Annotation of mandoc/term.c, Revision 1.259
1.259 ! schwarze 1: /* $Id: term.c,v 1.258 2016/08/10 11:03:43 schwarze Exp $ */
1.1 kristaps 2: /*
1.198 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.259 ! schwarze 4: * Copyright (c) 2010-2017 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.
1.250 schwarze 81: * - TERMP_BRTRSP: Consider trailing whitespace significant
82: * when deciding whether the chunk fits or not.
1.221 schwarze 83: * - TERMP_BRIND: If the chunk does not fit and the output line has
84: * to be broken, start the next line at the right margin instead
85: * of at the offset. Used together with TERMP_NOBREAK for the tags
86: * in various kinds of tagged lists.
87: * - TERMP_DANGLE: Do not break the output line at the right margin,
88: * append the next chunk after it even if this one is too long.
89: * To be used together with TERMP_NOBREAK.
90: * - TERMP_HANG: Like TERMP_DANGLE, and also suppress padding before
91: * the next chunk if this column is not full.
1.71 kristaps 92: */
93: void
94: term_flushln(struct termp *p)
1.53 kristaps 95: {
1.210 schwarze 96: size_t i; /* current input position in p->buf */
1.205 schwarze 97: int ntab; /* number of tabs to prepend */
1.114 kristaps 98: size_t vis; /* current visual position on output */
99: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 100: size_t vend; /* end of word visual position on output */
1.114 kristaps 101: size_t bp; /* visual right border position */
1.172 schwarze 102: size_t dv; /* temporary for visual pos calculations */
1.210 schwarze 103: size_t j; /* temporary loop index for p->buf */
104: size_t jhy; /* last hyph before overflow w/r/t j */
1.152 kristaps 105: size_t maxvis; /* output position of visible boundary */
1.53 kristaps 106:
1.71 kristaps 107: /*
108: * First, establish the maximum columns of "visible" content.
109: * This is usually the difference between the right-margin and
110: * an indentation, but can be, for tagged lists or columns, a
1.212 schwarze 111: * small set of values.
112: *
113: * The following unsigned-signed subtractions look strange,
114: * but they are actually correct. If the int p->overstep
115: * is negative, it gets sign extended. Subtracting that
116: * very large size_t effectively adds a small number to dv.
1.71 kristaps 117: */
1.240 schwarze 118: dv = p->rmargin > p->offset ? p->rmargin - p->offset : 0;
1.174 schwarze 119: maxvis = (int)dv > p->overstep ? dv - (size_t)p->overstep : 0;
1.92 kristaps 120:
1.236 schwarze 121: if (p->flags & TERMP_NOBREAK) {
122: dv = p->maxrmargin > p->offset ?
123: p->maxrmargin - p->offset : 0;
124: bp = (int)dv > p->overstep ?
125: dv - (size_t)p->overstep : 0;
126: } else
127: bp = maxvis;
1.115 kristaps 128:
1.136 schwarze 129: /*
1.200 schwarze 130: * Calculate the required amount of padding.
1.136 schwarze 131: */
1.200 schwarze 132: vbl = p->offset + p->overstep > p->viscol ?
133: p->offset + p->overstep - p->viscol : 0;
1.136 schwarze 134:
1.174 schwarze 135: vis = vend = 0;
136: i = 0;
1.115 kristaps 137:
1.188 kristaps 138: while (i < p->col) {
1.71 kristaps 139: /*
1.154 kristaps 140: * Handle literal tab characters: collapse all
141: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 142: */
1.205 schwarze 143: ntab = 0;
1.188 kristaps 144: while (i < p->col && '\t' == p->buf[i]) {
1.154 kristaps 145: vend = (vis / p->tabwidth + 1) * p->tabwidth;
1.138 schwarze 146: vbl += vend - vis;
147: vis = vend;
1.205 schwarze 148: ntab++;
1.169 schwarze 149: i++;
1.138 schwarze 150: }
151:
152: /*
1.71 kristaps 153: * Count up visible word characters. Control sequences
154: * (starting with the CSI) aren't counted. A space
155: * generates a non-printing word, which is valid (the
156: * space is printed according to regular spacing rules).
157: */
158:
1.188 kristaps 159: for (j = i, jhy = 0; j < p->col; j++) {
1.208 schwarze 160: if (' ' == p->buf[j] || '\t' == p->buf[j])
1.71 kristaps 161: break;
1.154 kristaps 162:
1.257 schwarze 163: /* Back over the last printed character. */
1.154 kristaps 164: if (8 == p->buf[j]) {
1.153 kristaps 165: assert(j);
166: vend -= (*p->width)(p, p->buf[j - 1]);
1.154 kristaps 167: continue;
1.153 kristaps 168: }
1.154 kristaps 169:
170: /* Regular word. */
171: /* Break at the hyphen point if we overrun. */
1.222 schwarze 172: if (vend > vis && vend < bp &&
1.216 schwarze 173: (ASCII_HYPH == p->buf[j] ||
174: ASCII_BREAK == p->buf[j]))
1.154 kristaps 175: jhy = j;
176:
1.217 schwarze 177: /*
178: * Hyphenation now decided, put back a real
179: * hyphen such that we get the correct width.
180: */
181: if (ASCII_HYPH == p->buf[j])
182: p->buf[j] = '-';
183:
1.154 kristaps 184: vend += (*p->width)(p, p->buf[j]);
1.71 kristaps 185: }
1.53 kristaps 186:
1.71 kristaps 187: /*
1.81 kristaps 188: * Find out whether we would exceed the right margin.
1.136 schwarze 189: * If so, break to the next line.
1.81 kristaps 190: */
1.140 kristaps 191: if (vend > bp && 0 == jhy && vis > 0) {
1.136 schwarze 192: vend -= vis;
1.146 kristaps 193: (*p->endline)(p);
1.201 schwarze 194: p->viscol = 0;
1.221 schwarze 195: if (TERMP_BRIND & p->flags) {
1.240 schwarze 196: vbl = p->rmargin;
197: vend += p->rmargin;
198: vend -= p->offset;
1.201 schwarze 199: } else
1.136 schwarze 200: vbl = p->offset;
1.205 schwarze 201:
202: /* use pending tabs on the new line */
203:
204: if (0 < ntab)
205: vbl += ntab * p->tabwidth;
1.130 kristaps 206:
1.212 schwarze 207: /*
208: * Remove the p->overstep width.
209: * Again, if p->overstep is negative,
210: * sign extension does the right thing.
211: */
1.130 kristaps 212:
1.174 schwarze 213: bp += (size_t)p->overstep;
1.129 kristaps 214: p->overstep = 0;
1.71 kristaps 215: }
1.138 schwarze 216:
1.130 kristaps 217: /* Write out the [remaining] word. */
1.188 kristaps 218: for ( ; i < p->col; i++) {
1.140 kristaps 219: if (vend > bp && jhy > 0 && i > jhy)
220: break;
1.138 schwarze 221: if ('\t' == p->buf[i])
222: break;
1.136 schwarze 223: if (' ' == p->buf[i]) {
1.164 kristaps 224: j = i;
1.228 kristaps 225: while (i < p->col && ' ' == p->buf[i])
1.136 schwarze 226: i++;
1.210 schwarze 227: dv = (i - j) * (*p->width)(p, ' ');
1.172 schwarze 228: vbl += dv;
229: vend += dv;
1.71 kristaps 230: break;
1.136 schwarze 231: }
232: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 233: vbl += (*p->width)(p, ' ');
1.136 schwarze 234: continue;
235: }
1.216 schwarze 236: if (ASCII_BREAK == p->buf[i])
237: continue;
1.130 kristaps 238:
1.136 schwarze 239: /*
240: * Now we definitely know there will be
241: * printable characters to output,
242: * so write preceding white space now.
243: */
244: if (vbl) {
1.146 kristaps 245: (*p->advance)(p, vbl);
1.139 schwarze 246: p->viscol += vbl;
1.136 schwarze 247: vbl = 0;
1.200 schwarze 248: }
249:
250: (*p->letter)(p, p->buf[i]);
251: if (8 == p->buf[i])
252: p->viscol -= (*p->width)(p, p->buf[i-1]);
1.222 schwarze 253: else
1.153 kristaps 254: p->viscol += (*p->width)(p, p->buf[i]);
1.136 schwarze 255: }
256: vis = vend;
1.71 kristaps 257: }
1.168 schwarze 258:
259: /*
260: * If there was trailing white space, it was not printed;
261: * so reset the cursor position accordingly.
262: */
1.235 schwarze 263: if (vis > vbl)
1.200 schwarze 264: vis -= vbl;
1.235 schwarze 265: else
266: vis = 0;
1.111 kristaps 267:
1.91 kristaps 268: p->col = 0;
1.129 kristaps 269: p->overstep = 0;
1.248 schwarze 270: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE);
1.15 kristaps 271:
1.91 kristaps 272: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 273: p->viscol = 0;
1.146 kristaps 274: (*p->endline)(p);
1.15 kristaps 275: return;
1.71 kristaps 276: }
1.15 kristaps 277:
1.91 kristaps 278: if (TERMP_HANG & p->flags) {
1.242 schwarze 279: p->overstep += (int)(p->offset + vis - p->rmargin +
1.222 schwarze 280: p->trailspace * (*p->width)(p, ' '));
1.91 kristaps 281:
282: /*
1.92 kristaps 283: * If we have overstepped the margin, temporarily move
284: * it to the right and flag the rest of the line to be
285: * shorter.
1.212 schwarze 286: * If there is a request to keep the columns together,
287: * allow negative overstep when the column is not full.
1.91 kristaps 288: */
1.212 schwarze 289: if (p->trailspace && p->overstep < 0)
1.129 kristaps 290: p->overstep = 0;
1.200 schwarze 291: return;
1.91 kristaps 292:
293: } else if (TERMP_DANGLE & p->flags)
294: return;
1.250 schwarze 295:
296: /* Trailing whitespace is significant in some columns. */
297: if (vis && vbl && (TERMP_BRTRSP & p->flags))
298: vis += vbl;
1.15 kristaps 299:
1.200 schwarze 300: /* If the column was overrun, break the line. */
1.211 schwarze 301: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.146 kristaps 302: (*p->endline)(p);
1.200 schwarze 303: p->viscol = 0;
1.91 kristaps 304: }
1.15 kristaps 305: }
306:
1.222 schwarze 307: /*
1.71 kristaps 308: * A newline only breaks an existing line; it won't assert vertical
309: * space. All data in the output buffer is flushed prior to the newline
310: * assertion.
311: */
312: void
313: term_newln(struct termp *p)
1.15 kristaps 314: {
315:
1.71 kristaps 316: p->flags |= TERMP_NOSPACE;
1.200 schwarze 317: if (p->col || p->viscol)
318: term_flushln(p);
1.16 kristaps 319: }
320:
1.71 kristaps 321: /*
322: * Asserts a vertical space (a full, empty line-break between lines).
323: * Note that if used twice, this will cause two blank spaces and so on.
324: * All data in the output buffer is flushed prior to the newline
325: * assertion.
326: */
327: void
328: term_vspace(struct termp *p)
1.16 kristaps 329: {
330:
1.62 kristaps 331: term_newln(p);
1.139 schwarze 332: p->viscol = 0;
1.202 schwarze 333: if (0 < p->skipvsp)
334: p->skipvsp--;
335: else
336: (*p->endline)(p);
1.16 kristaps 337: }
338:
1.238 schwarze 339: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 340: void
341: term_fontlast(struct termp *p)
342: {
343: enum termfont f;
344:
345: f = p->fontl;
346: p->fontl = p->fontq[p->fonti];
347: p->fontq[p->fonti] = f;
348: }
349:
1.238 schwarze 350: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 351: void
352: term_fontrepl(struct termp *p, enum termfont f)
353: {
354:
355: p->fontl = p->fontq[p->fonti];
356: p->fontq[p->fonti] = f;
357: }
358:
1.238 schwarze 359: /* Set font, save previous. */
1.125 kristaps 360: void
361: term_fontpush(struct termp *p, enum termfont f)
362: {
363:
364: p->fontl = p->fontq[p->fonti];
1.238 schwarze 365: if (++p->fonti == p->fontsz) {
366: p->fontsz += 8;
367: p->fontq = mandoc_reallocarray(p->fontq,
1.256 schwarze 368: p->fontsz, sizeof(*p->fontq));
1.238 schwarze 369: }
370: p->fontq[p->fonti] = f;
1.125 kristaps 371: }
372:
1.238 schwarze 373: /* Flush to make the saved pointer current again. */
1.125 kristaps 374: void
1.244 schwarze 375: term_fontpopq(struct termp *p, int i)
1.125 kristaps 376: {
377:
1.244 schwarze 378: assert(i >= 0);
379: if (p->fonti > i)
380: p->fonti = i;
1.125 kristaps 381: }
1.94 kristaps 382:
1.238 schwarze 383: /* Pop one font off the stack. */
1.125 kristaps 384: void
385: term_fontpop(struct termp *p)
386: {
387:
388: assert(p->fonti);
389: p->fonti--;
1.17 kristaps 390: }
391:
1.71 kristaps 392: /*
393: * Handle pwords, partial words, which may be either a single word or a
394: * phrase that cannot be broken down (such as a literal string). This
395: * handles word styling.
396: */
1.86 kristaps 397: void
398: term_word(struct termp *p, const char *word)
1.65 kristaps 399: {
1.214 schwarze 400: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 401: const char *seq, *cp;
1.194 kristaps 402: int sz, uc;
1.124 kristaps 403: size_t ssz;
1.184 kristaps 404: enum mandoc_esc esc;
1.100 kristaps 405:
1.133 kristaps 406: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 407: if ( ! (TERMP_KEEP & p->flags)) {
1.133 kristaps 408: bufferc(p, ' ');
1.151 schwarze 409: if (TERMP_SENTENCE & p->flags)
410: bufferc(p, ' ');
411: } else
412: bufferc(p, ASCII_NBRSP);
1.133 kristaps 413: }
1.207 schwarze 414: if (TERMP_PREKEEP & p->flags)
415: p->flags |= TERMP_KEEP;
1.65 kristaps 416:
1.71 kristaps 417: if ( ! (p->flags & TERMP_NONOSPACE))
418: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 419: else
420: p->flags |= TERMP_NOSPACE;
1.133 kristaps 421:
1.237 schwarze 422: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
1.245 schwarze 423: p->skipvsp = 0;
1.65 kristaps 424:
1.184 kristaps 425: while ('\0' != *word) {
1.203 schwarze 426: if ('\\' != *word) {
1.214 schwarze 427: if (TERMP_NBRWORD & p->flags) {
428: if (' ' == *word) {
429: encode(p, nbrsp, 1);
430: word++;
431: continue;
432: }
433: ssz = strcspn(word, "\\ ");
434: } else
435: ssz = strcspn(word, "\\");
1.162 kristaps 436: encode(p, word, ssz);
1.203 schwarze 437: word += (int)ssz;
1.124 kristaps 438: continue;
1.203 schwarze 439: }
1.124 kristaps 440:
1.184 kristaps 441: word++;
442: esc = mandoc_escape(&word, &seq, &sz);
443: if (ESCAPE_ERROR == esc)
1.224 schwarze 444: continue;
1.124 kristaps 445:
1.184 kristaps 446: switch (esc) {
1.222 schwarze 447: case ESCAPE_UNICODE:
1.229 schwarze 448: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 449: break;
1.222 schwarze 450: case ESCAPE_NUMBERED:
1.233 schwarze 451: uc = mchars_num2char(seq, sz);
452: if (uc < 0)
453: continue;
1.184 kristaps 454: break;
1.222 schwarze 455: case ESCAPE_SPECIAL:
1.229 schwarze 456: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 457: cp = mchars_spec2str(seq, sz, &ssz);
1.232 schwarze 458: if (cp != NULL)
1.229 schwarze 459: encode(p, cp, ssz);
460: } else {
1.254 schwarze 461: uc = mchars_spec2cp(seq, sz);
1.230 schwarze 462: if (uc > 0)
463: encode1(p, uc);
1.229 schwarze 464: }
1.233 schwarze 465: continue;
1.222 schwarze 466: case ESCAPE_FONTBOLD:
1.125 kristaps 467: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 468: continue;
1.222 schwarze 469: case ESCAPE_FONTITALIC:
1.125 kristaps 470: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 471: continue;
1.222 schwarze 472: case ESCAPE_FONTBI:
1.209 schwarze 473: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 474: continue;
1.222 schwarze 475: case ESCAPE_FONT:
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:
1.248 schwarze 483: if (p->flags & TERMP_BACKAFTER)
484: p->flags &= ~TERMP_BACKAFTER;
485: else if (*word == '\0')
1.237 schwarze 486: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.233 schwarze 487: continue;
1.222 schwarze 488: case ESCAPE_SKIPCHAR:
1.248 schwarze 489: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 490: continue;
1.243 schwarze 491: case ESCAPE_OVERSTRIKE:
492: cp = seq + sz;
493: while (seq < cp) {
494: if (*seq == '\\') {
495: mandoc_escape(&seq, NULL, NULL);
496: continue;
497: }
498: encode1(p, *seq++);
1.248 schwarze 499: if (seq < cp) {
500: if (p->flags & TERMP_BACKBEFORE)
501: p->flags |= TERMP_BACKAFTER;
502: else
503: p->flags |= TERMP_BACKBEFORE;
504: }
1.243 schwarze 505: }
1.249 schwarze 506: /* Trim trailing backspace/blank pair. */
1.258 schwarze 507: if (p->col > 2 &&
508: (p->buf[p->col - 1] == ' ' ||
509: p->buf[p->col - 1] == '\t'))
1.249 schwarze 510: p->col -= 2;
1.248 schwarze 511: continue;
1.124 kristaps 512: default:
1.233 schwarze 513: continue;
514: }
515:
516: /*
517: * Common handling for Unicode and numbered
518: * character escape sequences.
519: */
520:
521: if (p->enc == TERMENC_ASCII) {
522: cp = ascii_uc2str(uc);
523: encode(p, cp, strlen(cp));
524: } else {
525: if ((uc < 0x20 && uc != 0x09) ||
526: (uc > 0x7E && uc < 0xA0))
527: uc = 0xFFFD;
528: encode1(p, uc);
1.124 kristaps 529: }
530: }
1.214 schwarze 531: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 532: }
533:
1.71 kristaps 534: static void
1.210 schwarze 535: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 536: {
537:
1.125 kristaps 538: if (0 == p->maxcols)
539: p->maxcols = 1024;
540: while (sz >= p->maxcols)
541: p->maxcols <<= 2;
542:
1.223 schwarze 543: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.51 kristaps 544: }
545:
1.79 kristaps 546: static void
1.125 kristaps 547: bufferc(struct termp *p, char c)
548: {
549:
550: if (p->col + 1 >= p->maxcols)
551: adjbuf(p, p->col + 1);
552:
1.188 kristaps 553: p->buf[p->col++] = c;
1.125 kristaps 554: }
555:
1.194 kristaps 556: /*
557: * See encode().
558: * Do this for a single (probably unicode) value.
559: * Does not check for non-decorated glyphs.
560: */
561: static void
562: encode1(struct termp *p, int c)
563: {
564: enum termfont f;
565:
1.248 schwarze 566: if (p->col + 7 >= p->maxcols)
567: adjbuf(p, p->col + 7);
1.194 kristaps 568:
1.255 schwarze 569: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 570: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 571:
1.248 schwarze 572: if (p->flags & TERMP_BACKBEFORE) {
1.258 schwarze 573: if (p->buf[p->col - 1] == ' ' || p->buf[p->col - 1] == '\t')
1.249 schwarze 574: p->col--;
575: else
576: p->buf[p->col++] = 8;
1.248 schwarze 577: p->flags &= ~TERMP_BACKBEFORE;
578: }
1.209 schwarze 579: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.194 kristaps 580: p->buf[p->col++] = '_';
1.209 schwarze 581: p->buf[p->col++] = 8;
582: }
583: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
584: if (ASCII_HYPH == c)
585: p->buf[p->col++] = '-';
586: else
587: p->buf[p->col++] = c;
588: p->buf[p->col++] = 8;
589: }
1.194 kristaps 590: p->buf[p->col++] = c;
1.248 schwarze 591: if (p->flags & TERMP_BACKAFTER) {
592: p->flags |= TERMP_BACKBEFORE;
593: p->flags &= ~TERMP_BACKAFTER;
594: }
1.194 kristaps 595: }
596:
1.125 kristaps 597: static void
598: encode(struct termp *p, const char *word, size_t sz)
599: {
1.210 schwarze 600: size_t i;
1.188 kristaps 601:
1.248 schwarze 602: if (p->col + 2 + (sz * 5) >= p->maxcols)
603: adjbuf(p, p->col + 2 + (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]);
1.259 ! schwarze 609: else {
1.188 kristaps 610: p->buf[p->col++] = word[i];
1.259 ! schwarze 611:
! 612: /*
! 613: * Postpone the effect of \z while handling
! 614: * an overstrike sequence from ascii_uc2str().
! 615: */
! 616:
! 617: if (word[i] == '\b' &&
! 618: (p->flags & TERMP_BACKBEFORE)) {
! 619: p->flags &= ~TERMP_BACKBEFORE;
! 620: p->flags |= TERMP_BACKAFTER;
! 621: }
! 622: }
1.79 kristaps 623: }
1.219 schwarze 624: }
625:
626: void
627: term_setwidth(struct termp *p, const char *wstr)
628: {
629: struct roffsu su;
1.247 schwarze 630: int iop, width;
1.219 schwarze 631:
1.220 schwarze 632: iop = 0;
633: width = 0;
1.219 schwarze 634: if (NULL != wstr) {
635: switch (*wstr) {
1.222 schwarze 636: case '+':
1.219 schwarze 637: iop = 1;
638: wstr++;
639: break;
1.222 schwarze 640: case '-':
1.219 schwarze 641: iop = -1;
642: wstr++;
643: break;
644: default:
645: break;
646: }
1.220 schwarze 647: if (a2roffsu(wstr, &su, SCALE_MAX))
648: width = term_hspan(p, &su);
649: else
1.219 schwarze 650: iop = 0;
651: }
652: (*p->setwidth)(p, iop, width);
1.79 kristaps 653: }
1.106 kristaps 654:
1.107 kristaps 655: size_t
1.149 kristaps 656: term_len(const struct termp *p, size_t sz)
657: {
658:
1.252 schwarze 659: return (*p->width)(p, ' ') * sz;
1.149 kristaps 660: }
661:
1.203 schwarze 662: static size_t
663: cond_width(const struct termp *p, int c, int *skip)
664: {
665:
666: if (*skip) {
667: (*skip) = 0;
1.252 schwarze 668: return 0;
1.203 schwarze 669: } else
1.252 schwarze 670: return (*p->width)(p, c);
1.203 schwarze 671: }
1.149 kristaps 672:
673: size_t
674: term_strlen(const struct termp *p, const char *cp)
675: {
1.184 kristaps 676: size_t sz, rsz, i;
1.233 schwarze 677: int ssz, skip, uc;
1.171 kristaps 678: const char *seq, *rhs;
1.196 kristaps 679: enum mandoc_esc esc;
1.216 schwarze 680: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
681: ASCII_BREAK, '\0' };
1.171 kristaps 682:
1.184 kristaps 683: /*
684: * Account for escaped sequences within string length
685: * calculations. This follows the logic in term_word() as we
686: * must calculate the width of produced strings.
687: */
688:
689: sz = 0;
1.203 schwarze 690: skip = 0;
1.189 kristaps 691: while ('\0' != *cp) {
692: rsz = strcspn(cp, rej);
693: for (i = 0; i < rsz; i++)
1.203 schwarze 694: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 695:
1.184 kristaps 696: switch (*cp) {
1.222 schwarze 697: case '\\':
1.189 kristaps 698: cp++;
1.196 kristaps 699: esc = mandoc_escape(&cp, &seq, &ssz);
700: if (ESCAPE_ERROR == esc)
1.224 schwarze 701: continue;
1.196 kristaps 702:
703: rhs = NULL;
704:
705: switch (esc) {
1.222 schwarze 706: case ESCAPE_UNICODE:
1.234 schwarze 707: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 708: break;
1.222 schwarze 709: case ESCAPE_NUMBERED:
1.233 schwarze 710: uc = mchars_num2char(seq, ssz);
711: if (uc < 0)
712: continue;
1.171 kristaps 713: break;
1.222 schwarze 714: case ESCAPE_SPECIAL:
1.233 schwarze 715: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 716: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 717: if (rhs != NULL)
718: break;
719: } else {
1.254 schwarze 720: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 721: if (uc > 0)
722: sz += cond_width(p, uc, &skip);
1.229 schwarze 723: }
1.233 schwarze 724: continue;
1.222 schwarze 725: case ESCAPE_SKIPCHAR:
1.203 schwarze 726: skip = 1;
1.243 schwarze 727: continue;
728: case ESCAPE_OVERSTRIKE:
729: rsz = 0;
730: rhs = seq + ssz;
731: while (seq < rhs) {
732: if (*seq == '\\') {
733: mandoc_escape(&seq, NULL, NULL);
734: continue;
735: }
736: i = (*p->width)(p, *seq++);
737: if (rsz < i)
738: rsz = i;
739: }
740: sz += rsz;
1.233 schwarze 741: continue;
1.171 kristaps 742: default:
1.233 schwarze 743: continue;
1.171 kristaps 744: }
1.149 kristaps 745:
1.233 schwarze 746: /*
747: * Common handling for Unicode and numbered
748: * character escape sequences.
749: */
750:
751: if (rhs == NULL) {
752: if (p->enc == TERMENC_ASCII) {
753: rhs = ascii_uc2str(uc);
754: rsz = strlen(rhs);
755: } else {
756: if ((uc < 0x20 && uc != 0x09) ||
757: (uc > 0x7E && uc < 0xA0))
758: uc = 0xFFFD;
759: sz += cond_width(p, uc, &skip);
760: continue;
761: }
762: }
1.184 kristaps 763:
1.203 schwarze 764: if (skip) {
765: skip = 0;
766: break;
767: }
1.233 schwarze 768:
769: /*
770: * Common handling for all escape sequences
771: * printing more than one character.
772: */
1.203 schwarze 773:
1.184 kristaps 774: for (i = 0; i < rsz; i++)
775: sz += (*p->width)(p, *rhs++);
776: break;
1.222 schwarze 777: case ASCII_NBRSP:
1.203 schwarze 778: sz += cond_width(p, ' ', &skip);
1.176 kristaps 779: cp++;
1.184 kristaps 780: break;
1.222 schwarze 781: case ASCII_HYPH:
1.203 schwarze 782: sz += cond_width(p, '-', &skip);
1.176 kristaps 783: cp++;
1.184 kristaps 784: break;
785: default:
786: break;
787: }
1.189 kristaps 788: }
1.149 kristaps 789:
1.252 schwarze 790: return sz;
1.149 kristaps 791: }
792:
1.240 schwarze 793: int
1.149 kristaps 794: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 795: {
796: double r;
1.241 schwarze 797: int ri;
1.106 kristaps 798:
1.107 kristaps 799: switch (su->unit) {
1.239 schwarze 800: case SCALE_BU:
801: r = su->scale / 40.0;
802: break;
1.222 schwarze 803: case SCALE_CM:
1.239 schwarze 804: r = su->scale * 6.0 / 2.54;
805: break;
806: case SCALE_FS:
807: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 808: break;
1.222 schwarze 809: case SCALE_IN:
1.225 schwarze 810: r = su->scale * 6.0;
1.106 kristaps 811: break;
1.239 schwarze 812: case SCALE_MM:
813: r = su->scale * 0.006;
814: break;
1.222 schwarze 815: case SCALE_PC:
1.107 kristaps 816: r = su->scale;
1.106 kristaps 817: break;
1.222 schwarze 818: case SCALE_PT:
1.239 schwarze 819: r = su->scale / 12.0;
1.106 kristaps 820: break;
1.239 schwarze 821: case SCALE_EN:
822: case SCALE_EM:
823: r = su->scale * 0.6;
1.106 kristaps 824: break;
1.222 schwarze 825: case SCALE_VS:
1.107 kristaps 826: r = su->scale;
1.106 kristaps 827: break;
828: default:
1.239 schwarze 829: abort();
1.106 kristaps 830: }
1.241 schwarze 831: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 832: return ri < 66 ? ri : 1;
1.106 kristaps 833: }
834:
1.247 schwarze 835: /*
836: * Convert a scaling width to basic units, rounding down.
837: */
1.240 schwarze 838: int
1.149 kristaps 839: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 840: {
1.108 kristaps 841:
1.252 schwarze 842: return (*p->hspan)(p, su);
1.106 kristaps 843: }
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