Annotation of src/usr.bin/mandoc/term.c, Revision 1.129
1.129 ! schwarze 1: /* $OpenBSD: term.c,v 1.128 2017/06/08 12:54:40 schwarze Exp $ */
1.1 kristaps 2: /*
1.59 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.119 schwarze 4: * Copyright (c) 2010-2017 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: *
1.106 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.2 schwarze 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.106 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.2 schwarze 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 *);
1.126 schwarze 33: static void adjbuf(struct termp_col *, 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);
1.124 schwarze 37: static void endline(struct termp *);
1.1 kristaps 38:
1.83 schwarze 39:
1.37 schwarze 40: void
1.129 ! schwarze 41: term_setcol(struct termp *p, size_t maxtcol)
! 42: {
! 43: if (maxtcol > p->maxtcol) {
! 44: p->tcols = mandoc_recallocarray(p->tcols,
! 45: p->maxtcol, maxtcol, sizeof(*p->tcols));
! 46: p->maxtcol = maxtcol;
! 47: }
! 48: p->lasttcol = maxtcol - 1;
! 49: p->tcol = p->tcols;
! 50: }
! 51:
! 52: void
1.37 schwarze 53: term_free(struct termp *p)
1.1 kristaps 54: {
1.126 schwarze 55: for (p->tcol = p->tcols; p->tcol < p->tcols + p->maxtcol; p->tcol++)
56: free(p->tcol->buf);
57: free(p->tcols);
1.98 schwarze 58: free(p->fontq);
1.37 schwarze 59: free(p);
1.1 kristaps 60: }
61:
1.13 schwarze 62: void
1.83 schwarze 63: term_begin(struct termp *p, term_margin head,
1.106 schwarze 64: term_margin foot, const struct roff_meta *arg)
1.1 kristaps 65: {
66:
1.37 schwarze 67: p->headf = head;
68: p->footf = foot;
69: p->argf = arg;
70: (*p->begin)(p);
1.1 kristaps 71: }
72:
1.37 schwarze 73: void
74: term_end(struct termp *p)
1.1 kristaps 75: {
76:
1.37 schwarze 77: (*p->end)(p);
1.1 kristaps 78: }
79:
80: /*
1.82 schwarze 81: * Flush a chunk of text. By default, break the output line each time
82: * the right margin is reached, and continue output on the next line
83: * at the same offset as the chunk itself. By default, also break the
84: * output line at the end of the chunk.
1.27 schwarze 85: * The following flags may be specified:
1.1 kristaps 86: *
1.82 schwarze 87: * - TERMP_NOBREAK: Do not break the output line at the right margin,
88: * but only at the max right margin. Also, do not break the output
89: * line at the end of the chunk, such that the next call can pad to
90: * the next column. However, if less than p->trailspace blanks,
91: * which can be 0, 1, or 2, remain to the right margin, the line
92: * will be broken.
1.110 schwarze 93: * - TERMP_BRTRSP: Consider trailing whitespace significant
94: * when deciding whether the chunk fits or not.
1.82 schwarze 95: * - TERMP_BRIND: If the chunk does not fit and the output line has
96: * to be broken, start the next line at the right margin instead
97: * of at the offset. Used together with TERMP_NOBREAK for the tags
98: * in various kinds of tagged lists.
1.123 schwarze 99: * - TERMP_HANG: Do not break the output line at the right margin,
1.82 schwarze 100: * append the next chunk after it even if this one is too long.
101: * To be used together with TERMP_NOBREAK.
1.123 schwarze 102: * - TERMP_NOPAD: Start writing at the current position,
103: * do not pad with blank characters up to the offset.
1.1 kristaps 104: */
105: void
106: term_flushln(struct termp *p)
107: {
1.19 schwarze 108: size_t vis; /* current visual position on output */
109: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 110: size_t vend; /* end of word visual position on output */
1.19 schwarze 111: size_t bp; /* visual right border position */
1.51 schwarze 112: size_t dv; /* temporary for visual pos calculations */
1.126 schwarze 113: size_t j; /* temporary loop index for p->tcol->buf */
1.71 schwarze 114: size_t jhy; /* last hyph before overflow w/r/t j */
1.42 schwarze 115: size_t maxvis; /* output position of visible boundary */
1.126 schwarze 116: int ntab; /* number of tabs to prepend */
1.1 kristaps 117:
1.126 schwarze 118: vbl = (p->flags & TERMP_NOPAD) || p->tcol->offset < p->viscol ?
119: 0 : p->tcol->offset - p->viscol;
1.123 schwarze 120: if (p->minbl && vbl < p->minbl)
121: vbl = p->minbl;
1.126 schwarze 122: maxvis = p->tcol->rmargin > p->viscol + vbl ?
123: p->tcol->rmargin - p->viscol - vbl : 0;
1.123 schwarze 124: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
125: p->maxrmargin > p->viscol + vbl ?
126: p->maxrmargin - p->viscol - vbl : 0;
1.53 schwarze 127: vis = vend = 0;
1.19 schwarze 128:
1.129 ! schwarze 129: if ((p->flags && TERMP_MULTICOL) == 0)
1.127 schwarze 130: p->tcol->col = 0;
1.129 ! schwarze 131: while (p->tcol->col < p->tcol->lastcol) {
1.127 schwarze 132:
1.22 schwarze 133: /*
1.42 schwarze 134: * Handle literal tab characters: collapse all
135: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 136: */
1.127 schwarze 137:
1.66 schwarze 138: ntab = 0;
1.129 ! schwarze 139: while (p->tcol->col < p->tcol->lastcol &&
1.127 schwarze 140: p->tcol->buf[p->tcol->col] == '\t') {
1.120 schwarze 141: vend = term_tab_next(vis);
1.30 schwarze 142: vbl += vend - vis;
143: vis = vend;
1.66 schwarze 144: ntab++;
1.127 schwarze 145: p->tcol->col++;
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:
1.127 schwarze 155: jhy = 0;
1.129 ! schwarze 156: for (j = p->tcol->col; j < p->tcol->lastcol; j++) {
1.126 schwarze 157: if (p->tcol->buf[j] == ' ' || p->tcol->buf[j] == '\t')
1.1 kristaps 158: break;
1.42 schwarze 159:
1.117 krw 160: /* Back over the last printed character. */
1.126 schwarze 161: if (p->tcol->buf[j] == '\b') {
1.42 schwarze 162: assert(j);
1.126 schwarze 163: vend -= (*p->width)(p, p->tcol->buf[j - 1]);
1.42 schwarze 164: continue;
165: }
166:
167: /* Regular word. */
168: /* Break at the hyphen point if we overrun. */
1.83 schwarze 169: if (vend > vis && vend < bp &&
1.126 schwarze 170: (p->tcol->buf[j] == ASCII_HYPH||
171: p->tcol->buf[j] == ASCII_BREAK))
1.42 schwarze 172: jhy = j;
173:
1.78 schwarze 174: /*
175: * Hyphenation now decided, put back a real
176: * hyphen such that we get the correct width.
177: */
1.126 schwarze 178: if (p->tcol->buf[j] == ASCII_HYPH)
179: p->tcol->buf[j] = '-';
1.78 schwarze 180:
1.126 schwarze 181: vend += (*p->width)(p, p->tcol->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: */
1.127 schwarze 188:
189: if (vend > bp && jhy == 0 && vis > 0 &&
1.124 schwarze 190: (p->flags & TERMP_BRNEVER) == 0) {
1.129 ! schwarze 191: if (p->flags & TERMP_MULTICOL)
1.127 schwarze 192: return;
193:
194: endline(p);
1.22 schwarze 195: vend -= vis;
1.66 schwarze 196:
1.120 schwarze 197: /* Use pending tabs on the new line. */
198:
199: vbl = 0;
200: while (ntab--)
201: vbl = term_tab_next(vbl);
202:
203: /* Re-establish indentation. */
1.66 schwarze 204:
1.123 schwarze 205: if (p->flags & TERMP_BRIND)
1.126 schwarze 206: vbl += p->tcol->rmargin;
1.123 schwarze 207: else
1.126 schwarze 208: vbl += p->tcol->offset;
209: maxvis = p->tcol->rmargin > vbl ?
210: p->tcol->rmargin - vbl : 0;
1.123 schwarze 211: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
212: p->maxrmargin > vbl ? p->maxrmargin - vbl : 0;
1.1 kristaps 213: }
1.30 schwarze 214:
1.127 schwarze 215: /*
216: * Write out the rest of the word.
217: */
218:
1.129 ! schwarze 219: for ( ; p->tcol->col < p->tcol->lastcol; p->tcol->col++) {
1.127 schwarze 220: if (vend > bp && jhy > 0 && p->tcol->col > jhy)
1.30 schwarze 221: break;
1.127 schwarze 222: if (p->tcol->buf[p->tcol->col] == '\t')
1.1 kristaps 223: break;
1.127 schwarze 224: if (p->tcol->buf[p->tcol->col] == ' ') {
225: j = p->tcol->col;
1.129 ! schwarze 226: while (p->tcol->col < p->tcol->lastcol &&
1.127 schwarze 227: p->tcol->buf[p->tcol->col] == ' ')
228: p->tcol->col++;
229: dv = (p->tcol->col - j) * (*p->width)(p, ' ');
1.51 schwarze 230: vbl += dv;
231: vend += dv;
1.22 schwarze 232: break;
233: }
1.127 schwarze 234: if (p->tcol->buf[p->tcol->col] == ASCII_NBRSP) {
1.42 schwarze 235: vbl += (*p->width)(p, ' ');
1.33 schwarze 236: continue;
237: }
1.127 schwarze 238: if (p->tcol->buf[p->tcol->col] == ASCII_BREAK)
1.77 schwarze 239: continue;
1.33 schwarze 240:
241: /*
242: * Now we definitely know there will be
243: * printable characters to output,
244: * so write preceding white space now.
245: */
246: if (vbl) {
1.37 schwarze 247: (*p->advance)(p, vbl);
1.33 schwarze 248: p->viscol += vbl;
249: vbl = 0;
1.61 schwarze 250: }
251:
1.127 schwarze 252: (*p->letter)(p, p->tcol->buf[p->tcol->col]);
253: if (p->tcol->buf[p->tcol->col] == '\b')
254: p->viscol -= (*p->width)(p,
255: p->tcol->buf[p->tcol->col - 1]);
1.83 schwarze 256: else
1.127 schwarze 257: p->viscol += (*p->width)(p,
258: p->tcol->buf[p->tcol->col]);
1.1 kristaps 259: }
1.22 schwarze 260: vis = vend;
1.1 kristaps 261: }
1.48 schwarze 262:
263: /*
264: * If there was trailing white space, it was not printed;
265: * so reset the cursor position accordingly.
266: */
1.127 schwarze 267:
1.95 schwarze 268: if (vis > vbl)
1.61 schwarze 269: vis -= vbl;
1.95 schwarze 270: else
271: vis = 0;
1.18 schwarze 272:
1.129 ! schwarze 273: p->col = p->tcol->col = p->tcol->lastcol = 0;
1.124 schwarze 274: p->minbl = p->trailspace;
1.123 schwarze 275: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD);
1.1 kristaps 276:
1.129 ! schwarze 277: if (p->flags & TERMP_MULTICOL)
! 278: return;
! 279:
1.110 schwarze 280: /* Trailing whitespace is significant in some columns. */
1.127 schwarze 281:
1.110 schwarze 282: if (vis && vbl && (TERMP_BRTRSP & p->flags))
283: vis += vbl;
1.1 kristaps 284:
1.61 schwarze 285: /* If the column was overrun, break the line. */
1.124 schwarze 286: if ((p->flags & TERMP_NOBREAK) == 0 ||
287: ((p->flags & TERMP_HANG) == 0 &&
288: vis + p->trailspace * (*p->width)(p, ' ') > maxvis))
289: endline(p);
290: }
291:
292: static void
293: endline(struct termp *p)
294: {
295: if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) {
296: p->mc = NULL;
297: p->flags &= ~TERMP_ENDMC;
298: }
299: if (p->mc != NULL) {
300: if (p->viscol && p->maxrmargin >= p->viscol)
301: (*p->advance)(p, p->maxrmargin - p->viscol + 1);
302: p->flags |= TERMP_NOBUF | TERMP_NOSPACE;
303: term_word(p, p->mc);
304: p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC);
305: }
306: p->viscol = 0;
307: p->minbl = 0;
308: (*p->endline)(p);
1.1 kristaps 309: }
310:
1.83 schwarze 311: /*
1.1 kristaps 312: * A newline only breaks an existing line; it won't assert vertical
313: * space. All data in the output buffer is flushed prior to the newline
314: * assertion.
315: */
316: void
317: term_newln(struct termp *p)
318: {
319:
320: p->flags |= TERMP_NOSPACE;
1.129 ! schwarze 321: if (p->tcol->lastcol || p->viscol)
1.61 schwarze 322: term_flushln(p);
1.1 kristaps 323: }
324:
325: /*
326: * Asserts a vertical space (a full, empty line-break between lines).
327: * Note that if used twice, this will cause two blank spaces and so on.
328: * All data in the output buffer is flushed prior to the newline
329: * assertion.
330: */
331: void
332: term_vspace(struct termp *p)
333: {
334:
335: term_newln(p);
1.29 schwarze 336: p->viscol = 0;
1.124 schwarze 337: p->minbl = 0;
1.63 schwarze 338: if (0 < p->skipvsp)
339: p->skipvsp--;
340: else
341: (*p->endline)(p);
1.1 kristaps 342: }
343:
1.98 schwarze 344: /* Swap current and previous font; for \fP and .ft P */
1.20 schwarze 345: void
346: term_fontlast(struct termp *p)
347: {
348: enum termfont f;
1.11 schwarze 349:
1.20 schwarze 350: f = p->fontl;
351: p->fontl = p->fontq[p->fonti];
352: p->fontq[p->fonti] = f;
353: }
354:
1.98 schwarze 355: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.20 schwarze 356: void
357: term_fontrepl(struct termp *p, enum termfont f)
358: {
359:
360: p->fontl = p->fontq[p->fonti];
361: p->fontq[p->fonti] = f;
1.1 kristaps 362: }
363:
1.98 schwarze 364: /* Set font, save previous. */
1.20 schwarze 365: void
366: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 367: {
1.7 schwarze 368:
1.20 schwarze 369: p->fontl = p->fontq[p->fonti];
1.98 schwarze 370: if (++p->fonti == p->fontsz) {
371: p->fontsz += 8;
372: p->fontq = mandoc_reallocarray(p->fontq,
1.116 schwarze 373: p->fontsz, sizeof(*p->fontq));
1.98 schwarze 374: }
375: p->fontq[p->fonti] = f;
1.20 schwarze 376: }
1.1 kristaps 377:
1.98 schwarze 378: /* Flush to make the saved pointer current again. */
1.20 schwarze 379: void
1.104 schwarze 380: term_fontpopq(struct termp *p, int i)
1.20 schwarze 381: {
1.1 kristaps 382:
1.104 schwarze 383: assert(i >= 0);
384: if (p->fonti > i)
385: p->fonti = i;
1.20 schwarze 386: }
1.1 kristaps 387:
1.98 schwarze 388: /* Pop one font off the stack. */
1.20 schwarze 389: void
390: term_fontpop(struct termp *p)
391: {
1.1 kristaps 392:
1.20 schwarze 393: assert(p->fonti);
394: p->fonti--;
1.1 kristaps 395: }
396:
397: /*
398: * Handle pwords, partial words, which may be either a single word or a
399: * phrase that cannot be broken down (such as a literal string). This
400: * handles word styling.
401: */
1.7 schwarze 402: void
403: term_word(struct termp *p, const char *word)
1.1 kristaps 404: {
1.121 schwarze 405: struct roffsu su;
1.75 schwarze 406: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.59 schwarze 407: const char *seq, *cp;
408: int sz, uc;
1.122 schwarze 409: size_t csz, lsz, ssz;
1.59 schwarze 410: enum mandoc_esc esc;
1.1 kristaps 411:
1.124 schwarze 412: if ((p->flags & TERMP_NOBUF) == 0) {
413: if ((p->flags & TERMP_NOSPACE) == 0) {
414: if ((p->flags & TERMP_KEEP) == 0) {
1.40 schwarze 415: bufferc(p, ' ');
1.124 schwarze 416: if (p->flags & TERMP_SENTENCE)
417: bufferc(p, ' ');
418: } else
419: bufferc(p, ASCII_NBRSP);
420: }
421: if (p->flags & TERMP_PREKEEP)
422: p->flags |= TERMP_KEEP;
423: if (p->flags & TERMP_NONOSPACE)
424: p->flags |= TERMP_NOSPACE;
425: else
426: p->flags &= ~TERMP_NOSPACE;
427: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
428: p->skipvsp = 0;
1.31 schwarze 429: }
430:
1.59 schwarze 431: while ('\0' != *word) {
1.64 schwarze 432: if ('\\' != *word) {
1.75 schwarze 433: if (TERMP_NBRWORD & p->flags) {
434: if (' ' == *word) {
435: encode(p, nbrsp, 1);
436: word++;
437: continue;
438: }
439: ssz = strcspn(word, "\\ ");
440: } else
441: ssz = strcspn(word, "\\");
1.45 schwarze 442: encode(p, word, ssz);
1.64 schwarze 443: word += (int)ssz;
1.20 schwarze 444: continue;
1.64 schwarze 445: }
1.20 schwarze 446:
1.59 schwarze 447: word++;
448: esc = mandoc_escape(&word, &seq, &sz);
449: if (ESCAPE_ERROR == esc)
1.85 schwarze 450: continue;
1.59 schwarze 451:
452: switch (esc) {
1.83 schwarze 453: case ESCAPE_UNICODE:
1.89 schwarze 454: uc = mchars_num2uc(seq + 1, sz - 1);
1.56 schwarze 455: break;
1.83 schwarze 456: case ESCAPE_NUMBERED:
1.93 schwarze 457: uc = mchars_num2char(seq, sz);
458: if (uc < 0)
459: continue;
1.20 schwarze 460: break;
1.83 schwarze 461: case ESCAPE_SPECIAL:
1.89 schwarze 462: if (p->enc == TERMENC_ASCII) {
1.114 schwarze 463: cp = mchars_spec2str(seq, sz, &ssz);
1.92 schwarze 464: if (cp != NULL)
1.89 schwarze 465: encode(p, cp, ssz);
466: } else {
1.114 schwarze 467: uc = mchars_spec2cp(seq, sz);
1.90 schwarze 468: if (uc > 0)
469: encode1(p, uc);
1.89 schwarze 470: }
1.93 schwarze 471: continue;
1.83 schwarze 472: case ESCAPE_FONTBOLD:
1.20 schwarze 473: term_fontrepl(p, TERMFONT_BOLD);
1.93 schwarze 474: continue;
1.83 schwarze 475: case ESCAPE_FONTITALIC:
1.20 schwarze 476: term_fontrepl(p, TERMFONT_UNDER);
1.93 schwarze 477: continue;
1.83 schwarze 478: case ESCAPE_FONTBI:
1.70 schwarze 479: term_fontrepl(p, TERMFONT_BI);
1.93 schwarze 480: continue;
1.83 schwarze 481: case ESCAPE_FONT:
482: case ESCAPE_FONTROMAN:
1.20 schwarze 483: term_fontrepl(p, TERMFONT_NONE);
1.93 schwarze 484: continue;
1.83 schwarze 485: case ESCAPE_FONTPREV:
1.20 schwarze 486: term_fontlast(p);
1.93 schwarze 487: continue;
1.83 schwarze 488: case ESCAPE_NOSPACE:
1.108 schwarze 489: if (p->flags & TERMP_BACKAFTER)
490: p->flags &= ~TERMP_BACKAFTER;
491: else if (*word == '\0')
1.97 schwarze 492: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.121 schwarze 493: continue;
494: case ESCAPE_HORIZ:
1.128 schwarze 495: if (a2roffsu(seq, &su, SCALE_EM) == NULL)
1.121 schwarze 496: continue;
497: uc = term_hspan(p, &su) / 24;
498: if (uc > 0)
499: while (uc-- > 0)
500: bufferc(p, ASCII_NBRSP);
501: else if (p->col > (size_t)(-uc))
502: p->col += uc;
503: else {
504: uc += p->col;
505: p->col = 0;
1.126 schwarze 506: if (p->tcol->offset > (size_t)(-uc)) {
1.121 schwarze 507: p->ti += uc;
1.126 schwarze 508: p->tcol->offset += uc;
1.121 schwarze 509: } else {
1.126 schwarze 510: p->ti -= p->tcol->offset;
511: p->tcol->offset = 0;
1.121 schwarze 512: }
1.122 schwarze 513: }
514: continue;
515: case ESCAPE_HLINE:
1.128 schwarze 516: if ((seq = a2roffsu(seq, &su, SCALE_EM)) == NULL)
1.122 schwarze 517: continue;
518: uc = term_hspan(p, &su) / 24;
519: if (uc <= 0) {
1.126 schwarze 520: if (p->tcol->rmargin <= p->tcol->offset)
1.122 schwarze 521: continue;
1.126 schwarze 522: lsz = p->tcol->rmargin - p->tcol->offset;
1.122 schwarze 523: } else
524: lsz = uc;
1.128 schwarze 525: if (*seq == '\0')
1.122 schwarze 526: uc = -1;
527: else if (*seq == '\\') {
528: seq++;
529: esc = mandoc_escape(&seq, &cp, &sz);
530: switch (esc) {
531: case ESCAPE_UNICODE:
532: uc = mchars_num2uc(cp + 1, sz - 1);
533: break;
534: case ESCAPE_NUMBERED:
535: uc = mchars_num2char(cp, sz);
536: break;
537: case ESCAPE_SPECIAL:
538: uc = mchars_spec2cp(cp, sz);
539: break;
540: default:
541: uc = -1;
542: break;
543: }
544: } else
545: uc = *seq;
546: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
547: uc = '_';
548: if (p->enc == TERMENC_ASCII) {
549: cp = ascii_uc2str(uc);
550: csz = term_strlen(p, cp);
551: ssz = strlen(cp);
552: } else
553: csz = (*p->width)(p, uc);
554: while (lsz >= csz) {
555: if (p->enc == TERMENC_ASCII)
556: encode(p, cp, ssz);
557: else
558: encode1(p, uc);
559: lsz -= csz;
1.121 schwarze 560: }
1.93 schwarze 561: continue;
1.83 schwarze 562: case ESCAPE_SKIPCHAR:
1.108 schwarze 563: p->flags |= TERMP_BACKAFTER;
1.93 schwarze 564: continue;
1.103 schwarze 565: case ESCAPE_OVERSTRIKE:
566: cp = seq + sz;
567: while (seq < cp) {
568: if (*seq == '\\') {
569: mandoc_escape(&seq, NULL, NULL);
570: continue;
571: }
572: encode1(p, *seq++);
1.108 schwarze 573: if (seq < cp) {
574: if (p->flags & TERMP_BACKBEFORE)
575: p->flags |= TERMP_BACKAFTER;
576: else
577: p->flags |= TERMP_BACKBEFORE;
578: }
1.103 schwarze 579: }
1.109 schwarze 580: /* Trim trailing backspace/blank pair. */
1.129 ! schwarze 581: if (p->tcol->lastcol > 2 &&
! 582: (p->tcol->buf[p->tcol->lastcol - 1] == ' ' ||
! 583: p->tcol->buf[p->tcol->lastcol - 1] == '\t'))
! 584: p->tcol->lastcol -= 2;
! 585: if (p->col > p->tcol->lastcol)
! 586: p->col = p->tcol->lastcol;
1.108 schwarze 587: continue;
1.20 schwarze 588: default:
1.93 schwarze 589: continue;
590: }
591:
592: /*
593: * Common handling for Unicode and numbered
594: * character escape sequences.
595: */
596:
597: if (p->enc == TERMENC_ASCII) {
598: cp = ascii_uc2str(uc);
599: encode(p, cp, strlen(cp));
600: } else {
601: if ((uc < 0x20 && uc != 0x09) ||
602: (uc > 0x7E && uc < 0xA0))
603: uc = 0xFFFD;
604: encode1(p, uc);
1.20 schwarze 605: }
606: }
1.75 schwarze 607: p->flags &= ~TERMP_NBRWORD;
1.1 kristaps 608: }
609:
610: static void
1.126 schwarze 611: adjbuf(struct termp_col *c, size_t sz)
1.1 kristaps 612: {
1.126 schwarze 613: if (c->maxcols == 0)
614: c->maxcols = 1024;
615: while (c->maxcols <= sz)
616: c->maxcols <<= 2;
617: c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
1.1 kristaps 618: }
619:
1.4 schwarze 620: static void
1.20 schwarze 621: bufferc(struct termp *p, char c)
622: {
1.124 schwarze 623: if (p->flags & TERMP_NOBUF) {
624: (*p->letter)(p, c);
625: return;
626: }
1.126 schwarze 627: if (p->col + 1 >= p->tcol->maxcols)
628: adjbuf(p->tcol, p->col + 1);
1.129 ! schwarze 629: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.126 schwarze 630: p->tcol->buf[p->col] = c;
1.129 ! schwarze 631: if (p->tcol->lastcol < ++p->col)
! 632: p->tcol->lastcol = p->col;
1.20 schwarze 633: }
634:
1.59 schwarze 635: /*
636: * See encode().
637: * Do this for a single (probably unicode) value.
638: * Does not check for non-decorated glyphs.
639: */
640: static void
641: encode1(struct termp *p, int c)
642: {
643: enum termfont f;
644:
1.124 schwarze 645: if (p->flags & TERMP_NOBUF) {
646: (*p->letter)(p, c);
647: return;
648: }
649:
1.126 schwarze 650: if (p->col + 7 >= p->tcol->maxcols)
651: adjbuf(p->tcol, p->col + 7);
1.59 schwarze 652:
1.115 schwarze 653: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.108 schwarze 654: p->fontq[p->fonti] : TERMFONT_NONE;
1.59 schwarze 655:
1.108 schwarze 656: if (p->flags & TERMP_BACKBEFORE) {
1.126 schwarze 657: if (p->tcol->buf[p->col - 1] == ' ' ||
658: p->tcol->buf[p->col - 1] == '\t')
1.109 schwarze 659: p->col--;
660: else
1.126 schwarze 661: p->tcol->buf[p->col++] = '\b';
1.108 schwarze 662: p->flags &= ~TERMP_BACKBEFORE;
663: }
1.126 schwarze 664: if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
665: p->tcol->buf[p->col++] = '_';
666: p->tcol->buf[p->col++] = '\b';
667: }
668: if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
669: if (c == ASCII_HYPH)
670: p->tcol->buf[p->col++] = '-';
1.70 schwarze 671: else
1.126 schwarze 672: p->tcol->buf[p->col++] = c;
673: p->tcol->buf[p->col++] = '\b';
1.70 schwarze 674: }
1.129 ! schwarze 675: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.126 schwarze 676: p->tcol->buf[p->col] = c;
1.129 ! schwarze 677: if (p->tcol->lastcol < ++p->col)
! 678: p->tcol->lastcol = p->col;
1.108 schwarze 679: if (p->flags & TERMP_BACKAFTER) {
680: p->flags |= TERMP_BACKBEFORE;
681: p->flags &= ~TERMP_BACKAFTER;
682: }
1.59 schwarze 683: }
1.20 schwarze 684:
685: static void
686: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 687: {
1.71 schwarze 688: size_t i;
1.124 schwarze 689:
690: if (p->flags & TERMP_NOBUF) {
691: for (i = 0; i < sz; i++)
692: (*p->letter)(p, word[i]);
693: return;
694: }
1.59 schwarze 695:
1.126 schwarze 696: if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
697: adjbuf(p->tcol, p->col + 2 + (sz * 5));
1.46 schwarze 698:
1.71 schwarze 699: for (i = 0; i < sz; i++) {
1.70 schwarze 700: if (ASCII_HYPH == word[i] ||
701: isgraph((unsigned char)word[i]))
702: encode1(p, word[i]);
1.119 schwarze 703: else {
1.129 ! schwarze 704: if (p->tcol->lastcol <= p->col ||
1.125 schwarze 705: (word[i] != ' ' && word[i] != ASCII_NBRSP))
1.126 schwarze 706: p->tcol->buf[p->col] = word[i];
1.125 schwarze 707: p->col++;
1.119 schwarze 708:
709: /*
710: * Postpone the effect of \z while handling
711: * an overstrike sequence from ascii_uc2str().
712: */
713:
714: if (word[i] == '\b' &&
715: (p->flags & TERMP_BACKBEFORE)) {
716: p->flags &= ~TERMP_BACKBEFORE;
717: p->flags |= TERMP_BACKAFTER;
718: }
719: }
1.4 schwarze 720: }
1.129 ! schwarze 721: if (p->tcol->lastcol < p->col)
! 722: p->tcol->lastcol = p->col;
1.80 schwarze 723: }
724:
725: void
726: term_setwidth(struct termp *p, const char *wstr)
727: {
728: struct roffsu su;
1.107 schwarze 729: int iop, width;
1.80 schwarze 730:
1.81 schwarze 731: iop = 0;
732: width = 0;
1.80 schwarze 733: if (NULL != wstr) {
734: switch (*wstr) {
1.83 schwarze 735: case '+':
1.80 schwarze 736: iop = 1;
737: wstr++;
738: break;
1.83 schwarze 739: case '-':
1.80 schwarze 740: iop = -1;
741: wstr++;
742: break;
743: default:
744: break;
745: }
1.128 schwarze 746: if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
1.81 schwarze 747: width = term_hspan(p, &su);
748: else
1.80 schwarze 749: iop = 0;
750: }
751: (*p->setwidth)(p, iop, width);
1.4 schwarze 752: }
1.16 schwarze 753:
754: size_t
1.39 schwarze 755: term_len(const struct termp *p, size_t sz)
756: {
757:
1.112 schwarze 758: return (*p->width)(p, ' ') * sz;
1.39 schwarze 759: }
760:
1.64 schwarze 761: static size_t
762: cond_width(const struct termp *p, int c, int *skip)
763: {
764:
765: if (*skip) {
766: (*skip) = 0;
1.112 schwarze 767: return 0;
1.64 schwarze 768: } else
1.112 schwarze 769: return (*p->width)(p, c);
1.64 schwarze 770: }
1.39 schwarze 771:
772: size_t
773: term_strlen(const struct termp *p, const char *cp)
774: {
1.59 schwarze 775: size_t sz, rsz, i;
1.93 schwarze 776: int ssz, skip, uc;
1.50 schwarze 777: const char *seq, *rhs;
1.59 schwarze 778: enum mandoc_esc esc;
1.77 schwarze 779: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
780: ASCII_BREAK, '\0' };
1.59 schwarze 781:
782: /*
783: * Account for escaped sequences within string length
784: * calculations. This follows the logic in term_word() as we
785: * must calculate the width of produced strings.
786: */
787:
788: sz = 0;
1.64 schwarze 789: skip = 0;
1.59 schwarze 790: while ('\0' != *cp) {
791: rsz = strcspn(cp, rej);
792: for (i = 0; i < rsz; i++)
1.64 schwarze 793: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 794:
795: switch (*cp) {
1.83 schwarze 796: case '\\':
1.59 schwarze 797: cp++;
798: esc = mandoc_escape(&cp, &seq, &ssz);
799: if (ESCAPE_ERROR == esc)
1.85 schwarze 800: continue;
1.59 schwarze 801:
802: rhs = NULL;
1.50 schwarze 803:
1.59 schwarze 804: switch (esc) {
1.83 schwarze 805: case ESCAPE_UNICODE:
1.94 schwarze 806: uc = mchars_num2uc(seq + 1, ssz - 1);
1.59 schwarze 807: break;
1.83 schwarze 808: case ESCAPE_NUMBERED:
1.93 schwarze 809: uc = mchars_num2char(seq, ssz);
810: if (uc < 0)
811: continue;
1.50 schwarze 812: break;
1.83 schwarze 813: case ESCAPE_SPECIAL:
1.93 schwarze 814: if (p->enc == TERMENC_ASCII) {
1.114 schwarze 815: rhs = mchars_spec2str(seq, ssz, &rsz);
1.93 schwarze 816: if (rhs != NULL)
817: break;
818: } else {
1.114 schwarze 819: uc = mchars_spec2cp(seq, ssz);
1.93 schwarze 820: if (uc > 0)
821: sz += cond_width(p, uc, &skip);
1.89 schwarze 822: }
1.93 schwarze 823: continue;
1.83 schwarze 824: case ESCAPE_SKIPCHAR:
1.64 schwarze 825: skip = 1;
1.103 schwarze 826: continue;
827: case ESCAPE_OVERSTRIKE:
828: rsz = 0;
829: rhs = seq + ssz;
830: while (seq < rhs) {
831: if (*seq == '\\') {
832: mandoc_escape(&seq, NULL, NULL);
833: continue;
834: }
835: i = (*p->width)(p, *seq++);
836: if (rsz < i)
837: rsz = i;
838: }
839: sz += rsz;
1.93 schwarze 840: continue;
1.50 schwarze 841: default:
1.93 schwarze 842: continue;
1.50 schwarze 843: }
1.39 schwarze 844:
1.93 schwarze 845: /*
846: * Common handling for Unicode and numbered
847: * character escape sequences.
848: */
849:
850: if (rhs == NULL) {
851: if (p->enc == TERMENC_ASCII) {
852: rhs = ascii_uc2str(uc);
853: rsz = strlen(rhs);
854: } else {
855: if ((uc < 0x20 && uc != 0x09) ||
856: (uc > 0x7E && uc < 0xA0))
857: uc = 0xFFFD;
858: sz += cond_width(p, uc, &skip);
859: continue;
860: }
861: }
1.59 schwarze 862:
1.64 schwarze 863: if (skip) {
864: skip = 0;
865: break;
866: }
1.93 schwarze 867:
868: /*
869: * Common handling for all escape sequences
870: * printing more than one character.
871: */
1.64 schwarze 872:
1.59 schwarze 873: for (i = 0; i < rsz; i++)
874: sz += (*p->width)(p, *rhs++);
875: break;
1.83 schwarze 876: case ASCII_NBRSP:
1.64 schwarze 877: sz += cond_width(p, ' ', &skip);
1.55 schwarze 878: cp++;
1.59 schwarze 879: break;
1.83 schwarze 880: case ASCII_HYPH:
1.64 schwarze 881: sz += cond_width(p, '-', &skip);
1.55 schwarze 882: cp++;
1.59 schwarze 883: break;
884: default:
885: break;
886: }
887: }
1.39 schwarze 888:
1.112 schwarze 889: return sz;
1.39 schwarze 890: }
891:
1.100 schwarze 892: int
1.39 schwarze 893: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 894: {
895: double r;
1.101 schwarze 896: int ri;
1.16 schwarze 897:
898: switch (su->unit) {
1.99 schwarze 899: case SCALE_BU:
900: r = su->scale / 40.0;
901: break;
1.83 schwarze 902: case SCALE_CM:
1.99 schwarze 903: r = su->scale * 6.0 / 2.54;
904: break;
905: case SCALE_FS:
906: r = su->scale * 65536.0 / 40.0;
1.16 schwarze 907: break;
1.83 schwarze 908: case SCALE_IN:
1.86 schwarze 909: r = su->scale * 6.0;
1.16 schwarze 910: break;
1.99 schwarze 911: case SCALE_MM:
912: r = su->scale * 0.006;
913: break;
1.83 schwarze 914: case SCALE_PC:
1.16 schwarze 915: r = su->scale;
916: break;
1.83 schwarze 917: case SCALE_PT:
1.99 schwarze 918: r = su->scale / 12.0;
1.16 schwarze 919: break;
1.99 schwarze 920: case SCALE_EN:
921: case SCALE_EM:
922: r = su->scale * 0.6;
1.16 schwarze 923: break;
1.83 schwarze 924: case SCALE_VS:
1.16 schwarze 925: r = su->scale;
926: break;
927: default:
1.99 schwarze 928: abort();
1.16 schwarze 929: }
1.101 schwarze 930: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.112 schwarze 931: return ri < 66 ? ri : 1;
1.16 schwarze 932: }
933:
1.107 schwarze 934: /*
935: * Convert a scaling width to basic units, rounding down.
936: */
1.100 schwarze 937: int
1.39 schwarze 938: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 939: {
940:
1.112 schwarze 941: return (*p->hspan)(p, su);
1.16 schwarze 942: }
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