1819 lines
50 KiB
JavaScript
1819 lines
50 KiB
JavaScript
/*!
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* PhotoSwipe Lightbox 5.3.2 - https://photoswipe.com
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* (c) 2022 Dmytro Semenov
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*/
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/** @typedef {import('../photoswipe.js').Point} Point */
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/** @typedef {undefined | null | false | '' | 0} Falsy */
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/** @typedef {keyof HTMLElementTagNameMap} HTMLElementTagName */
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/**
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* @template {HTMLElementTagName | Falsy} [T="div"]
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* @template {Node | undefined} [NodeToAppendElementTo=undefined]
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* @param {string=} className
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* @param {T=} [tagName]
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* @param {NodeToAppendElementTo=} appendToEl
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* @returns {T extends HTMLElementTagName ? HTMLElementTagNameMap[T] : HTMLElementTagNameMap['div']}
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*/
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function createElement(className, tagName, appendToEl) {
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const el = document.createElement(tagName || 'div');
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if (className) {
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el.className = className;
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}
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if (appendToEl) {
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appendToEl.appendChild(el);
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}
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// @ts-expect-error
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return el;
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}
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/**
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* Get transform string
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*
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* @param {number} x
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* @param {number=} y
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* @param {number=} scale
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*/
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function toTransformString(x, y, scale) {
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let propValue = 'translate3d('
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+ x + 'px,' + (y || 0) + 'px'
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+ ',0)';
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if (scale !== undefined) {
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propValue += ' scale3d('
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+ scale + ',' + scale
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+ ',1)';
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}
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return propValue;
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}
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/**
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* Apply width and height CSS properties to element
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*
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* @param {HTMLElement} el
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* @param {string | number} w
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* @param {string | number} h
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*/
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function setWidthHeight(el, w, h) {
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el.style.width = (typeof w === 'number') ? (w + 'px') : w;
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el.style.height = (typeof h === 'number') ? (h + 'px') : h;
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}
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/** @typedef {LOAD_STATE[keyof LOAD_STATE]} LoadState */
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/** @type {{ IDLE: 'idle'; LOADING: 'loading'; LOADED: 'loaded'; ERROR: 'error' }} */
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const LOAD_STATE = {
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IDLE: 'idle',
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LOADING: 'loading',
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LOADED: 'loaded',
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ERROR: 'error',
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};
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/**
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* Check if click or keydown event was dispatched
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* with a special key or via mouse wheel.
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*
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* @param {MouseEvent | KeyboardEvent} e
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*/
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function specialKeyUsed(e) {
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if (e.which === 2 || e.ctrlKey || e.metaKey || e.altKey || e.shiftKey) {
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return true;
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}
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}
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/**
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* Parse `gallery` or `children` options.
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*
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* @param {HTMLElement | NodeListOf<HTMLElement> | string} option
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* @param {string=} legacySelector
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* @param {HTMLElement | Document} [parent]
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* @returns HTMLElement[]
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*/
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function getElementsFromOption(option, legacySelector, parent = document) {
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/** @type {HTMLElement[]} */
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let elements = [];
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if (option instanceof Element) {
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elements = [option];
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} else if (option instanceof NodeList || Array.isArray(option)) {
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elements = Array.from(option);
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} else {
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const selector = typeof option === 'string' ? option : legacySelector;
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if (selector) {
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elements = Array.from(parent.querySelectorAll(selector));
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}
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}
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return elements;
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}
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/**
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* Check if variable is PhotoSwipe class
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*
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* @param {any} fn
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*/
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function isPswpClass(fn) {
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return typeof fn === 'function'
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&& fn.prototype
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&& fn.prototype.goTo;
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}
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/**
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* Check if browser is Safari
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*
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* @returns {boolean}
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*/
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function isSafari() {
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return !!(navigator.vendor && navigator.vendor.match(/apple/i));
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}
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/** @typedef {import('../lightbox/lightbox.js').default} PhotoSwipeLightbox */
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/** @typedef {import('../photoswipe.js').default} PhotoSwipe */
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/** @typedef {import('../photoswipe.js').PhotoSwipeOptions} PhotoSwipeOptions */
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/** @typedef {import('../photoswipe.js').DataSource} DataSource */
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/** @typedef {import('../ui/ui-element.js').UIElementData} UIElementData */
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/** @typedef {import('../slide/content.js').default} ContentDefault */
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/** @typedef {import('../slide/slide.js').default} Slide */
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/** @typedef {import('../slide/slide.js').SlideData} SlideData */
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/** @typedef {import('../slide/zoom-level.js').default} ZoomLevel */
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/** @typedef {import('../slide/get-thumb-bounds.js').Bounds} Bounds */
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/**
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* Allow adding an arbitrary props to the Content
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* https://photoswipe.com/custom-content/#using-webp-image-format
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* @typedef {ContentDefault & Record<string, any>} Content
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*/
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/** @typedef {{ x?: number; y?: number }} Point */
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/**
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* @typedef {Object} PhotoSwipeEventsMap https://photoswipe.com/events/
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*
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*
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* https://photoswipe.com/adding-ui-elements/
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*
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* @prop {undefined} uiRegister
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* @prop {{ data: UIElementData }} uiElementCreate
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*
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*
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* https://photoswipe.com/events/#initialization-events
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*
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* @prop {undefined} beforeOpen
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* @prop {undefined} firstUpdate
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* @prop {undefined} initialLayout
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* @prop {undefined} change
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* @prop {undefined} afterInit
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* @prop {undefined} bindEvents
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*
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*
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* https://photoswipe.com/events/#opening-or-closing-transition-events
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*
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* @prop {undefined} openingAnimationStart
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* @prop {undefined} openingAnimationEnd
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* @prop {undefined} closingAnimationStart
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* @prop {undefined} closingAnimationEnd
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*
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*
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* https://photoswipe.com/events/#closing-events
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*
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* @prop {undefined} close
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* @prop {undefined} destroy
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*
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*
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* https://photoswipe.com/events/#pointer-and-gesture-events
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*
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* @prop {{ originalEvent: PointerEvent }} pointerDown
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* @prop {{ originalEvent: PointerEvent }} pointerMove
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* @prop {{ originalEvent: PointerEvent }} pointerUp
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* @prop {{ bgOpacity: number }} pinchClose can be default prevented
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* @prop {{ panY: number }} verticalDrag can be default prevented
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*
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*
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* https://photoswipe.com/events/#slide-content-events
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*
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* @prop {{ content: Content }} contentInit
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* @prop {{ content: Content; isLazy: boolean }} contentLoad can be default prevented
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* @prop {{ content: Content; isLazy: boolean }} contentLoadImage can be default prevented
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* @prop {{ content: Content; slide: Slide; isError?: boolean }} loadComplete
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* @prop {{ content: Content; slide: Slide }} loadError
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* @prop {{ content: Content; width: number; height: number }} contentResize can be default prevented
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* @prop {{ content: Content; width: number; height: number; slide: Slide }} imageSizeChange
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* @prop {{ content: Content }} contentLazyLoad can be default prevented
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* @prop {{ content: Content }} contentAppend can be default prevented
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* @prop {{ content: Content }} contentActivate can be default prevented
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* @prop {{ content: Content }} contentDeactivate can be default prevented
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* @prop {{ content: Content }} contentRemove can be default prevented
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* @prop {{ content: Content }} contentDestroy can be default prevented
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*
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*
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* undocumented
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*
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* @prop {{ point: Point; originalEvent: PointerEvent }} imageClickAction can be default prevented
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* @prop {{ point: Point; originalEvent: PointerEvent }} bgClickAction can be default prevented
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* @prop {{ point: Point; originalEvent: PointerEvent }} tapAction can be default prevented
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* @prop {{ point: Point; originalEvent: PointerEvent }} doubleTapAction can be default prevented
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*
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* @prop {{ originalEvent: KeyboardEvent }} keydown can be default prevented
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* @prop {{ x: number; dragging: boolean }} moveMainScroll
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* @prop {{ slide: Slide }} firstZoomPan
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* @prop {{ slide: Slide, data: SlideData, index: number }} gettingData
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* @prop {undefined} beforeResize
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* @prop {undefined} resize
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* @prop {undefined} viewportSize
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* @prop {undefined} updateScrollOffset
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* @prop {{ slide: Slide }} slideInit
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* @prop {{ slide: Slide }} afterSetContent
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* @prop {{ slide: Slide }} slideLoad
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* @prop {{ slide: Slide }} appendHeavy can be default prevented
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* @prop {{ slide: Slide }} appendHeavyContent
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* @prop {{ slide: Slide }} slideActivate
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* @prop {{ slide: Slide }} slideDeactivate
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* @prop {{ slide: Slide }} slideDestroy
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* @prop {{ destZoomLevel: number, centerPoint: Point, transitionDuration: number | false }} beforeZoomTo
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* @prop {{ slide: Slide }} zoomPanUpdate
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* @prop {{ slide: Slide }} initialZoomPan
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* @prop {{ slide: Slide }} calcSlideSize
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* @prop {undefined} resolutionChanged
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* @prop {{ originalEvent: WheelEvent }} wheel can be default prevented
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* @prop {{ content: Content }} contentAppendImage can be default prevented
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* @prop {{ index: number; itemData: SlideData }} lazyLoadSlide can be default prevented
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* @prop {undefined} lazyLoad
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* @prop {{ slide: Slide }} calcBounds
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* @prop {{ zoomLevels: ZoomLevel, slideData: SlideData }} zoomLevelsUpdate
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*
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*
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* legacy
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*
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* @prop {undefined} init
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* @prop {undefined} initialZoomIn
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* @prop {undefined} initialZoomOut
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* @prop {undefined} initialZoomInEnd
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* @prop {undefined} initialZoomOutEnd
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* @prop {{ dataSource: DataSource, numItems: number }} numItems
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* @prop {{ itemData: SlideData; index: number }} itemData
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* @prop {{ index: number, itemData: SlideData, instance: PhotoSwipe }} thumbBounds
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*/
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/**
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* @typedef {Object} PhotoSwipeFiltersMap https://photoswipe.com/filters/
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*
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* @prop {(numItems: number, dataSource: DataSource) => number} numItems
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* Modify the total amount of slides. Example on Data sources page.
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* https://photoswipe.com/filters/#numitems
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*
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* @prop {(itemData: SlideData, index: number) => SlideData} itemData
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* Modify slide item data. Example on Data sources page.
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* https://photoswipe.com/filters/#itemdata
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*
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* @prop {(itemData: SlideData, element: HTMLElement, linkEl: HTMLAnchorElement) => SlideData} domItemData
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* Modify item data when it's parsed from DOM element. Example on Data sources page.
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* https://photoswipe.com/filters/#domitemdata
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*
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* @prop {(clickedIndex: number, e: MouseEvent, instance: PhotoSwipeLightbox) => number} clickedIndex
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* Modify clicked gallery item index.
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* https://photoswipe.com/filters/#clickedindex
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*
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* @prop {(placeholderSrc: string | false, content: Content) => string | false} placeholderSrc
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* Modify placeholder image source.
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* https://photoswipe.com/filters/#placeholdersrc
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*
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* @prop {(isContentLoading: boolean, content: Content) => boolean} isContentLoading
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* Modify if the content is currently loading.
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* https://photoswipe.com/filters/#iscontentloading
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*
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* @prop {(isContentZoomable: boolean, content: Content) => boolean} isContentZoomable
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* Modify if the content can be zoomed.
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* https://photoswipe.com/filters/#iscontentzoomable
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*
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* @prop {(useContentPlaceholder: boolean, content: Content) => boolean} useContentPlaceholder
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* Modify if the placeholder should be used for the content.
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* https://photoswipe.com/filters/#usecontentplaceholder
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*
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* @prop {(isKeepingPlaceholder: boolean, content: Content) => boolean} isKeepingPlaceholder
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* Modify if the placeholder should be kept after the content is loaded.
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* https://photoswipe.com/filters/#iskeepingplaceholder
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*
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*
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* @prop {(contentErrorElement: HTMLElement, content: Content) => HTMLElement} contentErrorElement
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* Modify an element when the content has error state (for example, if image cannot be loaded).
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* https://photoswipe.com/filters/#contenterrorelement
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*
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* @prop {(element: HTMLElement, data: UIElementData) => HTMLElement} uiElement
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* Modify a UI element that's being created.
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* https://photoswipe.com/filters/#uielement
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*
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* @prop {(thumbnail: HTMLElement, itemData: SlideData, index: number) => HTMLElement} thumbEl
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* Modify the thubmnail element from which opening zoom animation starts or ends.
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* https://photoswipe.com/filters/#thumbel
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*
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* @prop {(thumbBounds: Bounds, itemData: SlideData, index: number) => Bounds} thumbBounds
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* Modify the thubmnail bounds from which opening zoom animation starts or ends.
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* https://photoswipe.com/filters/#thumbbounds
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*
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* @prop {(srcsetSizesWidth: number, content: Content) => number} srcsetSizesWidth
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*
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*/
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/**
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* @template {keyof PhotoSwipeFiltersMap} T
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* @typedef {{ fn: PhotoSwipeFiltersMap[T], priority: number }} Filter<T>
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*/
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/**
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* @template {keyof PhotoSwipeEventsMap} T
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* @typedef {PhotoSwipeEventsMap[T] extends undefined ? PhotoSwipeEvent<T> : PhotoSwipeEvent<T> & PhotoSwipeEventsMap[T]} AugmentedEvent
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*/
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/**
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* @template {keyof PhotoSwipeEventsMap} T
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* @typedef {(event: AugmentedEvent<T>) => void} EventCallback<T>
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*/
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/**
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* Base PhotoSwipe event object
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*
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* @template {keyof PhotoSwipeEventsMap} T
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*/
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class PhotoSwipeEvent {
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/**
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* @param {T} type
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* @param {PhotoSwipeEventsMap[T]} [details]
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*/
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constructor(type, details) {
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this.type = type;
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if (details) {
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Object.assign(this, details);
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}
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}
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preventDefault() {
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this.defaultPrevented = true;
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}
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}
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/**
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* PhotoSwipe base class that can listen and dispatch for events.
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* Shared by PhotoSwipe Core and PhotoSwipe Lightbox, extended by base.js
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*/
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class Eventable {
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constructor() {
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/**
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* @type {{ [T in keyof PhotoSwipeEventsMap]?: ((event: AugmentedEvent<T>) => void)[] }}
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*/
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this._listeners = {};
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/**
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* @type {{ [T in keyof PhotoSwipeFiltersMap]?: Filter<T>[] }}
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*/
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this._filters = {};
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/** @type {PhotoSwipe=} */
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this.pswp = undefined;
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/** @type {PhotoSwipeOptions} */
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this.options = undefined;
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}
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/**
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* @template {keyof PhotoSwipeFiltersMap} T
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* @param {T} name
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* @param {PhotoSwipeFiltersMap[T]} fn
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* @param {number} priority
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*/
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addFilter(name, fn, priority = 100) {
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if (!this._filters[name]) {
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this._filters[name] = [];
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}
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this._filters[name].push({ fn, priority });
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this._filters[name].sort((f1, f2) => f1.priority - f2.priority);
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if (this.pswp) {
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this.pswp.addFilter(name, fn, priority);
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}
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}
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/**
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* @template {keyof PhotoSwipeFiltersMap} T
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* @param {T} name
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* @param {PhotoSwipeFiltersMap[T]} fn
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*/
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removeFilter(name, fn) {
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if (this._filters[name]) {
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// @ts-expect-error
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this._filters[name] = this._filters[name].filter(filter => (filter.fn !== fn));
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}
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if (this.pswp) {
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this.pswp.removeFilter(name, fn);
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}
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}
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/**
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* @template {keyof PhotoSwipeFiltersMap} T
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* @param {T} name
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* @param {Parameters<PhotoSwipeFiltersMap[T]>} args
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* @returns {Parameters<PhotoSwipeFiltersMap[T]>[0]}
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*/
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applyFilters(name, ...args) {
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if (this._filters[name]) {
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this._filters[name].forEach((filter) => {
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// @ts-expect-error
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args[0] = filter.fn.apply(this, args);
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});
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}
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return args[0];
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}
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/**
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* @template {keyof PhotoSwipeEventsMap} T
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* @param {T} name
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* @param {EventCallback<T>} fn
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*/
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on(name, fn) {
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if (!this._listeners[name]) {
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this._listeners[name] = [];
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}
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this._listeners[name].push(fn);
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// When binding events to lightbox,
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// also bind events to PhotoSwipe Core,
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// if it's open.
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if (this.pswp) {
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this.pswp.on(name, fn);
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}
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}
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|
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/**
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* @template {keyof PhotoSwipeEventsMap} T
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* @param {T} name
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* @param {EventCallback<T>} fn
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*/
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off(name, fn) {
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if (this._listeners[name]) {
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// @ts-expect-error
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this._listeners[name] = this._listeners[name].filter(listener => (fn !== listener));
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}
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if (this.pswp) {
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this.pswp.off(name, fn);
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}
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}
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/**
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* @template {keyof PhotoSwipeEventsMap} T
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* @param {T} name
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* @param {PhotoSwipeEventsMap[T]} [details]
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* @returns {AugmentedEvent<T>}
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*/
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dispatch(name, details) {
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if (this.pswp) {
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return this.pswp.dispatch(name, details);
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}
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const event = /** @type {AugmentedEvent<T>} */ (new PhotoSwipeEvent(name, details));
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if (!this._listeners) {
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return event;
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}
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if (this._listeners[name]) {
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this._listeners[name].forEach((listener) => {
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listener.call(this, event);
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});
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}
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return event;
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}
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}
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class Placeholder {
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/**
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* @param {string | false} imageSrc
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* @param {HTMLElement} container
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*/
|
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constructor(imageSrc, container) {
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// Create placeholder
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// (stretched thumbnail or simple div behind the main image)
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this.element = createElement(
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'pswp__img pswp__img--placeholder',
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imageSrc ? 'img' : '',
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container
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);
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if (imageSrc) {
|
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/** @type {HTMLImageElement} */
|
|
(this.element).decoding = 'async';
|
|
/** @type {HTMLImageElement} */
|
|
(this.element).alt = '';
|
|
/** @type {HTMLImageElement} */
|
|
(this.element).src = imageSrc;
|
|
this.element.setAttribute('role', 'presentation');
|
|
}
|
|
|
|
this.element.setAttribute('aria-hiden', 'true');
|
|
}
|
|
|
|
/**
|
|
* @param {number} width
|
|
* @param {number} height
|
|
*/
|
|
setDisplayedSize(width, height) {
|
|
if (!this.element) {
|
|
return;
|
|
}
|
|
|
|
if (this.element.tagName === 'IMG') {
|
|
// Use transform scale() to modify img placeholder size
|
|
// (instead of changing width/height directly).
|
|
// This helps with performance, specifically in iOS15 Safari.
|
|
setWidthHeight(this.element, 250, 'auto');
|
|
this.element.style.transformOrigin = '0 0';
|
|
this.element.style.transform = toTransformString(0, 0, width / 250);
|
|
} else {
|
|
setWidthHeight(this.element, width, height);
|
|
}
|
|
}
|
|
|
|
destroy() {
|
|
if (this.element.parentNode) {
|
|
this.element.remove();
|
|
}
|
|
this.element = null;
|
|
}
|
|
}
|
|
|
|
/** @typedef {import('./slide.js').default} Slide */
|
|
/** @typedef {import('./slide.js').SlideData} SlideData */
|
|
/** @typedef {import('../photoswipe.js').default} PhotoSwipe */
|
|
/** @typedef {import('../util/util.js').LoadState} LoadState */
|
|
|
|
class Content {
|
|
/**
|
|
* @param {SlideData} itemData Slide data
|
|
* @param {PhotoSwipe} instance PhotoSwipe or PhotoSwipeLightbox instance
|
|
* @param {number} index
|
|
*/
|
|
constructor(itemData, instance, index) {
|
|
this.instance = instance;
|
|
this.data = itemData;
|
|
this.index = index;
|
|
|
|
/** @type {HTMLImageElement | HTMLDivElement} */
|
|
this.element = undefined;
|
|
|
|
this.displayedImageWidth = 0;
|
|
this.displayedImageHeight = 0;
|
|
|
|
this.width = Number(this.data.w) || Number(this.data.width) || 0;
|
|
this.height = Number(this.data.h) || Number(this.data.height) || 0;
|
|
|
|
this.isAttached = false;
|
|
this.hasSlide = false;
|
|
/** @type {LoadState} */
|
|
this.state = LOAD_STATE.IDLE;
|
|
|
|
if (this.data.type) {
|
|
this.type = this.data.type;
|
|
} else if (this.data.src) {
|
|
this.type = 'image';
|
|
} else {
|
|
this.type = 'html';
|
|
}
|
|
|
|
this.instance.dispatch('contentInit', { content: this });
|
|
}
|
|
|
|
removePlaceholder() {
|
|
if (this.placeholder && !this.keepPlaceholder()) {
|
|
// With delay, as image might be loaded, but not rendered
|
|
setTimeout(() => {
|
|
if (this.placeholder) {
|
|
this.placeholder.destroy();
|
|
this.placeholder = null;
|
|
}
|
|
}, 1000);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Preload content
|
|
*
|
|
* @param {boolean=} isLazy
|
|
* @param {boolean=} reload
|
|
*/
|
|
load(isLazy, reload) {
|
|
if (this.slide && this.usePlaceholder()) {
|
|
if (!this.placeholder) {
|
|
const placeholderSrc = this.instance.applyFilters(
|
|
'placeholderSrc',
|
|
// use image-based placeholder only for the first slide,
|
|
// as rendering (even small stretched thumbnail) is an expensive operation
|
|
(this.data.msrc && this.slide.isFirstSlide) ? this.data.msrc : false,
|
|
this
|
|
);
|
|
this.placeholder = new Placeholder(
|
|
placeholderSrc,
|
|
this.slide.container
|
|
);
|
|
} else {
|
|
const placeholderEl = this.placeholder.element;
|
|
// Add placeholder to DOM if it was already created
|
|
if (placeholderEl && !placeholderEl.parentElement) {
|
|
this.slide.container.prepend(placeholderEl);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (this.element && !reload) {
|
|
return;
|
|
}
|
|
|
|
if (this.instance.dispatch('contentLoad', { content: this, isLazy }).defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
if (this.isImageContent()) {
|
|
this.element = createElement('pswp__img', 'img');
|
|
// Start loading only after width is defined, as sizes might depend on it.
|
|
// Due to Safari feature, we must define sizes before srcset.
|
|
if (this.displayedImageWidth) {
|
|
this.loadImage(isLazy);
|
|
}
|
|
} else {
|
|
this.element = createElement('pswp__content');
|
|
this.element.innerHTML = this.data.html || '';
|
|
}
|
|
|
|
if (reload && this.slide) {
|
|
this.slide.updateContentSize(true);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Preload image
|
|
*
|
|
* @param {boolean} isLazy
|
|
*/
|
|
loadImage(isLazy) {
|
|
const imageElement = /** @type HTMLImageElement */ (this.element);
|
|
|
|
if (this.instance.dispatch('contentLoadImage', { content: this, isLazy }).defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
this.updateSrcsetSizes();
|
|
|
|
if (this.data.srcset) {
|
|
imageElement.srcset = this.data.srcset;
|
|
}
|
|
|
|
imageElement.src = this.data.src;
|
|
|
|
imageElement.alt = this.data.alt || '';
|
|
|
|
this.state = LOAD_STATE.LOADING;
|
|
|
|
if (imageElement.complete) {
|
|
this.onLoaded();
|
|
} else {
|
|
imageElement.onload = () => {
|
|
this.onLoaded();
|
|
};
|
|
|
|
imageElement.onerror = () => {
|
|
this.onError();
|
|
};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Assign slide to content
|
|
*
|
|
* @param {Slide} slide
|
|
*/
|
|
setSlide(slide) {
|
|
this.slide = slide;
|
|
this.hasSlide = true;
|
|
this.instance = slide.pswp;
|
|
|
|
// todo: do we need to unset slide?
|
|
}
|
|
|
|
/**
|
|
* Content load success handler
|
|
*/
|
|
onLoaded() {
|
|
this.state = LOAD_STATE.LOADED;
|
|
|
|
if (this.slide) {
|
|
this.instance.dispatch('loadComplete', { slide: this.slide, content: this });
|
|
|
|
// if content is reloaded
|
|
if (this.slide.isActive
|
|
&& this.slide.heavyAppended
|
|
&& !this.element.parentNode) {
|
|
this.append();
|
|
this.slide.updateContentSize(true);
|
|
}
|
|
|
|
if (this.state === LOAD_STATE.LOADED || this.state === LOAD_STATE.ERROR) {
|
|
this.removePlaceholder();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Content load error handler
|
|
*/
|
|
onError() {
|
|
this.state = LOAD_STATE.ERROR;
|
|
|
|
if (this.slide) {
|
|
this.displayError();
|
|
this.instance.dispatch('loadComplete', { slide: this.slide, isError: true, content: this });
|
|
this.instance.dispatch('loadError', { slide: this.slide, content: this });
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @returns {Boolean} If the content is currently loading
|
|
*/
|
|
isLoading() {
|
|
return this.instance.applyFilters(
|
|
'isContentLoading',
|
|
this.state === LOAD_STATE.LOADING,
|
|
this
|
|
);
|
|
}
|
|
|
|
isError() {
|
|
return this.state === LOAD_STATE.ERROR;
|
|
}
|
|
|
|
/**
|
|
* @returns {boolean} If the content is image
|
|
*/
|
|
isImageContent() {
|
|
return this.type === 'image';
|
|
}
|
|
|
|
/**
|
|
* Update content size
|
|
*
|
|
* @param {Number} width
|
|
* @param {Number} height
|
|
*/
|
|
setDisplayedSize(width, height) {
|
|
if (!this.element) {
|
|
return;
|
|
}
|
|
|
|
if (this.placeholder) {
|
|
this.placeholder.setDisplayedSize(width, height);
|
|
}
|
|
|
|
// eslint-disable-next-line max-len
|
|
if (this.instance.dispatch('contentResize', { content: this, width, height }).defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
setWidthHeight(this.element, width, height);
|
|
|
|
if (this.isImageContent() && !this.isError()) {
|
|
const isInitialSizeUpdate = (!this.displayedImageWidth && width);
|
|
|
|
this.displayedImageWidth = width;
|
|
this.displayedImageHeight = height;
|
|
|
|
if (isInitialSizeUpdate) {
|
|
this.loadImage(false);
|
|
} else {
|
|
this.updateSrcsetSizes();
|
|
}
|
|
|
|
if (this.slide) {
|
|
// eslint-disable-next-line max-len
|
|
this.instance.dispatch('imageSizeChange', { slide: this.slide, width, height, content: this });
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @returns {boolean} If the content can be zoomed
|
|
*/
|
|
isZoomable() {
|
|
return this.instance.applyFilters(
|
|
'isContentZoomable',
|
|
this.isImageContent() && (this.state !== LOAD_STATE.ERROR),
|
|
this
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Update image srcset sizes attribute based on width and height
|
|
*/
|
|
updateSrcsetSizes() {
|
|
// Handle srcset sizes attribute.
|
|
//
|
|
// Never lower quality, if it was increased previously.
|
|
// Chrome does this automatically, Firefox and Safari do not,
|
|
// so we store largest used size in dataset.
|
|
// Handle srcset sizes attribute.
|
|
//
|
|
// Never lower quality, if it was increased previously.
|
|
// Chrome does this automatically, Firefox and Safari do not,
|
|
// so we store largest used size in dataset.
|
|
if (this.data.srcset) {
|
|
const image = /** @type HTMLImageElement */ (this.element);
|
|
const sizesWidth = this.instance.applyFilters(
|
|
'srcsetSizesWidth',
|
|
this.displayedImageWidth,
|
|
this
|
|
);
|
|
|
|
if (!image.dataset.largestUsedSize
|
|
|| sizesWidth > parseInt(image.dataset.largestUsedSize, 10)) {
|
|
image.sizes = sizesWidth + 'px';
|
|
image.dataset.largestUsedSize = String(sizesWidth);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @returns {boolean} If content should use a placeholder (from msrc by default)
|
|
*/
|
|
usePlaceholder() {
|
|
return this.instance.applyFilters(
|
|
'useContentPlaceholder',
|
|
this.isImageContent(),
|
|
this
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Preload content with lazy-loading param
|
|
*/
|
|
lazyLoad() {
|
|
if (this.instance.dispatch('contentLazyLoad', { content: this }).defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
this.load(true);
|
|
}
|
|
|
|
/**
|
|
* @returns {boolean} If placeholder should be kept after content is loaded
|
|
*/
|
|
keepPlaceholder() {
|
|
return this.instance.applyFilters(
|
|
'isKeepingPlaceholder',
|
|
this.isLoading(),
|
|
this
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Destroy the content
|
|
*/
|
|
destroy() {
|
|
this.hasSlide = false;
|
|
this.slide = null;
|
|
|
|
if (this.instance.dispatch('contentDestroy', { content: this }).defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
this.remove();
|
|
|
|
if (this.placeholder) {
|
|
this.placeholder.destroy();
|
|
this.placeholder = null;
|
|
}
|
|
|
|
if (this.isImageContent() && this.element) {
|
|
this.element.onload = null;
|
|
this.element.onerror = null;
|
|
this.element = null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Display error message
|
|
*/
|
|
displayError() {
|
|
if (this.slide) {
|
|
/** @type {HTMLElement} */
|
|
let errorMsgEl = createElement('pswp__error-msg');
|
|
errorMsgEl.innerText = this.instance.options.errorMsg;
|
|
errorMsgEl = this.instance.applyFilters(
|
|
'contentErrorElement',
|
|
errorMsgEl,
|
|
this
|
|
);
|
|
this.element = createElement('pswp__content pswp__error-msg-container');
|
|
this.element.appendChild(errorMsgEl);
|
|
this.slide.container.innerText = '';
|
|
this.slide.container.appendChild(this.element);
|
|
this.slide.updateContentSize(true);
|
|
this.removePlaceholder();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Append the content
|
|
*/
|
|
append() {
|
|
if (this.isAttached) {
|
|
return;
|
|
}
|
|
|
|
this.isAttached = true;
|
|
|
|
if (this.state === LOAD_STATE.ERROR) {
|
|
this.displayError();
|
|
return;
|
|
}
|
|
|
|
if (this.instance.dispatch('contentAppend', { content: this }).defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
const supportsDecode = ('decode' in this.element);
|
|
|
|
if (this.isImageContent()) {
|
|
// Use decode() on nearby slides
|
|
//
|
|
// Nearby slide images are in DOM and not hidden via display:none.
|
|
// However, they are placed offscreen (to the left and right side).
|
|
//
|
|
// Some browsers do not composite the image until it's actually visible,
|
|
// using decode() helps.
|
|
//
|
|
// You might ask "why dont you just decode() and then append all images",
|
|
// that's because I want to show image before it's fully loaded,
|
|
// as browser can render parts of image while it is loading.
|
|
// We do not do this in Safari due to partial loading bug.
|
|
if (supportsDecode && this.slide && (!this.slide.isActive || isSafari())) {
|
|
this.isDecoding = true;
|
|
// purposefully using finally instead of then,
|
|
// as if srcset sizes changes dynamically - it may cause decode error
|
|
/** @type {HTMLImageElement} */
|
|
(this.element).decode().finally(() => {
|
|
this.isDecoding = false;
|
|
this.appendImage();
|
|
});
|
|
} else {
|
|
this.appendImage();
|
|
}
|
|
} else if (this.element && !this.element.parentNode) {
|
|
this.slide.container.appendChild(this.element);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Activate the slide,
|
|
* active slide is generally the current one,
|
|
* meaning the user can see it.
|
|
*/
|
|
activate() {
|
|
if (this.instance.dispatch('contentActivate', { content: this }).defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
if (this.slide) {
|
|
if (this.isImageContent() && this.isDecoding && !isSafari()) {
|
|
// add image to slide when it becomes active,
|
|
// even if it's not finished decoding
|
|
this.appendImage();
|
|
} else if (this.isError()) {
|
|
this.load(false, true); // try to reload
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Deactivate the content
|
|
*/
|
|
deactivate() {
|
|
this.instance.dispatch('contentDeactivate', { content: this });
|
|
}
|
|
|
|
|
|
/**
|
|
* Remove the content from DOM
|
|
*/
|
|
remove() {
|
|
this.isAttached = false;
|
|
|
|
if (this.instance.dispatch('contentRemove', { content: this }).defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
if (this.element && this.element.parentNode) {
|
|
this.element.remove();
|
|
}
|
|
|
|
if (this.placeholder && this.placeholder.element) {
|
|
this.placeholder.element.remove();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Append the image content to slide container
|
|
*/
|
|
appendImage() {
|
|
if (!this.isAttached) {
|
|
return;
|
|
}
|
|
|
|
if (this.instance.dispatch('contentAppendImage', { content: this }).defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
// ensure that element exists and is not already appended
|
|
if (this.slide && this.element && !this.element.parentNode) {
|
|
this.slide.container.appendChild(this.element);
|
|
}
|
|
|
|
if (this.state === LOAD_STATE.LOADED || this.state === LOAD_STATE.ERROR) {
|
|
this.removePlaceholder();
|
|
}
|
|
}
|
|
}
|
|
|
|
/** @typedef {import('../photoswipe.js').PhotoSwipeOptions} PhotoSwipeOptions */
|
|
/** @typedef {import('../photoswipe.js').default} PhotoSwipe */
|
|
/** @typedef {import('../slide/slide.js').SlideData} SlideData */
|
|
|
|
/**
|
|
* @param {PhotoSwipeOptions} options
|
|
* @param {PhotoSwipe} pswp
|
|
*/
|
|
function getViewportSize(options, pswp) {
|
|
if (options.getViewportSizeFn) {
|
|
const newViewportSize = options.getViewportSizeFn(options, pswp);
|
|
if (newViewportSize) {
|
|
return newViewportSize;
|
|
}
|
|
}
|
|
|
|
return {
|
|
x: document.documentElement.clientWidth,
|
|
|
|
// TODO: height on mobile is very incosistent due to toolbar
|
|
// find a way to improve this
|
|
//
|
|
// document.documentElement.clientHeight - doesn't seem to work well
|
|
y: window.innerHeight
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Parses padding option.
|
|
* Supported formats:
|
|
*
|
|
* // Object
|
|
* padding: {
|
|
* top: 0,
|
|
* bottom: 0,
|
|
* left: 0,
|
|
* right: 0
|
|
* }
|
|
*
|
|
* // A function that returns the object
|
|
* paddingFn: (viewportSize, itemData, index) => {
|
|
* return {
|
|
* top: 0,
|
|
* bottom: 0,
|
|
* left: 0,
|
|
* right: 0
|
|
* };
|
|
* }
|
|
*
|
|
* // Legacy variant
|
|
* paddingLeft: 0,
|
|
* paddingRight: 0,
|
|
* paddingTop: 0,
|
|
* paddingBottom: 0,
|
|
*
|
|
* @param {'left' | 'top' | 'bottom' | 'right'} prop
|
|
* @param {PhotoSwipeOptions} options PhotoSwipe options
|
|
* @param {{ x?: number; y?: number }} viewportSize PhotoSwipe viewport size, for example: { x:800, y:600 }
|
|
* @param {SlideData} itemData Data about the slide
|
|
* @param {number} index Slide index
|
|
* @returns {number}
|
|
*/
|
|
function parsePaddingOption(prop, options, viewportSize, itemData, index) {
|
|
/** @type {number} */
|
|
let paddingValue;
|
|
|
|
if (options.paddingFn) {
|
|
paddingValue = options.paddingFn(viewportSize, itemData, index)[prop];
|
|
} else if (options.padding) {
|
|
paddingValue = options.padding[prop];
|
|
} else {
|
|
const legacyPropName = 'padding' + prop[0].toUpperCase() + prop.slice(1);
|
|
// @ts-expect-error
|
|
if (options[legacyPropName]) {
|
|
// @ts-expect-error
|
|
paddingValue = options[legacyPropName];
|
|
}
|
|
}
|
|
|
|
return paddingValue || 0;
|
|
}
|
|
|
|
/**
|
|
* @param {PhotoSwipeOptions} options
|
|
* @param {{ x?: number; y?: number }} viewportSize
|
|
* @param {SlideData} itemData
|
|
* @param {number} index
|
|
*/
|
|
function getPanAreaSize(options, viewportSize, itemData, index) {
|
|
return {
|
|
x: viewportSize.x
|
|
- parsePaddingOption('left', options, viewportSize, itemData, index)
|
|
- parsePaddingOption('right', options, viewportSize, itemData, index),
|
|
y: viewportSize.y
|
|
- parsePaddingOption('top', options, viewportSize, itemData, index)
|
|
- parsePaddingOption('bottom', options, viewportSize, itemData, index)
|
|
};
|
|
}
|
|
|
|
const MAX_IMAGE_WIDTH = 4000;
|
|
|
|
/** @typedef {import('../photoswipe.js').default} PhotoSwipe */
|
|
/** @typedef {import('../photoswipe.js').PhotoSwipeOptions} PhotoSwipeOptions */
|
|
/** @typedef {import('../slide/slide.js').SlideData} SlideData */
|
|
|
|
/** @typedef {'fit' | 'fill' | number | ((zoomLevelObject: ZoomLevel) => number)} ZoomLevelOption */
|
|
|
|
/**
|
|
* Calculates zoom levels for specific slide.
|
|
* Depends on viewport size and image size.
|
|
*/
|
|
class ZoomLevel {
|
|
/**
|
|
* @param {PhotoSwipeOptions} options PhotoSwipe options
|
|
* @param {SlideData} itemData Slide data
|
|
* @param {number} index Slide index
|
|
* @param {PhotoSwipe=} pswp PhotoSwipe instance, can be undefined if not initialized yet
|
|
*/
|
|
constructor(options, itemData, index, pswp) {
|
|
this.pswp = pswp;
|
|
this.options = options;
|
|
this.itemData = itemData;
|
|
this.index = index;
|
|
}
|
|
|
|
/**
|
|
* Calculate initial, secondary and maximum zoom level for the specified slide.
|
|
*
|
|
* It should be called when either image or viewport size changes.
|
|
*
|
|
* @param {number} maxWidth
|
|
* @param {number} maxHeight
|
|
* @param {{ x?: number; y?: number }} panAreaSize
|
|
*/
|
|
update(maxWidth, maxHeight, panAreaSize) {
|
|
this.elementSize = {
|
|
x: maxWidth,
|
|
y: maxHeight
|
|
};
|
|
|
|
this.panAreaSize = panAreaSize;
|
|
|
|
const hRatio = this.panAreaSize.x / this.elementSize.x;
|
|
const vRatio = this.panAreaSize.y / this.elementSize.y;
|
|
|
|
this.fit = Math.min(1, hRatio < vRatio ? hRatio : vRatio);
|
|
this.fill = Math.min(1, hRatio > vRatio ? hRatio : vRatio);
|
|
|
|
// zoom.vFill defines zoom level of the image
|
|
// when it has 100% of viewport vertical space (height)
|
|
this.vFill = Math.min(1, vRatio);
|
|
|
|
this.initial = this._getInitial();
|
|
this.secondary = this._getSecondary();
|
|
this.max = Math.max(
|
|
this.initial,
|
|
this.secondary,
|
|
this._getMax()
|
|
);
|
|
|
|
this.min = Math.min(
|
|
this.fit,
|
|
this.initial,
|
|
this.secondary
|
|
);
|
|
|
|
if (this.pswp) {
|
|
this.pswp.dispatch('zoomLevelsUpdate', { zoomLevels: this, slideData: this.itemData });
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parses user-defined zoom option.
|
|
*
|
|
* @private
|
|
* @param {'initial' | 'secondary' | 'max'} optionPrefix Zoom level option prefix (initial, secondary, max)
|
|
*/
|
|
_parseZoomLevelOption(optionPrefix) {
|
|
// eslint-disable-next-line max-len
|
|
const optionName = /** @type {'initialZoomLevel' | 'secondaryZoomLevel' | 'maxZoomLevel'} */ (optionPrefix + 'ZoomLevel');
|
|
const optionValue = this.options[optionName];
|
|
|
|
if (!optionValue) {
|
|
return;
|
|
}
|
|
|
|
if (typeof optionValue === 'function') {
|
|
return optionValue(this);
|
|
}
|
|
|
|
if (optionValue === 'fill') {
|
|
return this.fill;
|
|
}
|
|
|
|
if (optionValue === 'fit') {
|
|
return this.fit;
|
|
}
|
|
|
|
return Number(optionValue);
|
|
}
|
|
|
|
/**
|
|
* Get zoom level to which image will be zoomed after double-tap gesture,
|
|
* or when user clicks on zoom icon,
|
|
* or mouse-click on image itself.
|
|
* If you return 1 image will be zoomed to its original size.
|
|
*
|
|
* @private
|
|
* @return {number}
|
|
*/
|
|
_getSecondary() {
|
|
let currZoomLevel = this._parseZoomLevelOption('secondary');
|
|
|
|
if (currZoomLevel) {
|
|
return currZoomLevel;
|
|
}
|
|
|
|
// 3x of "fit" state, but not larger than original
|
|
currZoomLevel = Math.min(1, this.fit * 3);
|
|
|
|
if (currZoomLevel * this.elementSize.x > MAX_IMAGE_WIDTH) {
|
|
currZoomLevel = MAX_IMAGE_WIDTH / this.elementSize.x;
|
|
}
|
|
|
|
return currZoomLevel;
|
|
}
|
|
|
|
/**
|
|
* Get initial image zoom level.
|
|
*
|
|
* @private
|
|
* @return {number}
|
|
*/
|
|
_getInitial() {
|
|
return this._parseZoomLevelOption('initial') || this.fit;
|
|
}
|
|
|
|
/**
|
|
* Maximum zoom level when user zooms
|
|
* via zoom/pinch gesture,
|
|
* via cmd/ctrl-wheel or via trackpad.
|
|
*
|
|
* @private
|
|
* @return {number}
|
|
*/
|
|
_getMax() {
|
|
const currZoomLevel = this._parseZoomLevelOption('max');
|
|
|
|
if (currZoomLevel) {
|
|
return currZoomLevel;
|
|
}
|
|
|
|
// max zoom level is x4 from "fit state",
|
|
// used for zoom gesture and ctrl/trackpad zoom
|
|
return Math.max(1, this.fit * 4);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Lazy-load an image
|
|
* This function is used both by Lightbox and PhotoSwipe core,
|
|
* thus it can be called before dialog is opened.
|
|
*
|
|
* @param {SlideData} itemData Data about the slide
|
|
* @param {PhotoSwipe | PhotoSwipeLightbox | PhotoSwipeBase} instance PhotoSwipe instance
|
|
* @param {number} index
|
|
* @returns Image that is being decoded or false.
|
|
*/
|
|
function lazyLoadData(itemData, instance, index) {
|
|
// src/slide/content/content.js
|
|
const content = instance.createContentFromData(itemData, index);
|
|
|
|
if (!content || !content.lazyLoad) {
|
|
return;
|
|
}
|
|
|
|
const { options } = instance;
|
|
|
|
// We need to know dimensions of the image to preload it,
|
|
// as it might use srcset and we need to define sizes
|
|
// @ts-expect-error should provide pswp instance?
|
|
const viewportSize = instance.viewportSize || getViewportSize(options, instance);
|
|
const panAreaSize = getPanAreaSize(options, viewportSize, itemData, index);
|
|
|
|
const zoomLevel = new ZoomLevel(options, itemData, -1);
|
|
zoomLevel.update(content.width, content.height, panAreaSize);
|
|
|
|
content.lazyLoad();
|
|
content.setDisplayedSize(
|
|
Math.ceil(content.width * zoomLevel.initial),
|
|
Math.ceil(content.height * zoomLevel.initial)
|
|
);
|
|
|
|
return content;
|
|
}
|
|
|
|
|
|
/**
|
|
* Lazy-loads specific slide.
|
|
* This function is used both by Lightbox and PhotoSwipe core,
|
|
* thus it can be called before dialog is opened.
|
|
*
|
|
* By default it loads image based on viewport size and initial zoom level.
|
|
*
|
|
* @param {number} index Slide index
|
|
* @param {PhotoSwipe | PhotoSwipeLightbox} instance PhotoSwipe or PhotoSwipeLightbox eventable instance
|
|
*/
|
|
function lazyLoadSlide(index, instance) {
|
|
const itemData = instance.getItemData(index);
|
|
|
|
if (instance.dispatch('lazyLoadSlide', { index, itemData }).defaultPrevented) {
|
|
return;
|
|
}
|
|
|
|
return lazyLoadData(itemData, instance, index);
|
|
}
|
|
|
|
/** @typedef {import("../photoswipe.js").default} PhotoSwipe */
|
|
/** @typedef {import("../photoswipe.js").PhotoSwipeOptions} PhotoSwipeOptions */
|
|
/** @typedef {import("../slide/slide.js").SlideData} SlideData */
|
|
|
|
/**
|
|
* PhotoSwipe base class that can retrieve data about every slide.
|
|
* Shared by PhotoSwipe Core and PhotoSwipe Lightbox
|
|
*/
|
|
class PhotoSwipeBase extends Eventable {
|
|
/**
|
|
* Get total number of slides
|
|
*
|
|
* @returns {number}
|
|
*/
|
|
getNumItems() {
|
|
let numItems;
|
|
const { dataSource } = this.options;
|
|
if (!dataSource) {
|
|
numItems = 0;
|
|
} else if ('length' in dataSource) {
|
|
// may be an array or just object with length property
|
|
numItems = dataSource.length;
|
|
} else if ('gallery' in dataSource) {
|
|
// query DOM elements
|
|
if (!dataSource.items) {
|
|
dataSource.items = this._getGalleryDOMElements(dataSource.gallery);
|
|
}
|
|
|
|
if (dataSource.items) {
|
|
numItems = dataSource.items.length;
|
|
}
|
|
}
|
|
|
|
// legacy event, before filters were introduced
|
|
const event = this.dispatch('numItems', {
|
|
dataSource,
|
|
numItems
|
|
});
|
|
return this.applyFilters('numItems', event.numItems, dataSource);
|
|
}
|
|
|
|
/**
|
|
* @param {SlideData} slideData
|
|
* @param {number} index
|
|
*/
|
|
createContentFromData(slideData, index) {
|
|
// @ts-expect-error
|
|
return new Content(slideData, this, index);
|
|
}
|
|
|
|
/**
|
|
* Get item data by index.
|
|
*
|
|
* "item data" should contain normalized information that PhotoSwipe needs to generate a slide.
|
|
* For example, it may contain properties like
|
|
* `src`, `srcset`, `w`, `h`, which will be used to generate a slide with image.
|
|
*
|
|
* @param {number} index
|
|
*/
|
|
getItemData(index) {
|
|
const { dataSource } = this.options;
|
|
let dataSourceItem;
|
|
if (Array.isArray(dataSource)) {
|
|
// Datasource is an array of elements
|
|
dataSourceItem = dataSource[index];
|
|
} else if (dataSource && dataSource.gallery) {
|
|
// dataSource has gallery property,
|
|
// thus it was created by Lightbox, based on
|
|
// gallery and children options
|
|
|
|
// query DOM elements
|
|
if (!dataSource.items) {
|
|
dataSource.items = this._getGalleryDOMElements(dataSource.gallery);
|
|
}
|
|
|
|
dataSourceItem = dataSource.items[index];
|
|
}
|
|
|
|
let itemData = dataSourceItem;
|
|
|
|
if (itemData instanceof Element) {
|
|
itemData = this._domElementToItemData(itemData);
|
|
}
|
|
|
|
// Dispatching the itemData event,
|
|
// it's a legacy verion before filters were introduced
|
|
const event = this.dispatch('itemData', {
|
|
itemData: itemData || {},
|
|
index
|
|
});
|
|
|
|
return this.applyFilters('itemData', event.itemData, index);
|
|
}
|
|
|
|
/**
|
|
* Get array of gallery DOM elements,
|
|
* based on childSelector and gallery element.
|
|
*
|
|
* @param {HTMLElement} galleryElement
|
|
*/
|
|
_getGalleryDOMElements(galleryElement) {
|
|
if (this.options.children || this.options.childSelector) {
|
|
return getElementsFromOption(
|
|
this.options.children,
|
|
this.options.childSelector,
|
|
galleryElement
|
|
) || [];
|
|
}
|
|
|
|
return [galleryElement];
|
|
}
|
|
|
|
/**
|
|
* Converts DOM element to item data object.
|
|
*
|
|
* @param {HTMLElement} element DOM element
|
|
*/
|
|
// eslint-disable-next-line class-methods-use-this
|
|
_domElementToItemData(element) {
|
|
/** @type {SlideData} */
|
|
const itemData = {
|
|
element
|
|
};
|
|
|
|
// eslint-disable-next-line max-len
|
|
const linkEl = /** @type {HTMLAnchorElement} */ (element.tagName === 'A' ? element : element.querySelector('a'));
|
|
|
|
if (linkEl) {
|
|
// src comes from data-pswp-src attribute,
|
|
// if it's empty link href is used
|
|
itemData.src = linkEl.dataset.pswpSrc || linkEl.href;
|
|
|
|
if (linkEl.dataset.pswpSrcset) {
|
|
itemData.srcset = linkEl.dataset.pswpSrcset;
|
|
}
|
|
|
|
itemData.width = parseInt(linkEl.dataset.pswpWidth, 10);
|
|
itemData.height = parseInt(linkEl.dataset.pswpHeight, 10);
|
|
|
|
// support legacy w & h properties
|
|
itemData.w = itemData.width;
|
|
itemData.h = itemData.height;
|
|
|
|
if (linkEl.dataset.pswpType) {
|
|
itemData.type = linkEl.dataset.pswpType;
|
|
}
|
|
|
|
const thumbnailEl = element.querySelector('img');
|
|
|
|
if (thumbnailEl) {
|
|
// msrc is URL to placeholder image that's displayed before large image is loaded
|
|
// by default it's displayed only for the first slide
|
|
itemData.msrc = thumbnailEl.currentSrc || thumbnailEl.src;
|
|
itemData.alt = thumbnailEl.getAttribute('alt');
|
|
}
|
|
|
|
if (linkEl.dataset.pswpCropped || linkEl.dataset.cropped) {
|
|
itemData.thumbCropped = true;
|
|
}
|
|
}
|
|
|
|
return this.applyFilters('domItemData', itemData, element, linkEl);
|
|
}
|
|
|
|
/**
|
|
* Lazy-load by slide data
|
|
*
|
|
* @param {SlideData} itemData Data about the slide
|
|
* @param {number} index
|
|
* @returns Image that is being decoded or false.
|
|
*/
|
|
lazyLoadData(itemData, index) {
|
|
return lazyLoadData(itemData, this, index);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @template T
|
|
* @typedef {import('../types.js').Type<T>} Type<T>
|
|
*/
|
|
|
|
/** @typedef {import('../photoswipe.js').default} PhotoSwipe */
|
|
/** @typedef {import('../photoswipe.js').PhotoSwipeOptions} PhotoSwipeOptions */
|
|
/** @typedef {import('../photoswipe.js').DataSource} DataSource */
|
|
/** @typedef {import('../slide/content.js').default} Content */
|
|
/** @typedef {import('../core/eventable.js').PhotoSwipeEventsMap} PhotoSwipeEventsMap */
|
|
/** @typedef {import('../core/eventable.js').PhotoSwipeFiltersMap} PhotoSwipeFiltersMap */
|
|
|
|
/**
|
|
* @template T
|
|
* @typedef {import('../core/eventable.js').EventCallback<T>} EventCallback<T>
|
|
*/
|
|
|
|
/**
|
|
* PhotoSwipe Lightbox
|
|
*
|
|
* - If user has unsupported browser it falls back to default browser action (just opens URL)
|
|
* - Binds click event to links that should open PhotoSwipe
|
|
* - parses DOM strcture for PhotoSwipe (retrieves large image URLs and sizes)
|
|
* - Initializes PhotoSwipe
|
|
*
|
|
*
|
|
* Loader options use the same object as PhotoSwipe, and supports such options:
|
|
*
|
|
* gallery - Element | Element[] | NodeList | string selector for the gallery element
|
|
* children - Element | Element[] | NodeList | string selector for the gallery children
|
|
*
|
|
*/
|
|
class PhotoSwipeLightbox extends PhotoSwipeBase {
|
|
/**
|
|
* @param {PhotoSwipeOptions} options
|
|
*/
|
|
constructor(options) {
|
|
super();
|
|
/** @type {PhotoSwipeOptions} */
|
|
this.options = options || {};
|
|
this._uid = 0;
|
|
}
|
|
|
|
/**
|
|
* Initialize lightbox, should be called only once.
|
|
* It's not included in the main constructor, so you may bind events before it.
|
|
*/
|
|
init() {
|
|
this.onThumbnailsClick = this.onThumbnailsClick.bind(this);
|
|
|
|
// Bind click events to each gallery
|
|
getElementsFromOption(this.options.gallery, this.options.gallerySelector)
|
|
.forEach((galleryElement) => {
|
|
galleryElement.addEventListener('click', this.onThumbnailsClick, false);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @param {MouseEvent} e
|
|
*/
|
|
onThumbnailsClick(e) {
|
|
// Exit and allow default browser action if:
|
|
if (specialKeyUsed(e) // ... if clicked with a special key (ctrl/cmd...)
|
|
|| window.pswp // ... if PhotoSwipe is already open
|
|
|| window.navigator.onLine === false) { // ... if offline
|
|
return;
|
|
}
|
|
|
|
// If both clientX and clientY are 0 or not defined,
|
|
// the event is likely triggered by keyboard,
|
|
// so we do not pass the initialPoint
|
|
//
|
|
// Note that some screen readers emulate the mouse position,
|
|
// so it's not ideal way to detect them.
|
|
//
|
|
let initialPoint = { x: e.clientX, y: e.clientY };
|
|
|
|
if (!initialPoint.x && !initialPoint.y) {
|
|
initialPoint = null;
|
|
}
|
|
|
|
let clickedIndex = this.getClickedIndex(e);
|
|
clickedIndex = this.applyFilters('clickedIndex', clickedIndex, e, this);
|
|
const dataSource = {
|
|
gallery: /** @type {HTMLElement} */ (e.currentTarget)
|
|
};
|
|
|
|
if (clickedIndex >= 0) {
|
|
e.preventDefault();
|
|
this.loadAndOpen(clickedIndex, dataSource, initialPoint);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get index of gallery item that was clicked.
|
|
*
|
|
* @param {MouseEvent} e click event
|
|
*/
|
|
getClickedIndex(e) {
|
|
// legacy option
|
|
if (this.options.getClickedIndexFn) {
|
|
return this.options.getClickedIndexFn.call(this, e);
|
|
}
|
|
|
|
const clickedTarget = /** @type {HTMLElement} */ (e.target);
|
|
const childElements = getElementsFromOption(
|
|
this.options.children,
|
|
this.options.childSelector,
|
|
/** @type {HTMLElement} */ (e.currentTarget)
|
|
);
|
|
const clickedChildIndex = childElements.findIndex(
|
|
child => child === clickedTarget || child.contains(clickedTarget)
|
|
);
|
|
|
|
if (clickedChildIndex !== -1) {
|
|
return clickedChildIndex;
|
|
} else if (this.options.children || this.options.childSelector) {
|
|
// click wasn't on a child element
|
|
return -1;
|
|
}
|
|
|
|
// There is only one item (which is the gallery)
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Load and open PhotoSwipe
|
|
*
|
|
* @param {number} index
|
|
* @param {DataSource=} dataSource
|
|
* @param {{ x?: number; y?: number }} [initialPoint]
|
|
*/
|
|
loadAndOpen(index, dataSource, initialPoint) {
|
|
// Check if the gallery is already open
|
|
if (window.pswp) {
|
|
return false;
|
|
}
|
|
|
|
// set initial index
|
|
this.options.index = index;
|
|
|
|
// define options for PhotoSwipe constructor
|
|
this.options.initialPointerPos = initialPoint;
|
|
|
|
this.shouldOpen = true;
|
|
this.preload(index, dataSource);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Load the main module and the slide content by index
|
|
*
|
|
* @param {number} index
|
|
* @param {DataSource=} dataSource
|
|
*/
|
|
preload(index, dataSource) {
|
|
const { options } = this;
|
|
|
|
if (dataSource) {
|
|
options.dataSource = dataSource;
|
|
}
|
|
|
|
// Add the main module
|
|
/** @type {Promise<Type<PhotoSwipe>>[]} */
|
|
const promiseArray = [];
|
|
|
|
const pswpModuleType = typeof options.pswpModule;
|
|
if (isPswpClass(options.pswpModule)) {
|
|
promiseArray.push(Promise.resolve(/** @type {Type<PhotoSwipe>} */ (options.pswpModule)));
|
|
} else if (pswpModuleType === 'string') {
|
|
throw new Error('pswpModule as string is no longer supported');
|
|
} else if (pswpModuleType === 'function') {
|
|
promiseArray.push(/** @type {() => Promise<Type<PhotoSwipe>>} */ (options.pswpModule)());
|
|
} else {
|
|
throw new Error('pswpModule is not valid');
|
|
}
|
|
|
|
// Add custom-defined promise, if any
|
|
if (typeof options.openPromise === 'function') {
|
|
// allow developers to perform some task before opening
|
|
promiseArray.push(options.openPromise());
|
|
}
|
|
|
|
if (options.preloadFirstSlide !== false && index >= 0) {
|
|
this._preloadedContent = lazyLoadSlide(index, this);
|
|
}
|
|
|
|
// Wait till all promises resolve and open PhotoSwipe
|
|
const uid = ++this._uid;
|
|
Promise.all(promiseArray).then((iterableModules) => {
|
|
if (this.shouldOpen) {
|
|
const mainModule = iterableModules[0];
|
|
this._openPhotoswipe(mainModule, uid);
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @private
|
|
* @param {Type<PhotoSwipe> | { default: Type<PhotoSwipe> }} module
|
|
* @param {number} uid
|
|
*/
|
|
_openPhotoswipe(module, uid) {
|
|
// Cancel opening if UID doesn't match the current one
|
|
// (if user clicked on another gallery item before current was loaded).
|
|
//
|
|
// Or if shouldOpen flag is set to false
|
|
// (developer may modify it via public API)
|
|
if (uid !== this._uid && this.shouldOpen) {
|
|
return;
|
|
}
|
|
|
|
this.shouldOpen = false;
|
|
|
|
// PhotoSwipe is already open
|
|
if (window.pswp) {
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Pass data to PhotoSwipe and open init
|
|
*
|
|
* @type {PhotoSwipe}
|
|
*/
|
|
const pswp = typeof module === 'object'
|
|
? new module.default(this.options) // eslint-disable-line
|
|
: new module(this.options); // eslint-disable-line
|
|
|
|
this.pswp = pswp;
|
|
window.pswp = pswp;
|
|
|
|
// map listeners from Lightbox to PhotoSwipe Core
|
|
/** @type {(keyof PhotoSwipeEventsMap)[]} */
|
|
(Object.keys(this._listeners)).forEach((name) => {
|
|
this._listeners[name].forEach((fn) => {
|
|
pswp.on(name, /** @type {EventCallback<typeof name>} */(fn));
|
|
});
|
|
});
|
|
|
|
// same with filters
|
|
/** @type {(keyof PhotoSwipeFiltersMap)[]} */
|
|
(Object.keys(this._filters)).forEach((name) => {
|
|
this._filters[name].forEach((filter) => {
|
|
pswp.addFilter(name, filter.fn, filter.priority);
|
|
});
|
|
});
|
|
|
|
if (this._preloadedContent) {
|
|
pswp.contentLoader.addToCache(this._preloadedContent);
|
|
this._preloadedContent = null;
|
|
}
|
|
|
|
pswp.on('destroy', () => {
|
|
// clean up public variables
|
|
this.pswp = null;
|
|
window.pswp = null;
|
|
});
|
|
|
|
pswp.init();
|
|
}
|
|
|
|
/**
|
|
* Unbinds all events, closes PhotoSwipe if it's open.
|
|
*/
|
|
destroy() {
|
|
if (this.pswp) {
|
|
this.pswp.destroy();
|
|
}
|
|
|
|
this.shouldOpen = false;
|
|
this._listeners = null;
|
|
|
|
getElementsFromOption(this.options.gallery, this.options.gallerySelector)
|
|
.forEach((galleryElement) => {
|
|
galleryElement.removeEventListener('click', this.onThumbnailsClick, false);
|
|
});
|
|
}
|
|
}
|
|
|
|
export { PhotoSwipeLightbox as default };
|
|
//# sourceMappingURL=photoswipe-lightbox.esm.js.map
|