Add empty directory icons

lua/lib/config.lua

@@ -16,6 +16,8 @@ function M.get_icon_state()
     folder_icons = {
       default = "",
       open = "",
+      empty = "",
+      empty_open = "",
       symlink = "",
     }
   }

lua/lib/populate.lua

@@ -15,6 +15,9 @@ local path_to_matching_str = require'lib.utils'.path_to_matching_str
 local function dir_new(cwd, name)
   local absolute_path = cwd..'/'..name
   local stat = luv.fs_stat(absolute_path)
+  local handle = luv.fs_opendir(absolute_path, nil, 1)
+  local children = luv.fs_readdir(handle)
+  luv.fs_closedir(handle)
   return {
     name = name,
     absolute_path = absolute_path,
@@ -23,6 +26,7 @@ local function dir_new(cwd, name)
     match_name = path_to_matching_str(name),
     match_path = path_to_matching_str(absolute_path),
     open = false,
+    empty = children == nil,
     entries = {}
   }
 end

lua/lib/renderer.lua

@@ -16,14 +16,22 @@ local set_folder_hl = function(line, depth, git_icon_len, _, hl_group)
 end
 
 if icon_state.show_folder_icon then
-  get_folder_icon = function(open, is_symlink)
+  get_folder_icon = function(open, is_symlink, is_empty)
     local n = ""
     if is_symlink then
       n = icon_state.icons.folder_icons.symlink
     elseif open then
-      n = icon_state.icons.folder_icons.open
+      if is_empty then
+        n = icon_state.icons.folder_icons.empty_open
+      else
+        n = icon_state.icons.folder_icons.open
+      end
     else
-      n = icon_state.icons.folder_icons.default
+      if is_empty then
+        n = icon_state.icons.folder_icons.empty
+      else
+        n = icon_state.icons.folder_icons.default
+      end
     end
     return n.." "
   end
@@ -230,7 +238,7 @@ local function update_draw_data(tree, depth, markers)
     local git_hl = get_git_hl(node)
 
     if node.entries then
-      local icon = get_folder_icon(node.open, node.link_to ~= nil)
+      local icon = get_folder_icon(node.open, node.link_to ~= nil, node.empty)
       local git_icon = get_git_icons(node, index, offset, #icon+1) or ""
       -- INFO: this is mandatory in order to keep gui attributes (bold/italics)
       set_folder_hl(index, offset, #icon, #node.name+#git_icon, 'NvimTreeFolderName')