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import * as sfw from 'sfw';
const { Div, Img } = sfw.element.native;
import Month from '../../month.js';
import Image from '../../widgets/image/index.js';
const css = await sfw.css(import.meta.url, './index.css')
export default class ImageViewer extends sfw.element.Container {
#container
#subtitle
#images
#current_month
constructor() {
super({ css });
this.#current_month = null;
this.#images = [];
this.body.append(
this.#container = Div.new({
id: 'container',
onscroll: () => this.preload_all(),
children: [
this.#subtitle = Div.new({
id: 'subtitle',
innerHTML: 'Powered by <i>Memora<i>'
})
],
})
);
}
add(metadata) {
const month = Month.from_unix(metadata.timestamp);
if (month != this.#current_month && !(month?.is_same(this.#current_month))) {
const content = month == null ? 'No Date' : `${month.name} ${month.year}`;
this.#current_month = month;
const title = Div.new({
id: 'date',
innerText: content,
})
this.#container.insertBefore(title, this.#subtitle);
}
const image = Image.new({ metadata });
this.#images.push(image);
this.#container.insertBefore(image, this.#subtitle);
}
clear() {
this.#container.innerHTML = '';
this.#container.append(this.#subtitle);
}
jump_to(month) {
const image = this.#images.find(i => i.month == month || i.month.is_same(month));
image.scrollIntoView({ behavior: 'instant' })
}
preload_all() {
this.#images.forEach(image => this.#preload(image))
}
#preload(image) {
const loading_zone_after = (this.#container.scrollTop + this.#container.offsetHeight) * 2;
const loading_zone_before = this.#container.scrollTop - (this.#container.offsetHeight - image.offsetHeight) * 2;
if (loading_zone_before < image.offsetTop && image.offsetTop < loading_zone_after) {
image.load();
}
}
}
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