63 lines
1.8 KiB
JavaScript
63 lines
1.8 KiB
JavaScript
import Component from '@ember/component';
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import { action } from '@ember/object';
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import { run } from '@ember/runloop';
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import { classNames } from '@ember-decorators/component';
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import classic from 'ember-classic-decorator';
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const TAB = 9;
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const ARROW_DOWN = 40;
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const FOCUSABLE = [
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'a:not([disabled])',
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'button:not([disabled])',
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'input:not([disabled]):not([type="hidden"])',
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'textarea:not([disabled])',
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'[tabindex]:not([disabled]):not([tabindex="-1"])',
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].join(', ');
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@classic
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@classNames('popover')
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export default class PopoverMenu extends Component {
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triggerClass = '';
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isOpen = false;
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isDisabled = false;
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label = '';
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dropdown = null;
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capture(dropdown) {
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// It's not a good idea to grab a dropdown reference like this, but it's necessary
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// in order to invoke dropdown.actions.close in traverseList as well as
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// dropdown.actions.reposition when the label or selection length changes.
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this.set('dropdown', dropdown);
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}
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didReceiveAttrs() {
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super.didReceiveAttrs();
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const dropdown = this.dropdown;
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if (this.isOpen && dropdown) {
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run.scheduleOnce('afterRender', this, this.repositionDropdown);
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}
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}
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repositionDropdown() {
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this.dropdown.actions.reposition();
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}
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@action
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openOnArrowDown(dropdown, e) {
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if (!this.isOpen && e.keyCode === ARROW_DOWN) {
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dropdown.actions.open(e);
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e.preventDefault();
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} else if (this.isOpen && (e.keyCode === TAB || e.keyCode === ARROW_DOWN)) {
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const optionsId = this.element.querySelector('.popover-trigger').getAttribute('aria-owns');
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const popoverContentEl = document.querySelector(`#${optionsId}`);
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const firstFocusableElement = popoverContentEl.querySelector(FOCUSABLE);
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if (firstFocusableElement) {
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firstFocusableElement.focus();
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e.preventDefault();
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}
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}
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}
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}
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