doc/src/lib/roff.im

if false
==================================================================================
	Copyright (c) 2020 Nokia
	Copyright (c) 2020 AT&T Intellectual Property.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================================
.fi

.if false
	Mnemonic:	troff.im
	Abstract:	This file provides macros allowing {X}fm source to generate
				troff input from {X}fm source when the doc is passed through
				tfm.  This allows the more easily read {X}fm source to be used
				to generate man pages, and to be able to generate the man pages
				in various output formats (txt, rst, etc.).

	Author:		E. Scott Daniels
	Date:		27 January 2019

		Some roff information was gleanded from these pages:
			http://cmd.inp.nsk.su/old/cmd2/manuals/unix/UNIX_Unleashed/ch08.htm
			https://www.gnu.org/software/groff/manual/html_node/Basics.html
.fi

.** assume that we're generating roff output when tfm is used. These macros
.** convert {X}fm input into troff.

.dv h1 .sp 1 ^&bold($1) .br  ^&space
.dv h2 .sp 1 ^&bold($1) .br ^&space
.dv h3 .sp 1 ^&bold($1) .br ^&space

.dv fig
.dv set_font_cw .br ^^.ft CW

.dv nf ^^.nf .br .nf
.dv fo .fo ^^.fi  .br

.dv center .br ^^.ce 1 .br $1 .br
.dv center_start .br ^^.ce 999
.dv center_end .br ^.ce 0

.dv esc : .** rst needs an escape for some things

.dv line_len ^^.ll $1
.dv space .br ^^.sp 1 .br
.dv half_space .br ^^.sp 1 .br
.dv mult_space .br ^^.sp $1 .br
.dv beg_list
.dv end_list
.dv beg_dlist .dv udi -$1 ^: ^^.in +$1 .br ^^.sp 1 .br
.dv end_dlist .br ^^.in &udi .br
.dv ditem ^^.ti ^&udi  .br ^&space .br \fB$1\fR .br
.dv item ^&space \(bu
.dv li ^&space \(bu
.** .dv di ^&ditem
.dv di ^^.ti ^&udi  .br ^&space .br \fB$1\fR .br

.dv figure

.dv ex_start ^^.IP .br ^^.nf .br ^^.ft CW .br .nf
.dv ex_end .fo on .br ^^.ft P .br ^^.fi .br ^&space

.dv proto_start .sp 1 .cc .5i .st 9 .sf Courier-bold .nf
.dv proto_end .fo on .sf ^&text_font .st ^&text_size .sp .3

.** fonts and font macros
.dv ital \fI$1\fR
.dv bold \fB$1\fR
.dv cw \f(CW$1\fP
.dv set_font_prop .br ^^.ft P

.ju off
.in 0

.dv indent ^^.ll -0.5i &space ^^.in +0.25i
.dv uindent ^^.in -0.25i &space ^^.ll +0.5i