423 lines
13 KiB
Perl
Executable File
423 lines
13 KiB
Perl
Executable File
#!/usr/bin/perl
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########################################################################
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# Usage
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########################################################################
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#
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# $ displays.pl [layout] [-w]
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#
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# layout Name of desired layout, as configured starting at line 100
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# If missing, last known layout is used (logged to file $last)
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# -w (Re)load waybar only. Skip display configuration. Only kill
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# existing waybars and start new ones for desired layout
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########################################################################
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# Dependencies
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########################################################################
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#
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# Depends on JSON::XS and Proc::ProcessTable
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#
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# Debian:
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# apt install libjson-xs-perl libproc-processtable-perl
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########################################################################
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# Directories and Files
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########################################################################
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# Template is a normal config with the following in place of values:
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# "output": __OUTPUT__
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# "position": __POSITION__
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# "width": __WIDTH__ (optional)
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my $waybar_template = "$ENV{'HOME'}/.dotfiles/waybar/config.template";
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my $swaysock = $ENV{'SWAYSOCK'} || $ENV{'HOME'} . "/.spool/sway-ipc.sock";
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# Path to actual config file generated from template
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my $waybar_config = "$ENV{'HOME'}/.config/waybar/config";
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# File to log and recover last used layout name
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my $last = "$ENV{'HOME'}/.spool/last_display";
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# File to log active outputs (used by swayidle, and to attempt to restore
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my $active_outputs = "$ENV{'HOME'}/.spool/active_outputs";
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########################################################################
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# Display Serials and Names
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########################################################################
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# Hash to match display model name to internal name
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# You can get the model from (quoted with *):
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# $ swaymsg -t get_outputs --raw
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my %outputs = (
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'LG TV SSCR2' => 'TV',
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'Paperlike253' => 'eInk',
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'0x4140' => 'yoga'
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);
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########################################################################
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# Display Configurations
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########################################################################
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# First-level key of hash is the name of each configuration
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# Second-level keys are the display friendly-names, above
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# Third-level are the actual settings for that display
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my %configs = (
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'Both' => {
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'yoga' => {
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'on' => 0
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},
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'eInk' => {
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'on' => 1,
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'width' => 3200,
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'height' => 1800,
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'x' => 0,
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'y' => 0,
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'rotate' => 90,
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'scale' => 2,
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'waybar' => 'top',
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'fallback' => '#fefefe',
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},
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'TV' => {
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'on' => 1,
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'width' => 3840,
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'height' => 2160,
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'x' => 900,
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'y' => 0,
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'rotate' => 0,
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'scale' => 1.33333,
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'waybar' => 'top',
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'fallback' => '#010101',
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'bg' => "$ENV{HOME}/wallpapers/wallpaper.png"
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},
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},
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'detached' => {
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'yoga' => {
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'on' => 1,
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'width' => 2560,
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'height' => 1440,
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'x' => 0,
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'y' => 0,
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'rotate' => 0,
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'scale' => 1.33333,
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'waybar' => 'bottom',
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'fallback' => '#010101',
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'bg' => "$ENV{HOME}/wallpapers/wallpaper.png"
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},
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'eInk' => {
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'on' => 0
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},
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'TV' => {
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'on' => 0
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}
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},
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'eInk' => {
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'yoga' => {
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'on' => 0
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},
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'eInk' => {
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'on' => 1,
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'width' => 3840,
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'height' => 2160,
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'x' => 0,
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'y' => 0,
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'rotate' => 0,
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'scale' => 1.33333,
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'waybar' => 'top',
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'fallback' => '#010101',
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'bg' => "$ENV{HOME}/wallpapers/wallpaper.png"
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},
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'TV' => {
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'on' => 0
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},
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},
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'TV' => {
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'yoga' => {
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'on' => 0
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},
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'TV' => {
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'on' => 1,
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'width' => 3840,
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'height' => 2160,
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'x' => 0,
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'y' => 0,
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'rotate' => 0,
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'scale' => 1.33333,
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'waybar' => 'top',
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'fallback' => '#010101',
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'bg' => "$ENV{HOME}/wallpapers/wallpaper.png"
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},
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}
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);
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########################################################################
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# Program (do not edit below)
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########################################################################
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use strict;
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use warnings;
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my $waybar_only = 0;
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my $restore = 0; # Set if no config is provided. Requires validation.
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my $config;
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if (scalar(@ARGV)) {
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while (@ARGV) {
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my $arg = shift;
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if ($arg eq "-w") {
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$waybar_only = 1;
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} else {
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if (defined $config) {
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die "Too many arguments.\n";
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}
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$config = $arg;
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}
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}
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}
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# Get previous config if one is not provided
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unless (defined $config) {
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open(my $fh, '<', $last) ||
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die "Config name not provided and failed to open $last\n";
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$config = <$fh>;
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close($fh);
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chomp $config;
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$restore = 1;
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}
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# Bail if requested config doesn't exist
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if (!defined($configs{$config})) {
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if ($restore) {
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# If restoration is attempted with invalid config, just enable eDP-1
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$config = 'detached';
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} else {
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die "$config is not a defined configuration: "
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. join(', ', keys %configs) . "\n";
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}
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}
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# Write config that is to be used so that it can be recovered as default
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if (open(my $fh, '>', $last)) {
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print $fh $config;
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close($fh);
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} else {
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print STDERR "Config name cannot be logged to: $last\n";
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}
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# Fetch connected displays
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use JSON::XS;
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my $json = JSON::XS->new();
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my $displays_raw = `swaymsg -s $swaysock -t get_outputs --raw`;
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my $displays = $json->decode($displays_raw);
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# For each connected display, collect the desired settings for enabled
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# displays and a list of displays to disable
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my $on;
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my @off;
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for (my $i = 0; $i < scalar(@$displays); $i++) {
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# If a display is found without any settings print error and turn it off
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unless (defined $configs{$config}{$outputs{$displays->[$i]->{model}}}){
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print STDERR "Output $displays->[$i]->{name} ("
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. $displays->[$i]->{model}
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. ") found without defined function. Disabling.\n";
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push @off, $displays->[$i]->{name};
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next;
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}
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# If display is enabled, copy all of the desired settings
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if ($configs{$config}{$outputs{$displays->[$i]->{model}}}{on}) {
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$on->{$outputs{$displays->[$i]->{model}}} =
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$configs{$config}{$outputs{$displays->[$i]->{model}}};
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$on->{$outputs{$displays->[$i]->{model}}}{output} =
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$displays->[$i]->{name};
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# Otherwise simply list it for disabling
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} else {
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push @off, $displays->[$i]->{name};
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}
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}
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# Verify that all requested displays are actually available
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my @unavailable;
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foreach my $output (keys %$on) {
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my $found = 0;
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foreach my $o (keys %outputs) {
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if ($outputs{$o} eq $output) {
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$found = 1;
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last;
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}
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}
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unless ($found) {
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push @unavailable, $output;
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}
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}
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if (scalar(@unavailable)) {
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die "Config requires unavailable output(s) " . join(', ', @unavailable)
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. "\n";
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}
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# Skip enabling/disabling displays if only running waybar (re)start
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unless ($waybar_only) {
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# Number of simultaneous outputs is limited by gpu, so disabled displays
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# first
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foreach (@off) {
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# Sway returns status as JSON
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my $res_raw = `swaymsg -s $swaysock output $_ disable`;
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my $res = $json->decode($res_raw)->[0];
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# If failed, print to STDERR
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unless ($res->{success}) {
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print STDERR "Error ($res->{error}) in command 'swaymsg"
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. " -s $swaysock output $_ disable'\n";
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}
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}
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}
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# Kill existing Waybars
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require Proc::ProcessTable;
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my $t = new Proc::ProcessTable;
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foreach my $p ( @{ $t->table } ) {
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my $cmndline = $p->{'cmndline'};
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$cmndline =~ s/\s*$//g;
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if ($cmndline =~ /^waybar.*/) {
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# Never kill this process
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if ($p->{'pid'} == $$) {
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next;
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} else {
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$p->kill(9);
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}
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}
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}
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# Load in config template
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my $template;
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if (open (my $fh, '<', $waybar_template)) {
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while (<$fh>) {
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$template .= $_;
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}
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close $fh;
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chomp $template;
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} else {
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print STDERR "Failed to load template $waybar_template\n";
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}
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# If template is already set up as an array, remove the square brackets so that
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# we can concatenate multiple displays
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$template =~ s/^[^\[\{]*\[(.*)\]$/$1/s;
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# Setup waybar config file
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my $waybar = '';
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# Configure each enabled display
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my @active;
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foreach my $out (keys %$on) {
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push @active, $on->{$out}->{output};
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unless ($waybar_only) {
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# Build command, starting by enabling and powering on
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my $cmd = "swaymsg -s $swaysock output $on->{$out}->{output}" .
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" enable dpms on";
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# If additional options are provided, add them to command
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if (defined $on->{$out}->{scale}) {
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$cmd .= " scale $on->{$out}->{scale}";
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} else {
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$cmd .= " scale 1";
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}
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if (defined $on->{$out}->{rotate}) {
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$cmd .= " transform $on->{$out}->{rotate}";
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} else {
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$cmd .= " transform 0";
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}
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if (defined $on->{$out}->{x} && defined $on->{$out}->{y}) {
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$cmd .= " position $on->{$out}->{x} $on->{$out}->{y}";
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}
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if (defined $on->{$out}->{width} &&
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defined $on->{$out}->{height} )
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{
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$cmd .= " mode $on->{$out}->{width}x" .
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"$on->{$out}->{height}";
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}
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if (defined $on->{$out}->{bg} &&
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-f $on->{$out}->{bg})
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{
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$cmd .= " bg $on->{$out}->{bg} fit";
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if (defined $on->{$out}->{fallback}) {
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$cmd .= " $on->{$out}->{fallback}";
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}
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} elsif (defined $on->{$out}->{fallback}) {
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$cmd .= " bg $on->{$out}->{fallback} solid_color";
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}
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# Sway returns status as JSON
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my $res_raw = `$cmd`;
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#print $res_raw . "\n";
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my $res = $json->decode($res_raw)->[0];
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# If failed, print to STDERR
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unless ($res->{success}) {
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print STDERR "Error ($res->{error}) in command " .
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"'$cmd'\n";
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}
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}
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# Skip waybar setup if template failed to be loaded
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if ( (defined $template) &&
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(defined $on->{$out}->{waybar}) &&
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($on->{$out}->{waybar} =~ m/(top|bottom|left|right)/) )
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{
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# If there's already a display set up, add a comma
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unless ($waybar eq '') {
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$waybar .= ',';
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}
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$waybar .= $template;
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# Replace basic preferences
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$waybar =~ s/__OUTPUT__/"$on->{$out}->{output}"/gg;
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$waybar =~ s/__POSITION__/"$on->{$out}->{waybar}"/gg;
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if (defined $on->{$out}->{width}) {
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my $x = $on->{$out}->{width};
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if (defined $on->{$out}->{scale}) {
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$x = sprintf("%.0d", $x / $on->{$out}->{scale});
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}
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$waybar =~ s/__WIDTH__/$x/gg;
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# If width is not set, comment that line out to use default
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} else {
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$waybar =~ s/([^\s]*\s*)__WIDTH__/\/\/ $1__WIDTH__/gg;
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}
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}
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}
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# Log active outputs for recovery after crash/reboot
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if (open(my $fh, '>', $active_outputs)) {
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print $fh join(' ', @active);
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close($fh);
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} else {
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print STDERR "Cannot write active outputs to: $active_outputs\n";
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}
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# Restore array formatting
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$waybar = '[' . $waybar . ']';
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# Start Waybar as fork
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my $pid = fork;
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unless ($pid) {
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open STDIN, '/dev/null';
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open STDOUT, '>>/dev/null';
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open STDERR, '>>/dev/null';
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# Write config to a temporary file
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if (open (my $fh, '>', $waybar_config)) {
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print $fh $waybar;
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close $fh;
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} else {
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die "Failed to write configuration file: $waybar_config\n";
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}
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my $waydisplay = $ENV{'WAYLAND_DISPLAY'} || 'wayland-0';
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`WAYLAND_DISPLAY=$waydisplay nohup waybar -b waybar0 --config=$waybar_config >> $ENV{'HOME'}/.waybar.log`;
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}
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