Blatte::HTML(3)

NAME
Blatte::HTML - tools for generating HTML with Blatte

SYNOPSIS
  use Blatte;
  use Blatte::Builtins;
  use Blatte::HTML;

  $perl = &Blatte::Parse(...string of Blatte code...);
  $val = eval $perl;
  &Blatte::HTML::render($val, \&emit);

  sub emit {
    print shift;
  }

DESCRIPTION
This module defines Blatte functions corresponding to HTML tags, making it possible to write Blatte that looks like this:

  Here is a {\a \href=http://www.blatte.org/ link}

and can be translated to this:

  Here is a <a href="http://www.blatte.org/">link</a>

The beauty is that you can use Blatte functions to encapsulate repeated constructs. For instance, this definition:

  {\define {\mypagestyle \=name \&content}
   {\html {\head {\title \name}}
          {\body {\h1 \name} \content}}}

allows you to write

  {\mypagestyle \name={A page I wrote} This is my page.}

which saves you from having to write:

  <html><head><title>A page I wrote</title></head>
  <body><h1>A page I wrote</h1>This is my page.</body></html>

End-tags are supplied automatically. The module HTML::Tagset, by Gisle Aas and Sean M. Burke, is used to identify HTML elements that require no end-tag.

Paragraph tags (<p>) are also supplied automatically wherever a blank line appears in the text. For instance, this:

  Here is some text.

  Here is some more.

becomes this:

  Here is some text.

  <p>Here is some more.

This module tries hard to keep HTML element nesting correct. For instance, this:

  Paragraph 1.

  Paragraph 2 {\b with some bold text

  continuing to paragraph 3}.

becomes this:

  Paragraph 1.

  <p>Paragraph 2 <b>with some bold text</b></p>

  <p><b>continuing to paragraph 3</b>.

Entity-encoding is automatic too. So this:

  Five & dime

becomes this:

  Five &amp; dime

It's possible to suppress automatic <p>-tag generation and entity-encoding by writing:

  {\html_p_no ...content...}

and

  {\html_ent_no ...content...}

Inside an {\html_p_no ...} it's possible to reenable <p>-tag generation with {\html_p_yes ...}, and inside {\html_ent_no ...} it's possible to reenable entity encoding with {\html_ent_yes ...}.

FUNCTIONS

make_start_tag(ELEMENT)
    Given a Blatte::HTML::Element object, returns a string representing that element's HTML start tag.

    (Blatte::HTML::Element is the type of object returned by the Blatte functions representing HTML tags.)

render(OBJECT, CALLBACK)
    Renders OBJECT as HTML, converting it to a series of strings that are passed one at a time to repeated calls to CALLBACK. OBJECT can be a string, a Blatte::HTML::Element object, or a Blatte list (Perl ARRAY ref) containing any combination of strings, Blatte::HTML::Elements, and Blatte lists.

BLATTE FUNCTIONS
This module defines a Blatte function for every HTML element defined in the HTML 4.01 specification (http://www.w3.org/TR/html401):

    a abbr acronym address applet area b base basefont bdo big
    blockquote body br button caption center cite code col colgroup dd
    del dfn dir div dl dt em fieldset font form frame frameset h1 h2
    h3 h4 h5 h6 head hr html i iframe img input ins isindex kbd label
    legend li link map menu meta noframes noscript object ol optgroup
    option p param pre q s samp script select small span strike strong
    style sub sup table tbody td textarea tfoot th thead title tr tt u
    ul var

Tag names are case-sensitive.

HTML attributes are specified using Blatte named parameters, like so:

  {\td \colspan=2 ...}

Boolean attributes, such as the "ismap" in

  <img src="..." ismap>

are specified using {\html_bool_yes} and {\html_bool_no}. For instance, this:

  {\img \src=... \ismap={\html_bool_yes}}

yields this:

  <img src="..." ismap>

while this:

  {\img \src=... \ismap={\html_bool_no}}

yields this:

  <img src="...">

AUTHOR
Bob Glickstein <bobg@zanshin.com>.

Visit the Blatte website, <http://www.blatte.org/>. (It's written using Blatte::HTML!)

LICENSE
Copyright 2001 Bob Glickstein. All rights reserved.

Blatte::HTML is distributed under the terms of the GNU General Public License, version 2. See the file LICENSE that accompanies the Blatte::HTML distribution.

SEE ALSO
blatte-html(1), Blatte(3), Blatte::Builtins(3).