viewerjs-optimize
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JavaScript image viewer-optimize.
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JavaScript
/*!
* ViewerOptimize.js v1.3.21
* https://github.com/ThinkDuan/viewerjs-optimize
*
* Copyright 2022 ThinkDuan
* Released under the MIT license
*
* Date: 2022-06-20T12:39:55.833Z
*/
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = global || self, global.ViewerOptimize = factory());
}(this, (function () { 'use strict';
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;
}
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.
* @type {boolean}
*/
fullscreen: true,
/**
* 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,
/**
* 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 zoom the image.
* @type {boolean}
*/
zoomable: true,
/**
* Enable to rotate the image.
* @type {boolean}
*/
rotatable: true,
/**
* Enable to scale the image.
* @type {boolean}
*/
scalable: 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,
zoom: null,
zoomed: null
};
var TEMPLATE = '<div class="viewer-container" touch-action="none">' + '<div class="viewer-container-box">' + '<div class="viewer-canvas" id="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"></ul>' + '</div>' + '</div>' + '<div class="viewer-tooltip"></div>' + '<div class="viewer-button-box" title="按住鼠标鼠标左键可拖动">' + '<div role="button" class="viewer-button" data-viewer-action="mix"></div>' + '</div>' + '<div class="viewer-player"></div>' + '</div>' + '</div>';
var IS_BROWSER = typeof window !== 'undefined';
var WINDOW = IS_BROWSER ? window : {};
var IS_TOUCH_DEVICE = IS_BROWSER ? '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"); // Events
var EVENT_CLICK = 'click';
var EVENT_DBLCLICK = 'dblclick';
var EVENT_DRAG_START = 'dragstart';
var EVENT_HIDDEN = 'hidden';
var EVENT_HIDE = 'hide';
var EVENT_KEY_DOWN = 'keydown';
var EVENT_LOAD = 'load';
var EVENT_TOUCH_START = IS_TOUCH_DEVICE ? 'touchstart' : 'mousedown';
var EVENT_TOUCH_MOVE = IS_TOUCH_DEVICE ? 'touchmove' : 'mousemove';
var EVENT_TOUCH_END = IS_TOUCH_DEVICE ? 'touchend touchcancel' : 'mouseup';
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_READY = 'ready';
var EVENT_RESIZE = 'resize';
var EVENT_SHOW = 'show';
var EVENT_SHOWN = 'shown';
var EVENT_TRANSITION_END = 'transitionend';
var EVENT_VIEW = 'view';
var EVENT_VIEWED = 'viewed';
var EVENT_WHEEL = 'wheel';
var EVENT_ZOOM = 'zoom';
var EVENT_ZOOMED = 'zoomed'; // 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(/&/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) {
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 (!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 (!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.
* @returns {boolean} Indicate if the event is default prevented or not.
*/
function dispatchEvent(element, type, data) {
var event; // Event and CustomEvent on IE9-11 are global objects, not constructors
if (isFunction(Event) && isFunction(CustomEvent)) {
event = new CustomEvent(type, {
detail: data,
bubbles: true,
cancelable: true
});
} 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('http://domain.com/path/to/picture.jpg?size=1280×960')
* @returns {string} A string contains the image name.
*/
function getImageNameFromURL(url) {
return isString(url) ? 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 {Function} callback - The callback function.
* @returns {HTMLImageElement} The new image.
*/
function getImageNaturalSizes(image, 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);
}
};
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 = assign({}, 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 : assign({
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();
},
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;
}
var containerBox = document.querySelector('#viewer-canvas');
viewerData = {
width: Math.max(containerBox.offsetWidth, options.minWidth),
height: Math.max(containerBox.offsetHeight, options.minHeight)
}; // eslint-disable-next-line prefer-template
var elementClassName = '.' + options.className.split(' ')[1];
var div1 = document.querySelector(elementClassName);
div1.onmousedown = function mouseDownFunction(ev) {
var oevent = ev || window.event;
var distanceX = oevent.clientX - div1.offsetLeft;
var distanceY = oevent.clientY - div1.offsetTop;
document.onmousemove = function mouseMoveFunction(evs) {
var oevents = evs || window.event;
div1.style.left = "".concat(oevents.clientX - distanceX, "px");
div1.style.top = "".concat(oevents.clientY - distanceY, "px");
};
document.onmouseup = function mouseUpFunction() {
document.onmousemove = null;
document.onmouseup = null;
};
}; // 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 = [];
forEach(this.images, function (image, i) {
var src = escapeHTMLEntities(image.src);
var alt = escapeHTMLEntities(image.alt || getImageNameFromURL(src));
var url = options.url;
if (isString(url)) {
url = escapeHTMLEntities(image.getAttribute(url));
} else if (isFunction(url)) {
url = escapeHTMLEntities(url.call(_this, image));
}
if (src || url) {
items.push('<li>' + '<img' + " src=\"".concat(src || url, "\"") + ' role="button"' + ' data-viewer-action="view"' + " data-index=\"".concat(i, "\"") + " data-original-url=\"".concat(url || src, "\"") + " alt=\"".concat(alt, "\"") + '>' + '</li>');
}
});
list.innerHTML = items.join('');
this.items = list.getElementsByTagName('li');
forEach(this.items, function (item) {
var image = item.firstElementChild;
setData(image, 'filled', true);
if (options.loading) {
addClass(item, CLASS_LOADING);
}
addListener(image, EVENT_LOAD, function (event) {
if (options.loading) {
removeClass(item, CLASS_LOADING);
}
_this.loadImage(event);
}, {
once: true
});
});
if (options.transition) {
addListener(element, EVENT_VIEWED, function () {
addClass(list, CLASS_TRANSITION);
}, {
once: true
});
}
},
renderList: function renderList(index) {
var i = index || this.index;
var width = this.items[i].offsetWidth || 30;
var outerWidth = width + 1; // 1 pixel of `margin-left` width
// Place the active item in the center of the screen
setStyle(this.list, assign({
width: outerWidth * this.length
}, getTransforms({
translateX: 0 // translateX: ((this.viewerData.width - width) / 2) - (outerWidth * i),
})));
},
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, 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 imageData = {
naturalWidth: naturalWidth,
naturalHeight: naturalHeight,
aspectRatio: aspectRatio,
ratio: width / naturalWidth,
width: width,
height: height,
left: (viewerWidth - width) / 2,
top: (viewerHeight - height) / 2
};
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.left,
marginTop: imageData.top
}, getTransforms(imageData)));
if (done) {
if ((this.viewing || this.zooming) && this.options.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_WHEEL, this.onWheel = this.wheel.bind(this), {
passive: false,
capture: true
});
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.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_WHEEL, this.onWheel, {
passive: false,
capture: true
});
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.toggleOnDblclick) {
removeListener(canvas, EVENT_DBLCLICK, this.onDblclick);
}
}
};
var handlers = {
click: function click(event) {
var target = event.target;
var options = this.options,
imageData = this.imageData;
var 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);
}
this.toggle();
}
},
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:absolute;' + '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
});
});
});
},
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, 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 (!this.fulled || !options.keyboard) {
return;
}
switch (event.keyCode || event.which || event.charCode) {
// 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.tagName.toLowerCase() === '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 // No primary button (Usually the left button)
// Note that touch events have no `buttons` or `button` property
|| 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 (Object.keys(pointers).length > 1) {
action = ACTION_ZOOM;
} else if ((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);
}, 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);
}, 50);
}
}
}
},
resize: function resize() {
var _this3 = this;
if (!this.isShown || this.hiding) {
return;
}
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);
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
// eslint-disable-next-line
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 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
});