Annotation of mandoc/term.c, Revision 1.261
1.261 ! schwarze 1: /* $Id: term.c,v 1.260 2017/05/07 17:31:45 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;
1.124 kristaps 407: size_t 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: }
! 511: }
1.233 schwarze 512: continue;
1.222 schwarze 513: case ESCAPE_SKIPCHAR:
1.248 schwarze 514: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 515: continue;
1.243 schwarze 516: case ESCAPE_OVERSTRIKE:
517: cp = seq + sz;
518: while (seq < cp) {
519: if (*seq == '\\') {
520: mandoc_escape(&seq, NULL, NULL);
521: continue;
522: }
523: encode1(p, *seq++);
1.248 schwarze 524: if (seq < cp) {
525: if (p->flags & TERMP_BACKBEFORE)
526: p->flags |= TERMP_BACKAFTER;
527: else
528: p->flags |= TERMP_BACKBEFORE;
529: }
1.243 schwarze 530: }
1.249 schwarze 531: /* Trim trailing backspace/blank pair. */
1.258 schwarze 532: if (p->col > 2 &&
533: (p->buf[p->col - 1] == ' ' ||
534: p->buf[p->col - 1] == '\t'))
1.249 schwarze 535: p->col -= 2;
1.248 schwarze 536: continue;
1.124 kristaps 537: default:
1.233 schwarze 538: continue;
539: }
540:
541: /*
542: * Common handling for Unicode and numbered
543: * character escape sequences.
544: */
545:
546: if (p->enc == TERMENC_ASCII) {
547: cp = ascii_uc2str(uc);
548: encode(p, cp, strlen(cp));
549: } else {
550: if ((uc < 0x20 && uc != 0x09) ||
551: (uc > 0x7E && uc < 0xA0))
552: uc = 0xFFFD;
553: encode1(p, uc);
1.124 kristaps 554: }
555: }
1.214 schwarze 556: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 557: }
558:
1.71 kristaps 559: static void
1.210 schwarze 560: adjbuf(struct termp *p, size_t sz)
1.51 kristaps 561: {
562:
1.125 kristaps 563: if (0 == p->maxcols)
564: p->maxcols = 1024;
565: while (sz >= p->maxcols)
566: p->maxcols <<= 2;
567:
1.223 schwarze 568: p->buf = mandoc_reallocarray(p->buf, p->maxcols, sizeof(int));
1.51 kristaps 569: }
570:
1.79 kristaps 571: static void
1.125 kristaps 572: bufferc(struct termp *p, char c)
573: {
574:
575: if (p->col + 1 >= p->maxcols)
576: adjbuf(p, p->col + 1);
577:
1.188 kristaps 578: p->buf[p->col++] = c;
1.125 kristaps 579: }
580:
1.194 kristaps 581: /*
582: * See encode().
583: * Do this for a single (probably unicode) value.
584: * Does not check for non-decorated glyphs.
585: */
586: static void
587: encode1(struct termp *p, int c)
588: {
589: enum termfont f;
590:
1.248 schwarze 591: if (p->col + 7 >= p->maxcols)
592: adjbuf(p, p->col + 7);
1.194 kristaps 593:
1.255 schwarze 594: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 595: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 596:
1.248 schwarze 597: if (p->flags & TERMP_BACKBEFORE) {
1.258 schwarze 598: if (p->buf[p->col - 1] == ' ' || p->buf[p->col - 1] == '\t')
1.249 schwarze 599: p->col--;
600: else
601: p->buf[p->col++] = 8;
1.248 schwarze 602: p->flags &= ~TERMP_BACKBEFORE;
603: }
1.209 schwarze 604: if (TERMFONT_UNDER == f || TERMFONT_BI == f) {
1.194 kristaps 605: p->buf[p->col++] = '_';
1.209 schwarze 606: p->buf[p->col++] = 8;
607: }
608: if (TERMFONT_BOLD == f || TERMFONT_BI == f) {
609: if (ASCII_HYPH == c)
610: p->buf[p->col++] = '-';
611: else
612: p->buf[p->col++] = c;
613: p->buf[p->col++] = 8;
614: }
1.194 kristaps 615: p->buf[p->col++] = c;
1.248 schwarze 616: if (p->flags & TERMP_BACKAFTER) {
617: p->flags |= TERMP_BACKBEFORE;
618: p->flags &= ~TERMP_BACKAFTER;
619: }
1.194 kristaps 620: }
621:
1.125 kristaps 622: static void
623: encode(struct termp *p, const char *word, size_t sz)
624: {
1.210 schwarze 625: size_t i;
1.188 kristaps 626:
1.248 schwarze 627: if (p->col + 2 + (sz * 5) >= p->maxcols)
628: adjbuf(p, p->col + 2 + (sz * 5));
1.165 kristaps 629:
1.210 schwarze 630: for (i = 0; i < sz; i++) {
1.209 schwarze 631: if (ASCII_HYPH == word[i] ||
632: isgraph((unsigned char)word[i]))
633: encode1(p, word[i]);
1.259 schwarze 634: else {
1.188 kristaps 635: p->buf[p->col++] = word[i];
1.259 schwarze 636:
637: /*
638: * Postpone the effect of \z while handling
639: * an overstrike sequence from ascii_uc2str().
640: */
641:
642: if (word[i] == '\b' &&
643: (p->flags & TERMP_BACKBEFORE)) {
644: p->flags &= ~TERMP_BACKBEFORE;
645: p->flags |= TERMP_BACKAFTER;
646: }
647: }
1.79 kristaps 648: }
1.219 schwarze 649: }
650:
651: void
652: term_setwidth(struct termp *p, const char *wstr)
653: {
654: struct roffsu su;
1.247 schwarze 655: int iop, width;
1.219 schwarze 656:
1.220 schwarze 657: iop = 0;
658: width = 0;
1.219 schwarze 659: if (NULL != wstr) {
660: switch (*wstr) {
1.222 schwarze 661: case '+':
1.219 schwarze 662: iop = 1;
663: wstr++;
664: break;
1.222 schwarze 665: case '-':
1.219 schwarze 666: iop = -1;
667: wstr++;
668: break;
669: default:
670: break;
671: }
1.220 schwarze 672: if (a2roffsu(wstr, &su, SCALE_MAX))
673: width = term_hspan(p, &su);
674: else
1.219 schwarze 675: iop = 0;
676: }
677: (*p->setwidth)(p, iop, width);
1.79 kristaps 678: }
1.106 kristaps 679:
1.107 kristaps 680: size_t
1.149 kristaps 681: term_len(const struct termp *p, size_t sz)
682: {
683:
1.252 schwarze 684: return (*p->width)(p, ' ') * sz;
1.149 kristaps 685: }
686:
1.203 schwarze 687: static size_t
688: cond_width(const struct termp *p, int c, int *skip)
689: {
690:
691: if (*skip) {
692: (*skip) = 0;
1.252 schwarze 693: return 0;
1.203 schwarze 694: } else
1.252 schwarze 695: return (*p->width)(p, c);
1.203 schwarze 696: }
1.149 kristaps 697:
698: size_t
699: term_strlen(const struct termp *p, const char *cp)
700: {
1.184 kristaps 701: size_t sz, rsz, i;
1.233 schwarze 702: int ssz, skip, uc;
1.171 kristaps 703: const char *seq, *rhs;
1.196 kristaps 704: enum mandoc_esc esc;
1.216 schwarze 705: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
706: ASCII_BREAK, '\0' };
1.171 kristaps 707:
1.184 kristaps 708: /*
709: * Account for escaped sequences within string length
710: * calculations. This follows the logic in term_word() as we
711: * must calculate the width of produced strings.
712: */
713:
714: sz = 0;
1.203 schwarze 715: skip = 0;
1.189 kristaps 716: while ('\0' != *cp) {
717: rsz = strcspn(cp, rej);
718: for (i = 0; i < rsz; i++)
1.203 schwarze 719: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 720:
1.184 kristaps 721: switch (*cp) {
1.222 schwarze 722: case '\\':
1.189 kristaps 723: cp++;
1.196 kristaps 724: esc = mandoc_escape(&cp, &seq, &ssz);
725: if (ESCAPE_ERROR == esc)
1.224 schwarze 726: continue;
1.196 kristaps 727:
728: rhs = NULL;
729:
730: switch (esc) {
1.222 schwarze 731: case ESCAPE_UNICODE:
1.234 schwarze 732: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 733: break;
1.222 schwarze 734: case ESCAPE_NUMBERED:
1.233 schwarze 735: uc = mchars_num2char(seq, ssz);
736: if (uc < 0)
737: continue;
1.171 kristaps 738: break;
1.222 schwarze 739: case ESCAPE_SPECIAL:
1.233 schwarze 740: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 741: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 742: if (rhs != NULL)
743: break;
744: } else {
1.254 schwarze 745: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 746: if (uc > 0)
747: sz += cond_width(p, uc, &skip);
1.229 schwarze 748: }
1.233 schwarze 749: continue;
1.222 schwarze 750: case ESCAPE_SKIPCHAR:
1.203 schwarze 751: skip = 1;
1.243 schwarze 752: continue;
753: case ESCAPE_OVERSTRIKE:
754: rsz = 0;
755: rhs = seq + ssz;
756: while (seq < rhs) {
757: if (*seq == '\\') {
758: mandoc_escape(&seq, NULL, NULL);
759: continue;
760: }
761: i = (*p->width)(p, *seq++);
762: if (rsz < i)
763: rsz = i;
764: }
765: sz += rsz;
1.233 schwarze 766: continue;
1.171 kristaps 767: default:
1.233 schwarze 768: continue;
1.171 kristaps 769: }
1.149 kristaps 770:
1.233 schwarze 771: /*
772: * Common handling for Unicode and numbered
773: * character escape sequences.
774: */
775:
776: if (rhs == NULL) {
777: if (p->enc == TERMENC_ASCII) {
778: rhs = ascii_uc2str(uc);
779: rsz = strlen(rhs);
780: } else {
781: if ((uc < 0x20 && uc != 0x09) ||
782: (uc > 0x7E && uc < 0xA0))
783: uc = 0xFFFD;
784: sz += cond_width(p, uc, &skip);
785: continue;
786: }
787: }
1.184 kristaps 788:
1.203 schwarze 789: if (skip) {
790: skip = 0;
791: break;
792: }
1.233 schwarze 793:
794: /*
795: * Common handling for all escape sequences
796: * printing more than one character.
797: */
1.203 schwarze 798:
1.184 kristaps 799: for (i = 0; i < rsz; i++)
800: sz += (*p->width)(p, *rhs++);
801: break;
1.222 schwarze 802: case ASCII_NBRSP:
1.203 schwarze 803: sz += cond_width(p, ' ', &skip);
1.176 kristaps 804: cp++;
1.184 kristaps 805: break;
1.222 schwarze 806: case ASCII_HYPH:
1.203 schwarze 807: sz += cond_width(p, '-', &skip);
1.176 kristaps 808: cp++;
1.184 kristaps 809: break;
810: default:
811: break;
812: }
1.189 kristaps 813: }
1.149 kristaps 814:
1.252 schwarze 815: return sz;
1.149 kristaps 816: }
817:
1.240 schwarze 818: int
1.149 kristaps 819: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 820: {
821: double r;
1.241 schwarze 822: int ri;
1.106 kristaps 823:
1.107 kristaps 824: switch (su->unit) {
1.239 schwarze 825: case SCALE_BU:
826: r = su->scale / 40.0;
827: break;
1.222 schwarze 828: case SCALE_CM:
1.239 schwarze 829: r = su->scale * 6.0 / 2.54;
830: break;
831: case SCALE_FS:
832: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 833: break;
1.222 schwarze 834: case SCALE_IN:
1.225 schwarze 835: r = su->scale * 6.0;
1.106 kristaps 836: break;
1.239 schwarze 837: case SCALE_MM:
838: r = su->scale * 0.006;
839: break;
1.222 schwarze 840: case SCALE_PC:
1.107 kristaps 841: r = su->scale;
1.106 kristaps 842: break;
1.222 schwarze 843: case SCALE_PT:
1.239 schwarze 844: r = su->scale / 12.0;
1.106 kristaps 845: break;
1.239 schwarze 846: case SCALE_EN:
847: case SCALE_EM:
848: r = su->scale * 0.6;
1.106 kristaps 849: break;
1.222 schwarze 850: case SCALE_VS:
1.107 kristaps 851: r = su->scale;
1.106 kristaps 852: break;
853: default:
1.239 schwarze 854: abort();
1.106 kristaps 855: }
1.241 schwarze 856: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 857: return ri < 66 ? ri : 1;
1.106 kristaps 858: }
859:
1.247 schwarze 860: /*
861: * Convert a scaling width to basic units, rounding down.
862: */
1.240 schwarze 863: int
1.149 kristaps 864: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 865: {
1.108 kristaps 866:
1.252 schwarze 867: return (*p->hspan)(p, su);
1.106 kristaps 868: }
CVSweb