diff options
Diffstat (limited to 'contrib/groff/grotty/tty.cc')
| -rw-r--r-- | contrib/groff/grotty/tty.cc | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/contrib/groff/grotty/tty.cc b/contrib/groff/grotty/tty.cc new file mode 100644 index 000000000000..3ac46aa71cbe --- /dev/null +++ b/contrib/groff/grotty/tty.cc @@ -0,0 +1,443 @@ +// -*- 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); +} |