vim - 在预览窗口中打开新缓冲区时自动关闭占用 Vim 预览窗口的缓冲区

Question

我经常使用Unite.vim滚动浏览 Vim 中的文件列表。有时我会使用 Unite 的auto-preview功能在滚动浏览时在预览窗口中打开每个文件。如果我滚动浏览大量文件，这会给我留下一堆我不需要的打开缓冲区。在预览窗口中打开新缓冲区时，如何关闭当前占用预览窗口的缓冲区？

Answer 1

我可以通过查看 Unite 源代码、复制预览功能并直接在此功能上进行所需的修改以垂直打开预览窗口来解决此问题：

function! s:preview.func(candidate)
  let buflisted = buflisted(
        \ unite#util#escape_file_searching(
        \ a:candidate.action__path))
  if filereadable(a:candidate.action__path)
    " If execute this command, unite.vim will be affected by events.
    noautocmd silent execute 'vert pedit!'  " added vert
          \ fnameescape(a:candidate.action__path)
    call SetWidthToHalfScreen()  " added to resize preview window
    let prev_winnr = winnr('#')
    let winnr = winnr()
    wincmd P
    doautoall BufRead
    setlocal nomodified
    execute prev_winnr.'wincmd w'
    execute winnr.'wincmd w'
  endif
  if !buflisted
    call unite#add_previewed_buffer_list(
        \ bufnr(unite#util#escape_file_searching(
        \       a:candidate.action__path)))
  endif
endfunction
call unite#custom#action("openable", "preview", s:preview)
call unite#custom#action("file", "preview", s:preview)

function! SetWidthToHalfScreen()
  let diff = 100 - winwidth(winnr())
  exec "vert resize " . (diff > 0 ? '+' : '-') . abs(diff)
endfunction