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List:       koffice-devel
Subject:    Re: Solution for absurd filter chains
From:       Thomas Zander <TZander () factotummedia ! nl>
Date:       2004-10-03 14:16:33
Message-ID: 20041003141633.GB18193 () factotummedia ! nl
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As I explained a year ago, a weight for each filter, and a maximum weight a
filter-chain can take is the easiest and best solution to this problem.
With each filter getting an individual weight, its very powerful.

Its not clear to me how your solution would be better (I don't even get
that it would stop long chains while allowing non-aburt, but very long
chains)

On Sun, Oct 03, 2004 at 03:30:05PM +0200, Nicolas Goutte wrote:
> Since the change of the filter system (for KOffice 1.2), the filter manager 
> allows absurd filter chains like:
> KSpread -> plain text -> KWord -> Latex
> 
> As replacing again the filter system is going to be hard and as we are moving 
> to OASIS, it is also not much the time for a big rewrite in this code.
> 
> I had thought long about simple solution and I had the idea of a kind of 
> namespaces (KWord, KSpread...) but I had not any good idea how to implement 
> it until now.
> 
> Now I have thought about extended mimetypes, like
> text/plain;kword
> so that especially text/plain can be differenciated.
> 
> I think the best would be to add 2 new entries to the .desktop files of 
> filters, adding the namespace at input and at output. (It can be different, 
> see the KPresenter to KWord filter.)
> 
> As far as I see, this method would stop absurd filter chains without limit any 
> other feature of the current filter systems, like very long filter chains.
> 
> Also the seems to allow not to need changes to the code of each filter, only 
> the filter system code seems to need changes.
> 
> Have a nice day!

-- 
Thomas Zander

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