animwall

#!/bin/sh
#
# The GPLv2 License
#
#   Copyright (C) 2020  Peter Kenji Yamanaka
#
#   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 Street, Fifth Floor, Boston, MA 02110-1301 USA.

# Lowest priority, super nice (make this number smaller to increase priority, cannot go below 0)
__nice_value=19

# $1 wallpaper
# $2 geometry
# $3 screen
start_wallpaper()
{
    printf -- '[ANIMWALL]: Launching...\n'
    printf -- '    Wallpaper: "%s"\n' "$1"
    printf -- '    Geometry:  "%s"\n' "$2"
    printf -- '    Screen:    "%s"\n' "$3"
    
    # Options "-un" only used by xwinwrap-git
    # Will not work with shantz-xwinwrap-git
    
    # Uses deprecated -wid option instead of --wid because
    # xwinwrap will only interpret the WID as window id if it is
    # on its own, attaching it with equals breaks it.
    exec nice -n "${__nice_value}" xwinwrap \
    -g "$2" \
    -ni \
    -st \
    -sp \
    -nf \
    -b \
    -un \
    -ov \
    -- nice -n "${__nice_value}" mpv \
    -wid WID "$1" \
    --no-osc \
    --no-osd-bar \
    --loop-file \
    --player-operation-mode=cplayer \
    --no-audio \
    --panscan=1.0 \
    --no-keepaspect \
    --no-input-default-bindings \
    --hwdec \
    --stop-screensaver=no \
    &
}

stop()
{
    local prompt="$1"
    echo "This subcommand kills all mpv processes, do you want to proceed?"
    if [ $# -eq 0 ] || [ $prompt == "true"]; then
        read -p "[Y]es/[N]o: " yn
        case $yn in
            [Yy]*) pkill mpv ; echo "Stopped" ; return 0 ;;
            [Nn]*) echo "Aborted" ; return  1 ;;
        esac
        elif [ $prompt == "false" ]; then
        pkill mpv
        return 0
    else
        return 1
    fi
}

restart()
{
    stop false
    start
}

start()
{
    if ! command -v mpv > /dev/null; then
        printf -- 'You must have "mpv" installed.\n'
        return 1
    fi
    
    if ! command -v xwinwrap > /dev/null; then
        printf -- 'You must have "xwinwrap" installed.\n'
        return 1
    fi
    
    if ! command -v nice > /dev/null; then
        printf -- 'You must have "nice" installed.\n'
        return 1
    fi
    
    # Check for config file
    animwall_configs=""
    config_dir="${XDG_CONFIG_DIR:-"${HOME}/.config"}/animwall"
    config_location="${config_dir}/animwall.conf"
    if [ -f "${config_location}" ] && [ -r "${config_location}" ]; then
        # printf -- 'Reading animwall.conf from %s\n' "${config_location}"
        animwall_configs="$(cat -- "${config_location}")"
    else
        printf -- 'Could not find animwall.conf file at %s\n' "${config_location}"
        printf -- 'Creating example file...\n'
        
        # Make directory
        mkdir -p "${config_dir}" || {
            printf -- 'Failed to make configuration directory at: %s' "${config_dir}"
            return 1
        }
        
        # Make config file
    printf -- '%s\n' "$(cat << EOF
# This is the configuration file for animwall
#
# Entries are expected one per line in the format
# <FILE>:<WIDTHxHEIGHT+X+Y>:<SCREEN>
#
# Lines beginning with # are ignored
~/Pictures/wallpapers/example.mp4:1920x1080+0+0:0
~/Pictures/wallpapers/example.mp4:1920x1080+1920+0:1
EOF
    )" > "${config_location}"
    return 1
fi

if [ -z "${animwall_configs}" ]; then
    printf -- 'Animwall config was empty!\n'
    return 1
fi

  # Parse config file
  for config in ${animwall_configs}; do
    case "${config}" in
      \#*)
        # printf -- 'Ignore line with comment: %s\n' "${config}"
        continue
        ;;
      *)
        ;;
    esac

    split_config="$(printf -- "%s" "${config}" | tr ':' ' ')"
    wallpaper="$(printf -- "%s" "${split_config}" | awk '{ print $1 }')"
    geometry="$(printf -- "%s" "${split_config}" | awk '{ print $2 }')"
    screen="$(printf -- "%s" "${split_config}" | awk '{ print $3 }')"

    # In case the wallpaper path has ~ as HOME, we replace it
    # Replace all $HOME with literal HOME
    wallpaper="$(printf -- "%s" "${wallpaper}" | sed "s|^\~|\$HOME|g" | sed "s|^\$HOME|${HOME}|g" )"

    if [ -n "${wallpaper}" ] && [ -n "${geometry}" ] && [ -n "${screen}" ]; then
      start_wallpaper "${wallpaper}" "${geometry}" "${screen}"
    # else
    #   if [ -z "${wallpaper}" ]; then
        # printf -- 'Missing wallpaper path in config: %s\n' "${config}"
    #   fi

    #   if [ -z "${geometry}" ]; then
        # printf -- 'Missing geometry in config: %s\n' "${config}"
    #   fi

    #   if [ -z "${screen}" ]; then
        # printf -- 'Missing screen in config: %s\n' "${config}"
    #   fi
    fi

    unset split_config
    unset wallpaper
    unset geometry
    unset screen
    unset config
  done
}

"$@"