2022-02-26 15:48:56 +00:00
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import { html, LitElement } from 'lit';
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2022-03-15 21:42:59 +00:00
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import { customElement, property, query, state } from 'lit/decorators.js';
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2021-09-29 12:40:26 +00:00
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import { classMap } from 'lit/directives/class-map.js';
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2022-03-24 11:48:03 +00:00
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import '~/components/button-group/button-group';
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import type SlRadio from '~/components/radio/radio';
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2021-07-10 00:45:44 +00:00
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import styles from './radio-group.styles';
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2021-04-09 12:15:33 +00:00
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2022-03-15 21:42:59 +00:00
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const RADIO_CHILDREN = ['sl-radio', 'sl-radio-button'];
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2021-04-09 12:15:33 +00:00
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/**
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* @since 2.0
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* @status stable
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*
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2022-03-15 21:42:59 +00:00
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* @dependency sl-button-group
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*
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2021-06-25 20:25:46 +00:00
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* @slot - The default slot where radio controls are placed.
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* @slot label - The radio group label. Required for proper accessibility. Alternatively, you can use the label prop.
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2021-04-09 12:15:33 +00:00
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*
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2022-03-09 20:54:18 +00:00
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* @csspart base - The component's internal wrapper.
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2022-03-15 21:42:59 +00:00
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* @csspart label - The radio group's label.
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* @csspart button-group - The button group that wraps radio buttons.
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* @csspart button-group__base - The button group's `base` part.
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2021-04-09 12:15:33 +00:00
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*/
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@customElement('sl-radio-group')
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export default class SlRadioGroup extends LitElement {
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2021-07-10 00:45:44 +00:00
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static styles = styles;
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2021-04-09 12:15:33 +00:00
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2021-07-12 14:48:38 +00:00
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@query('slot:not([name])') defaultSlot: HTMLSlotElement;
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2022-03-15 21:42:59 +00:00
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@state() hasButtonGroup = false;
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2021-04-09 12:15:33 +00:00
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/** The radio group label. Required for proper accessibility. Alternatively, you can use the label slot. */
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2021-07-01 00:04:46 +00:00
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@property() label = '';
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2021-04-09 12:15:33 +00:00
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2021-08-27 13:00:01 +00:00
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/** Shows the fieldset and legend that surrounds the radio group. */
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@property({ type: Boolean, attribute: 'fieldset' }) fieldset = false;
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2021-04-09 12:15:33 +00:00
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2022-03-14 21:47:02 +00:00
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connectedCallback() {
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super.connectedCallback();
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this.setAttribute('role', 'radiogroup');
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}
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getAllRadios() {
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return [...this.querySelectorAll(RADIO_CHILDREN.join(','))].filter(el =>
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RADIO_CHILDREN.includes(el.tagName.toLowerCase())
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) as SlRadio[];
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2022-03-14 21:47:02 +00:00
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}
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handleRadioClick(event: MouseEvent) {
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const target = event.target as HTMLElement;
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2022-03-15 21:42:59 +00:00
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const checkedRadio = target.closest(RADIO_CHILDREN.map(selector => `${selector}:not([disabled])`).join(','));
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2022-03-14 21:47:02 +00:00
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if (checkedRadio) {
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const radios = this.getAllRadios();
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radios.forEach(radio => {
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radio.checked = radio === checkedRadio;
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radio.input.tabIndex = radio === checkedRadio ? 0 : -1;
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});
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}
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}
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handleKeyDown(event: KeyboardEvent) {
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if (['ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight'].includes(event.key)) {
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const radios = this.getAllRadios().filter(radio => !radio.disabled);
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const checkedRadio = radios.find(radio => radio.checked) ?? radios[0];
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const incr = ['ArrowUp', 'ArrowLeft'].includes(event.key) ? -1 : 1;
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let index = radios.indexOf(checkedRadio) + incr;
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if (index < 0) {
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index = radios.length - 1;
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}
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if (index > radios.length - 1) {
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index = 0;
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}
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2022-03-14 21:47:02 +00:00
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this.getAllRadios().forEach(radio => {
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radio.checked = false;
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radio.input.tabIndex = -1;
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});
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radios[index].focus();
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radios[index].checked = true;
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radios[index].input.tabIndex = 0;
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event.preventDefault();
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}
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}
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handleSlotChange() {
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const radios = this.getAllRadios();
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const checkedRadio = radios.find(radio => radio.checked);
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2022-03-15 21:42:59 +00:00
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this.hasButtonGroup = !!radios.find(radio => radio.tagName.toLowerCase() === 'sl-radio-button');
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2022-03-14 21:47:02 +00:00
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radios.forEach(radio => {
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radio.setAttribute('role', 'radio');
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radio.input.tabIndex = -1;
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2021-08-10 21:24:52 +00:00
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});
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2022-03-14 21:47:02 +00:00
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if (checkedRadio) {
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checkedRadio.input.tabIndex = 0;
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} else if (radios.length > 0) {
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radios[0].input.tabIndex = 0;
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}
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2021-07-12 14:48:38 +00:00
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}
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2021-04-09 12:15:33 +00:00
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render() {
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2022-03-15 21:42:59 +00:00
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const defaultSlot = html`
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<slot @click=${this.handleRadioClick} @keydown=${this.handleKeyDown} @slotchange=${this.handleSlotChange}></slot>
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`;
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2021-04-09 12:15:33 +00:00
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return html`
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<fieldset
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part="base"
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class=${classMap({
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'radio-group': true,
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2021-08-27 13:00:01 +00:00
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'radio-group--has-fieldset': this.fieldset
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2021-04-09 12:15:33 +00:00
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})}
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>
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<legend part="label" class="radio-group__label">
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<slot name="label">${this.label}</slot>
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</legend>
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2022-03-15 21:42:59 +00:00
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${this.hasButtonGroup
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? html`<sl-button-group part="button-group">${defaultSlot}</sl-button-group>`
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: defaultSlot}
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2021-04-09 12:15:33 +00:00
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</fieldset>
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`;
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}
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}
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declare global {
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interface HTMLElementTagNameMap {
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'sl-radio-group': SlRadioGroup;
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}
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}
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