vimrc

" vimrc
" Current author: David Majnemer
" Original author: Saleem Abdulrasool <compnerd@compnerd.org>
" vim: set ts=3 sw=3 et nowrap:

if has('multi_byte')      " Make sure we have unicode support
   scriptencoding utf-8    " This file is in UTF-8

   " ---- Terminal Setup ----
   if (&termencoding == "" && (&term =~ "xterm" || &term =~ "putty")) || (&term =~ "rxvt-unicode") || (&term =~ "screen") || (&term =~ "toaru")
      set termencoding=utf-8
   endif
   if ($COLORTERM =~ "putty")
      set termencoding=latin
   endif
   set encoding=utf-8      " Default encoding should always be UTF-8
endif

if (&term =~ "screen")
   set ttymouse=xterm2
endif

" ---- General Setup ----
set nocompatible           " Don't emulate vi's limitations
set tabstop=4              " 4 spaces for tabs
set shiftwidth=4           " 4 spaces for indents
set smarttab               " Tab next line based on current line
"set expandtab             " Spaces for indentation
set autoindent             " Automatically indent next line
if has('smartindent')
   set smartindent            " Indent next line based on current line
endif
"set linebreak             " Display long lines wrapped at word boundaries
set incsearch              " Enable incremental searching
set hlsearch               " Highlight search matches
set ignorecase             " Ignore case when searching...
set smartcase              " ...except when we don't want it
set infercase              " Attempt to figure out the correct case
set showfulltag            " Show full tags when doing completion
set virtualedit=block      " Only allow virtual editing in block mode
set lazyredraw             " Lazy Redraw (faster macro execution)
set wildmenu               " Menu on completion please
set wildmode=longest,full  " Match the longest substring, complete with first
set wildignore=*.o,*~      " Ignore temp files in wildmenu
set scrolloff=3            " Show 3 lines of context during scrolls
set sidescrolloff=2        " Show 2 columns of context during scrolls
set backspace=2            " Normal backspace behavior
"set textwidth=80           " Break lines at 80 characters
set hidden                 " Allow flipping of buffers without saving
set noerrorbells           " Disable error bells
set visualbell             " Turn visual bell on
set t_vb=                  " Make the visual bell emit nothing
set showcmd                " Show the current command
set number " I just like numbers?

set diffopt+=iwhite

" ---- Filetypes ----
if has('syntax')
   syntax on
endif

if has('eval')
   filetype on             " Detect filetype by extension
   filetype indent on      " Enable indents based on extensions
   filetype plugin on      " Load filetype plugins
endif

" ---- Folding ----
if has('eval')
   fun! WideFold()
      if winwidth(0) > 90
         setlocal foldcolumn=1
      else
         setlocal foldcolumn=0
      endif
   endfun

   let g:detectindent_preferred_expandtab = 0
   let g:detectindent_preferred_indent = 4

   fun! <SID>DetectDetectIndent()
      try
         :DetectIndent
      catch
      endtry
   endfun

   fun! ToggleFoldColumn()
      if &foldcolumn == 1
         set foldcolumn=3
      elseif &foldcolumn == 3
         set foldcolumn=0
      else
         set foldcolumn=1
      endif
   endfun
   nnoremap <F3> :call ToggleFoldColumn()<CR>
endif

if has('autocmd')
   autocmd BufEnter * :call WideFold()
   if has('eval')
      autocmd BufReadPost * :call s:DetectDetectIndent()
   endif

   if has('viminfo')
      autocmd BufReadPost *
         \ if line("'\"") > 0 && line("'\"") <= line("$") |
         \   exe "normal g`\"" |
         \ endif
   endif
endif

" ---- Spelling ----
if (v:version >= 700)
   set spelllang=en_us        " US English Spelling please

   " Toggle spellchecking with F10
   nmap <silent> <F10> :silent set spell!<CR>
   imap <silent> <F10> <C-O>:silent set spell!<CR>
endif

" Display a pretty statusline if we can
if has('title')
   set title
endif
set laststatus=2
set shortmess=atI
if has('statusline')
   set statusline=%<%F\ %r[%{&ff}]%y%m\ %=\ Line\ %l\/%L\ Col:\ %v\ (%P)
endif

" Enable modelines only on secure vim
if (v:version == 603 && has("patch045")) || (v:version > 603)
   set modeline
   set modelines=3
else
   set nomodeline
endif

" Shamelessly stolen from Ciaran McCreesh <ciaranm@ciaranm.org>
if has('eval')
   fun! LoadColorScheme(schemes)
      let l:schemes = a:schemes . ":"

      while l:schemes != ""
         let l:scheme = strpart(l:schemes, 0, stridx(l:schemes, ":"))
         let l:schemes = strpart(l:schemes, stridx(l:schemes, ":") + 1)

         try
            exec "colorscheme" l:scheme
            break
         catch
         endtry
      endwhile
   endfun

   if has("gui_running")
      call LoadColorScheme("wombat:twilight256:desert")
   elseif &t_Co == 256
      call LoadColorScheme("wombat:twilight256:inkpot")
   elseif &t_Co == 88
      call LoadColorScheme("wombat:zellner")
   else
      call LoadColorScheme("wombat:darkblue:zellner")
   endif
endif

" Show trailing whitespace visually
" Shamelessly stolen from Ciaran McCreesh <ciaranm@gentoo.org>
if (&termencoding == "utf-8") || has("gui_running")
   if v:version >= 700
      set list listchars=tab:»·,trail:·,extends:…,nbsp:‗
   else
      set list listchars=tab:»·,trail:·,extends:…
   endif
else
   if v:version >= 700
      set list listchars=tab:>-,trail:.,extends:>,nbsp:_
   else
      set list listchars=tab:>-,trail:.,extends:>
   endif
endif

if has('mouse')
   " Dont copy the listchars when copying
   set mouse=nvi
endif

if has('autocmd')
   " always refresh syntax from the start
   autocmd BufEnter * syntax sync fromstart

   " subversion commit messages need not be backed up
   autocmd BufRead svn-commit.tmp :setlocal nobackup

   " mutt does not like UTF-8
   autocmd BufRead,BufNewFile *
      \ if &ft == 'mail' | set fileencoding=iso8859-1 | endif

   " fix up procmail rule detection
   autocmd BufRead procmailrc :setfiletype procmail
endif

" ---- cscope/ctags setup ----
if has('cscope') && executable('cscope') == 1
   " Search cscope and ctags, in that order
   set cscopetag
   set cscopetagorder=0

   set nocsverb
   if filereadable('cscope.out')
      cs add cscope.out
   endif
   set csverb
endif

" ---- Key Mappings ----

" improved lookup
if has('eval')
   fun! GoDefinition()
      let pos = getpos(".")
      normal! gd
      if getpos(".") == pos
         exe "tag " . expand("<cword>")
      endif
   endfun

   nmap <C-]> :call GoDefinition()<CR>
endif

if has('autocmd')
   " Shortcuts
   if has('eval')
      fun! <SID>cabbrev()
         iab #i #include
         iab #I #include

         iab #d #define
         iab #D #define

         iab #e #endif
         iab #E #endif
      endfun

      autocmd FileType c,cpp :call <SID>cabbrev()

      autocmd BufRead,BufNewFile *.mm set filetype=noweb
      autocmd BufRead,BufNewFile *.scala set filetype=scala
      autocmd BufRead,BufNewFile *.proto setfiletype proto
   endif

   " make tab reindent in normal mode
   autocmd FileType c,cpp,cs,java nmap <Tab> =0<CR>
endif

" Append modeline after last line in buffer.
" Use substitute() (not printf()) to handle '%%s' modeline in LaTeX files.
if has('eval')
   fun! AppendModeline()
      let save_cursor = getpos('.')
      let append = ' vim: set ts='.&tabstop.' sw='.&shiftwidth.' tw='.&textwidth.': '
      $put =substitute(&commentstring, '%s', append, '')
      call setpos('.', save_cursor)
   endfun
   nnoremap <silent> <Leader>ml :call AppendModeline()<CR>
endif

" tab indents selection
vmap <silent> <Tab> >gv

" shift-tab unindents
vmap <silent> <S-Tab> <gv

" Page using space
noremap <Space> <C-F>

" shifted arrows are stupid
inoremap <S-Up> <C-O>gk
noremap  <S-Up> gk
inoremap <S-Down> <C-O>gj
noremap  <S-Down> gj

" Y should yank to EOL
map Y y$

" vK is stupid
vmap K k

" :W and :Q are annoying
if has('user_commands')
   command! -nargs=0 -bang Q q<bang>
   command! -nargs=0 -bang W w<bang>
   command! -nargs=0 -bang WQ wq<bang>
   command! -nargs=0 -bang Wq wq<bang>
endif

" just continue
nmap K K<cr>

" stolen from auctex.vim
if has('eval')
   fun! EmacsKill()
      if col(".") == strlen(getline(line(".")))+1
         let @" = "\<CR>"
         return "\<Del>"
      else
         return "\<C-O>D"
      endif
   endfun
endif

" some emacs-isms are OK
map! <C-a> <Home>
map  <C-a> <Home>
map! <C-e> <End>
map  <C-e> <End>
imap <C-f> <Right>
imap <C-b> <Left>
map! <M-BS> <C-w>
map  <C-k> d$
if has('eval')
   inoremap <buffer> <C-K> <C-R>=EmacsKill()<CR>
endif

" w!! for sudo w!
cmap w!! w !sudo tee % >/dev/null

" clear search
"nnoremap <esc> :noh<return><esc>

" Disable q and Q
map q <Nop>
map Q <Nop>

" Toggle numbers with F12
nmap <silent> <F12> :silent set number!<CR>
imap <silent> <F12> <C-O>:silent set number!<CR>
noremap <silent> <F4> :set hls!<CR>

" Don't force column 0 for #
inoremap # X<BS>#

" Always map <C-h> to backspace
" Both interix and cons use C-? as forward delete,
" besides those two exceptions, always set it to backspace
" Also let interix use ^[[U for end and ^[[H for home
map  <C-h> <BS>
map! <C-h> <BS>
if (&term =~ "interix")
   map  <C-?> <DEL>
   map! <C-?> <DEL>
   map <C-[>[H <Home>
   map <C-[>[U <End>
elseif (&term =~ "^sun")
   map  <C-?> <DEL>
   map! <C-?> <DEL>
elseif (&term !~ "cons")
   map  <C-?> <BS>
   map! <C-?> <BS>
endif

if (&term =~ "^xterm")
   map  <C-[>[H <Home>
   map! <C-[>[H <Home>
   map  <C-[>[F <End>
   map! <C-[>[F <End>
   map  <C-[>[5D <C-Left>
   map! <C-[>[5D <C-Left>
   map  <C-[>[5C <C-Right>
   map! <C-[>[5C <C-Right>
endif

" Terminal.app does not support back color erase
if ($TERM_PROGRAM ==# "Apple_Terminal" && $TERM_PROGRAM_VERSION <= 273)
   set t_ut=
endif

" Python specific stuff
if has('eval')
   let python_highlight_all = 1
   let python_slow_sync = 1
endif

" ---- OmniCpp ----
if v:version >= 700
   if has('autocmd')
      autocmd InsertLeave * if pumvisible() == 0|pclose|endif
   endif

   set completeopt=menu,menuone,longest

   let OmniCpp_MayCompleteDot = 1 " autocomplete with .
   let OmniCpp_MayCompleteArrow = 1 " autocomplete with ->
   let OmniCpp_MayCompleteScope = 1 " autocomplete with ::
   let OmniCpp_SelectFirstItem = 2 " select first item (but don't insert)
   let OmniCpp_NamespaceSearch = 2 " search namespaces in this and included files
   let OmniCpp_ShowPrototypeInAbbr = 1 " show function prototype (i.e. parameters) in popup window
   map <C-F12> :!$HOME/bin/ctags -R --c++-kinds=+p --fields=+iaS --extra=+q .<CR><CR>
   " add current directory's generated tags file to available tags
   set tags+=./tags
endif

set t_RV=
nnoremap <F2> :set invpaste paste?<CR>
set pastetoggle=<F2>
set showmode


" ex command for toggling hex mode - define mapping if desired
command -bar Hexmode call ToggleHex()

" helper function to toggle hex mode
function ToggleHex()
  " hex mode should be considered a read-only operation
  " save values for modified and read-only for restoration later,
  " and clear the read-only flag for now
  let l:modified=&mod
  let l:oldreadonly=&readonly
  let &readonly=0
  let l:oldmodifiable=&modifiable
  let &modifiable=1
  if !exists("b:editHex") || !b:editHex
    " save old options
    let b:oldft=&ft
    let b:oldbin=&bin
    " set new options
    setlocal binary " make sure it overrides any textwidth, etc.
    let &ft="xxd"
    " set status
    let b:editHex=1
    " switch to hex editor
    %!xxd
  else
    " restore old options
    let &ft=b:oldft
    if !b:oldbin
      setlocal nobinary
    endif
    " set status
    let b:editHex=0
    " return to normal editing
    %!xxd -r
  endif
  " restore values for modified and read only state
  let &mod=l:modified
  let &readonly=l:oldreadonly
  let &modifiable=l:oldmodifiable
endfunction


highlight ColorColumn ctermbg=1
highlight ColorColumn guibg=Red