Annotation of src/usr.bin/mandoc/term.c, Revision 1.143
1.143 ! schwarze 1: /* $OpenBSD: term.c,v 1.142 2020/09/02 16:36:48 schwarze Exp $ */
1.1 kristaps 2: /*
1.59 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.142 schwarze 4: * Copyright (c) 2010-2020 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>
1.138 schwarze 22: #include <stdint.h>
1.1 kristaps 23: #include <stdio.h>
24: #include <stdlib.h>
25: #include <string.h>
26:
1.34 schwarze 27: #include "mandoc.h"
1.79 schwarze 28: #include "mandoc_aux.h"
1.16 schwarze 29: #include "out.h"
1.1 kristaps 30: #include "term.h"
1.16 schwarze 31: #include "main.h"
1.1 kristaps 32:
1.64 schwarze 33: static size_t cond_width(const struct termp *, int, int *);
1.126 schwarze 34: static void adjbuf(struct termp_col *, size_t);
1.59 schwarze 35: static void bufferc(struct termp *, char);
36: static void encode(struct termp *, const char *, size_t);
37: static void encode1(struct termp *, int);
1.124 schwarze 38: static void endline(struct termp *);
1.142 schwarze 39: static void term_field(struct termp *, size_t, size_t);
1.138 schwarze 40: static void term_fill(struct termp *, size_t *, size_t *,
41: size_t);
1.1 kristaps 42:
1.83 schwarze 43:
1.37 schwarze 44: void
1.129 schwarze 45: term_setcol(struct termp *p, size_t maxtcol)
46: {
47: if (maxtcol > p->maxtcol) {
48: p->tcols = mandoc_recallocarray(p->tcols,
49: p->maxtcol, maxtcol, sizeof(*p->tcols));
50: p->maxtcol = maxtcol;
51: }
52: p->lasttcol = maxtcol - 1;
53: p->tcol = p->tcols;
54: }
55:
56: void
1.37 schwarze 57: term_free(struct termp *p)
1.1 kristaps 58: {
1.126 schwarze 59: for (p->tcol = p->tcols; p->tcol < p->tcols + p->maxtcol; p->tcol++)
60: free(p->tcol->buf);
61: free(p->tcols);
1.98 schwarze 62: free(p->fontq);
1.37 schwarze 63: free(p);
1.1 kristaps 64: }
65:
1.13 schwarze 66: void
1.83 schwarze 67: term_begin(struct termp *p, term_margin head,
1.106 schwarze 68: term_margin foot, const struct roff_meta *arg)
1.1 kristaps 69: {
70:
1.37 schwarze 71: p->headf = head;
72: p->footf = foot;
73: p->argf = arg;
74: (*p->begin)(p);
1.1 kristaps 75: }
76:
1.37 schwarze 77: void
78: term_end(struct termp *p)
1.1 kristaps 79: {
80:
1.37 schwarze 81: (*p->end)(p);
1.1 kristaps 82: }
83:
84: /*
1.82 schwarze 85: * Flush a chunk of text. By default, break the output line each time
86: * the right margin is reached, and continue output on the next line
87: * at the same offset as the chunk itself. By default, also break the
1.138 schwarze 88: * output line at the end of the chunk. There are many flags modifying
89: * this behaviour, see the comments in the body of the function.
1.1 kristaps 90: */
91: void
92: term_flushln(struct termp *p)
93: {
1.138 schwarze 94: size_t vbl; /* Number of blanks to prepend to the output. */
95: size_t vbr; /* Actual visual position of the end of field. */
96: size_t vfield; /* Desired visual field width. */
97: size_t vtarget; /* Desired visual position of the right margin. */
98: size_t ic; /* Character position in the input buffer. */
99: size_t nbr; /* Number of characters to print in this field. */
100:
101: /*
102: * Normally, start writing at the left margin, but with the
103: * NOPAD flag, start writing at the current position instead.
104: */
1.1 kristaps 105:
1.126 schwarze 106: vbl = (p->flags & TERMP_NOPAD) || p->tcol->offset < p->viscol ?
107: 0 : p->tcol->offset - p->viscol;
1.123 schwarze 108: if (p->minbl && vbl < p->minbl)
109: vbl = p->minbl;
1.19 schwarze 110:
1.134 florian 111: if ((p->flags & TERMP_MULTICOL) == 0)
1.127 schwarze 112: p->tcol->col = 0;
1.138 schwarze 113:
114: /* Loop over output lines. */
115:
116: for (;;) {
117: vfield = p->tcol->rmargin > p->viscol + vbl ?
118: p->tcol->rmargin - p->viscol - vbl : 0;
1.127 schwarze 119:
1.22 schwarze 120: /*
1.138 schwarze 121: * Normally, break the line at the the right margin
122: * of the field, but with the NOBREAK flag, only
123: * break it at the max right margin of the screen,
124: * and with the BRNEVER flag, never break it at all.
1.30 schwarze 125: */
1.127 schwarze 126:
1.142 schwarze 127: vtarget = (p->flags & TERMP_NOBREAK) == 0 ? vfield :
1.138 schwarze 128: p->maxrmargin > p->viscol + vbl ?
129: p->maxrmargin - p->viscol - vbl : 0;
130:
131: /*
132: * Figure out how much text will fit in the field.
133: * If there is whitespace only, print nothing.
134: */
135:
1.142 schwarze 136: term_fill(p, &nbr, &vbr,
137: p->flags & TERMP_BRNEVER ? SIZE_MAX : vtarget);
1.138 schwarze 138: if (nbr == 0)
139: break;
1.139 schwarze 140:
141: /*
142: * With the CENTER or RIGHT flag, increase the indentation
143: * to center the text between the left and right margins
144: * or to adjust it to the right margin, respectively.
145: */
146:
147: if (vbr < vtarget) {
148: if (p->flags & TERMP_CENTER)
149: vbl += (vtarget - vbr) / 2;
150: else if (p->flags & TERMP_RIGHT)
151: vbl += vtarget - vbr;
152: }
153:
154: /* Finally, print the field content. */
1.138 schwarze 155:
1.142 schwarze 156: term_field(p, vbl, nbr);
1.22 schwarze 157:
1.1 kristaps 158: /*
1.138 schwarze 159: * If there is no text left in the field, exit the loop.
160: * If the BRTRSP flag is set, consider trailing
161: * whitespace significant when deciding whether
162: * the field fits or not.
1.1 kristaps 163: */
164:
1.138 schwarze 165: for (ic = p->tcol->col; ic < p->tcol->lastcol; ic++) {
166: switch (p->tcol->buf[ic]) {
167: case '\t':
168: if (p->flags & TERMP_BRTRSP)
169: vbr = term_tab_next(vbr);
170: continue;
171: case ' ':
172: if (p->flags & TERMP_BRTRSP)
173: vbr += (*p->width)(p, ' ');
1.130 schwarze 174: continue;
1.138 schwarze 175: case '\n':
176: case ASCII_BREAK:
177: continue;
178: default:
179: break;
1.130 schwarze 180: }
1.138 schwarze 181: break;
182: }
183: if (ic == p->tcol->lastcol)
184: break;
1.42 schwarze 185:
1.138 schwarze 186: /*
187: * At the location of an automtic line break, input
188: * space characters are consumed by the line break.
189: */
1.42 schwarze 190:
1.138 schwarze 191: while (p->tcol->col < p->tcol->lastcol &&
192: p->tcol->buf[p->tcol->col] == ' ')
193: p->tcol->col++;
1.42 schwarze 194:
1.138 schwarze 195: /*
196: * In multi-column mode, leave the rest of the text
197: * in the buffer to be handled by a subsequent
198: * invocation, such that the other columns of the
199: * table can be handled first.
200: * In single-column mode, simply break the line.
201: */
202:
203: if (p->flags & TERMP_MULTICOL)
204: return;
1.78 schwarze 205:
1.138 schwarze 206: endline(p);
207: p->viscol = 0;
1.1 kristaps 208:
209: /*
1.138 schwarze 210: * Normally, start the next line at the same indentation
211: * as this one, but with the BRIND flag, start it at the
212: * right margin instead. This is used together with
213: * NOBREAK for the tags in various kinds of tagged lists.
1.5 schwarze 214: */
1.127 schwarze 215:
1.138 schwarze 216: vbl = p->flags & TERMP_BRIND ?
217: p->tcol->rmargin : p->tcol->offset;
218: }
1.127 schwarze 219:
1.138 schwarze 220: /* Reset output state in preparation for the next field. */
1.66 schwarze 221:
1.138 schwarze 222: p->col = p->tcol->col = p->tcol->lastcol = 0;
223: p->minbl = p->trailspace;
224: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD);
1.120 schwarze 225:
1.138 schwarze 226: if (p->flags & TERMP_MULTICOL)
227: return;
1.120 schwarze 228:
1.138 schwarze 229: /*
230: * The HANG flag means that the next field
231: * always follows on the same line.
232: * The NOBREAK flag means that the next field
233: * follows on the same line unless the field was overrun.
234: * Normally, break the line at the end of each field.
235: */
1.66 schwarze 236:
1.138 schwarze 237: if ((p->flags & TERMP_HANG) == 0 &&
238: ((p->flags & TERMP_NOBREAK) == 0 ||
239: vbr + term_len(p, p->trailspace) > vfield))
240: endline(p);
241: }
1.30 schwarze 242:
1.138 schwarze 243: /*
244: * Store the number of input characters to print in this field in *nbr
245: * and their total visual width to print in *vbr.
246: * If there is only whitespace in the field, both remain zero.
247: * The desired visual width of the field is provided by vtarget.
248: * If the first word is longer, the field will be overrun.
249: */
250: static void
251: term_fill(struct termp *p, size_t *nbr, size_t *vbr, size_t vtarget)
252: {
253: size_t ic; /* Character position in the input buffer. */
254: size_t vis; /* Visual position of the current character. */
255: size_t vn; /* Visual position of the next character. */
256: int breakline; /* Break at the end of this word. */
257: int graph; /* Last character was non-blank. */
258:
259: *nbr = *vbr = vis = 0;
260: breakline = graph = 0;
261: for (ic = p->tcol->col; ic < p->tcol->lastcol; ic++) {
262: switch (p->tcol->buf[ic]) {
263: case '\b': /* Escape \o (overstrike) or backspace markup. */
264: assert(ic > 0);
265: vis -= (*p->width)(p, p->tcol->buf[ic - 1]);
266: continue;
1.127 schwarze 267:
1.138 schwarze 268: case '\t': /* Normal ASCII whitespace. */
269: case ' ':
270: case ASCII_BREAK: /* Escape \: (breakpoint). */
271: switch (p->tcol->buf[ic]) {
272: case '\t':
273: vn = term_tab_next(vis);
1.30 schwarze 274: break;
1.138 schwarze 275: case ' ':
276: vn = vis + (*p->width)(p, ' ');
1.1 kristaps 277: break;
1.138 schwarze 278: case ASCII_BREAK:
279: vn = vis;
1.22 schwarze 280: break;
1.141 schwarze 281: default:
282: abort();
1.22 schwarze 283: }
1.138 schwarze 284: /* Can break at the end of a word. */
285: if (breakline || vn > vtarget)
286: break;
287: if (graph) {
288: *nbr = ic;
289: *vbr = vis;
290: graph = 0;
1.33 schwarze 291: }
1.138 schwarze 292: vis = vn;
293: continue;
294:
295: case '\n': /* Escape \p (break at the end of the word). */
296: breakline = 1;
297: continue;
1.33 schwarze 298:
1.138 schwarze 299: case ASCII_HYPH: /* Breakable hyphen. */
300: graph = 1;
1.33 schwarze 301: /*
1.138 schwarze 302: * We are about to decide whether to break the
303: * line or not, so we no longer need this hyphen
304: * to be marked as breakable. Put back a real
305: * hyphen such that we get the correct width.
1.33 schwarze 306: */
1.138 schwarze 307: p->tcol->buf[ic] = '-';
308: vis += (*p->width)(p, '-');
309: if (vis > vtarget) {
310: ic++;
311: break;
1.61 schwarze 312: }
1.138 schwarze 313: *nbr = ic + 1;
314: *vbr = vis;
315: continue;
1.61 schwarze 316:
1.138 schwarze 317: case ASCII_NBRSP: /* Non-breakable space. */
318: p->tcol->buf[ic] = ' ';
319: /* FALLTHROUGH */
320: default: /* Printable character. */
321: graph = 1;
322: vis += (*p->width)(p, p->tcol->buf[ic]);
323: if (vis > vtarget && *nbr > 0)
324: return;
325: continue;
1.1 kristaps 326: }
1.138 schwarze 327: break;
328: }
1.130 schwarze 329:
1.138 schwarze 330: /*
331: * If the last word extends to the end of the field without any
332: * trailing whitespace, the loop could not check yet whether it
333: * can remain on this line. So do the check now.
334: */
1.130 schwarze 335:
1.138 schwarze 336: if (graph && (vis <= vtarget || *nbr == 0)) {
337: *nbr = ic;
338: *vbr = vis;
339: }
340: }
1.130 schwarze 341:
1.138 schwarze 342: /*
343: * Print the contents of one field
344: * with an indentation of vbl visual columns,
1.142 schwarze 345: * and an input string length of nbr characters.
1.138 schwarze 346: */
347: static void
1.142 schwarze 348: term_field(struct termp *p, size_t vbl, size_t nbr)
1.138 schwarze 349: {
350: size_t ic; /* Character position in the input buffer. */
351: size_t vis; /* Visual position of the current character. */
352: size_t dv; /* Visual width of the current character. */
353: size_t vn; /* Visual position of the next character. */
1.130 schwarze 354:
1.138 schwarze 355: vis = 0;
356: for (ic = p->tcol->col; ic < nbr; ic++) {
1.130 schwarze 357:
1.138 schwarze 358: /*
359: * To avoid the printing of trailing whitespace,
360: * do not print whitespace right away, only count it.
361: */
1.130 schwarze 362:
1.138 schwarze 363: switch (p->tcol->buf[ic]) {
364: case '\n':
365: case ASCII_BREAK:
366: continue;
367: case '\t':
368: vn = term_tab_next(vis);
369: vbl += vn - vis;
370: vis = vn;
371: continue;
372: case ' ':
373: case ASCII_NBRSP:
1.140 schwarze 374: dv = (*p->width)(p, ' ');
375: vbl += dv;
376: vis += dv;
1.138 schwarze 377: continue;
378: default:
379: break;
380: }
1.48 schwarze 381:
1.138 schwarze 382: /*
383: * We found a non-blank character to print,
384: * so write preceding white space now.
385: */
1.127 schwarze 386:
1.138 schwarze 387: if (vbl > 0) {
388: (*p->advance)(p, vbl);
389: p->viscol += vbl;
390: vbl = 0;
391: }
1.18 schwarze 392:
1.138 schwarze 393: /* Print the character and adjust the visual position. */
1.1 kristaps 394:
1.138 schwarze 395: (*p->letter)(p, p->tcol->buf[ic]);
396: if (p->tcol->buf[ic] == '\b') {
397: dv = (*p->width)(p, p->tcol->buf[ic - 1]);
398: p->viscol -= dv;
399: vis -= dv;
400: } else {
401: dv = (*p->width)(p, p->tcol->buf[ic]);
402: p->viscol += dv;
403: vis += dv;
404: }
405: }
406: p->tcol->col = nbr;
1.124 schwarze 407: }
408:
409: static void
410: endline(struct termp *p)
411: {
412: if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) {
413: p->mc = NULL;
414: p->flags &= ~TERMP_ENDMC;
415: }
416: if (p->mc != NULL) {
417: if (p->viscol && p->maxrmargin >= p->viscol)
418: (*p->advance)(p, p->maxrmargin - p->viscol + 1);
419: p->flags |= TERMP_NOBUF | TERMP_NOSPACE;
420: term_word(p, p->mc);
421: p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC);
422: }
423: p->viscol = 0;
424: p->minbl = 0;
425: (*p->endline)(p);
1.1 kristaps 426: }
427:
1.83 schwarze 428: /*
1.1 kristaps 429: * A newline only breaks an existing line; it won't assert vertical
430: * space. All data in the output buffer is flushed prior to the newline
431: * assertion.
432: */
433: void
434: term_newln(struct termp *p)
435: {
436:
437: p->flags |= TERMP_NOSPACE;
1.129 schwarze 438: if (p->tcol->lastcol || p->viscol)
1.61 schwarze 439: term_flushln(p);
1.1 kristaps 440: }
441:
442: /*
443: * Asserts a vertical space (a full, empty line-break between lines).
444: * Note that if used twice, this will cause two blank spaces and so on.
445: * All data in the output buffer is flushed prior to the newline
446: * assertion.
447: */
448: void
449: term_vspace(struct termp *p)
450: {
451:
452: term_newln(p);
1.29 schwarze 453: p->viscol = 0;
1.124 schwarze 454: p->minbl = 0;
1.63 schwarze 455: if (0 < p->skipvsp)
456: p->skipvsp--;
457: else
458: (*p->endline)(p);
1.1 kristaps 459: }
460:
1.98 schwarze 461: /* Swap current and previous font; for \fP and .ft P */
1.20 schwarze 462: void
463: term_fontlast(struct termp *p)
464: {
465: enum termfont f;
1.11 schwarze 466:
1.20 schwarze 467: f = p->fontl;
468: p->fontl = p->fontq[p->fonti];
469: p->fontq[p->fonti] = f;
470: }
471:
1.98 schwarze 472: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.20 schwarze 473: void
474: term_fontrepl(struct termp *p, enum termfont f)
475: {
476:
477: p->fontl = p->fontq[p->fonti];
478: p->fontq[p->fonti] = f;
1.1 kristaps 479: }
480:
1.98 schwarze 481: /* Set font, save previous. */
1.20 schwarze 482: void
483: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 484: {
1.7 schwarze 485:
1.20 schwarze 486: p->fontl = p->fontq[p->fonti];
1.98 schwarze 487: if (++p->fonti == p->fontsz) {
488: p->fontsz += 8;
489: p->fontq = mandoc_reallocarray(p->fontq,
1.116 schwarze 490: p->fontsz, sizeof(*p->fontq));
1.98 schwarze 491: }
492: p->fontq[p->fonti] = f;
1.20 schwarze 493: }
1.1 kristaps 494:
1.98 schwarze 495: /* Flush to make the saved pointer current again. */
1.20 schwarze 496: void
1.104 schwarze 497: term_fontpopq(struct termp *p, int i)
1.20 schwarze 498: {
1.1 kristaps 499:
1.104 schwarze 500: assert(i >= 0);
501: if (p->fonti > i)
502: p->fonti = i;
1.20 schwarze 503: }
1.1 kristaps 504:
1.98 schwarze 505: /* Pop one font off the stack. */
1.20 schwarze 506: void
507: term_fontpop(struct termp *p)
508: {
1.1 kristaps 509:
1.20 schwarze 510: assert(p->fonti);
511: p->fonti--;
1.1 kristaps 512: }
513:
514: /*
515: * Handle pwords, partial words, which may be either a single word or a
516: * phrase that cannot be broken down (such as a literal string). This
517: * handles word styling.
518: */
1.7 schwarze 519: void
520: term_word(struct termp *p, const char *word)
1.1 kristaps 521: {
1.121 schwarze 522: struct roffsu su;
1.75 schwarze 523: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.59 schwarze 524: const char *seq, *cp;
525: int sz, uc;
1.122 schwarze 526: size_t csz, lsz, ssz;
1.59 schwarze 527: enum mandoc_esc esc;
1.1 kristaps 528:
1.124 schwarze 529: if ((p->flags & TERMP_NOBUF) == 0) {
530: if ((p->flags & TERMP_NOSPACE) == 0) {
531: if ((p->flags & TERMP_KEEP) == 0) {
1.40 schwarze 532: bufferc(p, ' ');
1.124 schwarze 533: if (p->flags & TERMP_SENTENCE)
534: bufferc(p, ' ');
535: } else
536: bufferc(p, ASCII_NBRSP);
537: }
538: if (p->flags & TERMP_PREKEEP)
539: p->flags |= TERMP_KEEP;
540: if (p->flags & TERMP_NONOSPACE)
541: p->flags |= TERMP_NOSPACE;
542: else
543: p->flags &= ~TERMP_NOSPACE;
544: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
545: p->skipvsp = 0;
1.31 schwarze 546: }
547:
1.59 schwarze 548: while ('\0' != *word) {
1.64 schwarze 549: if ('\\' != *word) {
1.75 schwarze 550: if (TERMP_NBRWORD & p->flags) {
551: if (' ' == *word) {
552: encode(p, nbrsp, 1);
553: word++;
554: continue;
555: }
556: ssz = strcspn(word, "\\ ");
557: } else
558: ssz = strcspn(word, "\\");
1.45 schwarze 559: encode(p, word, ssz);
1.64 schwarze 560: word += (int)ssz;
1.20 schwarze 561: continue;
1.64 schwarze 562: }
1.20 schwarze 563:
1.59 schwarze 564: word++;
565: esc = mandoc_escape(&word, &seq, &sz);
566: switch (esc) {
1.83 schwarze 567: case ESCAPE_UNICODE:
1.89 schwarze 568: uc = mchars_num2uc(seq + 1, sz - 1);
1.56 schwarze 569: break;
1.83 schwarze 570: case ESCAPE_NUMBERED:
1.93 schwarze 571: uc = mchars_num2char(seq, sz);
572: if (uc < 0)
573: continue;
1.20 schwarze 574: break;
1.83 schwarze 575: case ESCAPE_SPECIAL:
1.89 schwarze 576: if (p->enc == TERMENC_ASCII) {
1.114 schwarze 577: cp = mchars_spec2str(seq, sz, &ssz);
1.92 schwarze 578: if (cp != NULL)
1.89 schwarze 579: encode(p, cp, ssz);
580: } else {
1.114 schwarze 581: uc = mchars_spec2cp(seq, sz);
1.90 schwarze 582: if (uc > 0)
583: encode1(p, uc);
1.89 schwarze 584: }
1.93 schwarze 585: continue;
1.137 schwarze 586: case ESCAPE_UNDEF:
587: uc = *seq;
588: break;
1.83 schwarze 589: case ESCAPE_FONTBOLD:
1.143 ! schwarze 590: case ESCAPE_FONTCB:
1.20 schwarze 591: term_fontrepl(p, TERMFONT_BOLD);
1.93 schwarze 592: continue;
1.83 schwarze 593: case ESCAPE_FONTITALIC:
1.143 ! schwarze 594: case ESCAPE_FONTCI:
1.20 schwarze 595: term_fontrepl(p, TERMFONT_UNDER);
1.93 schwarze 596: continue;
1.83 schwarze 597: case ESCAPE_FONTBI:
1.70 schwarze 598: term_fontrepl(p, TERMFONT_BI);
1.93 schwarze 599: continue;
1.83 schwarze 600: case ESCAPE_FONT:
1.143 ! schwarze 601: case ESCAPE_FONTCR:
1.83 schwarze 602: case ESCAPE_FONTROMAN:
1.20 schwarze 603: term_fontrepl(p, TERMFONT_NONE);
1.93 schwarze 604: continue;
1.83 schwarze 605: case ESCAPE_FONTPREV:
1.20 schwarze 606: term_fontlast(p);
1.130 schwarze 607: continue;
608: case ESCAPE_BREAK:
609: bufferc(p, '\n');
1.93 schwarze 610: continue;
1.83 schwarze 611: case ESCAPE_NOSPACE:
1.108 schwarze 612: if (p->flags & TERMP_BACKAFTER)
613: p->flags &= ~TERMP_BACKAFTER;
614: else if (*word == '\0')
1.97 schwarze 615: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.121 schwarze 616: continue;
1.135 schwarze 617: case ESCAPE_DEVICE:
618: if (p->type == TERMTYPE_PDF)
619: encode(p, "pdf", 3);
620: else if (p->type == TERMTYPE_PS)
621: encode(p, "ps", 2);
622: else if (p->enc == TERMENC_ASCII)
623: encode(p, "ascii", 5);
624: else
625: encode(p, "utf8", 4);
626: continue;
1.121 schwarze 627: case ESCAPE_HORIZ:
1.133 schwarze 628: if (*seq == '|') {
629: seq++;
630: uc = -p->col;
631: } else
632: uc = 0;
1.128 schwarze 633: if (a2roffsu(seq, &su, SCALE_EM) == NULL)
1.121 schwarze 634: continue;
1.133 schwarze 635: uc += term_hen(p, &su);
1.121 schwarze 636: if (uc > 0)
637: while (uc-- > 0)
638: bufferc(p, ASCII_NBRSP);
639: else if (p->col > (size_t)(-uc))
640: p->col += uc;
641: else {
642: uc += p->col;
643: p->col = 0;
1.126 schwarze 644: if (p->tcol->offset > (size_t)(-uc)) {
1.121 schwarze 645: p->ti += uc;
1.126 schwarze 646: p->tcol->offset += uc;
1.121 schwarze 647: } else {
1.126 schwarze 648: p->ti -= p->tcol->offset;
649: p->tcol->offset = 0;
1.121 schwarze 650: }
1.122 schwarze 651: }
652: continue;
653: case ESCAPE_HLINE:
1.132 schwarze 654: if ((cp = a2roffsu(seq, &su, SCALE_EM)) == NULL)
1.122 schwarze 655: continue;
1.131 schwarze 656: uc = term_hen(p, &su);
1.122 schwarze 657: if (uc <= 0) {
1.126 schwarze 658: if (p->tcol->rmargin <= p->tcol->offset)
1.122 schwarze 659: continue;
1.126 schwarze 660: lsz = p->tcol->rmargin - p->tcol->offset;
1.122 schwarze 661: } else
662: lsz = uc;
1.132 schwarze 663: if (*cp == seq[-1])
1.122 schwarze 664: uc = -1;
1.132 schwarze 665: else if (*cp == '\\') {
666: seq = cp + 1;
1.122 schwarze 667: esc = mandoc_escape(&seq, &cp, &sz);
668: switch (esc) {
669: case ESCAPE_UNICODE:
670: uc = mchars_num2uc(cp + 1, sz - 1);
671: break;
672: case ESCAPE_NUMBERED:
673: uc = mchars_num2char(cp, sz);
674: break;
675: case ESCAPE_SPECIAL:
676: uc = mchars_spec2cp(cp, sz);
677: break;
1.137 schwarze 678: case ESCAPE_UNDEF:
679: uc = *seq;
680: break;
1.122 schwarze 681: default:
682: uc = -1;
683: break;
684: }
685: } else
1.132 schwarze 686: uc = *cp;
1.122 schwarze 687: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
688: uc = '_';
689: if (p->enc == TERMENC_ASCII) {
690: cp = ascii_uc2str(uc);
691: csz = term_strlen(p, cp);
692: ssz = strlen(cp);
693: } else
694: csz = (*p->width)(p, uc);
695: while (lsz >= csz) {
696: if (p->enc == TERMENC_ASCII)
697: encode(p, cp, ssz);
698: else
699: encode1(p, uc);
700: lsz -= csz;
1.121 schwarze 701: }
1.93 schwarze 702: continue;
1.83 schwarze 703: case ESCAPE_SKIPCHAR:
1.108 schwarze 704: p->flags |= TERMP_BACKAFTER;
1.93 schwarze 705: continue;
1.103 schwarze 706: case ESCAPE_OVERSTRIKE:
707: cp = seq + sz;
708: while (seq < cp) {
709: if (*seq == '\\') {
710: mandoc_escape(&seq, NULL, NULL);
711: continue;
712: }
713: encode1(p, *seq++);
1.108 schwarze 714: if (seq < cp) {
715: if (p->flags & TERMP_BACKBEFORE)
716: p->flags |= TERMP_BACKAFTER;
717: else
718: p->flags |= TERMP_BACKBEFORE;
719: }
1.103 schwarze 720: }
1.109 schwarze 721: /* Trim trailing backspace/blank pair. */
1.129 schwarze 722: if (p->tcol->lastcol > 2 &&
723: (p->tcol->buf[p->tcol->lastcol - 1] == ' ' ||
724: p->tcol->buf[p->tcol->lastcol - 1] == '\t'))
725: p->tcol->lastcol -= 2;
726: if (p->col > p->tcol->lastcol)
727: p->col = p->tcol->lastcol;
1.108 schwarze 728: continue;
1.20 schwarze 729: default:
1.93 schwarze 730: continue;
731: }
732:
733: /*
734: * Common handling for Unicode and numbered
735: * character escape sequences.
736: */
737:
738: if (p->enc == TERMENC_ASCII) {
739: cp = ascii_uc2str(uc);
740: encode(p, cp, strlen(cp));
741: } else {
742: if ((uc < 0x20 && uc != 0x09) ||
743: (uc > 0x7E && uc < 0xA0))
744: uc = 0xFFFD;
745: encode1(p, uc);
1.20 schwarze 746: }
747: }
1.75 schwarze 748: p->flags &= ~TERMP_NBRWORD;
1.1 kristaps 749: }
750:
751: static void
1.126 schwarze 752: adjbuf(struct termp_col *c, size_t sz)
1.1 kristaps 753: {
1.126 schwarze 754: if (c->maxcols == 0)
755: c->maxcols = 1024;
756: while (c->maxcols <= sz)
757: c->maxcols <<= 2;
758: c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
1.1 kristaps 759: }
760:
1.4 schwarze 761: static void
1.20 schwarze 762: bufferc(struct termp *p, char c)
763: {
1.124 schwarze 764: if (p->flags & TERMP_NOBUF) {
765: (*p->letter)(p, c);
766: return;
767: }
1.126 schwarze 768: if (p->col + 1 >= p->tcol->maxcols)
769: adjbuf(p->tcol, p->col + 1);
1.129 schwarze 770: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.126 schwarze 771: p->tcol->buf[p->col] = c;
1.129 schwarze 772: if (p->tcol->lastcol < ++p->col)
773: p->tcol->lastcol = p->col;
1.20 schwarze 774: }
775:
1.59 schwarze 776: /*
777: * See encode().
778: * Do this for a single (probably unicode) value.
779: * Does not check for non-decorated glyphs.
780: */
781: static void
782: encode1(struct termp *p, int c)
783: {
784: enum termfont f;
785:
1.124 schwarze 786: if (p->flags & TERMP_NOBUF) {
787: (*p->letter)(p, c);
788: return;
789: }
790:
1.126 schwarze 791: if (p->col + 7 >= p->tcol->maxcols)
792: adjbuf(p->tcol, p->col + 7);
1.59 schwarze 793:
1.115 schwarze 794: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.108 schwarze 795: p->fontq[p->fonti] : TERMFONT_NONE;
1.59 schwarze 796:
1.108 schwarze 797: if (p->flags & TERMP_BACKBEFORE) {
1.126 schwarze 798: if (p->tcol->buf[p->col - 1] == ' ' ||
799: p->tcol->buf[p->col - 1] == '\t')
1.109 schwarze 800: p->col--;
801: else
1.126 schwarze 802: p->tcol->buf[p->col++] = '\b';
1.108 schwarze 803: p->flags &= ~TERMP_BACKBEFORE;
804: }
1.126 schwarze 805: if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
806: p->tcol->buf[p->col++] = '_';
807: p->tcol->buf[p->col++] = '\b';
808: }
809: if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
810: if (c == ASCII_HYPH)
811: p->tcol->buf[p->col++] = '-';
1.70 schwarze 812: else
1.126 schwarze 813: p->tcol->buf[p->col++] = c;
814: p->tcol->buf[p->col++] = '\b';
1.70 schwarze 815: }
1.129 schwarze 816: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.126 schwarze 817: p->tcol->buf[p->col] = c;
1.129 schwarze 818: if (p->tcol->lastcol < ++p->col)
819: p->tcol->lastcol = p->col;
1.108 schwarze 820: if (p->flags & TERMP_BACKAFTER) {
821: p->flags |= TERMP_BACKBEFORE;
822: p->flags &= ~TERMP_BACKAFTER;
823: }
1.59 schwarze 824: }
1.20 schwarze 825:
826: static void
827: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 828: {
1.71 schwarze 829: size_t i;
1.124 schwarze 830:
831: if (p->flags & TERMP_NOBUF) {
832: for (i = 0; i < sz; i++)
833: (*p->letter)(p, word[i]);
834: return;
835: }
1.59 schwarze 836:
1.126 schwarze 837: if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
838: adjbuf(p->tcol, p->col + 2 + (sz * 5));
1.46 schwarze 839:
1.71 schwarze 840: for (i = 0; i < sz; i++) {
1.70 schwarze 841: if (ASCII_HYPH == word[i] ||
842: isgraph((unsigned char)word[i]))
843: encode1(p, word[i]);
1.119 schwarze 844: else {
1.129 schwarze 845: if (p->tcol->lastcol <= p->col ||
1.125 schwarze 846: (word[i] != ' ' && word[i] != ASCII_NBRSP))
1.126 schwarze 847: p->tcol->buf[p->col] = word[i];
1.125 schwarze 848: p->col++;
1.119 schwarze 849:
850: /*
851: * Postpone the effect of \z while handling
852: * an overstrike sequence from ascii_uc2str().
853: */
854:
855: if (word[i] == '\b' &&
856: (p->flags & TERMP_BACKBEFORE)) {
857: p->flags &= ~TERMP_BACKBEFORE;
858: p->flags |= TERMP_BACKAFTER;
859: }
860: }
1.4 schwarze 861: }
1.129 schwarze 862: if (p->tcol->lastcol < p->col)
863: p->tcol->lastcol = p->col;
1.80 schwarze 864: }
865:
866: void
867: term_setwidth(struct termp *p, const char *wstr)
868: {
869: struct roffsu su;
1.107 schwarze 870: int iop, width;
1.80 schwarze 871:
1.81 schwarze 872: iop = 0;
873: width = 0;
1.80 schwarze 874: if (NULL != wstr) {
875: switch (*wstr) {
1.83 schwarze 876: case '+':
1.80 schwarze 877: iop = 1;
878: wstr++;
879: break;
1.83 schwarze 880: case '-':
1.80 schwarze 881: iop = -1;
882: wstr++;
883: break;
884: default:
885: break;
886: }
1.128 schwarze 887: if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
1.81 schwarze 888: width = term_hspan(p, &su);
889: else
1.80 schwarze 890: iop = 0;
891: }
892: (*p->setwidth)(p, iop, width);
1.4 schwarze 893: }
1.16 schwarze 894:
895: size_t
1.39 schwarze 896: term_len(const struct termp *p, size_t sz)
897: {
898:
1.112 schwarze 899: return (*p->width)(p, ' ') * sz;
1.39 schwarze 900: }
901:
1.64 schwarze 902: static size_t
903: cond_width(const struct termp *p, int c, int *skip)
904: {
905:
906: if (*skip) {
907: (*skip) = 0;
1.112 schwarze 908: return 0;
1.64 schwarze 909: } else
1.112 schwarze 910: return (*p->width)(p, c);
1.64 schwarze 911: }
1.39 schwarze 912:
913: size_t
914: term_strlen(const struct termp *p, const char *cp)
915: {
1.59 schwarze 916: size_t sz, rsz, i;
1.93 schwarze 917: int ssz, skip, uc;
1.50 schwarze 918: const char *seq, *rhs;
1.59 schwarze 919: enum mandoc_esc esc;
1.77 schwarze 920: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
921: ASCII_BREAK, '\0' };
1.59 schwarze 922:
923: /*
924: * Account for escaped sequences within string length
925: * calculations. This follows the logic in term_word() as we
926: * must calculate the width of produced strings.
927: */
928:
929: sz = 0;
1.64 schwarze 930: skip = 0;
1.59 schwarze 931: while ('\0' != *cp) {
932: rsz = strcspn(cp, rej);
933: for (i = 0; i < rsz; i++)
1.64 schwarze 934: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 935:
936: switch (*cp) {
1.83 schwarze 937: case '\\':
1.59 schwarze 938: cp++;
1.137 schwarze 939: rhs = NULL;
1.59 schwarze 940: esc = mandoc_escape(&cp, &seq, &ssz);
941: switch (esc) {
1.83 schwarze 942: case ESCAPE_UNICODE:
1.94 schwarze 943: uc = mchars_num2uc(seq + 1, ssz - 1);
1.59 schwarze 944: break;
1.83 schwarze 945: case ESCAPE_NUMBERED:
1.93 schwarze 946: uc = mchars_num2char(seq, ssz);
947: if (uc < 0)
948: continue;
1.50 schwarze 949: break;
1.83 schwarze 950: case ESCAPE_SPECIAL:
1.93 schwarze 951: if (p->enc == TERMENC_ASCII) {
1.114 schwarze 952: rhs = mchars_spec2str(seq, ssz, &rsz);
1.93 schwarze 953: if (rhs != NULL)
954: break;
955: } else {
1.114 schwarze 956: uc = mchars_spec2cp(seq, ssz);
1.93 schwarze 957: if (uc > 0)
958: sz += cond_width(p, uc, &skip);
1.89 schwarze 959: }
1.93 schwarze 960: continue;
1.137 schwarze 961: case ESCAPE_UNDEF:
962: uc = *seq;
963: break;
1.135 schwarze 964: case ESCAPE_DEVICE:
965: if (p->type == TERMTYPE_PDF) {
966: rhs = "pdf";
967: rsz = 3;
968: } else if (p->type == TERMTYPE_PS) {
969: rhs = "ps";
970: rsz = 2;
971: } else if (p->enc == TERMENC_ASCII) {
972: rhs = "ascii";
973: rsz = 5;
974: } else {
975: rhs = "utf8";
976: rsz = 4;
977: }
978: break;
1.83 schwarze 979: case ESCAPE_SKIPCHAR:
1.64 schwarze 980: skip = 1;
1.103 schwarze 981: continue;
982: case ESCAPE_OVERSTRIKE:
983: rsz = 0;
984: rhs = seq + ssz;
985: while (seq < rhs) {
986: if (*seq == '\\') {
987: mandoc_escape(&seq, NULL, NULL);
988: continue;
989: }
990: i = (*p->width)(p, *seq++);
991: if (rsz < i)
992: rsz = i;
993: }
994: sz += rsz;
1.93 schwarze 995: continue;
1.50 schwarze 996: default:
1.93 schwarze 997: continue;
1.50 schwarze 998: }
1.39 schwarze 999:
1.93 schwarze 1000: /*
1001: * Common handling for Unicode and numbered
1002: * character escape sequences.
1003: */
1004:
1005: if (rhs == NULL) {
1006: if (p->enc == TERMENC_ASCII) {
1007: rhs = ascii_uc2str(uc);
1008: rsz = strlen(rhs);
1009: } else {
1010: if ((uc < 0x20 && uc != 0x09) ||
1011: (uc > 0x7E && uc < 0xA0))
1012: uc = 0xFFFD;
1013: sz += cond_width(p, uc, &skip);
1014: continue;
1015: }
1016: }
1.59 schwarze 1017:
1.64 schwarze 1018: if (skip) {
1019: skip = 0;
1020: break;
1021: }
1.93 schwarze 1022:
1023: /*
1024: * Common handling for all escape sequences
1025: * printing more than one character.
1026: */
1.64 schwarze 1027:
1.59 schwarze 1028: for (i = 0; i < rsz; i++)
1029: sz += (*p->width)(p, *rhs++);
1030: break;
1.83 schwarze 1031: case ASCII_NBRSP:
1.64 schwarze 1032: sz += cond_width(p, ' ', &skip);
1.55 schwarze 1033: cp++;
1.59 schwarze 1034: break;
1.83 schwarze 1035: case ASCII_HYPH:
1.64 schwarze 1036: sz += cond_width(p, '-', &skip);
1.55 schwarze 1037: cp++;
1.59 schwarze 1038: break;
1039: default:
1040: break;
1041: }
1042: }
1.39 schwarze 1043:
1.112 schwarze 1044: return sz;
1.39 schwarze 1045: }
1046:
1.100 schwarze 1047: int
1.39 schwarze 1048: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 1049: {
1050: double r;
1.101 schwarze 1051: int ri;
1.16 schwarze 1052:
1053: switch (su->unit) {
1.99 schwarze 1054: case SCALE_BU:
1055: r = su->scale / 40.0;
1056: break;
1.83 schwarze 1057: case SCALE_CM:
1.99 schwarze 1058: r = su->scale * 6.0 / 2.54;
1059: break;
1060: case SCALE_FS:
1061: r = su->scale * 65536.0 / 40.0;
1.16 schwarze 1062: break;
1.83 schwarze 1063: case SCALE_IN:
1.86 schwarze 1064: r = su->scale * 6.0;
1.16 schwarze 1065: break;
1.99 schwarze 1066: case SCALE_MM:
1067: r = su->scale * 0.006;
1068: break;
1.83 schwarze 1069: case SCALE_PC:
1.16 schwarze 1070: r = su->scale;
1071: break;
1.83 schwarze 1072: case SCALE_PT:
1.99 schwarze 1073: r = su->scale / 12.0;
1.16 schwarze 1074: break;
1.99 schwarze 1075: case SCALE_EN:
1076: case SCALE_EM:
1077: r = su->scale * 0.6;
1.16 schwarze 1078: break;
1.83 schwarze 1079: case SCALE_VS:
1.16 schwarze 1080: r = su->scale;
1081: break;
1082: default:
1.99 schwarze 1083: abort();
1.16 schwarze 1084: }
1.101 schwarze 1085: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.112 schwarze 1086: return ri < 66 ? ri : 1;
1.16 schwarze 1087: }
1088:
1.107 schwarze 1089: /*
1.131 schwarze 1090: * Convert a scaling width to basic units, rounding towards 0.
1.107 schwarze 1091: */
1.100 schwarze 1092: int
1.39 schwarze 1093: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 1094: {
1095:
1.112 schwarze 1096: return (*p->hspan)(p, su);
1.131 schwarze 1097: }
1098:
1099: /*
1100: * Convert a scaling width to basic units, rounding to closest.
1101: */
1102: int
1103: term_hen(const struct termp *p, const struct roffsu *su)
1104: {
1105: int bu;
1106:
1107: if ((bu = (*p->hspan)(p, su)) >= 0)
1108: return (bu + 11) / 24;
1109: else
1110: return -((-bu + 11) / 24);
1.16 schwarze 1111: }
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