/*!
* viewer.js v1.10.4
* https://fengyuanchen.github.io/viewerjs
*
* copyright 2015-present chen fengyuan
* released under the mit license
*
* date: 2022-02-13t08:40:00.127z
*/
(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 = '
' + '
' + '' + '
' + '
' + '
' + '
';
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, '>') : 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) // avoid conflicts with other modals (#474)
&& (target.getattribute('tabindex') === null || target.getattribute('aria-modal') !== 'true')) {
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);
}
});
}
};
foreach(images, function (image) {
if (image.complete) {
progress();
} else {
addlistener(image, event_load, 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;
}));