Added support for tmux

plugin/bracketed-paste.vim

@@ -1,17 +1,27 @@
 " Code from:
 " http://stackoverflow.com/questions/5585129/pasting-code-into-terminal-window-into-vim-on-mac-os-x
+" then https://coderwall.com/p/if9mda
 " Docs on bracketed paste mode:
 " http://www.xfree86.org/current/ctlseqs.html
 if &term =~ "xterm.*" || &term =~ "screen*"
-  let &t_ti = &t_ti . "\e[?2004h"
-  let &t_te = "\e[?2004l" . &t_te
-  function! XTermPasteBegin(ret)
+  function! WrapForTmux(s)
+    if !exists('$TMUX')
+      return a:s
+    endif
+
+    let tmux_start = "\<Esc>Ptmux;"
+    let tmux_end = "\<Esc>\\"
+
+    return tmux_start . substitute(a:s, "\<Esc>", "\<Esc>\<Esc>", 'g') . tmux_end
+  endfunction
+
+  let &t_SI .= WrapForTmux("\<Esc>[?2004h")
+  let &t_EI .= WrapForTmux("\<Esc>[?2004l")
+
+  function! XTermPasteBegin()
     set pastetoggle=<Esc>[201~
     set paste
-    return a:ret
+    return ""
   endfunction
-  map <expr> <Esc>[200~ XTermPasteBegin("i")
-  imap <expr> <Esc>[200~ XTermPasteBegin("")
-  cmap <Esc>[200~ <nop>
-  cmap <Esc>[201~ <nop>
+  inoremap <special> <expr> <Esc>[200~ XTermPasteBegin()
 endif