From 1333797c489e45a9ce20753440cdba7ebadf299d Mon Sep 17 00:00:00 2001
From: Kristaps Dzonsons <kristaps@bsd.lv>
Date: Mon, 28 Jun 2010 23:26:09 +0000
Subject: Clean-up of variable-width glyph support.  Adds no new code; only
 restructured to make a bit more readable.  Also removed an unused entry in
 the PS engine structure.

---
 term.c    | 35 +++++++++++++++++++----------------
 term.h    |  3 +--
 term_ps.c | 22 ++++++++++++----------
 3 files changed, 32 insertions(+), 28 deletions(-)

diff --git a/term.c b/term.c
index 31e91e92..02dc9732 100644
--- a/term.c
+++ b/term.c
@@ -1,4 +1,4 @@
-/*	$Id: term.c,v 1.153 2010/06/28 22:46:21 kristaps Exp $ */
+/*	$Id: term.c,v 1.154 2010/06/28 23:26:09 kristaps Exp $ */
 /*
  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -161,21 +161,17 @@ term_flushln(struct termp *p)
 	 */
 	vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
 
-	/* 
-	 * FIXME: if bp is zero, we still output the first word before
-	 * breaking the line.
-	 */
-
 	vis = vend = i = 0;
-	while (i < (int)p->col) {
 
+	while (i < (int)p->col) {
 		/*
-		 * Handle literal tab characters.
+		 * Handle literal tab characters: collapse all
+		 * subsequent tabs into a single huge set of spaces.
 		 */
 		for (j = i; j < (int)p->col; j++) {
 			if ('\t' != p->buf[j])
 				break;
-			vend = (vis/p->tabwidth+1)*p->tabwidth;
+			vend = (vis / p->tabwidth + 1) * p->tabwidth;
 			vbl += vend - vis;
 			vis = vend;
 		}
@@ -191,15 +187,21 @@ term_flushln(struct termp *p)
 		for (jhy = 0; j < (int)p->col; j++) {
 			if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
 				break;
-			if (8 != p->buf[j]) {
-				if (vend > vis && vend < bp &&
-				    ASCII_HYPH == p->buf[j])
-					jhy = j;
-				vend += (*p->width)(p, p->buf[j]);
-			} else {
+
+			/* Back over the the last printed character. */
+			if (8 == p->buf[j]) {
 				assert(j);
 				vend -= (*p->width)(p, p->buf[j - 1]);
+				continue;
 			}
+
+			/* Regular word. */
+			/* Break at the hyphen point if we overrun. */
+			if (vend > vis && vend < bp && 
+					ASCII_HYPH == p->buf[j])
+				jhy = j;
+
+			vend += (*p->width)(p, p->buf[j]);
 		}
 
 		/*
@@ -308,7 +310,8 @@ term_flushln(struct termp *p)
 
 	/* Right-pad. */
 	if (maxvis > vis + /* LINTED */
-			((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
+			((TERMP_TWOSPACE & p->flags) ? 
+			 (*p->width)(p, ' ') : 0)) {
 		p->viscol += maxvis - vis;
 		(*p->advance)(p, maxvis - vis);
 		vis += (maxvis - vis);
diff --git a/term.h b/term.h
index 4293e9d6..861abc70 100644
--- a/term.h
+++ b/term.h
@@ -1,4 +1,4 @@
-/*	$Id: term.h,v 1.66 2010/06/27 01:26:20 schwarze Exp $ */
+/*	$Id: term.h,v 1.67 2010/06/28 23:26:09 kristaps Exp $ */
 /*
  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -49,7 +49,6 @@ struct	termp_ps {
 	char		 *psmarg;	/* margin buf */
 	size_t		  psmargsz;	/* margin buf size */
 	size_t		  psmargcur;	/* current pos in margin buf */
-	size_t	 	  pspage;	/* current page */
 	char		  last;		/* character buffer */
 	enum termfont	  lastf;	/* last set font */
 };
diff --git a/term_ps.c b/term_ps.c
index 00bede51..ab3de54b 100644
--- a/term_ps.c
+++ b/term_ps.c
@@ -1,4 +1,4 @@
-/*	$Id: term_ps.c,v 1.14 2010/06/28 22:46:21 kristaps Exp $ */
+/*	$Id: term_ps.c,v 1.15 2010/06/28 23:26:09 kristaps Exp $ */
 /*
  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -31,14 +31,21 @@
 #include "main.h"
 #include "term.h"
 
+/* TODO: all this will go away with different paper sizes. */
+#define	PS_CHAR_HEIGHT	  12
+#define	PS_CHAR_TOPMARG	 (792 - 24)
+#define	PS_CHAR_TOP	 (PS_CHAR_TOPMARG - 36)
+#define	PS_CHAR_LEFT	  36
+#define	PS_CHAR_BOTMARG	  24
+#define	PS_CHAR_BOT	 (PS_CHAR_BOTMARG + 36)
+
 struct	glyph {
 	int		  wx; /* WX in AFM */
 };
 
-#define	MAXCHAR		  95
-
 struct	font {
 	const char	 *name; /* FontName in AFM */
+#define	MAXCHAR		  95 /* total characters we can handle */
 	struct glyph	  gly[MAXCHAR]; /* glyph metrics */
 };
 
@@ -342,13 +349,7 @@ static	const struct font fonts[3] = {
 	} },
 };
 
-#define	PS_CHAR_HEIGHT	  12
-#define	PS_CHAR_TOPMARG	 (792 - 24)
-#define	PS_CHAR_TOP	 (PS_CHAR_TOPMARG - 36)
-#define	PS_CHAR_LEFT	  36
-#define	PS_CHAR_BOTMARG	  24
-#define	PS_CHAR_BOT	 (PS_CHAR_BOTMARG + 36)
-
+/* These work the buffer used by the header and footer. */
 #define	PS_BUFSLOP	  128
 #define	PS_GROWBUF(p, sz) \
 	do if ((p)->engine.ps.psmargcur + (sz) > \
@@ -388,6 +389,7 @@ ps_alloc(void)
 		return(NULL);
 
 	p->defrmargin = 612 - (PS_CHAR_LEFT * 2);
+
 	p->type = TERMTYPE_PS;
 	p->letter = ps_letter;
 	p->begin = ps_begin;
-- 
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