Annotation of src/usr.bin/mandoc/term.c, Revision 1.84
1.84 ! schwarze 1: /* $Id: term.c,v 1.83 2014/04/20 16:44:44 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;
221: while (' ' == 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)
443: break;
444:
445: if (TERMENC_ASCII != p->enc)
446: switch (esc) {
1.83 schwarze 447: case ESCAPE_UNICODE:
1.59 schwarze 448: uc = mchars_num2uc(seq + 1, sz - 1);
449: if ('\0' == uc)
450: break;
451: encode1(p, uc);
452: continue;
1.83 schwarze 453: case ESCAPE_SPECIAL:
1.59 schwarze 454: uc = mchars_spec2cp(p->symtab, seq, sz);
455: if (uc <= 0)
456: break;
457: encode1(p, uc);
458: continue;
459: default:
460: break;
461: }
1.20 schwarze 462:
1.59 schwarze 463: switch (esc) {
1.83 schwarze 464: case ESCAPE_UNICODE:
1.59 schwarze 465: encode1(p, '?');
1.56 schwarze 466: break;
1.83 schwarze 467: case ESCAPE_NUMBERED:
1.59 schwarze 468: c = mchars_num2char(seq, sz);
469: if ('\0' != c)
470: encode(p, &c, 1);
1.20 schwarze 471: break;
1.83 schwarze 472: case ESCAPE_SPECIAL:
1.59 schwarze 473: cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
1.83 schwarze 474: if (NULL != cp)
1.59 schwarze 475: encode(p, cp, ssz);
476: else if (1 == ssz)
477: encode(p, seq, sz);
1.20 schwarze 478: break;
1.83 schwarze 479: case ESCAPE_FONTBOLD:
1.20 schwarze 480: term_fontrepl(p, TERMFONT_BOLD);
481: break;
1.83 schwarze 482: case ESCAPE_FONTITALIC:
1.20 schwarze 483: term_fontrepl(p, TERMFONT_UNDER);
484: break;
1.83 schwarze 485: case ESCAPE_FONTBI:
1.70 schwarze 486: term_fontrepl(p, TERMFONT_BI);
487: break;
1.83 schwarze 488: case ESCAPE_FONT:
1.59 schwarze 489: /* FALLTHROUGH */
1.83 schwarze 490: case ESCAPE_FONTROMAN:
1.20 schwarze 491: term_fontrepl(p, TERMFONT_NONE);
492: break;
1.83 schwarze 493: case ESCAPE_FONTPREV:
1.20 schwarze 494: term_fontlast(p);
495: break;
1.83 schwarze 496: case ESCAPE_NOSPACE:
1.64 schwarze 497: if (TERMP_SKIPCHAR & p->flags)
498: p->flags &= ~TERMP_SKIPCHAR;
499: else if ('\0' == *word)
1.59 schwarze 500: p->flags |= TERMP_NOSPACE;
501: break;
1.83 schwarze 502: case ESCAPE_SKIPCHAR:
1.64 schwarze 503: p->flags |= TERMP_SKIPCHAR;
504: break;
1.20 schwarze 505: default:
506: break;
507: }
508: }
1.75 schwarze 509: p->flags &= ~TERMP_NBRWORD;
1.1 kristaps 510: }
511:
512: static void
1.71 schwarze 513: adjbuf(struct termp *p, size_t sz)
1.1 kristaps 514: {
515:
1.20 schwarze 516: if (0 == p->maxcols)
517: p->maxcols = 1024;
518: while (sz >= p->maxcols)
519: p->maxcols <<= 2;
520:
1.84 ! schwarze 521: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.1 kristaps 522: }
523:
1.4 schwarze 524: static void
1.20 schwarze 525: bufferc(struct termp *p, char c)
526: {
527:
528: if (p->col + 1 >= p->maxcols)
529: adjbuf(p, p->col + 1);
530:
1.59 schwarze 531: p->buf[p->col++] = c;
1.20 schwarze 532: }
533:
1.59 schwarze 534: /*
535: * See encode().
536: * Do this for a single (probably unicode) value.
537: * Does not check for non-decorated glyphs.
538: */
539: static void
540: encode1(struct termp *p, int c)
541: {
542: enum termfont f;
543:
1.64 schwarze 544: if (TERMP_SKIPCHAR & p->flags) {
545: p->flags &= ~TERMP_SKIPCHAR;
546: return;
547: }
548:
1.70 schwarze 549: if (p->col + 6 >= p->maxcols)
550: adjbuf(p, p->col + 6);
1.59 schwarze 551:
552: f = term_fonttop(p);
553:
1.70 schwarze 554: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.59 schwarze 555: p->buf[p->col++] = '_';
1.70 schwarze 556: p->buf[p->col++] = 8;
557: }
558: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
559: if (ASCII_HYPH == c)
560: p->buf[p->col++] = '-';
561: else
562: p->buf[p->col++] = c;
563: p->buf[p->col++] = 8;
564: }
1.59 schwarze 565: p->buf[p->col++] = c;
566: }
1.20 schwarze 567:
568: static void
569: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 570: {
1.71 schwarze 571: size_t i;
1.59 schwarze 572:
1.64 schwarze 573: if (TERMP_SKIPCHAR & p->flags) {
574: p->flags &= ~TERMP_SKIPCHAR;
575: return;
576: }
577:
1.20 schwarze 578: /*
579: * Encode and buffer a string of characters. If the current
580: * font mode is unset, buffer directly, else encode then buffer
581: * character by character.
582: */
583:
1.70 schwarze 584: if (TERMFONT_NONE == term_fonttop(p)) {
1.83 schwarze 585: if (p->col + sz >= p->maxcols)
1.71 schwarze 586: adjbuf(p, p->col + sz);
587: for (i = 0; i < sz; i++)
1.59 schwarze 588: p->buf[p->col++] = word[i];
1.20 schwarze 589: return;
590: }
591:
1.46 schwarze 592: /* Pre-buffer, assuming worst-case. */
593:
1.71 schwarze 594: if (p->col + 1 + (sz * 5) >= p->maxcols)
595: adjbuf(p, p->col + 1 + (sz * 5));
1.46 schwarze 596:
1.71 schwarze 597: for (i = 0; i < sz; i++) {
1.70 schwarze 598: if (ASCII_HYPH == word[i] ||
599: isgraph((unsigned char)word[i]))
600: encode1(p, word[i]);
1.20 schwarze 601: else
1.59 schwarze 602: p->buf[p->col++] = word[i];
1.4 schwarze 603: }
1.80 schwarze 604: }
605:
606: void
607: term_setwidth(struct termp *p, const char *wstr)
608: {
609: struct roffsu su;
610: size_t width;
611: int iop;
612:
1.81 schwarze 613: iop = 0;
614: width = 0;
1.80 schwarze 615: if (NULL != wstr) {
616: switch (*wstr) {
1.83 schwarze 617: case '+':
1.80 schwarze 618: iop = 1;
619: wstr++;
620: break;
1.83 schwarze 621: case '-':
1.80 schwarze 622: iop = -1;
623: wstr++;
624: break;
625: default:
626: break;
627: }
1.81 schwarze 628: if (a2roffsu(wstr, &su, SCALE_MAX))
629: width = term_hspan(p, &su);
630: else
1.80 schwarze 631: iop = 0;
632: }
633: (*p->setwidth)(p, iop, width);
1.4 schwarze 634: }
1.16 schwarze 635:
636: size_t
1.39 schwarze 637: term_len(const struct termp *p, size_t sz)
638: {
639:
640: return((*p->width)(p, ' ') * sz);
641: }
642:
1.64 schwarze 643: static size_t
644: cond_width(const struct termp *p, int c, int *skip)
645: {
646:
647: if (*skip) {
648: (*skip) = 0;
649: return(0);
650: } else
651: return((*p->width)(p, c));
652: }
1.39 schwarze 653:
654: size_t
655: term_strlen(const struct termp *p, const char *cp)
656: {
1.59 schwarze 657: size_t sz, rsz, i;
1.64 schwarze 658: int ssz, skip, c;
1.50 schwarze 659: const char *seq, *rhs;
1.59 schwarze 660: enum mandoc_esc esc;
1.77 schwarze 661: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
662: ASCII_BREAK, '\0' };
1.59 schwarze 663:
664: /*
665: * Account for escaped sequences within string length
666: * calculations. This follows the logic in term_word() as we
667: * must calculate the width of produced strings.
668: */
669:
670: sz = 0;
1.64 schwarze 671: skip = 0;
1.59 schwarze 672: while ('\0' != *cp) {
673: rsz = strcspn(cp, rej);
674: for (i = 0; i < rsz; i++)
1.64 schwarze 675: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 676:
677: switch (*cp) {
1.83 schwarze 678: case '\\':
1.59 schwarze 679: cp++;
680: esc = mandoc_escape(&cp, &seq, &ssz);
681: if (ESCAPE_ERROR == esc)
682: return(sz);
683:
684: if (TERMENC_ASCII != p->enc)
685: switch (esc) {
1.83 schwarze 686: case ESCAPE_UNICODE:
687: c = mchars_num2uc(seq + 1,
688: ssz - 1);
1.59 schwarze 689: if ('\0' == c)
690: break;
1.64 schwarze 691: sz += cond_width(p, c, &skip);
1.59 schwarze 692: continue;
1.83 schwarze 693: case ESCAPE_SPECIAL:
694: c = mchars_spec2cp(p->symtab,
695: seq, ssz);
1.59 schwarze 696: if (c <= 0)
697: break;
1.64 schwarze 698: sz += cond_width(p, c, &skip);
1.59 schwarze 699: continue;
700: default:
701: break;
702: }
703:
704: rhs = NULL;
1.50 schwarze 705:
1.59 schwarze 706: switch (esc) {
1.83 schwarze 707: case ESCAPE_UNICODE:
1.64 schwarze 708: sz += cond_width(p, '?', &skip);
1.59 schwarze 709: break;
1.83 schwarze 710: case ESCAPE_NUMBERED:
1.59 schwarze 711: c = mchars_num2char(seq, ssz);
712: if ('\0' != c)
1.64 schwarze 713: sz += cond_width(p, c, &skip);
1.50 schwarze 714: break;
1.83 schwarze 715: case ESCAPE_SPECIAL:
716: rhs = mchars_spec2str(p->symtab,
717: seq, ssz, &rsz);
1.50 schwarze 718:
1.59 schwarze 719: if (ssz != 1 || rhs)
1.50 schwarze 720: break;
721:
722: rhs = seq;
723: rsz = ssz;
724: break;
1.83 schwarze 725: case ESCAPE_SKIPCHAR:
1.64 schwarze 726: skip = 1;
727: break;
1.50 schwarze 728: default:
729: break;
730: }
1.39 schwarze 731:
1.59 schwarze 732: if (NULL == rhs)
733: break;
734:
1.64 schwarze 735: if (skip) {
736: skip = 0;
737: break;
738: }
739:
1.59 schwarze 740: for (i = 0; i < rsz; i++)
741: sz += (*p->width)(p, *rhs++);
742: break;
1.83 schwarze 743: case ASCII_NBRSP:
1.64 schwarze 744: sz += cond_width(p, ' ', &skip);
1.55 schwarze 745: cp++;
1.59 schwarze 746: break;
1.83 schwarze 747: case ASCII_HYPH:
1.64 schwarze 748: sz += cond_width(p, '-', &skip);
1.55 schwarze 749: cp++;
1.77 schwarze 750: /* FALLTHROUGH */
1.83 schwarze 751: case ASCII_BREAK:
1.59 schwarze 752: break;
753: default:
754: break;
755: }
756: }
1.39 schwarze 757:
758: return(sz);
759: }
760:
761: size_t
762: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 763: {
764: double r;
765:
766: switch (su->unit) {
1.83 schwarze 767: case SCALE_CM:
1.16 schwarze 768: r = su->scale * 2;
769: break;
1.83 schwarze 770: case SCALE_IN:
1.16 schwarze 771: r = su->scale * 6;
772: break;
1.83 schwarze 773: case SCALE_PC:
1.16 schwarze 774: r = su->scale;
775: break;
1.83 schwarze 776: case SCALE_PT:
1.16 schwarze 777: r = su->scale / 8;
778: break;
1.83 schwarze 779: case SCALE_MM:
1.16 schwarze 780: r = su->scale / 1000;
781: break;
1.83 schwarze 782: case SCALE_VS:
1.16 schwarze 783: r = su->scale;
784: break;
785: default:
786: r = su->scale - 1;
787: break;
788: }
789:
790: if (r < 0.0)
791: r = 0.0;
1.83 schwarze 792: return((size_t)r);
1.16 schwarze 793: }
794:
795: size_t
1.39 schwarze 796: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 797: {
1.44 schwarze 798: double v;
1.16 schwarze 799:
1.44 schwarze 800: v = ((*p->hspan)(p, su));
801: if (v < 0.0)
802: v = 0.0;
1.83 schwarze 803: return((size_t)v);
1.16 schwarze 804: }
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