Add support to (un)staging hunks when using git: diff (with the same shortcuts)

[3v1n0]

When using the git: diff current file inline I can stage/unstage hunks by using h / H, I was expecting to be able to do the same when just using git: diff (and git: diff current file), hunk by hunk (no support for line adding of course in this case).

[stoivo]

If you ? you can see all commands for views like these. This should be a cool addon. Probably we just need to pass a --reset to apply if this is the case.

Is super+shift+ENTER a good key?

Would you like to open a PR?

[3v1n0]

I'd just stay consistent using h/H as it happens in inline mode...

As Ctrl+Enter already does it.

[stoivo]

@divmain, @randy3k, @asfaltboy. Is it too mush to have the keyboard shortcut from super+enter to h for it to have the same key binding as in the inline diff?
The view is read-only so the user shouldn't want to type h anyway.

Or maybe keep super+enter and then hand H.

[3v1n0]

Yah, I'd keep Super/Ctrl+enter around... While adding h/H as alias.

I think those views should be consistent in keybinding, so if the views do the same things, they should use the same values.

[randy3k]

I prefer using h/l/H/L keybinds.

[divmain]

Adding key aliases could make things messy pretty quick - the keybindings file is already pretty massive! However, I do like keeping Super+Enter for this use case, while it also completely makes sense to use H and L. So maybe we can make an exception for aliasing here. I'm fine adding the functionality, and adding h/l/H/L keybindings in the same PR.