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-rw-r--r--usr.bin/mandoc/eqn_term.c172
1 files changed, 172 insertions, 0 deletions
diff --git a/usr.bin/mandoc/eqn_term.c b/usr.bin/mandoc/eqn_term.c
new file mode 100644
index 0000000..7bb1aae
--- /dev/null
+++ b/usr.bin/mandoc/eqn_term.c
@@ -0,0 +1,172 @@
+/* $OpenBSD: eqn_term.c,v 1.15 2018/12/13 05:13:15 schwarze Exp $ */
+/*
+ * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2014, 2015, 2017 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
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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 <sys/types.h>
+
+#include <assert.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "eqn.h"
+#include "out.h"
+#include "term.h"
+
+static const enum termfont fontmap[EQNFONT__MAX] = {
+ TERMFONT_NONE, /* EQNFONT_NONE */
+ TERMFONT_NONE, /* EQNFONT_ROMAN */
+ TERMFONT_BOLD, /* EQNFONT_BOLD */
+ TERMFONT_BOLD, /* EQNFONT_FAT */
+ TERMFONT_UNDER /* EQNFONT_ITALIC */
+};
+
+static void eqn_box(struct termp *, const struct eqn_box *);
+
+
+void
+term_eqn(struct termp *p, const struct eqn_box *bp)
+{
+
+ eqn_box(p, bp);
+ p->flags &= ~TERMP_NOSPACE;
+}
+
+static void
+eqn_box(struct termp *p, const struct eqn_box *bp)
+{
+ const struct eqn_box *child;
+ const char *cp;
+ int delim;
+
+ /* Delimiters around this box? */
+
+ if ((bp->type == EQN_LIST && bp->expectargs > 1) ||
+ (bp->type == EQN_PILE && (bp->prev || bp->next)) ||
+ (bp->parent != NULL && (bp->parent->pos == EQNPOS_SQRT ||
+ /* Diacritic followed by ^ or _. */
+ ((bp->top != NULL || bp->bottom != NULL) &&
+ bp->parent->type == EQN_SUBEXPR &&
+ bp->parent->pos != EQNPOS_OVER && bp->next != NULL) ||
+ /* Nested over, sub, sup, from, to. */
+ (bp->type == EQN_SUBEXPR && bp->pos != EQNPOS_SQRT &&
+ ((bp->parent->type == EQN_LIST && bp->expectargs == 1) ||
+ (bp->parent->type == EQN_SUBEXPR &&
+ bp->pos != EQNPOS_SQRT)))))) {
+ if ((bp->parent->type == EQN_SUBEXPR && bp->prev != NULL) ||
+ (bp->type == EQN_LIST &&
+ bp->first != NULL &&
+ bp->first->type != EQN_PILE &&
+ bp->first->type != EQN_MATRIX &&
+ bp->prev != NULL &&
+ (bp->prev->type == EQN_LIST ||
+ (bp->prev->type == EQN_TEXT &&
+ (*bp->prev->text == '\\' ||
+ isalpha((unsigned char)*bp->prev->text))))))
+ p->flags |= TERMP_NOSPACE;
+ term_word(p, bp->left != NULL ? bp->left : "(");
+ p->flags |= TERMP_NOSPACE;
+ delim = 1;
+ } else
+ delim = 0;
+
+ /* Handle Fonts and text. */
+
+ if (bp->font != EQNFONT_NONE)
+ term_fontpush(p, fontmap[(int)bp->font]);
+
+ if (bp->text != NULL) {
+ if (strchr("!\"'),.:;?]}", *bp->text) != NULL)
+ p->flags |= TERMP_NOSPACE;
+ term_word(p, bp->text);
+ if ((cp = strchr(bp->text, '\0')) > bp->text &&
+ (strchr("\"'([{", cp[-1]) != NULL ||
+ (bp->prev == NULL && (cp[-1] == '-' ||
+ (cp >= bp->text + 5 &&
+ strcmp(cp - 5, "\\[mi]") == 0)))))
+ p->flags |= TERMP_NOSPACE;
+ }
+
+ /* Special box types. */
+
+ if (bp->pos == EQNPOS_SQRT) {
+ term_word(p, "\\(sr");
+ if (bp->first != NULL) {
+ p->flags |= TERMP_NOSPACE;
+ eqn_box(p, bp->first);
+ }
+ } else if (bp->type == EQN_SUBEXPR) {
+ child = bp->first;
+ eqn_box(p, child);
+ p->flags |= TERMP_NOSPACE;
+ term_word(p, bp->pos == EQNPOS_OVER ? "/" :
+ (bp->pos == EQNPOS_SUP ||
+ bp->pos == EQNPOS_TO) ? "^" : "_");
+ child = child->next;
+ if (child != NULL) {
+ p->flags |= TERMP_NOSPACE;
+ eqn_box(p, child);
+ if (bp->pos == EQNPOS_FROMTO ||
+ bp->pos == EQNPOS_SUBSUP) {
+ p->flags |= TERMP_NOSPACE;
+ term_word(p, "^");
+ p->flags |= TERMP_NOSPACE;
+ child = child->next;
+ if (child != NULL)
+ eqn_box(p, child);
+ }
+ }
+ } else {
+ child = bp->first;
+ if (bp->type == EQN_MATRIX &&
+ child != NULL &&
+ child->type == EQN_LIST &&
+ child->expectargs > 1)
+ child = child->first;
+ while (child != NULL) {
+ eqn_box(p,
+ bp->type == EQN_PILE &&
+ child->type == EQN_LIST &&
+ child->expectargs > 1 &&
+ child->args == 1 ?
+ child->first : child);
+ child = child->next;
+ }
+ }
+
+ /* Handle Fonts and diacritics. */
+
+ if (bp->font != EQNFONT_NONE)
+ term_fontpop(p);
+ if (bp->top != NULL) {
+ p->flags |= TERMP_NOSPACE;
+ term_word(p, bp->top);
+ }
+ if (bp->bottom != NULL) {
+ p->flags |= TERMP_NOSPACE;
+ term_word(p, "_");
+ }
+
+ /* Right delimiter after this box? */
+
+ if (delim) {
+ p->flags |= TERMP_NOSPACE;
+ term_word(p, bp->right != NULL ? bp->right : ")");
+ if (bp->parent->type == EQN_SUBEXPR && bp->next != NULL)
+ p->flags |= TERMP_NOSPACE;
+ }
+}