Figured I'd forward this over here, as it's pretty interesting stuff...
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Hey everyone,
I've been working on writing DBUS bindings for Mozilla Javscript. The
goal of this project is to make it possible for XUL and extension
developers to integrate with the Linux desktop.
The bindings are still in an early state and need lots of cleanup, but
already supports consuming existing services, creating new services,
signals, and xml introspection.
The API is very similar to the python bindings, here's an example of how
to query NetworkManager for interface information:
const NM_IFACE_INTERFACE = {
name: "org.freedesktop.NetworkManager.Devices",
methods: [ 'getName', 'getIP4Address',
'getActiveNetwork' ]
};
const NM_NETWORK_INTERFACE = {
name: "org.freedesktop.NetworkManager.Devices",
methods: [ 'getName' ]
};
var bus = DBUS.getSystemBus();
var nm = bus.getObject("org.freedesktop.NetworkManager",
"/org/freedesktop/NetworkManager",
NM_INTERFACE);
var devices = nm.getDevices();
for (var x = 0; x < devices.length; x++) {
var device =
bus.getObject("org.freedesktop.NetworkManager",
devices[x], NM_IFACE_INTERFACE);
var name = device.getName();
alert('Found interface: ' + name);
}
Specifying the interface methods is required because NM does not support
XML introspection. When querying a service that does, you can pass the
interface name as a string to getObject instead.
One of the goals from the start was to use XPCOM only as a bridge to the
C DBUS library. Everything else is implemented using Javascript.
Right now I'm looking for both general feedback, as well as someone to
review my code and suggest ways to clean it up.
The code is available via mercurial at
http://eric.extremeboredom.net/hg/mozjs_dbus/
A sample program is included that demonstrates network-manager,
notify-daemon, and avahi. To run, clone the code into top-level
'extensions' folder in an up to date mozilla-central and run from
dist/xpi-stage/mozjs_dbus/ using xulrunner. You'll need to pass
--enable-dbus to the moz configure script so that the library paths are
included.
Obligatory screenshots:
http://orion.extremeboredom.net/~eric/DropBox/libnotify-js.png
http://orion.extremeboredom.net/~eric/DropBox/mozjs_dbus_avahi_2.png
There was a project a while back called DBuzilla, which has been
abandoned. My library is much simpler because in addition to being much
less reliant on XPCOM, it makes use of glib, rather than re-implementing
all of the threading/mainloop integration stuff. I was, however, able to
re-use some of his data marshaling code, so it was not all for nothing.
I look forward to hearing back from people on this list!
Thanks,
Eric
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