Annotation of mandoc/term.c, Revision 1.267
1.267 ! schwarze 1: /* $Id: term.c,v 1.266 2017/06/07 17:38:26 schwarze Exp $ */
1.1 kristaps 2: /*
1.198 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.259 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
1.74 kristaps 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: *
1.246 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.74 kristaps 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.246 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.74 kristaps 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: */
1.128 kristaps 18: #include "config.h"
19:
1.126 kristaps 20: #include <sys/types.h>
21:
1.1 kristaps 22: #include <assert.h>
1.122 kristaps 23: #include <ctype.h>
1.22 kristaps 24: #include <stdio.h>
1.1 kristaps 25: #include <stdlib.h>
26: #include <string.h>
27:
1.137 kristaps 28: #include "mandoc.h"
1.218 schwarze 29: #include "mandoc_aux.h"
1.107 kristaps 30: #include "out.h"
1.71 kristaps 31: #include "term.h"
1.105 kristaps 32: #include "main.h"
1.1 kristaps 33:
1.203 schwarze 34: static size_t cond_width(const struct termp *, int, int *);
1.266 schwarze 35: static void adjbuf(struct termp_col *, size_t);
1.191 kristaps 36: static void bufferc(struct termp *, char);
37: static void encode(struct termp *, const char *, size_t);
1.194 kristaps 38: static void encode1(struct termp *, int);
1.264 schwarze 39: static void endline(struct termp *);
1.11 kristaps 40:
1.222 schwarze 41:
1.145 kristaps 42: void
1.71 kristaps 43: term_free(struct termp *p)
1.14 kristaps 44: {
1.266 schwarze 45: for (p->tcol = p->tcols; p->tcol < p->tcols + p->maxtcol; p->tcol++)
46: free(p->tcol->buf);
47: free(p->tcols);
1.238 schwarze 48: free(p->fontq);
1.142 kristaps 49: free(p);
50: }
51:
52: void
1.222 schwarze 53: term_begin(struct termp *p, term_margin head,
1.246 schwarze 54: term_margin foot, const struct roff_meta *arg)
1.142 kristaps 55: {
56:
57: p->headf = head;
58: p->footf = foot;
59: p->argf = arg;
1.146 kristaps 60: (*p->begin)(p);
1.142 kristaps 61: }
62:
63: void
64: term_end(struct termp *p)
65: {
66:
1.146 kristaps 67: (*p->end)(p);
1.14 kristaps 68: }
69:
1.71 kristaps 70: /*
1.221 schwarze 71: * Flush a chunk of text. By default, break the output line each time
72: * the right margin is reached, and continue output on the next line
73: * at the same offset as the chunk itself. By default, also break the
74: * output line at the end of the chunk.
1.130 kristaps 75: * The following flags may be specified:
1.71 kristaps 76: *
1.221 schwarze 77: * - TERMP_NOBREAK: Do not break the output line at the right margin,
78: * but only at the max right margin. Also, do not break the output
79: * line at the end of the chunk, such that the next call can pad to
80: * the next column. However, if less than p->trailspace blanks,
81: * which can be 0, 1, or 2, remain to the right margin, the line
82: * will be broken.
1.250 schwarze 83: * - TERMP_BRTRSP: Consider trailing whitespace significant
84: * when deciding whether the chunk fits or not.
1.221 schwarze 85: * - TERMP_BRIND: If the chunk does not fit and the output line has
86: * to be broken, start the next line at the right margin instead
87: * of at the offset. Used together with TERMP_NOBREAK for the tags
88: * in various kinds of tagged lists.
1.263 schwarze 89: * - TERMP_HANG: Do not break the output line at the right margin,
1.221 schwarze 90: * append the next chunk after it even if this one is too long.
91: * To be used together with TERMP_NOBREAK.
1.263 schwarze 92: * - TERMP_NOPAD: Start writing at the current position,
93: * do not pad with blank characters up to the offset.
1.71 kristaps 94: */
95: void
96: term_flushln(struct termp *p)
1.53 kristaps 97: {
1.114 kristaps 98: size_t vis; /* current visual position on output */
99: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 100: size_t vend; /* end of word visual position on output */
1.114 kristaps 101: size_t bp; /* visual right border position */
1.172 schwarze 102: size_t dv; /* temporary for visual pos calculations */
1.266 schwarze 103: size_t j; /* temporary loop index for p->tcol->buf */
1.210 schwarze 104: size_t jhy; /* last hyph before overflow w/r/t j */
1.152 kristaps 105: size_t maxvis; /* output position of visible boundary */
1.266 schwarze 106: int ntab; /* number of tabs to prepend */
1.53 kristaps 107:
1.266 schwarze 108: vbl = (p->flags & TERMP_NOPAD) || p->tcol->offset < p->viscol ?
109: 0 : p->tcol->offset - p->viscol;
1.263 schwarze 110: if (p->minbl && vbl < p->minbl)
111: vbl = p->minbl;
1.266 schwarze 112: maxvis = p->tcol->rmargin > p->viscol + vbl ?
113: p->tcol->rmargin - p->viscol - vbl : 0;
1.263 schwarze 114: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
115: p->maxrmargin > p->viscol + vbl ?
116: p->maxrmargin - p->viscol - vbl : 0;
1.174 schwarze 117: vis = vend = 0;
1.115 kristaps 118:
1.267 ! schwarze 119: if (p->lasttcol == 0)
! 120: p->tcol->col = 0;
! 121: while (p->tcol->col < p->lastcol) {
! 122:
1.71 kristaps 123: /*
1.154 kristaps 124: * Handle literal tab characters: collapse all
125: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 126: */
1.267 ! schwarze 127:
1.205 schwarze 128: ntab = 0;
1.267 ! schwarze 129: while (p->tcol->col < p->lastcol &&
! 130: p->tcol->buf[p->tcol->col] == '\t') {
1.260 schwarze 131: vend = term_tab_next(vis);
1.138 schwarze 132: vbl += vend - vis;
133: vis = vend;
1.205 schwarze 134: ntab++;
1.267 ! schwarze 135: p->tcol->col++;
1.138 schwarze 136: }
137:
138: /*
1.71 kristaps 139: * Count up visible word characters. Control sequences
140: * (starting with the CSI) aren't counted. A space
141: * generates a non-printing word, which is valid (the
142: * space is printed according to regular spacing rules).
143: */
144:
1.267 ! schwarze 145: jhy = 0;
! 146: for (j = p->tcol->col; j < p->lastcol; j++) {
1.266 schwarze 147: if (p->tcol->buf[j] == ' ' || p->tcol->buf[j] == '\t')
1.71 kristaps 148: break;
1.154 kristaps 149:
1.257 schwarze 150: /* Back over the last printed character. */
1.266 schwarze 151: if (p->tcol->buf[j] == '\b') {
1.153 kristaps 152: assert(j);
1.266 schwarze 153: vend -= (*p->width)(p, p->tcol->buf[j - 1]);
1.154 kristaps 154: continue;
1.153 kristaps 155: }
1.154 kristaps 156:
157: /* Regular word. */
158: /* Break at the hyphen point if we overrun. */
1.222 schwarze 159: if (vend > vis && vend < bp &&
1.266 schwarze 160: (p->tcol->buf[j] == ASCII_HYPH||
161: p->tcol->buf[j] == ASCII_BREAK))
1.154 kristaps 162: jhy = j;
163:
1.217 schwarze 164: /*
165: * Hyphenation now decided, put back a real
166: * hyphen such that we get the correct width.
167: */
1.266 schwarze 168: if (p->tcol->buf[j] == ASCII_HYPH)
169: p->tcol->buf[j] = '-';
1.217 schwarze 170:
1.266 schwarze 171: vend += (*p->width)(p, p->tcol->buf[j]);
1.71 kristaps 172: }
1.53 kristaps 173:
1.71 kristaps 174: /*
1.81 kristaps 175: * Find out whether we would exceed the right margin.
1.136 schwarze 176: * If so, break to the next line.
1.81 kristaps 177: */
1.267 ! schwarze 178:
! 179: if (vend > bp && jhy == 0 && vis > 0 &&
1.264 schwarze 180: (p->flags & TERMP_BRNEVER) == 0) {
1.267 ! schwarze 181: if (p->lasttcol)
! 182: return;
! 183:
! 184: endline(p);
1.136 schwarze 185: vend -= vis;
1.205 schwarze 186:
1.260 schwarze 187: /* Use pending tabs on the new line. */
188:
189: vbl = 0;
190: while (ntab--)
191: vbl = term_tab_next(vbl);
192:
193: /* Re-establish indentation. */
1.205 schwarze 194:
1.263 schwarze 195: if (p->flags & TERMP_BRIND)
1.266 schwarze 196: vbl += p->tcol->rmargin;
1.263 schwarze 197: else
1.266 schwarze 198: vbl += p->tcol->offset;
199: maxvis = p->tcol->rmargin > vbl ?
200: p->tcol->rmargin - vbl : 0;
1.263 schwarze 201: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
202: p->maxrmargin > vbl ? p->maxrmargin - vbl : 0;
1.71 kristaps 203: }
1.138 schwarze 204:
1.267 ! schwarze 205: /*
! 206: * Write out the rest of the word.
! 207: */
! 208:
! 209: for ( ; p->tcol->col < p->lastcol; p->tcol->col++) {
! 210: if (vend > bp && jhy > 0 && p->tcol->col > jhy)
1.140 kristaps 211: break;
1.267 ! schwarze 212: if (p->tcol->buf[p->tcol->col] == '\t')
1.138 schwarze 213: break;
1.267 ! schwarze 214: if (p->tcol->buf[p->tcol->col] == ' ') {
! 215: j = p->tcol->col;
! 216: while (p->tcol->col < p->lastcol &&
! 217: p->tcol->buf[p->tcol->col] == ' ')
! 218: p->tcol->col++;
! 219: dv = (p->tcol->col - j) * (*p->width)(p, ' ');
1.172 schwarze 220: vbl += dv;
221: vend += dv;
1.71 kristaps 222: break;
1.136 schwarze 223: }
1.267 ! schwarze 224: if (p->tcol->buf[p->tcol->col] == ASCII_NBRSP) {
1.153 kristaps 225: vbl += (*p->width)(p, ' ');
1.136 schwarze 226: continue;
227: }
1.267 ! schwarze 228: if (p->tcol->buf[p->tcol->col] == ASCII_BREAK)
1.216 schwarze 229: continue;
1.130 kristaps 230:
1.136 schwarze 231: /*
232: * Now we definitely know there will be
233: * printable characters to output,
234: * so write preceding white space now.
235: */
236: if (vbl) {
1.146 kristaps 237: (*p->advance)(p, vbl);
1.139 schwarze 238: p->viscol += vbl;
1.136 schwarze 239: vbl = 0;
1.200 schwarze 240: }
241:
1.267 ! schwarze 242: (*p->letter)(p, p->tcol->buf[p->tcol->col]);
! 243: if (p->tcol->buf[p->tcol->col] == '\b')
! 244: p->viscol -= (*p->width)(p,
! 245: p->tcol->buf[p->tcol->col - 1]);
1.222 schwarze 246: else
1.267 ! schwarze 247: p->viscol += (*p->width)(p,
! 248: p->tcol->buf[p->tcol->col]);
1.136 schwarze 249: }
250: vis = vend;
1.71 kristaps 251: }
1.168 schwarze 252:
253: /*
254: * If there was trailing white space, it was not printed;
255: * so reset the cursor position accordingly.
256: */
1.267 ! schwarze 257:
1.235 schwarze 258: if (vis > vbl)
1.200 schwarze 259: vis -= vbl;
1.235 schwarze 260: else
261: vis = 0;
1.111 kristaps 262:
1.265 schwarze 263: p->col = p->lastcol = 0;
1.264 schwarze 264: p->minbl = p->trailspace;
1.263 schwarze 265: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD);
1.15 kristaps 266:
1.250 schwarze 267: /* Trailing whitespace is significant in some columns. */
1.267 ! schwarze 268:
1.250 schwarze 269: if (vis && vbl && (TERMP_BRTRSP & p->flags))
270: vis += vbl;
1.15 kristaps 271:
1.200 schwarze 272: /* If the column was overrun, break the line. */
1.264 schwarze 273: if ((p->flags & TERMP_NOBREAK) == 0 ||
274: ((p->flags & TERMP_HANG) == 0 &&
275: vis + p->trailspace * (*p->width)(p, ' ') > maxvis))
276: endline(p);
277: }
278:
279: static void
280: endline(struct termp *p)
281: {
282: if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) {
283: p->mc = NULL;
284: p->flags &= ~TERMP_ENDMC;
285: }
286: if (p->mc != NULL) {
287: if (p->viscol && p->maxrmargin >= p->viscol)
288: (*p->advance)(p, p->maxrmargin - p->viscol + 1);
289: p->flags |= TERMP_NOBUF | TERMP_NOSPACE;
290: term_word(p, p->mc);
291: p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC);
292: }
293: p->viscol = 0;
294: p->minbl = 0;
295: (*p->endline)(p);
1.15 kristaps 296: }
297:
1.222 schwarze 298: /*
1.71 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)
1.15 kristaps 305: {
306:
1.71 kristaps 307: p->flags |= TERMP_NOSPACE;
1.265 schwarze 308: if (p->lastcol || p->viscol)
1.200 schwarze 309: term_flushln(p);
1.16 kristaps 310: }
311:
1.71 kristaps 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)
1.16 kristaps 320: {
321:
1.62 kristaps 322: term_newln(p);
1.139 schwarze 323: p->viscol = 0;
1.264 schwarze 324: p->minbl = 0;
1.202 schwarze 325: if (0 < p->skipvsp)
326: p->skipvsp--;
327: else
328: (*p->endline)(p);
1.16 kristaps 329: }
330:
1.238 schwarze 331: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 332: void
333: term_fontlast(struct termp *p)
334: {
335: enum termfont f;
336:
337: f = p->fontl;
338: p->fontl = p->fontq[p->fonti];
339: p->fontq[p->fonti] = f;
340: }
341:
1.238 schwarze 342: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 343: void
344: term_fontrepl(struct termp *p, enum termfont f)
345: {
346:
347: p->fontl = p->fontq[p->fonti];
348: p->fontq[p->fonti] = f;
349: }
350:
1.238 schwarze 351: /* Set font, save previous. */
1.125 kristaps 352: void
353: term_fontpush(struct termp *p, enum termfont f)
354: {
355:
356: p->fontl = p->fontq[p->fonti];
1.238 schwarze 357: if (++p->fonti == p->fontsz) {
358: p->fontsz += 8;
359: p->fontq = mandoc_reallocarray(p->fontq,
1.256 schwarze 360: p->fontsz, sizeof(*p->fontq));
1.238 schwarze 361: }
362: p->fontq[p->fonti] = f;
1.125 kristaps 363: }
364:
1.238 schwarze 365: /* Flush to make the saved pointer current again. */
1.125 kristaps 366: void
1.244 schwarze 367: term_fontpopq(struct termp *p, int i)
1.125 kristaps 368: {
369:
1.244 schwarze 370: assert(i >= 0);
371: if (p->fonti > i)
372: p->fonti = i;
1.125 kristaps 373: }
1.94 kristaps 374:
1.238 schwarze 375: /* Pop one font off the stack. */
1.125 kristaps 376: void
377: term_fontpop(struct termp *p)
378: {
379:
380: assert(p->fonti);
381: p->fonti--;
1.17 kristaps 382: }
383:
1.71 kristaps 384: /*
385: * Handle pwords, partial words, which may be either a single word or a
386: * phrase that cannot be broken down (such as a literal string). This
387: * handles word styling.
388: */
1.86 kristaps 389: void
390: term_word(struct termp *p, const char *word)
1.65 kristaps 391: {
1.261 schwarze 392: struct roffsu su;
1.214 schwarze 393: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 394: const char *seq, *cp;
1.194 kristaps 395: int sz, uc;
1.262 schwarze 396: size_t csz, lsz, ssz;
1.184 kristaps 397: enum mandoc_esc esc;
1.100 kristaps 398:
1.264 schwarze 399: if ((p->flags & TERMP_NOBUF) == 0) {
400: if ((p->flags & TERMP_NOSPACE) == 0) {
401: if ((p->flags & TERMP_KEEP) == 0) {
1.151 schwarze 402: bufferc(p, ' ');
1.264 schwarze 403: if (p->flags & TERMP_SENTENCE)
404: bufferc(p, ' ');
405: } else
406: bufferc(p, ASCII_NBRSP);
407: }
408: if (p->flags & TERMP_PREKEEP)
409: p->flags |= TERMP_KEEP;
410: if (p->flags & TERMP_NONOSPACE)
411: p->flags |= TERMP_NOSPACE;
412: else
413: p->flags &= ~TERMP_NOSPACE;
414: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
415: p->skipvsp = 0;
1.133 kristaps 416: }
1.65 kristaps 417:
1.184 kristaps 418: while ('\0' != *word) {
1.203 schwarze 419: if ('\\' != *word) {
1.214 schwarze 420: if (TERMP_NBRWORD & p->flags) {
421: if (' ' == *word) {
422: encode(p, nbrsp, 1);
423: word++;
424: continue;
425: }
426: ssz = strcspn(word, "\\ ");
427: } else
428: ssz = strcspn(word, "\\");
1.162 kristaps 429: encode(p, word, ssz);
1.203 schwarze 430: word += (int)ssz;
1.124 kristaps 431: continue;
1.203 schwarze 432: }
1.124 kristaps 433:
1.184 kristaps 434: word++;
435: esc = mandoc_escape(&word, &seq, &sz);
436: if (ESCAPE_ERROR == esc)
1.224 schwarze 437: continue;
1.124 kristaps 438:
1.184 kristaps 439: switch (esc) {
1.222 schwarze 440: case ESCAPE_UNICODE:
1.229 schwarze 441: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 442: break;
1.222 schwarze 443: case ESCAPE_NUMBERED:
1.233 schwarze 444: uc = mchars_num2char(seq, sz);
445: if (uc < 0)
446: continue;
1.184 kristaps 447: break;
1.222 schwarze 448: case ESCAPE_SPECIAL:
1.229 schwarze 449: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 450: cp = mchars_spec2str(seq, sz, &ssz);
1.232 schwarze 451: if (cp != NULL)
1.229 schwarze 452: encode(p, cp, ssz);
453: } else {
1.254 schwarze 454: uc = mchars_spec2cp(seq, sz);
1.230 schwarze 455: if (uc > 0)
456: encode1(p, uc);
1.229 schwarze 457: }
1.233 schwarze 458: continue;
1.222 schwarze 459: case ESCAPE_FONTBOLD:
1.125 kristaps 460: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 461: continue;
1.222 schwarze 462: case ESCAPE_FONTITALIC:
1.125 kristaps 463: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 464: continue;
1.222 schwarze 465: case ESCAPE_FONTBI:
1.209 schwarze 466: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 467: continue;
1.222 schwarze 468: case ESCAPE_FONT:
469: case ESCAPE_FONTROMAN:
1.125 kristaps 470: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 471: continue;
1.222 schwarze 472: case ESCAPE_FONTPREV:
1.125 kristaps 473: term_fontlast(p);
1.233 schwarze 474: continue;
1.222 schwarze 475: case ESCAPE_NOSPACE:
1.248 schwarze 476: if (p->flags & TERMP_BACKAFTER)
477: p->flags &= ~TERMP_BACKAFTER;
478: else if (*word == '\0')
1.237 schwarze 479: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.261 schwarze 480: continue;
481: case ESCAPE_HORIZ:
482: if (a2roffsu(seq, &su, SCALE_EM) == 0)
483: continue;
484: uc = term_hspan(p, &su) / 24;
485: if (uc > 0)
486: while (uc-- > 0)
487: bufferc(p, ASCII_NBRSP);
488: else if (p->col > (size_t)(-uc))
489: p->col += uc;
490: else {
491: uc += p->col;
492: p->col = 0;
1.266 schwarze 493: if (p->tcol->offset > (size_t)(-uc)) {
1.261 schwarze 494: p->ti += uc;
1.266 schwarze 495: p->tcol->offset += uc;
1.261 schwarze 496: } else {
1.266 schwarze 497: p->ti -= p->tcol->offset;
498: p->tcol->offset = 0;
1.261 schwarze 499: }
1.262 schwarze 500: }
501: continue;
502: case ESCAPE_HLINE:
503: if (a2roffsu(seq, &su, SCALE_EM) == 0)
504: continue;
505: uc = term_hspan(p, &su) / 24;
506: if (uc <= 0) {
1.266 schwarze 507: if (p->tcol->rmargin <= p->tcol->offset)
1.262 schwarze 508: continue;
1.266 schwarze 509: lsz = p->tcol->rmargin - p->tcol->offset;
1.262 schwarze 510: } else
511: lsz = uc;
512: while (sz &&
513: strchr(" %&()*+-./0123456789:<=>", *seq)) {
514: seq++;
515: sz--;
516: }
517: if (sz && strchr("cifMmnPpuv", *seq)) {
518: seq++;
519: sz--;
520: }
521: if (sz == 0)
522: uc = -1;
523: else if (*seq == '\\') {
524: seq++;
525: esc = mandoc_escape(&seq, &cp, &sz);
526: switch (esc) {
527: case ESCAPE_UNICODE:
528: uc = mchars_num2uc(cp + 1, sz - 1);
529: break;
530: case ESCAPE_NUMBERED:
531: uc = mchars_num2char(cp, sz);
532: break;
533: case ESCAPE_SPECIAL:
534: uc = mchars_spec2cp(cp, sz);
535: break;
536: default:
537: uc = -1;
538: break;
539: }
540: } else
541: uc = *seq;
542: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
543: uc = '_';
544: if (p->enc == TERMENC_ASCII) {
545: cp = ascii_uc2str(uc);
546: csz = term_strlen(p, cp);
547: ssz = strlen(cp);
548: } else
549: csz = (*p->width)(p, uc);
550: while (lsz >= csz) {
551: if (p->enc == TERMENC_ASCII)
552: encode(p, cp, ssz);
553: else
554: encode1(p, uc);
555: lsz -= csz;
1.261 schwarze 556: }
1.233 schwarze 557: continue;
1.222 schwarze 558: case ESCAPE_SKIPCHAR:
1.248 schwarze 559: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 560: continue;
1.243 schwarze 561: case ESCAPE_OVERSTRIKE:
562: cp = seq + sz;
563: while (seq < cp) {
564: if (*seq == '\\') {
565: mandoc_escape(&seq, NULL, NULL);
566: continue;
567: }
568: encode1(p, *seq++);
1.248 schwarze 569: if (seq < cp) {
570: if (p->flags & TERMP_BACKBEFORE)
571: p->flags |= TERMP_BACKAFTER;
572: else
573: p->flags |= TERMP_BACKBEFORE;
574: }
1.243 schwarze 575: }
1.249 schwarze 576: /* Trim trailing backspace/blank pair. */
1.265 schwarze 577: if (p->lastcol > 2 &&
1.266 schwarze 578: (p->tcol->buf[p->lastcol - 1] == ' ' ||
579: p->tcol->buf[p->lastcol - 1] == '\t'))
1.265 schwarze 580: p->lastcol -= 2;
581: if (p->col > p->lastcol)
582: p->col = p->lastcol;
1.248 schwarze 583: continue;
1.124 kristaps 584: default:
1.233 schwarze 585: continue;
586: }
587:
588: /*
589: * Common handling for Unicode and numbered
590: * character escape sequences.
591: */
592:
593: if (p->enc == TERMENC_ASCII) {
594: cp = ascii_uc2str(uc);
595: encode(p, cp, strlen(cp));
596: } else {
597: if ((uc < 0x20 && uc != 0x09) ||
598: (uc > 0x7E && uc < 0xA0))
599: uc = 0xFFFD;
600: encode1(p, uc);
1.124 kristaps 601: }
602: }
1.214 schwarze 603: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 604: }
605:
1.71 kristaps 606: static void
1.266 schwarze 607: adjbuf(struct termp_col *c, size_t sz)
1.51 kristaps 608: {
1.266 schwarze 609: if (c->maxcols == 0)
610: c->maxcols = 1024;
611: while (c->maxcols <= sz)
612: c->maxcols <<= 2;
613: c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
1.51 kristaps 614: }
615:
1.79 kristaps 616: static void
1.125 kristaps 617: bufferc(struct termp *p, char c)
618: {
1.264 schwarze 619: if (p->flags & TERMP_NOBUF) {
620: (*p->letter)(p, c);
621: return;
622: }
1.266 schwarze 623: if (p->col + 1 >= p->tcol->maxcols)
624: adjbuf(p->tcol, p->col + 1);
1.265 schwarze 625: if (p->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 626: p->tcol->buf[p->col] = c;
1.265 schwarze 627: if (p->lastcol < ++p->col)
628: p->lastcol = p->col;
1.125 kristaps 629: }
630:
1.194 kristaps 631: /*
632: * See encode().
633: * Do this for a single (probably unicode) value.
634: * Does not check for non-decorated glyphs.
635: */
636: static void
637: encode1(struct termp *p, int c)
638: {
639: enum termfont f;
640:
1.264 schwarze 641: if (p->flags & TERMP_NOBUF) {
642: (*p->letter)(p, c);
643: return;
644: }
645:
1.266 schwarze 646: if (p->col + 7 >= p->tcol->maxcols)
647: adjbuf(p->tcol, p->col + 7);
1.194 kristaps 648:
1.255 schwarze 649: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 650: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 651:
1.248 schwarze 652: if (p->flags & TERMP_BACKBEFORE) {
1.266 schwarze 653: if (p->tcol->buf[p->col - 1] == ' ' ||
654: p->tcol->buf[p->col - 1] == '\t')
1.249 schwarze 655: p->col--;
656: else
1.266 schwarze 657: p->tcol->buf[p->col++] = '\b';
1.248 schwarze 658: p->flags &= ~TERMP_BACKBEFORE;
659: }
1.266 schwarze 660: if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
661: p->tcol->buf[p->col++] = '_';
662: p->tcol->buf[p->col++] = '\b';
663: }
664: if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
665: if (c == ASCII_HYPH)
666: p->tcol->buf[p->col++] = '-';
1.209 schwarze 667: else
1.266 schwarze 668: p->tcol->buf[p->col++] = c;
669: p->tcol->buf[p->col++] = '\b';
1.209 schwarze 670: }
1.265 schwarze 671: if (p->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 672: p->tcol->buf[p->col] = c;
1.265 schwarze 673: if (p->lastcol < ++p->col)
674: p->lastcol = p->col;
1.248 schwarze 675: if (p->flags & TERMP_BACKAFTER) {
676: p->flags |= TERMP_BACKBEFORE;
677: p->flags &= ~TERMP_BACKAFTER;
678: }
1.194 kristaps 679: }
680:
1.125 kristaps 681: static void
682: encode(struct termp *p, const char *word, size_t sz)
683: {
1.210 schwarze 684: size_t i;
1.264 schwarze 685:
686: if (p->flags & TERMP_NOBUF) {
687: for (i = 0; i < sz; i++)
688: (*p->letter)(p, word[i]);
689: return;
690: }
1.188 kristaps 691:
1.266 schwarze 692: if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
693: adjbuf(p->tcol, p->col + 2 + (sz * 5));
1.165 kristaps 694:
1.210 schwarze 695: for (i = 0; i < sz; i++) {
1.209 schwarze 696: if (ASCII_HYPH == word[i] ||
697: isgraph((unsigned char)word[i]))
698: encode1(p, word[i]);
1.259 schwarze 699: else {
1.265 schwarze 700: if (p->lastcol <= p->col ||
701: (word[i] != ' ' && word[i] != ASCII_NBRSP))
1.266 schwarze 702: p->tcol->buf[p->col] = word[i];
1.265 schwarze 703: p->col++;
1.259 schwarze 704:
705: /*
706: * Postpone the effect of \z while handling
707: * an overstrike sequence from ascii_uc2str().
708: */
709:
710: if (word[i] == '\b' &&
711: (p->flags & TERMP_BACKBEFORE)) {
712: p->flags &= ~TERMP_BACKBEFORE;
713: p->flags |= TERMP_BACKAFTER;
714: }
715: }
1.79 kristaps 716: }
1.265 schwarze 717: if (p->lastcol < p->col)
718: p->lastcol = p->col;
1.219 schwarze 719: }
720:
721: void
722: term_setwidth(struct termp *p, const char *wstr)
723: {
724: struct roffsu su;
1.247 schwarze 725: int iop, width;
1.219 schwarze 726:
1.220 schwarze 727: iop = 0;
728: width = 0;
1.219 schwarze 729: if (NULL != wstr) {
730: switch (*wstr) {
1.222 schwarze 731: case '+':
1.219 schwarze 732: iop = 1;
733: wstr++;
734: break;
1.222 schwarze 735: case '-':
1.219 schwarze 736: iop = -1;
737: wstr++;
738: break;
739: default:
740: break;
741: }
1.220 schwarze 742: if (a2roffsu(wstr, &su, SCALE_MAX))
743: width = term_hspan(p, &su);
744: else
1.219 schwarze 745: iop = 0;
746: }
747: (*p->setwidth)(p, iop, width);
1.79 kristaps 748: }
1.106 kristaps 749:
1.107 kristaps 750: size_t
1.149 kristaps 751: term_len(const struct termp *p, size_t sz)
752: {
753:
1.252 schwarze 754: return (*p->width)(p, ' ') * sz;
1.149 kristaps 755: }
756:
1.203 schwarze 757: static size_t
758: cond_width(const struct termp *p, int c, int *skip)
759: {
760:
761: if (*skip) {
762: (*skip) = 0;
1.252 schwarze 763: return 0;
1.203 schwarze 764: } else
1.252 schwarze 765: return (*p->width)(p, c);
1.203 schwarze 766: }
1.149 kristaps 767:
768: size_t
769: term_strlen(const struct termp *p, const char *cp)
770: {
1.184 kristaps 771: size_t sz, rsz, i;
1.233 schwarze 772: int ssz, skip, uc;
1.171 kristaps 773: const char *seq, *rhs;
1.196 kristaps 774: enum mandoc_esc esc;
1.216 schwarze 775: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
776: ASCII_BREAK, '\0' };
1.171 kristaps 777:
1.184 kristaps 778: /*
779: * Account for escaped sequences within string length
780: * calculations. This follows the logic in term_word() as we
781: * must calculate the width of produced strings.
782: */
783:
784: sz = 0;
1.203 schwarze 785: skip = 0;
1.189 kristaps 786: while ('\0' != *cp) {
787: rsz = strcspn(cp, rej);
788: for (i = 0; i < rsz; i++)
1.203 schwarze 789: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 790:
1.184 kristaps 791: switch (*cp) {
1.222 schwarze 792: case '\\':
1.189 kristaps 793: cp++;
1.196 kristaps 794: esc = mandoc_escape(&cp, &seq, &ssz);
795: if (ESCAPE_ERROR == esc)
1.224 schwarze 796: continue;
1.196 kristaps 797:
798: rhs = NULL;
799:
800: switch (esc) {
1.222 schwarze 801: case ESCAPE_UNICODE:
1.234 schwarze 802: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 803: break;
1.222 schwarze 804: case ESCAPE_NUMBERED:
1.233 schwarze 805: uc = mchars_num2char(seq, ssz);
806: if (uc < 0)
807: continue;
1.171 kristaps 808: break;
1.222 schwarze 809: case ESCAPE_SPECIAL:
1.233 schwarze 810: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 811: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 812: if (rhs != NULL)
813: break;
814: } else {
1.254 schwarze 815: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 816: if (uc > 0)
817: sz += cond_width(p, uc, &skip);
1.229 schwarze 818: }
1.233 schwarze 819: continue;
1.222 schwarze 820: case ESCAPE_SKIPCHAR:
1.203 schwarze 821: skip = 1;
1.243 schwarze 822: continue;
823: case ESCAPE_OVERSTRIKE:
824: rsz = 0;
825: rhs = seq + ssz;
826: while (seq < rhs) {
827: if (*seq == '\\') {
828: mandoc_escape(&seq, NULL, NULL);
829: continue;
830: }
831: i = (*p->width)(p, *seq++);
832: if (rsz < i)
833: rsz = i;
834: }
835: sz += rsz;
1.233 schwarze 836: continue;
1.171 kristaps 837: default:
1.233 schwarze 838: continue;
1.171 kristaps 839: }
1.149 kristaps 840:
1.233 schwarze 841: /*
842: * Common handling for Unicode and numbered
843: * character escape sequences.
844: */
845:
846: if (rhs == NULL) {
847: if (p->enc == TERMENC_ASCII) {
848: rhs = ascii_uc2str(uc);
849: rsz = strlen(rhs);
850: } else {
851: if ((uc < 0x20 && uc != 0x09) ||
852: (uc > 0x7E && uc < 0xA0))
853: uc = 0xFFFD;
854: sz += cond_width(p, uc, &skip);
855: continue;
856: }
857: }
1.184 kristaps 858:
1.203 schwarze 859: if (skip) {
860: skip = 0;
861: break;
862: }
1.233 schwarze 863:
864: /*
865: * Common handling for all escape sequences
866: * printing more than one character.
867: */
1.203 schwarze 868:
1.184 kristaps 869: for (i = 0; i < rsz; i++)
870: sz += (*p->width)(p, *rhs++);
871: break;
1.222 schwarze 872: case ASCII_NBRSP:
1.203 schwarze 873: sz += cond_width(p, ' ', &skip);
1.176 kristaps 874: cp++;
1.184 kristaps 875: break;
1.222 schwarze 876: case ASCII_HYPH:
1.203 schwarze 877: sz += cond_width(p, '-', &skip);
1.176 kristaps 878: cp++;
1.184 kristaps 879: break;
880: default:
881: break;
882: }
1.189 kristaps 883: }
1.149 kristaps 884:
1.252 schwarze 885: return sz;
1.149 kristaps 886: }
887:
1.240 schwarze 888: int
1.149 kristaps 889: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 890: {
891: double r;
1.241 schwarze 892: int ri;
1.106 kristaps 893:
1.107 kristaps 894: switch (su->unit) {
1.239 schwarze 895: case SCALE_BU:
896: r = su->scale / 40.0;
897: break;
1.222 schwarze 898: case SCALE_CM:
1.239 schwarze 899: r = su->scale * 6.0 / 2.54;
900: break;
901: case SCALE_FS:
902: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 903: break;
1.222 schwarze 904: case SCALE_IN:
1.225 schwarze 905: r = su->scale * 6.0;
1.106 kristaps 906: break;
1.239 schwarze 907: case SCALE_MM:
908: r = su->scale * 0.006;
909: break;
1.222 schwarze 910: case SCALE_PC:
1.107 kristaps 911: r = su->scale;
1.106 kristaps 912: break;
1.222 schwarze 913: case SCALE_PT:
1.239 schwarze 914: r = su->scale / 12.0;
1.106 kristaps 915: break;
1.239 schwarze 916: case SCALE_EN:
917: case SCALE_EM:
918: r = su->scale * 0.6;
1.106 kristaps 919: break;
1.222 schwarze 920: case SCALE_VS:
1.107 kristaps 921: r = su->scale;
1.106 kristaps 922: break;
923: default:
1.239 schwarze 924: abort();
1.106 kristaps 925: }
1.241 schwarze 926: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 927: return ri < 66 ? ri : 1;
1.106 kristaps 928: }
929:
1.247 schwarze 930: /*
931: * Convert a scaling width to basic units, rounding down.
932: */
1.240 schwarze 933: int
1.149 kristaps 934: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 935: {
1.108 kristaps 936:
1.252 schwarze 937: return (*p->hspan)(p, su);
1.106 kristaps 938: }
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