===================================================================
RCS file: /cvs/mandoc/term_ps.c,v
retrieving revision 1.1
retrieving revision 1.23
diff -u -p -r1.1 -r1.23
--- mandoc/term_ps.c	2010/06/08 13:22:37	1.1
+++ mandoc/term_ps.c	2010/06/30 15:05:02	1.23
@@ -1,6 +1,6 @@
-/*	$Id: term_ps.c,v 1.1 2010/06/08 13:22:37 kristaps Exp $ */
+/*	$Id: term_ps.c,v 1.23 2010/06/30 15:05:02 kristaps Exp $ */
 /*
- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -18,21 +18,432 @@
 #include "config.h"
 #endif
 
+#include <sys/param.h>
+
+#include <assert.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <time.h>
 
 #include "out.h"
 #include "main.h"
 #include "term.h"
 
+/* Convert PostScript point "x" to an AFM unit. */
+#define	PNT2AFM(p, x) \
+	(size_t)((double)(x) * (1000.0 / (double)(p)->engine.ps.scale))
+
+/* Convert an AFM unit "x" to a PostScript points */
+#define	AFM2PNT(p, x) \
+	(size_t)((double)(x) / (1000.0 / (double)(p)->engine.ps.scale))
+
+struct	glyph {
+	int		  wx; /* WX in AFM */
+};
+
+struct	font {
+	const char	 *name; /* FontName in AFM */
+#define	MAXCHAR		  95 /* total characters we can handle */
+	struct glyph	  gly[MAXCHAR]; /* glyph metrics */
+};
+
+/*
+ * We define, for the time being, three fonts: bold, oblique/italic, and
+ * normal (roman).  The following table hard-codes the font metrics for
+ * ASCII, i.e., 32--127.
+ */
+
+static	const struct font fonts[TERMFONT__MAX] = {
+	{ "CharterBT-Roman", {
+		{  278 },
+		{  338 },
+		{  331 },
+		{  745 },
+		{  556 },
+		{  852 },
+		{  704 },
+		{  201 },
+		{  417 },
+		{  417 },
+		{  500 },
+		{  833 },
+		{  278 },
+		{  319 },
+		{  278 },
+		{  481 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  319 },
+		{  319 },
+		{  833 },
+		{  833 },
+		{  833 },
+		{  486 },
+		{  942 },
+		{  639 },
+		{  604 },
+		{  632 },
+		{  693 },
+		{  576 },
+		{  537 },
+		{  694 },
+		{  738 },
+		{  324 },
+		{  444 },
+		{  611 },
+		{  520 },
+		{  866 },
+		{  713 },
+		{  731 },
+		{  558 },
+		{  731 },
+		{  646 },
+		{  556 },
+		{  597 },
+		{  694 },
+		{  618 },
+		{  928 },
+		{  600 },
+		{  586 },
+		{  586 },
+		{  421 },
+		{  481 },
+		{  421 },
+		{ 1000 },
+		{  500 },
+		{  201 },
+		{  507 },
+		{  539 },
+		{  446 },
+		{  565 },
+		{  491 },
+		{  321 },
+		{  523 },
+		{  564 },
+		{  280 },
+		{  266 },
+		{  517 },
+		{  282 },
+		{  843 },
+		{  568 },
+		{  539 },
+		{  551 },
+		{  531 },
+		{  382 },
+		{  400 },
+		{  334 },
+		{  569 },
+		{  494 },
+		{  771 },
+		{  503 },
+		{  495 },
+		{  468 },
+		{  486 },
+		{  500 },
+		{  486 },
+		{  833 },
+	} },
+	{ "CharterBT-Bold", {
+		{  291 },
+		{  340 },
+		{  339 },
+		{  736 },
+		{  581 },
+		{  888 },
+		{  741 },
+		{  255 },
+		{  428 },
+		{  428 },
+		{  500 },
+		{  833 },
+		{  289 },
+		{  326 },
+		{  289 },
+		{  491 },
+		{  581 },
+		{  581 },
+		{  581 },
+		{  581 },
+		{  581 },
+		{  581 },
+		{  581 },
+		{  581 },
+		{  581 },
+		{  581 },
+		{  340 },
+		{  340 },
+		{  833 },
+		{  833 },
+		{  833 },
+		{  487 },
+		{  917 },
+		{  651 },
+		{  628 },
+		{  638 },
+		{  716 },
+		{  596 },
+		{  552 },
+		{  710 },
+		{  760 },
+		{  354 },
+		{  465 },
+		{  650 },
+		{  543 },
+		{  883 },
+		{  727 },
+		{  752 },
+		{  587 },
+		{  752 },
+		{  671 },
+		{  568 },
+		{  603 },
+		{  705 },
+		{  635 },
+		{  946 },
+		{  637 },
+		{  610 },
+		{  592 },
+		{  443 },
+		{  491 },
+		{  443 },
+		{ 1000 },
+		{  500 },
+		{  255 },
+		{  544 },
+		{  577 },
+		{  476 },
+		{  596 },
+		{  524 },
+		{  341 },
+		{  551 },
+		{  597 },
+		{  305 },
+		{  297 },
+		{  553 },
+		{  304 },
+		{  892 },
+		{  605 },
+		{  577 },
+		{  591 },
+		{  575 },
+		{  421 },
+		{  447 },
+		{  358 },
+		{  600 },
+		{  513 },
+		{  799 },
+		{  531 },
+		{  515 },
+		{  495 },
+		{  493 },
+		{  500 },
+		{  493 },
+		{  833 },
+	} },
+	{ "CharterBT-Italic", {
+		{  278 },
+		{  338 },
+		{  331 },
+		{  745 },
+		{  556 },
+		{  852 },
+		{  704 },
+		{  201 },
+		{  419 },
+		{  419 },
+		{  500 },
+		{  833 },
+		{  278 },
+		{  319 },
+		{  278 },
+		{  481 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  556 },
+		{  319 },
+		{  319 },
+		{  833 },
+		{  833 },
+		{  833 },
+		{  486 },
+		{  942 },
+		{  606 },
+		{  588 },
+		{  604 },
+		{  671 },
+		{  546 },
+		{  509 },
+		{  664 },
+		{  712 },
+		{  312 },
+		{  447 },
+		{  625 },
+		{  498 },
+		{  839 },
+		{  683 },
+		{  708 },
+		{  542 },
+		{  708 },
+		{  602 },
+		{  537 },
+		{  565 },
+		{  664 },
+		{  590 },
+		{  898 },
+		{  569 },
+		{  562 },
+		{  556 },
+		{  421 },
+		{  481 },
+		{  421 },
+		{ 1000 },
+		{  500 },
+		{  201 },
+		{  525 },
+		{  507 },
+		{  394 },
+		{  523 },
+		{  424 },
+		{  292 },
+		{  481 },
+		{  551 },
+		{  287 },
+		{  269 },
+		{  514 },
+		{  275 },
+		{  815 },
+		{  556 },
+		{  502 },
+		{  516 },
+		{  512 },
+		{  398 },
+		{  370 },
+		{  333 },
+		{  553 },
+		{  454 },
+		{  713 },
+		{  477 },
+		{  475 },
+		{  440 },
+		{  486 },
+		{  500 },
+		{  486 },
+		{  833 },
+	} },
+};
+
+/* 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) > \
+			(p)->engine.ps.psmargsz) { \
+		(p)->engine.ps.psmargsz += /* CONSTCOND */ \
+			MAX(PS_BUFSLOP, (sz)); \
+		(p)->engine.ps.psmarg = realloc \
+			((p)->engine.ps.psmarg,  \
+			 (p)->engine.ps.psmargsz); \
+		if (NULL == (p)->engine.ps.psmarg) { \
+			perror(NULL); \
+			exit(EXIT_FAILURE); \
+		} \
+	} while (/* CONSTCOND */ 0)
+
+
+static	double		  ps_hspan(const struct termp *,
+				const struct roffsu *);
+static	size_t		  ps_width(const struct termp *, char);
+static	void		  ps_advance(struct termp *, size_t);
+static	void		  ps_begin(struct termp *);
+static	void		  ps_end(struct termp *);
+static	void		  ps_endline(struct termp *);
+static	void		  ps_fclose(struct termp *);
+static	void		  ps_letter(struct termp *, char);
+static	void		  ps_pclose(struct termp *);
+static	void		  ps_pletter(struct termp *, int);
+static	void		  ps_printf(struct termp *, const char *, ...);
+static	void		  ps_putchar(struct termp *, char);
+static	void		  ps_setfont(struct termp *, enum termfont);
+
+
 void *
-ps_alloc(void)
+ps_alloc(char *outopts)
 {
 	struct termp	*p;
+	size_t		 pagex, pagey, margin, lineheight;
+	const char	*toks[2];
+	const char	*paper;
+	char		*v;
 
 	if (NULL == (p = term_alloc(TERMENC_ASCII)))
 		return(NULL);
 
+	p->advance = ps_advance;
+	p->begin = ps_begin;
+	p->end = ps_end;
+	p->endline = ps_endline;
+	p->hspan = ps_hspan;
+	p->letter = ps_letter;
 	p->type = TERMTYPE_PS;
+	p->width = ps_width;
+	
+	p->engine.ps.scale = 10;
+
+	toks[0] = "paper";
+	toks[1] = NULL;
+
+	paper = "letter";
+
+	while (outopts && *outopts)
+		switch (getsubopt(&outopts, UNCONST(toks), &v)) {
+		case (0):
+			paper = v;
+			break;
+		default:
+			break;
+		}
+
+	margin = PNT2AFM(p, 72);
+	lineheight = PNT2AFM(p, 12);
+
+	if (0 == strcasecmp(paper, "a4")) {
+		pagex = PNT2AFM(p, 595);
+		pagey = PNT2AFM(p, 842);
+	} else {
+		pagex = PNT2AFM(p, 612);
+		pagey = PNT2AFM(p, 792);
+	}
+
+	assert(margin * 2 < pagex);
+	assert(margin * 2 < pagey);
+
+	p->engine.ps.width = pagex;
+	p->engine.ps.height = pagey;
+	p->engine.ps.header = pagey - (margin / 2);
+	p->engine.ps.top = pagey - margin;
+	p->engine.ps.footer = (margin / 2);
+	p->engine.ps.bottom = margin;
+	p->engine.ps.left = margin;
+	p->engine.ps.lineheight = lineheight;
+
+	p->defrmargin = pagex - (margin * 2);
 	return(p);
 }
 
@@ -40,6 +451,435 @@ ps_alloc(void)
 void
 ps_free(void *arg)
 {
+	struct termp	*p;
 
-	term_free((struct termp *)arg);
+	p = (struct termp *)arg;
+
+	if (p->engine.ps.psmarg)
+		free(p->engine.ps.psmarg);
+
+	term_free(p);
 }
+
+
+static void
+ps_printf(struct termp *p, const char *fmt, ...)
+{
+	va_list		 ap;
+	int		 pos;
+
+	va_start(ap, fmt);
+
+	/*
+	 * If we're running in regular mode, then pipe directly into
+	 * vprintf().  If we're processing margins, then push the data
+	 * into our growable margin buffer.
+	 */
+
+	if ( ! (PS_MARGINS & p->engine.ps.psstate)) {
+		vprintf(fmt, ap);
+		va_end(ap);
+		return;
+	}
+
+	/* 
+	 * XXX: I assume that the in-margin print won't exceed
+	 * PS_BUFSLOP (128 bytes), which is reasonable but still an
+	 * assumption that will cause pukeage if it's not the case.
+	 */
+
+	PS_GROWBUF(p, PS_BUFSLOP);
+
+	pos = (int)p->engine.ps.psmargcur;
+	vsnprintf(&p->engine.ps.psmarg[pos], PS_BUFSLOP, fmt, ap);
+	p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg);
+
+	va_end(ap);
+}
+
+
+static void
+ps_putchar(struct termp *p, char c)
+{
+	int		 pos;
+
+	/* See ps_printf(). */
+
+	if ( ! (PS_MARGINS & p->engine.ps.psstate)) {
+		putchar(c);
+		return;
+	}
+
+	PS_GROWBUF(p, 2);
+
+	pos = (int)p->engine.ps.psmargcur++;
+	p->engine.ps.psmarg[pos++] = c;
+	p->engine.ps.psmarg[pos] = '\0';
+}
+
+
+/* ARGSUSED */
+static void
+ps_end(struct termp *p)
+{
+
+	/*
+	 * At the end of the file, do one last showpage.  This is the
+	 * same behaviour as groff(1) and works for multiple pages as
+	 * well as just one.
+	 */
+
+	assert(0 == p->engine.ps.psstate);
+	assert('\0' == p->engine.ps.last);
+	assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]);
+	printf("%s", p->engine.ps.psmarg);
+	p->engine.ps.pages++;
+	printf("showpage\n");
+
+	printf("%%%%Trailer\n");
+	printf("%%%%Pages: %zu\n", p->engine.ps.pages);
+	printf("%%%%EOF\n");
+}
+
+
+static void
+ps_begin(struct termp *p)
+{
+	time_t		 t;
+	int		 i;
+
+	/* 
+	 * Print margins into margin buffer.  Nothing gets output to the
+	 * screen yet, so we don't need to initialise the primary state.
+	 */
+
+	if (p->engine.ps.psmarg) {
+		assert(p->engine.ps.psmargsz);
+		p->engine.ps.psmarg[0] = '\0';
+	}
+
+	p->engine.ps.psmargcur = 0;
+	p->engine.ps.psstate = PS_MARGINS;
+	p->engine.ps.pscol = p->engine.ps.left;
+	p->engine.ps.psrow = p->engine.ps.header;
+
+	ps_setfont(p, TERMFONT_NONE);
+
+	(*p->headf)(p, p->argf);
+	(*p->endline)(p);
+
+	p->engine.ps.pscol = p->engine.ps.left;
+	p->engine.ps.psrow = p->engine.ps.footer;
+
+	(*p->footf)(p, p->argf);
+	(*p->endline)(p);
+
+	p->engine.ps.psstate &= ~PS_MARGINS;
+
+	assert(0 == p->engine.ps.psstate);
+	assert(p->engine.ps.psmarg);
+	assert('\0' != p->engine.ps.psmarg[0]);
+
+	/* 
+	 * Print header and initialise page state.  Following this,
+	 * stuff gets printed to the screen, so make sure we're sane.
+	 */
+
+	t = time(NULL);
+
+	printf("%%!PS-Adobe-3.0\n");
+	printf("%%%%Creator: mandoc-%s\n", VERSION);
+	printf("%%%%CreationDate: %s", ctime(&t));
+	printf("%%%%DocumentData: Clean7Bit\n");
+	printf("%%%%Orientation: Portrait\n");
+	printf("%%%%Pages: (atend)\n");
+	printf("%%%%PageOrder: Ascend\n");
+	printf("%%%%DocumentMedia: Default %zu %zu 0 () ()\n",
+			AFM2PNT(p, p->engine.ps.width),
+			AFM2PNT(p, p->engine.ps.height));
+	printf("%%%%DocumentNeededResources: font");
+	for (i = 0; i < (int)TERMFONT__MAX; i++)
+		printf(" %s", fonts[i].name);
+	printf("\n%%%%EndComments\n");
+
+	printf("%%%%Page: %zu %zu\n", 
+			p->engine.ps.pages + 1, 
+			p->engine.ps.pages + 1);
+
+	ps_setfont(p, TERMFONT_NONE);
+	p->engine.ps.pscol = p->engine.ps.left;
+	p->engine.ps.psrow = p->engine.ps.top;
+}
+
+
+static void
+ps_pletter(struct termp *p, int c)
+{
+	int		 f;
+	
+	/*
+	 * If we're not in a PostScript "word" context, then open one
+	 * now at the current cursor.
+	 */
+
+	if ( ! (PS_INLINE & p->engine.ps.psstate)) {
+		ps_printf(p, "%zu %zu moveto\n(", 
+				AFM2PNT(p, p->engine.ps.pscol),
+				AFM2PNT(p, p->engine.ps.psrow));
+		p->engine.ps.psstate |= PS_INLINE;
+	}
+
+	/*
+	 * We need to escape these characters as per the PostScript
+	 * specification.  We would also escape non-graphable characters
+	 * (like tabs), but none of them would get to this point and
+	 * it's superfluous to abort() on them.
+	 */
+
+	switch (c) {
+	case ('('):
+		/* FALLTHROUGH */
+	case (')'):
+		/* FALLTHROUGH */
+	case ('\\'):
+		ps_putchar(p, '\\');
+		break;
+	default:
+		break;
+	}
+
+	/* Write the character and adjust where we are on the page. */
+
+	f = (int)p->engine.ps.lastf;
+
+	if (c <= 32 || (c - 32 > MAXCHAR)) {
+		ps_putchar(p, ' ');
+		p->engine.ps.pscol += fonts[f].gly[0].wx;
+		return;
+	} 
+
+	ps_putchar(p, c);
+	c -= 32;
+	p->engine.ps.pscol += fonts[f].gly[c].wx;
+}
+
+
+static void
+ps_pclose(struct termp *p)
+{
+
+	/* 
+	 * Spit out that we're exiting a word context (this is a
+	 * "partial close" because we don't check the last-char buffer
+	 * or anything).
+	 */
+
+	if ( ! (PS_INLINE & p->engine.ps.psstate))
+		return;
+	
+	ps_printf(p, ") show\n");
+	p->engine.ps.psstate &= ~PS_INLINE;
+}
+
+
+static void
+ps_fclose(struct termp *p)
+{
+
+	/*
+	 * Strong closure: if we have a last-char, spit it out after
+	 * checking that we're in the right font mode.  This will of
+	 * course open a new scope, if applicable.
+	 *
+	 * Following this, close out any scope that's open.
+	 */
+
+	if ('\0' != p->engine.ps.last) {
+		if (p->engine.ps.lastf != TERMFONT_NONE) {
+			ps_pclose(p);
+			ps_setfont(p, TERMFONT_NONE);
+		}
+		ps_pletter(p, p->engine.ps.last);
+		p->engine.ps.last = '\0';
+	}
+
+	if ( ! (PS_INLINE & p->engine.ps.psstate))
+		return;
+
+	ps_pclose(p);
+}
+
+
+static void
+ps_letter(struct termp *p, char c)
+{
+	char		cc;
+
+	/*
+	 * State machine dictates whether to buffer the last character
+	 * or not.  Basically, encoded words are detected by checking if
+	 * we're an "8" and switching on the buffer.  Then we put "8" in
+	 * our buffer, and on the next charater, flush both character
+	 * and buffer.  Thus, "regular" words are detected by having a
+	 * regular character and a regular buffer character.
+	 */
+
+	if ('\0' == p->engine.ps.last) {
+		assert(8 != c);
+		p->engine.ps.last = c;
+		return;
+	} else if (8 == p->engine.ps.last) {
+		assert(8 != c);
+		p->engine.ps.last = '\0';
+	} else if (8 == c) {
+		assert(8 != p->engine.ps.last);
+		if ('_' == p->engine.ps.last) {
+			if (p->engine.ps.lastf != TERMFONT_UNDER) {
+				ps_pclose(p);
+				ps_setfont(p, TERMFONT_UNDER);
+			}
+		} else if (p->engine.ps.lastf != TERMFONT_BOLD) {
+			ps_pclose(p);
+			ps_setfont(p, TERMFONT_BOLD);
+		}
+		p->engine.ps.last = c;
+		return;
+	} else {
+		if (p->engine.ps.lastf != TERMFONT_NONE) {
+			ps_pclose(p);
+			ps_setfont(p, TERMFONT_NONE);
+		}
+		cc = p->engine.ps.last;
+		p->engine.ps.last = c;
+		c = cc;
+	}
+
+	ps_pletter(p, c);
+}
+
+
+static void
+ps_advance(struct termp *p, size_t len)
+{
+
+	/*
+	 * Advance some spaces.  This can probably be made smarter,
+	 * i.e., to have multiple space-separated words in the same
+	 * scope, but this is easier:  just close out the current scope
+	 * and readjust our column settings.
+	 */
+
+	ps_fclose(p);
+	p->engine.ps.pscol += len;
+}
+
+
+static void
+ps_endline(struct termp *p)
+{
+
+	/* Close out any scopes we have open: we're at eoln. */
+
+	ps_fclose(p);
+
+	/*
+	 * If we're in the margin, don't try to recalculate our current
+	 * row.  XXX: if the column tries to be fancy with multiple
+	 * lines, we'll do nasty stuff. 
+	 */
+
+	if (PS_MARGINS & p->engine.ps.psstate)
+		return;
+
+	/*
+	 * Put us down a line.  If we're at the page bottom, spit out a
+	 * showpage and restart our row.
+	 */
+
+	p->engine.ps.pscol = p->engine.ps.left;
+	if (p->engine.ps.psrow >= p->engine.ps.lineheight + 
+			p->engine.ps.bottom) {
+		p->engine.ps.psrow -= p->engine.ps.lineheight;
+		return;
+	}
+
+	assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]);
+	printf("%s", p->engine.ps.psmarg);
+	printf("showpage\n");
+	p->engine.ps.pages++;
+	printf("%%%%Page: %zu %zu\n", 
+			p->engine.ps.pages + 1, 
+			p->engine.ps.pages + 1);
+	p->engine.ps.psrow = p->engine.ps.top;
+}
+
+
+static void
+ps_setfont(struct termp *p, enum termfont f)
+{
+
+	assert(f < TERMFONT__MAX);
+	ps_printf(p, "/%s %zu selectfont\n", 
+			fonts[(int)f].name, p->engine.ps.scale);
+	p->engine.ps.lastf = f;
+}
+
+
+/* ARGSUSED */
+static size_t
+ps_width(const struct termp *p, char c)
+{
+
+	if (c <= 32 || c - 32 >= MAXCHAR)
+		return(fonts[(int)TERMFONT_NONE].gly[0].wx);
+
+	c -= 32;
+	return(fonts[(int)TERMFONT_NONE].gly[(int)c].wx);
+}
+
+
+static double
+ps_hspan(const struct termp *p, const struct roffsu *su)
+{
+	double		 r;
+	
+	/*
+	 * All of these measurements are derived by converting from the
+	 * native measurement to AFM units.
+	 */
+
+	switch (su->unit) {
+	case (SCALE_CM):
+		r = PNT2AFM(p, su->scale * 28.34);
+		break;
+	case (SCALE_IN):
+		r = PNT2AFM(p, su->scale * 72);
+		break;
+	case (SCALE_PC):
+		r = PNT2AFM(p, su->scale * 12);
+		break;
+	case (SCALE_PT):
+		r = PNT2AFM(p, su->scale * 100);
+		break;
+	case (SCALE_EM):
+		r = su->scale * 
+			fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
+		break;
+	case (SCALE_MM):
+		r = PNT2AFM(p, su->scale * 2.834);
+		break;
+	case (SCALE_EN):
+		r = su->scale * 
+			fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
+		break;
+	case (SCALE_VS):
+		r = su->scale * p->engine.ps.lineheight;
+		break;
+	default:
+		r = su->scale;
+		break;
+	}
+
+	return(r);
+}
+