[iterm2-discuss] imgcat and tmux may not play nice if output is delayed

[Raymond Page]

Just wanted to share that anyone using iTerm2 and tmux with unreliable
imgcat behavior, it could be due to the DCS timeout in the tmux code.
The workaround is to buffer the image output prior to sending DCS command
to tmux.

https://github.com/tmux/tmux/issues/1388

__dcs () { printf "\u1bP$1" ; }
__st() { printf "\u1b\" ; }
case "${TERM}" in
screen*|tmux*) __tmux_guard() { dd bs=1 count=1 2> /dev/null; __dcs
"tmux;\x1b\x1b" ; sed 's:\x1b:\x1b\x1b:g' ; __st; };;
*) alias __tmux_guard="cat";;
esac





print_image from line 28 of imgcat, could be modified so that it's used
like "print_image | __tmux_guard", __tmux_guard will wait for 1 byte of
data on stdin, assume that it's an escape sequence \033, \x1b, \u1b,
consume it, assume we've got buffered stdin and can trigger the DCS to tmux.