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https://github.com/status-im/react-native.git
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5e91a2a312
Summary: - Replace some fixes that were accidentally lost in local rebase that prevent jumpiness when incremental is disabled. - Require each row to have a key specified by the caller to prevent jumping because of accidental duplicates or unneeded/problematic row re-rendering because of legit re-ordering. Reviewed By: steveluscher Differential Revision: D3322006 fbshipit-source-id: 0019aab07cb1fe2b148a14b5818de53aa373eb50
84 lines
2.2 KiB
JavaScript
84 lines
2.2 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule IncrementalGroup
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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 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 {
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props: Props & {disabled?: boolean};
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context: Context;
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_groupInc: string;
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componentWillMount() {
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this._groupInc = `g${++_groupCounter}-`;
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DEBUG && infoLog(
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'create IncrementalGroup with id ' + this.getGroupId()
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);
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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(): ReactElement {
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return (
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<Incremental
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onDone={this.props.onDone}
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children={this.props.children}
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/>
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);
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}
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}
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IncrementalGroup.contextTypes = {
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incrementalGroup: React.PropTypes.object,
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incrementalGroupEnabled: React.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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