Installing Plasma.Service *.operations file

[Thomas Olsen]

On Thursday 23 December 2010 00:40:59 Aaron J. Seigo wrote:
> On Wednesday, December 22, 2010, Thomas Olsen wrote:
> > Except that it doesn't work until it's installed in
> > ~/.kde/share/apps/plasma/services. I thought I had messed up my code but
> > it works again after I copied it there.
> 
> no, that's quite wrong: packages should never install files outside of
> themselves ...
> 
>  bet the Python DataEngine bindings are messed up and don't check for the
> file in the "services" location.
> 
> *looks*
> 
> yes, that's it. *grumble*
> 
> the Javascript bindings have a class called JavaScriptService which does
> this:
> 
> void JavaScriptService::registerOperationsScheme()
> {
>     if (!m_dataEngine) {
>         return;
>     }
> 
>     const QString path = m_dataEngine.data()->filePath("services", name() +
> ".operations");
> 
>     if (path.isEmpty()) {
>         kDebug() << "Cannot find operations description:" << name() <<
> ".operations";
>         m_dataEngine.clear();
>         return;
>     }
> 
>     QFile file(path);
>     setOperationsScheme(&file);
> }
> 
> since the Service does not know about the DataEngine (and can't, at least
> not in a reliable fasion; it can be told about the DataEngine, but only
> after its too late .. and using the QObject hierarchy is just too error
> prone and would invalidate valid use cases where the DataEngine isn't an
> ancestor), the ScriptEngine needs to provide a service subclass that does
> as the above.
> 
> you may be able to work around that in your Python code by creating a
> Plasma::Service subclass yourself which does the above? it realy does
> belong in the Python ScriptEngine, in any case, but that's beyond my
> python mojo to do :)

I got it working but only with an ugly hack as seen below:

class UrlShortenerService(Plasma.Service):
    def __init__(self, engine):
        Plasma.Service.__init__(self, engine)
        self.engine = engine
        self.setName("urlshortener")

    def createJob(self, operation, parameters):
        return UrlShortenerJob(self.destination(), operation, parameters, self)

    def registerOperationsScheme(self):
        if not self.engine:
            print "UrlShortenerService. No engine found"
            return
            
        basename = self.name() + ".operations"

        # This doesn't work:
        #path = self.engine.package().filePath("services", basename)

        # This ugly hack works:
        path = self.engine.package().path() + "contents/services/" + basename
        if path.isEmpty():
            print "Cannot find operations description:", "%s.operations" % str(self.name())
            return

        ofile = QFile(path)
        self.setOperationsScheme(ofile)


BTW: You had m_dataEngine.data() and m_dataEngine.clear(). Neither of these seem to
exists, or am I working on the wrong object?

-- 
Best regards / med venlig hilsen

Thomas Olsen

Dropbox and my thumb drive had an epic battle. Dropbox won. http://db.tt/T0p6d6L
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