The original item is part of the array, so give it a number
and put it in the right place (all current array tools have
a null transform for the first item, but it's not part of the
contract. For example, a circular array with an angle offset
might want to move the first point).
The current module cannot be queried for existing pads as we
add them (because we never commit, until we finish the whole array).
Instead, pre-gather the names and check as we add, skipping any existing
names.
Note: this will not prevent arrays becoming "mis-ordered", but there
is not a lot we can do to prevent all possible errors.
Fixes: 1808706
* https://bugs.launchpad.net/kicad/+bug/1808706
The same principle could be used to skip existing ref-des'es on PCBs.
The geometry and numbering logic is separate to the dialog, and
can be separated for clearer logic and better testability.
Moreover, refactor it to avoid any dependency on pcbnew
classes, so it can be move to common for potential re-use in
eeschema and friends in future.
Also convert all wxPoint logic in these classes to VECTOR2I and
fix some function visibilities.
Add some unit tests of the ARRAY_OPTIONS geometry and numbering.
Devolve the logic as to whether a pad should be numbered or not
to a pad utility function. Add a very simplistic test for this
function (demonstrating how to test BOARD_ITEMs in general).
Fixes: lp:1804787
* https://bugs.launchpad.net/kicad/+bug/1804787
John Beard
Jeff Young
Maciej Suminski
jean-pierre charras
Tomasz Wlostowski