441 lines
8.0 KiB
Perl
Executable File
441 lines
8.0 KiB
Perl
Executable File
#!/usr/bin/env perl
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#
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# Copyright (c) 2022 Omar Polo <op@omarpolo.com>
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#
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# Permission to use, copy, modify, and distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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use strict;
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use warnings;
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use v5.12;
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use open ":std", ":encoding(UTF-8)";
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use utf8;
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use Curses;
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use POSIX qw(:sys_wait_h setlocale LC_ALL);
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use Text::CharWidth qw(mbswidth);
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use IO::Poll qw(POLLIN);
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use Time::HiRes qw(clock_gettime CLOCK_MONOTONIC);
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use Getopt::Long qw(:config bundling);
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use Pod::Usage;
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my $run = 1;
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my $pfile;
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my $trim = "";
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my $pair_n = 1;
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my @songs;
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my $current_song;
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my $playlist_cur;
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my $playlist_max;
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my $time_cur;
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my $time_dur;
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my $status;
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my $mode;
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my $last_lines;
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sub round {
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return int(0.5 + shift);
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}
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sub max {
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my ($a, $b) = @_;
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return $a > $b ? $a : $b;
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}
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sub excerpt {
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my $lines = shift;
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my @tmp;
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my ($n, $idx, $cur) = (0, 0, -1);
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open (my $fh, "-|", "amused", "show", "-p");
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while (<$fh>) {
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chomp;
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s,$trim,,;
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$tmp[$idx] = $_;
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if (m/^>/) {
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$cur = $n;
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$current_song = s/^> //r;
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}
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$n++;
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$idx = ++$idx % $lines;
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last if $cur != -1 && $n - $cur > int($lines/2) &&
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$#tmp == $lines-1;
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}
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close($fh);
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return ("Empty playlist.") unless @tmp;
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# reorder the entries
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my @r;
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my $len = $#tmp + 1;
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$idx = $idx % $len;
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for (1..$len) {
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push @r, $tmp[$idx];
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$idx = ++$idx % $len;
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}
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return @r;
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}
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sub playlist_numbers {
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my ($cur, $tot, $found) = (0, 0, 0);
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open (my $fh, "-|", "amused", "show", "-p");
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while (<$fh>) {
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$tot++;
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$cur++ unless $found;
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$found = 1 if m/^>/;
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}
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close($fh);
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return ($cur, $tot);
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}
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sub status {
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my ($pos, $dur, $mode);
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open (my $fh, "-|", "amused", "status", "-f",
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"status,time:raw,mode:oneline");
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<$fh> =~ m/([a-z]+) (.*)/;
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my ($status, $current_song) = ($1, $2);
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while (<$fh>) {
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chomp;
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$pos = s/position //r if m/^position /;
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$dur = s/duration //r if m/^duration /;
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$mode = $_ if m/^repeat/;
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}
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close($fh);
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return ($status, $current_song, $pos, $dur, $mode);
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}
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sub showtime {
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my $seconds = shift;
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my $str = "";
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if ($seconds > 3600) {
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my $hours = int($seconds / 3600);
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$seconds -= $hours * 3600;
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$str = sprintf("%02d:", $hours);
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}
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my $minutes = int($seconds / 60);
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$seconds -= $minutes * 60;
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$str .= sprintf "%02d:%02d", $minutes, $seconds;
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return $str;
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}
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sub center {
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my ($str, $pstr) = @_;
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my $width = mbswidth($str);
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return $str if $width > $COLS;
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my $pre = round(($COLS - $width) / 2);
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my $lpad = $pstr x $pre;
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my $rpad = $pstr x ($COLS - $width - $pre);
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return ($lpad, $str, $rpad);
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}
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sub offsets {
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my ($y, $x, $cur, $max) = @_;
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my ($pre, $c, $post) = center(" $cur / $max ", '-');
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addstring $y, $x, "";
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my $p = COLOR_PAIR($pair_n);
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attron $p;
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addstring $pre;
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attroff $p;
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addstring $c;
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attron $p;
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addstring $post;
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attroff $p;
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}
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sub progress {
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my ($y, $x, $pos, $dur) = @_;
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my $pstr = showtime $pos;
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my $dstr = showtime $dur;
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my $len = $COLS - length($pstr) - length($dstr) - 4;
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return if $len <= 0 or $dur <= 0;
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my $filled = round($pos * $len / $dur);
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addstring $y, $x, "$pstr [";
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addstring "#" x $filled;
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addstring " " x max($len - $filled, 0);
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addstring "] $dstr";
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}
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sub show_status {
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my ($y, $x, $status) = @_;
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my ($pre, $c, $post) = center($status, ' ');
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addstring $y, $x, $pre;
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addstring $c;
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addstring $post;
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}
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sub show_mode {
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my ($y, $x, $mode) = @_;
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my ($pre, $c, $post) = center($mode, ' ');
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addstring $y, $x, $pre;
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addstring $c;
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addstring $post;
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}
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sub render {
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erase;
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if ($LINES < 4 || $COLS < 20) {
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addstring "window too small";
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refresh;
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return;
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}
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my $song_pad = "";
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my $longest = 0;
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$longest = max $longest, length($_) foreach @songs;
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if ($longest < $COLS) {
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$song_pad = " " x (($COLS - $longest)/2);
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}
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my $line = 0;
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map {
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attron(A_BOLD) if m/^>/;
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addstring $line++, 0, $song_pad . $_;
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standend;
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} @songs;
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offsets $LINES - 4, 0, $playlist_cur, $playlist_max;
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progress $LINES - 3, 0, $time_cur, $time_dur;
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show_status $LINES - 2, 0, "$status $current_song";
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show_mode $LINES - 1, 0, $mode;
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refresh;
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}
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sub getsongs {
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$last_lines = $LINES;
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@songs = excerpt $LINES - 4;
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}
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sub getnums {
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($playlist_cur, $playlist_max) = playlist_numbers;
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}
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sub save {
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return unless defined $pfile;
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open(my $fh, ">", $pfile);
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open(my $ph, "-|", "amused", "show", "-p");
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print $fh $_ while (<$ph>);
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}
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sub hevent {
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my $fh = shift;
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my $l = <$fh>;
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die "monitor quit" unless defined($l);
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$status = "playing" if $l =~ m/^play/;
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$status = "paused" if $l =~ m/^pause/;
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$status = "stopped" if $l =~ m/^stop/;
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($time_cur, $time_dur) = ($1, $2) if $l =~ m/^seek (\d+) (\d+)/;
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$mode = $1 if $l =~ m/^mode (.*)/;
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getnums if $l =~ m/load|jump|next|prev/;
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getsongs if $l =~ m/load|jump|next|prev/;
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}
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sub hinput {
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my ($ch, $key) = getchar;
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if (defined $key) {
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if ($key == KEY_BACKSPACE) {
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system "amused", "seek", "0";
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}
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} elsif (defined $ch) {
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if ($ch eq " ") {
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system "amused", "toggle";
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} elsif ($ch eq "<" or $ch eq "p") {
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system "amused", "prev";
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} elsif ($ch eq ">" or $ch eq "n") {
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system "amused", "next";
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} elsif ($ch eq ",") {
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system "amused", "seek", "-5";
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} elsif ($ch eq ".") {
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system "amused", "seek", "+5";
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} elsif ($ch eq "S") {
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system "amused show | sort -u | amused load";
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} elsif ($ch eq "R") {
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system "amused show | sort -R | amused load";
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} elsif ($ch eq "s") {
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save;
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} elsif ($ch eq "q") {
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$run = 0;
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} elsif ($ch eq "\cH") {
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system "amused", "seek", "0"
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}
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}
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}
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GetOptions(
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"p:s" => \$pfile,
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"t:s" => \$trim,
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) or pod2usage(1);
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my $mpid = open(my $monitor, "-|", "amused", "monitor")
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or die "can't spawn amused monitor";
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setlocale(LC_ALL, "");
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initscr;
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start_color;
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use_default_colors;
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init_pair $pair_n, 250, -1;
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timeout 1000;
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scrollok 0;
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curs_set 0;
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keypad 1;
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my $poll = IO::Poll->new();
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$poll->mask(\*STDIN => POLLIN);
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$poll->mask($monitor => POLLIN);
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if (`uname` =~ "OpenBSD") {
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use OpenBSD::Pledge;
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use OpenBSD::Unveil;
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my $prog = `which amused`;
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chomp $prog;
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unveil($prog, 'rx') or die "unveil $prog: $!";
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if (defined($pfile)) {
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unveil($pfile, 'wc') or die "unveil $pfile: $!";
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pledge qw(stdio wpath cpath tty proc exec) or die "pledge: $!";
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} else {
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pledge qw(stdio tty proc exec) or die "pledge: $!";
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}
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}
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getsongs;
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getnums;
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($status, $current_song, $time_cur, $time_dur, $mode) = status;
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render;
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while ($run) {
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$poll->poll();
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hinput if $poll->events(\*STDIN) & POLLIN;
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hevent $monitor if $poll->events($monitor) & POLLIN;
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getsongs if $LINES != $last_lines;
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render;
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}
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endwin;
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save;
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kill 'INT', $mpid;
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wait;
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__END__
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=pod
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=head1 NAME
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amused-monitor - curses interface for amused(1)
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=head1 SYNOPSIS
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B<amused-monitor> [B<-p> I<playlist>] [B<-t> I<string>]
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=head1 DESCRIPTION
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amused-monitor is a simple curses interface for amused(1).
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The following options are available:
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=over 12
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=item B<-p> I<playlist>
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Save the current playling queue to the file I<playlist> upon exit or
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I<s> key.
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=item B<-t> I<string>
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Trim out the given I<string> from every song in the playlist view.
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=back
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The following key-bindings are available:
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=over 8
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=item backspace or C-h
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Seek back to the beginning of the track.
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=item space
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Toggle play/pause.
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=item < or p
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Play previous song.
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=item > or n
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Play next song.
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=item ,
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Seek backward by five seconds.
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=item .
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Seek forward by five seconds.
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=item R
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Randomize the playlist.
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=item S
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Sort the playlist.
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=item s
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Save the status to the file given with the B<-p> flag.
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=item q
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Quit.
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=back
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=head1 SEE ALSO
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amused(1)
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=cut
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