Does anyone use math inset locking?

[Jean-Marc Lasgouttes]

Le 05/12/2023 à 20:40, Scott Kostyshak a écrit :
> I came across what I thought was a bug. In the attached, if I put the
> cursor just inside the note and press ctrl + i for inset-toggle, I
> expected the note to close.
> 
> I looked around in the code, and I found an interesting chunk in InsetMathNest.cpp:
> 
> 	// 'Locks' the math inset. A 'locked' math inset behaves as a unit
> 	// that is traversed by a single <CursorLeft>/<CursorRight>.
> 	case LFUN_INSET_TOGGLE:
> 		cur.recordUndo();
> 		lock(!lock());
> 		cur.popForward();
> 		break;
> 
> I don't know if that is actually related to the issue I was looking at,
> but I had never heard of this feature. Does anyone use it? Can someone
> give me an example of a case where it is used? Is it indeed saved in the
> file format? I think I might find this feature useful.
> 
> It is fun to discover new features no matter how long I've been around LyX.

I think it is a very old feature from André's era, I thought it was not 
working anymore, and it seems inded that it is broken.

Shall we salvage it, or kill it? It can also be used inside formulas in 
theory.

JMarc