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#!/usr/bin/perl
# Copyright © 2011 by Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# Authors: Peter Hutterer <peter.hutterer@redhat.com>
# Parser for xinput output
#
# Parses the output from git://anongit.freedesktoip.org/git/xorg/app/xinput
# and makes it available via various subs.
package xinput;
use InputDevice;
use warnings;
use strict;
# Instance methods
# Parameters:
# device: the device name of the device this instance should apply to
sub new {
my $class = shift;
my $self = {@_};
bless ($self, $class);
return $self;
}
# Run xinput list, collect output, save and return as array.
# Output is cached, calling list multiple times will not query the X Server
# again
sub _list {
my $self = shift;
my @output;
if (defined $self->{list_output}) {
return @{$self->{list_output}};
}
open XINPUT, "xinput list --long |";
@output = <XINPUT>;
$self->{list_output} = [@output];
$self->_parse_list(\@output);
return @output;
}
# Return True if the device is present in the xinput list output
# Arguments:
# The device name, if missing the internal device name is picked.
sub is_present {
my $self = shift;
my $device = shift;
$device = $self->{device} if (not defined $device);
my @devices = $self->get_devices;
for (@devices) {
return 1 if $_->name eq $device;
}
return 0;
}
# Parse xinput list output
# Arguments:
# array reference to xinput list output, otherwise internal output is
# taken
sub _parse_list {
my $self = shift;
my $ref = shift;
my @output;
my @devices;
my $current_master;
if (defined $ref) {
@output = @{$ref};
} else {
@output = $self->_list;
}
for my $line (@output) {
chomp $line;
my $type;
$type = InputDevice::TYPE_MASTER_POINTER if ($line =~ /⎡ /);
$type = InputDevice::TYPE_MASTER_KEYBOARD if ($line =~ /⎣ /);
$type = InputDevice::TYPE_FLOATING_SLAVE if ($line =~ /∼ /);
$type = InputDevice::TYPE_SLAVE if ($line =~ /[| ] ↳ /);
next if (not defined $type);
if ($line =~ / ([⎡⎣∼]|[| ] ↳)[ ] # first chars depend on type
([^ ]+) # device name
[ ]+ # separator tab
id=([0-9]+) # device ID, ignore the rest
/x) {
my $name = $2;
$name =~ s/^\s+|\s+$//g; # strip whitespace
my $dev = InputDevice->new(
name => $name,
id => $3,
type => $type,
);
if ($type == InputDevice::TYPE_MASTER_POINTER or
$type == InputDevice::TYPE_MASTER_KEYBOARD) {
$current_master = $dev;
} elsif ($type == InputDevice::TYPE_SLAVE) {
$dev->attachment($current_master);
}
push @devices, $dev;
} else {
# some other line, skip
}
}
@{$self->{devices}} = @devices;
}
# Return an array of InputDevices
sub get_devices {
my $self = shift;
$self->_list if (not defined $self->{devices});
return @{$self->{devices}};
}
# Return the number of devices
sub get_num_devices {
my $self = shift;
return scalar $self->get_devices;
}
# Return a string with all devices in some machine-readable format
sub print_tree {
my $self = shift;
my @devices = $self->get_devices;
my $str;
$str = "Devices in tree: ".scalar @devices."\n";
for my $i (0 ... scalar $#devices) {
next if $devices[$i]->attachment;
$str .= "{ ".$devices[$i]->name."\n";
for my $dev (@devices) {
next if not defined $dev->attachment;
if ($dev->attachment->name eq $devices[$i]->name) {
$str .= " {".$dev->name."}\n";
}
}
$str .= "}\n";
}
return $str;
}
1;
# vim: set noexpandtab shiftwidth=8 tabstop=8:
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