Annotation of src/usr.bin/mandoc/term.c, Revision 1.115
1.115 ! schwarze 1: /* $OpenBSD: term.c,v 1.114 2015/10/13 22:57:49 schwarze Exp $ */
1.1 kristaps 2: /*
1.59 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.103 schwarze 4: * Copyright (c) 2010-2015 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.2 schwarze 7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 9: *
1.106 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.2 schwarze 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.106 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.2 schwarze 13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 kristaps 17: */
1.20 schwarze 18: #include <sys/types.h>
19:
1.1 kristaps 20: #include <assert.h>
1.20 schwarze 21: #include <ctype.h>
1.1 kristaps 22: #include <stdio.h>
23: #include <stdlib.h>
24: #include <string.h>
25:
1.34 schwarze 26: #include "mandoc.h"
1.79 schwarze 27: #include "mandoc_aux.h"
1.16 schwarze 28: #include "out.h"
1.1 kristaps 29: #include "term.h"
1.16 schwarze 30: #include "main.h"
1.1 kristaps 31:
1.64 schwarze 32: static size_t cond_width(const struct termp *, int, int *);
1.71 schwarze 33: static void adjbuf(struct termp *p, size_t);
1.59 schwarze 34: static void bufferc(struct termp *, char);
35: static void encode(struct termp *, const char *, size_t);
36: static void encode1(struct termp *, int);
1.1 kristaps 37:
1.83 schwarze 38:
1.37 schwarze 39: void
40: term_free(struct termp *p)
1.1 kristaps 41: {
42:
1.91 schwarze 43: free(p->buf);
1.98 schwarze 44: free(p->fontq);
1.37 schwarze 45: free(p);
1.1 kristaps 46: }
47:
1.13 schwarze 48: void
1.83 schwarze 49: term_begin(struct termp *p, term_margin head,
1.106 schwarze 50: term_margin foot, const struct roff_meta *arg)
1.1 kristaps 51: {
52:
1.37 schwarze 53: p->headf = head;
54: p->footf = foot;
55: p->argf = arg;
56: (*p->begin)(p);
1.1 kristaps 57: }
58:
1.37 schwarze 59: void
60: term_end(struct termp *p)
1.1 kristaps 61: {
62:
1.37 schwarze 63: (*p->end)(p);
1.1 kristaps 64: }
65:
66: /*
1.82 schwarze 67: * Flush a chunk of text. By default, break the output line each time
68: * the right margin is reached, and continue output on the next line
69: * at the same offset as the chunk itself. By default, also break the
70: * output line at the end of the chunk.
1.27 schwarze 71: * The following flags may be specified:
1.1 kristaps 72: *
1.82 schwarze 73: * - TERMP_NOBREAK: Do not break the output line at the right margin,
74: * but only at the max right margin. Also, do not break the output
75: * line at the end of the chunk, such that the next call can pad to
76: * the next column. However, if less than p->trailspace blanks,
77: * which can be 0, 1, or 2, remain to the right margin, the line
78: * will be broken.
1.110 schwarze 79: * - TERMP_BRTRSP: Consider trailing whitespace significant
80: * when deciding whether the chunk fits or not.
1.82 schwarze 81: * - TERMP_BRIND: If the chunk does not fit and the output line has
82: * to be broken, start the next line at the right margin instead
83: * of at the offset. Used together with TERMP_NOBREAK for the tags
84: * in various kinds of tagged lists.
85: * - TERMP_DANGLE: Do not break the output line at the right margin,
86: * append the next chunk after it even if this one is too long.
87: * To be used together with TERMP_NOBREAK.
88: * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
89: * the next chunk if this column is not full.
1.1 kristaps 90: */
91: void
92: term_flushln(struct termp *p)
93: {
1.71 schwarze 94: size_t i; /* current input position in p->buf */
1.66 schwarze 95: int ntab; /* number of tabs to prepend */
1.19 schwarze 96: size_t vis; /* current visual position on output */
97: size_t vbl; /* number of blanks to prepend to output */
1.33 schwarze 98: size_t vend; /* end of word visual position on output */
1.19 schwarze 99: size_t bp; /* visual right border position */
1.51 schwarze 100: size_t dv; /* temporary for visual pos calculations */
1.71 schwarze 101: size_t j; /* temporary loop index for p->buf */
102: size_t jhy; /* last hyph before overflow w/r/t j */
1.42 schwarze 103: size_t maxvis; /* output position of visible boundary */
1.1 kristaps 104:
105: /*
106: * First, establish the maximum columns of "visible" content.
107: * This is usually the difference between the right-margin and
108: * an indentation, but can be, for tagged lists or columns, a
1.73 schwarze 109: * small set of values.
110: *
111: * The following unsigned-signed subtractions look strange,
112: * but they are actually correct. If the int p->overstep
113: * is negative, it gets sign extended. Subtracting that
114: * very large size_t effectively adds a small number to dv.
1.1 kristaps 115: */
1.100 schwarze 116: dv = p->rmargin > p->offset ? p->rmargin - p->offset : 0;
1.53 schwarze 117: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.9 schwarze 118:
1.96 schwarze 119: if (p->flags & TERMP_NOBREAK) {
120: dv = p->maxrmargin > p->offset ?
121: p->maxrmargin - p->offset : 0;
122: bp = (int)dv > p->overstep ?
123: dv - (size_t)p->overstep : 0;
124: } else
125: bp = maxvis;
1.19 schwarze 126:
1.33 schwarze 127: /*
1.61 schwarze 128: * Calculate the required amount of padding.
1.33 schwarze 129: */
1.61 schwarze 130: vbl = p->offset + p->overstep > p->viscol ?
131: p->offset + p->overstep - p->viscol : 0;
1.33 schwarze 132:
1.53 schwarze 133: vis = vend = 0;
134: i = 0;
1.19 schwarze 135:
1.59 schwarze 136: while (i < p->col) {
1.22 schwarze 137: /*
1.42 schwarze 138: * Handle literal tab characters: collapse all
139: * subsequent tabs into a single huge set of spaces.
1.30 schwarze 140: */
1.66 schwarze 141: ntab = 0;
1.59 schwarze 142: while (i < p->col && '\t' == p->buf[i]) {
1.42 schwarze 143: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.30 schwarze 144: vbl += vend - vis;
145: vis = vend;
1.66 schwarze 146: ntab++;
1.49 schwarze 147: i++;
1.30 schwarze 148: }
1.22 schwarze 149:
1.1 kristaps 150: /*
151: * Count up visible word characters. Control sequences
152: * (starting with the CSI) aren't counted. A space
153: * generates a non-printing word, which is valid (the
154: * space is printed according to regular spacing rules).
155: */
156:
1.59 schwarze 157: for (j = i, jhy = 0; j < p->col; j++) {
1.69 schwarze 158: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.1 kristaps 159: break;
1.42 schwarze 160:
161: /* Back over the the last printed character. */
162: if (8 == p->buf[j]) {
163: assert(j);
164: vend -= (*p->width)(p, p->buf[j - 1]);
165: continue;
166: }
167:
168: /* Regular word. */
169: /* Break at the hyphen point if we overrun. */
1.83 schwarze 170: if (vend > vis && vend < bp &&
1.77 schwarze 171: (ASCII_HYPH == p->buf[j] ||
172: ASCII_BREAK == p->buf[j]))
1.42 schwarze 173: jhy = j;
174:
1.78 schwarze 175: /*
176: * Hyphenation now decided, put back a real
177: * hyphen such that we get the correct width.
178: */
179: if (ASCII_HYPH == p->buf[j])
180: p->buf[j] = '-';
181:
1.42 schwarze 182: vend += (*p->width)(p, p->buf[j]);
1.1 kristaps 183: }
184:
185: /*
1.5 schwarze 186: * Find out whether we would exceed the right margin.
1.33 schwarze 187: * If so, break to the next line.
1.5 schwarze 188: */
1.33 schwarze 189: if (vend > bp && 0 == jhy && vis > 0) {
1.22 schwarze 190: vend -= vis;
1.37 schwarze 191: (*p->endline)(p);
1.62 schwarze 192: p->viscol = 0;
1.82 schwarze 193: if (TERMP_BRIND & p->flags) {
1.100 schwarze 194: vbl = p->rmargin;
195: vend += p->rmargin;
196: vend -= p->offset;
1.62 schwarze 197: } else
1.33 schwarze 198: vbl = p->offset;
1.66 schwarze 199:
200: /* use pending tabs on the new line */
201:
202: if (0 < ntab)
203: vbl += ntab * p->tabwidth;
1.33 schwarze 204:
1.73 schwarze 205: /*
206: * Remove the p->overstep width.
207: * Again, if p->overstep is negative,
208: * sign extension does the right thing.
209: */
1.33 schwarze 210:
1.53 schwarze 211: bp += (size_t)p->overstep;
1.26 schwarze 212: p->overstep = 0;
1.1 kristaps 213: }
1.30 schwarze 214:
1.33 schwarze 215: /* Write out the [remaining] word. */
1.59 schwarze 216: for ( ; i < p->col; i++) {
1.25 schwarze 217: if (vend > bp && jhy > 0 && i > jhy)
1.30 schwarze 218: break;
219: if ('\t' == p->buf[i])
1.1 kristaps 220: break;
1.22 schwarze 221: if (' ' == p->buf[i]) {
1.46 schwarze 222: j = i;
1.88 schwarze 223: while (i < p->col && ' ' == p->buf[i])
1.33 schwarze 224: i++;
1.71 schwarze 225: dv = (i - j) * (*p->width)(p, ' ');
1.51 schwarze 226: vbl += dv;
227: vend += dv;
1.22 schwarze 228: break;
229: }
1.33 schwarze 230: if (ASCII_NBRSP == p->buf[i]) {
1.42 schwarze 231: vbl += (*p->width)(p, ' ');
1.33 schwarze 232: continue;
233: }
1.77 schwarze 234: if (ASCII_BREAK == p->buf[i])
235: continue;
1.33 schwarze 236:
237: /*
238: * Now we definitely know there will be
239: * printable characters to output,
240: * so write preceding white space now.
241: */
242: if (vbl) {
1.37 schwarze 243: (*p->advance)(p, vbl);
1.33 schwarze 244: p->viscol += vbl;
245: vbl = 0;
1.61 schwarze 246: }
247:
248: (*p->letter)(p, p->buf[i]);
249: if (8 == p->buf[i])
250: p->viscol -= (*p->width)(p, p->buf[i-1]);
1.83 schwarze 251: else
1.42 schwarze 252: p->viscol += (*p->width)(p, p->buf[i]);
1.1 kristaps 253: }
1.22 schwarze 254: vis = vend;
1.1 kristaps 255: }
1.48 schwarze 256:
257: /*
258: * If there was trailing white space, it was not printed;
259: * so reset the cursor position accordingly.
260: */
1.95 schwarze 261: if (vis > vbl)
1.61 schwarze 262: vis -= vbl;
1.95 schwarze 263: else
264: vis = 0;
1.18 schwarze 265:
1.9 schwarze 266: p->col = 0;
1.26 schwarze 267: p->overstep = 0;
1.108 schwarze 268: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE);
1.1 kristaps 269:
1.9 schwarze 270: if ( ! (TERMP_NOBREAK & p->flags)) {
1.29 schwarze 271: p->viscol = 0;
1.37 schwarze 272: (*p->endline)(p);
1.1 kristaps 273: return;
274: }
275:
1.9 schwarze 276: if (TERMP_HANG & p->flags) {
1.102 schwarze 277: p->overstep += (int)(p->offset + vis - p->rmargin +
1.83 schwarze 278: p->trailspace * (*p->width)(p, ' '));
1.9 schwarze 279:
280: /*
281: * If we have overstepped the margin, temporarily move
282: * it to the right and flag the rest of the line to be
283: * shorter.
1.73 schwarze 284: * If there is a request to keep the columns together,
285: * allow negative overstep when the column is not full.
1.9 schwarze 286: */
1.73 schwarze 287: if (p->trailspace && p->overstep < 0)
1.26 schwarze 288: p->overstep = 0;
1.61 schwarze 289: return;
1.9 schwarze 290:
291: } else if (TERMP_DANGLE & p->flags)
292: return;
1.110 schwarze 293:
294: /* Trailing whitespace is significant in some columns. */
295: if (vis && vbl && (TERMP_BRTRSP & p->flags))
296: vis += vbl;
1.1 kristaps 297:
1.61 schwarze 298: /* If the column was overrun, break the line. */
1.72 schwarze 299: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.37 schwarze 300: (*p->endline)(p);
1.61 schwarze 301: p->viscol = 0;
1.9 schwarze 302: }
1.1 kristaps 303: }
304:
1.83 schwarze 305: /*
1.1 kristaps 306: * A newline only breaks an existing line; it won't assert vertical
307: * space. All data in the output buffer is flushed prior to the newline
308: * assertion.
309: */
310: void
311: term_newln(struct termp *p)
312: {
313:
314: p->flags |= TERMP_NOSPACE;
1.61 schwarze 315: if (p->col || p->viscol)
316: term_flushln(p);
1.1 kristaps 317: }
318:
319: /*
320: * Asserts a vertical space (a full, empty line-break between lines).
321: * Note that if used twice, this will cause two blank spaces and so on.
322: * All data in the output buffer is flushed prior to the newline
323: * assertion.
324: */
325: void
326: term_vspace(struct termp *p)
327: {
328:
329: term_newln(p);
1.29 schwarze 330: p->viscol = 0;
1.63 schwarze 331: if (0 < p->skipvsp)
332: p->skipvsp--;
333: else
334: (*p->endline)(p);
1.1 kristaps 335: }
336:
1.98 schwarze 337: /* Swap current and previous font; for \fP and .ft P */
1.20 schwarze 338: void
339: term_fontlast(struct termp *p)
340: {
341: enum termfont f;
1.11 schwarze 342:
1.20 schwarze 343: f = p->fontl;
344: p->fontl = p->fontq[p->fonti];
345: p->fontq[p->fonti] = f;
346: }
347:
1.98 schwarze 348: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.20 schwarze 349: void
350: term_fontrepl(struct termp *p, enum termfont f)
351: {
352:
353: p->fontl = p->fontq[p->fonti];
354: p->fontq[p->fonti] = f;
1.1 kristaps 355: }
356:
1.98 schwarze 357: /* Set font, save previous. */
1.20 schwarze 358: void
359: term_fontpush(struct termp *p, enum termfont f)
1.1 kristaps 360: {
1.7 schwarze 361:
1.20 schwarze 362: p->fontl = p->fontq[p->fonti];
1.98 schwarze 363: if (++p->fonti == p->fontsz) {
364: p->fontsz += 8;
365: p->fontq = mandoc_reallocarray(p->fontq,
366: p->fontsz, sizeof(enum termfont *));
367: }
368: p->fontq[p->fonti] = f;
1.20 schwarze 369: }
1.1 kristaps 370:
1.98 schwarze 371: /* Flush to make the saved pointer current again. */
1.20 schwarze 372: void
1.104 schwarze 373: term_fontpopq(struct termp *p, int i)
1.20 schwarze 374: {
1.1 kristaps 375:
1.104 schwarze 376: assert(i >= 0);
377: if (p->fonti > i)
378: p->fonti = i;
1.20 schwarze 379: }
1.1 kristaps 380:
1.98 schwarze 381: /* Pop one font off the stack. */
1.20 schwarze 382: void
383: term_fontpop(struct termp *p)
384: {
1.1 kristaps 385:
1.20 schwarze 386: assert(p->fonti);
387: p->fonti--;
1.1 kristaps 388: }
389:
390: /*
391: * Handle pwords, partial words, which may be either a single word or a
392: * phrase that cannot be broken down (such as a literal string). This
393: * handles word styling.
394: */
1.7 schwarze 395: void
396: term_word(struct termp *p, const char *word)
1.1 kristaps 397: {
1.75 schwarze 398: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.59 schwarze 399: const char *seq, *cp;
400: int sz, uc;
1.20 schwarze 401: size_t ssz;
1.59 schwarze 402: enum mandoc_esc esc;
1.1 kristaps 403:
1.31 schwarze 404: if ( ! (TERMP_NOSPACE & p->flags)) {
1.40 schwarze 405: if ( ! (TERMP_KEEP & p->flags)) {
1.31 schwarze 406: bufferc(p, ' ');
1.40 schwarze 407: if (TERMP_SENTENCE & p->flags)
408: bufferc(p, ' ');
409: } else
410: bufferc(p, ASCII_NBRSP);
1.31 schwarze 411: }
1.68 schwarze 412: if (TERMP_PREKEEP & p->flags)
413: p->flags |= TERMP_KEEP;
1.1 kristaps 414:
415: if ( ! (p->flags & TERMP_NONOSPACE))
416: p->flags &= ~TERMP_NOSPACE;
1.46 schwarze 417: else
418: p->flags |= TERMP_NOSPACE;
1.1 kristaps 419:
1.97 schwarze 420: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
1.105 schwarze 421: p->skipvsp = 0;
1.31 schwarze 422:
1.59 schwarze 423: while ('\0' != *word) {
1.64 schwarze 424: if ('\\' != *word) {
1.75 schwarze 425: if (TERMP_NBRWORD & p->flags) {
426: if (' ' == *word) {
427: encode(p, nbrsp, 1);
428: word++;
429: continue;
430: }
431: ssz = strcspn(word, "\\ ");
432: } else
433: ssz = strcspn(word, "\\");
1.45 schwarze 434: encode(p, word, ssz);
1.64 schwarze 435: word += (int)ssz;
1.20 schwarze 436: continue;
1.64 schwarze 437: }
1.20 schwarze 438:
1.59 schwarze 439: word++;
440: esc = mandoc_escape(&word, &seq, &sz);
441: if (ESCAPE_ERROR == esc)
1.85 schwarze 442: continue;
1.59 schwarze 443:
444: switch (esc) {
1.83 schwarze 445: case ESCAPE_UNICODE:
1.89 schwarze 446: uc = mchars_num2uc(seq + 1, sz - 1);
1.56 schwarze 447: break;
1.83 schwarze 448: case ESCAPE_NUMBERED:
1.93 schwarze 449: uc = mchars_num2char(seq, sz);
450: if (uc < 0)
451: continue;
1.20 schwarze 452: break;
1.83 schwarze 453: case ESCAPE_SPECIAL:
1.89 schwarze 454: if (p->enc == TERMENC_ASCII) {
1.114 schwarze 455: cp = mchars_spec2str(seq, sz, &ssz);
1.92 schwarze 456: if (cp != NULL)
1.89 schwarze 457: encode(p, cp, ssz);
458: } else {
1.114 schwarze 459: uc = mchars_spec2cp(seq, sz);
1.90 schwarze 460: if (uc > 0)
461: encode1(p, uc);
1.89 schwarze 462: }
1.93 schwarze 463: continue;
1.83 schwarze 464: case ESCAPE_FONTBOLD:
1.20 schwarze 465: term_fontrepl(p, TERMFONT_BOLD);
1.93 schwarze 466: continue;
1.83 schwarze 467: case ESCAPE_FONTITALIC:
1.20 schwarze 468: term_fontrepl(p, TERMFONT_UNDER);
1.93 schwarze 469: continue;
1.83 schwarze 470: case ESCAPE_FONTBI:
1.70 schwarze 471: term_fontrepl(p, TERMFONT_BI);
1.93 schwarze 472: continue;
1.83 schwarze 473: case ESCAPE_FONT:
474: case ESCAPE_FONTROMAN:
1.20 schwarze 475: term_fontrepl(p, TERMFONT_NONE);
1.93 schwarze 476: continue;
1.83 schwarze 477: case ESCAPE_FONTPREV:
1.20 schwarze 478: term_fontlast(p);
1.93 schwarze 479: continue;
1.83 schwarze 480: case ESCAPE_NOSPACE:
1.108 schwarze 481: if (p->flags & TERMP_BACKAFTER)
482: p->flags &= ~TERMP_BACKAFTER;
483: else if (*word == '\0')
1.97 schwarze 484: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.93 schwarze 485: continue;
1.83 schwarze 486: case ESCAPE_SKIPCHAR:
1.108 schwarze 487: p->flags |= TERMP_BACKAFTER;
1.93 schwarze 488: continue;
1.103 schwarze 489: case ESCAPE_OVERSTRIKE:
490: cp = seq + sz;
491: while (seq < cp) {
492: if (*seq == '\\') {
493: mandoc_escape(&seq, NULL, NULL);
494: continue;
495: }
496: encode1(p, *seq++);
1.108 schwarze 497: if (seq < cp) {
498: if (p->flags & TERMP_BACKBEFORE)
499: p->flags |= TERMP_BACKAFTER;
500: else
501: p->flags |= TERMP_BACKBEFORE;
502: }
1.103 schwarze 503: }
1.109 schwarze 504: /* Trim trailing backspace/blank pair. */
505: if (p->col > 2 && p->buf[p->col - 1] == ' ')
506: p->col -= 2;
1.108 schwarze 507: continue;
1.20 schwarze 508: default:
1.93 schwarze 509: continue;
510: }
511:
512: /*
513: * Common handling for Unicode and numbered
514: * character escape sequences.
515: */
516:
517: if (p->enc == TERMENC_ASCII) {
518: cp = ascii_uc2str(uc);
519: encode(p, cp, strlen(cp));
520: } else {
521: if ((uc < 0x20 && uc != 0x09) ||
522: (uc > 0x7E && uc < 0xA0))
523: uc = 0xFFFD;
524: encode1(p, uc);
1.20 schwarze 525: }
526: }
1.75 schwarze 527: p->flags &= ~TERMP_NBRWORD;
1.1 kristaps 528: }
529:
530: static void
1.71 schwarze 531: adjbuf(struct termp *p, size_t sz)
1.1 kristaps 532: {
533:
1.20 schwarze 534: if (0 == p->maxcols)
535: p->maxcols = 1024;
536: while (sz >= p->maxcols)
537: p->maxcols <<= 2;
538:
1.84 schwarze 539: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.1 kristaps 540: }
541:
1.4 schwarze 542: static void
1.20 schwarze 543: bufferc(struct termp *p, char c)
544: {
545:
546: if (p->col + 1 >= p->maxcols)
547: adjbuf(p, p->col + 1);
548:
1.59 schwarze 549: p->buf[p->col++] = c;
1.20 schwarze 550: }
551:
1.59 schwarze 552: /*
553: * See encode().
554: * Do this for a single (probably unicode) value.
555: * Does not check for non-decorated glyphs.
556: */
557: static void
558: encode1(struct termp *p, int c)
559: {
560: enum termfont f;
561:
1.108 schwarze 562: if (p->col + 7 >= p->maxcols)
563: adjbuf(p, p->col + 7);
1.59 schwarze 564:
1.115 ! schwarze 565: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.108 schwarze 566: p->fontq[p->fonti] : TERMFONT_NONE;
1.59 schwarze 567:
1.108 schwarze 568: if (p->flags & TERMP_BACKBEFORE) {
1.109 schwarze 569: if (p->buf[p->col - 1] == ' ')
570: p->col--;
571: else
572: p->buf[p->col++] = 8;
1.108 schwarze 573: p->flags &= ~TERMP_BACKBEFORE;
574: }
1.70 schwarze 575: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.59 schwarze 576: p->buf[p->col++] = '_';
1.70 schwarze 577: p->buf[p->col++] = 8;
578: }
579: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
580: if (ASCII_HYPH == c)
581: p->buf[p->col++] = '-';
582: else
583: p->buf[p->col++] = c;
584: p->buf[p->col++] = 8;
585: }
1.59 schwarze 586: p->buf[p->col++] = c;
1.108 schwarze 587: if (p->flags & TERMP_BACKAFTER) {
588: p->flags |= TERMP_BACKBEFORE;
589: p->flags &= ~TERMP_BACKAFTER;
590: }
1.59 schwarze 591: }
1.20 schwarze 592:
593: static void
594: encode(struct termp *p, const char *word, size_t sz)
1.4 schwarze 595: {
1.71 schwarze 596: size_t i;
1.59 schwarze 597:
1.108 schwarze 598: if (p->col + 2 + (sz * 5) >= p->maxcols)
599: adjbuf(p, p->col + 2 + (sz * 5));
1.46 schwarze 600:
1.71 schwarze 601: for (i = 0; i < sz; i++) {
1.70 schwarze 602: if (ASCII_HYPH == word[i] ||
603: isgraph((unsigned char)word[i]))
604: encode1(p, word[i]);
1.20 schwarze 605: else
1.59 schwarze 606: p->buf[p->col++] = word[i];
1.4 schwarze 607: }
1.80 schwarze 608: }
609:
610: void
611: term_setwidth(struct termp *p, const char *wstr)
612: {
613: struct roffsu su;
1.107 schwarze 614: int iop, width;
1.80 schwarze 615:
1.81 schwarze 616: iop = 0;
617: width = 0;
1.80 schwarze 618: if (NULL != wstr) {
619: switch (*wstr) {
1.83 schwarze 620: case '+':
1.80 schwarze 621: iop = 1;
622: wstr++;
623: break;
1.83 schwarze 624: case '-':
1.80 schwarze 625: iop = -1;
626: wstr++;
627: break;
628: default:
629: break;
630: }
1.81 schwarze 631: if (a2roffsu(wstr, &su, SCALE_MAX))
632: width = term_hspan(p, &su);
633: else
1.80 schwarze 634: iop = 0;
635: }
636: (*p->setwidth)(p, iop, width);
1.4 schwarze 637: }
1.16 schwarze 638:
639: size_t
1.39 schwarze 640: term_len(const struct termp *p, size_t sz)
641: {
642:
1.112 schwarze 643: return (*p->width)(p, ' ') * sz;
1.39 schwarze 644: }
645:
1.64 schwarze 646: static size_t
647: cond_width(const struct termp *p, int c, int *skip)
648: {
649:
650: if (*skip) {
651: (*skip) = 0;
1.112 schwarze 652: return 0;
1.64 schwarze 653: } else
1.112 schwarze 654: return (*p->width)(p, c);
1.64 schwarze 655: }
1.39 schwarze 656:
657: size_t
658: term_strlen(const struct termp *p, const char *cp)
659: {
1.59 schwarze 660: size_t sz, rsz, i;
1.93 schwarze 661: int ssz, skip, uc;
1.50 schwarze 662: const char *seq, *rhs;
1.59 schwarze 663: enum mandoc_esc esc;
1.77 schwarze 664: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
665: ASCII_BREAK, '\0' };
1.59 schwarze 666:
667: /*
668: * Account for escaped sequences within string length
669: * calculations. This follows the logic in term_word() as we
670: * must calculate the width of produced strings.
671: */
672:
673: sz = 0;
1.64 schwarze 674: skip = 0;
1.59 schwarze 675: while ('\0' != *cp) {
676: rsz = strcspn(cp, rej);
677: for (i = 0; i < rsz; i++)
1.64 schwarze 678: sz += cond_width(p, *cp++, &skip);
1.59 schwarze 679:
680: switch (*cp) {
1.83 schwarze 681: case '\\':
1.59 schwarze 682: cp++;
683: esc = mandoc_escape(&cp, &seq, &ssz);
684: if (ESCAPE_ERROR == esc)
1.85 schwarze 685: continue;
1.59 schwarze 686:
687: rhs = NULL;
1.50 schwarze 688:
1.59 schwarze 689: switch (esc) {
1.83 schwarze 690: case ESCAPE_UNICODE:
1.94 schwarze 691: uc = mchars_num2uc(seq + 1, ssz - 1);
1.59 schwarze 692: break;
1.83 schwarze 693: case ESCAPE_NUMBERED:
1.93 schwarze 694: uc = mchars_num2char(seq, ssz);
695: if (uc < 0)
696: continue;
1.50 schwarze 697: break;
1.83 schwarze 698: case ESCAPE_SPECIAL:
1.93 schwarze 699: if (p->enc == TERMENC_ASCII) {
1.114 schwarze 700: rhs = mchars_spec2str(seq, ssz, &rsz);
1.93 schwarze 701: if (rhs != NULL)
702: break;
703: } else {
1.114 schwarze 704: uc = mchars_spec2cp(seq, ssz);
1.93 schwarze 705: if (uc > 0)
706: sz += cond_width(p, uc, &skip);
1.89 schwarze 707: }
1.93 schwarze 708: continue;
1.83 schwarze 709: case ESCAPE_SKIPCHAR:
1.64 schwarze 710: skip = 1;
1.103 schwarze 711: continue;
712: case ESCAPE_OVERSTRIKE:
713: rsz = 0;
714: rhs = seq + ssz;
715: while (seq < rhs) {
716: if (*seq == '\\') {
717: mandoc_escape(&seq, NULL, NULL);
718: continue;
719: }
720: i = (*p->width)(p, *seq++);
721: if (rsz < i)
722: rsz = i;
723: }
724: sz += rsz;
1.93 schwarze 725: continue;
1.50 schwarze 726: default:
1.93 schwarze 727: continue;
1.50 schwarze 728: }
1.39 schwarze 729:
1.93 schwarze 730: /*
731: * Common handling for Unicode and numbered
732: * character escape sequences.
733: */
734:
735: if (rhs == NULL) {
736: if (p->enc == TERMENC_ASCII) {
737: rhs = ascii_uc2str(uc);
738: rsz = strlen(rhs);
739: } else {
740: if ((uc < 0x20 && uc != 0x09) ||
741: (uc > 0x7E && uc < 0xA0))
742: uc = 0xFFFD;
743: sz += cond_width(p, uc, &skip);
744: continue;
745: }
746: }
1.59 schwarze 747:
1.64 schwarze 748: if (skip) {
749: skip = 0;
750: break;
751: }
1.93 schwarze 752:
753: /*
754: * Common handling for all escape sequences
755: * printing more than one character.
756: */
1.64 schwarze 757:
1.59 schwarze 758: for (i = 0; i < rsz; i++)
759: sz += (*p->width)(p, *rhs++);
760: break;
1.83 schwarze 761: case ASCII_NBRSP:
1.64 schwarze 762: sz += cond_width(p, ' ', &skip);
1.55 schwarze 763: cp++;
1.59 schwarze 764: break;
1.83 schwarze 765: case ASCII_HYPH:
1.64 schwarze 766: sz += cond_width(p, '-', &skip);
1.55 schwarze 767: cp++;
1.59 schwarze 768: break;
769: default:
770: break;
771: }
772: }
1.39 schwarze 773:
1.112 schwarze 774: return sz;
1.39 schwarze 775: }
776:
1.100 schwarze 777: int
1.39 schwarze 778: term_vspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 779: {
780: double r;
1.101 schwarze 781: int ri;
1.16 schwarze 782:
783: switch (su->unit) {
1.99 schwarze 784: case SCALE_BU:
785: r = su->scale / 40.0;
786: break;
1.83 schwarze 787: case SCALE_CM:
1.99 schwarze 788: r = su->scale * 6.0 / 2.54;
789: break;
790: case SCALE_FS:
791: r = su->scale * 65536.0 / 40.0;
1.16 schwarze 792: break;
1.83 schwarze 793: case SCALE_IN:
1.86 schwarze 794: r = su->scale * 6.0;
1.16 schwarze 795: break;
1.99 schwarze 796: case SCALE_MM:
797: r = su->scale * 0.006;
798: break;
1.83 schwarze 799: case SCALE_PC:
1.16 schwarze 800: r = su->scale;
801: break;
1.83 schwarze 802: case SCALE_PT:
1.99 schwarze 803: r = su->scale / 12.0;
1.16 schwarze 804: break;
1.99 schwarze 805: case SCALE_EN:
806: case SCALE_EM:
807: r = su->scale * 0.6;
1.16 schwarze 808: break;
1.83 schwarze 809: case SCALE_VS:
1.16 schwarze 810: r = su->scale;
811: break;
812: default:
1.99 schwarze 813: abort();
1.16 schwarze 814: }
1.101 schwarze 815: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.112 schwarze 816: return ri < 66 ? ri : 1;
1.16 schwarze 817: }
818:
1.107 schwarze 819: /*
820: * Convert a scaling width to basic units, rounding down.
821: */
1.100 schwarze 822: int
1.39 schwarze 823: term_hspan(const struct termp *p, const struct roffsu *su)
1.16 schwarze 824: {
825:
1.112 schwarze 826: return (*p->hspan)(p, su);
1.16 schwarze 827: }
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