Annotation of src/usr.bin/mandoc/term.c, Revision 1.105
1.105 ! schwarze 1: /* $OpenBSD: term.c,v 1.104 2015/01/31 00:11:52 schwarze Exp $ */
1.1 kristaps 2: /*
1.59 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.103 schwarze 4: * Copyright (c) 2010-2015 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.2 schwarze 7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 9: *
1.2 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 kristaps 17: */
1.20 schwarze 18: #include <sys/types.h>
19:
1.1 kristaps 20: #include <assert.h>
1.20 schwarze 21: #include <ctype.h>
1.1 kristaps 22: #include <stdio.h>
23: #include <stdlib.h>
24: #include <string.h>
25:
1.34 schwarze 26: #include "mandoc.h"
1.79 schwarze 27: #include "mandoc_aux.h"
1.16 schwarze 28: #include "out.h"
1.1 kristaps 29: #include "term.h"
1.16 schwarze 30: #include "main.h"
1.1 kristaps 31:
1.64 schwarze 32: static size_t cond_width(const struct termp *, int, int *);
1.71 schwarze 33: static void adjbuf(struct termp *p, size_t);
1.59 schwarze 34: static void bufferc(struct termp *, char);
35: static void encode(struct termp *, const char *, size_t);
36: static void encode1(struct termp *, int);
1.1 kristaps 37:
1.83 schwarze 38:
1.37 schwarze 39: void
40: term_free(struct termp *p)
1.1 kristaps 41: {
42:
1.91 schwarze 43: free(p->buf);
1.98 schwarze 44: free(p->fontq);
1.37 schwarze 45: free(p);
1.1 kristaps 46: }
47:
1.13 schwarze 48: void
1.83 schwarze 49: term_begin(struct termp *p, term_margin head,
1.37 schwarze 50: term_margin foot, const void *arg)
1.1 kristaps 51: {
52:
1.37 schwarze 53: p->headf = head;
54: p->footf = foot;
55: p->argf = arg;
56: (*p->begin)(p);
1.1 kristaps 57: }
58:
1.37 schwarze 59: void
60: term_end(struct termp *p)
1.1 kristaps 61: {
62:
1.37 schwarze 63: (*p->end)(p);
1.1 kristaps 64: }
65:
66: /*
1.82 schwarze 67: * Flush a chunk of text. By default, break the output line each time
68: * the right margin is reached, and continue output on the next line
69: * at the same offset as the chunk itself. By default, also break the
70: * output line at the end of the chunk.
1.27 schwarze 71: * The following flags may be specified:
1.1 kristaps 72: *
1.82 schwarze 73: * - TERMP_NOBREAK: Do not break the output line at the right margin,
74: * but only at the max right margin. Also, do not break the output
75: * line at the end of the chunk, such that the next call can pad to
76: * the next column. However, if less than p->trailspace blanks,
77: * which can be 0, 1, or 2, remain to the right margin, the line
78: * will be broken.
79: * - TERMP_BRIND: If the chunk does not fit and the output line has
80: * to be broken, start the next line at the right margin instead
81: * of at the offset. Used together with TERMP_NOBREAK for the tags
82: * in various kinds of tagged lists.
83: * - TERMP_DANGLE: Do not break the output line at the right margin,
84: * append the next chunk after it even if this one is too long.
85: * To be used together with TERMP_NOBREAK.
86: * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
87: * the next chunk if this column is not full.
1.1 kristaps 88: */
89: void
90: term_flushln(struct termp *p)
91: {
1.71 schwarze 92: size_t i; /* current input position in p->buf */
1.66 schwarze 93: int ntab; /* number of tabs to prepend */
1.19 schwarze 94: size_t vis; /* current visual position on output */
95: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 96: size_t vend; /* end of word visual position on output */
1.19 schwarze 97: size_t bp; /* visual right border position */
1.51 schwarze 98: size_t dv; /* temporary for visual pos calculations */
1.71 schwarze 99: size_t j; /* temporary loop index for p->buf */
100: size_t jhy; /* last hyph before overflow w/r/t j */
1.42 schwarze 101: size_t maxvis; /* output position of visible boundary */
1.1 kristaps 102:
103: /*
104: * First, establish the maximum columns of "visible" content.
105: * This is usually the difference between the right-margin and
106: * an indentation, but can be, for tagged lists or columns, a
1.73 schwarze 107: * small set of values.
108: *
109: * The following unsigned-signed subtractions look strange,
110: * but they are actually correct. If the int p->overstep
111: * is negative, it gets sign extended. Subtracting that
112: * very large size_t effectively adds a small number to dv.
1.1 kristaps 113: */
1.100 schwarze 114: dv = p->rmargin > p->offset ? p->rmargin - p->offset : 0;
1.53 schwarze 115: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.9 schwarze 116:
1.96 schwarze 117: if (p->flags & TERMP_NOBREAK) {
118: dv = p->maxrmargin > p->offset ?
119: p->maxrmargin - p->offset : 0;
120: bp = (int)dv > p->overstep ?
121: dv - (size_t)p->overstep : 0;
122: } else
123: bp = maxvis;
1.19 schwarze 124:
1.33 schwarze 125: /*
1.61 schwarze 126: * Calculate the required amount of padding.
1.33 schwarze 127: */
1.61 schwarze 128: vbl = p->offset + p->overstep > p->viscol ?
129: p->offset + p->overstep - p->viscol : 0;
1.33 schwarze 130:
1.53 schwarze 131: vis = vend = 0;
132: i = 0;
1.19 schwarze 133:
1.59 schwarze 134: while (i < p->col) {
1.22 schwarze 135: /*
1.42 schwarze 136: * Handle literal tab characters: collapse all
137: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 138: */
1.66 schwarze 139: ntab = 0;
1.59 schwarze 140: while (i < p->col && '\t' == p->buf[i]) {
1.42 schwarze 141: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.30 schwarze 142: vbl += vend - vis;
143: vis = vend;
1.66 schwarze 144: ntab++;
1.49 schwarze 145: i++;
1.30 schwarze 146: }
1.22 schwarze 147:
1.1 kristaps 148: /*
149: * Count up visible word characters. Control sequences
150: * (starting with the CSI) aren't counted. A space
151: * generates a non-printing word, which is valid (the
152: * space is printed according to regular spacing rules).
153: */
154:
1.59 schwarze 155: for (j = i, jhy = 0; j < p->col; j++) {
1.69 schwarze 156: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.1 kristaps 157: break;
1.42 schwarze 158:
159: /* Back over the the last printed character. */
160: if (8 == p->buf[j]) {
161: assert(j);
162: vend -= (*p->width)(p, p->buf[j - 1]);
163: continue;
164: }
165:
166: /* Regular word. */
167: /* Break at the hyphen point if we overrun. */
1.83 schwarze 168: if (vend > vis && vend < bp &&
1.77 schwarze 169: (ASCII_HYPH == p->buf[j] ||
170: ASCII_BREAK == p->buf[j]))
1.42 schwarze 171: jhy = j;
172:
1.78 schwarze 173: /*
174: * Hyphenation now decided, put back a real
175: * hyphen such that we get the correct width.
176: */
177: if (ASCII_HYPH == p->buf[j])
178: p->buf[j] = '-';
179:
1.42 schwarze 180: vend += (*p->width)(p, p->buf[j]);
1.1 kristaps 181: }
182:
183: /*
1.5 schwarze 184: * Find out whether we would exceed the right margin.
1.33 schwarze 185: * If so, break to the next line.
1.5 schwarze 186: */
1.33 schwarze 187: if (vend > bp && 0 == jhy && vis > 0) {
1.22 schwarze 188: vend -= vis;
1.37 schwarze 189: (*p->endline)(p);
1.62 schwarze 190: p->viscol = 0;
1.82 schwarze 191: if (TERMP_BRIND & p->flags) {
1.100 schwarze 192: vbl = p->rmargin;
193: vend += p->rmargin;
194: vend -= p->offset;
1.62 schwarze 195: } else
1.33 schwarze 196: vbl = p->offset;
1.66 schwarze 197:
198: /* use pending tabs on the new line */
199:
200: if (0 < ntab)
201: vbl += ntab * p->tabwidth;
1.33 schwarze 202:
1.73 schwarze 203: /*
204: * Remove the p->overstep width.
205: * Again, if p->overstep is negative,
206: * sign extension does the right thing.
207: */
1.33 schwarze 208:
1.53 schwarze 209: bp += (size_t)p->overstep;
1.26 schwarze 210: p->overstep = 0;
1.1 kristaps 211: }
1.30 schwarze 212:
1.33 schwarze 213: /* Write out the [remaining] word. */
1.59 schwarze 214: for ( ; i < p->col; i++) {
1.25 schwarze 215: if (vend > bp && jhy > 0 && i > jhy)
1.30 schwarze 216: break;
217: if ('\t' == p->buf[i])
1.1 kristaps 218: break;
1.22 schwarze 219: if (' ' == p->buf[i]) {
1.46 schwarze 220: j = i;
1.88 schwarze 221: while (i < p->col && ' ' == p->buf[i])
1.33 schwarze 222: i++;
1.71 schwarze 223: dv = (i - j) * (*p->width)(p, ' ');
1.51 schwarze 224: vbl += dv;
225: vend += dv;
1.22 schwarze 226: break;
227: }
1.33 schwarze 228: if (ASCII_NBRSP == p->buf[i]) {
1.42 schwarze 229: vbl += (*p->width)(p, ' ');
1.33 schwarze 230: continue;
231: }
1.77 schwarze 232: if (ASCII_BREAK == p->buf[i])
233: continue;
1.33 schwarze 234:
235: /*
236: * Now we definitely know there will be
237: * printable characters to output,
238: * so write preceding white space now.
239: */
240: if (vbl) {
1.37 schwarze 241: (*p->advance)(p, vbl);
1.33 schwarze 242: p->viscol += vbl;
243: vbl = 0;
1.61 schwarze 244: }
245:
246: (*p->letter)(p, p->buf[i]);
247: if (8 == p->buf[i])
248: p->viscol -= (*p->width)(p, p->buf[i-1]);
1.83 schwarze 249: else
1.42 schwarze 250: p->viscol += (*p->width)(p, p->buf[i]);
1.1 kristaps 251: }
1.22 schwarze 252: vis = vend;
1.1 kristaps 253: }
1.48 schwarze 254:
255: /*
256: * If there was trailing white space, it was not printed;
257: * so reset the cursor position accordingly.
258: */
1.95 schwarze 259: if (vis > vbl)
1.61 schwarze 260: vis -= vbl;
1.95 schwarze 261: else
262: vis = 0;
1.18 schwarze 263:
1.9 schwarze 264: p->col = 0;
1.26 schwarze 265: p->overstep = 0;
1.1 kristaps 266:
1.9 schwarze 267: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 268: p->viscol = 0;
1.37 schwarze 269: (*p->endline)(p);
1.1 kristaps 270: return;
271: }
272:
1.9 schwarze 273: if (TERMP_HANG & p->flags) {
1.102 schwarze 274: p->overstep += (int)(p->offset + vis - p->rmargin +
1.83 schwarze 275: p->trailspace * (*p->width)(p, ' '));
1.9 schwarze 276:
277: /*
278: * If we have overstepped the margin, temporarily move
279: * it to the right and flag the rest of the line to be
280: * shorter.
1.73 schwarze 281: * If there is a request to keep the columns together,
282: * allow negative overstep when the column is not full.
1.9 schwarze 283: */
1.73 schwarze 284: if (p->trailspace && p->overstep < 0)
1.26 schwarze 285: p->overstep = 0;
1.61 schwarze 286: return;
1.9 schwarze 287:
288: } else if (TERMP_DANGLE & p->flags)
289: return;
1.1 kristaps 290:
1.61 schwarze 291: /* If the column was overrun, break the line. */
1.72 schwarze 292: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.37 schwarze 293: (*p->endline)(p);
1.61 schwarze 294: p->viscol = 0;
1.9 schwarze 295: }
1.1 kristaps 296: }
297:
1.83 schwarze 298: /*
1.1 kristaps 299: * A newline only breaks an existing line; it won't assert vertical
300: * space. All data in the output buffer is flushed prior to the newline
301: * assertion.
302: */
303: void
304: term_newln(struct termp *p)
305: {
306:
307: p->flags |= TERMP_NOSPACE;
1.61 schwarze 308: if (p->col || p->viscol)
309: term_flushln(p);
1.1 kristaps 310: }
311:
312: /*
313: * Asserts a vertical space (a full, empty line-break between lines).
314: * Note that if used twice, this will cause two blank spaces and so on.
315: * All data in the output buffer is flushed prior to the newline
316: * assertion.
317: */
318: void
319: term_vspace(struct termp *p)
320: {
321:
322: term_newln(p);
1.29 schwarze 323: p->viscol = 0;
1.63 schwarze 324: if (0 < p->skipvsp)
325: p->skipvsp--;
326: else
327: (*p->endline)(p);
1.1 kristaps 328: }
329:
1.98 schwarze 330: /* Swap current and previous font; for \fP and .ft P */
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:
1.98 schwarze 341: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.20 schwarze 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:
1.98 schwarze 350: /* Set font, save previous. */
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: p->fontl = p->fontq[p->fonti];
1.98 schwarze 356: if (++p->fonti == p->fontsz) {
357: p->fontsz += 8;
358: p->fontq = mandoc_reallocarray(p->fontq,
359: p->fontsz, sizeof(enum termfont *));
360: }
361: p->fontq[p->fonti] = f;
1.20 schwarze 362: }
1.1 kristaps 363:
1.98 schwarze 364: /* Flush to make the saved pointer current again. */
1.20 schwarze 365: void
1.104 schwarze 366: term_fontpopq(struct termp *p, int i)
1.20 schwarze 367: {
1.1 kristaps 368:
1.104 schwarze 369: assert(i >= 0);
370: if (p->fonti > i)
371: p->fonti = i;
1.20 schwarze 372: }
1.1 kristaps 373:
1.98 schwarze 374: /* Pop one font off the stack. */
1.20 schwarze 375: void
376: term_fontpop(struct termp *p)
377: {
1.1 kristaps 378:
1.20 schwarze 379: assert(p->fonti);
380: p->fonti--;
1.1 kristaps 381: }
382:
383: /*
384: * Handle pwords, partial words, which may be either a single word or a
385: * phrase that cannot be broken down (such as a literal string). This
386: * handles word styling.
387: */
1.7 schwarze 388: void
389: term_word(struct termp *p, const char *word)
1.1 kristaps 390: {
1.75 schwarze 391: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.59 schwarze 392: const char *seq, *cp;
393: int sz, uc;
1.20 schwarze 394: size_t ssz;
1.59 schwarze 395: enum mandoc_esc esc;
1.1 kristaps 396:
1.31 schwarze 397: if ( ! (TERMP_NOSPACE & p->flags)) {
1.40 schwarze 398: if ( ! (TERMP_KEEP & p->flags)) {
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: }
1.68 schwarze 405: if (TERMP_PREKEEP & p->flags)
406: p->flags |= TERMP_KEEP;
1.1 kristaps 407:
408: if ( ! (p->flags & TERMP_NONOSPACE))
409: p->flags &= ~TERMP_NOSPACE;
1.46 schwarze 410: else
411: p->flags |= TERMP_NOSPACE;
1.1 kristaps 412:
1.97 schwarze 413: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
1.105 ! schwarze 414: p->skipvsp = 0;
1.31 schwarze 415:
1.59 schwarze 416: while ('\0' != *word) {
1.64 schwarze 417: if ('\\' != *word) {
418: if (TERMP_SKIPCHAR & p->flags) {
419: p->flags &= ~TERMP_SKIPCHAR;
420: word++;
421: continue;
422: }
1.75 schwarze 423: if (TERMP_NBRWORD & p->flags) {
424: if (' ' == *word) {
425: encode(p, nbrsp, 1);
426: word++;
427: continue;
428: }
429: ssz = strcspn(word, "\\ ");
430: } else
431: ssz = strcspn(word, "\\");
1.45 schwarze 432: encode(p, word, ssz);
1.64 schwarze 433: word += (int)ssz;
1.20 schwarze 434: continue;
1.64 schwarze 435: }
1.20 schwarze 436:
1.59 schwarze 437: word++;
438: esc = mandoc_escape(&word, &seq, &sz);
439: if (ESCAPE_ERROR == esc)
1.85 schwarze 440: continue;
1.59 schwarze 441:
442: switch (esc) {
1.83 schwarze 443: case ESCAPE_UNICODE:
1.89 schwarze 444: uc = mchars_num2uc(seq + 1, sz - 1);
1.56 schwarze 445: break;
1.83 schwarze 446: case ESCAPE_NUMBERED:
1.93 schwarze 447: uc = mchars_num2char(seq, sz);
448: if (uc < 0)
449: continue;
1.20 schwarze 450: break;
1.83 schwarze 451: case ESCAPE_SPECIAL:
1.89 schwarze 452: if (p->enc == TERMENC_ASCII) {
453: cp = mchars_spec2str(p->symtab,
454: seq, sz, &ssz);
1.92 schwarze 455: if (cp != NULL)
1.89 schwarze 456: encode(p, cp, ssz);
457: } else {
458: uc = mchars_spec2cp(p->symtab, seq, sz);
1.90 schwarze 459: if (uc > 0)
460: encode1(p, uc);
1.89 schwarze 461: }
1.93 schwarze 462: continue;
1.83 schwarze 463: case ESCAPE_FONTBOLD:
1.20 schwarze 464: term_fontrepl(p, TERMFONT_BOLD);
1.93 schwarze 465: continue;
1.83 schwarze 466: case ESCAPE_FONTITALIC:
1.20 schwarze 467: term_fontrepl(p, TERMFONT_UNDER);
1.93 schwarze 468: continue;
1.83 schwarze 469: case ESCAPE_FONTBI:
1.70 schwarze 470: term_fontrepl(p, TERMFONT_BI);
1.93 schwarze 471: continue;
1.83 schwarze 472: case ESCAPE_FONT:
1.59 schwarze 473: /* FALLTHROUGH */
1.83 schwarze 474: case ESCAPE_FONTROMAN:
1.20 schwarze 475: term_fontrepl(p, TERMFONT_NONE);
1.93 schwarze 476: continue;
1.83 schwarze 477: case ESCAPE_FONTPREV:
1.20 schwarze 478: term_fontlast(p);
1.93 schwarze 479: continue;
1.83 schwarze 480: case ESCAPE_NOSPACE:
1.64 schwarze 481: if (TERMP_SKIPCHAR & p->flags)
482: p->flags &= ~TERMP_SKIPCHAR;
483: else if ('\0' == *word)
1.97 schwarze 484: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.93 schwarze 485: continue;
1.83 schwarze 486: case ESCAPE_SKIPCHAR:
1.64 schwarze 487: p->flags |= TERMP_SKIPCHAR;
1.93 schwarze 488: continue;
1.103 schwarze 489: case ESCAPE_OVERSTRIKE:
490: cp = seq + sz;
491: while (seq < cp) {
492: if (*seq == '\\') {
493: mandoc_escape(&seq, NULL, NULL);
494: continue;
495: }
496: encode1(p, *seq++);
497: if (seq < cp)
498: encode(p, "\b", 1);
499: }
1.20 schwarze 500: default:
1.93 schwarze 501: continue;
502: }
503:
504: /*
505: * Common handling for Unicode and numbered
506: * character escape sequences.
507: */
508:
509: if (p->enc == TERMENC_ASCII) {
510: cp = ascii_uc2str(uc);
511: encode(p, cp, strlen(cp));
512: } else {
513: if ((uc < 0x20 && uc != 0x09) ||
514: (uc > 0x7E && uc < 0xA0))
515: uc = 0xFFFD;
516: encode1(p, uc);
1.20 schwarze 517: }
518: }
1.75 schwarze 519: p->flags &= ~TERMP_NBRWORD;
1.1 kristaps 520: }
521:
522: static void
1.71 schwarze 523: adjbuf(struct termp *p, size_t sz)
1.1 kristaps 524: {
525:
1.20 schwarze 526: if (0 == p->maxcols)
527: p->maxcols = 1024;
528: while (sz >= p->maxcols)
529: p->maxcols <<= 2;
530:
1.84 schwarze 531: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.1 kristaps 532: }
533:
1.4 schwarze 534: static void
1.20 schwarze 535: bufferc(struct termp *p, char c)
536: {
537:
538: if (p->col + 1 >= p->maxcols)
539: adjbuf(p, p->col + 1);
540:
1.59 schwarze 541: p->buf[p->col++] = c;
1.20 schwarze 542: }
543:
1.59 schwarze 544: /*
545: * See encode().
546: * Do this for a single (probably unicode) value.
547: * Does not check for non-decorated glyphs.
548: */
549: static void
550: encode1(struct termp *p, int c)
551: {
552: enum termfont f;
553:
1.64 schwarze 554: if (TERMP_SKIPCHAR & p->flags) {
555: p->flags &= ~TERMP_SKIPCHAR;
556: return;
557: }
558:
1.70 schwarze 559: if (p->col + 6 >= p->maxcols)
560: adjbuf(p, p->col + 6);
1.59 schwarze 561:
1.104 schwarze 562: f = p->fontq[p->fonti];
1.59 schwarze 563:
1.70 schwarze 564: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.59 schwarze 565: p->buf[p->col++] = '_';
1.70 schwarze 566: p->buf[p->col++] = 8;
567: }
568: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
569: if (ASCII_HYPH == c)
570: p->buf[p->col++] = '-';
571: else
572: p->buf[p->col++] = c;
573: p->buf[p->col++] = 8;
574: }
1.59 schwarze 575: p->buf[p->col++] = c;
576: }
1.20 schwarze 577:
578: static void
579: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 580: {
1.71 schwarze 581: size_t i;
1.59 schwarze 582:
1.64 schwarze 583: if (TERMP_SKIPCHAR & p->flags) {
584: p->flags &= ~TERMP_SKIPCHAR;
585: return;
586: }
587:
1.20 schwarze 588: /*
589: * Encode and buffer a string of characters. If the current
590: * font mode is unset, buffer directly, else encode then buffer
591: * character by character.
592: */
593:
1.104 schwarze 594: if (p->fontq[p->fonti] == TERMFONT_NONE) {
1.83 schwarze 595: if (p->col + sz >= p->maxcols)
1.71 schwarze 596: adjbuf(p, p->col + sz);
597: for (i = 0; i < sz; i++)
1.59 schwarze 598: p->buf[p->col++] = word[i];
1.20 schwarze 599: return;
600: }
601:
1.46 schwarze 602: /* Pre-buffer, assuming worst-case. */
603:
1.71 schwarze 604: if (p->col + 1 + (sz * 5) >= p->maxcols)
605: adjbuf(p, p->col + 1 + (sz * 5));
1.46 schwarze 606:
1.71 schwarze 607: for (i = 0; i < sz; i++) {
1.70 schwarze 608: if (ASCII_HYPH == word[i] ||
609: isgraph((unsigned char)word[i]))
610: encode1(p, word[i]);
1.20 schwarze 611: else
1.59 schwarze 612: p->buf[p->col++] = word[i];
1.4 schwarze 613: }
1.80 schwarze 614: }
615:
616: void
617: term_setwidth(struct termp *p, const char *wstr)
618: {
619: struct roffsu su;
620: size_t width;
621: int iop;
622:
1.81 schwarze 623: iop = 0;
624: width = 0;
1.80 schwarze 625: if (NULL != wstr) {
626: switch (*wstr) {
1.83 schwarze 627: case '+':
1.80 schwarze 628: iop = 1;
629: wstr++;
630: break;
1.83 schwarze 631: case '-':
1.80 schwarze 632: iop = -1;
633: wstr++;
634: break;
635: default:
636: break;
637: }
1.81 schwarze 638: if (a2roffsu(wstr, &su, SCALE_MAX))
639: width = term_hspan(p, &su);
640: else
1.80 schwarze 641: iop = 0;
642: }
643: (*p->setwidth)(p, iop, width);
1.4 schwarze 644: }
1.16 schwarze 645:
646: size_t
1.39 schwarze 647: term_len(const struct termp *p, size_t sz)
648: {
649:
650: return((*p->width)(p, ' ') * sz);
651: }
652:
1.64 schwarze 653: static size_t
654: cond_width(const struct termp *p, int c, int *skip)
655: {
656:
657: if (*skip) {
658: (*skip) = 0;
659: return(0);
660: } else
661: return((*p->width)(p, c));
662: }
1.39 schwarze 663:
664: size_t
665: term_strlen(const struct termp *p, const char *cp)
666: {
1.59 schwarze 667: size_t sz, rsz, i;
1.93 schwarze 668: int ssz, skip, uc;
1.50 schwarze 669: const char *seq, *rhs;
1.59 schwarze 670: enum mandoc_esc esc;
1.77 schwarze 671: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
672: ASCII_BREAK, '\0' };
1.59 schwarze 673:
674: /*
675: * Account for escaped sequences within string length
676: * calculations. This follows the logic in term_word() as we
677: * must calculate the width of produced strings.
678: */
679:
680: sz = 0;
1.64 schwarze 681: skip = 0;
1.59 schwarze 682: while ('\0' != *cp) {
683: rsz = strcspn(cp, rej);
684: for (i = 0; i < rsz; i++)
1.64 schwarze 685: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 686:
687: switch (*cp) {
1.83 schwarze 688: case '\\':
1.59 schwarze 689: cp++;
690: esc = mandoc_escape(&cp, &seq, &ssz);
691: if (ESCAPE_ERROR == esc)
1.85 schwarze 692: continue;
1.59 schwarze 693:
694: rhs = NULL;
1.50 schwarze 695:
1.59 schwarze 696: switch (esc) {
1.83 schwarze 697: case ESCAPE_UNICODE:
1.94 schwarze 698: uc = mchars_num2uc(seq + 1, ssz - 1);
1.59 schwarze 699: break;
1.83 schwarze 700: case ESCAPE_NUMBERED:
1.93 schwarze 701: uc = mchars_num2char(seq, ssz);
702: if (uc < 0)
703: continue;
1.50 schwarze 704: break;
1.83 schwarze 705: case ESCAPE_SPECIAL:
1.93 schwarze 706: if (p->enc == TERMENC_ASCII) {
1.89 schwarze 707: rhs = mchars_spec2str(p->symtab,
708: seq, ssz, &rsz);
1.93 schwarze 709: if (rhs != NULL)
710: break;
711: } else {
712: uc = mchars_spec2cp(p->symtab,
1.89 schwarze 713: seq, ssz);
1.93 schwarze 714: if (uc > 0)
715: sz += cond_width(p, uc, &skip);
1.89 schwarze 716: }
1.93 schwarze 717: continue;
1.83 schwarze 718: case ESCAPE_SKIPCHAR:
1.64 schwarze 719: skip = 1;
1.103 schwarze 720: continue;
721: case ESCAPE_OVERSTRIKE:
722: rsz = 0;
723: rhs = seq + ssz;
724: while (seq < rhs) {
725: if (*seq == '\\') {
726: mandoc_escape(&seq, NULL, NULL);
727: continue;
728: }
729: i = (*p->width)(p, *seq++);
730: if (rsz < i)
731: rsz = i;
732: }
733: sz += rsz;
1.93 schwarze 734: continue;
1.50 schwarze 735: default:
1.93 schwarze 736: continue;
1.50 schwarze 737: }
1.39 schwarze 738:
1.93 schwarze 739: /*
740: * Common handling for Unicode and numbered
741: * character escape sequences.
742: */
743:
744: if (rhs == NULL) {
745: if (p->enc == TERMENC_ASCII) {
746: rhs = ascii_uc2str(uc);
747: rsz = strlen(rhs);
748: } else {
749: if ((uc < 0x20 && uc != 0x09) ||
750: (uc > 0x7E && uc < 0xA0))
751: uc = 0xFFFD;
752: sz += cond_width(p, uc, &skip);
753: continue;
754: }
755: }
1.59 schwarze 756:
1.64 schwarze 757: if (skip) {
758: skip = 0;
759: break;
760: }
1.93 schwarze 761:
762: /*
763: * Common handling for all escape sequences
764: * printing more than one character.
765: */
1.64 schwarze 766:
1.59 schwarze 767: for (i = 0; i < rsz; i++)
768: sz += (*p->width)(p, *rhs++);
769: break;
1.83 schwarze 770: case ASCII_NBRSP:
1.64 schwarze 771: sz += cond_width(p, ' ', &skip);
1.55 schwarze 772: cp++;
1.59 schwarze 773: break;
1.83 schwarze 774: case ASCII_HYPH:
1.64 schwarze 775: sz += cond_width(p, '-', &skip);
1.55 schwarze 776: cp++;
1.77 schwarze 777: /* FALLTHROUGH */
1.83 schwarze 778: case ASCII_BREAK:
1.59 schwarze 779: break;
780: default:
781: break;
782: }
783: }
1.39 schwarze 784:
785: return(sz);
786: }
787:
1.100 schwarze 788: int
1.39 schwarze 789: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 790: {
791: double r;
1.101 schwarze 792: int ri;
1.16 schwarze 793:
794: switch (su->unit) {
1.99 schwarze 795: case SCALE_BU:
796: r = su->scale / 40.0;
797: break;
1.83 schwarze 798: case SCALE_CM:
1.99 schwarze 799: r = su->scale * 6.0 / 2.54;
800: break;
801: case SCALE_FS:
802: r = su->scale * 65536.0 / 40.0;
1.16 schwarze 803: break;
1.83 schwarze 804: case SCALE_IN:
1.86 schwarze 805: r = su->scale * 6.0;
1.16 schwarze 806: break;
1.99 schwarze 807: case SCALE_MM:
808: r = su->scale * 0.006;
809: break;
1.83 schwarze 810: case SCALE_PC:
1.16 schwarze 811: r = su->scale;
812: break;
1.83 schwarze 813: case SCALE_PT:
1.99 schwarze 814: r = su->scale / 12.0;
1.16 schwarze 815: break;
1.99 schwarze 816: case SCALE_EN:
817: /* FALLTHROUGH */
818: case SCALE_EM:
819: r = su->scale * 0.6;
1.16 schwarze 820: break;
1.83 schwarze 821: case SCALE_VS:
1.16 schwarze 822: r = su->scale;
823: break;
824: default:
1.99 schwarze 825: abort();
826: /* NOTREACHED */
1.16 schwarze 827: }
1.101 schwarze 828: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
829: return(ri < 66 ? ri : 1);
1.16 schwarze 830: }
831:
1.100 schwarze 832: int
1.39 schwarze 833: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 834: {
1.44 schwarze 835: double v;
1.16 schwarze 836:
1.86 schwarze 837: v = (*p->hspan)(p, su);
1.100 schwarze 838: return(v > 0.0 ? v + 0.0005 : v - 0.0005);
1.16 schwarze 839: }
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