iTerm detection script fails when inside tmux

[JonathanAnderson]

The section in TerminalExtensions.jl that sends "\e[1337n\e[5n" fails to detect iTerm support when running inside a tmux session.

[Keno]

I think the image features of iTerm don't work in tmux either, so that's probably not a bad thing.

[JonathanAnderson]

They do work. I use them all the time.

On Wed, Nov 21, 2018 at 11:06 Keno Fischer ***@***.***> wrote: I think the image features of iTerm don't work in tmux either, so that's probably not a bad thing. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#41 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AA9_0DjD78eU5aOkLitUpcpXL9IX7qipks5uxYgFgaJpZM4X87ZV> .

-- Jon Anderson

[JonathanAnderson]

'gnuplot|imgcat' or 'curl -s image_url | imgcat' specifically will work just fine. I can even use TerminalExtensions if I manually push the display On Wed, Nov 21, 2018 at 11:32 Jon Anderson <jonathan.anderson@gmail.com> wrote:

They do work. I use them all the time. On Wed, Nov 21, 2018 at 11:06 Keno Fischer ***@***.***> wrote: > I think the image features of iTerm don't work in tmux either, so that's > probably not a bad thing. > > — > You are receiving this because you authored the thread. > Reply to this email directly, view it on GitHub > <#41 (comment)>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/AA9_0DjD78eU5aOkLitUpcpXL9IX7qipks5uxYgFgaJpZM4X87ZV> > . > -- Jon Anderson

-- Jon Anderson

[Keno]

Huh, fascinating. In that case the proprietary escape codes do make it through tmux. Not sure why iTerm doesn't respond with its ident then.

[eschnett]

imgcat begins with these lines:

# tmux requires unrecognized OSC sequences to be wrapped with DCS tmux;
# <sequence> ST, and for all ESCs in <sequence> to be replaced with ESC ESC. It
# only accepts ESC backslash for ST. We use TERM instead of TMUX because TERM
# gets passed through ssh.
function print_osc() {
    if [[ $TERM == screen* ]] ; then
        printf "\033Ptmux;\033\033]"
    else
        printf "\033]"
    fi
}

# More of the tmux workaround described above.
function print_st() {
    if [[ $TERM == screen* ]] ; then
        printf "\a\033\\"
    else
        printf "\a"
    fi
}

[Keno]

Great find. Wanna submit a PR? ;)

[eschnett]

I already typed develop TerminalExtensions.

[eschnett]

... and the result is that tmux cannot display images consistently. imgcat uses extra escape sequence to "smuggle" the image past tmux so that iTerm draws it onto the screen. Of course, once tmux decides to redraw the contents, it overwrites the image.

iTerm has a "tmux integration mode". In this mode, if you start tmux via "tmux -CC", things are already working as expected. However, this changes the way one interacts with tmux: instead of the ^b key, one now has to use iTerm menus.

[JonathanAnderson]

I’m using the integration mode to get my images with gunplot to work.

On Tue, Jan 29, 2019 at 15:04 Erik Schnetter ***@***.***> wrote: ... and the result is that tmux cannot display images consistently. imgcat uses extra escape sequence to "smuggle" the image past tmux so that iTerm draws it onto the screen. Of course, once tmux decides to redraw the contents, it overwrites the image. iTerm has a "tmux integration mode". In this mode, if you start tmux via "tmux -CC", things are already working as expected. However, this changes the way one interacts with tmux: instead of the ^b key, one now has to use iTerm menus. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#41 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AA9_0JheK4OZkAsz_c7gJGRFTmBwxiM1ks5vILdggaJpZM4X87ZV> .

-- Jon Anderson

[eschnett]

@JonathanAnderson Are you also using ssh? I'm using first ssh, then tmux on the remote system. At first glance this didn't work with tmux integration mode; tmux crashes with an error when I create a second tmux window (aka iTerm tab) ("bad working directory").

[JonathanAnderson]

I do all my work over ssh. My iTerm profile will send the following text at start tmux -CC attach -t main -d && exit I think I also did something to make the command window hide.

iTerm with tmux -CC will keep an image in the terminal until the window is closed. If you disconnect, close the window, and reconnect, the image will be gone since the encoded image data isn't saved in the terminal buffer...

[JonathanAnderson]

it seems to be working just needs a little cleanup here and there...