vimrc

" This is not my grandfather's vi.
set nocompatible

" A gutter on the left hand side with the current line number
set number

" Highlight the current line
set cursorline

" Show up completions as a menu in the status bar.
set wildmenu

set scrolloff=3
set sidescrolloff=10
set wrap
set linebreak

" Spelling
setlocal spell
setlocal spelllang=en_gb
autocmd FileType coffee setlocal nospell

" Enable hidden buffer, and write files out automatically (which is what I had
" TextMate set to, so what could possibly go wrong?).
set hidden
set autowriteall

" Please do syntax highlighting
syntax on
set background=light

" When was the last time I tried to recover something with a swapfile?
set noswapfile

" Indenting
" Set an indent as two spaces, convert tabs to spaces, and indentation is
" filetype-specific.
set smartindent
set tabstop=2
set expandtab
set shiftwidth=2
filetype indent on
filetype plugin indent on

" Enhanced matching
runtime macros/matchit.vim

" Allow backspacing over indents, line breaks and before the start of insert
" mode.
set backspace=indent,eol,start

" Searching: incremental search, case insensitive unless caps are explicitly
" searched for and highlight the search term.
set incsearch
set ignorecase
set smartcase
set hlsearch
nnoremap <silent> <C-l> :<C-u>nohlsearch<CR><C-l>

" Folding. Default to indent, but if there's a syntax file for the current
" buffer, use syntax.
set foldmethod=indent
autocmd Syntax * set foldmethod=syntax

" Don't screw up folds when inserting text that might affect them, until
" leaving insert mode. Foldmethod is local to the window. Protect against
" screwing up folding when switching between windows.
autocmd InsertEnter * if !exists('w:last_fdm') | let w:last_fdm=&foldmethod | setlocal foldmethod=manual | endif
autocmd InsertLeave,WinLeave * if exists('w:last_fdm') | let &l:foldmethod=w:last_fdm | unlet w:last_fdm | endif

" Make Ruby's completion a little more comprehensive
let g:rubycomplete_rails = 1
let g:rubycomplete_buffer_loading = 1
let g:rubycomplete_classes_in_global = 1

" Stick the kitchen sink in the status line
set statusline=%f%m%r%h%w\ [TYPE=%Y\ %{&ff}/%{strlen(&fenc)?&fenc:&enc}]\ [%l/%L\ (%p%%)]\ %{fugitive#statusline()}\ %{tagbar#currenttag('[%s]','')}
set laststatus=2

" OpenURL command required by rails.vim.
:command -bar -nargs=1 OpenURL :!open <args>
let g:rails_url='http://localhost:5000/'

" Make the GUI in MacVim a little more pleasant
set guifont=Source\ Code\ Pro\ Medium:h12
set guioptions-=T

" Highlight trailing whitespace, 'cos I dislike that sort of thing.
highlight ExtraWhitespace ctermbg=red guibg=red
match ExtraWhitespace /\s\+$/
autocmd BufWinEnter * match ExtraWhitespace /\s\+$/
autocmd InsertEnter * match ExtraWhitespace /\s\+\%#\@<!$/
autocmd InsertLeave * match ExtraWhitespace /\s\+$/
autocmd BufWinLeave * call clearmatches()

" Switch on rainbow parentheses by default.
au VimEnter * RainbowParenthesesToggle
au Syntax * RainbowParenthesesLoadRound
au Syntax * RainbowParenthesesLoadSquare
au Syntax * RainbowParenthesesLoadBraces

" Show up magic characters
set list!
set listchars=tab:▸\ ,eol:¬,nbsp:~

" Map the tabularize plugin to something a little more helpful for aligning =,
" => and :.
nmap <Leader>a=       :Tabularize /[<>=]\+<CR>
vmap <Leader>a=       :Tabularize /[<>=]\+<CR>
nmap <Leader>a:       :Tabularize /:\zs/l0l1<CR>
vmap <Leader>a:       :Tabularize /:\zs/l0l1<CR>
nmap <Leader>a<Space> :Tabularize / \+/l0<CR>
vmap <Leader>a<Space> :Tabularize / \+/l0<CR>
nmap <Leader>a,       :Tabularize /,\zs/l0l1<CR>
vmap <Leader>a,       :Tabularize /,\zs/l0l1<CR>

" %% expands to the directory of the current file
cnoremap %% <C-R>=expand('%:h').'/'<cr>

" Shortcut keys for navigating around the command line like I'm used to
cnoremap <C-a> <Home>
cnoremap <Esc>b <S-Left>
cnoremap <Esc>f <S-Right>

" :w!! will write the file out as root instead. Handy when you forget to...
cmap w!! w !sudo tee % >/dev/null

" Select the thing you last pasted
nnoremap <expr> gp '`[' . strpart(getregtype(), 0, 1) . '`]'

let g:tagbar_compact = 1
let g:tagbar_width = 30

" Go to the next line. Can't believe it's taken me this long to use this
" shortcut...
imap <M-o> <Esc>o

" Reformat the current paragraph I'm typing.
imap <Leader>p <esc>m'gq$<C-o>a
nmap <Leader>p m'gq$<C-o>

" Save the current buffer
imap <C-s> <esc>:w<CR>a
nmap <C-s> :w<CR>
imap <Leader>w <esc>:w<CR>a
nmap <Leader>w :w<CR>

" Automatically quit if there's an existing open session (because that's what
" I always do).
augroup NoSimultaneousEdits autocmd!
  autocmd SwapExists * let v:swapchoice = 'q'
  autocmd SwapExists * echo 'Duplicate edit session, go find the original!'
  autocmd SwapExists * echohl None
  autocmd SwapExists * sleep 2
augroup END

" Highlight the 81st column of wide lines. 80 columns is more of a guideline
" than an absolute rule...
highlight ColorColumn ctermbg=green ctermfg=white
call matchadd('ColorColumn', '\%81v', 100)