Add request `trin' (translate input) to make `.asciify' work

correctly.  This is necessary since `charXXX' entity names are no
longer hardcoded in font definition files.

* src/roff/troff/charinfo.h (charinfo): Add `asciify_code' and
`translate_input' members.
(charinfo::set_asciify_code, charinfo::get_asciify_code,
charinfo::set_translation_input): New methods.
(charinfo::set_translation): Add third argument.
* src/roff/troff/input.cc (charinfo:set_translation): Set
`asciify_code'.
(do_translate): Add second argument.
(translate_input): New function.
(init_input_requests): Updated.
* src/roff/troff/node.cc (glyph_node::asciify,
composite_node::asciify): Use `get_asciify_code'.

* tmac/cp1047.tmac, tmac/latin1.tmac: Use `trin'.

* NEWS, man/groff.man, man/groff_diff.man: Updated.

1 files changed, 38 insertions, 1 deletions

diff --git a/man/groff_diff.man b/man/groff_diff.man
index 2fafc6f5..923742c7 100644
--- a/man/groff_diff.man
+++ b/man/groff_diff.man
@@ -1928,7 +1928,44 @@ request, the file cannot contain characters such as
 that are not legal troff input characters.
 .
 .TP
-.B .trnt abcd
+.BI .trin\  abcd
+This is the same as the
+.B tr
+request except that the
+.B asciify
+request will use the character code (if any) before the character
+translation.
+.
+Example:
+.
+.RS
+.IP
+.nf
+.ft CB
+.Text .trin ax
+.Text .di xxx
+.Text a
+.Text .br
+.Text .di
+.Text .xxx
+.Text .trin aa
+.Text .asciify xxx
+.Text .xxx
+.fi
+.ft
+.RE
+.
+.IP
+The result is
+.BR x\ a .
+.
+Using
+.BR tr ,
+the result would be
+.BR x\ x .
+.
+.TP
+.BI .trnt\  abcd
 This is the same as the
 .B tr
 request except that the translations do not apply to text that is