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-/*     $Id: man_html.c,v 1.2 2009/10/03 15:08:09 kristaps Exp $ */
+/*     $Id: man_html.c,v 1.174 2019/04/30 15:53:00 schwarze Exp $ */
 /*
- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2013-2015, 2017-2019 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
  * copyright notice and this permission notice appear in all copies.
  *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * 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/queue.h>
 
+#include <assert.h>
+#include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
-#include "html.h"
+#include "mandoc_aux.h"
+#include "mandoc.h"
+#include "roff.h"
 #include "man.h"
+#include "out.h"
+#include "html.h"
+#include "main.h"
+
+#define        MAN_ARGS          const struct roff_meta *man, \
+                         const struct roff_node *n, \
+                         struct html *h
+
+struct man_html_act {
+       int             (*pre)(MAN_ARGS);
+       int             (*post)(MAN_ARGS);
+};
+
+static void              print_man_head(const struct roff_meta *,
+                               struct html *);
+static void              print_man_nodelist(MAN_ARGS);
+static void              print_man_node(MAN_ARGS);
+static char              list_continues(const struct roff_node *,
+                               const struct roff_node *);
+static int               man_B_pre(MAN_ARGS);
+static int               man_IP_pre(MAN_ARGS);
+static int               man_I_pre(MAN_ARGS);
+static int               man_OP_pre(MAN_ARGS);
+static int               man_PP_pre(MAN_ARGS);
+static int               man_RS_pre(MAN_ARGS);
+static int               man_SH_pre(MAN_ARGS);
+static int               man_SM_pre(MAN_ARGS);
+static int               man_SY_pre(MAN_ARGS);
+static int               man_UR_pre(MAN_ARGS);
+static int               man_abort_pre(MAN_ARGS);
+static int               man_alt_pre(MAN_ARGS);
+static int               man_ign_pre(MAN_ARGS);
+static int               man_in_pre(MAN_ARGS);
+static void              man_root_post(const struct roff_meta *,
+                               struct html *);
+static void              man_root_pre(const struct roff_meta *,
+                               struct html *);
+
+static const struct man_html_act man_html_acts[MAN_MAX - MAN_TH] = {
+       { NULL, NULL }, /* TH */
+       { man_SH_pre, NULL }, /* SH */
+       { man_SH_pre, NULL }, /* SS */
+       { man_IP_pre, NULL }, /* TP */
+       { man_IP_pre, NULL }, /* TQ */
+       { man_abort_pre, NULL }, /* LP */
+       { man_PP_pre, NULL }, /* PP */
+       { man_abort_pre, NULL }, /* P */
+       { man_IP_pre, NULL }, /* IP */
+       { man_PP_pre, NULL }, /* HP */
+       { man_SM_pre, NULL }, /* SM */
+       { man_SM_pre, NULL }, /* SB */
+       { man_alt_pre, NULL }, /* BI */
+       { man_alt_pre, NULL }, /* IB */
+       { man_alt_pre, NULL }, /* BR */
+       { man_alt_pre, NULL }, /* RB */
+       { NULL, NULL }, /* R */
+       { man_B_pre, NULL }, /* B */
+       { man_I_pre, NULL }, /* I */
+       { man_alt_pre, NULL }, /* IR */
+       { man_alt_pre, NULL }, /* RI */
+       { NULL, NULL }, /* RE */
+       { man_RS_pre, NULL }, /* RS */
+       { man_ign_pre, NULL }, /* DT */
+       { man_ign_pre, NULL }, /* UC */
+       { man_ign_pre, NULL }, /* PD */
+       { man_ign_pre, NULL }, /* AT */
+       { man_in_pre, NULL }, /* in */
+       { man_SY_pre, NULL }, /* SY */
+       { NULL, NULL }, /* YS */
+       { man_OP_pre, NULL }, /* OP */
+       { NULL, NULL }, /* EX */
+       { NULL, NULL }, /* EE */
+       { man_UR_pre, NULL }, /* UR */
+       { NULL, NULL }, /* UE */
+       { man_UR_pre, NULL }, /* MT */
+       { NULL, NULL }, /* ME */
+};
 
 
-/* ARGSUSED */
 void
-html_man(void *arg, const struct man *m)
+html_man(void *arg, const struct roff_meta *man)
+{
+       struct html             *h;
+       struct roff_node        *n;
+       struct tag              *t;
+
+       h = (struct html *)arg;
+       n = man->first->child;
+
+       if ((h->oflags & HTML_FRAGMENT) == 0) {
+               print_gen_decls(h);
+               print_otag(h, TAG_HTML, "");
+               if (n != NULL && n->type == ROFFT_COMMENT)
+                       print_gen_comment(h, n);
+               t = print_otag(h, TAG_HEAD, "");
+               print_man_head(man, h);
+               print_tagq(h, t);
+               print_otag(h, TAG_BODY, "");
+       }
+
+       man_root_pre(man, h);
+       t = print_otag(h, TAG_DIV, "c", "manual-text");
+       print_man_nodelist(man, n, h);
+       print_tagq(h, t);
+       man_root_post(man, h);
+       print_tagq(h, NULL);
+}
+
+static void
+print_man_head(const struct roff_meta *man, struct html *h)
+{
+       char    *cp;
+
+       print_gen_head(h);
+       mandoc_asprintf(&cp, "%s(%s)", man->title, man->msec);
+       print_otag(h, TAG_TITLE, "");
+       print_text(h, cp);
+       free(cp);
+}
+
+static void
+print_man_nodelist(MAN_ARGS)
+{
+       while (n != NULL) {
+               print_man_node(man, n, h);
+               n = n->next;
+       }
+}
+
+static void
+print_man_node(MAN_ARGS)
+{
+       struct tag      *t;
+       int              child;
+
+       if (n->type == ROFFT_COMMENT || n->flags & NODE_NOPRT)
+               return;
+
+       html_fillmode(h, n->flags & NODE_NOFILL ? ROFF_nf : ROFF_fi);
+
+       child = 1;
+       switch (n->type) {
+       case ROFFT_TEXT:
+               if (*n->string == '\0') {
+                       print_endline(h);
+                       return;
+               }
+               if (*n->string == ' ' && n->flags & NODE_LINE &&
+                   (h->flags & HTML_NONEWLINE) == 0)
+                       print_endline(h);
+               else if (n->flags & NODE_DELIMC)
+                       h->flags |= HTML_NOSPACE;
+               t = h->tag;
+               t->refcnt++;
+               print_text(h, n->string);
+               break;
+       case ROFFT_EQN:
+               t = h->tag;
+               t->refcnt++;
+               print_eqn(h, n->eqn);
+               break;
+       case ROFFT_TBL:
+               /*
+                * This will take care of initialising all of the table
+                * state data for the first table, then tearing it down
+                * for the last one.
+                */
+               print_tbl(h, n->span);
+               return;
+       default:
+               /*
+                * Close out scope of font prior to opening a macro
+                * scope.
+                */
+               if (h->metac != ESCAPE_FONTROMAN) {
+                       h->metal = h->metac;
+                       h->metac = ESCAPE_FONTROMAN;
+               }
+
+               /*
+                * Close out the current table, if it's open, and unset
+                * the "meta" table state.  This will be reopened on the
+                * next table element.
+                */
+               if (h->tblt != NULL)
+                       print_tblclose(h);
+               t = h->tag;
+               t->refcnt++;
+               if (n->tok < ROFF_MAX) {
+                       roff_html_pre(h, n);
+                       t->refcnt--;
+                       print_stagq(h, t);
+                       return;
+               }
+               assert(n->tok >= MAN_TH && n->tok < MAN_MAX);
+               if (man_html_acts[n->tok - MAN_TH].pre != NULL)
+                       child = (*man_html_acts[n->tok - MAN_TH].pre)(man,
+                           n, h);
+               break;
+       }
+
+       if (child && n->child != NULL)
+               print_man_nodelist(man, n->child, h);
+
+       /* This will automatically close out any font scope. */
+       t->refcnt--;
+       if (n->type == ROFFT_BLOCK &&
+           (n->tok == MAN_IP || n->tok == MAN_TP || n->tok == MAN_TQ)) {
+               t = h->tag;
+               while (t->tag != TAG_DL && t->tag != TAG_UL)
+                       t = t->next;
+               /*
+                * Close the list if no further item of the same type
+                * follows; otherwise, close the item only.
+                */
+               if (list_continues(n, n->next) == '\0') {
+                       print_tagq(h, t);
+                       t = NULL;
+               }
+       }
+       if (t != NULL)
+               print_stagq(h, t);
+
+       if (n->flags & NODE_NOFILL && n->tok != MAN_YS &&
+           (n->next != NULL && n->next->flags & NODE_LINE)) {
+               /* In .nf = <pre>, print even empty lines. */
+               h->col++;
+               print_endline(h);
+       }
+}
+
+static void
+man_root_pre(const struct roff_meta *man, struct html *h)
+{
+       struct tag      *t, *tt;
+       char            *title;
+
+       assert(man->title);
+       assert(man->msec);
+       mandoc_asprintf(&title, "%s(%s)", man->title, man->msec);
+
+       t = print_otag(h, TAG_TABLE, "c", "head");
+       tt = print_otag(h, TAG_TR, "");
+
+       print_otag(h, TAG_TD, "c", "head-ltitle");
+       print_text(h, title);
+       print_stagq(h, tt);
+
+       print_otag(h, TAG_TD, "c", "head-vol");
+       if (man->vol != NULL)
+               print_text(h, man->vol);
+       print_stagq(h, tt);
+
+       print_otag(h, TAG_TD, "c", "head-rtitle");
+       print_text(h, title);
+       print_tagq(h, t);
+       free(title);
+}
+
+static void
+man_root_post(const struct roff_meta *man, struct html *h)
+{
+       struct tag      *t, *tt;
+
+       t = print_otag(h, TAG_TABLE, "c", "foot");
+       tt = print_otag(h, TAG_TR, "");
+
+       print_otag(h, TAG_TD, "c", "foot-date");
+       print_text(h, man->date);
+       print_stagq(h, tt);
+
+       print_otag(h, TAG_TD, "c", "foot-os");
+       if (man->os != NULL)
+               print_text(h, man->os);
+       print_tagq(h, t);
+}
+
+static int
+man_SH_pre(MAN_ARGS)
+{
+       const char      *class;
+       char            *id;
+       enum htmltag     tag;
+
+       if (n->tok == MAN_SH) {
+               tag = TAG_H1;
+               class = "Sh";
+       } else {
+               tag = TAG_H2;
+               class = "Ss";
+       }
+       switch (n->type) {
+       case ROFFT_BLOCK:
+               html_close_paragraph(h);
+               print_otag(h, TAG_SECTION, "c", class);
+               break;
+       case ROFFT_HEAD:
+               id = html_make_id(n, 1);
+               print_otag(h, tag, "ci", class, id);
+               if (id != NULL)
+                       print_otag(h, TAG_A, "chR", "permalink", id);
+               break;
+       case ROFFT_BODY:
+               break;
+       default:
+               abort();
+       }
+       return 1;
+}
+
+static int
+man_alt_pre(MAN_ARGS)
+{
+       const struct roff_node  *nn;
+       struct tag      *t;
+       int              i;
+       enum htmltag     fp;
+
+       for (i = 0, nn = n->child; nn != NULL; nn = nn->next, i++) {
+               switch (n->tok) {
+               case MAN_BI:
+                       fp = i % 2 ? TAG_I : TAG_B;
+                       break;
+               case MAN_IB:
+                       fp = i % 2 ? TAG_B : TAG_I;
+                       break;
+               case MAN_RI:
+                       fp = i % 2 ? TAG_I : TAG_MAX;
+                       break;
+               case MAN_IR:
+                       fp = i % 2 ? TAG_MAX : TAG_I;
+                       break;
+               case MAN_BR:
+                       fp = i % 2 ? TAG_MAX : TAG_B;
+                       break;
+               case MAN_RB:
+                       fp = i % 2 ? TAG_B : TAG_MAX;
+                       break;
+               default:
+                       abort();
+               }
+
+               if (i)
+                       h->flags |= HTML_NOSPACE;
+
+               if (fp != TAG_MAX)
+                       t = print_otag(h, fp, "");
+
+               print_text(h, nn->string);
+
+               if (fp != TAG_MAX)
+                       print_tagq(h, t);
+       }
+       return 0;
+}
+
+static int
+man_SM_pre(MAN_ARGS)
+{
+       print_otag(h, TAG_SMALL, "");
+       if (n->tok == MAN_SB)
+               print_otag(h, TAG_B, "");
+       return 1;
+}
+
+static int
+man_PP_pre(MAN_ARGS)
+{
+       switch (n->type) {
+       case ROFFT_BLOCK:
+               html_close_paragraph(h);
+               break;
+       case ROFFT_HEAD:
+               return 0;
+       case ROFFT_BODY:
+               if (n->child != NULL &&
+                   (n->child->flags & NODE_NOFILL) == 0)
+                       print_otag(h, TAG_P, "c",
+                           n->tok == MAN_PP ? "Pp" : "Pp HP");
+               break;
+       default:
+               abort();
+       }
+       return 1;
+}
+
+static char
+list_continues(const struct roff_node *n1, const struct roff_node *n2)
+{
+       const char *s1, *s2;
+       char c1, c2;
+
+       if (n1 == NULL || n1->type != ROFFT_BLOCK ||
+           n2 == NULL || n2->type != ROFFT_BLOCK)
+               return '\0';
+       if ((n1->tok == MAN_TP || n1->tok == MAN_TQ) &&
+           (n2->tok == MAN_TP || n2->tok == MAN_TQ))
+               return ' ';
+       if (n1->tok != MAN_IP || n2->tok != MAN_IP)
+               return '\0';
+       n1 = n1->head->child;
+       n2 = n2->head->child;
+       s1 = n1 == NULL ? "" : n1->string;
+       s2 = n2 == NULL ? "" : n2->string;
+       c1 = strcmp(s1, "*") == 0 ? '*' :
+            strcmp(s1, "\\-") == 0 ? '-' :
+            strcmp(s1, "\\(bu") == 0 ? 'b' : ' ';
+       c2 = strcmp(s2, "*") == 0 ? '*' :
+            strcmp(s2, "\\-") == 0 ? '-' :
+            strcmp(s2, "\\(bu") == 0 ? 'b' : ' ';
+       return c1 != c2 ? '\0' : c1 == 'b' ? '*' : c1;
+}
+
+static int
+man_IP_pre(MAN_ARGS)
+{
+       const struct roff_node  *nn;
+       const char              *list_class;
+       enum htmltag             list_elem, body_elem;
+       char                     list_type;
+
+       nn = n->type == ROFFT_BLOCK ? n : n->parent;
+       if ((list_type = list_continues(nn->prev, nn)) == '\0') {
+               /* Start a new list. */
+               if ((list_type = list_continues(nn, nn->next)) == '\0')
+                       list_type = ' ';
+               switch (list_type) {
+               case ' ':
+                       list_class = "Bl-tag";
+                       list_elem = TAG_DL;
+                       break;
+               case '*':
+                       list_class = "Bl-bullet";
+                       list_elem = TAG_UL;
+                       break;
+               case '-':
+                       list_class = "Bl-dash";
+                       list_elem = TAG_UL;
+                       break;
+               default:
+                       abort();
+               }
+       } else {
+               /* Continue a list that was started earlier. */
+               list_class = NULL;
+               list_elem = TAG_MAX;
+       }
+       body_elem = list_type == ' ' ? TAG_DD : TAG_LI;
+
+       switch (n->type) {
+       case ROFFT_BLOCK:
+               html_close_paragraph(h);
+               if (list_elem != TAG_MAX)
+                       print_otag(h, list_elem, "c", list_class);
+               return 1;
+       case ROFFT_HEAD:
+               if (body_elem == TAG_LI)
+                       return 0;
+               print_otag(h, TAG_DT, "");
+               break;
+       case ROFFT_BODY:
+               print_otag(h, body_elem, "");
+               return 1;
+       default:
+               abort();
+       }
+
+       switch(n->tok) {
+       case MAN_IP:  /* Only print the first header element. */
+               if (n->child != NULL)
+                       print_man_node(man, n->child, h);
+               break;
+       case MAN_TP:  /* Only print next-line header elements. */
+       case MAN_TQ:
+               nn = n->child;
+               while (nn != NULL && (NODE_LINE & nn->flags) == 0)
+                       nn = nn->next;
+               while (nn != NULL) {
+                       print_man_node(man, nn, h);
+                       nn = nn->next;
+               }
+               break;
+       default:
+               abort();
+       }
+       return 0;
+}
+
+static int
+man_OP_pre(MAN_ARGS)
+{
+       struct tag      *tt;
+
+       print_text(h, "[");
+       h->flags |= HTML_NOSPACE;
+       tt = print_otag(h, TAG_SPAN, "c", "Op");
+
+       if ((n = n->child) != NULL) {
+               print_otag(h, TAG_B, "");
+               print_text(h, n->string);
+       }
+
+       print_stagq(h, tt);
+
+       if (n != NULL && n->next != NULL) {
+               print_otag(h, TAG_I, "");
+               print_text(h, n->next->string);
+       }
+
+       print_stagq(h, tt);
+       h->flags |= HTML_NOSPACE;
+       print_text(h, "]");
+       return 0;
+}
+
+static int
+man_B_pre(MAN_ARGS)
+{
+       print_otag(h, TAG_B, "");
+       return 1;
+}
+
+static int
+man_I_pre(MAN_ARGS)
+{
+       print_otag(h, TAG_I, "");
+       return 1;
+}
+
+static int
+man_in_pre(MAN_ARGS)
+{
+       print_otag(h, TAG_BR, "");
+       return 0;
+}
+
+static int
+man_ign_pre(MAN_ARGS)
+{
+       return 0;
+}
+
+static int
+man_RS_pre(MAN_ARGS)
+{
+       switch (n->type) {
+       case ROFFT_BLOCK:
+               html_close_paragraph(h);
+               break;
+       case ROFFT_HEAD:
+               return 0;
+       case ROFFT_BODY:
+               print_otag(h, TAG_DIV, "c", "Bd-indent");
+               break;
+       default:
+               abort();
+       }
+       return 1;
+}
+
+static int
+man_SY_pre(MAN_ARGS)
+{
+       switch (n->type) {
+       case ROFFT_BLOCK:
+               html_close_paragraph(h);
+               print_otag(h, TAG_TABLE, "c", "Nm");
+               print_otag(h, TAG_TR, "");
+               break;
+       case ROFFT_HEAD:
+               print_otag(h, TAG_TD, "");
+               print_otag(h, TAG_CODE, "c", "Nm");
+               break;
+       case ROFFT_BODY:
+               print_otag(h, TAG_TD, "");
+               break;
+       default:
+               abort();
+       }
+       return 1;
+}
+
+static int
+man_UR_pre(MAN_ARGS)
+{
+       char *cp;
+
+       n = n->child;
+       assert(n->type == ROFFT_HEAD);
+       if (n->child != NULL) {
+               assert(n->child->type == ROFFT_TEXT);
+               if (n->tok == MAN_MT) {
+                       mandoc_asprintf(&cp, "mailto:%s", n->child->string);
+                       print_otag(h, TAG_A, "ch", "Mt", cp);
+                       free(cp);
+               } else
+                       print_otag(h, TAG_A, "ch", "Lk", n->child->string);
+       }
+
+       assert(n->next->type == ROFFT_BODY);
+       if (n->next->child != NULL)
+               n = n->next;
+
+       print_man_nodelist(man, n->child, h);
+       return 0;
+}
+
+static int
+man_abort_pre(MAN_ARGS)
 {
+       abort();
 }