Annotation of src/usr.bin/mandoc/term.c, Revision 1.74
1.74 ! schwarze 1: /* $Id: term.c,v 1.73 2013/12/23 02:19:57 schwarze Exp $ */
1.1 kristaps 2: /*
1.59 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.70 schwarze 4: * Copyright (c) 2010, 2011, 2012, 2013 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 *);
1.71 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: /*
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.
1.72 schwarze 82: * p->trailspace may be set to 0, 1, or 2, depending on how many
83: * space characters are required at the end of the column.
1.9 schwarze 84: *
1.6 schwarze 85: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
86: * the line is overrun, and don't pad-right if it's underrun.
87: *
88: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
1.61 schwarze 89: * overrunning, instead save the position and continue at that point
1.6 schwarze 90: * when the next invocation.
1.1 kristaps 91: *
92: * In-line line breaking:
93: *
94: * If TERMP_NOBREAK is specified and the line overruns the right
95: * margin, it will break and pad-right to the right margin after
96: * writing. If maxrmargin is violated, it will break and continue
1.19 schwarze 97: * writing from the right-margin, which will lead to the above scenario
98: * upon exit. Otherwise, the line will break at the right margin.
1.1 kristaps 99: */
100: void
101: term_flushln(struct termp *p)
102: {
1.71 schwarze 103: size_t i; /* current input position in p->buf */
1.66 schwarze 104: int ntab; /* number of tabs to prepend */
1.19 schwarze 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 */
1.71 schwarze 110: size_t j; /* temporary loop index for p->buf */
111: size_t jhy; /* last hyph before overflow w/r/t j */
1.42 schwarze 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
1.73 schwarze 119: * small set of values.
120: *
121: * The following unsigned-signed subtractions look strange,
122: * but they are actually correct. If the int p->overstep
123: * is negative, it gets sign extended. Subtracting that
124: * very large size_t effectively adds a small number to dv.
1.1 kristaps 125: */
1.54 schwarze 126: assert (p->rmargin >= p->offset);
1.53 schwarze 127: dv = p->rmargin - p->offset;
128: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
129: dv = p->maxrmargin - p->offset;
130: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.9 schwarze 131:
1.1 kristaps 132: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.19 schwarze 133:
1.33 schwarze 134: /*
1.61 schwarze 135: * Calculate the required amount of padding.
1.33 schwarze 136: */
1.61 schwarze 137: vbl = p->offset + p->overstep > p->viscol ?
138: p->offset + p->overstep - p->viscol : 0;
1.33 schwarze 139:
1.53 schwarze 140: vis = vend = 0;
141: i = 0;
1.19 schwarze 142:
1.59 schwarze 143: while (i < p->col) {
1.22 schwarze 144: /*
1.42 schwarze 145: * Handle literal tab characters: collapse all
146: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 147: */
1.66 schwarze 148: ntab = 0;
1.59 schwarze 149: while (i < p->col && '\t' == p->buf[i]) {
1.42 schwarze 150: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.30 schwarze 151: vbl += vend - vis;
152: vis = vend;
1.66 schwarze 153: ntab++;
1.49 schwarze 154: i++;
1.30 schwarze 155: }
1.22 schwarze 156:
1.1 kristaps 157: /*
158: * Count up visible word characters. Control sequences
159: * (starting with the CSI) aren't counted. A space
160: * generates a non-printing word, which is valid (the
161: * space is printed according to regular spacing rules).
162: */
163:
1.59 schwarze 164: for (j = i, jhy = 0; j < p->col; j++) {
1.69 schwarze 165: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.1 kristaps 166: break;
1.42 schwarze 167:
168: /* Back over the the last printed character. */
169: if (8 == p->buf[j]) {
170: assert(j);
171: vend -= (*p->width)(p, p->buf[j - 1]);
172: continue;
173: }
174:
175: /* Regular word. */
176: /* Break at the hyphen point if we overrun. */
177: if (vend > vis && vend < bp &&
178: ASCII_HYPH == p->buf[j])
179: jhy = j;
180:
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;
1.5 schwarze 192: if (TERMP_NOBREAK & p->flags) {
1.62 schwarze 193: vbl = p->rmargin;
1.22 schwarze 194: vend += p->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;
221: while (' ' == 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: }
232:
233: /*
234: * Now we definitely know there will be
235: * printable characters to output,
236: * so write preceding white space now.
237: */
238: if (vbl) {
1.37 schwarze 239: (*p->advance)(p, vbl);
1.33 schwarze 240: p->viscol += vbl;
241: vbl = 0;
242: }
1.35 schwarze 243:
1.42 schwarze 244: if (ASCII_HYPH == p->buf[i]) {
1.37 schwarze 245: (*p->letter)(p, '-');
1.42 schwarze 246: p->viscol += (*p->width)(p, '-');
1.61 schwarze 247: continue;
248: }
249:
250: (*p->letter)(p, p->buf[i]);
251: if (8 == p->buf[i])
252: p->viscol -= (*p->width)(p, p->buf[i-1]);
253: else
1.42 schwarze 254: p->viscol += (*p->width)(p, p->buf[i]);
1.1 kristaps 255: }
1.22 schwarze 256: vis = vend;
1.1 kristaps 257: }
1.48 schwarze 258:
259: /*
260: * If there was trailing white space, it was not printed;
261: * so reset the cursor position accordingly.
262: */
1.61 schwarze 263: if (vis)
264: vis -= vbl;
1.18 schwarze 265:
1.9 schwarze 266: p->col = 0;
1.26 schwarze 267: p->overstep = 0;
1.1 kristaps 268:
1.9 schwarze 269: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 270: p->viscol = 0;
1.37 schwarze 271: (*p->endline)(p);
1.1 kristaps 272: return;
273: }
274:
1.9 schwarze 275: if (TERMP_HANG & p->flags) {
1.72 schwarze 276: p->overstep = (int)(vis - maxvis +
277: p->trailspace * (*p->width)(p, ' '));
1.9 schwarze 278:
279: /*
280: * If we have overstepped the margin, temporarily move
281: * it to the right and flag the rest of the line to be
282: * shorter.
1.73 schwarze 283: * If there is a request to keep the columns together,
284: * allow negative overstep when the column is not full.
1.9 schwarze 285: */
1.73 schwarze 286: if (p->trailspace && p->overstep < 0)
1.26 schwarze 287: p->overstep = 0;
1.61 schwarze 288: return;
1.9 schwarze 289:
290: } else if (TERMP_DANGLE & p->flags)
291: return;
1.1 kristaps 292:
1.61 schwarze 293: /* If the column was overrun, break the line. */
1.72 schwarze 294: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.37 schwarze 295: (*p->endline)(p);
1.61 schwarze 296: p->viscol = 0;
1.9 schwarze 297: }
1.1 kristaps 298: }
299:
300:
301: /*
302: * A newline only breaks an existing line; it won't assert vertical
303: * space. All data in the output buffer is flushed prior to the newline
304: * assertion.
305: */
306: void
307: term_newln(struct termp *p)
308: {
309:
310: p->flags |= TERMP_NOSPACE;
1.61 schwarze 311: if (p->col || p->viscol)
312: term_flushln(p);
1.1 kristaps 313: }
314:
315:
316: /*
317: * Asserts a vertical space (a full, empty line-break between lines).
318: * Note that if used twice, this will cause two blank spaces and so on.
319: * All data in the output buffer is flushed prior to the newline
320: * assertion.
321: */
322: void
323: term_vspace(struct termp *p)
324: {
325:
326: term_newln(p);
1.29 schwarze 327: p->viscol = 0;
1.63 schwarze 328: if (0 < p->skipvsp)
329: p->skipvsp--;
330: else
331: (*p->endline)(p);
1.1 kristaps 332: }
333:
1.20 schwarze 334: void
335: term_fontlast(struct termp *p)
336: {
337: enum termfont f;
1.11 schwarze 338:
1.20 schwarze 339: f = p->fontl;
340: p->fontl = p->fontq[p->fonti];
341: p->fontq[p->fonti] = f;
342: }
343:
344:
345: void
346: term_fontrepl(struct termp *p, enum termfont f)
347: {
348:
349: p->fontl = p->fontq[p->fonti];
350: p->fontq[p->fonti] = f;
1.1 kristaps 351: }
352:
353:
1.20 schwarze 354: void
355: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 356: {
1.7 schwarze 357:
1.20 schwarze 358: assert(p->fonti + 1 < 10);
359: p->fontl = p->fontq[p->fonti];
360: p->fontq[++p->fonti] = f;
361: }
1.1 kristaps 362:
363:
1.20 schwarze 364: const void *
365: term_fontq(struct termp *p)
366: {
1.1 kristaps 367:
1.20 schwarze 368: return(&p->fontq[p->fonti]);
369: }
1.1 kristaps 370:
371:
1.20 schwarze 372: enum termfont
373: term_fonttop(struct termp *p)
374: {
1.1 kristaps 375:
1.20 schwarze 376: return(p->fontq[p->fonti]);
377: }
1.7 schwarze 378:
379:
1.20 schwarze 380: void
381: term_fontpopq(struct termp *p, const void *key)
382: {
1.1 kristaps 383:
1.67 schwarze 384: while (p->fonti >= 0 && key < (void *)(p->fontq + p->fonti))
1.20 schwarze 385: p->fonti--;
386: assert(p->fonti >= 0);
387: }
1.1 kristaps 388:
389:
1.20 schwarze 390: void
391: term_fontpop(struct termp *p)
392: {
1.1 kristaps 393:
1.20 schwarze 394: assert(p->fonti);
395: p->fonti--;
1.1 kristaps 396: }
397:
398: /*
399: * Handle pwords, partial words, which may be either a single word or a
400: * phrase that cannot be broken down (such as a literal string). This
401: * handles word styling.
402: */
1.7 schwarze 403: void
404: term_word(struct termp *p, const char *word)
1.1 kristaps 405: {
1.59 schwarze 406: const char *seq, *cp;
407: char c;
408: int sz, uc;
1.20 schwarze 409: size_t ssz;
1.59 schwarze 410: enum mandoc_esc esc;
1.1 kristaps 411:
1.31 schwarze 412: if ( ! (TERMP_NOSPACE & p->flags)) {
1.40 schwarze 413: if ( ! (TERMP_KEEP & p->flags)) {
1.31 schwarze 414: bufferc(p, ' ');
1.40 schwarze 415: if (TERMP_SENTENCE & p->flags)
416: bufferc(p, ' ');
417: } else
418: bufferc(p, ASCII_NBRSP);
1.31 schwarze 419: }
1.68 schwarze 420: if (TERMP_PREKEEP & p->flags)
421: p->flags |= TERMP_KEEP;
1.1 kristaps 422:
423: if ( ! (p->flags & TERMP_NONOSPACE))
424: p->flags &= ~TERMP_NOSPACE;
1.46 schwarze 425: else
426: p->flags |= TERMP_NOSPACE;
1.1 kristaps 427:
1.74 ! schwarze 428: p->flags &= ~TERMP_SENTENCE;
1.31 schwarze 429:
1.59 schwarze 430: while ('\0' != *word) {
1.64 schwarze 431: if ('\\' != *word) {
432: if (TERMP_SKIPCHAR & p->flags) {
433: p->flags &= ~TERMP_SKIPCHAR;
434: word++;
435: continue;
436: }
437: ssz = strcspn(word, "\\");
1.45 schwarze 438: encode(p, word, ssz);
1.64 schwarze 439: word += (int)ssz;
1.20 schwarze 440: continue;
1.64 schwarze 441: }
1.20 schwarze 442:
1.59 schwarze 443: word++;
444: esc = mandoc_escape(&word, &seq, &sz);
445: if (ESCAPE_ERROR == esc)
446: break;
447:
448: if (TERMENC_ASCII != p->enc)
449: switch (esc) {
450: case (ESCAPE_UNICODE):
451: uc = mchars_num2uc(seq + 1, sz - 1);
452: if ('\0' == uc)
453: break;
454: encode1(p, uc);
455: continue;
456: case (ESCAPE_SPECIAL):
457: uc = mchars_spec2cp(p->symtab, seq, sz);
458: if (uc <= 0)
459: break;
460: encode1(p, uc);
461: continue;
462: default:
463: break;
464: }
1.20 schwarze 465:
1.59 schwarze 466: switch (esc) {
467: case (ESCAPE_UNICODE):
468: encode1(p, '?');
1.56 schwarze 469: break;
1.59 schwarze 470: case (ESCAPE_NUMBERED):
471: c = mchars_num2char(seq, sz);
472: if ('\0' != c)
473: encode(p, &c, 1);
1.20 schwarze 474: break;
1.59 schwarze 475: case (ESCAPE_SPECIAL):
476: cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
477: if (NULL != cp)
478: encode(p, cp, ssz);
479: else if (1 == ssz)
480: encode(p, seq, sz);
1.20 schwarze 481: break;
1.59 schwarze 482: case (ESCAPE_FONTBOLD):
1.20 schwarze 483: term_fontrepl(p, TERMFONT_BOLD);
484: break;
1.59 schwarze 485: case (ESCAPE_FONTITALIC):
1.20 schwarze 486: term_fontrepl(p, TERMFONT_UNDER);
487: break;
1.70 schwarze 488: case (ESCAPE_FONTBI):
489: term_fontrepl(p, TERMFONT_BI);
490: break;
1.59 schwarze 491: case (ESCAPE_FONT):
492: /* FALLTHROUGH */
493: case (ESCAPE_FONTROMAN):
1.20 schwarze 494: term_fontrepl(p, TERMFONT_NONE);
495: break;
1.59 schwarze 496: case (ESCAPE_FONTPREV):
1.20 schwarze 497: term_fontlast(p);
498: break;
1.59 schwarze 499: case (ESCAPE_NOSPACE):
1.64 schwarze 500: if (TERMP_SKIPCHAR & p->flags)
501: p->flags &= ~TERMP_SKIPCHAR;
502: else if ('\0' == *word)
1.59 schwarze 503: p->flags |= TERMP_NOSPACE;
504: break;
1.64 schwarze 505: case (ESCAPE_SKIPCHAR):
506: p->flags |= TERMP_SKIPCHAR;
507: break;
1.20 schwarze 508: default:
509: break;
510: }
511: }
1.1 kristaps 512: }
513:
514: static void
1.71 schwarze 515: adjbuf(struct termp *p, size_t sz)
1.1 kristaps 516: {
517:
1.20 schwarze 518: if (0 == p->maxcols)
519: p->maxcols = 1024;
520: while (sz >= p->maxcols)
521: p->maxcols <<= 2;
522:
1.71 schwarze 523: p->buf = mandoc_realloc(p->buf, sizeof(int) * p->maxcols);
1.1 kristaps 524: }
525:
1.4 schwarze 526: static void
1.20 schwarze 527: bufferc(struct termp *p, char c)
528: {
529:
530: if (p->col + 1 >= p->maxcols)
531: adjbuf(p, p->col + 1);
532:
1.59 schwarze 533: p->buf[p->col++] = c;
1.20 schwarze 534: }
535:
1.59 schwarze 536: /*
537: * See encode().
538: * Do this for a single (probably unicode) value.
539: * Does not check for non-decorated glyphs.
540: */
541: static void
542: encode1(struct termp *p, int c)
543: {
544: enum termfont f;
545:
1.64 schwarze 546: if (TERMP_SKIPCHAR & p->flags) {
547: p->flags &= ~TERMP_SKIPCHAR;
548: return;
549: }
550:
1.70 schwarze 551: if (p->col + 6 >= p->maxcols)
552: adjbuf(p, p->col + 6);
1.59 schwarze 553:
554: f = term_fonttop(p);
555:
1.70 schwarze 556: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.59 schwarze 557: p->buf[p->col++] = '_';
1.70 schwarze 558: p->buf[p->col++] = 8;
559: }
560: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
561: if (ASCII_HYPH == c)
562: p->buf[p->col++] = '-';
563: else
564: p->buf[p->col++] = c;
565: p->buf[p->col++] = 8;
566: }
1.59 schwarze 567: p->buf[p->col++] = c;
568: }
1.20 schwarze 569:
570: static void
571: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 572: {
1.71 schwarze 573: size_t i;
1.59 schwarze 574:
1.64 schwarze 575: if (TERMP_SKIPCHAR & p->flags) {
576: p->flags &= ~TERMP_SKIPCHAR;
577: return;
578: }
579:
1.20 schwarze 580: /*
581: * Encode and buffer a string of characters. If the current
582: * font mode is unset, buffer directly, else encode then buffer
583: * character by character.
584: */
585:
1.70 schwarze 586: if (TERMFONT_NONE == term_fonttop(p)) {
1.71 schwarze 587: if (p->col + sz >= p->maxcols)
588: adjbuf(p, p->col + sz);
589: for (i = 0; i < sz; i++)
1.59 schwarze 590: p->buf[p->col++] = word[i];
1.20 schwarze 591: return;
592: }
593:
1.46 schwarze 594: /* Pre-buffer, assuming worst-case. */
595:
1.71 schwarze 596: if (p->col + 1 + (sz * 5) >= p->maxcols)
597: adjbuf(p, p->col + 1 + (sz * 5));
1.46 schwarze 598:
1.71 schwarze 599: for (i = 0; i < sz; i++) {
1.70 schwarze 600: if (ASCII_HYPH == word[i] ||
601: isgraph((unsigned char)word[i]))
602: encode1(p, word[i]);
1.20 schwarze 603: else
1.59 schwarze 604: p->buf[p->col++] = word[i];
1.4 schwarze 605: }
606: }
1.16 schwarze 607:
608: size_t
1.39 schwarze 609: term_len(const struct termp *p, size_t sz)
610: {
611:
612: return((*p->width)(p, ' ') * sz);
613: }
614:
1.64 schwarze 615: static size_t
616: cond_width(const struct termp *p, int c, int *skip)
617: {
618:
619: if (*skip) {
620: (*skip) = 0;
621: return(0);
622: } else
623: return((*p->width)(p, c));
624: }
1.39 schwarze 625:
626: size_t
627: term_strlen(const struct termp *p, const char *cp)
628: {
1.59 schwarze 629: size_t sz, rsz, i;
1.64 schwarze 630: int ssz, skip, c;
1.50 schwarze 631: const char *seq, *rhs;
1.59 schwarze 632: enum mandoc_esc esc;
633: static const char rej[] = { '\\', ASCII_HYPH, ASCII_NBRSP, '\0' };
634:
635: /*
636: * Account for escaped sequences within string length
637: * calculations. This follows the logic in term_word() as we
638: * must calculate the width of produced strings.
639: */
640:
641: sz = 0;
1.64 schwarze 642: skip = 0;
1.59 schwarze 643: while ('\0' != *cp) {
644: rsz = strcspn(cp, rej);
645: for (i = 0; i < rsz; i++)
1.64 schwarze 646: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 647:
648: c = 0;
649: switch (*cp) {
650: case ('\\'):
651: cp++;
652: esc = mandoc_escape(&cp, &seq, &ssz);
653: if (ESCAPE_ERROR == esc)
654: return(sz);
655:
656: if (TERMENC_ASCII != p->enc)
657: switch (esc) {
658: case (ESCAPE_UNICODE):
659: c = mchars_num2uc
660: (seq + 1, ssz - 1);
661: if ('\0' == c)
662: break;
1.64 schwarze 663: sz += cond_width(p, c, &skip);
1.59 schwarze 664: continue;
665: case (ESCAPE_SPECIAL):
666: c = mchars_spec2cp
667: (p->symtab, seq, ssz);
668: if (c <= 0)
669: break;
1.64 schwarze 670: sz += cond_width(p, c, &skip);
1.59 schwarze 671: continue;
672: default:
673: break;
674: }
675:
676: rhs = NULL;
1.50 schwarze 677:
1.59 schwarze 678: switch (esc) {
679: case (ESCAPE_UNICODE):
1.64 schwarze 680: sz += cond_width(p, '?', &skip);
1.59 schwarze 681: break;
682: case (ESCAPE_NUMBERED):
683: c = mchars_num2char(seq, ssz);
684: if ('\0' != c)
1.64 schwarze 685: sz += cond_width(p, c, &skip);
1.50 schwarze 686: break;
1.59 schwarze 687: case (ESCAPE_SPECIAL):
688: rhs = mchars_spec2str
1.50 schwarze 689: (p->symtab, seq, ssz, &rsz);
690:
1.59 schwarze 691: if (ssz != 1 || rhs)
1.50 schwarze 692: break;
693:
694: rhs = seq;
695: rsz = ssz;
696: break;
1.64 schwarze 697: case (ESCAPE_SKIPCHAR):
698: skip = 1;
699: break;
1.50 schwarze 700: default:
701: break;
702: }
1.39 schwarze 703:
1.59 schwarze 704: if (NULL == rhs)
705: break;
706:
1.64 schwarze 707: if (skip) {
708: skip = 0;
709: break;
710: }
711:
1.59 schwarze 712: for (i = 0; i < rsz; i++)
713: sz += (*p->width)(p, *rhs++);
714: break;
715: case (ASCII_NBRSP):
1.64 schwarze 716: sz += cond_width(p, ' ', &skip);
1.55 schwarze 717: cp++;
1.59 schwarze 718: break;
719: case (ASCII_HYPH):
1.64 schwarze 720: sz += cond_width(p, '-', &skip);
1.55 schwarze 721: cp++;
1.59 schwarze 722: break;
723: default:
724: break;
725: }
726: }
1.39 schwarze 727:
728: return(sz);
729: }
730:
1.44 schwarze 731: /* ARGSUSED */
1.39 schwarze 732: size_t
733: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 734: {
735: double r;
736:
737: switch (su->unit) {
738: case (SCALE_CM):
739: r = su->scale * 2;
740: break;
741: case (SCALE_IN):
742: r = su->scale * 6;
743: break;
744: case (SCALE_PC):
745: r = su->scale;
746: break;
747: case (SCALE_PT):
748: r = su->scale / 8;
749: break;
750: case (SCALE_MM):
751: r = su->scale / 1000;
752: break;
753: case (SCALE_VS):
754: r = su->scale;
755: break;
756: default:
757: r = su->scale - 1;
758: break;
759: }
760:
761: if (r < 0.0)
762: r = 0.0;
763: return(/* LINTED */(size_t)
764: r);
765: }
766:
767: size_t
1.39 schwarze 768: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 769: {
1.44 schwarze 770: double v;
1.16 schwarze 771:
1.44 schwarze 772: v = ((*p->hspan)(p, su));
773: if (v < 0.0)
774: v = 0.0;
775: return((size_t) /* LINTED */
776: v);
1.16 schwarze 777: }
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