gitlab-org--gitlab-foss/app/assets/javascripts/pager.js

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import { getParameterByName } from '~/lib/utils/common_utils';
import '~/lib/utils/url_utility';
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(() => {
const ENDLESS_SCROLL_BOTTOM_PX = 400;
const ENDLESS_SCROLL_FIRE_DELAY_MS = 1000;
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const Pager = {
init(limit = 0, preload = false, disable = false, prepareData = $.noop, callback = $.noop) {
this.url = $('.content_list').data('href') || gl.utils.removeParams(['limit', 'offset']);
this.limit = limit;
this.offset = parseInt(getParameterByName('offset'), 10) || this.limit;
this.disable = disable;
this.prepareData = prepareData;
this.callback = callback;
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this.loading = $('.loading').first();
if (preload) {
this.offset = 0;
this.getOld();
}
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this.initLoadMore();
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},
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getOld() {
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this.loading.show();
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$.ajax({
type: 'GET',
url: this.url,
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data: `limit=${this.limit}&offset=${this.offset}`,
dataType: 'json',
error: () => this.loading.hide(),
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success: (data) => {
this.append(data.count, this.prepareData(data.html));
this.callback();
// keep loading until we've filled the viewport height
if (!this.disable && !this.isScrollable()) {
this.getOld();
} else {
this.loading.hide();
}
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},
});
},
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append(count, html) {
$('.content_list').append(html);
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if (count > 0) {
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this.offset += count;
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} else {
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this.disable = true;
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}
},
isScrollable() {
const $w = $(window);
return $(document).height() > $w.height() + $w.scrollTop() + ENDLESS_SCROLL_BOTTOM_PX;
},
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initLoadMore() {
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$(document).unbind('scroll');
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$(document).endlessScroll({
bottomPixels: ENDLESS_SCROLL_BOTTOM_PX,
fireDelay: ENDLESS_SCROLL_FIRE_DELAY_MS,
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fireOnce: true,
ceaseFire: () => this.disable === true,
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callback: () => {
if (!this.loading.is(':visible')) {
this.loading.show();
this.getOld();
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}
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},
});
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},
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};
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window.Pager = Pager;
})();