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Annotation of mandoc/eqn_term.c, Revision 1.18

1.18    ! schwarze    1: /*     $Id: eqn_term.c,v 1.17 2017/08/23 21:56:20 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>
1.14      schwarze   23: #include <ctype.h>
1.1       kristaps   24: #include <stdio.h>
                     25: #include <stdlib.h>
                     26: #include <string.h>
                     27:
                     28: #include "mandoc.h"
                     29: #include "out.h"
                     30: #include "term.h"
                     31:
1.4       kristaps   32: static const enum termfont fontmap[EQNFONT__MAX] = {
                     33:        TERMFONT_NONE, /* EQNFONT_NONE */
                     34:        TERMFONT_NONE, /* EQNFONT_ROMAN */
                     35:        TERMFONT_BOLD, /* EQNFONT_BOLD */
                     36:        TERMFONT_BOLD, /* EQNFONT_FAT */
                     37:        TERMFONT_UNDER /* EQNFONT_ITALIC */
                     38: };
                     39:
1.3       kristaps   40: static void    eqn_box(struct termp *, const struct eqn_box *);
1.1       kristaps   41:
1.5       schwarze   42:
1.1       kristaps   43: void
1.13      schwarze   44: term_eqn(struct termp *p, const struct eqn_box *bp)
1.1       kristaps   45: {
                     46:
1.13      schwarze   47:        eqn_box(p, bp);
1.7       schwarze   48:        p->flags &= ~TERMP_NOSPACE;
1.1       kristaps   49: }
                     50:
                     51: static void
                     52: eqn_box(struct termp *p, const struct eqn_box *bp)
                     53: {
1.7       schwarze   54:        const struct eqn_box *child;
1.16      schwarze   55:        const char *cp;
1.12      schwarze   56:        int delim;
                     57:
                     58:        /* Delimiters around this box? */
1.1       kristaps   59:
1.10      schwarze   60:        if ((bp->type == EQN_LIST && bp->expectargs > 1) ||
1.7       schwarze   61:            (bp->type == EQN_PILE && (bp->prev || bp->next)) ||
1.12      schwarze   62:            (bp->parent != NULL && (bp->parent->pos == EQNPOS_SQRT ||
                     63:            /* Diacritic followed by ^ or _. */
                     64:            ((bp->top != NULL || bp->bottom != NULL) &&
                     65:             bp->parent->type == EQN_SUBEXPR &&
                     66:             bp->parent->pos != EQNPOS_OVER && bp->next != NULL) ||
                     67:            /* Nested over, sub, sup, from, to. */
                     68:            (bp->type == EQN_SUBEXPR && bp->pos != EQNPOS_SQRT &&
                     69:             ((bp->parent->type == EQN_LIST && bp->expectargs == 1) ||
                     70:              (bp->parent->type == EQN_SUBEXPR &&
                     71:               bp->pos != EQNPOS_SQRT)))))) {
1.14      schwarze   72:                if ((bp->parent->type == EQN_SUBEXPR && bp->prev != NULL) ||
                     73:                    (bp->type == EQN_LIST &&
                     74:                     bp->first != NULL &&
                     75:                     bp->first->type != EQN_PILE &&
                     76:                     bp->first->type != EQN_MATRIX &&
                     77:                     bp->prev != NULL &&
                     78:                     (bp->prev->type == EQN_LIST ||
                     79:                      (bp->prev->type == EQN_TEXT &&
                     80:                       (*bp->prev->text == '\\' ||
                     81:                        isalpha((unsigned char)*bp->prev->text))))))
1.7       schwarze   82:                        p->flags |= TERMP_NOSPACE;
                     83:                term_word(p, bp->left != NULL ? bp->left : "(");
                     84:                p->flags |= TERMP_NOSPACE;
1.12      schwarze   85:                delim = 1;
                     86:        } else
                     87:                delim = 0;
                     88:
                     89:        /* Handle Fonts and text. */
                     90:
1.7       schwarze   91:        if (bp->font != EQNFONT_NONE)
1.4       kristaps   92:                term_fontpush(p, fontmap[(int)bp->font]);
                     93:
1.15      schwarze   94:        if (bp->text != NULL) {
                     95:                if (strchr("!\"'),.:;?]}", *bp->text) != NULL)
                     96:                        p->flags |= TERMP_NOSPACE;
1.4       kristaps   97:                term_word(p, bp->text);
1.16      schwarze   98:                if ((cp = strchr(bp->text, '\0')) > bp->text &&
1.17      schwarze   99:                    (strchr("\"'([{", cp[-1]) != NULL ||
                    100:                     (bp->prev == NULL && (cp[-1] == '-' ||
                    101:                      (cp >= bp->text + 5 &&
                    102:                       strcmp(cp - 5, "\\[mi]") == 0)))))
1.15      schwarze  103:                        p->flags |= TERMP_NOSPACE;
                    104:        }
1.1       kristaps  105:
1.12      schwarze  106:        /* Special box types. */
                    107:
1.7       schwarze  108:        if (bp->pos == EQNPOS_SQRT) {
1.18    ! schwarze  109:                term_word(p, "\\(sr");
1.9       schwarze  110:                if (bp->first != NULL) {
                    111:                        p->flags |= TERMP_NOSPACE;
                    112:                        eqn_box(p, bp->first);
                    113:                }
1.7       schwarze  114:        } else if (bp->type == EQN_SUBEXPR) {
                    115:                child = bp->first;
                    116:                eqn_box(p, child);
                    117:                p->flags |= TERMP_NOSPACE;
                    118:                term_word(p, bp->pos == EQNPOS_OVER ? "/" :
                    119:                    (bp->pos == EQNPOS_SUP ||
                    120:                     bp->pos == EQNPOS_TO) ? "^" : "_");
                    121:                child = child->next;
1.8       schwarze  122:                if (child != NULL) {
1.14      schwarze  123:                        p->flags |= TERMP_NOSPACE;
1.7       schwarze  124:                        eqn_box(p, child);
1.8       schwarze  125:                        if (bp->pos == EQNPOS_FROMTO ||
                    126:                            bp->pos == EQNPOS_SUBSUP) {
                    127:                                p->flags |= TERMP_NOSPACE;
                    128:                                term_word(p, "^");
                    129:                                p->flags |= TERMP_NOSPACE;
                    130:                                child = child->next;
                    131:                                if (child != NULL)
                    132:                                        eqn_box(p, child);
                    133:                        }
1.7       schwarze  134:                }
                    135:        } else {
                    136:                child = bp->first;
1.9       schwarze  137:                if (bp->type == EQN_MATRIX &&
1.10      schwarze  138:                    child != NULL &&
                    139:                    child->type == EQN_LIST &&
                    140:                    child->expectargs > 1)
1.7       schwarze  141:                        child = child->first;
                    142:                while (child != NULL) {
                    143:                        eqn_box(p,
                    144:                            bp->type == EQN_PILE &&
                    145:                            child->type == EQN_LIST &&
1.10      schwarze  146:                            child->expectargs > 1 &&
1.7       schwarze  147:                            child->args == 1 ?
                    148:                            child->first : child);
                    149:                        child = child->next;
                    150:                }
                    151:        }
1.1       kristaps  152:
1.12      schwarze  153:        /* Handle Fonts and diacritics. */
                    154:
1.7       schwarze  155:        if (bp->font != EQNFONT_NONE)
1.4       kristaps  156:                term_fontpop(p);
1.11      schwarze  157:        if (bp->top != NULL) {
                    158:                p->flags |= TERMP_NOSPACE;
                    159:                term_word(p, bp->top);
                    160:        }
                    161:        if (bp->bottom != NULL) {
                    162:                p->flags |= TERMP_NOSPACE;
                    163:                term_word(p, "_");
                    164:        }
1.12      schwarze  165:
                    166:        /* Right delimiter after this box? */
                    167:
                    168:        if (delim) {
1.7       schwarze  169:                p->flags |= TERMP_NOSPACE;
                    170:                term_word(p, bp->right != NULL ? bp->right : ")");
                    171:                if (bp->parent->type == EQN_SUBEXPR && bp->next != NULL)
                    172:                        p->flags |= TERMP_NOSPACE;
                    173:        }
1.1       kristaps  174: }

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