/[swish]/trunk/html/FormatResult.pm
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
ViewVC logotype

Contents of /trunk/html/FormatResult.pm

Parent Directory Parent Directory | Revision Log Revision Log


Revision 107 - (show annotations)
Sat Jul 9 13:14:25 2005 UTC (13 years, 9 months ago) by dpavlin
File size: 2974 byte(s)
highlite to last word characters to catch suffixes

1 #!/usr/bin/perl -w
2
3 package FormatResult;
4
5 use strict;
6
7 =head1 NAME
8
9 FormatResult - functions to pretty print results from search engine
10
11 =head1 SYNOPSIS
12
13 print FormatResult::get_snippet($text, @words);
14
15 print FormatResult::highlite_words(\$text, \@words);
16
17 =head1 DESCRIPTION
18
19 Big brown hack in current stage.
20
21 =head2 get_snippet
22
23 FormatResult::context_chars = 20;
24 my $text = FormatResult::get_snippet($text, @words);
25
26 This functions will return snippet with words in it, showing
27 C<FormatResult::context_chars> characters around each searched word.
28 It's clever enough to find word delimiters and generally do the right thing.
29
30 It will call C<highlite_words> automatically.
31
32 =cut
33
34 # maximum length of context in characters
35 my $context_chars = 50;
36
37 sub get_snippet {
38
39 my $desc = shift || return '';
40
41 # construct regex
42 my $re = qq/^(.*?\\b)(/ . join('|', @_) . qq/)/;
43
44 my $ellip = ' ... ';
45 my $snippet = '';
46
47 #print "<ul>";
48
49 while ($desc =~ s/$re//si) {
50 my ($foo, $match) = ($1,$2);
51
52 #print "<br>desc: <small>$desc</small>\n";
53 #print "<br>foo: <small>$foo<b>$match</b></small>\n";
54
55 if (length($foo) < $context_chars * 2) {
56 $snippet .= $foo . $match;
57 } else {
58
59 if ($foo =~ m/^(.{0,$context_chars})(\s.*?\s|\s|)?(.{0,$context_chars})$/) {
60
61 # print "<li><small>$snippet</small><br>
62 # ",length($1),": <i>$1</i><br>
63 # ",length($2),": <span style=\"color:grey\">$2</span><br>
64 # ",length($3),": <i>$3</i><br>
65 # <b>$match</b>\n";
66
67 if ($snippet) {
68 $snippet .= $1 . $ellip . $3 . $match;
69 } else {
70 $snippet = $ellip . $3 . $match ;
71 }
72
73 } else {
74 # print "<li> <big>SKIP</big> $foo\n";
75 print STDERR "this shouldn't happen!\n";
76 }
77
78 }
79
80 }
81 #print "</ul>";
82
83 $snippet .= $ellip if ($snippet);
84
85 return highlite_words(\$snippet,\@_);
86 }
87
88 =head2 highlite_words
89
90 my $text = FormatResult::highlite_words(\$text, \@words);
91
92 This is stand-alone function which does highlite. It cycle colors
93 and generate html. Have in mind that it takes ref arguments.
94
95 C<@words> can also be array of arrays if you have alternative spellings
96 for each word (e.g. using C<Lingua::Spelling::Alternative>).
97
98 =cut
99
100 sub highlite_words {
101 my ($snip_ref,$words_ref) = @_;
102
103 return '' if (! $snip_ref || ! $words_ref);
104
105 # sort words from longer to shorter (for hilighting later)
106 my @words = sort { length($b) <=> length($a) } @{$words_ref};
107
108 # colors to highlite
109 my @colors = ('#ffff66','#a0ffff','#99ff99','#ff9999','#ff66ff');
110
111 # color offset
112 my $i = 0;
113
114 foreach my $w (@words) {
115 if ($w =~ m/ARRAY/) {
116 foreach my $ww (sort { length($b) <=> length($a) } @{$w}) {
117 $$snip_ref =~ s,(\b\Q$ww\E\w*),<span style="background: $colors[$i]; color:black;">$1</span>,gsi;
118 }
119 } else {
120 $$snip_ref =~ s,(\b\Q$w\E\w*),<span style="background: $colors[$i]; color:black;">$1</span>,gsi;
121 }
122 $i++;
123 $i = 0 if ($i > $#colors);
124 }
125
126 return $$snip_ref;
127 }
128
129 =head1 AUTHOR
130
131 Dobrica Pavlinusic C<dpavlin@rot13.org>, L<http://www.rot13.org/~dpavlin/>
132
133 =cut
134
135 1;

  ViewVC Help
Powered by ViewVC 1.1.26