34 lines
1.8 KiB
JavaScript
34 lines
1.8 KiB
JavaScript
import { invariant } from '../../utils/errors.mjs';
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import * as React from 'react';
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import { forwardRef, useContext } from 'react';
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import { ReorderContext } from '../../context/ReorderContext.mjs';
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import { motion } from '../../render/dom/motion.mjs';
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import { useConstant } from '../../utils/use-constant.mjs';
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import { useMotionValue } from '../../value/use-motion-value.mjs';
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import { useTransform } from '../../value/use-transform.mjs';
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import { isMotionValue } from '../../value/utils/is-motion-value.mjs';
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function useDefaultMotionValue(value, defaultValue = 0) {
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return isMotionValue(value) ? value : useMotionValue(defaultValue);
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}
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function ReorderItem({ children, style = {}, value, as = "li", onDrag, layout = true, ...props }, externalRef) {
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const Component = useConstant(() => motion(as));
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const context = useContext(ReorderContext);
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const point = {
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x: useDefaultMotionValue(style.x),
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y: useDefaultMotionValue(style.y),
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};
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const zIndex = useTransform([point.x, point.y], ([latestX, latestY]) => latestX || latestY ? 1 : "unset");
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invariant(Boolean(context), "Reorder.Item must be a child of Reorder.Group");
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const { axis, registerItem, updateOrder } = context;
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return (React.createElement(Component, { drag: axis, ...props, dragSnapToOrigin: true, style: { ...style, x: point.x, y: point.y, zIndex }, layout: layout, onDrag: (event, gesturePoint) => {
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const { velocity } = gesturePoint;
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velocity[axis] &&
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updateOrder(value, point[axis].get(), velocity[axis]);
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onDrag && onDrag(event, gesturePoint);
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}, onLayoutMeasure: (measured) => registerItem(value, measured), ref: externalRef, ignoreStrict: true }, children));
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}
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const Item = forwardRef(ReorderItem);
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export { Item, ReorderItem };
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