@clr/angular
Version:
Angular components for Clarity
97 lines • 13 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 { Injectable } from '@angular/core';
import { Linkers } from '../../utils/focus/focusable-item/linkers';
import { InitialFocus } from './button-group-focus.enum';
import * as i0 from "@angular/core";
import * as i1 from "../../utils/focus/focus.service";
import * as i2 from "../../utils";
export class ButtonGroupFocusHandler {
constructor(focusService, toggleService, renderer) {
this.focusService = focusService;
this.toggleService = toggleService;
this.renderer = renderer;
this.initialFocus = InitialFocus.FIRST_ITEM;
this._unlistenFuncs = [];
}
ngOnDestroy() {
this._unlistenFuncs.forEach((unlisten) => unlisten());
this.focusService.detachListeners();
}
initialize({ menu, menuToggle }) {
this.menu = menu;
this.menuToggle = menuToggle;
this.focusService.registerContainer(this.menu, '-1');
this.listenToKeys();
this.linkButtons();
switch (this.initialFocus) {
case InitialFocus.LAST_ITEM:
this.focusLastItem();
break;
default:
this.focusFirstItem();
break;
}
}
resetButtonsFocus() {
this.buttons.forEach(button => {
button.blur();
});
}
listenToKeys() {
this._unlistenFuncs.push(this.renderer.listen(this.menu, 'keydown.shift.tab', event => this.closeMenu(event, false)));
this._unlistenFuncs.push(this.renderer.listen(this.menu, 'keydown.tab', event => this.closeMenu(event, true)));
}
closeMenu(event, focusBackOnToggle) {
this.toggleService.toggleWithEvent(event);
if (focusBackOnToggle) {
this.menuToggle.focus();
}
this.resetButtonsFocus();
}
linkButtons() {
const buttonElements = Array.from(this.menu.children);
this.buttons = buttonElements.map(buttonElement => {
this._unlistenFuncs.push(this.renderer.listen(buttonElement, 'click', event => this.closeMenu(event, true)));
return {
id: buttonElement.id,
value: buttonElement,
focus: () => {
buttonElement.setAttribute('tabindex', '0');
buttonElement.focus();
},
blur: () => {
buttonElement.setAttribute('tabindex', '-1');
buttonElement.blur();
},
};
});
this.resetButtonsFocus();
Linkers.linkVertical(this.buttons);
}
focusFirstItem() {
if (this.buttons.length) {
this.focusService.moveTo(this.buttons[0]);
}
this.initialFocus = InitialFocus.FIRST_ITEM;
}
focusLastItem() {
if (this.buttons.length) {
this.focusService.moveTo(this.buttons[this.buttons.length - 1]);
}
this.initialFocus = InitialFocus.FIRST_ITEM;
}
}
ButtonGroupFocusHandler.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: ButtonGroupFocusHandler, deps: [{ token: i1.FocusService }, { token: i2.ClrPopoverToggleService }, { token: i0.Renderer2 }], target: i0.ɵɵFactoryTarget.Injectable });
ButtonGroupFocusHandler.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: ButtonGroupFocusHandler });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.2.2", ngImport: i0, type: ButtonGroupFocusHandler, decorators: [{
type: Injectable
}], ctorParameters: function () { return [{ type: i1.FocusService }, { type: i2.ClrPopoverToggleService }, { type: i0.Renderer2 }]; } });
export const BUTTON_GROUP_FOCUS_HANDLER_PROVIDER = {
provide: ButtonGroupFocusHandler,
};
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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 { Injectable, Renderer2 } from '@angular/core';\n\nimport { ClrPopoverToggleService } from '../../utils';\nimport { FocusService } from '../../utils/focus/focus.service';\nimport { FocusableItem } from '../../utils/focus/focusable-item/focusable-item';\nimport { Linkers } from '../../utils/focus/focusable-item/linkers';\nimport { InitialFocus } from './button-group-focus.enum';\n\n@Injectable()\nexport class ButtonGroupFocusHandler {\n  initialFocus: InitialFocus = InitialFocus.FIRST_ITEM;\n\n  private menu: HTMLElement;\n  private menuToggle: HTMLElement;\n  private buttons: FocusableItem[];\n  private _unlistenFuncs: (() => void)[] = [];\n\n  constructor(\n    private focusService: FocusService,\n    private toggleService: ClrPopoverToggleService,\n    private renderer: Renderer2\n  ) {}\n\n  ngOnDestroy() {\n    this._unlistenFuncs.forEach((unlisten: () => void) => unlisten());\n    this.focusService.detachListeners();\n  }\n\n  initialize({ menu, menuToggle }: { menu: HTMLElement; menuToggle: HTMLElement }) {\n    this.menu = menu;\n    this.menuToggle = menuToggle;\n\n    this.focusService.registerContainer(this.menu, '-1');\n    this.listenToKeys();\n    this.linkButtons();\n\n    switch (this.initialFocus) {\n      case InitialFocus.LAST_ITEM:\n        this.focusLastItem();\n        break;\n      default:\n        this.focusFirstItem();\n        break;\n    }\n  }\n\n  private resetButtonsFocus() {\n    this.buttons.forEach(button => {\n      button.blur();\n    });\n  }\n\n  private listenToKeys() {\n    this._unlistenFuncs.push(\n      this.renderer.listen(this.menu, 'keydown.shift.tab', event => this.closeMenu(event, false))\n    );\n    this._unlistenFuncs.push(this.renderer.listen(this.menu, 'keydown.tab', event => this.closeMenu(event, true)));\n  }\n\n  private closeMenu(event: KeyboardEvent, focusBackOnToggle: boolean) {\n    this.toggleService.toggleWithEvent(event);\n    if (focusBackOnToggle) {\n      this.menuToggle.focus();\n    }\n    this.resetButtonsFocus();\n  }\n\n  private linkButtons() {\n    const buttonElements = Array.from(this.menu.children) as HTMLElement[];\n    this.buttons = buttonElements.map<FocusableItem>(buttonElement => {\n      this._unlistenFuncs.push(this.renderer.listen(buttonElement, 'click', event => this.closeMenu(event, true)));\n      return {\n        id: buttonElement.id,\n        value: buttonElement,\n        focus: () => {\n          buttonElement.setAttribute('tabindex', '0');\n          buttonElement.focus();\n        },\n        blur: () => {\n          buttonElement.setAttribute('tabindex', '-1');\n          buttonElement.blur();\n        },\n      };\n    });\n    this.resetButtonsFocus();\n    Linkers.linkVertical(this.buttons);\n  }\n\n  private focusFirstItem(): void {\n    if (this.buttons.length) {\n      this.focusService.moveTo(this.buttons[0]);\n    }\n    this.initialFocus = InitialFocus.FIRST_ITEM;\n  }\n\n  private focusLastItem(): void {\n    if (this.buttons.length) {\n      this.focusService.moveTo(this.buttons[this.buttons.length - 1]);\n    }\n    this.initialFocus = InitialFocus.FIRST_ITEM;\n  }\n}\n\nexport const BUTTON_GROUP_FOCUS_HANDLER_PROVIDER = {\n  provide: ButtonGroupFocusHandler,\n};\n"]}