custom-app/dhcc-app-dll/node_modules/draft-js/lib/DraftEditorPlaceholder.react.js.flow

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/**
 * Copyright (c) 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * @providesModule DraftEditorPlaceholder.react
 * @format
 * @flow
 */

'use strict';

import type { DraftTextAlignment } from './DraftTextAlignment';
import type EditorState from './EditorState';

const React = require('react');

const cx = require('fbjs/lib/cx');

type Props = {
  accessibilityID: string;
  editorState: EditorState;
  text: string;
  textAlignment: DraftTextAlignment;
};

/**
 * This component is responsible for rendering placeholder text for the
 * `DraftEditor` component.
 *
 * Override placeholder style via CSS.
 */
class DraftEditorPlaceholder extends React.Component<Props> {
  shouldComponentUpdate(nextProps: Props): boolean {
    return this.props.text !== nextProps.text || this.props.editorState.getSelection().getHasFocus() !== nextProps.editorState.getSelection().getHasFocus();
  }

  render(): React.Node {
    const hasFocus = this.props.editorState.getSelection().getHasFocus();

    const className = cx({
      'public/DraftEditorPlaceholder/root': true,
      'public/DraftEditorPlaceholder/hasFocus': hasFocus
    });

    const contentStyle = {
      whiteSpace: 'pre-wrap'
    };

    return <div className={className}>
        <div className={cx('public/DraftEditorPlaceholder/inner')} id={this.props.accessibilityID} style={contentStyle}>
          {this.props.text}
        </div>
      </div>;
  }
}

module.exports = DraftEditorPlaceholder;