Updated 7. Example Custom Plugins (markdown)

7.-Example-Custom-Plugins.md

@@ -2539,35 +2539,116 @@ return {
 			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" },
+					-- },
+					setopt = true,
 					relculright = true,
 					segments = {
-						{ text = { builtin.foldfunc }, click = "v:lua.ScFa" },
 						{ text = { "%s" }, click = "v:lua.ScSa" },
+						{
+							-- text = { builtin.foldfunc, " " },
+							text = { builtin.foldfunc },
+							condition = { builtin.not_empty, true, builtin.not_empty },
+							click = "v:lua.ScFa",
+						},
 						{ text = { builtin.lnumfunc, " " }, click = "v:lua.ScLa" },
+						-- { text = { builtin.lnumfunc }, click = "v:lua.ScLa" },
 					},
 				})
 			end,
 		},
 	},
-	event = "BufReadPost",
+	lazy = true,
+	-- event = "BufReadPost",
+	event = { "BufReadPost", "BufRead", "InsertEnter", "BufNewFile" },
 	config = function()
 		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:]]
-
+		-- vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep: ,foldclose:]]
+		-- vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep: ,foldclose:]]
+		-- vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep:│,foldclose:]]
+		-- vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep:│,foldclose:]]
+		-- vim.o.fillchars = [[eob: ,fold: ,foldopen:󰛲,foldsep:│,foldclose:󰜄]]
+		-- vim.o.fillchars = [[eob: ,fold: ,foldopen:,foldsep:│,foldclose:]]
+		vim.o.fillchars = [[eob: ,fold: ,foldopen:▾,foldsep:│,foldclose:▸]]
+		-- vim.opt.fillchars = {
+		-- 	vert = "▕", -- alternatives │
+		-- 	fold = " ",
+		-- 	eob = " ", -- suppress ~ at EndOfBuffer
+		-- 	diff = "╱", -- alternatives = ⣿ ░ ─
+		-- 	msgsep = "‾",
+		-- 	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)
 		vim.cmd("highlight FoldColumn guifg=" .. vim.fn.synIDattr(vim.fn.synIDtrans(vim.fn.hlID("Comment")), "fg"))
+		-- vim.cmd("highlight FoldColumn guifg=" .. vim.fn.synIDattr(vim.fn.synIDtrans(vim.fn.hlID("IblIndent")), "fg"))
 		-- 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)
+			-- provider_selector = function(bufnr, filetype, buftype)
+			-- 	return { "treesitter", "indent" }
+			-- end,
+			open_fold_hl_timeout = 150,
+
+			preview = {
+				win_config = {
+					border = { "", "─", "", "", "", "─", "", "" },
+					-- winhighlight = 'Normal:Normal',
+					-- winhighlight = 'IncSearch:Folded',
+					winhighlight = "Normal:UfoPreviewNormal,FloatBorder:UfoPreviewBorder,CursorLine:UfoPreviewCursorLine",
+					winblend = 0,
+				},
+				mappings = {
+					scrollU = "<C-u>",
+					scrollD = "<C-d>",
+					jumpTop = "[",
+					jumpBot = "]",
+				},
+			},
+			provider_selector = function(_, filetype)
 				return { "treesitter", "indent" }
 			end,
+			fold_virt_text_handler = function(virt_text, lnum, end_lnum, width, truncate)
+				local result = {}
+				local _end = end_lnum - 1
+				local final_text = vim.trim(vim.api.nvim_buf_get_text(0, _end, 0, _end, -1, {})[1])
+				local suffix = final_text:format(end_lnum - lnum)
+				local suffix_width = vim.fn.strdisplaywidth(suffix)
+				local target_width = width - suffix_width
+				local cur_width = 0
+				for _, chunk in ipairs(virt_text) do
+					local chunk_text = chunk[1]
+					local chunk_width = vim.fn.strdisplaywidth(chunk_text)
+					if target_width > cur_width + chunk_width then
+						table.insert(result, chunk)
+					else
+						chunk_text = truncate(chunk_text, target_width - cur_width)
+						local hl_group = chunk[2]
+						table.insert(result, { chunk_text, hl_group })
+						chunk_width = vim.fn.strdisplaywidth(chunk_text)
+						-- str width returned from truncate() may less than 2nd argument, need padding
+						if cur_width + chunk_width < target_width then
+							suffix = suffix .. (" "):rep(target_width - cur_width - chunk_width)
+						end
+						break
+					end
+					cur_width = cur_width + chunk_width
+				end
+				table.insert(result, { " ⋯ ", "NonText" })
+				table.insert(result, { suffix, "TSPunctBracket" })
+				return result
+			end,
 		})
 	end,
 }