Annotation of mandoc/term.c, Revision 1.204
1.204 ! schwarze 1: /* $Id: term.c,v 1.203 2012/05/31 22:29:13 schwarze Exp $ */
1.1 kristaps 2: /*
1.198 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.202 schwarze 4: * Copyright (c) 2010, 2011, 2012 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: #ifdef HAVE_CONFIG_H
19: #include "config.h"
20: #endif
21:
1.126 kristaps 22: #include <sys/types.h>
23:
1.1 kristaps 24: #include <assert.h>
1.122 kristaps 25: #include <ctype.h>
1.141 kristaps 26: #include <stdint.h>
1.22 kristaps 27: #include <stdio.h>
1.1 kristaps 28: #include <stdlib.h>
29: #include <string.h>
30:
1.137 kristaps 31: #include "mandoc.h"
1.107 kristaps 32: #include "out.h"
1.71 kristaps 33: #include "term.h"
1.105 kristaps 34: #include "main.h"
1.1 kristaps 35:
1.203 schwarze 36: static size_t cond_width(const struct termp *, int, int *);
1.191 kristaps 37: static void adjbuf(struct termp *p, int);
38: static void bufferc(struct termp *, char);
39: static void encode(struct termp *, const char *, size_t);
1.194 kristaps 40: static void encode1(struct termp *, int);
1.11 kristaps 41:
1.145 kristaps 42: void
1.71 kristaps 43: term_free(struct termp *p)
1.14 kristaps 44: {
45:
1.71 kristaps 46: if (p->buf)
47: free(p->buf);
1.102 kristaps 48: if (p->symtab)
1.185 kristaps 49: mchars_free(p->symtab);
1.145 kristaps 50:
1.142 kristaps 51: free(p);
52: }
53:
54:
55: void
56: term_begin(struct termp *p, term_margin head,
57: term_margin foot, const void *arg)
58: {
59:
60: p->headf = head;
61: p->footf = foot;
62: p->argf = arg;
1.146 kristaps 63: (*p->begin)(p);
1.142 kristaps 64: }
65:
66:
67: void
68: term_end(struct termp *p)
69: {
70:
1.146 kristaps 71: (*p->end)(p);
1.14 kristaps 72: }
73:
1.71 kristaps 74: /*
75: * Flush a line of text. A "line" is loosely defined as being something
76: * that should be followed by a newline, regardless of whether it's
77: * broken apart by newlines getting there. A line can also be a
1.130 kristaps 78: * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
79: * not have a trailing newline.
1.71 kristaps 80: *
1.130 kristaps 81: * The following flags may be specified:
1.71 kristaps 82: *
83: * - TERMP_NOBREAK: this is the most important and is used when making
1.200 schwarze 84: * columns. In short: don't print a newline and instead expect the
85: * next call to do the padding up to the start of the next column.
1.71 kristaps 86: *
1.200 schwarze 87: * - TERMP_TWOSPACE: make sure there is room for at least two space
88: * characters of padding. Otherwise, rather break the line.
1.91 kristaps 89: *
1.84 kristaps 90: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
91: * the line is overrun, and don't pad-right if it's underrun.
92: *
93: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
1.200 schwarze 94: * overrunning, instead save the position and continue at that point
1.84 kristaps 95: * when the next invocation.
1.71 kristaps 96: *
97: * In-line line breaking:
98: *
99: * If TERMP_NOBREAK is specified and the line overruns the right
100: * margin, it will break and pad-right to the right margin after
101: * writing. If maxrmargin is violated, it will break and continue
1.114 kristaps 102: * writing from the right-margin, which will lead to the above scenario
103: * upon exit. Otherwise, the line will break at the right margin.
1.71 kristaps 104: */
105: void
106: term_flushln(struct termp *p)
1.53 kristaps 107: {
1.114 kristaps 108: int i; /* current input position in p->buf */
109: size_t vis; /* current visual position on output */
110: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 111: size_t vend; /* end of word visual position on output */
1.114 kristaps 112: size_t bp; /* visual right border position */
1.172 schwarze 113: size_t dv; /* temporary for visual pos calculations */
1.152 kristaps 114: int j; /* temporary loop index for p->buf */
115: int jhy; /* last hyph before overflow w/r/t j */
116: size_t maxvis; /* output position of visible boundary */
117: size_t mmax; /* used in calculating bp */
1.53 kristaps 118:
1.71 kristaps 119: /*
120: * First, establish the maximum columns of "visible" content.
121: * This is usually the difference between the right-margin and
122: * an indentation, but can be, for tagged lists or columns, a
1.115 kristaps 123: * small set of values.
1.71 kristaps 124: */
1.175 kristaps 125: assert (p->rmargin >= p->offset);
1.174 schwarze 126: dv = p->rmargin - p->offset;
127: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
128: dv = p->maxrmargin - p->offset;
129: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 130:
1.71 kristaps 131: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 132:
1.136 schwarze 133: /*
1.200 schwarze 134: * Calculate the required amount of padding.
1.136 schwarze 135: */
1.200 schwarze 136: vbl = p->offset + p->overstep > p->viscol ?
137: p->offset + p->overstep - p->viscol : 0;
1.136 schwarze 138:
1.174 schwarze 139: vis = vend = 0;
140: i = 0;
1.115 kristaps 141:
1.188 kristaps 142: while (i < p->col) {
1.71 kristaps 143: /*
1.154 kristaps 144: * Handle literal tab characters: collapse all
145: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 146: */
1.188 kristaps 147: while (i < p->col && '\t' == p->buf[i]) {
1.154 kristaps 148: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 149: vbl += vend - vis;
150: vis = vend;
1.169 schwarze 151: i++;
1.138 schwarze 152: }
153:
154: /*
1.71 kristaps 155: * Count up visible word characters. Control sequences
156: * (starting with the CSI) aren't counted. A space
157: * generates a non-printing word, which is valid (the
158: * space is printed according to regular spacing rules).
159: */
160:
1.188 kristaps 161: for (j = i, jhy = 0; j < p->col; j++) {
1.138 schwarze 162: if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
1.71 kristaps 163: break;
1.154 kristaps 164:
165: /* Back over the the last printed character. */
166: if (8 == p->buf[j]) {
1.153 kristaps 167: assert(j);
168: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 169: continue;
1.153 kristaps 170: }
1.154 kristaps 171:
172: /* Regular word. */
173: /* Break at the hyphen point if we overrun. */
174: if (vend > vis && vend < bp &&
175: ASCII_HYPH == p->buf[j])
176: jhy = j;
177:
178: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 179: }
1.53 kristaps 180:
1.71 kristaps 181: /*
1.81 kristaps 182: * Find out whether we would exceed the right margin.
1.136 schwarze 183: * If so, break to the next line.
1.81 kristaps 184: */
1.140 kristaps 185: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 186: vend -= vis;
1.146 kristaps 187: (*p->endline)(p);
1.201 schwarze 188: p->viscol = 0;
1.81 kristaps 189: if (TERMP_NOBREAK & p->flags) {
1.201 schwarze 190: vbl = p->rmargin;
1.136 schwarze 191: vend += p->rmargin - p->offset;
1.201 schwarze 192: } else
1.136 schwarze 193: vbl = p->offset;
1.130 kristaps 194:
1.129 kristaps 195: /* Remove the p->overstep width. */
1.130 kristaps 196:
1.174 schwarze 197: bp += (size_t)p->overstep;
1.129 kristaps 198: p->overstep = 0;
1.71 kristaps 199: }
1.138 schwarze 200:
1.130 kristaps 201: /* Write out the [remaining] word. */
1.188 kristaps 202: for ( ; i < p->col; i++) {
1.140 kristaps 203: if (vend > bp && jhy > 0 && i > jhy)
204: break;
1.138 schwarze 205: if ('\t' == p->buf[i])
206: break;
1.136 schwarze 207: if (' ' == p->buf[i]) {
1.164 kristaps 208: j = i;
209: while (' ' == p->buf[i])
1.136 schwarze 210: i++;
1.174 schwarze 211: dv = (size_t)(i - j) * (*p->width)(p, ' ');
1.172 schwarze 212: vbl += dv;
213: vend += dv;
1.71 kristaps 214: break;
1.136 schwarze 215: }
216: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 217: vbl += (*p->width)(p, ' ');
1.136 schwarze 218: continue;
219: }
1.130 kristaps 220:
1.136 schwarze 221: /*
222: * Now we definitely know there will be
223: * printable characters to output,
224: * so write preceding white space now.
225: */
226: if (vbl) {
1.146 kristaps 227: (*p->advance)(p, vbl);
1.139 schwarze 228: p->viscol += vbl;
1.136 schwarze 229: vbl = 0;
230: }
1.140 kristaps 231:
1.153 kristaps 232: if (ASCII_HYPH == p->buf[i]) {
1.146 kristaps 233: (*p->letter)(p, '-');
1.153 kristaps 234: p->viscol += (*p->width)(p, '-');
1.200 schwarze 235: continue;
236: }
237:
238: (*p->letter)(p, p->buf[i]);
239: if (8 == p->buf[i])
240: p->viscol -= (*p->width)(p, p->buf[i-1]);
241: else
1.153 kristaps 242: p->viscol += (*p->width)(p, p->buf[i]);
1.136 schwarze 243: }
244: vis = vend;
1.71 kristaps 245: }
1.168 schwarze 246:
247: /*
248: * If there was trailing white space, it was not printed;
249: * so reset the cursor position accordingly.
250: */
1.200 schwarze 251: if (vis)
252: vis -= vbl;
1.111 kristaps 253:
1.91 kristaps 254: p->col = 0;
1.129 kristaps 255: p->overstep = 0;
1.15 kristaps 256:
1.91 kristaps 257: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 258: p->viscol = 0;
1.146 kristaps 259: (*p->endline)(p);
1.15 kristaps 260: return;
1.71 kristaps 261: }
1.15 kristaps 262:
1.91 kristaps 263: if (TERMP_HANG & p->flags) {
264: /* We need one blank after the tag. */
1.174 schwarze 265: p->overstep = (int)(vis - maxvis + (*p->width)(p, ' '));
1.91 kristaps 266:
267: /*
1.92 kristaps 268: * If we have overstepped the margin, temporarily move
269: * it to the right and flag the rest of the line to be
270: * shorter.
1.91 kristaps 271: */
1.204 ! schwarze 272: if (p->overstep < 0)
1.129 kristaps 273: p->overstep = 0;
1.200 schwarze 274: return;
1.91 kristaps 275:
276: } else if (TERMP_DANGLE & p->flags)
277: return;
1.15 kristaps 278:
1.200 schwarze 279: /* If the column was overrun, break the line. */
280: if (maxvis <= vis +
1.174 schwarze 281: ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
1.146 kristaps 282: (*p->endline)(p);
1.200 schwarze 283: p->viscol = 0;
1.91 kristaps 284: }
1.15 kristaps 285: }
286:
287:
1.71 kristaps 288: /*
289: * A newline only breaks an existing line; it won't assert vertical
290: * space. All data in the output buffer is flushed prior to the newline
291: * assertion.
292: */
293: void
294: term_newln(struct termp *p)
1.15 kristaps 295: {
296:
1.71 kristaps 297: p->flags |= TERMP_NOSPACE;
1.200 schwarze 298: if (p->col || p->viscol)
299: term_flushln(p);
1.16 kristaps 300: }
301:
302:
1.71 kristaps 303: /*
304: * Asserts a vertical space (a full, empty line-break between lines).
305: * Note that if used twice, this will cause two blank spaces and so on.
306: * All data in the output buffer is flushed prior to the newline
307: * assertion.
308: */
309: void
310: term_vspace(struct termp *p)
1.16 kristaps 311: {
312:
1.62 kristaps 313: term_newln(p);
1.139 schwarze 314: p->viscol = 0;
1.202 schwarze 315: if (0 < p->skipvsp)
316: p->skipvsp--;
317: else
318: (*p->endline)(p);
1.16 kristaps 319: }
320:
1.125 kristaps 321: void
322: term_fontlast(struct termp *p)
323: {
324: enum termfont f;
325:
326: f = p->fontl;
327: p->fontl = p->fontq[p->fonti];
328: p->fontq[p->fonti] = f;
329: }
330:
331:
332: void
333: term_fontrepl(struct termp *p, enum termfont f)
334: {
335:
336: p->fontl = p->fontq[p->fonti];
337: p->fontq[p->fonti] = f;
338: }
339:
340:
341: void
342: term_fontpush(struct termp *p, enum termfont f)
343: {
344:
345: assert(p->fonti + 1 < 10);
346: p->fontl = p->fontq[p->fonti];
347: p->fontq[++p->fonti] = f;
348: }
349:
350:
351: const void *
352: term_fontq(struct termp *p)
353: {
354:
355: return(&p->fontq[p->fonti]);
356: }
357:
358:
359: enum termfont
360: term_fonttop(struct termp *p)
361: {
362:
363: return(p->fontq[p->fonti]);
364: }
365:
366:
367: void
368: term_fontpopq(struct termp *p, const void *key)
369: {
370:
371: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
372: p->fonti--;
373: assert(p->fonti >= 0);
374: }
1.94 kristaps 375:
1.125 kristaps 376:
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: {
1.191 kristaps 393: const char *seq, *cp;
394: char c;
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)) {
401: if (TERMP_PREKEEP & p->flags)
402: p->flags |= TERMP_KEEP;
1.133 kristaps 403: bufferc(p, ' ');
1.151 schwarze 404: if (TERMP_SENTENCE & p->flags)
405: bufferc(p, ' ');
406: } else
407: bufferc(p, ASCII_NBRSP);
1.133 kristaps 408: }
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:
1.173 schwarze 415: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
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: }
424: ssz = strcspn(word, "\\");
1.162 kristaps 425: encode(p, word, ssz);
1.203 schwarze 426: word += (int)ssz;
1.124 kristaps 427: continue;
1.203 schwarze 428: }
1.124 kristaps 429:
1.184 kristaps 430: word++;
431: esc = mandoc_escape(&word, &seq, &sz);
432: if (ESCAPE_ERROR == esc)
433: break;
1.124 kristaps 434:
1.196 kristaps 435: if (TERMENC_ASCII != p->enc)
436: switch (esc) {
437: case (ESCAPE_UNICODE):
438: uc = mchars_num2uc(seq + 1, sz - 1);
439: if ('\0' == uc)
440: break;
441: encode1(p, uc);
442: continue;
443: case (ESCAPE_SPECIAL):
444: uc = mchars_spec2cp(p->symtab, seq, sz);
445: if (uc <= 0)
446: break;
447: encode1(p, uc);
448: continue;
449: default:
450: break;
451: }
452:
1.184 kristaps 453: switch (esc) {
1.192 kristaps 454: case (ESCAPE_UNICODE):
1.196 kristaps 455: encode1(p, '?');
1.192 kristaps 456: break;
1.184 kristaps 457: case (ESCAPE_NUMBERED):
1.196 kristaps 458: c = mchars_num2char(seq, sz);
459: if ('\0' != c)
1.191 kristaps 460: encode(p, &c, 1);
1.184 kristaps 461: break;
462: case (ESCAPE_SPECIAL):
1.191 kristaps 463: cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
464: if (NULL != cp)
465: encode(p, cp, ssz);
466: else if (1 == ssz)
467: encode(p, seq, sz);
1.124 kristaps 468: break;
1.184 kristaps 469: case (ESCAPE_FONTBOLD):
1.125 kristaps 470: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 471: break;
1.184 kristaps 472: case (ESCAPE_FONTITALIC):
1.125 kristaps 473: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 474: break;
1.195 kristaps 475: case (ESCAPE_FONT):
476: /* FALLTHROUGH */
1.184 kristaps 477: case (ESCAPE_FONTROMAN):
1.125 kristaps 478: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 479: break;
1.184 kristaps 480: case (ESCAPE_FONTPREV):
1.125 kristaps 481: term_fontlast(p);
1.124 kristaps 482: break;
1.184 kristaps 483: case (ESCAPE_NOSPACE):
1.203 schwarze 484: if (TERMP_SKIPCHAR & p->flags)
485: p->flags &= ~TERMP_SKIPCHAR;
486: else if ('\0' == *word)
1.184 kristaps 487: p->flags |= TERMP_NOSPACE;
488: break;
1.203 schwarze 489: case (ESCAPE_SKIPCHAR):
490: p->flags |= TERMP_SKIPCHAR;
491: break;
1.124 kristaps 492: default:
493: break;
494: }
495: }
1.65 kristaps 496: }
497:
1.71 kristaps 498: static void
1.188 kristaps 499: adjbuf(struct termp *p, int sz)
1.51 kristaps 500: {
501:
1.125 kristaps 502: if (0 == p->maxcols)
503: p->maxcols = 1024;
504: while (sz >= p->maxcols)
505: p->maxcols <<= 2;
506:
1.188 kristaps 507: p->buf = mandoc_realloc
508: (p->buf, sizeof(int) * (size_t)p->maxcols);
1.51 kristaps 509: }
510:
1.79 kristaps 511: static void
1.125 kristaps 512: bufferc(struct termp *p, char c)
513: {
514:
515: if (p->col + 1 >= p->maxcols)
516: adjbuf(p, p->col + 1);
517:
1.188 kristaps 518: p->buf[p->col++] = c;
1.125 kristaps 519: }
520:
1.194 kristaps 521: /*
522: * See encode().
523: * Do this for a single (probably unicode) value.
524: * Does not check for non-decorated glyphs.
525: */
526: static void
527: encode1(struct termp *p, int c)
528: {
529: enum termfont f;
530:
1.203 schwarze 531: if (TERMP_SKIPCHAR & p->flags) {
532: p->flags &= ~TERMP_SKIPCHAR;
533: return;
534: }
535:
1.194 kristaps 536: if (p->col + 4 >= p->maxcols)
537: adjbuf(p, p->col + 4);
538:
539: f = term_fonttop(p);
540:
541: if (TERMFONT_NONE == f) {
542: p->buf[p->col++] = c;
543: return;
544: } else if (TERMFONT_UNDER == f) {
545: p->buf[p->col++] = '_';
546: } else
547: p->buf[p->col++] = c;
548:
549: p->buf[p->col++] = 8;
550: p->buf[p->col++] = c;
551: }
552:
1.125 kristaps 553: static void
554: encode(struct termp *p, const char *word, size_t sz)
555: {
556: enum termfont f;
1.188 kristaps 557: int i, len;
558:
1.203 schwarze 559: if (TERMP_SKIPCHAR & p->flags) {
560: p->flags &= ~TERMP_SKIPCHAR;
561: return;
562: }
563:
1.188 kristaps 564: /* LINTED */
565: len = sz;
1.125 kristaps 566:
567: /*
568: * Encode and buffer a string of characters. If the current
569: * font mode is unset, buffer directly, else encode then buffer
570: * character by character.
571: */
572:
1.147 kristaps 573: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.188 kristaps 574: if (p->col + len >= p->maxcols)
575: adjbuf(p, p->col + len);
576: for (i = 0; i < len; i++)
577: p->buf[p->col++] = word[i];
1.125 kristaps 578: return;
579: }
580:
1.165 kristaps 581: /* Pre-buffer, assuming worst-case. */
582:
1.188 kristaps 583: if (p->col + 1 + (len * 3) >= p->maxcols)
584: adjbuf(p, p->col + 1 + (len * 3));
1.165 kristaps 585:
1.188 kristaps 586: for (i = 0; i < len; i++) {
1.199 schwarze 587: if (ASCII_HYPH != word[i] &&
588: ! isgraph((unsigned char)word[i])) {
1.188 kristaps 589: p->buf[p->col++] = word[i];
1.125 kristaps 590: continue;
1.79 kristaps 591: }
1.125 kristaps 592:
593: if (TERMFONT_UNDER == f)
1.188 kristaps 594: p->buf[p->col++] = '_';
1.199 schwarze 595: else if (ASCII_HYPH == word[i])
596: p->buf[p->col++] = '-';
1.125 kristaps 597: else
1.188 kristaps 598: p->buf[p->col++] = word[i];
1.125 kristaps 599:
1.188 kristaps 600: p->buf[p->col++] = 8;
601: p->buf[p->col++] = word[i];
1.79 kristaps 602: }
603: }
1.106 kristaps 604:
1.107 kristaps 605: size_t
1.149 kristaps 606: term_len(const struct termp *p, size_t sz)
607: {
608:
609: return((*p->width)(p, ' ') * sz);
610: }
611:
1.203 schwarze 612: static size_t
613: cond_width(const struct termp *p, int c, int *skip)
614: {
615:
616: if (*skip) {
617: (*skip) = 0;
618: return(0);
619: } else
620: return((*p->width)(p, c));
621: }
1.149 kristaps 622:
623: size_t
624: term_strlen(const struct termp *p, const char *cp)
625: {
1.184 kristaps 626: size_t sz, rsz, i;
1.203 schwarze 627: int ssz, skip, c;
1.171 kristaps 628: const char *seq, *rhs;
1.196 kristaps 629: enum mandoc_esc esc;
1.189 kristaps 630: static const char rej[] = { '\\', ASCII_HYPH, ASCII_NBRSP, '\0' };
1.171 kristaps 631:
1.184 kristaps 632: /*
633: * Account for escaped sequences within string length
634: * calculations. This follows the logic in term_word() as we
635: * must calculate the width of produced strings.
636: */
637:
638: sz = 0;
1.203 schwarze 639: skip = 0;
1.189 kristaps 640: while ('\0' != *cp) {
641: rsz = strcspn(cp, rej);
642: for (i = 0; i < rsz; i++)
1.203 schwarze 643: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 644:
1.192 kristaps 645: c = 0;
1.184 kristaps 646: switch (*cp) {
647: case ('\\'):
1.189 kristaps 648: cp++;
1.196 kristaps 649: esc = mandoc_escape(&cp, &seq, &ssz);
650: if (ESCAPE_ERROR == esc)
1.184 kristaps 651: return(sz);
1.196 kristaps 652:
653: if (TERMENC_ASCII != p->enc)
654: switch (esc) {
655: case (ESCAPE_UNICODE):
656: c = mchars_num2uc
657: (seq + 1, ssz - 1);
658: if ('\0' == c)
659: break;
1.203 schwarze 660: sz += cond_width(p, c, &skip);
1.196 kristaps 661: continue;
662: case (ESCAPE_SPECIAL):
663: c = mchars_spec2cp
664: (p->symtab, seq, ssz);
665: if (c <= 0)
666: break;
1.203 schwarze 667: sz += cond_width(p, c, &skip);
1.196 kristaps 668: continue;
669: default:
1.194 kristaps 670: break;
671: }
1.196 kristaps 672:
673: rhs = NULL;
674:
675: switch (esc) {
676: case (ESCAPE_UNICODE):
1.203 schwarze 677: sz += cond_width(p, '?', &skip);
1.194 kristaps 678: break;
1.190 kristaps 679: case (ESCAPE_NUMBERED):
1.194 kristaps 680: c = mchars_num2char(seq, ssz);
1.190 kristaps 681: if ('\0' != c)
1.203 schwarze 682: sz += cond_width(p, c, &skip);
1.171 kristaps 683: break;
1.184 kristaps 684: case (ESCAPE_SPECIAL):
1.185 kristaps 685: rhs = mchars_spec2str
1.171 kristaps 686: (p->symtab, seq, ssz, &rsz);
687:
1.184 kristaps 688: if (ssz != 1 || rhs)
1.171 kristaps 689: break;
690:
691: rhs = seq;
692: rsz = ssz;
693: break;
1.203 schwarze 694: case (ESCAPE_SKIPCHAR):
695: skip = 1;
696: break;
1.171 kristaps 697: default:
698: break;
699: }
1.149 kristaps 700:
1.184 kristaps 701: if (NULL == rhs)
702: break;
703:
1.203 schwarze 704: if (skip) {
705: skip = 0;
706: break;
707: }
708:
1.184 kristaps 709: for (i = 0; i < rsz; i++)
710: sz += (*p->width)(p, *rhs++);
711: break;
712: case (ASCII_NBRSP):
1.203 schwarze 713: sz += cond_width(p, ' ', &skip);
1.176 kristaps 714: cp++;
1.184 kristaps 715: break;
716: case (ASCII_HYPH):
1.203 schwarze 717: sz += cond_width(p, '-', &skip);
1.176 kristaps 718: cp++;
1.184 kristaps 719: break;
720: default:
721: break;
722: }
1.189 kristaps 723: }
1.149 kristaps 724:
725: return(sz);
726: }
727:
1.157 kristaps 728: /* ARGSUSED */
1.149 kristaps 729: size_t
730: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 731: {
732: double r;
733:
1.107 kristaps 734: switch (su->unit) {
1.106 kristaps 735: case (SCALE_CM):
1.107 kristaps 736: r = su->scale * 2;
1.106 kristaps 737: break;
738: case (SCALE_IN):
1.107 kristaps 739: r = su->scale * 6;
1.106 kristaps 740: break;
741: case (SCALE_PC):
1.107 kristaps 742: r = su->scale;
1.106 kristaps 743: break;
744: case (SCALE_PT):
1.107 kristaps 745: r = su->scale / 8;
1.106 kristaps 746: break;
747: case (SCALE_MM):
1.107 kristaps 748: r = su->scale / 1000;
1.106 kristaps 749: break;
750: case (SCALE_VS):
1.107 kristaps 751: r = su->scale;
1.106 kristaps 752: break;
753: default:
1.107 kristaps 754: r = su->scale - 1;
1.106 kristaps 755: break;
756: }
757:
758: if (r < 0.0)
759: r = 0.0;
1.107 kristaps 760: return(/* LINTED */(size_t)
1.106 kristaps 761: r);
762: }
763:
1.107 kristaps 764: size_t
1.149 kristaps 765: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 766: {
1.156 kristaps 767: double v;
1.108 kristaps 768:
1.156 kristaps 769: v = ((*p->hspan)(p, su));
770: if (v < 0.0)
771: v = 0.0;
772: return((size_t) /* LINTED */
773: v);
1.106 kristaps 774: }
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