GNU logs - #71829, boring messages

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Subject: bug#71829: 31.0.50; face-remap does not work with cursor
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Date: Fri, 28 Jun 2024 22:12:58 -0400
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Neither face-remap-set-base, nor face-remap-add-relative appear to work
with the cursor face.

(face-remap-set-base 'cursor :background "red")
(face-remap-add-relative 'default :background "red")


In GNU Emacs 31.0.50 (build 1, aarch64-apple-darwin23.5.0, NS
 appkit-2487.60 Version 14.5 (Build 23F79)) of 2024-06-25 built on
 Aarons-MacBook-Pro.local
Windowing system distributor 'Apple', version 10.3.2487
System Description:  macOS 14.5

Configured using:
 'configure --disable-dependency-tracking --disable-silent-rules
 --enable-locallisppath=/opt/homebrew/share/emacs/site-lisp
 --infodir=/opt/homebrew/Cellar/emacs-plus@30/30.0.50/share/info/emacs
 --prefix=/opt/homebrew/Cellar/emacs-plus@30/30.0.50 --with-xml2
 --with-gnutls --with-native-compilation --without-compress-install
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Load-path shadows:
/Users/aaronjensen/.emacs.d/elpaca/builds/lispy/elpa hides /Users/aaronjensen/.emacs.d/elpaca/builds/ivy/elpa
/Users/aaronjensen/.emacs.d/elpaca/builds/which-key/which-key hides /opt/homebrew/Cellar/emacs-plus@30/30.0.50/share/emacs/31.0.50/lisp/which-key

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Aaron Jensen <aaronjensen@HIDDEN>
Subject: bug#71829: Acknowledgement (31.0.50; face-remap does not work
 with cursor)
Message-ID: <handler.71829.B.171962719524364.ack <at> debbugs.gnu.org>
References: <m234owxzrp.fsf@HIDDEN>
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Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#71829: 31.0.50; face-remap does not work with cursor
Resent-From: Eli Zaretskii <eliz@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
Resent-CC: bug-gnu-emacs@HIDDEN
Resent-Date: Sat, 29 Jun 2024 08:02:02 +0000
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Resent-Sender: help-debbugs@HIDDEN
To: Aaron Jensen <aaronjensen@HIDDEN>
Cc: 71829 <at> debbugs.gnu.org
Date: Sat, 29 Jun 2024 11:01:05 +0300
Message-Id: <86le2ojhz2.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
In-Reply-To: <m234owxzrp.fsf@HIDDEN> (message from Aaron Jensen on Fri, 28
 Jun 2024 22:12:58 -0400)
References: <m234owxzrp.fsf@HIDDEN>
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severity 71829 wishlist
thanks

> From: Aaron Jensen <aaronjensen@HIDDEN>
> Date: Fri, 28 Jun 2024 22:12:58 -0400
> 
> 
> Neither face-remap-set-base, nor face-remap-add-relative appear to work
> with the cursor face.
> 
> (face-remap-set-base 'cursor :background "red")
> (face-remap-add-relative 'default :background "red")

The 'cursor' face is not a usual face, see its doc string.  The reason
is that cursor is drawn differently from buffer text, and is in
general much more at the control of the GUI backend.  Changing the
background color of the 'cursor' face just changes the cursor-color
parameter of the frame, and that's all; we never consul the faces when
drawing the cursor.  Thus, the face-remapping feature is not really in
effect for it, and I'm not sure it should be, given how differently
the cursor is drawn (as opposed to buffer text).

Bottom line: I don't see a bug here, perhaps a missing feature, and
personally I don't think we should provide this missing feature,
because doing so will need to resolve the non-trivial mess with
several ways we provide for changing the color of the cursor: the
face, the frame parameter, and the x-cursor-fore-pixel variable.

Message received at control <at> debbugs.gnu.org:

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Date: Sat, 29 Jun 2024 11:01:05 +0300
Message-Id: <86le2ojhz2.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: Aaron Jensen <aaronjensen@HIDDEN>
In-Reply-To: <m234owxzrp.fsf@HIDDEN> (message from Aaron Jensen on Fri, 28
 Jun 2024 22:12:58 -0400)
Subject: Re: bug#71829: 31.0.50; face-remap does not work with cursor
References: <m234owxzrp.fsf@HIDDEN>
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severity 71829 wishlist
thanks

> From: Aaron Jensen <aaronjensen@HIDDEN>
> Date: Fri, 28 Jun 2024 22:12:58 -0400
> 
> 
> Neither face-remap-set-base, nor face-remap-add-relative appear to work
> with the cursor face.
> 
> (face-remap-set-base 'cursor :background "red")
> (face-remap-add-relative 'default :background "red")

The 'cursor' face is not a usual face, see its doc string.  The reason
is that cursor is drawn differently from buffer text, and is in
general much more at the control of the GUI backend.  Changing the
background color of the 'cursor' face just changes the cursor-color
parameter of the frame, and that's all; we never consul the faces when
drawing the cursor.  Thus, the face-remapping feature is not really in
effect for it, and I'm not sure it should be, given how differently
the cursor is drawn (as opposed to buffer text).

Bottom line: I don't see a bug here, perhaps a missing feature, and
personally I don't think we should provide this missing feature,
because doing so will need to resolve the non-trivial mess with
several ways we provide for changing the color of the cursor: the
face, the frame parameter, and the x-cursor-fore-pixel variable.

Last modified: Sat, 29 Jun 2024 08:15:01 UTC

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