vim-preserve.vim

" My solution to reident, remove duplicated blank lines and things like that
" envoles the function Preserve(), it allows me doing a lot of stuff withou moving
" my cursor or messing up with my jumps and search registers

" Utility function that save last search and cursor position
" http://technotales.wordpress.com/2010/03/31/preserve-a-vim-function-that-keeps-your-state/
" video from vimcasts.org: http://vimcasts.org/episodes/tidying-whitespace
" using 'execute' command doesn't overwrite the last search pattern, so I
" don't need to store and restore it.
" preserve function
if !exists('*Preserve')
    function! Preserve(command) range
        try
            let l:win_view = winsaveview()
             silent! keepjumps keeppatterns execute a:command
        finally
            call winrestview(l:win_view)
        endtry
    endfunction
endif

" remove consecutive blank lines
" see Preserve function definition
fun! DelBlankLines() range
    if !&binary && &filetype != 'diff'
        call Preserve(':%s/\s\+$//e')
        call Preserve(':%s/^\n\{2,}/\r/ge')
    endif
endfun

command! -nargs=0 DelBlank :call DelBlankLines()
nnoremap <Leader>d :call DelBlankLines()<cr>