Created
September 28, 2020 14:47
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displayselect
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#!/bin/sh | |
# A UI for detecting and selecting all displays. | |
# Probes xrandr for connected displays and lets user select one to use. | |
# User may also select "manual selection" which opens arandr. | |
# I plan on adding a routine from multi-monitor setups later. | |
twoscreen() { # If multi-monitor is selected and there are two screens. | |
mirror=$(printf "no\\nyes" | dmenu -i -p "Mirror displays?") | |
# Mirror displays using native resolution of external display and a scaled | |
# version for the internal display | |
if [ "$mirror" = "yes" ]; then | |
external=$(echo "$screens" | dmenu -i -p "Optimize resolution for:") | |
internal=$(echo "$screens" | grep -v "$external") | |
res_external=$(xrandr --query | sed -n "/^$external/,/\+/p" | \ | |
tail -n 1 | awk '{print $1}') | |
res_internal=$(xrandr --query | sed -n "/^$internal/,/\+/p" | \ | |
tail -n 1 | awk '{print $1}') | |
res_ext_x=$(echo $res_external | sed 's/x.*//') | |
res_ext_y=$(echo $res_external | sed 's/.*x//') | |
res_int_x=$(echo $res_internal | sed 's/x.*//') | |
res_int_y=$(echo $res_internal | sed 's/.*x//') | |
scale_x=$(echo "$res_ext_x / $res_int_x" | bc -l) | |
scale_y=$(echo "$res_ext_y / $res_int_y" | bc -l) | |
xrandr --output "$external" --auto --scale 1.0x1.0 \ | |
--output "$internal" --auto --same-as "$external" \ | |
--scale "$scale_x"x"$scale_y" | |
else | |
primary=$(echo "$screens" | dmenu -i -p "Select primary display:") | |
secondary=$(echo "$screens" | grep -v "$primary") | |
direction=$(printf "left\\nright" | dmenu -i -p "What side of $primary should $secondary be on?") | |
xrandr --output "$primary" --auto --scale 1.0x1.0 --output "$secondary" --"$direction"-of "$primary" --auto --scale 1.0x1.0 | |
fi | |
} | |
morescreen() { # If multi-monitor is selected and there are more than two screens. | |
primary=$(echo "$screens" | dmenu -i -p "Select primary display:") | |
secondary=$(echo "$screens" | grep -v "$primary" | dmenu -i -p "Select secondary display:") | |
direction=$(printf "left\\nright" | dmenu -i -p "What side of $primary should $secondary be on?") | |
tertiary=$(echo "$screens" | grep -v "$primary" | grep -v "$secondary" | dmenu -i -p "Select third display:") | |
xrandr --output "$primary" --auto --output "$secondary" --"$direction"-of "$primary" --auto --output "$tertiary" --"$(printf "left\\nright" | grep -v "$direction")"-of "$primary" --auto | |
} | |
multimon() { # Multi-monitor handler. | |
case "$(echo "$screens" | wc -l)" in | |
1) xrandr $(echo "$allposs" | grep -v "$screens" | awk '{print "--output", $1, "--off"}' | tr '\n' ' ') ;; | |
2) twoscreen ;; | |
*) morescreen ;; | |
esac ;} | |
# Get all possible displays | |
allposs=$(xrandr -q | grep "connected") | |
# Get all connected screens. | |
screens=$(echo "$allposs" | grep " connected" | awk '{print $1}') | |
# Get user choice including multi-monitor and manual selection: | |
chosen=$(printf "%s\\nmulti-monitor\\nmanual selection" "$screens" | dmenu -i -p "Select display arangement:") && | |
case "$chosen" in | |
"manual selection") arandr ; exit ;; | |
"multi-monitor") multimon ;; | |
*) xrandr --output "$chosen" --auto --scale 1.0x1.0 $(echo "$allposs" | grep -v "$chosen" | awk '{print "--output", $1, "--off"}' | tr '\n' ' ') ;; | |
esac | |
#setbg # Fix background if screen size/arangement has changed. | |
#remaps # Re-remap keys if keyboard added (for laptop bases) | |
pgrep -x dunst >/dev/null && killall dunst && setsid dunst & # Restart dunst to ensure proper location on screen |
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