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1 | package CGI::Pretty; |
2 | ||
3 | # See the bottom of this file for the POD documentation. Search for the | |
4 | # string '=head'. | |
5 | ||
6 | # You can run this file through either pod2man or pod2html to produce pretty | |
7 | # documentation in manual or html file format (these utilities are part of the | |
8 | # Perl 5 distribution). | |
9 | ||
10 | use strict; | |
11 | use CGI (); | |
12 | ||
13 | $CGI::Pretty::VERSION = '1.05_00'; | |
14 | $CGI::DefaultClass = __PACKAGE__; | |
15 | $CGI::Pretty::AutoloadClass = 'CGI'; | |
16 | @CGI::Pretty::ISA = qw( CGI ); | |
17 | ||
18 | initialize_globals(); | |
19 | ||
20 | sub _prettyPrint { | |
21 | my $input = shift; | |
22 | ||
23 | foreach my $i ( @CGI::Pretty::AS_IS ) { | |
24 | if ( $$input =~ /<\/$i>/si ) { | |
25 | my ( $a, $b, $c, $d, $e ) = $$input =~ /(.*)<$i(\s?)(.*?)>(.*?)<\/$i>(.*)/si; | |
26 | _prettyPrint( \$a ); | |
27 | _prettyPrint( \$e ); | |
28 | ||
29 | $$input = "$a<$i$b$c>$d</$i>$e"; | |
30 | return; | |
31 | } | |
32 | } | |
33 | $$input =~ s/$CGI::Pretty::LINEBREAK/$CGI::Pretty::LINEBREAK$CGI::Pretty::INDENT/g if $CGI::Pretty::LINEBREAK; | |
34 | } | |
35 | ||
36 | sub comment { | |
37 | my($self,@p) = CGI::self_or_CGI(@_); | |
38 | ||
39 | my $s = "@p"; | |
40 | $s =~ s/$CGI::Pretty::LINEBREAK/$CGI::Pretty::LINEBREAK$CGI::Pretty::INDENT/g if $CGI::Pretty::LINEBREAK; | |
41 | ||
42 | return $self->SUPER::comment( "$CGI::Pretty::LINEBREAK$CGI::Pretty::INDENT$s$CGI::Pretty::LINEBREAK" ) . $CGI::Pretty::LINEBREAK; | |
43 | } | |
44 | ||
45 | sub _make_tag_func { | |
46 | my ($self,$tagname) = @_; | |
47 | return $self->SUPER::_make_tag_func($tagname) if $tagname=~/^(start|end)_/; | |
48 | ||
49 | # As Lincoln as noted, the last else clause is VERY hairy, and it | |
50 | # took me a while to figure out what I was trying to do. | |
51 | # What it does is look for tags that shouldn't be indented (e.g. PRE) | |
52 | # and makes sure that when we nest tags, those tags don't get | |
53 | # indented. | |
54 | # For an example, try print td( pre( "hello\nworld" ) ); | |
55 | # If we didn't care about stuff like that, the code would be | |
56 | # MUCH simpler. BTW: I won't claim to be a regular expression | |
57 | # guru, so if anybody wants to contribute something that would | |
58 | # be quicker, easier to read, etc, I would be more than | |
59 | # willing to put it in - Brian | |
60 | ||
61 | return qq{ | |
62 | sub $tagname { | |
63 | # handle various cases in which we're called | |
64 | # most of this bizarre stuff is to avoid -w errors | |
65 | shift if \$_[0] && | |
66 | (ref(\$_[0]) && | |
67 | (substr(ref(\$_[0]),0,3) eq 'CGI' || | |
68 | UNIVERSAL::isa(\$_[0],'CGI'))); | |
69 | ||
70 | my(\$attr) = ''; | |
71 | if (ref(\$_[0]) && ref(\$_[0]) eq 'HASH') { | |
72 | my(\@attr) = make_attributes(shift); | |
73 | \$attr = " \@attr" if \@attr; | |
74 | } | |
75 | ||
76 | my(\$tag,\$untag) = ("\L<$tagname\E\$attr>","\L</$tagname>\E"); | |
77 | return \$tag unless \@_; | |
78 | ||
79 | my \@result; | |
80 | my \$NON_PRETTIFY_ENDTAGS = join "", map { "</\$_>" } \@CGI::Pretty::AS_IS; | |
81 | ||
82 | if ( \$NON_PRETTIFY_ENDTAGS =~ /\$untag/ ) { | |
83 | \@result = map { "\$tag\$_\$untag\$CGI::Pretty::LINEBREAK" } | |
84 | (ref(\$_[0]) eq 'ARRAY') ? \@{\$_[0]} : "\@_"; | |
85 | } | |
86 | else { | |
87 | my \@args; | |
88 | if(ref(\$_[0]) eq 'ARRAY') { | |
89 | \@args = \@{\$_[0]} | |
90 | } else { | |
91 | foreach (\@_) { | |
92 | \$args[0] .= \$_; | |
93 | \$args[0] .= " " unless \$args[0] =~ /\\s\$/; | |
94 | } | |
95 | chop \$args[0]; | |
96 | } | |
97 | \@result = map { | |
98 | chomp; | |
99 | if ( \$_ !~ /<\\// ) { | |
100 | s/\$CGI::Pretty::LINEBREAK/\$CGI::Pretty::LINEBREAK\$CGI::Pretty::INDENT/g if \$CGI::Pretty::LINEBREAK; | |
101 | } | |
102 | else { | |
103 | my \$tmp = \$_; | |
104 | CGI::Pretty::_prettyPrint( \\\$tmp ); | |
105 | \$_ = \$tmp; | |
106 | } | |
107 | "\$tag\$CGI::Pretty::LINEBREAK\$CGI::Pretty::INDENT\$_\$CGI::Pretty::LINEBREAK\$untag\$CGI::Pretty::LINEBREAK" | |
108 | } \@args; | |
109 | } | |
110 | local \$" = ""; | |
111 | return "\@result"; | |
112 | } | |
113 | }; | |
114 | } | |
115 | ||
116 | sub start_html { | |
117 | return CGI::start_html( @_ ) . $CGI::Pretty::LINEBREAK; | |
118 | } | |
119 | ||
120 | sub end_html { | |
121 | return CGI::end_html( @_ ) . $CGI::Pretty::LINEBREAK; | |
122 | } | |
123 | ||
124 | sub new { | |
125 | my $class = shift; | |
126 | my $this = $class->SUPER::new( @_ ); | |
127 | ||
128 | Apache->request->register_cleanup(\&CGI::Pretty::_reset_globals) if ($CGI::MOD_PERL); | |
129 | $class->_reset_globals if $CGI::PERLEX; | |
130 | ||
131 | return bless $this, $class; | |
132 | } | |
133 | ||
134 | sub initialize_globals { | |
135 | # This is the string used for indentation of tags | |
136 | $CGI::Pretty::INDENT = "\t"; | |
137 | ||
138 | # This is the string used for seperation between tags | |
139 | $CGI::Pretty::LINEBREAK = "\n"; | |
140 | ||
141 | # These tags are not prettify'd. | |
142 | @CGI::Pretty::AS_IS = qw( a pre code script textarea ); | |
143 | ||
144 | 1; | |
145 | } | |
146 | sub _reset_globals { initialize_globals(); } | |
147 | ||
148 | 1; | |
149 | ||
150 | =head1 NAME | |
151 | ||
152 | CGI::Pretty - module to produce nicely formatted HTML code | |
153 | ||
154 | =head1 SYNOPSIS | |
155 | ||
156 | use CGI::Pretty qw( :html3 ); | |
157 | ||
158 | # Print a table with a single data element | |
159 | print table( TR( td( "foo" ) ) ); | |
160 | ||
161 | =head1 DESCRIPTION | |
162 | ||
163 | CGI::Pretty is a module that derives from CGI. It's sole function is to | |
164 | allow users of CGI to output nicely formatted HTML code. | |
165 | ||
166 | When using the CGI module, the following code: | |
167 | print table( TR( td( "foo" ) ) ); | |
168 | ||
169 | produces the following output: | |
170 | <TABLE><TR><TD>foo</TD></TR></TABLE> | |
171 | ||
172 | If a user were to create a table consisting of many rows and many columns, | |
173 | the resultant HTML code would be quite difficult to read since it has no | |
174 | carriage returns or indentation. | |
175 | ||
176 | CGI::Pretty fixes this problem. What it does is add a carriage | |
177 | return and indentation to the HTML code so that one can easily read | |
178 | it. | |
179 | ||
180 | print table( TR( td( "foo" ) ) ); | |
181 | ||
182 | now produces the following output: | |
183 | <TABLE> | |
184 | <TR> | |
185 | <TD> | |
186 | foo | |
187 | </TD> | |
188 | </TR> | |
189 | </TABLE> | |
190 | ||
191 | ||
192 | =head2 Tags that won't be formatted | |
193 | ||
194 | The <A> and <PRE> tags are not formatted. If these tags were formatted, the | |
195 | user would see the extra indentation on the web browser causing the page to | |
196 | look different than what would be expected. If you wish to add more tags to | |
197 | the list of tags that are not to be touched, push them onto the C<@AS_IS> array: | |
198 | ||
199 | push @CGI::Pretty::AS_IS,qw(CODE XMP); | |
200 | ||
201 | =head2 Customizing the Indenting | |
202 | ||
203 | If you wish to have your own personal style of indenting, you can change the | |
204 | C<$INDENT> variable: | |
205 | ||
206 | $CGI::Pretty::INDENT = "\t\t"; | |
207 | ||
208 | would cause the indents to be two tabs. | |
209 | ||
210 | Similarly, if you wish to have more space between lines, you may change the | |
211 | C<$LINEBREAK> variable: | |
212 | ||
213 | $CGI::Pretty::LINEBREAK = "\n\n"; | |
214 | ||
215 | would create two carriage returns between lines. | |
216 | ||
217 | If you decide you want to use the regular CGI indenting, you can easily do | |
218 | the following: | |
219 | ||
220 | $CGI::Pretty::INDENT = $CGI::Pretty::LINEBREAK = ""; | |
221 | ||
222 | =head1 BUGS | |
223 | ||
224 | This section intentionally left blank. | |
225 | ||
226 | =head1 AUTHOR | |
227 | ||
228 | Brian Paulsen <Brian@ThePaulsens.com>, with minor modifications by | |
229 | Lincoln Stein <lstein@cshl.org> for incorporation into the CGI.pm | |
230 | distribution. | |
231 | ||
232 | Copyright 1999, Brian Paulsen. All rights reserved. | |
233 | ||
234 | This library is free software; you can redistribute it and/or modify | |
235 | it under the same terms as Perl itself. | |
236 | ||
237 | Bug reports and comments to Brian@ThePaulsens.com. You can also write | |
238 | to lstein@cshl.org, but this code looks pretty hairy to me and I'm not | |
239 | sure I understand it! | |
240 | ||
241 | =head1 SEE ALSO | |
242 | ||
243 | L<CGI> | |
244 | ||
245 | =cut |