outline/shared/editor/queries/getMarksBetween.ts

import type { Mark } from "prosemirror-model";
import type { EditorState } from "prosemirror-state";

/**
 * Get all marks that are applied to text between two positions.
 *
 * @param start The start position
 * @param end The end position
 * @param state The editor state
 * @returns A list of marks
 */
export function getMarksBetween(
  start: number,
  end: number,
  state: EditorState
) {
  let marks: { start: number; end: number; mark: Mark }[] = [];

  state.doc.nodesBetween(start, end, (node, pos) => {
    if (node.isText) {
      const nodeStart = Math.max(start, pos);
      const nodeEnd = Math.min(end, pos + node.nodeSize);

      marks = [
        ...marks,
        ...node.marks.map((mark) => ({
          start: nodeStart,
          end: nodeEnd,
          mark,
        })),
      ];
    }
  });

  return marks;
}