File: [cvsweb.bsd.lv] / mandoc / term_ps.c (download)
Revision 1.47, Mon Mar 7 01:58:24 2011 UTC (13 years, 1 month ago) by schwarze
Branch: MAIN
Changes since 1.46: +1 -3 lines
Do not leak information about the software used
into PostScript and PDF documents behind the user's back.
Joerg Sonnenberger pointed out that almost all software
creating PostScript and PDF documents does so, even on OpenBSD,
but that doesn't make the leakage much better in my book.
According to all standards i could find, this information is optional.
Issue originally reported by deraadt@; "commit!" kristaps@.
|
/* $Id: term_ps.c,v 1.47 2011/03/07 01:58:24 schwarze Exp $ */
/*
* Copyright (c) 2010 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
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <assert.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "mandoc.h"
#include "out.h"
#include "main.h"
#include "term.h"
/* Convert PostScript point "x" to an AFM unit. */
#define PNT2AFM(p, x) /* LINTED */ \
(size_t)((double)(x) * (1000.0 / (double)(p)->engine.ps.scale))
/* Convert an AFM unit "x" to a PostScript points */
#define AFM2PNT(p, x) /* LINTED */ \
((double)(x) / (1000.0 / (double)(p)->engine.ps.scale))
struct glyph {
unsigned short 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] = {
{ "Times-Roman", {
{ 250 },
{ 333 },
{ 408 },
{ 500 },
{ 500 },
{ 833 },
{ 778 },
{ 333 },
{ 333 },
{ 333 },
{ 500 },
{ 564 },
{ 250 },
{ 333 },
{ 250 },
{ 278 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 278 },
{ 278 },
{ 564 },
{ 564 },
{ 564 },
{ 444 },
{ 921 },
{ 722 },
{ 667 },
{ 667 },
{ 722 },
{ 611 },
{ 556 },
{ 722 },
{ 722 },
{ 333 },
{ 389 },
{ 722 },
{ 611 },
{ 889 },
{ 722 },
{ 722 },
{ 556 },
{ 722 },
{ 667 },
{ 556 },
{ 611 },
{ 722 },
{ 722 },
{ 944 },
{ 722 },
{ 722 },
{ 611 },
{ 333 },
{ 278 },
{ 333 },
{ 469 },
{ 500 },
{ 333 },
{ 444 },
{ 500 },
{ 444 },
{ 500},
{ 444},
{ 333},
{ 500},
{ 500},
{ 278},
{ 278},
{ 500},
{ 278},
{ 778},
{ 500},
{ 500},
{ 500},
{ 500},
{ 333},
{ 389},
{ 278},
{ 500},
{ 500},
{ 722},
{ 500},
{ 500},
{ 444},
{ 480},
{ 200},
{ 480},
{ 541},
} },
{ "Times-Bold", {
{ 250 },
{ 333 },
{ 555 },
{ 500 },
{ 500 },
{ 1000 },
{ 833 },
{ 333 },
{ 333 },
{ 333 },
{ 500 },
{ 570 },
{ 250 },
{ 333 },
{ 250 },
{ 278 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 333 },
{ 333 },
{ 570 },
{ 570 },
{ 570 },
{ 500 },
{ 930 },
{ 722 },
{ 667 },
{ 722 },
{ 722 },
{ 667 },
{ 611 },
{ 778 },
{ 778 },
{ 389 },
{ 500 },
{ 778 },
{ 667 },
{ 944 },
{ 722 },
{ 778 },
{ 611 },
{ 778 },
{ 722 },
{ 556 },
{ 667 },
{ 722 },
{ 722 },
{ 1000 },
{ 722 },
{ 722 },
{ 667 },
{ 333 },
{ 278 },
{ 333 },
{ 581 },
{ 500 },
{ 333 },
{ 500 },
{ 556 },
{ 444 },
{ 556 },
{ 444 },
{ 333 },
{ 500 },
{ 556 },
{ 278 },
{ 333 },
{ 556 },
{ 278 },
{ 833 },
{ 556 },
{ 500 },
{ 556 },
{ 556 },
{ 444 },
{ 389 },
{ 333 },
{ 556 },
{ 500 },
{ 722 },
{ 500 },
{ 500 },
{ 444 },
{ 394 },
{ 220 },
{ 394 },
{ 520 },
} },
{ "Times-Italic", {
{ 250 },
{ 333 },
{ 420 },
{ 500 },
{ 500 },
{ 833 },
{ 778 },
{ 333 },
{ 333 },
{ 333 },
{ 500 },
{ 675 },
{ 250 },
{ 333 },
{ 250 },
{ 278 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 333 },
{ 333 },
{ 675 },
{ 675 },
{ 675 },
{ 500 },
{ 920 },
{ 611 },
{ 611 },
{ 667 },
{ 722 },
{ 611 },
{ 611 },
{ 722 },
{ 722 },
{ 333 },
{ 444 },
{ 667 },
{ 556 },
{ 833 },
{ 667 },
{ 722 },
{ 611 },
{ 722 },
{ 611 },
{ 500 },
{ 556 },
{ 722 },
{ 611 },
{ 833 },
{ 611 },
{ 556 },
{ 556 },
{ 389 },
{ 278 },
{ 389 },
{ 422 },
{ 500 },
{ 333 },
{ 500 },
{ 500 },
{ 444 },
{ 500 },
{ 444 },
{ 278 },
{ 500 },
{ 500 },
{ 278 },
{ 278 },
{ 444 },
{ 278 },
{ 722 },
{ 500 },
{ 500 },
{ 500 },
{ 500 },
{ 389 },
{ 389 },
{ 278 },
{ 500 },
{ 444 },
{ 667 },
{ 444 },
{ 444 },
{ 389 },
{ 400 },
{ 275 },
{ 400 },
{ 541 },
} },
};
/* These work the buffer used by the header and footer. */
#define PS_BUFSLOP 128
static void
ps_growbuf(struct termp *p, size_t sz)
{
if (p->engine.ps.psmargcur + sz <= p->engine.ps.psmargsz)
return;
if (sz < PS_BUFSLOP)
sz = PS_BUFSLOP;
p->engine.ps.psmargsz += sz;
p->engine.ps.psmarg = realloc
(p->engine.ps.psmarg,
p->engine.ps.psmargsz);
if (NULL == p->engine.ps.psmarg) {
perror(NULL);
exit((int)MANDOCLEVEL_SYSERR);
}
}
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_closepage(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);
static struct termp *pspdf_alloc(char *);
static void pdf_obj(struct termp *, size_t);
void *
pdf_alloc(char *outopts)
{
struct termp *p;
if (NULL != (p = pspdf_alloc(outopts)))
p->type = TERMTYPE_PDF;
return(p);
}
void *
ps_alloc(char *outopts)
{
struct termp *p;
if (NULL != (p = pspdf_alloc(outopts)))
p->type = TERMTYPE_PS;
return(p);
}
static struct termp *
pspdf_alloc(char *outopts)
{
struct termp *p;
size_t pagex, pagey, marginx, marginy, lineheight;
const char *toks[2];
const char *pp;
char *v;
p = term_alloc(TERMENC_ASCII);
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->width = ps_width;
toks[0] = "paper";
toks[1] = NULL;
pp = NULL;
while (outopts && *outopts)
switch (getsubopt(&outopts, UNCONST(toks), &v)) {
case (0):
pp = v;
break;
default:
break;
}
/* Default to US letter (millimetres). */
pagex = 216;
pagey = 279;
/*
* The ISO-269 paper sizes can be calculated automatically, but
* it would require bringing in -lm for pow() and I'd rather not
* do that. So just do it the easy way for now. Since this
* only happens once, I'm not terribly concerned.
*/
if (pp && strcasecmp(pp, "letter")) {
if (0 == strcasecmp(pp, "a3")) {
pagex = 297;
pagey = 420;
} else if (0 == strcasecmp(pp, "a4")) {
pagex = 210;
pagey = 297;
} else if (0 == strcasecmp(pp, "a5")) {
pagex = 148;
pagey = 210;
} else if (0 == strcasecmp(pp, "legal")) {
pagex = 216;
pagey = 356;
} else if (2 != sscanf(pp, "%zux%zu", &pagex, &pagey))
fprintf(stderr, "%s: Unknown paper\n", pp);
} else if (NULL == pp)
pp = "letter";
/*
* This MUST be defined before any PNT2AFM or AFM2PNT
* calculations occur.
*/
p->engine.ps.scale = 11;
/* Remember millimetres -> AFM units. */
pagex = PNT2AFM(p, ((double)pagex * 2.834));
pagey = PNT2AFM(p, ((double)pagey * 2.834));
/* Margins are 1/9 the page x and y. */
marginx = /* LINTED */
(size_t)((double)pagex / 9.0);
marginy = /* LINTED */
(size_t)((double)pagey / 9.0);
/* Line-height is 1.4em. */
lineheight = PNT2AFM(p, ((double)p->engine.ps.scale * 1.4));
p->engine.ps.width = pagex;
p->engine.ps.height = pagey;
p->engine.ps.header = pagey - (marginy / 2) - (lineheight / 2);
p->engine.ps.top = pagey - marginy;
p->engine.ps.footer = (marginy / 2) - (lineheight / 2);
p->engine.ps.bottom = marginy;
p->engine.ps.left = marginx;
p->engine.ps.lineheight = lineheight;
p->defrmargin = pagex - (marginx * 2);
return(p);
}
void
pspdf_free(void *arg)
{
struct termp *p;
p = (struct termp *)arg;
if (p->engine.ps.psmarg)
free(p->engine.ps.psmarg);
if (p->engine.ps.pdfobjs)
free(p->engine.ps.pdfobjs);
term_free(p);
}
static void
ps_printf(struct termp *p, const char *fmt, ...)
{
va_list ap;
int pos, len;
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.flags)) {
len = vprintf(fmt, ap);
va_end(ap);
p->engine.ps.pdfbytes += /* LINTED */
len < 0 ? 0 : (size_t)len;
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;
len = vsnprintf(&p->engine.ps.psmarg[pos], PS_BUFSLOP, fmt, ap);
va_end(ap);
p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg);
}
static void
ps_putchar(struct termp *p, char c)
{
int pos;
/* See ps_printf(). */
if ( ! (PS_MARGINS & p->engine.ps.flags)) {
/* LINTED */
putchar(c);
p->engine.ps.pdfbytes++;
return;
}
ps_growbuf(p, 2);
pos = (int)p->engine.ps.psmargcur++;
p->engine.ps.psmarg[pos++] = c;
p->engine.ps.psmarg[pos] = '\0';
}
static void
pdf_obj(struct termp *p, size_t obj)
{
assert(obj > 0);
if ((obj - 1) >= p->engine.ps.pdfobjsz) {
p->engine.ps.pdfobjsz = obj + 128;
p->engine.ps.pdfobjs = realloc
(p->engine.ps.pdfobjs,
p->engine.ps.pdfobjsz * sizeof(size_t));
if (NULL == p->engine.ps.pdfobjs) {
perror(NULL);
exit((int)MANDOCLEVEL_SYSERR);
}
}
p->engine.ps.pdfobjs[(int)obj - 1] = p->engine.ps.pdfbytes;
ps_printf(p, "%zu 0 obj\n", obj);
}
static void
ps_closepage(struct termp *p)
{
int i;
size_t len, base;
/*
* Close out a page that we've already flushed to output. In
* PostScript, we simply note that the page must be showed. In
* PDF, we must now create the Length, Resource, and Page node
* for the page contents.
*/
assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]);
ps_printf(p, "%s", p->engine.ps.psmarg);
if (TERMTYPE_PS != p->type) {
ps_printf(p, "ET\n");
len = p->engine.ps.pdfbytes - p->engine.ps.pdflastpg;
base = p->engine.ps.pages * 4 + p->engine.ps.pdfbody;
ps_printf(p, "endstream\nendobj\n");
/* Length of content. */
pdf_obj(p, base + 1);
ps_printf(p, "%zu\nendobj\n", len);
/* Resource for content. */
pdf_obj(p, base + 2);
ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
ps_printf(p, "/Font <<\n");
for (i = 0; i < (int)TERMFONT__MAX; i++)
ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
ps_printf(p, ">>\n>>\n");
/* Page node. */
pdf_obj(p, base + 3);
ps_printf(p, "<<\n");
ps_printf(p, "/Type /Page\n");
ps_printf(p, "/Parent 2 0 R\n");
ps_printf(p, "/Resources %zu 0 R\n", base + 2);
ps_printf(p, "/Contents %zu 0 R\n", base);
ps_printf(p, ">>\nendobj\n");
} else
ps_printf(p, "showpage\n");
p->engine.ps.pages++;
p->engine.ps.psrow = p->engine.ps.top;
assert( ! (PS_NEWPAGE & p->engine.ps.flags));
p->engine.ps.flags |= PS_NEWPAGE;
}
/* ARGSUSED */
static void
ps_end(struct termp *p)
{
size_t i, xref, base;
/*
* 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.
*/
if ( ! (PS_NEWPAGE & p->engine.ps.flags)) {
assert(0 == p->engine.ps.flags);
assert('\0' == p->engine.ps.last);
ps_closepage(p);
}
if (TERMTYPE_PS == p->type) {
ps_printf(p, "%%%%Trailer\n");
ps_printf(p, "%%%%Pages: %zu\n", p->engine.ps.pages);
ps_printf(p, "%%%%EOF\n");
return;
}
pdf_obj(p, 2);
ps_printf(p, "<<\n/Type /Pages\n");
ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
(size_t)AFM2PNT(p, p->engine.ps.width),
(size_t)AFM2PNT(p, p->engine.ps.height));
ps_printf(p, "/Count %zu\n", p->engine.ps.pages);
ps_printf(p, "/Kids [");
for (i = 0; i < p->engine.ps.pages; i++)
ps_printf(p, " %zu 0 R", i * 4 +
p->engine.ps.pdfbody + 3);
base = (p->engine.ps.pages - 1) * 4 +
p->engine.ps.pdfbody + 4;
ps_printf(p, "]\n>>\nendobj\n");
pdf_obj(p, base);
ps_printf(p, "<<\n");
ps_printf(p, "/Type /Catalog\n");
ps_printf(p, "/Pages 2 0 R\n");
ps_printf(p, ">>\n");
xref = p->engine.ps.pdfbytes;
ps_printf(p, "xref\n");
ps_printf(p, "0 %zu\n", base + 1);
ps_printf(p, "0000000000 65535 f \n");
for (i = 0; i < base; i++)
ps_printf(p, "%.10zu 00000 n \n",
p->engine.ps.pdfobjs[(int)i]);
ps_printf(p, "trailer\n");
ps_printf(p, "<<\n");
ps_printf(p, "/Size %zu\n", base + 1);
ps_printf(p, "/Root %zu 0 R\n", base);
ps_printf(p, "/Info 1 0 R\n");
ps_printf(p, ">>\n");
ps_printf(p, "startxref\n");
ps_printf(p, "%zu\n", xref);
ps_printf(p, "%%%%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.pdfbytes = 0;*/
p->engine.ps.psmargcur = 0;
p->engine.ps.flags = 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.flags &= ~PS_MARGINS;
assert(0 == p->engine.ps.flags);
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);
if (TERMTYPE_PS == p->type) {
ps_printf(p, "%%!PS-Adobe-3.0\n");
ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
ps_printf(p, "%%%%Orientation: Portrait\n");
ps_printf(p, "%%%%Pages: (atend)\n");
ps_printf(p, "%%%%PageOrder: Ascend\n");
ps_printf(p, "%%%%DocumentMedia: "
"Default %zu %zu 0 () ()\n",
(size_t)AFM2PNT(p, p->engine.ps.width),
(size_t)AFM2PNT(p, p->engine.ps.height));
ps_printf(p, "%%%%DocumentNeededResources: font");
for (i = 0; i < (int)TERMFONT__MAX; i++)
ps_printf(p, " %s", fonts[i].name);
ps_printf(p, "\n%%%%EndComments\n");
} else {
ps_printf(p, "%%PDF-1.1\n");
pdf_obj(p, 1);
ps_printf(p, "<<\n");
ps_printf(p, ">>\n");
ps_printf(p, "endobj\n");
for (i = 0; i < (int)TERMFONT__MAX; i++) {
pdf_obj(p, (size_t)i + 3);
ps_printf(p, "<<\n");
ps_printf(p, "/Type /Font\n");
ps_printf(p, "/Subtype /Type1\n");
ps_printf(p, "/Name /F%zu\n", i);
ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
ps_printf(p, ">>\n");
}
}
p->engine.ps.pdfbody = (size_t)TERMFONT__MAX + 3;
p->engine.ps.pscol = p->engine.ps.left;
p->engine.ps.psrow = p->engine.ps.top;
p->engine.ps.flags |= PS_NEWPAGE;
ps_setfont(p, TERMFONT_NONE);
}
static void
ps_pletter(struct termp *p, int c)
{
int f;
/*
* If we haven't opened a page context, then output that we're
* in a new page and make sure the font is correctly set.
*/
if (PS_NEWPAGE & p->engine.ps.flags) {
if (TERMTYPE_PS == p->type) {
ps_printf(p, "%%%%Page: %zu %zu\n",
p->engine.ps.pages + 1,
p->engine.ps.pages + 1);
ps_printf(p, "/%s %zu selectfont\n",
fonts[(int)p->engine.ps.lastf].name,
p->engine.ps.scale);
} else {
pdf_obj(p, p->engine.ps.pdfbody +
p->engine.ps.pages * 4);
ps_printf(p, "<<\n");
ps_printf(p, "/Length %zu 0 R\n",
p->engine.ps.pdfbody + 1 +
p->engine.ps.pages * 4);
ps_printf(p, ">>\nstream\n");
}
p->engine.ps.pdflastpg = p->engine.ps.pdfbytes;
p->engine.ps.flags &= ~PS_NEWPAGE;
}
/*
* If we're not in a PostScript "word" context, then open one
* now at the current cursor.
*/
if ( ! (PS_INLINE & p->engine.ps.flags)) {
if (TERMTYPE_PS != p->type) {
ps_printf(p, "BT\n/F%d %zu Tf\n",
(int)p->engine.ps.lastf,
p->engine.ps.scale);
ps_printf(p, "%.3f %.3f Td\n(",
AFM2PNT(p, p->engine.ps.pscol),
AFM2PNT(p, p->engine.ps.psrow));
} else
ps_printf(p, "%.3f %.3f moveto\n(",
AFM2PNT(p, p->engine.ps.pscol),
AFM2PNT(p, p->engine.ps.psrow));
p->engine.ps.flags |= PS_INLINE;
}
assert( ! (PS_NEWPAGE & p->engine.ps.flags));
/*
* 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 += (size_t)fonts[f].gly[0].wx;
return;
}
ps_putchar(p, (char)c);
c -= 32;
p->engine.ps.pscol += (size_t)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.flags))
return;
if (TERMTYPE_PS != p->type) {
ps_printf(p, ") Tj\nET\n");
} else
ps_printf(p, ") show\n");
p->engine.ps.flags &= ~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.flags))
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.flags)
return;
/* Left-justify. */
p->engine.ps.pscol = p->engine.ps.left;
/* If we haven't printed anything, return. */
if (PS_NEWPAGE & p->engine.ps.flags)
return;
/*
* Put us down a line. If we're at the page bottom, spit out a
* showpage and restart our row.
*/
if (p->engine.ps.psrow >= p->engine.ps.lineheight +
p->engine.ps.bottom) {
p->engine.ps.psrow -= p->engine.ps.lineheight;
return;
}
ps_closepage(p);
}
static void
ps_setfont(struct termp *p, enum termfont f)
{
assert(f < TERMFONT__MAX);
p->engine.ps.lastf = f;
/*
* If we're still at the top of the page, let the font-setting
* be delayed until we actually have stuff to print.
*/
if (PS_NEWPAGE & p->engine.ps.flags)
return;
if (TERMTYPE_PS == p->type)
ps_printf(p, "/%s %zu selectfont\n",
fonts[(int)f].name,
p->engine.ps.scale);
else
ps_printf(p, "/F%d %zu Tf\n",
(int)f,
p->engine.ps.scale);
}
/* ARGSUSED */
static size_t
ps_width(const struct termp *p, char c)
{
if (c <= 32 || c - 32 >= MAXCHAR)
return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
c -= 32;
return((size_t)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);
}
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