modeling-app/src/editor/plugins/lsp/util.ts

import { Text } from '@codemirror/state'

export function posToOffset(
  doc: Text,
  pos: { line: number; character: number }
): number | undefined {
  if (pos.line >= doc.lines) return
  const offset = doc.line(pos.line + 1).from + pos.character
  if (offset > doc.length) return
  return offset
}

export function offsetToPos(doc: Text, offset: number) {
  const line = doc.lineAt(offset)
  return {
    line: line.number - 1,
    character: offset - line.from,
  }
}