version 1.1, 2010/06/08 13:22:37 |
version 1.10, 2010/06/19 20:46:28 |
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/* $Id$ */ |
/* $Id$ */ |
/* |
/* |
* 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 |
* Permission to use, copy, modify, and distribute this software for any |
* purpose with or without fee is hereby granted, provided that the above |
* purpose with or without fee is hereby granted, provided that the above |
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#include "config.h" |
#include "config.h" |
#endif |
#endif |
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#include <sys/param.h> |
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#include <assert.h> |
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#include <stdarg.h> |
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#include <stdio.h> |
#include <stdlib.h> |
#include <stdlib.h> |
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#include <string.h> |
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#include "out.h" |
#include "out.h" |
#include "main.h" |
#include "main.h" |
#include "term.h" |
#include "term.h" |
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#define PS_CHAR_WIDTH 6 |
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#define PS_CHAR_HEIGHT 12 |
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#define PS_CHAR_TOPMARG (792 - 24) |
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#define PS_CHAR_TOP (PS_CHAR_TOPMARG - 36) |
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#define PS_CHAR_LEFT 36 |
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#define PS_CHAR_BOTMARG 24 |
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#define PS_CHAR_BOT (PS_CHAR_BOTMARG + 36) |
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#define PS_BUFSLOP 128 |
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#define PS_GROWBUF(p, sz) \ |
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do if ((p)->engine.ps.psmargcur + (sz) > \ |
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(p)->engine.ps.psmargsz) { \ |
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(p)->engine.ps.psmargsz += /* CONSTCOND */ \ |
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MAX(PS_BUFSLOP, (sz)); \ |
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(p)->engine.ps.psmarg = realloc \ |
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((p)->engine.ps.psmarg, \ |
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(p)->engine.ps.psmargsz); \ |
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if (NULL == (p)->engine.ps.psmarg) { \ |
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perror(NULL); \ |
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exit(EXIT_FAILURE); \ |
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} \ |
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} while (/* CONSTCOND */ 0) |
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static void ps_letter(struct termp *, char); |
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static void ps_begin(struct termp *); |
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static void ps_end(struct termp *); |
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static void ps_advance(struct termp *, size_t); |
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static void ps_endline(struct termp *); |
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static void ps_fclose(struct termp *); |
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static void ps_pclose(struct termp *); |
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static void ps_pletter(struct termp *, char); |
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static void ps_printf(struct termp *, const char *, ...); |
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static void ps_putchar(struct termp *, char); |
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static void ps_setfont(struct termp *, enum termfont); |
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void * |
void * |
ps_alloc(void) |
ps_alloc(void) |
{ |
{ |
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return(NULL); |
return(NULL); |
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p->type = TERMTYPE_PS; |
p->type = TERMTYPE_PS; |
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p->letter = ps_letter; |
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p->begin = ps_begin; |
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p->end = ps_end; |
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p->advance = ps_advance; |
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p->endline = ps_endline; |
return(p); |
return(p); |
} |
} |
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void |
void |
ps_free(void *arg) |
ps_free(void *arg) |
{ |
{ |
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struct termp *p; |
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term_free((struct termp *)arg); |
p = (struct termp *)arg; |
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if (p->engine.ps.psmarg) |
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free(p->engine.ps.psmarg); |
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term_free(p); |
} |
} |
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static void |
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ps_printf(struct termp *p, const char *fmt, ...) |
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{ |
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va_list ap; |
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int pos; |
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va_start(ap, fmt); |
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/* |
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* If we're running in regular mode, then pipe directly into |
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* vprintf(). If we're processing margins, then push the data |
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* into our growable margin buffer. |
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*/ |
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if ( ! (PS_MARGINS & p->engine.ps.psstate)) { |
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vprintf(fmt, ap); |
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va_end(ap); |
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return; |
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} |
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/* |
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* XXX: I assume that the in-margin print won't exceed |
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* PS_BUFSLOP (128 bytes), which is reasonable but still an |
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* assumption that will cause pukeage if it's not the case. |
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*/ |
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PS_GROWBUF(p, PS_BUFSLOP); |
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pos = (int)p->engine.ps.psmargcur; |
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vsnprintf(&p->engine.ps.psmarg[pos], PS_BUFSLOP, fmt, ap); |
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p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg); |
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va_end(ap); |
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} |
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static void |
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ps_putchar(struct termp *p, char c) |
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{ |
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int pos; |
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/* See ps_printf(). */ |
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if ( ! (PS_MARGINS & p->engine.ps.psstate)) { |
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putchar(c); |
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return; |
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} |
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PS_GROWBUF(p, 2); |
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pos = (int)p->engine.ps.psmargcur++; |
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p->engine.ps.psmarg[pos++] = c; |
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p->engine.ps.psmarg[pos] = '\0'; |
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} |
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/* ARGSUSED */ |
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static void |
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ps_end(struct termp *p) |
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{ |
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/* |
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* At the end of the file, do one last showpage. This is the |
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* same behaviour as groff(1) and works for multiple pages as |
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* well as just one. |
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*/ |
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assert(0 == p->engine.ps.psstate); |
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assert('\0' == p->engine.ps.last); |
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assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]); |
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printf("%s", p->engine.ps.psmarg); |
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printf("showpage\n"); |
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printf("%s\n", "%%EOF"); |
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} |
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static void |
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ps_begin(struct termp *p) |
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{ |
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/* |
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* Print margins into margin buffer. Nothing gets output to the |
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* screen yet, so we don't need to initialise the primary state. |
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*/ |
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if (p->engine.ps.psmarg) { |
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assert(p->engine.ps.psmargsz); |
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p->engine.ps.psmarg[0] = '\0'; |
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} |
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p->engine.ps.psmargcur = 0; |
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p->engine.ps.psstate = PS_MARGINS; |
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p->engine.ps.pscol = PS_CHAR_LEFT; |
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p->engine.ps.psrow = PS_CHAR_TOPMARG; |
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ps_setfont(p, TERMFONT_NONE); |
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(*p->headf)(p, p->argf); |
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(*p->endline)(p); |
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p->engine.ps.pscol = PS_CHAR_LEFT; |
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p->engine.ps.psrow = PS_CHAR_BOTMARG; |
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(*p->footf)(p, p->argf); |
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(*p->endline)(p); |
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p->engine.ps.psstate &= ~PS_MARGINS; |
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assert(0 == p->engine.ps.psstate); |
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assert(p->engine.ps.psmarg); |
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assert('\0' != p->engine.ps.psmarg[0]); |
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/* |
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* Print header and initialise page state. Following this, |
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* stuff gets printed to the screen, so make sure we're sane. |
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*/ |
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printf("%s\n", "%!PS"); |
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ps_setfont(p, TERMFONT_NONE); |
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p->engine.ps.pscol = PS_CHAR_LEFT; |
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p->engine.ps.psrow = PS_CHAR_TOP; |
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} |
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static void |
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ps_pletter(struct termp *p, char c) |
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{ |
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/* |
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* If we're not in a PostScript "word" context, then open one |
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* now at the current cursor. |
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*/ |
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if ( ! (PS_INLINE & p->engine.ps.psstate)) { |
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ps_printf(p, "%zu %zu moveto\n(", |
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p->engine.ps.pscol, |
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p->engine.ps.psrow); |
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p->engine.ps.psstate |= PS_INLINE; |
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} |
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/* |
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* We need to escape these characters as per the PostScript |
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* specification. We would also escape non-graphable characters |
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* (like tabs), but none of them would get to this point and |
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* it's superfluous to abort() on them. |
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*/ |
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switch (c) { |
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case ('('): |
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/* FALLTHROUGH */ |
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case (')'): |
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/* FALLTHROUGH */ |
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case ('\\'): |
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ps_putchar(p, '\\'); |
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break; |
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default: |
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break; |
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} |
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/* Write the character and adjust where we are on the page. */ |
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ps_putchar(p, c); |
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p->engine.ps.pscol += PS_CHAR_WIDTH; |
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} |
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static void |
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ps_pclose(struct termp *p) |
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{ |
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/* |
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* Spit out that we're exiting a word context (this is a |
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* "partial close" because we don't check the last-char buffer |
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* or anything). |
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*/ |
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if ( ! (PS_INLINE & p->engine.ps.psstate)) |
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return; |
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ps_printf(p, ") show\n"); |
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p->engine.ps.psstate &= ~PS_INLINE; |
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} |
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static void |
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ps_fclose(struct termp *p) |
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{ |
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/* |
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* Strong closure: if we have a last-char, spit it out after |
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* checking that we're in the right font mode. This will of |
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* course open a new scope, if applicable. |
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* |
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* Following this, close out any scope that's open. |
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*/ |
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if ('\0' != p->engine.ps.last) { |
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if (p->engine.ps.lastf != TERMFONT_NONE) { |
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ps_pclose(p); |
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ps_setfont(p, TERMFONT_NONE); |
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} |
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ps_pletter(p, p->engine.ps.last); |
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p->engine.ps.last = '\0'; |
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} |
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if ( ! (PS_INLINE & p->engine.ps.psstate)) |
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return; |
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ps_pclose(p); |
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} |
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static void |
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ps_letter(struct termp *p, char c) |
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{ |
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char cc; |
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/* |
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* State machine dictates whether to buffer the last character |
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* or not. Basically, encoded words are detected by checking if |
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* we're an "8" and switching on the buffer. Then we put "8" in |
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* our buffer, and on the next charater, flush both character |
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* and buffer. Thus, "regular" words are detected by having a |
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* regular character and a regular buffer character. |
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*/ |
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if ('\0' == p->engine.ps.last) { |
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assert(8 != c); |
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p->engine.ps.last = c; |
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return; |
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} else if (8 == p->engine.ps.last) { |
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assert(8 != c); |
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p->engine.ps.last = '\0'; |
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} else if (8 == c) { |
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assert(8 != p->engine.ps.last); |
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if ('_' == p->engine.ps.last) { |
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if (p->engine.ps.lastf != TERMFONT_UNDER) { |
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ps_pclose(p); |
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ps_setfont(p, TERMFONT_UNDER); |
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} |
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} else if (p->engine.ps.lastf != TERMFONT_BOLD) { |
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ps_pclose(p); |
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ps_setfont(p, TERMFONT_BOLD); |
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} |
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p->engine.ps.last = c; |
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return; |
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} else { |
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if (p->engine.ps.lastf != TERMFONT_NONE) { |
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ps_pclose(p); |
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ps_setfont(p, TERMFONT_NONE); |
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} |
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cc = p->engine.ps.last; |
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p->engine.ps.last = c; |
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c = cc; |
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} |
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ps_pletter(p, c); |
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} |
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static void |
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ps_advance(struct termp *p, size_t len) |
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{ |
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/* |
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* Advance some spaces. This can probably be made smarter, |
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* i.e., to have multiple space-separated words in the same |
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* scope, but this is easier: just close out the current scope |
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* and readjust our column settings. |
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*/ |
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ps_fclose(p); |
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p->engine.ps.pscol += len ? len * PS_CHAR_WIDTH : 0; |
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} |
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static void |
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ps_endline(struct termp *p) |
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{ |
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/* Close out any scopes we have open: we're at eoln. */ |
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ps_fclose(p); |
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/* |
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* If we're in the margin, don't try to recalculate our current |
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* row. XXX: if the column tries to be fancy with multiple |
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* lines, we'll do nasty stuff. |
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*/ |
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if (PS_MARGINS & p->engine.ps.psstate) |
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return; |
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/* |
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* Put us down a line. If we're at the page bottom, spit out a |
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* showpage and restart our row. |
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*/ |
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p->engine.ps.pscol = PS_CHAR_LEFT; |
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if (p->engine.ps.psrow >= PS_CHAR_HEIGHT + PS_CHAR_BOT) { |
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p->engine.ps.psrow -= PS_CHAR_HEIGHT; |
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return; |
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} |
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assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]); |
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printf("%s", p->engine.ps.psmarg); |
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printf("showpage\n"); |
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p->engine.ps.psrow = PS_CHAR_TOP; |
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} |
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static void |
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ps_setfont(struct termp *p, enum termfont f) |
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{ |
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if (TERMFONT_BOLD == f) |
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ps_printf(p, "/Courier-Bold\n"); |
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else if (TERMFONT_UNDER == f) |
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ps_printf(p, "/Courier-Oblique\n"); |
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else |
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ps_printf(p, "/Courier\n"); |
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ps_printf(p, "10 selectfont\n"); |
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p->engine.ps.lastf = f; |
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} |
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