[orca-list] slow tree views

[Mike Gorse <mgorse alum wpi edu>]

Hi all,

While trying to fix evolution slowness with very large address books for 
my day job, I noticed that orca was also getting bogged down. I'm 
wondering if this has affected anyone else, with orca appearing to hang 
when focusing on a large tree view.

There was a bug with AT-SPI's caching of roles, and orca thought that the 
tree view was just a panel and proceeded to poke through what might be 
thousands of cells. On the gtk side, the atk role was originally set to 
ATK_ROLE_PANEL and later set to ATK_ROLE_TABLE. An event was fired, but 
the event was not being sent over dbus so that orca would see it.

I've fixed this in the master branch of at-spi2-atk, for anyone pulling 
from git. I'm debating whether to push this for 3.22.2 (although the code 
now works as intended, I'm slightly worried that it might cause slowness 
elsewhere through event floods).

If any of you test this, then I'd appreciate knowing whether it makes a 
difference either way.

Thanks,
-Mike