refactor(#2886): multi instance: node group functions refactoring (#2959)

* move last_group_node to DirectoryNode

* move add BaseNode:as and more doc

* revert parameter name changes

* revert parameter name changes

* add Class

* move group methods into DN

* tidy group methods

* tidy group methods

* tidy group methods

* tidy group methods

* parent is DirectoryNode

* tidy expand all

* BaseNode -> Node

* move watcher to DirectoryNode

* last_group_node is DirectoryNode only

* simplify create-file

* simplify parent

* simplify collapse-all

* simplify live-filter

* style

lua/nvim-tree/actions/moves/item.lua

@@ -78,7 +78,7 @@ local function expand_node(node)
     ---@cast node DirectoryNode
     -- Expand the node.
     -- Should never collapse since we checked open.
-    node:expand_or_collapse()
+    node:expand_or_collapse(false)
   end
 end
 
@@ -102,7 +102,7 @@ local function move_next_recursive(what, skip_gitignored)
   end
   if node_init:is(DirectoryNode) and valid and not node_init.open then
     ---@cast node_init DirectoryNode
-    node_init:expand_or_collapse()
+    node_init:expand_or_collapse(false)
   end
 
   move("next", what, skip_gitignored)

lua/nvim-tree/actions/moves/parent.lua

@@ -1,6 +1,7 @@
 local view = require("nvim-tree.view")
 local utils = require("nvim-tree.utils")
-local core = require("nvim-tree.core")
+
+local DirectoryNode = require("nvim-tree.node.directory")
 
 local M = {}
 
@@ -9,33 +10,32 @@ local M = {}
 function M.fn(should_close)
   should_close = should_close or false
 
+  ---@param node Node
   return function(node)
-    local explorer = core.get_explorer()
-    node = node:last_group_node()
-    if should_close and node.open then
-      node.open = false
-      if explorer then
-        explorer.renderer:draw()
+    local dir = node:as(DirectoryNode)
+    if dir then
+      dir = dir:last_group_node()
+      if should_close and dir.open then
+        dir.open = false
+        dir.explorer.renderer:draw()
+        return
       end
-      return
     end
 
-    local parent = node:get_parent_of_group().parent
+    local parent = (node:get_parent_of_group() or node).parent
 
     if not parent or not parent.parent then
       return view.set_cursor({ 1, 0 })
     end
 
-    local _, line = utils.find_node(core.get_explorer().nodes, function(n)
+    local _, line = utils.find_node(parent.explorer.nodes, function(n)
       return n.absolute_path == parent.absolute_path
     end)
 
     view.set_cursor({ line + 1, 0 })
     if should_close then
       parent.open = false
-      if explorer then
-        explorer.renderer:draw()
-      end
+      parent.explorer.renderer:draw()
     end
   end
 end