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uni_modules/zebra-swiper/libs/vue2/loop.js

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+import Swiper from '../../index.js';
+
+function calcLoopedSlides(slides, swiperParams) {
+	let slidesPerViewParams = swiperParams.slidesPerView;
+	if (swiperParams.breakpoints) {
+		const breakpoint = Swiper.prototype.getBreakpoint(swiperParams.breakpoints);
+		const breakpointOnlyParams =
+			breakpoint in swiperParams.breakpoints ? swiperParams.breakpoints[breakpoint] : undefined;
+		if (breakpointOnlyParams && breakpointOnlyParams.slidesPerView) {
+			slidesPerViewParams = breakpointOnlyParams.slidesPerView;
+		}
+	}
+	let loopedSlides = Math.ceil(parseFloat(swiperParams.loopedSlides || slidesPerViewParams, 10));
+
+	loopedSlides += swiperParams.loopAdditionalSlides;
+
+	if (loopedSlides > slides.length) {
+		loopedSlides = slides.length;
+	}
+	return loopedSlides;
+}
+
+function renderLoop(native, swiperParams, data) {
+	const modifiedValue = data;
+	if (swiperParams.loopFillGroupWithBlank) {
+		const blankSlidesNum =
+			swiperParams.slidesPerGroup - (modifiedValue.length % swiperParams.slidesPerGroup);
+		if (blankSlidesNum !== swiperParams.slidesPerGroup) {
+			for (let i = 0; i < blankSlidesNum; i += 1) {
+				const blankSlide = h('div', {
+					class: `${swiperParams.slideClass} ${swiperParams.slideBlankClass}`,
+				});
+				modifiedValue.push(blankSlide);
+			}
+		}
+	}
+
+	if (swiperParams.slidesPerView === 'auto' && !swiperParams.loopedSlides) {
+		swiperParams.loopedSlides = modifiedValue.length;
+	}
+
+	const loopedSlides = calcLoopedSlides(modifiedValue, swiperParams);
+
+	const prependSlides = [];
+	const appendSlides = [];
+	const prependValue = [];
+	const appendValue = [];
+	modifiedValue.forEach((child, index) => {
+		if (index < loopedSlides) {
+			if (!native.loopUpdateData) {
+				appendValue.push(child);
+			}
+		}
+		if (index < modifiedValue.length && index >= modifiedValue.length - loopedSlides) {
+			if (!native.loopUpdateData) {
+				prependValue.push(child);
+			}
+		}
+	})
+	if (native) {
+		if (!native.originalDataList) native.originalDataList = [];
+		native.originalDataList = [...prependValue, ...modifiedValue, ...appendValue];
+	}
+
+	return {
+		data: [...prependValue, ...modifiedValue, ...appendValue]
+	};
+}
+
+export {
+	calcLoopedSlides,
+	renderLoop
+};