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List:       vim
Subject:    Re: Automatically updating foldcolumn based on open folds
From:       Paul Jolly <paul () myitcv ! org ! uk>
Date:       2004-02-27 0:00:09
Message-ID: 403E8889.9020409 () myitcv ! org ! uk
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Paul Jolly wrote:

[...]

>>> function! FindFoldcolumn()
>>>  let pos = 1
>>>  let max_depth = 0
>>>  while pos < line("$")

The above line is obviously very inefficient (line("$") probably called 
in each loop unless Vim has some massively clever optimisation of line 
calls). Replace with:

let file_size = line("$")
while pos < file_size

>>>    let res = foldclosedend(pos)
>>>
>>>    " are we inside an open fold?
>>>    if res >= 0
>>>      " no. move just beyond the end of
>>>      " the fold
>>>      let pos = res + 1
>>>    else
>>>      " yes
>>>      let current_depth = foldlevel(pos)
>>>
>>>      " are we in the deepest fold yet?
>>>      if max_depth < current_depth
>>>        " yes
>>>        let max_depth = current_depth
>>>      endif
>>>      let pos = pos + 1
>>>    endif
>>>  endwhile
>>>  return max_depth
>>> endfunction

[...]


Paul
-- 
Department of Computing, Imperial College London
http://myitcv.org.uk/
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