#!/bin/sh
#
# Copyright (c) 2020 Uwe Werler <uwe@werler.is>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
# 
#
# This is a small script to adjust brightness at my Dell Latitude via xrand
# because xbacklight / wsconsctl doesn't work. It's usually invoked my cwm.
# Therefore I have the following bindings configured: #
#
# bind-key 4-F11  '~/bin/brightness.sh -0.1'
# bind-key 4-F12  '~/bin/brightness.sh +0.1'
# bind-key C4-F11 '~/bin/brightness.sh 0.5'
# bind-key C4-F12 '~/bin/brightness.sh 1.0'

xrandr --verbose | { while read _line; do

  case $_line in
    *\ connected*)
    DEV=${_line%% connected*}
    ;;
    Brightness:\ *)
    [[ ${1} == "1.0" ]] && { xrandr --output ${DEV} --brightness ${1}; continue; }
    [[ ${1} == "0.5" ]] && { xrandr --output ${DEV} --brightness ${1}; continue; }
    xrandr --output ${DEV} --brightness $( echo ${_line##Brightness: }${1} | bc)
    ;;
  esac
done
}

#vim: set ai:ts=2:et:sw=2