Initial chunks for variable-width fonts. Pushes all width calculations

in mdoc_term.c and man_term.c down into term.c.  This is still not
implemented in term.c, although stubs for width calculations are in
place.  From now on, offset, rmargin, and other layout variables are
abstract screen widths.  They will resolve to the the familiar values
for -Tascii but -Tps will eventually use points instead of chars.

1 files changed, 42 insertions, 40 deletions

diff --git a/mdoc_term.c b/mdoc_term.c
index c3dc634a..b9e7823d 100644
--- a/mdoc_term.c
+++ b/mdoc_term.c
@@ -1,4 +1,4 @@
-/*	$Id: mdoc_term.c,v 1.156 2010/06/19 20:46:28 kristaps Exp $ */
+/*	$Id: mdoc_term.c,v 1.157 2010/06/25 18:53:14 kristaps Exp $ */
 /*
  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -52,9 +52,9 @@ struct	termact {
 	void	(*post)(DECL_ARGS);
 };
 
-static	size_t	  a2width(const char *);
-static	size_t	  a2height(const struct mdoc_node *);
-static	size_t	  a2offs(const char *);
+static	size_t	  a2width(const struct termp *, const char *);
+static	size_t	  a2height(const struct termp *, const char *);
+static	size_t	  a2offs(const struct termp *, const char *);
 
 static	int	  arg_hasattr(int, const struct mdoc_node *);
 static	int	  arg_getattr(int, const struct mdoc_node *);
@@ -271,7 +271,7 @@ terminal_mdoc(void *arg, const struct mdoc *mdoc)
 
 	p->overstep = 0;
 	p->maxrmargin = p->defrmargin;
-	p->tabwidth = 5;
+	p->tabwidth = term_len(p, 5);
 
 	if (NULL == p->symtab)
 		switch (p->enc) {
@@ -369,14 +369,15 @@ print_mdoc_foot(struct termp *p, const void *arg)
 	term_vspace(p);
 
 	p->offset = 0;
-	p->rmargin = (p->maxrmargin - strlen(buf) + 1) / 2;
+	p->rmargin = (p->maxrmargin - 
+			term_strlen(p, buf) + term_len(p, 1)) / 2;
 	p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;
 
 	term_word(p, os);
 	term_flushln(p);
 
 	p->offset = p->rmargin;
-	p->rmargin = p->maxrmargin - strlen(os);
+	p->rmargin = p->maxrmargin - term_strlen(p, os);
 	p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
 
 	term_word(p, buf);
@@ -432,14 +433,15 @@ print_mdoc_head(struct termp *p, const void *arg)
 	snprintf(title, BUFSIZ, "%s(%s)", m->title, m->msec);
 
 	p->offset = 0;
-	p->rmargin = (p->maxrmargin - strlen(buf) + 1) / 2;
+	p->rmargin = (p->maxrmargin - 
+			term_strlen(p, buf) + term_len(p, 1)) / 2;
 	p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
 
 	term_word(p, title);
 	term_flushln(p);
 
 	p->offset = p->rmargin;
-	p->rmargin = p->maxrmargin - strlen(title);
+	p->rmargin = p->maxrmargin - term_strlen(p, title);
 	p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
 
 	term_word(p, buf);
@@ -460,34 +462,33 @@ print_mdoc_head(struct termp *p, const void *arg)
 
 
 static size_t
-a2height(const struct mdoc_node *n)
+a2height(const struct termp *p, const char *v)
 {
 	struct roffsu	 su;
 
-	assert(MDOC_TEXT == n->type);
-	assert(n->string);
-	if ( ! a2roffsu(n->string, &su, SCALE_VS))
-		SCALE_VS_INIT(&su, strlen(n->string));
+	assert(v);
+	if ( ! a2roffsu(v, &su, SCALE_VS))
+		SCALE_VS_INIT(&su, term_len(p, 1));
 
-	return(term_vspan(&su));
+	return(term_vspan(p, &su));
 }
 
 
 static size_t
-a2width(const char *v)
+a2width(const struct termp *p, const char *v)
 {
 	struct roffsu	 su;
 
 	assert(v);
 	if ( ! a2roffsu(v, &su, SCALE_MAX))
-		SCALE_HS_INIT(&su, strlen(v));
+		SCALE_HS_INIT(&su, term_strlen(p, v));
 
-	return(term_hspan(&su));
+	return(term_hspan(p, &su));
 }
 
 
 static size_t
-a2offs(const char *v)
+a2offs(const struct termp *p, const char *v)
 {
 	struct roffsu	 su;
 
@@ -496,13 +497,13 @@ a2offs(const char *v)
 	else if (0 == strcmp(v, "left"))
 		return(0);
 	else if (0 == strcmp(v, "indent"))
-		return(INDENT + 1);
+		return(term_len(p, INDENT + 1));
 	else if (0 == strcmp(v, "indent-two"))
-		return((INDENT + 1) * 2);
+		return(term_len(p, (INDENT + 1) * 2));
 	else if ( ! a2roffsu(v, &su, SCALE_MAX))
-		SCALE_HS_INIT(&su, strlen(v));
+		SCALE_HS_INIT(&su, term_strlen(p, v));
 
-	return(term_hspan(&su));
+	return(term_hspan(p, &su));
 }
 
 
@@ -644,7 +645,7 @@ termp_it_pre(DECL_ARGS)
 	width = offset = 0;
 
 	if (bl->data.Bl.offs)
-		offset = a2offs(bl->data.Bl.offs);
+		offset = a2offs(p, bl->data.Bl.offs);
 
 	switch (type) {
 	case (LIST_column):
@@ -664,7 +665,8 @@ termp_it_pre(DECL_ARGS)
 		 */
 		ncols = bl->args->argv[col].sz;
 		/* LINTED */
-		dcol = ncols < 5 ? 4 : ncols == 5 ? 3 : 1;
+		dcol = ncols < 5 ? term_len(p, 4) : 
+			ncols == 5 ? term_len(p, 3) : term_len(p, 1);
 
 		/*
 		 * Calculate the offset by applying all prior MDOC_BODY,
@@ -675,7 +677,7 @@ termp_it_pre(DECL_ARGS)
 				nn->prev && i < (int)ncols; 
 				nn = nn->prev, i++)
 			offset += dcol + a2width
-				(bl->args->argv[col].value[i]);
+				(p, bl->args->argv[col].value[i]);
 
 		/*
 		 * When exceeding the declared number of columns, leave
@@ -690,7 +692,7 @@ termp_it_pre(DECL_ARGS)
 		 * Use the declared column widths, extended as explained
 		 * in the preceding paragraph.
 		 */
-		width = a2width(bl->args->argv[col].value[i]) + dcol;
+		width = a2width(p, bl->args->argv[col].value[i]) + dcol;
 		break;
 	default:
 		if (NULL == bl->data.Bl.width)
@@ -702,7 +704,7 @@ termp_it_pre(DECL_ARGS)
 		 * handling for column for how this changes.
 		 */
 		assert(bl->data.Bl.width);
-		width = a2width(bl->data.Bl.width) + 2;
+		width = a2width(p, bl->data.Bl.width) + term_len(p, 2);
 		break;
 	}
 
@@ -718,22 +720,22 @@ termp_it_pre(DECL_ARGS)
 	case (LIST_dash):
 		/* FALLTHROUGH */
 	case (LIST_hyphen):
-		if (width < 4)
-			width = 4;
+		if (width < term_len(p, 4))
+			width = term_len(p, 4);
 		break;
 	case (LIST_enum):
-		if (width < 5)
-			width = 5;
+		if (width < term_len(p, 5))
+			width = term_len(p, 5);
 		break;
 	case (LIST_hang):
 		if (0 == width)
-			width = 8;
+			width = term_len(p, 8);
 		break;
 	case (LIST_column):
 		/* FALLTHROUGH */
 	case (LIST_tag):
 		if (0 == width)
-			width = 10;
+			width = term_len(p, 10);
 		break;
 	default:
 		break;
@@ -1374,7 +1376,7 @@ termp_sh_pre(DECL_ARGS)
 		term_fontpush(p, TERMFONT_BOLD);
 		break;
 	case (MDOC_BODY):
-		p->offset = INDENT;
+		p->offset = term_len(p, INDENT);
 		break;
 	default:
 		break;
@@ -1459,7 +1461,7 @@ termp_d1_pre(DECL_ARGS)
 	if (MDOC_BLOCK != n->type)
 		return(1);
 	term_newln(p);
-	p->offset += (INDENT + 1);
+	p->offset += term_len(p, (INDENT + 1));
 	return(1);
 }
 
@@ -1587,7 +1589,7 @@ termp_bd_pre(DECL_ARGS)
 		return(0);
 
 	if (n->data.Bd.offs)
-		p->offset += a2offs(n->data.Bd.offs);
+		p->offset += a2offs(p, n->data.Bd.offs);
 
 	/*
 	 * If -ragged or -filled are specified, the block does nothing
@@ -1602,7 +1604,7 @@ termp_bd_pre(DECL_ARGS)
 		return(1);
 
 	tabwidth = p->tabwidth;
-	p->tabwidth = 8;
+	p->tabwidth = term_len(p, 8);
 	rm = p->rmargin;
 	rmax = p->maxrmargin;
 	p->rmargin = p->maxrmargin = TERM_MAXMARGIN;
@@ -1777,7 +1779,7 @@ termp_ss_pre(DECL_ARGS)
 		break;
 	case (MDOC_HEAD):
 		term_fontpush(p, TERMFONT_BOLD);
-		p->offset = HALFINDENT;
+		p->offset = term_len(p, HALFINDENT);
 		break;
 	default:
 		break;
@@ -1853,7 +1855,7 @@ termp_sp_pre(DECL_ARGS)
 
 	switch (n->tok) {
 	case (MDOC_sp):
-		len = n->child ? a2height(n->child) : 1;
+		len = n->child ? a2height(p, n->child->string) : 1;
 		break;
 	case (MDOC_br):
 		len = 0;