Annotation of mandoc/term.c, Revision 1.274
1.274 ! schwarze 1: /* $Id: term.c,v 1.273 2017/06/14 23:24:18 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 */
1.270 schwarze 119: int breakline; /* after this word */
1.53 kristaps 120:
1.266 schwarze 121: vbl = (p->flags & TERMP_NOPAD) || p->tcol->offset < p->viscol ?
122: 0 : p->tcol->offset - p->viscol;
1.263 schwarze 123: if (p->minbl && vbl < p->minbl)
124: vbl = p->minbl;
1.266 schwarze 125: maxvis = p->tcol->rmargin > p->viscol + vbl ?
126: p->tcol->rmargin - p->viscol - vbl : 0;
1.263 schwarze 127: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
128: p->maxrmargin > p->viscol + vbl ?
129: p->maxrmargin - p->viscol - vbl : 0;
1.174 schwarze 130: vis = vend = 0;
1.115 kristaps 131:
1.274 ! schwarze 132: if ((p->flags & TERMP_MULTICOL) == 0)
1.267 schwarze 133: p->tcol->col = 0;
1.269 schwarze 134: while (p->tcol->col < p->tcol->lastcol) {
1.267 schwarze 135:
1.71 kristaps 136: /*
1.154 kristaps 137: * Handle literal tab characters: collapse all
138: * subsequent tabs into a single huge set of spaces.
1.138 schwarze 139: */
1.267 schwarze 140:
1.205 schwarze 141: ntab = 0;
1.269 schwarze 142: while (p->tcol->col < p->tcol->lastcol &&
1.267 schwarze 143: p->tcol->buf[p->tcol->col] == '\t') {
1.260 schwarze 144: vend = term_tab_next(vis);
1.138 schwarze 145: vbl += vend - vis;
146: vis = vend;
1.205 schwarze 147: ntab++;
1.267 schwarze 148: p->tcol->col++;
1.138 schwarze 149: }
150:
151: /*
1.71 kristaps 152: * Count up visible word characters. Control sequences
153: * (starting with the CSI) aren't counted. A space
154: * generates a non-printing word, which is valid (the
155: * space is printed according to regular spacing rules).
156: */
157:
1.267 schwarze 158: jhy = 0;
1.270 schwarze 159: breakline = 0;
1.269 schwarze 160: for (j = p->tcol->col; j < p->tcol->lastcol; j++) {
1.270 schwarze 161: if (p->tcol->buf[j] == '\n') {
162: if ((p->flags & TERMP_BRIND) == 0)
163: breakline = 1;
164: continue;
165: }
1.266 schwarze 166: if (p->tcol->buf[j] == ' ' || p->tcol->buf[j] == '\t')
1.71 kristaps 167: break;
1.154 kristaps 168:
1.257 schwarze 169: /* Back over the last printed character. */
1.266 schwarze 170: if (p->tcol->buf[j] == '\b') {
1.153 kristaps 171: assert(j);
1.266 schwarze 172: vend -= (*p->width)(p, p->tcol->buf[j - 1]);
1.154 kristaps 173: continue;
1.153 kristaps 174: }
1.154 kristaps 175:
176: /* Regular word. */
177: /* Break at the hyphen point if we overrun. */
1.222 schwarze 178: if (vend > vis && vend < bp &&
1.266 schwarze 179: (p->tcol->buf[j] == ASCII_HYPH||
180: p->tcol->buf[j] == ASCII_BREAK))
1.154 kristaps 181: jhy = j;
182:
1.217 schwarze 183: /*
184: * Hyphenation now decided, put back a real
185: * hyphen such that we get the correct width.
186: */
1.266 schwarze 187: if (p->tcol->buf[j] == ASCII_HYPH)
188: p->tcol->buf[j] = '-';
1.217 schwarze 189:
1.266 schwarze 190: vend += (*p->width)(p, p->tcol->buf[j]);
1.71 kristaps 191: }
1.53 kristaps 192:
1.71 kristaps 193: /*
1.81 kristaps 194: * Find out whether we would exceed the right margin.
1.136 schwarze 195: * If so, break to the next line.
1.81 kristaps 196: */
1.267 schwarze 197:
198: if (vend > bp && jhy == 0 && vis > 0 &&
1.264 schwarze 199: (p->flags & TERMP_BRNEVER) == 0) {
1.269 schwarze 200: if (p->flags & TERMP_MULTICOL)
1.267 schwarze 201: return;
202:
203: endline(p);
1.136 schwarze 204: vend -= vis;
1.205 schwarze 205:
1.260 schwarze 206: /* Use pending tabs on the new line. */
207:
208: vbl = 0;
209: while (ntab--)
210: vbl = term_tab_next(vbl);
211:
212: /* Re-establish indentation. */
1.205 schwarze 213:
1.263 schwarze 214: if (p->flags & TERMP_BRIND)
1.266 schwarze 215: vbl += p->tcol->rmargin;
1.263 schwarze 216: else
1.266 schwarze 217: vbl += p->tcol->offset;
218: maxvis = p->tcol->rmargin > vbl ?
219: p->tcol->rmargin - vbl : 0;
1.263 schwarze 220: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
221: p->maxrmargin > vbl ? p->maxrmargin - vbl : 0;
1.71 kristaps 222: }
1.138 schwarze 223:
1.267 schwarze 224: /*
225: * Write out the rest of the word.
226: */
227:
1.269 schwarze 228: for ( ; p->tcol->col < p->tcol->lastcol; p->tcol->col++) {
1.267 schwarze 229: if (vend > bp && jhy > 0 && p->tcol->col > jhy)
1.140 kristaps 230: break;
1.270 schwarze 231: if (p->tcol->buf[p->tcol->col] == '\n')
232: continue;
1.267 schwarze 233: if (p->tcol->buf[p->tcol->col] == '\t')
1.138 schwarze 234: break;
1.267 schwarze 235: if (p->tcol->buf[p->tcol->col] == ' ') {
236: j = p->tcol->col;
1.269 schwarze 237: while (p->tcol->col < p->tcol->lastcol &&
1.267 schwarze 238: p->tcol->buf[p->tcol->col] == ' ')
239: p->tcol->col++;
240: dv = (p->tcol->col - j) * (*p->width)(p, ' ');
1.172 schwarze 241: vbl += dv;
242: vend += dv;
1.71 kristaps 243: break;
1.136 schwarze 244: }
1.267 schwarze 245: if (p->tcol->buf[p->tcol->col] == ASCII_NBRSP) {
1.153 kristaps 246: vbl += (*p->width)(p, ' ');
1.136 schwarze 247: continue;
248: }
1.267 schwarze 249: if (p->tcol->buf[p->tcol->col] == ASCII_BREAK)
1.216 schwarze 250: continue;
1.130 kristaps 251:
1.136 schwarze 252: /*
253: * Now we definitely know there will be
254: * printable characters to output,
255: * so write preceding white space now.
256: */
257: if (vbl) {
1.146 kristaps 258: (*p->advance)(p, vbl);
1.139 schwarze 259: p->viscol += vbl;
1.136 schwarze 260: vbl = 0;
1.200 schwarze 261: }
262:
1.267 schwarze 263: (*p->letter)(p, p->tcol->buf[p->tcol->col]);
264: if (p->tcol->buf[p->tcol->col] == '\b')
265: p->viscol -= (*p->width)(p,
266: p->tcol->buf[p->tcol->col - 1]);
1.222 schwarze 267: else
1.267 schwarze 268: p->viscol += (*p->width)(p,
269: p->tcol->buf[p->tcol->col]);
1.136 schwarze 270: }
271: vis = vend;
1.270 schwarze 272:
273: if (breakline == 0)
274: continue;
275:
276: /* Explicitly requested output line break. */
277:
278: if (p->flags & TERMP_MULTICOL)
279: return;
280:
281: endline(p);
282: breakline = 0;
283: vis = vend = 0;
284:
285: /* Re-establish indentation. */
286:
287: vbl = p->tcol->offset;
288: maxvis = p->tcol->rmargin > vbl ?
289: p->tcol->rmargin - vbl : 0;
290: bp = !(p->flags & TERMP_NOBREAK) ? maxvis :
291: p->maxrmargin > vbl ? p->maxrmargin - vbl : 0;
1.71 kristaps 292: }
1.168 schwarze 293:
294: /*
295: * If there was trailing white space, it was not printed;
296: * so reset the cursor position accordingly.
297: */
1.267 schwarze 298:
1.235 schwarze 299: if (vis > vbl)
1.200 schwarze 300: vis -= vbl;
1.235 schwarze 301: else
302: vis = 0;
1.111 kristaps 303:
1.269 schwarze 304: p->col = p->tcol->col = p->tcol->lastcol = 0;
1.264 schwarze 305: p->minbl = p->trailspace;
1.263 schwarze 306: p->flags &= ~(TERMP_BACKAFTER | TERMP_BACKBEFORE | TERMP_NOPAD);
1.15 kristaps 307:
1.269 schwarze 308: if (p->flags & TERMP_MULTICOL)
309: return;
310:
1.250 schwarze 311: /* Trailing whitespace is significant in some columns. */
1.267 schwarze 312:
1.250 schwarze 313: if (vis && vbl && (TERMP_BRTRSP & p->flags))
314: vis += vbl;
1.15 kristaps 315:
1.200 schwarze 316: /* If the column was overrun, break the line. */
1.264 schwarze 317: if ((p->flags & TERMP_NOBREAK) == 0 ||
318: ((p->flags & TERMP_HANG) == 0 &&
319: vis + p->trailspace * (*p->width)(p, ' ') > maxvis))
320: endline(p);
321: }
322:
323: static void
324: endline(struct termp *p)
325: {
326: if ((p->flags & (TERMP_NEWMC | TERMP_ENDMC)) == TERMP_ENDMC) {
327: p->mc = NULL;
328: p->flags &= ~TERMP_ENDMC;
329: }
330: if (p->mc != NULL) {
331: if (p->viscol && p->maxrmargin >= p->viscol)
332: (*p->advance)(p, p->maxrmargin - p->viscol + 1);
333: p->flags |= TERMP_NOBUF | TERMP_NOSPACE;
334: term_word(p, p->mc);
335: p->flags &= ~(TERMP_NOBUF | TERMP_NEWMC);
336: }
337: p->viscol = 0;
338: p->minbl = 0;
339: (*p->endline)(p);
1.15 kristaps 340: }
341:
1.222 schwarze 342: /*
1.71 kristaps 343: * A newline only breaks an existing line; it won't assert vertical
344: * space. All data in the output buffer is flushed prior to the newline
345: * assertion.
346: */
347: void
348: term_newln(struct termp *p)
1.15 kristaps 349: {
350:
1.71 kristaps 351: p->flags |= TERMP_NOSPACE;
1.269 schwarze 352: if (p->tcol->lastcol || p->viscol)
1.200 schwarze 353: term_flushln(p);
1.16 kristaps 354: }
355:
1.71 kristaps 356: /*
357: * Asserts a vertical space (a full, empty line-break between lines).
358: * Note that if used twice, this will cause two blank spaces and so on.
359: * All data in the output buffer is flushed prior to the newline
360: * assertion.
361: */
362: void
363: term_vspace(struct termp *p)
1.16 kristaps 364: {
365:
1.62 kristaps 366: term_newln(p);
1.139 schwarze 367: p->viscol = 0;
1.264 schwarze 368: p->minbl = 0;
1.202 schwarze 369: if (0 < p->skipvsp)
370: p->skipvsp--;
371: else
372: (*p->endline)(p);
1.16 kristaps 373: }
374:
1.238 schwarze 375: /* Swap current and previous font; for \fP and .ft P */
1.125 kristaps 376: void
377: term_fontlast(struct termp *p)
378: {
379: enum termfont f;
380:
381: f = p->fontl;
382: p->fontl = p->fontq[p->fonti];
383: p->fontq[p->fonti] = f;
384: }
385:
1.238 schwarze 386: /* Set font, save current, discard previous; for \f, .ft, .B etc. */
1.125 kristaps 387: void
388: term_fontrepl(struct termp *p, enum termfont f)
389: {
390:
391: p->fontl = p->fontq[p->fonti];
392: p->fontq[p->fonti] = f;
393: }
394:
1.238 schwarze 395: /* Set font, save previous. */
1.125 kristaps 396: void
397: term_fontpush(struct termp *p, enum termfont f)
398: {
399:
400: p->fontl = p->fontq[p->fonti];
1.238 schwarze 401: if (++p->fonti == p->fontsz) {
402: p->fontsz += 8;
403: p->fontq = mandoc_reallocarray(p->fontq,
1.256 schwarze 404: p->fontsz, sizeof(*p->fontq));
1.238 schwarze 405: }
406: p->fontq[p->fonti] = f;
1.125 kristaps 407: }
408:
1.238 schwarze 409: /* Flush to make the saved pointer current again. */
1.125 kristaps 410: void
1.244 schwarze 411: term_fontpopq(struct termp *p, int i)
1.125 kristaps 412: {
413:
1.244 schwarze 414: assert(i >= 0);
415: if (p->fonti > i)
416: p->fonti = i;
1.125 kristaps 417: }
1.94 kristaps 418:
1.238 schwarze 419: /* Pop one font off the stack. */
1.125 kristaps 420: void
421: term_fontpop(struct termp *p)
422: {
423:
424: assert(p->fonti);
425: p->fonti--;
1.17 kristaps 426: }
427:
1.71 kristaps 428: /*
429: * Handle pwords, partial words, which may be either a single word or a
430: * phrase that cannot be broken down (such as a literal string). This
431: * handles word styling.
432: */
1.86 kristaps 433: void
434: term_word(struct termp *p, const char *word)
1.65 kristaps 435: {
1.261 schwarze 436: struct roffsu su;
1.214 schwarze 437: const char nbrsp[2] = { ASCII_NBRSP, 0 };
1.191 kristaps 438: const char *seq, *cp;
1.194 kristaps 439: int sz, uc;
1.262 schwarze 440: size_t csz, lsz, ssz;
1.184 kristaps 441: enum mandoc_esc esc;
1.100 kristaps 442:
1.264 schwarze 443: if ((p->flags & TERMP_NOBUF) == 0) {
444: if ((p->flags & TERMP_NOSPACE) == 0) {
445: if ((p->flags & TERMP_KEEP) == 0) {
1.151 schwarze 446: bufferc(p, ' ');
1.264 schwarze 447: if (p->flags & TERMP_SENTENCE)
448: bufferc(p, ' ');
449: } else
450: bufferc(p, ASCII_NBRSP);
451: }
452: if (p->flags & TERMP_PREKEEP)
453: p->flags |= TERMP_KEEP;
454: if (p->flags & TERMP_NONOSPACE)
455: p->flags |= TERMP_NOSPACE;
456: else
457: p->flags &= ~TERMP_NOSPACE;
458: p->flags &= ~(TERMP_SENTENCE | TERMP_NONEWLINE);
459: p->skipvsp = 0;
1.133 kristaps 460: }
1.65 kristaps 461:
1.184 kristaps 462: while ('\0' != *word) {
1.203 schwarze 463: if ('\\' != *word) {
1.214 schwarze 464: if (TERMP_NBRWORD & p->flags) {
465: if (' ' == *word) {
466: encode(p, nbrsp, 1);
467: word++;
468: continue;
469: }
470: ssz = strcspn(word, "\\ ");
471: } else
472: ssz = strcspn(word, "\\");
1.162 kristaps 473: encode(p, word, ssz);
1.203 schwarze 474: word += (int)ssz;
1.124 kristaps 475: continue;
1.203 schwarze 476: }
1.124 kristaps 477:
1.184 kristaps 478: word++;
479: esc = mandoc_escape(&word, &seq, &sz);
480: if (ESCAPE_ERROR == esc)
1.224 schwarze 481: continue;
1.124 kristaps 482:
1.184 kristaps 483: switch (esc) {
1.222 schwarze 484: case ESCAPE_UNICODE:
1.229 schwarze 485: uc = mchars_num2uc(seq + 1, sz - 1);
1.192 kristaps 486: break;
1.222 schwarze 487: case ESCAPE_NUMBERED:
1.233 schwarze 488: uc = mchars_num2char(seq, sz);
489: if (uc < 0)
490: continue;
1.184 kristaps 491: break;
1.222 schwarze 492: case ESCAPE_SPECIAL:
1.229 schwarze 493: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 494: cp = mchars_spec2str(seq, sz, &ssz);
1.232 schwarze 495: if (cp != NULL)
1.229 schwarze 496: encode(p, cp, ssz);
497: } else {
1.254 schwarze 498: uc = mchars_spec2cp(seq, sz);
1.230 schwarze 499: if (uc > 0)
500: encode1(p, uc);
1.229 schwarze 501: }
1.233 schwarze 502: continue;
1.222 schwarze 503: case ESCAPE_FONTBOLD:
1.125 kristaps 504: term_fontrepl(p, TERMFONT_BOLD);
1.233 schwarze 505: continue;
1.222 schwarze 506: case ESCAPE_FONTITALIC:
1.125 kristaps 507: term_fontrepl(p, TERMFONT_UNDER);
1.233 schwarze 508: continue;
1.222 schwarze 509: case ESCAPE_FONTBI:
1.209 schwarze 510: term_fontrepl(p, TERMFONT_BI);
1.233 schwarze 511: continue;
1.222 schwarze 512: case ESCAPE_FONT:
513: case ESCAPE_FONTROMAN:
1.125 kristaps 514: term_fontrepl(p, TERMFONT_NONE);
1.233 schwarze 515: continue;
1.222 schwarze 516: case ESCAPE_FONTPREV:
1.125 kristaps 517: term_fontlast(p);
1.270 schwarze 518: continue;
519: case ESCAPE_BREAK:
520: bufferc(p, '\n');
1.233 schwarze 521: continue;
1.222 schwarze 522: case ESCAPE_NOSPACE:
1.248 schwarze 523: if (p->flags & TERMP_BACKAFTER)
524: p->flags &= ~TERMP_BACKAFTER;
525: else if (*word == '\0')
1.237 schwarze 526: p->flags |= (TERMP_NOSPACE | TERMP_NONEWLINE);
1.261 schwarze 527: continue;
528: case ESCAPE_HORIZ:
1.273 schwarze 529: if (*seq == '|') {
530: seq++;
531: uc = -p->col;
532: } else
533: uc = 0;
1.268 schwarze 534: if (a2roffsu(seq, &su, SCALE_EM) == NULL)
1.261 schwarze 535: continue;
1.273 schwarze 536: uc += term_hen(p, &su);
1.261 schwarze 537: if (uc > 0)
538: while (uc-- > 0)
539: bufferc(p, ASCII_NBRSP);
540: else if (p->col > (size_t)(-uc))
541: p->col += uc;
542: else {
543: uc += p->col;
544: p->col = 0;
1.266 schwarze 545: if (p->tcol->offset > (size_t)(-uc)) {
1.261 schwarze 546: p->ti += uc;
1.266 schwarze 547: p->tcol->offset += uc;
1.261 schwarze 548: } else {
1.266 schwarze 549: p->ti -= p->tcol->offset;
550: p->tcol->offset = 0;
1.261 schwarze 551: }
1.262 schwarze 552: }
553: continue;
554: case ESCAPE_HLINE:
1.272 schwarze 555: if ((cp = a2roffsu(seq, &su, SCALE_EM)) == NULL)
1.262 schwarze 556: continue;
1.271 schwarze 557: uc = term_hen(p, &su);
1.262 schwarze 558: if (uc <= 0) {
1.266 schwarze 559: if (p->tcol->rmargin <= p->tcol->offset)
1.262 schwarze 560: continue;
1.266 schwarze 561: lsz = p->tcol->rmargin - p->tcol->offset;
1.262 schwarze 562: } else
563: lsz = uc;
1.272 schwarze 564: if (*cp == seq[-1])
1.262 schwarze 565: uc = -1;
1.272 schwarze 566: else if (*cp == '\\') {
567: seq = cp + 1;
1.262 schwarze 568: esc = mandoc_escape(&seq, &cp, &sz);
569: switch (esc) {
570: case ESCAPE_UNICODE:
571: uc = mchars_num2uc(cp + 1, sz - 1);
572: break;
573: case ESCAPE_NUMBERED:
574: uc = mchars_num2char(cp, sz);
575: break;
576: case ESCAPE_SPECIAL:
577: uc = mchars_spec2cp(cp, sz);
578: break;
579: default:
580: uc = -1;
581: break;
582: }
583: } else
1.272 schwarze 584: uc = *cp;
1.262 schwarze 585: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
586: uc = '_';
587: if (p->enc == TERMENC_ASCII) {
588: cp = ascii_uc2str(uc);
589: csz = term_strlen(p, cp);
590: ssz = strlen(cp);
591: } else
592: csz = (*p->width)(p, uc);
593: while (lsz >= csz) {
594: if (p->enc == TERMENC_ASCII)
595: encode(p, cp, ssz);
596: else
597: encode1(p, uc);
598: lsz -= csz;
1.261 schwarze 599: }
1.233 schwarze 600: continue;
1.222 schwarze 601: case ESCAPE_SKIPCHAR:
1.248 schwarze 602: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 603: continue;
1.243 schwarze 604: case ESCAPE_OVERSTRIKE:
605: cp = seq + sz;
606: while (seq < cp) {
607: if (*seq == '\\') {
608: mandoc_escape(&seq, NULL, NULL);
609: continue;
610: }
611: encode1(p, *seq++);
1.248 schwarze 612: if (seq < cp) {
613: if (p->flags & TERMP_BACKBEFORE)
614: p->flags |= TERMP_BACKAFTER;
615: else
616: p->flags |= TERMP_BACKBEFORE;
617: }
1.243 schwarze 618: }
1.249 schwarze 619: /* Trim trailing backspace/blank pair. */
1.269 schwarze 620: if (p->tcol->lastcol > 2 &&
621: (p->tcol->buf[p->tcol->lastcol - 1] == ' ' ||
622: p->tcol->buf[p->tcol->lastcol - 1] == '\t'))
623: p->tcol->lastcol -= 2;
624: if (p->col > p->tcol->lastcol)
625: p->col = p->tcol->lastcol;
1.248 schwarze 626: continue;
1.124 kristaps 627: default:
1.233 schwarze 628: continue;
629: }
630:
631: /*
632: * Common handling for Unicode and numbered
633: * character escape sequences.
634: */
635:
636: if (p->enc == TERMENC_ASCII) {
637: cp = ascii_uc2str(uc);
638: encode(p, cp, strlen(cp));
639: } else {
640: if ((uc < 0x20 && uc != 0x09) ||
641: (uc > 0x7E && uc < 0xA0))
642: uc = 0xFFFD;
643: encode1(p, uc);
1.124 kristaps 644: }
645: }
1.214 schwarze 646: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 647: }
648:
1.71 kristaps 649: static void
1.266 schwarze 650: adjbuf(struct termp_col *c, size_t sz)
1.51 kristaps 651: {
1.266 schwarze 652: if (c->maxcols == 0)
653: c->maxcols = 1024;
654: while (c->maxcols <= sz)
655: c->maxcols <<= 2;
656: c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
1.51 kristaps 657: }
658:
1.79 kristaps 659: static void
1.125 kristaps 660: bufferc(struct termp *p, char c)
661: {
1.264 schwarze 662: if (p->flags & TERMP_NOBUF) {
663: (*p->letter)(p, c);
664: return;
665: }
1.266 schwarze 666: if (p->col + 1 >= p->tcol->maxcols)
667: adjbuf(p->tcol, p->col + 1);
1.269 schwarze 668: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 669: p->tcol->buf[p->col] = c;
1.269 schwarze 670: if (p->tcol->lastcol < ++p->col)
671: p->tcol->lastcol = p->col;
1.125 kristaps 672: }
673:
1.194 kristaps 674: /*
675: * See encode().
676: * Do this for a single (probably unicode) value.
677: * Does not check for non-decorated glyphs.
678: */
679: static void
680: encode1(struct termp *p, int c)
681: {
682: enum termfont f;
683:
1.264 schwarze 684: if (p->flags & TERMP_NOBUF) {
685: (*p->letter)(p, c);
686: return;
687: }
688:
1.266 schwarze 689: if (p->col + 7 >= p->tcol->maxcols)
690: adjbuf(p->tcol, p->col + 7);
1.194 kristaps 691:
1.255 schwarze 692: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 693: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 694:
1.248 schwarze 695: if (p->flags & TERMP_BACKBEFORE) {
1.266 schwarze 696: if (p->tcol->buf[p->col - 1] == ' ' ||
697: p->tcol->buf[p->col - 1] == '\t')
1.249 schwarze 698: p->col--;
699: else
1.266 schwarze 700: p->tcol->buf[p->col++] = '\b';
1.248 schwarze 701: p->flags &= ~TERMP_BACKBEFORE;
702: }
1.266 schwarze 703: if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
704: p->tcol->buf[p->col++] = '_';
705: p->tcol->buf[p->col++] = '\b';
706: }
707: if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
708: if (c == ASCII_HYPH)
709: p->tcol->buf[p->col++] = '-';
1.209 schwarze 710: else
1.266 schwarze 711: p->tcol->buf[p->col++] = c;
712: p->tcol->buf[p->col++] = '\b';
1.209 schwarze 713: }
1.269 schwarze 714: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 715: p->tcol->buf[p->col] = c;
1.269 schwarze 716: if (p->tcol->lastcol < ++p->col)
717: p->tcol->lastcol = p->col;
1.248 schwarze 718: if (p->flags & TERMP_BACKAFTER) {
719: p->flags |= TERMP_BACKBEFORE;
720: p->flags &= ~TERMP_BACKAFTER;
721: }
1.194 kristaps 722: }
723:
1.125 kristaps 724: static void
725: encode(struct termp *p, const char *word, size_t sz)
726: {
1.210 schwarze 727: size_t i;
1.264 schwarze 728:
729: if (p->flags & TERMP_NOBUF) {
730: for (i = 0; i < sz; i++)
731: (*p->letter)(p, word[i]);
732: return;
733: }
1.188 kristaps 734:
1.266 schwarze 735: if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
736: adjbuf(p->tcol, p->col + 2 + (sz * 5));
1.165 kristaps 737:
1.210 schwarze 738: for (i = 0; i < sz; i++) {
1.209 schwarze 739: if (ASCII_HYPH == word[i] ||
740: isgraph((unsigned char)word[i]))
741: encode1(p, word[i]);
1.259 schwarze 742: else {
1.269 schwarze 743: if (p->tcol->lastcol <= p->col ||
1.265 schwarze 744: (word[i] != ' ' && word[i] != ASCII_NBRSP))
1.266 schwarze 745: p->tcol->buf[p->col] = word[i];
1.265 schwarze 746: p->col++;
1.259 schwarze 747:
748: /*
749: * Postpone the effect of \z while handling
750: * an overstrike sequence from ascii_uc2str().
751: */
752:
753: if (word[i] == '\b' &&
754: (p->flags & TERMP_BACKBEFORE)) {
755: p->flags &= ~TERMP_BACKBEFORE;
756: p->flags |= TERMP_BACKAFTER;
757: }
758: }
1.79 kristaps 759: }
1.269 schwarze 760: if (p->tcol->lastcol < p->col)
761: p->tcol->lastcol = p->col;
1.219 schwarze 762: }
763:
764: void
765: term_setwidth(struct termp *p, const char *wstr)
766: {
767: struct roffsu su;
1.247 schwarze 768: int iop, width;
1.219 schwarze 769:
1.220 schwarze 770: iop = 0;
771: width = 0;
1.219 schwarze 772: if (NULL != wstr) {
773: switch (*wstr) {
1.222 schwarze 774: case '+':
1.219 schwarze 775: iop = 1;
776: wstr++;
777: break;
1.222 schwarze 778: case '-':
1.219 schwarze 779: iop = -1;
780: wstr++;
781: break;
782: default:
783: break;
784: }
1.268 schwarze 785: if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
1.220 schwarze 786: width = term_hspan(p, &su);
787: else
1.219 schwarze 788: iop = 0;
789: }
790: (*p->setwidth)(p, iop, width);
1.79 kristaps 791: }
1.106 kristaps 792:
1.107 kristaps 793: size_t
1.149 kristaps 794: term_len(const struct termp *p, size_t sz)
795: {
796:
1.252 schwarze 797: return (*p->width)(p, ' ') * sz;
1.149 kristaps 798: }
799:
1.203 schwarze 800: static size_t
801: cond_width(const struct termp *p, int c, int *skip)
802: {
803:
804: if (*skip) {
805: (*skip) = 0;
1.252 schwarze 806: return 0;
1.203 schwarze 807: } else
1.252 schwarze 808: return (*p->width)(p, c);
1.203 schwarze 809: }
1.149 kristaps 810:
811: size_t
812: term_strlen(const struct termp *p, const char *cp)
813: {
1.184 kristaps 814: size_t sz, rsz, i;
1.233 schwarze 815: int ssz, skip, uc;
1.171 kristaps 816: const char *seq, *rhs;
1.196 kristaps 817: enum mandoc_esc esc;
1.216 schwarze 818: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
819: ASCII_BREAK, '\0' };
1.171 kristaps 820:
1.184 kristaps 821: /*
822: * Account for escaped sequences within string length
823: * calculations. This follows the logic in term_word() as we
824: * must calculate the width of produced strings.
825: */
826:
827: sz = 0;
1.203 schwarze 828: skip = 0;
1.189 kristaps 829: while ('\0' != *cp) {
830: rsz = strcspn(cp, rej);
831: for (i = 0; i < rsz; i++)
1.203 schwarze 832: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 833:
1.184 kristaps 834: switch (*cp) {
1.222 schwarze 835: case '\\':
1.189 kristaps 836: cp++;
1.196 kristaps 837: esc = mandoc_escape(&cp, &seq, &ssz);
838: if (ESCAPE_ERROR == esc)
1.224 schwarze 839: continue;
1.196 kristaps 840:
841: rhs = NULL;
842:
843: switch (esc) {
1.222 schwarze 844: case ESCAPE_UNICODE:
1.234 schwarze 845: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 846: break;
1.222 schwarze 847: case ESCAPE_NUMBERED:
1.233 schwarze 848: uc = mchars_num2char(seq, ssz);
849: if (uc < 0)
850: continue;
1.171 kristaps 851: break;
1.222 schwarze 852: case ESCAPE_SPECIAL:
1.233 schwarze 853: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 854: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 855: if (rhs != NULL)
856: break;
857: } else {
1.254 schwarze 858: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 859: if (uc > 0)
860: sz += cond_width(p, uc, &skip);
1.229 schwarze 861: }
1.233 schwarze 862: continue;
1.222 schwarze 863: case ESCAPE_SKIPCHAR:
1.203 schwarze 864: skip = 1;
1.243 schwarze 865: continue;
866: case ESCAPE_OVERSTRIKE:
867: rsz = 0;
868: rhs = seq + ssz;
869: while (seq < rhs) {
870: if (*seq == '\\') {
871: mandoc_escape(&seq, NULL, NULL);
872: continue;
873: }
874: i = (*p->width)(p, *seq++);
875: if (rsz < i)
876: rsz = i;
877: }
878: sz += rsz;
1.233 schwarze 879: continue;
1.171 kristaps 880: default:
1.233 schwarze 881: continue;
1.171 kristaps 882: }
1.149 kristaps 883:
1.233 schwarze 884: /*
885: * Common handling for Unicode and numbered
886: * character escape sequences.
887: */
888:
889: if (rhs == NULL) {
890: if (p->enc == TERMENC_ASCII) {
891: rhs = ascii_uc2str(uc);
892: rsz = strlen(rhs);
893: } else {
894: if ((uc < 0x20 && uc != 0x09) ||
895: (uc > 0x7E && uc < 0xA0))
896: uc = 0xFFFD;
897: sz += cond_width(p, uc, &skip);
898: continue;
899: }
900: }
1.184 kristaps 901:
1.203 schwarze 902: if (skip) {
903: skip = 0;
904: break;
905: }
1.233 schwarze 906:
907: /*
908: * Common handling for all escape sequences
909: * printing more than one character.
910: */
1.203 schwarze 911:
1.184 kristaps 912: for (i = 0; i < rsz; i++)
913: sz += (*p->width)(p, *rhs++);
914: break;
1.222 schwarze 915: case ASCII_NBRSP:
1.203 schwarze 916: sz += cond_width(p, ' ', &skip);
1.176 kristaps 917: cp++;
1.184 kristaps 918: break;
1.222 schwarze 919: case ASCII_HYPH:
1.203 schwarze 920: sz += cond_width(p, '-', &skip);
1.176 kristaps 921: cp++;
1.184 kristaps 922: break;
923: default:
924: break;
925: }
1.189 kristaps 926: }
1.149 kristaps 927:
1.252 schwarze 928: return sz;
1.149 kristaps 929: }
930:
1.240 schwarze 931: int
1.149 kristaps 932: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 933: {
934: double r;
1.241 schwarze 935: int ri;
1.106 kristaps 936:
1.107 kristaps 937: switch (su->unit) {
1.239 schwarze 938: case SCALE_BU:
939: r = su->scale / 40.0;
940: break;
1.222 schwarze 941: case SCALE_CM:
1.239 schwarze 942: r = su->scale * 6.0 / 2.54;
943: break;
944: case SCALE_FS:
945: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 946: break;
1.222 schwarze 947: case SCALE_IN:
1.225 schwarze 948: r = su->scale * 6.0;
1.106 kristaps 949: break;
1.239 schwarze 950: case SCALE_MM:
951: r = su->scale * 0.006;
952: break;
1.222 schwarze 953: case SCALE_PC:
1.107 kristaps 954: r = su->scale;
1.106 kristaps 955: break;
1.222 schwarze 956: case SCALE_PT:
1.239 schwarze 957: r = su->scale / 12.0;
1.106 kristaps 958: break;
1.239 schwarze 959: case SCALE_EN:
960: case SCALE_EM:
961: r = su->scale * 0.6;
1.106 kristaps 962: break;
1.222 schwarze 963: case SCALE_VS:
1.107 kristaps 964: r = su->scale;
1.106 kristaps 965: break;
966: default:
1.239 schwarze 967: abort();
1.106 kristaps 968: }
1.241 schwarze 969: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 970: return ri < 66 ? ri : 1;
1.106 kristaps 971: }
972:
1.247 schwarze 973: /*
1.271 schwarze 974: * Convert a scaling width to basic units, rounding towards 0.
1.247 schwarze 975: */
1.240 schwarze 976: int
1.149 kristaps 977: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 978: {
1.108 kristaps 979:
1.252 schwarze 980: return (*p->hspan)(p, su);
1.271 schwarze 981: }
982:
983: /*
984: * Convert a scaling width to basic units, rounding to closest.
985: */
986: int
987: term_hen(const struct termp *p, const struct roffsu *su)
988: {
989: int bu;
990:
991: if ((bu = (*p->hspan)(p, su)) >= 0)
992: return (bu + 11) / 24;
993: else
994: return -((-bu + 11) / 24);
1.106 kristaps 995: }
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