#!/bin/bash
# Daniel Napora 2021 <napcok@gmail.com>
#: deskmngr - save all programs (windows) running on current desktop in session file.
#:           With windows positions and state (decorated or not)
#: Usage:
#:                -s|save - save session from current desktop
#:                -r|restore sesionfile desktop_nr - restore session from sessionfile on desktop
#:
SESSIONDIR="$HOME/.config/deskmngr/"
mkdir -p $SESSIONDIR

savesession() {
    curdesk=$(wmctrl -d | grep "*" | awk '{print $1}')
    echo "$curdesk"
    filename=$(yad --center --title "Save session as:" --entry --entry-label="Session name" --entry-text="Session name") || exit 1
    #echo "$filename"
    windows=()
    wmctrl -l -p -G | {
    while IFS= read -r line
    do
        read -r ID DESK PID x_offset y_offset width height rest< <(echo $line)
        if [[ "$DESK" != "-1" ]]; then  
            if [[ "$DESK" == "$curdesk" ]]; then
                cmdline=$(ps -fp $PID -o command=)
                xwininfo -id "$ID" -wm | grep -q Undecorated && D="u" || D="d"
                ##
                frameY=$(xwininfo -id "$ID" -stats | grep "Relative upper-left Y:" | cut -d: -f2)
                frameX=$(xwininfo -id "$ID" -stats | grep "Relative upper-left X:" | cut -d: -f2)
                
                windows+=("$D $width $height $((x_offset-frameX)) $((y_offset-2*frameY))  $cmdline")
                
                
                #windows+=("$D $width $height $x_offset $y_offset  $cmdline")
            fi
        fi
    done 
    printf "%s\n" "${windows[@]}" > "$SESSIONDIR/${filename// /_}.desk"
    # Serch replace
    if command -v sd 1>/dev/null; then
    sd -s "/usr/lib/chromium/chromium" "chromium --new-window" "$SESSIONDIR/${filename// /_}.desk"
    sd -s "/usr/lib/firefox/firefox" "firefox --new-window" "$SESSIONDIR/${filename// /_}.desk"
    sd -s "/usr/bin/python3 /usr/bin/terminator" "terminator" "$SESSIONDIR/${filename// /_}.desk"
    sd -s "geany" "geany -i" "$SESSIONDIR/${filename// /_}.desk"
    sd -s "cherrytree" "cherrytree --new-window" "$SESSIONDIR/${filename// /_}.desk"
    sd -s "pcmanfm -d" "pcmanfm" "$SESSIONDIR/${filename// /_}.desk"
    fi
    #echo "$desktop"
    geany "$SESSIONDIR/${filename// /_}.desk"
    }
}

restoresession() {
    sessfile="$1"
    DESK="$2"
    echo "$sessfile"
    cat "$SESSIONDIR/$sessfile" | {
        while IFS= read -r line
    do
    read -r D width height x y cmdline< <(echo $line)
    #echo -e "Desktop ID: $DESK , Decorated: $D, Size: ${width}x${height}, position: $x $y\nCommandline: $cmdline"
    wmctrl -s ${DESK}
    ${cmdline} > /dev/null 2>&1 & 
    # wmctrl -lp| tail -n1 |awk '{print $1}'
    
    # _NET_WM_STATE(ATOM) = _OB_WM_STATE_UNDECORATED
    sleep 1.5
    wmctrl -r :ACTIVE: -b remove,maximized_vert,maximized_horz
    if [[ "$D" = "u" ]]; then xdotool key super+b; fi
    wmctrl -r :ACTIVE: -e 0,${x},${y},${width},${height}

    done
    }
}

listsessions() {
    #for i in $(ls -1 ${SESSIONDIR}); do echo "${i}";done
    ls -1 ${SESSIONDIR}
}

usage() {
    grep "^#:" $0 | while read DOC; do printf '%s\n' "${DOC###:}"; done
    exit
}

case "$1" in
    -s|save) savesession "$2";;
    -r|restore) restoresession "$2" "$3";;
    -l|list) listsessions ;;
    -h|--help) usage;;
    *) usage;;
esac

exit 0