Annotation of mandoc/term.c, Revision 1.173
1.173 ! schwarze 1: /* $Id: term.c,v 1.172 2010/09/23 20:26:00 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:
1.163 kristaps 37: static void spec(struct termp *, enum roffdeco,
38: const char *, size_t);
1.125 kristaps 39: static void res(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);
1.170 kristaps 86: exit((int)MANDOCLEVEL_SYSERR);
1.117 kristaps 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 */
1.172 schwarze 137: size_t dv; /* temporary for visual pos calculations */
1.152 kristaps 138: int j; /* temporary loop index for p->buf */
139: int jhy; /* last hyph before overflow w/r/t j */
140: size_t maxvis; /* output position of visible boundary */
141: size_t mmax; /* used in calculating bp */
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:
1.154 kristaps 166: vis = vend = i = 0;
1.115 kristaps 167:
1.136 schwarze 168: while (i < (int)p->col) {
1.71 kristaps 169: /*
1.154 kristaps 170: * Handle literal tab characters: collapse all
171: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 172: */
1.169 schwarze 173: while (i < (int)p->col && '\t' == p->buf[i]) {
1.154 kristaps 174: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 175: vbl += vend - vis;
176: vis = vend;
1.169 schwarze 177: i++;
1.138 schwarze 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 */
1.169 schwarze 188: for (j = i, 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: }
1.138 schwarze 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]) {
1.164 kristaps 238: j = i;
239: while (' ' == p->buf[i])
1.136 schwarze 240: i++;
1.172 schwarze 241: dv = (i - j) * (*p->width)(p, ' ');
242: vbl += dv;
243: vend += dv;
1.71 kristaps 244: break;
1.136 schwarze 245: }
246: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 247: vbl += (*p->width)(p, ' ');
1.136 schwarze 248: continue;
249: }
1.130 kristaps 250:
1.136 schwarze 251: /*
252: * Now we definitely know there will be
253: * printable characters to output,
254: * so write preceding white space now.
255: */
256: if (vbl) {
1.146 kristaps 257: (*p->advance)(p, vbl);
1.139 schwarze 258: p->viscol += vbl;
1.136 schwarze 259: vbl = 0;
260: }
1.140 kristaps 261:
1.153 kristaps 262: if (ASCII_HYPH == p->buf[i]) {
1.146 kristaps 263: (*p->letter)(p, '-');
1.153 kristaps 264: p->viscol += (*p->width)(p, '-');
265: } else {
1.146 kristaps 266: (*p->letter)(p, p->buf[i]);
1.153 kristaps 267: p->viscol += (*p->width)(p, p->buf[i]);
268: }
1.136 schwarze 269: }
270: vis = vend;
1.71 kristaps 271: }
1.168 schwarze 272:
273: /*
274: * If there was trailing white space, it was not printed;
275: * so reset the cursor position accordingly.
276: */
277: vis -= vbl;
1.111 kristaps 278:
1.91 kristaps 279: p->col = 0;
1.129 kristaps 280: p->overstep = 0;
1.15 kristaps 281:
1.91 kristaps 282: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 283: p->viscol = 0;
1.146 kristaps 284: (*p->endline)(p);
1.15 kristaps 285: return;
1.71 kristaps 286: }
1.15 kristaps 287:
1.91 kristaps 288: if (TERMP_HANG & p->flags) {
289: /* We need one blank after the tag. */
1.129 kristaps 290: p->overstep = /* LINTED */
1.153 kristaps 291: vis - maxvis + (*p->width)(p, ' ');
1.91 kristaps 292:
293: /*
294: * Behave exactly the same way as groff:
1.92 kristaps 295: * If we have overstepped the margin, temporarily move
296: * it to the right and flag the rest of the line to be
297: * shorter.
1.91 kristaps 298: * If we landed right at the margin, be happy.
1.92 kristaps 299: * If we are one step before the margin, temporarily
300: * move it one step LEFT and flag the rest of the line
301: * to be longer.
1.91 kristaps 302: */
1.129 kristaps 303: if (p->overstep >= -1) {
304: assert((int)maxvis + p->overstep >= 0);
1.92 kristaps 305: /* LINTED */
1.129 kristaps 306: maxvis += p->overstep;
1.92 kristaps 307: } else
1.129 kristaps 308: p->overstep = 0;
1.91 kristaps 309:
310: } else if (TERMP_DANGLE & p->flags)
311: return;
1.15 kristaps 312:
1.92 kristaps 313: /* Right-pad. */
314: if (maxvis > vis + /* LINTED */
1.154 kristaps 315: ((TERMP_TWOSPACE & p->flags) ?
316: (*p->width)(p, ' ') : 0)) {
1.139 schwarze 317: p->viscol += maxvis - vis;
1.146 kristaps 318: (*p->advance)(p, maxvis - vis);
1.142 kristaps 319: vis += (maxvis - vis);
1.139 schwarze 320: } else { /* ...or newline break. */
1.146 kristaps 321: (*p->endline)(p);
1.139 schwarze 322: p->viscol = p->rmargin;
1.146 kristaps 323: (*p->advance)(p, p->rmargin);
1.91 kristaps 324: }
1.15 kristaps 325: }
326:
327:
1.71 kristaps 328: /*
329: * A newline only breaks an existing line; it won't assert vertical
330: * space. All data in the output buffer is flushed prior to the newline
331: * assertion.
332: */
333: void
334: term_newln(struct termp *p)
1.15 kristaps 335: {
336:
1.71 kristaps 337: p->flags |= TERMP_NOSPACE;
1.139 schwarze 338: if (0 == p->col && 0 == p->viscol) {
1.71 kristaps 339: p->flags &= ~TERMP_NOLPAD;
1.15 kristaps 340: return;
1.16 kristaps 341: }
1.71 kristaps 342: term_flushln(p);
343: p->flags &= ~TERMP_NOLPAD;
1.16 kristaps 344: }
345:
346:
1.71 kristaps 347: /*
348: * Asserts a vertical space (a full, empty line-break between lines).
349: * Note that if used twice, this will cause two blank spaces and so on.
350: * All data in the output buffer is flushed prior to the newline
351: * assertion.
352: */
353: void
354: term_vspace(struct termp *p)
1.16 kristaps 355: {
356:
1.62 kristaps 357: term_newln(p);
1.139 schwarze 358: p->viscol = 0;
1.146 kristaps 359: (*p->endline)(p);
1.16 kristaps 360: }
361:
362:
1.71 kristaps 363: static void
1.163 kristaps 364: spec(struct termp *p, enum roffdeco d, const char *word, size_t len)
1.17 kristaps 365: {
1.71 kristaps 366: const char *rhs;
367: size_t sz;
1.17 kristaps 368:
1.161 kristaps 369: rhs = chars_spec2str(p->symtab, word, len, &sz);
1.125 kristaps 370: if (rhs)
371: encode(p, rhs, sz);
1.163 kristaps 372: else if (DECO_SSPECIAL == d)
373: encode(p, word, len);
1.94 kristaps 374: }
375:
376:
377: static void
1.125 kristaps 378: res(struct termp *p, const char *word, size_t len)
1.94 kristaps 379: {
380: const char *rhs;
381: size_t sz;
382:
1.161 kristaps 383: rhs = chars_res2str(p->symtab, word, len, &sz);
1.125 kristaps 384: if (rhs)
385: encode(p, rhs, sz);
386: }
387:
388:
389: void
390: term_fontlast(struct termp *p)
391: {
392: enum termfont f;
393:
394: f = p->fontl;
395: p->fontl = p->fontq[p->fonti];
396: p->fontq[p->fonti] = f;
397: }
398:
399:
400: void
401: term_fontrepl(struct termp *p, enum termfont f)
402: {
403:
404: p->fontl = p->fontq[p->fonti];
405: p->fontq[p->fonti] = f;
406: }
407:
408:
409: void
410: term_fontpush(struct termp *p, enum termfont f)
411: {
412:
413: assert(p->fonti + 1 < 10);
414: p->fontl = p->fontq[p->fonti];
415: p->fontq[++p->fonti] = f;
416: }
417:
418:
419: const void *
420: term_fontq(struct termp *p)
421: {
422:
423: return(&p->fontq[p->fonti]);
424: }
425:
426:
427: enum termfont
428: term_fonttop(struct termp *p)
429: {
430:
431: return(p->fontq[p->fonti]);
432: }
433:
434:
435: void
436: term_fontpopq(struct termp *p, const void *key)
437: {
438:
439: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
440: p->fonti--;
441: assert(p->fonti >= 0);
442: }
1.94 kristaps 443:
1.125 kristaps 444:
445: void
446: term_fontpop(struct termp *p)
447: {
448:
449: assert(p->fonti);
450: p->fonti--;
1.17 kristaps 451: }
452:
453:
1.71 kristaps 454: /*
455: * Handle pwords, partial words, which may be either a single word or a
456: * phrase that cannot be broken down (such as a literal string). This
457: * handles word styling.
458: */
1.86 kristaps 459: void
460: term_word(struct termp *p, const char *word)
1.65 kristaps 461: {
1.124 kristaps 462: const char *sv, *seq;
463: size_t ssz;
464: enum roffdeco deco;
1.71 kristaps 465:
1.100 kristaps 466: sv = word;
467:
1.123 kristaps 468: if (word[0] && '\0' == word[1])
1.100 kristaps 469: switch (word[0]) {
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: /* FALLTHROUGH */
484: case(']'):
485: if ( ! (TERMP_IGNDELIM & p->flags))
486: p->flags |= TERMP_NOSPACE;
487: break;
488: default:
489: break;
490: }
1.65 kristaps 491:
1.133 kristaps 492: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 493: if ( ! (TERMP_KEEP & p->flags)) {
494: if (TERMP_PREKEEP & p->flags)
495: p->flags |= TERMP_KEEP;
1.133 kristaps 496: bufferc(p, ' ');
1.151 schwarze 497: if (TERMP_SENTENCE & p->flags)
498: bufferc(p, ' ');
499: } else
500: bufferc(p, ASCII_NBRSP);
1.133 kristaps 501: }
1.65 kristaps 502:
1.71 kristaps 503: if ( ! (p->flags & TERMP_NONOSPACE))
504: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 505: else
506: p->flags |= TERMP_NOSPACE;
1.133 kristaps 507:
1.173 ! schwarze 508: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
1.65 kristaps 509:
1.162 kristaps 510: while (*word) {
511: if ((ssz = strcspn(word, "\\")) > 0)
512: encode(p, word, ssz);
1.124 kristaps 513:
1.162 kristaps 514: word += ssz;
515: if ('\\' != *word)
1.124 kristaps 516: continue;
517:
518: seq = ++word;
1.171 kristaps 519: word += a2roffdeco(&deco, &seq, &ssz);
1.124 kristaps 520:
521: switch (deco) {
522: case (DECO_RESERVED):
1.125 kristaps 523: res(p, seq, ssz);
1.124 kristaps 524: break;
525: case (DECO_SPECIAL):
1.163 kristaps 526: /* FALLTHROUGH */
527: case (DECO_SSPECIAL):
528: spec(p, deco, seq, ssz);
1.124 kristaps 529: break;
530: case (DECO_BOLD):
1.125 kristaps 531: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 532: break;
533: case (DECO_ITALIC):
1.125 kristaps 534: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 535: break;
536: case (DECO_ROMAN):
1.125 kristaps 537: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 538: break;
539: case (DECO_PREVIOUS):
1.125 kristaps 540: term_fontlast(p);
1.124 kristaps 541: break;
542: default:
543: break;
544: }
1.127 kristaps 545:
546: if (DECO_NOSPACE == deco && '\0' == *word)
547: p->flags |= TERMP_NOSPACE;
1.124 kristaps 548: }
1.65 kristaps 549:
1.131 kristaps 550: /*
551: * Note that we don't process the pipe: the parser sees it as
552: * punctuation, but we don't in terms of typography.
553: */
1.162 kristaps 554: if (sv[0] && '\0' == sv[1])
1.100 kristaps 555: switch (sv[0]) {
556: case('('):
557: /* FALLTHROUGH */
558: case('['):
559: p->flags |= TERMP_NOSPACE;
560: break;
561: default:
562: break;
563: }
1.65 kristaps 564: }
565:
566:
1.71 kristaps 567: static void
1.125 kristaps 568: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 569: {
570:
1.125 kristaps 571: if (0 == p->maxcols)
572: p->maxcols = 1024;
573: while (sz >= p->maxcols)
574: p->maxcols <<= 2;
575:
576: p->buf = realloc(p->buf, p->maxcols);
577: if (NULL == p->buf) {
578: perror(NULL);
1.170 kristaps 579: exit((int)MANDOCLEVEL_SYSERR);
1.71 kristaps 580: }
1.51 kristaps 581: }
582:
1.79 kristaps 583:
584: static void
1.125 kristaps 585: bufferc(struct termp *p, char c)
586: {
587:
588: if (p->col + 1 >= p->maxcols)
589: adjbuf(p, p->col + 1);
590:
1.126 kristaps 591: p->buf[(int)p->col++] = c;
1.125 kristaps 592: }
593:
594:
595: static void
596: encode(struct termp *p, const char *word, size_t sz)
597: {
598: enum termfont f;
599: int i;
600:
601: /*
602: * Encode and buffer a string of characters. If the current
603: * font mode is unset, buffer directly, else encode then buffer
604: * character by character.
605: */
606:
1.147 kristaps 607: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.165 kristaps 608: if (p->col + sz >= p->maxcols)
609: adjbuf(p, p->col + sz);
610: memcpy(&p->buf[(int)p->col], word, sz);
611: p->col += sz;
1.125 kristaps 612: return;
613: }
614:
1.165 kristaps 615: /* Pre-buffer, assuming worst-case. */
616:
617: if (p->col + 1 + (sz * 3) >= p->maxcols)
618: adjbuf(p, p->col + 1 + (sz * 3));
619:
1.125 kristaps 620: for (i = 0; i < (int)sz; i++) {
621: if ( ! isgraph((u_char)word[i])) {
1.165 kristaps 622: p->buf[(int)p->col++] = word[i];
1.125 kristaps 623: continue;
1.79 kristaps 624: }
1.125 kristaps 625:
626: if (TERMFONT_UNDER == f)
1.165 kristaps 627: p->buf[(int)p->col++] = '_';
1.125 kristaps 628: else
1.165 kristaps 629: p->buf[(int)p->col++] = word[i];
1.125 kristaps 630:
1.165 kristaps 631: p->buf[(int)p->col++] = 8;
632: p->buf[(int)p->col++] = 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: {
1.171 kristaps 648: size_t sz, ssz, rsz, i;
649: enum roffdeco d;
650: const char *seq, *rhs;
651:
652: for (sz = 0; '\0' != *cp; )
653: /*
654: * Account for escaped sequences within string length
655: * calculations. This follows the logic in term_word()
656: * as we must calculate the width of produced strings.
657: */
658: if ('\\' == *cp) {
659: seq = ++cp;
660: cp += a2roffdeco(&d, &seq, &ssz);
661:
662: switch (d) {
663: case (DECO_RESERVED):
664: rhs = chars_res2str
665: (p->symtab, seq, ssz, &rsz);
666: break;
667: case (DECO_SPECIAL):
668: /* FALLTHROUGH */
669: case (DECO_SSPECIAL):
670: rhs = chars_spec2str
671: (p->symtab, seq, ssz, &rsz);
672:
673: /* Allow for one-char escapes. */
674: if (DECO_SSPECIAL != d || rhs)
675: break;
676:
677: rhs = seq;
678: rsz = ssz;
679: break;
680: default:
681: rhs = NULL;
682: break;
683: }
1.149 kristaps 684:
1.171 kristaps 685: if (rhs)
686: for (i = 0; i < rsz; i++)
687: sz += (*p->width)(p, *rhs++);
688: } else
689: sz += (*p->width)(p, *cp++);
1.149 kristaps 690:
691: return(sz);
692: }
693:
694:
1.157 kristaps 695: /* ARGSUSED */
1.149 kristaps 696: size_t
697: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 698: {
699: double r;
700:
1.107 kristaps 701: switch (su->unit) {
1.106 kristaps 702: case (SCALE_CM):
1.107 kristaps 703: r = su->scale * 2;
1.106 kristaps 704: break;
705: case (SCALE_IN):
1.107 kristaps 706: r = su->scale * 6;
1.106 kristaps 707: break;
708: case (SCALE_PC):
1.107 kristaps 709: r = su->scale;
1.106 kristaps 710: break;
711: case (SCALE_PT):
1.107 kristaps 712: r = su->scale / 8;
1.106 kristaps 713: break;
714: case (SCALE_MM):
1.107 kristaps 715: r = su->scale / 1000;
1.106 kristaps 716: break;
717: case (SCALE_VS):
1.107 kristaps 718: r = su->scale;
1.106 kristaps 719: break;
720: default:
1.107 kristaps 721: r = su->scale - 1;
1.106 kristaps 722: break;
723: }
724:
725: if (r < 0.0)
726: r = 0.0;
1.107 kristaps 727: return(/* LINTED */(size_t)
1.106 kristaps 728: r);
729: }
730:
731:
1.107 kristaps 732: size_t
1.149 kristaps 733: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 734: {
1.156 kristaps 735: double v;
1.108 kristaps 736:
1.156 kristaps 737: v = ((*p->hspan)(p, su));
738: if (v < 0.0)
739: v = 0.0;
740: return((size_t) /* LINTED */
741: v);
1.106 kristaps 742: }
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