feat: use autocommands for filetype-specific setup

lua/todoer/init.lua

@@ -1,6 +1,13 @@
 -- Create the module table
 local M = {}
 
+-- Default configuration
+local defaults = {
+	filetypes = { "markdown", "text", "norg" }, -- Filetypes to activate the plugin for
+}
+
+-- Internal function to set up buffer-local keymaps
+local function setup_buffer_keymaps()
 	-- add new todo line when previous is already a todo
 	local function press_enter()
 		local current_line = vim.api.nvim_get_current_line()
@@ -118,23 +125,41 @@ local function remove_todo()
 		end
 	end
 
--- Setup function
--- This function will be called by the user to configure and activate the plugin
--- For now, it just sets up the default keymaps
+	-- Set up buffer-local keymaps
+	-- Use buffer = 0 to target the current buffer
+	local map_opts = { noremap = true, silent = true, buffer = 0 }
+	local expr_map_opts = { noremap = true, expr = true, silent = true, buffer = 0 }
+
+	vim.keymap.set("n", "<leader>t", function() end, { desc = "+TODOs", buffer = 0 }) -- Placeholder, keep silent=false if needed
+	vim.keymap.set("i", "<CR>", press_enter, { desc = "Todoer: Handle Enter", expr = true, buffer = 0 }) -- Keep expr=true, noremap=true is default
+	vim.keymap.set("i", "<TAB>", press_tab, { desc = "Todoer: Handle Tab", expr = true, buffer = 0 }) -- Keep expr=true
+	vim.keymap.set("i", "<S-Tab>", press_shift_tab, { desc = "Todoer: Handle Shift-Tab", expr = true, buffer = 0 }) -- Keep expr=true
+	vim.keymap.set("n", "<leader>tt", toggle_todo, { desc = "Todoer: Toggle TODO", buffer = 0 })
+	vim.keymap.set("n", "<leader>ta", add_todo, { desc = "Todoer: Add TODO", buffer = 0 })
+	vim.keymap.set("n", "<leader>td", remove_todo, { desc = "Todoer: Remove TODO", buffer = 0 })
+
+	-- Optional: Notify that keymaps are set for this buffer
+	-- vim.notify("Todoer keymaps activated for this buffer", vim.log.levels.INFO)
+end
+
+-- Setup function: Called by the user in their config
 function M.setup(opts)
-	-- opts is a placeholder for future configuration options
-	opts = opts or {}
-
-	-- Set up the keymaps
-	vim.keymap.set("n", "<leader>t", function() end, { desc = "+TODOs" })
-	vim.keymap.set("i", "<CR>", press_enter, { desc = "On enter", noremap = true, expr = true })
-	vim.keymap.set("i", "<TAB>", press_tab, { desc = "On tab", noremap = true, expr = true })
-	vim.keymap.set("i", "S-Tab", press_shift_tab, { desc = "On shift tab", noremap = true, expr = true })
-	vim.keymap.set("n", "<leader>tt", toggle_todo, { desc = "Toggle TODO" })
-	vim.keymap.set("n", "<leader>ta", add_todo, { desc = "Add TODO" })
-	vim.keymap.set("n", "<leader>td", remove_todo, { desc = "Remove TODO" })
-
-	print("Todoer setup complete!") -- Added a print statement for confirmation
+	-- Merge user options with defaults
+	local config = vim.tbl_deep_extend("force", {}, defaults, opts or {})
+
+	-- Create an autocommand group to ensure we can clear it later if needed
+	local group = vim.api.nvim_create_augroup("TodoerUserSetup", { clear = true })
+
+	-- Create the autocommand
+	vim.api.nvim_create_autocmd("FileType", {
+		group = group,
+		pattern = config.filetypes, -- Use filetypes from config
+		desc = "Setup Todoer keymaps for specific filetypes",
+		callback = function()
+			-- Call the function that sets up buffer-local keymaps
+			setup_buffer_keymaps()
+		end,
+	})
 end
 
 -- Return the module table

plugin/todoer.lua

@@ -1,3 +1,8 @@
--- Load the main module and call its setup function.
--- This will execute the setup logic inside lua/todoer/init.lua immediately.
-require('todoer').setup()
+-- This file is intentionally left blank or can contain comments.
+-- The plugin is now activated by calling require('todoer').setup()
+-- in the user's Neovim configuration (e.g., init.lua or via a plugin manager).
+
+-- Example user configuration (e.g., in init.lua or using lazy.nvim):
+-- require('todoer').setup({
+--   filetypes = { 'markdown', 'txt' } -- Optional: override default filetypes
+-- })