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bug#39245: 26.3; 'mouse-face highlighting is extended beyond EOB
From: |
Lars Ingebrigtsen |
Subject: |
bug#39245: 26.3; 'mouse-face highlighting is extended beyond EOB |
Date: |
Wed, 28 Oct 2020 13:36:09 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
ynyaaa@gmail.com writes:
> If a buffer does not end with a newline and 'mouse-face property is
> added at the last character, 'mouse-face highlighting covers the blank
> area to the right of the last character.
>
> If 'mouse-face region contains newline characters,
> the blank area to the right of the last character is not highlighted.
>
> Example: Evaluate the form below and move the mouse pointer onto 'XYZ'.
> Then the blank area to the right of 'Z' is highlighted.
> If a newline character is inserted between 'X' and 'Y',
> the blank area to the right of 'Z' is not highlighted.
>
> (let ((buf (generate-new-buffer "tmp")))
> (switch-to-buffer buf)
> (insert (propertize "XYZ" 'mouse-face 'region)))
This behaviour is still present in Emacs 28.
But I'm not sure what the correct behaviour would be. Since mouse-face
has :extend, would it make sense to also extend it at eob? Possibly...
not?
In any case, the current behaviour is a bug -- if it should extend at
eob, it should continue to do so even if the area has a newline, I
think. (Or not extend at eob at all.)
This is just an issue with mouse-face, face doesn't have this problem:
(let ((buf (generate-new-buffer "tmp")))
(switch-to-buffer buf)
(insert (propertize "XYZ" 'face 'region)))
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
- bug#39245: 26.3; 'mouse-face highlighting is extended beyond EOB,
Lars Ingebrigtsen <=