Re: bug in lyric syllable magnetic snap

[Thomas Morley]

Am Mi., 22. Mai 2019 um 08:17 Uhr schrieb Alexander Kobel <address@hidden>:
>
> Hi Harm, hi all,
>
> On 22.05.19 01:20, Thomas Morley wrote:
> > Am Do., 16. Mai 2019 um 13:25 Uhr schrieb Alexander Kobel <address@hidden>:
> >>
> >> Hi David, hi Mike, hi all,
> >>
> >> I sometimes (still use Lilypond, and when I do, I typically use) your
> >> wonderful snippet for snapping "close" syllables into a single token. [...]
> >>
> >> Now I stumbled across an issue with that: two syllables are combined
> >> which are clearly far apart; see the attached screenshot and reduced
> >> working example from an actual engraving. It's not exactly minimal, but
> >> at least it's reasonably short and shows the problem. And the exact
> >> circumstances when the bug occurs are not clear to me, and it's somewhat
> >> sensitive to reduction.
> >>
> >> According to my tests, it's related to the facts that there is
> >>
> >> (1) a hyphen *before* the syllable "bor" in "ver -- bor -- gen" in the
> >> alto part;
> >>
> >> (2) a line break exactly there (moving the break "remedies" the
> >> problem); and
> >>
> >> (3) another voice/staff simultaneously (commenting out the soprano
> >> mitigates the issue as well).
> >>
> >> It's not, however, related to the accidental in the soprano, or the fact
> >> that the whole note in the lower voice is wider than the quarter in the
> >> upper voice (replacing d'1 by d'4*4 doesn't help).
> >>
> >>
> >> Any thoughts on what goes wrong here, and about a possible fix or
> >> workarounds?
>
> d'oh; I must have been tired as well. Obvious workaround: revert
> LyricWord.after-line-breaking (or override to ##f) at the problematic
> places. Of course, it's a manual workaround; but an automatic workaround
> would be a fix, right?
>
> > Hi,
> >
> > I tried to have a look at it ...
> >
> > Though, I'm too tired to be verbose, please refer to the pdf.
> > First a minimal, then some debugging output with a probably
> > significant difference. [...]
>
> Thank you, that's what I should have done immediately when posting;
> sorry about that.
>
> You forgot to attach the PDF, but I have an idea about what you did and
> observed, and what significant difference you point to; I'll try to
> investigate further as soon as possible.
>
>
> Thanks again,
> Alex
>

Hi,

probably I've found a fix.

See attached files. There's a change-log on top of the .ily-file.
Main thing is to exclude LyricHyphens without stencil form iterating.

Not sure if the core "magnetic-snapping"-functionality isn't disturbed.
Please test thoroughly.

Cheers,
  Harm

test-harm.pdf
Description: Adobe PDF document

lyric-syllable-magnetic-snap-harm.ily
Description: Binary data