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* Copyright bei
* Entwicklungs- und Pflegeverbund für das gemeinsame Fachverfahren gefa
*
*******************************************************************************/
import {
AfterViewChecked,
AfterViewInit,
Component,
ContentChildren,
Directive,
ElementRef,
EventEmitter,
HostBinding,
Input,
NgZone,
OnDestroy,
Output,
QueryList,
TemplateRef,
ViewChild,
ViewChildren,
inject,
} from '@angular/core';
import {
getKeyboardFocusableElements,
observeSize,
relativeTo,
subscribeOutsideZone,
subscribeWindow,
waitForRender,
} from '../utils/internal-utils';
import {
Callback,
FocusableElementOwner,
Item,
ItemGroup,
} from '../utils/util.types';
import { isItem } from '../utils/utilities';
import { TextHighlightService } from '../internal/text-highlight/text-highlight.component';
import {
TableCellContext,
TableColumn,
TableHeaderCellContext,
} from './table.common';
export * from './table.common';
@Directive({
selector: 'ng-template[td-template-for]', // eslint-disable-line @angular-eslint/directive-selector -- old occurence, change requires API breakage
})
export class TableTdTemplateDirective<T> {
@Input('td-template-for')
public templateFor!: string;
constructor(public readonly template: TemplateRef<TableCellContext<T>>) {}
static ngTemplateContextGuard<T>(
dir: TableTdTemplateDirective<T>,
ctx: unknown,
): ctx is TableCellContext<T> {
return true;
}
}
interface TmpCell<T> {
column: TableColumn<T>;
item?: T;
label: string;
rowIndex: number;
colIndex: number;
}
@Directive({
selector: 'ng-template[th-template-for]', // eslint-disable-line @angular-eslint/directive-selector -- old occurence, change requires API breakage
})
export class TableThTemplateDirective<T> {
@Input('th-template-for')
public templateFor!: string;
constructor(
public readonly template: TemplateRef<TableHeaderCellContext<T>>,
) {}
static ngTemplateContextGuard<T>(
dir: TableThTemplateDirective<T>,
ctx: unknown,
): ctx is TableHeaderCellContext<T> {
return true;
}
}
@Directive({
selector: '[data-gc-int-td]',
exportAs: 'tdCtx',
})
export class TableCellDirective<T> implements TableCellContext<T> {
@Input('col')
public col!: TableColumn<T>;
@Input('row')
public row!: T;
@Input('colIdx')
public colIdx!: number;
@Input('rowIdx')
public rowIdx!: number;
@HostBinding('style.text-align')
get alignment(): string {
if (this.col.alignment == 'right-decimal') {
return 'right';
}
return this.col.alignment;
}
public get $implicit(): TableCellContext<T> {
return this;
}
public get cell(): TmpCell<T> {
const label = this.col.label ? this.col.label(this.row) : 'null';
return {
column: this.col,
item: this.row,
rowIndex: this.rowIdx,
colIndex: this.colIdx,
label,
};
}
public readonly el: ElementRef<HTMLElement> = inject<ElementRef<HTMLElement>>(
ElementRef<HTMLElement>,
);
}
@Directive({
selector: 'th[data-gc-table-int-th]',
exportAs: 'thCtx',
})
export class TableHeaderDirective<T> implements TableHeaderCellContext<T> {
@Input('col')
public col!: TableColumn<T>;
@Input('colIdx')
public colIdx!: number;
@HostBinding('style.text-align')
get alignment(): string {
if (this.col.alignment === 'right-decimal') {
return 'right';
}
return this.col.alignment;
}
public get $implicit(): TableHeaderCellContext<T> {
return this;
}
public get cell(): TmpCell<T> {
return {
column: this.col,
item: undefined,
rowIndex: 0,
colIndex: this.colIdx,
label: this.col.title,
};
}
public readonly el: ElementRef<HTMLElement> = inject<ElementRef<HTMLElement>>(
ElementRef<HTMLElement>,
);
}
/** A group of table items. */
export interface TableItemGroup<T> extends ItemGroup<T> {
/**
* Override the total number of entries within the group, if not set the current number of items is used.
* Count may be different from the number of current items in case of pagination.
*/
entryCount?: {
/** Total number of items in this group. */
totalEntryCount: number;
/** Index of the first item in the current list within the complete group. */
offset: number;
};
}
interface TableState {
loading?: false | 'default';
search?: boolean;
}
/**
* A Table component.
*/
@Component({
selector: 'gc-table',
templateUrl: './table.component.html',
styleUrls: ['./table.component.css'],
providers: [TextHighlightService],
})
export class TableComponent<T>
implements FocusableElementOwner, AfterViewInit, AfterViewChecked, OnDestroy
{
/** Title of the table. Visibility depends on the `showLabel` input. */
@Input()
public label = '';
/**
* If `true`, the label will be visible as heading above the table. Otherwise, the information will
* be visually hidden and only available for accessibility utilities.
*/
@Input()
public showLabel = false;
/**
* Items displayed in the settings menu (menu-button is not visible, when `settingsMenuItems` is undefined or empty)
*/
@Input()
public settingsMenuItems?: readonly Item[];
/** The columns of the table */
@Input()
public columns: readonly TableColumn<T>[] = [];
/** Pager template slot*/
@Input()
public pagerTemplate: TemplateRef<Record<string, never>> | null = null;
/**
* show the entry count
* @deprecated - property no longer needs to be an input and will be removed in future as such. (will remain a static property)
*/
@Input()
public showEntryCount = true;
/**
* Override the total number of entries, if not set the current number of items is used.
* Count may be different from the number of current items in case of pagination.
*/
@Input()
public totalEntryCount?: number;
/** If set to `true` the header columns are sticky and will remain visible when the table content scrolls. */
@Input()
@HostBinding('class.gc-with-sticky-header')
public stickyHeaderColumns = false;
/**
* Set a fixed height on the content area of the table, specified as a number of rows to always reserve space for.
* Only used when data is present, does not affect the height of empty tables or related states. When the space needed
* to display the provided data exceeds the fixed height, the table content may scroll.
* @see stickyHeaderColumns
*/
@Input()
public fixedContentHeight?: number;
/** Marks the table as required. The table should contain selectable option when this is used. */
@Input()
@HostBinding('class.gc-state-required')
public required = false;
/** Hint message that appears within the table caption. */
@Input()
public hint = '';
/** Error message which is part of the table caption. */
@Input()
public errorMessage = '';
/** Used to display a confirmation-banner on top of the table. */
@Input()
public confirmationBannerTemplate: TemplateRef<Record<string, never>> | null =
null;
/**
* Action that is fired when clicked on item in table-settings-menu
*/
@Output()
public readonly onSettingsMenuAction: EventEmitter<Item> =
new EventEmitter<Item>();
/** @ignore */
@ViewChildren(TableHeaderDirective)
public thElements?: QueryList<TableHeaderDirective<T>>;
/** @ignore */
@ViewChildren(TableCellDirective)
public tdElements?: QueryList<TableCellDirective<T>>;
/** @ignore */
@ContentChildren(TableThTemplateDirective)
public thTemplates!: QueryList<TableThTemplateDirective<T>>;
/** @ignore */
@ContentChildren(TableTdTemplateDirective)
public tdTemplates!: QueryList<TableTdTemplateDirective<T>>;
/** @ignore */
@ViewChild('thDefaultTemplate')
public thDefaultTemplate!: TemplateRef<TableHeaderCellContext<T>>;
/** @ignore */
@ViewChild('tdDefaultTemplate')
public tdDefaultTemplate!: TemplateRef<TableCellContext<T>>;
/** @ignore */
@ViewChild('table')
public table!: ElementRef<HTMLTableElement>;
/** @ignore */
@ViewChild('header')
public header?: ElementRef<HTMLElement>;
/** The text which should be highlighted through the table. */
@Input()
public get highlightString(): string | undefined {
return this.textHighlightService.highlightString;
}
public set highlightString(val: string | undefined) {
this.textHighlightService.highlightString = val;
}
/**
* Changes the state of the table.
* Possible optional states are:
* - loading: indicates that the table is in a loading state.
* - search: indicates that the table is in an ongoing search context/state.
*/
@Input()
public get state(): TableState {
return this._state;
}
public set state(val: TableState) {
this._state = val;
this.recomputeShowEntryCount();
}
/** @ignore */
@HostBinding('style.--gc-table-fixed-content-height.px')
public get _fixedContentHeight(): number | undefined {
if (
this.fixedContentHeight === undefined ||
this.isEmpty() ||
this.state.loading
) {
return undefined;
} else {
const headerHeight = 42;
const rowHeight = 73;
return headerHeight + rowHeight * this.fixedContentHeight;
}
}
/**
* The items of the table. If group items are supplied, items of each group are displayed in separate blocks
* within the table.
*/
@Input()
public get items(): readonly T[] | readonly TableItemGroup<T>[] {
return this._items;
}
public set items(value: readonly T[] | readonly TableItemGroup<T>[]) {
this._items = value;
if (this._isTableItemGroup(this._items)) {
this.allRowsFlattened = this._items.reduce<T[]>((acc, curr) => {
return [...acc, ...curr.items];
}, []);
}
this.recomputeShowEntryCount();
}
/** @ignore */
public get _totalEntryCount(): number {
if (this.state.loading) {
return 0;
}
if (this.totalEntryCount !== undefined) {
return this.totalEntryCount;
} else if (this._isTableItemGroup(this.items)) {
return this.items.reduce((sum, group) => sum + group.items.length, 0);
} else {
return this.items.length;
}
}
/**
* Set to true if the data is currently loading.
* @deprecated - use new *state* input instead.
*/
@Input()
public get isLoading(): boolean {
return this._isLoading;
}
public set isLoading(value: boolean) {
this._isLoading = value;
this.state = { ...this.state, loading: value ? 'default' : false };
}
/** @ignore */
smallActions = false;
/** @ignore */
_stickyRowHeaders = true;
/** @ignore */
protected _showEntryCount = true;
/** @ignore */
private _isLoading = false;
/** @ignore */
private resizeObserver?: Callback;
/** @ignore */
private screenResizeObserver?: Callback;
/** @ignore */
private resizeObserverHeaderCleanup?: Callback;
/** @ignore */
private headerHeightObserver?: Callback;
/**
* Helper object for tracking the last focused cell and it's contained elements information.
* @prop { index } - index of the last focused element within the cell
* @prop { cell } - coordinates of the last focused cell
* @ignore
* */
private lastFocusedCell?: {
index: number;
cell: { colIdx: number; rowIdx: number };
};
/** @ignore */
private _items: readonly T[] | readonly TableItemGroup<T>[] = [];
/** @ignore */
private allRowsFlattened: readonly T[] = [];
/** @ignore */
private eventCallbacks: Callback[] = [];
/** @ignore */
private _state: Readonly<TableState> = {
loading: false,
search: false,
};
constructor(
private textHighlightService: TextHighlightService,
private zone: NgZone,
) {}
focusChild(): boolean {
const firstFocusableChildren = getKeyboardFocusableElements(
this.table.nativeElement,
);
const children =
firstFocusableChildren.length > 0
? firstFocusableChildren
: Array.from(
this.table.nativeElement.querySelectorAll<HTMLElement>(
'[tabindex="-1"]:not([disabled]):not([aria-hidden])',
),
);
if (children.length > 0) {
children[0].focus();
return true;
} else {
return false;
}
}
/** @ignore */
public findTdTemplate(columnId: string): TemplateRef<TableCellContext<T>> {
let templ = this.tdDefaultTemplate;
templ =
this.tdTemplates.find(template => template.templateFor === columnId)
?.template ?? templ;
return templ;
}
/** @ignore */
public findThTemplate(
columnId: string,
): TemplateRef<TableHeaderCellContext<T>> {
let templ = this.thDefaultTemplate;
templ =
this.thTemplates.find(template => template.templateFor === columnId)
?.template ?? templ;
return templ;
}
/** @ignore */
public findCell(
colIndex: number,
rowIndex: number,
): TableCellDirective<T> | undefined {
return this.tdElements?.find(
tdEl => tdEl.cell.colIndex == colIndex && tdEl.cell.rowIndex == rowIndex,
);
}
// type guard written as class member to allow using it within the template
/** @ignore */
public _isTableItemGroup(
items: readonly T[] | readonly TableItemGroup<T>[],
): items is readonly TableItemGroup<T>[] {
if (items.length === 0) {
return false;
} else {
const item = items[0];
return isItem(item) && Array.isArray(item.items);
}
}
/** @ignore */
isEmpty(): boolean {
return this.items.length === 0;
}
/** @ignore */
ngAfterViewInit(): void {
this.resizeObserver = observeSize(
this.table,
this.zone,
this.resizeObserverCallback.bind(this),
);
this.screenResizeObserver = subscribeWindow(
'resize',
this.windowResizeObserverCallback.bind(this),
);
this.thElements?.changes.subscribe(this.updateTh.bind(this));
this.eventCallbacks.push(
subscribeOutsideZone(
this.zone,
this.table.nativeElement,
'keydown',
e => {
if (e.target instanceof HTMLElement) {
this.onKeyDown(e);
}
},
),
);
this.eventCallbacks.push(
subscribeOutsideZone(
this.zone,
this.table.nativeElement,
'focusin',
e => {
void this.onFocusableNodeFocus(e);
},
),
);
this.updateTh();
}
/** @ignore */
ngAfterViewChecked(): void {
if (this.resizeObserverHeaderCleanup && !this.header) {
this.resizeObserverHeaderCleanup();
} else if (this.header && !this.resizeObserverHeaderCleanup) {
this.resizeObserverHeaderCleanup = observeSize(
this.header,
this.zone,
() => this.checkScrolling(),
);
}
}
/** @ignore */
ngOnDestroy(): void {
if (this.resizeObserver) {
this.resizeObserver();
}
if (this.resizeObserverHeaderCleanup) {
this.resizeObserverHeaderCleanup();
}
if (this.screenResizeObserver) {
this.screenResizeObserver();
}
if (this.headerHeightObserver) {
this.headerHeightObserver();
}
// clear focus listeners
this.eventCallbacks.forEach(fc => fc());
}
/**
* Focus a cell in an item
*
* @param item the item representing the row
* @param column optional column or index of the column to move the focus to
* @param defer defer the focus to the next render cycle
* @returns `true` if the focus could be transfer otherwise `false` - if you passed `defer=true` it is always true
*/
public focusItem(
item: T,
column?: TableColumn<T> | number,
defer?: boolean,
): boolean {
const block = () => {
const target = this.computeFocusTarget(item, column);
if (target) {
return this.focusCell(target.rowIdx, target.colIdx, 'first');
}
return false;
};
if (defer) {
this.zone.runOutsideAngular(() => {
setTimeout(block);
});
return true;
}
return block();
}
/** @ignore */
protected getGlobalRowIndex(item: T, index: number) {
if (this._isTableItemGroup(this.items)) {
return this.allRowsFlattened.indexOf(item);
}
return index;
}
/** @ignore */
protected trackByGroup(index: number, group: TableItemGroup<T>) {
return group.key;
}
/** @ignore */
protected trackByIndex(index: number) {
return index;
}
protected computeGridStyles() {
const fillColumn =
this.columns.find(c => c.fillWidth && c.fillWidth > 0) === undefined
? this.columns.find(c => c.rowHeader) ?? this.columns[0]
: undefined;
return (
'grid-template-columns: ' +
this.columns
.map(c => {
const fillWidth = fillColumn === c ? 1 : c.fillWidth;
const minWidth = c.minWidth;
if (minWidth && fillWidth) {
return `minmax(${this.minWidthValue(minWidth)}, ${fillWidth.toFixed(0)}fr)`;
} else if (fillWidth) {
return `${fillWidth.toFixed(0)}fr`;
} else if (minWidth) {
return `minmax(${this.minWidthValue(minWidth)}, auto)`;
}
return 'auto';
})
.join(' ')
);
}
protected computeGroupStyles(column: TableColumn<T>, colIdx: number) {
if (column.rowHeader) {
// eslint-disable-next-line @typescript-eslint/restrict-template-expressions -- number is known to be an integer
return `grid-column: 1/${this.columns.length + 1};`;
}
// eslint-disable-next-line @typescript-eslint/restrict-template-expressions -- number is known to be an integer
return `grid-column: ${colIdx + 1}; border-bottom: unset;`;
}
/** @ignore */
private onKeyDown(event: KeyboardEvent): void {
const key = event.key;
switch (key) {
case 'ArrowUp':
this.handleArrowUp();
event.preventDefault();
event.stopPropagation();
break;
case 'ArrowDown':
this.handleArrowDown();
event.preventDefault();
event.stopPropagation();
break;
case 'ArrowRight':
this.handleArrowRight();
event.preventDefault();
event.stopPropagation();
break;
case 'ArrowLeft':
this.handleArrowLeft();
event.preventDefault();
event.stopPropagation();
break;
case 'Home':
this.handleHomeKey();
event.preventDefault();
event.stopPropagation();
break;
case 'End':
this.handleEndKey();
event.preventDefault();
event.stopPropagation();
break;
}
}
private minWidthValue(value: number) {
if (value <= 0) {
return 'min-content';
}
return `${value.toFixed(0)}px`;
}
private updateTh() {
const first = this.thElements?.first;
if (this.headerHeightObserver) {
this.headerHeightObserver();
}
if (first) {
const r = new ResizeObserver(() => {
this.updateHeaderStyle(
Math.max(first.el.nativeElement.getBoundingClientRect().height, 41),
);
});
r.observe(first.el.nativeElement);
this.headerHeightObserver = () => r.disconnect();
this.updateHeaderStyle(
Math.max(first.el.nativeElement.getBoundingClientRect().height, 41),
);
} else {
this.updateHeaderStyle(undefined);
}
}
private updateHeaderStyle(height: number | undefined) {
if (height) {
this.table.nativeElement.style.setProperty(
'--gc-table-header-height',
`${height.toFixed(0)}px`,
);
} else {
this.table.nativeElement.style.removeProperty('--gc-table-header-height');
}
}
private computeFocusTarget(item: T, column?: TableColumn<T> | number) {
if (column !== undefined) {
if (typeof column === 'number') {
return this.tdElements?.find(
cell => cell.row === item && cell.colIdx === column,
);
} else {
return this.tdElements?.find(
cell => cell.row === item && cell.col.id === column.id,
);
}
} else {
const rowHeaderCell = this.tdElements?.find(
cell => cell.row === item && cell.col.rowHeader === true,
);
if (rowHeaderCell) {
return rowHeaderCell;
} else {
return this.tdElements?.find(
cell => cell.row === item && cell.colIdx === 0,
);
}
}
}
/** @ignore */
private windowResizeObserverCallback(): void {
this._stickyRowHeaders = window.innerHeight >= 400;
}
/** @ignore */
private resizeObserverCallback(): void {
this.checkScrolling();
}
/** @ignore */
private checkScrolling() {
const table = this.table.nativeElement.clientWidth;
this.smallActions = table < 650;
}
/** @ignore */
private handleArrowRight(): void {
if (this.lastFocusedCell) {
const nextCol = this.lastFocusedCell.cell.colIdx + 1;
const totalNumberOfCols =
this.tdElements?.reduce(
(acc, curr) => (curr.colIdx > acc ? curr.colIdx : acc),
0,
) ?? 0;
const nextElementWithinFocused = this.focusNextElementInCell();
if (nextCol <= totalNumberOfCols && !nextElementWithinFocused) {
this.focusCell(this.lastFocusedCell.cell.rowIdx, nextCol, 'first');
}
}
}
/** @ignore */
private handleArrowLeft(): void {
if (this.lastFocusedCell) {
const previousElementWithinFocused = this.focusPreviousElementInCell();
const nextCol = this.lastFocusedCell.cell.colIdx - 1;
if (nextCol >= 0 && !previousElementWithinFocused) {
this.focusCell(this.lastFocusedCell.cell.rowIdx, nextCol, 'last');
}
}
}
/** @ignore */
private handleArrowUp(): void {
if (this.lastFocusedCell) {
const nextRow = this.lastFocusedCell.cell.rowIdx - 1;
if (nextRow >= -1) {
this.focusCell(nextRow, this.lastFocusedCell.cell.colIdx, 'index');
}
}
}
/** @ignore */
private handleArrowDown(): void {
if (this.lastFocusedCell) {
const previousRow = this.lastFocusedCell.cell.rowIdx + 1;
const totalNumberOfRows =
this.tdElements?.reduce(
(acc, curr) => (curr.rowIdx > acc ? curr.rowIdx : acc),
0,
) ?? 0;
if (previousRow <= totalNumberOfRows) {
this.focusCell(previousRow, this.lastFocusedCell.cell.colIdx, 'index');
}
}
}
/** @ignore */
private handleEndKey(): void {
const lastCell = this.tdElements?.last;
if (lastCell) {
this.focusCell(lastCell.rowIdx, lastCell.colIdx, 'last');
}
}
/** @ignore */
private handleHomeKey(): void {
const firstCell = this.tdElements?.first;
if (firstCell) {
this.focusCell(0, 0, 'first');
}
}
/** @ignore */
private async onFocusableNodeFocus(event: FocusEvent): Promise<void> {
const findTD = (el: HTMLElement): HTMLElement | null => {
let current = el as HTMLElement | null;
while (current) {
if (current.tagName == 'TD') {
break;
}
current = current.parentElement;
}
return current;
};
this.updateLastFocusedCell();
const target = event.target as HTMLElement;
const tr = findTD(target);
if (tr) {
// Firefox does not scroll the focus element intoView if more than
// 50% is visible already
tr.scrollIntoView({ block: 'nearest', inline: 'nearest' });
if (this.stickyHeaderColumns) {
await waitForRender();
const relative = relativeTo(tr, this.table.nativeElement);
const stickyHeaderHeight = this._isTableItemGroup(this.items)
? 42 * 2
: 42;
if (relative < stickyHeaderHeight) {
this.table.nativeElement.scrollBy({
top: relative - stickyHeaderHeight,
});
}
}
}
this.scrollToActiveCell();
}
/** @ignore */
private updateLastFocusedCell() {
const focusedCell =
this.thElements?.find(i =>
i.el.nativeElement.contains(document.activeElement),
) ??
this.tdElements?.find(i =>
i.el.nativeElement.contains(document.activeElement),
);
if (focusedCell) {
const cell: { rowIdx: number; colIdx: number } = {
colIdx: focusedCell.colIdx,
rowIdx:
focusedCell instanceof TableCellDirective ? focusedCell.rowIdx : -1,
};
const focusableChildren = getKeyboardFocusableElements(
focusedCell.el.nativeElement,
);
const index = focusableChildren.indexOf(
document.activeElement as HTMLElement,
);
this.lastFocusedCell = { index, cell };
}
}
/**
* Focuses the cell within the table that corresponds to the passed row and column parameters.
* @param rowIdx index of the row to be focused
* @param colIdx index of the column to be focused
* @returns true if the cell exists otherwise returns false
* @ignore
*/
private focusCell(
rowIdx: number,
colIdx: number,
restoreIndexInCellStrategy: 'index' | 'first' | 'last',
): boolean {
if (rowIdx >= 0) {
const cell = this.findCell(colIdx, rowIdx);
if (cell) {
const focusableElements = getKeyboardFocusableElements(
cell.el.nativeElement,
);
if (focusableElements.length === 0) {
const programmticallyFocusable = Array.from(
cell.el.nativeElement.querySelectorAll<HTMLElement>(
'*[tabindex="-1"]:not([disabled]):not([aria-hidden])',
),
);
if (programmticallyFocusable.length > 0) {
programmticallyFocusable[0].focus();
return true;
}
} else {
let targetIndex;
if (restoreIndexInCellStrategy === 'index') {
targetIndex = Math.max(0, this.lastFocusedCell?.index ?? 0);
} else if (restoreIndexInCellStrategy === 'first') {
targetIndex = 0;
} else {
targetIndex = focusableElements.length - 1;
}
focusableElements[
targetIndex < focusableElements.length
? targetIndex
: focusableElements.length - 1
].focus();
return true;
}
}
} else {
const headerElement = this.thElements?.find(
item => item.colIdx === colIdx,
);
if (headerElement) {
const focusableElements = getKeyboardFocusableElements(
headerElement.el.nativeElement,
);
const focusTarget =
focusableElements.length > 0
? focusableElements[0]
: headerElement.el.nativeElement.querySelector<HTMLElement>(
'*[tabindex="-1"]',
);
if (focusTarget) {
focusTarget.focus();
}
}
}
return false;
}
/**
* Focuses the next focusable element within the currently focused cell that contains focusable elements.
* @returns true if a next element exists within the current cell otherwise returns false
* @ignore
*/
private focusNextElementInCell(): boolean {
if (!this.lastFocusedCell) {
return false;
}
if (this.lastFocusedCell.index === -1) {
return false;
}
const cell = this.findCell(
this.lastFocusedCell.cell.colIdx,
this.lastFocusedCell.cell.rowIdx,
);
if (cell) {
const focusableChildren = getKeyboardFocusableElements(
cell.el.nativeElement,
);
const nextIdx = this.lastFocusedCell.index + 1;
if (nextIdx < focusableChildren.length) {
focusableChildren[nextIdx].focus();
return true;
}
}
return false;
}
/**
* Focuses the previous focusable element within the currently focused cell that contains focusable elements.
* @returns true if a previous element exists within the current cell otherwise returns false
* @ignore
*/
private focusPreviousElementInCell(): boolean {
if (!this.lastFocusedCell) {
return false;
}
// This means the cell itself is focused
if (
this.lastFocusedCell.index === -1 ||
this.lastFocusedCell.index - 1 < 0
) {
return false;
}
const cell = this.findCell(
this.lastFocusedCell.cell.colIdx,
this.lastFocusedCell.cell.rowIdx,
);
if (cell) {
const focusableChildren = getKeyboardFocusableElements(
cell.el.nativeElement,
);
const prevElement = focusableChildren[this.lastFocusedCell.index - 1];
prevElement.focus();
return true;
}
return false;
}
/** @ignore */
private scrollToActiveCell(): void {
const focusedCell = this.tdElements?.find(i =>
i.el.nativeElement.contains(document.activeElement),
);
focusedCell?.el.nativeElement.scrollIntoView({
block: 'nearest',
inline: 'nearest',
});
}
/** @ignore */
private recomputeShowEntryCount() {
if (this.isEmpty() && !this.state.search) {
this._showEntryCount = false;
} else {
this._showEntryCount = true;
}
}
}
|