freebsd-dev/contrib/groff/grotty/tty.cc

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1996-09-07 16:18:32 +00:00
// -*- C++ -*-
/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
This file is part of groff.
groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
groff is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with groff; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "driver.h"
#ifndef SHRT_MIN
#define SHRT_MIN (-32768)
#endif
#ifndef SHRT_MAX
#define SHRT_MAX 32767
#endif
#define TAB_WIDTH 8
static int horizontal_tab_flag = 0;
static int form_feed_flag = 0;
static int bold_flag = 1;
static int underline_flag = 1;
static int overstrike_flag = 1;
static int draw_flag = 1;
enum {
UNDERLINE_MODE = 01,
BOLD_MODE = 02,
VDRAW_MODE = 04,
HDRAW_MODE = 010
};
// Mode to use for bold-underlining.
static unsigned char bold_underline_mode = BOLD_MODE|UNDERLINE_MODE;
class tty_font : public font {
tty_font(const char *);
unsigned char mode;
public:
~tty_font();
unsigned char get_mode() { return mode; }
#if 0
void handle_x_command(int argc, const char **argv);
#endif
static tty_font *load_tty_font(const char *);
};
tty_font *tty_font::load_tty_font(const char *s)
{
tty_font *f = new tty_font(s);
if (!f->load()) {
delete f;
return 0;
}
const char *num = f->get_internal_name();
long n;
if (num != 0 && (n = strtol(num, 0, 0)) != 0)
f->mode = int(n & (BOLD_MODE|UNDERLINE_MODE));
if (!underline_flag)
f->mode &= ~UNDERLINE_MODE;
if (!bold_flag)
f->mode &= ~BOLD_MODE;
if ((f->mode & (BOLD_MODE|UNDERLINE_MODE)) == (BOLD_MODE|UNDERLINE_MODE))
f->mode = (f->mode & ~(BOLD_MODE|UNDERLINE_MODE)) | bold_underline_mode;
return f;
}
tty_font::tty_font(const char *nm)
: font(nm), mode(0)
{
}
tty_font::~tty_font()
{
}
#if 0
void tty_font::handle_x_command(int argc, const char **argv)
{
if (argc >= 1 && strcmp(argv[0], "bold") == 0)
mode |= BOLD_MODE;
else if (argc >= 1 && strcmp(argv[0], "underline") == 0)
mode |= UNDERLINE_MODE;
}
#endif
class glyph {
static glyph *free_list;
public:
glyph *next;
short hpos;
unsigned char code;
unsigned char mode;
void *operator new(size_t);
void operator delete(void *);
inline int draw_mode() { return mode & (VDRAW_MODE|HDRAW_MODE); }
};
glyph *glyph::free_list = 0;
void *glyph::operator new(size_t)
{
if (!free_list) {
const int BLOCK = 1024;
free_list = (glyph *)new char[sizeof(glyph)*BLOCK];
for (int i = 0; i < BLOCK - 1; i++)
free_list[i].next = free_list + i + 1;
free_list[BLOCK - 1].next = 0;
}
glyph *p = free_list;
free_list = free_list->next;
p->next = 0;
return p;
}
void glyph::operator delete(void *p)
{
if (p) {
((glyph *)p)->next = free_list;
free_list = (glyph *)p;
}
}
class tty_printer : public printer {
glyph **lines;
int nlines;
int cached_v;
int cached_vpos;
void add_char(unsigned char, int, int, unsigned char);
public:
tty_printer();
~tty_printer();
void set_char(int, font *, const environment *, int);
void draw(int code, int *p, int np, const environment *env);
void begin_page(int) { }
void end_page(int page_length);
font *make_font(const char *);
};
tty_printer::tty_printer() : cached_v(0)
{
nlines = 66;
lines = new glyph *[nlines];
for (int i = 0; i < nlines; i++)
lines[i] = 0;
}
tty_printer::~tty_printer()
{
a_delete lines;
}
void tty_printer::set_char(int i, font *f, const environment *env, int w)
{
if (w != font::hor)
fatal("width of character not equal to horizontal resolution");
add_char(f->get_code(i), env->hpos, env->vpos, ((tty_font *)f)->get_mode());
}
void tty_printer::add_char(unsigned char c, int h, int v, unsigned char mode)
{
#if 0
// This is too expensive.
if (h % font::hor != 0)
fatal("horizontal position not a multiple of horizontal resolution");
#endif
int hpos = h / font::hor;
if (hpos < SHRT_MIN || hpos > SHRT_MAX) {
error("character with ridiculous horizontal position discarded");
return;
}
int vpos;
if (v == cached_v && cached_v != 0)
vpos = cached_vpos;
else {
if (v % font::vert != 0)
fatal("vertical position not a multiple of vertical resolution");
vpos = v / font::vert;
if (vpos > nlines) {
glyph **old_lines = lines;
lines = new glyph *[vpos + 1];
memcpy(lines, old_lines, nlines*sizeof(glyph *));
for (int i = nlines; i <= vpos; i++)
lines[i] = 0;
a_delete old_lines;
nlines = vpos + 1;
}
// Note that the first output line corresponds to groff
// position font::vert.
if (vpos <= 0) {
error("character above first line discarded");
return;
}
cached_v = v;
cached_vpos = vpos;
}
glyph *g = new glyph;
g->hpos = hpos;
g->code = c;
g->mode = mode;
// The list will be reversed later. After reversal, it must be in
// increasing order of hpos, with HDRAW characters before VDRAW
// characters before normal characters at each hpos, and otherwise
// in order of occurrence.
glyph **pp;
for (pp = lines + (vpos - 1); *pp; pp = &(*pp)->next)
if ((*pp)->hpos < hpos
|| ((*pp)->hpos == hpos && (*pp)->draw_mode() >= g->draw_mode()))
break;
g->next = *pp;
*pp = g;
}
void tty_printer::draw(int code, int *p, int np, const environment *env)
{
if (code != 'l' || !draw_flag)
return;
if (np != 2) {
error("2 arguments required for line");
return;
}
if (p[0] == 0) {
// vertical line
int v = env->vpos;
int len = p[1];
if (len < 0) {
v += len;
len = -len;
}
while (len >= 0) {
add_char('|', env->hpos, v, VDRAW_MODE);
len -= font::vert;
v += font::vert;
}
}
if (p[1] == 0) {
// horizontal line
int h = env->hpos;
int len = p[0];
if (len < 0) {
h += len;
len = -len;
}
while (len >= 0) {
add_char('-', h, env->vpos, HDRAW_MODE);
len -= font::hor;
h += font::hor;
}
}
}
void tty_printer::end_page(int page_length)
{
if (page_length % font::vert != 0)
error("vertical position at end of page not multiple of vertical resolution");
int lines_per_page = page_length / font::vert;
int last_line;
for (last_line = nlines; last_line > 0; last_line--)
if (lines[last_line - 1])
break;
#if 0
if (last_line > lines_per_page) {
error("characters past last line discarded");
do {
--last_line;
while (lines[last_line]) {
glyph *tem = lines[last_line];
lines[last_line] = tem->next;
delete tem;
}
} while (last_line > lines_per_page);
}
#endif
for (int i = 0; i < last_line; i++) {
glyph *p = lines[i];
lines[i] = 0;
glyph *g = 0;
while (p) {
glyph *tem = p->next;
p->next = g;
g = p;
p = tem;
}
int hpos = 0;
glyph *nextp;
for (p = g; p; delete p, p = nextp) {
nextp = p->next;
if (nextp && p->hpos == nextp->hpos) {
if (p->draw_mode() == HDRAW_MODE && nextp->draw_mode() == VDRAW_MODE) {
nextp->code = '+';
continue;
}
if (p->draw_mode() != 0 && p->draw_mode() == nextp->draw_mode()) {
nextp->code = p->code;
continue;
}
if (!overstrike_flag)
continue;
}
if (hpos > p->hpos) {
do {
putchar('\b');
hpos--;
} while (hpos > p->hpos);
}
else {
if (horizontal_tab_flag) {
for (;;) {
int next_tab_pos = ((hpos + TAB_WIDTH) / TAB_WIDTH) * TAB_WIDTH;
if (next_tab_pos > p->hpos)
break;
putchar('\t');
hpos = next_tab_pos;
}
}
for (; hpos < p->hpos; hpos++)
putchar(' ');
}
assert(hpos == p->hpos);
if (p->mode & UNDERLINE_MODE) {
putchar('_');
putchar('\b');
}
if (p->mode & BOLD_MODE) {
putchar(p->code);
putchar('\b');
}
putchar(p->code);
hpos++;
}
putchar('\n');
}
if (form_feed_flag) {
if (last_line < lines_per_page)
putchar('\f');
}
else {
for (; last_line < lines_per_page; last_line++)
putchar('\n');
}
}
font *tty_printer::make_font(const char *nm)
{
return tty_font::load_tty_font(nm);
}
printer *make_printer()
{
return new tty_printer;
}
static void usage();
int main(int argc, char **argv)
{
program_name = argv[0];
static char stderr_buf[BUFSIZ];
setbuf(stderr, stderr_buf);
int c;
while ((c = getopt(argc, argv, "F:vhfbuoBUd")) != EOF)
switch(c) {
case 'v':
{
extern const char *version_string;
fprintf(stderr, "grotty version %s\n", version_string);
fflush(stderr);
break;
}
case 'b':
// Do not embolden by overstriking.
bold_flag = 0;
break;
case 'u':
// Do not underline.
underline_flag = 0;
break;
case 'o':
// Do not overstrike (other than emboldening and underlining).
overstrike_flag = 0;
break;
case 'B':
// Do bold-underlining as bold.
bold_underline_mode = BOLD_MODE;
break;
case 'U':
// Do bold-underlining as underlining.
bold_underline_mode = UNDERLINE_MODE;
break;
case 'h':
// Use horizontal tabs.
horizontal_tab_flag = 1;
break;
case 'f':
form_feed_flag = 1;
break;
case 'F':
font::command_line_font_dir(optarg);
break;
case 'd':
// Ignore \D commands.
draw_flag = 0;
break;
case '?':
usage();
break;
default:
assert(0);
}
if (optind >= argc)
do_file("-");
else {
for (int i = optind; i < argc; i++)
do_file(argv[i]);
}
delete pr;
return 0;
}
static void usage()
{
fprintf(stderr, "usage: %s [-hfvbuodBU] [-F dir] [files ...]\n",
program_name);
exit(1);
}