Annotation of mandoc/term.c, Revision 1.180
1.180 ! kristaps 1: /* $Id: term.c,v 1.179 2011/03/17 08:49:34 kristaps Exp $ */
1.1 kristaps 2: /*
1.159 schwarze 3: * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
1.177 schwarze 4: * Copyright (c) 2010, 2011 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:
1.179 kristaps 83: p = mandoc_calloc(1, sizeof(struct termp));
1.71 kristaps 84: p->enc = enc;
85: return(p);
1.14 kristaps 86: }
87:
88:
1.71 kristaps 89: /*
90: * Flush a line of text. A "line" is loosely defined as being something
91: * that should be followed by a newline, regardless of whether it's
92: * broken apart by newlines getting there. A line can also be a
1.130 kristaps 93: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
94: * not have a trailing newline.
1.71 kristaps 95: *
1.130 kristaps 96: * The following flags may be specified:
1.71 kristaps 97: *
98: * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
99: * offset value. This is useful when doing columnar lists where the
100: * prior column has right-padded.
101: *
102: * - TERMP_NOBREAK: this is the most important and is used when making
103: * columns. In short: don't print a newline and instead pad to the
104: * right margin. Used in conjunction with TERMP_NOLPAD.
105: *
1.91 kristaps 106: * - TERMP_TWOSPACE: when padding, make sure there are at least two
107: * space characters of padding. Otherwise, rather break the line.
108: *
1.84 kristaps 109: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
110: * the line is overrun, and don't pad-right if it's underrun.
111: *
112: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
113: * overruning, instead save the position and continue at that point
114: * when the next invocation.
1.71 kristaps 115: *
116: * In-line line breaking:
117: *
118: * If TERMP_NOBREAK is specified and the line overruns the right
119: * margin, it will break and pad-right to the right margin after
120: * writing. If maxrmargin is violated, it will break and continue
1.114 kristaps 121: * writing from the right-margin, which will lead to the above scenario
122: * upon exit. Otherwise, the line will break at the right margin.
1.71 kristaps 123: */
124: void
125: term_flushln(struct termp *p)
1.53 kristaps 126: {
1.114 kristaps 127: int i; /* current input position in p->buf */
128: size_t vis; /* current visual position on output */
129: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 130: size_t vend; /* end of word visual position on output */
1.114 kristaps 131: size_t bp; /* visual right border position */
1.172 schwarze 132: size_t dv; /* temporary for visual pos calculations */
1.152 kristaps 133: int j; /* temporary loop index for p->buf */
134: int jhy; /* last hyph before overflow w/r/t j */
135: size_t maxvis; /* output position of visible boundary */
136: size_t mmax; /* used in calculating bp */
1.53 kristaps 137:
1.71 kristaps 138: /*
139: * First, establish the maximum columns of "visible" content.
140: * This is usually the difference between the right-margin and
141: * an indentation, but can be, for tagged lists or columns, a
1.115 kristaps 142: * small set of values.
1.71 kristaps 143: */
1.175 kristaps 144: assert (p->rmargin >= p->offset);
1.174 schwarze 145: dv = p->rmargin - p->offset;
146: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
147: dv = p->maxrmargin - p->offset;
148: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 149:
1.71 kristaps 150: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 151:
1.136 schwarze 152: /*
153: * Indent the first line of a paragraph.
154: */
1.174 schwarze 155: vbl = p->flags & TERMP_NOLPAD ? (size_t)0 : p->offset;
1.136 schwarze 156:
1.174 schwarze 157: vis = vend = 0;
158: i = 0;
1.115 kristaps 159:
1.136 schwarze 160: while (i < (int)p->col) {
1.71 kristaps 161: /*
1.154 kristaps 162: * Handle literal tab characters: collapse all
163: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 164: */
1.169 schwarze 165: while (i < (int)p->col && '\t' == p->buf[i]) {
1.154 kristaps 166: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 167: vbl += vend - vis;
168: vis = vend;
1.169 schwarze 169: i++;
1.138 schwarze 170: }
171:
172: /*
1.71 kristaps 173: * Count up visible word characters. Control sequences
174: * (starting with the CSI) aren't counted. A space
175: * generates a non-printing word, which is valid (the
176: * space is printed according to regular spacing rules).
177: */
178:
1.169 schwarze 179: for (j = i, jhy = 0; j < (int)p->col; j++) {
1.138 schwarze 180: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71 kristaps 181: break;
1.154 kristaps 182:
183: /* Back over the the last printed character. */
184: if (8 == p->buf[j]) {
1.153 kristaps 185: assert(j);
186: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 187: continue;
1.153 kristaps 188: }
1.154 kristaps 189:
190: /* Regular word. */
191: /* Break at the hyphen point if we overrun. */
192: if (vend > vis && vend < bp &&
193: ASCII_HYPH == p->buf[j])
194: jhy = j;
195:
196: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 197: }
1.53 kristaps 198:
1.71 kristaps 199: /*
1.81 kristaps 200: * Find out whether we would exceed the right margin.
1.136 schwarze 201: * If so, break to the next line.
1.81 kristaps 202: */
1.140 kristaps 203: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 204: vend -= vis;
1.146 kristaps 205: (*p->endline)(p);
1.81 kristaps 206: if (TERMP_NOBREAK & p->flags) {
1.139 schwarze 207: p->viscol = p->rmargin;
1.146 kristaps 208: (*p->advance)(p, p->rmargin);
1.136 schwarze 209: vend += p->rmargin - p->offset;
1.81 kristaps 210: } else {
1.139 schwarze 211: p->viscol = 0;
1.136 schwarze 212: vbl = p->offset;
1.81 kristaps 213: }
1.130 kristaps 214:
1.129 kristaps 215: /* Remove the p->overstep width. */
1.130 kristaps 216:
1.174 schwarze 217: bp += (size_t)p->overstep;
1.129 kristaps 218: p->overstep = 0;
1.71 kristaps 219: }
1.138 schwarze 220:
1.130 kristaps 221: /* Write out the [remaining] word. */
1.136 schwarze 222: for ( ; i < (int)p->col; i++) {
1.140 kristaps 223: if (vend > bp && jhy > 0 && i > jhy)
224: break;
1.138 schwarze 225: if ('\t' == p->buf[i])
226: break;
1.136 schwarze 227: if (' ' == p->buf[i]) {
1.164 kristaps 228: j = i;
229: while (' ' == p->buf[i])
1.136 schwarze 230: i++;
1.174 schwarze 231: dv = (size_t)(i - j) * (*p->width)(p, ' ');
1.172 schwarze 232: vbl += dv;
233: vend += dv;
1.71 kristaps 234: break;
1.136 schwarze 235: }
236: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 237: vbl += (*p->width)(p, ' ');
1.136 schwarze 238: continue;
239: }
1.130 kristaps 240:
1.136 schwarze 241: /*
242: * Now we definitely know there will be
243: * printable characters to output,
244: * so write preceding white space now.
245: */
246: if (vbl) {
1.146 kristaps 247: (*p->advance)(p, vbl);
1.139 schwarze 248: p->viscol += vbl;
1.136 schwarze 249: vbl = 0;
250: }
1.140 kristaps 251:
1.153 kristaps 252: if (ASCII_HYPH == p->buf[i]) {
1.146 kristaps 253: (*p->letter)(p, '-');
1.153 kristaps 254: p->viscol += (*p->width)(p, '-');
255: } else {
1.146 kristaps 256: (*p->letter)(p, p->buf[i]);
1.153 kristaps 257: p->viscol += (*p->width)(p, p->buf[i]);
258: }
1.136 schwarze 259: }
260: vis = vend;
1.71 kristaps 261: }
1.168 schwarze 262:
263: /*
264: * If there was trailing white space, it was not printed;
265: * so reset the cursor position accordingly.
266: */
267: vis -= vbl;
1.111 kristaps 268:
1.91 kristaps 269: p->col = 0;
1.129 kristaps 270: p->overstep = 0;
1.15 kristaps 271:
1.91 kristaps 272: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 273: p->viscol = 0;
1.146 kristaps 274: (*p->endline)(p);
1.15 kristaps 275: return;
1.71 kristaps 276: }
1.15 kristaps 277:
1.91 kristaps 278: if (TERMP_HANG & p->flags) {
279: /* We need one blank after the tag. */
1.174 schwarze 280: p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
1.91 kristaps 281:
282: /*
283: * Behave exactly the same way as groff:
1.92 kristaps 284: * If we have overstepped the margin, temporarily move
285: * it to the right and flag the rest of the line to be
286: * shorter.
1.91 kristaps 287: * If we landed right at the margin, be happy.
1.92 kristaps 288: * If we are one step before the margin, temporarily
289: * move it one step LEFT and flag the rest of the line
290: * to be longer.
1.91 kristaps 291: */
1.129 kristaps 292: if (p->overstep >= -1) {
293: assert((int)maxvis + p->overstep >= 0);
1.174 schwarze 294: maxvis += (size_t)p->overstep;
1.92 kristaps 295: } else
1.129 kristaps 296: p->overstep = 0;
1.91 kristaps 297:
298: } else if (TERMP_DANGLE & p->flags)
299: return;
1.15 kristaps 300:
1.92 kristaps 301: /* Right-pad. */
1.174 schwarze 302: if (maxvis > vis +
303: ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
1.139 schwarze 304: p->viscol += maxvis - vis;
1.146 kristaps 305: (*p->advance)(p, maxvis - vis);
1.142 kristaps 306: vis += (maxvis - vis);
1.139 schwarze 307: } else { /* ...or newline break. */
1.146 kristaps 308: (*p->endline)(p);
1.139 schwarze 309: p->viscol = p->rmargin;
1.146 kristaps 310: (*p->advance)(p, p->rmargin);
1.91 kristaps 311: }
1.15 kristaps 312: }
313:
314:
1.71 kristaps 315: /*
316: * A newline only breaks an existing line; it won't assert vertical
317: * space. All data in the output buffer is flushed prior to the newline
318: * assertion.
319: */
320: void
321: term_newln(struct termp *p)
1.15 kristaps 322: {
323:
1.71 kristaps 324: p->flags |= TERMP_NOSPACE;
1.139 schwarze 325: if (0 == p->col && 0 == p->viscol) {
1.71 kristaps 326: p->flags &= ~TERMP_NOLPAD;
1.15 kristaps 327: return;
1.16 kristaps 328: }
1.71 kristaps 329: term_flushln(p);
330: p->flags &= ~TERMP_NOLPAD;
1.16 kristaps 331: }
332:
333:
1.71 kristaps 334: /*
335: * Asserts a vertical space (a full, empty line-break between lines).
336: * Note that if used twice, this will cause two blank spaces and so on.
337: * All data in the output buffer is flushed prior to the newline
338: * assertion.
339: */
340: void
341: term_vspace(struct termp *p)
1.16 kristaps 342: {
343:
1.62 kristaps 344: term_newln(p);
1.139 schwarze 345: p->viscol = 0;
1.146 kristaps 346: (*p->endline)(p);
1.16 kristaps 347: }
348:
349:
1.71 kristaps 350: static void
1.177 schwarze 351: numbered(struct termp *p, const char *word, size_t len)
352: {
353: const char *rhs;
354:
355: rhs = chars_num2char(word, len);
356: if (rhs)
357: encode(p, rhs, 1);
358: }
359:
360:
361: static void
1.163 kristaps 362: spec(struct termp *p, enum roffdeco d, const char *word, size_t len)
1.17 kristaps 363: {
1.71 kristaps 364: const char *rhs;
365: size_t sz;
1.17 kristaps 366:
1.161 kristaps 367: rhs = chars_spec2str(p->symtab, word, len, &sz);
1.125 kristaps 368: if (rhs)
369: encode(p, rhs, sz);
1.163 kristaps 370: else if (DECO_SSPECIAL == d)
371: encode(p, word, len);
1.94 kristaps 372: }
373:
374:
375: static void
1.125 kristaps 376: res(struct termp *p, const char *word, size_t len)
1.94 kristaps 377: {
378: const char *rhs;
379: size_t sz;
380:
1.161 kristaps 381: rhs = chars_res2str(p->symtab, word, len, &sz);
1.125 kristaps 382: if (rhs)
383: encode(p, rhs, sz);
384: }
385:
386:
387: void
388: term_fontlast(struct termp *p)
389: {
390: enum termfont f;
391:
392: f = p->fontl;
393: p->fontl = p->fontq[p->fonti];
394: p->fontq[p->fonti] = f;
395: }
396:
397:
398: void
399: term_fontrepl(struct termp *p, enum termfont f)
400: {
401:
402: p->fontl = p->fontq[p->fonti];
403: p->fontq[p->fonti] = f;
404: }
405:
406:
407: void
408: term_fontpush(struct termp *p, enum termfont f)
409: {
410:
411: assert(p->fonti + 1 < 10);
412: p->fontl = p->fontq[p->fonti];
413: p->fontq[++p->fonti] = f;
414: }
415:
416:
417: const void *
418: term_fontq(struct termp *p)
419: {
420:
421: return(&p->fontq[p->fonti]);
422: }
423:
424:
425: enum termfont
426: term_fonttop(struct termp *p)
427: {
428:
429: return(p->fontq[p->fonti]);
430: }
431:
432:
433: void
434: term_fontpopq(struct termp *p, const void *key)
435: {
436:
437: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
438: p->fonti--;
439: assert(p->fonti >= 0);
440: }
1.94 kristaps 441:
1.125 kristaps 442:
443: void
444: term_fontpop(struct termp *p)
445: {
446:
447: assert(p->fonti);
448: p->fonti--;
1.17 kristaps 449: }
450:
451:
1.71 kristaps 452: /*
453: * Handle pwords, partial words, which may be either a single word or a
454: * phrase that cannot be broken down (such as a literal string). This
455: * handles word styling.
456: */
1.86 kristaps 457: void
458: term_word(struct termp *p, const char *word)
1.65 kristaps 459: {
1.124 kristaps 460: const char *sv, *seq;
461: size_t ssz;
462: enum roffdeco deco;
1.71 kristaps 463:
1.100 kristaps 464: sv = word;
465:
1.180 ! kristaps 466: if (DELIM_CLOSE == mandoc_isdelim(word))
! 467: if ( ! (TERMP_IGNDELIM & p->flags))
! 468: p->flags |= TERMP_NOSPACE;
1.65 kristaps 469:
1.133 kristaps 470: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 471: if ( ! (TERMP_KEEP & p->flags)) {
472: if (TERMP_PREKEEP & p->flags)
473: p->flags |= TERMP_KEEP;
1.133 kristaps 474: bufferc(p, ' ');
1.151 schwarze 475: if (TERMP_SENTENCE & p->flags)
476: bufferc(p, ' ');
477: } else
478: bufferc(p, ASCII_NBRSP);
1.133 kristaps 479: }
1.65 kristaps 480:
1.71 kristaps 481: if ( ! (p->flags & TERMP_NONOSPACE))
482: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 483: else
484: p->flags |= TERMP_NOSPACE;
1.133 kristaps 485:
1.173 schwarze 486: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
1.65 kristaps 487:
1.162 kristaps 488: while (*word) {
489: if ((ssz = strcspn(word, "\\")) > 0)
490: encode(p, word, ssz);
1.124 kristaps 491:
1.178 kristaps 492: word += (int)ssz;
1.162 kristaps 493: if ('\\' != *word)
1.124 kristaps 494: continue;
495:
496: seq = ++word;
1.171 kristaps 497: word += a2roffdeco(&deco, &seq, &ssz);
1.124 kristaps 498:
499: switch (deco) {
1.177 schwarze 500: case (DECO_NUMBERED):
501: numbered(p, seq, ssz);
502: break;
1.124 kristaps 503: case (DECO_RESERVED):
1.125 kristaps 504: res(p, seq, ssz);
1.124 kristaps 505: break;
506: case (DECO_SPECIAL):
1.163 kristaps 507: /* FALLTHROUGH */
508: case (DECO_SSPECIAL):
509: spec(p, deco, seq, ssz);
1.124 kristaps 510: break;
511: case (DECO_BOLD):
1.125 kristaps 512: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 513: break;
514: case (DECO_ITALIC):
1.125 kristaps 515: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 516: break;
517: case (DECO_ROMAN):
1.125 kristaps 518: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 519: break;
520: case (DECO_PREVIOUS):
1.125 kristaps 521: term_fontlast(p);
1.124 kristaps 522: break;
523: default:
524: break;
525: }
1.127 kristaps 526:
527: if (DECO_NOSPACE == deco && '\0' == *word)
528: p->flags |= TERMP_NOSPACE;
1.124 kristaps 529: }
1.65 kristaps 530:
1.180 ! kristaps 531: if (DELIM_OPEN == mandoc_isdelim(sv))
! 532: p->flags |= TERMP_NOSPACE;
1.65 kristaps 533: }
534:
535:
1.71 kristaps 536: static void
1.125 kristaps 537: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 538: {
539:
1.125 kristaps 540: if (0 == p->maxcols)
541: p->maxcols = 1024;
542: while (sz >= p->maxcols)
543: p->maxcols <<= 2;
544:
1.179 kristaps 545: p->buf = mandoc_realloc(p->buf, p->maxcols);
1.51 kristaps 546: }
547:
1.79 kristaps 548:
549: static void
1.125 kristaps 550: bufferc(struct termp *p, char c)
551: {
552:
553: if (p->col + 1 >= p->maxcols)
554: adjbuf(p, p->col + 1);
555:
1.126 kristaps 556: p->buf[(int)p->col++] = c;
1.125 kristaps 557: }
558:
559:
560: static void
561: encode(struct termp *p, const char *word, size_t sz)
562: {
563: enum termfont f;
564: int i;
565:
566: /*
567: * Encode and buffer a string of characters. If the current
568: * font mode is unset, buffer directly, else encode then buffer
569: * character by character.
570: */
571:
1.147 kristaps 572: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.165 kristaps 573: if (p->col + sz >= p->maxcols)
574: adjbuf(p, p->col + sz);
575: memcpy(&p->buf[(int)p->col], word, sz);
576: p->col += sz;
1.125 kristaps 577: return;
578: }
579:
1.165 kristaps 580: /* Pre-buffer, assuming worst-case. */
581:
582: if (p->col + 1 + (sz * 3) >= p->maxcols)
583: adjbuf(p, p->col + 1 + (sz * 3));
584:
1.125 kristaps 585: for (i = 0; i < (int)sz; i++) {
586: if ( ! isgraph((u_char)word[i])) {
1.165 kristaps 587: p->buf[(int)p->col++] = word[i];
1.125 kristaps 588: continue;
1.79 kristaps 589: }
1.125 kristaps 590:
591: if (TERMFONT_UNDER == f)
1.165 kristaps 592: p->buf[(int)p->col++] = '_';
1.125 kristaps 593: else
1.165 kristaps 594: p->buf[(int)p->col++] = word[i];
1.125 kristaps 595:
1.165 kristaps 596: p->buf[(int)p->col++] = 8;
597: p->buf[(int)p->col++] = word[i];
1.79 kristaps 598: }
599: }
1.106 kristaps 600:
601:
1.107 kristaps 602: size_t
1.149 kristaps 603: term_len(const struct termp *p, size_t sz)
604: {
605:
606: return((*p->width)(p, ' ') * sz);
607: }
608:
609:
610: size_t
611: term_strlen(const struct termp *p, const char *cp)
612: {
1.171 kristaps 613: size_t sz, ssz, rsz, i;
614: enum roffdeco d;
615: const char *seq, *rhs;
616:
617: for (sz = 0; '\0' != *cp; )
618: /*
619: * Account for escaped sequences within string length
620: * calculations. This follows the logic in term_word()
621: * as we must calculate the width of produced strings.
622: */
623: if ('\\' == *cp) {
624: seq = ++cp;
625: cp += a2roffdeco(&d, &seq, &ssz);
626:
627: switch (d) {
628: case (DECO_RESERVED):
629: rhs = chars_res2str
630: (p->symtab, seq, ssz, &rsz);
631: break;
632: case (DECO_SPECIAL):
633: /* FALLTHROUGH */
634: case (DECO_SSPECIAL):
635: rhs = chars_spec2str
636: (p->symtab, seq, ssz, &rsz);
637:
638: /* Allow for one-char escapes. */
639: if (DECO_SSPECIAL != d || rhs)
640: break;
641:
642: rhs = seq;
643: rsz = ssz;
644: break;
645: default:
646: rhs = NULL;
647: break;
648: }
1.149 kristaps 649:
1.171 kristaps 650: if (rhs)
651: for (i = 0; i < rsz; i++)
652: sz += (*p->width)(p, *rhs++);
1.176 kristaps 653: } else if (ASCII_NBRSP == *cp) {
654: sz += (*p->width)(p, ' ');
655: cp++;
656: } else if (ASCII_HYPH == *cp) {
657: sz += (*p->width)(p, '-');
658: cp++;
1.171 kristaps 659: } else
660: sz += (*p->width)(p, *cp++);
1.149 kristaps 661:
662: return(sz);
663: }
664:
665:
1.157 kristaps 666: /* ARGSUSED */
1.149 kristaps 667: size_t
668: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 669: {
670: double r;
671:
1.107 kristaps 672: switch (su->unit) {
1.106 kristaps 673: case (SCALE_CM):
1.107 kristaps 674: r = su->scale * 2;
1.106 kristaps 675: break;
676: case (SCALE_IN):
1.107 kristaps 677: r = su->scale * 6;
1.106 kristaps 678: break;
679: case (SCALE_PC):
1.107 kristaps 680: r = su->scale;
1.106 kristaps 681: break;
682: case (SCALE_PT):
1.107 kristaps 683: r = su->scale / 8;
1.106 kristaps 684: break;
685: case (SCALE_MM):
1.107 kristaps 686: r = su->scale / 1000;
1.106 kristaps 687: break;
688: case (SCALE_VS):
1.107 kristaps 689: r = su->scale;
1.106 kristaps 690: break;
691: default:
1.107 kristaps 692: r = su->scale - 1;
1.106 kristaps 693: break;
694: }
695:
696: if (r < 0.0)
697: r = 0.0;
1.107 kristaps 698: return(/* LINTED */(size_t)
1.106 kristaps 699: r);
700: }
701:
702:
1.107 kristaps 703: size_t
1.149 kristaps 704: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 705: {
1.156 kristaps 706: double v;
1.108 kristaps 707:
1.156 kristaps 708: v = ((*p->hspan)(p, su));
709: if (v < 0.0)
710: v = 0.0;
711: return((size_t) /* LINTED */
712: v);
1.106 kristaps 713: }
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