.vimrc

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" Many things here stolen from http://amix.dk/vim/vimrc.html "
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if filereadable($HOME . "/.vim/autoload/pathogen.vim")
  call pathogen#infect()
endif

" UTF-8 is the future
set encoding=utf-8
setglobal fileencoding=utf-8
set nobomb
set fileencodings=ucs-bom,utf-8,iso-8859-1

" Default to unix EOLs, but handle others gracefully
set ffs=unix,dos,mac

" Don't try to redraw in the middle of a macro
set lazyredraw

" 256 colors and syntax highlighting
set t_Co=256
colorscheme space-vim-dark
syntax on

" Turn on line numbering and position indicators...
set number numberwidth=6
set ruler
" And enable mouse support to prevent copying line numbers, etc
set mouse=a

" Display last line even if too long; use <xx>
set display=lastline,uhex

" Display invisible characters
set listchars=tab:↹·,extends:⇉,precedes:⇇,nbsp:␠,trail:␠,nbsp:␣

" Use 'tabs are actually 4 spaces' and intelligent indenting
set tabstop=8
set softtabstop=2
set shiftwidth=2
set shiftround
set expandtab
set smarttab
set autoindent
set smartindent

" But also make smartindent not terrible for Python comments
inoremap # X#

" Make backspace work nicely
set backspace=indent,eol,start

" Incremental search with intelligent case-sensitivity
set incsearch
set ignorecase smartcase

" When moving the screen, keep some context
set scrolloff=2

" Tab completion when in insert mode and not indenting
function! CleverTab()
  if strpart( getline('.'), col('.')-2, 1 ) =~ '^\s*$'
    return "\<Tab>"
  else
    return "\<C-N>"
endfunction
inoremap <Tab> <C-R>=CleverTab()<CR>

" Modeline support
set modeline
set modelines=3

" File type detection
filetype on
filetype plugin on

" Ignore compiled files when completing paths
set wildignore=*.o,*~,*.pyc,*.pyo,*.class,*.hi

" Persistent undo
set undodir=~/.vim/undo
set undofile

" Readable wrapping
set wrap linebreak


" KEYBINDINGS
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" Unbind the arrow keys (old habits die hard)
noremap <left> <C-w><left>
noremap <up> <C-w><up>
noremap <down> <C-w><down>
noremap <right> <C-w><right>

" Bind jk/kj in insert to <esc>
inoremap jk <esc>
inoremap kj <esc>


" Use the comma key for extra key combos
let mapleader = ","
let g:mapleader = ","

" ,m = remove carriage returns
noremap <leader>m mmHmt:%s/<C-V><cr>//ge<cr>'tzt'm

" ,ss = toggle spell check
noremap <leader>ss :setlocal spell!<cr>

" ,80 = set window width to 80 (plus room for gutter)
noremap <leader>80 :vertical resize 86<cr>


" ABBREVIATIONS (Mostly typo fixes)
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iabbrev waht what
iabbrev adn and
iabbrev tehn then
iabbrev taht that
iabbrev tahn than

" Also expand %% in command mode to same dir as current file
cabbr <expr> %% expand('%:.:h')


" TRIGGERED ACTIONS
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" These are grouped to prevent duplication when sourcing
augroup vimrc
  autocmd!
  " Remember info about open buffers on close...
  set viminfo^=%
  " and return to last edit position when opening files
  autocmd BufReadPost *
       \ if line("'\"") > 0 && line("'\"") <= line("$") |
       \   exe "normal! g`\"" |
       \ endif

  " Delete trailing whitespace on save in .py files
  func! DeleteTrailingWS()
    exe "normal mz"
    %s/\s\+$//ge
    exe "normal `z"
  endfunc
  autocmd BufWrite *.py :call DeleteTrailingWS()

  " Force .md to be markdown
  autocmd BufNewFile,BufReadPost *.md set filetype=markdown

  " Automatically reload .vimrc when it is saved
  autocmd BufWritePost $MYVIMRC source $MYVIMRC
augroup END