Since the early days of Joomla 1.5, component layouts have bothered me. First there’s the problematic nomenclature (which I’m probably using incorrectly). Layouts are component-specific snippets of HTML and PHP logic that generate the actual code (usually HTML) that goes to the target device. A template can override the default layout, which is just one of the many powerful features that give Joomla sites so much flexibility.
My biggest problem with layouts is that they typically embed too much logic. Why should a layout be determining what to do if a category description isn’t present? Worse yet, why does it have to check access to see if an article body should be displayed or not? Surely the actual view should be responsible for this sort of thing, and the layout should be strictly concerned with how to present the information that’s available.
The other problem is that layouts are ugly beasts. Most layouts need to flip between HTML and PHP dozens of times, just to do the most simple thing.
I’m not exactly a patient person. Maintaining the existing layout code in the Joomla core components is bothersome enough, but recently I started doing extensive work on a third party component, adding my own view in the process. That’s when that familiar snapping sound resonated in my head. Always a sucker for diversions, I decided to follow the tangent and see if I could improve Joomla layouts.
It took about triple the expected effort, largely because the initial results were pretty exciting, and I decided to do more than a hack job. The result is JTML, and the results are described in the white paper Simplifying Joomla Template Layouts.
Every once in a while, the idea of creating a simple language for creating Joomla extensions comes up, but that is a very big job indeed, and there are many, many other things to do in the project. So it remains a bit of a dream. I’m hoping JTML is one small step in that direction.