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freebsd-nq/contrib/mdocml/term_ps.c
Baptiste Daroussin 2b774394cc Update mandoc to 20160116
2016-01-15 23:28:12 +00:00

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/* $Id: term_ps.c,v 1.80 2015/12/23 20:50:13 schwarze Exp $ */
/*
* Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
*
* 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 AUTHORS DISCLAIM ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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.
*/
#include "config.h"
#include <sys/types.h>
#include <assert.h>
#if HAVE_ERR
#include <err.h>
#endif
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mandoc_aux.h"
#include "out.h"
#include "term.h"
#include "manconf.h"
#include "main.h"
/* These work the buffer used by the header and footer. */
#define PS_BUFSLOP 128
/* Convert PostScript point "x" to an AFM unit. */
#define PNT2AFM(p, x) \
(size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale))
/* Convert an AFM unit "x" to a PostScript points */
#define AFM2PNT(p, x) \
((double)(x) / (1000.0 / (double)(p)->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 */
};
struct termp_ps {
int flags;
#define PS_INLINE (1 << 0) /* we're in a word */
#define PS_MARGINS (1 << 1) /* we're in the margins */
#define PS_NEWPAGE (1 << 2) /* new page, no words yet */
#define PS_BACKSP (1 << 3) /* last character was backspace */
size_t pscol; /* visible column (AFM units) */
size_t pscolnext; /* used for overstrike */
size_t psrow; /* visible row (AFM units) */
char *psmarg; /* margin buf */
size_t psmargsz; /* margin buf size */
size_t psmargcur; /* cur index in margin buf */
char last; /* last non-backspace seen */
enum termfont lastf; /* last set font */
enum termfont nextf; /* building next font here */
size_t scale; /* font scaling factor */
size_t pages; /* number of pages shown */
size_t lineheight; /* line height (AFM units) */
size_t top; /* body top (AFM units) */
size_t bottom; /* body bottom (AFM units) */
size_t height; /* page height (AFM units */
size_t width; /* page width (AFM units) */
size_t lastwidth; /* page width before last ll */
size_t left; /* body left (AFM units) */
size_t header; /* header pos (AFM units) */
size_t footer; /* footer pos (AFM units) */
size_t pdfbytes; /* current output byte */
size_t pdflastpg; /* byte of last page mark */
size_t pdfbody; /* start of body object */
size_t *pdfobjs; /* table of object offsets */
size_t pdfobjsz; /* size of pdfobjs */
};
static int ps_hspan(const struct termp *,
const struct roffsu *);
static size_t ps_width(const struct termp *, int);
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_growbuf(struct termp *, size_t);
static void ps_letter(struct termp *, int);
static void ps_pclose(struct termp *);
static void ps_pletter(struct termp *, int);
#if __GNUC__ - 0 >= 4
__attribute__((__format__ (__printf__, 2, 3)))
#endif
static void ps_printf(struct termp *, const char *, ...);
static void ps_putchar(struct termp *, char);
static void ps_setfont(struct termp *, enum termfont);
static void ps_setwidth(struct termp *, int, int);
static struct termp *pspdf_alloc(const struct manoutput *);
static void pdf_obj(struct termp *, size_t);
/*
* 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 },
} },
{ "Times-BoldItalic", {
{ 250 },
{ 389 },
{ 555 },
{ 500 },
{ 500 },
{ 833 },
{ 778 },
{ 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 },
{ 832 },
{ 667 },
{ 667 },
{ 667 },
{ 722 },
{ 667 },
{ 667 },
{ 722 },
{ 778 },
{ 389 },
{ 500 },
{ 667 },
{ 611 },
{ 889 },
{ 722 },
{ 722 },
{ 611 },
{ 722 },
{ 667 },
{ 556 },
{ 611 },
{ 722 },
{ 667 },
{ 889 },
{ 667 },
{ 611 },
{ 611 },
{ 333 },
{ 278 },
{ 333 },
{ 570 },
{ 500 },
{ 333 },
{ 500 },
{ 500 },
{ 444 },
{ 500 },
{ 444 },
{ 333 },
{ 500 },
{ 556 },
{ 278 },
{ 278 },
{ 500 },
{ 278 },
{ 778 },
{ 556 },
{ 500 },
{ 500 },
{ 500 },
{ 389 },
{ 389 },
{ 278 },
{ 556 },
{ 444 },
{ 667 },
{ 500 },
{ 444 },
{ 389 },
{ 348 },
{ 220 },
{ 348 },
{ 570 },
} },
};
void *
pdf_alloc(const struct manoutput *outopts)
{
struct termp *p;
if (NULL != (p = pspdf_alloc(outopts)))
p->type = TERMTYPE_PDF;
return p;
}
void *
ps_alloc(const struct manoutput *outopts)
{
struct termp *p;
if (NULL != (p = pspdf_alloc(outopts)))
p->type = TERMTYPE_PS;
return p;
}
static struct termp *
pspdf_alloc(const struct manoutput *outopts)
{
struct termp *p;
unsigned int pagex, pagey;
size_t marginx, marginy, lineheight;
const char *pp;
p = mandoc_calloc(1, sizeof(struct termp));
p->enc = TERMENC_ASCII;
p->fontq = mandoc_reallocarray(NULL,
(p->fontsz = 8), sizeof(enum termfont));
p->fontq[0] = p->fontl = TERMFONT_NONE;
p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
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->setwidth = ps_setwidth;
p->width = ps_width;
/* 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.
*/
pp = outopts->paper;
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, "%ux%u", &pagex, &pagey))
warnx("%s: Unknown paper", pp);
}
/*
* This MUST be defined before any PNT2AFM or AFM2PNT
* calculations occur.
*/
p->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 = (size_t)((double)pagex / 9.0);
marginy = (size_t)((double)pagey / 9.0);
/* Line-height is 1.4em. */
lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
p->ps->width = p->ps->lastwidth = (size_t)pagex;
p->ps->height = (size_t)pagey;
p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
p->ps->top = pagey - marginy;
p->ps->footer = (marginy / 2) - (lineheight / 2);
p->ps->bottom = marginy;
p->ps->left = marginx;
p->ps->lineheight = lineheight;
p->defrmargin = pagex - (marginx * 2);
return p;
}
static void
ps_setwidth(struct termp *p, int iop, int width)
{
size_t lastwidth;
lastwidth = p->ps->width;
if (iop > 0)
p->ps->width += width;
else if (iop == 0)
p->ps->width = width ? (size_t)width : p->ps->lastwidth;
else if (p->ps->width > (size_t)width)
p->ps->width -= width;
else
p->ps->width = 0;
p->ps->lastwidth = lastwidth;
}
void
pspdf_free(void *arg)
{
struct termp *p;
p = (struct termp *)arg;
free(p->ps->psmarg);
free(p->ps->pdfobjs);
free(p->ps);
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->ps->flags)) {
len = vprintf(fmt, ap);
va_end(ap);
p->ps->pdfbytes += 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->ps->psmargcur;
vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
va_end(ap);
p->ps->psmargcur = strlen(p->ps->psmarg);
}
static void
ps_putchar(struct termp *p, char c)
{
int pos;
/* See ps_printf(). */
if ( ! (PS_MARGINS & p->ps->flags)) {
putchar(c);
p->ps->pdfbytes++;
return;
}
ps_growbuf(p, 2);
pos = (int)p->ps->psmargcur++;
p->ps->psmarg[pos++] = c;
p->ps->psmarg[pos] = '\0';
}
static void
pdf_obj(struct termp *p, size_t obj)
{
assert(obj > 0);
if ((obj - 1) >= p->ps->pdfobjsz) {
p->ps->pdfobjsz = obj + 128;
p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs,
p->ps->pdfobjsz, sizeof(size_t));
}
p->ps->pdfobjs[(int)obj - 1] = p->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->ps->psmarg && p->ps->psmarg[0]);
ps_printf(p, "%s", p->ps->psmarg);
if (TERMTYPE_PS != p->type) {
ps_printf(p, "ET\n");
len = p->ps->pdfbytes - p->ps->pdflastpg;
base = p->ps->pages * 4 + p->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->ps->pages++;
p->ps->psrow = p->ps->top;
assert( ! (PS_NEWPAGE & p->ps->flags));
p->ps->flags |= PS_NEWPAGE;
}
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->ps->flags)) {
assert(0 == p->ps->flags);
assert('\0' == p->ps->last);
ps_closepage(p);
}
if (TERMTYPE_PS == p->type) {
ps_printf(p, "%%%%Trailer\n");
ps_printf(p, "%%%%Pages: %zu\n", p->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->ps->width),
(size_t)AFM2PNT(p, p->ps->height));
ps_printf(p, "/Count %zu\n", p->ps->pages);
ps_printf(p, "/Kids [");
for (i = 0; i < p->ps->pages; i++)
ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
base = (p->ps->pages - 1) * 4 + p->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->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->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)
{
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->ps->psmarg) {
assert(p->ps->psmargsz);
p->ps->psmarg[0] = '\0';
}
/*p->ps->pdfbytes = 0;*/
p->ps->psmargcur = 0;
p->ps->flags = PS_MARGINS;
p->ps->pscol = p->ps->left;
p->ps->psrow = p->ps->header;
ps_setfont(p, TERMFONT_NONE);
(*p->headf)(p, p->argf);
(*p->endline)(p);
p->ps->pscol = p->ps->left;
p->ps->psrow = p->ps->footer;
(*p->footf)(p, p->argf);
(*p->endline)(p);
p->ps->flags &= ~PS_MARGINS;
assert(0 == p->ps->flags);
assert(p->ps->psmarg);
assert('\0' != p->ps->psmarg[0]);
/*
* Print header and initialise page state. Following this,
* stuff gets printed to the screen, so make sure we're sane.
*/
if (TERMTYPE_PS == p->type) {
ps_printf(p, "%%!PS-Adobe-3.0\n");
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->ps->width),
(size_t)AFM2PNT(p, p->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%d\n", i);
ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
ps_printf(p, ">>\n");
}
}
p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
p->ps->pscol = p->ps->left;
p->ps->psrow = p->ps->top;
p->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->ps->flags) {
if (TERMTYPE_PS == p->type) {
ps_printf(p, "%%%%Page: %zu %zu\n",
p->ps->pages + 1, p->ps->pages + 1);
ps_printf(p, "/%s %zu selectfont\n",
fonts[(int)p->ps->lastf].name,
p->ps->scale);
} else {
pdf_obj(p, p->ps->pdfbody +
p->ps->pages * 4);
ps_printf(p, "<<\n");
ps_printf(p, "/Length %zu 0 R\n",
p->ps->pdfbody + 1 + p->ps->pages * 4);
ps_printf(p, ">>\nstream\n");
}
p->ps->pdflastpg = p->ps->pdfbytes;
p->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->ps->flags)) {
if (TERMTYPE_PS != p->type) {
ps_printf(p, "BT\n/F%d %zu Tf\n",
(int)p->ps->lastf, p->ps->scale);
ps_printf(p, "%.3f %.3f Td\n(",
AFM2PNT(p, p->ps->pscol),
AFM2PNT(p, p->ps->psrow));
} else
ps_printf(p, "%.3f %.3f moveto\n(",
AFM2PNT(p, p->ps->pscol),
AFM2PNT(p, p->ps->psrow));
p->ps->flags |= PS_INLINE;
}
assert( ! (PS_NEWPAGE & p->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 '(':
case ')':
case '\\':
ps_putchar(p, '\\');
break;
default:
break;
}
/* Write the character and adjust where we are on the page. */
f = (int)p->ps->lastf;
if (c <= 32 || c - 32 >= MAXCHAR)
c = 32;
ps_putchar(p, (char)c);
c -= 32;
p->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->ps->flags))
return;
if (TERMTYPE_PS != p->type) {
ps_printf(p, ") Tj\nET\n");
} else
ps_printf(p, ") show\n");
p->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 (p->ps->last != '\0') {
assert( ! (p->ps->flags & PS_BACKSP));
if (p->ps->nextf != p->ps->lastf) {
ps_pclose(p);
ps_setfont(p, p->ps->nextf);
}
p->ps->nextf = TERMFONT_NONE;
ps_pletter(p, p->ps->last);
p->ps->last = '\0';
}
if ( ! (PS_INLINE & p->ps->flags))
return;
ps_pclose(p);
}
static void
ps_letter(struct termp *p, int arg)
{
size_t savecol, wx;
char c;
c = arg >= 128 || arg <= 0 ? '?' : arg;
/*
* When receiving a backspace, merely flag it.
* We don't know yet whether it is
* a font instruction or an overstrike.
*/
if (c == '\b') {
assert(p->ps->last != '\0');
assert( ! (p->ps->flags & PS_BACKSP));
p->ps->flags |= PS_BACKSP;
return;
}
/*
* Decode font instructions.
*/
if (p->ps->flags & PS_BACKSP) {
if (p->ps->last == '_') {
switch (p->ps->nextf) {
case TERMFONT_BI:
break;
case TERMFONT_BOLD:
p->ps->nextf = TERMFONT_BI;
break;
default:
p->ps->nextf = TERMFONT_UNDER;
}
p->ps->last = c;
p->ps->flags &= ~PS_BACKSP;
return;
}
if (p->ps->last == c) {
switch (p->ps->nextf) {
case TERMFONT_BI:
break;
case TERMFONT_UNDER:
p->ps->nextf = TERMFONT_BI;
break;
default:
p->ps->nextf = TERMFONT_BOLD;
}
p->ps->flags &= ~PS_BACKSP;
return;
}
/*
* This is not a font instruction, but rather
* the next character. Prepare for overstrike.
*/
savecol = p->ps->pscol;
} else
savecol = SIZE_MAX;
/*
* We found the next character, so the font instructions
* for the previous one are complete.
* Use them and print it.
*/
if (p->ps->last != '\0') {
if (p->ps->nextf != p->ps->lastf) {
ps_pclose(p);
ps_setfont(p, p->ps->nextf);
}
p->ps->nextf = TERMFONT_NONE;
/*
* For an overstrike, if a previous character
* was wider, advance to center the new one.
*/
if (p->ps->pscolnext) {
wx = fonts[p->ps->lastf].gly[(int)p->ps->last-32].wx;
if (p->ps->pscol + wx < p->ps->pscolnext)
p->ps->pscol = (p->ps->pscol +
p->ps->pscolnext - wx) / 2;
}
ps_pletter(p, p->ps->last);
/*
* For an overstrike, if a previous character
* was wider, advance to the end of the old one.
*/
if (p->ps->pscol < p->ps->pscolnext) {
ps_pclose(p);
p->ps->pscol = p->ps->pscolnext;
}
}
/*
* Do not print the current character yet because font
* instructions might follow; only remember it.
* For the first character, nothing else is done.
* The final character will get printed from ps_fclose().
*/
p->ps->last = c;
/*
* For an overstrike, back up to the previous position.
* If the previous character is wider than any it overstrikes,
* remember the current position, because it might also be
* wider than all that will overstrike it.
*/
if (savecol != SIZE_MAX) {
if (p->ps->pscolnext < p->ps->pscol)
p->ps->pscolnext = p->ps->pscol;
ps_pclose(p);
p->ps->pscol = savecol;
p->ps->flags &= ~PS_BACKSP;
} else
p->ps->pscolnext = 0;
}
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->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->ps->flags)
return;
/* Left-justify. */
p->ps->pscol = p->ps->left;
/* If we haven't printed anything, return. */
if (PS_NEWPAGE & p->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->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
p->ps->psrow -= p->ps->lineheight;
return;
}
ps_closepage(p);
}
static void
ps_setfont(struct termp *p, enum termfont f)
{
assert(f < TERMFONT__MAX);
p->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->ps->flags)
return;
if (TERMTYPE_PS == p->type)
ps_printf(p, "/%s %zu selectfont\n",
fonts[(int)f].name, p->ps->scale);
else
ps_printf(p, "/F%d %zu Tf\n",
(int)f, p->ps->scale);
}
static size_t
ps_width(const struct termp *p, int c)
{
if (c <= 32 || c - 32 >= MAXCHAR)
c = 0;
else
c -= 32;
return (size_t)fonts[(int)TERMFONT_NONE].gly[c].wx;
}
static int
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_BU:
/*
* Traditionally, the default unit is fixed to the
* output media. So this would refer to the point. In
* mandoc(1), however, we stick to the default terminal
* scaling unit so that output is the same regardless
* the media.
*/
r = PNT2AFM(p, su->scale * 72.0 / 240.0);
break;
case SCALE_CM:
r = PNT2AFM(p, su->scale * 72.0 / 2.54);
break;
case SCALE_EM:
r = su->scale *
fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
break;
case SCALE_EN:
r = su->scale *
fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
break;
case SCALE_IN:
r = PNT2AFM(p, su->scale * 72.0);
break;
case SCALE_MM:
r = su->scale *
fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
break;
case SCALE_PC:
r = PNT2AFM(p, su->scale * 12.0);
break;
case SCALE_PT:
r = PNT2AFM(p, su->scale * 1.0);
break;
case SCALE_VS:
r = su->scale * p->ps->lineheight;
break;
default:
r = su->scale;
break;
}
return r * 24.0;
}
static void
ps_growbuf(struct termp *p, size_t sz)
{
if (p->ps->psmargcur + sz <= p->ps->psmargsz)
return;
if (sz < PS_BUFSLOP)
sz = PS_BUFSLOP;
p->ps->psmargsz += sz;
p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
}
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