Annotation of mandoc/term.c, Revision 1.230
1.230 ! schwarze 1: /* $Id: term.c,v 1.229 2014/10/26 17:12:03 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:
1.71 kristaps 45: if (p->buf)
46: free(p->buf);
1.102 kristaps 47: if (p->symtab)
1.185 kristaps 48: mchars_free(p->symtab);
1.145 kristaps 49:
1.142 kristaps 50: free(p);
51: }
52:
53: void
1.222 schwarze 54: term_begin(struct termp *p, term_margin head,
1.142 kristaps 55: term_margin foot, const void *arg)
56: {
57:
58: p->headf = head;
59: p->footf = foot;
60: p->argf = arg;
1.146 kristaps 61: (*p->begin)(p);
1.142 kristaps 62: }
63:
64: void
65: term_end(struct termp *p)
66: {
67:
1.146 kristaps 68: (*p->end)(p);
1.14 kristaps 69: }
70:
1.71 kristaps 71: /*
1.221 schwarze 72: * Flush a chunk of text. By default, break the output line each time
73: * the right margin is reached, and continue output on the next line
74: * at the same offset as the chunk itself. By default, also break the
75: * output line at the end of the chunk.
1.130 kristaps 76: * The following flags may be specified:
1.71 kristaps 77: *
1.221 schwarze 78: * - TERMP_NOBREAK: Do not break the output line at the right margin,
79: * but only at the max right margin. Also, do not break the output
80: * line at the end of the chunk, such that the next call can pad to
81: * the next column. However, if less than p->trailspace blanks,
82: * which can be 0, 1, or 2, remain to the right margin, the line
83: * will be broken.
84: * - TERMP_BRIND: If the chunk does not fit and the output line has
85: * to be broken, start the next line at the right margin instead
86: * of at the offset. Used together with TERMP_NOBREAK for the tags
87: * in various kinds of tagged lists.
88: * - TERMP_DANGLE: Do not break the output line at the right margin,
89: * append the next chunk after it even if this one is too long.
90: * To be used together with TERMP_NOBREAK.
91: * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
92: * the next chunk if this column is not full.
1.71 kristaps 93: */
94: void
95: term_flushln(struct termp *p)
1.53 kristaps 96: {
1.210 schwarze 97: size_t i; /* current input position in p->buf */
1.205 schwarze 98: int ntab; /* number of tabs to prepend */
1.114 kristaps 99: size_t vis; /* current visual position on output */
100: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 101: size_t vend; /* end of word visual position on output */
1.114 kristaps 102: size_t bp; /* visual right border position */
1.172 schwarze 103: size_t dv; /* temporary for visual pos calculations */
1.210 schwarze 104: size_t j; /* temporary loop index for p->buf */
105: size_t jhy; /* last hyph before overflow w/r/t j */
1.152 kristaps 106: size_t maxvis; /* output position of visible boundary */
107: size_t mmax; /* used in calculating bp */
1.53 kristaps 108:
1.71 kristaps 109: /*
110: * First, establish the maximum columns of "visible" content.
111: * This is usually the difference between the right-margin and
112: * an indentation, but can be, for tagged lists or columns, a
1.212 schwarze 113: * small set of values.
114: *
115: * The following unsigned-signed subtractions look strange,
116: * but they are actually correct. If the int p->overstep
117: * is negative, it gets sign extended. Subtracting that
118: * very large size_t effectively adds a small number to dv.
1.71 kristaps 119: */
1.175 kristaps 120: assert (p->rmargin >= p->offset);
1.174 schwarze 121: dv = p->rmargin - p->offset;
122: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
123: dv = p->maxrmargin - p->offset;
124: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 125:
1.71 kristaps 126: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 127:
1.136 schwarze 128: /*
1.200 schwarze 129: * Calculate the required amount of padding.
1.136 schwarze 130: */
1.200 schwarze 131: vbl = p->offset + p->overstep > p->viscol ?
132: p->offset + p->overstep - p->viscol : 0;
1.136 schwarze 133:
1.174 schwarze 134: vis = vend = 0;
135: i = 0;
1.115 kristaps 136:
1.188 kristaps 137: while (i < p->col) {
1.71 kristaps 138: /*
1.154 kristaps 139: * Handle literal tab characters: collapse all
140: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 141: */
1.205 schwarze 142: ntab = 0;
1.188 kristaps 143: while (i < p->col && '\t' == p->buf[i]) {
1.154 kristaps 144: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 145: vbl += vend - vis;
146: vis = vend;
1.205 schwarze 147: ntab++;
1.169 schwarze 148: i++;
1.138 schwarze 149: }
150:
151: /*
1.71 kristaps 152: * Count up visible word characters. Control sequences
153: * (starting with the CSI) aren't counted. A space
154: * generates a non-printing word, which is valid (the
155: * space is printed according to regular spacing rules).
156: */
157:
1.188 kristaps 158: for (j = i, jhy = 0; j < p->col; j++) {
1.208 schwarze 159: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.71 kristaps 160: break;
1.154 kristaps 161:
162: /* Back over the the last printed character. */
163: if (8 == p->buf[j]) {
1.153 kristaps 164: assert(j);
165: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 166: continue;
1.153 kristaps 167: }
1.154 kristaps 168:
169: /* Regular word. */
170: /* Break at the hyphen point if we overrun. */
1.222 schwarze 171: if (vend > vis && vend < bp &&
1.216 schwarze 172: (ASCII_HYPH == p->buf[j] ||
173: ASCII_BREAK == p->buf[j]))
1.154 kristaps 174: jhy = j;
175:
1.217 schwarze 176: /*
177: * Hyphenation now decided, put back a real
178: * hyphen such that we get the correct width.
179: */
180: if (ASCII_HYPH == p->buf[j])
181: p->buf[j] = '-';
182:
1.154 kristaps 183: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 184: }
1.53 kristaps 185:
1.71 kristaps 186: /*
1.81 kristaps 187: * Find out whether we would exceed the right margin.
1.136 schwarze 188: * If so, break to the next line.
1.81 kristaps 189: */
1.140 kristaps 190: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 191: vend -= vis;
1.146 kristaps 192: (*p->endline)(p);
1.201 schwarze 193: p->viscol = 0;
1.221 schwarze 194: if (TERMP_BRIND & p->flags) {
1.201 schwarze 195: vbl = p->rmargin;
1.136 schwarze 196: vend += p->rmargin - p->offset;
1.201 schwarze 197: } else
1.136 schwarze 198: vbl = p->offset;
1.205 schwarze 199:
200: /* use pending tabs on the new line */
201:
202: if (0 < ntab)
203: vbl += ntab * p->tabwidth;
1.130 kristaps 204:
1.212 schwarze 205: /*
206: * Remove the p->overstep width.
207: * Again, if p->overstep is negative,
208: * sign extension does the right thing.
209: */
1.130 kristaps 210:
1.174 schwarze 211: bp += (size_t)p->overstep;
1.129 kristaps 212: p->overstep = 0;
1.71 kristaps 213: }
1.138 schwarze 214:
1.130 kristaps 215: /* Write out the [remaining] word. */
1.188 kristaps 216: for ( ; i < p->col; i++) {
1.140 kristaps 217: if (vend > bp && jhy > 0 && i > jhy)
218: break;
1.138 schwarze 219: if ('\t' == p->buf[i])
220: break;
1.136 schwarze 221: if (' ' == p->buf[i]) {
1.164 kristaps 222: j = i;
1.228 kristaps 223: while (i < p->col && ' ' == p->buf[i])
1.136 schwarze 224: i++;
1.210 schwarze 225: dv = (i - j) * (*p->width)(p, ' ');
1.172 schwarze 226: vbl += dv;
227: vend += dv;
1.71 kristaps 228: break;
1.136 schwarze 229: }
230: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 231: vbl += (*p->width)(p, ' ');
1.136 schwarze 232: continue;
233: }
1.216 schwarze 234: if (ASCII_BREAK == p->buf[i])
235: continue;
1.130 kristaps 236:
1.136 schwarze 237: /*
238: * Now we definitely know there will be
239: * printable characters to output,
240: * so write preceding white space now.
241: */
242: if (vbl) {
1.146 kristaps 243: (*p->advance)(p, vbl);
1.139 schwarze 244: p->viscol += vbl;
1.136 schwarze 245: vbl = 0;
1.200 schwarze 246: }
247:
248: (*p->letter)(p, p->buf[i]);
249: if (8 == p->buf[i])
250: p->viscol -= (*p->width)(p, p->buf[i-1]);
1.222 schwarze 251: else
1.153 kristaps 252: p->viscol += (*p->width)(p, p->buf[i]);
1.136 schwarze 253: }
254: vis = vend;
1.71 kristaps 255: }
1.168 schwarze 256:
257: /*
258: * If there was trailing white space, it was not printed;
259: * so reset the cursor position accordingly.
260: */
1.200 schwarze 261: if (vis)
262: vis -= vbl;
1.111 kristaps 263:
1.91 kristaps 264: p->col = 0;
1.129 kristaps 265: p->overstep = 0;
1.15 kristaps 266:
1.91 kristaps 267: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 268: p->viscol = 0;
1.146 kristaps 269: (*p->endline)(p);
1.15 kristaps 270: return;
1.71 kristaps 271: }
1.15 kristaps 272:
1.91 kristaps 273: if (TERMP_HANG & p->flags) {
1.211 schwarze 274: p->overstep = (int)(vis - maxvis +
1.222 schwarze 275: p->trailspace * (*p->width)(p, ' '));
1.91 kristaps 276:
277: /*
1.92 kristaps 278: * If we have overstepped the margin, temporarily move
279: * it to the right and flag the rest of the line to be
280: * shorter.
1.212 schwarze 281: * If there is a request to keep the columns together,
282: * allow negative overstep when the column is not full.
1.91 kristaps 283: */
1.212 schwarze 284: if (p->trailspace && p->overstep < 0)
1.129 kristaps 285: p->overstep = 0;
1.200 schwarze 286: return;
1.91 kristaps 287:
288: } else if (TERMP_DANGLE & p->flags)
289: return;
1.15 kristaps 290:
1.200 schwarze 291: /* If the column was overrun, break the line. */
1.211 schwarze 292: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.146 kristaps 293: (*p->endline)(p);
1.200 schwarze 294: p->viscol = 0;
1.91 kristaps 295: }
1.15 kristaps 296: }
297:
1.222 schwarze 298: /*
1.71 kristaps 299: * A newline only breaks an existing line; it won't assert vertical
300: * space. All data in the output buffer is flushed prior to the newline
301: * assertion.
302: */
303: void
304: term_newln(struct termp *p)
1.15 kristaps 305: {
306:
1.71 kristaps 307: p->flags |= TERMP_NOSPACE;
1.200 schwarze 308: if (p->col || p->viscol)
309: term_flushln(p);
1.16 kristaps 310: }
311:
1.71 kristaps 312: /*
313: * Asserts a vertical space (a full, empty line-break between lines).
314: * Note that if used twice, this will cause two blank spaces and so on.
315: * All data in the output buffer is flushed prior to the newline
316: * assertion.
317: */
318: void
319: term_vspace(struct termp *p)
1.16 kristaps 320: {
321:
1.62 kristaps 322: term_newln(p);
1.139 schwarze 323: p->viscol = 0;
1.202 schwarze 324: if (0 < p->skipvsp)
325: p->skipvsp--;
326: else
327: (*p->endline)(p);
1.16 kristaps 328: }
329:
1.125 kristaps 330: void
331: term_fontlast(struct termp *p)
332: {
333: enum termfont f;
334:
335: f = p->fontl;
336: p->fontl = p->fontq[p->fonti];
337: p->fontq[p->fonti] = f;
338: }
339:
340: void
341: term_fontrepl(struct termp *p, enum termfont f)
342: {
343:
344: p->fontl = p->fontq[p->fonti];
345: p->fontq[p->fonti] = f;
346: }
347:
348: void
349: term_fontpush(struct termp *p, enum termfont f)
350: {
351:
352: assert(p->fonti + 1 < 10);
353: p->fontl = p->fontq[p->fonti];
354: p->fontq[++p->fonti] = f;
355: }
356:
357: const void *
358: term_fontq(struct termp *p)
359: {
360:
361: return(&p->fontq[p->fonti]);
362: }
363:
364: enum termfont
365: term_fonttop(struct termp *p)
366: {
367:
368: return(p->fontq[p->fonti]);
369: }
370:
371: void
372: term_fontpopq(struct termp *p, const void *key)
373: {
374:
1.206 schwarze 375: while (p->fonti >= 0 && key < (void *)(p->fontq + p->fonti))
1.125 kristaps 376: p->fonti--;
377: assert(p->fonti >= 0);
378: }
1.94 kristaps 379:
1.125 kristaps 380: void
381: term_fontpop(struct termp *p)
382: {
383:
384: assert(p->fonti);
385: p->fonti--;
1.17 kristaps 386: }
387:
1.71 kristaps 388: /*
389: * Handle pwords, partial words, which may be either a single word or a
390: * phrase that cannot be broken down (such as a literal string). This
391: * handles word styling.
392: */
1.86 kristaps 393: void
394: term_word(struct termp *p, const char *word)
1.65 kristaps 395: {
1.214 schwarze 396: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 397: const char *seq, *cp;
398: char c;
1.194 kristaps 399: int sz, uc;
1.124 kristaps 400: size_t ssz;
1.184 kristaps 401: enum mandoc_esc esc;
1.100 kristaps 402:
1.133 kristaps 403: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 404: if ( ! (TERMP_KEEP & p->flags)) {
1.133 kristaps 405: bufferc(p, ' ');
1.151 schwarze 406: if (TERMP_SENTENCE & p->flags)
407: bufferc(p, ' ');
408: } else
409: bufferc(p, ASCII_NBRSP);
1.133 kristaps 410: }
1.207 schwarze 411: if (TERMP_PREKEEP & p->flags)
412: p->flags |= TERMP_KEEP;
1.65 kristaps 413:
1.71 kristaps 414: if ( ! (p->flags & TERMP_NONOSPACE))
415: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 416: else
417: p->flags |= TERMP_NOSPACE;
1.133 kristaps 418:
1.213 schwarze 419: p->flags &= ~TERMP_SENTENCE;
1.65 kristaps 420:
1.184 kristaps 421: while ('\0' != *word) {
1.203 schwarze 422: if ('\\' != *word) {
423: if (TERMP_SKIPCHAR & p->flags) {
424: p->flags &= ~TERMP_SKIPCHAR;
425: word++;
426: continue;
427: }
1.214 schwarze 428: if (TERMP_NBRWORD & p->flags) {
429: if (' ' == *word) {
430: encode(p, nbrsp, 1);
431: word++;
432: continue;
433: }
434: ssz = strcspn(word, "\\ ");
435: } else
436: ssz = strcspn(word, "\\");
1.162 kristaps 437: encode(p, word, ssz);
1.203 schwarze 438: word += (int)ssz;
1.124 kristaps 439: continue;
1.203 schwarze 440: }
1.124 kristaps 441:
1.184 kristaps 442: word++;
443: esc = mandoc_escape(&word, &seq, &sz);
444: if (ESCAPE_ERROR == esc)
1.224 schwarze 445: continue;
1.124 kristaps 446:
1.184 kristaps 447: switch (esc) {
1.222 schwarze 448: case ESCAPE_UNICODE:
1.229 schwarze 449: uc = mchars_num2uc(seq + 1, sz - 1);
450: if (p->enc == TERMENC_ASCII) {
451: cp = ascii_uc2str(uc);
452: encode(p, cp, strlen(cp));
453: } else
454: encode1(p, uc);
1.192 kristaps 455: break;
1.222 schwarze 456: case ESCAPE_NUMBERED:
1.196 kristaps 457: c = mchars_num2char(seq, sz);
458: if ('\0' != c)
1.191 kristaps 459: encode(p, &c, 1);
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);
465: if (cp == NULL)
466: encode(p, "<?>", 3);
467: else
468: encode(p, cp, ssz);
469: } else {
470: uc = mchars_spec2cp(p->symtab, seq, sz);
1.230 ! schwarze 471: if (uc > 0)
! 472: encode1(p, uc);
1.229 schwarze 473: }
1.124 kristaps 474: break;
1.222 schwarze 475: case ESCAPE_FONTBOLD:
1.125 kristaps 476: term_fontrepl(p, TERMFONT_BOLD);
1.124 kristaps 477: break;
1.222 schwarze 478: case ESCAPE_FONTITALIC:
1.125 kristaps 479: term_fontrepl(p, TERMFONT_UNDER);
1.124 kristaps 480: break;
1.222 schwarze 481: case ESCAPE_FONTBI:
1.209 schwarze 482: term_fontrepl(p, TERMFONT_BI);
483: break;
1.222 schwarze 484: case ESCAPE_FONT:
1.195 kristaps 485: /* FALLTHROUGH */
1.222 schwarze 486: case ESCAPE_FONTROMAN:
1.125 kristaps 487: term_fontrepl(p, TERMFONT_NONE);
1.124 kristaps 488: break;
1.222 schwarze 489: case ESCAPE_FONTPREV:
1.125 kristaps 490: term_fontlast(p);
1.124 kristaps 491: break;
1.222 schwarze 492: case ESCAPE_NOSPACE:
1.203 schwarze 493: if (TERMP_SKIPCHAR & p->flags)
494: p->flags &= ~TERMP_SKIPCHAR;
495: else if ('\0' == *word)
1.184 kristaps 496: p->flags |= TERMP_NOSPACE;
497: break;
1.222 schwarze 498: case ESCAPE_SKIPCHAR:
1.203 schwarze 499: p->flags |= TERMP_SKIPCHAR;
500: break;
1.124 kristaps 501: default:
502: break;
503: }
504: }
1.214 schwarze 505: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 506: }
507:
1.71 kristaps 508: static void
1.210 schwarze 509: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 510: {
511:
1.125 kristaps 512: if (0 == p->maxcols)
513: p->maxcols = 1024;
514: while (sz >= p->maxcols)
515: p->maxcols <<= 2;
516:
1.223 schwarze 517: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.51 kristaps 518: }
519:
1.79 kristaps 520: static void
1.125 kristaps 521: bufferc(struct termp *p, char c)
522: {
523:
524: if (p->col + 1 >= p->maxcols)
525: adjbuf(p, p->col + 1);
526:
1.188 kristaps 527: p->buf[p->col++] = c;
1.125 kristaps 528: }
529:
1.194 kristaps 530: /*
531: * See encode().
532: * Do this for a single (probably unicode) value.
533: * Does not check for non-decorated glyphs.
534: */
535: static void
536: encode1(struct termp *p, int c)
537: {
538: enum termfont f;
539:
1.203 schwarze 540: if (TERMP_SKIPCHAR & p->flags) {
541: p->flags &= ~TERMP_SKIPCHAR;
542: return;
543: }
544:
1.209 schwarze 545: if (p->col + 6 >= p->maxcols)
546: adjbuf(p, p->col + 6);
1.194 kristaps 547:
548: f = term_fonttop(p);
549:
1.209 schwarze 550: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.194 kristaps 551: p->buf[p->col++] = '_';
1.209 schwarze 552: p->buf[p->col++] = 8;
553: }
554: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
555: if (ASCII_HYPH == c)
556: p->buf[p->col++] = '-';
557: else
558: p->buf[p->col++] = c;
559: p->buf[p->col++] = 8;
560: }
1.194 kristaps 561: p->buf[p->col++] = c;
562: }
563:
1.125 kristaps 564: static void
565: encode(struct termp *p, const char *word, size_t sz)
566: {
1.210 schwarze 567: size_t i;
1.188 kristaps 568:
1.203 schwarze 569: if (TERMP_SKIPCHAR & p->flags) {
570: p->flags &= ~TERMP_SKIPCHAR;
571: return;
572: }
573:
1.125 kristaps 574: /*
575: * Encode and buffer a string of characters. If the current
576: * font mode is unset, buffer directly, else encode then buffer
577: * character by character.
578: */
579:
1.209 schwarze 580: if (TERMFONT_NONE == term_fonttop(p)) {
1.222 schwarze 581: if (p->col + sz >= p->maxcols)
1.210 schwarze 582: adjbuf(p, p->col + sz);
583: for (i = 0; i < sz; i++)
1.188 kristaps 584: p->buf[p->col++] = word[i];
1.125 kristaps 585: return;
586: }
587:
1.165 kristaps 588: /* Pre-buffer, assuming worst-case. */
589:
1.210 schwarze 590: if (p->col + 1 + (sz * 5) >= p->maxcols)
591: adjbuf(p, p->col + 1 + (sz * 5));
1.165 kristaps 592:
1.210 schwarze 593: for (i = 0; i < sz; i++) {
1.209 schwarze 594: if (ASCII_HYPH == word[i] ||
595: isgraph((unsigned char)word[i]))
596: encode1(p, word[i]);
1.125 kristaps 597: else
1.188 kristaps 598: p->buf[p->col++] = word[i];
1.79 kristaps 599: }
1.219 schwarze 600: }
601:
602: void
603: term_setwidth(struct termp *p, const char *wstr)
604: {
605: struct roffsu su;
606: size_t width;
607: int iop;
608:
1.220 schwarze 609: iop = 0;
610: width = 0;
1.219 schwarze 611: if (NULL != wstr) {
612: switch (*wstr) {
1.222 schwarze 613: case '+':
1.219 schwarze 614: iop = 1;
615: wstr++;
616: break;
1.222 schwarze 617: case '-':
1.219 schwarze 618: iop = -1;
619: wstr++;
620: break;
621: default:
622: break;
623: }
1.220 schwarze 624: if (a2roffsu(wstr, &su, SCALE_MAX))
625: width = term_hspan(p, &su);
626: else
1.219 schwarze 627: iop = 0;
628: }
629: (*p->setwidth)(p, iop, width);
1.79 kristaps 630: }
1.106 kristaps 631:
1.107 kristaps 632: size_t
1.149 kristaps 633: term_len(const struct termp *p, size_t sz)
634: {
635:
636: return((*p->width)(p, ' ') * sz);
637: }
638:
1.203 schwarze 639: static size_t
640: cond_width(const struct termp *p, int c, int *skip)
641: {
642:
643: if (*skip) {
644: (*skip) = 0;
645: return(0);
646: } else
647: return((*p->width)(p, c));
648: }
1.149 kristaps 649:
650: size_t
651: term_strlen(const struct termp *p, const char *cp)
652: {
1.184 kristaps 653: size_t sz, rsz, i;
1.203 schwarze 654: int ssz, skip, c;
1.171 kristaps 655: const char *seq, *rhs;
1.196 kristaps 656: enum mandoc_esc esc;
1.216 schwarze 657: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
658: ASCII_BREAK, '\0' };
1.171 kristaps 659:
1.184 kristaps 660: /*
661: * Account for escaped sequences within string length
662: * calculations. This follows the logic in term_word() as we
663: * must calculate the width of produced strings.
664: */
665:
666: sz = 0;
1.203 schwarze 667: skip = 0;
1.189 kristaps 668: while ('\0' != *cp) {
669: rsz = strcspn(cp, rej);
670: for (i = 0; i < rsz; i++)
1.203 schwarze 671: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 672:
1.184 kristaps 673: switch (*cp) {
1.222 schwarze 674: case '\\':
1.189 kristaps 675: cp++;
1.196 kristaps 676: esc = mandoc_escape(&cp, &seq, &ssz);
677: if (ESCAPE_ERROR == esc)
1.224 schwarze 678: continue;
1.196 kristaps 679:
680: rhs = NULL;
681:
682: switch (esc) {
1.222 schwarze 683: case ESCAPE_UNICODE:
1.229 schwarze 684: c = mchars_num2uc(seq + 1, sz - 1);
685: if (p->enc == TERMENC_ASCII) {
686: rhs = ascii_uc2str(c);
687: rsz = strlen(rhs);
688: } else
689: sz += cond_width(p, c, &skip);
1.194 kristaps 690: break;
1.222 schwarze 691: case ESCAPE_NUMBERED:
1.194 kristaps 692: c = mchars_num2char(seq, ssz);
1.190 kristaps 693: if ('\0' != c)
1.203 schwarze 694: sz += cond_width(p, c, &skip);
1.171 kristaps 695: break;
1.222 schwarze 696: case ESCAPE_SPECIAL:
1.229 schwarze 697: if (p->enc == TERMENC_ASCII) {
698: rhs = mchars_spec2str(p->symtab,
699: seq, ssz, &rsz);
700: if (rhs == NULL) {
701: rhs = "<?>";
702: rsz = 3;
703: }
704: } else {
705: c = mchars_spec2cp(p->symtab,
706: seq, ssz);
1.230 ! schwarze 707: if (c > 0)
! 708: sz += cond_width(p, c, &skip);
1.229 schwarze 709: }
1.171 kristaps 710: break;
1.222 schwarze 711: case ESCAPE_SKIPCHAR:
1.203 schwarze 712: skip = 1;
713: break;
1.171 kristaps 714: default:
715: break;
716: }
1.149 kristaps 717:
1.184 kristaps 718: if (NULL == rhs)
719: break;
720:
1.203 schwarze 721: if (skip) {
722: skip = 0;
723: break;
724: }
725:
1.184 kristaps 726: for (i = 0; i < rsz; i++)
727: sz += (*p->width)(p, *rhs++);
728: break;
1.222 schwarze 729: case ASCII_NBRSP:
1.203 schwarze 730: sz += cond_width(p, ' ', &skip);
1.176 kristaps 731: cp++;
1.184 kristaps 732: break;
1.222 schwarze 733: case ASCII_HYPH:
1.203 schwarze 734: sz += cond_width(p, '-', &skip);
1.176 kristaps 735: cp++;
1.216 schwarze 736: /* FALLTHROUGH */
1.222 schwarze 737: case ASCII_BREAK:
1.184 kristaps 738: break;
739: default:
740: break;
741: }
1.189 kristaps 742: }
1.149 kristaps 743:
744: return(sz);
745: }
746:
747: size_t
748: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 749: {
750: double r;
751:
1.107 kristaps 752: switch (su->unit) {
1.222 schwarze 753: case SCALE_CM:
1.225 schwarze 754: r = su->scale * 2.0;
1.106 kristaps 755: break;
1.222 schwarze 756: case SCALE_IN:
1.225 schwarze 757: r = su->scale * 6.0;
1.106 kristaps 758: break;
1.222 schwarze 759: case SCALE_PC:
1.107 kristaps 760: r = su->scale;
1.106 kristaps 761: break;
1.222 schwarze 762: case SCALE_PT:
1.225 schwarze 763: r = su->scale / 8.0;
1.106 kristaps 764: break;
1.222 schwarze 765: case SCALE_MM:
1.225 schwarze 766: r = su->scale / 1000.0;
1.106 kristaps 767: break;
1.222 schwarze 768: case SCALE_VS:
1.107 kristaps 769: r = su->scale;
1.106 kristaps 770: break;
771: default:
1.225 schwarze 772: r = su->scale - 1.0;
1.106 kristaps 773: break;
774: }
775:
776: if (r < 0.0)
777: r = 0.0;
1.226 schwarze 778: return((size_t)(r + 0.0005));
1.106 kristaps 779: }
780:
1.107 kristaps 781: size_t
1.149 kristaps 782: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 783: {
1.156 kristaps 784: double v;
1.108 kristaps 785:
1.225 schwarze 786: v = (*p->hspan)(p, su);
1.156 kristaps 787: if (v < 0.0)
788: v = 0.0;
1.226 schwarze 789: return((size_t)(v + 0.0005));
1.106 kristaps 790: }
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