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module SnippetTags
include TrustyCms::Taggable
class TagError < StandardError; end
desc %{
Renders the snippet specified in the @name@ attribute within the context of a page.
*Usage:*
<pre><code><r:snippet name="snippet_name" /></code></pre>
When used as a double tag, the part in between both tags may be used within the
snippet itself, being substituted in place of @<r:yield/>@.
*Usage:*
<pre><code><r:snippet name="snippet_name">Lorem ipsum dolor...</r:snippet></code></pre>
}
tag 'snippet' do |tag|
required_attr(tag, 'name')
name = tag['name']
snippet = snippet_cache(name.strip)
if snippet
tag.locals.yield = tag.expand if tag.double?
tag.globals.page.render_snippet(snippet)
else
raise TagError.new("snippet '#{name}' not found")
end
end
def snippet_cache(name)
@snippet_cache ||= {}
snippet = @snippet_cache[name]
unless snippet
snippet = SnippetFinder.find_by_name(name)
@snippet_cache[name] = snippet
end
snippet
end
private :snippet_cache
desc %{
Used within a snippet as a placeholder for substitution of child content, when
the snippet is called as a double tag.
*Usage (within a snippet):*
<pre><code>
<div id="outer">
<p>before</p>
<r:yield/>
<p>after</p>
</div>
</code></pre>
If the above snippet was named "yielding", you could call it from any Page,
Layout or Snippet as follows:
<pre><code><r:snippet name="yielding">Content within</r:snippet></code></pre>
Which would output the following:
<pre><code>
<div id="outer">
<p>before</p>
Content within
<p>after</p>
</div>
</code></pre>
When called in the context of a Page or a Layout, @<r:yield/>@ outputs nothing.
}
tag 'yield' do |tag|
tag.locals.yield
end
end
Version data entries
59 entries across 59 versions & 2 rubygems