Annotation of mandoc/term.c, Revision 1.201
1.201 ! schwarze 1: /* $Id: term.c,v 1.200 2011/09/19 22:36:16 schwarze Exp $ */
1.1 kristaps 2: /*
1.198 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 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"
1.107 kristaps 32: #include "out.h"
1.71 kristaps 33: #include "term.h"
1.105 kristaps 34: #include "main.h"
1.1 kristaps 35:
1.191 kristaps 36: static void adjbuf(struct termp *p, int);
37: static void bufferc(struct termp *, char);
38: static void encode(struct termp *, const char *, size_t);
1.194 kristaps 39: static void encode1(struct termp *, int);
1.11 kristaps 40:
1.145 kristaps 41: void
1.71 kristaps 42: term_free(struct termp *p)
1.14 kristaps 43: {
44:
1.71 kristaps 45: if (p->buf)
46: free(p->buf);
1.102 kristaps 47: if (p->symtab)
1.185 kristaps 48: mchars_free(p->symtab);
1.145 kristaps 49:
1.142 kristaps 50: free(p);
51: }
52:
53:
54: void
55: term_begin(struct termp *p, term_margin head,
56: term_margin foot, const void *arg)
57: {
58:
59: p->headf = head;
60: p->footf = foot;
61: p->argf = arg;
1.146 kristaps 62: (*p->begin)(p);
1.142 kristaps 63: }
64:
65:
66: void
67: term_end(struct termp *p)
68: {
69:
1.146 kristaps 70: (*p->end)(p);
1.14 kristaps 71: }
72:
1.71 kristaps 73: /*
74: * Flush a line of text. A "line" is loosely defined as being something
75: * that should be followed by a newline, regardless of whether it's
76: * broken apart by newlines getting there. A line can also be a
1.130 kristaps 77: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
78: * not have a trailing newline.
1.71 kristaps 79: *
1.130 kristaps 80: * The following flags may be specified:
1.71 kristaps 81: *
82: * - TERMP_NOBREAK: this is the most important and is used when making
1.200 schwarze 83: * columns. In short: don't print a newline and instead expect the
84: * next call to do the padding up to the start of the next column.
1.71 kristaps 85: *
1.200 schwarze 86: * - TERMP_TWOSPACE: make sure there is room for at least two space
87: * characters of padding. Otherwise, rather break the line.
1.91 kristaps 88: *
1.84 kristaps 89: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
90: * the line is overrun, and don't pad-right if it's underrun.
91: *
92: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
1.200 schwarze 93: * overrunning, instead save the position and continue at that point
1.84 kristaps 94: * when the next invocation.
1.71 kristaps 95: *
96: * In-line line breaking:
97: *
98: * If TERMP_NOBREAK is specified and the line overruns the right
99: * margin, it will break and pad-right to the right margin after
100: * writing. If maxrmargin is violated, it will break and continue
1.114 kristaps 101: * writing from the right-margin, which will lead to the above scenario
102: * upon exit. Otherwise, the line will break at the right margin.
1.71 kristaps 103: */
104: void
105: term_flushln(struct termp *p)
1.53 kristaps 106: {
1.114 kristaps 107: int i; /* current input position in p->buf */
108: size_t vis; /* current visual position on output */
109: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 110: size_t vend; /* end of word visual position on output */
1.114 kristaps 111: size_t bp; /* visual right border position */
1.172 schwarze 112: size_t dv; /* temporary for visual pos calculations */
1.152 kristaps 113: int j; /* temporary loop index for p->buf */
114: int jhy; /* last hyph before overflow w/r/t j */
115: size_t maxvis; /* output position of visible boundary */
116: size_t mmax; /* used in calculating bp */
1.53 kristaps 117:
1.71 kristaps 118: /*
119: * First, establish the maximum columns of "visible" content.
120: * This is usually the difference between the right-margin and
121: * an indentation, but can be, for tagged lists or columns, a
1.115 kristaps 122: * small set of values.
1.71 kristaps 123: */
1.175 kristaps 124: assert (p->rmargin >= p->offset);
1.174 schwarze 125: dv = p->rmargin - p->offset;
126: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
127: dv = p->maxrmargin - p->offset;
128: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 129:
1.71 kristaps 130: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 131:
1.136 schwarze 132: /*
1.200 schwarze 133: * Calculate the required amount of padding.
1.136 schwarze 134: */
1.200 schwarze 135: vbl = p->offset + p->overstep > p->viscol ?
136: p->offset + p->overstep - p->viscol : 0;
1.136 schwarze 137:
1.174 schwarze 138: vis = vend = 0;
139: i = 0;
1.115 kristaps 140:
1.188 kristaps 141: while (i < p->col) {
1.71 kristaps 142: /*
1.154 kristaps 143: * Handle literal tab characters: collapse all
144: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 145: */
1.188 kristaps 146: while (i < p->col && '\t' == p->buf[i]) {
1.154 kristaps 147: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 148: vbl += vend - vis;
149: vis = vend;
1.169 schwarze 150: i++;
1.138 schwarze 151: }
152:
153: /*
1.71 kristaps 154: * Count up visible word characters. Control sequences
155: * (starting with the CSI) aren't counted. A space
156: * generates a non-printing word, which is valid (the
157: * space is printed according to regular spacing rules).
158: */
159:
1.188 kristaps 160: for (j = i, jhy = 0; j < p->col; j++) {
1.138 schwarze 161: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71 kristaps 162: break;
1.154 kristaps 163:
164: /* Back over the the last printed character. */
165: if (8 == p->buf[j]) {
1.153 kristaps 166: assert(j);
167: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 168: continue;
1.153 kristaps 169: }
1.154 kristaps 170:
171: /* Regular word. */
172: /* Break at the hyphen point if we overrun. */
173: if (vend > vis && vend < bp &&
174: ASCII_HYPH == p->buf[j])
175: jhy = j;
176:
177: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 178: }
1.53 kristaps 179:
1.71 kristaps 180: /*
1.81 kristaps 181: * Find out whether we would exceed the right margin.
1.136 schwarze 182: * If so, break to the next line.
1.81 kristaps 183: */
1.140 kristaps 184: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 185: vend -= vis;
1.146 kristaps 186: (*p->endline)(p);
1.201 ! schwarze 187: p->viscol = 0;
1.81 kristaps 188: if (TERMP_NOBREAK & p->flags) {
1.201 ! schwarze 189: vbl = p->rmargin;
1.136 schwarze 190: vend += p->rmargin - p->offset;
1.201 ! schwarze 191: } else
1.136 schwarze 192: vbl = p->offset;
1.130 kristaps 193:
1.129 kristaps 194: /* Remove the p->overstep width. */
1.130 kristaps 195:
1.174 schwarze 196: bp += (size_t)p->overstep;
1.129 kristaps 197: p->overstep = 0;
1.71 kristaps 198: }
1.138 schwarze 199:
1.130 kristaps 200: /* Write out the [remaining] word. */
1.188 kristaps 201: for ( ; i < p->col; i++) {
1.140 kristaps 202: if (vend > bp && jhy > 0 && i > jhy)
203: break;
1.138 schwarze 204: if ('\t' == p->buf[i])
205: break;
1.136 schwarze 206: if (' ' == p->buf[i]) {
1.164 kristaps 207: j = i;
208: while (' ' == p->buf[i])
1.136 schwarze 209: i++;
1.174 schwarze 210: dv = (size_t)(i - j) * (*p->width)(p, ' ');
1.172 schwarze 211: vbl += dv;
212: vend += dv;
1.71 kristaps 213: break;
1.136 schwarze 214: }
215: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 216: vbl += (*p->width)(p, ' ');
1.136 schwarze 217: continue;
218: }
1.130 kristaps 219:
1.136 schwarze 220: /*
221: * Now we definitely know there will be
222: * printable characters to output,
223: * so write preceding white space now.
224: */
225: if (vbl) {
1.146 kristaps 226: (*p->advance)(p, vbl);
1.139 schwarze 227: p->viscol += vbl;
1.136 schwarze 228: vbl = 0;
229: }
1.140 kristaps 230:
1.153 kristaps 231: if (ASCII_HYPH == p->buf[i]) {
1.146 kristaps 232: (*p->letter)(p, '-');
1.153 kristaps 233: p->viscol += (*p->width)(p, '-');
1.200 schwarze 234: continue;
235: }
236:
237: (*p->letter)(p, p->buf[i]);
238: if (8 == p->buf[i])
239: p->viscol -= (*p->width)(p, p->buf[i-1]);
240: else
1.153 kristaps 241: p->viscol += (*p->width)(p, p->buf[i]);
1.136 schwarze 242: }
243: vis = vend;
1.71 kristaps 244: }
1.168 schwarze 245:
246: /*
247: * If there was trailing white space, it was not printed;
248: * so reset the cursor position accordingly.
249: */
1.200 schwarze 250: if (vis)
251: vis -= vbl;
1.111 kristaps 252:
1.91 kristaps 253: p->col = 0;
1.129 kristaps 254: p->overstep = 0;
1.15 kristaps 255:
1.91 kristaps 256: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 257: p->viscol = 0;
1.146 kristaps 258: (*p->endline)(p);
1.15 kristaps 259: return;
1.71 kristaps 260: }
1.15 kristaps 261:
1.91 kristaps 262: if (TERMP_HANG & p->flags) {
263: /* We need one blank after the tag. */
1.174 schwarze 264: p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
1.91 kristaps 265:
266: /*
267: * Behave exactly the same way as groff:
1.92 kristaps 268: * If we have overstepped the margin, temporarily move
269: * it to the right and flag the rest of the line to be
270: * shorter.
1.91 kristaps 271: * If we landed right at the margin, be happy.
1.92 kristaps 272: * If we are one step before the margin, temporarily
273: * move it one step LEFT and flag the rest of the line
274: * to be longer.
1.91 kristaps 275: */
1.200 schwarze 276: if (p->overstep < -1)
1.129 kristaps 277: p->overstep = 0;
1.200 schwarze 278: return;
1.91 kristaps 279:
280: } else if (TERMP_DANGLE & p->flags)
281: return;
1.15 kristaps 282:
1.200 schwarze 283: /* If the column was overrun, break the line. */
284: if (maxvis <= vis +
1.174 schwarze 285: ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
1.146 kristaps 286: (*p->endline)(p);
1.200 schwarze 287: p->viscol = 0;
1.91 kristaps 288: }
1.15 kristaps 289: }
290:
291:
1.71 kristaps 292: /*
293: * A newline only breaks an existing line; it won't assert vertical
294: * space. All data in the output buffer is flushed prior to the newline
295: * assertion.
296: */
297: void
298: term_newln(struct termp *p)
1.15 kristaps 299: {
300:
1.71 kristaps 301: p->flags |= TERMP_NOSPACE;
1.200 schwarze 302: if (p->col || p->viscol)
303: term_flushln(p);
1.16 kristaps 304: }
305:
306:
1.71 kristaps 307: /*
308: * Asserts a vertical space (a full, empty line-break between lines).
309: * Note that if used twice, this will cause two blank spaces and so on.
310: * All data in the output buffer is flushed prior to the newline
311: * assertion.
312: */
313: void
314: term_vspace(struct termp *p)
1.16 kristaps 315: {
316:
1.62 kristaps 317: term_newln(p);
1.139 schwarze 318: p->viscol = 0;
1.146 kristaps 319: (*p->endline)(p);
1.16 kristaps 320: }
321:
1.125 kristaps 322: void
323: term_fontlast(struct termp *p)
324: {
325: enum termfont f;
326:
327: f = p->fontl;
328: p->fontl = p->fontq[p->fonti];
329: p->fontq[p->fonti] = f;
330: }
331:
332:
333: void
334: term_fontrepl(struct termp *p, enum termfont f)
335: {
336:
337: p->fontl = p->fontq[p->fonti];
338: p->fontq[p->fonti] = f;
339: }
340:
341:
342: void
343: term_fontpush(struct termp *p, enum termfont f)
344: {
345:
346: assert(p->fonti + 1 < 10);
347: p->fontl = p->fontq[p->fonti];
348: p->fontq[++p->fonti] = f;
349: }
350:
351:
352: const void *
353: term_fontq(struct termp *p)
354: {
355:
356: return(&p->fontq[p->fonti]);
357: }
358:
359:
360: enum termfont
361: term_fonttop(struct termp *p)
362: {
363:
364: return(p->fontq[p->fonti]);
365: }
366:
367:
368: void
369: term_fontpopq(struct termp *p, const void *key)
370: {
371:
372: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
373: p->fonti--;
374: assert(p->fonti >= 0);
375: }
1.94 kristaps 376:
1.125 kristaps 377:
378: void
379: term_fontpop(struct termp *p)
380: {
381:
382: assert(p->fonti);
383: p->fonti--;
1.17 kristaps 384: }
385:
1.71 kristaps 386: /*
387: * Handle pwords, partial words, which may be either a single word or a
388: * phrase that cannot be broken down (such as a literal string). This
389: * handles word styling.
390: */
1.86 kristaps 391: void
392: term_word(struct termp *p, const char *word)
1.65 kristaps 393: {
1.191 kristaps 394: const char *seq, *cp;
395: char c;
1.194 kristaps 396: int sz, uc;
1.124 kristaps 397: size_t ssz;
1.184 kristaps 398: enum mandoc_esc esc;
1.100 kristaps 399:
1.133 kristaps 400: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 401: if ( ! (TERMP_KEEP & p->flags)) {
402: if (TERMP_PREKEEP & p->flags)
403: p->flags |= TERMP_KEEP;
1.133 kristaps 404: bufferc(p, ' ');
1.151 schwarze 405: if (TERMP_SENTENCE & p->flags)
406: bufferc(p, ' ');
407: } else
408: bufferc(p, ASCII_NBRSP);
1.133 kristaps 409: }
1.65 kristaps 410:
1.71 kristaps 411: if ( ! (p->flags & TERMP_NONOSPACE))
412: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 413: else
414: p->flags |= TERMP_NOSPACE;
1.133 kristaps 415:
1.173 schwarze 416: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
1.65 kristaps 417:
1.184 kristaps 418: while ('\0' != *word) {
1.162 kristaps 419: if ((ssz = strcspn(word, "\\")) > 0)
420: encode(p, word, ssz);
1.124 kristaps 421:
1.178 kristaps 422: word += (int)ssz;
1.162 kristaps 423: if ('\\' != *word)
1.124 kristaps 424: continue;
425:
1.184 kristaps 426: word++;
427: esc = mandoc_escape(&word, &seq, &sz);
428: if (ESCAPE_ERROR == esc)
429: break;
1.124 kristaps 430:
1.196 kristaps 431: if (TERMENC_ASCII != p->enc)
432: switch (esc) {
433: case (ESCAPE_UNICODE):
434: uc = mchars_num2uc(seq + 1, sz - 1);
435: if ('\0' == uc)
436: break;
437: encode1(p, uc);
438: continue;
439: case (ESCAPE_SPECIAL):
440: uc = mchars_spec2cp(p->symtab, seq, sz);
441: if (uc <= 0)
442: break;
443: encode1(p, uc);
444: continue;
445: default:
446: break;
447: }
448:
1.184 kristaps 449: switch (esc) {
1.192 kristaps 450: case (ESCAPE_UNICODE):
1.196 kristaps 451: encode1(p, '?');
1.192 kristaps 452: break;
1.184 kristaps 453: case (ESCAPE_NUMBERED):
1.196 kristaps 454: c = mchars_num2char(seq, sz);
455: if ('\0' != c)
1.191 kristaps 456: encode(p, &c, 1);
1.184 kristaps 457: break;
458: case (ESCAPE_SPECIAL):
1.191 kristaps 459: cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
460: if (NULL != cp)
461: encode(p, cp, ssz);
462: else if (1 == ssz)
463: encode(p, seq, sz);
1.124 kristaps 464: break;
1.184 kristaps 465: case (ESCAPE_FONTBOLD):
1.125 kristaps 466: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 467: break;
1.184 kristaps 468: case (ESCAPE_FONTITALIC):
1.125 kristaps 469: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 470: break;
1.195 kristaps 471: case (ESCAPE_FONT):
472: /* FALLTHROUGH */
1.184 kristaps 473: case (ESCAPE_FONTROMAN):
1.125 kristaps 474: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 475: break;
1.184 kristaps 476: case (ESCAPE_FONTPREV):
1.125 kristaps 477: term_fontlast(p);
1.124 kristaps 478: break;
1.184 kristaps 479: case (ESCAPE_NOSPACE):
480: if ('\0' == *word)
481: p->flags |= TERMP_NOSPACE;
482: break;
1.124 kristaps 483: default:
484: break;
485: }
486: }
1.65 kristaps 487: }
488:
1.71 kristaps 489: static void
1.188 kristaps 490: adjbuf(struct termp *p, int sz)
1.51 kristaps 491: {
492:
1.125 kristaps 493: if (0 == p->maxcols)
494: p->maxcols = 1024;
495: while (sz >= p->maxcols)
496: p->maxcols <<= 2;
497:
1.188 kristaps 498: p->buf = mandoc_realloc
499: (p->buf, sizeof(int) * (size_t)p->maxcols);
1.51 kristaps 500: }
501:
1.79 kristaps 502: static void
1.125 kristaps 503: bufferc(struct termp *p, char c)
504: {
505:
506: if (p->col + 1 >= p->maxcols)
507: adjbuf(p, p->col + 1);
508:
1.188 kristaps 509: p->buf[p->col++] = c;
1.125 kristaps 510: }
511:
1.194 kristaps 512: /*
513: * See encode().
514: * Do this for a single (probably unicode) value.
515: * Does not check for non-decorated glyphs.
516: */
517: static void
518: encode1(struct termp *p, int c)
519: {
520: enum termfont f;
521:
522: if (p->col + 4 >= p->maxcols)
523: adjbuf(p, p->col + 4);
524:
525: f = term_fonttop(p);
526:
527: if (TERMFONT_NONE == f) {
528: p->buf[p->col++] = c;
529: return;
530: } else if (TERMFONT_UNDER == f) {
531: p->buf[p->col++] = '_';
532: } else
533: p->buf[p->col++] = c;
534:
535: p->buf[p->col++] = 8;
536: p->buf[p->col++] = c;
537: }
538:
1.125 kristaps 539: static void
540: encode(struct termp *p, const char *word, size_t sz)
541: {
542: enum termfont f;
1.188 kristaps 543: int i, len;
544:
545: /* LINTED */
546: len = sz;
1.125 kristaps 547:
548: /*
549: * Encode and buffer a string of characters. If the current
550: * font mode is unset, buffer directly, else encode then buffer
551: * character by character.
552: */
553:
1.147 kristaps 554: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.188 kristaps 555: if (p->col + len >= p->maxcols)
556: adjbuf(p, p->col + len);
557: for (i = 0; i < len; i++)
558: p->buf[p->col++] = word[i];
1.125 kristaps 559: return;
560: }
561:
1.165 kristaps 562: /* Pre-buffer, assuming worst-case. */
563:
1.188 kristaps 564: if (p->col + 1 + (len * 3) >= p->maxcols)
565: adjbuf(p, p->col + 1 + (len * 3));
1.165 kristaps 566:
1.188 kristaps 567: for (i = 0; i < len; i++) {
1.199 schwarze 568: if (ASCII_HYPH != word[i] &&
569: ! isgraph((unsigned char)word[i])) {
1.188 kristaps 570: p->buf[p->col++] = word[i];
1.125 kristaps 571: continue;
1.79 kristaps 572: }
1.125 kristaps 573:
574: if (TERMFONT_UNDER == f)
1.188 kristaps 575: p->buf[p->col++] = '_';
1.199 schwarze 576: else if (ASCII_HYPH == word[i])
577: p->buf[p->col++] = '-';
1.125 kristaps 578: else
1.188 kristaps 579: p->buf[p->col++] = word[i];
1.125 kristaps 580:
1.188 kristaps 581: p->buf[p->col++] = 8;
582: p->buf[p->col++] = word[i];
1.79 kristaps 583: }
584: }
1.106 kristaps 585:
1.107 kristaps 586: size_t
1.149 kristaps 587: term_len(const struct termp *p, size_t sz)
588: {
589:
590: return((*p->width)(p, ' ') * sz);
591: }
592:
593:
594: size_t
595: term_strlen(const struct termp *p, const char *cp)
596: {
1.184 kristaps 597: size_t sz, rsz, i;
1.190 kristaps 598: int ssz, c;
1.171 kristaps 599: const char *seq, *rhs;
1.196 kristaps 600: enum mandoc_esc esc;
1.189 kristaps 601: static const char rej[] = { '\\', ASCII_HYPH, ASCII_NBRSP, '\0' };
1.171 kristaps 602:
1.184 kristaps 603: /*
604: * Account for escaped sequences within string length
605: * calculations. This follows the logic in term_word() as we
606: * must calculate the width of produced strings.
607: */
608:
609: sz = 0;
1.189 kristaps 610: while ('\0' != *cp) {
611: rsz = strcspn(cp, rej);
612: for (i = 0; i < rsz; i++)
613: sz += (*p->width)(p, *cp++);
614:
1.192 kristaps 615: c = 0;
1.184 kristaps 616: switch (*cp) {
617: case ('\\'):
1.189 kristaps 618: cp++;
1.196 kristaps 619: esc = mandoc_escape(&cp, &seq, &ssz);
620: if (ESCAPE_ERROR == esc)
1.184 kristaps 621: return(sz);
1.196 kristaps 622:
623: if (TERMENC_ASCII != p->enc)
624: switch (esc) {
625: case (ESCAPE_UNICODE):
626: c = mchars_num2uc
627: (seq + 1, ssz - 1);
628: if ('\0' == c)
629: break;
630: sz += (*p->width)(p, c);
631: continue;
632: case (ESCAPE_SPECIAL):
633: c = mchars_spec2cp
634: (p->symtab, seq, ssz);
635: if (c <= 0)
636: break;
637: sz += (*p->width)(p, c);
638: continue;
639: default:
1.194 kristaps 640: break;
641: }
1.196 kristaps 642:
643: rhs = NULL;
644:
645: switch (esc) {
646: case (ESCAPE_UNICODE):
647: sz += (*p->width)(p, '?');
1.194 kristaps 648: break;
1.190 kristaps 649: case (ESCAPE_NUMBERED):
1.194 kristaps 650: c = mchars_num2char(seq, ssz);
1.190 kristaps 651: if ('\0' != c)
652: sz += (*p->width)(p, c);
1.171 kristaps 653: break;
1.184 kristaps 654: case (ESCAPE_SPECIAL):
1.185 kristaps 655: rhs = mchars_spec2str
1.171 kristaps 656: (p->symtab, seq, ssz, &rsz);
657:
1.184 kristaps 658: if (ssz != 1 || rhs)
1.171 kristaps 659: break;
660:
661: rhs = seq;
662: rsz = ssz;
663: break;
664: default:
665: break;
666: }
1.149 kristaps 667:
1.184 kristaps 668: if (NULL == rhs)
669: break;
670:
671: for (i = 0; i < rsz; i++)
672: sz += (*p->width)(p, *rhs++);
673: break;
674: case (ASCII_NBRSP):
1.176 kristaps 675: sz += (*p->width)(p, ' ');
676: cp++;
1.184 kristaps 677: break;
678: case (ASCII_HYPH):
1.176 kristaps 679: sz += (*p->width)(p, '-');
680: cp++;
1.184 kristaps 681: break;
682: default:
683: break;
684: }
1.189 kristaps 685: }
1.149 kristaps 686:
687: return(sz);
688: }
689:
1.157 kristaps 690: /* ARGSUSED */
1.149 kristaps 691: size_t
692: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 693: {
694: double r;
695:
1.107 kristaps 696: switch (su->unit) {
1.106 kristaps 697: case (SCALE_CM):
1.107 kristaps 698: r = su->scale * 2;
1.106 kristaps 699: break;
700: case (SCALE_IN):
1.107 kristaps 701: r = su->scale * 6;
1.106 kristaps 702: break;
703: case (SCALE_PC):
1.107 kristaps 704: r = su->scale;
1.106 kristaps 705: break;
706: case (SCALE_PT):
1.107 kristaps 707: r = su->scale / 8;
1.106 kristaps 708: break;
709: case (SCALE_MM):
1.107 kristaps 710: r = su->scale / 1000;
1.106 kristaps 711: break;
712: case (SCALE_VS):
1.107 kristaps 713: r = su->scale;
1.106 kristaps 714: break;
715: default:
1.107 kristaps 716: r = su->scale - 1;
1.106 kristaps 717: break;
718: }
719:
720: if (r < 0.0)
721: r = 0.0;
1.107 kristaps 722: return(/* LINTED */(size_t)
1.106 kristaps 723: r);
724: }
725:
1.107 kristaps 726: size_t
1.149 kristaps 727: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 728: {
1.156 kristaps 729: double v;
1.108 kristaps 730:
1.156 kristaps 731: v = ((*p->hspan)(p, su));
732: if (v < 0.0)
733: v = 0.0;
734: return((size_t) /* LINTED */
735: v);
1.106 kristaps 736: }
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