automated theme switching for flluxbox

a themeswitch.sh

#!/bin/bash
#
# automate switching between dark and light themes in fluxbox. it currently
# changes themes of fluxbox, gtk2/3, tint2, hexchat and liferea.

declare -A BRIGHTNESS=( [light]=100 [dark]=0 )
# declare -A BRIGHTNESS=( [light]=4 [dark]=6 )

declare -A VSCODE_THEME=(
  [light]="Atom One Light"
  [dark]="Atom One Dark"
)

usage () {
cat << EOF
Switch desktop to dark or light theme.
Usage: ${0##*/} [-v|--verbose] [-h|--help] [-d|--dark|-l|--light] or dark/light

  -v --verbose    enable logging.
  -h --help       show this help.
  -d --dark       switch to dark style
  -l --light      switch to light style

There is no magic involved. You have to modifiy this script, to match your
desired styles and themes.

Use cron or redshift to automate theme switching.
EOF
}

# use: log && echo "write something to stdout"
l=1; log () { return $l; }

die () {
  printf '%s\n\n' "$1" >&2
  usage
  exit 1
}

# is running
R () {
  pidof $1 > /dev/null
  return $?
}

# this is for gsettings
uid=$(id -u)
export DISPLAY=:0
export DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/$uid/bus"

# make sure gnome-settings-daemon is running
R gnome-settings-daemon || gnome-settings-daemon &> /dev/null &

reloadGTK () {
python - <<EOF
import gtk
events=gtk.gdk.Event(gtk.gdk.CLIENT_EVENT)
data=gtk.gdk.atom_intern("_GTK_READ_RCFILES", False)
events.data_format=8
events.send_event=True
events.message_type=data
events.send_clientmessage_toall()
EOF
}

# common actions before switching
before () {
  ret=1
  cur=$(grep gtk-application-prefer-dark ~/.config/gtk-3.0/settings.ini| sed 's/.*= *//g')
  if [[ ( $cur = 1 && $1 = dark ) || ( $cur = 0 && $1 = light ) ]]; then
    log && echo -e "$(date +'%a %h %e %H:%M:%S') $1 (doing nothing)"
  else
    ret=0
  fi
  return $ret
}

# define some light switch actions here
light () {
  # gsettings can't change this value, but it's useful for plugins (e.g. in atom and chrome)
  sed -i -r 's/(\s*gtk-application-prefer-dark-theme\s*=\s*)(.+)/\10/g' ~/.config/gtk-3.0/settings.ini
}

# define some dark switch actions here
dark () {
  sed -i -r 's/(\s*gtk-application-prefer-dark-theme\s*=\s*)(.+)/\11/g' ~/.config/gtk-3.0/settings.ini
}

# common actions after switching
after () {
  log && echo -e "$(date +'%a %h %e %H:%M:%S') $1"

  # set display brightness
  # until sudo ddccontrol -r 0x10 -w ${BRIGHTNESS[$1]} dev:/dev/i2c-4 2>/dev/null|tail -1|grep "+/${BRIGHTNESS[$1]}/100" > /dev/null ; do sleep 0.1; done
  # until sudo ddccontrol -r 0xdc -w ${BRIGHTNESS[$1]} dev:/dev/i2c-4 2>/dev/null|tail -1|grep "+/${BRIGHTNESS[$1]}/7" > /dev/null; do sleep 0.1; done;
  # ~/.bin/sabr -b ${BRIGHTNESS[$1]}

  # fluxbox style, reloadstyle fixes issues with style setting
  fluxbox-remote "setstyle ~/.fluxbox/styles/Flat Plat $1"
  fluxbox-remote reloadstyle

  # wallpapers
  feh --bg-scale ~/Pictures/wallpapers/1920x1200/Debian\ $1.png
  # feh --bg-fill ~/Pictures/wallpapers/1080x1920/Debian\ $1.png ~/Pictures/wallpapers/1920x1200/Debian\ $1.png ~/Pictures/wallpapers/1600x768/*
  # feh --bg-fill "`shuf -n1 -e ~/Pictures/wallpapers.$1/1080x1920/*`" "`shuf -n1 -e ~/Pictures/wallpapers.$1/1920x1200/*`" "`shuf -n1 -e ~/Pictures/wallpapers.$1/1600x768/*`"
  echo -e "$(cat ~/.fehbg | tail -n +2)\n$(cat ~/.fehbg.hist|head -n 4)" > ~/.fehbg.hist

  # xfce4-terminal
  cp ~/.config/xfce4/terminal/terminalrc.$1 ~/.config/xfce4/terminal/terminalrc

  #conky
  cp ~/.config/conky/statusbar.conf.$1 ~/.config/conky/statusbar.conf
  cp ~/.config/conky/infopanel/conkyrc.$1 ~/.config/conky/infopanel/conkyrc

  # gtk2
  cp ~/.gtkrc-2.0.$1 ~/.gtkrc-2.0
  reloadGTK

  # gtk3 (needs gnome-settings-daemon)
  gsettings set org.gnome.desktop.interface icon-theme acyls-$1
  gsettings set org.gnome.desktop.interface gtk-theme Flat-Plat-$1-compact

  # tint2
  cp ~/.config/tint2/tint2rc.$1 ~/.config/tint2/tint2rc
  killall -SIGUSR1 tint2

  # hexchat (this is a custom build, there's no reloadstyle in regular hexchat)
  cp ~/.config/hexchat/colors_flat_$1.conf ~/.config/hexchat/colors.conf
  R hexchat && hexchat -e -c "gui reloadcolors"

  # xrdb (xterm and others)
  cp ~/.Xresources.$1 ~/.Xresources && xrdb ~/.Xresources

  # vscode
  sed -i -r "s/(\"workbench\.colorTheme\": \")(.+)/\1${VSCODE_THEME[$1]}\",/g" ~/.config/Code/User/settings.json

  #tmux
  cp ~/.tmux.conf.$1 ~/.tmux.conf && R tmux && tmux source-file ~/.tmux.conf
}


while :; do
  case $1 in
    -h|-\?|--help)
      usage
      exit
      ;;
    -v|--verbose)
      l=0
      ;;
    -l|--light|light)
      before light && light && after light
      break
      ;;
    -d|--dark|dark)
      before dark && dark && after dark
      break
      ;;
    -?*)
      printf 'WARN: Unknown option (ignored): %s\n' "$1" >&2
      ;;
    ?*)
      die "ERROR: Unknown argument: \"$1\" (expected dark or light)"
      break
      ;;
    *)
      die "ERROR: Missing argument, append \"dark\" or \"light\"."
      break
      ;;
  esac
  shift
done

atom init.js

/*
* file: ~/.atom/init.js
* desc: watches ~/.config/gtk-3.0/settings.ini for changes in gtk-application-prefer-dark-theme
* and switches atom themes accordingly.
*/

const fs = require('fs')
const path = require('path')
const home = require('os').homedir()
const gtk3dir = path.join(home, '.config/gtk-3.0')
const gtk3file = path.join(gtk3dir, 'settings.ini')

let currentMode = ''

const updateTheme = debounce(function() {
  fs.readFile(gtk3file, (err, gtk3upd) => {
    if (err) return;
    const newMode = decode(gtk3upd.toString()).Settings['gtk-application-prefer-dark-theme'];
    if (newMode !== currentMode) {
      currentMode = newMode
      atom.config.settings.core.themes = atom.themes.getActiveThemeNames().map(name => name.replace(/(dark|light)/, currentMode==='0'?'light':'dark'));
      atom.themes.activateThemes();
    }
  })
}, 100)

fs.watch(gtk3dir, (a,b)=>{
  if(b!=='settings.ini') return
  updateTheme()
})

setTimeout(updateTheme, 15e3)

redshift hook.sh

#!/bin/sh
#
# file: ~/.config/redshift/hooks/themeswitch.sh
# desc: call themeswitch on reshift events

case $1 in
  period-changed)
    case $3 in
      night)
      	exec ~/.bin/themeswitch dark
      	;;
      daytime)
        exec ~/.bin/themeswitch light
        ;;
    esac
    ;;
esac