Re: Help needed on terminal mappings

Lifepillar wrote:

> I have my terminal (Terminal.app on macOS) configured with the
> following mappings:
>
> Shift+Left_arrow \033[1;2D
> Shift+Right_arrow \033[1;2C
> Alt+Left_arrow \033b
> Alt+Right_arrow \033f
>
> The latter two, in particular, allow me to jump between words in
> a shell using Alt+arrows.
>
> Besides, in my vimrc, I have the following:
>
> set <s-left>=^[b
> set <s-right>=^[f
>
> (^[ is literal Esc). With those, I can use Shift/Alt + arrows to
> jump between words in the command line and in buffers.
>
> In Vim's terminal, however, Alt+arrows send ^[1;2C and ^[1;2D, like
> Shift+arrows. How can I configure Vim so that Alt+arrows behave the
> same as in my shell (i.e., jump between words)?
>
> I have tried:
>
> tmap <a-left> ^[b
> tmap <s-left> ^[b
>
> to no avail. If I remove those two lines above from my vimrc, then
> Alt+arrows correctly send ^[b and ^[f in Vim's terminal, but I lose
> the ability to use Alt+arrows elsewhere.

This runs into a few limitations, main problem is that these keys are
not supported by termcap. Vim does not recognize them as specific keys,
but you can map the escape sequence. However, that doesn't work for
passing the code on to the terminal.

Ideally Vim would recognize the key, but that requires a lot of work.
And then libvterm needs to be able to handle it (a quick check is that
this isn't done properly, it mixes up ESC and CSI).

Assuming you just want to make this work for your specific setup and
accept that it's not portable: We can define escape sequences that Vim
passes on literally to the program runnin in the terminal window.
That's very flexible, but not portable.

Hmm, perhaps you could try something like this:

:tmap <expr> <Esc>b SendToTerm("\<Esc>b")
func SendToTerm(what)
call term_sendkeys('', a:what)
return ''
endfunc

No idea if this works, haven't tried it.

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I'm really quite busy.

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