#!/bin/sh

 # kanotix-start-copmpiz 20140329
 # Start compiz via fusion-icon

[ "$(id -u)" = "0" ] && exit 2        # do not run as root
! [ -x /usr/bin/lxde-logout ] && exit 3 # only start in lxde

# This is the legacy window-manager for lxde
WM="openbox-lxde"

if [ -e ~/.nocompiz ]; then
 # write openbox-config and start openbox
 # keep care we have this config in case fusion-icon is started from
 # menu later with the -n option
mkdir -p ~/.config/compiz/
echo "compiz start disabled per user setting" >&2
cat <<"_EOF_" > ~/.config/compiz/fusion-icon
[compiz options]
loose binding = false
indirect rendering = false

[window manager]
active wm = openbox


_EOF_

if [ -e ~/.compton ]; then
echo "starting compton" >&2
compton -b
fi
"$WM" --replace &
exit 0
fi

# check for compiz otherwise start openbox-lxde
if ! [ -x /usr/bin/fusion-icon ]; then
"$WM" --replace &
exit 0
fi

if ! [ -x /usr/bin/compiz ]; then
"$WM" --replace &
exit 0
fi

# startup with compiz and fusion-icon
if ! [ -e ~/.config/compiz/fusion-icon ]; then
 # write default config for fusion-icon, this is default, also
 # this can go to etcskel, but better keep here
cat <<"_EOF_" > ~/.config/compiz/fusion-icon
[compiz options]
loose binding = false
indirect rendering = false

[window manager]
active wm = compiz


_EOF_
fi
STARTFLAG=""

# force no compiz start with llvmpipe
if glxinfo|grep -q llvmpipe; then
echo "disable compiz on llvmpipe" >&2
sed -i s/"active wm = compiz"/"active wm = openbox"/ ~/.config/compiz/fusion-icon
STARTFLAG="-v"
fi

# if on virt start with  openbox
if command -v systemd-detect-virt > /dev/null ;then
    VIRT=$(systemd-detect-virt)
    if ! [ "$VIRT" = "none" ]; then
    echo "disable compiz on virtual machine" >&2
    sed -i s/"active wm = compiz"/"active wm = openbox"/ ~/.config/compiz/fusion-icon
    STARTFLAG="-v"
    fi
fi

# catch if system is already running
if ps ax |grep -q [f]usion-icon; then
 echo "ERROR fusion-icon already running, this should not happen, killing" >&2
 pkill -9 fusion-icon
 fusion-icon $STARTFLAG >/dev/null 2>&1 &
 exit 0
fi

# start compiz/openbox choosen from config
if grep "openbox" ~/.config/compiz/fusion-icon; then
STARTFLAG="-v"
fi
if glxinfo|grep -q GLX_EXT_texture_from_pixmap; then
if [ -x /usr/bin/fusion-icon ]; then
 echo "starte fusion-icon"
 #if grep "wm = compiz" ~/.config/compiz/fusion-icon; then
 #compiz --replace &
 #fi

 #fusion-icon -n >/dev/null 2>&1 &     # start and do not reload windowmanager
 fusion-icon -v >/dev/null 2>&1 &     # start in verbose mode

else
 if [ -e ~/.compiz ]; then
  sleep 3
  # test to play around with sleep values
  emerald --replace &
  compiz --replace & >/dev/null
  #sleep 1
  lxpanelctl restart
 fi
 echo "Start without fusion-icon" >&2
 "$WM" --replace &
fi
else
 echo "Error no hardware support to start compiz" >&2
 "$WM" --replace &
fi