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import './collapse-markdown-sections.css';
import delegate from 'delegate-it';
import * as pageDetect from 'github-url-detection';
import features from '.';
function onHeadingClick(event: delegate.Event<MouseEvent, HTMLElement>): void {
// Don't toggle the section if the title text is being selected instead of clicked
if (document.getSelection()?.type === 'Range') {
return;
}
// Don't toggle the section if a link in the heading is clicked (either the content or the anchor)
if ((event.target as HTMLElement).closest('a, details')) {
return;
}
const sectionHeading = event.delegateTarget;
const isSectionHidden = sectionHeading.classList.toggle('rgh-markdown-section-collapsed');
let element = sectionHeading.tagName === 'H1' ?
sectionHeading.parentElement!.firstElementChild as HTMLElement :
sectionHeading.nextElementSibling as HTMLElement;
while (element) {
if (/^H\d$/.test(element.tagName)) {
if (sectionHeading.tagName !== 'H1' && element.tagName <= sectionHeading.tagName) {
return;
}
element.classList.toggle('rgh-markdown-section-collapsed', isSectionHidden);
} else {
element.hidden = isSectionHidden;
}
element = element.nextElementSibling as HTMLElement;
}
}
function init(): void {
delegate(document, '.markdown-body > :is(h1, h2, h3, h4, h5, h6)', 'click', onHeadingClick);
document.body.classList.add('rgh-' + __filebasename);
}
void features.add(__filebasename, {
include: [
pageDetect.isRepoTree,
pageDetect.isRepoWiki,
() => pageDetect.isSingleFile() && location.pathname.endsWith('.md')
],
init
});
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