framer-motion
Version:
A simple and powerful JavaScript animation library
34 lines (31 loc) • 1.82 kB
JavaScript
import { jsx } from 'react/jsx-runtime';
import { invariant } from '../../utils/errors.mjs';
import { forwardRef, useContext } from 'react';
import { ReorderContext } from '../../context/ReorderContext.mjs';
import { motion } from '../../render/dom/motion.mjs';
import { useConstant } from '../../utils/use-constant.mjs';
import { useMotionValue } from '../../value/use-motion-value.mjs';
import { useTransform } from '../../value/use-transform.mjs';
import { isMotionValue } from '../../value/utils/is-motion-value.mjs';
function useDefaultMotionValue(value, defaultValue = 0) {
return isMotionValue(value) ? value : useMotionValue(defaultValue);
}
function ReorderItem({ children, style = {}, value, as = "li", onDrag, layout = true, ...props }, externalRef) {
const Component = useConstant(() => motion(as));
const context = useContext(ReorderContext);
const point = {
x: useDefaultMotionValue(style.x),
y: useDefaultMotionValue(style.y),
};
const zIndex = useTransform([point.x, point.y], ([latestX, latestY]) => latestX || latestY ? 1 : "unset");
invariant(Boolean(context), "Reorder.Item must be a child of Reorder.Group");
const { axis, registerItem, updateOrder } = context;
return (jsx(Component, { drag: axis, ...props, dragSnapToOrigin: true, style: { ...style, x: point.x, y: point.y, zIndex }, layout: layout, onDrag: (event, gesturePoint) => {
const { velocity } = gesturePoint;
velocity[axis] &&
updateOrder(value, point[axis].get(), velocity[axis]);
onDrag && onDrag(event, gesturePoint);
}, onLayoutMeasure: (measured) => registerItem(value, measured), ref: externalRef, ignoreStrict: true, children: children }));
}
const Item = forwardRef(ReorderItem);
export { Item, ReorderItem };