Y. Hida wrote:
> Is there a way figure out how wide a string containing double-width
> characters are when displayed? I'm trying to right-justify some strings
> in foldtext.
/\%v pattern is useful for it.
function! StrWidth(str, ...)
let vcol = get(a:000, 0, 0)
let w = 0
for c in split(a:str, '\zs')
let w += CharWidth(c, w + vcol)
endfor
return w
endfunction
function! CharWidth(c, ...)
let vcol = get(a:000, 0, 0)
if a:c == ""
return 0
elseif a:c == "\t"
return TabWidth(vcol)
elseif a:c =~ '^.\%2v' " single char
return 1
elseif a:c =~ '^.\%3v' " double char, ^X
return 2
elseif a:c =~ '^.\%5v' " <XX>
return 4
else " other?
endif
return 0
endfunction
function! TabWidth(vcol)
return &tabstop - (a:vcol % &tabstop)
endfunction
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