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"use strict";
exports.__esModule = true;
exports.default = useAnimationFrame;
var _react = require("react");
var _useMounted = _interopRequireDefault(require("./useMounted"));
var _useStableMemo = _interopRequireDefault(require("./useStableMemo"));
var _useWillUnmount = _interopRequireDefault(require("./useWillUnmount"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
/**
* Returns a controller object for requesting and cancelling an animation freame that is properly cleaned up
* once the component unmounts. New requests cancel and replace existing ones.
*
* ```ts
* const [style, setStyle] = useState({});
* const animationFrame = useAnimationFrame();
*
* const handleMouseMove = (e) => {
* animationFrame.request(() => {
* setStyle({ top: e.clientY, left: e.clientY })
* })
* }
*
* const handleMouseUp = () => {
* animationFrame.cancel()
* }
*
* return (
* <div onMouseUp={handleMouseUp} onMouseMove={handleMouseMove}>
* <Ball style={style} />
* </div>
* )
* ```
*/
function useAnimationFrame() {
const isMounted = (0, _useMounted.default)();
const handle = (0, _react.useRef)();
const cancel = () => {
if (handle.current != null) {
cancelAnimationFrame(handle.current);
}
};
(0, _useWillUnmount.default)(cancel);
return (0, _useStableMemo.default)(() => ({
request(cancelPrevious, fn) {
if (!isMounted()) return;
if (cancelPrevious) cancel();
handle.current = requestAnimationFrame(fn || cancelPrevious);
},
cancel
}), []);
}