Annotation of mandoc/term.c, Revision 1.200
1.200 ! schwarze 1: /* $Id: term.c,v 1.199 2011/09/18 21:18:19 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);
1.81 kristaps 187: if (TERMP_NOBREAK & p->flags) {
1.139 schwarze 188: p->viscol = p->rmargin;
1.146 kristaps 189: (*p->advance)(p, p->rmargin);
1.136 schwarze 190: vend += p->rmargin - p->offset;
1.81 kristaps 191: } else {
1.139 schwarze 192: p->viscol = 0;
1.136 schwarze 193: vbl = p->offset;
1.81 kristaps 194: }
1.130 kristaps 195:
1.129 kristaps 196: /* Remove the p->overstep width. */
1.130 kristaps 197:
1.174 schwarze 198: bp += (size_t)p->overstep;
1.129 kristaps 199: p->overstep = 0;
1.71 kristaps 200: }
1.138 schwarze 201:
1.130 kristaps 202: /* Write out the [remaining] word. */
1.188 kristaps 203: for ( ; i < p->col; i++) {
1.140 kristaps 204: if (vend > bp && jhy > 0 && i > jhy)
205: break;
1.138 schwarze 206: if ('\t' == p->buf[i])
207: break;
1.136 schwarze 208: if (' ' == p->buf[i]) {
1.164 kristaps 209: j = i;
210: while (' ' == p->buf[i])
1.136 schwarze 211: i++;
1.174 schwarze 212: dv = (size_t)(i - j) * (*p->width)(p, ' ');
1.172 schwarze 213: vbl += dv;
214: vend += dv;
1.71 kristaps 215: break;
1.136 schwarze 216: }
217: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 218: vbl += (*p->width)(p, ' ');
1.136 schwarze 219: continue;
220: }
1.130 kristaps 221:
1.136 schwarze 222: /*
223: * Now we definitely know there will be
224: * printable characters to output,
225: * so write preceding white space now.
226: */
227: if (vbl) {
1.146 kristaps 228: (*p->advance)(p, vbl);
1.139 schwarze 229: p->viscol += vbl;
1.136 schwarze 230: vbl = 0;
231: }
1.140 kristaps 232:
1.153 kristaps 233: if (ASCII_HYPH == p->buf[i]) {
1.146 kristaps 234: (*p->letter)(p, '-');
1.153 kristaps 235: p->viscol += (*p->width)(p, '-');
1.200 ! schwarze 236: continue;
! 237: }
! 238:
! 239: (*p->letter)(p, p->buf[i]);
! 240: if (8 == p->buf[i])
! 241: p->viscol -= (*p->width)(p, p->buf[i-1]);
! 242: else
1.153 kristaps 243: p->viscol += (*p->width)(p, p->buf[i]);
1.136 schwarze 244: }
245: vis = vend;
1.71 kristaps 246: }
1.168 schwarze 247:
248: /*
249: * If there was trailing white space, it was not printed;
250: * so reset the cursor position accordingly.
251: */
1.200 ! schwarze 252: if (vis)
! 253: vis -= vbl;
1.111 kristaps 254:
1.91 kristaps 255: p->col = 0;
1.129 kristaps 256: p->overstep = 0;
1.15 kristaps 257:
1.91 kristaps 258: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 259: p->viscol = 0;
1.146 kristaps 260: (*p->endline)(p);
1.15 kristaps 261: return;
1.71 kristaps 262: }
1.15 kristaps 263:
1.91 kristaps 264: if (TERMP_HANG & p->flags) {
265: /* We need one blank after the tag. */
1.174 schwarze 266: p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
1.91 kristaps 267:
268: /*
269: * Behave exactly the same way as groff:
1.92 kristaps 270: * If we have overstepped the margin, temporarily move
271: * it to the right and flag the rest of the line to be
272: * shorter.
1.91 kristaps 273: * If we landed right at the margin, be happy.
1.92 kristaps 274: * If we are one step before the margin, temporarily
275: * move it one step LEFT and flag the rest of the line
276: * to be longer.
1.91 kristaps 277: */
1.200 ! schwarze 278: if (p->overstep < -1)
1.129 kristaps 279: p->overstep = 0;
1.200 ! schwarze 280: return;
1.91 kristaps 281:
282: } else if (TERMP_DANGLE & p->flags)
283: return;
1.15 kristaps 284:
1.200 ! schwarze 285: /* If the column was overrun, break the line. */
! 286: if (maxvis <= vis +
1.174 schwarze 287: ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
1.146 kristaps 288: (*p->endline)(p);
1.200 ! schwarze 289: p->viscol = 0;
1.91 kristaps 290: }
1.15 kristaps 291: }
292:
293:
1.71 kristaps 294: /*
295: * A newline only breaks an existing line; it won't assert vertical
296: * space. All data in the output buffer is flushed prior to the newline
297: * assertion.
298: */
299: void
300: term_newln(struct termp *p)
1.15 kristaps 301: {
302:
1.71 kristaps 303: p->flags |= TERMP_NOSPACE;
1.200 ! schwarze 304: if (p->col || p->viscol)
! 305: term_flushln(p);
1.16 kristaps 306: }
307:
308:
1.71 kristaps 309: /*
310: * Asserts a vertical space (a full, empty line-break between lines).
311: * Note that if used twice, this will cause two blank spaces and so on.
312: * All data in the output buffer is flushed prior to the newline
313: * assertion.
314: */
315: void
316: term_vspace(struct termp *p)
1.16 kristaps 317: {
318:
1.62 kristaps 319: term_newln(p);
1.139 schwarze 320: p->viscol = 0;
1.146 kristaps 321: (*p->endline)(p);
1.16 kristaps 322: }
323:
1.125 kristaps 324: void
325: term_fontlast(struct termp *p)
326: {
327: enum termfont f;
328:
329: f = p->fontl;
330: p->fontl = p->fontq[p->fonti];
331: p->fontq[p->fonti] = f;
332: }
333:
334:
335: void
336: term_fontrepl(struct termp *p, enum termfont f)
337: {
338:
339: p->fontl = p->fontq[p->fonti];
340: p->fontq[p->fonti] = f;
341: }
342:
343:
344: void
345: term_fontpush(struct termp *p, enum termfont f)
346: {
347:
348: assert(p->fonti + 1 < 10);
349: p->fontl = p->fontq[p->fonti];
350: p->fontq[++p->fonti] = f;
351: }
352:
353:
354: const void *
355: term_fontq(struct termp *p)
356: {
357:
358: return(&p->fontq[p->fonti]);
359: }
360:
361:
362: enum termfont
363: term_fonttop(struct termp *p)
364: {
365:
366: return(p->fontq[p->fonti]);
367: }
368:
369:
370: void
371: term_fontpopq(struct termp *p, const void *key)
372: {
373:
374: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
375: p->fonti--;
376: assert(p->fonti >= 0);
377: }
1.94 kristaps 378:
1.125 kristaps 379:
380: void
381: term_fontpop(struct termp *p)
382: {
383:
384: assert(p->fonti);
385: p->fonti--;
1.17 kristaps 386: }
387:
1.71 kristaps 388: /*
389: * Handle pwords, partial words, which may be either a single word or a
390: * phrase that cannot be broken down (such as a literal string). This
391: * handles word styling.
392: */
1.86 kristaps 393: void
394: term_word(struct termp *p, const char *word)
1.65 kristaps 395: {
1.191 kristaps 396: const char *seq, *cp;
397: char c;
1.194 kristaps 398: int sz, uc;
1.124 kristaps 399: size_t ssz;
1.184 kristaps 400: enum mandoc_esc esc;
1.100 kristaps 401:
1.133 kristaps 402: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 403: if ( ! (TERMP_KEEP & p->flags)) {
404: if (TERMP_PREKEEP & p->flags)
405: p->flags |= TERMP_KEEP;
1.133 kristaps 406: bufferc(p, ' ');
1.151 schwarze 407: if (TERMP_SENTENCE & p->flags)
408: bufferc(p, ' ');
409: } else
410: bufferc(p, ASCII_NBRSP);
1.133 kristaps 411: }
1.65 kristaps 412:
1.71 kristaps 413: if ( ! (p->flags & TERMP_NONOSPACE))
414: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 415: else
416: p->flags |= TERMP_NOSPACE;
1.133 kristaps 417:
1.173 schwarze 418: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
1.65 kristaps 419:
1.184 kristaps 420: while ('\0' != *word) {
1.162 kristaps 421: if ((ssz = strcspn(word, "\\")) > 0)
422: encode(p, word, ssz);
1.124 kristaps 423:
1.178 kristaps 424: word += (int)ssz;
1.162 kristaps 425: if ('\\' != *word)
1.124 kristaps 426: continue;
427:
1.184 kristaps 428: word++;
429: esc = mandoc_escape(&word, &seq, &sz);
430: if (ESCAPE_ERROR == esc)
431: break;
1.124 kristaps 432:
1.196 kristaps 433: if (TERMENC_ASCII != p->enc)
434: switch (esc) {
435: case (ESCAPE_UNICODE):
436: uc = mchars_num2uc(seq + 1, sz - 1);
437: if ('\0' == uc)
438: break;
439: encode1(p, uc);
440: continue;
441: case (ESCAPE_SPECIAL):
442: uc = mchars_spec2cp(p->symtab, seq, sz);
443: if (uc <= 0)
444: break;
445: encode1(p, uc);
446: continue;
447: default:
448: break;
449: }
450:
1.184 kristaps 451: switch (esc) {
1.192 kristaps 452: case (ESCAPE_UNICODE):
1.196 kristaps 453: encode1(p, '?');
1.192 kristaps 454: break;
1.184 kristaps 455: case (ESCAPE_NUMBERED):
1.196 kristaps 456: c = mchars_num2char(seq, sz);
457: if ('\0' != c)
1.191 kristaps 458: encode(p, &c, 1);
1.184 kristaps 459: break;
460: case (ESCAPE_SPECIAL):
1.191 kristaps 461: cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
462: if (NULL != cp)
463: encode(p, cp, ssz);
464: else if (1 == ssz)
465: encode(p, seq, sz);
1.124 kristaps 466: break;
1.184 kristaps 467: case (ESCAPE_FONTBOLD):
1.125 kristaps 468: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 469: break;
1.184 kristaps 470: case (ESCAPE_FONTITALIC):
1.125 kristaps 471: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 472: break;
1.195 kristaps 473: case (ESCAPE_FONT):
474: /* FALLTHROUGH */
1.184 kristaps 475: case (ESCAPE_FONTROMAN):
1.125 kristaps 476: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 477: break;
1.184 kristaps 478: case (ESCAPE_FONTPREV):
1.125 kristaps 479: term_fontlast(p);
1.124 kristaps 480: break;
1.184 kristaps 481: case (ESCAPE_NOSPACE):
482: if ('\0' == *word)
483: p->flags |= TERMP_NOSPACE;
484: break;
1.124 kristaps 485: default:
486: break;
487: }
488: }
1.65 kristaps 489: }
490:
1.71 kristaps 491: static void
1.188 kristaps 492: adjbuf(struct termp *p, int sz)
1.51 kristaps 493: {
494:
1.125 kristaps 495: if (0 == p->maxcols)
496: p->maxcols = 1024;
497: while (sz >= p->maxcols)
498: p->maxcols <<= 2;
499:
1.188 kristaps 500: p->buf = mandoc_realloc
501: (p->buf, sizeof(int) * (size_t)p->maxcols);
1.51 kristaps 502: }
503:
1.79 kristaps 504: static void
1.125 kristaps 505: bufferc(struct termp *p, char c)
506: {
507:
508: if (p->col + 1 >= p->maxcols)
509: adjbuf(p, p->col + 1);
510:
1.188 kristaps 511: p->buf[p->col++] = c;
1.125 kristaps 512: }
513:
1.194 kristaps 514: /*
515: * See encode().
516: * Do this for a single (probably unicode) value.
517: * Does not check for non-decorated glyphs.
518: */
519: static void
520: encode1(struct termp *p, int c)
521: {
522: enum termfont f;
523:
524: if (p->col + 4 >= p->maxcols)
525: adjbuf(p, p->col + 4);
526:
527: f = term_fonttop(p);
528:
529: if (TERMFONT_NONE == f) {
530: p->buf[p->col++] = c;
531: return;
532: } else if (TERMFONT_UNDER == f) {
533: p->buf[p->col++] = '_';
534: } else
535: p->buf[p->col++] = c;
536:
537: p->buf[p->col++] = 8;
538: p->buf[p->col++] = c;
539: }
540:
1.125 kristaps 541: static void
542: encode(struct termp *p, const char *word, size_t sz)
543: {
544: enum termfont f;
1.188 kristaps 545: int i, len;
546:
547: /* LINTED */
548: len = sz;
1.125 kristaps 549:
550: /*
551: * Encode and buffer a string of characters. If the current
552: * font mode is unset, buffer directly, else encode then buffer
553: * character by character.
554: */
555:
1.147 kristaps 556: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.188 kristaps 557: if (p->col + len >= p->maxcols)
558: adjbuf(p, p->col + len);
559: for (i = 0; i < len; i++)
560: p->buf[p->col++] = word[i];
1.125 kristaps 561: return;
562: }
563:
1.165 kristaps 564: /* Pre-buffer, assuming worst-case. */
565:
1.188 kristaps 566: if (p->col + 1 + (len * 3) >= p->maxcols)
567: adjbuf(p, p->col + 1 + (len * 3));
1.165 kristaps 568:
1.188 kristaps 569: for (i = 0; i < len; i++) {
1.199 schwarze 570: if (ASCII_HYPH != word[i] &&
571: ! isgraph((unsigned char)word[i])) {
1.188 kristaps 572: p->buf[p->col++] = word[i];
1.125 kristaps 573: continue;
1.79 kristaps 574: }
1.125 kristaps 575:
576: if (TERMFONT_UNDER == f)
1.188 kristaps 577: p->buf[p->col++] = '_';
1.199 schwarze 578: else if (ASCII_HYPH == word[i])
579: p->buf[p->col++] = '-';
1.125 kristaps 580: else
1.188 kristaps 581: p->buf[p->col++] = word[i];
1.125 kristaps 582:
1.188 kristaps 583: p->buf[p->col++] = 8;
584: p->buf[p->col++] = word[i];
1.79 kristaps 585: }
586: }
1.106 kristaps 587:
1.107 kristaps 588: size_t
1.149 kristaps 589: term_len(const struct termp *p, size_t sz)
590: {
591:
592: return((*p->width)(p, ' ') * sz);
593: }
594:
595:
596: size_t
597: term_strlen(const struct termp *p, const char *cp)
598: {
1.184 kristaps 599: size_t sz, rsz, i;
1.190 kristaps 600: int ssz, c;
1.171 kristaps 601: const char *seq, *rhs;
1.196 kristaps 602: enum mandoc_esc esc;
1.189 kristaps 603: static const char rej[] = { '\\', ASCII_HYPH, ASCII_NBRSP, '\0' };
1.171 kristaps 604:
1.184 kristaps 605: /*
606: * Account for escaped sequences within string length
607: * calculations. This follows the logic in term_word() as we
608: * must calculate the width of produced strings.
609: */
610:
611: sz = 0;
1.189 kristaps 612: while ('\0' != *cp) {
613: rsz = strcspn(cp, rej);
614: for (i = 0; i < rsz; i++)
615: sz += (*p->width)(p, *cp++);
616:
1.192 kristaps 617: c = 0;
1.184 kristaps 618: switch (*cp) {
619: case ('\\'):
1.189 kristaps 620: cp++;
1.196 kristaps 621: esc = mandoc_escape(&cp, &seq, &ssz);
622: if (ESCAPE_ERROR == esc)
1.184 kristaps 623: return(sz);
1.196 kristaps 624:
625: if (TERMENC_ASCII != p->enc)
626: switch (esc) {
627: case (ESCAPE_UNICODE):
628: c = mchars_num2uc
629: (seq + 1, ssz - 1);
630: if ('\0' == c)
631: break;
632: sz += (*p->width)(p, c);
633: continue;
634: case (ESCAPE_SPECIAL):
635: c = mchars_spec2cp
636: (p->symtab, seq, ssz);
637: if (c <= 0)
638: break;
639: sz += (*p->width)(p, c);
640: continue;
641: default:
1.194 kristaps 642: break;
643: }
1.196 kristaps 644:
645: rhs = NULL;
646:
647: switch (esc) {
648: case (ESCAPE_UNICODE):
649: sz += (*p->width)(p, '?');
1.194 kristaps 650: break;
1.190 kristaps 651: case (ESCAPE_NUMBERED):
1.194 kristaps 652: c = mchars_num2char(seq, ssz);
1.190 kristaps 653: if ('\0' != c)
654: sz += (*p->width)(p, c);
1.171 kristaps 655: break;
1.184 kristaps 656: case (ESCAPE_SPECIAL):
1.185 kristaps 657: rhs = mchars_spec2str
1.171 kristaps 658: (p->symtab, seq, ssz, &rsz);
659:
1.184 kristaps 660: if (ssz != 1 || rhs)
1.171 kristaps 661: break;
662:
663: rhs = seq;
664: rsz = ssz;
665: break;
666: default:
667: break;
668: }
1.149 kristaps 669:
1.184 kristaps 670: if (NULL == rhs)
671: break;
672:
673: for (i = 0; i < rsz; i++)
674: sz += (*p->width)(p, *rhs++);
675: break;
676: case (ASCII_NBRSP):
1.176 kristaps 677: sz += (*p->width)(p, ' ');
678: cp++;
1.184 kristaps 679: break;
680: case (ASCII_HYPH):
1.176 kristaps 681: sz += (*p->width)(p, '-');
682: cp++;
1.184 kristaps 683: break;
684: default:
685: break;
686: }
1.189 kristaps 687: }
1.149 kristaps 688:
689: return(sz);
690: }
691:
1.157 kristaps 692: /* ARGSUSED */
1.149 kristaps 693: size_t
694: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 695: {
696: double r;
697:
1.107 kristaps 698: switch (su->unit) {
1.106 kristaps 699: case (SCALE_CM):
1.107 kristaps 700: r = su->scale * 2;
1.106 kristaps 701: break;
702: case (SCALE_IN):
1.107 kristaps 703: r = su->scale * 6;
1.106 kristaps 704: break;
705: case (SCALE_PC):
1.107 kristaps 706: r = su->scale;
1.106 kristaps 707: break;
708: case (SCALE_PT):
1.107 kristaps 709: r = su->scale / 8;
1.106 kristaps 710: break;
711: case (SCALE_MM):
1.107 kristaps 712: r = su->scale / 1000;
1.106 kristaps 713: break;
714: case (SCALE_VS):
1.107 kristaps 715: r = su->scale;
1.106 kristaps 716: break;
717: default:
1.107 kristaps 718: r = su->scale - 1;
1.106 kristaps 719: break;
720: }
721:
722: if (r < 0.0)
723: r = 0.0;
1.107 kristaps 724: return(/* LINTED */(size_t)
1.106 kristaps 725: r);
726: }
727:
1.107 kristaps 728: size_t
1.149 kristaps 729: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 730: {
1.156 kristaps 731: double v;
1.108 kristaps 732:
1.156 kristaps 733: v = ((*p->hspan)(p, su));
734: if (v < 0.0)
735: v = 0.0;
736: return((size_t) /* LINTED */
737: v);
1.106 kristaps 738: }
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