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[groff] 01/08: [ms]: Add \*<, \*> for subscripting.
From: |
G. Branden Robinson |
Subject: |
[groff] 01/08: [ms]: Add \*<, \*> for subscripting. |
Date: |
Sat, 31 Oct 2020 23:48:20 -0400 (EDT) |
gbranden pushed a commit to branch master
in repository groff.
commit cc558e470c6e58e9c10292ce42d3a1efc833e31c
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Sat Oct 31 21:29:49 2020 +1100
[ms]: Add \*<, \*> for subscripting.
* tmac/s.tmac: Implement \*< and \*> strings for subscripting. groff ms
has had (extension) strings for superscripting since 1991 at the
latest, and the asymmetry possessed me of a madness. Both pairs of
string names follow similar usage in Eric Allman's "me" macros.
* NEWS:
* doc/groff.texi:
* tmac/groff_ms.7.man: Document it.
---
ChangeLog | 12 ++++++++++++
NEWS | 4 ++++
doc/groff.texi | 5 +++++
tmac/groff_ms.7.man | 8 ++++++++
tmac/s.tmac | 6 ++++++
5 files changed, 35 insertions(+)
diff --git a/ChangeLog b/ChangeLog
index afa68a5..a0b6b9d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,17 @@
2020-10-31 G. Branden Robinson <g.branden.robinson@gmail.com>
+ * tmac/s.tmac: Implement \*< and \*> strings for subscripting.
+ groff ms has had (extension) strings for superscripting since
+ 1991 at the latest, and the asymmetry possessed me of a madness.
+ Both pairs of string names follow similar usage in Eric Allman's
+ "me" macros.
+
+ * NEWS:
+ * doc/groff.texi:
+ * tmac/groff_ms.7.man: Document it.
+
+2020-10-31 G. Branden Robinson <g.branden.robinson@gmail.com>
+
* tmac/groff_mdoc.7.man (Predefined strings): Fix error; the
\*[Lq] and \*[Rq] strings degrade to neutral double quotes (")
on "nroff" devices (-Tascii and -Tlatin1), not "``" and "''".
diff --git a/NEWS b/NEWS
index d09bce0..35d7722 100644
--- a/NEWS
+++ b/NEWS
@@ -112,6 +112,10 @@ o The doc (mdoc) macro package now honors the HY register
as the an
furthermore recognizes but ignores the AD string (see above) for
compatibility with an (man).
+o The s (ms) macro package has added strings, \*< and \*>, to perform
+ subscripting within a paragraph. They work analogously to the \*{ and
+ \*} strings that have been present in groff ms since 1991 or earlier.
+
o The s (ms) macro package no longer manipulates the warning level. If
you want all warnings on, use the ".warn" request with no arguments in
your ms document or pass "-w w" to groff (see troff(1) or the groff
diff --git a/doc/groff.texi b/doc/groff.texi
index 3b28f65..6ff849a 100644
--- a/doc/groff.texi
+++ b/doc/groff.texi
@@ -3239,6 +3239,11 @@ Text enclosed with @code{\*@{} and @code{\*@}} is
printed as a
superscript.
@endDefstr
+@DefstrList {<, ms}
+@DefstrListEndx {>, ms}
+Text enclosed with @code{\*<} and @code{\*>} is printed as a subscript.
+@endDefstr
+
@c ---------------------------------------------------------------------
@node Lists in ms, Indentation values in ms, Highlighting in ms, ms Body Text
diff --git a/tmac/groff_ms.7.man b/tmac/groff_ms.7.man
index d7992d3..8b9967e 100644
--- a/tmac/groff_ms.7.man
+++ b/tmac/groff_ms.7.man
@@ -830,6 +830,7 @@ the normal point size
.B PS
register).
.
+.
.TP
.BI \[rs]*{ text \[rs]*}
Print the enclosed
@@ -837,6 +838,13 @@ Print the enclosed
as a superscript.
.
.
+.TP
+.BI \[rs]*< text \[rs]*>
+Print the enclosed
+.I text
+as a subscript.
+.
+.
.\" ====================================================================
.SS Indents
.\" ====================================================================
diff --git a/tmac/s.tmac b/tmac/s.tmac
index fafa93e..29a2d1b 100644
--- a/tmac/s.tmac
+++ b/tmac/s.tmac
@@ -1508,10 +1508,16 @@ along with this program. If not, see
<http://www.gnu.org/licenses/>.
\s[\\n[.s]*8u/10u]UNIX\s0\\$1\\*[par*ux-rg]
.ds par*ux-rg
..
+.\" superscript
.ds par@sup-start \v'-.9m\s'\En[.s]*7u/10u'+.7m'
.als { par@sup-start
.ds par@sup-end \v'-.7m\s0+.9m'
.als } par@sup-end
+.\" subscript
+.ds par@sub-start \v'+.3m\s'\En[.s]*7u/10u'-.1m'
+.als < par@sub-start
+.ds par@sub-end \v'+.1m\s0-.3m'
+.als > par@sub-end
.\" footnote paragraphs
.\" FF is the footnote format
.nr FF 0
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