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Re: Unable to set 'display text property, but can set other props


From: Eli Zaretskii
Subject: Re: Unable to set 'display text property, but can set other props
Date: Fri, 11 Sep 2020 21:34:38 +0300

> From: Göktuğ Kayaalp <self@gkayaalp.com>
> Date: Fri, 11 Sep 2020 20:35:40 +0300
> 
> What I’m trying to do is to expand one space character enough to align
> the text following the character on the same line to the right edge of
> the window.
> 
> Problem is, while I can set properties like 'help-echo on the region, I
> can’t set 'display.  I’ve tried variations of the below with `(space
> . (:width ...)) too.
> 
> Maths is probably somewhat off, but the actual problem is that I can’t
> set any 'display props, e.g. ‘STRING’ too.
> 
> I’ve tried just using things akin to
> 
> (put-text-property 67 68 'display '(space-width 10))
> 
> using M-:.
> 
> Why is this happening? Am I doing something very obviously wrong?  Or
> is it something else?

The character at buffer position where you put this property must be a
SPC character.



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