Add function to rename glyph

[mrk-z]

It'd be great to be able to edit the name of a glyph.

[justvanrossum]

Perhaps this is obvious, but I would like to hear your intuitive opinion about the following.

If you rename a glyph, what do you expect to happen to glyphs that use the to-be-renamed glyph as a component?

Should they be:

• updated
• not updated
• there should be a choice when renaming

[mrk-z]

I think a choice would be good to have.

I'm thinking there are two types of renaming:

• I simply want this glyph to be called another name, or there has been a mistake in the name and I want to correct it. In this case I'd expect the same glyph to be renamed everywhere.
• There are function changes to the naming (changing a suffix or something) : I want the current glyph to be something else, but other glyphs that are currently using this glyph as a component should still use a glyph with this name, so they should not change, and I would later create a new glyph with the old name.

If possible, I think it'd be good if the software can detect whether the current glyph is being used in another glyph as a component, and present a warning/choice only when it is. If the glyph is not used anywhere else and I see a warning, I'd be confused or worried.

[justvanrossum]

Would the second use case perhaps be better served with a "duplicate glyph" function?

[mrk-z]

Yes that would work too.