Annotation of mandoc/term.c, Revision 1.187
1.187 ! kristaps 1: /* $Id: term.c,v 1.186 2011/04/30 22:24:31 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"
1.107 kristaps 32: #include "out.h"
1.71 kristaps 33: #include "term.h"
1.105 kristaps 34: #include "main.h"
1.1 kristaps 35:
1.184 kristaps 36: static void spec(struct termp *, const char *, size_t);
1.125 kristaps 37: static void res(struct termp *, const char *, size_t);
38: static void bufferc(struct termp *, char);
39: static void adjbuf(struct termp *p, size_t);
40: static void encode(struct termp *, const char *, size_t);
1.11 kristaps 41:
42:
1.145 kristaps 43: void
1.71 kristaps 44: term_free(struct termp *p)
1.14 kristaps 45: {
46:
1.71 kristaps 47: if (p->buf)
48: free(p->buf);
1.102 kristaps 49: if (p->symtab)
1.185 kristaps 50: mchars_free(p->symtab);
1.145 kristaps 51:
1.142 kristaps 52: free(p);
53: }
54:
55:
56: void
57: term_begin(struct termp *p, term_margin head,
58: term_margin foot, const void *arg)
59: {
60:
61: p->headf = head;
62: p->footf = foot;
63: p->argf = arg;
1.146 kristaps 64: (*p->begin)(p);
1.142 kristaps 65: }
66:
67:
68: void
69: term_end(struct termp *p)
70: {
71:
1.146 kristaps 72: (*p->end)(p);
1.14 kristaps 73: }
74:
75:
1.145 kristaps 76: struct termp *
77: term_alloc(enum termenc enc)
1.14 kristaps 78: {
1.141 kristaps 79: struct termp *p;
1.14 kristaps 80:
1.179 kristaps 81: p = mandoc_calloc(1, sizeof(struct termp));
1.71 kristaps 82: p->enc = enc;
83: return(p);
1.14 kristaps 84: }
85:
86:
1.71 kristaps 87: /*
88: * Flush a line of text. A "line" is loosely defined as being something
89: * that should be followed by a newline, regardless of whether it's
90: * broken apart by newlines getting there. A line can also be a
1.130 kristaps 91: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
92: * not have a trailing newline.
1.71 kristaps 93: *
1.130 kristaps 94: * The following flags may be specified:
1.71 kristaps 95: *
96: * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
97: * offset value. This is useful when doing columnar lists where the
98: * prior column has right-padded.
99: *
100: * - TERMP_NOBREAK: this is the most important and is used when making
101: * columns. In short: don't print a newline and instead pad to the
102: * right margin. Used in conjunction with TERMP_NOLPAD.
103: *
1.91 kristaps 104: * - TERMP_TWOSPACE: when padding, make sure there are at least two
105: * space characters of padding. Otherwise, rather break the line.
106: *
1.84 kristaps 107: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
108: * the line is overrun, and don't pad-right if it's underrun.
109: *
110: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
111: * overruning, instead save the position and continue at that point
112: * when the next invocation.
1.71 kristaps 113: *
114: * In-line line breaking:
115: *
116: * If TERMP_NOBREAK is specified and the line overruns the right
117: * margin, it will break and pad-right to the right margin after
118: * writing. If maxrmargin is violated, it will break and continue
1.114 kristaps 119: * writing from the right-margin, which will lead to the above scenario
120: * upon exit. Otherwise, the line will break at the right margin.
1.71 kristaps 121: */
122: void
123: term_flushln(struct termp *p)
1.53 kristaps 124: {
1.114 kristaps 125: int i; /* current input position in p->buf */
126: size_t vis; /* current visual position on output */
127: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 128: size_t vend; /* end of word visual position on output */
1.114 kristaps 129: size_t bp; /* visual right border position */
1.172 schwarze 130: size_t dv; /* temporary for visual pos calculations */
1.152 kristaps 131: int j; /* temporary loop index for p->buf */
132: int jhy; /* last hyph before overflow w/r/t j */
133: size_t maxvis; /* output position of visible boundary */
134: size_t mmax; /* used in calculating bp */
1.53 kristaps 135:
1.71 kristaps 136: /*
137: * First, establish the maximum columns of "visible" content.
138: * This is usually the difference between the right-margin and
139: * an indentation, but can be, for tagged lists or columns, a
1.115 kristaps 140: * small set of values.
1.71 kristaps 141: */
1.175 kristaps 142: assert (p->rmargin >= p->offset);
1.174 schwarze 143: dv = p->rmargin - p->offset;
144: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
145: dv = p->maxrmargin - p->offset;
146: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 147:
1.71 kristaps 148: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 149:
1.136 schwarze 150: /*
151: * Indent the first line of a paragraph.
152: */
1.174 schwarze 153: vbl = p->flags & TERMP_NOLPAD ? (size_t)0 : p->offset;
1.136 schwarze 154:
1.174 schwarze 155: vis = vend = 0;
156: i = 0;
1.115 kristaps 157:
1.136 schwarze 158: while (i < (int)p->col) {
1.71 kristaps 159: /*
1.154 kristaps 160: * Handle literal tab characters: collapse all
161: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 162: */
1.169 schwarze 163: while (i < (int)p->col && '\t' == p->buf[i]) {
1.154 kristaps 164: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 165: vbl += vend - vis;
166: vis = vend;
1.169 schwarze 167: i++;
1.138 schwarze 168: }
169:
170: /*
1.71 kristaps 171: * Count up visible word characters. Control sequences
172: * (starting with the CSI) aren't counted. A space
173: * generates a non-printing word, which is valid (the
174: * space is printed according to regular spacing rules).
175: */
176:
1.169 schwarze 177: for (j = i, jhy = 0; j < (int)p->col; j++) {
1.138 schwarze 178: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71 kristaps 179: break;
1.154 kristaps 180:
181: /* Back over the the last printed character. */
182: if (8 == p->buf[j]) {
1.153 kristaps 183: assert(j);
184: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 185: continue;
1.153 kristaps 186: }
1.154 kristaps 187:
188: /* Regular word. */
189: /* Break at the hyphen point if we overrun. */
190: if (vend > vis && vend < bp &&
191: ASCII_HYPH == p->buf[j])
192: jhy = j;
193:
194: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 195: }
1.53 kristaps 196:
1.71 kristaps 197: /*
1.81 kristaps 198: * Find out whether we would exceed the right margin.
1.136 schwarze 199: * If so, break to the next line.
1.81 kristaps 200: */
1.140 kristaps 201: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 202: vend -= vis;
1.146 kristaps 203: (*p->endline)(p);
1.81 kristaps 204: if (TERMP_NOBREAK & p->flags) {
1.139 schwarze 205: p->viscol = p->rmargin;
1.146 kristaps 206: (*p->advance)(p, p->rmargin);
1.136 schwarze 207: vend += p->rmargin - p->offset;
1.81 kristaps 208: } else {
1.139 schwarze 209: p->viscol = 0;
1.136 schwarze 210: vbl = p->offset;
1.81 kristaps 211: }
1.130 kristaps 212:
1.129 kristaps 213: /* Remove the p->overstep width. */
1.130 kristaps 214:
1.174 schwarze 215: bp += (size_t)p->overstep;
1.129 kristaps 216: p->overstep = 0;
1.71 kristaps 217: }
1.138 schwarze 218:
1.130 kristaps 219: /* Write out the [remaining] word. */
1.136 schwarze 220: for ( ; i < (int)p->col; i++) {
1.140 kristaps 221: if (vend > bp && jhy > 0 && i > jhy)
222: break;
1.138 schwarze 223: if ('\t' == p->buf[i])
224: break;
1.136 schwarze 225: if (' ' == p->buf[i]) {
1.164 kristaps 226: j = i;
227: while (' ' == p->buf[i])
1.136 schwarze 228: i++;
1.174 schwarze 229: dv = (size_t)(i - j) * (*p->width)(p, ' ');
1.172 schwarze 230: vbl += dv;
231: vend += dv;
1.71 kristaps 232: break;
1.136 schwarze 233: }
234: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 235: vbl += (*p->width)(p, ' ');
1.136 schwarze 236: continue;
237: }
1.130 kristaps 238:
1.136 schwarze 239: /*
240: * Now we definitely know there will be
241: * printable characters to output,
242: * so write preceding white space now.
243: */
244: if (vbl) {
1.146 kristaps 245: (*p->advance)(p, vbl);
1.139 schwarze 246: p->viscol += vbl;
1.136 schwarze 247: vbl = 0;
248: }
1.140 kristaps 249:
1.153 kristaps 250: if (ASCII_HYPH == p->buf[i]) {
1.146 kristaps 251: (*p->letter)(p, '-');
1.153 kristaps 252: p->viscol += (*p->width)(p, '-');
253: } else {
1.146 kristaps 254: (*p->letter)(p, p->buf[i]);
1.153 kristaps 255: p->viscol += (*p->width)(p, p->buf[i]);
256: }
1.136 schwarze 257: }
258: vis = vend;
1.71 kristaps 259: }
1.168 schwarze 260:
261: /*
262: * If there was trailing white space, it was not printed;
263: * so reset the cursor position accordingly.
264: */
265: vis -= vbl;
1.111 kristaps 266:
1.91 kristaps 267: p->col = 0;
1.129 kristaps 268: p->overstep = 0;
1.15 kristaps 269:
1.91 kristaps 270: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 271: p->viscol = 0;
1.146 kristaps 272: (*p->endline)(p);
1.15 kristaps 273: return;
1.71 kristaps 274: }
1.15 kristaps 275:
1.91 kristaps 276: if (TERMP_HANG & p->flags) {
277: /* We need one blank after the tag. */
1.174 schwarze 278: p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
1.91 kristaps 279:
280: /*
281: * Behave exactly the same way as groff:
1.92 kristaps 282: * If we have overstepped the margin, temporarily move
283: * it to the right and flag the rest of the line to be
284: * shorter.
1.91 kristaps 285: * If we landed right at the margin, be happy.
1.92 kristaps 286: * If we are one step before the margin, temporarily
287: * move it one step LEFT and flag the rest of the line
288: * to be longer.
1.91 kristaps 289: */
1.129 kristaps 290: if (p->overstep >= -1) {
291: assert((int)maxvis + p->overstep >= 0);
1.174 schwarze 292: maxvis += (size_t)p->overstep;
1.92 kristaps 293: } else
1.129 kristaps 294: p->overstep = 0;
1.91 kristaps 295:
296: } else if (TERMP_DANGLE & p->flags)
297: return;
1.15 kristaps 298:
1.92 kristaps 299: /* Right-pad. */
1.174 schwarze 300: if (maxvis > vis +
301: ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
1.139 schwarze 302: p->viscol += maxvis - vis;
1.146 kristaps 303: (*p->advance)(p, maxvis - vis);
1.142 kristaps 304: vis += (maxvis - vis);
1.139 schwarze 305: } else { /* ...or newline break. */
1.146 kristaps 306: (*p->endline)(p);
1.139 schwarze 307: p->viscol = p->rmargin;
1.146 kristaps 308: (*p->advance)(p, p->rmargin);
1.91 kristaps 309: }
1.15 kristaps 310: }
311:
312:
1.71 kristaps 313: /*
314: * A newline only breaks an existing line; it won't assert vertical
315: * space. All data in the output buffer is flushed prior to the newline
316: * assertion.
317: */
318: void
319: term_newln(struct termp *p)
1.15 kristaps 320: {
321:
1.71 kristaps 322: p->flags |= TERMP_NOSPACE;
1.139 schwarze 323: if (0 == p->col && 0 == p->viscol) {
1.71 kristaps 324: p->flags &= ~TERMP_NOLPAD;
1.15 kristaps 325: return;
1.16 kristaps 326: }
1.71 kristaps 327: term_flushln(p);
328: p->flags &= ~TERMP_NOLPAD;
1.16 kristaps 329: }
330:
331:
1.71 kristaps 332: /*
333: * Asserts a vertical space (a full, empty line-break between lines).
334: * Note that if used twice, this will cause two blank spaces and so on.
335: * All data in the output buffer is flushed prior to the newline
336: * assertion.
337: */
338: void
339: term_vspace(struct termp *p)
1.16 kristaps 340: {
341:
1.62 kristaps 342: term_newln(p);
1.139 schwarze 343: p->viscol = 0;
1.146 kristaps 344: (*p->endline)(p);
1.16 kristaps 345: }
346:
347:
1.71 kristaps 348: static void
1.177 schwarze 349: numbered(struct termp *p, const char *word, size_t len)
350: {
1.186 kristaps 351: char c;
1.177 schwarze 352:
1.186 kristaps 353: if ('\0' != (c = mchars_num2char(word, len)))
354: encode(p, &c, 1);
1.177 schwarze 355: }
356:
357:
358: static void
1.184 kristaps 359: spec(struct termp *p, const char *word, size_t len)
1.17 kristaps 360: {
1.71 kristaps 361: const char *rhs;
362: size_t sz;
1.17 kristaps 363:
1.185 kristaps 364: rhs = mchars_spec2str(p->symtab, word, len, &sz);
1.125 kristaps 365: if (rhs)
366: encode(p, rhs, sz);
1.184 kristaps 367: else if (1 == len)
1.163 kristaps 368: encode(p, word, len);
1.94 kristaps 369: }
370:
371:
372: static void
1.125 kristaps 373: res(struct termp *p, const char *word, size_t len)
1.94 kristaps 374: {
375: const char *rhs;
376: size_t sz;
377:
1.185 kristaps 378: rhs = mchars_res2str(p->symtab, word, len, &sz);
1.125 kristaps 379: if (rhs)
380: encode(p, rhs, sz);
381: }
382:
383:
384: void
385: term_fontlast(struct termp *p)
386: {
387: enum termfont f;
388:
389: f = p->fontl;
390: p->fontl = p->fontq[p->fonti];
391: p->fontq[p->fonti] = f;
392: }
393:
394:
395: void
396: term_fontrepl(struct termp *p, enum termfont f)
397: {
398:
399: p->fontl = p->fontq[p->fonti];
400: p->fontq[p->fonti] = f;
401: }
402:
403:
404: void
405: term_fontpush(struct termp *p, enum termfont f)
406: {
407:
408: assert(p->fonti + 1 < 10);
409: p->fontl = p->fontq[p->fonti];
410: p->fontq[++p->fonti] = f;
411: }
412:
413:
414: const void *
415: term_fontq(struct termp *p)
416: {
417:
418: return(&p->fontq[p->fonti]);
419: }
420:
421:
422: enum termfont
423: term_fonttop(struct termp *p)
424: {
425:
426: return(p->fontq[p->fonti]);
427: }
428:
429:
430: void
431: term_fontpopq(struct termp *p, const void *key)
432: {
433:
434: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
435: p->fonti--;
436: assert(p->fonti >= 0);
437: }
1.94 kristaps 438:
1.125 kristaps 439:
440: void
441: term_fontpop(struct termp *p)
442: {
443:
444: assert(p->fonti);
445: p->fonti--;
1.17 kristaps 446: }
447:
448:
1.71 kristaps 449: /*
450: * Handle pwords, partial words, which may be either a single word or a
451: * phrase that cannot be broken down (such as a literal string). This
452: * handles word styling.
453: */
1.86 kristaps 454: void
455: term_word(struct termp *p, const char *word)
1.65 kristaps 456: {
1.183 kristaps 457: const char *seq;
1.184 kristaps 458: int sz;
1.124 kristaps 459: size_t ssz;
1.184 kristaps 460: enum mandoc_esc esc;
1.100 kristaps 461:
1.133 kristaps 462: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 463: if ( ! (TERMP_KEEP & p->flags)) {
464: if (TERMP_PREKEEP & p->flags)
465: p->flags |= TERMP_KEEP;
1.133 kristaps 466: bufferc(p, ' ');
1.151 schwarze 467: if (TERMP_SENTENCE & p->flags)
468: bufferc(p, ' ');
469: } else
470: bufferc(p, ASCII_NBRSP);
1.133 kristaps 471: }
1.65 kristaps 472:
1.71 kristaps 473: if ( ! (p->flags & TERMP_NONOSPACE))
474: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 475: else
476: p->flags |= TERMP_NOSPACE;
1.133 kristaps 477:
1.173 schwarze 478: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
1.65 kristaps 479:
1.184 kristaps 480: while ('\0' != *word) {
1.162 kristaps 481: if ((ssz = strcspn(word, "\\")) > 0)
482: encode(p, word, ssz);
1.124 kristaps 483:
1.178 kristaps 484: word += (int)ssz;
1.162 kristaps 485: if ('\\' != *word)
1.124 kristaps 486: continue;
487:
1.184 kristaps 488: word++;
489: esc = mandoc_escape(&word, &seq, &sz);
490: if (ESCAPE_ERROR == esc)
491: break;
1.124 kristaps 492:
1.184 kristaps 493: switch (esc) {
494: case (ESCAPE_NUMBERED):
495: numbered(p, seq, sz);
496: break;
497: case (ESCAPE_PREDEF):
498: res(p, seq, sz);
499: break;
500: case (ESCAPE_SPECIAL):
501: spec(p, seq, sz);
1.124 kristaps 502: break;
1.184 kristaps 503: case (ESCAPE_FONTBOLD):
1.125 kristaps 504: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 505: break;
1.184 kristaps 506: case (ESCAPE_FONTITALIC):
1.125 kristaps 507: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 508: break;
1.184 kristaps 509: case (ESCAPE_FONTROMAN):
1.125 kristaps 510: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 511: break;
1.184 kristaps 512: case (ESCAPE_FONTPREV):
1.125 kristaps 513: term_fontlast(p);
1.124 kristaps 514: break;
1.184 kristaps 515: case (ESCAPE_NOSPACE):
516: if ('\0' == *word)
517: p->flags |= TERMP_NOSPACE;
518: break;
1.124 kristaps 519: default:
520: break;
521: }
522: }
1.65 kristaps 523: }
524:
525:
1.71 kristaps 526: static void
1.125 kristaps 527: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 528: {
529:
1.125 kristaps 530: if (0 == p->maxcols)
531: p->maxcols = 1024;
532: while (sz >= p->maxcols)
533: p->maxcols <<= 2;
534:
1.187 ! kristaps 535: p->buf = mandoc_realloc(p->buf, sizeof(int) * p->maxcols);
1.51 kristaps 536: }
537:
1.79 kristaps 538:
539: static void
1.125 kristaps 540: bufferc(struct termp *p, char c)
541: {
542:
543: if (p->col + 1 >= p->maxcols)
544: adjbuf(p, p->col + 1);
545:
1.126 kristaps 546: p->buf[(int)p->col++] = c;
1.125 kristaps 547: }
548:
549:
550: static void
551: encode(struct termp *p, const char *word, size_t sz)
552: {
553: enum termfont f;
554: int i;
555:
556: /*
557: * Encode and buffer a string of characters. If the current
558: * font mode is unset, buffer directly, else encode then buffer
559: * character by character.
560: */
561:
1.147 kristaps 562: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.165 kristaps 563: if (p->col + sz >= p->maxcols)
564: adjbuf(p, p->col + sz);
1.187 ! kristaps 565: for (i = 0; i < (int)sz; i++)
! 566: p->buf[(int)p->col++] = word[i];
1.125 kristaps 567: return;
568: }
569:
1.165 kristaps 570: /* Pre-buffer, assuming worst-case. */
571:
572: if (p->col + 1 + (sz * 3) >= p->maxcols)
573: adjbuf(p, p->col + 1 + (sz * 3));
574:
1.125 kristaps 575: for (i = 0; i < (int)sz; i++) {
576: if ( ! isgraph((u_char)word[i])) {
1.165 kristaps 577: p->buf[(int)p->col++] = word[i];
1.125 kristaps 578: continue;
1.79 kristaps 579: }
1.125 kristaps 580:
581: if (TERMFONT_UNDER == f)
1.165 kristaps 582: p->buf[(int)p->col++] = '_';
1.125 kristaps 583: else
1.165 kristaps 584: p->buf[(int)p->col++] = word[i];
1.125 kristaps 585:
1.165 kristaps 586: p->buf[(int)p->col++] = 8;
587: p->buf[(int)p->col++] = word[i];
1.79 kristaps 588: }
589: }
1.106 kristaps 590:
591:
1.107 kristaps 592: size_t
1.149 kristaps 593: term_len(const struct termp *p, size_t sz)
594: {
595:
596: return((*p->width)(p, ' ') * sz);
597: }
598:
599:
600: size_t
601: term_strlen(const struct termp *p, const char *cp)
602: {
1.184 kristaps 603: size_t sz, rsz, i;
604: int ssz;
605: enum mandoc_esc esc;
1.171 kristaps 606: const char *seq, *rhs;
607:
1.184 kristaps 608: /*
609: * Account for escaped sequences within string length
610: * calculations. This follows the logic in term_word() as we
611: * must calculate the width of produced strings.
612: */
613:
614: sz = 0;
615: while ('\0' != *cp)
616: switch (*cp) {
617: case ('\\'):
618: ++cp;
619: esc = mandoc_escape(&cp, &seq, &ssz);
620: if (ESCAPE_ERROR == esc)
621: return(sz);
1.171 kristaps 622:
1.184 kristaps 623: switch (esc) {
624: case (ESCAPE_PREDEF):
1.185 kristaps 625: rhs = mchars_res2str
1.171 kristaps 626: (p->symtab, seq, ssz, &rsz);
627: break;
1.184 kristaps 628: case (ESCAPE_SPECIAL):
1.185 kristaps 629: rhs = mchars_spec2str
1.171 kristaps 630: (p->symtab, seq, ssz, &rsz);
631:
1.184 kristaps 632: if (ssz != 1 || rhs)
1.171 kristaps 633: break;
634:
635: rhs = seq;
636: rsz = ssz;
637: break;
638: default:
639: rhs = NULL;
640: break;
641: }
1.149 kristaps 642:
1.184 kristaps 643: if (NULL == rhs)
644: break;
645:
646: for (i = 0; i < rsz; i++)
647: sz += (*p->width)(p, *rhs++);
648: break;
649: case (ASCII_NBRSP):
1.176 kristaps 650: sz += (*p->width)(p, ' ');
651: cp++;
1.184 kristaps 652: break;
653: case (ASCII_HYPH):
1.176 kristaps 654: sz += (*p->width)(p, '-');
655: cp++;
1.184 kristaps 656: break;
657: default:
1.171 kristaps 658: sz += (*p->width)(p, *cp++);
1.184 kristaps 659: break;
660: }
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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