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#!/usr/bin/perl

#- Copyright (C) 2005 Mandrakesoft

use strict;
use warnings;

BEGIN { #- set up a safe path and environment
    $ENV{PATH} = "/bin:/usr/bin:/usr/X11R6/bin";
    delete @ENV{qw(ENV BASH_ENV IFS CDPATH)};
}

#- This is needed because text printed by Gtk2 will always be encoded
#- in UTF-8; we first check if LC_ALL is defined, because if it is,
#- changing only LC_COLLATE will have no effect.
use POSIX qw(setlocale LC_ALL LC_COLLATE);
use locale;
BEGIN {
    my $collation_locale = $ENV{LC_ALL};
    if ($collation_locale) {
	$collation_locale =~ /UTF-8/ or setlocale(LC_ALL, "$collation_locale.UTF-8");
    } else {
	$collation_locale = setlocale(LC_COLLATE);
	$collation_locale =~ /UTF-8/ or setlocale(LC_COLLATE, "$collation_locale.UTF-8");
    }
}

use urpm;
use urpm::msg qw(N);
use Gtk2;
use MDK::Common qw(partition);

sub usage () {
    print STDERR <<USAGE;
gurpmi version $urpm::VERSION
Usage :
    gurpmi <rpm> [ <rpm>... ]
USAGE
    exit 0;
}

#- fatal gurpmi initialisation error (*not* fatal urpmi errors)
sub fatal { print STDERR "$_[0]\n"; exit 1 }

sub quit () { Gtk2->main_quit }

sub but ($) { "    $_[0]    " }

#- globals
my (@all_rpms, $srpms, $rpms);
my ($mainw, $mainbox);

#- Gtk2 helper functions

sub add_button_box {
    my ($vbox, @buttons) = @_;
    my $hbox = Gtk2::HButtonBox->new;
    $vbox->pack_start($hbox, 0, 0, 0);
    $hbox->set_layout('edge');
    $_->set_alignment(0.5, 0.5), $hbox->add($_) foreach @buttons;
}

sub new_label {
    my ($msg) = @_;
    my $label = Gtk2::Label->new($msg);
    $label->set_line_wrap(1);
    $label->set_alignment(0.5, 0.5);
    if (($msg =~ tr/\n/\n/) > 5) {
	my $sw = Gtk2::ScrolledWindow->new;
	$sw->set_policy('never', 'automatic');
	$sw->add_with_viewport($label);
	$sw->set_size_request(-1,200);
	return $sw;
    } else {
	return $label;
    }
}

#- Parse command line
foreach (@ARGV) {
    if (/^-/) {
	/^--?[hv?]/ and usage;
	fatal N("Unknown option %s", $_);
    }
    push @all_rpms, $_;
}
@all_rpms or fatal N("No packages specified");

#- Now, the graphical stuff.

Gtk2->init;

#- Create main window

$mainw = Gtk2::Window->new('toplevel');
$mainw->set_border_width(3);
$mainw->set_title(N("RPM installation"));
$mainw->signal_connect(destroy => \&quit);
$mainw->set_position('center');
$mainw->set_modal(0);
$mainbox = Gtk2::VBox->new(0, 5);
$mainw->add($mainbox);

#- Ask question: save or install ?
#- change depending on the number of rpms, and on the presence of srpms
($srpms, $rpms) = partition { /\.src\.rpm$/ } @all_rpms;
{
    my $msg = (
	@$srpms > 0
	? N("You have selected a source package:

%s

You probably didn't want to install it on your computer (installing it would allow you to make modifications to its sourcecode then compile it).

What would you like to do?", $srpms->[0])
	: @all_rpms == 1
	? N("You are about to install the following software package on your computer:

%s

You may prefer to just save it. What is your choice?", $rpms->[0])
	: N("You are about to install the following software packages on your computer:

%s

Proceed?", join "\n", @all_rpms)
    );
    $mainbox->pack_start(new_label($msg), 1, 1, 0);
}

{   #- buttons
    my $inst_button = Gtk2::Button->new(but N("_Install"));
    my $save_button = @all_rpms == 1 ? Gtk2::Button->new(but N("_Save")) : undef;
    my $ccel_button = Gtk2::Button->new(but N("_Cancel"));

    $inst_button->signal_connect(clicked => sub {
	#- performs installation.
	quit;
	#- we need to switch to root if we're not already (via consolehelper)
	#- yes. hardcoded paths. safe.
	exec $> ? '/usr/bin/gurpmi2' : '/usr/sbin/gurpmi2', @ARGV;
    });
    $save_button and $save_button->signal_connect(clicked => sub {
	my $file_dialog = Gtk2::FileSelection->new(N("Choose location to save file"));
	$file_dialog->set_modal(1);
	$file_dialog->set_position('center');
	$file_dialog->set_filename($rpms->[0]); #- TODO must work for srpms too
	$file_dialog->hide_fileop_buttons;
	$file_dialog->ok_button->signal_connect(clicked => sub {
	    my $location = $file_dialog->get_filename;
	    quit;
	    $location and exec '/bin/mv', '-f', $rpms->[0], $location;
	});
	$file_dialog->cancel_button->signal_connect(clicked => \&quit);
	$file_dialog->show;
    });
    $ccel_button->signal_connect(clicked => \&quit);
    add_button_box($mainbox, grep { defined $_ } $inst_button, $save_button, $ccel_button);
}

$mainw->show_all;
Gtk2->main;