From 642c2b76fc5a3b11333bcc060c38f71fc3110fa8 Mon Sep 17 00:00:00 2001
From: Martin Grenfell <martin_grenfell@msn.com>
Date: Sat, 7 Jun 2008 17:36:14 +1200
Subject: [PATCH] add oFileNode#MakeRoot() and refactor s:ChRoot()

not that as of this commit, you can now use the C mapping on a file node
and its parent dir node will become the new root
---
 plugin/NERD_tree.vim | 33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/plugin/NERD_tree.vim b/plugin/NERD_tree.vim
index 2eb71f5..cf6961e 100644
--- a/plugin/NERD_tree.vim
+++ b/plugin/NERD_tree.vim
@@ -290,6 +290,22 @@ function! s:oTreeFileNode.IsRoot() dict
     return self.Equals(t:NERDTreeRoot)
 endfunction
 
+"FUNCTION: oTreeFileNode.MakeRoot() {{{3
+"Make this node the root of the tree
+function! s:oTreeFileNode.MakeRoot() dict
+    if self.path.isDirectory
+        let t:NERDTreeRoot = self
+    else
+        let t:NERDTreeRoot = self.parent
+    endif
+
+    call t:NERDTreeRoot.Open()
+
+    "change dir to the dir of the new root if instructed to
+    if g:NERDTreeChDirMode == 2
+        exec "cd " . t:NERDTreeRoot.path.StrForEditCmd()
+    endif
+endfunction
 "FUNCTION: oTreeFileNode.New(path) {{{3 
 "Returns a new TreeNode object with the given path and parent
 "
@@ -2507,23 +2523,12 @@ endfunction
 " changes the current root to the selected one
 function! s:ChRoot() 
     let treenode = s:GetSelectedNode()
-    if treenode == {} || treenode.path.isDirectory == 0
-        call s:Echo("Select a directory node first")
+    if treenode == {}
+        call s:Echo("Select a node first")
         return
     endif
 
-    if treenode.isOpen == 0
-        call treenode.Open()
-    endif
-
-    let t:NERDTreeRoot = treenode
-    
-    "change dir to the dir of the new root if instructed to 
-    if g:NERDTreeChDirMode == 2
-        exec "cd " . treenode.path.StrForEditCmd()
-    endif
-
-
+    call treenode.MakeRoot()
     call s:RenderView()
     call s:PutCursorOnNode(t:NERDTreeRoot, 0, 0)
 endfunction