I don't know how many of you are familiar with NeXTSTEP/OpenStep and the GNUstep project, but these "desktops/environments/frameworks/systems" were one of the hottest stuff that happened during the 90s (along with OpenDoc) in trying to change the desktop as we know it today.

The "*step" systems were/are all based on Objective-C, which is a Smalltalk-like C dialect. It's actually based on a simple message-driven OO runtime written in C, decorated with a set of extensions to the C syntax that mimic Smalltalk message-passing style (object say:"Hello" to:thisPerson). Smalltalk being (in practice) not only a language but a whole environment, the language itself had an influence on how the "*step" systems were designed from a user perspective.

A couple of years ago some people coming from the GNUstep community started the Étoilé project, which is based on the same technology as the "*step" systems. While GNUstep seems to be quite busy trying to catch up with the Cocoa API constantly being updated by Apple (Cocoa is the successor of OpenStep), Etoilé took the path of innovation, trying to modernize and evolve the concepts into something new.

Here is Étoilé mission-statement (from their website):




Étoilé intends to be an innovative GNUstep based user environment built from the ground up on highly modular and light components with project and document orientation in mind, in order to allow users to create their own workflow by reshaping or recombining provided Services (aka Applications), Components etc. Flexibility and modularity on both User Interface and code level should allow us to scale from PDA to computer environment.




So far, I'm still waiting for a clear example on how all this "fits together", namely an illustrated explanation of how (we) users can reshape our worflow by recombining services (which is very much like OpenDoc when you add the document-centric perspective).




In the meantime, I've been quite impressed by some posts by David Chrisnall related to how he's trying to improve the Objective-C runtime (the GCC implementation being... well... look for yourself !) and to bridge Smalltalk and Objective-C.




I really like the double approach that the Étoilé people have : they design both at the language and at the interface level. As clearly stated in Ian Piumarta S3 presentation "Late-bound object lambda architectures", most of the current desktop systems/framework fail re-use (aka. re-invent the wheel) because the underlying language does not offer proper support for it. There is clearly a need to design both the API/architecture as much as the UI: APIs being "just another interface" for human-machine interaction.




Anyway, from a technical standpoint the approach is very seducing: Objective-C is a good base, it's well tested and now in use in many systems (Mac, iPhone,...). Now if you improve the runtime, plug LLVM in and allow to switch the syntax you have a pretty flexible and fast system, akin to the original Smalltalk vision.




I'd be personally really pleased to use a better Objective-C runtime library, take advantage of the (quite cool) Objective-C class library, have great performance (LLVM and C), and be able to plug the syntax I want. It seems like this is not too far away !