如何在Draft.js中插入/上传图像(更新实体和块)？

Question

我正在尝试将图像插入到Draft.js编辑器中.

根据我的理解,我需要更新实体mergeData和阻止mergeBlockData.(我不确定)

现在我想mergeBlockData用来插入一个块.

mergeBlockData(
  contentState: ContentState,
  selectionState: SelectionState,
  blockData: Map<any, any>
): ContentState

请阅读代码中的评论.

import { Map } from 'immutable';

const selection = this.state.editorState.getSelection();
const contentState = this.state.editorState.getCurrentContent();

console.log(convertToRaw(contentState));  // for example, I have 3 blocks

const blockData = Map({ ov72: {  // here how to generate a random valid key?
  "key": "ov72",
  "text": " ",
  "type": "atomic",
  "depth": 0,
  "inlineStyleRanges": [],
  "entityRanges": [{
    "offset": 0,
    "length": 1,
    "key": 1
  }],
  "data": {}
}});
const newContentState = Modifier.mergeBlockData(contentState, selection, blockData);

console.log(convertToRaw(newContentState));  // here is wrong, still 3 blocks. Also original blocks have no change

const newEditorState = EditorState.push(this.state.editorState, newContentState);

Answer 1

花了一段时间来弄清楚如何插入图像.

  insertImage = (editorState, base64) => {
    const contentState = editorState.getCurrentContent();
    const contentStateWithEntity = contentState.createEntity(
      'image',
      'IMMUTABLE',
      { src: base64 },
    );
    const entityKey = contentStateWithEntity.getLastCreatedEntityKey();
    const newEditorState = EditorState.set(
      editorState,
      { currentContent: contentStateWithEntity },
    );
    return AtomicBlockUtils.insertAtomicBlock(newEditorState, entityKey, ' ');
  };

然后你可以使用

const base64 = 'aValidBase64String';
const newEditorState = this.insertImage(this.state.editorState, base64);
this.setState({ editorState: newEditorState });

对于渲染图像,您可以使用Draft.js图像插件.

现场演示: codesandbox

该演示插入了Twitter徽标图像.

如果要从本地文件插入图像,可以尝试使用FileReaderAPI来获取该base64.

有关如何获取base64,很简单,请检查

现场演示: jsbin

现在继续将它们放在一起,您可以从本地文件上传图像!