Question

我已经为 Markdown 实现了一个非常简单的折叠表达式，但由于某些原因它并没有起作用。我已经在echom函数中插入了一些FoldExpr消息，我可以在消息中看到它们并且它们是正确的。所以似乎应用了，但没有折叠。除了我将foldlevel设置为零之外，zM也没有效果。

有人看到失败吗？

ftplugin/markdown_fold.vim :

" Generate the folds text for the `foldtext` option.
" Simply use the first line (which should contain the header)
" and extend it by the number of lines in this section.
"
function! FoldText()
  let l:title = getline(v:foldstart)
  let l:line_count = (v:foldend - v:foldstart)
  let l:line_text = l:line_count > 1 ? 'lines' : 'line'
  let l:text = l:title . ' [' . l:line_count . ' ' . l:line_text . ']'
  return l:text
endfunction

" Return the fold level for the `foldexpr` option.
" Checks if the current line is a header.
" The level is equal to the number of hashes of the header.
" All lines which are not a header have the same level as their predecessor.
"
function! FoldExpr()
  let l:line = getline(v:lnum)
  let l:count = len(matchstr(l:line, '^#\+'))

  if l:count > 0
    return '>0'
  else
    return '='
  endif
endfunction


" Use custom fold expression and text.
setlocal foldmethod=expr
setlocal foldexpr=FoldExpr()
setlocal foldtext=FoldText()

" Fold everything per default.
setlocal foldlevel=0
setlocal foldminlines=0

Answer 1

>0没有意义。不幸的是，Vim毫无保留地接受了它。根据{{3}}，0的折叠值表示该行未折叠。要开始一级折叠，请返回>1。

Vim折叠表达不起作用

1 个答案: