Annotation of mandoc/term.c, Revision 1.281
1.281 ! schwarze 1: /* $Id: term.c,v 1.280 2019/01/15 12:16:18 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;
1.281 ! 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,
348: * an input string length of nbr characters,
349: * an output width of vbr visual columns,
350: * and a desired field width of vtarget visual columns.
351: */
352: static void
353: term_field(struct termp *p, size_t vbl, size_t nbr, size_t vbr, size_t vtarget)
354: {
355: size_t ic; /* Character position in the input buffer. */
356: size_t vis; /* Visual position of the current character. */
357: size_t dv; /* Visual width of the current character. */
358: size_t vn; /* Visual position of the next character. */
1.270 schwarze 359:
1.278 schwarze 360: vis = 0;
361: for (ic = p->tcol->col; ic < nbr; ic++) {
1.270 schwarze 362:
1.278 schwarze 363: /*
364: * To avoid the printing of trailing whitespace,
365: * do not print whitespace right away, only count it.
366: */
1.270 schwarze 367:
1.278 schwarze 368: switch (p->tcol->buf[ic]) {
369: case '\n':
370: case ASCII_BREAK:
371: continue;
372: case '\t':
373: vn = term_tab_next(vis);
374: vbl += vn - vis;
375: vis = vn;
376: continue;
377: case ' ':
378: case ASCII_NBRSP:
1.280 schwarze 379: dv = (*p->width)(p, ' ');
380: vbl += dv;
381: vis += dv;
1.278 schwarze 382: continue;
383: default:
384: break;
385: }
1.168 schwarze 386:
1.278 schwarze 387: /*
388: * We found a non-blank character to print,
389: * so write preceding white space now.
390: */
1.267 schwarze 391:
1.278 schwarze 392: if (vbl > 0) {
393: (*p->advance)(p, vbl);
394: p->viscol += vbl;
395: vbl = 0;
396: }
1.111 kristaps 397:
1.278 schwarze 398: /* Print the character and adjust the visual position. */
1.15 kristaps 399:
1.278 schwarze 400: (*p->letter)(p, p->tcol->buf[ic]);
401: if (p->tcol->buf[ic] == '\b') {
402: dv = (*p->width)(p, p->tcol->buf[ic - 1]);
403: p->viscol -= dv;
404: vis -= dv;
405: } else {
406: dv = (*p->width)(p, p->tcol->buf[ic]);
407: p->viscol += dv;
408: vis += dv;
409: }
410: }
411: p->tcol->col = nbr;
1.264 schwarze 412: }
413:
414: static void
415: endline(struct termp *p)
416: {
417: if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) {
418: p->mc = NULL;
419: p->flags &= ~TERMP_ENDMC;
420: }
421: if (p->mc != NULL) {
422: if (p->viscol && p->maxrmargin >= p->viscol)
423: (*p->advance)(p, p->maxrmargin - p->viscol + 1);
424: p->flags |= TERMP_NOBUF | TERMP_NOSPACE;
425: term_word(p, p->mc);
426: p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC);
427: }
428: p->viscol = 0;
429: p->minbl = 0;
430: (*p->endline)(p);
1.15 kristaps 431: }
432:
1.222 schwarze 433: /*
1.71 kristaps 434: * A newline only breaks an existing line; it won't assert vertical
435: * space. All data in the output buffer is flushed prior to the newline
436: * assertion.
437: */
438: void
439: term_newln(struct termp *p)
1.15 kristaps 440: {
441:
1.71 kristaps 442: p->flags |= TERMP_NOSPACE;
1.269 schwarze 443: if (p->tcol->lastcol || p->viscol)
1.200 schwarze 444: term_flushln(p);
1.16 kristaps 445: }
446:
1.71 kristaps 447: /*
448: * Asserts a vertical space (a full, empty line-break between lines).
449: * Note that if used twice, this will cause two blank spaces and so on.
450: * All data in the output buffer is flushed prior to the newline
451: * assertion.
452: */
453: void
454: term_vspace(struct termp *p)
1.16 kristaps 455: {
456:
1.62 kristaps 457: term_newln(p);
1.139 schwarze 458: p->viscol = 0;
1.264 schwarze 459: p->minbl = 0;
1.202 schwarze 460: if (0 < p->skipvsp)
461: p->skipvsp--;
462: else
463: (*p->endline)(p);
1.16 kristaps 464: }
465:
1.238 schwarze 466: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 467: void
468: term_fontlast(struct termp *p)
469: {
470: enum termfont f;
471:
472: f = p->fontl;
473: p->fontl = p->fontq[p->fonti];
474: p->fontq[p->fonti] = f;
475: }
476:
1.238 schwarze 477: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 478: void
479: term_fontrepl(struct termp *p, enum termfont f)
480: {
481:
482: p->fontl = p->fontq[p->fonti];
483: p->fontq[p->fonti] = f;
484: }
485:
1.238 schwarze 486: /* Set font, save previous. */
1.125 kristaps 487: void
488: term_fontpush(struct termp *p, enum termfont f)
489: {
490:
491: p->fontl = p->fontq[p->fonti];
1.238 schwarze 492: if (++p->fonti == p->fontsz) {
493: p->fontsz += 8;
494: p->fontq = mandoc_reallocarray(p->fontq,
1.256 schwarze 495: p->fontsz, sizeof(*p->fontq));
1.238 schwarze 496: }
497: p->fontq[p->fonti] = f;
1.125 kristaps 498: }
499:
1.238 schwarze 500: /* Flush to make the saved pointer current again. */
1.125 kristaps 501: void
1.244 schwarze 502: term_fontpopq(struct termp *p, int i)
1.125 kristaps 503: {
504:
1.244 schwarze 505: assert(i >= 0);
506: if (p->fonti > i)
507: p->fonti = i;
1.125 kristaps 508: }
1.94 kristaps 509:
1.238 schwarze 510: /* Pop one font off the stack. */
1.125 kristaps 511: void
512: term_fontpop(struct termp *p)
513: {
514:
515: assert(p->fonti);
516: p->fonti--;
1.17 kristaps 517: }
518:
1.71 kristaps 519: /*
520: * Handle pwords, partial words, which may be either a single word or a
521: * phrase that cannot be broken down (such as a literal string). This
522: * handles word styling.
523: */
1.86 kristaps 524: void
525: term_word(struct termp *p, const char *word)
1.65 kristaps 526: {
1.261 schwarze 527: struct roffsu su;
1.214 schwarze 528: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 529: const char *seq, *cp;
1.194 kristaps 530: int sz, uc;
1.262 schwarze 531: size_t csz, lsz, ssz;
1.184 kristaps 532: enum mandoc_esc esc;
1.100 kristaps 533:
1.264 schwarze 534: if ((p->flags & TERMP_NOBUF) == 0) {
535: if ((p->flags & TERMP_NOSPACE) == 0) {
536: if ((p->flags & TERMP_KEEP) == 0) {
1.151 schwarze 537: bufferc(p, ' ');
1.264 schwarze 538: if (p->flags & TERMP_SENTENCE)
539: bufferc(p, ' ');
540: } else
541: bufferc(p, ASCII_NBRSP);
542: }
543: if (p->flags & TERMP_PREKEEP)
544: p->flags |= TERMP_KEEP;
545: if (p->flags & TERMP_NONOSPACE)
546: p->flags |= TERMP_NOSPACE;
547: else
548: p->flags &= ~TERMP_NOSPACE;
549: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
550: p->skipvsp = 0;
1.133 kristaps 551: }
1.65 kristaps 552:
1.184 kristaps 553: while ('\0' != *word) {
1.203 schwarze 554: if ('\\' != *word) {
1.214 schwarze 555: if (TERMP_NBRWORD & p->flags) {
556: if (' ' == *word) {
557: encode(p, nbrsp, 1);
558: word++;
559: continue;
560: }
561: ssz = strcspn(word, "\\ ");
562: } else
563: ssz = strcspn(word, "\\");
1.162 kristaps 564: encode(p, word, ssz);
1.203 schwarze 565: word += (int)ssz;
1.124 kristaps 566: continue;
1.203 schwarze 567: }
1.124 kristaps 568:
1.184 kristaps 569: word++;
570: esc = mandoc_escape(&word, &seq, &sz);
571: switch (esc) {
1.222 schwarze 572: case ESCAPE_UNICODE:
1.229 schwarze 573: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 574: break;
1.222 schwarze 575: case ESCAPE_NUMBERED:
1.233 schwarze 576: uc = mchars_num2char(seq, sz);
577: if (uc < 0)
578: continue;
1.184 kristaps 579: break;
1.222 schwarze 580: case ESCAPE_SPECIAL:
1.229 schwarze 581: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 582: cp = mchars_spec2str(seq, sz, &ssz);
1.232 schwarze 583: if (cp != NULL)
1.229 schwarze 584: encode(p, cp, ssz);
585: } else {
1.254 schwarze 586: uc = mchars_spec2cp(seq, sz);
1.230 schwarze 587: if (uc > 0)
588: encode1(p, uc);
1.229 schwarze 589: }
1.233 schwarze 590: continue;
1.277 schwarze 591: case ESCAPE_UNDEF:
592: uc = *seq;
593: break;
1.222 schwarze 594: case ESCAPE_FONTBOLD:
1.125 kristaps 595: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 596: continue;
1.222 schwarze 597: case ESCAPE_FONTITALIC:
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:
1.276 schwarze 604: case ESCAPE_FONTCW:
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);
1.261 schwarze 639: if (uc > 0)
640: while (uc-- > 0)
641: bufferc(p, ASCII_NBRSP);
642: else if (p->col > (size_t)(-uc))
643: p->col += uc;
644: else {
645: uc += p->col;
646: p->col = 0;
1.266 schwarze 647: if (p->tcol->offset > (size_t)(-uc)) {
1.261 schwarze 648: p->ti += uc;
1.266 schwarze 649: p->tcol->offset += uc;
1.261 schwarze 650: } else {
1.266 schwarze 651: p->ti -= p->tcol->offset;
652: p->tcol->offset = 0;
1.261 schwarze 653: }
1.262 schwarze 654: }
655: continue;
656: case ESCAPE_HLINE:
1.272 schwarze 657: if ((cp = a2roffsu(seq, &su, SCALE_EM)) == NULL)
1.262 schwarze 658: continue;
1.271 schwarze 659: uc = term_hen(p, &su);
1.262 schwarze 660: if (uc <= 0) {
1.266 schwarze 661: if (p->tcol->rmargin <= p->tcol->offset)
1.262 schwarze 662: continue;
1.266 schwarze 663: lsz = p->tcol->rmargin - p->tcol->offset;
1.262 schwarze 664: } else
665: lsz = uc;
1.272 schwarze 666: if (*cp == seq[-1])
1.262 schwarze 667: uc = -1;
1.272 schwarze 668: else if (*cp == '\\') {
669: seq = cp + 1;
1.262 schwarze 670: esc = mandoc_escape(&seq, &cp, &sz);
671: switch (esc) {
672: case ESCAPE_UNICODE:
673: uc = mchars_num2uc(cp + 1, sz - 1);
674: break;
675: case ESCAPE_NUMBERED:
676: uc = mchars_num2char(cp, sz);
677: break;
678: case ESCAPE_SPECIAL:
679: uc = mchars_spec2cp(cp, sz);
680: break;
1.277 schwarze 681: case ESCAPE_UNDEF:
682: uc = *seq;
683: break;
1.262 schwarze 684: default:
685: uc = -1;
686: break;
687: }
688: } else
1.272 schwarze 689: uc = *cp;
1.262 schwarze 690: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
691: uc = '_';
692: if (p->enc == TERMENC_ASCII) {
693: cp = ascii_uc2str(uc);
694: csz = term_strlen(p, cp);
695: ssz = strlen(cp);
696: } else
697: csz = (*p->width)(p, uc);
698: while (lsz >= csz) {
699: if (p->enc == TERMENC_ASCII)
700: encode(p, cp, ssz);
701: else
702: encode1(p, uc);
703: lsz -= csz;
1.261 schwarze 704: }
1.233 schwarze 705: continue;
1.222 schwarze 706: case ESCAPE_SKIPCHAR:
1.248 schwarze 707: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 708: continue;
1.243 schwarze 709: case ESCAPE_OVERSTRIKE:
710: cp = seq + sz;
711: while (seq < cp) {
712: if (*seq == '\\') {
713: mandoc_escape(&seq, NULL, NULL);
714: continue;
715: }
716: encode1(p, *seq++);
1.248 schwarze 717: if (seq < cp) {
718: if (p->flags & TERMP_BACKBEFORE)
719: p->flags |= TERMP_BACKAFTER;
720: else
721: p->flags |= TERMP_BACKBEFORE;
722: }
1.243 schwarze 723: }
1.249 schwarze 724: /* Trim trailing backspace/blank pair. */
1.269 schwarze 725: if (p->tcol->lastcol > 2 &&
726: (p->tcol->buf[p->tcol->lastcol - 1] == ' ' ||
727: p->tcol->buf[p->tcol->lastcol - 1] == '\t'))
728: p->tcol->lastcol -= 2;
729: if (p->col > p->tcol->lastcol)
730: p->col = p->tcol->lastcol;
1.248 schwarze 731: continue;
1.124 kristaps 732: default:
1.233 schwarze 733: continue;
734: }
735:
736: /*
737: * Common handling for Unicode and numbered
738: * character escape sequences.
739: */
740:
741: if (p->enc == TERMENC_ASCII) {
742: cp = ascii_uc2str(uc);
743: encode(p, cp, strlen(cp));
744: } else {
745: if ((uc < 0x20 && uc != 0x09) ||
746: (uc > 0x7E && uc < 0xA0))
747: uc = 0xFFFD;
748: encode1(p, uc);
1.124 kristaps 749: }
750: }
1.214 schwarze 751: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 752: }
753:
1.71 kristaps 754: static void
1.266 schwarze 755: adjbuf(struct termp_col *c, size_t sz)
1.51 kristaps 756: {
1.266 schwarze 757: if (c->maxcols == 0)
758: c->maxcols = 1024;
759: while (c->maxcols <= sz)
760: c->maxcols <<= 2;
761: c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
1.51 kristaps 762: }
763:
1.79 kristaps 764: static void
1.125 kristaps 765: bufferc(struct termp *p, char c)
766: {
1.264 schwarze 767: if (p->flags & TERMP_NOBUF) {
768: (*p->letter)(p, c);
769: return;
770: }
1.266 schwarze 771: if (p->col + 1 >= p->tcol->maxcols)
772: adjbuf(p->tcol, p->col + 1);
1.269 schwarze 773: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 774: p->tcol->buf[p->col] = c;
1.269 schwarze 775: if (p->tcol->lastcol < ++p->col)
776: p->tcol->lastcol = p->col;
1.125 kristaps 777: }
778:
1.194 kristaps 779: /*
780: * See encode().
781: * Do this for a single (probably unicode) value.
782: * Does not check for non-decorated glyphs.
783: */
784: static void
785: encode1(struct termp *p, int c)
786: {
787: enum termfont f;
788:
1.264 schwarze 789: if (p->flags & TERMP_NOBUF) {
790: (*p->letter)(p, c);
791: return;
792: }
793:
1.266 schwarze 794: if (p->col + 7 >= p->tcol->maxcols)
795: adjbuf(p->tcol, p->col + 7);
1.194 kristaps 796:
1.255 schwarze 797: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 798: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 799:
1.248 schwarze 800: if (p->flags & TERMP_BACKBEFORE) {
1.266 schwarze 801: if (p->tcol->buf[p->col - 1] == ' ' ||
802: p->tcol->buf[p->col - 1] == '\t')
1.249 schwarze 803: p->col--;
804: else
1.266 schwarze 805: p->tcol->buf[p->col++] = '\b';
1.248 schwarze 806: p->flags &= ~TERMP_BACKBEFORE;
807: }
1.266 schwarze 808: if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
809: p->tcol->buf[p->col++] = '_';
810: p->tcol->buf[p->col++] = '\b';
811: }
812: if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
813: if (c == ASCII_HYPH)
814: p->tcol->buf[p->col++] = '-';
1.209 schwarze 815: else
1.266 schwarze 816: p->tcol->buf[p->col++] = c;
817: p->tcol->buf[p->col++] = '\b';
1.209 schwarze 818: }
1.269 schwarze 819: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 820: p->tcol->buf[p->col] = c;
1.269 schwarze 821: if (p->tcol->lastcol < ++p->col)
822: p->tcol->lastcol = p->col;
1.248 schwarze 823: if (p->flags & TERMP_BACKAFTER) {
824: p->flags |= TERMP_BACKBEFORE;
825: p->flags &= ~TERMP_BACKAFTER;
826: }
1.194 kristaps 827: }
828:
1.125 kristaps 829: static void
830: encode(struct termp *p, const char *word, size_t sz)
831: {
1.210 schwarze 832: size_t i;
1.264 schwarze 833:
834: if (p->flags & TERMP_NOBUF) {
835: for (i = 0; i < sz; i++)
836: (*p->letter)(p, word[i]);
837: return;
838: }
1.188 kristaps 839:
1.266 schwarze 840: if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
841: adjbuf(p->tcol, p->col + 2 + (sz * 5));
1.165 kristaps 842:
1.210 schwarze 843: for (i = 0; i < sz; i++) {
1.209 schwarze 844: if (ASCII_HYPH == word[i] ||
845: isgraph((unsigned char)word[i]))
846: encode1(p, word[i]);
1.259 schwarze 847: else {
1.269 schwarze 848: if (p->tcol->lastcol <= p->col ||
1.265 schwarze 849: (word[i] != ' ' && word[i] != ASCII_NBRSP))
1.266 schwarze 850: p->tcol->buf[p->col] = word[i];
1.265 schwarze 851: p->col++;
1.259 schwarze 852:
853: /*
854: * Postpone the effect of \z while handling
855: * an overstrike sequence from ascii_uc2str().
856: */
857:
858: if (word[i] == '\b' &&
859: (p->flags & TERMP_BACKBEFORE)) {
860: p->flags &= ~TERMP_BACKBEFORE;
861: p->flags |= TERMP_BACKAFTER;
862: }
863: }
1.79 kristaps 864: }
1.269 schwarze 865: if (p->tcol->lastcol < p->col)
866: p->tcol->lastcol = p->col;
1.219 schwarze 867: }
868:
869: void
870: term_setwidth(struct termp *p, const char *wstr)
871: {
872: struct roffsu su;
1.247 schwarze 873: int iop, width;
1.219 schwarze 874:
1.220 schwarze 875: iop = 0;
876: width = 0;
1.219 schwarze 877: if (NULL != wstr) {
878: switch (*wstr) {
1.222 schwarze 879: case '+':
1.219 schwarze 880: iop = 1;
881: wstr++;
882: break;
1.222 schwarze 883: case '-':
1.219 schwarze 884: iop = -1;
885: wstr++;
886: break;
887: default:
888: break;
889: }
1.268 schwarze 890: if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
1.220 schwarze 891: width = term_hspan(p, &su);
892: else
1.219 schwarze 893: iop = 0;
894: }
895: (*p->setwidth)(p, iop, width);
1.79 kristaps 896: }
1.106 kristaps 897:
1.107 kristaps 898: size_t
1.149 kristaps 899: term_len(const struct termp *p, size_t sz)
900: {
901:
1.252 schwarze 902: return (*p->width)(p, ' ') * sz;
1.149 kristaps 903: }
904:
1.203 schwarze 905: static size_t
906: cond_width(const struct termp *p, int c, int *skip)
907: {
908:
909: if (*skip) {
910: (*skip) = 0;
1.252 schwarze 911: return 0;
1.203 schwarze 912: } else
1.252 schwarze 913: return (*p->width)(p, c);
1.203 schwarze 914: }
1.149 kristaps 915:
916: size_t
917: term_strlen(const struct termp *p, const char *cp)
918: {
1.184 kristaps 919: size_t sz, rsz, i;
1.233 schwarze 920: int ssz, skip, uc;
1.171 kristaps 921: const char *seq, *rhs;
1.196 kristaps 922: enum mandoc_esc esc;
1.216 schwarze 923: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
924: ASCII_BREAK, '\0' };
1.171 kristaps 925:
1.184 kristaps 926: /*
927: * Account for escaped sequences within string length
928: * calculations. This follows the logic in term_word() as we
929: * must calculate the width of produced strings.
930: */
931:
932: sz = 0;
1.203 schwarze 933: skip = 0;
1.189 kristaps 934: while ('\0' != *cp) {
935: rsz = strcspn(cp, rej);
936: for (i = 0; i < rsz; i++)
1.203 schwarze 937: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 938:
1.184 kristaps 939: switch (*cp) {
1.222 schwarze 940: case '\\':
1.189 kristaps 941: cp++;
1.277 schwarze 942: rhs = NULL;
1.196 kristaps 943: esc = mandoc_escape(&cp, &seq, &ssz);
944: switch (esc) {
1.222 schwarze 945: case ESCAPE_UNICODE:
1.234 schwarze 946: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 947: break;
1.222 schwarze 948: case ESCAPE_NUMBERED:
1.233 schwarze 949: uc = mchars_num2char(seq, ssz);
950: if (uc < 0)
951: continue;
1.171 kristaps 952: break;
1.222 schwarze 953: case ESCAPE_SPECIAL:
1.233 schwarze 954: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 955: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 956: if (rhs != NULL)
957: break;
958: } else {
1.254 schwarze 959: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 960: if (uc > 0)
961: sz += cond_width(p, uc, &skip);
1.229 schwarze 962: }
1.233 schwarze 963: continue;
1.277 schwarze 964: case ESCAPE_UNDEF:
965: uc = *seq;
966: break;
1.275 schwarze 967: case ESCAPE_DEVICE:
968: if (p->type == TERMTYPE_PDF) {
969: rhs = "pdf";
970: rsz = 3;
971: } else if (p->type == TERMTYPE_PS) {
972: rhs = "ps";
973: rsz = 2;
974: } else if (p->enc == TERMENC_ASCII) {
975: rhs = "ascii";
976: rsz = 5;
977: } else {
978: rhs = "utf8";
979: rsz = 4;
980: }
981: break;
1.222 schwarze 982: case ESCAPE_SKIPCHAR:
1.203 schwarze 983: skip = 1;
1.243 schwarze 984: continue;
985: case ESCAPE_OVERSTRIKE:
986: rsz = 0;
987: rhs = seq + ssz;
988: while (seq < rhs) {
989: if (*seq == '\\') {
990: mandoc_escape(&seq, NULL, NULL);
991: continue;
992: }
993: i = (*p->width)(p, *seq++);
994: if (rsz < i)
995: rsz = i;
996: }
997: sz += rsz;
1.233 schwarze 998: continue;
1.171 kristaps 999: default:
1.233 schwarze 1000: continue;
1.171 kristaps 1001: }
1.149 kristaps 1002:
1.233 schwarze 1003: /*
1004: * Common handling for Unicode and numbered
1005: * character escape sequences.
1006: */
1007:
1008: if (rhs == NULL) {
1009: if (p->enc == TERMENC_ASCII) {
1010: rhs = ascii_uc2str(uc);
1011: rsz = strlen(rhs);
1012: } else {
1013: if ((uc < 0x20 && uc != 0x09) ||
1014: (uc > 0x7E && uc < 0xA0))
1015: uc = 0xFFFD;
1016: sz += cond_width(p, uc, &skip);
1017: continue;
1018: }
1019: }
1.184 kristaps 1020:
1.203 schwarze 1021: if (skip) {
1022: skip = 0;
1023: break;
1024: }
1.233 schwarze 1025:
1026: /*
1027: * Common handling for all escape sequences
1028: * printing more than one character.
1029: */
1.203 schwarze 1030:
1.184 kristaps 1031: for (i = 0; i < rsz; i++)
1032: sz += (*p->width)(p, *rhs++);
1033: break;
1.222 schwarze 1034: case ASCII_NBRSP:
1.203 schwarze 1035: sz += cond_width(p, ' ', &skip);
1.176 kristaps 1036: cp++;
1.184 kristaps 1037: break;
1.222 schwarze 1038: case ASCII_HYPH:
1.203 schwarze 1039: sz += cond_width(p, '-', &skip);
1.176 kristaps 1040: cp++;
1.184 kristaps 1041: break;
1042: default:
1043: break;
1044: }
1.189 kristaps 1045: }
1.149 kristaps 1046:
1.252 schwarze 1047: return sz;
1.149 kristaps 1048: }
1049:
1.240 schwarze 1050: int
1.149 kristaps 1051: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 1052: {
1053: double r;
1.241 schwarze 1054: int ri;
1.106 kristaps 1055:
1.107 kristaps 1056: switch (su->unit) {
1.239 schwarze 1057: case SCALE_BU:
1058: r = su->scale / 40.0;
1059: break;
1.222 schwarze 1060: case SCALE_CM:
1.239 schwarze 1061: r = su->scale * 6.0 / 2.54;
1062: break;
1063: case SCALE_FS:
1064: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 1065: break;
1.222 schwarze 1066: case SCALE_IN:
1.225 schwarze 1067: r = su->scale * 6.0;
1.106 kristaps 1068: break;
1.239 schwarze 1069: case SCALE_MM:
1070: r = su->scale * 0.006;
1071: break;
1.222 schwarze 1072: case SCALE_PC:
1.107 kristaps 1073: r = su->scale;
1.106 kristaps 1074: break;
1.222 schwarze 1075: case SCALE_PT:
1.239 schwarze 1076: r = su->scale / 12.0;
1.106 kristaps 1077: break;
1.239 schwarze 1078: case SCALE_EN:
1079: case SCALE_EM:
1080: r = su->scale * 0.6;
1.106 kristaps 1081: break;
1.222 schwarze 1082: case SCALE_VS:
1.107 kristaps 1083: r = su->scale;
1.106 kristaps 1084: break;
1085: default:
1.239 schwarze 1086: abort();
1.106 kristaps 1087: }
1.241 schwarze 1088: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 1089: return ri < 66 ? ri : 1;
1.106 kristaps 1090: }
1091:
1.247 schwarze 1092: /*
1.271 schwarze 1093: * Convert a scaling width to basic units, rounding towards 0.
1.247 schwarze 1094: */
1.240 schwarze 1095: int
1.149 kristaps 1096: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 1097: {
1.108 kristaps 1098:
1.252 schwarze 1099: return (*p->hspan)(p, su);
1.271 schwarze 1100: }
1101:
1102: /*
1103: * Convert a scaling width to basic units, rounding to closest.
1104: */
1105: int
1106: term_hen(const struct termp *p, const struct roffsu *su)
1107: {
1108: int bu;
1109:
1110: if ((bu = (*p->hspan)(p, su)) >= 0)
1111: return (bu + 11) / 24;
1112: else
1113: return -((-bu + 11) / 24);
1.106 kristaps 1114: }
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