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Diff for /mandoc/term_ps.c between version 1.1 and 1.2

version 1.1, 2010/06/08 13:22:37 version 1.2, 2010/06/08 15:00:17
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 #include "config.h"  #include "config.h"
 #endif  #endif
   
   #include <assert.h>
   #include <stdio.h>
 #include <stdlib.h>  #include <stdlib.h>
   
 #include "out.h"  #include "out.h"
 #include "main.h"  #include "main.h"
 #include "term.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)
   
   static  void              ps_letter(struct termp *, char);
   static  void              ps_begin(struct termp *);
   static  void              ps_end(struct termp *);
   static  void              ps_pageopen(struct termp *);
   static  void              ps_advance(struct termp *, size_t);
   static  void              ps_endline(struct termp *);
   
   
 void *  void *
 ps_alloc(void)  ps_alloc(void)
 {  {
Line 33  ps_alloc(void)
Line 51  ps_alloc(void)
                 return(NULL);                  return(NULL);
   
         p->type = TERMTYPE_PS;          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);          return(p);
 }  }
   
Line 42  ps_free(void *arg)
Line 65  ps_free(void *arg)
 {  {
   
         term_free((struct termp *)arg);          term_free((struct termp *)arg);
   }
   
   
   static void
   ps_end(struct termp *p)
   {
   
           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.pspage = 1;
           p->engine.ps.psstate = 0;
           ps_pageopen(p);
   }
   
   
   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.
                    */
                   printf("%zu %zu moveto\n",
                                   p->engine.ps.pscol,
                                   p->engine.ps.psrow);
                   putchar('(');
                   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 ('\\'):
                   putchar('\\');
                   break;
           default:
                   break;
           }
   
           /* Write the character and adjust where we are on the page. */
           putchar(c);
           p->engine.ps.pscol += PS_CHAR_WIDTH;
   }
   
   
   /*
    * Open a page.  This is only used for -Tps at the moment.  It opens a
    * page context, printing the header and the footer.  THE OUTPUT BUFFER
    * MUST BE EMPTY.  If it is not, output will ghost on the next line and
    * we'll be all gross and out of state.
    */
   static void
   ps_pageopen(struct termp *p)
   {
   
           assert(TERMTYPE_PS == p->type);
           assert(0 == p->engine.ps.psstate);
   
           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;
   
   }
   
   
   static void
   ps_advance(struct termp *p, size_t len)
   {
   
           if (PS_INLINE & p->engine.ps.psstate) {
                   /* Dump out any existing line scope. */
                   printf(") show\n");
                   p->engine.ps.psstate &= ~PS_INLINE;
           }
   
           p->engine.ps.pscol += len ? len * PS_CHAR_WIDTH : 0;
   }
   
   
   static void
   ps_endline(struct termp *p)
   {
   
           if (PS_INLINE & p->engine.ps.psstate) {
                   printf(") 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;
           }
   
           /*
            * XXX: can't run pageopen() until we're certain a flushln() has
            * occured, else the buf will reopen in an awkward state on the
            * next line.
            */
           printf("showpage\n");
           p->engine.ps.psrow = PS_CHAR_TOP;
 }  }
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