Implemented folding and some improvements. Moved functions to the utils module

lua/config/autocmds.lua

@@ -1,9 +1,8 @@
 -- Save the last file on exit
 vim.api.nvim_create_autocmd("VimLeave", {
 	callback = function()
-		-- Save the last file path to a file
 		local last_file = vim.fn.expand('%:p') -- Get the absolute path of the current file
-		if last_file ~= "" then
+		if last_file ~= "" then          -- The operator means not equal in lua
 			local file = io.open(vim.fn.stdpath('data') .. "/lastfile.txt", "w")
 			if file then
 				file:write(last_file)
@@ -12,3 +11,18 @@ vim.api.nvim_create_autocmd("VimLeave", {
 		end
 	end,
 })
+
+vim.api.nvim_create_augroup("RememberFolds", {
+	clear = true
+})
+vim.api.nvim_create_autocmd({"BufWinLeave"}, {
+  group = "RememberFolds",
+  pattern = "*",
+  command = "silent! mkview",
+})
+vim.api.nvim_create_autocmd({"BufWinEnter"}, {
+  group = "RememberFolds",
+  pattern = "*",
+  command = "silent! loadview",
+})
+

lua/config/keymaps.lua

@@ -33,6 +33,20 @@ vim.keymap.set('n', '<leader>ya', 'ggVG"+y<C-o>')
 vim.keymap.set('n', '<leader>ss', ':wa<CR>')
 vim.keymap.set("n", "<leader>nn", ":e ~/synced/brainstore/zettelkasten/quick<CR>", { silent = true })
 
+-- Folding
+local opts = { noremap = true, silent = true }
+local is_all_folded = false
+local function toggle_fold()
+	if is_all_folded then
+		vim.opt.foldlevel = 99
+	else
+		vim.opt.foldlevel = 0
+	end
+	is_all_folded = not is_all_folded
+end
+vim.api.nvim_set_keymap("n", "<leader>ft", "za", opts)      -- toggle fold under cursor
+vim.keymap.set("n", "<leader>fs", toggle_fold, opts)  -- close all folds
+
 -- Quickly open some buffers
 vim.keymap.set('n', '<leader>occ', ':e ~/.config/nvim/init.lua<CR>`.zz')
 vim.keymap.set('n', '<leader>oct', ':e ~/synced/vault/contacts/contacts.txt<CR>`.zz')

lua/config/options.lua

@@ -16,3 +16,13 @@ vim.g.loaded_netrw = 1
 vim.g.loaded_netrwPlugin = 1
 
 vim.opt.signcolumn = "yes"
+
+-- Enable Treesitter-based folding
+vim.opt.foldmethod = "expr"
+vim.opt.foldexpr = "nvim_treesitter#foldexpr()"
+vim.opt.foldlevelstart = 99 -- open all folds by default
+vim.opt.fillchars = "fold:╌"
+
+-- 3. Persist folds using mkview/loadview
+
+