Annotation of src/usr.bin/mandoc/term.c, Revision 1.90
1.90 ! schwarze 1: /* $OpenBSD: term.c,v 1.89 2014/10/26 17:11:18 schwarze Exp $ */
1.1 kristaps 2: /*
1.59 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.77 schwarze 4: * Copyright (c) 2010-2014 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>
1.1 kristaps 22: #include <stdio.h>
23: #include <stdlib.h>
24: #include <string.h>
25:
1.34 schwarze 26: #include "mandoc.h"
1.79 schwarze 27: #include "mandoc_aux.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 *);
1.71 schwarze 33: static void adjbuf(struct termp *p, size_t);
1.59 schwarze 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:
1.83 schwarze 38:
1.37 schwarze 39: void
40: term_free(struct termp *p)
1.1 kristaps 41: {
42:
1.37 schwarze 43: if (p->buf)
44: free(p->buf);
45: if (p->symtab)
1.59 schwarze 46: mchars_free(p->symtab);
1.37 schwarze 47:
48: free(p);
1.1 kristaps 49: }
50:
1.13 schwarze 51: void
1.83 schwarze 52: term_begin(struct termp *p, term_margin head,
1.37 schwarze 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:
1.37 schwarze 62: void
63: term_end(struct termp *p)
1.1 kristaps 64: {
65:
1.37 schwarze 66: (*p->end)(p);
1.1 kristaps 67: }
68:
69: /*
1.82 schwarze 70: * Flush a chunk of text. By default, break the output line each time
71: * the right margin is reached, and continue output on the next line
72: * at the same offset as the chunk itself. By default, also break the
73: * output line at the end of the chunk.
1.27 schwarze 74: * The following flags may be specified:
1.1 kristaps 75: *
1.82 schwarze 76: * - TERMP_NOBREAK: Do not break the output line at the right margin,
77: * but only at the max right margin. Also, do not break the output
78: * line at the end of the chunk, such that the next call can pad to
79: * the next column. However, if less than p->trailspace blanks,
80: * which can be 0, 1, or 2, remain to the right margin, the line
81: * will be broken.
82: * - TERMP_BRIND: If the chunk does not fit and the output line has
83: * to be broken, start the next line at the right margin instead
84: * of at the offset. Used together with TERMP_NOBREAK for the tags
85: * in various kinds of tagged lists.
86: * - TERMP_DANGLE: Do not break the output line at the right margin,
87: * append the next chunk after it even if this one is too long.
88: * To be used together with TERMP_NOBREAK.
89: * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
90: * the next chunk if this column is not full.
1.1 kristaps 91: */
92: void
93: term_flushln(struct termp *p)
94: {
1.71 schwarze 95: size_t i; /* current input position in p->buf */
1.66 schwarze 96: int ntab; /* number of tabs to prepend */
1.19 schwarze 97: size_t vis; /* current visual position on output */
98: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 99: size_t vend; /* end of word visual position on output */
1.19 schwarze 100: size_t bp; /* visual right border position */
1.51 schwarze 101: size_t dv; /* temporary for visual pos calculations */
1.71 schwarze 102: size_t j; /* temporary loop index for p->buf */
103: size_t jhy; /* last hyph before overflow w/r/t j */
1.42 schwarze 104: size_t maxvis; /* output position of visible boundary */
105: size_t mmax; /* used in calculating bp */
1.1 kristaps 106:
107: /*
108: * First, establish the maximum columns of "visible" content.
109: * This is usually the difference between the right-margin and
110: * an indentation, but can be, for tagged lists or columns, a
1.73 schwarze 111: * small set of values.
112: *
113: * The following unsigned-signed subtractions look strange,
114: * but they are actually correct. If the int p->overstep
115: * is negative, it gets sign extended. Subtracting that
116: * very large size_t effectively adds a small number to dv.
1.1 kristaps 117: */
1.54 schwarze 118: assert (p->rmargin >= p->offset);
1.53 schwarze 119: dv = p->rmargin - p->offset;
120: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
121: dv = p->maxrmargin - p->offset;
122: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.9 schwarze 123:
1.1 kristaps 124: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.19 schwarze 125:
1.33 schwarze 126: /*
1.61 schwarze 127: * Calculate the required amount of padding.
1.33 schwarze 128: */
1.61 schwarze 129: vbl = p->offset + p->overstep > p->viscol ?
130: p->offset + p->overstep - p->viscol : 0;
1.33 schwarze 131:
1.53 schwarze 132: vis = vend = 0;
133: i = 0;
1.19 schwarze 134:
1.59 schwarze 135: while (i < p->col) {
1.22 schwarze 136: /*
1.42 schwarze 137: * Handle literal tab characters: collapse all
138: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 139: */
1.66 schwarze 140: ntab = 0;
1.59 schwarze 141: while (i < p->col && '\t' == p->buf[i]) {
1.42 schwarze 142: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.30 schwarze 143: vbl += vend - vis;
144: vis = vend;
1.66 schwarze 145: ntab++;
1.49 schwarze 146: i++;
1.30 schwarze 147: }
1.22 schwarze 148:
1.1 kristaps 149: /*
150: * Count up visible word characters. Control sequences
151: * (starting with the CSI) aren't counted. A space
152: * generates a non-printing word, which is valid (the
153: * space is printed according to regular spacing rules).
154: */
155:
1.59 schwarze 156: for (j = i, jhy = 0; j < p->col; j++) {
1.69 schwarze 157: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.1 kristaps 158: break;
1.42 schwarze 159:
160: /* Back over the the last printed character. */
161: if (8 == p->buf[j]) {
162: assert(j);
163: vend -= (*p->width)(p, p->buf[j - 1]);
164: continue;
165: }
166:
167: /* Regular word. */
168: /* Break at the hyphen point if we overrun. */
1.83 schwarze 169: if (vend > vis && vend < bp &&
1.77 schwarze 170: (ASCII_HYPH == p->buf[j] ||
171: ASCII_BREAK == p->buf[j]))
1.42 schwarze 172: jhy = j;
173:
1.78 schwarze 174: /*
175: * Hyphenation now decided, put back a real
176: * hyphen such that we get the correct width.
177: */
178: if (ASCII_HYPH == p->buf[j])
179: p->buf[j] = '-';
180:
1.42 schwarze 181: vend += (*p->width)(p, p->buf[j]);
1.1 kristaps 182: }
183:
184: /*
1.5 schwarze 185: * Find out whether we would exceed the right margin.
1.33 schwarze 186: * If so, break to the next line.
1.5 schwarze 187: */
1.33 schwarze 188: if (vend > bp && 0 == jhy && vis > 0) {
1.22 schwarze 189: vend -= vis;
1.37 schwarze 190: (*p->endline)(p);
1.62 schwarze 191: p->viscol = 0;
1.82 schwarze 192: if (TERMP_BRIND & p->flags) {
1.62 schwarze 193: vbl = p->rmargin;
1.22 schwarze 194: vend += p->rmargin - p->offset;
1.62 schwarze 195: } else
1.33 schwarze 196: vbl = p->offset;
1.66 schwarze 197:
198: /* use pending tabs on the new line */
199:
200: if (0 < ntab)
201: vbl += ntab * p->tabwidth;
1.33 schwarze 202:
1.73 schwarze 203: /*
204: * Remove the p->overstep width.
205: * Again, if p->overstep is negative,
206: * sign extension does the right thing.
207: */
1.33 schwarze 208:
1.53 schwarze 209: bp += (size_t)p->overstep;
1.26 schwarze 210: p->overstep = 0;
1.1 kristaps 211: }
1.30 schwarze 212:
1.33 schwarze 213: /* Write out the [remaining] word. */
1.59 schwarze 214: for ( ; i < p->col; i++) {
1.25 schwarze 215: if (vend > bp && jhy > 0 && i > jhy)
1.30 schwarze 216: break;
217: if ('\t' == p->buf[i])
1.1 kristaps 218: break;
1.22 schwarze 219: if (' ' == p->buf[i]) {
1.46 schwarze 220: j = i;
1.88 schwarze 221: while (i < p->col && ' ' == p->buf[i])
1.33 schwarze 222: i++;
1.71 schwarze 223: dv = (i - j) * (*p->width)(p, ' ');
1.51 schwarze 224: vbl += dv;
225: vend += dv;
1.22 schwarze 226: break;
227: }
1.33 schwarze 228: if (ASCII_NBRSP == p->buf[i]) {
1.42 schwarze 229: vbl += (*p->width)(p, ' ');
1.33 schwarze 230: continue;
231: }
1.77 schwarze 232: if (ASCII_BREAK == p->buf[i])
233: continue;
1.33 schwarze 234:
235: /*
236: * Now we definitely know there will be
237: * printable characters to output,
238: * so write preceding white space now.
239: */
240: if (vbl) {
1.37 schwarze 241: (*p->advance)(p, vbl);
1.33 schwarze 242: p->viscol += vbl;
243: vbl = 0;
1.61 schwarze 244: }
245:
246: (*p->letter)(p, p->buf[i]);
247: if (8 == p->buf[i])
248: p->viscol -= (*p->width)(p, p->buf[i-1]);
1.83 schwarze 249: else
1.42 schwarze 250: p->viscol += (*p->width)(p, p->buf[i]);
1.1 kristaps 251: }
1.22 schwarze 252: vis = vend;
1.1 kristaps 253: }
1.48 schwarze 254:
255: /*
256: * If there was trailing white space, it was not printed;
257: * so reset the cursor position accordingly.
258: */
1.61 schwarze 259: if (vis)
260: vis -= vbl;
1.18 schwarze 261:
1.9 schwarze 262: p->col = 0;
1.26 schwarze 263: p->overstep = 0;
1.1 kristaps 264:
1.9 schwarze 265: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 266: p->viscol = 0;
1.37 schwarze 267: (*p->endline)(p);
1.1 kristaps 268: return;
269: }
270:
1.9 schwarze 271: if (TERMP_HANG & p->flags) {
1.72 schwarze 272: p->overstep = (int)(vis - maxvis +
1.83 schwarze 273: p->trailspace * (*p->width)(p, ' '));
1.9 schwarze 274:
275: /*
276: * If we have overstepped the margin, temporarily move
277: * it to the right and flag the rest of the line to be
278: * shorter.
1.73 schwarze 279: * If there is a request to keep the columns together,
280: * allow negative overstep when the column is not full.
1.9 schwarze 281: */
1.73 schwarze 282: if (p->trailspace && p->overstep < 0)
1.26 schwarze 283: p->overstep = 0;
1.61 schwarze 284: return;
1.9 schwarze 285:
286: } else if (TERMP_DANGLE & p->flags)
287: return;
1.1 kristaps 288:
1.61 schwarze 289: /* If the column was overrun, break the line. */
1.72 schwarze 290: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.37 schwarze 291: (*p->endline)(p);
1.61 schwarze 292: p->viscol = 0;
1.9 schwarze 293: }
1.1 kristaps 294: }
295:
1.83 schwarze 296: /*
1.1 kristaps 297: * A newline only breaks an existing line; it won't assert vertical
298: * space. All data in the output buffer is flushed prior to the newline
299: * assertion.
300: */
301: void
302: term_newln(struct termp *p)
303: {
304:
305: p->flags |= TERMP_NOSPACE;
1.61 schwarze 306: if (p->col || p->viscol)
307: term_flushln(p);
1.1 kristaps 308: }
309:
310: /*
311: * Asserts a vertical space (a full, empty line-break between lines).
312: * Note that if used twice, this will cause two blank spaces and so on.
313: * All data in the output buffer is flushed prior to the newline
314: * assertion.
315: */
316: void
317: term_vspace(struct termp *p)
318: {
319:
320: term_newln(p);
1.29 schwarze 321: p->viscol = 0;
1.63 schwarze 322: if (0 < p->skipvsp)
323: p->skipvsp--;
324: else
325: (*p->endline)(p);
1.1 kristaps 326: }
327:
1.20 schwarze 328: void
329: term_fontlast(struct termp *p)
330: {
331: enum termfont f;
1.11 schwarze 332:
1.20 schwarze 333: f = p->fontl;
334: p->fontl = p->fontq[p->fonti];
335: p->fontq[p->fonti] = f;
336: }
337:
338: void
339: term_fontrepl(struct termp *p, enum termfont f)
340: {
341:
342: p->fontl = p->fontq[p->fonti];
343: p->fontq[p->fonti] = f;
1.1 kristaps 344: }
345:
1.20 schwarze 346: void
347: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 348: {
1.7 schwarze 349:
1.20 schwarze 350: assert(p->fonti + 1 < 10);
351: p->fontl = p->fontq[p->fonti];
352: p->fontq[++p->fonti] = f;
353: }
1.1 kristaps 354:
1.20 schwarze 355: const void *
356: term_fontq(struct termp *p)
357: {
1.1 kristaps 358:
1.20 schwarze 359: return(&p->fontq[p->fonti]);
360: }
1.1 kristaps 361:
1.20 schwarze 362: enum termfont
363: term_fonttop(struct termp *p)
364: {
1.1 kristaps 365:
1.20 schwarze 366: return(p->fontq[p->fonti]);
367: }
1.7 schwarze 368:
1.20 schwarze 369: void
370: term_fontpopq(struct termp *p, const void *key)
371: {
1.1 kristaps 372:
1.67 schwarze 373: while (p->fonti >= 0 && key < (void *)(p->fontq + p->fonti))
1.20 schwarze 374: p->fonti--;
375: assert(p->fonti >= 0);
376: }
1.1 kristaps 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: {
1.75 schwarze 394: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.59 schwarze 395: const char *seq, *cp;
396: char c;
397: int sz, uc;
1.20 schwarze 398: size_t ssz;
1.59 schwarze 399: enum mandoc_esc esc;
1.1 kristaps 400:
1.31 schwarze 401: if ( ! (TERMP_NOSPACE & p->flags)) {
1.40 schwarze 402: if ( ! (TERMP_KEEP & p->flags)) {
1.31 schwarze 403: bufferc(p, ' ');
1.40 schwarze 404: if (TERMP_SENTENCE & p->flags)
405: bufferc(p, ' ');
406: } else
407: bufferc(p, ASCII_NBRSP);
1.31 schwarze 408: }
1.68 schwarze 409: if (TERMP_PREKEEP & p->flags)
410: p->flags |= TERMP_KEEP;
1.1 kristaps 411:
412: if ( ! (p->flags & TERMP_NONOSPACE))
413: p->flags &= ~TERMP_NOSPACE;
1.46 schwarze 414: else
415: p->flags |= TERMP_NOSPACE;
1.1 kristaps 416:
1.74 schwarze 417: p->flags &= ~TERMP_SENTENCE;
1.31 schwarze 418:
1.59 schwarze 419: while ('\0' != *word) {
1.64 schwarze 420: if ('\\' != *word) {
421: if (TERMP_SKIPCHAR & p->flags) {
422: p->flags &= ~TERMP_SKIPCHAR;
423: word++;
424: continue;
425: }
1.75 schwarze 426: if (TERMP_NBRWORD & p->flags) {
427: if (' ' == *word) {
428: encode(p, nbrsp, 1);
429: word++;
430: continue;
431: }
432: ssz = strcspn(word, "\\ ");
433: } else
434: ssz = strcspn(word, "\\");
1.45 schwarze 435: encode(p, word, ssz);
1.64 schwarze 436: word += (int)ssz;
1.20 schwarze 437: continue;
1.64 schwarze 438: }
1.20 schwarze 439:
1.59 schwarze 440: word++;
441: esc = mandoc_escape(&word, &seq, &sz);
442: if (ESCAPE_ERROR == esc)
1.85 schwarze 443: continue;
1.59 schwarze 444:
445: switch (esc) {
1.83 schwarze 446: case ESCAPE_UNICODE:
1.89 schwarze 447: uc = mchars_num2uc(seq + 1, sz - 1);
448: if (p->enc == TERMENC_ASCII) {
449: cp = ascii_uc2str(uc);
450: encode(p, cp, strlen(cp));
451: } else
452: encode1(p, uc);
1.56 schwarze 453: break;
1.83 schwarze 454: case ESCAPE_NUMBERED:
1.59 schwarze 455: c = mchars_num2char(seq, sz);
456: if ('\0' != c)
457: encode(p, &c, 1);
1.20 schwarze 458: break;
1.83 schwarze 459: case ESCAPE_SPECIAL:
1.89 schwarze 460: if (p->enc == TERMENC_ASCII) {
461: cp = mchars_spec2str(p->symtab,
462: seq, sz, &ssz);
463: if (cp == NULL)
464: encode(p, "<?>", 3);
465: else
466: encode(p, cp, ssz);
467: } else {
468: uc = mchars_spec2cp(p->symtab, seq, sz);
1.90 ! schwarze 469: if (uc > 0)
! 470: encode1(p, uc);
1.89 schwarze 471: }
1.20 schwarze 472: break;
1.83 schwarze 473: case ESCAPE_FONTBOLD:
1.20 schwarze 474: term_fontrepl(p, TERMFONT_BOLD);
475: break;
1.83 schwarze 476: case ESCAPE_FONTITALIC:
1.20 schwarze 477: term_fontrepl(p, TERMFONT_UNDER);
478: break;
1.83 schwarze 479: case ESCAPE_FONTBI:
1.70 schwarze 480: term_fontrepl(p, TERMFONT_BI);
481: break;
1.83 schwarze 482: case ESCAPE_FONT:
1.59 schwarze 483: /* FALLTHROUGH */
1.83 schwarze 484: case ESCAPE_FONTROMAN:
1.20 schwarze 485: term_fontrepl(p, TERMFONT_NONE);
486: break;
1.83 schwarze 487: case ESCAPE_FONTPREV:
1.20 schwarze 488: term_fontlast(p);
489: break;
1.83 schwarze 490: case ESCAPE_NOSPACE:
1.64 schwarze 491: if (TERMP_SKIPCHAR & p->flags)
492: p->flags &= ~TERMP_SKIPCHAR;
493: else if ('\0' == *word)
1.59 schwarze 494: p->flags |= TERMP_NOSPACE;
495: break;
1.83 schwarze 496: case ESCAPE_SKIPCHAR:
1.64 schwarze 497: p->flags |= TERMP_SKIPCHAR;
498: break;
1.20 schwarze 499: default:
500: break;
501: }
502: }
1.75 schwarze 503: p->flags &= ~TERMP_NBRWORD;
1.1 kristaps 504: }
505:
506: static void
1.71 schwarze 507: adjbuf(struct termp *p, size_t sz)
1.1 kristaps 508: {
509:
1.20 schwarze 510: if (0 == p->maxcols)
511: p->maxcols = 1024;
512: while (sz >= p->maxcols)
513: p->maxcols <<= 2;
514:
1.84 schwarze 515: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.1 kristaps 516: }
517:
1.4 schwarze 518: static void
1.20 schwarze 519: bufferc(struct termp *p, char c)
520: {
521:
522: if (p->col + 1 >= p->maxcols)
523: adjbuf(p, p->col + 1);
524:
1.59 schwarze 525: p->buf[p->col++] = c;
1.20 schwarze 526: }
527:
1.59 schwarze 528: /*
529: * See encode().
530: * Do this for a single (probably unicode) value.
531: * Does not check for non-decorated glyphs.
532: */
533: static void
534: encode1(struct termp *p, int c)
535: {
536: enum termfont f;
537:
1.64 schwarze 538: if (TERMP_SKIPCHAR & p->flags) {
539: p->flags &= ~TERMP_SKIPCHAR;
540: return;
541: }
542:
1.70 schwarze 543: if (p->col + 6 >= p->maxcols)
544: adjbuf(p, p->col + 6);
1.59 schwarze 545:
546: f = term_fonttop(p);
547:
1.70 schwarze 548: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.59 schwarze 549: p->buf[p->col++] = '_';
1.70 schwarze 550: p->buf[p->col++] = 8;
551: }
552: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
553: if (ASCII_HYPH == c)
554: p->buf[p->col++] = '-';
555: else
556: p->buf[p->col++] = c;
557: p->buf[p->col++] = 8;
558: }
1.59 schwarze 559: p->buf[p->col++] = c;
560: }
1.20 schwarze 561:
562: static void
563: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 564: {
1.71 schwarze 565: size_t i;
1.59 schwarze 566:
1.64 schwarze 567: if (TERMP_SKIPCHAR & p->flags) {
568: p->flags &= ~TERMP_SKIPCHAR;
569: return;
570: }
571:
1.20 schwarze 572: /*
573: * Encode and buffer a string of characters. If the current
574: * font mode is unset, buffer directly, else encode then buffer
575: * character by character.
576: */
577:
1.70 schwarze 578: if (TERMFONT_NONE == term_fonttop(p)) {
1.83 schwarze 579: if (p->col + sz >= p->maxcols)
1.71 schwarze 580: adjbuf(p, p->col + sz);
581: for (i = 0; i < sz; i++)
1.59 schwarze 582: p->buf[p->col++] = word[i];
1.20 schwarze 583: return;
584: }
585:
1.46 schwarze 586: /* Pre-buffer, assuming worst-case. */
587:
1.71 schwarze 588: if (p->col + 1 + (sz * 5) >= p->maxcols)
589: adjbuf(p, p->col + 1 + (sz * 5));
1.46 schwarze 590:
1.71 schwarze 591: for (i = 0; i < sz; i++) {
1.70 schwarze 592: if (ASCII_HYPH == word[i] ||
593: isgraph((unsigned char)word[i]))
594: encode1(p, word[i]);
1.20 schwarze 595: else
1.59 schwarze 596: p->buf[p->col++] = word[i];
1.4 schwarze 597: }
1.80 schwarze 598: }
599:
600: void
601: term_setwidth(struct termp *p, const char *wstr)
602: {
603: struct roffsu su;
604: size_t width;
605: int iop;
606:
1.81 schwarze 607: iop = 0;
608: width = 0;
1.80 schwarze 609: if (NULL != wstr) {
610: switch (*wstr) {
1.83 schwarze 611: case '+':
1.80 schwarze 612: iop = 1;
613: wstr++;
614: break;
1.83 schwarze 615: case '-':
1.80 schwarze 616: iop = -1;
617: wstr++;
618: break;
619: default:
620: break;
621: }
1.81 schwarze 622: if (a2roffsu(wstr, &su, SCALE_MAX))
623: width = term_hspan(p, &su);
624: else
1.80 schwarze 625: iop = 0;
626: }
627: (*p->setwidth)(p, iop, width);
1.4 schwarze 628: }
1.16 schwarze 629:
630: size_t
1.39 schwarze 631: term_len(const struct termp *p, size_t sz)
632: {
633:
634: return((*p->width)(p, ' ') * sz);
635: }
636:
1.64 schwarze 637: static size_t
638: cond_width(const struct termp *p, int c, int *skip)
639: {
640:
641: if (*skip) {
642: (*skip) = 0;
643: return(0);
644: } else
645: return((*p->width)(p, c));
646: }
1.39 schwarze 647:
648: size_t
649: term_strlen(const struct termp *p, const char *cp)
650: {
1.59 schwarze 651: size_t sz, rsz, i;
1.64 schwarze 652: int ssz, skip, c;
1.50 schwarze 653: const char *seq, *rhs;
1.59 schwarze 654: enum mandoc_esc esc;
1.77 schwarze 655: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
656: ASCII_BREAK, '\0' };
1.59 schwarze 657:
658: /*
659: * Account for escaped sequences within string length
660: * calculations. This follows the logic in term_word() as we
661: * must calculate the width of produced strings.
662: */
663:
664: sz = 0;
1.64 schwarze 665: skip = 0;
1.59 schwarze 666: while ('\0' != *cp) {
667: rsz = strcspn(cp, rej);
668: for (i = 0; i < rsz; i++)
1.64 schwarze 669: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 670:
671: switch (*cp) {
1.83 schwarze 672: case '\\':
1.59 schwarze 673: cp++;
674: esc = mandoc_escape(&cp, &seq, &ssz);
675: if (ESCAPE_ERROR == esc)
1.85 schwarze 676: continue;
1.59 schwarze 677:
678: rhs = NULL;
1.50 schwarze 679:
1.59 schwarze 680: switch (esc) {
1.83 schwarze 681: case ESCAPE_UNICODE:
1.89 schwarze 682: c = mchars_num2uc(seq + 1, sz - 1);
683: if (p->enc == TERMENC_ASCII) {
684: rhs = ascii_uc2str(c);
685: rsz = strlen(rhs);
686: } else
687: sz += cond_width(p, c, &skip);
1.59 schwarze 688: break;
1.83 schwarze 689: case ESCAPE_NUMBERED:
1.59 schwarze 690: c = mchars_num2char(seq, ssz);
691: if ('\0' != c)
1.64 schwarze 692: sz += cond_width(p, c, &skip);
1.50 schwarze 693: break;
1.83 schwarze 694: case ESCAPE_SPECIAL:
1.89 schwarze 695: if (p->enc == TERMENC_ASCII) {
696: rhs = mchars_spec2str(p->symtab,
697: seq, ssz, &rsz);
698: if (rhs == NULL) {
699: rhs = "<?>";
700: rsz = 3;
701: }
702: } else {
703: c = mchars_spec2cp(p->symtab,
704: seq, ssz);
1.90 ! schwarze 705: if (c > 0)
! 706: sz += cond_width(p, c, &skip);
1.89 schwarze 707: }
1.50 schwarze 708: break;
1.83 schwarze 709: case ESCAPE_SKIPCHAR:
1.64 schwarze 710: skip = 1;
711: break;
1.50 schwarze 712: default:
713: break;
714: }
1.39 schwarze 715:
1.59 schwarze 716: if (NULL == rhs)
717: break;
718:
1.64 schwarze 719: if (skip) {
720: skip = 0;
721: break;
722: }
723:
1.59 schwarze 724: for (i = 0; i < rsz; i++)
725: sz += (*p->width)(p, *rhs++);
726: break;
1.83 schwarze 727: case ASCII_NBRSP:
1.64 schwarze 728: sz += cond_width(p, ' ', &skip);
1.55 schwarze 729: cp++;
1.59 schwarze 730: break;
1.83 schwarze 731: case ASCII_HYPH:
1.64 schwarze 732: sz += cond_width(p, '-', &skip);
1.55 schwarze 733: cp++;
1.77 schwarze 734: /* FALLTHROUGH */
1.83 schwarze 735: case ASCII_BREAK:
1.59 schwarze 736: break;
737: default:
738: break;
739: }
740: }
1.39 schwarze 741:
742: return(sz);
743: }
744:
745: size_t
746: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 747: {
748: double r;
749:
750: switch (su->unit) {
1.83 schwarze 751: case SCALE_CM:
1.86 schwarze 752: r = su->scale * 2.0;
1.16 schwarze 753: break;
1.83 schwarze 754: case SCALE_IN:
1.86 schwarze 755: r = su->scale * 6.0;
1.16 schwarze 756: break;
1.83 schwarze 757: case SCALE_PC:
1.16 schwarze 758: r = su->scale;
759: break;
1.83 schwarze 760: case SCALE_PT:
1.86 schwarze 761: r = su->scale / 8.0;
1.16 schwarze 762: break;
1.83 schwarze 763: case SCALE_MM:
1.86 schwarze 764: r = su->scale / 1000.0;
1.16 schwarze 765: break;
1.83 schwarze 766: case SCALE_VS:
1.16 schwarze 767: r = su->scale;
768: break;
769: default:
1.86 schwarze 770: r = su->scale - 1.0;
1.16 schwarze 771: break;
772: }
773:
774: if (r < 0.0)
775: r = 0.0;
1.87 schwarze 776: return((size_t)(r + 0.0005));
1.16 schwarze 777: }
778:
779: size_t
1.39 schwarze 780: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 781: {
1.44 schwarze 782: double v;
1.16 schwarze 783:
1.86 schwarze 784: v = (*p->hspan)(p, su);
1.44 schwarze 785: if (v < 0.0)
786: v = 0.0;
1.87 schwarze 787: return((size_t)(v + 0.0005));
1.16 schwarze 788: }
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