Dual-screen interactive slideshow screensaver for MATE

active_user

#!/usr/bin/env bash

# Standard-repo requirements: 
# w, awk, head, mktemp, split, grep, ck-list-sessions, sed, getent, cut

# TODO Check whether awk can't exit immediately after first match
ACTIVE_USER=`w --no-header -s | awk '/ :0 / {print $1}' | head -1`
[ -n "$ACTIVE_USER" ] && {
    echo "$ACTIVE_USER"
    exit 0
}

sessions_dir=`mktemp --tmpdir --directory ConsoleKit-sessions.XXXXXX`

ck-list-sessions | split --lines 13 - "${sessions_dir}/"
matching_session=`grep --files-with-matches --line-regexp '^[[:space:]]\+active = TRUE$' ${sessions_dir}/a* 2> /dev/null | head -1`
if [ $? = 0 ]; then
    user_id=`sed -n 's/^[[:space:]]\+unix-user = .\([[:digit:]]\+\).$/\1/p' $matching_session`
    getent passwd "$user_id" | cut -f 1 -d ':'
    unset user_id
else
    echo 'root'
fi

rm -Rf "$sessions_dir"
unset matching_session sessions_dir

active_user_is_me

#!/usr/bin/env bash

# Custom script requirements: active_user

ACTIVE_USER=`"${HOME}/bin/linux/active_user"`
[ "${ACTIVE_USER:-root}" == "${USER:=$LOGNAME}" ]

count_hardware_displays

#!/usr/bin/env bash

# Standard-repo requirements: xrandr, grep

xrandr | grep -c '\bconnected\b'

idler

#!/usr/bin/env bash

# $1 (optional): timeout in seconds. Defaults to $IDLER_TIMEOUT, which in turn
# defaults to 300.

# If env var DEBUG_IDLER is set to 'true' on entry then debugging information will be output

# Standard-repo requirements: xprintidle, bc, pgrep/pkill, xdotool
# Custom script requirements: active_user_is_me, slideshow

debug () {
    `"${DEBUG_IDLER:-false}"` && eval "echo $1: \$$1 1>&2"
}

"${HOME}/bin/active_user_is_me" || exit 0

# xprintidle needs this
export DISPLAY=:0.0

# Seconds of inactivity until sleep. 0 to disable sleep
time_out=$(( ${1:-${IDLER_TIMEOUT:-300}} * 1000 ))
debug time_out
shift

idle_time="`xprintidle`"
debug idle_time
# Use bc to avoid integer overflow
[ $( echo "${idle_time:-0} > $time_out" | bc ) -eq 0 ] && {
    timed_out=false
    debug timed_out
    # Don't know why this is still in the process table
    pkill mate-screensave
    exit 0
}

# Re-activate slideshow in case something has taken priority
pgrep 'feh' &> /dev/null && {
    xdotool search feh windowactivate %1 windowactivate %2 &> /dev/null
    feh_found=true
    debug feh_found
    exit 0
}
# Programs worth staying up for :)
pgrep 'shutdown|mpg123|mplayer|mate-screensave' &> /dev/null && {
    blocking_app_found=true
    debug blocking_app_found
    exit 0
}
pgrep vlc &> /dev/null && {
    vlc_is_running=true
    debug vlc_is_running
    "${HOME}/bin/vlc_is_playing_music_or_stopped" || {
        vlc_is_not_playing_music_or_stopped=true
        debug vlc_is_not_playing_music_or_stopped
        exit 0
    }
}

"${HOME}/bin/slideshow" $@

my_feh

#!/usr/bin/env bash

# Standard-repo requirements: feh

# Default to right screen
GEOMETRY="${MY_FEH_GEOMETRY:=1280x768+1200+1120}"
feh --geometry "$GEOMETRY" --image-bg black --randomize --recursive \
    --slideshow-delay 3.25 --zoom max --action 'animate -loop 0 %F &' "$@"

slideshow

#!/usr/bin/env bash

# $1 (optional): Window geometry to pass to first (rhs) my_feh process
# $2 (optional): Window geometry to pass to second (lhs) my_feh process

# Custom script requirements: count_hardware_displays, my_feh

################## EDIT ##################
PHOTOS="/path/to/your/photos/"
##########################################

DISPLAYS_COUNT="`${HOME}/bin/X11-utils/count_hardware_displays`"
[[ $DISPLAYS_COUNT == 0 ]] && exit 1

SLIDESHOW="${HOME}/bin/my_feh"
# Right screen
if [ -n "$1" ]; then
    export MY_FEH_GEOMETRY="$1"
fi
"$SLIDESHOW" "$PHOTOS" &>> "${HOME}/slideshow1.log" &
[[ $DISPLAYS_COUNT == 1 ]] && exit 0

sleep 1
# Left screen
if [ -n "$2" ]; then
    export MY_FEH_GEOMETRY="$2"
else
    export MY_FEH_GEOMETRY='1200x1868+0+52'
fi
"$SLIDESHOW" "$PHOTOS" &>> "${HOME}/slideshow2.log" &

vlc_is_playing_music_or_stopped

#!/usr/bin/env bash

# VLC must be launched as vlc --extraintf oldrc:http --rc-unix ~/vlc.sock

# Standard-repo requirements: vlc, pgrep, netcat-openbsd, grep

[ -S "${HOME}/vlc.sock" ] || exit 2
/usr/bin/pgrep vlc &> /dev/null || exit 3

# Change this to a distinctive portion of the pathname of your music collection
                                                                 ##### EDIT ###
echo status | /bin/nc -U "${HOME}/vlc.sock" | /bin/grep --quiet 'Music.\+iTunes\|stop state: 5'
                                                                 ##############