package CGI::Pretty; # See the bottom of this file for the POD documentation. Search for the # string '=head'. # You can run this file through either pod2man or pod2html to produce pretty # documentation in manual or html file format (these utilities are part of the # Perl 5 distribution). use strict; use if $] >= 5.019, 'deprecate'; use CGI (); $CGI::Pretty::VERSION = '3.64'; $CGI::DefaultClass = __PACKAGE__; $CGI::Pretty::AutoloadClass = 'CGI'; @CGI::Pretty::ISA = qw( CGI ); initialize_globals(); sub _prettyPrint { my $input = shift; return if !$$input; return if !$CGI::Pretty::LINEBREAK || !$CGI::Pretty::INDENT; # print STDERR "'", $$input, "'\n"; foreach my $i ( @CGI::Pretty::AS_IS ) { if ( $$input =~ m{}si ) { my ( $a, $b, $c ) = $$input =~ m{(.*)(<$i[\s/>].*?)(.*)}si; next if !$b; $a ||= ""; $c ||= ""; _prettyPrint( \$a ) if $a; _prettyPrint( \$c ) if $c; $b ||= ""; $$input = "$a$b$c"; return; } } $$input =~ s/$CGI::Pretty::LINEBREAK/$CGI::Pretty::LINEBREAK$CGI::Pretty::INDENT/g; } sub comment { my($self,@p) = CGI::self_or_CGI(@_); my $s = "@p"; $s =~ s/$CGI::Pretty::LINEBREAK/$CGI::Pretty::LINEBREAK$CGI::Pretty::INDENT/g if $CGI::Pretty::LINEBREAK; return $self->SUPER::comment( "$CGI::Pretty::LINEBREAK$CGI::Pretty::INDENT$s$CGI::Pretty::LINEBREAK" ) . $CGI::Pretty::LINEBREAK; } sub _make_tag_func { my ($self,$tagname) = @_; # As Lincoln as noted, the last else clause is VERY hairy, and it # took me a while to figure out what I was trying to do. # What it does is look for tags that shouldn't be indented (e.g. PRE) # and makes sure that when we nest tags, those tags don't get # indented. # For an example, try print td( pre( "hello\nworld" ) ); # If we didn't care about stuff like that, the code would be # MUCH simpler. BTW: I won't claim to be a regular expression # guru, so if anybody wants to contribute something that would # be quicker, easier to read, etc, I would be more than # willing to put it in - Brian my $func = qq" sub $tagname {"; $func .= q' shift if $_[0] && (ref($_[0]) && (substr(ref($_[0]),0,3) eq "CGI" || UNIVERSAL::isa($_[0],"CGI"))); my($attr) = ""; if (ref($_[0]) && ref($_[0]) eq "HASH") { my(@attr) = make_attributes(shift()||undef,1); $attr = " @attr" if @attr; }'; if ($tagname=~/start_(\w+)/i) { $func .= qq! return "<\L$1\E\$attr>\$CGI::Pretty::LINEBREAK";} !; } elsif ($tagname=~/end_(\w+)/i) { $func .= qq! return "<\L/$1\E>\$CGI::Pretty::LINEBREAK"; } !; } else { $func .= qq# return ( \$CGI::XHTML ? "<\L$tagname\E\$attr />" : "<\L$tagname\E\$attr>" ) . \$CGI::Pretty::LINEBREAK unless \@_; my(\$tag,\$untag) = ("<\L$tagname\E\$attr>","\E"); my \%ASIS = map { lc("\$_") => 1 } \@CGI::Pretty::AS_IS; my \@args; if ( \$CGI::Pretty::LINEBREAK || \$CGI::Pretty::INDENT ) { if(ref(\$_[0]) eq 'ARRAY') { \@args = \@{\$_[0]} } else { foreach (\@_) { \$args[0] .= \$_; \$args[0] .= \$CGI::Pretty::LINEBREAK if \$args[0] !~ /\$CGI::Pretty::LINEBREAK\$/ && 0; chomp \$args[0] if exists \$ASIS{ "\L$tagname\E" }; \$args[0] .= \$" if \$args[0] !~ /\$CGI::Pretty::LINEBREAK\$/ && 1; } chop \$args[0] unless \$" eq ""; } } else { \@args = ref(\$_[0]) eq 'ARRAY' ? \@{\$_[0]} : "\@_"; } my \@result; if ( exists \$ASIS{ "\L$tagname\E" } ) { \@result = map { "\$tag\$_\$untag" } \@args; } else { \@result = map { chomp; my \$tmp = \$_; CGI::Pretty::_prettyPrint( \\\$tmp ); \$tag . \$CGI::Pretty::LINEBREAK . \$CGI::Pretty::INDENT . \$tmp . \$CGI::Pretty::LINEBREAK . \$untag . \$CGI::Pretty::LINEBREAK } \@args; } if (\$CGI::Pretty::LINEBREAK || \$CGI::Pretty::INDENT) { return join ("", \@result); } else { return "\@result"; } }#; } return $func; } sub start_html { return CGI::start_html( @_ ) . $CGI::Pretty::LINEBREAK; } sub end_html { return CGI::end_html( @_ ) . $CGI::Pretty::LINEBREAK; } sub new { my $class = shift; my $this = $class->SUPER::new( @_ ); if ($CGI::MOD_PERL) { if ($CGI::MOD_PERL == 1) { my $r = Apache->request; $r->register_cleanup(\&CGI::Pretty::_reset_globals); } else { my $r = Apache2::RequestUtil->request; $r->pool->cleanup_register(\&CGI::Pretty::_reset_globals); } } $class->_reset_globals if $CGI::PERLEX; return bless $this, $class; } sub initialize_globals { # This is the string used for indentation of tags $CGI::Pretty::INDENT = "\t"; # This is the string used for separation between tags $CGI::Pretty::LINEBREAK = $/; # These tags are not prettify'd. # When this list is updated, also update the docs. @CGI::Pretty::AS_IS = qw( a pre code script textarea td ); 1; } sub _reset_globals { initialize_globals(); } # ugly, but quick fix sub import { my $self = shift; no strict 'refs'; ${ "$self\::AutoloadClass" } = 'CGI'; # This causes modules to clash. undef %CGI::EXPORT; undef %CGI::EXPORT; $self->_setup_symbols(@_); my ($callpack, $callfile, $callline) = caller; # To allow overriding, search through the packages # Till we find one in which the correct subroutine is defined. my @packages = ($self,@{"$self\:\:ISA"}); foreach my $sym (keys %CGI::EXPORT) { my $pck; my $def = ${"$self\:\:AutoloadClass"} || $CGI::DefaultClass; foreach $pck (@packages) { if (defined(&{"$pck\:\:$sym"})) { $def = $pck; last; } } *{"${callpack}::$sym"} = \&{"$def\:\:$sym"}; } } 1; =head1 NAME CGI::Pretty - module to produce nicely formatted HTML code =head1 SYNOPSIS use CGI::Pretty qw( :html3 ); # Print a table with a single data element print table( TR( td( "foo" ) ) ); =head1 DESCRIPTION CGI::Pretty is a module that derives from CGI. It's sole function is to allow users of CGI to output nicely formatted HTML code. When using the CGI module, the following code: print table( TR( td( "foo" ) ) ); produces the following output:
foo
If a user were to create a table consisting of many rows and many columns, the resultant HTML code would be quite difficult to read since it has no carriage returns or indentation. CGI::Pretty fixes this problem. What it does is add a carriage return and indentation to the HTML code so that one can easily read it. print table( TR( td( "foo" ) ) ); now produces the following output:
foo
=head2 Recommendation for when to use CGI::Pretty CGI::Pretty is far slower than using CGI.pm directly. A benchmark showed that it could be about 10 times slower. Adding newlines and spaces may alter the rendered appearance of HTML. Also, the extra newlines and spaces also make the file size larger, making the files take longer to download. With all those considerations, it is recommended that CGI::Pretty be used primarily for debugging. =head2 Tags that won't be formatted The following tags are not formatted: ,
, ,