Re: [Lilypond-auto] Issue 4040 in lilypond: Dots ignoring shifted ledger lines

[lilypond]

Comment #5 on issue 4040 by address@hidden: Dots ignoring shifted  
ledger lines
https://code.google.com/p/lilypond/issues/detail?id=4040

Here are some more details.  In lily/staff-symbol.cc, Staff_symbol::on_line  
checks whether a note (or rest, I assume...) at a given staff position  
falls on a line or not.  This is used to determine whether to shift the  
dots on dotted notes up to avoid collisions with staff and ledger lines  
(among other things).

Previously Staff_symbol::on_line was not aware of custom ledger line  
positions, and that was causing this issue (4040).  This patch makes  
Staff_symbol::on_line aware of custom ledger lines.

Standard staff and ledger lines are handled the same as before.  For custom  
staff and ledger lines the existing functions Staff_symbol::line_positions  
and Staff_symbol::ledger_positions are used to get the lines for a given  
staff position, and then iterate through them to determine whether notes at  
that staff position fall on a line or not.

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