refactor: replace feedkeys with direct buffer operations for tab indentation

lua/todoer/init.lua

@@ -70,6 +70,13 @@ local function get_line_details(lnum)
 end
 
 
+-- Helper: Creates proper indent string based on buffer settings
+local function get_indent_string()
+    local sw = vim.bo.shiftwidth
+    local et = vim.bo.expandtab
+    return et and string.rep(" ", sw) or "\t"
+end
+
 -- Helper: Gets details for the current line including cursor position
 local function get_current_line_details_with_cursor()
     local cursor_pos = vim.api.nvim_win_get_cursor(0)
@@ -266,34 +273,45 @@ local function setup_buffer_keymaps()
         end
 	end
 
-	-- indent line if tab is pressed when line is a todo (Will be refactored in Step 4)
+    -- Handle tab indentation for TODO lines
     local function press_tab()
-		local current_line = vim.api.nvim_get_current_line()
+        local details = get_line_details(vim.api.nvim_win_get_cursor(0)[1])
-		-- Updated pattern to match -, *, + markers
+        if not details or not details.is_todo then
-		local pattern = "^%s*[%-%*%+]%s+%[[ x]%]"
-		if string.match(current_line, pattern) then
-			-- Still using feedkeys for now, will be refactored later
-			vim.api.nvim_feedkeys(vim.api.nvim_replace_termcodes("<C-t>", true, false, true), "i", false)
-            return "" -- Action handled by feedkeys
-		else
-            -- Return <Tab> to allow default behavior
             return vim.api.nvim_replace_termcodes("<Tab>", true, false, true)
         end
+
+        local indent_str = get_indent_string()
+        local new_line = details.indent .. indent_str .. 
+                       (details.marker or "-") .. " [ ] " .. details.content
+        vim.api.nvim_set_current_line(new_line)
+        
+        -- Calculate new cursor column (preserve relative position)
+        local cursor_col = vim.api.nvim_win_get_cursor(0)[2]
+        local new_col = cursor_col + #indent_str
+        vim.api.nvim_win_set_cursor(0, {vim.api.nvim_win_get_cursor(0)[1], new_col})
+        
+        return "" -- Prevent default behavior
     end
 
-	-- indent line if shift tab is pressed when line is a todo (Will be refactored in Step 4)
+    -- Handle shift-tab outdentation for TODO lines
     local function press_shift_tab()
-		local current_line = vim.api.nvim_get_current_line()
+        local details = get_line_details(vim.api.nvim_win_get_cursor(0)[1])
-		-- Updated pattern to match -, *, + markers
+        if not details or not details.is_todo or #details.indent == 0 then
-		local pattern = "^%s*[%-%*%+]%s+%[[ x]%]"
-		if string.match(current_line, pattern) then
-			-- Still using feedkeys for now, will be refactored later
-			vim.api.nvim_feedkeys(vim.api.nvim_replace_termcodes("<C-d>", true, false, true), "i", false)
-            return "" -- Action handled by feedkeys
-		else
-            -- Return <S-Tab> to allow default behavior
             return vim.api.nvim_replace_termcodes("<S-Tab>", true, false, true)
         end
+
+        local sw = vim.bo.shiftwidth
+        local new_indent = details.indent:sub(1, -sw - 1)
+        local new_line = new_indent .. 
+                       (details.marker or "-") .. " [ ] " .. details.content
+        vim.api.nvim_set_current_line(new_line)
+        
+        -- Calculate new cursor column (preserve relative position)
+        local cursor_col = vim.api.nvim_win_get_cursor(0)[2]
+        local new_col = math.max(0, cursor_col - sw)
+        vim.api.nvim_win_set_cursor(0, {vim.api.nvim_win_get_cursor(0)[1], new_col})
+        
+        return "" -- Prevent default behavior
     end
 
 	-- Toggles the checkbox [ ] <-> [x] for lines starting with -, *, +, or #
@@ -322,9 +340,9 @@ local function setup_buffer_keymaps()
 	vim.keymap.set("n", "<leader>t", function() end, { desc = "+TODOs", buffer = 0 }) -- Placeholder
     -- Keep <CR> mapping without expr = true
 	vim.keymap.set("i", "<CR>", press_enter, { desc = "Todoer: Handle Enter", buffer = 0 })
-    -- Keep expr = true for Tab/S-Tab for now, until they are refactored
+    -- Tab handling for TODO items
-	vim.keymap.set("i", "<TAB>", press_tab, { desc = "Todoer: Handle Tab", expr = true, buffer = 0 })
+	vim.keymap.set("i", "<TAB>", press_tab, { desc = "Todoer: Handle Tab", buffer = 0 })
-	vim.keymap.set("i", "<S-Tab>", press_shift_tab, { desc = "Todoer: Handle Shift-Tab", expr = true, buffer = 0 })
+	vim.keymap.set("i", "<S-Tab>", press_shift_tab, { desc = "Todoer: Handle Shift-Tab", buffer = 0 })
 	vim.keymap.set("n", "<leader>tt", toggle_todo, { desc = "Todoer: Toggle TODO", buffer = 0 })
 	-- New mappings for adding TODOs
 	vim.keymap.set("n", "<leader>ti", add_todo_insert_mode, { desc = "Todoer: Add TODO (cursor after marker)", buffer = 0, silent = true })