Grid window placement in KDE, Plasma. To use create appropriate keyboard shortcuts to KDE and enjoy quick window placement. Originally created by Anpu and posted on KDE forum https://forum.kde.org/viewtopic.php?f=111&t=108024

kdegrid.sh

#!/bin/bash

# number of monitors 
MONITORS=`xrandr | grep -w connected | wc -l`

# make a gap because of top panel
GAP_TOP=0
GAP_BOTTOM=15

#find x position of active window
GET_X_POS=`xdpyinfo | grep focus | grep -E -o 0x[0-9a-f]+`
X_POS=`xwininfo -id $GET_X_POS | grep -w "Absolute upper-left X:" | awk '{print $4}'`


if [ "$MONITORS" -eq "2" ]; then
  #monitor 1 X size and Y size
  X_RES1=`xrandr | grep "*+" | awk '{print $1}' | cut -d'x' -f 1 | sed -n 1p`
  Y_RES1=`xrandr | grep "*+" | awk '{print $1}' | cut -d'x' -f 2 | sed -n 1p`

  #monitor 2 X size and Y size
  X_RES2=`xrandr | grep "*+" | awk '{print $1}' | cut -d'x' -f 1 | sed -n 2p`
  Y_RES2=`xrandr | grep "*+" | awk '{print $1}' | cut -d'x' -f 2 | sed -n 2p`

  #desktop width
  WIDTH=$((X_RES1+X_RES2))
  
#   if [ "$Y_RES1" -ge "$Y_RES2" ]; then
#     HEIGHT=$Y_RES1
#   else
#     HEIGHT=$Y_RES2
#   fi
else
  X_RES=`xrandr | grep "*+" | awk '{print $1}' | cut -d'x' -f 1 | sed -n 1p`
  Y_RES=`xrandr | grep "*+" | awk '{print $1}' | cut -d'x' -f 2 | sed -n 1p`
  
  #desktop width
  WIDTH=$X_RES
  
  #desktop height
  HEIGHT=$Y_RES
fi

#get the desktop parameters
HEIGHT=`xwininfo -root | grep 'Height:' | awk '{print $2}'`
WIDTH=`xwininfo -root | grep 'Width:' | awk '{print $2}'`

#see what the user wants to do
case $1 in 
  "-l")
    MODE="LEFT"
    ;;        
  "-r")
    MODE="RIGHT"
    ;;        
  "-ll")
    MODE="BIGLEFT"
    ;;        
  "-rr")
    MODE="BIGRIGHT"
    ;;        
  "-t")
    MODE="TOP"
    ;;        
  "-b")
    MODE="BOTTOM"
    ;;        
  "-y")
    MODE="TOP_LEFT"
    ;;        
  "-i")
    MODE="TOP_RIGHT"
    ;;
  "-n")
    MODE="BOTTOM_LEFT"
    ;;    
  "-m")
    MODE="BOTTOM_RIGHT"
    ;;        
  "-c")
    MODE="CENTER"
    ;;    
  *)  
    MODE="LEFT"
    ;;
esac

case $MODE in
  "LEFT")
    if [ "$MONITORS"  == "2" ]; then
      # left monitor
      if [ "$X_POS" -lt "$X_RES1" ]; then
        X=$(($X_RES1/2))
        Y=$(($Y_RES1-$GAP_BOTTOM-$GAP_TOP))
        wmctrl -r :ACTIVE: -e "1,0,$GAP_TOP,$X,$Y"
      #right monitor
      else 
        X=$(($X_RES2/2))
        Y=$(($Y_RES2-$GAP_BOTTOM-$GAP_TOP))
        wmctrl -r :ACTIVE: -e "1,$X_RES1,$GAP_TOP,$X,$Y"
      fi
    else
      X=$(($WIDTH/2))
      Y=$(($HEIGHT-$GAP_BOTTOM-$GAP_TOP))
      wmctrl -r :ACTIVE: -e "1,0,$GAP_TOP,$X,$Y"
    fi
    ;;
  "BIGLEFT")
    if [ "$MONITORS"  == "2" ]; then
      # left monitor
      if [ "$X_POS" -lt "$X_RES1" ]; then
        #X=$(($X_RES1/2))
        X=$((($X_RES1/3)*2))
        Y=$(($Y_RES1-$GAP_BOTTOM-$GAP_TOP))
        wmctrl -r :ACTIVE: -e "1,0,$GAP_TOP,$X,$Y"
      #right monitor
      else 
        #X=$(($X_RES2/2))
        X=$((($X_RES2/3)*2))
        Y=$(($Y_RES2-$GAP_BOTTOM-$GAP_TOP))
        wmctrl -r :ACTIVE: -e "1,$X_RES1,$GAP_TOP,$X,$Y"
      fi
    else
      X=$((($WIDTH/3)*2))
      Y=$(($HEIGHT-$GAP_BOTTOM-$GAP_TOP))
      wmctrl -r :ACTIVE: -e "1,0,$GAP_TOP,$X,$Y"
    fi
    ;;
  "RIGHT")
    if [ "$MONITORS"  == "2" ]; then
      # left monitor
      if [ "$X_POS" -lt "$X_RES1" ]; then
        X=$(($X_RES1/2))
        Y=$(($Y_RES1-$GAP_BOTTOM-$GAP_TOP))
        wmctrl -r :ACTIVE: -e "1,$X,$GAP_TOP,$X,$Y"
        #right monitor
      else 
        X=$(($X_RES2/2))
        Y=$(($Y_RES2-$GAP_BOTTOM-$GAP_TOP))
        wmctrl -r :ACTIVE: -e "1,$(($X+$X_RES1)),$GAP_TOP,$X,$Y"
      fi
    else
      X=$(($WIDTH/2))
      Y=$(($HEIGHT-$GAP_BOTTOM-$GAP_TOP))
      wmctrl -r :ACTIVE: -e "1,$X,$GAP_TOP,$X,$Y"
    fi
    ;;
  "BIGRIGHT")
    if [ "$MONITORS"  == "2" ]; then
      # left monitor
      if [ "$X_POS" -lt "$X_RES1" ]; then
        X=$(($X_RES1/3))
        XX=$((($X_RES1/3)*2))
        Y=$(($Y_RES1-$GAP_BOTTOM-$GAP_TOP))
        wmctrl -r :ACTIVE: -e "1,$X,$GAP_TOP,$XX,$Y"
        #right monitor
        #echo "wmctrl -r :ACTIVE: -e 1,$X,$GAP_TOP,$XX,$Y"
      else 
        X=$(($X_RES2/3))
        XX=$((($X_RES2/3)*2))
        Y=$(($Y_RES2-$GAP_BOTTOM-$GAP_TOP))
        wmctrl -r :ACTIVE: -e "1,$(($X+$X_RES1)),$GAP_TOP,$XX,$Y"
        #echo "wmctrl -r :ACTIVE: -e 1,$(($X+$X_RES1)),$GAP_TOP,$XX,$Y"
      fi
    else
      X=$(($WIDTH/3))
      XX=$((($WIDTH/3)*2))
      Y=$(($HEIGHT-$GAP_BOTTOM-$GAP_TOP))
      wmctrl -r :ACTIVE: -e "1,$X,$GAP_TOP,$XX,$Y"
      #echo "wmctrl -r :ACTIVE: -e 1,$X,$GAP_TOP,$XX,$Y"
    fi
    ;;
  "TOP")
    if [ "$MONITORS"  == "2" ]; then
      # left monitor
      if [ "$X_POS" -lt "$X_RES1" ]; then
        X=$X_RES1
        Y=$(($Y_RES1/2))
        wmctrl -r :ACTIVE: -e "1,0,$GAP_TOP,$X,$(($Y-$GAP_BOTTOM-$GAP_TOP))"
        #right monitor
      else 
        X=$X_RES2
        Y=$(($Y_RES2/2))
        wmctrl -r :ACTIVE: -e "1,$X,$GAP_TOP,$X,$Y"
      fi
    else
      X=$WIDTH
      Y=$(($HEIGHT/2-$GAP_BOTTOM-$GAP_TOP))
      wmctrl -r :ACTIVE: -e "1,0,$GAP_TOP,$X,$Y"
    fi
    ;;
  "BOTTOM")
    if [ "$MONITORS"  == "2" ]; then
      # left monitor
      if [ "$X_POS" -lt "$X_RES1" ]; then
        X=$X_RES1
        Y=$(($Y_RES1/2))
        wmctrl -r :ACTIVE: -e "1,0,$(($Y-$GAP_TOP)),$X,$(($Y-$GAP_BOTTOM))"
        #right monitor
      else 
        X=$X_RES2
        Y=$(($Y_RES2/2))
        wmctrl -r :ACTIVE: -e "1,$X,$Y,$X,$(($Y-$GAP_BOTTOM))"
      fi
    else
      X=$WIDTH
      Y=$(($HEIGHT/2))
      wmctrl -r :ACTIVE: -e "1,0,$Y,$X,$(($Y-$GAP_BOTTOM))"
    fi
    ;;
  "TOP_LEFT")
    if [ "$MONITORS"  == "2" ]; then
      # left monitor
      if [ "$X_POS" -lt "$X_RES1" ]; then
        X=$(($X_RES1/2))
        Y=$(($Y_RES1/2))
        wmctrl -r :ACTIVE: -e "1,0,$GAP_TOP,$X,$Y"
        #right monitor
      else 
        X=$X_RES1
        Y=$(($Y_RES2/2))
        wmctrl -r :ACTIVE: -e "1,$X,$GAP_BOTTOM,$(($X_RES2/2)),$Y"
      fi
    else
      X=$(($WIDTH/2))
      Y=$(($HEIGHT/2))
      wmctrl -r :ACTIVE: -e "1,0,$GAP_TOP,$X,$Y"
    fi
    ;;
  "TOP_RIGHT")
    if [ "$MONITORS"  == "2" ]; then
      # left monitor
      if [ "$X_POS" -lt "$X_RES1" ]; then
        X=$(($X_RES1/2))
        Y=$(($Y_RES1/2))
        wmctrl -r :ACTIVE: -e "1,$X,$GAP_TOP,$X,$Y"
      #right monitor
      else 
        X=$X_RES1
        Y=$(($Y_RES2/2))
        wmctrl -r :ACTIVE: -e "1,$(($X+($X_RES2/2))),$GAP_TOP,$(($X_RES2/2)),$Y"
      fi
    else
      X=$((2))
      Y=$(($HEIGHT/2))
      wmctrl -r :ACTIVE: -e "1,$X,$GAP_TOP,$X,$Y"
    fi
    ;;
  "BOTTOM_LEFT")
    if [ "$MONITORS"  == "2" ]; then
      # left monitor
      if [ "$X_POS" -lt "$X_RES1" ]; then
        X=$(($X_RES1/2))
        Y=$(($Y_RES1/2))
        wmctrl -r :ACTIVE: -e "1,0,$(($Y-$GAP_BOTTOM-$GAP_TOP)),$X,$Y"
      #right monitor
      else 
        X=$X_RES1
        Y=$(($Y_RES2/2))
        wmctrl -r :ACTIVE: -e "1,$X,$(($Y-$GAP_BOTTOM-$GAP_TOP)),$(($X_RES2/2)),$Y"
      fi
    else
      X=$(($WIDTH/2))
      Y=$(($HEIGHT/2))
      wmctrl -r :ACTIVE: -e "1,0,$(($Y-$GAP_BOTTOM)),$X,$Y"
    fi
    ;;
  "BOTTOM_RIGHT")
    if [ "$MONITORS"  == "2" ]; then
      # left monitor
      if [ "$X_POS" -lt "$X_RES1" ]; then
        X=$(($X_RES1/2))
        Y=$(($Y_RES1/2))
        wmctrl -r :ACTIVE: -e "1,$X,$(($Y-$GAP_BOTTOM-$GAP_TOP)),$X,$Y"
      #right monitor
      else 
        X=$(($X_RES1+($X_RES2/2)))
        Y=$(($Y_RES2/2))
        wmctrl -r :ACTIVE: -e "1,$X,$(($Y-$GAP_BOTTOM-$GAP_TOP)),$(($X_RES2/2)),$Y"
      fi
    else
      X=$(($WIDTH/2))
      Y=$(($HEIGHT/2))
      wmctrl -r :ACTIVE: -e "1,$X,$(($Y-$GAP_BOTTOM)),$X,$Y"
    fi
    ;;
  "CENTER")
    if [ "$MONITORS"  == "2" ]; then
      # left monitor
      if [ "$X_POS" -lt "$X_RES1" ]; then
        X=$X_RES1
        Y=$Y_RES1
        wmctrl -r :ACTIVE: -e "1,0,$GAP_TOP,$X,$(($Y-$GAP_BOTTOM-$GAP_TOP))"
      #right monitor
      else 
        X=$X_RES1
        Y=$Y_RES2
        wmctrl -r :ACTIVE: -e "1,$X,$GAP_TOP,$X_RES2,$(($Y-$GAP_BOTTOM-$GAP_TOP))"
      fi
    else
      X=$WIDTH
      Y=$(($HEIGHT-$GAP_BOTTOM-$GAP_TOP))
      wmctrl -r :ACTIVE: -e "1,0,$GAP_TOP,$X,$Y"
    fi
    ;;
esac