On 2012-03-07, Guido Van Hoecke wrote:
> Hi,
>
> I have this simple GuivhoFoldText function:
>
> function! GuivhoFoldText() " show text b4 marker and count
> return getline(v:foldstart) . ' ⋯' . (v:foldend - v:foldstart
> + 1) . '⋯ '
> endfunction
>
> As apparent from the code, I want the complete text before the marker to
> be shown, followed by the number of folded lines.
>
> The important issue is that the displayed text should keep the original
> indentation whitespace so that its folded text would start on the column
> where it starts in the unfolded state.
>
> This works well if the file formatting matches the current smarttab,
> smartindent, softtabstop etc settings.
>
> For a file that has leading tabs although it is supposed not to use tabs
> but spaces, this foldtext expression fails. It returns one single space
> for each leading tab, rather than either the leading whitespace
> verbatim or the leading text where the leading tabs are replaced by
> &softtabstop spaces (4 in casu).
>
> As soon as I issue ':retab' the foldtext expression works as desired.
> But I do not own this file, so it would be unpolite to the owner to
> return his/her file with whitespace changes all over...
>
> Anybody has any suggestion how my foldtext function can be ameliorated
> so that it also works without performing a :retab?
You can replace "getline(v:foldstart)" with this:
repeat(' ', indent(v:foldstart)) . matchstr(getline(v:foldstart), '\S')
That will replace the leading whitespace of the current line with
enough spaces to achieve the same indentation.
That is untested, but is derived from my own foldtext(), so if it is
not exactly correct, it shouldn't be off by much.
Regards,
Gary
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