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The st_size member of struct stat is off_t, which is signed,
[mandoc.git] / html.c
diff --git a/html.c b/html.c
index ae7c50b8d2a8677dcaf4abef0159acc58cd3fed5..487dacda947f931be42425df41f333e6dc435244 100644 (file)
--- a/html.c
+++ b/html.c
@@ -1,6 +1,7 @@
-/*     $Id: html.c,v 1.53 2009/10/03 15:08:09 kristaps Exp $ */
+/*     $Id: html.c,v 1.185 2015/01/21 20:33:25 schwarze Exp $ */
 /*
 /*
- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2011-2015 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
@@ -14,102 +15,151 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#include "config.h"
+
 #include <sys/types.h>
 #include <sys/types.h>
-#include <sys/queue.h>
 
 #include <assert.h>
 
 #include <assert.h>
-#include <err.h>
+#include <ctype.h>
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdio.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
-#include "chars.h"
+#include "mandoc.h"
+#include "mandoc_aux.h"
+#include "out.h"
 #include "html.h"
 #include "html.h"
-
-#define        DOCTYPE         "-//W3C//DTD HTML 4.01//EN"
-#define        DTD             "http://www.w3.org/TR/html4/strict.dtd"
+#include "main.h"
 
 struct htmldata {
 
 struct htmldata {
-       char             *name;
+       const char       *name;
        int               flags;
 #define        HTML_CLRLINE     (1 << 0)
 #define        HTML_NOSTACK     (1 << 1)
        int               flags;
 #define        HTML_CLRLINE     (1 << 0)
 #define        HTML_NOSTACK     (1 << 1)
+#define        HTML_AUTOCLOSE   (1 << 2) /* Tag has auto-closure. */
 };
 
 static const struct htmldata htmltags[TAG_MAX] = {
        {"html",        HTML_CLRLINE}, /* TAG_HTML */
        {"head",        HTML_CLRLINE}, /* TAG_HEAD */
        {"body",        HTML_CLRLINE}, /* TAG_BODY */
 };
 
 static const struct htmldata htmltags[TAG_MAX] = {
        {"html",        HTML_CLRLINE}, /* TAG_HTML */
        {"head",        HTML_CLRLINE}, /* TAG_HEAD */
        {"body",        HTML_CLRLINE}, /* TAG_BODY */
-       {"meta",        HTML_CLRLINE | HTML_NOSTACK}, /* TAG_META */
+       {"meta",        HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_META */
        {"title",       HTML_CLRLINE}, /* TAG_TITLE */
        {"div",         HTML_CLRLINE}, /* TAG_DIV */
        {"h1",          0}, /* TAG_H1 */
        {"h2",          0}, /* TAG_H2 */
        {"title",       HTML_CLRLINE}, /* TAG_TITLE */
        {"div",         HTML_CLRLINE}, /* TAG_DIV */
        {"h1",          0}, /* TAG_H1 */
        {"h2",          0}, /* TAG_H2 */
-       {"p",           HTML_CLRLINE}, /* TAG_P */
        {"span",        0}, /* TAG_SPAN */
        {"span",        0}, /* TAG_SPAN */
-       {"link",        HTML_CLRLINE | HTML_NOSTACK}, /* TAG_LINK */
-       {"br",          HTML_CLRLINE | HTML_NOSTACK}, /* TAG_LINK */
+       {"link",        HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_LINK */
+       {"br",          HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_BR */
        {"a",           0}, /* TAG_A */
        {"table",       HTML_CLRLINE}, /* TAG_TABLE */
        {"a",           0}, /* TAG_A */
        {"table",       HTML_CLRLINE}, /* TAG_TABLE */
-       {"col",         HTML_CLRLINE | HTML_NOSTACK}, /* TAG_COL */
+       {"tbody",       HTML_CLRLINE}, /* TAG_TBODY */
+       {"col",         HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_COL */
        {"tr",          HTML_CLRLINE}, /* TAG_TR */
        {"td",          HTML_CLRLINE}, /* TAG_TD */
        {"li",          HTML_CLRLINE}, /* TAG_LI */
        {"ul",          HTML_CLRLINE}, /* TAG_UL */
        {"ol",          HTML_CLRLINE}, /* TAG_OL */
        {"tr",          HTML_CLRLINE}, /* TAG_TR */
        {"td",          HTML_CLRLINE}, /* TAG_TD */
        {"li",          HTML_CLRLINE}, /* TAG_LI */
        {"ul",          HTML_CLRLINE}, /* TAG_UL */
        {"ol",          HTML_CLRLINE}, /* TAG_OL */
-       {"base",        HTML_CLRLINE | HTML_NOSTACK}, /* TAG_BASE */
+       {"dl",          HTML_CLRLINE}, /* TAG_DL */
+       {"dt",          HTML_CLRLINE}, /* TAG_DT */
+       {"dd",          HTML_CLRLINE}, /* TAG_DD */
+       {"blockquote",  HTML_CLRLINE}, /* TAG_BLOCKQUOTE */
+       {"pre",         HTML_CLRLINE }, /* TAG_PRE */
+       {"b",           0 }, /* TAG_B */
+       {"i",           0 }, /* TAG_I */
+       {"code",        0 }, /* TAG_CODE */
+       {"small",       0 }, /* TAG_SMALL */
+       {"style",       HTML_CLRLINE}, /* TAG_STYLE */
+       {"math",        HTML_CLRLINE}, /* TAG_MATH */
+       {"mrow",        0}, /* TAG_MROW */
+       {"mi",          0}, /* TAG_MI */
+       {"mo",          0}, /* TAG_MO */
+       {"msup",        0}, /* TAG_MSUP */
+       {"msub",        0}, /* TAG_MSUB */
+       {"msubsup",     0}, /* TAG_MSUBSUP */
+       {"mfrac",       0}, /* TAG_MFRAC */
+       {"msqrt",       0}, /* TAG_MSQRT */
+       {"mfenced",     0}, /* TAG_MFENCED */
+       {"mtable",      0}, /* TAG_MTABLE */
+       {"mtr",         0}, /* TAG_MTR */
+       {"mtd",         0}, /* TAG_MTD */
+       {"munderover",  0}, /* TAG_MUNDEROVER */
+       {"munder",      0}, /* TAG_MUNDER*/
+       {"mover",       0}, /* TAG_MOVER*/
+};
+
+static const char      *const htmlattrs[ATTR_MAX] = {
+       "name", /* ATTR_NAME */
+       "rel", /* ATTR_REL */
+       "href", /* ATTR_HREF */
+       "type", /* ATTR_TYPE */
+       "media", /* ATTR_MEDIA */
+       "class", /* ATTR_CLASS */
+       "style", /* ATTR_STYLE */
+       "id", /* ATTR_ID */
+       "colspan", /* ATTR_COLSPAN */
+       "charset", /* ATTR_CHARSET */
+       "open", /* ATTR_OPEN */
+       "close", /* ATTR_CLOSE */
+       "mathvariant", /* ATTR_MATHVARIANT */
 };
 
 };
 
-static const char       *const htmlattrs[ATTR_MAX] = {
-       "http-equiv",
-       "content",
-       "name",
-       "rel",
-       "href",
-       "type",
-       "media",
-       "class",
-       "style",
-       "width",
-       "valign",
+static const char      *const roffscales[SCALE_MAX] = {
+       "cm", /* SCALE_CM */
+       "in", /* SCALE_IN */
+       "pc", /* SCALE_PC */
+       "pt", /* SCALE_PT */
+       "em", /* SCALE_EM */
+       "em", /* SCALE_MM */
+       "ex", /* SCALE_EN */
+       "ex", /* SCALE_BU */
+       "em", /* SCALE_VS */
+       "ex", /* SCALE_FS */
 };
 
 };
 
-#ifdef __linux__
-extern int               getsubopt(char **, char * const *, char **);
-#endif
+static void     bufncat(struct html *, const char *, size_t);
+static void     print_ctag(struct html *, struct tag *);
+static int      print_escape(char);
+static int      print_encode(struct html *, const char *, int);
+static void     print_metaf(struct html *, enum mandoc_esc);
+static void     print_attr(struct html *, const char *, const char *);
+
 
 void *
 
 void *
-html_alloc(char *outopts)
+html_alloc(const struct mchars *mchars, char *outopts)
 {
        struct html     *h;
 {
        struct html     *h;
-       char            *toks[4], *v;
+       const char      *toks[5];
+       char            *v;
 
        toks[0] = "style";
        toks[1] = "man";
 
        toks[0] = "style";
        toks[1] = "man";
-       toks[2] = NULL;
-
-       if (NULL == (h = calloc(1, sizeof(struct html))))
-               return(NULL);
+       toks[2] = "includes";
+       toks[3] = "fragment";
+       toks[4] = NULL;
 
 
-       SLIST_INIT(&h->tags);
-       SLIST_INIT(&h->ords);
+       h = mandoc_calloc(1, sizeof(struct html));
 
 
-       if (NULL == (h->symtab = chars_init(CHARS_HTML))) {
-               free(h);
-               return(NULL);
-       }
-
-       h->base_man = "%N.%S.html";
+       h->tags.head = NULL;
+       h->symtab = mchars;
 
        while (outopts && *outopts)
 
        while (outopts && *outopts)
-               switch (getsubopt(&outopts, toks, &v)) {
-               case (0):
+               switch (getsubopt(&outopts, UNCONST(toks), &v)) {
+               case 0:
                        h->style = v;
                        break;
                        h->style = v;
                        break;
-               case (1):
+               case 1:
                        h->base_man = v;
                        break;
                        h->base_man = v;
                        break;
+               case 2:
+                       h->base_includes = v;
+                       break;
+               case 3:
+                       h->oflags |= HTML_FRAGMENT;
+                       break;
                default:
                        break;
                }
                default:
                        break;
                }
@@ -117,53 +167,43 @@ html_alloc(char *outopts)
        return(h);
 }
 
        return(h);
 }
 
-
 void
 html_free(void *p)
 {
        struct tag      *tag;
 void
 html_free(void *p)
 {
        struct tag      *tag;
-       struct ord      *ord;
        struct html     *h;
 
        h = (struct html *)p;
 
        struct html     *h;
 
        h = (struct html *)p;
 
-       while ( ! SLIST_EMPTY(&h->ords)) {
-               ord = SLIST_FIRST(&h->ords);
-               SLIST_REMOVE_HEAD(&h->ords, entry);
-               free(ord);
-       }
-
-       while ( ! SLIST_EMPTY(&h->tags)) {
-               tag = SLIST_FIRST(&h->tags);
-               SLIST_REMOVE_HEAD(&h->tags, entry);
+       while ((tag = h->tags.head) != NULL) {
+               h->tags.head = tag->next;
                free(tag);
        }
                free(tag);
        }
-       
-       if (h->buf)
-               free(h->buf);
-       if (h->symtab)
-               chars_free(h->symtab);
 
        free(h);
 }
 
 
        free(h);
 }
 
-
 void
 print_gen_head(struct html *h)
 {
        struct htmlpair  tag[4];
 void
 print_gen_head(struct html *h)
 {
        struct htmlpair  tag[4];
+       struct tag      *t;
 
 
-       tag[0].key = ATTR_HTTPEQUIV;
-       tag[0].val = "Content-Type";
-       tag[1].key = ATTR_CONTENT;
-       tag[1].val = "text/html; charset=utf-8";
-       print_otag(h, TAG_META, 2, tag);
-
-       tag[0].key = ATTR_NAME;
-       tag[0].val = "resource-type";
-       tag[1].key = ATTR_CONTENT;
-       tag[1].val = "document";
-       print_otag(h, TAG_META, 2, tag);
+       tag[0].key = ATTR_CHARSET;
+       tag[0].val = "utf-8";
+       print_otag(h, TAG_META, 1, tag);
+
+       /*
+        * Print a default style-sheet.
+        */
+       t = print_otag(h, TAG_STYLE, 0, NULL);
+       print_text(h, "table.head, table.foot { width: 100%; }\n"
+             "td.head-rtitle, td.foot-os { text-align: right; }\n"
+             "td.head-vol { text-align: center; }\n"
+             "table.foot td { width: 50%; }\n"
+             "table.head td { width: 33%; }\n"
+             "div.spacer { margin: 1em 0; }\n");
+       print_tagq(h, t);
 
        if (h->style) {
                tag[0].key = ATTR_REL;
 
        if (h->style) {
                tag[0].key = ATTR_REL;
@@ -178,309 +218,541 @@ print_gen_head(struct html *h)
        }
 }
 
        }
 }
 
-
-static void
-print_spec(struct html *h, const char *p, int len)
-{
-       const char      *rhs;
-       int              i;
-       size_t           sz;
-
-       rhs = chars_a2ascii(h->symtab, p, (size_t)len, &sz);
-
-       if (NULL == rhs) 
-               return;
-       for (i = 0; i < (int)sz; i++) 
-               putchar(rhs[i]);
-}
-
-
 static void
 static void
-print_res(struct html *h, const char *p, int len)
+print_metaf(struct html *h, enum mandoc_esc deco)
 {
 {
-       const char      *rhs;
-       int              i;
-       size_t           sz;
+       enum htmlfont    font;
+
+       switch (deco) {
+       case ESCAPE_FONTPREV:
+               font = h->metal;
+               break;
+       case ESCAPE_FONTITALIC:
+               font = HTMLFONT_ITALIC;
+               break;
+       case ESCAPE_FONTBOLD:
+               font = HTMLFONT_BOLD;
+               break;
+       case ESCAPE_FONTBI:
+               font = HTMLFONT_BI;
+               break;
+       case ESCAPE_FONT:
+               /* FALLTHROUGH */
+       case ESCAPE_FONTROMAN:
+               font = HTMLFONT_NONE;
+               break;
+       default:
+               abort();
+               /* NOTREACHED */
+       }
 
 
-       rhs = chars_a2res(h->symtab, p, (size_t)len, &sz);
+       if (h->metaf) {
+               print_tagq(h, h->metaf);
+               h->metaf = NULL;
+       }
 
 
-       if (NULL == rhs)
-               return;
-       for (i = 0; i < (int)sz; i++) 
-               putchar(rhs[i]);
+       h->metal = h->metac;
+       h->metac = font;
+
+       switch (font) {
+       case HTMLFONT_ITALIC:
+               h->metaf = print_otag(h, TAG_I, 0, NULL);
+               break;
+       case HTMLFONT_BOLD:
+               h->metaf = print_otag(h, TAG_B, 0, NULL);
+               break;
+       case HTMLFONT_BI:
+               h->metaf = print_otag(h, TAG_B, 0, NULL);
+               print_otag(h, TAG_I, 0, NULL);
+               break;
+       default:
+               break;
+       }
 }
 
 }
 
-
-static void
-print_escape(struct html *h, const char **p)
+int
+html_strlen(const char *cp)
 {
 {
-       int              j, type;
-       const char      *wp;
-
-       wp = *p;
-       type = 1;
-
-       if (0 == *(++wp)) {
-               *p = wp;
-               return;
-       }
-
-       if ('(' == *wp) {
-               wp++;
-               if (0 == *wp || 0 == *(wp + 1)) {
-                       *p = 0 == *wp ? wp : wp + 1;
-                       return;
-               }
-
-               print_spec(h, wp, 2);
-               *p = ++wp;
-               return;
-
-       } else if ('*' == *wp) {
-               if (0 == *(++wp)) {
-                       *p = wp;
-                       return;
-               }
-
-               switch (*wp) {
-               case ('('):
-                       wp++;
-                       if (0 == *wp || 0 == *(wp + 1)) {
-                               *p = 0 == *wp ? wp : wp + 1;
-                               return;
+       size_t           rsz;
+       int              skip, sz;
+
+       /*
+        * Account for escaped sequences within string length
+        * calculations.  This follows the logic in term_strlen() as we
+        * must calculate the width of produced strings.
+        * Assume that characters are always width of "1".  This is
+        * hacky, but it gets the job done for approximation of widths.
+        */
+
+       sz = 0;
+       skip = 0;
+       while (1) {
+               rsz = strcspn(cp, "\\");
+               if (rsz) {
+                       cp += rsz;
+                       if (skip) {
+                               skip = 0;
+                               rsz--;
                        }
                        }
-
-                       print_res(h, wp, 2);
-                       *p = ++wp;
-                       return;
-               case ('['):
-                       type = 0;
-                       break;
-               default:
-                       print_res(h, wp, 1);
-                       *p = wp;
-                       return;
+                       sz += rsz;
                }
                }
-       
-       } else if ('f' == *wp) {
-               if (0 == *(++wp)) {
-                       *p = wp;
-                       return;
-               }
-
-               switch (*wp) {
-               case ('B'):
-                       /* TODO */
+               if ('\0' == *cp)
                        break;
                        break;
-               case ('I'):
-                       /* TODO */
-                       break;
-               case ('P'):
+               cp++;
+               switch (mandoc_escape(&cp, NULL, NULL)) {
+               case ESCAPE_ERROR:
+                       return(sz);
+               case ESCAPE_UNICODE:
+                       /* FALLTHROUGH */
+               case ESCAPE_NUMBERED:
                        /* FALLTHROUGH */
                        /* FALLTHROUGH */
-               case ('R'):
-                       /* TODO */
+               case ESCAPE_SPECIAL:
+                       /* FALLTHROUGH */
+               case ESCAPE_OVERSTRIKE:
+                       if (skip)
+                               skip = 0;
+                       else
+                               sz++;
+                       break;
+               case ESCAPE_SKIPCHAR:
+                       skip = 1;
                        break;
                default:
                        break;
                }
                        break;
                default:
                        break;
                }
+       }
+       return(sz);
+}
 
 
-               *p = wp;
-               return;
+static int
+print_escape(char c)
+{
 
 
-       } else if ('[' != *wp) {
-               print_spec(h, wp, 1);
-               *p = wp;
-               return;
+       switch (c) {
+       case '<':
+               printf("&lt;");
+               break;
+       case '>':
+               printf("&gt;");
+               break;
+       case '&':
+               printf("&amp;");
+               break;
+       case '"':
+               printf("&quot;");
+               break;
+       case ASCII_NBRSP:
+               putchar('-');
+               break;
+       case ASCII_HYPH:
+               putchar('-');
+               /* FALLTHROUGH */
+       case ASCII_BREAK:
+               break;
+       default:
+               return(0);
        }
        }
+       return(1);
+}
 
 
-       wp++;
-       for (j = 0; *wp && ']' != *wp; wp++, j++)
-               /* Loop... */ ;
+static int
+print_encode(struct html *h, const char *p, int norecurse)
+{
+       size_t           sz;
+       int              c, len, nospace;
+       const char      *seq;
+       enum mandoc_esc  esc;
+       static const char rejs[9] = { '\\', '<', '>', '&', '"',
+               ASCII_NBRSP, ASCII_HYPH, ASCII_BREAK, '\0' };
+
+       nospace = 0;
+
+       while ('\0' != *p) {
+               if (HTML_SKIPCHAR & h->flags && '\\' != *p) {
+                       h->flags &= ~HTML_SKIPCHAR;
+                       p++;
+                       continue;
+               }
 
 
-       if (0 == *wp) {
-               *p = wp;
-               return;
-       }
+               sz = strcspn(p, rejs);
 
 
-       if (type)
-               print_spec(h, wp - j, j);
-       else
-               print_res(h, wp - j, j);
+               fwrite(p, 1, sz, stdout);
+               p += (int)sz;
 
 
-       *p = wp;
-}
+               if ('\0' == *p)
+                       break;
 
 
+               if (print_escape(*p++))
+                       continue;
 
 
-static void
-print_encode(struct html *h, const char *p)
-{
+               esc = mandoc_escape(&p, &seq, &len);
+               if (ESCAPE_ERROR == esc)
+                       break;
 
 
-       for (; *p; p++) {
-               if ('\\' == *p) {
-                       print_escape(h, &p);
+               switch (esc) {
+               case ESCAPE_FONT:
+                       /* FALLTHROUGH */
+               case ESCAPE_FONTPREV:
+                       /* FALLTHROUGH */
+               case ESCAPE_FONTBOLD:
+                       /* FALLTHROUGH */
+               case ESCAPE_FONTITALIC:
+                       /* FALLTHROUGH */
+               case ESCAPE_FONTBI:
+                       /* FALLTHROUGH */
+               case ESCAPE_FONTROMAN:
+                       if (0 == norecurse)
+                               print_metaf(h, esc);
+                       continue;
+               case ESCAPE_SKIPCHAR:
+                       h->flags |= HTML_SKIPCHAR;
                        continue;
                        continue;
+               default:
+                       break;
                }
                }
-               switch (*p) {
-               case ('<'):
-                       printf("&lt;");
+
+               if (h->flags & HTML_SKIPCHAR) {
+                       h->flags &= ~HTML_SKIPCHAR;
+                       continue;
+               }
+
+               switch (esc) {
+               case ESCAPE_UNICODE:
+                       /* Skip past "u" header. */
+                       c = mchars_num2uc(seq + 1, len - 1);
                        break;
                        break;
-               case ('>'):
-                       printf("&gt;");
+               case ESCAPE_NUMBERED:
+                       c = mchars_num2char(seq, len);
+                       if (c < 0)
+                               continue;
                        break;
                        break;
-               case ('&'):
-                       printf("&amp;");
+               case ESCAPE_SPECIAL:
+                       c = mchars_spec2cp(h->symtab, seq, len);
+                       if (c <= 0)
+                               continue;
                        break;
                        break;
-               default:
-                       putchar(*p);
+               case ESCAPE_NOSPACE:
+                       if ('\0' == *p)
+                               nospace = 1;
+                       continue;
+               case ESCAPE_OVERSTRIKE:
+                       if (len == 0)
+                               continue;
+                       c = seq[len - 1];
                        break;
                        break;
+               default:
+                       continue;
                }
                }
+               if ((c < 0x20 && c != 0x09) ||
+                   (c > 0x7E && c < 0xA0))
+                       c = 0xFFFD;
+               if (c > 0x7E)
+                       printf("&#%d;", c);
+               else if ( ! print_escape(c))
+                       putchar(c);
        }
        }
+
+       return(nospace);
 }
 
 }
 
+static void
+print_attr(struct html *h, const char *key, const char *val)
+{
+       printf(" %s=\"", key);
+       (void)print_encode(h, val, 1);
+       putchar('\"');
+}
 
 struct tag *
 
 struct tag *
-print_otag(struct html *h, enum htmltag tag, 
+print_otag(struct html *h, enum htmltag tag,
                int sz, const struct htmlpair *p)
 {
        int              i;
        struct tag      *t;
 
                int sz, const struct htmlpair *p)
 {
        int              i;
        struct tag      *t;
 
+       /* Push this tags onto the stack of open scopes. */
+
        if ( ! (HTML_NOSTACK & htmltags[tag].flags)) {
        if ( ! (HTML_NOSTACK & htmltags[tag].flags)) {
-               if (NULL == (t = malloc(sizeof(struct tag))))
-                       err(EXIT_FAILURE, "malloc");
+               t = mandoc_malloc(sizeof(struct tag));
                t->tag = tag;
                t->tag = tag;
-               SLIST_INSERT_HEAD(&h->tags, t, entry);
+               t->next = h->tags.head;
+               h->tags.head = t;
        } else
                t = NULL;
 
        if ( ! (HTML_NOSPACE & h->flags))
        } else
                t = NULL;
 
        if ( ! (HTML_NOSPACE & h->flags))
-               if ( ! (HTML_CLRLINE & htmltags[tag].flags))
-                       printf(" ");
+               if ( ! (HTML_CLRLINE & htmltags[tag].flags)) {
+                       /* Manage keeps! */
+                       if ( ! (HTML_KEEP & h->flags)) {
+                               if (HTML_PREKEEP & h->flags)
+                                       h->flags |= HTML_KEEP;
+                               putchar(' ');
+                       } else
+                               printf("&#160;");
+               }
+
+       if ( ! (h->flags & HTML_NONOSPACE))
+               h->flags &= ~HTML_NOSPACE;
+       else
+               h->flags |= HTML_NOSPACE;
+
+       /* Print out the tag name and attributes. */
 
        printf("<%s", htmltags[tag].name);
 
        printf("<%s", htmltags[tag].name);
-       for (i = 0; i < sz; i++) {
-               printf(" %s=\"", htmlattrs[p[i].key]);
-               assert(p->val);
-               print_encode(h, p[i].val);
-               printf("\"");
-       }
-       printf(">");
+       for (i = 0; i < sz; i++)
+               print_attr(h, htmlattrs[p[i].key], p[i].val);
+
+       /* Accommodate for "well-formed" singleton escaping. */
+
+       if (HTML_AUTOCLOSE & htmltags[tag].flags)
+               putchar('/');
+
+       putchar('>');
 
        h->flags |= HTML_NOSPACE;
 
        h->flags |= HTML_NOSPACE;
-       if (HTML_CLRLINE & htmltags[tag].flags)
-               h->flags |= HTML_NEWLINE;
-       else
-               h->flags &= ~HTML_NEWLINE;
+
+       if ((HTML_AUTOCLOSE | HTML_CLRLINE) & htmltags[tag].flags)
+               putchar('\n');
 
        return(t);
 }
 
 
        return(t);
 }
 
-
-/* ARGSUSED */
 static void
 static void
-print_ctag(struct html *h, enum htmltag tag)
+print_ctag(struct html *h, struct tag *tag)
 {
 {
-       
-       printf("</%s>", htmltags[tag].name);
-       if (HTML_CLRLINE & htmltags[tag].flags)
+
+       /*
+        * Remember to close out and nullify the current
+        * meta-font and table, if applicable.
+        */
+       if (tag == h->metaf)
+               h->metaf = NULL;
+       if (tag == h->tblt)
+               h->tblt = NULL;
+
+       printf("</%s>", htmltags[tag->tag].name);
+       if (HTML_CLRLINE & htmltags[tag->tag].flags) {
                h->flags |= HTML_NOSPACE;
                h->flags |= HTML_NOSPACE;
-       if (HTML_CLRLINE & htmltags[tag].flags)
-               h->flags |= HTML_NEWLINE;
-       else
-               h->flags &= ~HTML_NEWLINE;
-}
+               putchar('\n');
+       }
 
 
+       h->tags.head = tag->next;
+       free(tag);
+}
 
 
-/* ARGSUSED */
 void
 void
-print_gen_doctype(struct html *h)
+print_gen_decls(struct html *h)
 {
 {
-       
-       printf("<!DOCTYPE HTML PUBLIC \"%s\" \"%s\">", DOCTYPE, DTD);
-}
 
 
+       puts("<!DOCTYPE html>");
+}
 
 void
 
 void
-print_text(struct html *h, const char *p)
+print_text(struct html *h, const char *word)
 {
 
 {
 
-       if (*p && 0 == *(p + 1))
-               switch (*p) {
-               case('.'):
-                       /* FALLTHROUGH */
-               case(','):
-                       /* FALLTHROUGH */
-               case(';'):
-                       /* FALLTHROUGH */
-               case(':'):
-                       /* FALLTHROUGH */
-               case('?'):
-                       /* FALLTHROUGH */
-               case('!'):
-                       /* FALLTHROUGH */
-               case(')'):
-                       /* FALLTHROUGH */
-               case(']'):
-                       /* FALLTHROUGH */
-               case('}'):
-                       if ( ! (HTML_IGNDELIM & h->flags))
-                               h->flags |= HTML_NOSPACE;
-                       break;
-               default:
-                       break;
-               }
+       if ( ! (HTML_NOSPACE & h->flags)) {
+               /* Manage keeps! */
+               if ( ! (HTML_KEEP & h->flags)) {
+                       if (HTML_PREKEEP & h->flags)
+                               h->flags |= HTML_KEEP;
+                       putchar(' ');
+               } else
+                       printf("&#160;");
+       }
 
 
-       if ( ! (h->flags & HTML_NOSPACE))
-               printf(" ");
+       assert(NULL == h->metaf);
+       switch (h->metac) {
+       case HTMLFONT_ITALIC:
+               h->metaf = print_otag(h, TAG_I, 0, NULL);
+               break;
+       case HTMLFONT_BOLD:
+               h->metaf = print_otag(h, TAG_B, 0, NULL);
+               break;
+       case HTMLFONT_BI:
+               h->metaf = print_otag(h, TAG_B, 0, NULL);
+               print_otag(h, TAG_I, 0, NULL);
+               break;
+       default:
+               break;
+       }
 
 
-       h->flags &= ~HTML_NOSPACE;
-       h->flags &= ~HTML_NEWLINE;
+       assert(word);
+       if ( ! print_encode(h, word, 0)) {
+               if ( ! (h->flags & HTML_NONOSPACE))
+                       h->flags &= ~HTML_NOSPACE;
+               h->flags &= ~HTML_NONEWLINE;
+       } else
+               h->flags |= HTML_NOSPACE | HTML_NONEWLINE;
 
 
-       if (p)
-               print_encode(h, p);
+       if (h->metaf) {
+               print_tagq(h, h->metaf);
+               h->metaf = NULL;
+       }
 
 
-       if (*p && 0 == *(p + 1))
-               switch (*p) {
-               case('('):
-                       /* FALLTHROUGH */
-               case('['):
-                       /* FALLTHROUGH */
-               case('{'):
-                       h->flags |= HTML_NOSPACE;
-                       break;
-               default:
-                       break;
-               }
+       h->flags &= ~HTML_IGNDELIM;
 }
 
 }
 
-
 void
 print_tagq(struct html *h, const struct tag *until)
 {
        struct tag      *tag;
 
 void
 print_tagq(struct html *h, const struct tag *until)
 {
        struct tag      *tag;
 
-       while ( ! SLIST_EMPTY(&h->tags)) {
-               tag = SLIST_FIRST(&h->tags);
-               print_ctag(h, tag->tag);
-               SLIST_REMOVE_HEAD(&h->tags, entry);
-               free(tag);
+       while ((tag = h->tags.head) != NULL) {
+               print_ctag(h, tag);
                if (until && tag == until)
                        return;
        }
 }
 
                if (until && tag == until)
                        return;
        }
 }
 
-
 void
 print_stagq(struct html *h, const struct tag *suntil)
 {
        struct tag      *tag;
 
 void
 print_stagq(struct html *h, const struct tag *suntil)
 {
        struct tag      *tag;
 
-       while ( ! SLIST_EMPTY(&h->tags)) {
-               tag = SLIST_FIRST(&h->tags);
+       while ((tag = h->tags.head) != NULL) {
                if (suntil && tag == suntil)
                        return;
                if (suntil && tag == suntil)
                        return;
-               print_ctag(h, tag->tag);
-               SLIST_REMOVE_HEAD(&h->tags, entry);
-               free(tag);
+               print_ctag(h, tag);
        }
 }
        }
 }
+
+void
+print_paragraph(struct html *h)
+{
+       struct tag      *t;
+       struct htmlpair  tag;
+
+       PAIR_CLASS_INIT(&tag, "spacer");
+       t = print_otag(h, TAG_DIV, 1, &tag);
+       print_tagq(h, t);
+}
+
+
+void
+bufinit(struct html *h)
+{
+
+       h->buf[0] = '\0';
+       h->buflen = 0;
+}
+
+void
+bufcat_style(struct html *h, const char *key, const char *val)
+{
+
+       bufcat(h, key);
+       bufcat(h, ":");
+       bufcat(h, val);
+       bufcat(h, ";");
+}
+
+void
+bufcat(struct html *h, const char *p)
+{
+
+       /*
+        * XXX This is broken and not easy to fix.
+        * When using the -Oincludes option, buffmt_includes()
+        * may pass in strings overrunning BUFSIZ, causing a crash.
+        */
+
+       h->buflen = strlcat(h->buf, p, BUFSIZ);
+       assert(h->buflen < BUFSIZ);
+}
+
+void
+bufcat_fmt(struct html *h, const char *fmt, ...)
+{
+       va_list          ap;
+
+       va_start(ap, fmt);
+       (void)vsnprintf(h->buf + (int)h->buflen,
+           BUFSIZ - h->buflen - 1, fmt, ap);
+       va_end(ap);
+       h->buflen = strlen(h->buf);
+}
+
+static void
+bufncat(struct html *h, const char *p, size_t sz)
+{
+
+       assert(h->buflen + sz + 1 < BUFSIZ);
+       strncat(h->buf, p, sz);
+       h->buflen += sz;
+}
+
+void
+buffmt_includes(struct html *h, const char *name)
+{
+       const char      *p, *pp;
+
+       pp = h->base_includes;
+
+       bufinit(h);
+       while (NULL != (p = strchr(pp, '%'))) {
+               bufncat(h, pp, (size_t)(p - pp));
+               switch (*(p + 1)) {
+               case'I':
+                       bufcat(h, name);
+                       break;
+               default:
+                       bufncat(h, p, 2);
+                       break;
+               }
+               pp = p + 2;
+       }
+       if (pp)
+               bufcat(h, pp);
+}
+
+void
+buffmt_man(struct html *h, const char *name, const char *sec)
+{
+       const char      *p, *pp;
+
+       pp = h->base_man;
+
+       bufinit(h);
+       while (NULL != (p = strchr(pp, '%'))) {
+               bufncat(h, pp, (size_t)(p - pp));
+               switch (*(p + 1)) {
+               case 'S':
+                       bufcat(h, sec ? sec : "1");
+                       break;
+               case 'N':
+                       bufcat_fmt(h, "%s", name);
+                       break;
+               default:
+                       bufncat(h, p, 2);
+                       break;
+               }
+               pp = p + 2;
+       }
+       if (pp)
+               bufcat(h, pp);
+}
+
+void
+bufcat_su(struct html *h, const char *p, const struct roffsu *su)
+{
+       double           v;
+
+       v = su->scale;
+       if (SCALE_MM == su->unit && 0.0 == (v /= 100.0))
+               v = 1.0;
+       else if (SCALE_BU == su->unit)
+               v /= 24.0;
+
+       bufcat_fmt(h, "%s: %.2f%s;", p, v, roffscales[su->unit]);
+}
+
+void
+bufcat_id(struct html *h, const char *src)
+{
+
+       /* Cf. <http://www.w3.org/TR/html4/types.html#h-6.2>. */
+
+       while ('\0' != *src)
+               bufcat_fmt(h, "%.2x", *src++);
+}
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