/**
@license
Copyright (c) 2017 Vaadin Ltd.
This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
*/
let e=!1;window.addEventListener("keydown",(()=>{e=!0}),{capture:!0}),window.addEventListener("mousedown",(()=>{e=!1}),{capture:!0});export const ControlStateMixin=t=>class VaadinControlStateMixin extends((e=>class VaadinTabIndexMixin extends e{static get properties(){var e={tabindex:{type:Number,value:0,reflectToAttribute:!0,observer:"_tabindexChanged"}};return window.ShadyDOM&&(e.tabIndex=e.tabindex),e}})(t)){static get properties(){return{autofocus:{type:Boolean},_previousTabIndex:{type:Number},disabled:{type:Boolean,observer:"_disabledChanged",reflectToAttribute:!0},_isShiftTabbing:{type:Boolean}}}get _keyboardActive(){return e}ready(){this.addEventListener("focusin",(e=>{e.composedPath()[0]===this?this.contains(e.relatedTarget)||this._focus():-1===e.composedPath().indexOf(this.focusElement)||this.disabled||this._setFocused(!0)})),this.addEventListener("focusout",(e=>this._setFocused(!1))),super.ready();const ensureEventComposed=e=>{e.composed||e.target.dispatchEvent(new CustomEvent(e.type,{bubbles:!0,composed:!0,cancelable:!1}))};this.shadowRoot.addEventListener("focusin",ensureEventComposed),this.shadowRoot.addEventListener("focusout",ensureEventComposed),this.addEventListener("keydown",(e=>{if(!e.defaultPrevented&&9===e.keyCode)if(e.shiftKey)this._isShiftTabbing=!0,HTMLElement.prototype.focus.apply(this),this._setFocused(!1),setTimeout((()=>this._isShiftTabbing=!1),0);else{const e=window.navigator.userAgent.match(/Firefox\/(\d\d\.\d)/);if(e&&parseFloat(e[1])>=63&&parseFloat(e[1])<66&&this.parentNode&&this.nextSibling){const e=document.createElement("input");e.style.position="absolute",e.style.opacity="0",e.tabIndex=this.tabIndex,this.parentNode.insertBefore(e,this.nextSibling),e.focus(),e.addEventListener("focusout",(()=>this.parentNode.removeChild(e)))}}})),this.autofocus&&!this.disabled&&window.requestAnimationFrame((()=>{this._focus(),this._setFocused(!0),this.setAttribute("focus-ring","")}))}disconnectedCallback(){super.disconnectedCallback(),this.hasAttribute("focused")&&this._setFocused(!1)}_setFocused(t){t?this.setAttribute("focused",""):this.removeAttribute("focused"),t&&e?this.setAttribute("focus-ring",""):this.removeAttribute("focus-ring")}get focusElement(){return window.console.warn(`Please implement the 'focusElement' property in <${this.localName}>`),this}_focus(){this.focusElement&&!this._isShiftTabbing&&(this.focusElement.focus(),this._setFocused(!0))}focus(){this.focusElement&&!this.disabled&&(this.focusElement.focus(),this._setFocused(!0))}blur(){this.focusElement&&(this.focusElement.blur(),this._setFocused(!1))}_disabledChanged(e){this.focusElement.disabled=e,e?(this.blur(),this._previousTabIndex=this.tabindex,this.tabindex=-1,this.setAttribute("aria-disabled","true")):(void 0!==this._previousTabIndex&&(this.tabindex=this._previousTabIndex),this.removeAttribute("aria-disabled"))}_tabindexChanged(e){void 0!==e&&(this.focusElement.tabIndex=e),this.disabled&&this.tabindex&&(-1!==this.tabindex&&(this._previousTabIndex=this.tabindex),this.tabindex=e=void 0),window.ShadyDOM&&this.setProperties({tabIndex:e,tabindex:e})}click(){this.disabled||super.click()}};