Swap iTerm2 cursors in vim insert mode when using tmux

.vimrc

" tmux will only forward escape sequences to the terminal if surrounded by a DCS sequence
" http://sourceforge.net/mailarchive/forum.php?thread_name=AANLkTinkbdoZ8eNR1X2UobLTeww1jFrvfJxTMfKSq-L%2B%40mail.gmail.com&forum_name=tmux-users

if exists('$TMUX')
  let &t_SI = "\<Esc>Ptmux;\<Esc>\<Esc>]50;CursorShape=1\x7\<Esc>\\"
  let &t_EI = "\<Esc>Ptmux;\<Esc>\<Esc>]50;CursorShape=0\x7\<Esc>\\"
else
  let &t_SI = "\<Esc>]50;CursorShape=1\x7"
  let &t_EI = "\<Esc>]50;CursorShape=0\x7"
endif

@jcorbin looks like it works, I'll try it on for awhile 👍

@breerly here's an adapted copy of your functions that work under tmux using the DCS escape mentioned by OP: https://github.com/jcorbin/home/blob/master/.zsh/rc.d/vi-mode-cursor

@jcorbin ^ works on osx w/ zshell + tmux! thanks a lot! 👍

@jcorbin I spoke too soon: it works well until you open up another pane. Switching between the two means that the cursor get's carried along, even if the pane you're switching to is in command mode. This leads to situations where you get the block cursor but you're actually in insert mode, and vice versa.

@silesky, were you able to find a workaround for pane switching?

Thanks @jcorbin

thanks

Thanks!

How can I get this working in the case of running ssh and opening vim on a remote machine from within a local tmux session?

https://stackoverflow.com/questions/42377945/vim-adding-cursorshape-support-over-tmux-ssh

@AdamBrodzinski
Try adding this line to your .vimrc to get rid of the delay while switching between normal mode and insert mode

set timeoutlen=1000 ttimeoutlen=0

Thanks!

We should all get together for a drink some day.

Thanks!

A note if you are using tmux with a custom term-info (like many tutorials in the internet instructs you to have something like - italic in vim)
This is what you want inside your tmux.conf (assuming using iterm2 + tmux)

set -g default-terminal 'tmux-256color' # replace this with your custom term-info name
set -ga terminal-overrides ',*:Tc' # this is for 256 color
set -ga terminal-overrides '*:Ss=\E[%p1%d q:Se=\E[ q' # this is for the cursor shape

won't work for tmux 2.6 and terminator