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import PropTypes from 'prop-types';
import React from 'react';
import ReactDOM from 'react-dom';
import TransitionGroup from './TransitionGroup';
/**
* The `<ReplaceTransition>` component is a specialized `Transition` component
* that animates between two children.
*
* ```jsx
* <ReplaceTransition in>
* <Fade><div>I appear first</div></Fade>
* <Fade><div>I replace the above</div></Fade>
* </ReplaceTransition>
* ```
*/
class ReplaceTransition extends React.Component {
handleEnter = (...args) => this.handleLifecycle('onEnter', 0, args);
handleEntering = (...args) => this.handleLifecycle('onEntering', 0, args);
handleEntered = (...args) => this.handleLifecycle('onEntered', 0, args);
handleExit = (...args) => this.handleLifecycle('onExit', 1, args);
handleExiting = (...args) => this.handleLifecycle('onExiting', 1, args);
handleExited = (...args) => this.handleLifecycle('onExited', 1, args);
handleLifecycle(handler, idx, originalArgs) {
const { children } = this.props;
const child = React.Children.toArray(children)[idx];
if (child.props[handler]) child.props[handler](...originalArgs);
if (this.props[handler]) {
const maybeNode = child.props.nodeRef
? undefined
: ReactDOM.findDOMNode(this);
this.props[handler](maybeNode);
}
}
render() {
const { children, in: inProp, ...props } = this.props;
const [first, second] = React.Children.toArray(children);
delete props.onEnter;
delete props.onEntering;
delete props.onEntered;
delete props.onExit;
delete props.onExiting;
delete props.onExited;
return (
<TransitionGroup {...props}>
{inProp
? React.cloneElement(first, {
key: 'first',
onEnter: this.handleEnter,
onEntering: this.handleEntering,
onEntered: this.handleEntered,
})
: React.cloneElement(second, {
key: 'second',
onEnter: this.handleExit,
onEntering: this.handleExiting,
onEntered: this.handleExited,
})}
</TransitionGroup>
);
}
}
ReplaceTransition.propTypes = {
in: PropTypes.bool.isRequired,
children(props, propName) {
if (React.Children.count(props[propName]) !== 2)
return new Error(
`"${propName}" must be exactly two transition components.`
);
return null;
},
};
export default ReplaceTransition;
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