set -e; . /usr/local/lib/bash-bear; set +e
+xf=$(mktemp)
+xrandr >$xf
-output=HDMI2
-output=DP1
+# eg eDP-1 connected primary
+laptop_out=$(awk '$3 == "primary" {print $1}' $xf)
+output=$(grep -E "^(HDMI|DP)[^ ]* connected [0-9]" $xf| awk '{print $1}' ||:)
-if xrandr | grep -q "^$output disconnected" &>/dev/null; then
- xrandr --auto
-else
- xrandr --output $output --off
- sleep 2
- xrandr --output $output --right-of eDP1 --mode 3840x2160
+edid() {
+ card=$1
+ sha256sum </sys/class/drm/$card/edid | grep -oE '^.{10}'
+}
+
+restart=false
+left_right_arg=--right-of
+if [[ $output ]]; then
+
+ mode=$(grep -A1 -E "^$output" $xf | tail -n1 | awk '{print $1}')
+
+ primary_res=$(awk '$2 == "connected" && $3 == "primary" { print $4 }' $xf | sed 's/+.*//')
+ primary_x=${primary_res%x*}
+
+ x=${mode%x*}
+ y=${mode#*x}
+
+ half_x=$(( x / 2 ))
+
+ x_offset=$primary_x
+
+ # identify monitors that are always on the left.
+ if [[ $output == HDMI2 && $(edid card0-HDMI-A-2) == 192efbdcef ]] || \
+ [[ $output == HDMI-1 && $(edid card1-HDMI-A-1 ) == 7c58f9ac1e ]]; then
+ left_right_arg=--left-of
+ x_offset=0
+ fi
+
+ # some monitors need off then on to become active
+ if $restart; then
+ xrandr --output $output --off
+ sleep 2
+ fi
- for i in 1 2 4 5 6 7 8 9 10; do
- # if the workspace is already there, this will fail
+
+ # eg: 3840x2160
+ echo mode=$mode
+ xrandr --output $output $left_right_arg $laptop_out --mode $mode
+
+
+ # This splits a monitor into 2 virtual screens, which makes it split
+ # into 2 workspaces in i3, which is a much more convenient setup for
+ # managing windows.
+ # todo: add an option to turn this off
+ # todo: do this on systems with just 1 monitor.
+ #
+ # /298 & 336 are millimeters. I took them from a monitor I was using. I
+ # don't know if they are important, I assume not important enough to
+ # change for different monitors.
+
+ for x in LEFT RIGHT; do
+ if xrandr --listmonitors | awk '$2 == BIG-'$x |grep . >/dev/null; then
+ xrandr --delmonitor BIG-$x
+ fi
+ done
+ xrandr --setmonitor BIG-LEFT $half_x/298x$y/336+0+$x_offset $output
+ xrandr --setmonitor BIG-RIGHT $half_x/298x$y/336+$(( x_offset + half_x ))+0 none
+
+
+ for i in 2 3 4 5 6 7 8 9 10; do
+ # if the workspace is already there, this will fail.
+ # if the workspace doesn't exist yet, it fails with:
+ # ERROR: No output matched
i3-msg '[workspace="'$i'"]' move workspace to output $output ||:
done
+else
+ xrandr --auto
+
fi