refactor(tabline): Changed how tabline is created

Author: OXY2DEV

lua/bars/tabline.lua

@@ -0,0 +1,164 @@
+local tabline = {}
+local utils = require("bars.utils");
+local components = require("bars.components.tabline");
+
+---@class tabline.config
+tabline.config = {
+	---|fS
+
+	default = {
+		parts = {
+			{
+				kind = "tabs",
+
+				active = {
+					padding_left = "  ",
+					padding_right = "  ",
+				},
+				inactive = {
+					padding_left = "  ",
+					padding_right = "  ",
+				}
+			}
+		}
+	}
+
+	---|fE
+};
+
+---@type tabline.state
+tabline.state = {
+	enable = true,
+	attached = false
+};
+
+--- Updates the configuration ID for the tabline.
+---@return string | nil
+tabline.update_id = function ()
+	---|fS
+
+	local keys = vim.tbl_keys(tabline.config);
+	local ignore = { "default" };
+	table.sort(keys);
+
+	for _, key in ipairs(keys) do
+		if vim.list_contains(ignore, key) then
+			goto continue;
+		elseif type(tabline.config[key]) ~= "table" then
+			goto continue;
+		end
+
+		local tmp = tabline.config[key];
+
+		if tmp.condition == true then
+			return key;
+		elseif pcall(tmp.condition --[[ @as function ]]) and tmp.condition() == true  then
+			return key;
+		end
+
+		::continue::
+	end
+
+	return "default";
+
+	---|fE
+end
+
+--- Renders the tabline.
+---@return string
+tabline.render = function ()
+	---|fS
+
+	if tabline.state.attached ~= true then
+		return "";
+	end
+
+	local tlID = vim.g.__tlID;
+
+	if not tlID then
+		return "";
+	end
+
+	local config = tabline.config[tlID];
+
+	if type(config) ~= "table" then
+		return "";
+	end
+
+	local _o = "%#Normal#";
+
+	for _, part in ipairs(config.parts or {}) do
+		_o = _o .. components.get(part.kind, part, _o);
+	end
+
+	return _o;
+
+	---|fE
+end
+
+tabline.detach = function ()
+	---|fS
+
+	tabline.state.attached = false;
+	vim.o.tabline = vim.o.__tabline and vim.o.__tabline[1] or "";
+
+	vim.g.__tlID = nil;
+	vim.g.__tabline = nil;
+
+	---|fE
+end
+
+--- Attaches the tabline module.
+tabline.attach = function ()
+	---|fS
+
+	if tabline.config.condition then
+		local checked_condition, result = pcall(tabline.config.condition);
+
+		if checked_condition == false then
+			tabline.detach();
+			return;
+		elseif result == false then
+			tabline.detach();
+			return;
+		end
+	end
+
+	local tlID = tabline.update_id();
+	tabline.state.attached = true;
+
+	vim.g.__tlID = tlID;
+	vim.g.__tabline = utils.to_constant(vim.o.tabline);
+
+	vim.o.tabline = "%!v:lua.require('bars.tabline').render()";
+
+	---|fE
+end
+
+--- Cleans up invalid buffers and recalculates
+--- valid buffers config ID.
+tabline.clean = function ()
+	if tabline.config.condition then
+		local checked_condition, result = pcall(tabline.config.condition);
+
+		if checked_condition == false then
+			tabline.detach();
+			return;
+		elseif result == false then
+			tabline.detach();
+			return;
+		end
+	end
+end
+
+--- Sets up the tabline module.
+---@param config tabline.config | nil
+tabline.setup = function (config)
+	if type(config) == "table" then
+		tabline.config = vim.tbl_extend("force", tabline.config, config);
+	end
+
+	vim.g.__tlID = tabline.update_id();
+end
+
+return tabline;