AT-SPI, focus leaving and window IDs

[Samuel Thibault <samuel thibault ens-lyon org>]

Hi,

There are several things which should be added to AT-SPI to my mind:

- Focus leaving should be reported as well: else gnopernicus for
  instance would keep showing the last accessible widget's content while
  non-accessible windows are active. In that case, gnopernicus would
  then be able to show it can't access the non-accessible window (maybe
  at least show its title).

  It would also permit to launch several at-spi readers: brltty for
  instance now has an at-spi driver so as to be able to read xterms. But
  it needs to know exactly when the focus is on a terminal widget, in
  order to produce display only when needed.

- It would also be useful to be able to get widgets' X-window ID to
  better handle focus.

Regards,
Samuel