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

Annotation of mandoc/term.c, Revision 1.150

1.150   ! kristaps    1: /*     $Id: term.c,v 1.149 2010/06/25 18:53:14 kristaps Exp $ */
1.1       kristaps    2: /*
1.148     kristaps    3:  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
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>
1.141     kristaps   25: #include <stdint.h>
1.22      kristaps   26: #include <stdio.h>
1.1       kristaps   27: #include <stdlib.h>
                     28: #include <string.h>
                     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"
1.105     kristaps   34: #include "main.h"
1.1       kristaps   35:
1.125     kristaps   36: static void              spec(struct termp *, const char *, size_t);
                     37: static void              res(struct termp *, const char *, size_t);
                     38: static void              buffera(struct termp *, const char *, size_t);
                     39: static void              bufferc(struct termp *, char);
                     40: static void              adjbuf(struct termp *p, size_t);
                     41: static void              encode(struct termp *, const char *, size_t);
1.11      kristaps   42:
                     43:
1.145     kristaps   44: void
1.71      kristaps   45: term_free(struct termp *p)
1.14      kristaps   46: {
                     47:
1.71      kristaps   48:        if (p->buf)
                     49:                free(p->buf);
1.102     kristaps   50:        if (p->symtab)
1.101     kristaps   51:                chars_free(p->symtab);
1.145     kristaps   52:
1.142     kristaps   53:        free(p);
                     54: }
                     55:
                     56:
                     57: void
                     58: term_begin(struct termp *p, term_margin head,
                     59:                term_margin foot, const void *arg)
                     60: {
                     61:
                     62:        p->headf = head;
                     63:        p->footf = foot;
                     64:        p->argf = arg;
1.146     kristaps   65:        (*p->begin)(p);
1.142     kristaps   66: }
                     67:
                     68:
                     69: void
                     70: term_end(struct termp *p)
                     71: {
                     72:
1.146     kristaps   73:        (*p->end)(p);
1.14      kristaps   74: }
                     75:
                     76:
1.145     kristaps   77: struct termp *
                     78: term_alloc(enum termenc enc)
1.14      kristaps   79: {
1.141     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:        }
1.141     kristaps   87:
1.71      kristaps   88:        p->enc = enc;
                     89:        return(p);
1.14      kristaps   90: }
                     91:
                     92:
1.71      kristaps   93: /*
                     94:  * Flush a line of text.  A "line" is loosely defined as being something
                     95:  * that should be followed by a newline, regardless of whether it's
                     96:  * broken apart by newlines getting there.  A line can also be a
1.130     kristaps   97:  * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
                     98:  * not have a trailing newline.
1.71      kristaps   99:  *
1.130     kristaps  100:  * The following flags may be specified:
1.71      kristaps  101:  *
                    102:  *  - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
                    103:  *    offset value.  This is useful when doing columnar lists where the
                    104:  *    prior column has right-padded.
                    105:  *
                    106:  *  - TERMP_NOBREAK: this is the most important and is used when making
                    107:  *    columns.  In short: don't print a newline and instead pad to the
                    108:  *    right margin.  Used in conjunction with TERMP_NOLPAD.
                    109:  *
1.91      kristaps  110:  *  - TERMP_TWOSPACE: when padding, make sure there are at least two
                    111:  *    space characters of padding.  Otherwise, rather break the line.
                    112:  *
1.84      kristaps  113:  *  - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
                    114:  *    the line is overrun, and don't pad-right if it's underrun.
                    115:  *
                    116:  *  - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
                    117:  *    overruning, instead save the position and continue at that point
                    118:  *    when the next invocation.
1.71      kristaps  119:  *
                    120:  *  In-line line breaking:
                    121:  *
                    122:  *  If TERMP_NOBREAK is specified and the line overruns the right
                    123:  *  margin, it will break and pad-right to the right margin after
                    124:  *  writing.  If maxrmargin is violated, it will break and continue
1.114     kristaps  125:  *  writing from the right-margin, which will lead to the above scenario
                    126:  *  upon exit.  Otherwise, the line will break at the right margin.
1.71      kristaps  127:  */
                    128: void
                    129: term_flushln(struct termp *p)
1.53      kristaps  130: {
1.114     kristaps  131:        int              i;     /* current input position in p->buf */
                    132:        size_t           vis;   /* current visual position on output */
                    133:        size_t           vbl;   /* number of blanks to prepend to output */
1.136     schwarze  134:        size_t           vend;  /* end of word visual position on output */
1.114     kristaps  135:        size_t           bp;    /* visual right border position */
                    136:        int              j;     /* temporary loop index */
1.140     kristaps  137:        int              jhy;   /* last hyphen before line overflow */
1.114     kristaps  138:        size_t           maxvis, mmax;
1.53      kristaps  139:
1.71      kristaps  140:        /*
                    141:         * First, establish the maximum columns of "visible" content.
                    142:         * This is usually the difference between the right-margin and
                    143:         * an indentation, but can be, for tagged lists or columns, a
1.115     kristaps  144:         * small set of values.
1.71      kristaps  145:         */
1.53      kristaps  146:
1.71      kristaps  147:        assert(p->offset < p->rmargin);
1.92      kristaps  148:
1.129     kristaps  149:        maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  150:                /* LINTED */
1.129     kristaps  151:                0 : p->rmargin - p->offset - p->overstep;
                    152:        mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
1.119     kristaps  153:                /* LINTED */
1.129     kristaps  154:                0 : p->maxrmargin - p->offset - p->overstep;
1.92      kristaps  155:
1.71      kristaps  156:        bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115     kristaps  157:
1.136     schwarze  158:        /*
                    159:         * Indent the first line of a paragraph.
                    160:         */
                    161:        vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
                    162:
1.115     kristaps  163:        /*
                    164:         * FIXME: if bp is zero, we still output the first word before
                    165:         * breaking the line.
                    166:         */
                    167:
1.136     schwarze  168:        vis = vend = i = 0;
                    169:        while (i < (int)p->col) {
1.71      kristaps  170:
                    171:                /*
1.138     schwarze  172:                 * Handle literal tab characters.
                    173:                 */
                    174:                for (j = i; j < (int)p->col; j++) {
                    175:                        if ('\t' != p->buf[j])
                    176:                                break;
                    177:                        vend = (vis/p->tabwidth+1)*p->tabwidth;
                    178:                        vbl += vend - vis;
                    179:                        vis = vend;
                    180:                }
                    181:
                    182:                /*
1.71      kristaps  183:                 * Count up visible word characters.  Control sequences
                    184:                 * (starting with the CSI) aren't counted.  A space
                    185:                 * generates a non-printing word, which is valid (the
                    186:                 * space is printed according to regular spacing rules).
                    187:                 */
                    188:
                    189:                /* LINTED */
1.140     kristaps  190:                for (jhy = 0; j < (int)p->col; j++) {
1.138     schwarze  191:                        if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71      kristaps  192:                                break;
1.140     kristaps  193:                        if (8 != p->buf[j]) {
                    194:                                if (vend > vis && vend < bp &&
                    195:                                    ASCII_HYPH == p->buf[j])
                    196:                                        jhy = j;
                    197:                                vend++;
                    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:                 */
1.140     kristaps  206:                if (vend > bp && 0 == jhy && vis > 0) {
1.136     schwarze  207:                        vend -= vis;
1.146     kristaps  208:                        (*p->endline)(p);
1.81      kristaps  209:                        if (TERMP_NOBREAK & p->flags) {
1.139     schwarze  210:                                p->viscol = p->rmargin;
1.146     kristaps  211:                                (*p->advance)(p, p->rmargin);
1.136     schwarze  212:                                vend += p->rmargin - p->offset;
1.81      kristaps  213:                        } else {
1.139     schwarze  214:                                p->viscol = 0;
1.136     schwarze  215:                                vbl = p->offset;
1.81      kristaps  216:                        }
1.130     kristaps  217:
1.129     kristaps  218:                        /* Remove the p->overstep width. */
1.130     kristaps  219:
1.112     kristaps  220:                        bp += (int)/* LINTED */
1.129     kristaps  221:                                p->overstep;
                    222:                        p->overstep = 0;
1.71      kristaps  223:                }
1.53      kristaps  224:
1.138     schwarze  225:                /*
                    226:                 * Skip leading tabs, they were handled above.
                    227:                 */
                    228:                while (i < (int)p->col && '\t' == p->buf[i])
                    229:                        i++;
                    230:
1.130     kristaps  231:                /* Write out the [remaining] word. */
1.136     schwarze  232:                for ( ; i < (int)p->col; i++) {
1.140     kristaps  233:                        if (vend > bp && jhy > 0 && i > jhy)
                    234:                                break;
1.138     schwarze  235:                        if ('\t' == p->buf[i])
                    236:                                break;
1.136     schwarze  237:                        if (' ' == p->buf[i]) {
                    238:                                while (' ' == p->buf[i]) {
                    239:                                        vbl++;
                    240:                                        i++;
                    241:                                }
1.71      kristaps  242:                                break;
1.136     schwarze  243:                        }
                    244:                        if (ASCII_NBRSP == p->buf[i]) {
                    245:                                vbl++;
                    246:                                continue;
                    247:                        }
1.130     kristaps  248:
1.136     schwarze  249:                        /*
                    250:                         * Now we definitely know there will be
                    251:                         * printable characters to output,
                    252:                         * so write preceding white space now.
                    253:                         */
                    254:                        if (vbl) {
1.146     kristaps  255:                                (*p->advance)(p, vbl);
1.139     schwarze  256:                                p->viscol += vbl;
1.136     schwarze  257:                                vbl = 0;
                    258:                        }
1.140     kristaps  259:
                    260:                        if (ASCII_HYPH == p->buf[i])
1.146     kristaps  261:                                (*p->letter)(p, '-');
1.140     kristaps  262:                        else
1.146     kristaps  263:                                (*p->letter)(p, p->buf[i]);
1.140     kristaps  264:
1.139     schwarze  265:                        p->viscol += 1;
1.136     schwarze  266:                }
                    267:                vend += vbl;
                    268:                vis = vend;
1.71      kristaps  269:        }
1.111     kristaps  270:
1.91      kristaps  271:        p->col = 0;
1.129     kristaps  272:        p->overstep = 0;
1.15      kristaps  273:
1.91      kristaps  274:        if ( ! (TERMP_NOBREAK & p->flags)) {
1.139     schwarze  275:                p->viscol = 0;
1.146     kristaps  276:                (*p->endline)(p);
1.15      kristaps  277:                return;
1.71      kristaps  278:        }
1.15      kristaps  279:
1.91      kristaps  280:        if (TERMP_HANG & p->flags) {
                    281:                /* We need one blank after the tag. */
1.129     kristaps  282:                p->overstep = /* LINTED */
1.92      kristaps  283:                        vis - maxvis + 1;
1.91      kristaps  284:
                    285:                /*
                    286:                 * Behave exactly the same way as groff:
1.92      kristaps  287:                 * If we have overstepped the margin, temporarily move
                    288:                 * it to the right and flag the rest of the line to be
                    289:                 * shorter.
1.91      kristaps  290:                 * If we landed right at the margin, be happy.
1.92      kristaps  291:                 * If we are one step before the margin, temporarily
                    292:                 * move it one step LEFT and flag the rest of the line
                    293:                 * to be longer.
1.91      kristaps  294:                 */
1.129     kristaps  295:                if (p->overstep >= -1) {
                    296:                        assert((int)maxvis + p->overstep >= 0);
1.92      kristaps  297:                        /* LINTED */
1.129     kristaps  298:                        maxvis += p->overstep;
1.92      kristaps  299:                } else
1.129     kristaps  300:                        p->overstep = 0;
1.91      kristaps  301:
                    302:        } else if (TERMP_DANGLE & p->flags)
                    303:                return;
1.15      kristaps  304:
1.92      kristaps  305:        /* Right-pad. */
                    306:        if (maxvis > vis + /* LINTED */
1.139     schwarze  307:                        ((TERMP_TWOSPACE & p->flags) ? 1 : 0)) {
                    308:                p->viscol += maxvis - vis;
1.146     kristaps  309:                (*p->advance)(p, maxvis - vis);
1.142     kristaps  310:                vis += (maxvis - vis);
1.139     schwarze  311:        } else {        /* ...or newline break. */
1.146     kristaps  312:                (*p->endline)(p);
1.139     schwarze  313:                p->viscol = p->rmargin;
1.146     kristaps  314:                (*p->advance)(p, p->rmargin);
1.91      kristaps  315:        }
1.15      kristaps  316: }
                    317:
                    318:
1.71      kristaps  319: /*
                    320:  * A newline only breaks an existing line; it won't assert vertical
                    321:  * space.  All data in the output buffer is flushed prior to the newline
                    322:  * assertion.
                    323:  */
                    324: void
                    325: term_newln(struct termp *p)
1.15      kristaps  326: {
                    327:
1.71      kristaps  328:        p->flags |= TERMP_NOSPACE;
1.139     schwarze  329:        if (0 == p->col && 0 == p->viscol) {
1.71      kristaps  330:                p->flags &= ~TERMP_NOLPAD;
1.15      kristaps  331:                return;
1.16      kristaps  332:        }
1.71      kristaps  333:        term_flushln(p);
                    334:        p->flags &= ~TERMP_NOLPAD;
1.16      kristaps  335: }
                    336:
                    337:
1.71      kristaps  338: /*
                    339:  * Asserts a vertical space (a full, empty line-break between lines).
                    340:  * Note that if used twice, this will cause two blank spaces and so on.
                    341:  * All data in the output buffer is flushed prior to the newline
                    342:  * assertion.
                    343:  */
                    344: void
                    345: term_vspace(struct termp *p)
1.16      kristaps  346: {
                    347:
1.62      kristaps  348:        term_newln(p);
1.139     schwarze  349:        p->viscol = 0;
1.146     kristaps  350:        (*p->endline)(p);
1.16      kristaps  351: }
                    352:
                    353:
1.71      kristaps  354: static void
1.125     kristaps  355: spec(struct termp *p, const char *word, size_t len)
1.17      kristaps  356: {
1.71      kristaps  357:        const char      *rhs;
                    358:        size_t           sz;
1.17      kristaps  359:
1.101     kristaps  360:        rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.125     kristaps  361:        if (rhs)
                    362:                encode(p, rhs, sz);
1.94      kristaps  363: }
                    364:
                    365:
                    366: static void
1.125     kristaps  367: res(struct termp *p, const char *word, size_t len)
1.94      kristaps  368: {
                    369:        const char      *rhs;
                    370:        size_t           sz;
                    371:
1.101     kristaps  372:        rhs = chars_a2res(p->symtab, word, len, &sz);
1.125     kristaps  373:        if (rhs)
                    374:                encode(p, rhs, sz);
                    375: }
                    376:
                    377:
                    378: void
                    379: term_fontlast(struct termp *p)
                    380: {
                    381:        enum termfont    f;
                    382:
                    383:        f = p->fontl;
                    384:        p->fontl = p->fontq[p->fonti];
                    385:        p->fontq[p->fonti] = f;
                    386: }
                    387:
                    388:
                    389: void
                    390: term_fontrepl(struct termp *p, enum termfont f)
                    391: {
                    392:
                    393:        p->fontl = p->fontq[p->fonti];
                    394:        p->fontq[p->fonti] = f;
                    395: }
                    396:
                    397:
                    398: void
                    399: term_fontpush(struct termp *p, enum termfont f)
                    400: {
                    401:
                    402:        assert(p->fonti + 1 < 10);
                    403:        p->fontl = p->fontq[p->fonti];
                    404:        p->fontq[++p->fonti] = f;
                    405: }
                    406:
                    407:
                    408: const void *
                    409: term_fontq(struct termp *p)
                    410: {
                    411:
                    412:        return(&p->fontq[p->fonti]);
                    413: }
                    414:
                    415:
                    416: enum termfont
                    417: term_fonttop(struct termp *p)
                    418: {
                    419:
                    420:        return(p->fontq[p->fonti]);
                    421: }
                    422:
                    423:
                    424: void
                    425: term_fontpopq(struct termp *p, const void *key)
                    426: {
                    427:
                    428:        while (p->fonti >= 0 && key != &p->fontq[p->fonti])
                    429:                p->fonti--;
                    430:        assert(p->fonti >= 0);
                    431: }
1.94      kristaps  432:
1.125     kristaps  433:
                    434: void
                    435: term_fontpop(struct termp *p)
                    436: {
                    437:
                    438:        assert(p->fonti);
                    439:        p->fonti--;
1.17      kristaps  440: }
                    441:
                    442:
1.71      kristaps  443: /*
                    444:  * Handle pwords, partial words, which may be either a single word or a
                    445:  * phrase that cannot be broken down (such as a literal string).  This
                    446:  * handles word styling.
                    447:  */
1.86      kristaps  448: void
                    449: term_word(struct termp *p, const char *word)
1.65      kristaps  450: {
1.124     kristaps  451:        const char      *sv, *seq;
1.125     kristaps  452:        int              sz;
1.124     kristaps  453:        size_t           ssz;
                    454:        enum roffdeco    deco;
1.71      kristaps  455:
1.100     kristaps  456:        sv = word;
                    457:
1.123     kristaps  458:        if (word[0] && '\0' == word[1])
1.100     kristaps  459:                switch (word[0]) {
                    460:                case('.'):
                    461:                        /* FALLTHROUGH */
                    462:                case(','):
                    463:                        /* FALLTHROUGH */
                    464:                case(';'):
                    465:                        /* FALLTHROUGH */
                    466:                case(':'):
                    467:                        /* FALLTHROUGH */
                    468:                case('?'):
                    469:                        /* FALLTHROUGH */
                    470:                case('!'):
                    471:                        /* FALLTHROUGH */
                    472:                case(')'):
                    473:                        /* FALLTHROUGH */
                    474:                case(']'):
                    475:                        if ( ! (TERMP_IGNDELIM & p->flags))
                    476:                                p->flags |= TERMP_NOSPACE;
                    477:                        break;
                    478:                default:
                    479:                        break;
                    480:                }
1.65      kristaps  481:
1.133     kristaps  482:        if ( ! (TERMP_NOSPACE & p->flags)) {
1.125     kristaps  483:                bufferc(p, ' ');
1.133     kristaps  484:                if (TERMP_SENTENCE & p->flags)
                    485:                        bufferc(p, ' ');
                    486:        }
1.65      kristaps  487:
1.71      kristaps  488:        if ( ! (p->flags & TERMP_NONOSPACE))
                    489:                p->flags &= ~TERMP_NOSPACE;
1.133     kristaps  490:
                    491:        p->flags &= ~TERMP_SENTENCE;
1.65      kristaps  492:
1.125     kristaps  493:        /* FIXME: use strcspn. */
1.124     kristaps  494:
                    495:        while (*word) {
                    496:                if ('\\' != *word) {
1.125     kristaps  497:                        encode(p, word, 1);
1.124     kristaps  498:                        word++;
                    499:                        continue;
                    500:                }
                    501:
                    502:                seq = ++word;
                    503:                sz = a2roffdeco(&deco, &seq, &ssz);
                    504:
                    505:                switch (deco) {
                    506:                case (DECO_RESERVED):
1.125     kristaps  507:                        res(p, seq, ssz);
1.124     kristaps  508:                        break;
                    509:                case (DECO_SPECIAL):
1.125     kristaps  510:                        spec(p, seq, ssz);
1.124     kristaps  511:                        break;
                    512:                case (DECO_BOLD):
1.125     kristaps  513:                        term_fontrepl(p, TERMFONT_BOLD);
1.124     kristaps  514:                        break;
                    515:                case (DECO_ITALIC):
1.125     kristaps  516:                        term_fontrepl(p, TERMFONT_UNDER);
1.124     kristaps  517:                        break;
                    518:                case (DECO_ROMAN):
1.125     kristaps  519:                        term_fontrepl(p, TERMFONT_NONE);
1.124     kristaps  520:                        break;
                    521:                case (DECO_PREVIOUS):
1.125     kristaps  522:                        term_fontlast(p);
1.124     kristaps  523:                        break;
                    524:                default:
                    525:                        break;
                    526:                }
1.127     kristaps  527:
1.124     kristaps  528:                word += sz;
1.127     kristaps  529:                if (DECO_NOSPACE == deco && '\0' == *word)
                    530:                        p->flags |= TERMP_NOSPACE;
1.124     kristaps  531:        }
1.65      kristaps  532:
1.131     kristaps  533:        /*
                    534:         * Note that we don't process the pipe: the parser sees it as
                    535:         * punctuation, but we don't in terms of typography.
                    536:         */
1.100     kristaps  537:        if (sv[0] && 0 == sv[1])
                    538:                switch (sv[0]) {
                    539:                case('('):
                    540:                        /* FALLTHROUGH */
                    541:                case('['):
                    542:                        p->flags |= TERMP_NOSPACE;
                    543:                        break;
                    544:                default:
                    545:                        break;
                    546:                }
1.65      kristaps  547: }
                    548:
                    549:
1.71      kristaps  550: static void
1.125     kristaps  551: adjbuf(struct termp *p, size_t sz)
1.51      kristaps  552: {
                    553:
1.125     kristaps  554:        if (0 == p->maxcols)
                    555:                p->maxcols = 1024;
                    556:        while (sz >= p->maxcols)
                    557:                p->maxcols <<= 2;
                    558:
                    559:        p->buf = realloc(p->buf, p->maxcols);
                    560:        if (NULL == p->buf) {
                    561:                perror(NULL);
                    562:                exit(EXIT_FAILURE);
1.71      kristaps  563:        }
1.51      kristaps  564: }
                    565:
1.79      kristaps  566:
                    567: static void
1.125     kristaps  568: buffera(struct termp *p, const char *word, size_t sz)
1.79      kristaps  569: {
1.125     kristaps  570:
                    571:        if (p->col + sz >= p->maxcols)
                    572:                adjbuf(p, p->col + sz);
                    573:
1.126     kristaps  574:        memcpy(&p->buf[(int)p->col], word, sz);
1.125     kristaps  575:        p->col += sz;
                    576: }
                    577:
                    578:
                    579: static void
                    580: bufferc(struct termp *p, char c)
                    581: {
                    582:
                    583:        if (p->col + 1 >= p->maxcols)
                    584:                adjbuf(p, p->col + 1);
                    585:
1.126     kristaps  586:        p->buf[(int)p->col++] = c;
1.125     kristaps  587: }
                    588:
                    589:
                    590: static void
                    591: encode(struct termp *p, const char *word, size_t sz)
                    592: {
                    593:        enum termfont     f;
                    594:        int               i;
                    595:
                    596:        /*
                    597:         * Encode and buffer a string of characters.  If the current
                    598:         * font mode is unset, buffer directly, else encode then buffer
                    599:         * character by character.
                    600:         */
                    601:
1.147     kristaps  602:        if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.125     kristaps  603:                buffera(p, word, sz);
                    604:                return;
                    605:        }
                    606:
                    607:        for (i = 0; i < (int)sz; i++) {
                    608:                if ( ! isgraph((u_char)word[i])) {
                    609:                        bufferc(p, word[i]);
                    610:                        continue;
1.79      kristaps  611:                }
1.125     kristaps  612:
                    613:                if (TERMFONT_UNDER == f)
                    614:                        bufferc(p, '_');
                    615:                else
                    616:                        bufferc(p, word[i]);
                    617:
                    618:                bufferc(p, 8);
                    619:                bufferc(p, word[i]);
1.79      kristaps  620:        }
                    621: }
1.106     kristaps  622:
                    623:
1.107     kristaps  624: size_t
1.149     kristaps  625: term_len(const struct termp *p, size_t sz)
                    626: {
                    627:
                    628:        return((*p->width)(p, ' ') * sz);
                    629: }
                    630:
                    631:
                    632: size_t
                    633: term_strlen(const struct termp *p, const char *cp)
                    634: {
                    635:        size_t           sz;
                    636:
                    637:        for (sz = 0; *cp; cp++)
                    638:                sz += (*p->width)(p, *cp);
                    639:
                    640:        return(sz);
                    641: }
                    642:
                    643:
                    644: size_t
                    645: term_vspan(const struct termp *p, const struct roffsu *su)
1.106     kristaps  646: {
                    647:        double           r;
                    648:
1.107     kristaps  649:        switch (su->unit) {
1.106     kristaps  650:        case (SCALE_CM):
1.107     kristaps  651:                r = su->scale * 2;
1.106     kristaps  652:                break;
                    653:        case (SCALE_IN):
1.107     kristaps  654:                r = su->scale * 6;
1.106     kristaps  655:                break;
                    656:        case (SCALE_PC):
1.107     kristaps  657:                r = su->scale;
1.106     kristaps  658:                break;
                    659:        case (SCALE_PT):
1.107     kristaps  660:                r = su->scale / 8;
1.106     kristaps  661:                break;
                    662:        case (SCALE_MM):
1.107     kristaps  663:                r = su->scale / 1000;
1.106     kristaps  664:                break;
                    665:        case (SCALE_VS):
1.107     kristaps  666:                r = su->scale;
1.106     kristaps  667:                break;
                    668:        default:
1.107     kristaps  669:                r = su->scale - 1;
1.106     kristaps  670:                break;
                    671:        }
                    672:
                    673:        if (r < 0.0)
                    674:                r = 0.0;
1.107     kristaps  675:        return(/* LINTED */(size_t)
1.106     kristaps  676:                        r);
                    677: }
                    678:
                    679:
1.107     kristaps  680: size_t
1.149     kristaps  681: term_hspan(const struct termp *p, const struct roffsu *su)
1.106     kristaps  682: {
                    683:        double           r;
                    684:
1.108     kristaps  685:        /* XXX: CM, IN, and PT are approximations. */
                    686:
1.107     kristaps  687:        switch (su->unit) {
1.106     kristaps  688:        case (SCALE_CM):
1.108     kristaps  689:                r = 4 * su->scale;
1.106     kristaps  690:                break;
                    691:        case (SCALE_IN):
1.108     kristaps  692:                /* XXX: this is an approximation. */
                    693:                r = 10 * su->scale;
1.106     kristaps  694:                break;
                    695:        case (SCALE_PC):
1.108     kristaps  696:                r = (10 * su->scale) / 6;
1.106     kristaps  697:                break;
                    698:        case (SCALE_PT):
1.108     kristaps  699:                r = (10 * su->scale) / 72;
1.106     kristaps  700:                break;
                    701:        case (SCALE_MM):
1.107     kristaps  702:                r = su->scale / 1000; /* FIXME: double-check. */
1.106     kristaps  703:                break;
                    704:        case (SCALE_VS):
1.107     kristaps  705:                r = su->scale * 2 - 1; /* FIXME: double-check. */
1.106     kristaps  706:                break;
                    707:        default:
1.107     kristaps  708:                r = su->scale;
1.106     kristaps  709:                break;
                    710:        }
                    711:
                    712:        if (r < 0.0)
                    713:                r = 0.0;
1.107     kristaps  714:        return((size_t)/* LINTED */
1.106     kristaps  715:                        r);
                    716: }
                    717:
                    718:

CVSweb