Login or Register to Ask a Question and Join Our Community

Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

html::assubs(3) [suse man page]

HTML::AsSubs(3) 					User Contributed Perl Documentation					   HTML::AsSubs(3)

NAME

       HTML::AsSubs - functions that construct a HTML syntax tree

SYNOPSIS

	use HTML::AsSubs;
	$h = body(
		  h1("This is the heading"),
		  p("This is the first paragraph which contains a ",
		    a({href=>'link.html'}, "link"),
		    " and an ",
		    img({src=>'img.gif', alt=>'image'}),
		    "."
		   ),
		 );
	print $h->as_HTML;

DESCRIPTION

       This module exports functions that can be used to construct various HTML elements. The functions are named after the tags of the
       correponding HTML element and are all written in lower case. If the first argument is a hash reference then it will be used to initialize
       the attributes of this element. The remaining arguments are regarded as content.

       For a similar idea (i.e., it's another case where the syntax tree of the Perl source mirrors the syntax tree of the HTML produced), see
       HTML::Element's "new_from_lol" method.

       For what I now think is a cleaner implementation of this same idea, see the excellent module "XML::Generator", which is what I suggest for
       actual real-life use.  (I suggest this over "HTML::AsSubs" and over "CGI.pm"'s HTML-making functions.)

ACKNOWLEDGEMENT

       This module was inspired by the following message:

	Date: Tue, 4 Oct 1994 16:11:30 +0100
	Subject: Wow! I have a large lightbulb above my head!

	Take a moment to consider these lines:

	%OVERLOAD=( '""' => sub { join("", @{$_[0]}) } );

	sub html { my($type)=shift; bless ["<$type>", @_, "</$type>"]; }

	:-)  I *love* Perl 5!  Thankyou Larry and Ilya.

	Regards,
	Tim Bunce.

	p.s. If you didn't get it, think about recursive data types: html(html())
	p.p.s. I'll turn this into a much more practical example in a day or two.
	p.p.p.s. It's a pity that overloads are not inherited. Is this a bug?

BUGS

       The exported link() function overrides the builtin link() function.  The exported tr() function must be called using &tr(...) syntax
       because it clashes with the builtin tr/../../ operator.

SEE ALSO

       HTML::Element, XML::Generator

Private Functions
   _elem()
       The _elem() function is wrapped by all the html 'tag' functions. It takes a tag-name, optional hashref of attributes and a list of content
       as parameters.

perl v5.12.1							    2006-08-04							   HTML::AsSubs(3)

Check Out this Related Man Page

HTML::Filter(3) 					User Contributed Perl Documentation					   HTML::Filter(3)

NAME

       HTML::Filter - Filter HTML text through the parser

NOTE

       This module is deprecated. The "HTML::Parser" now provides the functionally of "HTML::Filter" much more efficiently with the the "default"
       handler.

SYNOPSIS

	require HTML::Filter;
	$p = HTML::Filter->new->parse_file("index.html");

DESCRIPTION

       "HTML::Filter" is an HTML parser that by default prints the original text of each HTML element (a slow version of cat(1) basically).  The
       callback methods may be overridden to modify the filtering for some HTML elements and you can override output() method which is called to
       print the HTML text.

       "HTML::Filter" is a subclass of "HTML::Parser". This means that the document should be given to the parser by calling the $p->parse() or
       $p->parse_file() methods.

EXAMPLES

       The first example is a filter that will remove all comments from an HTML file.  This is achieved by simply overriding the comment method to
       do nothing.

	 package CommentStripper;
	 require HTML::Filter;
	 @ISA=qw(HTML::Filter);
	 sub comment { }  # ignore comments

       The second example shows a filter that will remove any <TABLE>s found in the HTML file.	We specialize the start() and end() methods to
       count table tags and then make output not happen when inside a table.

	 package TableStripper;
	 require HTML::Filter;
	 @ISA=qw(HTML::Filter);
	 sub start
	 {
	    my $self = shift;
	    $self->{table_seen}++ if $_[0] eq "table";
	    $self->SUPER::start(@_);
	 }

	 sub end
	 {
	    my $self = shift;
	    $self->SUPER::end(@_);
	    $self->{table_seen}-- if $_[0] eq "table";
	 }

	 sub output
	 {
	     my $self = shift;
	     unless ($self->{table_seen}) {
		 $self->SUPER::output(@_);
	     }
	 }

       If you want to collect the parsed text internally you might want to do something like this:

	 package FilterIntoString;
	 require HTML::Filter;
	 @ISA=qw(HTML::Filter);
	 sub output { push(@{$_[0]->{fhtml}}, $_[1]) }
	 sub filtered_html { join("", @{$_[0]->{fhtml}}) }

SEE ALSO

       HTML::Parser

COPYRIGHT

       Copyright 1997-1999 Gisle Aas.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.3							    2013-03-25							   HTML::Filter(3)
Man Page