mirror of
https://github.com/StarCitizenTools/mediawiki-extensions-TabberNeue.git
synced 2024-12-04 21:08:06 +00:00
673 lines
20 KiB
JavaScript
673 lines
20 KiB
JavaScript
/**
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* ext.tabberNeue
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*
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* NAMING THINGS ARE HARD :(
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* TODO: Make class and function names more accurate?
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* TODO: Split classes into different modules
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*/
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const config = require( './config.json' );
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const Hash = require( './Hash.js' );
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const Transclude = require( './Transclude.js' );
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const Util = require( './Util.js' );
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let resizeObserver;
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/**
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* Class representing TabberAction functionality for handling tab events and animations.
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*
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* @class
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*/
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class TabberAction {
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/**
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* Determines if animations should be shown based on the user's preference.
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*
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* @return {boolean} - Returns true if animations should be shown, false otherwise.
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*/
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static shouldShowAnimation() {
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return (
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!window.matchMedia( '(prefers-reduced-motion: reduce)' ).matches ||
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!config.enableAnimation
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);
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}
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/**
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* Toggles the animation state based on the user's preference.
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* If animations should be shown,
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* adds the 'tabber-animations-ready' class to the document element.
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*
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* @param {boolean} enableAnimations - Flag indicating whether animations should be enabled.
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*/
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static toggleAnimation( enableAnimations ) {
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if ( !TabberAction.shouldShowAnimation() ) {
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return;
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}
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window.requestAnimationFrame( () => {
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document.documentElement.classList.toggle(
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'tabber-animations-ready',
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enableAnimations
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);
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} );
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}
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/**
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* Updates the header overflow based on the scroll position of the tab list.
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* If the tab list is scrollable, it adds/removes classes to show/hide navigation buttons.
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*
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* @param {Element} tabberEl - The tabber element containing the header and tab list.
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*/
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static updateHeaderOverflow( tabberEl ) {
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const header = tabberEl.querySelector( ':scope > .tabber__header' );
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const tablist = header.querySelector( ':scope > .tabber__tabs' );
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const { roundScrollLeft } = Util;
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const tablistWidth = tablist.offsetWidth;
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const tablistScrollWidth = tablist.scrollWidth;
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const isScrollable = tablistScrollWidth > tablistWidth;
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if ( !isScrollable ) {
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window.requestAnimationFrame( () => {
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header.classList.remove( 'tabber__header--next-visible' );
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header.classList.remove( 'tabber__header--prev-visible' );
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} );
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return;
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}
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const scrollLeft = roundScrollLeft( tablist.scrollLeft );
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const isAtStart = scrollLeft <= 0;
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const isAtEnd = scrollLeft + tablistWidth >= tablistScrollWidth;
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const isAtMiddle = !isAtStart && !isAtEnd;
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window.requestAnimationFrame( () => {
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header.classList.toggle(
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'tabber__header--next-visible',
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isAtStart || isAtMiddle
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);
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header.classList.toggle(
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'tabber__header--prev-visible',
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isAtEnd || isAtMiddle
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);
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} );
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}
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/**
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* Animate and update the indicator position and width based on the active tab.
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*
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* @param {Element} indicator - The indicator element (optional, defaults to the first '.tabber__indicator' found in the parent).
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* @param {Element} activeTab - The currently active tab.
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* @param {Element} tablist - The parent element containing the tabs.
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*/
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static animateIndicator( indicator, activeTab, tablist ) {
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const tablistScrollLeft = Util.roundScrollLeft( tablist.scrollLeft );
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const width = Util.getElementSize( activeTab, 'width' );
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const transformValue = activeTab.offsetLeft - tablistScrollLeft;
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window.requestAnimationFrame( () => {
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indicator.classList.add( 'tabber__indicator--visible' );
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tablist.classList.add( 'tabber__tabs--animate' );
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indicator.style.width = width + 'px';
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indicator.style.transform = `translateX(${ transformValue }px)`;
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setTimeout( () => {
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indicator.classList.remove( 'tabber__indicator--visible' );
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tablist.classList.remove( 'tabber__tabs--animate' );
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}, 250 );
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} );
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}
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/**
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* Sets the active tab panel in the tabber element.
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* Loads the content of the active tab panel if it has a 'data-mw-tabber-load-url' attribute.
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* Adjusts the height of the section containing the active tab panel based on its content height.
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* Scrolls the section to make the active tab panel visible.
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*
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* @param {Element} activeTabpanel - The active tab panel element to be set.
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*/
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static setActiveTabpanel( activeTabpanel ) {
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const section = activeTabpanel.closest( '.tabber__section' );
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if ( activeTabpanel.dataset.mwTabberLoadUrl ) {
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const transclude = new Transclude( activeTabpanel );
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transclude.loadPage();
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}
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window.requestAnimationFrame( () => {
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const activeTabpanelHeight = Util.getElementSize(
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activeTabpanel,
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'height'
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);
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section.style.height = activeTabpanelHeight + 'px';
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// Scroll to tab
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section.scrollLeft = activeTabpanel.offsetLeft;
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} );
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}
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/**
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* Sets the active tab in the tabber element.
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* Updates the visibility and attributes of tab panels and tabs based on the active tab.
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*
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* @param {Element} activeTab - The active tab element to be set.
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*/
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static setActiveTab( activeTab ) {
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const activeTabpanel = document.getElementById( activeTab.getAttribute( 'aria-controls' ) );
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const tabberEl = activeTabpanel.closest( '.tabber' );
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const indicator = tabberEl.querySelector( ':scope > .tabber__header > .tabber__indicator' );
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const tabpanels = tabberEl.querySelectorAll(
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':scope > .tabber__section > .tabber__panel'
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);
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const tabs = tabberEl.querySelectorAll(
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':scope > .tabber__header > .tabber__tabs > .tabber__tab'
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);
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const tabStateUpdates = [];
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const tabpanelVisibilityUpdates = [];
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tabpanels.forEach( ( tabpanel ) => {
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if ( tabpanel === activeTabpanel ) {
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tabpanelVisibilityUpdates.push( {
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element: tabpanel,
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attributes: {
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'aria-hidden': 'false'
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}
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} );
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if ( typeof resizeObserver !== 'undefined' && resizeObserver ) {
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resizeObserver.observe( activeTabpanel );
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}
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} else {
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tabpanelVisibilityUpdates.push( {
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element: tabpanel,
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attributes: {
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'aria-hidden': 'true'
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}
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} );
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if ( typeof resizeObserver !== 'undefined' && resizeObserver ) {
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resizeObserver.unobserve( tabpanel );
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}
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}
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} );
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tabs.forEach( ( tab ) => {
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if ( tab === activeTab ) {
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tabStateUpdates.push( {
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element: tab,
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attributes: {
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'aria-selected': true,
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tabindex: '0'
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}
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} );
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} else {
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tabStateUpdates.push( {
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element: tab,
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attributes: {
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'aria-selected': false,
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tabindex: '-1'
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}
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} );
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}
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} );
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window.requestAnimationFrame( () => {
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tabpanelVisibilityUpdates.forEach( ( { element, attributes } ) => {
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Util.setAttributes( element, attributes );
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} );
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tabStateUpdates.forEach( ( { element, attributes } ) => {
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Util.setAttributes( element, attributes );
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} );
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TabberAction.animateIndicator( indicator, activeTab, activeTab.parentElement );
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TabberAction.setActiveTabpanel( activeTabpanel );
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} );
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}
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/**
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* Scrolls the tab list by the specified offset.
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*
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* @param {number} offset - The amount to scroll the tab list by.
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* @param {Element} tablist - The tab list element to scroll.
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*/
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static scrollTablist( offset, tablist ) {
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const scrollLeft = Util.roundScrollLeft( tablist.scrollLeft ) + offset;
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window.requestAnimationFrame( () => {
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tablist.scrollLeft = Math.min(
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Math.max( scrollLeft, 0 ),
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tablist.scrollWidth - tablist.offsetWidth
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);
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} );
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}
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/**
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* Handles the click event on a header button element.
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* Calculates the scroll offset based on the button type ('prev' or 'next').
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* Scrolls the tab list by the calculated offset using the 'scrollTablist' method
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* of the TabberAction class.
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*
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* @param {Element} button - The header button element that was clicked.
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* @param {string} type - The type of button clicked ('prev' or 'next').
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*/
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static handleHeaderButton( button, type ) {
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const tablist = button
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.closest( '.tabber__header' )
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.querySelector( '.tabber__tabs' );
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const tablistWidth = tablist.offsetWidth;
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const scrollOffset = type === 'prev' ? -tablistWidth / 2 : tablistWidth / 2;
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TabberAction.scrollTablist( scrollOffset, tablist );
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}
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/**
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* Checks if there are entries and the first entry has a target element
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* that is an instance of Element.
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* If true, calls the setActiveTabpanel method of the TabberAction class
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* with the activeTabpanel as the argument.
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*
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* @param {ResizeObserverEntry[]} entries
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*/
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static handleElementResize( entries ) {
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if ( entries && entries.length > 0 ) {
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const activeTabpanel = entries[ 0 ].target;
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if ( activeTabpanel instanceof Element ) {
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TabberAction.setActiveTabpanel( activeTabpanel );
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}
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}
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}
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/**
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* Sets up event listeners for tab elements.
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* Attaches a click event listener to the body content element,
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* delegating the click event to the tab elements.
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* When a tab element is clicked, it triggers the handleClick method of the TabberAction class.
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*/
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static attachEvents() {
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if ( window.ResizeObserver ) {
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resizeObserver = new ResizeObserver( TabberAction.handleElementResize );
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}
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}
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}
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/**
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* Represents a TabberEvent class that handles events related to tab navigation.
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*
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* @class TabberEvent
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* @param {Element} tabber - The tabber element containing the tabs and header.
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* @param {Element} tablist - The tab list element containing the tab elements.
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*/
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class TabberEvent {
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constructor( tabber, tablist ) {
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this.tabber = tabber;
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this.tablist = tablist;
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this.header = this.tablist.parentElement;
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this.tabs = this.tablist.querySelectorAll( ':scope > .tabber__tab' );
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this.activeTab = this.tablist.querySelector( '[aria-selected="true"]' );
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this.indicator = this.tabber.querySelector( ':scope > .tabber__header > .tabber__indicator' );
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this.tabFocus = 0;
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this.debouncedUpdateHeaderOverflow = mw.util.debounce( () => TabberAction.updateHeaderOverflow( this.tabber ), 250 );
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this.handleTabFocusChange = this.handleTabFocusChange.bind( this );
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this.onHeaderClick = this.onHeaderClick.bind( this );
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this.onTablistScroll = this.onTablistScroll.bind( this );
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this.onTablistKeydown = this.onTablistKeydown.bind( this );
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}
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/**
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* Returns a debounced function that updates the header overflow.
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*
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* @return {Function} A debounced function that updates the header overflow.
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*/
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debounceUpdateHeaderOverflow() {
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return this.debouncedUpdateHeaderOverflow;
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}
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/**
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* Handles changing the focus to the next or previous tab based on the arrow direction.
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*
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* @param {string} arrowDirection - The direction of the arrow key pressed ('right' or 'left').
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*/
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handleTabFocusChange( arrowDirection ) {
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this.tabs[ this.tabFocus ].setAttribute( 'tabindex', '-1' );
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if ( arrowDirection === 'right' ) {
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this.tabFocus = ( this.tabFocus + 1 ) % this.tabs.length;
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} else if ( arrowDirection === 'left' ) {
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this.tabFocus = ( this.tabFocus - 1 + this.tabs.length ) % this.tabs.length;
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}
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this.tabs[ this.tabFocus ].setAttribute( 'tabindex', '0' );
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this.tabs[ this.tabFocus ].focus();
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}
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/**
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* Handles the click event on the tabber header.
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* If a tab is clicked, it sets the active tab, updates the URL hash without adding to browser history,
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* and sets the active tab using TabberAction.setActiveTab method.
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* If a previous or next button is clicked on a pointer device, it handles the header button accordingly.
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*
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* @param {Event} e - The click event object.
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*/
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onHeaderClick( e ) {
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const tab = e.target.closest( '.tabber__tab' );
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if ( tab ) {
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// Prevent default anchor actions
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e.preventDefault();
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this.activeTab = tab;
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// Update the URL hash without adding to browser history
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if ( config.updateLocationOnTabChange ) {
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history.replaceState(
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null,
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'',
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window.location.pathname + window.location.search + '#' + this.activeTab.id
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);
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}
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TabberAction.setActiveTab( this.activeTab );
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return;
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}
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const isPointerDevice = window.matchMedia( '(hover: hover)' ).matches;
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if ( isPointerDevice ) {
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const prevButton = e.target.closest( '.tabber__header__prev' );
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if ( prevButton ) {
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TabberAction.handleHeaderButton( prevButton, 'prev' );
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return;
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}
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const nextButton = e.target.closest( '.tabber__header__next' );
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if ( nextButton ) {
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TabberAction.handleHeaderButton( nextButton, 'next' );
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return;
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}
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}
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}
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/**
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* Update the header overflow based on the scroll position of the tablist.
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*/
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onTablistScroll() {
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this.debouncedUpdateHeaderOverflow();
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}
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/**
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* Handles the keydown event on the tablist element.
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* If the key pressed is 'ArrowRight', it changes the focus to the next tab.
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* If the key pressed is 'ArrowLeft', it changes the focus to the previous tab.
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*
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* @param {Event} e - The keydown event object.
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*/
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onTablistKeydown( e ) {
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if ( e.key === 'ArrowRight' ) {
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this.handleTabFocusChange( 'right' );
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} else if ( e.key === 'ArrowLeft' ) {
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this.handleTabFocusChange( 'left' );
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}
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}
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/**
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* Adds event listeners for header click, tablist scroll, and tablist keydown.
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*/
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resume() {
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this.header.addEventListener( 'click', this.onHeaderClick );
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this.tablist.addEventListener( 'scroll', this.onTablistScroll );
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this.tablist.addEventListener( 'keydown', this.onTablistKeydown );
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if ( window.ResizeObserver ) {
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const headerOverflowObserver = new ResizeObserver( this.debounceUpdateHeaderOverflow() );
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headerOverflowObserver.observe( this.tablist );
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}
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}
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/**
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* Removes event listeners for header click, tablist scroll, and tablist keydown.
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*/
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pause() {
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this.header.removeEventListener( 'click', this.onHeaderClick );
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this.tablist.removeEventListener( 'scroll', this.onTablistScroll );
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this.tablist.removeEventListener( 'keydown', this.onTablistKeydown );
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}
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/**
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* Initializes the TabberEvent instance by creating an IntersectionObserver to handle tabber visibility.
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* When the tabber intersects with the viewport, it resumes event listeners for header click, tablist scroll, and tablist keydown.
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* Otherwise, it pauses the event listeners.
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*/
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init() {
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// eslint-disable-next-line compat/compat
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this.observer = new IntersectionObserver( ( entries ) => {
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entries.forEach( ( entry ) => {
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if ( entry.isIntersecting ) {
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this.resume();
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} else {
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this.pause();
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}
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} );
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} );
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this.observer.observe( this.tabber );
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this.resume();
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}
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}
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/**
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* Class responsible for creating tabs, headers, and indicators for a tabber element.
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*
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* @class TabberBuilder
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*/
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class TabberBuilder {
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constructor( tabber ) {
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this.tabber = tabber;
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this.header = this.tabber.querySelector( ':scope > .tabber__header' );
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this.tablist = document.createElement( 'nav' );
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this.indicator = document.createElement( 'div' );
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}
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/**
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* Sets the attributes of a tab element.
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*
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* @param {Element} tab - The tab element to set attributes for.
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* @param {string} tabId - The ID of the tab element.
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*/
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setTabAttributes( tab, tabId ) {
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const tabAttributes = {
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class: 'tabber__tab',
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role: 'tab',
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'aria-selected': false,
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'aria-controls': tabId,
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href: '#' + tabId,
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id: 'tab-' + tabId
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};
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Util.setAttributes( tab, tabAttributes );
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}
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/**
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* Creates a tab element with the given title attribute and tab ID.
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*
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* @param {string} titleAttr - The title attribute for the tab element.
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* @param {string} tabId - The ID of the tab element.
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* @return {Element} The created tab element.
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*/
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createTab( titleAttr, tabId ) {
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const tab = document.createElement( 'a' );
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if ( config.parseTabName ) {
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tab.innerHTML = titleAttr;
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} else {
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tab.textContent = titleAttr;
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}
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this.setTabAttributes( tab, tabId );
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return tab;
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}
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/**
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* Sets the attributes of a tab panel element.
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*
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* @param {Element} tabpanel - The tab panel element to set attributes for.
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* @param {string} tabId - The ID of the tab panel element.
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*/
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setTabpanelAttributes( tabpanel, tabId ) {
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const tabpanelAttributes = {
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role: 'tabpanel',
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'aria-labelledby': `tab-${ tabId }`,
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id: tabId
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};
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Util.setAttributes( tabpanel, tabpanelAttributes );
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}
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/**
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* Creates a tab element based on the provided tab panel.
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*
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* @param {Element} tabpanel - The tab panel element to create a tab element for.
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* @return {Element|false} The created tab element, or false if the title attribute is missing
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* or malformed.
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*/
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createTabElement( tabpanel ) {
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const titleAttr = tabpanel.dataset.mwTabberTitle;
|
|
|
|
if ( !titleAttr ) {
|
|
mw.log.error(
|
|
'[TabberNeue] Missing or malformed `data-mw-tabber-title` attribute'
|
|
);
|
|
return false;
|
|
}
|
|
|
|
let tabId;
|
|
if ( config.parseTabName ) {
|
|
tabId = Hash.build( Util.extractTextFromHtml( titleAttr ) );
|
|
} else {
|
|
tabId = Hash.build( titleAttr );
|
|
}
|
|
|
|
this.setTabpanelAttributes( tabpanel, tabId );
|
|
|
|
return this.createTab( titleAttr, tabId );
|
|
}
|
|
|
|
/**
|
|
* Creates tab elements for each tab panel in the tabber.
|
|
*
|
|
* It creates a document fragment to hold the tab elements, then iterates over each tab panel
|
|
* element in the tabber. For each tab panel, it calls the createTabElement method to create a
|
|
* corresponding tab element and appends it to the fragment. Finally, it adds the fragment
|
|
* to the tablist element, sets the necessary attributes for the tablist, and adds a
|
|
* CSS class for styling.
|
|
*/
|
|
createTabs() {
|
|
const fragment = document.createDocumentFragment();
|
|
const tabpanels = this.tabber.querySelectorAll(
|
|
':scope > .tabber__section > .tabber__panel'
|
|
);
|
|
tabpanels.forEach( ( tabpanel ) => {
|
|
fragment.append( this.createTabElement( tabpanel ) );
|
|
} );
|
|
|
|
this.tablist.append( fragment );
|
|
this.tablist.classList.add( 'tabber__tabs' );
|
|
this.tablist.setAttribute( 'role', 'tablist' );
|
|
}
|
|
|
|
/**
|
|
* Creates the indicator element for the tabber.
|
|
*
|
|
* This method creates a div element to serve as the indicator for the active tab.
|
|
* It adds the 'tabber__indicator' CSS class to the indicator element and appends it to the
|
|
* header of the tabber.
|
|
*/
|
|
createIndicator() {
|
|
const indicator = document.createElement( 'div' );
|
|
indicator.classList.add( 'tabber__indicator' );
|
|
this.header.append( indicator );
|
|
}
|
|
|
|
/**
|
|
* Creates the header elements for the tabber.
|
|
*
|
|
* This method creates two buttons for navigating to the previous and next tabs,
|
|
* adds a tablist element. Finally, it appends all these elements to the header of the tabber.
|
|
*/
|
|
createHeader() {
|
|
const prevButton = document.createElement( 'button' );
|
|
prevButton.classList.add( 'tabber__header__prev' );
|
|
|
|
const nextButton = document.createElement( 'button' );
|
|
nextButton.classList.add( 'tabber__header__next' );
|
|
|
|
this.header.append( prevButton, this.tablist, nextButton );
|
|
}
|
|
|
|
/**
|
|
* Initializes the TabberBuilder by creating tabs, header, and indicator elements.
|
|
* Also updates the indicator using TabberAction.
|
|
*/
|
|
init() {
|
|
this.createTabs();
|
|
this.createHeader();
|
|
this.createIndicator();
|
|
const firstTab = this.tablist.querySelector( '.tabber__tab' );
|
|
TabberAction.setActiveTab( firstTab );
|
|
TabberAction.updateHeaderOverflow( this.tabber );
|
|
setTimeout( () => {
|
|
const tabberEvent = new TabberEvent( this.tabber, this.tablist );
|
|
tabberEvent.init();
|
|
this.tabber.classList.add( 'tabber--live' );
|
|
}, 10 );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Loads tabbers with the given elements using the provided configuration.
|
|
*
|
|
* @param {NodeList} tabberEls - The elements representing tabbers to be loaded.
|
|
* @return {void}
|
|
*/
|
|
function load( tabberEls ) {
|
|
mw.loader.load( 'ext.tabberNeue.icons' );
|
|
|
|
Hash.init();
|
|
|
|
tabberEls.forEach( ( tabberEl ) => {
|
|
const tabberBuilder = new TabberBuilder( tabberEl );
|
|
tabberBuilder.init();
|
|
} );
|
|
|
|
const urlHash = window.location.hash;
|
|
if ( Hash.exists( urlHash ) ) {
|
|
const activeTab = document.getElementById( `tab-${ urlHash }` );
|
|
const activeTabpanel = document.getElementById( urlHash );
|
|
TabberAction.setActiveTab( activeTab );
|
|
window.requestAnimationFrame( () => {
|
|
activeTabpanel.scrollIntoView( {
|
|
behavior: 'auto',
|
|
block: 'end',
|
|
inline: 'nearest'
|
|
} );
|
|
} );
|
|
}
|
|
|
|
TabberAction.attachEvents();
|
|
// Delay animation execution so it doesn't not animate the tab gets into position on load
|
|
setTimeout( () => {
|
|
TabberAction.toggleAnimation( true );
|
|
}, 250 );
|
|
}
|
|
|
|
/**
|
|
* Main function that initializes the tabber functionality on the page.
|
|
* It selects all tabber elements that are not live, checks if there are any tabber elements
|
|
* present, and then calls the load function to load the tabber functionality on
|
|
* each tabber element.
|
|
*/
|
|
function main() {
|
|
const tabberEls = document.querySelectorAll( '.tabber:not(.tabber--live)' );
|
|
|
|
if ( tabberEls.length === 0 ) {
|
|
return;
|
|
}
|
|
|
|
load( tabberEls );
|
|
}
|
|
|
|
mw.hook( 'wikipage.content' ).add( () => {
|
|
main();
|
|
} );
|
|
|
|
mw.loader.using( 'ext.visualEditor.desktopArticleTarget.init' ).done( () => {
|
|
// After saving edits
|
|
mw.hook( 'postEdit.afterRemoval' ).add( () => {
|
|
main();
|
|
} );
|
|
} );
|