386 lines
11 KiB
Perl
Executable File
386 lines
11 KiB
Perl
Executable File
#!/usr/bin/perl -w
|
|
|
|
# TODO: I reworked the argument parsing and broke the formatted output
|
|
# It was terrible in the first place, so rework that too.
|
|
#
|
|
# Work on a `date`-like format like:
|
|
# "+%c/%m = %p\%"
|
|
# %c - Current absolute
|
|
# %m - Maximum absolute value
|
|
# %p - Current percent
|
|
#
|
|
# to output like:
|
|
# 1000/10000 = 10%
|
|
#
|
|
# Create a new array of hashes to classify the ARGV elements, eg:
|
|
# $0 + "+%c" -= 10 +=4 =1 =100 "+%p"
|
|
# [
|
|
# {
|
|
# "action" => "increment",
|
|
# "value" => 1
|
|
# },{
|
|
# "action" => "print",
|
|
# "value" => "+%c"
|
|
# },{
|
|
# "action" => "decrement",
|
|
# "value" => 10
|
|
# },{
|
|
# "action" => "increment",
|
|
# "value" => 4
|
|
# },{
|
|
# "action" => "set",
|
|
# "value" => 1
|
|
# },{
|
|
# "action" => "set",
|
|
# "value" => 100
|
|
# },{
|
|
# "action" => "print",
|
|
# "value" => "+%p"
|
|
# }
|
|
# ]
|
|
#
|
|
# Process all of these in order. Add an option to show/hide action output
|
|
# so you can either get (shown):
|
|
# 100% 100000 90% 94% 1% 100% 100%
|
|
# or (hidden):
|
|
# 100000 100%
|
|
#
|
|
# All of the events would still occur between the output values.
|
|
#
|
|
# Add a delay option between increments and a delay between actions (does not
|
|
# apply to 'print'). This could be used to make a gradual sweep with:
|
|
#
|
|
# --delay-increment=100 --delay-action=0
|
|
#
|
|
# or to blink with:
|
|
#
|
|
# --delay-increment=0 --delay-action=1000
|
|
#
|
|
# With the latter, you could even have the backlight do morse code:
|
|
# clear | S ( . . . ) |pause| O ( _ _ _ ) |pause|
|
|
# =0 =100 =0 =100 =0 =100 =0 =0 =100 =100 =0 =100 =100 =0 =100 =100 =0 =0 ...
|
|
#
|
|
# Perhaps add an argument to repeat indefinitely. This is all getting a bit
|
|
# silly, but kinda fun to think about.
|
|
|
|
# Files containing current and max brightness values
|
|
my $cur_file = "/sys/class/backlight/intel_backlight/brightness";
|
|
my $max_file = "/sys/class/backlight/intel_backlight/max_brightness";
|
|
my $last_file = "/home/jpm/.config/blc.last";
|
|
|
|
sub to_percent
|
|
{
|
|
my $value = shift;
|
|
$value = int($value/get_max()*100);
|
|
return $value . '%';
|
|
}
|
|
|
|
sub get_offset
|
|
{
|
|
return int(get_max()/100);
|
|
}
|
|
|
|
sub get_current
|
|
{
|
|
open(my $c,'<',"$cur_file");
|
|
my $current = <$c>;
|
|
close $c;
|
|
chomp $current;
|
|
return $current;
|
|
}
|
|
|
|
sub get_max
|
|
{
|
|
open(my $m,'<',"$max_file");
|
|
my $max = <$m>;
|
|
close $m;
|
|
chomp $max;
|
|
return $max;
|
|
}
|
|
|
|
sub get_min
|
|
{
|
|
return int((get_max()/100)+2);
|
|
}
|
|
|
|
sub writable
|
|
{
|
|
if (! -w $cur_file) {
|
|
die "You don't have permission to write $cur_file\n";
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
sub increment
|
|
{
|
|
if (writable()) {
|
|
my $current = get_current();
|
|
my $max = get_max();
|
|
my $target = $current+get_offset();
|
|
if ($target > $max) {
|
|
$target = $max;
|
|
}
|
|
open(my $c,'>',"$cur_file");
|
|
print $c $target;
|
|
close $c;
|
|
return $target;
|
|
}
|
|
}
|
|
|
|
sub decrement
|
|
{
|
|
if (writable()) {
|
|
my $current = get_current();
|
|
my $min = get_min();
|
|
my $target = $current-get_offset();
|
|
if ($target < $min) {
|
|
$target = $min;
|
|
}
|
|
open(my $c,'>',"$cur_file");
|
|
print $c $target;
|
|
close $c;
|
|
return $target;
|
|
}
|
|
}
|
|
|
|
sub set
|
|
{
|
|
my $value = shift;
|
|
if (writable()) {
|
|
$current = get_current();
|
|
if ($value > $current) {
|
|
for (my $i=$current;$i<=$value;$i++) {
|
|
open(my $c,'>',"$cur_file");
|
|
print $c $i;
|
|
close $c;
|
|
}
|
|
} else {
|
|
for (my $i=$current;$i>=$value;$i--) {
|
|
open(my $c,'>',"$cur_file");
|
|
print $c $i;
|
|
close $c;
|
|
}
|
|
}
|
|
return $value;
|
|
}
|
|
}
|
|
|
|
sub help
|
|
{
|
|
print "
|
|
Backlight Control
|
|
|
|
Usage: blc.pl [--silent|--notify] [OPTION] [VALUE]
|
|
|
|
With no option the backlight information is printed as JSON.
|
|
|
|
Output printed to STDOUT unless:
|
|
|
|
--silent Do not display output (overrides --notify)
|
|
--notify Send output to notification daemon. --notify=N will
|
|
change the display duration in ms. Default is 200ms
|
|
|
|
Output option must preceed the first Action option.
|
|
|
|
Actions:
|
|
|
|
= VALUE Set backlight to specific value. VALUE greater than
|
|
100 will be treated as absolute value. VALUE eqaul to
|
|
or less than 100 will be treated as a percentage
|
|
+ Increment by 1%
|
|
+= VALUE Increment by VALUE percent
|
|
- Decrement by 1%
|
|
-= VALUE Decrement by VALUE percent
|
|
|
|
Actions corrected to 1% or 100% if over or under. All actions
|
|
provide output as a percentage, with the % symbol.
|
|
|
|
Final percentage printed as below, skipping other options.
|
|
|
|
Print:
|
|
|
|
== Print current absolute value
|
|
^ Print maximum absolute value
|
|
% Print current percentage (does not include % symbol)
|
|
--help Help (not impacted by --silent or --notify)
|
|
--HELP Advanced help (same as above)
|
|
|
|
Any other option will be printed literally";
|
|
}
|
|
|
|
sub advanced
|
|
{
|
|
$current = get_current();
|
|
$max = get_max();
|
|
print ".
|
|
|
|
Print functions can be strung together but command will exit
|
|
with the first non-print option. eg.
|
|
|
|
\$ blc.pl == / ^
|
|
21/100
|
|
\$ blc.pl == ++
|
|
('==' ignored)
|
|
(Backlight incremented)
|
|
|
|
Escape options with \\ in quotes to display them literally. eg.
|
|
|
|
\$ blc.pl == / ^ '\\=' % \'\\%\'
|
|
" . $current . "/" . $max . "=" . int($current/$max*100) . "%
|
|
|
|
Only one \'\\' is removed per block. eg.
|
|
|
|
\$ blc.pl '\\% \\'
|
|
% \\
|
|
|
|
";
|
|
}
|
|
|
|
my $current = get_current();
|
|
my (@output, $target, $silent, $notify);
|
|
|
|
my $operation_found = 0;
|
|
if (scalar @ARGV) {
|
|
while ($arg = shift) {
|
|
if ($arg eq '%') {
|
|
push @output,int(get_current()/get_max()*100);
|
|
} elsif ($arg eq '^') {
|
|
push @output,get_max();
|
|
} elsif ($arg eq '==') {
|
|
push @output,get_current();
|
|
} elsif ($arg eq '--help') {
|
|
help();
|
|
print " (see --HELP).\n\n";
|
|
exit();
|
|
} elsif ($arg eq '--HELP') {
|
|
help();
|
|
advanced();
|
|
exit();
|
|
} elsif ($arg eq '--silent') {
|
|
$silent = 1;
|
|
} elsif ($arg =~ /^--notify/) {
|
|
$notify = 1;
|
|
if ($arg =~ /=[0-9]+$/) {
|
|
$duration = $arg;
|
|
$duration =~ s/.*=([0-9]+)/$1/;
|
|
} else {
|
|
$duration = 1000;
|
|
}
|
|
} elsif ($arg eq '+') {
|
|
unshift(@ARGV,1);
|
|
unshift(@ARGV,'+=');
|
|
} elsif ($arg =~ /^\+=/) {
|
|
my $offset;
|
|
if ($arg =~ m/^\+=(.+)$/) {
|
|
$offset = $1;
|
|
} else {
|
|
$offset = shift || die "+= without accompanying offset value\n";
|
|
}
|
|
unless ($offset =~ /^\d+$/) {
|
|
die "+= <value> is not a number ($offset)\n";
|
|
}
|
|
for (my $j=0;$j<$offset;$j++) {
|
|
$target = increment();
|
|
@output = to_percent($target);
|
|
}
|
|
$operation_found = 1;
|
|
} elsif ($arg eq '-') {
|
|
unshift(@ARGV,1);
|
|
unshift(@ARGV,'-=');
|
|
} elsif ($arg =~ /^-=/) {
|
|
my $offset;
|
|
if ($arg =~ m/^-=(.+)$/) {
|
|
$offset = $1;
|
|
} else {
|
|
$offset = shift || die "-= without accompanying offset value\n";
|
|
}
|
|
unless ($offset =~ /^\d+$/) {
|
|
die "-= <value> is not a number ($offset)\n";
|
|
}
|
|
for (my $j=0;$j<$offset;$j++) {
|
|
$target = decrement();
|
|
@output = to_percent($target);
|
|
}
|
|
$operation_found = 1;
|
|
} elsif ($arg =~ m/^=/) {
|
|
my $value;
|
|
if ($arg =~ m/^=(.+)$/) {
|
|
$target = $1;
|
|
} else {
|
|
$target = shift || die "= without accompanying absolute value\n";
|
|
}
|
|
unless ($target =~ /^\d+$/) {
|
|
die "= <value> is not a number ($target)\n";
|
|
}
|
|
if ($target < 1) {
|
|
$target = set(get_min());
|
|
} elsif ($target > get_max()) {
|
|
$target = set(get_max());
|
|
} elsif ($target > 100) {
|
|
$target = set($target);
|
|
} else {
|
|
$target = set(
|
|
int((get_max()*$target/100)+1)
|
|
);
|
|
}
|
|
@output = to_percent($target);
|
|
$operation_found = 1;
|
|
} else {
|
|
push(@output,$arg);
|
|
}
|
|
}
|
|
} else {
|
|
@output = (
|
|
'{"Backlight":{"Max":"'
|
|
. get_max()
|
|
. '","Current":"'
|
|
. get_current()
|
|
. '","Percentage","'
|
|
. int(get_current()/get_max()*100)
|
|
. '%"}}'
|
|
);
|
|
}
|
|
|
|
open(my $fh,'>',$last_file);
|
|
print $fh get_current();
|
|
close($fh);
|
|
|
|
print $_."\n" foreach(@output);
|
|
if ($silent) {
|
|
exit();
|
|
} elsif ($notify) {
|
|
my $concat = '';
|
|
foreach (@output) {
|
|
$concat .= $_;
|
|
}
|
|
=pod
|
|
use Gtk2::Notify -init, "Backlight";
|
|
my $notification = Gtk2::Notify::new('Backlight', $concat, '', "notification-display-brightness");
|
|
|
|
$notification->set_hint_string('x-canonical-private-synchronous','blc');
|
|
$notification->set_urgency('NOTIFY_URGENCY_LOW');
|
|
$notification->set_hint_int32('value',(split('%',$concat))[0]);
|
|
$notification->set_timeout($duration);
|
|
$notification->show();
|
|
exit;
|
|
print "notify-send --urgency=normal"
|
|
. ' --icon="notification-display-brightness"'
|
|
. ' --hint=string:x-canonical-private-synchronous:blc'
|
|
. ' --expire-time=' . $duration
|
|
. ' "Backlight"'
|
|
. ' "' . $concat . " '" . join("','", @output) . "'\"";
|
|
system "notify-send --urgency=normal"
|
|
. ' --icon="notification-display-brightness"'
|
|
. ' --hint=string:x-canonical-private-synchronous:blc'
|
|
. ' --hint=int:value:' . (split('%',$concat))[0]
|
|
. ' --expire-time=' . $duration
|
|
. ' "' . $concat . "\"";
|
|
=cut
|
|
|
|
exit();
|
|
} else {
|
|
print foreach @output;
|
|
print "\n";
|
|
exit();
|
|
}
|