120 lines
3.6 KiB
VimL
120 lines
3.6 KiB
VimL
" Vim Plugin: Edit the file with an existing Vim if possible
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" Maintainer: The Vim Project <https://github.com/vim/vim>
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" Last Change: 2023 Aug 13
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" This is a plugin, drop it in your (Unix) ~/.vim/plugin or (Win32)
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" $VIM/vimfiles/plugin directory. Or make a symbolic link, so that you
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" automatically use the latest version.
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" This plugin serves two purposes:
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" 1. On startup, if we were invoked with one file name argument and the file
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" is not modified then try to find another Vim instance that is editing
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" this file. If there is one then bring it to the foreground and exit.
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" 2. When a file is edited and a swap file exists for it, try finding that
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" other Vim and bring it to the foreground. Requires Vim 7, because it
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" uses the SwapExists autocommand event.
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if v:version < 700
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finish
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endif
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" Function that finds the Vim instance that is editing "filename" and brings
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" it to the foreground.
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func s:EditElsewhere(filename)
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let fname_esc = substitute(a:filename, "'", "''", "g")
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let servers = serverlist()
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while servers != ''
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" Get next server name in "servername"; remove it from "servers".
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let i = match(servers, "\n")
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if i == -1
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let servername = servers
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let servers = ''
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else
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let servername = strpart(servers, 0, i)
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let servers = strpart(servers, i + 1)
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endif
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" Skip ourselves.
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if servername ==? v:servername
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continue
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endif
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" Check if this server is editing our file.
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if remote_expr(servername, "bufloaded('" . fname_esc . "')")
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" Yes, bring it to the foreground.
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if has("win32")
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call remote_foreground(servername)
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endif
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call remote_expr(servername, "foreground()")
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if remote_expr(servername, "exists('*EditExisting')")
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" Make sure the file is visible in a window (not hidden).
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" If v:swapcommand exists and is set, send it to the server.
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if exists("v:swapcommand")
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let c = substitute(v:swapcommand, "'", "''", "g")
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call remote_expr(servername, "EditExisting('" . fname_esc . "', '" . c . "')")
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else
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call remote_expr(servername, "EditExisting('" . fname_esc . "', '')")
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endif
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endif
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if !(has('vim_starting') && has('gui_running') && has('gui_win32'))
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" Tell the user what is happening. Not when the GUI is starting
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" though, it would result in a message box.
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echomsg "File is being edited by " . servername
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sleep 2
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endif
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return 'q'
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endif
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endwhile
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return ''
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endfunc
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" When the plugin is loaded and there is one file name argument: Find another
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" Vim server that is editing this file right now.
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if argc() == 1 && !&modified
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if s:EditElsewhere(expand("%:p")) == 'q'
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quit
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endif
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endif
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" Setup for handling the situation that an existing swap file is found.
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try
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au! SwapExists * let v:swapchoice = s:EditElsewhere(expand("<afile>:p"))
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catch
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" Without SwapExists we don't do anything for ":edit" commands
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endtry
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" Function used on the server to make the file visible and possibly execute a
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" command.
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func! EditExisting(fname, command)
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" Get the window number of the file in the current tab page.
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let winnr = bufwinnr(a:fname)
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if winnr <= 0
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" Not found, look in other tab pages.
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let bufnr = bufnr(a:fname)
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for i in range(tabpagenr('$'))
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if index(tabpagebuflist(i + 1), bufnr) >= 0
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" Make this tab page the current one and find the window number.
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exe 'tabnext ' . (i + 1)
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let winnr = bufwinnr(a:fname)
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break
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endif
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endfor
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endif
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if winnr > 0
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exe winnr . "wincmd w"
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elseif exists('*fnameescape')
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exe "split " . fnameescape(a:fname)
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else
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exe "split " . escape(a:fname, " \t\n*?[{`$\\%#'\"|!<")
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endif
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if a:command != ''
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exe "normal! " . a:command
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endif
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redraw
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endfunc
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