HOWTO-Templates - How to write Slash templates
A template is a bit of text that is parsed by Perl, using the Template Toolkit. Template Toolkit has support for variables, control structures, and more. It is more easily understood and edited by non-programmers than is Perl, and it is much safer than executing raw Perl code.
Templates are compiled into Perl functions and the resulting compiled code is cached. Templates are fast and convenient and easy.
For more information on how templates are written, see the man pages for Slash::Display and Template, and the Template Toolkit web page at <URL:http://www.template-toolkit.org/>.
Use the Template Editor via the admin menu on the site, or use template-tool on the command line. You can find out information on it by calling it with the ``-h'' option.
For a plugin it has to be added to the PLUGIN file (see HOWTO-Plugins). For a theme it just needs to be in the templates directory for the theme (see HOWTO-Themes).
There is a language field for templates, which is, by default, ``en_US''. However, it is not currently used by the code. We have not entirely decided how to handle languages yet.
Currently, the language is based on the same method used to determine locales on Unix: two-letter, lowercase, ISO 639 codes for language; two-letter, uppercase, ISO 3166 codes for country; joined with an underscore. e.g., en_US, en_CA, de_DE, zh_CN, ja_JP.
template-tool -g filename
You can change some of the configuration options of Template, (PRE_CHOMP, POST_CHOMP, and CACHE_SIZE) via the vars table. Most options cannot be changed, however, except by editing the Slash::Display module directly.
The TRIM option (which removes whitespace before and after templates) is on by default. Many things in Slash will fail if TRIM is not true, because it is expected that whitespace will be removed before and after a returned template.
PRE_CHOMP and POST_CHOMP (which remove whitespace before and after individual tags) are off by default, but may be turned on via the template_pre_chomp and template_post_chomp entries in the vars table. In an upcoming version of Template, there will be a third option, other than just ``on'' and ``off'': ``collapse''. This will collapse whitespace between tags down to a single space, and will most likely be ideal for use in Slash, since runs of whitespace in HTML is the same as a single space, in most situations.
You can enable and disable chomping of whitespace for individual tags with ``+'' and ``-''. To enable chomping, write a tag like this:
[% num %] comment [%- IF num != 1 ; 's' ; END %]
That will push the ``s'' character up against the end of ``comment'', if it is printed.
If CHOMP is enabled, you can disable it in the same way, with ``+'' instead of ``-''. See the Template::Parser manpage.
Maybe. We don't have any rules concerning this at the moment, so it will be on a case by case basis. At some point in the future we will come up with a much better answer. If the theme or plugin is one not included with the Slash distribution, you should contact the theme's or plugin's creator directly.
$Id: HOWTO-Templates.pod,v 184.108.40.206 2001/10/10 16:06:26 pudge Exp $