#!/bin/sh
# Starts Compiz Decorator depending on the DE
#
# Copyright (c) 2007 CyberOrg <cyberorg@cyberorg.info>
# Based on compiz-manager script by Kristian Lyngstøl <kristian@bohemians.org>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#
# Contributions by: crdlb
# Modifications by: Daniel van Vugt <daniel.van.vugt@canonical.com>
# Additional Changes by: BryanFRitt

# Default to gtk-window-decorator or kde4-window-decorator
USE_EMERALD="no"
DECORATOR=""
# Set to yes to enable verbose
VERBOSE="yes"

# Set COMPIZ_BIN_PATH if need be
if [ -z "${COMPIZ_BIN_PATH}" ]; then
	#COMPIZ_BIN_PATH="/usr/bin/"
	# ?set default to the bin path is in the same path as this file, or to do above?
	COMPIZ_BIN_PATH=$(cd $(dirname "$0"); pwd)
	#echo "${COMPIZ_BIN_PATH}"
fi

# Echos the arguments if verbose
verbose()
{
	if [ "${VERBOSE}" = "yes" ]; then
		echo "$@"
	fi
}

# Read configuration from XDG paths
if [ -z "${XDG_CONFIG_DIRS}" ]; then
	test -f "/etc/xdg/compiz/compiz-manager" && . "/etc/xdg/compiz/compiz-manager"
else
	test -f "${XDG_CONFIG_DIRS}/compiz/compiz-manager" && . "${XDG_CONFIG_DIRS}/compiz/compiz-manager"
fi

if [ -z "${XDG_CONFIG_HOME}" ]; then
	test -f "${HOME}/.config/compiz/compiz-manager" && . "${HOME}/.config/compiz/compiz-manager"
else
	test -f "${XDG_CONFIG_HOME}/compiz/compiz-manager" && . "${XDG_CONFIG_HOME}/compiz/compiz-manager"
fi

# Pick a decorator
if [ -x "${COMPIZ_BIN_PATH}/emerald" ] && [ "{$USE_EMERALD}" = "yes" ]; then
	DECORATOR="emerald"
elif [ -x "${COMPIZ_BIN_PATH}/gtk-window-decorator" ] && [ -n "${GNOME_DESKTOP_SESSION_ID}" ]; then
	DECORATOR="gtk-window-decorator"
elif [ -x "${COMPIZ_BIN_PATH}/kde4-window-decorator" ] && [ "${KDE_SESSION_VERSION}" = "4" ]; then
	DECORATOR="kde4-window-decorator"
fi

# If a decorator wasn't picked out, fall back to 1st decorator found
if [ -z "${DECORATOR}" ]; then
	verbose "Couldn't find a perfect decorator match; using 1st decorator found"
	if [ -x "${COMPIZ_BIN_PATH}/emerald" ]; then
		DECORATOR="emerald"
	elif [ -x "${COMPIZ_BIN_PATH}/gtk-window-decorator" ]; then
		DECORATOR="gtk-window-decorator"
	elif [ -x "${COMPIZ_BIN_PATH}/kde4-window-decorator" ]; then
		DECORATOR="kde4-window-decorator"
	fi
fi

# Start a decorator
if [ -n "${DECORATOR}" ]; then
	verbose "Starting ${DECORATOR}"
	exec "${COMPIZ_BIN_PATH}/${DECORATOR}" "$@" "--replace" &
else
	# If there isn't a compiz decorator available, try not leave users without decoration
	if [ "${DESKTOP_SESSION}" = "kde-plasma" ]; then
		FALLBACKWM=`which kwin` # typically "/usr/bin/kwin"
	else
		FALLBACKWM=`which metacity` # typically "/usr/bin/metacity"
	fi
	FALLBACKWM_OPTIONS="--replace"
	verbose "Couldn't find a decorator to start, running fallback"
	verbose "exec ${FALLBACKWM} ${FALLBACKWM_OPTIONS} &"
	exec "${FALLBACKWM}" "${FALLBACKWM_OPTIONS}" &
fi