home/rc/windowing/sway.kak
DixiE 0048e9f488 Support focus Within Sway WM
While Wayland offers nothing general to help us support `focus` on all
window managers, WM-specific implementations are generally possible.
Sway is a tiling window manager that mimics i3, and has a reasonably
powerful CLI that can help us achieve this.

In addition to supporting `focus` for Sway, this change paves the way
for additional WM-specific Wayland functionality by adding a detection
step to wayland.kak, in a similar fashion to detection.kak.
2022-06-02 10:57:28 +01:00

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provide-module sway %{
# Ensure we're actually in Sway
evaluate-commands %sh{
[ -z "${kak_opt_windowing_modules}" ] ||
[ -n "$SWAYSOCK" ] ||
echo 'fail SWAYSOCK is not set'
}
require-module 'wayland'
define-command sway-focus-pid -hidden %{
evaluate-commands %sh{
pid=$kak_client_pid
# Try to focus a window with the current PID, walking up the tree of
# parent processes until the focus eventually succeeds
while ! swaymsg [pid=$pid] focus > /dev/null 2> /dev/null ; do
# Replace the current PID with its parent PID
pid=$(ps -p $pid -o ppid=)
# If we couldn't get a PPID for some reason, or it's 1 or less, we
# should just fail.
if [ -z $pid ] || [ $pid -le 1 ]; then
echo "fail Can't find PID for Sway window to focus"
break
fi
done
}
}
define-command sway-focus -params ..1 -docstring '
sway-focus [<kakoune_client>]: focus a given client''s window.
If no client is passed, then the current client is used' \
%{
# Quick branch to make sure we're calling sway-focus-pid from the client
# the user wants to focus on.
evaluate-commands %sh{
if [ $# -eq 1 ]; then
printf "evaluate-commands -client '%s' sway-focus-pid" "$1"
else
echo sway-focus-pid
fi
}
}
complete-command sway-focus client
unalias global focus
alias global focus sway-focus
}