Annotation of mandoc/term.c, Revision 1.275
1.275 ! schwarze 1: /* $Id: term.c,v 1.274 2017/07/28 14:25:48 schwarze Exp $ */
1.1 kristaps 2: /*
1.198 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.275 ! schwarze 4: * Copyright (c) 2010-2018 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;
1.275 ! schwarze 528: case ESCAPE_DEVICE:
! 529: if (p->type == TERMTYPE_PDF)
! 530: encode(p, "pdf", 3);
! 531: else if (p->type == TERMTYPE_PS)
! 532: encode(p, "ps", 2);
! 533: else if (p->enc == TERMENC_ASCII)
! 534: encode(p, "ascii", 5);
! 535: else
! 536: encode(p, "utf8", 4);
! 537: continue;
1.261 schwarze 538: case ESCAPE_HORIZ:
1.273 schwarze 539: if (*seq == '|') {
540: seq++;
541: uc = -p->col;
542: } else
543: uc = 0;
1.268 schwarze 544: if (a2roffsu(seq, &su, SCALE_EM) == NULL)
1.261 schwarze 545: continue;
1.273 schwarze 546: uc += term_hen(p, &su);
1.261 schwarze 547: if (uc > 0)
548: while (uc-- > 0)
549: bufferc(p, ASCII_NBRSP);
550: else if (p->col > (size_t)(-uc))
551: p->col += uc;
552: else {
553: uc += p->col;
554: p->col = 0;
1.266 schwarze 555: if (p->tcol->offset > (size_t)(-uc)) {
1.261 schwarze 556: p->ti += uc;
1.266 schwarze 557: p->tcol->offset += uc;
1.261 schwarze 558: } else {
1.266 schwarze 559: p->ti -= p->tcol->offset;
560: p->tcol->offset = 0;
1.261 schwarze 561: }
1.262 schwarze 562: }
563: continue;
564: case ESCAPE_HLINE:
1.272 schwarze 565: if ((cp = a2roffsu(seq, &su, SCALE_EM)) == NULL)
1.262 schwarze 566: continue;
1.271 schwarze 567: uc = term_hen(p, &su);
1.262 schwarze 568: if (uc <= 0) {
1.266 schwarze 569: if (p->tcol->rmargin <= p->tcol->offset)
1.262 schwarze 570: continue;
1.266 schwarze 571: lsz = p->tcol->rmargin - p->tcol->offset;
1.262 schwarze 572: } else
573: lsz = uc;
1.272 schwarze 574: if (*cp == seq[-1])
1.262 schwarze 575: uc = -1;
1.272 schwarze 576: else if (*cp == '\\') {
577: seq = cp + 1;
1.262 schwarze 578: esc = mandoc_escape(&seq, &cp, &sz);
579: switch (esc) {
580: case ESCAPE_UNICODE:
581: uc = mchars_num2uc(cp + 1, sz - 1);
582: break;
583: case ESCAPE_NUMBERED:
584: uc = mchars_num2char(cp, sz);
585: break;
586: case ESCAPE_SPECIAL:
587: uc = mchars_spec2cp(cp, sz);
588: break;
589: default:
590: uc = -1;
591: break;
592: }
593: } else
1.272 schwarze 594: uc = *cp;
1.262 schwarze 595: if (uc < 0x20 || (uc > 0x7E && uc < 0xA0))
596: uc = '_';
597: if (p->enc == TERMENC_ASCII) {
598: cp = ascii_uc2str(uc);
599: csz = term_strlen(p, cp);
600: ssz = strlen(cp);
601: } else
602: csz = (*p->width)(p, uc);
603: while (lsz >= csz) {
604: if (p->enc == TERMENC_ASCII)
605: encode(p, cp, ssz);
606: else
607: encode1(p, uc);
608: lsz -= csz;
1.261 schwarze 609: }
1.233 schwarze 610: continue;
1.222 schwarze 611: case ESCAPE_SKIPCHAR:
1.248 schwarze 612: p->flags |= TERMP_BACKAFTER;
1.233 schwarze 613: continue;
1.243 schwarze 614: case ESCAPE_OVERSTRIKE:
615: cp = seq + sz;
616: while (seq < cp) {
617: if (*seq == '\\') {
618: mandoc_escape(&seq, NULL, NULL);
619: continue;
620: }
621: encode1(p, *seq++);
1.248 schwarze 622: if (seq < cp) {
623: if (p->flags & TERMP_BACKBEFORE)
624: p->flags |= TERMP_BACKAFTER;
625: else
626: p->flags |= TERMP_BACKBEFORE;
627: }
1.243 schwarze 628: }
1.249 schwarze 629: /* Trim trailing backspace/blank pair. */
1.269 schwarze 630: if (p->tcol->lastcol > 2 &&
631: (p->tcol->buf[p->tcol->lastcol - 1] == ' ' ||
632: p->tcol->buf[p->tcol->lastcol - 1] == '\t'))
633: p->tcol->lastcol -= 2;
634: if (p->col > p->tcol->lastcol)
635: p->col = p->tcol->lastcol;
1.248 schwarze 636: continue;
1.124 kristaps 637: default:
1.233 schwarze 638: continue;
639: }
640:
641: /*
642: * Common handling for Unicode and numbered
643: * character escape sequences.
644: */
645:
646: if (p->enc == TERMENC_ASCII) {
647: cp = ascii_uc2str(uc);
648: encode(p, cp, strlen(cp));
649: } else {
650: if ((uc < 0x20 && uc != 0x09) ||
651: (uc > 0x7E && uc < 0xA0))
652: uc = 0xFFFD;
653: encode1(p, uc);
1.124 kristaps 654: }
655: }
1.214 schwarze 656: p->flags &= ~TERMP_NBRWORD;
1.65 kristaps 657: }
658:
1.71 kristaps 659: static void
1.266 schwarze 660: adjbuf(struct termp_col *c, size_t sz)
1.51 kristaps 661: {
1.266 schwarze 662: if (c->maxcols == 0)
663: c->maxcols = 1024;
664: while (c->maxcols <= sz)
665: c->maxcols <<= 2;
666: c->buf = mandoc_reallocarray(c->buf, c->maxcols, sizeof(*c->buf));
1.51 kristaps 667: }
668:
1.79 kristaps 669: static void
1.125 kristaps 670: bufferc(struct termp *p, char c)
671: {
1.264 schwarze 672: if (p->flags & TERMP_NOBUF) {
673: (*p->letter)(p, c);
674: return;
675: }
1.266 schwarze 676: if (p->col + 1 >= p->tcol->maxcols)
677: adjbuf(p->tcol, p->col + 1);
1.269 schwarze 678: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 679: p->tcol->buf[p->col] = c;
1.269 schwarze 680: if (p->tcol->lastcol < ++p->col)
681: p->tcol->lastcol = p->col;
1.125 kristaps 682: }
683:
1.194 kristaps 684: /*
685: * See encode().
686: * Do this for a single (probably unicode) value.
687: * Does not check for non-decorated glyphs.
688: */
689: static void
690: encode1(struct termp *p, int c)
691: {
692: enum termfont f;
693:
1.264 schwarze 694: if (p->flags & TERMP_NOBUF) {
695: (*p->letter)(p, c);
696: return;
697: }
698:
1.266 schwarze 699: if (p->col + 7 >= p->tcol->maxcols)
700: adjbuf(p->tcol, p->col + 7);
1.194 kristaps 701:
1.255 schwarze 702: f = (c == ASCII_HYPH || c > 127 || isgraph(c)) ?
1.248 schwarze 703: p->fontq[p->fonti] : TERMFONT_NONE;
1.194 kristaps 704:
1.248 schwarze 705: if (p->flags & TERMP_BACKBEFORE) {
1.266 schwarze 706: if (p->tcol->buf[p->col - 1] == ' ' ||
707: p->tcol->buf[p->col - 1] == '\t')
1.249 schwarze 708: p->col--;
709: else
1.266 schwarze 710: p->tcol->buf[p->col++] = '\b';
1.248 schwarze 711: p->flags &= ~TERMP_BACKBEFORE;
712: }
1.266 schwarze 713: if (f == TERMFONT_UNDER || f == TERMFONT_BI) {
714: p->tcol->buf[p->col++] = '_';
715: p->tcol->buf[p->col++] = '\b';
716: }
717: if (f == TERMFONT_BOLD || f == TERMFONT_BI) {
718: if (c == ASCII_HYPH)
719: p->tcol->buf[p->col++] = '-';
1.209 schwarze 720: else
1.266 schwarze 721: p->tcol->buf[p->col++] = c;
722: p->tcol->buf[p->col++] = '\b';
1.209 schwarze 723: }
1.269 schwarze 724: if (p->tcol->lastcol <= p->col || (c != ' ' && c != ASCII_NBRSP))
1.266 schwarze 725: p->tcol->buf[p->col] = c;
1.269 schwarze 726: if (p->tcol->lastcol < ++p->col)
727: p->tcol->lastcol = p->col;
1.248 schwarze 728: if (p->flags & TERMP_BACKAFTER) {
729: p->flags |= TERMP_BACKBEFORE;
730: p->flags &= ~TERMP_BACKAFTER;
731: }
1.194 kristaps 732: }
733:
1.125 kristaps 734: static void
735: encode(struct termp *p, const char *word, size_t sz)
736: {
1.210 schwarze 737: size_t i;
1.264 schwarze 738:
739: if (p->flags & TERMP_NOBUF) {
740: for (i = 0; i < sz; i++)
741: (*p->letter)(p, word[i]);
742: return;
743: }
1.188 kristaps 744:
1.266 schwarze 745: if (p->col + 2 + (sz * 5) >= p->tcol->maxcols)
746: adjbuf(p->tcol, p->col + 2 + (sz * 5));
1.165 kristaps 747:
1.210 schwarze 748: for (i = 0; i < sz; i++) {
1.209 schwarze 749: if (ASCII_HYPH == word[i] ||
750: isgraph((unsigned char)word[i]))
751: encode1(p, word[i]);
1.259 schwarze 752: else {
1.269 schwarze 753: if (p->tcol->lastcol <= p->col ||
1.265 schwarze 754: (word[i] != ' ' && word[i] != ASCII_NBRSP))
1.266 schwarze 755: p->tcol->buf[p->col] = word[i];
1.265 schwarze 756: p->col++;
1.259 schwarze 757:
758: /*
759: * Postpone the effect of \z while handling
760: * an overstrike sequence from ascii_uc2str().
761: */
762:
763: if (word[i] == '\b' &&
764: (p->flags & TERMP_BACKBEFORE)) {
765: p->flags &= ~TERMP_BACKBEFORE;
766: p->flags |= TERMP_BACKAFTER;
767: }
768: }
1.79 kristaps 769: }
1.269 schwarze 770: if (p->tcol->lastcol < p->col)
771: p->tcol->lastcol = p->col;
1.219 schwarze 772: }
773:
774: void
775: term_setwidth(struct termp *p, const char *wstr)
776: {
777: struct roffsu su;
1.247 schwarze 778: int iop, width;
1.219 schwarze 779:
1.220 schwarze 780: iop = 0;
781: width = 0;
1.219 schwarze 782: if (NULL != wstr) {
783: switch (*wstr) {
1.222 schwarze 784: case '+':
1.219 schwarze 785: iop = 1;
786: wstr++;
787: break;
1.222 schwarze 788: case '-':
1.219 schwarze 789: iop = -1;
790: wstr++;
791: break;
792: default:
793: break;
794: }
1.268 schwarze 795: if (a2roffsu(wstr, &su, SCALE_MAX) != NULL)
1.220 schwarze 796: width = term_hspan(p, &su);
797: else
1.219 schwarze 798: iop = 0;
799: }
800: (*p->setwidth)(p, iop, width);
1.79 kristaps 801: }
1.106 kristaps 802:
1.107 kristaps 803: size_t
1.149 kristaps 804: term_len(const struct termp *p, size_t sz)
805: {
806:
1.252 schwarze 807: return (*p->width)(p, ' ') * sz;
1.149 kristaps 808: }
809:
1.203 schwarze 810: static size_t
811: cond_width(const struct termp *p, int c, int *skip)
812: {
813:
814: if (*skip) {
815: (*skip) = 0;
1.252 schwarze 816: return 0;
1.203 schwarze 817: } else
1.252 schwarze 818: return (*p->width)(p, c);
1.203 schwarze 819: }
1.149 kristaps 820:
821: size_t
822: term_strlen(const struct termp *p, const char *cp)
823: {
1.184 kristaps 824: size_t sz, rsz, i;
1.233 schwarze 825: int ssz, skip, uc;
1.171 kristaps 826: const char *seq, *rhs;
1.196 kristaps 827: enum mandoc_esc esc;
1.216 schwarze 828: static const char rej[] = { '\\', ASCII_NBRSP, ASCII_HYPH,
829: ASCII_BREAK, '\0' };
1.171 kristaps 830:
1.184 kristaps 831: /*
832: * Account for escaped sequences within string length
833: * calculations. This follows the logic in term_word() as we
834: * must calculate the width of produced strings.
835: */
836:
837: sz = 0;
1.203 schwarze 838: skip = 0;
1.189 kristaps 839: while ('\0' != *cp) {
840: rsz = strcspn(cp, rej);
841: for (i = 0; i < rsz; i++)
1.203 schwarze 842: sz += cond_width(p, *cp++, &skip);
1.189 kristaps 843:
1.184 kristaps 844: switch (*cp) {
1.222 schwarze 845: case '\\':
1.189 kristaps 846: cp++;
1.196 kristaps 847: esc = mandoc_escape(&cp, &seq, &ssz);
848: if (ESCAPE_ERROR == esc)
1.224 schwarze 849: continue;
1.196 kristaps 850:
851: rhs = NULL;
852:
853: switch (esc) {
1.222 schwarze 854: case ESCAPE_UNICODE:
1.234 schwarze 855: uc = mchars_num2uc(seq + 1, ssz - 1);
1.194 kristaps 856: break;
1.222 schwarze 857: case ESCAPE_NUMBERED:
1.233 schwarze 858: uc = mchars_num2char(seq, ssz);
859: if (uc < 0)
860: continue;
1.171 kristaps 861: break;
1.222 schwarze 862: case ESCAPE_SPECIAL:
1.233 schwarze 863: if (p->enc == TERMENC_ASCII) {
1.254 schwarze 864: rhs = mchars_spec2str(seq, ssz, &rsz);
1.233 schwarze 865: if (rhs != NULL)
866: break;
867: } else {
1.254 schwarze 868: uc = mchars_spec2cp(seq, ssz);
1.233 schwarze 869: if (uc > 0)
870: sz += cond_width(p, uc, &skip);
1.229 schwarze 871: }
1.233 schwarze 872: continue;
1.275 ! schwarze 873: case ESCAPE_DEVICE:
! 874: if (p->type == TERMTYPE_PDF) {
! 875: rhs = "pdf";
! 876: rsz = 3;
! 877: } else if (p->type == TERMTYPE_PS) {
! 878: rhs = "ps";
! 879: rsz = 2;
! 880: } else if (p->enc == TERMENC_ASCII) {
! 881: rhs = "ascii";
! 882: rsz = 5;
! 883: } else {
! 884: rhs = "utf8";
! 885: rsz = 4;
! 886: }
! 887: break;
1.222 schwarze 888: case ESCAPE_SKIPCHAR:
1.203 schwarze 889: skip = 1;
1.243 schwarze 890: continue;
891: case ESCAPE_OVERSTRIKE:
892: rsz = 0;
893: rhs = seq + ssz;
894: while (seq < rhs) {
895: if (*seq == '\\') {
896: mandoc_escape(&seq, NULL, NULL);
897: continue;
898: }
899: i = (*p->width)(p, *seq++);
900: if (rsz < i)
901: rsz = i;
902: }
903: sz += rsz;
1.233 schwarze 904: continue;
1.171 kristaps 905: default:
1.233 schwarze 906: continue;
1.171 kristaps 907: }
1.149 kristaps 908:
1.233 schwarze 909: /*
910: * Common handling for Unicode and numbered
911: * character escape sequences.
912: */
913:
914: if (rhs == NULL) {
915: if (p->enc == TERMENC_ASCII) {
916: rhs = ascii_uc2str(uc);
917: rsz = strlen(rhs);
918: } else {
919: if ((uc < 0x20 && uc != 0x09) ||
920: (uc > 0x7E && uc < 0xA0))
921: uc = 0xFFFD;
922: sz += cond_width(p, uc, &skip);
923: continue;
924: }
925: }
1.184 kristaps 926:
1.203 schwarze 927: if (skip) {
928: skip = 0;
929: break;
930: }
1.233 schwarze 931:
932: /*
933: * Common handling for all escape sequences
934: * printing more than one character.
935: */
1.203 schwarze 936:
1.184 kristaps 937: for (i = 0; i < rsz; i++)
938: sz += (*p->width)(p, *rhs++);
939: break;
1.222 schwarze 940: case ASCII_NBRSP:
1.203 schwarze 941: sz += cond_width(p, ' ', &skip);
1.176 kristaps 942: cp++;
1.184 kristaps 943: break;
1.222 schwarze 944: case ASCII_HYPH:
1.203 schwarze 945: sz += cond_width(p, '-', &skip);
1.176 kristaps 946: cp++;
1.184 kristaps 947: break;
948: default:
949: break;
950: }
1.189 kristaps 951: }
1.149 kristaps 952:
1.252 schwarze 953: return sz;
1.149 kristaps 954: }
955:
1.240 schwarze 956: int
1.149 kristaps 957: term_vspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 958: {
959: double r;
1.241 schwarze 960: int ri;
1.106 kristaps 961:
1.107 kristaps 962: switch (su->unit) {
1.239 schwarze 963: case SCALE_BU:
964: r = su->scale / 40.0;
965: break;
1.222 schwarze 966: case SCALE_CM:
1.239 schwarze 967: r = su->scale * 6.0 / 2.54;
968: break;
969: case SCALE_FS:
970: r = su->scale * 65536.0 / 40.0;
1.106 kristaps 971: break;
1.222 schwarze 972: case SCALE_IN:
1.225 schwarze 973: r = su->scale * 6.0;
1.106 kristaps 974: break;
1.239 schwarze 975: case SCALE_MM:
976: r = su->scale * 0.006;
977: break;
1.222 schwarze 978: case SCALE_PC:
1.107 kristaps 979: r = su->scale;
1.106 kristaps 980: break;
1.222 schwarze 981: case SCALE_PT:
1.239 schwarze 982: r = su->scale / 12.0;
1.106 kristaps 983: break;
1.239 schwarze 984: case SCALE_EN:
985: case SCALE_EM:
986: r = su->scale * 0.6;
1.106 kristaps 987: break;
1.222 schwarze 988: case SCALE_VS:
1.107 kristaps 989: r = su->scale;
1.106 kristaps 990: break;
991: default:
1.239 schwarze 992: abort();
1.106 kristaps 993: }
1.241 schwarze 994: ri = r > 0.0 ? r + 0.4995 : r - 0.4995;
1.252 schwarze 995: return ri < 66 ? ri : 1;
1.106 kristaps 996: }
997:
1.247 schwarze 998: /*
1.271 schwarze 999: * Convert a scaling width to basic units, rounding towards 0.
1.247 schwarze 1000: */
1.240 schwarze 1001: int
1.149 kristaps 1002: term_hspan(const struct termp *p, const struct roffsu *su)
1.106 kristaps 1003: {
1.108 kristaps 1004:
1.252 schwarze 1005: return (*p->hspan)(p, su);
1.271 schwarze 1006: }
1007:
1008: /*
1009: * Convert a scaling width to basic units, rounding to closest.
1010: */
1011: int
1012: term_hen(const struct termp *p, const struct roffsu *su)
1013: {
1014: int bu;
1015:
1016: if ((bu = (*p->hspan)(p, su)) >= 0)
1017: return (bu + 11) / 24;
1018: else
1019: return -((-bu + 11) / 24);
1.106 kristaps 1020: }
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