@clr/angular
Version:
Angular components for Clarity
155 lines • 22.9 kB
JavaScript
/*
* Copyright (c) 2016-2025 Broadcom. All Rights Reserved.
* The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries.
* This software is released under MIT license.
* The full license information can be found in LICENSE in the root directory of this project.
*/
import { EventEmitter, Injectable } from '@angular/core';
import { fromEvent, Subject } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
import { Keys } from '../../../utils/enums/keys.enum';
import { KeyNavigationUtils } from './key-navigation-utils';
import * as i0 from "@angular/core";
const actionableItemSelectors = [
'a[href]',
'area[href]',
'input:not([disabled])',
'button:not([disabled])',
'select:not([disabled])',
'textarea:not([disabled])',
'iframe',
'object',
'embed',
'[contenteditable=true]',
'[role=button]:not([disabled])',
];
export function getTabbableItems(el) {
const tabbableItemSelectors = [...actionableItemSelectors, '[tabindex="0"]:not([disabled])'];
const tabbableSelector = tabbableItemSelectors.join(',');
return Array.from(el.querySelectorAll(tabbableSelector));
}
function isActionableItem(el) {
const actionableSelector = actionableItemSelectors.join(',');
return el.matches(actionableSelector);
}
export class KeyNavigationGridController {
constructor(zone) {
this.zone = zone;
this.nextCellCoordsEmitter = new EventEmitter(false);
this.skipItemFocus = false;
this.preventScrollOnFocus = false;
this.config = {
keyGridRows: '[role=row]:not(.datagrid-placeholder):not([style*="display: none"])',
keyGridCells: '[role=gridcell]:not(.datagrid-hidden-column):not(.datagrid-placeholder-content), [role=columnheader]:not(.datagrid-hidden-column):not(.datagrid-placeholder-content), .datagrid-detail-caret',
keyGrid: '[role=grid]',
};
this.listenersAdded = false;
this.destroy$ = new Subject();
}
ngOnDestroy() {
this.destroy$.next();
this.destroy$.complete();
}
addListeners() {
if (this.listenersAdded) {
return;
}
this.zone.runOutsideAngular(() => {
fromEvent(this.keyNavUtils.grid, 'mousedown')
.pipe(takeUntil(this.destroy$))
.subscribe((e) => {
// preserve right click for context menus & keyboard mouse control https://apple.stackexchange.com/questions/32715/how-do-i-open-the-context-menu-from-a-mac-keyboard
if (e.buttons === 1 && !e.ctrlKey) {
const activeCell = this.keyNavUtils.cells
? Array.from(this.keyNavUtils.cells).find(c => c === e.target || c === e.target.closest(this.config.keyGridCells))
: null;
if (activeCell) {
this.setActiveCell(activeCell);
if (!isActionableItem(e.target)) {
this.focusElement(activeCell);
}
}
}
});
fromEvent(this.keyNavUtils.grid, 'wheel')
.pipe(takeUntil(this.destroy$))
.subscribe(() => {
this.nextCellCoordsEmitter.emit(null);
});
fromEvent(this.keyNavUtils.grid, 'keydown')
.pipe(takeUntil(this.destroy$))
.subscribe((e) => {
// Skip column resize events
if (e.target.classList.contains('drag-handle') &&
(e.key === Keys.ArrowLeft || e.key === Keys.ArrowRight)) {
return;
}
if (e.key === Keys.ArrowUp ||
e.key === Keys.ArrowDown ||
e.key === Keys.ArrowLeft ||
e.key === Keys.ArrowRight ||
e.key === Keys.End ||
e.key === Keys.Home ||
e.key === Keys.PageUp ||
e.key === Keys.PageDown) {
const nextCellCoords = this.keyNavUtils.getNextItemCoordinate(e);
if (nextCellCoords.y > 0 &&
(e.key === Keys.ArrowUp || e.key === Keys.ArrowDown || e.key === Keys.PageUp || e.key === Keys.PageDown)) {
this.keyNavUtils.setAriaRowIndexTo(nextCellCoords);
this.nextCellCoordsEmitter.emit(nextCellCoords);
}
const activeItem = this.keyNavUtils.rows
? Array.from(this.keyNavUtils.getCellsForRow(nextCellCoords.y))[nextCellCoords.x]
: null;
if (activeItem) {
this.setActiveCell(activeItem);
this.focusElement(activeItem, {
preventScroll: this.preventScrollOnFocus && !!nextCellCoords.ariaRowIndex,
});
}
e.preventDefault();
}
});
});
this.listenersAdded = true;
}
initializeKeyGrid(host) {
this.keyNavUtils = new KeyNavigationUtils(host, this.config);
this.addListeners();
this.resetKeyGrid();
}
resetKeyGrid() {
this.keyNavUtils.cells?.forEach((i) => i.setAttribute('tabindex', '-1'));
const firstCell = this.keyNavUtils.cells ? this.keyNavUtils.cells[0] : null;
firstCell?.setAttribute('tabindex', '0');
}
setActiveCell(activeCell) {
const prior = this.keyNavUtils.cells
? Array.from(this.keyNavUtils.cells).find(c => c.getAttribute('tabindex') === '0')
: null;
if (prior) {
prior.setAttribute('tabindex', '-1');
}
activeCell.setAttribute('tabindex', '0');
}
focusElement(activeCell, options = { preventScroll: false }) {
if (this.skipItemFocus) {
return;
}
let elementToFocus;
if (activeCell.getAttribute('role') === 'columnheader') {
elementToFocus = activeCell;
}
else {
const tabbableElements = getTabbableItems(activeCell);
elementToFocus = tabbableElements.length ? tabbableElements[0] : activeCell;
}
elementToFocus.focus(options);
}
}
KeyNavigationGridController.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: KeyNavigationGridController, deps: [{ token: i0.NgZone }], target: i0.ɵɵFactoryTarget.Injectable });
KeyNavigationGridController.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: KeyNavigationGridController });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: KeyNavigationGridController, decorators: [{
type: Injectable
}], ctorParameters: function () { return [{ type: i0.NgZone }]; } });
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* Copyright (c) 2016-2025 Broadcom. All Rights Reserved.\n * The term \"Broadcom\" refers to Broadcom Inc. and/or its subsidiaries.\n * This software is released under MIT license.\n * The full license information can be found in LICENSE in the root directory of this project.\n */\n\nimport { EventEmitter, Injectable, NgZone, OnDestroy } from '@angular/core';\nimport { fromEvent, Subject } from 'rxjs';\nimport { takeUntil } from 'rxjs/operators';\n\nimport { Keys } from '../../../utils/enums/keys.enum';\nimport { KeyNavigationUtils } from './key-navigation-utils';\n\nconst actionableItemSelectors = [\n  'a[href]',\n  'area[href]',\n  'input:not([disabled])',\n  'button:not([disabled])',\n  'select:not([disabled])',\n  'textarea:not([disabled])',\n  'iframe',\n  'object',\n  'embed',\n  '[contenteditable=true]',\n  '[role=button]:not([disabled])',\n];\n\nexport function getTabbableItems(el: HTMLElement) {\n  const tabbableItemSelectors = [...actionableItemSelectors, '[tabindex=\"0\"]:not([disabled])'];\n  const tabbableSelector = tabbableItemSelectors.join(',');\n  return Array.from(el.querySelectorAll(tabbableSelector)) as HTMLElement[];\n}\n\nfunction isActionableItem(el: HTMLElement) {\n  const actionableSelector = actionableItemSelectors.join(',');\n  return el.matches(actionableSelector);\n}\n\nexport interface KeyNavigationGridConfig {\n  keyGrid: string;\n  keyGridRows: string;\n  keyGridCells: string;\n}\n\nexport interface CellCoordinates {\n  x: number;\n  y: number;\n  ariaRowIndex?: string;\n}\n\n@Injectable()\nexport class KeyNavigationGridController implements OnDestroy {\n  nextCellCoordsEmitter = new EventEmitter<CellCoordinates>(false);\n\n  skipItemFocus = false;\n  preventScrollOnFocus = false;\n\n  config: KeyNavigationGridConfig = {\n    keyGridRows: '[role=row]:not(.datagrid-placeholder):not([style*=\"display: none\"])',\n    keyGridCells:\n      '[role=gridcell]:not(.datagrid-hidden-column):not(.datagrid-placeholder-content), [role=columnheader]:not(.datagrid-hidden-column):not(.datagrid-placeholder-content), .datagrid-detail-caret',\n    keyGrid: '[role=grid]',\n  };\n  private keyNavUtils: KeyNavigationUtils;\n  private listenersAdded = false;\n  private destroy$ = new Subject<void>();\n\n  constructor(private zone: NgZone) {}\n\n  ngOnDestroy(): void {\n    this.destroy$.next();\n    this.destroy$.complete();\n  }\n\n  addListeners() {\n    if (this.listenersAdded) {\n      return;\n    }\n\n    this.zone.runOutsideAngular(() => {\n      fromEvent(this.keyNavUtils.grid, 'mousedown')\n        .pipe(takeUntil(this.destroy$))\n        .subscribe((e: MouseEvent) => {\n          // preserve right click for context menus & keyboard mouse control https://apple.stackexchange.com/questions/32715/how-do-i-open-the-context-menu-from-a-mac-keyboard\n          if (e.buttons === 1 && !e.ctrlKey) {\n            const activeCell = this.keyNavUtils.cells\n              ? Array.from(this.keyNavUtils.cells).find(\n                  c => c === e.target || c === (e.target as HTMLElement).closest(this.config.keyGridCells)\n                )\n              : null;\n            if (activeCell) {\n              this.setActiveCell(activeCell);\n\n              if (!isActionableItem(e.target as HTMLElement)) {\n                this.focusElement(activeCell);\n              }\n            }\n          }\n        });\n\n      fromEvent(this.keyNavUtils.grid, 'wheel')\n        .pipe(takeUntil(this.destroy$))\n        .subscribe(() => {\n          this.nextCellCoordsEmitter.emit(null);\n        });\n\n      fromEvent(this.keyNavUtils.grid, 'keydown')\n        .pipe(takeUntil(this.destroy$))\n        .subscribe((e: KeyboardEvent) => {\n          // Skip column resize events\n          if (\n            (e.target as HTMLElement).classList.contains('drag-handle') &&\n            (e.key === Keys.ArrowLeft || e.key === Keys.ArrowRight)\n          ) {\n            return;\n          }\n          if (\n            e.key === Keys.ArrowUp ||\n            e.key === Keys.ArrowDown ||\n            e.key === Keys.ArrowLeft ||\n            e.key === Keys.ArrowRight ||\n            e.key === Keys.End ||\n            e.key === Keys.Home ||\n            e.key === Keys.PageUp ||\n            e.key === Keys.PageDown\n          ) {\n            const nextCellCoords = this.keyNavUtils.getNextItemCoordinate(e);\n\n            if (\n              nextCellCoords.y > 0 &&\n              (e.key === Keys.ArrowUp || e.key === Keys.ArrowDown || e.key === Keys.PageUp || e.key === Keys.PageDown)\n            ) {\n              this.keyNavUtils.setAriaRowIndexTo(nextCellCoords);\n\n              this.nextCellCoordsEmitter.emit(nextCellCoords);\n            }\n\n            const activeItem = this.keyNavUtils.rows\n              ? (Array.from(this.keyNavUtils.getCellsForRow(nextCellCoords.y))[nextCellCoords.x] as HTMLElement)\n              : null;\n\n            if (activeItem) {\n              this.setActiveCell(activeItem);\n              this.focusElement(activeItem, {\n                preventScroll: this.preventScrollOnFocus && !!nextCellCoords.ariaRowIndex,\n              });\n            }\n\n            e.preventDefault();\n          }\n        });\n    });\n    this.listenersAdded = true;\n  }\n\n  initializeKeyGrid(host: HTMLElement) {\n    this.keyNavUtils = new KeyNavigationUtils(host, this.config);\n    this.addListeners();\n    this.resetKeyGrid();\n  }\n\n  resetKeyGrid() {\n    this.keyNavUtils.cells?.forEach((i: HTMLElement) => i.setAttribute('tabindex', '-1'));\n    const firstCell = this.keyNavUtils.cells ? this.keyNavUtils.cells[0] : null;\n    firstCell?.setAttribute('tabindex', '0');\n  }\n\n  setActiveCell(activeCell: HTMLElement) {\n    const prior = this.keyNavUtils.cells\n      ? Array.from(this.keyNavUtils.cells).find(c => c.getAttribute('tabindex') === '0')\n      : null;\n\n    if (prior) {\n      prior.setAttribute('tabindex', '-1');\n    }\n\n    activeCell.setAttribute('tabindex', '0');\n  }\n\n  focusElement(activeCell: HTMLElement, options: FocusOptions = { preventScroll: false }) {\n    if (this.skipItemFocus) {\n      return;\n    }\n\n    let elementToFocus: HTMLElement;\n\n    if (activeCell.getAttribute('role') === 'columnheader') {\n      elementToFocus = activeCell;\n    } else {\n      const tabbableElements = getTabbableItems(activeCell);\n      elementToFocus = tabbableElements.length ? tabbableElements[0] : activeCell;\n    }\n\n    elementToFocus.focus(options);\n  }\n}\n"]}