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Re: line-start?
From: |
Eli Zaretskii |
Subject: |
Re: line-start? |
Date: |
Fri, 07 Feb 2020 12:24:37 +0200 |
> From: Bastien <address@hidden>
> Cc: address@hidden
> Date: Fri, 07 Feb 2020 11:11:15 +0100
>
> Eli Zaretskii <address@hidden> writes:
>
> > Once again, window-hscroll just returns the number of columns by which
> > the window is hscrolled, it doesn't return the buffer position. For
> > example, window-hscroll will return the same value for each line in
> > the window, although the buffer position of the beginning of each line
> > is different. Are you looking for columns or for buffer positions?
>
> I was looking for columns.
Then (nth 1) of what posn-at-x-y returns is not what you want. You
should use the (car (nth 6)) instead.
> The use case was this one: given a line, display the content of this
> line in the header line. When horizontally scrolled, the header has
> to display a substring of the line under the cursor, something like
> (substring (current-line-string) offset-in-columns).
But using the buffer position, you could use buffer-substring instead,
right?
> (defun window-line-start (&optional pos window)
> "Return the position of the visual start of the line.
> POS defaults to point in WINDOW; WINDOW defaults to the current window."
> (nth 1 (posn-at-x-y
> 0 (+ (cdr (posn-x-y (posn-at-point pos window)))
> (- (nth 1 (window-edges nil t nil t))
> (nth 1 (window-edges nil nil nil t)))))))
>
> My use-case is gone, I went with overlays instead of the header line.
>
> But I guess `window-line-start' could perhaps be useful to others.
Maybe.
- line-start?, Bastien, 2020/02/06
- Re: line-start?, Bastien, 2020/02/06
- Re: line-start?, Eli Zaretskii, 2020/02/06
- Re: line-start?, Bastien, 2020/02/07
- Re: line-start?, Eli Zaretskii, 2020/02/07
- Re: line-start?, Bastien, 2020/02/07
- Re: line-start?,
Eli Zaretskii <=
- Re: line-start?, Bastien, 2020/02/07
- Re: line-start?, Eli Zaretskii, 2020/02/07
- Re: line-start?, Bastien, 2020/02/07
- Re: line-start?, Eli Zaretskii, 2020/02/07
- Re: line-start?, Bastien, 2020/02/07