monitor.sh

   1 #!/bin/bash
   2
   3 command -v xrandr &>/dev/null ||
   4     (echo "please install xrandr" && exit 1)
   5 cd
   6
   7 mkdir -p ~/instantos/monitor &>/dev/null
   8 cd ~/instantos/monitor
   9
  10 xrandr | grep '[^s]connected' | grep -o '[0-9]*x[0-9]*+[0-9]*' | grep -o '[0-9]*$' >positions.txt
  11 AMOUNT=$(cat positions.txt | wc -l)
  12
  13 # get monitor with highest resolution
  14 RESOLUTIONS=$(xrandr | grep '[^s]connected' | grep -Eo '[0-9]{1,}x[0-9]{1,}\+[0-9]{1,}\+[0-9]{1,}' |
  15     grep -o '[0-9]*x[0-9]*' | sed 's/ /\n/g')
  16 OLDRES=$(cat resolutions.txt)
  17
  18 # see if resolution has changed
  19 if ! [ "$RESOLUTIONS" = "$OLDRES" ]; then
  20     echo "$RESOLUTIONS" >resolutions.txt
  21     sed -i 's/ /\n/g' resolutions.txt
  22     CHANGERES="True"
  23     echo "Resolution change detected"
  24 fi
  25
  26 if [ $(cat resolutions.txt | sort -u | wc -l) = "1" ]; then
  27     echo "resolutions identical"
  28     head -1 resolutions.txt >max.txt
  29 else
  30     let PIXELS1="$(head -1 resolutions.txt | grep -o '^[0-9]*') * $(cat resolutions.txt | head -1 | grep -o '[0-9]*$')"
  31     let PIXELS2="$(tail -1 resolutions.txt | grep -o '^[0-9]*') * $(cat resolutions.txt | head -1 | grep -o '[0-9]*$')"
  32     if [ "$PIXELS1" -gt "$PIXELS2" ]; then
  33         head -1 resolutions.txt >max.txt
  34     else
  35         tail -1 resolutions.txt >max.txt
  36     fi
  37 fi
  38
  39 # rebuild wallpaper after resolution change
  40 changetrigger() {
  41     if [ -z "$CHANGERES" ]; then
  42         echo "no resolution change"
  43     else
  44         if [ -e ~/instantos/wallpapers ] && command -v instantwallpaper; then
  45             rm -rf ~/instantos/wallpapers
  46             instantwallpaper random
  47         fi
  48     fi
  49 }
  50
  51 if [ "$AMOUNT" = "1" ]; then
  52     echo "only one monitor found, further setup not needed"
  53     changetrigger
  54     exit
  55 else
  56     if [ "$AMOUNT" -gt 2 ]; then
  57         echo "only 2 monitors are supported"
  58         exit
  59     fi
  60     echo "$AMOUNT monitors found"
  61 fi
  62
  63 xrandr | grep '[^s]connected' | grep -o '^[^ ]*' >names.txt
  64 MONITOR1=$(head -1 positions.txt)
  65 MONITOR2=$(tail -1 positions.txt)
  66
  67 if [ "$MONITOR1" -gt "$MONITOR2" ]; then
  68     echo "Monitor 1 is ${MONITOR1}px on the right"
  69     echo "$MONITOR1" >right.txt
  70 else
  71     echo "Monitor 2 is ${MONITOR2}px on the right"
  72     echo "$MONITOR1" >right.txt
  73 fi
  74 changetrigger