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1 | package Term::Complete; |
2 | require 5.000; |
3 | require Exporter; |
4 | |
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5 | use strict; |
6 | our @ISA = qw(Exporter); |
7 | our @EXPORT = qw(Complete); |
8 | our $VERSION = '1.2'; |
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9 | |
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10 | # @(#)complete.pl,v1.2 (me@anywhere.EBay.Sun.COM) 09/23/91 |
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11 | |
12 | =head1 NAME |
13 | |
14 | Term::Complete - Perl word completion module |
15 | |
16 | =head1 SYNOPSIS |
17 | |
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18 | $input = Complete('prompt_string', \@completion_list); |
19 | $input = Complete('prompt_string', @completion_list); |
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20 | |
21 | =head1 DESCRIPTION |
22 | |
23 | This routine provides word completion on the list of words in |
24 | the array (or array ref). |
25 | |
26 | The tty driver is put into raw mode using the system command |
27 | C<stty raw -echo> and restored using C<stty -raw echo>. |
28 | |
29 | The following command characters are defined: |
30 | |
31 | =over 4 |
32 | |
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33 | =item E<lt>tabE<gt> |
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34 | |
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35 | Attempts word completion. |
36 | Cannot be changed. |
37 | |
38 | =item ^D |
39 | |
40 | Prints completion list. |
41 | Defined by I<$Term::Complete::complete>. |
42 | |
43 | =item ^U |
44 | |
45 | Erases the current input. |
46 | Defined by I<$Term::Complete::kill>. |
47 | |
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48 | =item E<lt>delE<gt>, E<lt>bsE<gt> |
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49 | |
50 | Erases one character. |
51 | Defined by I<$Term::Complete::erase1> and I<$Term::Complete::erase2>. |
52 | |
53 | =back |
54 | |
55 | =head1 DIAGNOSTICS |
56 | |
57 | Bell sounds when word completion fails. |
58 | |
59 | =head1 BUGS |
60 | |
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61 | The completion character E<lt>tabE<gt> cannot be changed. |
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62 | |
63 | =head1 AUTHOR |
64 | |
65 | Wayne Thompson |
66 | |
67 | =cut |
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68 | |
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69 | our($complete, $kill, $erase1, $erase2); |
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70 | CONFIG: { |
71 | $complete = "\004"; |
72 | $kill = "\025"; |
73 | $erase1 = "\177"; |
74 | $erase2 = "\010"; |
75 | } |
76 | |
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77 | sub Complete { |
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78 | my($prompt, @cmp_lst, $cmp, $test, $l, @match); |
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79 | my ($return, $r) = ("", 0); |
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80 | |
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81 | $return = ""; |
82 | $r = 0; |
83 | |
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84 | $prompt = shift; |
85 | if (ref $_[0] || $_[0] =~ /^\*/) { |
86 | @cmp_lst = sort @{$_[0]}; |
87 | } |
88 | else { |
89 | @cmp_lst = sort(@_); |
90 | } |
91 | |
92 | system('stty raw -echo'); |
93 | LOOP: { |
94 | print($prompt, $return); |
95 | while (($_ = getc(STDIN)) ne "\r") { |
96 | CASE: { |
97 | # (TAB) attempt completion |
98 | $_ eq "\t" && do { |
99 | @match = grep(/^$return/, @cmp_lst); |
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100 | unless ($#match < 0) { |
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101 | $l = length($test = shift(@match)); |
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102 | foreach $cmp (@match) { |
103 | until (substr($cmp, 0, $l) eq substr($test, 0, $l)) { |
104 | $l--; |
105 | } |
106 | } |
107 | print("\a"); |
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108 | print($test = substr($test, $r, $l - $r)); |
109 | $r = length($return .= $test); |
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110 | } |
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111 | last CASE; |
112 | }; |
113 | |
114 | # (^D) completion list |
115 | $_ eq $complete && do { |
116 | print(join("\r\n", '', grep(/^$return/, @cmp_lst)), "\r\n"); |
117 | redo LOOP; |
118 | }; |
119 | |
120 | # (^U) kill |
121 | $_ eq $kill && do { |
122 | if ($r) { |
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123 | $r = 0; |
124 | $return = ""; |
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125 | print("\r\n"); |
126 | redo LOOP; |
127 | } |
128 | last CASE; |
129 | }; |
130 | |
131 | # (DEL) || (BS) erase |
132 | ($_ eq $erase1 || $_ eq $erase2) && do { |
133 | if($r) { |
134 | print("\b \b"); |
135 | chop($return); |
136 | $r--; |
137 | } |
138 | last CASE; |
139 | }; |
140 | |
141 | # printable char |
142 | ord >= 32 && do { |
143 | $return .= $_; |
144 | $r++; |
145 | print; |
146 | last CASE; |
147 | }; |
148 | } |
149 | } |
150 | } |
151 | system('stty -raw echo'); |
152 | print("\n"); |
153 | $return; |
154 | } |
155 | |
156 | 1; |
157 | |