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https://gerrit.wikimedia.org/r/mediawiki/skins/Vector.git
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90 lines
2.6 KiB
JavaScript
90 lines
2.6 KiB
JavaScript
/**
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* JavaScript enhancement to the collapsible sidebar.
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*
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* The sidebar provides basic show/hide functionality with CSS
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* but JavaScript is used for progressive enhancements.
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*
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* Enhancements include:
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* - Update `aria-role`s based on expanded/collapsed state.
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* - Update button icon based on expanded/collapsed state.
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* - Persist the sidebar state for logged-in users.
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*
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*/
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/** @interface MwApiConstructor */
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/** @interface CheckboxHack */
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/** @interface MwApi */
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/** @type {CheckboxHack} */ var checkboxHack =
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require( /** @type {string} */( 'mediawiki.page.ready' ) ).checkboxHack;
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var SIDEBAR_BUTTON_ID = 'mw-sidebar-button',
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SIDEBAR_CHECKBOX_ID = 'mw-sidebar-checkbox',
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SIDEBAR_PREFERENCE_NAME = 'VectorSidebarVisible';
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var debounce = require( /** @type {string} */ ( 'mediawiki.util' ) ).debounce;
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/** @type {MwApi} */ var api;
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/**
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* Improve the interactivity of the sidebar panel by binding optional checkbox hack enhancements
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* for focus and `aria-expanded`. Also, flip the icon image on click.
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*
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* @param {HTMLElement|null} checkbox
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* @param {HTMLElement|null} button
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* @return {void}
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*/
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function initCheckboxHack( checkbox, button ) {
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if ( checkbox instanceof HTMLInputElement && button ) {
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checkboxHack.bindToggleOnClick( checkbox, button );
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checkboxHack.bindUpdateAriaExpandedOnInput( checkbox, button );
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checkboxHack.updateAriaExpanded( checkbox, button );
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}
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}
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/**
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* Execute a debounced API request to save the sidebar user preference.
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* The request is meant to fire 1000 milliseconds after the last click on
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* the sidebar button.
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*
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* @param {HTMLInputElement} checkbox
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* @return {any}
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*/
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function saveSidebarState( checkbox ) {
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return debounce( 1000, function () {
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api = api || new mw.Api();
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api.saveOption( SIDEBAR_PREFERENCE_NAME, checkbox.checked ? 1 : 0 );
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} );
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}
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/**
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* Bind the event handler that saves the sidebar state to the click event
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* on the sidebar button.
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*
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* @param {HTMLElement|null} checkbox
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* @param {HTMLElement|null} button
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*/
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function bindSidebarClickEvent( checkbox, button ) {
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if ( checkbox instanceof HTMLInputElement && button ) {
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button.addEventListener( 'click', saveSidebarState( checkbox ) );
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}
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}
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/**
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* Initialize all JavaScript sidebar enhancements.
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*
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* @param {Window} window
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*/
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function init( window ) {
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var checkbox = window.document.getElementById( SIDEBAR_CHECKBOX_ID ),
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button = window.document.getElementById( SIDEBAR_BUTTON_ID );
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initCheckboxHack( checkbox, button );
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if ( mw.config.get( 'wgUserName' ) ) {
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bindSidebarClickEvent( checkbox, button );
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}
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}
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module.exports = {
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init: init
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};
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