Gap Cursor

import 'prosekit/basic/style.css'
import 'prosekit/basic/typography.css'

import { createEditor } from 'prosekit/core'
import { ProseKit } from 'prosekit/react'
import { useMemo } from 'react'

import { defineExtension } from './extension'

export default function Editor() {
  const editor = useMemo(() => {
    return createEditor({ extension: defineExtension(), defaultContent })
  }, [])

  return (
    <ProseKit editor={editor}>
      <div className="box-border h-full w-full min-h-36 overflow-y-hidden overflow-x-hidden rounded-md border border-solid border-gray-200 dark:border-gray-700 shadow flex flex-col bg-white dark:bg-gray-950 color-black dark:color-white">
        <div className="relative w-full flex-1 box-border overflow-y-scroll">
          <div ref={editor.mount} className="ProseMirror box-border min-h-full px-[max(4rem,_calc(50%-20rem))] py-8 outline-none outline-0 [&_span[data-mention=user]]:text-blue-500 [&_span[data-mention=tag]]:text-violet-500"></div>
        </div>
      </div>
    </ProseKit>
  )
}

const defaultContent = `
<p>Click the gap between two images or press arrow keys to see the gap cursor between two images</p>
<img src="https://placehold.co/200x100" />
<img src="https://placehold.co/200x100" />
`

import { defineBaseKeymap } from 'prosekit/core'
import { union } from 'prosekit/core'
import { defineDoc } from 'prosekit/extensions/doc'
import { defineGapCursor } from 'prosekit/extensions/gap-cursor'
import { defineImage } from 'prosekit/extensions/image'
import { defineParagraph } from 'prosekit/extensions/paragraph'
import { defineText } from 'prosekit/extensions/text'

export function defineExtension() {
  return union(
    defineBaseKeymap(),
    defineDoc(),
    defineText(),
    defineParagraph(),
    defineGapCursor(),
    defineImage(),
  )
}

export type EditorExtension = ReturnType<typeof defineExtension>