| 1 | export default function updateActiveIndex(newActiveIndex) {
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| 2 | const swiper = this;
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| 3 | const translate = swiper.rtlTranslate ? swiper.translate : -swiper.translate;
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| 4 | const {
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| 5 | slidesGrid,
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| 6 | snapGrid,
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| 7 | params,
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| 8 | activeIndex: previousIndex,
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| 9 | realIndex: previousRealIndex,
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| 10 | snapIndex: previousSnapIndex
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| 11 | } = swiper;
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| 12 | let activeIndex = newActiveIndex;
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| 13 | let snapIndex;
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| 14 |
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| 15 | if (typeof activeIndex === 'undefined') {
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| 16 | for (let i = 0; i < slidesGrid.length; i += 1) {
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| 17 | if (typeof slidesGrid[i + 1] !== 'undefined') {
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| 18 | if (translate >= slidesGrid[i] && translate < slidesGrid[i + 1] - (slidesGrid[i + 1] - slidesGrid[i]) / 2) {
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| 19 | activeIndex = i;
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| 20 | } else if (translate >= slidesGrid[i] && translate < slidesGrid[i + 1]) {
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| 21 | activeIndex = i + 1;
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| 22 | }
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| 23 | } else if (translate >= slidesGrid[i]) {
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| 24 | activeIndex = i;
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| 25 | }
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| 26 | }
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| 27 |
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| 28 |
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| 29 | if (params.normalizeSlideIndex) {
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| 30 | if (activeIndex < 0 || typeof activeIndex === 'undefined') activeIndex = 0;
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| 31 | }
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| 32 | }
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| 33 |
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| 34 | if (snapGrid.indexOf(translate) >= 0) {
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| 35 | snapIndex = snapGrid.indexOf(translate);
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| 36 | } else {
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| 37 | const skip = Math.min(params.slidesPerGroupSkip, activeIndex);
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| 38 | snapIndex = skip + Math.floor((activeIndex - skip) / params.slidesPerGroup);
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| 39 | }
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| 40 |
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| 41 | if (snapIndex >= snapGrid.length) snapIndex = snapGrid.length - 1;
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| 42 |
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| 43 | if (activeIndex === previousIndex) {
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| 44 | if (snapIndex !== previousSnapIndex) {
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| 45 | swiper.snapIndex = snapIndex;
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| 46 | swiper.emit('snapIndexChange');
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| 47 | }
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| 48 |
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| 49 | return;
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| 50 | }
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| 51 |
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| 52 |
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| 53 | const realIndex = parseInt(swiper.slides.eq(activeIndex).attr('data-swiper-slide-index') || activeIndex, 10);
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| 54 | Object.assign(swiper, {
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| 55 | snapIndex,
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| 56 | realIndex,
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| 57 | previousIndex,
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| 58 | activeIndex
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| 59 | });
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| 60 | swiper.emit('activeIndexChange');
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| 61 | swiper.emit('snapIndexChange');
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| 62 |
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| 63 | if (previousRealIndex !== realIndex) {
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| 64 | swiper.emit('realIndexChange');
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| 65 | }
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| 66 |
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| 67 | if (swiper.initialized || swiper.params.runCallbacksOnInit) {
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| 68 | swiper.emit('slideChange');
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| 69 | }
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| 70 | } |
| \ | No newline at end of file |