I had a upper-maxillofacial palate expansion surgery back in 1999. I think because I already had braces on I didn't have my jaw wired shut. I was not able to consume any solid food for about 2-3 months. You shouldn't expect to be in bed the whole time, but don't count on going to the gym either.
At the time I was not into working out like I am now, so I ate without any consideration for protein/carbs/ fat. I survived on Carnation instant breakfast shakes and just about anything that I could put in a blender. (fruit & graham crackers were my favorites)
At one of my lowest points I actually put a whopper and some fries in a blender with a strawberry milkshake. I did not end up eating it, but I honestly almost cried myself to sleep that night. At that point I was 7-8 weeks in and I had lost about 20-25 lbs. Not being able to eat any solid food really messes with your head.
My first solid food meal after all that was a heart-breaking steak dinner. i took maybe two bites and was full with an after-Thanksgiving-glow. Again, I almost cried myslef to sleep.. damned stomch shrinkage