From c5981de29bceb91cec83dd67c89708b96859b56f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thorsten=20Wi=C3=9Fmann?= <edu@thorsten-wissmann.de>
Date: Wed, 4 Jan 2017 22:20:19 +0100
Subject: [PATCH] Provide reasonable scroll context in VSplit mode

In VSplit mode, show all entries if the minibufexpl window is big
enough. If the window is not big enough, keep as few lines as possible
unused/empty.
---
 plugin/minibufexpl.vim | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/plugin/minibufexpl.vim b/plugin/minibufexpl.vim
index e2b3348..0a95b20 100644
--- a/plugin/minibufexpl.vim
+++ b/plugin/minibufexpl.vim
@@ -1094,10 +1094,14 @@ function! <SID>DisplayBuffers(curBufNum)
 
   " Place cursor at current buffer in MBE
   if !<SID>IsBufferIgnored(a:curBufNum)
-    if !g:miniBufExplShowBufNumbers
-      call search('\V['.s:bufUniqNameDict[a:curBufNum].']', 'w')
+    if !g:miniBufExplVSplit
+      if !g:miniBufExplShowBufNumbers
+        call search('\V['.s:bufUniqNameDict[a:curBufNum].']', 'w')
+      else
+        call search('\V['.a:curBufNum.':'.s:bufUniqNameDict[a:curBufNum].']', 'w')
+      endif
     else
-      call search('\V['.a:curBufNum.':'.s:bufUniqNameDict[a:curBufNum].']', 'w')
+      call cursor(a:curBufNum, 0)
     endif
   endif
 
@@ -1206,6 +1210,11 @@ function! <SID>ResizeWindow()
       call <SID>DEBUG('ResizeWindow to '.l:newWidth.' columns',9)
       exec 'vertical resize '.l:newWidth
     endif
+    " if there are more than enough entries in both directions
+    " then center the selected line
+    let l:lines = winheight('%') / 2
+    exec 'setlocal scrolloff='.l:lines
+
 
     let saved_ead = &ead
     let &ead = 'hor'
@@ -1257,6 +1266,11 @@ function! <SID>ShowBuffers()
   put! =s:miniBufExplBufList
   silent $ d _
 
+  " in VSplit scroll the viewport as topmost as possible
+  if g:miniBufExplVSplit == 1
+    call cursor(1,0)
+  endif
+
   " Prevent the buffer from being modified.
   setlocal nomodifiable