init.vim

syntax enable
set background=dark

set number	" Show line numbers
set linebreak	" Break lines at word (requires Wrap lines)
set showbreak=+++	" Wrap-broken line prefix
set textwidth=100	" Line wrap (number of cols)
set showmatch	" Highlight matching brace
set visualbell	" Use visual bell (no beeping)
 
set hlsearch	" Highlight all search results
set smartcase	" Enable smart-case search
set ignorecase	" Always case-insensitive
set incsearch	" Searches for strings incrementally
set breakindent " indent on word wraps
set clipboard=unnamed " use osx system clipboard
set list " show (some) whitespace characters 
 
set autoindent	" Auto-indent new lines
set expandtab	" Use spaces instead of tabs
set shiftwidth=4	" Number of auto-indent spaces
set smartindent	" Enable smart-indent
set smarttab	" Enable smart-tabs
set softtabstop=4	" Number of spaces per Tab

set ruler       " Show row and column ruler information
 
set undolevels=1000     " Number of undo levels
set backspace=indent,eol,start  " Backspace behaviour

" highlight the current line
set cursorline 

" Always show statusline
set laststatus=2

" Use 256 colours (Use this setting only if your terminal supports 256 colours)
set t_Co=256
colorscheme solarized
let $NVIM_TUI_ENABLE_TRUE_COLOR=1

" Easier split navigations
nnoremap <C-J> <C-W><C-J>
nnoremap <C-K> <C-W><C-K>
nnoremap <C-L> <C-W><C-L>
nnoremap <C-H> <C-W><C-H>
nnoremap x "_x
nnoremap d "_d
nnoremap D "_D
vnoremap d "_d

" More natural split opening
set splitbelow
set splitright


" Vim Plug 

call plug#begin('~/.vim/plugged')
Plug 'tpope/vim-sensible' " adds some basic options
Plug 'vim-airline/vim-airline' " status bar
Plug 'vim-airline/vim-airline-themes'
Plug 'scrooloose/nerdtree' " tree
Plug 'majutsushi/tagbar'
Plug 'honza/vim-snippets'
Plug 'ctrlpvim/ctrlp.vim' " fuzzy search with ctrl-p
Plug 'mileszs/ack.vim' " symbol search
call plug#end()


" vim-airline
let g:airline_theme = 'solarized'
let g:airline#extensions#syntastic#enabled = 1
let g:airline#extensions#branch#enabled = 1
let g:airline#extensions#tabline#enabled = 1
let g:airline#extensions#tagbar#enabled = 0

"" NERDTree configuration
let g:NERDTreeChDirMode=2
let g:NERDTreeIgnore=['\.rbc$', '\~$', '\.pyc$', '\.db$', '\.sqlite$', '__pycache__']
let g:NERDTreeSortOrder=['^__\.py$', '\/$', '*', '\.swp$', '\.bak$', '\~$']
let g:NERDTreeShowBookmarks=1
let g:nerdtree_tabs_focus_on_files=1
let g:NERDTreeMapOpenInTabSilent = '<RightMouse>'
let g:NERDTreeWinSize = 50
set wildignore+=*/tmp/*,*.so,*.swp,*.zip,*.pyc,*.db,*.sqlite
nnoremap <silent> <F2> :NERDTreeFind<CR>
noremap <F3> :NERDTreeToggle<CR>

" How can I close vim if the only window left open is a NERDTree? 
autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif

" tabline
:nnoremap <S-right> :bnext<CR>
:nnoremap <S-left> :bprevious<CR>

"*****************************************************************************
"" Convenience variables
"*****************************************************************************

" vim-airline
if !exists('g:airline_symbols')
  let g:airline_symbols = {}
endif

if !exists('g:airline_powerline_fonts')
  let g:airline#extensions#tabline#left_sep = ' '
  let g:airline#extensions#tabline#left_alt_sep = '|'
  let g:airline_left_sep          = '▶'
  let g:airline_left_alt_sep      = '»'
  let g:airline_right_sep         = '◀'
  let g:airline_right_alt_sep     = '«'
  let g:airline#extensions#branch#prefix     = '⤴' "➔, ➥, ⎇
  let g:airline#extensions#readonly#symbol   = '⊘'
  let g:airline#extensions#linecolumn#prefix = '¶'
  let g:airline#extensions#paste#symbol      = 'ρ'
  let g:airline_symbols.linenr    = '␊'
  let g:airline_symbols.branch    = '⎇'
  let g:airline_symbols.paste     = 'ρ'
  let g:airline_symbols.paste     = 'Þ'
  let g:airline_symbols.paste     = '∥'
  let g:airline_symbols.whitespace = 'Ξ'
else
  let g:airline#extensions#tabline#left_sep = ''
  let g:airline#extensions#tabline#left_alt_sep = ''

  " powerline symbols
  let g:airline_left_sep = ''
  let g:airline_left_alt_sep = ''
  let g:airline_right_sep = ''
  let g:airline_right_alt_sep = ''
  let g:airline_symbols.branch = ''
  let g:airline_symbols.readonly = ''
  let g:airline_symbols.linenr = ''
endif