init.vim

" Plugins (with Plug) {{{
call plug#begin('~/.local/share/nvim/plugged')

Plug 'tpope/vim-fugitive' " Git plugin
Plug 'scrooloose/nerdtree'
Plug 'scrooloose/nerdcommenter'
Plug 'mbbill/undotree'
Plug 'altercation/vim-colors-solarized' " Colour scheme plugin
Plug 'vim-airline/vim-airline' " Status bar line at the bottom of the screen
Plug 'vim-airline/vim-airline-themes' " Themes for vim airline
Plug 'ctrlpvim/ctrlp.vim' " Fuzzy file search
Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }
let g:deoplete#enable_at_startup = 1
Plug 'tbodt/deoplete-tabnine', { 'do': './install.sh' }

" End of of Plug code
" Initialize plugin system
call plug#end()
" }}}

" System Settings {{{
set clipboard=unnamed
" }}}

" Tabs and spaces settings {{{
set tabstop=4 " Tabs are 4 spaces
set expandtab " When a tab is inserted, 4 spaces are inserted in lieu of the tab
set softtabstop=4   " number of spaces in tab when editing
set shiftwidth=4 " Shifting with << or >> will only be 4 spaces
setlocal textwidth=79
set modelines=1
filetype indent on
filetype plugin on
set autoindent
set backspace=indent,eol,start " Make sure backspace works properly
" }}}

" UI & Colourscheme {{{
set relativenumber	" Show the number of lines above and below cursor line
set number
set background=light
let g:solarized_termcolors=256
colorscheme solarized " Use solarized colourscheme
set showcmd " Show the command being entered in the bottom
set wildmenu " Visual autocomplete for vim commands
set lazyredraw " Vim won't redraw the screen as often
" }}}

" Folding Settings {{{
set foldenable          " enable folding
set foldlevelstart=99   " open most folds by default
set foldmethod=indent   " Folding level is determined by indentation
" space open/closes folds
nnoremap <space> za
" }}}

" Movement settings {{{
" move vertically by visual line, so on long lines, don't miss
" nnoremap <leader>jj <CR>L zt<CR>
" nnoremap <leader>k <CR>H zb<CR>
set scrolloff=3                 " Keep at least 3 lines above/below
set sidescrolloff=3             " Keep at least 3 lines left/right
" highlight last inserted text
nnoremap gV `[v`]
set mouse=a
" }}}

" Leader shortcuts {{{
let mapleader="," " leader is comma
nnoremap <leader>ev :tabnew $MYVIMRC<CR>
nnoremap <leader>ez :tabnew ~/.zshrc<CR>
nnoremap <leader>sv :source $MYVIMRC<CR>
nnoremap <leader>cd :cd %:p:h<CR>:pwd<CR>
nnoremap <leader>s :mksession<CR>
nnoremap <leader>rl :call ToggleNumber()<CR> " Switch between absolute and relative line number
" }}}

" UndoTree Settings {{{
nnoremap <leader>u :UndotreeToggle<CR>
if has("persistent_undo")
    set undodir=$HOME"/.undodir"
    set undofile
endif
" }}}

" Opening new Buffer Behaviour {{{
set splitbelow                  " Horizontal split below
set splitright                  " Vertical split right
set switchbuf+=usetab,newtab
" }}}

" Search settings {{{
set incsearch           " search as characters are entered
set hlsearch            " highlight matches
set ignorecase                  " Case-insensitive search
set smartcase                   " Unless search contains uppercase letter
" turn off search highlight with ,
nnoremap <leader><space> :nohlsearch<CR>
set wildignore+=*/.git/*,*/tmp/*,*.swp " Tell vim to ignore these files
nnoremap K :grep! "\b<C-R><C-W>\b"<CR>:cw<CR> " K searches for word under key }}}

" AutoGroups {{{
augroup configgroup
    autocmd!
    autocmd VimEnter * highlight clear SignColumn
    autocmd BufEnter *.cls setlocal filetype=java
    autocmd BufEnter *.zsh-theme setlocal filetype=zsh
    autocmd BufEnter Makefile setlocal noexpandtab
    autocmd BufEnter *.sh setlocal tabstop=2
    autocmd BufEnter *.sh setlocal shiftwidth=2
    autocmd BufEnter *.sh setlocal softtabstop=2
    " Filetype python nnoremap <buffer> <F9> :exec '!python' shellescape(@%, 1)<cr>
    autocmd BufEnter *.md setlocal ft=markdown
augroup END
" }}}

" Pick what search tool to use {{{
" Searching with ripgrep, silver-searcher or ack depending what's installed
if executable('rg')
    set grepprg=rg\ --vimgrep
    set grepformat=%f:%l:%c:%m
    let g:ctrlp_user_command = 'rg %s --files --color=never --glob ""'
    let g:ctrlp_use_caching = 0
    nnoremap <leader>g :vimgrep
elseif executable('ag')
    set grepprg=ag\ --vimgrep\ --ignore=\"**.min.js\"
    set grepformat=%f:%l:%c:%m,%f:%l:%m
    let g:ctrlp_user_command = 'ag %s -l --nocolor -g ""'
    let g:ctrlp_use_caching = 0
    nnoremap <leader>g :!Ag
elseif executable('ack')
    set grepprg=ack\ --nogroup\ --nocolor\ --ignore-case\ --column
    set grepformat=%f:%l:%c:%m,%f:%l:%m
endif
" }}}

" CtrlP settings {{{
let g:ctrlp_match_window = 'bottom,order:ttb'
let g:ctrlp_switch_buffer = 0
let g:ctrlp_working_path_mode = 0
let g:ctrlp_custom_ignore = '*.o'
let g:ctrlp_user_command = ['.git', 'cd %s && git ls-files -co --exclude-standard'] "Ignore files in gitignore
" }}}

" NERDTree {{{
" If no file specified, enter NERDTree on vim startup
" autocmd StdinReadPre * let s:std_in=1
" autocmd VimEnter * if argc() == 0 && !exists("s:std_in") | NERDTree | endif
nnoremap <leader>n :NERDTreeToggle<CR>
" }}}

" NERDCommenter {{{

let g:NERDSpaceDelims = 1 " Add spaces after comment delimiters by default
let g:NERDCompactSexyComs = 1 " Use compact syntax for prettified multi-line comments
let g:NERDDefaultAlign = 'left' " Align line-wise comment delimiters flush left instead of following code indentation
let g:NERDCommentEmptyLines = 1 " Allow commenting and inverting empty lines (useful when commenting a region)
let g:NERDTrimTrailingWhitespace = 1 " Enable trimming of trailing whitespace when uncommenting
" }}}

" Vim Airline {{{
set laststatus=2
set ttimeoutlen=50
let g:airline_left_sep = ''
let g:airline_left_sep = ''
let g:airline_right_sep = ''
let g:airline_right_sep = ''
let g:airline_powerline_fonts = 1
let g:airline_theme = 'badwolf'
let g:airline_powerline_fonts = 1
" }}}

" Save Vim backups in a more convenient place {{{
set backup
set backupdir=~/.vim-tmp,~/.tmp,~/tmp,/var/tmp,/tmp
set backupskip=/tmp/*,/private/tmp/*
set directory=~/.vim-tmp,~/.tmp,~/tmp,/var/tmp,/tmp
set writebackup
" }}}

" Deoplete   {{{
inoremap <expr><TAB>  pumvisible() ? "\<C-n>" : "\<TAB>" " Tab completion
" }}}

" Functions {{{
" toggle between number and relativenumber
func! ToggleNumber()
    if(&relativenumber == 1)
        set norelativenumber
        set number
    else
        set relativenumber
    endif
endfu
com! TN call ToggleNumber()

" Word Processing Mode - English spell check
func! WordProcessorMode()
 setlocal textwidth=80
 setlocal spell spelllang=en_us
 setlocal noexpandtab
 setlocal colorcolumn=80
endfu
com! WP call WordProcessorMode()
"}}}

" Git (Fugitive) Settings {{{
nnoremap <leader>gb :Gblame<CR>
" }}}
"
" vim:foldmethod=marker:foldlevel=0