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uni_modules/zebra-swiper/libs/update/updateActiveIndex.js

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+export default function updateActiveIndex(newActiveIndex) {
+	const swiper = this;
+	const translate = swiper.rtlTranslate ? swiper.translate : -swiper.translate;
+	const {
+		slidesGrid,
+		snapGrid,
+		params,
+		activeIndex: previousIndex,
+		realIndex: previousRealIndex,
+		snapIndex: previousSnapIndex
+	} = swiper;
+	let activeIndex = newActiveIndex;
+	let snapIndex;
+
+	if (typeof activeIndex === 'undefined') {
+		for (let i = 0; i < slidesGrid.length; i += 1) {
+			if (typeof slidesGrid[i + 1] !== 'undefined') {
+				if (translate >= slidesGrid[i] && translate < slidesGrid[i + 1] - (slidesGrid[i + 1] - slidesGrid[i]) /
+					2) {
+					activeIndex = i;
+				} else if (translate >= slidesGrid[i] && translate < slidesGrid[i + 1]) {
+					activeIndex = i + 1;
+				}
+			} else if (translate >= slidesGrid[i]) {
+				activeIndex = i;
+			}
+		} // Normalize slideIndex
+
+
+		if (params.normalizeSlideIndex) {
+			if (activeIndex < 0 || typeof activeIndex === 'undefined') activeIndex = 0;
+		}
+
+	}
+
+	if (snapGrid.indexOf(translate) >= 0) {
+		snapIndex = snapGrid.indexOf(translate);
+	} else {
+		const skip = Math.min(params.slidesPerGroupSkip, activeIndex);
+		snapIndex = skip + Math.floor((activeIndex - skip) / params.slidesPerGroup);
+	}
+
+	if (snapIndex >= snapGrid.length) snapIndex = snapGrid.length - 1;
+
+
+
+	if (swiper.loopedSlides) {
+		swiper.slides.filter((item) => item.index >= swiper.loopedSlides && item.index < swiper.slides.length - swiper
+			.loopedSlides).forEach((item, index) => {
+			item.dataSwiperSlideIndex = item.index - swiper.loopedSlides;
+		})
+		swiper.slides.filter((item) => item.index < swiper.loopedSlides).forEach((item, index) => {
+			if (swiper.slides[swiper.slides.length - swiper.loopedSlides * 3 + index]) {
+				item.dataSwiperSlideIndex = swiper.slides[swiper.slides.length - swiper.loopedSlides * 3 +
+						index]
+					.index;
+			}
+		})
+		swiper.slides.filter((item) => item.index >= swiper.slides.length - swiper
+			.loopedSlides).forEach((item, index) => {
+			item.dataSwiperSlideIndex = swiper.slides[index].index;
+		})
+	}
+
+
+	if (activeIndex === previousIndex) {
+		if (snapIndex !== previousSnapIndex) {
+			swiper.snapIndex = snapIndex;
+			swiper.emit('snapIndexChange');
+		}
+
+		return;
+	} // Get real index
+
+	let realIndex;
+	if (swiper.virtual && params.virtual.enabled) {
+		realIndex = activeIndex;
+	} else {
+		if (swiper.slides[activeIndex].dataSwiperSlideIndex == undefined || swiper.slides[activeIndex]
+			.dataSwiperSlideIndex == null) {
+			realIndex = activeIndex;
+		} else {
+			realIndex = swiper.slides[activeIndex].dataSwiperSlideIndex;
+		}
+	}
+	Object.assign(swiper, {
+		snapIndex,
+		realIndex,
+		previousIndex,
+		activeIndex
+	});
+	swiper.emit('activeIndexChange');
+	swiper.emit('snapIndexChange');
+
+	if (previousRealIndex !== realIndex) {
+		swiper.emit('realIndexChange');
+	}
+
+	if (swiper.initialized || swiper.params.runCallbacksOnInit) {
+		swiper.emit('slideChange', activeIndex);
+	}
+}