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Annotation of mandoc/term.c, Revision 1.138

1.138   ! schwarze    1: /*     $Id: term.c,v 1.137 2010/05/17 22:11:42 kristaps Exp $ */
1.1       kristaps    2: /*
1.75      kristaps    3:  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
1.1       kristaps    4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
1.74      kristaps    6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    8:  *
1.74      kristaps    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.
1.1       kristaps   16:  */
1.128     kristaps   17: #ifdef HAVE_CONFIG_H
                     18: #include "config.h"
                     19: #endif
                     20:
1.126     kristaps   21: #include <sys/types.h>
                     22:
1.1       kristaps   23: #include <assert.h>
1.122     kristaps   24: #include <ctype.h>
1.22      kristaps   25: #include <stdio.h>
1.1       kristaps   26: #include <stdlib.h>
                     27: #include <string.h>
1.113     kristaps   28: #include <time.h>
1.1       kristaps   29:
1.137     kristaps   30: #include "mandoc.h"
1.101     kristaps   31: #include "chars.h"
1.107     kristaps   32: #include "out.h"
1.71      kristaps   33: #include "term.h"
                     34: #include "man.h"
                     35: #include "mdoc.h"
1.105     kristaps   36: #include "main.h"
1.1       kristaps   37:
1.134     joerg      38: static struct termp     *term_alloc(enum termenc, size_t);
1.71      kristaps   39: static void              term_free(struct termp *);
1.125     kristaps   40: static void              spec(struct termp *, const char *, size_t);
                     41: static void              res(struct termp *, const char *, size_t);
                     42: static void              buffera(struct termp *, const char *, size_t);
                     43: static void              bufferc(struct termp *, char);
                     44: static void              adjbuf(struct termp *p, size_t);
                     45: static void              encode(struct termp *, const char *, size_t);
1.1       kristaps   46:
                     47:
1.71      kristaps   48: void *
1.134     joerg      49: ascii_alloc(size_t width)
1.10      kristaps   50: {
1.1       kristaps   51:
1.134     joerg      52:        return(term_alloc(TERMENC_ASCII, width));
1.1       kristaps   53: }
                     54:
                     55:
1.99      kristaps   56: void
1.71      kristaps   57: terminal_free(void *arg)
1.11      kristaps   58: {
                     59:
1.71      kristaps   60:        term_free((struct termp *)arg);
1.11      kristaps   61: }
                     62:
                     63:
1.71      kristaps   64: static void
                     65: term_free(struct termp *p)
1.14      kristaps   66: {
                     67:
1.71      kristaps   68:        if (p->buf)
                     69:                free(p->buf);
1.102     kristaps   70:        if (p->symtab)
1.101     kristaps   71:                chars_free(p->symtab);
1.14      kristaps   72:
1.71      kristaps   73:        free(p);
1.14      kristaps   74: }
                     75:
                     76:
1.71      kristaps   77: static struct termp *
1.134     joerg      78: term_alloc(enum termenc enc, size_t width)
1.14      kristaps   79: {
1.71      kristaps   80:        struct termp *p;
1.14      kristaps   81:
1.117     kristaps   82:        p = calloc(1, sizeof(struct termp));
                     83:        if (NULL == p) {
1.120     kristaps   84:                perror(NULL);
1.117     kristaps   85:                exit(EXIT_FAILURE);
                     86:        }
1.138   ! schwarze   87:        p->tabwidth = 5;
1.71      kristaps   88:        p->enc = enc;
1.134     joerg      89:        /* Enforce some lower boundary. */
                     90:        if (width < 60)
                     91:                width = 60;
                     92:        p->defrmargin = width - 2;
1.71      kristaps   93:        return(p);
1.14      kristaps   94: }
                     95:
                     96:
1.71      kristaps   97: /*
                     98:  * Flush a line of text.  A "line" is loosely defined as being something
                     99:  * that should be followed by a newline, regardless of whether it's
                    100:  * broken apart by newlines getting there.  A line can also be a
1.130     kristaps  101:  * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
                    102:  * not have a trailing newline.
1.71      kristaps  103:  *
1.130     kristaps  104:  * The following flags may be specified:
1.71      kristaps  105:  *
                    106:  *  - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
                    107:  *    offset value.  This is useful when doing columnar lists where the
                    108:  *    prior column has right-padded.
                    109:  *
                    110:  *  - TERMP_NOBREAK: this is the most important and is used when making
                    111:  *    columns.  In short: don't print a newline and instead pad to the
                    112:  *    right margin.  Used in conjunction with TERMP_NOLPAD.
                    113:  *
1.91      kristaps  114:  *  - TERMP_TWOSPACE: when padding, make sure there are at least two
                    115:  *    space characters of padding.  Otherwise, rather break the line.
                    116:  *
1.84      kristaps  117:  *  - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
                    118:  *    the line is overrun, and don't pad-right if it's underrun.
                    119:  *
                    120:  *  - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
                    121:  *    overruning, instead save the position and continue at that point
                    122:  *    when the next invocation.
1.71      kristaps  123:  *
                    124:  *  In-line line breaking:
                    125:  *
                    126:  *  If TERMP_NOBREAK is specified and the line overruns the right
                    127:  *  margin, it will break and pad-right to the right margin after
                    128:  *  writing.  If maxrmargin is violated, it will break and continue
1.114     kristaps  129:  *  writing from the right-margin, which will lead to the above scenario
                    130:  *  upon exit.  Otherwise, the line will break at the right margin.
1.71      kristaps  131:  */
                    132: void
                    133: term_flushln(struct termp *p)
1.53      kristaps  134: {
1.114     kristaps  135:        int              i;     /* current input position in p->buf */
                    136:        size_t           vis;   /* current visual position on output */
                    137:        size_t           vbl;   /* number of blanks to prepend to output */
1.136     schwarze  138:        size_t           vend;  /* end of word visual position on output */
1.114     kristaps  139:        size_t           bp;    /* visual right border position */
                    140:        int              j;     /* temporary loop index */
                    141:        size_t           maxvis, mmax;
1.53      kristaps  142:
1.71      kristaps  143:        /*
                    144:         * First, establish the maximum columns of "visible" content.
                    145:         * This is usually the difference between the right-margin and
                    146:         * an indentation, but can be, for tagged lists or columns, a
1.115     kristaps  147:         * small set of values.
1.71      kristaps  148:         */
1.53      kristaps  149:
1.71      kristaps  150:        assert(p->offset < p->rmargin);
1.92      kristaps  151:
1.129     kristaps  152:        maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  153:                /* LINTED */
1.129     kristaps  154:                0 : p->rmargin - p->offset - p->overstep;
                    155:        mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  156:                /* LINTED */
1.129     kristaps  157:                0 : p->maxrmargin - p->offset - p->overstep;
1.92      kristaps  158:
1.71      kristaps  159:        bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115     kristaps  160:
1.136     schwarze  161:        /*
                    162:         * Indent the first line of a paragraph.
                    163:         */
                    164:        vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
                    165:
1.115     kristaps  166:        /*
                    167:         * FIXME: if bp is zero, we still output the first word before
                    168:         * breaking the line.
                    169:         */
                    170:
1.136     schwarze  171:        vis = vend = i = 0;
                    172:        while (i < (int)p->col) {
1.71      kristaps  173:
                    174:                /*
1.138   ! schwarze  175:                 * Handle literal tab characters.
        !           176:                 */
        !           177:                for (j = i; j < (int)p->col; j++) {
        !           178:                        if ('\t' != p->buf[j])
        !           179:                                break;
        !           180:                        vend = (vis/p->tabwidth+1)*p->tabwidth;
        !           181:                        vbl += vend - vis;
        !           182:                        vis = vend;
        !           183:                }
        !           184:
        !           185:                /*
1.71      kristaps  186:                 * Count up visible word characters.  Control sequences
                    187:                 * (starting with the CSI) aren't counted.  A space
                    188:                 * generates a non-printing word, which is valid (the
                    189:                 * space is printed according to regular spacing rules).
                    190:                 */
                    191:
                    192:                /* LINTED */
1.138   ! schwarze  193:                for ( ; j < (int)p->col; j++) {
        !           194:                        if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71      kristaps  195:                                break;
1.130     kristaps  196:                        if (8 == p->buf[j])
1.136     schwarze  197:                                vend--;
1.71      kristaps  198:                        else
1.136     schwarze  199:                                vend++;
1.71      kristaps  200:                }
1.53      kristaps  201:
1.71      kristaps  202:                /*
1.81      kristaps  203:                 * Find out whether we would exceed the right margin.
1.136     schwarze  204:                 * If so, break to the next line.
1.81      kristaps  205:                 */
1.136     schwarze  206:                if (vend > bp && vis > 0) {
                    207:                        vend -= vis;
1.81      kristaps  208:                        putchar('\n');
                    209:                        if (TERMP_NOBREAK & p->flags) {
                    210:                                for (j = 0; j < (int)p->rmargin; j++)
                    211:                                        putchar(' ');
1.136     schwarze  212:                                vend += p->rmargin - p->offset;
1.81      kristaps  213:                        } else {
1.136     schwarze  214:                                vbl = p->offset;
1.81      kristaps  215:                        }
1.130     kristaps  216:
1.129     kristaps  217:                        /* Remove the p->overstep width. */
1.130     kristaps  218:
1.112     kristaps  219:                        bp += (int)/* LINTED */
1.129     kristaps  220:                                p->overstep;
                    221:                        p->overstep = 0;
1.71      kristaps  222:                }
1.53      kristaps  223:
1.138   ! schwarze  224:                /*
        !           225:                 * Skip leading tabs, they were handled above.
        !           226:                 */
        !           227:                while (i < (int)p->col && '\t' == p->buf[i])
        !           228:                        i++;
        !           229:
1.130     kristaps  230:                /* Write out the [remaining] word. */
1.136     schwarze  231:                for ( ; i < (int)p->col; i++) {
1.138   ! schwarze  232:                        if ('\t' == p->buf[i])
        !           233:                                break;
1.136     schwarze  234:                        if (' ' == p->buf[i]) {
                    235:                                while (' ' == p->buf[i]) {
                    236:                                        vbl++;
                    237:                                        i++;
                    238:                                }
1.71      kristaps  239:                                break;
1.136     schwarze  240:                        }
                    241:                        if (ASCII_NBRSP == p->buf[i]) {
                    242:                                vbl++;
                    243:                                continue;
                    244:                        }
1.130     kristaps  245:
1.136     schwarze  246:                        /*
                    247:                         * Now we definitely know there will be
                    248:                         * printable characters to output,
                    249:                         * so write preceding white space now.
                    250:                         */
                    251:                        if (vbl) {
                    252:                                for (j = 0; j < (int)vbl; j++)
                    253:                                        putchar(' ');
                    254:                                vbl = 0;
                    255:                        }
                    256:                        putchar(p->buf[i]);
                    257:                }
                    258:                vend += vbl;
                    259:                vis = vend;
1.71      kristaps  260:        }
1.111     kristaps  261:
1.91      kristaps  262:        p->col = 0;
1.129     kristaps  263:        p->overstep = 0;
1.15      kristaps  264:
1.91      kristaps  265:        if ( ! (TERMP_NOBREAK & p->flags)) {
                    266:                putchar('\n');
1.15      kristaps  267:                return;
1.71      kristaps  268:        }
1.15      kristaps  269:
1.91      kristaps  270:        if (TERMP_HANG & p->flags) {
                    271:                /* We need one blank after the tag. */
1.129     kristaps  272:                p->overstep = /* LINTED */
1.92      kristaps  273:                        vis - maxvis + 1;
1.91      kristaps  274:
                    275:                /*
                    276:                 * Behave exactly the same way as groff:
1.92      kristaps  277:                 * If we have overstepped the margin, temporarily move
                    278:                 * it to the right and flag the rest of the line to be
                    279:                 * shorter.
1.91      kristaps  280:                 * If we landed right at the margin, be happy.
1.92      kristaps  281:                 * If we are one step before the margin, temporarily
                    282:                 * move it one step LEFT and flag the rest of the line
                    283:                 * to be longer.
1.91      kristaps  284:                 */
1.129     kristaps  285:                if (p->overstep >= -1) {
                    286:                        assert((int)maxvis + p->overstep >= 0);
1.92      kristaps  287:                        /* LINTED */
1.129     kristaps  288:                        maxvis += p->overstep;
1.92      kristaps  289:                } else
1.129     kristaps  290:                        p->overstep = 0;
1.91      kristaps  291:
                    292:        } else if (TERMP_DANGLE & p->flags)
                    293:                return;
1.15      kristaps  294:
1.92      kristaps  295:        /* Right-pad. */
                    296:        if (maxvis > vis + /* LINTED */
                    297:                        ((TERMP_TWOSPACE & p->flags) ? 1 : 0))
1.91      kristaps  298:                for ( ; vis < maxvis; vis++)
                    299:                        putchar(' ');
1.92      kristaps  300:        else {  /* ...or newline break. */
1.71      kristaps  301:                putchar('\n');
1.91      kristaps  302:                for (i = 0; i < (int)p->rmargin; i++)
                    303:                        putchar(' ');
                    304:        }
1.15      kristaps  305: }
                    306:
                    307:
1.71      kristaps  308: /*
                    309:  * A newline only breaks an existing line; it won't assert vertical
                    310:  * space.  All data in the output buffer is flushed prior to the newline
                    311:  * assertion.
                    312:  */
                    313: void
                    314: term_newln(struct termp *p)
1.15      kristaps  315: {
                    316:
1.71      kristaps  317:        p->flags |= TERMP_NOSPACE;
                    318:        if (0 == p->col) {
                    319:                p->flags &= ~TERMP_NOLPAD;
1.15      kristaps  320:                return;
1.16      kristaps  321:        }
1.71      kristaps  322:        term_flushln(p);
                    323:        p->flags &= ~TERMP_NOLPAD;
1.16      kristaps  324: }
                    325:
                    326:
1.71      kristaps  327: /*
                    328:  * Asserts a vertical space (a full, empty line-break between lines).
                    329:  * Note that if used twice, this will cause two blank spaces and so on.
                    330:  * All data in the output buffer is flushed prior to the newline
                    331:  * assertion.
                    332:  */
                    333: void
                    334: term_vspace(struct termp *p)
1.16      kristaps  335: {
                    336:
1.62      kristaps  337:        term_newln(p);
1.71      kristaps  338:        putchar('\n');
1.16      kristaps  339: }
                    340:
                    341:
1.71      kristaps  342: static void
1.125     kristaps  343: spec(struct termp *p, const char *word, size_t len)
1.17      kristaps  344: {
1.71      kristaps  345:        const char      *rhs;
                    346:        size_t           sz;
1.17      kristaps  347:
1.101     kristaps  348:        rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.125     kristaps  349:        if (rhs)
                    350:                encode(p, rhs, sz);
1.94      kristaps  351: }
                    352:
                    353:
                    354: static void
1.125     kristaps  355: res(struct termp *p, const char *word, size_t len)
1.94      kristaps  356: {
                    357:        const char      *rhs;
                    358:        size_t           sz;
                    359:
1.101     kristaps  360:        rhs = chars_a2res(p->symtab, word, len, &sz);
1.125     kristaps  361:        if (rhs)
                    362:                encode(p, rhs, sz);
                    363: }
                    364:
                    365:
                    366: void
                    367: term_fontlast(struct termp *p)
                    368: {
                    369:        enum termfont    f;
                    370:
                    371:        f = p->fontl;
                    372:        p->fontl = p->fontq[p->fonti];
                    373:        p->fontq[p->fonti] = f;
                    374: }
                    375:
                    376:
                    377: void
                    378: term_fontrepl(struct termp *p, enum termfont f)
                    379: {
                    380:
                    381:        p->fontl = p->fontq[p->fonti];
                    382:        p->fontq[p->fonti] = f;
                    383: }
                    384:
                    385:
                    386: void
                    387: term_fontpush(struct termp *p, enum termfont f)
                    388: {
                    389:
                    390:        assert(p->fonti + 1 < 10);
                    391:        p->fontl = p->fontq[p->fonti];
                    392:        p->fontq[++p->fonti] = f;
                    393: }
                    394:
                    395:
                    396: const void *
                    397: term_fontq(struct termp *p)
                    398: {
                    399:
                    400:        return(&p->fontq[p->fonti]);
                    401: }
                    402:
                    403:
                    404: enum termfont
                    405: term_fonttop(struct termp *p)
                    406: {
                    407:
                    408:        return(p->fontq[p->fonti]);
                    409: }
                    410:
                    411:
                    412: void
                    413: term_fontpopq(struct termp *p, const void *key)
                    414: {
                    415:
                    416:        while (p->fonti >= 0 && key != &p->fontq[p->fonti])
                    417:                p->fonti--;
                    418:        assert(p->fonti >= 0);
                    419: }
1.94      kristaps  420:
1.125     kristaps  421:
                    422: void
                    423: term_fontpop(struct termp *p)
                    424: {
                    425:
                    426:        assert(p->fonti);
                    427:        p->fonti--;
1.17      kristaps  428: }
                    429:
                    430:
1.71      kristaps  431: /*
                    432:  * Handle pwords, partial words, which may be either a single word or a
                    433:  * phrase that cannot be broken down (such as a literal string).  This
                    434:  * handles word styling.
                    435:  */
1.86      kristaps  436: void
                    437: term_word(struct termp *p, const char *word)
1.65      kristaps  438: {
1.124     kristaps  439:        const char      *sv, *seq;
1.125     kristaps  440:        int              sz;
1.124     kristaps  441:        size_t           ssz;
                    442:        enum roffdeco    deco;
1.71      kristaps  443:
1.100     kristaps  444:        sv = word;
                    445:
1.123     kristaps  446:        if (word[0] && '\0' == word[1])
1.100     kristaps  447:                switch (word[0]) {
                    448:                case('.'):
                    449:                        /* FALLTHROUGH */
                    450:                case(','):
                    451:                        /* FALLTHROUGH */
                    452:                case(';'):
                    453:                        /* FALLTHROUGH */
                    454:                case(':'):
                    455:                        /* FALLTHROUGH */
                    456:                case('?'):
                    457:                        /* FALLTHROUGH */
                    458:                case('!'):
                    459:                        /* FALLTHROUGH */
                    460:                case(')'):
                    461:                        /* FALLTHROUGH */
                    462:                case(']'):
                    463:                        if ( ! (TERMP_IGNDELIM & p->flags))
                    464:                                p->flags |= TERMP_NOSPACE;
                    465:                        break;
                    466:                default:
                    467:                        break;
                    468:                }
1.65      kristaps  469:
1.133     kristaps  470:        if ( ! (TERMP_NOSPACE & p->flags)) {
1.125     kristaps  471:                bufferc(p, ' ');
1.133     kristaps  472:                if (TERMP_SENTENCE & p->flags)
                    473:                        bufferc(p, ' ');
                    474:        }
1.65      kristaps  475:
1.71      kristaps  476:        if ( ! (p->flags & TERMP_NONOSPACE))
                    477:                p->flags &= ~TERMP_NOSPACE;
1.133     kristaps  478:
                    479:        p->flags &= ~TERMP_SENTENCE;
1.65      kristaps  480:
1.125     kristaps  481:        /* FIXME: use strcspn. */
1.124     kristaps  482:
                    483:        while (*word) {
                    484:                if ('\\' != *word) {
1.125     kristaps  485:                        encode(p, word, 1);
1.124     kristaps  486:                        word++;
                    487:                        continue;
                    488:                }
                    489:
                    490:                seq = ++word;
                    491:                sz = a2roffdeco(&deco, &seq, &ssz);
                    492:
                    493:                switch (deco) {
                    494:                case (DECO_RESERVED):
1.125     kristaps  495:                        res(p, seq, ssz);
1.124     kristaps  496:                        break;
                    497:                case (DECO_SPECIAL):
1.125     kristaps  498:                        spec(p, seq, ssz);
1.124     kristaps  499:                        break;
                    500:                case (DECO_BOLD):
1.125     kristaps  501:                        term_fontrepl(p, TERMFONT_BOLD);
1.124     kristaps  502:                        break;
                    503:                case (DECO_ITALIC):
1.125     kristaps  504:                        term_fontrepl(p, TERMFONT_UNDER);
1.124     kristaps  505:                        break;
                    506:                case (DECO_ROMAN):
1.125     kristaps  507:                        term_fontrepl(p, TERMFONT_NONE);
1.124     kristaps  508:                        break;
                    509:                case (DECO_PREVIOUS):
1.125     kristaps  510:                        term_fontlast(p);
1.124     kristaps  511:                        break;
                    512:                default:
                    513:                        break;
                    514:                }
1.127     kristaps  515:
1.124     kristaps  516:                word += sz;
1.127     kristaps  517:                if (DECO_NOSPACE == deco && '\0' == *word)
                    518:                        p->flags |= TERMP_NOSPACE;
1.124     kristaps  519:        }
1.65      kristaps  520:
1.131     kristaps  521:        /*
                    522:         * Note that we don't process the pipe: the parser sees it as
                    523:         * punctuation, but we don't in terms of typography.
                    524:         */
1.100     kristaps  525:        if (sv[0] && 0 == sv[1])
                    526:                switch (sv[0]) {
                    527:                case('('):
                    528:                        /* FALLTHROUGH */
                    529:                case('['):
                    530:                        p->flags |= TERMP_NOSPACE;
                    531:                        break;
                    532:                default:
                    533:                        break;
                    534:                }
1.65      kristaps  535: }
                    536:
                    537:
1.71      kristaps  538: static void
1.125     kristaps  539: adjbuf(struct termp *p, size_t sz)
1.51      kristaps  540: {
                    541:
1.125     kristaps  542:        if (0 == p->maxcols)
                    543:                p->maxcols = 1024;
                    544:        while (sz >= p->maxcols)
                    545:                p->maxcols <<= 2;
                    546:
                    547:        p->buf = realloc(p->buf, p->maxcols);
                    548:        if (NULL == p->buf) {
                    549:                perror(NULL);
                    550:                exit(EXIT_FAILURE);
1.71      kristaps  551:        }
1.51      kristaps  552: }
                    553:
1.79      kristaps  554:
                    555: static void
1.125     kristaps  556: buffera(struct termp *p, const char *word, size_t sz)
1.79      kristaps  557: {
1.125     kristaps  558:
                    559:        if (p->col + sz >= p->maxcols)
                    560:                adjbuf(p, p->col + sz);
                    561:
1.126     kristaps  562:        memcpy(&p->buf[(int)p->col], word, sz);
1.125     kristaps  563:        p->col += sz;
                    564: }
                    565:
                    566:
                    567: static void
                    568: bufferc(struct termp *p, char c)
                    569: {
                    570:
                    571:        if (p->col + 1 >= p->maxcols)
                    572:                adjbuf(p, p->col + 1);
                    573:
1.126     kristaps  574:        p->buf[(int)p->col++] = c;
1.125     kristaps  575: }
                    576:
                    577:
                    578: static void
                    579: encode(struct termp *p, const char *word, size_t sz)
                    580: {
                    581:        enum termfont     f;
                    582:        int               i;
                    583:
                    584:        /*
                    585:         * Encode and buffer a string of characters.  If the current
                    586:         * font mode is unset, buffer directly, else encode then buffer
                    587:         * character by character.
                    588:         */
                    589:
                    590:        if (TERMFONT_NONE == (f = term_fonttop(p))) {
                    591:                buffera(p, word, sz);
                    592:                return;
                    593:        }
                    594:
                    595:        for (i = 0; i < (int)sz; i++) {
                    596:                if ( ! isgraph((u_char)word[i])) {
                    597:                        bufferc(p, word[i]);
                    598:                        continue;
1.79      kristaps  599:                }
1.125     kristaps  600:
                    601:                if (TERMFONT_UNDER == f)
                    602:                        bufferc(p, '_');
                    603:                else
                    604:                        bufferc(p, word[i]);
                    605:
                    606:                bufferc(p, 8);
                    607:                bufferc(p, word[i]);
1.79      kristaps  608:        }
                    609: }
1.106     kristaps  610:
                    611:
1.107     kristaps  612: size_t
                    613: term_vspan(const struct roffsu *su)
1.106     kristaps  614: {
                    615:        double           r;
                    616:
1.107     kristaps  617:        switch (su->unit) {
1.106     kristaps  618:        case (SCALE_CM):
1.107     kristaps  619:                r = su->scale * 2;
1.106     kristaps  620:                break;
                    621:        case (SCALE_IN):
1.107     kristaps  622:                r = su->scale * 6;
1.106     kristaps  623:                break;
                    624:        case (SCALE_PC):
1.107     kristaps  625:                r = su->scale;
1.106     kristaps  626:                break;
                    627:        case (SCALE_PT):
1.107     kristaps  628:                r = su->scale / 8;
1.106     kristaps  629:                break;
                    630:        case (SCALE_MM):
1.107     kristaps  631:                r = su->scale / 1000;
1.106     kristaps  632:                break;
                    633:        case (SCALE_VS):
1.107     kristaps  634:                r = su->scale;
1.106     kristaps  635:                break;
                    636:        default:
1.107     kristaps  637:                r = su->scale - 1;
1.106     kristaps  638:                break;
                    639:        }
                    640:
                    641:        if (r < 0.0)
                    642:                r = 0.0;
1.107     kristaps  643:        return(/* LINTED */(size_t)
1.106     kristaps  644:                        r);
                    645: }
                    646:
                    647:
1.107     kristaps  648: size_t
                    649: term_hspan(const struct roffsu *su)
1.106     kristaps  650: {
                    651:        double           r;
                    652:
1.108     kristaps  653:        /* XXX: CM, IN, and PT are approximations. */
                    654:
1.107     kristaps  655:        switch (su->unit) {
1.106     kristaps  656:        case (SCALE_CM):
1.108     kristaps  657:                r = 4 * su->scale;
1.106     kristaps  658:                break;
                    659:        case (SCALE_IN):
1.108     kristaps  660:                /* XXX: this is an approximation. */
                    661:                r = 10 * su->scale;
1.106     kristaps  662:                break;
                    663:        case (SCALE_PC):
1.108     kristaps  664:                r = (10 * su->scale) / 6;
1.106     kristaps  665:                break;
                    666:        case (SCALE_PT):
1.108     kristaps  667:                r = (10 * su->scale) / 72;
1.106     kristaps  668:                break;
                    669:        case (SCALE_MM):
1.107     kristaps  670:                r = su->scale / 1000; /* FIXME: double-check. */
1.106     kristaps  671:                break;
                    672:        case (SCALE_VS):
1.107     kristaps  673:                r = su->scale * 2 - 1; /* FIXME: double-check. */
1.106     kristaps  674:                break;
                    675:        default:
1.107     kristaps  676:                r = su->scale;
1.106     kristaps  677:                break;
                    678:        }
                    679:
                    680:        if (r < 0.0)
                    681:                r = 0.0;
1.107     kristaps  682:        return((size_t)/* LINTED */
1.106     kristaps  683:                        r);
                    684: }
                    685:
                    686:

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