108 lines
2.4 KiB
JavaScript
108 lines
2.4 KiB
JavaScript
import Modifier from 'ember-modifier';
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import { inject as service } from '@ember/service';
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import { action } from '@ember/object';
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const TAB = 9;
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const ESC = 27;
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const END = 35;
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const HOME = 36;
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const ARROW_UP = 38;
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const ARROW_DOWN = 40;
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const keys = {
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vertical: {
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[ARROW_DOWN]: ($items, i = -1) => {
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return (i + 1) % $items.length;
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},
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[ARROW_UP]: ($items, i = 0) => {
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if (i === 0) {
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return $items.length - 1;
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} else {
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return i - 1;
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}
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},
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[HOME]: ($items, i) => {
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return 0;
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},
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[END]: ($items, i) => {
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return $items.length - 1;
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},
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},
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horizontal: {},
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};
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const MENU_ITEMS = '[role^="menuitem"]';
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export default class AriaMenuModifier extends Modifier {
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@service('-document') doc;
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orientation = 'vertical';
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@action
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async keydown(e) {
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if (e.keyCode === ESC) {
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this.options.onclose(e);
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this.$trigger.focus();
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return;
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}
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const $items = [...this.element.querySelectorAll(MENU_ITEMS)];
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const pos = $items.findIndex(($item) => $item === this.doc.activeElement);
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if (e.keyCode === TAB) {
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if (e.shiftKey) {
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if (pos === 0) {
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this.options.onclose(e);
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this.$trigger.focus();
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}
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} else {
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if (pos === $items.length - 1) {
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await new Promise((resolve) => setTimeout(resolve, 0));
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this.options.onclose(e);
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}
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}
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return;
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}
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if (typeof keys[this.orientation][e.keyCode] === 'undefined') {
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return;
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}
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$items[keys[this.orientation][e.keyCode]($items, pos)].focus();
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e.stopPropagation();
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e.preventDefault();
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}
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@action
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async focus(e) {
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if (e.pointerType === '') {
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await Promise.resolve();
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this.keydown({
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keyCode: HOME,
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stopPropagation: () => {},
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preventDefault: () => {},
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});
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}
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}
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connect(params, named) {
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this.$trigger = this.doc.getElementById(this.element.getAttribute('aria-labelledby'));
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if (typeof named.openEvent !== 'undefined') {
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this.focus(named.openEvent);
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}
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this.doc.addEventListener('keydown', this.keydown);
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}
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disconnect() {
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this.doc.removeEventListener('keydown', this.keydown);
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}
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didReceiveArguments() {
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this.params = this.args.positional;
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this.options = this.args.named;
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}
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didInstall() {
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this.connect(this.args.positional, this.args.named);
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}
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willRemove() {
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this.disconnect();
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}
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}
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