2021-07-10 00:45:44 +00:00
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import { LitElement, html } from 'lit';
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2021-05-27 21:00:43 +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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2021-07-10 00:45:44 +00:00
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import styles from './tab-group.styles';
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2022-01-16 05:47:14 +00:00
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import '~/components/icon-button/icon-button';
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import type SlTabPanel from '~/components/tab-panel/tab-panel';
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import type SlTab from '~/components/tab/tab';
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import { emit } from '~/internal/event';
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import { getOffset } from '~/internal/offset';
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import { scrollIntoView } from '~/internal/scroll';
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import { watch } from '~/internal/watch';
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import { LocalizeController } from '~/utilities/localize';
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2021-07-12 14:36:06 +00:00
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2020-07-15 21:30:37 +00:00
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/**
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2020-07-17 10:09:10 +00:00
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* @since 2.0
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2020-07-15 21:30:37 +00:00
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* @status stable
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*
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2021-02-26 14:09:13 +00:00
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* @dependency sl-icon-button
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*
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2021-06-25 20:25:46 +00:00
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* @slot - Used for grouping tab panels in the tab group.
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* @slot nav - Used for grouping tabs in the tab group.
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2020-07-15 21:30:37 +00:00
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*
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* @event {{ name: String }} sl-tab-show - Emitted when a tab is shown.
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* @event {{ name: String }} sl-tab-hide - Emitted when a tab is hidden.
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2021-05-17 22:04:28 +00:00
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*
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* @csspart base - The component's base wrapper.
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* @csspart nav - The tab group navigation container.
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* @csspart tabs - The container that wraps the slotted tabs.
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* @csspart active-tab-indicator - An element that displays the currently selected tab. This is a child of the tabs container.
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* @csspart body - The tab group body where tab panels are slotted in.
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* @csspart scroll-button - The previous and next scroll buttons that appear when tabs are scrollable.
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*
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* @cssproperty --indicator-color - The color of the active tab indicator.
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* @cssproperty --track-color - The color of the indicator's track (i.e. the line that separates tabs from panels).
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2020-07-15 21:30:37 +00:00
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*/
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2021-03-18 13:04:23 +00:00
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@customElement('sl-tab-group')
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2021-03-09 00:14:32 +00:00
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export default class SlTabGroup extends LitElement {
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static styles = styles;
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private readonly localize = new LocalizeController(this);
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@query('.tab-group') tabGroup: HTMLElement;
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@query('.tab-group__body') body: HTMLElement;
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@query('.tab-group__nav') nav: HTMLElement;
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@query('.tab-group__indicator') indicator: HTMLElement;
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private activeTab?: SlTab;
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private mutationObserver: MutationObserver;
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private resizeObserver: ResizeObserver;
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private tabs: SlTab[] = [];
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private panels: SlTabPanel[] = [];
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2021-03-24 14:21:21 +00:00
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@state() private hasScrollControls = false;
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/** The placement of the tabs. */
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@property() placement: 'top' | 'bottom' | 'start' | 'end' = 'top';
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/**
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* When set to auto, navigating tabs with the arrow keys will instantly show the corresponding tab panel. When set to
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* manual, the tab will receive focus but will not show until the user presses spacebar or enter.
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*/
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@property() activation: 'auto' | 'manual' = 'auto';
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/** Disables the scroll arrows that appear when tabs overflow. */
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@property({ attribute: 'no-scroll-controls', type: Boolean }) noScrollControls = false;
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2021-12-06 15:57:54 +00:00
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/** The locale to render the component in. */
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@property() lang: string;
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connectedCallback() {
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super.connectedCallback();
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this.resizeObserver = new ResizeObserver(() => {
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this.preventIndicatorTransition();
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this.repositionIndicator();
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this.updateScrollControls();
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});
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2020-08-03 11:40:02 +00:00
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2020-07-30 21:27:43 +00:00
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this.mutationObserver = new MutationObserver(mutations => {
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// Update aria labels when the DOM changes
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if (mutations.some(m => !['aria-labelledby', 'aria-controls'].includes(m.attributeName!))) {
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setTimeout(() => {
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this.setAriaLabels();
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});
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}
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// Sync tabs when disabled states change
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if (mutations.some(m => m.attributeName === 'disabled')) {
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this.syncTabsAndPanels();
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}
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});
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void this.updateComplete.then(() => {
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this.syncTabsAndPanels();
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this.mutationObserver.observe(this, { attributes: true, childList: true, subtree: true });
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this.resizeObserver.observe(this.nav);
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// Set initial tab state when the tabs first become visible
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const intersectionObserver = new IntersectionObserver((entries, observer) => {
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if (entries[0].intersectionRatio > 0) {
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this.setAriaLabels();
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this.setActiveTab(this.getActiveTab() ?? this.tabs[0], { emitEvents: false });
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observer.unobserve(entries[0].target);
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}
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});
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intersectionObserver.observe(this.tabGroup);
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});
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2020-07-15 21:30:37 +00:00
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}
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disconnectedCallback() {
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this.mutationObserver.disconnect();
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this.resizeObserver.unobserve(this.nav);
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}
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/** Shows the specified tab panel. */
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show(panel: string) {
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const tab = this.tabs.find(el => el.panel === panel);
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if (typeof tab !== 'undefined') {
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this.setActiveTab(tab, { scrollBehavior: 'smooth' });
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}
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}
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getAllTabs(includeDisabled = false) {
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const slot = this.shadowRoot!.querySelector<HTMLSlotElement>('slot[name="nav"]')!;
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return [...(slot.assignedElements() as SlTab[])].filter(el => {
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return includeDisabled
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? el.tagName.toLowerCase() === 'sl-tab'
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: el.tagName.toLowerCase() === 'sl-tab' && el.disabled;
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});
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}
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getAllPanels() {
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const slot = this.body.querySelector('slot')!;
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return [...slot.assignedElements()].filter(el => el.tagName.toLowerCase() === 'sl-tab-panel') as [SlTabPanel];
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}
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getActiveTab() {
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return this.tabs.find(el => el.active);
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}
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handleClick(event: MouseEvent) {
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const target = event.target as HTMLElement;
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const tab = target.closest('sl-tab');
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const tabGroup = tab?.closest('sl-tab-group');
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// Ensure the target tab is in this tab group
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if (tabGroup !== this) {
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return;
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}
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if (tab !== null) {
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this.setActiveTab(tab, { scrollBehavior: 'smooth' });
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}
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}
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handleKeyDown(event: KeyboardEvent) {
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const target = event.target as HTMLElement;
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const tab = target.closest('sl-tab');
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const tabGroup = tab?.closest('sl-tab-group');
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// Ensure the target tab is in this tab group
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if (tabGroup !== this) {
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return;
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}
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// Activate a tab
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if (['Enter', ' '].includes(event.key)) {
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if (tab !== null) {
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this.setActiveTab(tab, { scrollBehavior: 'smooth' });
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event.preventDefault();
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}
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}
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// Move focus left or right
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if (['ArrowLeft', 'ArrowRight', 'ArrowUp', 'ArrowDown', 'Home', 'End'].includes(event.key)) {
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const activeEl = document.activeElement;
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if (activeEl?.tagName.toLowerCase() === 'sl-tab') {
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let index = this.tabs.indexOf(activeEl as SlTab);
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if (event.key === 'Home') {
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index = 0;
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} else if (event.key === 'End') {
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index = this.tabs.length - 1;
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} else if (
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(['top', 'bottom'].includes(this.placement) && event.key === 'ArrowLeft') ||
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(['start', 'end'].includes(this.placement) && event.key === 'ArrowUp')
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) {
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index = Math.max(0, index - 1);
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} else if (
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(['top', 'bottom'].includes(this.placement) && event.key === 'ArrowRight') ||
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(['start', 'end'].includes(this.placement) && event.key === 'ArrowDown')
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) {
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index = Math.min(this.tabs.length - 1, index + 1);
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}
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2021-03-29 11:16:40 +00:00
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this.tabs[index].focus({ preventScroll: true });
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if (this.activation === 'auto') {
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this.setActiveTab(this.tabs[index], { scrollBehavior: 'smooth' });
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}
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if (['top', 'bottom'].includes(this.placement)) {
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scrollIntoView(this.tabs[index], this.nav, 'horizontal');
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}
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event.preventDefault();
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}
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}
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}
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handleScrollToStart() {
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this.nav.scroll({
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left: this.nav.scrollLeft - this.nav.clientWidth,
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behavior: 'smooth'
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});
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}
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handleScrollToEnd() {
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this.nav.scroll({
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left: this.nav.scrollLeft + this.nav.clientWidth,
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behavior: 'smooth'
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});
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}
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@watch('noScrollControls', { waitUntilFirstUpdate: true })
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updateScrollControls() {
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if (this.noScrollControls) {
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this.hasScrollControls = false;
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} else {
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this.hasScrollControls =
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['top', 'bottom'].includes(this.placement) && this.nav.scrollWidth > this.nav.clientWidth;
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}
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}
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setActiveTab(tab: SlTab | undefined, options?: { emitEvents?: boolean; scrollBehavior?: 'auto' | 'smooth' }) {
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options = {
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emitEvents: true,
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scrollBehavior: 'auto',
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...options
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};
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if (typeof tab !== 'undefined' && tab !== this.activeTab && !tab.disabled) {
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const previousTab = this.activeTab;
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this.activeTab = tab;
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// Sync active tab and panel
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this.tabs.forEach(el => {
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el.active = el === this.activeTab;
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});
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this.panels.forEach(el => {
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el.active = el.name === tab.panel;
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});
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this.syncIndicator();
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if (['top', 'bottom'].includes(this.placement)) {
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scrollIntoView(this.activeTab, this.nav, 'horizontal', options.scrollBehavior);
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}
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// Emit events
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if (options.emitEvents === true) {
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if (typeof previousTab !== 'undefined') {
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emit(this, 'sl-tab-hide', { detail: { name: previousTab.panel } });
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}
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emit(this, 'sl-tab-show', { detail: { name: this.activeTab.panel } });
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2020-07-15 21:30:37 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
setAriaLabels() {
|
|
|
|
// Link each tab with its corresponding panel
|
2022-01-16 05:47:14 +00:00
|
|
|
this.tabs.forEach(tab => {
|
|
|
|
const panel = this.panels.find(el => el.name === tab.panel);
|
|
|
|
if (typeof panel !== 'undefined') {
|
|
|
|
tab.setAttribute('aria-controls', panel.getAttribute('id')!);
|
|
|
|
panel.setAttribute('aria-labelledby', tab.getAttribute('id')!);
|
2020-07-15 21:30:37 +00:00
|
|
|
}
|
|
|
|
});
|
|
|
|
}
|
|
|
|
|
2022-01-16 05:47:14 +00:00
|
|
|
@watch('placement', { waitUntilFirstUpdate: true })
|
2021-03-11 14:20:54 +00:00
|
|
|
syncIndicator() {
|
2022-01-16 05:47:14 +00:00
|
|
|
const tab = this.getActiveTab();
|
|
|
|
|
|
|
|
if (typeof tab !== 'undefined') {
|
|
|
|
this.indicator.style.display = 'block';
|
|
|
|
this.repositionIndicator();
|
|
|
|
} else {
|
|
|
|
this.indicator.style.display = 'none';
|
2021-03-11 14:11:06 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-03-11 14:20:54 +00:00
|
|
|
repositionIndicator() {
|
2021-03-11 14:11:06 +00:00
|
|
|
const currentTab = this.getActiveTab();
|
|
|
|
|
2022-01-16 05:47:14 +00:00
|
|
|
if (typeof currentTab === 'undefined') {
|
2021-03-11 14:11:06 +00:00
|
|
|
return;
|
2020-07-15 21:30:37 +00:00
|
|
|
}
|
2021-03-11 14:11:06 +00:00
|
|
|
|
|
|
|
const width = currentTab.clientWidth;
|
|
|
|
const height = currentTab.clientHeight;
|
|
|
|
const offset = getOffset(currentTab, this.nav);
|
|
|
|
const offsetTop = offset.top + this.nav.scrollTop;
|
|
|
|
const offsetLeft = offset.left + this.nav.scrollLeft;
|
|
|
|
|
|
|
|
switch (this.placement) {
|
|
|
|
case 'top':
|
|
|
|
case 'bottom':
|
2021-03-11 14:20:54 +00:00
|
|
|
this.indicator.style.width = `${width}px`;
|
2021-03-22 21:26:56 +00:00
|
|
|
this.indicator.style.height = 'auto';
|
2021-03-11 14:20:54 +00:00
|
|
|
this.indicator.style.transform = `translateX(${offsetLeft}px)`;
|
2021-03-11 14:11:06 +00:00
|
|
|
break;
|
|
|
|
|
2021-05-26 11:32:51 +00:00
|
|
|
case 'start':
|
|
|
|
case 'end':
|
2021-03-22 21:26:56 +00:00
|
|
|
this.indicator.style.width = 'auto';
|
2021-03-11 14:20:54 +00:00
|
|
|
this.indicator.style.height = `${height}px`;
|
|
|
|
this.indicator.style.transform = `translateY(${offsetTop}px)`;
|
2021-03-11 14:11:06 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-03-11 14:20:54 +00:00
|
|
|
// In some orientations, when the component is resized, the indicator's position will change causing it to animate
|
|
|
|
// while you resize. Calling this method will prevent the transition from running on resize, which feels more natural.
|
|
|
|
preventIndicatorTransition() {
|
|
|
|
const transitionValue = this.indicator.style.transition;
|
|
|
|
this.indicator.style.transition = 'none';
|
2021-03-11 14:11:06 +00:00
|
|
|
|
|
|
|
requestAnimationFrame(() => {
|
2021-03-11 14:20:54 +00:00
|
|
|
this.indicator.style.transition = transitionValue;
|
2021-03-11 14:11:06 +00:00
|
|
|
});
|
2020-07-15 21:30:37 +00:00
|
|
|
}
|
|
|
|
|
2021-04-07 21:05:38 +00:00
|
|
|
// This stores tabs and panels so we can refer to a cache instead of calling querySelectorAll() multiple times.
|
2021-02-26 14:09:13 +00:00
|
|
|
syncTabsAndPanels() {
|
|
|
|
this.tabs = this.getAllTabs();
|
|
|
|
this.panels = this.getAllPanels();
|
2021-03-11 14:20:54 +00:00
|
|
|
this.syncIndicator();
|
2021-02-26 14:09:13 +00:00
|
|
|
}
|
|
|
|
|
2020-07-15 21:30:37 +00:00
|
|
|
render() {
|
2021-02-26 14:09:13 +00:00
|
|
|
return html`
|
2020-07-15 21:30:37 +00:00
|
|
|
<div
|
|
|
|
part="base"
|
2021-02-26 14:09:13 +00:00
|
|
|
class=${classMap({
|
2020-07-15 21:30:37 +00:00
|
|
|
'tab-group': true,
|
|
|
|
'tab-group--top': this.placement === 'top',
|
|
|
|
'tab-group--bottom': this.placement === 'bottom',
|
2021-05-26 11:32:51 +00:00
|
|
|
'tab-group--start': this.placement === 'start',
|
|
|
|
'tab-group--end': this.placement === 'end',
|
2020-10-22 18:00:06 +00:00
|
|
|
'tab-group--has-scroll-controls': this.hasScrollControls
|
2021-02-26 14:09:13 +00:00
|
|
|
})}
|
2021-03-06 17:01:39 +00:00
|
|
|
@click=${this.handleClick}
|
|
|
|
@keydown=${this.handleKeyDown}
|
2020-07-15 21:30:37 +00:00
|
|
|
>
|
2021-10-18 21:07:07 +00:00
|
|
|
<div class="tab-group__nav-container" part="nav">
|
2021-02-26 14:09:13 +00:00
|
|
|
${this.hasScrollControls
|
|
|
|
? html`
|
|
|
|
<sl-icon-button
|
2021-06-01 12:21:10 +00:00
|
|
|
class="tab-group__scroll-button tab-group__scroll-button--start"
|
2021-02-26 14:09:13 +00:00
|
|
|
exportparts="base:scroll-button"
|
|
|
|
name="chevron-left"
|
2021-04-20 13:37:19 +00:00
|
|
|
library="system"
|
2022-01-16 05:47:14 +00:00
|
|
|
label=${this.localize.term('scrollToStart')}
|
2021-06-01 12:21:10 +00:00
|
|
|
@click=${this.handleScrollToStart}
|
2021-03-06 17:01:39 +00:00
|
|
|
></sl-icon-button>
|
2021-02-26 14:09:13 +00:00
|
|
|
`
|
|
|
|
: ''}
|
|
|
|
|
2021-10-18 21:07:07 +00:00
|
|
|
<div class="tab-group__nav">
|
2021-02-26 14:09:13 +00:00
|
|
|
<div part="tabs" class="tab-group__tabs" role="tablist">
|
2021-03-11 14:20:54 +00:00
|
|
|
<div part="active-tab-indicator" class="tab-group__indicator"></div>
|
2021-03-06 17:01:39 +00:00
|
|
|
<slot name="nav" @slotchange=${this.syncTabsAndPanels}></slot>
|
2020-08-03 11:40:02 +00:00
|
|
|
</div>
|
2020-07-15 21:30:37 +00:00
|
|
|
</div>
|
2021-02-26 14:09:13 +00:00
|
|
|
|
|
|
|
${this.hasScrollControls
|
|
|
|
? html`
|
|
|
|
<sl-icon-button
|
2021-06-01 12:21:10 +00:00
|
|
|
class="tab-group__scroll-button tab-group__scroll-button--end"
|
2021-02-26 14:09:13 +00:00
|
|
|
exportparts="base:scroll-button"
|
|
|
|
name="chevron-right"
|
2021-04-20 13:37:19 +00:00
|
|
|
library="system"
|
2022-01-16 05:47:14 +00:00
|
|
|
label=${this.localize.term('scrollToEnd')}
|
2021-06-01 12:21:10 +00:00
|
|
|
@click=${this.handleScrollToEnd}
|
2021-03-06 17:01:39 +00:00
|
|
|
></sl-icon-button>
|
2021-02-26 14:09:13 +00:00
|
|
|
`
|
|
|
|
: ''}
|
2020-07-15 21:30:37 +00:00
|
|
|
</div>
|
|
|
|
|
2021-03-06 17:01:39 +00:00
|
|
|
<div part="body" class="tab-group__body">
|
|
|
|
<slot @slotchange=${this.syncTabsAndPanels}></slot>
|
2020-07-15 21:30:37 +00:00
|
|
|
</div>
|
|
|
|
</div>
|
2021-02-26 14:09:13 +00:00
|
|
|
`;
|
2020-07-15 21:30:37 +00:00
|
|
|
}
|
|
|
|
}
|
2021-03-12 14:07:38 +00:00
|
|
|
|
2021-03-12 14:09:08 +00:00
|
|
|
declare global {
|
|
|
|
interface HTMLElementTagNameMap {
|
|
|
|
'sl-tab-group': SlTabGroup;
|
|
|
|
}
|
|
|
|
}
|