ });
+ },
+ clearEnforceFocus: function clearEnforceFocus() {
+ if (this.onFocusin) {
+ removeListener(document, EVENT_FOCUSIN, this.onFocusin);
+ this.onFocusin = null;
+ }
+ },
+ open: function open() {
+ var body = this.body;
+ addClass(body, CLASS_OPEN);
+ if (this.scrollbarWidth > 0) {
+ body.style.paddingRight = "".concat(this.scrollbarWidth + (parseFloat(this.initialBodyComputedPaddingRight) || 0), "px");
+ }
+ },
+ close: function close() {
+ var body = this.body;
+ removeClass(body, CLASS_OPEN);
+ if (this.scrollbarWidth > 0) {
+ body.style.paddingRight = this.initialBodyPaddingRight;
+ }
+ },
+ shown: function shown() {
+ var element = this.element,
+ options = this.options,
+ viewer = this.viewer;
+ this.fulled = true;
+ this.isShown = true;
+ this.render();
+ this.bind();
+ this.showing = false;
+ if (options.focus) {
+ viewer.focus();
+ this.enforceFocus();
+ }
+ if (isFunction(options.shown)) {
+ addListener(element, EVENT_SHOWN, options.shown, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_SHOWN) === false) {
+ return;
+ }
+ if (this.ready && this.isShown && !this.hiding) {
+ this.view(this.index);
+ }
+ },
+ hidden: function hidden() {
+ var element = this.element,
+ options = this.options,
+ viewer = this.viewer;
+ if (options.fucus) {
+ this.clearEnforceFocus();
+ }
+ this.fulled = false;
+ this.viewed = false;
+ this.isShown = false;
+ this.close();
+ this.unbind();
+ addClass(viewer, CLASS_HIDE);
+ viewer.removeAttribute('role');
+ viewer.removeAttribute('aria-labelledby');
+ viewer.removeAttribute('aria-modal');
+ viewer.setAttribute('aria-hidden', true);
+ this.resetList();
+ this.resetImage();
+ this.hiding = false;
+ if (!this.destroyed) {
+ if (isFunction(options.hidden)) {
+ addListener(element, EVENT_HIDDEN, options.hidden, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_HIDDEN, null, {
+ cancelable: false
+ });
+ }
+ },
+ requestFullscreen: function requestFullscreen(options) {
+ var document = this.element.ownerDocument;
+ if (this.fulled && !(document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement)) {
+ var documentElement = document.documentElement;
+
+ // Element.requestFullscreen()
+ if (documentElement.requestFullscreen) {
+ // Avoid TypeError when convert `options` to dictionary
+ if (isPlainObject(options)) {
+ documentElement.requestFullscreen(options);
+ } else {
+ documentElement.requestFullscreen();
+ }
+ } else if (documentElement.webkitRequestFullscreen) {
+ documentElement.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
+ } else if (documentElement.mozRequestFullScreen) {
+ documentElement.mozRequestFullScreen();
+ } else if (documentElement.msRequestFullscreen) {
+ documentElement.msRequestFullscreen();
+ }
+ }
+ },
+ exitFullscreen: function exitFullscreen() {
+ var document = this.element.ownerDocument;
+ if (this.fulled && (document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement)) {
+ // Document.exitFullscreen()
+ if (document.exitFullscreen) {
+ document.exitFullscreen();
+ } else if (document.webkitExitFullscreen) {
+ document.webkitExitFullscreen();
+ } else if (document.mozCancelFullScreen) {
+ document.mozCancelFullScreen();
+ } else if (document.msExitFullscreen) {
+ document.msExitFullscreen();
+ }
+ }
+ },
+ change: function change(event) {
+ var options = this.options,
+ pointers = this.pointers;
+ var pointer = pointers[Object.keys(pointers)[0]];
+
+ // In the case of the `pointers` object is empty (#421)
+ if (!pointer) {
+ return;
+ }
+ var offsetX = pointer.endX - pointer.startX;
+ var offsetY = pointer.endY - pointer.startY;
+ switch (this.action) {
+ // Move the current image
+ case ACTION_MOVE:
+ this.move(offsetX, offsetY, event);
+ break;
+
+ // Zoom the current image
+ case ACTION_ZOOM:
+ this.zoom(getMaxZoomRatio(pointers), false, null, event);
+ break;
+ case ACTION_SWITCH:
+ {
+ this.action = 'switched';
+ var absoluteOffsetX = Math.abs(offsetX);
+ if (absoluteOffsetX > 1 && absoluteOffsetX > Math.abs(offsetY)) {
+ // Empty `pointers` as `touchend` event will not be fired after swiped in iOS browsers.
+ this.pointers = {};
+ if (offsetX > 1) {
+ this.prev(options.loop);
+ } else if (offsetX < -1) {
+ this.next(options.loop);
+ }
+ }
+ break;
+ }
+ }
+
+ // Override
+ forEach(pointers, function (p) {
+ p.startX = p.endX;
+ p.startY = p.endY;
+ });
+ },
+ isSwitchable: function isSwitchable() {
+ var imageData = this.imageData,
+ viewerData = this.viewerData;
+ return this.length > 1 && imageData.x >= 0 && imageData.y >= 0 && imageData.width <= viewerData.width && imageData.height <= viewerData.height;
+ }
+};
+
+var AnotherViewer = WINDOW.Viewer;
+var getUniqueID = function (id) {
+ return function () {
+ id += 1;
+ return id;
+ };
+}(-1);
+var Viewer = /*#__PURE__*/function () {
+ /**
+ * Create a new Viewer.
+ * @param {Element} element - The target element for viewing.
+ * @param {Object} [options={}] - The configuration options.
+ */
+ function Viewer(element) {
+ var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+ _classCallCheck(this, Viewer);
+ if (!element || element.nodeType !== 1) {
+ throw new Error('The first argument is required and must be an element.');
+ }
+ this.element = element;
+ this.options = assign({}, DEFAULTS, isPlainObject(options) && options);
+ this.action = false;
+ this.fading = false;
+ this.fulled = false;
+ this.hiding = false;
+ this.imageClicked = false;
+ this.imageData = {};
+ this.index = this.options.initialViewIndex;
+ this.isImg = false;
+ this.isShown = false;
+ this.length = 0;
+ this.moving = false;
+ this.played = false;
+ this.playing = false;
+ this.pointers = {};
+ this.ready = false;
+ this.rotating = false;
+ this.scaling = false;
+ this.showing = false;
+ this.timeout = false;
+ this.tooltipping = false;
+ this.viewed = false;
+ this.viewing = false;
+ this.wheeling = false;
+ this.zooming = false;
+ this.pointerMoved = false;
+ this.id = getUniqueID();
+ this.init();
+ }
+ _createClass(Viewer, [{
+ key: "init",
+ value: function init() {
+ var _this = this;
+ var element = this.element,
+ options = this.options;
+ if (element[NAMESPACE]) {
+ return;
+ }
+ element[NAMESPACE] = this;
+
+ // The `focus` option requires the `keyboard` option set to `true`.
+ if (options.focus && !options.keyboard) {
+ options.focus = false;
+ }
+ var isImg = element.localName === 'img';
+ var images = [];
+ forEach(isImg ? [element] : element.querySelectorAll('img'), function (image) {
+ if (isFunction(options.filter)) {
+ if (options.filter.call(_this, image)) {
+ images.push(image);
+ }
+ } else if (_this.getImageURL(image)) {
+ images.push(image);
+ }
+ });
+ this.isImg = isImg;
+ this.length = images.length;
+ this.images = images;
+ this.initBody();
+
+ // Override `transition` option if it is not supported
+ if (isUndefined(document.createElement(NAMESPACE).style.transition)) {
+ options.transition = false;
+ }
+ if (options.inline) {
+ var count = 0;
+ var progress = function progress() {
+ count += 1;
+ if (count === _this.length) {
+ var timeout;
+ _this.initializing = false;
+ _this.delaying = {
+ abort: function abort() {
+ clearTimeout(timeout);
+ }
+ };
+
+ // build asynchronously to keep `this.viewer` is accessible in `ready` event handler.
+ timeout = setTimeout(function () {
+ _this.delaying = false;
+ _this.build();
+ }, 0);
+ }
+ };
+ this.initializing = {
+ abort: function abort() {
+ forEach(images, function (image) {
+ if (!image.complete) {
+ removeListener(image, EVENT_LOAD, progress);
+ removeListener(image, EVENT_ERROR, progress);
+ }
+ });
+ }
+ };
+ forEach(images, function (image) {
+ if (image.complete) {
+ progress();
+ } else {
+ var onLoad;
+ var onError;
+ addListener(image, EVENT_LOAD, onLoad = function onLoad() {
+ removeListener(image, EVENT_ERROR, onError);
+ progress();
+ }, {
+ once: true
+ });
+ addListener(image, EVENT_ERROR, onError = function onError() {
+ removeListener(image, EVENT_LOAD, onLoad);
+ progress();
+ }, {
+ once: true
+ });
+ }
+ });
+ } else {
+ addListener(element, EVENT_CLICK, this.onStart = function (_ref) {
+ var target = _ref.target;
+ if (target.localName === 'img' && (!isFunction(options.filter) || options.filter.call(_this, target))) {
+ _this.view(_this.images.indexOf(target));
+ }
+ });
+ }
+ }
+ }, {
+ key: "build",
+ value: function build() {
+ if (this.ready) {
+ return;
+ }
+ var element = this.element,
+ options = this.options;
+ var parent = element.parentNode;
+ var template = document.createElement('div');
+ template.innerHTML = TEMPLATE;
+ var viewer = template.querySelector(".".concat(NAMESPACE, "-container"));
+ var title = viewer.querySelector(".".concat(NAMESPACE, "-title"));
+ var toolbar = viewer.querySelector(".".concat(NAMESPACE, "-toolbar"));
+ var navbar = viewer.querySelector(".".concat(NAMESPACE, "-navbar"));
+ var button = viewer.querySelector(".".concat(NAMESPACE, "-button"));
+ var canvas = viewer.querySelector(".".concat(NAMESPACE, "-canvas"));
+ this.parent = parent;
+ this.viewer = viewer;
+ this.title = title;
+ this.toolbar = toolbar;
+ this.navbar = navbar;
+ this.button = button;
+ this.canvas = canvas;
+ this.footer = viewer.querySelector(".".concat(NAMESPACE, "-footer"));
+ this.tooltipBox = viewer.querySelector(".".concat(NAMESPACE, "-tooltip"));
+ this.player = viewer.querySelector(".".concat(NAMESPACE, "-player"));
+ this.list = viewer.querySelector(".".concat(NAMESPACE, "-list"));
+ viewer.id = "".concat(NAMESPACE).concat(this.id);
+ title.id = "".concat(NAMESPACE, "Title").concat(this.id);
+ addClass(title, !options.title ? CLASS_HIDE : getResponsiveClass(Array.isArray(options.title) ? options.title[0] : options.title));
+ addClass(navbar, !options.navbar ? CLASS_HIDE : getResponsiveClass(options.navbar));
+ toggleClass(button, CLASS_HIDE, !options.button);
+ if (options.keyboard) {
+ button.setAttribute('tabindex', 0);
+ }
+ if (options.backdrop) {
+ addClass(viewer, "".concat(NAMESPACE, "-backdrop"));
+ if (!options.inline && options.backdrop !== 'static') {
+ setData(canvas, DATA_ACTION, 'hide');
+ }
+ }
+ if (isString(options.className) && options.className) {
+ // In case there are multiple class names
+ options.className.split(REGEXP_SPACES).forEach(function (className) {
+ addClass(viewer, className);
+ });
+ }
+ if (options.toolbar) {
+ var list = document.createElement('ul');
+ var custom = isPlainObject(options.toolbar);
+ var zoomButtons = BUTTONS.slice(0, 3);
+ var rotateButtons = BUTTONS.slice(7, 9);
+ var scaleButtons = BUTTONS.slice(9);
+ if (!custom) {
+ addClass(toolbar, getResponsiveClass(options.toolbar));
+ }
+ forEach(custom ? options.toolbar : BUTTONS, function (value, index) {
+ var deep = custom && isPlainObject(value);
+ var name = custom ? hyphenate(index) : value;
+ var show = deep && !isUndefined(value.show) ? value.show : value;
+ if (!show || !options.zoomable && zoomButtons.indexOf(name) !== -1 || !options.rotatable && rotateButtons.indexOf(name) !== -1 || !options.scalable && scaleButtons.indexOf(name) !== -1) {
+ return;
+ }
+ var size = deep && !isUndefined(value.size) ? value.size : value;
+ var click = deep && !isUndefined(value.click) ? value.click : value;
+ var item = document.createElement('li');
+ if (options.keyboard) {
+ item.setAttribute('tabindex', 0);
+ }
+ item.setAttribute('role', 'button');
+ addClass(item, "".concat(NAMESPACE, "-").concat(name));
+ if (!isFunction(click)) {
+ setData(item, DATA_ACTION, name);
+ }
+ if (isNumber(show)) {
+ addClass(item, getResponsiveClass(show));
+ }
+ if (['small', 'large'].indexOf(size) !== -1) {
+ addClass(item, "".concat(NAMESPACE, "-").concat(size));
+ } else if (name === 'play') {
+ addClass(item, "".concat(NAMESPACE, "-large"));
+ }
+ if (isFunction(click)) {
+ addListener(item, EVENT_CLICK, click);
+ }
+ list.appendChild(item);
+ });
+ toolbar.appendChild(list);
+ } else {
+ addClass(toolbar, CLASS_HIDE);
+ }
+ if (!options.rotatable) {
+ var rotates = toolbar.querySelectorAll('li[class*="rotate"]');
+ addClass(rotates, CLASS_INVISIBLE);
+ forEach(rotates, function (rotate) {
+ toolbar.appendChild(rotate);
+ });
+ }
+ if (options.inline) {
+ addClass(button, CLASS_FULLSCREEN);
+ setStyle(viewer, {
+ zIndex: options.zIndexInline
+ });
+ if (window.getComputedStyle(parent).position === 'static') {
+ setStyle(parent, {
+ position: 'relative'
+ });
+ }
+ parent.insertBefore(viewer, element.nextSibling);
+ } else {
+ addClass(button, CLASS_CLOSE);
+ addClass(viewer, CLASS_FIXED);
+ addClass(viewer, CLASS_FADE);
+ addClass(viewer, CLASS_HIDE);
+ setStyle(viewer, {
+ zIndex: options.zIndex
+ });
+ var container = options.container;
+ if (isString(container)) {
+ container = element.ownerDocument.querySelector(container);
+ }
+ if (!container) {
+ container = this.body;
+ }
+ container.appendChild(viewer);
+ }
+ if (options.inline) {
+ this.render();
+ this.bind();
+ this.isShown = true;
+ }
+ this.ready = true;
+ if (isFunction(options.ready)) {
+ addListener(element, EVENT_READY, options.ready, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_READY) === false) {
+ this.ready = false;
+ return;
+ }
+ if (this.ready && options.inline) {
+ this.view(this.index);
+ }
+ }
+
+ /**
+ * Get the no conflict viewer class.
+ * @returns {Viewer} The viewer class.
+ */
+ }], [{
+ key: "noConflict",
+ value: function noConflict() {
+ window.Viewer = AnotherViewer;
+ return Viewer;
+ }
+
+ /**
+ * Change the default options.
+ * @param {Object} options - The new default options.
+ */
+ }, {
+ key: "setDefaults",
+ value: function setDefaults(options) {
+ assign(DEFAULTS, isPlainObject(options) && options);
+ }
+ }]);
+ return Viewer;
+}();
+assign(Viewer.prototype, render, events, handlers, methods, others);
+
+export { Viewer as default };
diff --git a/static/viewerjs/dist/viewer.js b/static/viewerjs/dist/viewer.js
new file mode 100644
index 0000000..e1381dc
--- /dev/null
+++ b/static/viewerjs/dist/viewer.js
@@ -0,0 +1,3241 @@
+/*!
+ * Viewer.js v1.11.2
+ * https://fengyuanchen.github.io/viewerjs
+ *
+ * Copyright 2015-present Chen Fengyuan
+ * Released under the MIT license
+ *
+ * Date: 2023-01-01T10:14:49.638Z
+ */
+
+(function (global, factory) {
+ typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+ typeof define === 'function' && define.amd ? define(factory) :
+ (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Viewer = factory());
+})(this, (function () { 'use strict';
+
+ function ownKeys(object, enumerableOnly) {
+ var keys = Object.keys(object);
+ if (Object.getOwnPropertySymbols) {
+ var symbols = Object.getOwnPropertySymbols(object);
+ enumerableOnly && (symbols = symbols.filter(function (sym) {
+ return Object.getOwnPropertyDescriptor(object, sym).enumerable;
+ })), keys.push.apply(keys, symbols);
+ }
+ return keys;
+ }
+ function _objectSpread2(target) {
+ for (var i = 1; i < arguments.length; i++) {
+ var source = null != arguments[i] ? arguments[i] : {};
+ i % 2 ? ownKeys(Object(source), !0).forEach(function (key) {
+ _defineProperty(target, key, source[key]);
+ }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) {
+ Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
+ });
+ }
+ return target;
+ }
+ function _typeof(obj) {
+ "@babel/helpers - typeof";
+
+ return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
+ return typeof obj;
+ } : function (obj) {
+ return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+ }, _typeof(obj);
+ }
+ function _classCallCheck(instance, Constructor) {
+ if (!(instance instanceof Constructor)) {
+ throw new TypeError("Cannot call a class as a function");
+ }
+ }
+ function _defineProperties(target, props) {
+ for (var i = 0; i < props.length; i++) {
+ var descriptor = props[i];
+ descriptor.enumerable = descriptor.enumerable || false;
+ descriptor.configurable = true;
+ if ("value" in descriptor) descriptor.writable = true;
+ Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor);
+ }
+ }
+ function _createClass(Constructor, protoProps, staticProps) {
+ if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+ if (staticProps) _defineProperties(Constructor, staticProps);
+ Object.defineProperty(Constructor, "prototype", {
+ writable: false
+ });
+ return Constructor;
+ }
+ function _defineProperty(obj, key, value) {
+ key = _toPropertyKey(key);
+ if (key in obj) {
+ Object.defineProperty(obj, key, {
+ value: value,
+ enumerable: true,
+ configurable: true,
+ writable: true
+ });
+ } else {
+ obj[key] = value;
+ }
+ return obj;
+ }
+ function _toPrimitive(input, hint) {
+ if (typeof input !== "object" || input === null) return input;
+ var prim = input[Symbol.toPrimitive];
+ if (prim !== undefined) {
+ var res = prim.call(input, hint || "default");
+ if (typeof res !== "object") return res;
+ throw new TypeError("@@toPrimitive must return a primitive value.");
+ }
+ return (hint === "string" ? String : Number)(input);
+ }
+ function _toPropertyKey(arg) {
+ var key = _toPrimitive(arg, "string");
+ return typeof key === "symbol" ? key : String(key);
+ }
+
+ var DEFAULTS = {
+ /**
+ * Enable a modal backdrop, specify `static` for a backdrop
+ * which doesn't close the modal on click.
+ * @type {boolean}
+ */
+ backdrop: true,
+ /**
+ * Show the button on the top-right of the viewer.
+ * @type {boolean}
+ */
+ button: true,
+ /**
+ * Show the navbar.
+ * @type {boolean | number}
+ */
+ navbar: true,
+ /**
+ * Specify the visibility and the content of the title.
+ * @type {boolean | number | Function | Array}
+ */
+ title: true,
+ /**
+ * Show the toolbar.
+ * @type {boolean | number | Object}
+ */
+ toolbar: true,
+ /**
+ * Custom class name(s) to add to the viewer's root element.
+ * @type {string}
+ */
+ className: '',
+ /**
+ * Define where to put the viewer in modal mode.
+ * @type {string | Element}
+ */
+ container: 'body',
+ /**
+ * Filter the images for viewing. Return true if the image is viewable.
+ * @type {Function}
+ */
+ filter: null,
+ /**
+ * Enable to request fullscreen when play.
+ * {@link https://developer.mozilla.org/en-US/docs/Web/API/FullscreenOptions}
+ * @type {boolean|FullscreenOptions}
+ */
+ fullscreen: true,
+ /**
+ * Define the extra attributes to inherit from the original image.
+ * @type {Array}
+ */
+ inheritedAttributes: ['crossOrigin', 'decoding', 'isMap', 'loading', 'referrerPolicy', 'sizes', 'srcset', 'useMap'],
+ /**
+ * Define the initial coverage of the viewing image.
+ * @type {number}
+ */
+ initialCoverage: 0.9,
+ /**
+ * Define the initial index of the image for viewing.
+ * @type {number}
+ */
+ initialViewIndex: 0,
+ /**
+ * Enable inline mode.
+ * @type {boolean}
+ */
+ inline: false,
+ /**
+ * The amount of time to delay between automatically cycling an image when playing.
+ * @type {number}
+ */
+ interval: 5000,
+ /**
+ * Enable keyboard support.
+ * @type {boolean}
+ */
+ keyboard: true,
+ /**
+ * Focus the viewer when initialized.
+ * @type {boolean}
+ */
+ focus: true,
+ /**
+ * Indicate if show a loading spinner when load image or not.
+ * @type {boolean}
+ */
+ loading: true,
+ /**
+ * Indicate if enable loop viewing or not.
+ * @type {boolean}
+ */
+ loop: true,
+ /**
+ * Min width of the viewer in inline mode.
+ * @type {number}
+ */
+ minWidth: 200,
+ /**
+ * Min height of the viewer in inline mode.
+ * @type {number}
+ */
+ minHeight: 100,
+ /**
+ * Enable to move the image.
+ * @type {boolean}
+ */
+ movable: true,
+ /**
+ * Enable to rotate the image.
+ * @type {boolean}
+ */
+ rotatable: true,
+ /**
+ * Enable to scale the image.
+ * @type {boolean}
+ */
+ scalable: true,
+ /**
+ * Enable to zoom the image.
+ * @type {boolean}
+ */
+ zoomable: true,
+ /**
+ * Enable to zoom the current image by dragging on the touch screen.
+ * @type {boolean}
+ */
+ zoomOnTouch: true,
+ /**
+ * Enable to zoom the image by wheeling mouse.
+ * @type {boolean}
+ */
+ zoomOnWheel: true,
+ /**
+ * Enable to slide to the next or previous image by swiping on the touch screen.
+ * @type {boolean}
+ */
+ slideOnTouch: true,
+ /**
+ * Indicate if toggle the image size between its natural size
+ * and initial size when double click on the image or not.
+ * @type {boolean}
+ */
+ toggleOnDblclick: true,
+ /**
+ * Show the tooltip with image ratio (percentage) when zoom in or zoom out.
+ * @type {boolean}
+ */
+ tooltip: true,
+ /**
+ * Enable CSS3 Transition for some special elements.
+ * @type {boolean}
+ */
+ transition: true,
+ /**
+ * Define the CSS `z-index` value of viewer in modal mode.
+ * @type {number}
+ */
+ zIndex: 2015,
+ /**
+ * Define the CSS `z-index` value of viewer in inline mode.
+ * @type {number}
+ */
+ zIndexInline: 0,
+ /**
+ * Define the ratio when zoom the image by wheeling mouse.
+ * @type {number}
+ */
+ zoomRatio: 0.1,
+ /**
+ * Define the min ratio of the image when zoom out.
+ * @type {number}
+ */
+ minZoomRatio: 0.01,
+ /**
+ * Define the max ratio of the image when zoom in.
+ * @type {number}
+ */
+ maxZoomRatio: 100,
+ /**
+ * Define where to get the original image URL for viewing.
+ * @type {string | Function}
+ */
+ url: 'src',
+ /**
+ * Event shortcuts.
+ * @type {Function}
+ */
+ ready: null,
+ show: null,
+ shown: null,
+ hide: null,
+ hidden: null,
+ view: null,
+ viewed: null,
+ move: null,
+ moved: null,
+ rotate: null,
+ rotated: null,
+ scale: null,
+ scaled: null,
+ zoom: null,
+ zoomed: null,
+ play: null,
+ stop: null
+ };
+
+ var TEMPLATE = '<div class="viewer-container" tabindex="-1" touch-action="none">' + '<div class="viewer-canvas"></div>' + '<div class="viewer-footer">' + '<div class="viewer-title"></div>' + '<div class="viewer-toolbar"></div>' + '<div class="viewer-navbar">' + '<ul class="viewer-list" role="navigation"></ul>' + '</div>' + '</div>' + '<div class="viewer-tooltip" role="alert" aria-hidden="true"></div>' + '<div class="viewer-button" data-viewer-action="mix" role="button"></div>' + '<div class="viewer-player"></div>' + '</div>';
+
+ var IS_BROWSER = typeof window !== 'undefined' && typeof window.document !== 'undefined';
+ var WINDOW = IS_BROWSER ? window : {};
+ var IS_TOUCH_DEVICE = IS_BROWSER && WINDOW.document.documentElement ? 'ontouchstart' in WINDOW.document.documentElement : false;
+ var HAS_POINTER_EVENT = IS_BROWSER ? 'PointerEvent' in WINDOW : false;
+ var NAMESPACE = 'viewer';
+
+ // Actions
+ var ACTION_MOVE = 'move';
+ var ACTION_SWITCH = 'switch';
+ var ACTION_ZOOM = 'zoom';
+
+ // Classes
+ var CLASS_ACTIVE = "".concat(NAMESPACE, "-active");
+ var CLASS_CLOSE = "".concat(NAMESPACE, "-close");
+ var CLASS_FADE = "".concat(NAMESPACE, "-fade");
+ var CLASS_FIXED = "".concat(NAMESPACE, "-fixed");
+ var CLASS_FULLSCREEN = "".concat(NAMESPACE, "-fullscreen");
+ var CLASS_FULLSCREEN_EXIT = "".concat(NAMESPACE, "-fullscreen-exit");
+ var CLASS_HIDE = "".concat(NAMESPACE, "-hide");
+ var CLASS_HIDE_MD_DOWN = "".concat(NAMESPACE, "-hide-md-down");
+ var CLASS_HIDE_SM_DOWN = "".concat(NAMESPACE, "-hide-sm-down");
+ var CLASS_HIDE_XS_DOWN = "".concat(NAMESPACE, "-hide-xs-down");
+ var CLASS_IN = "".concat(NAMESPACE, "-in");
+ var CLASS_INVISIBLE = "".concat(NAMESPACE, "-invisible");
+ var CLASS_LOADING = "".concat(NAMESPACE, "-loading");
+ var CLASS_MOVE = "".concat(NAMESPACE, "-move");
+ var CLASS_OPEN = "".concat(NAMESPACE, "-open");
+ var CLASS_SHOW = "".concat(NAMESPACE, "-show");
+ var CLASS_TRANSITION = "".concat(NAMESPACE, "-transition");
+
+ // Native events
+ var EVENT_CLICK = 'click';
+ var EVENT_DBLCLICK = 'dblclick';
+ var EVENT_DRAG_START = 'dragstart';
+ var EVENT_FOCUSIN = 'focusin';
+ var EVENT_KEY_DOWN = 'keydown';
+ var EVENT_LOAD = 'load';
+ var EVENT_ERROR = 'error';
+ var EVENT_TOUCH_END = IS_TOUCH_DEVICE ? 'touchend touchcancel' : 'mouseup';
+ var EVENT_TOUCH_MOVE = IS_TOUCH_DEVICE ? 'touchmove' : 'mousemove';
+ var EVENT_TOUCH_START = IS_TOUCH_DEVICE ? 'touchstart' : 'mousedown';
+ var EVENT_POINTER_DOWN = HAS_POINTER_EVENT ? 'pointerdown' : EVENT_TOUCH_START;
+ var EVENT_POINTER_MOVE = HAS_POINTER_EVENT ? 'pointermove' : EVENT_TOUCH_MOVE;
+ var EVENT_POINTER_UP = HAS_POINTER_EVENT ? 'pointerup pointercancel' : EVENT_TOUCH_END;
+ var EVENT_RESIZE = 'resize';
+ var EVENT_TRANSITION_END = 'transitionend';
+ var EVENT_WHEEL = 'wheel';
+
+ // Custom events
+ var EVENT_READY = 'ready';
+ var EVENT_SHOW = 'show';
+ var EVENT_SHOWN = 'shown';
+ var EVENT_HIDE = 'hide';
+ var EVENT_HIDDEN = 'hidden';
+ var EVENT_VIEW = 'view';
+ var EVENT_VIEWED = 'viewed';
+ var EVENT_MOVE = 'move';
+ var EVENT_MOVED = 'moved';
+ var EVENT_ROTATE = 'rotate';
+ var EVENT_ROTATED = 'rotated';
+ var EVENT_SCALE = 'scale';
+ var EVENT_SCALED = 'scaled';
+ var EVENT_ZOOM = 'zoom';
+ var EVENT_ZOOMED = 'zoomed';
+ var EVENT_PLAY = 'play';
+ var EVENT_STOP = 'stop';
+
+ // Data keys
+ var DATA_ACTION = "".concat(NAMESPACE, "Action");
+
+ // RegExps
+ var REGEXP_SPACES = /\s\s*/;
+
+ // Misc
+ var BUTTONS = ['zoom-in', 'zoom-out', 'one-to-one', 'reset', 'prev', 'play', 'next', 'rotate-left', 'rotate-right', 'flip-horizontal', 'flip-vertical'];
+
+ /**
+ * Check if the given value is a string.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a string, else `false`.
+ */
+ function isString(value) {
+ return typeof value === 'string';
+ }
+
+ /**
+ * Check if the given value is not a number.
+ */
+ var isNaN = Number.isNaN || WINDOW.isNaN;
+
+ /**
+ * Check if the given value is a number.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a number, else `false`.
+ */
+ function isNumber(value) {
+ return typeof value === 'number' && !isNaN(value);
+ }
+
+ /**
+ * Check if the given value is undefined.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is undefined, else `false`.
+ */
+ function isUndefined(value) {
+ return typeof value === 'undefined';
+ }
+
+ /**
+ * Check if the given value is an object.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is an object, else `false`.
+ */
+ function isObject(value) {
+ return _typeof(value) === 'object' && value !== null;
+ }
+ var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+ /**
+ * Check if the given value is a plain object.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a plain object, else `false`.
+ */
+ function isPlainObject(value) {
+ if (!isObject(value)) {
+ return false;
+ }
+ try {
+ var _constructor = value.constructor;
+ var prototype = _constructor.prototype;
+ return _constructor && prototype && hasOwnProperty.call(prototype, 'isPrototypeOf');
+ } catch (error) {
+ return false;
+ }
+ }
+
+ /**
+ * Check if the given value is a function.
+ * @param {*} value - The value to check.
+ * @returns {boolean} Returns `true` if the given value is a function, else `false`.
+ */
+ function isFunction(value) {
+ return typeof value === 'function';
+ }
+
+ /**
+ * Iterate the given data.
+ * @param {*} data - The data to iterate.
+ * @param {Function} callback - The process function for each element.
+ * @returns {*} The original data.
+ */
+ function forEach(data, callback) {
+ if (data && isFunction(callback)) {
+ if (Array.isArray(data) || isNumber(data.length) /* array-like */) {
+ var length = data.length;
+ var i;
+ for (i = 0; i < length; i += 1) {
+ if (callback.call(data, data[i], i, data) === false) {
+ break;
+ }
+ }
+ } else if (isObject(data)) {
+ Object.keys(data).forEach(function (key) {
+ callback.call(data, data[key], key, data);
+ });
+ }
+ }
+ return data;
+ }
+
+ /**
+ * Extend the given object.
+ * @param {*} obj - The object to be extended.
+ * @param {*} args - The rest objects which will be merged to the first object.
+ * @returns {Object} The extended object.
+ */
+ var assign = Object.assign || function assign(obj) {
+ for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+ args[_key - 1] = arguments[_key];
+ }
+ if (isObject(obj) && args.length > 0) {
+ args.forEach(function (arg) {
+ if (isObject(arg)) {
+ Object.keys(arg).forEach(function (key) {
+ obj[key] = arg[key];
+ });
+ }
+ });
+ }
+ return obj;
+ };
+ var REGEXP_SUFFIX = /^(?:width|height|left|top|marginLeft|marginTop)$/;
+
+ /**
+ * Apply styles to the given element.
+ * @param {Element} element - The target element.
+ * @param {Object} styles - The styles for applying.
+ */
+ function setStyle(element, styles) {
+ var style = element.style;
+ forEach(styles, function (value, property) {
+ if (REGEXP_SUFFIX.test(property) && isNumber(value)) {
+ value += 'px';
+ }
+ style[property] = value;
+ });
+ }
+
+ /**
+ * Escape a string for using in HTML.
+ * @param {String} value - The string to escape.
+ * @returns {String} Returns the escaped string.
+ */
+ function escapeHTMLEntities(value) {
+ return isString(value) ? value.replace(/&(?!amp;|quot;|#39;|lt;|gt;)/g, '&amp;').replace(/"/g, '&quot;').replace(/'/g, '&#39;').replace(/</g, '&lt;').replace(/>/g, '&gt;') : value;
+ }
+
+ /**
+ * Check if the given element has a special class.
+ * @param {Element} element - The element to check.
+ * @param {string} value - The class to search.
+ * @returns {boolean} Returns `true` if the special class was found.
+ */
+ function hasClass(element, value) {
+ if (!element || !value) {
+ return false;
+ }
+ return element.classList ? element.classList.contains(value) : element.className.indexOf(value) > -1;
+ }
+
+ /**
+ * Add classes to the given element.
+ * @param {Element} element - The target element.
+ * @param {string} value - The classes to be added.
+ */
+ function addClass(element, value) {
+ if (!element || !value) {
+ return;
+ }
+ if (isNumber(element.length)) {
+ forEach(element, function (elem) {
+ addClass(elem, value);
+ });
+ return;
+ }
+ if (element.classList) {
+ element.classList.add(value);
+ return;
+ }
+ var className = element.className.trim();
+ if (!className) {
+ element.className = value;
+ } else if (className.indexOf(value) < 0) {
+ element.className = "".concat(className, " ").concat(value);
+ }
+ }
+
+ /**
+ * Remove classes from the given element.
+ * @param {Element} element - The target element.
+ * @param {string} value - The classes to be removed.
+ */
+ function removeClass(element, value) {
+ if (!element || !value) {
+ return;
+ }
+ if (isNumber(element.length)) {
+ forEach(element, function (elem) {
+ removeClass(elem, value);
+ });
+ return;
+ }
+ if (element.classList) {
+ element.classList.remove(value);
+ return;
+ }
+ if (element.className.indexOf(value) >= 0) {
+ element.className = element.className.replace(value, '');
+ }
+ }
+
+ /**
+ * Add or remove classes from the given element.
+ * @param {Element} element - The target element.
+ * @param {string} value - The classes to be toggled.
+ * @param {boolean} added - Add only.
+ */
+ function toggleClass(element, value, added) {
+ if (!value) {
+ return;
+ }
+ if (isNumber(element.length)) {
+ forEach(element, function (elem) {
+ toggleClass(elem, value, added);
+ });
+ return;
+ }
+
+ // IE10-11 doesn't support the second parameter of `classList.toggle`
+ if (added) {
+ addClass(element, value);
+ } else {
+ removeClass(element, value);
+ }
+ }
+ var REGEXP_HYPHENATE = /([a-z\d])([A-Z])/g;
+
+ /**
+ * Transform the given string from camelCase to kebab-case
+ * @param {string} value - The value to transform.
+ * @returns {string} The transformed value.
+ */
+ function hyphenate(value) {
+ return value.replace(REGEXP_HYPHENATE, '$1-$2').toLowerCase();
+ }
+
+ /**
+ * Get data from the given element.
+ * @param {Element} element - The target element.
+ * @param {string} name - The data key to get.
+ * @returns {string} The data value.
+ */
+ function getData(element, name) {
+ if (isObject(element[name])) {
+ return element[name];
+ }
+ if (element.dataset) {
+ return element.dataset[name];
+ }
+ return element.getAttribute("data-".concat(hyphenate(name)));
+ }
+
+ /**
+ * Set data to the given element.
+ * @param {Element} element - The target element.
+ * @param {string} name - The data key to set.
+ * @param {string} data - The data value.
+ */
+ function setData(element, name, data) {
+ if (isObject(data)) {
+ element[name] = data;
+ } else if (element.dataset) {
+ element.dataset[name] = data;
+ } else {
+ element.setAttribute("data-".concat(hyphenate(name)), data);
+ }
+ }
+ var onceSupported = function () {
+ var supported = false;
+ if (IS_BROWSER) {
+ var once = false;
+ var listener = function listener() {};
+ var options = Object.defineProperty({}, 'once', {
+ get: function get() {
+ supported = true;
+ return once;
+ },
+ /**
+ * This setter can fix a `TypeError` in strict mode
+ * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Getter_only}
+ * @param {boolean} value - The value to set
+ */
+ set: function set(value) {
+ once = value;
+ }
+ });
+ WINDOW.addEventListener('test', listener, options);
+ WINDOW.removeEventListener('test', listener, options);
+ }
+ return supported;
+ }();
+
+ /**
+ * Remove event listener from the target element.
+ * @param {Element} element - The event target.
+ * @param {string} type - The event type(s).
+ * @param {Function} listener - The event listener.
+ * @param {Object} options - The event options.
+ */
+ function removeListener(element, type, listener) {
+ var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
+ var handler = listener;
+ type.trim().split(REGEXP_SPACES).forEach(function (event) {
+ if (!onceSupported) {
+ var listeners = element.listeners;
+ if (listeners && listeners[event] && listeners[event][listener]) {
+ handler = listeners[event][listener];
+ delete listeners[event][listener];
+ if (Object.keys(listeners[event]).length === 0) {
+ delete listeners[event];
+ }
+ if (Object.keys(listeners).length === 0) {
+ delete element.listeners;
+ }
+ }
+ }
+ element.removeEventListener(event, handler, options);
+ });
+ }
+
+ /**
+ * Add event listener to the target element.
+ * @param {Element} element - The event target.
+ * @param {string} type - The event type(s).
+ * @param {Function} listener - The event listener.
+ * @param {Object} options - The event options.
+ */
+ function addListener(element, type, listener) {
+ var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
+ var _handler = listener;
+ type.trim().split(REGEXP_SPACES).forEach(function (event) {
+ if (options.once && !onceSupported) {
+ var _element$listeners = element.listeners,
+ listeners = _element$listeners === void 0 ? {} : _element$listeners;
+ _handler = function handler() {
+ delete listeners[event][listener];
+ element.removeEventListener(event, _handler, options);
+ for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+ args[_key2] = arguments[_key2];
+ }
+ listener.apply(element, args);
+ };
+ if (!listeners[event]) {
+ listeners[event] = {};
+ }
+ if (listeners[event][listener]) {
+ element.removeEventListener(event, listeners[event][listener], options);
+ }
+ listeners[event][listener] = _handler;
+ element.listeners = listeners;
+ }
+ element.addEventListener(event, _handler, options);
+ });
+ }
+
+ /**
+ * Dispatch event on the target element.
+ * @param {Element} element - The event target.
+ * @param {string} type - The event type(s).
+ * @param {Object} data - The additional event data.
+ * @param {Object} options - The additional event options.
+ * @returns {boolean} Indicate if the event is default prevented or not.
+ */
+ function dispatchEvent(element, type, data, options) {
+ var event;
+
+ // Event and CustomEvent on IE9-11 are global objects, not constructors
+ if (isFunction(Event) && isFunction(CustomEvent)) {
+ event = new CustomEvent(type, _objectSpread2({
+ bubbles: true,
+ cancelable: true,
+ detail: data
+ }, options));
+ } else {
+ event = document.createEvent('CustomEvent');
+ event.initCustomEvent(type, true, true, data);
+ }
+ return element.dispatchEvent(event);
+ }
+
+ /**
+ * Get the offset base on the document.
+ * @param {Element} element - The target element.
+ * @returns {Object} The offset data.
+ */
+ function getOffset(element) {
+ var box = element.getBoundingClientRect();
+ return {
+ left: box.left + (window.pageXOffset - document.documentElement.clientLeft),
+ top: box.top + (window.pageYOffset - document.documentElement.clientTop)
+ };
+ }
+
+ /**
+ * Get transforms base on the given object.
+ * @param {Object} obj - The target object.
+ * @returns {string} A string contains transform values.
+ */
+ function getTransforms(_ref) {
+ var rotate = _ref.rotate,
+ scaleX = _ref.scaleX,
+ scaleY = _ref.scaleY,
+ translateX = _ref.translateX,
+ translateY = _ref.translateY;
+ var values = [];
+ if (isNumber(translateX) && translateX !== 0) {
+ values.push("translateX(".concat(translateX, "px)"));
+ }
+ if (isNumber(translateY) && translateY !== 0) {
+ values.push("translateY(".concat(translateY, "px)"));
+ }
+
+ // Rotate should come first before scale to match orientation transform
+ if (isNumber(rotate) && rotate !== 0) {
+ values.push("rotate(".concat(rotate, "deg)"));
+ }
+ if (isNumber(scaleX) && scaleX !== 1) {
+ values.push("scaleX(".concat(scaleX, ")"));
+ }
+ if (isNumber(scaleY) && scaleY !== 1) {
+ values.push("scaleY(".concat(scaleY, ")"));
+ }
+ var transform = values.length ? values.join(' ') : 'none';
+ return {
+ WebkitTransform: transform,
+ msTransform: transform,
+ transform: transform
+ };
+ }
+
+ /**
+ * Get an image name from an image url.
+ * @param {string} url - The target url.
+ * @example
+ * // picture.jpg
+ * getImageNameFromURL('https://domain.com/path/to/picture.jpg?size=1280×960')
+ * @returns {string} A string contains the image name.
+ */
+ function getImageNameFromURL(url) {
+ return isString(url) ? decodeURIComponent(url.replace(/^.*\//, '').replace(/[?&#].*$/, '')) : '';
+ }
+ var IS_SAFARI = WINDOW.navigator && /(Macintosh|iPhone|iPod|iPad).*AppleWebKit/i.test(WINDOW.navigator.userAgent);
+
+ /**
+ * Get an image's natural sizes.
+ * @param {string} image - The target image.
+ * @param {Object} options - The viewer options.
+ * @param {Function} callback - The callback function.
+ * @returns {HTMLImageElement} The new image.
+ */
+ function getImageNaturalSizes(image, options, callback) {
+ var newImage = document.createElement('img');
+
+ // Modern browsers (except Safari)
+ if (image.naturalWidth && !IS_SAFARI) {
+ callback(image.naturalWidth, image.naturalHeight);
+ return newImage;
+ }
+ var body = document.body || document.documentElement;
+ newImage.onload = function () {
+ callback(newImage.width, newImage.height);
+ if (!IS_SAFARI) {
+ body.removeChild(newImage);
+ }
+ };
+ forEach(options.inheritedAttributes, function (name) {
+ var value = image.getAttribute(name);
+ if (value !== null) {
+ newImage.setAttribute(name, value);
+ }
+ });
+ newImage.src = image.src;
+
+ // iOS Safari will convert the image automatically
+ // with its orientation once append it into DOM
+ if (!IS_SAFARI) {
+ newImage.style.cssText = 'left:0;' + 'max-height:none!important;' + 'max-width:none!important;' + 'min-height:0!important;' + 'min-width:0!important;' + 'opacity:0;' + 'position:absolute;' + 'top:0;' + 'z-index:-1;';
+ body.appendChild(newImage);
+ }
+ return newImage;
+ }
+
+ /**
+ * Get the related class name of a responsive type number.
+ * @param {string} type - The responsive type.
+ * @returns {string} The related class name.
+ */
+ function getResponsiveClass(type) {
+ switch (type) {
+ case 2:
+ return CLASS_HIDE_XS_DOWN;
+ case 3:
+ return CLASS_HIDE_SM_DOWN;
+ case 4:
+ return CLASS_HIDE_MD_DOWN;
+ default:
+ return '';
+ }
+ }
+
+ /**
+ * Get the max ratio of a group of pointers.
+ * @param {string} pointers - The target pointers.
+ * @returns {number} The result ratio.
+ */
+ function getMaxZoomRatio(pointers) {
+ var pointers2 = _objectSpread2({}, pointers);
+ var ratios = [];
+ forEach(pointers, function (pointer, pointerId) {
+ delete pointers2[pointerId];
+ forEach(pointers2, function (pointer2) {
+ var x1 = Math.abs(pointer.startX - pointer2.startX);
+ var y1 = Math.abs(pointer.startY - pointer2.startY);
+ var x2 = Math.abs(pointer.endX - pointer2.endX);
+ var y2 = Math.abs(pointer.endY - pointer2.endY);
+ var z1 = Math.sqrt(x1 * x1 + y1 * y1);
+ var z2 = Math.sqrt(x2 * x2 + y2 * y2);
+ var ratio = (z2 - z1) / z1;
+ ratios.push(ratio);
+ });
+ });
+ ratios.sort(function (a, b) {
+ return Math.abs(a) < Math.abs(b);
+ });
+ return ratios[0];
+ }
+
+ /**
+ * Get a pointer from an event object.
+ * @param {Object} event - The target event object.
+ * @param {boolean} endOnly - Indicates if only returns the end point coordinate or not.
+ * @returns {Object} The result pointer contains start and/or end point coordinates.
+ */
+ function getPointer(_ref2, endOnly) {
+ var pageX = _ref2.pageX,
+ pageY = _ref2.pageY;
+ var end = {
+ endX: pageX,
+ endY: pageY
+ };
+ return endOnly ? end : _objectSpread2({
+ timeStamp: Date.now(),
+ startX: pageX,
+ startY: pageY
+ }, end);
+ }
+
+ /**
+ * Get the center point coordinate of a group of pointers.
+ * @param {Object} pointers - The target pointers.
+ * @returns {Object} The center point coordinate.
+ */
+ function getPointersCenter(pointers) {
+ var pageX = 0;
+ var pageY = 0;
+ var count = 0;
+ forEach(pointers, function (_ref3) {
+ var startX = _ref3.startX,
+ startY = _ref3.startY;
+ pageX += startX;
+ pageY += startY;
+ count += 1;
+ });
+ pageX /= count;
+ pageY /= count;
+ return {
+ pageX: pageX,
+ pageY: pageY
+ };
+ }
+
+ var render = {
+ render: function render() {
+ this.initContainer();
+ this.initViewer();
+ this.initList();
+ this.renderViewer();
+ },
+ initBody: function initBody() {
+ var ownerDocument = this.element.ownerDocument;
+ var body = ownerDocument.body || ownerDocument.documentElement;
+ this.body = body;
+ this.scrollbarWidth = window.innerWidth - ownerDocument.documentElement.clientWidth;
+ this.initialBodyPaddingRight = body.style.paddingRight;
+ this.initialBodyComputedPaddingRight = window.getComputedStyle(body).paddingRight;
+ },
+ initContainer: function initContainer() {
+ this.containerData = {
+ width: window.innerWidth,
+ height: window.innerHeight
+ };
+ },
+ initViewer: function initViewer() {
+ var options = this.options,
+ parent = this.parent;
+ var viewerData;
+ if (options.inline) {
+ viewerData = {
+ width: Math.max(parent.offsetWidth, options.minWidth),
+ height: Math.max(parent.offsetHeight, options.minHeight)
+ };
+ this.parentData = viewerData;
+ }
+ if (this.fulled || !viewerData) {
+ viewerData = this.containerData;
+ }
+ this.viewerData = assign({}, viewerData);
+ },
+ renderViewer: function renderViewer() {
+ if (this.options.inline && !this.fulled) {
+ setStyle(this.viewer, this.viewerData);
+ }
+ },
+ initList: function initList() {
+ var _this = this;
+ var element = this.element,
+ options = this.options,
+ list = this.list;
+ var items = [];
+
+ // initList may be called in this.update, so should keep idempotent
+ list.innerHTML = '';
+ forEach(this.images, function (image, index) {
+ var src = image.src;
+ var alt = image.alt || getImageNameFromURL(src);
+ var url = _this.getImageURL(image);
+ if (src || url) {
+ var item = document.createElement('li');
+ var img = document.createElement('img');
+ forEach(options.inheritedAttributes, function (name) {
+ var value = image.getAttribute(name);
+ if (value !== null) {
+ img.setAttribute(name, value);
+ }
+ });
+ if (options.navbar) {
+ img.src = src || url;
+ }
+ img.alt = alt;
+ img.setAttribute('data-original-url', url || src);
+ item.setAttribute('data-index', index);
+ item.setAttribute('data-viewer-action', 'view');
+ item.setAttribute('role', 'button');
+ if (options.keyboard) {
+ item.setAttribute('tabindex', 0);
+ }
+ item.appendChild(img);
+ list.appendChild(item);
+ items.push(item);
+ }
+ });
+ this.items = items;
+ forEach(items, function (item) {
+ var image = item.firstElementChild;
+ var onLoad;
+ var onError;
+ setData(image, 'filled', true);
+ if (options.loading) {
+ addClass(item, CLASS_LOADING);
+ }
+ addListener(image, EVENT_LOAD, onLoad = function onLoad(event) {
+ removeListener(image, EVENT_ERROR, onError);
+ if (options.loading) {
+ removeClass(item, CLASS_LOADING);
+ }
+ _this.loadImage(event);
+ }, {
+ once: true
+ });
+ addListener(image, EVENT_ERROR, onError = function onError() {
+ removeListener(image, EVENT_LOAD, onLoad);
+ if (options.loading) {
+ removeClass(item, CLASS_LOADING);
+ }
+ }, {
+ once: true
+ });
+ });
+ if (options.transition) {
+ addListener(element, EVENT_VIEWED, function () {
+ addClass(list, CLASS_TRANSITION);
+ }, {
+ once: true
+ });
+ }
+ },
+ renderList: function renderList() {
+ var index = this.index;
+ var item = this.items[index];
+ if (!item) {
+ return;
+ }
+ var next = item.nextElementSibling;
+ var gutter = parseInt(window.getComputedStyle(next || item).marginLeft, 10);
+ var offsetWidth = item.offsetWidth;
+ var outerWidth = offsetWidth + gutter;
+
+ // Place the active item in the center of the screen
+ setStyle(this.list, assign({
+ width: outerWidth * this.length - gutter
+ }, getTransforms({
+ translateX: (this.viewerData.width - offsetWidth) / 2 - outerWidth * index
+ })));
+ },
+ resetList: function resetList() {
+ var list = this.list;
+ list.innerHTML = '';
+ removeClass(list, CLASS_TRANSITION);
+ setStyle(list, getTransforms({
+ translateX: 0
+ }));
+ },
+ initImage: function initImage(done) {
+ var _this2 = this;
+ var options = this.options,
+ image = this.image,
+ viewerData = this.viewerData;
+ var footerHeight = this.footer.offsetHeight;
+ var viewerWidth = viewerData.width;
+ var viewerHeight = Math.max(viewerData.height - footerHeight, footerHeight);
+ var oldImageData = this.imageData || {};
+ var sizingImage;
+ this.imageInitializing = {
+ abort: function abort() {
+ sizingImage.onload = null;
+ }
+ };
+ sizingImage = getImageNaturalSizes(image, options, function (naturalWidth, naturalHeight) {
+ var aspectRatio = naturalWidth / naturalHeight;
+ var initialCoverage = Math.max(0, Math.min(1, options.initialCoverage));
+ var width = viewerWidth;
+ var height = viewerHeight;
+ _this2.imageInitializing = false;
+ if (viewerHeight * aspectRatio > viewerWidth) {
+ height = viewerWidth / aspectRatio;
+ } else {
+ width = viewerHeight * aspectRatio;
+ }
+ initialCoverage = isNumber(initialCoverage) ? initialCoverage : 0.9;
+ width = Math.min(width * initialCoverage, naturalWidth);
+ height = Math.min(height * initialCoverage, naturalHeight);
+ var left = (viewerWidth - width) / 2;
+ var top = (viewerHeight - height) / 2;
+ var imageData = {
+ left: left,
+ top: top,
+ x: left,
+ y: top,
+ width: width,
+ height: height,
+ oldRatio: 1,
+ ratio: width / naturalWidth,
+ aspectRatio: aspectRatio,
+ naturalWidth: naturalWidth,
+ naturalHeight: naturalHeight
+ };
+ var initialImageData = assign({}, imageData);
+ if (options.rotatable) {
+ imageData.rotate = oldImageData.rotate || 0;
+ initialImageData.rotate = 0;
+ }
+ if (options.scalable) {
+ imageData.scaleX = oldImageData.scaleX || 1;
+ imageData.scaleY = oldImageData.scaleY || 1;
+ initialImageData.scaleX = 1;
+ initialImageData.scaleY = 1;
+ }
+ _this2.imageData = imageData;
+ _this2.initialImageData = initialImageData;
+ if (done) {
+ done();
+ }
+ });
+ },
+ renderImage: function renderImage(done) {
+ var _this3 = this;
+ var image = this.image,
+ imageData = this.imageData;
+ setStyle(image, assign({
+ width: imageData.width,
+ height: imageData.height,
+ // XXX: Not to use translateX/Y to avoid image shaking when zooming
+ marginLeft: imageData.x,
+ marginTop: imageData.y
+ }, getTransforms(imageData)));
+ if (done) {
+ if ((this.viewing || this.moving || this.rotating || this.scaling || this.zooming) && this.options.transition && hasClass(image, CLASS_TRANSITION)) {
+ var onTransitionEnd = function onTransitionEnd() {
+ _this3.imageRendering = false;
+ done();
+ };
+ this.imageRendering = {
+ abort: function abort() {
+ removeListener(image, EVENT_TRANSITION_END, onTransitionEnd);
+ }
+ };
+ addListener(image, EVENT_TRANSITION_END, onTransitionEnd, {
+ once: true
+ });
+ } else {
+ done();
+ }
+ }
+ },
+ resetImage: function resetImage() {
+ // this.image only defined after viewed
+ if (this.viewing || this.viewed) {
+ var image = this.image;
+ if (this.viewing) {
+ this.viewing.abort();
+ }
+ image.parentNode.removeChild(image);
+ this.image = null;
+ }
+ }
+ };
+
+ var events = {
+ bind: function bind() {
+ var options = this.options,
+ viewer = this.viewer,
+ canvas = this.canvas;
+ var document = this.element.ownerDocument;
+ addListener(viewer, EVENT_CLICK, this.onClick = this.click.bind(this));
+ addListener(viewer, EVENT_DRAG_START, this.onDragStart = this.dragstart.bind(this));
+ addListener(canvas, EVENT_POINTER_DOWN, this.onPointerDown = this.pointerdown.bind(this));
+ addListener(document, EVENT_POINTER_MOVE, this.onPointerMove = this.pointermove.bind(this));
+ addListener(document, EVENT_POINTER_UP, this.onPointerUp = this.pointerup.bind(this));
+ addListener(document, EVENT_KEY_DOWN, this.onKeyDown = this.keydown.bind(this));
+ addListener(window, EVENT_RESIZE, this.onResize = this.resize.bind(this));
+ if (options.zoomable && options.zoomOnWheel) {
+ addListener(viewer, EVENT_WHEEL, this.onWheel = this.wheel.bind(this), {
+ passive: false,
+ capture: true
+ });
+ }
+ if (options.toggleOnDblclick) {
+ addListener(canvas, EVENT_DBLCLICK, this.onDblclick = this.dblclick.bind(this));
+ }
+ },
+ unbind: function unbind() {
+ var options = this.options,
+ viewer = this.viewer,
+ canvas = this.canvas;
+ var document = this.element.ownerDocument;
+ removeListener(viewer, EVENT_CLICK, this.onClick);
+ removeListener(viewer, EVENT_DRAG_START, this.onDragStart);
+ removeListener(canvas, EVENT_POINTER_DOWN, this.onPointerDown);
+ removeListener(document, EVENT_POINTER_MOVE, this.onPointerMove);
+ removeListener(document, EVENT_POINTER_UP, this.onPointerUp);
+ removeListener(document, EVENT_KEY_DOWN, this.onKeyDown);
+ removeListener(window, EVENT_RESIZE, this.onResize);
+ if (options.zoomable && options.zoomOnWheel) {
+ removeListener(viewer, EVENT_WHEEL, this.onWheel, {
+ passive: false,
+ capture: true
+ });
+ }
+ if (options.toggleOnDblclick) {
+ removeListener(canvas, EVENT_DBLCLICK, this.onDblclick);
+ }
+ }
+ };
+
+ var handlers = {
+ click: function click(event) {
+ var options = this.options,
+ imageData = this.imageData;
+ var target = event.target;
+ var action = getData(target, DATA_ACTION);
+ if (!action && target.localName === 'img' && target.parentElement.localName === 'li') {
+ target = target.parentElement;
+ action = getData(target, DATA_ACTION);
+ }
+
+ // Cancel the emulated click when the native click event was triggered.
+ if (IS_TOUCH_DEVICE && event.isTrusted && target === this.canvas) {
+ clearTimeout(this.clickCanvasTimeout);
+ }
+ switch (action) {
+ case 'mix':
+ if (this.played) {
+ this.stop();
+ } else if (options.inline) {
+ if (this.fulled) {
+ this.exit();
+ } else {
+ this.full();
+ }
+ } else {
+ this.hide();
+ }
+ break;
+ case 'hide':
+ if (!this.pointerMoved) {
+ this.hide();
+ }
+ break;
+ case 'view':
+ this.view(getData(target, 'index'));
+ break;
+ case 'zoom-in':
+ this.zoom(0.1, true);
+ break;
+ case 'zoom-out':
+ this.zoom(-0.1, true);
+ break;
+ case 'one-to-one':
+ this.toggle();
+ break;
+ case 'reset':
+ this.reset();
+ break;
+ case 'prev':
+ this.prev(options.loop);
+ break;
+ case 'play':
+ this.play(options.fullscreen);
+ break;
+ case 'next':
+ this.next(options.loop);
+ break;
+ case 'rotate-left':
+ this.rotate(-90);
+ break;
+ case 'rotate-right':
+ this.rotate(90);
+ break;
+ case 'flip-horizontal':
+ this.scaleX(-imageData.scaleX || -1);
+ break;
+ case 'flip-vertical':
+ this.scaleY(-imageData.scaleY || -1);
+ break;
+ default:
+ if (this.played) {
+ this.stop();
+ }
+ }
+ },
+ dblclick: function dblclick(event) {
+ event.preventDefault();
+ if (this.viewed && event.target === this.image) {
+ // Cancel the emulated double click when the native dblclick event was triggered.
+ if (IS_TOUCH_DEVICE && event.isTrusted) {
+ clearTimeout(this.doubleClickImageTimeout);
+ }
+
+ // XXX: No pageX/Y properties in custom event, fallback to the original event.
+ this.toggle(event.isTrusted ? event : event.detail && event.detail.originalEvent);
+ }
+ },
+ load: function load() {
+ var _this = this;
+ if (this.timeout) {
+ clearTimeout(this.timeout);
+ this.timeout = false;
+ }
+ var element = this.element,
+ options = this.options,
+ image = this.image,
+ index = this.index,
+ viewerData = this.viewerData;
+ removeClass(image, CLASS_INVISIBLE);
+ if (options.loading) {
+ removeClass(this.canvas, CLASS_LOADING);
+ }
+ image.style.cssText = 'height:0;' + "margin-left:".concat(viewerData.width / 2, "px;") + "margin-top:".concat(viewerData.height / 2, "px;") + 'max-width:none!important;' + 'position:relative;' + 'width:0;';
+ this.initImage(function () {
+ toggleClass(image, CLASS_MOVE, options.movable);
+ toggleClass(image, CLASS_TRANSITION, options.transition);
+ _this.renderImage(function () {
+ _this.viewed = true;
+ _this.viewing = false;
+ if (isFunction(options.viewed)) {
+ addListener(element, EVENT_VIEWED, options.viewed, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_VIEWED, {
+ originalImage: _this.images[index],
+ index: index,
+ image: image
+ }, {
+ cancelable: false
+ });
+ });
+ });
+ },
+ loadImage: function loadImage(event) {
+ var image = event.target;
+ var parent = image.parentNode;
+ var parentWidth = parent.offsetWidth || 30;
+ var parentHeight = parent.offsetHeight || 50;
+ var filled = !!getData(image, 'filled');
+ getImageNaturalSizes(image, this.options, function (naturalWidth, naturalHeight) {
+ var aspectRatio = naturalWidth / naturalHeight;
+ var width = parentWidth;
+ var height = parentHeight;
+ if (parentHeight * aspectRatio > parentWidth) {
+ if (filled) {
+ width = parentHeight * aspectRatio;
+ } else {
+ height = parentWidth / aspectRatio;
+ }
+ } else if (filled) {
+ height = parentWidth / aspectRatio;
+ } else {
+ width = parentHeight * aspectRatio;
+ }
+ setStyle(image, assign({
+ width: width,
+ height: height
+ }, getTransforms({
+ translateX: (parentWidth - width) / 2,
+ translateY: (parentHeight - height) / 2
+ })));
+ });
+ },
+ keydown: function keydown(event) {
+ var options = this.options;
+ if (!options.keyboard) {
+ return;
+ }
+ var keyCode = event.keyCode || event.which || event.charCode;
+ switch (keyCode) {
+ // Enter
+ case 13:
+ if (this.viewer.contains(event.target)) {
+ this.click(event);
+ }
+ break;
+ }
+ if (!this.fulled) {
+ return;
+ }
+ switch (keyCode) {
+ // Escape
+ case 27:
+ if (this.played) {
+ this.stop();
+ } else if (options.inline) {
+ if (this.fulled) {
+ this.exit();
+ }
+ } else {
+ this.hide();
+ }
+ break;
+
+ // Space
+ case 32:
+ if (this.played) {
+ this.stop();
+ }
+ break;
+
+ // ArrowLeft
+ case 37:
+ if (this.played && this.playing) {
+ this.playing.prev();
+ } else {
+ this.prev(options.loop);
+ }
+ break;
+
+ // ArrowUp
+ case 38:
+ // Prevent scroll on Firefox
+ event.preventDefault();
+
+ // Zoom in
+ this.zoom(options.zoomRatio, true);
+ break;
+
+ // ArrowRight
+ case 39:
+ if (this.played && this.playing) {
+ this.playing.next();
+ } else {
+ this.next(options.loop);
+ }
+ break;
+
+ // ArrowDown
+ case 40:
+ // Prevent scroll on Firefox
+ event.preventDefault();
+
+ // Zoom out
+ this.zoom(-options.zoomRatio, true);
+ break;
+
+ // Ctrl + 0
+ case 48:
+ // Fall through
+
+ // Ctrl + 1
+ // eslint-disable-next-line no-fallthrough
+ case 49:
+ if (event.ctrlKey) {
+ event.preventDefault();
+ this.toggle();
+ }
+ break;
+ }
+ },
+ dragstart: function dragstart(event) {
+ if (event.target.localName === 'img') {
+ event.preventDefault();
+ }
+ },
+ pointerdown: function pointerdown(event) {
+ var options = this.options,
+ pointers = this.pointers;
+ var buttons = event.buttons,
+ button = event.button;
+ this.pointerMoved = false;
+ if (!this.viewed || this.showing || this.viewing || this.hiding
+
+ // Handle mouse event and pointer event and ignore touch event
+ || (event.type === 'mousedown' || event.type === 'pointerdown' && event.pointerType === 'mouse') && (
+ // No primary button (Usually the left button)
+ isNumber(buttons) && buttons !== 1 || isNumber(button) && button !== 0
+
+ // Open context menu
+ || event.ctrlKey)) {
+ return;
+ }
+
+ // Prevent default behaviours as page zooming in touch devices.
+ event.preventDefault();
+ if (event.changedTouches) {
+ forEach(event.changedTouches, function (touch) {
+ pointers[touch.identifier] = getPointer(touch);
+ });
+ } else {
+ pointers[event.pointerId || 0] = getPointer(event);
+ }
+ var action = options.movable ? ACTION_MOVE : false;
+ if (options.zoomOnTouch && options.zoomable && Object.keys(pointers).length > 1) {
+ action = ACTION_ZOOM;
+ } else if (options.slideOnTouch && (event.pointerType === 'touch' || event.type === 'touchstart') && this.isSwitchable()) {
+ action = ACTION_SWITCH;
+ }
+ if (options.transition && (action === ACTION_MOVE || action === ACTION_ZOOM)) {
+ removeClass(this.image, CLASS_TRANSITION);
+ }
+ this.action = action;
+ },
+ pointermove: function pointermove(event) {
+ var pointers = this.pointers,
+ action = this.action;
+ if (!this.viewed || !action) {
+ return;
+ }
+ event.preventDefault();
+ this.pointerMoved = true;
+ if (event.changedTouches) {
+ forEach(event.changedTouches, function (touch) {
+ assign(pointers[touch.identifier] || {}, getPointer(touch, true));
+ });
+ } else {
+ assign(pointers[event.pointerId || 0] || {}, getPointer(event, true));
+ }
+ this.change(event);
+ },
+ pointerup: function pointerup(event) {
+ var _this2 = this;
+ var options = this.options,
+ action = this.action,
+ pointers = this.pointers;
+ var pointer;
+ if (event.changedTouches) {
+ forEach(event.changedTouches, function (touch) {
+ pointer = pointers[touch.identifier];
+ delete pointers[touch.identifier];
+ });
+ } else {
+ pointer = pointers[event.pointerId || 0];
+ delete pointers[event.pointerId || 0];
+ }
+ if (!action) {
+ return;
+ }
+ event.preventDefault();
+ if (options.transition && (action === ACTION_MOVE || action === ACTION_ZOOM)) {
+ addClass(this.image, CLASS_TRANSITION);
+ }
+ this.action = false;
+
+ // Emulate click and double click in touch devices to support backdrop and image zooming (#210).
+ if (IS_TOUCH_DEVICE && action !== ACTION_ZOOM && pointer && Date.now() - pointer.timeStamp < 500) {
+ clearTimeout(this.clickCanvasTimeout);
+ clearTimeout(this.doubleClickImageTimeout);
+ if (options.toggleOnDblclick && this.viewed && event.target === this.image) {
+ if (this.imageClicked) {
+ this.imageClicked = false;
+
+ // This timeout will be cleared later when a native dblclick event is triggering
+ this.doubleClickImageTimeout = setTimeout(function () {
+ dispatchEvent(_this2.image, EVENT_DBLCLICK, {
+ originalEvent: event
+ });
+ }, 50);
+ } else {
+ this.imageClicked = true;
+
+ // The default timing of a double click in Windows is 500 ms
+ this.doubleClickImageTimeout = setTimeout(function () {
+ _this2.imageClicked = false;
+ }, 500);
+ }
+ } else {
+ this.imageClicked = false;
+ if (options.backdrop && options.backdrop !== 'static' && event.target === this.canvas) {
+ // This timeout will be cleared later when a native click event is triggering
+ this.clickCanvasTimeout = setTimeout(function () {
+ dispatchEvent(_this2.canvas, EVENT_CLICK, {
+ originalEvent: event
+ });
+ }, 50);
+ }
+ }
+ }
+ },
+ resize: function resize() {
+ var _this3 = this;
+ if (!this.isShown || this.hiding) {
+ return;
+ }
+ if (this.fulled) {
+ this.close();
+ this.initBody();
+ this.open();
+ }
+ this.initContainer();
+ this.initViewer();
+ this.renderViewer();
+ this.renderList();
+ if (this.viewed) {
+ this.initImage(function () {
+ _this3.renderImage();
+ });
+ }
+ if (this.played) {
+ if (this.options.fullscreen && this.fulled && !(document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement)) {
+ this.stop();
+ return;
+ }
+ forEach(this.player.getElementsByTagName('img'), function (image) {
+ addListener(image, EVENT_LOAD, _this3.loadImage.bind(_this3), {
+ once: true
+ });
+ dispatchEvent(image, EVENT_LOAD);
+ });
+ }
+ },
+ wheel: function wheel(event) {
+ var _this4 = this;
+ if (!this.viewed) {
+ return;
+ }
+ event.preventDefault();
+
+ // Limit wheel speed to prevent zoom too fast
+ if (this.wheeling) {
+ return;
+ }
+ this.wheeling = true;
+ setTimeout(function () {
+ _this4.wheeling = false;
+ }, 50);
+ var ratio = Number(this.options.zoomRatio) || 0.1;
+ var delta = 1;
+ if (event.deltaY) {
+ delta = event.deltaY > 0 ? 1 : -1;
+ } else if (event.wheelDelta) {
+ delta = -event.wheelDelta / 120;
+ } else if (event.detail) {
+ delta = event.detail > 0 ? 1 : -1;
+ }
+ this.zoom(-delta * ratio, true, null, event);
+ }
+ };
+
+ var methods = {
+ /** Show the viewer (only available in modal mode)
+ * @param {boolean} [immediate=false] - Indicates if show the viewer immediately or not.
+ * @returns {Viewer} this
+ */
+ show: function show() {
+ var immediate = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var element = this.element,
+ options = this.options;
+ if (options.inline || this.showing || this.isShown || this.showing) {
+ return this;
+ }
+ if (!this.ready) {
+ this.build();
+ if (this.ready) {
+ this.show(immediate);
+ }
+ return this;
+ }
+ if (isFunction(options.show)) {
+ addListener(element, EVENT_SHOW, options.show, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_SHOW) === false || !this.ready) {
+ return this;
+ }
+ if (this.hiding) {
+ this.transitioning.abort();
+ }
+ this.showing = true;
+ this.open();
+ var viewer = this.viewer;
+ removeClass(viewer, CLASS_HIDE);
+ viewer.setAttribute('role', 'dialog');
+ viewer.setAttribute('aria-labelledby', this.title.id);
+ viewer.setAttribute('aria-modal', true);
+ viewer.removeAttribute('aria-hidden');
+ if (options.transition && !immediate) {
+ var shown = this.shown.bind(this);
+ this.transitioning = {
+ abort: function abort() {
+ removeListener(viewer, EVENT_TRANSITION_END, shown);
+ removeClass(viewer, CLASS_IN);
+ }
+ };
+ addClass(viewer, CLASS_TRANSITION);
+
+ // Force reflow to enable CSS3 transition
+ viewer.initialOffsetWidth = viewer.offsetWidth;
+ addListener(viewer, EVENT_TRANSITION_END, shown, {
+ once: true
+ });
+ addClass(viewer, CLASS_IN);
+ } else {
+ addClass(viewer, CLASS_IN);
+ this.shown();
+ }
+ return this;
+ },
+ /**
+ * Hide the viewer (only available in modal mode)
+ * @param {boolean} [immediate=false] - Indicates if hide the viewer immediately or not.
+ * @returns {Viewer} this
+ */
+ hide: function hide() {
+ var _this = this;
+ var immediate = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var element = this.element,
+ options = this.options;
+ if (options.inline || this.hiding || !(this.isShown || this.showing)) {
+ return this;
+ }
+ if (isFunction(options.hide)) {
+ addListener(element, EVENT_HIDE, options.hide, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_HIDE) === false) {
+ return this;
+ }
+ if (this.showing) {
+ this.transitioning.abort();
+ }
+ this.hiding = true;
+ if (this.played) {
+ this.stop();
+ } else if (this.viewing) {
+ this.viewing.abort();
+ }
+ var viewer = this.viewer,
+ image = this.image;
+ var hideImmediately = function hideImmediately() {
+ removeClass(viewer, CLASS_IN);
+ _this.hidden();
+ };
+ if (options.transition && !immediate) {
+ var onViewerTransitionEnd = function onViewerTransitionEnd(event) {
+ // Ignore all propagating `transitionend` events (#275).
+ if (event && event.target === viewer) {
+ removeListener(viewer, EVENT_TRANSITION_END, onViewerTransitionEnd);
+ _this.hidden();
+ }
+ };
+ var onImageTransitionEnd = function onImageTransitionEnd() {
+ // In case of show the viewer by `viewer.show(true)` previously (#407).
+ if (hasClass(viewer, CLASS_TRANSITION)) {
+ addListener(viewer, EVENT_TRANSITION_END, onViewerTransitionEnd);
+ removeClass(viewer, CLASS_IN);
+ } else {
+ hideImmediately();
+ }
+ };
+ this.transitioning = {
+ abort: function abort() {
+ if (_this.viewed && hasClass(image, CLASS_TRANSITION)) {
+ removeListener(image, EVENT_TRANSITION_END, onImageTransitionEnd);
+ } else if (hasClass(viewer, CLASS_TRANSITION)) {
+ removeListener(viewer, EVENT_TRANSITION_END, onViewerTransitionEnd);
+ }
+ }
+ };
+
+ // In case of hiding the viewer when holding on the image (#255),
+ // note that the `CLASS_TRANSITION` class will be removed on pointer down.
+ if (this.viewed && hasClass(image, CLASS_TRANSITION)) {
+ addListener(image, EVENT_TRANSITION_END, onImageTransitionEnd, {
+ once: true
+ });
+ this.zoomTo(0, false, null, null, true);
+ } else {
+ onImageTransitionEnd();
+ }
+ } else {
+ hideImmediately();
+ }
+ return this;
+ },
+ /**
+ * View one of the images with image's index
+ * @param {number} index - The index of the image to view.
+ * @returns {Viewer} this
+ */
+ view: function view() {
+ var _this2 = this;
+ var index = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.options.initialViewIndex;
+ index = Number(index) || 0;
+ if (this.hiding || this.played || index < 0 || index >= this.length || this.viewed && index === this.index) {
+ return this;
+ }
+ if (!this.isShown) {
+ this.index = index;
+ return this.show();
+ }
+ if (this.viewing) {
+ this.viewing.abort();
+ }
+ var element = this.element,
+ options = this.options,
+ title = this.title,
+ canvas = this.canvas;
+ var item = this.items[index];
+ var img = item.querySelector('img');
+ var url = getData(img, 'originalUrl');
+ var alt = img.getAttribute('alt');
+ var image = document.createElement('img');
+ forEach(options.inheritedAttributes, function (name) {
+ var value = img.getAttribute(name);
+ if (value !== null) {
+ image.setAttribute(name, value);
+ }
+ });
+ image.src = url;
+ image.alt = alt;
+ if (isFunction(options.view)) {
+ addListener(element, EVENT_VIEW, options.view, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_VIEW, {
+ originalImage: this.images[index],
+ index: index,
+ image: image
+ }) === false || !this.isShown || this.hiding || this.played) {
+ return this;
+ }
+ var activeItem = this.items[this.index];
+ if (activeItem) {
+ removeClass(activeItem, CLASS_ACTIVE);
+ activeItem.removeAttribute('aria-selected');
+ }
+ addClass(item, CLASS_ACTIVE);
+ item.setAttribute('aria-selected', true);
+ if (options.focus) {
+ item.focus();
+ }
+ this.image = image;
+ this.viewed = false;
+ this.index = index;
+ this.imageData = {};
+ addClass(image, CLASS_INVISIBLE);
+ if (options.loading) {
+ addClass(canvas, CLASS_LOADING);
+ }
+ canvas.innerHTML = '';
+ canvas.appendChild(image);
+
+ // Center current item
+ this.renderList();
+
+ // Clear title
+ title.innerHTML = '';
+
+ // Generate title after viewed
+ var onViewed = function onViewed() {
+ var imageData = _this2.imageData;
+ var render = Array.isArray(options.title) ? options.title[1] : options.title;
+ title.innerHTML = escapeHTMLEntities(isFunction(render) ? render.call(_this2, image, imageData) : "".concat(alt, " (").concat(imageData.naturalWidth, " \xD7 ").concat(imageData.naturalHeight, ")"));
+ };
+ var onLoad;
+ var onError;
+ addListener(element, EVENT_VIEWED, onViewed, {
+ once: true
+ });
+ this.viewing = {
+ abort: function abort() {
+ removeListener(element, EVENT_VIEWED, onViewed);
+ if (image.complete) {
+ if (_this2.imageRendering) {
+ _this2.imageRendering.abort();
+ } else if (_this2.imageInitializing) {
+ _this2.imageInitializing.abort();
+ }
+ } else {
+ // Cancel download to save bandwidth.
+ image.src = '';
+ removeListener(image, EVENT_LOAD, onLoad);
+ if (_this2.timeout) {
+ clearTimeout(_this2.timeout);
+ }
+ }
+ }
+ };
+ if (image.complete) {
+ this.load();
+ } else {
+ addListener(image, EVENT_LOAD, onLoad = function onLoad() {
+ removeListener(image, EVENT_ERROR, onError);
+ _this2.load();
+ }, {
+ once: true
+ });
+ addListener(image, EVENT_ERROR, onError = function onError() {
+ removeListener(image, EVENT_LOAD, onLoad);
+ if (_this2.timeout) {
+ clearTimeout(_this2.timeout);
+ _this2.timeout = false;
+ }
+ removeClass(image, CLASS_INVISIBLE);
+ if (options.loading) {
+ removeClass(_this2.canvas, CLASS_LOADING);
+ }
+ }, {
+ once: true
+ });
+ if (this.timeout) {
+ clearTimeout(this.timeout);
+ }
+
+ // Make the image visible if it fails to load within 1s
+ this.timeout = setTimeout(function () {
+ removeClass(image, CLASS_INVISIBLE);
+ _this2.timeout = false;
+ }, 1000);
+ }
+ return this;
+ },
+ /**
+ * View the previous image
+ * @param {boolean} [loop=false] - Indicate if view the last one
+ * when it is the first one at present.
+ * @returns {Viewer} this
+ */
+ prev: function prev() {
+ var loop = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var index = this.index - 1;
+ if (index < 0) {
+ index = loop ? this.length - 1 : 0;
+ }
+ this.view(index);
+ return this;
+ },
+ /**
+ * View the next image
+ * @param {boolean} [loop=false] - Indicate if view the first one
+ * when it is the last one at present.
+ * @returns {Viewer} this
+ */
+ next: function next() {
+ var loop = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ var maxIndex = this.length - 1;
+ var index = this.index + 1;
+ if (index > maxIndex) {
+ index = loop ? 0 : maxIndex;
+ }
+ this.view(index);
+ return this;
+ },
+ /**
+ * Move the image with relative offsets.
+ * @param {number} x - The moving distance in the horizontal direction.
+ * @param {number} [y=x] The moving distance in the vertical direction.
+ * @returns {Viewer} this
+ */
+ move: function move(x) {
+ var y = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : x;
+ var imageData = this.imageData;
+ this.moveTo(isUndefined(x) ? x : imageData.x + Number(x), isUndefined(y) ? y : imageData.y + Number(y));
+ return this;
+ },
+ /**
+ * Move the image to an absolute point.
+ * @param {number} x - The new position in the horizontal direction.
+ * @param {number} [y=x] - The new position in the vertical direction.
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @returns {Viewer} this
+ */
+ moveTo: function moveTo(x) {
+ var _this3 = this;
+ var y = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : x;
+ var _originalEvent = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
+ var element = this.element,
+ options = this.options,
+ imageData = this.imageData;
+ x = Number(x);
+ y = Number(y);
+ if (this.viewed && !this.played && options.movable) {
+ var oldX = imageData.x;
+ var oldY = imageData.y;
+ var changed = false;
+ if (isNumber(x)) {
+ changed = true;
+ } else {
+ x = oldX;
+ }
+ if (isNumber(y)) {
+ changed = true;
+ } else {
+ y = oldY;
+ }
+ if (changed) {
+ if (isFunction(options.move)) {
+ addListener(element, EVENT_MOVE, options.move, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_MOVE, {
+ x: x,
+ y: y,
+ oldX: oldX,
+ oldY: oldY,
+ originalEvent: _originalEvent
+ }) === false) {
+ return this;
+ }
+ imageData.x = x;
+ imageData.y = y;
+ imageData.left = x;
+ imageData.top = y;
+ this.moving = true;
+ this.renderImage(function () {
+ _this3.moving = false;
+ if (isFunction(options.moved)) {
+ addListener(element, EVENT_MOVED, options.moved, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_MOVED, {
+ x: x,
+ y: y,
+ oldX: oldX,
+ oldY: oldY,
+ originalEvent: _originalEvent
+ }, {
+ cancelable: false
+ });
+ });
+ }
+ }
+ return this;
+ },
+ /**
+ * Rotate the image with a relative degree.
+ * @param {number} degree - The rotate degree.
+ * @returns {Viewer} this
+ */
+ rotate: function rotate(degree) {
+ this.rotateTo((this.imageData.rotate || 0) + Number(degree));
+ return this;
+ },
+ /**
+ * Rotate the image to an absolute degree.
+ * @param {number} degree - The rotate degree.
+ * @returns {Viewer} this
+ */
+ rotateTo: function rotateTo(degree) {
+ var _this4 = this;
+ var element = this.element,
+ options = this.options,
+ imageData = this.imageData;
+ degree = Number(degree);
+ if (isNumber(degree) && this.viewed && !this.played && options.rotatable) {
+ var oldDegree = imageData.rotate;
+ if (isFunction(options.rotate)) {
+ addListener(element, EVENT_ROTATE, options.rotate, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_ROTATE, {
+ degree: degree,
+ oldDegree: oldDegree
+ }) === false) {
+ return this;
+ }
+ imageData.rotate = degree;
+ this.rotating = true;
+ this.renderImage(function () {
+ _this4.rotating = false;
+ if (isFunction(options.rotated)) {
+ addListener(element, EVENT_ROTATED, options.rotated, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_ROTATED, {
+ degree: degree,
+ oldDegree: oldDegree
+ }, {
+ cancelable: false
+ });
+ });
+ }
+ return this;
+ },
+ /**
+ * Scale the image on the x-axis.
+ * @param {number} scaleX - The scale ratio on the x-axis.
+ * @returns {Viewer} this
+ */
+ scaleX: function scaleX(_scaleX) {
+ this.scale(_scaleX, this.imageData.scaleY);
+ return this;
+ },
+ /**
+ * Scale the image on the y-axis.
+ * @param {number} scaleY - The scale ratio on the y-axis.
+ * @returns {Viewer} this
+ */
+ scaleY: function scaleY(_scaleY) {
+ this.scale(this.imageData.scaleX, _scaleY);
+ return this;
+ },
+ /**
+ * Scale the image.
+ * @param {number} scaleX - The scale ratio on the x-axis.
+ * @param {number} [scaleY=scaleX] - The scale ratio on the y-axis.
+ * @returns {Viewer} this
+ */
+ scale: function scale(scaleX) {
+ var _this5 = this;
+ var scaleY = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : scaleX;
+ var element = this.element,
+ options = this.options,
+ imageData = this.imageData;
+ scaleX = Number(scaleX);
+ scaleY = Number(scaleY);
+ if (this.viewed && !this.played && options.scalable) {
+ var oldScaleX = imageData.scaleX;
+ var oldScaleY = imageData.scaleY;
+ var changed = false;
+ if (isNumber(scaleX)) {
+ changed = true;
+ } else {
+ scaleX = oldScaleX;
+ }
+ if (isNumber(scaleY)) {
+ changed = true;
+ } else {
+ scaleY = oldScaleY;
+ }
+ if (changed) {
+ if (isFunction(options.scale)) {
+ addListener(element, EVENT_SCALE, options.scale, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_SCALE, {
+ scaleX: scaleX,
+ scaleY: scaleY,
+ oldScaleX: oldScaleX,
+ oldScaleY: oldScaleY
+ }) === false) {
+ return this;
+ }
+ imageData.scaleX = scaleX;
+ imageData.scaleY = scaleY;
+ this.scaling = true;
+ this.renderImage(function () {
+ _this5.scaling = false;
+ if (isFunction(options.scaled)) {
+ addListener(element, EVENT_SCALED, options.scaled, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_SCALED, {
+ scaleX: scaleX,
+ scaleY: scaleY,
+ oldScaleX: oldScaleX,
+ oldScaleY: oldScaleY
+ }, {
+ cancelable: false
+ });
+ });
+ }
+ }
+ return this;
+ },
+ /**
+ * Zoom the image with a relative ratio.
+ * @param {number} ratio - The target ratio.
+ * @param {boolean} [showTooltip=false] - Indicates whether to show the tooltip.
+ * @param {Object} [pivot] - The pivot point coordinate for zooming.
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @returns {Viewer} this
+ */
+ zoom: function zoom(ratio) {
+ var showTooltip = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+ var pivot = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
+ var _originalEvent = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
+ var imageData = this.imageData;
+ ratio = Number(ratio);
+ if (ratio < 0) {
+ ratio = 1 / (1 - ratio);
+ } else {
+ ratio = 1 + ratio;
+ }
+ this.zoomTo(imageData.width * ratio / imageData.naturalWidth, showTooltip, pivot, _originalEvent);
+ return this;
+ },
+ /**
+ * Zoom the image to an absolute ratio.
+ * @param {number} ratio - The target ratio.
+ * @param {boolean} [showTooltip] - Indicates whether to show the tooltip.
+ * @param {Object} [pivot] - The pivot point coordinate for zooming.
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @param {Event} [_zoomable=false] - Indicates if the current zoom is available or not.
+ * @returns {Viewer} this
+ */
+ zoomTo: function zoomTo(ratio) {
+ var _this6 = this;
+ var showTooltip = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+ var pivot = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
+ var _originalEvent = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
+ var _zoomable = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : false;
+ var element = this.element,
+ options = this.options,
+ pointers = this.pointers,
+ imageData = this.imageData;
+ var x = imageData.x,
+ y = imageData.y,
+ width = imageData.width,
+ height = imageData.height,
+ naturalWidth = imageData.naturalWidth,
+ naturalHeight = imageData.naturalHeight;
+ ratio = Math.max(0, ratio);
+ if (isNumber(ratio) && this.viewed && !this.played && (_zoomable || options.zoomable)) {
+ if (!_zoomable) {
+ var minZoomRatio = Math.max(0.01, options.minZoomRatio);
+ var maxZoomRatio = Math.min(100, options.maxZoomRatio);
+ ratio = Math.min(Math.max(ratio, minZoomRatio), maxZoomRatio);
+ }
+ if (_originalEvent) {
+ switch (_originalEvent.type) {
+ case 'wheel':
+ if (options.zoomRatio >= 0.055 && ratio > 0.95 && ratio < 1.05) {
+ ratio = 1;
+ }
+ break;
+ case 'pointermove':
+ case 'touchmove':
+ case 'mousemove':
+ if (ratio > 0.99 && ratio < 1.01) {
+ ratio = 1;
+ }
+ break;
+ }
+ }
+ var newWidth = naturalWidth * ratio;
+ var newHeight = naturalHeight * ratio;
+ var offsetWidth = newWidth - width;
+ var offsetHeight = newHeight - height;
+ var oldRatio = imageData.ratio;
+ if (isFunction(options.zoom)) {
+ addListener(element, EVENT_ZOOM, options.zoom, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_ZOOM, {
+ ratio: ratio,
+ oldRatio: oldRatio,
+ originalEvent: _originalEvent
+ }) === false) {
+ return this;
+ }
+ this.zooming = true;
+ if (_originalEvent) {
+ var offset = getOffset(this.viewer);
+ var center = pointers && Object.keys(pointers).length > 0 ? getPointersCenter(pointers) : {
+ pageX: _originalEvent.pageX,
+ pageY: _originalEvent.pageY
+ };
+
+ // Zoom from the triggering point of the event
+ imageData.x -= offsetWidth * ((center.pageX - offset.left - x) / width);
+ imageData.y -= offsetHeight * ((center.pageY - offset.top - y) / height);
+ } else if (isPlainObject(pivot) && isNumber(pivot.x) && isNumber(pivot.y)) {
+ imageData.x -= offsetWidth * ((pivot.x - x) / width);
+ imageData.y -= offsetHeight * ((pivot.y - y) / height);
+ } else {
+ // Zoom from the center of the image
+ imageData.x -= offsetWidth / 2;
+ imageData.y -= offsetHeight / 2;
+ }
+ imageData.left = imageData.x;
+ imageData.top = imageData.y;
+ imageData.width = newWidth;
+ imageData.height = newHeight;
+ imageData.oldRatio = oldRatio;
+ imageData.ratio = ratio;
+ this.renderImage(function () {
+ _this6.zooming = false;
+ if (isFunction(options.zoomed)) {
+ addListener(element, EVENT_ZOOMED, options.zoomed, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_ZOOMED, {
+ ratio: ratio,
+ oldRatio: oldRatio,
+ originalEvent: _originalEvent
+ }, {
+ cancelable: false
+ });
+ });
+ if (showTooltip) {
+ this.tooltip();
+ }
+ }
+ return this;
+ },
+ /**
+ * Play the images
+ * @param {boolean|FullscreenOptions} [fullscreen=false] - Indicate if request fullscreen or not.
+ * @returns {Viewer} this
+ */
+ play: function play() {
+ var _this7 = this;
+ var fullscreen = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
+ if (!this.isShown || this.played) {
+ return this;
+ }
+ var element = this.element,
+ options = this.options;
+ if (isFunction(options.play)) {
+ addListener(element, EVENT_PLAY, options.play, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_PLAY) === false) {
+ return this;
+ }
+ var player = this.player;
+ var onLoad = this.loadImage.bind(this);
+ var list = [];
+ var total = 0;
+ var index = 0;
+ this.played = true;
+ this.onLoadWhenPlay = onLoad;
+ if (fullscreen) {
+ this.requestFullscreen(fullscreen);
+ }
+ addClass(player, CLASS_SHOW);
+ forEach(this.items, function (item, i) {
+ var img = item.querySelector('img');
+ var image = document.createElement('img');
+ image.src = getData(img, 'originalUrl');
+ image.alt = img.getAttribute('alt');
+ image.referrerPolicy = img.referrerPolicy;
+ total += 1;
+ addClass(image, CLASS_FADE);
+ toggleClass(image, CLASS_TRANSITION, options.transition);
+ if (hasClass(item, CLASS_ACTIVE)) {
+ addClass(image, CLASS_IN);
+ index = i;
+ }
+ list.push(image);
+ addListener(image, EVENT_LOAD, onLoad, {
+ once: true
+ });
+ player.appendChild(image);
+ });
+ if (isNumber(options.interval) && options.interval > 0) {
+ var prev = function prev() {
+ clearTimeout(_this7.playing.timeout);
+ removeClass(list[index], CLASS_IN);
+ index -= 1;
+ index = index >= 0 ? index : total - 1;
+ addClass(list[index], CLASS_IN);
+ _this7.playing.timeout = setTimeout(prev, options.interval);
+ };
+ var next = function next() {
+ clearTimeout(_this7.playing.timeout);
+ removeClass(list[index], CLASS_IN);
+ index += 1;
+ index = index < total ? index : 0;
+ addClass(list[index], CLASS_IN);
+ _this7.playing.timeout = setTimeout(next, options.interval);
+ };
+ if (total > 1) {
+ this.playing = {
+ prev: prev,
+ next: next,
+ timeout: setTimeout(next, options.interval)
+ };
+ }
+ }
+ return this;
+ },
+ // Stop play
+ stop: function stop() {
+ var _this8 = this;
+ if (!this.played) {
+ return this;
+ }
+ var element = this.element,
+ options = this.options;
+ if (isFunction(options.stop)) {
+ addListener(element, EVENT_STOP, options.stop, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_STOP) === false) {
+ return this;
+ }
+ var player = this.player;
+ clearTimeout(this.playing.timeout);
+ this.playing = false;
+ this.played = false;
+ forEach(player.getElementsByTagName('img'), function (image) {
+ removeListener(image, EVENT_LOAD, _this8.onLoadWhenPlay);
+ });
+ removeClass(player, CLASS_SHOW);
+ player.innerHTML = '';
+ this.exitFullscreen();
+ return this;
+ },
+ // Enter modal mode (only available in inline mode)
+ full: function full() {
+ var _this9 = this;
+ var options = this.options,
+ viewer = this.viewer,
+ image = this.image,
+ list = this.list;
+ if (!this.isShown || this.played || this.fulled || !options.inline) {
+ return this;
+ }
+ this.fulled = true;
+ this.open();
+ addClass(this.button, CLASS_FULLSCREEN_EXIT);
+ if (options.transition) {
+ removeClass(list, CLASS_TRANSITION);
+ if (this.viewed) {
+ removeClass(image, CLASS_TRANSITION);
+ }
+ }
+ addClass(viewer, CLASS_FIXED);
+ viewer.setAttribute('role', 'dialog');
+ viewer.setAttribute('aria-labelledby', this.title.id);
+ viewer.setAttribute('aria-modal', true);
+ viewer.removeAttribute('style');
+ setStyle(viewer, {
+ zIndex: options.zIndex
+ });
+ if (options.focus) {
+ this.enforceFocus();
+ }
+ this.initContainer();
+ this.viewerData = assign({}, this.containerData);
+ this.renderList();
+ if (this.viewed) {
+ this.initImage(function () {
+ _this9.renderImage(function () {
+ if (options.transition) {
+ setTimeout(function () {
+ addClass(image, CLASS_TRANSITION);
+ addClass(list, CLASS_TRANSITION);
+ }, 0);
+ }
+ });
+ });
+ }
+ return this;
+ },
+ // Exit modal mode (only available in inline mode)
+ exit: function exit() {
+ var _this10 = this;
+ var options = this.options,
+ viewer = this.viewer,
+ image = this.image,
+ list = this.list;
+ if (!this.isShown || this.played || !this.fulled || !options.inline) {
+ return this;
+ }
+ this.fulled = false;
+ this.close();
+ removeClass(this.button, CLASS_FULLSCREEN_EXIT);
+ if (options.transition) {
+ removeClass(list, CLASS_TRANSITION);
+ if (this.viewed) {
+ removeClass(image, CLASS_TRANSITION);
+ }
+ }
+ if (options.focus) {
+ this.clearEnforceFocus();
+ }
+ viewer.removeAttribute('role');
+ viewer.removeAttribute('aria-labelledby');
+ viewer.removeAttribute('aria-modal');
+ removeClass(viewer, CLASS_FIXED);
+ setStyle(viewer, {
+ zIndex: options.zIndexInline
+ });
+ this.viewerData = assign({}, this.parentData);
+ this.renderViewer();
+ this.renderList();
+ if (this.viewed) {
+ this.initImage(function () {
+ _this10.renderImage(function () {
+ if (options.transition) {
+ setTimeout(function () {
+ addClass(image, CLASS_TRANSITION);
+ addClass(list, CLASS_TRANSITION);
+ }, 0);
+ }
+ });
+ });
+ }
+ return this;
+ },
+ // Show the current ratio of the image with percentage
+ tooltip: function tooltip() {
+ var _this11 = this;
+ var options = this.options,
+ tooltipBox = this.tooltipBox,
+ imageData = this.imageData;
+ if (!this.viewed || this.played || !options.tooltip) {
+ return this;
+ }
+ tooltipBox.textContent = "".concat(Math.round(imageData.ratio * 100), "%");
+ if (!this.tooltipping) {
+ if (options.transition) {
+ if (this.fading) {
+ dispatchEvent(tooltipBox, EVENT_TRANSITION_END);
+ }
+ addClass(tooltipBox, CLASS_SHOW);
+ addClass(tooltipBox, CLASS_FADE);
+ addClass(tooltipBox, CLASS_TRANSITION);
+ tooltipBox.removeAttribute('aria-hidden');
+
+ // Force reflow to enable CSS3 transition
+ tooltipBox.initialOffsetWidth = tooltipBox.offsetWidth;
+ addClass(tooltipBox, CLASS_IN);
+ } else {
+ addClass(tooltipBox, CLASS_SHOW);
+ tooltipBox.removeAttribute('aria-hidden');
+ }
+ } else {
+ clearTimeout(this.tooltipping);
+ }
+ this.tooltipping = setTimeout(function () {
+ if (options.transition) {
+ addListener(tooltipBox, EVENT_TRANSITION_END, function () {
+ removeClass(tooltipBox, CLASS_SHOW);
+ removeClass(tooltipBox, CLASS_FADE);
+ removeClass(tooltipBox, CLASS_TRANSITION);
+ tooltipBox.setAttribute('aria-hidden', true);
+ _this11.fading = false;
+ }, {
+ once: true
+ });
+ removeClass(tooltipBox, CLASS_IN);
+ _this11.fading = true;
+ } else {
+ removeClass(tooltipBox, CLASS_SHOW);
+ tooltipBox.setAttribute('aria-hidden', true);
+ }
+ _this11.tooltipping = false;
+ }, 1000);
+ return this;
+ },
+ /**
+ * Toggle the image size between its current size and natural size
+ * @param {Event} [_originalEvent=null] - The original event if any.
+ * @returns {Viewer} this
+ */
+ toggle: function toggle() {
+ var _originalEvent = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
+ if (this.imageData.ratio === 1) {
+ this.zoomTo(this.imageData.oldRatio, true, null, _originalEvent);
+ } else {
+ this.zoomTo(1, true, null, _originalEvent);
+ }
+ return this;
+ },
+ // Reset the image to its initial state
+ reset: function reset() {
+ if (this.viewed && !this.played) {
+ this.imageData = assign({}, this.initialImageData);
+ this.renderImage();
+ }
+ return this;
+ },
+ // Update viewer when images changed
+ update: function update() {
+ var _this12 = this;
+ var element = this.element,
+ options = this.options,
+ isImg = this.isImg;
+
+ // Destroy viewer if the target image was deleted
+ if (isImg && !element.parentNode) {
+ return this.destroy();
+ }
+ var images = [];
+ forEach(isImg ? [element] : element.querySelectorAll('img'), function (image) {
+ if (isFunction(options.filter)) {
+ if (options.filter.call(_this12, image)) {
+ images.push(image);
+ }
+ } else if (_this12.getImageURL(image)) {
+ images.push(image);
+ }
+ });
+ if (!images.length) {
+ return this;
+ }
+ this.images = images;
+ this.length = images.length;
+ if (this.ready) {
+ var changedIndexes = [];
+ forEach(this.items, function (item, i) {
+ var img = item.querySelector('img');
+ var image = images[i];
+ if (image && img) {
+ if (image.src !== img.src
+
+ // Title changed (#408)
+ || image.alt !== img.alt) {
+ changedIndexes.push(i);
+ }
+ } else {
+ changedIndexes.push(i);
+ }
+ });
+ setStyle(this.list, {
+ width: 'auto'
+ });
+ this.initList();
+ if (this.isShown) {
+ if (this.length) {
+ if (this.viewed) {
+ var changedIndex = changedIndexes.indexOf(this.index);
+ if (changedIndex >= 0) {
+ this.viewed = false;
+ this.view(Math.max(Math.min(this.index - changedIndex, this.length - 1), 0));
+ } else {
+ var activeItem = this.items[this.index];
+
+ // Reactivate the current viewing item after reset the list.
+ addClass(activeItem, CLASS_ACTIVE);
+ activeItem.setAttribute('aria-selected', true);
+ }
+ }
+ } else {
+ this.image = null;
+ this.viewed = false;
+ this.index = 0;
+ this.imageData = {};
+ this.canvas.innerHTML = '';
+ this.title.innerHTML = '';
+ }
+ }
+ } else {
+ this.build();
+ }
+ return this;
+ },
+ // Destroy the viewer
+ destroy: function destroy() {
+ var element = this.element,
+ options = this.options;
+ if (!element[NAMESPACE]) {
+ return this;
+ }
+ this.destroyed = true;
+ if (this.ready) {
+ if (this.played) {
+ this.stop();
+ }
+ if (options.inline) {
+ if (this.fulled) {
+ this.exit();
+ }
+ this.unbind();
+ } else if (this.isShown) {
+ if (this.viewing) {
+ if (this.imageRendering) {
+ this.imageRendering.abort();
+ } else if (this.imageInitializing) {
+ this.imageInitializing.abort();
+ }
+ }
+ if (this.hiding) {
+ this.transitioning.abort();
+ }
+ this.hidden();
+ } else if (this.showing) {
+ this.transitioning.abort();
+ this.hidden();
+ }
+ this.ready = false;
+ this.viewer.parentNode.removeChild(this.viewer);
+ } else if (options.inline) {
+ if (this.delaying) {
+ this.delaying.abort();
+ } else if (this.initializing) {
+ this.initializing.abort();
+ }
+ }
+ if (!options.inline) {
+ removeListener(element, EVENT_CLICK, this.onStart);
+ }
+ element[NAMESPACE] = undefined;
+ return this;
+ }
+ };
+
+ var others = {
+ getImageURL: function getImageURL(image) {
+ var url = this.options.url;
+ if (isString(url)) {
+ url = image.getAttribute(url);
+ } else if (isFunction(url)) {
+ url = url.call(this, image);
+ } else {
+ url = '';
+ }
+ return url;
+ },
+ enforceFocus: function enforceFocus() {
+ var _this = this;
+ this.clearEnforceFocus();
+ addListener(document, EVENT_FOCUSIN, this.onFocusin = function (event) {
+ var viewer = _this.viewer;
+ var target = event.target;
+ if (target === document || target === viewer || viewer.contains(target)) {
+ return;
+ }
+ while (target) {
+ // Avoid conflicts with other modals (#474, #540)
+ if (target.getAttribute('tabindex') !== null || target.getAttribute('aria-modal') === 'true') {
+ return;
+ }
+ target = target.parentElement;
+ }
+ viewer.focus();
+ });
+ },
+ clearEnforceFocus: function clearEnforceFocus() {
+ if (this.onFocusin) {
+ removeListener(document, EVENT_FOCUSIN, this.onFocusin);
+ this.onFocusin = null;
+ }
+ },
+ open: function open() {
+ var body = this.body;
+ addClass(body, CLASS_OPEN);
+ if (this.scrollbarWidth > 0) {
+ body.style.paddingRight = "".concat(this.scrollbarWidth + (parseFloat(this.initialBodyComputedPaddingRight) || 0), "px");
+ }
+ },
+ close: function close() {
+ var body = this.body;
+ removeClass(body, CLASS_OPEN);
+ if (this.scrollbarWidth > 0) {
+ body.style.paddingRight = this.initialBodyPaddingRight;
+ }
+ },
+ shown: function shown() {
+ var element = this.element,
+ options = this.options,
+ viewer = this.viewer;
+ this.fulled = true;
+ this.isShown = true;
+ this.render();
+ this.bind();
+ this.showing = false;
+ if (options.focus) {
+ viewer.focus();
+ this.enforceFocus();
+ }
+ if (isFunction(options.shown)) {
+ addListener(element, EVENT_SHOWN, options.shown, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_SHOWN) === false) {
+ return;
+ }
+ if (this.ready && this.isShown && !this.hiding) {
+ this.view(this.index);
+ }
+ },
+ hidden: function hidden() {
+ var element = this.element,
+ options = this.options,
+ viewer = this.viewer;
+ if (options.fucus) {
+ this.clearEnforceFocus();
+ }
+ this.fulled = false;
+ this.viewed = false;
+ this.isShown = false;
+ this.close();
+ this.unbind();
+ addClass(viewer, CLASS_HIDE);
+ viewer.removeAttribute('role');
+ viewer.removeAttribute('aria-labelledby');
+ viewer.removeAttribute('aria-modal');
+ viewer.setAttribute('aria-hidden', true);
+ this.resetList();
+ this.resetImage();
+ this.hiding = false;
+ if (!this.destroyed) {
+ if (isFunction(options.hidden)) {
+ addListener(element, EVENT_HIDDEN, options.hidden, {
+ once: true
+ });
+ }
+ dispatchEvent(element, EVENT_HIDDEN, null, {
+ cancelable: false
+ });
+ }
+ },
+ requestFullscreen: function requestFullscreen(options) {
+ var document = this.element.ownerDocument;
+ if (this.fulled && !(document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement)) {
+ var documentElement = document.documentElement;
+
+ // Element.requestFullscreen()
+ if (documentElement.requestFullscreen) {
+ // Avoid TypeError when convert `options` to dictionary
+ if (isPlainObject(options)) {
+ documentElement.requestFullscreen(options);
+ } else {
+ documentElement.requestFullscreen();
+ }
+ } else if (documentElement.webkitRequestFullscreen) {
+ documentElement.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
+ } else if (documentElement.mozRequestFullScreen) {
+ documentElement.mozRequestFullScreen();
+ } else if (documentElement.msRequestFullscreen) {
+ documentElement.msRequestFullscreen();
+ }
+ }
+ },
+ exitFullscreen: function exitFullscreen() {
+ var document = this.element.ownerDocument;
+ if (this.fulled && (document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement)) {
+ // Document.exitFullscreen()
+ if (document.exitFullscreen) {
+ document.exitFullscreen();
+ } else if (document.webkitExitFullscreen) {
+ document.webkitExitFullscreen();
+ } else if (document.mozCancelFullScreen) {
+ document.mozCancelFullScreen();
+ } else if (document.msExitFullscreen) {
+ document.msExitFullscreen();
+ }
+ }
+ },
+ change: function change(event) {
+ var options = this.options,
+ pointers = this.pointers;
+ var pointer = pointers[Object.keys(pointers)[0]];
+
+ // In the case of the `pointers` object is empty (#421)
+ if (!pointer) {
+ return;
+ }
+ var offsetX = pointer.endX - pointer.startX;
+ var offsetY = pointer.endY - pointer.startY;
+ switch (this.action) {
+ // Move the current image
+ case ACTION_MOVE:
+ this.move(offsetX, offsetY, event);
+ break;
+
+ // Zoom the current image
+ case ACTION_ZOOM:
+ this.zoom(getMaxZoomRatio(pointers), false, null, event);
+ break;
+ case ACTION_SWITCH:
+ {
+ this.action = 'switched';
+ var absoluteOffsetX = Math.abs(offsetX);
+ if (absoluteOffsetX > 1 && absoluteOffsetX > Math.abs(offsetY)) {
+ // Empty `pointers` as `touchend` event will not be fired after swiped in iOS browsers.
+ this.pointers = {};
+ if (offsetX > 1) {
+ this.prev(options.loop);
+ } else if (offsetX < -1) {
+ this.next(options.loop);
+ }
+ }
+ break;
+ }
+ }
+
+ // Override
+ forEach(pointers, function (p) {
+ p.startX = p.endX;
+ p.startY = p.endY;
+ });
+ },
+ isSwitchable: function isSwitchable() {
+ var imageData = this.imageData,
+ viewerData = this.viewerData;
+ return this.length > 1 && imageData.x >= 0 && imageData.y >= 0 && imageData.width <= viewerData.width && imageData.height <= viewerData.height;
+ }
+ };
+
+ var AnotherViewer = WINDOW.Viewer;
+ var getUniqueID = function (id) {
+ return function () {
+ id += 1;
+ return id;
+ };
+ }(-1);
+ var Viewer = /*#__PURE__*/function () {
+ /**
+ * Create a new Viewer.
+ * @param {Element} element - The target element for viewing.
+ * @param {Object} [options={}] - The configuration options.
+ */
+ function Viewer(element) {
+ var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+ _classCallCheck(this, Viewer);
+ if (!element || element.nodeType !== 1) {
+ throw new Error('The first argument is required and must be an element.');
+ }
+ this.element = element;
+ this.options = assign({}, DEFAULTS, isPlainObject(options) && options);
+ this.action = false;
+ this.fading = false;
+ this.fulled = false;
+ this.hiding = false;
+ this.imageClicked = false;
+ this.imageData = {};
+ this.index = this.options.initialViewIndex;
+ this.isImg = false;
+ this.isShown = false;
+ this.length = 0;
+ this.moving = false;
+ this.played = false;
+ this.playing = false;
+ this.pointers = {};
+ this.ready = false;
+ this.rotating = false;
+ this.scaling = false;
+ this.showing = false;
+ this.timeout = false;
+ this.tooltipping = false;
+ this.viewed = false;
+ this.viewing = false;
+ this.wheeling = false;
+ this.zooming = false;
+ this.pointerMoved = false;
+ this.id = getUniqueID();
+ this.init();
+ }
+ _createClass(Viewer, [{
+ key: "init",
+ value: function init() {
+ var _this = this;
+ var element = this.element,
+ options = this.options;
+ if (element[NAMESPACE]) {
+ return;
+ }
+ element[NAMESPACE] = this;
+
+ // The `focus` option requires the `keyboard` option set to `true`.
+ if (options.focus && !options.keyboard) {
+ options.focus = false;
+ }
+ var isImg = element.localName === 'img';
+ var images = [];
+ forEach(isImg ? [element] : element.querySelectorAll('img'), function (image) {
+ if (isFunction(options.filter)) {
+ if (options.filter.call(_this, image)) {
+ images.push(image);
+ }
+ } else if (_this.getImageURL(image)) {
+ images.push(image);
+ }
+ });
+ this.isImg = isImg;
+ this.length = images.length;
+ this.images = images;
+ this.initBody();
+
+ // Override `transition` option if it is not supported
+ if (isUndefined(document.createElement(NAMESPACE).style.transition)) {
+ options.transition = false;
+ }
+ if (options.inline) {
+ var count = 0;
+ var progress = function progress() {
+ count += 1;
+ if (count === _this.length) {
+ var timeout;
+ _this.initializing = false;
+ _this.delaying = {
+ abort: function abort() {
+ clearTimeout(timeout);
+ }
+ };
+
+ // build asynchronously to keep `this.viewer` is accessible in `ready` event handler.
+ timeout = setTimeout(function () {
+ _this.delaying = false;
+ _this.build();
+ }, 0);
+ }
+ };
+ this.initializing = {
+ abort: function abort() {
+ forEach(images, function (image) {
+ if (!image.complete) {
+ removeListener(image, EVENT_LOAD, progress);
+ removeListener(image, EVENT_ERROR, progress);
+ }
+ });
+ }
+ };
+ forEach(images, function (image) {
+ if (image.complete) {
+ progress();
+ } else {
+ var onLoad;
+ var onError;
+ addListener(image, EVENT_LOAD, onLoad = function onLoad() {
+ removeListener(image, EVENT_ERROR, onError);
+ progress();
+ }, {
+ once: true
+ });
+ addListener(image, EVENT_ERROR, onError = function onError() {
+ removeListener(image, EVENT_LOAD, onLoad);
+ progress();
+ }, {
+ once: true
+ });
+ }
+ });
+ } else {
+ addListener(element, EVENT_CLICK, this.onStart = function (_ref) {
+ var target = _ref.target;
+ if (target.localName === 'img' && (!isFunction(options.filter) || options.filter.call(_this, target))) {
+ _this.view(_this.images.indexOf(target));
+ }
+ });
+ }
+ }
+ }, {
+ key: "build",
+ value: function build() {
+ if (this.ready) {
+ return;
+ }
+ var element = this.element,
+ options = this.options;
+ var parent = element.parentNode;
+ var template = document.createElement('div');
+ template.innerHTML = TEMPLATE;
+ var viewer = template.querySelector(".".concat(NAMESPACE, "-container"));
+ var title = viewer.querySelector(".".concat(NAMESPACE, "-title"));
+ var toolbar = viewer.querySelector(".".concat(NAMESPACE, "-toolbar"));
+ var navbar = viewer.querySelector(".".concat(NAMESPACE, "-navbar"));
+ var button = viewer.querySelector(".".concat(NAMESPACE, "-button"));
+ var canvas = viewer.querySelector(".".concat(NAMESPACE, "-canvas"));
+ this.parent = parent;
+ this.viewer = viewer;
+ this.title = title;
+ this.toolbar = toolbar;
+ this.navbar = navbar;
+ this.button = button;
+ this.canvas = canvas;
+ this.footer = viewer.querySelector(".".concat(NAMESPACE, "-footer"));
+ this.tooltipBox = viewer.querySelector(".".concat(NAMESPACE, "-tooltip"));
+ this.player = viewer.querySelector(".".concat(NAMESPACE, "-player"));
+ this.list = viewer.querySelector(".".concat(NAMESPACE, "-list"));
+ viewer.id = "".concat(NAMESPACE).concat(this.id);
+ title.id = "".concat(NAMESPACE, "Title").concat(this.id);
+ addClass(title, !options.title ? CLASS_HIDE : getResponsiveClass(Array.isArray(options.title) ? options.title[0] : options.title));
+ addClass(navbar, !options.navbar ? CLASS_HIDE : getResponsiveClass(options.navbar));
+ toggleClass(button, CLASS_HIDE, !options.button);
+ if (options.keyboard) {
+ button.setAttribute('tabindex', 0);
+ }
+ if (options.backdrop) {
+ addClass(viewer, "".concat(NAMESPACE, "-backdrop"));
+ if (!options.inline && options.backdrop !== 'static') {
+ setData(canvas, DATA_ACTION, 'hide');
+ }
+ }
+ if (isString(options.className) && options.className) {
+ // In case there are multiple class names
+ options.className.split(REGEXP_SPACES).forEach(function (className) {
+ addClass(viewer, className);
+ });
+ }
+ if (options.toolbar) {
+ var list = document.createElement('ul');
+ var custom = isPlainObject(options.toolbar);
+ var zoomButtons = BUTTONS.slice(0, 3);
+ var rotateButtons = BUTTONS.slice(7, 9);
+ var scaleButtons = BUTTONS.slice(9);
+ if (!custom) {
+ addClass(toolbar, getResponsiveClass(options.toolbar));
+ }
+ forEach(custom ? options.toolbar : BUTTONS, function (value, index) {
+ var deep = custom && isPlainObject(value);
+ var name = custom ? hyphenate(index) : value;
+ var show = deep && !isUndefined(value.show) ? value.show : value;
+ if (!show || !options.zoomable && zoomButtons.indexOf(name) !== -1 || !options.rotatable && rotateButtons.indexOf(name) !== -1 || !options.scalable && scaleButtons.indexOf(name) !== -1) {
+ return;
+ }
+ var size = deep && !isUndefined(value.size) ? value.size : value;
+ var click = deep && !isUndefined(value.click) ? value.click : value;
+ var item = document.createElement('li');
+ if (options.keyboard) {
+ item.setAttribute('tabindex', 0);
+ }
+ item.setAttribute('role', 'button');
+ addClass(item, "".concat(NAMESPACE, "-").concat(name));
+ if (!isFunction(click)) {
+ setData(item, DATA_ACTION, name);
+ }
+ if (isNumber(show)) {
+ addClass(item, getResponsiveClass(show));
+ }
+ if (['small', 'large'].indexOf(size) !== -1) {
+ addClass(item, "".concat(NAMESPACE, "-").concat(size));
+ } else if (name === 'play') {
+ addClass(item, "".concat(NAMESPACE, "-large"));
+ }
+ if (isFunction(click)) {
+ addListener(item, EVENT_CLICK, click);
+ }
+ list.appendChild(item);
+ });
+ toolbar.appendChild(list);
+ } else {
+ addClass(toolbar, CLASS_HIDE);
+ }
+ if (!options.rotatable) {
+ var rotates = toolbar.querySelectorAll('li[class*="rotate"]');
+ addClass(rotates, CLASS_INVISIBLE);
+ forEach(rotates, function (rotate) {
+ toolbar.appendChild(rotate);
+ });
+ }
+ if (options.inline) {
+ addClass(button, CLASS_FULLSCREEN);
+ setStyle(viewer, {
+ zIndex: options.zIndexInline
+ });
+ if (window.getComputedStyle(parent).position === 'static') {
+ setStyle(parent, {
+ position: 'relative'
+ });
+ }
+ parent.insertBefore(viewer, element.nextSibling);
+ } else {
+ addClass(button, CLASS_CLOSE);
+ addClass(viewer, CLASS_FIXED);
+ addClass(viewer, CLASS_FADE);
+ addClass(viewer, CLASS_HIDE);
+ setStyle(viewer, {
+ zIndex: options.zIndex
+ });
+ var container = options.container;
+ if (isString(container)) {
+ container = element.ownerDocument.querySelector(container);
+ }
+ if (!container) {
+ container = this.body;
+ }
+ container.appendChild(viewer);
+ }
+ if (options.inline) {
+ this.render();
+ this.bind();
+ this.isShown = true;
+ }
+ this.ready = true;
+ if (isFunction(options.ready)) {
+ addListener(element, EVENT_READY, options.ready, {
+ once: true
+ });
+ }
+ if (dispatchEvent(element, EVENT_READY) === false) {
+ this.ready = false;
+ return;
+ }
+ if (this.ready && options.inline) {
+ this.view(this.index);
+ }
+ }
+
+ /**
+ * Get the no conflict viewer class.
+ * @returns {Viewer} The viewer class.
+ */
+ }], [{
+ key: "noConflict",
+ value: function noConflict() {
+ window.Viewer = AnotherViewer;
+ return Viewer;
+ }
+
+ /**
+ * Change the default options.
+ * @param {Object} options - The new default options.
+ */
+ }, {
+ key: "setDefaults",
+ value: function setDefaults(options) {
+ assign(DEFAULTS, isPlainObject(options) && options);
+ }
+ }]);
+ return Viewer;
+ }();
+ assign(Viewer.prototype, render, events, handlers, methods, others);
+
+ return Viewer;
+
+}));
diff --git a/static/viewerjs/dist/viewer.min.css b/static/viewerjs/dist/viewer.min.css
new file mode 100644
index 0000000..1ef93f4
--- /dev/null
+++ b/static/viewerjs/dist/viewer.min.css
@@ -0,0 +1,9 @@
+/*!
+ * Viewer.js v1.11.2
+ * https://fengyuanchen.github.io/viewerjs
+ *
+ * Copyright 2015-present Chen Fengyuan
+ * Released under the MIT license
+ *
+ * Date: 2023-01-01T10:14:47.694Z
+ */.viewer-close:before,.viewer-flip-horizontal:before,.viewer-flip-vertical:before,.viewer-fullscreen-exit:before,.viewer-fullscreen:before,.viewer-next:before,.viewer-one-to-one:before,.viewer-play:before,.viewer-prev:before,.viewer-reset:before,.viewer-rotate-left:before,.viewer-rotate-right:before,.viewer-zoom-in:before,.viewer-zoom-out:before{background-image:url("data:image/png;base64,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");background-repeat:no-repeat;background-size:280px;color:transparent;display:block;font-size:0;height:20px;line-height:0;width:20px}.viewer-zoom-in:before{background-position:0 0;content:"Zoom In"}.viewer-zoom-out:before{background-position:-20px 0;content:"Zoom Out"}.viewer-one-to-one:before{background-position:-40px 0;content:"One to One"}.viewer-reset:before{background-position:-60px 0;content:"Reset"}.viewer-prev:before{background-position:-80px 0;content:"Previous"}.viewer-play:before{background-position:-100px 0;content:"Play"}.viewer-next:before{background-position:-120px 0;content:"Next"}.viewer-rotate-left:before{background-position:-140px 0;content:"Rotate Left"}.viewer-rotate-right:before{background-position:-160px 0;content:"Rotate Right"}.viewer-flip-horizontal:before{background-position:-180px 0;content:"Flip Horizontal"}.viewer-flip-vertical:before{background-position:-200px 0;content:"Flip Vertical"}.viewer-fullscreen:before{background-position:-220px 0;content:"Enter Full Screen"}.viewer-fullscreen-exit:before{background-position:-240px 0;content:"Exit Full Screen"}.viewer-close:before{background-position:-260px 0;content:"Close"}.viewer-container{-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;bottom:0;direction:ltr;font-size:0;left:0;line-height:0;overflow:hidden;position:absolute;right:0;top:0;-ms-touch-action:none;touch-action:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.viewer-container ::-moz-selection,.viewer-container::-moz-selection{background-color:transparent}.viewer-container ::selection,.viewer-container::selection{background-color:transparent}.viewer-container:focus{outline:0}.viewer-container img{display:block;height:auto;max-height:none!important;max-width:none!important;min-height:0!important;min-width:0!important;width:100%}.viewer-canvas{bottom:0;left:0;overflow:hidden;position:absolute;right:0;top:0}.viewer-canvas>img{height:auto;margin:15px auto;max-width:90%!important;width:auto}.viewer-footer{bottom:0;left:0;overflow:hidden;position:absolute;right:0;text-align:center}.viewer-navbar{background-color:rgba(0,0,0,.5);overflow:hidden}.viewer-list{box-sizing:content-box;height:50px;margin:0;overflow:hidden;padding:1px 0}.viewer-list>li{color:transparent;cursor:pointer;float:left;font-size:0;height:50px;line-height:0;opacity:.5;overflow:hidden;transition:opacity .15s;width:30px}.viewer-list>li:focus,.viewer-list>li:hover{opacity:.75}.viewer-list>li:focus{outline:0}.viewer-list>li+li{margin-left:1px}.viewer-list>.viewer-loading{position:relative}.viewer-list>.viewer-loading:after{border-width:2px;height:20px;margin-left:-10px;margin-top:-10px;width:20px}.viewer-list>.viewer-active,.viewer-list>.viewer-active:focus,.viewer-list>.viewer-active:hover{opacity:1}.viewer-player{background-color:#000;bottom:0;cursor:none;display:none;right:0;z-index:1}.viewer-player,.viewer-player>img{left:0;position:absolute;top:0}.viewer-toolbar>ul{display:inline-block;margin:0 auto 5px;overflow:hidden;padding:6px 3px}.viewer-toolbar>ul>li{background-color:rgba(0,0,0,.5);border-radius:50%;cursor:pointer;float:left;height:24px;overflow:hidden;transition:background-color .15s;width:24px}.viewer-toolbar>ul>li:focus,.viewer-toolbar>ul>li:hover{background-color:rgba(0,0,0,.8)}.viewer-toolbar>ul>li:focus{box-shadow:0 0 3px #fff;outline:0;position:relative;z-index:1}.viewer-toolbar>ul>li:before{margin:2px}.viewer-toolbar>ul>li+li{margin-left:1px}.viewer-toolbar>ul>.viewer-small{height:18px;margin-bottom:3px;margin-top:3px;width:18px}.viewer-toolbar>ul>.viewer-small:before{margin:-1px}.viewer-toolbar>ul>.viewer-large{height:30px;margin-bottom:-3px;margin-top:-3px;width:30px}.viewer-toolbar>ul>.viewer-large:before{margin:5px}.viewer-tooltip{background-color:rgba(0,0,0,.8);border-radius:10px;color:#fff;display:none;font-size:12px;height:20px;left:50%;line-height:20px;margin-left:-25px;margin-top:-10px;position:absolute;text-align:center;top:50%;width:50px}.viewer-title{color:#ccc;display:inline-block;font-size:12px;line-height:1.2;margin:5px 5%;max-width:90%;min-height:14px;opacity:.8;overflow:hidden;text-overflow:ellipsis;transition:opacity .15s;white-space:nowrap}.viewer-title:hover{opacity:1}.viewer-button{-webkit-app-region:no-drag;background-color:rgba(0,0,0,.5);border-radius:50%;cursor:pointer;height:80px;overflow:hidden;position:absolute;right:-40px;top:-40px;transition:background-color .15s;width:80px}.viewer-button:focus,.viewer-button:hover{background-color:rgba(0,0,0,.8)}.viewer-button:focus{box-shadow:0 0 3px #fff;outline:0}.viewer-button:before{bottom:15px;left:15px;position:absolute}.viewer-fixed{position:fixed}.viewer-open{overflow:hidden}.viewer-show{display:block}.viewer-hide{display:none}.viewer-backdrop{background-color:rgba(0,0,0,.5)}.viewer-invisible{visibility:hidden}.viewer-move{cursor:move;cursor:grab}.viewer-fade{opacity:0}.viewer-in{opacity:1}.viewer-transition{transition:all .3s}@keyframes viewer-spinner{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.viewer-loading:after{animation:viewer-spinner 1s linear infinite;border:4px solid hsla(0,0%,100%,.1);border-left-color:hsla(0,0%,100%,.5);border-radius:50%;content:"";display:inline-block;height:40px;left:50%;margin-left:-20px;margin-top:-20px;position:absolute;top:50%;width:40px;z-index:1}@media (max-width:767px){.viewer-hide-xs-down{display:none}}@media (max-width:991px){.viewer-hide-sm-down{display:none}}@media (max-width:1199px){.viewer-hide-md-down{display:none}} \ No newline at end of file
diff --git a/static/viewerjs/dist/viewer.min.js b/static/viewerjs/dist/viewer.min.js
new file mode 100644
index 0000000..307ba08
--- /dev/null
+++ b/static/viewerjs/dist/viewer.min.js
@@ -0,0 +1,10 @@
+/*!
+ * Viewer.js v1.11.2
+ * https://fengyuanchen.github.io/viewerjs
+ *
+ * Copyright 2015-present Chen Fengyuan
+ * Released under the MIT license
+ *
+ * Date: 2023-01-01T10:14:49.638Z
+ */
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).Viewer=e()}(this,function(){"use strict";function s(e,t){var i,n=Object.keys(e);return Object.getOwnPropertySymbols&&(i=Object.getOwnPropertySymbols(e),t&&(i=i.filter(function(t){return Object.getOwnPropertyDescriptor(e,t).enumerable})),n.push.apply(n,i)),n}function q(n){for(var t=1;t<arguments.length;t++){var o=null!=arguments[t]?arguments[t]:{};t%2?s(Object(o),!0).forEach(function(t){var e,i;e=n,i=o[t=t],(t=l(t))in e?Object.defineProperty(e,t,{value:i,enumerable:!0,configurable:!0,writable:!0}):e[t]=i}):Object.getOwnPropertyDescriptors?Object.defineProperties(n,Object.getOwnPropertyDescriptors(o)):s(Object(o)).forEach(function(t){Object.defineProperty(n,t,Object.getOwnPropertyDescriptor(o,t))})}return n}function n(t){return(n="function"==typeof Symbol&&"symbol"==typeof 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