new split windows repositioned to right/bottom for horizontal/vertical splits

lua/custom/plugins/filetree.lua

@@ -1,13 +1,13 @@
 -- Unless you are still migrating, remove the deprecated commands from v1.x
-vim.cmd([[ let g:neo_tree_remove_legacy_commands = 1 ]])
+vim.cmd [[ let g:neo_tree_remove_legacy_commands = 1 ]]
 
 return {
-  "nvim-neo-tree/neo-tree.nvim",
-  version = "*",
+  'nvim-neo-tree/neo-tree.nvim',
+  version = '*',
   dependencies = {
-    "nvim-lua/plenary.nvim",
-    "nvim-tree/nvim-web-devicons",
-    "MunifTanjim/nui.nvim",
+    'nvim-lua/plenary.nvim',
+    'nvim-tree/nvim-web-devicons',
+    'MunifTanjim/nui.nvim',
   },
   config = function()
     local function smart_open(state)
@@ -17,6 +17,13 @@ return {
       end
       local path = node:get_id()
 
+      -- If the node is a directory, just toggle expand/collapse
+      if node.type == 'directory' then
+        state.commands.toggle_node(state, node)
+        return
+      end
+
+      -- --- File handling starts here ---
       -- Reuse already open buffer in any tab safely
       for _, tab in ipairs(vim.api.nvim_list_tabpages()) do
         if vim.api.nvim_tabpage_is_valid(tab) then
@@ -30,10 +37,7 @@ return {
                 for _, w in ipairs(vim.api.nvim_list_wins()) do
                   if vim.api.nvim_win_is_valid(w) then
                     local b = vim.api.nvim_win_get_buf(w)
-                    if
-                        vim.api.nvim_buf_is_valid(b)
-                        and vim.api.nvim_buf_get_option(b, "filetype") == "neo-tree"
-                    then
+                    if vim.api.nvim_buf_is_valid(b) and vim.api.nvim_buf_get_option(b, 'filetype') == 'neo-tree' then
                       vim.api.nvim_win_close(w, true)
                     end
                   end
@@ -53,9 +57,9 @@ return {
           local buf = vim.api.nvim_win_get_buf(win)
           if vim.api.nvim_buf_is_valid(buf) then
             local bufname = vim.api.nvim_buf_get_name(buf)
-            local buftype = vim.api.nvim_buf_get_option(buf, "buftype")
-            local modified = vim.api.nvim_buf_get_option(buf, "modified")
-            if bufname == "" and buftype == "" and not modified then
+            local buftype = vim.api.nvim_buf_get_option(buf, 'buftype')
+            local modified = vim.api.nvim_buf_get_option(buf, 'modified')
+            if bufname == '' and buftype == '' and not modified then
               empty_buf = buf
               vim.api.nvim_set_current_win(win)
               break
@@ -65,43 +69,62 @@ return {
       end
 
       if empty_buf then
-        vim.cmd("edit " .. vim.fn.fnameescape(path))
+        vim.cmd('edit ' .. vim.fn.fnameescape(path))
       else
-        vim.cmd("tabnew " .. vim.fn.fnameescape(path))
+        vim.cmd('tabnew ' .. vim.fn.fnameescape(path))
       end
 
       -- Always close Neo-tree window if open
       for _, win in ipairs(vim.api.nvim_list_wins()) do
         if vim.api.nvim_win_is_valid(win) then
           local buf = vim.api.nvim_win_get_buf(win)
-          if
-              vim.api.nvim_buf_is_valid(buf)
-              and vim.api.nvim_buf_get_option(buf, "filetype") == "neo-tree"
-          then
+          if vim.api.nvim_buf_is_valid(buf) and vim.api.nvim_buf_get_option(buf, 'filetype') == 'neo-tree' then
             vim.api.nvim_win_close(win, true)
           end
         end
       end
     end
 
-    require("neo-tree").setup({
+    require('neo-tree').setup {
       close_if_last_window = true,
-      popup_border_style = "rounded",
+      popup_border_style = 'rounded',
       enable_git_status = true,
       enable_diagnostics = true,
       default_component_configs = {
         indent = { padding = 1, indent_size = 2 },
-        icon = { folder_closed = "", folder_open = "", folder_empty = "ﰊ" },
+        icon = { folder_closed = '', folder_open = '', folder_empty = 'ﰊ' },
       },
       window = {
-        position = "float",
+        position = 'float',
         width = 40,
         mapping_options = { noremap = true, nowait = true },
         mappings = {
-          ["<cr>"] = smart_open,
-          ["h"] = "open_vsplit",
-          ["v"] = "open_split",
-          ["t"] = "noop",
+          ['<cr>'] = smart_open,
+          ['v'] = function(state)
+            local node = state.tree:get_node()
+            if node.type == 'directory' then
+              state.commands.toggle_node(state, node)
+              return
+            end
+            local path = node:get_id()
+            state.commands.open_split(state) -- opens horizontal split (top)
+            vim.schedule(function()
+              vim.cmd 'wincmd J'             -- move the new split to bottom
+            end)
+          end,
+          ['h'] = function(state)
+            local node = state.tree:get_node()
+            if node.type == 'directory' then
+              state.commands.toggle_node(state, node)
+              return
+            end
+            local path = node:get_id()
+            state.commands.open_vsplit(state) -- opens vertical split (left)
+            vim.schedule(function()
+              vim.cmd 'wincmd L'              -- move the new split to right
+            end)
+          end,
+          ['t'] = 'noop',
         },
       },
       filesystem = {
@@ -109,13 +132,13 @@ return {
           enabled = true, -- updated to table format
         },
         use_libuv_file_watcher = true,
-        hijack_netrw_behavior = "open_default",
+        hijack_netrw_behavior = 'open_default',
         filtered_items = {
           visible = true,
           hide_dotfiles = false,
           hide_gitignored = true,
         },
       },
-    })
+    }
   end,
 }