From c05615fd80141c3ab04459e75a42d2ed6f030e18 Mon Sep 17 00:00:00 2001
From: Phil Runninger <PhilRunninger@users.noreply.github.com>
Date: Fri, 15 Feb 2019 03:10:28 -0500
Subject: [PATCH] Set a maximum window size when zooming. (#950)

---
 doc/NERDTree.txt    | 3 +++
 lib/nerdtree/ui.vim | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/doc/NERDTree.txt b/doc/NERDTree.txt
index b86cdf1..174b7f7 100644
--- a/doc/NERDTree.txt
+++ b/doc/NERDTree.txt
@@ -702,6 +702,9 @@ the NERD tree. These settings should be set in your vimrc, using `:let`.
 |NERDTreeWinSize|             Sets the window size when the NERD tree is
                             opened.
 
+|NERDTreeWinSizeMax|          Sets the maximum window size when the NERD tree
+                            is zoomed.
+
 |NERDTreeMinimalUI|           Disables display of the 'Bookmarks' label and
                             'Press ? for help' text.
 
diff --git a/lib/nerdtree/ui.vim b/lib/nerdtree/ui.vim
index 32d96d9..5e3fcf1 100644
--- a/lib/nerdtree/ui.vim
+++ b/lib/nerdtree/ui.vim
@@ -503,7 +503,7 @@ function! s:UI.toggleZoom()
         exec "silent vertical resize ". size
         let b:NERDTreeZoomed = 0
     else
-        exec "vertical resize"
+        exec "vertical resize ". get(g:, 'NERDTreeWinSizeMax', '')
         let b:NERDTreeZoomed = 1
     endif
 endfunction