html::tableparser::table(3pm) [debian man page]

HTML::TableParser::Table(3pm)				User Contributed Perl Documentation			     HTML::TableParser::Table(3pm)

NAME

       HTML::TableParser::Table - support class for HTML::TableParser

DESCRIPTION

       This class is used to keep track of information related to a table and to create the information passed back to the user callbacks.  It is
       in charge of marshalling the massaged header and row data to the user callbacks.

       An instance is created when the controlling TableParser class finds a "<table" tag.  The object is given an id based upon which table it is
       to work on.  Its methods are invoked from the TableParser callbacks when they run across an appropriate tag ("tr", "th", "td").	The object
       is destroyed when the matching "/table" tag is found.

       Since tables may be nested, multiple HTML::TableParser::Table objects may exist simultaneously.	HTML::TableParser uses two pieces of
       information held by this class -- ids and process.  The first is an array of table ids, one element per level of table nesting.	The second
       is a flag indicating whether this table is being processed (i.e. it matches a requested table) or being ignored.  Since HTML::TableParser
       uses the ids information from an existing table to initialize a new table, it first creates an empty sentinel (place holder) table (by
       calling the HTML::TableParser::Table constructor with no arguments).

       The class handles missing "/tr", "/td", and "/th" tags.	As such (especially when handling multi-row headers) user callbacks may be
       slightly delayed (and data cached).  It also handles rows with overlapping columns

LICENSE

       This software is released under the GNU General Public License.	You may find a copy at

	  http://www.fsf.org/copyleft/gpl.html

AUTHOR

       Diab Jerius (djerius@cpan.org)

SEE ALSO

       HTML::Parser, HTML::TableExtract.

perl v5.10.0							    2007-09-21					     HTML::TableParser::Table(3pm)

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)