feat: add automatic indentation insertion based on previous line

lua/utils/indentor.lua

@@ -0,0 +1,60 @@
+local M = {}
+
+local function get_previous_line_indentation()
+  -- Get the current cursor position
+  local current_line, _ = unpack(vim.api.nvim_win_get_cursor(0))
+
+  -- Ensure we're not on the first line
+  if current_line == 1 then
+    return 0
+  end
+
+  -- Get the previous line's content
+  local previous_line =
+    vim.api.nvim_buf_get_lines(0, current_line - 2, current_line - 1, false)[1]
+
+  -- Match the leading spaces (indentation)
+  local indentation = previous_line:match("^%s*")
+
+  -- Return the number of spaces (or indentation level)
+  return #indentation
+end
+
+function M.insert_previous_line_indentation()
+  -- Get the cursor column position
+  local _, col = unpack(vim.api.nvim_win_get_cursor(0))
+
+  -- If the cursor is at the start of the line (column 0)
+  if col == 0 then
+    -- Get the number of spaces from the previous line's indentation
+    local indentation_level = get_previous_line_indentation()
+
+    -- Insert the same number of spaces at the start of the current line
+    vim.api.nvim_put({ string.rep(" ", indentation_level) }, "c", true, true)
+  else
+    -- Insert a tab (or spaces if 'expandtab' is set)
+    vim.api.nvim_feedkeys(
+      vim.api.nvim_replace_termcodes("<Tab>", true, false, true),
+      "n",
+      true
+    )
+  end
+end
+
+-- Create a keymap to trigger the function using native mappings
+-- vim.api.nvim_set_keymap(
+--   { "i", "n" },
+--   "<C-i>",
+--   "<Cmd>lua require('indentor').insert_previous_line_indentation()<CR>",
+--   { noremap = true, silent = true }
+-- )
+
+-- Create a keymap to trigger the function using Rootiest utils
+require("data").func.add_keymap(
+  "<C-i>",
+  M.insert_previous_line_indentation,
+  "Indent Line",
+  { "i", "n" }
+)
+
+return M