Initial list support (not nested, yet).

1 files changed, 283 insertions, 88 deletions

diff --git a/term.c b/term.c
index 2a4aa003..c5f0edb5 100644
--- a/term.c
+++ b/term.c
@@ -1,4 +1,4 @@
-/* $Id: term.c,v 1.2 2009/02/20 23:35:36 kristaps Exp $ */
+/* $Id: term.c,v 1.3 2009/02/21 14:56:58 kristaps Exp $ */
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -28,7 +28,6 @@
 
 #include "private.h"
 
-
 enum	termesc {
 	ESC_CLEAR,
 	ESC_BOLD,
@@ -36,14 +35,17 @@ enum	termesc {
 };
 
 struct	termp {
-	size_t		  maxvisible;
+	size_t		  rmargin;
+	size_t		  maxrmargin;
 	size_t		  maxcols;
-	size_t		  indent;
+	size_t		  offset;
 	size_t		  col;
 	int		  flags;
-#define	TERMP_BOLD	 (1 << 0)
-#define	TERMP_UNDERLINE	 (1 << 1)
-#define	TERMP_NOSPACE	 (1 << 2)
+#define	TERMP_BOLD	 (1 << 0)	/* Embolden words. */
+#define	TERMP_UNDERLINE	 (1 << 1)	/* Underline words. */
+#define	TERMP_NOSPACE	 (1 << 2)	/* No space before words. */
+#define	TERMP_NOLPAD	 (1 << 3)	/* No left-padding. */
+#define	TERMP_NOBREAK	 (1 << 4)	/* No break after line */
 	char		 *buf;
 };
 
@@ -64,53 +66,42 @@ static	void		  termprint_header(struct termp *,
 static	void		  termprint_footer(struct termp *,
 				const struct mdoc_meta *);
 
+static	int		  arg_hasattr(int, size_t, 
+				const struct mdoc_arg *);
+static	int		  arg_getattr(int, size_t, 
+				const struct mdoc_arg *);
+
 static	void		  newln(struct termp *);
 static	void		  vspace(struct termp *);
 static	void		  pword(struct termp *, const char *, size_t);
 static	void		  word(struct termp *, const char *);
 
-static	int		  termp_it_pre(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_ns_pre(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_pp_pre(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_fl_pre(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_op_pre(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_op_post(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_bl_post(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_sh_post(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_sh_pre(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_nd_pre(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_bold_pre(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_under_pre(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_bold_post(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
-static	int		  termp_under_post(struct termp *, 
-				const struct mdoc_meta *,
-				const struct mdoc_node *);
+#define	decl_prepost(name, suffix) \
+static	int		  name##_##suffix(struct termp *, \
+				const struct mdoc_meta *, \
+				const struct mdoc_node *)
+
+#define	decl_pre(name)	  decl_prepost(name, pre)
+#define	decl_post(name)   decl_prepost(name, post)
+
+decl_pre(termp_fl);
+decl_pre(termp_it);
+decl_pre(termp_nd);
+decl_pre(termp_ns);
+decl_pre(termp_op);
+decl_pre(termp_pp);
+decl_pre(termp_sh);
+
+decl_post(termp_bl);
+decl_post(termp_it);
+decl_post(termp_op);
+decl_post(termp_sh);
+
+decl_pre(termp_bold);
+decl_pre(termp_under);
+
+decl_post(termp_bold);
+decl_post(termp_under);
 
 const	struct termact termacts[MDOC_MAX] = {
 	{ NULL, NULL }, /* \" */
@@ -126,7 +117,7 @@ const	struct termact termacts[MDOC_MAX] = {
 	{ NULL, NULL }, /* Ed */
 	{ NULL, termp_bl_post }, /* Bl */
 	{ NULL, NULL }, /* El */
-	{ termp_it_pre, NULL }, /* It */
+	{ termp_it_pre, termp_it_post }, /* It */
 	{ NULL, NULL }, /* Ad */ 
 	{ NULL, NULL }, /* An */
 	{ termp_under_pre, termp_under_post }, /* Ar */
@@ -222,18 +213,61 @@ const	struct termact termacts[MDOC_MAX] = {
 };
 
 
+static int
+arg_hasattr(int arg, size_t argc, const struct mdoc_arg *argv)
+{
+
+	return(-1 != arg_getattr(arg, argc, argv));
+}
+
+
+static int
+arg_getattr(int arg, size_t argc, const struct mdoc_arg *argv)
+{
+	int		 i;
+
+	for (i = 0; i < (int)argc; i++) 
+		if (argv[i].arg == arg)
+			return(i);
+	return(-1);
+}
+
+
 static void
-flush(struct termp *p)
+flushln(struct termp *p)
 {
 	size_t		 i, j, vsz, vis, maxvis;
 
-	maxvis = p->maxvisible - (p->indent * 4);
+	/*
+	 * First, establish the maximum columns of "visible" content.
+	 * This is usually the difference between the right-margin and
+	 * an indentation, but can be, for tagged lists or columns, a
+	 * small set of values.
+	 */
+
+	assert(p->offset < p->rmargin);
+	maxvis = p->rmargin - p->offset;
 	vis = 0;
 
-	for (j = 0; j < (p->indent * 4); j++)
-		putchar(' ');
+	/*
+	 * If in the standard case (left-justified), then begin with our
+	 * indentation, otherwise (columns, etc.) just start spitting
+	 * out text.
+	 */
+
+	if ( ! (p->flags & TERMP_NOLPAD))
+		/* LINTED */
+		for (j = 0; j < p->offset; j++)
+			putchar(' ');
 
 	for (i = 0; i < p->col; i++) {
+		/*
+		 * Count up visible word characters.  Control sequences
+		 * (starting with the CSI) aren't counted. 
+		 */
+		assert( ! isspace(p->buf[i]));
+
+		/* LINTED */
 		for (j = i, vsz = 0; j < p->col; j++) {
 			if (isspace(p->buf[j]))
 				break;
@@ -245,12 +279,31 @@ flush(struct termp *p)
 		}
 		assert(vsz > 0);
 
+		/*
+		 * If a word is too long and we're within a line, put it
+		 * on the next line.  Puke if we're being asked to write
+		 * something that will exceed the right margin (i.e.,
+		 * from a fresh line or when we're not allowed to break
+		 * the line with TERMP_NOBREAK).
+		 */
+
 		if (vis && vis + vsz >= maxvis) {
+			/* FIXME */
+			if (p->flags & TERMP_NOBREAK)
+				errx(1, "word breaks right margin");
 			putchar('\n');
-			for (j = 0; j < (p->indent * 4); j++)
+			for (j = 0; j < p->offset; j++)
 				putchar(' ');
 			vis = 0;
-		} 
+		} else if (vis + vsz >= maxvis) {
+			/* FIXME */
+			errx(1, "word breaks right margin");
+		}
+
+		/* 
+		 * Write out the word and a trailing space.  Omit the
+		 * space if we're the last word in the line.
+		 */
 
 		for ( ; i < p->col; i++) {
 			if (isspace(p->buf[i]))
@@ -264,7 +317,17 @@ flush(struct termp *p)
 		}
 	}
 
-	putchar('\n');
+	/*
+	 * If we're not to right-marginalise it (newline), then instead
+	 * pad to the right margin and stay off.
+	 */
+
+	if (p->flags & TERMP_NOBREAK) {
+		for ( ; vis <= maxvis; vis++)
+			putchar(' ');
+	} else
+		putchar('\n');
+
 	p->col = 0;
 }
 
@@ -273,10 +336,14 @@ static void
 newln(struct termp *p)
 {
 
+	/* 
+	 * A newline only breaks an existing line; it won't assert
+	 * vertical space.
+	 */
 	p->flags |= TERMP_NOSPACE;
 	if (0 == p->col) 
 		return;
-	flush(p);
+	flushln(p);
 }
 
 
@@ -284,6 +351,10 @@ static void
 vspace(struct termp *p)
 {
 
+	/*
+	 * Asserts a vertical space (a full, empty line-break between
+	 * lines).
+	 */
 	newln(p);
 	putchar('\n');
 }
@@ -293,9 +364,9 @@ static void
 chara(struct termp *p, char c)
 {
 
+	/* TODO: dynamically expand the buffer. */
 	if (p->col + 1 >= p->maxcols)
 		errx(1, "line overrun");
-
 	p->buf[(p->col)++] = c;
 }
 
@@ -344,6 +415,8 @@ pword(struct termp *p, const char *word, size_t len)
 	if (p->flags & TERMP_UNDERLINE)
 		escape(p, ESC_UNDERLINE);
 
+	/* TODO: escape patterns. */
+
 	for (i = 0; i < len; i++) 
 		chara(p, word[i]);
 
@@ -358,11 +431,13 @@ word(struct termp *p, const char *word)
 {
 	size_t 		 i, j, len;
 
-	/* TODO: delimiters? */
+	if (mdoc_isdelim(word))
+		p->flags |= TERMP_NOSPACE;
 
 	len = strlen(word);
 	assert(len > 0);
 
+	/* LINTED */
 	for (j = i = 0; i < len; i++) {
 		if ( ! isspace(word[i])) {
 			j++;
@@ -381,23 +456,130 @@ word(struct termp *p, const char *word)
 }
 
 
+/* ARGSUSED */
 static int
-termp_it_pre(struct termp *p, const struct mdoc_meta *meta,
+termp_it_post(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
 {
+	const struct mdoc_node *n, *it;
+	const struct mdoc_block *bl;
+	int		 i;
+	size_t		 width;
 
 	switch (node->type) {
+	case (MDOC_BODY):
+		/* FALLTHROUGH */
 	case (MDOC_HEAD):
-		/* TODO: only print one, if compat. */
-		vspace(p);
 		break;
 	default:
+		return(1);
+	}
+
+	it = node->parent;
+	assert(MDOC_BLOCK == it->type);
+	assert(MDOC_It == it->tok);
+
+	n = it->parent;
+	assert(MDOC_BODY == n->type);
+	assert(MDOC_Bl == n->tok);
+	n = n->parent;
+	bl = &n->data.block;
+
+	/* If `-tag', adjust our margins accordingly. */
+
+	if (arg_hasattr(MDOC_Tag, bl->argc, bl->argv)) {
+		i = arg_getattr(MDOC_Width, bl->argc, bl->argv);
+		assert(i >= 0);
+		assert(1 == bl->argv[i].sz);
+		width = strlen(*bl->argv[i].value); /* XXX */
+
+		if (MDOC_HEAD == node->type) {
+			flushln(p);
+			/* FIXME: nested lists. */
+			p->rmargin = p->maxrmargin;
+			p->flags &= ~TERMP_NOBREAK;
+		} else {
+			flushln(p);
+			p->offset -= width + 1;
+			p->flags &= ~TERMP_NOLPAD;
+		}
+	}
+
+	return(1);
+}
+
+
+/* ARGSUSED */
+static int
+termp_it_pre(struct termp *p, const struct mdoc_meta *meta,
+		const struct mdoc_node *node)
+{
+	const struct mdoc_node *n, *it;
+	const struct mdoc_block *bl;
+	int		 i;
+	size_t		 width;
+
+	switch (node->type) {
+	case (MDOC_BODY):
+		/* FALLTHROUGH */
+	case (MDOC_HEAD):
+		it = node->parent;
+		break;
+	case (MDOC_BLOCK):
+		it = node;
 		break;
+	default:
+		return(1);
+	}
+
+	assert(MDOC_BLOCK == it->type);
+	assert(MDOC_It == it->tok);
+
+	n = it->parent;
+	assert(MDOC_BODY == n->type);
+	assert(MDOC_Bl == n->tok);
+	n = n->parent;
+	bl = &n->data.block;
+
+	/* If `-compact', don't assert vertical space. */
+
+	if (MDOC_BLOCK == node->type) {
+		if (arg_hasattr(MDOC_Compact, bl->argc, bl->argv))
+			newln(p);
+		else
+			vspace(p);
+		return(1);
+	}
+
+	assert(MDOC_HEAD == node->type 
+			|| MDOC_BODY == node->type);
+
+	/* If `-tag', adjust our margins accordingly. */
+
+	if (arg_hasattr(MDOC_Tag, bl->argc, bl->argv)) {
+		i = arg_getattr(MDOC_Width, bl->argc, bl->argv);
+		assert(i >= 0); /* XXX */
+		assert(1 == bl->argv[i].sz);
+		width = strlen(*bl->argv[i].value); /* XXX */
+
+		/* FIXME: nested lists. */
+
+		if (MDOC_HEAD == node->type) {
+			p->flags |= TERMP_NOBREAK;
+			p->flags |= TERMP_NOSPACE;
+			p->rmargin = p->offset + width;
+		} else {
+			p->flags |= TERMP_NOSPACE;
+			p->flags |= TERMP_NOLPAD;
+			p->offset += width + 1;
+		}
 	}
+
 	return(1);
 }
 
 
+/* ARGSUSED */
 static int
 termp_bold_post(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -408,6 +590,7 @@ termp_bold_post(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_under_pre(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -418,6 +601,7 @@ termp_under_pre(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_bold_pre(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -428,6 +612,7 @@ termp_bold_pre(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_ns_pre(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -438,6 +623,7 @@ termp_ns_pre(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_pp_pre(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -448,6 +634,7 @@ termp_pp_pre(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_under_post(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -458,6 +645,7 @@ termp_under_post(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_nd_pre(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -468,6 +656,7 @@ termp_nd_pre(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_bl_post(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -484,6 +673,7 @@ termp_bl_post(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_op_post(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -501,6 +691,7 @@ termp_op_post(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_sh_post(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -513,7 +704,7 @@ termp_sh_post(struct termp *p, const struct mdoc_meta *meta,
 		break;
 	case (MDOC_BODY):
 		newln(p);
-		(p->indent)--;
+		p->offset -= 4;
 		break;
 	default:
 		break;
@@ -522,6 +713,7 @@ termp_sh_post(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_sh_pre(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -533,7 +725,7 @@ termp_sh_pre(struct termp *p, const struct mdoc_meta *meta,
 		p->flags |= TERMP_BOLD;
 		break;
 	case (MDOC_BODY):
-		(p->indent)++;
+		p->offset += 4;
 		break;
 	default:
 		break;
@@ -542,6 +734,7 @@ termp_sh_pre(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_op_pre(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -559,6 +752,7 @@ termp_op_pre(struct termp *p, const struct mdoc_meta *meta,
 }
 
 
+/* ARGSUSED */
 static int
 termp_fl_pre(struct termp *p, const struct mdoc_meta *meta,
 		const struct mdoc_node *node)
@@ -630,27 +824,27 @@ termprint_footer(struct termp *p, const struct mdoc_meta *meta)
 	char		*buf, *os;
 	size_t		 sz, osz, ssz, i;
 
-	if (NULL == (buf = malloc(p->maxvisible)))
+	if (NULL == (buf = malloc(p->rmargin)))
 		err(1, "malloc");
-	if (NULL == (os = malloc(p->maxvisible)))
+	if (NULL == (os = malloc(p->rmargin)))
 		err(1, "malloc");
 
 	tm = localtime(&meta->date);
-	if (NULL == strftime(buf, p->maxvisible, "%B %d, %Y", tm))
+	if (NULL == strftime(buf, p->rmargin, "%B %d, %Y", tm))
 		err(1, "strftime");
 
-	osz = strlcpy(os, meta->os, p->maxvisible);
+	osz = strlcpy(os, meta->os, p->rmargin);
 
 	sz = strlen(buf);
 	ssz = sz + osz + 1;
 
-	if (ssz > p->maxvisible) {
-		ssz -= p->maxvisible;
+	if (ssz > p->rmargin) {
+		ssz -= p->rmargin;
 		assert(ssz <= osz);
 		os[osz - ssz] = 0;
 		ssz = 1;
 	} else
-		ssz = p->maxvisible - ssz + 1;
+		ssz = p->rmargin - ssz + 1;
 
 	printf("\n");
 	printf("%s", os);
@@ -671,9 +865,9 @@ termprint_header(struct termp *p, const struct mdoc_meta *meta)
 	char		*msec, *buf, *title, *pp;
 	size_t		 ssz, tsz, ttsz, i;;
 
-	if (NULL == (buf = malloc(p->maxvisible)))
+	if (NULL == (buf = malloc(p->rmargin)))
 		err(1, "malloc");
-	if (NULL == (title = malloc(p->maxvisible)))
+	if (NULL == (title = malloc(p->rmargin)))
 		err(1, "malloc");
 
 	if (NULL == (pp = mdoc_vol2a(meta->vol)))
@@ -708,27 +902,27 @@ termprint_header(struct termp *p, const struct mdoc_meta *meta)
 		}
 	assert(pp);
 
-	tsz = strlcpy(buf, pp, p->maxvisible);
-	assert(tsz < p->maxvisible);
+	tsz = strlcpy(buf, pp, p->rmargin);
+	assert(tsz < p->rmargin);
 
 	if ((pp = mdoc_arch2a(meta->arch))) {
-		tsz = strlcat(buf, " (", p->maxvisible);
-		assert(tsz < p->maxvisible);
-		tsz = strlcat(buf, pp, p->maxvisible);
-		assert(tsz < p->maxvisible);
-		tsz = strlcat(buf, ")", p->maxvisible);
-		assert(tsz < p->maxvisible);
+		tsz = strlcat(buf, " (", p->rmargin);
+		assert(tsz < p->rmargin);
+		tsz = strlcat(buf, pp, p->rmargin);
+		assert(tsz < p->rmargin);
+		tsz = strlcat(buf, ")", p->rmargin);
+		assert(tsz < p->rmargin);
 	}
 
-	ttsz = strlcpy(title, meta->title, p->maxvisible);
+	ttsz = strlcpy(title, meta->title, p->rmargin);
 
 	if (NULL == (msec = mdoc_msec2a(meta->msec)))
 		msec = "";
 
 	ssz = (2 * (ttsz + 2 + strlen(msec))) + tsz + 2;
 
-	if (ssz > p->maxvisible) {
-		if ((ssz -= p->maxvisible) % 2)
+	if (ssz > p->rmargin) {
+		if ((ssz -= p->rmargin) % 2)
 			ssz++;
 		ssz /= 2;
 	
@@ -736,7 +930,7 @@ termprint_header(struct termp *p, const struct mdoc_meta *meta)
 		title[ttsz - ssz] = 0;
 		ssz = 1;
 	} else
-		ssz = ((p->maxvisible - ssz) / 2) + 1;
+		ssz = ((p->rmargin - ssz) / 2) + 1;
 
 	printf("%s(%s)", title, msec);
 
@@ -765,9 +959,10 @@ termprint(const struct mdoc_node *node,
 	if (ERR == setupterm(NULL, STDOUT_FILENO, NULL))
 		return(0);
 
-	p.maxvisible = columns < 60 ? 60 : (size_t)columns;
+	p.maxrmargin = columns < 60 ? 60 : (size_t)columns;
+	p.rmargin = p.maxrmargin;
 	p.maxcols = 1024;
-	p.indent = p.col = 0;
+	p.offset = p.col = 0;
 	p.flags = TERMP_NOSPACE;
 
 	if (NULL == (p.buf = malloc(p.maxcols)))