Annotation of src/usr.bin/mandoc/term.c, Revision 1.96
1.96 ! schwarze 1: /* $OpenBSD: term.c,v 1.95 2014/11/16 21:29:27 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:
1.91 schwarze 43: free(p->buf);
1.37 schwarze 44: free(p);
1.1 kristaps 45: }
46:
1.13 schwarze 47: void
1.83 schwarze 48: term_begin(struct termp *p, term_margin head,
1.37 schwarze 49: term_margin foot, const void *arg)
1.1 kristaps 50: {
51:
1.37 schwarze 52: p->headf = head;
53: p->footf = foot;
54: p->argf = arg;
55: (*p->begin)(p);
1.1 kristaps 56: }
57:
1.37 schwarze 58: void
59: term_end(struct termp *p)
1.1 kristaps 60: {
61:
1.37 schwarze 62: (*p->end)(p);
1.1 kristaps 63: }
64:
65: /*
1.82 schwarze 66: * Flush a chunk of text. By default, break the output line each time
67: * the right margin is reached, and continue output on the next line
68: * at the same offset as the chunk itself. By default, also break the
69: * output line at the end of the chunk.
1.27 schwarze 70: * The following flags may be specified:
1.1 kristaps 71: *
1.82 schwarze 72: * - TERMP_NOBREAK: Do not break the output line at the right margin,
73: * but only at the max right margin. Also, do not break the output
74: * line at the end of the chunk, such that the next call can pad to
75: * the next column. However, if less than p->trailspace blanks,
76: * which can be 0, 1, or 2, remain to the right margin, the line
77: * will be broken.
78: * - TERMP_BRIND: If the chunk does not fit and the output line has
79: * to be broken, start the next line at the right margin instead
80: * of at the offset. Used together with TERMP_NOBREAK for the tags
81: * in various kinds of tagged lists.
82: * - TERMP_DANGLE: Do not break the output line at the right margin,
83: * append the next chunk after it even if this one is too long.
84: * To be used together with TERMP_NOBREAK.
85: * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
86: * the next chunk if this column is not full.
1.1 kristaps 87: */
88: void
89: term_flushln(struct termp *p)
90: {
1.71 schwarze 91: size_t i; /* current input position in p->buf */
1.66 schwarze 92: int ntab; /* number of tabs to prepend */
1.19 schwarze 93: size_t vis; /* current visual position on output */
94: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 95: size_t vend; /* end of word visual position on output */
1.19 schwarze 96: size_t bp; /* visual right border position */
1.51 schwarze 97: size_t dv; /* temporary for visual pos calculations */
1.71 schwarze 98: size_t j; /* temporary loop index for p->buf */
99: size_t jhy; /* last hyph before overflow w/r/t j */
1.42 schwarze 100: size_t maxvis; /* output position of visible boundary */
1.96 ! schwarze 101: size_t rmargin; /* the rightmost of the two margins */
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: */
1.96 ! schwarze 114: rmargin = p->rmargin > p->offset ? p->rmargin : p->offset;
! 115: dv = p->rmargin - p->offset;
1.53 schwarze 116: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.9 schwarze 117:
1.96 ! schwarze 118: if (p->flags & TERMP_NOBREAK) {
! 119: dv = p->maxrmargin > p->offset ?
! 120: p->maxrmargin - p->offset : 0;
! 121: bp = (int)dv > p->overstep ?
! 122: dv - (size_t)p->overstep : 0;
! 123: } else
! 124: bp = 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) {
1.96 ! schwarze 193: vbl = rmargin;
! 194: vend += 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: */
1.95 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;
1.1 kristaps 266:
1.9 schwarze 267: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 268: p->viscol = 0;
1.37 schwarze 269: (*p->endline)(p);
1.1 kristaps 270: return;
271: }
272:
1.9 schwarze 273: if (TERMP_HANG & p->flags) {
1.72 schwarze 274: p->overstep = (int)(vis - maxvis +
1.83 schwarze 275: p->trailspace * (*p->width)(p, ' '));
1.9 schwarze 276:
277: /*
278: * If we have overstepped the margin, temporarily move
279: * it to the right and flag the rest of the line to be
280: * shorter.
1.73 schwarze 281: * If there is a request to keep the columns together,
282: * allow negative overstep when the column is not full.
1.9 schwarze 283: */
1.73 schwarze 284: if (p->trailspace && p->overstep < 0)
1.26 schwarze 285: p->overstep = 0;
1.61 schwarze 286: return;
1.9 schwarze 287:
288: } else if (TERMP_DANGLE & p->flags)
289: return;
1.1 kristaps 290:
1.61 schwarze 291: /* If the column was overrun, break the line. */
1.72 schwarze 292: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.37 schwarze 293: (*p->endline)(p);
1.61 schwarze 294: p->viscol = 0;
1.9 schwarze 295: }
1.1 kristaps 296: }
297:
1.83 schwarze 298: /*
1.1 kristaps 299: * A newline only breaks an existing line; it won't assert vertical
300: * space. All data in the output buffer is flushed prior to the newline
301: * assertion.
302: */
303: void
304: term_newln(struct termp *p)
305: {
306:
307: p->flags |= TERMP_NOSPACE;
1.61 schwarze 308: if (p->col || p->viscol)
309: term_flushln(p);
1.1 kristaps 310: }
311:
312: /*
313: * Asserts a vertical space (a full, empty line-break between lines).
314: * Note that if used twice, this will cause two blank spaces and so on.
315: * All data in the output buffer is flushed prior to the newline
316: * assertion.
317: */
318: void
319: term_vspace(struct termp *p)
320: {
321:
322: term_newln(p);
1.29 schwarze 323: p->viscol = 0;
1.63 schwarze 324: if (0 < p->skipvsp)
325: p->skipvsp--;
326: else
327: (*p->endline)(p);
1.1 kristaps 328: }
329:
1.20 schwarze 330: void
331: term_fontlast(struct termp *p)
332: {
333: enum termfont f;
1.11 schwarze 334:
1.20 schwarze 335: f = p->fontl;
336: p->fontl = p->fontq[p->fonti];
337: p->fontq[p->fonti] = f;
338: }
339:
340: void
341: term_fontrepl(struct termp *p, enum termfont f)
342: {
343:
344: p->fontl = p->fontq[p->fonti];
345: p->fontq[p->fonti] = f;
1.1 kristaps 346: }
347:
1.20 schwarze 348: void
349: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 350: {
1.7 schwarze 351:
1.20 schwarze 352: assert(p->fonti + 1 < 10);
353: p->fontl = p->fontq[p->fonti];
354: p->fontq[++p->fonti] = f;
355: }
1.1 kristaps 356:
1.20 schwarze 357: const void *
358: term_fontq(struct termp *p)
359: {
1.1 kristaps 360:
1.20 schwarze 361: return(&p->fontq[p->fonti]);
362: }
1.1 kristaps 363:
1.20 schwarze 364: enum termfont
365: term_fonttop(struct termp *p)
366: {
1.1 kristaps 367:
1.20 schwarze 368: return(p->fontq[p->fonti]);
369: }
1.7 schwarze 370:
1.20 schwarze 371: void
372: term_fontpopq(struct termp *p, const void *key)
373: {
1.1 kristaps 374:
1.67 schwarze 375: while (p->fonti >= 0 && key < (void *)(p->fontq + p->fonti))
1.20 schwarze 376: p->fonti--;
377: assert(p->fonti >= 0);
378: }
1.1 kristaps 379:
1.20 schwarze 380: void
381: term_fontpop(struct termp *p)
382: {
1.1 kristaps 383:
1.20 schwarze 384: assert(p->fonti);
385: p->fonti--;
1.1 kristaps 386: }
387:
388: /*
389: * Handle pwords, partial words, which may be either a single word or a
390: * phrase that cannot be broken down (such as a literal string). This
391: * handles word styling.
392: */
1.7 schwarze 393: void
394: term_word(struct termp *p, const char *word)
1.1 kristaps 395: {
1.75 schwarze 396: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.59 schwarze 397: const char *seq, *cp;
398: int sz, uc;
1.20 schwarze 399: size_t ssz;
1.59 schwarze 400: enum mandoc_esc esc;
1.1 kristaps 401:
1.31 schwarze 402: if ( ! (TERMP_NOSPACE & p->flags)) {
1.40 schwarze 403: if ( ! (TERMP_KEEP & p->flags)) {
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: }
1.68 schwarze 410: if (TERMP_PREKEEP & p->flags)
411: p->flags |= TERMP_KEEP;
1.1 kristaps 412:
413: if ( ! (p->flags & TERMP_NONOSPACE))
414: p->flags &= ~TERMP_NOSPACE;
1.46 schwarze 415: else
416: p->flags |= TERMP_NOSPACE;
1.1 kristaps 417:
1.74 schwarze 418: p->flags &= ~TERMP_SENTENCE;
1.31 schwarze 419:
1.59 schwarze 420: while ('\0' != *word) {
1.64 schwarze 421: if ('\\' != *word) {
422: if (TERMP_SKIPCHAR & p->flags) {
423: p->flags &= ~TERMP_SKIPCHAR;
424: word++;
425: continue;
426: }
1.75 schwarze 427: if (TERMP_NBRWORD & p->flags) {
428: if (' ' == *word) {
429: encode(p, nbrsp, 1);
430: word++;
431: continue;
432: }
433: ssz = strcspn(word, "\\ ");
434: } else
435: ssz = strcspn(word, "\\");
1.45 schwarze 436: encode(p, word, ssz);
1.64 schwarze 437: word += (int)ssz;
1.20 schwarze 438: continue;
1.64 schwarze 439: }
1.20 schwarze 440:
1.59 schwarze 441: word++;
442: esc = mandoc_escape(&word, &seq, &sz);
443: if (ESCAPE_ERROR == esc)
1.85 schwarze 444: continue;
1.59 schwarze 445:
446: switch (esc) {
1.83 schwarze 447: case ESCAPE_UNICODE:
1.89 schwarze 448: uc = mchars_num2uc(seq + 1, sz - 1);
1.56 schwarze 449: break;
1.83 schwarze 450: case ESCAPE_NUMBERED:
1.93 schwarze 451: uc = mchars_num2char(seq, sz);
452: if (uc < 0)
453: continue;
1.20 schwarze 454: break;
1.83 schwarze 455: case ESCAPE_SPECIAL:
1.89 schwarze 456: if (p->enc == TERMENC_ASCII) {
457: cp = mchars_spec2str(p->symtab,
458: seq, sz, &ssz);
1.92 schwarze 459: if (cp != NULL)
1.89 schwarze 460: encode(p, cp, ssz);
461: } else {
462: uc = mchars_spec2cp(p->symtab, seq, sz);
1.90 schwarze 463: if (uc > 0)
464: encode1(p, uc);
1.89 schwarze 465: }
1.93 schwarze 466: continue;
1.83 schwarze 467: case ESCAPE_FONTBOLD:
1.20 schwarze 468: term_fontrepl(p, TERMFONT_BOLD);
1.93 schwarze 469: continue;
1.83 schwarze 470: case ESCAPE_FONTITALIC:
1.20 schwarze 471: term_fontrepl(p, TERMFONT_UNDER);
1.93 schwarze 472: continue;
1.83 schwarze 473: case ESCAPE_FONTBI:
1.70 schwarze 474: term_fontrepl(p, TERMFONT_BI);
1.93 schwarze 475: continue;
1.83 schwarze 476: case ESCAPE_FONT:
1.59 schwarze 477: /* FALLTHROUGH */
1.83 schwarze 478: case ESCAPE_FONTROMAN:
1.20 schwarze 479: term_fontrepl(p, TERMFONT_NONE);
1.93 schwarze 480: continue;
1.83 schwarze 481: case ESCAPE_FONTPREV:
1.20 schwarze 482: term_fontlast(p);
1.93 schwarze 483: continue;
1.83 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;
1.93 schwarze 489: continue;
1.83 schwarze 490: case ESCAPE_SKIPCHAR:
1.64 schwarze 491: p->flags |= TERMP_SKIPCHAR;
1.93 schwarze 492: continue;
1.20 schwarze 493: default:
1.93 schwarze 494: continue;
495: }
496:
497: /*
498: * Common handling for Unicode and numbered
499: * character escape sequences.
500: */
501:
502: if (p->enc == TERMENC_ASCII) {
503: cp = ascii_uc2str(uc);
504: encode(p, cp, strlen(cp));
505: } else {
506: if ((uc < 0x20 && uc != 0x09) ||
507: (uc > 0x7E && uc < 0xA0))
508: uc = 0xFFFD;
509: encode1(p, uc);
1.20 schwarze 510: }
511: }
1.75 schwarze 512: p->flags &= ~TERMP_NBRWORD;
1.1 kristaps 513: }
514:
515: static void
1.71 schwarze 516: adjbuf(struct termp *p, size_t sz)
1.1 kristaps 517: {
518:
1.20 schwarze 519: if (0 == p->maxcols)
520: p->maxcols = 1024;
521: while (sz >= p->maxcols)
522: p->maxcols <<= 2;
523:
1.84 schwarze 524: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.1 kristaps 525: }
526:
1.4 schwarze 527: static void
1.20 schwarze 528: bufferc(struct termp *p, char c)
529: {
530:
531: if (p->col + 1 >= p->maxcols)
532: adjbuf(p, p->col + 1);
533:
1.59 schwarze 534: p->buf[p->col++] = c;
1.20 schwarze 535: }
536:
1.59 schwarze 537: /*
538: * See encode().
539: * Do this for a single (probably unicode) value.
540: * Does not check for non-decorated glyphs.
541: */
542: static void
543: encode1(struct termp *p, int c)
544: {
545: enum termfont f;
546:
1.64 schwarze 547: if (TERMP_SKIPCHAR & p->flags) {
548: p->flags &= ~TERMP_SKIPCHAR;
549: return;
550: }
551:
1.70 schwarze 552: if (p->col + 6 >= p->maxcols)
553: adjbuf(p, p->col + 6);
1.59 schwarze 554:
555: f = term_fonttop(p);
556:
1.70 schwarze 557: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.59 schwarze 558: p->buf[p->col++] = '_';
1.70 schwarze 559: p->buf[p->col++] = 8;
560: }
561: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
562: if (ASCII_HYPH == c)
563: p->buf[p->col++] = '-';
564: else
565: p->buf[p->col++] = c;
566: p->buf[p->col++] = 8;
567: }
1.59 schwarze 568: p->buf[p->col++] = c;
569: }
1.20 schwarze 570:
571: static void
572: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 573: {
1.71 schwarze 574: size_t i;
1.59 schwarze 575:
1.64 schwarze 576: if (TERMP_SKIPCHAR & p->flags) {
577: p->flags &= ~TERMP_SKIPCHAR;
578: return;
579: }
580:
1.20 schwarze 581: /*
582: * Encode and buffer a string of characters. If the current
583: * font mode is unset, buffer directly, else encode then buffer
584: * character by character.
585: */
586:
1.70 schwarze 587: if (TERMFONT_NONE == term_fonttop(p)) {
1.83 schwarze 588: if (p->col + sz >= p->maxcols)
1.71 schwarze 589: adjbuf(p, p->col + sz);
590: for (i = 0; i < sz; i++)
1.59 schwarze 591: p->buf[p->col++] = word[i];
1.20 schwarze 592: return;
593: }
594:
1.46 schwarze 595: /* Pre-buffer, assuming worst-case. */
596:
1.71 schwarze 597: if (p->col + 1 + (sz * 5) >= p->maxcols)
598: adjbuf(p, p->col + 1 + (sz * 5));
1.46 schwarze 599:
1.71 schwarze 600: for (i = 0; i < sz; i++) {
1.70 schwarze 601: if (ASCII_HYPH == word[i] ||
602: isgraph((unsigned char)word[i]))
603: encode1(p, word[i]);
1.20 schwarze 604: else
1.59 schwarze 605: p->buf[p->col++] = word[i];
1.4 schwarze 606: }
1.80 schwarze 607: }
608:
609: void
610: term_setwidth(struct termp *p, const char *wstr)
611: {
612: struct roffsu su;
613: size_t width;
614: int iop;
615:
1.81 schwarze 616: iop = 0;
617: width = 0;
1.80 schwarze 618: if (NULL != wstr) {
619: switch (*wstr) {
1.83 schwarze 620: case '+':
1.80 schwarze 621: iop = 1;
622: wstr++;
623: break;
1.83 schwarze 624: case '-':
1.80 schwarze 625: iop = -1;
626: wstr++;
627: break;
628: default:
629: break;
630: }
1.81 schwarze 631: if (a2roffsu(wstr, &su, SCALE_MAX))
632: width = term_hspan(p, &su);
633: else
1.80 schwarze 634: iop = 0;
635: }
636: (*p->setwidth)(p, iop, width);
1.4 schwarze 637: }
1.16 schwarze 638:
639: size_t
1.39 schwarze 640: term_len(const struct termp *p, size_t sz)
641: {
642:
643: return((*p->width)(p, ' ') * sz);
644: }
645:
1.64 schwarze 646: static size_t
647: cond_width(const struct termp *p, int c, int *skip)
648: {
649:
650: if (*skip) {
651: (*skip) = 0;
652: return(0);
653: } else
654: return((*p->width)(p, c));
655: }
1.39 schwarze 656:
657: size_t
658: term_strlen(const struct termp *p, const char *cp)
659: {
1.59 schwarze 660: size_t sz, rsz, i;
1.93 schwarze 661: int ssz, skip, uc;
1.50 schwarze 662: const char *seq, *rhs;
1.59 schwarze 663: enum mandoc_esc esc;
1.77 schwarze 664: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
665: ASCII_BREAK, '\0' };
1.59 schwarze 666:
667: /*
668: * Account for escaped sequences within string length
669: * calculations. This follows the logic in term_word() as we
670: * must calculate the width of produced strings.
671: */
672:
673: sz = 0;
1.64 schwarze 674: skip = 0;
1.59 schwarze 675: while ('\0' != *cp) {
676: rsz = strcspn(cp, rej);
677: for (i = 0; i < rsz; i++)
1.64 schwarze 678: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 679:
680: switch (*cp) {
1.83 schwarze 681: case '\\':
1.59 schwarze 682: cp++;
683: esc = mandoc_escape(&cp, &seq, &ssz);
684: if (ESCAPE_ERROR == esc)
1.85 schwarze 685: continue;
1.59 schwarze 686:
687: rhs = NULL;
1.50 schwarze 688:
1.59 schwarze 689: switch (esc) {
1.83 schwarze 690: case ESCAPE_UNICODE:
1.94 schwarze 691: uc = mchars_num2uc(seq + 1, ssz - 1);
1.59 schwarze 692: break;
1.83 schwarze 693: case ESCAPE_NUMBERED:
1.93 schwarze 694: uc = mchars_num2char(seq, ssz);
695: if (uc < 0)
696: continue;
1.50 schwarze 697: break;
1.83 schwarze 698: case ESCAPE_SPECIAL:
1.93 schwarze 699: if (p->enc == TERMENC_ASCII) {
1.89 schwarze 700: rhs = mchars_spec2str(p->symtab,
701: seq, ssz, &rsz);
1.93 schwarze 702: if (rhs != NULL)
703: break;
704: } else {
705: uc = mchars_spec2cp(p->symtab,
1.89 schwarze 706: seq, ssz);
1.93 schwarze 707: if (uc > 0)
708: sz += cond_width(p, uc, &skip);
1.89 schwarze 709: }
1.93 schwarze 710: continue;
1.83 schwarze 711: case ESCAPE_SKIPCHAR:
1.64 schwarze 712: skip = 1;
1.93 schwarze 713: continue;
1.50 schwarze 714: default:
1.93 schwarze 715: continue;
1.50 schwarze 716: }
1.39 schwarze 717:
1.93 schwarze 718: /*
719: * Common handling for Unicode and numbered
720: * character escape sequences.
721: */
722:
723: if (rhs == NULL) {
724: if (p->enc == TERMENC_ASCII) {
725: rhs = ascii_uc2str(uc);
726: rsz = strlen(rhs);
727: } else {
728: if ((uc < 0x20 && uc != 0x09) ||
729: (uc > 0x7E && uc < 0xA0))
730: uc = 0xFFFD;
731: sz += cond_width(p, uc, &skip);
732: continue;
733: }
734: }
1.59 schwarze 735:
1.64 schwarze 736: if (skip) {
737: skip = 0;
738: break;
739: }
1.93 schwarze 740:
741: /*
742: * Common handling for all escape sequences
743: * printing more than one character.
744: */
1.64 schwarze 745:
1.59 schwarze 746: for (i = 0; i < rsz; i++)
747: sz += (*p->width)(p, *rhs++);
748: break;
1.83 schwarze 749: case ASCII_NBRSP:
1.64 schwarze 750: sz += cond_width(p, ' ', &skip);
1.55 schwarze 751: cp++;
1.59 schwarze 752: break;
1.83 schwarze 753: case ASCII_HYPH:
1.64 schwarze 754: sz += cond_width(p, '-', &skip);
1.55 schwarze 755: cp++;
1.77 schwarze 756: /* FALLTHROUGH */
1.83 schwarze 757: case ASCII_BREAK:
1.59 schwarze 758: break;
759: default:
760: break;
761: }
762: }
1.39 schwarze 763:
764: return(sz);
765: }
766:
767: size_t
768: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 769: {
770: double r;
771:
772: switch (su->unit) {
1.83 schwarze 773: case SCALE_CM:
1.86 schwarze 774: r = su->scale * 2.0;
1.16 schwarze 775: break;
1.83 schwarze 776: case SCALE_IN:
1.86 schwarze 777: r = su->scale * 6.0;
1.16 schwarze 778: break;
1.83 schwarze 779: case SCALE_PC:
1.16 schwarze 780: r = su->scale;
781: break;
1.83 schwarze 782: case SCALE_PT:
1.86 schwarze 783: r = su->scale / 8.0;
1.16 schwarze 784: break;
1.83 schwarze 785: case SCALE_MM:
1.86 schwarze 786: r = su->scale / 1000.0;
1.16 schwarze 787: break;
1.83 schwarze 788: case SCALE_VS:
1.16 schwarze 789: r = su->scale;
790: break;
791: default:
1.86 schwarze 792: r = su->scale - 1.0;
1.16 schwarze 793: break;
794: }
795:
796: if (r < 0.0)
797: r = 0.0;
1.87 schwarze 798: return((size_t)(r + 0.0005));
1.16 schwarze 799: }
800:
801: size_t
1.39 schwarze 802: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 803: {
1.44 schwarze 804: double v;
1.16 schwarze 805:
1.86 schwarze 806: v = (*p->hspan)(p, su);
1.44 schwarze 807: if (v < 0.0)
808: v = 0.0;
1.87 schwarze 809: return((size_t)(v + 0.0005));
1.16 schwarze 810: }
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