Should wcwidth provide rjust, ljust, center and textwrap?

[jquast]

In the readme, we talk about the example of writing our own custom rjust function. If the most common use case is text alignment, let's just offer it as a public API. They would be the same name and signature as python's,

• https://docs.python.org/3/library/stdtypes.html#str.ljust
• https://docs.python.org/3/library/stdtypes.html#str.lstrip
• https://docs.python.org/3/library/stdtypes.html#str.center

And text-wrapping interface,

• https://docs.python.org/3/library/textwrap.html

I have previously added support of these (with terminal sequences) in blessed, https://github.com/jquast/blessed/blob/a34c6b1869b4dd467c6d1ab6895872bb72db7e0f/blessed/sequences.py#L141-L239

[dscrofts]

Definitely! I have implemented the ljust function as per the readme but it would be super convenient to have this already included.

[jquast]

On textwrap, there is a pretty strange edge-case found in downstream blessed library jquast/blessed#275 -- what should be done when wrapping wide characters to a column length of 1? We have no choice but to flow beyond column width. A width of "1" may not even be allowed, or allowed with caveats.

We must also be very careful not to split ZWJ and VS-16 sequences apart.