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import Overlay from './overlay.js';
import Shadow from './shadow.js';
export default class LightBox {
currentImage = null;
shadows = {};
/**
* ============
* Initializers
* ============
*/
constructor({ container }) {
this.container = container;
this.initOverlay();
this.initImages();
this.initControls();
}
initOverlay() {
this.overlay = new Overlay();
this.overlay.element.addEventListener('click', e => {
this.closeCurrent();
});
}
initImages() {
this.images = document.querySelectorAll(`${this.container} img[data-libo]`);
function wrapInLink(image) {
// wrap image with a link if it's not already wrapped
const parent = image.parentElement;
let link;
if (!parent || parent.tagName !== 'A') {
link = document.createElement('a');
link.href = image.src;
// replace image with the linked one
parent.insertBefore(link, image);
link.appendChild(image);
} else {
link = parent;
}
return link;
}
this.images.forEach(image => {
// generate unique id for each image
image.id = crypto.randomUUID();
// make sure every image has a link
const link = wrapInLink(image);
// click link to open lightbox
link.addEventListener('click', e => {
e.preventDefault();
this.openLightBox(image);
});
});
}
initControls() {
// keyboard shortcuts
document.addEventListener('keydown', e => {
if (e.key === 'Escape' || e.key === ' ') {
this.closeCurrent();
}
});
// scroll to dismiss
document.body.addEventListener('wheel', e => {
this.closeCurrent();
});
}
/**
* ============
* Actions
* ============
*/
openLightBox(image) {
// hide and store original image
image.style.visibility = 'hidden';
this.currentImage = image;
// get shadow of this image
const shadow = this.shadows[image.id] || new Shadow(image);
if (!this.shadows[image.id]) {
this.shadows[image.id] = shadow;
}
// place and open shadow
if (!document.body.contains(shadow.element)) shadow.placeItself();
shadow.open();
this.overlay.show();
}
closeLightBox(image) {
// show and unstore original image
image.style.visibility = 'visible';
this.currentImage = null;
// close shadow
const shadow = this.shadows[image.id];
if (!shadow) return;
shadow.close();
this.overlay.hide();
}
closeCurrent() {
if (!this.currentImage) return;
this.closeLightBox(this.currentImage);
}
closeAll() {
this.images.forEach(image => {
this.closeLightBox(image);
});
this.overlay.hide();
}
}
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