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Annotation of mandoc/roff_term.c, Revision 1.7

1.7     ! schwarze    1: /*     $Id$ */
1.1       schwarze    2: /*
1.4       schwarze    3:  * Copyright (c) 2010, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1       schwarze    4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
                      8:  *
                      9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     16:  */
                     17: #include <sys/types.h>
                     18:
                     19: #include <assert.h>
1.3       schwarze   20: #include <stddef.h>
1.1       schwarze   21:
                     22: #include "roff.h"
                     23: #include "out.h"
                     24: #include "term.h"
                     25:
                     26: #define        ROFF_TERM_ARGS struct termp *p, const struct roff_node *n
                     27:
                     28: typedef        void    (*roff_term_pre_fp)(ROFF_TERM_ARGS);
                     29:
                     30: static void      roff_term_pre_br(ROFF_TERM_ARGS);
1.2       schwarze   31: static void      roff_term_pre_ft(ROFF_TERM_ARGS);
1.3       schwarze   32: static void      roff_term_pre_ll(ROFF_TERM_ARGS);
1.7     ! schwarze   33: static void      roff_term_pre_mc(ROFF_TERM_ARGS);
1.4       schwarze   34: static void      roff_term_pre_sp(ROFF_TERM_ARGS);
1.5       schwarze   35: static void      roff_term_pre_ta(ROFF_TERM_ARGS);
1.6       schwarze   36: static void      roff_term_pre_ti(ROFF_TERM_ARGS);
1.1       schwarze   37:
                     38: static const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = {
                     39:        roff_term_pre_br,  /* br */
1.2       schwarze   40:        roff_term_pre_ft,  /* ft */
1.7     ! schwarze   41:        roff_term_pre_ll,  /* ll */
        !            42:        roff_term_pre_mc,  /* mc */
1.5       schwarze   43:        roff_term_pre_sp,  /* sp */
                     44:        roff_term_pre_ta,  /* ta */
1.6       schwarze   45:        roff_term_pre_ti,  /* ti */
1.1       schwarze   46: };
                     47:
                     48:
                     49: void
                     50: roff_term_pre(struct termp *p, const struct roff_node *n)
                     51: {
                     52:        assert(n->tok < ROFF_MAX);
                     53:        (*roff_term_pre_acts[n->tok])(p, n);
                     54: }
                     55:
                     56: static void
                     57: roff_term_pre_br(ROFF_TERM_ARGS)
                     58: {
                     59:        term_newln(p);
                     60:        if (p->flags & TERMP_BRIND) {
                     61:                p->offset = p->rmargin;
                     62:                p->rmargin = p->maxrmargin;
                     63:                p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
1.2       schwarze   64:        }
                     65: }
                     66:
                     67: static void
                     68: roff_term_pre_ft(ROFF_TERM_ARGS)
                     69: {
                     70:        switch (*n->child->string) {
                     71:        case '4':
                     72:        case '3':
                     73:        case 'B':
                     74:                term_fontrepl(p, TERMFONT_BOLD);
                     75:                break;
                     76:        case '2':
                     77:        case 'I':
                     78:                term_fontrepl(p, TERMFONT_UNDER);
                     79:                break;
                     80:        case 'P':
                     81:                term_fontlast(p);
                     82:                break;
                     83:        case '1':
                     84:        case 'C':
                     85:        case 'R':
                     86:                term_fontrepl(p, TERMFONT_NONE);
                     87:                break;
                     88:        default:
                     89:                break;
1.1       schwarze   90:        }
1.3       schwarze   91: }
                     92:
                     93: static void
                     94: roff_term_pre_ll(ROFF_TERM_ARGS)
                     95: {
                     96:        term_setwidth(p, n->child != NULL ? n->child->string : NULL);
1.7     ! schwarze   97: }
        !            98:
        !            99: static void
        !           100: roff_term_pre_mc(ROFF_TERM_ARGS)
        !           101: {
        !           102:        if (p->col) {
        !           103:                p->flags |= TERMP_NOBREAK;
        !           104:                term_flushln(p);
        !           105:                p->flags &= ~(TERMP_NOBREAK | TERMP_NOSPACE);
        !           106:        }
        !           107:        if (n->child != NULL) {
        !           108:                p->mc = n->child->string;
        !           109:                p->flags |= TERMP_NEWMC;
        !           110:        } else
        !           111:                p->flags |= TERMP_ENDMC;
1.4       schwarze  112: }
                    113:
                    114: static void
                    115: roff_term_pre_sp(ROFF_TERM_ARGS)
                    116: {
                    117:        struct roffsu    su;
                    118:        int              len;
                    119:
                    120:        if (n->child != NULL) {
                    121:                if (a2roffsu(n->child->string, &su, SCALE_VS) == 0)
                    122:                        su.scale = 1.0;
                    123:                len = term_vspan(p, &su);
                    124:        } else
                    125:                len = 1;
                    126:
                    127:        if (len < 0)
                    128:                p->skipvsp -= len;
                    129:        else
                    130:                while (len--)
                    131:                        term_vspace(p);
                    132:
                    133:        roff_term_pre_br(p, n);
1.5       schwarze  134: }
                    135:
                    136: static void
                    137: roff_term_pre_ta(ROFF_TERM_ARGS)
                    138: {
                    139:        term_tab_set(p, NULL);
                    140:        for (n = n->child; n != NULL; n = n->next)
                    141:                term_tab_set(p, n->string);
1.6       schwarze  142: }
                    143:
                    144: static void
                    145: roff_term_pre_ti(ROFF_TERM_ARGS)
                    146: {
                    147:        struct roffsu    su;
                    148:        const char      *cp;
                    149:        int              len, sign;
                    150:
                    151:        roff_term_pre_br(p, n);
                    152:
                    153:        if (n->child == NULL)
                    154:                return;
                    155:        cp = n->child->string;
                    156:        if (*cp == '+') {
                    157:                sign = 1;
                    158:                cp++;
                    159:        } else if (*cp == '-') {
                    160:                sign = -1;
                    161:                cp++;
                    162:        } else
                    163:                sign = 0;
                    164:
                    165:        if (a2roffsu(cp, &su, SCALE_EM) == 0)
                    166:                return;
                    167:        len = term_hspan(p, &su) / 24;
                    168:
                    169:        if (sign == 0) {
                    170:                p->ti = len - p->offset;
                    171:                p->offset = len;
                    172:        } else if (sign == 1) {
                    173:                p->ti = len;
                    174:                p->offset += len;
                    175:        } else if ((size_t)len < p->offset) {
                    176:                p->ti = -len;
                    177:                p->offset -= len;
                    178:        } else {
                    179:                p->ti = -p->offset;
                    180:                p->offset = 0;
                    181:        }
1.1       schwarze  182: }

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