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bug#59947: 30.0.50; Underline of tab-bar face does not respect x-underli
From: |
Gabriel |
Subject: |
bug#59947: 30.0.50; Underline of tab-bar face does not respect x-underline-at-descent-line |
Date: |
Sat, 10 Dec 2022 15:22:20 -0300 |
Description:
Apparently, the underline property of tab-bar (and tab-bar-*) face does
not respect the option x-underline-at-descent-line. When
x-underline-at-descent-line is set to t, the underline is displayed at
descent level (below of bottom box), but in tab-bar face it's displayed
at the baseline (above of bottom box). See steps below and attached
images for more information.
Steps:
1) emacs -q (master "fbbf3610fd5b27873e13cfd7702d5b0bbb15c2f8")
2) Enable tab-bar and tab-line:
(progn
(tab-bar-mode 1)
(global-tab-line-mode 1))
3) Set box, overline and underline of tab-tab face:
(set-face-attribute 'tab-bar
nil
:box '(:style flat-button
:line-width 12
:color "green")
:overline "red"
:underline "red")
Result: a green box is displayed in tab-bar, a red overline is displayed
above of top box and a red underline is displayed above of bottom box.
4) Set box, overline and underline of tab-line face:
(set-face-attribute 'tab-line
nil
:box '(:style flat-button
:line-width 12
:color "yellow")
:overline "blue"
:underline "blue")
Result: a yellow box is displayed in tab-line, a blue overline is
displayed above of top box and a blue underline is displayed above of
bottom box.
See image step-4.png
Note: I am not sure why the underline and overline of tab-bar face are
not extended as in tab-line. I tried many approaches (e.g. using
:extend t, using other tab-bar-* faces, tweaking tab-line-format etc)
but nothing worked for me. Perhaps it's something related to the bug
reported here.
5) Set x-underline-at-descent-line:
(setopt x-underline-at-descent-line t)
Result: The tab-line underline is now displayed below the bottom box,
but the tab-bar underline is not affected. I tried many approaches
(e.g.: tweaking the variables x-underline-at-descent-line,
x-use-underline-position-properties and underline-minimum-offset, using
other tab-bar-* faces etc) to make it work, but nothing worked for me.
See image step5.png
step-4.png
Description: PNG image
step-5.png
Description: PNG image
---
Gabriel
- bug#59947: 30.0.50; Underline of tab-bar face does not respect x-underline-at-descent-line,
Gabriel <=