Annotation of mandoc/term.c, Revision 1.216
1.216 ! schwarze 1: /* $Id: term.c,v 1.215 2013/12/31 18:07:42 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: #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 *);
1.210 schwarze 37: static void adjbuf(struct termp *p, size_t);
1.191 kristaps 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.
1.211 schwarze 86: * p->trailspace may be set to 0, 1, or 2, depending on how many
87: * space characters are required at the end of the column.
1.91 kristaps 88: *
1.84 kristaps 89: * - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
90: * the line is overrun, and don't pad-right if it's underrun.
91: *
92: * - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
1.200 schwarze 93: * overrunning, instead save the position and continue at that point
1.84 kristaps 94: * when the next invocation.
1.71 kristaps 95: *
96: * In-line line breaking:
97: *
98: * If TERMP_NOBREAK is specified and the line overruns the right
99: * margin, it will break and pad-right to the right margin after
100: * writing. If maxrmargin is violated, it will break and continue
1.114 kristaps 101: * writing from the right-margin, which will lead to the above scenario
102: * upon exit. Otherwise, the line will break at the right margin.
1.71 kristaps 103: */
104: void
105: term_flushln(struct termp *p)
1.53 kristaps 106: {
1.210 schwarze 107: size_t i; /* current input position in p->buf */
1.205 schwarze 108: int ntab; /* number of tabs to prepend */
1.114 kristaps 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 */
1.210 schwarze 114: size_t j; /* temporary loop index for p->buf */
115: size_t jhy; /* last hyph before overflow w/r/t j */
1.152 kristaps 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
1.212 schwarze 123: * small set of values.
124: *
125: * The following unsigned-signed subtractions look strange,
126: * but they are actually correct. If the int p->overstep
127: * is negative, it gets sign extended. Subtracting that
128: * very large size_t effectively adds a small number to dv.
1.71 kristaps 129: */
1.175 kristaps 130: assert (p->rmargin >= p->offset);
1.174 schwarze 131: dv = p->rmargin - p->offset;
132: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
133: dv = p->maxrmargin - p->offset;
134: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 135:
1.71 kristaps 136: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 137:
1.136 schwarze 138: /*
1.200 schwarze 139: * Calculate the required amount of padding.
1.136 schwarze 140: */
1.200 schwarze 141: vbl = p->offset + p->overstep > p->viscol ?
142: p->offset + p->overstep - p->viscol : 0;
1.136 schwarze 143:
1.174 schwarze 144: vis = vend = 0;
145: i = 0;
1.115 kristaps 146:
1.188 kristaps 147: while (i < p->col) {
1.71 kristaps 148: /*
1.154 kristaps 149: * Handle literal tab characters: collapse all
150: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 151: */
1.205 schwarze 152: ntab = 0;
1.188 kristaps 153: while (i < p->col && '\t' == p->buf[i]) {
1.154 kristaps 154: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 155: vbl += vend - vis;
156: vis = vend;
1.205 schwarze 157: ntab++;
1.169 schwarze 158: i++;
1.138 schwarze 159: }
160:
161: /*
1.71 kristaps 162: * Count up visible word characters. Control sequences
163: * (starting with the CSI) aren't counted. A space
164: * generates a non-printing word, which is valid (the
165: * space is printed according to regular spacing rules).
166: */
167:
1.188 kristaps 168: for (j = i, jhy = 0; j < p->col; j++) {
1.208 schwarze 169: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.71 kristaps 170: break;
1.154 kristaps 171:
172: /* Back over the the last printed character. */
173: if (8 == p->buf[j]) {
1.153 kristaps 174: assert(j);
175: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 176: continue;
1.153 kristaps 177: }
1.154 kristaps 178:
179: /* Regular word. */
180: /* Break at the hyphen point if we overrun. */
181: if (vend > vis && vend < bp &&
1.216 ! schwarze 182: (ASCII_HYPH == p->buf[j] ||
! 183: ASCII_BREAK == p->buf[j]))
1.154 kristaps 184: jhy = j;
185:
186: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 187: }
1.53 kristaps 188:
1.71 kristaps 189: /*
1.81 kristaps 190: * Find out whether we would exceed the right margin.
1.136 schwarze 191: * If so, break to the next line.
1.81 kristaps 192: */
1.140 kristaps 193: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 194: vend -= vis;
1.146 kristaps 195: (*p->endline)(p);
1.201 schwarze 196: p->viscol = 0;
1.81 kristaps 197: if (TERMP_NOBREAK & p->flags) {
1.201 schwarze 198: vbl = p->rmargin;
1.136 schwarze 199: vend += p->rmargin - p->offset;
1.201 schwarze 200: } else
1.136 schwarze 201: vbl = p->offset;
1.205 schwarze 202:
203: /* use pending tabs on the new line */
204:
205: if (0 < ntab)
206: vbl += ntab * p->tabwidth;
1.130 kristaps 207:
1.212 schwarze 208: /*
209: * Remove the p->overstep width.
210: * Again, if p->overstep is negative,
211: * sign extension does the right thing.
212: */
1.130 kristaps 213:
1.174 schwarze 214: bp += (size_t)p->overstep;
1.129 kristaps 215: p->overstep = 0;
1.71 kristaps 216: }
1.138 schwarze 217:
1.130 kristaps 218: /* Write out the [remaining] word. */
1.188 kristaps 219: for ( ; i < p->col; i++) {
1.140 kristaps 220: if (vend > bp && jhy > 0 && i > jhy)
221: break;
1.138 schwarze 222: if ('\t' == p->buf[i])
223: break;
1.136 schwarze 224: if (' ' == p->buf[i]) {
1.164 kristaps 225: j = i;
226: while (' ' == p->buf[i])
1.136 schwarze 227: i++;
1.210 schwarze 228: dv = (i - j) * (*p->width)(p, ' ');
1.172 schwarze 229: vbl += dv;
230: vend += dv;
1.71 kristaps 231: break;
1.136 schwarze 232: }
233: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 234: vbl += (*p->width)(p, ' ');
1.136 schwarze 235: continue;
236: }
1.216 ! schwarze 237: if (ASCII_BREAK == p->buf[i])
! 238: continue;
1.130 kristaps 239:
1.136 schwarze 240: /*
241: * Now we definitely know there will be
242: * printable characters to output,
243: * so write preceding white space now.
244: */
245: if (vbl) {
1.146 kristaps 246: (*p->advance)(p, vbl);
1.139 schwarze 247: p->viscol += vbl;
1.136 schwarze 248: vbl = 0;
249: }
1.140 kristaps 250:
1.153 kristaps 251: if (ASCII_HYPH == p->buf[i]) {
1.146 kristaps 252: (*p->letter)(p, '-');
1.153 kristaps 253: p->viscol += (*p->width)(p, '-');
1.200 schwarze 254: continue;
255: }
256:
257: (*p->letter)(p, p->buf[i]);
258: if (8 == p->buf[i])
259: p->viscol -= (*p->width)(p, p->buf[i-1]);
260: else
1.153 kristaps 261: p->viscol += (*p->width)(p, p->buf[i]);
1.136 schwarze 262: }
263: vis = vend;
1.71 kristaps 264: }
1.168 schwarze 265:
266: /*
267: * If there was trailing white space, it was not printed;
268: * so reset the cursor position accordingly.
269: */
1.200 schwarze 270: if (vis)
271: vis -= vbl;
1.111 kristaps 272:
1.91 kristaps 273: p->col = 0;
1.129 kristaps 274: p->overstep = 0;
1.15 kristaps 275:
1.91 kristaps 276: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 277: p->viscol = 0;
1.146 kristaps 278: (*p->endline)(p);
1.15 kristaps 279: return;
1.71 kristaps 280: }
1.15 kristaps 281:
1.91 kristaps 282: if (TERMP_HANG & p->flags) {
1.211 schwarze 283: p->overstep = (int)(vis - maxvis +
284: p->trailspace * (*p->width)(p, ' '));
1.91 kristaps 285:
286: /*
1.92 kristaps 287: * If we have overstepped the margin, temporarily move
288: * it to the right and flag the rest of the line to be
289: * shorter.
1.212 schwarze 290: * If there is a request to keep the columns together,
291: * allow negative overstep when the column is not full.
1.91 kristaps 292: */
1.212 schwarze 293: if (p->trailspace && p->overstep < 0)
1.129 kristaps 294: p->overstep = 0;
1.200 schwarze 295: return;
1.91 kristaps 296:
297: } else if (TERMP_DANGLE & p->flags)
298: return;
1.15 kristaps 299:
1.200 schwarze 300: /* If the column was overrun, break the line. */
1.211 schwarze 301: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.146 kristaps 302: (*p->endline)(p);
1.200 schwarze 303: p->viscol = 0;
1.91 kristaps 304: }
1.15 kristaps 305: }
306:
307:
1.71 kristaps 308: /*
309: * A newline only breaks an existing line; it won't assert vertical
310: * space. All data in the output buffer is flushed prior to the newline
311: * assertion.
312: */
313: void
314: term_newln(struct termp *p)
1.15 kristaps 315: {
316:
1.71 kristaps 317: p->flags |= TERMP_NOSPACE;
1.200 schwarze 318: if (p->col || p->viscol)
319: term_flushln(p);
1.16 kristaps 320: }
321:
322:
1.71 kristaps 323: /*
324: * Asserts a vertical space (a full, empty line-break between lines).
325: * Note that if used twice, this will cause two blank spaces and so on.
326: * All data in the output buffer is flushed prior to the newline
327: * assertion.
328: */
329: void
330: term_vspace(struct termp *p)
1.16 kristaps 331: {
332:
1.62 kristaps 333: term_newln(p);
1.139 schwarze 334: p->viscol = 0;
1.202 schwarze 335: if (0 < p->skipvsp)
336: p->skipvsp--;
337: else
338: (*p->endline)(p);
1.16 kristaps 339: }
340:
1.125 kristaps 341: void
342: term_fontlast(struct termp *p)
343: {
344: enum termfont f;
345:
346: f = p->fontl;
347: p->fontl = p->fontq[p->fonti];
348: p->fontq[p->fonti] = f;
349: }
350:
351:
352: void
353: term_fontrepl(struct termp *p, enum termfont f)
354: {
355:
356: p->fontl = p->fontq[p->fonti];
357: p->fontq[p->fonti] = f;
358: }
359:
360:
361: void
362: term_fontpush(struct termp *p, enum termfont f)
363: {
364:
365: assert(p->fonti + 1 < 10);
366: p->fontl = p->fontq[p->fonti];
367: p->fontq[++p->fonti] = f;
368: }
369:
370:
371: const void *
372: term_fontq(struct termp *p)
373: {
374:
375: return(&p->fontq[p->fonti]);
376: }
377:
378:
379: enum termfont
380: term_fonttop(struct termp *p)
381: {
382:
383: return(p->fontq[p->fonti]);
384: }
385:
386:
387: void
388: term_fontpopq(struct termp *p, const void *key)
389: {
390:
1.206 schwarze 391: while (p->fonti >= 0 && key < (void *)(p->fontq + p->fonti))
1.125 kristaps 392: p->fonti--;
393: assert(p->fonti >= 0);
394: }
1.94 kristaps 395:
1.125 kristaps 396:
397: void
398: term_fontpop(struct termp *p)
399: {
400:
401: assert(p->fonti);
402: p->fonti--;
1.17 kristaps 403: }
404:
1.71 kristaps 405: /*
406: * Handle pwords, partial words, which may be either a single word or a
407: * phrase that cannot be broken down (such as a literal string). This
408: * handles word styling.
409: */
1.86 kristaps 410: void
411: term_word(struct termp *p, const char *word)
1.65 kristaps 412: {
1.214 schwarze 413: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 414: const char *seq, *cp;
415: char c;
1.194 kristaps 416: int sz, uc;
1.124 kristaps 417: size_t ssz;
1.184 kristaps 418: enum mandoc_esc esc;
1.100 kristaps 419:
1.133 kristaps 420: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 421: if ( ! (TERMP_KEEP & p->flags)) {
1.133 kristaps 422: bufferc(p, ' ');
1.151 schwarze 423: if (TERMP_SENTENCE & p->flags)
424: bufferc(p, ' ');
425: } else
426: bufferc(p, ASCII_NBRSP);
1.133 kristaps 427: }
1.207 schwarze 428: if (TERMP_PREKEEP & p->flags)
429: p->flags |= TERMP_KEEP;
1.65 kristaps 430:
1.71 kristaps 431: if ( ! (p->flags & TERMP_NONOSPACE))
432: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 433: else
434: p->flags |= TERMP_NOSPACE;
1.133 kristaps 435:
1.213 schwarze 436: p->flags &= ~TERMP_SENTENCE;
1.65 kristaps 437:
1.184 kristaps 438: while ('\0' != *word) {
1.203 schwarze 439: if ('\\' != *word) {
440: if (TERMP_SKIPCHAR & p->flags) {
441: p->flags &= ~TERMP_SKIPCHAR;
442: word++;
443: continue;
444: }
1.214 schwarze 445: if (TERMP_NBRWORD & p->flags) {
446: if (' ' == *word) {
447: encode(p, nbrsp, 1);
448: word++;
449: continue;
450: }
451: ssz = strcspn(word, "\\ ");
452: } else
453: ssz = strcspn(word, "\\");
1.162 kristaps 454: encode(p, word, ssz);
1.203 schwarze 455: word += (int)ssz;
1.124 kristaps 456: continue;
1.203 schwarze 457: }
1.124 kristaps 458:
1.184 kristaps 459: word++;
460: esc = mandoc_escape(&word, &seq, &sz);
461: if (ESCAPE_ERROR == esc)
462: break;
1.124 kristaps 463:
1.196 kristaps 464: if (TERMENC_ASCII != p->enc)
465: switch (esc) {
466: case (ESCAPE_UNICODE):
467: uc = mchars_num2uc(seq + 1, sz - 1);
468: if ('\0' == uc)
469: break;
470: encode1(p, uc);
471: continue;
472: case (ESCAPE_SPECIAL):
473: uc = mchars_spec2cp(p->symtab, seq, sz);
474: if (uc <= 0)
475: break;
476: encode1(p, uc);
477: continue;
478: default:
479: break;
480: }
481:
1.184 kristaps 482: switch (esc) {
1.192 kristaps 483: case (ESCAPE_UNICODE):
1.196 kristaps 484: encode1(p, '?');
1.192 kristaps 485: break;
1.184 kristaps 486: case (ESCAPE_NUMBERED):
1.196 kristaps 487: c = mchars_num2char(seq, sz);
488: if ('\0' != c)
1.191 kristaps 489: encode(p, &c, 1);
1.184 kristaps 490: break;
491: case (ESCAPE_SPECIAL):
1.191 kristaps 492: cp = mchars_spec2str(p->symtab, seq, sz, &ssz);
493: if (NULL != cp)
494: encode(p, cp, ssz);
495: else if (1 == ssz)
496: encode(p, seq, sz);
1.124 kristaps 497: break;
1.184 kristaps 498: case (ESCAPE_FONTBOLD):
1.125 kristaps 499: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 500: break;
1.184 kristaps 501: case (ESCAPE_FONTITALIC):
1.125 kristaps 502: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 503: break;
1.209 schwarze 504: case (ESCAPE_FONTBI):
505: term_fontrepl(p, TERMFONT_BI);
506: break;
1.195 kristaps 507: case (ESCAPE_FONT):
508: /* FALLTHROUGH */
1.184 kristaps 509: case (ESCAPE_FONTROMAN):
1.125 kristaps 510: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 511: break;
1.184 kristaps 512: case (ESCAPE_FONTPREV):
1.125 kristaps 513: term_fontlast(p);
1.124 kristaps 514: break;
1.184 kristaps 515: case (ESCAPE_NOSPACE):
1.203 schwarze 516: if (TERMP_SKIPCHAR & p->flags)
517: p->flags &= ~TERMP_SKIPCHAR;
518: else if ('\0' == *word)
1.184 kristaps 519: p->flags |= TERMP_NOSPACE;
520: break;
1.203 schwarze 521: case (ESCAPE_SKIPCHAR):
522: p->flags |= TERMP_SKIPCHAR;
523: break;
1.124 kristaps 524: default:
525: break;
526: }
527: }
1.214 schwarze 528: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 529: }
530:
1.71 kristaps 531: static void
1.210 schwarze 532: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 533: {
534:
1.125 kristaps 535: if (0 == p->maxcols)
536: p->maxcols = 1024;
537: while (sz >= p->maxcols)
538: p->maxcols <<= 2;
539:
1.210 schwarze 540: p->buf = mandoc_realloc(p->buf, sizeof(int) * p->maxcols);
1.51 kristaps 541: }
542:
1.79 kristaps 543: static void
1.125 kristaps 544: bufferc(struct termp *p, char c)
545: {
546:
547: if (p->col + 1 >= p->maxcols)
548: adjbuf(p, p->col + 1);
549:
1.188 kristaps 550: p->buf[p->col++] = c;
1.125 kristaps 551: }
552:
1.194 kristaps 553: /*
554: * See encode().
555: * Do this for a single (probably unicode) value.
556: * Does not check for non-decorated glyphs.
557: */
558: static void
559: encode1(struct termp *p, int c)
560: {
561: enum termfont f;
562:
1.203 schwarze 563: if (TERMP_SKIPCHAR & p->flags) {
564: p->flags &= ~TERMP_SKIPCHAR;
565: return;
566: }
567:
1.209 schwarze 568: if (p->col + 6 >= p->maxcols)
569: adjbuf(p, p->col + 6);
1.194 kristaps 570:
571: f = term_fonttop(p);
572:
1.209 schwarze 573: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.194 kristaps 574: p->buf[p->col++] = '_';
1.209 schwarze 575: p->buf[p->col++] = 8;
576: }
577: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
578: if (ASCII_HYPH == c)
579: p->buf[p->col++] = '-';
580: else
581: p->buf[p->col++] = c;
582: p->buf[p->col++] = 8;
583: }
1.194 kristaps 584: p->buf[p->col++] = c;
585: }
586:
1.125 kristaps 587: static void
588: encode(struct termp *p, const char *word, size_t sz)
589: {
1.210 schwarze 590: size_t i;
1.188 kristaps 591:
1.203 schwarze 592: if (TERMP_SKIPCHAR & p->flags) {
593: p->flags &= ~TERMP_SKIPCHAR;
594: return;
595: }
596:
1.125 kristaps 597: /*
598: * Encode and buffer a string of characters. If the current
599: * font mode is unset, buffer directly, else encode then buffer
600: * character by character.
601: */
602:
1.209 schwarze 603: if (TERMFONT_NONE == term_fonttop(p)) {
1.210 schwarze 604: if (p->col + sz >= p->maxcols)
605: adjbuf(p, p->col + sz);
606: for (i = 0; i < sz; i++)
1.188 kristaps 607: p->buf[p->col++] = word[i];
1.125 kristaps 608: return;
609: }
610:
1.165 kristaps 611: /* Pre-buffer, assuming worst-case. */
612:
1.210 schwarze 613: if (p->col + 1 + (sz * 5) >= p->maxcols)
614: adjbuf(p, p->col + 1 + (sz * 5));
1.165 kristaps 615:
1.210 schwarze 616: for (i = 0; i < sz; i++) {
1.209 schwarze 617: if (ASCII_HYPH == word[i] ||
618: isgraph((unsigned char)word[i]))
619: encode1(p, word[i]);
1.125 kristaps 620: else
1.188 kristaps 621: p->buf[p->col++] = word[i];
1.79 kristaps 622: }
623: }
1.106 kristaps 624:
1.107 kristaps 625: size_t
1.149 kristaps 626: term_len(const struct termp *p, size_t sz)
627: {
628:
629: return((*p->width)(p, ' ') * sz);
630: }
631:
1.203 schwarze 632: static size_t
633: cond_width(const struct termp *p, int c, int *skip)
634: {
635:
636: if (*skip) {
637: (*skip) = 0;
638: return(0);
639: } else
640: return((*p->width)(p, c));
641: }
1.149 kristaps 642:
643: size_t
644: term_strlen(const struct termp *p, const char *cp)
645: {
1.184 kristaps 646: size_t sz, rsz, i;
1.203 schwarze 647: int ssz, skip, c;
1.171 kristaps 648: const char *seq, *rhs;
1.196 kristaps 649: enum mandoc_esc esc;
1.216 ! schwarze 650: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
! 651: ASCII_BREAK, '\0' };
1.171 kristaps 652:
1.184 kristaps 653: /*
654: * Account for escaped sequences within string length
655: * calculations. This follows the logic in term_word() as we
656: * must calculate the width of produced strings.
657: */
658:
659: sz = 0;
1.203 schwarze 660: skip = 0;
1.189 kristaps 661: while ('\0' != *cp) {
662: rsz = strcspn(cp, rej);
663: for (i = 0; i < rsz; i++)
1.203 schwarze 664: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 665:
1.184 kristaps 666: switch (*cp) {
667: case ('\\'):
1.189 kristaps 668: cp++;
1.196 kristaps 669: esc = mandoc_escape(&cp, &seq, &ssz);
670: if (ESCAPE_ERROR == esc)
1.184 kristaps 671: return(sz);
1.196 kristaps 672:
673: if (TERMENC_ASCII != p->enc)
674: switch (esc) {
675: case (ESCAPE_UNICODE):
676: c = mchars_num2uc
677: (seq + 1, ssz - 1);
678: if ('\0' == c)
679: break;
1.203 schwarze 680: sz += cond_width(p, c, &skip);
1.196 kristaps 681: continue;
682: case (ESCAPE_SPECIAL):
683: c = mchars_spec2cp
684: (p->symtab, seq, ssz);
685: if (c <= 0)
686: break;
1.203 schwarze 687: sz += cond_width(p, c, &skip);
1.196 kristaps 688: continue;
689: default:
1.194 kristaps 690: break;
691: }
1.196 kristaps 692:
693: rhs = NULL;
694:
695: switch (esc) {
696: case (ESCAPE_UNICODE):
1.203 schwarze 697: sz += cond_width(p, '?', &skip);
1.194 kristaps 698: break;
1.190 kristaps 699: case (ESCAPE_NUMBERED):
1.194 kristaps 700: c = mchars_num2char(seq, ssz);
1.190 kristaps 701: if ('\0' != c)
1.203 schwarze 702: sz += cond_width(p, c, &skip);
1.171 kristaps 703: break;
1.184 kristaps 704: case (ESCAPE_SPECIAL):
1.185 kristaps 705: rhs = mchars_spec2str
1.171 kristaps 706: (p->symtab, seq, ssz, &rsz);
707:
1.184 kristaps 708: if (ssz != 1 || rhs)
1.171 kristaps 709: break;
710:
711: rhs = seq;
712: rsz = ssz;
713: break;
1.203 schwarze 714: case (ESCAPE_SKIPCHAR):
715: skip = 1;
716: break;
1.171 kristaps 717: default:
718: break;
719: }
1.149 kristaps 720:
1.184 kristaps 721: if (NULL == rhs)
722: break;
723:
1.203 schwarze 724: if (skip) {
725: skip = 0;
726: break;
727: }
728:
1.184 kristaps 729: for (i = 0; i < rsz; i++)
730: sz += (*p->width)(p, *rhs++);
731: break;
732: case (ASCII_NBRSP):
1.203 schwarze 733: sz += cond_width(p, ' ', &skip);
1.176 kristaps 734: cp++;
1.184 kristaps 735: break;
736: case (ASCII_HYPH):
1.203 schwarze 737: sz += cond_width(p, '-', &skip);
1.176 kristaps 738: cp++;
1.216 ! schwarze 739: /* FALLTHROUGH */
! 740: case (ASCII_BREAK):
1.184 kristaps 741: break;
742: default:
743: break;
744: }
1.189 kristaps 745: }
1.149 kristaps 746:
747: return(sz);
748: }
749:
1.157 kristaps 750: /* ARGSUSED */
1.149 kristaps 751: size_t
752: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 753: {
754: double r;
755:
1.107 kristaps 756: switch (su->unit) {
1.106 kristaps 757: case (SCALE_CM):
1.107 kristaps 758: r = su->scale * 2;
1.106 kristaps 759: break;
760: case (SCALE_IN):
1.107 kristaps 761: r = su->scale * 6;
1.106 kristaps 762: break;
763: case (SCALE_PC):
1.107 kristaps 764: r = su->scale;
1.106 kristaps 765: break;
766: case (SCALE_PT):
1.107 kristaps 767: r = su->scale / 8;
1.106 kristaps 768: break;
769: case (SCALE_MM):
1.107 kristaps 770: r = su->scale / 1000;
1.106 kristaps 771: break;
772: case (SCALE_VS):
1.107 kristaps 773: r = su->scale;
1.106 kristaps 774: break;
775: default:
1.107 kristaps 776: r = su->scale - 1;
1.106 kristaps 777: break;
778: }
779:
780: if (r < 0.0)
781: r = 0.0;
1.107 kristaps 782: return(/* LINTED */(size_t)
1.106 kristaps 783: r);
784: }
785:
1.107 kristaps 786: size_t
1.149 kristaps 787: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 788: {
1.156 kristaps 789: double v;
1.108 kristaps 790:
1.156 kristaps 791: v = ((*p->hspan)(p, su));
792: if (v < 0.0)
793: v = 0.0;
794: return((size_t) /* LINTED */
795: v);
1.106 kristaps 796: }
CVSweb
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to term.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [cvsweb.bsd.lv] / mandoc