dynamic-rule | 基于groovy的动态规则调用 | Rule Engine library

I'm currently refactoring a project that is using Python widgets along with JavaScript. It currently uses a table with a reorder feature that could use some major improvements. When using the "reorderRowDown" button, it works correctly the current row moves down and the previous and next row adjust accordingly.

However, on the "reorderRowUp" button the current row simply alternates back and forth between the current and previous row. (I hope I'm explaining this well, my apologies) It's very clunky moving the current row up the table.

I would like to achieve the functionality similar to "reorderRowDown" where when clicking "reorderRowUp" the current row moves up and the previous and next row adjust accordingly. In summary, I would like to know how to implement reordering of the rows in the table either up or down the correct way. Any help would be greatly appreciated.

(Here are gifs posted below to better demonstrate the scenarios I'm referencing)

reorderRowDown Example:

https://media.giphy.com/media/8WHiGw57pPTK9Zdibk/giphy.gif

reorderRowUp Example:

https://media.giphy.com/media/Wp7x9GtYDX29cFLT6I/giphy.gif

Here's my code (please let me know if you require more)

PathContext.js