import { c as classesToSelector } from '../shared/classes-to-selector.mjs';
import { c as createElement, g as elementIndex } from '../shared/utils.mjs';
function A11y(_ref) {
let {
swiper,
extendParams,
on
} = _ref;
extendParams({
a11y: {
enabled: true,
notificationClass: 'swiper-notification',
prevSlideMessage: 'Previous slide',
nextSlideMessage: 'Next slide',
firstSlideMessage: 'This is the first slide',
lastSlideMessage: 'This is the last slide',
paginationBulletMessage: 'Go to slide {{index}}',
slideLabelMessage: '{{index}} / {{slidesLength}}',
containerMessage: null,
containerRoleDescriptionMessage: null,
itemRoleDescriptionMessage: null,
slideRole: 'group',
id: null
}
});
swiper.a11y = {
clicked: false
};
let liveRegion = null;
function notify(message) {
const notification = liveRegion;
if (notification.length === 0) return;
notification.innerHTML = '';
notification.innerHTML = message;
}
const makeElementsArray = el => (Array.isArray(el) ? el : [el]).filter(e => !!e);
function getRandomNumber(size) {
if (size === void 0) {
size = 16;
}
const randomChar = () => Math.round(16 * Math.random()).toString(16);
return 'x'.repeat(size).replace(/x/g, randomChar);
}
function makeElFocusable(el) {
el = makeElementsArray(el);
el.forEach(subEl => {
subEl.setAttribute('tabIndex', '0');
});
}
function makeElNotFocusable(el) {
el = makeElementsArray(el);
el.forEach(subEl => {
subEl.setAttribute('tabIndex', '-1');
});
}
function addElRole(el, role) {
el = makeElementsArray(el);
el.forEach(subEl => {
subEl.setAttribute('role', role);
});
}
function addElRoleDescription(el, description) {
el = makeElementsArray(el);
el.forEach(subEl => {
subEl.setAttribute('aria-roledescription', description);
});
}
function addElControls(el, controls) {
el = makeElementsArray(el);
el.forEach(subEl => {
subEl.setAttribute('aria-controls', controls);
});
}
function addElLabel(el, label) {
el = makeElementsArray(el);
el.forEach(subEl => {
subEl.setAttribute('aria-label', label);
});
}
function addElId(el, id) {
el = makeElementsArray(el);
el.forEach(subEl => {
subEl.setAttribute('id', id);
});
}
function addElLive(el, live) {
el = makeElementsArray(el);
el.forEach(subEl => {
subEl.setAttribute('aria-live', live);
});
}
function disableEl(el) {
el = makeElementsArray(el);
el.forEach(subEl => {
subEl.setAttribute('aria-disabled', true);
});
}
function enableEl(el) {
el = makeElementsArray(el);
el.forEach(subEl => {
subEl.setAttribute('aria-disabled', false);
});
}
function onEnterOrSpaceKey(e) {
if (e.keyCode !== 13 && e.keyCode !== 32) return;
const params = swiper.params.a11y;
const targetEl = e.target;
if (swiper.pagination && swiper.pagination.el && (targetEl === swiper.pagination.el || swiper.pagination.el.contains(e.target))) {
if (!e.target.matches(classesToSelector(swiper.params.pagination.bulletClass))) return;
}
if (swiper.navigation && swiper.navigation.nextEl && targetEl === swiper.navigation.nextEl) {
if (!(swiper.isEnd && !swiper.params.loop)) {
swiper.slideNext();
}
if (swiper.isEnd) {
notify(params.lastSlideMessage);
} else {
notify(params.nextSlideMessage);
}
}
if (swiper.navigation && swiper.navigation.prevEl && targetEl === swiper.navigation.prevEl) {
if (!(swiper.isBeginning && !swiper.params.loop)) {
swiper.slidePrev();
}
if (swiper.isBeginning) {
notify(params.firstSlideMessage);
} else {
notify(params.prevSlideMessage);
}
}
if (swiper.pagination && targetEl.matches(classesToSelector(swiper.params.pagination.bulletClass))) {
targetEl.click();
}
}
function updateNavigation() {
if (swiper.params.loop || swiper.params.rewind || !swiper.navigation) return;
const {
nextEl,
prevEl
} = swiper.navigation;
if (prevEl) {
if (swiper.isBeginning) {
disableEl(prevEl);
makeElNotFocusable(prevEl);
} else {
enableEl(prevEl);
makeElFocusable(prevEl);
}
}
if (nextEl) {
if (swiper.isEnd) {
disableEl(nextEl);
makeElNotFocusable(nextEl);
} else {
enableEl(nextEl);
makeElFocusable(nextEl);
}
}
}
function hasPagination() {
return swiper.pagination && swiper.pagination.bullets && swiper.pagination.bullets.length;
}
function hasClickablePagination() {
return hasPagination() && swiper.params.pagination.clickable;
}
function updatePagination() {
const params = swiper.params.a11y;
if (!hasPagination()) return;
swiper.pagination.bullets.forEach(bulletEl => {
if (swiper.params.pagination.clickable) {
makeElFocusable(bulletEl);
if (!swiper.params.pagination.renderBullet) {
addElRole(bulletEl, 'button');
addElLabel(bulletEl, params.paginationBulletMessage.replace(/\{\{index\}\}/, elementIndex(bulletEl) + 1));
}
}
if (bulletEl.matches(classesToSelector(swiper.params.pagination.bulletActiveClass))) {
bulletEl.setAttribute('aria-current', 'true');
} else {
bulletEl.removeAttribute('aria-current');
}
});
}
const initNavEl = (el, wrapperId, message) => {
makeElFocusable(el);
if (el.tagName !== 'BUTTON') {
addElRole(el, 'button');
el.addEventListener('keydown', onEnterOrSpaceKey);
}
addElLabel(el, message);
addElControls(el, wrapperId);
};
const handlePointerDown = () => {
swiper.a11y.clicked = true;
};
const handlePointerUp = () => {
requestAnimationFrame(() => {
requestAnimationFrame(() => {
if (!swiper.destroyed) {
swiper.a11y.clicked = false;
}
});
});
};
const handleFocus = e => {
if (swiper.a11y.clicked) return;
const slideEl = e.target.closest(`.${swiper.params.slideClass}, swiper-slide`);
if (!slideEl || !swiper.slides.includes(slideEl)) return;
const isActive = swiper.slides.indexOf(slideEl) === swiper.activeIndex;
const isVisible = swiper.params.watchSlidesProgress && swiper.visibleSlides && swiper.visibleSlides.includes(slideEl);
if (isActive || isVisible) return;
if (e.sourceCapabilities && e.sourceCapabilities.firesTouchEvents) return;
if (swiper.isHorizontal()) {
swiper.el.scrollLeft = 0;
} else {
swiper.el.scrollTop = 0;
}
swiper.slideTo(swiper.slides.indexOf(slideEl), 0);
};
const initSlides = () => {
const params = swiper.params.a11y;
if (params.itemRoleDescriptionMessage) {
addElRoleDescription(swiper.slides, params.itemRoleDescriptionMessage);
}
if (params.slideRole) {
addElRole(swiper.slides, params.slideRole);
}
const slidesLength = swiper.slides.length;
if (params.slideLabelMessage) {
swiper.slides.forEach((slideEl, index) => {
const slideIndex = swiper.params.loop ? parseInt(slideEl.getAttribute('data-swiper-slide-index'), 10) : index;
const ariaLabelMessage = params.slideLabelMessage.replace(/\{\{index\}\}/, slideIndex + 1).replace(/\{\{slidesLength\}\}/, slidesLength);
addElLabel(slideEl, ariaLabelMessage);
});
}
};
const init = () => {
const params = swiper.params.a11y;
swiper.el.append(liveRegion);
// Container
const containerEl = swiper.el;
if (params.containerRoleDescriptionMessage) {
addElRoleDescription(containerEl, params.containerRoleDescriptionMessage);
}
if (params.containerMessage) {
addElLabel(containerEl, params.containerMessage);
}
// Wrapper
const wrapperEl = swiper.wrapperEl;
const wrapperId = params.id || wrapperEl.getAttribute('id') || `swiper-wrapper-${getRandomNumber(16)}`;
const live = swiper.params.autoplay && swiper.params.autoplay.enabled ? 'off' : 'polite';
addElId(wrapperEl, wrapperId);
addElLive(wrapperEl, live);
// Slide
initSlides();
// Navigation
let {
nextEl,
prevEl
} = swiper.navigation ? swiper.navigation : {};
nextEl = makeElementsArray(nextEl);
prevEl = makeElementsArray(prevEl);
if (nextEl) {
nextEl.forEach(el => initNavEl(el, wrapperId, params.nextSlideMessage));
}
if (prevEl) {
prevEl.forEach(el => initNavEl(el, wrapperId, params.prevSlideMessage));
}
// Pagination
if (hasClickablePagination()) {
const paginationEl = makeElementsArray(swiper.pagination.el);
paginationEl.forEach(el => {
el.addEventListener('keydown', onEnterOrSpaceKey);
});
}
// Tab focus
swiper.el.addEventListener('focus', handleFocus, true);
swiper.el.addEventListener('pointerdown', handlePointerDown, true);
swiper.el.addEventListener('pointerup', handlePointerUp, true);
};
function destroy() {
if (liveRegion) liveRegion.remove();
let {
nextEl,
prevEl
} = swiper.navigation ? swiper.navigation : {};
nextEl = makeElementsArray(nextEl);
prevEl = makeElementsArray(prevEl);
if (nextEl) {
nextEl.forEach(el => el.removeEventListener('keydown', onEnterOrSpaceKey));
}
if (prevEl) {
prevEl.forEach(el => el.removeEventListener('keydown', onEnterOrSpaceKey));
}
// Pagination
if (hasClickablePagination()) {
const paginationEl = makeElementsArray(swiper.pagination.el);
paginationEl.forEach(el => {
el.removeEventListener('keydown', onEnterOrSpaceKey);
});
}
// Tab focus
swiper.el.removeEventListener('focus', handleFocus, true);
swiper.el.removeEventListener('pointerdown', handlePointerDown, true);
swiper.el.removeEventListener('pointerup', handlePointerUp, true);
}
on('beforeInit', () => {
liveRegion = createElement('span', swiper.params.a11y.notificationClass);
liveRegion.setAttribute('aria-live', 'assertive');
liveRegion.setAttribute('aria-atomic', 'true');
});
on('afterInit', () => {
if (!swiper.params.a11y.enabled) return;
init();
});
on('slidesLengthChange snapGridLengthChange slidesGridLengthChange', () => {
if (!swiper.params.a11y.enabled) return;
initSlides();
});
on('fromEdge toEdge afterInit lock unlock', () => {
if (!swiper.params.a11y.enabled) return;
updateNavigation();
});
on('paginationUpdate', () => {
if (!swiper.params.a11y.enabled) return;
updatePagination();
});
on('destroy', () => {
if (!swiper.params.a11y.enabled) return;
destroy();
});
}
export { A11y as default };
