Re: detach current tab into a separate window

2016-01-14 18:05 GMT+03:00 Salman Halim <salmanhalim@gmail.com>:

On Thu, Jan 14, 2016 at 8:44 AM, Nikolay Aleksandrovich Pavlov <zyx.vim@gmail.com> wrote:

2016-01-14 8:23 GMT+03:00 kamaraju kusumanchi <raju.mailinglists@gmail.com>:

Is it possible to detach the current tab in a gvim session into a
separate gvim window? Something akin to what firefox can do with tabs?

Once the tab is separated, can I dock it back into the original gvim
window session?

​Firefox ​manages multiple X windows by one instance, and it was originally developed for graphical environment. Gvim has one process (and one instance) per one X window, doing no management of its windows. Vim originally developed for terminals and many GUI features are missing simply because they are not possible in terminal (though still there are such features, there are not much).

I would though ask why do you need this functionality in first place. I never had enough tabs open to want detaching, perhaps you are misusing this feature.

 

There is a macro in the runtime directory/macros called editexisting.vim which causes a file already being edited in another session of Vim to be brought to the foreground if you try to edit it again in another session. I modified it to, instead, close the other one and allow me to keep the new instance, instead. Perhaps you can modify it to do what you need. Note that I also use <S-F4> to copy the entire filepath of the current file to the system clipboard and <C-F4> to open the file currently on the current clipboard. So,

1. Go to the file you wish to detach and hit <S-F4>.
2. Go to the other Vim session (open one).
3. Hit <C-F4> to open it here and close the original.

The mappings and script (I use Windows exclusively so your mapping may need to be tweaked):

nmap <s-f4> :let @*=substitute(expand("%:p"), '/', '\\', 'g')<cr>:echo 'Copied "' . @* . '"'<cr>

nmap <c-f4> :execute 'sp ' . escape(@*, " ")<cr>

function! CloseBufferElsewhere( name )
  let filename = substitute( a:name, "'", "''", "g" )
  let servers  = split( serverlist(), "\n" )

  for server in servers
    if ( server ==? v:servername )
      continue
    endif

    if ( remote_expr( server, "bufloaded('" . filename . "')" ) )

​This should be using `string()`, *not* `"'" . filename "'"`.​

 

      " SALMAN: If multiple files by the same name are found, they will all be closed. Sometimes, two files with the same name but in different directories are found;
      " SALMAN: this should be addressed if it occurs too much.
      "
      " SALMAN: Last occurrence was on Tuesday, November 15, 2011.
      call remote_send( server, ":Closematching " . fnamemodify( filename, ":t" ) . "\<cr>" )

​And this should use `fnameescape()` and, probably, unknown additional hacks to make file names with newline inside work. Though actually depends on :Closematching definition, maybe it is incorrect in first place and `fnameescape()` will not help.

Why did not you simply use a function and remote_expr instead? This looks like there will be numerous problems than need solution:

1. Mode: what if server current mode is not normal mode?

2. Count: what if you have accidentally in server typed `2` before calling this command from remote?

3. Escaping: depends on the definition of the command.

4. Escaping 2: examples like

:echo remote_send("gvim", ":sleep 10 | echo ".

\ 'server2client(expand("<client>"), "HELLO")<CR>')

   in help suggest that file named `<CR>` will be interpreted as carriage return and not as literal `<CR>`. So there needs to be additional level of escaping.

 

      " If another server was found, it should've been closed and this file edited here now.
      return 'e'
    endif
  endfor

  " Ask the user what to do (a swap file exists, but no actual Vim instance was found).
  return ''
endfunction

augroup CloseBufferElsewhere
  au! SwapExists * let v:swapchoice = CloseBufferElsewhere( expand( "<afile>:p" ) )
augroup END

Hope this brings you closer,

Salman

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