Annotation of src/usr.bin/mandoc/term.c, Revision 1.82
1.82 ! schwarze 1: /* $Id: term.c,v 1.81 2014/04/05 21:17:48 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:
1.37 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: /*
1.82 ! schwarze 71: * Flush a chunk of text. By default, break the output line each time
! 72: * the right margin is reached, and continue output on the next line
! 73: * at the same offset as the chunk itself. By default, also break the
! 74: * output line at the end of the chunk.
1.27 schwarze 75: * The following flags may be specified:
1.1 kristaps 76: *
1.82 ! schwarze 77: * - TERMP_NOBREAK: Do not break the output line at the right margin,
! 78: * but only at the max right margin. Also, do not break the output
! 79: * line at the end of the chunk, such that the next call can pad to
! 80: * the next column. However, if less than p->trailspace blanks,
! 81: * which can be 0, 1, or 2, remain to the right margin, the line
! 82: * will be broken.
! 83: * - TERMP_BRIND: If the chunk does not fit and the output line has
! 84: * to be broken, start the next line at the right margin instead
! 85: * of at the offset. Used together with TERMP_NOBREAK for the tags
! 86: * in various kinds of tagged lists.
! 87: * - TERMP_DANGLE: Do not break the output line at the right margin,
! 88: * append the next chunk after it even if this one is too long.
! 89: * To be used together with TERMP_NOBREAK.
! 90: * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
! 91: * the next chunk if this column is not full.
1.1 kristaps 92: */
93: void
94: term_flushln(struct termp *p)
95: {
1.71 schwarze 96: size_t i; /* current input position in p->buf */
1.66 schwarze 97: int ntab; /* number of tabs to prepend */
1.19 schwarze 98: size_t vis; /* current visual position on output */
99: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 100: size_t vend; /* end of word visual position on output */
1.19 schwarze 101: size_t bp; /* visual right border position */
1.51 schwarze 102: size_t dv; /* temporary for visual pos calculations */
1.71 schwarze 103: size_t j; /* temporary loop index for p->buf */
104: size_t jhy; /* last hyph before overflow w/r/t j */
1.42 schwarze 105: size_t maxvis; /* output position of visible boundary */
106: size_t mmax; /* used in calculating bp */
1.1 kristaps 107:
108: /*
109: * First, establish the maximum columns of "visible" content.
110: * This is usually the difference between the right-margin and
111: * an indentation, but can be, for tagged lists or columns, a
1.73 schwarze 112: * small set of values.
113: *
114: * The following unsigned-signed subtractions look strange,
115: * but they are actually correct. If the int p->overstep
116: * is negative, it gets sign extended. Subtracting that
117: * very large size_t effectively adds a small number to dv.
1.1 kristaps 118: */
1.54 schwarze 119: assert (p->rmargin >= p->offset);
1.53 schwarze 120: dv = p->rmargin - p->offset;
121: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
122: dv = p->maxrmargin - p->offset;
123: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.9 schwarze 124:
1.1 kristaps 125: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.19 schwarze 126:
1.33 schwarze 127: /*
1.61 schwarze 128: * Calculate the required amount of padding.
1.33 schwarze 129: */
1.61 schwarze 130: vbl = p->offset + p->overstep > p->viscol ?
131: p->offset + p->overstep - p->viscol : 0;
1.33 schwarze 132:
1.53 schwarze 133: vis = vend = 0;
134: i = 0;
1.19 schwarze 135:
1.59 schwarze 136: while (i < p->col) {
1.22 schwarze 137: /*
1.42 schwarze 138: * Handle literal tab characters: collapse all
139: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 140: */
1.66 schwarze 141: ntab = 0;
1.59 schwarze 142: while (i < p->col && '\t' == p->buf[i]) {
1.42 schwarze 143: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.30 schwarze 144: vbl += vend - vis;
145: vis = vend;
1.66 schwarze 146: ntab++;
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++) {
1.69 schwarze 158: if (' ' == 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 &&
1.77 schwarze 171: (ASCII_HYPH == p->buf[j] ||
172: ASCII_BREAK == p->buf[j]))
1.42 schwarze 173: jhy = j;
174:
1.78 schwarze 175: /*
176: * Hyphenation now decided, put back a real
177: * hyphen such that we get the correct width.
178: */
179: if (ASCII_HYPH == p->buf[j])
180: p->buf[j] = '-';
181:
1.42 schwarze 182: vend += (*p->width)(p, p->buf[j]);
1.1 kristaps 183: }
184:
185: /*
1.5 schwarze 186: * Find out whether we would exceed the right margin.
1.33 schwarze 187: * If so, break to the next line.
1.5 schwarze 188: */
1.33 schwarze 189: if (vend > bp && 0 == jhy && vis > 0) {
1.22 schwarze 190: vend -= vis;
1.37 schwarze 191: (*p->endline)(p);
1.62 schwarze 192: p->viscol = 0;
1.82 ! schwarze 193: if (TERMP_BRIND & p->flags) {
1.62 schwarze 194: vbl = p->rmargin;
1.22 schwarze 195: vend += p->rmargin - p->offset;
1.62 schwarze 196: } else
1.33 schwarze 197: vbl = p->offset;
1.66 schwarze 198:
199: /* use pending tabs on the new line */
200:
201: if (0 < ntab)
202: vbl += ntab * p->tabwidth;
1.33 schwarze 203:
1.73 schwarze 204: /*
205: * Remove the p->overstep width.
206: * Again, if p->overstep is negative,
207: * sign extension does the right thing.
208: */
1.33 schwarze 209:
1.53 schwarze 210: bp += (size_t)p->overstep;
1.26 schwarze 211: p->overstep = 0;
1.1 kristaps 212: }
1.30 schwarze 213:
1.33 schwarze 214: /* Write out the [remaining] word. */
1.59 schwarze 215: for ( ; i < p->col; i++) {
1.25 schwarze 216: if (vend > bp && jhy > 0 && i > jhy)
1.30 schwarze 217: break;
218: if ('\t' == p->buf[i])
1.1 kristaps 219: break;
1.22 schwarze 220: if (' ' == p->buf[i]) {
1.46 schwarze 221: j = i;
222: while (' ' == p->buf[i])
1.33 schwarze 223: i++;
1.71 schwarze 224: dv = (i - j) * (*p->width)(p, ' ');
1.51 schwarze 225: vbl += dv;
226: vend += dv;
1.22 schwarze 227: break;
228: }
1.33 schwarze 229: if (ASCII_NBRSP == p->buf[i]) {
1.42 schwarze 230: vbl += (*p->width)(p, ' ');
1.33 schwarze 231: continue;
232: }
1.77 schwarze 233: if (ASCII_BREAK == p->buf[i])
234: continue;
1.33 schwarze 235:
236: /*
237: * Now we definitely know there will be
238: * printable characters to output,
239: * so write preceding white space now.
240: */
241: if (vbl) {
1.37 schwarze 242: (*p->advance)(p, vbl);
1.33 schwarze 243: p->viscol += vbl;
244: vbl = 0;
1.61 schwarze 245: }
246:
247: (*p->letter)(p, p->buf[i]);
248: if (8 == p->buf[i])
249: p->viscol -= (*p->width)(p, p->buf[i-1]);
250: else
1.42 schwarze 251: p->viscol += (*p->width)(p, p->buf[i]);
1.1 kristaps 252: }
1.22 schwarze 253: vis = vend;
1.1 kristaps 254: }
1.48 schwarze 255:
256: /*
257: * If there was trailing white space, it was not printed;
258: * so reset the cursor position accordingly.
259: */
1.61 schwarze 260: if (vis)
261: vis -= vbl;
1.18 schwarze 262:
1.9 schwarze 263: p->col = 0;
1.26 schwarze 264: p->overstep = 0;
1.1 kristaps 265:
1.9 schwarze 266: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 267: p->viscol = 0;
1.37 schwarze 268: (*p->endline)(p);
1.1 kristaps 269: return;
270: }
271:
1.9 schwarze 272: if (TERMP_HANG & p->flags) {
1.72 schwarze 273: p->overstep = (int)(vis - maxvis +
274: p->trailspace * (*p->width)(p, ' '));
1.9 schwarze 275:
276: /*
277: * If we have overstepped the margin, temporarily move
278: * it to the right and flag the rest of the line to be
279: * shorter.
1.73 schwarze 280: * If there is a request to keep the columns together,
281: * allow negative overstep when the column is not full.
1.9 schwarze 282: */
1.73 schwarze 283: if (p->trailspace && p->overstep < 0)
1.26 schwarze 284: p->overstep = 0;
1.61 schwarze 285: return;
1.9 schwarze 286:
287: } else if (TERMP_DANGLE & p->flags)
288: return;
1.1 kristaps 289:
1.61 schwarze 290: /* If the column was overrun, break the line. */
1.72 schwarze 291: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.37 schwarze 292: (*p->endline)(p);
1.61 schwarze 293: p->viscol = 0;
1.9 schwarze 294: }
1.1 kristaps 295: }
296:
297:
298: /*
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: /*
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:
1.20 schwarze 331: void
332: term_fontlast(struct termp *p)
333: {
334: enum termfont f;
1.11 schwarze 335:
1.20 schwarze 336: f = p->fontl;
337: p->fontl = p->fontq[p->fonti];
338: p->fontq[p->fonti] = f;
339: }
340:
341:
342: void
343: term_fontrepl(struct termp *p, enum termfont f)
344: {
345:
346: p->fontl = p->fontq[p->fonti];
347: p->fontq[p->fonti] = f;
1.1 kristaps 348: }
349:
350:
1.20 schwarze 351: void
352: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 353: {
1.7 schwarze 354:
1.20 schwarze 355: assert(p->fonti + 1 < 10);
356: p->fontl = p->fontq[p->fonti];
357: p->fontq[++p->fonti] = f;
358: }
1.1 kristaps 359:
360:
1.20 schwarze 361: const void *
362: term_fontq(struct termp *p)
363: {
1.1 kristaps 364:
1.20 schwarze 365: return(&p->fontq[p->fonti]);
366: }
1.1 kristaps 367:
368:
1.20 schwarze 369: enum termfont
370: term_fonttop(struct termp *p)
371: {
1.1 kristaps 372:
1.20 schwarze 373: return(p->fontq[p->fonti]);
374: }
1.7 schwarze 375:
376:
1.20 schwarze 377: void
378: term_fontpopq(struct termp *p, const void *key)
379: {
1.1 kristaps 380:
1.67 schwarze 381: while (p->fonti >= 0 && key < (void *)(p->fontq + p->fonti))
1.20 schwarze 382: p->fonti--;
383: assert(p->fonti >= 0);
384: }
1.1 kristaps 385:
386:
1.20 schwarze 387: void
388: term_fontpop(struct termp *p)
389: {
1.1 kristaps 390:
1.20 schwarze 391: assert(p->fonti);
392: p->fonti--;
1.1 kristaps 393: }
394:
395: /*
396: * Handle pwords, partial words, which may be either a single word or a
397: * phrase that cannot be broken down (such as a literal string). This
398: * handles word styling.
399: */
1.7 schwarze 400: void
401: term_word(struct termp *p, const char *word)
1.1 kristaps 402: {
1.75 schwarze 403: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.59 schwarze 404: const char *seq, *cp;
405: char c;
406: int sz, uc;
1.20 schwarze 407: size_t ssz;
1.59 schwarze 408: enum mandoc_esc esc;
1.1 kristaps 409:
1.31 schwarze 410: if ( ! (TERMP_NOSPACE & p->flags)) {
1.40 schwarze 411: if ( ! (TERMP_KEEP & p->flags)) {
1.31 schwarze 412: bufferc(p, ' ');
1.40 schwarze 413: if (TERMP_SENTENCE & p->flags)
414: bufferc(p, ' ');
415: } else
416: bufferc(p, ASCII_NBRSP);
1.31 schwarze 417: }
1.68 schwarze 418: if (TERMP_PREKEEP & p->flags)
419: p->flags |= TERMP_KEEP;
1.1 kristaps 420:
421: if ( ! (p->flags & TERMP_NONOSPACE))
422: p->flags &= ~TERMP_NOSPACE;
1.46 schwarze 423: else
424: p->flags |= TERMP_NOSPACE;
1.1 kristaps 425:
1.74 schwarze 426: p->flags &= ~TERMP_SENTENCE;
1.31 schwarze 427:
1.59 schwarze 428: while ('\0' != *word) {
1.64 schwarze 429: if ('\\' != *word) {
430: if (TERMP_SKIPCHAR & p->flags) {
431: p->flags &= ~TERMP_SKIPCHAR;
432: word++;
433: continue;
434: }
1.75 schwarze 435: if (TERMP_NBRWORD & p->flags) {
436: if (' ' == *word) {
437: encode(p, nbrsp, 1);
438: word++;
439: continue;
440: }
441: ssz = strcspn(word, "\\ ");
442: } else
443: ssz = strcspn(word, "\\");
1.45 schwarze 444: encode(p, word, ssz);
1.64 schwarze 445: word += (int)ssz;
1.20 schwarze 446: continue;
1.64 schwarze 447: }
1.20 schwarze 448:
1.59 schwarze 449: word++;
450: esc = mandoc_escape(&word, &seq, &sz);
451: if (ESCAPE_ERROR == esc)
452: break;
453:
454: if (TERMENC_ASCII != p->enc)
455: switch (esc) {
456: case (ESCAPE_UNICODE):
457: uc = mchars_num2uc(seq + 1, sz - 1);
458: if ('\0' == uc)
459: break;
460: encode1(p, uc);
461: continue;
462: case (ESCAPE_SPECIAL):
463: uc = mchars_spec2cp(p->symtab, seq, sz);
464: if (uc <= 0)
465: break;
466: encode1(p, uc);
467: continue;
468: default:
469: break;
470: }
1.20 schwarze 471:
1.59 schwarze 472: switch (esc) {
473: case (ESCAPE_UNICODE):
474: encode1(p, '?');
1.56 schwarze 475: break;
1.59 schwarze 476: case (ESCAPE_NUMBERED):
477: c = mchars_num2char(seq, sz);
478: if ('\0' != c)
479: encode(p, &c, 1);
1.20 schwarze 480: break;
1.59 schwarze 481: case (ESCAPE_SPECIAL):
482: cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
483: if (NULL != cp)
484: encode(p, cp, ssz);
485: else if (1 == ssz)
486: encode(p, seq, sz);
1.20 schwarze 487: break;
1.59 schwarze 488: case (ESCAPE_FONTBOLD):
1.20 schwarze 489: term_fontrepl(p, TERMFONT_BOLD);
490: break;
1.59 schwarze 491: case (ESCAPE_FONTITALIC):
1.20 schwarze 492: term_fontrepl(p, TERMFONT_UNDER);
493: break;
1.70 schwarze 494: case (ESCAPE_FONTBI):
495: term_fontrepl(p, TERMFONT_BI);
496: break;
1.59 schwarze 497: case (ESCAPE_FONT):
498: /* FALLTHROUGH */
499: case (ESCAPE_FONTROMAN):
1.20 schwarze 500: term_fontrepl(p, TERMFONT_NONE);
501: break;
1.59 schwarze 502: case (ESCAPE_FONTPREV):
1.20 schwarze 503: term_fontlast(p);
504: break;
1.59 schwarze 505: case (ESCAPE_NOSPACE):
1.64 schwarze 506: if (TERMP_SKIPCHAR & p->flags)
507: p->flags &= ~TERMP_SKIPCHAR;
508: else if ('\0' == *word)
1.59 schwarze 509: p->flags |= TERMP_NOSPACE;
510: break;
1.64 schwarze 511: case (ESCAPE_SKIPCHAR):
512: p->flags |= TERMP_SKIPCHAR;
513: break;
1.20 schwarze 514: default:
515: break;
516: }
517: }
1.75 schwarze 518: p->flags &= ~TERMP_NBRWORD;
1.1 kristaps 519: }
520:
521: static void
1.71 schwarze 522: adjbuf(struct termp *p, size_t sz)
1.1 kristaps 523: {
524:
1.20 schwarze 525: if (0 == p->maxcols)
526: p->maxcols = 1024;
527: while (sz >= p->maxcols)
528: p->maxcols <<= 2;
529:
1.71 schwarze 530: p->buf = mandoc_realloc(p->buf, sizeof(int) * p->maxcols);
1.1 kristaps 531: }
532:
1.4 schwarze 533: static void
1.20 schwarze 534: bufferc(struct termp *p, char c)
535: {
536:
537: if (p->col + 1 >= p->maxcols)
538: adjbuf(p, p->col + 1);
539:
1.59 schwarze 540: p->buf[p->col++] = c;
1.20 schwarze 541: }
542:
1.59 schwarze 543: /*
544: * See encode().
545: * Do this for a single (probably unicode) value.
546: * Does not check for non-decorated glyphs.
547: */
548: static void
549: encode1(struct termp *p, int c)
550: {
551: enum termfont f;
552:
1.64 schwarze 553: if (TERMP_SKIPCHAR & p->flags) {
554: p->flags &= ~TERMP_SKIPCHAR;
555: return;
556: }
557:
1.70 schwarze 558: if (p->col + 6 >= p->maxcols)
559: adjbuf(p, p->col + 6);
1.59 schwarze 560:
561: f = term_fonttop(p);
562:
1.70 schwarze 563: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.59 schwarze 564: p->buf[p->col++] = '_';
1.70 schwarze 565: p->buf[p->col++] = 8;
566: }
567: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
568: if (ASCII_HYPH == c)
569: p->buf[p->col++] = '-';
570: else
571: p->buf[p->col++] = c;
572: p->buf[p->col++] = 8;
573: }
1.59 schwarze 574: p->buf[p->col++] = c;
575: }
1.20 schwarze 576:
577: static void
578: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 579: {
1.71 schwarze 580: size_t i;
1.59 schwarze 581:
1.64 schwarze 582: if (TERMP_SKIPCHAR & p->flags) {
583: p->flags &= ~TERMP_SKIPCHAR;
584: return;
585: }
586:
1.20 schwarze 587: /*
588: * Encode and buffer a string of characters. If the current
589: * font mode is unset, buffer directly, else encode then buffer
590: * character by character.
591: */
592:
1.70 schwarze 593: if (TERMFONT_NONE == term_fonttop(p)) {
1.71 schwarze 594: if (p->col + sz >= p->maxcols)
595: adjbuf(p, p->col + sz);
596: for (i = 0; i < sz; i++)
1.59 schwarze 597: p->buf[p->col++] = word[i];
1.20 schwarze 598: return;
599: }
600:
1.46 schwarze 601: /* Pre-buffer, assuming worst-case. */
602:
1.71 schwarze 603: if (p->col + 1 + (sz * 5) >= p->maxcols)
604: adjbuf(p, p->col + 1 + (sz * 5));
1.46 schwarze 605:
1.71 schwarze 606: for (i = 0; i < sz; i++) {
1.70 schwarze 607: if (ASCII_HYPH == word[i] ||
608: isgraph((unsigned char)word[i]))
609: encode1(p, word[i]);
1.20 schwarze 610: else
1.59 schwarze 611: p->buf[p->col++] = word[i];
1.4 schwarze 612: }
1.80 schwarze 613: }
614:
615: void
616: term_setwidth(struct termp *p, const char *wstr)
617: {
618: struct roffsu su;
619: size_t width;
620: int iop;
621:
1.81 schwarze 622: iop = 0;
623: width = 0;
1.80 schwarze 624: if (NULL != wstr) {
625: switch (*wstr) {
626: case ('+'):
627: iop = 1;
628: wstr++;
629: break;
630: case ('-'):
631: iop = -1;
632: wstr++;
633: break;
634: default:
635: break;
636: }
1.81 schwarze 637: if (a2roffsu(wstr, &su, SCALE_MAX))
638: width = term_hspan(p, &su);
639: else
1.80 schwarze 640: iop = 0;
641: }
642: (*p->setwidth)(p, iop, width);
1.4 schwarze 643: }
1.16 schwarze 644:
645: size_t
1.39 schwarze 646: term_len(const struct termp *p, size_t sz)
647: {
648:
649: return((*p->width)(p, ' ') * sz);
650: }
651:
1.64 schwarze 652: static size_t
653: cond_width(const struct termp *p, int c, int *skip)
654: {
655:
656: if (*skip) {
657: (*skip) = 0;
658: return(0);
659: } else
660: return((*p->width)(p, c));
661: }
1.39 schwarze 662:
663: size_t
664: term_strlen(const struct termp *p, const char *cp)
665: {
1.59 schwarze 666: size_t sz, rsz, i;
1.64 schwarze 667: int ssz, skip, c;
1.50 schwarze 668: const char *seq, *rhs;
1.59 schwarze 669: enum mandoc_esc esc;
1.77 schwarze 670: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
671: ASCII_BREAK, '\0' };
1.59 schwarze 672:
673: /*
674: * Account for escaped sequences within string length
675: * calculations. This follows the logic in term_word() as we
676: * must calculate the width of produced strings.
677: */
678:
679: sz = 0;
1.64 schwarze 680: skip = 0;
1.59 schwarze 681: while ('\0' != *cp) {
682: rsz = strcspn(cp, rej);
683: for (i = 0; i < rsz; i++)
1.64 schwarze 684: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 685:
686: switch (*cp) {
687: case ('\\'):
688: cp++;
689: esc = mandoc_escape(&cp, &seq, &ssz);
690: if (ESCAPE_ERROR == esc)
691: return(sz);
692:
693: if (TERMENC_ASCII != p->enc)
694: switch (esc) {
695: case (ESCAPE_UNICODE):
696: c = mchars_num2uc
697: (seq + 1, ssz - 1);
698: if ('\0' == c)
699: break;
1.64 schwarze 700: sz += cond_width(p, c, &skip);
1.59 schwarze 701: continue;
702: case (ESCAPE_SPECIAL):
703: c = mchars_spec2cp
704: (p->symtab, seq, ssz);
705: if (c <= 0)
706: break;
1.64 schwarze 707: sz += cond_width(p, c, &skip);
1.59 schwarze 708: continue;
709: default:
710: break;
711: }
712:
713: rhs = NULL;
1.50 schwarze 714:
1.59 schwarze 715: switch (esc) {
716: case (ESCAPE_UNICODE):
1.64 schwarze 717: sz += cond_width(p, '?', &skip);
1.59 schwarze 718: break;
719: case (ESCAPE_NUMBERED):
720: c = mchars_num2char(seq, ssz);
721: if ('\0' != c)
1.64 schwarze 722: sz += cond_width(p, c, &skip);
1.50 schwarze 723: break;
1.59 schwarze 724: case (ESCAPE_SPECIAL):
725: rhs = mchars_spec2str
1.50 schwarze 726: (p->symtab, seq, ssz, &rsz);
727:
1.59 schwarze 728: if (ssz != 1 || rhs)
1.50 schwarze 729: break;
730:
731: rhs = seq;
732: rsz = ssz;
733: break;
1.64 schwarze 734: case (ESCAPE_SKIPCHAR):
735: skip = 1;
736: break;
1.50 schwarze 737: default:
738: break;
739: }
1.39 schwarze 740:
1.59 schwarze 741: if (NULL == rhs)
742: break;
743:
1.64 schwarze 744: if (skip) {
745: skip = 0;
746: break;
747: }
748:
1.59 schwarze 749: for (i = 0; i < rsz; i++)
750: sz += (*p->width)(p, *rhs++);
751: break;
752: case (ASCII_NBRSP):
1.64 schwarze 753: sz += cond_width(p, ' ', &skip);
1.55 schwarze 754: cp++;
1.59 schwarze 755: break;
756: case (ASCII_HYPH):
1.64 schwarze 757: sz += cond_width(p, '-', &skip);
1.55 schwarze 758: cp++;
1.77 schwarze 759: /* FALLTHROUGH */
760: case (ASCII_BREAK):
1.59 schwarze 761: break;
762: default:
763: break;
764: }
765: }
1.39 schwarze 766:
767: return(sz);
768: }
769:
1.44 schwarze 770: /* ARGSUSED */
1.39 schwarze 771: size_t
772: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 773: {
774: double r;
775:
776: switch (su->unit) {
777: case (SCALE_CM):
778: r = su->scale * 2;
779: break;
780: case (SCALE_IN):
781: r = su->scale * 6;
782: break;
783: case (SCALE_PC):
784: r = su->scale;
785: break;
786: case (SCALE_PT):
787: r = su->scale / 8;
788: break;
789: case (SCALE_MM):
790: r = su->scale / 1000;
791: break;
792: case (SCALE_VS):
793: r = su->scale;
794: break;
795: default:
796: r = su->scale - 1;
797: break;
798: }
799:
800: if (r < 0.0)
801: r = 0.0;
802: return(/* LINTED */(size_t)
803: r);
804: }
805:
806: size_t
1.39 schwarze 807: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 808: {
1.44 schwarze 809: double v;
1.16 schwarze 810:
1.44 schwarze 811: v = ((*p->hspan)(p, su));
812: if (v < 0.0)
813: v = 0.0;
814: return((size_t) /* LINTED */
815: v);
1.16 schwarze 816: }
![[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