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uni_modules/zebra-swiper/libs/slide/slidePrev.js

@@ -0,0 +1,63 @@
+export default function slidePrev(speed = this.params.speed, runCallbacks = true, internal) {
+	const swiper = this;
+	const {
+		params,
+		animating,
+		snapGrid,
+		slidesGrid,
+		rtlTranslate,
+		enabled
+	} = swiper;
+	if (!enabled) return swiper;
+
+	if (params.loop) {
+		if (animating && params.loopPreventsSlide) return false;
+		swiper.loopFix();
+
+	}
+
+	const translate = rtlTranslate ? swiper.translate : -swiper.translate;
+
+	function normalize(val) {
+		if (val < 0) return -Math.floor(Math.abs(val));
+		return Math.floor(val);
+	}
+
+	const normalizedTranslate = normalize(translate);
+	const normalizedSnapGrid = snapGrid.map(val => normalize(val));
+	let prevSnap = snapGrid[normalizedSnapGrid.indexOf(normalizedTranslate) - 1];
+
+	if (typeof prevSnap === 'undefined' && params.cssMode) {
+		let prevSnapIndex;
+		snapGrid.forEach((snap, snapIndex) => {
+			if (normalizedTranslate >= snap) {
+				prevSnapIndex = snapIndex;
+			}
+		});
+
+		if (typeof prevSnapIndex !== 'undefined') {
+			prevSnap = snapGrid[prevSnapIndex > 0 ? prevSnapIndex - 1 : prevSnapIndex];
+		}
+	}
+
+	let prevIndex = 0;
+
+	if (typeof prevSnap !== 'undefined') {
+		prevIndex = slidesGrid.indexOf(prevSnap);
+		if (prevIndex < 0) prevIndex = swiper.activeIndex - 1;
+
+		if (params.slidesPerView === 'auto' && params.slidesPerGroup === 1 && params.slidesPerGroupAuto) {
+			prevIndex = prevIndex - swiper.slidesPerViewDynamic('previous', true) + 1;
+			prevIndex = Math.max(prevIndex, 0);
+		}
+	}
+
+	if (params.rewind && swiper.isBeginning) {
+		return swiper.slideTo(swiper.slides.length - 1, speed, runCallbacks, internal);
+	}
+
+	setTimeout(() => {
+		swiper.slideTo(prevIndex, speed, runCallbacks, internal)
+	}, 30)
+	return true;
+}