Annotation of mandoc/term.c, Revision 1.264
1.264 ! schwarze 1: /* $Id: term.c,v 1.263 2017/06/04 18:50:35 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 *);
1.210 schwarze 35: static void adjbuf(struct termp *p, 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: {
45:
1.231 schwarze 46: free(p->buf);
1.238 schwarze 47: free(p->fontq);
1.142 kristaps 48: free(p);
49: }
50:
51: void
1.222 schwarze 52: term_begin(struct termp *p, term_margin head,
1.246 schwarze 53: term_margin foot, const struct roff_meta *arg)
1.142 kristaps 54: {
55:
56: p->headf = head;
57: p->footf = foot;
58: p->argf = arg;
1.146 kristaps 59: (*p->begin)(p);
1.142 kristaps 60: }
61:
62: void
63: term_end(struct termp *p)
64: {
65:
1.146 kristaps 66: (*p->end)(p);
1.14 kristaps 67: }
68:
1.71 kristaps 69: /*
1.221 schwarze 70: * Flush a chunk of text. By default, break the output line each time
71: * the right margin is reached, and continue output on the next line
72: * at the same offset as the chunk itself. By default, also break the
73: * output line at the end of the chunk.
1.130 kristaps 74: * The following flags may be specified:
1.71 kristaps 75: *
1.221 schwarze 76: * - TERMP_NOBREAK: Do not break the output line at the right margin,
77: * but only at the max right margin. Also, do not break the output
78: * line at the end of the chunk, such that the next call can pad to
79: * the next column. However, if less than p->trailspace blanks,
80: * which can be 0, 1, or 2, remain to the right margin, the line
81: * will be broken.
1.250 schwarze 82: * - TERMP_BRTRSP: Consider trailing whitespace significant
83: * when deciding whether the chunk fits or not.
1.221 schwarze 84: * - TERMP_BRIND: If the chunk does not fit and the output line has
85: * to be broken, start the next line at the right margin instead
86: * of at the offset. Used together with TERMP_NOBREAK for the tags
87: * in various kinds of tagged lists.
1.263 schwarze 88: * - TERMP_HANG: Do not break the output line at the right margin,
1.221 schwarze 89: * append the next chunk after it even if this one is too long.
90: * To be used together with TERMP_NOBREAK.
1.263 schwarze 91: * - TERMP_NOPAD: Start writing at the current position,
92: * do not pad with blank characters up to the offset.
1.71 kristaps 93: */
94: void
95: term_flushln(struct termp *p)
1.53 kristaps 96: {
1.210 schwarze 97: size_t i; /* current input position in p->buf */
1.205 schwarze 98: int ntab; /* number of tabs to prepend */
1.114 kristaps 99: size_t vis; /* current visual position on output */
100: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 101: size_t vend; /* end of word visual position on output */
1.114 kristaps 102: size_t bp; /* visual right border position */
1.172 schwarze 103: size_t dv; /* temporary for visual pos calculations */
1.210 schwarze 104: size_t j; /* temporary loop index for p->buf */
105: size_t jhy; /* last hyph before overflow w/r/t j */
1.152 kristaps 106: size_t maxvis; /* output position of visible boundary */
1.53 kristaps 107:
1.263 schwarze 108: vbl = (p->flags & TERMP_NOPAD) || p->offset < p->viscol ? 0 :
109: p->offset - p->viscol;
110: if (p->minbl && vbl < p->minbl)
111: vbl = p->minbl;
112: maxvis = p->rmargin > p->viscol + vbl ?
113: p->rmargin - p->viscol - vbl : 0;
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;
118: i = 0;
1.115 kristaps 119:
1.188 kristaps 120: while (i < p->col) {
1.71 kristaps 121: /*
1.154 kristaps 122: * Handle literal tab characters: collapse all
123: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 124: */
1.205 schwarze 125: ntab = 0;
1.260 schwarze 126: while (i < p->col && p->buf[i] == '\t') {
127: vend = term_tab_next(vis);
1.138 schwarze 128: vbl += vend - vis;
129: vis = vend;
1.205 schwarze 130: ntab++;
1.169 schwarze 131: i++;
1.138 schwarze 132: }
133:
134: /*
1.71 kristaps 135: * Count up visible word characters. Control sequences
136: * (starting with the CSI) aren't counted. A space
137: * generates a non-printing word, which is valid (the
138: * space is printed according to regular spacing rules).
139: */
140:
1.188 kristaps 141: for (j = i, jhy = 0; j < p->col; j++) {
1.208 schwarze 142: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.71 kristaps 143: break;
1.154 kristaps 144:
1.257 schwarze 145: /* Back over the last printed character. */
1.154 kristaps 146: if (8 == p->buf[j]) {
1.153 kristaps 147: assert(j);
148: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 149: continue;
1.153 kristaps 150: }
1.154 kristaps 151:
152: /* Regular word. */
153: /* Break at the hyphen point if we overrun. */
1.222 schwarze 154: if (vend > vis && vend < bp &&
1.216 schwarze 155: (ASCII_HYPH == p->buf[j] ||
156: ASCII_BREAK == p->buf[j]))
1.154 kristaps 157: jhy = j;
158:
1.217 schwarze 159: /*
160: * Hyphenation now decided, put back a real
161: * hyphen such that we get the correct width.
162: */
163: if (ASCII_HYPH == p->buf[j])
164: p->buf[j] = '-';
165:
1.154 kristaps 166: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 167: }
1.53 kristaps 168:
1.71 kristaps 169: /*
1.81 kristaps 170: * Find out whether we would exceed the right margin.
1.136 schwarze 171: * If so, break to the next line.
1.81 kristaps 172: */
1.264 ! schwarze 173: if (vend > bp && 0 == jhy && vis > 0 &&
! 174: (p->flags & TERMP_BRNEVER) == 0) {
1.136 schwarze 175: vend -= vis;
1.264 ! schwarze 176: endline(p);
1.205 schwarze 177:
1.260 schwarze 178: /* Use pending tabs on the new line. */
179:
180: vbl = 0;
181: while (ntab--)
182: vbl = term_tab_next(vbl);
183:
184: /* Re-establish indentation. */
1.205 schwarze 185:
1.263 schwarze 186: if (p->flags & TERMP_BRIND)
1.260 schwarze 187: vbl += p->rmargin;
1.263 schwarze 188: else
1.260 schwarze 189: vbl += p->offset;
1.263 schwarze 190: maxvis = p->rmargin > vbl ? p->rmargin - vbl : 0;
191: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
192: p->maxrmargin > vbl ? p->maxrmargin - vbl : 0;
1.71 kristaps 193: }
1.138 schwarze 194:
1.130 kristaps 195: /* Write out the [remaining] word. */
1.188 kristaps 196: for ( ; i < p->col; i++) {
1.140 kristaps 197: if (vend > bp && jhy > 0 && i > jhy)
198: break;
1.138 schwarze 199: if ('\t' == p->buf[i])
200: break;
1.136 schwarze 201: if (' ' == p->buf[i]) {
1.164 kristaps 202: j = i;
1.228 kristaps 203: while (i < p->col && ' ' == p->buf[i])
1.136 schwarze 204: i++;
1.210 schwarze 205: dv = (i - j) * (*p->width)(p, ' ');
1.172 schwarze 206: vbl += dv;
207: vend += dv;
1.71 kristaps 208: break;
1.136 schwarze 209: }
210: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 211: vbl += (*p->width)(p, ' ');
1.136 schwarze 212: continue;
213: }
1.216 schwarze 214: if (ASCII_BREAK == p->buf[i])
215: continue;
1.130 kristaps 216:
1.136 schwarze 217: /*
218: * Now we definitely know there will be
219: * printable characters to output,
220: * so write preceding white space now.
221: */
222: if (vbl) {
1.146 kristaps 223: (*p->advance)(p, vbl);
1.139 schwarze 224: p->viscol += vbl;
1.136 schwarze 225: vbl = 0;
1.200 schwarze 226: }
227:
228: (*p->letter)(p, p->buf[i]);
229: if (8 == p->buf[i])
230: p->viscol -= (*p->width)(p, p->buf[i-1]);
1.222 schwarze 231: else
1.153 kristaps 232: p->viscol += (*p->width)(p, p->buf[i]);
1.136 schwarze 233: }
234: vis = vend;
1.71 kristaps 235: }
1.168 schwarze 236:
237: /*
238: * If there was trailing white space, it was not printed;
239: * so reset the cursor position accordingly.
240: */
1.235 schwarze 241: if (vis > vbl)
1.200 schwarze 242: vis -= vbl;
1.235 schwarze 243: else
244: vis = 0;
1.111 kristaps 245:
1.91 kristaps 246: p->col = 0;
1.264 ! schwarze 247: p->minbl = p->trailspace;
1.263 schwarze 248: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD);
1.15 kristaps 249:
1.250 schwarze 250: /* Trailing whitespace is significant in some columns. */
251: if (vis && vbl && (TERMP_BRTRSP & p->flags))
252: vis += vbl;
1.15 kristaps 253:
1.200 schwarze 254: /* If the column was overrun, break the line. */
1.264 ! schwarze 255: if ((p->flags & TERMP_NOBREAK) == 0 ||
! 256: ((p->flags & TERMP_HANG) == 0 &&
! 257: vis + p->trailspace * (*p->width)(p, ' ') > maxvis))
! 258: endline(p);
! 259: }
! 260:
! 261: static void
! 262: endline(struct termp *p)
! 263: {
! 264: if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) {
! 265: p->mc = NULL;
! 266: p->flags &= ~TERMP_ENDMC;
! 267: }
! 268: if (p->mc != NULL) {
! 269: if (p->viscol && p->maxrmargin >= p->viscol)
! 270: (*p->advance)(p, p->maxrmargin - p->viscol + 1);
! 271: p->flags |= TERMP_NOBUF | TERMP_NOSPACE;
! 272: term_word(p, p->mc);
! 273: p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC);
! 274: }
! 275: p->viscol = 0;
! 276: p->minbl = 0;
! 277: (*p->endline)(p);
1.15 kristaps 278: }
279:
1.222 schwarze 280: /*
1.71 kristaps 281: * A newline only breaks an existing line; it won't assert vertical
282: * space. All data in the output buffer is flushed prior to the newline
283: * assertion.
284: */
285: void
286: term_newln(struct termp *p)
1.15 kristaps 287: {
288:
1.71 kristaps 289: p->flags |= TERMP_NOSPACE;
1.200 schwarze 290: if (p->col || p->viscol)
291: term_flushln(p);
1.16 kristaps 292: }
293:
1.71 kristaps 294: /*
295: * Asserts a vertical space (a full, empty line-break between lines).
296: * Note that if used twice, this will cause two blank spaces and so on.
297: * All data in the output buffer is flushed prior to the newline
298: * assertion.
299: */
300: void
301: term_vspace(struct termp *p)
1.16 kristaps 302: {
303:
1.62 kristaps 304: term_newln(p);
1.139 schwarze 305: p->viscol = 0;
1.264 ! schwarze 306: p->minbl = 0;
1.202 schwarze 307: if (0 < p->skipvsp)
308: p->skipvsp--;
309: else
310: (*p->endline)(p);
1.16 kristaps 311: }
312:
1.238 schwarze 313: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 314: void
315: term_fontlast(struct termp *p)
316: {
317: enum termfont f;
318:
319: f = p->fontl;
320: p->fontl = p->fontq[p->fonti];
321: p->fontq[p->fonti] = f;
322: }
323:
1.238 schwarze 324: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 325: void
326: term_fontrepl(struct termp *p, enum termfont f)
327: {
328:
329: p->fontl = p->fontq[p->fonti];
330: p->fontq[p->fonti] = f;
331: }
332:
1.238 schwarze 333: /* Set font, save previous. */
1.125 kristaps 334: void
335: term_fontpush(struct termp *p, enum termfont f)
336: {
337:
338: p->fontl = p->fontq[p->fonti];
1.238 schwarze 339: if (++p->fonti == p->fontsz) {
340: p->fontsz += 8;
341: p->fontq = mandoc_reallocarray(p->fontq,
1.256 schwarze 342: p->fontsz, sizeof(*p->fontq));
1.238 schwarze 343: }
344: p->fontq[p->fonti] = f;
1.125 kristaps 345: }
346:
1.238 schwarze 347: /* Flush to make the saved pointer current again. */
1.125 kristaps 348: void
1.244 schwarze 349: term_fontpopq(struct termp *p, int i)
1.125 kristaps 350: {
351:
1.244 schwarze 352: assert(i >= 0);
353: if (p->fonti > i)
354: p->fonti = i;
1.125 kristaps 355: }
1.94 kristaps 356:
1.238 schwarze 357: /* Pop one font off the stack. */
1.125 kristaps 358: void
359: term_fontpop(struct termp *p)
360: {
361:
362: assert(p->fonti);
363: p->fonti--;
1.17 kristaps 364: }
365:
1.71 kristaps 366: /*
367: * Handle pwords, partial words, which may be either a single word or a
368: * phrase that cannot be broken down (such as a literal string). This
369: * handles word styling.
370: */
1.86 kristaps 371: void
372: term_word(struct termp *p, const char *word)
1.65 kristaps 373: {
1.261 schwarze 374: struct roffsu su;
1.214 schwarze 375: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 376: const char *seq, *cp;
1.194 kristaps 377: int sz, uc;
1.262 schwarze 378: size_t csz, lsz, ssz;
1.184 kristaps 379: enum mandoc_esc esc;
1.100 kristaps 380:
1.264 ! schwarze 381: if ((p->flags & TERMP_NOBUF) == 0) {
! 382: if ((p->flags & TERMP_NOSPACE) == 0) {
! 383: if ((p->flags & TERMP_KEEP) == 0) {
1.151 schwarze 384: bufferc(p, ' ');
1.264 ! schwarze 385: if (p->flags & TERMP_SENTENCE)
! 386: bufferc(p, ' ');
! 387: } else
! 388: bufferc(p, ASCII_NBRSP);
! 389: }
! 390: if (p->flags & TERMP_PREKEEP)
! 391: p->flags |= TERMP_KEEP;
! 392: if (p->flags & TERMP_NONOSPACE)
! 393: p->flags |= TERMP_NOSPACE;
! 394: else
! 395: p->flags &= ~TERMP_NOSPACE;
! 396: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
! 397: p->skipvsp = 0;
1.133 kristaps 398: }
1.65 kristaps 399:
1.184 kristaps 400: while ('\0' != *word) {
1.203 schwarze 401: if ('\\' != *word) {
1.214 schwarze 402: if (TERMP_NBRWORD & p->flags) {
403: if (' ' == *word) {
404: encode(p, nbrsp, 1);
405: word++;
406: continue;
407: }
408: ssz = strcspn(word, "\\ ");
409: } else
410: ssz = strcspn(word, "\\");
1.162 kristaps 411: encode(p, word, ssz);
1.203 schwarze 412: word += (int)ssz;
1.124 kristaps 413: continue;
1.203 schwarze 414: }
1.124 kristaps 415:
1.184 kristaps 416: word++;
417: esc = mandoc_escape(&word, &seq, &sz);
418: if (ESCAPE_ERROR == esc)
1.224 schwarze 419: continue;
1.124 kristaps 420:
1.184 kristaps 421: switch (esc) {
1.222 schwarze 422: case ESCAPE_UNICODE:
1.229 schwarze 423: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 424: break;
1.222 schwarze 425: case ESCAPE_NUMBERED:
1.233 schwarze 426: uc = mchars_num2char(seq, sz);
427: if (uc < 0)
428: continue;
1.184 kristaps 429: break;
1.222 schwarze 430: case ESCAPE_SPECIAL:
1.229 schwarze 431: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 432: cp = mchars_spec2str(seq, sz, &ssz);
1.232 schwarze 433: if (cp != NULL)
1.229 schwarze 434: encode(p, cp, ssz);
435: } else {
1.254 schwarze 436: uc = mchars_spec2cp(seq, sz);
1.230 schwarze 437: if (uc > 0)
438: encode1(p, uc);
1.229 schwarze 439: }
1.233 schwarze 440: continue;
1.222 schwarze 441: case ESCAPE_FONTBOLD:
1.125 kristaps 442: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 443: continue;
1.222 schwarze 444: case ESCAPE_FONTITALIC:
1.125 kristaps 445: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 446: continue;
1.222 schwarze 447: case ESCAPE_FONTBI:
1.209 schwarze 448: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 449: continue;
1.222 schwarze 450: case ESCAPE_FONT:
451: case ESCAPE_FONTROMAN:
1.125 kristaps 452: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 453: continue;
1.222 schwarze 454: case ESCAPE_FONTPREV:
1.125 kristaps 455: term_fontlast(p);
1.233 schwarze 456: continue;
1.222 schwarze 457: case ESCAPE_NOSPACE:
1.248 schwarze 458: if (p->flags & TERMP_BACKAFTER)
459: p->flags &= ~TERMP_BACKAFTER;
460: else if (*word == '\0')
1.237 schwarze 461: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.261 schwarze 462: continue;
463: case ESCAPE_HORIZ:
464: if (a2roffsu(seq, &su, SCALE_EM) == 0)
465: continue;
466: uc = term_hspan(p, &su) / 24;
467: if (uc > 0)
468: while (uc-- > 0)
469: bufferc(p, ASCII_NBRSP);
470: else if (p->col > (size_t)(-uc))
471: p->col += uc;
472: else {
473: uc += p->col;
474: p->col = 0;
475: if (p->offset > (size_t)(-uc)) {
476: p->ti += uc;
477: p->offset += uc;
478: } else {
479: p->ti -= p->offset;
480: p->offset = 0;
481: }
1.262 schwarze 482: }
483: continue;
484: case ESCAPE_HLINE:
485: if (a2roffsu(seq, &su, SCALE_EM) == 0)
486: continue;
487: uc = term_hspan(p, &su) / 24;
488: if (uc <= 0) {
489: if (p->rmargin <= p->offset)
490: continue;
491: lsz = p->rmargin - p->offset;
492: } else
493: lsz = uc;
494: while (sz &&
495: strchr(" %&()*+-./0123456789:<=>", *seq)) {
496: seq++;
497: sz--;
498: }
499: if (sz && strchr("cifMmnPpuv", *seq)) {
500: seq++;
501: sz--;
502: }
503: if (sz == 0)
504: uc = -1;
505: else if (*seq == '\\') {
506: seq++;
507: esc = mandoc_escape(&seq, &cp, &sz);
508: switch (esc) {
509: case ESCAPE_UNICODE:
510: uc = mchars_num2uc(cp + 1, sz - 1);
511: break;
512: case ESCAPE_NUMBERED:
513: uc = mchars_num2char(cp, sz);
514: break;
515: case ESCAPE_SPECIAL:
516: uc = mchars_spec2cp(cp, sz);
517: break;
518: default:
519: uc = -1;
520: break;
521: }
522: } else
523: uc = *seq;
524: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
525: uc = '_';
526: if (p->enc == TERMENC_ASCII) {
527: cp = ascii_uc2str(uc);
528: csz = term_strlen(p, cp);
529: ssz = strlen(cp);
530: } else
531: csz = (*p->width)(p, uc);
532: while (lsz >= csz) {
533: if (p->enc == TERMENC_ASCII)
534: encode(p, cp, ssz);
535: else
536: encode1(p, uc);
537: lsz -= csz;
1.261 schwarze 538: }
1.233 schwarze 539: continue;
1.222 schwarze 540: case ESCAPE_SKIPCHAR:
1.248 schwarze 541: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 542: continue;
1.243 schwarze 543: case ESCAPE_OVERSTRIKE:
544: cp = seq + sz;
545: while (seq < cp) {
546: if (*seq == '\\') {
547: mandoc_escape(&seq, NULL, NULL);
548: continue;
549: }
550: encode1(p, *seq++);
1.248 schwarze 551: if (seq < cp) {
552: if (p->flags & TERMP_BACKBEFORE)
553: p->flags |= TERMP_BACKAFTER;
554: else
555: p->flags |= TERMP_BACKBEFORE;
556: }
1.243 schwarze 557: }
1.249 schwarze 558: /* Trim trailing backspace/blank pair. */
1.258 schwarze 559: if (p->col > 2 &&
560: (p->buf[p->col - 1] == ' ' ||
561: p->buf[p->col - 1] == '\t'))
1.249 schwarze 562: p->col -= 2;
1.248 schwarze 563: continue;
1.124 kristaps 564: default:
1.233 schwarze 565: continue;
566: }
567:
568: /*
569: * Common handling for Unicode and numbered
570: * character escape sequences.
571: */
572:
573: if (p->enc == TERMENC_ASCII) {
574: cp = ascii_uc2str(uc);
575: encode(p, cp, strlen(cp));
576: } else {
577: if ((uc < 0x20 && uc != 0x09) ||
578: (uc > 0x7E && uc < 0xA0))
579: uc = 0xFFFD;
580: encode1(p, uc);
1.124 kristaps 581: }
582: }
1.214 schwarze 583: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 584: }
585:
1.71 kristaps 586: static void
1.210 schwarze 587: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 588: {
589:
1.125 kristaps 590: if (0 == p->maxcols)
591: p->maxcols = 1024;
592: while (sz >= p->maxcols)
593: p->maxcols <<= 2;
594:
1.223 schwarze 595: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.51 kristaps 596: }
597:
1.79 kristaps 598: static void
1.125 kristaps 599: bufferc(struct termp *p, char c)
600: {
1.264 ! schwarze 601: if (p->flags & TERMP_NOBUF) {
! 602: (*p->letter)(p, c);
! 603: return;
! 604: }
1.125 kristaps 605: if (p->col + 1 >= p->maxcols)
606: adjbuf(p, p->col + 1);
1.188 kristaps 607: p->buf[p->col++] = c;
1.125 kristaps 608: }
609:
1.194 kristaps 610: /*
611: * See encode().
612: * Do this for a single (probably unicode) value.
613: * Does not check for non-decorated glyphs.
614: */
615: static void
616: encode1(struct termp *p, int c)
617: {
618: enum termfont f;
619:
1.264 ! schwarze 620: if (p->flags & TERMP_NOBUF) {
! 621: (*p->letter)(p, c);
! 622: return;
! 623: }
! 624:
1.248 schwarze 625: if (p->col + 7 >= p->maxcols)
626: adjbuf(p, p->col + 7);
1.194 kristaps 627:
1.255 schwarze 628: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 629: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 630:
1.248 schwarze 631: if (p->flags & TERMP_BACKBEFORE) {
1.258 schwarze 632: if (p->buf[p->col - 1] == ' ' || p->buf[p->col - 1] == '\t')
1.249 schwarze 633: p->col--;
634: else
635: p->buf[p->col++] = 8;
1.248 schwarze 636: p->flags &= ~TERMP_BACKBEFORE;
637: }
1.209 schwarze 638: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.194 kristaps 639: p->buf[p->col++] = '_';
1.209 schwarze 640: p->buf[p->col++] = 8;
641: }
642: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
643: if (ASCII_HYPH == c)
644: p->buf[p->col++] = '-';
645: else
646: p->buf[p->col++] = c;
647: p->buf[p->col++] = 8;
648: }
1.194 kristaps 649: p->buf[p->col++] = c;
1.248 schwarze 650: if (p->flags & TERMP_BACKAFTER) {
651: p->flags |= TERMP_BACKBEFORE;
652: p->flags &= ~TERMP_BACKAFTER;
653: }
1.194 kristaps 654: }
655:
1.125 kristaps 656: static void
657: encode(struct termp *p, const char *word, size_t sz)
658: {
1.210 schwarze 659: size_t i;
1.264 ! schwarze 660:
! 661: if (p->flags & TERMP_NOBUF) {
! 662: for (i = 0; i < sz; i++)
! 663: (*p->letter)(p, word[i]);
! 664: return;
! 665: }
1.188 kristaps 666:
1.248 schwarze 667: if (p->col + 2 + (sz * 5) >= p->maxcols)
668: adjbuf(p, p->col + 2 + (sz * 5));
1.165 kristaps 669:
1.210 schwarze 670: for (i = 0; i < sz; i++) {
1.209 schwarze 671: if (ASCII_HYPH == word[i] ||
672: isgraph((unsigned char)word[i]))
673: encode1(p, word[i]);
1.259 schwarze 674: else {
1.188 kristaps 675: p->buf[p->col++] = word[i];
1.259 schwarze 676:
677: /*
678: * Postpone the effect of \z while handling
679: * an overstrike sequence from ascii_uc2str().
680: */
681:
682: if (word[i] == '\b' &&
683: (p->flags & TERMP_BACKBEFORE)) {
684: p->flags &= ~TERMP_BACKBEFORE;
685: p->flags |= TERMP_BACKAFTER;
686: }
687: }
1.79 kristaps 688: }
1.219 schwarze 689: }
690:
691: void
692: term_setwidth(struct termp *p, const char *wstr)
693: {
694: struct roffsu su;
1.247 schwarze 695: int iop, width;
1.219 schwarze 696:
1.220 schwarze 697: iop = 0;
698: width = 0;
1.219 schwarze 699: if (NULL != wstr) {
700: switch (*wstr) {
1.222 schwarze 701: case '+':
1.219 schwarze 702: iop = 1;
703: wstr++;
704: break;
1.222 schwarze 705: case '-':
1.219 schwarze 706: iop = -1;
707: wstr++;
708: break;
709: default:
710: break;
711: }
1.220 schwarze 712: if (a2roffsu(wstr, &su, SCALE_MAX))
713: width = term_hspan(p, &su);
714: else
1.219 schwarze 715: iop = 0;
716: }
717: (*p->setwidth)(p, iop, width);
1.79 kristaps 718: }
1.106 kristaps 719:
1.107 kristaps 720: size_t
1.149 kristaps 721: term_len(const struct termp *p, size_t sz)
722: {
723:
1.252 schwarze 724: return (*p->width)(p, ' ') * sz;
1.149 kristaps 725: }
726:
1.203 schwarze 727: static size_t
728: cond_width(const struct termp *p, int c, int *skip)
729: {
730:
731: if (*skip) {
732: (*skip) = 0;
1.252 schwarze 733: return 0;
1.203 schwarze 734: } else
1.252 schwarze 735: return (*p->width)(p, c);
1.203 schwarze 736: }
1.149 kristaps 737:
738: size_t
739: term_strlen(const struct termp *p, const char *cp)
740: {
1.184 kristaps 741: size_t sz, rsz, i;
1.233 schwarze 742: int ssz, skip, uc;
1.171 kristaps 743: const char *seq, *rhs;
1.196 kristaps 744: enum mandoc_esc esc;
1.216 schwarze 745: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
746: ASCII_BREAK, '\0' };
1.171 kristaps 747:
1.184 kristaps 748: /*
749: * Account for escaped sequences within string length
750: * calculations. This follows the logic in term_word() as we
751: * must calculate the width of produced strings.
752: */
753:
754: sz = 0;
1.203 schwarze 755: skip = 0;
1.189 kristaps 756: while ('\0' != *cp) {
757: rsz = strcspn(cp, rej);
758: for (i = 0; i < rsz; i++)
1.203 schwarze 759: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 760:
1.184 kristaps 761: switch (*cp) {
1.222 schwarze 762: case '\\':
1.189 kristaps 763: cp++;
1.196 kristaps 764: esc = mandoc_escape(&cp, &seq, &ssz);
765: if (ESCAPE_ERROR == esc)
1.224 schwarze 766: continue;
1.196 kristaps 767:
768: rhs = NULL;
769:
770: switch (esc) {
1.222 schwarze 771: case ESCAPE_UNICODE:
1.234 schwarze 772: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 773: break;
1.222 schwarze 774: case ESCAPE_NUMBERED:
1.233 schwarze 775: uc = mchars_num2char(seq, ssz);
776: if (uc < 0)
777: continue;
1.171 kristaps 778: break;
1.222 schwarze 779: case ESCAPE_SPECIAL:
1.233 schwarze 780: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 781: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 782: if (rhs != NULL)
783: break;
784: } else {
1.254 schwarze 785: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 786: if (uc > 0)
787: sz += cond_width(p, uc, &skip);
1.229 schwarze 788: }
1.233 schwarze 789: continue;
1.222 schwarze 790: case ESCAPE_SKIPCHAR:
1.203 schwarze 791: skip = 1;
1.243 schwarze 792: continue;
793: case ESCAPE_OVERSTRIKE:
794: rsz = 0;
795: rhs = seq + ssz;
796: while (seq < rhs) {
797: if (*seq == '\\') {
798: mandoc_escape(&seq, NULL, NULL);
799: continue;
800: }
801: i = (*p->width)(p, *seq++);
802: if (rsz < i)
803: rsz = i;
804: }
805: sz += rsz;
1.233 schwarze 806: continue;
1.171 kristaps 807: default:
1.233 schwarze 808: continue;
1.171 kristaps 809: }
1.149 kristaps 810:
1.233 schwarze 811: /*
812: * Common handling for Unicode and numbered
813: * character escape sequences.
814: */
815:
816: if (rhs == NULL) {
817: if (p->enc == TERMENC_ASCII) {
818: rhs = ascii_uc2str(uc);
819: rsz = strlen(rhs);
820: } else {
821: if ((uc < 0x20 && uc != 0x09) ||
822: (uc > 0x7E && uc < 0xA0))
823: uc = 0xFFFD;
824: sz += cond_width(p, uc, &skip);
825: continue;
826: }
827: }
1.184 kristaps 828:
1.203 schwarze 829: if (skip) {
830: skip = 0;
831: break;
832: }
1.233 schwarze 833:
834: /*
835: * Common handling for all escape sequences
836: * printing more than one character.
837: */
1.203 schwarze 838:
1.184 kristaps 839: for (i = 0; i < rsz; i++)
840: sz += (*p->width)(p, *rhs++);
841: break;
1.222 schwarze 842: case ASCII_NBRSP:
1.203 schwarze 843: sz += cond_width(p, ' ', &skip);
1.176 kristaps 844: cp++;
1.184 kristaps 845: break;
1.222 schwarze 846: case ASCII_HYPH:
1.203 schwarze 847: sz += cond_width(p, '-', &skip);
1.176 kristaps 848: cp++;
1.184 kristaps 849: break;
850: default:
851: break;
852: }
1.189 kristaps 853: }
1.149 kristaps 854:
1.252 schwarze 855: return sz;
1.149 kristaps 856: }
857:
1.240 schwarze 858: int
1.149 kristaps 859: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 860: {
861: double r;
1.241 schwarze 862: int ri;
1.106 kristaps 863:
1.107 kristaps 864: switch (su->unit) {
1.239 schwarze 865: case SCALE_BU:
866: r = su->scale / 40.0;
867: break;
1.222 schwarze 868: case SCALE_CM:
1.239 schwarze 869: r = su->scale * 6.0 / 2.54;
870: break;
871: case SCALE_FS:
872: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 873: break;
1.222 schwarze 874: case SCALE_IN:
1.225 schwarze 875: r = su->scale * 6.0;
1.106 kristaps 876: break;
1.239 schwarze 877: case SCALE_MM:
878: r = su->scale * 0.006;
879: break;
1.222 schwarze 880: case SCALE_PC:
1.107 kristaps 881: r = su->scale;
1.106 kristaps 882: break;
1.222 schwarze 883: case SCALE_PT:
1.239 schwarze 884: r = su->scale / 12.0;
1.106 kristaps 885: break;
1.239 schwarze 886: case SCALE_EN:
887: case SCALE_EM:
888: r = su->scale * 0.6;
1.106 kristaps 889: break;
1.222 schwarze 890: case SCALE_VS:
1.107 kristaps 891: r = su->scale;
1.106 kristaps 892: break;
893: default:
1.239 schwarze 894: abort();
1.106 kristaps 895: }
1.241 schwarze 896: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 897: return ri < 66 ? ri : 1;
1.106 kristaps 898: }
899:
1.247 schwarze 900: /*
901: * Convert a scaling width to basic units, rounding down.
902: */
1.240 schwarze 903: int
1.149 kristaps 904: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 905: {
1.108 kristaps 906:
1.252 schwarze 907: return (*p->hspan)(p, su);
1.106 kristaps 908: }
CVSweb