# vi: set autoindent shiftwidth=4 tabstop=8 softtabstop=4 expandtab:
package Devel::PDB::Dialog::FileBrowser;
use strict;
use warnings;

use Curses;
use Curses::UI::Window;
use Curses::UI::Common;

use vars qw(
    $VERSION 
    @ISA
);

@ISA = qw(
    Curses::UI::Window
    Curses::UI::Common
);

$VERSION = '1.0';

my $file_label = 'File:';
my $filter_label = 'Filter:';
my $dialog_title = 'File(s)';

sub new {
    my $class = shift;
    my %userargs = @_;

    keys_to_lowercase(\%userargs);

    my %args = ( 
        -title          => $dialog_title,
	-bg             => -1,
        -fg             => -1,

        %userargs,

        -border         => 1,
        -centered       => 1,
        -titleinverse   => 0,
        -ipad           => 1,
    );

    my $this = $class->SUPER::new(%args);
    $this->root->error('No files array is given') if !defined $this->{-files};
    $this->layout();

    my $filebrowser = $this->add(
        'filebrowser', 'Listbox',
        -y              => 0,
        -border         => 1,
        -width          => $this->canvaswidth,
        -padbottom      => 4,
        -values         => [],
        -vscrollbar     => 1,
        -bg             => $this->{-bg},
        -fg             => $this->{-fg},
        -bbg            => $this->{-bg},
        -bfg            => $this->{-fg},
        -onselchange    => \&on_file_active,
    );

    $filebrowser->set_routine('option-select', \&on_file_sel);

    $this->add(
        'filterlabel', 'Label',
        -x          => 1,
        -y          => $this->canvasheight - 4,
        -text       => $filter_label,
        -bg         => $this->{-bg},
        -fg         => $this->{-fg},
    );

    my $filter = $this->add(
        'filter', 'TextEntry',
        -x          => 10,
        -y          => $this->canvasheight - 4, 
        -text       => '',
        -width      => $this->canvaswidth - 11,
        -showlines  => 1,
        -bg         => $this->{-bg},
        -fg         => $this->{-fg},
    );

    $this->add(
        'filelabel', 'Label',
        -x          => 1,
        -y          => $this->canvasheight - 3, 
        -text       => $file_label,
        -bg         => $this->{-bg},
        -fg         => $this->{-fg},
    );

    $this->add(
        'file', 'Label',
        -x              => 10,
        -y              => $this->canvasheight - 3, 
        -width          => $this->canvaswidth - 11,
        -height         => 3,
        -text           => '',
        -bg             => $this->{-bg},
        -fg             => $this->{-fg},
    );


    $this->set_binding(sub {
        ($this->getfocusobj == $filter ? $filebrowser : $filter)->focus;
    }, CUI_TAB);

    $filter->onChange(sub {
        $this->refresh_list;
    });

    $this->set_binding(sub {
        shift->loose_focus;
    }, CUI_ESCAPE);

    $this->layout();
    $this->refresh_list;

    return bless $this, $class;
}

sub layout {
    my $this = shift;

    $this->{-width} = $this->root->{-width} - 10;
    $this->{-height} = $this->root->{-height} - 10;

    $this->SUPER::layout() or return;

    return $this;
}

sub refresh_list {
    my $this = shift;

    my $file = $this->getobj('file');
    my $browser = $this->getobj('filebrowser');
    my $filter = $this->getobj('filter');

    my @visible_files = sort @{$this->{-files}};
    my $regexp = $filter->text;
    eval {
        @visible_files = grep /$regexp/i, @visible_files if $regexp;
    };

    $browser->values(\@visible_files);
    $browser->{-ypos} = 0;
    $browser->{-selected} = undef;
    $browser->layout_content->draw(1);

    return $this;
}

sub on_file_active {
    my $browser = shift;
    my $this = $browser->parent;
    my $file = $this->getobj('file');
    my $active = $browser->get_active_value;
    my $width = $file->{-width};

    my $show = '';
    if (defined $active) {
        my $ptr = 0;
        my $len = length($active);
        for ($ptr = 0; $ptr < $len; $ptr += $width) {
            $show .= substr($active, $ptr, $width) . "\n";
        }
        $show .= substr $active, $ptr if $ptr < $len;
    }

    $file->text($show);
}

sub on_file_sel {
    my $browser = shift;
    my $this = $browser->parent;

    $this->{-file} = $browser->get_active_value;
    $this->loose_focus;
}

sub draw(;$)
{
    my $this = shift;
    my $no_doupdate = shift || 0;

    # Draw Window
    $this->SUPER::draw(1) or return $this;

    $this->{-canvasscr}->noutrefresh();
    doupdate() unless $no_doupdate;

    return $this;
}

sub get()
{
    return shift->{-file};
}

1;