This refactors even more the edje part eo internals. But now
common part APIs can easily be implemented in edje_part.c
The API now looks like:
efl_gfx_geometry_get(efl_part(edje, "part"), &x, &y, &w, &h)
1. Make internal part "real_part_set" an internal function (EO)
2. Use a common class rather than an interface:
- Cost: 1 extra call to efl_data_scope_get() as we don't have
the data inside the EO function call implementation.
- Gain: Ability to implement common code, such as part_geometry_get
This lets me narrow down the remaining cases of pointers across the EFL.
The void pointers will later need to be reevaluated on per-case basis and
replaced appropriately where possible/feasible.
This touches Edje and also Elementary where part names are used.
This commit blew up in size since now all content part APIs
(get, set, unset) require to use Efl.Part instead.
This is a big refactoring commit, but no logic should
have been changed. Fingers crossed.