Add wrap, fill, refill methods to Options

[9999years]

These functions all take an Options as a parameter. I usually construct an Options and then use it for multiple calls, so it's more convenient for me to have access to these as methods.

[mgeisler]

Hi @9999years, thanks for the PR.

This change would make the API similar to what I had before version 0.13 from 2020. So I can fully understand why this API seems natural — I started out with the same one 😄

My feeling back then is summed up a bit in #213, but overall I was concerned about two things:

• a one-struct-to-rule-them-all in the form of Wrapper (back then) or Options (now). I wanted to avoid an always-expanding struct with more and more methods.
• having more than one way to call wrap, fill, and friends.

Since 2020, the library has also gotten some simple column wrapping functionality — but you didn't add those rarely-used methods to the Options struct here 😄 I would prefer not having to decide that is important enough to be added as methods to Options.

Does this seem reasonable?

[9999years]

Hmm. If we're talking about breaking changes in #521 already, here's my proposal:

• Options struct with methods for formatting functions (opts.wrap("foo"), opts.fill("foo"), etc.)
• Top-level formatting functions with default options (textwrap::wrap("foo"), textwrap::fill("foo"), etc.)

[mgeisler]

• Top-level formatting functions with default options (textwrap::wrap("foo"), textwrap::fill("foo"), etc.)

I don't think this will work: we need to know the correct wrapping width at the very least. The library could of course make an "opinionated" guess by using 80 columns or so, but I feel that won't be very popular with most people.

I will not add back the methods that were removed back in 2020 because of the problems I mentioned above. Overall, I hope the API of the crate can:

• support simple use cases using a very simple API: textwrap::fill("foo bar", 80).
• support medium-complexity use cases: textwrap::wrap(text, options).
• support complex use cases by implementing Fragment.

I feel the current API does this pretty well. Having to import both Options and wrap or fill seems okay to me.