#!/usr/bin/perl
# DrakxDM -- Display Manager chooser
# Copyright (C) 2003 MandrakeSoft (tvignaud@mandrakesoft.com)
#
# 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, 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.

use strict;
use lib qw(/usr/lib/libDrakX);

use standalone;     #- warning, standalone must be loaded very first, for 'explanations'
use common;
use any;
use interactive;
use services;

my $in = 'interactive'->vnew('su');

my $cfg_file = '/etc/sysconfig/desktop';

my %dm = ('GNOME' => [ 'GDM (GNOME Display Manager)', '/usr/bin/gdm', 'gdm' ],
          'KDM'   => [ 'KDM (KDE Display Manager)', '/usr/bin/kdm', 'kdebase-kdm' ],
          'KDE'   => [ 'MdkKDM (Mandrake Display Manager)', '/usr/bin/mdkkdm', 'mdkkdm' ],
          'XDM'   => [ 'XDM (X Display Manager)', '/usr/bin/X11/xdm', 'XFree86' ],
          );

my $dm;

foreach (cat_($cfg_file)) {
    $dm = uc($1) if /^DISPLAYMANAGER=(.*)$/; 
}

if (!$dm) {
    $dm = 'KDE';
    log::explanations("Defaulting to $dm for display manager")
}

my @raw_list = sort keys %dm;
my @list = $::expert ? @raw_list : (grep { -e $dm{$_}->[1] } @raw_list) or @raw_list;

start:
if ($in->ask_from(N("Choosing a display manager"),
                               formatAlaTeX(N("X11 Display Manager allows you to graphically log
into your system with the X Window System running and supports running
several different X sessions on your local machine at the same time.")),
                               [
                                {
                                 allow_empty_list => 1,
                                 list => \@list,
                                 val => \$dm,
                                 type => 'list',
                                 format => sub { $dm{$_[0]}[0] },
                                 sort => 1,
                                }
                               ]
                              )
   ) {
    ! -x $dm{$dm}[1] and do { $in->do_pkgs->ensure_is_installed($dm{$dm}[2], $dm{$dm}[1]) or goto start };
    substInFile {
        s/^(DISPLAYMANAGER)=.*(\n|)//;
        s/^\n//g;
        $_ .= "\nDISPLAYMANAGER=$dm\n" if eof;
    } $cfg_file;
    log::explanations("Switching to \"$dm\" display manager");
    if (any::running_window_manager()) {
        $in->ask_okcancel('', N("The change is done, do you want to restart the dm service ?"), 1) and services::restart("dm");
    }
}

$in->exit(0);