@clr/angular
Version:
Angular components for Clarity
172 lines • 24.9 kB
JavaScript
/*
* Copyright (c) 2016-2023 VMware, Inc. All Rights Reserved.
* This software is released under MIT license.
* The full license information can be found in LICENSE in the root directory of this project.
*/
import { Injectable } from '@angular/core';
import { fromEvent, Subject } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
import * as i0 from "@angular/core";
export function getTabableItems(el) {
const tabableSelector = [
'a[href]',
'area[href]',
'input:not([disabled])',
'button:not([disabled])',
'select:not([disabled])',
'textarea:not([disabled])',
'iframe',
'object',
'embed',
'*[tabindex]',
'*[contenteditable=true]',
'[role=button]:not([disabled])',
].join(',');
return Array.from(el.querySelectorAll(tabableSelector));
}
export class KeyNavigationGridController {
constructor(zone) {
this.zone = zone;
this.listenersAdded = false;
this.destroy$ = new Subject();
this.config = {
keyGridRows: '[role=row]:not(.datagrid-placeholder)',
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]',
};
}
get grid() {
return this.host?.querySelector(this.config.keyGrid);
}
get rows() {
return this.host?.querySelectorAll(this.config.keyGridRows);
}
get cells() {
return this.host?.querySelectorAll(this.config.keyGridCells);
}
ngOnDestroy() {
this.destroy$.next();
this.destroy$.complete();
}
addListeners() {
if (this.listenersAdded) {
return;
}
this.zone.runOutsideAngular(() => {
fromEvent(this.grid, 'mousedown')
.pipe(takeUntil(this.destroy$))
.subscribe((e) => {
// preserve right click for context menus & keyboard mouse control https://apple.stackexchange.com/questions/32715/how-do-i-open-the-context-menu-from-a-mac-keyboard
if (e.buttons === 1 && !e.ctrlKey) {
const activeCell = this.cells
? Array.from(this.cells).find(c => c === e.target || c === e.target.closest(this.config.keyGridCells))
: null;
if (activeCell) {
this.setActiveCell(activeCell);
}
}
});
fromEvent(this.grid, 'keydown')
.pipe(takeUntil(this.destroy$))
.subscribe((e) => {
// Skip column resize events
if (e.target.classList.contains('drag-handle') &&
(e.code === 'ArrowLeft' || e.code === 'ArrowRight')) {
return;
}
if (e.code === 'ArrowUp' ||
e.code === 'ArrowDown' ||
e.code === 'ArrowLeft' ||
e.code === 'ArrowRight' ||
e.code === 'End' ||
e.code === 'Home' ||
e.code === 'PageUp' ||
e.code === 'PageDown') {
const { x, y } = this.getNextItemCoordinate(e);
const activeItem = this.rows
? Array.from(this.rows[y].querySelectorAll(this.config.keyGridCells))[x]
: null;
if (activeItem) {
this.setActiveCell(activeItem);
}
e.preventDefault();
}
});
});
this.listenersAdded = true;
}
initializeKeyGrid(host) {
this.host = host;
this.addListeners();
this.resetKeyGrid();
}
resetKeyGrid() {
this.cells?.forEach((i) => i.setAttribute('tabindex', '-1'));
const firstCell = this.cells ? this.cells[0] : null;
firstCell?.setAttribute('tabindex', '0');
}
setActiveCell(activeCell) {
const prior = this.cells ? Array.from(this.cells).find(c => c.getAttribute('tabindex') === '0') : null;
if (prior) {
prior.setAttribute('tabindex', '-1');
}
activeCell.setAttribute('tabindex', '0');
const items = getTabableItems(activeCell);
const item = activeCell.getAttribute('role') !== 'columnheader' && items[0] ? items[0] : activeCell;
item.focus();
}
getNextItemCoordinate(e) {
let currentCell = this.cells ? Array.from(this.cells).find(i => i.getAttribute('tabindex') === '0') : null;
if (e.code === 'Tab') {
currentCell = document.activeElement;
}
const currentRow = this.rows && currentCell ? Array.from(this.rows).find(r => r.contains(currentCell)) : null;
const numOfRows = this.rows ? this.rows.length - 1 : 0;
const numOfColumns = this.cells ? this.cells.length / this.rows.length - 1 : 0;
let x = currentRow && currentCell
? Array.from(currentRow.querySelectorAll(this.config.keyGridCells)).indexOf(currentCell)
: 0;
let y = currentRow && currentCell && this.rows ? Array.from(this.rows).indexOf(currentRow) : 0;
const dir = this.host.dir;
const inlineStart = dir === 'rtl' ? 'ArrowRight' : 'ArrowLeft';
const inlineEnd = dir === 'rtl' ? 'ArrowLeft' : 'ArrowRight';
const itemsPerPage = Math.floor(this.host?.querySelector('.datagrid').clientHeight / this.rows[0].clientHeight) - 1 || 0;
if (e.code === 'ArrowUp' && y !== 0) {
y = y - 1;
}
else if (e.code === 'ArrowDown' && y < numOfRows) {
y = y + 1;
}
else if (e.code === inlineStart && x !== 0) {
x = x - 1;
}
else if (e.code === inlineEnd && x < numOfColumns) {
x = x + 1;
}
else if (e.code === 'End') {
x = numOfColumns;
if (e.ctrlKey) {
y = numOfRows;
}
}
else if (e.code === 'Home') {
x = 0;
if (e.ctrlKey) {
y = 0;
}
}
else if (e.code === 'PageUp') {
y = y - itemsPerPage > 0 ? y - itemsPerPage : 0;
}
else if (e.code === 'PageDown') {
y = y + itemsPerPage < numOfRows ? y + itemsPerPage : numOfRows;
}
return { x, y };
}
}
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) 2016-2023 VMware, Inc. All Rights Reserved.\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 { Injectable, NgZone, OnDestroy } from '@angular/core';\nimport { fromEvent, Subject } from 'rxjs';\nimport { takeUntil } from 'rxjs/operators';\n\nexport function getTabableItems(el: HTMLElement) {\n  const tabableSelector = [\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    '*[tabindex]',\n    '*[contenteditable=true]',\n    '[role=button]:not([disabled])',\n  ].join(',');\n  return Array.from(el.querySelectorAll(tabableSelector)) as HTMLElement[];\n}\n\nexport interface KeyNavigationGridConfig {\n  keyGrid: string;\n  keyGridRows: string;\n  keyGridCells: string;\n}\n\n@Injectable()\nexport class KeyNavigationGridController implements OnDestroy {\n  private host: HTMLElement;\n  private config: KeyNavigationGridConfig;\n  private listenersAdded = false;\n  private destroy$ = new Subject<void>();\n\n  constructor(private zone: NgZone) {\n    this.config = {\n      keyGridRows: '[role=row]:not(.datagrid-placeholder)',\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  }\n\n  private get grid() {\n    return this.host?.querySelector(this.config.keyGrid);\n  }\n\n  private get rows() {\n    return this.host?.querySelectorAll(this.config.keyGridRows) as NodeListOf<HTMLElement>;\n  }\n\n  private get cells() {\n    return this.host?.querySelectorAll(this.config.keyGridCells) as NodeListOf<HTMLElement>;\n  }\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.grid, 'mousedown')\n        .pipe(takeUntil(this.destroy$))\n        .subscribe((e: MouseEvent) => {\n          // preserve right click for context menus & keyboard mouse control https://apple.stackexchange.com/questions/32715/how-do-i-open-the-context-menu-from-a-mac-keyboard\n          if (e.buttons === 1 && !e.ctrlKey) {\n            const activeCell = this.cells\n              ? Array.from(this.cells).find(\n                  c => c === e.target || c === (e.target as HTMLElement).closest(this.config.keyGridCells)\n                )\n              : null;\n            if (activeCell) {\n              this.setActiveCell(activeCell);\n            }\n          }\n        });\n\n      fromEvent(this.grid, 'keydown')\n        .pipe(takeUntil(this.destroy$))\n        .subscribe((e: KeyboardEvent) => {\n          // Skip column resize events\n          if (\n            (e.target as HTMLElement).classList.contains('drag-handle') &&\n            (e.code === 'ArrowLeft' || e.code === 'ArrowRight')\n          ) {\n            return;\n          }\n          if (\n            e.code === 'ArrowUp' ||\n            e.code === 'ArrowDown' ||\n            e.code === 'ArrowLeft' ||\n            e.code === 'ArrowRight' ||\n            e.code === 'End' ||\n            e.code === 'Home' ||\n            e.code === 'PageUp' ||\n            e.code === 'PageDown'\n          ) {\n            const { x, y } = this.getNextItemCoordinate(e);\n            const activeItem = this.rows\n              ? (Array.from(this.rows[y].querySelectorAll(this.config.keyGridCells))[x] as HTMLElement)\n              : null;\n            if (activeItem) {\n              this.setActiveCell(activeItem);\n            }\n            e.preventDefault();\n          }\n        });\n    });\n    this.listenersAdded = true;\n  }\n\n  initializeKeyGrid(host: HTMLElement) {\n    this.host = host;\n    this.addListeners();\n    this.resetKeyGrid();\n  }\n\n  resetKeyGrid() {\n    this.cells?.forEach((i: HTMLElement) => i.setAttribute('tabindex', '-1'));\n    const firstCell = this.cells ? this.cells[0] : null;\n    firstCell?.setAttribute('tabindex', '0');\n  }\n\n  private setActiveCell(activeCell: HTMLElement) {\n    const prior = this.cells ? Array.from(this.cells).find(c => c.getAttribute('tabindex') === '0') : null;\n\n    if (prior) {\n      prior.setAttribute('tabindex', '-1');\n    }\n\n    activeCell.setAttribute('tabindex', '0');\n\n    const items = getTabableItems(activeCell);\n    const item = activeCell.getAttribute('role') !== 'columnheader' && items[0] ? items[0] : activeCell;\n    item.focus();\n  }\n\n  private getNextItemCoordinate(e: any) {\n    let currentCell = this.cells ? Array.from(this.cells).find(i => i.getAttribute('tabindex') === '0') : null;\n    if (e.code === 'Tab') {\n      currentCell = document.activeElement as HTMLElement;\n    }\n    const currentRow = this.rows && currentCell ? Array.from(this.rows).find(r => r.contains(currentCell)) : null;\n    const numOfRows = this.rows ? this.rows.length - 1 : 0;\n    const numOfColumns = this.cells ? this.cells.length / this.rows.length - 1 : 0;\n\n    let x =\n      currentRow && currentCell\n        ? Array.from(currentRow.querySelectorAll(this.config.keyGridCells)).indexOf(currentCell)\n        : 0;\n    let y = currentRow && currentCell && this.rows ? Array.from(this.rows).indexOf(currentRow) : 0;\n\n    const dir = this.host.dir;\n    const inlineStart = dir === 'rtl' ? 'ArrowRight' : 'ArrowLeft';\n    const inlineEnd = dir === 'rtl' ? 'ArrowLeft' : 'ArrowRight';\n\n    const itemsPerPage =\n      Math.floor(this.host?.querySelector('.datagrid').clientHeight / this.rows[0].clientHeight) - 1 || 0;\n\n    if (e.code === 'ArrowUp' && y !== 0) {\n      y = y - 1;\n    } else if (e.code === 'ArrowDown' && y < numOfRows) {\n      y = y + 1;\n    } else if (e.code === inlineStart && x !== 0) {\n      x = x - 1;\n    } else if (e.code === inlineEnd && x < numOfColumns) {\n      x = x + 1;\n    } else if (e.code === 'End') {\n      x = numOfColumns;\n\n      if (e.ctrlKey) {\n        y = numOfRows;\n      }\n    } else if (e.code === 'Home') {\n      x = 0;\n\n      if (e.ctrlKey) {\n        y = 0;\n      }\n    } else if (e.code === 'PageUp') {\n      y = y - itemsPerPage > 0 ? y - itemsPerPage : 0;\n    } else if (e.code === 'PageDown') {\n      y = y + itemsPerPage < numOfRows ? y + itemsPerPage : numOfRows;\n    }\n\n    return { x, y };\n  }\n}\n"]}