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Various enhancements #10

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Various enhancements #10

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21178f3
refactor stuff, add user_output with support for notifications
sh-ow Oct 18, 2016
a0f6c03
add work/presentation mode, fully flexible outputs for the three screens
sh-ow Oct 18, 2016
0e12cab
add systemd service file for reconfiguring displays after waking up f…
sh-ow Oct 18, 2016
7dcc58f
remove noprimary setting as primary for another screen is sufficient
sh-ow Oct 20, 2016
c07d7e9
cleanup in function declare_outputs
sh-ow Oct 20, 2016
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9 changes: 9 additions & 0 deletions data/systemd-service/sleep-display-visor.service
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Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
[Unit]
Description=Reconfigure the displays after waking up from sleep

[Service]
Type=oneshot
ExecStart=/usr/bin/pkill -x -RTMIN+5 display-visor

[Install]
WantedBy=sleep.target
317 changes: 172 additions & 145 deletions src/display-visor
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Original file line number Diff line number Diff line change
@@ -1,19 +1,29 @@
#!/bin/bash
version="0.4"
notif_header_outputchange="Monitor settings change"
screen0=LVDS1
screen1=HDMI1
screen2=VGA1

usage ()
{
echo \
'Usage: display-visor [-f] [-i] [-l [switch]]
echo "Usage: display-visor [-h] [-f] [-i] [-l [switch]] [-n] [-e] [-0 [screen]] [-1 [screen]] [-2 [screen]] [-v]

-h, --help Print this help.
-f, --feh Run feh bg script.
Executes ~/.fehbg upon completion.
-i, --i3 Test for i3wm instance.
For avoiding conflict with multiple environments.
-l, --lid Check laptop lid status.
Ignored/Assumed closed if not given.
Ignored/Assumed closed if not given.
It is possible to specify switch. Defaults to 'LID0'
If unsure, look under /proc/acpi/button/lid/...
-n, --notif Issue a notification on each monitor change.
This uses notify-send over dbus. Notification daemon has to be running.
-e, --noecho Don't echo each monitor change.
-0, --screen0 Specify new name for screen 0 (default: LVDS1).
-1, --screen1 Specify new name for screen 1 (default: HDMI1).
-2, --screen2 Specify new name for screen 2 (default: VGA1).
-v, --version Print version info.

Useful for setting monitor layouts on system login/resume/hotplug
Expand All @@ -22,192 +32,209 @@ usage ()
Depends on xorg-xrandr.

This is free software.
2015, Michael Heyns <https://github.com/beanaroo>
'
2015, Michael Heyns <https://github.com/beanaroo>"
}

handle_args ()
{
while [ "$1" != "" ]; do
case $1 in
-h | --help ) usage
exit
;;
-f | --feh ) fehbg=true
;;
-i | --i3 ) i3test=true
;;
-l | --lid ) lidtest=true
lidswitch=${2:-LID0}
lidstatus=$(cat /proc/acpi/button/lid/$lidswitch/state 2>/dev/null | awk '{print $NF}')
shift
;;
-v | --version ) echo "display-visor $version"
exit
;;
* ) usage
exit 1
;;
exit;;
-f | --feh ) fehbg=true;;
-i | --i3 ) i3test=true;;
-l | --lid ) lidtest=true
if [ "${2:0:1}" == - -o -z "$2" ]; then
lidswitch=LID0
else
lidswitch=$2
shift
fi
lidstatus=$(cat /proc/acpi/button/lid/$lidswitch/state 2>/dev/null | awk '{print $NF}');;
-n | --notif ) notification=true;;
-e | --noecho ) noecho=true;;
-0 | --screen0 ) screen0=$2
shift;;
-1 | --screen1 ) screen1=$2
shift;;
-2 | --screen2 ) screen2=$2
shift;;
-v | --version ) echo "display-visor v$version"
exit;;
* ) usage
exit 1;;
esac
shift
done
}


## Error Handling
## error handling
handle_err ()
{
# Test for running Xorg server
if [ -z "$(ps -C Xorg --no-headers)" ]; then
echo "$prefix No Xorg server found. Exiting..."
exit 1
fi

# Test for running instance of i3
if [ "$i3test" == "true" -a -z "$(ps -C i3 --no-headers)" ]; then
echo "$prefix i3wm not running. Exiting..."
exit 1
fi

# Test for valid laptop lid status.
if [ "$lidtest" == "true" -a -z "$lidstatus" ]; then
echo "$prefix Laptop lid switch $lidswitch not found. Exiting..."
exit 1
fi
# test for running Xorg server
if [ -z "$(ps -C Xorg --no-headers)" ]; then
user_output "$prefix No Xorg server found. Exiting..."
exit 1
fi

# test for running instance of i3
if [ "$i3test" == "true" -a -z "$(ps -C i3 --no-headers)" ]; then
user_output "$prefix i3wm not running. Exiting..."
exit 1
fi

# test for valid laptop lid status
if [ "$lidtest" == "true" -a -z "$lidstatus" ]; then
user_output "$prefix Laptop lid switch $lidswitch not found. Exiting..."
exit 1
fi
}

# user output
user_output ()
{
if [ "$1" ]; then
if [ -z "$noecho" ]; then
echo $prefix $1
fi
if [ "$2" == "1" -a "$notification" ]; then
notify-send -u low -a "display-visor" "$3" "$1"
fi
fi
}

## Declare Output Devices
## declare output devices
declare_outputs ()
{
devices=$(find /sys/class/drm/*/status)
while read l ; do
dir=$(dirname $l)
status=$(cat $l)
dev=$(echo $dir | cut -d\- -f 2-)

if [ $(expr match $dev "HDMI") != "0" ]; then
dev=HDMI${dev#HDMI-?-}
else
dev=$(echo $dev | tr -d '-')
fi

if [ "connected" == "$status" ]; then
echo "$prefix $dev connected"
declare -gA $dev="yes"
fi
done <<< "$devices"
devices=$(find /sys/class/drm/*/status)
while read l ; do
dev=$(echo $(dirname $l) | cut -d\- -f 2-)

if [ $(expr match $dev "HDMI") != "0" ]; then
dev=HDMI${dev#HDMI-?-}
else
dev=$(echo $dev | tr -d '-')
fi

if [ "connected" == $(cat $l) ]; then
user_output "$dev connected"
declare -gA $dev="yes"
fi
done <<< "$devices"
}

## Configure monitors for closed lid
## configure monitors for closed lid
config_closed_lid ()
{
if [ "$lidstatus" == "closed" ]; then
echo "$prefix Laptop lid is closed"
elif [ -n "$LVDS1" -a -z "$lidtest" ]; then
echo "$prefix Laptop display will be ignored unless -l option is set"
fi
if [ -n "$HDMI1" -a -n "$VGA1" ]; then
echo "$prefix SETTING: HDMI1 (Primary) - VGA1 (Right)"
xrandr --output LVDS1 --off \
--output HDMI1 --auto --primary \
--output VGA1 --auto --right-of HDMI1
elif [ -n "$HDMI1" -a -z "$VGA1" ]; then
echo "$prefix SETTING: HDMI1 (Primary)"
xrandr --output LVDS1 --off \
--output VGA1 --off \
--output HDMI1 --auto --primary
elif [ -z "$HDMI1" -a -n "$VGA1" ]; then
echo "$prefix SETTING: VGA1 (Primary)"
xrandr --output LVDS1 --off \
--output HDMI1 --off \
--output VGA1 --auto --primary
else
echo "$prefix No external monitors are plugged in"
xrandr --output HDMI1 --off \
--output VGA1 --off \
--output LVDS1 --auto --primary
fi
if [ "$lidstatus" == "closed" ]; then
user_output "Laptop lid is closed."
elif [ "${!screen0}" -a -z "$lidtest" ]; then
user_output "Laptop display will be ignored unless -l option is set."
fi
if [ "${!screen1}" -a "${!screen2}" ]; then
user_output "SETTING: $screen1 (Primary) - $screen2 (Right)." 1 "$notif_header_outputchange"
xrandr --output $screen0 --off \
--output $screen1 --auto --primary \
--output $screen2 --auto --right-of $screen1
elif [ "${!screen1}" -a -z "${!screen2}" ]; then
user_output "SETTING: $screen1 (Primary)." 1 "$notif_header_outputchange"
xrandr --output $screen0 --off \
--output $screen1 --auto --primary \
--output $screen2 --off
elif [ -z "${!screen1}" -a "${!screen2}" ]; then
user_output "SETTING: $screen2 (Primary)." 1 "$notif_header_outputchange"
xrandr --output $screen0 --off \
--output $screen1 --off \
--output $screen2 --auto --primary
else
user_output "No external monitors are plugged in." 1 "$notif_header_outputchange"
xrandr --output $screen0 --auto --primary \
--output $screen1 --off \
--output $screen2 --off
fi
}

## Configure monitors for open lid
## configure monitors for open lid
config_open_lid ()
{
echo "$prefix Laptop lid is open"
if [ -n "$HDMI1" -a -n "$VGA1" ]; then
echo "$prefix SETTING: LVDS1 (Left) - HDMI1 (Primary) - VGA1 (Right)"
xrandr --output LVDS1 --off \
--output HDMI1 --auto --primary \
--output VGA1 --auto --right-of HDMI1
elif [ -n "$HDMI1" -a -z "$VGA1" ]; then
echo "$prefix HDMI1 is plugged in, but not VGA1"
echo "$prefix SETTING: LVDS1 (Primary) - HDMI1 (Right)"
xrandr --output VGA1 --off \
--output LVDS1 --auto --primary \
--output HDMI1 --auto --right-of LVDS1 --noprimary
elif [ -z "$HDMI1" -a -n "$VGA1" ]; then
echo "$prefix SETTING: LVDS1 (Primary) - VGA1 (Right)"
xrandr --output HDMI1 --off \
--output LVDS1 --auto --primary \
--output VGA1 --auto --right-of LVDS1 --noprimary
else
echo "$prefix No external monitors are plugged in"
xrandr --output HDMI1 --off \
--output VGA1 --off \
--output LVDS1 --auto --primary
fi
user_output "Laptop lid is open."
if [ "${!screen1}" -a "${!screen2}" ]; then
user_output "$screen1 and $screen2 are plugged in."
user_output "SETTING: $screen1 (Primary) - $screen2 (Right)." 1 "$notif_header_outputchange"
xrandr --output $screen0 --off \
--output $screen1 --auto --primary \
--output $screen2 --auto --right-of $screen1
elif [ "${!screen1}" -a -z "${!screen2}" ]; then
# work mode: one big screen as main, laptop with smaller screen right of it
user_output "$screen1 is plugged in, but not $screen2. Work mode."
user_output "SETTING: $screen1 (Primary) - $screen0 (Right)." 1 "$notif_header_outputchange"
xrandr --output $screen1 --auto --primary \
--output $screen0 --auto --right-of $screen1 \
--output $screen2 --off
elif [ -z "${!screen1}" -a "${!screen2}" ]; then
# presentation mode: laptop main screen, presentation on external output
user_output "$screen2 is plugged in, but not $screen1. Presentation mode."
user_output "SETTING: $screen0 (Primary) - $screen2 (Right)." 1 "$notif_header_outputchange"
xrandr --output $screen0 --auto --primary \
--output $screen1 --off \
--output $screen2 --auto --right-of $screen0
else
user_output "No external monitors are plugged in." 1 "$notif_header_outputchange"
xrandr --output $screen0 --auto --primary \
--output $screen1 --off \
--output $screen2 --off
fi
}

# main configuration function
configure_displays ()
{

handle_err

declare_outputs

if [ -z "$lidstatus" -o "$lidstatus" == "closed" ]; then
config_closed_lid
elif [ "$lidstatus" == "open" ]; then
config_open_lid
fi

# Run .fehbg script if -f argument is given.
if [ "$fehbg" == "true" ]; then
if [ -x $HOME/.fehbg ]; then
echo "$prefix Setting background using .fehbg."
$($HOME/.fehbg 2>/dev/null)
else
echo ".$prefix Failed to execute ~/.fehbg script. Use 'feh --bg-xxx' to generate one."
fi
fi

# FIXME: Prevent segfault occurring from simultanious signals. -- Issue #5 --
handle_err

declare_outputs

if [ -z "$lidstatus" -o "$lidstatus" == "closed" ]; then
config_closed_lid
elif [ "$lidstatus" == "open" ]; then
config_open_lid
fi

# run .fehbg script if -f argument is given
if [ "$fehbg" == "true" ]; then
if [ -x $HOME/.fehbg ]; then
user_output "Setting background using .fehbg."
$($HOME/.fehbg 2>/dev/null)
else
user_output "Failed to execute ~/.fehbg script. Use 'feh --bg-xxx' to generate one."
fi
fi

# FIXME: prevent segfault occurring from simultanious signals -- Issue #5 --
sleep 2

}

#-----------#
# Begin #
# Begin #
#-----------#

# Set exit signal trap.
# set exit signal trap
trap "echo 'Received interrupt. Exiting...' ; exit" SIGHUP SIGINT SIGQUIT

# Log output.
#prefix='[ display-visor: ]:'
exec 1> >(logger -s -t "display-visor") 2>&1
# log output
prefix='[ display-visor: ]:'
#exec 1> >(logger -s -t "display-visor") 2>&1

# Handle arguments.
# handle arguments
handle_args "$@"

# Configure displays upon initialization.
# configure displays upon initialization
configure_displays

# Set reconfigure trap.
# set reconfigure trap
trap "echo 'Received signal. Reconfiguring displays.' ; configure_displays" RTMIN+5

# Wait for signals
# wait for signals
while :
do
sleep 60 &
wait
sleep 60 &
wait
done