DDMAL
Neon won't allow you to create an oblique bigger than a fifth
The normal behaviour for creating an oblique is as follows:
- Select two consecutive puncta with the neume component tool;
- Click on "toggle ligature";
- The two puncta become an oblique;
- The end.
However, I've just come across an oblique that covers an interval of a sixth and I'm having some problems. Here's how to reproduce that:
- Input two new puncta that are at least 6 notes apart, and group them with the neume and neume component tools;
- Select the two neume components and click on "toggle ligature";
- No oblique will appear. Instead, the lower punctum should hop to align vertically with the upper one. If you move either puncta around, the other will hop up one pitch. Here's a demo:
https://user-images.githubusercontent.com/83373378/225623422-cd0a4895-f27d-4576-927c-edb9322227e4.mov
Additional fact: in the MEI file, the two neume components are ligated. They just don't show up as such in Neon.
This bug is very uncommon (I'd never seen such a long oblique before), but when it happens I have no way to work around it.
How weird! Also, haven't we seen this vertical alignment and/or hopping behaviour in some bug before? (t might have a related solution, if I could only think of what it was!)
Puncta within an oblique hopping around were first recorded wayyyyyyy back, when we couldn't toggle a ligature that had already been toggled once. Ungrouping a neume that contained an oblique would result in the oblique becoming un-ligated and the lower punctum hopping to align with the upper one, as is happening here. This is detailed here: https://github.com/DDMAL/Neon/issues/641#issuecomment-856943308.
Something apparently identical also happened in the times when we couldn't group an oblique with puncta on either side of it: https://github.com/DDMAL/Neon/issues/792.
Finally, something similar happened when we couldn't have two obliques in a row: https://github.com/DDMAL/Neon/issues/741. In this case however, puncta and obliques would behave much more erratically, so I don't know if it's the same thing.
I've checked smufl. It doesn't have the font for obliques bigger than a fifth. This is why neon acts weird when the user tries to create one. One possible solution would be adding a check before creating a new ligature.
