NAME

HTML::Template::Extension - Module support extension for HTML::Template

SYNOPSIS

use HTML::Template::Extension;

my $text = qq
   |
    Standard module emulation
    =========================
    If all is ok you can read this here --> <TMPL_VAR NAME="test">

   |;

my $comp       = new HTML::Template::Extension(
                                           scalarref => \$text,
                                           plugins=>["DO_NOTHING"],
                       );

$comp->param('test' => "It works!!!");
print $comp->output;

#   OUTPUT:
#
#   Standard module emulation
#   =========================
#   If all is ok you can read this here --> It works!!!

my $text = qq
   |
    SLASH_VAR plugin activation
    ===========================
    Look to see if SLASH_VAR plugin is active  --> <TMPL_VAR NAME="test">NO</TMPL_VAR>

   |;
$comp->plugin_add("SLASH_VAR");
$comp->scalarref(\$text);
$comp->param('test' => "YES");
print $comp->output;

#   OUTPUT:
#
#   SLASH_VAR plugin activation
#   ===========================
#   Look to see if SLASH_VAR plugin is active  --> YES


my $text = qq
   |
    <HTML><BODY> HEAD_BODY plugin activation with autoDeleteHeader enabled
    =========================================================
    Look to see if SLASH_VAR plugin is active  --> <TMPL_VAR NAME="test">NO</TMPL_VAR>
    If you don't see HTML and BODY tags then HEAD_BODY plugin is active.
    </BODY>
    </HTML>
    |;
$comp->plugin_add("HEAD_BODY");
$comp->scalarref(\$text);
$comp->autoDeleteHeader(1);
print $comp->output;
print "and the header is..." . $comp->header. "\n";

#   OUTPUT:
#
#   HEAD_BODY plugin activation with autoDeleteHeader enabled
#   =========================================================
#   Look to see if SLASH_VAR plugin is active  --> YES
#   If you don't see HTML and BODY tags then HEAD_BODY plugin is active.
#   and the header is...
#   <HTML><BODY>

my $text = qq
   |
    DOC plugin activation
    =====================
    Look to see if SLASH_VAR plugin is active  --> <TMPL_VAR NAME="test">NO</TMPL_VAR>
    Look to see if DOC plugin is active  --> <TMPL_DOC>DOC plugin is NOT active</TMPL_DOC>


   |;
$comp->autoDeleteHeader(0);
$comp->scalarref(\$text);
$comp->plugin_add("DOC");
print $comp->output;

#   OUTPUT:
#
#   DOC plugin activation
#   =====================
#   Look to see if SLASH_VAR plugin is active  --> YES
#   Look to see if DOC plugin is active  -->

print qq
   |
    CSTART plugin activation
    ========================
   |;
my $text = qq
   |
    Look to see if SLASH_VAR plugin is active  --> <TMPL_VAR NAME="test">NO</TMPL_VAR>
    Look to see if DOC plugin is active  --> <TMPL_DOC>DOC plugin is NOT active</TMPL_DOC>
    <TMPL_CSTART> If you see ONLY this line then CSTART plugin is active.</TMPL_CSTART>

   |;
$comp->plugin_add("CSTART");
$comp->scalarref(\$text);
print $comp->output . "\n";

#   OUTPUT:
#
#   CSTART plugin activation
#   ========================
#   If you see ONLY this line then CSTART plugin is active.

print qq
   |
    IF_TERN plugin activation
    =========================
   |;

my $text = qq
   |
    If all is ok you can read this here --> %test?It works!!!:It's BAD%
   |;

$comp->plugin_add("IF_TERN");
$comp->scalarref(\$text);
$comp->param('test' => 1);
print $comp->output . "\n";

#   OUTPUT:
#
#   IF_TERN plugin activation
#   =========================
#   If all is ok you can read this here --> It works!!!

DESCRIPTION

This module extends HTML::Template to easily support methods and tags not implemented in parent module. Piece of code needed to add new tags syntax and new functionality are called plugins. All plugins can be dynamically loaded for supporing needed syntax and functionality. This module is a derivated class of HTML::Template base module and, like so, works exactly ad HTML::Template do. But, relative to original module, it differ from:

vanguard_compatibility_mode is enabled by default.

I like TMPL_* tags but there is scope where %...% costruct is very usefull for readability;
die_on_bad_params is disabled by default.

I don't like errors is i wish not to set params or if i try to set some unexistent parameters;
"output" method is oveloaded

to support an hash item "as" to set params directly without setting them befor using param method;
added a new method "html"

with two arguments, an hash ref for setting parameters directly and a scalar argument to set here the file name of template to use. If file name is the same of one just setting in, cache is used;
a costructor parameter "plugins" is added

relative to an array ref with all plugins module to load;
a "plugin_add" method was implemented

to add a single plugin to those already loaded. If a string is passed as plugin_add argument, then HTML::Template::Extention::*** is loaded. If a obj reference is passed, it's used as object Extension. The object passed must implements an init and a push_filter extension. It's better to wrote you own object plugin implements HTML::Template::Extension::ObjBase as parent object.
a "plugins_clear" method was added

to unload all plugins
added "filename","scalarref","arrayref","filehandle"

methods to modify template text after class initialization.

All dynamic plugins live in the HTML::Template::Extension namespace and you can built your own extension to support you prefered tags and functionality. A plugin named DO_NOTHING is present in this package and can be use like a skeleton to built your own plugin. DO_NOTHING, as name says, add nothing to standard HTML::Template::Extension but there are other plugins just available:

HTML::Template::Extension::DOC

to support comment text
HTML::Template::Extension::SLASH_VAR

to support <TMPL_VAR>....</TMPL_VAR> syntax
HTML::Template::Extension::CSTART

to select what parts of your template must be returned by "output" and "html" method
HTML::Template::Extension::HEAD_BODY

that don't add tag syntax but some method for easily working with html files
HTML::Template::Extension::IF_TERN

that add syntax for ternary if operator %bool_var?if_is_true:if_is_false%
HTML::Template::Extension::DO_NOTHING

that do nothing :-)

For more information about this plugins see relative pods file.

METHODS

For method also present in the SUPER class there are only described differens. for a complete description of this methods take a look to SUPER class HTML::Template.

output( 'as' => \%params)

Return text present in filename file using %params hash to set TMPL_* parameters present in this template

html(\%params,$filename)

Under costruction

filename($filepath)

Undef costruction

scalarref(\$text)

Undef costruction

arrayref(\@lines)

Undef costruction

filehandle(*FH)

Undef costruction

DEBUG COMPONENT

There is also two static constants: a DEBUG_FILE_PATH and a DEBUG constant that enable debug infos written on DEBUG_FILE_PATH file.

Debug is disable by default.

LICENSE

This module is free software; you can redistribute it and/or modify it under the terms of either:

a) the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version, or

b) the "Artistic License" which comes with this module.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See either the GNU General Public License or the Artistic License for more details.

You should have received a copy of the Artistic License with this module, in the file ARTISTIC. If not, I'll be glad to provide one.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

AUTHOR

Bruni Emiliano, <info/at/ebruni_dot_it>

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NAME

SYNOPSIS

DESCRIPTION

METHODS

output( 'as' => \%params)

html(\%params,$filename)

filename($filepath)

scalarref(\$text)

arrayref(\@lines)

filehandle(*FH)

DEBUG COMPONENT

LICENSE

AUTHOR

SEE ALSO

Module Install Instructions