@spectrum-web-components/shared/src/focusable.js

Shared mixins, tools, etc. that support developing Spectrum Web Components.

"use strict";var d=Object.defineProperty;var b=Object.getOwnPropertyDescriptor;var n=(s,a,e,t)=>{for(var i=t>1?void 0:t?b(a,e):a,o=s.length-1,r;o>=0;o--)(r=s[o])&&(i=(t?r(a,e,i):r(i))||i);return t&&i&&d(a,e,i),i};import{SpectrumElement as h}from"@spectrum-web-components/base";import{property as l}from"@spectrum-web-components/base/src/decorators.js";import{FocusVisiblePolyfillMixin as m}from"./focus-visible.js";function u(){return new Promise(s=>requestAnimationFrame(()=>s()))}export class Focusable extends m(h){constructor(){super(...arguments);this.disabled=!1;this.autofocus=!1;this._tabIndex=0;this.manipulatingTabindex=!1;this.autofocusReady=Promise.resolve()}get tabIndex(){if(this.focusElement===this){const t=this.hasAttribute("tabindex")?Number(this.getAttribute("tabindex")):NaN;return isNaN(t)?-1:t}const e=parseFloat(this.hasAttribute("tabindex")&&this.getAttribute("tabindex")||"0");return this.disabled||e<0?-1:this.focusElement?this._tabIndex:e}set tabIndex(e){var t;if(this.manipulatingTabindex){this.manipulatingTabindex=!1;return}if(this.focusElement===this){if(this.disabled)this._tabIndex=e;else if(e!==this._tabIndex){this._tabIndex=e;const i=""+e;this.manipulatingTabindex=!0,this.setAttribute("tabindex",i)}return}if(e===-1?this.addEventListener("pointerdown",this.onPointerdownManagementOfTabIndex):(this.manipulatingTabindex=!0,this.removeEventListener("pointerdown",this.onPointerdownManagementOfTabIndex)),e===-1||this.disabled){if(this.manipulatingTabindex=!0,this.setAttribute("tabindex","-1"),this.removeAttribute("focusable"),this.selfManageFocusElement)return;e!==-1?(this._tabIndex=e,this.manageFocusElementTabindex(e)):(t=this.focusElement)==null||t.removeAttribute("tabindex");return}this.setAttribute("focusable",""),this.hasAttribute("tabindex")?this.removeAttribute("tabindex"):this.manipulatingTabindex=!1,this._tabIndex=e,this.manageFocusElementTabindex(e)}onPointerdownManagementOfTabIndex(){this.tabIndex===-1&&setTimeout(()=>{this.tabIndex=0,this.focus({preventScroll:!0}),this.tabIndex=-1})}async manageFocusElementTabindex(e){this.focusElement||await this.updateComplete,e===null?this.focusElement.removeAttribute("tabindex"):this.focusElement!==this&&(this.focusElement.tabIndex=e)}get focusElement(){throw new Error("Must implement focusElement getter!")}get selfManageFocusElement(){return!1}focus(e){this.disabled||!this.focusElement||(this.focusElement!==this?this.focusElement.focus(e):HTMLElement.prototype.focus.apply(this,[e]))}blur(){const e=this.focusElement||this;e!==this?e.blur():HTMLElement.prototype.blur.apply(this)}click(){if(this.disabled)return;const e=this.focusElement||this;e!==this?e.click():HTMLElement.prototype.click.apply(this)}manageAutoFocus(){this.autofocus&&(this.dispatchEvent(new KeyboardEvent("keydown",{code:"Tab"})),this.focusElement.focus())}firstUpdated(e){super.firstUpdated(e),(!this.hasAttribute("tabindex")||this.getAttribute("tabindex")!=="-1")&&this.setAttribute("focusable","")}update(e){e.has("disabled")&&this.handleDisabledChanged(this.disabled,e.get("disabled")),super.update(e)}updated(e){super.updated(e),e.has("disabled")&&this.disabled&&this.blur()}async handleDisabledChanged(e,t){const i=()=>this.focusElement!==this&&typeof this.focusElement.disabled!="undefined";e?(this.manipulatingTabindex=!0,this.setAttribute("tabindex","-1"),await this.updateComplete,i()?this.focusElement.disabled=!0:this.setAttribute("aria-disabled","true")):t&&(this.manipulatingTabindex=!0,this.focusElement===this?this.setAttribute("tabindex",""+this._tabIndex):this.removeAttribute("tabindex"),await this.updateComplete,i()?this.focusElement.disabled=!1:this.removeAttribute("aria-disabled"))}async getUpdateComplete(){const e=await super.getUpdateComplete();return await this.autofocusReady,e}connectedCallback(){super.connectedCallback(),this.autofocus&&(this.autofocusReady=new Promise(async e=>{await u(),await u(),e()}),this.updateComplete.then(()=>{this.manageAutoFocus()}))}}n([l({type:Boolean,reflect:!0})],Focusable.prototype,"disabled",2),n([l({type:Boolean})],Focusable.prototype,"autofocus",2),n([l({type:Number})],Focusable.prototype,"tabIndex",1);
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