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#!/usr/bin/perl -w
=head1 NAME
Debconf::Element::Teletype::Boolean - Yes/No question
=cut
package Debconf::Element::Teletype::Boolean;
use strict;
use Debconf::Gettext;
use base qw(Debconf::Element);
=head1 DESCRIPTION
This is a yes or no question, presented to the user using a teletype
interface.
=head1 METHODS
=over 4
=cut
sub show {
my $this=shift;
my $y=gettext("yes");
my $n=gettext("no");
# Display the question's long desc first.
$this->frontend->display($this->question->extended_description."\n");
my $default='';
$default=$this->question->value if defined $this->question->value;
if ($default eq 'true') {
$default=$y;
}
elsif ($default eq 'false') {
$default=$n;
}
my $value='';
while (1) {
# Prompt for input.
$_=$this->frontend->prompt(
default => $default,
completions => [$y, $n],
prompt => $this->question->description,
question => $this->question,
);
return unless defined $_;
# Validate the input. Check to see if the first letter
# matches the start of "yes" or "no". Internationalization
# makes this harder, because there may be some language where
# "yes" and "no" both start with the same letter.
if (substr($y, 0, 1) ne substr($n, 0, 1)) {
# When possible, trim to first letters.
$y=substr($y, 0, 1);
$n=substr($n, 0, 1);
}
# I suppose this would break in a language where $y is a
# anchored substring of $n. Any such language should be taken
# out and shot. TODO: I hear Chinese actually needs this..
if (/^\Q$y\E/i) {
$value='true';
last;
}
elsif (/^\Q$n\E/i) {
$value='false';
last;
}
# As a fallback, check for unlocalised y or n. Perhaps the
# question was not fully translated and the user chose to
# answer in English.
if (/^y/i) {
$value='true';
last;
}
elsif (/^n/i) {
$value='false';
last;
}
}
$this->frontend->display("\n");
$this->value($value);
}
=back
=head1 AUTHOR
Joey Hess <joeyh@debian.org>
=cut
1
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