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import './sticky-sidebar.css';
import select from 'select-dom';
import debounce from 'debounce-fn';
import {observe} from 'selector-observer';
import * as pageDetect from 'github-url-detection';
import features from '.';
const deinit: VoidFunction[] = [];
// Both selectors are present on conversation pages so we need to discriminate
const sidebarSelector = pageDetect.isRepoRoot() ? '.repository-content .flex-column > .flex-shrink-0 > [data-pjax]' : '#partial-discussion-sidebar';
function updateStickiness(): void {
const sidebar = select(sidebarSelector)!;
const margin = pageDetect.isConversation() ? 60 : 0; // 60 matches sticky header's height
sidebar.classList.toggle('rgh-sticky-sidebar', sidebar.offsetHeight + margin < window.innerHeight);
}
const onResize = debounce(updateStickiness, {wait: 100});
function init(): void {
const resizeObserver = new ResizeObserver(onResize);
const selectObserver = observe(sidebarSelector, {
add(sidebar) {
resizeObserver.observe(sidebar, {box: 'border-box'});
},
});
window.addEventListener('resize', onResize);
deinit.push(() => {
selectObserver.abort();
resizeObserver.disconnect();
window.removeEventListener('resize', onResize);
});
}
void features.add(__filebasename, {
include: [
pageDetect.isRepoRoot,
pageDetect.isConversation,
],
exclude: [
pageDetect.isEmptyRepoRoot,
],
deduplicate: 'has-rgh-inner',
init,
deinit,
});
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