#! /bin/sh # All credits to Luke Smith (lukesmith.xyz) # 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. 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. pgrep -x dunst >/dev/null && killall dunst && setsid dunst & # Restart dunst to ensure proper location on screen