From f8da1fd6dbd558ebcc743bd7f91d35d6ca8db56a Mon Sep 17 00:00:00 2001
From: Andy Stewart <boss@airbladesoftware.com>
Date: Mon, 23 May 2016 10:31:17 +0100
Subject: [PATCH] Preserve screen line position when undoing a hunk.

Closes #346.
---
 autoload/gitgutter.vim | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/autoload/gitgutter.vim b/autoload/gitgutter.vim
index b0da84e..24a6c74 100644
--- a/autoload/gitgutter.vim
+++ b/autoload/gitgutter.vim
@@ -205,8 +205,11 @@ function! gitgutter#undo_hunk() abort
       let diff_for_hunk = gitgutter#diff#generate_diff_for_hunk(diff, 'undo')
       call gitgutter#utility#system(gitgutter#utility#command_in_directory_of_file(g:gitgutter_git_executable.' apply --reverse --unidiff-zero - '), diff_for_hunk)
 
-      " reload file
+      " reload file preserving screen line position
+      let wl = winline()
       silent edit
+      let offset = wl - winline()
+      execute "normal ".offset."\<C-Y>"
     endif
 
     silent! call repeat#set("\<Plug>GitGutterUndoHunk", -1)<CR>