Annotation of src/usr.bin/mandoc/term.c, Revision 1.108
1.108 ! schwarze 1: /* $OpenBSD: term.c,v 1.107 2015/04/04 17:46:58 schwarze Exp $ */
1.1 kristaps 2: /*
1.59 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.103 schwarze 4: * Copyright (c) 2010-2015 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: *
1.106 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.2 schwarze 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.106 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.2 schwarze 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:
1.91 schwarze 43: free(p->buf);
1.98 schwarze 44: free(p->fontq);
1.37 schwarze 45: free(p);
1.1 kristaps 46: }
47:
1.13 schwarze 48: void
1.83 schwarze 49: term_begin(struct termp *p, term_margin head,
1.106 schwarze 50: term_margin foot, const struct roff_meta *arg)
1.1 kristaps 51: {
52:
1.37 schwarze 53: p->headf = head;
54: p->footf = foot;
55: p->argf = arg;
56: (*p->begin)(p);
1.1 kristaps 57: }
58:
1.37 schwarze 59: void
60: term_end(struct termp *p)
1.1 kristaps 61: {
62:
1.37 schwarze 63: (*p->end)(p);
1.1 kristaps 64: }
65:
66: /*
1.82 schwarze 67: * Flush a chunk of text. By default, break the output line each time
68: * the right margin is reached, and continue output on the next line
69: * at the same offset as the chunk itself. By default, also break the
70: * output line at the end of the chunk.
1.27 schwarze 71: * The following flags may be specified:
1.1 kristaps 72: *
1.82 schwarze 73: * - TERMP_NOBREAK: Do not break the output line at the right margin,
74: * but only at the max right margin. Also, do not break the output
75: * line at the end of the chunk, such that the next call can pad to
76: * the next column. However, if less than p->trailspace blanks,
77: * which can be 0, 1, or 2, remain to the right margin, the line
78: * will be broken.
79: * - TERMP_BRIND: If the chunk does not fit and the output line has
80: * to be broken, start the next line at the right margin instead
81: * of at the offset. Used together with TERMP_NOBREAK for the tags
82: * in various kinds of tagged lists.
83: * - TERMP_DANGLE: Do not break the output line at the right margin,
84: * append the next chunk after it even if this one is too long.
85: * To be used together with TERMP_NOBREAK.
86: * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
87: * the next chunk if this column is not full.
1.1 kristaps 88: */
89: void
90: term_flushln(struct termp *p)
91: {
1.71 schwarze 92: size_t i; /* current input position in p->buf */
1.66 schwarze 93: int ntab; /* number of tabs to prepend */
1.19 schwarze 94: size_t vis; /* current visual position on output */
95: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 96: size_t vend; /* end of word visual position on output */
1.19 schwarze 97: size_t bp; /* visual right border position */
1.51 schwarze 98: size_t dv; /* temporary for visual pos calculations */
1.71 schwarze 99: size_t j; /* temporary loop index for p->buf */
100: size_t jhy; /* last hyph before overflow w/r/t j */
1.42 schwarze 101: size_t maxvis; /* output position of visible boundary */
1.1 kristaps 102:
103: /*
104: * First, establish the maximum columns of "visible" content.
105: * This is usually the difference between the right-margin and
106: * an indentation, but can be, for tagged lists or columns, a
1.73 schwarze 107: * small set of values.
108: *
109: * The following unsigned-signed subtractions look strange,
110: * but they are actually correct. If the int p->overstep
111: * is negative, it gets sign extended. Subtracting that
112: * very large size_t effectively adds a small number to dv.
1.1 kristaps 113: */
1.100 schwarze 114: dv = p->rmargin > p->offset ? p->rmargin - p->offset : 0;
1.53 schwarze 115: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.9 schwarze 116:
1.96 schwarze 117: if (p->flags & TERMP_NOBREAK) {
118: dv = p->maxrmargin > p->offset ?
119: p->maxrmargin - p->offset : 0;
120: bp = (int)dv > p->overstep ?
121: dv - (size_t)p->overstep : 0;
122: } else
123: bp = maxvis;
1.19 schwarze 124:
1.33 schwarze 125: /*
1.61 schwarze 126: * Calculate the required amount of padding.
1.33 schwarze 127: */
1.61 schwarze 128: vbl = p->offset + p->overstep > p->viscol ?
129: p->offset + p->overstep - p->viscol : 0;
1.33 schwarze 130:
1.53 schwarze 131: vis = vend = 0;
132: i = 0;
1.19 schwarze 133:
1.59 schwarze 134: while (i < p->col) {
1.22 schwarze 135: /*
1.42 schwarze 136: * Handle literal tab characters: collapse all
137: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 138: */
1.66 schwarze 139: ntab = 0;
1.59 schwarze 140: while (i < p->col && '\t' == p->buf[i]) {
1.42 schwarze 141: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.30 schwarze 142: vbl += vend - vis;
143: vis = vend;
1.66 schwarze 144: ntab++;
1.49 schwarze 145: i++;
1.30 schwarze 146: }
1.22 schwarze 147:
1.1 kristaps 148: /*
149: * Count up visible word characters. Control sequences
150: * (starting with the CSI) aren't counted. A space
151: * generates a non-printing word, which is valid (the
152: * space is printed according to regular spacing rules).
153: */
154:
1.59 schwarze 155: for (j = i, jhy = 0; j < p->col; j++) {
1.69 schwarze 156: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.1 kristaps 157: break;
1.42 schwarze 158:
159: /* Back over the the last printed character. */
160: if (8 == p->buf[j]) {
161: assert(j);
162: vend -= (*p->width)(p, p->buf[j - 1]);
163: continue;
164: }
165:
166: /* Regular word. */
167: /* Break at the hyphen point if we overrun. */
1.83 schwarze 168: if (vend > vis && vend < bp &&
1.77 schwarze 169: (ASCII_HYPH == p->buf[j] ||
170: ASCII_BREAK == p->buf[j]))
1.42 schwarze 171: jhy = j;
172:
1.78 schwarze 173: /*
174: * Hyphenation now decided, put back a real
175: * hyphen such that we get the correct width.
176: */
177: if (ASCII_HYPH == p->buf[j])
178: p->buf[j] = '-';
179:
1.42 schwarze 180: vend += (*p->width)(p, p->buf[j]);
1.1 kristaps 181: }
182:
183: /*
1.5 schwarze 184: * Find out whether we would exceed the right margin.
1.33 schwarze 185: * If so, break to the next line.
1.5 schwarze 186: */
1.33 schwarze 187: if (vend > bp && 0 == jhy && vis > 0) {
1.22 schwarze 188: vend -= vis;
1.37 schwarze 189: (*p->endline)(p);
1.62 schwarze 190: p->viscol = 0;
1.82 schwarze 191: if (TERMP_BRIND & p->flags) {
1.100 schwarze 192: vbl = p->rmargin;
193: vend += p->rmargin;
194: vend -= 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: */
1.95 schwarze 259: if (vis > vbl)
1.61 schwarze 260: vis -= vbl;
1.95 schwarze 261: else
262: vis = 0;
1.18 schwarze 263:
1.9 schwarze 264: p->col = 0;
1.26 schwarze 265: p->overstep = 0;
1.108 ! schwarze 266: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE);
1.1 kristaps 267:
1.9 schwarze 268: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 269: p->viscol = 0;
1.37 schwarze 270: (*p->endline)(p);
1.1 kristaps 271: return;
272: }
273:
1.9 schwarze 274: if (TERMP_HANG & p->flags) {
1.102 schwarze 275: p->overstep += (int)(p->offset + vis - p->rmargin +
1.83 schwarze 276: p->trailspace * (*p->width)(p, ' '));
1.9 schwarze 277:
278: /*
279: * If we have overstepped the margin, temporarily move
280: * it to the right and flag the rest of the line to be
281: * shorter.
1.73 schwarze 282: * If there is a request to keep the columns together,
283: * allow negative overstep when the column is not full.
1.9 schwarze 284: */
1.73 schwarze 285: if (p->trailspace && p->overstep < 0)
1.26 schwarze 286: p->overstep = 0;
1.61 schwarze 287: return;
1.9 schwarze 288:
289: } else if (TERMP_DANGLE & p->flags)
290: return;
1.1 kristaps 291:
1.61 schwarze 292: /* If the column was overrun, break the line. */
1.72 schwarze 293: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.37 schwarze 294: (*p->endline)(p);
1.61 schwarze 295: p->viscol = 0;
1.9 schwarze 296: }
1.1 kristaps 297: }
298:
1.83 schwarze 299: /*
1.1 kristaps 300: * A newline only breaks an existing line; it won't assert vertical
301: * space. All data in the output buffer is flushed prior to the newline
302: * assertion.
303: */
304: void
305: term_newln(struct termp *p)
306: {
307:
308: p->flags |= TERMP_NOSPACE;
1.61 schwarze 309: if (p->col || p->viscol)
310: term_flushln(p);
1.1 kristaps 311: }
312:
313: /*
314: * Asserts a vertical space (a full, empty line-break between lines).
315: * Note that if used twice, this will cause two blank spaces and so on.
316: * All data in the output buffer is flushed prior to the newline
317: * assertion.
318: */
319: void
320: term_vspace(struct termp *p)
321: {
322:
323: term_newln(p);
1.29 schwarze 324: p->viscol = 0;
1.63 schwarze 325: if (0 < p->skipvsp)
326: p->skipvsp--;
327: else
328: (*p->endline)(p);
1.1 kristaps 329: }
330:
1.98 schwarze 331: /* Swap current and previous font; for \fP and .ft P */
1.20 schwarze 332: void
333: term_fontlast(struct termp *p)
334: {
335: enum termfont f;
1.11 schwarze 336:
1.20 schwarze 337: f = p->fontl;
338: p->fontl = p->fontq[p->fonti];
339: p->fontq[p->fonti] = f;
340: }
341:
1.98 schwarze 342: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.20 schwarze 343: void
344: term_fontrepl(struct termp *p, enum termfont f)
345: {
346:
347: p->fontl = p->fontq[p->fonti];
348: p->fontq[p->fonti] = f;
1.1 kristaps 349: }
350:
1.98 schwarze 351: /* Set font, save previous. */
1.20 schwarze 352: void
353: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 354: {
1.7 schwarze 355:
1.20 schwarze 356: p->fontl = p->fontq[p->fonti];
1.98 schwarze 357: if (++p->fonti == p->fontsz) {
358: p->fontsz += 8;
359: p->fontq = mandoc_reallocarray(p->fontq,
360: p->fontsz, sizeof(enum termfont *));
361: }
362: p->fontq[p->fonti] = f;
1.20 schwarze 363: }
1.1 kristaps 364:
1.98 schwarze 365: /* Flush to make the saved pointer current again. */
1.20 schwarze 366: void
1.104 schwarze 367: term_fontpopq(struct termp *p, int i)
1.20 schwarze 368: {
1.1 kristaps 369:
1.104 schwarze 370: assert(i >= 0);
371: if (p->fonti > i)
372: p->fonti = i;
1.20 schwarze 373: }
1.1 kristaps 374:
1.98 schwarze 375: /* Pop one font off the stack. */
1.20 schwarze 376: void
377: term_fontpop(struct termp *p)
378: {
1.1 kristaps 379:
1.20 schwarze 380: assert(p->fonti);
381: p->fonti--;
1.1 kristaps 382: }
383:
384: /*
385: * Handle pwords, partial words, which may be either a single word or a
386: * phrase that cannot be broken down (such as a literal string). This
387: * handles word styling.
388: */
1.7 schwarze 389: void
390: term_word(struct termp *p, const char *word)
1.1 kristaps 391: {
1.75 schwarze 392: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.59 schwarze 393: const char *seq, *cp;
394: int sz, uc;
1.20 schwarze 395: size_t ssz;
1.59 schwarze 396: enum mandoc_esc esc;
1.1 kristaps 397:
1.31 schwarze 398: if ( ! (TERMP_NOSPACE & p->flags)) {
1.40 schwarze 399: if ( ! (TERMP_KEEP & p->flags)) {
1.31 schwarze 400: bufferc(p, ' ');
1.40 schwarze 401: if (TERMP_SENTENCE & p->flags)
402: bufferc(p, ' ');
403: } else
404: bufferc(p, ASCII_NBRSP);
1.31 schwarze 405: }
1.68 schwarze 406: if (TERMP_PREKEEP & p->flags)
407: p->flags |= TERMP_KEEP;
1.1 kristaps 408:
409: if ( ! (p->flags & TERMP_NONOSPACE))
410: p->flags &= ~TERMP_NOSPACE;
1.46 schwarze 411: else
412: p->flags |= TERMP_NOSPACE;
1.1 kristaps 413:
1.97 schwarze 414: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
1.105 schwarze 415: p->skipvsp = 0;
1.31 schwarze 416:
1.59 schwarze 417: while ('\0' != *word) {
1.64 schwarze 418: if ('\\' != *word) {
1.75 schwarze 419: if (TERMP_NBRWORD & p->flags) {
420: if (' ' == *word) {
421: encode(p, nbrsp, 1);
422: word++;
423: continue;
424: }
425: ssz = strcspn(word, "\\ ");
426: } else
427: ssz = strcspn(word, "\\");
1.45 schwarze 428: encode(p, word, ssz);
1.64 schwarze 429: word += (int)ssz;
1.20 schwarze 430: continue;
1.64 schwarze 431: }
1.20 schwarze 432:
1.59 schwarze 433: word++;
434: esc = mandoc_escape(&word, &seq, &sz);
435: if (ESCAPE_ERROR == esc)
1.85 schwarze 436: continue;
1.59 schwarze 437:
438: switch (esc) {
1.83 schwarze 439: case ESCAPE_UNICODE:
1.89 schwarze 440: uc = mchars_num2uc(seq + 1, sz - 1);
1.56 schwarze 441: break;
1.83 schwarze 442: case ESCAPE_NUMBERED:
1.93 schwarze 443: uc = mchars_num2char(seq, sz);
444: if (uc < 0)
445: continue;
1.20 schwarze 446: break;
1.83 schwarze 447: case ESCAPE_SPECIAL:
1.89 schwarze 448: if (p->enc == TERMENC_ASCII) {
449: cp = mchars_spec2str(p->symtab,
450: seq, sz, &ssz);
1.92 schwarze 451: if (cp != NULL)
1.89 schwarze 452: encode(p, cp, ssz);
453: } else {
454: uc = mchars_spec2cp(p->symtab, seq, sz);
1.90 schwarze 455: if (uc > 0)
456: encode1(p, uc);
1.89 schwarze 457: }
1.93 schwarze 458: continue;
1.83 schwarze 459: case ESCAPE_FONTBOLD:
1.20 schwarze 460: term_fontrepl(p, TERMFONT_BOLD);
1.93 schwarze 461: continue;
1.83 schwarze 462: case ESCAPE_FONTITALIC:
1.20 schwarze 463: term_fontrepl(p, TERMFONT_UNDER);
1.93 schwarze 464: continue;
1.83 schwarze 465: case ESCAPE_FONTBI:
1.70 schwarze 466: term_fontrepl(p, TERMFONT_BI);
1.93 schwarze 467: continue;
1.83 schwarze 468: case ESCAPE_FONT:
1.59 schwarze 469: /* FALLTHROUGH */
1.83 schwarze 470: case ESCAPE_FONTROMAN:
1.20 schwarze 471: term_fontrepl(p, TERMFONT_NONE);
1.93 schwarze 472: continue;
1.83 schwarze 473: case ESCAPE_FONTPREV:
1.20 schwarze 474: term_fontlast(p);
1.93 schwarze 475: continue;
1.83 schwarze 476: case ESCAPE_NOSPACE:
1.108 ! schwarze 477: if (p->flags & TERMP_BACKAFTER)
! 478: p->flags &= ~TERMP_BACKAFTER;
! 479: else if (*word == '\0')
1.97 schwarze 480: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.93 schwarze 481: continue;
1.83 schwarze 482: case ESCAPE_SKIPCHAR:
1.108 ! schwarze 483: p->flags |= TERMP_BACKAFTER;
1.93 schwarze 484: continue;
1.103 schwarze 485: case ESCAPE_OVERSTRIKE:
486: cp = seq + sz;
487: while (seq < cp) {
488: if (*seq == '\\') {
489: mandoc_escape(&seq, NULL, NULL);
490: continue;
491: }
492: encode1(p, *seq++);
1.108 ! schwarze 493: if (seq < cp) {
! 494: if (p->flags & TERMP_BACKBEFORE)
! 495: p->flags |= TERMP_BACKAFTER;
! 496: else
! 497: p->flags |= TERMP_BACKBEFORE;
! 498: }
1.103 schwarze 499: }
1.108 ! schwarze 500: continue;
1.20 schwarze 501: default:
1.93 schwarze 502: continue;
503: }
504:
505: /*
506: * Common handling for Unicode and numbered
507: * character escape sequences.
508: */
509:
510: if (p->enc == TERMENC_ASCII) {
511: cp = ascii_uc2str(uc);
512: encode(p, cp, strlen(cp));
513: } else {
514: if ((uc < 0x20 && uc != 0x09) ||
515: (uc > 0x7E && uc < 0xA0))
516: uc = 0xFFFD;
517: encode1(p, uc);
1.20 schwarze 518: }
519: }
1.75 schwarze 520: p->flags &= ~TERMP_NBRWORD;
1.1 kristaps 521: }
522:
523: static void
1.71 schwarze 524: adjbuf(struct termp *p, size_t sz)
1.1 kristaps 525: {
526:
1.20 schwarze 527: if (0 == p->maxcols)
528: p->maxcols = 1024;
529: while (sz >= p->maxcols)
530: p->maxcols <<= 2;
531:
1.84 schwarze 532: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.1 kristaps 533: }
534:
1.4 schwarze 535: static void
1.20 schwarze 536: bufferc(struct termp *p, char c)
537: {
538:
539: if (p->col + 1 >= p->maxcols)
540: adjbuf(p, p->col + 1);
541:
1.59 schwarze 542: p->buf[p->col++] = c;
1.20 schwarze 543: }
544:
1.59 schwarze 545: /*
546: * See encode().
547: * Do this for a single (probably unicode) value.
548: * Does not check for non-decorated glyphs.
549: */
550: static void
551: encode1(struct termp *p, int c)
552: {
553: enum termfont f;
554:
1.108 ! schwarze 555: if (p->col + 7 >= p->maxcols)
! 556: adjbuf(p, p->col + 7);
1.59 schwarze 557:
1.108 ! schwarze 558: f = (c == ASCII_HYPH || isgraph(c)) ?
! 559: p->fontq[p->fonti] : TERMFONT_NONE;
1.59 schwarze 560:
1.108 ! schwarze 561: if (p->flags & TERMP_BACKBEFORE) {
! 562: p->buf[p->col++] = 8;
! 563: p->flags &= ~TERMP_BACKBEFORE;
! 564: }
1.70 schwarze 565: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.59 schwarze 566: p->buf[p->col++] = '_';
1.70 schwarze 567: p->buf[p->col++] = 8;
568: }
569: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
570: if (ASCII_HYPH == c)
571: p->buf[p->col++] = '-';
572: else
573: p->buf[p->col++] = c;
574: p->buf[p->col++] = 8;
575: }
1.59 schwarze 576: p->buf[p->col++] = c;
1.108 ! schwarze 577: if (p->flags & TERMP_BACKAFTER) {
! 578: p->flags |= TERMP_BACKBEFORE;
! 579: p->flags &= ~TERMP_BACKAFTER;
! 580: }
1.59 schwarze 581: }
1.20 schwarze 582:
583: static void
584: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 585: {
1.71 schwarze 586: size_t i;
1.59 schwarze 587:
1.108 ! schwarze 588: if (p->col + 2 + (sz * 5) >= p->maxcols)
! 589: adjbuf(p, p->col + 2 + (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;
1.107 schwarze 604: int iop, width;
1.80 schwarze 605:
1.81 schwarze 606: iop = 0;
607: width = 0;
1.80 schwarze 608: if (NULL != wstr) {
609: switch (*wstr) {
1.83 schwarze 610: case '+':
1.80 schwarze 611: iop = 1;
612: wstr++;
613: break;
1.83 schwarze 614: case '-':
1.80 schwarze 615: iop = -1;
616: wstr++;
617: break;
618: default:
619: break;
620: }
1.81 schwarze 621: if (a2roffsu(wstr, &su, SCALE_MAX))
622: width = term_hspan(p, &su);
623: else
1.80 schwarze 624: iop = 0;
625: }
626: (*p->setwidth)(p, iop, width);
1.4 schwarze 627: }
1.16 schwarze 628:
629: size_t
1.39 schwarze 630: term_len(const struct termp *p, size_t sz)
631: {
632:
633: return((*p->width)(p, ' ') * sz);
634: }
635:
1.64 schwarze 636: static size_t
637: cond_width(const struct termp *p, int c, int *skip)
638: {
639:
640: if (*skip) {
641: (*skip) = 0;
642: return(0);
643: } else
644: return((*p->width)(p, c));
645: }
1.39 schwarze 646:
647: size_t
648: term_strlen(const struct termp *p, const char *cp)
649: {
1.59 schwarze 650: size_t sz, rsz, i;
1.93 schwarze 651: int ssz, skip, uc;
1.50 schwarze 652: const char *seq, *rhs;
1.59 schwarze 653: enum mandoc_esc esc;
1.77 schwarze 654: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
655: ASCII_BREAK, '\0' };
1.59 schwarze 656:
657: /*
658: * Account for escaped sequences within string length
659: * calculations. This follows the logic in term_word() as we
660: * must calculate the width of produced strings.
661: */
662:
663: sz = 0;
1.64 schwarze 664: skip = 0;
1.59 schwarze 665: while ('\0' != *cp) {
666: rsz = strcspn(cp, rej);
667: for (i = 0; i < rsz; i++)
1.64 schwarze 668: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 669:
670: switch (*cp) {
1.83 schwarze 671: case '\\':
1.59 schwarze 672: cp++;
673: esc = mandoc_escape(&cp, &seq, &ssz);
674: if (ESCAPE_ERROR == esc)
1.85 schwarze 675: continue;
1.59 schwarze 676:
677: rhs = NULL;
1.50 schwarze 678:
1.59 schwarze 679: switch (esc) {
1.83 schwarze 680: case ESCAPE_UNICODE:
1.94 schwarze 681: uc = mchars_num2uc(seq + 1, ssz - 1);
1.59 schwarze 682: break;
1.83 schwarze 683: case ESCAPE_NUMBERED:
1.93 schwarze 684: uc = mchars_num2char(seq, ssz);
685: if (uc < 0)
686: continue;
1.50 schwarze 687: break;
1.83 schwarze 688: case ESCAPE_SPECIAL:
1.93 schwarze 689: if (p->enc == TERMENC_ASCII) {
1.89 schwarze 690: rhs = mchars_spec2str(p->symtab,
691: seq, ssz, &rsz);
1.93 schwarze 692: if (rhs != NULL)
693: break;
694: } else {
695: uc = mchars_spec2cp(p->symtab,
1.89 schwarze 696: seq, ssz);
1.93 schwarze 697: if (uc > 0)
698: sz += cond_width(p, uc, &skip);
1.89 schwarze 699: }
1.93 schwarze 700: continue;
1.83 schwarze 701: case ESCAPE_SKIPCHAR:
1.64 schwarze 702: skip = 1;
1.103 schwarze 703: continue;
704: case ESCAPE_OVERSTRIKE:
705: rsz = 0;
706: rhs = seq + ssz;
707: while (seq < rhs) {
708: if (*seq == '\\') {
709: mandoc_escape(&seq, NULL, NULL);
710: continue;
711: }
712: i = (*p->width)(p, *seq++);
713: if (rsz < i)
714: rsz = i;
715: }
716: sz += rsz;
1.93 schwarze 717: continue;
1.50 schwarze 718: default:
1.93 schwarze 719: continue;
1.50 schwarze 720: }
1.39 schwarze 721:
1.93 schwarze 722: /*
723: * Common handling for Unicode and numbered
724: * character escape sequences.
725: */
726:
727: if (rhs == NULL) {
728: if (p->enc == TERMENC_ASCII) {
729: rhs = ascii_uc2str(uc);
730: rsz = strlen(rhs);
731: } else {
732: if ((uc < 0x20 && uc != 0x09) ||
733: (uc > 0x7E && uc < 0xA0))
734: uc = 0xFFFD;
735: sz += cond_width(p, uc, &skip);
736: continue;
737: }
738: }
1.59 schwarze 739:
1.64 schwarze 740: if (skip) {
741: skip = 0;
742: break;
743: }
1.93 schwarze 744:
745: /*
746: * Common handling for all escape sequences
747: * printing more than one character.
748: */
1.64 schwarze 749:
1.59 schwarze 750: for (i = 0; i < rsz; i++)
751: sz += (*p->width)(p, *rhs++);
752: break;
1.83 schwarze 753: case ASCII_NBRSP:
1.64 schwarze 754: sz += cond_width(p, ' ', &skip);
1.55 schwarze 755: cp++;
1.59 schwarze 756: break;
1.83 schwarze 757: case ASCII_HYPH:
1.64 schwarze 758: sz += cond_width(p, '-', &skip);
1.55 schwarze 759: cp++;
1.77 schwarze 760: /* FALLTHROUGH */
1.83 schwarze 761: case ASCII_BREAK:
1.59 schwarze 762: break;
763: default:
764: break;
765: }
766: }
1.39 schwarze 767:
768: return(sz);
769: }
770:
1.100 schwarze 771: int
1.39 schwarze 772: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 773: {
774: double r;
1.101 schwarze 775: int ri;
1.16 schwarze 776:
777: switch (su->unit) {
1.99 schwarze 778: case SCALE_BU:
779: r = su->scale / 40.0;
780: break;
1.83 schwarze 781: case SCALE_CM:
1.99 schwarze 782: r = su->scale * 6.0 / 2.54;
783: break;
784: case SCALE_FS:
785: r = su->scale * 65536.0 / 40.0;
1.16 schwarze 786: break;
1.83 schwarze 787: case SCALE_IN:
1.86 schwarze 788: r = su->scale * 6.0;
1.16 schwarze 789: break;
1.99 schwarze 790: case SCALE_MM:
791: r = su->scale * 0.006;
792: break;
1.83 schwarze 793: case SCALE_PC:
1.16 schwarze 794: r = su->scale;
795: break;
1.83 schwarze 796: case SCALE_PT:
1.99 schwarze 797: r = su->scale / 12.0;
1.16 schwarze 798: break;
1.99 schwarze 799: case SCALE_EN:
800: /* FALLTHROUGH */
801: case SCALE_EM:
802: r = su->scale * 0.6;
1.16 schwarze 803: break;
1.83 schwarze 804: case SCALE_VS:
1.16 schwarze 805: r = su->scale;
806: break;
807: default:
1.99 schwarze 808: abort();
809: /* NOTREACHED */
1.16 schwarze 810: }
1.101 schwarze 811: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
812: return(ri < 66 ? ri : 1);
1.16 schwarze 813: }
814:
1.107 schwarze 815: /*
816: * Convert a scaling width to basic units, rounding down.
817: */
1.100 schwarze 818: int
1.39 schwarze 819: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 820: {
821:
1.107 schwarze 822: return((*p->hspan)(p, su));
1.16 schwarze 823: }
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