Centering after animation

[hacker-DOM]

Hi. Firstly thx for the excellent plugin. I would like to center my screen after every animation. Based on the docs, I figured this would do the trick:

require('neoscroll').setup({
    post_hook = function(info) vim.cmd [[ normal zz ]] end
})

but it doesn't seem to work. I also tried exe "normal zz" instead ☁️

[jrnxf]

i also tried the same thing with no luck 😢

[znd4]

this is working for me:

require("neoscroll").setup({
    post_hook = function(info)
        vim.cmd("normal! zz")
    end,
})

I have a feeling that there's a way to use neoscroll.zz here, although obviously infinite recursion is a concern there xD

EDIT: the behavior still isn't really ideal -- it's exactly what I want for <C-d> and <C-u>, but it basically disables zt, zb, <C-e>, and <C-y>.

[znd4]

Spent a few hours on this -- I'd recommend tweaking the specific numbers / easing function:

local neoscroll = require("neoscroll")

local easing = "sine"
local zz_time_ms = 100
local jump_time_ms = 200

neoscroll.setup({
    post_hook = function(info)
        if info ~= "center" then
            return
        end

        -- The `defer_fn` is a bit of a hack.
        -- We use it so that `neoscroll.init.scroll` will be false when we call `neoscroll.zz`
        -- As long as we don't input another neoscroll mapping in the timeout,
        -- we should be able to center the cursor.
        local defer_time_ms = 10
        vim.defer_fn(function()
            neoscroll.zz(zz_time_ms, easing)
        end, defer_time_ms)
    end,
})

local mappings = {}

mappings["<C-u>"] = { "scroll", { "-vim.wo.scroll", "true", jump_time_ms, easing, "'center'" } }
mappings["<C-d>"] = { "scroll", { "vim.wo.scroll", "true", jump_time_ms, easing, "'center'" } }

require("neoscroll.config").set_mappings(mappings)

[kohane27]

@zdog234 Thank you for creating this hack, it works with your config, but the scroll speed is too fast for my eyes. I've tried to tweak the number but the following happens:

https://user-images.githubusercontent.com/57322459/209611462-e6077f34-0131-4862-9aad-bd59ea51ad1d.mp4

Basically it'd start to center with zz before the scrolling is done. It only happens when I scroll at the top of the file, not when the cursor is already centered. I tried tweaking but to no avail. Then I found cinnamon.nvim and with its built-in centered = true I no longer have the above weird issue. Thanks guys!