Annotation of mandoc/term.c, Revision 1.285
1.285 ! schwarze 1: /* $Id: term.c,v 1.284 2021/10/04 18:56:31 schwarze Exp $ */
1.1 kristaps 2: /*
1.285 ! schwarze 3: * Copyright (c) 2010-2022 Ingo Schwarze <schwarze@openbsd.org>
1.198 schwarze 4: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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 *);
1.282 schwarze 41: static void term_field(struct termp *, size_t, size_t);
1.278 schwarze 42: static void term_fill(struct termp *, size_t *, size_t *,
43: size_t);
1.11 kristaps 44:
1.222 schwarze 45:
1.145 kristaps 46: void
1.269 schwarze 47: term_setcol(struct termp *p, size_t maxtcol)
48: {
49: if (maxtcol > p->maxtcol) {
50: p->tcols = mandoc_recallocarray(p->tcols,
51: p->maxtcol, maxtcol, sizeof(*p->tcols));
52: p->maxtcol = maxtcol;
53: }
54: p->lasttcol = maxtcol - 1;
55: p->tcol = p->tcols;
56: }
57:
58: void
1.71 kristaps 59: term_free(struct termp *p)
1.14 kristaps 60: {
1.284 schwarze 61: term_tab_free();
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:
1.282 schwarze 130: vtarget = (p->flags & TERMP_NOBREAK) == 0 ? vfield :
1.278 schwarze 131: p->maxrmargin > p->viscol + vbl ?
132: p->maxrmargin - p->viscol - vbl : 0;
133:
134: /*
135: * Figure out how much text will fit in the field.
136: * If there is whitespace only, print nothing.
137: */
138:
1.282 schwarze 139: term_fill(p, &nbr, &vbr,
140: p->flags & TERMP_BRNEVER ? SIZE_MAX : vtarget);
1.278 schwarze 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:
1.282 schwarze 159: term_field(p, vbl, nbr);
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;
1.281 schwarze 284: default:
285: abort();
1.136 schwarze 286: }
1.278 schwarze 287: /* Can break at the end of a word. */
288: if (breakline || vn > vtarget)
289: break;
290: if (graph) {
291: *nbr = ic;
292: *vbr = vis;
293: graph = 0;
1.136 schwarze 294: }
1.278 schwarze 295: vis = vn;
296: continue;
297:
298: case '\n': /* Escape \p (break at the end of the word). */
299: breakline = 1;
300: continue;
1.130 kristaps 301:
1.278 schwarze 302: case ASCII_HYPH: /* Breakable hyphen. */
303: graph = 1;
1.136 schwarze 304: /*
1.278 schwarze 305: * We are about to decide whether to break the
306: * line or not, so we no longer need this hyphen
307: * to be marked as breakable. Put back a real
308: * hyphen such that we get the correct width.
1.136 schwarze 309: */
1.278 schwarze 310: p->tcol->buf[ic] = '-';
311: vis += (*p->width)(p, '-');
312: if (vis > vtarget) {
313: ic++;
314: break;
1.200 schwarze 315: }
1.278 schwarze 316: *nbr = ic + 1;
317: *vbr = vis;
318: continue;
1.200 schwarze 319:
1.278 schwarze 320: case ASCII_NBRSP: /* Non-breakable space. */
321: p->tcol->buf[ic] = ' ';
322: /* FALLTHROUGH */
323: default: /* Printable character. */
324: graph = 1;
325: vis += (*p->width)(p, p->tcol->buf[ic]);
326: if (vis > vtarget && *nbr > 0)
327: return;
328: continue;
1.136 schwarze 329: }
1.278 schwarze 330: break;
331: }
1.270 schwarze 332:
1.278 schwarze 333: /*
334: * If the last word extends to the end of the field without any
335: * trailing whitespace, the loop could not check yet whether it
336: * can remain on this line. So do the check now.
337: */
1.270 schwarze 338:
1.278 schwarze 339: if (graph && (vis <= vtarget || *nbr == 0)) {
340: *nbr = ic;
341: *vbr = vis;
342: }
343: }
1.270 schwarze 344:
1.278 schwarze 345: /*
346: * Print the contents of one field
347: * with an indentation of vbl visual columns,
1.282 schwarze 348: * and an input string length of nbr characters.
1.278 schwarze 349: */
350: static void
1.282 schwarze 351: term_field(struct termp *p, size_t vbl, size_t nbr)
1.278 schwarze 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:
1.283 schwarze 593: case ESCAPE_FONTCB:
1.125 kristaps 594: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 595: continue;
1.222 schwarze 596: case ESCAPE_FONTITALIC:
1.283 schwarze 597: case ESCAPE_FONTCI:
1.125 kristaps 598: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 599: continue;
1.222 schwarze 600: case ESCAPE_FONTBI:
1.209 schwarze 601: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 602: continue;
1.222 schwarze 603: case ESCAPE_FONT:
1.283 schwarze 604: case ESCAPE_FONTCR:
1.222 schwarze 605: case ESCAPE_FONTROMAN:
1.125 kristaps 606: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 607: continue;
1.222 schwarze 608: case ESCAPE_FONTPREV:
1.125 kristaps 609: term_fontlast(p);
1.270 schwarze 610: continue;
611: case ESCAPE_BREAK:
612: bufferc(p, '\n');
1.233 schwarze 613: continue;
1.222 schwarze 614: case ESCAPE_NOSPACE:
1.248 schwarze 615: if (p->flags & TERMP_BACKAFTER)
616: p->flags &= ~TERMP_BACKAFTER;
617: else if (*word == '\0')
1.237 schwarze 618: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.261 schwarze 619: continue;
1.275 schwarze 620: case ESCAPE_DEVICE:
621: if (p->type == TERMTYPE_PDF)
622: encode(p, "pdf", 3);
623: else if (p->type == TERMTYPE_PS)
624: encode(p, "ps", 2);
625: else if (p->enc == TERMENC_ASCII)
626: encode(p, "ascii", 5);
627: else
628: encode(p, "utf8", 4);
629: continue;
1.261 schwarze 630: case ESCAPE_HORIZ:
1.273 schwarze 631: if (*seq == '|') {
632: seq++;
633: uc = -p->col;
634: } else
635: uc = 0;
1.268 schwarze 636: if (a2roffsu(seq, &su, SCALE_EM) == NULL)
1.261 schwarze 637: continue;
1.273 schwarze 638: uc += term_hen(p, &su);
1.285 ! schwarze 639: if (uc > 0) {
! 640: while (uc > 0) {
1.261 schwarze 641: bufferc(p, ASCII_NBRSP);
1.285 ! schwarze 642: uc -= term_len(p, 1);
! 643: }
! 644: } else if (p->col > (size_t)(-uc)) {
1.261 schwarze 645: p->col += uc;
1.285 ! schwarze 646: } else {
1.261 schwarze 647: uc += p->col;
648: p->col = 0;
1.266 schwarze 649: if (p->tcol->offset > (size_t)(-uc)) {
1.261 schwarze 650: p->ti += uc;
1.266 schwarze 651: p->tcol->offset += uc;
1.261 schwarze 652: } else {
1.266 schwarze 653: p->ti -= p->tcol->offset;
654: p->tcol->offset = 0;
1.261 schwarze 655: }
1.262 schwarze 656: }
657: continue;
658: case ESCAPE_HLINE:
1.272 schwarze 659: if ((cp = a2roffsu(seq, &su, SCALE_EM)) == NULL)
1.262 schwarze 660: continue;
1.271 schwarze 661: uc = term_hen(p, &su);
1.262 schwarze 662: if (uc <= 0) {
1.266 schwarze 663: if (p->tcol->rmargin <= p->tcol->offset)
1.262 schwarze 664: continue;
1.266 schwarze 665: lsz = p->tcol->rmargin - p->tcol->offset;
1.262 schwarze 666: } else
667: lsz = uc;
1.272 schwarze 668: if (*cp == seq[-1])
1.262 schwarze 669: uc = -1;
1.272 schwarze 670: else if (*cp == '\\') {
671: seq = cp + 1;
1.262 schwarze 672: esc = mandoc_escape(&seq, &cp, &sz);
673: switch (esc) {
674: case ESCAPE_UNICODE:
675: uc = mchars_num2uc(cp + 1, sz - 1);
676: break;
677: case ESCAPE_NUMBERED:
678: uc = mchars_num2char(cp, sz);
679: break;
680: case ESCAPE_SPECIAL:
681: uc = mchars_spec2cp(cp, sz);
682: break;
1.277 schwarze 683: case ESCAPE_UNDEF:
684: uc = *seq;
685: break;
1.262 schwarze 686: default:
687: uc = -1;
688: break;
689: }
690: } else
1.272 schwarze 691: uc = *cp;
1.262 schwarze 692: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
693: uc = '_';
694: if (p->enc == TERMENC_ASCII) {
695: cp = ascii_uc2str(uc);
696: csz = term_strlen(p, cp);
697: ssz = strlen(cp);
698: } else
699: csz = (*p->width)(p, uc);
700: while (lsz >= csz) {
701: if (p->enc == TERMENC_ASCII)
702: encode(p, cp, ssz);
703: else
704: encode1(p, uc);
705: lsz -= csz;
1.261 schwarze 706: }
1.233 schwarze 707: continue;
1.222 schwarze 708: case ESCAPE_SKIPCHAR:
1.248 schwarze 709: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 710: continue;
1.243 schwarze 711: case ESCAPE_OVERSTRIKE:
712: cp = seq + sz;
713: while (seq < cp) {
714: if (*seq == '\\') {
715: mandoc_escape(&seq, NULL, NULL);
716: continue;
717: }
718: encode1(p, *seq++);
1.248 schwarze 719: if (seq < cp) {
720: if (p->flags & TERMP_BACKBEFORE)
721: p->flags |= TERMP_BACKAFTER;
722: else
723: p->flags |= TERMP_BACKBEFORE;
724: }
1.243 schwarze 725: }
1.249 schwarze 726: /* Trim trailing backspace/blank pair. */
1.269 schwarze 727: if (p->tcol->lastcol > 2 &&
728: (p->tcol->buf[p->tcol->lastcol - 1] == ' ' ||
729: p->tcol->buf[p->tcol->lastcol - 1] == '\t'))
730: p->tcol->lastcol -= 2;
731: if (p->col > p->tcol->lastcol)
732: p->col = p->tcol->lastcol;
1.248 schwarze 733: continue;
1.124 kristaps 734: default:
1.233 schwarze 735: continue;
736: }
737:
738: /*
739: * Common handling for Unicode and numbered
740: * character escape sequences.
741: */
742:
743: if (p->enc == TERMENC_ASCII) {
744: cp = ascii_uc2str(uc);
745: encode(p, cp, strlen(cp));
746: } else {
747: if ((uc < 0x20 && uc != 0x09) ||
748: (uc > 0x7E && uc < 0xA0))
749: uc = 0xFFFD;
750: encode1(p, uc);
1.124 kristaps 751: }
752: }
1.214 schwarze 753: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 754: }
755:
1.71 kristaps 756: static void
1.266 schwarze 757: adjbuf(struct termp_col *c, size_t sz)
1.51 kristaps 758: {
1.266 schwarze 759: if (c->maxcols == 0)
760: c->maxcols = 1024;
761: while (c->maxcols <= sz)
762: c->maxcols <<= 2;
763: c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
1.51 kristaps 764: }
765:
1.79 kristaps 766: static void
1.125 kristaps 767: bufferc(struct termp *p, char c)
768: {
1.264 schwarze 769: if (p->flags & TERMP_NOBUF) {
770: (*p->letter)(p, c);
771: return;
772: }
1.266 schwarze 773: if (p->col + 1 >= p->tcol->maxcols)
774: adjbuf(p->tcol, p->col + 1);
1.269 schwarze 775: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 776: p->tcol->buf[p->col] = c;
1.269 schwarze 777: if (p->tcol->lastcol < ++p->col)
778: p->tcol->lastcol = p->col;
1.125 kristaps 779: }
780:
1.194 kristaps 781: /*
782: * See encode().
783: * Do this for a single (probably unicode) value.
784: * Does not check for non-decorated glyphs.
785: */
786: static void
787: encode1(struct termp *p, int c)
788: {
789: enum termfont f;
790:
1.264 schwarze 791: if (p->flags & TERMP_NOBUF) {
792: (*p->letter)(p, c);
793: return;
794: }
795:
1.266 schwarze 796: if (p->col + 7 >= p->tcol->maxcols)
797: adjbuf(p->tcol, p->col + 7);
1.194 kristaps 798:
1.255 schwarze 799: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 800: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 801:
1.248 schwarze 802: if (p->flags & TERMP_BACKBEFORE) {
1.266 schwarze 803: if (p->tcol->buf[p->col - 1] == ' ' ||
804: p->tcol->buf[p->col - 1] == '\t')
1.249 schwarze 805: p->col--;
806: else
1.266 schwarze 807: p->tcol->buf[p->col++] = '\b';
1.248 schwarze 808: p->flags &= ~TERMP_BACKBEFORE;
809: }
1.266 schwarze 810: if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
811: p->tcol->buf[p->col++] = '_';
812: p->tcol->buf[p->col++] = '\b';
813: }
814: if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
815: if (c == ASCII_HYPH)
816: p->tcol->buf[p->col++] = '-';
1.209 schwarze 817: else
1.266 schwarze 818: p->tcol->buf[p->col++] = c;
819: p->tcol->buf[p->col++] = '\b';
1.209 schwarze 820: }
1.269 schwarze 821: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 822: p->tcol->buf[p->col] = c;
1.269 schwarze 823: if (p->tcol->lastcol < ++p->col)
824: p->tcol->lastcol = p->col;
1.248 schwarze 825: if (p->flags & TERMP_BACKAFTER) {
826: p->flags |= TERMP_BACKBEFORE;
827: p->flags &= ~TERMP_BACKAFTER;
828: }
1.194 kristaps 829: }
830:
1.125 kristaps 831: static void
832: encode(struct termp *p, const char *word, size_t sz)
833: {
1.210 schwarze 834: size_t i;
1.264 schwarze 835:
836: if (p->flags & TERMP_NOBUF) {
837: for (i = 0; i < sz; i++)
838: (*p->letter)(p, word[i]);
839: return;
840: }
1.188 kristaps 841:
1.266 schwarze 842: if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
843: adjbuf(p->tcol, p->col + 2 + (sz * 5));
1.165 kristaps 844:
1.210 schwarze 845: for (i = 0; i < sz; i++) {
1.209 schwarze 846: if (ASCII_HYPH == word[i] ||
847: isgraph((unsigned char)word[i]))
848: encode1(p, word[i]);
1.259 schwarze 849: else {
1.269 schwarze 850: if (p->tcol->lastcol <= p->col ||
1.265 schwarze 851: (word[i] != ' ' && word[i] != ASCII_NBRSP))
1.266 schwarze 852: p->tcol->buf[p->col] = word[i];
1.265 schwarze 853: p->col++;
1.259 schwarze 854:
855: /*
856: * Postpone the effect of \z while handling
857: * an overstrike sequence from ascii_uc2str().
858: */
859:
860: if (word[i] == '\b' &&
861: (p->flags & TERMP_BACKBEFORE)) {
862: p->flags &= ~TERMP_BACKBEFORE;
863: p->flags |= TERMP_BACKAFTER;
864: }
865: }
1.79 kristaps 866: }
1.269 schwarze 867: if (p->tcol->lastcol < p->col)
868: p->tcol->lastcol = p->col;
1.219 schwarze 869: }
870:
871: void
872: term_setwidth(struct termp *p, const char *wstr)
873: {
874: struct roffsu su;
1.247 schwarze 875: int iop, width;
1.219 schwarze 876:
1.220 schwarze 877: iop = 0;
878: width = 0;
1.219 schwarze 879: if (NULL != wstr) {
880: switch (*wstr) {
1.222 schwarze 881: case '+':
1.219 schwarze 882: iop = 1;
883: wstr++;
884: break;
1.222 schwarze 885: case '-':
1.219 schwarze 886: iop = -1;
887: wstr++;
888: break;
889: default:
890: break;
891: }
1.268 schwarze 892: if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
1.220 schwarze 893: width = term_hspan(p, &su);
894: else
1.219 schwarze 895: iop = 0;
896: }
897: (*p->setwidth)(p, iop, width);
1.79 kristaps 898: }
1.106 kristaps 899:
1.107 kristaps 900: size_t
1.149 kristaps 901: term_len(const struct termp *p, size_t sz)
902: {
903:
1.252 schwarze 904: return (*p->width)(p, ' ') * sz;
1.149 kristaps 905: }
906:
1.203 schwarze 907: static size_t
908: cond_width(const struct termp *p, int c, int *skip)
909: {
910:
911: if (*skip) {
912: (*skip) = 0;
1.252 schwarze 913: return 0;
1.203 schwarze 914: } else
1.252 schwarze 915: return (*p->width)(p, c);
1.203 schwarze 916: }
1.149 kristaps 917:
918: size_t
919: term_strlen(const struct termp *p, const char *cp)
920: {
1.184 kristaps 921: size_t sz, rsz, i;
1.233 schwarze 922: int ssz, skip, uc;
1.171 kristaps 923: const char *seq, *rhs;
1.196 kristaps 924: enum mandoc_esc esc;
1.216 schwarze 925: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
926: ASCII_BREAK, '\0' };
1.171 kristaps 927:
1.184 kristaps 928: /*
929: * Account for escaped sequences within string length
930: * calculations. This follows the logic in term_word() as we
931: * must calculate the width of produced strings.
932: */
933:
934: sz = 0;
1.203 schwarze 935: skip = 0;
1.189 kristaps 936: while ('\0' != *cp) {
937: rsz = strcspn(cp, rej);
938: for (i = 0; i < rsz; i++)
1.203 schwarze 939: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 940:
1.184 kristaps 941: switch (*cp) {
1.222 schwarze 942: case '\\':
1.189 kristaps 943: cp++;
1.277 schwarze 944: rhs = NULL;
1.196 kristaps 945: esc = mandoc_escape(&cp, &seq, &ssz);
946: switch (esc) {
1.222 schwarze 947: case ESCAPE_UNICODE:
1.234 schwarze 948: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 949: break;
1.222 schwarze 950: case ESCAPE_NUMBERED:
1.233 schwarze 951: uc = mchars_num2char(seq, ssz);
952: if (uc < 0)
953: continue;
1.171 kristaps 954: break;
1.222 schwarze 955: case ESCAPE_SPECIAL:
1.233 schwarze 956: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 957: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 958: if (rhs != NULL)
959: break;
960: } else {
1.254 schwarze 961: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 962: if (uc > 0)
963: sz += cond_width(p, uc, &skip);
1.229 schwarze 964: }
1.233 schwarze 965: continue;
1.277 schwarze 966: case ESCAPE_UNDEF:
967: uc = *seq;
968: break;
1.275 schwarze 969: case ESCAPE_DEVICE:
970: if (p->type == TERMTYPE_PDF) {
971: rhs = "pdf";
972: rsz = 3;
973: } else if (p->type == TERMTYPE_PS) {
974: rhs = "ps";
975: rsz = 2;
976: } else if (p->enc == TERMENC_ASCII) {
977: rhs = "ascii";
978: rsz = 5;
979: } else {
980: rhs = "utf8";
981: rsz = 4;
982: }
983: break;
1.222 schwarze 984: case ESCAPE_SKIPCHAR:
1.203 schwarze 985: skip = 1;
1.243 schwarze 986: continue;
987: case ESCAPE_OVERSTRIKE:
988: rsz = 0;
989: rhs = seq + ssz;
990: while (seq < rhs) {
991: if (*seq == '\\') {
992: mandoc_escape(&seq, NULL, NULL);
993: continue;
994: }
995: i = (*p->width)(p, *seq++);
996: if (rsz < i)
997: rsz = i;
998: }
999: sz += rsz;
1.233 schwarze 1000: continue;
1.171 kristaps 1001: default:
1.233 schwarze 1002: continue;
1.171 kristaps 1003: }
1.149 kristaps 1004:
1.233 schwarze 1005: /*
1006: * Common handling for Unicode and numbered
1007: * character escape sequences.
1008: */
1009:
1010: if (rhs == NULL) {
1011: if (p->enc == TERMENC_ASCII) {
1012: rhs = ascii_uc2str(uc);
1013: rsz = strlen(rhs);
1014: } else {
1015: if ((uc < 0x20 && uc != 0x09) ||
1016: (uc > 0x7E && uc < 0xA0))
1017: uc = 0xFFFD;
1018: sz += cond_width(p, uc, &skip);
1019: continue;
1020: }
1021: }
1.184 kristaps 1022:
1.203 schwarze 1023: if (skip) {
1024: skip = 0;
1025: break;
1026: }
1.233 schwarze 1027:
1028: /*
1029: * Common handling for all escape sequences
1030: * printing more than one character.
1031: */
1.203 schwarze 1032:
1.184 kristaps 1033: for (i = 0; i < rsz; i++)
1034: sz += (*p->width)(p, *rhs++);
1035: break;
1.222 schwarze 1036: case ASCII_NBRSP:
1.203 schwarze 1037: sz += cond_width(p, ' ', &skip);
1.176 kristaps 1038: cp++;
1.184 kristaps 1039: break;
1.222 schwarze 1040: case ASCII_HYPH:
1.203 schwarze 1041: sz += cond_width(p, '-', &skip);
1.176 kristaps 1042: cp++;
1.184 kristaps 1043: break;
1044: default:
1045: break;
1046: }
1.189 kristaps 1047: }
1.149 kristaps 1048:
1.252 schwarze 1049: return sz;
1.149 kristaps 1050: }
1051:
1.240 schwarze 1052: int
1.149 kristaps 1053: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 1054: {
1055: double r;
1.241 schwarze 1056: int ri;
1.106 kristaps 1057:
1.107 kristaps 1058: switch (su->unit) {
1.239 schwarze 1059: case SCALE_BU:
1060: r = su->scale / 40.0;
1061: break;
1.222 schwarze 1062: case SCALE_CM:
1.239 schwarze 1063: r = su->scale * 6.0 / 2.54;
1064: break;
1065: case SCALE_FS:
1066: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 1067: break;
1.222 schwarze 1068: case SCALE_IN:
1.225 schwarze 1069: r = su->scale * 6.0;
1.106 kristaps 1070: break;
1.239 schwarze 1071: case SCALE_MM:
1072: r = su->scale * 0.006;
1073: break;
1.222 schwarze 1074: case SCALE_PC:
1.107 kristaps 1075: r = su->scale;
1.106 kristaps 1076: break;
1.222 schwarze 1077: case SCALE_PT:
1.239 schwarze 1078: r = su->scale / 12.0;
1.106 kristaps 1079: break;
1.239 schwarze 1080: case SCALE_EN:
1081: case SCALE_EM:
1082: r = su->scale * 0.6;
1.106 kristaps 1083: break;
1.222 schwarze 1084: case SCALE_VS:
1.107 kristaps 1085: r = su->scale;
1.106 kristaps 1086: break;
1087: default:
1.239 schwarze 1088: abort();
1.106 kristaps 1089: }
1.241 schwarze 1090: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 1091: return ri < 66 ? ri : 1;
1.106 kristaps 1092: }
1093:
1.247 schwarze 1094: /*
1.271 schwarze 1095: * Convert a scaling width to basic units, rounding towards 0.
1.247 schwarze 1096: */
1.240 schwarze 1097: int
1.149 kristaps 1098: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 1099: {
1.108 kristaps 1100:
1.252 schwarze 1101: return (*p->hspan)(p, su);
1.271 schwarze 1102: }
1103:
1104: /*
1105: * Convert a scaling width to basic units, rounding to closest.
1106: */
1107: int
1108: term_hen(const struct termp *p, const struct roffsu *su)
1109: {
1110: int bu;
1111:
1112: if ((bu = (*p->hspan)(p, su)) >= 0)
1113: return (bu + 11) / 24;
1114: else
1115: return -((-bu + 11) / 24);
1.106 kristaps 1116: }
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