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Re: Getting column position accounting for overlays
From: |
Eli Zaretskii |
Subject: |
Re: Getting column position accounting for overlays |
Date: |
Wed, 05 Aug 2015 18:21:05 +0300 |
> From: Yuri D'Elia <address@hidden>
> Date: Wed, 5 Aug 2015 11:10:59 +0200
>
> I'd like the equivalent of (current-column), or character length between
> (beginning-of-line) and cursor position [modulus tabs], but using the
> actual displayed overlays.
I think you want this:
(/ (car (window-text-pixel-size nil (line-beginning-position) (point)))
(default-font-width))
But that's a guess. Please tell more about your use case, because I
don't quite understand why would you need this. Also note that
default-font-width didn't exist before Emacs 25.
> I would almost have expected something to extract the visualized string
> between two points, like `buffer-substring' but iterating through
> overlays; but couldn't find any (did I miss it?)
The overlay strings are directly accessible via 'overlay-get', so why
would anyone need the feature you expected to exist?
> (posn-col-row (posn-at-point)) "would" work, but 1) seems inefficient,
> especially considering I don't care about variable-pitch fonts and 2)
> doesn't work if the point is not visible.
If you don't care about variable-pitch fonts, how come you do care
about overlay and display strings? They are conceptually the same:
they extend the width of the text by using data that is not directly
available from buffer text.
- Getting column position accounting for overlays, Yuri D'Elia, 2015/08/04
- Re: Getting column position accounting for overlays, Eli Zaretskii, 2015/08/04
- Re: Getting column position accounting for overlays, Yuri D'Elia, 2015/08/05
- Re: Getting column position accounting for overlays,
Eli Zaretskii <=
- Re: Getting column position accounting for overlays, Yuri D'Elia, 2015/08/05
- Re: Getting column position accounting for overlays, Eli Zaretskii, 2015/08/05
- Re: Getting column position accounting for overlays, Yuri D'Elia, 2015/08/07
- Re: Getting column position accounting for overlays, Eli Zaretskii, 2015/08/07
- Re: Getting column position accounting for overlays, Yuri D'Elia, 2015/08/08
- Re: Getting column position accounting for overlays, Eli Zaretskii, 2015/08/08
- Re: Getting column position accounting for overlays, Yuri D'Elia, 2015/08/08
- Re: Getting column position accounting for overlays, Eli Zaretskii, 2015/08/08
- Re: Getting column position accounting for overlays, Yuri D'Elia, 2015/08/08
- Re: Getting column position accounting for overlays, Eli Zaretskii, 2015/08/08