Annotation of mandoc/term.c, Revision 1.280
1.280 ! schwarze 1: /* $Id: term.c,v 1.279 2019/01/04 03:21:02 schwarze Exp $ */
1.1 kristaps 2: /*
1.198 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.278 schwarze 4: * Copyright (c) 2010-2019 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>
1.278 schwarze 24: #include <stdint.h>
1.22 kristaps 25: #include <stdio.h>
1.1 kristaps 26: #include <stdlib.h>
27: #include <string.h>
28:
1.137 kristaps 29: #include "mandoc.h"
1.218 schwarze 30: #include "mandoc_aux.h"
1.107 kristaps 31: #include "out.h"
1.71 kristaps 32: #include "term.h"
1.105 kristaps 33: #include "main.h"
1.1 kristaps 34:
1.203 schwarze 35: static size_t cond_width(const struct termp *, int, int *);
1.266 schwarze 36: static void adjbuf(struct termp_col *, size_t);
1.191 kristaps 37: static void bufferc(struct termp *, char);
38: static void encode(struct termp *, const char *, size_t);
1.194 kristaps 39: static void encode1(struct termp *, int);
1.264 schwarze 40: static void endline(struct termp *);
1.278 schwarze 41: static void term_field(struct termp *, size_t, size_t,
42: size_t, size_t);
43: static void term_fill(struct termp *, size_t *, size_t *,
44: size_t);
1.11 kristaps 45:
1.222 schwarze 46:
1.145 kristaps 47: void
1.269 schwarze 48: term_setcol(struct termp *p, size_t maxtcol)
49: {
50: if (maxtcol > p->maxtcol) {
51: p->tcols = mandoc_recallocarray(p->tcols,
52: p->maxtcol, maxtcol, sizeof(*p->tcols));
53: p->maxtcol = maxtcol;
54: }
55: p->lasttcol = maxtcol - 1;
56: p->tcol = p->tcols;
57: }
58:
59: void
1.71 kristaps 60: term_free(struct termp *p)
1.14 kristaps 61: {
1.266 schwarze 62: for (p->tcol = p->tcols; p->tcol < p->tcols + p->maxtcol; p->tcol++)
63: free(p->tcol->buf);
64: free(p->tcols);
1.238 schwarze 65: free(p->fontq);
1.142 kristaps 66: free(p);
67: }
68:
69: void
1.222 schwarze 70: term_begin(struct termp *p, term_margin head,
1.246 schwarze 71: term_margin foot, const struct roff_meta *arg)
1.142 kristaps 72: {
73:
74: p->headf = head;
75: p->footf = foot;
76: p->argf = arg;
1.146 kristaps 77: (*p->begin)(p);
1.142 kristaps 78: }
79:
80: void
81: term_end(struct termp *p)
82: {
83:
1.146 kristaps 84: (*p->end)(p);
1.14 kristaps 85: }
86:
1.71 kristaps 87: /*
1.221 schwarze 88: * Flush a chunk of text. By default, break the output line each time
89: * the right margin is reached, and continue output on the next line
90: * at the same offset as the chunk itself. By default, also break the
1.278 schwarze 91: * output line at the end of the chunk. There are many flags modifying
92: * this behaviour, see the comments in the body of the function.
1.71 kristaps 93: */
94: void
95: term_flushln(struct termp *p)
1.53 kristaps 96: {
1.278 schwarze 97: size_t vbl; /* Number of blanks to prepend to the output. */
98: size_t vbr; /* Actual visual position of the end of field. */
99: size_t vfield; /* Desired visual field width. */
100: size_t vtarget; /* Desired visual position of the right margin. */
101: size_t ic; /* Character position in the input buffer. */
102: size_t nbr; /* Number of characters to print in this field. */
103:
104: /*
105: * Normally, start writing at the left margin, but with the
106: * NOPAD flag, start writing at the current position instead.
107: */
1.53 kristaps 108:
1.266 schwarze 109: vbl = (p->flags & TERMP_NOPAD) || p->tcol->offset < p->viscol ?
110: 0 : p->tcol->offset - p->viscol;
1.263 schwarze 111: if (p->minbl && vbl < p->minbl)
112: vbl = p->minbl;
1.115 kristaps 113:
1.274 schwarze 114: if ((p->flags & TERMP_MULTICOL) == 0)
1.267 schwarze 115: p->tcol->col = 0;
1.278 schwarze 116:
117: /* Loop over output lines. */
118:
119: for (;;) {
120: vfield = p->tcol->rmargin > p->viscol + vbl ?
121: p->tcol->rmargin - p->viscol - vbl : 0;
1.267 schwarze 122:
1.71 kristaps 123: /*
1.278 schwarze 124: * Normally, break the line at the the right margin
125: * of the field, but with the NOBREAK flag, only
126: * break it at the max right margin of the screen,
127: * and with the BRNEVER flag, never break it at all.
1.138 schwarze 128: */
1.267 schwarze 129:
1.278 schwarze 130: vtarget = p->flags & TERMP_BRNEVER ? SIZE_MAX :
131: (p->flags & TERMP_NOBREAK) == 0 ? vfield :
132: p->maxrmargin > p->viscol + vbl ?
133: p->maxrmargin - p->viscol - vbl : 0;
134:
135: /*
136: * Figure out how much text will fit in the field.
137: * If there is whitespace only, print nothing.
138: */
139:
140: term_fill(p, &nbr, &vbr, vtarget);
141: if (nbr == 0)
142: break;
1.279 schwarze 143:
144: /*
145: * With the CENTER or RIGHT flag, increase the indentation
146: * to center the text between the left and right margins
147: * or to adjust it to the right margin, respectively.
148: */
149:
150: if (vbr < vtarget) {
151: if (p->flags & TERMP_CENTER)
152: vbl += (vtarget - vbr) / 2;
153: else if (p->flags & TERMP_RIGHT)
154: vbl += vtarget - vbr;
155: }
156:
157: /* Finally, print the field content. */
1.278 schwarze 158:
159: term_field(p, vbl, nbr, vbr, vtarget);
1.138 schwarze 160:
161: /*
1.278 schwarze 162: * If there is no text left in the field, exit the loop.
163: * If the BRTRSP flag is set, consider trailing
164: * whitespace significant when deciding whether
165: * the field fits or not.
1.71 kristaps 166: */
167:
1.278 schwarze 168: for (ic = p->tcol->col; ic < p->tcol->lastcol; ic++) {
169: switch (p->tcol->buf[ic]) {
170: case '\t':
171: if (p->flags & TERMP_BRTRSP)
172: vbr = term_tab_next(vbr);
173: continue;
174: case ' ':
175: if (p->flags & TERMP_BRTRSP)
176: vbr += (*p->width)(p, ' ');
1.270 schwarze 177: continue;
1.278 schwarze 178: case '\n':
179: case ASCII_BREAK:
180: continue;
181: default:
182: break;
1.270 schwarze 183: }
1.278 schwarze 184: break;
185: }
186: if (ic == p->tcol->lastcol)
187: break;
1.154 kristaps 188:
1.278 schwarze 189: /*
190: * At the location of an automtic line break, input
191: * space characters are consumed by the line break.
192: */
1.154 kristaps 193:
1.278 schwarze 194: while (p->tcol->col < p->tcol->lastcol &&
195: p->tcol->buf[p->tcol->col] == ' ')
196: p->tcol->col++;
1.154 kristaps 197:
1.278 schwarze 198: /*
199: * In multi-column mode, leave the rest of the text
200: * in the buffer to be handled by a subsequent
201: * invocation, such that the other columns of the
202: * table can be handled first.
203: * In single-column mode, simply break the line.
204: */
205:
206: if (p->flags & TERMP_MULTICOL)
207: return;
1.217 schwarze 208:
1.278 schwarze 209: endline(p);
210: p->viscol = 0;
1.53 kristaps 211:
1.71 kristaps 212: /*
1.278 schwarze 213: * Normally, start the next line at the same indentation
214: * as this one, but with the BRIND flag, start it at the
215: * right margin instead. This is used together with
216: * NOBREAK for the tags in various kinds of tagged lists.
1.81 kristaps 217: */
1.267 schwarze 218:
1.278 schwarze 219: vbl = p->flags & TERMP_BRIND ?
220: p->tcol->rmargin : p->tcol->offset;
221: }
1.267 schwarze 222:
1.278 schwarze 223: /* Reset output state in preparation for the next field. */
1.205 schwarze 224:
1.278 schwarze 225: p->col = p->tcol->col = p->tcol->lastcol = 0;
226: p->minbl = p->trailspace;
227: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD);
1.260 schwarze 228:
1.278 schwarze 229: if (p->flags & TERMP_MULTICOL)
230: return;
1.260 schwarze 231:
1.278 schwarze 232: /*
233: * The HANG flag means that the next field
234: * always follows on the same line.
235: * The NOBREAK flag means that the next field
236: * follows on the same line unless the field was overrun.
237: * Normally, break the line at the end of each field.
238: */
1.205 schwarze 239:
1.278 schwarze 240: if ((p->flags & TERMP_HANG) == 0 &&
241: ((p->flags & TERMP_NOBREAK) == 0 ||
242: vbr + term_len(p, p->trailspace) > vfield))
243: endline(p);
244: }
1.138 schwarze 245:
1.278 schwarze 246: /*
247: * Store the number of input characters to print in this field in *nbr
248: * and their total visual width to print in *vbr.
249: * If there is only whitespace in the field, both remain zero.
250: * The desired visual width of the field is provided by vtarget.
251: * If the first word is longer, the field will be overrun.
252: */
253: static void
254: term_fill(struct termp *p, size_t *nbr, size_t *vbr, size_t vtarget)
255: {
256: size_t ic; /* Character position in the input buffer. */
257: size_t vis; /* Visual position of the current character. */
258: size_t vn; /* Visual position of the next character. */
259: int breakline; /* Break at the end of this word. */
260: int graph; /* Last character was non-blank. */
261:
262: *nbr = *vbr = vis = 0;
263: breakline = graph = 0;
264: for (ic = p->tcol->col; ic < p->tcol->lastcol; ic++) {
265: switch (p->tcol->buf[ic]) {
266: case '\b': /* Escape \o (overstrike) or backspace markup. */
267: assert(ic > 0);
268: vis -= (*p->width)(p, p->tcol->buf[ic - 1]);
269: continue;
1.267 schwarze 270:
1.278 schwarze 271: case '\t': /* Normal ASCII whitespace. */
272: case ' ':
273: case ASCII_BREAK: /* Escape \: (breakpoint). */
274: switch (p->tcol->buf[ic]) {
275: case '\t':
276: vn = term_tab_next(vis);
1.140 kristaps 277: break;
1.278 schwarze 278: case ' ':
279: vn = vis + (*p->width)(p, ' ');
1.138 schwarze 280: break;
1.278 schwarze 281: case ASCII_BREAK:
282: vn = vis;
1.71 kristaps 283: break;
1.136 schwarze 284: }
1.278 schwarze 285: /* Can break at the end of a word. */
286: if (breakline || vn > vtarget)
287: break;
288: if (graph) {
289: *nbr = ic;
290: *vbr = vis;
291: graph = 0;
1.136 schwarze 292: }
1.278 schwarze 293: vis = vn;
294: continue;
295:
296: case '\n': /* Escape \p (break at the end of the word). */
297: breakline = 1;
298: continue;
1.130 kristaps 299:
1.278 schwarze 300: case ASCII_HYPH: /* Breakable hyphen. */
301: graph = 1;
1.136 schwarze 302: /*
1.278 schwarze 303: * We are about to decide whether to break the
304: * line or not, so we no longer need this hyphen
305: * to be marked as breakable. Put back a real
306: * hyphen such that we get the correct width.
1.136 schwarze 307: */
1.278 schwarze 308: p->tcol->buf[ic] = '-';
309: vis += (*p->width)(p, '-');
310: if (vis > vtarget) {
311: ic++;
312: break;
1.200 schwarze 313: }
1.278 schwarze 314: *nbr = ic + 1;
315: *vbr = vis;
316: continue;
1.200 schwarze 317:
1.278 schwarze 318: case ASCII_NBRSP: /* Non-breakable space. */
319: p->tcol->buf[ic] = ' ';
320: /* FALLTHROUGH */
321: default: /* Printable character. */
322: graph = 1;
323: vis += (*p->width)(p, p->tcol->buf[ic]);
324: if (vis > vtarget && *nbr > 0)
325: return;
326: continue;
1.136 schwarze 327: }
1.278 schwarze 328: break;
329: }
1.270 schwarze 330:
1.278 schwarze 331: /*
332: * If the last word extends to the end of the field without any
333: * trailing whitespace, the loop could not check yet whether it
334: * can remain on this line. So do the check now.
335: */
1.270 schwarze 336:
1.278 schwarze 337: if (graph && (vis <= vtarget || *nbr == 0)) {
338: *nbr = ic;
339: *vbr = vis;
340: }
341: }
1.270 schwarze 342:
1.278 schwarze 343: /*
344: * Print the contents of one field
345: * with an indentation of vbl visual columns,
346: * an input string length of nbr characters,
347: * an output width of vbr visual columns,
348: * and a desired field width of vtarget visual columns.
349: */
350: static void
351: term_field(struct termp *p, size_t vbl, size_t nbr, size_t vbr, size_t vtarget)
352: {
353: size_t ic; /* Character position in the input buffer. */
354: size_t vis; /* Visual position of the current character. */
355: size_t dv; /* Visual width of the current character. */
356: size_t vn; /* Visual position of the next character. */
1.270 schwarze 357:
1.278 schwarze 358: vis = 0;
359: for (ic = p->tcol->col; ic < nbr; ic++) {
1.270 schwarze 360:
1.278 schwarze 361: /*
362: * To avoid the printing of trailing whitespace,
363: * do not print whitespace right away, only count it.
364: */
1.270 schwarze 365:
1.278 schwarze 366: switch (p->tcol->buf[ic]) {
367: case '\n':
368: case ASCII_BREAK:
369: continue;
370: case '\t':
371: vn = term_tab_next(vis);
372: vbl += vn - vis;
373: vis = vn;
374: continue;
375: case ' ':
376: case ASCII_NBRSP:
1.280 ! schwarze 377: dv = (*p->width)(p, ' ');
! 378: vbl += dv;
! 379: vis += dv;
1.278 schwarze 380: continue;
381: default:
382: break;
383: }
1.168 schwarze 384:
1.278 schwarze 385: /*
386: * We found a non-blank character to print,
387: * so write preceding white space now.
388: */
1.267 schwarze 389:
1.278 schwarze 390: if (vbl > 0) {
391: (*p->advance)(p, vbl);
392: p->viscol += vbl;
393: vbl = 0;
394: }
1.111 kristaps 395:
1.278 schwarze 396: /* Print the character and adjust the visual position. */
1.15 kristaps 397:
1.278 schwarze 398: (*p->letter)(p, p->tcol->buf[ic]);
399: if (p->tcol->buf[ic] == '\b') {
400: dv = (*p->width)(p, p->tcol->buf[ic - 1]);
401: p->viscol -= dv;
402: vis -= dv;
403: } else {
404: dv = (*p->width)(p, p->tcol->buf[ic]);
405: p->viscol += dv;
406: vis += dv;
407: }
408: }
409: p->tcol->col = nbr;
1.264 schwarze 410: }
411:
412: static void
413: endline(struct termp *p)
414: {
415: if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) {
416: p->mc = NULL;
417: p->flags &= ~TERMP_ENDMC;
418: }
419: if (p->mc != NULL) {
420: if (p->viscol && p->maxrmargin >= p->viscol)
421: (*p->advance)(p, p->maxrmargin - p->viscol + 1);
422: p->flags |= TERMP_NOBUF | TERMP_NOSPACE;
423: term_word(p, p->mc);
424: p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC);
425: }
426: p->viscol = 0;
427: p->minbl = 0;
428: (*p->endline)(p);
1.15 kristaps 429: }
430:
1.222 schwarze 431: /*
1.71 kristaps 432: * A newline only breaks an existing line; it won't assert vertical
433: * space. All data in the output buffer is flushed prior to the newline
434: * assertion.
435: */
436: void
437: term_newln(struct termp *p)
1.15 kristaps 438: {
439:
1.71 kristaps 440: p->flags |= TERMP_NOSPACE;
1.269 schwarze 441: if (p->tcol->lastcol || p->viscol)
1.200 schwarze 442: term_flushln(p);
1.16 kristaps 443: }
444:
1.71 kristaps 445: /*
446: * Asserts a vertical space (a full, empty line-break between lines).
447: * Note that if used twice, this will cause two blank spaces and so on.
448: * All data in the output buffer is flushed prior to the newline
449: * assertion.
450: */
451: void
452: term_vspace(struct termp *p)
1.16 kristaps 453: {
454:
1.62 kristaps 455: term_newln(p);
1.139 schwarze 456: p->viscol = 0;
1.264 schwarze 457: p->minbl = 0;
1.202 schwarze 458: if (0 < p->skipvsp)
459: p->skipvsp--;
460: else
461: (*p->endline)(p);
1.16 kristaps 462: }
463:
1.238 schwarze 464: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 465: void
466: term_fontlast(struct termp *p)
467: {
468: enum termfont f;
469:
470: f = p->fontl;
471: p->fontl = p->fontq[p->fonti];
472: p->fontq[p->fonti] = f;
473: }
474:
1.238 schwarze 475: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 476: void
477: term_fontrepl(struct termp *p, enum termfont f)
478: {
479:
480: p->fontl = p->fontq[p->fonti];
481: p->fontq[p->fonti] = f;
482: }
483:
1.238 schwarze 484: /* Set font, save previous. */
1.125 kristaps 485: void
486: term_fontpush(struct termp *p, enum termfont f)
487: {
488:
489: p->fontl = p->fontq[p->fonti];
1.238 schwarze 490: if (++p->fonti == p->fontsz) {
491: p->fontsz += 8;
492: p->fontq = mandoc_reallocarray(p->fontq,
1.256 schwarze 493: p->fontsz, sizeof(*p->fontq));
1.238 schwarze 494: }
495: p->fontq[p->fonti] = f;
1.125 kristaps 496: }
497:
1.238 schwarze 498: /* Flush to make the saved pointer current again. */
1.125 kristaps 499: void
1.244 schwarze 500: term_fontpopq(struct termp *p, int i)
1.125 kristaps 501: {
502:
1.244 schwarze 503: assert(i >= 0);
504: if (p->fonti > i)
505: p->fonti = i;
1.125 kristaps 506: }
1.94 kristaps 507:
1.238 schwarze 508: /* Pop one font off the stack. */
1.125 kristaps 509: void
510: term_fontpop(struct termp *p)
511: {
512:
513: assert(p->fonti);
514: p->fonti--;
1.17 kristaps 515: }
516:
1.71 kristaps 517: /*
518: * Handle pwords, partial words, which may be either a single word or a
519: * phrase that cannot be broken down (such as a literal string). This
520: * handles word styling.
521: */
1.86 kristaps 522: void
523: term_word(struct termp *p, const char *word)
1.65 kristaps 524: {
1.261 schwarze 525: struct roffsu su;
1.214 schwarze 526: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 527: const char *seq, *cp;
1.194 kristaps 528: int sz, uc;
1.262 schwarze 529: size_t csz, lsz, ssz;
1.184 kristaps 530: enum mandoc_esc esc;
1.100 kristaps 531:
1.264 schwarze 532: if ((p->flags & TERMP_NOBUF) == 0) {
533: if ((p->flags & TERMP_NOSPACE) == 0) {
534: if ((p->flags & TERMP_KEEP) == 0) {
1.151 schwarze 535: bufferc(p, ' ');
1.264 schwarze 536: if (p->flags & TERMP_SENTENCE)
537: bufferc(p, ' ');
538: } else
539: bufferc(p, ASCII_NBRSP);
540: }
541: if (p->flags & TERMP_PREKEEP)
542: p->flags |= TERMP_KEEP;
543: if (p->flags & TERMP_NONOSPACE)
544: p->flags |= TERMP_NOSPACE;
545: else
546: p->flags &= ~TERMP_NOSPACE;
547: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
548: p->skipvsp = 0;
1.133 kristaps 549: }
1.65 kristaps 550:
1.184 kristaps 551: while ('\0' != *word) {
1.203 schwarze 552: if ('\\' != *word) {
1.214 schwarze 553: if (TERMP_NBRWORD & p->flags) {
554: if (' ' == *word) {
555: encode(p, nbrsp, 1);
556: word++;
557: continue;
558: }
559: ssz = strcspn(word, "\\ ");
560: } else
561: ssz = strcspn(word, "\\");
1.162 kristaps 562: encode(p, word, ssz);
1.203 schwarze 563: word += (int)ssz;
1.124 kristaps 564: continue;
1.203 schwarze 565: }
1.124 kristaps 566:
1.184 kristaps 567: word++;
568: esc = mandoc_escape(&word, &seq, &sz);
569: switch (esc) {
1.222 schwarze 570: case ESCAPE_UNICODE:
1.229 schwarze 571: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 572: break;
1.222 schwarze 573: case ESCAPE_NUMBERED:
1.233 schwarze 574: uc = mchars_num2char(seq, sz);
575: if (uc < 0)
576: continue;
1.184 kristaps 577: break;
1.222 schwarze 578: case ESCAPE_SPECIAL:
1.229 schwarze 579: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 580: cp = mchars_spec2str(seq, sz, &ssz);
1.232 schwarze 581: if (cp != NULL)
1.229 schwarze 582: encode(p, cp, ssz);
583: } else {
1.254 schwarze 584: uc = mchars_spec2cp(seq, sz);
1.230 schwarze 585: if (uc > 0)
586: encode1(p, uc);
1.229 schwarze 587: }
1.233 schwarze 588: continue;
1.277 schwarze 589: case ESCAPE_UNDEF:
590: uc = *seq;
591: break;
1.222 schwarze 592: case ESCAPE_FONTBOLD:
1.125 kristaps 593: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 594: continue;
1.222 schwarze 595: case ESCAPE_FONTITALIC:
1.125 kristaps 596: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 597: continue;
1.222 schwarze 598: case ESCAPE_FONTBI:
1.209 schwarze 599: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 600: continue;
1.222 schwarze 601: case ESCAPE_FONT:
1.276 schwarze 602: case ESCAPE_FONTCW:
1.222 schwarze 603: case ESCAPE_FONTROMAN:
1.125 kristaps 604: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 605: continue;
1.222 schwarze 606: case ESCAPE_FONTPREV:
1.125 kristaps 607: term_fontlast(p);
1.270 schwarze 608: continue;
609: case ESCAPE_BREAK:
610: bufferc(p, '\n');
1.233 schwarze 611: continue;
1.222 schwarze 612: case ESCAPE_NOSPACE:
1.248 schwarze 613: if (p->flags & TERMP_BACKAFTER)
614: p->flags &= ~TERMP_BACKAFTER;
615: else if (*word == '\0')
1.237 schwarze 616: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.261 schwarze 617: continue;
1.275 schwarze 618: case ESCAPE_DEVICE:
619: if (p->type == TERMTYPE_PDF)
620: encode(p, "pdf", 3);
621: else if (p->type == TERMTYPE_PS)
622: encode(p, "ps", 2);
623: else if (p->enc == TERMENC_ASCII)
624: encode(p, "ascii", 5);
625: else
626: encode(p, "utf8", 4);
627: continue;
1.261 schwarze 628: case ESCAPE_HORIZ:
1.273 schwarze 629: if (*seq == '|') {
630: seq++;
631: uc = -p->col;
632: } else
633: uc = 0;
1.268 schwarze 634: if (a2roffsu(seq, &su, SCALE_EM) == NULL)
1.261 schwarze 635: continue;
1.273 schwarze 636: uc += term_hen(p, &su);
1.261 schwarze 637: if (uc > 0)
638: while (uc-- > 0)
639: bufferc(p, ASCII_NBRSP);
640: else if (p->col > (size_t)(-uc))
641: p->col += uc;
642: else {
643: uc += p->col;
644: p->col = 0;
1.266 schwarze 645: if (p->tcol->offset > (size_t)(-uc)) {
1.261 schwarze 646: p->ti += uc;
1.266 schwarze 647: p->tcol->offset += uc;
1.261 schwarze 648: } else {
1.266 schwarze 649: p->ti -= p->tcol->offset;
650: p->tcol->offset = 0;
1.261 schwarze 651: }
1.262 schwarze 652: }
653: continue;
654: case ESCAPE_HLINE:
1.272 schwarze 655: if ((cp = a2roffsu(seq, &su, SCALE_EM)) == NULL)
1.262 schwarze 656: continue;
1.271 schwarze 657: uc = term_hen(p, &su);
1.262 schwarze 658: if (uc <= 0) {
1.266 schwarze 659: if (p->tcol->rmargin <= p->tcol->offset)
1.262 schwarze 660: continue;
1.266 schwarze 661: lsz = p->tcol->rmargin - p->tcol->offset;
1.262 schwarze 662: } else
663: lsz = uc;
1.272 schwarze 664: if (*cp == seq[-1])
1.262 schwarze 665: uc = -1;
1.272 schwarze 666: else if (*cp == '\\') {
667: seq = cp + 1;
1.262 schwarze 668: esc = mandoc_escape(&seq, &cp, &sz);
669: switch (esc) {
670: case ESCAPE_UNICODE:
671: uc = mchars_num2uc(cp + 1, sz - 1);
672: break;
673: case ESCAPE_NUMBERED:
674: uc = mchars_num2char(cp, sz);
675: break;
676: case ESCAPE_SPECIAL:
677: uc = mchars_spec2cp(cp, sz);
678: break;
1.277 schwarze 679: case ESCAPE_UNDEF:
680: uc = *seq;
681: break;
1.262 schwarze 682: default:
683: uc = -1;
684: break;
685: }
686: } else
1.272 schwarze 687: uc = *cp;
1.262 schwarze 688: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
689: uc = '_';
690: if (p->enc == TERMENC_ASCII) {
691: cp = ascii_uc2str(uc);
692: csz = term_strlen(p, cp);
693: ssz = strlen(cp);
694: } else
695: csz = (*p->width)(p, uc);
696: while (lsz >= csz) {
697: if (p->enc == TERMENC_ASCII)
698: encode(p, cp, ssz);
699: else
700: encode1(p, uc);
701: lsz -= csz;
1.261 schwarze 702: }
1.233 schwarze 703: continue;
1.222 schwarze 704: case ESCAPE_SKIPCHAR:
1.248 schwarze 705: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 706: continue;
1.243 schwarze 707: case ESCAPE_OVERSTRIKE:
708: cp = seq + sz;
709: while (seq < cp) {
710: if (*seq == '\\') {
711: mandoc_escape(&seq, NULL, NULL);
712: continue;
713: }
714: encode1(p, *seq++);
1.248 schwarze 715: if (seq < cp) {
716: if (p->flags & TERMP_BACKBEFORE)
717: p->flags |= TERMP_BACKAFTER;
718: else
719: p->flags |= TERMP_BACKBEFORE;
720: }
1.243 schwarze 721: }
1.249 schwarze 722: /* Trim trailing backspace/blank pair. */
1.269 schwarze 723: if (p->tcol->lastcol > 2 &&
724: (p->tcol->buf[p->tcol->lastcol - 1] == ' ' ||
725: p->tcol->buf[p->tcol->lastcol - 1] == '\t'))
726: p->tcol->lastcol -= 2;
727: if (p->col > p->tcol->lastcol)
728: p->col = p->tcol->lastcol;
1.248 schwarze 729: continue;
1.124 kristaps 730: default:
1.233 schwarze 731: continue;
732: }
733:
734: /*
735: * Common handling for Unicode and numbered
736: * character escape sequences.
737: */
738:
739: if (p->enc == TERMENC_ASCII) {
740: cp = ascii_uc2str(uc);
741: encode(p, cp, strlen(cp));
742: } else {
743: if ((uc < 0x20 && uc != 0x09) ||
744: (uc > 0x7E && uc < 0xA0))
745: uc = 0xFFFD;
746: encode1(p, uc);
1.124 kristaps 747: }
748: }
1.214 schwarze 749: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 750: }
751:
1.71 kristaps 752: static void
1.266 schwarze 753: adjbuf(struct termp_col *c, size_t sz)
1.51 kristaps 754: {
1.266 schwarze 755: if (c->maxcols == 0)
756: c->maxcols = 1024;
757: while (c->maxcols <= sz)
758: c->maxcols <<= 2;
759: c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
1.51 kristaps 760: }
761:
1.79 kristaps 762: static void
1.125 kristaps 763: bufferc(struct termp *p, char c)
764: {
1.264 schwarze 765: if (p->flags & TERMP_NOBUF) {
766: (*p->letter)(p, c);
767: return;
768: }
1.266 schwarze 769: if (p->col + 1 >= p->tcol->maxcols)
770: adjbuf(p->tcol, p->col + 1);
1.269 schwarze 771: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 772: p->tcol->buf[p->col] = c;
1.269 schwarze 773: if (p->tcol->lastcol < ++p->col)
774: p->tcol->lastcol = p->col;
1.125 kristaps 775: }
776:
1.194 kristaps 777: /*
778: * See encode().
779: * Do this for a single (probably unicode) value.
780: * Does not check for non-decorated glyphs.
781: */
782: static void
783: encode1(struct termp *p, int c)
784: {
785: enum termfont f;
786:
1.264 schwarze 787: if (p->flags & TERMP_NOBUF) {
788: (*p->letter)(p, c);
789: return;
790: }
791:
1.266 schwarze 792: if (p->col + 7 >= p->tcol->maxcols)
793: adjbuf(p->tcol, p->col + 7);
1.194 kristaps 794:
1.255 schwarze 795: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 796: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 797:
1.248 schwarze 798: if (p->flags & TERMP_BACKBEFORE) {
1.266 schwarze 799: if (p->tcol->buf[p->col - 1] == ' ' ||
800: p->tcol->buf[p->col - 1] == '\t')
1.249 schwarze 801: p->col--;
802: else
1.266 schwarze 803: p->tcol->buf[p->col++] = '\b';
1.248 schwarze 804: p->flags &= ~TERMP_BACKBEFORE;
805: }
1.266 schwarze 806: if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
807: p->tcol->buf[p->col++] = '_';
808: p->tcol->buf[p->col++] = '\b';
809: }
810: if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
811: if (c == ASCII_HYPH)
812: p->tcol->buf[p->col++] = '-';
1.209 schwarze 813: else
1.266 schwarze 814: p->tcol->buf[p->col++] = c;
815: p->tcol->buf[p->col++] = '\b';
1.209 schwarze 816: }
1.269 schwarze 817: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 818: p->tcol->buf[p->col] = c;
1.269 schwarze 819: if (p->tcol->lastcol < ++p->col)
820: p->tcol->lastcol = p->col;
1.248 schwarze 821: if (p->flags & TERMP_BACKAFTER) {
822: p->flags |= TERMP_BACKBEFORE;
823: p->flags &= ~TERMP_BACKAFTER;
824: }
1.194 kristaps 825: }
826:
1.125 kristaps 827: static void
828: encode(struct termp *p, const char *word, size_t sz)
829: {
1.210 schwarze 830: size_t i;
1.264 schwarze 831:
832: if (p->flags & TERMP_NOBUF) {
833: for (i = 0; i < sz; i++)
834: (*p->letter)(p, word[i]);
835: return;
836: }
1.188 kristaps 837:
1.266 schwarze 838: if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
839: adjbuf(p->tcol, p->col + 2 + (sz * 5));
1.165 kristaps 840:
1.210 schwarze 841: for (i = 0; i < sz; i++) {
1.209 schwarze 842: if (ASCII_HYPH == word[i] ||
843: isgraph((unsigned char)word[i]))
844: encode1(p, word[i]);
1.259 schwarze 845: else {
1.269 schwarze 846: if (p->tcol->lastcol <= p->col ||
1.265 schwarze 847: (word[i] != ' ' && word[i] != ASCII_NBRSP))
1.266 schwarze 848: p->tcol->buf[p->col] = word[i];
1.265 schwarze 849: p->col++;
1.259 schwarze 850:
851: /*
852: * Postpone the effect of \z while handling
853: * an overstrike sequence from ascii_uc2str().
854: */
855:
856: if (word[i] == '\b' &&
857: (p->flags & TERMP_BACKBEFORE)) {
858: p->flags &= ~TERMP_BACKBEFORE;
859: p->flags |= TERMP_BACKAFTER;
860: }
861: }
1.79 kristaps 862: }
1.269 schwarze 863: if (p->tcol->lastcol < p->col)
864: p->tcol->lastcol = p->col;
1.219 schwarze 865: }
866:
867: void
868: term_setwidth(struct termp *p, const char *wstr)
869: {
870: struct roffsu su;
1.247 schwarze 871: int iop, width;
1.219 schwarze 872:
1.220 schwarze 873: iop = 0;
874: width = 0;
1.219 schwarze 875: if (NULL != wstr) {
876: switch (*wstr) {
1.222 schwarze 877: case '+':
1.219 schwarze 878: iop = 1;
879: wstr++;
880: break;
1.222 schwarze 881: case '-':
1.219 schwarze 882: iop = -1;
883: wstr++;
884: break;
885: default:
886: break;
887: }
1.268 schwarze 888: if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
1.220 schwarze 889: width = term_hspan(p, &su);
890: else
1.219 schwarze 891: iop = 0;
892: }
893: (*p->setwidth)(p, iop, width);
1.79 kristaps 894: }
1.106 kristaps 895:
1.107 kristaps 896: size_t
1.149 kristaps 897: term_len(const struct termp *p, size_t sz)
898: {
899:
1.252 schwarze 900: return (*p->width)(p, ' ') * sz;
1.149 kristaps 901: }
902:
1.203 schwarze 903: static size_t
904: cond_width(const struct termp *p, int c, int *skip)
905: {
906:
907: if (*skip) {
908: (*skip) = 0;
1.252 schwarze 909: return 0;
1.203 schwarze 910: } else
1.252 schwarze 911: return (*p->width)(p, c);
1.203 schwarze 912: }
1.149 kristaps 913:
914: size_t
915: term_strlen(const struct termp *p, const char *cp)
916: {
1.184 kristaps 917: size_t sz, rsz, i;
1.233 schwarze 918: int ssz, skip, uc;
1.171 kristaps 919: const char *seq, *rhs;
1.196 kristaps 920: enum mandoc_esc esc;
1.216 schwarze 921: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
922: ASCII_BREAK, '\0' };
1.171 kristaps 923:
1.184 kristaps 924: /*
925: * Account for escaped sequences within string length
926: * calculations. This follows the logic in term_word() as we
927: * must calculate the width of produced strings.
928: */
929:
930: sz = 0;
1.203 schwarze 931: skip = 0;
1.189 kristaps 932: while ('\0' != *cp) {
933: rsz = strcspn(cp, rej);
934: for (i = 0; i < rsz; i++)
1.203 schwarze 935: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 936:
1.184 kristaps 937: switch (*cp) {
1.222 schwarze 938: case '\\':
1.189 kristaps 939: cp++;
1.277 schwarze 940: rhs = NULL;
1.196 kristaps 941: esc = mandoc_escape(&cp, &seq, &ssz);
942: switch (esc) {
1.222 schwarze 943: case ESCAPE_UNICODE:
1.234 schwarze 944: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 945: break;
1.222 schwarze 946: case ESCAPE_NUMBERED:
1.233 schwarze 947: uc = mchars_num2char(seq, ssz);
948: if (uc < 0)
949: continue;
1.171 kristaps 950: break;
1.222 schwarze 951: case ESCAPE_SPECIAL:
1.233 schwarze 952: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 953: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 954: if (rhs != NULL)
955: break;
956: } else {
1.254 schwarze 957: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 958: if (uc > 0)
959: sz += cond_width(p, uc, &skip);
1.229 schwarze 960: }
1.233 schwarze 961: continue;
1.277 schwarze 962: case ESCAPE_UNDEF:
963: uc = *seq;
964: break;
1.275 schwarze 965: case ESCAPE_DEVICE:
966: if (p->type == TERMTYPE_PDF) {
967: rhs = "pdf";
968: rsz = 3;
969: } else if (p->type == TERMTYPE_PS) {
970: rhs = "ps";
971: rsz = 2;
972: } else if (p->enc == TERMENC_ASCII) {
973: rhs = "ascii";
974: rsz = 5;
975: } else {
976: rhs = "utf8";
977: rsz = 4;
978: }
979: break;
1.222 schwarze 980: case ESCAPE_SKIPCHAR:
1.203 schwarze 981: skip = 1;
1.243 schwarze 982: continue;
983: case ESCAPE_OVERSTRIKE:
984: rsz = 0;
985: rhs = seq + ssz;
986: while (seq < rhs) {
987: if (*seq == '\\') {
988: mandoc_escape(&seq, NULL, NULL);
989: continue;
990: }
991: i = (*p->width)(p, *seq++);
992: if (rsz < i)
993: rsz = i;
994: }
995: sz += rsz;
1.233 schwarze 996: continue;
1.171 kristaps 997: default:
1.233 schwarze 998: continue;
1.171 kristaps 999: }
1.149 kristaps 1000:
1.233 schwarze 1001: /*
1002: * Common handling for Unicode and numbered
1003: * character escape sequences.
1004: */
1005:
1006: if (rhs == NULL) {
1007: if (p->enc == TERMENC_ASCII) {
1008: rhs = ascii_uc2str(uc);
1009: rsz = strlen(rhs);
1010: } else {
1011: if ((uc < 0x20 && uc != 0x09) ||
1012: (uc > 0x7E && uc < 0xA0))
1013: uc = 0xFFFD;
1014: sz += cond_width(p, uc, &skip);
1015: continue;
1016: }
1017: }
1.184 kristaps 1018:
1.203 schwarze 1019: if (skip) {
1020: skip = 0;
1021: break;
1022: }
1.233 schwarze 1023:
1024: /*
1025: * Common handling for all escape sequences
1026: * printing more than one character.
1027: */
1.203 schwarze 1028:
1.184 kristaps 1029: for (i = 0; i < rsz; i++)
1030: sz += (*p->width)(p, *rhs++);
1031: break;
1.222 schwarze 1032: case ASCII_NBRSP:
1.203 schwarze 1033: sz += cond_width(p, ' ', &skip);
1.176 kristaps 1034: cp++;
1.184 kristaps 1035: break;
1.222 schwarze 1036: case ASCII_HYPH:
1.203 schwarze 1037: sz += cond_width(p, '-', &skip);
1.176 kristaps 1038: cp++;
1.184 kristaps 1039: break;
1040: default:
1041: break;
1042: }
1.189 kristaps 1043: }
1.149 kristaps 1044:
1.252 schwarze 1045: return sz;
1.149 kristaps 1046: }
1047:
1.240 schwarze 1048: int
1.149 kristaps 1049: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 1050: {
1051: double r;
1.241 schwarze 1052: int ri;
1.106 kristaps 1053:
1.107 kristaps 1054: switch (su->unit) {
1.239 schwarze 1055: case SCALE_BU:
1056: r = su->scale / 40.0;
1057: break;
1.222 schwarze 1058: case SCALE_CM:
1.239 schwarze 1059: r = su->scale * 6.0 / 2.54;
1060: break;
1061: case SCALE_FS:
1062: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 1063: break;
1.222 schwarze 1064: case SCALE_IN:
1.225 schwarze 1065: r = su->scale * 6.0;
1.106 kristaps 1066: break;
1.239 schwarze 1067: case SCALE_MM:
1068: r = su->scale * 0.006;
1069: break;
1.222 schwarze 1070: case SCALE_PC:
1.107 kristaps 1071: r = su->scale;
1.106 kristaps 1072: break;
1.222 schwarze 1073: case SCALE_PT:
1.239 schwarze 1074: r = su->scale / 12.0;
1.106 kristaps 1075: break;
1.239 schwarze 1076: case SCALE_EN:
1077: case SCALE_EM:
1078: r = su->scale * 0.6;
1.106 kristaps 1079: break;
1.222 schwarze 1080: case SCALE_VS:
1.107 kristaps 1081: r = su->scale;
1.106 kristaps 1082: break;
1083: default:
1.239 schwarze 1084: abort();
1.106 kristaps 1085: }
1.241 schwarze 1086: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 1087: return ri < 66 ? ri : 1;
1.106 kristaps 1088: }
1089:
1.247 schwarze 1090: /*
1.271 schwarze 1091: * Convert a scaling width to basic units, rounding towards 0.
1.247 schwarze 1092: */
1.240 schwarze 1093: int
1.149 kristaps 1094: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 1095: {
1.108 kristaps 1096:
1.252 schwarze 1097: return (*p->hspan)(p, su);
1.271 schwarze 1098: }
1099:
1100: /*
1101: * Convert a scaling width to basic units, rounding to closest.
1102: */
1103: int
1104: term_hen(const struct termp *p, const struct roffsu *su)
1105: {
1106: int bu;
1107:
1108: if ((bu = (*p->hspan)(p, su)) >= 0)
1109: return (bu + 11) / 24;
1110: else
1111: return -((-bu + 11) / 24);
1.106 kristaps 1112: }
CVSweb