three_windows.sh

#!/bin/bash

list_windows()
{
  # get list of all currently open windows
  qdbus org.ayatana.bamf  \
       /org/ayatana/bamf/matcher \
       org.ayatana.bamf.matcher.WindowPaths
}

check_window_type()
{
  # list only app windows, ignore unity panel or launcher
  qdbus org.ayatana.bamf "$1" \
        org.ayatana.bamf.window.WindowType
}

get_screen_geometry()
{
   # determine size of the desktop
   xwininfo -root | \
   awk -F ':' '/Width/{printf "%d",$2/3}/Height/{print $2}' 
}

get_window_title()
{
     qdbus org.ayatana.bamf "$1" org.ayatana.bamf.view.Name
}

make_gui_dialog()
{
    # provide colum titles first, supply entries next
    # --print-column=1 is default so not used here
    zenity --list --checklist --multiple --separator=" " \
           --text "More than 3 windows open. Please select 3 to arrange" \
           --column "Pick" --column "Window ID" \
           --column "Window Titles"  "$@"
}

# 1. filter out app window
# 2. extract extract it's ID
# 3. get it's title
# present everything in gui dialog
for window in $(list_windows)
do
    if [ $(check_window_type $window ) -eq 0    ]; then
        entries+=( FALSE )
        entries+=( "${window##*/}"  )
        entries+=( "$(get_window_title $window)"   )
    fi
done

# This script must work with 3 windows. Per each window
# we must have FALSE and ID string there. That means
# we must have at least 3*3=9 entries in that array to make it work

if [ ${#entries[@]}  -lt 9 ] ;
then
      echo "less than 9"
      exit
fi


user_selections=( $(make_gui_dialog "${entries[@]}") )

# same idea here
# We must make sure the user selects at least 
# 3 windows to work with
if [ ${#user_selections[@]}  -ne 3 ];
then
     echo "must select 3 windows to arrange"
     exit
fi


# ${SCREEN[0]} is 1/3 of width and ${SCREEN[1]} is height
SCREEN=( $(get_screen_geometry) )


# get x placement of the top left corner for each window
#for i in $(seq 0 2)
#do
#   X_POS=( $(( ${SCREEN[0]}*$i   )) )
#done

sleep 0.25
# resize each window to 1/3 of width
COUNTER=0
for window in ${user_selections[@]}
do
   echo $((${SCREEN[0]}*$COUNTER))
   xdotool windowsize  ${window} ${SCREEN[0]}   $(( ${SCREEN[1]} - 20 ))
   xdotool windowmove  ${window} $((${SCREEN[0]}*$COUNTER)) 0
   COUNTER=$(($COUNTER+1))
   sleep 0.25
done