1490 lines
68 KiB
JavaScript
1490 lines
68 KiB
JavaScript
/*!
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By André Rinas, www.andrerinas.de
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Documentation, www.simplelightbox.de
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Available for use under the MIT License
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Version 2.10.3
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*/
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class SimpleLightbox {
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defaultOptions = {
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sourceAttr: 'href',
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overlay: true,
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overlayOpacity: 0.7,
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spinner: true,
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nav: true,
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navText: ['‹', '›'],
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captions: true,
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captionDelay: 0,
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captionSelector: 'img',
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captionType: 'attr',
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captionsData: 'title',
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captionPosition: 'bottom',
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captionClass: '',
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close: true,
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closeText: '×',
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swipeClose: true,
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showCounter: true,
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fileExt: 'png|jpg|jpeg|gif|webp',
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animationSlide: true,
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animationSpeed: 250,
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preloading: true,
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enableKeyboard: true,
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loop: true,
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rel: false,
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docClose: true,
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swipeTolerance: 50,
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className: 'simple-lightbox',
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widthRatio: 0.8,
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heightRatio: 0.9,
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scaleImageToRatio: false,
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disableRightClick: false,
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disableScroll: true,
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alertError: true,
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alertErrorMessage: 'Image not found, next image will be loaded',
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additionalHtml: false,
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history: true,
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throttleInterval: 0,
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doubleTapZoom: 2,
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maxZoom: 10,
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htmlClass: 'has-lightbox',
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rtl: false,
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fixedClass: 'sl-fixed',
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fadeSpeed: 300,
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uniqueImages: true,
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focus: true,
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scrollZoom: true,
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scrollZoomFactor: 0.5
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};
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transitionPrefix;
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isPassiveEventsSupported;
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transitionCapable = false;
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isTouchDevice = ('ontouchstart' in window);
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isAppleDevice = /(Mac|iPhone|iPod|iPad)/i.test(navigator.platform);
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initialLocationHash;
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pushStateSupport = ('pushState' in history);
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isOpen = false;
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isAnimating = false;
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isClosing = false;
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isFadeIn = false;
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urlChangedOnce = false;
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hashReseted = false;
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historyHasChanges = false;
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historyUpdateTimeout = null;
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currentImage;
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eventNamespace = 'simplelightbox';
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domNodes = {};
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loadedImages = [];
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initialImageIndex = 0;
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currentImageIndex = 0;
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initialSelector = null;
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globalScrollbarWidth = 0;
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controlCoordinates = {
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swipeDiff: 0,
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swipeYDiff: 0,
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swipeStart: 0,
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swipeEnd: 0,
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swipeYStart: 0,
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swipeYEnd: 0,
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mousedown: false,
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imageLeft: 0,
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zoomed: false,
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containerHeight: 0,
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containerWidth: 0,
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containerOffsetX: 0,
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containerOffsetY: 0,
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imgHeight: 0,
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imgWidth: 0,
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capture: false,
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initialOffsetX: 0,
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initialOffsetY: 0,
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initialPointerOffsetX: 0,
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initialPointerOffsetY: 0,
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initialPointerOffsetX2: 0,
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initialPointerOffsetY2: 0,
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initialScale: 1,
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initialPinchDistance: 0,
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pointerOffsetX: 0,
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pointerOffsetY: 0,
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pointerOffsetX2: 0,
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pointerOffsetY2: 0,
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targetOffsetX: 0,
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targetOffsetY: 0,
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targetScale: 0,
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pinchOffsetX: 0,
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pinchOffsetY: 0,
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limitOffsetX: 0,
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limitOffsetY: 0,
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scaleDifference: 0,
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targetPinchDistance: 0,
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touchCount: 0,
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doubleTapped: false,
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touchmoveCount: 0
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};
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constructor(elements, options) {
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this.options = Object.assign(this.defaultOptions, options);
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this.isPassiveEventsSupported = this.checkPassiveEventsSupport();
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if (typeof elements === 'string') {
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this.initialSelector = elements;
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this.elements = Array.from(document.querySelectorAll(elements));
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} else {
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this.elements = ((typeof elements.length !== 'undefined') && elements.length > 0) ? Array.from(elements) : [elements];
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}
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this.relatedElements = [];
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this.transitionPrefix = this.calculateTransitionPrefix();
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this.transitionCapable = this.transitionPrefix !== false;
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this.initialLocationHash = this.hash;
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// this should be handled by attribute selector IMHO! => 'a[rel=bla]'...
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if (this.options.rel) {
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this.elements = this.getRelated(this.options.rel);
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}
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if (this.options.uniqueImages) {
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let imgArr = [];
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this.elements = Array.from(this.elements).filter(
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element => {
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let src = element.getAttribute(this.options.sourceAttr);
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if(imgArr.indexOf(src) === -1) {
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imgArr.push(src);
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return true;
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}
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return false;
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}
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);
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}
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this.createDomNodes();
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if (this.options.close) {
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this.domNodes.wrapper.appendChild(this.domNodes.closeButton);
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}
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if (this.options.nav) {
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this.domNodes.wrapper.appendChild(this.domNodes.navigation);
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}
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if (this.options.spinner) {
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this.domNodes.wrapper.appendChild(this.domNodes.spinner);
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}
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this.addEventListener(this.elements, 'click.' + this.eventNamespace, (event) => {
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if (this.isValidLink(event.currentTarget)) {
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event.preventDefault();
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if (this.isAnimating) {
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return false;
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}
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this.initialImageIndex = this.elements.indexOf(event.currentTarget);
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this.openImage(event.currentTarget);
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}
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});
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// close addEventListener click addEventListener doc
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if (this.options.docClose) {
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this.addEventListener(this.domNodes.wrapper, ['click.' + this.eventNamespace, 'touchstart.' + this.eventNamespace], (event) => {
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if (this.isOpen && event.target === event.currentTarget) {
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this.close();
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}
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});
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}
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// disable rightclick
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if (this.options.disableRightClick) {
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this.addEventListener(document.body, 'contextmenu.' + this.eventNamespace, (event) => {
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if (event.target.parentElement.classList.contains("sl-image")) {
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event.preventDefault();
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}
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});
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}
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// keyboard-control
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if (this.options.enableKeyboard) {
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this.addEventListener(document.body, 'keyup.' + this.eventNamespace, this.throttle((event) => {
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this.controlCoordinates.swipeDiff = 0;
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// keyboard control only if lightbox is open
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if (this.isAnimating && event.key === 'Escape') {
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this.currentImage.setAttribute('src', '');
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this.isAnimating = false;
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return this.close();
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}
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if (this.isOpen) {
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event.preventDefault();
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if (event.key === 'Escape') {
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this.close();
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}
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if(!this.isAnimating && ['ArrowLeft', 'ArrowRight'].indexOf(event.key) > -1) {
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this.loadImage(event.key === 'ArrowRight' ? 1 : -1);
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}
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}
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}, this.options.throttleInterval));
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}
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this.addEvents();
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}
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checkPassiveEventsSupport() {
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// https://github.com/WICG/EventListenerOptions/blob/gh-pages/explainer.md#feature-detection
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// Test via a getter in the options object to see if the passive property is accessed
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let supportsPassive = false;
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try {
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let opts = Object.defineProperty({}, 'passive', {
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get: function() {
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supportsPassive = true;
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}
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});
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window.addEventListener("testPassive", null, opts);
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window.removeEventListener("testPassive", null, opts);
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} catch (e) {}
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return supportsPassive;
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}
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createDomNodes() {
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this.domNodes.overlay = document.createElement('div');
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this.domNodes.overlay.classList.add('sl-overlay');
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this.domNodes.overlay.dataset.opacityTarget = this.options.overlayOpacity;
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this.domNodes.closeButton = document.createElement('button');
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this.domNodes.closeButton.classList.add('sl-close');
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this.domNodes.closeButton.innerHTML = this.options.closeText;
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this.domNodes.spinner = document.createElement('div');
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this.domNodes.spinner.classList.add('sl-spinner');
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this.domNodes.spinner.innerHTML = '<div></div>';
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this.domNodes.navigation = document.createElement('div');
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this.domNodes.navigation.classList.add('sl-navigation');
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this.domNodes.navigation.innerHTML = `<button class="sl-prev">${this.options.navText[0]}</button><button class="sl-next">${this.options.navText[1]}</button>`;
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this.domNodes.counter = document.createElement('div');
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this.domNodes.counter.classList.add('sl-counter');
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this.domNodes.counter.innerHTML = '<span class="sl-current"></span>/<span class="sl-total"></span>';
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this.domNodes.caption = document.createElement('div');
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this.domNodes.caption.classList.add('sl-caption', 'pos-' + this.options.captionPosition);
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if (this.options.captionClass) {
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this.domNodes.caption.classList.add(this.options.captionClass);
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}
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this.domNodes.image = document.createElement('div');
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this.domNodes.image.classList.add('sl-image');
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this.domNodes.wrapper = document.createElement('div');
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this.domNodes.wrapper.classList.add('sl-wrapper');
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this.domNodes.wrapper.setAttribute('tabindex',-1);
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this.domNodes.wrapper.setAttribute('role','dialog');
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this.domNodes.wrapper.setAttribute('aria-hidden',false);
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if (this.options.className) {
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this.domNodes.wrapper.classList.add(this.options.className);
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}
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if(this.options.rtl) {
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this.domNodes.wrapper.classList.add('sl-dir-rtl');
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}
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}
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throttle(func, limit) {
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let inThrottle;
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return function () {
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if (!inThrottle) {
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func.apply(this, arguments);
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inThrottle = true;
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setTimeout(function () {
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return inThrottle = false;
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}, limit);
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}
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};
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}
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isValidLink(element) {
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return (!this.options.fileExt) || ( element.getAttribute(this.options.sourceAttr) && (new RegExp('(' + this.options.fileExt + ')$', 'i')).test(element.getAttribute(this.options.sourceAttr)));
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}
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calculateTransitionPrefix() {
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let s = (document.body || document.documentElement).style;
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return 'transition' in s ? '' :
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'WebkitTransition' in s ? '-webkit-' :
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'MozTransition' in s ? '-moz-' :
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'OTransition' in s ? '-o' :
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false;
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}
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toggleScrollbar(type) {
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let scrollbarWidth = 0;
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let fixedElements = [].slice.call(document.querySelectorAll('.'+this.options.fixedClass))
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if (type === 'hide') {
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let fullWindowWidth = window.innerWidth;
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if (!fullWindowWidth) {
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let documentElementRect = document.documentElement.getBoundingClientRect();
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fullWindowWidth = documentElementRect.right - Math.abs(documentElementRect.left);
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}
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if (document.body.clientWidth < fullWindowWidth || this.isAppleDevice) {
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let scrollDiv = document.createElement('div'),
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paddingRight = parseInt(document.body.style.paddingRight || 0, 10);
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scrollDiv.classList.add('sl-scrollbar-measure');
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document.body.appendChild(scrollDiv);
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scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth;
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document.body.removeChild(scrollDiv);
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document.body.dataset.originalPaddingRight = paddingRight;
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if (scrollbarWidth > 0 || (scrollbarWidth == 0 && this.isAppleDevice)) {
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document.body.classList.add('hidden-scroll');
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document.body.style.paddingRight = (paddingRight + scrollbarWidth) + 'px';
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fixedElements.forEach(element => {
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const actualPadding = element.style.paddingRight
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const calculatedPadding = window.getComputedStyle(element)['padding-right']
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element.dataset.originalPaddingRight = actualPadding;
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element.style.paddingRight = `${parseFloat(calculatedPadding) + scrollbarWidth}px`
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});
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}
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}
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} else {
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document.body.classList.remove('hidden-scroll');
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document.body.style.paddingRight = document.body.dataset.originalPaddingRight;
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fixedElements.forEach(element => {
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const padding = element.dataset.originalPaddingRight;
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if (typeof padding !== 'undefined') {
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element.style.paddingRight = padding
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}
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});
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}
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return scrollbarWidth;
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}
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close() {
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if (!this.isOpen || this.isAnimating || this.isClosing) {
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return false;
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}
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this.isClosing = true;
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let element = this.relatedElements[this.currentImageIndex];
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element.dispatchEvent(new Event('close.simplelightbox'));
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if (this.options.history) {
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this.historyHasChanges = false;
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if(!this.hashReseted) {
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this.resetHash();
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}
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}
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this.removeEventListener(document, 'focusin.' + this.eventNamespace);
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this.fadeOut(this.domNodes.overlay, this.options.fadeSpeed);
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this.fadeOut(document.querySelectorAll('.sl-image img, .sl-close, .sl-navigation, .sl-image .sl-caption, .sl-counter'), this.options.fadeSpeed, () => {
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if (this.options.disableScroll) {
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this.toggleScrollbar('show');
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}
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if (this.options.htmlClass && this.options.htmlClass !== '') {
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document.querySelector('html').classList.remove(this.options.htmlClass);
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}
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document.body.removeChild(this.domNodes.wrapper);
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document.body.removeChild(this.domNodes.overlay);
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this.domNodes.additionalHtml = null;
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element.dispatchEvent(new Event('closed.simplelightbox'));
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this.isClosing = false;
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});
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this.currentImage = null;
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this.isOpen = false;
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this.isAnimating = false;
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// reset touchcontrol coordinates
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for (let key in this.controlCoordinates) {
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this.controlCoordinates[key] = 0;
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}
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this.controlCoordinates.mousedown = false;
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this.controlCoordinates.zoomed = false;
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this.controlCoordinates.capture = false;
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this.controlCoordinates.initialScale = this.minMax(1, 1, this.options.maxZoom);
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this.controlCoordinates.doubleTapped = false;
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}
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get hash() {
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return window.location.hash.substring(1);
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}
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preload() {
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let index = this.currentImageIndex,
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length = this.relatedElements.length,
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next = (index + 1 < 0) ? length - 1 : (index + 1 >= length - 1) ? 0 : index + 1,
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prev = (index - 1 < 0) ? length - 1 : (index - 1 >= length - 1) ? 0 : index - 1,
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nextImage = new Image(),
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prevImage = new Image();
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nextImage.addEventListener('load', (event) => {
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let src = event.target.getAttribute('src');
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if (this.loadedImages.indexOf(src) === -1) { //is this condition even required... setting multiple times will not change usage...
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this.loadedImages.push(src);
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}
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this.relatedElements[index].dispatchEvent(new Event('nextImageLoaded.' + this.eventNamespace));
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});
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nextImage.setAttribute('src', this.relatedElements[next].getAttribute(this.options.sourceAttr));
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prevImage.addEventListener('load', (event) => {
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let src = event.target.getAttribute('src');
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if (this.loadedImages.indexOf(src) === -1) {
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this.loadedImages.push(src);
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}
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this.relatedElements[index].dispatchEvent(new Event('prevImageLoaded.' + this.eventNamespace));
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});
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prevImage.setAttribute('src', this.relatedElements[prev].getAttribute(this.options.sourceAttr));
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}
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loadImage(direction) {
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let slideDirection = direction;
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if(this.options.rtl) {
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direction = -direction;
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}
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this.relatedElements[this.currentImageIndex].dispatchEvent(new Event('change.' + this.eventNamespace));
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this.relatedElements[this.currentImageIndex].dispatchEvent(new Event((direction === 1 ? 'next' : 'prev') + '.' + this.eventNamespace));
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let newIndex = this.currentImageIndex + direction;
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if (this.isAnimating || (newIndex < 0 || newIndex >= this.relatedElements.length) && this.options.loop === false) {
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return false;
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}
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this.currentImageIndex = (newIndex < 0) ? this.relatedElements.length - 1 : (newIndex > this.relatedElements.length - 1) ? 0 : newIndex;
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this.domNodes.counter.querySelector('.sl-current').innerHTML = this.currentImageIndex + 1;
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if (this.options.animationSlide) {
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this.slide(this.options.animationSpeed / 1000, (-100 * slideDirection) - this.controlCoordinates.swipeDiff + 'px');
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}
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this.fadeOut(this.domNodes.image, this.options.fadeSpeed, () => {
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this.isAnimating = true;
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if(!this.isClosing) {
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setTimeout(() => {
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let element = this.relatedElements[this.currentImageIndex];
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this.currentImage.setAttribute('src', element.getAttribute(this.options.sourceAttr));
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if (this.loadedImages.indexOf(element.getAttribute(this.options.sourceAttr)) === -1) {
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this.show(this.domNodes.spinner);
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}
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if(this.domNodes.image.contains(this.domNodes.caption)) {
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this.domNodes.image.removeChild(this.domNodes.caption);
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}
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this.adjustImage(slideDirection);
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if (this.options.preloading) this.preload();
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}, 100);
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} else {
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this.isAnimating = false;
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}
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});
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}
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adjustImage(direction) {
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if (!this.currentImage) {
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return false;
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}
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let tmpImage = new Image(),
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windowWidth = window.innerWidth * this.options.widthRatio,
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windowHeight = window.innerHeight * this.options.heightRatio;
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tmpImage.setAttribute('src', this.currentImage.getAttribute('src'));
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this.currentImage.dataset.scale = 1;
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this.currentImage.dataset.translateX = 0;
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this.currentImage.dataset.translateY = 0;
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this.zoomPanElement(0, 0, 1);
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tmpImage.addEventListener('error', (event) => {
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this.relatedElements[this.currentImageIndex].dispatchEvent(new Event('error.' + this.eventNamespace));
|
|
this.isAnimating = false;
|
|
this.isOpen = true;
|
|
this.domNodes.spinner.style.display = 'none';
|
|
|
|
let dirIsDefined = direction === 1 || direction === -1;
|
|
if (this.initialImageIndex === this.currentImageIndex && dirIsDefined) {
|
|
return this.close();
|
|
}
|
|
|
|
if (this.options.alertError) {
|
|
alert(this.options.alertErrorMessage);
|
|
}
|
|
|
|
this.loadImage(dirIsDefined ? direction : 1);
|
|
});
|
|
|
|
|
|
tmpImage.addEventListener('load', (event) => {
|
|
if (typeof direction !== 'undefined') {
|
|
this.relatedElements[this.currentImageIndex].dispatchEvent(new Event('changed.' + this.eventNamespace));
|
|
this.relatedElements[this.currentImageIndex].dispatchEvent(new Event((direction === 1 ? 'nextDone' : 'prevDone') + '.' + this.eventNamespace));
|
|
}
|
|
|
|
// history
|
|
if (this.options.history) {
|
|
this.updateURL();
|
|
}
|
|
|
|
if (this.loadedImages.indexOf(this.currentImage.getAttribute('src')) === -1) {
|
|
this.loadedImages.push(this.currentImage.getAttribute('src'));
|
|
}
|
|
|
|
let imageWidth = event.target.width,
|
|
imageHeight = event.target.height;
|
|
|
|
if (this.options.scaleImageToRatio || imageWidth > windowWidth || imageHeight > windowHeight) {
|
|
let ratio = imageWidth / imageHeight > windowWidth / windowHeight ? imageWidth / windowWidth : imageHeight / windowHeight;
|
|
imageWidth /= ratio;
|
|
imageHeight /= ratio;
|
|
}
|
|
|
|
this.domNodes.image.style.top = (window.innerHeight - imageHeight) / 2 + 'px';
|
|
this.domNodes.image.style.left = (window.innerWidth - imageWidth - this.globalScrollbarWidth) / 2 + 'px';
|
|
this.domNodes.image.style.width = imageWidth + 'px';
|
|
this.domNodes.image.style.height = imageHeight + 'px';
|
|
|
|
this.domNodes.spinner.style.display = 'none';
|
|
if( this.options.focus ) {
|
|
this.forceFocus();
|
|
}
|
|
this.fadeIn(this.currentImage, this.options.fadeSpeed, () => {
|
|
if( this.options.focus ) {
|
|
this.domNodes.wrapper.focus();
|
|
}
|
|
});
|
|
|
|
this.isOpen = true;
|
|
|
|
let captionContainer,
|
|
captionText;
|
|
|
|
if (typeof this.options.captionSelector === 'string') {
|
|
captionContainer = this.options.captionSelector === 'self' ? this.relatedElements[this.currentImageIndex] : this.relatedElements[this.currentImageIndex].querySelector(this.options.captionSelector);
|
|
} else if (typeof this.options.captionSelector === 'function') {
|
|
captionContainer = this.options.captionSelector(this.relatedElements[this.currentImageIndex]);
|
|
}
|
|
|
|
if(this.options.captions && captionContainer) {
|
|
if (this.options.captionType === 'data') {
|
|
captionText = captionContainer.dataset[this.options.captionsData];
|
|
} else if (this.options.captionType === 'text') {
|
|
captionText = captionContainer.innerHTML;
|
|
} else {
|
|
captionText = captionContainer.getAttribute(this.options.captionsData);
|
|
}
|
|
}
|
|
|
|
if (!this.options.loop) {
|
|
if (this.currentImageIndex === 0) {
|
|
this.hide(this.domNodes.navigation.querySelector('.sl-prev'));
|
|
}
|
|
if (this.currentImageIndex >= this.relatedElements.length - 1) {
|
|
this.hide(this.domNodes.navigation.querySelector('.sl-next'));
|
|
}
|
|
if (this.currentImageIndex > 0) {
|
|
this.show(this.domNodes.navigation.querySelector('.sl-prev'));
|
|
}
|
|
if (this.currentImageIndex < this.relatedElements.length - 1) {
|
|
this.show(this.domNodes.navigation.querySelector('.sl-next'));
|
|
}
|
|
} else {
|
|
if (this.relatedElements.length === 1) {
|
|
this.hide(this.domNodes.navigation.querySelectorAll('.sl-prev, .sl-next'));
|
|
} else {
|
|
this.show(this.domNodes.navigation.querySelectorAll('.sl-prev, .sl-next'));
|
|
}
|
|
}
|
|
|
|
|
|
if (direction === 1 || direction === -1) {
|
|
if (this.options.animationSlide) {
|
|
this.slide(0, 100 * direction + 'px');
|
|
setTimeout(() => {
|
|
this.slide(this.options.animationSpeed / 1000, 0 + 'px');
|
|
}, 50);
|
|
}
|
|
this.fadeIn(this.domNodes.image, this.options.fadeSpeed, () => {
|
|
this.isAnimating = false;
|
|
this.setCaption(captionText, imageWidth);
|
|
});
|
|
|
|
} else {
|
|
this.isAnimating = false;
|
|
this.setCaption(captionText, imageWidth);
|
|
}
|
|
|
|
if (this.options.additionalHtml && !this.domNodes.additionalHtml) {
|
|
this.domNodes.additionalHtml = document.createElement('div');
|
|
this.domNodes.additionalHtml.classList.add('sl-additional-html');
|
|
this.domNodes.additionalHtml.innerHTML = this.options.additionalHtml;
|
|
this.domNodes.image.appendChild(this.domNodes.additionalHtml);
|
|
}
|
|
|
|
});
|
|
}
|
|
|
|
zoomPanElement(targetOffsetX, targetOffsetY, targetScale) {
|
|
|
|
this.currentImage.style[this.transitionPrefix + 'transform'] = 'translate(' + targetOffsetX + ',' + targetOffsetY + ') scale(' + targetScale + ')';
|
|
|
|
};
|
|
|
|
minMax(value, min, max) {
|
|
return (value < min) ? min : (value > max) ? max : value;
|
|
};
|
|
|
|
setZoomData(initialScale, targetOffsetX, targetOffsetY) {
|
|
this.currentImage.dataset.scale = initialScale;
|
|
this.currentImage.dataset.translateX = targetOffsetX;
|
|
this.currentImage.dataset.translateY = targetOffsetY;
|
|
};
|
|
|
|
|
|
hashchangeHandler() {
|
|
if (this.isOpen && this.hash === this.initialLocationHash) {
|
|
this.hashReseted = true;
|
|
this.close();
|
|
}
|
|
}
|
|
|
|
addEvents() {
|
|
|
|
// resize/responsive
|
|
this.addEventListener(window, 'resize.' + this.eventNamespace, (event) => {
|
|
//this.adjustImage.bind(this)
|
|
if (this.isOpen) {
|
|
this.adjustImage();
|
|
}
|
|
});
|
|
|
|
this.addEventListener(this.domNodes.closeButton, ['click.' + this.eventNamespace, 'touchstart.' + this.eventNamespace], this.close.bind(this));
|
|
|
|
if (this.options.history) {
|
|
setTimeout(() => {
|
|
this.addEventListener(window, 'hashchange.' + this.eventNamespace, (event) => {
|
|
if (this.isOpen) {
|
|
this.hashchangeHandler();
|
|
}
|
|
});
|
|
}, 40);
|
|
}
|
|
|
|
this.addEventListener(this.domNodes.navigation.getElementsByTagName('button'), 'click.' + this.eventNamespace, (event) => {
|
|
if (!event.currentTarget.tagName.match(/button/i)) {
|
|
return true;
|
|
}
|
|
|
|
event.preventDefault();
|
|
this.controlCoordinates.swipeDiff = 0;
|
|
this.loadImage(event.currentTarget.classList.contains('sl-next') ? 1 : -1);
|
|
});
|
|
|
|
if (this.options.scrollZoom) {
|
|
let scale = 1
|
|
|
|
this.addEventListener(this.domNodes.image, ['mousewheel','DOMMouseScroll'], (event) => {
|
|
if (this.controlCoordinates.mousedown || this.isAnimating || this.isClosing || !this.isOpen) {
|
|
return true;
|
|
}
|
|
if(this.controlCoordinates.containerHeight == 0) {
|
|
this.controlCoordinates.containerHeight = this.getDimensions(this.domNodes.image).height;
|
|
this.controlCoordinates.containerWidth = this.getDimensions(this.domNodes.image).width;
|
|
this.controlCoordinates.imgHeight = this.getDimensions(this.currentImage).height;
|
|
this.controlCoordinates.imgWidth = this.getDimensions(this.currentImage).width;
|
|
this.controlCoordinates.containerOffsetX = this.domNodes.image.offsetLeft;
|
|
this.controlCoordinates.containerOffsetY = this.domNodes.image.offsetTop;
|
|
|
|
this.controlCoordinates.initialOffsetX = parseFloat(this.currentImage.dataset.translateX);
|
|
this.controlCoordinates.initialOffsetY = parseFloat(this.currentImage.dataset.translateY);
|
|
}
|
|
event.preventDefault();
|
|
|
|
let delta = event.delta || event.wheelDelta;
|
|
if (delta === undefined) {
|
|
//we are on firefox
|
|
delta = event.detail;
|
|
}
|
|
delta = Math.max(-1,Math.min(1,delta)); // cap the delta to [-1,1] for cross browser consistency
|
|
|
|
// apply zoom
|
|
scale += delta * this.options.scrollZoomFactor * scale;
|
|
scale = Math.max(1, Math.min( this.options.maxZoom, scale));
|
|
|
|
this.controlCoordinates.targetScale = scale;
|
|
|
|
let scrollTopPos = document.documentElement.scrollTop || document.body.scrollTop;
|
|
|
|
this.controlCoordinates.pinchOffsetX = event.pageX;
|
|
this.controlCoordinates.pinchOffsetY = event.pageY - scrollTopPos || 0; // need to substract the scroll position
|
|
|
|
this.controlCoordinates.limitOffsetX = ((this.controlCoordinates.imgWidth * this.controlCoordinates.targetScale) - this.controlCoordinates.containerWidth) / 2;
|
|
this.controlCoordinates.limitOffsetY = ((this.controlCoordinates.imgHeight * this.controlCoordinates.targetScale) - this.controlCoordinates.containerHeight) / 2;
|
|
this.controlCoordinates.scaleDifference = this.controlCoordinates.targetScale - this.controlCoordinates.initialScale;
|
|
this.controlCoordinates.targetOffsetX = (this.controlCoordinates.imgWidth * this.controlCoordinates.targetScale) <= this.controlCoordinates.containerWidth ? 0 : this.minMax(this.controlCoordinates.initialOffsetX - ((((((this.controlCoordinates.pinchOffsetX - this.controlCoordinates.containerOffsetX) - (this.controlCoordinates.containerWidth / 2)) - this.controlCoordinates.initialOffsetX) / (this.controlCoordinates.targetScale - this.controlCoordinates.scaleDifference))) * this.controlCoordinates.scaleDifference), this.controlCoordinates.limitOffsetX * (-1), this.controlCoordinates.limitOffsetX);
|
|
this.controlCoordinates.targetOffsetY = (this.controlCoordinates.imgHeight * this.controlCoordinates.targetScale) <= this.controlCoordinates.containerHeight ? 0 : this.minMax(this.controlCoordinates.initialOffsetY - ((((((this.controlCoordinates.pinchOffsetY - this.controlCoordinates.containerOffsetY) - (this.controlCoordinates.containerHeight / 2)) - this.controlCoordinates.initialOffsetY) / (this.controlCoordinates.targetScale - this.controlCoordinates.scaleDifference))) * this.controlCoordinates.scaleDifference), this.controlCoordinates.limitOffsetY * (-1), this.controlCoordinates.limitOffsetY);
|
|
|
|
this.zoomPanElement(this.controlCoordinates.targetOffsetX + "px", this.controlCoordinates.targetOffsetY + "px", this.controlCoordinates.targetScale);
|
|
|
|
if (this.controlCoordinates.targetScale > 1) {
|
|
this.controlCoordinates.zoomed = true;
|
|
if ( (!this.domNodes.caption.style.opacity || this.domNodes.caption.style.opacity > 0) && this.domNodes.caption.style.display !== 'none') {
|
|
this.fadeOut(this.domNodes.caption, this.options.fadeSpeed);
|
|
}
|
|
} else {
|
|
if (this.controlCoordinates.initialScale === 1) {
|
|
this.controlCoordinates.zoomed = false;
|
|
if (this.domNodes.caption.style.display === 'none') {
|
|
this.fadeIn(this.domNodes.caption, this.options.fadeSpeed);
|
|
}
|
|
}
|
|
this.controlCoordinates.initialPinchDistance = null;
|
|
this.controlCoordinates.capture = false;
|
|
}
|
|
|
|
this.controlCoordinates.initialPinchDistance = this.controlCoordinates.targetPinchDistance;
|
|
this.controlCoordinates.initialScale = this.controlCoordinates.targetScale;
|
|
this.controlCoordinates.initialOffsetX = this.controlCoordinates.targetOffsetX;
|
|
this.controlCoordinates.initialOffsetY = this.controlCoordinates.targetOffsetY;
|
|
|
|
this.setZoomData(this.controlCoordinates.targetScale, this.controlCoordinates.targetOffsetX, this.controlCoordinates.targetOffsetY);
|
|
this.zoomPanElement(this.controlCoordinates.targetOffsetX + "px", this.controlCoordinates.targetOffsetY + "px", this.controlCoordinates.targetScale);
|
|
|
|
});
|
|
}
|
|
|
|
this.addEventListener(this.domNodes.image, ['touchstart.' + this.eventNamespace, 'mousedown.' + this.eventNamespace], (event) => {
|
|
if (event.target.tagName === 'A' && event.type === 'touchstart') {
|
|
return true;
|
|
}
|
|
|
|
if (event.type === 'mousedown') {
|
|
event.preventDefault();
|
|
this.controlCoordinates.initialPointerOffsetX = event.clientX;
|
|
this.controlCoordinates.initialPointerOffsetY = event.clientY;
|
|
this.controlCoordinates.containerHeight = this.getDimensions(this.domNodes.image).height;
|
|
this.controlCoordinates.containerWidth = this.getDimensions(this.domNodes.image).width;
|
|
this.controlCoordinates.imgHeight = this.getDimensions(this.currentImage).height;
|
|
this.controlCoordinates.imgWidth = this.getDimensions(this.currentImage).width;
|
|
this.controlCoordinates.containerOffsetX = this.domNodes.image.offsetLeft;
|
|
this.controlCoordinates.containerOffsetY = this.domNodes.image.offsetTop;
|
|
|
|
this.controlCoordinates.initialOffsetX = parseFloat(this.currentImage.dataset.translateX);
|
|
this.controlCoordinates.initialOffsetY = parseFloat(this.currentImage.dataset.translateY);
|
|
this.controlCoordinates.capture = true;
|
|
} else {
|
|
this.controlCoordinates.touchCount = event.touches.length;
|
|
this.controlCoordinates.initialPointerOffsetX = event.touches[0].clientX;
|
|
this.controlCoordinates.initialPointerOffsetY = event.touches[0].clientY;
|
|
this.controlCoordinates.containerHeight = this.getDimensions(this.domNodes.image).height;
|
|
this.controlCoordinates.containerWidth = this.getDimensions(this.domNodes.image).width;
|
|
this.controlCoordinates.imgHeight = this.getDimensions(this.currentImage).height;
|
|
this.controlCoordinates.imgWidth = this.getDimensions(this.currentImage).width;
|
|
this.controlCoordinates.containerOffsetX = this.domNodes.image.offsetLeft;
|
|
this.controlCoordinates.containerOffsetY = this.domNodes.image.offsetTop;
|
|
|
|
if (this.controlCoordinates.touchCount === 1) /* Single touch */ {
|
|
if (!this.controlCoordinates.doubleTapped) {
|
|
this.controlCoordinates.doubleTapped = true;
|
|
setTimeout(() => {
|
|
this.controlCoordinates.doubleTapped = false;
|
|
}, 300);
|
|
} else {
|
|
|
|
this.currentImage.classList.add('sl-transition');
|
|
if (!this.controlCoordinates.zoomed) {
|
|
this.controlCoordinates.initialScale = this.options.doubleTapZoom;
|
|
this.setZoomData(this.controlCoordinates.initialScale,0, 0);
|
|
this.zoomPanElement(0 + "px", 0 + "px", this.controlCoordinates.initialScale);
|
|
|
|
|
|
if ( (!this.domNodes.caption.style.opacity || this.domNodes.caption.style.opacity > 0) && this.domNodes.caption.style.display !== 'none') {
|
|
this.fadeOut(this.domNodes.caption, this.options.fadeSpeed);
|
|
}
|
|
|
|
this.controlCoordinates.zoomed = true;
|
|
} else {
|
|
this.controlCoordinates.initialScale = 1;
|
|
this.setZoomData(this.controlCoordinates.initialScale,0, 0);
|
|
this.zoomPanElement(0 + "px", 0 + "px", this.controlCoordinates.initialScale);
|
|
this.controlCoordinates.zoomed = false;
|
|
}
|
|
|
|
setTimeout(() => {
|
|
if (this.currentImage) {
|
|
this.currentImage.classList.remove('sl-transition');
|
|
}
|
|
}, 200);
|
|
return false;
|
|
}
|
|
|
|
this.controlCoordinates.initialOffsetX = parseFloat(this.currentImage.dataset.translateX);
|
|
this.controlCoordinates.initialOffsetY = parseFloat(this.currentImage.dataset.translateY);
|
|
}
|
|
else if (this.controlCoordinates.touchCount === 2) /* Pinch */ {
|
|
this.controlCoordinates.initialPointerOffsetX2 = event.touches[1].clientX;
|
|
this.controlCoordinates.initialPointerOffsetY2 = event.touches[1].clientY;
|
|
this.controlCoordinates.initialOffsetX = parseFloat(this.currentImage.dataset.translateX);
|
|
this.controlCoordinates.initialOffsetY = parseFloat(this.currentImage.dataset.translateY);
|
|
this.controlCoordinates.pinchOffsetX = (this.controlCoordinates.initialPointerOffsetX + this.controlCoordinates.initialPointerOffsetX2) / 2;
|
|
this.controlCoordinates.pinchOffsetY = (this.controlCoordinates.initialPointerOffsetY + this.controlCoordinates.initialPointerOffsetY2) / 2;
|
|
this.controlCoordinates.initialPinchDistance = Math.sqrt(((this.controlCoordinates.initialPointerOffsetX - this.controlCoordinates.initialPointerOffsetX2) * (this.controlCoordinates.initialPointerOffsetX - this.controlCoordinates.initialPointerOffsetX2)) + ((this.controlCoordinates.initialPointerOffsetY - this.controlCoordinates.initialPointerOffsetY2) * (this.controlCoordinates.initialPointerOffsetY - this.controlCoordinates.initialPointerOffsetY2)));
|
|
}
|
|
this.controlCoordinates.capture = true;
|
|
}
|
|
if(this.controlCoordinates.mousedown) return true;
|
|
if (this.transitionCapable) {
|
|
this.controlCoordinates.imageLeft = parseInt(this.domNodes.image.style.left, 10);
|
|
}
|
|
this.controlCoordinates.mousedown = true;
|
|
this.controlCoordinates.swipeDiff = 0;
|
|
this.controlCoordinates.swipeYDiff = 0;
|
|
this.controlCoordinates.swipeStart = event.pageX || event.touches[0].pageX;
|
|
this.controlCoordinates.swipeYStart = event.pageY || event.touches[0].pageY;
|
|
|
|
return false;
|
|
});
|
|
|
|
this.addEventListener(this.domNodes.image, ['touchmove.' + this.eventNamespace, 'mousemove.' + this.eventNamespace, 'MSPointerMove'], (event) => {
|
|
|
|
|
|
if (!this.controlCoordinates.mousedown) {
|
|
return true;
|
|
}
|
|
|
|
if (event.type === 'touchmove') {
|
|
if (this.controlCoordinates.capture === false) {
|
|
return false;
|
|
}
|
|
|
|
this.controlCoordinates.pointerOffsetX = event.touches[0].clientX;
|
|
this.controlCoordinates.pointerOffsetY = event.touches[0].clientY;
|
|
this.controlCoordinates.touchCount = event.touches.length;
|
|
this.controlCoordinates.touchmoveCount++;
|
|
|
|
if (this.controlCoordinates.touchCount > 1) /* Pinch */ {
|
|
this.controlCoordinates.pointerOffsetX2 = event.touches[1].clientX;
|
|
this.controlCoordinates.pointerOffsetY2 = event.touches[1].clientY;
|
|
this.controlCoordinates.targetPinchDistance = Math.sqrt(((this.controlCoordinates.pointerOffsetX - this.controlCoordinates.pointerOffsetX2) * (this.controlCoordinates.pointerOffsetX - this.controlCoordinates.pointerOffsetX2)) + ((this.controlCoordinates.pointerOffsetY - this.controlCoordinates.pointerOffsetY2) * (this.controlCoordinates.pointerOffsetY - this.controlCoordinates.pointerOffsetY2)));
|
|
if (this.controlCoordinates.initialPinchDistance === null) {
|
|
this.controlCoordinates.initialPinchDistance = this.controlCoordinates.targetPinchDistance;
|
|
}
|
|
|
|
if (Math.abs(this.controlCoordinates.initialPinchDistance - this.controlCoordinates.targetPinchDistance) >= 1) {
|
|
/* Initialize helpers */
|
|
this.controlCoordinates.targetScale = this.minMax(this.controlCoordinates.targetPinchDistance / this.controlCoordinates.initialPinchDistance * this.controlCoordinates.initialScale, 1, this.options.maxZoom);
|
|
this.controlCoordinates.limitOffsetX = ((this.controlCoordinates.imgWidth * this.controlCoordinates.targetScale) - this.controlCoordinates.containerWidth) / 2;
|
|
this.controlCoordinates.limitOffsetY = ((this.controlCoordinates.imgHeight * this.controlCoordinates.targetScale) - this.controlCoordinates.containerHeight) / 2;
|
|
this.controlCoordinates.scaleDifference = this.controlCoordinates.targetScale - this.controlCoordinates.initialScale;
|
|
this.controlCoordinates.targetOffsetX = (this.controlCoordinates.imgWidth * this.controlCoordinates.targetScale) <= this.controlCoordinates.containerWidth ? 0 : this.minMax(this.controlCoordinates.initialOffsetX - ((((((this.controlCoordinates.pinchOffsetX - this.controlCoordinates.containerOffsetX) - (this.controlCoordinates.containerWidth / 2)) - this.controlCoordinates.initialOffsetX) / (this.controlCoordinates.targetScale - this.controlCoordinates.scaleDifference))) * this.controlCoordinates.scaleDifference), this.controlCoordinates.limitOffsetX * (-1), this.controlCoordinates.limitOffsetX);
|
|
this.controlCoordinates.targetOffsetY = (this.controlCoordinates.imgHeight * this.controlCoordinates.targetScale) <= this.controlCoordinates.containerHeight ? 0 : this.minMax(this.controlCoordinates.initialOffsetY - ((((((this.controlCoordinates.pinchOffsetY - this.controlCoordinates.containerOffsetY) - (this.controlCoordinates.containerHeight / 2)) - this.controlCoordinates.initialOffsetY) / (this.controlCoordinates.targetScale - this.controlCoordinates.scaleDifference))) * this.controlCoordinates.scaleDifference), this.controlCoordinates.limitOffsetY * (-1), this.controlCoordinates.limitOffsetY);
|
|
|
|
this.zoomPanElement(this.controlCoordinates.targetOffsetX + "px", this.controlCoordinates.targetOffsetY + "px", this.controlCoordinates.targetScale);
|
|
|
|
if (this.controlCoordinates.targetScale > 1) {
|
|
this.controlCoordinates.zoomed = true;
|
|
if ((!this.domNodes.caption.style.opacity || this.domNodes.caption.style.opacity > 0) && this.domNodes.caption.style.display !== 'none') {
|
|
this.fadeOut(this.domNodes.caption, this.options.fadeSpeed);
|
|
}
|
|
}
|
|
|
|
this.controlCoordinates.initialPinchDistance = this.controlCoordinates.targetPinchDistance;
|
|
this.controlCoordinates.initialScale = this.controlCoordinates.targetScale;
|
|
this.controlCoordinates.initialOffsetX = this.controlCoordinates.targetOffsetX;
|
|
this.controlCoordinates.initialOffsetY = this.controlCoordinates.targetOffsetY;
|
|
}
|
|
} else {
|
|
this.controlCoordinates.targetScale = this.controlCoordinates.initialScale;
|
|
this.controlCoordinates.limitOffsetX = ((this.controlCoordinates.imgWidth * this.controlCoordinates.targetScale) - this.controlCoordinates.containerWidth) / 2;
|
|
this.controlCoordinates.limitOffsetY = ((this.controlCoordinates.imgHeight * this.controlCoordinates.targetScale) - this.controlCoordinates.containerHeight) / 2;
|
|
this.controlCoordinates.targetOffsetX = (this.controlCoordinates.imgWidth * this.controlCoordinates.targetScale) <= this.controlCoordinates.containerWidth ? 0 : this.minMax(this.controlCoordinates.pointerOffsetX - (this.controlCoordinates.initialPointerOffsetX - this.controlCoordinates.initialOffsetX), this.controlCoordinates.limitOffsetX * (-1), this.controlCoordinates.limitOffsetX);
|
|
this.controlCoordinates.targetOffsetY = (this.controlCoordinates.imgHeight * this.controlCoordinates.targetScale) <= this.controlCoordinates.containerHeight ? 0 : this.minMax(this.controlCoordinates.pointerOffsetY - (this.controlCoordinates.initialPointerOffsetY - this.controlCoordinates.initialOffsetY), this.controlCoordinates.limitOffsetY * (-1), this.controlCoordinates.limitOffsetY);
|
|
|
|
if (Math.abs(this.controlCoordinates.targetOffsetX) === Math.abs(this.controlCoordinates.limitOffsetX)) {
|
|
this.controlCoordinates.initialOffsetX = this.controlCoordinates.targetOffsetX;
|
|
this.controlCoordinates.initialPointerOffsetX = this.controlCoordinates.pointerOffsetX;
|
|
}
|
|
|
|
if (Math.abs(this.controlCoordinates.targetOffsetY) === Math.abs(this.controlCoordinates.limitOffsetY)) {
|
|
this.controlCoordinates.initialOffsetY = this.controlCoordinates.targetOffsetY;
|
|
this.controlCoordinates.initialPointerOffsetY = this.controlCoordinates.pointerOffsetY;
|
|
}
|
|
|
|
this.setZoomData(this.controlCoordinates.initialScale, this.controlCoordinates.targetOffsetX, this.controlCoordinates.targetOffsetY);
|
|
this.zoomPanElement(this.controlCoordinates.targetOffsetX + "px", this.controlCoordinates.targetOffsetY + "px", this.controlCoordinates.targetScale);
|
|
}
|
|
}
|
|
|
|
/* Mouse Move implementation */
|
|
if (event.type === 'mousemove' && this.controlCoordinates.mousedown) {
|
|
if(event.type == 'touchmove') return true;
|
|
|
|
event.preventDefault();
|
|
|
|
if(this.controlCoordinates.capture === false) return false;
|
|
|
|
this.controlCoordinates.pointerOffsetX = event.clientX;
|
|
this.controlCoordinates.pointerOffsetY = event.clientY;
|
|
|
|
this.controlCoordinates.targetScale = this.controlCoordinates.initialScale;
|
|
this.controlCoordinates.limitOffsetX = ((this.controlCoordinates.imgWidth * this.controlCoordinates.targetScale) - this.controlCoordinates.containerWidth) / 2;
|
|
this.controlCoordinates.limitOffsetY = ((this.controlCoordinates.imgHeight * this.controlCoordinates.targetScale) - this.controlCoordinates.containerHeight) / 2;
|
|
this.controlCoordinates.targetOffsetX = (this.controlCoordinates.imgWidth * this.controlCoordinates.targetScale) <= this.controlCoordinates.containerWidth ? 0 : this.minMax(this.controlCoordinates.pointerOffsetX - (this.controlCoordinates.initialPointerOffsetX - this.controlCoordinates.initialOffsetX), this.controlCoordinates.limitOffsetX * (-1), this.controlCoordinates.limitOffsetX);
|
|
this.controlCoordinates.targetOffsetY = (this.controlCoordinates.imgHeight * this.controlCoordinates.targetScale) <= this.controlCoordinates.containerHeight ? 0 : this.minMax(this.controlCoordinates.pointerOffsetY - (this.controlCoordinates.initialPointerOffsetY - this.controlCoordinates.initialOffsetY), this.controlCoordinates.limitOffsetY * (-1), this.controlCoordinates.limitOffsetY);
|
|
|
|
if (Math.abs(this.controlCoordinates.targetOffsetX) === Math.abs(this.controlCoordinates.limitOffsetX)) {
|
|
this.controlCoordinates.initialOffsetX = this.controlCoordinates.targetOffsetX;
|
|
this.controlCoordinates.initialPointerOffsetX = this.controlCoordinates.pointerOffsetX;
|
|
}
|
|
|
|
if (Math.abs(this.controlCoordinates.targetOffsetY) === Math.abs(this.controlCoordinates.limitOffsetY)) {
|
|
this.controlCoordinates.initialOffsetY = this.controlCoordinates.targetOffsetY;
|
|
this.controlCoordinates.initialPointerOffsetY = this.controlCoordinates.pointerOffsetY;
|
|
}
|
|
|
|
this.setZoomData(this.controlCoordinates.initialScale, this.controlCoordinates.targetOffsetX, this.controlCoordinates.targetOffsetY);
|
|
this.zoomPanElement(this.controlCoordinates.targetOffsetX + "px", this.controlCoordinates.targetOffsetY + "px", this.controlCoordinates.targetScale);
|
|
|
|
}
|
|
|
|
if (!this.controlCoordinates.zoomed) {
|
|
|
|
this.controlCoordinates.swipeEnd = event.pageX || event.touches[0].pageX;
|
|
this.controlCoordinates.swipeYEnd = event.pageY || event.touches[0].pageY;
|
|
this.controlCoordinates.swipeDiff = this.controlCoordinates.swipeStart - this.controlCoordinates.swipeEnd;
|
|
this.controlCoordinates.swipeYDiff = this.controlCoordinates.swipeYStart - this.controlCoordinates.swipeYEnd;
|
|
if (this.options.animationSlide) {
|
|
this.slide(0, -this.controlCoordinates.swipeDiff + 'px');
|
|
}
|
|
}
|
|
|
|
});
|
|
|
|
|
|
this.addEventListener(this.domNodes.image, ['touchend.' + this.eventNamespace, 'mouseup.' + this.eventNamespace, 'touchcancel.' + this.eventNamespace, 'mouseleave.' + this.eventNamespace, 'pointerup', 'pointercancel', 'MSPointerUp', 'MSPointerCancel'], (event) => {
|
|
|
|
|
|
if (this.isTouchDevice && event.type === 'touchend') {
|
|
this.controlCoordinates.touchCount = event.touches.length;
|
|
if (this.controlCoordinates.touchCount === 0) /* No touch */ {
|
|
/* Set attributes */
|
|
if (this.currentImage) {
|
|
this.setZoomData(this.controlCoordinates.initialScale, this.controlCoordinates.targetOffsetX, this.controlCoordinates.targetOffsetY);
|
|
}
|
|
if (this.controlCoordinates.initialScale === 1) {
|
|
this.controlCoordinates.zoomed = false;
|
|
if (this.domNodes.caption.style.display === 'none') {
|
|
this.fadeIn(this.domNodes.caption, this.options.fadeSpeed);
|
|
}
|
|
}
|
|
this.controlCoordinates.initialPinchDistance = null;
|
|
this.controlCoordinates.capture = false;
|
|
} else if (this.controlCoordinates.touchCount === 1) /* Single touch */ {
|
|
this.controlCoordinates.initialPointerOffsetX = event.touches[0].clientX;
|
|
this.controlCoordinates.initialPointerOffsetY = event.touches[0].clientY;
|
|
} else if (this.controlCoordinates.touchCount > 1) /* Pinch */ {
|
|
this.controlCoordinates.initialPinchDistance = null;
|
|
}
|
|
}
|
|
|
|
|
|
if (this.controlCoordinates.mousedown) {
|
|
this.controlCoordinates.mousedown = false;
|
|
let possibleDir = true;
|
|
if (!this.options.loop) {
|
|
if (this.currentImageIndex === 0 && this.controlCoordinates.swipeDiff < 0) {
|
|
possibleDir = false;
|
|
}
|
|
if (this.currentImageIndex >= this.relatedElements.length - 1 && this.controlCoordinates.swipeDiff > 0) {
|
|
possibleDir = false;
|
|
}
|
|
}
|
|
if (Math.abs(this.controlCoordinates.swipeDiff) > this.options.swipeTolerance && possibleDir) {
|
|
this.loadImage(this.controlCoordinates.swipeDiff > 0 ? 1 : -1);
|
|
}
|
|
else if (this.options.animationSlide) {
|
|
this.slide(this.options.animationSpeed / 1000, 0 + 'px');
|
|
}
|
|
|
|
if (this.options.swipeClose && Math.abs(this.controlCoordinates.swipeYDiff) > 50 && Math.abs(this.controlCoordinates.swipeDiff) < this.options.swipeTolerance) {
|
|
this.close();
|
|
}
|
|
}
|
|
});
|
|
|
|
this.addEventListener(this.domNodes.image, ['dblclick'], (event) => {
|
|
if(this.isTouchDevice) return;
|
|
this.controlCoordinates.initialPointerOffsetX = event.clientX;
|
|
this.controlCoordinates.initialPointerOffsetY = event.clientY;
|
|
this.controlCoordinates.containerHeight = this.getDimensions(this.domNodes.image).height;
|
|
this.controlCoordinates.containerWidth = this.getDimensions(this.domNodes.image).width;
|
|
this.controlCoordinates.imgHeight = this.getDimensions(this.currentImage).height;
|
|
this.controlCoordinates.imgWidth = this.getDimensions(this.currentImage).width;
|
|
this.controlCoordinates.containerOffsetX = this.domNodes.image.offsetLeft;
|
|
this.controlCoordinates.containerOffsetY = this.domNodes.image.offsetTop;
|
|
|
|
this.currentImage.classList.add('sl-transition');
|
|
|
|
if(!this.controlCoordinates.zoomed) {
|
|
this.controlCoordinates.initialScale = this.options.doubleTapZoom;
|
|
this.setZoomData(this.controlCoordinates.initialScale, 0, 0);
|
|
this.zoomPanElement(0 + "px", 0 + "px", this.controlCoordinates.initialScale);
|
|
if ((!this.domNodes.caption.style.opacity || this.domNodes.caption.style.opacity > 0) && this.domNodes.caption.style.display !== 'none') {
|
|
this.fadeOut(this.domNodes.caption, this.options.fadeSpeed);
|
|
}
|
|
this.controlCoordinates.zoomed = true;
|
|
} else {
|
|
this.controlCoordinates.initialScale = 1;
|
|
this.setZoomData(this.controlCoordinates.initialScale, 0, 0);
|
|
this.zoomPanElement(0 + "px", 0 + "px", this.controlCoordinates.initialScale);
|
|
this.controlCoordinates.zoomed = false;
|
|
if (this.domNodes.caption.style.display === 'none') {
|
|
this.fadeIn(this.domNodes.caption, this.options.fadeSpeed);
|
|
}
|
|
|
|
}
|
|
setTimeout(() => {
|
|
if (this.currentImage) {
|
|
this.currentImage.classList.remove('sl-transition');
|
|
this.currentImage.style[this.transitionPrefix + 'transform-origin'] = null;
|
|
}
|
|
}, 200);
|
|
|
|
this.controlCoordinates.capture = true;
|
|
return false;
|
|
});
|
|
|
|
}
|
|
|
|
getDimensions(element) {
|
|
let styles = window.getComputedStyle(element),
|
|
height = element.offsetHeight,
|
|
width = element.offsetWidth,
|
|
borderTopWidth = parseFloat(styles.borderTopWidth),
|
|
borderBottomWidth = parseFloat(styles.borderBottomWidth),
|
|
paddingTop = parseFloat(styles.paddingTop),
|
|
paddingBottom = parseFloat(styles.paddingBottom),
|
|
borderLeftWidth = parseFloat(styles.borderLeftWidth),
|
|
borderRightWidth = parseFloat(styles.borderRightWidth),
|
|
paddingLeft = parseFloat(styles.paddingLeft),
|
|
paddingRight = parseFloat(styles.paddingRight);
|
|
return {
|
|
height: height - borderBottomWidth - borderTopWidth - paddingTop - paddingBottom,
|
|
width: width - borderLeftWidth - borderRightWidth - paddingLeft - paddingRight
|
|
};
|
|
}
|
|
|
|
updateHash() {
|
|
let newHash = 'pid=' + (this.currentImageIndex + 1),
|
|
newURL = window.location.href.split('#')[0] + '#' + newHash;
|
|
|
|
this.hashReseted = false;
|
|
|
|
if (this.pushStateSupport) {
|
|
window.history[this.historyHasChanges ? 'replaceState' : 'pushState']('', document.title, newURL);
|
|
} else {
|
|
// what is the browser target of this?
|
|
if (this.historyHasChanges) {
|
|
window.location.replace(newURL);
|
|
} else {
|
|
window.location.hash = newHash;
|
|
}
|
|
}
|
|
if(!this.historyHasChanges) {
|
|
this.urlChangedOnce = true;
|
|
}
|
|
|
|
this.historyHasChanges = true;
|
|
}
|
|
|
|
resetHash() {
|
|
this.hashReseted = true;
|
|
if(this.urlChangedOnce) {
|
|
history.back();
|
|
} else {
|
|
if (this.pushStateSupport) {
|
|
history.pushState('', document.title, window.location.pathname + window.location.search);
|
|
} else {
|
|
window.location.hash = '';
|
|
}
|
|
}
|
|
//
|
|
//in case an history operation is still pending
|
|
clearTimeout(this.historyUpdateTimeout);
|
|
}
|
|
|
|
updateURL() {
|
|
clearTimeout(this.historyUpdateTimeout);
|
|
if (!this.historyHasChanges) {
|
|
this.updateHash(); // first time
|
|
} else {
|
|
this.historyUpdateTimeout = setTimeout(this.updateHash.bind(this), 800);
|
|
}
|
|
}
|
|
|
|
setCaption(captionText, imageWidth) {
|
|
if (this.options.captions && captionText && captionText !== '' && typeof captionText !== "undefined") {
|
|
this.hide(this.domNodes.caption);
|
|
this.domNodes.caption.style.width = imageWidth + 'px';
|
|
this.domNodes.caption.innerHTML = captionText;
|
|
|
|
this.domNodes.image.appendChild(this.domNodes.caption);
|
|
|
|
setTimeout(() => {
|
|
this.fadeIn(this.domNodes.caption, this.options.fadeSpeed);
|
|
}, this.options.captionDelay);
|
|
}
|
|
}
|
|
|
|
slide(speed, pos) {
|
|
if (!this.transitionCapable) {
|
|
return this.domNodes.image.style.left = pos;
|
|
}
|
|
|
|
this.domNodes.image.style[this.transitionPrefix + 'transform'] = 'translateX(' + pos + ')';
|
|
this.domNodes.image.style[this.transitionPrefix + 'transition'] = this.transitionPrefix + 'transform ' + speed + 's linear';
|
|
}
|
|
|
|
getRelated(rel) {
|
|
let elems;
|
|
if (rel && rel !== false && rel !== 'nofollow') {
|
|
elems = Array.from(this.elements).filter(element => element.getAttribute('rel') === rel);
|
|
} else {
|
|
elems = this.elements;
|
|
}
|
|
return elems;
|
|
}
|
|
|
|
openImage(element) {
|
|
element.dispatchEvent(new Event('show.' + this.eventNamespace));
|
|
|
|
if (this.options.disableScroll) {
|
|
this.globalScrollbarWidth = this.toggleScrollbar('hide');
|
|
}
|
|
|
|
if (this.options.htmlClass && this.options.htmlClass !== '') {
|
|
document.querySelector('html').classList.add(this.options.htmlClass);
|
|
}
|
|
|
|
document.body.appendChild(this.domNodes.wrapper);
|
|
|
|
this.domNodes.wrapper.appendChild(this.domNodes.image);
|
|
if (this.options.overlay) {
|
|
document.body.appendChild(this.domNodes.overlay);
|
|
}
|
|
|
|
this.relatedElements = this.getRelated(element.rel);
|
|
|
|
if (this.options.showCounter) {
|
|
if (this.relatedElements.length == 1 && this.domNodes.wrapper.contains(this.domNodes.counter)) {
|
|
this.domNodes.wrapper.removeChild(this.domNodes.counter);
|
|
} else if(this.relatedElements.length > 1 && !this.domNodes.wrapper.contains(this.domNodes.counter)) {
|
|
this.domNodes.wrapper.appendChild(this.domNodes.counter);
|
|
}
|
|
}
|
|
|
|
this.isAnimating = true;
|
|
|
|
this.currentImageIndex = this.relatedElements.indexOf(element);
|
|
|
|
let targetURL = element.getAttribute(this.options.sourceAttr);
|
|
|
|
this.currentImage = document.createElement('img');
|
|
this.currentImage.style.display = 'none';
|
|
this.currentImage.setAttribute('src', targetURL);
|
|
this.currentImage.dataset.scale = 1;
|
|
this.currentImage.dataset.translateX = 0;
|
|
this.currentImage.dataset.translateY = 0;
|
|
|
|
if (this.loadedImages.indexOf(targetURL) === -1) {
|
|
this.loadedImages.push(targetURL);
|
|
}
|
|
|
|
this.domNodes.image.innerHTML = '';
|
|
this.domNodes.image.setAttribute('style', '');
|
|
|
|
this.domNodes.image.appendChild(this.currentImage);
|
|
|
|
|
|
this.fadeIn(this.domNodes.overlay, this.options.fadeSpeed);
|
|
this.fadeIn([this.domNodes.counter, this.domNodes.navigation, this.domNodes.closeButton], this.options.fadeSpeed);
|
|
|
|
this.show(this.domNodes.spinner);
|
|
this.domNodes.counter.querySelector('.sl-current').innerHTML = this.currentImageIndex + 1;
|
|
this.domNodes.counter.querySelector('.sl-total').innerHTML = this.relatedElements.length;
|
|
|
|
this.adjustImage();
|
|
if (this.options.preloading) {
|
|
this.preload();
|
|
}
|
|
|
|
setTimeout(() => {
|
|
element.dispatchEvent(new Event('shown.' + this.eventNamespace));
|
|
}, this.options.animationSpeed);
|
|
}
|
|
|
|
forceFocus() {
|
|
this.removeEventListener(document, 'focusin.' + this.eventNamespace);
|
|
this.addEventListener(document, 'focusin.' + this.eventNamespace, event => {
|
|
if (document !== event.target &&
|
|
this.domNodes.wrapper !== event.target &&
|
|
!this.domNodes.wrapper.contains(event.target)) {
|
|
this.domNodes.wrapper.focus();
|
|
}
|
|
});
|
|
}
|
|
|
|
// utility
|
|
addEventListener(elements, events, callback, opts) {
|
|
elements = this.wrap(elements);
|
|
events = this.wrap(events);
|
|
|
|
for (let element of elements) {
|
|
if (!element.namespaces) {
|
|
element.namespaces = {};
|
|
} // save the namespaces addEventListener the DOM element itself
|
|
|
|
for (let event of events) {
|
|
let options = opts || false;
|
|
let needsPassiveFix = ['touchstart', 'touchmove'].indexOf(event.split('.')[0]) >= 0;
|
|
if (needsPassiveFix && this.isPassiveEventsSupported) {
|
|
if (typeof options === 'object') {
|
|
options.passive = true;
|
|
} else {
|
|
options = {passive: true};
|
|
}
|
|
}
|
|
element.namespaces[event] = callback;
|
|
element.addEventListener(event.split('.')[0], callback, options);
|
|
}
|
|
}
|
|
}
|
|
|
|
removeEventListener(elements, events) {
|
|
elements = this.wrap(elements);
|
|
events = this.wrap(events);
|
|
for (let element of elements) {
|
|
for (let event of events) {
|
|
if(element.namespaces && element.namespaces[event]) {
|
|
element.removeEventListener(event.split('.')[0], element.namespaces[event]);
|
|
delete element.namespaces[event];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fadeOut(elements, duration, callback) {
|
|
elements = this.wrap(elements);
|
|
for (let element of elements) {
|
|
element.style.opacity = parseFloat(element) || window.getComputedStyle(element).getPropertyValue("opacity");
|
|
}
|
|
|
|
this.isFadeIn = false;
|
|
|
|
let step = 16.66666 / (duration || this.options.fadeSpeed),
|
|
fade = () => {
|
|
let currentOpacity = parseFloat(elements[0].style.opacity);
|
|
if ((currentOpacity -= step) < 0) {
|
|
for (let element of elements) {
|
|
element.style.display = "none";
|
|
// element.style.opacity = '';
|
|
element.style.opacity = 1;
|
|
}
|
|
callback && callback.call(this, elements);
|
|
} else {
|
|
for (let element of elements) {
|
|
element.style.opacity = currentOpacity;
|
|
}
|
|
requestAnimationFrame(fade);
|
|
}
|
|
};
|
|
|
|
fade();
|
|
}
|
|
|
|
fadeIn(elements, duration, callback, display) {
|
|
elements = this.wrap(elements);
|
|
for (let element of elements) {
|
|
element.style.opacity = 0;
|
|
element.style.display = display || "block";
|
|
}
|
|
|
|
this.isFadeIn = true;
|
|
|
|
let opacityTarget = parseFloat(elements[0].dataset.opacityTarget || 1),
|
|
step = (16.66666 * opacityTarget) / (duration || this.options.fadeSpeed),
|
|
fade = () => {
|
|
let currentOpacity = parseFloat(elements[0].style.opacity);
|
|
if (!((currentOpacity += step) > opacityTarget)) {
|
|
for (let element of elements) {
|
|
element.style.opacity = currentOpacity;
|
|
}
|
|
if(!this.isFadeIn) return;
|
|
requestAnimationFrame(fade);
|
|
} else {
|
|
for (let element of elements) {
|
|
element.style.opacity = opacityTarget;
|
|
}
|
|
callback && callback.call(this, elements);
|
|
}
|
|
};
|
|
|
|
fade();
|
|
}
|
|
|
|
hide(elements) {
|
|
elements = this.wrap(elements);
|
|
for (let element of elements) {
|
|
if(element.style.display != 'none') {
|
|
element.dataset.initialDisplay = element.style.display;
|
|
}
|
|
element.style.display = 'none';
|
|
}
|
|
}
|
|
|
|
show(elements, display) {
|
|
elements = this.wrap(elements);
|
|
for (let element of elements) {
|
|
element.style.display = element.dataset.initialDisplay || display || 'block';
|
|
}
|
|
}
|
|
|
|
wrap(input) {
|
|
return typeof input[Symbol.iterator] === 'function' && typeof input !== 'string' ? input : [input];
|
|
}
|
|
|
|
on(events, callback) {
|
|
events = this.wrap(events);
|
|
for (let element of this.elements) {
|
|
if (!element.fullyNamespacedEvents) {
|
|
element.fullyNamespacedEvents = {};
|
|
}
|
|
for (let event of events) {
|
|
element.fullyNamespacedEvents[event] = callback;
|
|
element.addEventListener(event, callback);
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
|
|
off(events) {
|
|
events = this.wrap(events);
|
|
for (let element of this.elements) {
|
|
for (let event of events) {
|
|
if (typeof element.fullyNamespacedEvents !== 'undefined' && event in element.fullyNamespacedEvents) {
|
|
element.removeEventListener(event, element.fullyNamespacedEvents[event]);
|
|
}
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
|
|
// api
|
|
|
|
open(elem) {
|
|
elem = elem || this.elements[0];
|
|
if(typeof jQuery !== "undefined" && elem instanceof jQuery) {
|
|
elem = elem.get(0);
|
|
}
|
|
this.initialImageIndex = this.elements.indexOf(elem);
|
|
if(this.initialImageIndex > -1) {
|
|
this.openImage(elem);
|
|
}
|
|
}
|
|
|
|
next() {
|
|
this.loadImage(1);
|
|
}
|
|
|
|
prev() {
|
|
this.loadImage(-1);
|
|
}
|
|
|
|
// get some useful data
|
|
getLighboxData() {
|
|
return {
|
|
currentImageIndex: this.currentImageIndex,
|
|
currentImage: this.currentImage,
|
|
globalScrollbarWidth: this.globalScrollbarWidth
|
|
};
|
|
}
|
|
|
|
//close is exposed anyways..
|
|
|
|
destroy() {
|
|
//remove all custom event listeners from elements
|
|
this.off([
|
|
'close.' + this.eventNamespace,
|
|
'closed.' + this.eventNamespace,
|
|
'nextImageLoaded.' + this.eventNamespace,
|
|
'prevImageLoaded.' + this.eventNamespace,
|
|
'change.' + this.eventNamespace,
|
|
'nextDone.' + this.eventNamespace,
|
|
'prevDone.' + this.eventNamespace,
|
|
'error.' + this.eventNamespace,
|
|
'changed.' + this.eventNamespace,
|
|
'next.' + this.eventNamespace,
|
|
'prev.' + this.eventNamespace,
|
|
'show.' + this.eventNamespace,
|
|
'shown.' + this.eventNamespace
|
|
]);
|
|
|
|
this.removeEventListener(this.elements, 'click.' + this.eventNamespace);
|
|
this.removeEventListener(document, 'focusin.' + this.eventNamespace);
|
|
this.removeEventListener(document.body, 'contextmenu.' + this.eventNamespace);
|
|
this.removeEventListener(document.body, 'keyup.' + this.eventNamespace);
|
|
|
|
this.removeEventListener(this.domNodes.navigation.getElementsByTagName('button'), 'click.' + this.eventNamespace);
|
|
this.removeEventListener(this.domNodes.closeButton, 'click.' + this.eventNamespace);
|
|
this.removeEventListener(window, 'resize.' + this.eventNamespace);
|
|
this.removeEventListener(window, 'hashchange.' + this.eventNamespace);
|
|
|
|
this.close();
|
|
if (this.isOpen) {
|
|
document.body.removeChild(this.domNodes.wrapper);
|
|
document.body.removeChild(this.domNodes.overlay);
|
|
}
|
|
|
|
this.elements = null;
|
|
}
|
|
|
|
refresh() {
|
|
if (!this.initialSelector) {
|
|
throw 'refreshing only works when you initialize using a selector!';
|
|
}
|
|
|
|
let options = this.options,
|
|
selector = this.initialSelector;
|
|
|
|
this.destroy();
|
|
|
|
this.constructor(selector, options);
|
|
|
|
return this;
|
|
}
|
|
}
|
|
export default SimpleLightbox;
|
|
|
|
global.SimpleLightbox = SimpleLightbox; |