348 lines
9.9 KiB
JavaScript
348 lines
9.9 KiB
JavaScript
import { getDocument } from 'ssr-window';
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import { createElement, elementOffset, nextTick } from '../../shared/utils.js';
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import createElementIfNotDefined from '../../shared/create-element-if-not-defined.js';
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export default function Scrollbar({
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swiper,
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extendParams,
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on,
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emit
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}) {
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const document = getDocument();
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let isTouched = false;
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let timeout = null;
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let dragTimeout = null;
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let dragStartPos;
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let dragSize;
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let trackSize;
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let divider;
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extendParams({
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scrollbar: {
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el: null,
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dragSize: 'auto',
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hide: false,
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draggable: false,
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snapOnRelease: true,
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lockClass: 'swiper-scrollbar-lock',
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dragClass: 'swiper-scrollbar-drag',
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scrollbarDisabledClass: 'swiper-scrollbar-disabled',
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horizontalClass: `swiper-scrollbar-horizontal`,
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verticalClass: `swiper-scrollbar-vertical`
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}
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});
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swiper.scrollbar = {
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el: null,
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dragEl: null
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};
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function setTranslate() {
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if (!swiper.params.scrollbar.el || !swiper.scrollbar.el) return;
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const {
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scrollbar,
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rtlTranslate: rtl
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} = swiper;
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const {
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dragEl,
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el
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} = scrollbar;
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const params = swiper.params.scrollbar;
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const progress = swiper.params.loop ? swiper.progressLoop : swiper.progress;
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let newSize = dragSize;
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let newPos = (trackSize - dragSize) * progress;
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if (rtl) {
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newPos = -newPos;
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if (newPos > 0) {
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newSize = dragSize - newPos;
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newPos = 0;
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} else if (-newPos + dragSize > trackSize) {
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newSize = trackSize + newPos;
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}
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} else if (newPos < 0) {
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newSize = dragSize + newPos;
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newPos = 0;
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} else if (newPos + dragSize > trackSize) {
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newSize = trackSize - newPos;
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}
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if (swiper.isHorizontal()) {
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dragEl.style.transform = `translate3d(${newPos}px, 0, 0)`;
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dragEl.style.width = `${newSize}px`;
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} else {
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dragEl.style.transform = `translate3d(0px, ${newPos}px, 0)`;
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dragEl.style.height = `${newSize}px`;
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}
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if (params.hide) {
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clearTimeout(timeout);
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el.style.opacity = 1;
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timeout = setTimeout(() => {
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el.style.opacity = 0;
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el.style.transitionDuration = '400ms';
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}, 1000);
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}
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}
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function setTransition(duration) {
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if (!swiper.params.scrollbar.el || !swiper.scrollbar.el) return;
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swiper.scrollbar.dragEl.style.transitionDuration = `${duration}ms`;
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}
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function updateSize() {
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if (!swiper.params.scrollbar.el || !swiper.scrollbar.el) return;
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const {
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scrollbar
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} = swiper;
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const {
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dragEl,
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el
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} = scrollbar;
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dragEl.style.width = '';
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dragEl.style.height = '';
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trackSize = swiper.isHorizontal() ? el.offsetWidth : el.offsetHeight;
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divider = swiper.size / (swiper.virtualSize + swiper.params.slidesOffsetBefore - (swiper.params.centeredSlides ? swiper.snapGrid[0] : 0));
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if (swiper.params.scrollbar.dragSize === 'auto') {
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dragSize = trackSize * divider;
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} else {
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dragSize = parseInt(swiper.params.scrollbar.dragSize, 10);
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}
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if (swiper.isHorizontal()) {
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dragEl.style.width = `${dragSize}px`;
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} else {
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dragEl.style.height = `${dragSize}px`;
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}
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if (divider >= 1) {
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el.style.display = 'none';
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} else {
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el.style.display = '';
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}
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if (swiper.params.scrollbar.hide) {
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el.style.opacity = 0;
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}
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if (swiper.params.watchOverflow && swiper.enabled) {
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scrollbar.el.classList[swiper.isLocked ? 'add' : 'remove'](swiper.params.scrollbar.lockClass);
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}
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}
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function getPointerPosition(e) {
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return swiper.isHorizontal() ? e.clientX : e.clientY;
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}
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function setDragPosition(e) {
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const {
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scrollbar,
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rtlTranslate: rtl
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} = swiper;
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const {
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el
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} = scrollbar;
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let positionRatio;
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positionRatio = (getPointerPosition(e) - elementOffset(el)[swiper.isHorizontal() ? 'left' : 'top'] - (dragStartPos !== null ? dragStartPos : dragSize / 2)) / (trackSize - dragSize);
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positionRatio = Math.max(Math.min(positionRatio, 1), 0);
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if (rtl) {
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positionRatio = 1 - positionRatio;
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}
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const position = swiper.minTranslate() + (swiper.maxTranslate() - swiper.minTranslate()) * positionRatio;
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swiper.updateProgress(position);
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swiper.setTranslate(position);
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swiper.updateActiveIndex();
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swiper.updateSlidesClasses();
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}
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function onDragStart(e) {
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const params = swiper.params.scrollbar;
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const {
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scrollbar,
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wrapperEl
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} = swiper;
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const {
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el,
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dragEl
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} = scrollbar;
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isTouched = true;
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dragStartPos = e.target === dragEl ? getPointerPosition(e) - e.target.getBoundingClientRect()[swiper.isHorizontal() ? 'left' : 'top'] : null;
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e.preventDefault();
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e.stopPropagation();
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wrapperEl.style.transitionDuration = '100ms';
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dragEl.style.transitionDuration = '100ms';
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setDragPosition(e);
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clearTimeout(dragTimeout);
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el.style.transitionDuration = '0ms';
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if (params.hide) {
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el.style.opacity = 1;
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}
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if (swiper.params.cssMode) {
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swiper.wrapperEl.style['scroll-snap-type'] = 'none';
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}
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emit('scrollbarDragStart', e);
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}
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function onDragMove(e) {
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const {
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scrollbar,
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wrapperEl
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} = swiper;
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const {
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el,
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dragEl
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} = scrollbar;
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if (!isTouched) return;
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if (e.preventDefault) e.preventDefault();else e.returnValue = false;
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setDragPosition(e);
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wrapperEl.style.transitionDuration = '0ms';
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el.style.transitionDuration = '0ms';
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dragEl.style.transitionDuration = '0ms';
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emit('scrollbarDragMove', e);
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}
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function onDragEnd(e) {
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const params = swiper.params.scrollbar;
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const {
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scrollbar,
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wrapperEl
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} = swiper;
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const {
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el
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} = scrollbar;
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if (!isTouched) return;
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isTouched = false;
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if (swiper.params.cssMode) {
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swiper.wrapperEl.style['scroll-snap-type'] = '';
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wrapperEl.style.transitionDuration = '';
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}
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if (params.hide) {
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clearTimeout(dragTimeout);
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dragTimeout = nextTick(() => {
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el.style.opacity = 0;
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el.style.transitionDuration = '400ms';
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}, 1000);
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}
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emit('scrollbarDragEnd', e);
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if (params.snapOnRelease) {
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swiper.slideToClosest();
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}
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}
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function events(method) {
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const {
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scrollbar,
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params
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} = swiper;
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const el = scrollbar.el;
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if (!el) return;
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const target = el;
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const activeListener = params.passiveListeners ? {
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passive: false,
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capture: false
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} : false;
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const passiveListener = params.passiveListeners ? {
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passive: true,
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capture: false
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} : false;
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if (!target) return;
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const eventMethod = method === 'on' ? 'addEventListener' : 'removeEventListener';
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target[eventMethod]('pointerdown', onDragStart, activeListener);
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document[eventMethod]('pointermove', onDragMove, activeListener);
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document[eventMethod]('pointerup', onDragEnd, passiveListener);
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}
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function enableDraggable() {
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if (!swiper.params.scrollbar.el || !swiper.scrollbar.el) return;
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events('on');
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}
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function disableDraggable() {
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if (!swiper.params.scrollbar.el || !swiper.scrollbar.el) return;
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events('off');
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}
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function init() {
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const {
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scrollbar,
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el: swiperEl
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} = swiper;
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swiper.params.scrollbar = createElementIfNotDefined(swiper, swiper.originalParams.scrollbar, swiper.params.scrollbar, {
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el: 'swiper-scrollbar'
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});
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const params = swiper.params.scrollbar;
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if (!params.el) return;
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let el;
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if (typeof params.el === 'string' && swiper.isElement) {
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el = swiper.el.shadowRoot.querySelector(params.el);
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}
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if (!el && typeof params.el === 'string') {
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el = document.querySelectorAll(params.el);
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} else if (!el) {
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el = params.el;
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}
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if (swiper.params.uniqueNavElements && typeof params.el === 'string' && el.length > 1 && swiperEl.querySelectorAll(params.el).length === 1) {
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el = swiperEl.querySelector(params.el);
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}
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if (el.length > 0) el = el[0];
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el.classList.add(swiper.isHorizontal() ? params.horizontalClass : params.verticalClass);
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let dragEl;
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if (el) {
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dragEl = el.querySelector(`.${swiper.params.scrollbar.dragClass}`);
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if (!dragEl) {
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dragEl = createElement('div', swiper.params.scrollbar.dragClass);
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el.append(dragEl);
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}
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}
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Object.assign(scrollbar, {
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el,
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dragEl
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});
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if (params.draggable) {
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enableDraggable();
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}
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if (el) {
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el.classList[swiper.enabled ? 'remove' : 'add'](swiper.params.scrollbar.lockClass);
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}
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}
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function destroy() {
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const params = swiper.params.scrollbar;
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const el = swiper.scrollbar.el;
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if (el) {
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el.classList.remove(swiper.isHorizontal() ? params.horizontalClass : params.verticalClass);
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}
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disableDraggable();
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}
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on('init', () => {
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if (swiper.params.scrollbar.enabled === false) {
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// eslint-disable-next-line
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disable();
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} else {
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init();
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updateSize();
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setTranslate();
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}
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});
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on('update resize observerUpdate lock unlock', () => {
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updateSize();
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});
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on('setTranslate', () => {
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setTranslate();
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});
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on('setTransition', (_s, duration) => {
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setTransition(duration);
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});
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on('enable disable', () => {
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const {
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el
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} = swiper.scrollbar;
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if (el) {
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el.classList[swiper.enabled ? 'remove' : 'add'](swiper.params.scrollbar.lockClass);
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}
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});
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on('destroy', () => {
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destroy();
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});
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const enable = () => {
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swiper.el.classList.remove(swiper.params.scrollbar.scrollbarDisabledClass);
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if (swiper.scrollbar.el) {
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swiper.scrollbar.el.classList.remove(swiper.params.scrollbar.scrollbarDisabledClass);
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}
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init();
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updateSize();
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setTranslate();
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};
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const disable = () => {
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swiper.el.classList.add(swiper.params.scrollbar.scrollbarDisabledClass);
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if (swiper.scrollbar.el) {
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swiper.scrollbar.el.classList.add(swiper.params.scrollbar.scrollbarDisabledClass);
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}
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destroy();
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};
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Object.assign(swiper.scrollbar, {
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enable,
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disable,
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updateSize,
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setTranslate,
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init,
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destroy
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});
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} |