Annotation of mandoc/term.c, Revision 1.203
1.203 ! schwarze 1: /* $Id: term.c,v 1.202 2012/05/27 18:02:49 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: /*
268: * Behave exactly the same way as groff:
1.92 kristaps 269: * If we have overstepped the margin, temporarily move
270: * it to the right and flag the rest of the line to be
271: * shorter.
1.91 kristaps 272: * If we landed right at the margin, be happy.
1.92 kristaps 273: * If we are one step before the margin, temporarily
274: * move it one step LEFT and flag the rest of the line
275: * to be longer.
1.91 kristaps 276: */
1.200 schwarze 277: if (p->overstep < -1)
1.129 kristaps 278: p->overstep = 0;
1.200 schwarze 279: return;
1.91 kristaps 280:
281: } else if (TERMP_DANGLE & p->flags)
282: return;
1.15 kristaps 283:
1.200 schwarze 284: /* If the column was overrun, break the line. */
285: if (maxvis <= vis +
1.174 schwarze 286: ((TERMP_TWOSPACE & p->flags) ? (*p->width)(p, ' ') : 0)) {
1.146 kristaps 287: (*p->endline)(p);
1.200 schwarze 288: p->viscol = 0;
1.91 kristaps 289: }
1.15 kristaps 290: }
291:
292:
1.71 kristaps 293: /*
294: * A newline only breaks an existing line; it won't assert vertical
295: * space. All data in the output buffer is flushed prior to the newline
296: * assertion.
297: */
298: void
299: term_newln(struct termp *p)
1.15 kristaps 300: {
301:
1.71 kristaps 302: p->flags |= TERMP_NOSPACE;
1.200 schwarze 303: if (p->col || p->viscol)
304: term_flushln(p);
1.16 kristaps 305: }
306:
307:
1.71 kristaps 308: /*
309: * Asserts a vertical space (a full, empty line-break between lines).
310: * Note that if used twice, this will cause two blank spaces and so on.
311: * All data in the output buffer is flushed prior to the newline
312: * assertion.
313: */
314: void
315: term_vspace(struct termp *p)
1.16 kristaps 316: {
317:
1.62 kristaps 318: term_newln(p);
1.139 schwarze 319: p->viscol = 0;
1.202 schwarze 320: if (0 < p->skipvsp)
321: p->skipvsp--;
322: else
323: (*p->endline)(p);
1.16 kristaps 324: }
325:
1.125 kristaps 326: void
327: term_fontlast(struct termp *p)
328: {
329: enum termfont f;
330:
331: f = p->fontl;
332: p->fontl = p->fontq[p->fonti];
333: p->fontq[p->fonti] = f;
334: }
335:
336:
337: void
338: term_fontrepl(struct termp *p, enum termfont f)
339: {
340:
341: p->fontl = p->fontq[p->fonti];
342: p->fontq[p->fonti] = f;
343: }
344:
345:
346: void
347: term_fontpush(struct termp *p, enum termfont f)
348: {
349:
350: assert(p->fonti + 1 < 10);
351: p->fontl = p->fontq[p->fonti];
352: p->fontq[++p->fonti] = f;
353: }
354:
355:
356: const void *
357: term_fontq(struct termp *p)
358: {
359:
360: return(&p->fontq[p->fonti]);
361: }
362:
363:
364: enum termfont
365: term_fonttop(struct termp *p)
366: {
367:
368: return(p->fontq[p->fonti]);
369: }
370:
371:
372: void
373: term_fontpopq(struct termp *p, const void *key)
374: {
375:
376: while (p->fonti >= 0 && key != &p->fontq[p->fonti])
377: p->fonti--;
378: assert(p->fonti >= 0);
379: }
1.94 kristaps 380:
1.125 kristaps 381:
382: void
383: term_fontpop(struct termp *p)
384: {
385:
386: assert(p->fonti);
387: p->fonti--;
1.17 kristaps 388: }
389:
1.71 kristaps 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: */
1.86 kristaps 395: void
396: term_word(struct termp *p, const char *word)
1.65 kristaps 397: {
1.191 kristaps 398: const char *seq, *cp;
399: char c;
1.194 kristaps 400: int sz, uc;
1.124 kristaps 401: size_t ssz;
1.184 kristaps 402: enum mandoc_esc esc;
1.100 kristaps 403:
1.133 kristaps 404: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 405: if ( ! (TERMP_KEEP & p->flags)) {
406: if (TERMP_PREKEEP & p->flags)
407: p->flags |= TERMP_KEEP;
1.133 kristaps 408: bufferc(p, ' ');
1.151 schwarze 409: if (TERMP_SENTENCE & p->flags)
410: bufferc(p, ' ');
411: } else
412: bufferc(p, ASCII_NBRSP);
1.133 kristaps 413: }
1.65 kristaps 414:
1.71 kristaps 415: if ( ! (p->flags & TERMP_NONOSPACE))
416: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 417: else
418: p->flags |= TERMP_NOSPACE;
1.133 kristaps 419:
1.173 schwarze 420: p->flags &= ~(TERMP_SENTENCE | TERMP_IGNDELIM);
1.65 kristaps 421:
1.184 kristaps 422: while ('\0' != *word) {
1.203 ! schwarze 423: if ('\\' != *word) {
! 424: if (TERMP_SKIPCHAR & p->flags) {
! 425: p->flags &= ~TERMP_SKIPCHAR;
! 426: word++;
! 427: continue;
! 428: }
! 429: ssz = strcspn(word, "\\");
1.162 kristaps 430: encode(p, word, ssz);
1.203 ! schwarze 431: word += (int)ssz;
1.124 kristaps 432: continue;
1.203 ! schwarze 433: }
1.124 kristaps 434:
1.184 kristaps 435: word++;
436: esc = mandoc_escape(&word, &seq, &sz);
437: if (ESCAPE_ERROR == esc)
438: break;
1.124 kristaps 439:
1.196 kristaps 440: if (TERMENC_ASCII != p->enc)
441: switch (esc) {
442: case (ESCAPE_UNICODE):
443: uc = mchars_num2uc(seq + 1, sz - 1);
444: if ('\0' == uc)
445: break;
446: encode1(p, uc);
447: continue;
448: case (ESCAPE_SPECIAL):
449: uc = mchars_spec2cp(p->symtab, seq, sz);
450: if (uc <= 0)
451: break;
452: encode1(p, uc);
453: continue;
454: default:
455: break;
456: }
457:
1.184 kristaps 458: switch (esc) {
1.192 kristaps 459: case (ESCAPE_UNICODE):
1.196 kristaps 460: encode1(p, '?');
1.192 kristaps 461: break;
1.184 kristaps 462: case (ESCAPE_NUMBERED):
1.196 kristaps 463: c = mchars_num2char(seq, sz);
464: if ('\0' != c)
1.191 kristaps 465: encode(p, &c, 1);
1.184 kristaps 466: break;
467: case (ESCAPE_SPECIAL):
1.191 kristaps 468: cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
469: if (NULL != cp)
470: encode(p, cp, ssz);
471: else if (1 == ssz)
472: encode(p, seq, sz);
1.124 kristaps 473: break;
1.184 kristaps 474: case (ESCAPE_FONTBOLD):
1.125 kristaps 475: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 476: break;
1.184 kristaps 477: case (ESCAPE_FONTITALIC):
1.125 kristaps 478: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 479: break;
1.195 kristaps 480: case (ESCAPE_FONT):
481: /* FALLTHROUGH */
1.184 kristaps 482: case (ESCAPE_FONTROMAN):
1.125 kristaps 483: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 484: break;
1.184 kristaps 485: case (ESCAPE_FONTPREV):
1.125 kristaps 486: term_fontlast(p);
1.124 kristaps 487: break;
1.184 kristaps 488: case (ESCAPE_NOSPACE):
1.203 ! schwarze 489: if (TERMP_SKIPCHAR & p->flags)
! 490: p->flags &= ~TERMP_SKIPCHAR;
! 491: else if ('\0' == *word)
1.184 kristaps 492: p->flags |= TERMP_NOSPACE;
493: break;
1.203 ! schwarze 494: case (ESCAPE_SKIPCHAR):
! 495: p->flags |= TERMP_SKIPCHAR;
! 496: break;
1.124 kristaps 497: default:
498: break;
499: }
500: }
1.65 kristaps 501: }
502:
1.71 kristaps 503: static void
1.188 kristaps 504: adjbuf(struct termp *p, int sz)
1.51 kristaps 505: {
506:
1.125 kristaps 507: if (0 == p->maxcols)
508: p->maxcols = 1024;
509: while (sz >= p->maxcols)
510: p->maxcols <<= 2;
511:
1.188 kristaps 512: p->buf = mandoc_realloc
513: (p->buf, sizeof(int) * (size_t)p->maxcols);
1.51 kristaps 514: }
515:
1.79 kristaps 516: static void
1.125 kristaps 517: bufferc(struct termp *p, char c)
518: {
519:
520: if (p->col + 1 >= p->maxcols)
521: adjbuf(p, p->col + 1);
522:
1.188 kristaps 523: p->buf[p->col++] = c;
1.125 kristaps 524: }
525:
1.194 kristaps 526: /*
527: * See encode().
528: * Do this for a single (probably unicode) value.
529: * Does not check for non-decorated glyphs.
530: */
531: static void
532: encode1(struct termp *p, int c)
533: {
534: enum termfont f;
535:
1.203 ! schwarze 536: if (TERMP_SKIPCHAR & p->flags) {
! 537: p->flags &= ~TERMP_SKIPCHAR;
! 538: return;
! 539: }
! 540:
1.194 kristaps 541: if (p->col + 4 >= p->maxcols)
542: adjbuf(p, p->col + 4);
543:
544: f = term_fonttop(p);
545:
546: if (TERMFONT_NONE == f) {
547: p->buf[p->col++] = c;
548: return;
549: } else if (TERMFONT_UNDER == f) {
550: p->buf[p->col++] = '_';
551: } else
552: p->buf[p->col++] = c;
553:
554: p->buf[p->col++] = 8;
555: p->buf[p->col++] = c;
556: }
557:
1.125 kristaps 558: static void
559: encode(struct termp *p, const char *word, size_t sz)
560: {
561: enum termfont f;
1.188 kristaps 562: int i, len;
563:
1.203 ! schwarze 564: if (TERMP_SKIPCHAR & p->flags) {
! 565: p->flags &= ~TERMP_SKIPCHAR;
! 566: return;
! 567: }
! 568:
1.188 kristaps 569: /* LINTED */
570: len = sz;
1.125 kristaps 571:
572: /*
573: * Encode and buffer a string of characters. If the current
574: * font mode is unset, buffer directly, else encode then buffer
575: * character by character.
576: */
577:
1.147 kristaps 578: if (TERMFONT_NONE == (f = term_fonttop(p))) {
1.188 kristaps 579: if (p->col + len >= p->maxcols)
580: adjbuf(p, p->col + len);
581: for (i = 0; i < len; i++)
582: p->buf[p->col++] = word[i];
1.125 kristaps 583: return;
584: }
585:
1.165 kristaps 586: /* Pre-buffer, assuming worst-case. */
587:
1.188 kristaps 588: if (p->col + 1 + (len * 3) >= p->maxcols)
589: adjbuf(p, p->col + 1 + (len * 3));
1.165 kristaps 590:
1.188 kristaps 591: for (i = 0; i < len; i++) {
1.199 schwarze 592: if (ASCII_HYPH != word[i] &&
593: ! isgraph((unsigned char)word[i])) {
1.188 kristaps 594: p->buf[p->col++] = word[i];
1.125 kristaps 595: continue;
1.79 kristaps 596: }
1.125 kristaps 597:
598: if (TERMFONT_UNDER == f)
1.188 kristaps 599: p->buf[p->col++] = '_';
1.199 schwarze 600: else if (ASCII_HYPH == word[i])
601: p->buf[p->col++] = '-';
1.125 kristaps 602: else
1.188 kristaps 603: p->buf[p->col++] = word[i];
1.125 kristaps 604:
1.188 kristaps 605: p->buf[p->col++] = 8;
606: p->buf[p->col++] = word[i];
1.79 kristaps 607: }
608: }
1.106 kristaps 609:
1.107 kristaps 610: size_t
1.149 kristaps 611: term_len(const struct termp *p, size_t sz)
612: {
613:
614: return((*p->width)(p, ' ') * sz);
615: }
616:
1.203 ! schwarze 617: static size_t
! 618: cond_width(const struct termp *p, int c, int *skip)
! 619: {
! 620:
! 621: if (*skip) {
! 622: (*skip) = 0;
! 623: return(0);
! 624: } else
! 625: return((*p->width)(p, c));
! 626: }
1.149 kristaps 627:
628: size_t
629: term_strlen(const struct termp *p, const char *cp)
630: {
1.184 kristaps 631: size_t sz, rsz, i;
1.203 ! schwarze 632: int ssz, skip, c;
1.171 kristaps 633: const char *seq, *rhs;
1.196 kristaps 634: enum mandoc_esc esc;
1.189 kristaps 635: static const char rej[] = { '\\', ASCII_HYPH, ASCII_NBRSP, '\0' };
1.171 kristaps 636:
1.184 kristaps 637: /*
638: * Account for escaped sequences within string length
639: * calculations. This follows the logic in term_word() as we
640: * must calculate the width of produced strings.
641: */
642:
643: sz = 0;
1.203 ! schwarze 644: skip = 0;
1.189 kristaps 645: while ('\0' != *cp) {
646: rsz = strcspn(cp, rej);
647: for (i = 0; i < rsz; i++)
1.203 ! schwarze 648: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 649:
1.192 kristaps 650: c = 0;
1.184 kristaps 651: switch (*cp) {
652: case ('\\'):
1.189 kristaps 653: cp++;
1.196 kristaps 654: esc = mandoc_escape(&cp, &seq, &ssz);
655: if (ESCAPE_ERROR == esc)
1.184 kristaps 656: return(sz);
1.196 kristaps 657:
658: if (TERMENC_ASCII != p->enc)
659: switch (esc) {
660: case (ESCAPE_UNICODE):
661: c = mchars_num2uc
662: (seq + 1, ssz - 1);
663: if ('\0' == c)
664: break;
1.203 ! schwarze 665: sz += cond_width(p, c, &skip);
1.196 kristaps 666: continue;
667: case (ESCAPE_SPECIAL):
668: c = mchars_spec2cp
669: (p->symtab, seq, ssz);
670: if (c <= 0)
671: break;
1.203 ! schwarze 672: sz += cond_width(p, c, &skip);
1.196 kristaps 673: continue;
674: default:
1.194 kristaps 675: break;
676: }
1.196 kristaps 677:
678: rhs = NULL;
679:
680: switch (esc) {
681: case (ESCAPE_UNICODE):
1.203 ! schwarze 682: sz += cond_width(p, '?', &skip);
1.194 kristaps 683: break;
1.190 kristaps 684: case (ESCAPE_NUMBERED):
1.194 kristaps 685: c = mchars_num2char(seq, ssz);
1.190 kristaps 686: if ('\0' != c)
1.203 ! schwarze 687: sz += cond_width(p, c, &skip);
1.171 kristaps 688: break;
1.184 kristaps 689: case (ESCAPE_SPECIAL):
1.185 kristaps 690: rhs = mchars_spec2str
1.171 kristaps 691: (p->symtab, seq, ssz, &rsz);
692:
1.184 kristaps 693: if (ssz != 1 || rhs)
1.171 kristaps 694: break;
695:
696: rhs = seq;
697: rsz = ssz;
698: break;
1.203 ! schwarze 699: case (ESCAPE_SKIPCHAR):
! 700: skip = 1;
! 701: break;
1.171 kristaps 702: default:
703: break;
704: }
1.149 kristaps 705:
1.184 kristaps 706: if (NULL == rhs)
707: break;
708:
1.203 ! schwarze 709: if (skip) {
! 710: skip = 0;
! 711: break;
! 712: }
! 713:
1.184 kristaps 714: for (i = 0; i < rsz; i++)
715: sz += (*p->width)(p, *rhs++);
716: break;
717: case (ASCII_NBRSP):
1.203 ! schwarze 718: sz += cond_width(p, ' ', &skip);
1.176 kristaps 719: cp++;
1.184 kristaps 720: break;
721: case (ASCII_HYPH):
1.203 ! schwarze 722: sz += cond_width(p, '-', &skip);
1.176 kristaps 723: cp++;
1.184 kristaps 724: break;
725: default:
726: break;
727: }
1.189 kristaps 728: }
1.149 kristaps 729:
730: return(sz);
731: }
732:
1.157 kristaps 733: /* ARGSUSED */
1.149 kristaps 734: size_t
735: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 736: {
737: double r;
738:
1.107 kristaps 739: switch (su->unit) {
1.106 kristaps 740: case (SCALE_CM):
1.107 kristaps 741: r = su->scale * 2;
1.106 kristaps 742: break;
743: case (SCALE_IN):
1.107 kristaps 744: r = su->scale * 6;
1.106 kristaps 745: break;
746: case (SCALE_PC):
1.107 kristaps 747: r = su->scale;
1.106 kristaps 748: break;
749: case (SCALE_PT):
1.107 kristaps 750: r = su->scale / 8;
1.106 kristaps 751: break;
752: case (SCALE_MM):
1.107 kristaps 753: r = su->scale / 1000;
1.106 kristaps 754: break;
755: case (SCALE_VS):
1.107 kristaps 756: r = su->scale;
1.106 kristaps 757: break;
758: default:
1.107 kristaps 759: r = su->scale - 1;
1.106 kristaps 760: break;
761: }
762:
763: if (r < 0.0)
764: r = 0.0;
1.107 kristaps 765: return(/* LINTED */(size_t)
1.106 kristaps 766: r);
767: }
768:
1.107 kristaps 769: size_t
1.149 kristaps 770: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 771: {
1.156 kristaps 772: double v;
1.108 kristaps 773:
1.156 kristaps 774: v = ((*p->hspan)(p, su));
775: if (v < 0.0)
776: v = 0.0;
777: return((size_t) /* LINTED */
778: v);
1.106 kristaps 779: }
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