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Re: Fill column indicator functionality

From: Ergus
Subject: Re: Fill column indicator functionality
Date: Fri, 5 Apr 2019 12:36:14 +0200
User-agent: NeoMutt/20180716

On Fri, Apr 05, 2019 at 11:10:15AM +0200, Robert Pluim wrote:
On Wed, 03 Apr 2019 14:11:00 +0300, Eli Zaretskii <address@hidden> said:

   Eli> The changes you made look fine to me.  Let's wait for more
   Eli> people to try the branch.

Iʼve just tried it.

- etc/NEWS says:

   Customize the buffer-local variables 'display-fill-column-indicator'

but M-x customize-variable doesnʼt know about


Sorry, I forgot to add it to cus-start.el I fixed right now. Ween I set
the variable with set-variable it works for me. (and redisplay is called)

The problem now is that I added it to cus-start.el but when I set it
with the interface, the line does not change at all. Nothing really
happens when I save.

Could anyone tell me what I am missing here please??

- the manual talks about 'global-display-fill-column-indicator-mode', but
M-x doesnʼt  know about that function until I
   (require 'display-fill-column-indicator)
(this may be due to the way autoloads work in emacs. Thereʼs an entry
in ldefs-boot.el for it)

I have it without the require, so maybe when generating the autoload
(which seems to be an automatic process) it will appear.
- the Commentary section in display-fill-column-indicator.el still
talks about line numbers, and appears truncated.

Fixed, thanks!

- when I turn it on, it chooses \u2502, which is not displayable by my
default font, but is displayable by a fallback font. I end up with
empty blocks at the end of each line. I can probably customize
'fill-column-face' to work around this, but Iʼd expect this to work by
default (either by using '|' or using the fallback font).

I don't really find a right method to fix this because the
char-displayable-p function seems not to be accurate in many
cases. There was a discussion about this before, but there was not a
final agreement I think. And from the char-displayable-p documentation:

On a multi-font display, the test is only whether there is an
appropriate font from the selected frame's fontset to display
CHAR's charset in general.  Since fonts may be specified on a
per-character basis, this may not be accurate.

Any suggestion here?

- in org-mode buffers the indicator is displayed as '['. This may be
related to the previous point (those buffers use yet a third font).



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