79 lines
2.0 KiB
JavaScript
79 lines
2.0 KiB
JavaScript
/**
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*
|
|
* @format
|
|
* @flow
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
const Incremental = require('Incremental');
|
|
const React = require('React');
|
|
|
|
const PropTypes = require('prop-types');
|
|
|
|
const infoLog = require('infoLog');
|
|
|
|
let _groupCounter = -1;
|
|
const DEBUG = false;
|
|
|
|
import type {Props, Context} from 'Incremental';
|
|
|
|
/**
|
|
* WARNING: EXPERIMENTAL. Breaking changes will probably happen a lot and will
|
|
* not be reliably announced. The whole thing might be deleted, who knows? Use
|
|
* at your own risk.
|
|
*
|
|
* `<Incremental>` components must be wrapped in an `<IncrementalGroup>` (e.g.
|
|
* via `<IncrementalPresenter>`) in order to provide the incremental group
|
|
* context, otherwise they will do nothing.
|
|
*
|
|
* See Incremental.js for more info.
|
|
*/
|
|
class IncrementalGroup extends React.Component<Props & {disabled?: boolean}> {
|
|
context: Context;
|
|
_groupInc: string;
|
|
UNSAFE_componentWillMount() {
|
|
this._groupInc = `g${++_groupCounter}-`;
|
|
DEBUG && infoLog('create IncrementalGroup with id ' + this.getGroupId());
|
|
}
|
|
|
|
getGroupId(): string {
|
|
const ctx = this.context.incrementalGroup;
|
|
const prefix = ctx ? ctx.groupId + ':' : '';
|
|
return prefix + this._groupInc + this.props.name;
|
|
}
|
|
|
|
getChildContext(): Context {
|
|
if (this.props.disabled || this.context.incrementalGroupEnabled === false) {
|
|
return {
|
|
incrementalGroupEnabled: false,
|
|
incrementalGroup: null,
|
|
};
|
|
}
|
|
return {
|
|
incrementalGroupEnabled: true,
|
|
incrementalGroup: {
|
|
groupId: this.getGroupId(),
|
|
incrementalCount: -1,
|
|
},
|
|
};
|
|
}
|
|
|
|
render(): React.Node {
|
|
return (
|
|
<Incremental onDone={this.props.onDone} children={this.props.children} />
|
|
);
|
|
}
|
|
}
|
|
IncrementalGroup.contextTypes = {
|
|
incrementalGroup: PropTypes.object,
|
|
incrementalGroupEnabled: PropTypes.bool,
|
|
};
|
|
IncrementalGroup.childContextTypes = IncrementalGroup.contextTypes;
|
|
|
|
module.exports = IncrementalGroup;
|