[BACK]Return to term.c CVS log [TXT][DIR] Up to [cvsweb.bsd.lv] / mandoc

Annotation of mandoc/term.c, Revision 1.160

1.160   ! kristaps    1: /*     $Id: term.c,v 1.159 2010/07/04 22:04:04 schwarze Exp $ */
1.1       kristaps    2: /*
1.159     schwarze    3:  * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
                      4:  * Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
1.1       kristaps    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
1.74      kristaps    7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    9:  *
1.74      kristaps   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.
1.1       kristaps   17:  */
1.128     kristaps   18: #ifdef HAVE_CONFIG_H
                     19: #include "config.h"
                     20: #endif
                     21:
1.126     kristaps   22: #include <sys/types.h>
                     23:
1.1       kristaps   24: #include <assert.h>
1.122     kristaps   25: #include <ctype.h>
1.141     kristaps   26: #include <stdint.h>
1.22      kristaps   27: #include <stdio.h>
1.1       kristaps   28: #include <stdlib.h>
                     29: #include <string.h>
                     30:
1.137     kristaps   31: #include "mandoc.h"
1.101     kristaps   32: #include "chars.h"
1.107     kristaps   33: #include "out.h"
1.71      kristaps   34: #include "term.h"
1.105     kristaps   35: #include "main.h"
1.1       kristaps   36:
1.125     kristaps   37: static void              spec(struct termp *, const char *, size_t);
                     38: static void              res(struct termp *, const char *, size_t);
                     39: static void              buffera(struct termp *, const char *, size_t);
                     40: static void              bufferc(struct termp *, char);
                     41: static void              adjbuf(struct termp *p, size_t);
                     42: static void              encode(struct termp *, const char *, size_t);
1.11      kristaps   43:
                     44:
1.145     kristaps   45: void
1.71      kristaps   46: term_free(struct termp *p)
1.14      kristaps   47: {
                     48:
1.71      kristaps   49:        if (p->buf)
                     50:                free(p->buf);
1.102     kristaps   51:        if (p->symtab)
1.101     kristaps   52:                chars_free(p->symtab);
1.145     kristaps   53:
1.142     kristaps   54:        free(p);
                     55: }
                     56:
                     57:
                     58: void
                     59: term_begin(struct termp *p, term_margin head,
                     60:                term_margin foot, const void *arg)
                     61: {
                     62:
                     63:        p->headf = head;
                     64:        p->footf = foot;
                     65:        p->argf = arg;
1.146     kristaps   66:        (*p->begin)(p);
1.142     kristaps   67: }
                     68:
                     69:
                     70: void
                     71: term_end(struct termp *p)
                     72: {
                     73:
1.146     kristaps   74:        (*p->end)(p);
1.14      kristaps   75: }
                     76:
                     77:
1.145     kristaps   78: struct termp *
                     79: term_alloc(enum termenc enc)
1.14      kristaps   80: {
1.141     kristaps   81:        struct termp    *p;
1.14      kristaps   82:
1.117     kristaps   83:        p = calloc(1, sizeof(struct termp));
                     84:        if (NULL == p) {
1.120     kristaps   85:                perror(NULL);
1.117     kristaps   86:                exit(EXIT_FAILURE);
                     87:        }
1.141     kristaps   88:
1.71      kristaps   89:        p->enc = enc;
                     90:        return(p);
1.14      kristaps   91: }
                     92:
                     93:
1.71      kristaps   94: /*
                     95:  * Flush a line of text.  A "line" is loosely defined as being something
                     96:  * that should be followed by a newline, regardless of whether it's
                     97:  * broken apart by newlines getting there.  A line can also be a
1.130     kristaps   98:  * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
                     99:  * not have a trailing newline.
1.71      kristaps  100:  *
1.130     kristaps  101:  * The following flags may be specified:
1.71      kristaps  102:  *
                    103:  *  - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
                    104:  *    offset value.  This is useful when doing columnar lists where the
                    105:  *    prior column has right-padded.
                    106:  *
                    107:  *  - TERMP_NOBREAK: this is the most important and is used when making
                    108:  *    columns.  In short: don't print a newline and instead pad to the
                    109:  *    right margin.  Used in conjunction with TERMP_NOLPAD.
                    110:  *
1.91      kristaps  111:  *  - TERMP_TWOSPACE: when padding, make sure there are at least two
                    112:  *    space characters of padding.  Otherwise, rather break the line.
                    113:  *
1.84      kristaps  114:  *  - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
                    115:  *    the line is overrun, and don't pad-right if it's underrun.
                    116:  *
                    117:  *  - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
                    118:  *    overruning, instead save the position and continue at that point
                    119:  *    when the next invocation.
1.71      kristaps  120:  *
                    121:  *  In-line line breaking:
                    122:  *
                    123:  *  If TERMP_NOBREAK is specified and the line overruns the right
                    124:  *  margin, it will break and pad-right to the right margin after
                    125:  *  writing.  If maxrmargin is violated, it will break and continue
1.114     kristaps  126:  *  writing from the right-margin, which will lead to the above scenario
                    127:  *  upon exit.  Otherwise, the line will break at the right margin.
1.71      kristaps  128:  */
                    129: void
                    130: term_flushln(struct termp *p)
1.53      kristaps  131: {
1.114     kristaps  132:        int              i;     /* current input position in p->buf */
                    133:        size_t           vis;   /* current visual position on output */
                    134:        size_t           vbl;   /* number of blanks to prepend to output */
1.136     schwarze  135:        size_t           vend;  /* end of word visual position on output */
1.114     kristaps  136:        size_t           bp;    /* visual right border position */
1.152     kristaps  137:        int              j;     /* temporary loop index for p->buf */
                    138:        int              jhy;   /* last hyph before overflow w/r/t j */
                    139:        size_t           maxvis; /* output position of visible boundary */
                    140:        size_t           mmax; /* used in calculating bp */
1.53      kristaps  141:
1.71      kristaps  142:        /*
                    143:         * First, establish the maximum columns of "visible" content.
                    144:         * This is usually the difference between the right-margin and
                    145:         * an indentation, but can be, for tagged lists or columns, a
1.115     kristaps  146:         * small set of values.
1.71      kristaps  147:         */
1.53      kristaps  148:
1.71      kristaps  149:        assert(p->offset < p->rmargin);
1.92      kristaps  150:
1.129     kristaps  151:        maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  152:                /* LINTED */
1.129     kristaps  153:                0 : p->rmargin - p->offset - p->overstep;
                    154:        mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  155:                /* LINTED */
1.129     kristaps  156:                0 : p->maxrmargin - p->offset - p->overstep;
1.92      kristaps  157:
1.71      kristaps  158:        bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115     kristaps  159:
1.136     schwarze  160:        /*
                    161:         * Indent the first line of a paragraph.
                    162:         */
                    163:        vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
                    164:
1.154     kristaps  165:        vis = vend = i = 0;
1.115     kristaps  166:
1.136     schwarze  167:        while (i < (int)p->col) {
1.71      kristaps  168:                /*
1.154     kristaps  169:                 * Handle literal tab characters: collapse all
                    170:                 * subsequent tabs into a single huge set of spaces.
1.138     schwarze  171:                 */
                    172:                for (j = i; j < (int)p->col; j++) {
                    173:                        if ('\t' != p->buf[j])
                    174:                                break;
1.154     kristaps  175:                        vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138     schwarze  176:                        vbl += vend - vis;
                    177:                        vis = vend;
                    178:                }
                    179:
                    180:                /*
1.71      kristaps  181:                 * Count up visible word characters.  Control sequences
                    182:                 * (starting with the CSI) aren't counted.  A space
                    183:                 * generates a non-printing word, which is valid (the
                    184:                 * space is printed according to regular spacing rules).
                    185:                 */
                    186:
                    187:                /* LINTED */
1.140     kristaps  188:                for (jhy = 0; j < (int)p->col; j++) {
1.138     schwarze  189:                        if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71      kristaps  190:                                break;
1.154     kristaps  191:
                    192:                        /* Back over the the last printed character. */
                    193:                        if (8 == p->buf[j]) {
1.153     kristaps  194:                                assert(j);
                    195:                                vend -= (*p->width)(p, p->buf[j - 1]);
1.154     kristaps  196:                                continue;
1.153     kristaps  197:                        }
1.154     kristaps  198:
                    199:                        /* Regular word. */
                    200:                        /* Break at the hyphen point if we overrun. */
                    201:                        if (vend > vis && vend < bp &&
                    202:                                        ASCII_HYPH == p->buf[j])
                    203:                                jhy = j;
                    204:
                    205:                        vend += (*p->width)(p, p->buf[j]);
1.71      kristaps  206:                }
1.53      kristaps  207:
1.71      kristaps  208:                /*
1.81      kristaps  209:                 * Find out whether we would exceed the right margin.
1.136     schwarze  210:                 * If so, break to the next line.
1.81      kristaps  211:                 */
1.140     kristaps  212:                if (vend > bp && 0 == jhy && vis > 0) {
1.136     schwarze  213:                        vend -= vis;
1.146     kristaps  214:                        (*p->endline)(p);
1.81      kristaps  215:                        if (TERMP_NOBREAK & p->flags) {
1.139     schwarze  216:                                p->viscol = p->rmargin;
1.146     kristaps  217:                                (*p->advance)(p, p->rmargin);
1.136     schwarze  218:                                vend += p->rmargin - p->offset;
1.81      kristaps  219:                        } else {
1.139     schwarze  220:                                p->viscol = 0;
1.136     schwarze  221:                                vbl = p->offset;
1.81      kristaps  222:                        }
1.130     kristaps  223:
1.129     kristaps  224:                        /* Remove the p->overstep width. */
1.130     kristaps  225:
1.112     kristaps  226:                        bp += (int)/* LINTED */
1.129     kristaps  227:                                p->overstep;
                    228:                        p->overstep = 0;
1.71      kristaps  229:                }
1.53      kristaps  230:
1.138     schwarze  231:                /*
                    232:                 * Skip leading tabs, they were handled above.
                    233:                 */
                    234:                while (i < (int)p->col && '\t' == p->buf[i])
                    235:                        i++;
                    236:
1.130     kristaps  237:                /* Write out the [remaining] word. */
1.136     schwarze  238:                for ( ; i < (int)p->col; i++) {
1.140     kristaps  239:                        if (vend > bp && jhy > 0 && i > jhy)
                    240:                                break;
1.138     schwarze  241:                        if ('\t' == p->buf[i])
                    242:                                break;
1.136     schwarze  243:                        if (' ' == p->buf[i]) {
                    244:                                while (' ' == p->buf[i]) {
1.153     kristaps  245:                                        vbl += (*p->width)(p, p->buf[i]);
1.136     schwarze  246:                                        i++;
                    247:                                }
1.71      kristaps  248:                                break;
1.136     schwarze  249:                        }
                    250:                        if (ASCII_NBRSP == p->buf[i]) {
1.153     kristaps  251:                                vbl += (*p->width)(p, ' ');
1.136     schwarze  252:                                continue;
                    253:                        }
1.130     kristaps  254:
1.136     schwarze  255:                        /*
                    256:                         * Now we definitely know there will be
                    257:                         * printable characters to output,
                    258:                         * so write preceding white space now.
                    259:                         */
                    260:                        if (vbl) {
1.146     kristaps  261:                                (*p->advance)(p, vbl);
1.139     schwarze  262:                                p->viscol += vbl;
1.136     schwarze  263:                                vbl = 0;
                    264:                        }
1.140     kristaps  265:
1.153     kristaps  266:                        if (ASCII_HYPH == p->buf[i]) {
1.146     kristaps  267:                                (*p->letter)(p, '-');
1.153     kristaps  268:                                p->viscol += (*p->width)(p, '-');
                    269:                        } else {
1.146     kristaps  270:                                (*p->letter)(p, p->buf[i]);
1.153     kristaps  271:                                p->viscol += (*p->width)(p, p->buf[i]);
                    272:                        }
1.136     schwarze  273:                }
                    274:                vend += vbl;
                    275:                vis = vend;
1.71      kristaps  276:        }
1.111     kristaps  277:
1.91      kristaps  278:        p->col = 0;
1.129     kristaps  279:        p->overstep = 0;
1.15      kristaps  280:
1.91      kristaps  281:        if ( ! (TERMP_NOBREAK & p->flags)) {
1.139     schwarze  282:                p->viscol = 0;
1.146     kristaps  283:                (*p->endline)(p);
1.15      kristaps  284:                return;
1.71      kristaps  285:        }
1.15      kristaps  286:
1.91      kristaps  287:        if (TERMP_HANG & p->flags) {
                    288:                /* We need one blank after the tag. */
1.129     kristaps  289:                p->overstep = /* LINTED */
1.153     kristaps  290:                        vis - maxvis + (*p->width)(p, ' ');
1.91      kristaps  291:
                    292:                /*
                    293:                 * Behave exactly the same way as groff:
1.92      kristaps  294:                 * If we have overstepped the margin, temporarily move
                    295:                 * it to the right and flag the rest of the line to be
                    296:                 * shorter.
1.91      kristaps  297:                 * If we landed right at the margin, be happy.
1.92      kristaps  298:                 * If we are one step before the margin, temporarily
                    299:                 * move it one step LEFT and flag the rest of the line
                    300:                 * to be longer.
1.91      kristaps  301:                 */
1.129     kristaps  302:                if (p->overstep >= -1) {
                    303:                        assert((int)maxvis + p->overstep >= 0);
1.92      kristaps  304:                        /* LINTED */
1.129     kristaps  305:                        maxvis += p->overstep;
1.92      kristaps  306:                } else
1.129     kristaps  307:                        p->overstep = 0;
1.91      kristaps  308:
                    309:        } else if (TERMP_DANGLE & p->flags)
                    310:                return;
1.15      kristaps  311:
1.92      kristaps  312:        /* Right-pad. */
                    313:        if (maxvis > vis + /* LINTED */
1.154     kristaps  314:                        ((TERMP_TWOSPACE & p->flags) ?
                    315:                         (*p->width)(p, ' ') : 0)) {
1.139     schwarze  316:                p->viscol += maxvis - vis;
1.146     kristaps  317:                (*p->advance)(p, maxvis - vis);
1.142     kristaps  318:                vis += (maxvis - vis);
1.139     schwarze  319:        } else {        /* ...or newline break. */
1.146     kristaps  320:                (*p->endline)(p);
1.139     schwarze  321:                p->viscol = p->rmargin;
1.146     kristaps  322:                (*p->advance)(p, p->rmargin);
1.91      kristaps  323:        }
1.15      kristaps  324: }
                    325:
                    326:
1.71      kristaps  327: /*
                    328:  * A newline only breaks an existing line; it won't assert vertical
                    329:  * space.  All data in the output buffer is flushed prior to the newline
                    330:  * assertion.
                    331:  */
                    332: void
                    333: term_newln(struct termp *p)
1.15      kristaps  334: {
                    335:
1.71      kristaps  336:        p->flags |= TERMP_NOSPACE;
1.139     schwarze  337:        if (0 == p->col && 0 == p->viscol) {
1.71      kristaps  338:                p->flags &= ~TERMP_NOLPAD;
1.15      kristaps  339:                return;
1.16      kristaps  340:        }
1.71      kristaps  341:        term_flushln(p);
                    342:        p->flags &= ~TERMP_NOLPAD;
1.16      kristaps  343: }
                    344:
                    345:
1.71      kristaps  346: /*
                    347:  * Asserts a vertical space (a full, empty line-break between lines).
                    348:  * Note that if used twice, this will cause two blank spaces and so on.
                    349:  * All data in the output buffer is flushed prior to the newline
                    350:  * assertion.
                    351:  */
                    352: void
                    353: term_vspace(struct termp *p)
1.16      kristaps  354: {
                    355:
1.62      kristaps  356:        term_newln(p);
1.139     schwarze  357:        p->viscol = 0;
1.146     kristaps  358:        (*p->endline)(p);
1.16      kristaps  359: }
                    360:
                    361:
1.71      kristaps  362: static void
1.125     kristaps  363: spec(struct termp *p, const char *word, size_t len)
1.17      kristaps  364: {
1.71      kristaps  365:        const char      *rhs;
                    366:        size_t           sz;
1.17      kristaps  367:
1.101     kristaps  368:        rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.125     kristaps  369:        if (rhs)
                    370:                encode(p, rhs, sz);
1.94      kristaps  371: }
                    372:
                    373:
                    374: static void
1.125     kristaps  375: res(struct termp *p, const char *word, size_t len)
1.94      kristaps  376: {
                    377:        const char      *rhs;
                    378:        size_t           sz;
                    379:
1.101     kristaps  380:        rhs = chars_a2res(p->symtab, word, len, &sz);
1.125     kristaps  381:        if (rhs)
                    382:                encode(p, rhs, sz);
                    383: }
                    384:
                    385:
                    386: void
                    387: term_fontlast(struct termp *p)
                    388: {
                    389:        enum termfont    f;
                    390:
                    391:        f = p->fontl;
                    392:        p->fontl = p->fontq[p->fonti];
                    393:        p->fontq[p->fonti] = f;
                    394: }
                    395:
                    396:
                    397: void
                    398: term_fontrepl(struct termp *p, enum termfont f)
                    399: {
                    400:
                    401:        p->fontl = p->fontq[p->fonti];
                    402:        p->fontq[p->fonti] = f;
                    403: }
                    404:
                    405:
                    406: void
                    407: term_fontpush(struct termp *p, enum termfont f)
                    408: {
                    409:
                    410:        assert(p->fonti + 1 < 10);
                    411:        p->fontl = p->fontq[p->fonti];
                    412:        p->fontq[++p->fonti] = f;
                    413: }
                    414:
                    415:
                    416: const void *
                    417: term_fontq(struct termp *p)
                    418: {
                    419:
                    420:        return(&p->fontq[p->fonti]);
                    421: }
                    422:
                    423:
                    424: enum termfont
                    425: term_fonttop(struct termp *p)
                    426: {
                    427:
                    428:        return(p->fontq[p->fonti]);
                    429: }
                    430:
                    431:
                    432: void
                    433: term_fontpopq(struct termp *p, const void *key)
                    434: {
                    435:
                    436:        while (p->fonti >= 0 && key != &p->fontq[p->fonti])
                    437:                p->fonti--;
                    438:        assert(p->fonti >= 0);
                    439: }
1.94      kristaps  440:
1.125     kristaps  441:
                    442: void
                    443: term_fontpop(struct termp *p)
                    444: {
                    445:
                    446:        assert(p->fonti);
                    447:        p->fonti--;
1.17      kristaps  448: }
                    449:
                    450:
1.71      kristaps  451: /*
                    452:  * Handle pwords, partial words, which may be either a single word or a
                    453:  * phrase that cannot be broken down (such as a literal string).  This
                    454:  * handles word styling.
                    455:  */
1.86      kristaps  456: void
                    457: term_word(struct termp *p, const char *word)
1.65      kristaps  458: {
1.124     kristaps  459:        const char      *sv, *seq;
1.125     kristaps  460:        int              sz;
1.124     kristaps  461:        size_t           ssz;
                    462:        enum roffdeco    deco;
1.71      kristaps  463:
1.100     kristaps  464:        sv = word;
                    465:
1.123     kristaps  466:        if (word[0] && '\0' == word[1])
1.100     kristaps  467:                switch (word[0]) {
                    468:                case('.'):
                    469:                        /* FALLTHROUGH */
                    470:                case(','):
                    471:                        /* FALLTHROUGH */
                    472:                case(';'):
                    473:                        /* FALLTHROUGH */
                    474:                case(':'):
                    475:                        /* FALLTHROUGH */
                    476:                case('?'):
                    477:                        /* FALLTHROUGH */
                    478:                case('!'):
                    479:                        /* FALLTHROUGH */
                    480:                case(')'):
                    481:                        /* FALLTHROUGH */
                    482:                case(']'):
                    483:                        if ( ! (TERMP_IGNDELIM & p->flags))
                    484:                                p->flags |= TERMP_NOSPACE;
                    485:                        break;
                    486:                default:
                    487:                        break;
                    488:                }
1.65      kristaps  489:
1.133     kristaps  490:        if ( ! (TERMP_NOSPACE & p->flags)) {
1.151     schwarze  491:                if ( ! (TERMP_KEEP & p->flags)) {
                    492:                        if (TERMP_PREKEEP & p->flags)
                    493:                                p->flags |= TERMP_KEEP;
1.133     kristaps  494:                        bufferc(p, ' ');
1.151     schwarze  495:                        if (TERMP_SENTENCE & p->flags)
                    496:                                bufferc(p, ' ');
                    497:                } else
                    498:                        bufferc(p, ASCII_NBRSP);
1.133     kristaps  499:        }
1.65      kristaps  500:
1.71      kristaps  501:        if ( ! (p->flags & TERMP_NONOSPACE))
                    502:                p->flags &= ~TERMP_NOSPACE;
1.133     kristaps  503:
                    504:        p->flags &= ~TERMP_SENTENCE;
1.65      kristaps  505:
1.125     kristaps  506:        /* FIXME: use strcspn. */
1.124     kristaps  507:
                    508:        while (*word) {
                    509:                if ('\\' != *word) {
1.125     kristaps  510:                        encode(p, word, 1);
1.124     kristaps  511:                        word++;
                    512:                        continue;
                    513:                }
                    514:
                    515:                seq = ++word;
                    516:                sz = a2roffdeco(&deco, &seq, &ssz);
                    517:
                    518:                switch (deco) {
                    519:                case (DECO_RESERVED):
1.125     kristaps  520:                        res(p, seq, ssz);
1.124     kristaps  521:                        break;
                    522:                case (DECO_SPECIAL):
1.125     kristaps  523:                        spec(p, seq, ssz);
1.124     kristaps  524:                        break;
                    525:                case (DECO_BOLD):
1.125     kristaps  526:                        term_fontrepl(p, TERMFONT_BOLD);
1.124     kristaps  527:                        break;
                    528:                case (DECO_ITALIC):
1.125     kristaps  529:                        term_fontrepl(p, TERMFONT_UNDER);
1.124     kristaps  530:                        break;
                    531:                case (DECO_ROMAN):
1.125     kristaps  532:                        term_fontrepl(p, TERMFONT_NONE);
1.124     kristaps  533:                        break;
                    534:                case (DECO_PREVIOUS):
1.125     kristaps  535:                        term_fontlast(p);
1.124     kristaps  536:                        break;
                    537:                default:
                    538:                        break;
                    539:                }
1.127     kristaps  540:
1.124     kristaps  541:                word += sz;
1.127     kristaps  542:                if (DECO_NOSPACE == deco && '\0' == *word)
                    543:                        p->flags |= TERMP_NOSPACE;
1.124     kristaps  544:        }
1.65      kristaps  545:
1.131     kristaps  546:        /*
                    547:         * Note that we don't process the pipe: the parser sees it as
                    548:         * punctuation, but we don't in terms of typography.
                    549:         */
1.100     kristaps  550:        if (sv[0] && 0 == sv[1])
                    551:                switch (sv[0]) {
                    552:                case('('):
                    553:                        /* FALLTHROUGH */
                    554:                case('['):
                    555:                        p->flags |= TERMP_NOSPACE;
                    556:                        break;
                    557:                default:
                    558:                        break;
                    559:                }
1.65      kristaps  560: }
                    561:
                    562:
1.71      kristaps  563: static void
1.125     kristaps  564: adjbuf(struct termp *p, size_t sz)
1.51      kristaps  565: {
                    566:
1.125     kristaps  567:        if (0 == p->maxcols)
                    568:                p->maxcols = 1024;
                    569:        while (sz >= p->maxcols)
                    570:                p->maxcols <<= 2;
                    571:
                    572:        p->buf = realloc(p->buf, p->maxcols);
                    573:        if (NULL == p->buf) {
                    574:                perror(NULL);
                    575:                exit(EXIT_FAILURE);
1.71      kristaps  576:        }
1.51      kristaps  577: }
                    578:
1.79      kristaps  579:
                    580: static void
1.125     kristaps  581: buffera(struct termp *p, const char *word, size_t sz)
1.79      kristaps  582: {
1.125     kristaps  583:
                    584:        if (p->col + sz >= p->maxcols)
                    585:                adjbuf(p, p->col + sz);
                    586:
1.126     kristaps  587:        memcpy(&p->buf[(int)p->col], word, sz);
1.125     kristaps  588:        p->col += sz;
                    589: }
                    590:
                    591:
                    592: static void
                    593: bufferc(struct termp *p, char c)
                    594: {
                    595:
                    596:        if (p->col + 1 >= p->maxcols)
                    597:                adjbuf(p, p->col + 1);
                    598:
1.126     kristaps  599:        p->buf[(int)p->col++] = c;
1.125     kristaps  600: }
                    601:
                    602:
                    603: static void
                    604: encode(struct termp *p, const char *word, size_t sz)
                    605: {
                    606:        enum termfont     f;
                    607:        int               i;
                    608:
                    609:        /*
                    610:         * Encode and buffer a string of characters.  If the current
                    611:         * font mode is unset, buffer directly, else encode then buffer
                    612:         * character by character.
                    613:         */
                    614:
1.147     kristaps  615:        if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.125     kristaps  616:                buffera(p, word, sz);
                    617:                return;
                    618:        }
                    619:
                    620:        for (i = 0; i < (int)sz; i++) {
                    621:                if ( ! isgraph((u_char)word[i])) {
                    622:                        bufferc(p, word[i]);
                    623:                        continue;
1.79      kristaps  624:                }
1.125     kristaps  625:
                    626:                if (TERMFONT_UNDER == f)
                    627:                        bufferc(p, '_');
                    628:                else
                    629:                        bufferc(p, word[i]);
                    630:
                    631:                bufferc(p, 8);
                    632:                bufferc(p, word[i]);
1.79      kristaps  633:        }
                    634: }
1.106     kristaps  635:
                    636:
1.107     kristaps  637: size_t
1.149     kristaps  638: term_len(const struct termp *p, size_t sz)
                    639: {
                    640:
                    641:        return((*p->width)(p, ' ') * sz);
                    642: }
                    643:
                    644:
                    645: size_t
                    646: term_strlen(const struct termp *p, const char *cp)
                    647: {
                    648:        size_t           sz;
                    649:
                    650:        for (sz = 0; *cp; cp++)
                    651:                sz += (*p->width)(p, *cp);
                    652:
                    653:        return(sz);
                    654: }
                    655:
                    656:
1.157     kristaps  657: /* ARGSUSED */
1.149     kristaps  658: size_t
                    659: term_vspan(const struct termp *p, const struct roffsu *su)
1.106     kristaps  660: {
                    661:        double           r;
                    662:
1.107     kristaps  663:        switch (su->unit) {
1.106     kristaps  664:        case (SCALE_CM):
1.107     kristaps  665:                r = su->scale * 2;
1.106     kristaps  666:                break;
                    667:        case (SCALE_IN):
1.107     kristaps  668:                r = su->scale * 6;
1.106     kristaps  669:                break;
                    670:        case (SCALE_PC):
1.107     kristaps  671:                r = su->scale;
1.106     kristaps  672:                break;
                    673:        case (SCALE_PT):
1.107     kristaps  674:                r = su->scale / 8;
1.106     kristaps  675:                break;
                    676:        case (SCALE_MM):
1.107     kristaps  677:                r = su->scale / 1000;
1.106     kristaps  678:                break;
                    679:        case (SCALE_VS):
1.107     kristaps  680:                r = su->scale;
1.106     kristaps  681:                break;
                    682:        default:
1.107     kristaps  683:                r = su->scale - 1;
1.106     kristaps  684:                break;
                    685:        }
                    686:
                    687:        if (r < 0.0)
                    688:                r = 0.0;
1.107     kristaps  689:        return(/* LINTED */(size_t)
1.106     kristaps  690:                        r);
                    691: }
                    692:
                    693:
1.107     kristaps  694: size_t
1.149     kristaps  695: term_hspan(const struct termp *p, const struct roffsu *su)
1.106     kristaps  696: {
1.156     kristaps  697:        double           v;
1.108     kristaps  698:
1.156     kristaps  699:        v = ((*p->hspan)(p, su));
                    700:        if (v < 0.0)
                    701:                v = 0.0;
                    702:        return((size_t) /* LINTED */
                    703:                        v);
1.106     kristaps  704: }

CVSweb