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Re: Non-standard ledger lines and articulations collisions
From: |
David Kastrup |
Subject: |
Re: Non-standard ledger lines and articulations collisions |
Date: |
Wed, 10 Jan 2018 16:57:01 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) |
Paul Morris <address@hidden> writes:
> Here's my specific question. The docs say this for the Y-offset
> property of the Script object:
>
> |Y-offset| (number):
>
> |#<unpure-pure-container #<primitive-procedure
> ly:side-position-interface::y-aligned-side> #<primitive-procedure
> ly:side-position-interface::pure-y-aligned-side> >|
>
> The vertical amount that this object is moved relative to its Y-parent.
>
> http://lilypond.org/doc/v2.19/Documentation/internals/script
>
> But in the source code, in 'scm/define-grobs.scm', for the Script grob
> I see no mention of unpure-pure-container:
>
> (Y-offset . ,side-position-interface::y-aligned-side)
You are missing the difference between
ly:side-position-interface::y-aligned-side and
side-position-interface::y-aligned-side .
The latter is defined in scm/output-lib.scm as
(define-public side-position-interface::y-aligned-side
(ly:make-unpure-pure-container
ly:side-position-interface::y-aligned-side
ly:side-position-interface::pure-y-aligned-side))
> So am I missing something or are the docs off for Script.Y-offset?
The docs are autogenerated and cannot be off with regard to listed
default values.
> Is a call to "(ly:side-position-interface::y-aligned-side grob)"
> actually the default call to use?
You are better off with
(ly:pure-call side-position-interface::y-aligned-side grob start end)
or
(ly:unpure-call side-position-interface::y-aligned-side grob)
depending on what you need.
Or of course calling ly:side-position-interface::y-aligned-side and
ly:side-position-interface::pure-y-aligned-side directly.
--
David Kastrup