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#!/bin/sh
#
# The MIT License (MIT)
#
# Copyright (c) 2017-2018 Thomas "Ventto" Venriès <thomas.venries@gmail.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
usage() {
echo 'Usage: mons [OPTION]...
Without argument, it prints connected monitors list with their names and ids.
Options are exclusive and can be used in conjunction with extra options.
Information:
-h Prints this help and exits.
-v Prints version and exits.
Two monitors:
-o Primary monitor only.
-s Second monitor only.
-d Duplicates the primary monitor.
-m Mirrors the primary monitor.
-e <side>
Extends the primary monitor to the selected side
[ top | left | right | bottom ].
-n <side>
This mode selects the previous ones, one after another. The argument
sets the side for the extend mode.
More monitors:
-O <mon>
Only enables the monitor with a specified id.
-S <mon1>,<mon2>:<pos>
Only enables two monitors with specified ids. The specified position
places the second monitor on the right (R) or at the top (T).
Extra (in-conjunction or alone):
--dpi <dpi>
Set the DPI, a strictly positive value within the range [0 ; 27432].
--primary <mon_name>
Select a connected monitor as the primary output. Run the script
without argument to print monitors information, the names are in the
second column between ids and status. The primary monitor is marked
by an asterisk.
Daemon mode:
-a Performs an automatic display if it detects only one monitor.
'
}
version() {
echo 'Mons 0.8.2
Copyright (C) 2017 Thomas "Ventto" Venries.
License MIT: <https://opensource.org/licenses/MIT>.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
'
}
# Helps to generate manpage with help2man before installing the library
[ "$1" = '-h' ] && { usage; exit; }
[ "$1" = '-v' ] && { version; exit; }
lib='/usr/lib/libshlist/liblist.sh'
[ ! -r "$lib" ] && { "$lib: library not found."; exit 1; }
. "${lib}"
arg_err() {
usage ; exit 2
}
enable_mon() {
"${XRANDR}" --output "${1}" --auto --dpi "${dpi}"
}
disable_mons() {
for mon in $@; do "${XRANDR}" --output "${mon}" --off ; done
}
arg2xrandr() {
case $1 in
left) echo '--left-of' ;;
right) echo '--right-of' ;;
bottom) echo '--below' ;;
top) echo '--above' ;;
esac
}
whichmode() {
if [ "$(list_size "${disp_mons}")" -eq 1 ]; then
if echo "${enabled_out}" | grep prima > /dev/null 2>&1; then
echo 'primary'
else
echo 'second'
fi
else
if [ "$(list_size "${plug_mons}")" -gt 2 ] ; then
echo 'selection'; return 0
fi
enabled_out="$(echo "${enabled_out}" | \
sed 's/^.*\( [0-9]\+\x[0-9]\++[0-9]\++[0-9]\+\).*/\1/')"
echo "${enabled_out}" | head -n1 | sed -e 's/+/ /g' | \
while read -r trash x1 y1; do
echo "${enabled_out}" | tail -n1 | sed -e 's/x/ /' -e 's/+/ /g' | \
while read -r w2 h2 x2 y2; do
echo "${xrandr_out}" | \
awk "/^$(list_get 1 "${plug_mons}")/{nr[NR+1]}; NR in nr" | \
awk '{print $1;}' | sed -e 's/x/ /' | \
while read -r wi2 hi2; do
if [ "$x1" = "$x2" ] && [ "$y1" = "$y2" ]; then
if [ "$w2" != "$wi2" ] || [ "$h2" != "$hi2" ]; then
echo 'mirror'
else
echo 'duplicate'
fi
else
echo 'extend'
fi
done
done
done
fi
}
main() {
aFlag=false
dFlag=false
eFlag=false
mFlag=false
nFlag=false
oFlag=false
sFlag=false
OFlag=false
SFlag=false
pFlag=false
iFlag=false
is_flag=false
# X has assumed 96 DPI and this is fine for many traditional monitors.
dpi=96
primary=
# getopts does not support long options. We convert them to short one.
for arg in "$@"; do
shift
case "$arg" in
--dpi) set -- "$@" '-i' ;;
--primary) set -- "$@" '-p' ;;
*) set -- "$@" "$arg"
esac
done
while getopts 'hvamosde:n:O:S:i:p:' opt; do
case $opt in
# Long options
i)
if ! echo "${OPTARG}" | \
grep -E '^[1-9][0-9]*$' > /dev/null 2>&1; then
arg_err
fi
iFlag=true; dpi="$OPTARG"
;;
p) if ! echo "${OPTARG}" | \
grep -E '^[a-zA-Z][a-zA-Z0-9\-]+' > /dev/null 2>&1; then
arg_err
fi
pFlag=true; primary="$OPTARG"
;;
# Short options
a) $is_flag && arg_err
aFlag=true ; is_flag=true
;;
m) $is_flag && arg_err
mFlag=true ; is_flag=true
;;
o) $is_flag && arg_err
oFlag=true ; is_flag=true
;;
s) $is_flag && arg_err
sFlag=true ; is_flag=true
;;
d) $is_flag && arg_err
dFlag=true ; is_flag=true
;;
e|n) $is_flag && arg_err
case ${OPTARG} in
left | right | bottom | top) ;;
*) arg_err ;;
esac
eArg=$OPTARG
[ "$opt" = "e" ] && eFlag=true || nFlag=true ; is_flag=true
;;
O) $is_flag && arg_err
! echo "${OPTARG}" | grep -E '^[0-9]+$' > /dev/null && arg_err
OArg=$OPTARG
OFlag=true ; is_flag=true
;;
S) $is_flag && arg_err
idx1="$(echo "${OPTARG}" | cut -d',' -f1)"
idx2="$(echo "${OPTARG}" | cut -d',' -f2)"
area="$(echo "${idx2}" | cut -d ':' -f2)"
idx2="$(echo "${idx2}" | cut -d ':' -f1)"
! echo "${idx1}" | grep -E '^[0-9]+$' > /dev/null && arg_err
! echo "${idx2}" | grep -E '^[0-9]+$' > /dev/null && arg_err
! echo "${area}" | grep -E '^[RT]$' > /dev/null && arg_err
[ "${idx1}" = "${idx2}" ] && arg_err
SFlag=true ; is_flag=true
;;
h) usage ; exit ;;
v) version ; exit ;;
\?) arg_err ;;
:) arg_err ;;
esac
done
[ -z "${DISPLAY}" ] && { echo 'DISPLAY: no variable set.'; exit 1; }
XRANDR="$(command -v xrandr)"
[ "$?" -ne 0 ] && { echo 'xrandr: command not found.'; exit 1; }
# DPI set
$iFlag && [ "$#" -eq 2 ] && { "${XRANDR}" --dpi "$dpi"; exit; }
# Daemon mode
if $aFlag ; then
prev=0; i=0
while true; do
for status in /sys/class/drm/*/status; do
[ "$(<"$status")" = 'connected' ] && i=$((i+1))
done
if [ "$i" -eq 1 ] && [ "$i" != "$prev" ]; then
"${XRANDR}" --auto --dpi "${dpi}"
fi
prev="$i"; i=0
sleep 2
done
fi
# List all outputs (except primary one)
xrandr_out="$("${XRANDR}")"
enabled_out="$(echo "${xrandr_out}" | grep 'connect')"
[ -z "${enabled_out}" ] && { echo 'No monitor output detected.'; exit; }
mons="$(echo "${enabled_out}" | cut -d' ' -f1)"
# List plugged-in and turned-on outputs
enabled_out="$(echo "${enabled_out}" | grep ' connect')"
[ -z "${enabled_out}" ] && { echo 'No plugged-in monitor detected.'; exit 1; }
plug_mons="$(echo "${enabled_out}" | cut -d' ' -f1)"
if [ "$(list_size "${plug_mons}")" -eq 0 ]; then
echo "No monitor plugged-in."
exit 0
fi
# Set primary output
if $pFlag; then
if ! list_contains "${primary}" "${plug_mons}"; then
echo "${primary}: output not connected."
exit 1
fi
"${XRANDR}" --output "${primary}" --primary
[ "$#" -eq 2 ] && exit
else
primary="$(echo "${enabled_out}" | grep 'primary' | cut -d' ' -f1)"
fi
# Move the primary monitor to the head if connected otherwise the first
# connected monitor that appears in the xrandr output is considerate as
# the primary one.
if [ -n "${primary}" ]; then
plug_mons="$(list_erase "${primary}" "${plug_mons}")"
plug_mons="$(list_insert "${primary}" 0 "${plug_mons}")"
fi
enabled_out="$(echo "${enabled_out}" | grep -E '\+[0-9]{1,4}\+[0-9]{1,4}')"
disp_mons="$(echo "${enabled_out}" | cut -d' ' -f1)"
if [ "$#" -eq 0 ]; then
echo "Monitors: $(list_size "${plug_mons}")"
echo "Mode: $(whichmode)"
i=0
for mon in ${mons}; do
if echo "${plug_mons}" | grep "^${mon}$" > /dev/null; then
if echo "${disp_mons}" | grep "^${mon}$" > /dev/null; then
state='(enabled)'
fi
if [ "${mon}" = "${primary}" ]; then
printf '%-4s %-8s %-8s %-8s\n' "${i}:*" "${mon}" "${state}"
else
printf '%-4s %-8s %-8s\n' "${i}:" "${mon}" "${state}"
fi
fi
i=$((i+1))
state=
done
exit
fi
if $nFlag ; then
case "$(whichmode)" in
primary) sFlag=true;;
second) eFlag=true;;
extend) mFlag=true;;
mirror) dFlag=true;;
duplicate) oFlag=true;;
esac
fi
if [ "$(list_size "${plug_mons}")" -eq 1 ] ; then
if $oFlag ; then
# After unplugging each monitor, the last preferred one might be
# still turned off or the window manager might need the monitor
# reset to cause the reconfiguration of the layout placement.
"${XRANDR}" --auto --dpi "${dpi}"
else
echo 'Only one monitor detected.'
fi
exit
fi
if $oFlag ; then
if [ "$(list_size "${disp_mons}")" -eq 1 ]; then
if [ "$(list_front "${disp_mons}")" = "$(list_front "${plug_mons}")" ]; then
exit
fi
fi
disp_mons="$(list_erase "$(list_front "${plug_mons}")" "$disp_mons")"
disable_mons "${disp_mons}"
enable_mon "$(list_front "${plug_mons}")"
exit
fi
if $OFlag ; then
if [ "${OArg}" -ge "$(list_size "${mons}")" ] ; then
echo "Monitor ID '${OArg}' does not exist."
echo 'Try without option to get monitor ID list.'
exit 2
fi
mons_elt="$(list_get "${OArg}" "${mons}")"
if ! list_contains "${mons_elt}" "${plug_mons}"; then
echo "Monitor ID '${OArg}' not plugged in."
echo 'Try without option to get monitor ID list.'
exit 2
fi
disp_mons="$(list_erase "${mons_elt}" "${disp_mons}")"
disable_mons "${disp_mons}"
enable_mon "${mons_elt}"
exit
fi
if $SFlag ; then
if [ "${idx1}" -ge "$(list_size "${mons}")" ] || \
[ "${idx2}" -ge "$(list_size "${mons}")" ]; then
echo 'One or both monitor IDs do not exist.'
echo 'Try without option to get monitor ID list.'
exit 2
fi
if ! list_contains "$(list_get "${idx1}" "${mons}")" "${plug_mons}" || \
! list_contains "$(list_get "${idx2}" "${mons}")" "${plug_mons}" ; then
echo 'One or both monitor IDs are not plugged in.'
echo 'Try without option to get monitor ID list.'
exit 2
fi
[ "${area}" = 'R' ] && area="--right-of" || area="--above"
mon1="$(list_get "${idx1}" "${mons}")"
mon2="$(list_get "${idx2}" "${mons}")"
disp_mons="$(list_erase "${mon1}" "${disp_mons}")"
disp_mons="$(list_erase "${mon2}" "${disp_mons}")"
disable_mons "${disp_mons}"
enable_mon "${mon1}"
enable_mon "${mon2}"
"${XRANDR}" --output "${mon2}" "${area}" "${mon1}"
exit
fi
if [ "$(list_size "${plug_mons}")" -eq 2 ]; then
if $sFlag ; then
if [ "$(list_size "${disp_mons}")" -eq 1 ] ; then
if [ "$(list_front "${disp_mons}")" = "$(list_get 1 "${plug_mons}")" ] ; then
enable_mon "$(list_get 1 "${plug_mons}")"
exit
fi
fi
enable_mon "$(list_get 1 "${plug_mons}")"
disable_mons "$(list_front "${disp_mons}")"
exit
fi
# Resets the screen configuration
disable_mons "$(list_get 1 "${plug_mons}")"
"${XRANDR}" --auto --dpi "${dpi}"
if $dFlag ; then
"${XRANDR}" --output "$(list_get 1 "${plug_mons}")" \
--same-as "$(list_front "${plug_mons}")"
exit $?
fi
if $mFlag ; then
xrandr_out="$(echo "${xrandr_out}" | \
awk "/primary/{nr[NR]; nr[NR+1]}; NR in nr")"
if echo "${xrandr_out}" | \
grep -E 'primary [0-9]+x[0-9]+' >/dev/null 2>&1; then
size="$(echo "${xrandr_out}" | head -n1 | cut -d' ' -f4 | \
cut -d'+' -f1)"
else
size="$(echo "${xrandr_out}" | tail -n1 | awk '{ print $1 }')"
fi
"${XRANDR}" --output "$(list_get 1 "${plug_mons}")" \
--auto --scale-from "${size}" \
--output "$(list_front "${plug_mons}")"
exit $?
fi
if $eFlag ; then
"${XRANDR}" --output "$(list_get 1 "${plug_mons}")" \
"$(arg2xrandr "$eArg")" "$(list_front "${plug_mons}")"
exit $?
fi
else
echo 'At most two plugged monitors for this option.'
fi
}
main "$@"
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