376 lines
11 KiB
JavaScript
376 lines
11 KiB
JavaScript
import { ref, watch, reactive, computed, onMounted, onActivated, onDeactivated, onBeforeUnmount, defineComponent, nextTick, createVNode as _createVNode } from "vue";
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import { clamp, isHidden, truthProp, numericProp, windowWidth, windowHeight, preventDefault, createNamespace, makeNumericProp } from "../utils/index.mjs";
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import { doubleRaf, useChildren, useEventListener, usePageVisibility } from "@vant/use";
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import { useTouch } from "../composables/use-touch.mjs";
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import { useExpose } from "../composables/use-expose.mjs";
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import { onPopupReopen } from "../composables/on-popup-reopen.mjs";
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const [name, bem] = createNamespace("swipe");
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const swipeProps = {
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loop: truthProp,
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width: numericProp,
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height: numericProp,
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vertical: Boolean,
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autoplay: makeNumericProp(0),
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duration: makeNumericProp(500),
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touchable: truthProp,
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lazyRender: Boolean,
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initialSwipe: makeNumericProp(0),
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indicatorColor: String,
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showIndicators: truthProp,
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stopPropagation: truthProp
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};
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const SWIPE_KEY = Symbol(name);
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var stdin_default = defineComponent({
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name,
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props: swipeProps,
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emits: ["change", "dragStart", "dragEnd"],
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setup(props, {
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emit,
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slots
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}) {
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const root = ref();
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const track = ref();
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const state = reactive({
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rect: null,
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width: 0,
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height: 0,
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offset: 0,
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active: 0,
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swiping: false
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});
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let dragging = false;
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const touch = useTouch();
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const {
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children,
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linkChildren
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} = useChildren(SWIPE_KEY);
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const count = computed(() => children.length);
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const size = computed(() => state[props.vertical ? "height" : "width"]);
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const delta = computed(() => props.vertical ? touch.deltaY.value : touch.deltaX.value);
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const minOffset = computed(() => {
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if (state.rect) {
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const base = props.vertical ? state.rect.height : state.rect.width;
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return base - size.value * count.value;
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}
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return 0;
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});
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const maxCount = computed(() => size.value ? Math.ceil(Math.abs(minOffset.value) / size.value) : count.value);
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const trackSize = computed(() => count.value * size.value);
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const activeIndicator = computed(() => (state.active + count.value) % count.value);
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const isCorrectDirection = computed(() => {
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const expect = props.vertical ? "vertical" : "horizontal";
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return touch.direction.value === expect;
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});
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const trackStyle = computed(() => {
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const style = {
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transitionDuration: `${state.swiping ? 0 : props.duration}ms`,
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transform: `translate${props.vertical ? "Y" : "X"}(${+state.offset.toFixed(2)}px)`
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};
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if (size.value) {
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const mainAxis = props.vertical ? "height" : "width";
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const crossAxis = props.vertical ? "width" : "height";
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style[mainAxis] = `${trackSize.value}px`;
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style[crossAxis] = props[crossAxis] ? `${props[crossAxis]}px` : "";
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}
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return style;
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});
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const getTargetActive = (pace) => {
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const {
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active
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} = state;
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if (pace) {
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if (props.loop) {
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return clamp(active + pace, -1, count.value);
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}
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return clamp(active + pace, 0, maxCount.value);
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}
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return active;
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};
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const getTargetOffset = (targetActive, offset = 0) => {
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let currentPosition = targetActive * size.value;
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if (!props.loop) {
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currentPosition = Math.min(currentPosition, -minOffset.value);
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}
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let targetOffset = offset - currentPosition;
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if (!props.loop) {
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targetOffset = clamp(targetOffset, minOffset.value, 0);
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}
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return targetOffset;
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};
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const move = ({
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pace = 0,
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offset = 0,
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emitChange
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}) => {
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if (count.value <= 1) {
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return;
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}
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const {
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active
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} = state;
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const targetActive = getTargetActive(pace);
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const targetOffset = getTargetOffset(targetActive, offset);
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if (props.loop) {
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if (children[0] && targetOffset !== minOffset.value) {
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const outRightBound = targetOffset < minOffset.value;
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children[0].setOffset(outRightBound ? trackSize.value : 0);
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}
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if (children[count.value - 1] && targetOffset !== 0) {
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const outLeftBound = targetOffset > 0;
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children[count.value - 1].setOffset(outLeftBound ? -trackSize.value : 0);
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}
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}
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state.active = targetActive;
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state.offset = targetOffset;
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if (emitChange && targetActive !== active) {
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emit("change", activeIndicator.value);
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}
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};
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const correctPosition = () => {
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state.swiping = true;
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if (state.active <= -1) {
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move({
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pace: count.value
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});
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} else if (state.active >= count.value) {
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move({
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pace: -count.value
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});
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}
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};
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const prev = () => {
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correctPosition();
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touch.reset();
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doubleRaf(() => {
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state.swiping = false;
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move({
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pace: -1,
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emitChange: true
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});
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});
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};
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const next = () => {
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correctPosition();
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touch.reset();
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doubleRaf(() => {
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state.swiping = false;
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move({
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pace: 1,
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emitChange: true
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});
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});
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};
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let autoplayTimer;
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const stopAutoplay = () => clearTimeout(autoplayTimer);
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const autoplay = () => {
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stopAutoplay();
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if (+props.autoplay > 0 && count.value > 1) {
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autoplayTimer = setTimeout(() => {
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next();
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autoplay();
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}, +props.autoplay);
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}
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};
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const initialize = (active = +props.initialSwipe) => {
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if (!root.value) {
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return;
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}
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const cb = () => {
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var _a, _b;
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if (!isHidden(root)) {
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const rect = {
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width: root.value.offsetWidth,
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height: root.value.offsetHeight
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};
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state.rect = rect;
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state.width = +((_a = props.width) != null ? _a : rect.width);
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state.height = +((_b = props.height) != null ? _b : rect.height);
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}
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if (count.value) {
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active = Math.min(count.value - 1, active);
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if (active === -1) {
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active = count.value - 1;
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}
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}
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state.active = active;
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state.swiping = true;
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state.offset = getTargetOffset(active);
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children.forEach((swipe) => {
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swipe.setOffset(0);
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});
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autoplay();
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};
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if (isHidden(root)) {
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nextTick().then(cb);
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} else {
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cb();
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}
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};
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const resize = () => initialize(state.active);
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let touchStartTime;
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const onTouchStart = (event) => {
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if (!props.touchable || // avoid resetting position on multi-finger touch
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event.touches.length > 1) return;
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touch.start(event);
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dragging = false;
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touchStartTime = Date.now();
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stopAutoplay();
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correctPosition();
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};
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const onTouchMove = (event) => {
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if (props.touchable && state.swiping) {
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touch.move(event);
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if (isCorrectDirection.value) {
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const isEdgeTouch = !props.loop && (state.active === 0 && delta.value > 0 || state.active === count.value - 1 && delta.value < 0);
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if (!isEdgeTouch) {
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preventDefault(event, props.stopPropagation);
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move({
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offset: delta.value
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});
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if (!dragging) {
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emit("dragStart", {
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index: activeIndicator.value
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});
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dragging = true;
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}
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}
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}
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}
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};
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const onTouchEnd = () => {
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if (!props.touchable || !state.swiping) {
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return;
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}
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const duration = Date.now() - touchStartTime;
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const speed = delta.value / duration;
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const shouldSwipe = Math.abs(speed) > 0.25 || Math.abs(delta.value) > size.value / 2;
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if (shouldSwipe && isCorrectDirection.value) {
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const offset = props.vertical ? touch.offsetY.value : touch.offsetX.value;
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let pace = 0;
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if (props.loop) {
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pace = offset > 0 ? delta.value > 0 ? -1 : 1 : 0;
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} else {
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pace = -Math[delta.value > 0 ? "ceil" : "floor"](delta.value / size.value);
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}
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move({
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pace,
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emitChange: true
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});
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} else if (delta.value) {
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move({
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pace: 0
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});
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}
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dragging = false;
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state.swiping = false;
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emit("dragEnd", {
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index: activeIndicator.value
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});
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autoplay();
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};
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const swipeTo = (index, options = {}) => {
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correctPosition();
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touch.reset();
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doubleRaf(() => {
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let targetIndex;
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if (props.loop && index === count.value) {
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targetIndex = state.active === 0 ? 0 : index;
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} else {
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targetIndex = index % count.value;
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}
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if (options.immediate) {
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doubleRaf(() => {
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state.swiping = false;
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});
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} else {
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state.swiping = false;
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}
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move({
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pace: targetIndex - state.active,
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emitChange: true
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});
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});
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};
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const renderDot = (_, index) => {
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const active = index === activeIndicator.value;
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const style = active ? {
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backgroundColor: props.indicatorColor
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} : void 0;
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return _createVNode("i", {
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"style": style,
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"class": bem("indicator", {
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active
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})
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}, null);
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};
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const renderIndicator = () => {
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if (slots.indicator) {
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return slots.indicator({
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active: activeIndicator.value,
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total: count.value
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});
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}
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if (props.showIndicators && count.value > 1) {
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return _createVNode("div", {
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"class": bem("indicators", {
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vertical: props.vertical
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})
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}, [Array(count.value).fill("").map(renderDot)]);
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}
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};
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useExpose({
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prev,
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next,
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state,
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resize,
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swipeTo
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});
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linkChildren({
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size,
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props,
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count,
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activeIndicator
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});
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watch(() => props.initialSwipe, (value) => initialize(+value));
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watch(count, () => initialize(state.active));
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watch(() => props.autoplay, autoplay);
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watch([windowWidth, windowHeight, () => props.width, () => props.height], resize);
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watch(usePageVisibility(), (visible) => {
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if (visible === "visible") {
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autoplay();
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} else {
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stopAutoplay();
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}
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});
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onMounted(initialize);
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onActivated(() => initialize(state.active));
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onPopupReopen(() => initialize(state.active));
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onDeactivated(stopAutoplay);
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onBeforeUnmount(stopAutoplay);
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useEventListener("touchmove", onTouchMove, {
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target: track
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});
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return () => {
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var _a;
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return _createVNode("div", {
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"ref": root,
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"class": bem()
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}, [_createVNode("div", {
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"ref": track,
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"style": trackStyle.value,
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"class": bem("track", {
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vertical: props.vertical
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}),
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"onTouchstartPassive": onTouchStart,
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"onTouchend": onTouchEnd,
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"onTouchcancel": onTouchEnd
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}, [(_a = slots.default) == null ? void 0 : _a.call(slots)]), renderIndicator()]);
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};
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}
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});
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export {
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SWIPE_KEY,
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stdin_default as default,
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swipeProps
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};
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