Get "usable" window width in vim script
How do I get the width of 3 (marked with green color in the image) in vim script?
If there is no signs column, and there are no other "special columns", I can get it with
winwidth(0) - (max([len(line('$')), &numberwidth-1]) + 1)
Solution
I think, you should be able to get that width using:
:set virtualedit=all
:norm! g$
:echo virtcol('.')
Alternatively, you could check, whether a signcolumn is present (e.g. using redir)
:redir =>a |exe "sil sign place buffer=".bufnr('')|redir end
:let signlist=split(a, '\n')
:let width=winwidth(0) - ((&number||&relativenumber) ? &numberwidth : 0) - &foldcolumn - (len(signlist) > 1 ? 2 : 0)
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