/**
@license
Copyright (c) 2017 Vaadin Ltd.
This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
*/
export const A11yMixin=e=>class A11yMixin extends e{static get observers(){return["_a11yUpdateGridSize(size, _columnTree, _columnTree.*)"]}_a11yGetHeaderRowCount(e){return e.filter((e=>e.some((e=>e._headerTemplate||e.headerRenderer||e.path||e.header)))).length}_a11yGetFooterRowCount(e){return e.filter((e=>e.some((e=>e._headerTemplate||e.headerRenderer)))).length}_a11yUpdateGridSize(e,t){if(void 0===e||void 0===t)return;const r=t[t.length-1];this.$.table.setAttribute("aria-rowcount",e+this._a11yGetHeaderRowCount(t)+this._a11yGetFooterRowCount(t)),this.$.table.setAttribute("aria-colcount",r&&r.length||0),this._a11yUpdateHeaderRows(),this._a11yUpdateFooterRows()}_a11yUpdateHeaderRows(){Array.from(this.$.header.children).forEach(((e,t)=>e.setAttribute("aria-rowindex",t+1)))}_a11yUpdateFooterRows(){Array.from(this.$.footer.children).forEach(((e,t)=>e.setAttribute("aria-rowindex",this._a11yGetHeaderRowCount(this._columnTree)+this.size+t+1)))}_a11yUpdateRowRowindex(e,t){e.setAttribute("aria-rowindex",t+this._a11yGetHeaderRowCount(this._columnTree)+1)}_a11yUpdateRowSelected(e,t){e.setAttribute("aria-selected",Boolean(t)),Array.from(e.children).forEach((e=>e.setAttribute("aria-selected",Boolean(t))))}_a11yUpdateRowLevel(e,t){e.setAttribute("aria-level",t+1)}_a11yUpdateRowDetailsOpened(e,t){Array.from(e.children).forEach((e=>{"boolean"==typeof t?e.setAttribute("aria-expanded",t):e.hasAttribute("aria-expanded")&&e.removeAttribute("aria-expanded")}))}_a11ySetRowDetailsCell(e,t){Array.from(e.children).forEach((e=>{e!==t&&e.setAttribute("aria-controls",t.id)}))}_a11yUpdateCellColspan(e,t){e.setAttribute("aria-colspan",Number(t))}_a11yUpdateSorters(){Array.from(this.querySelectorAll("vaadin-grid-sorter")).forEach((e=>{let t=e.parentNode;for(;t&&"vaadin-grid-cell-content"!==t.localName;)t=t.parentNode;if(t&&t.assignedSlot){t.assignedSlot.parentNode.setAttribute("aria-sort",{asc:"ascending",desc:"descending"}[String(e.direction)]||"none")}}))}};