#!/bin/sh
# displayset.sh [lcd|dualext]
#
# After issuing displayset.sh lcd:
# - The LCD panel is turned on and both external monitors are turned off
# - All windows are maximized and have no title bar, to maximize real estate
# - All non-dialog new windows will become maximized
#
# After issuing displayset.sh dualext:
# - The LCD panel is turned off and both external monitors are turned on
# - All windows are unmaximized
# - New windows will start normally, not maximized
#
# Window positions on the dual external monitors are not retained when switching
# to lcd and back to dualext.  Specifically, the windows all end up on the
# primary external display.
#
# Requires: xrandr (x11-xserver-utils), wmctrl, and maximus

# Change these settings according to the display configuration
LCD=LVDS1
LCD_MODE=1280x800
EXT1=HDMI1
EXT1_MODE=1600x1200
EXT1_POS=1600x0
EXT2=VGA1
EXT2_MODE=1600x1200
EXT2_POS=0x0

winlist()
{
  wmctrl -l | sed -e 's/^\(0x[0-9a-f]*\) .*$/\1/'
}

maximus_no_maximize()
{
  # Setting undecorate to true will cause the window manager to eventually
  # minimize all windows asynchronously, with little way for the script to know
  # when all of that is done to restore the windows with wmctrl -k off.  The
  # solution is to leave /apps/maximus/undecorate always set to true.
  gconftool -t bool -s /apps/maximus/no_maximize $1
}

current_maximize()
{
  for win in $(winlist); do
    wmctrl -i -r $win -b add,maximized_vert,maximized_horz
  done
}

current_unmaximize()
{
  for win in $(winlist); do
    wmctrl -i -r $win -b remove,maximized_vert,maximized_horz
  done
}

lcd()
{
  # Turn off one of the external monitors first so the LCD can come on.  The
  # graphics card will ony support two output devices at a time.
  xrandr --output $EXT1 --off
  xrandr --output $EXT1 --off --output $EXT2 --off --output DP1 --off \
	 --output $LCD --mode $LCD_MODE --pos 0x0 --rotate normal

  maximus_no_maximize false
  current_maximize
}

dualext()
{
  # Turn off the LCD before turning on the second external monitor.  The
  # graphics card will ony support two output devices at a time.
  xrandr --output $EXT1 --mode $EXT1_MODE --pos $EXT1_POS --rotate normal
  xrandr --output $LCD --off --output DP1 --off
  xrandr --output $EXT1 --mode $EXT1_MODE --pos $EXT1_POS --rotate normal \
	 --output $LCD --off --output DP1 --off \
	 --output $EXT2 --mode $EXT2_MODE --pos $EXT2_POS --rotate normal

  maximus_no_maximize true
  current_unmaximize
}

# MAIN

if [ "$1" = "lcd" ]; then
  lcd
elif [ "$1" = "dualext" ]; then
  dualext
else
  echo "usage: $0 [lcd|dualext]" >&2
  exit 1
fi