server/aspnetapp/wwwroot/lib/swiper/src/components/thumbs/thumbs.js

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import Utils from '../../utils/utils';
import $ from '../../utils/dom';

const Thumbs = {
  init() {
    const swiper = this;
    const { thumbs: thumbsParams } = swiper.params;
    const SwiperClass = swiper.constructor;
    if (thumbsParams.swiper instanceof SwiperClass) {
      swiper.thumbs.swiper = thumbsParams.swiper;
      Utils.extend(swiper.thumbs.swiper.originalParams, {
        watchSlidesProgress: true,
        slideToClickedSlide: false,
      });
      Utils.extend(swiper.thumbs.swiper.params, {
        watchSlidesProgress: true,
        slideToClickedSlide: false,
      });
    } else if (Utils.isObject(thumbsParams.swiper)) {
      swiper.thumbs.swiper = new SwiperClass(Utils.extend({}, thumbsParams.swiper, {
        watchSlidesVisibility: true,
        watchSlidesProgress: true,
        slideToClickedSlide: false,
      }));
      swiper.thumbs.swiperCreated = true;
    }
    swiper.thumbs.swiper.$el.addClass(swiper.params.thumbs.thumbsContainerClass);
    swiper.thumbs.swiper.on('tap', swiper.thumbs.onThumbClick);
  },
  onThumbClick() {
    const swiper = this;
    const thumbsSwiper = swiper.thumbs.swiper;
    if (!thumbsSwiper) return;
    const clickedIndex = thumbsSwiper.clickedIndex;
    const clickedSlide = thumbsSwiper.clickedSlide;
    if (clickedSlide && $(clickedSlide).hasClass(swiper.params.thumbs.slideThumbActiveClass)) return;
    if (typeof clickedIndex === 'undefined' || clickedIndex === null) return;
    let slideToIndex;
    if (thumbsSwiper.params.loop) {
      slideToIndex = parseInt($(thumbsSwiper.clickedSlide).attr('data-swiper-slide-index'), 10);
    } else {
      slideToIndex = clickedIndex;
    }
    if (swiper.params.loop) {
      let currentIndex = swiper.activeIndex;
      if (swiper.slides.eq(currentIndex).hasClass(swiper.params.slideDuplicateClass)) {
        swiper.loopFix();
        // eslint-disable-next-line
        swiper._clientLeft = swiper.$wrapperEl[0].clientLeft;
        currentIndex = swiper.activeIndex;
      }
      const prevIndex = swiper.slides.eq(currentIndex).prevAll(`[data-swiper-slide-index="${slideToIndex}"]`).eq(0).index();
      const nextIndex = swiper.slides.eq(currentIndex).nextAll(`[data-swiper-slide-index="${slideToIndex}"]`).eq(0).index();
      if (typeof prevIndex === 'undefined') slideToIndex = nextIndex;
      else if (typeof nextIndex === 'undefined') slideToIndex = prevIndex;
      else if (nextIndex - currentIndex < currentIndex - prevIndex) slideToIndex = nextIndex;
      else slideToIndex = prevIndex;
    }
    swiper.slideTo(slideToIndex);
  },
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