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Mini Shell
Mini Shell
import { now } from '../../shared/utils.js';
export default function freeMode(_ref) {
let {
swiper,
extendParams,
emit,
once
} = _ref;
extendParams({
freeMode: {
enabled: false,
momentum: true,
momentumRatio: 1,
momentumBounce: true,
momentumBounceRatio: 1,
momentumVelocityRatio: 1,
sticky: false,
minimumVelocity: 0.02
}
});
function onTouchStart() {
const translate = swiper.getTranslate();
swiper.setTranslate(translate);
swiper.setTransition(0);
swiper.touchEventsData.velocities.length = 0;
swiper.freeMode.onTouchEnd({
currentPos: swiper.rtl ? swiper.translate : -swiper.translate
});
}
function onTouchMove() {
const {
touchEventsData: data,
touches
} = swiper; // Velocity
if (data.velocities.length === 0) {
data.velocities.push({
position: touches[swiper.isHorizontal() ? 'startX' : 'startY'],
time: data.touchStartTime
});
}
data.velocities.push({
position: touches[swiper.isHorizontal() ? 'currentX' : 'currentY'],
time: now()
});
}
function onTouchEnd(_ref2) {
let {
currentPos
} = _ref2;
const {
params,
$wrapperEl,
rtlTranslate: rtl,
snapGrid,
touchEventsData: data
} = swiper; // Time diff
const touchEndTime = now();
const timeDiff = touchEndTime - data.touchStartTime;
if (currentPos < -swiper.minTranslate()) {
swiper.slideTo(swiper.activeIndex);
return;
}
if (currentPos > -swiper.maxTranslate()) {
if (swiper.slides.length < snapGrid.length) {
swiper.slideTo(snapGrid.length - 1);
} else {
swiper.slideTo(swiper.slides.length - 1);
}
return;
}
if (params.freeMode.momentum) {
if (data.velocities.length > 1) {
const lastMoveEvent = data.velocities.pop();
const velocityEvent = data.velocities.pop();
const distance = lastMoveEvent.position - velocityEvent.position;
const time = lastMoveEvent.time - velocityEvent.time;
swiper.velocity = distance / time;
swiper.velocity /= 2;
if (Math.abs(swiper.velocity) < params.freeMode.minimumVelocity) {
swiper.velocity = 0;
} // this implies that the user stopped moving a finger then released.
// There would be no events with distance zero, so the last event is stale.
if (time > 150 || now() - lastMoveEvent.time > 300) {
swiper.velocity = 0;
}
} else {
swiper.velocity = 0;
}
swiper.velocity *= params.freeMode.momentumVelocityRatio;
data.velocities.length = 0;
let momentumDuration = 1000 * params.freeMode.momentumRatio;
const momentumDistance = swiper.velocity * momentumDuration;
let newPosition = swiper.translate + momentumDistance;
if (rtl) newPosition = -newPosition;
let doBounce = false;
let afterBouncePosition;
const bounceAmount = Math.abs(swiper.velocity) * 20 * params.freeMode.momentumBounceRatio;
let needsLoopFix;
if (newPosition < swiper.maxTranslate()) {
if (params.freeMode.momentumBounce) {
if (newPosition + swiper.maxTranslate() < -bounceAmount) {
newPosition = swiper.maxTranslate() - bounceAmount;
}
afterBouncePosition = swiper.maxTranslate();
doBounce = true;
data.allowMomentumBounce = true;
} else {
newPosition = swiper.maxTranslate();
}
if (params.loop && params.centeredSlides) needsLoopFix = true;
} else if (newPosition > swiper.minTranslate()) {
if (params.freeMode.momentumBounce) {
if (newPosition - swiper.minTranslate() > bounceAmount) {
newPosition = swiper.minTranslate() + bounceAmount;
}
afterBouncePosition = swiper.minTranslate();
doBounce = true;
data.allowMomentumBounce = true;
} else {
newPosition = swiper.minTranslate();
}
if (params.loop && params.centeredSlides) needsLoopFix = true;
} else if (params.freeMode.sticky) {
let nextSlide;
for (let j = 0; j < snapGrid.length; j += 1) {
if (snapGrid[j] > -newPosition) {
nextSlide = j;
break;
}
}
if (Math.abs(snapGrid[nextSlide] - newPosition) < Math.abs(snapGrid[nextSlide - 1] - newPosition) || swiper.swipeDirection === 'next') {
newPosition = snapGrid[nextSlide];
} else {
newPosition = snapGrid[nextSlide - 1];
}
newPosition = -newPosition;
}
if (needsLoopFix) {
once('transitionEnd', () => {
swiper.loopFix();
});
} // Fix duration
if (swiper.velocity !== 0) {
if (rtl) {
momentumDuration = Math.abs((-newPosition - swiper.translate) / swiper.velocity);
} else {
momentumDuration = Math.abs((newPosition - swiper.translate) / swiper.velocity);
}
if (params.freeMode.sticky) {
// If freeMode.sticky is active and the user ends a swipe with a slow-velocity
// event, then durations can be 20+ seconds to slide one (or zero!) slides.
// It's easy to see this when simulating touch with mouse events. To fix this,
// limit single-slide swipes to the default slide duration. This also has the
// nice side effect of matching slide speed if the user stopped moving before
// lifting finger or mouse vs. moving slowly before lifting the finger/mouse.
// For faster swipes, also apply limits (albeit higher ones).
const moveDistance = Math.abs((rtl ? -newPosition : newPosition) - swiper.translate);
const currentSlideSize = swiper.slidesSizesGrid[swiper.activeIndex];
if (moveDistance < currentSlideSize) {
momentumDuration = params.speed;
} else if (moveDistance < 2 * currentSlideSize) {
momentumDuration = params.speed * 1.5;
} else {
momentumDuration = params.speed * 2.5;
}
}
} else if (params.freeMode.sticky) {
swiper.slideToClosest();
return;
}
if (params.freeMode.momentumBounce && doBounce) {
swiper.updateProgress(afterBouncePosition);
swiper.setTransition(momentumDuration);
swiper.setTranslate(newPosition);
swiper.transitionStart(true, swiper.swipeDirection);
swiper.animating = true;
$wrapperEl.transitionEnd(() => {
if (!swiper || swiper.destroyed || !data.allowMomentumBounce) return;
emit('momentumBounce');
swiper.setTransition(params.speed);
setTimeout(() => {
swiper.setTranslate(afterBouncePosition);
$wrapperEl.transitionEnd(() => {
if (!swiper || swiper.destroyed) return;
swiper.transitionEnd();
});
}, 0);
});
} else if (swiper.velocity) {
emit('_freeModeNoMomentumRelease');
swiper.updateProgress(newPosition);
swiper.setTransition(momentumDuration);
swiper.setTranslate(newPosition);
swiper.transitionStart(true, swiper.swipeDirection);
if (!swiper.animating) {
swiper.animating = true;
$wrapperEl.transitionEnd(() => {
if (!swiper || swiper.destroyed) return;
swiper.transitionEnd();
});
}
} else {
swiper.updateProgress(newPosition);
}
swiper.updateActiveIndex();
swiper.updateSlidesClasses();
} else if (params.freeMode.sticky) {
swiper.slideToClosest();
return;
} else if (params.freeMode) {
emit('_freeModeNoMomentumRelease');
}
if (!params.freeMode.momentum || timeDiff >= params.longSwipesMs) {
swiper.updateProgress();
swiper.updateActiveIndex();
swiper.updateSlidesClasses();
}
}
Object.assign(swiper, {
freeMode: {
onTouchStart,
onTouchMove,
onTouchEnd
}
});
}
Zerion Mini Shell 1.0