Annotation of mandoc/term.c, Revision 1.260
1.260 ! schwarze 1: /* $Id: term.c,v 1.259 2017/01/08 18:16:58 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;
1.260 ! schwarze 144: while (i < p->col && p->buf[i] == '\t') {
! 145: vend = term_tab_next(vis);
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;
1.205 schwarze 195:
1.260 ! schwarze 196: /* Use pending tabs on the new line. */
! 197:
! 198: vbl = 0;
! 199: while (ntab--)
! 200: vbl = term_tab_next(vbl);
! 201:
! 202: /* Re-establish indentation. */
1.205 schwarze 203:
1.260 ! schwarze 204: if (p->flags & TERMP_BRIND) {
! 205: vbl += p->rmargin;
! 206: vend += p->rmargin - p->offset;
! 207: } else
! 208: vbl += p->offset;
1.130 kristaps 209:
1.212 schwarze 210: /*
211: * Remove the p->overstep width.
212: * Again, if p->overstep is negative,
213: * sign extension does the right thing.
214: */
1.130 kristaps 215:
1.174 schwarze 216: bp += (size_t)p->overstep;
1.129 kristaps 217: p->overstep = 0;
1.71 kristaps 218: }
1.138 schwarze 219:
1.130 kristaps 220: /* Write out the [remaining] word. */
1.188 kristaps 221: for ( ; i < p->col; i++) {
1.140 kristaps 222: if (vend > bp && jhy > 0 && i > jhy)
223: break;
1.138 schwarze 224: if ('\t' == p->buf[i])
225: break;
1.136 schwarze 226: if (' ' == p->buf[i]) {
1.164 kristaps 227: j = i;
1.228 kristaps 228: while (i < p->col && ' ' == p->buf[i])
1.136 schwarze 229: i++;
1.210 schwarze 230: dv = (i - j) * (*p->width)(p, ' ');
1.172 schwarze 231: vbl += dv;
232: vend += dv;
1.71 kristaps 233: break;
1.136 schwarze 234: }
235: if (ASCII_NBRSP == p->buf[i]) {
1.153 kristaps 236: vbl += (*p->width)(p, ' ');
1.136 schwarze 237: continue;
238: }
1.216 schwarze 239: if (ASCII_BREAK == p->buf[i])
240: continue;
1.130 kristaps 241:
1.136 schwarze 242: /*
243: * Now we definitely know there will be
244: * printable characters to output,
245: * so write preceding white space now.
246: */
247: if (vbl) {
1.146 kristaps 248: (*p->advance)(p, vbl);
1.139 schwarze 249: p->viscol += vbl;
1.136 schwarze 250: vbl = 0;
1.200 schwarze 251: }
252:
253: (*p->letter)(p, p->buf[i]);
254: if (8 == p->buf[i])
255: p->viscol -= (*p->width)(p, p->buf[i-1]);
1.222 schwarze 256: else
1.153 kristaps 257: p->viscol += (*p->width)(p, p->buf[i]);
1.136 schwarze 258: }
259: vis = vend;
1.71 kristaps 260: }
1.168 schwarze 261:
262: /*
263: * If there was trailing white space, it was not printed;
264: * so reset the cursor position accordingly.
265: */
1.235 schwarze 266: if (vis > vbl)
1.200 schwarze 267: vis -= vbl;
1.235 schwarze 268: else
269: vis = 0;
1.111 kristaps 270:
1.91 kristaps 271: p->col = 0;
1.129 kristaps 272: p->overstep = 0;
1.248 schwarze 273: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE);
1.15 kristaps 274:
1.91 kristaps 275: if ( ! (TERMP_NOBREAK & p->flags)) {
1.139 schwarze 276: p->viscol = 0;
1.146 kristaps 277: (*p->endline)(p);
1.15 kristaps 278: return;
1.71 kristaps 279: }
1.15 kristaps 280:
1.91 kristaps 281: if (TERMP_HANG & p->flags) {
1.242 schwarze 282: p->overstep += (int)(p->offset + vis - p->rmargin +
1.222 schwarze 283: p->trailspace * (*p->width)(p, ' '));
1.91 kristaps 284:
285: /*
1.92 kristaps 286: * If we have overstepped the margin, temporarily move
287: * it to the right and flag the rest of the line to be
288: * shorter.
1.212 schwarze 289: * If there is a request to keep the columns together,
290: * allow negative overstep when the column is not full.
1.91 kristaps 291: */
1.212 schwarze 292: if (p->trailspace && p->overstep < 0)
1.129 kristaps 293: p->overstep = 0;
1.200 schwarze 294: return;
1.91 kristaps 295:
296: } else if (TERMP_DANGLE & p->flags)
297: return;
1.250 schwarze 298:
299: /* Trailing whitespace is significant in some columns. */
300: if (vis && vbl && (TERMP_BRTRSP & p->flags))
301: vis += vbl;
1.15 kristaps 302:
1.200 schwarze 303: /* If the column was overrun, break the line. */
1.211 schwarze 304: if (maxvis < vis + p->trailspace * (*p->width)(p, ' ')) {
1.146 kristaps 305: (*p->endline)(p);
1.200 schwarze 306: p->viscol = 0;
1.91 kristaps 307: }
1.15 kristaps 308: }
309:
1.222 schwarze 310: /*
1.71 kristaps 311: * A newline only breaks an existing line; it won't assert vertical
312: * space. All data in the output buffer is flushed prior to the newline
313: * assertion.
314: */
315: void
316: term_newln(struct termp *p)
1.15 kristaps 317: {
318:
1.71 kristaps 319: p->flags |= TERMP_NOSPACE;
1.200 schwarze 320: if (p->col || p->viscol)
321: term_flushln(p);
1.16 kristaps 322: }
323:
1.71 kristaps 324: /*
325: * Asserts a vertical space (a full, empty line-break between lines).
326: * Note that if used twice, this will cause two blank spaces and so on.
327: * All data in the output buffer is flushed prior to the newline
328: * assertion.
329: */
330: void
331: term_vspace(struct termp *p)
1.16 kristaps 332: {
333:
1.62 kristaps 334: term_newln(p);
1.139 schwarze 335: p->viscol = 0;
1.202 schwarze 336: if (0 < p->skipvsp)
337: p->skipvsp--;
338: else
339: (*p->endline)(p);
1.16 kristaps 340: }
341:
1.238 schwarze 342: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 343: void
344: term_fontlast(struct termp *p)
345: {
346: enum termfont f;
347:
348: f = p->fontl;
349: p->fontl = p->fontq[p->fonti];
350: p->fontq[p->fonti] = f;
351: }
352:
1.238 schwarze 353: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 354: void
355: term_fontrepl(struct termp *p, enum termfont f)
356: {
357:
358: p->fontl = p->fontq[p->fonti];
359: p->fontq[p->fonti] = f;
360: }
361:
1.238 schwarze 362: /* Set font, save previous. */
1.125 kristaps 363: void
364: term_fontpush(struct termp *p, enum termfont f)
365: {
366:
367: p->fontl = p->fontq[p->fonti];
1.238 schwarze 368: if (++p->fonti == p->fontsz) {
369: p->fontsz += 8;
370: p->fontq = mandoc_reallocarray(p->fontq,
1.256 schwarze 371: p->fontsz, sizeof(*p->fontq));
1.238 schwarze 372: }
373: p->fontq[p->fonti] = f;
1.125 kristaps 374: }
375:
1.238 schwarze 376: /* Flush to make the saved pointer current again. */
1.125 kristaps 377: void
1.244 schwarze 378: term_fontpopq(struct termp *p, int i)
1.125 kristaps 379: {
380:
1.244 schwarze 381: assert(i >= 0);
382: if (p->fonti > i)
383: p->fonti = i;
1.125 kristaps 384: }
1.94 kristaps 385:
1.238 schwarze 386: /* Pop one font off the stack. */
1.125 kristaps 387: void
388: term_fontpop(struct termp *p)
389: {
390:
391: assert(p->fonti);
392: p->fonti--;
1.17 kristaps 393: }
394:
1.71 kristaps 395: /*
396: * Handle pwords, partial words, which may be either a single word or a
397: * phrase that cannot be broken down (such as a literal string). This
398: * handles word styling.
399: */
1.86 kristaps 400: void
401: term_word(struct termp *p, const char *word)
1.65 kristaps 402: {
1.214 schwarze 403: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 404: const char *seq, *cp;
1.194 kristaps 405: int sz, uc;
1.124 kristaps 406: size_t ssz;
1.184 kristaps 407: enum mandoc_esc esc;
1.100 kristaps 408:
1.133 kristaps 409: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 410: if ( ! (TERMP_KEEP & p->flags)) {
1.133 kristaps 411: bufferc(p, ' ');
1.151 schwarze 412: if (TERMP_SENTENCE & p->flags)
413: bufferc(p, ' ');
414: } else
415: bufferc(p, ASCII_NBRSP);
1.133 kristaps 416: }
1.207 schwarze 417: if (TERMP_PREKEEP & p->flags)
418: p->flags |= TERMP_KEEP;
1.65 kristaps 419:
1.71 kristaps 420: if ( ! (p->flags & TERMP_NONOSPACE))
421: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 422: else
423: p->flags |= TERMP_NOSPACE;
1.133 kristaps 424:
1.237 schwarze 425: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
1.245 schwarze 426: p->skipvsp = 0;
1.65 kristaps 427:
1.184 kristaps 428: while ('\0' != *word) {
1.203 schwarze 429: if ('\\' != *word) {
1.214 schwarze 430: if (TERMP_NBRWORD & p->flags) {
431: if (' ' == *word) {
432: encode(p, nbrsp, 1);
433: word++;
434: continue;
435: }
436: ssz = strcspn(word, "\\ ");
437: } else
438: ssz = strcspn(word, "\\");
1.162 kristaps 439: encode(p, word, ssz);
1.203 schwarze 440: word += (int)ssz;
1.124 kristaps 441: continue;
1.203 schwarze 442: }
1.124 kristaps 443:
1.184 kristaps 444: word++;
445: esc = mandoc_escape(&word, &seq, &sz);
446: if (ESCAPE_ERROR == esc)
1.224 schwarze 447: continue;
1.124 kristaps 448:
1.184 kristaps 449: switch (esc) {
1.222 schwarze 450: case ESCAPE_UNICODE:
1.229 schwarze 451: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 452: break;
1.222 schwarze 453: case ESCAPE_NUMBERED:
1.233 schwarze 454: uc = mchars_num2char(seq, sz);
455: if (uc < 0)
456: continue;
1.184 kristaps 457: break;
1.222 schwarze 458: case ESCAPE_SPECIAL:
1.229 schwarze 459: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 460: cp = mchars_spec2str(seq, sz, &ssz);
1.232 schwarze 461: if (cp != NULL)
1.229 schwarze 462: encode(p, cp, ssz);
463: } else {
1.254 schwarze 464: uc = mchars_spec2cp(seq, sz);
1.230 schwarze 465: if (uc > 0)
466: encode1(p, uc);
1.229 schwarze 467: }
1.233 schwarze 468: continue;
1.222 schwarze 469: case ESCAPE_FONTBOLD:
1.125 kristaps 470: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 471: continue;
1.222 schwarze 472: case ESCAPE_FONTITALIC:
1.125 kristaps 473: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 474: continue;
1.222 schwarze 475: case ESCAPE_FONTBI:
1.209 schwarze 476: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 477: continue;
1.222 schwarze 478: case ESCAPE_FONT:
479: case ESCAPE_FONTROMAN:
1.125 kristaps 480: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 481: continue;
1.222 schwarze 482: case ESCAPE_FONTPREV:
1.125 kristaps 483: term_fontlast(p);
1.233 schwarze 484: continue;
1.222 schwarze 485: case ESCAPE_NOSPACE:
1.248 schwarze 486: if (p->flags & TERMP_BACKAFTER)
487: p->flags &= ~TERMP_BACKAFTER;
488: else if (*word == '\0')
1.237 schwarze 489: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.233 schwarze 490: continue;
1.222 schwarze 491: case ESCAPE_SKIPCHAR:
1.248 schwarze 492: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 493: continue;
1.243 schwarze 494: case ESCAPE_OVERSTRIKE:
495: cp = seq + sz;
496: while (seq < cp) {
497: if (*seq == '\\') {
498: mandoc_escape(&seq, NULL, NULL);
499: continue;
500: }
501: encode1(p, *seq++);
1.248 schwarze 502: if (seq < cp) {
503: if (p->flags & TERMP_BACKBEFORE)
504: p->flags |= TERMP_BACKAFTER;
505: else
506: p->flags |= TERMP_BACKBEFORE;
507: }
1.243 schwarze 508: }
1.249 schwarze 509: /* Trim trailing backspace/blank pair. */
1.258 schwarze 510: if (p->col > 2 &&
511: (p->buf[p->col - 1] == ' ' ||
512: p->buf[p->col - 1] == '\t'))
1.249 schwarze 513: p->col -= 2;
1.248 schwarze 514: continue;
1.124 kristaps 515: default:
1.233 schwarze 516: continue;
517: }
518:
519: /*
520: * Common handling for Unicode and numbered
521: * character escape sequences.
522: */
523:
524: if (p->enc == TERMENC_ASCII) {
525: cp = ascii_uc2str(uc);
526: encode(p, cp, strlen(cp));
527: } else {
528: if ((uc < 0x20 && uc != 0x09) ||
529: (uc > 0x7E && uc < 0xA0))
530: uc = 0xFFFD;
531: encode1(p, uc);
1.124 kristaps 532: }
533: }
1.214 schwarze 534: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 535: }
536:
1.71 kristaps 537: static void
1.210 schwarze 538: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 539: {
540:
1.125 kristaps 541: if (0 == p->maxcols)
542: p->maxcols = 1024;
543: while (sz >= p->maxcols)
544: p->maxcols <<= 2;
545:
1.223 schwarze 546: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.51 kristaps 547: }
548:
1.79 kristaps 549: static void
1.125 kristaps 550: bufferc(struct termp *p, char c)
551: {
552:
553: if (p->col + 1 >= p->maxcols)
554: adjbuf(p, p->col + 1);
555:
1.188 kristaps 556: p->buf[p->col++] = c;
1.125 kristaps 557: }
558:
1.194 kristaps 559: /*
560: * See encode().
561: * Do this for a single (probably unicode) value.
562: * Does not check for non-decorated glyphs.
563: */
564: static void
565: encode1(struct termp *p, int c)
566: {
567: enum termfont f;
568:
1.248 schwarze 569: if (p->col + 7 >= p->maxcols)
570: adjbuf(p, p->col + 7);
1.194 kristaps 571:
1.255 schwarze 572: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 573: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 574:
1.248 schwarze 575: if (p->flags & TERMP_BACKBEFORE) {
1.258 schwarze 576: if (p->buf[p->col - 1] == ' ' || p->buf[p->col - 1] == '\t')
1.249 schwarze 577: p->col--;
578: else
579: p->buf[p->col++] = 8;
1.248 schwarze 580: p->flags &= ~TERMP_BACKBEFORE;
581: }
1.209 schwarze 582: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.194 kristaps 583: p->buf[p->col++] = '_';
1.209 schwarze 584: p->buf[p->col++] = 8;
585: }
586: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
587: if (ASCII_HYPH == c)
588: p->buf[p->col++] = '-';
589: else
590: p->buf[p->col++] = c;
591: p->buf[p->col++] = 8;
592: }
1.194 kristaps 593: p->buf[p->col++] = c;
1.248 schwarze 594: if (p->flags & TERMP_BACKAFTER) {
595: p->flags |= TERMP_BACKBEFORE;
596: p->flags &= ~TERMP_BACKAFTER;
597: }
1.194 kristaps 598: }
599:
1.125 kristaps 600: static void
601: encode(struct termp *p, const char *word, size_t sz)
602: {
1.210 schwarze 603: size_t i;
1.188 kristaps 604:
1.248 schwarze 605: if (p->col + 2 + (sz * 5) >= p->maxcols)
606: adjbuf(p, p->col + 2 + (sz * 5));
1.165 kristaps 607:
1.210 schwarze 608: for (i = 0; i < sz; i++) {
1.209 schwarze 609: if (ASCII_HYPH == word[i] ||
610: isgraph((unsigned char)word[i]))
611: encode1(p, word[i]);
1.259 schwarze 612: else {
1.188 kristaps 613: p->buf[p->col++] = word[i];
1.259 schwarze 614:
615: /*
616: * Postpone the effect of \z while handling
617: * an overstrike sequence from ascii_uc2str().
618: */
619:
620: if (word[i] == '\b' &&
621: (p->flags & TERMP_BACKBEFORE)) {
622: p->flags &= ~TERMP_BACKBEFORE;
623: p->flags |= TERMP_BACKAFTER;
624: }
625: }
1.79 kristaps 626: }
1.219 schwarze 627: }
628:
629: void
630: term_setwidth(struct termp *p, const char *wstr)
631: {
632: struct roffsu su;
1.247 schwarze 633: int iop, width;
1.219 schwarze 634:
1.220 schwarze 635: iop = 0;
636: width = 0;
1.219 schwarze 637: if (NULL != wstr) {
638: switch (*wstr) {
1.222 schwarze 639: case '+':
1.219 schwarze 640: iop = 1;
641: wstr++;
642: break;
1.222 schwarze 643: case '-':
1.219 schwarze 644: iop = -1;
645: wstr++;
646: break;
647: default:
648: break;
649: }
1.220 schwarze 650: if (a2roffsu(wstr, &su, SCALE_MAX))
651: width = term_hspan(p, &su);
652: else
1.219 schwarze 653: iop = 0;
654: }
655: (*p->setwidth)(p, iop, width);
1.79 kristaps 656: }
1.106 kristaps 657:
1.107 kristaps 658: size_t
1.149 kristaps 659: term_len(const struct termp *p, size_t sz)
660: {
661:
1.252 schwarze 662: return (*p->width)(p, ' ') * sz;
1.149 kristaps 663: }
664:
1.203 schwarze 665: static size_t
666: cond_width(const struct termp *p, int c, int *skip)
667: {
668:
669: if (*skip) {
670: (*skip) = 0;
1.252 schwarze 671: return 0;
1.203 schwarze 672: } else
1.252 schwarze 673: return (*p->width)(p, c);
1.203 schwarze 674: }
1.149 kristaps 675:
676: size_t
677: term_strlen(const struct termp *p, const char *cp)
678: {
1.184 kristaps 679: size_t sz, rsz, i;
1.233 schwarze 680: int ssz, skip, uc;
1.171 kristaps 681: const char *seq, *rhs;
1.196 kristaps 682: enum mandoc_esc esc;
1.216 schwarze 683: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
684: ASCII_BREAK, '\0' };
1.171 kristaps 685:
1.184 kristaps 686: /*
687: * Account for escaped sequences within string length
688: * calculations. This follows the logic in term_word() as we
689: * must calculate the width of produced strings.
690: */
691:
692: sz = 0;
1.203 schwarze 693: skip = 0;
1.189 kristaps 694: while ('\0' != *cp) {
695: rsz = strcspn(cp, rej);
696: for (i = 0; i < rsz; i++)
1.203 schwarze 697: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 698:
1.184 kristaps 699: switch (*cp) {
1.222 schwarze 700: case '\\':
1.189 kristaps 701: cp++;
1.196 kristaps 702: esc = mandoc_escape(&cp, &seq, &ssz);
703: if (ESCAPE_ERROR == esc)
1.224 schwarze 704: continue;
1.196 kristaps 705:
706: rhs = NULL;
707:
708: switch (esc) {
1.222 schwarze 709: case ESCAPE_UNICODE:
1.234 schwarze 710: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 711: break;
1.222 schwarze 712: case ESCAPE_NUMBERED:
1.233 schwarze 713: uc = mchars_num2char(seq, ssz);
714: if (uc < 0)
715: continue;
1.171 kristaps 716: break;
1.222 schwarze 717: case ESCAPE_SPECIAL:
1.233 schwarze 718: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 719: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 720: if (rhs != NULL)
721: break;
722: } else {
1.254 schwarze 723: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 724: if (uc > 0)
725: sz += cond_width(p, uc, &skip);
1.229 schwarze 726: }
1.233 schwarze 727: continue;
1.222 schwarze 728: case ESCAPE_SKIPCHAR:
1.203 schwarze 729: skip = 1;
1.243 schwarze 730: continue;
731: case ESCAPE_OVERSTRIKE:
732: rsz = 0;
733: rhs = seq + ssz;
734: while (seq < rhs) {
735: if (*seq == '\\') {
736: mandoc_escape(&seq, NULL, NULL);
737: continue;
738: }
739: i = (*p->width)(p, *seq++);
740: if (rsz < i)
741: rsz = i;
742: }
743: sz += rsz;
1.233 schwarze 744: continue;
1.171 kristaps 745: default:
1.233 schwarze 746: continue;
1.171 kristaps 747: }
1.149 kristaps 748:
1.233 schwarze 749: /*
750: * Common handling for Unicode and numbered
751: * character escape sequences.
752: */
753:
754: if (rhs == NULL) {
755: if (p->enc == TERMENC_ASCII) {
756: rhs = ascii_uc2str(uc);
757: rsz = strlen(rhs);
758: } else {
759: if ((uc < 0x20 && uc != 0x09) ||
760: (uc > 0x7E && uc < 0xA0))
761: uc = 0xFFFD;
762: sz += cond_width(p, uc, &skip);
763: continue;
764: }
765: }
1.184 kristaps 766:
1.203 schwarze 767: if (skip) {
768: skip = 0;
769: break;
770: }
1.233 schwarze 771:
772: /*
773: * Common handling for all escape sequences
774: * printing more than one character.
775: */
1.203 schwarze 776:
1.184 kristaps 777: for (i = 0; i < rsz; i++)
778: sz += (*p->width)(p, *rhs++);
779: break;
1.222 schwarze 780: case ASCII_NBRSP:
1.203 schwarze 781: sz += cond_width(p, ' ', &skip);
1.176 kristaps 782: cp++;
1.184 kristaps 783: break;
1.222 schwarze 784: case ASCII_HYPH:
1.203 schwarze 785: sz += cond_width(p, '-', &skip);
1.176 kristaps 786: cp++;
1.184 kristaps 787: break;
788: default:
789: break;
790: }
1.189 kristaps 791: }
1.149 kristaps 792:
1.252 schwarze 793: return sz;
1.149 kristaps 794: }
795:
1.240 schwarze 796: int
1.149 kristaps 797: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 798: {
799: double r;
1.241 schwarze 800: int ri;
1.106 kristaps 801:
1.107 kristaps 802: switch (su->unit) {
1.239 schwarze 803: case SCALE_BU:
804: r = su->scale / 40.0;
805: break;
1.222 schwarze 806: case SCALE_CM:
1.239 schwarze 807: r = su->scale * 6.0 / 2.54;
808: break;
809: case SCALE_FS:
810: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 811: break;
1.222 schwarze 812: case SCALE_IN:
1.225 schwarze 813: r = su->scale * 6.0;
1.106 kristaps 814: break;
1.239 schwarze 815: case SCALE_MM:
816: r = su->scale * 0.006;
817: break;
1.222 schwarze 818: case SCALE_PC:
1.107 kristaps 819: r = su->scale;
1.106 kristaps 820: break;
1.222 schwarze 821: case SCALE_PT:
1.239 schwarze 822: r = su->scale / 12.0;
1.106 kristaps 823: break;
1.239 schwarze 824: case SCALE_EN:
825: case SCALE_EM:
826: r = su->scale * 0.6;
1.106 kristaps 827: break;
1.222 schwarze 828: case SCALE_VS:
1.107 kristaps 829: r = su->scale;
1.106 kristaps 830: break;
831: default:
1.239 schwarze 832: abort();
1.106 kristaps 833: }
1.241 schwarze 834: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 835: return ri < 66 ? ri : 1;
1.106 kristaps 836: }
837:
1.247 schwarze 838: /*
839: * Convert a scaling width to basic units, rounding down.
840: */
1.240 schwarze 841: int
1.149 kristaps 842: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 843: {
1.108 kristaps 844:
1.252 schwarze 845: return (*p->hspan)(p, su);
1.106 kristaps 846: }
CVSweb
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to term.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [cvsweb.bsd.lv] / mandoc