Annotation of src/usr.bin/mandoc/term.c, Revision 1.59
1.59 ! schwarze 1: /* $Id: term.c,v 1.58 2011/04/24 16:22:02 schwarze Exp $ */
1.1 kristaps 2: /*
1.59 ! schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.56 schwarze 4: * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.2 schwarze 7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 9: *
1.2 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 kristaps 17: */
1.20 schwarze 18: #include <sys/types.h>
19:
1.1 kristaps 20: #include <assert.h>
1.20 schwarze 21: #include <ctype.h>
1.36 schwarze 22: #include <stdint.h>
1.1 kristaps 23: #include <stdio.h>
24: #include <stdlib.h>
25: #include <string.h>
26:
1.34 schwarze 27: #include "mandoc.h"
1.16 schwarze 28: #include "out.h"
1.1 kristaps 29: #include "term.h"
1.16 schwarze 30: #include "main.h"
1.1 kristaps 31:
1.59 ! schwarze 32: static void adjbuf(struct termp *p, int);
! 33: static void bufferc(struct termp *, char);
! 34: static void encode(struct termp *, const char *, size_t);
! 35: static void encode1(struct termp *, int);
1.1 kristaps 36:
1.37 schwarze 37: void
38: term_free(struct termp *p)
1.1 kristaps 39: {
40:
1.37 schwarze 41: if (p->buf)
42: free(p->buf);
43: if (p->symtab)
1.59 ! schwarze 44: mchars_free(p->symtab);
1.37 schwarze 45:
46: free(p);
1.1 kristaps 47: }
48:
49:
1.13 schwarze 50: void
1.37 schwarze 51: term_begin(struct termp *p, term_margin head,
52: term_margin foot, const void *arg)
1.1 kristaps 53: {
54:
1.37 schwarze 55: p->headf = head;
56: p->footf = foot;
57: p->argf = arg;
58: (*p->begin)(p);
1.1 kristaps 59: }
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: /*
70: * Flush a line of text. A "line" is loosely defined as being something
71: * that should be followed by a newline, regardless of whether it's
72: * broken apart by newlines getting there. A line can also be a
1.27 schwarze 73: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
74: * not have a trailing newline.
1.1 kristaps 75: *
1.27 schwarze 76: * The following flags may be specified:
1.1 kristaps 77: *
78: * - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
79: * offset value. This is useful when doing columnar lists where the
80: * prior column has right-padded.
81: *
82: * - TERMP_NOBREAK: this is the most important and is used when making
83: * columns. In short: don't print a newline and instead pad to the
84: * right margin. Used in conjunction with TERMP_NOLPAD.
85: *
1.9 schwarze 86: * - TERMP_TWOSPACE: when padding, make sure there are at least two
87: * space characters of padding. Otherwise, rather break the line.
88: *
1.6 schwarze 89: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
90: * the line is overrun, and don't pad-right if it's underrun.
91: *
92: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
93: * overruning, instead save the position and continue at that point
94: * when the next invocation.
1.1 kristaps 95: *
96: * In-line line breaking:
97: *
98: * If TERMP_NOBREAK is specified and the line overruns the right
99: * margin, it will break and pad-right to the right margin after
100: * writing. If maxrmargin is violated, it will break and continue
1.19 schwarze 101: * writing from the right-margin, which will lead to the above scenario
102: * upon exit. Otherwise, the line will break at the right margin.
1.1 kristaps 103: */
104: void
105: term_flushln(struct termp *p)
106: {
1.19 schwarze 107: int i; /* current input position in p->buf */
108: size_t vis; /* current visual position on output */
109: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 110: size_t vend; /* end of word visual position on output */
1.19 schwarze 111: size_t bp; /* visual right border position */
1.51 schwarze 112: size_t dv; /* temporary for visual pos calculations */
1.42 schwarze 113: int j; /* temporary loop index for p->buf */
114: int jhy; /* last hyph before overflow w/r/t j */
115: size_t maxvis; /* output position of visible boundary */
116: size_t mmax; /* used in calculating bp */
1.1 kristaps 117:
118: /*
119: * First, establish the maximum columns of "visible" content.
120: * This is usually the difference between the right-margin and
121: * an indentation, but can be, for tagged lists or columns, a
1.19 schwarze 122: * small set of values.
1.1 kristaps 123: */
1.54 schwarze 124: assert (p->rmargin >= p->offset);
1.53 schwarze 125: dv = p->rmargin - p->offset;
126: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
127: dv = p->maxrmargin - p->offset;
128: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.9 schwarze 129:
1.1 kristaps 130: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.19 schwarze 131:
1.33 schwarze 132: /*
133: * Indent the first line of a paragraph.
134: */
1.53 schwarze 135: vbl = p->flags & TERMP_NOLPAD ? (size_t)0 : p->offset;
1.33 schwarze 136:
1.53 schwarze 137: vis = vend = 0;
138: i = 0;
1.19 schwarze 139:
1.59 ! schwarze 140: while (i < p->col) {
1.22 schwarze 141: /*
1.42 schwarze 142: * Handle literal tab characters: collapse all
143: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 144: */
1.59 ! schwarze 145: while (i < p->col && '\t' == p->buf[i]) {
1.42 schwarze 146: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.30 schwarze 147: vbl += vend - vis;
148: vis = vend;
1.49 schwarze 149: i++;
1.30 schwarze 150: }
1.22 schwarze 151:
1.1 kristaps 152: /*
153: * Count up visible word characters. Control sequences
154: * (starting with the CSI) aren't counted. A space
155: * generates a non-printing word, which is valid (the
156: * space is printed according to regular spacing rules).
157: */
158:
1.59 ! schwarze 159: for (j = i, jhy = 0; j < p->col; j++) {
1.30 schwarze 160: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.1 kristaps 161: break;
1.42 schwarze 162:
163: /* Back over the the last printed character. */
164: if (8 == p->buf[j]) {
165: assert(j);
166: vend -= (*p->width)(p, p->buf[j - 1]);
167: continue;
168: }
169:
170: /* Regular word. */
171: /* Break at the hyphen point if we overrun. */
172: if (vend > vis && vend < bp &&
173: ASCII_HYPH == p->buf[j])
174: jhy = j;
175:
176: vend += (*p->width)(p, p->buf[j]);
1.1 kristaps 177: }
178:
179: /*
1.5 schwarze 180: * Find out whether we would exceed the right margin.
1.33 schwarze 181: * If so, break to the next line.
1.5 schwarze 182: */
1.33 schwarze 183: if (vend > bp && 0 == jhy && vis > 0) {
1.22 schwarze 184: vend -= vis;
1.37 schwarze 185: (*p->endline)(p);
1.5 schwarze 186: if (TERMP_NOBREAK & p->flags) {
1.29 schwarze 187: p->viscol = p->rmargin;
1.37 schwarze 188: (*p->advance)(p, p->rmargin);
1.22 schwarze 189: vend += p->rmargin - p->offset;
1.5 schwarze 190: } else {
1.33 schwarze 191: p->viscol = 0;
192: vbl = p->offset;
1.5 schwarze 193: }
1.33 schwarze 194:
1.26 schwarze 195: /* Remove the p->overstep width. */
1.33 schwarze 196:
1.53 schwarze 197: bp += (size_t)p->overstep;
1.26 schwarze 198: p->overstep = 0;
1.1 kristaps 199: }
1.30 schwarze 200:
1.33 schwarze 201: /* Write out the [remaining] word. */
1.59 ! schwarze 202: for ( ; i < p->col; i++) {
1.25 schwarze 203: if (vend > bp && jhy > 0 && i > jhy)
1.30 schwarze 204: break;
205: if ('\t' == p->buf[i])
1.1 kristaps 206: break;
1.22 schwarze 207: if (' ' == p->buf[i]) {
1.46 schwarze 208: j = i;
209: while (' ' == p->buf[i])
1.33 schwarze 210: i++;
1.53 schwarze 211: dv = (size_t)(i - j) * (*p->width)(p, ' ');
1.51 schwarze 212: vbl += dv;
213: vend += dv;
1.22 schwarze 214: break;
215: }
1.33 schwarze 216: if (ASCII_NBRSP == p->buf[i]) {
1.42 schwarze 217: vbl += (*p->width)(p, ' ');
1.33 schwarze 218: continue;
219: }
220:
221: /*
222: * Now we definitely know there will be
223: * printable characters to output,
224: * so write preceding white space now.
225: */
226: if (vbl) {
1.37 schwarze 227: (*p->advance)(p, vbl);
1.33 schwarze 228: p->viscol += vbl;
229: vbl = 0;
230: }
1.35 schwarze 231:
1.42 schwarze 232: if (ASCII_HYPH == p->buf[i]) {
1.37 schwarze 233: (*p->letter)(p, '-');
1.42 schwarze 234: p->viscol += (*p->width)(p, '-');
235: } else {
1.37 schwarze 236: (*p->letter)(p, p->buf[i]);
1.42 schwarze 237: p->viscol += (*p->width)(p, p->buf[i]);
238: }
1.1 kristaps 239: }
1.22 schwarze 240: vis = vend;
1.1 kristaps 241: }
1.48 schwarze 242:
243: /*
244: * If there was trailing white space, it was not printed;
245: * so reset the cursor position accordingly.
246: */
247: vis -= vbl;
1.18 schwarze 248:
1.9 schwarze 249: p->col = 0;
1.26 schwarze 250: p->overstep = 0;
1.1 kristaps 251:
1.9 schwarze 252: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 253: p->viscol = 0;
1.37 schwarze 254: (*p->endline)(p);
1.1 kristaps 255: return;
256: }
257:
1.9 schwarze 258: if (TERMP_HANG & p->flags) {
259: /* We need one blank after the tag. */
1.53 schwarze 260: p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
1.9 schwarze 261:
262: /*
263: * Behave exactly the same way as groff:
264: * If we have overstepped the margin, temporarily move
265: * it to the right and flag the rest of the line to be
266: * shorter.
267: * If we landed right at the margin, be happy.
268: * If we are one step before the margin, temporarily
269: * move it one step LEFT and flag the rest of the line
270: * to be longer.
271: */
1.26 schwarze 272: if (p->overstep >= -1) {
273: assert((int)maxvis + p->overstep >= 0);
1.53 schwarze 274: maxvis += (size_t)p->overstep;
1.9 schwarze 275: } else
1.26 schwarze 276: p->overstep = 0;
1.9 schwarze 277:
278: } else if (TERMP_DANGLE & p->flags)
279: return;
1.1 kristaps 280:
1.9 schwarze 281: /* Right-pad. */
1.53 schwarze 282: if (maxvis > vis +
283: ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
1.29 schwarze 284: p->viscol += maxvis - vis;
1.37 schwarze 285: (*p->advance)(p, maxvis - vis);
286: vis += (maxvis - vis);
1.29 schwarze 287: } else { /* ...or newline break. */
1.37 schwarze 288: (*p->endline)(p);
1.29 schwarze 289: p->viscol = p->rmargin;
1.37 schwarze 290: (*p->advance)(p, p->rmargin);
1.9 schwarze 291: }
1.1 kristaps 292: }
293:
294:
295: /*
296: * A newline only breaks an existing line; it won't assert vertical
297: * space. All data in the output buffer is flushed prior to the newline
298: * assertion.
299: */
300: void
301: term_newln(struct termp *p)
302: {
303:
304: p->flags |= TERMP_NOSPACE;
1.29 schwarze 305: if (0 == p->col && 0 == p->viscol) {
1.1 kristaps 306: p->flags &= ~TERMP_NOLPAD;
307: return;
308: }
309: term_flushln(p);
310: p->flags &= ~TERMP_NOLPAD;
311: }
312:
313:
314: /*
315: * Asserts a vertical space (a full, empty line-break between lines).
316: * Note that if used twice, this will cause two blank spaces and so on.
317: * All data in the output buffer is flushed prior to the newline
318: * assertion.
319: */
320: void
321: term_vspace(struct termp *p)
322: {
323:
324: term_newln(p);
1.29 schwarze 325: p->viscol = 0;
1.37 schwarze 326: (*p->endline)(p);
1.1 kristaps 327: }
328:
1.20 schwarze 329: void
330: term_fontlast(struct termp *p)
331: {
332: enum termfont f;
1.11 schwarze 333:
1.20 schwarze 334: f = p->fontl;
335: p->fontl = p->fontq[p->fonti];
336: p->fontq[p->fonti] = f;
337: }
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:
348:
1.20 schwarze 349: void
350: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 351: {
1.7 schwarze 352:
1.20 schwarze 353: assert(p->fonti + 1 < 10);
354: p->fontl = p->fontq[p->fonti];
355: p->fontq[++p->fonti] = f;
356: }
1.1 kristaps 357:
358:
1.20 schwarze 359: const void *
360: term_fontq(struct termp *p)
361: {
1.1 kristaps 362:
1.20 schwarze 363: return(&p->fontq[p->fonti]);
364: }
1.1 kristaps 365:
366:
1.20 schwarze 367: enum termfont
368: term_fonttop(struct termp *p)
369: {
1.1 kristaps 370:
1.20 schwarze 371: return(p->fontq[p->fonti]);
372: }
1.7 schwarze 373:
374:
1.20 schwarze 375: void
376: term_fontpopq(struct termp *p, const void *key)
377: {
1.1 kristaps 378:
1.20 schwarze 379: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
380: p->fonti--;
381: assert(p->fonti >= 0);
382: }
1.1 kristaps 383:
384:
1.20 schwarze 385: void
386: term_fontpop(struct termp *p)
387: {
1.1 kristaps 388:
1.20 schwarze 389: assert(p->fonti);
390: p->fonti--;
1.1 kristaps 391: }
392:
393: /*
394: * Handle pwords, partial words, which may be either a single word or a
395: * phrase that cannot be broken down (such as a literal string). This
396: * handles word styling.
397: */
1.7 schwarze 398: void
399: term_word(struct termp *p, const char *word)
1.1 kristaps 400: {
1.59 ! schwarze 401: const char *seq, *cp;
! 402: char c;
! 403: int sz, uc;
1.20 schwarze 404: size_t ssz;
1.59 ! schwarze 405: enum mandoc_esc esc;
1.1 kristaps 406:
1.31 schwarze 407: if ( ! (TERMP_NOSPACE & p->flags)) {
1.40 schwarze 408: if ( ! (TERMP_KEEP & p->flags)) {
409: if (TERMP_PREKEEP & p->flags)
410: p->flags |= TERMP_KEEP;
1.31 schwarze 411: bufferc(p, ' ');
1.40 schwarze 412: if (TERMP_SENTENCE & p->flags)
413: bufferc(p, ' ');
414: } else
415: bufferc(p, ASCII_NBRSP);
1.31 schwarze 416: }
1.1 kristaps 417:
418: if ( ! (p->flags & TERMP_NONOSPACE))
419: p->flags &= ~TERMP_NOSPACE;
1.46 schwarze 420: else
421: p->flags |= TERMP_NOSPACE;
1.1 kristaps 422:
1.52 schwarze 423: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
1.31 schwarze 424:
1.59 ! schwarze 425: while ('\0' != *word) {
1.45 schwarze 426: if ((ssz = strcspn(word, "\\")) > 0)
427: encode(p, word, ssz);
1.20 schwarze 428:
1.57 schwarze 429: word += (int)ssz;
1.45 schwarze 430: if ('\\' != *word)
1.20 schwarze 431: continue;
432:
1.59 ! schwarze 433: word++;
! 434: esc = mandoc_escape(&word, &seq, &sz);
! 435: if (ESCAPE_ERROR == esc)
! 436: break;
! 437:
! 438: if (TERMENC_ASCII != p->enc)
! 439: switch (esc) {
! 440: case (ESCAPE_UNICODE):
! 441: uc = mchars_num2uc(seq + 1, sz - 1);
! 442: if ('\0' == uc)
! 443: break;
! 444: encode1(p, uc);
! 445: continue;
! 446: case (ESCAPE_SPECIAL):
! 447: uc = mchars_spec2cp(p->symtab, seq, sz);
! 448: if (uc <= 0)
! 449: break;
! 450: encode1(p, uc);
! 451: continue;
! 452: default:
! 453: break;
! 454: }
1.20 schwarze 455:
1.59 ! schwarze 456: switch (esc) {
! 457: case (ESCAPE_UNICODE):
! 458: encode1(p, '?');
1.56 schwarze 459: break;
1.59 ! schwarze 460: case (ESCAPE_NUMBERED):
! 461: c = mchars_num2char(seq, sz);
! 462: if ('\0' != c)
! 463: encode(p, &c, 1);
1.20 schwarze 464: break;
1.59 ! schwarze 465: case (ESCAPE_SPECIAL):
! 466: cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
! 467: if (NULL != cp)
! 468: encode(p, cp, ssz);
! 469: else if (1 == ssz)
! 470: encode(p, seq, sz);
1.20 schwarze 471: break;
1.59 ! schwarze 472: case (ESCAPE_FONTBOLD):
1.20 schwarze 473: term_fontrepl(p, TERMFONT_BOLD);
474: break;
1.59 ! schwarze 475: case (ESCAPE_FONTITALIC):
1.20 schwarze 476: term_fontrepl(p, TERMFONT_UNDER);
477: break;
1.59 ! schwarze 478: case (ESCAPE_FONT):
! 479: /* FALLTHROUGH */
! 480: case (ESCAPE_FONTROMAN):
1.20 schwarze 481: term_fontrepl(p, TERMFONT_NONE);
482: break;
1.59 ! schwarze 483: case (ESCAPE_FONTPREV):
1.20 schwarze 484: term_fontlast(p);
485: break;
1.59 ! schwarze 486: case (ESCAPE_NOSPACE):
! 487: if ('\0' == *word)
! 488: p->flags |= TERMP_NOSPACE;
! 489: break;
1.20 schwarze 490: default:
491: break;
492: }
493: }
1.1 kristaps 494: }
495:
496: static void
1.59 ! schwarze 497: adjbuf(struct termp *p, int sz)
1.1 kristaps 498: {
499:
1.20 schwarze 500: if (0 == p->maxcols)
501: p->maxcols = 1024;
502: while (sz >= p->maxcols)
503: p->maxcols <<= 2;
504:
1.59 ! schwarze 505: p->buf = mandoc_realloc
! 506: (p->buf, sizeof(int) * (size_t)p->maxcols);
1.1 kristaps 507: }
508:
1.4 schwarze 509: static void
1.20 schwarze 510: bufferc(struct termp *p, char c)
511: {
512:
513: if (p->col + 1 >= p->maxcols)
514: adjbuf(p, p->col + 1);
515:
1.59 ! schwarze 516: p->buf[p->col++] = c;
1.20 schwarze 517: }
518:
1.59 ! schwarze 519: /*
! 520: * See encode().
! 521: * Do this for a single (probably unicode) value.
! 522: * Does not check for non-decorated glyphs.
! 523: */
! 524: static void
! 525: encode1(struct termp *p, int c)
! 526: {
! 527: enum termfont f;
! 528:
! 529: if (p->col + 4 >= p->maxcols)
! 530: adjbuf(p, p->col + 4);
! 531:
! 532: f = term_fonttop(p);
! 533:
! 534: if (TERMFONT_NONE == f) {
! 535: p->buf[p->col++] = c;
! 536: return;
! 537: } else if (TERMFONT_UNDER == f) {
! 538: p->buf[p->col++] = '_';
! 539: } else
! 540: p->buf[p->col++] = c;
! 541:
! 542: p->buf[p->col++] = 8;
! 543: p->buf[p->col++] = c;
! 544: }
1.20 schwarze 545:
546: static void
547: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 548: {
1.20 schwarze 549: enum termfont f;
1.59 ! schwarze 550: int i, len;
! 551:
! 552: /* LINTED */
! 553: len = sz;
1.20 schwarze 554:
555: /*
556: * Encode and buffer a string of characters. If the current
557: * font mode is unset, buffer directly, else encode then buffer
558: * character by character.
559: */
560:
1.38 schwarze 561: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.59 ! schwarze 562: if (p->col + len >= p->maxcols)
! 563: adjbuf(p, p->col + len);
! 564: for (i = 0; i < len; i++)
! 565: p->buf[p->col++] = word[i];
1.20 schwarze 566: return;
567: }
568:
1.46 schwarze 569: /* Pre-buffer, assuming worst-case. */
570:
1.59 ! schwarze 571: if (p->col + 1 + (len * 3) >= p->maxcols)
! 572: adjbuf(p, p->col + 1 + (len * 3));
1.46 schwarze 573:
1.59 ! schwarze 574: for (i = 0; i < len; i++) {
! 575: if ( ! isgraph((unsigned char)word[i])) {
! 576: p->buf[p->col++] = word[i];
1.20 schwarze 577: continue;
1.4 schwarze 578: }
1.20 schwarze 579:
580: if (TERMFONT_UNDER == f)
1.59 ! schwarze 581: p->buf[p->col++] = '_';
1.20 schwarze 582: else
1.59 ! schwarze 583: p->buf[p->col++] = word[i];
1.20 schwarze 584:
1.59 ! schwarze 585: p->buf[p->col++] = 8;
! 586: p->buf[p->col++] = word[i];
1.4 schwarze 587: }
588: }
1.16 schwarze 589:
590: size_t
1.39 schwarze 591: term_len(const struct termp *p, size_t sz)
592: {
593:
594: return((*p->width)(p, ' ') * sz);
595: }
596:
597:
598: size_t
599: term_strlen(const struct termp *p, const char *cp)
600: {
1.59 ! schwarze 601: size_t sz, rsz, i;
! 602: int ssz, c;
1.50 schwarze 603: const char *seq, *rhs;
1.59 ! schwarze 604: enum mandoc_esc esc;
! 605: static const char rej[] = { '\\', ASCII_HYPH, ASCII_NBRSP, '\0' };
! 606:
! 607: /*
! 608: * Account for escaped sequences within string length
! 609: * calculations. This follows the logic in term_word() as we
! 610: * must calculate the width of produced strings.
! 611: */
! 612:
! 613: sz = 0;
! 614: while ('\0' != *cp) {
! 615: rsz = strcspn(cp, rej);
! 616: for (i = 0; i < rsz; i++)
! 617: sz += (*p->width)(p, *cp++);
! 618:
! 619: c = 0;
! 620: switch (*cp) {
! 621: case ('\\'):
! 622: cp++;
! 623: esc = mandoc_escape(&cp, &seq, &ssz);
! 624: if (ESCAPE_ERROR == esc)
! 625: return(sz);
! 626:
! 627: if (TERMENC_ASCII != p->enc)
! 628: switch (esc) {
! 629: case (ESCAPE_UNICODE):
! 630: c = mchars_num2uc
! 631: (seq + 1, ssz - 1);
! 632: if ('\0' == c)
! 633: break;
! 634: sz += (*p->width)(p, c);
! 635: continue;
! 636: case (ESCAPE_SPECIAL):
! 637: c = mchars_spec2cp
! 638: (p->symtab, seq, ssz);
! 639: if (c <= 0)
! 640: break;
! 641: sz += (*p->width)(p, c);
! 642: continue;
! 643: default:
! 644: break;
! 645: }
! 646:
! 647: rhs = NULL;
1.50 schwarze 648:
1.59 ! schwarze 649: switch (esc) {
! 650: case (ESCAPE_UNICODE):
! 651: sz += (*p->width)(p, '?');
! 652: break;
! 653: case (ESCAPE_NUMBERED):
! 654: c = mchars_num2char(seq, ssz);
! 655: if ('\0' != c)
! 656: sz += (*p->width)(p, c);
1.50 schwarze 657: break;
1.59 ! schwarze 658: case (ESCAPE_SPECIAL):
! 659: rhs = mchars_spec2str
1.50 schwarze 660: (p->symtab, seq, ssz, &rsz);
661:
1.59 ! schwarze 662: if (ssz != 1 || rhs)
1.50 schwarze 663: break;
664:
665: rhs = seq;
666: rsz = ssz;
667: break;
668: default:
669: break;
670: }
1.39 schwarze 671:
1.59 ! schwarze 672: if (NULL == rhs)
! 673: break;
! 674:
! 675: for (i = 0; i < rsz; i++)
! 676: sz += (*p->width)(p, *rhs++);
! 677: break;
! 678: case (ASCII_NBRSP):
1.55 schwarze 679: sz += (*p->width)(p, ' ');
680: cp++;
1.59 ! schwarze 681: break;
! 682: case (ASCII_HYPH):
1.55 schwarze 683: sz += (*p->width)(p, '-');
684: cp++;
1.59 ! schwarze 685: break;
! 686: default:
! 687: break;
! 688: }
! 689: }
1.39 schwarze 690:
691: return(sz);
692: }
693:
1.44 schwarze 694: /* ARGSUSED */
1.39 schwarze 695: size_t
696: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 697: {
698: double r;
699:
700: switch (su->unit) {
701: case (SCALE_CM):
702: r = su->scale * 2;
703: break;
704: case (SCALE_IN):
705: r = su->scale * 6;
706: break;
707: case (SCALE_PC):
708: r = su->scale;
709: break;
710: case (SCALE_PT):
711: r = su->scale / 8;
712: break;
713: case (SCALE_MM):
714: r = su->scale / 1000;
715: break;
716: case (SCALE_VS):
717: r = su->scale;
718: break;
719: default:
720: r = su->scale - 1;
721: break;
722: }
723:
724: if (r < 0.0)
725: r = 0.0;
726: return(/* LINTED */(size_t)
727: r);
728: }
729:
730: size_t
1.39 schwarze 731: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 732: {
1.44 schwarze 733: double v;
1.16 schwarze 734:
1.44 schwarze 735: v = ((*p->hspan)(p, su));
736: if (v < 0.0)
737: v = 0.0;
738: return((size_t) /* LINTED */
739: v);
1.16 schwarze 740: }
![[BACK]](/icons/back.gif){kind=icon}
Return to term.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / mandoc