" Delete buffer while keeping window layout (don't close buffer's windows).
" Version 2008-11-18 from http://vim.wikia.com/wiki/VimTip165
if v:version < 700 || exists('loaded_bclose') || &cp
	finish
endif
let loaded_bclose = 1
if !exists('bclose_multiple')
	let bclose_multiple = 1
endif

" Display an error message.
function! s:Warn(msg)
	echohl ErrorMsg
	echomsg a:msg
	echohl NONE
endfunction

" Command ':Bclose' executes ':bd' to delete buffer in current window.
" The window will show the alternate buffer (Ctrl-^) if it exists,
" or the previous buffer (:bp), or a blank buffer if no previous.
" Command ':Bclose!' is the same, but executes ':bd!' (discard changes).
" An optional argument can specify which buffer to close (name or number).
function! s:Bclose(bang, buffer)
	if empty(a:buffer)
		let btarget = bufnr('%')
	elseif a:buffer =~ '^\d\+$'
		let btarget = bufnr(str2nr(a:buffer))
	else
		let btarget = bufnr(a:buffer)
	endif
	if btarget < 0
		call 'bdelete'.a:bang
		call s:Warn('No matching buffer for '.a:buffer)
		return
	endif
	if empty(a:bang) && getbufvar(btarget, '&modified')
		call s:Warn('No write since last change for buffer '.btarget.' (use :Bclose!)')
		return
	endif
	" Numbers of windows that view target buffer which we will delete.
	let wnums = filter(range(1, winnr('$')), 'winbufnr(v:val) == btarget')
	if !g:bclose_multiple && len(wnums) > 1
		call s:Warn('Buffer is in multiple windows (use ":let bclose_multiple=1")')
		return
	endif
	let wcurrent = winnr()
	for w in wnums
		execute w.'wincmd w'
		let prevbuf = bufnr('#')
		if prevbuf > 0 && buflisted(prevbuf) && prevbuf != w
			buffer #
		else
			bprevious
		endif
		if btarget == bufnr('%')
			" Numbers of listed buffers which are not the target to be deleted.
			let blisted = filter(range(1, bufnr('$')), 'buflisted(v:val) && v:val != btarget')
			" Listed, not target, and not displayed.
			let bhidden = filter(copy(blisted), 'bufwinnr(v:val) < 0')
			" Take the first buffer, if any (could be more intelligent).
			let bjump = (bhidden + blisted + [-1])[0]
			if bjump > 0
				execute 'buffer '.bjump
			else
				execute 'enew'.a:bang
			endif
		endif
	endfor
	execute 'bdelete'.a:bang.' '.btarget
	execute wcurrent.'wincmd w'
endfunction

command! -bang -complete=buffer -nargs=? Bclose call <SID>Bclose('<bang>', '<args>')
" command! -bang -complete=buffer -nargs=? bc call <SID>Bclose('<bang>', '<args>')
nnoremap <silent> <Leader>bd :Bclose<CR>
nnoremap <silent> <Leader>bD :Bclose!<CR>
nnoremap <silent> <Leader>BD :Bclose!<CR>