Alt key seems to be ignored.

[alok]

I type <A-d> in vim and instead of executing a mapping, it gives the key sequence <2202> and does nothing.

[drew-gross]

I'm not a VIM user. What is the expected behaviour?

[alok]

It should executed whatever mapping I assigned to it. In this case,
deleting a line.
On Thu, Oct 13, 2016 at 7:46 PM Drew notifications@github.com wrote:

I'm not a VIM user. What is the expected behaviour?

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[drew-gross]

Sorry, I was hoping for some easy steps to follow to help me reproduce the issue. Basically, I want some instructions that I can follow in both black-screen and iTerm the exhibit different behaviour (assuming no existing vim configuration).

[alok]

To reproduce:

create a vimrc and add this line:

nnoremap <M-d> dd

Create a nonempty file. In iterm and black-screen, press and it should recognize the keystroke in iterm and delete the line (which is what dd does). In black-screen, it should do nothing.

[drew-gross]

Hmmm for me iTerm alt+d also does nothing when I use that vimrc. It's very confusing actually, I try various combinations of different keys and commands and they do totally unpredictable things.

[alok]

I suspect your iTerm alt key is not set to meta or esc+.

Go to Preferences > Profiles in iTerm. select your profile and go to the keys tab. the option is on the bottom right.

Most people seem to use esc+ according to iTerm's FAQ.

[vlad-shatskyi]

To fix it in Job.write we can check whether alt is pressed, and if it is, convert the sequence to ESC + whatever key.

https://www.w3.org/TR/uievents/#dom-keyboardevent-altkey

[drew-gross]

@alok can you tell me what shows up in both black-screen and your usual terminal if you execute sleep 10 and then press alt+d? Having vim stuff involved is making is difficult to figure out what the correct behaviour is, and I'm not super familiar with the terminal emulation side of this project (I've mostly worked on plugins and UI stuff).

[alok]

iterm: (nothing)
black-screen: ∂

[drew-gross]

@alok How about if you press it a few times in iTerm? Do you see a bunch of � symbols? Also, #852 may fix your issue but I'm not very familiar with that part of the code. If you could pull that branch and try it out to see if it fixes your issue, I would very much appreciate that.

[alok]

Pressing it any number of times put no input on the screen. I'll try
pulling that and see if it helps.

-- Alok

On Sun, Oct 30, 2016 at 9:41 PM, Drew notifications@github.com wrote:

@alok https://github.com/Alok How about if you press it a few times in
iTerm? Do you see a bunch of � symbols? Also, #852
#852 may fix your issue
but I'm not very familiar with that part of the code. If you could pull
that branch and try it out to see if it fixes your issue, I would very much
appreciate that.

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[alok]

So I tried #852 and it fixed it, though typing <a-d> in the command line (outside of vim) still puts the ∂. On the other hand, it works, so good job.

Also, I don't think you should call the pull request "fix alt-d" as it's an issue with the alt key and probably has nothing to do with that letter in particular.

[drew-gross]

Thanks a lot for verifying. The fix only applies when you are sending keystrokes to a running program, not when you are typing into the command line. I think that's probably appropriate, what would alt+* do when typing into the command line anyway? We probably want to leave the up to the OS.