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<p><a name="__index__"></a></p>
<!-- INDEX BEGIN -->
<ul>
<li><a href="#name">NAME</a></li>
<li><a href="#synopsis">SYNOPSIS</a></li>
<li><a href="#description">DESCRIPTION</a></li>
<ul>
<li><a href="#inheritance">Inheritance</a></li>
<li><a href="#inheriting_from_multiple_locations">Inheriting from multiple locations</a></li>
</ul>
<li><a href="#methods">METHODS</a></li>
<ul>
<li><a href="#get_path">get_path</a></li>
<li><a href="#get_all_paths">get_all_paths</a></li>
<li><a href="#tree">tree</a></li>
</ul>
<li><a href="#see_also">SEE ALSO</a></li>
<li><a href="#maintainer">MAINTAINER</a></li>
<li><a href="#copyright">COPYRIGHT</a></li>
<li><a href="#version">VERSION</a></li>
</ul>
<!-- INDEX END -->
<hr />
<p>
</p>
<h1><a name="name">NAME</a></h1>
<p>GT::Template::Inheritance - Provides GT::Template inheritance/local file
determination.</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
use GT::Template::Inheritance;</pre>
<pre>
my $file = GT::Template::Inheritance-&gt;get_path(
file =&gt; &quot;foo.htm&quot;,
path =&gt; &quot;/path/to/my/template/set&quot;
);</pre>
<pre>
my @files = GT::Template::Inheritance-&gt;get_all_paths(
file =&gt; &quot;foo.htm&quot;,
path =&gt; &quot;/path/to/my/template/set&quot;
);</pre>
<pre>
my @paths = GT::Template::Inheritance-&gt;tree(
path =&gt; &quot;/path/to/my/template/set&quot;
);</pre>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p>GT::Template::Inheritance provides an interface to accessing files for
GT::Template template parsing and include handling. It supports following
inheritance directories and respects ``local'' template directories.</p>
<p>
</p>
<h2><a name="inheritance">Inheritance</a></h2>
<p>GT::Template inheritance works by looking for a .tplinfo file in the template
directory (or local/.tplinfo, if it exists). In order for the template
directory to inherit from another template directory, this file must exist and
must evaluate to a hash reference containing an <a href="#item_inheritance"><code>inheritance</code></a> key. The
following is a possible .tplinfo file contents:</p>
<pre>
{
inheritance =&gt; '../other'
}</pre>
<p>The above example would indicate that files in this template set can be
inherited from the ../other path, relative to the current template set
directory. The inheritance directory may also contain a full path.</p>
<p>
</p>
<h2><a name="inheriting_from_multiple_locations">Inheriting from multiple locations</a></h2>
<p>You may also inherit from multiple locations by using an array reference for
the inheritance value:</p>
<pre>
{
inheritance =&gt; ['../other', '/full/path/to/a/third']
}</pre>
<p>With the above .tplinfo file, files would be checked for in the current path,
then <code>../other</code>, then any of <code>../other</code>'s inherited directories, then in
<code>third</code>, then in any of <code>third</code>'s inherited directories.</p>
<p>Also keep in mind that ``local'' directories, if they exist, will be checked for
the file before each of their respective directories.</p>
<p>Assuming that the initial template path was <code>/full/path/one</code>, and assuming
that <code>../other</code> inherited from <code>../other2</code>, the directories checked would be
as follows:</p>
<pre>
/full/path/one/local
/full/path/one
/full/path/one/../other/local # i.e. /full/path/other/local
/full/path/one/../other # i.e. /full/path/other
/full/path/one/../other/../other2/local # i.e. /full/path/other2/local
/full/path/one/../other/../other2 # i.e. /full/path/other2
/full/path/to/a/third/local
/full/path/to/a/third</pre>
<p>
</p>
<hr />
<h1><a name="methods">METHODS</a></h1>
<p>All methods in GT::Template::Inheritance are class methods. Each method takes
a hash of options as an argument.</p>
<p>
</p>
<h2><a name="get_path">get_path</a></h2>
<p>
</p>
<h2><a name="get_all_paths">get_all_paths</a></h2>
<p>These methods are used to obtain the location of the file GT::Template will
use, taking into account all inherited and ``local'' template directories. The
get_path option will return the path to the file that will be included, while
the get_all_paths option returns the path to <strong>all</strong> copies of the file found in
the local/inheritance tree. Both methods take a hash containing the following:</p>
<dl>
<dt><strong><a name="item_file">file</a></strong><br />
</dt>
<dd>
The name of the file desired.
</dd>
<p></p>
<dt><strong><a name="item_path">path</a></strong><br />
</dt>
<dd>
The template directory at which to start looking for the above file. Depending
on the existance of ``local'' directories and template inheritance, more than
just this directory will be checked for the file.
</dd>
<p></p>
<dt><strong><a name="item_local">local</a></strong><br />
</dt>
<dd>
Optional. Can be passed with a false value to override the checking of ``local''
directories for files.
</dd>
<p></p>
<dt><strong><a name="item_inheritance">inheritance</a></strong><br />
</dt>
<dd>
Optional. Can be passed with a false value to override the checking of
inheritance directories for files.
</dd>
<p></p></dl>
<p>
</p>
<h2><a name="tree">tree</a></h2>
<p>This method returns a list of directories that would be searched for a given
file, in the order they would be searched. It takes the <a href="#item_path"><code>path</code></a>, <a href="#item_local"><code>local</code></a>, and
<a href="#item_inheritance"><code>inheritance</code></a> options above, but not the <a href="#item_file"><code>file</code></a> option.</p>
<p>
</p>
<hr />
<h1><a name="see_also">SEE ALSO</a></h1>
<p><a href="glist.cgi?do=admin_gtdoc&topic=/GT/Template.html">the GT::Template manpage</a></p>
<p>
</p>
<hr />
<h1><a name="maintainer">MAINTAINER</a></h1>
<p>Jason Rhinelander</p>
<p>
</p>
<hr />
<h1><a name="copyright">COPYRIGHT</a></h1>
<p>Copyright (c) 2005 Gossamer Threads Inc. All Rights Reserved.
<a href="http://www.gossamer-threads.com/">http://www.gossamer-threads.com/</a></p>
<p>
</p>
<hr />
<h1><a name="version">VERSION</a></h1>
<p>Revision: $Id: Inheritance.pm,v 1.7 2005/02/09 20:51:27 jagerman Exp $</p>
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