Growing SeedKit

SeedKit being more than a year old, now is a good time to do a retrospective, get an overview of what's coming next and where you could help.

By lowering the entry barrier for building, distributing and maintaining a Gnome application, the SeedKit project wants to attract new contributors and make current developers' life easier.
The approach taken is simple: let developers reuse their web UI development skills, tools and community.
Furthermore, the resulting UIs will be more flexible, eyes-pleasing and dynamic, thanks to the amazing progress of the HTML/CSS/JS threesome in WebKitGtk and Seed.

So where are we now ?

We currently provide an GTK widget rendering HTML/CSS/JS content where native libraries and services are accessible from the JavaScript context.
DBus services, GObjects or custom code can be invoked and/or bound to DOM elements data and events.
End result: building an HTML UI communicating with local lower level systems is now possible. This might prove a great alternative to Gtk+ or Clutter.

For the full-blown SeedKit applications (lets call them hybrid for a minute) scenario, a runtime environment is provided. For now it only consists of a simple launcher but will hopefully be augmented with a standard library and a set of guidelines (mostly following the HIG 3) to ensure consistency among hybrids and 'classic' applications.

So yeah, you can run your hybrid application on your computer... Great, but how does it fall and deploy in the hands of the end-user you might ask ?

That's what is coming next.
We have no intention to build a versioning, dependencies and provisioning management system from scratch. Thus hybrid applications should be easily installed from distributions channels, namely packages and repositories.
Thus templates for .desktop files, rpm specs and debian recipes will be added soon to make the packaging a breeze.
If you are a bored packaging wizard, drop by the seedkit-devel list, we need you!

Another missing piece is the aforementioned standard library. HTML alone is far from providing the high-level concepts required to express a user interface naturally (sliders, modal windows, tree, list for example). Web developers already provided solutions in the form of libraries like Mootool, JQuery or ExtJs.
jQuery and its UI widgets will become the favoured target and will be packaged with each application or depended upon if provided by distribution's package. Some help with converting Gtk's Adwaita CSS to jQuery-ui would be great.
Also, we'll build jQuery-esque convenience wrappers for common operations like signals/events connection, data binding, internationalization and files access.

The vision and execution are still in their infancy so now is the good time for you to get involved, shape them to your tastes and need and have fun building the next big thing together ! Gnome developers, designers, web developers, translators, bug hunters will be welcomed with open arms.

Lets get in touch at the the Desktop Summit in Berlin, I'll hopefully present SeedKit in a BoF session.

A plead for a SSB generator and execution environement for Gnome

This paper describes a proposed solution for a SSB system aimed at the Gnome Desktop. Having various web applications more tightly integrated within the user desktop would be a step toward the unification of the web and the native world.

What is an SSB ?

dixit Wikipedia : '
A site-specific browser (SSB) is a software application that is dedicated to accessing pages from a single source (site) on a computer network such as the Internet or a private intranet. SSBs typically simplify the more complex functions of a web browser by excluding the menus, toolbars and browser chrome associated with functions that are external to the workings of a single site.
'
What are the benefits of an SSB compared to standard browsing ?

• Space fully dedicated to web application content
• System integration (application launcher, notifications, menu, icon badges, local storage...)
• Standard windows' interaction, being handled by the WM/Shell

Existing Solutions
The SSB approach is already applied by several solutions, with diferents objectives and technical directon :

• Mozilla Prism : firefox extension allowing the creation of a SSB from the currently browsed web page. Of course, the execution environnement is built around Gecko.
• Fluid : standalone SSB creator and Webkit based execution environment with system integration (dock icon badges, Growl notification) and some goodies (userscripts, custom CSS)
• Adobe Air : Support application development using standard web technologies, beside Flash content. Embeds WebKit.

Proposed Solution

• a Webkit based SSB execution environnement, a chromeless WebView providing sytem integration
• An Desktop entry creator, following http://standards.freedesktop.org/desktop-entry-spec
• an Epiphany extension creating an SSB from the currently browsed Web App.

Desktop entry creator

• Generates .desktop file from user-defined values for the URL, the name and icon path of the SSB
• Provides right arguments to the execution environnement
• Defaults to Website favicon if no icon specified

Webkit based SSB execution environnement :

• One process per SSB
• Chromeless WebView
• Restricted access to the user-defined Web App domain
• Each SSB has their own cookie storage
• Use site specific javascript logic for system integration (ex: get the right value in the DOM for the number of unread messages to be displayed in the notification and/or badge)

System Integration implementation

• Applications launcher in Gnome menus
• Icon Badge (ex : number of unread mail)
• Notification system integration with libnotify using Seed or GtkWebkit DOM bindings ("You've got a mail")
• Application menu by generating specific GtkBuilder files and linking event using Seed or GtkWebkit DOM bindings
• Local storage, possibly Google Gears

The project will be hosted on Gitorious and welcome any contribution being code, documentation, or simply advices.

The first draft code will be commited sometime in the next week, the current state being nearly none :)