My .vimrc file

.vimrc

call pathogen#infect()
call pathogen#helptags()

set colorcolumn=80
highlight OverLength ctermbg=red ctermfg=white guibg=#592929
match OverLength /\%81v.\+/

syntax enable
set background=dark
let g:solarized_termcolors = 256
let g:solarized_visibility = "high"
let g:solarized_contrast = "high"
colorscheme solarized

set autoindent
set pastetoggle=<C-p>
set grepprg=ack

let mapleader=","

noremap <F5> :CommandTFlush<CR>
nmap <silent> <Leader>n :NERDTreeToggle<CR>

if argc() == 0
"  autocmd vimenter * NERDTree
end

set wildignore+=tmp/**

set softtabstop=2
set shiftwidth=2
set tabstop=2
set expandtab

set ttimeoutlen=50

if &term =~ "xterm" || &term =~ "screen"
  let g:CommandTCancelMap     = ['<ESC>', '<C-c>']
  let g:CommandTSelectNextMap = ['<C-n>', '<C-j>', '<ESC>OB']
  let g:CommandTSelectPrevMap = ['<C-p>', '<C-k>', '<ESC>OA']
  let g:CommandTFlush         = ['<C-l>']
endif

fun! <SID>StripTrailingWhitespaces()
  let l = line(".")
  let c = col(".")
  %s/\s\+$//e
  call cursor(l, c)
endfun

function! Smart_TabComplete()
  let line = getline('.')                         " current line

  let substr = strpart(line, -1, col('.')+1)      " from the start of the current
                                                  " line to one character right
                                                  " of the cursor
  let substr = matchstr(substr, "[^ \t]*$")       " word till cursor
  if (strlen(substr)==0)                          " nothing to match on empty string
    return "\<tab>"
  endif
  let has_period = match(substr, '\.') != -1      " position of period, if any
  let has_slash = match(substr, '\/') != -1       " position of slash, if any
  if (!has_period && !has_slash)
    return "\<C-X>\<C-P>"                         " existing text matching
  elseif ( has_slash )
    return "\<C-X>\<C-F>"                         " file matching
  else
    return "\<C-X>\<C-O>"                         " plugin matching
  endif
endfunction

inoremap <tab> <c-r>=Smart_TabComplete()<CR>

autocmd FileType c,cpp,java,php,ruby,python autocmd BufWritePre <buffer> :call <SID>StripTrailingWhitespaces()