Swap across/down plugin corrupts puzzle grid

[jpd236]

The swap across/down plugin seems to be broken, at least on Mac.

One issue is that it calls a "SwapDirection" function which appears to have been renamed to "InvertDirection" in cb8e5c8.

However, even with that resolved, the grid ends up in a broken state after the swap. Grid numbers shift around as you click through the grid; the selected square doesn't always get highlighted; filled in answers can disappear.

(Given that this plugin folder begins with a "_", it seems like it might have been shelved and thus bitrotted... but I don't see anything at first glance that actually strips out such plugins from release builds. Will file a separate bug for that).

[mrichards42]

Yeah, it's definitely old and broken. I think this was written when the puz library was a lot simpler. I'm sure it would be possible to make it work again, but the novelty wore off pretty quickly, and I didn't bother.