Annotation of src/usr.bin/mandoc/term.c, Revision 1.130
1.130 ! schwarze 1: /* $OpenBSD: term.c,v 1.129 2017/06/12 18:55:42 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 */
1.130 ! schwarze 117: int breakline; /* after this word */
1.1 kristaps 118:
1.126 schwarze 119: vbl = (p->flags & TERMP_NOPAD) || p->tcol->offset < p->viscol ?
120: 0 : p->tcol->offset - p->viscol;
1.123 schwarze 121: if (p->minbl && vbl < p->minbl)
122: vbl = p->minbl;
1.126 schwarze 123: maxvis = p->tcol->rmargin > p->viscol + vbl ?
124: p->tcol->rmargin - p->viscol - vbl : 0;
1.123 schwarze 125: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
126: p->maxrmargin > p->viscol + vbl ?
127: p->maxrmargin - p->viscol - vbl : 0;
1.53 schwarze 128: vis = vend = 0;
1.19 schwarze 129:
1.129 schwarze 130: if ((p->flags && TERMP_MULTICOL) == 0)
1.127 schwarze 131: p->tcol->col = 0;
1.129 schwarze 132: while (p->tcol->col < p->tcol->lastcol) {
1.127 schwarze 133:
1.22 schwarze 134: /*
1.42 schwarze 135: * Handle literal tab characters: collapse all
136: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 137: */
1.127 schwarze 138:
1.66 schwarze 139: ntab = 0;
1.129 schwarze 140: while (p->tcol->col < p->tcol->lastcol &&
1.127 schwarze 141: p->tcol->buf[p->tcol->col] == '\t') {
1.120 schwarze 142: vend = term_tab_next(vis);
1.30 schwarze 143: vbl += vend - vis;
144: vis = vend;
1.66 schwarze 145: ntab++;
1.127 schwarze 146: p->tcol->col++;
1.30 schwarze 147: }
1.22 schwarze 148:
1.1 kristaps 149: /*
150: * Count up visible word characters. Control sequences
151: * (starting with the CSI) aren't counted. A space
152: * generates a non-printing word, which is valid (the
153: * space is printed according to regular spacing rules).
154: */
155:
1.127 schwarze 156: jhy = 0;
1.130 ! schwarze 157: breakline = 0;
1.129 schwarze 158: for (j = p->tcol->col; j < p->tcol->lastcol; j++) {
1.130 ! schwarze 159: if (p->tcol->buf[j] == '\n') {
! 160: if ((p->flags & TERMP_BRIND) == 0)
! 161: breakline = 1;
! 162: continue;
! 163: }
1.126 schwarze 164: if (p->tcol->buf[j] == ' ' || p->tcol->buf[j] == '\t')
1.1 kristaps 165: break;
1.42 schwarze 166:
1.117 krw 167: /* Back over the last printed character. */
1.126 schwarze 168: if (p->tcol->buf[j] == '\b') {
1.42 schwarze 169: assert(j);
1.126 schwarze 170: vend -= (*p->width)(p, p->tcol->buf[j - 1]);
1.42 schwarze 171: continue;
172: }
173:
174: /* Regular word. */
175: /* Break at the hyphen point if we overrun. */
1.83 schwarze 176: if (vend > vis && vend < bp &&
1.126 schwarze 177: (p->tcol->buf[j] == ASCII_HYPH||
178: p->tcol->buf[j] == ASCII_BREAK))
1.42 schwarze 179: jhy = j;
180:
1.78 schwarze 181: /*
182: * Hyphenation now decided, put back a real
183: * hyphen such that we get the correct width.
184: */
1.126 schwarze 185: if (p->tcol->buf[j] == ASCII_HYPH)
186: p->tcol->buf[j] = '-';
1.78 schwarze 187:
1.126 schwarze 188: vend += (*p->width)(p, p->tcol->buf[j]);
1.1 kristaps 189: }
190:
191: /*
1.5 schwarze 192: * Find out whether we would exceed the right margin.
1.33 schwarze 193: * If so, break to the next line.
1.5 schwarze 194: */
1.127 schwarze 195:
196: if (vend > bp && jhy == 0 && vis > 0 &&
1.124 schwarze 197: (p->flags & TERMP_BRNEVER) == 0) {
1.129 schwarze 198: if (p->flags & TERMP_MULTICOL)
1.127 schwarze 199: return;
200:
201: endline(p);
1.22 schwarze 202: vend -= vis;
1.66 schwarze 203:
1.120 schwarze 204: /* Use pending tabs on the new line. */
205:
206: vbl = 0;
207: while (ntab--)
208: vbl = term_tab_next(vbl);
209:
210: /* Re-establish indentation. */
1.66 schwarze 211:
1.123 schwarze 212: if (p->flags & TERMP_BRIND)
1.126 schwarze 213: vbl += p->tcol->rmargin;
1.123 schwarze 214: else
1.126 schwarze 215: vbl += p->tcol->offset;
216: maxvis = p->tcol->rmargin > vbl ?
217: p->tcol->rmargin - vbl : 0;
1.123 schwarze 218: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
219: p->maxrmargin > vbl ? p->maxrmargin - vbl : 0;
1.1 kristaps 220: }
1.30 schwarze 221:
1.127 schwarze 222: /*
223: * Write out the rest of the word.
224: */
225:
1.129 schwarze 226: for ( ; p->tcol->col < p->tcol->lastcol; p->tcol->col++) {
1.127 schwarze 227: if (vend > bp && jhy > 0 && p->tcol->col > jhy)
1.30 schwarze 228: break;
1.130 ! schwarze 229: if (p->tcol->buf[p->tcol->col] == '\n')
! 230: continue;
1.127 schwarze 231: if (p->tcol->buf[p->tcol->col] == '\t')
1.1 kristaps 232: break;
1.127 schwarze 233: if (p->tcol->buf[p->tcol->col] == ' ') {
234: j = p->tcol->col;
1.129 schwarze 235: while (p->tcol->col < p->tcol->lastcol &&
1.127 schwarze 236: p->tcol->buf[p->tcol->col] == ' ')
237: p->tcol->col++;
238: dv = (p->tcol->col - j) * (*p->width)(p, ' ');
1.51 schwarze 239: vbl += dv;
240: vend += dv;
1.22 schwarze 241: break;
242: }
1.127 schwarze 243: if (p->tcol->buf[p->tcol->col] == ASCII_NBRSP) {
1.42 schwarze 244: vbl += (*p->width)(p, ' ');
1.33 schwarze 245: continue;
246: }
1.127 schwarze 247: if (p->tcol->buf[p->tcol->col] == ASCII_BREAK)
1.77 schwarze 248: continue;
1.33 schwarze 249:
250: /*
251: * Now we definitely know there will be
252: * printable characters to output,
253: * so write preceding white space now.
254: */
255: if (vbl) {
1.37 schwarze 256: (*p->advance)(p, vbl);
1.33 schwarze 257: p->viscol += vbl;
258: vbl = 0;
1.61 schwarze 259: }
260:
1.127 schwarze 261: (*p->letter)(p, p->tcol->buf[p->tcol->col]);
262: if (p->tcol->buf[p->tcol->col] == '\b')
263: p->viscol -= (*p->width)(p,
264: p->tcol->buf[p->tcol->col - 1]);
1.83 schwarze 265: else
1.127 schwarze 266: p->viscol += (*p->width)(p,
267: p->tcol->buf[p->tcol->col]);
1.1 kristaps 268: }
1.22 schwarze 269: vis = vend;
1.130 ! schwarze 270:
! 271: if (breakline == 0)
! 272: continue;
! 273:
! 274: /* Explicitly requested output line break. */
! 275:
! 276: if (p->flags & TERMP_MULTICOL)
! 277: return;
! 278:
! 279: endline(p);
! 280: breakline = 0;
! 281: vis = vend = 0;
! 282:
! 283: /* Re-establish indentation. */
! 284:
! 285: vbl = p->tcol->offset;
! 286: maxvis = p->tcol->rmargin > vbl ?
! 287: p->tcol->rmargin - vbl : 0;
! 288: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
! 289: p->maxrmargin > vbl ? p->maxrmargin - vbl : 0;
1.1 kristaps 290: }
1.48 schwarze 291:
292: /*
293: * If there was trailing white space, it was not printed;
294: * so reset the cursor position accordingly.
295: */
1.127 schwarze 296:
1.95 schwarze 297: if (vis > vbl)
1.61 schwarze 298: vis -= vbl;
1.95 schwarze 299: else
300: vis = 0;
1.18 schwarze 301:
1.129 schwarze 302: p->col = p->tcol->col = p->tcol->lastcol = 0;
1.124 schwarze 303: p->minbl = p->trailspace;
1.123 schwarze 304: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD);
1.1 kristaps 305:
1.129 schwarze 306: if (p->flags & TERMP_MULTICOL)
307: return;
308:
1.110 schwarze 309: /* Trailing whitespace is significant in some columns. */
1.127 schwarze 310:
1.110 schwarze 311: if (vis && vbl && (TERMP_BRTRSP & p->flags))
312: vis += vbl;
1.1 kristaps 313:
1.61 schwarze 314: /* If the column was overrun, break the line. */
1.124 schwarze 315: if ((p->flags & TERMP_NOBREAK) == 0 ||
316: ((p->flags & TERMP_HANG) == 0 &&
317: vis + p->trailspace * (*p->width)(p, ' ') > maxvis))
318: endline(p);
319: }
320:
321: static void
322: endline(struct termp *p)
323: {
324: if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) {
325: p->mc = NULL;
326: p->flags &= ~TERMP_ENDMC;
327: }
328: if (p->mc != NULL) {
329: if (p->viscol && p->maxrmargin >= p->viscol)
330: (*p->advance)(p, p->maxrmargin - p->viscol + 1);
331: p->flags |= TERMP_NOBUF | TERMP_NOSPACE;
332: term_word(p, p->mc);
333: p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC);
334: }
335: p->viscol = 0;
336: p->minbl = 0;
337: (*p->endline)(p);
1.1 kristaps 338: }
339:
1.83 schwarze 340: /*
1.1 kristaps 341: * A newline only breaks an existing line; it won't assert vertical
342: * space. All data in the output buffer is flushed prior to the newline
343: * assertion.
344: */
345: void
346: term_newln(struct termp *p)
347: {
348:
349: p->flags |= TERMP_NOSPACE;
1.129 schwarze 350: if (p->tcol->lastcol || p->viscol)
1.61 schwarze 351: term_flushln(p);
1.1 kristaps 352: }
353:
354: /*
355: * Asserts a vertical space (a full, empty line-break between lines).
356: * Note that if used twice, this will cause two blank spaces and so on.
357: * All data in the output buffer is flushed prior to the newline
358: * assertion.
359: */
360: void
361: term_vspace(struct termp *p)
362: {
363:
364: term_newln(p);
1.29 schwarze 365: p->viscol = 0;
1.124 schwarze 366: p->minbl = 0;
1.63 schwarze 367: if (0 < p->skipvsp)
368: p->skipvsp--;
369: else
370: (*p->endline)(p);
1.1 kristaps 371: }
372:
1.98 schwarze 373: /* Swap current and previous font; for \fP and .ft P */
1.20 schwarze 374: void
375: term_fontlast(struct termp *p)
376: {
377: enum termfont f;
1.11 schwarze 378:
1.20 schwarze 379: f = p->fontl;
380: p->fontl = p->fontq[p->fonti];
381: p->fontq[p->fonti] = f;
382: }
383:
1.98 schwarze 384: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.20 schwarze 385: void
386: term_fontrepl(struct termp *p, enum termfont f)
387: {
388:
389: p->fontl = p->fontq[p->fonti];
390: p->fontq[p->fonti] = f;
1.1 kristaps 391: }
392:
1.98 schwarze 393: /* Set font, save previous. */
1.20 schwarze 394: void
395: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 396: {
1.7 schwarze 397:
1.20 schwarze 398: p->fontl = p->fontq[p->fonti];
1.98 schwarze 399: if (++p->fonti == p->fontsz) {
400: p->fontsz += 8;
401: p->fontq = mandoc_reallocarray(p->fontq,
1.116 schwarze 402: p->fontsz, sizeof(*p->fontq));
1.98 schwarze 403: }
404: p->fontq[p->fonti] = f;
1.20 schwarze 405: }
1.1 kristaps 406:
1.98 schwarze 407: /* Flush to make the saved pointer current again. */
1.20 schwarze 408: void
1.104 schwarze 409: term_fontpopq(struct termp *p, int i)
1.20 schwarze 410: {
1.1 kristaps 411:
1.104 schwarze 412: assert(i >= 0);
413: if (p->fonti > i)
414: p->fonti = i;
1.20 schwarze 415: }
1.1 kristaps 416:
1.98 schwarze 417: /* Pop one font off the stack. */
1.20 schwarze 418: void
419: term_fontpop(struct termp *p)
420: {
1.1 kristaps 421:
1.20 schwarze 422: assert(p->fonti);
423: p->fonti--;
1.1 kristaps 424: }
425:
426: /*
427: * Handle pwords, partial words, which may be either a single word or a
428: * phrase that cannot be broken down (such as a literal string). This
429: * handles word styling.
430: */
1.7 schwarze 431: void
432: term_word(struct termp *p, const char *word)
1.1 kristaps 433: {
1.121 schwarze 434: struct roffsu su;
1.75 schwarze 435: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.59 schwarze 436: const char *seq, *cp;
437: int sz, uc;
1.122 schwarze 438: size_t csz, lsz, ssz;
1.59 schwarze 439: enum mandoc_esc esc;
1.1 kristaps 440:
1.124 schwarze 441: if ((p->flags & TERMP_NOBUF) == 0) {
442: if ((p->flags & TERMP_NOSPACE) == 0) {
443: if ((p->flags & TERMP_KEEP) == 0) {
1.40 schwarze 444: bufferc(p, ' ');
1.124 schwarze 445: if (p->flags & TERMP_SENTENCE)
446: bufferc(p, ' ');
447: } else
448: bufferc(p, ASCII_NBRSP);
449: }
450: if (p->flags & TERMP_PREKEEP)
451: p->flags |= TERMP_KEEP;
452: if (p->flags & TERMP_NONOSPACE)
453: p->flags |= TERMP_NOSPACE;
454: else
455: p->flags &= ~TERMP_NOSPACE;
456: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
457: p->skipvsp = 0;
1.31 schwarze 458: }
459:
1.59 schwarze 460: while ('\0' != *word) {
1.64 schwarze 461: if ('\\' != *word) {
1.75 schwarze 462: if (TERMP_NBRWORD & p->flags) {
463: if (' ' == *word) {
464: encode(p, nbrsp, 1);
465: word++;
466: continue;
467: }
468: ssz = strcspn(word, "\\ ");
469: } else
470: ssz = strcspn(word, "\\");
1.45 schwarze 471: encode(p, word, ssz);
1.64 schwarze 472: word += (int)ssz;
1.20 schwarze 473: continue;
1.64 schwarze 474: }
1.20 schwarze 475:
1.59 schwarze 476: word++;
477: esc = mandoc_escape(&word, &seq, &sz);
478: if (ESCAPE_ERROR == esc)
1.85 schwarze 479: continue;
1.59 schwarze 480:
481: switch (esc) {
1.83 schwarze 482: case ESCAPE_UNICODE:
1.89 schwarze 483: uc = mchars_num2uc(seq + 1, sz - 1);
1.56 schwarze 484: break;
1.83 schwarze 485: case ESCAPE_NUMBERED:
1.93 schwarze 486: uc = mchars_num2char(seq, sz);
487: if (uc < 0)
488: continue;
1.20 schwarze 489: break;
1.83 schwarze 490: case ESCAPE_SPECIAL:
1.89 schwarze 491: if (p->enc == TERMENC_ASCII) {
1.114 schwarze 492: cp = mchars_spec2str(seq, sz, &ssz);
1.92 schwarze 493: if (cp != NULL)
1.89 schwarze 494: encode(p, cp, ssz);
495: } else {
1.114 schwarze 496: uc = mchars_spec2cp(seq, sz);
1.90 schwarze 497: if (uc > 0)
498: encode1(p, uc);
1.89 schwarze 499: }
1.93 schwarze 500: continue;
1.83 schwarze 501: case ESCAPE_FONTBOLD:
1.20 schwarze 502: term_fontrepl(p, TERMFONT_BOLD);
1.93 schwarze 503: continue;
1.83 schwarze 504: case ESCAPE_FONTITALIC:
1.20 schwarze 505: term_fontrepl(p, TERMFONT_UNDER);
1.93 schwarze 506: continue;
1.83 schwarze 507: case ESCAPE_FONTBI:
1.70 schwarze 508: term_fontrepl(p, TERMFONT_BI);
1.93 schwarze 509: continue;
1.83 schwarze 510: case ESCAPE_FONT:
511: case ESCAPE_FONTROMAN:
1.20 schwarze 512: term_fontrepl(p, TERMFONT_NONE);
1.93 schwarze 513: continue;
1.83 schwarze 514: case ESCAPE_FONTPREV:
1.20 schwarze 515: term_fontlast(p);
1.130 ! schwarze 516: continue;
! 517: case ESCAPE_BREAK:
! 518: bufferc(p, '\n');
1.93 schwarze 519: continue;
1.83 schwarze 520: case ESCAPE_NOSPACE:
1.108 schwarze 521: if (p->flags & TERMP_BACKAFTER)
522: p->flags &= ~TERMP_BACKAFTER;
523: else if (*word == '\0')
1.97 schwarze 524: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.121 schwarze 525: continue;
526: case ESCAPE_HORIZ:
1.128 schwarze 527: if (a2roffsu(seq, &su, SCALE_EM) == NULL)
1.121 schwarze 528: continue;
529: uc = term_hspan(p, &su) / 24;
530: if (uc > 0)
531: while (uc-- > 0)
532: bufferc(p, ASCII_NBRSP);
533: else if (p->col > (size_t)(-uc))
534: p->col += uc;
535: else {
536: uc += p->col;
537: p->col = 0;
1.126 schwarze 538: if (p->tcol->offset > (size_t)(-uc)) {
1.121 schwarze 539: p->ti += uc;
1.126 schwarze 540: p->tcol->offset += uc;
1.121 schwarze 541: } else {
1.126 schwarze 542: p->ti -= p->tcol->offset;
543: p->tcol->offset = 0;
1.121 schwarze 544: }
1.122 schwarze 545: }
546: continue;
547: case ESCAPE_HLINE:
1.128 schwarze 548: if ((seq = a2roffsu(seq, &su, SCALE_EM)) == NULL)
1.122 schwarze 549: continue;
550: uc = term_hspan(p, &su) / 24;
551: if (uc <= 0) {
1.126 schwarze 552: if (p->tcol->rmargin <= p->tcol->offset)
1.122 schwarze 553: continue;
1.126 schwarze 554: lsz = p->tcol->rmargin - p->tcol->offset;
1.122 schwarze 555: } else
556: lsz = uc;
1.128 schwarze 557: if (*seq == '\0')
1.122 schwarze 558: uc = -1;
559: else if (*seq == '\\') {
560: seq++;
561: esc = mandoc_escape(&seq, &cp, &sz);
562: switch (esc) {
563: case ESCAPE_UNICODE:
564: uc = mchars_num2uc(cp + 1, sz - 1);
565: break;
566: case ESCAPE_NUMBERED:
567: uc = mchars_num2char(cp, sz);
568: break;
569: case ESCAPE_SPECIAL:
570: uc = mchars_spec2cp(cp, sz);
571: break;
572: default:
573: uc = -1;
574: break;
575: }
576: } else
577: uc = *seq;
578: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
579: uc = '_';
580: if (p->enc == TERMENC_ASCII) {
581: cp = ascii_uc2str(uc);
582: csz = term_strlen(p, cp);
583: ssz = strlen(cp);
584: } else
585: csz = (*p->width)(p, uc);
586: while (lsz >= csz) {
587: if (p->enc == TERMENC_ASCII)
588: encode(p, cp, ssz);
589: else
590: encode1(p, uc);
591: lsz -= csz;
1.121 schwarze 592: }
1.93 schwarze 593: continue;
1.83 schwarze 594: case ESCAPE_SKIPCHAR:
1.108 schwarze 595: p->flags |= TERMP_BACKAFTER;
1.93 schwarze 596: continue;
1.103 schwarze 597: case ESCAPE_OVERSTRIKE:
598: cp = seq + sz;
599: while (seq < cp) {
600: if (*seq == '\\') {
601: mandoc_escape(&seq, NULL, NULL);
602: continue;
603: }
604: encode1(p, *seq++);
1.108 schwarze 605: if (seq < cp) {
606: if (p->flags & TERMP_BACKBEFORE)
607: p->flags |= TERMP_BACKAFTER;
608: else
609: p->flags |= TERMP_BACKBEFORE;
610: }
1.103 schwarze 611: }
1.109 schwarze 612: /* Trim trailing backspace/blank pair. */
1.129 schwarze 613: if (p->tcol->lastcol > 2 &&
614: (p->tcol->buf[p->tcol->lastcol - 1] == ' ' ||
615: p->tcol->buf[p->tcol->lastcol - 1] == '\t'))
616: p->tcol->lastcol -= 2;
617: if (p->col > p->tcol->lastcol)
618: p->col = p->tcol->lastcol;
1.108 schwarze 619: continue;
1.20 schwarze 620: default:
1.93 schwarze 621: continue;
622: }
623:
624: /*
625: * Common handling for Unicode and numbered
626: * character escape sequences.
627: */
628:
629: if (p->enc == TERMENC_ASCII) {
630: cp = ascii_uc2str(uc);
631: encode(p, cp, strlen(cp));
632: } else {
633: if ((uc < 0x20 && uc != 0x09) ||
634: (uc > 0x7E && uc < 0xA0))
635: uc = 0xFFFD;
636: encode1(p, uc);
1.20 schwarze 637: }
638: }
1.75 schwarze 639: p->flags &= ~TERMP_NBRWORD;
1.1 kristaps 640: }
641:
642: static void
1.126 schwarze 643: adjbuf(struct termp_col *c, size_t sz)
1.1 kristaps 644: {
1.126 schwarze 645: if (c->maxcols == 0)
646: c->maxcols = 1024;
647: while (c->maxcols <= sz)
648: c->maxcols <<= 2;
649: c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
1.1 kristaps 650: }
651:
1.4 schwarze 652: static void
1.20 schwarze 653: bufferc(struct termp *p, char c)
654: {
1.124 schwarze 655: if (p->flags & TERMP_NOBUF) {
656: (*p->letter)(p, c);
657: return;
658: }
1.126 schwarze 659: if (p->col + 1 >= p->tcol->maxcols)
660: adjbuf(p->tcol, p->col + 1);
1.129 schwarze 661: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.126 schwarze 662: p->tcol->buf[p->col] = c;
1.129 schwarze 663: if (p->tcol->lastcol < ++p->col)
664: p->tcol->lastcol = p->col;
1.20 schwarze 665: }
666:
1.59 schwarze 667: /*
668: * See encode().
669: * Do this for a single (probably unicode) value.
670: * Does not check for non-decorated glyphs.
671: */
672: static void
673: encode1(struct termp *p, int c)
674: {
675: enum termfont f;
676:
1.124 schwarze 677: if (p->flags & TERMP_NOBUF) {
678: (*p->letter)(p, c);
679: return;
680: }
681:
1.126 schwarze 682: if (p->col + 7 >= p->tcol->maxcols)
683: adjbuf(p->tcol, p->col + 7);
1.59 schwarze 684:
1.115 schwarze 685: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.108 schwarze 686: p->fontq[p->fonti] : TERMFONT_NONE;
1.59 schwarze 687:
1.108 schwarze 688: if (p->flags & TERMP_BACKBEFORE) {
1.126 schwarze 689: if (p->tcol->buf[p->col - 1] == ' ' ||
690: p->tcol->buf[p->col - 1] == '\t')
1.109 schwarze 691: p->col--;
692: else
1.126 schwarze 693: p->tcol->buf[p->col++] = '\b';
1.108 schwarze 694: p->flags &= ~TERMP_BACKBEFORE;
695: }
1.126 schwarze 696: if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
697: p->tcol->buf[p->col++] = '_';
698: p->tcol->buf[p->col++] = '\b';
699: }
700: if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
701: if (c == ASCII_HYPH)
702: p->tcol->buf[p->col++] = '-';
1.70 schwarze 703: else
1.126 schwarze 704: p->tcol->buf[p->col++] = c;
705: p->tcol->buf[p->col++] = '\b';
1.70 schwarze 706: }
1.129 schwarze 707: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.126 schwarze 708: p->tcol->buf[p->col] = c;
1.129 schwarze 709: if (p->tcol->lastcol < ++p->col)
710: p->tcol->lastcol = p->col;
1.108 schwarze 711: if (p->flags & TERMP_BACKAFTER) {
712: p->flags |= TERMP_BACKBEFORE;
713: p->flags &= ~TERMP_BACKAFTER;
714: }
1.59 schwarze 715: }
1.20 schwarze 716:
717: static void
718: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 719: {
1.71 schwarze 720: size_t i;
1.124 schwarze 721:
722: if (p->flags & TERMP_NOBUF) {
723: for (i = 0; i < sz; i++)
724: (*p->letter)(p, word[i]);
725: return;
726: }
1.59 schwarze 727:
1.126 schwarze 728: if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
729: adjbuf(p->tcol, p->col + 2 + (sz * 5));
1.46 schwarze 730:
1.71 schwarze 731: for (i = 0; i < sz; i++) {
1.70 schwarze 732: if (ASCII_HYPH == word[i] ||
733: isgraph((unsigned char)word[i]))
734: encode1(p, word[i]);
1.119 schwarze 735: else {
1.129 schwarze 736: if (p->tcol->lastcol <= p->col ||
1.125 schwarze 737: (word[i] != ' ' && word[i] != ASCII_NBRSP))
1.126 schwarze 738: p->tcol->buf[p->col] = word[i];
1.125 schwarze 739: p->col++;
1.119 schwarze 740:
741: /*
742: * Postpone the effect of \z while handling
743: * an overstrike sequence from ascii_uc2str().
744: */
745:
746: if (word[i] == '\b' &&
747: (p->flags & TERMP_BACKBEFORE)) {
748: p->flags &= ~TERMP_BACKBEFORE;
749: p->flags |= TERMP_BACKAFTER;
750: }
751: }
1.4 schwarze 752: }
1.129 schwarze 753: if (p->tcol->lastcol < p->col)
754: p->tcol->lastcol = p->col;
1.80 schwarze 755: }
756:
757: void
758: term_setwidth(struct termp *p, const char *wstr)
759: {
760: struct roffsu su;
1.107 schwarze 761: int iop, width;
1.80 schwarze 762:
1.81 schwarze 763: iop = 0;
764: width = 0;
1.80 schwarze 765: if (NULL != wstr) {
766: switch (*wstr) {
1.83 schwarze 767: case '+':
1.80 schwarze 768: iop = 1;
769: wstr++;
770: break;
1.83 schwarze 771: case '-':
1.80 schwarze 772: iop = -1;
773: wstr++;
774: break;
775: default:
776: break;
777: }
1.128 schwarze 778: if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
1.81 schwarze 779: width = term_hspan(p, &su);
780: else
1.80 schwarze 781: iop = 0;
782: }
783: (*p->setwidth)(p, iop, width);
1.4 schwarze 784: }
1.16 schwarze 785:
786: size_t
1.39 schwarze 787: term_len(const struct termp *p, size_t sz)
788: {
789:
1.112 schwarze 790: return (*p->width)(p, ' ') * sz;
1.39 schwarze 791: }
792:
1.64 schwarze 793: static size_t
794: cond_width(const struct termp *p, int c, int *skip)
795: {
796:
797: if (*skip) {
798: (*skip) = 0;
1.112 schwarze 799: return 0;
1.64 schwarze 800: } else
1.112 schwarze 801: return (*p->width)(p, c);
1.64 schwarze 802: }
1.39 schwarze 803:
804: size_t
805: term_strlen(const struct termp *p, const char *cp)
806: {
1.59 schwarze 807: size_t sz, rsz, i;
1.93 schwarze 808: int ssz, skip, uc;
1.50 schwarze 809: const char *seq, *rhs;
1.59 schwarze 810: enum mandoc_esc esc;
1.77 schwarze 811: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
812: ASCII_BREAK, '\0' };
1.59 schwarze 813:
814: /*
815: * Account for escaped sequences within string length
816: * calculations. This follows the logic in term_word() as we
817: * must calculate the width of produced strings.
818: */
819:
820: sz = 0;
1.64 schwarze 821: skip = 0;
1.59 schwarze 822: while ('\0' != *cp) {
823: rsz = strcspn(cp, rej);
824: for (i = 0; i < rsz; i++)
1.64 schwarze 825: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 826:
827: switch (*cp) {
1.83 schwarze 828: case '\\':
1.59 schwarze 829: cp++;
830: esc = mandoc_escape(&cp, &seq, &ssz);
831: if (ESCAPE_ERROR == esc)
1.85 schwarze 832: continue;
1.59 schwarze 833:
834: rhs = NULL;
1.50 schwarze 835:
1.59 schwarze 836: switch (esc) {
1.83 schwarze 837: case ESCAPE_UNICODE:
1.94 schwarze 838: uc = mchars_num2uc(seq + 1, ssz - 1);
1.59 schwarze 839: break;
1.83 schwarze 840: case ESCAPE_NUMBERED:
1.93 schwarze 841: uc = mchars_num2char(seq, ssz);
842: if (uc < 0)
843: continue;
1.50 schwarze 844: break;
1.83 schwarze 845: case ESCAPE_SPECIAL:
1.93 schwarze 846: if (p->enc == TERMENC_ASCII) {
1.114 schwarze 847: rhs = mchars_spec2str(seq, ssz, &rsz);
1.93 schwarze 848: if (rhs != NULL)
849: break;
850: } else {
1.114 schwarze 851: uc = mchars_spec2cp(seq, ssz);
1.93 schwarze 852: if (uc > 0)
853: sz += cond_width(p, uc, &skip);
1.89 schwarze 854: }
1.93 schwarze 855: continue;
1.83 schwarze 856: case ESCAPE_SKIPCHAR:
1.64 schwarze 857: skip = 1;
1.103 schwarze 858: continue;
859: case ESCAPE_OVERSTRIKE:
860: rsz = 0;
861: rhs = seq + ssz;
862: while (seq < rhs) {
863: if (*seq == '\\') {
864: mandoc_escape(&seq, NULL, NULL);
865: continue;
866: }
867: i = (*p->width)(p, *seq++);
868: if (rsz < i)
869: rsz = i;
870: }
871: sz += rsz;
1.93 schwarze 872: continue;
1.50 schwarze 873: default:
1.93 schwarze 874: continue;
1.50 schwarze 875: }
1.39 schwarze 876:
1.93 schwarze 877: /*
878: * Common handling for Unicode and numbered
879: * character escape sequences.
880: */
881:
882: if (rhs == NULL) {
883: if (p->enc == TERMENC_ASCII) {
884: rhs = ascii_uc2str(uc);
885: rsz = strlen(rhs);
886: } else {
887: if ((uc < 0x20 && uc != 0x09) ||
888: (uc > 0x7E && uc < 0xA0))
889: uc = 0xFFFD;
890: sz += cond_width(p, uc, &skip);
891: continue;
892: }
893: }
1.59 schwarze 894:
1.64 schwarze 895: if (skip) {
896: skip = 0;
897: break;
898: }
1.93 schwarze 899:
900: /*
901: * Common handling for all escape sequences
902: * printing more than one character.
903: */
1.64 schwarze 904:
1.59 schwarze 905: for (i = 0; i < rsz; i++)
906: sz += (*p->width)(p, *rhs++);
907: break;
1.83 schwarze 908: case ASCII_NBRSP:
1.64 schwarze 909: sz += cond_width(p, ' ', &skip);
1.55 schwarze 910: cp++;
1.59 schwarze 911: break;
1.83 schwarze 912: case ASCII_HYPH:
1.64 schwarze 913: sz += cond_width(p, '-', &skip);
1.55 schwarze 914: cp++;
1.59 schwarze 915: break;
916: default:
917: break;
918: }
919: }
1.39 schwarze 920:
1.112 schwarze 921: return sz;
1.39 schwarze 922: }
923:
1.100 schwarze 924: int
1.39 schwarze 925: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 926: {
927: double r;
1.101 schwarze 928: int ri;
1.16 schwarze 929:
930: switch (su->unit) {
1.99 schwarze 931: case SCALE_BU:
932: r = su->scale / 40.0;
933: break;
1.83 schwarze 934: case SCALE_CM:
1.99 schwarze 935: r = su->scale * 6.0 / 2.54;
936: break;
937: case SCALE_FS:
938: r = su->scale * 65536.0 / 40.0;
1.16 schwarze 939: break;
1.83 schwarze 940: case SCALE_IN:
1.86 schwarze 941: r = su->scale * 6.0;
1.16 schwarze 942: break;
1.99 schwarze 943: case SCALE_MM:
944: r = su->scale * 0.006;
945: break;
1.83 schwarze 946: case SCALE_PC:
1.16 schwarze 947: r = su->scale;
948: break;
1.83 schwarze 949: case SCALE_PT:
1.99 schwarze 950: r = su->scale / 12.0;
1.16 schwarze 951: break;
1.99 schwarze 952: case SCALE_EN:
953: case SCALE_EM:
954: r = su->scale * 0.6;
1.16 schwarze 955: break;
1.83 schwarze 956: case SCALE_VS:
1.16 schwarze 957: r = su->scale;
958: break;
959: default:
1.99 schwarze 960: abort();
1.16 schwarze 961: }
1.101 schwarze 962: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.112 schwarze 963: return ri < 66 ? ri : 1;
1.16 schwarze 964: }
965:
1.107 schwarze 966: /*
967: * Convert a scaling width to basic units, rounding down.
968: */
1.100 schwarze 969: int
1.39 schwarze 970: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 971: {
972:
1.112 schwarze 973: return (*p->hspan)(p, su);
1.16 schwarze 974: }
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