How can I make it look equal to its configuration

[CRAG666]

Currently my line looks like this and I would like it to be seen as yours

[kevinhwang91]

1. vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep: ,foldclose:]]
2. vim.o.foldcolumn = '1'
3. need this PR feat(folds): add 'foldoptions' option neovim/neovim#17446 , this PR only changes a few lines, but you must compile the code by yourself.

I will add the note under demo later.

[kevinhwang91]

Actually I haven't used that PR, I hacked myself a long ago, and found that PR recently.

diff --git a/src/nvim/screen.c b/src/nvim/screen.c
index 2ee7cd44f..8982bd2ee 100644
--- a/src/nvim/screen.c
+++ b/src/nvim/screen.c
@@ -1931,12 +1931,8 @@ static size_t fill_foldcolumn(char_u *p, win_T *wp, foldinfo_T foldinfo, linenr_
     if (foldinfo.fi_lnum == lnum
         && first_level + i >= foldinfo.fi_low_level) {
       symbol = wp->w_p_fcs_chars.foldopen;
-    } else if (first_level == 1) {
-      symbol = wp->w_p_fcs_chars.foldsep;
-    } else if (first_level + i <= 9) {
-      symbol = '0' + first_level + i;
     } else {
-      symbol = '>';
+      symbol = wp->w_p_fcs_chars.foldsep;
     }
 
     len = utf_char2bytes(symbol, (char *)&p[char_counter]);

[CRAG666]

Tanks

[hisamafahri]

@CRAG666 @kevinhwang91 How to remove the number '2' sign in the image above?

[kevinhwang91]

For now, must compile Neovim source code.

[bandithijo]

How to remove the number '2' sign in the image above?

@hisamafahri
You need to modify the file src/nvim/screen.c in source code with the diff sample above #4 (comment) and recompile.
The indent level number indicator will be gone.

[data-stepper]

I have found a temporary workaround for this issue, if you set foldcolumn='5' (or some other higher number than 1), it will not show the digits for lower level folds.

Only this way you have to live with the bigger column on the left side, which I actually kind of like since it also shows you the fold levels by shifting the little markers correctly.

[ruanyouxing]

What font have you used?
The icon is just too small to clickable

[kevinhwang91]

What font have you used? The icon is just too small to clickable

cat alacritty.yml

font:
  normal:
    family: Hack Nerd Font

Search chevron in https://www.nerdfonts.com/cheat-sheet

[ruanyouxing]

thanks a lot

[p00f]

▼ for foldopen and ⏵ for foldclose are unicode (work without nerd fonts)

[cathaysia]

How do I change the color of filechars?

[kevinhwang91]

How do I change the color of filechars?

h FoldColumn

[kevinhwang91]

I am trying my best to imp #24 which I think is better than VSCode UI. Suggestions are welcome.

[diego-treitos]

if you set foldnestmax to a number equal or lower than the foldcolumn (i.e. both to 2) it won't show the ugly numbers

[twnaing]

I thought the number displayed is a bug. After reading this, I understand it is a feature.

[diego-treitos]

Yes, it is a feature. However, at least for me, the problem is that there isn't seem to be a way to configure the fold columns to resize dynamically as they are needed. You either have:

• As many columns as possible folds in the file: This means that in a file with 7 levels of folds, when you open it it will show 7 fold columns despite only having symbols in the first column (folds are closed).

• A fixed number of columns: This means that the numbers in the fold columns will appear unless you also limit the number of folds in the file to the number of fold columns.

If I am wrong about this please anybody let me know :)

[alex-popov-tech]

@kevinhwang91 hey! if i don't want to recompile nvim, can i disable foldcolumn until PR is merged? i tried to set it to 0, and on starting screen it is 0, but when entering some file buffer it resets to 1 with those fold levels in digits :(

[kevinhwang91]

@kevinhwang91 hey! if i don't want to recompile nvim, can i disable foldcolumn until PR is merged? i tried to set it to 0, and on starting screen it is 0, but when entering some file buffer it resets to 1 with those fold levels in digits :(

Sure. 0 is recommended if don't compile nvim. Write down o.foldcolumn = '0' in init.lua and check out which script changes your foldcolumn.

[alex-popov-tech]

i did that, tho i thought it was your plugin who does this :D even tho i didn't find such code in repo...okay, thank you, i will try to use some rg in plugins dir to find who is changing that, thank you!

[WhiteBlackGoose]

Update of the patch from above:

From b9de2d3eddac3cc9bd2c03f8adaca13b0da14fef Mon Sep 17 00:00:00 2001
From: WhiteBlackGoose <wbg@angouri.org>
Date: Sat, 3 Dec 2022 21:47:29 +0300
Subject: [PATCH] folding UI made nicer

---
 src/nvim/screen.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/nvim/screen.c b/src/nvim/screen.c
index 865520657..52d619fff 100644
--- a/src/nvim/screen.c
+++ b/src/nvim/screen.c
@@ -215,12 +215,8 @@ size_t fill_foldcolumn(char_u *p, win_T *wp, foldinfo_T foldinfo, linenr_T lnum)
     if (foldinfo.fi_lnum == lnum
         && first_level + i >= foldinfo.fi_low_level) {
       symbol = wp->w_p_fcs_chars.foldopen;
-    } else if (first_level == 1) {
-      symbol = wp->w_p_fcs_chars.foldsep;
-    } else if (first_level + i <= 9) {
-      symbol = '0' + first_level + i;
     } else {
-      symbol = '>';
+      symbol = wp->w_p_fcs_chars.foldsep;
     }
 
     len = utf_char2bytes(symbol, (char *)&p[char_counter]);
-- 
2.38.1

FWIW I decided to maintain my fork of neovim. If I'm not lazy, I will make it autorelease

[okuuva]

@EtiamNullam

If you didn't notice @kevinhwang91 is the owner of this repo, so I think he is talking about lack of plans for implementing statuscolumn hacks in nvim-ufo, as he finds it unproductive.

I did, I just asked to clarify things for myself since I don't want to assume anything.

@kevinhwang91

Local, don't want to open it now, I just give statuscolumn a try to make it work perfectly with ufo.

Ok, got it now. Thank you for your awesome work 🙏🏼

[mehalter]

One thing I've noticed is using the foldlevel of the current line and the previous line is not sufficient when there are 2 different folds (one ending and one immediately starting) of the same level it is unable to tell that the previous fold has finished. The original image shared in this issue is a good example of several level 2 folds in a row.

This makes the statuscolumn extremely insufficient at identifying folds without the addition of new functions

[kevinhwang91]

luukvbaal/statuscol.nvim#3

[Racle]

luukvbaal/statuscol.nvim#3

One of the easiest solutions.

Here's quick config which works for me:

    -- packer
    use {
      "kevinhwang91/nvim-ufo",
      requires = {
        "kevinhwang91/promise-async",
        {
          "luukvbaal/statuscol.nvim",
          config = function()
            local builtin = require("statuscol.builtin")
            require("statuscol").setup(
              {
                relculright = true,
                segments = {
                  {text = {builtin.foldfunc}, click = "v:lua.ScFa"},
                  {text = {"%s"}, click = "v:lua.ScSa"},
                  {text = {builtin.lnumfunc, " "}, click = "v:lua.ScLa"}
                }
              }
            )
          end

        }
      }
    }

and

vim.o.foldcolumn = "1" -- '0' is not bad
vim.o.foldlevel = 99 -- Using ufo provider need a large value, feel free to decrease the value
vim.o.foldlevelstart = 99
vim.o.foldenable = true
vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep: ,foldclose:]]

-- these are "extra", change them as you like
vim.keymap.set("n", "zR", require("ufo").openAllFolds)
vim.keymap.set("n", "zM", require("ufo").closeAllFolds)

-- Option 3: treesitter as a main provider instead
-- Only depend on `nvim-treesitter/queries/filetype/folds.scm`,
-- performance and stability are better than `foldmethod=nvim_treesitter#foldexpr()`
require("ufo").setup(
  {
    provider_selector = function(bufnr, filetype, buftype)
      return {"treesitter", "indent"}
    end
  }
)

[rsdubtso]

Hi, how do I enable the vertical indentation/folding level indicators?

[rockyzhang24]

@rsdubtso Put set foldcolumn=1 in your nvim config. For lua, use vim.o.foldcolumn = '1' instead. For more details, see :h foldcolumn.

If this is not what you need, may I ask what you mean by vertical indentation/folding level indicator? Can you attach a pic please?

[rsdubtso]

Thanks! Sorry, I should have been more clear, I mean the vertical indicators inside the text, like on this picture:

[Racle]

@rsdubtso I've been using indent-blankline.nvim with folliwing config:

require("indent_blankline").setup {
  char = "▏",
  buftype_exclude = {"terminal"},
  show_trailing_blankline_indent = false,
  show_current_context = true,
  filetype_exclude = {"help", "terminal"},
  -- default : {'class', 'function', 'method'}
  context_patterns = {
    "class",
    "function",
    "method",
    "^if",
    "^while",
    "^for",
    "^object",
    "^table",
    "^type",
    "^import",
    "block",
    "arguments"
  }
  -- disabled now for performance hit.
  -- use_treesitter = true
}

[rockyzhang24]

@rsdubtso That's implemented by other plugins, not nvim-ufo. Please check indentLine, or indent-blankline.

[rsdubtso]

D'oh! Thanks a lot!. Hope this discussion is at least somewhat useful for future readers...

[AGou-ops]

neovim v0.9.0 src/nvim/screen.c --> src/nvim/drawline.c.

About line 421.

 418   for (i = 0; i < MIN(fdc, level); i++) {
 419     if (foldinfo.fi_lnum == lnum
 420         && first_level + i >= foldinfo.fi_low_level) {
 421       symbol = wp->w_p_fcs_chars.foldopen;
 422     } else if (first_level == 1) {
 423       symbol = wp->w_p_fcs_chars.foldsep;
 424     } else if (first_level + i <= 9) {
 425       symbol = '0' + first_level + i;
 426     } else {
 427       symbol = '>';
 428     }

[pedropombeiro]

@kevinhwang91 Now that Neovim 0.9.0 is out, what is the right way to enable this look?

[rockyzhang24]

@pedropombeiro Now the plugin statuscol.nvim is stable enough and is worth a trying. The alternative approach is to change the code in screen.c (that was refactored and renamed to drawline.c) directly and build neovim by yourself.

[jellydn]

Here is my entire UFO + Folding preview config, just in case someone needs this.

1. Setup folding option

-- UFO folding
vim.o.foldcolumn = "1" -- '0' is not bad
vim.o.foldlevel = 99 -- Using ufo provider need a large value, feel free to decrease the value
vim.o.foldlevelstart = 99
vim.o.foldenable = true
vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep: ,foldclose:]]

2. Install the plugin with lazy.nvim

return {
  -- UFO folding
  {
    "kevinhwang91/nvim-ufo",
    dependencies = {
      "kevinhwang91/promise-async",
      {
        "luukvbaal/statuscol.nvim",
        config = function()
          local builtin = require("statuscol.builtin")
          require("statuscol").setup({
            relculright = true,
            segments = {
              { text = { builtin.foldfunc }, click = "v:lua.ScFa" },
              { text = { "%s" }, click = "v:lua.ScSa" },
              { text = { builtin.lnumfunc, " " }, click = "v:lua.ScLa" },
            },
          })
        end,
      },
    },
    event = "BufReadPost",
    opts = {
      provider_selector = function()
        return { "treesitter", "indent" }
      end,
    },

    init = function()
      vim.keymap.set("n", "zR", function()
        require("ufo").openAllFolds()
      end)
      vim.keymap.set("n", "zM", function()
        require("ufo").closeAllFolds()
      end)
    end,
  },
  -- Folding preview, by default h and l keys are used.
  -- On first press of h key, when cursor is on a closed fold, the preview will be shown.
  -- On second press the preview will be closed and fold will be opened.
  -- When preview is opened, the l key will close it and open fold. In all other cases these keys will work as usual.
  { "anuvyklack/fold-preview.nvim", dependencies = "anuvyklack/keymap-amend.nvim", config = true },
}

Demo:

[awerebea]

Let me join the party and share my config with one small extra "feature" of displaying the number of hidden rows near the colorcolumn or window edge (whichever is smaller).

return {
  "kevinhwang91/nvim-ufo",
  dependencies = "kevinhwang91/promise-async",
  event = "VeryLazy",
  opts = {
    -- INFO: Uncomment to use treeitter as fold provider, otherwise nvim lsp is used
    -- provider_selector = function(bufnr, filetype, buftype)
    --   return { "treesitter", "indent" }
    -- end,
    open_fold_hl_timeout = 400,
    close_fold_kinds = { "imports", "comment" },
    preview = {
      win_config = {
        border = { "", "─", "", "", "", "─", "", "" },
        -- winhighlight = "Normal:Folded",
        winblend = 0,
      },
      mappings = {
        scrollU = "<C-u>",
        scrollD = "<C-d>",
        jumpTop = "[",
        jumpBot = "]",
      },
    },
  },
  init = function()
    vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep: ,foldclose:]]
    vim.o.foldcolumn = "1" -- '0' is not bad
    vim.o.foldlevel = 99 -- Using ufo provider need a large value, feel free to decrease the value
    vim.o.foldlevelstart = 99
    vim.o.foldenable = true
  end,
  config = function(_, opts)
    local handler = function(virtText, lnum, endLnum, width, truncate)
      local newVirtText = {}
      local totalLines = vim.api.nvim_buf_line_count(0)
      local foldedLines = endLnum - lnum
      local suffix = ("  %d %d%%"):format(foldedLines, foldedLines / totalLines * 100)
      local sufWidth = vim.fn.strdisplaywidth(suffix)
      local targetWidth = width - sufWidth
      local curWidth = 0
      for _, chunk in ipairs(virtText) do
        local chunkText = chunk[1]
        local chunkWidth = vim.fn.strdisplaywidth(chunkText)
        if targetWidth > curWidth + chunkWidth then
          table.insert(newVirtText, chunk)
        else
          chunkText = truncate(chunkText, targetWidth - curWidth)
          local hlGroup = chunk[2]
          table.insert(newVirtText, { chunkText, hlGroup })
          chunkWidth = vim.fn.strdisplaywidth(chunkText)
          -- str width returned from truncate() may less than 2nd argument, need padding
          if curWidth + chunkWidth < targetWidth then
            suffix = suffix .. (" "):rep(targetWidth - curWidth - chunkWidth)
          end
          break
        end
        curWidth = curWidth + chunkWidth
      end
      local rAlignAppndx =
        math.max(math.min(vim.opt.textwidth["_value"], width - 1) - curWidth - sufWidth, 0)
      suffix = (" "):rep(rAlignAppndx) .. suffix
      table.insert(newVirtText, { suffix, "MoreMsg" })
      return newVirtText
    end
    opts["fold_virt_text_handler"] = handler
    require("ufo").setup(opts)
    vim.keymap.set("n", "zR", require("ufo").openAllFolds)
    vim.keymap.set("n", "zM", require("ufo").closeAllFolds)
    vim.keymap.set("n", "zr", require("ufo").openFoldsExceptKinds)
    vim.keymap.set("n", "K", function()
      local winid = require("ufo").peekFoldedLinesUnderCursor()
      if not winid then
        -- vim.lsp.buf.hover()
        vim.cmd [[ Lspsaga hover_doc ]]
      end
    end)
  end,
}

Examples:

[sudoCompetence]

@awerebea thats just amazing.

However the arrow and percentage for me appear where the code ends not and the end of the window like yours. How did you modify the 'hidden' data to be at the end of the window?

[awerebea]

Hey @sudoCompetence! Glad you like it.

How did you modify... ?

Well, I just took the example from Customize fold text and modified it to take into account the textwidth property, so in my implementation, the position actually depends on texdtwidth but not on colorcolumn, sorry for the confusion.

This is the diff of the changes made:

[MariaSolOs]

Idk if it's just me, but on nightly I had to change my statuscol config to include disable_ft = { 'trouble' }, else Neovim crashes with a 134 exit code. Curious to know if anyone else experienced something similar.