1 |
dpavlin |
12 |
package Term::ISelect; |
2 |
|
|
|
3 |
|
|
use warnings; |
4 |
|
|
use strict; |
5 |
|
|
|
6 |
|
|
use Term::Screen; |
7 |
|
|
use Carp qw/cluck confess/; |
8 |
|
|
use Data::Dump qw/dump/; |
9 |
|
|
|
10 |
dpavlin |
13 |
use base qw/Class::Accessor/; |
11 |
|
|
__PACKAGE__->mk_accessors( qw/ |
12 |
|
|
lines |
13 |
dpavlin |
12 |
|
14 |
dpavlin |
13 |
debug |
15 |
|
|
/ ); |
16 |
|
|
|
17 |
|
|
|
18 |
|
|
our $VERSION = '0.01'; |
19 |
|
|
|
20 |
dpavlin |
12 |
=head1 NAME |
21 |
|
|
|
22 |
|
|
Term::ISelect - perl only implementation of Interactive Terminal Selection |
23 |
|
|
|
24 |
|
|
=head1 METHODS |
25 |
|
|
|
26 |
dpavlin |
13 |
=head2 new |
27 |
|
|
|
28 |
|
|
my $iselect = Term::ISelect->new({ |
29 |
|
|
lines => [ |
30 |
|
|
'first line', |
31 |
|
|
'{s}second selectable line', |
32 |
|
|
'', |
33 |
|
|
'last line', |
34 |
|
|
], |
35 |
|
|
debug => 1 |
36 |
|
|
}); |
37 |
|
|
|
38 |
dpavlin |
12 |
=cut |
39 |
|
|
|
40 |
|
|
my $scr; |
41 |
|
|
|
42 |
|
|
# leave sane terminal if script dies |
43 |
|
|
$SIG{__DIE__} = sub { |
44 |
|
|
eval { system('stty sane'); }; |
45 |
|
|
}; |
46 |
|
|
|
47 |
|
|
my @lines; |
48 |
|
|
|
49 |
|
|
my $top_screen_line = 0; # offset in original text |
50 |
|
|
my $pos = 0; |
51 |
|
|
|
52 |
|
|
# default: select first line |
53 |
|
|
my $sel_pos = 0; |
54 |
|
|
my $status_text = ''; |
55 |
|
|
my $error_text = ''; |
56 |
|
|
|
57 |
|
|
my $status_lines = 3; |
58 |
|
|
|
59 |
|
|
my $selectable_line; |
60 |
|
|
|
61 |
|
|
sub full_line { |
62 |
|
|
my $t = shift; |
63 |
|
|
$t = '' unless defined $t; |
64 |
|
|
return $t . (" " x ($scr->cols - length($t))); |
65 |
|
|
} |
66 |
|
|
|
67 |
|
|
sub chunk { |
68 |
|
|
my $t = shift; |
69 |
|
|
cluck "expected line" unless defined $t; |
70 |
|
|
return substr($t,0,$scr->cols); |
71 |
|
|
} |
72 |
|
|
|
73 |
|
|
sub redraw_line { |
74 |
|
|
my ($l,$line) = @_; |
75 |
|
|
|
76 |
|
|
if ( defined $selectable_line->{ $l + $top_screen_line } ) { |
77 |
|
|
$scr->at($l,0)->bold()->puts( full_line( chunk($line) ) )->normal(); |
78 |
|
|
} else { |
79 |
|
|
$scr->at($l,0)->puts( full_line( chunk($line) ) ); |
80 |
|
|
} |
81 |
|
|
} |
82 |
|
|
|
83 |
|
|
sub redraw { |
84 |
|
|
for my $l (0 .. $scr->rows - $status_lines) { |
85 |
|
|
my $line = $lines[ $l + $top_screen_line ]; |
86 |
|
|
redraw_line( $l, $line ); |
87 |
|
|
last if ($l == $#lines); |
88 |
|
|
} |
89 |
|
|
selected(0); |
90 |
|
|
} |
91 |
|
|
|
92 |
|
|
sub status { |
93 |
|
|
my $pcnt = int(($pos || 0) * 100 / ($#lines || 1)); |
94 |
|
|
my $pos_txt = sprintf('%d, %d%% ',$pos,$pcnt); |
95 |
|
|
|
96 |
|
|
$scr->at($scr->rows - $status_lines + 1,0)->reverse()->puts( |
97 |
|
|
sprintf(' %-'.($scr->cols - length($pos_txt) - 2).'s ',$status_text) |
98 |
|
|
.$pos_txt)->normal(); |
99 |
|
|
$scr->at($scr->rows - $status_lines + 2,0)->puts( |
100 |
|
|
sprintf('%-'.$scr->cols.'s', $error_text) |
101 |
|
|
); |
102 |
|
|
} |
103 |
|
|
|
104 |
|
|
sub selected { |
105 |
|
|
my $d = shift || 0; |
106 |
|
|
|
107 |
|
|
my $screen_line = $pos - $top_screen_line; |
108 |
|
|
|
109 |
|
|
redraw_line( $screen_line, $lines[$pos] ); |
110 |
|
|
|
111 |
|
|
my $last_screen_line = $scr->rows - $status_lines; |
112 |
|
|
|
113 |
|
|
if ( $d < 0 && $screen_line == 0 ) { |
114 |
|
|
if ( $pos > 0 ) { |
115 |
|
|
$top_screen_line--; |
116 |
|
|
$pos--; |
117 |
|
|
} else { |
118 |
|
|
$error_text = "Already at Begin."; |
119 |
|
|
} |
120 |
|
|
redraw; |
121 |
|
|
} elsif ( $d > 0 && $screen_line == $last_screen_line ) { |
122 |
|
|
if ( $pos < $#lines ) { |
123 |
|
|
$top_screen_line++; |
124 |
|
|
$pos++; |
125 |
|
|
} else { |
126 |
|
|
$error_text = "Already at End."; |
127 |
|
|
} |
128 |
|
|
redraw; |
129 |
|
|
} else { |
130 |
|
|
$pos += $d; |
131 |
|
|
} |
132 |
|
|
|
133 |
|
|
my $line = $lines[$pos]; |
134 |
|
|
if ( defined $selectable_line->{ $pos } ) { |
135 |
|
|
$scr->at($pos - $top_screen_line,0)->reverse->bold()->puts( full_line( chunk($line) ) )->normal(); |
136 |
|
|
$sel_pos = $pos; |
137 |
|
|
} else { |
138 |
|
|
$scr->at($pos - $top_screen_line,0)->reverse->puts( full_line( chunk($line) ) ); |
139 |
|
|
$sel_pos = -1; |
140 |
|
|
} |
141 |
|
|
status; |
142 |
|
|
} |
143 |
|
|
|
144 |
|
|
|
145 |
|
|
=head2 screen |
146 |
|
|
|
147 |
|
|
Term::ISelect->screen( |
148 |
|
|
sub { |
149 |
|
|
my $line = shift; |
150 |
|
|
warn "got line: $line\n"; |
151 |
|
|
}, |
152 |
|
|
qw/various lines to be used/, |
153 |
|
|
); |
154 |
|
|
|
155 |
|
|
=cut |
156 |
|
|
|
157 |
|
|
sub screen { |
158 |
|
|
my $class = shift; |
159 |
|
|
|
160 |
|
|
my $callback = shift; |
161 |
|
|
confess "expect callback as first arg" unless ref($callback) eq 'CODE'; |
162 |
|
|
|
163 |
|
|
@lines = @_; |
164 |
|
|
|
165 |
|
|
# find which lines are selectable in input file |
166 |
|
|
for my $l (0 .. $#lines) { |
167 |
|
|
if ($lines[$l] =~ s/^{s}//) { |
168 |
|
|
$selectable_line->{$l}++; |
169 |
|
|
} |
170 |
|
|
} |
171 |
|
|
|
172 |
|
|
# select first selectable line |
173 |
|
|
if ( $selectable_line ) { |
174 |
|
|
$pos = $sel_pos = (sort { $a <=> $b } keys %$selectable_line)[0]; |
175 |
|
|
warn "selected first selectable line $sel_pos"; |
176 |
|
|
} |
177 |
|
|
|
178 |
|
|
$scr = new Term::Screen || die "can't init Term::Screen"; |
179 |
|
|
$scr->clrscr()->noecho(); |
180 |
|
|
redraw; |
181 |
|
|
selected; |
182 |
|
|
|
183 |
|
|
while(my $key = $scr->getch()) { |
184 |
|
|
|
185 |
|
|
$error_text = ""; |
186 |
|
|
|
187 |
|
|
my $lines_on_screen = $scr->rows - $status_lines; |
188 |
|
|
|
189 |
|
|
if ($key eq 'ku') { |
190 |
|
|
selected( -1 ); |
191 |
|
|
} elsif ($key eq 'kd') { |
192 |
|
|
selected( +1 ); |
193 |
|
|
} elsif ($key eq 'pgup' ) { |
194 |
|
|
# first line on screen? |
195 |
|
|
if ( $pos == $top_screen_line ) { |
196 |
|
|
$top_screen_line -= $lines_on_screen; |
197 |
|
|
$top_screen_line = 0 if $top_screen_line < 0; |
198 |
|
|
redraw; |
199 |
|
|
} |
200 |
|
|
selected( -( $pos - $top_screen_line ) ); |
201 |
|
|
} elsif ($key eq 'pgdn' ) { |
202 |
|
|
# last line on screen? |
203 |
|
|
if ( $pos - $top_screen_line == $lines_on_screen ) { |
204 |
|
|
$top_screen_line += $lines_on_screen; |
205 |
|
|
$top_screen_line = $#lines - $lines_on_screen if $top_screen_line >= $#lines - $lines_on_screen; |
206 |
|
|
redraw; |
207 |
|
|
} |
208 |
|
|
selected( $top_screen_line + $lines_on_screen - $pos ); |
209 |
|
|
} |
210 |
|
|
|
211 |
|
|
$status_text = sprintf("pos: %-3d sel_pos: %-3d top_screen_line: %-3d", $pos, $sel_pos, $top_screen_line ); |
212 |
|
|
if ( length($key) > 1 ) { |
213 |
|
|
$status_text .= " key: $key"; |
214 |
|
|
} else { |
215 |
|
|
$status_text .= sprintf("key: %s [%03d][%02x]", $key =~ m/\w/ ? $key : '?' , ord($key), ord($key) ); |
216 |
|
|
} |
217 |
|
|
|
218 |
|
|
# CTRL+L |
219 |
|
|
redraw if ord($key) eq 0x0c; |
220 |
|
|
|
221 |
|
|
# Enter |
222 |
|
|
if ( ord($key) eq 0x0d && $sel_pos > 0 ) { |
223 |
|
|
$error_text = "execute: " . $lines[ $sel_pos ]; |
224 |
|
|
} |
225 |
|
|
|
226 |
|
|
exit if (lc($key) eq 'q'); |
227 |
|
|
|
228 |
|
|
status; |
229 |
|
|
|
230 |
|
|
} |
231 |
|
|
|
232 |
|
|
$scr->clrscr(); |
233 |
|
|
} |
234 |
|
|
|
235 |
dpavlin |
13 |
=head1 SEE ALSO |
236 |
|
|
|
237 |
|
|
L<http://www.ossp.org/pkg/tool/iselect/> - Interactive Terminal Selection |
238 |
|
|
written by Ralf S. Engelschall which is original implementation in C |
239 |
|
|
|
240 |
|
|
=head1 AUTHOR |
241 |
|
|
|
242 |
|
|
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
243 |
|
|
|
244 |
|
|
=head1 COPYRIGHT & LICENSE |
245 |
|
|
|
246 |
|
|
Copyright 2006-2007 Dobrica Pavlinusic, All Rights Reserved. |
247 |
|
|
|
248 |
|
|
This program is free software; you can redistribute it and/or modify it |
249 |
|
|
under the same terms as Perl itself. |
250 |
|
|
|
251 |
|
|
=cut |
252 |
|
|
|
253 |
dpavlin |
12 |
1; |