-/* $Id: tag.c,v 1.13 2016/07/20 13:03:24 schwarze Exp $ */
+/* $Id: tag.c,v 1.36 2020/04/19 16:36:16 schwarze Exp $ */
/*
- * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2015,2016,2018,2019,2020 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
* 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.
+ *
+ * Functions to tag syntax tree nodes.
+ * For internal use by mandoc(1) validation modules only.
*/
#include "config.h"
#include <sys/types.h>
-#include <signal.h>
+#include <assert.h>
+#include <limits.h>
#include <stddef.h>
#include <stdint.h>
-#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
#include "mandoc_aux.h"
#include "mandoc_ohash.h"
+#include "roff.h"
+#include "mdoc.h"
+#include "roff_int.h"
#include "tag.h"
struct tag_entry {
- size_t line;
+ struct roff_node **nodes;
+ size_t maxnodes;
+ size_t nnodes;
int prio;
char s[];
};
-static void tag_signal(int) __attribute__((noreturn));
+static void tag_move_href(struct roff_man *,
+ struct roff_node *, const char *);
+static void tag_move_id(struct roff_node *);
static struct ohash tag_data;
-static struct tag_files tag_files;
/*
- * Prepare for using a pager.
- * Not all pagers are capable of using a tag file,
- * but for simplicity, create it anyway.
+ * Set up the ohash table to collect nodes
+ * where various marked-up terms are documented.
*/
-struct tag_files *
-tag_init(void)
+void
+tag_alloc(void)
{
- struct sigaction sa;
- int ofd;
+ mandoc_ohash_init(&tag_data, 4, offsetof(struct tag_entry, s));
+}
- ofd = -1;
- tag_files.tfd = -1;
- tag_files.tcpgid = -1;
+void
+tag_free(void)
+{
+ struct tag_entry *entry;
+ unsigned int slot;
- /* Clean up when dying from a signal. */
+ if (tag_data.info.free == NULL)
+ return;
+ entry = ohash_first(&tag_data, &slot);
+ while (entry != NULL) {
+ free(entry->nodes);
+ free(entry);
+ entry = ohash_next(&tag_data, &slot);
+ }
+ ohash_delete(&tag_data);
+ tag_data.info.free = NULL;
+}
- memset(&sa, 0, sizeof(sa));
- sigfillset(&sa.sa_mask);
- sa.sa_handler = tag_signal;
- sigaction(SIGHUP, &sa, NULL);
- sigaction(SIGINT, &sa, NULL);
- sigaction(SIGTERM, &sa, NULL);
+/*
+ * Set a node where a term is defined,
+ * unless it is already defined at a lower priority.
+ */
+void
+tag_put(const char *s, int prio, struct roff_node *n)
+{
+ struct tag_entry *entry;
+ struct roff_node *nold;
+ const char *se;
+ size_t len;
+ unsigned int slot;
+
+ assert(prio <= TAG_FALLBACK);
+
+ if (s == NULL) {
+ if (n->child == NULL || n->child->type != ROFFT_TEXT)
+ return;
+ s = n->child->string;
+ switch (s[0]) {
+ case '-':
+ s++;
+ break;
+ case '\\':
+ switch (s[1]) {
+ case '&':
+ case '-':
+ case 'e':
+ s += 2;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ }
/*
- * POSIX requires that a process calling tcsetpgrp(3)
- * from the background gets a SIGTTOU signal.
- * In that case, do not stop.
+ * Skip whitespace and escapes and whatever follows,
+ * and if there is any, downgrade the priority.
*/
- sa.sa_handler = SIG_IGN;
- sigaction(SIGTTOU, &sa, NULL);
+ len = strcspn(s, " \t\\");
+ if (len == 0)
+ return;
- /* Save the original standard output for use by the pager. */
+ se = s + len;
+ if (*se != '\0' && prio < TAG_WEAK)
+ prio = TAG_WEAK;
- if ((tag_files.ofd = dup(STDOUT_FILENO)) == -1)
- goto fail;
+ slot = ohash_qlookupi(&tag_data, s, &se);
+ entry = ohash_find(&tag_data, slot);
- /* Create both temporary output files. */
+ /* Build a new entry. */
- (void)strlcpy(tag_files.ofn, "/tmp/man.XXXXXXXXXX",
- sizeof(tag_files.ofn));
- (void)strlcpy(tag_files.tfn, "/tmp/man.XXXXXXXXXX",
- sizeof(tag_files.tfn));
- if ((ofd = mkstemp(tag_files.ofn)) == -1)
- goto fail;
- if ((tag_files.tfd = mkstemp(tag_files.tfn)) == -1)
- goto fail;
- if (dup2(ofd, STDOUT_FILENO) == -1)
- goto fail;
- close(ofd);
+ if (entry == NULL) {
+ entry = mandoc_malloc(sizeof(*entry) + len + 1);
+ memcpy(entry->s, s, len);
+ entry->s[len] = '\0';
+ entry->nodes = NULL;
+ entry->maxnodes = entry->nnodes = 0;
+ ohash_insert(&tag_data, slot, entry);
+ }
/*
- * Set up the ohash table to collect output line numbers
- * where various marked-up terms are documented.
+ * Lower priority numbers take precedence.
+ * If a better entry is already present, ignore the new one.
*/
- mandoc_ohash_init(&tag_data, 4, offsetof(struct tag_entry, s));
- return &tag_files;
-
-fail:
- tag_unlink();
- if (ofd != -1)
- close(ofd);
- if (tag_files.ofd != -1)
- close(tag_files.ofd);
- if (tag_files.tfd != -1)
- close(tag_files.tfd);
- *tag_files.ofn = '\0';
- *tag_files.tfn = '\0';
- tag_files.ofd = -1;
- tag_files.tfd = -1;
- return NULL;
+ else if (entry->prio < prio)
+ return;
+
+ /*
+ * If the existing entry is worse, clear it.
+ * In addition, a tag with priority TAG_FALLBACK
+ * is only used if the tag occurs exactly once.
+ */
+
+ else if (entry->prio > prio || prio == TAG_FALLBACK) {
+ while (entry->nnodes > 0) {
+ nold = entry->nodes[--entry->nnodes];
+ nold->flags &= ~NODE_ID;
+ free(nold->tag);
+ nold->tag = NULL;
+ }
+ if (prio == TAG_FALLBACK) {
+ entry->prio = TAG_DELETE;
+ return;
+ }
+ }
+
+ /* Remember the new node. */
+
+ if (entry->maxnodes == entry->nnodes) {
+ entry->maxnodes += 4;
+ entry->nodes = mandoc_reallocarray(entry->nodes,
+ entry->maxnodes, sizeof(*entry->nodes));
+ }
+ entry->nodes[entry->nnodes++] = n;
+ entry->prio = prio;
+ n->flags |= NODE_ID;
+ if (n->child == NULL || n->child->string != s || *se != '\0') {
+ assert(n->tag == NULL);
+ n->tag = mandoc_strndup(s, len);
+ }
+}
+
+int
+tag_exists(const char *tag)
+{
+ return ohash_find(&tag_data, ohash_qlookup(&tag_data, tag)) != NULL;
}
/*
- * Set the line number where a term is defined,
- * unless it is already defined at a higher priority.
+ * For in-line elements, move the link target
+ * to the enclosing paragraph when appropriate.
*/
-void
-tag_put(const char *s, int prio, size_t line)
+static void
+tag_move_id(struct roff_node *n)
{
- struct tag_entry *entry;
- size_t len;
- unsigned int slot;
+ struct roff_node *np;
- if (tag_files.tfd <= 0 || strchr(s, ' ') != NULL)
- return;
- slot = ohash_qlookup(&tag_data, s);
- entry = ohash_find(&tag_data, slot);
- if (entry == NULL) {
- len = strlen(s) + 1;
- entry = mandoc_malloc(sizeof(*entry) + len);
- memcpy(entry->s, s, len);
- ohash_insert(&tag_data, slot, entry);
- } else if (entry->prio <= prio)
- return;
- entry->line = line;
- entry->prio = prio;
+ np = n;
+ for (;;) {
+ if (np->prev != NULL)
+ np = np->prev;
+ else if ((np = np->parent) == NULL)
+ return;
+ switch (np->tok) {
+ case MDOC_It:
+ switch (np->parent->parent->norm->Bl.type) {
+ case LIST_column:
+ /* Target the ROFFT_BLOCK = <tr>. */
+ np = np->parent;
+ break;
+ case LIST_diag:
+ case LIST_hang:
+ case LIST_inset:
+ case LIST_ohang:
+ case LIST_tag:
+ /* Target the ROFFT_HEAD = <dt>. */
+ np = np->parent->head;
+ break;
+ default:
+ /* Target the ROFF_BODY = <li>. */
+ break;
+ }
+ /* FALLTHROUGH */
+ case MDOC_Pp: /* Target the ROFFT_ELEM = <p>. */
+ if (np->tag == NULL) {
+ np->tag = mandoc_strdup(n->tag == NULL ?
+ n->child->string : n->tag);
+ np->flags |= NODE_ID;
+ n->flags &= ~NODE_ID;
+ }
+ return;
+ case MDOC_Sh:
+ case MDOC_Ss:
+ case MDOC_Bd:
+ case MDOC_Bl:
+ case MDOC_D1:
+ case MDOC_Dl:
+ case MDOC_Rs:
+ /* Do not move past major blocks. */
+ return;
+ default:
+ /*
+ * Move past in-line content and partial
+ * blocks, for example .It Xo or .It Bq Er.
+ */
+ break;
+ }
+ }
}
/*
- * Write out the tags file using the previously collected
- * information and clear the ohash table while going along.
+ * When a paragraph is tagged and starts with text,
+ * move the permalink to the first few words.
*/
-void
-tag_write(void)
+static void
+tag_move_href(struct roff_man *man, struct roff_node *n, const char *tag)
{
- FILE *stream;
- struct tag_entry *entry;
- unsigned int slot;
+ char *cp;
- if (tag_files.tfd <= 0)
+ if (n == NULL || n->type != ROFFT_TEXT ||
+ *n->string == '\0' || *n->string == ' ')
return;
- stream = fdopen(tag_files.tfd, "w");
- entry = ohash_first(&tag_data, &slot);
- while (entry != NULL) {
- if (stream != NULL)
- fprintf(stream, "%s %s %zu\n",
- entry->s, tag_files.ofn, entry->line);
- free(entry);
- entry = ohash_next(&tag_data, &slot);
+
+ cp = n->string;
+ while (cp != NULL && cp - n->string < 5)
+ cp = strchr(cp + 1, ' ');
+
+ /* If the first text node is longer, split it. */
+
+ if (cp != NULL && cp[1] != '\0') {
+ man->last = n;
+ man->next = ROFF_NEXT_SIBLING;
+ roff_word_alloc(man, n->line,
+ n->pos + (cp - n->string), cp + 1);
+ man->last->flags = n->flags & ~NODE_LINE;
+ *cp = '\0';
}
- ohash_delete(&tag_data);
- if (stream != NULL)
- fclose(stream);
+
+ assert(n->tag == NULL);
+ n->tag = mandoc_strdup(tag);
+ n->flags |= NODE_HREF;
}
+/*
+ * When all tags have been set, decide where to put
+ * the associated permalinks, and maybe move some tags
+ * to the beginning of the respective paragraphs.
+ */
void
-tag_unlink(void)
+tag_postprocess(struct roff_man *man, struct roff_node *n)
{
- pid_t tc_pgid;
-
- if (tag_files.tcpgid != -1) {
- tc_pgid = tcgetpgrp(STDIN_FILENO);
- if (tc_pgid == tag_files.pager_pid ||
- tc_pgid == getpgid(0) ||
- getpgid(tc_pgid) == -1)
- (void)tcsetpgrp(STDIN_FILENO, tag_files.tcpgid);
+ if (n->flags & NODE_ID) {
+ switch (n->tok) {
+ case MDOC_Pp:
+ tag_move_href(man, n->next, n->tag);
+ break;
+ case MDOC_Bd:
+ case MDOC_D1:
+ case MDOC_Dl:
+ tag_move_href(man, n->child, n->tag);
+ break;
+ case MDOC_Bl:
+ /* XXX No permalink for now. */
+ break;
+ default:
+ if (n->type == ROFFT_ELEM || n->tok == MDOC_Fo)
+ tag_move_id(n);
+ if (n->tok != MDOC_Tg)
+ n->flags |= NODE_HREF;
+ else if ((n->flags & NODE_ID) == 0) {
+ n->flags |= NODE_NOPRT;
+ free(n->tag);
+ n->tag = NULL;
+ }
+ break;
+ }
}
- if (*tag_files.ofn != '\0')
- unlink(tag_files.ofn);
- if (*tag_files.tfn != '\0')
- unlink(tag_files.tfn);
-}
-
-static void
-tag_signal(int signum)
-{
- struct sigaction sa;
-
- tag_unlink();
- memset(&sa, 0, sizeof(sa));
- sigemptyset(&sa.sa_mask);
- sa.sa_handler = SIG_DFL;
- sigaction(signum, &sa, NULL);
- kill(getpid(), signum);
- /* NOTREACHED */
- _exit(1);
+ for (n = n->child; n != NULL; n = n->next)
+ tag_postprocess(man, n);
}
git.ckatri.com / mandoc.git / blobdiff