From 20e876dc7ef79ecbcf34414dbc1356004ada7c35 Mon Sep 17 00:00:00 2001
From: Kristaps Dzonsons <kristaps@bsd.lv>
Date: Thu, 26 Feb 2009 16:08:11 +0000
Subject: Support for macro widths (/usr/share/tmac/mdoc/doc-common).

---
 action.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 51 insertions(+), 2 deletions(-)

(limited to 'action.c')

diff --git a/action.c b/action.c
index 203982aa..ec4c9872 100644
--- a/action.c
+++ b/action.c
@@ -1,4 +1,4 @@
-/* $Id: action.c,v 1.19 2009/02/22 14:31:08 kristaps Exp $ */
+/* $Id: action.c,v 1.20 2009/02/26 16:08:11 kristaps Exp $ */
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -17,7 +17,9 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 #include <assert.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <time.h>
 
 #include "private.h"
@@ -34,6 +36,7 @@ struct	actions {
 
 /* Per-macro action routines. */
 
+static	int	 post_bl(struct mdoc *);
 static	int	 post_sh(struct mdoc *);
 static	int	 post_os(struct mdoc *);
 static	int	 post_dt(struct mdoc *);
@@ -56,7 +59,7 @@ const	struct actions mdoc_actions[MDOC_MAX] = {
 	{ NULL }, /* Dl */
 	{ NULL }, /* Bd */ 
 	{ NULL }, /* Ed */
-	{ NULL }, /* Bl */ 
+	{ post_bl }, /* Bl */ 
 	{ NULL }, /* El */
 	{ NULL }, /* It */
 	{ NULL }, /* Ad */ 
@@ -275,6 +278,52 @@ post_os(struct mdoc *mdoc)
 }
 
 
+/* 
+ * Transform -width MACRO values into real widths. 
+ */
+static int
+post_bl(struct mdoc *mdoc)
+{
+	struct mdoc_block *bl;
+	size_t		   i, width;
+	int		   tok;
+	char		   buf[32];
+
+	if (MDOC_BLOCK != mdoc->last->type)
+		return(1);
+
+	bl = &mdoc->last->data.block;
+
+	for (i = 0; i < bl->argc; i++)
+		if (MDOC_Width == bl->argv[i].arg)
+			break;
+
+	if (i == bl->argc)
+		return(1);
+
+	assert(1 == bl->argv[i].sz);
+	if (MDOC_MAX == (tok = mdoc_find(mdoc, *bl->argv[i].value)))
+		return(1);
+
+	if (0 == (width = mdoc_macro2len(tok))) 
+		return(mdoc_warn(mdoc, WARN_SYNTAX,
+					"-%s macro has no length", 
+					mdoc_argnames[MDOC_Width]));
+
+	mdoc_msg(mdoc, "re-writing %s argument: %s -> %zun", 
+			mdoc_argnames[MDOC_Width],
+			*bl->argv[i].value, width);
+
+	/* FIXME: silently truncates. */
+	(void)snprintf(buf, sizeof(buf), "%zun", width);
+
+	free(*bl->argv[i].value);
+	*bl->argv[i].value = strdup(buf);
+
+	return(1);
+}
+
+
 /* 
  * Prologue date must be parsed into document meta-data.
  */
-- 
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