Annotation of mandoc/term.c, Revision 1.262
1.262 ! schwarze 1: /* $Id: term.c,v 1.261 2017/06/01 19:05:37 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: {
1.261 schwarze 403: struct roffsu su;
1.214 schwarze 404: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 405: const char *seq, *cp;
1.194 kristaps 406: int sz, uc;
1.262 ! schwarze 407: size_t csz, lsz, ssz;
1.184 kristaps 408: enum mandoc_esc esc;
1.100 kristaps 409:
1.133 kristaps 410: if ( ! (TERMP_NOSPACE & p->flags)) {
1.151 schwarze 411: if ( ! (TERMP_KEEP & p->flags)) {
1.133 kristaps 412: bufferc(p, ' ');
1.151 schwarze 413: if (TERMP_SENTENCE & p->flags)
414: bufferc(p, ' ');
415: } else
416: bufferc(p, ASCII_NBRSP);
1.133 kristaps 417: }
1.207 schwarze 418: if (TERMP_PREKEEP & p->flags)
419: p->flags |= TERMP_KEEP;
1.65 kristaps 420:
1.71 kristaps 421: if ( ! (p->flags & TERMP_NONOSPACE))
422: p->flags &= ~TERMP_NOSPACE;
1.166 kristaps 423: else
424: p->flags |= TERMP_NOSPACE;
1.133 kristaps 425:
1.237 schwarze 426: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
1.245 schwarze 427: p->skipvsp = 0;
1.65 kristaps 428:
1.184 kristaps 429: while ('\0' != *word) {
1.203 schwarze 430: if ('\\' != *word) {
1.214 schwarze 431: if (TERMP_NBRWORD & p->flags) {
432: if (' ' == *word) {
433: encode(p, nbrsp, 1);
434: word++;
435: continue;
436: }
437: ssz = strcspn(word, "\\ ");
438: } else
439: ssz = strcspn(word, "\\");
1.162 kristaps 440: encode(p, word, ssz);
1.203 schwarze 441: word += (int)ssz;
1.124 kristaps 442: continue;
1.203 schwarze 443: }
1.124 kristaps 444:
1.184 kristaps 445: word++;
446: esc = mandoc_escape(&word, &seq, &sz);
447: if (ESCAPE_ERROR == esc)
1.224 schwarze 448: continue;
1.124 kristaps 449:
1.184 kristaps 450: switch (esc) {
1.222 schwarze 451: case ESCAPE_UNICODE:
1.229 schwarze 452: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 453: break;
1.222 schwarze 454: case ESCAPE_NUMBERED:
1.233 schwarze 455: uc = mchars_num2char(seq, sz);
456: if (uc < 0)
457: continue;
1.184 kristaps 458: break;
1.222 schwarze 459: case ESCAPE_SPECIAL:
1.229 schwarze 460: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 461: cp = mchars_spec2str(seq, sz, &ssz);
1.232 schwarze 462: if (cp != NULL)
1.229 schwarze 463: encode(p, cp, ssz);
464: } else {
1.254 schwarze 465: uc = mchars_spec2cp(seq, sz);
1.230 schwarze 466: if (uc > 0)
467: encode1(p, uc);
1.229 schwarze 468: }
1.233 schwarze 469: continue;
1.222 schwarze 470: case ESCAPE_FONTBOLD:
1.125 kristaps 471: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 472: continue;
1.222 schwarze 473: case ESCAPE_FONTITALIC:
1.125 kristaps 474: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 475: continue;
1.222 schwarze 476: case ESCAPE_FONTBI:
1.209 schwarze 477: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 478: continue;
1.222 schwarze 479: case ESCAPE_FONT:
480: case ESCAPE_FONTROMAN:
1.125 kristaps 481: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 482: continue;
1.222 schwarze 483: case ESCAPE_FONTPREV:
1.125 kristaps 484: term_fontlast(p);
1.233 schwarze 485: continue;
1.222 schwarze 486: case ESCAPE_NOSPACE:
1.248 schwarze 487: if (p->flags & TERMP_BACKAFTER)
488: p->flags &= ~TERMP_BACKAFTER;
489: else if (*word == '\0')
1.237 schwarze 490: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.261 schwarze 491: continue;
492: case ESCAPE_HORIZ:
493: if (a2roffsu(seq, &su, SCALE_EM) == 0)
494: continue;
495: uc = term_hspan(p, &su) / 24;
496: if (uc > 0)
497: while (uc-- > 0)
498: bufferc(p, ASCII_NBRSP);
499: else if (p->col > (size_t)(-uc))
500: p->col += uc;
501: else {
502: uc += p->col;
503: p->col = 0;
504: if (p->offset > (size_t)(-uc)) {
505: p->ti += uc;
506: p->offset += uc;
507: } else {
508: p->ti -= p->offset;
509: p->offset = 0;
510: }
1.262 ! schwarze 511: }
! 512: continue;
! 513: case ESCAPE_HLINE:
! 514: if (a2roffsu(seq, &su, SCALE_EM) == 0)
! 515: continue;
! 516: uc = term_hspan(p, &su) / 24;
! 517: if (uc <= 0) {
! 518: if (p->rmargin <= p->offset)
! 519: continue;
! 520: lsz = p->rmargin - p->offset;
! 521: } else
! 522: lsz = uc;
! 523: while (sz &&
! 524: strchr(" %&()*+-./0123456789:<=>", *seq)) {
! 525: seq++;
! 526: sz--;
! 527: }
! 528: if (sz && strchr("cifMmnPpuv", *seq)) {
! 529: seq++;
! 530: sz--;
! 531: }
! 532: if (sz == 0)
! 533: uc = -1;
! 534: else if (*seq == '\\') {
! 535: seq++;
! 536: esc = mandoc_escape(&seq, &cp, &sz);
! 537: switch (esc) {
! 538: case ESCAPE_UNICODE:
! 539: uc = mchars_num2uc(cp + 1, sz - 1);
! 540: break;
! 541: case ESCAPE_NUMBERED:
! 542: uc = mchars_num2char(cp, sz);
! 543: break;
! 544: case ESCAPE_SPECIAL:
! 545: uc = mchars_spec2cp(cp, sz);
! 546: break;
! 547: default:
! 548: uc = -1;
! 549: break;
! 550: }
! 551: } else
! 552: uc = *seq;
! 553: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
! 554: uc = '_';
! 555: if (p->enc == TERMENC_ASCII) {
! 556: cp = ascii_uc2str(uc);
! 557: csz = term_strlen(p, cp);
! 558: ssz = strlen(cp);
! 559: } else
! 560: csz = (*p->width)(p, uc);
! 561: while (lsz >= csz) {
! 562: if (p->enc == TERMENC_ASCII)
! 563: encode(p, cp, ssz);
! 564: else
! 565: encode1(p, uc);
! 566: lsz -= csz;
1.261 schwarze 567: }
1.233 schwarze 568: continue;
1.222 schwarze 569: case ESCAPE_SKIPCHAR:
1.248 schwarze 570: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 571: continue;
1.243 schwarze 572: case ESCAPE_OVERSTRIKE:
573: cp = seq + sz;
574: while (seq < cp) {
575: if (*seq == '\\') {
576: mandoc_escape(&seq, NULL, NULL);
577: continue;
578: }
579: encode1(p, *seq++);
1.248 schwarze 580: if (seq < cp) {
581: if (p->flags & TERMP_BACKBEFORE)
582: p->flags |= TERMP_BACKAFTER;
583: else
584: p->flags |= TERMP_BACKBEFORE;
585: }
1.243 schwarze 586: }
1.249 schwarze 587: /* Trim trailing backspace/blank pair. */
1.258 schwarze 588: if (p->col > 2 &&
589: (p->buf[p->col - 1] == ' ' ||
590: p->buf[p->col - 1] == '\t'))
1.249 schwarze 591: p->col -= 2;
1.248 schwarze 592: continue;
1.124 kristaps 593: default:
1.233 schwarze 594: continue;
595: }
596:
597: /*
598: * Common handling for Unicode and numbered
599: * character escape sequences.
600: */
601:
602: if (p->enc == TERMENC_ASCII) {
603: cp = ascii_uc2str(uc);
604: encode(p, cp, strlen(cp));
605: } else {
606: if ((uc < 0x20 && uc != 0x09) ||
607: (uc > 0x7E && uc < 0xA0))
608: uc = 0xFFFD;
609: encode1(p, uc);
1.124 kristaps 610: }
611: }
1.214 schwarze 612: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 613: }
614:
1.71 kristaps 615: static void
1.210 schwarze 616: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 617: {
618:
1.125 kristaps 619: if (0 == p->maxcols)
620: p->maxcols = 1024;
621: while (sz >= p->maxcols)
622: p->maxcols <<= 2;
623:
1.223 schwarze 624: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.51 kristaps 625: }
626:
1.79 kristaps 627: static void
1.125 kristaps 628: bufferc(struct termp *p, char c)
629: {
630:
631: if (p->col + 1 >= p->maxcols)
632: adjbuf(p, p->col + 1);
633:
1.188 kristaps 634: p->buf[p->col++] = c;
1.125 kristaps 635: }
636:
1.194 kristaps 637: /*
638: * See encode().
639: * Do this for a single (probably unicode) value.
640: * Does not check for non-decorated glyphs.
641: */
642: static void
643: encode1(struct termp *p, int c)
644: {
645: enum termfont f;
646:
1.248 schwarze 647: if (p->col + 7 >= p->maxcols)
648: adjbuf(p, p->col + 7);
1.194 kristaps 649:
1.255 schwarze 650: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 651: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 652:
1.248 schwarze 653: if (p->flags & TERMP_BACKBEFORE) {
1.258 schwarze 654: if (p->buf[p->col - 1] == ' ' || p->buf[p->col - 1] == '\t')
1.249 schwarze 655: p->col--;
656: else
657: p->buf[p->col++] = 8;
1.248 schwarze 658: p->flags &= ~TERMP_BACKBEFORE;
659: }
1.209 schwarze 660: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.194 kristaps 661: p->buf[p->col++] = '_';
1.209 schwarze 662: p->buf[p->col++] = 8;
663: }
664: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
665: if (ASCII_HYPH == c)
666: p->buf[p->col++] = '-';
667: else
668: p->buf[p->col++] = c;
669: p->buf[p->col++] = 8;
670: }
1.194 kristaps 671: p->buf[p->col++] = c;
1.248 schwarze 672: if (p->flags & TERMP_BACKAFTER) {
673: p->flags |= TERMP_BACKBEFORE;
674: p->flags &= ~TERMP_BACKAFTER;
675: }
1.194 kristaps 676: }
677:
1.125 kristaps 678: static void
679: encode(struct termp *p, const char *word, size_t sz)
680: {
1.210 schwarze 681: size_t i;
1.188 kristaps 682:
1.248 schwarze 683: if (p->col + 2 + (sz * 5) >= p->maxcols)
684: adjbuf(p, p->col + 2 + (sz * 5));
1.165 kristaps 685:
1.210 schwarze 686: for (i = 0; i < sz; i++) {
1.209 schwarze 687: if (ASCII_HYPH == word[i] ||
688: isgraph((unsigned char)word[i]))
689: encode1(p, word[i]);
1.259 schwarze 690: else {
1.188 kristaps 691: p->buf[p->col++] = word[i];
1.259 schwarze 692:
693: /*
694: * Postpone the effect of \z while handling
695: * an overstrike sequence from ascii_uc2str().
696: */
697:
698: if (word[i] == '\b' &&
699: (p->flags & TERMP_BACKBEFORE)) {
700: p->flags &= ~TERMP_BACKBEFORE;
701: p->flags |= TERMP_BACKAFTER;
702: }
703: }
1.79 kristaps 704: }
1.219 schwarze 705: }
706:
707: void
708: term_setwidth(struct termp *p, const char *wstr)
709: {
710: struct roffsu su;
1.247 schwarze 711: int iop, width;
1.219 schwarze 712:
1.220 schwarze 713: iop = 0;
714: width = 0;
1.219 schwarze 715: if (NULL != wstr) {
716: switch (*wstr) {
1.222 schwarze 717: case '+':
1.219 schwarze 718: iop = 1;
719: wstr++;
720: break;
1.222 schwarze 721: case '-':
1.219 schwarze 722: iop = -1;
723: wstr++;
724: break;
725: default:
726: break;
727: }
1.220 schwarze 728: if (a2roffsu(wstr, &su, SCALE_MAX))
729: width = term_hspan(p, &su);
730: else
1.219 schwarze 731: iop = 0;
732: }
733: (*p->setwidth)(p, iop, width);
1.79 kristaps 734: }
1.106 kristaps 735:
1.107 kristaps 736: size_t
1.149 kristaps 737: term_len(const struct termp *p, size_t sz)
738: {
739:
1.252 schwarze 740: return (*p->width)(p, ' ') * sz;
1.149 kristaps 741: }
742:
1.203 schwarze 743: static size_t
744: cond_width(const struct termp *p, int c, int *skip)
745: {
746:
747: if (*skip) {
748: (*skip) = 0;
1.252 schwarze 749: return 0;
1.203 schwarze 750: } else
1.252 schwarze 751: return (*p->width)(p, c);
1.203 schwarze 752: }
1.149 kristaps 753:
754: size_t
755: term_strlen(const struct termp *p, const char *cp)
756: {
1.184 kristaps 757: size_t sz, rsz, i;
1.233 schwarze 758: int ssz, skip, uc;
1.171 kristaps 759: const char *seq, *rhs;
1.196 kristaps 760: enum mandoc_esc esc;
1.216 schwarze 761: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
762: ASCII_BREAK, '\0' };
1.171 kristaps 763:
1.184 kristaps 764: /*
765: * Account for escaped sequences within string length
766: * calculations. This follows the logic in term_word() as we
767: * must calculate the width of produced strings.
768: */
769:
770: sz = 0;
1.203 schwarze 771: skip = 0;
1.189 kristaps 772: while ('\0' != *cp) {
773: rsz = strcspn(cp, rej);
774: for (i = 0; i < rsz; i++)
1.203 schwarze 775: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 776:
1.184 kristaps 777: switch (*cp) {
1.222 schwarze 778: case '\\':
1.189 kristaps 779: cp++;
1.196 kristaps 780: esc = mandoc_escape(&cp, &seq, &ssz);
781: if (ESCAPE_ERROR == esc)
1.224 schwarze 782: continue;
1.196 kristaps 783:
784: rhs = NULL;
785:
786: switch (esc) {
1.222 schwarze 787: case ESCAPE_UNICODE:
1.234 schwarze 788: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 789: break;
1.222 schwarze 790: case ESCAPE_NUMBERED:
1.233 schwarze 791: uc = mchars_num2char(seq, ssz);
792: if (uc < 0)
793: continue;
1.171 kristaps 794: break;
1.222 schwarze 795: case ESCAPE_SPECIAL:
1.233 schwarze 796: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 797: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 798: if (rhs != NULL)
799: break;
800: } else {
1.254 schwarze 801: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 802: if (uc > 0)
803: sz += cond_width(p, uc, &skip);
1.229 schwarze 804: }
1.233 schwarze 805: continue;
1.222 schwarze 806: case ESCAPE_SKIPCHAR:
1.203 schwarze 807: skip = 1;
1.243 schwarze 808: continue;
809: case ESCAPE_OVERSTRIKE:
810: rsz = 0;
811: rhs = seq + ssz;
812: while (seq < rhs) {
813: if (*seq == '\\') {
814: mandoc_escape(&seq, NULL, NULL);
815: continue;
816: }
817: i = (*p->width)(p, *seq++);
818: if (rsz < i)
819: rsz = i;
820: }
821: sz += rsz;
1.233 schwarze 822: continue;
1.171 kristaps 823: default:
1.233 schwarze 824: continue;
1.171 kristaps 825: }
1.149 kristaps 826:
1.233 schwarze 827: /*
828: * Common handling for Unicode and numbered
829: * character escape sequences.
830: */
831:
832: if (rhs == NULL) {
833: if (p->enc == TERMENC_ASCII) {
834: rhs = ascii_uc2str(uc);
835: rsz = strlen(rhs);
836: } else {
837: if ((uc < 0x20 && uc != 0x09) ||
838: (uc > 0x7E && uc < 0xA0))
839: uc = 0xFFFD;
840: sz += cond_width(p, uc, &skip);
841: continue;
842: }
843: }
1.184 kristaps 844:
1.203 schwarze 845: if (skip) {
846: skip = 0;
847: break;
848: }
1.233 schwarze 849:
850: /*
851: * Common handling for all escape sequences
852: * printing more than one character.
853: */
1.203 schwarze 854:
1.184 kristaps 855: for (i = 0; i < rsz; i++)
856: sz += (*p->width)(p, *rhs++);
857: break;
1.222 schwarze 858: case ASCII_NBRSP:
1.203 schwarze 859: sz += cond_width(p, ' ', &skip);
1.176 kristaps 860: cp++;
1.184 kristaps 861: break;
1.222 schwarze 862: case ASCII_HYPH:
1.203 schwarze 863: sz += cond_width(p, '-', &skip);
1.176 kristaps 864: cp++;
1.184 kristaps 865: break;
866: default:
867: break;
868: }
1.189 kristaps 869: }
1.149 kristaps 870:
1.252 schwarze 871: return sz;
1.149 kristaps 872: }
873:
1.240 schwarze 874: int
1.149 kristaps 875: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 876: {
877: double r;
1.241 schwarze 878: int ri;
1.106 kristaps 879:
1.107 kristaps 880: switch (su->unit) {
1.239 schwarze 881: case SCALE_BU:
882: r = su->scale / 40.0;
883: break;
1.222 schwarze 884: case SCALE_CM:
1.239 schwarze 885: r = su->scale * 6.0 / 2.54;
886: break;
887: case SCALE_FS:
888: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 889: break;
1.222 schwarze 890: case SCALE_IN:
1.225 schwarze 891: r = su->scale * 6.0;
1.106 kristaps 892: break;
1.239 schwarze 893: case SCALE_MM:
894: r = su->scale * 0.006;
895: break;
1.222 schwarze 896: case SCALE_PC:
1.107 kristaps 897: r = su->scale;
1.106 kristaps 898: break;
1.222 schwarze 899: case SCALE_PT:
1.239 schwarze 900: r = su->scale / 12.0;
1.106 kristaps 901: break;
1.239 schwarze 902: case SCALE_EN:
903: case SCALE_EM:
904: r = su->scale * 0.6;
1.106 kristaps 905: break;
1.222 schwarze 906: case SCALE_VS:
1.107 kristaps 907: r = su->scale;
1.106 kristaps 908: break;
909: default:
1.239 schwarze 910: abort();
1.106 kristaps 911: }
1.241 schwarze 912: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 913: return ri < 66 ? ri : 1;
1.106 kristaps 914: }
915:
1.247 schwarze 916: /*
917: * Convert a scaling width to basic units, rounding down.
918: */
1.240 schwarze 919: int
1.149 kristaps 920: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 921: {
1.108 kristaps 922:
1.252 schwarze 923: return (*p->hspan)(p, su);
1.106 kristaps 924: }
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