对winmanager插件的小改进

vim最新版的winmanager插件可以通过winfileexplorer执行外部程序，例如可以光标选中一个mp3文件，然后shift+s就可以通过系统默认程序打开这个mp3文件，但是只是对Windows有效，Linux下无效，根本原因是winfileexplorer中用的是Windows下的start命令，而Linux下我们要用xdg-open命令，所以只需要在winfileexplorer.vim中添加一行即可，如下加粗所示：

"---
" Open file or directory with the corresponding application
" associated by the shell
"
function! s:ShellExecute()
  " Are we on a line with a file name?
  let l = getline(".")
  if l =~ '^"'
    return
  endif

  " Copy window settings to script settings
  let s:sortby=w:sortdirlabel . w:sorttype
  let s:longhelp = w:longhelp
  let s:longlist = w:longlist

  " Get the file name
  let fn=s:GetFullFileName()

  if (has("win32"))
    exec "silent ! start \"\" \"".substitute(fn, "/", "\\", "g")."\""
 

elseif (has("unix")) exec "silent !xdg-open \'".fn."\'"

else if (exists("g:netrw_browsex_viewer")) exec "silent !" . g:netrw_browsex_viewer . " \'".fn."\'" else exec "silent !start \'".fn."\'" endif endif endfunction

另外还发现一个小bug，就是在winmanager窗口和编辑窗口之间用鼠标来回点击时，编辑窗口会莫名其妙地跳行，后来研究发现，原版代码中就有解决办法，只不过注释起来了,找到下面代码：

augroup WinManagerRefresh
        au!
        " Thomas Regner <regner.dievision.de> suggested i use the following
        " autocmds instead, to automatically skip refreshing on [No Files] and
        " such...
        "au BufEnter ^[^\[]* call <SID>RefreshWinManager()
        "au BufDelete ^[^\[]* call <SID>RefreshWinManager("BufDelete")
        au BufEnter * call <SID>RefreshWinManager()
        au BufDelete * call <SID>RefreshWinManager("BufDelete")
    augroup END
换成：
augroup WinManagerRefresh
        au!
        " Thomas Regner <regner.dievision.de> suggested i use the following
        " autocmds instead, to automatically skip refreshing on [No Files] and
        " such...
        au BufEnter ^[^\[]* call <SID>RefreshWinManager()
        au BufDelete ^[^\[]* call <SID>RefreshWinManager("BufDelete")
        "au BufEnter * call <SID>RefreshWinManager()
        "au BufDelete * call <SID>RefreshWinManager("BufDelete")
    augroup END