version 1.30, 2020/03/21 00:17:31 |
version 1.37, 2022/04/26 11:38:38 |
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/* $Id$ */ |
/* $Id$ */ |
/* |
/* |
* Copyright (c) 2015,2016,2018,2019,2020 Ingo Schwarze <schwarze@openbsd.org> |
* Copyright (c) 2015, 2016, 2018, 2019, 2020, 2022 |
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* Ingo Schwarze <schwarze@openbsd.org> |
* |
* |
* Permission to use, copy, modify, and distribute this software for any |
* Permission to use, copy, modify, and distribute this software for any |
* purpose with or without fee is hereby granted, provided that the above |
* purpose with or without fee is hereby granted, provided that the above |
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#include <assert.h> |
#include <assert.h> |
#include <limits.h> |
#include <limits.h> |
#include <stddef.h> |
#include <stddef.h> |
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#include <stdint.h> |
#include <stdlib.h> |
#include <stdlib.h> |
#include <string.h> |
#include <string.h> |
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#include "mandoc_aux.h" |
#include "mandoc_aux.h" |
#include "mandoc_ohash.h" |
#include "mandoc_ohash.h" |
#include "roff.h" |
#include "roff.h" |
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#include "mdoc.h" |
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#include "roff_int.h" |
#include "tag.h" |
#include "tag.h" |
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struct tag_entry { |
struct tag_entry { |
Line 40 struct tag_entry { |
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Line 44 struct tag_entry { |
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char s[]; |
char s[]; |
}; |
}; |
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static void tag_move_href(struct roff_man *, |
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struct roff_node *, const char *); |
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static void tag_move_id(struct roff_node *); |
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static struct ohash tag_data; |
static struct ohash tag_data; |
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/* |
/* |
* Set a node where a term is defined, |
* Set a node where a term is defined, |
* unless it is already defined at a lower priority. |
* unless the term is already defined at a lower priority. |
*/ |
*/ |
void |
void |
tag_put(const char *s, int prio, struct roff_node *n) |
tag_put(const char *s, int prio, struct roff_node *n) |
{ |
{ |
struct tag_entry *entry; |
struct tag_entry *entry; |
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struct roff_node *nold; |
const char *se; |
const char *se; |
size_t len; |
size_t len; |
unsigned int slot; |
unsigned int slot; |
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assert(prio <= TAG_FALLBACK); |
assert(prio <= TAG_FALLBACK); |
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/* |
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* If the node is already tagged, the existing tag is |
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* explicit and we are now about to add an implicit tag. |
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* Don't do that; just skip implicit tagging if the author |
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* specified an explicit tag. |
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*/ |
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if (n->flags & NODE_ID) |
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return; |
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/* Determine the implicit tag. */ |
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if (s == NULL) { |
if (s == NULL) { |
if (n->child == NULL || n->child->type != ROFFT_TEXT) |
if (n->child == NULL || n->child->type != ROFFT_TEXT) |
return; |
return; |
Line 142 tag_put(const char *s, int prio, struct roff_node *n) |
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Line 163 tag_put(const char *s, int prio, struct roff_node *n) |
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*/ |
*/ |
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else if (entry->prio < prio) |
else if (entry->prio < prio) |
return; |
return; |
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/* |
/* |
* If the existing entry is worse, clear it. |
* If the existing entry is worse, clear it. |
Line 151 tag_put(const char *s, int prio, struct roff_node *n) |
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Line 172 tag_put(const char *s, int prio, struct roff_node *n) |
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*/ |
*/ |
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else if (entry->prio > prio || prio == TAG_FALLBACK) { |
else if (entry->prio > prio || prio == TAG_FALLBACK) { |
while (entry->nnodes > 0) |
while (entry->nnodes > 0) { |
entry->nodes[--entry->nnodes]->flags &= ~NODE_ID; |
nold = entry->nodes[--entry->nnodes]; |
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nold->flags &= ~NODE_ID; |
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free(nold->tag); |
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nold->tag = NULL; |
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} |
if (prio == TAG_FALLBACK) { |
if (prio == TAG_FALLBACK) { |
entry->prio = TAG_DELETE; |
entry->prio = TAG_DELETE; |
return; |
return; |
Line 171 tag_put(const char *s, int prio, struct roff_node *n) |
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Line 195 tag_put(const char *s, int prio, struct roff_node *n) |
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entry->prio = prio; |
entry->prio = prio; |
n->flags |= NODE_ID; |
n->flags |= NODE_ID; |
if (n->child == NULL || n->child->string != s || *se != '\0') { |
if (n->child == NULL || n->child->string != s || *se != '\0') { |
assert(n->string == NULL); |
assert(n->tag == NULL); |
n->string = mandoc_strndup(s, len); |
n->tag = mandoc_strndup(s, len); |
} |
} |
} |
} |
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enum tag_result |
int |
tag_check(const char *test_tag) |
tag_exists(const char *tag) |
{ |
{ |
unsigned int slot; |
return ohash_find(&tag_data, ohash_qlookup(&tag_data, tag)) != NULL; |
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} |
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if (ohash_first(&tag_data, &slot) == NULL) |
/* |
return TAG_EMPTY; |
* For in-line elements, move the link target |
else if (test_tag != NULL && ohash_find(&tag_data, |
* to the enclosing paragraph when appropriate. |
ohash_qlookup(&tag_data, test_tag)) == NULL) |
*/ |
return TAG_MISS; |
static void |
else |
tag_move_id(struct roff_node *n) |
return TAG_OK; |
{ |
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struct roff_node *np; |
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np = n; |
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for (;;) { |
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if (np->prev != NULL) |
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np = np->prev; |
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else if ((np = np->parent) == NULL) |
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return; |
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switch (np->tok) { |
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case MDOC_It: |
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switch (np->parent->parent->norm->Bl.type) { |
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case LIST_column: |
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/* Target the ROFFT_BLOCK = <tr>. */ |
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np = np->parent; |
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break; |
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case LIST_diag: |
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case LIST_hang: |
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case LIST_inset: |
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case LIST_ohang: |
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case LIST_tag: |
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/* Target the ROFFT_HEAD = <dt>. */ |
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np = np->parent->head; |
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break; |
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default: |
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/* Target the ROFF_BODY = <li>. */ |
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break; |
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} |
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/* FALLTHROUGH */ |
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case MDOC_Pp: /* Target the ROFFT_ELEM = <p>. */ |
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if (np->tag == NULL) { |
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np->tag = mandoc_strdup(n->tag == NULL ? |
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n->child->string : n->tag); |
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np->flags |= NODE_ID; |
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n->flags &= ~NODE_ID; |
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} |
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return; |
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case MDOC_Sh: |
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case MDOC_Ss: |
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case MDOC_Bd: |
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case MDOC_Bl: |
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case MDOC_D1: |
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case MDOC_Dl: |
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case MDOC_Rs: |
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/* Do not move past major blocks. */ |
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return; |
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default: |
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/* |
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* Move past in-line content and partial |
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* blocks, for example .It Xo or .It Bq Er. |
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*/ |
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break; |
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} |
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} |
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} |
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/* |
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* When a paragraph is tagged and starts with text, |
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* move the permalink to the first few words. |
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*/ |
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static void |
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tag_move_href(struct roff_man *man, struct roff_node *n, const char *tag) |
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{ |
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char *cp; |
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if (n == NULL || n->type != ROFFT_TEXT || |
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*n->string == '\0' || *n->string == ' ') |
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return; |
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cp = n->string; |
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while (cp != NULL && cp - n->string < 5) |
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cp = strchr(cp + 1, ' '); |
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/* If the first text node is longer, split it. */ |
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if (cp != NULL && cp[1] != '\0') { |
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man->last = n; |
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man->next = ROFF_NEXT_SIBLING; |
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roff_word_alloc(man, n->line, |
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n->pos + (cp - n->string), cp + 1); |
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man->last->flags = n->flags & ~NODE_LINE; |
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*cp = '\0'; |
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} |
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assert(n->tag == NULL); |
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n->tag = mandoc_strdup(tag); |
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n->flags |= NODE_HREF; |
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} |
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/* |
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* When all tags have been set, decide where to put |
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* the associated permalinks, and maybe move some tags |
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* to the beginning of the respective paragraphs. |
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*/ |
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void |
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tag_postprocess(struct roff_man *man, struct roff_node *n) |
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{ |
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if (n->flags & NODE_ID) { |
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switch (n->tok) { |
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case MDOC_Pp: |
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tag_move_href(man, n->next, n->tag); |
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break; |
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case MDOC_Bd: |
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case MDOC_D1: |
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case MDOC_Dl: |
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tag_move_href(man, n->child, n->tag); |
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break; |
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case MDOC_Bl: |
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/* XXX No permalink for now. */ |
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break; |
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default: |
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if (n->type == ROFFT_ELEM || n->tok == MDOC_Fo) |
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tag_move_id(n); |
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if (n->tok != MDOC_Tg) |
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n->flags |= NODE_HREF; |
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else if ((n->flags & NODE_ID) == 0) { |
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n->flags |= NODE_NOPRT; |
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free(n->tag); |
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n->tag = NULL; |
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} |
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break; |
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} |
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} |
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for (n = n->child; n != NULL; n = n->next) |
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tag_postprocess(man, n); |
} |
} |