bracketed paste in conhost

[davidanthoff]

Does the Windows console support bracket paste mode? I wasn't able to find any information about that.

[DHowett-MSFT]

Funny you should ask! I've been working on this one myself, as I'd love to see it land.
I'll mark this one with our backlog/tracking tags.

[vapier]

one suggestion to keep in mind (as I've seen more than one implementation forget this edge case): make sure to filter out control sequences when pasting. otherwise the buffer could embed the end sequence thus defeating the point of it.

if you want to be compatible with xterm (who invented this feature), you want to filter:
\x00-\x07
\x0b-\x0c
\x0e-\x1f

[oising]

@DHowett-MSFT -- worth ingesting this page here concerning the security issues various implementations of bracketed paste mode may have: https://lwn.net/Articles/749992/ -- particularly http://thejh.net/misc/website-terminal-copy-paste

[miniksa]

@oising, thank you for that read. I think the best thing we could do is write tests for the specific security issues listed there and attempt to mitigate them as we implement the bracketed paste mode.

[chris-morgan]

Would it be possible and/or reasonable for starters to just have ConPTY pass through ESC [ ? 2004 h and ESC [ ? 2004 l on stdout, and ESC [ 200 ~ and ESC [ 201 ~ on stdin, so that other terminals that support bracketed paste (e.g. Alacritty) can support it? (It makes me sad when such terminal emulators are blocked from supporting functionality on Windows because ConPTY filters out the magic.)

[FlipperPA]

@DHowett Dustin, thanks for pointing me to this issue from the one I had opened concerning pasting into IPython / vi. Are there any workarounds in the meantime?

[DHowett-MSFT]

In the meantime, before/after pasting in vim you can :set paste and :set nopaste. I'm not certain what ipy needs here, unfortunately. ☹️

[FlipperPA]

Several similar workarounds for ipython on Ubuntu for anyone looking:

• Type %autoindent to turn off automatic indentation, then pasting will work.
• Type %cpaste and then paste, and then -- to end, and it will work, if you want to leave automatic indentation on.

This will not persist between ipython sessions. To make this change permanent, you can create a configuration file a la vi ~/.ipython/profile_default/ipython_config.py, and put these contents in it:

c = get_config()
c.InteractiveShell.autoindent = False

I hope this helps someone!

[davidanthoff]

Done!

[FlipperPA]

Just a big THANK YOU to everyone involved - this is a huge time saver and help for my workflow.

[blayz3r]

@davidanthoff my work is to bring bracketed paste into Windows Terminal. The support for bracketed paste in Conhost is yet to be done. I understand this issue is probably opened when Windows Terminal wasn’t really a thing, but here it is.

We may want to reopen this and change the title to just “bracketed paste in conhost”.

So bracketed paste will not work in ConPTY atm? correct?

[zadjii-msft]

No it should work just fine in conpty (the Terminal uses conpty too 😉). Conhost (the vintage console) still needs to implement support for this itself, but that should be much simpler now.

[blayz3r]

No it should work just fine in conpty (the Terminal uses conpty too 😉). Conhost (the vintage console) still needs to implement support for this itself, but that should be much simpler now.

Ok great, is there a preview version on ConPty. or do we have to wait for the new release:
Context using conpty in Gvim:

[dashesy]

I have 1.15.2875.0 but this seems to be unsupported still.

[DHowett]

I have 1.15.2875.0 but this seems to be unsupported still.

@dashesy i would encourage you to file a new issue and fill out the issue template. As far as we are aware, paste bracketing works fine for every client application that requests it. Filing a new issue would be the best way to draw attention to, and provide specific information about, the problem you're facing.