Annotation of src/usr.bin/mandoc/term.c, Revision 1.64
1.64 ! schwarze 1: /* $Id: term.c,v 1.63 2012/05/27 01:01:24 schwarze Exp $ */
1.1 kristaps 2: /*
1.59 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.63 schwarze 4: * Copyright (c) 2010, 2011, 2012 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.2 schwarze 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: *
1.2 schwarze 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: */
1.20 schwarze 18: #include <sys/types.h>
19:
1.1 kristaps 20: #include <assert.h>
1.20 schwarze 21: #include <ctype.h>
1.36 schwarze 22: #include <stdint.h>
1.1 kristaps 23: #include <stdio.h>
24: #include <stdlib.h>
25: #include <string.h>
26:
1.34 schwarze 27: #include "mandoc.h"
1.16 schwarze 28: #include "out.h"
1.1 kristaps 29: #include "term.h"
1.16 schwarze 30: #include "main.h"
1.1 kristaps 31:
1.64 ! schwarze 32: static size_t cond_width(const struct termp *, int, int *);
1.59 schwarze 33: static void adjbuf(struct termp *p, int);
34: static void bufferc(struct termp *, char);
35: static void encode(struct termp *, const char *, size_t);
36: static void encode1(struct termp *, int);
1.1 kristaps 37:
1.37 schwarze 38: void
39: term_free(struct termp *p)
1.1 kristaps 40: {
41:
1.37 schwarze 42: if (p->buf)
43: free(p->buf);
44: if (p->symtab)
1.59 schwarze 45: mchars_free(p->symtab);
1.37 schwarze 46:
47: free(p);
1.1 kristaps 48: }
49:
50:
1.13 schwarze 51: void
1.37 schwarze 52: term_begin(struct termp *p, term_margin head,
53: term_margin foot, const void *arg)
1.1 kristaps 54: {
55:
1.37 schwarze 56: p->headf = head;
57: p->footf = foot;
58: p->argf = arg;
59: (*p->begin)(p);
1.1 kristaps 60: }
61:
62:
1.37 schwarze 63: void
64: term_end(struct termp *p)
1.1 kristaps 65: {
66:
1.37 schwarze 67: (*p->end)(p);
1.1 kristaps 68: }
69:
70: /*
71: * Flush a line of text. A "line" is loosely defined as being something
72: * that should be followed by a newline, regardless of whether it's
73: * broken apart by newlines getting there. A line can also be a
1.27 schwarze 74: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
75: * not have a trailing newline.
1.1 kristaps 76: *
1.27 schwarze 77: * The following flags may be specified:
1.1 kristaps 78: *
79: * - TERMP_NOBREAK: this is the most important and is used when making
1.61 schwarze 80: * columns. In short: don't print a newline and instead expect the
81: * next call to do the padding up to the start of the next column.
1.1 kristaps 82: *
1.61 schwarze 83: * - TERMP_TWOSPACE: make sure there is room for at least two space
84: * characters of padding. Otherwise, rather break the line.
1.9 schwarze 85: *
1.6 schwarze 86: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
87: * the line is overrun, and don't pad-right if it's underrun.
88: *
89: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
1.61 schwarze 90: * overrunning, instead save the position and continue at that point
1.6 schwarze 91: * when the next invocation.
1.1 kristaps 92: *
93: * In-line line breaking:
94: *
95: * If TERMP_NOBREAK is specified and the line overruns the right
96: * margin, it will break and pad-right to the right margin after
97: * writing. If maxrmargin is violated, it will break and continue
1.19 schwarze 98: * writing from the right-margin, which will lead to the above scenario
99: * upon exit. Otherwise, the line will break at the right margin.
1.1 kristaps 100: */
101: void
102: term_flushln(struct termp *p)
103: {
1.19 schwarze 104: int i; /* current input position in p->buf */
105: size_t vis; /* current visual position on output */
106: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 107: size_t vend; /* end of word visual position on output */
1.19 schwarze 108: size_t bp; /* visual right border position */
1.51 schwarze 109: size_t dv; /* temporary for visual pos calculations */
1.42 schwarze 110: int j; /* temporary loop index for p->buf */
111: int jhy; /* last hyph before overflow w/r/t j */
112: size_t maxvis; /* output position of visible boundary */
113: size_t mmax; /* used in calculating bp */
1.1 kristaps 114:
115: /*
116: * First, establish the maximum columns of "visible" content.
117: * This is usually the difference between the right-margin and
118: * an indentation, but can be, for tagged lists or columns, a
1.19 schwarze 119: * small set of values.
1.1 kristaps 120: */
1.54 schwarze 121: assert (p->rmargin >= p->offset);
1.53 schwarze 122: dv = p->rmargin - p->offset;
123: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
124: dv = p->maxrmargin - p->offset;
125: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.9 schwarze 126:
1.1 kristaps 127: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.19 schwarze 128:
1.33 schwarze 129: /*
1.61 schwarze 130: * Calculate the required amount of padding.
1.33 schwarze 131: */
1.61 schwarze 132: vbl = p->offset + p->overstep > p->viscol ?
133: p->offset + p->overstep - p->viscol : 0;
1.33 schwarze 134:
1.53 schwarze 135: vis = vend = 0;
136: i = 0;
1.19 schwarze 137:
1.59 schwarze 138: while (i < p->col) {
1.22 schwarze 139: /*
1.42 schwarze 140: * Handle literal tab characters: collapse all
141: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 142: */
1.59 schwarze 143: while (i < p->col && '\t' == p->buf[i]) {
1.42 schwarze 144: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.30 schwarze 145: vbl += vend - vis;
146: vis = vend;
1.49 schwarze 147: i++;
1.30 schwarze 148: }
1.22 schwarze 149:
1.1 kristaps 150: /*
151: * Count up visible word characters. Control sequences
152: * (starting with the CSI) aren't counted. A space
153: * generates a non-printing word, which is valid (the
154: * space is printed according to regular spacing rules).
155: */
156:
1.59 schwarze 157: for (j = i, jhy = 0; j < p->col; j++) {
1.30 schwarze 158: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.1 kristaps 159: break;
1.42 schwarze 160:
161: /* Back over the the last printed character. */
162: if (8 == p->buf[j]) {
163: assert(j);
164: vend -= (*p->width)(p, p->buf[j - 1]);
165: continue;
166: }
167:
168: /* Regular word. */
169: /* Break at the hyphen point if we overrun. */
170: if (vend > vis && vend < bp &&
171: ASCII_HYPH == p->buf[j])
172: jhy = j;
173:
174: vend += (*p->width)(p, p->buf[j]);
1.1 kristaps 175: }
176:
177: /*
1.5 schwarze 178: * Find out whether we would exceed the right margin.
1.33 schwarze 179: * If so, break to the next line.
1.5 schwarze 180: */
1.33 schwarze 181: if (vend > bp && 0 == jhy && vis > 0) {
1.22 schwarze 182: vend -= vis;
1.37 schwarze 183: (*p->endline)(p);
1.62 schwarze 184: p->viscol = 0;
1.5 schwarze 185: if (TERMP_NOBREAK & p->flags) {
1.62 schwarze 186: vbl = p->rmargin;
1.22 schwarze 187: vend += p->rmargin - p->offset;
1.62 schwarze 188: } else
1.33 schwarze 189: vbl = p->offset;
190:
1.26 schwarze 191: /* Remove the p->overstep width. */
1.33 schwarze 192:
1.53 schwarze 193: bp += (size_t)p->overstep;
1.26 schwarze 194: p->overstep = 0;
1.1 kristaps 195: }
1.30 schwarze 196:
1.33 schwarze 197: /* Write out the [remaining] word. */
1.59 schwarze 198: for ( ; i < p->col; i++) {
1.25 schwarze 199: if (vend > bp && jhy > 0 && i > jhy)
1.30 schwarze 200: break;
201: if ('\t' == p->buf[i])
1.1 kristaps 202: break;
1.22 schwarze 203: if (' ' == p->buf[i]) {
1.46 schwarze 204: j = i;
205: while (' ' == p->buf[i])
1.33 schwarze 206: i++;
1.53 schwarze 207: dv = (size_t)(i - j) * (*p->width)(p, ' ');
1.51 schwarze 208: vbl += dv;
209: vend += dv;
1.22 schwarze 210: break;
211: }
1.33 schwarze 212: if (ASCII_NBRSP == p->buf[i]) {
1.42 schwarze 213: vbl += (*p->width)(p, ' ');
1.33 schwarze 214: continue;
215: }
216:
217: /*
218: * Now we definitely know there will be
219: * printable characters to output,
220: * so write preceding white space now.
221: */
222: if (vbl) {
1.37 schwarze 223: (*p->advance)(p, vbl);
1.33 schwarze 224: p->viscol += vbl;
225: vbl = 0;
226: }
1.35 schwarze 227:
1.42 schwarze 228: if (ASCII_HYPH == p->buf[i]) {
1.37 schwarze 229: (*p->letter)(p, '-');
1.42 schwarze 230: p->viscol += (*p->width)(p, '-');
1.61 schwarze 231: continue;
232: }
233:
234: (*p->letter)(p, p->buf[i]);
235: if (8 == p->buf[i])
236: p->viscol -= (*p->width)(p, p->buf[i-1]);
237: else
1.42 schwarze 238: p->viscol += (*p->width)(p, p->buf[i]);
1.1 kristaps 239: }
1.22 schwarze 240: vis = vend;
1.1 kristaps 241: }
1.48 schwarze 242:
243: /*
244: * If there was trailing white space, it was not printed;
245: * so reset the cursor position accordingly.
246: */
1.61 schwarze 247: if (vis)
248: vis -= vbl;
1.18 schwarze 249:
1.9 schwarze 250: p->col = 0;
1.26 schwarze 251: p->overstep = 0;
1.1 kristaps 252:
1.9 schwarze 253: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 254: p->viscol = 0;
1.37 schwarze 255: (*p->endline)(p);
1.1 kristaps 256: return;
257: }
258:
1.9 schwarze 259: if (TERMP_HANG & p->flags) {
260: /* We need one blank after the tag. */
1.53 schwarze 261: p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
1.9 schwarze 262:
263: /*
264: * Behave exactly the same way as groff:
265: * If we have overstepped the margin, temporarily move
266: * it to the right and flag the rest of the line to be
267: * shorter.
268: * If we landed right at the margin, be happy.
269: * If we are one step before the margin, temporarily
270: * move it one step LEFT and flag the rest of the line
271: * to be longer.
272: */
1.61 schwarze 273: if (p->overstep < -1)
1.26 schwarze 274: p->overstep = 0;
1.61 schwarze 275: return;
1.9 schwarze 276:
277: } else if (TERMP_DANGLE & p->flags)
278: return;
1.1 kristaps 279:
1.61 schwarze 280: /* If the column was overrun, break the line. */
281: if (maxvis <= vis +
1.53 schwarze 282: ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
1.37 schwarze 283: (*p->endline)(p);
1.61 schwarze 284: p->viscol = 0;
1.9 schwarze 285: }
1.1 kristaps 286: }
287:
288:
289: /*
290: * A newline only breaks an existing line; it won't assert vertical
291: * space. All data in the output buffer is flushed prior to the newline
292: * assertion.
293: */
294: void
295: term_newln(struct termp *p)
296: {
297:
298: p->flags |= TERMP_NOSPACE;
1.61 schwarze 299: if (p->col || p->viscol)
300: term_flushln(p);
1.1 kristaps 301: }
302:
303:
304: /*
305: * Asserts a vertical space (a full, empty line-break between lines).
306: * Note that if used twice, this will cause two blank spaces and so on.
307: * All data in the output buffer is flushed prior to the newline
308: * assertion.
309: */
310: void
311: term_vspace(struct termp *p)
312: {
313:
314: term_newln(p);
1.29 schwarze 315: p->viscol = 0;
1.63 schwarze 316: if (0 < p->skipvsp)
317: p->skipvsp--;
318: else
319: (*p->endline)(p);
1.1 kristaps 320: }
321:
1.20 schwarze 322: void
323: term_fontlast(struct termp *p)
324: {
325: enum termfont f;
1.11 schwarze 326:
1.20 schwarze 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;
1.1 kristaps 339: }
340:
341:
1.20 schwarze 342: void
343: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 344: {
1.7 schwarze 345:
1.20 schwarze 346: assert(p->fonti + 1 < 10);
347: p->fontl = p->fontq[p->fonti];
348: p->fontq[++p->fonti] = f;
349: }
1.1 kristaps 350:
351:
1.20 schwarze 352: const void *
353: term_fontq(struct termp *p)
354: {
1.1 kristaps 355:
1.20 schwarze 356: return(&p->fontq[p->fonti]);
357: }
1.1 kristaps 358:
359:
1.20 schwarze 360: enum termfont
361: term_fonttop(struct termp *p)
362: {
1.1 kristaps 363:
1.20 schwarze 364: return(p->fontq[p->fonti]);
365: }
1.7 schwarze 366:
367:
1.20 schwarze 368: void
369: term_fontpopq(struct termp *p, const void *key)
370: {
1.1 kristaps 371:
1.20 schwarze 372: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
373: p->fonti--;
374: assert(p->fonti >= 0);
375: }
1.1 kristaps 376:
377:
1.20 schwarze 378: void
379: term_fontpop(struct termp *p)
380: {
1.1 kristaps 381:
1.20 schwarze 382: assert(p->fonti);
383: p->fonti--;
1.1 kristaps 384: }
385:
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: */
1.7 schwarze 391: void
392: term_word(struct termp *p, const char *word)
1.1 kristaps 393: {
1.59 schwarze 394: const char *seq, *cp;
395: char c;
396: int sz, uc;
1.20 schwarze 397: size_t ssz;
1.59 schwarze 398: enum mandoc_esc esc;
1.1 kristaps 399:
1.31 schwarze 400: if ( ! (TERMP_NOSPACE & p->flags)) {
1.40 schwarze 401: if ( ! (TERMP_KEEP & p->flags)) {
402: if (TERMP_PREKEEP & p->flags)
403: p->flags |= TERMP_KEEP;
1.31 schwarze 404: bufferc(p, ' ');
1.40 schwarze 405: if (TERMP_SENTENCE & p->flags)
406: bufferc(p, ' ');
407: } else
408: bufferc(p, ASCII_NBRSP);
1.31 schwarze 409: }
1.1 kristaps 410:
411: if ( ! (p->flags & TERMP_NONOSPACE))
412: p->flags &= ~TERMP_NOSPACE;
1.46 schwarze 413: else
414: p->flags |= TERMP_NOSPACE;
1.1 kristaps 415:
1.52 schwarze 416: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
1.31 schwarze 417:
1.59 schwarze 418: while ('\0' != *word) {
1.64 ! schwarze 419: if ('\\' != *word) {
! 420: if (TERMP_SKIPCHAR & p->flags) {
! 421: p->flags &= ~TERMP_SKIPCHAR;
! 422: word++;
! 423: continue;
! 424: }
! 425: ssz = strcspn(word, "\\");
1.45 schwarze 426: encode(p, word, ssz);
1.64 ! schwarze 427: word += (int)ssz;
1.20 schwarze 428: continue;
1.64 ! schwarze 429: }
1.20 schwarze 430:
1.59 schwarze 431: word++;
432: esc = mandoc_escape(&word, &seq, &sz);
433: if (ESCAPE_ERROR == esc)
434: break;
435:
436: if (TERMENC_ASCII != p->enc)
437: switch (esc) {
438: case (ESCAPE_UNICODE):
439: uc = mchars_num2uc(seq + 1, sz - 1);
440: if ('\0' == uc)
441: break;
442: encode1(p, uc);
443: continue;
444: case (ESCAPE_SPECIAL):
445: uc = mchars_spec2cp(p->symtab, seq, sz);
446: if (uc <= 0)
447: break;
448: encode1(p, uc);
449: continue;
450: default:
451: break;
452: }
1.20 schwarze 453:
1.59 schwarze 454: switch (esc) {
455: case (ESCAPE_UNICODE):
456: encode1(p, '?');
1.56 schwarze 457: break;
1.59 schwarze 458: case (ESCAPE_NUMBERED):
459: c = mchars_num2char(seq, sz);
460: if ('\0' != c)
461: encode(p, &c, 1);
1.20 schwarze 462: break;
1.59 schwarze 463: case (ESCAPE_SPECIAL):
464: cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
465: if (NULL != cp)
466: encode(p, cp, ssz);
467: else if (1 == ssz)
468: encode(p, seq, sz);
1.20 schwarze 469: break;
1.59 schwarze 470: case (ESCAPE_FONTBOLD):
1.20 schwarze 471: term_fontrepl(p, TERMFONT_BOLD);
472: break;
1.59 schwarze 473: case (ESCAPE_FONTITALIC):
1.20 schwarze 474: term_fontrepl(p, TERMFONT_UNDER);
475: break;
1.59 schwarze 476: case (ESCAPE_FONT):
477: /* FALLTHROUGH */
478: case (ESCAPE_FONTROMAN):
1.20 schwarze 479: term_fontrepl(p, TERMFONT_NONE);
480: break;
1.59 schwarze 481: case (ESCAPE_FONTPREV):
1.20 schwarze 482: term_fontlast(p);
483: break;
1.59 schwarze 484: case (ESCAPE_NOSPACE):
1.64 ! schwarze 485: if (TERMP_SKIPCHAR & p->flags)
! 486: p->flags &= ~TERMP_SKIPCHAR;
! 487: else if ('\0' == *word)
1.59 schwarze 488: p->flags |= TERMP_NOSPACE;
489: break;
1.64 ! schwarze 490: case (ESCAPE_SKIPCHAR):
! 491: p->flags |= TERMP_SKIPCHAR;
! 492: break;
1.20 schwarze 493: default:
494: break;
495: }
496: }
1.1 kristaps 497: }
498:
499: static void
1.59 schwarze 500: adjbuf(struct termp *p, int sz)
1.1 kristaps 501: {
502:
1.20 schwarze 503: if (0 == p->maxcols)
504: p->maxcols = 1024;
505: while (sz >= p->maxcols)
506: p->maxcols <<= 2;
507:
1.59 schwarze 508: p->buf = mandoc_realloc
509: (p->buf, sizeof(int) * (size_t)p->maxcols);
1.1 kristaps 510: }
511:
1.4 schwarze 512: static void
1.20 schwarze 513: bufferc(struct termp *p, char c)
514: {
515:
516: if (p->col + 1 >= p->maxcols)
517: adjbuf(p, p->col + 1);
518:
1.59 schwarze 519: p->buf[p->col++] = c;
1.20 schwarze 520: }
521:
1.59 schwarze 522: /*
523: * See encode().
524: * Do this for a single (probably unicode) value.
525: * Does not check for non-decorated glyphs.
526: */
527: static void
528: encode1(struct termp *p, int c)
529: {
530: enum termfont f;
531:
1.64 ! schwarze 532: if (TERMP_SKIPCHAR & p->flags) {
! 533: p->flags &= ~TERMP_SKIPCHAR;
! 534: return;
! 535: }
! 536:
1.59 schwarze 537: if (p->col + 4 >= p->maxcols)
538: adjbuf(p, p->col + 4);
539:
540: f = term_fonttop(p);
541:
542: if (TERMFONT_NONE == f) {
543: p->buf[p->col++] = c;
544: return;
545: } else if (TERMFONT_UNDER == f) {
546: p->buf[p->col++] = '_';
547: } else
548: p->buf[p->col++] = c;
549:
550: p->buf[p->col++] = 8;
551: p->buf[p->col++] = c;
552: }
1.20 schwarze 553:
554: static void
555: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 556: {
1.20 schwarze 557: enum termfont f;
1.59 schwarze 558: int i, len;
559:
1.64 ! schwarze 560: if (TERMP_SKIPCHAR & p->flags) {
! 561: p->flags &= ~TERMP_SKIPCHAR;
! 562: return;
! 563: }
! 564:
1.59 schwarze 565: /* LINTED */
566: len = sz;
1.20 schwarze 567:
568: /*
569: * Encode and buffer a string of characters. If the current
570: * font mode is unset, buffer directly, else encode then buffer
571: * character by character.
572: */
573:
1.38 schwarze 574: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.59 schwarze 575: if (p->col + len >= p->maxcols)
576: adjbuf(p, p->col + len);
577: for (i = 0; i < len; i++)
578: p->buf[p->col++] = word[i];
1.20 schwarze 579: return;
580: }
581:
1.46 schwarze 582: /* Pre-buffer, assuming worst-case. */
583:
1.59 schwarze 584: if (p->col + 1 + (len * 3) >= p->maxcols)
585: adjbuf(p, p->col + 1 + (len * 3));
1.46 schwarze 586:
1.59 schwarze 587: for (i = 0; i < len; i++) {
1.60 schwarze 588: if (ASCII_HYPH != word[i] &&
589: ! isgraph((unsigned char)word[i])) {
1.59 schwarze 590: p->buf[p->col++] = word[i];
1.20 schwarze 591: continue;
1.4 schwarze 592: }
1.20 schwarze 593:
594: if (TERMFONT_UNDER == f)
1.59 schwarze 595: p->buf[p->col++] = '_';
1.60 schwarze 596: else if (ASCII_HYPH == word[i])
597: p->buf[p->col++] = '-';
1.20 schwarze 598: else
1.59 schwarze 599: p->buf[p->col++] = word[i];
1.20 schwarze 600:
1.59 schwarze 601: p->buf[p->col++] = 8;
602: p->buf[p->col++] = word[i];
1.4 schwarze 603: }
604: }
1.16 schwarze 605:
606: size_t
1.39 schwarze 607: term_len(const struct termp *p, size_t sz)
608: {
609:
610: return((*p->width)(p, ' ') * sz);
611: }
612:
1.64 ! schwarze 613: static size_t
! 614: cond_width(const struct termp *p, int c, int *skip)
! 615: {
! 616:
! 617: if (*skip) {
! 618: (*skip) = 0;
! 619: return(0);
! 620: } else
! 621: return((*p->width)(p, c));
! 622: }
1.39 schwarze 623:
624: size_t
625: term_strlen(const struct termp *p, const char *cp)
626: {
1.59 schwarze 627: size_t sz, rsz, i;
1.64 ! schwarze 628: int ssz, skip, c;
1.50 schwarze 629: const char *seq, *rhs;
1.59 schwarze 630: enum mandoc_esc esc;
631: static const char rej[] = { '\\', ASCII_HYPH, ASCII_NBRSP, '\0' };
632:
633: /*
634: * Account for escaped sequences within string length
635: * calculations. This follows the logic in term_word() as we
636: * must calculate the width of produced strings.
637: */
638:
639: sz = 0;
1.64 ! schwarze 640: skip = 0;
1.59 schwarze 641: while ('\0' != *cp) {
642: rsz = strcspn(cp, rej);
643: for (i = 0; i < rsz; i++)
1.64 ! schwarze 644: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 645:
646: c = 0;
647: switch (*cp) {
648: case ('\\'):
649: cp++;
650: esc = mandoc_escape(&cp, &seq, &ssz);
651: if (ESCAPE_ERROR == esc)
652: return(sz);
653:
654: if (TERMENC_ASCII != p->enc)
655: switch (esc) {
656: case (ESCAPE_UNICODE):
657: c = mchars_num2uc
658: (seq + 1, ssz - 1);
659: if ('\0' == c)
660: break;
1.64 ! schwarze 661: sz += cond_width(p, c, &skip);
1.59 schwarze 662: continue;
663: case (ESCAPE_SPECIAL):
664: c = mchars_spec2cp
665: (p->symtab, seq, ssz);
666: if (c <= 0)
667: break;
1.64 ! schwarze 668: sz += cond_width(p, c, &skip);
1.59 schwarze 669: continue;
670: default:
671: break;
672: }
673:
674: rhs = NULL;
1.50 schwarze 675:
1.59 schwarze 676: switch (esc) {
677: case (ESCAPE_UNICODE):
1.64 ! schwarze 678: sz += cond_width(p, '?', &skip);
1.59 schwarze 679: break;
680: case (ESCAPE_NUMBERED):
681: c = mchars_num2char(seq, ssz);
682: if ('\0' != c)
1.64 ! schwarze 683: sz += cond_width(p, c, &skip);
1.50 schwarze 684: break;
1.59 schwarze 685: case (ESCAPE_SPECIAL):
686: rhs = mchars_spec2str
1.50 schwarze 687: (p->symtab, seq, ssz, &rsz);
688:
1.59 schwarze 689: if (ssz != 1 || rhs)
1.50 schwarze 690: break;
691:
692: rhs = seq;
693: rsz = ssz;
694: break;
1.64 ! schwarze 695: case (ESCAPE_SKIPCHAR):
! 696: skip = 1;
! 697: break;
1.50 schwarze 698: default:
699: break;
700: }
1.39 schwarze 701:
1.59 schwarze 702: if (NULL == rhs)
703: break;
704:
1.64 ! schwarze 705: if (skip) {
! 706: skip = 0;
! 707: break;
! 708: }
! 709:
1.59 schwarze 710: for (i = 0; i < rsz; i++)
711: sz += (*p->width)(p, *rhs++);
712: break;
713: case (ASCII_NBRSP):
1.64 ! schwarze 714: sz += cond_width(p, ' ', &skip);
1.55 schwarze 715: cp++;
1.59 schwarze 716: break;
717: case (ASCII_HYPH):
1.64 ! schwarze 718: sz += cond_width(p, '-', &skip);
1.55 schwarze 719: cp++;
1.59 schwarze 720: break;
721: default:
722: break;
723: }
724: }
1.39 schwarze 725:
726: return(sz);
727: }
728:
1.44 schwarze 729: /* ARGSUSED */
1.39 schwarze 730: size_t
731: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 732: {
733: double r;
734:
735: switch (su->unit) {
736: case (SCALE_CM):
737: r = su->scale * 2;
738: break;
739: case (SCALE_IN):
740: r = su->scale * 6;
741: break;
742: case (SCALE_PC):
743: r = su->scale;
744: break;
745: case (SCALE_PT):
746: r = su->scale / 8;
747: break;
748: case (SCALE_MM):
749: r = su->scale / 1000;
750: break;
751: case (SCALE_VS):
752: r = su->scale;
753: break;
754: default:
755: r = su->scale - 1;
756: break;
757: }
758:
759: if (r < 0.0)
760: r = 0.0;
761: return(/* LINTED */(size_t)
762: r);
763: }
764:
765: size_t
1.39 schwarze 766: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 767: {
1.44 schwarze 768: double v;
1.16 schwarze 769:
1.44 schwarze 770: v = ((*p->hspan)(p, su));
771: if (v < 0.0)
772: v = 0.0;
773: return((size_t) /* LINTED */
774: v);
1.16 schwarze 775: }
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