""""""""""""""""""""""
"""Nvim config file"""
""""""""""""""""""""""
" Save this file to ~/.config/nvim/init.vim

" Fixes weird character problem in some devel versions neovim under tmux sesssion. This might go away in future.
set guicursor=

" Uses color scheme southernlights from Jakson Alves de Aquino here: https://github.com/jalvesaq/southernlights
" To enable it, save file southernlights.vim to ~/.config/nvim/colors/ 
colorscheme southernlights

" Preferred default settings
set nowrap

" start R with F2 key
" map <F2> <Plug>RStart 
" imap <F2> <Plug>RStart
" vmap <F2> <Plug>RStart
" R version can be specified like this:
" let vimrplugin_r_path = "/opt/R/3.1.2-release/bin/R"
" Send selection or line to R with space bar, respectively.
vmap <Space> <Plug>RDSendSelection
nmap <Space> <Plug>RDSendLine

" Shortcut for R's assignment operator: 0 turns it off; 1 assigns underscore; 2 assigns two underscores
let R_assign = 2

" Ensures usage of your own ~/.tmux.conf file
let R_notmuxconf = 1

" Shows function arguments in a separate viewport during omni completion with Ctrl-spacebar (or Ctrl-x Ctrl-o:w)
" let R_show_args = 1

" Use Ctrl-Space to do omnicompletion
inoremap <C-Space> <C-x><C-o>

" Remove white background of status line at bottom of nvim viewport (default is 2)
set laststatus=1

"let R_in_buffer = 0
"let R_tmux_split = 1
"let R_applescript = 0
"let R_tmux_close = 0

" The following provides a zoom functionality, similar to Tmux's Ctrl-a z, by pressing 'gz' in normal mode. 
function ZoomWindow()
        let cpos = getpos(".")
        tabnew %
        redraw
        call cursor(cpos[1], cpos[2])
        normal! zz
    endfunction
    nmap gz :call ZoomWindow()<CR>

"""""""""""""""""""""
"""NERDTree Plugin"""
"""""""""""""""""""""
" Installation
"       - Download NERDTree plugin from here
"         http://www.vim.org/scripts/script.php?script_id=1658
"       - unzip nerdtree.zip -d ~/.vim
"
" Usage
"   - '?' opens quick help
"   - 'zz' opens and 'q' closes NERDTree ('zz 'requires setting below)
"       - 't' opens file in new tab
"       - 'T' opens file in new tab silently
"   - 'gt' and 'gT' switch between tabs
"       - 'm' opens menu mode for creating/deleting files, 'Ctrl-c' to exit out of this mode   
"
" Settings
" Opens NERDTree with custom shortcut, here 'zz'
let mapleader = "z" 
nmap <leader>z :NERDTreeToggle<cr>

" Instruct NERDTree to always opens in the current folder
"set autochdir
"let NERDTreeChDirMode=2
"nnoremap <leader>n :NERDTree .<CR>

" Optional to show special NERDTree browser characters properly (e.g. on remote linux system) 
let g:NERDTreeDirArrows=0

" Show bookmarks by default
let NERDTreeShowBookmarks=1
"""""""""""""""""""""""

" ThG: install plugins with vim-plug plugin manager (here Nvim-R and nerdtree)
" Plugins will be downloaded under the specified directory.
call plug#begin(has('nvim') ? stdpath('data') . '/plugged' : '~/.vim/plugged')                               
" Declare the list of plugins.                               
Plug 'jalvesaq/Nvim-R'                    
Plug 'preservim/nerdtree'
Plug 'jalvesaq/vimcmdline'
" List ends here. Plugins become visible to Vim after this call.                          
call plug#end()