79 lines
2.0 KiB
JavaScript
79 lines
2.0 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @flow
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*/
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'use strict';
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const Incremental = require('Incremental');
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const React = require('React');
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const PropTypes = require('prop-types');
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const infoLog = require('infoLog');
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let _groupCounter = -1;
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const DEBUG = false;
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import type {Props, Context} from 'Incremental';
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/**
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* WARNING: EXPERIMENTAL. Breaking changes will probably happen a lot and will
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* not be reliably announced. The whole thing might be deleted, who knows? Use
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* at your own risk.
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*
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* `<Incremental>` components must be wrapped in an `<IncrementalGroup>` (e.g.
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* via `<IncrementalPresenter>`) in order to provide the incremental group
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* context, otherwise they will do nothing.
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*
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* See Incremental.js for more info.
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*/
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class IncrementalGroup extends React.Component<Props & {disabled?: boolean}> {
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context: Context;
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_groupInc: string;
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UNSAFE_componentWillMount() {
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this._groupInc = `g${++_groupCounter}-`;
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DEBUG && infoLog('create IncrementalGroup with id ' + this.getGroupId());
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}
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getGroupId(): string {
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const ctx = this.context.incrementalGroup;
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const prefix = ctx ? ctx.groupId + ':' : '';
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return prefix + this._groupInc + this.props.name;
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}
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getChildContext(): Context {
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if (this.props.disabled || this.context.incrementalGroupEnabled === false) {
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return {
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incrementalGroupEnabled: false,
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incrementalGroup: null,
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};
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}
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return {
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incrementalGroupEnabled: true,
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incrementalGroup: {
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groupId: this.getGroupId(),
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incrementalCount: -1,
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},
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};
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}
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render(): React.Node {
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return (
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<Incremental onDone={this.props.onDone} children={this.props.children} />
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);
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}
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}
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IncrementalGroup.contextTypes = {
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incrementalGroup: PropTypes.object,
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incrementalGroupEnabled: PropTypes.bool,
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};
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IncrementalGroup.childContextTypes = IncrementalGroup.contextTypes;
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module.exports = IncrementalGroup;
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