@portabletext/editor/src/utils/util.get-block-end-point.ts

Portable Text Editor made in React

import {
  isPortableTextSpan,
  isPortableTextTextBlock,
  type KeyedSegment,
  type PortableTextBlock,
} from '@sanity/types'
import type {EditorSelectionPoint} from '../types/editor'

/**
 * @public
 */
export function getBlockEndPoint({
  node,
  path,
}: {
  node: PortableTextBlock
  path: [KeyedSegment]
}): EditorSelectionPoint {
  if (isPortableTextTextBlock(node)) {
    const lastChild = node.children[node.children.length - 1]

    if (lastChild) {
      return {
        path: [...path, 'children', {_key: lastChild._key}],
        offset: isPortableTextSpan(lastChild) ? lastChild.text.length : 0,
      }
    }
  }

  return {
    path,
    offset: 0,
  }
}