How to process text before copying using mouse click?

[siddhpant]

I have ctrl+right enabled for copying to clipboard.

But for git hashes, I only want to copy the first 12 characters even if I selected the entire thing. Basically, selection[:12]. I want to map this stripping flow to ctrl+triplepress right.

Is there a way to achieve this?

[kovidgoyal]

Use the hints kitten, it can do arbitrary things to pices of text on the screen. You will trigger it with keyboard but once triggerred you can click on matches to select them.