[Bug 467729] RFE: Add font autoinstallation support
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Thu Nov 20 08:11:17 UTC 2014
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--- Comment #26 from Karl Tomlinson (:karlt) <karlt at mozbugz.karlt.net> 2014-11-20 00:11:17 PST ---
(In reply to Frédéric Wang (:fredw) from comment #25)
> IIUC nsIObserver seems quite standard (even when not all the
> parameters are used).
Yes, nsIObserver is good.
> - The aSubject parameter could probably be null and so I can avoid passing
> it to each callback functions.
That was what I meant.
> However, if a caller launches two PackageKit
> commands using different nsIPackageKit instances, the aSubject parameter
> will allow to determine from which instance the callback is coming (this
> does not help if the same nsIPackageKit is used though).
There is usually only one instance of each xpcom service.
I assume multiple observers could be used to track the results of different
calls, if necessary.
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