setup cmp window, item.abbr maxwidth and minwidth

[Song-Tianxiang]

Sometimes, cmp completion window, item.abbr too long. this commit can restrict item.abbr width. Maybe the default maxwidth and minwidth can be adjust.

before:

after:

[siduck]

is there not a better way to do this :/ , i dont like such computations in cmp config as it'd render on every keystroke!

[lucario387]

It's looking way too similar to this hrsh7th/nvim-cmp#980 (comment)

[Song-Tianxiang]

is there not a better way to do this :/ , i dont like such computations in cmp config as it'd render on every keystroke!有没有更好的方法来做到这一点：/，我不喜欢 cmp 配置中的此类计算，因为它会在每次击键时呈现！

I think there's two ways to solve:

1. set a constant number but less flexible
2. compute once and save it, but since vim.o.columns would updated when window resiezed, maybe we need a autocmd VimResized

[Song-Tianxiang]

It's looking way too similar to this hrsh7th/nvim-cmp#980 (comment)它看起来和这个太相似了 hrsh7th/nvim-cmp#980 (comment)

shamelessly stole from there

[lucario387]

au VimResized with a variable storing the width will be better (if it's possible)

[Song-Tianxiang]

I have added an option cmp.format_abbr.
the current nvconfig.ui.cmp is

    cmp = {
        icons_left = false, -- only for non-atom styles!
        lspkind_text = true,
        style = "default", -- default/flat_light/flat_dark/atom/atom_colored
        format_colors = {
            tailwind = false, -- will work for css lsp too
            icon = "󱓻",
        },
        format_abbr = {
            maxwidth = 20,
            minwidth = 10,
        }
    },

How about make it look like:

    cmp = {
        icons_left = false, -- only for non-atom styles!
        lspkind_text = true,
        style = "default", -- default/flat_light/flat_dark/atom/atom_colored
        format = {
            colors = {
                tailwind = false, -- will work for css lsp too
                icon = "󱓻",
            },
            abbr = {
                maxwidth = 20,
                minwidth = 10,
            }
        },
    }

Its' more clean but not back compatiable (we need to use cmp.format_colors or cmp.format.colors).

There's maybe other cmp.format.[something] in the future though.

[siduck]

ugh i dislike such large & complex changes :/

cant we just use string:sub?

[Song-Tianxiang]

I don’t think I can come up with a better solution...

[Song-Tianxiang]

Does adding this autocmd make the code seem too complex to you? The entire cost of this commit is that for each completion item, it needs to determine if it is too long, which is an unavoidable cost. The cost of the autocmd is almost negligible.

[siduck]

dont close this yet, i dont think the autocmd is much of useful, I want the user to keep a fixed maxwidth. not depending on the nvim's window size.