move TreeFileNode.makeRoot() to NERDTree.changeRoot(node)

autoload/nerdtree/ui_glue.vim

@@ -140,9 +140,7 @@ endfunction
 " FUNCTION: s:chRoot(node) {{{1
 " changes the current root to the selected one
 function! s:chRoot(node)
-    call a:node.makeRoot()
-    call b:NERDTree.render()
-    call b:NERDTree.root.putCursorHere(0, 0)
+    call b:NERDTree.changeRoot(a:node)
 endfunction
 
 " FUNCTION: s:nerdtree#ui_glue#chRootCwd() {{{1

lib/nerdtree/bookmark.vim

@@ -275,9 +275,7 @@ function! s:Bookmark.toRoot()
         catch /^NERDTree.BookmarkedNodeNotFoundError/
             let targetNode = g:NERDTreeFileNode.New(s:Bookmark.BookmarkFor(self.name).path)
         endtry
-        call targetNode.makeRoot()
-        call b:NERDTree.render()
-        call targetNode.putCursorHere(0, 0)
+        call b:NERDTree.changeRoot(targetNode)
     endif
 endfunction
 

lib/nerdtree/nerdtree.vim

@@ -8,6 +8,28 @@ function! s:NERDTree.AddPathFilter(callback)
     call add(s:NERDTree.PathFilters(), a:callback)
 endfunction
 
+"FUNCTION: s:NERDTree.changeRoot(node) {{{1
+function! s:NERDTree.changeRoot(node)
+    if a:node.path.isDirectory
+        let self.root = a:node
+    else
+        call a:node.cacheParent()
+        let self.root = self.parent
+    endif
+
+    call self.root.open()
+
+    "change dir to the dir of the new root if instructed to
+    if g:NERDTreeChDirMode ==# 2
+        exec "cd " . self.root.path.str({'format': 'Edit'})
+    endif
+
+    call self.render()
+    call self.root.putCursorHere(0, 0)
+
+    silent doautocmd User NERDTreeNewRoot
+endfunction
+
 "FUNCTION: s:NERDTree.Close() {{{1
 "Closes the tab tree window for this tab
 function! s:NERDTree.Close()

lib/nerdtree/opener.vim

@@ -268,9 +268,7 @@ function! s:Opener._openDirectory(node)
     else
         call self._gotoTargetWin()
         if empty(self._where)
-            call a:node.makeRoot()
-            call b:NERDTree.render()
-            call a:node.putCursorHere(0, 0)
+            call b:NERDTree.changeRoot(a:node)
         elseif self._where == 't'
             call g:NERDTreeCreator.CreateTabTree(a:node.path.str())
         else

lib/nerdtree/tree_file_node.vim

@@ -218,26 +218,6 @@ function! s:TreeFileNode.isRoot()
     return self.equals(b:NERDTree.root)
 endfunction
 
-"FUNCTION: TreeFileNode.makeRoot() {{{1
-"Make this node the root of the tree
-function! s:TreeFileNode.makeRoot()
-    if self.path.isDirectory
-        let b:NERDTree.root = self
-    else
-        call self.cacheParent()
-        let b:NERDTree.root = self.parent
-    endif
-
-    call b:NERDTree.root.open()
-
-    "change dir to the dir of the new root if instructed to
-    if g:NERDTreeChDirMode ==# 2
-        exec "cd " . b:NERDTree.root.path.str({'format': 'Edit'})
-    endif
-
-    silent doautocmd User NERDTreeNewRoot
-endfunction
-
 "FUNCTION: TreeFileNode.New(path) {{{1
 "Returns a new TreeNode object with the given path and parent
 "