#!/bin/bash
#
# choose_cursor
# (c) Buchan Milne <bgmilne@linux-mandrake.com> 2003 
# License: GPLv2
# 
# choose_cursor is a simple script to allow users to choose from the mouse
# cursor themes installed on their system (/usr/share/icons/*/cursors) or in
# their home directory ($HOME/.icons/*/cursor).
# At present it does not deal with icons in /usr/share/icons/default or
# $HOME/.icons/default/
#
# Changelog
# v0.0.5 - 20040419
#  - Fix support for zenity's gdialog (really better fix for chatty kdialog)
#  - Prevent themes ever getting version numbers
#  - Ensure we really get user icons
# v0.0.4 - 20030826
#  - Fixes for chatty kdialog (don't redirect stderr to stdout), but don't
#    break cdialog support (outputs choice to stderr)
#  - Tell the user if we don't have a usable dialog program
#  - Don't use gdialog in console (zenity gdialog doesn't work in console)
#  - Adjust dialog sizes to fit for cdialog
#
# v0.0.3 - 20030716
#  - Cleanups
#  - Fix not selecting cursor theme every 2nd time if index.theme didn't exist
#    when we started
#
# v0.0.2 - 20030406
#  - Use gdialog/kdialog if avialable
#  - Allow user to "preview" (if the dialog shows the new cursor) before
#    "applying"
#  - Offer to restart WM to apply themes to the WM
#    Contributions from many cookers
#    KDE, Windowmaker should work since one can find if they are running easily
#    For GNOME, we currently assume metacity is running :-(
#  - Use mktemp for index backup file
#  - Suggest preview with other app when not using kdialog
#  - Quote and queit which again (Duncan)
# v0.0.1 - 20030329
#  - First version used gmessage (gchooser isn't consistent :-()
#  - We now use Xdialog, because we have too many themes to fit a gmessage
#    on a reasonable size screen

ICONS=/usr/share/icons
USERICONS=~/.icons
INDEXFILE=default/index.theme

TMPFILE=""

c=("" core `find $ICONS $USERICONS -type d -name 'cursors' |sed 's,.*/\(.*\)/cursors,\1,g' |grep -v default|sort 2>/dev/null`)

MENU=`for ((i=1;i<=$[${#c[*]}-2];i=$i+1));do echo -n "$i ${c[i]} ";done``echo -n "$[${#c[*]}-1] ${c[$[${#c[*]}-1]]}"`
MESSAGE="Please choose a cursor theme:"

# Find a dialog program we can use, either kdialog or gdialog
# if we are running in console, gdialog or dialog
if [ -n "$DISPLAY" ]
then
	# Use desktop dialog programs if available
	[ -x "`which kdialog 2>&-`" -a "$DESKTOP" == "kde" ] && DIALOG="kdialog"
	[ -x "`which gdialog 2>&-`" -a -n "$GNOME_DESKTOP_SESSION_ID" ] && DIALOG="gdialog"
	# Fall back to gdialog, kdialog or Xdialog if they exist
	[ -z "$DIALOG" -a -x "`which gdialog 2>&-`" ] && DIALOG="gdialog"
	[ -z "$DIALOG" -a -x "`which kdialog 2>&-`" ] && DIALOG="kdialog"
	[ -z "$DIALOG" -a -x "`which Xdialog 2>&-`" ] && DIALOG="Xdialog --wrap"
else
	# If we don't have a display variable, use dialog
	[ -z "$DIALOG" -a -x "`which  dialog 2>&-`" ] && DIALOG="dialog"
fi

if [ -z "$DIALOG" ]
then
	ERROR="Please install a dialog program, either kdialog (kdebase)
or gdialog (gnome-utils or zenity), or cdialog for the console, 
to use this program"
	#First try and tell the user there is no dialog
	if [ -x "`which gmessage 2>&-`" -a -n "$DISPLAY" ]
	then
		gmessage "$ERROR" 
	else
		echo "$ERROR"
	fi
	exit 2
fi
	
if [ "$DIALOG" == "kdialog" ]
then
	DLGOPT=""
	DLGMOPT=""
else
	#Set options for gdialog and cdialog
	DLGOPT="9 42"
	# Height (1) must be list height (3) + 6
	DLGMOPT="14 42 8"
fi

# Root sets the global cursor
if [ `id -u` -eq 0 ]
then
	INDEX=$ICONS/$INDEXFILE
else
	INDEX=$USERICONS/$INDEXFILE
	[ ! -d $USERICONS/default ] &&mkdir -p $USERICONS/default
	[ ! -e $INDEX ] && touch $INDEX
fi
	
# Create a temporary file to backup the index file:
BINDEX=`mktemp -q $INDEX.XXXXXX`
if [ $? -ne 0 ]
then
	echo "$0: Can't create temp file, exiting...	"
	exit 1
fi
									       
cp -f $INDEX $BINDEX 2>/dev/null
UNCONFIRMED=1
while [ $UNCONFIRMED -ne 0 ];do
	TITLE="Mouse Cursor Theme Selector"
	# console dialog gives choice on stderr, while kdialog gives noise
	if [ "$DIALOG" != "kdialog" ]
	then
		THEME=${c[`$DIALOG --title "$TITLE" --menu "$MESSAGE" $DLGMOPT $MENU 2>&1`]}
	else
		THEME=${c[`$DIALOG --title "$TITLE" --menu "$MESSAGE" $DLGMOPT $MENU 2>/dev/null`]}
	fi	
	if [ $? -eq 0 ]
	then
		grep -q "\[Icon Theme\]" $BINDEX 2>/dev/null
		if [ $? -eq 0 ]
		then
			cat $BINDEX |sed -e "s/^Inherits=.*$/Inherits=$THEME/g" >$INDEX
		else
			echo "[Icon Theme]" > $INDEX
			echo "Inherits=$THEME" >> $INDEX
		fi

		# Make a dialog so the user can see the new icon and decide if
		# they want to keep it.
		TITLE="Cursor Preview"
QUESTION="Do you want to keep this theme?"
[ "$DIALOG" == "kdialog" ]|| QUESTION="   $QUESTION

   (you may need to start another 
application now to preview the theme)"
		$DIALOG --title "$TITLE" --yesno "$QUESTION" $DLGOPT
		UNCONFIRMED=$?
	else
		if [ $UNCONFIRMED -ne 0 ]
		then
			#echo "restoring index"
			mv -f $BINDEX $INDEX
		fi
		exit 1
	fi
done

# After setting the cursor, we may want to restart the WM so it gets the 
# icons too:

QUESTION="Do you want to restart your window 
 manager to use the new cursors?

  Note: other running applications 
    will still use the old cursors"
TITLE="Apply changes now?"
$DIALOG --title "$TITLE" --yesno "$QUESTION" $DLGOPT

if [ $? -eq 0 ]
then
	# wmaker: "killall -USR1 wmaker"
	[ -n "$WMAKER_BIN_NAME" ] && killall -USR1 wmaker
	# metacity: "metacity --replace"
	[ -n "$GNOME_DESKTOP_SESSION_ID" ] && metacity --replace &
	# sawfish: sawfish-client --display $DISPLAY -f "(restart)"
	# icewm: killall -HUP icewm

	#kde
	if [ "$DESKTOP" == "kde" ];then
		#echo "restarting kwin"
		dcop kwin MainApplication-Interface quit;kstart kwin & >/dev/null 2>&1
		#echo "restarting kicker"
		dcop kicker kicker restart & >/dev/null 2>&1
		#echo "restarting kdesktop"
		#kdekillall kdesktop only works once!
		kdekillall kdesktop >/dev/null 2>&1 ||killall kdesktop >/dev/null 2>&1
		kstart kdesktop & >/dev/null 2>&1
	fi
fi

# Clean up our temp file:
[ -e $BINDEX ] && rm -f $BINDEX 2>/dev/null