nvim config stolen from @Lukacms

nvim/lua/utils.lua

@@ -0,0 +1,85 @@
+local default_options = {
+	noremap = true,
+	silent = true,
+}
+
+return {
+	map = function(mode, keys, action, opts)
+		local options = default_options
+		if opts then
+			options = vim.tbl_extend("force", options, opts)
+		end
+
+		vim.keymap.set(mode, keys, action, options)
+	end,
+	buf_map = function(buffer, mode, keys, action, opts)
+		local options = default_options
+
+		options.buffer = buffer
+		if opts then
+			options = vim.tbl_extend("force", options, opts)
+		end
+
+		vim.keymap.set(mode, keys, action, options)
+	end,
+
+	buf_command = function(bufnr, name, fn, opts)
+		vim.api.nvim_buf_create_user_command(bufnr, name, fn, opts or {})
+	end,
+
+	highlight = function(group, color)
+		local command = "hi " .. group .. " "
+		if color.style then
+			command = command .. " gui=" .. color.style
+		end
+		if color.fg then
+			command = command .. " guifg=" .. color.fg
+		end
+		if color.bg then
+			command = command .. " guibg=" .. color.bg
+		end
+		if color.sp then
+			command = command .. " guisp=" .. color.sp
+		end
+
+		vim.cmd(command)
+	end,
+
+	fold_handler = function(virt_text, fold_start_line, fold_end_line, width, truncate)
+		local new_virt_text = {}
+		local suffix = ("  %d "):format(fold_end_line - fold_start_line)
+		local suf_width = vim.fn.strdisplaywidth(suffix)
+		local target_width = width - suf_width
+		local cur_width = 0
+
+		local fold_hl_group = nil
+
+		for _, chunk in ipairs(virt_text) do
+			local chunk_text = chunk[1]
+			local chunk_width = vim.fn.strdisplaywidth(chunk_text)
+
+			fold_hl_group = chunk[2] -- Not 100% guarantee to have the good hl group if
+			-- there is something after the fold character but most likely to.
+
+			if target_width > cur_width + chunk_width then
+				table.insert(new_virt_text, chunk)
+			else
+				chunk_text = truncate(chunk_text, target_width - cur_width)
+				local hl_group = chunk[2]
+
+				table.insert(new_virt_text, { 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(new_virt_text, { suffix, "MoreMsg" })
+		table.insert(new_virt_text, { vim.fn.trim(vim.fn.getline(fold_end_line)), fold_hl_group })
+
+		return new_virt_text
+	end,
+}