feat(nvim): add nvim-ufo for better fold handling

nvim/lazy-lock.json

@@ -77,6 +77,7 @@
   "nvim-treesitter-textobjects": { "branch": "master", "commit": "e69a504baf2951d52e1f1fbb05145d43f236cbf1" },
   "nvim-ts-autotag": { "branch": "main", "commit": "6be1192965df35f94b8ea6d323354f7dc7a557e4" },
   "nvim-ts-context-commentstring": { "branch": "main", "commit": "92e688f013c69f90c9bbd596019ec10235bc51de" },
+  "nvim-ufo": { "branch": "main", "commit": "ebbab711d909d5f675e38ad489765bd22bd2c6b3" },
   "nvim-various-textobjs": { "branch": "main", "commit": "df5934fc2c57b1d8450bfcba067a2516d1221a06" },
   "nvim-web-devicons": { "branch": "master", "commit": "5de460ca7595806044eced31e3c36c159a493857" },
   "obsidian.nvim": { "branch": "main", "commit": "1149c5bba00ae93752b008dfebad51cc7a0f62db" },
@@ -86,6 +87,7 @@
   "plenary.nvim": { "branch": "master", "commit": "50012918b2fc8357b87cff2a7f7f0446e47da174" },
   "popup.nvim": { "branch": "master", "commit": "b7404d35d5d3548a82149238289fa71f7f6de4ac" },
   "project.nvim": { "branch": "main", "commit": "8c6bad7d22eef1b71144b401c9f74ed01526a4fb" },
+  "promise-async": { "branch": "main", "commit": "e94f35161b8c5d4a4ca3b6ff93dd073eb9214c0e" },
   "rainbow_csv": { "branch": "master", "commit": "6955d13a65e0161e8dad488b6045441d527d62ec" },
   "smart-splits.nvim": { "branch": "master", "commit": "c8a9173d70cbbd1f6e4a414e49e31df2b32a1362" },
   "sqlite.lua": { "branch": "master", "commit": "b7e28c8463254c46a8e61c52d27d6a2040492fc3" },

nvim/lua/config/keymaps.lua

@@ -27,6 +27,9 @@ vim.keymap.set("n", "gy", "`[v`]y", { desc = "Visually select of just pasted con
 -- stylua: ignore
 vim.keymap.set("n", "<leader>wi", ":silent !open -a iA\\ Writer.app '%:p'<CR>", { desc = "Open in iA Writer", noremap = true, silent = true })
 
+vim.keymap.set("n", "-", "<CMD>foldclose<CR>", { desc = "Close code fold" })
+vim.keymap.set("n", "+", "<CMD>foldopen<CR>", { desc = "Open code fold" })
+
 vim.keymap.set("n", "<C-h>", function()
   require("smart-splits").move_cursor_left()
 end)

nvim/lua/plugins/ufo.lua

@@ -0,0 +1,44 @@
+-- Not UFO in the sky, but an ultra fold in Neovim.
+-- https://github.com/kevinhwang91/nvim-ufo
+return {
+  "kevinhwang91/nvim-ufo",
+  dependencies = "kevinhwang91/promise-async",
+  config = function()
+    vim.o.foldcolumn = "1"
+    vim.o.foldlevel = 99
+    vim.o.foldlevelstart = 99
+    vim.o.foldenable = true
+
+    require("ufo").setup({
+      provider_selector = function(bufnr, filetype, bufftype)
+        return { "lsp", "indent" }
+      end,
+    })
+  end,
+  keys = {
+    {
+      "zR",
+      function()
+        require("ufo").openAllFolds()
+      end,
+      desc = "Open all folds",
+    },
+    {
+      "zM",
+      function()
+        require("ufo").closeAllFolds()
+      end,
+      desc = "Close all folds",
+    },
+    {
+      "zK",
+      function()
+        local winid = require("ufo").peekFoldedLinesUnderCursor()
+        if not winid then
+          vim.lsp.buf.hover()
+        end
+      end,
+      desc = "Peek fold",
+    },
+  },
+}