[Okular-devel] [patch] Add encrypted document support for Ooo

[Brad Hards]

I've finally gotten around to updating my earlier patch to provide KWallet 
support. See attached.
The encryption support adds an optional dependency on QCA2 - if that isn't 
found at compile time, you should get the old behaviour.

KWallet passwords should be interoperable with KWord.

I'm reasonably happy with this now, although there are a couple of issues I 
still want to resolve:
* I can't find an appropriate parent widget for some of the GUI operations 
that I need to do - it seems the TextDocumentConvertor doesn't expose one.
* There is an intermittent problem where okular sometimes won't load an 
encrypted document as the first document after start.

Naturally, the second problem is driving me insane. Only happens on one 
document that I have - okular looks like it is just hung loading. Works if I 
reload the same document. Works if I load something else first.

Feedback appreciated.

Brad

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