* bug#75024: [PATCH] Fix check for underlining capability on ttys
@ 2024-12-22 13:13 Gerd Möllmann
2024-12-23 5:52 ` Gerd Möllmann
0 siblings, 1 reply; 2+ messages in thread
From: Gerd Möllmann @ 2024-12-22 13:13 UTC (permalink / raw)
To: 75024
[-- Attachment #1: Type: text/plain, Size: 1973 bytes --]
Tags: patch
With current master
emacs -nw -Q on Terminal.app, $TERM=xterm-256color
1. (display-supports-face-attributes-p '(underline t))
=> nil
2. C-h f context-menu-map RET
=> The separator line in *Help* in underlined, which
means that term.c thinks that underlines can be used.
display-supports-face-attribute-p uses tty_capable_p in term.c.
This code in tty_capable_p looks wrong:
TTY_CAPABLE_P_TRY (tty,
TTY_CAP_UNDERLINE, tty->TS_enter_underline_mode,
NC_UNDERLINE);
TTY_CAPABLE_P_TRY (tty,
TTY_CAP_UNDERLINE_STYLED, tty->TF_set_underline_style,
NC_UNDERLINE);
It returns false as soon as it finds TS_enter_underline_mode is cannot
be used, and doesn't check TS_set_underline_style. The output code uses
one or the other
if (face->underline && MAY_USE_WITH_COLORS_P (tty, NC_UNDERLINE))
{
if (face->underline == FACE_UNDERLINE_SINGLE
|| !tty->TF_set_underline_style)
OUTPUT1_IF (tty, tty->TS_enter_underline_mode);
else if (tty->TF_set_underline_style)
{
char *p;
p = tparam (tty->TF_set_underline_style, NULL, 0, face->underline, 0, 0, 0);
OUTPUT (tty, p);
xfree (p);
}
}
In GNU Emacs 31.0.50 (build 6, aarch64-apple-darwin24.2.0) of 2024-12-22
built on pro2
Repository revision: d481da70010eab163d12f770ed11f8fef171406a
Repository branch: cl-packages
System Description: macOS 15.2
Configured using:
'configure --without-ns --cache-file
/var/folders/1d/k_6t25f94sl83szqbf8gpkrh0000gn/T//config.cache.cl-packages
--with-native-compilation --with-mps=yes CC=clang
'CFLAGS=-Wgnu-imaginary-constant -Wunused-result -g
-fno-omit-frame-pointer -F
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks
-Wno-ignored-attributes -Wno-flag-enum -Wno-missing-method-return-type
-Wno-variadic-macros -Wno-strict-prototypes -Wno-availability
-Wno-nullability-completeness' --prefix=/Users/gerd/.local'
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: 0001-Fix-check-for-underlining-capability-on-ttys.patch --]
[-- Type: text/patch, Size: 1991 bytes --]
From 419a5fa0fd98f673660b123f5b37c99cd0b8c61b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gerd=20M=C3=B6llmann?= <gerd@gnu.org>
Date: Sun, 22 Dec 2024 14:11:33 +0100
Subject: [PATCH] Fix check for underlining capability on ttys
* src/term.c (tty_capable_p): Check both possible terminal capabilities
for underlining.
---
src/term.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/src/term.c b/src/term.c
index f2d1846e488..875d4d2deff 100644
--- a/src/term.c
+++ b/src/term.c
@@ -2113,18 +2113,20 @@ turn_off_face (struct frame *f, struct face *face)
tty_capable_p (struct tty_display_info *tty, unsigned int caps)
{
#ifndef HAVE_ANDROID
-#define TTY_CAPABLE_P_TRY(tty, cap, TS, NC_bit) \
- if ((caps & (cap)) && (!(TS) || !MAY_USE_WITH_COLORS_P (tty, NC_bit))) \
- return 0;
+# define TTY_CAPABLE_P(tty, cap, TS, NC_bit) \
+ ((caps & (cap)) && (TS) && MAY_USE_WITH_COLORS_P (tty, NC_bit))
+# define TTY_CAPABLE_P_TRY(tty, cap, TS, NC_bit) \
+ if (!TTY_CAPABLE_P (tty, cap, TS, NC_bit)) \
+ return false;
+
+ if (!TTY_CAPABLE_P (tty, TTY_CAP_UNDERLINE, tty->TS_enter_underline_mode,
+ NC_UNDERLINE)
+ && !TTY_CAPABLE_P (tty, TTY_CAP_UNDERLINE_STYLED,
+ tty->TF_set_underline_style, NC_UNDERLINE))
+ return false;
TTY_CAPABLE_P_TRY (tty,
TTY_CAP_INVERSE, tty->TS_standout_mode, NC_REVERSE);
- TTY_CAPABLE_P_TRY (tty,
- TTY_CAP_UNDERLINE, tty->TS_enter_underline_mode,
- NC_UNDERLINE);
- TTY_CAPABLE_P_TRY (tty,
- TTY_CAP_UNDERLINE_STYLED, tty->TF_set_underline_style,
- NC_UNDERLINE);
TTY_CAPABLE_P_TRY (tty,
TTY_CAP_BOLD, tty->TS_enter_bold_mode, NC_BOLD);
TTY_CAPABLE_P_TRY (tty,
@@ -2135,8 +2137,7 @@ #define TTY_CAPABLE_P_TRY(tty, cap, TS, NC_bit) \
TTY_CAP_STRIKE_THROUGH, tty->TS_enter_strike_through_mode,
NC_STRIKE_THROUGH);
- /* We can do it! */
- return 1;
+ return true;
#else
return false;
#endif
--
2.47.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* bug#75024: [PATCH] Fix check for underlining capability on ttys
2024-12-22 13:13 bug#75024: [PATCH] Fix check for underlining capability on ttys Gerd Möllmann
@ 2024-12-23 5:52 ` Gerd Möllmann
0 siblings, 0 replies; 2+ messages in thread
From: Gerd Möllmann @ 2024-12-23 5:52 UTC (permalink / raw)
To: 75024
Gerd Möllmann <gerd.moellmann@gmail.com> writes:
> Tags: patch
Please disregard the patch. I'll send another one later.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2024-12-22 13:13 bug#75024: [PATCH] Fix check for underlining capability on ttys Gerd Möllmann
2024-12-23 5:52 ` Gerd Möllmann
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