@spectrum-web-components/reactive-controllers/src/RovingTabindex.js

ReactiveControllers for powering common UI patterns

"use strict";import{FocusGroupController as i}from"./FocusGroup.js";export class RovingTabindexController extends i{constructor(){super(...arguments);this.managed=!0;this.manageIndexesAnimationFrame=0}set focused(e){e!==this.focused&&(super.focused=e,this.manageTabindexes())}get focused(){return super.focused}clearElementCache(e=0){cancelAnimationFrame(this.manageIndexesAnimationFrame),super.clearElementCache(e),this.managed&&(this.manageIndexesAnimationFrame=requestAnimationFrame(()=>this.manageTabindexes()))}manageTabindexes(){this.focused&&!this.hostDelegatesFocus?this.updateTabindexes(()=>({tabIndex:-1})):this.updateTabindexes(e=>({removeTabIndex:e.contains(this.focusInElement)&&e!==this.focusInElement,tabIndex:e===this.focusInElement?0:-1}))}updateTabindexes(e){this.elements.forEach(a=>{const{tabIndex:n,removeTabIndex:s}=e(a);if(!s){this.focused?a!==this.elements[this.currentIndex]&&(a.tabIndex=n):a.tabIndex=n;return}const t=a;t.requestUpdate&&t.requestUpdate()})}manage(){this.managed=!0,this.manageTabindexes(),super.manage()}unmanage(){this.managed=!1,this.updateTabindexes(()=>({tabIndex:0})),super.unmanage()}hostUpdated(){super.hostUpdated(),this.host.hasUpdated||this.manageTabindexes()}}
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