473 lines
17 KiB
Perl
Executable File
473 lines
17 KiB
Perl
Executable File
#!/usr/bin/env perl
|
||
# vim:ts=4:sw=4:expandtab
|
||
#
|
||
# © 2012 Michael Stapelberg
|
||
#
|
||
# No dependencies except for perl ≥ v5.10
|
||
|
||
use strict;
|
||
use warnings;
|
||
use Data::Dumper;
|
||
use IPC::Open2;
|
||
use POSIX qw(locale_h);
|
||
use File::Find;
|
||
use File::Basename qw(basename);
|
||
use File::Temp qw(tempfile);
|
||
use Getopt::Long;
|
||
use Pod::Usage;
|
||
use v5.10;
|
||
use utf8;
|
||
use open ':encoding(utf8)';
|
||
|
||
binmode STDOUT, ':utf8';
|
||
binmode STDERR, ':utf8';
|
||
|
||
# reads in a whole file
|
||
sub slurp {
|
||
open(my $fh, '<', shift) or die "$!";
|
||
local $/;
|
||
<$fh>;
|
||
}
|
||
|
||
my $entry_type = 'both';
|
||
my $dmenu_cmd = 'dmenu -i';
|
||
my $result = GetOptions(
|
||
'dmenu=s' => \$dmenu_cmd,
|
||
'entry-type=s' => \$entry_type,
|
||
'version' => sub {
|
||
say "dmenu-desktop 1.3 © 2012 Michael Stapelberg";
|
||
exit 0;
|
||
},
|
||
'help' => sub {
|
||
pod2usage(-exitval => 0);
|
||
});
|
||
|
||
die "Could not parse command line options" unless $result;
|
||
|
||
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
|
||
# ┃ Convert LC_MESSAGES into an ordered list of suffixes to search for in the ┃
|
||
# ┃ .desktop files (e.g. “Name[de_DE@euro]” for LC_MESSAGES=de_DE.UTF-8@euro ┃
|
||
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
|
||
|
||
# For details on how the transformation of LC_MESSAGES to a list of keys that
|
||
# should be looked up works, refer to “Localized values for keys” of the
|
||
# “Desktop Entry Specification”:
|
||
# http://standards.freedesktop.org/desktop-entry-spec/latest/ar01s04.html
|
||
my $lc_messages = setlocale(LC_MESSAGES);
|
||
|
||
# Ignore the encoding (e.g. .UTF-8)
|
||
$lc_messages =~ s/\.[^@]+//g;
|
||
|
||
my @suffixes = ($lc_messages);
|
||
|
||
# _COUNTRY and @MODIFIER are present
|
||
if ($lc_messages =~ /_[^@]+@/) {
|
||
my $no_modifier = $lc_messages;
|
||
$no_modifier =~ s/@.*//g;
|
||
push @suffixes, $no_modifier;
|
||
|
||
my $no_country = $lc_messages;
|
||
$no_country =~ s/_[^@]+//g;
|
||
push @suffixes, $no_country;
|
||
}
|
||
|
||
# Strip _COUNTRY and @MODIFIER if present
|
||
$lc_messages =~ s/[_@].*//g;
|
||
push @suffixes, $lc_messages;
|
||
|
||
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
|
||
# ┃ Read all .desktop files and store the values in which we are interested. ┃
|
||
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
|
||
|
||
my %desktops;
|
||
# See http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables
|
||
my $xdg_data_home = $ENV{XDG_DATA_HOME};
|
||
$xdg_data_home = $ENV{HOME} . '/.local/share' if
|
||
!defined($xdg_data_home) ||
|
||
$xdg_data_home eq '' ||
|
||
! -d $xdg_data_home;
|
||
|
||
my $xdg_data_dirs = $ENV{XDG_DATA_DIRS};
|
||
$xdg_data_dirs = '/usr/local/share/:/usr/share/' if
|
||
!defined($xdg_data_dirs) ||
|
||
$xdg_data_dirs eq '';
|
||
|
||
my @searchdirs = ("$xdg_data_home/applications/");
|
||
for my $dir (split(':', $xdg_data_dirs)) {
|
||
push @searchdirs, "$dir/applications/";
|
||
}
|
||
|
||
# Cleanup the paths, maybe some application does not cope with double slashes
|
||
# (the field code %k is replaced with the .desktop file location).
|
||
@searchdirs = map { s,//,/,g; $_ } @searchdirs;
|
||
|
||
# To avoid errors by File::Find’s find(), only pass existing directories.
|
||
@searchdirs = grep { -d $_ } @searchdirs;
|
||
|
||
find(
|
||
{
|
||
wanted => sub {
|
||
return unless substr($_, -1 * length('.desktop')) eq '.desktop';
|
||
my $relative = $File::Find::name;
|
||
|
||
# + 1 for the trailing /, which is missing in ::topdir.
|
||
substr($relative, 0, length($File::Find::topdir) + 1) = '';
|
||
|
||
# Don’t overwrite files with the same relative path, we search in
|
||
# descending order of importance.
|
||
return if exists($desktops{$relative});
|
||
|
||
$desktops{$relative} = $File::Find::name;
|
||
},
|
||
no_chdir => 1,
|
||
},
|
||
@searchdirs
|
||
);
|
||
|
||
my %apps;
|
||
|
||
for my $file (values %desktops) {
|
||
my $base = basename($file);
|
||
|
||
# _ is an invalid character for a key, so we can use it for our own keys.
|
||
$apps{$base}->{_Location} = $file;
|
||
|
||
# Extract all “Name” and “Exec” keys from the [Desktop Entry] group
|
||
# and store them in $apps{$base}.
|
||
my %names;
|
||
my @lines = split("\n", slurp($file));
|
||
for my $line (@lines) {
|
||
my $first = substr($line, 0, 1);
|
||
next if $line eq '' || $first eq '#';
|
||
next unless ($line eq '[Desktop Entry]' ..
|
||
($first eq '[' &&
|
||
substr($line, -1) eq ']' &&
|
||
$line ne '[Desktop Entry]'));
|
||
next if $first eq '[';
|
||
|
||
my ($key, $value) = ($line =~ /^
|
||
(
|
||
[A-Za-z0-9-]+ # the spec specifies these as valid key characters
|
||
(?:\[[^]]+\])? # possibly, there as a locale suffix
|
||
)
|
||
\s* = \s* # whitespace around = should be ignored
|
||
(.*) # no restrictions on the values
|
||
$/x);
|
||
|
||
if ($key =~ /^Name/) {
|
||
$names{$key} = $value;
|
||
} elsif ($key eq 'Exec' ||
|
||
$key eq 'TryExec' ||
|
||
$key eq 'Type') {
|
||
$apps{$base}->{$key} = $value;
|
||
} elsif ($key eq 'NoDisplay' ||
|
||
$key eq 'Hidden' ||
|
||
$key eq 'StartupNotify' ||
|
||
$key eq 'Terminal') {
|
||
# Values of type boolean must either be string true or false,
|
||
# see “Possible value types”:
|
||
# http://standards.freedesktop.org/desktop-entry-spec/latest/ar01s03.html
|
||
$apps{$base}->{$key} = ($value eq 'true');
|
||
}
|
||
}
|
||
|
||
for my $suffix (@suffixes) {
|
||
next unless exists($names{"Name[$suffix]"});
|
||
$apps{$base}->{Name} = $names{"Name[$suffix]"};
|
||
last;
|
||
}
|
||
|
||
# Fallback to unlocalized “Name”.
|
||
$apps{$base}->{Name} = $names{Name} unless exists($apps{$base}->{Name});
|
||
}
|
||
|
||
# %apps now looks like this:
|
||
#
|
||
# %apps = {
|
||
# 'evince.desktop' => {
|
||
# 'Exec' => 'evince %U',
|
||
# 'Name' => 'Dokumentenbetrachter',
|
||
# '_Location' => '/usr/share/applications/evince.desktop'
|
||
# },
|
||
# 'gedit.desktop' => {
|
||
# 'Exec' => 'gedit %U',
|
||
# 'Name' => 'gedit',
|
||
# '_Location' => '/usr/share/applications/gedit.desktop'
|
||
# }
|
||
# };
|
||
|
||
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
|
||
# ┃ Turn %apps inside out to provide Name → filename lookup. ┃
|
||
# ┃ The Name is what we display in dmenu later. ┃
|
||
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
|
||
|
||
my %choices;
|
||
for my $app (keys %apps) {
|
||
my $name = $apps{$app}->{Name};
|
||
|
||
# Don’t try to use .desktop files which don’t have Type=application
|
||
next if (!exists($apps{$app}->{Type}) ||
|
||
$apps{$app}->{Type} ne 'Application');
|
||
|
||
# Don’t offer apps which have NoDisplay == true or Hidden == true.
|
||
# See http://wiki.xfce.org/howto/customize-menu#hide_menu_entries
|
||
# for the difference between NoDisplay and Hidden.
|
||
next if (exists($apps{$app}->{NoDisplay}) && $apps{$app}->{NoDisplay}) ||
|
||
(exists($apps{$app}->{Hidden}) && $apps{$app}->{Hidden});
|
||
|
||
if (exists($apps{$app}->{TryExec})) {
|
||
my $tryexec = $apps{$app}->{TryExec};
|
||
if (substr($tryexec, 0, 1) eq '/') {
|
||
# Skip if absolute path is not executable.
|
||
next unless -x $tryexec;
|
||
} else {
|
||
# Search in $PATH for the executable.
|
||
my $found = 0;
|
||
for my $path (split(':', $ENV{PATH})) {
|
||
next unless -x "$path/$tryexec";
|
||
$found = 1;
|
||
last;
|
||
}
|
||
next unless $found;
|
||
}
|
||
}
|
||
|
||
if ($entry_type eq 'name' || $entry_type eq 'both') {
|
||
if (exists($choices{$name})) {
|
||
# There are two .desktop files which contain the same “Name” value.
|
||
# I’m not sure if that is allowed to happen, but we disambiguate the
|
||
# situation by appending “ (2)”, “ (3)”, etc. to the name.
|
||
#
|
||
# An example of this happening is exo-file-manager.desktop and
|
||
# thunar-settings.desktop, both of which contain “Name=File Manager”.
|
||
my $inc = 2;
|
||
$inc++ while exists($choices{"$name ($inc)"});
|
||
$name = "$name ($inc)";
|
||
}
|
||
|
||
$choices{$name} = $app;
|
||
}
|
||
|
||
if ($entry_type eq 'command' || $entry_type eq 'both') {
|
||
my ($command) = split(' ', $apps{$app}->{Exec});
|
||
|
||
# Don’t add “geany” if “Geany” is already present.
|
||
my @keys = map { lc } keys %choices;
|
||
next if lc(basename($command)) ~~ @keys;
|
||
|
||
$choices{basename($command)} = $app;
|
||
}
|
||
}
|
||
|
||
# %choices now looks like this:
|
||
#
|
||
# %choices = {
|
||
# 'Dokumentenbetrachter' => 'evince.desktop',
|
||
# 'gedit' => 'gedit.desktop'
|
||
# };
|
||
|
||
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
|
||
# ┃ Run dmenu to ask the user for her choice ┃
|
||
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
|
||
|
||
# open2 will just make dmenu’s STDERR go to our own STDERR.
|
||
my ($dmenu_out, $dmenu_in);
|
||
my $pid = open2($dmenu_out, $dmenu_in, $dmenu_cmd);
|
||
binmode $dmenu_in, ':utf8';
|
||
binmode $dmenu_out, ':utf8';
|
||
|
||
# Feed dmenu the possible choices.
|
||
say $dmenu_in $_ for sort keys %choices;
|
||
close($dmenu_in);
|
||
|
||
waitpid($pid, 0);
|
||
my $status = ($? >> 8);
|
||
|
||
# Pass on dmenu’s exit status if there was an error.
|
||
exit $status unless $status == 0;
|
||
|
||
my $choice = <$dmenu_out>;
|
||
my $app;
|
||
# Exact match: the user chose “Avidemux (GTK+)”
|
||
if (exists($choices{$choice})) {
|
||
$app = $apps{$choices{$choice}};
|
||
$choice = '';
|
||
} else {
|
||
# Not an exact match: the user entered “Avidemux (GTK+) ~/movie.mp4”
|
||
for my $possibility (keys %choices) {
|
||
next unless substr($choice, 0, length($possibility)) eq $possibility;
|
||
$app = $apps{$choices{$possibility}};
|
||
substr($choice, 0, length($possibility)) = '';
|
||
# Remove whitespace separating the entry and arguments.
|
||
$choice =~ s/^\s//g;
|
||
last;
|
||
}
|
||
if (!defined($app)) {
|
||
die "Invalid input: “$choice” does not match any application.";
|
||
}
|
||
}
|
||
|
||
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
|
||
# ┃ Make i3 start the chosen application. ┃
|
||
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
|
||
|
||
my $name = $app->{Name};
|
||
my $exec = $app->{Exec};
|
||
my $location = $app->{_Location};
|
||
|
||
# Quote as described by “The Exec key”:
|
||
# http://standards.freedesktop.org/desktop-entry-spec/latest/ar01s06.html
|
||
sub quote {
|
||
my ($str) = @_;
|
||
$str =~ s/("|`|\$|\\)/\\$1/g;
|
||
$str = qq|"$str"| if $str ne "";
|
||
return $str;
|
||
}
|
||
|
||
$choice = quote($choice);
|
||
$location = quote($location);
|
||
|
||
# Remove deprecated field codes, as the spec dictates.
|
||
$exec =~ s/%[dDnNvm]//g;
|
||
|
||
# Replace filename field codes with the rest of the command line.
|
||
# Note that we assume the user uses precisely one file name,
|
||
# not multiple file names.
|
||
$exec =~ s/%[fF]/$choice/g;
|
||
|
||
# If the program works with URLs,
|
||
# we assume the user provided a URL instead of a filename.
|
||
# As per the spec, there must be at most one of %f, %u, %F or %U present.
|
||
$exec =~ s/%[uU]/$choice/g;
|
||
|
||
# The translated name of the application.
|
||
$exec =~ s/%c/$name/g;
|
||
|
||
# XXX: Icons are not implemented. Is the complexity (looking up the path if
|
||
# only a name is given) actually worth it?
|
||
#$exec =~ s/%i/--icon $icon/g;
|
||
|
||
# location of .desktop file
|
||
$exec =~ s/%k/$location/g;
|
||
|
||
# Literal % characters are represented as %%.
|
||
$exec =~ s/%%/%/g;
|
||
|
||
my $nosn = '';
|
||
my $cmd;
|
||
if (exists($app->{Terminal}) && $app->{Terminal}) {
|
||
# For applications which specify “Terminal=true” (e.g. htop.desktop),
|
||
# we need to create a temporary script that contains the full command line
|
||
# as the syntax for starting commands with arguments varies from terminal
|
||
# emulator to terminal emulator.
|
||
# Then, we launch that script with i3-sensible-terminal.
|
||
my ($fh, $filename) = tempfile();
|
||
binmode($fh, ':utf8');
|
||
say $fh <<EOT;
|
||
#!/bin/sh
|
||
rm $filename
|
||
exec $exec
|
||
EOT
|
||
close($fh);
|
||
chmod 0755, $filename;
|
||
|
||
$cmd = qq|exec i3-sensible-terminal -e "$filename"|;
|
||
} else {
|
||
# i3 executes applications by passing the argument to i3’s “exec” command
|
||
# as-is to $SHELL -c. The i3 parser supports quoted strings: When a string
|
||
# starts with a double quote ("), everything is parsed as-is until the next
|
||
# double quote which is NOT preceded by a backslash (\).
|
||
#
|
||
# Therefore, we escape all double quotes (") by replacing them with \"
|
||
$exec =~ s/"/\\"/g;
|
||
|
||
if (exists($app->{StartupNotify}) && !$app->{StartupNotify}) {
|
||
$nosn = '--no-startup-id';
|
||
}
|
||
$cmd = qq|exec $nosn "$exec"|;
|
||
}
|
||
|
||
system('i3-msg', $cmd) == 0 or die "Could not launch i3-msg: $?";
|
||
|
||
=encoding utf-8
|
||
|
||
=head1 NAME
|
||
|
||
i3-dmenu-desktop - run .desktop files with dmenu
|
||
|
||
=head1 SYNOPSIS
|
||
|
||
i3-dmenu-desktop [--dmenu='dmenu -i'] [--entry-type=both]
|
||
|
||
=head1 DESCRIPTION
|
||
|
||
i3-dmenu-desktop is a script which extracts the (localized) name from
|
||
application .desktop files, offers the user a choice via dmenu(1) and then
|
||
starts the chosen application via i3 (for startup notification support).
|
||
The advantage of using .desktop files instead of dmenu_run(1) is that dmenu_run
|
||
offers B<all> binaries in your $PATH, including non-interactive utilities like
|
||
"sed". Also, .desktop files contain a proper name, information about whether
|
||
the application runs in a terminal and whether it supports startup
|
||
notifications.
|
||
|
||
The .desktop files are searched in $XDG_DATA_HOME/applications (by default
|
||
$HOME/.local/share/applications) and in the "applications" subdirectory of each
|
||
entry of $XDG_DATA_DIRS (by default /usr/local/share/:/usr/share/).
|
||
|
||
Files with the same name in $XDG_DATA_HOME/applications take precedence over
|
||
files in $XDG_DATA_DIRS, so that you can overwrite parts of the system-wide
|
||
.desktop files by copying them to your local directory and making changes.
|
||
|
||
i3-dmenu-desktop displays the "Name" value in the localized version depending
|
||
on LC_MESSAGES as specified in the Desktop Entry Specification.
|
||
|
||
You can pass a filename or URL (%f/%F and %u/%U field codes in the .desktop
|
||
file respectively) by appending it to the name of the application. E.g., if you
|
||
want to launch "GNU Emacs 24" with the patch /tmp/foobar.txt, you would type
|
||
"emacs", press TAB, type " /tmp/foobar.txt" and press ENTER.
|
||
|
||
.desktop files with Terminal=true are started using i3-sensible-terminal(1).
|
||
|
||
.desktop files with NoDisplay=true or Hidden=true are skipped.
|
||
|
||
UTF-8 is supported, of course, but dmenu does not support displaying all
|
||
glyphs. E.g., xfce4-terminal.desktop's Name[fi]=Pääte will be displayed just
|
||
fine, but not its Name[ru]=Терминал.
|
||
|
||
=head1 OPTIONS
|
||
|
||
=over
|
||
|
||
=item B<--dmenu=command>
|
||
|
||
Execute command instead of 'dmenu -i'. This option can be used to pass custom
|
||
parameters to dmenu, or to make i3-dmenu-desktop start a custom (patched?)
|
||
version of dmenu.
|
||
|
||
=item B<--entry-type=type>
|
||
|
||
Display the (localized) "Name" (type = name) or the command (type = command) or
|
||
both (type = both) in dmenu.
|
||
|
||
Examples are "GNU Image Manipulation Program" (type = name), "gimp" (type =
|
||
command) and both (type = both).
|
||
|
||
=back
|
||
|
||
=head1 VERSION
|
||
|
||
Version 1.3
|
||
|
||
=head1 AUTHOR
|
||
|
||
Michael Stapelberg, C<< <michael at i3wm.org> >>
|
||
|
||
=head1 LICENSE AND COPYRIGHT
|
||
|
||
Copyright 2012 Michael Stapelberg.
|
||
|
||
This program is free software; you can redistribute it and/or modify it
|
||
under the terms of the BSD license.
|
||
|
||
=cut
|