"sys/param.h is for kernel interface programs.

[mandoc.git] / term.c

diff --git a/term.c b/term.c
index f44dacc74b7a591ba863f6315d6284f02e98a8c8..79a0f45f4786d8165d302a200aab7cb7027fd81b 100644 (file)
--- a/term.c
+++ b/term.c
@@ -1,6 +1,7 @@
-/*     $Id: term.c,v 1.130 2010/04/03 12:46:35 kristaps Exp $ */
+/*     $Id: term.c,v 1.169 2010/08/20 23:34:02 schwarze Exp $ */

 /*
 /*

- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>

  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above


@@ -22,67 +23,69 @@
 
 #include <assert.h>
 #include <ctype.h>
 
 #include <assert.h>
 #include <ctype.h>

+#include <stdint.h>

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

-#include <time.h>

 
 

+#include "mandoc.h"

 #include "chars.h"
 #include "out.h"
 #include "term.h"
 #include "chars.h"
 #include "out.h"
 #include "term.h"

-#include "man.h"
-#include "mdoc.h"

 #include "main.h"
 
 #include "main.h"
 

-static struct termp     *term_alloc(enum termenc);
-static void              term_free(struct termp *);
-static void              spec(struct termp *, const char *, size_t);
+static void              spec(struct termp *, enum roffdeco,
+                               const char *, size_t);

 static void              res(struct termp *, const char *, size_t);
 static void              res(struct termp *, const char *, size_t);

-static void              buffera(struct termp *, const char *, size_t);

 static void              bufferc(struct termp *, char);
 static void              adjbuf(struct termp *p, size_t);
 static void              encode(struct termp *, const char *, size_t);
 
 
 static void              bufferc(struct termp *, char);
 static void              adjbuf(struct termp *p, size_t);
 static void              encode(struct termp *, const char *, size_t);
 
 

-void *
-ascii_alloc(void)
+void
+term_free(struct termp *p)

 {
 
 {
 

-       return(term_alloc(TERMENC_ASCII));
+       if (p->buf)
+               free(p->buf);
+       if (p->symtab)
+               chars_free(p->symtab);
+
+       free(p);

 }
 
 
 void
 }
 
 
 void

-terminal_free(void *arg)
+term_begin(struct termp *p, term_margin head, 
+               term_margin foot, const void *arg)

 {
 
 {
 

-       term_free((struct termp *)arg);
+       p->headf = head;
+       p->footf = foot;
+       p->argf = arg;
+       (*p->begin)(p);

 }
 
 
 }
 
 

-static void
-term_free(struct termp *p)
+void
+term_end(struct termp *p)

 {
 
 {
 

-       if (p->buf)
-               free(p->buf);
-       if (p->symtab)
-               chars_free(p->symtab);
-
-       free(p);
+       (*p->end)(p);

 }
 
 
 }
 
 

-static struct termp *
+struct termp *

 term_alloc(enum termenc enc)
 {
 term_alloc(enum termenc enc)
 {

-       struct termp *p;
+       struct termp    *p;

 
        p = calloc(1, sizeof(struct termp));
        if (NULL == p) {
                perror(NULL);
 
        p = calloc(1, sizeof(struct termp));
        if (NULL == p) {
                perror(NULL);

-               exit(EXIT_FAILURE);
+               exit(MANDOCLEVEL_SYSERR);

        }
        }

+

        p->enc = enc;
        return(p);
 }
        p->enc = enc;
        return(p);
 }


@@ -129,11 +132,12 @@ term_flushln(struct termp *p)
        int              i;     /* current input position in p->buf */
        size_t           vis;   /* current visual position on output */
        size_t           vbl;   /* number of blanks to prepend to output */
        int              i;     /* current input position in p->buf */
        size_t           vis;   /* current visual position on output */
        size_t           vbl;   /* number of blanks to prepend to output */

-       size_t           vsz;   /* visual characters to write to output */
+       size_t           vend;  /* end of word visual position on output */

        size_t           bp;    /* visual right border position */
        size_t           bp;    /* visual right border position */

-       size_t           hyph;  /* visible position of hyphen */
-       int              j;     /* temporary loop index */
-       size_t           maxvis, mmax;
+       int              j;     /* temporary loop index for p->buf */
+       int              jhy;   /* last hyph before overflow w/r/t j */
+       size_t           maxvis; /* output position of visible boundary */
+       size_t           mmax; /* used in calculating bp */

 
        /*
         * First, establish the maximum columns of "visible" content.
 
        /*
         * First, establish the maximum columns of "visible" content.


@@ -153,100 +157,67 @@ term_flushln(struct termp *p)
 
        bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
 
 
        bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
 

-       /* 
-        * FIXME: if bp is zero, we still output the first word before
-        * breaking the line.
-        */
-
-       vis = 0;
-

        /*
        /*

-        * If in the standard case (left-justified), then begin with our
-        * indentation, otherwise (columns, etc.) just start spitting
-        * out text.
+        * Indent the first line of a paragraph.

         */
         */

+       vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;

 
 

-       if ( ! (p->flags & TERMP_NOLPAD))
-               /* LINTED */
-               for (j = 0; j < (int)p->offset; j++)
-                       putchar(' ');
+       vis = vend = i = 0;
+
+       while (i < (int)p->col) {
+               /*
+                * Handle literal tab characters: collapse all
+                * subsequent tabs into a single huge set of spaces.
+                */
+               while (i < (int)p->col && '\t' == p->buf[i]) {
+                       vend = (vis / p->tabwidth + 1) * p->tabwidth;
+                       vbl += vend - vis;
+                       vis = vend;
+                       i++;
+               }

 
 

-       for (i = 0; i < (int)p->col; i++) {

                /*
                 * Count up visible word characters.  Control sequences
                 * (starting with the CSI) aren't counted.  A space
                 * generates a non-printing word, which is valid (the
                 * space is printed according to regular spacing rules).
                /*
                 * Count up visible word characters.  Control sequences
                 * (starting with the CSI) aren't counted.  A space
                 * generates a non-printing word, which is valid (the
                 * space is printed according to regular spacing rules).

-                * Collect the number of printable characters until the
-                * first hyphen, if found.  Hyphens aren't included if
-                * they're the first character (so `Fl' doesn't break)
-                * or second consecutive character (`Fl -').

                 */
 
                /* LINTED */
                 */
 
                /* LINTED */

-               for (j = i, vsz = 0, hyph = 0; j < (int)p->col; j++) {
-                       if (j && ' ' == p->buf[j]) 
+               for (j = i, jhy = 0; j < (int)p->col; j++) {
+                       if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])

                                break;
                                break;

-                       if (8 == p->buf[j])
-                               vsz--;
-                       else
-                               vsz++;
-                       if (j > i && '-' == p->buf[j] && 0 == hyph)
-                              if ('-' != p->buf[j - 1])
-                                       hyph = vsz;
-               }

 
 

-               /*
-                * Choose the number of blanks to prepend: no blank at the
-                * beginning of a line, one between words -- but do not
-                * actually write them yet.
-                */
+                       /* Back over the the last printed character. */
+                       if (8 == p->buf[j]) {
+                               assert(j);
+                               vend -= (*p->width)(p, p->buf[j - 1]);
+                               continue;
+                       }

 
 

-               vbl = (size_t)(0 == vis ? 0 : 1);
+                       /* Regular word. */
+                       /* Break at the hyphen point if we overrun. */
+                       if (vend > vis && vend < bp && 
+                                       ASCII_HYPH == p->buf[j])
+                               jhy = j;
+
+                       vend += (*p->width)(p, p->buf[j]);
+               }

 
                /*
                 * Find out whether we would exceed the right margin.
 
                /*
                 * Find out whether we would exceed the right margin.

-                * If so, break to the next line, possibly after
-                * emittign character up to a hyphen.  Otherwise, write
-                * the chosen number of blanks.
+                * If so, break to the next line.

                 */
                 */

-
-               if (vis && vis + vbl + vsz > bp) {
-                       /*
-                        * Has a hyphen been found before the breakpoint
-                        * that we can use?
-                        */
-                       if (hyph && vis + vbl + hyph <= bp) {
-                               /* First prepend blanks. */
-                               for (j = 0; j < (int)vbl; j++)
-                                       putchar(' ');
-                               
-                               /* Emit up to the character. */
-                               do {
-                                       if (31 == p->buf[i])
-                                               putchar(' ');
-                                       else
-                                               putchar(p->buf[i]);
-                                       if (8 != p->buf[i])
-                                               vsz--;
-                               } while ('-' != p->buf[i++]);
-
-                               /* Emit trailing decoration. */
-                               if (8 == p->buf[i]) {
-                                       putchar(p->buf[i]);
-                                       putchar(p->buf[i + 1]);
-                               }
-                       } 
-
-                       putchar('\n');
+               if (vend > bp && 0 == jhy && vis > 0) {
+                       vend -= vis;
+                       (*p->endline)(p);

                        if (TERMP_NOBREAK & p->flags) {
                        if (TERMP_NOBREAK & p->flags) {

-                               for (j = 0; j < (int)p->rmargin; j++)
-                                       putchar(' ');
-                               vis = p->rmargin - p->offset;
+                               p->viscol = p->rmargin;
+                               (*p->advance)(p, p->rmargin);
+                               vend += p->rmargin - p->offset;

                        } else {
                        } else {

-                               for (j = 0; j < (int)p->offset; j++)
-                                       putchar(' ');
-                               vis = 0;
+                               p->viscol = 0;
+                               vbl = p->offset;

                        }
 
                        /* Remove the p->overstep width. */
                        }
 
                        /* Remove the p->overstep width. */


@@ -254,36 +225,68 @@ term_flushln(struct termp *p)
                        bp += (int)/* LINTED */
                                p->overstep;
                        p->overstep = 0;
                        bp += (int)/* LINTED */
                                p->overstep;
                        p->overstep = 0;

-               } else {
-                       for (j = 0; j < (int)vbl; j++)
-                               putchar(' ');
-                       vis += vbl;

                }
 
                /* Write out the [remaining] word. */
                }
 
                /* Write out the [remaining] word. */

-               for ( ; i < (int)p->col; i++)
-                       if (' ' == p->buf[i])
+               for ( ; i < (int)p->col; i++) {
+                       if (vend > bp && jhy > 0 && i > jhy)
+                               break;
+                       if ('\t' == p->buf[i])

                                break;
                                break;

-                       else if (31 == p->buf[i])
-                               putchar(' ');
-                       else
-                               putchar(p->buf[i]);
+                       if (' ' == p->buf[i]) {
+                               j = i;
+                               while (' ' == p->buf[i])
+                                       i++;
+                               vbl += (i - j) * (*p->width)(p, ' ');
+                               break;
+                       }
+                       if (ASCII_NBRSP == p->buf[i]) {
+                               vbl += (*p->width)(p, ' ');
+                               continue;
+                       }

 
 

-               vis += vsz;
+                       /*
+                        * Now we definitely know there will be
+                        * printable characters to output,
+                        * so write preceding white space now.
+                        */
+                       if (vbl) {
+                               (*p->advance)(p, vbl);
+                               p->viscol += vbl;
+                               vbl = 0;
+                       }
+
+                       if (ASCII_HYPH == p->buf[i]) {
+                               (*p->letter)(p, '-');
+                               p->viscol += (*p->width)(p, '-');
+                       } else {
+                               (*p->letter)(p, p->buf[i]);
+                               p->viscol += (*p->width)(p, p->buf[i]);
+                       }
+               }
+               vend += vbl;
+               vis = vend;

        }
 
        }
 

+       /*
+        * If there was trailing white space, it was not printed;
+        * so reset the cursor position accordingly.
+        */
+       vis -= vbl;
+

        p->col = 0;
        p->overstep = 0;
 
        if ( ! (TERMP_NOBREAK & p->flags)) {
        p->col = 0;
        p->overstep = 0;
 
        if ( ! (TERMP_NOBREAK & p->flags)) {

-               putchar('\n');
+               p->viscol = 0;
+               (*p->endline)(p);

                return;
        }
 
        if (TERMP_HANG & p->flags) {
                /* We need one blank after the tag. */
                p->overstep = /* LINTED */
                return;
        }
 
        if (TERMP_HANG & p->flags) {
                /* We need one blank after the tag. */
                p->overstep = /* LINTED */

-                       vis - maxvis + 1;
+                       vis - maxvis + (*p->width)(p, ' ');

 
                /*
                 * Behave exactly the same way as groff:
 
                /*
                 * Behave exactly the same way as groff:


@@ -307,13 +310,15 @@ term_flushln(struct termp *p)
 
        /* Right-pad. */
        if (maxvis > vis + /* LINTED */
 
        /* Right-pad. */
        if (maxvis > vis + /* LINTED */

-                       ((TERMP_TWOSPACE & p->flags) ? 1 : 0))  
-               for ( ; vis < maxvis; vis++)
-                       putchar(' ');
-       else {  /* ...or newline break. */
-               putchar('\n');
-               for (i = 0; i < (int)p->rmargin; i++)
-                       putchar(' ');
+                       ((TERMP_TWOSPACE & p->flags) ? 
+                        (*p->width)(p, ' ') : 0)) {
+               p->viscol += maxvis - vis;
+               (*p->advance)(p, maxvis - vis);
+               vis += (maxvis - vis);
+       } else {        /* ...or newline break. */
+               (*p->endline)(p);
+               p->viscol = p->rmargin;
+               (*p->advance)(p, p->rmargin);

        }
 }
 
        }
 }
 


@@ -328,7 +333,7 @@ term_newln(struct termp *p)
 {
 
        p->flags |= TERMP_NOSPACE;
 {
 
        p->flags |= TERMP_NOSPACE;

-       if (0 == p->col) {
+       if (0 == p->col && 0 == p->viscol) {

                p->flags &= ~TERMP_NOLPAD;
                return;
        }
                p->flags &= ~TERMP_NOLPAD;
                return;
        }


@@ -348,19 +353,22 @@ term_vspace(struct termp *p)
 {
 
        term_newln(p);
 {
 
        term_newln(p);

-       putchar('\n');
+       p->viscol = 0;
+       (*p->endline)(p);

 }
 
 
 static void
 }
 
 
 static void

-spec(struct termp *p, const char *word, size_t len)
+spec(struct termp *p, enum roffdeco d, const char *word, size_t len)

 {
        const char      *rhs;
        size_t           sz;
 
 {
        const char      *rhs;
        size_t           sz;
 

-       rhs = chars_a2ascii(p->symtab, word, len, &sz);
+       rhs = chars_spec2str(p->symtab, word, len, &sz);

        if (rhs) 
                encode(p, rhs, sz);
        if (rhs) 
                encode(p, rhs, sz);

+       else if (DECO_SSPECIAL == d)
+               encode(p, word, len);

 }
 
 
 }
 
 


@@ -370,7 +378,7 @@ res(struct termp *p, const char *word, size_t len)
        const char      *rhs;
        size_t           sz;
 
        const char      *rhs;
        size_t           sz;
 

-       rhs = chars_a2res(p->symtab, word, len, &sz);
+       rhs = chars_res2str(p->symtab, word, len, &sz);

        if (rhs)
                encode(p, rhs, sz);
 }
        if (rhs)
                encode(p, rhs, sz);
 }


@@ -480,20 +488,31 @@ term_word(struct termp *p, const char *word)
                        break;
                }
 
                        break;
                }
 

-       if ( ! (TERMP_NOSPACE & p->flags))
-               bufferc(p, ' ');
+       if ( ! (TERMP_NOSPACE & p->flags)) {
+               if ( ! (TERMP_KEEP & p->flags)) {
+                       if (TERMP_PREKEEP & p->flags)
+                               p->flags |= TERMP_KEEP;
+                       bufferc(p, ' ');
+                       if (TERMP_SENTENCE & p->flags)
+                               bufferc(p, ' ');
+               } else
+                       bufferc(p, ASCII_NBRSP);
+       }

 
        if ( ! (p->flags & TERMP_NONOSPACE))
                p->flags &= ~TERMP_NOSPACE;
 
        if ( ! (p->flags & TERMP_NONOSPACE))
                p->flags &= ~TERMP_NOSPACE;

+       else
+               p->flags |= TERMP_NOSPACE;

 
 

-       /* FIXME: use strcspn. */
+       p->flags &= ~TERMP_SENTENCE;

 
        while (*word) {
 
        while (*word) {

-               if ('\\' != *word) {
-                       encode(p, word, 1);
-                       word++;
+               if ((ssz = strcspn(word, "\\")) > 0)
+                       encode(p, word, ssz);
+
+               word += ssz;
+               if ('\\' != *word)

                        continue;
                        continue;

-               }

 
                seq = ++word;
                sz = a2roffdeco(&deco, &seq, &ssz);
 
                seq = ++word;
                sz = a2roffdeco(&deco, &seq, &ssz);


@@ -503,7 +522,9 @@ term_word(struct termp *p, const char *word)
                        res(p, seq, ssz);
                        break;
                case (DECO_SPECIAL):
                        res(p, seq, ssz);
                        break;
                case (DECO_SPECIAL):

-                       spec(p, seq, ssz);
+                       /* FALLTHROUGH */
+               case (DECO_SSPECIAL):
+                       spec(p, deco, seq, ssz);

                        break;
                case (DECO_BOLD):
                        term_fontrepl(p, TERMFONT_BOLD);
                        break;
                case (DECO_BOLD):
                        term_fontrepl(p, TERMFONT_BOLD);


@@ -526,10 +547,12 @@ term_word(struct termp *p, const char *word)
                        p->flags |= TERMP_NOSPACE;
        }
 
                        p->flags |= TERMP_NOSPACE;
        }
 

-       if (sv[0] && 0 == sv[1])
+       /* 
+        * Note that we don't process the pipe: the parser sees it as
+        * punctuation, but we don't in terms of typography.
+        */
+       if (sv[0] && '\0' == sv[1])

                switch (sv[0]) {
                switch (sv[0]) {

-               case('|'):
-                       /* FALLTHROUGH */

                case('('):
                        /* FALLTHROUGH */
                case('['):
                case('('):
                        /* FALLTHROUGH */
                case('['):


@@ -553,23 +576,11 @@ adjbuf(struct termp *p, size_t sz)
        p->buf = realloc(p->buf, p->maxcols);
        if (NULL == p->buf) {
                perror(NULL);
        p->buf = realloc(p->buf, p->maxcols);
        if (NULL == p->buf) {
                perror(NULL);

-               exit(EXIT_FAILURE);
+               exit(MANDOCLEVEL_SYSERR);

        }
 }
 
 
        }
 }
 
 

-static void
-buffera(struct termp *p, const char *word, size_t sz)
-{
-
-       if (p->col + sz >= p->maxcols) 
-               adjbuf(p, p->col + sz);
-
-       memcpy(&p->buf[(int)p->col], word, sz);
-       p->col += sz;
-}
-
-

 static void
 bufferc(struct termp *p, char c)
 {
 static void
 bufferc(struct termp *p, char c)
 {


@@ -594,29 +605,58 @@ encode(struct termp *p, const char *word, size_t sz)
         */
 
        if (TERMFONT_NONE == (f = term_fonttop(p))) {
         */
 
        if (TERMFONT_NONE == (f = term_fonttop(p))) {

-               buffera(p, word, sz);
+               if (p->col + sz >= p->maxcols) 
+                       adjbuf(p, p->col + sz);
+               memcpy(&p->buf[(int)p->col], word, sz);
+               p->col += sz;

                return;
        }
 
                return;
        }
 

+       /* Pre-buffer, assuming worst-case. */
+
+       if (p->col + 1 + (sz * 3) >= p->maxcols)
+               adjbuf(p, p->col + 1 + (sz * 3));
+

        for (i = 0; i < (int)sz; i++) {
                if ( ! isgraph((u_char)word[i])) {
        for (i = 0; i < (int)sz; i++) {
                if ( ! isgraph((u_char)word[i])) {

-                       bufferc(p, word[i]);
+                       p->buf[(int)p->col++] = word[i];

                        continue;
                }
 
                if (TERMFONT_UNDER == f)
                        continue;
                }
 
                if (TERMFONT_UNDER == f)

-                       bufferc(p, '_');
+                       p->buf[(int)p->col++] = '_';

                else
                else

-                       bufferc(p, word[i]);
+                       p->buf[(int)p->col++] = word[i];

 
 

-               bufferc(p, 8);
-               bufferc(p, word[i]);
+               p->buf[(int)p->col++] = 8;
+               p->buf[(int)p->col++] = word[i];

        }
 }
 
 
 size_t
        }
 }
 
 
 size_t

-term_vspan(const struct roffsu *su)
+term_len(const struct termp *p, size_t sz)
+{
+
+       return((*p->width)(p, ' ') * sz);
+}
+
+
+size_t
+term_strlen(const struct termp *p, const char *cp)
+{
+       size_t           sz;
+
+       for (sz = 0; *cp; cp++)
+               sz += (*p->width)(p, *cp);
+
+       return(sz);
+}
+
+
+/* ARGSUSED */
+size_t
+term_vspan(const struct termp *p, const struct roffsu *su)

 {
        double           r;
 
 {
        double           r;
 


@@ -652,41 +692,13 @@ term_vspan(const struct roffsu *su)
 
 
 size_t
 
 
 size_t

-term_hspan(const struct roffsu *su)
+term_hspan(const struct termp *p, const struct roffsu *su)

 {
 {

-       double           r;
-
-       /* XXX: CM, IN, and PT are approximations. */
-
-       switch (su->unit) {
-       case (SCALE_CM):
-               r = 4 * su->scale;
-               break;
-       case (SCALE_IN):
-               /* XXX: this is an approximation. */
-               r = 10 * su->scale;
-               break;
-       case (SCALE_PC):
-               r = (10 * su->scale) / 6;
-               break;
-       case (SCALE_PT):
-               r = (10 * su->scale) / 72;
-               break;
-       case (SCALE_MM):
-               r = su->scale / 1000; /* FIXME: double-check. */
-               break;
-       case (SCALE_VS):
-               r = su->scale * 2 - 1; /* FIXME: double-check. */
-               break;
-       default:
-               r = su->scale;
-               break;
-       }
+       double           v;

 
 

-       if (r < 0.0)
-               r = 0.0;
-       return((size_t)/* LINTED */
-                       r);
+       v = ((*p->hspan)(p, su));
+       if (v < 0.0)
+               v = 0.0;
+       return((size_t) /* LINTED */
+                       v);

 }
 }

-
-