Annotation of mandoc/term.c, Revision 1.240
1.240 ! schwarze 1: /* $Id: term.c,v 1.239 2014/12/23 06:16:46 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);
1.238 schwarze 46: free(p->fontq);
1.142 kristaps 47: free(p);
48: }
49:
50: void
1.222 schwarze 51: term_begin(struct termp *p, term_margin head,
1.142 kristaps 52: term_margin foot, const void *arg)
53: {
54:
55: p->headf = head;
56: p->footf = foot;
57: p->argf = arg;
1.146 kristaps 58: (*p->begin)(p);
1.142 kristaps 59: }
60:
61: void
62: term_end(struct termp *p)
63: {
64:
1.146 kristaps 65: (*p->end)(p);
1.14 kristaps 66: }
67:
1.71 kristaps 68: /*
1.221 schwarze 69: * Flush a chunk of text. By default, break the output line each time
70: * the right margin is reached, and continue output on the next line
71: * at the same offset as the chunk itself. By default, also break the
72: * output line at the end of the chunk.
1.130 kristaps 73: * The following flags may be specified:
1.71 kristaps 74: *
1.221 schwarze 75: * - TERMP_NOBREAK: Do not break the output line at the right margin,
76: * but only at the max right margin. Also, do not break the output
77: * line at the end of the chunk, such that the next call can pad to
78: * the next column. However, if less than p->trailspace blanks,
79: * which can be 0, 1, or 2, remain to the right margin, the line
80: * will be broken.
81: * - TERMP_BRIND: If the chunk does not fit and the output line has
82: * to be broken, start the next line at the right margin instead
83: * of at the offset. Used together with TERMP_NOBREAK for the tags
84: * in various kinds of tagged lists.
85: * - TERMP_DANGLE: Do not break the output line at the right margin,
86: * append the next chunk after it even if this one is too long.
87: * To be used together with TERMP_NOBREAK.
88: * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
89: * the next chunk if this column is not full.
1.71 kristaps 90: */
91: void
92: term_flushln(struct termp *p)
1.53 kristaps 93: {
1.210 schwarze 94: size_t i; /* current input position in p->buf */
1.205 schwarze 95: int ntab; /* number of tabs to prepend */
1.114 kristaps 96: size_t vis; /* current visual position on output */
97: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 98: size_t vend; /* end of word visual position on output */
1.114 kristaps 99: size_t bp; /* visual right border position */
1.172 schwarze 100: size_t dv; /* temporary for visual pos calculations */
1.210 schwarze 101: size_t j; /* temporary loop index for p->buf */
102: size_t jhy; /* last hyph before overflow w/r/t j */
1.152 kristaps 103: size_t maxvis; /* output position of visible boundary */
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: */
1.240 ! schwarze 116: dv = p->rmargin > p->offset ? p->rmargin - p->offset : 0;
1.174 schwarze 117: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 118:
1.236 schwarze 119: if (p->flags & TERMP_NOBREAK) {
120: dv = p->maxrmargin > p->offset ?
121: p->maxrmargin - p->offset : 0;
122: bp = (int)dv > p->overstep ?
123: dv - (size_t)p->overstep : 0;
124: } else
125: bp = maxvis;
1.115 kristaps 126:
1.136 schwarze 127: /*
1.200 schwarze 128: * Calculate the required amount of padding.
1.136 schwarze 129: */
1.200 schwarze 130: vbl = p->offset + p->overstep > p->viscol ?
131: p->offset + p->overstep - p->viscol : 0;
1.136 schwarze 132:
1.174 schwarze 133: vis = vend = 0;
134: i = 0;
1.115 kristaps 135:
1.188 kristaps 136: while (i < p->col) {
1.71 kristaps 137: /*
1.154 kristaps 138: * Handle literal tab characters: collapse all
139: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 140: */
1.205 schwarze 141: ntab = 0;
1.188 kristaps 142: while (i < p->col && '\t' == p->buf[i]) {
1.154 kristaps 143: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 144: vbl += vend - vis;
145: vis = vend;
1.205 schwarze 146: ntab++;
1.169 schwarze 147: i++;
1.138 schwarze 148: }
149:
150: /*
1.71 kristaps 151: * Count up visible word characters. Control sequences
152: * (starting with the CSI) aren't counted. A space
153: * generates a non-printing word, which is valid (the
154: * space is printed according to regular spacing rules).
155: */
156:
1.188 kristaps 157: for (j = i, jhy = 0; j < p->col; j++) {
1.208 schwarze 158: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.71 kristaps 159: break;
1.154 kristaps 160:
161: /* Back over the the last printed character. */
162: if (8 == p->buf[j]) {
1.153 kristaps 163: assert(j);
164: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 165: continue;
1.153 kristaps 166: }
1.154 kristaps 167:
168: /* Regular word. */
169: /* Break at the hyphen point if we overrun. */
1.222 schwarze 170: if (vend > vis && vend < bp &&
1.216 schwarze 171: (ASCII_HYPH == p->buf[j] ||
172: ASCII_BREAK == p->buf[j]))
1.154 kristaps 173: jhy = j;
174:
1.217 schwarze 175: /*
176: * Hyphenation now decided, put back a real
177: * hyphen such that we get the correct width.
178: */
179: if (ASCII_HYPH == p->buf[j])
180: p->buf[j] = '-';
181:
1.154 kristaps 182: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 183: }
1.53 kristaps 184:
1.71 kristaps 185: /*
1.81 kristaps 186: * Find out whether we would exceed the right margin.
1.136 schwarze 187: * If so, break to the next line.
1.81 kristaps 188: */
1.140 kristaps 189: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 190: vend -= vis;
1.146 kristaps 191: (*p->endline)(p);
1.201 schwarze 192: p->viscol = 0;
1.221 schwarze 193: if (TERMP_BRIND & p->flags) {
1.240 ! schwarze 194: vbl = p->rmargin;
! 195: vend += p->rmargin;
! 196: vend -= 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: */
1.235 schwarze 261: if (vis > vbl)
1.200 schwarze 262: vis -= vbl;
1.235 schwarze 263: else
264: vis = 0;
1.111 kristaps 265:
1.91 kristaps 266: p->col = 0;
1.129 kristaps 267: p->overstep = 0;
1.15 kristaps 268:
1.91 kristaps 269: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 270: p->viscol = 0;
1.146 kristaps 271: (*p->endline)(p);
1.15 kristaps 272: return;
1.71 kristaps 273: }
1.15 kristaps 274:
1.91 kristaps 275: if (TERMP_HANG & p->flags) {
1.211 schwarze 276: p->overstep = (int)(vis - maxvis +
1.222 schwarze 277: p->trailspace * (*p->width)(p, ' '));
1.91 kristaps 278:
279: /*
1.92 kristaps 280: * If we have overstepped the margin, temporarily move
281: * it to the right and flag the rest of the line to be
282: * shorter.
1.212 schwarze 283: * If there is a request to keep the columns together,
284: * allow negative overstep when the column is not full.
1.91 kristaps 285: */
1.212 schwarze 286: if (p->trailspace && p->overstep < 0)
1.129 kristaps 287: p->overstep = 0;
1.200 schwarze 288: return;
1.91 kristaps 289:
290: } else if (TERMP_DANGLE & p->flags)
291: return;
1.15 kristaps 292:
1.200 schwarze 293: /* If the column was overrun, break the line. */
1.211 schwarze 294: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.146 kristaps 295: (*p->endline)(p);
1.200 schwarze 296: p->viscol = 0;
1.91 kristaps 297: }
1.15 kristaps 298: }
299:
1.222 schwarze 300: /*
1.71 kristaps 301: * A newline only breaks an existing line; it won't assert vertical
302: * space. All data in the output buffer is flushed prior to the newline
303: * assertion.
304: */
305: void
306: term_newln(struct termp *p)
1.15 kristaps 307: {
308:
1.71 kristaps 309: p->flags |= TERMP_NOSPACE;
1.200 schwarze 310: if (p->col || p->viscol)
311: term_flushln(p);
1.16 kristaps 312: }
313:
1.71 kristaps 314: /*
315: * Asserts a vertical space (a full, empty line-break between lines).
316: * Note that if used twice, this will cause two blank spaces and so on.
317: * All data in the output buffer is flushed prior to the newline
318: * assertion.
319: */
320: void
321: term_vspace(struct termp *p)
1.16 kristaps 322: {
323:
1.62 kristaps 324: term_newln(p);
1.139 schwarze 325: p->viscol = 0;
1.202 schwarze 326: if (0 < p->skipvsp)
327: p->skipvsp--;
328: else
329: (*p->endline)(p);
1.16 kristaps 330: }
331:
1.238 schwarze 332: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 333: void
334: term_fontlast(struct termp *p)
335: {
336: enum termfont f;
337:
338: f = p->fontl;
339: p->fontl = p->fontq[p->fonti];
340: p->fontq[p->fonti] = f;
341: }
342:
1.238 schwarze 343: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 344: void
345: term_fontrepl(struct termp *p, enum termfont f)
346: {
347:
348: p->fontl = p->fontq[p->fonti];
349: p->fontq[p->fonti] = f;
350: }
351:
1.238 schwarze 352: /* Set font, save previous. */
1.125 kristaps 353: void
354: term_fontpush(struct termp *p, enum termfont f)
355: {
356:
357: p->fontl = p->fontq[p->fonti];
1.238 schwarze 358: if (++p->fonti == p->fontsz) {
359: p->fontsz += 8;
360: p->fontq = mandoc_reallocarray(p->fontq,
361: p->fontsz, sizeof(enum termfont *));
362: }
363: p->fontq[p->fonti] = f;
1.125 kristaps 364: }
365:
1.238 schwarze 366: /* Retrieve pointer to current font. */
367: const enum termfont *
1.125 kristaps 368: term_fontq(struct termp *p)
369: {
370:
371: return(&p->fontq[p->fonti]);
372: }
373:
1.238 schwarze 374: /* Flush to make the saved pointer current again. */
1.125 kristaps 375: void
1.238 schwarze 376: term_fontpopq(struct termp *p, const enum termfont *key)
1.125 kristaps 377: {
378:
1.238 schwarze 379: while (p->fonti >= 0 && key < p->fontq + p->fonti)
1.125 kristaps 380: p->fonti--;
381: assert(p->fonti >= 0);
382: }
1.94 kristaps 383:
1.238 schwarze 384: /* Pop one font off the stack. */
1.125 kristaps 385: void
386: term_fontpop(struct termp *p)
387: {
388:
389: assert(p->fonti);
390: p->fonti--;
1.17 kristaps 391: }
392:
1.71 kristaps 393: /*
394: * Handle pwords, partial words, which may be either a single word or a
395: * phrase that cannot be broken down (such as a literal string). This
396: * handles word styling.
397: */
1.86 kristaps 398: void
399: term_word(struct termp *p, const char *word)
1.65 kristaps 400: {
1.214 schwarze 401: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 402: const char *seq, *cp;
1.194 kristaps 403: int sz, uc;
1.124 kristaps 404: size_t ssz;
1.184 kristaps 405: enum mandoc_esc esc;
1.100 kristaps 406:
1.133 kristaps 407: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 408: if ( ! (TERMP_KEEP & p->flags)) {
1.133 kristaps 409: bufferc(p, ' ');
1.151 schwarze 410: if (TERMP_SENTENCE & p->flags)
411: bufferc(p, ' ');
412: } else
413: bufferc(p, ASCII_NBRSP);
1.133 kristaps 414: }
1.207 schwarze 415: if (TERMP_PREKEEP & p->flags)
416: p->flags |= TERMP_KEEP;
1.65 kristaps 417:
1.71 kristaps 418: if ( ! (p->flags & TERMP_NONOSPACE))
419: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 420: else
421: p->flags |= TERMP_NOSPACE;
1.133 kristaps 422:
1.237 schwarze 423: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
1.65 kristaps 424:
1.184 kristaps 425: while ('\0' != *word) {
1.203 schwarze 426: if ('\\' != *word) {
427: if (TERMP_SKIPCHAR & p->flags) {
428: p->flags &= ~TERMP_SKIPCHAR;
429: word++;
430: continue;
431: }
1.214 schwarze 432: if (TERMP_NBRWORD & p->flags) {
433: if (' ' == *word) {
434: encode(p, nbrsp, 1);
435: word++;
436: continue;
437: }
438: ssz = strcspn(word, "\\ ");
439: } else
440: ssz = strcspn(word, "\\");
1.162 kristaps 441: encode(p, word, ssz);
1.203 schwarze 442: word += (int)ssz;
1.124 kristaps 443: continue;
1.203 schwarze 444: }
1.124 kristaps 445:
1.184 kristaps 446: word++;
447: esc = mandoc_escape(&word, &seq, &sz);
448: if (ESCAPE_ERROR == esc)
1.224 schwarze 449: continue;
1.124 kristaps 450:
1.184 kristaps 451: switch (esc) {
1.222 schwarze 452: case ESCAPE_UNICODE:
1.229 schwarze 453: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 454: break;
1.222 schwarze 455: case ESCAPE_NUMBERED:
1.233 schwarze 456: uc = mchars_num2char(seq, sz);
457: if (uc < 0)
458: continue;
1.184 kristaps 459: break;
1.222 schwarze 460: case ESCAPE_SPECIAL:
1.229 schwarze 461: if (p->enc == TERMENC_ASCII) {
462: cp = mchars_spec2str(p->symtab,
463: seq, sz, &ssz);
1.232 schwarze 464: if (cp != NULL)
1.229 schwarze 465: encode(p, cp, ssz);
466: } else {
467: uc = mchars_spec2cp(p->symtab, seq, sz);
1.230 schwarze 468: if (uc > 0)
469: encode1(p, uc);
1.229 schwarze 470: }
1.233 schwarze 471: continue;
1.222 schwarze 472: case ESCAPE_FONTBOLD:
1.125 kristaps 473: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 474: continue;
1.222 schwarze 475: case ESCAPE_FONTITALIC:
1.125 kristaps 476: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 477: continue;
1.222 schwarze 478: case ESCAPE_FONTBI:
1.209 schwarze 479: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 480: continue;
1.222 schwarze 481: case ESCAPE_FONT:
1.195 kristaps 482: /* FALLTHROUGH */
1.222 schwarze 483: case ESCAPE_FONTROMAN:
1.125 kristaps 484: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 485: continue;
1.222 schwarze 486: case ESCAPE_FONTPREV:
1.125 kristaps 487: term_fontlast(p);
1.233 schwarze 488: continue;
1.222 schwarze 489: case ESCAPE_NOSPACE:
1.203 schwarze 490: if (TERMP_SKIPCHAR & p->flags)
491: p->flags &= ~TERMP_SKIPCHAR;
492: else if ('\0' == *word)
1.237 schwarze 493: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.233 schwarze 494: continue;
1.222 schwarze 495: case ESCAPE_SKIPCHAR:
1.203 schwarze 496: p->flags |= TERMP_SKIPCHAR;
1.233 schwarze 497: continue;
1.124 kristaps 498: default:
1.233 schwarze 499: continue;
500: }
501:
502: /*
503: * Common handling for Unicode and numbered
504: * character escape sequences.
505: */
506:
507: if (p->enc == TERMENC_ASCII) {
508: cp = ascii_uc2str(uc);
509: encode(p, cp, strlen(cp));
510: } else {
511: if ((uc < 0x20 && uc != 0x09) ||
512: (uc > 0x7E && uc < 0xA0))
513: uc = 0xFFFD;
514: encode1(p, uc);
1.124 kristaps 515: }
516: }
1.214 schwarze 517: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 518: }
519:
1.71 kristaps 520: static void
1.210 schwarze 521: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 522: {
523:
1.125 kristaps 524: if (0 == p->maxcols)
525: p->maxcols = 1024;
526: while (sz >= p->maxcols)
527: p->maxcols <<= 2;
528:
1.223 schwarze 529: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.51 kristaps 530: }
531:
1.79 kristaps 532: static void
1.125 kristaps 533: bufferc(struct termp *p, char c)
534: {
535:
536: if (p->col + 1 >= p->maxcols)
537: adjbuf(p, p->col + 1);
538:
1.188 kristaps 539: p->buf[p->col++] = c;
1.125 kristaps 540: }
541:
1.194 kristaps 542: /*
543: * See encode().
544: * Do this for a single (probably unicode) value.
545: * Does not check for non-decorated glyphs.
546: */
547: static void
548: encode1(struct termp *p, int c)
549: {
550: enum termfont f;
551:
1.203 schwarze 552: if (TERMP_SKIPCHAR & p->flags) {
553: p->flags &= ~TERMP_SKIPCHAR;
554: return;
555: }
556:
1.209 schwarze 557: if (p->col + 6 >= p->maxcols)
558: adjbuf(p, p->col + 6);
1.194 kristaps 559:
1.238 schwarze 560: f = *term_fontq(p);
1.194 kristaps 561:
1.209 schwarze 562: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.194 kristaps 563: p->buf[p->col++] = '_';
1.209 schwarze 564: p->buf[p->col++] = 8;
565: }
566: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
567: if (ASCII_HYPH == c)
568: p->buf[p->col++] = '-';
569: else
570: p->buf[p->col++] = c;
571: p->buf[p->col++] = 8;
572: }
1.194 kristaps 573: p->buf[p->col++] = c;
574: }
575:
1.125 kristaps 576: static void
577: encode(struct termp *p, const char *word, size_t sz)
578: {
1.210 schwarze 579: size_t i;
1.188 kristaps 580:
1.203 schwarze 581: if (TERMP_SKIPCHAR & p->flags) {
582: p->flags &= ~TERMP_SKIPCHAR;
583: return;
584: }
585:
1.125 kristaps 586: /*
587: * Encode and buffer a string of characters. If the current
588: * font mode is unset, buffer directly, else encode then buffer
589: * character by character.
590: */
591:
1.238 schwarze 592: if (*term_fontq(p) == TERMFONT_NONE) {
1.222 schwarze 593: if (p->col + sz >= p->maxcols)
1.210 schwarze 594: adjbuf(p, p->col + sz);
595: for (i = 0; i < sz; i++)
1.188 kristaps 596: p->buf[p->col++] = word[i];
1.125 kristaps 597: return;
598: }
599:
1.165 kristaps 600: /* Pre-buffer, assuming worst-case. */
601:
1.210 schwarze 602: if (p->col + 1 + (sz * 5) >= p->maxcols)
603: adjbuf(p, p->col + 1 + (sz * 5));
1.165 kristaps 604:
1.210 schwarze 605: for (i = 0; i < sz; i++) {
1.209 schwarze 606: if (ASCII_HYPH == word[i] ||
607: isgraph((unsigned char)word[i]))
608: encode1(p, word[i]);
1.125 kristaps 609: else
1.188 kristaps 610: p->buf[p->col++] = word[i];
1.79 kristaps 611: }
1.219 schwarze 612: }
613:
614: void
615: term_setwidth(struct termp *p, const char *wstr)
616: {
617: struct roffsu su;
618: size_t width;
619: int iop;
620:
1.220 schwarze 621: iop = 0;
622: width = 0;
1.219 schwarze 623: if (NULL != wstr) {
624: switch (*wstr) {
1.222 schwarze 625: case '+':
1.219 schwarze 626: iop = 1;
627: wstr++;
628: break;
1.222 schwarze 629: case '-':
1.219 schwarze 630: iop = -1;
631: wstr++;
632: break;
633: default:
634: break;
635: }
1.220 schwarze 636: if (a2roffsu(wstr, &su, SCALE_MAX))
637: width = term_hspan(p, &su);
638: else
1.219 schwarze 639: iop = 0;
640: }
641: (*p->setwidth)(p, iop, width);
1.79 kristaps 642: }
1.106 kristaps 643:
1.107 kristaps 644: size_t
1.149 kristaps 645: term_len(const struct termp *p, size_t sz)
646: {
647:
648: return((*p->width)(p, ' ') * sz);
649: }
650:
1.203 schwarze 651: static size_t
652: cond_width(const struct termp *p, int c, int *skip)
653: {
654:
655: if (*skip) {
656: (*skip) = 0;
657: return(0);
658: } else
659: return((*p->width)(p, c));
660: }
1.149 kristaps 661:
662: size_t
663: term_strlen(const struct termp *p, const char *cp)
664: {
1.184 kristaps 665: size_t sz, rsz, i;
1.233 schwarze 666: int ssz, skip, uc;
1.171 kristaps 667: const char *seq, *rhs;
1.196 kristaps 668: enum mandoc_esc esc;
1.216 schwarze 669: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
670: ASCII_BREAK, '\0' };
1.171 kristaps 671:
1.184 kristaps 672: /*
673: * Account for escaped sequences within string length
674: * calculations. This follows the logic in term_word() as we
675: * must calculate the width of produced strings.
676: */
677:
678: sz = 0;
1.203 schwarze 679: skip = 0;
1.189 kristaps 680: while ('\0' != *cp) {
681: rsz = strcspn(cp, rej);
682: for (i = 0; i < rsz; i++)
1.203 schwarze 683: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 684:
1.184 kristaps 685: switch (*cp) {
1.222 schwarze 686: case '\\':
1.189 kristaps 687: cp++;
1.196 kristaps 688: esc = mandoc_escape(&cp, &seq, &ssz);
689: if (ESCAPE_ERROR == esc)
1.224 schwarze 690: continue;
1.196 kristaps 691:
692: rhs = NULL;
693:
694: switch (esc) {
1.222 schwarze 695: case ESCAPE_UNICODE:
1.234 schwarze 696: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 697: break;
1.222 schwarze 698: case ESCAPE_NUMBERED:
1.233 schwarze 699: uc = mchars_num2char(seq, ssz);
700: if (uc < 0)
701: continue;
1.171 kristaps 702: break;
1.222 schwarze 703: case ESCAPE_SPECIAL:
1.233 schwarze 704: if (p->enc == TERMENC_ASCII) {
1.229 schwarze 705: rhs = mchars_spec2str(p->symtab,
706: seq, ssz, &rsz);
1.233 schwarze 707: if (rhs != NULL)
708: break;
709: } else {
710: uc = mchars_spec2cp(p->symtab,
1.229 schwarze 711: seq, ssz);
1.233 schwarze 712: if (uc > 0)
713: sz += cond_width(p, uc, &skip);
1.229 schwarze 714: }
1.233 schwarze 715: continue;
1.222 schwarze 716: case ESCAPE_SKIPCHAR:
1.203 schwarze 717: skip = 1;
1.233 schwarze 718: continue;
1.171 kristaps 719: default:
1.233 schwarze 720: continue;
1.171 kristaps 721: }
1.149 kristaps 722:
1.233 schwarze 723: /*
724: * Common handling for Unicode and numbered
725: * character escape sequences.
726: */
727:
728: if (rhs == NULL) {
729: if (p->enc == TERMENC_ASCII) {
730: rhs = ascii_uc2str(uc);
731: rsz = strlen(rhs);
732: } else {
733: if ((uc < 0x20 && uc != 0x09) ||
734: (uc > 0x7E && uc < 0xA0))
735: uc = 0xFFFD;
736: sz += cond_width(p, uc, &skip);
737: continue;
738: }
739: }
1.184 kristaps 740:
1.203 schwarze 741: if (skip) {
742: skip = 0;
743: break;
744: }
1.233 schwarze 745:
746: /*
747: * Common handling for all escape sequences
748: * printing more than one character.
749: */
1.203 schwarze 750:
1.184 kristaps 751: for (i = 0; i < rsz; i++)
752: sz += (*p->width)(p, *rhs++);
753: break;
1.222 schwarze 754: case ASCII_NBRSP:
1.203 schwarze 755: sz += cond_width(p, ' ', &skip);
1.176 kristaps 756: cp++;
1.184 kristaps 757: break;
1.222 schwarze 758: case ASCII_HYPH:
1.203 schwarze 759: sz += cond_width(p, '-', &skip);
1.176 kristaps 760: cp++;
1.216 schwarze 761: /* FALLTHROUGH */
1.222 schwarze 762: case ASCII_BREAK:
1.184 kristaps 763: break;
764: default:
765: break;
766: }
1.189 kristaps 767: }
1.149 kristaps 768:
769: return(sz);
770: }
771:
1.240 ! schwarze 772: int
1.149 kristaps 773: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 774: {
775: double r;
776:
1.107 kristaps 777: switch (su->unit) {
1.239 schwarze 778: case SCALE_BU:
779: r = su->scale / 40.0;
780: break;
1.222 schwarze 781: case SCALE_CM:
1.239 schwarze 782: r = su->scale * 6.0 / 2.54;
783: break;
784: case SCALE_FS:
785: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 786: break;
1.222 schwarze 787: case SCALE_IN:
1.225 schwarze 788: r = su->scale * 6.0;
1.106 kristaps 789: break;
1.239 schwarze 790: case SCALE_MM:
791: r = su->scale * 0.006;
792: break;
1.222 schwarze 793: case SCALE_PC:
1.107 kristaps 794: r = su->scale;
1.106 kristaps 795: break;
1.222 schwarze 796: case SCALE_PT:
1.239 schwarze 797: r = su->scale / 12.0;
1.106 kristaps 798: break;
1.239 schwarze 799: case SCALE_EN:
800: /* FALLTHROUGH */
801: case SCALE_EM:
802: r = su->scale * 0.6;
1.106 kristaps 803: break;
1.222 schwarze 804: case SCALE_VS:
1.107 kristaps 805: r = su->scale;
1.106 kristaps 806: break;
807: default:
1.239 schwarze 808: abort();
809: /* NOTREACHED */
1.106 kristaps 810: }
1.240 ! schwarze 811: return(r > 0.0 ? r + 0.4995 : r - 0.4995);
1.106 kristaps 812: }
813:
1.240 ! schwarze 814: int
1.149 kristaps 815: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 816: {
1.156 kristaps 817: double v;
1.108 kristaps 818:
1.225 schwarze 819: v = (*p->hspan)(p, su);
1.240 ! schwarze 820: return(v > 0.0 ? v + 0.0005 : v - 0.0005);
1.106 kristaps 821: }
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