1 |
dpavlin |
1 |
#!/usr/bin/perl -w |
2 |
|
|
|
3 |
|
|
use strict; |
4 |
|
|
use Term::Screen; |
5 |
|
|
use Data::Dump qw/dump/; |
6 |
|
|
|
7 |
|
|
my $data = <<'EOF'; |
8 |
|
|
First line |
9 |
|
|
|
10 |
|
|
+first selectable |
11 |
|
|
+ second selectable |
12 |
|
|
|
13 |
|
|
a space.... |
14 |
|
|
|
15 |
|
|
...infinity and beyond |
16 |
|
|
|
17 |
|
|
|
18 |
|
|
+foo |
19 |
|
|
+bar |
20 |
|
|
|
21 |
|
|
bum |
22 |
|
|
EOF |
23 |
|
|
|
24 |
|
|
open(my $ps, "ps ax |") || die "can't do ps ax: $!"; |
25 |
|
|
while(<$ps>) { |
26 |
|
|
$data .= '+'.$_; |
27 |
|
|
$data .= ' '.$_; |
28 |
|
|
} |
29 |
|
|
close($ps); |
30 |
|
|
|
31 |
dpavlin |
2 |
my $scr; |
32 |
dpavlin |
1 |
|
33 |
dpavlin |
2 |
# leave sane terminal if script dies |
34 |
|
|
$SIG{__DIE__} = sub { |
35 |
|
|
eval { system('stty sane'); }; |
36 |
|
|
}; |
37 |
|
|
|
38 |
|
|
|
39 |
dpavlin |
1 |
my @lines = split(/\n/, $data); |
40 |
|
|
|
41 |
|
|
my $o = 0; # offset in original text |
42 |
|
|
my $pos = 0; |
43 |
|
|
|
44 |
dpavlin |
2 |
# default: select first line |
45 |
|
|
my $sel_pos = 0; |
46 |
|
|
my $status_text = ''; |
47 |
|
|
my $error_text = ''; |
48 |
|
|
|
49 |
|
|
|
50 |
dpavlin |
1 |
# find which lines are selectable in input file |
51 |
|
|
my $selectable_line; |
52 |
|
|
|
53 |
|
|
for my $l (0 .. $#lines) { |
54 |
|
|
next if (length($lines[$l]) < 2); |
55 |
|
|
my $foo = ' '; |
56 |
|
|
if ($lines[$l] !~ m/^\s/o) { |
57 |
|
|
$selectable_line->{$l}++; |
58 |
|
|
$foo = '*'; |
59 |
|
|
} |
60 |
|
|
warn "$l: $foo $lines[$l]\n"; |
61 |
|
|
} |
62 |
|
|
|
63 |
dpavlin |
2 |
# select first selectable line |
64 |
|
|
|
65 |
|
|
if ( $selectable_line ) { |
66 |
|
|
$sel_pos = (sort keys %$selectable_line)[0]; |
67 |
|
|
warn "selected first selectable line $pos"; |
68 |
|
|
} |
69 |
|
|
|
70 |
dpavlin |
1 |
sub full_line { |
71 |
|
|
my $t = shift; |
72 |
|
|
my $l = length($t); |
73 |
|
|
return $t . (" " x ($scr->cols - length($t))); |
74 |
|
|
} |
75 |
|
|
|
76 |
|
|
sub chunk { |
77 |
|
|
my $t = shift; |
78 |
|
|
my $o = ''; |
79 |
|
|
$o = substr($t,1,$scr->cols) if length($t) > 1; |
80 |
|
|
return $o . ( ' ' x ( $scr->cols - length($o) - 1 ) ); |
81 |
|
|
} |
82 |
|
|
|
83 |
|
|
sub redraw { |
84 |
|
|
for my $l (0 .. $scr->rows) { |
85 |
|
|
my $line = $lines[ $l + $o ] || ''; |
86 |
|
|
next if (length($line) < 2); |
87 |
|
|
if (substr($line,0,1) !~ m/^\s/o) { |
88 |
|
|
$scr->at($l,0)->bold()->puts( full_line( chunk($line) ) )->normal(); |
89 |
|
|
} else { |
90 |
|
|
$scr->at($l,0)->puts( full_line( chunk($line) ) ); |
91 |
|
|
} |
92 |
|
|
last if ($l == $#lines); |
93 |
|
|
} |
94 |
|
|
} |
95 |
|
|
|
96 |
|
|
sub status { |
97 |
|
|
my $pcnt = int(($pos || 0) * 100 / ($#lines || 1)); |
98 |
|
|
my $pos_txt = sprintf('%d, %d%% ',$pos,$pcnt); |
99 |
|
|
|
100 |
|
|
$scr->at($scr->rows - 2,0)->reverse()->puts( |
101 |
|
|
sprintf(' %-'.($scr->cols - length($pos_txt) - 2).'s ',$status_text) |
102 |
|
|
.$pos_txt)->normal(); |
103 |
|
|
$scr->at($scr->rows - 1,0)->puts( |
104 |
|
|
sprintf('%-'.$scr->cols.'s', $error_text) |
105 |
|
|
); |
106 |
|
|
} |
107 |
|
|
|
108 |
|
|
sub selected { |
109 |
dpavlin |
2 |
my $d = shift || 0; |
110 |
dpavlin |
1 |
|
111 |
|
|
if ( $selectable_line->{ $pos } ) { |
112 |
|
|
$scr->at($pos-$o,0)->bold()->puts( chunk($lines[$pos]) )->normal(); |
113 |
|
|
} else { |
114 |
|
|
$scr->at($pos-$o,0)->puts( chunk($lines[$pos]) )->normal(); |
115 |
|
|
} |
116 |
|
|
$pos += $d; |
117 |
|
|
|
118 |
|
|
my $max_row = $scr->rows - 3; |
119 |
|
|
|
120 |
|
|
if ($pos < 1) { |
121 |
|
|
$error_text = "Already at Begin."; |
122 |
|
|
$pos = 0; |
123 |
|
|
redraw; |
124 |
|
|
} elsif ($pos > $max_row) { |
125 |
|
|
$o = $pos - $max_row; # put selected line on last |
126 |
|
|
$error_text = "Already at End."; |
127 |
|
|
redraw; |
128 |
|
|
} |
129 |
|
|
|
130 |
|
|
$scr->at($pos-$o,0)->reverse()->puts(chunk($lines[$pos]))->normal(); |
131 |
|
|
status; |
132 |
|
|
} |
133 |
|
|
|
134 |
dpavlin |
2 |
$scr = new Term::Screen || die "can't init Term::Screen"; |
135 |
|
|
$scr->clrscr()->noecho(); |
136 |
dpavlin |
1 |
$status_text = "let's see does it work?"; |
137 |
|
|
redraw; |
138 |
|
|
selected; |
139 |
|
|
|
140 |
|
|
while(my $key = $scr->getch()) { |
141 |
|
|
|
142 |
dpavlin |
2 |
$status_text = sprintf("pos: %-3d sel_pos: %-3d", $pos, $sel_pos ); |
143 |
|
|
if ( length($key) > 1 ) { |
144 |
|
|
$status_text .= " key: $key"; |
145 |
|
|
} else { |
146 |
|
|
$status_text .= sprintf("key: %s [%03d][%02x]", $key, ord($key), ord($key) ); |
147 |
|
|
} |
148 |
|
|
|
149 |
dpavlin |
1 |
$error_text = ""; |
150 |
|
|
|
151 |
|
|
if ($key eq 'ku') { |
152 |
|
|
selected( -1 ); |
153 |
|
|
} elsif ($key eq 'kd') { |
154 |
|
|
selected( +1 ); |
155 |
|
|
} |
156 |
|
|
|
157 |
|
|
status; |
158 |
|
|
|
159 |
|
|
exit if (lc($key) eq 'q'); |
160 |
|
|
} |
161 |
|
|
|
162 |
|
|
$scr->clrscr(); |