Tony Mechelynck wrote:
> Bug or feature? Unlike all other "window numbers" (count for Ctrl-W w,
> return value from winnr() or tabpagewinnr(), etc.) which are 1-based
> (top window is 1), v:beval_winnr is zero-based (top window is 0), as can
> be ascertained with the following setting (in a Vim compiled with
> +balloon_eval, of course):
>
> :set beval bexpr='buf:'.v:beval_bufnr.'\ win:'.v:beval_winnr.'\
> loc:'.v:beval_lnum.','.v:beval_col.'\ text:'.v:beval_text
>
> Then hovering the mouse over text being edited shows that "win:" is
> followed by a value one less than the current winnr(). AFAICT, this
> inconsistency is not documented (if it is, I couldn't find it).
Yeah, this is unexpected. However, changing it now will cause more
problems. I'll add a note in the documentation.
> Also, with the same settings, one sees that v:beval_col is not a
> "virtual column" (screen column) but a "byte offset from start-of-line".
> For instance, hard tabs are counted as one "column" each regardless of
> their actual displayed width.
That's to be expected and already documented.
> Since making v:beval_winnr one-based or v:beval_col "virtual" might
> break compatibility, I propose to leave the current behaviour unchanged,
> but to document it.
>
> For the record, I did this test with gvim 7.3.118 (Huge version with
> GTK2-GNOME GUI) running in GUI mode. AFAICT the ballon-eval feaure is
> not available in Console mode (no error, just no balloon).
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