@atlaskit/renderer/dist/es2019/ui/annotations/draft/text.js

Renderer component

import React from 'react';
export const findTextString = reactNode => {
  let result = null;
  const children = React.Children.toArray(reactNode);
  for (const childNode of children) {
    if (result) {
      break;
    } else if (typeof childNode === 'string') {
      result = childNode;
    } else if (isReactElement(childNode) && childNode.props.children) {
      result = findTextString(childNode.props.children);
    }
  }
  return result;
};
function isReactElement(child) {
  return !!child.type;
}
export const splitText = (text, {
  startOffset,
  endOffset
}) => {
  if (endOffset > text.length || endOffset - startOffset <= 0) {
    return null;
  }
  return [text.slice(0, startOffset), text.slice(startOffset, endOffset), text.slice(endOffset)].filter(Boolean);
};
export const calcTextSplitOffset = (position, textPosition, text) => {
  const {
    start,
    end
  } = textPosition;
  const startOffset = Math.max(position.from - start, 0);
  const endOffset = Math.min(Math.abs(end - position.to - text.length), text.length);
  return {
    startOffset,
    endOffset
  };
};