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[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #4633 MMR wron

From: Auto mailings of changes to Lily Issues via Testlilyissues-auto
Subject: [Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #4633 MMR wrong glyph
Date: Tue, 26 Dec 2017 19:22:06 -0000

I would like to try to fix this if I understood what was going on here. I’ll try to sum up what I’ve understood so far:

A MMR grob reads the grob property measure-length instead of the context property measureLength (as it was done before the commit trevor refers to). The property measure-length is set depending on measureLength in Paper_column_engraver::process_music().

This works fine when the Timing_translator is moved to the Staff contexts and Staff contexts aren’t explicitely created by the user. It doesn’t work if a Staff context is explicitely created (even when the Timing_translator isn’t only moved in a \layout block but also in a \with block for that same Staff).

Looking at some debug output I added, I saw that measure-length is always 1 if the Timing_translator is moved, so probably Paper_column_engraver::process_music() is called too late? (it’s not called less times)

[issues:#4633] MMR wrong glyph

Status: Accepted
Created: Fri Oct 09, 2015 11:38 AM UTC by Palmer Ralph
Last Updated: Fri Oct 16, 2015 08:09 PM UTC
Owner: nobody

Simon Albrecht wrote :

in the following snippet the MMR should be displayed with the "rests.M1" glyph (vertical bar between two staff lines). But with Timing_translator moved to staff level, this works only if the staff is not explicitly instantiated (uncomment \new Staff to test), else the whole rest glyphs are used.

\version "2.19.27"

voiceOne = \relative {
  \time 4/2

\score {
  % comment to trigger bug
  \new Staff

\layout {
  \context {
    \remove "Timing_translator"
  \context {
    \consists "Timing_translator"

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