View images with external program

[indeedwatson]

What do you want

Open images with a selected image viewer, as opposed to browser, much like
rtv has for media.

Likewise, open yt or twitch links with mpv.

UI wise, something similar to termite's url hints mode would be an option, or
alternatively if the user selects a message which contains a link, pressing for
example o would open the link in the external program.

Why

Browserless workflow is pretty neat. Or rather, keeping the browser for more
important things and using lighter dedicated tools for media.

This seems to me like the second best solution to images, since embedding seems more complicated, and even with embedded images, going fullscreen is often necessary.

[avahe-kellenberger]

This would be pretty neat to have. I use a specific terminal that can manage this by piping the content to xdg-open just for this reason, but having it built into cordless sounds like a good idea.

For the implementation, we could probably follow an example like pso which allows you to write regex to match content (like a link or file path) with a program, then start the program in any way your desire.

[Bios-Marcel]

You can do this now! #314