[API CHANGE] a11y: Switch AccessibleRelationType to enum

Switch css::accessibility::AccessibleRelationType
from integer constants to an enum.

This provides more type safety and improves the debugging
experience, e.g. GDB now prints

com::sun::star::accessibility::AccessibleRelationType::AccessibleRelationType_CONTENT_FLOWS_TO

instead of just "2" when printing the value of a
corresponding variable, so it's no longer necessary
to manually look up what constant has that integer
value to know what relation this refers to.

offapi/com/sun/star/accessibility/AccessibleRelationType.idl
had this comment:

> <p>We are using constants instead of a more typesafe enum.  The reason
> for this is that IDL enums may not be extended.  Therefore, in order to
> include future extensions to the set of roles we have to use constants
> here.</p>

However, the a11y UNO API is internal (not published),
so that shouldn't be a concern.

Change-Id: I44a7d56cb085dc24effb24fcd34bb222b78ef4cd
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/176153
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Tested-by: Jenkins

0 files changed, 0 insertions, 0 deletions