John Gardner: handling of ASCII control characters during input

[mandoc.git] / man_term.c

diff --git a/man_term.c b/man_term.c
index b051b2ec18b5d94c638c45250fd47a9ee72ff9ca..b71d6bee84514b69558d74bf4733158f4163f87b 100644 (file)
--- a/man_term.c
+++ b/man_term.c
@@ -1,7 +1,7 @@
-/*     $Id: man_term.c,v 1.231 2019/07/22 03:21:49 schwarze Exp $ */
+/* $Id: man_term.c,v 1.235 2020/03/13 15:32:28 schwarze Exp $ */
 /*
+ * Copyright (c) 2010-2015, 2017-2020 Ingo Schwarze <schwarze@openbsd.org>
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2010-2015, 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
@@ -14,6 +14,9 @@
  * 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.
+ *
+ * Plain text formatter for man(7), used by mandoc(1)
+ * for ASCII, UTF-8, PostScript, and PDF output.
  */
 #include "config.h"
 
@@ -32,7 +35,7 @@
 #include "man.h"
 #include "out.h"
 #include "term.h"
-#include "tag.h"
+#include "term_tag.h"
 #include "main.h"
 
 #define        MAXMARGINS        64 /* maximum number of indented scopes */
@@ -64,7 +67,7 @@ static        void              print_man_head(struct termp *,
 static void              print_man_foot(struct termp *,
                                const struct roff_meta *);
 static void              print_bvspace(struct termp *,
-                               const struct roff_node *, int);
+                               struct roff_node *, int);
 
 static int               pre_B(DECL_ARGS);
 static int               pre_DT(DECL_ARGS);
@@ -94,8 +97,6 @@ static        void              post_SY(DECL_ARGS);
 static void              post_TP(DECL_ARGS);
 static void              post_UR(DECL_ARGS);
 
-static void              tag_man(struct termp *, struct roff_node *);
-
 static const struct man_term_act man_term_acts[MAN_MAX - MAN_TH] = {
        { NULL, NULL, 0 }, /* TH */
        { pre_SH, post_SH, 0 }, /* SH */
@@ -205,19 +206,20 @@ terminal_man(void *arg, const struct roff_meta *man)
  * first, print it.
  */
 static void
-print_bvspace(struct termp *p, const struct roff_node *n, int pardist)
+print_bvspace(struct termp *p, struct roff_node *n, int pardist)
 {
-       int      i;
+       struct roff_node        *nch;
+       int                      i;
 
        term_newln(p);
 
-       if (n->body != NULL && n->body->child != NULL)
-               if (n->body->child->type == ROFFT_TBL)
-                       return;
+       if (n->body != NULL &&
+           (nch = roff_node_child(n->body)) != NULL &&
+           nch->type == ROFFT_TBL)
+               return;
 
-       if (n->parent->type == ROFFT_ROOT || n->parent->tok != MAN_RS)
-               if (n->prev == NULL)
-                       return;
+       if (n->parent->tok != MAN_RS && roff_node_prev(n) == NULL)
+               return;
 
        for (i = 0; i < pardist; i++)
                term_vspace(p);
@@ -538,10 +540,8 @@ pre_IP(DECL_ARGS)
        case ROFFT_HEAD:
                p->tcol->offset = mt->offset;
                p->tcol->rmargin = mt->offset + len;
-               if (n->child != NULL) {
+               if (n->child != NULL)
                        print_man_node(p, mt, n->child, meta);
-                       tag_man(p, n->child);
-               }
                return 0;
        case ROFFT_BODY:
                p->tcol->offset = mt->offset + len;
@@ -671,12 +671,8 @@ pre_SS(DECL_ARGS)
                 * and after an empty subsection.
                 */
 
-               do {
-                       n = n->prev;
-               } while (n != NULL && n->tok >= MAN_TH &&
-                   man_term_act(n->tok)->flags & MAN_NOTEXT);
-               if (n == NULL || n->type == ROFFT_COMMENT ||
-                   (n->tok == MAN_SS && n->body->child == NULL))
+               if ((n = roff_node_prev(n)) == NULL ||
+                   (n->tok == MAN_SS && roff_node_child(n->body) == NULL))
                        break;
 
                for (i = 0; i < mt->pardist; i++)
@@ -716,12 +712,8 @@ pre_SH(DECL_ARGS)
                 * and after an empty section.
                 */
 
-               do {
-                       n = n->prev;
-               } while (n != NULL && n->tok >= MAN_TH &&
-                   man_term_act(n->tok)->flags & MAN_NOTEXT);
-               if (n == NULL || n->type == ROFFT_COMMENT ||
-                   (n->tok == MAN_SH && n->body->child == NULL))
+               if ((n = roff_node_prev(n)) == NULL ||
+                   (n->tok == MAN_SH && roff_node_child(n->body) == NULL))
                        break;
 
                for (i = 0; i < mt->pardist; i++)
@@ -827,7 +819,7 @@ pre_SY(DECL_ARGS)
 
        switch (n->type) {
        case ROFFT_BLOCK:
-               if (n->prev == NULL || n->prev->tok != MAN_SY)
+               if ((nn = roff_node_prev(n)) == NULL || nn->tok != MAN_SY)
                        print_bvspace(p, n, mt->pardist);
                return 1;
        case ROFFT_HEAD:
@@ -908,6 +900,9 @@ print_man_node(DECL_ARGS)
        const struct man_term_act *act;
        int c;
 
+       if (n->flags & NODE_ID)
+               term_tag_write(n, p->line);
+
        switch (n->type) {
        case ROFFT_TEXT:
                /*
@@ -1154,60 +1149,3 @@ print_man_head(struct termp *p, const struct roff_meta *meta)
        }
        free(title);
 }
-
-/*
- * Skip leading whitespace, dashes, backslashes, and font escapes,
- * then create a tag if the first following byte is a letter.
- * Priority is high unless whitespace is present.
- */
-static void
-tag_man(struct termp *p, struct roff_node *n)
-{
-       const char      *cp, *arg;
-       int              prio, sz;
-
-       assert(n->type == ROFFT_TEXT);
-       cp = n->string;
-       prio = 1;
-       for (;;) {
-               switch (*cp) {
-               case ' ':
-               case '\t':
-                       prio = INT_MAX;
-                       /* FALLTHROUGH */
-               case '-':
-                       cp++;
-                       break;
-               case '\\':
-                       cp++;
-                       switch (mandoc_escape(&cp, &arg, &sz)) {
-                       case ESCAPE_FONT:
-                       case ESCAPE_FONTROMAN:
-                       case ESCAPE_FONTITALIC:
-                       case ESCAPE_FONTBOLD:
-                       case ESCAPE_FONTPREV:
-                       case ESCAPE_FONTBI:
-                               break;
-                       case ESCAPE_SPECIAL:
-                               if (sz != 1)
-                                       return;
-                               switch (*arg) {
-                               case '&':
-                               case '-':
-                               case 'e':
-                                       break;
-                               default:
-                                       return;
-                               }
-                               break;
-                       default:
-                               return;
-                       }
-                       break;
-               default:
-                       if (isalpha((unsigned char)*cp))
-                               tag_put(cp, prio, p->line);
-                       return;
-               }
-       }
-}