Annotation of mandoc/term.c, Revision 1.235
1.235 ! schwarze 1: /* $Id: term.c,v 1.234 2014/11/01 04:03:49 schwarze Exp $ */
1.1 kristaps 2: /*
1.198 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.216 schwarze 4: * Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.74 kristaps 7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 9: *
1.74 kristaps 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 kristaps 17: */
1.128 kristaps 18: #include "config.h"
19:
1.126 kristaps 20: #include <sys/types.h>
21:
1.1 kristaps 22: #include <assert.h>
1.122 kristaps 23: #include <ctype.h>
1.22 kristaps 24: #include <stdio.h>
1.1 kristaps 25: #include <stdlib.h>
26: #include <string.h>
27:
1.137 kristaps 28: #include "mandoc.h"
1.218 schwarze 29: #include "mandoc_aux.h"
1.107 kristaps 30: #include "out.h"
1.71 kristaps 31: #include "term.h"
1.105 kristaps 32: #include "main.h"
1.1 kristaps 33:
1.203 schwarze 34: static size_t cond_width(const struct termp *, int, int *);
1.210 schwarze 35: static void adjbuf(struct termp *p, size_t);
1.191 kristaps 36: static void bufferc(struct termp *, char);
37: static void encode(struct termp *, const char *, size_t);
1.194 kristaps 38: static void encode1(struct termp *, int);
1.11 kristaps 39:
1.222 schwarze 40:
1.145 kristaps 41: void
1.71 kristaps 42: term_free(struct termp *p)
1.14 kristaps 43: {
44:
1.231 schwarze 45: free(p->buf);
1.142 kristaps 46: free(p);
47: }
48:
49: void
1.222 schwarze 50: term_begin(struct termp *p, term_margin head,
1.142 kristaps 51: term_margin foot, const void *arg)
52: {
53:
54: p->headf = head;
55: p->footf = foot;
56: p->argf = arg;
1.146 kristaps 57: (*p->begin)(p);
1.142 kristaps 58: }
59:
60: void
61: term_end(struct termp *p)
62: {
63:
1.146 kristaps 64: (*p->end)(p);
1.14 kristaps 65: }
66:
1.71 kristaps 67: /*
1.221 schwarze 68: * Flush a chunk of text. By default, break the output line each time
69: * the right margin is reached, and continue output on the next line
70: * at the same offset as the chunk itself. By default, also break the
71: * output line at the end of the chunk.
1.130 kristaps 72: * The following flags may be specified:
1.71 kristaps 73: *
1.221 schwarze 74: * - TERMP_NOBREAK: Do not break the output line at the right margin,
75: * but only at the max right margin. Also, do not break the output
76: * line at the end of the chunk, such that the next call can pad to
77: * the next column. However, if less than p->trailspace blanks,
78: * which can be 0, 1, or 2, remain to the right margin, the line
79: * will be broken.
80: * - TERMP_BRIND: If the chunk does not fit and the output line has
81: * to be broken, start the next line at the right margin instead
82: * of at the offset. Used together with TERMP_NOBREAK for the tags
83: * in various kinds of tagged lists.
84: * - TERMP_DANGLE: Do not break the output line at the right margin,
85: * append the next chunk after it even if this one is too long.
86: * To be used together with TERMP_NOBREAK.
87: * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
88: * the next chunk if this column is not full.
1.71 kristaps 89: */
90: void
91: term_flushln(struct termp *p)
1.53 kristaps 92: {
1.210 schwarze 93: size_t i; /* current input position in p->buf */
1.205 schwarze 94: int ntab; /* number of tabs to prepend */
1.114 kristaps 95: size_t vis; /* current visual position on output */
96: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 97: size_t vend; /* end of word visual position on output */
1.114 kristaps 98: size_t bp; /* visual right border position */
1.172 schwarze 99: size_t dv; /* temporary for visual pos calculations */
1.210 schwarze 100: size_t j; /* temporary loop index for p->buf */
101: size_t jhy; /* last hyph before overflow w/r/t j */
1.152 kristaps 102: size_t maxvis; /* output position of visible boundary */
103: size_t mmax; /* used in calculating bp */
1.53 kristaps 104:
1.71 kristaps 105: /*
106: * First, establish the maximum columns of "visible" content.
107: * This is usually the difference between the right-margin and
108: * an indentation, but can be, for tagged lists or columns, a
1.212 schwarze 109: * small set of values.
110: *
111: * The following unsigned-signed subtractions look strange,
112: * but they are actually correct. If the int p->overstep
113: * is negative, it gets sign extended. Subtracting that
114: * very large size_t effectively adds a small number to dv.
1.71 kristaps 115: */
1.175 kristaps 116: assert (p->rmargin >= p->offset);
1.174 schwarze 117: dv = p->rmargin - p->offset;
118: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
119: dv = p->maxrmargin - p->offset;
120: mmax = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 121:
1.71 kristaps 122: bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
1.115 kristaps 123:
1.136 schwarze 124: /*
1.200 schwarze 125: * Calculate the required amount of padding.
1.136 schwarze 126: */
1.200 schwarze 127: vbl = p->offset + p->overstep > p->viscol ?
128: p->offset + p->overstep - p->viscol : 0;
1.136 schwarze 129:
1.174 schwarze 130: vis = vend = 0;
131: i = 0;
1.115 kristaps 132:
1.188 kristaps 133: while (i < p->col) {
1.71 kristaps 134: /*
1.154 kristaps 135: * Handle literal tab characters: collapse all
136: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 137: */
1.205 schwarze 138: ntab = 0;
1.188 kristaps 139: while (i < p->col && '\t' == p->buf[i]) {
1.154 kristaps 140: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 141: vbl += vend - vis;
142: vis = vend;
1.205 schwarze 143: ntab++;
1.169 schwarze 144: i++;
1.138 schwarze 145: }
146:
147: /*
1.71 kristaps 148: * Count up visible word characters. Control sequences
149: * (starting with the CSI) aren't counted. A space
150: * generates a non-printing word, which is valid (the
151: * space is printed according to regular spacing rules).
152: */
153:
1.188 kristaps 154: for (j = i, jhy = 0; j < p->col; j++) {
1.208 schwarze 155: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.71 kristaps 156: break;
1.154 kristaps 157:
158: /* Back over the the last printed character. */
159: if (8 == p->buf[j]) {
1.153 kristaps 160: assert(j);
161: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 162: continue;
1.153 kristaps 163: }
1.154 kristaps 164:
165: /* Regular word. */
166: /* Break at the hyphen point if we overrun. */
1.222 schwarze 167: if (vend > vis && vend < bp &&
1.216 schwarze 168: (ASCII_HYPH == p->buf[j] ||
169: ASCII_BREAK == p->buf[j]))
1.154 kristaps 170: jhy = j;
171:
1.217 schwarze 172: /*
173: * Hyphenation now decided, put back a real
174: * hyphen such that we get the correct width.
175: */
176: if (ASCII_HYPH == p->buf[j])
177: p->buf[j] = '-';
178:
1.154 kristaps 179: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 180: }
1.53 kristaps 181:
1.71 kristaps 182: /*
1.81 kristaps 183: * Find out whether we would exceed the right margin.
1.136 schwarze 184: * If so, break to the next line.
1.81 kristaps 185: */
1.140 kristaps 186: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 187: vend -= vis;
1.146 kristaps 188: (*p->endline)(p);
1.201 schwarze 189: p->viscol = 0;
1.221 schwarze 190: if (TERMP_BRIND & p->flags) {
1.201 schwarze 191: vbl = p->rmargin;
1.136 schwarze 192: vend += p->rmargin - p->offset;
1.201 schwarze 193: } else
1.136 schwarze 194: vbl = p->offset;
1.205 schwarze 195:
196: /* use pending tabs on the new line */
197:
198: if (0 < ntab)
199: vbl += ntab * p->tabwidth;
1.130 kristaps 200:
1.212 schwarze 201: /*
202: * Remove the p->overstep width.
203: * Again, if p->overstep is negative,
204: * sign extension does the right thing.
205: */
1.130 kristaps 206:
1.174 schwarze 207: bp += (size_t)p->overstep;
1.129 kristaps 208: p->overstep = 0;
1.71 kristaps 209: }
1.138 schwarze 210:
1.130 kristaps 211: /* Write out the [remaining] word. */
1.188 kristaps 212: for ( ; i < p->col; i++) {
1.140 kristaps 213: if (vend > bp && jhy > 0 && i > jhy)
214: break;
1.138 schwarze 215: if ('\t' == p->buf[i])
216: break;
1.136 schwarze 217: if (' ' == p->buf[i]) {
1.164 kristaps 218: j = i;
1.228 kristaps 219: while (i < p->col && ' ' == p->buf[i])
1.136 schwarze 220: i++;
1.210 schwarze 221: dv = (i - j) * (*p->width)(p, ' ');
1.172 schwarze 222: vbl += dv;
223: vend += dv;
1.71 kristaps 224: break;
1.136 schwarze 225: }
226: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 227: vbl += (*p->width)(p, ' ');
1.136 schwarze 228: continue;
229: }
1.216 schwarze 230: if (ASCII_BREAK == p->buf[i])
231: continue;
1.130 kristaps 232:
1.136 schwarze 233: /*
234: * Now we definitely know there will be
235: * printable characters to output,
236: * so write preceding white space now.
237: */
238: if (vbl) {
1.146 kristaps 239: (*p->advance)(p, vbl);
1.139 schwarze 240: p->viscol += vbl;
1.136 schwarze 241: vbl = 0;
1.200 schwarze 242: }
243:
244: (*p->letter)(p, p->buf[i]);
245: if (8 == p->buf[i])
246: p->viscol -= (*p->width)(p, p->buf[i-1]);
1.222 schwarze 247: else
1.153 kristaps 248: p->viscol += (*p->width)(p, p->buf[i]);
1.136 schwarze 249: }
250: vis = vend;
1.71 kristaps 251: }
1.168 schwarze 252:
253: /*
254: * If there was trailing white space, it was not printed;
255: * so reset the cursor position accordingly.
256: */
1.235 ! schwarze 257: if (vis > vbl)
1.200 schwarze 258: vis -= vbl;
1.235 ! schwarze 259: else
! 260: vis = 0;
1.111 kristaps 261:
1.91 kristaps 262: p->col = 0;
1.129 kristaps 263: p->overstep = 0;
1.15 kristaps 264:
1.91 kristaps 265: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 266: p->viscol = 0;
1.146 kristaps 267: (*p->endline)(p);
1.15 kristaps 268: return;
1.71 kristaps 269: }
1.15 kristaps 270:
1.91 kristaps 271: if (TERMP_HANG & p->flags) {
1.211 schwarze 272: p->overstep = (int)(vis - maxvis +
1.222 schwarze 273: p->trailspace * (*p->width)(p, ' '));
1.91 kristaps 274:
275: /*
1.92 kristaps 276: * If we have overstepped the margin, temporarily move
277: * it to the right and flag the rest of the line to be
278: * shorter.
1.212 schwarze 279: * If there is a request to keep the columns together,
280: * allow negative overstep when the column is not full.
1.91 kristaps 281: */
1.212 schwarze 282: if (p->trailspace && p->overstep < 0)
1.129 kristaps 283: p->overstep = 0;
1.200 schwarze 284: return;
1.91 kristaps 285:
286: } else if (TERMP_DANGLE & p->flags)
287: return;
1.15 kristaps 288:
1.200 schwarze 289: /* If the column was overrun, break the line. */
1.211 schwarze 290: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.146 kristaps 291: (*p->endline)(p);
1.200 schwarze 292: p->viscol = 0;
1.91 kristaps 293: }
1.15 kristaps 294: }
295:
1.222 schwarze 296: /*
1.71 kristaps 297: * A newline only breaks an existing line; it won't assert vertical
298: * space. All data in the output buffer is flushed prior to the newline
299: * assertion.
300: */
301: void
302: term_newln(struct termp *p)
1.15 kristaps 303: {
304:
1.71 kristaps 305: p->flags |= TERMP_NOSPACE;
1.200 schwarze 306: if (p->col || p->viscol)
307: term_flushln(p);
1.16 kristaps 308: }
309:
1.71 kristaps 310: /*
311: * Asserts a vertical space (a full, empty line-break between lines).
312: * Note that if used twice, this will cause two blank spaces and so on.
313: * All data in the output buffer is flushed prior to the newline
314: * assertion.
315: */
316: void
317: term_vspace(struct termp *p)
1.16 kristaps 318: {
319:
1.62 kristaps 320: term_newln(p);
1.139 schwarze 321: p->viscol = 0;
1.202 schwarze 322: if (0 < p->skipvsp)
323: p->skipvsp--;
324: else
325: (*p->endline)(p);
1.16 kristaps 326: }
327:
1.125 kristaps 328: void
329: term_fontlast(struct termp *p)
330: {
331: enum termfont f;
332:
333: f = p->fontl;
334: p->fontl = p->fontq[p->fonti];
335: p->fontq[p->fonti] = f;
336: }
337:
338: void
339: term_fontrepl(struct termp *p, enum termfont f)
340: {
341:
342: p->fontl = p->fontq[p->fonti];
343: p->fontq[p->fonti] = f;
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: const void *
356: term_fontq(struct termp *p)
357: {
358:
359: return(&p->fontq[p->fonti]);
360: }
361:
362: enum termfont
363: term_fonttop(struct termp *p)
364: {
365:
366: return(p->fontq[p->fonti]);
367: }
368:
369: void
370: term_fontpopq(struct termp *p, const void *key)
371: {
372:
1.206 schwarze 373: while (p->fonti >= 0 && key < (void *)(p->fontq + p->fonti))
1.125 kristaps 374: p->fonti--;
375: assert(p->fonti >= 0);
376: }
1.94 kristaps 377:
1.125 kristaps 378: void
379: term_fontpop(struct termp *p)
380: {
381:
382: assert(p->fonti);
383: p->fonti--;
1.17 kristaps 384: }
385:
1.71 kristaps 386: /*
387: * Handle pwords, partial words, which may be either a single word or a
388: * phrase that cannot be broken down (such as a literal string). This
389: * handles word styling.
390: */
1.86 kristaps 391: void
392: term_word(struct termp *p, const char *word)
1.65 kristaps 393: {
1.214 schwarze 394: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 395: const char *seq, *cp;
1.194 kristaps 396: int sz, uc;
1.124 kristaps 397: size_t ssz;
1.184 kristaps 398: enum mandoc_esc esc;
1.100 kristaps 399:
1.133 kristaps 400: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 401: if ( ! (TERMP_KEEP & p->flags)) {
1.133 kristaps 402: bufferc(p, ' ');
1.151 schwarze 403: if (TERMP_SENTENCE & p->flags)
404: bufferc(p, ' ');
405: } else
406: bufferc(p, ASCII_NBRSP);
1.133 kristaps 407: }
1.207 schwarze 408: if (TERMP_PREKEEP & p->flags)
409: p->flags |= TERMP_KEEP;
1.65 kristaps 410:
1.71 kristaps 411: if ( ! (p->flags & TERMP_NONOSPACE))
412: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 413: else
414: p->flags |= TERMP_NOSPACE;
1.133 kristaps 415:
1.213 schwarze 416: p->flags &= ~TERMP_SENTENCE;
1.65 kristaps 417:
1.184 kristaps 418: while ('\0' != *word) {
1.203 schwarze 419: if ('\\' != *word) {
420: if (TERMP_SKIPCHAR & p->flags) {
421: p->flags &= ~TERMP_SKIPCHAR;
422: word++;
423: continue;
424: }
1.214 schwarze 425: if (TERMP_NBRWORD & p->flags) {
426: if (' ' == *word) {
427: encode(p, nbrsp, 1);
428: word++;
429: continue;
430: }
431: ssz = strcspn(word, "\\ ");
432: } else
433: ssz = strcspn(word, "\\");
1.162 kristaps 434: encode(p, word, ssz);
1.203 schwarze 435: word += (int)ssz;
1.124 kristaps 436: continue;
1.203 schwarze 437: }
1.124 kristaps 438:
1.184 kristaps 439: word++;
440: esc = mandoc_escape(&word, &seq, &sz);
441: if (ESCAPE_ERROR == esc)
1.224 schwarze 442: continue;
1.124 kristaps 443:
1.184 kristaps 444: switch (esc) {
1.222 schwarze 445: case ESCAPE_UNICODE:
1.229 schwarze 446: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 447: break;
1.222 schwarze 448: case ESCAPE_NUMBERED:
1.233 schwarze 449: uc = mchars_num2char(seq, sz);
450: if (uc < 0)
451: continue;
1.184 kristaps 452: break;
1.222 schwarze 453: case ESCAPE_SPECIAL:
1.229 schwarze 454: if (p->enc == TERMENC_ASCII) {
455: cp = mchars_spec2str(p->symtab,
456: seq, sz, &ssz);
1.232 schwarze 457: if (cp != NULL)
1.229 schwarze 458: encode(p, cp, ssz);
459: } else {
460: uc = mchars_spec2cp(p->symtab, seq, sz);
1.230 schwarze 461: if (uc > 0)
462: encode1(p, uc);
1.229 schwarze 463: }
1.233 schwarze 464: continue;
1.222 schwarze 465: case ESCAPE_FONTBOLD:
1.125 kristaps 466: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 467: continue;
1.222 schwarze 468: case ESCAPE_FONTITALIC:
1.125 kristaps 469: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 470: continue;
1.222 schwarze 471: case ESCAPE_FONTBI:
1.209 schwarze 472: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 473: continue;
1.222 schwarze 474: case ESCAPE_FONT:
1.195 kristaps 475: /* FALLTHROUGH */
1.222 schwarze 476: case ESCAPE_FONTROMAN:
1.125 kristaps 477: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 478: continue;
1.222 schwarze 479: case ESCAPE_FONTPREV:
1.125 kristaps 480: term_fontlast(p);
1.233 schwarze 481: continue;
1.222 schwarze 482: case ESCAPE_NOSPACE:
1.203 schwarze 483: if (TERMP_SKIPCHAR & p->flags)
484: p->flags &= ~TERMP_SKIPCHAR;
485: else if ('\0' == *word)
1.184 kristaps 486: p->flags |= TERMP_NOSPACE;
1.233 schwarze 487: continue;
1.222 schwarze 488: case ESCAPE_SKIPCHAR:
1.203 schwarze 489: p->flags |= TERMP_SKIPCHAR;
1.233 schwarze 490: continue;
1.124 kristaps 491: default:
1.233 schwarze 492: continue;
493: }
494:
495: /*
496: * Common handling for Unicode and numbered
497: * character escape sequences.
498: */
499:
500: if (p->enc == TERMENC_ASCII) {
501: cp = ascii_uc2str(uc);
502: encode(p, cp, strlen(cp));
503: } else {
504: if ((uc < 0x20 && uc != 0x09) ||
505: (uc > 0x7E && uc < 0xA0))
506: uc = 0xFFFD;
507: encode1(p, uc);
1.124 kristaps 508: }
509: }
1.214 schwarze 510: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 511: }
512:
1.71 kristaps 513: static void
1.210 schwarze 514: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 515: {
516:
1.125 kristaps 517: if (0 == p->maxcols)
518: p->maxcols = 1024;
519: while (sz >= p->maxcols)
520: p->maxcols <<= 2;
521:
1.223 schwarze 522: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.51 kristaps 523: }
524:
1.79 kristaps 525: static void
1.125 kristaps 526: bufferc(struct termp *p, char c)
527: {
528:
529: if (p->col + 1 >= p->maxcols)
530: adjbuf(p, p->col + 1);
531:
1.188 kristaps 532: p->buf[p->col++] = c;
1.125 kristaps 533: }
534:
1.194 kristaps 535: /*
536: * See encode().
537: * Do this for a single (probably unicode) value.
538: * Does not check for non-decorated glyphs.
539: */
540: static void
541: encode1(struct termp *p, int c)
542: {
543: enum termfont f;
544:
1.203 schwarze 545: if (TERMP_SKIPCHAR & p->flags) {
546: p->flags &= ~TERMP_SKIPCHAR;
547: return;
548: }
549:
1.209 schwarze 550: if (p->col + 6 >= p->maxcols)
551: adjbuf(p, p->col + 6);
1.194 kristaps 552:
553: f = term_fonttop(p);
554:
1.209 schwarze 555: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.194 kristaps 556: p->buf[p->col++] = '_';
1.209 schwarze 557: p->buf[p->col++] = 8;
558: }
559: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
560: if (ASCII_HYPH == c)
561: p->buf[p->col++] = '-';
562: else
563: p->buf[p->col++] = c;
564: p->buf[p->col++] = 8;
565: }
1.194 kristaps 566: p->buf[p->col++] = c;
567: }
568:
1.125 kristaps 569: static void
570: encode(struct termp *p, const char *word, size_t sz)
571: {
1.210 schwarze 572: size_t i;
1.188 kristaps 573:
1.203 schwarze 574: if (TERMP_SKIPCHAR & p->flags) {
575: p->flags &= ~TERMP_SKIPCHAR;
576: return;
577: }
578:
1.125 kristaps 579: /*
580: * Encode and buffer a string of characters. If the current
581: * font mode is unset, buffer directly, else encode then buffer
582: * character by character.
583: */
584:
1.209 schwarze 585: if (TERMFONT_NONE == term_fonttop(p)) {
1.222 schwarze 586: if (p->col + sz >= p->maxcols)
1.210 schwarze 587: adjbuf(p, p->col + sz);
588: for (i = 0; i < sz; i++)
1.188 kristaps 589: p->buf[p->col++] = word[i];
1.125 kristaps 590: return;
591: }
592:
1.165 kristaps 593: /* Pre-buffer, assuming worst-case. */
594:
1.210 schwarze 595: if (p->col + 1 + (sz * 5) >= p->maxcols)
596: adjbuf(p, p->col + 1 + (sz * 5));
1.165 kristaps 597:
1.210 schwarze 598: for (i = 0; i < sz; i++) {
1.209 schwarze 599: if (ASCII_HYPH == word[i] ||
600: isgraph((unsigned char)word[i]))
601: encode1(p, word[i]);
1.125 kristaps 602: else
1.188 kristaps 603: p->buf[p->col++] = word[i];
1.79 kristaps 604: }
1.219 schwarze 605: }
606:
607: void
608: term_setwidth(struct termp *p, const char *wstr)
609: {
610: struct roffsu su;
611: size_t width;
612: int iop;
613:
1.220 schwarze 614: iop = 0;
615: width = 0;
1.219 schwarze 616: if (NULL != wstr) {
617: switch (*wstr) {
1.222 schwarze 618: case '+':
1.219 schwarze 619: iop = 1;
620: wstr++;
621: break;
1.222 schwarze 622: case '-':
1.219 schwarze 623: iop = -1;
624: wstr++;
625: break;
626: default:
627: break;
628: }
1.220 schwarze 629: if (a2roffsu(wstr, &su, SCALE_MAX))
630: width = term_hspan(p, &su);
631: else
1.219 schwarze 632: iop = 0;
633: }
634: (*p->setwidth)(p, iop, width);
1.79 kristaps 635: }
1.106 kristaps 636:
1.107 kristaps 637: size_t
1.149 kristaps 638: term_len(const struct termp *p, size_t sz)
639: {
640:
641: return((*p->width)(p, ' ') * sz);
642: }
643:
1.203 schwarze 644: static size_t
645: cond_width(const struct termp *p, int c, int *skip)
646: {
647:
648: if (*skip) {
649: (*skip) = 0;
650: return(0);
651: } else
652: return((*p->width)(p, c));
653: }
1.149 kristaps 654:
655: size_t
656: term_strlen(const struct termp *p, const char *cp)
657: {
1.184 kristaps 658: size_t sz, rsz, i;
1.233 schwarze 659: int ssz, skip, uc;
1.171 kristaps 660: const char *seq, *rhs;
1.196 kristaps 661: enum mandoc_esc esc;
1.216 schwarze 662: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
663: ASCII_BREAK, '\0' };
1.171 kristaps 664:
1.184 kristaps 665: /*
666: * Account for escaped sequences within string length
667: * calculations. This follows the logic in term_word() as we
668: * must calculate the width of produced strings.
669: */
670:
671: sz = 0;
1.203 schwarze 672: skip = 0;
1.189 kristaps 673: while ('\0' != *cp) {
674: rsz = strcspn(cp, rej);
675: for (i = 0; i < rsz; i++)
1.203 schwarze 676: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 677:
1.184 kristaps 678: switch (*cp) {
1.222 schwarze 679: case '\\':
1.189 kristaps 680: cp++;
1.196 kristaps 681: esc = mandoc_escape(&cp, &seq, &ssz);
682: if (ESCAPE_ERROR == esc)
1.224 schwarze 683: continue;
1.196 kristaps 684:
685: rhs = NULL;
686:
687: switch (esc) {
1.222 schwarze 688: case ESCAPE_UNICODE:
1.234 schwarze 689: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 690: break;
1.222 schwarze 691: case ESCAPE_NUMBERED:
1.233 schwarze 692: uc = mchars_num2char(seq, ssz);
693: if (uc < 0)
694: continue;
1.171 kristaps 695: break;
1.222 schwarze 696: case ESCAPE_SPECIAL:
1.233 schwarze 697: if (p->enc == TERMENC_ASCII) {
1.229 schwarze 698: rhs = mchars_spec2str(p->symtab,
699: seq, ssz, &rsz);
1.233 schwarze 700: if (rhs != NULL)
701: break;
702: } else {
703: uc = mchars_spec2cp(p->symtab,
1.229 schwarze 704: seq, ssz);
1.233 schwarze 705: if (uc > 0)
706: sz += cond_width(p, uc, &skip);
1.229 schwarze 707: }
1.233 schwarze 708: continue;
1.222 schwarze 709: case ESCAPE_SKIPCHAR:
1.203 schwarze 710: skip = 1;
1.233 schwarze 711: continue;
1.171 kristaps 712: default:
1.233 schwarze 713: continue;
1.171 kristaps 714: }
1.149 kristaps 715:
1.233 schwarze 716: /*
717: * Common handling for Unicode and numbered
718: * character escape sequences.
719: */
720:
721: if (rhs == NULL) {
722: if (p->enc == TERMENC_ASCII) {
723: rhs = ascii_uc2str(uc);
724: rsz = strlen(rhs);
725: } else {
726: if ((uc < 0x20 && uc != 0x09) ||
727: (uc > 0x7E && uc < 0xA0))
728: uc = 0xFFFD;
729: sz += cond_width(p, uc, &skip);
730: continue;
731: }
732: }
1.184 kristaps 733:
1.203 schwarze 734: if (skip) {
735: skip = 0;
736: break;
737: }
1.233 schwarze 738:
739: /*
740: * Common handling for all escape sequences
741: * printing more than one character.
742: */
1.203 schwarze 743:
1.184 kristaps 744: for (i = 0; i < rsz; i++)
745: sz += (*p->width)(p, *rhs++);
746: break;
1.222 schwarze 747: case ASCII_NBRSP:
1.203 schwarze 748: sz += cond_width(p, ' ', &skip);
1.176 kristaps 749: cp++;
1.184 kristaps 750: break;
1.222 schwarze 751: case ASCII_HYPH:
1.203 schwarze 752: sz += cond_width(p, '-', &skip);
1.176 kristaps 753: cp++;
1.216 schwarze 754: /* FALLTHROUGH */
1.222 schwarze 755: case ASCII_BREAK:
1.184 kristaps 756: break;
757: default:
758: break;
759: }
1.189 kristaps 760: }
1.149 kristaps 761:
762: return(sz);
763: }
764:
765: size_t
766: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 767: {
768: double r;
769:
1.107 kristaps 770: switch (su->unit) {
1.222 schwarze 771: case SCALE_CM:
1.225 schwarze 772: r = su->scale * 2.0;
1.106 kristaps 773: break;
1.222 schwarze 774: case SCALE_IN:
1.225 schwarze 775: r = su->scale * 6.0;
1.106 kristaps 776: break;
1.222 schwarze 777: case SCALE_PC:
1.107 kristaps 778: r = su->scale;
1.106 kristaps 779: break;
1.222 schwarze 780: case SCALE_PT:
1.225 schwarze 781: r = su->scale / 8.0;
1.106 kristaps 782: break;
1.222 schwarze 783: case SCALE_MM:
1.225 schwarze 784: r = su->scale / 1000.0;
1.106 kristaps 785: break;
1.222 schwarze 786: case SCALE_VS:
1.107 kristaps 787: r = su->scale;
1.106 kristaps 788: break;
789: default:
1.225 schwarze 790: r = su->scale - 1.0;
1.106 kristaps 791: break;
792: }
793:
794: if (r < 0.0)
795: r = 0.0;
1.226 schwarze 796: return((size_t)(r + 0.0005));
1.106 kristaps 797: }
798:
1.107 kristaps 799: size_t
1.149 kristaps 800: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 801: {
1.156 kristaps 802: double v;
1.108 kristaps 803:
1.225 schwarze 804: v = (*p->hspan)(p, su);
1.156 kristaps 805: if (v < 0.0)
806: v = 0.0;
1.226 schwarze 807: return((size_t)(v + 0.0005));
1.106 kristaps 808: }
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