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Annotation of src/usr.bin/mandoc/eqn_term.c, Revision 1.5

1.5     ! schwarze    1: /*     $OpenBSD: eqn_term.c,v 1.4 2015/01/01 15:34:43 schwarze Exp $ */
1.1       schwarze    2: /*
                      3:  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.5     ! schwarze    4:  * Copyright (c) 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1       schwarze    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
                      7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
                      9:  *
                     10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     17:  */
1.3       schwarze   18: #include <sys/types.h>
                     19:
1.1       schwarze   20: #include <assert.h>
                     21: #include <stdio.h>
                     22: #include <stdlib.h>
                     23: #include <string.h>
                     24:
                     25: #include "mandoc.h"
                     26: #include "out.h"
                     27: #include "term.h"
                     28:
                     29: static const enum termfont fontmap[EQNFONT__MAX] = {
                     30:        TERMFONT_NONE, /* EQNFONT_NONE */
                     31:        TERMFONT_NONE, /* EQNFONT_ROMAN */
                     32:        TERMFONT_BOLD, /* EQNFONT_BOLD */
                     33:        TERMFONT_BOLD, /* EQNFONT_FAT */
                     34:        TERMFONT_UNDER /* EQNFONT_ITALIC */
                     35: };
                     36:
                     37: static void    eqn_box(struct termp *, const struct eqn_box *);
                     38:
1.2       schwarze   39:
1.1       schwarze   40: void
                     41: term_eqn(struct termp *p, const struct eqn *ep)
                     42: {
                     43:
                     44:        eqn_box(p, ep->root);
1.3       schwarze   45:        p->flags &= ~TERMP_NOSPACE;
1.1       schwarze   46: }
                     47:
                     48: static void
                     49: eqn_box(struct termp *p, const struct eqn_box *bp)
                     50: {
1.3       schwarze   51:        const struct eqn_box *child;
1.1       schwarze   52:
1.3       schwarze   53:        if (bp->type == EQN_LIST ||
                     54:            (bp->type == EQN_PILE && (bp->prev || bp->next)) ||
                     55:            (bp->parent != NULL && bp->parent->pos == EQNPOS_SQRT)) {
                     56:                if (bp->parent->type == EQN_SUBEXPR && bp->prev != NULL)
                     57:                        p->flags |= TERMP_NOSPACE;
                     58:                term_word(p, bp->left != NULL ? bp->left : "(");
                     59:                p->flags |= TERMP_NOSPACE;
                     60:        }
                     61:        if (bp->font != EQNFONT_NONE)
1.1       schwarze   62:                term_fontpush(p, fontmap[(int)bp->font]);
                     63:
1.3       schwarze   64:        if (bp->text != NULL)
1.1       schwarze   65:                term_word(p, bp->text);
                     66:
1.3       schwarze   67:        if (bp->pos == EQNPOS_SQRT) {
                     68:                term_word(p, "sqrt");
1.5     ! schwarze   69:                if (bp->first != NULL) {
        !            70:                        p->flags |= TERMP_NOSPACE;
        !            71:                        eqn_box(p, bp->first);
        !            72:                }
1.3       schwarze   73:        } else if (bp->type == EQN_SUBEXPR) {
                     74:                child = bp->first;
                     75:                eqn_box(p, child);
                     76:                p->flags |= TERMP_NOSPACE;
                     77:                term_word(p, bp->pos == EQNPOS_OVER ? "/" :
                     78:                    (bp->pos == EQNPOS_SUP ||
                     79:                     bp->pos == EQNPOS_TO) ? "^" : "_");
                     80:                p->flags |= TERMP_NOSPACE;
                     81:                child = child->next;
1.4       schwarze   82:                if (child != NULL) {
1.3       schwarze   83:                        eqn_box(p, child);
1.4       schwarze   84:                        if (bp->pos == EQNPOS_FROMTO ||
                     85:                            bp->pos == EQNPOS_SUBSUP) {
                     86:                                p->flags |= TERMP_NOSPACE;
                     87:                                term_word(p, "^");
                     88:                                p->flags |= TERMP_NOSPACE;
                     89:                                child = child->next;
                     90:                                if (child != NULL)
                     91:                                        eqn_box(p, child);
                     92:                        }
1.3       schwarze   93:                }
                     94:        } else {
                     95:                child = bp->first;
1.5     ! schwarze   96:                if (bp->type == EQN_MATRIX &&
        !            97:                    child != NULL && child->type == EQN_LIST)
1.3       schwarze   98:                        child = child->first;
                     99:                while (child != NULL) {
                    100:                        eqn_box(p,
                    101:                            bp->type == EQN_PILE &&
                    102:                            child->type == EQN_LIST &&
                    103:                            child->args == 1 ?
                    104:                            child->first : child);
                    105:                        child = child->next;
                    106:                }
                    107:        }
1.1       schwarze  108:
1.3       schwarze  109:        if (bp->font != EQNFONT_NONE)
1.1       schwarze  110:                term_fontpop(p);
1.3       schwarze  111:        if (bp->type == EQN_LIST ||
                    112:            (bp->type == EQN_PILE && (bp->prev || bp->next)) ||
                    113:            (bp->parent != NULL && bp->parent->pos == EQNPOS_SQRT)) {
                    114:                p->flags |= TERMP_NOSPACE;
                    115:                term_word(p, bp->right != NULL ? bp->right : ")");
                    116:                if (bp->parent->type == EQN_SUBEXPR && bp->next != NULL)
                    117:                        p->flags |= TERMP_NOSPACE;
                    118:        }
                    119:
                    120:        if (bp->top != NULL) {
                    121:                p->flags |= TERMP_NOSPACE;
                    122:                term_word(p, bp->top);
                    123:        }
                    124:        if (bp->bottom != NULL) {
                    125:                p->flags |= TERMP_NOSPACE;
                    126:                term_word(p, "_");
                    127:        }
1.1       schwarze  128: }