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AT-SPI 3 roadmap
================
This document is a place to collect changes that we should consider for a
future version of the API.
- Remove ATSPI_COORD_TYPE_SCREEN. It cannot be supported under Wayland.
- Remove the legacy device event controller API. AtspiDevice should handle
things related to the keyboard and mouse.
- Eliminate the registry daemon. The new device API no longer uses it for
key grabs (except for the existing legacy back end), and the mouse could
similarly be handled in-process. Aside from the device event controller,
the registry daemon currently keeps a list of applications and registerd
events, but querying applications could be done with a DBus signal that
applications could then respond to, and applications could similarly
query consumers for a list of events that they care about.
- The DBus API for sending events should be reviewed. All events in the
`xml/Event.xml` file return items with the same "siiva{sv}" signature
when it is not necessary. Take for example "StateChanged", which only
uses the first two variables: a string of the state which has been
changed, and a signed integer that may be either 1 or 0 depending on
if the state has been added or removed. For one thing, it is clear that
the second argument for "StateChanged" should be "b" for bool, and
secondly the arguments "iva{sv}" do not seem to be used at all for this
event, and subsequently could be dropped. This is only the example of
one event with issues like this. Nearly every event has a similar case
of some unused fields, or fields that don't *exactly* match the
semantics of their type sent over DBus.
- ChildCount and GetChildAtIndex could have unsigned arguments (#106).
- For the Collection interface, roles are signed, but they are unsigned
elsewhere (#108).
- For the Collection interface, states are signed, but they are unsigned
elsewhere (#109).
- The AtspiEventListener API is hard to use and also needs to be reworked.
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