Terry J. Reedy added the comment:
Seems reasonable.
3 or more years ago, there was an issue about needing to define pairs like
Control-Key-c and Control-Key-C in order to have crtl + c/C-key work the same
regardless of the caps lock setting. I also remember that the effect of Caps
lock was system dependent. But I forget the details. We should find the issue
and document the system dependent rules, perhaps in config.py, perhaps in
config-keys.def.
Adding a new default key set will likely not be as simple as we wish. The
problem is the same one we had when adding a new default color theme last fall.
If one selects the new definition, older releases will try and fail to load
what is not there. Keys have a different backup logic than themes, including
the 'last resort fallback' in IdleConf.GetCoreKeys. With thems the result was
errors and or an exit. Have you, or can you check what happens if you select
'Modern Unix' and run an existing release.
If necessary, we can use the same workaround we did with theme, which is
described in the docstring for IdleConf.CurrentTheme. Part the theme patch was
making sure that all of the rest of IDLE accessed the current theme through the
rewritten CurrentTheme instead of through GetOption('main', 'Theme', ...).
I would like to add some unittests, but a manual test protocol is needed at
least to test an existing release. Tests should be run on each of the three
systems, and for each backported version. When we have a tested patch ready,
we could ask New to test on Mac, or do you have access to one now?
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