Annotation of mandoc/term.c, Revision 1.269
1.269 ! schwarze 1: /* $Id: term.c,v 1.268 2017/06/08 12:54:58 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 *);
1.266 schwarze 35: static void adjbuf(struct termp_col *, 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);
1.264 schwarze 39: static void endline(struct termp *);
1.11 kristaps 40:
1.222 schwarze 41:
1.145 kristaps 42: void
1.269 ! schwarze 43: term_setcol(struct termp *p, size_t maxtcol)
! 44: {
! 45: if (maxtcol > p->maxtcol) {
! 46: p->tcols = mandoc_recallocarray(p->tcols,
! 47: p->maxtcol, maxtcol, sizeof(*p->tcols));
! 48: p->maxtcol = maxtcol;
! 49: }
! 50: p->lasttcol = maxtcol - 1;
! 51: p->tcol = p->tcols;
! 52: }
! 53:
! 54: void
1.71 kristaps 55: term_free(struct termp *p)
1.14 kristaps 56: {
1.266 schwarze 57: for (p->tcol = p->tcols; p->tcol < p->tcols + p->maxtcol; p->tcol++)
58: free(p->tcol->buf);
59: free(p->tcols);
1.238 schwarze 60: free(p->fontq);
1.142 kristaps 61: free(p);
62: }
63:
64: void
1.222 schwarze 65: term_begin(struct termp *p, term_margin head,
1.246 schwarze 66: term_margin foot, const struct roff_meta *arg)
1.142 kristaps 67: {
68:
69: p->headf = head;
70: p->footf = foot;
71: p->argf = arg;
1.146 kristaps 72: (*p->begin)(p);
1.142 kristaps 73: }
74:
75: void
76: term_end(struct termp *p)
77: {
78:
1.146 kristaps 79: (*p->end)(p);
1.14 kristaps 80: }
81:
1.71 kristaps 82: /*
1.221 schwarze 83: * Flush a chunk of text. By default, break the output line each time
84: * the right margin is reached, and continue output on the next line
85: * at the same offset as the chunk itself. By default, also break the
86: * output line at the end of the chunk.
1.130 kristaps 87: * The following flags may be specified:
1.71 kristaps 88: *
1.221 schwarze 89: * - TERMP_NOBREAK: Do not break the output line at the right margin,
90: * but only at the max right margin. Also, do not break the output
91: * line at the end of the chunk, such that the next call can pad to
92: * the next column. However, if less than p->trailspace blanks,
93: * which can be 0, 1, or 2, remain to the right margin, the line
94: * will be broken.
1.250 schwarze 95: * - TERMP_BRTRSP: Consider trailing whitespace significant
96: * when deciding whether the chunk fits or not.
1.221 schwarze 97: * - TERMP_BRIND: If the chunk does not fit and the output line has
98: * to be broken, start the next line at the right margin instead
99: * of at the offset. Used together with TERMP_NOBREAK for the tags
100: * in various kinds of tagged lists.
1.263 schwarze 101: * - TERMP_HANG: Do not break the output line at the right margin,
1.221 schwarze 102: * append the next chunk after it even if this one is too long.
103: * To be used together with TERMP_NOBREAK.
1.263 schwarze 104: * - TERMP_NOPAD: Start writing at the current position,
105: * do not pad with blank characters up to the offset.
1.71 kristaps 106: */
107: void
108: term_flushln(struct termp *p)
1.53 kristaps 109: {
1.114 kristaps 110: size_t vis; /* current visual position on output */
111: size_t vbl; /* number of blanks to prepend to output */
1.136 schwarze 112: size_t vend; /* end of word visual position on output */
1.114 kristaps 113: size_t bp; /* visual right border position */
1.172 schwarze 114: size_t dv; /* temporary for visual pos calculations */
1.266 schwarze 115: size_t j; /* temporary loop index for p->tcol->buf */
1.210 schwarze 116: size_t jhy; /* last hyph before overflow w/r/t j */
1.152 kristaps 117: size_t maxvis; /* output position of visible boundary */
1.266 schwarze 118: int ntab; /* number of tabs to prepend */
1.53 kristaps 119:
1.266 schwarze 120: vbl = (p->flags & TERMP_NOPAD) || p->tcol->offset < p->viscol ?
121: 0 : p->tcol->offset - p->viscol;
1.263 schwarze 122: if (p->minbl && vbl < p->minbl)
123: vbl = p->minbl;
1.266 schwarze 124: maxvis = p->tcol->rmargin > p->viscol + vbl ?
125: p->tcol->rmargin - p->viscol - vbl : 0;
1.263 schwarze 126: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
127: p->maxrmargin > p->viscol + vbl ?
128: p->maxrmargin - p->viscol - vbl : 0;
1.174 schwarze 129: vis = vend = 0;
1.115 kristaps 130:
1.269 ! schwarze 131: if ((p->flags && TERMP_MULTICOL) == 0)
1.267 schwarze 132: p->tcol->col = 0;
1.269 ! schwarze 133: while (p->tcol->col < p->tcol->lastcol) {
1.267 schwarze 134:
1.71 kristaps 135: /*
1.154 kristaps 136: * Handle literal tab characters: collapse all
137: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 138: */
1.267 schwarze 139:
1.205 schwarze 140: ntab = 0;
1.269 ! schwarze 141: while (p->tcol->col < p->tcol->lastcol &&
1.267 schwarze 142: p->tcol->buf[p->tcol->col] == '\t') {
1.260 schwarze 143: vend = term_tab_next(vis);
1.138 schwarze 144: vbl += vend - vis;
145: vis = vend;
1.205 schwarze 146: ntab++;
1.267 schwarze 147: p->tcol->col++;
1.138 schwarze 148: }
149:
150: /*
1.71 kristaps 151: * Count up visible word characters. Control sequences
152: * (starting with the CSI) aren't counted. A space
153: * generates a non-printing word, which is valid (the
154: * space is printed according to regular spacing rules).
155: */
156:
1.267 schwarze 157: jhy = 0;
1.269 ! schwarze 158: for (j = p->tcol->col; j < p->tcol->lastcol; j++) {
1.266 schwarze 159: if (p->tcol->buf[j] == ' ' || p->tcol->buf[j] == '\t')
1.71 kristaps 160: break;
1.154 kristaps 161:
1.257 schwarze 162: /* Back over the last printed character. */
1.266 schwarze 163: if (p->tcol->buf[j] == '\b') {
1.153 kristaps 164: assert(j);
1.266 schwarze 165: vend -= (*p->width)(p, p->tcol->buf[j - 1]);
1.154 kristaps 166: continue;
1.153 kristaps 167: }
1.154 kristaps 168:
169: /* Regular word. */
170: /* Break at the hyphen point if we overrun. */
1.222 schwarze 171: if (vend > vis && vend < bp &&
1.266 schwarze 172: (p->tcol->buf[j] == ASCII_HYPH||
173: p->tcol->buf[j] == ASCII_BREAK))
1.154 kristaps 174: jhy = j;
175:
1.217 schwarze 176: /*
177: * Hyphenation now decided, put back a real
178: * hyphen such that we get the correct width.
179: */
1.266 schwarze 180: if (p->tcol->buf[j] == ASCII_HYPH)
181: p->tcol->buf[j] = '-';
1.217 schwarze 182:
1.266 schwarze 183: vend += (*p->width)(p, p->tcol->buf[j]);
1.71 kristaps 184: }
1.53 kristaps 185:
1.71 kristaps 186: /*
1.81 kristaps 187: * Find out whether we would exceed the right margin.
1.136 schwarze 188: * If so, break to the next line.
1.81 kristaps 189: */
1.267 schwarze 190:
191: if (vend > bp && jhy == 0 && vis > 0 &&
1.264 schwarze 192: (p->flags & TERMP_BRNEVER) == 0) {
1.269 ! schwarze 193: if (p->flags & TERMP_MULTICOL)
1.267 schwarze 194: return;
195:
196: endline(p);
1.136 schwarze 197: vend -= vis;
1.205 schwarze 198:
1.260 schwarze 199: /* Use pending tabs on the new line. */
200:
201: vbl = 0;
202: while (ntab--)
203: vbl = term_tab_next(vbl);
204:
205: /* Re-establish indentation. */
1.205 schwarze 206:
1.263 schwarze 207: if (p->flags & TERMP_BRIND)
1.266 schwarze 208: vbl += p->tcol->rmargin;
1.263 schwarze 209: else
1.266 schwarze 210: vbl += p->tcol->offset;
211: maxvis = p->tcol->rmargin > vbl ?
212: p->tcol->rmargin - vbl : 0;
1.263 schwarze 213: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
214: p->maxrmargin > vbl ? p->maxrmargin - vbl : 0;
1.71 kristaps 215: }
1.138 schwarze 216:
1.267 schwarze 217: /*
218: * Write out the rest of the word.
219: */
220:
1.269 ! schwarze 221: for ( ; p->tcol->col < p->tcol->lastcol; p->tcol->col++) {
1.267 schwarze 222: if (vend > bp && jhy > 0 && p->tcol->col > jhy)
1.140 kristaps 223: break;
1.267 schwarze 224: if (p->tcol->buf[p->tcol->col] == '\t')
1.138 schwarze 225: break;
1.267 schwarze 226: if (p->tcol->buf[p->tcol->col] == ' ') {
227: j = p->tcol->col;
1.269 ! schwarze 228: while (p->tcol->col < p->tcol->lastcol &&
1.267 schwarze 229: p->tcol->buf[p->tcol->col] == ' ')
230: p->tcol->col++;
231: dv = (p->tcol->col - j) * (*p->width)(p, ' ');
1.172 schwarze 232: vbl += dv;
233: vend += dv;
1.71 kristaps 234: break;
1.136 schwarze 235: }
1.267 schwarze 236: if (p->tcol->buf[p->tcol->col] == ASCII_NBRSP) {
1.153 kristaps 237: vbl += (*p->width)(p, ' ');
1.136 schwarze 238: continue;
239: }
1.267 schwarze 240: if (p->tcol->buf[p->tcol->col] == ASCII_BREAK)
1.216 schwarze 241: continue;
1.130 kristaps 242:
1.136 schwarze 243: /*
244: * Now we definitely know there will be
245: * printable characters to output,
246: * so write preceding white space now.
247: */
248: if (vbl) {
1.146 kristaps 249: (*p->advance)(p, vbl);
1.139 schwarze 250: p->viscol += vbl;
1.136 schwarze 251: vbl = 0;
1.200 schwarze 252: }
253:
1.267 schwarze 254: (*p->letter)(p, p->tcol->buf[p->tcol->col]);
255: if (p->tcol->buf[p->tcol->col] == '\b')
256: p->viscol -= (*p->width)(p,
257: p->tcol->buf[p->tcol->col - 1]);
1.222 schwarze 258: else
1.267 schwarze 259: p->viscol += (*p->width)(p,
260: p->tcol->buf[p->tcol->col]);
1.136 schwarze 261: }
262: vis = vend;
1.71 kristaps 263: }
1.168 schwarze 264:
265: /*
266: * If there was trailing white space, it was not printed;
267: * so reset the cursor position accordingly.
268: */
1.267 schwarze 269:
1.235 schwarze 270: if (vis > vbl)
1.200 schwarze 271: vis -= vbl;
1.235 schwarze 272: else
273: vis = 0;
1.111 kristaps 274:
1.269 ! schwarze 275: p->col = p->tcol->col = p->tcol->lastcol = 0;
1.264 schwarze 276: p->minbl = p->trailspace;
1.263 schwarze 277: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD);
1.15 kristaps 278:
1.269 ! schwarze 279: if (p->flags & TERMP_MULTICOL)
! 280: return;
! 281:
1.250 schwarze 282: /* Trailing whitespace is significant in some columns. */
1.267 schwarze 283:
1.250 schwarze 284: if (vis && vbl && (TERMP_BRTRSP & p->flags))
285: vis += vbl;
1.15 kristaps 286:
1.200 schwarze 287: /* If the column was overrun, break the line. */
1.264 schwarze 288: if ((p->flags & TERMP_NOBREAK) == 0 ||
289: ((p->flags & TERMP_HANG) == 0 &&
290: vis + p->trailspace * (*p->width)(p, ' ') > maxvis))
291: endline(p);
292: }
293:
294: static void
295: endline(struct termp *p)
296: {
297: if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) {
298: p->mc = NULL;
299: p->flags &= ~TERMP_ENDMC;
300: }
301: if (p->mc != NULL) {
302: if (p->viscol && p->maxrmargin >= p->viscol)
303: (*p->advance)(p, p->maxrmargin - p->viscol + 1);
304: p->flags |= TERMP_NOBUF | TERMP_NOSPACE;
305: term_word(p, p->mc);
306: p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC);
307: }
308: p->viscol = 0;
309: p->minbl = 0;
310: (*p->endline)(p);
1.15 kristaps 311: }
312:
1.222 schwarze 313: /*
1.71 kristaps 314: * A newline only breaks an existing line; it won't assert vertical
315: * space. All data in the output buffer is flushed prior to the newline
316: * assertion.
317: */
318: void
319: term_newln(struct termp *p)
1.15 kristaps 320: {
321:
1.71 kristaps 322: p->flags |= TERMP_NOSPACE;
1.269 ! schwarze 323: if (p->tcol->lastcol || p->viscol)
1.200 schwarze 324: term_flushln(p);
1.16 kristaps 325: }
326:
1.71 kristaps 327: /*
328: * Asserts a vertical space (a full, empty line-break between lines).
329: * Note that if used twice, this will cause two blank spaces and so on.
330: * All data in the output buffer is flushed prior to the newline
331: * assertion.
332: */
333: void
334: term_vspace(struct termp *p)
1.16 kristaps 335: {
336:
1.62 kristaps 337: term_newln(p);
1.139 schwarze 338: p->viscol = 0;
1.264 schwarze 339: p->minbl = 0;
1.202 schwarze 340: if (0 < p->skipvsp)
341: p->skipvsp--;
342: else
343: (*p->endline)(p);
1.16 kristaps 344: }
345:
1.238 schwarze 346: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 347: void
348: term_fontlast(struct termp *p)
349: {
350: enum termfont f;
351:
352: f = p->fontl;
353: p->fontl = p->fontq[p->fonti];
354: p->fontq[p->fonti] = f;
355: }
356:
1.238 schwarze 357: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 358: void
359: term_fontrepl(struct termp *p, enum termfont f)
360: {
361:
362: p->fontl = p->fontq[p->fonti];
363: p->fontq[p->fonti] = f;
364: }
365:
1.238 schwarze 366: /* Set font, save previous. */
1.125 kristaps 367: void
368: term_fontpush(struct termp *p, enum termfont f)
369: {
370:
371: p->fontl = p->fontq[p->fonti];
1.238 schwarze 372: if (++p->fonti == p->fontsz) {
373: p->fontsz += 8;
374: p->fontq = mandoc_reallocarray(p->fontq,
1.256 schwarze 375: p->fontsz, sizeof(*p->fontq));
1.238 schwarze 376: }
377: p->fontq[p->fonti] = f;
1.125 kristaps 378: }
379:
1.238 schwarze 380: /* Flush to make the saved pointer current again. */
1.125 kristaps 381: void
1.244 schwarze 382: term_fontpopq(struct termp *p, int i)
1.125 kristaps 383: {
384:
1.244 schwarze 385: assert(i >= 0);
386: if (p->fonti > i)
387: p->fonti = i;
1.125 kristaps 388: }
1.94 kristaps 389:
1.238 schwarze 390: /* Pop one font off the stack. */
1.125 kristaps 391: void
392: term_fontpop(struct termp *p)
393: {
394:
395: assert(p->fonti);
396: p->fonti--;
1.17 kristaps 397: }
398:
1.71 kristaps 399: /*
400: * Handle pwords, partial words, which may be either a single word or a
401: * phrase that cannot be broken down (such as a literal string). This
402: * handles word styling.
403: */
1.86 kristaps 404: void
405: term_word(struct termp *p, const char *word)
1.65 kristaps 406: {
1.261 schwarze 407: struct roffsu su;
1.214 schwarze 408: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 409: const char *seq, *cp;
1.194 kristaps 410: int sz, uc;
1.262 schwarze 411: size_t csz, lsz, ssz;
1.184 kristaps 412: enum mandoc_esc esc;
1.100 kristaps 413:
1.264 schwarze 414: if ((p->flags & TERMP_NOBUF) == 0) {
415: if ((p->flags & TERMP_NOSPACE) == 0) {
416: if ((p->flags & TERMP_KEEP) == 0) {
1.151 schwarze 417: bufferc(p, ' ');
1.264 schwarze 418: if (p->flags & TERMP_SENTENCE)
419: bufferc(p, ' ');
420: } else
421: bufferc(p, ASCII_NBRSP);
422: }
423: if (p->flags & TERMP_PREKEEP)
424: p->flags |= TERMP_KEEP;
425: if (p->flags & TERMP_NONOSPACE)
426: p->flags |= TERMP_NOSPACE;
427: else
428: p->flags &= ~TERMP_NOSPACE;
429: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
430: p->skipvsp = 0;
1.133 kristaps 431: }
1.65 kristaps 432:
1.184 kristaps 433: while ('\0' != *word) {
1.203 schwarze 434: if ('\\' != *word) {
1.214 schwarze 435: if (TERMP_NBRWORD & p->flags) {
436: if (' ' == *word) {
437: encode(p, nbrsp, 1);
438: word++;
439: continue;
440: }
441: ssz = strcspn(word, "\\ ");
442: } else
443: ssz = strcspn(word, "\\");
1.162 kristaps 444: encode(p, word, ssz);
1.203 schwarze 445: word += (int)ssz;
1.124 kristaps 446: continue;
1.203 schwarze 447: }
1.124 kristaps 448:
1.184 kristaps 449: word++;
450: esc = mandoc_escape(&word, &seq, &sz);
451: if (ESCAPE_ERROR == esc)
1.224 schwarze 452: continue;
1.124 kristaps 453:
1.184 kristaps 454: switch (esc) {
1.222 schwarze 455: case ESCAPE_UNICODE:
1.229 schwarze 456: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 457: break;
1.222 schwarze 458: case ESCAPE_NUMBERED:
1.233 schwarze 459: uc = mchars_num2char(seq, sz);
460: if (uc < 0)
461: continue;
1.184 kristaps 462: break;
1.222 schwarze 463: case ESCAPE_SPECIAL:
1.229 schwarze 464: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 465: cp = mchars_spec2str(seq, sz, &ssz);
1.232 schwarze 466: if (cp != NULL)
1.229 schwarze 467: encode(p, cp, ssz);
468: } else {
1.254 schwarze 469: uc = mchars_spec2cp(seq, sz);
1.230 schwarze 470: if (uc > 0)
471: encode1(p, uc);
1.229 schwarze 472: }
1.233 schwarze 473: continue;
1.222 schwarze 474: case ESCAPE_FONTBOLD:
1.125 kristaps 475: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 476: continue;
1.222 schwarze 477: case ESCAPE_FONTITALIC:
1.125 kristaps 478: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 479: continue;
1.222 schwarze 480: case ESCAPE_FONTBI:
1.209 schwarze 481: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 482: continue;
1.222 schwarze 483: case ESCAPE_FONT:
484: case ESCAPE_FONTROMAN:
1.125 kristaps 485: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 486: continue;
1.222 schwarze 487: case ESCAPE_FONTPREV:
1.125 kristaps 488: term_fontlast(p);
1.233 schwarze 489: continue;
1.222 schwarze 490: case ESCAPE_NOSPACE:
1.248 schwarze 491: if (p->flags & TERMP_BACKAFTER)
492: p->flags &= ~TERMP_BACKAFTER;
493: else if (*word == '\0')
1.237 schwarze 494: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.261 schwarze 495: continue;
496: case ESCAPE_HORIZ:
1.268 schwarze 497: if (a2roffsu(seq, &su, SCALE_EM) == NULL)
1.261 schwarze 498: continue;
499: uc = term_hspan(p, &su) / 24;
500: if (uc > 0)
501: while (uc-- > 0)
502: bufferc(p, ASCII_NBRSP);
503: else if (p->col > (size_t)(-uc))
504: p->col += uc;
505: else {
506: uc += p->col;
507: p->col = 0;
1.266 schwarze 508: if (p->tcol->offset > (size_t)(-uc)) {
1.261 schwarze 509: p->ti += uc;
1.266 schwarze 510: p->tcol->offset += uc;
1.261 schwarze 511: } else {
1.266 schwarze 512: p->ti -= p->tcol->offset;
513: p->tcol->offset = 0;
1.261 schwarze 514: }
1.262 schwarze 515: }
516: continue;
517: case ESCAPE_HLINE:
1.268 schwarze 518: if ((seq = a2roffsu(seq, &su, SCALE_EM)) == NULL)
1.262 schwarze 519: continue;
520: uc = term_hspan(p, &su) / 24;
521: if (uc <= 0) {
1.266 schwarze 522: if (p->tcol->rmargin <= p->tcol->offset)
1.262 schwarze 523: continue;
1.266 schwarze 524: lsz = p->tcol->rmargin - p->tcol->offset;
1.262 schwarze 525: } else
526: lsz = uc;
1.268 schwarze 527: if (*seq == '\0')
1.262 schwarze 528: uc = -1;
529: else if (*seq == '\\') {
530: seq++;
531: esc = mandoc_escape(&seq, &cp, &sz);
532: switch (esc) {
533: case ESCAPE_UNICODE:
534: uc = mchars_num2uc(cp + 1, sz - 1);
535: break;
536: case ESCAPE_NUMBERED:
537: uc = mchars_num2char(cp, sz);
538: break;
539: case ESCAPE_SPECIAL:
540: uc = mchars_spec2cp(cp, sz);
541: break;
542: default:
543: uc = -1;
544: break;
545: }
546: } else
547: uc = *seq;
548: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
549: uc = '_';
550: if (p->enc == TERMENC_ASCII) {
551: cp = ascii_uc2str(uc);
552: csz = term_strlen(p, cp);
553: ssz = strlen(cp);
554: } else
555: csz = (*p->width)(p, uc);
556: while (lsz >= csz) {
557: if (p->enc == TERMENC_ASCII)
558: encode(p, cp, ssz);
559: else
560: encode1(p, uc);
561: lsz -= csz;
1.261 schwarze 562: }
1.233 schwarze 563: continue;
1.222 schwarze 564: case ESCAPE_SKIPCHAR:
1.248 schwarze 565: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 566: continue;
1.243 schwarze 567: case ESCAPE_OVERSTRIKE:
568: cp = seq + sz;
569: while (seq < cp) {
570: if (*seq == '\\') {
571: mandoc_escape(&seq, NULL, NULL);
572: continue;
573: }
574: encode1(p, *seq++);
1.248 schwarze 575: if (seq < cp) {
576: if (p->flags & TERMP_BACKBEFORE)
577: p->flags |= TERMP_BACKAFTER;
578: else
579: p->flags |= TERMP_BACKBEFORE;
580: }
1.243 schwarze 581: }
1.249 schwarze 582: /* Trim trailing backspace/blank pair. */
1.269 ! schwarze 583: if (p->tcol->lastcol > 2 &&
! 584: (p->tcol->buf[p->tcol->lastcol - 1] == ' ' ||
! 585: p->tcol->buf[p->tcol->lastcol - 1] == '\t'))
! 586: p->tcol->lastcol -= 2;
! 587: if (p->col > p->tcol->lastcol)
! 588: p->col = p->tcol->lastcol;
1.248 schwarze 589: continue;
1.124 kristaps 590: default:
1.233 schwarze 591: continue;
592: }
593:
594: /*
595: * Common handling for Unicode and numbered
596: * character escape sequences.
597: */
598:
599: if (p->enc == TERMENC_ASCII) {
600: cp = ascii_uc2str(uc);
601: encode(p, cp, strlen(cp));
602: } else {
603: if ((uc < 0x20 && uc != 0x09) ||
604: (uc > 0x7E && uc < 0xA0))
605: uc = 0xFFFD;
606: encode1(p, uc);
1.124 kristaps 607: }
608: }
1.214 schwarze 609: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 610: }
611:
1.71 kristaps 612: static void
1.266 schwarze 613: adjbuf(struct termp_col *c, size_t sz)
1.51 kristaps 614: {
1.266 schwarze 615: if (c->maxcols == 0)
616: c->maxcols = 1024;
617: while (c->maxcols <= sz)
618: c->maxcols <<= 2;
619: c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
1.51 kristaps 620: }
621:
1.79 kristaps 622: static void
1.125 kristaps 623: bufferc(struct termp *p, char c)
624: {
1.264 schwarze 625: if (p->flags & TERMP_NOBUF) {
626: (*p->letter)(p, c);
627: return;
628: }
1.266 schwarze 629: if (p->col + 1 >= p->tcol->maxcols)
630: adjbuf(p->tcol, p->col + 1);
1.269 ! schwarze 631: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 632: p->tcol->buf[p->col] = c;
1.269 ! schwarze 633: if (p->tcol->lastcol < ++p->col)
! 634: p->tcol->lastcol = p->col;
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:
1.264 schwarze 647: if (p->flags & TERMP_NOBUF) {
648: (*p->letter)(p, c);
649: return;
650: }
651:
1.266 schwarze 652: if (p->col + 7 >= p->tcol->maxcols)
653: adjbuf(p->tcol, p->col + 7);
1.194 kristaps 654:
1.255 schwarze 655: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 656: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 657:
1.248 schwarze 658: if (p->flags & TERMP_BACKBEFORE) {
1.266 schwarze 659: if (p->tcol->buf[p->col - 1] == ' ' ||
660: p->tcol->buf[p->col - 1] == '\t')
1.249 schwarze 661: p->col--;
662: else
1.266 schwarze 663: p->tcol->buf[p->col++] = '\b';
1.248 schwarze 664: p->flags &= ~TERMP_BACKBEFORE;
665: }
1.266 schwarze 666: if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
667: p->tcol->buf[p->col++] = '_';
668: p->tcol->buf[p->col++] = '\b';
669: }
670: if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
671: if (c == ASCII_HYPH)
672: p->tcol->buf[p->col++] = '-';
1.209 schwarze 673: else
1.266 schwarze 674: p->tcol->buf[p->col++] = c;
675: p->tcol->buf[p->col++] = '\b';
1.209 schwarze 676: }
1.269 ! schwarze 677: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 678: p->tcol->buf[p->col] = c;
1.269 ! schwarze 679: if (p->tcol->lastcol < ++p->col)
! 680: p->tcol->lastcol = p->col;
1.248 schwarze 681: if (p->flags & TERMP_BACKAFTER) {
682: p->flags |= TERMP_BACKBEFORE;
683: p->flags &= ~TERMP_BACKAFTER;
684: }
1.194 kristaps 685: }
686:
1.125 kristaps 687: static void
688: encode(struct termp *p, const char *word, size_t sz)
689: {
1.210 schwarze 690: size_t i;
1.264 schwarze 691:
692: if (p->flags & TERMP_NOBUF) {
693: for (i = 0; i < sz; i++)
694: (*p->letter)(p, word[i]);
695: return;
696: }
1.188 kristaps 697:
1.266 schwarze 698: if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
699: adjbuf(p->tcol, p->col + 2 + (sz * 5));
1.165 kristaps 700:
1.210 schwarze 701: for (i = 0; i < sz; i++) {
1.209 schwarze 702: if (ASCII_HYPH == word[i] ||
703: isgraph((unsigned char)word[i]))
704: encode1(p, word[i]);
1.259 schwarze 705: else {
1.269 ! schwarze 706: if (p->tcol->lastcol <= p->col ||
1.265 schwarze 707: (word[i] != ' ' && word[i] != ASCII_NBRSP))
1.266 schwarze 708: p->tcol->buf[p->col] = word[i];
1.265 schwarze 709: p->col++;
1.259 schwarze 710:
711: /*
712: * Postpone the effect of \z while handling
713: * an overstrike sequence from ascii_uc2str().
714: */
715:
716: if (word[i] == '\b' &&
717: (p->flags & TERMP_BACKBEFORE)) {
718: p->flags &= ~TERMP_BACKBEFORE;
719: p->flags |= TERMP_BACKAFTER;
720: }
721: }
1.79 kristaps 722: }
1.269 ! schwarze 723: if (p->tcol->lastcol < p->col)
! 724: p->tcol->lastcol = p->col;
1.219 schwarze 725: }
726:
727: void
728: term_setwidth(struct termp *p, const char *wstr)
729: {
730: struct roffsu su;
1.247 schwarze 731: int iop, width;
1.219 schwarze 732:
1.220 schwarze 733: iop = 0;
734: width = 0;
1.219 schwarze 735: if (NULL != wstr) {
736: switch (*wstr) {
1.222 schwarze 737: case '+':
1.219 schwarze 738: iop = 1;
739: wstr++;
740: break;
1.222 schwarze 741: case '-':
1.219 schwarze 742: iop = -1;
743: wstr++;
744: break;
745: default:
746: break;
747: }
1.268 schwarze 748: if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
1.220 schwarze 749: width = term_hspan(p, &su);
750: else
1.219 schwarze 751: iop = 0;
752: }
753: (*p->setwidth)(p, iop, width);
1.79 kristaps 754: }
1.106 kristaps 755:
1.107 kristaps 756: size_t
1.149 kristaps 757: term_len(const struct termp *p, size_t sz)
758: {
759:
1.252 schwarze 760: return (*p->width)(p, ' ') * sz;
1.149 kristaps 761: }
762:
1.203 schwarze 763: static size_t
764: cond_width(const struct termp *p, int c, int *skip)
765: {
766:
767: if (*skip) {
768: (*skip) = 0;
1.252 schwarze 769: return 0;
1.203 schwarze 770: } else
1.252 schwarze 771: return (*p->width)(p, c);
1.203 schwarze 772: }
1.149 kristaps 773:
774: size_t
775: term_strlen(const struct termp *p, const char *cp)
776: {
1.184 kristaps 777: size_t sz, rsz, i;
1.233 schwarze 778: int ssz, skip, uc;
1.171 kristaps 779: const char *seq, *rhs;
1.196 kristaps 780: enum mandoc_esc esc;
1.216 schwarze 781: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
782: ASCII_BREAK, '\0' };
1.171 kristaps 783:
1.184 kristaps 784: /*
785: * Account for escaped sequences within string length
786: * calculations. This follows the logic in term_word() as we
787: * must calculate the width of produced strings.
788: */
789:
790: sz = 0;
1.203 schwarze 791: skip = 0;
1.189 kristaps 792: while ('\0' != *cp) {
793: rsz = strcspn(cp, rej);
794: for (i = 0; i < rsz; i++)
1.203 schwarze 795: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 796:
1.184 kristaps 797: switch (*cp) {
1.222 schwarze 798: case '\\':
1.189 kristaps 799: cp++;
1.196 kristaps 800: esc = mandoc_escape(&cp, &seq, &ssz);
801: if (ESCAPE_ERROR == esc)
1.224 schwarze 802: continue;
1.196 kristaps 803:
804: rhs = NULL;
805:
806: switch (esc) {
1.222 schwarze 807: case ESCAPE_UNICODE:
1.234 schwarze 808: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 809: break;
1.222 schwarze 810: case ESCAPE_NUMBERED:
1.233 schwarze 811: uc = mchars_num2char(seq, ssz);
812: if (uc < 0)
813: continue;
1.171 kristaps 814: break;
1.222 schwarze 815: case ESCAPE_SPECIAL:
1.233 schwarze 816: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 817: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 818: if (rhs != NULL)
819: break;
820: } else {
1.254 schwarze 821: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 822: if (uc > 0)
823: sz += cond_width(p, uc, &skip);
1.229 schwarze 824: }
1.233 schwarze 825: continue;
1.222 schwarze 826: case ESCAPE_SKIPCHAR:
1.203 schwarze 827: skip = 1;
1.243 schwarze 828: continue;
829: case ESCAPE_OVERSTRIKE:
830: rsz = 0;
831: rhs = seq + ssz;
832: while (seq < rhs) {
833: if (*seq == '\\') {
834: mandoc_escape(&seq, NULL, NULL);
835: continue;
836: }
837: i = (*p->width)(p, *seq++);
838: if (rsz < i)
839: rsz = i;
840: }
841: sz += rsz;
1.233 schwarze 842: continue;
1.171 kristaps 843: default:
1.233 schwarze 844: continue;
1.171 kristaps 845: }
1.149 kristaps 846:
1.233 schwarze 847: /*
848: * Common handling for Unicode and numbered
849: * character escape sequences.
850: */
851:
852: if (rhs == NULL) {
853: if (p->enc == TERMENC_ASCII) {
854: rhs = ascii_uc2str(uc);
855: rsz = strlen(rhs);
856: } else {
857: if ((uc < 0x20 && uc != 0x09) ||
858: (uc > 0x7E && uc < 0xA0))
859: uc = 0xFFFD;
860: sz += cond_width(p, uc, &skip);
861: continue;
862: }
863: }
1.184 kristaps 864:
1.203 schwarze 865: if (skip) {
866: skip = 0;
867: break;
868: }
1.233 schwarze 869:
870: /*
871: * Common handling for all escape sequences
872: * printing more than one character.
873: */
1.203 schwarze 874:
1.184 kristaps 875: for (i = 0; i < rsz; i++)
876: sz += (*p->width)(p, *rhs++);
877: break;
1.222 schwarze 878: case ASCII_NBRSP:
1.203 schwarze 879: sz += cond_width(p, ' ', &skip);
1.176 kristaps 880: cp++;
1.184 kristaps 881: break;
1.222 schwarze 882: case ASCII_HYPH:
1.203 schwarze 883: sz += cond_width(p, '-', &skip);
1.176 kristaps 884: cp++;
1.184 kristaps 885: break;
886: default:
887: break;
888: }
1.189 kristaps 889: }
1.149 kristaps 890:
1.252 schwarze 891: return sz;
1.149 kristaps 892: }
893:
1.240 schwarze 894: int
1.149 kristaps 895: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 896: {
897: double r;
1.241 schwarze 898: int ri;
1.106 kristaps 899:
1.107 kristaps 900: switch (su->unit) {
1.239 schwarze 901: case SCALE_BU:
902: r = su->scale / 40.0;
903: break;
1.222 schwarze 904: case SCALE_CM:
1.239 schwarze 905: r = su->scale * 6.0 / 2.54;
906: break;
907: case SCALE_FS:
908: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 909: break;
1.222 schwarze 910: case SCALE_IN:
1.225 schwarze 911: r = su->scale * 6.0;
1.106 kristaps 912: break;
1.239 schwarze 913: case SCALE_MM:
914: r = su->scale * 0.006;
915: break;
1.222 schwarze 916: case SCALE_PC:
1.107 kristaps 917: r = su->scale;
1.106 kristaps 918: break;
1.222 schwarze 919: case SCALE_PT:
1.239 schwarze 920: r = su->scale / 12.0;
1.106 kristaps 921: break;
1.239 schwarze 922: case SCALE_EN:
923: case SCALE_EM:
924: r = su->scale * 0.6;
1.106 kristaps 925: break;
1.222 schwarze 926: case SCALE_VS:
1.107 kristaps 927: r = su->scale;
1.106 kristaps 928: break;
929: default:
1.239 schwarze 930: abort();
1.106 kristaps 931: }
1.241 schwarze 932: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 933: return ri < 66 ? ri : 1;
1.106 kristaps 934: }
935:
1.247 schwarze 936: /*
937: * Convert a scaling width to basic units, rounding down.
938: */
1.240 schwarze 939: int
1.149 kristaps 940: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 941: {
1.108 kristaps 942:
1.252 schwarze 943: return (*p->hspan)(p, su);
1.106 kristaps 944: }
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