Ah, I see the link to your GitHub repo:
https://github.com/szarroug3/X-Ray_Calibre_Plugin
And the related repos:
https://github.com/szarroug3/X-Ray-Creator
https://github.com/szarroug3/X-Ray-Creator-2
So you've ported Ephemerality's more advanced work? Nice!
Will have to take this out for a spin...
@BR: GUI plugin
Code:
[*][URL="https://www.mobileread.com/forums/showthread.php?t=273189"]X-Ray Creator[/URL]
[I]A plugin to create X-Ray files for MOBI books
Version: 1.0.0; Released: 04-18-2016; Calibre: 0.9.29; Author: szarroug3; History: No;
Platforms: Windows, OSX, Linux[/I]