diff options
Diffstat (limited to 'usr.bin/mandoc/eqn_term.c')
| -rw-r--r-- | usr.bin/mandoc/eqn_term.c | 172 |
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; + } +} |