如何阻止DraftJS光标跳到文本的开头？

Question

使用DraftJS和Meteor应用程序任务的代码--做一个实时预览，其中来自DraftJS的文本将保存到DB，而从DB则显示在另一个组件上。

但问题是，一旦数据来自DB，而我试图编辑DraftJS游标，移到开头。

代码是

import {Editor, EditorState, ContentState} from 'draft-js';
import React, { Component } from 'react';
import { TestDB } from '../api/yaml-component.js';
import { createContainer } from 'meteor/react-meteor-data';
import PropTypes from 'prop-types';

class EditorComponent extends Component {
  constructor(props) {
    super(props);
    this.state = {
        editorState : EditorState.createEmpty(),
    };
  }

  componentWillReceiveProps(nextProps) {
    console.log('Receiving Props');
    if (!nextProps) return;
    console.log(nextProps);
    let j = nextProps.testDB[0];
    let c = ContentState.createFromText(j.text);
    this.setState({
      editorState: EditorState.createWithContent(c),
    })
  }

  insertToDB(finalComponentStructure) {
    if (!finalComponentStructure) return;
    finalComponentStructure.author = 'Sandeep3005';
    Meteor.call('testDB.insert', finalComponentStructure);
  }


  _handleChange(editorState) {
    console.log('Inside handle change');
    let contentState = editorState.getCurrentContent();
    this.insertToDB({text: contentState.getPlainText()});
    this.setState({editorState});
  }

  render() {
    return (
      <div>
        <Editor
          placeholder="Insert YAML Here"
          editorState={this.state.editorState}
          onChange={this._handleChange.bind(this)}
        />
      </div>
    );
  }
}


    EditorComponent.propTypes = {
     staff: PropTypes.array.isRequired,
    };

    export default createContainer(() => {
      return {
        staff: Staff.find({}).fetch(),
      };
    }, EditorComponent);

任何正确方向的有用的评论都是有用的。

Answer 1

当您调用EditorState.createWithContent(c)时，草案将为您返回一个新的EditorState，但它不知道您当前的SelectionState。相反，它只会在新ContentState的第一个块中创建一个新的空选择。

要克服这个问题，您必须自己设置SelectionState，使用当前状态的SelectionState，例如：

const stateWithContent = EditorState.createWithContent(c)
const currentSelection = this.state.editorState.getSelection()
const stateWithContentAndSelection = EditorState.forceSelection(stateWithContent, currentSelection)

this.setState({
  editorState: stateWithContentAndSelection
})

Answer 2

有一个属性可以将焦点移到末尾：

const newState = EditorState.createEmpty()
this.setState({
 editorState:
  EditorState.moveFocusToEnd(newState)
 })

这对我有用。

Answer 3

您所需要做的就是在内置于静态EditorState方法的内部传递给定的EditorState.moveSelectionToEnd()：

const editorState = EditorState.createEmpty();
const editorStateWithFocusOnTheEnd = EditorState.moveSelectionToEnd(editorState)