#!/bin/bash
# name :  save-session
# author : Matt Keenan (matt.keenan@sun.com)
# Date : Oct 2008
#
# save-session is used in conjunction with restore-session, it is used to 
# generate $HOME/.config/restore-session.conf file, which should be viewed
# and edited after generation to confirm accuracy.
#
# It uses wnckprop to determine workspace and geometry information.
#
# The format of restore-session.conf is :
#
# <App Name> <Workspace (starting at 0)> <X-CoOrd> <Y-CoOrd>
#
# NOTE : If running compiz window manager, workspace location of windows
# is determined based on the X Co-ordinate. To ensure this is correct
# Ths script must be run from the first Viewport(worksace).
# For metacity this does not matter, as wnckprop will report the correct
# workspace.

function panel_or_nautilus() {
    wnckprop --window=$win_id | grep "Bottom Expanded Edge Panel" > /dev/null
    if [ $? -eq 0 ]; then
        echo "1"
    else
        wnckprop --window=$win_id | grep "x-nautilus-desktop" > /dev/null
        if [ $? -eq 0 ]; then
            echo "1"
        else
            echo "0"
        fi
    fi
}

# Saved Session Data file
SAVED_SESSION=$HOME/.config/restore-session.conf

if [ -s $SAVED_SESSION ]; then
    echo "Backing up previous $SAVED_SESSION file to $SAVED_SESSION.old.`date '+%d-%m-%y--%H:%M:%S'`"
    mv $SAVED_SESSION $SAVED_SESSION.old.`date '+%d-%m-%y--%H:%M:%S'`
fi

echo "#NAME	WORKSPACE	X	Y	WIDTH	HEIGHT" >> $SAVED_SESSION

# Check if Compiz or metacity running, hacky would be nice to have
# something better
wnckprop --window=`wnckprop --list | head -1 | awk 'BEGIN {FS=": ";}{print $1;}'` | grep compiz > /dev/null
if [ $? -eq 0 ]; then
    compiz=1
else
    compiz=0
fi

# Get Screen width (only needed when using compiz)
if [ $compiz -eq 1 ]; then
    screen_width=`xdpyinfo | grep "  dimensions:" | awk ' {    \
        dimstr=substr($0, 18, 10);      \
        if (index(dimstr, "x") == 5) {  \
            print substr(dimstr, 1, 4); \
        } else {                        \
            print substr(dimstr, 1, 3); \
        }                               \
    }'`
fi

# Get List of current windows
wnckprop --list > /tmp/$$.wnckprop 2>&1

while read LINE
do
    win_id=`echo $LINE | awk 'BEGIN {FS=": ";}{print $1;}'`

    echo "$LINE";

    if [ "$win_id" != "" ]; then

        # Skip panel and nautilus
        skip=`panel_or_nautilus`
        if [ $skip -eq 0 ]; then
            win_title=`wnckprop --window=$win_id | grep ^Name | awk '{ \
                title=$2; for (i=3; i<=NF; i++) title=title " " $i; print title;}'`
            win_x=`wnckprop --window=$win_id | grep Geometry | awk '{print substr($6, 1, length($6)-1);}'`
            win_y=`wnckprop --window=$win_id | grep Geometry | awk '{print substr($7, 1, length($7)-1);}'`
            win_width=`wnckprop --window=$win_id | grep Geometry | awk '{print substr($8, 1, length($8)-1);}'`
            win_height=`wnckprop --window=$win_id | grep Geometry | awk '{print $9;}'`
            if [ $compiz -eq 1 ]; then
                # Workspace is determined based on X Co-ordinate / screen-width
                if [ $win_x -lt $screen_width ]; then
                    win_workspace=0
                elif [ $win_x -lt 0 ]; then
                    win_workspace=0
                else
                    let win_workspace=$win_x/$screen_width
                    if [ $win_workspace > 0 ]; then
                        let new_x=$screen_width*$win_workspace
                        let win_x=$win_x-$new_x
                    fi
                fi
            else
                win_workspace=`wnckprop --window=$win_id | grep Workspace | awk '{print $3;}'`
            fi

            # echo "$win_title	$win_workspace	$win_x	$win_y	$win_width	$win_height"
            echo "$win_title	$win_workspace	$win_x	$win_y	$win_width	$win_height" >> $SAVED_SESSION
        fi
    fi

done < /tmp/$$.wnckprop

echo "$SAVED_SESSION Generated"

rm /tmp/$$.wnckprop