[neovim] Add ufo/statuscol

.config/nvim/lua/core/options.lua

@@ -36,7 +36,6 @@ vim.opt.wrap = false -- display lines as one long line
 vim.opt.scrolloff = 8
 vim.opt.sidescrolloff = 8
 vim.opt.guifont = "monospace:h10" -- the font used in graphical neovim applications
-vim.opt.fillchars.eob = " "
 vim.opt.shortmess:append("c")
 vim.opt.whichwrap:append("<,>,[,],h,l")
 vim.opt.iskeyword:append("-")
@@ -44,5 +43,11 @@ vim.opt.formatoptions:remove({ "c", "r", "o" })
 vim.opt.linebreak = true
 vim.opt.numberwidth = 1
 
+vim.opt.foldenable = true
+vim.opt.foldlevel = 99
+vim.opt.foldlevelstart = 99
+vim.opt.foldcolumn = "1"
+vim.opt.fillchars = [[eob: ,fold: ,foldopen:,foldsep: ,foldclose:,diff: ]]
+
 -- experimental
 vim.opt.cmdheight = 0 -- Number of screen lines to use for the command-line

.config/nvim/lua/core/plugins.lua

@@ -173,4 +173,31 @@ require("lazy").setup({
 		end,
 		ft = { "markdown" },
 	},
+
+	-- 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,
+			},
+		},
+	},
 }, lazy_opts)

.config/nvim/lua/plugins/diffview.lua

@@ -6,4 +6,4 @@ require("diffview").setup({
 	},
 })
 
-vim.opt.fillchars = "diff: "
+-- vim.opt.fillchars = "diff: "

.config/nvim/lua/plugins/init.lua

@@ -21,3 +21,4 @@ require("plugins.markdowntoc")
 require("plugins.projections")
 require("plugins.diffview")
 require("plugins.align")
+require("plugins.ufo")

.config/nvim/lua/plugins/ufo.lua

@@ -0,0 +1,13 @@
+require("ufo").setup({
+	provider_selector = function(bufnr, filetype, buftype)
+		return { "treesitter", "indent" }
+	end,
+})
+
+local keymap = vim.keymap.set
+-- Code Folding
+-- keymap("n", "zR", require("ufo").openAllFolds, { desc = "Open all folds" })
+-- keymap("n", "zM", require("ufo").closeAllFolds, { desc = "Close all folds" })
+keymap("n", "zr", require("ufo").openFoldsExceptKinds, { desc = "Fold less" })
+keymap("n", "zm", require("ufo").closeFoldsWith, { desc = "Fold more" })
+keymap("n", "zp", require("ufo").peekFoldedLinesUnderCursor, { desc = "Peek fold" })