Annotation of mandoc/term.c, Revision 1.152
1.152 ! kristaps 1: /* $Id: term.c,v 1.151 2010/06/27 01:26:20 schwarze 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 */
1.152 ! kristaps 136: int j; /* temporary loop index for p->buf */
! 137: int jhy; /* last hyph before overflow w/r/t j */
! 138: size_t maxvis; /* output position of visible boundary */
! 139: size_t mmax; /* used in calculating bp */
1.53 kristaps 140:
1.71 kristaps 141: /*
142: * First, establish the maximum columns of "visible" content.
143: * This is usually the difference between the right-margin and
144: * an indentation, but can be, for tagged lists or columns, a
1.115 kristaps 145: * small set of values.
1.71 kristaps 146: */
1.53 kristaps 147:
1.71 kristaps 148: assert(p->offset < p->rmargin);
1.92 kristaps 149:
1.129 kristaps 150: maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
1.119 kristaps 151: /* LINTED */
1.129 kristaps 152: 0 : p->rmargin - p->offset - p->overstep;
153: mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
1.119 kristaps 154: /* LINTED */
1.129 kristaps 155: 0 : p->maxrmargin - p->offset - p->overstep;
1.92 kristaps 156:
1.71 kristaps 157: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 158:
1.136 schwarze 159: /*
160: * Indent the first line of a paragraph.
161: */
162: vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
163:
1.115 kristaps 164: /*
165: * FIXME: if bp is zero, we still output the first word before
166: * breaking the line.
167: */
168:
1.136 schwarze 169: vis = vend = i = 0;
170: while (i < (int)p->col) {
1.71 kristaps 171:
172: /*
1.138 schwarze 173: * Handle literal tab characters.
174: */
175: for (j = i; j < (int)p->col; j++) {
176: if ('\t' != p->buf[j])
177: break;
178: vend = (vis/p->tabwidth+1)*p->tabwidth;
179: vbl += vend - vis;
180: vis = vend;
181: }
182:
183: /*
1.71 kristaps 184: * Count up visible word characters. Control sequences
185: * (starting with the CSI) aren't counted. A space
186: * generates a non-printing word, which is valid (the
187: * space is printed according to regular spacing rules).
188: */
189:
190: /* LINTED */
1.140 kristaps 191: for (jhy = 0; j < (int)p->col; j++) {
1.138 schwarze 192: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71 kristaps 193: break;
1.140 kristaps 194: if (8 != p->buf[j]) {
195: if (vend > vis && vend < bp &&
196: ASCII_HYPH == p->buf[j])
197: jhy = j;
198: vend++;
199: } else
1.136 schwarze 200: vend--;
1.71 kristaps 201: }
1.53 kristaps 202:
1.71 kristaps 203: /*
1.81 kristaps 204: * Find out whether we would exceed the right margin.
1.136 schwarze 205: * If so, break to the next line.
1.81 kristaps 206: */
1.140 kristaps 207: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 208: vend -= vis;
1.146 kristaps 209: (*p->endline)(p);
1.81 kristaps 210: if (TERMP_NOBREAK & p->flags) {
1.139 schwarze 211: p->viscol = p->rmargin;
1.146 kristaps 212: (*p->advance)(p, p->rmargin);
1.136 schwarze 213: vend += p->rmargin - p->offset;
1.81 kristaps 214: } else {
1.139 schwarze 215: p->viscol = 0;
1.136 schwarze 216: vbl = p->offset;
1.81 kristaps 217: }
1.130 kristaps 218:
1.129 kristaps 219: /* Remove the p->overstep width. */
1.130 kristaps 220:
1.112 kristaps 221: bp += (int)/* LINTED */
1.129 kristaps 222: p->overstep;
223: p->overstep = 0;
1.71 kristaps 224: }
1.53 kristaps 225:
1.138 schwarze 226: /*
227: * Skip leading tabs, they were handled above.
228: */
229: while (i < (int)p->col && '\t' == p->buf[i])
230: i++;
231:
1.130 kristaps 232: /* Write out the [remaining] word. */
1.136 schwarze 233: for ( ; i < (int)p->col; i++) {
1.140 kristaps 234: if (vend > bp && jhy > 0 && i > jhy)
235: break;
1.138 schwarze 236: if ('\t' == p->buf[i])
237: break;
1.136 schwarze 238: if (' ' == p->buf[i]) {
239: while (' ' == p->buf[i]) {
240: vbl++;
241: i++;
242: }
1.71 kristaps 243: break;
1.136 schwarze 244: }
245: if (ASCII_NBRSP == p->buf[i]) {
246: vbl++;
247: continue;
248: }
1.130 kristaps 249:
1.136 schwarze 250: /*
251: * Now we definitely know there will be
252: * printable characters to output,
253: * so write preceding white space now.
254: */
255: if (vbl) {
1.146 kristaps 256: (*p->advance)(p, vbl);
1.139 schwarze 257: p->viscol += vbl;
1.136 schwarze 258: vbl = 0;
259: }
1.140 kristaps 260:
261: if (ASCII_HYPH == p->buf[i])
1.146 kristaps 262: (*p->letter)(p, '-');
1.140 kristaps 263: else
1.146 kristaps 264: (*p->letter)(p, p->buf[i]);
1.140 kristaps 265:
1.139 schwarze 266: p->viscol += 1;
1.136 schwarze 267: }
268: vend += vbl;
269: vis = vend;
1.71 kristaps 270: }
1.111 kristaps 271:
1.91 kristaps 272: p->col = 0;
1.129 kristaps 273: p->overstep = 0;
1.15 kristaps 274:
1.91 kristaps 275: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 276: p->viscol = 0;
1.146 kristaps 277: (*p->endline)(p);
1.15 kristaps 278: return;
1.71 kristaps 279: }
1.15 kristaps 280:
1.91 kristaps 281: if (TERMP_HANG & p->flags) {
282: /* We need one blank after the tag. */
1.129 kristaps 283: p->overstep = /* LINTED */
1.92 kristaps 284: vis - maxvis + 1;
1.91 kristaps 285:
286: /*
287: * Behave exactly the same way as groff:
1.92 kristaps 288: * If we have overstepped the margin, temporarily move
289: * it to the right and flag the rest of the line to be
290: * shorter.
1.91 kristaps 291: * If we landed right at the margin, be happy.
1.92 kristaps 292: * If we are one step before the margin, temporarily
293: * move it one step LEFT and flag the rest of the line
294: * to be longer.
1.91 kristaps 295: */
1.129 kristaps 296: if (p->overstep >= -1) {
297: assert((int)maxvis + p->overstep >= 0);
1.92 kristaps 298: /* LINTED */
1.129 kristaps 299: maxvis += p->overstep;
1.92 kristaps 300: } else
1.129 kristaps 301: p->overstep = 0;
1.91 kristaps 302:
303: } else if (TERMP_DANGLE & p->flags)
304: return;
1.15 kristaps 305:
1.92 kristaps 306: /* Right-pad. */
307: if (maxvis > vis + /* LINTED */
1.139 schwarze 308: ((TERMP_TWOSPACE & p->flags) ? 1 : 0)) {
309: p->viscol += maxvis - vis;
1.146 kristaps 310: (*p->advance)(p, maxvis - vis);
1.142 kristaps 311: vis += (maxvis - vis);
1.139 schwarze 312: } else { /* ...or newline break. */
1.146 kristaps 313: (*p->endline)(p);
1.139 schwarze 314: p->viscol = p->rmargin;
1.146 kristaps 315: (*p->advance)(p, p->rmargin);
1.91 kristaps 316: }
1.15 kristaps 317: }
318:
319:
1.71 kristaps 320: /*
321: * A newline only breaks an existing line; it won't assert vertical
322: * space. All data in the output buffer is flushed prior to the newline
323: * assertion.
324: */
325: void
326: term_newln(struct termp *p)
1.15 kristaps 327: {
328:
1.71 kristaps 329: p->flags |= TERMP_NOSPACE;
1.139 schwarze 330: if (0 == p->col && 0 == p->viscol) {
1.71 kristaps 331: p->flags &= ~TERMP_NOLPAD;
1.15 kristaps 332: return;
1.16 kristaps 333: }
1.71 kristaps 334: term_flushln(p);
335: p->flags &= ~TERMP_NOLPAD;
1.16 kristaps 336: }
337:
338:
1.71 kristaps 339: /*
340: * Asserts a vertical space (a full, empty line-break between lines).
341: * Note that if used twice, this will cause two blank spaces and so on.
342: * All data in the output buffer is flushed prior to the newline
343: * assertion.
344: */
345: void
346: term_vspace(struct termp *p)
1.16 kristaps 347: {
348:
1.62 kristaps 349: term_newln(p);
1.139 schwarze 350: p->viscol = 0;
1.146 kristaps 351: (*p->endline)(p);
1.16 kristaps 352: }
353:
354:
1.71 kristaps 355: static void
1.125 kristaps 356: spec(struct termp *p, const char *word, size_t len)
1.17 kristaps 357: {
1.71 kristaps 358: const char *rhs;
359: size_t sz;
1.17 kristaps 360:
1.101 kristaps 361: rhs = chars_a2ascii(p->symtab, word, len, &sz);
1.125 kristaps 362: if (rhs)
363: encode(p, rhs, sz);
1.94 kristaps 364: }
365:
366:
367: static void
1.125 kristaps 368: res(struct termp *p, const char *word, size_t len)
1.94 kristaps 369: {
370: const char *rhs;
371: size_t sz;
372:
1.101 kristaps 373: rhs = chars_a2res(p->symtab, word, len, &sz);
1.125 kristaps 374: if (rhs)
375: encode(p, rhs, sz);
376: }
377:
378:
379: void
380: term_fontlast(struct termp *p)
381: {
382: enum termfont f;
383:
384: f = p->fontl;
385: p->fontl = p->fontq[p->fonti];
386: p->fontq[p->fonti] = f;
387: }
388:
389:
390: void
391: term_fontrepl(struct termp *p, enum termfont f)
392: {
393:
394: p->fontl = p->fontq[p->fonti];
395: p->fontq[p->fonti] = f;
396: }
397:
398:
399: void
400: term_fontpush(struct termp *p, enum termfont f)
401: {
402:
403: assert(p->fonti + 1 < 10);
404: p->fontl = p->fontq[p->fonti];
405: p->fontq[++p->fonti] = f;
406: }
407:
408:
409: const void *
410: term_fontq(struct termp *p)
411: {
412:
413: return(&p->fontq[p->fonti]);
414: }
415:
416:
417: enum termfont
418: term_fonttop(struct termp *p)
419: {
420:
421: return(p->fontq[p->fonti]);
422: }
423:
424:
425: void
426: term_fontpopq(struct termp *p, const void *key)
427: {
428:
429: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
430: p->fonti--;
431: assert(p->fonti >= 0);
432: }
1.94 kristaps 433:
1.125 kristaps 434:
435: void
436: term_fontpop(struct termp *p)
437: {
438:
439: assert(p->fonti);
440: p->fonti--;
1.17 kristaps 441: }
442:
443:
1.71 kristaps 444: /*
445: * Handle pwords, partial words, which may be either a single word or a
446: * phrase that cannot be broken down (such as a literal string). This
447: * handles word styling.
448: */
1.86 kristaps 449: void
450: term_word(struct termp *p, const char *word)
1.65 kristaps 451: {
1.124 kristaps 452: const char *sv, *seq;
1.125 kristaps 453: int sz;
1.124 kristaps 454: size_t ssz;
455: enum roffdeco deco;
1.71 kristaps 456:
1.100 kristaps 457: sv = word;
458:
1.123 kristaps 459: if (word[0] && '\0' == word[1])
1.100 kristaps 460: switch (word[0]) {
461: case('.'):
462: /* FALLTHROUGH */
463: case(','):
464: /* FALLTHROUGH */
465: case(';'):
466: /* FALLTHROUGH */
467: case(':'):
468: /* FALLTHROUGH */
469: case('?'):
470: /* FALLTHROUGH */
471: case('!'):
472: /* FALLTHROUGH */
473: case(')'):
474: /* FALLTHROUGH */
475: case(']'):
476: if ( ! (TERMP_IGNDELIM & p->flags))
477: p->flags |= TERMP_NOSPACE;
478: break;
479: default:
480: break;
481: }
1.65 kristaps 482:
1.133 kristaps 483: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 484: if ( ! (TERMP_KEEP & p->flags)) {
485: if (TERMP_PREKEEP & p->flags)
486: p->flags |= TERMP_KEEP;
1.133 kristaps 487: bufferc(p, ' ');
1.151 schwarze 488: if (TERMP_SENTENCE & p->flags)
489: bufferc(p, ' ');
490: } else
491: bufferc(p, ASCII_NBRSP);
1.133 kristaps 492: }
1.65 kristaps 493:
1.71 kristaps 494: if ( ! (p->flags & TERMP_NONOSPACE))
495: p->flags &= ~TERMP_NOSPACE;
1.133 kristaps 496:
497: p->flags &= ~TERMP_SENTENCE;
1.65 kristaps 498:
1.125 kristaps 499: /* FIXME: use strcspn. */
1.124 kristaps 500:
501: while (*word) {
502: if ('\\' != *word) {
1.125 kristaps 503: encode(p, word, 1);
1.124 kristaps 504: word++;
505: continue;
506: }
507:
508: seq = ++word;
509: sz = a2roffdeco(&deco, &seq, &ssz);
510:
511: switch (deco) {
512: case (DECO_RESERVED):
1.125 kristaps 513: res(p, seq, ssz);
1.124 kristaps 514: break;
515: case (DECO_SPECIAL):
1.125 kristaps 516: spec(p, seq, ssz);
1.124 kristaps 517: break;
518: case (DECO_BOLD):
1.125 kristaps 519: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 520: break;
521: case (DECO_ITALIC):
1.125 kristaps 522: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 523: break;
524: case (DECO_ROMAN):
1.125 kristaps 525: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 526: break;
527: case (DECO_PREVIOUS):
1.125 kristaps 528: term_fontlast(p);
1.124 kristaps 529: break;
530: default:
531: break;
532: }
1.127 kristaps 533:
1.124 kristaps 534: word += sz;
1.127 kristaps 535: if (DECO_NOSPACE == deco && '\0' == *word)
536: p->flags |= TERMP_NOSPACE;
1.124 kristaps 537: }
1.65 kristaps 538:
1.131 kristaps 539: /*
540: * Note that we don't process the pipe: the parser sees it as
541: * punctuation, but we don't in terms of typography.
542: */
1.100 kristaps 543: if (sv[0] && 0 == sv[1])
544: switch (sv[0]) {
545: case('('):
546: /* FALLTHROUGH */
547: case('['):
548: p->flags |= TERMP_NOSPACE;
549: break;
550: default:
551: break;
552: }
1.65 kristaps 553: }
554:
555:
1.71 kristaps 556: static void
1.125 kristaps 557: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 558: {
559:
1.125 kristaps 560: if (0 == p->maxcols)
561: p->maxcols = 1024;
562: while (sz >= p->maxcols)
563: p->maxcols <<= 2;
564:
565: p->buf = realloc(p->buf, p->maxcols);
566: if (NULL == p->buf) {
567: perror(NULL);
568: exit(EXIT_FAILURE);
1.71 kristaps 569: }
1.51 kristaps 570: }
571:
1.79 kristaps 572:
573: static void
1.125 kristaps 574: buffera(struct termp *p, const char *word, size_t sz)
1.79 kristaps 575: {
1.125 kristaps 576:
577: if (p->col + sz >= p->maxcols)
578: adjbuf(p, p->col + sz);
579:
1.126 kristaps 580: memcpy(&p->buf[(int)p->col], word, sz);
1.125 kristaps 581: p->col += sz;
582: }
583:
584:
585: static void
586: bufferc(struct termp *p, char c)
587: {
588:
589: if (p->col + 1 >= p->maxcols)
590: adjbuf(p, p->col + 1);
591:
1.126 kristaps 592: p->buf[(int)p->col++] = c;
1.125 kristaps 593: }
594:
595:
596: static void
597: encode(struct termp *p, const char *word, size_t sz)
598: {
599: enum termfont f;
600: int i;
601:
602: /*
603: * Encode and buffer a string of characters. If the current
604: * font mode is unset, buffer directly, else encode then buffer
605: * character by character.
606: */
607:
1.147 kristaps 608: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.125 kristaps 609: buffera(p, word, sz);
610: return;
611: }
612:
613: for (i = 0; i < (int)sz; i++) {
614: if ( ! isgraph((u_char)word[i])) {
615: bufferc(p, word[i]);
616: continue;
1.79 kristaps 617: }
1.125 kristaps 618:
619: if (TERMFONT_UNDER == f)
620: bufferc(p, '_');
621: else
622: bufferc(p, word[i]);
623:
624: bufferc(p, 8);
625: bufferc(p, word[i]);
1.79 kristaps 626: }
627: }
1.106 kristaps 628:
629:
1.107 kristaps 630: size_t
1.149 kristaps 631: term_len(const struct termp *p, size_t sz)
632: {
633:
634: return((*p->width)(p, ' ') * sz);
635: }
636:
637:
638: size_t
639: term_strlen(const struct termp *p, const char *cp)
640: {
641: size_t sz;
642:
643: for (sz = 0; *cp; cp++)
644: sz += (*p->width)(p, *cp);
645:
646: return(sz);
647: }
648:
649:
650: size_t
651: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 652: {
653: double r;
654:
1.107 kristaps 655: switch (su->unit) {
1.106 kristaps 656: case (SCALE_CM):
1.107 kristaps 657: r = su->scale * 2;
1.106 kristaps 658: break;
659: case (SCALE_IN):
1.107 kristaps 660: r = su->scale * 6;
1.106 kristaps 661: break;
662: case (SCALE_PC):
1.107 kristaps 663: r = su->scale;
1.106 kristaps 664: break;
665: case (SCALE_PT):
1.107 kristaps 666: r = su->scale / 8;
1.106 kristaps 667: break;
668: case (SCALE_MM):
1.107 kristaps 669: r = su->scale / 1000;
1.106 kristaps 670: break;
671: case (SCALE_VS):
1.107 kristaps 672: r = su->scale;
1.106 kristaps 673: break;
674: default:
1.107 kristaps 675: r = su->scale - 1;
1.106 kristaps 676: break;
677: }
678:
679: if (r < 0.0)
680: r = 0.0;
1.107 kristaps 681: return(/* LINTED */(size_t)
1.106 kristaps 682: r);
683: }
684:
685:
1.107 kristaps 686: size_t
1.149 kristaps 687: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 688: {
689: double r;
690:
1.108 kristaps 691: /* XXX: CM, IN, and PT are approximations. */
692:
1.107 kristaps 693: switch (su->unit) {
1.106 kristaps 694: case (SCALE_CM):
1.108 kristaps 695: r = 4 * su->scale;
1.106 kristaps 696: break;
697: case (SCALE_IN):
1.108 kristaps 698: /* XXX: this is an approximation. */
699: r = 10 * su->scale;
1.106 kristaps 700: break;
701: case (SCALE_PC):
1.108 kristaps 702: r = (10 * su->scale) / 6;
1.106 kristaps 703: break;
704: case (SCALE_PT):
1.108 kristaps 705: r = (10 * su->scale) / 72;
1.106 kristaps 706: break;
707: case (SCALE_MM):
1.107 kristaps 708: r = su->scale / 1000; /* FIXME: double-check. */
1.106 kristaps 709: break;
710: case (SCALE_VS):
1.107 kristaps 711: r = su->scale * 2 - 1; /* FIXME: double-check. */
1.106 kristaps 712: break;
713: default:
1.107 kristaps 714: r = su->scale;
1.106 kristaps 715: break;
716: }
717:
718: if (r < 0.0)
719: r = 0.0;
1.107 kristaps 720: return((size_t)/* LINTED */
1.106 kristaps 721: r);
722: }
723:
724:
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