GNU bug report logs - #59065
28.2; Mapping default face affects extended faces

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Al Haji-Ali <abdo.haji.ali <at> gmail.com>
Subject: bug#59065: closed (Re: bug#59065: 28.2; Mapping default face
 affects extended faces)
Date: Sat, 12 Nov 2022 12:45:02 +0000

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Your bug report

#59065: 28.2; Mapping default face affects extended faces

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 59065 <at> debbugs.gnu.org.

-- 
59065: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=59065
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Eli Zaretskii <eliz <at> gnu.org>
To: abdo.haji.ali <at> gmail.com
Cc: 59065-done <at> debbugs.gnu.org
Subject: Re: bug#59065: 28.2; Mapping default face affects extended faces
Date: Sat, 12 Nov 2022 14:44:38 +0200

> Cc: 59065 <at> debbugs.gnu.org
> Date: Sun, 06 Nov 2022 11:34:51 +0200
> From: Eli Zaretskii <eliz <at> gnu.org>
> 
> > From: Al Haji-Ali <abdo.haji.ali <at> gmail.com>
> > Date: Sun, 06 Nov 2022 01:13:23 +0000
> > 
> > 0. Run `emacs -Q`
> > 
> > 1. Create a buffer with this content and ensure `org-mode` is on
> > ------------------------------------------------------------
> > * One
> > #+begin_src emacs-lisp
> > #+end_src
> > * Two
> > #+begin_src emacs-lisp
> > #+end_src
> > ------------------------------------------------------------
> > 
> > 2. Call `org-narrow-to-subtree` on "One".
> > 
> > 3. Change the face `org-block-end-line` to have an extended background on the end-line of the org-block
> > 
> > (set-face-attribute
> >    'org-block-end-line nil
> >    :extend t
> >    :background "#4e5079")
> > 
> > 4. Create a any font remap like this trivial one
> > 
> > (face-remap-add-relative 'default 'default)
> > 
> > or even this one
> > 
> > (face-remap-add-relative
> >         'default
> >         '(:filtered (:window not-real-filter t) not-real-face)
> > 
> > 5. Notice how the background colour on the last line of the narrowed buffer extends over the whole window instead of just the line.
> 
> Thanks, should be fixed now (on the master branch).

No further comments, so I will assume the bug is indeed fixed, and
close the bug as fixed.

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From: Al Haji-Ali <abdo.haji.ali <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.2; Mapping default face affects extended faces
Date: Sun, 06 Nov 2022 01:13:23 +0000

I'll admit this "bug" is a convoluted one. I am noticing a weird behaviour where extended background colour to the whole window instead of a single line when a face a remapped.

To re-produce an example:

0. Run `emacs -Q`

1. Create a buffer with this content and ensure `org-mode` is on
------------------------------------------------------------
* One
#+begin_src emacs-lisp
#+end_src
* Two
#+begin_src emacs-lisp
#+end_src
------------------------------------------------------------

2. Call `org-narrow-to-subtree` on "One".

3. Change the face `org-block-end-line` to have an extended background on the end-line of the org-block

(set-face-attribute
   'org-block-end-line nil
   :extend t
   :background "#4e5079")

4. Create a any font remap like this trivial one

(face-remap-add-relative 'default 'default)

or even this one

(face-remap-add-relative
        'default
        '(:filtered (:window not-real-filter t) not-real-face)

5. Notice how the background colour on the last line of the narrowed buffer extends over the whole window instead of just the line.

Best regards,
-- Al

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