Hi,

I'm using xmonad with two equally-sized screens the left one of which I sometimes turn into pivot mode (rotate 90°) to read articles.
Now 'Tall' isn't great on a portrait monitor, so I'm looking for a layout modifier that acts as follows:

• If on the right monitor: No modification
• If on the left monitor:
• If in pivot mode, apply the Mirror layout modifier.
• Otherwise, apply the Reflect layout modifier.
  (because I like my master windows in the center)

Has anybody worked on something like this before?

If not, I'd try to write a contrib module, probably re-using some code from Actions.PhysicalScreens.
Any pointers / pitfalls to be expected?

kthx. Best,
Steffen