From 978862bb977f2d33aeb340e05a702ce873a7730e Mon Sep 17 00:00:00 2001
From: Augusto Gunsch <augustogunsch@tutanota.com>
Date: Sun, 22 Aug 2021 17:22:04 -0300
Subject: [PATCH] Improve NERDTree

---
 config/nvim/init.vim | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/config/nvim/init.vim b/config/nvim/init.vim
index 2513bdb..4d30860 100644
--- a/config/nvim/init.vim
+++ b/config/nvim/init.vim
@@ -22,7 +22,7 @@ nnoremap _ ddkP
 let mapleader = " "
 let maplocalleader = ","
 
-nnoremap <leader>ev :vsplit $MYVIMRC<cr>
+nnoremap <leader>ev :tabnew $MYVIMRC<cr>
 nnoremap <leader>sv :source $MYVIMRC<cr>
 nnoremap <C-s> :%s//gc<left><left><left>
 nnoremap <C-w>t :tabnew<cr>
@@ -60,6 +60,19 @@ Plug 'tpope/vim-fugitive'
 
 call plug#end()
 
+nnoremap <C-n> :NERDTreeToggle<CR>
+
+augroup nerdtree
+	autocmd FileType c silent if !exists('b:NERDTree') | silent NERDTree | endif
+augroup END
+
+" Exit Vim if NERDTree is the only window remaining in the only tab.
+autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | quit | endif
+" Close the tab if NERDTree is the only window remaining in it.
+autocmd BufEnter * if winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | quit | endif
+" Open the existing NERDTree on each new tab.
+autocmd BufWinEnter * if getcmdwintype() == '' | silent NERDTreeMirror | endif
+
 let g:airline_theme = "powerlineish"
 let g:airline#extensions#tabline#enabled = 1
 let g:airline_powerline_fonts = 1