Copy and paste issue with Mac OS X

When I copy a text from a browser and paste it into a file I opened using vi in Terminal, I get the following unformatted text. Why does vi or the Terminal ignoring the newlines?

Instead of getting the following:

" Restore cursor position to where it was before
augroup JumpCursorOnEdit
   au!
   autocmd BufReadPost *
            \ if expand("<afile>:p:h") !=? $TEMP |
            \   if line("'\"") > 1 && line("'\"") <= line("$") |
            \     let JumpCursorOnEdit_foo = line("'\"") |
            \     let b:doopenfold = 1开发者_运维百科 |
            \     if (foldlevel(JumpCursorOnEdit_foo) > foldlevel(JumpCursorOnEdit_foo - 1)) |
            \        let JumpCursorOnEdit_foo = JumpCursorO

I get this:

" Restore cursor position to where it was before
augroup JumpCursorOnEdit
   au!
      autocmd BufReadPost *
                  \ if expand("<afile>:p:h") !=? $TEMP |
                              \   if line("'\"") > 1 && line("'\"") <= line("$") |
                                          \     let JumpCursorOnEdit_foo = line("'\"") |
                                                      \     let b:doopenfold = 1 |
                                                                  \     if (foldlevel(JumpCursorOnEdit_foo) > foldlevel(JumpCursorOnEdit_foo - 1)) |

This is the fault of vi, not Mac OS X or Terminal. Vi isn't ignoring the newlines; it's just accumulating indentation. You can fix this by turning autoindent off (:set noai) before pasting and turning it back on afterwards, or, if you're using Vim (which I believe vi is just a symlink to in Mac OS X) you can temporarily turn the paste option on, which disables autoindent along with several other features that can cause problems when pasting text.

Even better than :set paste is to just us the mac clipboard.

If you're using vim 7.3, you can add this to your ~/.vimrc file to get yank (y) and paste (p) to use the Mac`s cut and paste buffer:

if has("macunix")
  if v:version >= 703
    " Default yank and paste go to Mac's clipboard
    set clipboard=unnamed
  endif
endif

You can safely put it in your .vimrc even if you don't have Vim 7.3 -- it just won't work.

You can get the latest vim using homebrew and the homebrew-alt repositories. I recommend it!