viewer
此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.greasyfork.org/scripts/446062/1058082/viewerjs.js
/*!
* Viewer.js v1.10.5
* https://fengyuanchen.github.io/viewerjs
*
* Copyright 2015-present Chen Fengyuan
* Released under the MIT license
*
* Date: 2022-04-05T08:21:02.491Z
*/
(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, 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) {
if (key in obj) {
Object.defineProperty(obj, key, {
value: value,
enumerable: true,
configurable: true,
writable: true
});
} else {
obj[key] = value;
}
return obj;
}
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 index of 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, '&').replace(/"/g, '"').replace(/'/g, ''').replace(/</g, '<').replace(/>/g, '>') : 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);
}
});
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 width = viewerWidth;
var height = viewerHeight;
_this2.imageInitializing = false;
if (viewerHeight * aspectRatio > viewerWidth) {
height = viewerWidth / aspectRatio;
} else {
width = viewerHeight * aspectRatio;
}
width = Math.min(width * 0.9, naturalWidth);
height = Math.min(height * 0.9, 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':
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:
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:
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;
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();
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, 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, 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} [hasTooltip=false] - Indicates if it has a tooltip or not.
* @param {Event} [_originalEvent=null] - The original event if any.
* @returns {Viewer} this
*/
zoom: function zoom(ratio) {
var hasTooltip = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
var _originalEvent = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 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, hasTooltip, _originalEvent);
return this;
},
/**
* Zoom the image to an absolute ratio.
* @param {number} ratio - The target ratio.
* @param {boolean} [hasTooltip=false] - Indicates if it has a tooltip or not.
* @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 hasTooltip = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
var _originalEvent = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
var _zoomable = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 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 {
// 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 (hasTooltip) {
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 play = function play() {
_this7.playing = setTimeout(function () {
removeClass(list[index], CLASS_IN);
index += 1;
index = index < total ? index : 0;
addClass(list[index], CLASS_IN);
play();
}, options.interval);
};
if (total > 1) {
play();
}
}
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;
this.played = false;
clearTimeout(this.playing);
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, _originalEvent);
} else {
this.zoomTo(1, true, _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);
body.style.paddingRight = "".concat(this.scrollbarWidth + (parseFloat(this.initialBodyComputedPaddingRight) || 0), "px");
},
close: function close() {
var body = this.body;
removeClass(body, CLASS_OPEN);
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, 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.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;
}));