[Bug 467729] RFE: Add font autoinstallation support

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Thu Nov 20 07:19:19 UTC 2014

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--- Comment #25 from Frédéric Wang (:fredw) <fred.wang at free.fr> 2014-11-19 23:19:19 PST ---
(In reply to Karl Tomlinson (:karlt) from comment #24)
> Is the topic sufficient?  Could the subject be null?
> That would mean that some parameters are unnecessary and could be removed.

- I could do as in my previous patches and define my own XPCOM callback class,
but IIUC nsIObserver seems quite standard (even when not all the parameters are
used). For example in
we use one "observe" function to check all the notifications. That's also the
approach I've taken for the MissingFontsNotifier add-on

- The aSubject parameter could probably be null and so I can avoid passing it
to each callback functions. 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).

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