寻找如何以编程方式检测当前 Vim 缓冲区是否包含至少一个定义的折叠的建议?无论折叠是打开还是关闭。
如果当前缓冲区中定义了折叠,则尝试调用
mkview
only:
autocmd BufWrite ?* if fold_defined() | mkview | endif
function fold_defined()
???
endfunction
func! HasFold()
let v = winsaveview()
let fold = 0
for move in ['zj', 'zk']
sil exec 'keepjumps norm!' move
if foldlevel('.') > 0
let fold = 1
break
endif
endfor
call winrestview(v)
return fold
endfunc
根据perreal的建议,我确实为我的问题写了一个可能的解决方案:
" Detect presence of fold definition in the current buffer
function FoldDefined()
let result = 0
let save_cursor = getpos('.')
call cursor(1,1)
let scanline = line('.')
let lastline = line('$')
while scanline <= lastline
if foldlevel(scanline) > 0
let result = 1
break
endif
let scanline = scanline + 1
endwhile
call setpos('.', save_cursor)
return result
endfunction
function! FoldDefined()
return len(filter(range(1, line('$')), 'foldlevel(v:val)>1'))>0
endfunction