Annotation of mandoc/term.c, Revision 1.249
1.249 ! schwarze 1: /* $Id: term.c,v 1.248 2015/04/29 18:35:00 schwarze Exp $ */
1.1 kristaps 2: /*
1.198 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.243 schwarze 4: * Copyright (c) 2010-2015 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: *
1.246 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.74 kristaps 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.246 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.74 kristaps 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,
1.246 schwarze 52: term_margin foot, const struct roff_meta *arg)
1.142 kristaps 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;
1.248 schwarze 268: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE);
1.15 kristaps 269:
1.91 kristaps 270: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 271: p->viscol = 0;
1.146 kristaps 272: (*p->endline)(p);
1.15 kristaps 273: return;
1.71 kristaps 274: }
1.15 kristaps 275:
1.91 kristaps 276: if (TERMP_HANG & p->flags) {
1.242 schwarze 277: p->overstep += (int)(p->offset + vis - p->rmargin +
1.222 schwarze 278: p->trailspace * (*p->width)(p, ' '));
1.91 kristaps 279:
280: /*
1.92 kristaps 281: * If we have overstepped the margin, temporarily move
282: * it to the right and flag the rest of the line to be
283: * shorter.
1.212 schwarze 284: * If there is a request to keep the columns together,
285: * allow negative overstep when the column is not full.
1.91 kristaps 286: */
1.212 schwarze 287: if (p->trailspace && p->overstep < 0)
1.129 kristaps 288: p->overstep = 0;
1.200 schwarze 289: return;
1.91 kristaps 290:
291: } else if (TERMP_DANGLE & p->flags)
292: return;
1.15 kristaps 293:
1.200 schwarze 294: /* If the column was overrun, break the line. */
1.211 schwarze 295: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.146 kristaps 296: (*p->endline)(p);
1.200 schwarze 297: p->viscol = 0;
1.91 kristaps 298: }
1.15 kristaps 299: }
300:
1.222 schwarze 301: /*
1.71 kristaps 302: * A newline only breaks an existing line; it won't assert vertical
303: * space. All data in the output buffer is flushed prior to the newline
304: * assertion.
305: */
306: void
307: term_newln(struct termp *p)
1.15 kristaps 308: {
309:
1.71 kristaps 310: p->flags |= TERMP_NOSPACE;
1.200 schwarze 311: if (p->col || p->viscol)
312: term_flushln(p);
1.16 kristaps 313: }
314:
1.71 kristaps 315: /*
316: * Asserts a vertical space (a full, empty line-break between lines).
317: * Note that if used twice, this will cause two blank spaces and so on.
318: * All data in the output buffer is flushed prior to the newline
319: * assertion.
320: */
321: void
322: term_vspace(struct termp *p)
1.16 kristaps 323: {
324:
1.62 kristaps 325: term_newln(p);
1.139 schwarze 326: p->viscol = 0;
1.202 schwarze 327: if (0 < p->skipvsp)
328: p->skipvsp--;
329: else
330: (*p->endline)(p);
1.16 kristaps 331: }
332:
1.238 schwarze 333: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 334: void
335: term_fontlast(struct termp *p)
336: {
337: enum termfont f;
338:
339: f = p->fontl;
340: p->fontl = p->fontq[p->fonti];
341: p->fontq[p->fonti] = f;
342: }
343:
1.238 schwarze 344: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 345: void
346: term_fontrepl(struct termp *p, enum termfont f)
347: {
348:
349: p->fontl = p->fontq[p->fonti];
350: p->fontq[p->fonti] = f;
351: }
352:
1.238 schwarze 353: /* Set font, save previous. */
1.125 kristaps 354: void
355: term_fontpush(struct termp *p, enum termfont f)
356: {
357:
358: p->fontl = p->fontq[p->fonti];
1.238 schwarze 359: if (++p->fonti == p->fontsz) {
360: p->fontsz += 8;
361: p->fontq = mandoc_reallocarray(p->fontq,
362: p->fontsz, sizeof(enum termfont *));
363: }
364: p->fontq[p->fonti] = f;
1.125 kristaps 365: }
366:
1.238 schwarze 367: /* Flush to make the saved pointer current again. */
1.125 kristaps 368: void
1.244 schwarze 369: term_fontpopq(struct termp *p, int i)
1.125 kristaps 370: {
371:
1.244 schwarze 372: assert(i >= 0);
373: if (p->fonti > i)
374: p->fonti = i;
1.125 kristaps 375: }
1.94 kristaps 376:
1.238 schwarze 377: /* Pop one font off the stack. */
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:
1.237 schwarze 416: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
1.245 schwarze 417: p->skipvsp = 0;
1.65 kristaps 418:
1.184 kristaps 419: while ('\0' != *word) {
1.203 schwarze 420: if ('\\' != *word) {
1.214 schwarze 421: if (TERMP_NBRWORD & p->flags) {
422: if (' ' == *word) {
423: encode(p, nbrsp, 1);
424: word++;
425: continue;
426: }
427: ssz = strcspn(word, "\\ ");
428: } else
429: ssz = strcspn(word, "\\");
1.162 kristaps 430: encode(p, word, ssz);
1.203 schwarze 431: word += (int)ssz;
1.124 kristaps 432: continue;
1.203 schwarze 433: }
1.124 kristaps 434:
1.184 kristaps 435: word++;
436: esc = mandoc_escape(&word, &seq, &sz);
437: if (ESCAPE_ERROR == esc)
1.224 schwarze 438: continue;
1.124 kristaps 439:
1.184 kristaps 440: switch (esc) {
1.222 schwarze 441: case ESCAPE_UNICODE:
1.229 schwarze 442: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 443: break;
1.222 schwarze 444: case ESCAPE_NUMBERED:
1.233 schwarze 445: uc = mchars_num2char(seq, sz);
446: if (uc < 0)
447: continue;
1.184 kristaps 448: break;
1.222 schwarze 449: case ESCAPE_SPECIAL:
1.229 schwarze 450: if (p->enc == TERMENC_ASCII) {
451: cp = mchars_spec2str(p->symtab,
452: seq, sz, &ssz);
1.232 schwarze 453: if (cp != NULL)
1.229 schwarze 454: encode(p, cp, ssz);
455: } else {
456: uc = mchars_spec2cp(p->symtab, seq, sz);
1.230 schwarze 457: if (uc > 0)
458: encode1(p, uc);
1.229 schwarze 459: }
1.233 schwarze 460: continue;
1.222 schwarze 461: case ESCAPE_FONTBOLD:
1.125 kristaps 462: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 463: continue;
1.222 schwarze 464: case ESCAPE_FONTITALIC:
1.125 kristaps 465: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 466: continue;
1.222 schwarze 467: case ESCAPE_FONTBI:
1.209 schwarze 468: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 469: continue;
1.222 schwarze 470: case ESCAPE_FONT:
1.195 kristaps 471: /* FALLTHROUGH */
1.222 schwarze 472: case ESCAPE_FONTROMAN:
1.125 kristaps 473: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 474: continue;
1.222 schwarze 475: case ESCAPE_FONTPREV:
1.125 kristaps 476: term_fontlast(p);
1.233 schwarze 477: continue;
1.222 schwarze 478: case ESCAPE_NOSPACE:
1.248 schwarze 479: if (p->flags & TERMP_BACKAFTER)
480: p->flags &= ~TERMP_BACKAFTER;
481: else if (*word == '\0')
1.237 schwarze 482: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.233 schwarze 483: continue;
1.222 schwarze 484: case ESCAPE_SKIPCHAR:
1.248 schwarze 485: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 486: continue;
1.243 schwarze 487: case ESCAPE_OVERSTRIKE:
488: cp = seq + sz;
489: while (seq < cp) {
490: if (*seq == '\\') {
491: mandoc_escape(&seq, NULL, NULL);
492: continue;
493: }
494: encode1(p, *seq++);
1.248 schwarze 495: if (seq < cp) {
496: if (p->flags & TERMP_BACKBEFORE)
497: p->flags |= TERMP_BACKAFTER;
498: else
499: p->flags |= TERMP_BACKBEFORE;
500: }
1.243 schwarze 501: }
1.249 ! schwarze 502: /* Trim trailing backspace/blank pair. */
! 503: if (p->col > 2 && p->buf[p->col - 1] == ' ')
! 504: p->col -= 2;
1.248 schwarze 505: continue;
1.124 kristaps 506: default:
1.233 schwarze 507: continue;
508: }
509:
510: /*
511: * Common handling for Unicode and numbered
512: * character escape sequences.
513: */
514:
515: if (p->enc == TERMENC_ASCII) {
516: cp = ascii_uc2str(uc);
517: encode(p, cp, strlen(cp));
518: } else {
519: if ((uc < 0x20 && uc != 0x09) ||
520: (uc > 0x7E && uc < 0xA0))
521: uc = 0xFFFD;
522: encode1(p, uc);
1.124 kristaps 523: }
524: }
1.214 schwarze 525: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 526: }
527:
1.71 kristaps 528: static void
1.210 schwarze 529: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 530: {
531:
1.125 kristaps 532: if (0 == p->maxcols)
533: p->maxcols = 1024;
534: while (sz >= p->maxcols)
535: p->maxcols <<= 2;
536:
1.223 schwarze 537: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.51 kristaps 538: }
539:
1.79 kristaps 540: static void
1.125 kristaps 541: bufferc(struct termp *p, char c)
542: {
543:
544: if (p->col + 1 >= p->maxcols)
545: adjbuf(p, p->col + 1);
546:
1.188 kristaps 547: p->buf[p->col++] = c;
1.125 kristaps 548: }
549:
1.194 kristaps 550: /*
551: * See encode().
552: * Do this for a single (probably unicode) value.
553: * Does not check for non-decorated glyphs.
554: */
555: static void
556: encode1(struct termp *p, int c)
557: {
558: enum termfont f;
559:
1.248 schwarze 560: if (p->col + 7 >= p->maxcols)
561: adjbuf(p, p->col + 7);
1.194 kristaps 562:
1.248 schwarze 563: f = (c == ASCII_HYPH || isgraph(c)) ?
564: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 565:
1.248 schwarze 566: if (p->flags & TERMP_BACKBEFORE) {
1.249 ! schwarze 567: if (p->buf[p->col - 1] == ' ')
! 568: p->col--;
! 569: else
! 570: p->buf[p->col++] = 8;
1.248 schwarze 571: p->flags &= ~TERMP_BACKBEFORE;
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;
1.248 schwarze 585: if (p->flags & TERMP_BACKAFTER) {
586: p->flags |= TERMP_BACKBEFORE;
587: p->flags &= ~TERMP_BACKAFTER;
588: }
1.194 kristaps 589: }
590:
1.125 kristaps 591: static void
592: encode(struct termp *p, const char *word, size_t sz)
593: {
1.210 schwarze 594: size_t i;
1.188 kristaps 595:
1.248 schwarze 596: if (p->col + 2 + (sz * 5) >= p->maxcols)
597: adjbuf(p, p->col + 2 + (sz * 5));
1.165 kristaps 598:
1.210 schwarze 599: for (i = 0; i < sz; i++) {
1.209 schwarze 600: if (ASCII_HYPH == word[i] ||
601: isgraph((unsigned char)word[i]))
602: encode1(p, word[i]);
1.125 kristaps 603: else
1.188 kristaps 604: p->buf[p->col++] = word[i];
1.79 kristaps 605: }
1.219 schwarze 606: }
607:
608: void
609: term_setwidth(struct termp *p, const char *wstr)
610: {
611: struct roffsu su;
1.247 schwarze 612: int iop, width;
1.219 schwarze 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;
1.243 schwarze 711: continue;
712: case ESCAPE_OVERSTRIKE:
713: rsz = 0;
714: rhs = seq + ssz;
715: while (seq < rhs) {
716: if (*seq == '\\') {
717: mandoc_escape(&seq, NULL, NULL);
718: continue;
719: }
720: i = (*p->width)(p, *seq++);
721: if (rsz < i)
722: rsz = i;
723: }
724: sz += rsz;
1.233 schwarze 725: continue;
1.171 kristaps 726: default:
1.233 schwarze 727: continue;
1.171 kristaps 728: }
1.149 kristaps 729:
1.233 schwarze 730: /*
731: * Common handling for Unicode and numbered
732: * character escape sequences.
733: */
734:
735: if (rhs == NULL) {
736: if (p->enc == TERMENC_ASCII) {
737: rhs = ascii_uc2str(uc);
738: rsz = strlen(rhs);
739: } else {
740: if ((uc < 0x20 && uc != 0x09) ||
741: (uc > 0x7E && uc < 0xA0))
742: uc = 0xFFFD;
743: sz += cond_width(p, uc, &skip);
744: continue;
745: }
746: }
1.184 kristaps 747:
1.203 schwarze 748: if (skip) {
749: skip = 0;
750: break;
751: }
1.233 schwarze 752:
753: /*
754: * Common handling for all escape sequences
755: * printing more than one character.
756: */
1.203 schwarze 757:
1.184 kristaps 758: for (i = 0; i < rsz; i++)
759: sz += (*p->width)(p, *rhs++);
760: break;
1.222 schwarze 761: case ASCII_NBRSP:
1.203 schwarze 762: sz += cond_width(p, ' ', &skip);
1.176 kristaps 763: cp++;
1.184 kristaps 764: break;
1.222 schwarze 765: case ASCII_HYPH:
1.203 schwarze 766: sz += cond_width(p, '-', &skip);
1.176 kristaps 767: cp++;
1.216 schwarze 768: /* FALLTHROUGH */
1.222 schwarze 769: case ASCII_BREAK:
1.184 kristaps 770: break;
771: default:
772: break;
773: }
1.189 kristaps 774: }
1.149 kristaps 775:
776: return(sz);
777: }
778:
1.240 schwarze 779: int
1.149 kristaps 780: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 781: {
782: double r;
1.241 schwarze 783: int ri;
1.106 kristaps 784:
1.107 kristaps 785: switch (su->unit) {
1.239 schwarze 786: case SCALE_BU:
787: r = su->scale / 40.0;
788: break;
1.222 schwarze 789: case SCALE_CM:
1.239 schwarze 790: r = su->scale * 6.0 / 2.54;
791: break;
792: case SCALE_FS:
793: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 794: break;
1.222 schwarze 795: case SCALE_IN:
1.225 schwarze 796: r = su->scale * 6.0;
1.106 kristaps 797: break;
1.239 schwarze 798: case SCALE_MM:
799: r = su->scale * 0.006;
800: break;
1.222 schwarze 801: case SCALE_PC:
1.107 kristaps 802: r = su->scale;
1.106 kristaps 803: break;
1.222 schwarze 804: case SCALE_PT:
1.239 schwarze 805: r = su->scale / 12.0;
1.106 kristaps 806: break;
1.239 schwarze 807: case SCALE_EN:
808: /* FALLTHROUGH */
809: case SCALE_EM:
810: r = su->scale * 0.6;
1.106 kristaps 811: break;
1.222 schwarze 812: case SCALE_VS:
1.107 kristaps 813: r = su->scale;
1.106 kristaps 814: break;
815: default:
1.239 schwarze 816: abort();
817: /* NOTREACHED */
1.106 kristaps 818: }
1.241 schwarze 819: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
820: return(ri < 66 ? ri : 1);
1.106 kristaps 821: }
822:
1.247 schwarze 823: /*
824: * Convert a scaling width to basic units, rounding down.
825: */
1.240 schwarze 826: int
1.149 kristaps 827: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 828: {
1.108 kristaps 829:
1.247 schwarze 830: return((*p->hspan)(p, su));
1.106 kristaps 831: }
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