=================================================================== RCS file: /cvs/mandoc/term_ps.c,v retrieving revision 1.1 retrieving revision 1.6 diff -u -p -r1.1 -r1.6 --- mandoc/term_ps.c 2010/06/08 13:22:37 1.1 +++ mandoc/term_ps.c 2010/06/10 23:56:33 1.6 @@ -1,4 +1,4 @@ -/* $Id: term_ps.c,v 1.1 2010/06/08 13:22:37 kristaps Exp $ */ +/* $Id: term_ps.c,v 1.6 2010/06/10 23:56:33 kristaps Exp $ */ /* * Copyright (c) 2008, 2009 Kristaps Dzonsons * @@ -18,12 +18,50 @@ #include "config.h" #endif +#include + +#include +#include +#include #include +#include #include "out.h" #include "main.h" #include "term.h" +#define PS_CHAR_WIDTH 6 +#define PS_CHAR_HEIGHT 12 +#define PS_CHAR_TOPMARG (792 - 24) +#define PS_CHAR_TOP (PS_CHAR_TOPMARG - 36) +#define PS_CHAR_LEFT 36 +#define PS_CHAR_BOTMARG 24 +#define PS_CHAR_BOT (PS_CHAR_BOTMARG + 36) + +#define PS_BUFSLOP 128 +#define PS_GROWBUF(p, sz) \ + do if ((p)->engine.ps.psmargcur + (sz) > \ + (p)->engine.ps.psmargsz) { \ + (p)->engine.ps.psmargsz += /* CONSTCOND */ \ + MAX(PS_BUFSLOP, (sz)); \ + (p)->engine.ps.psmarg = realloc \ + ((p)->engine.ps.psmarg, \ + (p)->engine.ps.psmargsz); \ + if (NULL == (p)->engine.ps.psmarg) { \ + perror(NULL); \ + exit(EXIT_FAILURE); \ + } \ + } while (/* CONSTCOND */ 0) + +static void ps_letter(struct termp *, char); +static void ps_begin(struct termp *); +static void ps_end(struct termp *); +static void ps_advance(struct termp *, size_t); +static void ps_endline(struct termp *); +static void ps_printf(struct termp *, const char *, ...); +static void ps_putchar(struct termp *, char); + + void * ps_alloc(void) { @@ -33,6 +71,11 @@ ps_alloc(void) return(NULL); p->type = TERMTYPE_PS; + p->letter = ps_letter; + p->begin = ps_begin; + p->end = ps_end; + p->advance = ps_advance; + p->endline = ps_endline; return(p); } @@ -40,6 +83,223 @@ ps_alloc(void) void ps_free(void *arg) { + struct termp *p; - term_free((struct termp *)arg); + p = (struct termp *)arg; + + if (p->engine.ps.psmarg) + free(p->engine.ps.psmarg); + + term_free(p); +} + + +static void +ps_printf(struct termp *p, const char *fmt, ...) +{ + va_list ap; + int pos; + + 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.psstate)) { + vprintf(fmt, ap); + va_end(ap); + 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; + vsnprintf(&p->engine.ps.psmarg[pos], PS_BUFSLOP, fmt, ap); + p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg); + + va_end(ap); +} + + +static void +ps_putchar(struct termp *p, char c) +{ + int pos; + + /* See ps_printf(). */ + + if ( ! (PS_MARGINS & p->engine.ps.psstate)) { + putchar(c); + return; + } + + PS_GROWBUF(p, 2); + + pos = (int)p->engine.ps.psmargcur++; + p->engine.ps.psmarg[pos++] = c; + p->engine.ps.psmarg[pos] = '\0'; +} + + +/* ARGSUSED */ +static void +ps_end(struct termp *p) +{ + + /* + * 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. + */ + + assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]); + printf("%s", p->engine.ps.psmarg); + printf("showpage\n"); + printf("%s\n", "%%EOF"); +} + + +static void +ps_begin(struct termp *p) +{ + + /* + * Emit the standard PostScript prologue, set our initial page + * position, then run pageopen() on the initial page. + */ + + printf("%s\n", "%!PS"); + printf("%s\n", "/Courier"); + printf("%s\n", "10 selectfont"); + + p->engine.ps.psstate = 0; + + if (p->engine.ps.psmarg) { + assert(p->engine.ps.psmargsz); + p->engine.ps.psmarg[0] = '\0'; + } + + p->engine.ps.psmargcur = 0; + + /* + * Now dump the margins into our margin buffer. If we don't do + * this, we'd break any current state to run the header and + * footer with each and evern new page. + */ + + p->engine.ps.pscol = PS_CHAR_LEFT; + p->engine.ps.psrow = PS_CHAR_TOPMARG; + + p->engine.ps.psstate |= PS_MARGINS; + + (*p->headf)(p, p->argf); + (*p->endline)(p); + + p->engine.ps.psstate &= ~PS_MARGINS; + assert(0 == p->engine.ps.psstate); + + p->engine.ps.pscol = PS_CHAR_LEFT; + p->engine.ps.psrow = PS_CHAR_BOTMARG; + p->engine.ps.psstate |= PS_MARGINS; + + (*p->footf)(p, p->argf); + (*p->endline)(p); + + p->engine.ps.psstate &= ~PS_MARGINS; + assert(0 == p->engine.ps.psstate); + + p->engine.ps.pscol = PS_CHAR_LEFT; + p->engine.ps.psrow = PS_CHAR_TOP; + + assert(p->engine.ps.psmarg); + assert('\0' != p->engine.ps.psmarg[0]); +} + + +static void +ps_letter(struct termp *p, char c) +{ + + if ( ! (PS_INLINE & p->engine.ps.psstate)) { + /* + * If we're not in a PostScript "word" context, then + * open one now at the current cursor. + */ + ps_printf(p, "%zu %zu moveto\n(", + p->engine.ps.pscol, + p->engine.ps.psrow); + p->engine.ps.psstate |= PS_INLINE; + } + + /* + * 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. */ + ps_putchar(p, c); + p->engine.ps.pscol += PS_CHAR_WIDTH; +} + + +static void +ps_advance(struct termp *p, size_t len) +{ + size_t i; + + if (PS_INLINE & p->engine.ps.psstate) { + for (i = 0; i < len; i++) + ps_letter(p, ' '); + return; + } + + p->engine.ps.pscol += len ? len * PS_CHAR_WIDTH : 0; +} + + +static void +ps_endline(struct termp *p) +{ + + if (PS_INLINE & p->engine.ps.psstate) { + ps_printf(p, ") show\n"); + p->engine.ps.psstate &= ~PS_INLINE; + } + + if (PS_MARGINS & p->engine.ps.psstate) + return; + + p->engine.ps.pscol = PS_CHAR_LEFT; + if (p->engine.ps.psrow >= PS_CHAR_HEIGHT + PS_CHAR_BOT) { + p->engine.ps.psrow -= PS_CHAR_HEIGHT; + return; + } + + assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]); + printf("%s", p->engine.ps.psmarg); + printf("showpage\n"); + p->engine.ps.psrow = PS_CHAR_TOP; }