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package Term::Complete;
require 5.000;
require Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(Complete);
# @(#)complete.pl,v1.1 (me@anywhere.EBay.Sun.COM) 09/23/91
=head1 NAME
Term::Complete - Perl word completion module
=head1 SYNOPSIS
$input = complete('prompt_string', \@completion_list);
$input = complete('prompt_string', @completion_list);
=head1 DESCRIPTION
This routine provides word completion on the list of words in
the array (or array ref).
The tty driver is put into raw mode using the system command
C<stty raw -echo> and restored using C<stty -raw echo>.
The following command characters are defined:
=over 4
=item E<lt>tabE<gt>
Attempts word completion.
Cannot be changed.
=item ^D
Prints completion list.
Defined by I<$Term::Complete::complete>.
=item ^U
Erases the current input.
Defined by I<$Term::Complete::kill>.
=item E<lt>delE<gt>, E<lt>bsE<gt>
Erases one character.
Defined by I<$Term::Complete::erase1> and I<$Term::Complete::erase2>.
=back
=head1 DIAGNOSTICS
Bell sounds when word completion fails.
=head1 BUGS
The completion charater E<lt>tabE<gt> cannot be changed.
=head1 AUTHOR
Wayne Thompson
=cut
CONFIG: {
$complete = "\004";
$kill = "\025";
$erase1 = "\177";
$erase2 = "\010";
}
sub Complete {
my($prompt, @cmp_list, $return, @match, $l, $test, $cmp, $r);
$prompt = shift;
if (ref $_[0] || $_[0] =~ /^\*/) {
@cmp_lst = sort @{$_[0]};
}
else {
@cmp_lst = sort(@_);
}
system('stty raw -echo');
LOOP: {
print($prompt, $return);
while (($_ = getc(STDIN)) ne "\r") {
CASE: {
# (TAB) attempt completion
$_ eq "\t" && do {
@match = grep(/^$return/, @cmp_lst);
$l = length($test = shift(@match));
unless ($#match < 0) {
foreach $cmp (@match) {
until (substr($cmp, 0, $l) eq substr($test, 0, $l)) {
$l--;
}
}
print("\a");
}
print($test = substr($test, $r, $l - $r));
$r = length($return .= $test);
last CASE;
};
# (^D) completion list
$_ eq $complete && do {
print(join("\r\n", '', grep(/^$return/, @cmp_lst)), "\r\n");
redo LOOP;
};
# (^U) kill
$_ eq $kill && do {
if ($r) {
undef $r;
undef $return;
print("\r\n");
redo LOOP;
}
last CASE;
};
# (DEL) || (BS) erase
($_ eq $erase1 || $_ eq $erase2) && do {
if($r) {
print("\b \b");
chop($return);
$r--;
}
last CASE;
};
# printable char
ord >= 32 && do {
$return .= $_;
$r++;
print;
last CASE;
};
}
}
}
system('stty -raw echo');
print("\n");
$return;
}
1;
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