Annotation of mandoc/term.c, Revision 1.238
1.238 ! schwarze 1: /* $Id: term.c,v 1.237 2014/12/02 10:08:06 schwarze Exp $ */
1.1 kristaps 2: /*
1.198 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.216 schwarze 4: * Copyright (c) 2010-2014 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 */
1.236 schwarze 104: size_t rmargin; /* the rightmost of the two margins */
1.53 kristaps 105:
1.71 kristaps 106: /*
107: * First, establish the maximum columns of "visible" content.
108: * This is usually the difference between the right-margin and
109: * an indentation, but can be, for tagged lists or columns, a
1.212 schwarze 110: * small set of values.
111: *
112: * The following unsigned-signed subtractions look strange,
113: * but they are actually correct. If the int p->overstep
114: * is negative, it gets sign extended. Subtracting that
115: * very large size_t effectively adds a small number to dv.
1.71 kristaps 116: */
1.236 schwarze 117: rmargin = p->rmargin > p->offset ? p->rmargin : p->offset;
118: dv = p->rmargin - p->offset;
1.174 schwarze 119: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 120:
1.236 schwarze 121: if (p->flags & TERMP_NOBREAK) {
122: dv = p->maxrmargin > p->offset ?
123: p->maxrmargin - p->offset : 0;
124: bp = (int)dv > p->overstep ?
125: dv - (size_t)p->overstep : 0;
126: } else
127: bp = maxvis;
1.115 kristaps 128:
1.136 schwarze 129: /*
1.200 schwarze 130: * Calculate the required amount of padding.
1.136 schwarze 131: */
1.200 schwarze 132: vbl = p->offset + p->overstep > p->viscol ?
133: p->offset + p->overstep - p->viscol : 0;
1.136 schwarze 134:
1.174 schwarze 135: vis = vend = 0;
136: i = 0;
1.115 kristaps 137:
1.188 kristaps 138: while (i < p->col) {
1.71 kristaps 139: /*
1.154 kristaps 140: * Handle literal tab characters: collapse all
141: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 142: */
1.205 schwarze 143: ntab = 0;
1.188 kristaps 144: while (i < p->col && '\t' == p->buf[i]) {
1.154 kristaps 145: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 146: vbl += vend - vis;
147: vis = vend;
1.205 schwarze 148: ntab++;
1.169 schwarze 149: i++;
1.138 schwarze 150: }
151:
152: /*
1.71 kristaps 153: * Count up visible word characters. Control sequences
154: * (starting with the CSI) aren't counted. A space
155: * generates a non-printing word, which is valid (the
156: * space is printed according to regular spacing rules).
157: */
158:
1.188 kristaps 159: for (j = i, jhy = 0; j < p->col; j++) {
1.208 schwarze 160: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.71 kristaps 161: break;
1.154 kristaps 162:
163: /* Back over the the last printed character. */
164: if (8 == p->buf[j]) {
1.153 kristaps 165: assert(j);
166: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 167: continue;
1.153 kristaps 168: }
1.154 kristaps 169:
170: /* Regular word. */
171: /* Break at the hyphen point if we overrun. */
1.222 schwarze 172: if (vend > vis && vend < bp &&
1.216 schwarze 173: (ASCII_HYPH == p->buf[j] ||
174: ASCII_BREAK == p->buf[j]))
1.154 kristaps 175: jhy = j;
176:
1.217 schwarze 177: /*
178: * Hyphenation now decided, put back a real
179: * hyphen such that we get the correct width.
180: */
181: if (ASCII_HYPH == p->buf[j])
182: p->buf[j] = '-';
183:
1.154 kristaps 184: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 185: }
1.53 kristaps 186:
1.71 kristaps 187: /*
1.81 kristaps 188: * Find out whether we would exceed the right margin.
1.136 schwarze 189: * If so, break to the next line.
1.81 kristaps 190: */
1.140 kristaps 191: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 192: vend -= vis;
1.146 kristaps 193: (*p->endline)(p);
1.201 schwarze 194: p->viscol = 0;
1.221 schwarze 195: if (TERMP_BRIND & p->flags) {
1.236 schwarze 196: vbl = rmargin;
197: vend += rmargin - p->offset;
1.201 schwarze 198: } else
1.136 schwarze 199: vbl = p->offset;
1.205 schwarze 200:
201: /* use pending tabs on the new line */
202:
203: if (0 < ntab)
204: vbl += ntab * p->tabwidth;
1.130 kristaps 205:
1.212 schwarze 206: /*
207: * Remove the p->overstep width.
208: * Again, if p->overstep is negative,
209: * sign extension does the right thing.
210: */
1.130 kristaps 211:
1.174 schwarze 212: bp += (size_t)p->overstep;
1.129 kristaps 213: p->overstep = 0;
1.71 kristaps 214: }
1.138 schwarze 215:
1.130 kristaps 216: /* Write out the [remaining] word. */
1.188 kristaps 217: for ( ; i < p->col; i++) {
1.140 kristaps 218: if (vend > bp && jhy > 0 && i > jhy)
219: break;
1.138 schwarze 220: if ('\t' == p->buf[i])
221: break;
1.136 schwarze 222: if (' ' == p->buf[i]) {
1.164 kristaps 223: j = i;
1.228 kristaps 224: while (i < p->col && ' ' == p->buf[i])
1.136 schwarze 225: i++;
1.210 schwarze 226: dv = (i - j) * (*p->width)(p, ' ');
1.172 schwarze 227: vbl += dv;
228: vend += dv;
1.71 kristaps 229: break;
1.136 schwarze 230: }
231: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 232: vbl += (*p->width)(p, ' ');
1.136 schwarze 233: continue;
234: }
1.216 schwarze 235: if (ASCII_BREAK == p->buf[i])
236: continue;
1.130 kristaps 237:
1.136 schwarze 238: /*
239: * Now we definitely know there will be
240: * printable characters to output,
241: * so write preceding white space now.
242: */
243: if (vbl) {
1.146 kristaps 244: (*p->advance)(p, vbl);
1.139 schwarze 245: p->viscol += vbl;
1.136 schwarze 246: vbl = 0;
1.200 schwarze 247: }
248:
249: (*p->letter)(p, p->buf[i]);
250: if (8 == p->buf[i])
251: p->viscol -= (*p->width)(p, p->buf[i-1]);
1.222 schwarze 252: else
1.153 kristaps 253: p->viscol += (*p->width)(p, p->buf[i]);
1.136 schwarze 254: }
255: vis = vend;
1.71 kristaps 256: }
1.168 schwarze 257:
258: /*
259: * If there was trailing white space, it was not printed;
260: * so reset the cursor position accordingly.
261: */
1.235 schwarze 262: if (vis > vbl)
1.200 schwarze 263: vis -= vbl;
1.235 schwarze 264: else
265: vis = 0;
1.111 kristaps 266:
1.91 kristaps 267: p->col = 0;
1.129 kristaps 268: p->overstep = 0;
1.15 kristaps 269:
1.91 kristaps 270: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 271: p->viscol = 0;
1.146 kristaps 272: (*p->endline)(p);
1.15 kristaps 273: return;
1.71 kristaps 274: }
1.15 kristaps 275:
1.91 kristaps 276: if (TERMP_HANG & p->flags) {
1.211 schwarze 277: p->overstep = (int)(vis - maxvis +
1.222 schwarze 278: p->trailspace * (*p->width)(p, ' '));
1.91 kristaps 279:
280: /*
1.92 kristaps 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.
1.212 schwarze 284: * If there is a request to keep the columns together,
285: * allow negative overstep when the column is not full.
1.91 kristaps 286: */
1.212 schwarze 287: if (p->trailspace && p->overstep < 0)
1.129 kristaps 288: p->overstep = 0;
1.200 schwarze 289: return;
1.91 kristaps 290:
291: } else if (TERMP_DANGLE & p->flags)
292: return;
1.15 kristaps 293:
1.200 schwarze 294: /* If the column was overrun, break the line. */
1.211 schwarze 295: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.146 kristaps 296: (*p->endline)(p);
1.200 schwarze 297: p->viscol = 0;
1.91 kristaps 298: }
1.15 kristaps 299: }
300:
1.222 schwarze 301: /*
1.71 kristaps 302: * A newline only breaks an existing line; it won't assert vertical
303: * space. All data in the output buffer is flushed prior to the newline
304: * assertion.
305: */
306: void
307: term_newln(struct termp *p)
1.15 kristaps 308: {
309:
1.71 kristaps 310: p->flags |= TERMP_NOSPACE;
1.200 schwarze 311: if (p->col || p->viscol)
312: term_flushln(p);
1.16 kristaps 313: }
314:
1.71 kristaps 315: /*
316: * Asserts a vertical space (a full, empty line-break between lines).
317: * Note that if used twice, this will cause two blank spaces and so on.
318: * All data in the output buffer is flushed prior to the newline
319: * assertion.
320: */
321: void
322: term_vspace(struct termp *p)
1.16 kristaps 323: {
324:
1.62 kristaps 325: term_newln(p);
1.139 schwarze 326: p->viscol = 0;
1.202 schwarze 327: if (0 < p->skipvsp)
328: p->skipvsp--;
329: else
330: (*p->endline)(p);
1.16 kristaps 331: }
332:
1.238 ! schwarze 333: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 334: void
335: term_fontlast(struct termp *p)
336: {
337: enum termfont f;
338:
339: f = p->fontl;
340: p->fontl = p->fontq[p->fonti];
341: p->fontq[p->fonti] = f;
342: }
343:
1.238 ! schwarze 344: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 345: void
346: term_fontrepl(struct termp *p, enum termfont f)
347: {
348:
349: p->fontl = p->fontq[p->fonti];
350: p->fontq[p->fonti] = f;
351: }
352:
1.238 ! schwarze 353: /* Set font, save previous. */
1.125 kristaps 354: void
355: term_fontpush(struct termp *p, enum termfont f)
356: {
357:
358: p->fontl = p->fontq[p->fonti];
1.238 ! schwarze 359: if (++p->fonti == p->fontsz) {
! 360: p->fontsz += 8;
! 361: p->fontq = mandoc_reallocarray(p->fontq,
! 362: p->fontsz, sizeof(enum termfont *));
! 363: }
! 364: p->fontq[p->fonti] = f;
1.125 kristaps 365: }
366:
1.238 ! schwarze 367: /* Retrieve pointer to current font. */
! 368: const enum termfont *
1.125 kristaps 369: term_fontq(struct termp *p)
370: {
371:
372: return(&p->fontq[p->fonti]);
373: }
374:
1.238 ! schwarze 375: /* Flush to make the saved pointer current again. */
1.125 kristaps 376: void
1.238 ! schwarze 377: term_fontpopq(struct termp *p, const enum termfont *key)
1.125 kristaps 378: {
379:
1.238 ! schwarze 380: while (p->fonti >= 0 && key < p->fontq + p->fonti)
1.125 kristaps 381: p->fonti--;
382: assert(p->fonti >= 0);
383: }
1.94 kristaps 384:
1.238 ! schwarze 385: /* Pop one font off the stack. */
1.125 kristaps 386: void
387: term_fontpop(struct termp *p)
388: {
389:
390: assert(p->fonti);
391: p->fonti--;
1.17 kristaps 392: }
393:
1.71 kristaps 394: /*
395: * Handle pwords, partial words, which may be either a single word or a
396: * phrase that cannot be broken down (such as a literal string). This
397: * handles word styling.
398: */
1.86 kristaps 399: void
400: term_word(struct termp *p, const char *word)
1.65 kristaps 401: {
1.214 schwarze 402: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 403: const char *seq, *cp;
1.194 kristaps 404: int sz, uc;
1.124 kristaps 405: size_t ssz;
1.184 kristaps 406: enum mandoc_esc esc;
1.100 kristaps 407:
1.133 kristaps 408: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 409: if ( ! (TERMP_KEEP & p->flags)) {
1.133 kristaps 410: bufferc(p, ' ');
1.151 schwarze 411: if (TERMP_SENTENCE & p->flags)
412: bufferc(p, ' ');
413: } else
414: bufferc(p, ASCII_NBRSP);
1.133 kristaps 415: }
1.207 schwarze 416: if (TERMP_PREKEEP & p->flags)
417: p->flags |= TERMP_KEEP;
1.65 kristaps 418:
1.71 kristaps 419: if ( ! (p->flags & TERMP_NONOSPACE))
420: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 421: else
422: p->flags |= TERMP_NOSPACE;
1.133 kristaps 423:
1.237 schwarze 424: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
1.65 kristaps 425:
1.184 kristaps 426: while ('\0' != *word) {
1.203 schwarze 427: if ('\\' != *word) {
428: if (TERMP_SKIPCHAR & p->flags) {
429: p->flags &= ~TERMP_SKIPCHAR;
430: word++;
431: continue;
432: }
1.214 schwarze 433: if (TERMP_NBRWORD & p->flags) {
434: if (' ' == *word) {
435: encode(p, nbrsp, 1);
436: word++;
437: continue;
438: }
439: ssz = strcspn(word, "\\ ");
440: } else
441: ssz = strcspn(word, "\\");
1.162 kristaps 442: encode(p, word, ssz);
1.203 schwarze 443: word += (int)ssz;
1.124 kristaps 444: continue;
1.203 schwarze 445: }
1.124 kristaps 446:
1.184 kristaps 447: word++;
448: esc = mandoc_escape(&word, &seq, &sz);
449: if (ESCAPE_ERROR == esc)
1.224 schwarze 450: continue;
1.124 kristaps 451:
1.184 kristaps 452: switch (esc) {
1.222 schwarze 453: case ESCAPE_UNICODE:
1.229 schwarze 454: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 455: break;
1.222 schwarze 456: case ESCAPE_NUMBERED:
1.233 schwarze 457: uc = mchars_num2char(seq, sz);
458: if (uc < 0)
459: continue;
1.184 kristaps 460: break;
1.222 schwarze 461: case ESCAPE_SPECIAL:
1.229 schwarze 462: if (p->enc == TERMENC_ASCII) {
463: cp = mchars_spec2str(p->symtab,
464: seq, sz, &ssz);
1.232 schwarze 465: if (cp != NULL)
1.229 schwarze 466: encode(p, cp, ssz);
467: } else {
468: uc = mchars_spec2cp(p->symtab, seq, sz);
1.230 schwarze 469: if (uc > 0)
470: encode1(p, uc);
1.229 schwarze 471: }
1.233 schwarze 472: continue;
1.222 schwarze 473: case ESCAPE_FONTBOLD:
1.125 kristaps 474: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 475: continue;
1.222 schwarze 476: case ESCAPE_FONTITALIC:
1.125 kristaps 477: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 478: continue;
1.222 schwarze 479: case ESCAPE_FONTBI:
1.209 schwarze 480: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 481: continue;
1.222 schwarze 482: case ESCAPE_FONT:
1.195 kristaps 483: /* FALLTHROUGH */
1.222 schwarze 484: case ESCAPE_FONTROMAN:
1.125 kristaps 485: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 486: continue;
1.222 schwarze 487: case ESCAPE_FONTPREV:
1.125 kristaps 488: term_fontlast(p);
1.233 schwarze 489: continue;
1.222 schwarze 490: case ESCAPE_NOSPACE:
1.203 schwarze 491: if (TERMP_SKIPCHAR & p->flags)
492: p->flags &= ~TERMP_SKIPCHAR;
493: else if ('\0' == *word)
1.237 schwarze 494: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.233 schwarze 495: continue;
1.222 schwarze 496: case ESCAPE_SKIPCHAR:
1.203 schwarze 497: p->flags |= TERMP_SKIPCHAR;
1.233 schwarze 498: continue;
1.124 kristaps 499: default:
1.233 schwarze 500: continue;
501: }
502:
503: /*
504: * Common handling for Unicode and numbered
505: * character escape sequences.
506: */
507:
508: if (p->enc == TERMENC_ASCII) {
509: cp = ascii_uc2str(uc);
510: encode(p, cp, strlen(cp));
511: } else {
512: if ((uc < 0x20 && uc != 0x09) ||
513: (uc > 0x7E && uc < 0xA0))
514: uc = 0xFFFD;
515: encode1(p, uc);
1.124 kristaps 516: }
517: }
1.214 schwarze 518: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 519: }
520:
1.71 kristaps 521: static void
1.210 schwarze 522: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 523: {
524:
1.125 kristaps 525: if (0 == p->maxcols)
526: p->maxcols = 1024;
527: while (sz >= p->maxcols)
528: p->maxcols <<= 2;
529:
1.223 schwarze 530: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.51 kristaps 531: }
532:
1.79 kristaps 533: static void
1.125 kristaps 534: bufferc(struct termp *p, char c)
535: {
536:
537: if (p->col + 1 >= p->maxcols)
538: adjbuf(p, p->col + 1);
539:
1.188 kristaps 540: p->buf[p->col++] = c;
1.125 kristaps 541: }
542:
1.194 kristaps 543: /*
544: * See encode().
545: * Do this for a single (probably unicode) value.
546: * Does not check for non-decorated glyphs.
547: */
548: static void
549: encode1(struct termp *p, int c)
550: {
551: enum termfont f;
552:
1.203 schwarze 553: if (TERMP_SKIPCHAR & p->flags) {
554: p->flags &= ~TERMP_SKIPCHAR;
555: return;
556: }
557:
1.209 schwarze 558: if (p->col + 6 >= p->maxcols)
559: adjbuf(p, p->col + 6);
1.194 kristaps 560:
1.238 ! schwarze 561: f = *term_fontq(p);
1.194 kristaps 562:
1.209 schwarze 563: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.194 kristaps 564: p->buf[p->col++] = '_';
1.209 schwarze 565: p->buf[p->col++] = 8;
566: }
567: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
568: if (ASCII_HYPH == c)
569: p->buf[p->col++] = '-';
570: else
571: p->buf[p->col++] = c;
572: p->buf[p->col++] = 8;
573: }
1.194 kristaps 574: p->buf[p->col++] = c;
575: }
576:
1.125 kristaps 577: static void
578: encode(struct termp *p, const char *word, size_t sz)
579: {
1.210 schwarze 580: size_t i;
1.188 kristaps 581:
1.203 schwarze 582: if (TERMP_SKIPCHAR & p->flags) {
583: p->flags &= ~TERMP_SKIPCHAR;
584: return;
585: }
586:
1.125 kristaps 587: /*
588: * Encode and buffer a string of characters. If the current
589: * font mode is unset, buffer directly, else encode then buffer
590: * character by character.
591: */
592:
1.238 ! schwarze 593: if (*term_fontq(p) == TERMFONT_NONE) {
1.222 schwarze 594: if (p->col + sz >= p->maxcols)
1.210 schwarze 595: adjbuf(p, p->col + sz);
596: for (i = 0; i < sz; i++)
1.188 kristaps 597: p->buf[p->col++] = word[i];
1.125 kristaps 598: return;
599: }
600:
1.165 kristaps 601: /* Pre-buffer, assuming worst-case. */
602:
1.210 schwarze 603: if (p->col + 1 + (sz * 5) >= p->maxcols)
604: adjbuf(p, p->col + 1 + (sz * 5));
1.165 kristaps 605:
1.210 schwarze 606: for (i = 0; i < sz; i++) {
1.209 schwarze 607: if (ASCII_HYPH == word[i] ||
608: isgraph((unsigned char)word[i]))
609: encode1(p, word[i]);
1.125 kristaps 610: else
1.188 kristaps 611: p->buf[p->col++] = word[i];
1.79 kristaps 612: }
1.219 schwarze 613: }
614:
615: void
616: term_setwidth(struct termp *p, const char *wstr)
617: {
618: struct roffsu su;
619: size_t width;
620: int iop;
621:
1.220 schwarze 622: iop = 0;
623: width = 0;
1.219 schwarze 624: if (NULL != wstr) {
625: switch (*wstr) {
1.222 schwarze 626: case '+':
1.219 schwarze 627: iop = 1;
628: wstr++;
629: break;
1.222 schwarze 630: case '-':
1.219 schwarze 631: iop = -1;
632: wstr++;
633: break;
634: default:
635: break;
636: }
1.220 schwarze 637: if (a2roffsu(wstr, &su, SCALE_MAX))
638: width = term_hspan(p, &su);
639: else
1.219 schwarze 640: iop = 0;
641: }
642: (*p->setwidth)(p, iop, width);
1.79 kristaps 643: }
1.106 kristaps 644:
1.107 kristaps 645: size_t
1.149 kristaps 646: term_len(const struct termp *p, size_t sz)
647: {
648:
649: return((*p->width)(p, ' ') * sz);
650: }
651:
1.203 schwarze 652: static size_t
653: cond_width(const struct termp *p, int c, int *skip)
654: {
655:
656: if (*skip) {
657: (*skip) = 0;
658: return(0);
659: } else
660: return((*p->width)(p, c));
661: }
1.149 kristaps 662:
663: size_t
664: term_strlen(const struct termp *p, const char *cp)
665: {
1.184 kristaps 666: size_t sz, rsz, i;
1.233 schwarze 667: int ssz, skip, uc;
1.171 kristaps 668: const char *seq, *rhs;
1.196 kristaps 669: enum mandoc_esc esc;
1.216 schwarze 670: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
671: ASCII_BREAK, '\0' };
1.171 kristaps 672:
1.184 kristaps 673: /*
674: * Account for escaped sequences within string length
675: * calculations. This follows the logic in term_word() as we
676: * must calculate the width of produced strings.
677: */
678:
679: sz = 0;
1.203 schwarze 680: skip = 0;
1.189 kristaps 681: while ('\0' != *cp) {
682: rsz = strcspn(cp, rej);
683: for (i = 0; i < rsz; i++)
1.203 schwarze 684: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 685:
1.184 kristaps 686: switch (*cp) {
1.222 schwarze 687: case '\\':
1.189 kristaps 688: cp++;
1.196 kristaps 689: esc = mandoc_escape(&cp, &seq, &ssz);
690: if (ESCAPE_ERROR == esc)
1.224 schwarze 691: continue;
1.196 kristaps 692:
693: rhs = NULL;
694:
695: switch (esc) {
1.222 schwarze 696: case ESCAPE_UNICODE:
1.234 schwarze 697: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 698: break;
1.222 schwarze 699: case ESCAPE_NUMBERED:
1.233 schwarze 700: uc = mchars_num2char(seq, ssz);
701: if (uc < 0)
702: continue;
1.171 kristaps 703: break;
1.222 schwarze 704: case ESCAPE_SPECIAL:
1.233 schwarze 705: if (p->enc == TERMENC_ASCII) {
1.229 schwarze 706: rhs = mchars_spec2str(p->symtab,
707: seq, ssz, &rsz);
1.233 schwarze 708: if (rhs != NULL)
709: break;
710: } else {
711: uc = mchars_spec2cp(p->symtab,
1.229 schwarze 712: seq, ssz);
1.233 schwarze 713: if (uc > 0)
714: sz += cond_width(p, uc, &skip);
1.229 schwarze 715: }
1.233 schwarze 716: continue;
1.222 schwarze 717: case ESCAPE_SKIPCHAR:
1.203 schwarze 718: skip = 1;
1.233 schwarze 719: continue;
1.171 kristaps 720: default:
1.233 schwarze 721: continue;
1.171 kristaps 722: }
1.149 kristaps 723:
1.233 schwarze 724: /*
725: * Common handling for Unicode and numbered
726: * character escape sequences.
727: */
728:
729: if (rhs == NULL) {
730: if (p->enc == TERMENC_ASCII) {
731: rhs = ascii_uc2str(uc);
732: rsz = strlen(rhs);
733: } else {
734: if ((uc < 0x20 && uc != 0x09) ||
735: (uc > 0x7E && uc < 0xA0))
736: uc = 0xFFFD;
737: sz += cond_width(p, uc, &skip);
738: continue;
739: }
740: }
1.184 kristaps 741:
1.203 schwarze 742: if (skip) {
743: skip = 0;
744: break;
745: }
1.233 schwarze 746:
747: /*
748: * Common handling for all escape sequences
749: * printing more than one character.
750: */
1.203 schwarze 751:
1.184 kristaps 752: for (i = 0; i < rsz; i++)
753: sz += (*p->width)(p, *rhs++);
754: break;
1.222 schwarze 755: case ASCII_NBRSP:
1.203 schwarze 756: sz += cond_width(p, ' ', &skip);
1.176 kristaps 757: cp++;
1.184 kristaps 758: break;
1.222 schwarze 759: case ASCII_HYPH:
1.203 schwarze 760: sz += cond_width(p, '-', &skip);
1.176 kristaps 761: cp++;
1.216 schwarze 762: /* FALLTHROUGH */
1.222 schwarze 763: case ASCII_BREAK:
1.184 kristaps 764: break;
765: default:
766: break;
767: }
1.189 kristaps 768: }
1.149 kristaps 769:
770: return(sz);
771: }
772:
773: size_t
774: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 775: {
776: double r;
777:
1.107 kristaps 778: switch (su->unit) {
1.222 schwarze 779: case SCALE_CM:
1.225 schwarze 780: r = su->scale * 2.0;
1.106 kristaps 781: break;
1.222 schwarze 782: case SCALE_IN:
1.225 schwarze 783: r = su->scale * 6.0;
1.106 kristaps 784: break;
1.222 schwarze 785: case SCALE_PC:
1.107 kristaps 786: r = su->scale;
1.106 kristaps 787: break;
1.222 schwarze 788: case SCALE_PT:
1.225 schwarze 789: r = su->scale / 8.0;
1.106 kristaps 790: break;
1.222 schwarze 791: case SCALE_MM:
1.225 schwarze 792: r = su->scale / 1000.0;
1.106 kristaps 793: break;
1.222 schwarze 794: case SCALE_VS:
1.107 kristaps 795: r = su->scale;
1.106 kristaps 796: break;
797: default:
1.225 schwarze 798: r = su->scale - 1.0;
1.106 kristaps 799: break;
800: }
801:
802: if (r < 0.0)
803: r = 0.0;
1.226 schwarze 804: return((size_t)(r + 0.0005));
1.106 kristaps 805: }
806:
1.107 kristaps 807: size_t
1.149 kristaps 808: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 809: {
1.156 kristaps 810: double v;
1.108 kristaps 811:
1.225 schwarze 812: v = (*p->hspan)(p, su);
1.156 kristaps 813: if (v < 0.0)
814: v = 0.0;
1.226 schwarze 815: return((size_t)(v + 0.0005));
1.106 kristaps 816: }
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