===================================================================
RCS file: /cvs/mandoc/tbl_term.c,v
retrieving revision 1.1
retrieving revision 1.4
diff -u -p -r1.1 -r1.4
--- mandoc/tbl_term.c	2011/01/02 12:21:07	1.1
+++ mandoc/tbl_term.c	2011/01/03 14:57:04	1.4
@@ -1,4 +1,4 @@
-/*	$Id: tbl_term.c,v 1.1 2011/01/02 12:21:07 kristaps Exp $ */
+/*	$Id: tbl_term.c,v 1.4 2011/01/03 14:57:04 kristaps Exp $ */
 /*
  * Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -35,18 +35,36 @@ static	void		 tbl_hframe(struct termp *, 
 				const struct tbl_span *);
 static	void		 tbl_data_number(struct termp *, 
 				const struct tbl *, 
-				const struct tbl_dat *, int);
+				const struct tbl_dat *, 
+				const struct termp_tbl *);
 static	void		 tbl_data_literal(struct termp *, 
-				const struct tbl_dat *, int);
+				const struct tbl_dat *, 
+				const struct termp_tbl *);
 static	void		 tbl_data_spanner(struct termp *, 
-				const struct tbl_dat *, int);
+				const struct tbl_dat *, 
+				const struct termp_tbl *);
 static	void		 tbl_data(struct termp *, const struct tbl *,
-				const struct tbl_dat *, int);
+				const struct tbl_dat *, 
+				const struct termp_tbl *);
 static	void		 tbl_spanner(struct termp *, 
 				const struct tbl_head *);
 static	void		 tbl_hrule(struct termp *, 
 				const struct tbl_span *);
-static	void		 tbl_vframe(struct termp *, const struct tbl *);
+static	void		 tbl_vframe(struct termp *, 
+				const struct tbl *);
+static	void	 	 tbl_calc(struct termp *,
+				const struct tbl_span *);
+static	void	 	 tbl_calc_data(struct termp *,
+				const struct tbl *, 
+				const struct tbl_dat *,
+				struct termp_tbl *);
+static	void	 	 tbl_calc_data_literal(struct termp *,
+				const struct tbl_dat *,
+				struct termp_tbl *);
+static	void	 	 tbl_calc_data_number(struct termp *,
+				const struct tbl *, 
+				const struct tbl_dat *,
+				struct termp_tbl *);
 
 void
 term_tbl(struct termp *tp, const struct tbl_span *sp)
@@ -54,54 +72,90 @@ term_tbl(struct termp *tp, const struct tbl_span *sp)
 	const struct tbl_head *hp;
 	const struct tbl_dat *dp;
 
-	if (TBL_SPAN_FIRST & sp->flags)
+	/* Inhibit printing of spaces: we do padding ourselves. */
+
+	tp->flags |= TERMP_NONOSPACE;
+	tp->flags |= TERMP_NOSPACE;
+
+	/*
+	 * The first time we're invoked for a given table block, create
+	 * the termp_tbl structure.  This contains the column
+	 * configuration for the entire table, e.g., table-wide column
+	 * width, decimal point, etc.
+	 */
+
+	if (TBL_SPAN_FIRST & sp->flags) {
+		assert(NULL == tp->tbl);
+		tp->tbl = calloc
+			(sp->tbl->cols, sizeof(struct termp_tbl));
+		if (NULL == tp->tbl) {
+			perror(NULL);
+			exit(EXIT_FAILURE);
+		}
+		tbl_calc(tp, sp);
+
+		/* Flush out any preceding data. */
 		term_flushln(tp);
+	}
 
+	/* Horizontal frame at the start of boxed tables. */
+
 	if (TBL_SPAN_FIRST & sp->flags)
 		tbl_hframe(tp, sp);
 
-	tp->flags |= TERMP_NONOSPACE;
-	tp->flags |= TERMP_NOSPACE;
+	/* Vertical frame at the start of each row. */
 
 	tbl_vframe(tp, sp->tbl);
 
+	/*
+	 * Now print the actual data itself depending on the span type.
+	 * Spanner spans get a horizontal rule; data spanners have their
+	 * data printed by matching data to header.
+	 */
+
 	switch (sp->pos) {
 	case (TBL_SPAN_HORIZ):
 		/* FALLTHROUGH */
 	case (TBL_SPAN_DHORIZ):
 		tbl_hrule(tp, sp);
-		tbl_vframe(tp, sp->tbl);
-		term_newln(tp);
-		tp->flags &= ~TERMP_NONOSPACE;
-		return;
-	default:
 		break;
-	}
+	case (TBL_SPAN_DATA):
+		/* Iterate over template headers. */
+		dp = sp->first;
+		for (hp = sp->head; hp; hp = hp->next) {
+			switch (hp->pos) {
+			case (TBL_HEAD_VERT):
+				/* FALLTHROUGH */
+			case (TBL_HEAD_DVERT):
+				tbl_spanner(tp, hp);
+				continue;
+			case (TBL_HEAD_DATA):
+				break;
+			}
+			tbl_data(tp, sp->tbl, dp, 
+				&tp->tbl[hp->ident]);
 
-	dp = sp->first;
-	for (hp = sp->head; hp; hp = hp->next) {
-		switch (hp->pos) {
-		case (TBL_HEAD_VERT):
-			/* FALLTHROUGH */
-		case (TBL_HEAD_DVERT):
-			tbl_spanner(tp, hp);
-			break;
-		case (TBL_HEAD_DATA):
-			tbl_data(tp, sp->tbl, dp, hp->width);
+			/* Go to the next data cell. */
 			if (dp)
 				dp = dp->next;
-			break;
-		default:
-			abort();
-			/* NOTREACHED */
 		}
+		break;
 	}
 
 	tbl_vframe(tp, sp->tbl);
 	term_flushln(tp);
 
-	if (TBL_SPAN_LAST & sp->flags)
+	/*
+	 * If we're the last row, clean up after ourselves: clear the
+	 * existing table configuration and set it to NULL.
+	 */
+
+	if (TBL_SPAN_LAST & sp->flags) {
 		tbl_hframe(tp, sp);
+		assert(tp->tbl);
+		free(tp->tbl);
+		tp->tbl = NULL;
+	}
 
 	tp->flags &= ~TERMP_NONOSPACE;
 
@@ -112,6 +166,7 @@ tbl_hrule(struct termp *tp, const struct tbl_span *sp)
 {
 	const struct tbl_head *hp;
 	char		 c;
+	int		 width;
 
 	/*
 	 * An hrule extends across the entire table and is demarked by a
@@ -126,15 +181,16 @@ tbl_hrule(struct termp *tp, const struct tbl_span *sp)
 	/* FIXME: don't use `+' between data and a spanner! */
 
 	for (hp = sp->head; hp; hp = hp->next) {
+		width = tp->tbl[hp->ident].width;
 		switch (hp->pos) {
 		case (TBL_HEAD_DATA):
-			tbl_char(tp, c, hp->width);
+			tbl_char(tp, c, width);
 			break;
 		case (TBL_HEAD_DVERT):
-			tbl_char(tp, '+', hp->width);
+			tbl_char(tp, '+', width);
 			/* FALLTHROUGH */
 		case (TBL_HEAD_VERT):
-			tbl_char(tp, '+', hp->width);
+			tbl_char(tp, '+', width);
 			break;
 		default:
 			abort();
@@ -147,6 +203,7 @@ static void
 tbl_hframe(struct termp *tp, const struct tbl_span *sp)
 {
 	const struct tbl_head *hp;
+	int		 width;
 
 	if ( ! (TBL_OPT_BOX & sp->tbl->opts || 
 			TBL_OPT_DBOX & sp->tbl->opts))
@@ -165,20 +222,23 @@ tbl_hframe(struct termp *tp, const struct tbl_span *sp
 
 	if (TBL_OPT_DBOX & sp->tbl->opts) {
 		term_word(tp, "+");
-		for (hp = sp->head; hp; hp = hp->next)
-			tbl_char(tp, '-', hp->width);
+		for (hp = sp->head; hp; hp = hp->next) {
+			width = tp->tbl[hp->ident].width;
+			tbl_char(tp, '-', width);
+		}
 		term_word(tp, "+");
 		term_flushln(tp);
 	}
 
 	term_word(tp, "+");
 	for (hp = sp->head; hp; hp = hp->next) {
+		width = tp->tbl[hp->ident].width;
 		switch (hp->pos) {
 		case (TBL_HEAD_DATA):
-			tbl_char(tp, '-', hp->width);
+			tbl_char(tp, '-', width);
 			break;
 		default:
-			tbl_char(tp, '+', hp->width);
+			tbl_char(tp, '+', width);
 			break;
 		}
 	}
@@ -188,12 +248,13 @@ tbl_hframe(struct termp *tp, const struct tbl_span *sp
 
 static void
 tbl_data(struct termp *tp, const struct tbl *tbl,
-		const struct tbl_dat *dp, int width)
+		const struct tbl_dat *dp, 
+		const struct termp_tbl *tbp)
 {
 	enum tbl_cellt	 pos;
 
 	if (NULL == dp) {
-		tbl_char(tp, ASCII_NBRSP, width);
+		tbl_char(tp, ASCII_NBRSP, tbp->width);
 		return;
 	}
 
@@ -201,7 +262,7 @@ tbl_data(struct termp *tp, const struct tbl *tbl,
 	case (TBL_DATA_HORIZ):
 		/* FALLTHROUGH */
 	case (TBL_DATA_DHORIZ):
-		tbl_data_spanner(tp, dp, width);
+		tbl_data_spanner(tp, dp, tbp);
 		return;
 	default:
 		break;
@@ -213,7 +274,7 @@ tbl_data(struct termp *tp, const struct tbl *tbl,
 	case (TBL_CELL_HORIZ):
 		/* FALLTHROUGH */
 	case (TBL_CELL_DHORIZ):
-		tbl_data_spanner(tp, dp, width);
+		tbl_data_spanner(tp, dp, tbp);
 		break;
 	case (TBL_CELL_LONG):
 		/* FALLTHROUGH */
@@ -222,10 +283,10 @@ tbl_data(struct termp *tp, const struct tbl *tbl,
 	case (TBL_CELL_LEFT):
 		/* FALLTHROUGH */
 	case (TBL_CELL_RIGHT):
-		tbl_data_literal(tp, dp, width);
+		tbl_data_literal(tp, dp, tbp);
 		break;
 	case (TBL_CELL_NUMBER):
-		tbl_data_number(tp, tbl, dp, width);
+		tbl_data_number(tp, tbl, dp, tbp);
 		break;
 	default:
 		abort();
@@ -261,28 +322,32 @@ tbl_vframe(struct termp *tp, const struct tbl *tbl)
 static inline void
 tbl_char(struct termp *tp, char c, int len)
 {
-	int		i;
+	int		i, sz;
 	char		cp[2];
 
 	cp[0] = c;
 	cp[1] = '\0';
 
-	for (i = 0; i < len; i++)
+	sz = term_strlen(tp, cp);
+
+	for (i = 0; i < len; i += sz)
 		term_word(tp, cp);
 }
 
 static void
-tbl_data_spanner(struct termp *tp, const struct tbl_dat *dp, int width)
+tbl_data_spanner(struct termp *tp, 
+		const struct tbl_dat *dp, 
+		const struct termp_tbl *tblp)
 {
 
 	switch (dp->pos) {
 	case (TBL_DATA_HORIZ):
 	case (TBL_DATA_NHORIZ):
-		tbl_char(tp, '-', width);
+		tbl_char(tp, '-', tblp->width);
 		break;
 	case (TBL_DATA_DHORIZ):
 	case (TBL_DATA_NDHORIZ):
-		tbl_char(tp, '=', width);
+		tbl_char(tp, '=', tblp->width);
 		break;
 	default:
 		break;
@@ -290,32 +355,35 @@ tbl_data_spanner(struct termp *tp, const struct tbl_da
 }
 
 static void
-tbl_data_literal(struct termp *tp, const struct tbl_dat *dp, int width)
+tbl_data_literal(struct termp *tp, 
+		const struct tbl_dat *dp, 
+		const struct termp_tbl *tblp)
 {
-	int		 padl, padr;
+	int		 padl, padr, ssz;
 	enum tbl_cellt	 pos;
 
 	padl = padr = 0;
 
 	pos = dp->layout ? dp->layout->pos : TBL_CELL_LEFT;
+	ssz = term_len(tp, 1);
 
 	switch (pos) {
 	case (TBL_CELL_LONG):
-		padl = 1;
-		padr = width - (int)strlen(dp->string) - 1;
+		padl = ssz;
+		padr = tblp->width - term_strlen(tp, dp->string) - ssz;
 		break;
 	case (TBL_CELL_CENTRE):
-		padl = width - (int)strlen(dp->string);
+		padl = tblp->width - term_strlen(tp, dp->string);
 		if (padl % 2)
 			padr++;
 		padl /= 2;
 		padr += padl;
 		break;
 	case (TBL_CELL_RIGHT):
-		padl = width - (int)strlen(dp->string);
+		padl = tblp->width - term_strlen(tp, dp->string);
 		break;
 	default:
-		padr = width - (int)strlen(dp->string);
+		padr = tblp->width - term_strlen(tp, dp->string);
 		break;
 	}
 
@@ -326,9 +394,10 @@ tbl_data_literal(struct termp *tp, const struct tbl_da
 
 static void
 tbl_data_number(struct termp *tp, const struct tbl *tbl,
-		const struct tbl_dat *dp, int width)
+		const struct tbl_dat *dp,
+		const struct termp_tbl *tblp)
 {
-	char		*decp, pnt;
+	char		*decp;
 	int		 d, padl, sz;
 
 	/*
@@ -337,22 +406,170 @@ tbl_data_number(struct termp *tp, const struct tbl *tb
 	 */
 
 	sz = (int)strlen(dp->string);
-	pnt = tbl->decimal;
 
-	if (NULL == (decp = strchr(dp->string, pnt))) {
+	if (NULL == (decp = strchr(dp->string, tbl->decimal))) {
 		d = sz + 1;
 	} else {
 		d = (int)(decp - dp->string) + 1;
 	}
 
-	assert(d <= dp->layout->head->decimal);
-	assert(sz - d <= dp->layout->head->width -
-			dp->layout->head->decimal);
+	assert(d <= tblp->decimal);
+	assert(sz - d <= tblp->width - tblp->decimal);
 
-	padl = dp->layout->head->decimal - d + 1;
-	assert(width - sz - padl);
+	padl = tblp->decimal - d + 1;
+	assert(tblp->width - sz - padl);
 
 	tbl_char(tp, ASCII_NBRSP, padl);
 	term_word(tp, dp->string);
-	tbl_char(tp, ASCII_NBRSP, width - sz - padl);
+	tbl_char(tp, ASCII_NBRSP, tblp->width - sz - padl);
+}
+
+static void
+tbl_calc(struct termp *tp, const struct tbl_span *sp)
+{
+	const struct tbl_dat *dp;
+	const struct tbl_head *hp;
+	struct termp_tbl *p;
+
+	/* Calculate width as the max of column cells' widths. */
+
+	hp = sp->head;
+
+	for ( ; sp; sp = sp->next) {
+		switch (sp->pos) {
+		case (TBL_DATA_HORIZ):
+			/* FALLTHROUGH */
+		case (TBL_DATA_DHORIZ):
+			continue;
+		default:
+			break;
+		}
+		for (dp = sp->first; dp; dp = dp->next) {
+			if (NULL == dp->layout)
+				continue;
+			p = &tp->tbl[dp->layout->head->ident];
+			tbl_calc_data(tp, sp->tbl, dp, p);
+		}
+	}
+
+	/* Calculate width as the simple spanner value. */
+
+	for ( ; hp; hp = hp->next) 
+		switch (hp->pos) {
+		case (TBL_HEAD_VERT):
+			tp->tbl[hp->ident].width = term_len(tp, 1);
+			break;
+		case (TBL_HEAD_DVERT):
+			tp->tbl[hp->ident].width = term_len(tp, 2);
+			break;
+		default:
+			break;
+		}
+}
+
+static void
+tbl_calc_data(struct termp *tp, const struct tbl *tbl, 
+		const struct tbl_dat *dp, struct termp_tbl *tblp)
+{
+
+	/* Branch down into data sub-types. */
+
+	switch (dp->layout->pos) {
+	case (TBL_CELL_HORIZ):
+		/* FALLTHROUGH */
+	case (TBL_CELL_DHORIZ):
+		tblp->width = 1;
+		break;
+	case (TBL_CELL_LONG):
+		/* FALLTHROUGH */
+	case (TBL_CELL_CENTRE):
+		/* FALLTHROUGH */
+	case (TBL_CELL_LEFT):
+		/* FALLTHROUGH */
+	case (TBL_CELL_RIGHT):
+		tbl_calc_data_literal(tp, dp, tblp);
+		break;
+	case (TBL_CELL_NUMBER):
+		tbl_calc_data_number(tp, tbl, dp, tblp);
+		break;
+	default:
+		abort();
+		/* NOTREACHED */
+	}
+}
+
+static void
+tbl_calc_data_number(struct termp *tp, const struct tbl *tbl, 
+		const struct tbl_dat *dp, struct termp_tbl *tblp)
+{
+	int 		 sz, d;
+	char		*cp;
+
+	/*
+	 * First calculate number width and decimal place (last + 1 for
+	 * no-decimal numbers).  If the stored decimal is subsequent
+	 * ours, make our size longer by that difference
+	 * (right-"shifting"); similarly, if ours is subsequent the
+	 * stored, then extend the stored size by the difference.
+	 * Finally, re-assign the stored values.
+	 */
+
+	/* TODO: use spacing modifier. */
+
+	assert(dp->string);
+	sz = (int)strlen(dp->string);
+
+	if (NULL == (cp = strchr(dp->string, tbl->decimal)))
+		d = sz + 1;
+	else
+		d = (int)(cp - dp->string) + 1;
+
+	sz += 2;
+
+	if (tblp->decimal > d) {
+		sz += tblp->decimal - d;
+		d = tblp->decimal;
+	} else
+		tblp->width += d - tblp->decimal;
+
+	if (sz > tblp->width)
+		tblp->width = sz;
+	if (d > tblp->decimal)
+		tblp->decimal = d;
+}
+
+static void
+tbl_calc_data_literal(struct termp *tp, 
+		const struct tbl_dat *dp, 
+		struct termp_tbl *tblp)
+{
+	int		 sz, bufsz;
+
+	/* 
+	 * Calculate our width and use the spacing, with a minimum
+	 * spacing dictated by position (centre, e.g,. gets a space on
+	 * either side, while right/left get a single adjacent space).
+	 */
+
+	assert(dp->string);
+	sz = term_strlen(tp, dp->string);
+
+	switch (dp->layout->pos) {
+	case (TBL_CELL_LONG):
+		/* FALLTHROUGH */
+	case (TBL_CELL_CENTRE):
+		bufsz = 2;
+		break;
+	default:
+		bufsz = 1;
+		break;
+	}
+
+	if (dp->layout->spacing)
+		bufsz = bufsz > dp->layout->spacing ? 
+			bufsz : dp->layout->spacing;
+
+	sz += bufsz;
+	if (tblp->width < sz)
+		tblp->width = sz;
 }