How to change window divider in text terminal?

How to change window divider in text terminal?

[Akib Azmain Turja]

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From (elisp) Display Tables:

--8<---------------cut here---------------start------------->8---
   The ordinary elements of the display table are indexed by character
codes; the element at index C says how to display the character code C.
The value should be ‘nil’ (which means to display the character C
according to the usual display conventions; *note Usual Display::), or a
vector of glyph codes (which means to display the character C as those
glyphs; *note Glyphs::).

[...]

   The display table also has six “extra slots” which serve special
purposes.  Here is a table of their meanings; ‘nil’ in any slot means to
use the default for that slot, as stated below.

[...]

5
     The glyph used to draw the border between side-by-side windows (the
     default is ‘|’).  *Note Splitting Windows::.  This currently has
     effect only on text terminals; on graphical terminals, if vertical
     scroll bars are supported and in use, a scroll bar separates the
     two windows, and if there are no vertical scroll bars and no
     dividers (*note Window Dividers::), Emacs uses a thin line to
     indicate the border.
--8<---------------cut here---------------end--------------->8---

But none of the following work for me:

--8<---------------cut here---------------start------------->8---
(set-display-table-slot standard-display-table 5 ?|)
(set-display-table-slot standard-display-table 5 (make-glyph-code ?|))
(set-display-table-slot standard-display-table 'vertical-border ?|)
(set-display-table-slot standard-display-table 'vertical-border
                        (make-glyph-code ?|))
--8<---------------cut here---------------end--------------->8---

And I'm pretty much sure that this happens because the character '|' is
hardcoded in "build_frame_matrix_from_leaf_window" in "src/dispnew.c".

-- 
Akib Azmain Turja

Find me on Mastodon at @akib@hostux.social.

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Re: How to change window divider in text terminal?

[Andreas Schwab]

On Jul 28 2022, Akib Azmain Turja wrote:

> But none of the following work for me:
>
> (set-display-table-slot standard-display-table 5 ?|)
> (set-display-table-slot standard-display-table 5 (make-glyph-code ?|))
> (set-display-table-slot standard-display-table 'vertical-border ?|)
> (set-display-table-slot standard-display-table 'vertical-border
>                         (make-glyph-code ?|))

All of them work for me.  Of course, there is no difference since ?| is
also the default.

> And I'm pretty much sure that this happens because the character '|' is
> hardcoded in "build_frame_matrix_from_leaf_window" in "src/dispnew.c".

That's only used if the active display table doesn't override it.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."

Re: How to change window divider in text terminal?

[Akib Azmain Turja]

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Andreas Schwab <schwab@suse.de> writes:

> On Jul 28 2022, Akib Azmain Turja wrote:
>
>> But none of the following work for me:
>>
>> (set-display-table-slot standard-display-table 5 ?|)
>> (set-display-table-slot standard-display-table 5 (make-glyph-code ?|))
>> (set-display-table-slot standard-display-table 'vertical-border ?|)
>> (set-display-table-slot standard-display-table 'vertical-border
>>                         (make-glyph-code ?|))
>
> All of them work for me.  Of course, there is no difference since ?| is
> also the default.
>
>> And I'm pretty much sure that this happens because the character '|' is
>> hardcoded in "build_frame_matrix_from_leaf_window" in "src/dispnew.c".
>
> That's only used if the active display table doesn't override it.

Ah, my bad.  I typed '|' instead of '│'.  Anyway, thanks for finding my
mistake.

-- 
Akib Azmain Turja

Find me on Mastodon at @akib@hostux.social.

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