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Re: convert-ly produces invalid output for KeySignature.c0-position

From: David Kastrup
Subject: Re: convert-ly produces invalid output for KeySignature.c0-position
Date: Wed, 19 Jun 2013 11:29:04 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux)

Pavel Roskin <address@hidden> writes:

> Quoting David Kastrup <address@hidden>:
>> Small wonder.  I thought our default use of symbols matched our naming
>> rules, but that one's an exception.
>> We can make an exception for convert-ly here, but that's not a
>> satisfactorily final solution.
>> I propose renaming it.  Suggestions?
> I'm fine with renaming.  We have Staff.middleCPosition.  Perhaps the
> same name could be used in KeySignature.
> On the other hand, we don't care where the _middle_ C is positioned.
> We only need to know where _some_ C is positioned to decide how to
> print the key signature.  Then "middle" could be dropped.
> By the way, setting KeySignature.c0-position with \override doesn't
> work.  I had to resort to setting it in Scheme:

Given the analysis in a longer mail, I revert my opinion that we need to
do something here.  c0-position for the relevant grobs _can't_ be set by
overrides or tweaks.  Renaming it to middleCPosition would likely cause
more confusion.  What _is_ wrong is that the Internals Reference calls
it a user property: as far as I can see, it is for internal use only.
The question is where this distinction is established.

David Kastrup

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