Annotation of mandoc/term.c, Revision 1.268
1.268 ! schwarze 1: /* $Id: term.c,v 1.267 2017/06/07 20:01:19 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:
1.268 ! schwarze 482: if (a2roffsu(seq, &su, SCALE_EM) == NULL)
1.261 schwarze 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:
1.268 ! schwarze 503: if ((seq = a2roffsu(seq, &su, SCALE_EM)) == NULL)
1.262 schwarze 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;
1.268 ! schwarze 512: if (*seq == '\0')
1.262 schwarze 513: uc = -1;
514: else if (*seq == '\\') {
515: seq++;
516: esc = mandoc_escape(&seq, &cp, &sz);
517: switch (esc) {
518: case ESCAPE_UNICODE:
519: uc = mchars_num2uc(cp + 1, sz - 1);
520: break;
521: case ESCAPE_NUMBERED:
522: uc = mchars_num2char(cp, sz);
523: break;
524: case ESCAPE_SPECIAL:
525: uc = mchars_spec2cp(cp, sz);
526: break;
527: default:
528: uc = -1;
529: break;
530: }
531: } else
532: uc = *seq;
533: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
534: uc = '_';
535: if (p->enc == TERMENC_ASCII) {
536: cp = ascii_uc2str(uc);
537: csz = term_strlen(p, cp);
538: ssz = strlen(cp);
539: } else
540: csz = (*p->width)(p, uc);
541: while (lsz >= csz) {
542: if (p->enc == TERMENC_ASCII)
543: encode(p, cp, ssz);
544: else
545: encode1(p, uc);
546: lsz -= csz;
1.261 schwarze 547: }
1.233 schwarze 548: continue;
1.222 schwarze 549: case ESCAPE_SKIPCHAR:
1.248 schwarze 550: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 551: continue;
1.243 schwarze 552: case ESCAPE_OVERSTRIKE:
553: cp = seq + sz;
554: while (seq < cp) {
555: if (*seq == '\\') {
556: mandoc_escape(&seq, NULL, NULL);
557: continue;
558: }
559: encode1(p, *seq++);
1.248 schwarze 560: if (seq < cp) {
561: if (p->flags & TERMP_BACKBEFORE)
562: p->flags |= TERMP_BACKAFTER;
563: else
564: p->flags |= TERMP_BACKBEFORE;
565: }
1.243 schwarze 566: }
1.249 schwarze 567: /* Trim trailing backspace/blank pair. */
1.265 schwarze 568: if (p->lastcol > 2 &&
1.266 schwarze 569: (p->tcol->buf[p->lastcol - 1] == ' ' ||
570: p->tcol->buf[p->lastcol - 1] == '\t'))
1.265 schwarze 571: p->lastcol -= 2;
572: if (p->col > p->lastcol)
573: p->col = p->lastcol;
1.248 schwarze 574: continue;
1.124 kristaps 575: default:
1.233 schwarze 576: continue;
577: }
578:
579: /*
580: * Common handling for Unicode and numbered
581: * character escape sequences.
582: */
583:
584: if (p->enc == TERMENC_ASCII) {
585: cp = ascii_uc2str(uc);
586: encode(p, cp, strlen(cp));
587: } else {
588: if ((uc < 0x20 && uc != 0x09) ||
589: (uc > 0x7E && uc < 0xA0))
590: uc = 0xFFFD;
591: encode1(p, uc);
1.124 kristaps 592: }
593: }
1.214 schwarze 594: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 595: }
596:
1.71 kristaps 597: static void
1.266 schwarze 598: adjbuf(struct termp_col *c, size_t sz)
1.51 kristaps 599: {
1.266 schwarze 600: if (c->maxcols == 0)
601: c->maxcols = 1024;
602: while (c->maxcols <= sz)
603: c->maxcols <<= 2;
604: c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
1.51 kristaps 605: }
606:
1.79 kristaps 607: static void
1.125 kristaps 608: bufferc(struct termp *p, char c)
609: {
1.264 schwarze 610: if (p->flags & TERMP_NOBUF) {
611: (*p->letter)(p, c);
612: return;
613: }
1.266 schwarze 614: if (p->col + 1 >= p->tcol->maxcols)
615: adjbuf(p->tcol, p->col + 1);
1.265 schwarze 616: if (p->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 617: p->tcol->buf[p->col] = c;
1.265 schwarze 618: if (p->lastcol < ++p->col)
619: p->lastcol = p->col;
1.125 kristaps 620: }
621:
1.194 kristaps 622: /*
623: * See encode().
624: * Do this for a single (probably unicode) value.
625: * Does not check for non-decorated glyphs.
626: */
627: static void
628: encode1(struct termp *p, int c)
629: {
630: enum termfont f;
631:
1.264 schwarze 632: if (p->flags & TERMP_NOBUF) {
633: (*p->letter)(p, c);
634: return;
635: }
636:
1.266 schwarze 637: if (p->col + 7 >= p->tcol->maxcols)
638: adjbuf(p->tcol, p->col + 7);
1.194 kristaps 639:
1.255 schwarze 640: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 641: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 642:
1.248 schwarze 643: if (p->flags & TERMP_BACKBEFORE) {
1.266 schwarze 644: if (p->tcol->buf[p->col - 1] == ' ' ||
645: p->tcol->buf[p->col - 1] == '\t')
1.249 schwarze 646: p->col--;
647: else
1.266 schwarze 648: p->tcol->buf[p->col++] = '\b';
1.248 schwarze 649: p->flags &= ~TERMP_BACKBEFORE;
650: }
1.266 schwarze 651: if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
652: p->tcol->buf[p->col++] = '_';
653: p->tcol->buf[p->col++] = '\b';
654: }
655: if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
656: if (c == ASCII_HYPH)
657: p->tcol->buf[p->col++] = '-';
1.209 schwarze 658: else
1.266 schwarze 659: p->tcol->buf[p->col++] = c;
660: p->tcol->buf[p->col++] = '\b';
1.209 schwarze 661: }
1.265 schwarze 662: if (p->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 663: p->tcol->buf[p->col] = c;
1.265 schwarze 664: if (p->lastcol < ++p->col)
665: p->lastcol = p->col;
1.248 schwarze 666: if (p->flags & TERMP_BACKAFTER) {
667: p->flags |= TERMP_BACKBEFORE;
668: p->flags &= ~TERMP_BACKAFTER;
669: }
1.194 kristaps 670: }
671:
1.125 kristaps 672: static void
673: encode(struct termp *p, const char *word, size_t sz)
674: {
1.210 schwarze 675: size_t i;
1.264 schwarze 676:
677: if (p->flags & TERMP_NOBUF) {
678: for (i = 0; i < sz; i++)
679: (*p->letter)(p, word[i]);
680: return;
681: }
1.188 kristaps 682:
1.266 schwarze 683: if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
684: adjbuf(p->tcol, p->col + 2 + (sz * 5));
1.165 kristaps 685:
1.210 schwarze 686: for (i = 0; i < sz; i++) {
1.209 schwarze 687: if (ASCII_HYPH == word[i] ||
688: isgraph((unsigned char)word[i]))
689: encode1(p, word[i]);
1.259 schwarze 690: else {
1.265 schwarze 691: if (p->lastcol <= p->col ||
692: (word[i] != ' ' && word[i] != ASCII_NBRSP))
1.266 schwarze 693: p->tcol->buf[p->col] = word[i];
1.265 schwarze 694: p->col++;
1.259 schwarze 695:
696: /*
697: * Postpone the effect of \z while handling
698: * an overstrike sequence from ascii_uc2str().
699: */
700:
701: if (word[i] == '\b' &&
702: (p->flags & TERMP_BACKBEFORE)) {
703: p->flags &= ~TERMP_BACKBEFORE;
704: p->flags |= TERMP_BACKAFTER;
705: }
706: }
1.79 kristaps 707: }
1.265 schwarze 708: if (p->lastcol < p->col)
709: p->lastcol = p->col;
1.219 schwarze 710: }
711:
712: void
713: term_setwidth(struct termp *p, const char *wstr)
714: {
715: struct roffsu su;
1.247 schwarze 716: int iop, width;
1.219 schwarze 717:
1.220 schwarze 718: iop = 0;
719: width = 0;
1.219 schwarze 720: if (NULL != wstr) {
721: switch (*wstr) {
1.222 schwarze 722: case '+':
1.219 schwarze 723: iop = 1;
724: wstr++;
725: break;
1.222 schwarze 726: case '-':
1.219 schwarze 727: iop = -1;
728: wstr++;
729: break;
730: default:
731: break;
732: }
1.268 ! schwarze 733: if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
1.220 schwarze 734: width = term_hspan(p, &su);
735: else
1.219 schwarze 736: iop = 0;
737: }
738: (*p->setwidth)(p, iop, width);
1.79 kristaps 739: }
1.106 kristaps 740:
1.107 kristaps 741: size_t
1.149 kristaps 742: term_len(const struct termp *p, size_t sz)
743: {
744:
1.252 schwarze 745: return (*p->width)(p, ' ') * sz;
1.149 kristaps 746: }
747:
1.203 schwarze 748: static size_t
749: cond_width(const struct termp *p, int c, int *skip)
750: {
751:
752: if (*skip) {
753: (*skip) = 0;
1.252 schwarze 754: return 0;
1.203 schwarze 755: } else
1.252 schwarze 756: return (*p->width)(p, c);
1.203 schwarze 757: }
1.149 kristaps 758:
759: size_t
760: term_strlen(const struct termp *p, const char *cp)
761: {
1.184 kristaps 762: size_t sz, rsz, i;
1.233 schwarze 763: int ssz, skip, uc;
1.171 kristaps 764: const char *seq, *rhs;
1.196 kristaps 765: enum mandoc_esc esc;
1.216 schwarze 766: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
767: ASCII_BREAK, '\0' };
1.171 kristaps 768:
1.184 kristaps 769: /*
770: * Account for escaped sequences within string length
771: * calculations. This follows the logic in term_word() as we
772: * must calculate the width of produced strings.
773: */
774:
775: sz = 0;
1.203 schwarze 776: skip = 0;
1.189 kristaps 777: while ('\0' != *cp) {
778: rsz = strcspn(cp, rej);
779: for (i = 0; i < rsz; i++)
1.203 schwarze 780: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 781:
1.184 kristaps 782: switch (*cp) {
1.222 schwarze 783: case '\\':
1.189 kristaps 784: cp++;
1.196 kristaps 785: esc = mandoc_escape(&cp, &seq, &ssz);
786: if (ESCAPE_ERROR == esc)
1.224 schwarze 787: continue;
1.196 kristaps 788:
789: rhs = NULL;
790:
791: switch (esc) {
1.222 schwarze 792: case ESCAPE_UNICODE:
1.234 schwarze 793: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 794: break;
1.222 schwarze 795: case ESCAPE_NUMBERED:
1.233 schwarze 796: uc = mchars_num2char(seq, ssz);
797: if (uc < 0)
798: continue;
1.171 kristaps 799: break;
1.222 schwarze 800: case ESCAPE_SPECIAL:
1.233 schwarze 801: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 802: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 803: if (rhs != NULL)
804: break;
805: } else {
1.254 schwarze 806: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 807: if (uc > 0)
808: sz += cond_width(p, uc, &skip);
1.229 schwarze 809: }
1.233 schwarze 810: continue;
1.222 schwarze 811: case ESCAPE_SKIPCHAR:
1.203 schwarze 812: skip = 1;
1.243 schwarze 813: continue;
814: case ESCAPE_OVERSTRIKE:
815: rsz = 0;
816: rhs = seq + ssz;
817: while (seq < rhs) {
818: if (*seq == '\\') {
819: mandoc_escape(&seq, NULL, NULL);
820: continue;
821: }
822: i = (*p->width)(p, *seq++);
823: if (rsz < i)
824: rsz = i;
825: }
826: sz += rsz;
1.233 schwarze 827: continue;
1.171 kristaps 828: default:
1.233 schwarze 829: continue;
1.171 kristaps 830: }
1.149 kristaps 831:
1.233 schwarze 832: /*
833: * Common handling for Unicode and numbered
834: * character escape sequences.
835: */
836:
837: if (rhs == NULL) {
838: if (p->enc == TERMENC_ASCII) {
839: rhs = ascii_uc2str(uc);
840: rsz = strlen(rhs);
841: } else {
842: if ((uc < 0x20 && uc != 0x09) ||
843: (uc > 0x7E && uc < 0xA0))
844: uc = 0xFFFD;
845: sz += cond_width(p, uc, &skip);
846: continue;
847: }
848: }
1.184 kristaps 849:
1.203 schwarze 850: if (skip) {
851: skip = 0;
852: break;
853: }
1.233 schwarze 854:
855: /*
856: * Common handling for all escape sequences
857: * printing more than one character.
858: */
1.203 schwarze 859:
1.184 kristaps 860: for (i = 0; i < rsz; i++)
861: sz += (*p->width)(p, *rhs++);
862: break;
1.222 schwarze 863: case ASCII_NBRSP:
1.203 schwarze 864: sz += cond_width(p, ' ', &skip);
1.176 kristaps 865: cp++;
1.184 kristaps 866: break;
1.222 schwarze 867: case ASCII_HYPH:
1.203 schwarze 868: sz += cond_width(p, '-', &skip);
1.176 kristaps 869: cp++;
1.184 kristaps 870: break;
871: default:
872: break;
873: }
1.189 kristaps 874: }
1.149 kristaps 875:
1.252 schwarze 876: return sz;
1.149 kristaps 877: }
878:
1.240 schwarze 879: int
1.149 kristaps 880: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 881: {
882: double r;
1.241 schwarze 883: int ri;
1.106 kristaps 884:
1.107 kristaps 885: switch (su->unit) {
1.239 schwarze 886: case SCALE_BU:
887: r = su->scale / 40.0;
888: break;
1.222 schwarze 889: case SCALE_CM:
1.239 schwarze 890: r = su->scale * 6.0 / 2.54;
891: break;
892: case SCALE_FS:
893: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 894: break;
1.222 schwarze 895: case SCALE_IN:
1.225 schwarze 896: r = su->scale * 6.0;
1.106 kristaps 897: break;
1.239 schwarze 898: case SCALE_MM:
899: r = su->scale * 0.006;
900: break;
1.222 schwarze 901: case SCALE_PC:
1.107 kristaps 902: r = su->scale;
1.106 kristaps 903: break;
1.222 schwarze 904: case SCALE_PT:
1.239 schwarze 905: r = su->scale / 12.0;
1.106 kristaps 906: break;
1.239 schwarze 907: case SCALE_EN:
908: case SCALE_EM:
909: r = su->scale * 0.6;
1.106 kristaps 910: break;
1.222 schwarze 911: case SCALE_VS:
1.107 kristaps 912: r = su->scale;
1.106 kristaps 913: break;
914: default:
1.239 schwarze 915: abort();
1.106 kristaps 916: }
1.241 schwarze 917: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 918: return ri < 66 ? ri : 1;
1.106 kristaps 919: }
920:
1.247 schwarze 921: /*
922: * Convert a scaling width to basic units, rounding down.
923: */
1.240 schwarze 924: int
1.149 kristaps 925: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 926: {
1.108 kristaps 927:
1.252 schwarze 928: return (*p->hspan)(p, su);
1.106 kristaps 929: }
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