From 87b27802b57bbf383a812b57338fbab28499b7e8 Mon Sep 17 00:00:00 2001
From: Martin Grenfell <martin.grenfell@gmail.com>
Date: Fri, 1 May 2015 15:33:06 +0100
Subject: [PATCH] allow control over whether to reuse windows in different tabs

When opening a file we will "reuse" a window if the buffer is already
open somewhere.

Add an option to NERDTreeOpener to configure it to not reuse windows
across tabs.
---
 autoload/nerdtree/ui_glue.vim |  6 ++---
 lib/nerdtree/opener.vim       | 42 ++++++++++++++++++++++++-----------
 2 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/autoload/nerdtree/ui_glue.vim b/autoload/nerdtree/ui_glue.vim
index 8607389..0dd826d 100644
--- a/autoload/nerdtree/ui_glue.vim
+++ b/autoload/nerdtree/ui_glue.vim
@@ -93,13 +93,13 @@ endfunction
 "FUNCTION: s:activateDirNode() {{{1
 "handle the user activating a tree node
 function! s:activateDirNode(node)
-    call a:node.activate({'reuse': 1})
+    call a:node.activate()
 endfunction
 
 "FUNCTION: s:activateFileNode() {{{1
 "handle the user activating a tree node
 function! s:activateFileNode(node)
-    call a:node.activate({'reuse': 1, 'where': 'p'})
+    call a:node.activate({'reuse': 'all', 'where': 'p'})
 endfunction
 
 "FUNCTION: s:activateBookmark() {{{1
@@ -324,7 +324,7 @@ function! s:handleLeftClick()
                 if currentNode.path.isDirectory
                     call currentNode.activate()
                 else
-                    call currentNode.activate({'reuse': 1, 'where': 'p'})
+                    call currentNode.activate({'reuse': 'all', 'where': 'p'})
                 endif
                 return
             endif
diff --git a/lib/nerdtree/opener.vim b/lib/nerdtree/opener.vim
index 845e55c..14d1e2b 100644
--- a/lib/nerdtree/opener.vim
+++ b/lib/nerdtree/opener.vim
@@ -131,7 +131,8 @@ endfunction
 "  'where': Specifies whether the node should be opened in new split/tab or in
 "           the previous window. Can be either 'v' or 'h' or 't' (for open in
 "           new tab)
-"  'reuse': if a window is displaying the file then jump the cursor there
+"  'reuse': if a window is displaying the file then jump the cursor there. Can
+"           'all', 'currenttab' or empty to not reuse.
 "  'keepopen': dont close the tree window
 "  'stay': open the file, but keep the cursor in the tree win
 function! s:Opener.New(path, opts)
@@ -139,7 +140,13 @@ function! s:Opener.New(path, opts)
 
     let newObj._path = a:path
     let newObj._stay = nerdtree#has_opt(a:opts, 'stay')
-    let newObj._reuse = nerdtree#has_opt(a:opts, 'reuse')
+
+    if has_key(a:opts, 'reuse')
+        let newObj._reuse = a:opts['reuse']
+    else
+        let newObj._reuse = ''
+    endif
+
     let newObj._keepopen = nerdtree#has_opt(a:opts, 'keepopen')
     let newObj._where = has_key(a:opts, 'where') ? a:opts['where'] : ''
     let newObj._treetype = b:NERDTreeType
@@ -235,7 +242,7 @@ endfunction
 
 "FUNCTION: Opener._openFile() {{{1
 function! s:Opener._openFile()
-    if self._reuse && self._reuseWindow()
+    if self._reuseWindow()
         return
     endif
 
@@ -307,23 +314,32 @@ endfunction
 "
 "return 1 if we were successful
 function! s:Opener._reuseWindow()
+    if empty(self._reuse)
+        return 0
+    endif
+
     "check the current tab for the window
     let winnr = bufwinnr('^' . self._path.str() . '$')
     if winnr != -1
         call nerdtree#exec(winnr . "wincmd w")
         call self._checkToCloseTree(0)
         return 1
-    else
-        "check other tabs
-        let tabnr = self._path.tabnr()
-        if tabnr
-            call self._checkToCloseTree(1)
-            call nerdtree#exec('normal! ' . tabnr . 'gt')
-            let winnr = bufwinnr('^' . self._path.str() . '$')
-            call nerdtree#exec(winnr . "wincmd w")
-            return 1
-        endif
     endif
+
+    if self._reuse == 'currenttab'
+        return 0
+    endif
+
+    "check other tabs
+    let tabnr = self._path.tabnr()
+    if tabnr
+        call self._checkToCloseTree(1)
+        call nerdtree#exec('normal! ' . tabnr . 'gt')
+        let winnr = bufwinnr('^' . self._path.str() . '$')
+        call nerdtree#exec(winnr . "wincmd w")
+        return 1
+    endif
+
     return 0
 endfunction