mirror of
https://github.com/StarCitizenTools/mediawiki-skins-Citizen.git
synced 2024-11-24 22:35:45 +00:00
95 lines
2.8 KiB
JavaScript
95 lines
2.8 KiB
JavaScript
const ACTIVE_SECTION_CLASS = 'citizen-toc__listItem--active';
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let /** @type {HTMLElement | undefined} */ activeSection;
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/**
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* Escapes double quotes in the given HTML attribute ID.
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*
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* @param {string} id - The HTML attribute ID to escape double quotes from.
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* @return {string} The escaped HTML attribute ID with double quotes replaced.
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*/
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function escapeHtmlAttributeQuotes( id ) {
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// Escapes double quotes in the given id
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return id.replace( /"/g, '\\"' );
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}
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/**
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* Finds a link element in the table of contents (TOC) based on the provided ID.
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*
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* @param {Element} toc - The table of contents element to search within.
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* @param {string} id - The ID of the section to find the link for.
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* @return {Element|null} The link element corresponding to the provided ID, or null if not found.
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*/
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function findLinkById( toc, id ) {
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const sanitizedId = escapeHtmlAttributeQuotes( id );
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const linkElement = toc.querySelector( `a[href="#${ sanitizedId }"]` );
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return linkElement;
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}
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/**
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* Changes the active section in the table of contents based on the provided ID.
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*
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* @param {HTMLElement} toc - The Table of Content HTML element
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* @param {string} id - The ID of the section to make active.
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* @return {void}
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*/
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function changeActiveSection( toc, id ) {
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const link = findLinkById( toc, id );
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if ( activeSection ) {
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activeSection.classList.remove( ACTIVE_SECTION_CLASS );
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activeSection = undefined;
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}
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if ( link ) {
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activeSection = link.parentNode;
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activeSection.classList.add( ACTIVE_SECTION_CLASS );
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}
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}
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/**
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* Toggle active HTML class to items in table of content based on user viewport.
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* Based on Vector
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*
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* @param {HTMLElement} bodyContent
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* @return {void}
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*/
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function init( bodyContent ) {
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const toc = document.getElementById( 'mw-panel-toc' );
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if ( !toc ) {
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return;
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}
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const extractIds = () => Array.from( toc.querySelectorAll( '.citizen-toc__listItem' ) )
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.map( ( tocListEl ) => tocListEl.id.slice( 4 ) );
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const queryElements = ( ids ) => ids.map( ( id ) => bodyContent.querySelector( '#' + CSS.escape( id ) ) )
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.filter( ( element ) => element !== null && element !== undefined );
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const headlines = queryElements( extractIds() );
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const computedStyle = window.getComputedStyle( document.documentElement );
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const scrollPaddingTop = computedStyle.getPropertyValue( 'scroll-padding-top' );
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const topMargin = Number( scrollPaddingTop.slice( 0, -2 ) ) + 20;
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const getTopMargin = () => topMargin;
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const initSectionObserver = require( './sectionObserver.js' ).init;
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const sectionObserver = initSectionObserver( {
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elements: headlines,
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topMargin: getTopMargin(),
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onIntersection: ( section ) => {
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if ( section.id && section.id.trim() !== '' ) {
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changeActiveSection( toc, section.id );
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}
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}
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} );
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sectionObserver.resume();
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}
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module.exports = {
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init: init
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};
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