From 42ce2919a34645ba57a07dfc6a68f62f75b23351 Mon Sep 17 00:00:00 2001
From: Jan Larres <jan@majutsushi.net>
Date: Tue, 4 Feb 2014 18:00:27 +1300
Subject: [PATCH] Allow configuring zoom, closes #189

---
 autoload/tagbar.vim | 13 +++++++++++--
 doc/tagbar.txt      | 16 ++++++++++++++++
 plugin/tagbar.vim   |  1 +
 3 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/autoload/tagbar.vim b/autoload/tagbar.vim
index a020036..ffefd56 100644
--- a/autoload/tagbar.vim
+++ b/autoload/tagbar.vim
@@ -1929,12 +1929,21 @@ endfunction
 " s:ZoomWindow() {{{2
 function! s:ZoomWindow() abort
     if s:is_maximized
-        execute 'vert resize ' . g:tagbar_width
+        execute 'vertical resize ' . g:tagbar_width
         execute s:winrestcmd
         let s:is_maximized = 0
     else
         let s:winrestcmd = winrestcmd()
-        vert resize
+        if g:tagbar_zoomwidth == 1
+            vertical resize
+        elseif g:tagbar_zoomwidth == 0
+            let func = exists('*strdisplaywidth') ? 'strdisplaywidth' : 'strlen'
+            let maxline = max(map(getline(line('w0'), line('w$')),
+                                \ func . '(v:val)'))
+            execute 'vertical resize ' . maxline
+        elseif g:tagbar_zoomwidth > 1
+            execute 'vertical resize ' . g:tagbar_zoomwidth
+        endif
         let s:is_maximized = 1
     endif
 endfunction
diff --git a/doc/tagbar.txt b/doc/tagbar.txt
index 06174a1..71aeeba 100644
--- a/doc/tagbar.txt
+++ b/doc/tagbar.txt
@@ -398,6 +398,22 @@ Example:
         let g:tagbar_width = 30
 <
 
+                                                          *g:tagbar_zoomwidth*
+g:tagbar_zoomwidth~
+Default: 1
+
+Width of the Tagbar window when zoomed.
+
+Possible values are:
+  1: Use the maximum width available.
+  0: Use the width of the longest currently visible tag.
+  >1: Use this width in characters.
+
+Example:
+>
+        let g:tagbar_zoomwidth = 0
+<
+
                                                           *g:tagbar_autoclose*
 g:tagbar_autoclose~
 Default: 0
diff --git a/plugin/tagbar.vim b/plugin/tagbar.vim
index 3ebe6e4..1615669 100644
--- a/plugin/tagbar.vim
+++ b/plugin/tagbar.vim
@@ -65,6 +65,7 @@ let s:options = [
     \ ['sort', 1],
     \ ['systemenc', &encoding],
     \ ['width', 40],
+    \ ['zoomwidth', 1],
 \ ]
 
 for [opt, val] in s:options