Don't fold when file is short

[Artem Vasenin]

Feature description

Disable folding if the file is less than X lines long.

Describe the solution you'd like

I used to have the following code when I was using built-in folding, to disable folding for short files:

local autocmd = vim.api.nvim_create_autocmd
autocmd({ "BufReadPost" }, {
    callback = function(_)
        if vim.api.nvim_buf_line_count(0) > 70 then
            vim.opt.foldlevel = 1
        else
            vim.opt.foldlevel = 10
        end
    end,
})

Is it possible to accomplish the same with ufo?

If not, that would be a nice feature to have.

Additional context

Not much point folding parts, if the whole file already fits on the screen.

[Kevin Hwang]

nvim-ufo/doc/example.lua

Lines 113 to 127 in b0741a6

 local function applyFoldsAndThenCloseAllFolds(providerName) 
     require('async')(function() 
         local bufnr = vim.api.nvim_get_current_buf() 
         -- make sure buffer is attached 
         require('ufo').attach(bufnr) 
         -- getFolds return Promise if providerName == 'lsp' 
         local ranges = await(require('ufo').getFolds(bufnr, providerName)) 
         if not vim.tbl_isempty(ranges) then 
             local ok = require('ufo').applyFolds(bufnr, ranges) 
             if ok then 
                 require('ufo').closeAllFolds() 
             end 
         end 
     end) 
 end 

For now, run this snippet in BufReadPost and replace closeAllFolds with closeFoldsWith under the condition.

If users need this feature, upvote this feature.

[Will Moorby]

Just came across this issue while attempting to search for issues for an equal/opposite feature: "collapse all folds when file is larger than X lines".

Maybe a new feature could be created where a user can define 2 parameters, an upper and lower bound, or 1 parameter, that tells UFO to collapse/open all folds when the file is larger or smaller the given parameter(s).

I'm unsure if there is already a way to do this as I only found this plugin yesterday (and what a great plugin it is too).