Every page or post source file of OpooPress will be processed twice:

• File format processing: process Markdown, Textile and other supported markup language file to output content(maybe contains FreeMarker tags and expressions)
• Template processing: process content (contains FreeMarker tags and expressions) to final HTML content

So the source file of OpooPress can use FreeMarker tags, expressions and variables directly. We already know the variables defined in the YAML front- matter header, and now we will learn other more variables in OpooPress.

• site
  • Site instance object. Type is org.opoo.press.Site.
• page
  • Page or post instance object. Type is org.opoo.press.Page or org.opoo.press.Post, depends on source file layout(template).
• root_url
  • Blog (site) root, such as / or /en.
• paginator
  • Paginator object. It is available in site index page.
• related_posts
  • Recent post colletion. It is available in post only.
• All registered TemplateModel objects
  • The freemarker.template.TemplateModel objects those regiestered by custom plugin(s).

site

All public properties of type org.opoo.press.Site and all variables defined in config.yml are accessable.

page

All public properties of type org.opoo.press.Page or org.opoo.press.Post and all variables defined in the YAML front- matter are accessable.

paginator

Type is org.opoo.press.Pager.

related_posts

Type is List<org.opoo.press.Post>.

TemplateModel objects

In secondary development of OpooPress, we can define our own freemarker.template.TemplateModel and register it in our own custom plugin.