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Annotation of mandoc/roff_term.c, Revision 1.6

1.1       schwarze    1: /*     $OpenBSD$ */
                      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);
1.4       schwarze   33: static void      roff_term_pre_sp(ROFF_TERM_ARGS);
1.5       schwarze   34: static void      roff_term_pre_ta(ROFF_TERM_ARGS);
1.6     ! schwarze   35: static void      roff_term_pre_ti(ROFF_TERM_ARGS);
1.1       schwarze   36:
                     37: static const roff_term_pre_fp roff_term_pre_acts[ROFF_MAX] = {
                     38:        roff_term_pre_br,  /* br */
1.2       schwarze   39:        roff_term_pre_ft,  /* ft */
1.3       schwarze   40:        roff_term_pre_ll,  /* ft */
1.5       schwarze   41:        roff_term_pre_sp,  /* sp */
                     42:        roff_term_pre_ta,  /* ta */
1.6     ! schwarze   43:        roff_term_pre_ti,  /* ti */
1.1       schwarze   44: };
                     45:
                     46:
                     47: void
                     48: roff_term_pre(struct termp *p, const struct roff_node *n)
                     49: {
                     50:        assert(n->tok < ROFF_MAX);
                     51:        (*roff_term_pre_acts[n->tok])(p, n);
                     52: }
                     53:
                     54: static void
                     55: roff_term_pre_br(ROFF_TERM_ARGS)
                     56: {
                     57:        term_newln(p);
                     58:        if (p->flags & TERMP_BRIND) {
                     59:                p->offset = p->rmargin;
                     60:                p->rmargin = p->maxrmargin;
                     61:                p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
1.2       schwarze   62:        }
                     63: }
                     64:
                     65: static void
                     66: roff_term_pre_ft(ROFF_TERM_ARGS)
                     67: {
                     68:        switch (*n->child->string) {
                     69:        case '4':
                     70:        case '3':
                     71:        case 'B':
                     72:                term_fontrepl(p, TERMFONT_BOLD);
                     73:                break;
                     74:        case '2':
                     75:        case 'I':
                     76:                term_fontrepl(p, TERMFONT_UNDER);
                     77:                break;
                     78:        case 'P':
                     79:                term_fontlast(p);
                     80:                break;
                     81:        case '1':
                     82:        case 'C':
                     83:        case 'R':
                     84:                term_fontrepl(p, TERMFONT_NONE);
                     85:                break;
                     86:        default:
                     87:                break;
1.1       schwarze   88:        }
1.3       schwarze   89: }
                     90:
                     91: static void
                     92: roff_term_pre_ll(ROFF_TERM_ARGS)
                     93: {
                     94:        term_setwidth(p, n->child != NULL ? n->child->string : NULL);
1.4       schwarze   95: }
                     96:
                     97: static void
                     98: roff_term_pre_sp(ROFF_TERM_ARGS)
                     99: {
                    100:        struct roffsu    su;
                    101:        int              len;
                    102:
                    103:        if (n->child != NULL) {
                    104:                if (a2roffsu(n->child->string, &su, SCALE_VS) == 0)
                    105:                        su.scale = 1.0;
                    106:                len = term_vspan(p, &su);
                    107:        } else
                    108:                len = 1;
                    109:
                    110:        if (len < 0)
                    111:                p->skipvsp -= len;
                    112:        else
                    113:                while (len--)
                    114:                        term_vspace(p);
                    115:
                    116:        roff_term_pre_br(p, n);
1.5       schwarze  117: }
                    118:
                    119: static void
                    120: roff_term_pre_ta(ROFF_TERM_ARGS)
                    121: {
                    122:        term_tab_set(p, NULL);
                    123:        for (n = n->child; n != NULL; n = n->next)
                    124:                term_tab_set(p, n->string);
1.6     ! schwarze  125: }
        !           126:
        !           127: static void
        !           128: roff_term_pre_ti(ROFF_TERM_ARGS)
        !           129: {
        !           130:        struct roffsu    su;
        !           131:        const char      *cp;
        !           132:        int              len, sign;
        !           133:
        !           134:        roff_term_pre_br(p, n);
        !           135:
        !           136:        if (n->child == NULL)
        !           137:                return;
        !           138:        cp = n->child->string;
        !           139:        if (*cp == '+') {
        !           140:                sign = 1;
        !           141:                cp++;
        !           142:        } else if (*cp == '-') {
        !           143:                sign = -1;
        !           144:                cp++;
        !           145:        } else
        !           146:                sign = 0;
        !           147:
        !           148:        if (a2roffsu(cp, &su, SCALE_EM) == 0)
        !           149:                return;
        !           150:        len = term_hspan(p, &su) / 24;
        !           151:
        !           152:        if (sign == 0) {
        !           153:                p->ti = len - p->offset;
        !           154:                p->offset = len;
        !           155:        } else if (sign == 1) {
        !           156:                p->ti = len;
        !           157:                p->offset += len;
        !           158:        } else if ((size_t)len < p->offset) {
        !           159:                p->ti = -len;
        !           160:                p->offset -= len;
        !           161:        } else {
        !           162:                p->ti = -p->offset;
        !           163:                p->offset = 0;
        !           164:        }
1.1       schwarze  165: }

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