dotfiles/vim/lua/lightline_config.lua

require("nvim-web-devicons").setup({})

local mode_map = {
	NORMAL = "N",
	INSERT = "I",
	REPLACE = "R",
	COMMAND = "C",
	VISUAL = "v",
	["V-BLOCK"] = "V",
	["V-LINE"] = "V-LINE",
}

local function format_diff_element(val, sym)
	if val == nil or val < 1 then
		return ""
	end

	return sym .. val
end

local diagnostics = {
	"diagnostics",
	sources = { "nvim_lsp" },
	diagnostics_color = {
		error = { fg = "#ffffff", bg = "#bf616a" },
		warn = { fg = "#ebcb8b" },
		info = { fg = "#81a1c1" },
		hint = { fg = "#a3be8c" },
	},
	always_visible = false,
	separator = { left = "   " },
	symbols = {
		error = function(count)
			return count .. "E"
		end,
		warn = function(count)
			return count .. "W"
		end,
		info = function(count)
			return count .. "I"
		end,
		hint = function(count)
			return count .. "H"
		end,
	},
}

require("lualine").setup({
	options = {
		icons_enabled = false,
		theme = "gruxbox_dark",
		component_separators = "",
		section_separators = { left = "", right = "" },
	},
	sections = {
		lualine_a = {
			{
				"mode",
				fmt = function(mode)
					return mode_map[mode] or mode
				end,
			},
			"paste",
		},
		lualine_b = { "filename" },
		lualine_c = {
			{
				"branch",
				padding = 1,
			},
			-- render coloured output from gitsigns, this doesn't seem to work with b:gitsigns_status:
			{
				function()
					return format_diff_element(vim.b.gitsigns_status_dict.added, "+")
				end,
				color = { fg = "#a3be8c" },
			},
			{
				function()
					return format_diff_element(vim.b.gitsigns_status_dict.changed, "~")
				end,
				color = { fg = "#ebcb8b" },
			},
			{
				function()
					return format_diff_element(vim.b.gitsigns_status_dict.removed, "-")
				end,
				color = { fg = "#bf616a" },
			},
			diagnostics,
		},
		lualine_x = {
			{
				function()
					return vim.bo.filetype
				end,
				padding = { left = 1, right = 0 },
			},
		},
		lualine_y = { { "progress", padding = { left = 1, right = 1 } } },
		lualine_z = { { "location", padding = { left = 1, right = 1 } } },
	},
	inactive_sections = {
		lualine_a = {},
		lualine_b = {},
		lualine_c = { "filename", diagnostics },
		lualine_x = { { "location", padding = { right = 0 } } },
		lualine_y = {},
		lualine_z = {},
	},
})