Annotation of src/usr.bin/mandoc/term.c, Revision 1.65
1.65 ! schwarze 1: /* $Id: term.c,v 1.64 2012/05/28 13:00:51 schwarze Exp $ */
1.1 kristaps 2: /*
1.59 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.63 schwarze 4: * Copyright (c) 2010, 2011, 2012 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:
1.64 schwarze 32: static size_t cond_width(const struct termp *, int, int *);
1.59 schwarze 33: static void adjbuf(struct termp *p, int);
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:
1.37 schwarze 38: void
39: term_free(struct termp *p)
1.1 kristaps 40: {
41:
1.37 schwarze 42: if (p->buf)
43: free(p->buf);
44: if (p->symtab)
1.59 schwarze 45: mchars_free(p->symtab);
1.37 schwarze 46:
47: free(p);
1.1 kristaps 48: }
49:
50:
1.13 schwarze 51: void
1.37 schwarze 52: term_begin(struct termp *p, term_margin head,
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:
62:
1.37 schwarze 63: void
64: term_end(struct termp *p)
1.1 kristaps 65: {
66:
1.37 schwarze 67: (*p->end)(p);
1.1 kristaps 68: }
69:
70: /*
71: * Flush a line of text. A "line" is loosely defined as being something
72: * that should be followed by a newline, regardless of whether it's
73: * broken apart by newlines getting there. A line can also be a
1.27 schwarze 74: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
75: * not have a trailing newline.
1.1 kristaps 76: *
1.27 schwarze 77: * The following flags may be specified:
1.1 kristaps 78: *
79: * - TERMP_NOBREAK: this is the most important and is used when making
1.61 schwarze 80: * columns. In short: don't print a newline and instead expect the
81: * next call to do the padding up to the start of the next column.
1.1 kristaps 82: *
1.61 schwarze 83: * - TERMP_TWOSPACE: make sure there is room for at least two space
84: * characters of padding. Otherwise, rather break the line.
1.9 schwarze 85: *
1.6 schwarze 86: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
87: * the line is overrun, and don't pad-right if it's underrun.
88: *
89: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
1.61 schwarze 90: * overrunning, instead save the position and continue at that point
1.6 schwarze 91: * when the next invocation.
1.1 kristaps 92: *
93: * In-line line breaking:
94: *
95: * If TERMP_NOBREAK is specified and the line overruns the right
96: * margin, it will break and pad-right to the right margin after
97: * writing. If maxrmargin is violated, it will break and continue
1.19 schwarze 98: * writing from the right-margin, which will lead to the above scenario
99: * upon exit. Otherwise, the line will break at the right margin.
1.1 kristaps 100: */
101: void
102: term_flushln(struct termp *p)
103: {
1.19 schwarze 104: int i; /* current input position in p->buf */
105: size_t vis; /* current visual position on output */
106: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 107: size_t vend; /* end of word visual position on output */
1.19 schwarze 108: size_t bp; /* visual right border position */
1.51 schwarze 109: size_t dv; /* temporary for visual pos calculations */
1.42 schwarze 110: int j; /* temporary loop index for p->buf */
111: int jhy; /* last hyph before overflow w/r/t j */
112: size_t maxvis; /* output position of visible boundary */
113: size_t mmax; /* used in calculating bp */
1.1 kristaps 114:
115: /*
116: * First, establish the maximum columns of "visible" content.
117: * This is usually the difference between the right-margin and
118: * an indentation, but can be, for tagged lists or columns, a
1.19 schwarze 119: * small set of values.
1.1 kristaps 120: */
1.54 schwarze 121: assert (p->rmargin >= p->offset);
1.53 schwarze 122: dv = p->rmargin - p->offset;
123: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
124: dv = p->maxrmargin - p->offset;
125: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.9 schwarze 126:
1.1 kristaps 127: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.19 schwarze 128:
1.33 schwarze 129: /*
1.61 schwarze 130: * Calculate the required amount of padding.
1.33 schwarze 131: */
1.61 schwarze 132: vbl = p->offset + p->overstep > p->viscol ?
133: p->offset + p->overstep - p->viscol : 0;
1.33 schwarze 134:
1.53 schwarze 135: vis = vend = 0;
136: i = 0;
1.19 schwarze 137:
1.59 schwarze 138: while (i < p->col) {
1.22 schwarze 139: /*
1.42 schwarze 140: * Handle literal tab characters: collapse all
141: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 142: */
1.59 schwarze 143: while (i < p->col && '\t' == p->buf[i]) {
1.42 schwarze 144: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.30 schwarze 145: vbl += vend - vis;
146: vis = vend;
1.49 schwarze 147: i++;
1.30 schwarze 148: }
1.22 schwarze 149:
1.1 kristaps 150: /*
151: * Count up visible word characters. Control sequences
152: * (starting with the CSI) aren't counted. A space
153: * generates a non-printing word, which is valid (the
154: * space is printed according to regular spacing rules).
155: */
156:
1.59 schwarze 157: for (j = i, jhy = 0; j < p->col; j++) {
1.30 schwarze 158: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.1 kristaps 159: break;
1.42 schwarze 160:
161: /* Back over the the last printed character. */
162: if (8 == p->buf[j]) {
163: assert(j);
164: vend -= (*p->width)(p, p->buf[j - 1]);
165: continue;
166: }
167:
168: /* Regular word. */
169: /* Break at the hyphen point if we overrun. */
170: if (vend > vis && vend < bp &&
171: ASCII_HYPH == p->buf[j])
172: jhy = j;
173:
174: vend += (*p->width)(p, p->buf[j]);
1.1 kristaps 175: }
176:
177: /*
1.5 schwarze 178: * Find out whether we would exceed the right margin.
1.33 schwarze 179: * If so, break to the next line.
1.5 schwarze 180: */
1.33 schwarze 181: if (vend > bp && 0 == jhy && vis > 0) {
1.22 schwarze 182: vend -= vis;
1.37 schwarze 183: (*p->endline)(p);
1.62 schwarze 184: p->viscol = 0;
1.5 schwarze 185: if (TERMP_NOBREAK & p->flags) {
1.62 schwarze 186: vbl = p->rmargin;
1.22 schwarze 187: vend += p->rmargin - p->offset;
1.62 schwarze 188: } else
1.33 schwarze 189: vbl = p->offset;
190:
1.26 schwarze 191: /* Remove the p->overstep width. */
1.33 schwarze 192:
1.53 schwarze 193: bp += (size_t)p->overstep;
1.26 schwarze 194: p->overstep = 0;
1.1 kristaps 195: }
1.30 schwarze 196:
1.33 schwarze 197: /* Write out the [remaining] word. */
1.59 schwarze 198: for ( ; i < p->col; i++) {
1.25 schwarze 199: if (vend > bp && jhy > 0 && i > jhy)
1.30 schwarze 200: break;
201: if ('\t' == p->buf[i])
1.1 kristaps 202: break;
1.22 schwarze 203: if (' ' == p->buf[i]) {
1.46 schwarze 204: j = i;
205: while (' ' == p->buf[i])
1.33 schwarze 206: i++;
1.53 schwarze 207: dv = (size_t)(i - j) * (*p->width)(p, ' ');
1.51 schwarze 208: vbl += dv;
209: vend += dv;
1.22 schwarze 210: break;
211: }
1.33 schwarze 212: if (ASCII_NBRSP == p->buf[i]) {
1.42 schwarze 213: vbl += (*p->width)(p, ' ');
1.33 schwarze 214: continue;
215: }
216:
217: /*
218: * Now we definitely know there will be
219: * printable characters to output,
220: * so write preceding white space now.
221: */
222: if (vbl) {
1.37 schwarze 223: (*p->advance)(p, vbl);
1.33 schwarze 224: p->viscol += vbl;
225: vbl = 0;
226: }
1.35 schwarze 227:
1.42 schwarze 228: if (ASCII_HYPH == p->buf[i]) {
1.37 schwarze 229: (*p->letter)(p, '-');
1.42 schwarze 230: p->viscol += (*p->width)(p, '-');
1.61 schwarze 231: continue;
232: }
233:
234: (*p->letter)(p, p->buf[i]);
235: if (8 == p->buf[i])
236: p->viscol -= (*p->width)(p, p->buf[i-1]);
237: else
1.42 schwarze 238: p->viscol += (*p->width)(p, p->buf[i]);
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: */
1.61 schwarze 247: if (vis)
248: vis -= vbl;
1.18 schwarze 249:
1.9 schwarze 250: p->col = 0;
1.26 schwarze 251: p->overstep = 0;
1.1 kristaps 252:
1.9 schwarze 253: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 254: p->viscol = 0;
1.37 schwarze 255: (*p->endline)(p);
1.1 kristaps 256: return;
257: }
258:
1.9 schwarze 259: if (TERMP_HANG & p->flags) {
260: /* We need one blank after the tag. */
1.53 schwarze 261: p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
1.9 schwarze 262:
263: /*
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: */
1.65 ! schwarze 268: if (p->overstep < 0)
1.26 schwarze 269: p->overstep = 0;
1.61 schwarze 270: return;
1.9 schwarze 271:
272: } else if (TERMP_DANGLE & p->flags)
273: return;
1.1 kristaps 274:
1.61 schwarze 275: /* If the column was overrun, break the line. */
276: if (maxvis <= vis +
1.53 schwarze 277: ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
1.37 schwarze 278: (*p->endline)(p);
1.61 schwarze 279: p->viscol = 0;
1.9 schwarze 280: }
1.1 kristaps 281: }
282:
283:
284: /*
285: * A newline only breaks an existing line; it won't assert vertical
286: * space. All data in the output buffer is flushed prior to the newline
287: * assertion.
288: */
289: void
290: term_newln(struct termp *p)
291: {
292:
293: p->flags |= TERMP_NOSPACE;
1.61 schwarze 294: if (p->col || p->viscol)
295: term_flushln(p);
1.1 kristaps 296: }
297:
298:
299: /*
300: * Asserts a vertical space (a full, empty line-break between lines).
301: * Note that if used twice, this will cause two blank spaces and so on.
302: * All data in the output buffer is flushed prior to the newline
303: * assertion.
304: */
305: void
306: term_vspace(struct termp *p)
307: {
308:
309: term_newln(p);
1.29 schwarze 310: p->viscol = 0;
1.63 schwarze 311: if (0 < p->skipvsp)
312: p->skipvsp--;
313: else
314: (*p->endline)(p);
1.1 kristaps 315: }
316:
1.20 schwarze 317: void
318: term_fontlast(struct termp *p)
319: {
320: enum termfont f;
1.11 schwarze 321:
1.20 schwarze 322: f = p->fontl;
323: p->fontl = p->fontq[p->fonti];
324: p->fontq[p->fonti] = f;
325: }
326:
327:
328: void
329: term_fontrepl(struct termp *p, enum termfont f)
330: {
331:
332: p->fontl = p->fontq[p->fonti];
333: p->fontq[p->fonti] = f;
1.1 kristaps 334: }
335:
336:
1.20 schwarze 337: void
338: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 339: {
1.7 schwarze 340:
1.20 schwarze 341: assert(p->fonti + 1 < 10);
342: p->fontl = p->fontq[p->fonti];
343: p->fontq[++p->fonti] = f;
344: }
1.1 kristaps 345:
346:
1.20 schwarze 347: const void *
348: term_fontq(struct termp *p)
349: {
1.1 kristaps 350:
1.20 schwarze 351: return(&p->fontq[p->fonti]);
352: }
1.1 kristaps 353:
354:
1.20 schwarze 355: enum termfont
356: term_fonttop(struct termp *p)
357: {
1.1 kristaps 358:
1.20 schwarze 359: return(p->fontq[p->fonti]);
360: }
1.7 schwarze 361:
362:
1.20 schwarze 363: void
364: term_fontpopq(struct termp *p, const void *key)
365: {
1.1 kristaps 366:
1.20 schwarze 367: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
368: p->fonti--;
369: assert(p->fonti >= 0);
370: }
1.1 kristaps 371:
372:
1.20 schwarze 373: void
374: term_fontpop(struct termp *p)
375: {
1.1 kristaps 376:
1.20 schwarze 377: assert(p->fonti);
378: p->fonti--;
1.1 kristaps 379: }
380:
381: /*
382: * Handle pwords, partial words, which may be either a single word or a
383: * phrase that cannot be broken down (such as a literal string). This
384: * handles word styling.
385: */
1.7 schwarze 386: void
387: term_word(struct termp *p, const char *word)
1.1 kristaps 388: {
1.59 schwarze 389: const char *seq, *cp;
390: char c;
391: int sz, uc;
1.20 schwarze 392: size_t ssz;
1.59 schwarze 393: enum mandoc_esc esc;
1.1 kristaps 394:
1.31 schwarze 395: if ( ! (TERMP_NOSPACE & p->flags)) {
1.40 schwarze 396: if ( ! (TERMP_KEEP & p->flags)) {
397: if (TERMP_PREKEEP & p->flags)
398: p->flags |= TERMP_KEEP;
1.31 schwarze 399: bufferc(p, ' ');
1.40 schwarze 400: if (TERMP_SENTENCE & p->flags)
401: bufferc(p, ' ');
402: } else
403: bufferc(p, ASCII_NBRSP);
1.31 schwarze 404: }
1.1 kristaps 405:
406: if ( ! (p->flags & TERMP_NONOSPACE))
407: p->flags &= ~TERMP_NOSPACE;
1.46 schwarze 408: else
409: p->flags |= TERMP_NOSPACE;
1.1 kristaps 410:
1.52 schwarze 411: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
1.31 schwarze 412:
1.59 schwarze 413: while ('\0' != *word) {
1.64 schwarze 414: if ('\\' != *word) {
415: if (TERMP_SKIPCHAR & p->flags) {
416: p->flags &= ~TERMP_SKIPCHAR;
417: word++;
418: continue;
419: }
420: ssz = strcspn(word, "\\");
1.45 schwarze 421: encode(p, word, ssz);
1.64 schwarze 422: word += (int)ssz;
1.20 schwarze 423: continue;
1.64 schwarze 424: }
1.20 schwarze 425:
1.59 schwarze 426: word++;
427: esc = mandoc_escape(&word, &seq, &sz);
428: if (ESCAPE_ERROR == esc)
429: break;
430:
431: if (TERMENC_ASCII != p->enc)
432: switch (esc) {
433: case (ESCAPE_UNICODE):
434: uc = mchars_num2uc(seq + 1, sz - 1);
435: if ('\0' == uc)
436: break;
437: encode1(p, uc);
438: continue;
439: case (ESCAPE_SPECIAL):
440: uc = mchars_spec2cp(p->symtab, seq, sz);
441: if (uc <= 0)
442: break;
443: encode1(p, uc);
444: continue;
445: default:
446: break;
447: }
1.20 schwarze 448:
1.59 schwarze 449: switch (esc) {
450: case (ESCAPE_UNICODE):
451: encode1(p, '?');
1.56 schwarze 452: break;
1.59 schwarze 453: case (ESCAPE_NUMBERED):
454: c = mchars_num2char(seq, sz);
455: if ('\0' != c)
456: encode(p, &c, 1);
1.20 schwarze 457: break;
1.59 schwarze 458: case (ESCAPE_SPECIAL):
459: cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
460: if (NULL != cp)
461: encode(p, cp, ssz);
462: else if (1 == ssz)
463: encode(p, seq, sz);
1.20 schwarze 464: break;
1.59 schwarze 465: case (ESCAPE_FONTBOLD):
1.20 schwarze 466: term_fontrepl(p, TERMFONT_BOLD);
467: break;
1.59 schwarze 468: case (ESCAPE_FONTITALIC):
1.20 schwarze 469: term_fontrepl(p, TERMFONT_UNDER);
470: break;
1.59 schwarze 471: case (ESCAPE_FONT):
472: /* FALLTHROUGH */
473: case (ESCAPE_FONTROMAN):
1.20 schwarze 474: term_fontrepl(p, TERMFONT_NONE);
475: break;
1.59 schwarze 476: case (ESCAPE_FONTPREV):
1.20 schwarze 477: term_fontlast(p);
478: break;
1.59 schwarze 479: case (ESCAPE_NOSPACE):
1.64 schwarze 480: if (TERMP_SKIPCHAR & p->flags)
481: p->flags &= ~TERMP_SKIPCHAR;
482: else if ('\0' == *word)
1.59 schwarze 483: p->flags |= TERMP_NOSPACE;
484: break;
1.64 schwarze 485: case (ESCAPE_SKIPCHAR):
486: p->flags |= TERMP_SKIPCHAR;
487: break;
1.20 schwarze 488: default:
489: break;
490: }
491: }
1.1 kristaps 492: }
493:
494: static void
1.59 schwarze 495: adjbuf(struct termp *p, int sz)
1.1 kristaps 496: {
497:
1.20 schwarze 498: if (0 == p->maxcols)
499: p->maxcols = 1024;
500: while (sz >= p->maxcols)
501: p->maxcols <<= 2;
502:
1.59 schwarze 503: p->buf = mandoc_realloc
504: (p->buf, sizeof(int) * (size_t)p->maxcols);
1.1 kristaps 505: }
506:
1.4 schwarze 507: static void
1.20 schwarze 508: bufferc(struct termp *p, char c)
509: {
510:
511: if (p->col + 1 >= p->maxcols)
512: adjbuf(p, p->col + 1);
513:
1.59 schwarze 514: p->buf[p->col++] = c;
1.20 schwarze 515: }
516:
1.59 schwarze 517: /*
518: * See encode().
519: * Do this for a single (probably unicode) value.
520: * Does not check for non-decorated glyphs.
521: */
522: static void
523: encode1(struct termp *p, int c)
524: {
525: enum termfont f;
526:
1.64 schwarze 527: if (TERMP_SKIPCHAR & p->flags) {
528: p->flags &= ~TERMP_SKIPCHAR;
529: return;
530: }
531:
1.59 schwarze 532: if (p->col + 4 >= p->maxcols)
533: adjbuf(p, p->col + 4);
534:
535: f = term_fonttop(p);
536:
537: if (TERMFONT_NONE == f) {
538: p->buf[p->col++] = c;
539: return;
540: } else if (TERMFONT_UNDER == f) {
541: p->buf[p->col++] = '_';
542: } else
543: p->buf[p->col++] = c;
544:
545: p->buf[p->col++] = 8;
546: p->buf[p->col++] = c;
547: }
1.20 schwarze 548:
549: static void
550: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 551: {
1.20 schwarze 552: enum termfont f;
1.59 schwarze 553: int i, len;
554:
1.64 schwarze 555: if (TERMP_SKIPCHAR & p->flags) {
556: p->flags &= ~TERMP_SKIPCHAR;
557: return;
558: }
559:
1.59 schwarze 560: /* LINTED */
561: len = sz;
1.20 schwarze 562:
563: /*
564: * Encode and buffer a string of characters. If the current
565: * font mode is unset, buffer directly, else encode then buffer
566: * character by character.
567: */
568:
1.38 schwarze 569: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.59 schwarze 570: if (p->col + len >= p->maxcols)
571: adjbuf(p, p->col + len);
572: for (i = 0; i < len; i++)
573: p->buf[p->col++] = word[i];
1.20 schwarze 574: return;
575: }
576:
1.46 schwarze 577: /* Pre-buffer, assuming worst-case. */
578:
1.59 schwarze 579: if (p->col + 1 + (len * 3) >= p->maxcols)
580: adjbuf(p, p->col + 1 + (len * 3));
1.46 schwarze 581:
1.59 schwarze 582: for (i = 0; i < len; i++) {
1.60 schwarze 583: if (ASCII_HYPH != word[i] &&
584: ! isgraph((unsigned char)word[i])) {
1.59 schwarze 585: p->buf[p->col++] = word[i];
1.20 schwarze 586: continue;
1.4 schwarze 587: }
1.20 schwarze 588:
589: if (TERMFONT_UNDER == f)
1.59 schwarze 590: p->buf[p->col++] = '_';
1.60 schwarze 591: else if (ASCII_HYPH == word[i])
592: p->buf[p->col++] = '-';
1.20 schwarze 593: else
1.59 schwarze 594: p->buf[p->col++] = word[i];
1.20 schwarze 595:
1.59 schwarze 596: p->buf[p->col++] = 8;
597: p->buf[p->col++] = word[i];
1.4 schwarze 598: }
599: }
1.16 schwarze 600:
601: size_t
1.39 schwarze 602: term_len(const struct termp *p, size_t sz)
603: {
604:
605: return((*p->width)(p, ' ') * sz);
606: }
607:
1.64 schwarze 608: static size_t
609: cond_width(const struct termp *p, int c, int *skip)
610: {
611:
612: if (*skip) {
613: (*skip) = 0;
614: return(0);
615: } else
616: return((*p->width)(p, c));
617: }
1.39 schwarze 618:
619: size_t
620: term_strlen(const struct termp *p, const char *cp)
621: {
1.59 schwarze 622: size_t sz, rsz, i;
1.64 schwarze 623: int ssz, skip, c;
1.50 schwarze 624: const char *seq, *rhs;
1.59 schwarze 625: enum mandoc_esc esc;
626: static const char rej[] = { '\\', ASCII_HYPH, ASCII_NBRSP, '\0' };
627:
628: /*
629: * Account for escaped sequences within string length
630: * calculations. This follows the logic in term_word() as we
631: * must calculate the width of produced strings.
632: */
633:
634: sz = 0;
1.64 schwarze 635: skip = 0;
1.59 schwarze 636: while ('\0' != *cp) {
637: rsz = strcspn(cp, rej);
638: for (i = 0; i < rsz; i++)
1.64 schwarze 639: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 640:
641: c = 0;
642: switch (*cp) {
643: case ('\\'):
644: cp++;
645: esc = mandoc_escape(&cp, &seq, &ssz);
646: if (ESCAPE_ERROR == esc)
647: return(sz);
648:
649: if (TERMENC_ASCII != p->enc)
650: switch (esc) {
651: case (ESCAPE_UNICODE):
652: c = mchars_num2uc
653: (seq + 1, ssz - 1);
654: if ('\0' == c)
655: break;
1.64 schwarze 656: sz += cond_width(p, c, &skip);
1.59 schwarze 657: continue;
658: case (ESCAPE_SPECIAL):
659: c = mchars_spec2cp
660: (p->symtab, seq, ssz);
661: if (c <= 0)
662: break;
1.64 schwarze 663: sz += cond_width(p, c, &skip);
1.59 schwarze 664: continue;
665: default:
666: break;
667: }
668:
669: rhs = NULL;
1.50 schwarze 670:
1.59 schwarze 671: switch (esc) {
672: case (ESCAPE_UNICODE):
1.64 schwarze 673: sz += cond_width(p, '?', &skip);
1.59 schwarze 674: break;
675: case (ESCAPE_NUMBERED):
676: c = mchars_num2char(seq, ssz);
677: if ('\0' != c)
1.64 schwarze 678: sz += cond_width(p, c, &skip);
1.50 schwarze 679: break;
1.59 schwarze 680: case (ESCAPE_SPECIAL):
681: rhs = mchars_spec2str
1.50 schwarze 682: (p->symtab, seq, ssz, &rsz);
683:
1.59 schwarze 684: if (ssz != 1 || rhs)
1.50 schwarze 685: break;
686:
687: rhs = seq;
688: rsz = ssz;
689: break;
1.64 schwarze 690: case (ESCAPE_SKIPCHAR):
691: skip = 1;
692: break;
1.50 schwarze 693: default:
694: break;
695: }
1.39 schwarze 696:
1.59 schwarze 697: if (NULL == rhs)
698: break;
699:
1.64 schwarze 700: if (skip) {
701: skip = 0;
702: break;
703: }
704:
1.59 schwarze 705: for (i = 0; i < rsz; i++)
706: sz += (*p->width)(p, *rhs++);
707: break;
708: case (ASCII_NBRSP):
1.64 schwarze 709: sz += cond_width(p, ' ', &skip);
1.55 schwarze 710: cp++;
1.59 schwarze 711: break;
712: case (ASCII_HYPH):
1.64 schwarze 713: sz += cond_width(p, '-', &skip);
1.55 schwarze 714: cp++;
1.59 schwarze 715: break;
716: default:
717: break;
718: }
719: }
1.39 schwarze 720:
721: return(sz);
722: }
723:
1.44 schwarze 724: /* ARGSUSED */
1.39 schwarze 725: size_t
726: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 727: {
728: double r;
729:
730: switch (su->unit) {
731: case (SCALE_CM):
732: r = su->scale * 2;
733: break;
734: case (SCALE_IN):
735: r = su->scale * 6;
736: break;
737: case (SCALE_PC):
738: r = su->scale;
739: break;
740: case (SCALE_PT):
741: r = su->scale / 8;
742: break;
743: case (SCALE_MM):
744: r = su->scale / 1000;
745: break;
746: case (SCALE_VS):
747: r = su->scale;
748: break;
749: default:
750: r = su->scale - 1;
751: break;
752: }
753:
754: if (r < 0.0)
755: r = 0.0;
756: return(/* LINTED */(size_t)
757: r);
758: }
759:
760: size_t
1.39 schwarze 761: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 762: {
1.44 schwarze 763: double v;
1.16 schwarze 764:
1.44 schwarze 765: v = ((*p->hspan)(p, su));
766: if (v < 0.0)
767: v = 0.0;
768: return((size_t) /* LINTED */
769: v);
1.16 schwarze 770: }
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