" Vim Plugin:	Edit the file with an existing Vim if possible" Maintainer:	Bram Moolenaar" Last Change:	2007 Mar 17 " This is a plugin, drop it in your (Unix) ~/.vim/plugin or (Win32)" $VIM/vimfiles/plugin directory.  Or make a symbolic link, so that you" automatically use the latest version. " This plugin serves two purposes:" 1. On startup, if we were invoked with one file name argument and the file"    is not modified then try to find another Vim instance that is editing"    this file.  If there is one then bring it to the foreground and exit." 2. When a file is edited and a swap file exists for it, try finding that"    other Vim and bring it to the foreground.  Requires Vim 7, because it"    uses the SwapExists autocommand event. " Function that finds the Vim instance that is editing "filename" and brings" it to the foreground.func s:EditElsewhere(filename)  let fname_esc = substitute(a:filename, "'", "''", "g")   let servers = serverlist()  while servers != ''    " Get next server name in "servername"; remove it from "servers".    let i = match(servers, "\n")    if i == -1      let servername = servers      let servers = ''    else      let servername = strpart(servers, 0, i)      let servers = strpart(servers, i + 1)    endif     " Skip ourselves.    if servername ==? v:servername      continue    endif     " Check if this server is editing our file.    if remote_expr(servername, "bufloaded('" . fname_esc . "')")      " Yes, bring it to the foreground.      if has("win32")	call remote_foreground(servername)      endif      call remote_expr(servername, "foreground()")       if remote_expr(servername, "exists('*EditExisting')")	" Make sure the file is visible in a window (not hidden).	" If v:swapcommand exists and is set, send it to the server.	if exists("v:swapcommand")	  let c = substitute(v:swapcommand, "'", "''", "g")	  call remote_expr(servername, "EditExisting('" . fname_esc . "', '" . c . "')")	else	  call remote_expr(servername, "EditExisting('" . fname_esc . "', '')")	endif      endif       if !(has('vim_starting') && has('gui_running') && has('gui_win32'))	" Tell the user what is happening.  Not when the GUI is starting	" though, it would result in a message box.	echomsg "File is being edited by " . servername	sleep 2      endif      return 'q'    endif  endwhile  return ''endfunc " When the plugin is loaded and there is one file name argument: Find another" Vim server that is editing this file right now.if argc() == 1 && !&modified  if s:EditElsewhere(expand("%:p")) == 'q'    quit  endifendif " Setup for handling the situation that an existing swap file is found.try  au! SwapExists * let v:swapchoice = s:EditElsewhere(expand("<afile>:p"))catch  " Without SwapExists we don't do anything for ":edit" commandsendtry " Function used on the server to make the file visible and possibly execute a" command.func! EditExisting(fname, command)  " Get the window number of the file in the current tab page.  let winnr = bufwinnr(a:fname)  if winnr <= 0    " Not found, look in other tab pages.    let bufnr = bufnr(a:fname)    for i in range(tabpagenr('$'))      if index(tabpagebuflist(i + 1), bufnr) >= 0	" Make this tab page the current one and find the window number.	exe 'tabnext ' . (i + 1)	let winnr = bufwinnr(a:fname)	break;      endif    endfor  endif   if winnr > 0    exe winnr . "wincmd w"  else    exe "split " . escape(a:fname, ' #%"|')  endif   if a:command != ''    exe "normal " . a:command  endif   redrawendfunc