For those that don't know, Auto Layout is just the cassowary linear constraint solving algorithm implemented in a nice UI library. There are a number of projec

For those that don't know, Auto Layout is just the cassowary linear constraint solving algorithm implemented in a nice UI library. There are a number of projects that already kind of do this (GSS being one of them, as someone else already mentioned) but with Houdini on the way this might become a very real contender in the near future. I've already done some work with it - you can see a POC here: https://github.com/qix-/casscade https://github.com/qix-/casscade One large problem (with GSS at least) was that it's difficult to "back-propagate" child layout values into parent containers. For example, if an element has a flexible width, then calculating what its width should be based on its textual content is very, very difficult with Cassowary - especially when that value should be used to influence its parent node's size.