Annotation of mandoc/term.c, Revision 1.244
1.244 ! schwarze 1: /* $Id: term.c,v 1.243 2015/01/21 20:33:25 schwarze Exp $ */
1.1 kristaps 2: /*
1.198 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.243 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
1.74 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: *
1.74 kristaps 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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>
1.22 kristaps 24: #include <stdio.h>
1.1 kristaps 25: #include <stdlib.h>
26: #include <string.h>
27:
1.137 kristaps 28: #include "mandoc.h"
1.218 schwarze 29: #include "mandoc_aux.h"
1.107 kristaps 30: #include "out.h"
1.71 kristaps 31: #include "term.h"
1.105 kristaps 32: #include "main.h"
1.1 kristaps 33:
1.203 schwarze 34: static size_t cond_width(const struct termp *, int, int *);
1.210 schwarze 35: static void adjbuf(struct termp *p, size_t);
1.191 kristaps 36: static void bufferc(struct termp *, char);
37: static void encode(struct termp *, const char *, size_t);
1.194 kristaps 38: static void encode1(struct termp *, int);
1.11 kristaps 39:
1.222 schwarze 40:
1.145 kristaps 41: void
1.71 kristaps 42: term_free(struct termp *p)
1.14 kristaps 43: {
44:
1.231 schwarze 45: free(p->buf);
1.238 schwarze 46: free(p->fontq);
1.142 kristaps 47: free(p);
48: }
49:
50: void
1.222 schwarze 51: term_begin(struct termp *p, term_margin head,
1.142 kristaps 52: term_margin foot, const void *arg)
53: {
54:
55: p->headf = head;
56: p->footf = foot;
57: p->argf = arg;
1.146 kristaps 58: (*p->begin)(p);
1.142 kristaps 59: }
60:
61: void
62: term_end(struct termp *p)
63: {
64:
1.146 kristaps 65: (*p->end)(p);
1.14 kristaps 66: }
67:
1.71 kristaps 68: /*
1.221 schwarze 69: * Flush a chunk of text. By default, break the output line each time
70: * the right margin is reached, and continue output on the next line
71: * at the same offset as the chunk itself. By default, also break the
72: * output line at the end of the chunk.
1.130 kristaps 73: * The following flags may be specified:
1.71 kristaps 74: *
1.221 schwarze 75: * - TERMP_NOBREAK: Do not break the output line at the right margin,
76: * but only at the max right margin. Also, do not break the output
77: * line at the end of the chunk, such that the next call can pad to
78: * the next column. However, if less than p->trailspace blanks,
79: * which can be 0, 1, or 2, remain to the right margin, the line
80: * will be broken.
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.
1.71 kristaps 90: */
91: void
92: term_flushln(struct termp *p)
1.53 kristaps 93: {
1.210 schwarze 94: size_t i; /* current input position in p->buf */
1.205 schwarze 95: int ntab; /* number of tabs to prepend */
1.114 kristaps 96: size_t vis; /* current visual position on output */
97: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 98: size_t vend; /* end of word visual position on output */
1.114 kristaps 99: size_t bp; /* visual right border position */
1.172 schwarze 100: size_t dv; /* temporary for visual pos calculations */
1.210 schwarze 101: size_t j; /* temporary loop index for p->buf */
102: size_t jhy; /* last hyph before overflow w/r/t j */
1.152 kristaps 103: size_t maxvis; /* output position of visible boundary */
1.53 kristaps 104:
1.71 kristaps 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
1.212 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.
1.71 kristaps 115: */
1.240 schwarze 116: dv = p->rmargin > p->offset ? p->rmargin - p->offset : 0;
1.174 schwarze 117: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 118:
1.236 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;
1.115 kristaps 126:
1.136 schwarze 127: /*
1.200 schwarze 128: * Calculate the required amount of padding.
1.136 schwarze 129: */
1.200 schwarze 130: vbl = p->offset + p->overstep > p->viscol ?
131: p->offset + p->overstep - p->viscol : 0;
1.136 schwarze 132:
1.174 schwarze 133: vis = vend = 0;
134: i = 0;
1.115 kristaps 135:
1.188 kristaps 136: while (i < p->col) {
1.71 kristaps 137: /*
1.154 kristaps 138: * Handle literal tab characters: collapse all
139: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 140: */
1.205 schwarze 141: ntab = 0;
1.188 kristaps 142: while (i < p->col && '\t' == p->buf[i]) {
1.154 kristaps 143: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 144: vbl += vend - vis;
145: vis = vend;
1.205 schwarze 146: ntab++;
1.169 schwarze 147: i++;
1.138 schwarze 148: }
149:
150: /*
1.71 kristaps 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:
1.188 kristaps 157: for (j = i, jhy = 0; j < p->col; j++) {
1.208 schwarze 158: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.71 kristaps 159: break;
1.154 kristaps 160:
161: /* Back over the the last printed character. */
162: if (8 == p->buf[j]) {
1.153 kristaps 163: assert(j);
164: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 165: continue;
1.153 kristaps 166: }
1.154 kristaps 167:
168: /* Regular word. */
169: /* Break at the hyphen point if we overrun. */
1.222 schwarze 170: if (vend > vis && vend < bp &&
1.216 schwarze 171: (ASCII_HYPH == p->buf[j] ||
172: ASCII_BREAK == p->buf[j]))
1.154 kristaps 173: jhy = j;
174:
1.217 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:
1.154 kristaps 182: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 183: }
1.53 kristaps 184:
1.71 kristaps 185: /*
1.81 kristaps 186: * Find out whether we would exceed the right margin.
1.136 schwarze 187: * If so, break to the next line.
1.81 kristaps 188: */
1.140 kristaps 189: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 190: vend -= vis;
1.146 kristaps 191: (*p->endline)(p);
1.201 schwarze 192: p->viscol = 0;
1.221 schwarze 193: if (TERMP_BRIND & p->flags) {
1.240 schwarze 194: vbl = p->rmargin;
195: vend += p->rmargin;
196: vend -= p->offset;
1.201 schwarze 197: } else
1.136 schwarze 198: vbl = p->offset;
1.205 schwarze 199:
200: /* use pending tabs on the new line */
201:
202: if (0 < ntab)
203: vbl += ntab * p->tabwidth;
1.130 kristaps 204:
1.212 schwarze 205: /*
206: * Remove the p->overstep width.
207: * Again, if p->overstep is negative,
208: * sign extension does the right thing.
209: */
1.130 kristaps 210:
1.174 schwarze 211: bp += (size_t)p->overstep;
1.129 kristaps 212: p->overstep = 0;
1.71 kristaps 213: }
1.138 schwarze 214:
1.130 kristaps 215: /* Write out the [remaining] word. */
1.188 kristaps 216: for ( ; i < p->col; i++) {
1.140 kristaps 217: if (vend > bp && jhy > 0 && i > jhy)
218: break;
1.138 schwarze 219: if ('\t' == p->buf[i])
220: break;
1.136 schwarze 221: if (' ' == p->buf[i]) {
1.164 kristaps 222: j = i;
1.228 kristaps 223: while (i < p->col && ' ' == p->buf[i])
1.136 schwarze 224: i++;
1.210 schwarze 225: dv = (i - j) * (*p->width)(p, ' ');
1.172 schwarze 226: vbl += dv;
227: vend += dv;
1.71 kristaps 228: break;
1.136 schwarze 229: }
230: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 231: vbl += (*p->width)(p, ' ');
1.136 schwarze 232: continue;
233: }
1.216 schwarze 234: if (ASCII_BREAK == p->buf[i])
235: continue;
1.130 kristaps 236:
1.136 schwarze 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) {
1.146 kristaps 243: (*p->advance)(p, vbl);
1.139 schwarze 244: p->viscol += vbl;
1.136 schwarze 245: vbl = 0;
1.200 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]);
1.222 schwarze 251: else
1.153 kristaps 252: p->viscol += (*p->width)(p, p->buf[i]);
1.136 schwarze 253: }
254: vis = vend;
1.71 kristaps 255: }
1.168 schwarze 256:
257: /*
258: * If there was trailing white space, it was not printed;
259: * so reset the cursor position accordingly.
260: */
1.235 schwarze 261: if (vis > vbl)
1.200 schwarze 262: vis -= vbl;
1.235 schwarze 263: else
264: vis = 0;
1.111 kristaps 265:
1.91 kristaps 266: p->col = 0;
1.129 kristaps 267: p->overstep = 0;
1.15 kristaps 268:
1.91 kristaps 269: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 270: p->viscol = 0;
1.146 kristaps 271: (*p->endline)(p);
1.15 kristaps 272: return;
1.71 kristaps 273: }
1.15 kristaps 274:
1.91 kristaps 275: if (TERMP_HANG & p->flags) {
1.242 schwarze 276: p->overstep += (int)(p->offset + vis - p->rmargin +
1.222 schwarze 277: p->trailspace * (*p->width)(p, ' '));
1.91 kristaps 278:
279: /*
1.92 kristaps 280: * If we have overstepped the margin, temporarily move
281: * it to the right and flag the rest of the line to be
282: * shorter.
1.212 schwarze 283: * If there is a request to keep the columns together,
284: * allow negative overstep when the column is not full.
1.91 kristaps 285: */
1.212 schwarze 286: if (p->trailspace && p->overstep < 0)
1.129 kristaps 287: p->overstep = 0;
1.200 schwarze 288: return;
1.91 kristaps 289:
290: } else if (TERMP_DANGLE & p->flags)
291: return;
1.15 kristaps 292:
1.200 schwarze 293: /* If the column was overrun, break the line. */
1.211 schwarze 294: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.146 kristaps 295: (*p->endline)(p);
1.200 schwarze 296: p->viscol = 0;
1.91 kristaps 297: }
1.15 kristaps 298: }
299:
1.222 schwarze 300: /*
1.71 kristaps 301: * A newline only breaks an existing line; it won't assert vertical
302: * space. All data in the output buffer is flushed prior to the newline
303: * assertion.
304: */
305: void
306: term_newln(struct termp *p)
1.15 kristaps 307: {
308:
1.71 kristaps 309: p->flags |= TERMP_NOSPACE;
1.200 schwarze 310: if (p->col || p->viscol)
311: term_flushln(p);
1.16 kristaps 312: }
313:
1.71 kristaps 314: /*
315: * Asserts a vertical space (a full, empty line-break between lines).
316: * Note that if used twice, this will cause two blank spaces and so on.
317: * All data in the output buffer is flushed prior to the newline
318: * assertion.
319: */
320: void
321: term_vspace(struct termp *p)
1.16 kristaps 322: {
323:
1.62 kristaps 324: term_newln(p);
1.139 schwarze 325: p->viscol = 0;
1.202 schwarze 326: if (0 < p->skipvsp)
327: p->skipvsp--;
328: else
329: (*p->endline)(p);
1.16 kristaps 330: }
331:
1.238 schwarze 332: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 333: void
334: term_fontlast(struct termp *p)
335: {
336: enum termfont f;
337:
338: f = p->fontl;
339: p->fontl = p->fontq[p->fonti];
340: p->fontq[p->fonti] = f;
341: }
342:
1.238 schwarze 343: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 344: void
345: term_fontrepl(struct termp *p, enum termfont f)
346: {
347:
348: p->fontl = p->fontq[p->fonti];
349: p->fontq[p->fonti] = f;
350: }
351:
1.238 schwarze 352: /* Set font, save previous. */
1.125 kristaps 353: void
354: term_fontpush(struct termp *p, enum termfont f)
355: {
356:
357: p->fontl = p->fontq[p->fonti];
1.238 schwarze 358: if (++p->fonti == p->fontsz) {
359: p->fontsz += 8;
360: p->fontq = mandoc_reallocarray(p->fontq,
361: p->fontsz, sizeof(enum termfont *));
362: }
363: p->fontq[p->fonti] = f;
1.125 kristaps 364: }
365:
1.238 schwarze 366: /* Flush to make the saved pointer current again. */
1.125 kristaps 367: void
1.244 ! schwarze 368: term_fontpopq(struct termp *p, int i)
1.125 kristaps 369: {
370:
1.244 ! schwarze 371: assert(i >= 0);
! 372: if (p->fonti > i)
! 373: p->fonti = i;
1.125 kristaps 374: }
1.94 kristaps 375:
1.238 schwarze 376: /* Pop one font off the stack. */
1.125 kristaps 377: void
378: term_fontpop(struct termp *p)
379: {
380:
381: assert(p->fonti);
382: p->fonti--;
1.17 kristaps 383: }
384:
1.71 kristaps 385: /*
386: * Handle pwords, partial words, which may be either a single word or a
387: * phrase that cannot be broken down (such as a literal string). This
388: * handles word styling.
389: */
1.86 kristaps 390: void
391: term_word(struct termp *p, const char *word)
1.65 kristaps 392: {
1.214 schwarze 393: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 394: const char *seq, *cp;
1.194 kristaps 395: int sz, uc;
1.124 kristaps 396: size_t ssz;
1.184 kristaps 397: enum mandoc_esc esc;
1.100 kristaps 398:
1.133 kristaps 399: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 400: if ( ! (TERMP_KEEP & p->flags)) {
1.133 kristaps 401: bufferc(p, ' ');
1.151 schwarze 402: if (TERMP_SENTENCE & p->flags)
403: bufferc(p, ' ');
404: } else
405: bufferc(p, ASCII_NBRSP);
1.133 kristaps 406: }
1.207 schwarze 407: if (TERMP_PREKEEP & p->flags)
408: p->flags |= TERMP_KEEP;
1.65 kristaps 409:
1.71 kristaps 410: if ( ! (p->flags & TERMP_NONOSPACE))
411: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 412: else
413: p->flags |= TERMP_NOSPACE;
1.133 kristaps 414:
1.237 schwarze 415: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
1.65 kristaps 416:
1.184 kristaps 417: while ('\0' != *word) {
1.203 schwarze 418: if ('\\' != *word) {
419: if (TERMP_SKIPCHAR & p->flags) {
420: p->flags &= ~TERMP_SKIPCHAR;
421: word++;
422: continue;
423: }
1.214 schwarze 424: if (TERMP_NBRWORD & p->flags) {
425: if (' ' == *word) {
426: encode(p, nbrsp, 1);
427: word++;
428: continue;
429: }
430: ssz = strcspn(word, "\\ ");
431: } else
432: ssz = strcspn(word, "\\");
1.162 kristaps 433: encode(p, word, ssz);
1.203 schwarze 434: word += (int)ssz;
1.124 kristaps 435: continue;
1.203 schwarze 436: }
1.124 kristaps 437:
1.184 kristaps 438: word++;
439: esc = mandoc_escape(&word, &seq, &sz);
440: if (ESCAPE_ERROR == esc)
1.224 schwarze 441: continue;
1.124 kristaps 442:
1.184 kristaps 443: switch (esc) {
1.222 schwarze 444: case ESCAPE_UNICODE:
1.229 schwarze 445: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 446: break;
1.222 schwarze 447: case ESCAPE_NUMBERED:
1.233 schwarze 448: uc = mchars_num2char(seq, sz);
449: if (uc < 0)
450: continue;
1.184 kristaps 451: break;
1.222 schwarze 452: case ESCAPE_SPECIAL:
1.229 schwarze 453: if (p->enc == TERMENC_ASCII) {
454: cp = mchars_spec2str(p->symtab,
455: seq, sz, &ssz);
1.232 schwarze 456: if (cp != NULL)
1.229 schwarze 457: encode(p, cp, ssz);
458: } else {
459: uc = mchars_spec2cp(p->symtab, seq, sz);
1.230 schwarze 460: if (uc > 0)
461: encode1(p, uc);
1.229 schwarze 462: }
1.233 schwarze 463: continue;
1.222 schwarze 464: case ESCAPE_FONTBOLD:
1.125 kristaps 465: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 466: continue;
1.222 schwarze 467: case ESCAPE_FONTITALIC:
1.125 kristaps 468: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 469: continue;
1.222 schwarze 470: case ESCAPE_FONTBI:
1.209 schwarze 471: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 472: continue;
1.222 schwarze 473: case ESCAPE_FONT:
1.195 kristaps 474: /* FALLTHROUGH */
1.222 schwarze 475: case ESCAPE_FONTROMAN:
1.125 kristaps 476: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 477: continue;
1.222 schwarze 478: case ESCAPE_FONTPREV:
1.125 kristaps 479: term_fontlast(p);
1.233 schwarze 480: continue;
1.222 schwarze 481: case ESCAPE_NOSPACE:
1.203 schwarze 482: if (TERMP_SKIPCHAR & p->flags)
483: p->flags &= ~TERMP_SKIPCHAR;
484: else if ('\0' == *word)
1.237 schwarze 485: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.233 schwarze 486: continue;
1.222 schwarze 487: case ESCAPE_SKIPCHAR:
1.203 schwarze 488: p->flags |= TERMP_SKIPCHAR;
1.233 schwarze 489: continue;
1.243 schwarze 490: case ESCAPE_OVERSTRIKE:
491: cp = seq + sz;
492: while (seq < cp) {
493: if (*seq == '\\') {
494: mandoc_escape(&seq, NULL, NULL);
495: continue;
496: }
497: encode1(p, *seq++);
498: if (seq < cp)
499: encode(p, "\b", 1);
500: }
1.124 kristaps 501: default:
1.233 schwarze 502: continue;
503: }
504:
505: /*
506: * Common handling for Unicode and numbered
507: * character escape sequences.
508: */
509:
510: if (p->enc == TERMENC_ASCII) {
511: cp = ascii_uc2str(uc);
512: encode(p, cp, strlen(cp));
513: } else {
514: if ((uc < 0x20 && uc != 0x09) ||
515: (uc > 0x7E && uc < 0xA0))
516: uc = 0xFFFD;
517: encode1(p, uc);
1.124 kristaps 518: }
519: }
1.214 schwarze 520: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 521: }
522:
1.71 kristaps 523: static void
1.210 schwarze 524: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 525: {
526:
1.125 kristaps 527: if (0 == p->maxcols)
528: p->maxcols = 1024;
529: while (sz >= p->maxcols)
530: p->maxcols <<= 2;
531:
1.223 schwarze 532: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.51 kristaps 533: }
534:
1.79 kristaps 535: static void
1.125 kristaps 536: bufferc(struct termp *p, char c)
537: {
538:
539: if (p->col + 1 >= p->maxcols)
540: adjbuf(p, p->col + 1);
541:
1.188 kristaps 542: p->buf[p->col++] = c;
1.125 kristaps 543: }
544:
1.194 kristaps 545: /*
546: * See encode().
547: * Do this for a single (probably unicode) value.
548: * Does not check for non-decorated glyphs.
549: */
550: static void
551: encode1(struct termp *p, int c)
552: {
553: enum termfont f;
554:
1.203 schwarze 555: if (TERMP_SKIPCHAR & p->flags) {
556: p->flags &= ~TERMP_SKIPCHAR;
557: return;
558: }
559:
1.209 schwarze 560: if (p->col + 6 >= p->maxcols)
561: adjbuf(p, p->col + 6);
1.194 kristaps 562:
1.244 ! schwarze 563: f = p->fontq[p->fonti];
1.194 kristaps 564:
1.209 schwarze 565: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.194 kristaps 566: p->buf[p->col++] = '_';
1.209 schwarze 567: p->buf[p->col++] = 8;
568: }
569: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
570: if (ASCII_HYPH == c)
571: p->buf[p->col++] = '-';
572: else
573: p->buf[p->col++] = c;
574: p->buf[p->col++] = 8;
575: }
1.194 kristaps 576: p->buf[p->col++] = c;
577: }
578:
1.125 kristaps 579: static void
580: encode(struct termp *p, const char *word, size_t sz)
581: {
1.210 schwarze 582: size_t i;
1.188 kristaps 583:
1.203 schwarze 584: if (TERMP_SKIPCHAR & p->flags) {
585: p->flags &= ~TERMP_SKIPCHAR;
586: return;
587: }
588:
1.125 kristaps 589: /*
590: * Encode and buffer a string of characters. If the current
591: * font mode is unset, buffer directly, else encode then buffer
592: * character by character.
593: */
594:
1.244 ! schwarze 595: if (p->fontq[p->fonti] == TERMFONT_NONE) {
1.222 schwarze 596: if (p->col + sz >= p->maxcols)
1.210 schwarze 597: adjbuf(p, p->col + sz);
598: for (i = 0; i < sz; i++)
1.188 kristaps 599: p->buf[p->col++] = word[i];
1.125 kristaps 600: return;
601: }
602:
1.165 kristaps 603: /* Pre-buffer, assuming worst-case. */
604:
1.210 schwarze 605: if (p->col + 1 + (sz * 5) >= p->maxcols)
606: adjbuf(p, p->col + 1 + (sz * 5));
1.165 kristaps 607:
1.210 schwarze 608: for (i = 0; i < sz; i++) {
1.209 schwarze 609: if (ASCII_HYPH == word[i] ||
610: isgraph((unsigned char)word[i]))
611: encode1(p, word[i]);
1.125 kristaps 612: else
1.188 kristaps 613: p->buf[p->col++] = word[i];
1.79 kristaps 614: }
1.219 schwarze 615: }
616:
617: void
618: term_setwidth(struct termp *p, const char *wstr)
619: {
620: struct roffsu su;
621: size_t width;
622: int iop;
623:
1.220 schwarze 624: iop = 0;
625: width = 0;
1.219 schwarze 626: if (NULL != wstr) {
627: switch (*wstr) {
1.222 schwarze 628: case '+':
1.219 schwarze 629: iop = 1;
630: wstr++;
631: break;
1.222 schwarze 632: case '-':
1.219 schwarze 633: iop = -1;
634: wstr++;
635: break;
636: default:
637: break;
638: }
1.220 schwarze 639: if (a2roffsu(wstr, &su, SCALE_MAX))
640: width = term_hspan(p, &su);
641: else
1.219 schwarze 642: iop = 0;
643: }
644: (*p->setwidth)(p, iop, width);
1.79 kristaps 645: }
1.106 kristaps 646:
1.107 kristaps 647: size_t
1.149 kristaps 648: term_len(const struct termp *p, size_t sz)
649: {
650:
651: return((*p->width)(p, ' ') * sz);
652: }
653:
1.203 schwarze 654: static size_t
655: cond_width(const struct termp *p, int c, int *skip)
656: {
657:
658: if (*skip) {
659: (*skip) = 0;
660: return(0);
661: } else
662: return((*p->width)(p, c));
663: }
1.149 kristaps 664:
665: size_t
666: term_strlen(const struct termp *p, const char *cp)
667: {
1.184 kristaps 668: size_t sz, rsz, i;
1.233 schwarze 669: int ssz, skip, uc;
1.171 kristaps 670: const char *seq, *rhs;
1.196 kristaps 671: enum mandoc_esc esc;
1.216 schwarze 672: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
673: ASCII_BREAK, '\0' };
1.171 kristaps 674:
1.184 kristaps 675: /*
676: * Account for escaped sequences within string length
677: * calculations. This follows the logic in term_word() as we
678: * must calculate the width of produced strings.
679: */
680:
681: sz = 0;
1.203 schwarze 682: skip = 0;
1.189 kristaps 683: while ('\0' != *cp) {
684: rsz = strcspn(cp, rej);
685: for (i = 0; i < rsz; i++)
1.203 schwarze 686: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 687:
1.184 kristaps 688: switch (*cp) {
1.222 schwarze 689: case '\\':
1.189 kristaps 690: cp++;
1.196 kristaps 691: esc = mandoc_escape(&cp, &seq, &ssz);
692: if (ESCAPE_ERROR == esc)
1.224 schwarze 693: continue;
1.196 kristaps 694:
695: rhs = NULL;
696:
697: switch (esc) {
1.222 schwarze 698: case ESCAPE_UNICODE:
1.234 schwarze 699: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 700: break;
1.222 schwarze 701: case ESCAPE_NUMBERED:
1.233 schwarze 702: uc = mchars_num2char(seq, ssz);
703: if (uc < 0)
704: continue;
1.171 kristaps 705: break;
1.222 schwarze 706: case ESCAPE_SPECIAL:
1.233 schwarze 707: if (p->enc == TERMENC_ASCII) {
1.229 schwarze 708: rhs = mchars_spec2str(p->symtab,
709: seq, ssz, &rsz);
1.233 schwarze 710: if (rhs != NULL)
711: break;
712: } else {
713: uc = mchars_spec2cp(p->symtab,
1.229 schwarze 714: seq, ssz);
1.233 schwarze 715: if (uc > 0)
716: sz += cond_width(p, uc, &skip);
1.229 schwarze 717: }
1.233 schwarze 718: continue;
1.222 schwarze 719: case ESCAPE_SKIPCHAR:
1.203 schwarze 720: skip = 1;
1.243 schwarze 721: continue;
722: case ESCAPE_OVERSTRIKE:
723: rsz = 0;
724: rhs = seq + ssz;
725: while (seq < rhs) {
726: if (*seq == '\\') {
727: mandoc_escape(&seq, NULL, NULL);
728: continue;
729: }
730: i = (*p->width)(p, *seq++);
731: if (rsz < i)
732: rsz = i;
733: }
734: sz += rsz;
1.233 schwarze 735: continue;
1.171 kristaps 736: default:
1.233 schwarze 737: continue;
1.171 kristaps 738: }
1.149 kristaps 739:
1.233 schwarze 740: /*
741: * Common handling for Unicode and numbered
742: * character escape sequences.
743: */
744:
745: if (rhs == NULL) {
746: if (p->enc == TERMENC_ASCII) {
747: rhs = ascii_uc2str(uc);
748: rsz = strlen(rhs);
749: } else {
750: if ((uc < 0x20 && uc != 0x09) ||
751: (uc > 0x7E && uc < 0xA0))
752: uc = 0xFFFD;
753: sz += cond_width(p, uc, &skip);
754: continue;
755: }
756: }
1.184 kristaps 757:
1.203 schwarze 758: if (skip) {
759: skip = 0;
760: break;
761: }
1.233 schwarze 762:
763: /*
764: * Common handling for all escape sequences
765: * printing more than one character.
766: */
1.203 schwarze 767:
1.184 kristaps 768: for (i = 0; i < rsz; i++)
769: sz += (*p->width)(p, *rhs++);
770: break;
1.222 schwarze 771: case ASCII_NBRSP:
1.203 schwarze 772: sz += cond_width(p, ' ', &skip);
1.176 kristaps 773: cp++;
1.184 kristaps 774: break;
1.222 schwarze 775: case ASCII_HYPH:
1.203 schwarze 776: sz += cond_width(p, '-', &skip);
1.176 kristaps 777: cp++;
1.216 schwarze 778: /* FALLTHROUGH */
1.222 schwarze 779: case ASCII_BREAK:
1.184 kristaps 780: break;
781: default:
782: break;
783: }
1.189 kristaps 784: }
1.149 kristaps 785:
786: return(sz);
787: }
788:
1.240 schwarze 789: int
1.149 kristaps 790: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 791: {
792: double r;
1.241 schwarze 793: int ri;
1.106 kristaps 794:
1.107 kristaps 795: switch (su->unit) {
1.239 schwarze 796: case SCALE_BU:
797: r = su->scale / 40.0;
798: break;
1.222 schwarze 799: case SCALE_CM:
1.239 schwarze 800: r = su->scale * 6.0 / 2.54;
801: break;
802: case SCALE_FS:
803: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 804: break;
1.222 schwarze 805: case SCALE_IN:
1.225 schwarze 806: r = su->scale * 6.0;
1.106 kristaps 807: break;
1.239 schwarze 808: case SCALE_MM:
809: r = su->scale * 0.006;
810: break;
1.222 schwarze 811: case SCALE_PC:
1.107 kristaps 812: r = su->scale;
1.106 kristaps 813: break;
1.222 schwarze 814: case SCALE_PT:
1.239 schwarze 815: r = su->scale / 12.0;
1.106 kristaps 816: break;
1.239 schwarze 817: case SCALE_EN:
818: /* FALLTHROUGH */
819: case SCALE_EM:
820: r = su->scale * 0.6;
1.106 kristaps 821: break;
1.222 schwarze 822: case SCALE_VS:
1.107 kristaps 823: r = su->scale;
1.106 kristaps 824: break;
825: default:
1.239 schwarze 826: abort();
827: /* NOTREACHED */
1.106 kristaps 828: }
1.241 schwarze 829: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
830: return(ri < 66 ? ri : 1);
1.106 kristaps 831: }
832:
1.240 schwarze 833: int
1.149 kristaps 834: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 835: {
1.156 kristaps 836: double v;
1.108 kristaps 837:
1.225 schwarze 838: v = (*p->hspan)(p, su);
1.240 schwarze 839: return(v > 0.0 ? v + 0.0005 : v - 0.0005);
1.106 kristaps 840: }
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