1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
package Term::Complete;
require 5.000;
require Exporter;
use strict;
our @ISA = qw(Exporter);
our @EXPORT = qw(Complete);
our $VERSION = '1.402';
# @(#)complete.pl,v1.2 (me@anywhere.EBay.Sun.COM) 09/23/91
=head1 NAME
Term::Complete - Perl word completion module
=head1 SYNOPSIS
$input = Complete('prompt_string', \@completion_list);
$input = Complete('prompt_string', @completion_list);
=head1 DESCRIPTION
This routine provides word completion on the list of words in
the array (or array ref).
The tty driver is put into raw mode and restored using an operating
system specific command, in UNIX-like environments C<stty>.
The following command characters are defined:
=over 4
=item E<lt>tabE<gt>
Attempts word completion.
Cannot be changed.
=item ^D
Prints completion list.
Defined by I<$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<$Term::Complete::erase2>.
=back
=head1 DIAGNOSTICS
Bell sounds when word completion fails.
=head1 BUGS
The completion character E<lt>tabE<gt> cannot be changed.
=head1 AUTHOR
Wayne Thompson
=cut
our($complete, $kill, $erase1, $erase2, $tty_raw_noecho, $tty_restore, $stty, $tty_safe_restore);
our($tty_saved_state) = '';
CONFIG: {
$complete = "\004";
$kill = "\025";
$erase1 = "\177";
$erase2 = "\010";
foreach my $s (qw(/bin/stty /usr/bin/stty)) {
if (-x $s) {
$tty_raw_noecho = "$s raw -echo";
$tty_restore = "$s -raw echo";
$tty_safe_restore = $tty_restore;
$stty = $s;
last;
}
}
}
sub Complete {
my($prompt, @cmp_lst, $cmp, $test, $l, @match);
my ($return, $r) = ("", 0);
$return = "";
$r = 0;
$prompt = shift;
if (ref $_[0] || $_[0] =~ /^\*/) {
@cmp_lst = sort @{$_[0]};
}
else {
@cmp_lst = sort(@_);
}
# Attempt to save the current stty state, to be restored later
if (defined $stty && defined $tty_saved_state && $tty_saved_state eq '') {
$tty_saved_state = qx($stty -g 2>/dev/null);
if ($?) {
# stty -g not supported
$tty_saved_state = undef;
}
else {
$tty_saved_state =~ s/\s+$//g;
$tty_restore = qq($stty "$tty_saved_state" 2>/dev/null);
}
}
system $tty_raw_noecho if defined $tty_raw_noecho;
LOOP: {
local $_;
print($prompt, $return);
while (($_ = getc(STDIN)) ne "\r") {
CASE: {
# (TAB) attempt completion
$_ eq "\t" && do {
@match = grep(/^\Q$return/, @cmp_lst);
unless ($#match < 0) {
$l = length($test = shift(@match));
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 $complete && do {
print(join("\r\n", '', grep(/^\Q$return/, @cmp_lst)), "\r\n");
redo LOOP;
};
# (^U) kill
$_ eq $kill && do {
if ($r) {
$r = 0;
$return = "";
print("\r\n");
redo LOOP;
}
last CASE;
};
# (DEL) || (BS) erase
($_ 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 $tty_restore if defined $tty_restore;
if (defined $tty_saved_state && defined $tty_restore && defined $tty_safe_restore)
{
system $tty_restore;
if ($?) {
# tty_restore caused error
system $tty_safe_restore;
}
}
print("\n");
$return;
}
1;
|
