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Annotation of mandoc/eqn_term.c, Revision 1.13

1.13    ! schwarze    1: /*     $Id: eqn_term.c,v 1.12 2017/07/07 19:06:31 schwarze Exp $ */
1.1       kristaps    2: /*
                      3:  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.9       schwarze    4:  * Copyright (c) 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1       kristaps    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:  */
                     18: #include "config.h"
1.6       schwarze   19:
                     20: #include <sys/types.h>
1.1       kristaps   21:
                     22: #include <assert.h>
                     23: #include <stdio.h>
                     24: #include <stdlib.h>
                     25: #include <string.h>
                     26:
                     27: #include "mandoc.h"
                     28: #include "out.h"
                     29: #include "term.h"
                     30:
1.4       kristaps   31: static const enum termfont fontmap[EQNFONT__MAX] = {
                     32:        TERMFONT_NONE, /* EQNFONT_NONE */
                     33:        TERMFONT_NONE, /* EQNFONT_ROMAN */
                     34:        TERMFONT_BOLD, /* EQNFONT_BOLD */
                     35:        TERMFONT_BOLD, /* EQNFONT_FAT */
                     36:        TERMFONT_UNDER /* EQNFONT_ITALIC */
                     37: };
                     38:
1.3       kristaps   39: static void    eqn_box(struct termp *, const struct eqn_box *);
1.1       kristaps   40:
1.5       schwarze   41:
1.1       kristaps   42: void
1.13    ! schwarze   43: term_eqn(struct termp *p, const struct eqn_box *bp)
1.1       kristaps   44: {
                     45:
1.13    ! schwarze   46:        eqn_box(p, bp);
1.7       schwarze   47:        p->flags &= ~TERMP_NOSPACE;
1.1       kristaps   48: }
                     49:
                     50: static void
                     51: eqn_box(struct termp *p, const struct eqn_box *bp)
                     52: {
1.7       schwarze   53:        const struct eqn_box *child;
1.12      schwarze   54:        int delim;
                     55:
                     56:        /* Delimiters around this box? */
1.1       kristaps   57:
1.10      schwarze   58:        if ((bp->type == EQN_LIST && bp->expectargs > 1) ||
1.7       schwarze   59:            (bp->type == EQN_PILE && (bp->prev || bp->next)) ||
1.12      schwarze   60:            (bp->parent != NULL && (bp->parent->pos == EQNPOS_SQRT ||
                     61:            /* Diacritic followed by ^ or _. */
                     62:            ((bp->top != NULL || bp->bottom != NULL) &&
                     63:             bp->parent->type == EQN_SUBEXPR &&
                     64:             bp->parent->pos != EQNPOS_OVER && bp->next != NULL) ||
                     65:            /* Nested over, sub, sup, from, to. */
                     66:            (bp->type == EQN_SUBEXPR && bp->pos != EQNPOS_SQRT &&
                     67:             ((bp->parent->type == EQN_LIST && bp->expectargs == 1) ||
                     68:              (bp->parent->type == EQN_SUBEXPR &&
                     69:               bp->pos != EQNPOS_SQRT)))))) {
1.7       schwarze   70:                if (bp->parent->type == EQN_SUBEXPR && bp->prev != NULL)
                     71:                        p->flags |= TERMP_NOSPACE;
                     72:                term_word(p, bp->left != NULL ? bp->left : "(");
                     73:                p->flags |= TERMP_NOSPACE;
1.12      schwarze   74:                delim = 1;
                     75:        } else
                     76:                delim = 0;
                     77:
                     78:        /* Handle Fonts and text. */
                     79:
1.7       schwarze   80:        if (bp->font != EQNFONT_NONE)
1.4       kristaps   81:                term_fontpush(p, fontmap[(int)bp->font]);
                     82:
1.7       schwarze   83:        if (bp->text != NULL)
1.4       kristaps   84:                term_word(p, bp->text);
1.1       kristaps   85:
1.12      schwarze   86:        /* Special box types. */
                     87:
1.7       schwarze   88:        if (bp->pos == EQNPOS_SQRT) {
                     89:                term_word(p, "sqrt");
1.9       schwarze   90:                if (bp->first != NULL) {
                     91:                        p->flags |= TERMP_NOSPACE;
                     92:                        eqn_box(p, bp->first);
                     93:                }
1.7       schwarze   94:        } else if (bp->type == EQN_SUBEXPR) {
                     95:                child = bp->first;
                     96:                eqn_box(p, child);
                     97:                p->flags |= TERMP_NOSPACE;
                     98:                term_word(p, bp->pos == EQNPOS_OVER ? "/" :
                     99:                    (bp->pos == EQNPOS_SUP ||
                    100:                     bp->pos == EQNPOS_TO) ? "^" : "_");
                    101:                p->flags |= TERMP_NOSPACE;
                    102:                child = child->next;
1.8       schwarze  103:                if (child != NULL) {
1.7       schwarze  104:                        eqn_box(p, child);
1.8       schwarze  105:                        if (bp->pos == EQNPOS_FROMTO ||
                    106:                            bp->pos == EQNPOS_SUBSUP) {
                    107:                                p->flags |= TERMP_NOSPACE;
                    108:                                term_word(p, "^");
                    109:                                p->flags |= TERMP_NOSPACE;
                    110:                                child = child->next;
                    111:                                if (child != NULL)
                    112:                                        eqn_box(p, child);
                    113:                        }
1.7       schwarze  114:                }
                    115:        } else {
                    116:                child = bp->first;
1.9       schwarze  117:                if (bp->type == EQN_MATRIX &&
1.10      schwarze  118:                    child != NULL &&
                    119:                    child->type == EQN_LIST &&
                    120:                    child->expectargs > 1)
1.7       schwarze  121:                        child = child->first;
                    122:                while (child != NULL) {
                    123:                        eqn_box(p,
                    124:                            bp->type == EQN_PILE &&
                    125:                            child->type == EQN_LIST &&
1.10      schwarze  126:                            child->expectargs > 1 &&
1.7       schwarze  127:                            child->args == 1 ?
                    128:                            child->first : child);
                    129:                        child = child->next;
                    130:                }
                    131:        }
1.1       kristaps  132:
1.12      schwarze  133:        /* Handle Fonts and diacritics. */
                    134:
1.7       schwarze  135:        if (bp->font != EQNFONT_NONE)
1.4       kristaps  136:                term_fontpop(p);
1.11      schwarze  137:        if (bp->top != NULL) {
                    138:                p->flags |= TERMP_NOSPACE;
                    139:                term_word(p, bp->top);
                    140:        }
                    141:        if (bp->bottom != NULL) {
                    142:                p->flags |= TERMP_NOSPACE;
                    143:                term_word(p, "_");
                    144:        }
1.12      schwarze  145:
                    146:        /* Right delimiter after this box? */
                    147:
                    148:        if (delim) {
1.7       schwarze  149:                p->flags |= TERMP_NOSPACE;
                    150:                term_word(p, bp->right != NULL ? bp->right : ")");
                    151:                if (bp->parent->type == EQN_SUBEXPR && bp->next != NULL)
                    152:                        p->flags |= TERMP_NOSPACE;
                    153:        }
1.1       kristaps  154: }

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